A plate type combined heat exchanger

Abstract

The present invention belongs to the technical field of heat exchangers, and discloses a plate-type combined heat exchanger, including a heating core, a cooling core, and a connecting bracket. An exhaust hole is provided on the upper part of the connecting bracket, and the exhaust hole is connected between the upper heat exchange medium main channel of the heating core and the upper heat exchange medium main channel of the cooling core, and is used to allow the gas in the upper heat exchange medium main channel of the cooling core to pass into the upper heat exchange medium main channel of the heating core; the heating core includes a high-temperature medium outlet pipe, and the high-temperature medium outlet pipe is connected to the upper high-temperature medium main channel of the heating core. The high-temperature medium outlet pipe is also provided with an external exhaust pipe, and the external ventilation pipe can discharge the gas in the high-temperature medium outlet pipe. Through the above structure, the plate-type combined heat exchanger can discharge the gas generated in the heat exchange medium and the high-temperature medium, avoid gas accumulation inside, improve the heat exchange performance of the plate-type combined heat exchanger, and extend the service life.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchangers, and in particular to a plate-type combined heat exchanger. Background Art

[0002] As an emerging product among automotive heat exchangers, the new energy vehicle heat exchanger is becoming more and more widely used with the development of the new energy vehicle industry. In the thermal management system of new energy vehicles, the heat exchanger, as one of the core components, must have the characteristics of high heat exchange efficiency and reliable performance. It must not only meet the cooling of automotive power batteries, super charging piles and electronic equipment, but also be able to heat these equipment.

[0003] At present, in order to realize the heating and cooling functions of the thermal management system of new energy vehicles, a plate-type combined heat exchanger with a heating core and a cooling core is usually used to meet the needs of both cooling and heating functions. It has a high degree of integration, can reduce the occupied space, and has low cost of use.

[0004] However, during the heating process, the plate-type combined heat exchanger generates gas due to the evaporation of the internal heat exchange medium, which makes it easy for air chambers to form inside; and because the high-temperature medium has been at a high temperature, it is also easy to evaporate and generate gas, causing air chambers to form in the main flow channel of the high-temperature medium. The long-term accumulation of air chambers will not only affect the overall heat exchange performance of the heat exchanger, but also easily cause cavitation on the heat exchanger, accelerate the aging of the heat exchanger material, and affect the service life of the plate-type combined heat exchanger. Summary of the invention

[0005] The object of the present invention is to provide a plate type combined heat exchanger, which can discharge the gas generated in the heat exchange medium and the high-temperature medium to avoid gas accumulation inside, which is beneficial to improving the heat exchange performance of the plate type combined heat exchanger and extending its service life.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A plate-type combined heat exchanger, comprising:

[0008] A heating core, the heating core comprising a high-temperature medium inlet pipe, a high-temperature medium outlet pipe and a heat exchange medium outlet pipe, the high-temperature medium inlet pipe is connected to the high-temperature medium outlet pipe, the high-temperature medium outlet pipe is connected to the upper high-temperature medium main flow channel of the heating core, and the heat exchange medium outlet pipe is connected to the upper heat exchange medium main flow channel of the heating core; the high-temperature medium outlet pipe is connected to an external exhaust pipe for exhausting gas in the high-temperature medium;

[0009] A cooling core, the cooling core comprising a refrigerant inlet and outlet assembly and a heat exchange medium inlet pipe, the refrigerant inlet and outlet assembly is used to introduce and discharge refrigerant, the heat exchange medium inlet pipe is connected to the upper heat exchange medium main channel of the cooling core, and the lower heat exchange medium main channel of the cooling core is connected to the lower heat exchange medium main channel of the heating core;

[0010] A connecting bracket, wherein the connecting bracket is clamped between the heating core and the cooling core, and the connecting bracket can be connected to external components; an exhaust hole is provided on the upper portion of the connecting bracket, and the two ends of the exhaust hole are respectively connected to the upper heat exchange medium main channel of the heating core and the upper heat exchange medium main channel of the cooling core, and the exhaust hole is used to allow the gas in the upper heat exchange medium main channel of the cooling core to pass into the upper heat exchange medium main channel of the heating core.

[0011] Preferably, a main flow channel opening is provided at the lower portion of the connecting bracket, and two ends of the main flow channel opening are respectively connected to the lower heat exchange medium main flow channel of the heating core and the lower heat exchange medium main flow channel of the cooling core.

[0012] Preferably, the heating core further includes a first bottom plate, the cooling core further includes a second bottom plate, and the connecting bracket is connected between the first bottom plate and the second bottom plate.

[0013] Preferably, a first exhaust hole is provided at the upper portion of the first bottom plate, a second exhaust hole is provided at the upper portion of the second bottom plate, both ends of the exhaust hole are respectively connected to the first exhaust hole and the second exhaust hole, a first flow channel opening is provided at the lower portion of the first bottom plate, a second flow channel opening is provided at the lower portion of the second bottom plate, and both ends of the main flow channel opening are respectively connected to the first flow channel opening and the second flow channel opening.

[0014] Preferably, the cross-sectional area of ​​the exhaust hole is set to be less than or equal to 0.5% of the cross-sectional area of ​​the upper heat exchange medium main flow channel of the cooling core.

[0015] Preferably, the inner diameter of the external exhaust pipe is set to be one third of the inner diameter of the high-temperature medium outlet pipe.

[0016] Preferably, the first bracket assembly and the second bracket assembly are further included, wherein the first bracket assembly is connected to the heating core, and the second bracket assembly is connected to the cooling core, and the first bracket assembly and the second bracket assembly can be connected to external components.

[0017] Preferably, the heating core further comprises a first cover plate, the first bracket assembly is connected to the first cover plate, and the cooling core further comprises a second cover plate, the second bracket assembly is connected to the second cover plate.

[0018] Preferably, the refrigerant inlet and outlet assembly includes a refrigerant inlet, a refrigerant outlet and an inlet and outlet pressure plate, the refrigerant inlet and the refrigerant outlet are both arranged on the inlet and outlet pressure plates, the refrigerant inlet is connected to the upper refrigerant main channel of the cooling core, and the refrigerant outlet is connected to the lower refrigerant main channel of the cooling core.

[0019] Preferably, the refrigerant inlet and outlet assembly further comprises a flow channel cover plate, the flow channel cover plate is covered on the second cover plate, and the inlet and outlet pressure plate is connected to the flow channel cover plate.

[0020] Beneficial effects of the present invention:

[0021] The present invention provides a plate-type combined heat exchanger, which comprises a heating core, a cooling core and a connecting bracket, wherein the lower heat exchange medium main flow channel on the heating core is connected to the lower heat exchange medium main flow channel of the cooling core, and the high-temperature medium can also pass into and be discharged from the heating core through a high-temperature medium inlet pipe and a high-temperature medium outlet pipe, and the refrigerant can pass into and be discharged from the cooling core through a refrigerant inlet and outlet assembly, so that the plate-type combined heat exchanger has the function of heating and cooling the heat exchange medium at the same time; the connecting bracket is sandwiched between the heating core and the cooling core, and the upper part of the connecting bracket is provided with an exhaust hole to connect the upper heat exchange medium main flow channel of the heating core and the upper heat exchange medium main flow channel of the cooling core. The heat exchange medium inlet pipe is connected to the main heat exchange medium channel on the upper part of the cooling core. After the heat exchange medium enters the cooling core, it will send the gas in the main heat exchange medium channel on the upper part of the cooling core to the main heat exchange medium channel on the upper part of the heating core through the exhaust hole, and then transport it to the outside of the plate-type combined heat exchanger under the flow of the heat exchange medium, so as to discharge the gas in the main heat exchange medium channel. Since the high-temperature medium outlet pipe is connected to the main high-temperature medium channel on the upper part of the heating core, the gas generated in the high-temperature medium can be accumulated in the high-temperature medium outlet pipe. The gas accumulated in the high-temperature medium outlet pipe is discharged by connecting the high-temperature medium outlet pipe to the external exhaust pipe. Through the above structure, the plate-type combined heat exchanger can discharge the gas generated in the heat exchange medium and the high-temperature medium, avoid gas accumulation inside, improve the heat exchange performance of the plate-type combined heat exchanger, and extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of a plate-type combined heat exchanger provided in a specific embodiment of the present invention;

[0023] Figure 2 is a cross-sectional view of a plate-type combined heat exchanger provided in a specific embodiment of the present invention;

[0024] Figure 3is a cross-sectional view of a heating core of a plate-type combined heat exchanger provided in a specific embodiment of the present invention;

[0025] Figure 4 It is a structural schematic diagram of a first heat exchange plate of a single flow path in a plate-type combined heat exchanger provided in a specific embodiment of the present invention;

[0026] Figure 5 It is a structural schematic diagram of a first heat exchange plate of multiple processes in a plate-type combined heat exchanger provided in a specific embodiment of the present invention;

[0027] Figure 6 is a cross-sectional view of a cooling core of a plate-type combined heat exchanger provided in a specific embodiment of the present invention;

[0028] Figure 7 It is a structural schematic diagram of a connecting bracket of a plate type combined heat exchanger provided in a specific embodiment of the present invention;

[0029] Figure 8 It is a structural schematic diagram of a first bracket assembly of a plate-type combined heat exchanger provided in a specific embodiment of the present invention;

[0030] Fig. 9 It is a structural schematic diagram of a second bracket assembly of a plate type combined heat exchanger provided in a specific embodiment of the present invention.

[0031] In the figure:

[0032] 1. Heating core; 11. High temperature medium inlet pipe; 12. High temperature medium outlet pipe; 121. External exhaust pipe; 13. Heat exchange medium outlet pipe; 14. First bottom plate; 141. First exhaust hole; 142. First flow channel opening; 143. Positioning boss; 15. First cover plate; 151. Positioning platform; 16. First heat exchange plate; 161. Corrugated protrusion; 162. Through hole; 2. Cooling core; 21. Refrigerant inlet and outlet assembly; 211. Refrigerant inlet; 212. Refrigerant outlet; 213. Inlet and outlet pressure plate; 214. Flow Channel cover plate; 22, heat exchange medium inlet pipe; 23, second bottom plate; 231, second exhaust hole; 232, second flow channel opening; 24, second cover plate; 25, second heat exchange plate; 3, connecting bracket; 31, exhaust hole; 32, main flow channel opening; 33, positioning recessed hole; 34, material removal structure; 35, circular opening positioning hole; 4, first bracket assembly; 41, first bracket; 42, first bracket base; 421, positioning hole; 422, process removal structure; 5, second bracket assembly; 51, second bracket; 52, second bracket base. DETAILED DESCRIPTION

[0033] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] The present invention provides a plate type combined heat exchanger, such as Figure 1As shown, the plate type combined heat exchanger comprises a heating core 1, a cooling core 2 and a connecting bracket 3. The heating core 1 and the cooling core 2 are respectively connected to two sides of the connecting bracket 3. The connecting bracket 3 is used to connect the plate type combined heat exchanger to an external component. The heating core 1 includes a high-temperature medium inlet pipe 11, a high-temperature medium outlet pipe 12 and a heat exchange medium outlet pipe 13. The high-temperature medium inlet pipe 11 is connected to the lower high-temperature medium main channel of the heating core 1, the high-temperature medium outlet pipe 12 is connected to the upper high-temperature medium main channel of the heating core 1, and the heat exchange medium outlet pipe 13 is connected to the upper heat exchange medium main channel of the heating core 1; the cooling core 2 includes a refrigerant inlet and outlet assembly 21 and a heat exchange medium inlet pipe 22. The refrigerant inlet and outlet assembly 21 is used to pass in and out of the refrigerant. The heat exchange medium inlet pipe 22 is connected to the upper heat exchange medium main channel of the cooling core 2. The lower heat exchange medium main channel of the heating core 1 is connected to the lower heat exchange medium main channel of the cooling core 2, so that the heat exchange medium can pass in from the cooling core 2 and flow out from the heating core 1, so that the heat exchange medium can be heated and cooled in the plate-type combined heat exchanger, so that the plate heat exchanger has the functions of heating and cooling at the same time.

[0037] like Figure 2 As shown, an exhaust hole 31 is provided on the upper part of the connecting bracket 3, and the two ends of the exhaust hole 31 are respectively connected to the upper heat exchange medium main channel of the heating core 1 and the upper heat exchange medium main channel of the cooling core 2, so that the gas in the upper heat exchange medium main channel of the cooling core 2 can be passed into the upper heat exchange medium main channel of the heating core 1. When the heat exchange medium flows through the upper heat exchange medium main channel of the heating core 1, it can take away the gas therein and transport it to the outside of the plate-type combined heat exchanger, so as to discharge the gas in the heat exchange medium main channel. Preferably, the cross-sectional area of ​​the exhaust hole 31 is set to be less than or equal to 0.5% of the cross-sectional area of ​​the upper heat exchange medium main channel of the cooling core 2, so that the exhaust hole 31 is convenient for the gas to pass through effectively, and the heat exchange medium loss is not caused due to the excessive area of ​​the exhaust hole 31.

[0038] The high-temperature medium outlet pipe 12 is connected to an external exhaust pipe 121. Since the high-temperature medium outlet pipe 12 is connected to the upper high-temperature medium main flow channel of the heating core 1, the gas generated in the high-temperature medium can be accumulated in the high-temperature medium outlet pipe 12, and the external exhaust pipe 121 can discharge the gas accumulated in the high-temperature medium outlet pipe 12. Preferably, the external exhaust pipe 121 is connected to the upper side pipe wall of the high-temperature medium outlet pipe 12, so that the gas accumulated in the high-temperature medium outlet pipe 12 can be smoothly discharged from the external exhaust pipe 121. More preferably, the inner diameter of the external exhaust pipe 121 is set to one-third of the inner diameter of the high-temperature medium outlet pipe 12, which is convenient for the effective discharge of the gas and does not cause the loss of the high-temperature medium due to the excessive diameter of the exhaust pipe. Through the above structure, the plate-type combined heat exchanger can discharge the gas generated in the heat exchange medium and the high-temperature medium, avoid the accumulation of gas inside the plate-type combined heat exchanger, improve the heat exchange performance of the plate-type combined heat exchanger, and extend the service life.

[0039] like Figure 3 As shown, in this embodiment, the heating core 1 includes a first cover plate 15, a first heat exchange plate 16 and a first bottom plate 14, multiple layers of first heat exchange plates 16 are stacked between the first cover plate 15 and the first bottom plate 14, the first bottom plate 14 is connected to one side of the connecting bracket 3, and the first heat exchange plate 16 and the adjacent first heat exchange plate 16 form a heat exchange fluid channel for the heat exchange medium and a high-temperature fluid channel for the high-temperature medium. The high-temperature medium and the heat exchange medium flow in specific flow channels inside the heating core 1 to achieve heat exchange, and the high-temperature medium completes the heating process of the heat exchange medium. Specifically, a first exhaust hole 141 is provided on the upper part of the first bottom plate 14, and the two ends of the first exhaust hole 141 are respectively connected to the upper heat exchange medium main flow channel of the heating core 1 and the exhaust hole 31, so that the gas passing through the exhaust hole 31 can enter the upper heat exchange medium main flow channel of the heating core 1. Preferably, the first heat exchange plate 16 has a "human" shaped corrugated protrusion 161 in the middle, which can increase the heat exchange area of ​​the first heat exchange plate 16, so that the surface area of ​​the first heat exchange plate 16 is increased by 30%-40%, thereby improving the heating efficiency of the heating core 1. More preferably, the first heat exchange plate 16 is used as a basic heat exchange unit and is stamped using a 0.4mm-0.6mm double-composite aluminum plate mold.

[0040] like Figure 4 As shown, specifically, the four corners of the first heat exchange plate 16 are provided with through holes 162, so that the formed heating core 1 is a single-flow core structure. Figure 5As shown, it can be understood that part of the first heat exchange plate 16 can also be replaced with a triangular through hole 162, and its specific structure and material are consistent with the through hole 162. The only difference is that one of the four corner through holes is a closed plane, that is, the through hole 162 is not processed, and the closed corner can play the role of guiding the internal fluid of the heating core 1 in a divided process, so that the composed heating core 1 is a multi-process core structure. Those skilled in the art can choose according to actual conditions. Two adjacent first heat exchange plates 16 in the heating core 1 are stacked in order to form a separate fluid channel, and three first heat exchange plates 16 are stacked as a group to form alternating, non-interfering and independent fluid flow channels. Specifically, the axial positions of the four corner through holes 162 of the first heat exchange plate 16 are kept consistent to form a high-temperature medium main channel and a heat exchange medium main channel.

[0041] Preferably, the high temperature medium inlet pipe 11 is connected to the lower part of the first cover plate 15, and the high temperature medium outlet pipe 12 and the heat exchange medium outlet pipe 13 are both connected to the upper part of the first cover plate 15, so that the high temperature medium inlet pipe 11, the high temperature medium outlet pipe 12 and the heat exchange medium outlet pipe 13 can be firmly connected to the heating core 1. More preferably, the first bottom plate 14 is connected to one side of the connecting bracket 3 by welding, so that the heating core 1 can be firmly connected to the connecting bracket 3 as a whole.

[0042] like Figure 6 As shown, in this embodiment, the cooling core 2 includes a second cover plate 24, a second heat exchange plate 25 and a second bottom plate 23, multiple layers of second heat exchange plates 25 are stacked between the second cover plate 24 and the second bottom plate 23, the second bottom plate 23 is connected to the side of the connecting bracket 3 away from the first bottom plate 14, and the second heat exchange plate 25 and the adjacent second heat exchange plate 25 form a heat exchange fluid channel for the heat exchange medium and a refrigerant channel for the refrigerant. The refrigerant and the heat exchange medium flow in specific flow channels inside the cooling core 2 to achieve heat exchange, and the refrigerant completes the cooling process of the heat exchange medium. Specifically, a second exhaust hole 231 is provided on the upper part of the second bottom plate 23, and the two ends of the second exhaust hole 231 are respectively connected to the upper heat exchange medium main flow channel of the cooling core 2 and the exhaust hole 31, so that the gas passing through the upper heat exchange medium main flow channel of the cooling core 2 can enter the exhaust hole 31. Preferably, the second heat exchange plate 25 has a "human" shaped corrugated protrusion 161 in the middle, which can increase the heat exchange area of ​​the second heat exchange plate 25, so that the surface area of ​​the second heat exchange plate 25 is increased by 30%-40%, thereby improving the heating efficiency of the cooling core 2. More preferably, the second heat exchange plate 25 is used as a basic heat exchange unit and is stamped using a 0.4mm-0.6mm double-composite aluminum plate mold.

[0043] Specifically, the four corners of the second heat exchange plate 25 are provided with through holes 162, so that the cooling core 2 formed is a single-flow core structure. It can be understood that part of the second heat exchange plate 25 can also be replaced with a triangular through hole 162, and its specific structure and material are consistent with the through hole 162. The only difference is that one of the four corner through holes is a closed plane, that is, the through hole 162 is not processed. The closed corner can play a role in guiding the internal fluid of the cooling core 2 in the divided cooling process, so that the cooling core 2 formed is a multi-flow core structure. Those skilled in the art can choose according to actual conditions. Two adjacent second heat exchange plates 25 in the cooling core 2 are stacked in order to form a separate fluid channel, and three second heat exchange plates 25 are stacked as a group to form alternating, non-interfering and independent fluid flow channels. Specifically, the axial positions of the four corner through holes 162 of the second heat exchange plate 25 are kept consistent to form the refrigerant main channel and the heat exchange medium main channel.

[0044] Preferably, the refrigerant inlet and outlet assembly 21 is mounted on the second cover plate 24, and the refrigerant inlet and outlet assembly 21 includes a refrigerant inlet 211, a refrigerant outlet 212 and an inlet and outlet pressure plate 213. The refrigerant inlet 211 and the refrigerant outlet 212 are both arranged on the inlet and outlet pressure plate 213. The refrigerant inlet 211 is connected to the upper refrigerant main channel of the cooling core 2, and the refrigerant outlet 212 is connected to the lower refrigerant main channel of the cooling core 2, so that the refrigerant can be passed into and discharged from the cooling core 2. Preferably, the refrigerant inlet and outlet assembly 21 also includes a flow channel cover plate 214, which is covered on the second cover plate 24, and the inlet and outlet pressure plate 213 is connected to the flow channel cover plate 214. More preferably, the inlet and outlet pressure plate 213 adopts an integral pressure plate, and the inlet and outlet pressure plate 213 and the flow channel cover plate 214 adopt an integrated welding process, so that the overall connection of the cooling core 2 is firm. Specifically, the refrigerant inlet and outlet assembly 21 further includes an electronic expansion valve or a thermal expansion valve, the opening of which can control the refrigerant properties and flow rate to achieve control of the cooling capacity of the cooling core 2. In this embodiment, the second bottom plate 23 is connected to the side of the connecting bracket 3 away from the heating core 1 by welding, so that the cooling core 2 can be firmly connected to the connecting bracket 3 as a whole.

[0045] like Figure 7As shown, in this embodiment, the lower part of the connecting bracket 3 is provided with a main flow channel opening 32, and the two ends of the main flow channel opening 32 are respectively connected to the lower heat exchange medium main flow channel of the heating core 1 and the lower heat exchange medium main flow channel of the cooling core 2, so that the heat exchange medium in the lower heat exchange medium main flow channel of the heating core 1 can pass through the connecting bracket 3 and enter the lower heat exchange medium main flow channel of the cooling core 2, so as to realize the flow of the heat exchange medium in the entire plate heat exchanger to achieve heat exchange with the high-temperature medium or refrigerant. Specifically, the lower part of the first bottom plate 14 is provided with a first flow channel opening 142, and the lower part of the second bottom plate 23 is provided with a second flow channel opening 232, and the two ends of the first flow channel opening 142 are respectively connected to the lower heat exchange medium main flow channel of the heating core 1 and the main flow channel opening 32, and the two ends of the second flow channel opening 232 are respectively connected to the lower heat exchange medium main flow channel of the cooling core 2 and the main flow channel opening 32.

[0046] Preferably, a positioning recessed hole 33 is provided on the connection bracket 3, and a positioning boss 143 is provided on the side of the first bottom plate 14 and the second bottom plate 23 close to the connection bracket 3. The positioning boss 143 can be inserted into the positioning recessed hole 33, so as to facilitate the positioning of the first bottom plate 14 and the second bottom plate 23 relative to the connection bracket 3. More preferably, a material removal structure 34 is provided on the connection bracket 3, and the material removal structure 34 is used to remove excess material on the connection bracket 3, which can reduce the weight of the connection bracket 3, reduce the use of materials and improve the welding pass rate of the first bottom plate 14, the second bottom plate 23 and the connection bracket 3. In this embodiment, a circular opening positioning hole 35 is provided on the connection bracket 3, which is used to connect the plate-type combined heat exchanger with external components to facilitate the connection.

[0047] In this embodiment, the plate-type combined heat exchanger further comprises a first bracket assembly 4 and a second bracket assembly 5, wherein the first bracket assembly 4 is connected to the heating core 1 for supporting the plate-type combined heat exchanger, and the second bracket assembly 5 is connected to the cooling core 2 for supporting the plate-type combined heat exchanger. Figure 8As shown, preferably, the first bracket assembly 4 includes a first bracket 41 and a first bracket base 42, the first bracket 41 is connected to the first bracket base 42 by bolts, and the first bracket base 42 is welded to the first cover plate 15, so that the first bracket assembly 4 can firmly support the plate-type combined heat exchanger. More preferably, a circular opening positioning hole 35 is provided on the first bracket 41, which is used to connect the plate-type combined heat exchanger with external components, making the connection convenient. Specifically, a positioning hole 421 is provided on the first bracket base 42, and a positioning platform 151 is provided on the first cover plate 15, and the positioning platform 151 can be inserted into the positioning hole 421, which is conducive to the positioning and assembly of the first bracket base 42 and the first cover plate 15. Preferably, the first bracket base 42 is made of aluminum profile, which is light in weight and has a strong connection strength. More preferably, a process removal structure 422 is provided on the first bracket base 42, which is conducive to the welding of the first bracket base 42 to the first cover plate 15.

[0048] like Fig. 9 As shown, the second bracket assembly 5 includes a second bracket 51 and a second bracket base 52, the second bracket 51 is connected to the second bracket base 52 by bolts, and the second bracket base 52 is welded to the second cover plate 24, so that the second bracket assembly 5 can firmly support the plate-type combined heat exchanger. More preferably, a circular opening positioning hole 35 is provided on the second bracket 51, which is used to connect the plate-type combined heat exchanger with external components, making the connection convenient. Specifically, a positioning hole 421 is provided on the second bracket base 52, and a positioning platform 151 is provided on the second cover plate 24. The positioning platform 151 can be inserted into the positioning hole 421, which is conducive to the positioning and assembly of the second bracket base 52 and the second cover plate 24. Preferably, the second bracket base 52 is made of aluminum profile, which is light in weight and has a strong connection strength. More preferably, a process removal structure 422 is provided on the second bracket base 52, which is conducive to the welding of the second bracket base 52 to the second cover plate 24.

[0049] The working process of the plate-type combined heat exchanger provided in the specific implementation manner of the present invention is further described below.

[0050] When the plate-type combined heat exchanger is performing cooling, only the cooling core 2 works and the heating core 1 does not work, that is, the high-temperature medium does not flow into the heating core 1, and only the refrigerant enters the cooling core 2 from the refrigerant inlet 211. The refrigerant and the heat exchange medium exchange heat in the cooling core 2 to cool the heat exchange medium. At this time, the heating core 1 only serves as a circulation channel for the heat exchange medium in the cooling core 2 to flow out from the heat exchange medium outlet pipe 13 through the lower heat exchange medium main channel and the upper heat exchange medium main channel in the heating core 1.

[0051] When the plate-type combined heat exchanger is heating, only the heating core 1 works and the cooling core 2 does not work, that is, the refrigerant does not flow into the cooling core 2, and only the high-temperature medium enters the heating core 1 from the high-temperature medium inlet pipe 11. In the heating core 1, the high-temperature medium exchanges heat with the heat exchange medium to heat the heat exchange medium. At this time, the cooling core 2 only serves as a circulation channel for the heat exchange medium introduced from the heat exchange medium inlet pipe 22 to flow into the heating core 1 through the upper heat exchange medium main channel and the lower heat exchange medium main channel in the cooling core 2. During the heating process, when the high-temperature medium flows in the heating core 1, the generated gas rises to the top of the upper high-temperature medium main channel of the heating core 1 along with the flow of the high-temperature medium, and most of the gas is discharged from the heating core 1 through the external exhaust pipe 121, and a small amount of gas is discharged from the heating core 1 together with the high-temperature medium through the high-temperature medium outlet pipe 12; the heat exchange medium enters the cooling core 2 from the heat exchange medium inlet pipe 22, and enters the heating core 1 from the main channel opening 32, and the gas in the heat exchange medium in the cooling core 2 accumulates in the upper heat exchange medium main channel of the cooling core 2, and passes into the upper heat exchange medium main channel of the heating core 1 from the exhaust hole 31, and is finally discharged from the heating core 1 together with the heat exchange medium.

[0052] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A plate-type combined heat exchanger, characterized in that: include: A heating core (1), the heating core (1) comprising a high-temperature medium inlet pipe (11), a high-temperature medium outlet pipe (12) and a heat exchange medium outlet pipe (13), the high-temperature medium inlet pipe (11) being connected to the high-temperature medium outlet pipe (12), the high-temperature medium outlet pipe (12) being connected to an upper high-temperature medium main flow channel of the heating core (1), and the heat exchange medium outlet pipe (13) being connected to an upper heat exchange medium main flow channel of the heating core (1); the high-temperature medium outlet pipe (12) being connected to an external exhaust pipe (121) for exhausting gas in the high-temperature medium; A cooling core (2), the cooling core (2) comprising a refrigerant inlet and outlet assembly (21) and a heat exchange medium inlet pipe (22), the refrigerant inlet and outlet assembly (21) being used for introducing and discharging refrigerant, the heat exchange medium inlet pipe (22) being connected to an upper heat exchange medium main flow channel of the cooling core (2), and a lower heat exchange medium main flow channel of the cooling core (2) being connected to a lower heat exchange medium main flow channel of the heating core (1); A connecting bracket (3), the connecting bracket (3) is sandwiched between the heating core (1) and the cooling core (2), and the connecting bracket (3) can be connected to an external component; an exhaust hole (31) is provided on the upper part of the connecting bracket (3), and the two ends of the exhaust hole (31) are respectively connected to the upper heat exchange medium main channel of the heating core (1) and the upper heat exchange medium main channel of the cooling core (2), and the exhaust hole (31) is used to allow the gas in the upper heat exchange medium main channel of the cooling core (2) to pass into the upper heat exchange medium main channel of the heating core (1).

2. The plate type combined heat exchanger according to claim 1, characterized in that: A main flow channel opening (32) is provided at the lower portion of the connecting bracket (3), and two ends of the main flow channel opening (32) are respectively connected to the lower heat exchange medium main flow channel of the heating core (1) and the lower heat exchange medium main flow channel of the cooling core (2).

3. The plate type combined heat exchanger according to claim 2, characterized in that: The heating core (1) further comprises a first bottom plate (14), the cooling core (2) further comprises a second bottom plate (23), and the connecting bracket (3) is connected between the first bottom plate (14) and the second bottom plate (23).

4. The plate type combined heat exchanger according to claim 3, characterized in that: A first exhaust hole (141) is provided on the upper portion of the first bottom plate (14), a second exhaust hole (231) is provided on the upper portion of the second bottom plate (23), two ends of the exhaust hole (31) are respectively connected to the first exhaust hole (141) and the second exhaust hole (231), a first flow channel opening (142) is provided on the lower portion of the first bottom plate (14), a second flow channel opening (232) is provided on the lower portion of the second bottom plate (23), and two ends of the main flow channel opening (32) are respectively connected to the first flow channel opening (142) and the second flow channel opening (232).

5. The plate type combined heat exchanger according to claim 1, characterized in that: The cross-sectional area of ​​the exhaust hole (31) is set to be less than or equal to 0.5% of the cross-sectional area of ​​the upper heat exchange medium main flow channel of the cooling core (2).

6. The plate type combined heat exchanger according to claim 1, characterized in that: The inner diameter of the external exhaust pipe (121) is set to be one third of the inner diameter of the high-temperature medium outlet pipe (12).

7. The plate type combined heat exchanger according to claim 1, characterized in that: It also includes a first bracket assembly (4) and a second bracket assembly (5), wherein the first bracket assembly (4) is connected to the heating core (1), and the second bracket assembly (5) is connected to the cooling core (2), and the first bracket assembly (4) and the second bracket assembly (5) can be connected to external components.

8. The plate type combined heat exchanger according to claim 7, characterized in that: The heating core (1) further comprises a first cover plate (15), the first bracket assembly (4) being connected to the first cover plate (15), and the cooling core (2) further comprises a second cover plate (24), the second bracket assembly (5) being connected to the second cover plate (24).

9. The plate type combined heat exchanger according to claim 8, characterized in that: The refrigerant inlet and outlet assembly (21) comprises a refrigerant inlet (211), a refrigerant outlet (212) and an inlet and outlet pressure plate (213); the refrigerant inlet (211) and the refrigerant outlet (212) are both arranged on the inlet and outlet pressure plate (213); the refrigerant inlet (211) is connected to an upper refrigerant main flow channel of the cooling core (2); and the refrigerant outlet (212) is connected to a lower refrigerant main flow channel of the cooling core (2).

10. The plate type combined heat exchanger according to claim 9, characterized in that: The refrigerant inlet and outlet assembly (21) further comprises a flow channel cover plate (214), wherein the flow channel cover plate (214) is covered on the second cover plate (24), and the inlet and outlet pressure plate (213) is connected to the flow channel cover plate (214).

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