Heat exchanger
By providing a partition in the heat exchanger, the intermediate heat exchanger and the evaporator are integrated into one structure, the problem of the existing plate heat exchanger being supercooled or overheated during the condensation and evaporation process is solved, achieving more efficient heat exchange and lower cost.
Patent Information
- Application Number
- CN202311870295.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2025-07-01
Smart Images
Figure CN120232287A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to a heat exchanger. Background Art
[0002] Heat exchanger solutions for specific applications are known in the prior art and are intended to manage the temperature of a given fluid circulating in a given system. The heat exchanger is adapted to perform a heat exchange operation between two fluids, namely, between a working fluid and an exchange fluid.
[0003] Conventionally, the working fluid is oil, which circulates in one or more operating groups (such as a gearbox group, a transmission group, an engine group) to manage the temperature of the operating group. The working fluid can also be a refrigerant fluid. For example, a refrigerant fluid refers to one of the fluids commonly used in a refrigeration cycle (such as R134a, R744, R290, R718, R717, R1234yfa or R1234yf). Generally, the exchange fluid is a water-based liquid. It is necessary to manage the temperature of the operating group in the best possible way to improve the efficiency of the operating group and extend its life cycle, thereby improving the performance and life cycle of the entire system. Therefore, there is an increasing desire to manage the temperature of each operating group in the best possible way by providing specific components such as a heat exchanger.
[0004] Existing plate heat exchangers only have the functions of condensation or evaporation. Insufficient subcooling during condensation will reduce the cooling capacity, and insufficient superheating during evaporation will cause liquid slugging of the liquid entering the compressor, reducing the service life of the compressor. Generally, to solve such problems, an additional intermediate heat exchanger can be added to achieve sufficient subcooling of the refrigerant liquid and sufficient superheating of the gas. However, such a structure increases the cost and has low economy.
[0005] Therefore, it is desirable to obtain a heat exchanger that can integrate an intermediate heat exchanger into the structure of the heat exchanger. Summary of the Invention
[0006] According to one aspect of the present application, there is provided a heat exchanger, which includes: an upper plate-like element and a lower plate-like element, the lower plate-like element having a first partition portion extending vertically upward; a plurality of intermediate plate-like elements vertically stacked between the upper plate-like element and the lower plate-like element, thereby together forming a heat exchange stack that defines a heat exchange space between adjacent plate-like elements. Each intermediate plate-like element has a second partition portion extending vertically upward. The first partition portion and the second partition portion divide the heat exchange stack into a first heat exchange portion and a second heat exchange portion in the horizontal direction. The heat exchange space of the first heat exchange portion is arranged to be alternately passed through by a first fluid and a third fluid, and the heat exchange space of the second heat exchange portion is arranged to be alternately passed through by a second fluid and a fourth fluid.
[0007] In this way, by setting the separation part, two different heat exchange parts are integrated into a stacked structure, thus saving space.
[0008] Furthermore, the first heat exchange part is the intermediate heat exchange part, and the second heat exchange part is the evaporator.
[0009] In this way, by setting the intermediate heat exchange part and the evaporator, the liquid can be fully subcooled and the gas can be fully superheated, thereby improving the heat exchange efficiency.
[0010] Furthermore, the third fluid and the fourth fluid are the same fluid.
[0011] In this way, by setting the third fluid and the fourth fluid as the same fluid, the types of fluids are reduced, and the structure of the heat exchanger can be simplified.
[0012] Furthermore, the heat exchanger further includes: an intermediate heat exchange medium inlet and an intermediate heat exchange medium outlet provided on the upper end plate-like element, and a connection channel provided in the lower end plate-like element. The fourth fluid enters the second heat exchange part from the intermediate heat exchange medium inlet, and the fourth fluid after completing the heat exchange enters the first heat exchange part from the connection channel as the third fluid, and the third fluid flows out of the first heat exchange part from the intermediate heat exchange medium outlet.
[0013] In this way, by setting the connection channel, the conversion of the fourth fluid to the third fluid can be easily achieved.
[0014] Furthermore, the width of the first separation part and the second separation part in the horizontal direction is greater than or equal to the vertical distance between adjacent intermediate plate-like elements.
[0015] In this way, by setting the width of the first separation part and the second separation part to be greater than or equal to the vertical distance between adjacent intermediate plate-like elements, a sufficient separation distance is ensured, thereby ensuring the heat isolation effect.
[0016] Furthermore, the projections of the first separation part and the second separation part in the stacking direction of the heat exchange stack coincide.
[0017] In this way, by making the projections of the first separation part and the second separation part coincide, the shapes of the first heat exchange part and the second heat exchange part are regular in the vertical direction, further ensuring the heat isolation effect.
[0018] Furthermore, the ratio L1 / L2 of the horizontal extension length L1 of the second heat exchange part to the horizontal extension length L2 of the first heat exchange part is greater than 1.
[0019] In this way, by setting the length L1 of the second heat exchange part to be greater than the length L2 of the first heat exchange part, the performance on one side of the second heat exchange part is ensured.
[0020] Furthermore, the heat exchanger further includes: a first fluid outlet, a second fluid inlet, and a second fluid outlet located on the upper end plate-like element, and a first fluid inlet located on the lower end plate-like element.
[0021] In this way, by arranging the first fluid outlet, the second fluid inlet, and the second fluid outlet on the upper end plate-like element and arranging the first fluid inlet on the lower end plate-like element, the circuit can be easily connected without occupying additional side space.
[0022] Furthermore, the heat exchanger further includes: an electronic expansion valve disposed between the first fluid outlet and the intermediate heat exchange medium inlet for converting the high-pressure first fluid into a low-pressure fourth fluid.
[0023] In this way, by providing the electronic expansion valve, the high-pressure first fluid can be converted into a low-pressure fourth fluid.
[0024] Furthermore, the upper end plate-like element, the lower end plate-like element, and the plurality of intermediate plate-like elements are in a rectangular shape.
[0025] In this way, by arranging the upper end plate-like element, the lower end plate-like element, and the plurality of intermediate plate-like elements in a rectangular shape, it is convenient to align them with each other during assembly.
[0026] Furthermore, corresponding openings are provided on the intermediate plate-like element corresponding to the intermediate heat exchange medium inlet and the intermediate heat exchange medium outlet provided on the upper end plate-like element, and the positions of the intermediate heat exchange medium inlet and the intermediate heat exchange medium outlet on the upper end plate-like element and the corresponding openings on the intermediate plate-like element are configured such that the first fluid or the third fluid in each heat exchange space of the first heat exchange portion forms an I-shaped flow.
[0027] In this way, by guiding both the first fluid and the third fluid into an I-shaped flow, it is convenient for the two to achieve efficient heat exchange.
[0028] Furthermore, the I-shaped flow of the first fluid in the adjacent heat exchange spaces of the first heat exchange portion is arranged crosswise with the I-shaped flow of the third fluid.
[0029] In this way, by arranging the I-shaped flow of the first fluid to cross the I-shaped flow of the third fluid, the heat exchange efficiency between the first fluid and the third fluid can be increased.
[0030] Furthermore, the intermediate plate-like element (504) is further provided with a plurality of first turbulence protrusions (5055) in the region corresponding to the first heat exchange portion (505) so as to form local turbulence in the I-shaped flow.
[0031] In this way, by providing the first turbulent protrusion, local turbulence can be formed in the I-shaped flow.
[0032] Furthermore, the intermediate plate-like element is provided with guiding ridges in the middle of the region corresponding to the second heat exchange portion, and the guiding ridges are configured to guide the second fluid or the fourth fluid in each heat exchange space of the second heat exchange portion (506) into a U-shaped flow.
[0033] In this way, by guiding both the second fluid and the fourth fluid into U-shaped flows, it is convenient for the two to achieve efficient heat exchange.
[0034] Furthermore, the intermediate plate-like element is configured such that the U-shaped flow of the second fluid and the U-shaped flow of the fourth fluid are superposed along the stacking direction of the heat exchange stack and the U-shaped openings of the U-shaped flows face opposite to each other.
[0035] In this way, by relatively arranging the U-shaped flow of the second fluid and the U-shaped flow of the fourth fluid, the heat exchange efficiency between the second fluid and the fourth fluid can be increased.
[0036] Furthermore, the intermediate plate-like element is further provided with a plurality of second turbulent protrusions in the region corresponding to the second heat exchange portion, so as to form local turbulence in the U-shaped flow.
[0037] In this way, by providing the second turbulent protrusion, local turbulence can be formed in the U-shaped flow.
[0038] Furthermore, the first fluid, the third fluid, and the fourth fluid are refrigerants, and the second fluid is a coolant for cooling the refrigerant.
[0039] In this way, by setting the first fluid, the third fluid, and the fourth fluid as refrigerants and setting the second fluid as a coolant, the cooling of the refrigerant can be completed.
[0040] Through the heat exchanger of the present application, at least the following beneficial technical effects can be achieved.
[0041] First, by providing the partition portion, the intermediate heat exchanger can be integrated into the heat exchanger, thereby saving space.
[0042] Second, by setting the length of the evaporator to be greater than the length of the intermediate heat exchange portion, the performance on the evaporator side is ensured.
[0043] Third, by providing the intermediate heat exchange portion and the evaporator, the liquid can be sufficiently subcooled and the gas can be sufficiently superheated, thereby improving the heat exchange efficiency. Description of the Drawings
[0044] Other features and advantages of the present application will become apparent from the following description of the preferred embodiments of the present application provided with reference to the accompanying drawings in a non-limiting indicative manner. In the drawings:
[0045] Figure 1 is an exploded view of a heat exchanger according to an embodiment of the present application.
[0046] Figure 2 is a perspective view of an intermediate plate-like element according to an embodiment of the present application, in which the I-shaped flow and the U-shaped flow are schematically shown.
[0047] Figure 3 is a perspective view of an upper end plate-like element according to an embodiment of the present application.
[0048] 500, heat exchanger; 502, upper end plate-like element; 503, lower end plate-like element; 5031, first partition; 5032, connection channel; 504, intermediate plate-like element; 5041, second partition; 505, first heat exchange part; 506, second heat exchange part; 511, first fluid inlet; 512, first fluid outlet; 521, second fluid inlet; 522, second fluid outlet; 531, intermediate heat exchange medium inlet; 532, intermediate heat exchange medium outlet; 540, electronic expansion valve; 5055, first turbulence protrusion; 5065, second turbulence protrusion. Detailed Embodiments
[0049] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way restrictive of the present application and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.
[0050] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form.
[0051] Figure 1 is an exploded view of a heat exchanger according to an embodiment of the present application.
[0052] According to one aspect of the present application, a heat exchanger 500 is provided. The heat exchanger 500 includes: an upper end plate-like element 502 and a lower end plate-like element 503, the lower end plate-like element 503 having a first partition portion 5031 extending vertically upward; a plurality of intermediate plate-like elements 504 vertically stacked between the upper end plate-like element 502 and the lower end plate-like element 503, thereby together forming a heat exchange stack that defines heat exchange spaces between adjacent plate-like elements. Each intermediate plate-like element 504 has a second partition portion 5041 extending vertically upward. The first partition portion 5031 and the second partition portion 5041 divide the heat exchange stack into a first heat exchange portion 505 and a second heat exchange portion 506 in the horizontal direction. The heat exchange spaces of the first heat exchange portion 505 are arranged to be alternately passed through by a first fluid and a third fluid, and the heat exchange spaces of the second heat exchange portion 506 are arranged to be alternately passed through by a second fluid and a fourth fluid. By providing the partition portions, two different heat exchange portions are integrated into one stacked structure, thereby saving space.
[0053] The first heat exchange portion 505 is an intermediate heat exchange portion, and the second heat exchange portion 506 is an evaporator. By providing the intermediate heat exchange portion and the evaporator, the liquid can be sufficiently subcooled and the gas can be sufficiently superheated, thereby improving the heat exchange efficiency. The third fluid and the fourth fluid are the same fluid. By setting the third fluid and the fourth fluid to be the same fluid, the types of fluids are reduced, and the structure of the heat exchanger can be simplified.
[0054] The heat exchanger further includes: an intermediate heat exchange medium inlet 531 and an intermediate heat exchange medium outlet 532 provided on the upper end plate-like element 502, and a connection channel 5032 provided in the lower end plate-like element 503. The fourth fluid enters the second heat exchange portion 506 from the intermediate heat exchange medium inlet 531, and the fourth fluid after completing the heat exchange enters the first heat exchange portion 505 as the third fluid from the connection channel 5032, and the third fluid flows out of the first heat exchange portion 505 from the intermediate heat exchange medium outlet 532. By providing the connection channel 5032, the conversion of the fourth fluid to the third fluid can be easily achieved.
[0055] The widths of the first partition portion 5031 and the second partition portion 5041 in the horizontal direction are greater than or equal to the vertical distance between adjacent intermediate plate-like elements. By setting the widths of the first partition portion 5031 and the second partition portion 5041 to be greater than or equal to the vertical distance between adjacent intermediate plate-like elements, a sufficient separation distance is ensured, thereby ensuring the heat isolation effect.
[0056] The projections of the first partition portion 5031 and the second partition portion 5041 in the stacking direction of the heat exchange stack coincide. The stacking direction of the heat exchange stack may be the vertical direction.
[0057] By making the projections of the first partition portion 5031 and the second partition portion 5041 coincide, the shapes of the first heat exchange portion 505 and the second heat exchange portion 506 are regular in the vertical direction, further ensuring the thermal isolation effect.
[0058] The ratio L1 / L2 of the horizontal extension length L1 of the second heat exchange portion 506 to the horizontal extension length L2 of the first heat exchange portion 505 is L1 / L2 > 1. By setting the length L1 of the second heat exchange portion 506 to be greater than the length L2 of the first heat exchange portion 505, the performance on one side of the second heat exchange portion 506 is ensured.
[0059] The heat exchanger further includes: a first fluid outlet 512, a second fluid inlet 521, and a second fluid outlet 522 located on the upper end plate-like element 502, and a first fluid inlet 511 located on the lower end plate-like element 503. By arranging the first fluid outlet 512, the second fluid inlet 521, and the second fluid outlet 522 on the upper end plate-like element 502 and arranging the first fluid inlet 511 on the lower end plate-like element 503, the circuit can be easily connected without occupying additional side space.
[0060] The heat exchanger further includes: an electronic expansion valve 540, disposed between the first fluid outlet 512 and the intermediate heat exchange medium inlet 531, for converting the high-pressure first fluid into a low-pressure fourth fluid. By providing the electronic expansion valve 540, the high-pressure first fluid can be converted into a low-pressure fourth fluid.
[0061] The upper end plate-like element 502, the lower end plate-like element 503, and the plurality of intermediate plate-like elements 504 are rectangular in shape. By arranging the upper end plate-like element 502, the lower end plate-like element 503, and the plurality of intermediate plate-like elements 504 in a rectangular shape, it is convenient to align them with each other during assembly.
[0062] Figure 2 It is a perspective view of an intermediate plate-like element according to an embodiment of the present application, in which an I-shaped flow and a U-shaped flow are schematically shown. Figure 3 It is a perspective view of an upper end plate-like element according to an embodiment of the present application.
[0063] Corresponding openings corresponding to the intermediate heat exchange medium inlet 531 and the intermediate heat exchange medium outlet 532 provided on the upper end plate-like element 502 are provided on the intermediate plate-like element 504, and the positions of the intermediate heat exchange medium inlet 531 and the intermediate heat exchange medium outlet 532 on the upper end plate-like element 502 and the corresponding openings on the intermediate plate-like element 504 are configured such that the first fluid or the third fluid in each heat exchange space of the first heat exchange portion 505 forms an I-shaped flow. By guiding both the first fluid and the third fluid into an I-shaped flow, it is convenient for the two to achieve efficient heat exchange.
[0064] The I-shaped flow of the first fluid and the I-shaped flow of the third fluid in the adjacent heat exchange spaces of the first heat exchange part 505 are arranged crosswise. By arranging the I-shaped flow of the first fluid to cross the I-shaped flow of the third fluid, the heat exchange efficiency between the first fluid and the third fluid can be increased.
[0065] The intermediate plate-like element 504 is further provided with a plurality of first turbulence protrusions 5055 in the area corresponding to the first heat exchange part 505, so as to form local turbulence in the I-shaped flow. By providing the first turbulence protrusions, local turbulence can be formed in the I-shaped flow. The intermediate plate-like element 504 is provided with a guiding rib in the middle of the area corresponding to the second heat exchange part 506, and the guiding rib is configured to guide the second fluid or the fourth fluid in each heat exchange space of the second heat exchange part 506 into a U-shaped flow. By guiding both the second fluid and the fourth fluid into a U-shaped flow, it is convenient for the two to achieve efficient heat exchange.
[0066] The intermediate plate-like element 504 is configured such that the U-shaped flow of the second fluid and the U-shaped flow of the fourth fluid are stacked along the stacking direction of the heat exchange stack and the U-shaped openings of the U-shaped flows face each other in opposite directions. By arranging the U-shaped flow of the second fluid and the U-shaped flow of the fourth fluid relatively, the heat exchange efficiency between the second fluid and the fourth fluid can be increased.
[0067] The intermediate plate-like element 504 is further provided with a plurality of second turbulence protrusions 5065 in the area corresponding to the second heat exchange part 506, so as to form local turbulence in the U-shaped flow. By providing the second turbulence protrusions, local turbulence can be formed in the U-shaped flow.
[0068] The first fluid, the third fluid and the fourth fluid are refrigerants, and the second fluid is a coolant for cooling the refrigerant. By setting the first fluid, the third fluid and the fourth fluid as refrigerants and the second fluid as a coolant, the cooling of the refrigerant can be completed.
[0069] Through the heat exchanger of the present application, at least the following beneficial technical effects can be achieved.
[0070] First, by providing the partition part, the intermediate heat exchanger can be integrated into the heat exchanger, thus saving space.
[0071] Second, by setting the length of the evaporator to be greater than the length of the intermediate heat exchange part, the performance on the evaporator side is ensured.
[0072] Third, by providing the intermediate heat exchange part and the evaporator, the liquid can be fully subcooled and the gas can be fully superheated, thereby improving the heat exchange efficiency.
[0073] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.
Claims
1. A heat exchanger (500), characterized in that, The heat exchanger (500) includes: an upper plate-like element (502) and a lower plate-like element (503), the lower plate-like element (503) having a first partition portion (5031) extending vertically upward; a plurality of intermediate plate-like elements (504) vertically stacked between the upper plate-like element (502) and the lower plate-like element (503) to together form a heat exchange stack defining heat exchange spaces between adjacent plate-like elements. Each intermediate plate-like element (504) has a second partition portion (5041) extending vertically upward. The first partition portion (5031) and the second partition portion (5041) divide the heat exchange stack into a first heat exchange portion (505) and a second heat exchange portion (506) in the horizontal direction. The heat exchange spaces of the first heat exchange portion (505) are arranged to be alternately passed through by a first fluid and a third fluid, and the heat exchange spaces of the second heat exchange portion (506) are arranged to be alternately passed through by a second fluid and a fourth fluid.
2. The heat exchanger according to claim 1, characterized in that, The first heat exchange portion (505) is an intermediate heat exchange portion, and the second heat exchange portion (506) is an evaporator.
3. The heat exchanger according to claim 1, characterized in that, The third fluid and the fourth fluid are the same fluid.
4. The heat exchanger according to claim 1, wherein, It further includes: an intermediate heat exchange medium inlet (531) and an intermediate heat exchange medium outlet (532) provided on the upper plate-like element (502), and a connection channel (5032) provided in the lower plate-like element (503). The fourth fluid enters the second heat exchange portion (506) from the intermediate heat exchange medium inlet (531), and the fourth fluid after completing heat exchange enters the first heat exchange portion (505) from the connection channel (5032) as the third fluid. The third fluid flows out of the first heat exchange portion (505) from the intermediate heat exchange medium outlet (532).
5. The heat exchanger according to claim 1, characterized in that, The widths of the first partition portion (5031) and the second partition portion (5041) in the horizontal direction are greater than or equal to the vertical distance between adjacent intermediate plate-like elements.
6. The heat exchanger according to any one of claims 1 to 5, characterized in that, The projections of the first partition portion (5031) and the second partition portion (5041) in the stacking direction of the heat exchange stack coincide.
7. The heat exchanger according to claim 6, characterized in that, The ratio L1 / L2 of the horizontal extension length L1 of the second heat exchange portion (506) to the horizontal extension length L2 of the first heat exchange portion (505) is greater than 1.
8. The heat exchanger according to claim 4, characterized in that, It further includes: a first fluid outlet (512), a second fluid inlet (521), and a second fluid outlet (522) located on the upper plate-like element (502), and a first fluid inlet (511) located on the lower plate-like element (503).
9. The heat exchanger according to claim 8, wherein, It further includes: an electronic expansion valve (540) provided between the first fluid outlet (512) and the intermediate heat exchange medium inlet (531) for converting the high-pressure first fluid into the low-pressure fourth fluid.
10. The heat exchanger according to any one of claims 1 to 5, characterized in that, The upper plate-like element (502), the lower plate-like element (503), and the plurality of intermediate plate-like elements (504) are rectangular in shape.
11. The heat exchanger according to any one of claims 1 to 5, characterized in that, The intermediate plate-like element (504) is provided with corresponding openings corresponding to the intermediate heat exchange medium inlet (531) and the intermediate heat exchange medium outlet (532) provided on the upper end plate-like element (502), and the positions of the intermediate heat exchange medium inlet (531) and the intermediate heat exchange medium outlet (532) on the upper end plate-like element (502) and the corresponding openings on the intermediate plate-like element (504) are configured such that the first fluid or the third fluid in each heat exchange space of the first heat exchange portion (505) forms an I-shaped flow.
12. The heat exchanger according to claim 11, wherein, The I-shaped flows of the first fluid in adjacent heat exchange spaces of the first heat exchange portion (505) are arranged to cross the I-shaped flows of the third fluid.
13. The heat exchanger according to claim 11, characterized in that, The intermediate plate-like element (504) is further provided with a plurality of first turbulence protrusions (5055) in a region corresponding to the first heat exchange portion (505), so as to form local turbulence in the I-shaped flow.
14. The heat exchanger according to any one of claims 1 to 5, characterized in that, The intermediate plate-like element (504) is provided with a guiding rib in the middle of the region corresponding to the second heat exchange portion (506), and the guiding rib is configured to guide the second fluid or the fourth fluid in each heat exchange space of the second heat exchange portion (506) into a U-shaped flow.
15. The heat exchanger according to claim 14, characterized in that, The intermediate plate-like element (504) is configured such that the U-shaped flows of the second fluid and the U-shaped flows of the fourth fluid are superimposed along the stacking direction of the heat exchange stack and the U-shaped openings of the U-shaped flows face each other in opposite directions.
16. The heat exchanger according to claim 14, wherein The intermediate plate-like element (504) is further provided with a plurality of second turbulence protrusions (5065) in a region corresponding to the second heat exchange portion (506), so as to form local turbulence in the U-shaped flow.
17. The heat exchanger according to any one of claims 1 to 5, characterized in that, The first fluid, the third fluid, and the fourth fluid are refrigerants, and the second fluid is a coolant for cooling the refrigerants.