Plate heat exchanger

Abstract

The utility model provides a plate heat exchanger, and belongs to the technical field of heat exchangers. The plate heat exchanger comprises a heat exchange plate bundle, the heat exchange plate bundle comprises a plurality of circulation channels, each circulation channel is divided into a water side channel used for water passing and a refrigerant channel used for refrigerant passing, and the water side channels and the refrigerant channels are alternately arranged; the heat exchange plate bundle is provided with at least one first liquid inlet and outlet corner hole structure communicating with an inlet of the refrigerant channel and at least one second liquid inlet and outlet corner hole structure communicating with an outlet of the refrigerant channel. An inflow structure and an outflow structure. The utility model has the advantages that when the evaporator is used as an evaporator, the refrigerant shunting quantity is large, the flow path is short, and when the condenser is used as a condenser, the refrigerant shunting quantity is small, and the flow path is long.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchangers, in particular to a plate type heat exchanger. Background Art

[0002] The dual heat pump air conditioning unit generally consists of a compressor, an evaporator, a throttling device, and a condenser to form a refrigerant circulation loop. When the air conditioner is in cooling mode, the plate heat exchanger acts as an evaporator to provide cold water; when the air conditioner is in heating mode, the plate heat exchanger acts as a condenser to provide hot water.

[0003] When used as an evaporator, liquid refrigerant enters and evaporates inside the plate heat exchanger, changing from liquid to gas, and gaseous refrigerant exits

[0004] When used as a condenser, gaseous refrigerant enters, condenses inside the Korean heat exchanger, changes from gas to liquid, and liquid refrigerant exits.

[0005] The changes in the refrigerant state during evaporation and condensation are different, resulting in different structures required for evaporation and condensation to reach the optimal efficiency point. When the plate heat exchanger is used as an evaporator during cooling, it requires a large number of flow channels and a short flow channel length. When the plate heat exchanger is used as a condenser during heating, it requires a small number of flow channels and a long flow channel length.

[0006] The optimal number of branches of the evaporator is generally greater than that of the condenser, but the cooling and heating flow splitting of the traditional plate heat exchanger is not variable and cannot accommodate the different requirements for the optimal flow path for evaporation and condensation.

[0007] The pipes of the copper tube aluminum fin heat exchanger are outside the heat exchanger, and the design difficulty of the pipes and structures is relatively low. However, the plate heat exchanger is brazed as a whole, and it is more difficult to complete the flow channel design inside. Therefore, when used as an evaporator or condenser in the industry, a relatively simple flow channel design is still used. Summary of the invention

[0008] The utility model aims to solve the above problems in the prior art and proposes a plate heat exchanger which has the advantages of a large number of refrigerant diversions and a short process when used as an evaporator, and a small number of refrigerant diversions and a long process when used as a condenser.

[0009] The purpose of the utility model can be achieved through the following technical solutions:

[0010] A plate heat exchanger, comprising:

[0011] A heat exchange plate bundle, wherein the heat exchange plate bundle comprises a plurality of flow channels, wherein the flow channels are divided into a water side channel for passing water and a refrigerant channel for passing refrigerant, and the water side channel and the refrigerant channel are arranged alternately, and the heat exchange plate bundle has at least one first inlet and outlet liquid angle hole structure communicating with the inlet of the refrigerant channel and at least one second inlet and outlet liquid angle hole structure communicating with the outlet of the refrigerant channel;

[0012] an inflow structure, wherein the inflow structure is at least partially arranged in the first inlet and outlet angle hole structure, the inflow structure has a first channel and a second channel, a first through hole corresponding to the position of the refrigerant channel is opened between the first channel and the second channel, and a second through hole corresponding to and connected to the inlet of the refrigerant channel is opened on the inflow structure; a first partition is fixed in the second channel on the circulation channels corresponding to the (6N+1)th and (6N+5)th; a first one-way valve is installed at the position of the first through hole on the circulation channels corresponding to the (6N+2)th and (6N+4)th, and the first one-way valve is opened when the refrigerant can flow from the first channel to the fourth channel;

[0013] An outflow structure, wherein the outflow structure is at least partially arranged at the second inlet and outlet angle hole structure, the outflow structure has a third channel and a fourth channel, a first through hole corresponding to the position of the refrigerant channel is opened between the third channel and the fourth channel, and a second through hole corresponding to and connected to the outlet of the refrigerant channel is opened on the outflow structure; on the circulation channels corresponding to the (6N+1)th and (6N+3)th, a second partition is fixed in the third channel; a second one-way valve is installed at the position of the fourth through hole on the circulation channels corresponding to the (6N+4)th and (6N+6)th, and the second one-way valve is opened when the refrigerant can flow from the first channel to the fourth channel;

[0014] Wherein, N is a natural number.

[0015] In the above plate heat exchanger, the first one-way valve and the second one-way valve are gravity one-way valves or spring-loaded one-way valves, the first one-way valve is installed in the first channel, and the second one-way valve is installed in the third channel.

[0016] In the above plate heat exchanger, the inflow structure includes a first tube body, the first channel, the second channel, the first through hole, and the second through hole are integrated on the first tube body, and the first tube body is detachably installed at the first liquid inlet and outlet angle hole structure.

[0017] In the above plate heat exchanger, the outflow structure includes a second tube body, the third channel, the fourth channel, the third through hole, and the fourth through hole are integrated on the second tube body, and the second tube body is detachably installed at the second inlet and outlet liquid angle hole structure.

[0018] A plate heat exchanger, comprising:

[0019] A heat exchange plate bundle, wherein the heat exchange plate bundle comprises a plurality of flow channels, wherein the flow channels are divided into a water side channel for passing water and a refrigerant channel for passing refrigerant, and the water side channel and the refrigerant channel are arranged alternately, and the heat exchange plate bundle has at least one first inlet and outlet liquid angle hole structure communicating with the inlet of the refrigerant channel and at least one second inlet and outlet liquid angle hole structure communicating with the outlet of the refrigerant channel;

[0020] an inflow structure, wherein the inflow structure is at least partially arranged in the first inlet and outlet angle hole structure, the inflow structure has a first channel and a second channel, a first through hole corresponding to the position of the refrigerant channel is opened between the first channel and the second channel, and a second through hole corresponding to and connected to the inlet of the refrigerant channel is opened on the inflow structure; a first partition is fixed in the second channel on the circulation channels corresponding to the (6N+1)th and (6N+5)th; a first one-way valve is installed at the position of the first through hole on the circulation channels corresponding to the (6N+2)th and (6N+4)th, and the first one-way valve is opened when the refrigerant can flow from the fourth channel to the first channel;

[0021] An outflow structure, wherein the outflow structure is at least partially arranged at the second inlet and outlet liquid angle hole structure, the outflow structure has a third channel and a fourth channel, a first through hole corresponding to the position of the refrigerant channel is opened between the third channel and the fourth channel, and a second through hole corresponding to and connected to the outlet of the refrigerant channel is opened on the outflow structure; on the circulation channels corresponding to the (6N+1)th and (6N+3)th, a second partition is fixed in the third channel; a second one-way valve is installed at the position of the fourth through hole on the circulation channels corresponding to the (6N+4)th and (6N+6)th, and the second one-way valve is opened when the refrigerant can flow from the fourth channel to the first channel;

[0022] Wherein, N is a natural number.

[0023] In the above plate heat exchanger, the first one-way valve is a gravity one-way valve or a spring one-way valve, which is installed in the second channel, and the second one-way valve is a sliding guide valve, which is installed in the fourth channel.

[0024] In the above plate heat exchanger, the inflow structure includes a first tube body, the first channel, the second channel, the first through hole, and the second through hole are integrated on the first tube body, and the first tube body is detachably installed at the first liquid inlet and outlet angle hole structure.

[0025] In the above plate heat exchanger, the outflow structure includes a second tube body, the third channel, the fourth channel, the third through hole, and the fourth through hole are integrated on the second tube body, and the second tube body is detachably installed at the second inlet and outlet liquid angle hole structure.

[0026] In the above-mentioned plate heat exchanger, the sliding guide valve includes a cylinder, the cylinder has a flow channel, the cylinder is provided with an exchange hole connected to the flow channel, and the exchange hole is connected to the fourth through hole; the flow channel is provided with a first limiting portion and a second limiting portion, a slider is slidably arranged in the flow channel, the slider is connected to the first limiting portion through a compression spring, the slider is provided with a through hole and a recessed platform arranged around the through hole, the recessed platform is located on the side away from the compression spring, the slider can move between a first position and a second position, when in the first position, the exchange hole is connected to the flow channel; when in the second position, the slider closes the exchange hole.

[0027] Compared with the prior art, this application has the following advantages:

[0028] The present application can control the length of the refrigerant flow path according to actual needs. When making an evaporator, the number of refrigerant diversions is large and the flow path is short. When making a condenser, the number of refrigerant diversions is small and the flow path is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the structure of the first embodiment in which a spring-loaded one-way valve is installed and refrigerant flows into the fourth channel;

[0030] Figure 2 is a schematic diagram of the structure of the first embodiment in which a spring-loaded one-way valve is installed and refrigerant flows into the first passage;

[0031] Figure 3 is a schematic diagram of the structure in which a gravity check valve is installed in the first embodiment and refrigerant flows into the fourth channel;

[0032] Figure 4 is a schematic diagram of the structure in which a gravity check valve is installed in the first embodiment and refrigerant flows into the first channel;

[0033] Figure 5 is a schematic structural diagram of the refrigerant flowing into the fourth channel in the second embodiment;

[0034] Figure 6 is a schematic structural diagram of the refrigerant flowing into the first channel in the second embodiment;

[0035] Figure 7 A three-dimensional structural diagram of the plate heat exchanger in this application;

[0036] Figure 8 It is a cross-sectional view of the sliding guide valve in this application.

[0037] In the figure,

[0038] 2. Heat exchange plate bundle; 211. Water side channel; 212. Refrigerant channel; 22. First liquid inlet and outlet angle hole structure; 23. Second liquid inlet and outlet angle hole structure;

[0039] 3. Inflow structure; 31. First channel; 32. Second channel; 33. First through hole; 34. Second through hole; 35. First partition; 36. First one-way valve;

[0040] 4. Outflow structure; 41. Third channel; 42. Fourth channel; 43. Third through hole; 44. Fourth through hole; 45. Second partition; 46. Second one-way valve.

[0041] 461, sliding guide valve; 4611, cylinder; 46111, flow channel; 46112, communication hole; 4612, first limiting portion; 4613, second limiting portion; 4614, slider; 46141, perforation; 46142, recess; 4615, compression spring. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Figures 1 to 6 The arrows in the figure are schematic arrows indicating the direction of refrigerant flow.

[0044] like Figures 1 to 4As shown, a plate heat exchanger comprises: a heat exchange plate bundle 2, an inflow structure 3, and an outflow structure 4. The heat exchange plate bundle 2 comprises a plurality of flow channels, wherein the flow channels are divided into a water side channel 211 for passing water and a refrigerant channel 212 for passing refrigerant, and the water side channel 211 and the refrigerant channel 212 are alternately arranged. The heat exchange plate bundle 2 has at least one first inlet and outlet liquid angle hole structure 22 connected to the inlet of the refrigerant channel 212 and at least one second inlet and outlet liquid angle hole structure 22 connected to the outlet of the refrigerant channel 212. The inflow structure 3 is at least partially arranged in the first inlet and outlet angle hole structure 22, and the inflow structure 3 has a first channel 31 and a second channel 32. A first through hole 33 corresponding to the position of the refrigerant channel 212 is opened between the first channel 31 and the second channel 32, and a second through hole 34 corresponding to and connected to the inlet of the refrigerant channel 212 is opened on the inflow structure 3; on the circulation channels corresponding to the (6N+1)th and (6N+5)th, a first partition is fixed in the second channel 32. The plate 35; a first check valve 36 is installed at the position of the first through hole 33 on the flow channel corresponding to the (6N+2) and (6N+4), and the first check valve 36 is opened when the refrigerant can flow from the first channel 31 to the fourth channel 42; the outflow structure 4 is at least partially arranged at the second inlet and outlet angle hole structure 23, and the outflow structure 4 has a third channel 41 and a fourth channel 42, and a first through hole 33 corresponding to the position of the refrigerant channel 212 is opened between the third channel 41 and the fourth channel 42, and the flow The outlet structure 4 is provided with a second through hole 34 which corresponds to and communicates with the outlet of the refrigerant channel 212 one by one; a second partition plate 45 is fixed in the third channel 41 on the circulation channels corresponding to the (6N+1)th and (6N+3)th; a second one-way valve 46 is installed at the position of the fourth through hole 44 on the circulation channels corresponding to the (6N+4)th and (6N+6)th. When the refrigerant can flow from the first channel 31 to the fourth channel 42, the second one-way valve 46 is opened; wherein N is a natural number. Natural numbers are 0, 1, 2, 3, 4...n.

[0045] In this application,

[0046] When used as an evaporator for cooling, liquid refrigerant enters from the fourth channel 42, and then enters the third channel 41 from the fourth channel 42 through the fourth through hole 44. Under the pressure of the liquid refrigerant, the second one-way valve 46 in the third channel 41 is opened, and the refrigerant enters the third channel 41, and then enters the refrigerant channel 212 through the third through hole 43 to exchange heat with the liquid in the water side channel 211. The refrigerant that has completed the heat exchange enters the second channel 32 through the second through hole 34, and then enters the first channel 31 through the first through hole 33. The first one-way valve 36 in the first channel 31 opens under the pressure of the liquid refrigerant. The gaseous refrigerant merges in the first channel 31 and leaves the plate heat exchanger. In this case, the number of refrigerant flow channels 46111 is consistent with that of a conventional plate heat exchanger. In the figure, the number of refrigerant flow channels 46111 is 6.

[0047] When used as a condenser, the gaseous refrigerant enters from the first channel 31. The gaseous refrigerant is high temperature and high pressure. The gaseous refrigerant pressure at the inlet is the highest pressure in the entire plate heat exchanger. As the refrigerant flows inside the plate heat exchanger, the refrigerant pressure gradually decreases. Therefore, the first check valve 36 of the first channel 31 is closed under the action of the spring and the pressure difference between the refrigerants in the first channel 31 and the second channel 32. The gaseous refrigerant enters the second channel 32 through the first through hole 33 without a check valve. After entering the second channel 32, under the action of the fixed baffle, it enters the refrigerant channel 212 through the second through hole 34 to exchange heat with the water-side liquid. When the refrigerant enters the third channel 41 through the third through hole 43, the second one-way valve 46 arranged in the third through hole 43 is closed under the action of the spring and the pressure difference between the refrigerants in the third channel 41 and the fourth channel 42, so that the one-way valve in the third channel 41 is closed, and the refrigerant cannot enter the fourth channel 42 through the third through hole 43 and enter the refrigerant channel 212 again. When the refrigerant returns to the second channel 32 again, since the one-way valve of the first channel 31 is closed, the refrigerant enters the refrigerant channel 212 again, so that the multiple refrigerant channels 212 are combined into one refrigerant channel 212. After the refrigerant completes heat exchange, it enters the fourth channel 42 through the fourth through hole 44 in the third channel 41 where the second one-way valve 46 is not arranged, completes confluence in the fourth channel 42, and leaves the plate heat exchanger.

[0048] In this case, the number of refrigerant flow channels 46111 changes due to the effects of various structures. In the figure, the data of the refrigerant flow channel 46111 is 2.

[0049] In this application, the flow channels are counted from right to left, and the first flow channel on the right is counted as 1.

[0050] In this embodiment, on the circulation channels corresponding to the 1st, 7th, 13th and 5th, 11th, a first partition plate 35 is fixed in the second channel 32; on the circulation channels corresponding to the 2nd, 8th and 4th, 10th, a first one-way valve 36 is installed at the position of the first through hole 33; on the circulation channels corresponding to the 1st, 7th, 13th and 3rd, 9th, a second partition plate 45 is fixed in the third channel 41; and on the circulation channels corresponding to the 4th, 10th and 6th, 12th, a second one-way valve 46 is installed at the position of the fourth through hole 44.

[0051] In the present application, 13 circulation channels are provided which are formed by 14 plates. In the actual manufacturing process, plates can also be added to form more circulation channels, and each increase is in multiples of 6, for example, 19 circulation channels and 25 circulation channels.

[0052] The present application can control the length of the refrigerant flow channel 46111 according to actual needs. When used as an evaporator, the number of refrigerant diversions is large and the flow is short. When used as a condenser, the number of refrigerant diversions is small and the flow is long.

[0053] Specifically, the first one-way valve 36 and the second one-way valve 46 are gravity one-way valves or spring-loaded one-way valves. The first one-way valve 36 is installed in the first passage 31 , and the second one-way valve 46 is installed in the third passage 41 .

[0054] Specifically, Figure 7 As shown, the inflow structure 3 includes a first tube body, a first channel 31, a second channel 32, a first through hole 33, and a second through hole 34 are integrated on the first tube body, and the first tube body is detachably installed at the first inlet and outlet angle hole structure 22. This design can make ordinary plate heat exchangers usable.

[0055] Specifically, Figure 7 As shown, the outflow structure 4 includes a second tube body, a third channel 41, a fourth channel 42, a third through hole 43, and a fourth through hole 44 are integrated on the second tube body, and the second tube body is detachably installed at the second inlet and outlet angle hole structure 23. This design can make ordinary plate heat exchangers usable.

[0056] like Figures 5 and 6As shown, a plate heat exchanger comprises: a heat exchange plate bundle 2, an inflow structure 3 and an outflow structure 4, the heat exchange plate bundle 2 comprises a plurality of flow channels, wherein the flow channels are divided into a water side channel 211 for passing water and a refrigerant channel 212 for passing refrigerant, and the water side channel 211 and the refrigerant channel 212 are arranged alternately, and the heat exchange plate bundle 2 has at least one first inlet and outlet liquid angle hole structure 22 connected to the inlet of the refrigerant channel 212 and at least one second inlet and outlet liquid angle hole structure 22 connected to the outlet of the refrigerant channel 212. The inflow structure 3 is at least partially arranged in the first inlet and outlet angle hole structure 22, and the inflow structure 3 has a first channel 31 and a second channel 32. A first through hole 33 corresponding to the position of the refrigerant channel 212 is opened between the first channel 31 and the second channel 32, and a second through hole 34 corresponding to and connected to the inlet of the refrigerant channel 212 is opened on the inflow structure 3; on the circulation channels corresponding to the (6N+1)th and (6N+5)th, a first partition is fixed in the second channel 32. The plate 35; a first check valve 36 is installed at the position of the first through hole 33 on the flow channel corresponding to the (6N+2) and (6N+4), and the first check valve 36 is opened when the refrigerant can flow from the fourth channel 42 to the first channel 31; the outflow structure 4 is at least partially arranged at the second inlet and outlet angle hole structure 23, and the outflow structure 4 has a third channel 41 and a fourth channel 42, and a first through hole 33 corresponding to the position of the refrigerant channel 212 is opened between the third channel 41 and the fourth channel 42, and the flow A second through hole 34 is provided on the outlet structure 4, which corresponds one-to-one to and is connected to the outlet of the refrigerant channel 212; a second partition plate 45 is fixed in the third channel 41 on the circulation channels corresponding to the (6N+1)th and (6N+3)th circulation channels; a second one-way valve 46 is installed at the position of the fourth through hole 44 on the circulation channels corresponding to the (6N+4)th and (6N+6)th circulation channels, and the second one-way valve 46 opens when the refrigerant can flow from the fourth channel 42 to the first channel 31; wherein N is a natural number.

[0057] In this application,

[0058] In the first solution, the liquid refrigerant enters from the fourth channel 42, and enters the third channel 41 from the fourth channel 42 through the fourth through hole 44. Under the pressure of the liquid refrigerant, the second one-way valve 46 is closed, closing the corresponding fourth through hole 44, and the refrigerant enters the third channel 41 from the unclosed fourth through hole 44, and then enters the refrigerant channel 212 through the third through hole 43 to exchange heat with the liquid in the water side channel 211. Under the pressure, the first one-way valve 36 is closed, and the refrigerant repeatedly flows into the refrigerant channel 212 for heat exchange until the flow channel 46111 does not have the first through hole 33 closed by the first one-way valve 36, and flows into the first channel 31, and finally merges in the first channel 31 and leaves the plate heat exchanger. In this case, the number of refrigerant flow channels 46111 changes under the action of various structures. In the figure, the data of the refrigerant flow channel 46111 is 2.

[0059] In the second scheme, the gaseous refrigerant enters from the first channel 31. The gaseous refrigerant is high temperature and high pressure. The pressure of the gaseous refrigerant at the entrance is the highest pressure in the entire plate heat exchanger. As the refrigerant flows inside the plate heat exchanger, the refrigerant pressure gradually decreases. Therefore, the first one-way valve 36 of the first channel 31 is opened under the action of the spring and the pressure difference between the refrigerants in the first channel 31 and the second channel 32. The gaseous refrigerant enters the second channel 32 through the first through hole 33. Then it enters the refrigerant channel 212 through the second through hole 34 to exchange heat with the water-side liquid. The second one-way valve 46 is opened under the action of pressure. The gaseous refrigerant directly enters the third flow channel 46111 from the third through hole 43, and then flows into the fourth channel 42 from the fourth through hole 44. Finally, it completes the confluence in the fourth channel 42 and leaves the plate heat exchanger.

[0060] In this case, the number of refrigerant flow channels 46111 changes due to the effects of various structures. In the figure, the data of the refrigerant flow channel 46111 is 2.

[0061] In this embodiment, on the circulation channels corresponding to the 1st, 7th, 13th and 5th, 11th, a first partition plate 35 is fixed in the second channel 32; on the circulation channels corresponding to the 2nd, 8th and 4th, 10th, a first one-way valve 36 is installed at the position of the first through hole 33; on the circulation channels corresponding to the 1st, 7th, 13th and 3rd, 9th, a second partition plate 45 is fixed in the third channel 41; and on the circulation channels corresponding to the 4th, 10th and 6th, 12th, a second one-way valve 46 is installed at the position of the fourth through hole 44.

[0062] Specifically, the first one-way valve 36 is a gravity one-way valve or a spring one-way valve installed in the second passage 32 , and the second one-way valve 46 is a sliding one-way valve installed in the fourth passage 42 .

[0063] Specifically, Figure 7 As shown, the inflow structure 3 includes a first tube body, a first channel 31, a second channel 32, a first through hole 33, and a second through hole 34 are integrated on the first tube body, and the first tube body is detachably installed at the first inlet and outlet angle hole structure 22. This design can make ordinary plate heat exchangers usable.

[0064] Specifically, Figure 7 As shown, the outflow structure 4 includes a second tube body, a third channel 41, a fourth channel 42, a third through hole 43, and a fourth through hole 44 are integrated on the second tube body, and the second tube body is detachably installed at the second inlet and outlet angle hole structure 23. This design can make ordinary plate heat exchangers usable.

[0065] Specifically, Figure 8 As shown, the sliding guide valve 461 includes a cylinder 4611, the cylinder 4611 has a flow channel 46111, the cylinder 4611 is provided with an exchange hole 46112 connected to the flow channel 46111, and the exchange hole 46112 is connected to the fourth through hole 44; the flow channel 46111 has a first limit portion 4612 and a second limit portion 4613, and a slider 4614 is slidably arranged in the flow channel 46111, the slider 4614 is connected to the first limit portion 4612 through a compression spring 4615, the slider 4614 is provided with a through hole 46141 and a recessed platform 46142 arranged around the through hole 46141, the recessed platform 46142 is located on the side away from the compression spring 4615, and the slider 4614 can move between a first position and a second position. When in the first position, the exchange hole 46112 is connected to the flow channel 46111; when in the second position, the slider 4614 closes the exchange hole 46112.

[0066] When the refrigerant is introduced into the fourth flow channel 46111, the pressure of the liquid refrigerant squeezes the slider 4614 and moves the slider 4614 to the first position, so that the slider 4614 moves and closes the AC hole 46112. If the flow flows from the third flow channel 46111 to the fourth flow channel 46111, under the action of the compression spring 4615 and the pressure of the refrigerant, the slider 4614 moves to the first position and opens the AC hole 46112.

[0067] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative position relationship and movement status of the components in a certain specific posture, as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0068] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. At the same time, the meaning of "and / or" appearing in the full text is that it includes three schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0069] The above components are all common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0070] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A plate heat exchanger, characterized in that: include: A heat exchange plate bundle (2), the heat exchange plate bundle (2) comprising a plurality of circulation channels, wherein the circulation channels are divided into a water side channel (211) for passing water and a refrigerant channel (212) for passing refrigerant, and the water side channel (211) and the refrigerant channel (212) are arranged alternately, and the heat exchange plate bundle (2) has at least one first liquid inlet and outlet angle hole structure (22) communicating with the inlet of the refrigerant channel (212) and at least one second liquid inlet and outlet angle hole structure (23) communicating with the outlet of the refrigerant channel (212); An inflow structure (3), wherein the inflow structure (3) is at least partially arranged in the first inlet and outlet angle hole structure (22), the inflow structure (3) comprises a first channel (31) and a second channel (32), a first through hole (33) corresponding one-to-one to the position of the refrigerant channel (212) is provided between the first channel (31) and the second channel (32), and a second through hole (34) corresponding one-to-one to and connected to the inlet of the refrigerant channel (212) is provided on the inflow structure (3); a first partition plate (35) is fixed in the second channel (32) on the circulation channels corresponding to the (6N+1)th and (6N+5)th circulation channels; a first one-way valve (36) is installed at the position of the first through hole (33) on the circulation channels corresponding to the (6N+2)th and (6N+4)th circulation channels, and the first one-way valve (36) is opened when the refrigerant can flow from the first channel (31) to the fourth channel (42); An outflow structure (4), wherein the outflow structure (4) is at least partially arranged at the second liquid inlet and outlet angle hole structure (23), the outflow structure (4) having a third channel (41) and a fourth channel (42), a first through hole (33) corresponding to the position of the refrigerant channel (212) being provided between the third channel (41) and the fourth channel (42), and a second through hole (34) corresponding to and connected to the outlet of the refrigerant channel (212) being provided on the outflow structure (4); a second partition plate (45) is fixed in the third channel (41) on the circulation channels corresponding to the (6N+1)th and (6N+3)th circulation channels; a second one-way valve (46) is installed at the position of the fourth through hole (44) on the circulation channels corresponding to the (6N+4)th and (6N+6)th circulation channels, and the second one-way valve (46) is opened when the refrigerant can flow from the first channel (31) to the fourth channel (42); Wherein, N is a natural number.

2. The plate heat exchanger according to claim 1, characterized in that: The first one-way valve (36) and the second one-way valve (46) are gravity one-way valves or spring-loaded one-way valves; the first one-way valve (36) is installed in the first channel (31), and the second one-way valve (46) is installed in the third channel (41).

3. The plate heat exchanger according to claim 1, characterized in that: The inflow structure (3) comprises a first tube body, the first channel (31), the second channel (32), the first through hole (33), and the second through hole (34) are integrated on the first tube body, and the first tube body is detachably mounted at the first liquid inlet and outlet angle hole structure (22).

4. The plate heat exchanger according to claim 1, characterized in that: The outflow structure (4) comprises a second tube body, the third channel (41), the fourth channel (42), the third through hole (43), and the fourth through hole (44) are integrated on the second tube body, and the second tube body is detachably mounted at the second liquid inlet and outlet angle hole structure (23).

5. A plate heat exchanger, characterized in that: include: A heat exchange plate bundle (2), the heat exchange plate bundle (2) comprising a plurality of circulation channels, wherein the circulation channels are divided into a water side channel (211) for passing water and a refrigerant channel (212) for passing refrigerant, and the water side channel (211) and the refrigerant channel (212) are arranged alternately, and the heat exchange plate bundle (2) has at least one first liquid inlet and outlet angle hole structure (22) communicating with the inlet of the refrigerant channel (212) and at least one second liquid inlet and outlet angle hole structure (23) communicating with the outlet of the refrigerant channel (212); An inflow structure (3), wherein the inflow structure (3) is at least partially arranged in the first inlet and outlet angle hole structure (22), the inflow structure (3) comprises a first channel (31) and a second channel (32), a first through hole (33) corresponding one-to-one to the position of the refrigerant channel (212) is provided between the first channel (31) and the second channel (32), and a second through hole (34) corresponding one-to-one to and connected to the inlet of the refrigerant channel (212) is provided on the inflow structure (3); a first partition plate (35) is fixed in the second channel (32) on the circulation channels corresponding to the (6N+1)th and (6N+5)th circulation channels; a first one-way valve (36) is installed at the position of the first through hole (33) on the circulation channels corresponding to the (6N+2)th and (6N+4)th circulation channels, and the first one-way valve (36) is opened when the refrigerant can flow in the fourth channel (42) toward the first channel (31); An outflow structure (4), wherein the outflow structure (4) is at least partially arranged at the second liquid inlet and outlet angle hole structure (23), the outflow structure (4) having a third channel (41) and a fourth channel (42), a first through hole (33) corresponding to the position of the refrigerant channel (212) being provided between the third channel (41) and the fourth channel (42), and a second through hole (34) corresponding to and connected to the outlet of the refrigerant channel (212) being provided on the outflow structure (4); a second partition plate (45) is fixed in the third channel (41) on the circulation channels corresponding to the (6N+1)th and (6N+3)th circulation channels; a second one-way valve (46) is installed at the position of the fourth through hole (44) on the circulation channels corresponding to the (6N+4)th and (6N+6)th circulation channels, and the second one-way valve (46) is opened when the refrigerant can flow from the fourth channel (42) to the first channel (31); Wherein, N is a natural number.

6. The plate heat exchanger according to claim 5, characterized in that: The first one-way valve (36) is a gravity one-way valve or a spring-loaded one-way valve, and the first one-way valve (36) is installed in the second channel (32). The second one-way valve (46) is a sliding guide valve (461), and the second one-way valve (46) is installed in the fourth channel (42).

7. The plate heat exchanger according to claim 5, characterized in that: The inflow structure (3) comprises a first tube body, the first channel (31), the second channel (32), the first through hole (33), and the second through hole (34) are integrated on the first tube body, and the first tube body is detachably mounted at the first liquid inlet and outlet angle hole structure (22).

8. The plate heat exchanger according to claim 5, characterized in that: The outflow structure (4) comprises a second tube body, the third channel (41), the fourth channel (42), the third through hole (43), and the fourth through hole (44) are integrated on the second tube body, and the second tube body is detachably mounted at the second liquid inlet and outlet angle hole structure (23).

9. The plate heat exchanger according to claim 6, characterized in that: The sliding guide valve (461) comprises a cylinder (4611), the cylinder (4611) having a flow channel (46111), the cylinder (4611) being provided with a communication hole (46112) communicating with the flow channel (46111), the communication hole (46112) being communicated with the fourth through hole (44); the flow channel (46111) having a first limiting portion (4612) and a second limiting portion (4613), the flow channel (46111) having a sliding block (4614) slidably arranged therein, the sliding block (4614) being held in position by a compression spring (46111) 5) is connected to the first limiting portion (4612), the slider (4614) is provided with a through hole (46141) and a recess (46142) arranged around the through hole (46141), the recess (46142) is located on the side away from the compression spring (4615), the slider (4614) can move between a first position and a second position, when in the first position, the communication hole (46112) is connected to the flow channel (46111); when in the second position, the slider (4614) closes the communication hole (46112).

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