WO2024098610A1 - Exhaust structure and heat exchanger - Google Patents

Abstract

An exhaust structure and a heat exchanger. The exhaust structure comprises a first manifold (100), a gas suction pipe (200), and a liquid outlet pipe (300); the first manifold (100) is provided in the vertical direction; the liquid outlet pipe (300) is provided between the top and the bottom of the first manifold (100) and communicated with the first manifold (100); along a liquid outflow direction of the liquid outlet pipe (300), the inner diameter of the liquid outlet pipe (300) is first gradually reduced and then gradually increased; one end of the gas suction pipe (200) is provided in the first manifold (100) and extends to the top of the first manifold (100) in the vertical direction, and the other end of the gas suction pipe (200) extends to a position having the smallest inner diameter of the liquid outlet pipe (300) and is communicated with the liquid outlet pipe (300).

Description

Exhaust structure and heat exchanger

Related Applications

This application claims priority to the Chinese patent application filed on November 8, 2022, with application number 202211390286.X and title “Exhaust Structure and Heat Exchanger”, the entire text of which is hereby incorporated by reference.

Technical Field

The present application relates to the technical field of heat exchangers, and in particular to an exhaust structure and a heat exchanger.

Background technique

Usually, the heat exchanger uses refrigerant as the medium for heat exchange. Since there is a large amount of air inside the heat exchanger, the heat exchanger needs to discharge the excess gas inside during the process of filling the refrigerant. In addition, since the gas density is relatively small, in order to discharge the gas in the heat exchanger, an exhaust pipe is usually set at the highest point of the heat exchanger. However, the setting of the exhaust pipe will increase the volume of the heat exchanger, thereby affecting the installation of the heat exchanger in the car.

Summary of the invention

According to various embodiments of the present application, an exhaust structure and a heat exchanger are provided to solve the problem that the existing exhaust method causes the volume of the heat exchanger to increase, thereby affecting the installation of the heat exchanger.

The exhaust structure provided in the present application includes a first collecting pipe, an air intake pipe and a liquid outlet pipe. The first collecting pipe is arranged along the vertical direction, the liquid outlet pipe is arranged between the top and the bottom of the first collecting pipe and is connected to the first collecting pipe. Along the liquid outlet direction of the liquid outlet pipe, the inner diameter of the liquid outlet pipe shows a trend of gradually decreasing first and then gradually increasing. One end of the air intake pipe is arranged in the first collecting pipe and extends to the top of the first collecting pipe along the vertical direction, and the other end of the air intake pipe extends to the position where the inner diameter of the liquid outlet pipe is the smallest and is connected to the liquid outlet pipe.

In one embodiment, the exhaust structure further includes a suspension collar, which is sleeved on one end of the air intake pipe extending into the first manifold and is movably sealed with the outer wall of the air intake pipe, and the density of the suspension collar is defined as p, and the density of the fluid in the first manifold is defined as q, p and q satisfy the following relationship: 0.99q≤p<q, and the end of the air intake pipe extending toward the top of the first manifold is vertically arranged, and the thickness of the suspension collar along the vertical direction is greater than the distance between the top of the air intake pipe and the highest point in the first manifold. It can be understood that such an arrangement can completely discharge the gas in the first manifold, and the liquid in the first manifold will not enter the air intake pipe, effectively avoiding the residual gas in the first manifold.

In one embodiment, the liquid outlet pipe includes a contraction section and an expansion section which are sequentially connected along the liquid outlet direction, and, Along the liquid discharge direction of the liquid outlet pipe, the inner diameter of the contraction section gradually decreases, and the inner diameter of the expansion section gradually increases. The inclination of the inner wall of the contraction section relative to the axis of the liquid outlet pipe is greater than the inclination of the inner wall of the expansion section relative to the axis of the liquid outlet pipe. It can be understood that such a configuration can reduce the length of the contraction section, thereby reducing the length of the entire liquid outlet pipe, and further reducing the volume of the exhaust structure. Moreover, such a configuration can prevent the liquid from forming a reflux vortex at the expansion section, resulting in turbulence in the liquid outlet pipe.

In one embodiment, along the liquid outflow direction of the liquid outlet pipe, the inner wall of the contraction section extends in a straight line.

In one embodiment, along the liquid outflow direction of the liquid outflow pipe, the inner wall of the contraction section extends in a curve.

In one embodiment, the inner wall of the liquid outlet pipe is provided with a groove, and the end of the suction pipe extending into the liquid outlet pipe is partially inserted into the groove, and the axis of the end of the suction pipe extending into the liquid outlet pipe is a tangent line of the inner wall at the connection between the contraction section and the expansion section. It can be understood that such an arrangement can make the gas in the first manifold be sucked into the liquid outlet pipe faster.

In one embodiment, the slot is arranged at the top of the liquid outlet pipe. It is understandable that such arrangement can minimize the volume occupied by the suction pipe in the liquid outlet pipe, and the suction pipe interferes with the flow of liquid in the liquid outlet pipe.

In one embodiment, the liquid outlet pipe further includes a first straight pipe section, a second straight pipe section and a third straight pipe section, and the first header, the first straight pipe section, the contraction section, the third straight pipe section, the expansion section and the second straight pipe section are sequentially connected along the liquid outlet direction. It can be understood that such an arrangement reduces the difficulty of assembling the liquid outlet pipe, the first header and the external pipeline.

In one embodiment, the vertical height of the liquid outlet pipe is defined as h. The total height of the first header along the vertical direction is defined as H, and h and H satisfy the following relationship: 0.2H<h<0.5H. It can be understood that such a configuration greatly enhances the rate at which the air intake pipe discharges the gas in the first header.

In one embodiment, h and H satisfy the following relationship: h=0.3H.

The present application also provides a heat exchanger, which includes a liquid inlet pipe, a second header, a core and an exhaust structure as described in any one of the above embodiments, wherein the liquid inlet pipe is arranged between the top and the bottom of the second header and is connected to the second header, and the core is arranged between the first header and the second header and is connected to the first header and the second header.

The details of one or more embodiments of the present application are set forth in the following drawings and description. Other features, objects, and advantages of the present application will become apparent from the description, drawings, and claims.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

FIG1 is a schematic structural diagram of a heat exchanger according to an embodiment of the present application.

FIG. 2 is an exploded view of a heat exchanger according to an embodiment of the present application.

FIG. 3 is a schematic diagram of a partial structure of an exhaust structure according to an embodiment of the present application.

FIG. 4 is an enlarged view of point A shown in FIG. 3 .

FIG. 5 is an enlarged view of point B shown in FIG. 3 .

FIG6 is a cross-sectional view of an exhaust structure located at a liquid outlet pipe according to an embodiment of the present application.

FIG. 7 is a partial cross-sectional view of an exhaust structure according to an embodiment of the present application.

Figure numerals: 100, first collecting pipe; 200, air intake pipe; 210, anti-rotation slope; 220, clamping ring; 300, liquid outlet pipe; 310, contraction section; 311, clamping groove; 320, expansion section; 330, first straight pipe section; 340, second straight pipe section; 350, third straight pipe section; 400, stopper head; 410, connecting groove; 500, buckle; 600, liquid inlet pipe; 700, second collecting pipe; 800, core body; 900, suspension ring.

Detailed ways

The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships 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 referred device or element 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 addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In this application, unless otherwise clearly specified and limited, a first feature can be "above" or "below" a second feature. The first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and/or" used herein includes any and all combinations of one or more of the related listed items.

Usually, the heat exchanger uses refrigerant as the medium for heat exchange. Since there is a large amount of air inside the heat exchanger, the heat exchanger needs to discharge the excess gas inside during the process of filling the refrigerant. In addition, since the gas density is relatively small, in order to discharge the gas in the heat exchanger, an exhaust pipe is usually set at the highest point of the heat exchanger. However, the setting of the exhaust pipe will increase the volume of the heat exchanger, thereby affecting the installation of the heat exchanger in the car.

Please refer to Figures 1 to 7. In order to solve the problem that the existing exhaust method causes the volume of the heat exchanger to increase and thus affects the installation of the heat exchanger, the present application provides an exhaust structure, which includes a first collecting pipe 100, an intake pipe 200 and a liquid outlet pipe 300. The first collecting pipe 100 is arranged along the vertical direction, and the liquid outlet pipe 300 is arranged between the top and the bottom of the first collecting pipe 100 and connected to the first collecting pipe 100. Along the liquid outlet direction of the liquid outlet pipe 300, the inner diameter of the liquid outlet pipe 300 shows a trend of first gradually decreasing and then gradually increasing. One end of the intake pipe 200 is arranged in the first collecting pipe 100 and extends to the top of the first collecting pipe 100 along the vertical direction. The other end of the intake pipe 200 extends to the position where the inner diameter of the liquid outlet pipe 300 is the smallest and is connected to the liquid outlet pipe 300.

Since the inner diameter of the liquid outlet pipe 300 first gradually decreases and then gradually increases along the liquid outlet direction of the liquid outlet pipe 300, when the liquid enters the liquid outlet pipe 300 from the first collecting pipe 100 and flows along the liquid outlet direction of the liquid outlet pipe 300, the flow rate of the liquid first increases and then decreases, and the flow rate of the liquid reaches the maximum at the position where the inner diameter of the liquid outlet pipe 300 is the smallest. It can be seen from the Venturi effect that low pressure will be generated near the high-speed flowing fluid, thereby generating an adsorption effect, and the gas located at the top of the first collecting pipe 100 will be squeezed by the liquid. In this way, by setting the air intake pipe 200, the gas located at the top of the first collecting pipe 100 can be sucked into the liquid outlet pipe 300 through the air intake pipe 200 and carried away by the liquid in the liquid outlet pipe 300. Since one end of the air intake pipe 200 is arranged in the first collecting pipe 100, and the other end is arranged in the liquid outlet pipe 300, therefore, the air intake pipe 200 is arranged in the first collecting pipe 100. Placing the air intake pipe 200 does not increase the volume of the exhaust structure or even the entire heat exchanger, so that not only can the gas in the heat exchanger be effectively discharged, but also the difficulty in installing the heat exchanger due to the excessive volume of the heat exchanger can be avoided.

It should be emphasized that in this application document, fluid includes but is not limited to refrigerant.

Specifically, the air intake duct 200 is L-shaped as a whole.

In one embodiment, as shown in FIG. 6 , the liquid outlet pipe 300 includes a contraction section 310 and an expansion section 320 which are sequentially connected along the liquid outlet direction, and along the liquid outlet direction of the liquid outlet pipe 300, the inner diameter of the contraction section 310 gradually decreases, and the inner diameter of the expansion section 320 gradually increases, and the inclination degree of the inner wall of the contraction section 310 relative to the axis of the liquid outlet pipe 300 is greater than the inclination degree of the inner wall of the expansion section 320 relative to the axis of the liquid outlet pipe 300.

It should be noted that the inclination of the inner wall of the contraction section 310 relative to the axis of the liquid outlet pipe 300 is greater than the inclination of the inner wall of the expansion section 320 relative to the axis of the liquid outlet pipe 300, which means that the contraction amplitude of the inner diameter of the contraction section 310 is more drastic, and the expansion amplitude of the inner diameter of the expansion section 320 is more gradual.

Such a configuration can reduce the length of the contraction section 310, thereby reducing the length of the entire liquid outlet pipe 300, and further reducing the volume of the exhaust structure. In addition, such a configuration can prevent the liquid from forming a reflux vortex at the expansion section 320, resulting in turbulence in the liquid outlet pipe 300.

Specifically, in one embodiment, along the liquid outflow direction of the liquid outlet pipe 300, the inner wall of the contraction section 310 can extend in a straight line or in a curve. Similarly, along the liquid outflow direction of the liquid outlet pipe 300, the inner wall of the expansion section 320 can extend in a straight line or in a curve.

In one embodiment, as shown in Figures 6 and 7, the inner wall of the liquid outlet pipe 300 is provided with a groove 311, and the end of the intake pipe 200 extending into the liquid outlet pipe 300 is partially inserted into the groove 311, and the axis of the end of the intake pipe 200 extending into the liquid outlet pipe 300 is a tangent to the inner wall at the connection between the contraction section 310 and the expansion section 320.

The inner wall at the junction of the contraction section 310 and the expansion section 320 is subjected to the strongest suction force. Therefore, such a configuration allows the gas in the first manifold 100 to be sucked into the liquid outlet pipe 300 more quickly. In addition, the provision of the clamping groove 311 can prevent the air intake pipe 200 from rotating in the liquid outlet pipe 300, thereby improving the stability of the exhaust structure.

Furthermore, in one embodiment, the card slot 311 is disposed at the top of the liquid outlet pipe 300 .

In this way, the volume occupied by the air intake pipe 200 in the liquid outlet pipe 300 can be minimized, and the air intake pipe 200 can be prevented from interfering with the flow of liquid in the liquid outlet pipe 300. In addition, such an arrangement can prevent the gas from continuing to float up in the liquid outlet pipe 300 and causing the gas to flow back into the first manifold 100.

Furthermore, in one embodiment, as shown in FIG. 6 , the liquid outlet pipe 300 also includes a first straight pipe section 330, a second straight pipe section 340 and a third straight pipe section 350, and the first collecting pipe 100, the first straight pipe section 330, the contraction section 310, the third straight pipe section 350, the expansion section 320 and the second straight pipe section 340 are connected in sequence along the liquid outlet direction.

In this way, the liquid outlet pipe 300 can be assembled to the first manifold 100 through the first straight pipe section 330, and the liquid outlet pipe 300 The second straight pipe section 340 can be assembled to the external pipeline, and such an arrangement reduces the difficulty of assembling the exhaust structure.

In order to increase the discharge rate of the gas in the first header 100, in one embodiment, the vertical height of the liquid outlet pipe 300 is defined as h, and the total height of the first header 100 along the vertical direction is defined as H, and h and H satisfy the following relationship: 0.2H<h<0.5H.

Due to the existence of gravity, the descending speed of the liquid in the first manifold 100 is greater than the rising speed of the liquid in the first manifold 100. Through a large number of simulation experiments, it is concluded that the intersection point of the descending liquid and the rising liquid in the first manifold 100 is between one-fifth and one-half the height of the first manifold 100, and when the descending liquid and the rising liquid immediately enter the liquid inlet pipe 600 after the intersection, the kinetic energy loss of the liquid in the first manifold 100 is minimized, that is, the vertical height of the liquid outlet pipe 300 is set between one-fifth and one-half the height of the first manifold 100, which can minimize the kinetic energy loss of the liquid in the first manifold 100, that is, the liquid in the liquid outlet pipe 300 can obtain the maximum flow rate. On the contrary, if the descending liquid and the ascending liquid cannot enter the liquid outlet pipe 300 immediately after they meet, the liquid after the meeting needs to continue to rise or fall, so that the liquid after the meeting will continue to collide with the ascending liquid or the descending liquid before entering the liquid outlet pipe 300, and at this time, the kinetic energy of the liquid in the first manifold 100 will be further lost. In summary, it can be seen that such a setting can maximize the flow rate of the liquid in the liquid outlet pipe 300, that is, it can maximize the pressure difference between the gas at the top of the first manifold 100 and the fluid at the minimum inner diameter of the liquid inlet pipe 600, that is, it greatly enhances the rate at which the air intake pipe 200 discharges the gas in the first manifold 100.

Further, in one embodiment, h and H satisfy the following relationship: h=0.3H.

In order to further increase the exhaust rate of the gas in the first manifold 100, in one embodiment, a spiral groove (not shown) is provided on the inner wall of the air intake pipe 200 so that the gas can rotate into the liquid outlet pipe along the spiral groove.

Under the action of the Coriolis force, after the gas enters the intake pipe 200 from one end of the intake pipe 200 close to the top of the first collecting pipe 100, it will form a vortex along the spiral groove. If it is in the northern hemisphere, the vortex will rotate counterclockwise under the action of the Coriolis force. If it is in the southern hemisphere, the vortex will rotate clockwise under the action of the Coriolis force. Therefore, with such a setting, the Coriolis force will enhance the gas vortex in the intake pipe 200, thereby increasing the flow rate of the gas in the intake pipe 200, and then improving the discharge rate of the gas in the first collecting pipe 100.

Specifically, in one embodiment, the inner wall of the air intake pipe 200 is provided with a spiral protrusion (not shown), and adjacent spiral protrusions and the inner wall of the air intake pipe 200 are surrounded to form a spiral groove.

In this way, the processing difficulty of the spiral groove is greatly reduced.

In one embodiment, as shown in FIG. 4 , an end of the intake pipe 200 extending to the top of the first collecting pipe 100 is provided with a stop bevel 210, and a stop head 400 is provided at the top of the first collecting pipe 100 corresponding to the stop bevel 210. The stop heads 400 are stopped at both ends of the stop bevel 210 along the circumference of the intake pipe 200 to prevent the intake pipe 200 from rotating around its own axis.

In this way, the air intake pipe 200 can be prevented from rotating around its own axis, greatly improving the assembly firmness of the exhaust structure. Spend.

Specifically, in one embodiment, the stop head 400 is provided with a matching inclined surface (not shown) corresponding to the anti-rotation inclined surface 210 , and the stop head 400 is fitted into the anti-rotation inclined surface 210 via the matching inclined surface.

In this way, the matching tightness between the stopper head 400 and the air intake pipe 200 is improved.

Further, in one embodiment, as shown in Figure 4, the stop head 400 is provided with a connecting groove 410, the connecting groove 410 includes a first opening provided at the bottom of the stop head 400 and a second opening provided at the side of the stop head 400, the connecting groove 410 is connected to the intake pipe 200 through the first opening, and the connecting groove 410 is connected to the first collecting pipe 100 through the second opening.

In this way, the stopper head 400 is prevented from affecting the air intake pipe 200 in absorbing the gas in the first header 100 .

In one embodiment, as shown in Figures 3 and 5, the exhaust structure also includes a plurality of clips 500, one end of the clip 500 is detachably connected to the inner wall of the first collecting pipe 100, and the other end is clipped to the outer wall of the intake pipe 200, and the plurality of clips 500 are arranged at intervals along the extension direction of the intake pipe 200.

In this way, the air intake pipe 200 is prevented from shaking in the first header 100, thereby improving the stability of the exhaust structure.

Furthermore, in one embodiment, as shown in FIG. 5 , a plurality of snap rings 220 are disposed on the outer wall of the air intake pipe 200 , and the plurality of snap rings 220 are stopped at both sides of the buckle 500 along the extending direction of the air intake pipe 200 .

In this way, the intake pipe 200 can be prevented from moving up and down in the first header 100 .

In this embodiment, the buckle 500 can also cooperate with the stopper head 400 to limit the up and down movement of the air intake pipe 200 .

Usually, if the distance between the end of the intake pipe 200 extending to the top of the first collecting pipe 100 and the top end surface of the first collecting pipe 100 is too large, liquid will be sucked into the intake pipe 200, which will cause a large amount of gas to exist at the top of the first collecting pipe 100 and cannot be discharged. Conversely, if the distance between the end of the intake pipe 200 extending to the top of the first collecting pipe 100 and the top end surface of the first collecting pipe 100 is too small, the gas at the top of the first collecting pipe 100 will be difficult to be sucked into the intake pipe 200, which will cause the gas discharge efficiency to be too low.

In order to solve the problem that the distance between one end of the intake pipe 200 extending to the top of the first collecting pipe 100 and the top end face of the first collecting pipe 100 is difficult to control, in one embodiment, the exhaust structure also includes a suspension ring (not shown), which is sleeved on the end of the intake pipe 200 extending into the first collecting pipe 100 and movably sealed with the outer wall of the intake pipe 200, and the density of the suspension ring is defined as p, and the density of the fluid in the first collecting pipe 100 is defined as q, p and q satisfy the following relationship: 0.99q≤p<q, and the end of the intake pipe 200 extending toward the top of the first collecting pipe 100 is vertically arranged, and the thickness of the suspension ring along the vertical direction is greater than the distance between the top of the intake pipe 200 and the highest point in the first collecting pipe 100.

Since the end of the air intake pipe 200 extending toward the top of the first header 100 is vertically arranged, and the suspension ring is sleeved on the end of the air intake pipe 200 extending into the first header 100 and movably cooperates with the outer wall of the air intake pipe 200, the suspension ring can move up and down along the extension direction of the air intake pipe 200. In addition, since the density p of the suspension ring and the density q of the fluid in the first header 100 satisfy 0.99q≤p<q, the suspension ring can be suspended in the liquid, and the suspension ring Thus, as the gas in the first manifold 100 is gradually discharged, the liquid level in the first manifold 100 gradually rises, and at this time, the suspension ring also gradually moves toward the top of the air intake pipe 200 along the extension direction of the air intake pipe 200 . Because the thickness of the suspension ring in the vertical direction is greater than the distance between the top of the intake pipe 200 and the highest point in the first collecting pipe 100, when the liquid level in the first collecting pipe 100 is higher than the top of the intake pipe 200, the highest point of the suspension ring will also rise with the liquid level to a position higher than the top of the intake pipe 200. Combined with the movable sealing cooperation between the suspension ring and the outer wall of the intake pipe 200, at this time, the liquid cannot enter the intake pipe 200, that is, the intake pipe 200 still sucks in the gas in the first collecting pipe 100, that is, the remaining gas in the first collecting pipe 100 will continue to enter the intake pipe 200 through the suspension ring until the gas in the first collecting pipe 100 is completely discharged. At this time, the suspension sleeve rises to the top of the first collecting pipe 100.

From the above, it can be known that by providing the suspension collar, the gas in the first header 100 can be completely discharged, and the liquid in the first header 100 will not enter the intake pipe 200, thereby effectively avoiding the residual gas in the first header 100.

Please refer to Figures 1 and 2. The present application also provides a heat exchanger, which includes a liquid inlet pipe 600, a second header 700, a core 800 and an exhaust structure as described in the above embodiments. The liquid inlet pipe 600 is arranged between the top and the bottom of the second header 700 and is connected to the second header 700. The core 800 is arranged between the first header 100 and the second header 700 and is connected to the first header 100 and the second header 700.

Compared with the related art, the exhaust structure and heat exchanger provided by the present application have a tendency that the inner diameter of the liquid outlet pipe first gradually decreases and then gradually increases along the liquid outlet direction of the liquid outlet pipe. Therefore, when the liquid enters the liquid outlet pipe from the first collecting pipe and flows along the liquid outlet direction of the liquid outlet pipe, the flow rate of the liquid first increases and then decreases, and the flow rate of the liquid reaches the maximum at the position where the inner diameter of the liquid outlet pipe is the smallest. It can be seen from the Venturi effect that low pressure will be generated near a high-speed flowing fluid, thereby generating an adsorption effect. In the present application document, fluids include but are not limited to liquids. In addition, the gas located at the top of the first collecting pipe will be squeezed by the liquid. In this way, by setting an air intake pipe, the gas located at the top of the first collecting pipe can be sucked into the liquid outlet pipe through the air intake pipe and carried away by the liquid in the liquid outlet pipe. Since one end of the intake pipe is arranged in the first collecting pipe and the other end is arranged in the liquid outlet pipe, the provision of the intake pipe will not increase the volume of the exhaust structure or even the entire heat exchanger. In this way, not only can the gas in the heat exchanger be effectively discharged, but also the difficulty in installing the heat exchanger due to the large volume of the heat exchanger can be avoided.

The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims (11)

An exhaust structure, characterized in that the exhaust structure includes a first collecting pipe, an air intake pipe and a liquid outlet pipe, the first collecting pipe is arranged along the vertical direction, the liquid outlet pipe is arranged between the top and the bottom of the first collecting pipe and is connected to the first collecting pipe, along the liquid outlet direction of the liquid outlet pipe, the inner diameter of the liquid outlet pipe shows a trend of gradually decreasing first and then gradually increasing, one end of the air intake pipe is arranged in the first collecting pipe and extends to the top of the first collecting pipe along the vertical direction, and the other end of the air intake pipe extends to the position where the inner diameter of the liquid outlet pipe is the smallest and is connected to the liquid outlet pipe. The exhaust structure according to claim 1, wherein it also includes a suspension ring, which is sleeved on one end of the intake pipe extending into the first collecting pipe and is movably sealed with the outer wall of the intake pipe, and the density of the suspension ring is defined as p and the density of the fluid in the first collecting pipe is defined as q, and p and q satisfy the following relationship: 0.99q≤p<q, and the end of the intake pipe extending toward the top of the first collecting pipe is vertically arranged, and the thickness of the suspension ring along the vertical direction is greater than the distance between the top of the intake pipe and the highest point in the first collecting pipe. According to the exhaust structure of claim 1, wherein the liquid outlet pipe comprises a contraction section and an expansion section which are sequentially connected along the liquid outlet direction, and along the liquid outlet direction of the liquid outlet pipe, the inner diameter of the contraction section gradually decreases, the inner diameter of the expansion section gradually increases, and the inclination degree of the inner wall of the contraction section relative to the axis of the liquid outlet pipe is greater than the inclination degree of the inner wall of the expansion section relative to the axis of the liquid outlet pipe. The exhaust structure according to claim 3, wherein the inner wall of the contraction section extends in a straight line along the liquid outlet direction of the liquid outlet pipe. The exhaust structure according to claim 3, wherein the inner wall of the contraction section extends in a curve along the liquid outlet direction of the liquid outlet pipe. According to the exhaust structure of claim 3, the inner wall of the liquid outlet pipe is provided with a groove, the end of the air intake pipe extending into the liquid outlet pipe is partially inserted into the groove, and the axis of the end of the air intake pipe extending into the liquid outlet pipe is a tangent of the inner wall at the connection between the contraction section and the expansion section. The exhaust structure according to claim 6, wherein the slot is provided at the top of the liquid outlet pipe. The exhaust structure according to claim 3, wherein the liquid outlet pipe further comprises a first straight pipe section, a second straight pipe section and a third straight pipe section, and the first collecting pipe, the first straight pipe section, the contraction section, the third straight pipe section, the expansion section and the second straight pipe section are sequentially connected along the liquid outlet direction. The exhaust structure according to claim 1, wherein the vertical height of the liquid outlet pipe is defined as h, the total height of the first collecting pipe along the vertical direction is defined as H, and h and H satisfy the following relationship: 0.2H<h<0.5H. The exhaust structure according to claim 9, wherein said h and said H satisfy the following relationship: h=0.3H. A heat exchanger, characterized in that it comprises a liquid inlet pipe, a second header, a core and an exhaust structure, wherein the liquid inlet pipe is arranged between the top and the bottom of the second header and is connected to the second header, the core is arranged between the first header and the second header and is connected to the first header and the second header, Among them, the exhaust structure includes a first collecting pipe, an air intake pipe and a liquid outlet pipe, the first collecting pipe is arranged along the vertical direction, the liquid outlet pipe is arranged between the top and the bottom of the first collecting pipe and is connected to the first collecting pipe, along the liquid outlet direction of the liquid outlet pipe, the inner diameter of the liquid outlet pipe shows a trend of gradually decreasing first and then gradually increasing, one end of the air intake pipe is arranged in the first collecting pipe and extends to the top of the first collecting pipe along the vertical direction, and the other end of the air intake pipe extends to the position where the inner diameter of the liquid outlet pipe is the smallest and is connected to the liquid outlet pipe.