Heat exchanger with internal bypass function

Abstract

The invention provides a heat exchanger with an internal bypass function, belongs to the technical field of refrigeration equipment, and solves the problems that in the prior art, in order to meet the low-pressure-drop requirement of high-viscosity fluid, a plate heat exchanger has to increase the number of runners and reduce the flow speed of the fluid; and the heat transfer performance of the plate heat exchanger is greatly abundant, the cost is high, and the size is large. The heat exchanger with the internal bypass function comprises a sealing plate and a bottom plate, multiple layers of heat exchange plates are arranged between the sealing plate and the bottom plate and used for heat exchange between a refrigerant and liquid, a bypass liquid inlet is fixedly formed in the sealing plate, and a bypass liquid outlet matched with the bypass liquid inlet is fixedly formed in the bottom plate. And a plurality of closed flow channels are formed between the adjacent heat exchange plates through the convex structures and the concave structures. The method has the advantage that the cost of the plate heat exchanger can be reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of refrigeration equipment, and relates to a heat exchanger, in particular to a heat exchanger with an internal bypass function. Background Art

[0002] With the development of battery energy storage technology, the energy density of battery clusters has gradually increased, posing higher requirements for the thermal management of electrochemical energy storage. In order to meet the requirements of the thermal management of electrochemical energy storage, liquid-cooled temperature control units are currently mainly used to dissipate heat from battery clusters.

[0003] The energy storage liquid-cooled temperature control unit is structurally divided into a compression refrigeration system and a secondary coolant circulation system. The two systems exchange heat between the refrigerant and the secondary coolant liquid through a plate heat exchanger. The inside of the plate heat exchanger is a complex channel formed by front and rear plates, and the fluid flows in a rotating three-dimensional manner in the flow channel. It has the characteristics of small volume and high heat transfer.

[0004] In order to adapt to the complex outdoor environment of electrochemical energy storage, especially the low-temperature use environment, the currently adopted mainstream secondary coolant liquid is 50% ethylene glycol solution. The freezing point of the 50% ethylene glycol solution is 37.9°C, and its viscosity at 20°C is 3.71 mPa·s, while the viscosity of water at 20°C is about 1.0 mPa·s. Compared with water, the 50% ethylene glycol solution has a higher viscosity.

[0005] Based on the heat dissipation characteristics of the electrochemical energy storage battery cluster, most of the energy storage liquid-cooled units adopt the design method of small temperature difference (about 2°C for the inlet and outlet temperature difference) and large flow rate of the secondary coolant liquid. As the refrigeration capacity of a single energy storage liquid-cooled temperature control unit increases, the flow rate of the system secondary coolant liquid also increases accordingly.

[0006] The large-flow and high-viscosity secondary coolant liquid enters the plate heat exchanger and flows in the micro-channels formed by the heat exchange plates. While exchanging heat with the low-temperature refrigerant on the other side, it also consumes fluid energy and generates a large pressure drop. The adjustment of the specification parameters of the secondary coolant circulation pump is relatively inconvenient. The high pressure drop of the plate heat exchanger will increase the cost and volume of the water pump, which is not conducive to the unit design. Designers tend to reduce the pressure drop of the plate heat exchanger.

[0007] For a plate heat exchanger with a fixed plate type, the pressure drop is positively correlated with the flow velocity in the channel. In the existing solutions, reducing the pressure drop on the liquid side of the plate heat exchanger is achieved by increasing the number of plates and increasing the flow channels to reduce the flow velocity in the channel.

[0008] Under the background that energy storage liquid-cooled temperature control units generally adopt a large-flow design, the number of plates (heat transfer area) of the plate heat exchanger in the current industry is basically determined by the pressure drop, greatly exceeding the number of plates required by the heat transfer performance. For the heat exchanger itself, there is performance waste, and at the same time, the cost is high and the volume is large. Summary of the Invention

[0009] The object of the present invention is to address the above problems existing in the prior art and propose a heat exchanger with an internal bypass function. The technical problem to be solved by this heat exchanger with an internal bypass function is: how to achieve rapid heat exchange.

[0010] The object of the present invention can be achieved by the following technical solutions:

[0011] A heat exchanger with an internal bypass function includes a sealing plate 21 and a bottom plate 22. Between the sealing plate 21 and the bottom plate 22, multiple heat exchange plates 9 are provided. Between the multiple heat exchange plates 9, refrigerant and liquid heat exchange is carried out. Inside the sealing plate 21, a bypass liquid inlet 1 is fixedly installed. Inside the bottom plate 22, a bypass liquid outlet 5 that cooperates with the bypass liquid inlet 1 is fixedly installed. Between adjacent heat exchange plates 9, a plurality of closed flow channels 23 are formed through a convex structure and a concave structure. Between the plurality of closed flow channels 23, a heat exchange liquid flow channel 10 for conducting the bypass liquid inlet 1 and the bypass liquid outlet 5 is provided;

[0012] At the upper end of the sealing plate 21, a heat exchange liquid inlet 2 and a refrigerant outlet 3 are fixedly installed. At the lower end of the sealing plate 21, a refrigerant inlet 4 that cooperates with the refrigerant outlet 3 is fixedly installed. At the lower end of the bottom plate 22, a heat exchange liquid outlet 8 that cooperates with the heat exchange liquid inlet 2 is fixedly installed;

[0013] Inside the heat exchange plate 9, a bypass liquid flow channel 11 is provided around the bypass liquid inlet 1. The refrigerant outlet 3 of the closed flow channel 23 is connected to a refrigerant heat exchange channel 6, and the heat exchange liquid inlet 2 is connected to a liquid side heat exchange channel 7;

[0014] The bypass liquid inside the bypass liquid flow channel 11 cannot come into contact with the refrigerant. A flow rate adjustment mechanism is provided between the plurality of closed flow channels 23;

[0015] A bypass liquid commutation mechanism is also provided between the sealing plate 21 and the bottom plate 22.

[0016] The working principle of the present invention: By bypassing a part of the fluid, the determining factor of the plate heat exchanger area changes from pressure drop to heat transfer, which can greatly reduce the cost of the plate heat exchanger. Through the flow rate adjustment mechanism, the flow rate distribution ability changes very little within a certain flow rate range, improving the application range of the product and greatly reducing the adaptation work. By the bypass liquid commutation mechanism, the failure of the bypass flow path flow rate adjustment is prevented, improving the reliability of this structure.

[0017] The flow rate adjustment mechanism includes a plurality of round holes opened inside the bypass liquid flow channel.

[0018] The flow rate adjustment mechanism includes a plurality of openings formed in the sealing plate and the bottom plate. The openings in the sealing plate are communicated with the bypass liquid inlet, and the openings in the bottom plate are communicated with the bypass liquid outlet.

[0019] With the above structure, the flow rate distribution of the heat exchange liquid flow path and the bypass flow path is affected by the pressure drops of the fluid flows in both. The pressure drop of the heat exchange fluid flow path is generated by the flow resistance of the plate heat transfer corrugation structure and the corner hole flow channel, and the pressure drop of the bypass liquid flow path is generated by the flow resistance of the flow rate adjustment structure and the bypass pipeline itself.

[0020] The flow rate adjustment mechanism includes a plurality of adjustment plates arranged between the sealing plate and the bottom plate. A plurality of openings are provided inside each of the adjustment plates. The adjustment plates with different opening forms have different flow rate adjustment capabilities. The plurality of adjustment plates are fixedly installed by the front and rear two layers of heat exchange plates, and different adjustment plates can be matched for heat exchanger products under different heat exchange conditions.

[0021] The flow rate adjustment mechanism includes an adjustment pipe fixedly installed between the sealing plate and the bottom plate, and adjustment packing is installed inside the adjustment pipe.

[0022] With the above structure, the flow rate adjustment structure is the adjustment pipe, and different adjustment packings provide different adjustment capabilities to adapt to different production processes.

[0023] The bypass liquid commutation mechanism includes a bypass liquid commutation flow channel provided on one side of the bottom plate. The upper end of the bypass liquid commutation flow channel is communicated with the bypass liquid inlet and the heat exchange liquid inlet. The lower end of the bypass liquid commutation flow channel is connected with a coolant liquid outlet, and a coolant liquid inlet is fixedly installed at the upper end of the sealing plate.

[0024] With the above structure, a bypass liquid commutation flow channel is provided inside, so that the heat exchange liquid and the bypass liquid are mixed inside. At the same time, the coolant liquid inlet and the coolant liquid outlet can be on the same side, which is convenient for structural design and installation. External pipelines are saved. The cost is reduced.

[0025] The bypass liquid commutation mechanism includes a bypass liquid commutation flow channel provided on one side of the bottom plate. An internal distribution area is also provided on one side of the sealing plate. The internal distribution area is communicated with the upper end of the bypass liquid commutation flow channel. The lower end of the bypass liquid commutation flow channel is connected with a coolant liquid outlet, and a coolant liquid inlet is fixedly installed at the upper end of the sealing plate.

[0026] With the above structure, an internal distribution area is provided inside, and an external fluid distribution tee is not required. In combination with the bypass liquid commutation flow channel, the heat exchange liquid and the bypass liquid are distributed and mixed inside. Externally, it is the same as a conventional plate heat exchanger, which is convenient for structural design and installation. External pipelines are saved. The cost is reduced.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] 1. By bypassing a part of the fluid, the determining factor of the plate heat exchanger area changes from pressure drop to heat transfer, which can greatly reduce the cost of the plate heat exchanger. According to theoretical calculations and actual tests, the maximum heat transfer area can be reduced by up to 20%.

[0029] 2. The flow rate adjustment structure of the bypass flow path is on each plate and is an inherent property of the plate like the heat transfer corrugation of the plate, so that the flow rate distribution ability varies little within a certain flow rate range. It improves the application range of the product, greatly reduces the adaptation work, and improves the feasibility of mass production.

[0030] 3. The overall flow resistance of the bypass flow path is provided by all the plates together. During use, even if the flow rate adjustment structure of a single or multiple plates fails due to impurities or cyclic impact, there is still a certain adjustment ability. The adjustment function is dispersed in multiple parts to prevent major consequences such as the failure of the bypass flow path flow rate adjustment, resulting in a large amount of liquid bypass, insufficient heat exchange, failure of the unit temperature control, and safety accidents in electrochemical energy storage, greatly improving the reliability of this structure.

[0031] 4. The liquid distribution component at the coolant inlet and the confluence component of the bypass fluid and the heat exchange fluid can be directly brazed during the production process of the plate heat exchanger. For the energy storage liquid cooling temperature control unit, there are still only 2 ports for pipeline connection, without increasing the production workload of the unit while realizing complex functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of the external structure of the present invention.

[0033] Figure 2 is a schematic diagram of the internal structure of the present invention.

[0034] Figure 3 is a side view of the present invention.

[0035] Figure 4 is a schematic diagram of the internal sectional structure of the present invention.

[0036] Figure 5 is Figure 4 a schematic diagram of the area at position C of

[0037] Figure 6 is a schematic diagram of Embodiment 2 of the present invention.

[0038] Figure 7 is a schematic diagram of Embodiment 3 of the present invention.

[0039] Figure 8 is a schematic diagram of the regulating plate in the present invention.

[0040] Figure 9 It is a schematic diagram of the fourth embodiment in the present invention.

[0041] Figure 10 It is a schematic diagram of the interior of the regulating pipe in the present invention.

[0042] Figure 11 It is a schematic diagram of the heat exchange area between the refrigerant and the liquid in the present invention.

[0043] Figure 12 It is a schematic diagram of the fifth embodiment in the present invention.

[0044] Figure 13 It is a schematic diagram of the bypass liquid commutation flow channel in the present invention.

[0045] Figure 14 It is a schematic diagram of the sixth embodiment in the present invention.

[0046] Figure 15 It is a schematic diagram of the internal distribution area in the present invention.

[0047] Figure 16 It is a schematic diagram of another implementation manner of the sixth embodiment in the present invention.

[0048] Figure 17 It is an external structure diagram of another implementation manner of the sixth embodiment in the present invention.

[0049] In the figure: 1, bypass liquid inlet; 2, heat exchange liquid inlet; 3, refrigerant outlet; 4, refrigerant inlet; 5, bypass liquid outlet; 6, refrigerant heat exchange channel; 7, liquid side heat exchange channel; 8, heat exchange liquid outlet; 9, heat exchange plate; 10, heat exchange liquid flow channel; 11, bypass liquid flow channel; 12, round hole; 13, opening; 14, regulating plate; 15, regulating pipe; 16, regulating packing; 17, bypass liquid commutation flow channel; 18, secondary coolant liquid outlet; 19, secondary coolant liquid inlet; 20, internal distribution area; 21, sealing plate; 22, bottom plate; 23, closed flow channel. Specific Embodiments

[0050] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0051] Embodiment 1:

[0052] As Figures 1 - 5As shown in the figure, the heat exchanger with an internal bypass function includes a sealing plate 21 and a bottom plate 22. A plurality of heat exchange plates 9 are arranged between the sealing plate 21 and the bottom plate 22. Refrigerant and liquid heat exchange is carried out between the plurality of heat exchange plates 9. A bypass liquid inlet 1 is fixedly installed in the sealing plate 21, and a bypass liquid outlet 5 that cooperates with the bypass liquid inlet 1 is fixedly installed inside the bottom plate 22. A plurality of closed flow channels 23 are formed between adjacent heat exchange plates 9 through a convex structure and a concave structure. A heat exchange liquid flow channel 10 for conducting the bypass liquid inlet 1 and the bypass liquid outlet 5 is arranged between the plurality of closed flow channels 23;

[0053] A heat exchange liquid inlet 2 and a refrigerant outlet 3 are fixedly installed at the upper end of the sealing plate 21. A refrigerant inlet 4 that cooperates with the refrigerant outlet 3 is fixedly installed at the lower end of the sealing plate 21. A heat exchange liquid outlet 8 that cooperates with the heat exchange liquid inlet 2 is fixedly installed at the lower end of the bottom plate 22;

[0054] A bypass liquid flow channel 11 is arranged inside the heat exchange plate 9 around the bypass liquid inlet 1. The refrigerant outlet 3 of the closed flow channel 23 is communicated with a refrigerant heat exchange channel 6, and the heat exchange liquid inlet 2 is communicated with a liquid side heat exchange channel 7;

[0055] The bypass liquid inside the bypass liquid flow channel 11 cannot contact the refrigerant. A flow rate adjustment mechanism is arranged between the plurality of closed flow channels 23;

[0056] A bypass liquid commutation mechanism is further arranged between the sealing plate 21 and the bottom plate 22.

[0057] The flow rate adjustment mechanism includes a plurality of round holes 12 opened inside the bypass liquid flow channel 11.

[0058] In a conventional plate heat exchanger, all the coolant liquids enter the inside of the heat exchanger. In order to reduce the pressure drop, it is necessary to reduce the flow rate by increasing the number of liquid channels (the number of plates). Since the flow rate of the system coolant liquid is very large, a lot of plates need to be added to reduce the pressure drop. At this time, the number of plates, that is, the heat transfer area, is higher than the number of plates required to achieve the heat transfer performance.

[0059] In the present invention, the coolant liquid is divided into two parts. Due to the existence of the bypass flow channel, the flow rate in the heat exchange flow channel decreases. Therefore, the number of plates required to achieve the target pressure drop also decreases accordingly.

[0060] By adjusting the pressure drop ratio between the heat exchange liquid flow channel and the bypass fluid flow channel, the flow rate of the heat exchange fluid can be reduced to a suitable flow rate. When the number of plates (heat transfer area) required for the pressure drop to decrease is reduced to the number of plates required by the heat transfer requirements, the utilization rate of the plate heat exchanger is the highest.

[0061] The temperature of the bypass liquid itself remains unchanged. To meet the heat dissipation temperature requirement after mixing, the outlet temperature of the heat transfer liquid needs to be slightly lower than the designed heat dissipation temperature. The outlet temperature of the heat exchange liquid is calculated from the ratio of the bypass liquid flow rate to the heat dissipation liquid flow rate.

[0062] Therefore, the flow rate control of the bypass liquid is crucial. To make the flow rate distribution more stable, even when the load is low and the flow rate is low, it can be distributed according to a reasonable ratio.

[0063] Example Two:

[0064] As Figure 6 shown, the flow rate adjustment mechanism includes a plurality of openings 13 formed in the sealing plate 21 and the bottom plate 22. The openings 13 inside the sealing plate 21 are connected to the bypass liquid inlet 1, and the openings 13 inside the bottom plate 22 are connected to the bypass liquid outlet 5.

[0065] A bypass liquid flow path 11 is arranged around the heat exchange liquid inlet 2. The adjacent heat exchange plates 9 form a sealed flow path through the convex structure and the concave structure, and the bypass liquid cannot contact the heat transfer liquid or the refrigerant.

[0066] A flow rate adjustment structure is arranged on the protrusion and concave structure of the plate, including structures such as small holes, oblong holes or irregular holes.

[0067] The flow rate distribution of the heat exchange liquid flow path and the bypass flow path is affected by the pressure drop of the fluid flow of both. The pressure drop of the heat exchange fluid flow path is generated by the flow resistance of the heat transfer corrugated structure of the plate and the corner hole flow path, and the pressure drop of the bypass liquid flow path is generated by the flow resistance of the flow rate adjustment structure and the bypass pipeline itself.

[0068] Example Three:

[0069] As Figures 7 - 8 shown, the flow rate adjustment mechanism includes a plurality of adjusting plates 14 arranged between the sealing plate 21 and the bottom plate 22. Openings are arranged inside the plurality of adjusting plates 14. The adjusting plates 14 with different opening forms have different flow rate adjustment capabilities. The plurality of adjusting plates 14 are fixedly installed through the front and rear two layers of heat exchange plates 9, and different adjusting plates 14 can be matched for heat exchanger products under different heat exchange conditions.

[0070] Example Four:

[0071] As Figures 9 - 10 shown, the flow rate adjustment mechanism includes an adjusting pipe 15 fixedly installed between the sealing plate 21 and the bottom plate 22, and an adjusting packing 16 is installed inside the adjusting pipe 15.

[0072] The flow rate adjustment structure is the adjusting pipe 15, and different adjusting packings 16 provide different adjustment capabilities to adapt to different production processes.

[0073] Example Five:

[0074] As Figures 12 - 13 shown, the bypass liquid commutation mechanism includes a bypass liquid commutation flow channel 17 provided on one side of the bottom plate 22. The upper end of the bypass liquid commutation flow channel 17 is communicated with the bypass liquid inlet 1 and the heat exchange liquid inlet 2. The lower end of the bypass liquid commutation flow channel 17 is connected with a coolant liquid outlet 18. The upper end of the sealing plate 21 is fixedly installed with a coolant liquid inlet 19.

[0075] Providing the bypass liquid commutation flow channel 17 inside enables the heat exchange liquid and the bypass liquid to be mixed inside. At the same time, the coolant liquid inlet 19 and the coolant liquid outlet 18 can be on the same side, which is convenient for structural design and installation. It saves external pipelines and reduces costs.

[0076] Embodiment Six:

[0077] As Figures 14 - 15 shown, the bypass liquid commutation mechanism includes a bypass liquid commutation flow channel 17 provided on one side of the bottom plate 22. An internal distribution area is also provided on one side of the sealing plate 21. The internal distribution area is communicated with the upper end of the bypass liquid commutation flow channel 17. The lower end of the bypass liquid commutation flow channel 17 is connected with a coolant liquid outlet 18. The upper end of the sealing plate 21 is fixedly installed with a coolant liquid inlet 19.

[0078] Setting the internal distribution area inside eliminates the need for a fluid distribution tee externally. In cooperation with the bypass liquid commutation flow channel 17, it enables the heat exchange liquid and the bypass liquid to be distributed and mixed inside. Externally, it is the same as a conventional plate heat exchanger, which is convenient for structural design and installation. It saves external pipelines and reduces costs.

[0079] As Figures 16 - 17 shown, this embodiment can also be applied in a dual system (2 refrigeration systems, 1 liquid system). Since the dual system has greater capacity and larger flow rate, the economic effect obtained can be better. It is an important application field of this invention. Technical solutions of internal commutation or external confluence can be adopted.

[0080] The present invention can bypass a part of the fluid, so that the determining factor of the plate heat exchanger area changes from pressure drop to heat transfer, which can greatly reduce the cost of the plate heat exchanger. According to theoretical calculations and actual tests, the maximum heat transfer area can be reduced by up to 20%. The flow adjustment structure of the bypass flow path is on each plate and is an inherent property of the plate like the heat transfer corrugation of the plate, so that the flow distribution ability varies little within a certain flow range. It improves the application range of the product, greatly reduces the adaptation work, and improves the mass production feasibility. The overall flow resistance of the bypass flow path is provided by all the plates. During use, even if the flow adjustment structure of a single or multiple plates fails due to impurities or cyclic impact, there is still a certain adjustment ability. The adjustment function is dispersed in multiple parts to prevent major consequences such as the failure of the bypass flow path flow adjustment, resulting in a large amount of liquid bypass, insufficient heat exchange, failure of the unit temperature control, and safety accidents in the electrochemical energy storage. This greatly improves the reliability of the structure. The liquid distribution three-way component at the inlet of the secondary refrigerant and the confluence component of the bypass fluid and the heat exchange fluid can be directly brazed during the production process of the plate heat exchanger. For the energy storage liquid cooling temperature control unit, there are still only two ports for pipeline connection, without increasing the production workload of the unit while realizing complex functions.

[0081] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A heat exchanger with an internal bypass function, comprising a sealing plate (21) and a bottom plate (22), characterized in that, A plurality of heat exchange plates (9) are provided between the sealing plate (21) and the bottom plate (22). Refrigerant and liquid heat exchange is carried out between the plurality of heat exchange plates (9). A bypass liquid inlet (1) is fixedly installed in the sealing plate (21). A bypass liquid outlet (5) cooperating with the bypass liquid inlet (1) is fixedly installed inside the bottom plate (22). A plurality of closed flow channels (23) are formed between adjacent heat exchange plates (9) through a convex structure and a concave structure. A heat exchange liquid flow channel (10) for conducting the bypass liquid inlet (1) and the bypass liquid outlet (5) is provided between the plurality of closed flow channels (23). A heat exchange liquid inlet (2) and a refrigerant outlet (3) are fixedly installed at the upper end of the sealing plate (21). A refrigerant inlet (4) cooperating with the refrigerant outlet (3) is fixedly installed at the lower end of the sealing plate (21). A heat exchange liquid outlet (8) cooperating with the heat exchange liquid inlet (2) is fixedly installed at the lower end of the bottom plate (22). A bypass liquid flow channel (11) is provided inside the heat exchange plate (9) around the bypass liquid inlet (1). The refrigerant outlet (3) of the closed flow channel (23) is communicated with a refrigerant heat exchange channel (6). The heat exchange liquid inlet (2) is communicated with a liquid side heat exchange channel (7). The bypass liquid inside the bypass liquid flow channel (11) cannot contact the refrigerant. A flow rate adjustment mechanism is provided between the plurality of closed flow channels (23). A bypass liquid reversing mechanism is further provided between the sealing plate (21) and the bottom plate (22).

2. The heat exchanger with an internal bypass function according to claim 1, characterized in that, The flow rate adjustment mechanism includes a plurality of round holes (12) opened inside the bypass liquid flow channel (11).

3. The heat exchanger with an internal bypass function according to claim 1, characterized in that, The flow rate adjustment mechanism includes a plurality of openings (13) opened inside the sealing plate (21) and the bottom plate (22). The opening (13) inside the sealing plate (21) is communicated with the bypass liquid inlet (1). The opening (13) inside the bottom plate (22) is communicated with the bypass liquid outlet (5).

4. The heat exchanger with an internal bypass function according to claim 1, characterized in that, The flow rate adjustment mechanism includes a plurality of adjusting plates (14) provided between the sealing plate (21) and the bottom plate (22). Openings are provided inside the plurality of adjusting plates (14). The adjusting plates (14) with different opening forms have different flow rate adjustment capabilities. The plurality of adjusting plates (14) are fixedly installed through the front and rear two layers of heat exchange plates (9). Different adjusting plates (14) can be matched for heat exchanger products under different heat exchange conditions.

5. A heat exchanger with an internal bypass function according to claim 1, characterized in that, The flow rate adjustment mechanism includes an adjusting pipe (15) fixedly installed between the sealing plate (21) and the bottom plate (22). An adjusting filler (16) is installed inside the adjusting pipe (15).

6. The heat exchanger with an internal bypass function according to claim 1, wherein, The bypass liquid reversing mechanism includes a bypass liquid reversing flow channel (17) provided on one side of the bottom plate (22). The upper end of the bypass liquid reversing flow channel (17) is communicated with the bypass liquid inlet (1) and the heat exchange liquid inlet (2). The lower end of the bypass liquid reversing flow channel (17) is connected with a coolant liquid outlet (18). A coolant liquid inlet (19) is fixedly installed at the upper end of the sealing plate (21).

7. A heat exchanger with an internal bypass function according to claim 1, characterized in that, The bypass liquid commutation mechanism includes a bypass liquid commutation flow channel (17) arranged on one side of the bottom plate (22). An internal distribution area (20) is also arranged on one side of the sealing plate (21). The internal distribution area (20) is communicated with the upper end of the bypass liquid commutation flow channel (17). The lower end of the bypass liquid commutation flow channel (17) is connected with a refrigerant liquid outlet (18). The upper end of the sealing plate (21) is fixedly provided with a refrigerant liquid inlet (19).

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