CN114688902A - Heat exchange device and manufacturing method thereof - Google Patents

Abstract

The invention discloses a heat exchange device and a manufacturing method thereof, the heat exchange device comprises a heat exchanger and an expansion valve, the expansion valve comprises an outer valve body and an inner valve body, the heat exchanger is fixedly connected with the outer valve body, the outer valve body is detachably connected with the inner valve body, a first heat exchange channel and a second heat exchange channel which are not directly communicated are formed in the heat exchanger, the outer valve body comprises a first interface part and a second interface part, the first interface part and the second interface part are respectively provided with a first interface and a second interface, and the expansion valve is provided with a first inner interface which corresponds to the first interface in position and is matched and communicated with the first interface; the outer valve body is provided with an accommodating cavity, at least part of the inner valve body is positioned in the accommodating cavity, the first interface is communicated with the first heat exchange channel, the second interface is communicated with the first heat exchange channel, the expansion valve also comprises a throttling part, the throttling part is provided with a valve port, and fluid flows into the throttling part from the first inner interface and flows into the heat exchanger after being throttled; the inner valve body can realize standardization, and the outer valve body can be adjusted according to system requirements to realize matching, so that production management is facilitated.

Description

Heat exchange device and manufacturing method thereof

Technical Field

The invention relates to the technical field of heat exchange, in particular to a heat exchange device and a manufacturing method thereof.

Background

At present, a common expansion valve is combined with a plate heat exchanger, the expansion valve is provided with four interfaces, two interfaces are connected with the plate heat exchanger, and the other two interfaces are connected with a compressor and a liquid storage device. The four interfaces and the central control part of the expansion valve are processed and molded on the same valve body. This structure has several disadvantages:

1. once the interface of the newly designed expansion valve is replaced, the whole expansion valve must be replaced;

2. when an expansion valve manufacturer assembles, corresponding equipment needs to be customized according to different valve body shapes and interface sizes, so that the integrated manufacturing cost of the expansion valve and the plate heat exchanger is high.

Disclosure of Invention

The object of the present invention is to provide a heat exchanger and a method for manufacturing the same, which can be standardized and manufactured at low cost.

The invention provides a heat exchange device, which comprises a heat exchanger and an expansion valve, wherein the expansion valve comprises an outer valve body and an inner valve body, the heat exchanger is fixedly connected with the outer valve body, the inner valve body is detachably connected with the outer valve body, a first heat exchange channel and a second heat exchange channel which are not directly communicated are formed in the heat exchanger, the outer valve body comprises a first interface part and a second interface part, the first interface part is provided with a first interface and a first outer interface, the first outer interface is a first inlet of the heat exchange device, the second interface part is fixedly connected with the heat exchanger, the inner valve body is provided with a first inner interface and a second inner interface, the first inner interface corresponds to the first interface in position and is communicated in a matched manner, and the second inner interface corresponds to the second interface in position and is communicated in a matched manner; the outer valve body is provided with an accommodating cavity, at least part of the inner valve body is positioned in the accommodating cavity, the second outer interface is communicated with the first heat exchange channel, the inner valve body further comprises a throttling part, the throttling part is provided with a valve port, a first flow channel is arranged between the first inner interface and the second inner interface, the first outer interface is communicated with the first flow channel, the valve port is positioned in the first flow channel, and the flow area of the valve port is smaller than that of other parts of the first flow channel.

In order to achieve the above object, the present invention further provides a method for manufacturing a heat exchanger, the method comprising the steps of:

providing a heat exchanger and an outer valve body, wherein the outer valve body comprises a first interface part and a second interface part, the heat exchanger comprises a heat exchange core body, the heat exchange core body is provided with an angle hole, the outer valve body is fixedly connected with the heat exchange core body, the heat exchanger is provided with a first heat exchange channel and a second heat exchange channel, the first interface part is a first inlet, and the second interface part is communicated with the first heat exchange channel or the second heat exchange channel of the heat exchanger;

providing an inner valve body and a sealing ring, wherein the inner valve body or the outer valve body is provided with a sealing groove, and the sealing ring is pressed into the sealing groove;

pressing the inner valve body into the outer valve body through external pressure, and ensuring that an inner interface of the inner valve body is butted with an interface of the outer valve body as much as possible, so that the first interface part is communicated with the first inner interface, and the second interface part is communicated with the second inner interface;

the outer valve body and the inner valve body comprise a positioning structure and a limiting structure, so that the inner valve body and the outer valve body can be detachably connected to form the heat exchange device.

In the heat exchange device and the manufacturing method thereof, the heat exchange device comprises a heat exchanger and an expansion valve, the expansion valve comprises an outer valve body and an inner valve body, the outer valve body is fixedly connected with the heat exchanger, the inner valve body is detachably connected with the outer valve body, the outer valve body can be adjusted along with the shape and the size of a heat exchanger interface, the inner valve body can be standardized, the need of replacing the whole expansion valve due to the replacement of the expansion valve interface, the appearance and the interface size is reduced, the inner valve body of the expansion valve can be independently processed and molded, the inner valve body is combined with different outer valve bodies to realize different interfaces, the heat exchanger is connected with the outer valve body, and the production management is facilitated.

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 perspective view of a heat exchange apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic exploded perspective view of the heat exchange device of FIG. 1;

FIG. 3 is a schematic elevation view of the first and second plates of the heat exchange core of FIG. 2;

FIG. 4 is a schematic cross-sectional view of the outer valve body in one direction;

FIG. 5 is a schematic top view of the heat exchange device in FIG. 1;

FIG. 6 is an exploded perspective view of another perspective of the heat exchange device of FIG. 1;

FIG. 7 is a schematic perspective view of another embodiment of a heat exchange device according to the present invention;

FIG. 8 is a schematic cross-sectional view of the heat exchange device in FIG. 5 along the direction B-B;

FIG. 9 is a schematic front view of the inner valve body of the expansion valve of FIG. 8;

fig. 10 is a schematic sectional view of the expansion valve of fig. 9 in a direction a-a;

FIG. 11 is a cross-sectional view of the assembled inner and outer valve bodies;

FIG. 12 is a perspective view of a perspective of the outer valve body;

FIG. 13 is a perspective view of a valve body with a positioning notch;

FIG. 14 is a perspective view of a heat exchange device with a snap ring according to the present invention;

FIG. 15 is a top view of the snap ring of FIG. 14;

FIG. 16 is a perspective view of a latching inner valve body;

FIG. 17 is a perspective view of another embodiment of an outer valve body.

Detailed Description

Embodiments are described below with reference to the drawings, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In order to solve the technical problem to be solved, the heat exchange device comprises a heat exchanger and an expansion valve, the expansion valve comprises an outer valve body and an inner valve body, the outer valve body is fixedly connected with the heat exchanger, the inner valve body is connected with the outer valve body, the outer valve body can be adjusted along with the shape and the size of a connector of the heat exchanger, the inner valve body can be standardized, the requirement for replacing the whole expansion valve due to replacement of the connector, the shape and the size of the connector of the expansion valve is reduced, the inner valve body of the expansion valve can be independently processed and formed, the inner valve body is combined with different outer valve bodies, different connectors are realized, the heat exchanger is connected with the outer valve body, and production management is facilitated.

Referring to fig. 1, 2 and 3, a heat exchange device 700 according to an embodiment of the present invention includes a heat exchanger 70 and an expansion valve 10, the heat exchanger 70 includes a heat exchange core 71, the heat exchange core 71 includes at least two stacked plates 74, the plates 74 include first plates 741 and second plates 742, the first plates 141 have first corner holes 751, the first plates are substantially rectangular in shape, the number of the first corner holes 751 is four, and the first corner holes 751 are respectively disposed at corners of the first plates 741. The second plate 742 has the same or similar structure as the first plate 741, and has second corner holes 752, and the number of the second corner holes 752 is also four, and the second corner holes are respectively located at the corners of the second plate. The first corner holes 751 and the second corner holes 752 are correspondingly arranged, a heat exchange area of the heat exchange core 11 is formed between the first plate 741 and the second plate 742, the first plate 741 and the second plate 742 are sequentially stacked, so that the heat exchange core 71 forms a first heat exchange channel 743 and a second heat exchange channel 744 which are not directly communicated, and the non-direct communication here means that the heat exchange core is not communicated inside and can be indirectly communicated or communicated through a system after entering the system.

Referring to fig. 11, the expansion valve 10 includes an inner valve body 200 and an outer valve body 100, and the inner valve body 200 includes a valve body 11, a power head assembly 12, a drive rod member 13, a valve core assembly 14, and a regulating assembly 15.

The top of the valve body 11 is provided with an opening, the power head assembly 12 is fixed with the valve body 11 through welding, and the power head assembly 12 is positioned at the position of the valve body 11 opposite to the top; the adjusting assembly 15 is in threaded connection with the valve body 11, the adjusting assembly 15 is located at a position, relatively close to the bottom, of the valve body 11, the inner valve body 200 is provided with a valve chamber 16, the valve core assembly 14 is located in the valve chamber 16, and the valve core assembly 14 can change the flow area of a valve port of the expansion valve through the power head assembly 12 and the transmission rod component 13, so that the flow of fluid passing through the expansion valve can be adjusted; the transmission rod part 13 is positioned inside the inner valve body 200, the transmission rod part 13 is in transmission connection with the power head assembly 12 and the valve core assembly 14, the transmission rod part 13 can be abutted against the power head assembly 12 and comprises direct abutment and indirect abutment, the transmission rod part 13 can be abutted against the valve core assembly 14 and comprises direct abutment and indirect abutment, the transmission rod part 13 can move along with the power head assembly 12 when the power head assembly 12 is heated or cooled, so that the abutment drives the valve core assembly 14 to move up and down, the valve core assembly 14 can move up and down for a certain distance under the action of the power head assembly 12, and the flow area of a valve port of the expansion valve can be adjusted.

Referring to fig. 10, the valve body 11 has a substantially vertically extending structure, and the valve body 11 has a first inner port 111, a second inner port 112, a third inner port 113, and a fourth inner port 114. The valve body 11 includes a first flow passage 115 and a throttle portion 116, the first inner port 111 is one interface of the first flow passage 115, and the second inner port 112 is the other interface of the first flow passage 115. The valve body 11 includes a second flow passage 117, the third inner interface 113 is one interface of the second flow passage 117, and the fourth inner interface 114 is the other interface of the second flow passage 117. In one specific application, fluid flows in through the first inner port 111, is throttled by the valve port of the throttle, flows out of the outer valve body from the second inner port 112, flows in from the outer valve body through the third inner port 113, and flows out of the outer valve body into the system from the fourth inner port 114. Of course, the second and fourth inner ports 112 and 114 may serve as inlets, and the first and third inner ports 111 and 113 may serve as outlets. Of course, the valve body of the expansion valve may have only the first and second inner ports 111 and 112, and the fluid may flow into the inner valve body from the first inner port 111 and flow out of the inner valve body from the second inner port 112.

Referring to fig. 10, in the expansion valve of the present embodiment, the first inner port 111 and the fourth inner port 114 are located on the same side of the valve body 11, the second inner port 112 and the third inner port 113 are located on the same side of the valve body 11, the first inner port 111 is lower than the second inner port 112 in the axial direction of the transmission rod member, and the third inner port 113 and the fourth inner port 114 are located at substantially the same height. The valve body 11 includes a first seal groove 118, a second seal groove 119, and a third seal groove 120, the expansion valve includes a first seal ring 131, a second seal ring 132, and a third seal ring 133, the first seal ring 131 is located on the peripheral side of the valve body above the third inner port 113 and the fourth inner port 114, the second seal ring 132 is located on the peripheral side of the valve body below the third inner port 113 and the fourth inner port 114 and above the second inner port 112, the third seal ring 133 is located on the peripheral side of the valve body above the first inner port 111, the third seal ring 133 is located on the peripheral side of the valve body below the second inner port 112, the first seal ring 131 is located at least partially in the first seal groove 118, the second seal ring 132 is located at least partially in the second seal groove 119, and the third seal ring 133 is located at least partially in the third seal groove 120.

Referring to fig. 9, the valve body 11 includes a first valve body portion 141, a second valve body portion 142, and a third valve body portion 143, the first valve body portion 141, the second valve body portion 142, and the third valve body portion 143 are substantially cylindrical in shape, and when viewed in cross section, the diameter of the first valve body portion 141 in the radial direction is greater than the diameter of the second valve body portion 142 in the radial direction, the diameter of the second valve body portion 142 in the radial direction is greater than the diameter of the third valve body portion 143 in the radial direction, the third valve body portion 143 is lower than the second valve body portion 142, the second valve body portion 142 is lower than the first valve body portion 141 in the height direction, the maximum of the third valve body portion 143 is smaller than the maximum of the second valve body portion 142, the maximum of the second valve body portion 142 is smaller than the maximum of the first valve body portion 141, and the second valve body portion 142 is located between the first valve body portion 141 and the third valve body portion 143; referring to fig. 10, the first seal groove 118 is located relatively above the first body portion 141, the second seal groove 119 is located relatively below the first body portion 141 and relatively above the second body portion 142, the third seal groove 120 is located relatively below the second body portion 141 and relatively above the third body portion 143, or the second seal groove 119 is located between the first body portion 141 and the second body portion 142, and the third seal groove 120 is located between the second body portion 142 and the third body portion 143. Referring to fig. 10, the third and fourth inner ports 113 and 114 and the second flow channel 117 are located in the first valve body 141, the second inner port 112 is located in the second valve body 142, the first inner port 111 is located in the third valve body 143, the first flow channel 115 is located partially in the second valve body 142 and partially in the third valve body 143, and the throttle 116 is located substantially inside the corresponding position of one or both of the second valve body 142, the third seal groove 120, and the third valve body 143. The first inner port 111 and the second inner port 112 are communicated with the valve body assembly by the engagement of the throttle portion 116, the third seal ring 133 is provided so that the first inner port 111 and the second inner port 112 are not communicated with each other through the space between the outer wall portion of the valve body and the outer valve body, and the second seal ring 132 is provided so that the second inner port 112 and the third inner port 113 and the fourth inner port 114 are not communicated with each other through the space between the outer wall portion of the valve body and the outer valve body. The size, the appearance and the interface of the inner valve body of the expansion valve can be relatively standardized, and the outer valve bodies with different structures, which are mutually combined with the expansion valve, are selected according to the requirements of different systems, so that the production efficiency is improved.

Referring to fig. 4, the outer valve body 100 of the present embodiment includes a first interface part 121, a second interface part 122, a third interface part 123, and a fourth interface part 124, the first interface part 121 has a first interface 1211 and a first external interface 1212, the second interface part 122 has a second interface 1221 and a second external interface 1222, the third interface part 123 has a third interface 1231 and a third external interface 1232, the fourth interface part 124 has a fourth interface 1241 and a fourth external interface 1242, with reference to fig. 8, the first interface 1211 is correspondingly engaged and communicated with the first internal interface 111 of the inner valve body, the second interface 1221 is correspondingly engaged and communicated with the second internal interface 112 of the inner valve body, the third interface 1231 is correspondingly engaged and communicated with the third internal interface 113 of the inner valve body, and the fourth interface 1241 is correspondingly engaged and communicated with the fourth internal interface 114 of the inner valve body. Of course, only the first interface 121 and the second interface 122 may be included here, and the cavity in the power head part may be communicated with the portion requiring temperature sensing through the connecting pipe.

Referring to fig. 4, 8 and 10, when the inner valve body 100 and the outer valve body 200 are assembled, the first inner port 111 communicates with the first port 1211, the second inner port 112 communicates with the second port 1221, the first port 1211 communicates with the second port 1221 through the first flow passage 115, the third inner port 123 communicates with the third port 1231, the fourth inner port 114 communicates with the fourth port 1241, and the third port 1231 communicates with the fourth port 1241 through the second flow passage 117.

The first interface 1211 is equal to or larger than the first inner interface 111 of the valve body 11, the second interface 1221 is equal to or larger than the second inner interface 112 of the valve body 11, the third interface 1231 is equal to or larger than the third inner interface 113 of the valve body 11, the fourth interface 1241 is equal to or larger than the fourth inner interface 114 of the inner valve body, the first outer interface 1212 of the first interface unit 121 is larger than the first interface 1211, the second outer interface 1222 of the second interface unit 122 is larger than the second interface 1221, the third outer interface 1232 of the third interface unit 123 is larger than the third interface 1231, the fourth outer interface 1242 of the fourth interface unit 124 is larger than the fourth interface 1241, the outer side of the first outer interface 1212 is equal to or larger than the inner side of the first interface 1211 close to the inner valve body, the outer side of the second outer interface 1222 is equal to or larger than the inner side of the second interface 1221 close to the inner valve body, the outer side of the third outer interface 1232 is equal to or larger than the inner side of the third interface 1231 close to the inner valve body, and the outer side of the fourth interface 1242 is equal to or larger than the inner side of the inner valve body close to the inner valve body, the two functions are realized, on one hand, the enough flow area of each interface can be ensured within an allowable error range when the expansion valve is processed and assembled, the flow resistance is reduced, on the other hand, the position of the sealing groove and the installation of the internal belleville spring are not influenced, and the appearance of the whole expansion valve can be reduced. The size in this context refers to the size of the flow area, for example, the outer side of the first external connection port 1212 is equal to or larger than the inner side of the first connection 1211 that is close to the inner valve body, and in the case of a non-completely regular shape, the flow area of the outer side of the first external connection port that faces outwards is equal to or larger than the flow area of the inner side that is relatively close to the inner valve body.

The outer valve body of the expansion valve and the heat exchanger can be welded and fixed into a whole, and then the inner valve body is assembled to the outer valve body of the expansion valve and the assembly of the heat exchanger to form a heat exchange assembly; the expansion valve and the heat exchanger may be fixed by other means such as bolts, and the present invention is not limited thereto. If the system has installation requirements on the sizes and the positions of the inlet and the outlet, the inner valve body can be unchanged only by changing the structure or the size of the outer valve body, so that the standardization of the inner valve body can be realized, and the number of parts and the total cost can be reduced. The structure of the expansion valve and the like can refer to the above-described embodiments.

In the heat exchanger, the first external port 1212 is used as a first inlet, the first inlet is a flow inlet of the first heat exchange medium, the fourth external port 1242 is a first outlet, and the first outlet is an outflow port of the first heat exchange medium; in practical applications, a fluid such as a refrigerant may flow in from the first external port 1212, enter the first heat exchange channel of the heat exchanger through the first interface 1211, the first internal port 111, the first flow channel 115, the valve port of the expansion valve, the second internal port 112, the second interface 1221, and the second external port 1222, exchange heat with the fluid in the first heat exchange channel in the heat exchanger, and flow out from the heat exchanger through the third external port 1232, the third interface 1231, the third internal port 113, the second flow channel 117, and the fourth interface 1241, and through the fourth external port 1242.

The second interface portion 122 is fixedly connected to the heat exchanger 10, and the third interface portion 123 is fixedly connected to the heat exchanger 10, and the outer valve body and the heat exchanger are fixed by welding in this embodiment, but of course, other welding fixing methods such as laser welding may also be adopted.

Referring to fig. 1 and 5, the heat exchanger 70 further includes a first connection pipe 761 and a second connection pipe 762, the first connection pipe 761 having a second inlet 725, the second connection pipe 762 having a second outlet 726, the second inlet serving as an inflow port of the second heat exchange medium, and the second outlet serving as an outflow port of the second heat exchange medium. One end of the first connection pipe 761 is welded to the heat exchange core or the heat exchanger, and one end of the second connection pipe 762 is welded to the heat exchange core 71 or the heat exchanger 70. The first connection pipe 761 has a first connection pipe passage 7611, the second connection pipe 762 has a second connection pipe passage 7621, the first connection pipe passage 7611 is communicated with the second heat exchange passage 744 through the corner hole 75, the second connection pipe passage 7621 is communicated with the second heat exchange passage 744 through the corner hole 75, and the second heat exchange medium flows in from the second inlet and flows out from the second outlet.

Referring to fig. 6, in an embodiment of the present invention, the heat exchanger 70 further includes a cover plate 73, the cover plate 73 includes a plurality of mounting holes 731, and the cover plate 73 is fixedly connected to the heat exchanging core 70 through the mounting holes 731.

Referring to fig. 12 and 13, in an embodiment of the present invention, a positioning structure is included between the inner valve body and the outer valve body, the valve body 11 includes a positioning portion 24, the positioning portion 24 is located at a position opposite to the top of the valve body 11, the positioning portion 24 is located at an upper side of the first sealing groove 118, the positioning portion 24 includes a positioning notch 25, the positioning portion 24 includes a first positioning surface 251 at the positioning notch 25, the first positioning surface 251 may be a plane surface, the outer valve body 100 includes a fitting positioning portion 26, the fitting positioning portion 26 may be a convex structure, the fitting positioning portion 26 is located at an inner wall surface of the outer valve body 100, the fitting positioning portion 26 includes a second positioning surface 261, the second positioning surface 261 of the fitting positioning portion 26 of the present embodiment is a plane structure, the fitting positioning portion 26 and the positioning notch 25 are matched, the first positioning surface 251 is matched with the second positioning surface 261 to prevent the inner valve body from rotating circumferentially relative to the outer valve body, or the first positioning surface 251 is abutted against the second positioning surface 261 during rotation, thereby realizing the positioning purpose. The positioning notches 25 and the fitting positioning portions 26 match when the inner valve body 200 is assembled with the outer valve body 100. The positioning notch 25 is arranged in the circumferential direction of the positioning part 24, and the matching positioning part is arranged at the corresponding part of the outer valve body, and the positioning notch and the matching positioning part are matched with each other, so that the inner valve body 200 is prevented from rotating along the circumferential direction when the air conditioning system works. In addition, the positioning matching structure can be arranged oppositely, namely a notch part is arranged on the inner wall part of the outer valve body, and a corresponding matched convex structure is arranged on the inner valve body, so that the aim of corresponding positioning can be fulfilled. Adjusting part and valve body relatively fixed in this embodiment, if through thread tightening, in addition, adjusting part also can pass through thread tightening with outer valve body, promptly, make the valve body part of interior valve body and outer valve body equipment back, install adjusting part again or install case and adjusting part again, and adjust the expansion valve through adjusting part, can avoid both equipment errors like this, so that the control of expansion valve is more accurate, adjusting part can with outer valve body screw-thread fit, also can with the valve body screw-thread fit of interior valve body. In this embodiment, the positioning notch serves as a notch portion of the positioning structure, and the positioning portion is used as a protrusion portion of the positioning structure. Here, the convex portion is a structure having a relatively large number of regular shapes, and the notch portion or the concave portion is a structure having a relatively small number of regular shapes.

Referring to fig. 16, in another embodiment of the present invention, the valve body 11 includes a positioning portion 34, at least most of the positioning portion 34 is located on the upper side of the first sealing groove 118, the valve body 11 of this embodiment has two positioning holes 372 in the positioning portion 34, the positioning portion 34 further includes two plug pins 373, each plug pin 373 is located at least partially in the positioning hole 372, the outer valve body has a recess corresponding to the plug pin, the plug pin is located at least partially in the recess of the outer valve body, and the valve body 11 and the outer valve body are positioned by the plug pin 373. In addition, only one bolt can be arranged, and the aim of relative positioning can be achieved. In this embodiment, the latch is used as a protrusion of the positioning structure.

Referring to fig. 14, 15, and 17, the outer valve body 400 includes a limiting portion 41, and the limiting portion 41 includes a clamping groove 411; the powerhead assembly 12 includes a gas box head 102; the expansion valve further comprises a clamping ring 42, the clamping ring 42 comprises a main body part 421 and clamping parts 422, the clamping ring is made of elastic materials, a certain distance is reserved between the two clamping parts 422, the clamping ring 42 can be arranged in the clamping groove 411 after being compressed, after the clamping ring 42 is arranged in the clamping groove 411, the clamping ring 42 is flicked and at least partially positioned in the clamping groove 411, and at least partially positioned above the inner valve body, so that the inner valve body is limited to be separated from the outer valve body from the axial direction, and the limiting of the inner valve body and the outer valve body is realized; specifically, the main body 421 of the snap ring 42 is at least partially located in the engaging groove 411, the snap ring 42 is at least partially located above the air box head 102, and abuts against the air box head 102 when the air box head 102 is going to be upward, the engaging portion may further be provided with a through hole 423, and the through hole may facilitate installation. The sealing manner between the inner valve body and the outer valve body 400 can refer to the above-described embodiments, and in addition, a limit structure for preventing the inner valve body from rotating relatively is provided between the inner valve body and the outer valve body 400, which can also refer to the above-described contents to prevent the inner valve body of the expansion valve from rotating in the circumferential direction when the air conditioning system is in operation.

Referring to fig. 1 to 17, the present invention also provides a method for manufacturing a heat exchange device, the method comprising the steps of:

s1): providing a heat exchanger 70 and an outer valve body 100, wherein the outer valve body 100 comprises a first interface part 121 and a second interface part 122, the heat exchanger comprises a heat exchange core 71, the heat exchange core is provided with an angle hole 75, the outer valve body 100 and the heat exchanger 70 are fixedly connected, the outer valve body 100 is communicated with the heat exchange core 71 through the angle hole 75, the heat exchanger 70 is provided with a first heat exchange channel 743 and a second heat exchange channel 744, so that the first interface part 121 is communicated with the first heat exchange channel 743 of the heat exchanger 10, and the second heat exchange channel 744 and the first heat exchange channel 743 can exchange heat;

s2): providing an inner valve body 200 and a seal ring (131/132/133), pressing the seal ring into a seal groove (118/119/120) of the inner valve body 200;

s3): the inner valve body 200 is pressed into the outer valve body 100 through external pressure, and the butt joint of the inner interface of the inner valve body 200 and the interface of the outer valve body is ensured as much as possible, so that the first outer interface is communicated with the first inner interface, and the second outer interface is communicated with the second inner interface;

s4): the outer valve body 100 and the inner valve body 200 comprise a positioning structure and a limiting structure, so that the inner valve body and the outer valve body can be detachably connected to form the heat exchange device.

The positioning structure comprises a convex part arranged on the outer valve body, a concave part or a gap part arranged on the expansion valve, or the positioning structure comprises a concave part or a gap part arranged on the outer valve body and a convex part arranged on the expansion valve, the limiting structure comprises a limiting groove of the outer valve body, a power head assembly of the expansion valve and a limiting clamping ring, the positioning structure is used for positioning and connecting the expansion valve and the outer valve body, and the limiting structure is used for limiting and connecting the expansion valve and the outer valve body.

The invention integrates the outer valve body and the heat exchanger, reduces the need of completely replacing the whole expansion valve due to the replacement of the interface, the appearance and the size of the interface of the expansion valve, reduces the manufacturing cost and is beneficial to production management. The inner valve body is detachably connected with the outer valve body, so that the whole heat exchange device can be standardized.

Compared with the prior art, the invention integrates the outer valve body and the heat exchanger, and then inserts the expansion valve integrated heat exchange device, thereby having the following technical effects:

(1) the inner valve body can be standardized and is not limited by the structure of the outer valve body;

(2) when the inner valve body, the outer valve body assembly and the heat exchange device are integrated, if the size of the valve body is changed, the sizes of two interfaces of the outer valve body are only changed;

(3) the whole heat exchanger and expansion valve integrated heat exchange device has the advantages of simple structure and lower manufacturing cost.

Referring to fig. 2 and 6, the outer valve body further comprises a limiting hole 77, the heat exchanger further comprises a limiting column 78, and the limiting column is arranged in the limiting hole 77 for limiting connection so as to ensure smooth circulation of fluid.

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 will understand that modifications and equivalents may be made thereto without departing from the spirit and scope of the invention, and all such modifications and improvements are intended to be included within the scope of the following claims.

Claims (10)

1. A heat exchange device is characterized in that the heat exchange device comprises a heat exchanger and an expansion valve, the expansion valve comprises an outer valve body and an inner valve body, the heat exchanger is fixedly connected with the outer valve body, the inner valve body is detachably connected with the outer valve body, a first heat exchange channel and a second heat exchange channel which are not directly communicated are formed in the heat exchanger, the outer valve body comprises a first interface part and a second interface part, the first interface part is provided with a first interface and a first outer interface, the first outer interface is a first inlet of the heat exchange device, the second interface part is fixedly connected with the heat exchanger, the inner valve body is provided with a first inner interface and a second inner interface, the first inner interface corresponds to and is communicated with the first interface in a matching manner, and the second inner interface corresponds to and is communicated with the second interface in a matching manner; the outer valve body is provided with an accommodating cavity, at least part of the inner valve body is positioned in the accommodating cavity, the second outer interface is communicated with the first heat exchange channel, the inner valve body further comprises a throttling part, the throttling part is provided with a valve port, a first flow channel is arranged between the first inner interface and the second inner interface, the first outer interface is communicated with the first flow channel, the valve port is positioned in the first flow channel, and the flow area of the valve port is smaller than that of other parts of the first flow channel.

2. The heat exchange device of claim 1, wherein the heat exchanger further comprises a heat exchange core and a cover plate, the cover plate is fixedly connected with the heat exchange core body, the heat exchange core body comprises a plurality of stacked plates, the plates have corner holes, the plates comprise a first plate and a second plate, the second plate has the same or similar structure with the first plate, the first plate having first corner holes at opposite corner positions of the first plate, the second plate has second corner holes located at opposite corner positions of the second plate, the first plate and the second plate are fixedly connected, the first corner hole and the second corner hole are oppositely arranged, and a first heat exchange channel or a second heat exchange channel is formed between the adjacent first plate and the second plate.

3. The heat exchange device according to claim 2, wherein the outer valve body further comprises a third interface part and a fourth interface part, the third interface part has a third external interface and a third interface, the fourth interface part has a fourth external interface and a fourth interface, the inner valve body has a third internal interface and a fourth internal interface, the third internal interface corresponds to the third interface and is in matching communication, the fourth internal interface corresponds to the fourth interface and is in matching communication, a second flow channel is arranged between the third internal interface and the fourth internal interface, the third interface part is fixedly connected with the heat exchange core, the fourth external interface is a first outlet of the heat exchange device, the third external interface is in communication with the first heat exchange channel, the fourth external interface is in communication with the second channel, the heat exchanger further comprises a first connecting pipe and a second connecting pipe, the first connecting pipe is provided with a second inlet, the second connecting pipe is provided with a second outlet, one end part of the first connecting pipe is fixedly connected with the heat exchange core body, one end part of the second connecting pipe is fixedly connected with the heat exchange core body, the first connecting pipe is provided with a first connecting pipe channel, the first connecting pipe channel is communicated with the second heat exchange channel through the angle hole, the second connecting pipe is provided with a second connecting pipe channel, and the second connecting pipe channel is communicated with the second heat exchange channel through the angle hole.

4. A heat exchange device according to any one of claims 1 to 3, wherein a first port of the expansion valve is equal to or larger than the first inner port, a second port of the expansion valve is equal to or larger than the second inner port, an outer side portion of the first port facing outward is equal to or larger than an inner side portion of the first port near the inner valve body, and an outer side portion of the second port facing outward is equal to or larger than an inner side portion of the second port near the inner valve body; the expansion valve with be equipped with two sealing washer at least between the outer valve body interior valve body and/or outer valve body is provided with corresponding seal groove the axial direction of height of expansion valve, at least one the sealing washer is higher than first inner interface is less than the second inner interface.

5. The heat exchange device according to claim 4, wherein the valve body comprises a first valve body part, a second valve body part and a third valve body part, the third valve body part is lower than the second valve body part from the height direction, the second valve body part is lower than the first valve body part, the maximum of the third valve body part is smaller than the maximum of the second valve body part, and the maximum of the second valve body part is smaller than the maximum of the first valve body part; the first inner port is arranged on the third valve body part, and the second inner port is arranged on the second valve body part; the first interface is equal to or larger than the first internal interface, and the second interface is equal to or larger than the second internal interface.

6. The heat exchange device of claim 5, wherein the third and fourth internal ports are disposed in a portion of the valve body, and the third and fourth internal ports are in communication; the expansion valve comprises a first sealing groove, a second sealing groove and a third sealing groove, wherein the inner valve body is provided with the first sealing groove, the second sealing groove and the third sealing groove; in the height direction, the first seal groove is located relatively above the third inner port and the fourth inner port, the second seal groove is located relatively below the third inner port and the fourth inner port, the second seal groove is located relatively above the second inner port, the third seal groove is located relatively below the second inner port, and the third seal groove is located relatively above the first inner port.

7. The heat exchange device of any one of claims 1 to 6,

the expansion valve is provided with a positioning structure, the positioning structure comprises a convex part arranged on the outer valve body and a concave part or a gap part arranged on the inner valve body, or the positioning structure comprises a concave part or a gap part arranged on the outer valve body and a convex part arranged on the inner valve body;

or, the inner valve body includes location portion, location portion includes the location breach, the location breach includes first contact surface, first contact surface is the plane, outer valve body includes cooperation location portion, cooperation location portion is located outer valve body internal face, cooperation location portion includes the second contact surface, the second contact surface is the plane, cooperation location portion with when the location breach matches, first contact surface with second contact surface looks butt.

8. The heat exchange device according to claim 7, wherein the outer valve body further comprises a limiting portion, the limiting portion comprises a clamping groove, the power head assembly comprises an air box head, the expansion valve comprises a clamping ring, the clamping ring is made of elastic materials, the clamping ring comprises a main body portion and a clamping portion, the clamping groove can be filled with the clamping ring after the clamping ring is compressed, the clamping ring is filled in the clamping groove, the clamping ring is bounced open, the main body portion of the clamping ring is at least partially located in the clamping groove, the clamping ring is at least partially located above the air box head and abuts against and limits the air box head, the clamping portion is provided with a through hole, and the main material of the clamping ring is aluminum.

9. A method of making a heat exchange device, comprising the steps of:

providing a heat exchanger and an outer valve body, wherein the outer valve body comprises a first interface part and a second interface part, the heat exchanger comprises a heat exchange core body, the heat exchange core body is provided with an angle hole, the outer valve body is fixedly connected with the heat exchange core body, the heat exchanger is provided with a first heat exchange channel and a second heat exchange channel, the first interface part is a first inlet, and the second interface part is communicated with the first heat exchange channel or the second heat exchange channel of the heat exchanger;

providing an inner valve body and a sealing ring, wherein the inner valve body or the outer valve body is provided with a sealing groove, and the sealing ring is pressed into the sealing groove;

pressing the inner valve body into the outer valve body through external pressure, and ensuring that an inner interface of the inner valve body is butted with an interface of the outer valve body as much as possible, so that the first interface part is communicated with the first inner interface, and the second interface part is communicated with the second inner interface;

the outer valve body and the inner valve body comprise a positioning structure and a limiting structure, so that the inner valve body and the outer valve body can be detachably connected to form the heat exchange device according to any one of claims 1 to 8.

10. The manufacturing method according to claim 9, wherein the positioning structure comprises a protrusion disposed on the outer valve body and a recess or a notch disposed on the expansion valve, or the positioning structure comprises a recess or a notch disposed on the outer valve body and a protrusion disposed on the expansion valve, the limiting structure comprises a limiting groove of the outer valve body, and the power head assembly and a limiting snap ring of the inner valve body, the positioning structure connects the inner valve body and the outer valve body in a positioning manner, and the limiting structure connects the inner valve body and the outer valve body in a limiting manner.

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