Plate heat exchanger

Abstract

A plate heat exchanger, comprising a first liquid intake pipe (110), a first liquid output pipe (120) and a heat-exchange flow guide unit (210), wherein the heat-exchange flow guide unit (210) comprises a first liquid intake channel (211), a first heat-exchange flow channel (212) and a first liquid storage channel (213) that are in communication with one another in sequence, the first liquid intake channel (211) being in communication with the first liquid intake pipe (110), and the first liquid storage channel (213) being in communication with the first liquid output pipe (120).

Description

Plate heat exchanger

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 27, 2024, with application number 202410360311.2, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of heat exchange technology, for example, to a plate heat exchanger. Background Art

[0003] In related technologies, components such as plate heat exchangers and liquid reservoirs in heat exchange systems are installed separately, requiring pipes to connect multiple components. This not only hinders system layout but also increases the overall system footprint. Furthermore, sealing rings are often used between the plate heat exchanger and the pipelines, and between the liquid reservoir and the pipelines, increasing the risk of leakage. Summary of the Invention

[0004] The present application provides a plate heat exchanger that integrates a first liquid storage channel and a first heat exchange channel.

[0005] The present application provides a plate heat exchanger, comprising a first liquid inlet pipe, a first liquid outlet pipe and a heat exchange drainage unit, the heat exchange drainage unit comprising a first liquid inlet channel, a first heat exchange flow channel and a first liquid storage channel connected in sequence, the first liquid inlet channel being connected to the first liquid inlet pipe, and the first liquid storage channel being connected to the first liquid outlet pipe.

[0006] In some embodiments, the heat exchange and drainage unit includes a plurality of heat exchange and drainage plate groups that are stacked in sequence, and a first heat exchange channel is formed between two adjacent heat exchange and drainage plate groups. The heat exchange and drainage plate groups are provided with a first liquid inlet hole and a first liquid storage hole. The hole wall of the first liquid inlet hole is surrounded to form a first liquid inlet channel. The edge of the first liquid storage hole is surrounded by a first convex edge. The first convex edge of each heat exchange and drainage plate group is connected to the edge of the first liquid storage hole of the adjacent heat exchange and drainage plate group, so that the multiple first convex edges and the hole walls of the multiple first liquid storage holes cooperate to form a first liquid storage channel. An opening is provided on the first convex edge, and the first heat exchange channel is connected to the first liquid storage channel through the opening.

[0007] In some embodiments, the opening is located on a side of the first convex edge facing away from the first liquid inlet hole.

[0008] In some embodiments, the plate heat exchanger also includes a first heat exchange unit, which includes a second liquid inlet channel, a second heat exchange channel and a second liquid outlet channel connected in sequence, the second liquid inlet channel is connected to the first liquid inlet pipe, and the second liquid outlet channel is connected to the first liquid inlet channel.

[0009] In some embodiments, the first heat exchange unit further includes a second liquid storage channel, and the first liquid storage channel is connected to the first liquid outlet pipe through the second liquid storage channel.

[0010] In some embodiments, the first heat exchange unit includes a plurality of first heat exchange plate groups that are stacked in sequence at intervals, and a second heat exchange channel is formed between two adjacent first heat exchange plate groups. The first heat exchange plate group is provided with a second liquid inlet hole, a second liquid outlet hole and a second liquid storage hole. The hole wall of the second liquid inlet hole is formed to form a second liquid inlet channel, the hole wall of the second liquid outlet hole is formed to form a second liquid outlet channel, and the edge of the second liquid storage hole is provided with a second convex edge. The second convex edge of each first heat exchange plate group is connected to the edge of the second liquid storage hole of the adjacent first heat exchange plate group, so that the multiple second convex edges cooperate with the inner walls of the multiple second liquid storage holes to form a second liquid storage channel.

[0011] In some embodiments, the plate heat exchanger further includes a first reversing plate, which is sandwiched between the first heat exchange unit and the heat exchange drainage unit. The first reversing plate is provided with a first through hole, and the second liquid outlet channel is connected to the first liquid inlet channel through the first through hole.

[0012] In some embodiments, the plate heat exchanger also includes a supercooling unit, which includes a third liquid inlet channel, a third liquid storage channel and a third heat exchange channel. The third liquid inlet channel is separated from the third heat exchange channel, and the first liquid inlet channel is connected to the first liquid inlet pipe through the third liquid inlet channel. The first liquid storage channel, the third liquid storage channel, the third heat exchange channel and the first liquid outlet pipe are connected in sequence.

[0013] In some embodiments, the supercooling unit includes a plurality of supercooling plate groups that are stacked in sequence with intervals therebetween, and a third heat exchange channel is formed between two adjacent supercooling plate groups. The supercooling plate groups are provided with a third liquid inlet hole and a third liquid storage hole. The edge of the third liquid inlet hole is surrounded by a third convex edge. The third convex edge of each supercooling plate group is connected to the edge of the third liquid inlet hole of the adjacent supercooling plate group, so that the multiple third convex edges and the hole walls of the multiple third liquid inlet holes cooperate to form a third liquid inlet channel, and the hole walls of the third liquid storage hole are surrounded to form a third liquid storage channel.

[0014] In some embodiments, at least one of a drying element and a filtering element is disposed in the first liquid storage channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a structural schematic diagram of a plate heat exchanger provided in Example 1;

[0016] FIG2 is a second structural diagram of the plate heat exchanger provided in Example 1;

[0017] FIG3 is a schematic diagram of the explosion structure of the plate heat exchanger provided in Example 1;

[0018] FIG4 is a third structural diagram of the plate heat exchanger provided in Example 1;

[0019] FIG5 is a cross-sectional view in the direction AA in FIG4 ;

[0020] FIG6 is a schematic diagram of the refrigerant flow in Example 1;

[0021] FIG7 is a schematic structural diagram of the heat exchange and guide plate assembly provided in Example 1;

[0022] FIG8 is a schematic structural diagram of the first heat exchange plate assembly provided in Example 1;

[0023] FIG9 is a schematic structural diagram of a first reversing plate provided in Example 1;

[0024] FIG10 is a schematic structural diagram of the second heat exchange plate assembly provided in Example 1;

[0025] FIG11 is a schematic structural diagram of a second reversing plate provided in Example 1;

[0026] FIG12 is a schematic cross-sectional view of the plate heat exchanger provided in Example 2;

[0027] FIG13 is a schematic diagram of the refrigerant flow in Example 2;

[0028] FIG14 is a schematic structural diagram of the supercooling plate assembly provided in the second embodiment.

[0029] In the figure: 110, first liquid inlet pipe; 120, first liquid outlet pipe; 130, second liquid inlet pipe; 140, second liquid outlet pipe; 200, heat exchange structure; 210, heat exchange drainage unit; 211, first liquid inlet channel; 212, first heat exchange flow channel; 213, first liquid storage channel; 214, heat exchange drainage plate assembly; 2141, first liquid inlet hole; 2142, first liquid storage hole; 2143, first convex edge; 2144, opening; 2145, first liquid outlet hole; 214 6. Drainage trough; 220, first heat exchange unit; 221, second liquid inlet channel; 222, second heat exchange channel; 223, second liquid outlet channel; 224, second liquid storage channel; 225, first heat exchange plate assembly; 2251, second liquid inlet hole; 2252, second liquid outlet hole; 2253, second liquid storage hole; 2254, second flange; 231, first reversing plate; 2311, first through hole; 2312, second through hole; 2313, fourth flange; 231 4. First blind plate; 240. Subcooling unit; 241. Third liquid inlet channel; 242. Third liquid storage channel; 243. Third heat exchange channel; 244. Subcooling plate group; 2441. Third liquid inlet hole; 2442. Third liquid storage hole; 2443. Third flange; 250. Second heat exchange unit; 251. Fourth liquid inlet channel; 252. Fourth heat exchange channel; 253. Fourth liquid outlet channel; 254. Fourth liquid storage channel; 255. Second heat exchange plate group; 25 51. Fourth liquid inlet hole; 2552. Fourth liquid outlet hole; 2553. Fourth liquid storage hole; 2554. Fifth flange; 261. Second reversing plate; 2611. Third through hole; 2612. Fourth through hole; 2613. Sixth flange; 2614. Second blind plate; 271. Third reversing plate; 310. Drying element; 320. Filter element; 410. First end plate; 420. Second end plate; 430. Flow channel plate; 440. Plug cover; 450. Retaining spring. DETAILED DESCRIPTION

[0030] The present application is described in detail below in conjunction with the accompanying drawings and embodiments. The specific embodiments described herein are intended to explain the present application, not to limit the present application. For ease of description, the accompanying drawings show some, but not all, structures related to the present application.

[0031] In the description of this application, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0032] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or may indicate that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or may indicate that the first feature is at a lower level than the second feature.

[0033] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Furthermore, the terms "first" and "second" are used for descriptive purposes only and do not have any special meanings.

[0034] Example 1

[0035] This embodiment provides a plate heat exchanger for heat exchange between refrigerant and cooling water. As shown in Figures 1 to 3, the plate heat exchanger includes a first liquid inlet pipe 110, a first liquid outlet pipe 120, a second liquid inlet pipe 130, a second liquid outlet pipe 140, a first end plate 410, a second end plate 420, a flow channel plate 430 and a heat exchange structure 200, wherein the first end plate 410 and the flow channel plate 430 are located on the same side of the heat exchange structure 200, and the second end plate 420 is located on the other side of the heat exchange structure 200, the first liquid inlet pipe 110 and the first liquid outlet pipe 120 are both installed on the first end plate 410, and the second liquid inlet pipe 130 and the second liquid outlet pipe 140 are both installed on the second end plate 420.

[0036] Refrigerant enters the heat exchange structure 200 through the first liquid inlet pipe 110, and cooling water enters the heat exchange structure 200 through the second liquid inlet pipe 130. Within the heat exchange structure 200, the refrigerant and the cooling water exchange heat. The refrigerant then exits the heat exchange structure 200 through the first liquid outlet pipe 120, and the cooling water exits the heat exchange structure 200 through the second liquid outlet pipe 140. In other embodiments, cooling water may enter the heat exchange structure 200 through the first liquid inlet pipe 110 and exit the heat exchange structure 200 through the first liquid outlet pipe 120, while the refrigerant enters the heat exchange structure 200 through the second liquid inlet pipe 130 and exits the heat exchange structure 200 through the second liquid outlet pipe 140.

[0037] As shown in FIG5 , the heat exchange structure 200 is provided with a first liquid storage channel 213 and a first heat exchange channel 212 . The plate heat exchanger provided in this embodiment can realize the integration of the first liquid storage channel 213 and the first heat exchange channel 212 .

[0038] In some embodiments, as shown in Figures 1 to 6, the heat exchange structure 200 of the plate heat exchanger includes a heat exchange drainage unit 210, which includes a first liquid inlet channel 211, a first heat exchange channel 212 and a first liquid storage channel 213 connected in sequence. The first liquid inlet channel 211 is connected to the first liquid inlet pipe 110, and the first liquid storage channel 213 is connected to the first liquid outlet pipe 120.

[0039] Based on the above design, the refrigerant can enter the first liquid inlet channel 211 from the first liquid inlet pipe 110, and then flow through the first heat exchange channel 212, the first liquid storage channel 213 and the first liquid outlet pipe 120 in sequence, and finally discharge the plate heat exchanger from the first liquid outlet pipe 120. It can be seen that this structural design realizes the integration of the first liquid storage channel 213 and the first heat exchange channel 212, eliminating the need for separate plate heat exchanger and liquid storage structure, and has the effect of reducing the overall footprint of the heat exchange system. In addition, this structural design eliminates the pipeline connection between the heat exchanger and the liquid storage, solving the problem of leakage caused by sealing failure at the pipeline interface.

[0040] In some embodiments, as shown in Figures 1 to 7, the heat exchange and drainage unit 210 includes a plurality of heat exchange and drainage plate groups 214 that are sequentially spaced and stacked. A first heat exchange flow channel 212 is formed between two adjacent heat exchange and drainage plate groups 214. The heat exchange and drainage plate groups 214 are provided with a first liquid inlet hole 2141 and a first liquid storage hole 2142. The hole wall of the first liquid inlet hole 2141 is surrounded to form a first liquid inlet channel 211. The edge of the first liquid storage hole 2142 is surrounded by a first convex edge 2143. The first convex edge 2143 of each heat exchange and drainage plate group 214 is aligned with the adjacent heat exchange and drainage plate group 214. The edges of the first liquid storage hole 2142 are connected so that the multiple first convex edges 2143 and the hole walls of the multiple first liquid storage holes 2142 cooperate to form a first liquid storage channel 213. An opening 2144 is provided on the first convex edge 2143. The first heat exchange channel 212 is connected to the first liquid storage channel 213 through the opening 2144, so that the refrigerant can enter the multiple first heat exchange channels 212 for heat exchange respectively, and then enter the first liquid storage channel 213 through the corresponding openings 2144 in the multiple heat exchange channels, and finally enter the first liquid outlet pipe 120 from the first liquid storage channel 213 to be discharged from the plate heat exchanger.

[0041] In some embodiments, the edge of the first end of the first liquid storage hole 2142 is provided with a first convex edge 2143, and the edge of the second end of the first liquid storage hole 2142 is flat (i.e., the first convex edge 2143 is not provided). After the multiple heat exchange guide plate groups 214 are stacked in sequence, the first convex edge 2143 of one heat exchange guide plate group 214 is connected to the edge of the first liquid storage hole 2142 of another adjacent heat exchange guide plate group 214, so that the multiple first convex edges 2143 and the hole walls of the multiple first liquid storage holes 2142 cooperate to form the first liquid storage channel 213. In other embodiments, the edges of both ends of the first liquid storage hole 2142 may be provided with a first convex edge 2143. After the multiple heat exchange guide plate groups 214 are stacked in sequence, the first convex edge 2143 of one heat exchange guide plate group 214 is connected to the first convex edge 2143 of another adjacent heat exchange guide plate group 214, so that the multiple first convex edges 2143 and the hole walls of the multiple first liquid storage holes 2142 cooperate to form a first liquid storage channel 213.

[0042] In some embodiments, as shown in Figures 1 to 7, the opening 2144 is located on the side of the first convex edge 2143 away from the first liquid inlet hole 2141. The refrigerant flowing and exchanging heat in the first heat exchange channel 212 can flow from the side of the first liquid storage channel 213 toward the first liquid inlet channel 211 to the side of the first liquid storage channel 213 away from the first liquid inlet channel 211, and then enter the first liquid storage channel 213 through the opening 2144, that is, the refrigerant flows around the first liquid storage channel 213 and then enters the first liquid storage channel 213 (as shown in Figure 6, the dotted line trajectory in the heat exchange drainage unit 210), so that the flow path of the refrigerant can be extended, thereby increasing the heat exchange amount and improving the heat exchange efficiency.

[0043] In some embodiments, as shown in Figures 1 to 7, the heat exchange guide plate group 214 is also provided with a first liquid outlet 2145, and two adjacent first heat exchange channels 212 are connected through the first liquid outlet 2145, so that the refrigerants in different first heat exchange channels 212 can circulate with each other through the first liquid outlet 2145, thereby improving the heat exchange uniformity of multiple first heat exchange channels 212.

[0044] In some embodiments, as shown in Figures 1 to 7, the heat exchange drainage plate group 214 is also provided with a drainage groove 2146, the first end of the drainage groove 2146 is connected to the first liquid outlet 2145, and the second end of the drainage groove 2146 is connected to the first liquid storage hole 2142. After the refrigerant enters another first heat exchange flow channel 212 through the first liquid outlet 2145 from one first heat exchange flow channel 212, it preferentially enters the first liquid storage channel 213 through the drainage groove 2146. This structural design can reduce the resistance of the refrigerant entering the first liquid storage channel 213.

[0045] In some embodiments, as shown in FIG. 1 to FIG. 7 , both ends of the opening 2144 on the first flange 2143 extend to two opposite inner walls of the drainage groove 2146 to achieve a better drainage effect on the refrigerant.

[0046] In some embodiments, as shown in Figures 1 to 8 , the heat exchange structure 200 of the plate heat exchanger further includes a first heat exchange unit 220. The first heat exchange unit 220 includes a second liquid inlet channel 221, a second heat exchange channel 222, and a second liquid outlet channel 223, which are sequentially connected. The second liquid inlet channel 221 is connected to the first liquid inlet pipe 110, and the second liquid outlet channel 223 is connected to the first liquid inlet channel 211. Refrigerant can flow and exchange heat not only within the heat exchange and drainage unit 210, but also within the first heat exchange unit 220. This improves the heat exchange capacity of the plate heat exchanger and enables its application in heat exchange systems with higher heat exchange requirements. For heat exchange systems with lower heat exchange requirements, the first heat exchange unit 220 can be omitted, that is, only the heat exchange and drainage unit 210 can be provided.

[0047] In some embodiments, as shown in Figures 1 to 8, the first heat exchange unit 220 also includes a second liquid storage channel 224, the second liquid storage channel 224 is separated from the second heat exchange channel 222, and the first liquid storage channel 213 is connected to the first liquid outlet pipe 120 through the second liquid storage channel 224 to expand the liquid storage capacity of the heat exchange structure 200, and the refrigerant in the first heat exchange unit 220 can only flow in multiple second heat exchange channels 222, and will not enter the second liquid storage channel 224. The refrigerant can only enter the second liquid storage channel 224 through the first liquid storage channel 213.

[0048] In some embodiments, as shown in Figures 1 to 8, the first heat exchange unit 220 includes a plurality of first heat exchange plate groups 225 that are sequentially stacked and spaced apart, and a second heat exchange channel 222 is formed between two adjacent first heat exchange plate groups 225. The first heat exchange plate group 225 is provided with a second liquid inlet hole 2251, a second liquid outlet hole 2252, and a second liquid storage hole 2253. The hole wall of the second liquid inlet hole 2251 is surrounded to form a second liquid inlet channel 221, and the hole wall of the second liquid outlet hole 2252 is surrounded to form a second liquid outlet channel 223. The second storage hole 2253 is provided with a second liquid inlet hole 2251, a second liquid outlet hole 2252, and a second liquid storage hole 2253. A second convex edge 2254 is provided around the edge of the liquid hole 2253, and the second convex edge 2254 of each first heat exchange plate group 225 is connected to the edge of the second liquid storage hole 2253 of the adjacent first heat exchange plate group 225, so that the multiple second convex edges 2254 cooperate with the inner walls of the multiple second liquid storage holes 2253 to form a second liquid storage channel 224, so that the refrigerant can enter the multiple second heat exchange channels 222 for heat exchange respectively, and then enter the heat exchange drainage unit 210 from the second heat exchange channel 222 through the second liquid outlet channel 223.

[0049] In some embodiments, the edge of the first end of the second liquid storage hole 2253 is provided with a second flange 2254, and the edge of the second end of the second liquid storage hole 2253 is a plane (that is, the second flange 2254 is not provided). After the multiple first heat exchange plate groups 225 are stacked in sequence, the second flange 2254 of a first heat exchange plate group 225 is connected to the edge of the second liquid storage hole 2253 of another adjacent first heat exchange plate group 225, so that the multiple second flanges 2254 cooperate with the inner walls of the multiple second liquid storage holes 2253 to form a second liquid storage channel 224. In other embodiments, the edges of both ends of the second liquid storage hole 2253 may be provided with a second flange 2254. After the multiple first heat exchange plate groups 225 are stacked in sequence, the second flange 2254 of one first heat exchange plate group 225 is connected to the second flange 2254 of another adjacent first heat exchange plate group 225, so that the multiple second flanges 2254 cooperate with the inner walls of the multiple second liquid storage holes 2253 to form a second liquid storage channel 224.

[0050] In some embodiments, as shown in Figures 1 to 9, the plate heat exchanger further includes a first reversing plate 231, which is sandwiched between the first heat exchange unit 220 and the heat exchange drainage unit 210. The first reversing plate 231 is provided with a first through hole 2311 and a second through hole 2312. The first through hole 2311, the plurality of second liquid outlet holes 2252, and the plurality of first liquid inlet holes 2141 are coaxially arranged so that the second liquid outlet channel 223 is connected to the first liquid inlet channel 211 through the first through hole 2311. The second through hole 2312, the plurality of first liquid storage holes 2142, and the plurality of first liquid storage holes 2141 are coaxially arranged. The second liquid storage holes 2253 are coaxially arranged, so that the first liquid storage channel 213 is connected to the second liquid storage channel 224 through the second through hole 2312, the multiple second liquid inlet holes 2251 are coaxial with the multiple first liquid outlet holes 2145, and a first blind plate 2314 is provided on the first reversing plate 231 at a position opposite to the second liquid inlet hole 2251 to prevent the refrigerant in the second liquid inlet channel 221 from entering the heat exchange drainage unit 210, and ensure that the refrigerant in the second liquid inlet channel 221 flows through the second heat exchange flow channel 222 and then enters the first liquid inlet channel 211 through the first through hole 2311. The edge of the second through hole 2312 is surrounded by a fourth convex edge 2313, the edge of the second liquid storage hole 2253 of the first heat exchange plate group 225 adjacent to the first reversing plate 231 is connected to the fourth convex edge 2313, and the first convex edge 2143 of the heat exchange guide plate group 214 adjacent to the first reversing plate 231 is connected to the edge of the second through hole 2312, so that the first liquid storage channel 213 is connected to the second liquid storage channel 224 through the second through hole 2312, and the sealing of the connection position between the first liquid storage channel 213 and the second liquid storage channel 224 can be achieved.

[0051] In some embodiments, as shown in Figures 1 to 10, the heat exchange structure 200 of the plate heat exchanger also includes a second heat exchange unit 250, which is located on a side of the first heat exchange unit 220 away from the heat exchange and drainage unit 210. The second heat exchange unit 250 includes a fourth liquid inlet channel 251, a fourth heat exchange channel 252, and a fourth liquid outlet channel 253 that are connected in sequence. The fourth liquid inlet channel 251 is connected to the first liquid inlet pipe 110, and the fourth liquid outlet channel 253 is connected to the second liquid inlet channel 221. The refrigerant can flow and exchange heat in the second heat exchange unit 250, the first heat exchange unit 220, and the heat exchange and drainage unit 210 in sequence, thereby improving the heat exchange capacity of the plate heat exchanger and enabling it to be applied to heat exchange systems with larger heat exchange requirements.

[0052] In some embodiments, as shown in Figures 1 to 10, the second heat exchange unit 250 also includes a fourth liquid storage channel 254, the fourth liquid storage channel 254 is separated from the fourth heat exchange channel 252, and the second liquid storage channel 224 is connected to the first liquid outlet pipe 120 through the fourth liquid storage channel 254 to expand the liquid storage capacity of the heat exchange structure 200, and the refrigerant in the second heat exchange unit 250 can only flow in multiple fourth heat exchange channels 252, and will not enter the fourth liquid storage channel 254. The refrigerant can only enter the fourth liquid storage channel 254 through the second liquid storage channel 224.

[0053] In some embodiments, as shown in Figures 1 to 10, the second heat exchange unit 250 includes a plurality of second heat exchange plate groups 255 that are stacked in sequence, and a fourth heat exchange channel 252 is formed between two adjacent second heat exchange plate groups 255. The structure of the second heat exchange plate group 255 is roughly the same as that of the first heat exchange plate group 225, except that the liquid inlet and the liquid outlet are interchanged to achieve the refrigerant diversion between the second heat exchange unit 250 and the first heat exchange unit 220.

[0054] For example, as shown in Figures 1 to 10, on the first heat exchange plate group 225, the second liquid inlet 2251 is located close to the second liquid storage hole 2253, and the second liquid outlet 2252 is located away from the second liquid outlet 2252. The second heat exchange plate group 255 is provided with a fourth liquid inlet 2551, a fourth liquid outlet 2552, and a fourth liquid storage hole 2553. The fourth liquid inlet 2551 is located away from the fourth liquid storage hole 2553, and the fourth liquid outlet 2552 is located close to the fourth liquid storage hole 2553. The hole wall of the fourth liquid inlet hole 2551 is arranged to form a fourth liquid inlet channel 251, the hole wall of the fourth liquid outlet hole 2552 is arranged to form a fourth liquid outlet channel 253, and the edge of the fourth liquid storage hole 2553 is surrounded by a fifth convex edge 2554. The fifth convex edge 2554 of each second heat exchange plate group 255 is connected to the edge of the fourth liquid storage hole 2553 of the adjacent second heat exchange plate group 255, so that multiple fifth convex edges 2554 and the inner walls of multiple fourth liquid storage holes 2553 cooperate to form a fourth liquid storage channel 254, so that the refrigerant can enter the multiple fourth heat exchange channels 252 for heat exchange respectively, and then enter the second heat exchange channel 222 from the fourth heat exchange channel 252 through the fourth liquid outlet channel 253 and the second liquid inlet channel 221 in sequence.

[0055] In some embodiments, as shown in Figures 1 to 11, the plate heat exchanger also includes a second reversing plate 261, which is sandwiched between the first heat exchange unit 220 and the second heat exchange unit 250. The structure of the second reversing plate 261 is roughly the same as that of the first reversing plate 231, except that the position of the blind plate is swapped to achieve the diversion of the refrigerant between the first heat exchange unit 220 and the second heat exchange unit 250.

[0056] For example, as shown in Figures 1 to 11, a third through hole 2611 and a fourth through hole 2612 are provided on the second reversing plate 261. The third through hole 2611, the plurality of fourth liquid outlet holes 2552, and the plurality of second liquid inlet holes 2251 are coaxially arranged so that the fourth liquid outlet channel 253 is connected to the second liquid inlet channel 221 through the third through hole 2611. The fourth through hole 2612, the plurality of second liquid storage holes 2253, and the plurality of fourth liquid storage holes 2553 are coaxially arranged so that the second liquid storage channel 224 It is connected to the fourth liquid storage channel 254 through the fourth through hole 2612, the multiple second liquid outlet holes 2252 are coaxial with the multiple fourth liquid inlet holes 2551, and a second blind plate 2614 is provided on the second reversing plate 261 at a position opposite to the second liquid outlet hole 2252 to prevent the refrigerant in the fourth liquid inlet channel 251 from entering the first heat exchange unit 220, and ensure that the refrigerant in the fourth liquid inlet channel 251 flows through the fourth heat exchange channel 252 and then enters the second liquid inlet channel 221 through the third through hole 2611. The edge of the fourth through hole 2612 is surrounded by a sixth convex edge 2613, the edge of the fourth liquid storage hole 2553 of the second heat exchange plate group 255 adjacent to the second reversing plate 261 is connected to the sixth convex edge 2613, and the second convex edge 2254 of the first heat exchange plate group 225 adjacent to the second reversing plate 261 is connected to the edge of the fourth through hole 2612, so that the second liquid storage channel 224 is connected to the fourth liquid storage channel 254 through the fourth through hole 2612, and the sealing of the connection position between the second liquid storage channel 224 and the fourth liquid storage channel 254 can also be achieved.

[0057] In some embodiments, the waveforms on the heat exchange guide plate group 214, the first heat exchange plate group 225, the first reversing plate 231, the second heat exchange plate group 255 and the second reversing plate 261 can be V-shaped, W-shaped, pitted or inner fin-shaped, etc., depending on actual usage requirements.

[0058] In some embodiments, as shown in Figures 1 to 11, the plate heat exchanger further includes a drying element 310 (such as a drying bag, etc.) and a filter element 320 (such as a filter mesh, etc.). The drying element 310 is arranged in the first liquid storage channel 213 and the second liquid storage channel 224, and the filter element 320 is arranged in the fourth liquid storage channel 254 to achieve drying and filtering effects on the refrigerant.

[0059] In this embodiment, the first end plate 410, the flow plate 430, the heat exchange structure 200, the second end plate 420, the second liquid inlet pipe 130, and the second liquid outlet pipe 140 are integrally brazed. The first end plate 410 is provided with a first flow hole and a second flow hole, and the flow plate 430 is provided with a third flow hole and a fourth flow hole. The first liquid inlet pipe 110 communicates with the fourth liquid inlet channel 251 through the first and third flow holes, and the first liquid outlet pipe 120 communicates with the fourth liquid storage channel 254 through the second and fourth flow holes. The filter element 320 is connected to the flow plate 430 to secure the filter element 320 within the fourth liquid storage channel 254. The second end plate 420 is provided with a threaded hole and a plugging cover 440 that is threadedly matched with the threaded hole. The plugging cover 440 blocks the threaded hole to block the drying element 310 in the first liquid storage channel 213. During actual assembly, the drying element 310 is placed in the first liquid storage channel 213, and then the plugging cover 440 is screwed. Finally, the retaining spring 450 is clamped on the outer periphery of the plugging cover 440 to fix the plugging cover 440. Alternatively, the retaining spring 450 can be omitted and only the threaded structure can be used to fix the plugging cover 440 on the second end plate 420.

[0060] As shown in Figures 1 to 11, the plate heat exchanger provided in this embodiment is provided with a second heat exchange unit 250, a first heat exchange unit 220 and a heat exchange drainage unit 210, wherein the first heat exchange unit 220 is located between the second heat exchange unit 250 and the heat exchange drainage unit 210, the first liquid inlet pipe 110, the fourth liquid inlet channel 251, the fourth heat exchange flow channel 252, the fourth liquid outlet channel 253, the second liquid inlet channel 221, the second heat exchange flow channel 222, the second liquid outlet channel 223, the first liquid inlet channel 211, the first heat exchange flow channel 212, the first liquid storage channel 213, the second liquid storage channel 224, the fourth liquid storage channel 254 and the first liquid outlet pipe 120 are connected in sequence, and the second liquid storage channel 224 and the second heat exchange flow channel 222 are separated from each other, and the fourth liquid storage channel 254 and the fourth heat exchange flow channel 252 are separated from each other, so that the refrigerant can pass through the first liquid inlet pipe 1 10 and the fourth liquid inlet channel 251 enter the fourth heat exchange channel 252 for heat exchange, bypass the fourth liquid storage channel 254 in the fourth heat exchange channel 252, and then enter the second heat exchange channel 222 through the fourth liquid outlet channel 253 and the second liquid inlet channel 221 for heat exchange, bypass the second liquid storage channel 224 in the second heat exchange channel 222, and then enter the first heat exchange channel 212 through the second liquid outlet channel 223 and the first liquid inlet channel 211 for heat exchange, and then enter the first liquid storage channel 213 and the second liquid storage channel 224 in turn from the first heat exchange channel 212. In the first liquid storage channel 213 and the second liquid storage channel 224, the drying element 310 dries the refrigerant, and then the refrigerant enters the fourth liquid storage channel 254. The filter element 320 in the fourth liquid storage channel 254 filters the refrigerant, and then enters the first liquid outlet pipe 120 from the fourth liquid storage channel 254 to be discharged from the plate heat exchanger.

[0061] It can be seen that the plate heat exchanger provided in this embodiment integrates the liquid storage channel, the drying element 310 and the filter element 320 into the heat exchange structure 200, so that the plate heat exchanger not only has a heat exchange function, but also has liquid storage, drying and filtering functions, which greatly reduces the footprint of the heat exchange system, eliminates the need for pipeline connections between the plate heat exchanger, liquid storage, filter and dryer, reduces the difficulty of assembly, and solves the problem of liquid leakage caused by sealing failure at the pipeline interface. On the other hand, since the first liquid storage channel 213, the second liquid storage channel 224, and the fourth liquid storage channel 254 (for ease of understanding, the interconnected first liquid storage channel 213, the second liquid storage channel 224, and the fourth liquid storage channel 254 will be collectively referred to as the liquid storage area below) are all located inside the plate heat exchanger, refrigerant flows on both the inside and outside of the liquid storage area, so that the pressure in the radial direction of the liquid storage area is basically the same. Therefore, no additional sealing ring is required to seal the liquid storage area. It is only necessary to use heat exchange plates of conventional thickness to form a plate group, and then assemble and weld multiple plate groups to achieve the sealing of the liquid storage area. On the other hand, after the refrigerant flows through the fourth heat exchange channel 252, the second heat exchange channel 222, and the first heat exchange channel 212 in sequence through the first liquid inlet pipe 110, it enters the liquid storage area from the first heat exchange channel 212, and then enters the first liquid outlet pipe 120 from the liquid storage area, so that the first liquid inlet pipe 110 and the first liquid outlet pipe 120 can be arranged on the same side of the plate heat exchanger.

[0062] For heat exchange systems with high heat exchange requirements, multiple first heat exchange units 220 and second heat exchange units 250 can be installed, and the multiple first heat exchange units 220 and multiple second heat exchange units 250 can be staggered to form a multi-pass plate heat exchanger structure, thereby extending the flow path of the refrigerant and improving the heat exchange capacity of the plate heat exchanger. For heat exchange systems with lower heat exchange requirements, the second heat exchange unit 250 can be omitted, or both the second heat exchange unit 250 and the first heat exchange unit 220 can be omitted to form a single-pass plate heat exchanger structure. In this case, at least one of the drying element 310 and the filtering element 320 can be installed in the first liquid storage channel 213. The specific configuration depends on the usage requirements and is not listed here.

[0063] In this embodiment, the path for cooling water to enter and exit the heat exchange structure 200 is the same as that of a conventional plate heat exchanger, and will not be described in detail here.

[0064] Example 2

[0065] This embodiment provides a plate heat exchanger. The following mainly describes the differences between this embodiment and the previous embodiments, and the similarities are not repeated here.

[0066] As shown in Figures 12 to 14, the heat exchange structure 200 of the plate heat exchanger further includes a subcooling unit 240, which includes a third liquid inlet channel 241, a third liquid storage channel 242, and a third heat exchange channel 243. The third liquid inlet channel 241 is separated from the third heat exchange channel 243, and the first liquid inlet channel 211 is connected to the first liquid inlet pipe 110 through the third liquid inlet channel 241. The first liquid storage channel 213, the third liquid storage channel 242, the third heat exchange channel 243, and the first liquid outlet are connected. The tubes 120 are connected in sequence, that is, the refrigerant first flows and exchanges heat in the heat exchange drainage unit 210, then passes through the first liquid storage channel 213 and the third liquid storage channel 242 in sequence, and then enters the third heat exchange flow channel 243 from the third liquid storage channel 242 to flow and exchange heat, and finally is discharged from the plate heat exchanger from the first liquid outlet pipe 120. The design of the supercooling unit 240 realizes the effect of reheating the refrigerant after flowing through the liquid storage channel, so that the plate heat exchanger has a supercooling mode, which improves the heat exchange effect of the plate heat exchanger.

[0067] In this embodiment, the heat exchange structure 200 includes a first heat exchange unit 220, a heat exchange and drainage unit 210, and a subcooling unit 240. The first heat exchange unit 220 is located between the heat exchange and drainage unit 210 and the subcooling unit 240. The refrigerant can flow and exchange heat in the first heat exchange unit 220, the heat exchange and drainage unit 210, and the subcooling unit 240, thereby improving the heat exchange capacity of the plate heat exchanger. For heat exchange systems with lower heat exchange requirements, the first heat exchange unit 220 can be omitted, that is, only one heat exchange and drainage unit 210 and one subcooling unit 240 are provided.

[0068] In some embodiments, as shown in Figures 12 to 14, the supercooling unit 240 includes a plurality of supercooling plate groups 244 stacked in sequence, a third heat exchange channel 243 is formed between two adjacent supercooling plate groups 244, the supercooling plate group 244 is provided with a third liquid inlet hole 2441 and a third liquid storage hole 2442, the edge of the third liquid inlet hole 2441 is surrounded by a third convex edge 2443, and the third convex edge 2443 of each supercooling plate group 244 is connected to the edge of the third liquid inlet hole 2441 of the adjacent supercooling plate group 244, so that the plurality of The third convex edge 2443 and the hole walls of multiple third liquid inlet holes 2441 cooperate to form a third liquid inlet channel 241 separated from the third heat exchange channel 243, and the hole walls of the third liquid storage hole 2442 are surrounded to form a third liquid storage channel 242. Since there is no convex edge structure around the edge of the third liquid storage hole 2442, the third liquid storage channel 242 is connected to the third heat exchange channel 243, so that the refrigerant in the third liquid storage channel 242 can enter the third heat exchange channel 243 to flow and exchange heat, and then be discharged from the plate heat exchanger from the first liquid outlet pipe 120.

[0069] In some embodiments, the edge of the first end of the third liquid inlet hole 2441 is provided with a third flange 2443, and the edge of the second end of the third liquid inlet hole 2441 is flat (i.e., the third flange 2443 is not provided). After the multiple supercooling plate groups 244 are stacked in sequence, the third flange 2443 of one supercooling plate group 244 is connected to the edge of the third liquid inlet hole 2441 of another adjacent supercooling plate group 244, so that the multiple third flanges 2443 and the hole walls of the multiple third liquid inlet holes 2441 cooperate to form a third liquid inlet channel 241 separated from the third heat exchange channel 243. In other embodiments, the edges of both ends of the third liquid inlet hole 2441 may be provided with a third flange 2443. After the multiple supercooling plate groups 244 are stacked in sequence, the third flange 2443 of one supercooling plate group 244 is connected to the third flange 2443 of another adjacent supercooling plate group 244, so that the multiple third flanges 2443 and the hole walls of the multiple third liquid inlet holes 2441 cooperate to form a third liquid inlet channel 241 separated from the third heat exchange channel 243.

[0070] In some embodiments, as shown in Figures 12 to 14, the plate heat exchanger further includes a third reversing plate 271, which is sandwiched between the subcooling unit 240 and the first heat exchange unit 220. The setting of the third reversing plate 271 can serve as a barrier for the refrigerant in the first heat exchange unit 220 and the subcooling unit 240, and can also serve as a connection between the second liquid storage channel 224 and the third liquid storage channel 242. The structure of the third reversing plate 271 is exactly the same as that of the second reversing plate 261, and will not be repeated here.

[0071] In some embodiments, as shown in Figures 12 to 14, the plate heat exchanger further includes a drying element 310 and a filtering element 320. The drying element 310 is disposed in the first liquid storage channel 213 and the second liquid storage channel 224, and the filtering element 320 is disposed in the third liquid storage channel 242 to achieve drying and filtering effects on the refrigerant.

[0072] As shown in Figures 12 to 14, the plate heat exchanger provided in this embodiment is provided with a supercooling unit 240, a first heat exchange unit 220 and a heat exchange drainage unit 210, wherein the first heat exchange unit 220 is located between the supercooling unit 240 and the heat exchange drainage unit 210, the first liquid inlet pipe 110, the third liquid inlet channel 241, the second liquid inlet channel 221, the second heat exchange flow channel 222, the second liquid outlet channel 223, the first liquid inlet channel 211, the first heat exchange flow channel 212, the first liquid storage channel 213, the second liquid storage channel 224, the third liquid storage channel 242, the third heat exchange flow channel 243 and the first liquid outlet pipe 120 are connected in sequence, and the third liquid inlet channel 241 and the third heat exchange flow channel 243 are separated from each other, and the second liquid storage channel 224 and the second heat exchange flow channel 222 are separated from each other, so that the refrigerant can pass through the first The liquid inlet pipe 110, the third liquid inlet channel 241 and the second liquid inlet channel 221 enter the second heat exchange channel 222 for heat exchange, bypass the second liquid storage channel 224 in the second heat exchange channel 222, and then enter the first heat exchange channel 212 through the second liquid outlet channel 223 and the first liquid inlet channel 211 for heat exchange, and then enter the first liquid storage channel 213, the second liquid storage channel 224 and the third liquid storage channel 242 in sequence from the first heat exchange channel 212. The drying element 310 in the first liquid storage channel 213 and the second liquid storage channel 224 dries the refrigerant, and the filter element 320 in the third liquid storage channel 242 filters the refrigerant. The refrigerant then enters the third heat exchange channel 243 from the third liquid storage channel 242 for supercooling heat exchange, and then enters the first liquid outlet pipe 120 from the third heat exchange channel 243 to be discharged from the plate heat exchanger.

[0073] As can be seen, the plate heat exchanger provided in this embodiment integrates the liquid storage channel, drying element 310, and filter element 320 within the heat exchange structure 200. This allows the plate heat exchanger to perform not only heat exchange but also liquid storage, drying, and filtering functions. This significantly reduces the footprint of the heat exchange system and eliminates the need for piping connections between the plate heat exchanger, liquid storage, filter, and dryer, simplifying assembly and addressing leakage issues caused by seal failure at pipe interfaces. Furthermore, after drying and filtering, the refrigerant enters the third heat exchange channel 243 for further heat exchange, achieving subcooling.

[0074] For a heat exchange system with a smaller heat exchange requirement, the first heat exchange unit 220 can be omitted, or the first heat exchange unit 220 and the supercooling unit 240 can be omitted. In this case, at least one of the drying element 310 and the filter element 320 can be set in the first liquid storage channel 213, depending on the usage requirements, and they are not listed here one by one.

Claims

1. A plate heat exchanger, comprising a first liquid inlet pipe (110), a first liquid outlet pipe (120), and a heat exchange drainage unit (210), wherein the heat exchange drainage unit (210) comprises a first liquid inlet channel (211), a first heat exchange flow channel (212), and a first liquid storage channel (213) which are connected in sequence, wherein the first liquid inlet channel (211) is connected to the first liquid inlet pipe (110), and the first liquid storage channel (213) is connected to the first liquid outlet pipe (120).

2. The plate heat exchanger according to claim 1, wherein: The heat exchange and drainage unit (210) comprises a plurality of heat exchange and drainage plate groups (214) arranged in a sequentially spaced and stacked manner, wherein the first heat exchange flow channel (212) is formed between two adjacent heat exchange and drainage plate groups (214), and the heat exchange and drainage plate groups (214) are provided with a first liquid inlet hole (2141) and a first liquid storage hole (2142), wherein the hole wall of the first liquid inlet hole (2141) is surrounded to form the first liquid inlet channel (211), and the edge of the first liquid storage hole (2142) is surrounded by a first convex edge (2143), and each of the The first convex edges (2143) of the heat exchange guide plate group (214) are all connected to the edges of the first liquid storage holes (2142) of the adjacent heat exchange guide plate group (214), so that the hole walls of multiple first convex edges (2143) and multiple first liquid storage holes (2142) cooperate to form the first liquid storage channel (213), and the first convex edge (2143) is provided with an opening (2144), and the first heat exchange flow channel (212) is connected to the first liquid storage channel (213) through the opening (2144).

3. The plate heat exchanger according to claim 2, wherein: The opening (2144) is located on a side of the first convex edge (2143) facing away from the first liquid inlet hole (2141).

4. The plate heat exchanger according to any one of claims 1 to 3, further comprising a first heat exchange unit (220), the first heat exchange unit (220) comprising a second liquid inlet channel (221), a second heat exchange channel (222) and a second liquid outlet channel (223) connected in sequence, the second liquid inlet channel (221) being connected to the first liquid inlet pipe (110), and the second liquid outlet channel (223) being connected to the first liquid inlet channel (211).

5. The plate heat exchanger according to claim 4, wherein: The first heat exchange unit (220) further includes a second liquid storage channel (224), and the first liquid storage channel (213) is connected to the first liquid outlet pipe (120) through the second liquid storage channel (224).

6. The plate heat exchanger according to claim 5, wherein: The first heat exchange unit (220) comprises a plurality of first heat exchange plate groups (225) sequentially stacked and spaced apart, wherein the second heat exchange channel (222) is formed between two adjacent first heat exchange plate groups (225), the first heat exchange plate group (225) is provided with a second liquid inlet hole (2251), a second liquid outlet hole (2252) and a second liquid storage hole (2253), the hole wall of the second liquid inlet hole (2251) is surrounded to form the second liquid inlet channel (221), the second liquid outlet hole (225 2) is surrounded by the hole wall to form the second liquid outlet channel (223), the edge of the second liquid storage hole (2253) is surrounded by a second convex edge (2254), and the second convex edge (2254) of each first heat exchange plate group (225) is connected to the edge of the second liquid storage hole (2253) of the adjacent first heat exchange plate group (225), so that multiple second convex edges (2254) and the inner walls of multiple second liquid storage holes (2253) cooperate to form the second liquid storage channel (224).

7. The plate heat exchanger according to claim 4, further comprising a first reversing plate (231), the first reversing plate (231) being sandwiched between the first heat exchange unit (220) and the heat exchange and drainage unit (210), the first reversing plate (231) being provided with a first through hole (2311), and the second liquid outlet channel (223) being connected to the first liquid inlet channel (211) through the first through hole (2311).

8. The plate heat exchanger according to any one of claims 1 to 3, further comprising a supercooling unit (240), the supercooling unit (240) comprising a third liquid inlet channel (241), a third liquid storage channel (242) and a third heat exchange channel (243), the third liquid inlet channel (241) being separated from the third heat exchange channel (243), and the first liquid inlet channel (211) being connected to the first liquid inlet pipe (110) through the third liquid inlet channel (241), the first liquid storage channel (213), the third liquid storage channel (242), the third heat exchange channel (243) and the first liquid outlet pipe (120) being connected in sequence.

9. The plate heat exchanger according to claim 8, wherein: The supercooling unit (240) includes a plurality of supercooling plate groups (244) that are stacked in sequence at intervals, and the third heat exchange channel (243) is formed between two adjacent supercooling plate groups (244). The supercooling plate group (244) is provided with a third liquid inlet hole (2441) and a third liquid storage hole (2442). The edge of the third liquid inlet hole (2441) is surrounded by a third convex edge (2443). The third convex edge (2443) of each supercooling plate group (244) is connected to the edge of the third liquid inlet hole (2441) of the adjacent supercooling plate group (244), so that the hole walls of the plurality of third convex edges (2443) and the plurality of third liquid inlet holes (2441) cooperate to form the third liquid inlet channel (241), and the hole walls of the third liquid storage hole (2442) are surrounded to form the third liquid storage channel (242).

10. The plate heat exchanger according to any one of claims 1 to 3, wherein: At least one of a drying element (310) and a filtering element (320) is provided in the first liquid storage channel (213).

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