Throttling device

Abstract

This invention discloses a throttling device, including a valve body and a valve core assembly. The valve body has a receiving cavity, a first interface, a second interface, a first channel, and a second channel, wherein the first interface communicates with the first channel, and the second interface communicates with the second channel. The throttling device has a connecting body, which has a first receiving portion and a first connecting channel. The valve core assembly includes a valve seat with a valve port. A portion of the valve core assembly is located within the receiving cavity, and at least a portion of the valve seat is located within the first receiving portion. The throttling device has a first valve cavity and a second valve cavity. The outer wall surface corresponding to the first receiving portion of the connecting body is a portion of the inner wall surface corresponding to the second valve cavity. The second channel communicates with the first valve cavity, and the second valve cavity communicates with the first channel and the first orifice. The valve port communicates with the first valve cavity and the first connecting channel. This throttling device has a relatively compact structure.

Description

Technical Field

[0001] This invention relates to the field of fluid control technology, and more specifically to throttling devices. Background Technology

[0002] A thermal management system includes a heat exchanger and an expansion valve. The heat exchanger and expansion valve are integrated. The outlet of the expansion valve body is directly connected to the refrigerant inlet of the heat exchanger. The refrigerant outlet of the heat exchanger is connected to other components in the thermal management system through pipelines. Although this scheme can make the overall structure compact, it is not only more complicated to install, but also occupies more space. Summary of the Invention

[0003] The purpose of this application is to provide a compact throttling device.

[0004] A throttling device, comprising a valve body and a valve core assembly, characterized in that the valve body has a receiving cavity, a first interface, a second interface, a first channel, and a second channel, wherein the first interface communicates with the first channel, the second interface communicates with the second channel, the throttling device has a connecting body, the connecting body having a first receiving portion and a first connecting channel, and the valve core assembly includes a valve seat having a valve port;

[0005] A portion of the valve core assembly is located within the receiving cavity, and at least a portion of the valve seat is located within the first receiving portion. The throttling device has a first valve cavity and a second valve cavity. The outer wall surface corresponding to the first receiving portion of the connector is a portion of the inner wall surface corresponding to the second valve cavity. The second channel communicates with the first valve cavity. The second valve cavity communicates with the first channel and the first orifice. The valve port is capable of communicating with the first valve cavity and the first connecting channel.

[0006] The provided throttling device has a connector, a first valve chamber and a second valve chamber. The second valve chamber is open at one end away from the valve seat. The outer wall surface corresponding to the first receiving part of the connector is part of the inner wall surface corresponding to the second valve chamber. The second channel is connected to the first valve chamber. The second valve chamber is connected to the first channel and the first orifice. The valve port can connect the first valve chamber and the first connecting channel. The structure is relatively compact. Attached Figure Description

[0007] Figure 1 This is a cross-sectional schematic diagram of one embodiment of a heat exchange device;

[0008] Figure 2 yes Figure 1 A partially enlarged structural diagram;

[0009] Figure 3 yes Figure 1 Schematic diagram of the middle connector;

[0010] Figure 4 This is a cross-sectional schematic diagram of another embodiment of the heat exchange device;

[0011] Figure 5 This is a cross-sectional schematic diagram of a throttling device in another embodiment of a heat exchange device;

[0012] Figure 6 This is a cross-sectional schematic diagram of a throttling device in another embodiment of a heat exchange device;

[0013] Figure 7 This is a cross-sectional schematic diagram of a throttling device in another embodiment of a heat exchange device;

[0014] Figure 8 This is a cross-sectional schematic diagram of a throttling device in another embodiment of a heat exchange device. Detailed Implementation

[0015] The specific implementation method will be described below with reference to the accompanying drawings.

[0016] Please see Figure 1 The heat exchange device 1000 includes a heat exchange unit 1100 and a throttling device 1200. The heat exchange unit 1100 includes a plate body 1101 and a heat exchange core 1102. The heat exchange core 1102 includes a plurality of stacked plates. The plurality of stacked plates of the plate body 1101 and the heat exchange core 1102 can be fixed by welding, so that the heat exchange unit 1100 forms a first fluid channel and a second fluid channel that are isolated from each other.

[0017] In the heat exchange core 1102, adjacent plates are stacked to form a first inter-plate channel or a second inter-plate channel. One side of a plate is the first inter-plate channel, and the other side is the second inter-plate channel. For ease of description, one of two adjacent plates is defined as the first plate, and the other as the second plate. For example, a first plate and one of the two adjacent second plates form a first inter-plate channel, and with the other second plate, they form a second inter-plate channel. The first and second inter-plate channels are not connected. The fluid in the first inter-plate channel and the fluid in the second inter-plate channel can exchange heat. It should be noted that the lack of communication between the first and second inter-plate channels refers to their non-communication within the heat exchange unit 1100. However, once the heat exchange device 1000 becomes part of the thermal management system, communication may occur.

[0018] In this embodiment, the first fluid channel of the heat exchange unit 1100 is a refrigerant channel, and the second fluid channel is a coolant channel (not shown in the figure). The first fluid channel includes a first channel 1103, a second channel 1104, a plurality of first inter-plate channels, and a third channel 1105. The heat exchange core also has a blocking portion 1106. In the stacking direction of the plates, the first channel 1103 and the second channel 1104 are located on both sides of the blocking portion 1106. It should be noted that the blocking portion 1106 can be an integral structure with one of the plates, or it can be fixed to the plate.

[0019] like Figure 1 As shown, the throttling device 1200 includes a valve body 1201 and a valve core assembly 1211. The valve body 1201 is fixed to the plate 1101 by welding, screw connection, or other methods. The valve body 1201 has a first interface 1241 and a second interface 1242, a first channel 1203, and a second channel 1204, wherein the first interface 1241 communicates with the first channel 1203, and the second interface 1242 communicates with the second channel 1204. The valve body 1201 also has a receiving cavity 1205 with openings at both ends. In this embodiment, the receiving cavity 1205 includes a first opening 1212 with its opening facing away from the heat exchange unit and a second opening 1213 with its opening facing the heat exchange unit. A portion of the valve core assembly 1211 extends into the receiving cavity 1205 through the first opening 1212, and the valve core assembly 1211 is sealed and fixed to the valve body 1201. In this embodiment, the first interface 1241, the second interface 1242, and the opening of the receiving cavity away from the heat exchange unit are located on the same side, which simplifies manufacturing. In another embodiment, the first interface 1241 and the second interface 1242 are located on the same side of the valve body, and the opening of the receiving cavity away from the heat exchange unit can be located on other sides of the valve body. Because the first interface 1241 and the second interface 1242 are located on the same side, only one clamping block needs to be used to fix the external pipe during installation, making installation convenient and requiring less space.

[0020] The valve core assembly 1211 includes a valve core 1214 and a valve seat 1206, the valve seat 1206 having a valve port 1207. In this embodiment, the valve core is a valve needle, which can move relative to the valve seat 1206 to adjust the opening degree of the valve port 1207.

[0021] The throttling device 1200 also has a connector, which includes a pipe body 1210, a fixing part 1209 and a connecting part 1208. The fixing part 1209 and the connecting part 1208 abut against each other. Of course, the fixing part 1209 and the connecting part 1208 can also be an integral structure, or the fixing part 1209 and the connecting part 1208 can be fixedly connected.

[0022] At least a portion of the connector extends into the receiving cavity 1205 through the first opening 1212, and the fixing portion 1209 of the connector is sealed and fixed to the corresponding wall of the receiving cavity 1205, so that the throttling device forms a first valve cavity and a second valve cavity. The first valve cavity and the second valve cavity are isolated from each other and do not communicate with each other. The second valve cavity communicates with the first channel 1103. The first channel 1203 communicates with the second valve cavity, and the second channel 1204 communicates with the first valve cavity. The first interface 1241 and the second valve cavity are connected through the first channel 1203, and the second interface 1242 and the first valve cavity are connected through the second channel 1204. The second valve cavity is open at one end away from the valve seat, and the open end of the second valve cavity communicates with the first channel. The outer wall surface corresponding to the first receiving portion of the connector is a part of the inner wall surface corresponding to the second valve cavity.

[0023] In this embodiment, the fixing part 1209 and the connecting part 1208 are separately provided. Specifically, the wall portion corresponding to the receiving cavity 1205 has a first stepped surface 1215, and the connecting part 1208 includes a first mating part 1216 and a second mating part 1217. The second mating part 1217 protrudes from the first mating part 1216 in the direction toward the plate 1101. The upper end surface of the first mating part 1216 is fixed, abuts, or contacts the first stepped surface 1313. The lower end surface of the first mating part 1216 is fixed or abuts the fixing part 1209, and the fixing part is fixed or abuts the plate.

[0024] The second mating part 1217 has a first receiving part 1218 and a second receiving part 1219 formed therein, with the second receiving part 1219 being closer to the plate body 1101 than the first receiving part 1218. A portion of the valve seat 1206 extends into the first receiving part 1218, and the outer wall surface of the valve seat 1206 is sealed to the inner wall surface of the first receiving part 1218. Specifically, a sealing ring can be used for sealing.

[0025] A portion of the tube body 1210 is located in the second receiving portion 1219. The outer wall surface of the tube body 1210 is sealed and fixed to the inner wall surface of the second receiving portion 1219. Specifically, the sealing and fixing can be achieved by riveting, welding, or other methods. In this embodiment, the inner diameter of the second receiving portion 1219 is smaller than the inner diameter of the first receiving portion 1218. The tube body 1210 has a large-diameter portion, the outer diameter of which is smaller than the inner diameter of the first receiving portion 1218 and larger than the inner diameter of the second receiving portion 1219, so that the large-diameter portion of the tube body 1210 extends into and is accommodated within the connecting portion 1208.

[0026] A portion of the tube body 1210 is located within the first channel, and another portion of the tube body 1210 extends through the blocking portion 1106, connecting the first connecting channel 1220 within the tube body 1210 to the second channel 1104. When the valve core 1214 opens the valve port 1207, the second interface 1242 connects to the second channel 1104 via the second channel 1204, the first valve chamber, the valve port 1207, and the first connecting channel 1220. This allows the refrigerant flowing in from the second interface 1242 to flow directly into the second channel 1104, which is farther from the plate 1101 than the first channel 1103, after being throttled by the throttling device 1200. Furthermore, the position of the blocking portion 1106 and the length of the tube body 1210 can be adjusted according to the application requirements, thereby regulating the lengths of the first and second channels.

[0027] For example, such as Figure 4 In the illustrated embodiment, the length of the first channel 1103 is greater than the length of the second channel 1104 due to the arrangement of the blocking part 1106. This arrangement allows for the presence of a second blocking part in the first channel and a third blocking part in the third channel, dividing both the first and third channels into multiple sub-channels, thereby extending the fluid flow path. In this embodiment, the number of sub-channels divided into the first channel is the same as the number of sub-channels divided into the third channel. This means that the inlet of the refrigerant into the heat exchange unit and the outlet of the refrigerant out of the heat exchange unit can be the same area, reducing restrictions on the installation location of the throttling device and saving on installation components.

[0028] At least a portion of the fixing part 1209 is located within the receiving cavity 1205. The outer wall surface of the fixing part 1209 is sealed and fixed to the corresponding inner wall surface of the receiving cavity 1205, specifically by means of screwing, riveting, interference fit, welding, etc. The fixing part 1209 also has a second connecting channel 1221, which connects the first channel 1203 and the second valve cavity. The first interface 1241 can connect to the first channel 1103 through the first channel 1203, the second connecting channel 1221, and the second valve cavity, thereby allowing the refrigerant that has undergone heat exchange in the heat exchange unit 1100 to flow out of the heat exchange device from the first channel 1103 through the second valve cavity, the second connecting channel 1221, the first channel 1203, and the first interface 1241.

[0029] In this embodiment, the fixing part 1209 is fixed to the inner wall surface corresponding to the receiving cavity 1205 by welding. This fixing method can fix the heat exchange unit, valve body, fixing part, connecting part, pipe body and so on together by brazing.

[0030] It should be noted that the plate 1101 can be an end plate, a bottom plate, a mounting plate, or any other plate or plate-like body located on the end side of the heat exchange unit 1100. The plate 1101 does not necessarily completely cover one end side of the heat exchange unit 1100. The plate 1101 can also have a large thickness and can be varied according to actual needs. As long as it can be fixed to the valve body, it can be called the plate 1101.

[0031] The specific working method of the heat exchange device 1000 is as follows: when the valve core 1214 opens the valve port 1207, the refrigerant can flow in from the second interface 1242. After being throttled by the throttling device 1200, it can directly flow into the second channel 1104 of the heat exchange unit 1100. Then, it flows into the third channel 1105 through a part of the inter-plate channel. After passing through the third channel 1105, it flows into the first channel 1103 through a part of the inter-plate channel. When passing through the heat exchange unit 1100, the throttled refrigerant exchanges heat with the coolant in the coolant channel and absorbs the heat of the coolant. Then, it flows out of the heat exchange device through the second valve chamber, the second connecting channel 1221, the first channel 1203 and the first interface 1241.

[0032] Figure 5 Another throttling device 1200 with a different structure is shown. In this embodiment, the fixing part and the connecting part are an integral structure. The outer periphery of the first mating part extends outward from the heat exchange unit 1100 to form the fixing part, and a second valve cavity is formed between the inner wall of the fixing part and the outer wall of the second mating part. The other structures of the fixing part and the connecting part are the same as or similar to those in the above embodiments, and will not be described in detail here.

[0033] In this embodiment, to facilitate the processing of the valve body 1201, the second channel 1204 is an inclined channel connecting the second interface 1242 and the first valve chamber. The first channel 1203 includes a hole 1222 and a groove 1223, wherein the hole 1222 communicates with the first interface 1241, and the opening of the groove 1223 faces the plate 1101 and is closed by the plate 1101.

[0034] In this embodiment, the fixing part and the connecting part are an integral structure, while the pipe body and the connecting part are separate structures. This structure facilitates the fixing of the connecting body and the valve body. The connecting body is fixed to the valve body, heat exchange unit, etc. by brazing. Furthermore, the size of the pipe body can be set according to the size of the first channel to prevent the pipe body from extending into the first channel and causing excessive fluid pressure drop in the first channel. This makes it more flexible in its application.

[0035] Figure 6 Another type of throttling device 1200 is shown, which is different from... Figure 5In the illustrated embodiment, the fixing part and the connecting part are an integral structure, and there is no tube body in this embodiment. The second mating part 1217 of the connecting part extends towards the heat exchange unit and passes through the blocking part. Figure 7 As shown, the first mating part can also function as a fixing part. In this way, the thickness of the first mating part is greater than that of the fixing part. Figure 5 In the illustrated embodiment, the first mating part has a relatively large thickness, and its outer wall surface is fixed to the inner wall surface of the receiving cavity by interference fit, screw connection, or welding. This method simplifies the installation of the connector.

[0036] Figure 8 Another type of throttling device 1200 is shown, which is different from... Figure 5 In the illustrated embodiment, the valve body 1201 and the connecting body are integrally formed. The valve body has a connecting portion 1208, which has a first receiving portion 1218. A portion of the valve seat 1206 is located in the first receiving portion, and a portion of the valve seat 1206 extends into the first receiving portion 1218. The outer wall surface of the valve seat 1206 and the inner wall surface of the first receiving portion 1218 are sealed together. The connecting portion 1208 also has a first connecting channel 1220, which is part of the receiving cavity. The first opening 1212 of the receiving cavity communicates with the second channel 1104. This embodiment has fewer components and is simpler to install.

[0037] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present invention. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A throttling device, the throttling device comprising a valve body and a valve core assembly, characterized in that, The valve body has a receiving cavity, a first interface, a second interface, a first channel, and a second channel, wherein the first interface is connected to the first channel, and the second interface is connected to the second channel. The throttling device has a connecting body, the connecting body has a first receiving portion and a first connecting channel, and the valve core assembly includes a valve seat, the valve seat having a valve port. A portion of the valve core assembly is located within the receiving cavity, and at least a portion of the valve seat is located within the first receiving portion. The throttling device has a first valve cavity and a second valve cavity, with the second valve cavity opening at one end away from the valve seat. The outer wall surface corresponding to the first receiving portion of the connector is a portion of the inner wall surface corresponding to the second valve cavity. The second channel communicates with the first valve cavity, and the second valve cavity communicates with the first channel and the first passage of the heat exchange unit. The valve port is capable of communicating with the first valve cavity and the first connecting channel.

2. The throttling device according to claim 1, characterized in that, The receiving cavity includes a first opening facing away from the heat exchange unit and a second opening facing the heat exchange unit. The connector and the valve body are separate structures. The connector includes a fixing part and a connecting part. The connecting part has the first receiving part. At least a portion of the connector extends into the receiving cavity through the second opening. The fixing part is sealed and fixed to the wall of the receiving cavity, so that the throttling device forms the first valve cavity and the second valve cavity. The second valve cavity is located between the fixing part and the connecting part.

3. The throttling device according to claim 2, characterized in that, The fixing part and the connecting part are separately disposed. The wall of the receiving cavity is formed with a first stepped surface. The connecting part includes a first mating part and a second mating part. The second mating part protrudes from the first mating part. The upper end surface of the first mating part is fixed, abuts, or contacts the first stepped surface. The lower end surface of the first mating part is fixed or abuts the fixing part.

4. The throttling device according to claim 3, characterized in that, The outer wall of the fixing part is sealed and fixed to the inner wall of the receiving cavity by screwing, riveting, interference fit or welding. The fixing part has a second connecting channel, which connects the first channel and the second valve cavity. The first interface is connected to the second valve cavity through the first channel and the second connecting channel.

5. The throttling device according to claim 4, characterized in that, The connector also has a tube body, the first connecting channel is located in the tube body, the second mating part has a first receiving part and a second receiving part formed therein, the second receiving part is away from the valve seat relative to the first receiving part, a part of the tube body is located in the second receiving part, and the outer wall surface of the tube body is sealed and fixed with the inner wall surface of the second receiving part.

6. The throttling device according to claim 5, characterized in that, The inner diameter of the second receiving part is smaller than the inner diameter of the first receiving part. The tube body has a large diameter part, the outer diameter of which is smaller than the inner diameter of the first receiving part and larger than the inner diameter of the second receiving part. The outer wall surface of the tube body is welded or riveted to the inner wall surface of the second receiving part.

7. The throttling device according to claim 2, characterized in that, The fixing part and the connecting part are an integral structure. The wall of the receiving cavity is formed with a first stepped surface. The connecting part includes a first mating part and a second mating part. The second mating part protrudes from the first mating part. The upper end surface of the first mating part is fixed, abuts, or contacts the first stepped surface. The outer periphery of the first mating part extends away from the valve seat to form the fixing part. The second valve cavity is located between the inner wall surface of the fixing part and the outer wall surface of the second mating part.

8. The throttling device according to any one of claims 1-7, characterized in that, The receiving cavity includes a first opening facing away from the heat exchange unit. The first opening, the first interface, and the second interface are located on the same side of the valve body. The connector and the valve body are an integral structure. The second channel is an inclined channel. The first channel includes a hole and a groove. The hole communicates with the first interface, and the groove communicates with the hole and the second valve cavity.

9. The throttling device according to any one of claims 1-7, characterized in that, The connector includes a connecting part, a fixing part, and a tube body. The connecting part includes a first mating part. The receiving cavity includes a first opening facing away from the heat exchange unit. The connecting part and the tube body are integrally formed. The fixing part and the first mating part are integrally formed. The outer wall surface of the first mating part is fixed to the inner wall surface of the receiving cavity by interference fit, screw connection, or welding. The first opening, the first interface, and the second interface are located on the same side of the valve body. The second channel is an inclined channel. The first channel includes a hole and a groove, wherein the hole communicates with the first interface, and a portion of the groove is the second valve cavity.

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