CN115398164A - Heat exchanger and gas-liquid separator - Google Patents

Abstract

A heat exchanger (1) comprises a container (11) and heat exchange tubes (12), wherein the heat exchange tubes (12) comprise heat exchange main body parts (123) located in the container (11), at least one end parts of the heat exchange tubes (12) are in limit or fixed connection with the container (11), assembling parts (121) are arranged at the end parts, the container (11) is provided with an insertion opening (111), the end parts of the heat exchange tubes (12) are at least partially inserted into the insertion opening (111), the container (11) comprises locking parts (112), the locking parts (112) are located at the peripheral wall of the insertion opening (111) of the container (11), the heat exchanger (1) further comprises locking elements (13), the locking elements (13) and the heat exchange tubes (12) are respectively formed, the locking elements (13) are at least partially located at the locking parts (112) and the assembling parts (121), and the heat exchange tubes (12) and the container (11) are in limit or fixed connection through the locking elements (13).

Description

Heat exchanger and gas-liquid separator

The present application claims priority from the patent application filed by the chinese patent office on 29/05/2020, having application number 202010473025.9 and entitled "a heat exchanger and gas liquid separator", the entire contents of which are incorporated herein by reference.

Technical Field

The invention relates to a heat exchanger applied to a vehicle thermal management system and a gas-liquid separator with the heat exchanger.

Background

The heat exchanger includes a heat exchange tube through which a high pressure refrigerant flows inside, and a vessel around which a low pressure refrigerant circulates outside, the high pressure refrigerant releasing some of its heat to the low pressure refrigerant, and in order to maintain the low pressure refrigerant, the low pressure refrigerant is located between the vessel and the heat exchange tube, which needs to pass through the vessel and be connected to a refrigerant line of a circulation system. The heat exchange tube and the vessel cover must be assembled in a pressure-tight manner, which is complicated and difficult to seal when the pressure level difference between the respective vessel spaces is large.

Currently, the heat exchange tube and the container cover may be assembled by providing a connection member to the heat exchange tube, the connection member being capable of bearing a load in an axial direction and being sealed in connection with the container cover. From the viewpoint of the connecting member, the heat exchanging tube is made to be more difficult to process.

Disclosure of Invention

The invention aims to design a heat exchanger and a gas-liquid separator with the heat exchanger, which can improve the sealing performance of a heat exchange pipe and a container and simplify the processing difficulty of the heat exchange pipe.

The invention adopts the following technical scheme:

a heat exchanger comprises a container and a heat exchange tube, wherein the heat exchange tube comprises a heat exchange main body part, the heat exchange main body part of the heat exchange tube is positioned in the container, at least one end part of the heat exchange tube is limited or fixedly connected with the container, the end part is provided with an assembling part, the container is provided with an insertion opening, at least part of the end part of the heat exchange tube is inserted into the insertion opening, the container comprises a locking part, the locking part is positioned at the peripheral wall of the insertion opening, the heat exchanger further comprises a locking element, the locking element and the heat exchange tube are respectively shaped, at least part of the locking element is positioned at the locking part and the assembling part, and the heat exchange tube is limited or fixedly connected with the container.

The application also discloses vapour and liquid separator, including above-mentioned heat exchanger, the container includes head and casing, the casing with the sealed fixed connection of head.

In the technical scheme, the heat exchanger comprises the locking element, the end part of the heat exchanger comprises the assembling part, the locking element and the heat exchange tube are separately machined and formed, the machining difficulty of the locking element and the heat exchange tube is small, the container comprises the locking part and the insertion opening, the locking part is positioned on the peripheral wall of the insertion opening, the locking element is at least partially positioned on the locking part and the assembling part, and the heat exchange tube is limited or fixedly connected with the container, so that the assembly is convenient. The whole heat exchanger has simple structure and low production cost. The gas-liquid separator of the heat exchanger in the scheme has good sealing performance and low production cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of a heat exchanger according to the present application;

FIG. 2 is a partially enlarged view of the portion A shown in FIG. 1;

FIG. 3 is a schematic view of the structure of the junction of the heat exchange tubes of the vessel of FIG. 2;

FIG. 4 is a schematic view of a partial cross-sectional structure of the heat exchange tube of FIG. 1;

FIG. 5 is a perspective view of the heat exchange tube of FIG. 1;

FIG. 6 is a schematic top view of one embodiment of the locking element of FIG. 2;

FIG. 7 is a schematic cross-sectional view taken along line C-C of the locking element of FIG. 6;

FIG. 8 is a perspective view of one embodiment of the locking element of FIG. 2;

FIG. 9 is a schematic cross-sectional view of a gas-liquid separator with a heat exchanger according to the present application;

FIG. 10 is a schematic diagram of the operation of the gas-liquid separator of FIG. 9.

Detailed Description

The embodiments are described below with reference to the drawings.

The heat management system of the vehicle comprises a gas-liquid separator, wherein the gas-liquid separator is used for separating a liquid component and a gaseous component of a working medium in the heat management system, the working medium is mainly a refrigerant, and the refrigerant comprises a carbon dioxide refrigerant. In the present application, the gas-liquid separator includes a heat exchanger including a heat exchange tube and a container, and the high-pressure refrigerant inside the heat exchange tube can exchange heat with the low-pressure refrigerant between the outside of the heat exchange tube and the inside of the container. Of course, the heat exchanger in the application can also be used in the situations with other heat exchange requirements or used independently.

In this embodiment, referring to fig. 1 to 9, a heat exchanger 1 includes a container 11 and a heat exchange tube 12, a heat exchange main body portion 123 of the heat exchange tube is located in the container 11, at least one end portion of the heat exchange tube 12 is connected to the container 11 in a limiting manner, in this embodiment, the heat exchange tube is connected to the container in a locking manner, at least one end portion of the heat exchange tube 12 includes a fitting portion 121, in this embodiment, both end portions of the heat exchange tube are provided with fitting portions, the container 11 has an insertion opening 111, the container 11 includes a locking portion 112, the locking portion 112 is communicated with the insertion opening 111, the heat exchanger 1 further includes a locking element 13, the locking element 13 and the heat exchange tube 12 are respectively formed, the locking element 13 is located between the locking portion 112 and the fitting portion 121, in this embodiment, the heat exchange tube 12 and the container 11 limit the relative position of the heat exchange tube and the container through the locking element 13, of course, here, elements other than the locking element may be added to perform limiting or fixing, the locking element may also be used in a direct fixing manner, the locking element may be welded to the heat exchange tube and the container, and the limiting and fixing manner are not limited.

The locking element 13 and the heat exchange tube 12 can be independently processed, the processing difficulty is small, the locking element 13 is limited between the locking part 112 and the assembling part 121, after the heat exchange tube 12 is inserted into the insertion opening 111, the heat exchange tube 12 and the container 11 are limited and locked through the locking element 13, and the assembling is safe, reliable and convenient. The heat exchanger has simple structure and low production cost.

With reference to fig. 2 and 4, in the present embodiment, the fitting part 121 further includes a high-pressure seal part 122, the high-pressure seal part 122 is farther from the heat exchange main body part 123 of the heat exchange tube 12 than the locking member 13 in the axial direction of the fitting part 121, and the high-pressure seal part 122 is sealingly connected to the vessel 11. The high-pressure seal portion 122 and the container 11 may be directly sealed by welding or indirectly sealed by a seal ring, and the fixing method is not limited.

Referring to fig. 2, 4 and 5, in the present embodiment, the high pressure sealing portion 122 is provided with a first groove 1221, the heat exchanger further includes a sealing ring 14, the sealing ring 14 is disposed in the first groove 1221, the high pressure sealing portion 122 is connected to the container 11 by the sealing ring 14 in a sealing manner, the fitting portion 121 is provided with a second groove 1222, the first groove 1211 is farther away from the heat exchange main body portion 123 of the heat exchange tube 12 than the second groove 1222, the locking member 13 is disposed in the second groove 1222, and the fitting portion 121 is engaged with the locking member 13, where the first groove and the second groove may be circular arc grooves, square grooves, etc., and the groove form is not limited.

Referring to fig. 6 and 7, in the present embodiment, the locking element 13 includes an inner locking portion 131 and an outer locking portion 132, the inner locking portion includes a first mounting portion 1311, a first connecting portion 1312, and a first locking portion 1313, the outer locking portion 132 includes a second mounting portion 1321, a second connecting portion 1322, and a second locking portion 1323, the first connecting portion 1312 and the second connecting portion 1322 are connected, the inner locking portion and the outer locking portion are integrally connected to the second connecting portion 1322 through the first connecting portion 1312, the first locking portion 1313 abuts against a groove wall of the second groove 1222 of the mounting portion, and the second locking portion 1322 abuts against the locking portion 112. The top surface of the first mounting portion 1311 abuts against the container, the bottom surface of the first mounting portion is at least partially fixedly connected with the top surface of the second connecting portion, the outer side surface of the second connecting portion is at least partially fixedly connected with the first buckling portion 1313, so that a first resilience space 134 is formed among the first buckling portion 1313, the first connecting portion 1312 and the second connecting portion 1322, the bottom surface of the second buckling portion abuts against the container, and the inner side surface of the second connecting portion is at least partially fixedly connected with the second buckling portion, so that a second resilience space 135 is formed among the second buckling portion, the first connecting portion and the second connecting portion. The buckle piece is detachably connected with the container, so that the processing cost is low and the manufacture is convenient.

Referring to fig. 8, in this embodiment, the number of the inner fastening portions 131 is at least one, the number of the outer fastening portions 132 is at least one, one of the first fastening portions 1313 and the second fastening portions 1323 is located on the inner wall of the locking element 13, the other one is located on the outer wall of the locking element 13, the inner fastening portions 131 and the outer fastening portions 132 are arranged inside and outside, and may be arranged in a one-to-one correspondence manner or in a staggered manner, where the inner fastening portions 131 and the outer fastening portions 132 are integrally connected in an annular manner, and the connection manner of the inner fastening portions and the outer fastening portions may be in other forms without limitation.

In this embodiment, the container 11 includes the locking portion 112, the container 11 has an insertion port 111, the end of the heat exchange tube 12 is at least partially inserted into the insertion port 111, the locking portion 112 is located at the peripheral wall of the insertion port 111, the locking portion 112 is used for installing the locking element 13, the insertion port 111 is designed to be easy to assemble, the insertion port may be a cylindrical insertion port or a square insertion port, and the insertion port is not limited.

Referring to fig. 3, in the present embodiment, the locking portion 112 is a placement groove, the placement groove includes a first locking element placement groove 1121 and a second locking element placement groove 1122, a step 1123 is provided at a connection portion of the first locking element placement groove 1121 and the second locking element placement groove 1122, the first latching portion 1323 is placed in the first locking element placement groove 1121, the first latching portion 1323 abuts against a groove wall of the second groove 1222 of the fitting portion 121, the second latching portion 1323 is placed in the second locking element placement groove 1122, the second latching portion 1323 is positioned to abut against the step 1123, and a side wall of the first connecting portion 1312 abuts against an inner wall of the first locking element placement groove 1121.

Referring to fig. 9, in this embodiment, the gas-liquid separator 2 has the heat exchanger 1 described above, the container includes a head 21 and a housing 22, the head 21 and the housing 22 are fixedly connected in a sealing manner, the head 21 includes a first head 211 and a second head 212, the first head 211 has a high-temperature high-pressure liquid inlet 2112, the second head 212 has a high-temperature high-pressure liquid outlet 2122, the first head 211 is in limit clamping with the end of the heat exchange tube 12 through a locking element 13', the second head 212 is in limit clamping with the end of the heat exchange tube through a locking element 13 ″, the high-temperature high-pressure liquid inlet 2112 is communicated with one end of the heat exchange tube 12, the high-temperature high-pressure liquid outlet 2122 is communicated with the other end of the heat exchange tube 12, the housing 22 includes an outer housing 221 and an inner housing 222, the first head 211 and the outer housing 221 are fixedly connected in a sealing manner, the second head 212 and the outer housing 221 are fixedly connected in a sealing manner, a housing cavity 23 is formed between the housing 22 and the head 21, the housing 23 includes a first cavity 231 and a second cavity 232, the first cavity 231 and the outer housing 221 at least include a portion between the inner housing 222, and the second cavity 232 communicate with the second cavity 232.

In this embodiment, the gas-liquid separator 2 further includes a gas-liquid separation device 24, the gas-liquid separation device 24 is located in the first cavity 231, the gas-liquid separation device includes a spiral device 241, a flow director 242, a suction pipe assembly 243 and a fixing member 244, the first end socket 211 and the inner shell 222 are fixedly connected through the fixing member 244, the inner shell 222, the first end socket 211 and the fixing member 244 form the first cavity 231, the first end socket 211 is provided with an inlet 2111 of a working medium, the working medium is a gas-liquid mixture, the inlet 2111 is communicated with the spiral device 241, the spiral device 241 is limited with the first end socket 211, an outlet direction of the spiral device 241 is along a tangential direction of a side wall of the inner shell 241, the spiral device 241 is at least partially located in the fixing member 244, the flow director 242 is located below the spiral device 241, and the suction pipe assembly 243 is used for outputting gaseous working medium components out of the inner shell in a pipe conveying manner. One end of the suction pipe component 243 is limited in the first end socket 211, the other end is freely arranged in the first cavity 231, at least part of the spiral device 241 is tightly matched and limited with the suction pipe component 243, and the arrangement structure not only firmly and tightly fixes the spiral device, but also enables the gas-liquid mixture to be tangentially transmitted out of the outlet of the spiral device to the inner shell.

In this embodiment, the flow guiding device 242 includes a flow guiding portion, the flow guiding portion is a circular flow guiding plate, the flow guiding plate is disposed outward along an inner wall of an inlet end of the flow guiding device 242, and the flow guiding portion can guide the working medium to an inner wall of the inner shell 222, which facilitates separation of gas, liquid and liquid working medium. The suction pipe assembly 243 includes an outer suction pipe 2431, an inner suction pipe 2432 and an oil return device 2433, the outer suction pipe 2431 and the deflector 242 are of an integral structure, the oil return device 2433 is disposed at one end of the outer suction pipe 2431 close to the second end enclosure 212, the inner suction pipe 2432 is disposed in the outer suction pipe 2431, the inner suction pipe 2432 is communicated with the first end enclosure 211, the outer suction pipe 2431 is used for outputting the gaseous refrigerant component from the screw 241 and the deflector 242 in a pipe conveying manner to an oil return device for enriching the gaseous refrigerant with oil, and the inner suction pipe 2432 is used for enabling the gaseous refrigerant component to pass through the first end enclosure 211 from the oil return device to leave the first cavity 231 and enter the second cavity 232 in a pipe conveying manner.

In this embodiment, the gas-liquid separator further includes a drying pack 25, the outer suction pipe 2431 has a limiting portion 251, the limiting portion 251 is a protrusion with a set distance, the drying pack 25 is limited by the limiting portion and the outer suction pipe 2431, and the drying pack can absorb moisture in the working medium.

In this embodiment, a circulation channel communicating the first chamber 231 and the second chamber 232 is disposed in the first end socket 211, the heat exchange main body 123 of the heat exchange tube is disposed in the second chamber 232, at least part of the heat exchange main body 123 of the heat exchange tube includes a spiral tube 1231, a straight tube 1232, and fins 1233, the spiral tube and the straight tube are integrated into a whole, the spiral tube is communicated with the straight tube, the spiral tube may be a circular tube or a flat tube, the form of the tube is not limited, the inner wall of the spiral tube 1231 is closely attached to the outer wall of the inner shell 222 through the fins 1233, the spiral tube may not be provided with the fins 1233, a spiral channel 1234 is formed between the spiral tube 1231 and the inner shell 222 and the outer shell 221, the heat exchange tube contains a high-temperature high-pressure working medium, a low-temperature low-pressure separated gaseous working medium flows between the inner shell 222 and the outer shell 221, the low-temperature low-pressure gaseous working medium exchanges heat with the high-temperature high-pressure working medium between the spiral channel, the spiral channel is favorable for improving the heat exchange efficiency of the working medium, the straight tube is disposed at one end of the inner shell, the straight tube is relatively reduces the heated evaporation of the liquid-phase refrigerant in the liquid storage section, and is favorable for maintaining the liquid volume of the straight tube.

In this embodiment, the gas-liquid separator further comprises a filter 26 and an air outlet 2121, the filter 26 is covered on the air outlet 2121 and fixed between the bottom of the liquid storage end of the inner housing 222 and the second end enclosure 212, the heat exchanger has a straight tube 1232 with the end penetrating through the filter 26, and the heat exchanger has a straight tube with the end at least partially penetrating through the filter and clamped with the high-temperature and high-pressure liquid outlet 2122 of the second end enclosure by the locking element 13 ". The filter 26 is able to filter the gas after heat exchange, making it possible to introduce a cleaner gas into the compressor, reducing problems due to impurities.

Referring to fig. 10, in operation of the gas-liquid separator, a gas-liquid two-phase low-temperature low-pressure working medium can enter the screw 241 through the inlet 2111, after being mixed by the screw 241, the gas-liquid two-phase low-temperature low-pressure working medium leaves the screw 241 through the outlet of the screw, the gas-liquid mixed working medium moves along the inner wall of the inner housing 22 in the first chamber 231, the gas-phase working medium rises, the liquid-phase working medium sinks, the liquid-phase working medium is stored in the first chamber 231 (low-pressure liquid storage chamber), the gas-phase working medium rises and enters the outer suction pipe 2431 from the inlet of the outer suction pipe, the outer suction pipe brings the gas-phase working medium to the oil return device 2433, the oil return device 2433 brings the gas-phase working medium with oil, the gas-phase working medium with oil into the inner suction pipe 2432, the gas-phase working medium flows into the second chamber 232 through the communication passage in the first head 211, the gas-phase working medium leaves the space formed between the first head 221 and the outer housing 221, the gas-phase working medium slowly flows into the inner housing passage 1234 between the inner housing 222 and the outer housing 221, the inner housing 211, the gas-phase working medium passes through the spiral heat exchange pipe 26, the high-temperature low-pressure low-temperature working medium flow-pressure working medium filter after passing through the spiral working medium heat exchange pipe 26, and the high-temperature low-pressure working medium heat exchange filter 26, and the gas-phase working medium heat exchange pipe 26.

It should be noted that: although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that all modifications and equivalents that do not depart from the spirit and scope of the present invention should be covered by the present invention.

Claims (13)

1. A heat exchanger comprises a container and a heat exchange tube, wherein the heat exchange tube comprises a heat exchange main body part, the heat exchange main body part of the heat exchange tube is positioned in the container, at least one end part of the heat exchange tube is in limit or fixed connection with the container, the end part is provided with an assembling part, the container is provided with an insertion opening, at least part of the end part of the heat exchange tube is inserted into the insertion opening, the container comprises a locking part, the locking part is positioned on the peripheral wall of the insertion opening, the heat exchanger further comprises a locking element, the locking element and the heat exchange tube are respectively shaped, the locking element is at least partially positioned on the locking part and the assembling part, and the heat exchange tube is in limit or fixed connection with the container.
2. The heat exchanger as claimed in claim 1, wherein the fitting portion includes a high-pressure seal portion which is farther from the heat exchange main body portion of the heat exchange tube than the locking member in an axial direction of the fitting portion, the high-pressure seal portion being sealingly connected to the vessel.
3. The heat exchanger of claim 2, wherein the high pressure seal portion has a first groove, the heat exchanger further comprises a seal ring at least partially disposed in the first groove, the high pressure seal portion is sealingly connected to the vessel by the seal ring, the fitting portion has a second groove, the first groove is further from the heat exchange main body portion of the heat exchange tube than the second groove, the locking member is at least partially disposed in the second groove, and the fitting portion is snap-fitted to the locking member.
4. A heat exchanger according to any one of claims 1 to 3, wherein the locking element comprises an inner engaging portion and an outer engaging portion, the inner engaging portion comprising a first connecting portion and a first latching portion, the outer engaging portion comprising a second connecting portion and a second latching portion, the first connecting portion being connected to the second connecting portion, the first latching portion being in abutment with a groove wall of the second recess of the assembling portion, the second latching portion being in abutment with the locking portion.
5. The heat exchanger according to claim 4, wherein the inner clamping portion includes a first mounting portion, the outer clamping portion includes a second mounting portion, a top surface of the first mounting portion abuts against the container, a bottom surface of the first mounting portion is at least partially fixedly connected with a top surface of the second connecting portion, an outer side surface of the second connecting portion is at least partially fixedly connected with the first clamping portion, so that a first rebound space is formed among the first clamping portion, the first connecting portion and the second connecting portion, a bottom surface of the second clamping portion abuts against the container, and an inner side surface of the second connecting portion is at least partially fixedly connected with the second clamping portion, so that a second rebound space is formed among the second clamping portion, the first connecting portion and the second connecting portion. 6. The heat exchanger of claim 5, wherein the number of the first locking portion is at least one, the number of the second locking portion is at least one, one of the first locking portion and the second locking portion is located on the inner wall of the locking element, the other of the first locking portion and the second locking portion is located on the outer wall of the locking element, and the inner locking portion and the outer locking portion are of an integral structure.
6. The heat exchanger as claimed in claim 6, wherein the locking portion has a placement groove formed recessed from an inner wall of the insertion port, and the locking member is at least partially positioned in the placement groove.
7. The heat exchanger according to claim 7, wherein the placement grooves include a first locking element placement groove and a second locking element placement groove, a step is provided at a junction of the first locking element placement groove and the second locking element placement groove, and the first catching portion is placed in the first locking element placement groove; the second buckling part is placed in the second locking element placing groove, the second buckling part is abutted to the step, and the side wall of the first connecting part is abutted to the inner wall of the first locking element placing groove.
8. A gas-liquid separator comprising the heat exchanger of any one of claims 1 to 8, the vessel comprising a head and a housing, the housing and the head being sealingly and fixedly connected.
9. The gas-liquid separator of claim 9, wherein the head comprises a first head and a second head, the first head has a high-temperature high-pressure liquid inlet, the second head has a high-temperature high-pressure liquid outlet, the first head is clamped with the heat exchange tube through the locking element, the second head is clamped with the heat exchange tube through the locking element, the housing comprises an outer housing and an inner housing, the first head is fixedly connected with the outer housing in a sealing manner, the second head is fixedly connected with the outer housing in a sealing manner, a containing cavity is formed between the housing and the head, the containing cavity comprises a first cavity and a second cavity, the first cavity at least comprises a part between the inner housing and the outer housing, the second cavity at least comprises a part between the head and the inner housing, and the first cavity is communicated with the second cavity.
10. The gas-liquid separator of claim 10, further comprising a gas-liquid separation device positioned within the first cavity, the first head and the inner housing fixedly connected by the fastener, the inner housing, the first head, and the fastener forming a first cavity, the first head having a gas-liquid mixture inlet.
11. The gas-liquid separator of claim 11, wherein the gas-liquid separation device comprises a screw, a deflector, a fixed member, and a suction tube assembly, wherein the gas-liquid mixture inlet is in communication with the screw, the screw is fixed to the first head, the outlet of the screw is oriented perpendicular to the axis of the gas-liquid separator, the screw is at least partially disposed within the fixed member, the deflector is disposed below the screw, and the suction tube assembly is configured to output the gaseous refrigerant component from the gas-liquid separator in a tube transport manner.
12. The gas-liquid separator according to claim 12, wherein the first head further includes a flow passage communicating the first chamber with the second chamber, the heat exchanging main body of the heat exchanging pipe is located in the second chamber, the heat exchanging main body of the heat exchanging pipe includes at least a spiral pipe, a fin, and a straight pipe, the spiral pipe communicates with the straight pipe, the spiral pipe and the straight pipe are integrally formed, an inner wall of the spiral pipe is closely attached to an outer wall of the inner housing through the fin, a spiral passage is formed between the spiral pipe and the outer wall of the inner housing and the inner wall of the outer housing, and the straight pipe is located at an end of the inner housing where the liquid is stored.
13. The gas-liquid separator of claim 13, further comprising a filter and an air outlet, wherein the filter is covered on the air outlet, the filter is fixed between the bottom of the shell at one end of the inner shell for storing the liquid and the second end socket, and the heat exchange tube has a straight tube with a distal end at least partially passing through the filter and being clamped with the high-temperature and high-pressure liquid outlet of the second end socket.

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