CN114383442A

CN114383442A - Heat exchanger and motor vehicle air conditioning system

Info

Publication number: CN114383442A
Application number: CN202111525526.8A
Authority: CN
Inventors: 熊俊; 丁天毅; 褚树宝; 李爽; 戴天翔
Original assignee: Zhejiang Yinlun New Energy Thermal Management System Co ltd
Current assignee: Zhejiang Yinlun New Energy Thermal Management System Co ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-04-22

Abstract

The invention discloses a heat exchanger and a motor vehicle air conditioning system, belonging to the technical field of heat exchange equipment, wherein the heat exchanger comprises: the shell comprises a side plate assembly and a first cover plate assembly, the side plate assembly surrounds a heat exchange cavity and comprises a first side plate, the end part of the first side plate protrudes from inside to outside to form a convex hull, a first inlet for a first fluid to flow in is formed in the convex hull, and the first cover plate assembly covers the port of the heat exchange cavity; the spoiler is arranged between the convex hull and the heat exchange cavity, and encloses a stagnation cavity capable of reserving the first fluid with the convex hull and the first cover plate assembly, and a circulation port is arranged at the part, close to the first cover plate assembly, of the spoiler, so that the first fluid flows into the heat exchange cavity through the stagnation cavity. Set up the spoiler in addition in the casing, when first fluid flowed in, by the spoiler choked flow, be detained in staying the chamber, during the rethread circulation mouth flowed in the heat transfer chamber, reduced the flow that gets into to reduce the velocity of flow, improved the space utilization in heat transfer chamber, the heat transfer is more abundant, promotes the heat transfer effect.

Description

Heat exchanger and motor vehicle air conditioning system

Technical Field

The invention relates to the technical field of heat exchange equipment, in particular to a heat exchanger and a motor vehicle air conditioning system.

Background

Heat exchangers, also known as heat exchangers or heat exchange devices, are devices for transferring heat from a hot fluid to a cold fluid to meet specified process requirements, an industrial application of which is the convective and conductive transfer of heat. The heat exchanger comprises a shell and a core body, wherein a heat exchange cavity is arranged in the shell, the core body is arranged in the heat exchange cavity, a refrigerant flows in a heat exchange tube of the core body, a cooling liquid flows between the heat exchange tubes, and heat exchange between the refrigerant and the cooling liquid is realized through the tube wall of the heat exchange tube. The entry and the export of coolant liquid are seted up on the curb plate of casing, with heat transfer chamber intercommunication, and a large amount of coolant liquid are direct by the entry flow in the heat transfer chamber, or directly flow out by the exit from the heat transfer chamber, and the flow is great, and the velocity of flow is very fast, and the heat transfer effect is relatively poor.

Disclosure of Invention

The object of the present invention is to disclose a heat exchanger and a motor vehicle air conditioning system, which at least partially solve the above problems.

In view of the above, it is necessary to provide a heat exchanger and an air conditioning system for a motor vehicle, which can exchange heat more sufficiently and effectively.

In order to solve the technical problems, the invention adopts the following technical scheme:

a heat exchanger, the heat exchanger comprising:

the shell comprises a side plate assembly and a first cover plate assembly, the side plate assembly surrounds a heat exchange cavity, the side plate assembly comprises a first side plate, the end part of the first side plate protrudes from inside to outside to form a convex hull, a first inlet for the first fluid to flow in is formed in the convex hull, and the first cover plate assembly covers the port of the heat exchange cavity;

the spoiler is established the convex closure with between the heat transfer chamber, and with the convex closure first apron subassembly encloses into and to be able to stay the chamber that stagnates of first fluid, just the spoiler is close to first apron subassembly department is equipped with the circulation mouth, so that the first fluid warp it flows into to stagnate the chamber in the heat transfer chamber.

The beneficial effect of this scheme of adoption:

based on among the prior art during coolant liquid directly gets into the heat transfer chamber, cause the relatively poor problem of heat transfer effect, in this scheme, establish the spoiler in addition in the casing, and make spoiler and convex closure, first apron subassembly encloses into and detains the chamber, thereby when first fluid flows in by first entry, can not directly flow in the heat transfer chamber, but by the spoiler choked flow, be detained in staying the chamber, the rethread flows through the mouth and slowly flows in the heat transfer chamber and exchanges heat, thereby the flow of the first fluid that gets into the heat transfer chamber has been reduced, and the velocity of flow has been reduced, the space utilization in heat transfer chamber has been improved, and simultaneously, first fluid also can not directly flow out by first export, but by the spoiler choked flow, the degree of difficulty that first fluid flows has been increased, thereby it is long when extension first fluid flows in the heat transfer chamber, make the heat transfer more abundant, promote the heat transfer effect.

In one embodiment, a gap is left between the spoiler and the first cover plate assembly, the gap forming the flow opening.

In one embodiment, the convex hull is further provided with a first outlet through which the first fluid flows out, the retention cavity is provided with a partition, the partition divides the retention cavity into a fluid inlet retention cavity and a fluid outlet retention cavity, the fluid inlet retention cavity is communicated with the first inlet, and the fluid outlet retention cavity is communicated with the first outlet.

In one embodiment, at least one partition plate is arranged in the heat exchange cavity, the heat exchange cavity is divided into at least a first heat exchange cavity and a second heat exchange cavity which are communicated with each other by the at least one partition plate, the first heat exchange cavity is communicated with the liquid inlet stagnation cavity, the second heat exchange cavity is communicated with the liquid outlet stagnation cavity, and the flowing direction of the first fluid in the first heat exchange cavity is opposite to the flowing direction of the first fluid in the second heat exchange cavity.

In one embodiment, the heat exchanger further comprises a core body, the core body is accommodated in the heat exchange cavity, the core body comprises a plurality of heat exchange tubes, a first fluid channel is formed among the heat exchange tubes, a second fluid channel is formed inside the heat exchange tubes, the first fluid channel is not communicated with the second fluid channel, the partition plate divides the plurality of heat exchange tubes into at least a first heat exchange tube unit and a second heat exchange tube unit, the first heat exchange tube unit is located in the first heat exchange cavity, the second heat exchange tube unit is located in the second heat exchange cavity, and the first fluid and the second fluid both flow reversely in the first heat exchange cavity and the second heat exchange cavity.

In one embodiment, two ends of the heat exchange tube are respectively arranged in the first cover plate assembly and the second cover plate assembly, the first cover plate assembly is provided with a second inlet for the inflow of the first inserted fluid and a second outlet for the outflow of the second fluid, the first heat exchange tube unit is communicated with the second outlet, the second heat exchange tube unit is communicated with the second inlet, and the second cover plate assembly is provided with a turning groove for communicating the first heat exchange tube unit with the second heat exchange tube unit; or the two ends of the heat exchange tube are respectively inserted into the first cover plate assembly and the second cover plate assembly, the second cover plate assembly is provided with a second inlet for the second fluid to flow in and a second outlet for the second fluid to flow out, the first heat exchange tube unit is communicated with the second inlet, the second heat exchange tube unit is communicated with the second outlet, and the first cover plate assembly is provided with a steering groove for communicating the first heat exchange tube unit with the second heat exchange tube unit.

In one embodiment, the divider plate projects outwardly proximate the stagnation chamber and across the spoiler to form the divider.

In one embodiment, the spoiler comprises a first spoiler and a second spoiler which are arranged in a split manner, the side plate assembly further comprises a second side plate and a third side plate which are distributed on two sides of the first side plate, the first spoiler extends from the second side plate to the third side plate, and the second spoiler extends from the third side plate to the second side plate; alternatively, the spoiler is integrally formed.

In one embodiment, the side plate assembly further comprises a fourth side plate arranged opposite to the first side plate, both sides of the first side plate and the fourth side plate are provided with guard plates, and the guard plates of the first side plate and the fourth side plate are spliced.

The other technical scheme adopted by the invention is as follows:

an automotive air conditioning system comprising a heat exchanger as described in any one of the preceding claims.

These features and advantages of the invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

Drawings

The invention is further described with reference to the accompanying drawings in which:

fig. 1 is a schematic perspective view of a heat exchanger according to the present invention.

Fig. 2 is an exploded view of the heat exchanger of the present invention.

FIG. 3 is a partial schematic view of the heat exchanger of the present invention with the first cover plate assembly removed.

FIG. 4 is a partial schematic view of the heat exchanger of the present invention with the second cover plate assembly removed.

FIG. 5 is a schematic view of the structure of the partition plate of the present invention.

Fig. 6 is a cross-sectional view of the heat exchanger of the present invention in one direction.

Fig. 7 is a partial enlarged view of a portion a in fig. 6.

Fig. 8 is a partial enlarged view of fig. 6 at B.

Fig. 9 is a cross-sectional view of a heat exchanger housing of the present invention.

Fig. 10 is a cross-sectional view of the heat exchanger of the present invention in another direction, wherein the partition plate is not provided with the second through-holes.

Fig. 11 is a cross-sectional view of the heat exchanger of the present invention in another direction, wherein the partition plate is provided with second through-holes.

Fig. 12 is a schematic view of the internal decomposition of the heat exchanger of the present invention with two divider plates.

Fig. 13 is a schematic view of the internal decomposition of the heat exchanger of the present invention with three divider plates.

Reference numerals:

100. a side plate assembly; 110. a first side plate; 111. a first convex hull; 1111. a first inlet; 1112. a first outlet; 112. a second convex hull; 120. a second side plate; 121. a first separator; 1211. a first spoiler; 1212. a first baffle plate; 130. a third side plate; 131. a second separator; 1311. a second spoiler; 1312. a second baffle; 140. a fourth side plate; 150. a guard plate; 210. a first cover plate assembly; 211. a second fixing plate; 2111. a second liquid inlet jack; 2112. a second liquid outlet jack; 2113. a fourth reinforcing portion; 212. a first baffle; 2121. a first liquid inlet diversion hole; 2122. a first liquid outlet diversion hole; 2123. the fifth Qiangjian part; 213. a second baffle; 2131. a second liquid inlet diversion hole; 2132. a second liquid outlet diversion hole; 2133. a sixth reinforcing portion; 214. a first cover plate; 2141. a second inlet; 2142. a second outlet; 220. a second cover plate assembly; 221. a first fixing plate; 2211. a first liquid inlet jack; 2212. a first liquid outlet jack; 2213. a third reinforcing portion; 222. a drainage plate; 2221. a liquid inlet drainage hole; 2222. liquid outlet drainage holes; 2223. a second reinforcement portion; 223. a diversion plate; 2231. a first through hole; 2232. a first reinforcing portion; 224. a second cover plate; 2232. a first reinforcing portion; 230. a jack; 300. a heat exchange cavity; 310. a first heat exchange chamber; 320. a second heat exchange chamber; 400. a retention cavity; 410. entering the liquid and reserving the stagnation cavity; 420. discharging liquid and reserving a stagnation cavity; 500. a first circulation port; 600. a partition plate; 610. a partition portion; 620. a notch; 630. inserting a block; 640. a second through hole; 700. a core body; 710. a first heat exchange tube; 711. a first channel; 720. a second heat exchange tube; 721. a second channel; 800. a second flow port; 900. a liquid collection cavity; 910. a first liquid collection chamber; 920. and a second liquid collection cavity.

Detailed Description

The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The invention is described by taking a heat exchanger of an air conditioning system of a motor vehicle as an example, but a person skilled in the art can understand that the invention can also be applied to other air conditioning systems and even other non-air conditioning heat exchange equipment.

The main components of the motor vehicle air conditioning system comprise a compressor, a condenser, a throttling device and a heat exchanger, wherein the heat exchanger plays a role of heat exchange with the outside, the heat exchanger is used for heat exchange of a first fluid and a second fluid with temperature difference and comprises a shell and a core body 700, a heat exchange cavity 300 is arranged in the shell, the core body 700 is arranged in the heat exchange cavity 300, the core body 700 comprises a plurality of heat exchange tubes, turbulence fins are arranged between the adjacent heat exchange tubes, a first fluid channel is formed between the heat exchange tubes, a second fluid channel is formed inside the heat exchange tubes, the first fluid channel is not communicated with the second fluid channel, and heat exchange between the first fluid and the second fluid is realized through the tube walls of the heat exchange tubes. The second fluid in the present invention is a refrigerant, preferably CO₂The refrigerant and the first fluid are cooling liquid flowing out of the air conditioning pipeline, and the cooling liquid after heat exchange flows into a battery of the motor vehicle to provide cooling for the battery of the motor vehicle.

Referring to fig. 1 to 4, the casing includes a side plate assembly 100 and a cover plate assembly, the side plate assembly 100 further includes a first side plate 110, a second side plate 120, a third side plate 130 and a fourth side plate 140, the second side plate 120 and the third side plate 130 are disposed at two sides of the first side plate 110, the fourth side plate 140 is disposed at an opposite position of the first side plate 110, so that the first side plate 110, the second side plate 120, the third side plate 130 and the fourth side plate 140 enclose the heat exchange cavity 300. When the heat exchanger is used, the first side plate 110 is located above to form a top wall of the heat exchange cavity 300, and the fourth side plate 140 is located below to form a bottom wall of the heat exchange cavity 300.

The cover plate assembly specifically includes a first cover plate assembly 210 and a second cover plate assembly 220, the first cover plate assembly 210 and the second cover plate assembly 220 are covered on two sides of the heat exchange cavity 300 to form a closed heat exchange cavity 300, and the core 700 is placed in the closed heat exchange cavity 300.

The first inlet 1111 or the first outlet 1112 for allowing the cooling fluid to flow into or out of the heat exchange cavity 300 is disposed on the housing, for simplicity of description, the first inlet 1111 or the first outlet 1112 is disposed on the first side plate 110, in the conventional heat exchanger, the cooling fluid directly flows into the heat exchange cavity 300 from the first inlet 1111 or directly rushes out from the outlet of the heat exchange cavity 300, the flow rate is large, the flow rate is fast, the heat exchange effect is poor, and the heat exchange tube or the fourth side plate 140 or the component connected to the first outlet 1112 may be damaged by impact.

In order to solve the above problem, referring to fig. 1 to 3, 6, 7 and 9, in the present embodiment, one end of the first side plate 110 protrudes from inside to outside to form a convex hull, i.e., the first convex hull 111, the first cover plate assembly 210 is close to the first convex hull 111, and the second cover plate assembly 220 is far away from the first convex hull 111.

The first inlet 1111 is opened at the first convex hull 111, and a spoiler is disposed between the first convex hull 111 and the heat exchange cavity 300, the spoiler, the first convex hull 111 and the first cover plate assembly 210 enclose a stagnation chamber 400 capable of retaining the cooling fluid, and a flow port, i.e., a first flow port 500, is disposed at a position of the spoiler close to the first cover plate assembly 210, so that the cooling fluid flows into the heat exchange cavity 300 through the stagnation chamber 400.

In this scheme, set up the choke plate in addition in the casing, and make choke plate and first convex closure 111, first apron subassembly 210 encloses to become to stay and stagnates chamber 400, thereby when the coolant liquid flowed in by first entry 1111, can not directly flow in heat transfer chamber 300, but by the choke plate choked flow, be detained in staying and detain chamber 400, rethread first circulation mouth 500 slowly flows in heat transfer chamber 300 heat transfer, thereby the flow of the coolant liquid that gets into heat transfer chamber 300 has been reduced, and the velocity of flow has been reduced, the space utilization of heat transfer chamber 300 has been improved, and simultaneously, the coolant liquid also can not directly flow out by first export 1112, but by the choke plate choked flow, the degree of difficulty that the coolant liquid flows out has been increased, thereby it is long when the flow of extension coolant liquid in heat transfer chamber 300, make the heat transfer more abundant, promote the heat transfer effect.

Meanwhile, the spoiler has a buffering effect on the cooling liquid, slows down the flow velocity of the cooling liquid, reduces the impact force of the cooling liquid, and avoids damaging the heat exchange tube or the fourth side plate 140 or the component connected with the first outlet 1112.

As shown in fig. 7 and 9, in order to simplify the manufacturing process and ensure the strength of the spoiler, the length of the spoiler is controlled such that a gap is left between the spoiler and the first cover plate assembly 210, and the gap forms the first circulation opening 500. First circulation mouth 500 is located the spoiler tip, is located to stay chamber 400 diapire tip position department promptly to by the coolant liquid of first entry 1111 inflow compel earlier get into stay behind the chamber 400, in the rethread tip position inflow heat transfer chamber 300, extension coolant liquid flow stroke has increased the entering degree of difficulty, has further slowed down the velocity of flow of coolant liquid, is more convenient for control the flow of coolant liquid, guarantees the heat transfer effect.

Of course, in other embodiments, a gap may be additionally formed at a position on the spoiler corresponding to the heat exchange cavity 300, and the gap forms the first circulation port 500.

In a conventional heat exchanger, the first inlet 1111 and the first outlet 1112 are located at two sides of the casing, the cooling liquid flows in from one end of the casing, the cooling liquid flows out from the other end of the casing, the flow of the cooling liquid is a single flow, the heat exchange flow is short, the area is small, and the heat exchange effect is poor.

In order to solve the above problems, referring to fig. 2 to 5 and fig. 11 to 13, according to an embodiment of the present invention, a partition plate 600 is disposed in a heat exchange cavity 300, for convenience of description, a partition plate 600 is disposed in the heat exchange cavity 300 in this embodiment, the heat exchange cavity 300 is divided into two heat exchange cavities 300, namely, a first heat exchange cavity 310 and a second heat exchange cavity 320, by the partition plate 600, the first heat exchange cavity 310 and the second heat exchange cavity 320 form a circulation loop for flowing a cooling liquid, and the flow direction of the cooling liquid in the first heat exchange cavity 310 is opposite to the flow direction in the second heat exchange cavity 320, so that the flow of the cooling liquid is extended, the heat exchange area is increased, and the heat exchange effect is improved.

In order to make the cooling liquid flow out after exchanging heat in the circulation loop, the first outlet 1112 and the first inlet 1111 are disposed on the same side of the first side plate 110, that is, the first outlet 1112 is also disposed at the first convex hull 111, and the first outlet 1112 and the second heat exchange cavity 320 are also communicated through the stagnation cavity 400.

In order to separate the inflow and outflow of the coolant and prevent the coolant from mixing before and after heat exchange, as shown in fig. 2 and 3, a partition portion 610 is provided in the retention chamber 400, the partition portion 610 partitions the retention chamber 400 into an inflow retention chamber 410 and an outflow retention chamber 420, and the first circulation port 500 is also partitioned into a first inflow circulation port and a first outflow circulation port. The liquid inlet stagnation cavity 410 is respectively communicated with the first inlet 1111 and the first heat exchange cavity 310, and the high-temperature cooling liquid flows into the liquid inlet stagnation cavity 410 through the first inlet 1111 and then flows into the first heat exchange cavity 310 through the first liquid inlet circulation port; the liquid outlet stagnation chamber 420 is respectively communicated with the first outlet 1112 and the second heat exchange chamber 320, and the low-temperature cooling liquid after heat exchange flows into the liquid outlet stagnation chamber 420 through the first liquid outlet circulation port and then flows out through the first outlet 1112.

Meanwhile, as shown in fig. 2 to 4, fig. 10, and fig. 11, the heat exchange tubes of the core 700 are also divided into a first heat exchange tube unit and a second heat exchange tube unit by the partition plate 600, the first heat exchange tube unit is located in the second heat exchange cavity 320, the second heat exchange tube unit is located in the first heat exchange cavity 310, and both the coolant and the refrigerant flow in the reverse direction in the first heat exchange cavity 310 and the second heat exchange cavity 320, so as to enhance the heat exchange effect between the coolant and the refrigerant.

As shown in fig. 5, it is preferable that the partition portion 610 is integrally provided with the partition plate 600, and in particular, the partition plate 600 protrudes outward at a position near the retention chamber 400 and passes through the spoiler to form the partition portion 610, thereby simplifying the assembly process, and the partition portion 610 extends from the partition plate 600, thereby improving the stability of the partition portion 610 in the retention chamber 400.

Of course, in other embodiments, the partition 610 may be provided separately from the partition plate 600 to facilitate processing and installation.

In order to realize the communication between the first heat exchange chamber 310 and the second heat exchange chamber 320, in the prior art, a gap is left between the end of the separation plate 600 and the cover plate assembly to form a turning port, and the coolant flows into the second heat exchange chamber 320 from the turning port after exchanging heat with the first heat exchange chamber 310. Although the turning-around turning of the cooling liquid can be realized through the turning opening, the turning opening is distributed along the height direction of the separation plate 600 and is perpendicular to the flowing direction of the cooling liquid, the flow rates of the cooling liquid at different heights in the heat exchange cavity 300 are not completely the same, so that the temperature difference exists after the heat exchange of the refrigerant with different heights in the previous heat exchange cavity 300, and the temperature difference is increased after the refrigerant with the temperature difference respectively flows into the heat exchange in the next heat exchange cavity 300, so that the final heat exchange effect is seriously influenced. Meanwhile, the part of the cooling liquid at the bottom end of the heat exchange cavity 300 can be retained at the corner of the bottom end of the heat exchange cavity 300, so that effective heat exchange can not be carried out, and the whole heat exchange effect is influenced.

In order to solve the above problem, referring to fig. 1, 2, 4, 6, 8 and 9, according to an embodiment of the present invention, the other end of the first side plate 110 is also protruded from the inside to the outside to form a convex hull, i.e., the second convex hull 112, and the second cover plate assembly 220 is covered and disposed adjacent to the second convex hull 112.

In this embodiment, a baffle is additionally disposed between the second convex hull 112 and the heat exchange cavity 300, the baffle, the convex hull and the cover plate assembly enclose the liquid collection cavity 900, a communication port is disposed at a position of the baffle close to the cover plate assembly, that is, the second communication port 800, and the second communication port 800 communicates the heat exchange cavity 300 with the liquid collection cavity 900, so that the liquid collection cavity 900 collects the cooling liquid from the first heat exchange cavity 310 and distributes the cooling liquid to the second heat exchange cavity 320.

In the scheme, the baffle is additionally arranged in the shell, the baffle, the convex hull and the cover plate assembly are enclosed to form the liquid collecting cavity 900, the first heat exchange cavity 310 is communicated with the second heat exchange cavity 320 through the liquid collecting cavity 900, and the cooling liquid after heat exchange of the first heat exchange cavity 310 can flow into the second heat exchange cavity 320 through the liquid collecting cavity 900, so that the flow collection and redistribution of the cooling liquid are realized.

Meanwhile, the coolant flows through different positions of the first heat exchange cavity 310, the temperature difference is generated after heat exchange, different coolants with the temperature difference enter the liquid collection cavity 900 through the second circulation port 800 to be uniformly mixed, the temperature difference is eliminated, and the coolant enters the second heat exchange cavity 320 to exchange heat after reaching the same temperature, so that the temperature difference of the coolant after heat exchange at different positions of the second heat exchange cavity 320 is reduced, the temperature of the coolant finally flowing out of the heat exchange cavity 300 is more uniform, and the heat exchange effect is better.

Furthermore, in the scheme, the liquid collecting cavity 900 is used as cooling liquid to enter the second heat exchange cavity 320 from the first heat exchange cavity 310 to turn around and turn around, the positions are concentrated, meanwhile, the positions of an inlet and an outlet of the cooling liquid arranged on the shell are also concentrated, and the inlet, the outlet and the liquid collecting cavity 900 with the concentrated positions have the functions of drainage and diversion, so that the cooling liquid flows in the direction of the inlet-liquid collecting cavity 900-outlet or the direction of the inlet-liquid collecting cavity 900-outlet under the suction force of the air conditioner compressor, the retention of the cooling liquid in corners of the heat exchange cavity 300 is reduced or even avoided, the effective heat exchange amount of the cooling liquid is enhanced, and the heat exchange effect is enhanced.

And both ends respectively with first apron subassembly 210 and second apron subassembly 220 butt and sealed cooperation about division board 600, prevent that the coolant liquid from flowing through from the curb plate tip, and division board 600 both ends are inserted and are located in first apron subassembly 210 and the second apron subassembly 220 to improve the stability of division board 600 installation, specifically, be equipped with inserted block 630 on the division board 600 left and right sides respectively, be equipped with respectively on first apron subassembly 210 and the second apron subassembly 220 and supply the inserted jack 230 of inserted block 630.

As shown in fig. 6, 8 and 9, in order to simplify the process and to secure the strength of the baffle plate, the length of the baffle plate is controlled so that a gap is formed between the baffle plate and the second cover plate assembly 220, and the gap forms the second communication hole 800. Second circulation opening 800 is located the baffle tip, is located collection liquid chamber 900 diapire tip position department promptly to the coolant liquid of the different temperatures that flows in by first heat transfer chamber 310 is compelled to get into collection liquid chamber 900 by collection liquid chamber 900 tip earlier and is mixed, and the back that the temperature is even, reentrant second heat transfer chamber 320, extension coolant liquid flow stroke, reinforcing heat transfer effect.

Of course, in other embodiments, a slit may be additionally formed at a position corresponding to the liquid collection chamber 900 on the baffle plate, and the slit may form the second communication port 800.

As shown in fig. 4 and 5, the partition plate 600 protrudes outward from a position close to the liquid collection chamber 900 and penetrates through the baffle plate to divide the liquid collection chamber 900 into a first liquid collection chamber 910 and a second liquid collection chamber 920, the first liquid collection chamber 910 is communicated with the first heat exchange chamber 310, the second liquid collection chamber 920 is communicated with the second heat exchange chamber 320, and the baffle plate is provided with a liquid passing port at the position of the liquid collection chamber 900 to communicate the first liquid collection chamber 910 with the second liquid collection chamber 920. The position where the partition plate 600 penetrates into the liquid collecting cavity 900 is provided with a notch 620, and the second convex hull 112 covers the opening of the notch 620 to form the liquid passing port.

Meanwhile, the partition plate 600 also divides the second flow port 800 into a second liquid inlet flow port and a second liquid outlet flow port, the second liquid inlet flow port communicates the first liquid collecting chamber 910 with the first heat exchange chamber 310, and the second liquid outlet flow port communicates the second liquid collecting chamber 920 with the second heat exchange chamber 320.

The cooling liquid after heat exchange in the first heat exchange cavity 310 flows into the first liquid collecting cavity 910 through the second liquid inlet flow port, and flows into the second heat exchange cavity 320 through the liquid inlet after mixing, and flows into the second heat exchange cavity 320 through the second liquid outlet flow port for heat exchange.

There is pressure differential in first heat transfer chamber 310 and second heat transfer chamber 320 in the coolant flow in-process, leads to the sign that the coolant liquid in the second heat transfer chamber 320 backward flows in to first heat transfer chamber 310, especially to the great heat exchanger of volume, for the convenience of processing and assembly, every row of heat exchange tube includes the heat exchange tube that at least two set up side by side from top to bottom to coolant liquid in the second heat transfer chamber 320 flows through the heat exchange tube that goes upward after, can be along the clearance between two lines of heat exchange tubes to division board 600 department backward flow, and then backward flow in to collecting liquid chamber 900, influence heat transfer effect. When the second through hole 640 is not formed in the prior art partition plate 600, the flow of the coolant is as shown in fig. 10.

Therefore, in this embodiment, as shown in fig. 5, a row of through holes, i.e., second through holes 640, is disposed at a position of the partition plate 600 close to the second cover plate assembly 220 to balance a pressure difference between the first heat exchange cavity 310 and the second heat exchange cavity 320, so that the cooling liquid in the second heat exchange cavity 320 smoothly flows to the ascending heat exchange tubes after flowing through the ascending heat exchange tubes, thereby completing the heat exchange. Meanwhile, in the first heat exchange cavity 310, the coolant in the first fluid channel between the separation plate 600 and the heat exchange tube adjacent thereto may also flow into the second heat exchange cavity 320 through the second through hole 640, and in the second heat exchange cavity 320, the first fluid channel between the separation plate 600 and the heat exchange tube adjacent thereto is also filled with the coolant, thereby effectively preventing the coolant in the second heat exchange cavity 320 from flowing back. After the partition plate 600 is provided with the second through hole 640, the flow of the coolant is as shown in fig. 11.

As shown in fig. 6 and 9, the stagnation chamber 400 and the liquid collecting chamber 900 are both located above the heat exchange chamber 300, and both ends of the first heat exchange chamber 310 are respectively communicated with the liquid inlet stagnation chamber 410 and the first liquid collecting chamber 910, and under the action of flow guiding, the path of the cooling liquid in the first heat exchange chamber 310 is approximately arc-shaped, so that the cooling liquid passes through the middle part of the heat exchange tube in a large area, the heat exchange effect is ensured, meanwhile, the cooling liquid is reduced or even prevented from flowing into the bottom corner of the first liquid collecting chamber 910, and the heat exchange effect is influenced by stagnation or deposition in the corner. Similarly, two ends of the second heat exchange chamber 320 are respectively communicated with the second liquid collecting chamber 920 and the liquid outlet heat exchange chamber 300, and the flow path and the generating effect of the cooling liquid in the second heat exchange chamber 320 are similar to those in the first heat exchange chamber 310, which is not repeated herein.

In this embodiment, as shown in fig. 9, it is preferable that the baffle plate and the baffle plate are integrally disposed and located at two ends of the same partition plate, the baffle plate and the baffle plate respectively extend into the first convex hulls 111 and the second convex hulls 112 at two ends, and the connecting plate on the partition plate connecting the baffle plate and the baffle plate is closely attached to the first side plate 110 to form a blocking portion, so as to prevent the stagnation chamber 400 from communicating with the liquid collecting chamber 900.

In this embodiment, the partition board is preferably a split structure, specifically, as shown in fig. 2, the partition board includes a first partition board 121 and a second partition board 131, the first partition board 121 extends from the second side board 120 toward the third side board 130, and the second partition board 131 extends from the third side board 130 toward the second side board 120. The first partition plate 121 and the second partition plate 131 are respectively spliced on two sides of the partition plate 600, the first partition plate 121 is located at one end of the first convex hull 111 to form a first baffle 1211, the first partition plate 121 is located at one end of the second convex hull 112 to form a first baffle 1212, the second partition plate 131 is located at one end of the first convex hull 111 to form a second baffle 1311, and the second partition plate 131 is located at one end of the second convex hull 112 to form a second baffle 1312.

Of course, in other embodiments, the partition plate may be a whole plate formed integrally, and both sides of the whole plate may be connected to the second side plate 120 and the third side plate 130, or may be provided independently from the other side plates.

Of course, in other embodiments, the spoiler and the baffle may be separate pieces and attached to the respective ends of the connecting plate.

Both sides of the first side plate 110 and the fourth side plate 140 are provided with the protection plate 150, and the protection plates 150 of the first side plate 110 and the fourth side plate 140 are spliced and blocked outside the second side plate 120 and the third side plate 130, so as to realize the stability of the assembled first side plate 110, second side plate 120, third side plate 130 and fourth side plate 140.

The flowing process of the cooling liquid in the heat exchanger is as follows:

the cooling liquid flows into the liquid inlet stagnation chamber 410 from the first inlet 1111 and flows into the first heat exchange chamber 310 from the first liquid inlet flow port for heat exchange, the cooling liquid after heat exchange flows into the first liquid collecting chamber 910 from the second liquid inlet flow port for mixing, flows into the second liquid collecting chamber 920 through the liquid inlet, flows into the first heat exchange chamber 310 from the second liquid outlet flow port for heat exchange, and flows out from the first outlet 1112 after flowing into the liquid outlet stagnation chamber 420 from the first liquid outlet flow port for mixing.

Certainly, the number of the partition plates 600 is not limited to 1, in other embodiments, the number of the partition plates 600 may also be two or more, the two or more partition plates 600 partition the heat exchange cavity 300 into three or more heat exchange cavities 300 which are communicated with each other, and three or more flow channels for flowing and heat exchanging of the cooling liquid are formed, so as to further prolong the flow of the cooling liquid, increase the heat exchange area, and improve the heat exchange effect. At this time, the liquid collecting chambers 900 are disposed at both ends of the heat exchange chamber 300, the first heat exchange chamber 310 is communicated with the first inlet 1111, the last heat exchange chamber 300 is communicated with the first outlet 1112, when the number of the partition plates 600 is odd, the first inlet 1111 and the first outlet 1112 are disposed at the same end of the first side plate 110, and when the number of the partition plates 600 is even, the first inlet 1111 and the first outlet 1112 are disposed at both ends of the first side plate 110, respectively.

The partition plate 600 also divides the plurality of heat exchange tubes of the core 700 into a first heat exchange tube unit and a second heat exchange tube unit, the first heat exchange tube unit is located in the second heat exchange cavity 320, the second heat exchange tube unit is located in the first heat exchange cavity 310, the first heat exchange tube unit comprises at least one row of first heat exchange tubes 710, preferably a plurality of rows of first heat exchange tubes 710, the second heat exchange tube unit comprises at least one row of second heat exchange tubes 720, preferably a plurality of rows of second heat exchange tubes 720, the first heat exchange tubes 710 and the second heat exchange tubes 720 are arranged side by side, each first heat exchange tube 710 is provided with a plurality of first channels 711, and each second heat exchange tube 720 is provided with a plurality of second channels 721.

One end of the heat exchange tube assembly is hermetically inserted into the first cover plate assembly 210, and the first cover plate assembly 210 is provided with a liquid inlet, i.e., a second inlet 2141, through which the refrigerant flows.

The other end of the heat exchange tube assembly is hermetically inserted in the second cover plate assembly 220, the second cover plate assembly 220 comprises a diversion plate unit, a diversion groove is formed in the diversion plate unit, the diversion groove in the prior art is a groove formed in the cover plate assembly, all channels of the first heat exchange tube unit and the second heat exchange tube unit are communicated with the diversion groove, liquid is collected and redistributed in the diversion groove, the strength of the cover plate assembly is greatly reduced due to the arrangement of the groove, and the cover plate assembly is easily broken in a high-pressure use environment of the heat exchanger.

In view of the above problem, referring to fig. 2, according to an embodiment of the present invention, a plurality of diversion grooves are formed at intervals on the diversion plate unit, and each diversion groove communicates with the first channel 711 and the second channel 721 opposite to each other, so that the first channel 711 and the second channel 721 form a circulation circuit for circulating a refrigerant, and a first reinforcing portion 2232 is formed between adjacent diversion grooves.

The diversion grooves on the second cover plate assembly 220 in this embodiment are multiple and arranged at intervals, each diversion groove only communicates with one row of the first channels 711 and the second channels 721, so that the refrigerant flows into the second channels 721 in the same row from the first channels 711, and the first reinforced portions 2232 are formed at the portions between the adjacent diversion grooves on the second cover plate assembly 220, so that the strength of the cover plate assembly is improved, the diversion grooves are not easily broken under a high-pressure environment, the diversion grooves can be better applied to a heat exchanger, the stability inside the heat exchanger is ensured, the heat exchanger can be normally used, and the service life of the heat exchanger is prolonged.

For convenience of description, in this embodiment, a partition plate 600 is disposed in the heat exchange cavity 300, and the core 700 includes only a first heat exchange tube unit and a second heat exchange tube unit, and a liquid outlet for flowing out the refrigerant, i.e., a second outlet 2142, is also disposed on the first cover plate 214 unit. The heat exchange tube assembly preferably has a plurality of rows of first heat exchange tubes 710 and a plurality of rows of second heat exchange tubes 720.

As shown in fig. 2, the second cover plate assembly 220 includes a first fixing plate 221, a flow guide plate 222, a flow diverting plate 223 and a second cover plate 224, which are closely arranged in sequence.

The first fixing plate 221 is provided with a plurality of first insertion holes corresponding to the drainage holes, each first insertion hole comprises a first liquid inlet insertion hole 2211 and a first liquid outlet insertion hole 2212, each first liquid inlet insertion hole 2211 is internally provided with a row of first heat exchange tubes 710 in a sealed insertion mode, each first liquid outlet insertion hole 2212 is internally provided with a row of second heat exchange tubes 720 in a sealed insertion mode, a third reinforcing portion 2213 is formed between every two adjacent first insertion holes, and the strength of the first fixing plate 221 is enhanced through the third reinforcing portion 2213.

The drainage plate 222 is provided with a plurality of drainage holes, which include liquid inlet drainage holes 2221 and liquid outlet drainage holes 2222, wherein each liquid inlet drainage hole 2221 corresponds to each first liquid inlet insertion hole 2211 one to one, and each liquid outlet drainage hole 2222 corresponds to each first liquid outlet insertion hole 2212 one to one. Each of the liquid-inlet drainage holes 2221 communicates the drainage groove with the row of first heat exchange tubes 710 to drain the refrigerant in the first heat exchange tubes 710 into the drainage groove, each of the liquid-outlet drainage holes 2222 communicates the drainage groove with the row of second heat exchange tubes 720 to drain the refrigerant in the drainage groove into the second heat exchange tubes 720, second reinforcement portions 2223 are formed between adjacent drainage holes, and the strength of the drainage plate 222 is enhanced by the second reinforcement portions 2223.

The diversion plate 223 and the second cover plate 224 form a diversion cover plate, the diversion plate 223 is disposed between the second cover plate 224 and the heat exchange tube assembly, the diversion plate 223 is provided with a first through hole 2231, the second cover plate 224 is disposed on the runner plate and covers the first through hole 2231 to form the diversion groove, the second cover plate 224 is a whole plate, and the first reinforcing portion 2232 is directly formed on the diversion plate 223 adjacent to the first through hole 2231.

In this embodiment, the diversion plate 223 and the second cover plate 224 are separately disposed to form the diversion cover plate, but in other embodiments, the diversion plate 223 and the second cover plate 224 may also be integrally formed to form a whole plate body, and a plurality of diversion grooves are formed on one side of the plate body facing the drainage plate 222.

As shown in fig. 2, the first cover plate assembly 210 includes a first cover plate 214, a baffle assembly and a second fixing plate 211 attached in sequence, and the second inlet 2141 and the second outlet 2142 are opened on the first cover plate 214.

The second fixing plate 211 is provided with a plurality of second insertion holes, each second insertion hole includes a second liquid inlet insertion hole 2111 and a second liquid outlet insertion hole 2112, each second liquid inlet insertion hole 2111 is hermetically inserted with a row of first heat exchange tubes 710, each second liquid outlet insertion hole 2112 is hermetically inserted with a row of second heat exchange tubes 720, and a fourth reinforcing portion 2113 is formed between every two adjacent second insertion holes to reinforce the strength of the second fixing plate 211.

In one embodiment, the baffle assembly includes a first baffle 212 and a second baffle 213, the first baffle 212 is disposed between the second retaining plate 211 and the second baffle 213. The first guide plate 212 is provided with a plurality of first guide holes, each first guide hole comprises a first liquid inlet guide hole 2121 and a first liquid outlet guide hole 2122, the first liquid inlet guide holes 2121 are correspondingly matched with the second liquid inlet insertion holes 2111, each first liquid inlet guide hole 2121 is communicated with a row of first heat exchange tubes 710, the first liquid outlet guide holes 2122 are correspondingly matched with the second liquid outlet insertion holes 2112, each first liquid outlet guide hole 2122 is communicated with a row of second heat exchange tubes 720, and a fifth reinforcing part 2123 is formed between every two adjacent first guide holes to enhance the strength of the first guide plate 212.

The second flow guiding plate 213 is disposed between the first cover plate 214 and the first flow guiding plate 212, the second flow guiding plate 213 is provided with a plurality of second flow guiding holes, the extending direction of the second flow guiding holes is perpendicular to the extending direction of the first flow guiding holes, the second flow guiding holes include second liquid inlet flow guiding holes 2131 and second liquid outlet flow guiding holes 2132, the second liquid inlet flow guiding holes 2131 are communicated with the first channels 711 in the rows of first heat exchanging pipes 710, the second liquid outlet flow guiding holes 2132 are communicated with the second channels 721 in the rows of second heat exchanging pipes 720, specifically, the second liquid inlet flow guiding holes 2131 are communicated with the high-relative positions in the first liquid inlet flow guiding holes 2121, and the second liquid outlet flow guiding holes 2132 are communicated with the high-relative positions in the first liquid outlet flow guiding holes 2122. Sixth reinforcement portions 2133 are formed between adjacent second baffle holes to reinforce the strength of the second baffle 213.

The extending direction of the first flow guiding hole is perpendicular to the extending direction of the second flow guiding hole, and the fifth reinforcing part 2123 is also perpendicular to the sixth reinforcing part 2133, so that the fifth reinforcing part 2123 has a further reinforcing effect on the position of the second flow guiding hole, and similarly, the sixth reinforcing part 2133 also has a further reinforcing effect on the first flow guiding hole, so that the strength of the flow guiding plate assembly is further enhanced, and the flow guiding plate assembly is more suitable for being used in a high-pressure environment.

One second liquid inlet guide hole 2131 is communicated with the second inlet 2141, and the shape of the position, corresponding to the second inlet 2141, on the second liquid inlet guide hole 2131 is correspondingly matched with the shape of the second inlet 2141, so as to increase the inflow of the refrigerant.

Similarly, one second liquid outlet guide hole 2132 is communicated with the second outlet 2142, and the shape of the position, corresponding to the second outlet 2142, on the second liquid outlet guide hole 2132 is also correspondingly matched with the shape of the second outlet 2142, so as to increase the outflow of the refrigerant.

Thus, the refrigerant flowing in from the second inlet 2141 is sequentially distributed into the first channels 711 of each row of the first heat exchange tubes 710 by the cooperation of the second liquid introduction guide hole 2131 with the first liquid introduction guide holes 2121. Similarly, the second liquid guiding hole 2132 cooperates with the first liquid guiding hole 2122 to collect the refrigerant flowing through the second channel 721 of each row of the second heat exchanging tubes 720 to the second outlet 2142.

In summary, the strength of the second cover plate assembly 220 is enhanced by the first, second and

third reinforcements

2232, 2223 and 2213, and the first cover plate assembly 210 is also enhanced by the fourth, fifth and

sixth reinforcements

2113, 2123 and 2133, so that they are not easily broken under high-pressure working environment, and thus can be better applied to a heat exchanger, so as to ensure the stability of the inside of the heat exchanger, enable the heat exchanger to be used normally and prolong the service life of the heat exchanger.

In this embodiment, the first cover plate assembly 210 with the second inlet 2141 and the second outlet 2142 is located at the same end of the heat exchanger as the first convex hull 111 with the first liquid inlet and the first liquid outlet, in order to realize that the cooling liquid and the refrigerant both flow reversely in the first heat exchange cavity 310 and the second heat exchange cavity 320, the second inlet 2141 and the first liquid outlet are located at the same side of the partition plate 600, and the second outlet 2142 and the first liquid inlet are located at the same side of the partition plate 600.

At this time, at the diversion point of the second cover plate assembly 220, the flow of the refrigerant and the cooling liquid is also in a reverse direction, so that the flow of the refrigerant and the cooling liquid is in a reverse direction in the whole process, so as to form a complete counter-flow heat exchanger.

The flowing process of the refrigerant in the heat exchanger is as follows:

the refrigerant enters the first liquid inlet guide holes 2121 corresponding to the second inlet 2141 from the second inlet 2141, flows into the plurality of first liquid inlet guide holes 2121 through the first liquid inlet guide holes 2121, and is introduced into the plurality of first channels 711 of each row of first heat exchange tubes 710 through each first liquid inlet guide hole 2121, so that uniform distribution of the refrigerant among the plurality of first channels 711 of each row of first heat exchange tubes 710 is achieved. Meanwhile, the plurality of first liquid guiding holes 2121 also guide the refrigerant into other first liquid guiding holes 2121, and then uniformly distribute the refrigerant into the first channels 711 in the same row of the first heat exchanging pipes 710.

Then, after heat exchange, the refrigerant in each row of the first heat exchange tubes 710 flows into each liquid inlet conduction hole 2221, the refrigerant in the position corresponding to the first channels 711 in the same row in the plurality of liquid inlet conduction holes 2221 enters one diversion groove and flows into the plurality of liquid outlet conduction holes 2222, and flows into each row of the second heat exchange tubes 720 through each liquid outlet conduction hole 2222, so that the diversion of the refrigerant in the plurality of rows of the first channels 711 is realized through the plurality of diversion grooves.

Finally, after heat exchange, the refrigerant in each row of second heat exchange tubes 720 flows into each first liquid outlet and flow guiding hole 2222, is uniformly mixed, flows into the second liquid outlet and flow guiding holes 2222 corresponding to the second outlets 2142 through the plurality of first liquid outlet and flow guiding holes 2222, and then flows out through the second outlets 2142. Meanwhile, in the second heat exchange tubes 720, the refrigerant in the first channels 711 in the same row also flows into the second liquid outlet and flow guide holes 2222, and after being uniformly mixed, the refrigerant flows into the first liquid outlet and flow guide holes 2222, flows into the second liquid outlet and flow guide holes 2222 corresponding to the second outlets 2142 through the first liquid outlet and flow out through the second outlets 2142.

According to an embodiment of the present invention, the first cover plate assembly 210 with the second inlet 2141 and the second outlet 2142 and the first convex hull 111 with the first inlet and the first outlet are respectively located at two ends of the heat exchanger, and at this time, although the refrigerant and the cooling liquid flow in the first heat exchange cavity 310 and the second heat exchange cavity 320 in the opposite direction, the refrigerant and the cooling liquid flow in the same direction at the turning position of the second cover plate assembly 220, thereby forming an incomplete counter-flow heat exchanger.

Referring to fig. 12 and 13, the number of the partition plates 600 is not limited to 1, and may be two or more, and the two or more partition plates 600 divide the plurality of heat exchange tubes into three or more heat exchange units communicated with each other, so as to further extend the flow path of the cooling liquid, increase the heat exchange area, and improve the heat exchange effect. At this time, the two ends of the heat exchange cavity 300 are respectively provided with a diversion groove, the first heat exchange tube unit is communicated with the second inlet 2141, the last heat exchange unit is communicated with the second outlet 2142, when the number of the separation plates 600 is an odd number, the second inlet 2141 and the second outlet 2142 are both located on the first cover plate assembly 210, and when the number of the separation plates 600 is an even number, the second inlet 2141 and the second outlet 2142 are respectively located on the first cover plate assembly 210 and the second cover plate assembly 220.

However, no matter the number of the partition plates 600 is one or two or more, as long as the first liquid inlet and the second inlet 2141 are located at the same end of the heat exchanger, the heat exchanger is a complete counter-flow heat exchanger; when the first inlet 2141 and the second inlet 2141 are located at two ends of the heat exchanger, the heat exchanger is an incomplete counter-flow heat exchanger.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

While the foregoing is directed to embodiments of the present invention, the scope of the invention should not be limited thereby, and it will be apparent to those skilled in the art that the invention includes, but is not limited to, those illustrated in the drawings and described in the foregoing detailed description. Any modification which does not depart from the functional and structural principles of the invention is intended to be included within the scope of the claims.

Claims

1. A heat exchanger, characterized in that the heat exchanger comprises:

2. The heat exchanger of claim 1, wherein a gap is left between the spoiler and the first cover plate assembly, the gap forming the flow port.

3. The heat exchanger according to claim 1, wherein a first outlet for the first fluid to flow out is further provided at the convex hull, a partition is provided in the retention chamber, the partition divides the retention chamber into a fluid inlet retention chamber and a fluid outlet retention chamber, the fluid inlet retention chamber is communicated with the first inlet, and the fluid outlet retention chamber is communicated with the first outlet.

4. The heat exchanger according to claim 3, wherein at least one partition plate is disposed in the heat exchange chamber, the at least one partition plate divides the heat exchange chamber into at least a first heat exchange chamber and a second heat exchange chamber which are communicated with each other, the first heat exchange chamber is communicated with the liquid inlet stagnation chamber, the second heat exchange chamber is communicated with the liquid outlet stagnation chamber, and the first fluid flows in the first heat exchange chamber in a direction opposite to that of the second heat exchange chamber.

5. The heat exchanger of claim 4, further comprising a core, wherein the core is accommodated in the heat exchange cavity, the core comprises a plurality of heat exchange tubes, a first fluid channel is formed between the heat exchange tubes, a second fluid channel is formed inside the heat exchange tubes, the first fluid channel is not communicated with the second fluid channel, the partition plate divides the plurality of heat exchange tubes into at least a first heat exchange tube unit and a second heat exchange tube unit, the first heat exchange tube unit is located in the first heat exchange cavity, the second heat exchange tube unit is located in the second heat exchange cavity, and the first fluid and the second fluid both flow in opposite directions in the first heat exchange cavity and the second heat exchange cavity.

6. The heat exchanger according to claim 5, wherein both ends of the heat exchange tube are respectively inserted into the first cover plate assembly and the second cover plate assembly, the first cover plate assembly is provided with a second inlet for the inflow of the second fluid and a second outlet for the outflow of the second fluid, the first heat exchange tube unit is communicated with the second outlet, the second heat exchange tube unit is communicated with the second inlet, and the second cover plate assembly is provided with a turning groove for communicating the first heat exchange tube unit with the second heat exchange tube unit; or the two ends of the heat exchange tube are respectively inserted into the first cover plate assembly and the second cover plate assembly, the second cover plate assembly is provided with a second inlet for the second fluid to flow in and a second outlet for the second fluid to flow out, the first heat exchange tube unit is communicated with the second inlet, the second heat exchange tube unit is communicated with the second outlet, and the first cover plate assembly is provided with a steering groove for communicating the first heat exchange tube unit with the second heat exchange tube unit.

7. The heat exchanger of claim 4, wherein the separator plate projects outwardly proximate the stagnation chamber and across the baffle plate to form the partition.

8. The heat exchanger of claim 1, wherein the flow blocking plate comprises a first flow blocking plate and a second flow blocking plate which are separately arranged, the side plate assembly further comprises a second side plate and a third side plate which are distributed at two sides of the first side plate, the second side plate extends to the third side plate to form the first flow blocking plate, and the third side plate extends to the second side plate to form the second flow blocking plate; alternatively, the spoiler is integrally formed.

9. The heat exchanger of claim 1, wherein the side plate assembly further comprises a fourth side plate disposed opposite to the first side plate, wherein both sides of the first side plate and the fourth side plate are provided with guard plates, and the guard plates of the first side plate and the fourth side plate are spliced.

10. An automotive air conditioning system comprising a heat exchanger as claimed in any one of claims 1 to 9.