CN222187924U - Coil heat exchange components, coil heat exchangers and HVAC equipment - Google Patents

Abstract

The application relates to the technical field of heating ventilation and discloses a coil heat exchange assembly, a coil heat exchanger and heating ventilation equipment, wherein the coil heat exchange assembly is provided with a first area and a second area which are arranged along a second direction, the airflow velocity formed by an airflow driving assembly in the first area is higher than that in the second area along the second direction, and the second direction is intersected with the first direction; at least one first heat exchange tube is arranged in the first area, and at least one second heat exchange tube is arranged in the second area; the first heat exchange tube and the second heat exchange tube are connected in parallel between the water inlet of the coil heat exchange assembly and the water outlet of the coil heat exchange assembly, and the tube pass from the inlet to the outlet of the first heat exchange tube is smaller than the tube pass from the inlet to the outlet of any one of the second heat exchange tubes, so that the total heat exchange amount of the coil heat exchange assembly is increased, and the heat exchange efficiency of the coil heat exchange assembly is improved.

Description

Coil pipe heat exchange assembly, coil pipe heat exchanger and heating ventilation equipment

Technical Field

The application relates to the technical field of heating ventilation, in particular to a coil heat exchange assembly, a coil heat exchanger and heating ventilation equipment.

Background

This section provides merely background information related to the application, which is not necessarily prior art.

Heat exchangers are commonly used in hvac equipment to regulate indoor temperature. The coil heat exchanger is one of common coil heat exchangers in heating ventilation equipment, a water flow channel can be arranged in the coil heat exchanger, and water flows through the water flow channel to exchange heat with external air flow, so that the aim of adjusting indoor temperature is fulfilled. At present, in some technologies, a fan is installed at one side of a coil heat exchanger to promote external airflow to flow through the coil heat exchanger, and the fan can improve the heat exchange efficiency of the coil heat exchanger, but the heat exchange efficiency of the coil heat exchanger is still limited.

Disclosure of utility model

The object of the present application is to at least increase the heat exchange efficiency of a coil heat exchanger. The aim is achieved by the following technical scheme:

The first aspect of the application provides a coil heat exchange assembly, which is applied to a coil heat exchanger with an air flow driving assembly, wherein the air flow driving assembly is used for driving air flow to flow through the coil heat exchange assembly along a first direction, the coil heat exchange assembly is provided with a first area and a second area which are arranged along a second direction, the air flow speed of the air flow driving assembly formed in the first area is higher than that of the air flow of the second area along the second direction, the second direction is intersected with the first direction, at least one first heat exchange tube is arranged in the first area, at least one second heat exchange tube is arranged in the second area, the first heat exchange tube and the second heat exchange tube are connected in parallel between a water flow inlet of the coil heat exchange assembly and a water flow outlet of the coil heat exchange assembly, and the tube pass from an inlet to an outlet of each first heat exchange tube is smaller than that of any second heat exchange tube.

According to the coil heat exchange assembly, the tube side of the first heat exchange tube of the first area with higher airflow velocity of the coil heat exchanger is arranged to be shorter, so that the corresponding flow velocity of water flow in the first heat exchange tube is higher, the heat exchange efficiency of the heat exchange tube is in direct proportion to the flow velocity inside and outside the tube, the heat exchange quantity per unit area of the area is increased by higher airflow velocity outside the tube, and the tube side of the first heat exchange tube of the second area with lower airflow velocity of the coil heat exchanger is arranged to be longer, so that the corresponding flow velocity of water flow in the second heat exchange tube is lower, and the ratio of the heat exchange quantity per unit area of the area is reduced by lower airflow velocity outside the tube of the area, so that the total heat exchange quantity of the coil heat exchange assembly is increased, and the heat exchange efficiency of the coil heat exchange assembly is improved.

In addition, the coil heat exchange assembly according to the application may also have the following additional technical features:

In some embodiments of the present application, each of the first heat exchange tubes includes one U-shaped tube or a plurality of U-shaped tubes connected in series, each of the second heat exchange tubes includes a plurality of U-shaped tubes connected in series, and the number of U-shaped tubes of the second heat exchange tube is greater than the number of U-shaped tubes of the first heat exchange tube, and each of the U-shaped tubes extends along a third direction, and the third direction, the second direction, and the first direction intersect two by two.

In some embodiments of the present application, the coil heat exchange assembly further includes at least one third heat exchange tube, the first heat exchange tube, and the second heat exchange tube are connected in parallel between the water inlet and the water outlet, the third heat exchange tube includes a water inlet section and a water outlet section that are connected, the water inlet section is connected to the water inlet, the water outlet section is connected to the water outlet, the water inlet section is disposed in the first region, and the water outlet section is disposed in the second region.

In some embodiments of the application, the area of the largest flow cross-section of the water inlet section is less than or equal to the area of the smallest flow cross-section of the water outlet section.

In some embodiments of the present application, the water inlet section includes one U-shaped tube or a plurality of U-shaped tubes connected in series, the water outlet section includes a plurality of parallel U-shaped tubes, inlets of the plurality of parallel U-shaped tubes of the water outlet section are all connected with outlets of the water inlet section, each of the U-shaped tubes extends along a third direction, and the third direction, the second direction and the first direction intersect each other two by two.

In some embodiments of the application, the second zone is provided in two, the first zone is provided in the middle of the coil heat exchange assembly in the second direction, and the two second zones are provided on opposite sides of the first zone in the second direction, respectively.

In some embodiments of the present application, the coil heat exchange assembly further includes a water diversion member having the water inlet, the water outlet, a plurality of water inlet diversion ports, and a plurality of water outlet diversion ports, the inlet of the first heat exchange tube, the inlet of the second heat exchange tube, and the inlet of the third heat exchange tube are respectively communicated with the water inlet through at least one of the water inlet diversion ports, and the outlet of the first heat exchange tube, the outlet of the second heat exchange tube, and the outlet of the third heat exchange tube are respectively communicated with the water outlet through at least one of the water outlet diversion ports, the number of water outlet diversion ports being greater than the number of water inlet diversion ports.

In some embodiments of the present application, the water inlet split-flow port is connected with a water inlet branch pipe, the water outlet split-flow port is connected with a water outlet branch pipe, the inlet of the first heat exchange tube, the inlet of the second heat exchange tube and the inlet of the third heat exchange tube are respectively communicated with the corresponding water inlet split-flow port through the water inlet branch pipe, and the outlet of the first heat exchange tube, the outlet of the second heat exchange tube and the outlet of the third heat exchange tube are respectively communicated with the corresponding water outlet split-flow port through the water outlet branch pipe.

The second aspect of the application provides a coil heat exchange assembly, which is applied to a coil heat exchanger with an airflow driving assembly, wherein the airflow driving assembly is used for driving airflow to flow through the coil heat exchange assembly along a first direction, the coil heat exchange assembly is provided with a first area and a second area which are arranged along a second direction, the airflow speed of the airflow driving assembly formed in the first area is higher than that of the airflow speed of the airflow driving assembly formed in the second area along the second direction, the second direction is intersected with the first direction, the coil heat exchange assembly comprises at least one third heat exchange tube, the third heat exchange tube comprises a water inlet section and a water outlet section, the water inlet section is communicated with a water inlet of the coil heat exchange assembly, the water outlet section is communicated with a water outlet of the coil heat exchange assembly, and the water inlet section is arranged in the first area, and the water outlet section is arranged in the second area.

According to the coil heat exchange assembly, energy is lost when water flows in the third heat exchange tube, so that the flow speed of the water flow in the inlet section is higher than that of the water flow in the outlet section. In the embodiment, the inlet section of the third heat exchange tube is arranged in the first area with higher airflow velocity, the outlet section of the third heat exchange tube is arranged in the second area with lower airflow velocity, the heat exchange efficiency of the heat exchange tube is in direct proportion to the flow velocity inside and outside the tube, the temperature difference between the inside and outside the tube is larger at the inlet section, the airflow velocity outside the tube of the inlet section in the first area is higher, the heat exchange quantity increase proportion of the unit area is more, and in the same way, the airflow velocity outside the tube of the outlet section of the second area is relatively lower, the temperature difference between the inside and outside the tube of the outlet section is relatively lower, so that the proportion of the unit area heat exchange quantity decrease is less, the total heat exchange quantity of the coil heat exchange assembly is increased, and the heat exchange efficiency of the coil heat exchange assembly is improved.

In addition, the coil heat exchange assembly according to the application may also have the following additional technical features:

In some embodiments of the present application, the water inlet section includes one U-shaped tube or a plurality of U-shaped tubes connected in series, the water outlet section includes a plurality of parallel U-shaped tubes, inlets of the plurality of parallel U-shaped tubes of the water outlet section are all connected with outlets of the water inlet section, each of the U-shaped tubes extends along a third direction, and the third direction, the second direction and the first direction intersect each other two by two.

A third aspect of the present application provides a coiled tube heat exchanger, comprising an airflow driving assembly and a coiled tube heat exchange assembly according to the present application or any embodiment of the present application, wherein the airflow driving assembly is disposed at one side of the coiled tube heat exchange assembly along the first direction.

In addition, the coil heat exchanger according to the application may also have the following additional technical features:

In some embodiments of the application, the inlet of the first heat exchange tube is located on a side of the outlet of the first heat exchange tube facing away from the airflow driving assembly in the first direction;

And/or, along the first direction, the inlet of the second heat exchange tube is positioned at one side of the outlet of the second heat exchange tube, which is away from the airflow driving assembly.

A fourth aspect of the application provides a heating ventilation apparatus comprising a coiled heat exchanger according to the application or any of the embodiments of the application.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is a schematic illustration of a coiled tube heat exchanger according to some embodiments of the present application;

FIG. 2 is a schematic illustration of a coiled tubing heat exchange assembly according to some embodiments of the present application;

FIG. 3 is a schematic illustration of the correlation of coil heat exchange assemblies with airflow velocity in accordance with some embodiments of the application;

FIG. 4 is a schematic view of a first heat exchange tube according to some embodiments of the present application;

FIG. 5 is a schematic view of a second heat exchange tube according to some embodiments of the present application;

FIG. 6 is a schematic illustration of the correlation of coil heat exchange assemblies with airflow velocity in accordance with some embodiments of the application;

FIG. 7 is a schematic view of a third heat exchange tube according to some embodiments of the present application;

fig. 8 is a schematic diagram of a coil heat exchange assembly in accordance with some embodiments of the application in relation to airflow velocity.

The reference numerals are as follows:

100. a coil heat exchange assembly;

10. u-shaped pipes, 11, first U-shaped pipes, 12, second U-shaped pipes, 13, third U-shaped pipes, 14, fourth U-shaped pipes, 15, fifth U-shaped pipes, 16, sixth U-shaped pipes, 17, seventh U-shaped pipes, 18, eighth U-shaped pipes, 20, connecting pieces, 30, tee pieces, 40, cross-pipe connecting pieces;

101. The first area, 102, the second area, 110, the first heat exchange tube, 120, the second heat exchange tube, 130, the third heat exchange tube, 131, the water inlet section, 132, the water outlet section, 140, the water collecting piece, 141, the water inlet channel, 142, the water outlet channel, 143, the water inlet, 144, the water outlet, 145, the water inlet branch pipe, 146, the water outlet branch pipe, 150, the fin, 160, the shell, 161, the end plate, 162 and the air flow outlet;

200. An air flow driving assembly;

X, a first direction, Y, a second direction, Z, a third direction, A, a water flow direction, B, a flow velocity curve, V and an airflow velocity.

Detailed Description

Exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below" may include both upper and lower orientations.

The coil heat exchanger is one of common heat exchangers in heating ventilation equipment, a water flow channel can be arranged in the coil heat exchanger, and water flows through the water flow channel to exchange heat with external air flow, so that the aim of adjusting indoor temperature is fulfilled. In some technologies, a fan is installed at one side of the coil heat exchanger to promote external airflow to flow through the coil heat exchanger, and after analysis of a fan duct of the coil heat exchanger, it is found that, because a fan air opening is located in the middle or middle-upper part of the unit, the flow velocity of the air outlet airflow is in a direction perpendicular to the airflow flowing direction, and the situation that the middle is high and the two sides are low, or the one side is high and the other side is low is presented. At present, the water collecting and distributing scheme of the coil heat exchanger is that the quantity of inlets and outlets is identical, all flow paths are uniform, the water flow speeds of all positions are the same or similar, no obvious distinguishing treatment is carried out on the flow speed distribution of the external air flow, and the heat exchange efficiency of the coil heat exchanger cannot be fully reflected.

In view of the above, as shown in fig. 1 to 7, the present application proposes a coiled heat exchange assembly 100, which is applied to a coiled heat exchanger having an airflow driving assembly 200, wherein the airflow driving assembly 200 is used for driving airflow to flow through the coiled heat exchange assembly 100 along a first direction X, the coiled heat exchange assembly 100 has a first region 101 and a second region 102 arranged along a second direction Y, and an airflow velocity V of the airflow driving assembly 200 formed in the first region 101 is higher than an airflow velocity V of the second region 102 along the second direction Y, and the second direction Y intersects the first direction X. At least one first heat exchange tube 110 is arranged in the first area 101 of the coil heat exchange assembly 100, at least one second heat exchange tube 120 is arranged in the second area 102, the first heat exchange tube 110 and the second heat exchange tube 120 are connected in parallel between the water inlet 143 of the coil heat exchange assembly 100 and the water outlet 144 of the coil heat exchange assembly 100, and the tube pass from the inlet to the outlet of the first heat exchange tube 110 is smaller than the tube pass from the inlet to the outlet of each second heat exchange tube 120.

Wherein, the airflow driving assembly 200 may be a fan, and the tube side is the length of a flow path, i.e. a path of water flow. The water inlet 143 in the coil heat exchange assembly 100 may be understood as the total flow inlet of the coil heat exchange assembly 100 and the water inlet 143 in the coil heat exchange assembly 100 may be understood as the total flow inlet of the coil heat exchange assembly 100.

The first heat exchange tubes 110 may be one or more, the inlet of each first heat exchange tube 110 is communicated with the water inlet 143 in the coil heat exchange assembly 100, the outlet of each first heat exchange tube 110 is communicated with the water outlet 144 of the coil heat exchange assembly 100, that is, each first heat exchange tube 110 forms a complete pipeline from water inlet to water outlet of the coil heat exchange assembly 100, and each first heat exchange tube 110 is independent and may be connected in parallel between the water inlet 143 and the water outlet 144.

The second heat exchange tubes 120 may be one or more, the inlet of each second heat exchange tube 120 is communicated with the water inlet 143 in the coil heat exchange assembly 100, the outlet of each second heat exchange tube 120 is communicated with the water outlet 144 of the coil heat exchange assembly 100, that is, each second heat exchange tube 120 forms a complete pipeline from water inlet to water outlet of the coil heat exchange assembly 100, and each second heat exchange tube 120 is independent and may be connected in parallel between the water inlet 143 and the water outlet 144. The first heat exchange tubes 110 and the second heat exchange tubes 120 are also independent from each other, and the first heat exchange tubes 110 and the second heat exchange tubes 120 are connected in parallel between the water inlet 143 and the water outlet 144.

The tube side of the first heat exchange tube 110 is smaller than the tube side of the second heat exchange tube 120, and it is understood that the path along which the water flow from the water inlet 143 flows back through the first heat exchange tube 110 to the water outlet 144 is shorter than the path along which the water flow from the water inlet 143 flows back through the second heat exchange tube 120 to the water outlet 144.

The air flow is typically an air flow. The first direction X may be understood as the flow direction of the air flow. The second direction Y may be substantially perpendicular to the first direction X. In some embodiments, the airflow assembly forms an airflow that flows in a horizontal direction, and the second direction Y may be substantially vertical.

The first zone 101 and the second zone 102 are divided according to the airflow velocity V formed by the airflow driving assembly 200. As shown in fig. 3, the airflow velocity V of the airflow driving assembly 200 in the second direction Y has a flow velocity curve B having a substantially parabolic shape. Where only one airflow driving assembly 200 is located at a position opposite to the airflow outlet 162 of the airflow driving assembly 200, typically, the airflow velocity V is the highest position, where the overlapping position between the two airflow driving assemblies 200 may form the highest position of the airflow velocity, where the partial area from the highest airflow velocity V to both sides may be divided into the first area 101, and the second area 102 is far from the highest airflow velocity V with respect to the first area 101.

In the second direction Y, the coil heat exchange assembly 100 may be divided into two zones, namely a first zone 101 and a second zone 102, and in the second direction Y, the coil heat exchange assembly 100 may also be divided into three zones, for example, as shown in fig. 3 and 6, one second zone 102 is divided on each of opposite sides of the first zone 101. In the second direction Y, the coil heat exchange assembly 100 may also be divided into a plurality of zones, at least two of which meet the arrangement requirements of the respective heat exchange tubes of the first zone 101 and the second zone 102.

In fig. 3 and 6, the left side shows the relationship between the flow rate of the air flow and the second direction Y of the coil heat exchange assembly 100, wherein the ordinate on the right side shows the corresponding position in the second direction Y, and the abscissa on the right side shows the flow rate V of the air flow.

According to the coil heat exchange assembly 100 of the present embodiment, the tube side of the first heat exchange tube 110 in the first region 101 with a higher airflow velocity V is set to be shorter, so that the flow resistance is smaller, and correspondingly, the flow velocity of the water flow in the first heat exchange tube 110 is higher, and the heat exchange efficiency of the heat exchange tube is proportional to the flow velocity inside and outside the tube, so that the heat exchange amount per unit area of the region is increased more, and similarly, the tube side of the first heat exchange tube 110 in the second region 102 with a lower airflow velocity V of the coil heat exchanger is set to be longer, so that the flow resistance is larger, and correspondingly, the flow velocity of the water flow in the second heat exchange tube 120 is lower, and accordingly, the heat exchange amount per unit area of the region is reduced less, so that the total heat exchange amount of the coil heat exchange assembly 100 is increased, and the heat exchange efficiency of the coil heat exchange assembly 100 is improved.

The coil heat exchange assembly 100 of the present embodiment may further include a housing 160, and the heat exchange tubes of the coil heat exchange assembly 100, including the first heat exchange tube 110, the second heat exchange tube 120, and the third heat exchange tube 130, are all disposed on the housing 160. Specifically, the housing 160 is provided with an accommodating space, the main parts of the first heat exchange tube 110, the second heat exchange tube 120 and the third heat exchange tube 130 are disposed in the accommodating space, two ends of the housing 160 along the third direction Z may be provided with end plates 161, the ends of the first heat exchange tube 110, the second heat exchange tube 120 and the third heat exchange tube 130 may be fixed on the end plates 161 at the corresponding ends, specifically, the ends of the first heat exchange tube 110, the second heat exchange tube 120 and the third heat exchange tube 130 may respectively pass through the end plates 161 of the housing, and may be connected with the end plates 161 in an expansion manner and a welding manner. The end plate 161 can be used for being connected with other structural members of the whole machine to play a role in fixing the structure. The end plate 161 of the housing and the housing may be integrally formed, or may be separately assembled.

The housing 160 may have a substantially rectangular parallelepiped structure, one of two opposite sides of the housing 160 along the first direction X (for convenience of description, the first side is defined as a first side), an opposite side of the housing 160 from the air inlet (for convenience of description, the second side is defined as a second side), and the air outlet 162 is provided, and the air driving assembly 200 may be fixedly connected to the housing 160 and disposed on a side where the first side is located.

It should be noted that the first side may be partially hollowed out to form the air inlet, and the first side may be entirely hollowed out, i.e. the housing 160 is not provided with a side wall on the first side to form the air inlet, the second side may be partially hollowed out to form the air outlet 162, and the second side may be entirely hollowed out, i.e. the housing 160 is not provided with a side wall on the second side to form the air outlet 162. In fig. 1, the second side is entirely hollowed out to form the air flow outlet 162, and in order to simplify the drawing, fig. 1 only shows the actual structure of the coil heat exchanger at a partial position of the second side, but does not show the entire internal structure of the coil heat exchanger.

In some embodiments, optionally, each of the first heat exchange tubes 110 includes one U-shaped tube 10 or a plurality of U-shaped tubes 10 connected in series, each of the second heat exchange tubes 120 includes a plurality of U-shaped tubes 10 connected in series, and the number of U-shaped tubes 10 of the second heat exchange tubes 120 is greater than the number of U-shaped tubes 10 of the first heat exchange tubes 110, each of the U-shaped tubes 10 extends along a third direction Z, and the third direction Z, the second direction Y, and the first direction X intersect two by two.

The third direction Z, the second direction Y, and the first direction X may be disposed substantially perpendicular to each other, and in some embodiments, the first direction X may be understood as a width direction of the housing 160, the second direction Y may be understood as a height direction of the housing 160, and the third direction Z may be understood as a length direction of the housing 160.

The U-shaped tube 10, i.e., a substantially U-shaped tube, includes two main body tube portions disposed substantially in parallel and an elbow connecting and communicating the two main body tube portions. A plurality of serially connected U-shaped tubes 10 may be understood as a plurality of U-shaped tubes 10 being connected in sequence.

In this embodiment, the U-shaped tube 10 forming the first heat exchange tube 110 and the U-shaped tube 10 forming the second heat exchange tube 120 may be the same size tube, and the structure and the size matrix are the same. All of the U-tubes 10 of the coil heat exchange assembly 100 may be substantially evenly distributed such that the number of U-tubes 10 is substantially the same throughout the volume.

The first heat exchange tube 110 may include one U-shaped tube 10, and in this case, the second heat exchange tube 120 may include two or more U-shaped tubes 10 connected and communicated in sequence. The first heat exchange tube 110 may include two or more U-shaped tubes 10 connected and connected in series, and the second heat exchange tube 120 may include three or more U-shaped tubes 10 connected and connected in series. Wherein the number of the U-shaped tubes 10 in the second heat exchange tube 120 is at least 1 more than the number of the U-shaped tubes 10 in the first heat exchange tube 110.

In one embodiment, as shown in fig. 3, three first heat exchange tubes 110 may be disposed in the first area 101, as shown in fig. 3 and 4, each first heat exchange tube 110 may include two U-shaped tubes 10 sequentially connected and communicated, where two U-shaped tubes 10 may be connected by a connecting member 20, the connecting member 20 may be a semicircular tube, as shown in fig. 3, one second heat exchange tube 120 is disposed in the upper second area 102, as shown in fig. 3 and 5, the second heat exchange tube 120 includes three U-shaped tubes 10 sequentially connected, and adjacent two U-shaped tubes 10 may be connected by a connecting member 20 along the flow direction of water flow, the connecting member 20 may be a semicircular tube, as shown in fig. 3, and one second heat exchange tube 120 is disposed in the lower second area 102, and the second heat exchange tube 120 includes 6U-shaped tubes 10 sequentially connected and communicated.

It can be understood that the number of the U-shaped tubes 10 connected in series in the second heat exchange tube 120 is larger, while the number of the U-shaped tubes 10 in the first heat exchange tube 110 is smaller, so that the design requirements of the tube passes of the first heat exchange tube 110 and the second heat exchange tube 120 can be more conveniently realized.

As shown in fig. 6 and 7, optionally, the coiled heat exchange assembly 100 includes at least one third heat exchange tube 130, the first heat exchange tube 110 and the second heat exchange tube 120 are connected in parallel between the water inlet 143 and the water outlet 144, the third heat exchange tube 130 includes a water inlet segment 131 and a water outlet segment 132 which are connected, the water inlet segment 131 is connected to the water inlet 143, the water outlet segment 132 is connected to the water outlet 144, the water inlet segment 131 is disposed in the first area 101, and the water outlet segment 132 is disposed in the second area 102.

The third heat exchange tubes 130 may be one or more, the inlet of each third heat exchange tube 130 is communicated with the water inlet 143 in the coil heat exchange assembly 100, the outlet of each third heat exchange tube 130 is communicated with the water outlet 144 of the coil heat exchange assembly 100, that is, each third heat exchange tube 130 forms a complete pipeline from water inlet to water outlet of the coil heat exchange assembly 100, and each third heat exchange tube 130 is independent and may be connected in parallel between the water inlet 143 and the water outlet 144. The first heat exchange tubes 110, the second heat exchange tubes 120 and the third heat exchange tubes 130 are also independent from each other, and the first heat exchange tubes 110, the second heat exchange tubes 120 and the second heat exchange tubes 120 are connected in parallel between the water inlet 143 and the water outlet 144.

It will be appreciated that the flow rate of the water flow at the inlet section will be higher than the flow rate of the water flow at the outlet section, since there will be energy losses when the water flow is flowing within the third heat exchange tube 130. In this embodiment, the inlet section of the third heat exchange tube 130 is disposed in the first region 101 with a higher airflow velocity V, the outlet section of the third heat exchange tube 130 is disposed in the second region 102 with a lower airflow velocity V, and the heat exchange efficiency of the heat exchange tube is proportional to the flow velocity between the inside and outside of the tube, and the temperature difference between the inside and outside of the tube is larger at the inlet section, and the airflow velocity V outside of the tube in the inlet section of the first region 101 is higher, so that the increase ratio of the heat exchange amount per unit area of the region is more, and in the same way, the airflow velocity V outside of the tube in the outlet section of the second region 102 is relatively lower, and the temperature difference between the inside and outside of the tube in the outlet section is relatively lower, so that the decrease ratio of the heat exchange amount per unit area of the region is less, so that the total heat exchange amount of the coil heat exchange assembly 100 is increased, and the heat exchange efficiency of the coil heat exchange assembly 100 is improved.

Optionally, the area of the largest flow cross-section of the water inlet section 131 is less than or equal to the area of the smallest flow cross-section of the water outlet section 132.

The flow cross section is a cross section perpendicular to the water flow direction a. The water inlet section 131 is cut along a plane perpendicular to the water flow direction a inside the water inlet section 131, and the area of the overlapping area of the plane and the water inlet section 131 can be used as the flow cross-sectional area of the water inlet section 131. The outlet section 132 is cut along a plane perpendicular to the direction a of the water flow inside the outlet section 132, and the area of the area where the plane overlaps the outlet section 132 can be taken as the flow cross-sectional area of the outlet section 132.

It should be appreciated that the inlet section 131 may be of equal diameter in the water flow direction a and the outlet section 132 may be of equal diameter in the water flow direction a. When one of the water inlet segment 131 and the water outlet segment 132 is non-equal-diameter, that is, the areas of the flow cross sections of the water inlet segment 131 passing through no positions are different along the water flow direction a, or the areas of the flow cross sections of the water outlet segment 132 at different positions are different, the flow cross section area of the water inlet segment 131 takes the largest area, and the flow cross section area of the water outlet segment 132 takes the smallest value, that is, the smallest value of the flow cross section area of the water outlet segment 132 needs to be greater than or equal to the largest value of the flow cross section area of the water inlet segment 131, so that the water flow velocity of the water outlet segment 132 is smaller than the water flow velocity of the water outlet segment 132.

It will be appreciated that the flow cross-section of the inlet section 131 is smaller and the flow cross-section of the outlet section 132 is larger, so that in one third heat exchange tube 130, the flow velocity of water in the inlet section 131 is larger and the flow velocity of water in the outlet section 132 is smaller. The heat exchange efficiency of the heat exchange tube is in direct proportion to the flow velocity inside and outside the tube, the water inlet section 131 is arranged in the first area 101, the flow velocity V of the airflow outside the tube of the water inlet section 131 is higher, so that the heat exchange amount per unit area of the area is increased more, the water outlet section 132 is arranged in the second area 102, the flow velocity V of the airflow outside the tube of the water outlet section 132 is also lower, so that the reduction ratio of the heat exchange amount per unit area of the area is less, the total heat exchange amount of the coil heat exchange assembly 100 is increased, and the heat exchange efficiency of the coil heat exchange assembly 100 is improved.

In some embodiments, optionally, the water inlet section 131 includes one U-shaped tube 10 or a plurality of U-shaped tubes 10 connected in series, the water outlet section 132 includes a plurality of parallel U-shaped tubes 10, inlets of the plurality of U-shaped tubes 10 connected in parallel to the water outlet section 132 are all connected to outlets of the water inlet section 131, each U-shaped tube 10 extends along a third direction Z, and the third direction Z, the second direction Y, and the first direction X intersect two by two.

The third heat exchange tube 130 may be formed by connecting a plurality of U-shaped tubes 10 in series or in parallel. The plurality of U-shaped pipes 10 connected in parallel with the water outlet section 132 may be directly connected to the outlet of the water inlet section 131, and the plurality of U-shaped pipes 10 connected in parallel with the water outlet section 132 may also be connected to the outlet of the water inlet section 131 through one U-shaped pipe 10 or a plurality of U-shaped pipes 10 connected in series.

It can be understood that the water outlet section 132 is provided with a plurality of parallel U-shaped tubes 10, so that the third heat exchange tube 130 forms a single-inlet multi-position water flow channel structure, the front half section (i.e. the water inlet section 131) of the flow channel of the third heat exchange tube 130 is a single-inlet flow channel, the total cross-sectional area is small under the condition of the same flow rate, the flow rate in the tube is high, just the area is arranged at the position with relatively high flow rate V of the air flow outside the tube, the heat exchange efficiency is proportional to the flow rate inside and outside the tube, so that the heat exchange amount per unit area of the area is increased more, and in the same way, the back half section (the parallel position of the plurality of U-shaped tubes 10 of the water outlet section 132) of the flow channel is a multi-inlet flow channel, the total cross-sectional area is large under the condition of the same flow rate, the flow rate in the tube is low, the heat exchange amount per unit area is reduced, and the total heat exchange amount of the coil heat exchanger is increased.

As shown in fig. 3 and 6, in some embodiments, two second zones 102 are provided, and in the second direction Y, a first zone 101 is provided in the middle of the coil heat exchange assembly 100, and in the second direction Y, two second zones 102 are provided on both sides of the first zone 101, respectively.

The heat exchange tubes in the upper second region 102 and the heat exchange tubes in the lower second region 102 may be arranged in the same or different arrangement.

Referring to fig. 6 and 7, the exemplary coil heat exchange assembly 100 includes two third heat exchange tubes 130, the water inlet section 131 of each third heat exchange tube 130 includes one U-shaped tube 10, the water outlet section 132 of each third heat exchange tube 130 includes three U-shaped tubes 10, wherein one of the three U-shaped tubes 10 of the water outlet section 132 is connected in series with the outlet of the water inlet section 131, and the outlet of the U-shaped tube 10 is connected in parallel with the other two U-shaped tubes 10. The U-shaped pipe 10 at the most upstream of the water outlet section 132, namely the U-shaped pipe 10 of which the water outlet section 132 is connected with the water inlet section 131 in series, and the U-shaped pipe 10 of the water inlet section 131 can be connected and communicated through a cross-pipe communicating piece 40, and the outlet of the U-shaped pipe 10 at the most upstream of the water outlet section 132 can be connected and communicated with two U-shaped pipes 10 connected in parallel at the downstream through a three-way piece 30.

In fig. 6, two first heat exchange tubes 110 are further disposed in the first zone 101, only the second heat exchange tube 120 is disposed in the upper second zone 102, and only the water outlet section 132 of the third heat exchange tube 130 is disposed in the lower second zone 102.

In some embodiments, the coil heat exchange assembly 100 further includes a water dividing and collecting member 140, the water dividing and collecting member 140 having a water inlet 143, a water outlet 144, a plurality of water inlet splits and a plurality of water outlet splits, the inlet of the first heat exchange tube 110, the inlet of the second heat exchange tube 120 and the inlet of the third heat exchange tube 130 being respectively in communication with the water inlet 143 through at least one water inlet split, the outlet of the first heat exchange tube 110, the outlet of the second heat exchange tube 120 and the outlet of the third heat exchange tube 130 being respectively in communication with the water outlet 144 through at least one water outlet split, the number of water outlet splits being greater than the number of water inlet splits.

The water dividing and collecting member 140 is mounted at an end of the housing 160 in the third direction Z and is located outside the housing 160.

The inlet in the first heat exchange tube 110, the inlet in the second heat exchange tube 120, and the inlet in the third heat exchange tube 130 may be connected to the water inlet split-flow ports in one-to-one correspondence, respectively. The inlet of each first heat exchange tube 110 may be correspondingly provided with a water inlet split, the inlet of each second heat exchange tube 120 may be correspondingly provided with a water inlet split, and the inlet of each third heat exchange tube 130 may be correspondingly provided with a water inlet split. The outlets of the first heat exchange tube 110, the second heat exchange tube 120 and the third heat exchange tube 130 may be connected to the water outlet diversion ports in one-to-one correspondence, respectively. The outlet of each first heat exchange tube 110 may be correspondingly provided with a water outlet split, the outlet of each second heat exchange tube 120 may be correspondingly provided with a water outlet split, and the outlet of each third heat exchange tube 130 may be correspondingly provided with a plurality of water outlet split. The outlet section of the third heat exchange tube 130 may form a plurality of outlets by connecting a plurality of U-shaped tubes 10 in parallel, so that the number of water outlet ports is greater than the number of water inlet and water diversion ports.

It can be understood that the water flow inlet is less, the flow rate in the pipeline is high, the water flow inlet is intensively arranged at the position with higher air flow rate V, the water outlet 144 adopts parallel flow paths, the number of the flow paths is increased, the flow rate in the pipeline is relatively low, the overall water pressure drop can be balanced, and the water outlet 144 is dispersedly arranged at the position with lower air speed, so that the overall heat exchange capacity of the coil heat exchange assembly 100 can be increased, and the heat exchange efficiency is improved.

In some embodiments, as shown in fig. 1, the water inlet split-flow port is connected with a water inlet branch pipe 145, the water outlet split-flow port is connected with a water outlet branch pipe 146, the inlet of the first heat exchange tube 110, the inlet of the second heat exchange tube 120 and the inlet of the third heat exchange tube 130 are respectively communicated with the corresponding water inlet split-flow port through the water inlet branch pipe 145, and the outlet of the first heat exchange tube 110, the outlet of the second heat exchange tube 120 and the outlet of the third heat exchange tube 130 are respectively communicated with the corresponding water outlet split-flow port through the water outlet branch pipe 146.

In some embodiments, optionally, the coil heat exchange assembly 100 further includes a water collecting and separating member 140, the water collecting and separating member 140 having a water inlet channel 141 and a water outlet channel 142 isolated from each other, the water inlet 143 communicating with the water inlet channel 141, the water outlet 144 communicating with the water outlet channel 142, the inlet of the first heat exchange tube 110 and the inlet of the second heat exchange tube 120 communicating with the water inlet channel 141, and the outlet of the first heat exchange tube 110 and the outlet of the second heat exchange tube 120 communicating with the water outlet channel 142.

The inlet of the third heat exchange tube 130 may also be connected to the water inlet channel 141, and the outlet of the third heat exchange tube 130 may also be connected to the water outlet channel 142. The water dividing and collecting piece 140 can be integrally formed or assembled to form the water inlet channel 141 and the water outlet channel 142 which are independent.

The inlet of the first heat exchange tube 110, the inlet of the second heat exchange tube 120, and the inlet of the third heat exchange tube 130 may be directly connected to the water collecting and distributing member 140 and communicate with the water inlet channel 141, and the outlet of the first heat exchange tube 110, the outlet of the second heat exchange tube 120, and the outlet of the third heat exchange tube 130 may be directly connected to the water collecting and distributing member 140 and communicate with the water outlet channel 142. The inlet of the first heat exchange tube 110, the inlet of the second heat exchange tube 120 and the inlet of the third heat exchange tube 130 can be respectively connected with the water dividing and collecting member 140 through water inlet branch pipes 145 and communicated with the water inlet channel 141, and the outlet of the first heat exchange tube 110, the outlet of the second heat exchange tube 120 and the outlet of the third heat exchange tube 130 can be respectively connected with the water dividing and collecting member 140 through water outlet branch pipes 146 and communicated with the water outlet channel 142.

In some embodiments, the coil heat exchange assembly 100 further includes fins 150, and the first heat exchange tube 110, the second heat exchange tube 120, and the third heat exchange tube 130 may each be provided with fins 150, that is, all of the hairpin tubes 10 of the coil heat exchange assembly 100 may be provided with fins 150. The fins 150 may be provided with connection holes through which the hairpin tubes 10 pass so that the fins 150 are sleeved on the hairpin tubes 10. The fins 150 may be fixedly connected to the hairpin tube 10 by expansion or welding.

In some embodiments, the inlet of the first heat exchange tube 110 is located on a side of the outlet facing away from the airflow driving assembly 200 in a direction perpendicular to the second direction Y and the third direction Z, and the water flow direction a of the first heat exchange tube 110 is opposite to the airflow flow direction, i.e. flows in a direction opposite to the first direction X, to improve the heat exchange efficiency of the coil heat exchanger.

In some embodiments, the inlet of the second heat exchange tube 120 is located on a side of the outlet facing away from the airflow driving assembly 200 in a direction perpendicular to the second direction Y and the third direction Z, and the water flow direction a of the second heat exchange tube 120 is opposite to the air flow direction, i.e. flows in a direction opposite to the first direction X, to improve the heat exchange efficiency of the coil heat exchanger.

In some embodiments, the inlet of the third heat exchange tube 130 is located on a side of the outlet facing away from the airflow driving assembly 200 in a direction perpendicular to the second direction Y and the third direction Z, and the water flow direction a of the third heat exchange tube 130 is opposite to the air flow direction, i.e. flows in a direction opposite to the first direction X, to improve the heat exchange efficiency of the coil heat exchanger.

As shown in fig. 8, the coil heat exchange assembly 100 may not include the first heat exchange tube 110 and the second heat exchange tube 120, but may include only the third heat exchange tube 130.

Specifically, some embodiments of the present application provide a coil heat exchange assembly 100, where the coil heat exchange assembly 100 includes at least one third heat exchange tube 130, the third heat exchange tube 130 includes a water inlet segment 131 and a water outlet segment 132 that are connected, the water inlet segment 131 is connected to a water inlet 143 of the coil heat exchange assembly 100, the water outlet segment 132 is connected to a water outlet 144 of the coil heat exchange assembly 100, the water inlet segment 131 is disposed in the first zone 101, and the water outlet segment 132 is disposed in the second zone 102.

In one particular embodiment, shown in fig. 8, the coil heat exchange assembly 100 includes four third heat exchange tubes 130. Referring to fig. 7 and 8, two third heat exchange tubes 130 are arranged in the same manner, wherein the water inlet section 131 of each third heat exchange tube 130 comprises one U-shaped tube (defined as a first U-shaped tube 11 for convenience of description) located in the first zone 101, the water outlet section 132 of each third heat exchange tube 130 comprises three U-shaped tubes each located in the second zone 102 below, the inlet of one of the three U-shaped tubes (defined as a second U-shaped tube 12 for convenience of description) is connected in series with the first U-shaped tube 11, the other two of the three U-shaped tubes (defined as a third U-shaped tube 13 and a fourth U-shaped tube 14 for convenience of description) are connected in parallel with the outlet of the second U-shaped tube 12, and water flows from the water flow inlet 143 into the inlet of the first U-shaped tube 11, then flows through the first U-shaped tube 11, the second U-shaped tube 12, then is split into the third U-shaped tube 13 and the fourth U-shaped tube 14, and flows back out through the third U-shaped tube 13 and the fourth U-shaped tube 14 to the outlet 144 via the third U-shaped tube 13 and the fourth U-shaped tube 14. Referring to fig. 8, the other two third heat exchange tubes 130 are arranged in the same manner, in which the water inlet section 131 of each third heat exchange tube 130 includes two serially connected U-shaped tubes (for convenience of description, the U-shaped tubes are defined as a fifth U-shaped tube 15 and a sixth U-shaped tube 16, the outlet of the fifth U-shaped tube 15 is connected to and communicates with the inlet of the sixth U-shaped tube 16), the water outlet section 132 of each third heat exchange tube 130 includes two U-shaped tubes (for convenience of description, the seventh U-shaped tube 17 and the eighth U-shaped tube 18 are defined as a seventh U-shaped tube 17 and an eighth U-shaped tube 18), the seventh U-shaped tube 17 and the eighth U-shaped tube 18 are all located in the second zone 102 above, the seventh U-shaped tube 17 and the eighth U-shaped tube 18 are connected in parallel to the outlet of the sixth U-shaped tube 16, and water flows from the water inlet 143 into the inlet of the fifth U-shaped tube 15, then flows through the fifth U-shaped tube 15, the sixth U-shaped tube 16 in turn, and then splits into the seventh U-shaped tube 17 and the eighth U-shaped tube 18, and flows back out through the outlet of the seventh U-shaped tube 17 and the eighth U-shaped tube 18.

The arrangement of the fifth U-shaped tube 15, the sixth U-shaped tube 16, the seventh U-shaped tube 17, and the eighth U-shaped tube 18 can be understood approximately with reference to the structure shown in fig. 7.

Other specific arrangements of the third heat exchange tube 130 may be set with reference to the scheme of simultaneously arranging the first heat exchange tube 110 and the second heat exchange tube 120 in the coil heat exchange assembly 100, which is not described herein. It should be noted that, in the case where the coil heat exchange assembly 100 is provided with only the third heat exchange tube 130, the water inlet split-flow port of the split-water collecting member 140 may be provided with one, that is, the split-water collecting member 140 has the water inlet 143, the water outlet 144, at least one water inlet split-flow port and a plurality of water outlet split-flow ports, wherein the water inlet segment 131 communicates with the water inlet 143 through the water inlet split-flow port, the water outlet segment 132 communicates with the water outlet 144 through the water outlet split-flow port, and the number of the water outlet split-flow ports may be greater than the number of the water inlet split-flow ports.

According to the coil heat exchange assembly 100 of the present embodiment, since energy is lost when water flows in the third heat exchange tube 130, the flow rate of water at the inlet section is higher than the flow rate of water at the outlet section. In this embodiment, the inlet section of the third heat exchange tube 130 is disposed in the first region 101 with a higher airflow velocity V, the outlet section of the third heat exchange tube 130 is disposed in the second region 102 with a lower airflow velocity V, and the heat exchange efficiency of the heat exchange tube is proportional to the flow velocity between the inside and outside of the tube, and the temperature difference between the inside and outside of the tube is larger at the inlet section, and the airflow velocity V outside of the tube in the inlet section of the first region 101 is higher, so that the increase ratio of the heat exchange amount per unit area of the region is more, and in the same way, the airflow velocity V outside of the tube in the outlet section of the second region 102 is relatively lower, and the temperature difference between the inside and outside of the tube in the outlet section is relatively lower, so that the decrease ratio of the heat exchange amount per unit area of the region is less, so that the total heat exchange amount of the coil heat exchange assembly 100 is increased, and the heat exchange efficiency of the coil heat exchange assembly 100 is improved.

As shown in fig. 1, an embodiment of the present application further provides a coiled heat exchanger, including an airflow driving assembly 200 and a coiled heat exchange assembly 100 according to the present application or any embodiment of the present application, where the airflow driving assembly 200 is installed on one side of the coiled heat exchange assembly 100 along a first direction X.

The airflow drive assembly 200 may be a blower, which may be provided in one or more. The air flow drive assembly 200 may be coupled to the housing 160 of the coil heat exchange assembly 100.

The coil heat exchanger of this embodiment has the same beneficial effects as the coil heat exchange assembly 100 of the present application or any of the embodiments of the present application.

The embodiment of the application also provides heating and ventilation equipment, which comprises the coil heat exchanger provided by the application or any embodiment of the application.

The heating and ventilation device may also include other components, such as a heat exchange water supply system, the water outlet of which is connected to the water inlet 143 of the coil heat exchange assembly 100, the water inlet of which is connected to the water outlet 144 of the coil heat exchange assembly 100. The heat exchange water supply system is used for heating or cooling water flow, when the coil heat exchange assembly 100 is used for providing heating for the environment, the heat exchange water supply system is used for heating the water flow so as to provide hot water for the coil heat exchange assembly 100, the heat exchange water supply system can be provided with a heating device, such as a fuel gas heating device, an electric heating tube and the like, for heating the water flow, and when the coil heat exchange assembly 100 is used for providing cooling for the environment, the heat exchange water supply system can be used for cooling the water flow, and the heat exchange water supply system can be provided with a cooling device, such as an evaporator and the like, for cooling the water flow.

The present application is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims (13)

1. A coil heat exchange assembly for use in a coil heat exchanger having an air flow drive assembly for driving an air flow through the coil heat exchange assembly in a first direction, wherein the coil heat exchange assembly has a first region and a second region aligned in a second direction, wherein the air flow drive assembly creates an air flow rate in the first region that is higher than an air flow rate in the second region, and wherein the second direction intersects the first direction;

The heat exchange device comprises a coil heat exchange assembly, a water flow inlet, a water outflow outlet, a water flow inlet, a water flow outlet, a water flow inlet and a water flow outlet, wherein at least one first heat exchange tube is arranged in the first area, at least one second heat exchange tube is arranged in the second area, the first heat exchange tube and the second heat exchange tube are connected in parallel between the water flow inlet of the coil heat exchange assembly and the water outflow outlet of the coil heat exchange assembly, and the tube pass from the inlet to the outlet of the first heat exchange tube is smaller than the tube pass from the inlet to the outlet of any second heat exchange tube.

2. The coil heat exchange assembly of claim 1 wherein each of the first heat exchange tubes comprises a single U-shaped tube or a plurality of U-shaped tubes in series, each of the second heat exchange tubes comprises a plurality of U-shaped tubes in series, and the number of U-shaped tubes of the second heat exchange tubes is greater than the number of U-shaped tubes of the first heat exchange tubes, each of the U-shaped tubes extending in a third direction, the second direction, and the first direction intersecting one another.

3. The coil heat exchange assembly of claim 1 further comprising at least one third heat exchange tube, the first heat exchange tube, and the second heat exchange tube being connected in parallel between the water inlet and the water outlet, the third heat exchange tube comprising a water inlet section and a water outlet section in communication, the water inlet section in communication with the water inlet, the water outlet section in communication with the water outlet, the water inlet section disposed in the first zone, and the water outlet section disposed in the second zone.

4. A coil heat exchange assembly according to claim 3 wherein the area of the largest flow cross-section of the inlet section is less than or equal to the area of the smallest flow cross-section of the outlet section.

5. The coil heat exchange assembly of claim 4 wherein the water inlet section comprises a single U-shaped tube or a plurality of U-shaped tubes in series communication, the water outlet section comprises a plurality of parallel U-shaped tubes, the inlets of the plurality of parallel U-shaped tubes of the water outlet section are all in communication with the outlet of the water inlet section, each U-shaped tube extends in a third direction, and the third direction, the second direction and the first direction intersect in pairs.

6. The coil heat exchange assembly of any one of claims 1-5, wherein the second zone is provided in two, the first zone being disposed in a middle portion of the coil heat exchange assembly in the second direction, and the two second zones being disposed on opposite sides of the first zone, respectively, in the second direction.

7. The coil heat exchange assembly of any one of claims 3-5, further comprising a water dividing and collecting member having the water inlet, the water outlet, a plurality of water inlet splits and a plurality of water outlet splits, the inlet of the first heat exchange tube, the inlet of the second heat exchange tube and the inlet of the third heat exchange tube being in communication with the water inlet through at least one of the water inlet splits respectively, the outlet of the first heat exchange tube, the outlet of the second heat exchange tube and the outlet of the third heat exchange tube being in communication with the water outlet through at least one of the water outlet splits respectively, the number of water outlet splits being greater than the number of water inlet splits.

8. The coil heat exchange assembly of claim 7, wherein the inlet tap is connected with an inlet tap, the outlet tap is connected with an outlet tap, the inlet of the first heat exchange tube, the inlet of the second heat exchange tube and the inlet of the third heat exchange tube are respectively communicated with the corresponding inlet tap through the inlet tap, and the outlet of the first heat exchange tube, the outlet of the second heat exchange tube and the outlet of the third heat exchange tube are respectively communicated with the corresponding outlet tap through the outlet tap.

9. A coil heat exchange assembly for use in a coil heat exchanger having an air flow drive assembly for driving an air flow through the coil heat exchange assembly in a first direction, wherein the coil heat exchange assembly has a first region and a second region aligned in a second direction, wherein the air flow drive assembly creates an air flow rate in the first region that is higher than an air flow rate in the second region, and wherein the second direction intersects the first direction;

The coil heat exchange assembly comprises at least one third heat exchange tube, the third heat exchange tube comprises a water inlet section and a water outlet section which are communicated, the water inlet section is communicated with a water inlet of the coil heat exchange assembly, the water outlet section is communicated with a water outlet of the coil heat exchange assembly, the water inlet section is arranged in the first area, and the water outlet section is arranged in the second area.

10. The coil heat exchange assembly of claim 9 wherein the water inlet section comprises a single U-shaped tube or a plurality of U-shaped tubes in series communication, the water outlet section comprises a plurality of parallel U-shaped tubes, the inlets of the plurality of parallel U-shaped tubes of the water outlet section are all in communication with the outlet of the water inlet section, each U-shaped tube extends in a third direction, and the third direction, the second direction and the first direction intersect in pairs.

11. A coiled tube heat exchanger, comprising:

An air flow driving assembly;

The coil heat exchange assembly of any one of claims 1-10, the airflow drive assembly being disposed to one side of the coil heat exchange assembly in the first direction.

12. The coiled tube heat exchanger of claim 11, wherein, in the first direction, the inlet of the first heat exchange tube is located on a side of the outlet of the first heat exchange tube facing away from the airflow drive assembly;

And/or, along the first direction, the inlet of the second heat exchange tube is positioned at one side of the outlet of the second heat exchange tube, which is away from the airflow driving assembly.

13. A heating ventilation apparatus comprising a coiled heat exchanger according to claim 11 or 12.