Heat exchanger and air conditioner

Abstract

The utility model discloses a heat exchanger and air conditioner, the heat exchanger includes: heat exchanger body, and heat exchanger body has the heat exchange flow path and with the first total import and export and second total import and export of heat exchange flow path communication, gas -liquid separator, gas -liquid separator includes first import and export, second import and export and gas outlet, and gas -liquid separator includes at least one Tesla valve unit, and gas outlet and first total import and export communication, and gas -liquid separator is located between heat exchange flow path and second total import and export, and first import and export and heat exchange flow path communication, and second import and export and second total import and export communication, or, gas -liquid separator is located on heat exchange flow path, and first import and export and second import and export are communicated with heat exchange flow path respectively. According to the heat exchanger of the utility model embodiment, the dryness of the flowing medium into the heat exchange flow path is reduced, and the Tesla valve unit does not need to store more refrigerant, and the defect that the power is higher when the air conditioner refrigeration operation is caused by the refrigerant injection volume increase of air conditioner is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of air handling equipment technology, and in particular to a heat exchanger and an air conditioner. Background Technology

[0002] Gas-liquid separators are an important component of the heat exchange system of air conditioners. However, existing gas-liquid separators are usually connected in series between the outdoor heat exchanger and the indoor heat exchanger. They have the disadvantages of large volume, occupying space in the outdoor unit casing and high cost. In addition, the gas-liquid separator stores a lot of refrigerant, which increases the refrigerant charge of the air conditioning system and results in higher power consumption when the air conditioner is running in cooling mode. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a heat exchanger in which the gas-liquid separator, through a Tesla valve unit, reduces the dryness of the flowing medium entering the heat exchange path, thereby improving the heat exchange efficiency of the heat exchanger. Simultaneously, the Tesla valve unit does not require the storage of a large amount of refrigerant, effectively solving the defect of high power consumption during air conditioner cooling operation caused by increased refrigerant charge.

[0004] This utility model also proposes an air conditioner, which includes the heat exchanger described above.

[0005] A heat exchanger according to an embodiment of the present invention is used in an air conditioner and includes: a heat exchanger body having a heat exchange flow path and a first main inlet and a second main inlet and outlet connected to the heat exchange flow path; a gas-liquid separator including a first inlet and outlet, a second inlet and outlet, and a gas outlet, the gas-liquid separator including at least one Tesla valve unit, the gas outlet being connected to the first main inlet and outlet, the gas-liquid separator being located between the heat exchange flow path and the second main inlet and outlet, the first inlet and outlet being connected to the heat exchange flow path, and the second inlet and outlet being connected to the second main inlet and outlet; or, the gas-liquid separator is disposed on the heat exchange flow path, and the first inlet and outlet and the second inlet and outlet are respectively connected to the heat exchange flow path.

[0006] According to an embodiment of the present invention, the heat exchanger body has a heat exchange flow path and a first main inlet and a second main inlet and a third inlet connected to the heat exchange flow path. The gas-liquid separator includes a first inlet and a second inlet and a gas outlet. The gas outlet is connected to the first main inlet and a third inlet via the gas-liquid separator, which is located between the heat exchange flow path and the second main inlet and a third inlet. The first inlet and a third inlet are connected to the heat exchange flow path, and the second inlet and a third inlet are connected to the second main inlet and a third inlet. Alternatively, the gas-liquid separator is located on the heat exchange flow path, with the first inlet and a third inlet connected to the heat exchange flow path, thereby reducing the dryness of the flowing medium entering the heat exchange flow path and improving the heat exchanger's heat exchange efficiency. Simultaneously, the Tesla valve unit, as a non-moving part, effectively eliminates mechanical wear and noise caused by the movement of the mechanical valve body structure, reduces system pressure drop losses, and improves the reliability of the heat exchanger. In addition, by integrating the gas-liquid separator into the heat exchange flow path, the gas-liquid separator has the advantages of small size, small volume and low cost, achieving compactness and lightweight. Moreover, the Tesla valve unit does not need to store a lot of refrigerant, effectively solving the defect of high power consumption during air conditioner cooling operation caused by increased refrigerant charge.

[0007] In some embodiments of this utility model, a control valve is further included, which is connected in series between the first main inlet / outlet and the gas outlet.

[0008] In some embodiments of this utility model, the control valve is a one-way valve and only allows the flowing medium to flow from the gas outlet to the first total inlet and outlet.

[0009] In some embodiments of this utility model, the resistance of the fluid passing through the control valve in the direction from the gas outlet to the first total inlet / outlet is the first resistance, and the resistance of the fluid passing through the control valve in the direction from the first total inlet / outlet to the gas outlet is the second resistance, wherein the first resistance is greater than the second resistance.

[0010] In some embodiments of this invention, the control valve includes a plurality of the Tesla valve units.

[0011] In some embodiments of this utility model, the Tesla valve unit includes an inlet section, an arc section, a connecting section, and a first straight section. The connecting section includes a second straight section and an extension section. The two ends of the arc section along its length are respectively connected to one end of the extension section and one end of the first straight section. The end of the extension section facing away from the arc section is connected to and communicates with the peripheral wall of the second straight section. The inlet section is connected to the end of the first straight section facing away from the arc section and the end of the second straight section. In the gas-liquid separator, the end of the second straight section facing away from the inlet section is connected to the gas outlet and the first inlet / outlet, and the end of the inlet section facing away from the first straight section is connected to the second inlet / outlet. In the control valve, the end of the second straight section facing away from the inlet section is connected to the gas outlet, and the end of the inlet section facing away from the first straight section is connected to the first main inlet / outlet.

[0012] In some embodiments of this utility model, in the gas-liquid separator, the Tesla valve unit further includes: a gas section, the gas section being parallel to the first straight section, one end of the gas section being connected and communicating with the peripheral wall of the second straight section, the gas section being located on the side of the extension section away from the inlet section, and the end of the gas section away from the second straight section being connected to the gas outlet.

[0013] In some embodiments of this utility model, along the length direction of the second straight segment, the minimum distance between the gas segment and the extension segment is ΔH, the inner diameter of the inlet segment is D1, and satisfies: 0.2D1≤ΔH≤2D1.

[0014] In some embodiments of this utility model, when there are multiple Tesla valve units, the end of the inlet segment of one Tesla valve unit away from the first straight segment and the end of the second straight segment of the other Tesla valve unit away from the inlet segment are connected. The end of the second straight segment of the Tesla valve unit near the first inlet / outlet is connected to the first inlet / outlet. The end of the inlet segment of the Tesla valve unit near the second inlet / outlet is connected to the second inlet / outlet.

[0015] In some embodiments of this utility model, in the gas-liquid separator, the inner diameter of the inlet section is D1, and satisfies: 5mm≤D1≤12mm; and / or, the inner diameter of the inlet section is D1, the length of the inlet section is L1, and satisfies: 5D1≤L1≤10D1; and / or, the outer diameter of the arc segment is R1, the inner diameter of the inlet section is D1, and satisfies: 1.5D1≤R1≤4D1; and / or, the included angle between the first straight segment and the second straight segment is α1, and satisfies: 20°≤α1≤60°; and / or, the included angle between the extension segment and the second straight segment is θ1, and satisfies: 140°≤θ1≤175°.

[0016] In some embodiments of this utility model, in the control valve, the inlet section of one of any two adjacent Tesla valve units is connected to the end of the second straight section of the other Tesla valve unit that is away from the inlet section; the end of the second straight section of the Tesla valve unit near the gas outlet is connected to the gas outlet; and the end of the inlet section of the Tesla valve unit near the first total inlet / outlet is connected to the first total inlet / outlet.

[0017] In some embodiments of this utility model, in the control valve, the inner diameter of the inlet section is D2, and satisfies: 1mm≤D2≤7mm; and / or, the number of Tesla valve units is 4-20; and / or, the length of the inlet section is L2, and satisfies: 2mm≤L2≤10mm; and / or, the included angle between the first straight segment and the second straight segment is α2, and satisfies: 30°≤α2≤80°; and / or, the included angle between the extension segment and the second straight segment is θ2, and satisfies: 150°≤θ2≤175°; and / or, the outer diameter of the arc segment is R2, and the inner diameter of the inlet section is D2, and satisfies: 1.5D≤R2≤4D2.

[0018] In some embodiments of this utility model, the entry segment and the first straight segment are parallel.

[0019] In some embodiments of this utility model, the heat exchange flow path is multiple and includes a first flow path and a second flow path. The gas-liquid separator is disposed on the heat exchange flow path. The first flow path is connected to the first total inlet and outlet and the first inlet and outlet respectively. The second flow path is connected to the second total inlet and outlet and the second inlet and outlet respectively. At least one of the first flow path and the second flow path includes multiple sub-flow paths arranged in parallel.

[0020] In some embodiments of this utility model, the gas-liquid separator is located between the heat exchange flow path and the second total inlet and outlet. The heat exchange flow path is multiple and includes a first flow path and a second flow path. The first flow path includes a first sub-flow path and a second sub-flow path connected in parallel. The second flow path includes a third sub-flow path and a fourth sub-flow path connected in parallel. The first sub-flow path is connected to the first total inlet and outlet and the third sub-flow path, respectively. The second sub-flow path is connected to the first total inlet and outlet and the fourth sub-flow path, respectively. The third sub-flow path and the fourth sub-flow path are connected to the first inlet and outlet, respectively.

[0021] In some embodiments of this utility model, the first sub-flow path is one or multiple sub-flow paths arranged in parallel. When there are multiple first sub-flow paths, the heat exchange tubes of the multiple first sub-flow paths are arranged in the height direction of the heat exchanger; and / or, the second sub-flow path is one or multiple sub-flow paths arranged in parallel. When there are multiple second sub-flow paths, the heat exchange tubes of the multiple second sub-flow paths are arranged in the height direction of the heat exchanger.

[0022] In some embodiments of this utility model, the heat exchange tubes of the first flow path and the heat exchange tubes of the second flow path are arranged along the height direction of the heat exchanger.

[0023] The air conditioner according to an embodiment of the present invention includes the heat exchanger described above.

[0024] According to an embodiment of the present invention, an air conditioner is provided with a heat exchanger. The heat exchanger body has a heat exchange flow path and a first main inlet and a second main inlet and a third inlet connected to the heat exchange flow path. A gas-liquid separator includes a first inlet and a second inlet and a gas outlet. The gas outlet is connected to the first main inlet and a third inlet via the gas-liquid separator, which includes at least one Tesla valve unit. The gas outlet is located between the heat exchange flow path and the second main inlet and a third inlet. The first inlet and a third inlet are connected to the heat exchange flow path, and the second inlet and a third inlet are connected to the second main inlet and a third inlet. Alternatively, the gas-liquid separator is located on the heat exchange flow path, and the first inlet and a third inlet are respectively connected to the heat exchange flow path. This reduces the dryness of the flowing medium entering the heat exchange flow path and improves the heat exchange efficiency of the air conditioner. Simultaneously, the Tesla valve unit, as a non-moving part, effectively eliminates mechanical wear and noise caused by the movement of the mechanical valve body structure, reduces system low-pressure drop losses, and improves the reliability of the heat exchanger. In addition, by integrating the gas-liquid separator into the heat exchange flow path, the gas-liquid separator has the advantages of small size, small volume and low cost, achieving compactness and lightweight. Moreover, the Tesla valve unit does not need to store a lot of refrigerant, effectively solving the defect of high power consumption during air conditioner cooling operation caused by increased refrigerant charge.

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a heat exchanger according to an embodiment of the present utility model; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 yes Figure 1 Enlarged view at point B in the middle; Figure 4 This is a schematic diagram of the structure of a heat exchanger according to another embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a heat exchanger according to another embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a heat exchanger according to another embodiment of the present invention; Figure 7 This is a simulated velocity cloud diagram of the Tesla valve unit in the gas-liquid separator according to an embodiment of the present invention; Figure 8 This is a cloud map showing the distribution of gaseous medium within the Tesla valve unit of the gas-liquid separator according to an embodiment of the present invention; Figure 9 This is a cloud map showing the distribution of liquid medium within the Tesla valve unit of the gas-liquid separator according to an embodiment of the present invention.

[0027] Figure label: 100. Heat exchanger; 1. Heat exchanger body; 11. First main inlet / outlet; 12. Second main inlet / outlet; 13. Heat exchange flow path; 131. First flow path; 1311. First sub-flow path; 1312. Second sub-flow path; 132. Second flow path; 1321. Third sub-flow path; 1322. Fourth sub-flow path; 2. Gas-liquid separator; 21. First inlet / outlet; 22. Second inlet / outlet; 23. Gas outlet; 3. Control valve; 31. Check valve; 4. Tesla valve unit; 41. Inlet section; 42. Arc section; 43. Connecting section; 431. Second straight section; 432. Extension section; 44. First straight section; 45. Gas section. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] The heat exchanger 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0032] like Figure 1 and Figures 4-6 As shown, the heat exchanger 100 according to an embodiment of the present invention is used in an air conditioner. The heat exchanger 100 includes a heat exchanger body 1 and a gas-liquid separator 2.

[0033] The heat exchanger body 1 has a heat exchange flow path 13 and a first total inlet / outlet 11 and a second total inlet / outlet 12 connected to the heat exchange flow path 13. Thus, the flowing medium (refrigerant) enters the heat exchange flow path 13 from one of the first total inlet / outlet 11 and the second total inlet / outlet 12, exchanges heat with the heat exchange flow path 13, and then flows out from the other. This ensures that when the heat exchanger 100 is an outdoor heat exchanger 100, it can function as an evaporator in heating mode and a condenser in cooling mode; and when the heat exchanger 100 is an indoor heat exchanger 100, it can function as an evaporator in cooling mode and a condenser in heating mode.

[0034] Since the Tesla valve unit 4 is a special pipe that can achieve the function of a valve, its special feature is that although it has no moving parts, it can effectively suppress backflow by relying on the geometric structure of the flow channel. When the fluid flows in reverse into the Tesla valve unit 4, due to the large difference in physical properties such as density and viscosity between the gaseous and liquid flow media, it continuously splits, converges and collides within the Tesla valve unit 4, resulting in a large difference in collision loss between the gaseous and liquid flow media, thereby achieving the separation of the gaseous and liquid flow media.

[0035] Specifically, the gas-liquid separator 2 includes a first inlet / outlet 21, a second inlet / outlet 22, and a gas outlet 23. The gas-liquid separator 2 includes at least one Tesla valve unit 4, so that the flowing medium entering the gas-liquid separator 2 from the second inlet / outlet 22 is separated into gas and liquid by the Tesla valve unit 4, and the separated gaseous medium flows out from the gas outlet 23, while the gas-liquid mixed medium flows out from the first inlet / outlet 21.

[0036] When the gas-liquid separator 2 is located between the heat exchange flow path 13 and the second total inlet and outlet 12, the gas outlet 23 is connected to the first total inlet and outlet 11, the first inlet and outlet 21 is connected to the heat exchange flow path 13, and the second inlet and outlet 22 is connected to the second total inlet and outlet 12. When the heat exchanger 100 is used as an evaporator, the gas-liquid mixed medium enters the gas-liquid separator 2 from the second total inlet and outlet 12 through the second inlet and outlet 22 and is separated into gas and liquid by the Tesla valve unit 4. The gaseous medium flows out from the first total inlet and outlet 11 through the gas outlet 23, and the gas-liquid mixed medium flows into the heat exchange flow path 13 from the first inlet and outlet 21 for heat exchange and then flows out from the first total inlet and outlet 11.

[0037] When the gas-liquid separator 2 is installed on the heat exchange flow path 13, the gas outlet 23 is connected to the first total inlet and outlet 11, and the first inlet and outlet 21 and the second inlet and outlet 22 are respectively connected to the heat exchange flow path 13. When the heat exchanger 100 is used as an evaporator, the gas-liquid mixed medium enters part of the heat exchange flow path 13 from the second total inlet and outlet 12 for heat exchange, and then enters the gas-liquid separator 2 from the second inlet and outlet 22. After gas-liquid separation by the Tesla valve unit 4, the gaseous medium flows out from the first total inlet and outlet 11 through the gas outlet 23, and the gas-liquid mixed medium flows into the remaining heat exchange flow path 13 from the first inlet and outlet 21 for heat exchange and then flows out from the first total inlet and outlet 11.

[0038] Therefore, the Tesla valve unit 4 of the gas-liquid separator 2 achieves gas-liquid separation of the gas-liquid mixture, thereby reducing the amount of gaseous medium flowing from the first inlet / outlet 21 to the heat exchange path 13, lowering the dryness of the flowing medium entering the heat exchange path 13, effectively preventing excessive gaseous medium from affecting the evaporation effect of the liquid medium in the evaporator, and effectively preventing excessive gaseous medium from increasing the pressure drop loss in the heat exchange tubes of the heat exchanger 100, thus improving the heat exchange efficiency of the heat exchanger 100 and ensuring the heat exchange effect of the heat exchanger 100. At the same time, as a non-moving part, the Tesla valve unit 4 effectively eliminates mechanical wear and noise caused by the movement of the mechanical valve body structure while achieving gas-liquid separation, and reduces the system's low pressure drop loss, improving the reliability of the heat exchanger 100.

[0039] Compared to existing gas-liquid separators, which suffer from drawbacks such as large volume, high space requirements in the outdoor unit enclosure, and high cost, as well as the storage of a significant amount of refrigerant within the separator, leading to increased refrigerant charge and higher power consumption during cooling operation, the gas-liquid separator 2 of this application integrates gas-liquid separation into the heat exchange flow path 13 via a Tesla valve unit 4. This results in a smaller size, lower volume, and lower cost. Furthermore, the Tesla valve unit 4 eliminates the need for refrigerant storage, effectively addressing the issue of increased refrigerant charge leading to higher power consumption during cooling operation. Simultaneously, the integration of the gas-liquid separator 2 into the heat exchange flow path 13 effectively reduces pipe length and shortens the refrigerant flow path, achieving both compactness and weight reduction while further improving heat exchange efficiency.

[0040] Furthermore, when the gas-liquid separator 2 is located between the heat exchange flow path 13 and the second total inlet and outlet 12, the gas outlet 23 is connected to the first total inlet and outlet 11, the first inlet and outlet 21 is connected to the heat exchange flow path 13, and the second inlet and outlet 22 is connected to the second total inlet and outlet 12. When the heat exchanger 100 acts as a condenser, the flowing medium enters the heat exchange flow path 13 from the first total inlet and outlet 11 and exchanges heat with the heat exchange flow path 13. After the flowing medium enters the gas-liquid separator 2 from the heat exchange flow path 13 through the first inlet and outlet 21 and flows out from the second total inlet and outlet 12 through the second inlet and outlet 22.

[0041] When the gas-liquid separator 2 is installed on the heat exchange flow path 13, the gas outlet 23 is connected to the first total inlet and outlet 11, and the first inlet and outlet 21 and the second inlet and outlet 22 are respectively connected to the heat exchange flow path 13. When the heat exchanger 100 is used as a condenser, the gas-liquid mixed medium enters part of the heat exchange flow path 13 from the first total inlet and outlet 11 and exchanges heat with the heat exchange flow path 13. The flowing medium flows from the heat exchange flow path 13 through the first inlet and outlet 21 into the gas-liquid separator 2 and through the second inlet and outlet 22 into the remaining heat exchange flow path 13 for heat exchange. After heat exchange, it flows out from the second total inlet and outlet 12.

[0042] According to an embodiment of the present invention, the heat exchanger 100 has a heat exchange flow path 13 and a first total inlet / outlet 11 and a second total inlet / outlet 12 connected to the heat exchange flow path 13. The gas-liquid separator 2 includes a first inlet / outlet 21, a second inlet / outlet 22, and a gas outlet 23. The gas-liquid separator 2 includes at least one Tesla valve unit 4. The gas outlet 23 is connected to the first total inlet / outlet 11. The gas-liquid separator 2 is located between the heat exchange flow path 13 and the second total inlet / outlet 12. The first inlet / outlet 21 is connected to the heat exchange flow path 13, and the second inlet / outlet 22 is connected to the second total inlet / outlet 12. Alternatively, the gas-liquid separator 2 is disposed on the heat exchange flow path 13, with the first inlet / outlet 21 and the second inlet / outlet 22 respectively connected to the heat exchange flow path 13. This reduces the dryness of the flowing medium entering the heat exchange flow path 13 and improves the heat exchange efficiency of the heat exchanger 100. Simultaneously, the Tesla valve unit 4, as a non-moving part, effectively eliminates mechanical wear and noise caused by the movement of the mechanical valve body structure, reduces system low-pressure drop losses, and improves the reliability of the heat exchanger 100. In addition, by integrating the gas-liquid separator 2 into the heat exchange flow path 13, the gas-liquid separator 2 has the effects of small size, small volume and low cost, achieving compactness and lightweight. Moreover, the Tesla valve unit 4 does not need to store a lot of refrigerant, effectively solving the defect of high power consumption during air conditioner cooling operation caused by increased refrigerant charge.

[0043] In some embodiments of this utility model, such as Figure 1 and Figures 4-6 As shown, the heat exchanger 100 also includes a control valve 3. The control valve 3 is connected in series between the first main inlet / outlet 11 and the gas outlet 23. Thus, the control valve 3 can connect and disconnect the first main inlet / outlet 11 and the gas outlet 23. Specifically, when the heat exchanger 100 functions as an evaporator, the control valve 3 connects the gas outlet 23 to the first main inlet / outlet 11, allowing the gaseous medium to flow from the gas outlet 23 through the control valve 3 to the first main inlet / outlet 11. When the heat exchanger 100 functions as a condenser, the control valve 3 disconnects the gas outlet 23 from the first main inlet / outlet 11, ensuring that all the flowing medium entering from the first main inlet / outlet 11 flows into the heat exchange path 13, improving the reliability of the heat exchanger 100.

[0044] In some embodiments of this utility model, such as Figure 4 and Figure 6 As shown, control valve 3 is a one-way valve 31 that only allows the flowing medium to flow from gas outlet 23 to the first total inlet / outlet 11. Therefore, by controlling valve 3 as a one-way valve 31 and allowing the flowing medium to flow only from gas outlet 23 to the first total inlet / outlet 11, when the heat exchanger 100 is used as an evaporator, the gaseous medium can flow from gas outlet 23 through one-way valve 31 to the first total inlet / outlet 11. When the heat exchanger 100 is used as a condenser, the flowing medium entering from the first total inlet / outlet 11 can all flow into the heat exchange flow path 13, ensuring the reliability of the heat exchanger 100.

[0045] In some embodiments of this utility model, such as Figure 1 and Figure 5 As shown, the resistance of the fluid passing through the control valve 3 in the direction from the gas outlet 23 to the first total inlet / outlet 11 is the first resistance, and the resistance of the fluid passing through the control valve 3 in the direction from the first total inlet / outlet 11 to the gas outlet 23 is the second resistance. The first resistance is greater than the second resistance. Therefore, by ensuring that the first resistance is greater than the second resistance, the control valve 3 only allows the flowing medium to flow from the gas outlet 23 to the first total inlet / outlet 11. When the heat exchanger 100 is used as an evaporator, the gaseous medium can flow from the gas outlet 23 through the one-way valve 31 to the first total inlet / outlet 11. When the heat exchanger 100 is used as a condenser, the flowing medium entering from the first total inlet / outlet 11 can all flow into the heat exchange flow path 13, ensuring the reliability of the heat exchanger 100.

[0046] In some embodiments of this utility model, such as Figure 1 and Figure 5 As shown, the control valve 3 includes multiple Tesla valve units 4. It is understandable that, since the Tesla valve unit 4 is a special conduit capable of functioning as a valve, its unique characteristic lies in the fact that although it has no moving parts, it can effectively suppress backflow through the geometry of the flow channel. When fluid flows forward into the Tesla valve unit 4, the fluid flows primarily along the central direct flow channel; however, when flowing backward, the fluid needs to continuously navigate around the arc-shaped branch flow channel, resulting in a significant increase in flow resistance.

[0047] Therefore, by controlling valve 3, which includes multiple Tesla valve units 4, fluid flows into Tesla valve unit 4 in the reverse direction from gas outlet 23 to the first total inlet / outlet 11 so that the resistance of the control valve 3 is the first resistance. In the forward direction from the first total inlet / outlet 11 to gas outlet 23, fluid flows into Tesla valve unit 4 so that the resistance of the fluid passing through the control valve 3 is the second resistance. This achieves the first resistance being greater than the second resistance, so that control valve 3 only allows the flowing medium to flow from gas outlet 23 to the first total inlet / outlet 11. When heat exchanger 100 is used as an evaporator, gaseous medium can flow from gas outlet 23 through check valve 31 to the first total inlet / outlet 11. When heat exchanger 100 is used as a condenser, the flowing medium entering from the first total inlet / outlet 11 can all flow into the heat exchange flow path 13, ensuring the reliability of heat exchanger 100.

[0048] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, in the gas-liquid separator 2, the Tesla valve unit 4 includes an inlet section 41, an arc section 42, a connecting section 43, and a first straight section 44. The connecting section 43 includes a second straight section 431 and an extension section 432. The two ends of the arc section 42 in the length direction are connected to one end of the extension section 432 and one end of the first straight section 44, respectively. The end of the extension section 432 away from the arc section 42 is connected to and communicates with the peripheral wall of the second straight section 431. The inlet section 41 is connected to one end of the first straight section 44 away from the arc section 42 and one end of the second straight section 431. The end of the second straight section 431 away from the inlet section 41 is connected to the gas outlet 23 and the first inlet / outlet 21. The end of the inlet section 41 away from the first straight section 44 is connected to the second inlet / outlet 22.

[0049] Therefore, when the heat exchanger 100 is an evaporator, the fluid medium flows in from the inlet section 41 and is split at the connection between the first straight section 44 and the second straight section 431 into the first straight section 44 and the second straight section 431. The fluid medium in the first straight section 44 flows into the extension section 432 and the second straight section 431 through the arc section 42 and merges and collides with the fluid medium in the extension section 432 and the second straight section 431. Since the liquid medium has a higher density, the energy loss after the collision is greater, while the gaseous medium has a lower density, and the energy loss after the collision is lower. Thus, the gaseous medium and the liquid medium are separated at the end of the second straight section 431 away from the inlet section 41, so that the gaseous medium flows out from the gas outlet 23 and the first inlet and outlet 21 respectively, and the liquid medium flows out from the first inlet and outlet 21. In addition, the flowing medium entering the gas-liquid separator 2 from the second inlet and outlet 22 is separated into gas and liquid by the Tesla valve unit 4, and the separated gaseous medium flows out from the gas outlet 23, and the gas-liquid mixed medium flows out from the first inlet and outlet 21.

[0050] Specifically, in the experiment of the utility model, air and water were mixed in equal proportions and flowed into the Tesla valve unit 4 from the inlet section 41, from the simulated cloud. Figure 7 It can be seen that after air and water are mixed in equal proportions, they are diverted at the junction of the first straight segment 44 and the second straight segment 431 into the first straight segment 44 and the second straight segment 431 (which can also be understood as...). Figure 2 (Flow splits at angle α1), the fluid medium in the first straight segment 44 flows into the extension segment 432 and the second straight segment 431 via the arc segment 42, and merges and collides with the fluid medium in the extension segment 432 and the second straight segment 431 (which can also be understood as...) Figure 2 After the collision at angle θ1, most of the gaseous medium flows out from gas outlet 23, while the remaining gaseous medium and all liquid medium flow out from the first inlet and outlet 21. Simultaneously, from... Figure 8 It can be seen that ( Figure 8 Phase 1 is air), the gaseous medium portion flows out from gas outlet 23, and the remaining gaseous medium flows out from the first outlet. Figure 9 It can be seen that ( Figure 9 (Phase 2 is water), and all liquid media flow out from the first inlet / outlet 21.

[0051] When the evaporator is a condenser, the fluid medium flows from the first inlet / outlet 21 into the second straight section 431 and then into the inlet section 41. After that, the fluid medium flows from the inlet section 41 to the second inlet / outlet 22 and then out of the gas-liquid separator 2. Since the fluid medium in the gas-liquid separator 2 only flows along the length of the second straight section 431, the forward conduction function of the Tesla valve unit 4 is realized. At this time, the heat exchange effect is almost unaffected compared to the heat exchange flow path 13 of the heat exchanger 100 without the gas-liquid separator 2.

[0052] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, in the gas-liquid separator 2, the Tesla valve unit 4 also includes a gas section 45. The gas section 45 is parallel to the first straight section 44, one end of the gas section 45 is connected to and communicates with the peripheral wall of the second straight section 431, the gas section 45 is located on the side of the extension section 432 away from the inlet section 41, and the end of the gas section 45 away from the second straight section 431 is connected to the gas outlet 23.

[0053] Therefore, the separated gaseous medium flows into the gas section 45 through the second straight section 431 and then towards the gas outlet 23, ensuring that the separated gaseous medium can flow out from the gas outlet 23. This reduces the dryness of the flowing medium entering the heat exchange path 13 and improves the heat exchange efficiency of the heat exchanger 100. Simultaneously, the parallel alignment of the gas section 45 and the first straight section 44 further ensures that the separated gaseous medium flows smoothly into the gas section 45, effectively reducing the flow resistance of the gaseous medium and further improving the gas-liquid separation effect of the gas-liquid separator 2.

[0054] In some embodiments of this utility model, such as Figure 2 As shown, in the gas-liquid separator 2, along the length of the second straight segment 431, the minimum distance between the gas segment 45 and the extension segment 432 is ΔH, and the inner diameter of the inlet segment 41 is D1, which satisfies: 0.2D1≤ΔH≤2D1.

[0055] Understandably, along the length of the second straight segment 431, the minimum distance between the gas segment 45 and the extension segment 432 needs to be as small as possible to effectively prevent the gaseous and liquid media already in the second straight segment 431 from mixing again, and to ensure that the separated gaseous media flows into the gas segment 45 as much as possible. Therefore, along the length of the second straight segment 431, by limiting the minimum distance between the gas segment 45 and the extension segment 432 to ΔH, and the inner diameter of the inlet segment 41 to D1, and satisfying: ΔH≤2D1, the gas-liquid separation effect of the gas-liquid separator 2 is guaranteed.

[0056] Since the gas section 45 and the extension section 432 are respectively connected to the second straight section 431, and the gas section 45 is parallel to the first straight section 44, the gas section 45 cannot be directly connected to the extension section 432. A transition section with a distance of ΔH is required to connect the two. However, if the size of the transition section is too small, it will affect the overall structural strength. Therefore, along the length direction of the second straight section 431, by limiting the minimum distance between the gas section 45 and the extension section 432 to ΔH, and setting the inner diameter of the inlet section 41 to D1, while satisfying 0.2D1≤ΔH, the overall structural strength is guaranteed and the reliability of the gas-liquid separator 2 is improved.

[0057] It should be noted that the minimum distance ΔH between the gas segment 45 and the extension segment 432 along the length direction of the second straight segment 431 can be 0.2D1, 0.4D1, 0.6D1, 0.8D1, D1, 1.2D1, 1.4D1, 1.6D1, 1.8 or 2D1.

[0058] In some embodiments of this utility model, such as Figure 1 and Figure 2As shown, in the gas-liquid separator 2, when there are multiple Tesla valve units 4, the end of the inlet segment 41 of any two adjacent Tesla valve units 4 that is away from the first straight segment 44 is connected to the end of the second straight segment 431 of the other Tesla valve unit 4 that is away from the inlet segment 41. The end of the second straight segment 431 of the Tesla valve unit 4 that is close to the first inlet / outlet 21 is connected to the first inlet / outlet 21. The end of the inlet segment 41 of the Tesla valve unit 4 that is close to the second inlet / outlet 22 is connected to the second inlet / outlet 22.

[0059] Understandably, when the heat exchanger 100 is an evaporator, the fluid medium flowing into the gas-liquid separator 2 from the second inlet / outlet 22 first enters the inlet section 41 of the Tesla valve unit 4 closest to the second inlet / outlet 22, and flows through the inlet section 41 to the junction of the first straight section 44 and the second straight section 431, where it is divided into the first straight section 44 and the second straight section 431. The fluid medium in the first straight section 44 flows through the arc section 42 into the extension section 432 and the second straight section 431, where it merges with the extension section 432 and the second straight section 431. The fluid media within section 1 converge and collide, achieving gas-liquid separation at the end of the second straight section 431 away from the inlet section 41. The separated gaseous media flows through the gas section 45 to the gas outlet 23, while the remaining gaseous and liquid media flow from the end of the second straight section 431 away from the inlet section 41 into the inlet section 41 of the next Tesla valve unit 4 for gas-liquid separation again, until the fluid media flows to the inlet section 41 of the Tesla valve unit 4 closest to the first inlet / outlet 21 for the final gas-liquid separation.

[0060] Therefore, by performing gas-liquid separation multiple times through multiple Tesla valve units 4, the amount of gaseous medium in the flowing medium from the first inlet / outlet 21 to the heat exchange path 13 is reduced, the dryness of the flowing medium entering the heat exchange path 13 is reduced, and excessive gaseous medium is effectively prevented from affecting the evaporation effect of the liquid medium in the evaporator, and excessive gaseous medium is also effectively prevented from increasing the pressure drop loss in the heat exchange tubes of the heat exchanger 100, thereby improving the heat exchange efficiency of the heat exchanger 100 and ensuring the heat exchange effect of the heat exchanger 100.

[0061] When the heat exchanger 100 is a condenser, the fluid medium flows from the first inlet / outlet 21 into the second straight section 431 of the Tesla valve unit 4 closest to the first inlet / outlet 21, and flows along the length of the second straight section 431 into the inlet section 41 of the next Tesla valve unit 4, and enters the second straight section 431 from the inlet section 41 until the fluid medium flows to the inlet section 41 of the Tesla valve unit 4 closest to the second inlet / outlet 22. After flowing from the inlet section 41 to the second inlet / outlet 22, it flows out of the gas-liquid separator 2. Since the fluid medium in the gas-liquid separator 2 only flows along the length of the second straight section 431 and the inlet section 41, the forward conduction function of the Tesla valve unit 4 is realized. At this time, the heat exchange effect is almost unaffected compared to the heat exchange flow path 13 of the heat exchanger 100 without the gas-liquid separator 2.

[0062] Optionally, the gas-liquid separator 2 may include 2, 3, 4 or 5 or more Tesla valve units 4.

[0063] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, in the gas-liquid separator 2, the inner diameter of the inlet section 41 is D1, and it satisfies the condition: 5mm ≤ D1 ≤ 12mm. It is understandable that if the inner diameter of the inlet section 41 is too small, the fluid velocity is forced to increase during reverse flow, easily inducing turbulence; conversely, if the inner diameter of the inlet section 41 is too large, the fluid cannot form an effective vortex, resulting in insufficient pressure loss. Therefore, by limiting the inner diameter of the inlet section 41 to 5mm-12mm, the pressure of the fluid medium flowing within the Tesla valve unit 4 is ensured, improving the reliability of the gas-liquid separator 2.

[0064] It should be noted that the inner diameter of the inlet section 41 can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm or 12mm.

[0065] Furthermore, on the projection plane perpendicular to the axis of the arc segment 42, the inlet segment 41 is rectangular with an inner diameter of 5mm-12mm. On the projection plane perpendicular to the axis of the arc segment 42, the inlet segment 41 is square. The inner diameter of the inlet segment 41 is calculated using the equivalent diameter (de=4*cross-sectional area / wet perimeter).

[0066] In some embodiments of this utility model, such as Figure 1 and Figure 2As shown, in the gas-liquid separator 2, the inner diameter of the inlet section 41 is D1, and the length of the inlet section 41 is L1, satisfying: 5D1≤L1≤10D1. It can be understood that when the heat exchanger 100 is an evaporator, the fluid medium enters the Tesla valve unit 4 from the inlet section 41. Its core function is to guide the fluid medium smoothly from the external pipe into the Tesla valve single ring and ensure that the fluid medium forms a stable flow state before the first straight section 44 and the second straight section 431. Therefore, the longer the length of the inlet section 41, the better, within permissible limits. However, an excessively long inlet section 41 will result in a large structural volume of the Tesla valve unit 4, leading to a large volume of both the gas-liquid separator 2 and the heat exchanger 100, which is detrimental to miniaturization. Therefore, by limiting the length of the inlet section 41 to 5D1-10D1, the reliability of the gas-liquid separator 2 is improved.

[0067] It should be noted that the length of the inlet segment 41 can be 5D1, 6D1, 7D1, 8D1, 9D1 or 10D1.

[0068] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, in the gas-liquid separator 2, the outer diameter of the arc segment 42 is R1, and the inner diameter of the inlet segment 41 is D1, satisfying: 1.5D1≤R1≤4D1. It is understandable that if the outer diameter of the arc segment 42 is too small, the fluid medium needs to change direction drastically when turning, leading to a significant increase in local pressure loss. Conversely, if the outer diameter of the arc segment 42 is too large, the flow channel turns too gently, making it difficult for the fluid to form effective vortices and dissipate energy. Therefore, by limiting the outer diameter of the arc segment 42 to between 1.5D1 and 4D1, the overall reliability of the Tesla valve unit 4 in the gas-liquid separator 2 is improved.

[0069] It should be noted that the outer diameter of the arc segment 42 can be 1.5D1, 2D1, 2.5D1, 3D1, 3.5D1 or 4D1.

[0070] In some embodiments of this utility model, such as Figure 2 As shown, in the gas-liquid separator 2, the included angle between the first straight segment 44 and the second straight segment 431 is α1, and satisfies: 20°≤α1≤60°. It can be understood that the fluid medium in the inlet segment 41 is diverted at the junction of the first straight segment 44 and the second straight segment 431, or it can be understood that the fluid medium in the inlet segment 41 is diverted at angle α1. Therefore, by limiting the included angle between the first straight segment 44 and the second straight segment 431, the proportion of fluid medium flowing into the first straight segment 44 and the second straight segment 431 is controlled, thereby ensuring the gas-liquid separation effect achieved by the subsequent fluid medium merging and colliding, and improving the gas-liquid separation effect of the Tesla valve unit 4 in the gas-liquid separator 2.

[0071] It should be noted that the included angle between the first straight line segment 44 and the second straight line segment 431 can be 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55° or 60°.

[0072] In some embodiments of this utility model, such as Figure 2 As shown, in the gas-liquid separator 2, the included angle between the extension section 432 and the second straight section 431 is θ1, and satisfies: 140°≤θ1≤175°. It can be understood that the fluid medium in the inlet section 41 is diverted at the connection between the first straight section 44 and the second straight section 431 into the first straight section 44 and the second straight section 431. The fluid medium in the first straight section 44 flows into the extension section 432 and the second straight section 431 via the arc section 42, merging and colliding with the fluid medium in the extension section 432 and the second straight section 431. This can also be understood as gas-liquid separation after merging and colliding at angle θ1. Most of the gaseous medium flows out from the gas outlet 23, while the remaining gaseous medium and all the liquid medium flow out from the first inlet and outlet 21. Therefore, by limiting the included angle between the extension section 432 and the second straight section 431, the merging and collision of the fluid medium ensures the gas-liquid separation effect, improving the gas-liquid separation effect of the Tesla valve unit 4 in the gas-liquid separator 2.

[0073] It should be noted that the angle between the extension segment 432 and the second straight segment 431 can be 140°, 145°, 150°, 155°, 160°, 165°, 170° or 175°.

[0074] In some embodiments of this utility model, such as Figure 1 and Figure 3 As shown, in the control valve 3, the Tesla valve unit 4 includes an inlet section 41, an arc section 42, a connecting section 43, and a first straight section 44. The connecting section 43 includes a second straight section 431 and an extension section 432. The two ends of the arc section 42 in the length direction are connected to one end of the extension section 432 and one end of the first straight section 44, respectively. The end of the extension section 432 away from the arc section 42 is connected to and communicates with the peripheral wall of the second straight section 431. The inlet section 41 is connected to one end of the first straight section 44 away from the arc section 42 and one end of the second straight section 431. The end of the second straight section 431 away from the inlet section 41 is connected to the gas outlet 23. The end of the inlet section 41 away from the first straight section 44 is connected to the first total inlet / outlet 11.

[0075] It is understandable that, in the direction from gas outlet 23 to the first total inlet / outlet 11, the fluid flows forward within the Tesla valve unit 4. The gas medium enters the second straight section 431 of the Tesla valve unit 4 closest to gas outlet 23 from gas outlet 23 and flows along the length of the second straight section 431 into the inlet section 41 of the next Tesla valve unit 4. It then enters the second straight section 431 from the inlet section 41 until the gas medium flows to the inlet section 41 of the Tesla valve unit 4 closest to the first total inlet / outlet 11 and flows from the inlet section 41 to the first total inlet / outlet 11.

[0076] In the direction from the first main inlet / outlet 11 to the gas outlet 23, the fluid flows in the opposite direction in the Tesla valve unit 4. The fluid medium entering the inlet section 41 from the first main inlet / outlet 11 is split into the first straight section 44 and the second straight section 431. The fluid medium in the first straight section 44 flows into the second straight section 431 and the extension section 432 after passing through the arc section 42. After colliding and merging, it flows into the inlet section 41 of the next Tesla valve unit 4 from the second straight section 431 and repeats the above cycle. At this time, the fluid needs to continuously go around the arc branch flow channel, continuously separate and collide, resulting in a significant increase in flow resistance.

[0077] Therefore, in the direction from gas outlet 23 to the first total inlet / outlet 11, the fluid flows into the Tesla valve unit 4 in the reverse direction so that the resistance of the control valve 3 is the first resistance. In the direction from the first total inlet / outlet 11 to gas outlet 23, the fluid flows into the Tesla valve unit 4 in the forward direction so that the resistance of the fluid passing through the control valve 3 is the second resistance. Thus, the first resistance is greater than the second resistance, so that the control valve 3 only allows the flowing medium to flow from gas outlet 23 to the first total inlet / outlet 11.

[0078] In some embodiments of this utility model, such as Figure 1 and Figure 3 As shown, in the control valve 3, the inlet section 41 of any two adjacent Tesla valve units 4 is connected to the end of the first straight section 44 away from the first straight section 44 and the end of the second straight section 431 of the other Tesla valve unit 4 away from the inlet section 41. The end of the second straight section 431 of the Tesla valve unit 4 near the gas outlet 23 is connected to the gas outlet 23. The end of the inlet section 41 of the Tesla valve unit 4 near the first total inlet / outlet 11 is connected to the first total inlet / outlet 11.

[0079] In some embodiments of this utility model, such as Figure 1 and Figure 3As shown, in control valve 3, the inner diameter of inlet section 41 is D2, and satisfies: 1mm ≤ D2 ≤ 7mm. It is understandable that if the inner diameter of inlet section 41 is too small, the fluid velocity is forced to increase during reverse flow, easily inducing turbulence; conversely, if the inner diameter of inlet section 41 is too large, the fluid cannot form effective vortices, resulting in insufficient pressure loss. Therefore, by limiting the inner diameter of inlet section 41 to 1mm-7mm, the pressure of the fluid medium flowing within Tesla valve unit 4 is ensured, improving the reliability of control valve 3.

[0080] It should be noted that the inner diameter of the inlet section 41 can be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm or 7mm.

[0081] Furthermore, on the projection plane perpendicular to the axis of the arc segment 42, the inlet segment 41 is rectangular with an inner diameter of 1mm-7mm. On the projection plane perpendicular to the axis of the arc segment 42, the inlet segment 41 is square. The inner diameter of the inlet segment 41 is calculated using the equivalent diameter (de=4*cross-sectional area / wet perimeter).

[0082] In some embodiments of this utility model, such as Figure 1 and Figure 3 As shown, the number of Tesla valve units 4 in control valve 3 ranges from 4 to 20. It is understandable that too few Tesla valve units 4 will not generate sufficient reverse resistance, resulting in poor shut-off performance. Conversely, too many Tesla valve units 4, while improving shut-off performance, will increase resistance during forward flow, affecting transmission efficiency. Therefore, by limiting the number of Tesla valve units 4 to 4-20, it is possible to ensure that Tesla valve units 4 possess both forward flow characteristics and large reverse pressure drop, thereby improving the reliability of control valve 3.

[0083] It should be noted that the number of Tesla valve units 4 can be 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20.

[0084] In some embodiments of this utility model, such as Figure 1 and Figure 3 As shown, in control valve 3, the length of inlet section 41 is L2, and satisfies: 2mm ≤ L2 ≤ 10mm. It is understandable that if the length of inlet section 41 is too short, it will not be possible to connect two adjacent Tesla valve units 4, while if the length of inlet section 41 is too long, it will reduce the unidirectional conductivity of Tesla valve unit 4 (unidirectional conductivity is the ratio of reverse pressure drop to forward pressure drop). Therefore, by limiting the length of inlet section 41 to 2mm-10mm, while ensuring that any two adjacent Tesla valve units 4 can be connected, the impact on the unidirectional conductivity of the controller is minimized, thus improving the reliability of the controller.

[0085] It should be noted that the length of the inlet section 41 can be 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm or 10mm.

[0086] In some embodiments of this utility model, such as Figure 3 As shown, in control valve 3, the included angle between the first straight segment 44 and the second straight segment 431 is α2, and satisfies: 30°≤α2≤80°. It can be understood that, in the direction from the first main inlet / outlet 11 to the gas outlet 23, the fluid medium in the inlet segment 41 is diverted at the connection between the first straight segment 44 and the second straight segment 431 into the first straight segment 44 and the second straight segment 431. Alternatively, it can be understood that the fluid medium in the inlet segment 41 is diverted at angle α1. In the direction from the gas outlet 23 to the first main inlet / outlet 11, the fluid medium in the second straight segment 431 flows along the length of the second straight segment 431 through the connection between the first straight segment 44 and the second straight segment 431 into the inlet segment 41.

[0087] Therefore, by limiting the included angle between the first straight segment 44 and the second straight segment 431, flow resistance is ensured in the direction from the first total inlet / outlet 11 to the gas outlet 23, and positive flow is ensured in the direction from the gas outlet 23 to the first total inlet / outlet 11, further ensuring that the control valve 3 only allows the flowing medium to flow from the gas outlet 23 to the first total inlet / outlet 11.

[0088] It should be noted that the included angle between the first straight line segment 44 and the second straight line segment 431 can be 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75° or 80°.

[0089] In some embodiments of this utility model, such as Figure 3 As shown, in control valve 3, the included angle between extension section 432 and the second straight section 431 is θ2, and satisfies: 150°≤θ2≤175°. It can be understood that, in the direction from the first main inlet / outlet 11 to the gas outlet 23, the fluid medium in inlet section 41 is diverted at the connection between the first straight section 44 and the second straight section 431 into the first straight section 44 and the second straight section 431. The fluid medium in the first straight section 44 flows into the extension section 432 and the second straight section 431 via the arc section 42, merging and colliding with the fluid medium in the extension section 432 and the second straight section 431. This can also be understood as gas-liquid separation after merging and colliding at angle θ1. In the direction from the gas outlet 23 to the first main inlet / outlet 11, the fluid medium in the second straight section 431 flows into the inlet section 41 along the length of the second straight section 431 through the connection between the extension section 432 and the second straight section 431.

[0090] Therefore, by limiting the included angle between the extension section 432 and the second straight section 431, flow resistance is ensured in the direction from the first total inlet / outlet 11 to the gas outlet 23, and positive flow is ensured in the direction from the gas outlet 23 to the first total inlet / outlet 11, further ensuring that the control valve 3 only allows the flowing medium to flow from the gas outlet 23 to the first total inlet / outlet 11.

[0091] It should be noted that the angle between the extension segment 432 and the second straight segment 431 can be 150°, 155°, 160°, 165°, 170° or 175°.

[0092] In some embodiments of this utility model, such as Figure 3 As shown, in control valve 3, the outer diameter of the arc segment 42 is R2, and the inner diameter of the inlet segment 41 is D2, satisfying: 1.5D≤R2≤4D2. It is understandable that if the outer diameter of the arc segment 42 is too small, the fluid medium needs to change direction drastically when turning, leading to a significant increase in local pressure loss. Conversely, if the outer diameter of the arc segment 42 is too large, the flow channel turns too gently, making it difficult for the fluid to form effective vortices and dissipate energy. Therefore, by limiting the outer diameter of the arc segment 42 to between 1.5D2 and 4D2, the overall reliability of the Tesla valve unit 4 in control valve 3 is improved.

[0093] It should be noted that the outer diameter of the arc segment 42 can be 1.5D2, 2D2, 2.5D2, 3D2, 3.5D2 or 4D2.

[0094] In some embodiments of this utility model, such as Figures 1-3 As shown, the inlet section 41 and the first straight section 44 are parallel. It can be understood that the fluid medium entering the inlet section 41 flows into the first straight section 44 and the second straight section 431 respectively. The fluid medium in the first straight section 44 flows into the second straight section 431 and the extension section 432 via the arc section 42. The parallelism between the inlet section 41 and the first straight section 44 ensures a stable ratio of fluid medium flowing from the inlet section 41 into the first straight section 44 and the second straight section 431, thus improving the reliability of the Tesla valve unit 4.

[0095] In some embodiments of this utility model, such as Figure 5 and Figure 6 As shown, the heat exchange flow path 13 is multiple and includes a first flow path 131 and a second flow path 132. The gas-liquid separator 2 is disposed on the heat exchange flow path 13. The first flow path 131 is connected to the first total inlet and outlet 11 and the first inlet and outlet 21 respectively. The second flow path 132 is connected to the second total inlet and outlet 12 and the second inlet and outlet 22 respectively. At least one of the first flow path 131 and the second flow path 132 includes multiple sub-flow paths arranged in parallel.

[0096] Therefore, when the heat exchanger 100 is an evaporator, the fluid medium flows into the second flow path 132 from the second main inlet / outlet 12 and exchanges heat with the second flow path 132. Then, the fluid medium flows from the second flow path 132 through the second inlet / outlet 22 into the gas-liquid separator 2. After gas-liquid separation by the Tesla valve unit 4 within the gas-liquid separator 2, the separated gaseous medium flows to the gas outlet 23 and out through the first main inlet / outlet 11. The gas-liquid mixed medium flows into the first flow path 131 from the first inlet / outlet 21 and exchanges heat with the first flow path 131 before flowing out from the first main inlet / outlet 11. This reduces the dryness of the fluid entering the first flow path 131 and improves the heat exchange efficiency of the heat exchanger 100.

[0097] When the heat exchanger 100 is a condenser, the fluid medium flows into the first flow path 131 from the first main inlet and outlet 11 and exchanges heat with the first flow path 131. Then, the fluid medium flows into the gas-liquid separator 2 from the first inlet and outlet 21 of the first flow path 131. The fluid medium in the gas-liquid separator 2 flows out of the gas-liquid separator 2 through the second inlet and outlet 22 and flows into the second flow path 132. After exchanging heat with the second flow path 132, the fluid medium flows out from the second main inlet and outlet 12.

[0098] In addition, at least one of the first flow path 131 and the second flow path 132 can be configured to include multiple sub-flow paths arranged in parallel, so that the heat exchanger 100 can meet different requirements and improve the versatility of the heat exchanger 100.

[0099] In some embodiments of this utility model, such as Figure 1 and Figure 4 As shown, the gas-liquid separator 2 is located between the heat exchange flow path 13 and the second main inlet and outlet 12. The heat exchange flow path 13 is multiple and includes a first flow path 131 and a second flow path 132. The first flow path includes a first sub-flow path 1311 and a second sub-flow path 1312 connected in parallel. The second flow path 132 includes a third sub-flow path 1321 and a fourth sub-flow path 1322 connected in parallel. The first sub-flow path 1311 is connected to the first main inlet and outlet 11 and the third sub-flow path 1321, respectively. The second sub-flow path 1312 is connected to the first main inlet and outlet 11 and the fourth sub-flow path 1322, respectively. The third sub-flow path 1321 and the fourth sub-flow path 1322 are connected to the first inlet and outlet 21, respectively.

[0100] Therefore, when the heat exchanger 100 is an evaporator, the fluid medium flows into the gas-liquid separator 2 from the second main inlet / outlet 12 and then into the gas-liquid separator 2 through the second inlet / outlet 22. After gas-liquid separation by the Tesla valve unit 4 in the gas-liquid separator 2, the separated gaseous medium flows to the gas outlet 23 and then flows out through the first main inlet / outlet 11. The gas-liquid mixed medium flows into the third sub-flow path 1321 and the fourth sub-flow path 1322 from the first inlet / outlet 21, respectively. After heat exchange with the third sub-flow path 1321, the fluid medium flows into the first sub-flow path 1311 and then flows out through the first main inlet / outlet 11. After heat exchange with the fourth sub-flow path 1322, the fluid medium flows into the second sub-flow path 1312 and then flows out through the first main inlet / outlet 11. Thus, the dryness of the fluid medium entering the first flow path 131 is reduced by the gas-liquid separator 2, thereby improving the heat exchange efficiency of the heat exchanger 100.

[0101] When the heat exchanger 100 is a condenser, the fluid medium flows from the first main inlet and outlet 11 into the first sub-flow path 1311 and the second sub-flow path 1312. After exchanging heat with the first sub-flow path 1311, the fluid medium flows into the third sub-flow path 1321 and exchanges heat with the third sub-flow path 1321 before flowing into the gas-liquid separator 2 from the first inlet and outlet 21. After exchanging heat with the second sub-flow path 1312, the fluid medium flows into the fourth sub-flow path 1322 and exchanges heat with the fourth sub-flow path 1322 before flowing into the gas-liquid separator 2 from the first inlet and outlet 21. The fluid medium in the gas-liquid separator 2 flows out of the gas-liquid separator 2 through the second inlet and outlet 22 and flows out from the second main inlet and outlet 12.

[0102] In some embodiments of this utility model, such as Figure 1 and Figure 4 As shown, there may be one or multiple first sub-flow paths 1311 arranged in parallel. When there are multiple first sub-flow paths 1311, the heat exchange tubes of the multiple first sub-flow paths 1311 are arranged in the height direction of the heat exchanger 100. Therefore, the first sub-flow paths 1311 can be configured as one or multiple in parallel according to requirements, so that the heat exchanger 100 can meet different needs and improve the versatility of the heat exchanger 100. At the same time, when there are multiple first sub-flow paths 1311, the arrangement of the heat exchange tubes of the multiple first sub-flow paths 1311 in the height direction of the heat exchanger 100 can more effectively utilize the space in the height direction of the heat exchanger 100, making the structure of the heat exchanger 100 more compact, reducing the volume occupied by the heat exchanger 100 in the air conditioner, and facilitating the miniaturization of the air conditioner.

[0103] In some embodiments of this utility model, such as Figure 1 and Figure 4As shown, there may be one or multiple second sub-flow paths 1312 arranged in parallel. When there are multiple second sub-flow paths 1312, the heat exchange tubes of the multiple second sub-flow paths 1312 are arranged in the height direction of the heat exchanger 100. Therefore, the second sub-flow paths 1312 can be configured as one or multiple in parallel according to requirements, so that the heat exchanger 100 can meet different needs and improve the versatility of the heat exchanger 100. At the same time, when there are multiple second sub-flow paths 1312, the arrangement of the heat exchange tubes of the multiple second sub-flow paths 1312 in the height direction of the heat exchanger 100 can more effectively utilize the space in the height direction of the heat exchanger 100, making the structure of the heat exchanger 100 more compact, reducing the volume occupied by the heat exchanger 100 in the air conditioner, and facilitating the miniaturization of the air conditioner.

[0104] In some embodiments of this utility model, such as Figure 1 and Figures 4-6 As shown, the heat exchange tubes of the first flow path 131 and the second flow path 132 are arranged along the height direction of the heat exchanger 100. Therefore, by arranging the heat exchange tubes of the first flow path 131 and the second flow path 132 along the height direction of the heat exchanger 100, the space of the heat exchanger 100 in the height direction can be utilized more effectively, making the structure of the heat exchanger 100 more compact, reducing the volume occupied by the heat exchanger 100 in the air conditioner, and facilitating the miniaturization of the air conditioner.

[0105] The following describes an air conditioner according to an embodiment of the present invention.

[0106] An air conditioner according to an embodiment of the present invention includes a heat exchanger 100.

[0107] According to an embodiment of the present invention, an air conditioner is provided with a heat exchanger 100. The heat exchanger body 1 has a heat exchange flow path 13 and a first total inlet / outlet 11 and a second total inlet / outlet 12 connected to the heat exchange flow path 13. A gas-liquid separator 2 includes a first inlet / outlet 21, a second inlet / outlet 22, and a gas outlet 23. The gas-liquid separator 2 includes at least one Tesla valve unit 4. The gas outlet 23 is connected to the first total inlet / outlet 11. The gas-liquid separator 2 is located between the heat exchange flow path 13 and the second total inlet / outlet 12. The first inlet / outlet 21 is connected to the heat exchange flow path 13, and the second inlet / outlet 22 is connected to the second total inlet / outlet 12. Alternatively, the gas-liquid separator 2 is disposed on the heat exchange flow path 13, and the first inlet / outlet 21 and the second inlet / outlet 22 are respectively connected to the heat exchange flow path 13, thereby reducing the dryness of the flowing medium entering the heat exchange flow path 13 and improving the heat exchange efficiency of the air conditioner. At the same time, the Tesla valve unit 4, as a non-moving part, effectively eliminates mechanical wear and noise caused by the movement of the mechanical valve body structure, and reduces the system's low pressure drop loss, thereby improving the reliability of the heat exchanger 100. In addition, by integrating the gas-liquid separator 2 into the heat exchange flow path 13, the gas-liquid separator 2 has the effects of small size, small volume and low cost, achieving compactness and lightweight. Moreover, the Tesla valve unit 4 does not need to store a lot of refrigerant, effectively solving the defect of high power consumption during air conditioner cooling operation caused by increased refrigerant charge.

[0108] It should be noted that this utility model includes, but is not limited to, heat pump inverter air conditioners with heating functions.

[0109] Other components of the air conditioner according to the embodiments of the present invention, such as the heat exchanger, and its operation are known to those skilled in the art and will not be described in detail here.

[0110] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0111] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A heat exchanger for use in an air conditioner, characterized in that, include: A heat exchanger body, the heat exchanger body having a heat exchange flow path and a first main inlet and a second main inlet and outlet connected to the heat exchange flow path; A gas-liquid separator, comprising a first inlet and outlet, a second inlet and outlet, and a gas outlet, wherein the gas outlet is connected to the first main inlet and outlet. The gas-liquid separator is located between the heat exchange flow path and the second total inlet and outlet, with the first inlet and outlet connected to the heat exchange flow path and the second inlet and outlet connected to the second total inlet and outlet; or, the gas-liquid separator is located on the heat exchange flow path, with the first inlet and outlet and the second inlet and outlet respectively connected to the heat exchange flow path.

2. The heat exchanger according to claim 1, characterized in that, Also includes: A control valve is connected in series between the first main inlet / outlet and the gas outlet.

3. The heat exchanger according to claim 2, characterized in that, The control valve is a one-way valve and only allows the flowing medium to flow from the gas outlet to the first total inlet / outlet.

4. The heat exchanger according to claim 2, characterized in that, The resistance of the fluid passing through the control valve in the direction from the gas outlet to the first total inlet / outlet is the first resistance, and the resistance of the fluid passing through the control valve in the direction from the first total inlet / outlet to the gas outlet is the second resistance. The first resistance is greater than the second resistance.

5. The heat exchanger according to claim 4, characterized in that, The control valve includes a plurality of the Tesla valve units.

6. The heat exchanger according to claim 2 or 5, characterized in that, The Tesla valve unit includes an inlet section, an arc section, a connecting section, and a first straight section. The connecting section includes a second straight section and an extension section. The two ends of the arc section along its length are connected to one end of the extension section and one end of the first straight section, respectively. The end of the extension section facing away from the arc section is connected to and communicates with the peripheral wall of the second straight section. The inlet section is connected to both the end of the first straight section facing away from the arc section and the end of the second straight section. In the gas-liquid separator, the end of the second straight section opposite to the inlet section is connected to the gas outlet and the first inlet / outlet, and the end of the inlet section opposite to the first straight section is connected to the second inlet / outlet. In the control valve, the end of the second straight segment opposite to the inlet segment is connected to the gas outlet, and the end of the inlet segment opposite to the first straight segment is connected to the first main inlet / outlet.

7. The heat exchanger according to claim 6, characterized in that, In the gas-liquid separator, the Tesla valve unit further includes: A gas segment is provided, which is parallel to the first straight segment. One end of the gas segment is connected to and communicates with the peripheral wall of the second straight segment. The gas segment is located on the side of the extension segment away from the inlet segment. The end of the gas segment away from the second straight segment is connected to the gas outlet.

8. The heat exchanger according to claim 7, characterized in that, Along the length of the second straight segment, the minimum distance between the gas segment and the extension segment is ΔH, and the inner diameter of the inlet segment is D1, satisfying: 0.2D1≤ΔH≤2D1.

9. The heat exchanger according to claim 6, characterized in that, When there are multiple Tesla valve units, the end of the inlet segment of one of any two adjacent Tesla valve units that is away from the first straight segment is connected to the end of the second straight segment of the other Tesla valve unit that is away from the inlet segment. The end of the second straight segment of the Tesla valve unit that is close to the first inlet / outlet is connected to the first inlet / outlet. The end of the inlet segment of the Tesla valve unit that is close to the second inlet / outlet is connected to the second inlet / outlet.

10. The heat exchanger according to claim 6, characterized in that, In the gas-liquid separator, the inner diameter of the inlet section is D1, and satisfies: 5mm≤D1≤12mm; And / or, the inner diameter of the inlet segment is D1, the length of the inlet segment is L1, and satisfies: 5D1≤L1≤10D1; And / or, the outer diameter of the arc segment is R1, the inner diameter of the inlet segment is D1, and the following conditions are met: 1.5D1≤R1≤4D1; And / or, the included angle between the first line segment and the second line segment is α1, and satisfies: 20°≤α1≤60°; And / or, the angle between the extension segment and the second straight segment is θ1, and satisfies: 140°≤θ1≤175°.

11. The heat exchanger according to claim 6, characterized in that, In the control valve, the inlet section of one of any two adjacent Tesla valve units is connected to the end of the second straight section of the other Tesla valve unit that is away from the inlet section. The end of the second straight section of the Tesla valve unit near the gas outlet is connected to the gas outlet. The end of the inlet section of the Tesla valve unit near the first total inlet / outlet is connected to the first total inlet / outlet.

12. The heat exchanger according to claim 6, characterized in that, In the control valve, the inner diameter of the inlet section is D2, and satisfies: 1mm≤D2≤7mm; And / or, the number of the Tesla valve units is 4 to 20; And / or, the length of the inlet segment is L2, and satisfies: 2mm≤L2≤10mm; And / or, the included angle between the first line segment and the second line segment is α2, and satisfies: 30°≤α2≤80°; And / or, the angle between the extension segment and the second straight segment is θ2, and satisfies: 150°≤θ2≤175°; And / or, the outer diameter of the arc segment is R2, the inner diameter of the inlet segment is D2, and the following conditions are met: 1.5D≤R2≤4D2.

13. The heat exchanger according to claim 6, characterized in that, The entrance segment is parallel to the first straight segment.

14. The heat exchanger according to claim 1, characterized in that, The heat exchange flow path is multiple and includes a first flow path and a second flow path. The gas-liquid separator is disposed on the heat exchange flow path. The first flow path is connected to the first total inlet and outlet and the first inlet and outlet respectively. The second flow path is connected to the second total inlet and outlet and the second inlet and outlet respectively. At least one of the first flow path and the second flow path includes multiple sub-flow paths arranged in parallel.

15. The heat exchanger according to claim 1, characterized in that, The gas-liquid separator is located between the heat exchange flow path and the second main inlet and outlet. The heat exchange flow path is multiple and includes a first flow path and a second flow path. The first flow path includes a first sub-flow path and a second sub-flow path connected in parallel. The second flow path includes a third sub-flow path and a fourth sub-flow path connected in parallel. The first sub-flow path is connected to the first main inlet and outlet and the third sub-flow path, respectively. The second sub-flow path is connected to the first main inlet and outlet and the fourth sub-flow path, respectively. The third sub-flow path and the fourth sub-flow path are connected to the first inlet and outlet, respectively.

16. The heat exchanger according to claim 15, characterized in that, The first sub-flow path can be one or multiple sub-flow paths arranged in parallel. When there are multiple first sub-flow paths, the heat exchange tubes of the multiple first sub-flow paths are arranged in the height direction of the heat exchanger. And / or, the second sub-flow path is one or multiple sub-flow paths arranged in parallel. When there are multiple second sub-flow paths, the heat exchange tubes of the multiple second sub-flow paths are arranged in the height direction of the heat exchanger.

17. The heat exchanger according to any one of claims 14-16, characterized in that, The heat exchange tubes of the first flow path and the heat exchange tubes of the second flow path are arranged along the height direction of the heat exchanger.

18. An air conditioner, characterized in that, Includes the heat exchanger according to any one of claims 1-17.

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