CN118602842A - Current balancing device and phase change heat storage device - Google Patents

Abstract

The present application discloses a flow equalizing device and a phase change heat accumulator thereof, wherein the flow equalizing device comprises a first flow equalizing plate, a driving mechanism, and a second flow equalizing plate stacked with the first flow equalizing plate, wherein in the direction from the center to the edge, the first flow equalizing plate is provided with a first inner movable hole and a first outer movable hole in sequence, and the second flow equalizing plate is provided with a first inner through hole and a first outer through hole in sequence, wherein the first inner through hole is provided correspondingly to the first inner movable hole and has a first on-off state, and the first outer through hole is provided correspondingly to the first outer movable hole and has a second on-off state, and the driving mechanism is used to drive the first flow equalizing plate to move relative to the second flow equalizing plate, so that the first on-off state and the second on-off state are switched between fully conducting or at least partially closed, and the first on-off state and the second on-off state are different in the initial state. Thus, the uniformity of the fluid inside and outside the flow equalizing device is improved, so as to improve the heat exchange uniformity of the fluid in the same flow channel, and optimize the working performance of the phase change heat accumulator.

Description

Current balancing device and phase change heat storage device

Technical Field

The present application relates to the technical field of phase change heat accumulators, and in particular to a current equalizing device and a phase change heat accumulator thereof.

Background Art

Phase change heat accumulators are mainly divided into two types: shell and tube type and packed bed type. The packed bed type phase change heat accumulator is made by encapsulating the phase change material into capsules (the shape of the capsules includes but is not limited to plate, column and sphere, etc.). When charging and discharging heat, the heat exchange fluid passes over the surface of multiple capsules for heat exchange. Compared with the shell and tube type phase change heat accumulator, the packed bed type phase change heat accumulator has a larger unit heat storage capacity and heat exchange area, so it is widely used. However, due to the uneven flow distribution of the heat exchange fluid inside and outside the flow channel of the filled phase change heat accumulator, for example, when the heat exchange fluid in the phase change heat accumulator is in a high flow condition, in the inflow channel near the center of the phase change heat accumulator, the outer flow is larger and the inner flow is smaller, and in the outflow channel near the edge of the phase change heat accumulator, the outer flow is larger and the inner flow is smaller; when the heat exchange fluid in the phase change heat accumulator is in a low flow condition, in the inflow channel near the center of the phase change heat accumulator, the outer flow is larger and the inner flow is smaller, and in the outflow channel near the edge of the phase change heat accumulator, the outer flow is smaller and the inner flow is larger. As a result, when the heat exchange fluid passes through the capsule, the heat exchange inside and outside the same flow channel is uneven, resulting in a decrease in the working performance of the phase change heat accumulator, such as the charging and discharging power or the heat storage and discharging.

Summary of the invention

In order to solve at least one of the above-mentioned technical problems, the present application provides a flow balancing device and a phase change heat accumulator thereof, which can improve the uniformity of the fluid inside and outside the flow balancing device, so as to improve the heat exchange uniformity of the fluid in the same flow channel and optimize the working performance of the phase change heat accumulator.

To achieve the above objectives, in a first aspect, the present application discloses a current balancing device, comprising:

A first flow balancing plate, wherein the first flow balancing plate is provided with first inner active holes and first outer active holes in sequence from the center to the edge thereof;

a second current balancing plate, wherein the first current balancing plate is stacked on the second current balancing plate, and the second current balancing plate is provided with a first inner through hole and a first outer through hole in sequence from the center to the edge thereof, the first inner through hole is arranged correspondingly to the first inner movable hole and has a first on-off state, and the first outer through hole is arranged correspondingly to the first outer movable hole and has a second on-off state; and

A driving mechanism, wherein the driving mechanism is connected to the first current balancing plate, and the driving mechanism is used to drive the first current balancing plate to move relative to the second current balancing plate, so that the first on-off state and the second on-off state are switched between fully on or at least partially closed, and in an initial state, the first on-off state is different from the second on-off state.

As an optional embodiment, in an embodiment of the first aspect of the present application, the current balancing device is applied in a box body, and the driving mechanism includes a temperature-sensitive material and a first elastic member arranged at intervals, the first elastic member and one end of the temperature-sensitive material are connected to the box body, and the other end of the first elastic member and the temperature-sensitive material are connected to the first current balancing plate, and the temperature-sensitive material deforms in response to temperature to drive the first current balancing plate to move relative to the box body and cause the first elastic member to expand and contract.

As an optional implementation, in an embodiment of the first aspect of the present application, the current balancing device is applied in a box body, and the current balancing device also includes a positioning plate, which extends along the diameter direction of the box body, and the two ends of the positioning plate are respectively abutted against the first current balancing plate and the box body, and the positioning plate is used to divide the first current balancing plate into at least two areas, and the at least two areas are movable relative to the second current balancing plate.

In a second aspect, the present application discloses a phase change heat storage device, comprising:

A box, a first partition, a plurality of phase change units, and a flow balancing device as described in the first aspect above, wherein the first partition is arranged in the box so that the box is divided into a first flow channel and a second flow channel in a direction from the center to the edge, the first flow balancing plate and the second flow balancing plate are located on the top of the first partition and the first flow balancing plate is spaced apart from the top of the box, the box is provided with an inlet pipe and an outlet pipe, the inlet pipe is connected to the first flow channel, the outlet pipe is directly or indirectly connected to the first flow channel and the second flow channel respectively, and the plurality of phase change units are evenly distributed in the first flow channel and the second flow channel,

The first flow balancing plate is provided with a first inner fixing hole and a first outer fixing hole at intervals, and the first inner fixed hole, the first outer fixed hole, the first inner movable hole and the first outer movable hole are arranged in sequence from the center to the edge of the box body at intervals, and the first inner fixed hole and the first outer fixed hole correspond to the first flow channel, and the first inner movable hole and the first outer movable hole correspond to the second flow channel, and the second inner through hole and the second outer through hole are provided at intervals on the second flow balancing plate, and the second inner through hole, the second outer through hole, the first inner through hole and the first outer through hole are arranged in sequence from the center to the edge of the box body at intervals, and the second inner through hole corresponds to the first inner fixed hole and is fully connected, and the second outer through hole corresponds to the first outer fixed hole and is staggered.

As an optional implementation, in an embodiment of the second aspect of the present application, the first elastic member is located on a side of the temperature-sensitive material close to the center of the box body, and a state in which no heat exchange fluid is introduced into the box body is defined as an initial state. In the initial state, the temperature-sensitive material is in an expanded and relaxed state, the first elastic member is in a relaxed state, the first inner active hole and the first inner through hole are at least partially closed, and the first outer active hole and the first outer through hole are completely connected.

As an optional embodiment, in an embodiment of the second aspect of the present application, the first flow balancing plate includes a first static flow balancing plate and a first dynamic flow balancing plate, the first static flow balancing plate is arranged corresponding to the first flow channel and the first static flow balancing plate is provided with the first inner fixed hole and the first outer fixed hole, the first dynamic flow balancing plate is arranged corresponding to the second flow channel and the first dynamic flow balancing plate is provided with the first inner movable hole and the first outer movable hole, the driving mechanism is connected to the first dynamic flow balancing plate, and the driving mechanism is used to drive the first dynamic flow balancing plate to move relative to the first static flow balancing plate.

As an optional embodiment, in an embodiment of the second aspect of the present application, the phase change heat accumulator also includes a second partition and a third partition, the second partition and the third partition are sequentially arranged between the first partition and the side wall of the box body, and the second partition is located on the side of the third partition close to the first partition, so that the first partition and the second partition are enclosed to form the second flow channel, the space from the second partition to the side wall of the box body is sequentially divided to form a third flow channel and a fourth flow channel, the third flow channel and the fourth flow channel are both provided with the phase change unit, the third flow channel and the fourth flow channel are respectively directly or indirectly connected to the outlet pipe, and the first flow equalizing plate is sequentially provided with a second inner fixed hole, a second outer fixed hole, a second inner movable hole and a second outer movable hole, the second flow balancing plate is sequentially provided with a third inner through hole, a third outer through hole, a fourth inner through hole and a fourth outer through hole, the second inner fixed hole and the second outer fixed hole correspond to the third flow channel, the second inner movable hole and the second outer movable hole correspond to the fourth flow channel, and the second inner fixed hole and the third inner through hole are arranged correspondingly and completely connected, the second outer fixed hole and the third outer through hole correspond and are arranged alternately, the driving mechanism is used to drive the first flow balancing plate to move relative to the second flow balancing plate, so that the second inner movable hole and the fourth inner through hole are completely connected or at least partially closed, and the second outer movable hole and the fourth outer through hole are completely connected or at least partially closed;

The phase change heat accumulator also includes a third flow balancing plate, which is located between the second flow balancing plate and the bottom of the box body, and the first flow channel, the second flow channel, the third flow channel and the fourth flow channel are all located between the second flow balancing plate and the third flow balancing plate. The third flow balancing plate is provided with a plurality of first flow holes, and the plurality of first flow holes respectively correspond to the first flow channel, the second flow channel, the third flow channel and the fourth flow channel, and the first flow channel is connected to the inlet pipe through the first flow hole, one end of the first partition and the third partition abuts against the second flow balancing plate, and the other ends of the first partition and the third partition extend toward the bottom of the box body, one end of the second partition abuts against the third flow balancing plate, and the other end of the second partition abuts against the top of the box body. As an optional embodiment, in an embodiment of the second aspect of the present application, the phase change heat accumulator also includes a bottom plate, which is located between the third flow equalizing plate and the bottom of the box, and the first partition plate and the end of the third partition plate away from the second flow equalizing plate are respectively abutted against the third flow equalizing plate, the bottom plate and the bottom of the box are enclosed to form a barrier flow channel, and the bottom plate is spaced apart with a second flow hole, a first movable door, a second movable door and a third movable door, the inlet pipe is abutted against the bottom plate and connected to the second flow hole, and the outlet pipe is connected to the side wall of the box and is located at Between the third flow equalizing plate and the bottom plate, the first movable door corresponds to the first flow channel and is located in the space enclosed by the first partition, the second movable door is located in the space enclosed by the first partition and the third partition, the third movable door corresponds to the fourth flow channel and is located in the space enclosed by the third partition and the side wall of the box, and the first movable door, the second movable door and the third movable door can be opened and closed respectively to connect or close the interlayer flow channel with one or more of the first flow channel, the second flow channel, the third flow channel and the fourth flow channel.

As an optional embodiment, in an embodiment of the second aspect of the present application, the phase change unit is a phase change fiber, and the diameter of the phase change fiber is in the millimeter level or less; and/or, the number of the phase change units in the second flow channel is greater than the number in the first flow channel, and the diameter of the phase change unit in the second flow channel is smaller than the diameter in the first flow channel.

As an optional embodiment, in an embodiment of the second aspect of the present application, the phase change heat accumulator also includes a water hammer mitigation device, which includes an outer shell, a positioning rod, a spiral blade, a second elastic member and an opening and closing mechanism. The outer shell is arranged at the inlet of the inlet pipe and is connected to the inlet pipe. The positioning rod, the spiral blade, the second elastic member and the opening and closing mechanism are all located in the outer shell. The positioning rod is connected to the outer shell, and one end of the positioning rod is provided with an external thread to form a threaded connection portion. The opening and closing mechanism is threadedly connected to the threaded connection portion. The two ends of the second elastic member are respectively connected to the opening and closing mechanism and the outer shell, and the second elastic member is sleeved on the outer periphery of the threaded connection portion. The spiral blade is spirally arranged around the outer periphery of the positioning rod and is connected to the opening and closing mechanism. The opening and closing mechanism is used to move along the length direction of the positioning rod under the rotation of the spiral blade so that the opening and closing mechanism is opened or closed.

As an optional embodiment, in an embodiment of the second aspect of the present application, the opening and closing mechanism includes a hollow slider, a threaded slider, a first support member, a second support member, a movable connecting member and a baffle, the hollow slider can be movably connected to the positioning rod and connected to the spiral blade, the threaded slider and the hollow slider are spaced apart and threadedly connected to the threaded connection part, and the first support member is connected to the hollow slider and extends along the length direction of the positioning rod, the second support member is connected to the threaded slider and extends along the radial direction of the positioning rod, the movable connecting member can be movably connected to the first support member and the second support member at one end away from the positioning rod, and the two ends of the baffle are respectively connected to the threaded slider and the first support member.

As an optional implementation, in an embodiment of the second aspect of the present application, the water hammer mitigation device further includes a fixing frame and a limiting member, the limiting member is installed on the inner wall of the outer shell, the fixing frame is fixed in the outer shell and abuts against the limiting member, the threaded connection portion is connected to the fixing frame, and the positioning rod, the spiral blade, the second elastic member and the opening and closing mechanism are all located in the fixing frame; and/or, the water hammer mitigation device further includes a thermal insulation layer, and the thermal insulation layer is arranged on the outer periphery of the outer shell; and/or,

The water hammer mitigation device further comprises a capillary layer, which is arranged on the inner wall of the shell and located at the front end of the spiral blade.

As an optional implementation, in an embodiment of the second aspect of the present application, the phase change heat accumulator also includes a fluid circulation device, which includes an ejector, a first branch pipe, a second branch pipe, a third branch pipe and a plurality of valves, the first branch pipe is connected to the outlet pipe, the two ends of the second branch pipe are respectively connected to the inlet pipe and the third branch pipe, and the first branch pipe and the third branch pipe are respectively connected to the inlet and outlet of the ejector, and the plurality of valves are respectively arranged on the third branch pipe and the outlet pipe.

Compared with the prior art, the beneficial effects of this application are:

An embodiment of the present application provides a flow equalizing device and a phase change heat accumulator thereof, wherein the flow equalizing device includes a first flow equalizing plate, a second flow equalizing plate and a driving mechanism. The first flow equalizing plate is arranged to be stacked on the second flow equalizing plate, and the driving mechanism is used to drive the first flow equalizing plate to move relative to the second flow equalizing plate to adjust the on-off state of the inner and outer holes of the first flow equalizing plate and the inner and outer holes of the second flow equalizing plate, and in the initial state, the inner holes and the outer holes of the first flow equalizing plate and the second flow equalizing plate have different on-off states, so that the fluid can have different flow resistances on the inner and outer sides of the first flow equalizing plate. When the flow resistance on the inner side of the first flow equalizing plate is greater than the flow resistance on the outer side, the circulation of the fluid on the inner side is restricted to drive the heat exchange fluid close to the inner side of the first flow equalizing plate to flow to the outer side to increase the flow rate on the outer side, thereby balancing the flow rates on the inner and outer sides of the first flow equalizing plate and improving the flow uniformity of the fluid on the inner and outer sides of the flow equalizing device. When the flow equalizing device is applied to the phase change heat accumulator, the heat exchange uniformity of the fluid in the same flow channel can be improved to optimize the working performance of the phase change heat accumulator.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of a phase change heat storage device disclosed in an embodiment of the present application;

FIG2 is a cross-sectional view of a phase change heat accumulator disclosed in an embodiment of the present application;

Fig. 3 is an enlarged view of point A in Fig. 2;

FIG4 is a schematic diagram of the structure of a current balancing device disclosed in an embodiment of the present application;

FIG. 5 (a) is a partial schematic diagram of the first current equalizing plate disclosed in an embodiment of the present application;

FIG. 5( b ) is a partial schematic diagram of the second current equalizing plate disclosed in an embodiment of the present application;

6 is a schematic diagram of the relative positions of the first current equalizing plate and the second current equalizing plate in an initial state according to an embodiment of the present application;

7 is a schematic diagram of the relative positions of the first flow balancing plate and the second flow balancing plate disclosed in an embodiment of the present application when the low-temperature deformed temperature-sensitive hydrogel is deformed;

FIG8 is a schematic diagram of the relative positions of the first flow balancing plate and the second flow balancing plate disclosed in an embodiment of the present application when the temperature-sensitive hydrogel deformed at high temperature is deformed;

FIG9 is a schematic diagram showing the position distribution of each flow channel and each movable door of the phase change heat accumulator;

FIG10 is a schematic diagram of the structure of a water hammer mitigation device disclosed in an embodiment of the present application;

FIG. 11 is an enlarged view of point B in FIG. 10 .

Reference numerals:

100, flow balancing device; 10, first flow balancing plate; 11, first inner movable hole; 12, first outer movable hole; 13, first inner fixed hole; 14, first outer fixed hole; 15, second inner fixed hole; 16, second outer fixed hole; 17, second inner movable hole; 18, second outer movable hole; 10a, first static flow balancing plate; 10b, first dynamic flow balancing plate; 10c, second static flow balancing plate; 10d, second dynamic flow balancing plate; 20, second flow balancing plate; 21, first inner through hole; 22, first outer through hole; 23, second inner through hole; 24, second outer through hole; 25, third inner through hole; 26, third outer through hole; 27, fourth inner through hole; 28, fourth outer through hole; 30, driving mechanism; 31, temperature-sensitive material; 32, first elastic member; 40, positioning plate;

200, phase change heat storage device; 101, box; 1011, inlet pipe; 1012, outlet pipe; 102, first partition; 103, phase change unit; 104, second partition; 105, third partition; 106, third flow plate; 1061, first flow hole; 107, bottom plate; 1070, interlayer flow channel; 1071, second flow hole; 1072, first movable door; 1073, second movable door; 1074, third movable door; 108, refrigerant pipeline; 109, water hammer elimination device; 1091, shell; 1092, positioning rod; 10921, threaded connection; 1093, spiral blade; 1094, second elastic Part; 1095, opening and closing mechanism; 10951, hollow slider; 10952, threaded slider; 10953, first support member; 10954, second support member; 10955, movable connection member; 10956, baffle; 1096, capillary layer; 1097, insulation layer; 1098, fixing frame; 1099, limit member; 110, fluid circulation device; 1101, ejector; 1102, first branch pipe; 1103, second branch pipe; 1104, third branch pipe; 1105, valve; 1106, connecting pipeline; 201, first flow channel; 202, second flow channel; 203, third flow channel; 204, fourth flow channel.

DETAILED DESCRIPTION

This section will describe in detail the specific embodiments of the present application. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

The embodiment of the present application discloses a flow balancing device, which can be applied to a phase change heat accumulator to make the flow distribution of the heat exchange fluid inside and outside the same flow channel of the phase change heat accumulator more uniform, and to make the flow distribution of each part in the same flow channel more uniform. The phase change heat accumulator includes a box, a first baffle, a plurality of phase change units and a flow balancing device.

In order to facilitate understanding of the structures of the current balancing device and the phase change heat accumulator, the current balancing device and the phase change heat accumulator will be further described below in conjunction with embodiments and drawings.

Please refer to Figures 1 to 3 together. The embodiment of the present application provides a phase change heat storage device 200, including a box body 101, a first partition 102, a plurality of phase change units 103 and a current equalizing device 100. The current equalizing device 100, the first partition 102 and the plurality of phase change units 103 are all installed in the box body 101. Specifically, please refer to Figures 4 to 6. The current equalizing device 100 includes a first current equalizing plate 10, a second current equalizing plate 20 and a driving mechanism 30. The first current equalizing plate 10 is stacked on top of the second current equalizing plate 20. The first current equalizing plate 10 is provided with a first inner movable hole 11 and a first outer movable hole 12 in sequence from the center to the edge. The second current equalizing plate 20 is provided with a first inner through hole 21 and a first outer through hole 22 in sequence from the center to the edge. The first inner through hole 21 and the first inner movable hole 11 are spaced apart from each other. The first outer through hole 22 and the first outer movable hole 12 are correspondingly arranged and have a first on-off state, and the driving mechanism 30 is connected to the first current balancing plate 10. The driving mechanism 30 is used to drive the first current balancing plate 10 to move relative to the second current balancing plate 20, so that the first on-off state and the second on-off state are switched between fully conductive (that is, the two holes overlap) or at least partially closed (that is, the two holes are partially staggered or completely staggered), and in the initial state, the first on-off state is different from the second on-off state.

In this way, the first flow equalizing plate 10 is driven to move relative to the second flow equalizing plate 20 by the driving mechanism 30 to adjust the on-off state of the inner and outer holes of the first flow equalizing plate 10 and the inner and outer holes of the second flow equalizing plate 20, and the inner and outer holes of the first flow equalizing plate 10 and the second flow equalizing plate 20 have different on-off states in the initial state, so that the heat exchange fluid can have different flow resistances on the inner and outer sides of the first flow equalizing plate 10. When the flow resistance on the inner side of the first flow equalizing plate 10 is greater than the flow resistance on the outer side, the circulation of the heat exchange fluid on the inner side is restricted to drive the heat exchange fluid close to the inner side of the first flow equalizing plate 10 to flow to the outside to increase the flow rate on the outside, thereby balancing the flow rates on the inner and outer sides of the first flow equalizing plate 10, and improving the flow uniformity of the heat exchange fluid on the inside and outside of the flow equalizing device 100. When the flow equalizing device 100 is applied to the phase change heat accumulator 200, it can improve the heat exchange uniformity of the heat exchange fluid in the same flow channel to optimize the working performance of the phase change heat accumulator 200.

Furthermore, the first partition 102 is arranged in the box body 101 to separate the box body 101 from the center to the edge to form a first flow channel 201 and a second flow channel 202. The first flow equalizing plate 10 and the second flow equalizing plate 20 are located on the top of the first partition 102, and the first flow equalizing plate 10 is spaced apart from the top of the box body 101. The box body 101 is provided with an inlet pipe 1011 and an outlet pipe 1012. The inlet pipe 1011 is connected to the first flow channel 201, and the outlet pipe 1012 is directly or indirectly connected to the first flow channel 201 and the second flow channel 202 respectively. A plurality of phase change units 103 are evenly distributed in the first flow channel 201 and the second flow channel 202. The first flow equalizing plate 10 is spaced apart from the first inner fixing hole 13 and the first outer fixing hole 14. The first inner fixing hole 13, The first outer fixed hole 14, the first inner movable hole 11 and the first outer movable hole 12 are arranged in sequence from the center to the edge of the box body 101, and the first inner fixed hole 13 and the first outer fixed hole 14 correspond to the first flow channel 201, the first inner movable hole 11 and the first outer movable hole 12 correspond to the second flow channel 202, and the second inner through hole 23 and the second outer through hole 24 are provided at intervals on the second flow equalizing plate 20, the second inner through hole 23, the second outer through hole 24, the first inner through hole 21 and the first outer through hole 22 are arranged in sequence from the center to the edge of the box body 101, and the second inner through hole 23 corresponds to the first inner fixed hole 13 and is fully connected, and the second outer through hole 24 corresponds to the first outer fixed hole 14 and is staggered.

In this way, in the first flow channel 201, the flow resistance of the outside (the side close to the edge of the box 101) increases, that is, the circulation of the heat exchange fluid on the outside is suppressed, so that the larger flow on the outside flows to the inside (the side close to the center of the box 101) to increase the flow on the inside, thereby balancing the flow inside and outside the first flow channel 201 and improving the flow uniformity of the heat exchange fluid in the first flow channel 201. In the second flow channel 202, when the heat exchange fluid is in a high flow condition, the flow on the outside is greater than the flow on the inside. At this time, by controlling the movement of the first flow equalizing plate 10 relative to the second flow equalizing plate 20, the first inner through hole 21 and the first inner movable hole 11 are completely connected, and the first outer through hole 22 and the first outer movable hole 12 are at least partially closed to suppress the flow of the heat exchange fluid from the first outer movable hole 12 into the second flow channel 202, so that the flow distribution of the heat exchange fluid inside and outside the same flow channel is more uniform, thereby improving the heat exchange uniformity of the same flow channel; in the second flow channel 202, when the heat exchange When the fluid is in a low flow condition, the flow rate on the outside is smaller than the flow rate on the inside. By controlling the movement of the first flow equalizing plate 10 relative to the second flow equalizing plate 20, the first inner movable hole 11 and the first inner through hole 21 are reduced from being fully connected to being at least partially closed, and the first outer movable hole 12 and the first outer through hole 22 are adjusted from being at least partially closed to being fully connected, so as to reduce the flow resistance on the outside of the second flow channel 202 and increase the flow resistance on the inside of the second flow channel 202, thereby adjusting the flow resistance inside and outside the flow channel according to the actual working condition of the fluid, so as to promote a more uniform flow distribution of the heat exchange fluid inside and outside the second flow channel 202. It can be seen that by adjusting the movement of the first flow equalizing plate 10 relative to the second flow equalizing plate 20, the heat exchange fluid can maintain a uniform flow distribution in the box 101 under different working flow conditions, so as to improve the charging and discharging power and the storage and discharging heat of the phase change heat accumulator 200, and optimize the working performance of the phase change heat accumulator 200.

In some embodiments, the current balancing device 100 also includes a positioning plate 40, which extends along the diameter direction of the box body 101, and the two ends of the positioning plate 40 are respectively abutted against the top of the first current balancing plate 10 and the box body 101, and the positioning plate 40 is used to divide the first current balancing plate 10 into at least two areas, and the at least two areas are movable relative to the second current balancing plate 20.

In this way, when the first inner movable hole 11 and the first inner through hole 21 of one area are completely closed, and the first outer movable hole 12 and the first outer through hole 22 are completely closed, the first inner movable hole 11 and the first inner through hole 21, the first outer movable hole 12 and the first outer through hole 22 of another area can still maintain a state of complete conduction or partial connection, so as to facilitate driving the heat exchange fluid to flow to the area where the heat exchange efficiency is low or the heat exchange is poor, so as to improve the heat exchange efficiency, realize rapid heat storage and release, improve the ratio of heat release to heat release, and make the heat exchange fluid more uniform in the circumferential distribution of the box 101, further improve the uniformity of the flow distribution of the heat exchange fluid in the box 101. At the same time, by dividing the area by the positioning plate 40, it is also possible to control whether different areas are working, so as to control the contact area between the heat exchange fluid and the phase change unit 103, so as to adjust the heat exchange energy of the heat exchange fluid in the box 101 to adapt to different heat requirements.

Exemplarily, when the heat demand is large, the first active holes (including the first inner active hole 11 and the first outer active hole 12) in all areas are connected to the first through holes (including the first inner through hole 21 and the first outer through hole 22) at the corresponding second flow channel 202, which can increase the working area, so as to increase the contact area between the heat exchange fluid and the phase change unit 103, so as to obtain greater heat exchange energy and adapt to larger heat load conditions; when the heat demand is small, the first active holes and the first through holes in individual areas are controlled to remain closed so that the heat exchange fluid cannot enter the second flow channel 202 of the area for heat exchange, thereby reducing the working area and reducing the contact area between the heat exchange fluid and the phase change unit 103 to reduce the heat exchange energy and adapt to smaller heat load conditions.

In addition, by dividing the first current balancing plate 10 into a plurality of regions, it is advantageous for the driving mechanism 30 to drive the movement of each region, thereby improving the response speed of the movement of the first current balancing plate 10 .

Optionally, the shape of the box 101 may be cylindrical, prismatic or other irregular structures, and the shapes of the first flow equalizing plate 10 and the second flow equalizing plate 20 are adapted to the cross-sectional shape in the height direction of the box 101. Exemplarily, when the shape of the box 101 is cylindrical, the first flow equalizing plate 10 and the second flow equalizing plate 20 may be circular plates to facilitate matching the shape of the box 101 and guiding the flow of the heat exchange fluid. At this time, the relative movement between the first flow equalizing plate 10 and the second flow equalizing plate 20 may be rotation or displacement.

Taking the example that the first flow equalizing plate 10 and the second flow equalizing plate 20 can be circular plates, and the driving mechanism 30 is used to drive the first flow equalizing plate 10 to rotate relative to the second flow equalizing plate 20, the number of positioning plates 40 can be two, and the two positioning plates 40 are cross-distributed so that the first flow equalizing plate 10 is divided into four sector-shaped areas, thereby being able to reduce the driving force for the rotation of the first flow equalizing plate 10 in each area, so as to facilitate the rotation of the first flow equalizing plate 10 in each area, that is, it is helpful to adjust the flow resistance of the flow channel in each area.

Optionally, each region of the first flow balancing plate 10 includes a first static flow balancing plate 10a and a first dynamic flow balancing plate 10b, the first static flow balancing plate 10a is arranged corresponding to the first flow channel 201 and the first static flow balancing plate 10a is provided with a first inner fixing hole 13 and a first outer fixing hole 14, the first dynamic flow balancing plate 10b is arranged corresponding to the second flow channel 202 and the first dynamic flow balancing plate 10b is provided with a first inner movable hole 11 and a first outer movable hole 12, and each region of the first flow balancing plate 10 is respectively configured with a driving mechanism 30, The driving mechanism 30 is connected to the first dynamic flow balancing plate 10b, and the driving mechanism 30 is used to drive the first dynamic flow balancing plate 10b to move relative to the first static flow balancing plate 10a, so as to adjust the first on-off state (i.e., the on-off state of the first inner movable hole 11 and the first inner through hole 21) and the second on-off state (i.e., the on-off state of the first outer movable hole 12 and the first outer through hole 22) to adjust the flow resistance inside and outside the second flow channel 202, which is conducive to making the flow distribution of the heat exchange fluid in the box 101 more uniform.

Please refer to Figures 6 to 8. In some embodiments, the driving mechanism 30 includes a temperature-sensitive material 31 and a first elastic member 32. The two ends of the first elastic member 32 and the temperature-sensitive material 31 are respectively connected to the dynamic flow balancing plate and the positioning plate 40. The temperature-sensitive material 31 deforms in response to temperature to drive the first flow balancing plate 10 to move relative to the second flow balancing plate 20 and cause the first elastic member 32 to expand and contract.

In this way, by utilizing the characteristic that the temperature-sensitive material 31 can deform in response to temperature changes, the storage temperature in the box 101 can be reasonably utilized, and the movement of the first flow balancing plate 10 relative to the second flow balancing plate 20 can be autonomously regulated through the temperature changes in the box 101, so as to achieve adaptive adjustment of uniform flow distribution. When the temperature-sensitive material 31 is subjected to high temperature and condenses and shrinks, it drives the moving flow balancing plate to move relative to the static flow balancing plate to adjust the first on-off state and the second on-off state, so as to increase or decrease the flow resistance inside and outside the second flow channel 202. At the same time, when the temperature-sensitive material 31 is deformed, it drives the first elastic member 32 to stretch and deform, which can provide a certain resistance to the moving flow balancing plate to limit the rotation angle or displacement stroke of the moving flow balancing plate relative to the static flow balancing plate. Through the deformation degree of the first elastic member 32 in cooperation with the temperature-sensitive material 31 at different temperatures, the rotation angle or displacement stroke of the moving flow balancing plate relative to the static flow balancing plate can be controlled to adjust the first on-off state and the second on-off state. In addition, since the first elastic member 32 has elastic restoring force when deformed, it can cooperate with the deformation of the temperature-sensitive material 31 to drive the dynamic flow averaging plate to move toward its original position relative to the static flow averaging plate, so as to facilitate restoring the first on-off state and the second on-off state to their initial states.

Optionally, the temperature-sensitive material 31 and the first elastic member 32 are arranged at intervals, and the first elastic member 32 is located on one side of the temperature-sensitive material 31 close to the center of the box body 101. The state in which no heat exchange fluid is introduced into the box body 101 is defined as the initial state. In the initial state, the temperature-sensitive material 31 is in an expanded and relaxed state, the first elastic member 32 is in a relaxed state (i.e., a state in which it is not subjected to external force and there is no compression deformation), the first inner movable hole 11 and the first inner through hole 21 are at least partially closed, and the first outer movable hole 12 and the first outer through hole 22 are completely connected (i.e., completely overlap or approximately overlap).

In this way, the temperature-sensitive material 31 is more affected by the temperature of the heat exchange fluid flowing through the first outer active hole 12, while the temperature of the heat exchange fluid flowing through the first inner active hole 11 has less influence on the temperature-sensitive material 31, so that the flow equalizing device 100 can be used for adaptive adjustment of high flow conditions and low flow conditions, thereby being able to adapt to heat exchange fluids under different conditions and improving the uniformity of flow distribution.

Optionally, referring to Figure 6, the embodiment of the present application takes the initial state in which the first inner active hole 11 is partially staggered with the first inner through hole 21, and the first outer active hole 12 is completely connected with the first outer through hole 22 as an example, so that it can adapt to heat exchange fluids under different working conditions, so that under different flow and temperature conditions, the phase change heat accumulator 200 can autonomously regulate the flow distribution inside and outside the same flow channel to improve the uniformity of the flow distribution.

In some embodiments, the temperature-sensitive material 31 may be a temperature-sensitive hydrogel, which is used to deform under the temperature of the heat exchange fluid to drive the dynamic flow balancing plate to move.

In this way, the property of the thermosensitive hydrogel that can undergo reversible deformation with temperature can be used to adapt to changes in temperature in the box 101 to achieve autonomous regulation of uniform flow distribution.

Optionally, the thermosensitive material 31 includes a plurality of thermosensitive hydrogels with different deformation temperatures. Taking the process of heating the box 101 as an example, when the box 101 is heated to a certain temperature, the thermosensitive hydrogel that deforms at low temperature can deform first, so as to drive the moving flow equalizing plate to move relative to the static flow equalizing plate while compressing the first elastic member 32, so that the first inner movable hole 11 is completely connected with the first inner through hole 21, and the first outer movable hole 12 is partially staggered with the first outer through hole 22, so as to drive the heat exchange fluid to flow inward, so as to improve the uniformity of flow distribution; when the box 101 After the internal heat charging is completed, the temperature-sensitive hydrogel that deforms at high temperature also deforms to drive the dynamic flow averaging plate to move relative to the static flow averaging plate and further compress the first elastic member 32, so that the first inner movable hole 11 and the first inner through hole 21, and the first outer movable hole 12 and the first outer through hole 22 are completely closed to close the flow area of the second flow channel 202 in this area, thereby driving the heat exchange fluid to flow to another area where the heat charging is not completed, so as to improve the heat exchange efficiency and the amount of heat charged and released, and realize adaptive regulation of heat exchange.

Optionally, multiple thermosensitive hydrogels are formed together by layer-by-layer polymerization or sequential coating of pre-gel solutions, followed by photo-crosslinking. When stimulated by temperature, the shape change of one layer of the thermosensitive hydrogel is constrained by another layer, and the forces on the two layers are in opposite directions, so that the hydrogel bends to release internal stress.

Optionally, the temperature-sensitive hydrogel may be a temperature-sensitive hydrogel such as -isopropylacrylamide or a derivative of -isopropylacrylamide, etc.

It is understandable that in other embodiments, the temperature-sensitive material 31 may also be a temperature-sensitive memory alloy such as a nickel-titanium-based, copper-based or iron-based alloy. Alternatively, the drive mechanism 30 may also be gear-driven, but this drive mode needs to be regulated by external input (such as an electrical signal, etc.). Although the regulation is flexible, it cannot adaptively regulate the flow distribution and needs to cooperate with other mechanisms for regulation. There may be hysteresis. For example, the drive mechanism 30 may include a gear connected to a motor, and teeth are provided on the outer side of the dynamic flow balancing plate. The gear of the drive mechanism 30 is meshed with the teeth of the dynamic flow balancing plate, and the gear is driven by the motor to rotate, so as to drive the dynamic flow balancing plate to rotate relative to the static flow balancing plate.

Please refer to Figures 1 to 4 again. In some embodiments, the phase change heat accumulator 200 also includes a second partition 104 and a third partition 105. The second partition 104 and the third partition 105 are sequentially spaced between the first partition 102 and the side wall of the box body 101, and the second partition 104 is located on the side of the third partition 105 close to the first partition 102, so that the first partition 102 and the second partition 104 are enclosed to form a second flow channel 202, and the space from the second partition 104 to the side wall of the box body 101 is sequentially divided to form a third flow channel 203 and a fourth flow channel 204. The third flow channel 203 and the fourth flow channel 204 are both provided with a phase change unit 103. The third flow channel 203 is indirectly connected to the outlet pipe 1012, and the fourth flow channel 204 is directly connected to the outlet pipe 1012. In the direction from the first outer active hole 12 to the edge of the first flow equalizing plate 10, the first flow equalizing plate 10 is sequentially spaced with a second The inner fixed hole 15, the second outer fixed hole 16, the second inner movable hole 17 and the second outer movable hole 18, the second flow balancing plate 20 is sequentially provided with the third inner through hole 25, the third outer through hole 26, the fourth inner through hole 27 and the fourth outer through hole 28, the second inner fixed hole 15 and the second outer fixed hole 16 correspond to the third flow channel 203, the second inner movable hole 17 and the second outer movable hole 18 correspond to the fourth flow channel 204, and the second inner fixed hole 15 and the third inner through hole 25 are arranged correspondingly and completely connected, the second outer fixed hole 16 and the third outer through hole 26 correspond and are arranged alternately, the driving mechanism 30 is used to drive the first flow balancing plate 10 to move relative to the second flow balancing plate 20, so that the second inner movable hole 17 and the fourth inner through hole 27 are completely connected or at least partially closed, and the second outer movable hole 18 and the fourth outer through hole 28 are completely connected or at least partially closed. The phase change heat storage device 200 further includes a third flow balancing plate 106, which is located between the second flow balancing plate 20 and the bottom of the box 101. The first flow channel 201, the second flow channel 202, the third flow channel 203 and the fourth flow channel 204 are all located between the second flow balancing plate 20 and the third flow balancing plate 106. The third flow balancing plate 106 is provided with a plurality of first flow holes 1061, which respectively correspond to the first flow channel 201, the second flow channel 202, the third flow channel 203 and the fourth flow channel 204. 02, the third flow channel 203 and the fourth flow channel 204, and the first flow channel 201 is connected to the inlet pipe 1011 through the first flow hole 1061, one end of the first partition plate 102 and the third partition plate 105 abuts against the second flow equalizing plate 20, and the other end of the first partition plate 102 and the third partition plate 105 extends toward the bottom of the box body 101, one end of the second partition plate 104 abuts against the third flow equalizing plate 106, and the other end of the second partition plate 104 abuts against the top of the box body 101.

In this way, by controlling the relative rotation of the first flow equalizing plate 10 and the second flow equalizing plate 20, the second inner active hole 17 and the second outer active hole 18 are respectively switched with the fourth inner through hole 27 and the fourth outer through hole 28 between a fully conductive state and an at least partially closed state, so as to control the flow rate of the heat exchange fluid in multiple flow channels, thereby facilitating the uniformity of the flow rate of the heat exchange fluid in multiple flow channels and improving the heat exchange efficiency and heat storage and release between the heat exchange fluid and the phase change unit 103 in the flow channel. At the same time, as the number of flow channels through which the heat exchange fluid flows increases, the energy (temperature) change of the heat exchange fluid before and after the heat exchange increases, the heat exchange efficiency increases, and the heat storage and release amount of the phase change unit 103 increases. By controlling the on/off states of the first inner active hole 11, the first outer active hole 12, the second inner active hole 17, and the second outer active hole 18 and the first inner through hole 21, the first outer through hole 22, the fourth inner through hole 27, and the fourth outer through hole 28 respectively, the number of flow channels through which the heat exchange fluid flows can also be controlled to control the energy of heat exchange between the heat exchange fluid and the phase change unit 103, thereby being able to adjust the heat charge and release amount of the phase change heat accumulator 200 to adapt to different heat requirements.

It should be noted that, from the above, it can be seen that the first flow equalizing plate 10 at the third flow channel 203 and the fourth flow channel 204 is also divided by the positioning plate 40 to form multiple areas, and the first flow equalizing plate 10 also includes a second static flow equalizing plate 10c and a second dynamic flow equalizing plate 10d. The second static flow equalizing plate 10c is arranged corresponding to the third flow channel 203, and the second dynamic flow equalizing plate 10d is arranged corresponding to the fourth flow channel 204. The second dynamic flow equalizing plate 10d is driven by the driving mechanism 30 to rotate relative to the second static flow equalizing plate 10c, the second inner movable hole 17 and the second outer movable hole 18 are arranged on the second dynamic flow equalizing plate 10d, the second inner fixed hole 15 and the second outer fixed hole 16 are arranged on the second static flow equalizing plate 10c, and the second inner movable hole 17 is located on the side close to the second static flow equalizing plate 10c, and the second outer movable hole 18 is located on the side away from the second static flow equalizing plate 10c. The on-off state switching, implementation mechanism and adjustment process of the second inner movable hole 17, the second outer movable hole 18 and the fourth inner through hole 27, the fourth outer through hole 28 are consistent with the on-off state switching, implementation mechanism and adjustment process of the first inner movable hole 11, the first outer movable hole 12 and the first inner through hole 21, the first outer through hole 22. Specific reference is made to the settings of the first inner movable hole 11 and the first outer movable hole 12, which will not be repeated here.

Please combine Figures 2 and 9. Optionally, the phase change heat accumulator 200 also includes a bottom plate 107, which is located between the third flow equalizing plate 106 and the bottom of the box body 101, and the ends of the first partition plate 102 and the third partition plate 105 away from the second flow equalizing plate 20 are respectively abutted against the third flow equalizing plate 106. The bottom plate 107 and the bottom of the box body 101 are enclosed to form an interlayer flow channel 1070. The bottom plate 107 is provided with second flow holes 1071 and a plurality of movable doors at intervals. The inlet pipe 1011 abuts against the bottom plate 107 and is connected to the second flow holes 1071. The outlet pipe 1012 is passed through the side wall of the box body 101 and is installed between the third flow equalizing plate 106 and the bottom plate 107. The plurality of movable doors can be opened and closed to connect or close the interlayer flow channel 1070 with one or more of the first flow channel 201, the second flow channel 202, the third flow channel 203 and the fourth flow channel 204.

In this way, a channel is formed between the bottom plate 107 and the third flow equalizing plate 106 for the heat exchange fluid to switch between multiple flow channels. When the first movable hole (including the first inner movable hole 11 and the first outer movable hole 12) is connected to the first through hole (including the first inner through hole 21 and the first outer through hole 22), the second movable hole (the second inner movable hole 17 and the second outer movable hole 18) is connected to the fourth through hole (including the fourth inner through hole 27 and the fourth outer through hole 28), and the multiple movable doors are closed, the heat exchange fluid enters the box body 101 through the inlet pipe 1011, flows through the second flow hole 1071 and the first flow hole 1061 in turn, enters the first flow channel 201, and after heat exchange with the phase change unit 103 in the first flow channel 201, it flows through the second through hole (including the second inner through hole 23 and the second outer through hole 24), the first fixed hole (including the first inner fixed hole 13 and the first outer fixed hole 14) in turn. , the first movable hole, the first through hole (including the first inner through hole 21 and the first outer through hole 22) enter the second flow channel 202, after heat exchange with the phase change unit 103 in the second flow channel 202, enter the space between the bottom plate 107 and the third current equalizing plate 106 through the first flow hole 1061, and then enter the third flow channel 203 through the first flow hole 1061, after heat exchange with the phase change unit 103 in the third flow channel 203, enter the fourth flow channel 204 through the third through hole (including the third inner through hole 25 and the third outer through hole 26), the second fixed hole (including the second inner fixed hole 15 and the second outer fixed hole 16), the second movable hole and the fourth through hole (including the fourth inner through hole 27 and the fourth outer through hole 28), after heat exchange with the phase change unit 103 in the fourth flow channel 204, flow through the first flow hole 1061 and the outlet pipe 1012 in sequence and flow out of the box body 101.

By setting the bottom plate 107 and multiple movable doors, on the one hand, when the first through hole and the fourth through hole are completely closed with the first movable hole or the second movable hole, respectively, the heat exchange fluid can flow to the outlet pipe 1012 through the interlayer flow channel 1070 and the movable door, that is, when the second flow channel 202 or the fourth flow channel 204 has a large flow resistance, the heat exchange fluid can exchange heat in other flow channels and flow out of the outlet pipe 1012, so as to facilitate the selection and control of the heat exchange flow channel, thereby facilitating the adjustment of the heat exchange efficiency and the charge and discharge of heat, meeting different heat requirements, and adapting to different heat scenarios. On the other hand, the interlayer flow channel 1070 can also be used to assist in the discharge of condensed water when the heat exchange fluid is steam, so as to facilitate the recycling of the heat exchange fluid.

Exemplarily, when the heat demand temperature is high, the first through hole and the fourth through hole are controlled to be connected to the first movable hole and the second movable hole respectively, so that the heat exchange fluid flows through the first flow channel 201, the second flow channel 202, the third flow channel 203 and the fourth flow channel 204 in sequence. At this time, the number of flow channels through which the heat exchange fluid passes is the largest, and the heat exchange temperature is the highest; when the heat demand temperature is low, the first through hole and the first movable hole are controlled to be closed, or the fourth through hole and the second movable hole are controlled to be closed, so that the heat exchange fluid only flows through the first flow channel 201 and the second flow channel 202, or the heat exchange fluid only flows through the third flow channel 203 and the fourth flow channel 204. At this time, the number of flow channels through which the heat exchange fluid flows is the smallest, and the heat exchange temperature is the lowest.

Optionally, the movable door includes a first movable door 1072, a second movable door 1073 and a third movable door 1074, the first movable door 1072 corresponds to the first flow channel 201 and is located in the space enclosed by the first partition 102, the second movable door 1073 is located in the space enclosed by the first partition 102 and the third partition 105, and the third movable door 1074 corresponds to the fourth flow channel 204 and is located in the space enclosed by the third partition 105 and the side wall of the box body 101. By controlling the opening and closing of each movable door, it is convenient to guide the heat exchange fluid into different flow channels to achieve different heat requirements.

Exemplarily, when the first movable hole and the first through hole are completely closed, the third movable door 1074 is closed, and the heat exchange fluid flowing out of the first channel 201 through the second through hole and the first fixed hole cannot enter the second channel 202, forcing the heat exchange fluid to enter the interlayer channel 1070 through the first channel 201 and the first movable door 1072, and pass through the third channel 203 and the fourth channel 204 in sequence through the second movable door 1073, and finally flow out of the box body 101 through the outlet pipe 1012. That is to say, after the heat exchange fluid enters the box body 101 through the inlet pipe 1011, it passes through the first movable door 1072, the interlayer channel 1070, the second movable door 1073, the third channel 203, the fourth channel 204 and the outlet pipe 1012 in sequence, and the heat exchange fluid only exchanges heat through the third channel 203 and the fourth channel 204. When the second movable hole and the fourth through hole are completely closed, the heat exchange fluid flowing out of the third channel 203 through the third through hole and the second fixed hole cannot enter the fourth channel 204, forcing the heat exchange fluid to enter the interlayer channel 1070 through the first channel 201, the second channel 202 and the second movable door 1073, and flow out of the box body 101 through the third movable door 1074 and the outlet pipe 1012 in turn. That is to say, after the heat exchange fluid passes through the first channel 201 and the second channel 202, it passes through the second movable door 1073, the interlayer channel 1070, the third movable door 1074 and the outlet pipe 1012 in turn to flow out of the box body 101, and the heat exchange fluid only exchanges heat through the phase change unit 103 in the first channel 201 and the second channel 202.

Please refer to FIG. 6 to FIG. 8 together. For ease of reading and understanding, the relative movement process of the first current equalizing plate 10 and the second current equalizing plate 20 when the phase change heat storage device 200 is charged with heat is described below:

When the heating of one of the areas in the same flow channel is completed, the first moving flow plate 10b and the second moving flow plate 10d in the area are controlled to rotate relative to the first static flow plate 10a and the second static flow plate 10c, so as to force the heat exchange fluid to flow to the remaining areas in the same flow channel. As can be seen from the above, the temperature-sensitive hydrogel is composed of a plurality of temperature-sensitive hydrogel strips with different deformation temperatures. Taking the heat storage temperature of 58°C as an example, the temperature-sensitive hydrogel can be composed of temperature-sensitive hydrogel strips with two deformation temperatures of 30°C-40°C and 45°C-55°C. Taking the heat exchange fluid flowing from the third flow channel 203 to the fourth flow channel 204 as an example, the side of the moving flow plate close to the first flow channel 201 is defined as the inner side, and the side close to the side wall of the box body 101 is defined as the outer side. As shown in Figure 6, in the initial state, the second inner movable hole 17 is partially staggered with the fourth inner through hole 27, and the second outer movable hole 18 is completely or substantially connected with the fourth outer through hole 28. It can be known from practice that when in a high flow condition, in the fourth flow channel 204, the outer flow is larger and the inner flow is smaller. Therefore, the phase change unit 103 close to the outer side of the fourth flow channel 204 completes the heat exchange faster, and the heat exchange fluid temperature outside the fourth flow channel 204 is higher. If the heat storage temperature is 58°C as an example, the temperature-sensitive hydrogel of 30°C-40°C will first deform and shrink, but due to the resistance provided by the first elastic member 32, the dynamic flow plate can only rotate a little, so that the second inner active hole 17 is connected to the fourth inner through hole 27, and the second outer active hole 18 is partially staggered with the fourth outer through hole 28 (as shown in Figure 7), so that the flow resistance outside the fourth flow channel 204 is increased and the flow rate is reduced. When a certain area in the flow channel is fully charged, the temperature-sensitive hydrogel at 45°C-55°C also deforms and shrinks, causing the first elastic member 32 to continue to compress, and the dynamic flow averaging plate is completely rotated to the maximum rotatable angle, so that the second inner active hole 17 and the second outer active hole 18 are completely closed with the fourth inner through hole 27 and the fourth outer through hole 28 respectively (as shown in Figure 8), so that the flow area of the area is reduced to 0, forcing the heat exchange fluid to flow to the remaining areas in the same circle of flow channels that have not been fully charged, thereby achieving the purpose of adaptive regulation; when in a low flow condition, the outer flow in the fourth flow channel 204 is small, and the inner flow is large, so the dynamic flow averaging plate maintains its initial position unchanged (that is, the second inner active hole 17 and the fourth outer through hole 28 are completely closed). The fourth inner through hole 27 is partially staggered, and the second outer active hole 18 is completely or roughly connected with the fourth outer through hole 28, so that the flow resistance inside the fourth flow channel 204 increases and the flow rate decreases. Similarly, when a certain area in the flow channel is fully heated, the temperature-sensitive hydrogels of 30°C-40°C and 45°C-55°C also deform and shrink, so that the first elastic member 32 continues to be compressed, and the dynamic flow averaging plate is completely rotated to the maximum rotatable angle, so that the second inner active hole 17 and the second outer active hole 18 are completely closed with the fourth inner through hole 27 and the fourth outer through hole 28 respectively, so that the flow area of the area is reduced to 0, forcing the heat exchange fluid to flow to the remaining areas in the same circle of flow channels that have not been fully heated, thereby achieving the purpose of adaptive regulation.

When the heating of the first flow channel 201 and the second flow channel 202 in the same flow channel is completed, the rotation of the dynamic flow plate relative to the static flow plate and the cooperation of the interlayer flow channel 1070 and multiple movable doors can force the heat exchange fluid not to flow into the first flow channel 201 and the second flow channel 202, but to flow into the third flow channel 203 and the fourth flow channel 204, so as to reduce the distance the heat exchange fluid flows, reduce flow resistance, and save pump work. In this case, the first movable hole and the first through hole are completely staggered and closed, so that the heat exchange fluid cannot pass through here. Open the first movable door 1072 and the second movable door 1073, and close the third movable door 1074. At this time, the fluid is forced to flow in from the first movable door 1072, flow through the interlayer flow channel 1070, and flow out from the second movable door 1073. After passing through the third flow channel 203 and the fourth flow channel 204 in turn, it flows out from the outlet pipe 1012.

Please refer to Figures 1 and 2 again. In some embodiments, considering that the phase change material of the packed bed phase change heat accumulator 200 in the prior art is encapsulated into capsules, the size of these capsules is relatively thick, and the thermal conductivity resistance of the phase change material inside the capsule is relatively large, resulting in low heat exchange efficiency between the phase change material and the external heat exchange fluid, and the phase change material at the center of the capsule cannot be fully charged and released, so that the heat storage and release power and heat storage and release of the phase change material are insufficient. Based on this, the phase change unit 103 is a phase change fiber, and the diameter of the phase change fiber is millimeter-level or less. Thereby, the diameter of the phase change unit 103 can be reduced, the radial heat transfer resistance can be reduced, the heat exchange rate between the phase change material and the heat exchange fluid can be increased, and the ratio of the heat release to the heat charge of the phase change unit 103 can be increased.

Optionally, considering that when the heat exchange fluid flows close to the outlet pipe 1012, there may be a problem of heat transfer deterioration due to the decrease in the temperature difference between the heat exchange fluid and the outside, based on this, the number of phase change units 103 in the second flow channel 202 is greater than the number in the first flow channel 201, and the diameter of the phase change unit 103 in the second flow channel 202 is smaller than the diameter in the first flow channel 201. In this way, the area of the phase change material can be gradually increased along with the flow direction of the heat exchange fluid, so that the heat exchange area between the heat exchange fluid and the phase change unit 103 in the second flow channel 202 is greater than the heat exchange area in the first flow channel 201, which is conducive to ensuring the heat exchange effect and heat exchange amount of the heat exchange fluid in each flow channel of the box 101.

Similarly, the number of phase change units 103 in the fourth flow channel 204 is greater than that in the third flow channel 203, the number of phase change units 103 in the third flow channel 203 is greater than that in the second flow channel 202, and the diameter of the phase change unit 103 in the fourth flow channel 204 is smaller than that in the third flow channel 203, and the diameter of the phase change unit 103 in the third flow channel 203 is smaller than that in the second flow channel 202. Thus, the heat exchange effect of the heat exchange fluid in each flow channel of the box body 101 can be ensured.

Optionally, the phase change fiber can be a phase change material fiber of millimeter size or below prepared by electrospinning, microcapsule melt spinning, (phase change material) composite spinning or fiber hollow filling method, and the internal phase change material can be various organic or inorganic phase change materials.

In some embodiments, the phase change heat storage device 200 further includes a plurality of refrigerant pipes 108 filled with refrigerant, the refrigerant pipes 108 are arranged around the circumference of the box body 101, and the plurality of refrigerant pipes 108 are respectively located in the first flow channel 201, the second flow channel 202, the third flow channel 203, and the fourth flow channel 204. This can facilitate heat conduction and improve heat exchange efficiency.

Please refer to Figures 1, 10 and 11. In some embodiments, considering that water hammer usually occurs during water supply, common water hammers include condensation water hammer when steam is used as the heat exchange fluid and water hammer when water or other liquids are used as the heat exchange fluid. Condensation water hammer occurs because condensed water is driven by high-speed steam to form water bombs, which separate the steam into independent bubbles. The steam in the area where the independent bubbles are located is cooled and condensed quickly, forming a negative pressure or vacuum state. The upstream and downstream water flows are instantly accelerated to flow to the negative pressure area, causing huge pressure fluctuations, that is, condensation water hammer occurs. When water or other liquids are used as heat exchange fluids, water hammer occurs in a closed pipeline system, causing large pressure fluctuations and vibrations when the fluid flow rate changes too quickly, such as when the pump is turned on, stopped, or when the valve 1105 is turned on and off. Since the phase change material has a small diameter and weak impact resistance, it is easy to be damaged when it is impacted by water hammer, resulting in problems such as the structure of the phase change heat accumulator 200 being destroyed, the material of the phase change unit 103 leaking, and the heat storage and release performance being reduced. Based on this, the phase change heat accumulator 200 also includes a water hammer elimination device 109, which includes a shell 1091, a positioning rod 1092, a spiral blade 1093, a second elastic member 1094 and an opening and closing mechanism 1095. The shell 1091 is arranged at the entrance of the inlet pipe 1011 and is connected to the inlet pipe 1011. The positioning rod 1092, the spiral blade 1093, the second elastic member 1094 and the opening and closing mechanism 1095 are all located in the shell 1091. The positioning rod 1092 is connected to the shell 1091, and one end of the positioning rod 1092 is provided with an external thread to A threaded connection portion 10921 is formed, and an opening and closing mechanism 1095 is threadedly connected to the threaded connection portion 10921. Two ends of the second elastic member 1094 are respectively connected to the opening and closing mechanism 1095 and the outer shell 1091, and the second elastic member 1094 is sleeved on the outer periphery of the threaded connection portion 10921. The spiral blade 1093 is spirally wound around the outer periphery of the positioning rod 1092 and connected to the opening and closing mechanism 1095. The opening and closing mechanism 1095 is used to move along the length direction of the positioning rod 1092 under the rotation of the spiral blade 1093, so that the opening and closing mechanism 1095 is opened or closed.

In this way, the spiral blades 1093 stir the heat exchange fluid so that the large bubbles that form the water hammer are broken into multiple small bubbles by the rotating spiral blades 1093, so as to destroy the water hammer that occurs when the heat exchange fluid is steam. At the same time, by providing an openable and closable opening and closing mechanism 1095, when a water hammer impact occurs, the water hammer causes the spiral blades 1093 to rotate and drives the opening and closing mechanism 1095 to move along the threaded connection part 10921, so that the opening and closing mechanism 1095 opens to block and destroy the water hammer that occurs when the heat exchange fluid is liquid, thereby effectively avoiding the water hammer impact from being transmitted to the box body 101. It can be seen that the water hammer mitigation device 109 provided in the present application can eliminate various types of water hammers to adapt to different usage scenarios and working conditions.

Optionally, the water hammer dissipation device 109 further includes a capillary layer 1096, which is arranged on the inner wall of the housing 1091 and located at the front end of the spiral blade 1093, that is, the heat exchange fluid needs to flow through the capillary layer 1096, the spiral blade 1093, and the opening and closing mechanism 1095 in sequence before entering the inlet pipe 1011. Thus, the condensed water can be guided to be discharged from the water hammer dissipation device 109 to reduce the amount of condensed water in the pipeline, which is conducive to destroying the conditions for forming water hammer, reducing the probability and severity of water hammer, and thus protecting the phase change unit 103 inside the box 101.

Optionally, the shape of the capillary layer 1096 may be concave, mesh, sintered metal powder or fiber, etc., which can be set according to actual needs and is not limited here.

Optionally, the water hammer mitigation device 109 further includes a heat-insulating layer 1097, which is disposed on the outer periphery of the housing 1091. This can achieve the effect of heat insulation, reduce the generation of condensed water, and avoid a large amount of condensation of steam at the inlet of the inlet pipe 1011, so as to further avoid the occurrence of water hammer.

In some embodiments, the opening and closing mechanism 1095 includes a hollow slider 10951, a threaded slider 10952, a first support member 10953, a second support member 10954, a movable connecting member 10955 and a baffle 10956, the hollow slider 10951 can be movably connected to the positioning rod 1092 and connected to the spiral blade 1093, the threaded slider 10952 is spaced apart from the hollow slider 10951 and is threadedly connected to the threaded connecting portion 10921, and the first support member 10953 is connected to the second support member 10954, and the movable connecting member 10955 is connected to the second support member 10954. Component 10953 is connected to the hollow slider 10951 and extends along the length direction of the positioning rod 1092, the second support component 10954 is connected to the threaded slider 10952 and extends radially along the positioning rod 1092, the movable connecting component 10955 can be movably connected to the first support component 10953 and the second support component 10954 at one end away from the positioning rod 1092, and the two ends of the baffle 10956 are respectively connected to the threaded slider 10952 and the first support component 10953.

In this way, the spiral blade 1093 is driven to rotate by the hollow slider 10951, so that the spiral blade 1093 can break large bubbles during the rotation process to reduce the probability and severity of water hammer, and the baffle 10956 and the second support member 10954 are driven to move along the length direction of the positioning rod 1092 by the threaded slider 10952 to adjust the opening and closing degree of the baffle 10956 relative to the positioning rod 1092, so that the water hammer elimination device 109 can adapt to different conditions of the heat exchange fluid. When water hammer is formed, the heat exchange fluid rotates through the spiral blade 1093. The second elastic member 1094 drives the threaded slider 10952 to move in the direction of the spiral blade 1093 to drive the baffle 10956 to close, so that the opening area of the baffle 10956 in the water hammer dissipation device 109 is reduced, so that the heat exchange fluid can normally pass through the water hammer dissipation device 109 and enter the inlet pipe 1011, which is beneficial to the supply of the heat exchange fluid to the box 101. In addition, by arranging the second support member 10954 to support the first support member 10953, it is possible to provide a supporting force for the first support member 10953, which is beneficial to improving the structural stability of the first support member 10953, ensuring the blocking effect of the opening and closing mechanism 1095, and avoiding the situation where the first support member 10953 drives the baffle 10956 to fold or shrink and close under the flow of the heat exchange fluid.

Optionally, the water hammer mitigation device 109 further includes a fixing frame 1098 and a stopper 1099, the stopper 1099 is mounted on the inner wall of the housing 1091, the fixing frame 1098 is fixed in the housing 1091 and abuts against the stopper 1099, the threaded connection portion 10921 is connected to the fixing frame 1098, and the positioning rod 1092, the spiral blade 1093, the second elastic member 1094 and the opening and closing mechanism 1095 are all located in the fixing frame 1098. By providing the stopper 1099 to limit the displacement of the fixing frame 1098 and fix the fixing hole in the housing 1091, it is possible to avoid the situation where the fixing hole moves and displaces in the direction of the inlet pipe 1011 under the impact force of the water hammer, thereby affecting the water hammer damage effect.

Optionally, the baffle 10956 may be a foldable plastic film or metal sheet, etc., so as to facilitate adapting to different working conditions of the water hammer mitigation device 109 and ensure the reliability of the baffle 10956.

Please refer to FIG. 1 again. In some embodiments, considering that the phase change heat accumulator 200 in the prior art directly discharges the heat exchange fluid from the box 101 after the heat exchange fluid exchanges heat with the flow channel once, and the temperature of the heat exchange fluid at this time is still higher than the phase change temperature, heat waste will be caused, resulting in a low heat utilization rate of the heat exchange fluid and a low heat storage power of the phase change heat accumulator 200. Based on this, the phase change heat accumulator 200 also includes a fluid circulation device 110, and the fluid circulation device 110 includes an ejector 1101, a first A branch pipe 1102, a second branch pipe 1103, a third branch pipe 1104 and a plurality of valves 1105, the first branch pipe 1102 is connected to the outlet pipe 1012 through the interlayer flow channel 1070, the two ends of the second branch pipe 1103 are respectively connected to the inlet pipe 1011 and the third branch pipe 1104, and the first branch pipe 1102 and the third branch pipe 1104 are respectively connected to the inlet and outlet of the injector 1101, and a plurality of valves 1105 are respectively arranged on the third branch pipe 1104 and the outlet pipe 1012.

The heat exchange fluid that should be at the outlet pipe 1012 is sucked out by the ejector 1101, and through the cooperation of the valve 1105 and a plurality of branch pipes, the heat exchange fluid is allowed to re-enter the box body 101 for circulation, so as to realize multiple recycling of heat, thereby improving the heat utilization rate and the heat storage power.

When the fluid circulation device 110 is working, the valves 1105 on the outlet pipe 1012 and the third branch pipe 1104 are first closed, and the heat exchange fluid at the outlet pipe 1012 is sucked through the ejector 1101, so that the heat exchange fluid enters the ejector 1101 through the third movable door 1074, the interlayer flow channel 1070, and the first branch pipe 1102 in sequence, and enters the inlet pipe 1011 through the outlet of the ejector 1101, the third branch pipe 1104 and the second branch pipe 1103, so that the heat exchange fluid after one cycle can enter the box 101 again for a new cycle.

Optionally, the first branch pipe 1102 and the second branch pipe 1103 are also provided with valves 1105 , which can help improve the working reliability of the fluid circulation device 110 to ensure the operating reliability of the phase change box 101 .

Optionally, the fluid circulation device 110 further includes a connecting pipe 1106, which is connected to the housing 1091 of the water hammer mitigation device 109 and the inlet of the fluid circulation device 110, and the connecting pipe 1106 is also provided with a valve 1105. The condensed water in the water hammer mitigation device 109 can be absorbed by the fluid circulation device 110 and discharged through the outlet of the third branch pipe 1104, thereby facilitating the reduction of the condensed water in the water hammer mitigation device 109.

For ease of reading and understanding, the following simple example is used to illustrate the working process of the phase change heat storage device 200 in conjunction with the accompanying drawings.

The operation process of the phase change heat storage device 200 during heat charging includes the following situations:

(1) When the heat exchange fluid is liquid, if fluid circulation is not performed, the valves 1105 on the connecting pipe 1106, the first branch pipe 1102, the second branch pipe 1103, and the third branch pipe 1104 are kept closed, the first movable door 1072, the second movable door 1073, and the third movable door 1074 are closed, and the valve 1105 at the outlet pipe 1012 is opened. When the heat exchange fluid is introduced, the heat exchange fluid first passes through the water hammer mitigation device 109 and the inlet pipe 1011. After the heat exchange fluid is evenly divided by the third flow equalizing plate 106, it flows through the first flow channel 201, the first through hole of the second flow equalizing plate 20 and the first fixed hole of the first flow equalizing plate 10 in sequence. Then the heat exchange fluid turns and passes through the first movable hole of the first flow equalizing plate 10 and the first through hole of the second flow equalizing plate 20 again to flow into the second flow channel 202. After the heat exchange fluid flows out of the second flow channel 202 through the first flow hole 1061 on the third flow equalizing plate 106, it turns again through the bottom plate 107 and enters the third flow channel 203, and flows through the first through hole of the second flow equalizing plate 20 and the second fixed hole of the first flow equalizing plate 10 in sequence. Then the heat exchange fluid turns and passes through the second movable hole of the first flow equalizing plate 10 and the first through hole of the first flow equalizing plate 10 again to enter the fourth flow channel 204, and finally flows out through the first flow hole 1061 of the third flow equalizing plate 106 and the outlet pipe 1012.

(2) When the heat exchange fluid is steam, if fluid circulation is not performed, the valves 1105 on the outlet pipe 1012, the connecting pipe 1106, the first branch pipe 1102, and the third branch pipe 1104 are opened, the first movable door 1072, the second movable door 1073, and the third movable door 1074 are opened, and the valve 1105 on the second branch pipe 1103 is closed. The flow direction of the heat exchange fluid and the structure through which the heat exchange fluid flows are the same as those when the heat exchange fluid is liquid and fluid circulation is not performed. When the heat exchange fluid is introduced, the heat exchange fluid first passes through the water hammer elimination device 109 and the inlet pipe 1011. After the heat exchange fluid passes through the third flow equalizing plate 106 to evenly divide the flow, it flows through the first flow channel 201, the second through hole of the second flow equalizing plate 20 and the first fixed hole of the first flow equalizing plate 10 in sequence. Then, the heat exchange fluid turns and passes through the first movable hole of the first flow equalizing plate 10 and the first through hole of the second flow equalizing plate 20 again to flow into the second flow channel 202. The heat exchange fluid passes through the first through hole on the third flow equalizing plate 106. After flowing out of the second flow channel 202 through the flow hole 1061, it turns again through the bottom plate 107 and enters the third flow channel 203, and flows out of the third flow channel 203 through the third through hole of the second flow equalizing plate 20 and the second fixed hole of the first flow equalizing plate 10 in sequence, and then the heat exchange fluid turns again and passes through the second movable hole of the first flow equalizing plate 10 and the fourth through hole of the first flow equalizing plate 10 to enter the fourth flow channel 204, and finally flows out through the first flow hole 1061 of the third flow equalizing plate 106 and the outlet pipe 1012.

However, when the heat exchange fluid is steam, condensed water will be generated on the surface of the phase change unit 103 after heat exchange. The condensed water flows downward due to gravity and passes through the third flow equalizing plate 106 and gathers on the bottom plate 107. At this time, the condensed water of the connecting pipe 1106 and the first branch pipe 1102 is ejected through the ejector 1101, so that the condensed water from the first branch pipe 1102 flows into the interlayer flow channel 1070 through the first movable door 1072, the second movable door 1073 and the third movable door 1074, and enters the ejector 1101 through the first branch pipe 1102. The condensed water from the water hammer mitigation device 109 enters the ejector 1101 through the connecting pipe 1106, and the condensed water is discharged from the third branch pipe 1104 to the outside of the phase change heat accumulator 200 through the ejector 1101.

(3) When the heat exchange fluid is steam, if fluid circulation is performed, the valves 1105 on the first branch pipe 1102 and the second branch pipe, as well as the first movable door 1072, the second movable door 1073, and the third movable door 1074 are opened. After a round of circulation of the heat exchange fluid, the steam that should have flowed out of the outlet pipe 1012 is sucked by the ejector 1101, and the steam passes through the third movable door 1074, the interlayer flow channel 1070, and the first branch pipe 1102 in sequence to enter the ejector 1101, and then passes through the third branch pipe 1104 and the second branch pipe 1103 in sequence to re-enter the inlet pipe 1011, and then enters the box 101 again for a new circulation.

The operation process of the phase change heat storage device 200 during heat release includes the following situations:

Before releasing heat, the phase change heat accumulator 200 needs to release part of the stored hot water through the interlayer flow channel 1070, and then introduce cold water to use the cold water to reduce the temperature of the thermosensitive hydrogel and stretch it, so that the first active hole, the second active hole and the first through hole are connected, so that the heat exchange fluid can flow smoothly to the next process.

(1) If you want to obtain hot water with a higher temperature, the heat exchange fluid passes through all the flow channels in the same fan-shaped area, and the fluid flow direction is the same as when charging. That is, keep the valves 1105 on the connecting pipe 1106, the first branch pipe 1102, the second branch pipe 1103, and the third branch pipe 1104 closed, the first movable door 1072, the second movable door 1073, and the third movable door 1074 closed, and open the valve 1105 at the outlet pipe 1012. When the heat exchange fluid is introduced, the heat exchange fluid first passes through the water hammer mitigation device 109 and the inlet pipe 1011. After the heat exchange fluid is evenly divided by the third flow equalizing plate 106, it flows through the first flow channel 201, the second through hole of the second flow equalizing plate 20 and the first fixed hole of the first flow equalizing plate 10 in sequence. Then the heat exchange fluid turns and passes through the first movable hole of the first flow equalizing plate 10 and the first through hole of the second flow equalizing plate 20 again to flow into the second flow channel 202. After the heat exchange fluid flows out of the second flow channel 202 through the first flow hole 1061 on the third flow equalizing plate 106, it turns again through the bottom plate 107 and enters the third flow channel 203, and flows through the third through hole of the second flow equalizing plate 20 and the second fixed hole of the first flow equalizing plate 10 in sequence. Then the heat exchange fluid turns and passes through the second movable hole of the first flow equalizing plate 10 and the fourth through hole of the second flow equalizing plate 20 again to enter the fourth flow channel 204, and finally flows out through the first flow hole 1061 of the third flow equalizing plate 106 and the outlet pipe 1012.

(2) If you want to get hot water at a lower temperature, the heat exchange fluid passes through the first flow channel 201 and the second flow channel 202. That is, keep the connecting pipe 1106, the second branch pipe 1103 and the valve 1105 on the outlet pipe 1012 closed, close the first movable door 1072, open the valves 1105 on the first branch pipe 1102 and the third branch pipe 1104, and the second movable door 1073 and the third movable door 1074, and the second inner movable hole 17 and the second outer movable hole 18 of the moving flow plate in the fourth flow channel 204 are completely closed with the fourth inner through hole 27 and the fourth outer through hole 28, respectively, so that the heat exchange fluid cannot pass through the fourth flow channel 204 for heat exchange and flow out of the box 101, so that the heat exchange fluid will not enter the third flow channel 203 and the fourth flow channel 204. When the heat exchange fluid is introduced, the heat exchange fluid first passes through the water hammer elimination device 109 and the inlet pipe 1011, and after being equalized by the third flow equalizing plate 106, it passes through the first flow channel 201, the second through hole of the second flow equalizing plate 20 and the first fixed hole of the first flow equalizing plate 10 in sequence, and then the fluid turns and passes through the first movable hole of the first flow equalizing plate 10 and the first through hole of the second flow equalizing plate 20 again to enter the second flow channel 202, and then passes through the first flow hole 1061 and the second movable door 1073 of the third flow equalizing plate 106 again to enter the interlayer flow channel 1070, and then flows through the first branch pipe 1102, the ejector 1101 and the third branch pipe 1104 in sequence to be sent to the demand end, or, the third movable door 1074 is opened so that the heat exchange fluid in the interlayer flow channel 1070 is sent to the demand end through the third movable door 1074 and the outlet pipe 1012.

In other embodiments, when the driving mechanism 30 adopts a driving mode in which a motor and a gear drive the dynamic equalizing plate to rotate, the heat exchange fluid can also be controlled to flow through multiple channels in the same area. For example, by controlling the dynamic equalizing plates in three areas of the multiple channels to rotate relative to the static equalizing plates, the first movable holes and the second movable holes in the three areas are staggered with the first through holes and the fourth through holes, respectively, and only one area of the equalizing plate is retained for the fluid to flow through, and all movable doors are closed at the same time, so that the heat exchange fluid can only flow through the first channel 201, the second channel 202, the third channel 203 and the fourth channel 204 in sequence, thereby releasing 1/4 of the heat in the phase change heat accumulator 200.

It can be understood that the two control methods of controlling the heat exchange fluid to flow through all fan-shaped areas within the same flow channel and controlling the number of flow channels within the same fan-shaped area through which the heat exchange fluid flows can be used separately or in combination, thereby forming a combination of various flow conditions and heat release temperature conditions, which is suitable for various heat load scenarios.

The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present application.

Claims (13)

1.A flow straightener, comprising:

The first flow equalizing plate is provided with a first inner movable hole and a first outer movable hole at intervals in sequence from the center to the edge;

the second flow equalizing plate is stacked above the second flow equalizing plate, a first inner through hole and a first outer through hole are sequentially arranged at intervals in the direction from the center to the edge of the second flow equalizing plate, the first inner through hole and the first inner movable hole are correspondingly arranged and have a first on-off state, and the first outer through hole and the first outer movable hole are correspondingly arranged and have a second on-off state; and

The driving mechanism is connected to the first current equalizing plate and is used for driving the first current equalizing plate to move relative to the second current equalizing plate, so that the first on-off state and the second on-off state are switched between being completely conducted or at least partially closed, and in an initial state, the first on-off state and the second on-off state are different.

2. The flow equalizer of claim 1, wherein the flow equalizer is applied to a casing, the driving mechanism comprises a temperature-sensitive material and a first elastic member, the temperature-sensitive material and the first elastic member are arranged at intervals, one end of the first elastic member is connected to the casing, the other end of the first elastic member and the temperature-sensitive material are connected to the first flow equalizing plate, and the temperature-sensitive material deforms in response to temperature so as to drive the first flow equalizing plate to move relative to the casing and enable the first elastic member to deform in an expanding manner.

3. The flow equalizer of claim 1, wherein the flow equalizer is applied in a case, the flow equalizer further comprises a positioning plate, the positioning plate extends along a diameter direction of the case, two ends of the positioning plate are respectively abutted to the first flow equalizer and the case, the positioning plate is used for dividing the first flow equalizer into at least two areas, and the at least two areas are respectively movable relative to the second flow equalizer.

4. The phase change heat accumulator is characterized by comprising a box body, a first partition plate, a plurality of phase change units and the flow equalizing device as claimed in any one of claims 1-3, wherein the first partition plate is arranged in the box body so as to enable the box body to be divided into a first flow channel and a second flow channel in the direction from the center to the edge, the first flow equalizing plate and the second flow equalizing plate are positioned at the top of the first partition plate and are arranged at intervals with the top of the box body, the box body is provided with an inlet pipe and an outlet pipe, the inlet pipe is communicated with the first flow channel, the outlet pipe is respectively and directly or indirectly communicated with the first flow channel and the second flow channel, the phase change units are uniformly distributed in the first flow channel and the second flow channel,

The first flow equalizing plate interval is equipped with first inboard fixed orifices and first outside fixed orifices, first inboard fixed orifices first outside fixed orifices first inboard movable orifices and first outside movable orifices follow in proper order the center of box is to the direction interval arrangement of edge, just first inboard fixed orifices with first outside fixed orifices corresponds first runner, first inboard movable orifices with first outside movable orifices corresponds the second runner, second flow equalizing plate interval is equipped with second inboard through-hole and second outside through-hole, second inboard through-hole second outside through-hole first inboard through-hole and first outside through-hole follow in proper order the center of box is to the direction interval arrangement of edge, just second inboard through-hole with first inboard fixed orifices corresponds and fully switches on, second outside through-hole with first outside fixed orifices corresponds and crisscross setting.

5. The phase change heat accumulator according to claim 4, wherein the first elastic member is located on a side of the temperature sensitive material near a center of the tank, defines a state in which heat exchange fluid is not introduced into the tank as an initial state, in which the temperature sensitive material is in an expanded and relaxed state, the first elastic member is in a relaxed state, the first inner movable hole is at least partially closed with the first inner through hole, and the first outer movable hole is completely in communication with the first outer through hole.

6. The phase change heat accumulator according to claim 4, wherein the first flow equalizing plate includes a first static flow equalizing plate and a first flow equalizing plate, the first static flow equalizing plate is disposed corresponding to the first flow channel and is provided with the first inner fixing hole and the first outer fixing hole, the first flow equalizing plate is disposed corresponding to the second flow channel and is provided with the first inner moving hole and the first outer moving hole, the driving mechanism is connected to the first flow equalizing plate, and the driving mechanism is used for driving the first flow equalizing plate to move relative to the first static flow equalizing plate.

7. The phase change heat accumulator according to claim 4, further comprising a second separator and a third separator, the second separator and the third separator are sequentially and alternately arranged between the first separator and the side wall of the case, the second separator is positioned on one side of the third separator close to the first separator, so that the first separator and the second separator form the second flow channel, the space from the second separator to the side wall of the case is sequentially separated to form a third flow channel and a fourth flow channel, the third flow channel and the fourth flow channel are respectively provided with the phase change unit, the third flow channel and the fourth flow channel are respectively and directly or indirectly communicated with the outlet pipe, the first flow equalizing plate is sequentially and alternately provided with a second inner side fixed hole, a second outer side fixed hole, a second inner side movable hole and a second outer side movable hole, the second inner side plate is sequentially and alternately provided with a third flow equalizing plate, the third flow equalizing plate corresponds to the second outer side fixed hole and the second outer side fixed hole, the second inner side moving hole corresponds to the third flow equalizing plate and the fourth flow channel is completely closed, the second flow equalizing plate corresponds to the second outer side fixed hole and the fourth flow channel is completely closed, the second flow equalizing plate is correspondingly provided with the second inner side fixed hole is completely closed, and the second flow equalizing plate is completely closed, and is opened, the second outside movable hole is completely communicated with or at least partially closed with the fourth outside through hole;

The phase change heat accumulator further comprises a third flow equalizing plate, the third flow equalizing plate is located between the second flow equalizing plate and the bottom of the case, the first flow passage, the second flow passage, the third flow passage and the fourth flow passage are located between the second flow equalizing plate and the third flow equalizing plate, the third flow equalizing plate is provided with a plurality of first flow equalizing holes, the first flow equalizing holes are correspondingly communicated with the first flow passage, the second flow passage, the third flow passage and the fourth flow passage respectively, the first flow passage is communicated with the inlet pipe through the first flow equalizing holes, one ends of the first partition plates and the third partition plates are in butt joint with the second flow equalizing plate, the other ends of the first partition plates and the third partition plates extend towards the bottom of the case, one ends of the second partition plates are in butt joint with the third flow equalizing plate, and the other ends of the second partition plates are in butt joint with the top of the case.

8. The phase change heat accumulator according to claim 7, further comprising a bottom plate, wherein the bottom plate is located between the third flow equalizing plate and the bottom of the case, one ends of the first partition plate and the third partition plate, which are far away from the second flow equalizing plate, are respectively abutted against the third flow equalizing plate, the bottom plate and the bottom of the case enclose to form an interlayer flow channel, a second overflow hole, a first movable door, a second movable door and a third movable door are arranged at intervals of the bottom plate, the inlet pipe is abutted to the bottom plate and communicated with the second overflow hole, the outlet pipe is connected to the side wall of the case and located between the third flow equalizing plate and the bottom plate, the first movable door is located in a space enclosed by the first partition plate, the second movable door is located in a space enclosed by the first partition plate and the third partition plate, the third movable door is located in the fourth flow channel and communicated with the third flow channel, the first movable door and the third flow channel are respectively closed or one of the fourth flow channels and the third flow channel are formed by the third movable door and the third movable door.

9. The phase change thermal storage of any one of claims 4-8, wherein the phase change cells are phase change fibers and the phase change fibers have a diameter on the order of millimeters or less; and/or the number of the phase change units in the second flow channel is larger than that in the first flow channel, and the diameter of the phase change units in the second flow channel is smaller than that in the first flow channel.

10. The phase change heat accumulator according to any one of claims 4-8, further comprising a water hammer digestion device, the water hammer digestion device comprising a housing, a positioning rod, a helical blade, a second elastic member and an opening and closing mechanism, the housing being arranged at an inlet of the inlet pipe and communicating with the inlet pipe, the positioning rod, the helical blade, the second elastic member and the opening and closing mechanism being all located in the housing, the positioning rod being connected to the housing, one end of the positioning rod being provided with an external thread to form a threaded connection portion, the opening and closing mechanism being in threaded connection with the threaded connection portion, two ends of the second elastic member being connected to the opening and closing mechanism and the housing, respectively, and the second elastic member being sheathed on an outer circumference of the threaded connection portion, the helical blade being spirally wound on an outer circumference of the positioning rod and connected to the opening and closing mechanism, the helical blade being used for moving in a positioning length direction under a rotation of the helical blade to open and close the opening and closing mechanism.

11. The phase change heat accumulator according to claim 10, wherein the opening and closing mechanism includes a hollow slider, a threaded slider, a first support member, a second support member, a movable connection member and a blocking piece, the hollow slider is movably connected to the positioning rod and connected to the spiral blade, the threaded slider and the hollow slider are arranged at intervals and are in threaded connection with the threaded connection portion, the first support member is connected to the hollow slider and extends along the length direction of the positioning rod, the second support member is connected to the threaded slider and extends along the radial direction of the positioning rod, the movable connection member is movably connected to one ends of the first support member and the second support member, which are far away from the positioning rod, and two ends of the blocking piece are respectively connected to the threaded slider and the first support member.

12. The phase change heat accumulator according to claim 10, wherein the water hammer digestion device further comprises a fixed frame and a limiting piece, the limiting piece is mounted on the inner wall of the housing, the fixed frame is fixed in the housing and abuts against the limiting piece, the threaded connection portion is connected to the fixed frame, and the positioning rod, the helical blade, the second elastic piece and the opening and closing mechanism are all located in the fixed frame; and/or the number of the groups of groups,

The water hammer digestion device further comprises an insulation layer, wherein the insulation layer is arranged on the periphery of the shell; and/or the number of the groups of groups,

The water hammer digestion device further comprises a capillary layer, wherein the capillary layer is arranged on the inner wall of the shell and positioned at the front end of the spiral blade.

13. The phase change heat accumulator according to any one of claims 4-8, further comprising a fluid circulation device, the fluid circulation device comprising an ejector, a first branch pipe, a second branch pipe, a third branch pipe and a plurality of valves, the first branch pipe being in communication with the outlet pipe, both ends of the second branch pipe being connected to the inlet pipe and the third branch pipe, respectively, and the first branch pipe and the third branch pipe being connected to an inlet and an outlet of the ejector, respectively, the plurality of valves being provided in the third branch pipe and the outlet pipe, respectively.