CN110429358B

CN110429358B - Heat exchange device

Info

Publication number: CN110429358B
Application number: CN201910648154.4A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2015-07-16
Filing date: 2015-07-16
Publication date: 2023-05-09
Anticipated expiration: 2035-07-16
Also published as: CN110459832B; CN106356582B; CN110429358A; CN110459831B; CN110459832A; CN106356582A; CN110459833B; CN110459833A; CN110459831A

Abstract

The heat exchange device comprises a heat exchanger and a valve body, wherein the valve body comprises an inlet runner, an outlet runner and a valve core assembly accommodating cavity, the heat exchanger comprises an end plate, and the valve body is welded and fixed with the end plate; the heat exchanger comprises a first flow passage and a second flow passage, an outlet flow passage is communicated with the first flow passage, an included angle beta is formed between the outlet flow passage and the central line of the valve core assembly accommodating cavity, and the included angle beta has a value range: beta is more than 90 degrees and less than or equal to 180 degrees. The invention directly integrates the heat exchanger and the valve assembly, so that the heat exchange device has simple structure and reliable performance.

Description

Heat exchange device

The present application is a divisional application with patent application number 201510422245.8, application date 2015, 7, 16 and name "heat exchange device".

Technical Field

The invention relates to a heat exchange device, which is applied to a thermal management system of an electric automobile battery and the like.

Background

Generally, in a battery thermal management system of an electric vehicle, heat is generated when a battery of the electric vehicle works, and in order to ensure normal work of the battery, the battery needs to be cooled, and cooling by using a cooling liquid is a more common mode. The common battery cooling device comprises a heat exchanger and an expansion valve, wherein liquid refrigerant enters the heat exchanger after passing through the throttling function of the expansion valve, the refrigerant exchanges heat with cooling liquid in the heat exchanger, the cooling liquid is cooled, the cooled cooling liquid flows to a battery pack to cool a battery, the temperature of the cooling liquid rises after flowing through the battery pack, and the cooling liquid needs to return to the heat exchanger to be cooled, so that the circulation is realized. Typically, the heat exchanger is a plate heat exchanger.

In the existing heat management system, the heat exchanger and the expansion valve are separate components and are connected through pipelines and the like. Connecting parts such as pipelines can lead to the weight of the whole assembly to be heavier, the phenomena such as connecting pipe fracture and the like are easy to occur, and the cost is higher.

Therefore, how to directly integrate the heat exchanger and the expansion valve together, so that the structure is compact, the installation is convenient, and the use cost is low is a technical problem to be solved urgently by those skilled in the art.

Disclosure of Invention

The invention aims to provide a heat exchange device with simple structure and reliable performance.

In order to achieve the above object, the present invention provides a heat exchange device,

the heat exchange device comprises a heat exchanger and a valve body, wherein the valve body comprises an inlet runner, an outlet runner and a valve element assembly accommodating cavity, the heat exchanger comprises an end plate, and the valve body is fixedly welded with the end plate; the heat exchanger comprises a first flow passage and a second flow passage, the outlet flow passage is communicated with the first flow passage, an included angle beta is formed between the outlet flow passage and the central line of the valve core assembly accommodating cavity, and the included angle beta has a value range: beta is more than 90 degrees and less than or equal to 180 degrees.

Above-mentioned technical scheme is with heat exchanger and valve body integrated integral structure, does not need adapting unit, simple structure, compactness and dependable performance, and the installation of being convenient for and use cost are lower.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of a heat exchange device according to the present invention.

Fig. 2 is an exploded schematic view of the heat exchange device shown in fig. 1.

Fig. 3 is a schematic perspective view of a mounting plate of the heat exchange device of fig. 1.

Fig. 4 is a schematic cross-sectional view of a valve body of the heat exchange device of fig. 1.

Fig. 5 is a schematic view in partial cross-section of the heat exchange device of fig. 1.

Fig. 6 is a schematic cross-sectional view of the heat exchange device of fig. 1.

Fig. 7 is a schematic cross-sectional view of another structure of a valve body of the heat exchanging apparatus of fig. 1.

Fig. 8 is a schematic view of the structure of the valve assembly of the heat exchange device of fig. 1 rotated about the first stepped portion.

Fig. 9 is a schematic perspective view of another embodiment of the heat exchange device of the present invention.

Fig. 10 is a schematic cross-sectional view of yet another embodiment of the heat exchange device of the present invention.

Fig. 11 is a schematic cross-sectional view of a valve body of the heat exchange device shown in fig. 10.

Detailed Description

The heat exchange device has the advantages of less required installation space, simple and compact structure, strong reliability, convenient installation, good vibration resistance, lower use cost and capability of effectively inhibiting the gas-liquid layering phenomenon.

The present invention will be described in detail with reference to the accompanying drawings and the detailed description.

Fig. 1 to 6 show a heat exchange device according to an embodiment of the present invention, as shown in fig. 1 and 2, the heat exchange device includes a heat exchanger 10, a valve assembly 2, and a mounting plate 3 for fixing the heat exchange device, and the mounting plate 3 is also used for fixedly connecting the heat exchanger 10 and the valve assembly 2. The valve assembly 2 is a throttling device, so that throttling and depressurization of the high-pressure refrigerant can be realized.

The heat exchanger 10 may be used as an evaporator, and the heat exchanger 10 includes a first flow passage for cooling fluid circulation and a second flow passage for cooling fluid circulation, wherein the first flow passage includes a cooling fluid inlet and a cooling fluid outlet, and the second flow passage includes a cooling fluid inlet and a cooling fluid outlet. The cooling fluid inlet may be connected to the second nipple 4, the cooling fluid outlet may be connected to the first nipple 1, the refrigerant outlet may be connected to the third nipple 5, and the refrigerant inlet communicates with the outlet flow passage 2131 of the valve assembly 2 through the connection hole 32 on the mounting plate. The inlet 211 of the valve assembly 2 may be connected to a fourth connection pipe (not shown) or may be connected to the system by other forms of connection.

The heat exchanger 10 further comprises a heat exchange core, and end plates 6 and bottom plates 7 positioned at both ends of the heat exchange core. The heat exchange core comprises a plurality of first flow plates and a plurality of second flow plates which are mutually arranged at intervals in a stacked mode, wherein each first flow plate and two adjacent second flow plates form a first flow channel and a second flow channel, and the first flow channels and the second flow channels are mutually arranged at intervals. Wherein the first flow channel is part of the first flow channel and the second flow channel is part of the second flow channel. In this embodiment, the first flow plate and the second flow plate are the same flow plate 8, and when stacked, the first flow plate is rotated 180 ° relative to the second flow plate to perform stacking. The flow-through plate 8 with the same shape and structure can save cost.

The refrigerant inlet and the refrigerant outlet, and the cooling liquid inlet and the cooling liquid outlet may be provided on the same side or on different sides of the heat exchanger 10, and may be any two of four ports. The first connecting pipe 1, the second connecting pipe 4 and the third connecting pipe 5 can be aluminum alloy pipes and are connected with the heat exchanger 10 in a brazing manner; some or all of the other three connection pipes may be fixedly connected to the mounting plate 3 by brazing and connected to the heat exchanger 10 by the mounting plate 3.

In the above embodiment, the heat exchanger 10 is a plate heat exchanger, but may be a plate-fin heat exchanger, and other types of heat exchangers are also applicable.

As shown in fig. 3, the mounting plate 3 may be formed by punching a metal plate material, or may be formed by machining, and the plate material may be made of an aluminum alloy material. The mounting plate 3 comprises a matching part and a plurality of mounting holes 35 positioned outside the matching part. The mounting holes 35 are completely exposed to the outside of the heat exchanger 10 in the mounting direction through the mounting holes 35, and the mounting holes 35 do not interfere with the heat exchange core. In this way, the heat exchanger 10 is not touched when the heat exchanger is mounted and fixed by screws (not shown) passing through the mounting holes 35. This design reduces the cost and difficulty of installation of the heat exchanger device on the one hand and reduces the probability of damage to the heat exchanger 10 during installation on the other hand.

It should be noted here that the shape and structure of the mounting plate 3, as well as the specific positions and number of mounting holes 35, may be set as desired for the specific mounting position of the heat exchanger device.

The fitting portion includes a first through hole 341 for fixedly mounting the first adapter tube 1, a second through hole 342 for fixedly mounting the second adapter tube 4, a third through hole 343 for fixedly mounting the third adapter tube 5, and a fourth through hole 32. Wherein the first through hole 341 and the second through hole 342 are in communication with the second flow passage of the heat exchanger 10, and the third through hole 343 and the fourth through hole 32 are in communication with the first flow passage of the heat exchanger 10. In the present embodiment, the first through hole 341 and the second through hole 342 are respectively communicated with the cooling liquid inlet and the cooling liquid outlet of the heat exchanger 10, and the third through hole 343 and the fourth through hole 32 are respectively communicated with the refrigerant outlet and the inlet of the heat exchanger 10.

The first through hole 341 and the cooling liquid inlet are both circular and coaxially or eccentrically arranged, and the inner diameter of the first through hole 341 is larger than the inner diameter of the cooling liquid inlet so as to form a step, so that the butt joint and the positioning with one end of the first connecting pipe 1 are facilitated, and the installation of the first connecting pipe 1 is facilitated. Likewise, the second through hole 342 and the coolant outlet are both circular and coaxially or eccentrically disposed, and the inner diameter of the second through hole 342 is larger than the inner diameter of the coolant outlet to form a step, thereby facilitating the butt joint and positioning with one end of the second adapter 4, and facilitating the installation of the second adapter 4. Likewise, the third through hole 343 and the refrigerant outlet are both circular and coaxially or eccentrically disposed, and the inner diameter of the third through hole 343 is larger than the inner diameter of the refrigerant outlet to form a step, thereby facilitating the butt joint and positioning with one end of the third connection pipe 5 and facilitating the installation of the third connection pipe 5.

The fourth through hole 32 and the refrigerant inlet are both circular and coaxially disposed, the inner diameter of the fourth through hole 32 may be smaller than or equal to the inner diameter of the refrigerant inlet, and the inner diameter of the fourth through hole 32 may be smaller than the inner diameter of the third through hole. The outlet flow passage 2131 of the valve assembly 2 communicates with the refrigerant inlet of the heat exchanger through a fourth orifice 32. To facilitate positioning and mounting of the valve assembly 2, at least two orientation bumps 31 are further provided on the side of the fourth through hole 32 of the mounting plate 3, and the mounting plate 3 is further provided with two positioning holes.

As shown in fig. 2 to 6, the valve assembly 2 includes a valve body 21, a coil assembly 22, and a spool assembly 23, the valve body 21 includes an inlet flow passage 211, an outlet flow passage 2131, and a spool assembly receiving chamber 212, the spool assembly receiving chamber 212 may receive at least part of the spool assembly, wherein one end of the spool assembly receiving chamber 212 is open, and the spool assembly receiving chamber 212 communicates with the inlet flow passage 211 and the outlet flow passage 2131. The inlet flow passage 211 and the outlet flow passage 2131 are both generally perpendicular to the centerline of the spool assembly receiving cavity 212 and in a direction toward the open end of the spool assembly receiving cavity 212, the inlet flow passage 211 is relatively close to the open end of the spool assembly receiving cavity 212 and the outlet flow passage 2131 is relatively far from the open end of the spool assembly receiving cavity 212. In this way, since the inlet flow passage 211 and the outlet flow passage 2131 are both substantially perpendicular to the center line of the valve core assembly accommodating chamber 212, the direction in which the refrigerant flows out from the orifice in the valve core assembly 23 and the direction in which the refrigerant flows into the heat exchanger 10 through the outlet flow passage 2131 are substantially at an angle of 90 °, the refrigerant ejected from the orifice is not directly injected into the heat exchanger, and thus, the problem that the refrigerant is unevenly distributed in the first flow channels between the flow plates due to the direct injection of the refrigerant into the heat exchanger can be effectively prevented, the refrigerant can be more uniformly distributed in the first flow channels, and the heat exchange performance of the heat exchanger can be effectively improved.

And the refrigerant flows out of the outlet runner 2131 and then directly flows into the heat exchanger through the fourth through hole 32, so that the phenomenon that the refrigerant is separated from gas and liquid in the flowing process due to the longer middle distance can be well restrained, the heat exchange performance of the heat exchanger is improved, and the superheat degree can be well controlled. Further, the valve body 21 is directly fixedly mounted to the mounting plate 3, so that the vibration resistance of the heat exchanger can be improved.

The side wall of the outlet flow passage 2131 of the valve body 21 on the side where the outlet is located is further provided with a second step portion 214 and a first step portion 213 protruding a predetermined distance from the side wall, and the first step portion 213 protrudes from the upper plane of the second step portion 214. The second step portion 214 is a cylindrical structure or a polygonal prism structure, and includes a circular end surface 2141, and the height of the second step portion is X, where the range of X is: x is more than or equal to 0.1mm and less than or equal to 1mm, and a certain distance is kept between the outer end part of the second step part 214 and the outer end part of one side wall of the valve body 21 where the second step part 214 is positioned.

As shown in fig. 7, the side wall of the valve body may be provided with an annular recess 217 to form the second step 214.

The first step 213 protrudes from the end surface 2141 by a certain distance, and in the heat exchange device, the first step 213 may extend into the fourth through hole 32, and the first step 213 performs positioning and limiting functions. The first step portion 213 may be a cylindrical structure or a polygonal column structure, and when the first step portion 213 is a polygonal column structure, the first step portion 213 may also play a role in limiting during installation, preventing the valve body 21 from being unable to install the valve core assembly 23 and the coil assembly 22 caused by rotation of the first step portion 213, and also preventing the uniformity and the aesthetic property affecting the appearance of the product, which is more beneficial to the design of the fixture.

In the present embodiment, the valve body 21 is fixed to the mounting plate 3 by welding. As shown in fig. 5, the end surface 2141 is in direct contact with the end surface of the mounting plate 3, the end surface 2141 is a welding surface, and the height of the second step portion 214 is X, so that a gap is formed between the side wall of the valve body where the second step portion 214 is located and the mounting plate 3, and the value range of X is 0.1mm or less and 1mm or less.

Of course, the valve body may be fixedly mounted on the mounting plate 3 by a screw, and in order to improve the sealing performance, a sealing ring (not shown) may be provided between the outer wall of the first step portion 213 and the inner wall of the fourth through hole 32, and in order to facilitate the mounting of the sealing ring, a groove (not shown) may be provided on the outer wall of the first step portion 213.

During assembly, the flow plate 8, the end plate 6, the bottom plate 7, the mounting plate, the first connecting pipe 1, the second connecting pipe 4, the third connecting pipe 5 and the valve body 21 are welded together in a brazing mode. Before welding, firstly, assembling the flow plate 8, the end plate 6, the bottom plate 7, the mounting plate, the first connecting pipe 1, the second connecting pipe 4, the third connecting pipe 5 and the valve body 21, and putting the assembled parts into a special fixture for compaction and fixation; then, the press-fitted flow-through plate 8, end plate 6, bottom plate 7, mounting plate, first connection pipe 1, second connection pipe 4, third connection pipe 5, and valve body 21 are placed in a furnace to be welded. The welding mode can adopt a vacuum furnace for vacuum brazing or a tunnel furnace for nitrogen shielded welding. After the welding, the valve body 21 is sequentially attached with the valve element assembly 23 and the coil assembly 22.

As shown in fig. 8, when the distance between the third through hole 343 and the fourth through hole 32 on the mounting plate 3 is shorter and the valve core assembly 23 or the coil assembly 22 cannot be mounted, the valve body 21 may be rotated by a certain angle relative to the first step portion 213, and the range of the included angle α between the center line of the valve core assembly 23 and the mounting plate 3 may be: alpha is more than or equal to 0 degree and less than or equal to 90 degrees, and the value of the included angle alpha can be adjusted according to specific installation requirements.

Fig. 9 shows another embodiment of the invention, in which the mounting plate 3 is provided with grooves for clamping the valve body 21, the valve body 21 being sealingly fixed to the end plate 6 by welding. In this embodiment, the mating portion includes the groove. Because the valve body 21 is clamped and fixed on the mounting plate 3, the vibration resistance of the heat exchange equipment can be effectively improved.

Fig. 10 and 11 show a further embodiment of the present invention, in which the side wall of the valve body on the side where the open end of the valve element assembly accommodating chamber 212 is located is a slope surface 215, the center line of the valve element assembly accommodating chamber 212 is perpendicular to the slope surface 215, the included angle β between the outlet flow passage 2131 and the center line of the valve element assembly accommodating chamber 212 is greater than 90 ° and less than or equal to 180 °, and further, the included angle β between the outlet flow passage 2131 and the center line of the valve element assembly accommodating chamber 212 is greater than 90 ° and less than or equal to 165 °, so that the thickness W of the heat exchange device can be effectively reduced, the installation of the heat exchange device in the system is facilitated, and the installation space of the heat exchange device is reduced.

The above embodiments are only for illustrating the present invention and not for limiting the technical solutions described in the present invention, and although the present specification has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the above embodiments without departing from the spirit and scope of the present invention and all modifications thereof shall be covered by the scope of the claims of the present invention.

Claims

1. The heat exchange device comprises a heat exchanger and a valve body, wherein the valve body comprises an inlet runner, an outlet runner and a valve element assembly accommodating cavity, the heat exchanger comprises an end plate, and the valve body is fixedly welded with the end plate; the heat exchanger comprises a first flow passage and a second flow passage, the outlet flow passage is communicated with the first flow passage, an included angle beta is formed between the outlet flow passage and the central line of the valve core assembly accommodating cavity, and the included angle beta has a value range: beta is more than 90 degrees and less than or equal to 180 degrees;

the heat exchange device comprises a mounting plate, the mounting plate is fixed with the heat exchanger and comprises a fourth through hole, a first step part protruding out of the side wall of the valve body at a certain distance is arranged on the side wall of one side where the outlet of the outlet flow passage is located, the first step part stretches into the fourth through hole, and the outlet flow passage is directly communicated with the first flow passage through the fourth through hole;

the side wall of the valve body, on the side where the outlet of the outlet flow channel is located, is further provided with a second step portion, the second step portion comprises a circular end face, and the first step portion protrudes out of the end face.

2. The heat exchange device of claim 1 wherein the heat exchanger is used as an evaporator, the first flow path including a refrigerant inlet and a refrigerant outlet, the second flow path including a coolant inlet and a coolant outlet; the heat exchange device comprises a valve core assembly and a coil assembly, wherein the valve core assembly or part of the valve core assembly is positioned in the valve core assembly accommodating cavity.

3. The heat exchange device of claim 1, wherein the mounting plate defines a slot, and the valve body is engaged with the slot.

4. A heat exchange device according to claim 3, further comprising a first adapter tube, a second adapter tube and a third adapter tube, the mounting plate comprising a first through hole for fixedly mounting the first adapter tube, a second through hole for fixedly mounting the second adapter tube, a third through hole for fixedly mounting the third adapter tube;

the second step part protrudes out of the side wall by a certain distance, the height of the second step part is X, and the value range of X is as follows: x is more than or equal to 0.1mm and less than or equal to 1mm, and a certain distance is kept between the outer end part of the second step part and the outer end part of one side wall of the valve body where the second step part is positioned; the valve body is fixed with the mounting plate through welding, and the circular end face is a welding face.

5. A heat exchange device according to claim 3, further comprising a first adapter tube, a second adapter tube and a third adapter tube, the mounting plate comprising a first through hole for fixedly mounting the first adapter tube, a second through hole for fixedly mounting the second adapter tube, a third through hole for fixedly mounting the third adapter tube;

the side wall of the side where the outlet of the outlet flow passage of the valve body is located is also provided with a pit, the second step part is formed around the pit, the height of the second step part is X, and the value range of X is as follows: x is more than or equal to 0.1mm and less than or equal to 1mm;

the valve body is fixed with the mounting plate through welding, and the circular end face is a welding face.

6. The heat exchange device according to claim 3, wherein the valve body is fixedly mounted with the mounting plate by a screw, a sealing ring is arranged between the outer wall of the first step portion and the inner wall of the fourth through hole, and a groove for mounting the sealing ring is formed in the outer wall of the first step portion; or a sealing ring is arranged between the surface of the mounting plate, which is matched with the valve body, and the mounting plate, and a groove for mounting the sealing ring is arranged on the mounting plate.

7. The heat exchange device according to any one of claims 3 to 6, wherein the included angle α formed between the center line of the valve core assembly and the mounting plate is in the range of: alpha is more than or equal to 0 degree and less than or equal to 90 degrees, and the outlet flow passage is perpendicular to the central line of the valve core component accommodating cavity.

8. The heat exchange device according to claim 4 or 5, wherein the first step portion and/or the second step portion is a cylindrical structure or a polygonal column structure;

the side wall of one side of the valve element assembly accommodating cavity of the valve body, where the opening end is located, is a slope surface, the central line of the valve element assembly accommodating cavity is perpendicular to the slope surface, and an included angle beta between the outlet flow channel and the central line of the valve element assembly accommodating cavity is larger than 90 degrees and smaller than or equal to 165 degrees.

9. The heat exchange device of claim 2, wherein the heat exchange device comprises a mounting plate fixed to the heat exchanger, the mounting plate comprising a first through hole, a second through hole, and a third through hole, the first and second through holes communicating with the second flow passage of the heat exchanger, the third through hole communicating with the first flow passage of the heat exchanger, the first through hole and the coolant inlet being both circular and coaxially or eccentrically disposed, the first through hole having an inner diameter greater than an inner diameter of the coolant inlet to form a step; the second through hole and the cooling liquid outlet are both circular and coaxially or eccentrically arranged, and the inner diameter of the second through hole is larger than that of the cooling liquid outlet so as to form a step; the third through hole and the refrigerant outlet are both circular and coaxially or eccentrically arranged, and the inner diameter of the third through hole is larger than the inner diameter of the refrigerant outlet so as to form a step; the fourth through hole and the refrigerant inlet are both circular and coaxially arranged, the inner diameter of the fourth through hole is smaller than the inner diameter of the refrigerant inlet, and the inner diameter of the fourth through hole is smaller than the inner diameter of the third through hole; at least two directional protruding points are also arranged on the edge of the fourth through hole.