Heat exchanger and method of manufacturing the same, electric control box and air conditioning system

Abstract

The present application discloses a heat exchanger, a method for manufacturing the same, an electric control box, and an air conditioning system. The heat exchanger comprises at least two plates and a connecting piece. The at least two plates are installed stacked with respect to each other, and a plurality of microchannels are installed in each. A connecting piece is inserted between adjacent plates. Solder is installed on both sides of the connecting piece, and the solder is used to weld and fix the connecting piece to the plates on both sides of the connecting piece. The heat exchanger of the present application has a simple welding process, high welding reliability, and can reduce processing costs.

Description

Technology Field

[0001] The present application relates to the field of air conditioning technology, and more specifically to a heat exchanger and a method for manufacturing the same, an electric control box and an air conditioning system. Background Technology

[0002] The present application claims priority to a Chinese patent application filed on February 8, 2021, with application number 202110183051.2 and title of invention "heat exchanger and method of manufacturing the same, electric control box and air conditioning system," which is incorporated herein by reference in its entirety.

[0003] Heat exchangers are widely used in air conditioning systems and other fields. For example, air conditioning systems typically use heat exchangers as economizers to increase the degree of subcooling at the condenser outlet and improve the cooling or heating capacity of a unit mass of refrigerant. Conventional heat exchangers include plate heat exchangers. Plate heat exchangers are manufactured by pressing thin metal plates into heat exchange plates with a specific corrugated shape, stacking them, and securing them with clamping plates and bolts. Channels are formed between the heat exchange plates. Refrigerant flows through these channels, enabling heat exchange across the plates. Since heat exchangers require heat exchange plates assembled in multiple layers, they have a large volume.

[0004] The present application provides a heat exchanger, a method for manufacturing the same, an electric control box, and an air conditioning system. This solves the technical problem of conventional plate heat exchangers being bulky and can reduce the difficulty and cost of processing the heat exchanger.

[0005] A first aspect of the present application provides a heat exchanger. The heat exchanger comprises at least two plates and a connecting piece. At least two plates are installed stacked on top of each other. A plurality of microchannels are installed on each of the at least two plates. A connecting piece is installed sandwiched between adjacent plates. Solder is installed on both sides of the connecting piece, and the solder is used to weld and fix the connecting piece to the plates on both sides of the connecting piece.

[0006] Here, the connecting piece between adjacent plates is a single-layer structure. Or the connecting piece between adjacent plates is at least two layers, and furthermore, the connecting pieces between at least two layers are welded and fixed by solder.

[0007] Here, the melting point of the connecting piece is higher than the melting point of the solder.

[0008] Here, the connecting piece is a metal foil.

[0009] Here, the thickness range of the connecting piece is 0.9 mm to 1.2 mm.

[0010] Here, the solder on the connecting piece has a coverage area for adjacent plates on both sides that is 80% or more of the overlapping area of ​​adjacent plates on both sides.

[0011] Here, at least two plates include a first plate and a second plate. A plurality of first microchannels for the flow of a first refrigerant flow are installed on the first plate. A plurality of second microchannels for the flow of a second refrigerant flow are installed on the second plate. The second refrigerant flow absorbs heat from the first refrigerant flow to supercool the first refrigerant flow, or the first refrigerant flow absorbs heat from the second refrigerant flow to supercool the second refrigerant flow.

[0012] Here, the heat exchanger further includes a header tube. At least two insertion holes are installed on the wall of the header tube. A plate corresponds to the insertion holes and is welded to the header tube. Here, the gap between adjacent insertion holes is 2 mm or more.

[0013] A second aspect of the present application provides a method for manufacturing a heat exchanger. The method comprises the steps of: providing at least two plates; providing a connecting piece having solder installed on both sides; stacking at least two plates and inserting the connecting piece between adjacent plates; and heating at least two plates and the connecting piece so that the solder welds and fixes the connecting piece and the plates on both sides of the connecting piece.

[0014] A third aspect of the present application provides an electric control box. The electric control box comprises a box body and a heat exchanger according to any one of the embodiments described above. The heat exchanger is connected to the electric control box. The heat exchanger is used to dissipate heat from the electric control box.

[0015] A fourth aspect of the present application provides an air conditioning system. The air conditioning system comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger, and a heat exchanger according to any one of the embodiments described above. The compressor provides a refrigerant flow that circulates between the outdoor heat exchanger and the indoor heat exchanger through a connecting pipeline. The heat exchanger is installed between the outdoor heat exchanger and the indoor heat exchanger and communicates with the connecting pipeline.

[0016] The beneficial effects of the present application are as follows. That is, unlike the prior art, the volume of the heat exchanger can be effectively reduced by stacking and installing at least two plates having microchannels. In addition, a connecting piece is inserted between the two plates, and the connecting piece and the plates are welded and fixed through solder on both sides of the connecting piece. Therefore, the welding process is simple, the welding reliability is high, and processing costs can be reduced.

[0017] It should be noted that the general description above and the detailed description below are illustrative and interpretive only and do not limit the present application. Brief explanation of the drawing

[0018] The drawings attached herein are incorporated into the specification and constitute part of the specification. These attached drawings illustrate embodiments conforming to the present application and are used together with the specification to explain the technical solution of the present application. FIG. 1 is a schematic diagram of one embodiment of the air conditioning system of the present application. FIG. 2 is a schematic diagram of another embodiment of the air conditioning system of the present application. FIG. 3 is a schematic diagram of another embodiment of the air conditioning system of the present application. FIG. 4 is a schematic diagram of another embodiment of the air conditioning system of the present application. FIG. 5 is a structural diagram of one embodiment of a heat exchange body in a heat exchanger according to the present application. FIG. 6 is a structural diagram of another embodiment of a heat exchange body in a heat exchanger according to the present application. FIG. 7 is a structural diagram of another embodiment of a heat exchange body in a heat exchanger according to the present application. FIG. 8 is a structural diagram of one embodiment of a heat exchange body and a header tube assembly in a heat exchanger according to the present application. FIG. 9 is a structural diagram of another embodiment of a heat exchange body and a header tube assembly in a heat exchanger according to the present application. FIG. 10 is a structural diagram of another embodiment of a heat exchange body and a header tube assembly in a heat exchanger according to the present application. FIG. 11 is a structural diagram of another embodiment of a heat exchange body and a header tube assembly in a heat exchanger according to the present application. FIG. 12 is a structural diagram of another embodiment of a heat exchange body in a heat exchanger according to the present application. FIG. 13 is a structural diagram of another embodiment of a heat exchange body and a header tube assembly in a heat exchanger according to the present application. FIG. 14 is a structural diagram of another embodiment of a heat exchange body and a header tube assembly in a heat exchanger according to the present application. FIG. 15 is a structural diagram of another embodiment of a heat exchange body in a heat exchanger according to the present application. Figure 16 is a three-dimensional structural diagram of the first tubular body installation plane in Figure 15. FIG. 17 is a structural diagram of another embodiment of a heat exchange body in a heat exchanger according to the present application. FIG. 18 is a structural diagram of another embodiment of a heat exchange body and a header tube assembly in a heat exchanger according to the present application. FIG. 19 is a structural diagram of another embodiment of a heat exchange body in a heat exchanger according to the present application. FIG. 20 is a flowchart of one embodiment of the method for manufacturing a heat exchanger in FIG. 19. FIG. 21 is a structural diagram of another embodiment of a heat exchange body and a header tube assembly in a heat exchanger according to the present application. FIG. 22 is a structural diagram of one embodiment of the header in FIG. 21. FIG. 23 is a structural diagram of another embodiment of a heat exchanger according to the present application. Figure 24 is an enlarged cross-sectional view of point B in Figure 23. FIG. 25 is a structural diagram of one embodiment of the heat dissipation fin in FIG. 23. FIG. 26 is a structural diagram of another embodiment of the heat dissipation fin in FIG. 23. FIG. 27 is a three-dimensional structure diagram of an electric control box according to the present application with some elements hidden. FIG. 28 is a three-dimensional structural diagram of one embodiment of the heat sink in FIG. 27. FIG. 29 is a three-dimensional structure diagram of another embodiment of the radiator in FIG. 27. FIG. 30 is a three-dimensional structural diagram of an embodiment of a heat dissipation fixing plate and a heat dissipator according to the present application. FIG. 31 is a planar structural diagram of one embodiment of the heat dissipation fixing plate in FIG. 30. FIG. 32 is a cross-sectional structural diagram of another embodiment of a heat sink and an electric control box according to the present application. FIG. 33 is a cross-sectional structural diagram of another embodiment of a heat sink and an electric control box according to the present application. FIG. 34 is a planar structural diagram of a heat sink and an electric control box fitted together in another embodiment according to the present application. FIG. 35 is a cross-sectional structural diagram of another embodiment in which a heat sink and an electric control box are fitted together according to the present application. FIG. 36 is a structural diagram of one embodiment of the flow guide plate in FIG. 35. FIG. 37 is a structural diagram of another embodiment of the flow guide plate in FIG. 35. FIG. 38 is a structural diagram of another embodiment of the flow guide plate in FIG. 35. FIG. 39 is a planar structural diagram of a heat sink and an electric control box fitted together in another embodiment according to the present application. FIG. 40 is a cross-sectional view of the heat sink and electric control box fitted together in FIG. 39. FIG. 41 is a cross-sectional view of a heat sink and an electric control box fitted together in another embodiment according to the present application. FIG. 42 is a three-dimensional structure diagram of an electric control box of another embodiment according to the present application with some elements hidden. FIG. 43 is a three-dimensional structure diagram of an electric control box with some elements hidden in another embodiment according to the present application. FIG. 44 is a planar structural diagram of an electric control box of another embodiment according to the present application with some elements hidden. Figure 45 is a cross-sectional structural diagram of the electric control box in Figure 44. FIG. 46 is a structural diagram of another embodiment of an air conditioning system according to the present application. Figure 47 is an internal structure diagram of the air conditioning system of Figure 46 with the box body removed. FIG. 48 is a structural diagram of one embodiment of the flow guide sleeve in FIG. 46. FIG. 49 is a structural diagram of another embodiment of the flow guide sleeve in FIG. 46. FIG. 50 is a cross-sectional structural diagram following the AA direction of the air conditioning system in FIG. 46. Specific details for implementing the invention

[0019] The technical solution of the embodiments of the present application is described clearly and completely below with reference to the accompanying drawings of the embodiments of the present application. The described embodiments are only some, not all, of the present application. All other embodiments obtained by those skilled in the art without creative work based on the embodiments of the present application fall within the scope of protection of the present application.

[0020] The term "Examples" as used herein means that specific features, structures, or properties described together with the Examples may be included in at least one of the Examples of this Application. The phrases appearing in various places in the Specification do not necessarily refer to the same Example, nor do they refer to separate or alternative Examples that are mutually exclusive from other Examples. It is understood, expressly and implied, by those skilled in the art, that the Examples described herein may be combined with other Examples.

[0021] Referring to FIG. 1, FIG. 1 is a schematic diagram of an air conditioning system according to one embodiment of the present application. As shown in FIG. 1, the air conditioning system (1) mainly comprises a compressor (2), a four-way valve (3), an outdoor heat exchanger (4), an indoor heat exchanger (5), a heat exchanger (6), an expansion valve (12), and an expansion valve (13). The expansion valve (13) and the heat exchanger (6) are installed between the outdoor heat exchanger (4) and the indoor heat exchanger (5). The compressor (2) provides a refrigerant flow that circulates between the outdoor heat exchanger (4) and the indoor heat exchanger (5) through the four-way valve (3).

[0022] The heat exchanger (6) includes a first heat exchange channel (610) and a second heat exchange channel (611). The first end of the first heat exchange channel (610) is connected to an outdoor heat exchanger (4) via an expansion valve (13). The second end of the first heat exchange channel (610) is connected to an indoor heat exchanger (5). The first end of the second heat exchange channel (611) is connected to the second end of the first heat exchange channel (610) via an expansion valve (12). The second end of the second heat exchange channel (611) is connected to the intake port (22) of the compressor (2).

[0023] When the air conditioning system (1) is in cooling mode, the path of the refrigerant flow is as follows.

[0024] Exhaust port (21) of compressor (2) - connector (31) of four-way valve (3) - connector (32) of four-way valve (3) - outdoor heat exchanger (4) - heat exchanger (6) - indoor heat exchanger (5) - connector (33) of four-way valve (3) - connector (34) of four-way valve (3) - intake port (22) of compressor (2).

[0025] The path (main path) of the refrigerant flow in the first heat exchange channel (610) is the first stage of the first heat exchange channel (610) - the second stage of the first heat exchange channel (610) - the indoor heat exchanger (5). The path (auxiliary path) of the refrigerant flow in the second heat exchange channel (611) is the second stage of the first heat exchange channel (610) - the expansion valve (12) - the first stage of the second heat exchange channel (611) - the second stage of the second heat exchange channel (611) - the intake port (22) of the compressor (2).

[0026] For example, the operating principle of the air conditioning system at this time is as follows. That is, the outdoor heat exchanger (4) acts as a condenser, which outputs a medium-pressure medium-temperature refrigerant flow through the expansion valve (13) (the temperature may be 40°, and the refrigerant flow is liquid). The refrigerant flow in the first heat exchange channel (610) is a medium-pressure medium-temperature refrigerant flow. The expansion valve (12) converts the medium-pressure medium-temperature refrigerant flow into a low-pressure low-temperature refrigerant flow (the temperature may be 10°, and the refrigerant flow is gas-liquid two-phase). The refrigerant flow in the second heat exchange channel (611) is a low-pressure low-temperature refrigerant flow. The low-pressure low-temperature refrigerant flow in the second heat exchange channel (611) absorbs heat from the medium-pressure medium-temperature refrigerant flow in the first heat exchange channel (610). Additionally, the refrigerant flow in the second heat exchange channel (611) vaporizes to further subcool the refrigerant flow in the first heat exchange channel (610). The refrigerant flow in the vaporized second heat exchange channel (611) performs Enhanced Vapor Injection (EVI) on the compressor (2) to improve the cooling capacity of the air conditioning system (1).

[0027] Here, the expansion valve (12) acts as a throttling member of the second heat exchange channel (611) and controls the flow rate of the refrigerant flow in the second heat exchange channel (611). The refrigerant flow in the first heat exchange channel (610) and the refrigerant flow in the second heat exchange channel (611) perform heat exchange to supercool the refrigerant flow in the first heat exchange channel (610). Thus, the heat exchanger (6) acts as an economizer for the air conditioning system (1) and can improve the heat exchange efficiency of the air conditioning system (1) by increasing the degree of supercooling.

[0028] Additionally, as can be understood by those skilled in the art, in heating mode, the connector (31) of the four-way valve (3) is connected to the connector (33), and the connector (32) of the four-way valve (3) is connected to the connector (34). The compressor (2) uses the refrigerant flow output through the exhaust port (21) to flow from the indoor heat exchanger (5) to the outdoor heat exchanger (4), and the indoor heat exchanger (5) is used as a condenser. At this time, the refrigerant flow output from the indoor heat exchanger (5) is divided into two paths: one flows into the first heat exchange channel (610) (main path), and the other flows into the second heat exchange channel (611) through the expansion valve (12) (auxiliary path). The refrigerant flow in the second heat exchange channel (611) can likewise supercool the refrigerant flow in the first heat exchange channel (610) to improve the heating capacity of the air conditioner.

[0029] In some other embodiments, with reference to FIGS. 2 and FIGS. 3, it can be understood that the first end of the second heat exchange channel (611) may not be connected to the second end of the first heat exchange channel (610). The first end of the second heat exchange channel (611) may be directly connected to the first end of the expansion valve (13) or the second end of the expansion valve (13). In this way, the refrigerant flow of the second heat exchange channel (611) may supercool the refrigerant flow of the first heat exchange channel (610), thereby improving the cooling or heating capacity of the air conditioning system (1).

[0030] Referring to FIG. 4, FIG. 4 is a schematic diagram of an air conditioning system according to another embodiment of the present application. The main difference between the air conditioning system (1) shown in FIG. 4 and the air conditioning system (1) shown in FIG. 1 is that a gas-liquid separator (8) is added.

[0031] Similar to the embodiment illustrated in FIG. 1, the heat exchanger (6) includes a first heat exchange channel (610) for the flow of a first refrigerant flow and a second heat exchange channel (611) for the flow of a second refrigerant flow. As the second refrigerant flow flows along the second heat exchange channel (611), it absorbs heat from the first refrigerant flow to supercool the first refrigerant flow. In another embodiment, as the first refrigerant flow flows along the first heat exchange channel (610), it may absorb heat from the second refrigerant flow to supercool the second refrigerant flow. Thus, the heat exchanger (6) can serve as an economizer for the air conditioning system (1) and can improve the heat exchange efficiency of the air conditioning system (1) by increasing the degree of supercooling.

[0032] In this embodiment, the intake port of the compressor (2) includes an enthalpy-increasing gas inlet (221) and a gas recirculation port (222). Additionally, the second refrigerant flow flowing through the second heat exchange channel (611) is further transferred to the enthalpy-increasing gas inlet (221) of the compressor (2) or to the inlet (81) of the gas-liquid separator (8). Here, the outlet (82) of the gas-liquid separator (8) is further connected to the gas recirculation port (222) of the compressor (2) and is used to provide a low-pressure gaseous refrigerant flow to the compressor (2).

[0033] Additionally, the air conditioning system (1) further includes a four-way valve (3), an expansion valve (12), and an expansion valve (13). The expansion valve (13) and the heat exchanger (6) are installed between the outdoor heat exchanger (4) and the indoor heat exchanger (5). The compressor (2) provides a refrigerant flow that circulates between the outdoor heat exchanger (4) and the indoor heat exchanger (5) through the four-way valve (3).

[0034] The four-way valve (3) includes a connector (31), a connector (32), a connector (33), and a connector (34). The connector (32) of the four-way valve (3) is connected to an outdoor heat exchanger (4). The connector (34) of the four-way valve (3) is connected to a gas-liquid separator (8). The connector (31) of the four-way valve (3) is connected to a compressor (2), specifically to the exhaust port (21) of the compressor (2). The connector (33) of the four-way valve (3) is connected to an indoor heat exchanger (5).

[0035] In the above-described embodiment, the function of the four-way valve (3) of the air conditioning system (1) is to enable mutual switching between cooling and heating by changing the flow direction of the refrigerant within the system pipeline, thereby allowing the air conditioning system (1) to switch between a cooling mode and a heating mode. When the air conditioning system (1) has both cooling and heating functions simultaneously, the switching can be done using the above-described four-way valve (3).

[0036] In another embodiment, it can be understood that the air conditioning system (1) may not use a four-way valve (3). If the air conditioning system (1) does not include a four-way valve (3), the compressor (2) may be directly connected to the outdoor heat exchanger (4) through a connecting pipeline. Specifically, the compressor (2) provides a refrigerant flow that circulates between the outdoor heat exchanger (4) and the indoor heat exchanger (5) through the connecting pipeline. The heat exchanger (6) is installed between the outdoor heat exchanger (4) and the indoor heat exchanger (5) and is in communication with the connecting pipeline. For example, if the air conditioning system (1) has only a cooling function or only a heating function, the above-described four-way valve (3) may not be used in the air conditioning system (1). In this way, the structure of the air conditioning system (1) can be simplified, and the production cost of the air conditioning system (1) can be reduced. Additionally, if the heat exchanger (6) is not used as an economizer, the heat exchanger (6) may also be in communication with a connecting pipeline at a different location.

[0037] The first stage of the first heat exchange channel (610) is connected to the outdoor heat exchanger (4) via the expansion valve (13), and the second stage of the first heat exchange channel (610) is connected to the indoor heat exchanger (5). The first stage of the second heat exchange channel (611) is connected to the second stage of the first heat exchange channel (610) via the expansion valve (12). The second stage of the second heat exchange channel (611) is connected to the enthalpy-increasing gas inlet (221) of the compressor (2) or the inlet (81) of the gas-liquid separator (8).

[0038] When the second stage of the second heat exchange channel (611) is connected to the enthalpy-increasing gas inlet (221) of the compressor (2), an intermediate pressure gaseous refrigerant is provided for the EVI of the compressor (2), thereby improving the cooling and / or heating capacity of the air conditioning system (1). Here, the principle and operation of EVI are within the scope of understanding of those skilled in the art and are therefore not described repeatedly here. When the second stage of the second heat exchange channel (611) is connected to the inlet (81) of the gas-liquid separator (8), the evaporation temperature of the refrigerant flow is lower and the temperature difference is greater compared to the intermediate pressure position. Therefore, the heat exchange efficiency of the air conditioning system (1) is further improved.

[0039] The air conditioning system (1) may further include a switching assembly. The switching assembly is used to selectively connect the second stage of the second heat exchange channel (611) to the enthalpy-increasing gas inlet (221) of the compressor (2) and the inlet (81) of the gas-liquid separator (8). That is, the switching assembly can be used to selectively transfer the second refrigerant flow flowing through the second heat exchange channel (611) to the enthalpy-increasing gas inlet (221) of the compressor (2) and the inlet (81) of the gas-liquid separator (8).

[0040] In one embodiment, the switching assembly may include an electronic valve (15). The electronic valve (15) is connected between the enthalpy-increasing gas inlet (221) of the compressor (2) and the second stage of the second heat exchange channel (611). When EVI is required in the compressor (2), the electronic valve (15) is opened to provide an intermediate pressure gaseous refrigerant for EVI of the compressor (2).

[0041] The switching assembly may further include an electronic valve (14). The electronic valve (14) is connected between the second stage of the second heat exchange channel (611) and the inlet (81) of the gas-liquid separator (8). The electronic valve (14) is used to open when EVI is not required or is not suitable for the compressor (2), thereby guiding the second refrigerant flow output from the second stage of the second heat exchange channel (611) to the gas-liquid separator (8).

[0042] Here, the electronic valve (15) and the electronic valve (14) are each connected to the second stage of the second heat exchange channel (611). The expansion valve (12) acts as a throttling member of the second heat exchange channel (611) and controls the flow rate of the second refrigerant flow of the second heat exchange channel (611).

[0043] The cooling and heating principles of the air conditioning system (1) shown in FIG. 4 and the air conditioning system (1) shown in FIG. 1 are basically the same, so they are not explained repeatedly here.

[0044] As illustrated in FIG. 4, the air conditioning system (1) further includes an electric control box (7). A heat exchanger (6) is connected to the electric control box (7), and the heat exchanger (6) is installed to dissipate heat for electronic components within the electric control box (7). Specifically, refer to the following description. That is, the heat exchanger (6) acts as an economizer for the air conditioning system (1) to increase the degree of supercooling, and also acts as a radiator to dissipate heat for the electric control box (7). Specifically, it dissipates heat for electronic components within the electric control box (7).

[0045] The present application further optimizes the following aspects based on the overall structure of the air conditioning system (1) described above.

[0046] 1. Microchannel heat exchanger

[0047] As illustrated in FIGS. 5, 6, and 7, the heat exchanger (6) includes a heat exchange body (61). A plurality of microchannels (612) are installed in the heat exchange body (61). The plurality of microchannels (612) include a first microchannel and a second microchannel. In addition, in the air conditioning system illustrated in FIGS. 1 to 4, the first microchannel is used as the first heat exchange channel (610) of the heat exchanger (6), and the second microchannel is used as the second heat exchange channel (611) of the heat exchanger (6). Accordingly, the same reference numeral is used for the first microchannel (610) and the first heat exchange channel (610), and the same reference numeral is used for the second microchannel (611) and the second heat exchange channel (611). The heat exchange body (61) may include a single or a plurality of plates (613).

[0048] Each microchannel (612) may have a rectangular cross-sectional shape perpendicular to its extension direction, and the side length of each microchannel (612) is 0.5 mm to 3 mm. Since the thickness between each microchannel (612) and the surface of the plate (613) and between the microchannels (612) is 0.2 mm to 0.5 mm, the microchannels (612) satisfy the requirements for internal pressure and heat transfer performance. In another embodiment, the cross-sectional shape of the microchannel (612) may be a different shape, such as a circular, triangular, trapezoidal, elliptical, or irregular shape.

[0049] Multiple microchannels (612) can be installed as single-layer microchannels or multi-layer microchannels. When the flow velocity of the refrigerant flow is relatively low and the flow state of the refrigerant flow is laminar, the larger the cross-sectional area of ​​the multiple microchannels (612), the shorter the length of the multiple microchannels (612), and the flow resistance loss of the refrigerant flow can be reduced.

[0050] A plurality of microchannels (612) of the plate body (613) may include a first microchannel (610) and a second microchannel (611) installed alternately. The extension direction (D1) of the first microchannel (610) and the extension direction (D2) of the second microchannel (611) are parallel to each other. Specifically, as shown in FIG. 5, a first predetermined quantity of microchannels in the plurality of microchannels (612) is divided into the first microchannel (610). A second predetermined quantity of microchannels in the plurality of microchannels (612) is divided into the second microchannel (611). A plurality of sets of first microchannels (610) and a plurality of sets of second microchannels (611) are installed alternately in sequence. That is, a second microchannel (611) is installed between two sets of first microchannels (610), and a first microchannel (610) is installed between two sets of second microchannels (611). Through this, at least two sets of first microchannels (610) and second microchannels (611) are spaced apart from each other to form a heat exchanger (6) in which the first microchannels (610) and second microchannels (611) are arranged alternately. The first predetermined quantity and the second predetermined quantity may be the same or different.

[0051] Additionally, in the usage scenarios illustrated in FIGS. 1 to 4, the first microchannel (610) and the second microchannel (611) may be provided to allow different refrigerant flows independently of each other. Furthermore, one refrigerant flow may be supercooled to another refrigerant flow. In another embodiment, the first microchannel (610) and the second microchannel (611) may be connected to each other to allow the same refrigerant flow to flow as a single microchannel. Additionally, if the first microchannel (610) and / or the second microchannel (611) are installed in two or more layers, the two or more layers of the first microchannel (610) and / or the second microchannel (611) may be connected to each other through a reverse header pipe. Alternatively, the plate (613) may be folded 180 degrees to form two or more layers of the first microchannel (610) and / or the second microchannel (611).

[0052] Optionally, in one embodiment, as illustrated in FIG. 5, the heat exchange body (61) may include at least one set of first microchannels (610) and at least one set of second microchannels (611). The at least one set of first microchannels (610) and at least one set of second microchannels (611) are spaced apart from each other along the width direction of the plate body (613). The width direction is perpendicular to the extension direction of the plate body (613).

[0053] In another embodiment, as shown in FIG. 6, the at least one set of first microchannels (610) and at least one set of second microchannels (611) may be spaced apart from each other along the thickness direction of the plate body (613). The thickness direction is perpendicular to the extension direction of the plate body (613).

[0054] In another embodiment, as shown in FIG. 7, the first microchannel (610) and the second microchannel (611) are independent of each other and are each installed on different plates (613). Thus, the extension direction (D1) of the first microchannel (610) and the extension direction (D2) of the second microchannel (611) are arranged perpendicularly to each other. In this way, the first header tube and the second header tube described later can be installed on different sides of the heat exchanger (6), making it easy to arrange the header tubes of the heat exchanger (6). In this embodiment, the first microchannel (610) and the second microchannel (611) are used for the flow of different refrigerant flows, and one of the refrigerant flows can be supercooled to the other refrigerant flow.

[0055] Additionally, the plate body (613) may be a flat tube, and a heat dissipation component or an electronic component may be installed on the plate body (613). In another embodiment, the plate body (613) may be a substrate having a cross-section of a different shape, such as a cylinder, a rectangular prism, a cube, etc. In another embodiment, as described below, the heat exchange body (61) may include at least two plate bodies (613) stacked together or two tube bodies nested together.

[0056] For example, under the cooling mode of the air conditioning system illustrated in FIGS. 1 to 4, a first refrigerant flow (i.e., a medium-pressure, medium-temperature refrigerant flow) flows through the first microchannel (610), and a second refrigerant flow (i.e., a low-pressure, low-temperature refrigerant flow) flows through the second microchannel (611). The first refrigerant flow may be a liquid refrigerant flow, and the second refrigerant flow may be a gas-liquid two-phase refrigerant flow. The second refrigerant flow absorbs heat from the first refrigerant flow in the first microchannel (610) and further vaporizes it along the flow process of the second microchannel (611). This further subcools the first refrigerant flow.

[0057] It should be noted that in the description above and the description to be described below, the heat exchanger (6) based on a microchannel structure is not limited to the application situations illustrated in FIGS. 1 to 4. Accordingly, the terms "first" and "second" in the first microchannel (610) and the second microchannel (611), and in the first refrigerant flow and the second refrigerant flow, are used only to distinguish different microchannels and refrigerant flows. This cannot be considered a limitation on the specific application of the microchannel (612) and the refrigerant flow. For example, under other embodiments or operating modes, the first refrigerant flow flowing through the first microchannel (610) may absorb heat from the second refrigerant flow in the second microchannel (611). Furthermore, the state of the first refrigerant flow and the second refrigerant flow is not limited to the liquid or gas-liquid two-phase as defined above.

[0058] As shown in FIGS. 1 to 4, the flow direction (A1) of the first refrigerant flow and the flow direction (A2) of the second refrigerant flow are opposite. This ensures that the temperature of the first refrigerant flow and the temperature of the second refrigerant flow always have a relatively large temperature difference within the heat exchange region, thereby improving the heat exchange efficiency of the first refrigerant flow and the second refrigerant flow.

[0059] Optionally, the flow direction (A1) of the first refrigerant flow may be the same as or perpendicular to the flow direction (A2) of the second refrigerant flow. When the refrigerant flow directions are the same, the temperature of the heat exchanger (6) on one side near the inlet is relatively low, so the heat exchange effect in that area can be improved. For example, the heat dissipation effect is improved by connecting that area to an area with relatively high electrically controlled heat generation. When the refrigerant flow directions are perpendicular to each other, the first header pipe and the second header pipe are installed on different sides of the heat exchanger (6), respectively, so the arrangement of the heat exchanger refrigerant header pipes can be easy.

[0060] 1-1. Header Tube Assembly

[0061] Referring further to FIG. 8, the heat exchanger (6) further includes a header tube assembly (62). The extension direction of the header tube assembly (62) and the extension direction of the heat exchanger body (61) are installed perpendicular to each other. For example, if the heat exchanger body (61) is installed along a horizontal plane, the header tube assembly (62) is installed vertically along the direction of gravity. In this way, when the header tube assembly (62) is connected to a compressor installed below the heat exchanger (6), the pipeline arrangement of the header tube assembly (62) can be facilitated.

[0062] When the heat exchange body (61) is installed vertically along the direction of gravity, the header tube assembly (62) is installed along the horizontal plane. In this way, the uniformity of the refrigerant distribution within the header tube assembly (62) is improved, and furthermore, the refrigerant within the heat exchange body (61) can be distributed relatively uniformly.

[0063] As illustrated in FIG. 8, the header tube assembly (62) includes a first header tube (621) and a second header tube (622). A first header channel is installed in the first header tube (621), and a second header channel is installed in the second header tube (622). Here, the heat exchanger (6) has an I-shaped cross-sectional profile that follows the flow direction of the refrigerant flow (first refrigerant flow or second refrigerant flow) in the heat exchange body (61). In another embodiment, the heat exchanger (6) may have an L-shaped, U-shaped, G-shaped, or circular cross-sectional profile that follows the flow direction of the refrigerant flow in the heat exchange body (61).

[0064] The first header channel is connected to the first microchannel (610). The first header channel provides a first refrigerant flow to the first microchannel (610) and / or collects the first refrigerant flow flowing through the first microchannel (610).

[0065] For example, in the air conditioning system illustrated in FIGS. 1 to 4, the first stage of the first microchannel (610) is connected to an outdoor heat exchanger (4) via an expansion valve (13) through one of the two first header tubes (621) to provide a first refrigerant flow to the first microchannel (610) in a cooling mode. The second stage of the first microchannel (610) is connected to an indoor heat exchanger (5) through the other of the two first header tubes (621) to collect the first refrigerant flow flowing through the first microchannel (610). In a heating mode, since the flow direction of the first refrigerant flow in the first microchannel (610) is opposite, the functions of the two first header tubes (621) are reversed compared to the cooling mode.

[0066] The second header channel is connected to the second microchannel (611). Through the second header channel, a second refrigerant flow is provided to the second microchannel (611) and / or the second refrigerant flow flowing through the second microchannel (611) is collected. For example, in the air conditioning system illustrated in FIGS. 1 to 4, the first end of the second microchannel (611) is connected to the second expansion valve (12) through one of the two second header tubes (622) to provide the second refrigerant flow to the second microchannel (611). The second end of the second microchannel (611) is connected to the enthalpy increase gas inlet (221) of the compressor (2) or the inlet (81) of the gas-liquid separator (8) through the other of the two second header tubes (622) to collect the second refrigerant flow flowing through the second microchannel (611).

[0067] When the first microchannel (610) and / or the second microchannel (611) are connected by a 180° bend or reverse header tube to form two layers of the first microchannel (610) or the second microchannel (611), the inlet and outlet of the first microchannel (610) and / or the second microchannel (611) may be installed on the same side of the heat exchange body (61). At this time, the first header channel and the second header channel described above may be divided into a refrigerant supply area and a refrigerant collection area. The inlet and outlet of the first header channel and / or the second header channel are each connected to the refrigerant supply area and the refrigerant collection area provided by the header tube assembly (62).

[0068] In one embodiment, the heat exchange body (61) includes at least two sets of first microchannels (610) and at least two sets of second microchannels (611). Here, the same end of the at least two sets of first microchannels (610) is connected to the same first header tube (621). The same end of the at least two sets of second microchannels (611) is connected to the same second header tube (622). That is, since one header tube can correspond to multiple sets of microchannels, there is no need to install a header tube corresponding to each microchannel, thereby reducing costs.

[0069] In the embodiment illustrated in FIG. 8, the extension direction (D1) of the first microchannel (610) and the extension direction (D2) of the second microchannel (611) are parallel to each other. Thus, the extension directions of the first header tube (621) and the second header tube (622) are parallel to each other. However, in another embodiment, the extension directions of the first header tube (621) and the second header tube (622) can be adjusted according to the extension directions of the first microchannel (610) and the second microchannel (611). For example, they can be installed to be perpendicular to each other.

[0070] 1-2. Installation of the 1st and 2nd header pipes with spacing

[0071] As shown in FIG. 8, the first header tube (621) and the second header tube (622) are installed spaced apart. Additionally, the second header tube (622) is installed further away from the heat exchange body (61) than the first header tube (621). The first header tube (621) is installed between the second header tube (622) and the heat exchange body (61).

[0072] In one embodiment, as shown in FIG. 9, the second microchannel (611) penetrates the first header tube (621) and is inserted into the second header tube (622) and welded in place. The first microchannel (610) is inserted into the first header tube (621) and welded in place. In another embodiment, as shown in FIG. 10, the first header tube (621) is installed further away from the heat exchange body (61) than the second header tube (622). The second header tube (622) is installed between the first header tube (621) and the heat exchange body (61). The first microchannel (610) penetrates the second header tube (622) and is inserted into the first header tube (621) and welded in place.

[0073] In the above description and the description to be described below, the statement that a microchannel penetrates a specific header tube means that the microchannel passes through the said header tube but is not in communication with the said header tube. It should also be noted that the statement that a microchannel is inserted into a header tube means that the microchannel and the header tube are in communication. For example, the statement that the second microchannel (611) penetrates the first header tube (621) means that the second microchannel (611) passes through the first header tube (621) but is not in communication with the first header tube (621). Furthermore, the statement that the second microchannel (611) is inserted into the second header tube (622) means that the second microchannel (611) and the second header tube (622) are in communication.

[0074] The first microchannel (610) and the second microchannel (611) may each be installed in one or more sets. For example, as shown in FIG. 9, the first microchannel (610) may be installed in two sets, and the second microchannel (611) may be installed in one set. The second microchannel (611) is located between the two sets of the first microchannel (610). In another embodiment, both the first microchannel (610) and the second microchannel (611) may be installed in two or more sets. Additionally, the first microchannel (610) and the second microchannel (611) may be installed alternately in stacked form. For example, there are arrangement forms such as first microchannel (610)-second microchannel (611)-first microchannel (610)-second microchannel (611) or first microchannel (610)-second microchannel (611)-second microchannel (611)-first microchannel (610).

[0075] In another embodiment, as shown in FIG. 9, one of the first microchannel (610) and the second microchannel (611) may be used as the main channel, and the other of the first microchannel (610) and the second microchannel (611) may be used as the auxiliary channel. Additionally, the refrigerant flow of the main channel may be supercooled using the refrigerant flow of the auxiliary channel. At this time, the flow rate of the refrigerant flow in the main channel is relatively large, and the flow rate of the refrigerant flow in the auxiliary channel is relatively small. Therefore, the main channel is installed on the outside of the heat exchange body (61), making it easy to connect it to the electric control box (7) and to perform heat dissipation to the electric control box (7). Furthermore, in this embodiment, the main channel with a large refrigerant flow rate penetrates the header tube corresponding to the auxiliary channel and is inserted into the header tube corresponding to the main channel. This method does not occupy the space of the header tube corresponding to the main channel compared to the auxiliary channel penetrating the header tube corresponding to the main channel. Therefore, the pressure loss of the flow path in the header pipe corresponding to the main channel can be reduced, making the flow distribution more uniform.

[0076] For example, as illustrated in FIG. 10, if the first microchannel (610) is a main channel with a large refrigerant flow rate and the second microchannel (611) is an auxiliary channel with a small refrigerant flow rate, the first microchannel (610) penetrates the second header tube (622) and is inserted into the first header tube (621). In this way, the second microchannel (611) may not occupy space in the first header tube (621). Therefore, compared to the method in which the second microchannel (610) penetrates the first header tube (621), the flow pressure loss of the first header tube (621) is reduced, and the flow distribution can be made more uniform.

[0077] In another embodiment, the first header tube (621) and the second header tube (622) may be welded together to reduce the distance between the first header tube (621) and the second header tube (622). In another embodiment, the first header tube (621) and the second header tube (622) may be bonded or clamped together.

[0078] Additionally, the first microchannel (610) may bypass the second header tube (622) and then be connected to the first header tube (621). For example, the first microchannel (610) may be installed on the outside of the second header tube (622) and bypass the second header tube (622) and then be connected to the first header tube (621). Alternatively, the second microchannel (611) may bypass the first header tube (621) and then be connected to the second header tube (622).

[0079] In another embodiment, the microchannels on the heat exchange body (61) may be installed in a different manner. At least some of the microchannels are inserted into the other header tube by passing through one of at least two header tubes. In this manner, the volume of the heat exchanger (6) can be reduced. In a specific installation, a microchannel with a large refrigerant flow rate may be inserted into the other header tube by passing through one of at least two header tubes. In this manner, the pressure loss of the header tube is further reduced, and the microchannel flow distribution can be made more uniform.

[0080] It can be understood that the heat exchange body (61) may be composed of one plate body (613) or multiple plate bodies (613). Accordingly, the first microchannel (610) and the second microchannel (611) may be installed on the same plate body (613) or on different plate bodies (613). For example, when the first microchannel (610) and the second microchannel (611) are installed on the same plate body (613), one end of a portion of the microchannel penetrates one of the header tubes of the at least two header tubes and is inserted into the other header tube. The other end of the at least portion of the microchannel is inserted into the header tube through which it penetrates. Through such installation, the directness of the heat exchange body (61) can be improved, processes such as welding can be omitted, and the heat exchange effect can be enhanced.

[0081] The above at least two header tubes are not limited to the spacing method described above, and may be at least two header tubes formed by fitting a fluid dividing plate into a total header tube as described below.

[0082] 1-3. Divide the total header pipe into two header pipes

[0083] As illustrated in FIG. 11, the header pipe assembly (62) includes a total header pipe (623) and a flow splitter plate (624). The flow splitter plate (624) is installed within the total header pipe (623) to form the total header pipe (623) into a first header pipe (621) and a second header pipe (622) that are divided by the flow splitter plate (624). In another embodiment, the number of flow splitter plates (624) and the formed header pipes can be set as needed.

[0084] At this time, as illustrated in FIG. 11, the first microchannel (610) penetrates the wall of the total header tube (623) and is inserted into the first header tube (621). The second microchannel (611) penetrates the wall of the total header tube (623) and the flow splitter plate (624) (i.e., penetrates the first header tube (621)) and is inserted into the second header tube (622). In another embodiment, the second microchannel (611) can penetrate the wall of the total header tube (623) and be inserted into the second header tube (622). The first microchannel (610) penetrates the wall of the total header tube (623) and the flow splitter plate (624) and is inserted into the first header tube (621).

[0085] Compared to the header tube assembly (62) illustrated in FIG. 9 or FIG. 10, this embodiment can reduce the cost and volume of the total header tube (62) by simultaneously implementing the functions of the first header tube (621) and the second header tube (622) through the total header tube (623).

[0086] In another embodiment, the total header tube (623) can be divided into two first header tubes (621) or two second header tubes (622) using a flow dividing plate (624). For example, when the first microchannel (610) or the second microchannel (611) forms two layers of the first microchannel (610) or the second microchannel (611) by a 180° bend or reverse header tube, one end of the first microchannel (610) penetrates the wall of the total header tube (623) and is inserted into one of the first header tubes (621). The other end of the first microchannel (610) penetrates the wall of the total header tube (623) and the flow dividing plate (624) and is inserted into one of the first header tubes (621). Alternatively, one end of the second microchannel (611) penetrates the wall of the total header tube (623) and is inserted into one of the second header tubes (622). The other end of the second microchannel (611) penetrates the wall of the total header tube (623) and the flow dividing plate (624) and is inserted into one of the other second header tubes (622).

[0087] In another embodiment, as illustrated in FIGS. 12 and 13, a slot (601) may be installed on a cross-section of the heat exchange body (61). The slot (601) is located between the first microchannel (610) and the second microchannel (611). A flow dividing plate (624) is embedded within the slot (601) so that the first microchannel (610) penetrates the wall of the total header tube (623) and is inserted into the first header tube (621). Additionally, the second microchannel (611) penetrates the wall of the total header tube (623) and is inserted into the second header tube (622). By installing the slot (601) in this manner, the overall length of the heat exchanger (6) can be shortened, and the material cost of the heat exchanger (6) can be reduced. Furthermore, the welding process of the header tube assembly (62) and the heat exchange body (61) can be simplified.

[0088] In one embodiment, when the first microchannel (610) or the second microchannel (611) forms two layers of the first microchannel (610) or the second microchannel (611) by 180° bending or reverse header tubes, the inlet end and the outlet end of the heat exchange body (61) are located on the same side. At this time, one end of the first microchannel (610) penetrates the wall of the total header tube (623) and is inserted into one of the first header tubes (621). The other end of the first microchannel (610) penetrates the wall of the total header tube (623) and is inserted into the other first header tube (621).

[0089] Alternatively, one end of the second microchannel (611) penetrates the wall of the total header tube (623) and is inserted into one of the second header tubes (622). The other end of the second microchannel (611) penetrates the wall of the total header tube (623) and is inserted into one of the second header tubes (622).

[0090] Additionally, the heat exchange body (61) may be a single plate (613) or multiple plates (613). In the embodiment illustrated in FIG. 12, the heat exchange body (61) may be a single plate (613), and the first microchannel (610) and the second microchannel (611) are installed within the single plate (613). Additionally, on the cross-section of the single plate (613), a gap area is installed between the first microchannel (610) and the second microchannel (611). A slot (601) is installed within the gap area. In this manner, the heat exchange body (61) is installed integrally, resulting in a simple structure and relatively high reliability. Furthermore, the heat transfer efficiency of the heat exchange body (61) can be improved. In another embodiment, as described below, the heat exchange body (61) may include at least two plates (613). At least two plates (613) are installed in a stacked manner. A slot (601) is installed at the end of at least two plates (613). Additionally, the slot (601) is installed between adjacent plates (613) among the at least two plates (613), and a movable dividing plate (624) is embedded within the slot (601).

[0091] Note that the above-described flow dividing plate (624) and slot (601) fitting method may be applied to other microchannel grouping methods. Only at least two sets of microchannels need to be installed on the heat exchange body (61). These at least two sets of microchannels may be connected to each other and provided for the same refrigerant flow. They may also be used independently for different refrigerant flow.

[0092] 1-4. Installation of Nesting for 1st and 2nd Header Pipes

[0093] As illustrated in FIG. 14, the diameter of the second header tube (622) is smaller than the diameter of the first header tube (621). The first header tube (621) is installed to cover the outside of the second header tube (622). The first microchannel (610) penetrates the wall of the first header tube (621) and is inserted into the first header tube (621). The second microchannel (611) penetrates the walls of the first header tube (621) and the second header tube (622) and is inserted into the second header tube (622). In another embodiment, the second header tube (622) may be installed to cover the outside of the first header tube (621). In this case, the second microchannel (611) penetrates the wall of the second header tube (622) and is inserted into the second header tube (622). The first microchannel (610) penetrates the walls of the second header tube (622) and the first header tube (621) and is inserted into the first header tube (621).

[0094] Compared to the header tube assembly (62) shown in FIG. 9 or FIG. 10, the volume of the header tube assembly (62) can be reduced through nesting installation.

[0095] In another embodiment, two first header tubes (621) may be nested together, or two second header tubes (622) may be nested together. In this case, one end of the first microchannel (610) penetrates the wall of the outer first header tube (621) and is inserted into the outer first header tube (621). The other end of the first microchannel (610) penetrates the wall of the two first header tubes (621) and is inserted into the inner first header tube (621).

[0096] Alternatively, one end of the second microchannel (611) penetrates the wall of the outer second header tube (622) and is inserted into the outer second header tube (622). The other end of the second microchannel (611) penetrates the wall of the two second header tubes (622) and is inserted into the inner second header tube (622).

[0097] 2. Sleeve-type heat exchanger

[0098] As illustrated in FIG. 15, the heat exchanger (6) includes a heat exchange body (61). The heat exchange body (61) includes a first tube body (614) and a second tube body (615) nested together. That is, the heat exchanger (6) is a sleeve-type heat exchanger. A plurality of first microchannels (610) are installed within the first tube body (614), and a plurality of second microchannels (611) are installed within the second tube body (615). The plurality of first microchannels (610) and the plurality of second microchannels (611) are all identical to the microchannels (612) illustrated in FIG. 5. Thus, the length of the heat exchange body (61) is shortened, and the volume of the heat exchanger (6) is reduced.

[0099] Here, the extension direction of the first microchannel (610) and the extension direction of the second microchannel (611) are parallel to each other. For example, the extension direction of the first microchannel (610) and the extension direction of the second microchannel (611) are the same.

[0100] In this embodiment, as shown in FIG. 16, the first tube (614) is installed to cover the outer side of the second tube (615). At least one flat surface (616) is installed on the outer surface of the first tube (614) to form a heat exchange contact surface of the first tube (614). A heat dissipation component or an electronic component can be installed on the flat surface (616) so as to be easy to mount. In another embodiment, the second tube (615) is installed to cover the outer side of the first tube (614) and forms a similar flat surface.

[0101] In the air conditioning system (1) illustrated in FIGS. 1 to 4, a first refrigerant flow flows through a plurality of first microchannels (610), and a second refrigerant flow flows through a plurality of second microchannels (611). The first refrigerant flow is a liquid refrigerant flow, and the second refrigerant flow is a gas-liquid two-phase refrigerant flow. The second refrigerant flow absorbs heat from the first refrigerant flow in the plurality of first microchannels (610) and further vaporizes it along the flow process of the plurality of second microchannels (611). This further subcools the first refrigerant flow. In other embodiments or operating modes, the first refrigerant flow flowing through the first microchannels (610) may absorb heat from the second refrigerant flow in the second microchannels (611). Furthermore, the state of the first refrigerant flow and the second refrigerant flow is not limited to the liquid or gas-liquid two-phase defined above.

[0102] Compared to the heat exchanger (6) shown in FIG. 5, the cross-sectional area of ​​the heat exchange body (61) is increased, thereby reducing pressure loss of the refrigerant flow. Additionally, the first tube (614) and the second tube (615) are installed in a sleeve shape, which can increase the heat exchange area of ​​the plurality of first microchannels (610) and the plurality of second microchannels (611). This improves the heat exchange efficiency between the first microchannel (610) and the second microchannel (611).

[0103] Similar to FIG. 8, the heat exchanger (6) further includes a header tube assembly (62). The header tube assembly (62) includes a first header tube (621) and a second header tube (622). A first header channel is installed in the first header tube (621). The first header channel is used to provide a first refrigerant flow to a first microchannel (610) and / or to collect the first refrigerant flow flowing through the first microchannel (610). A second header channel is installed in the second header tube (622). The second header channel provides a second refrigerant flow to a second microchannel (611) and / or to collect the second refrigerant flow flowing through the second microchannel (611). Here, the heat exchanger (6) has an I-shaped cross-sectional profile following the flow direction of the refrigerant flow in the heat exchange body (61). In another embodiment, the heat exchanger (6) may have a cross-sectional shape following the flow direction of the refrigerant flow in the heat exchange body (61), such as an L-shape, a U-shape, a G-shape, or a circle.

[0104] The header tube assembly (62) may adopt various header tube installation methods described above. For example, there is a mutually spaced installation method of the first header tube (621) and the second header tube (622) described above, an installation method of the total header tube (623) and the fluid dividing plate (624), or a mutual nesting installation method of the first header tube (621) and the second header tube (622). At this time, the first tube body (614) and the first microchannel (610) above it, and the second tube body (615) and the second microchannel (611) above it, can all be fitted with the header tubes described above in the manner described above. This is not explained repeatedly here.

[0105] 3. A plurality of plate bodies installed stacked on top of each other in a heat exchanger

[0106] As illustrated in FIG. 17, the heat exchanger (6) includes a heat exchange body (61). The heat exchange body (61) includes a first plate body (631) and a second plate body (632). The first plate body (631) and the second plate body (632) are installed stacked on top of each other.

[0107] A plurality of first microchannels (610) are formed within the first plate body (631). A plurality of second microchannels (611) are installed within the second plate body (632). Since the plurality of first microchannels (610) and the plurality of second microchannels (611) are all identical to the microchannels (612) shown in FIGS. 5 to 7, they are not described repeatedly here. Since a multi-layer structure is adopted, the length of the heat exchange body (61) is shortened, and the volume of the heat exchanger (6) is reduced.

[0108] Since the first plate (631) and the second plate (632) are stacked and installed together, the contact area between the first plate (631) and the second plate (632) increases. Accordingly, the heat exchange area between the first microchannel (610) and the second microchannel (611) increases, and the heat exchange efficiency is improved.

[0109] In the air conditioning system illustrated in FIGS. 1 to 4, a first refrigerant flow flows through a plurality of first microchannels (610), and a second refrigerant flow flows through a plurality of second microchannels (611). The second refrigerant flow absorbs heat from the first refrigerant flow in the plurality of first microchannels (610) along the flow process of the plurality of second microchannels (611) and further vaporizes it. This further supercools the first refrigerant flow.

[0110] In other embodiments or operating modes, the first refrigerant flow flowing through the first microchannel (610) may absorb heat from the second refrigerant flow in the second microchannel (611). Additionally, the states of the first refrigerant flow and the second refrigerant flow are not limited to the liquid or gas-liquid two-phase states defined above.

[0111] One or more first plates (631) and second plates (632) may each be installed. For example, the quantity of the first plates (631) may be two. The second plates (632) are clamped between two first plates (631). For example, the first plates (631), the second plates (632), and the first plates (631) are installed in a stacked manner. Since the second plates (632) are clamped between two first plates (631), the second refrigerant flow of the second plates (632) simultaneously absorbs heat from the first refrigerant flow of the two first plates (631). This supercools the first refrigerant flow of the two first plates (631). Additionally, a heat dissipation component or an electronic component may be installed connected to the first plates (631) to conduct heat. For example, it is installed on the surface of the first plate (631) far from the second plate (632), making mounting easy. In another embodiment, the first plate (631) and the second plate (632) can both be installed in two or more units. Additionally, the first plate (631) and the second plate (632) can be installed alternately in stacked form.

[0112] In one embodiment, the two first plates (631) may be two independent plates. In another embodiment, the two first plates (631) may be connected in a U-shape or connected by a reverse header tube. In this case, the first microchannels (610) within the two first plates (631) are connected in a U-shape. Also, the inlet and outlet of the first microchannels (610) are located on the same side of the heat exchange body (61).

[0113] In another embodiment, the number of second plates (632) may be two, and the first plate (631) is clamped and installed between the two second plates (632). At this time, a heat dissipation component or an electronic component may be connected and installed to conduct heat with the second plates (632).

[0114] As illustrated in FIG. 18, the heat exchanger (6) further comprises a header tube assembly (62). The header tube assembly (62) comprises a first header tube (621) and a second header tube (622). A first header channel is installed in the first header tube (621). The first header channel is used to provide a first refrigerant flow to a first microchannel (610) and / or to collect the first refrigerant flow flowing through the first microchannel (610). A second header channel is installed in the second header tube (622). The second header channel provides a second refrigerant flow to a second microchannel (611) and / or to collect the second refrigerant flow flowing through the second microchannel (611).

[0115] The header tube assembly (62) may adopt various header tube installation methods described above. For example, there is a mutually spaced installation method of the first header tube (621) and the second header tube (622) described above, an installation method of the total header tube (623) and the fluid dividing plate (624), or a mutual nesting installation method of the first header tube (621) and the second header tube (622). At this time, the first plate body (631) and the first microchannel (610) above it, and the second plate body (632) and the second microchannel (611) above it, can all be fitted with the header tubes described above in the manner described above.

[0116] 3-1. Welding process between stacked plates

[0117] As illustrated in FIG. 19, in this embodiment, the heat exchanger (6) comprises a first plate body (631), a second plate body (632), and a connecting piece (64). The first plate body (631) and the second plate body (632) are installed stacked on top of each other. The connecting piece (64) is interposed between adjacent first plate bodies (631) and second plate bodies (632). Solder (not shown) is installed on both sides of the connecting piece (64). The solder is used to weld and fix the connecting piece (64) to the first plate body (631) and the second plate body (632) on both sides of the connecting piece (64).

[0118] In this embodiment, after installing solder on both sides of the connecting piece (64), the first plate body (631) and the second plate body (632) are welded through the connecting piece (64). In this way, the first plate body (631) and the second plate body (632) can be effectively fixed together. Since solder must be applied to the joint surface of the two plates (613) when welding between adjacent plates (613), production costs can be significantly reduced by placing the connecting piece (64) with solder between the two plates (613) compared to using plates (613) with solder coated on the surface.

[0119] Additionally, the melting point of the connecting piece (64) is higher than the melting point of the solder. The connecting piece (64) may be a metal foil that improves thermal conductivity. For example, the connecting piece (64) may be an aluminum foil or a copper foil. The cost of the metal foil is relatively low, and the process of installing solder on both sides of the metal foil is also relatively simple. Therefore, the metal foil with solder is relatively easy to obtain and the production cost is relatively low.

[0120] The solder on the connecting piece (64) has a coverage area for the adjacent first plate body (631) and second plate body (632) on both sides that is 80% or more of the overlapping area of ​​the first plate body (631) and the second plate body (632). Thus, the welding reliability between the first plate body (631) and the second plate body (632) is improved. Optionally, the solder on the connecting piece (64) may have a coverage area for the first plate body (631) and the second plate body (632) that is 80% of the overlapping area of ​​the adjacent first plate body (631) and the second plate body (632) on both sides. Alternatively, the solder on the connecting piece (64) may have a coverage area for the first plate body (631) and the second plate body (632) that is equal to the overlapping area of ​​the first plate body (631) and the second plate body (632). In this way, the reliability of the heat exchanger (6) can be further improved.

[0121] Optionally, the connecting piece (64) between the first plate body (631) and the second plate body (632) may be a single-layer structure. That is, only one layer of the connecting piece (64) is installed between the first plate body (631) and the second plate body (632). In another embodiment, the connecting piece (64) between the first plate body (631) and the second plate body (632) is at least two layers. For example, the connecting piece (64) may be a two-layer, three-layer, or four-layer structure. In this case, the connecting pieces (64) between the at least two layers are further welded and fixed by solder. By flexibly selecting the number of layers of the connecting piece (64), the distance between the first plate body (631) and the second plate body (632) can be adjusted, allowing the heat exchanger (6) to be adapted to different application situations. For example, a slot is formed between the first plate (631) and the second plate (632) with a width equal to the stacking thickness of the at least two layers of connecting pieces (64), and is fitted with the above-described fluid dividing plate.

[0122] The thickness range of the connecting piece (64) is 0.9 mm to 1.2 mm. For example, the thickness of the connecting piece (64) may be 0.9 mm, 1 mm, or 1.2 mm, etc.

[0123] The connecting piece (64) may be installed between other adjacent plates of at least two plates having a microchannel. For example, there are two first plates (631) or two second plates (632).

[0124] In a specific embodiment, as illustrated in FIG. 20, the method for manufacturing the heat exchanger (6) may include: S11: providing at least two plates; S12: providing a connecting piece with solder installed on both sides; S13: stacking at least two plates and interposing the connecting piece between adjacent plates; and S14: heating the at least two plates and the connecting piece so that the solder welds the connecting piece to the plates located on both sides of the connecting piece.

[0125] 3-2. Connection between the laminated plates and the header tube

[0126] As illustrated in FIG. 21, the heat exchanger (6) comprises at least two plates (613) and at least one header tube (620). The plates (613) comprise a main body (671) and a connecting part (672). The main bodies (671) of the at least two plates (613) are stacked on top of each other. One end of the connecting part (672) is connected to the main body (671), and the other end of the connecting part (672) is connected to the header tube (620).

[0127] As illustrated in FIG. 22, at least two insertion holes (602) are installed on the wall of the header tube (620). The other end of the connecting portion (672) of the plate body (613) corresponds to the insertion hole (602) and is welded to the header tube (620). That is, the connecting portion (672) is located at the end of the plate body (613) and is used to fix it to the header tube (620). When the at least two plate bodies (613) are welded to the header tube (620), if the distance between the two adjacent plate bodies (613) at the welding site is short, the difficulty of welding may increase. Solder may flow along the gap between the two adjacent plate bodies (613), causing welding defects between the plate body (613) and the header tube (620), and there may be a risk of refrigerant flow leakage.

[0128] In this embodiment, the distance between two adjacent insertion holes (602) on the header tube (620) has a first gap (d1), and the distance between the main body portions (671) of two adjacent plates (613) has a second gap (d2). The first gap (d1) is larger than the second gap (d2). In this way, the distance between the connecting portions (672) of two adjacent plates (613) at the welding site can be increased. Additionally, capillary action between two adjacent plates (613) can be reduced, and the reliability of welding between the plates (613) and the header tube (620) can be improved.

[0129] Additionally, the first gap (d1) is 2 mm or more. For example, the first gap (d1) may be 2 mm or 3 mm, etc. This reduces capillary action between the connecting portions (672) of the plate body (613), which is advantageous for welding between the connecting portions (672) of the plate body (613) and the header tube (620). Additionally, the first gap (d1) is 6 mm or less. This increases the structural strength of the heat exchanger (6) and improves the reliability of the heat exchanger (6).

[0130] Optionally, the connecting portion (672) of at least some of the plates (613) is installed to be curved. For example, the connecting portion (672) of at least some of the plates (613) is installed in an arc shape. This curved installation method makes it easy to adjust the gap between the connecting portions (672) of two adjacent plates (613). It is also advantageous for welding and fixing between the plates (613) and the header tube (620), and reduces capillary action between two adjacent plates (613) during welding.

[0131] Optionally, one end of the connecting part (672) of the plate body (613) is installed in a curved shape, and the other end is installed in a straight shape, so that the processing process can be simplified.

[0132] Additionally, there is a third gap (d3) between the connecting portions (672) of at least some adjacently installed plates (613). The third gap (d3) gradually increases within at least some range from the main body (671) to the header tube (620). This gradually increases the distance between adjacent connecting portions (672), thereby reducing the capillary action between two adjacent plates (613).

[0133] In the embodiment illustrated in FIG. 21, the at least two plates (613) may include the first plate (631) and the second plate (632) described above.

[0134] In addition, in this embodiment, the number of first plates (631) is two, and the number of second plates (632) is two. The first plates (631) and the second plates (632) are installed sequentially in a stacked manner. Here, one second plate (632) is interposed between two first plates (631), and another second plate (632) is installed in a stacked manner on the outer side of one first plate (631) that is far from the interposed second plate (632). The header tube (620) includes a first header tube (621) and a second header tube (622) installed at a distance. A plurality of first microchannels for first refrigerant flow are formed on the first plate (631), and a plurality of second microchannels for second refrigerant flow are formed on the second plate (632). The second refrigerant flow absorbs heat from the first refrigerant flow along the flow process of a plurality of second microchannels (611) to supercool the first refrigerant flow. Alternatively, the first refrigerant flow absorbs heat from the second refrigerant flow along the flow process of a plurality of first microchannels (610) to supercool the second refrigerant flow. The connecting portion (672) of the first plate body (631) is welded and fixed to the first header pipe (621), and the connecting portion (672) of the second plate body (632) is welded and fixed to the second header pipe (622).

[0135] As illustrated in FIG. 21, the connecting portion (672) of the interposed second plate (632) can penetrate the first header tube (621) and be connected to the second header tube (622). The connecting portion (672) of the second plate (632) located on the outside can bypass the first header tube (621) and be welded to the second header tube (622). In this way, the number of insertion holes (602) on the first header tube (621) can be reduced, and the spacing between the insertion holes (602) can be increased. This is advantageous for the assembly of the heat exchanger (6) and improves the reliability of the heat exchanger (6). At the same time, interference with the refrigerant flow within the first header tube (621) can be reduced.

[0136] In another embodiment, the connecting portion (672) of the second plate (632) penetrates the first header tube (621) and is connected to the second header tube (622). In another embodiment, the connecting portion (672) of the first plate (631) penetrates the second header tube (622) and may be connected to the first header tube (621). This is not described repeatedly here.

[0137] Here, the quantities of the first plate (631) and the second plate (632) can be selected and set according to actual application demand. This is not specifically limited here.

[0138] The header tube (620) may adopt the various header tube installation methods described above, which are not repeated here.

[0139] In addition, the main body (671) of the plate (613) has a straight structure. Therefore, the main body (671) of the first plate (631) and the main body (671) of the second plate (632) can be directly welded by solder.

[0140] In another embodiment, the main body portion (671) of the first plate (631) and the main body portion (671) of the second plate (632) may be connected by a connecting piece having the solder described above. This is not described again here.

[0141] 4. Heat sink fins

[0142] As illustrated in FIGS. 23 and 24, the heat exchanger (6) includes a heat exchange body (61) and heat dissipation fins (65). The heat dissipation fins (65) may be installed on the heat exchange body (61) and connected to the heat exchange body (61) for heat conduction. By using the heat dissipation fins (65), the contact area between the heat exchange body (61) and the air is increased, thereby facilitating heat exchange with the air. This increases the heat exchange efficiency of the heat exchanger (6) and improves the heat dissipation effect of the heat exchanger (6).

[0143] Here, the heat dissipation fins (65) can be connected to the surface of the heat exchange body (61) by welding, bonding, or fastening connection methods.

[0144] Additionally, in the embodiment illustrated in FIG. 23, the heat exchange body (61) includes at least two plate assemblies (603) spaced apart in parallel. Heat dissipation fins (65) are installed on the at least two plate assemblies (603).

[0145] The heat exchanger (6) further includes a fixed plate (66). The fixed plate (66) simultaneously covers the heat dissipation fins (65) on the at least two plate assemblies (603). Additionally, the fixed plate (66) is positioned on one side of the heat dissipation fins (65) away from the plate assemblies (603) to form a heat dissipation duct. In this way, the entire fixed plate (66) structure is adopted for sealing the heat dissipation fins (65). This results in fewer parts, making the production of the heat exchanger (6) simple and highly reliable. Furthermore, the formed heat dissipation duct can improve the heat dissipation effect. The airflow direction defined by the heat dissipation duct is installed along the spacing direction of the plate assemblies. That is, it is installed perpendicular to the extension direction of the plate assemblies (603) to increase the heat dissipation efficiency of the heat dissipation fins (65). In another embodiment, the airflow direction defined by the heat dissipation duct may be installed in the extension direction of the plate assembly (603) or at an angle different from the extension direction of the plate assembly (603).

[0146] As illustrated in FIG. 23, the fixed plate (66) includes an upper plate (661). The upper plate (661) simultaneously covers the heat dissipation fins (65) on the at least two plate assembly (603), thereby facilitating the sealing of the heat dissipation fins (65).

[0147] Additionally, the fixed plate (66) further includes at least one side plate (662). The side plate (662) is connected to the top plate (661) so as to be folded and extends toward the plate assembly (603). By sealing the heat dissipation duct through the side plate (662), the parts of the heat exchanger (6) are reduced and the sealability of the heat dissipation duct is improved.

[0148] Specifically, in one embodiment, the fixed plate (66) may include a top plate (661) and a side plate (662). The side plate (662) is connected to one end of the top plate (661) by being bent. One end of the heat dissipation fin (65) contacts the side plate (662) to close the heat dissipation duct. The other end of the heat dissipation fin (65) can be assembled by joining it with other parts or can be made to contact the box body of the electric control box described later so that the heat dissipation fin (65) forms a complete duct. In this way, the assembly of the heat dissipation fin (65) can be simplified and the assembly efficiency improved.

[0149] In another embodiment, the number of side plates (662) is two. The two side plates (662) are installed spaced apart in a vertical direction following the spacing direction of at least two plate assemblies (603). The top plate (661) is connected to each of the two side plates (662) by being folded to form a receiving space. The heat dissipation fins (65) are located within the receiving space, that is, between the two side plates (662). In this way, the fixing plate (66) can completely seal the heat dissipation fins (65) to form an overall heat dissipation duct. Thus, the number of parts is reduced, and the packaging process of the heat dissipation fins (65) is further simplified, making the production of the heat exchanger (6) simple and reliable. At the same time, the heat exchange capability is also improved.

[0150] Optionally, as shown in FIG. 24, the heat dissipation fins (65) are a corrugated structure formed by extruding a sheet material. The crests and troughs of the corrugated structure are in contact with surfaces facing each other, such as the upper plate (661) and the plate assembly (603).

[0151] Optionally, the number of heat dissipation fins (65) may be at least two. As illustrated in FIG. 25, the number of heat dissipation fins (65) may be equal to the number of plate assembly (603). Each heat dissipation fin (65) is installed on the corresponding plate assembly (603). Each heat dissipation fin (65) may have a width in the vertical direction along the extension direction of the plate assembly (603) that is equal to the width of the corresponding plate assembly (603). Thus, heat exchange capacity is improved and material costs can be saved.

[0152] As illustrated in FIG. 25, each heat dissipation fin (65) can be attached to a plate assembly (603). Multiple heat dissipation fins (65) are spaced apart from each other along the spacing direction of the plate assembly (603). During the welding process, the temperature of the gap between the plates (613) may be higher than the temperature of the plates (613). This installation can prevent the heat dissipation fins (65) from melting and deforming. By installing multiple spaced heat dissipation fins (65), not only can the heat exchange efficiency of the heat dissipation fins (65) be ensured, but materials can also be saved and production costs lowered.

[0153] Optionally, as illustrated in FIG. 26, the number of heat dissipation fins (65) may be one. That is, the heat dissipation fins (65) are installed integrally and are installed simultaneously on at least two plate assemblies (603). Here, the width of the heat dissipation fins (65) in the vertical direction along the extension direction of the plate assemblies (603) may be greater than or equal to the width of the heat exchange body (61). In this way, the number of integral heat dissipation fins (65) is relatively small and the surface area is relatively large. On the one hand, it is easy to connect the heat dissipation fins (65) to the heat exchange body (61), and the mounting efficiency of the heat dissipation fins (65) and the heat exchange body (61) can be improved. On the other hand, the contact area between the heat dissipation fins (65) and the air is also increased, and the heat exchange effect may be enhanced.

[0154] Additionally, the fixed plate (66) is installed with both ends open along the spacing direction of the at least two plate assemblies (603). Thus, the direction of airflow within the heat dissipation duct is installed along the spacing direction of the at least two plate assemblies (603). Furthermore, the direction of refrigerant flow within the plate assemblies (603) is perpendicular to the spacing direction of the at least two plate assemblies (603). Therefore, the heat dissipation effect of the heat dissipation duct is enhanced, and the heat exchange efficiency of the entire heat exchanger (6) is improved.

[0155] Here, a microchannel may be installed within each plate assembly (603). For example, the various plate and microchannel fitting methods described above may be adopted. This is not repeated here.

[0156] As understood by those skilled in the art, it should be noted that the heat dissipation fin (65) structure described above is applicable to various types of heat exchangers (6) described in this application, and is not limited to any specific embodiment.

[0157] 5. Heat exchanger as a radiator

[0158] The present application may use the heat exchanger (6) as a radiator (hereinafter referred to as "radiator (6)"). The radiator (6) comprises a heat exchange body (61) and a header tube assembly (62). Additionally, the radiator (6) is installed to perform heat dissipation for electronic components within an electric control box (7). As understood by those skilled in the art, it should be noted that the radiator (6) mentioned herein includes various types of heat exchangers as described above, and is not limited to any specific embodiment.

[0159] In one embodiment, the radiator (6) is used as an economizer for the air conditioning system (1), and at the same time, is used to replace the module radiator in the electric control box (7) to perform heat dissipation for the electric control box (7). This simplifies the pipeline assembly and module quantity of the air conditioning system (1), thereby reducing costs.

[0160] Additionally, as illustrated in FIG. 27, the electric control box (7) includes a box body (72) and a heat dissipator (6). A mounting cavity (721) is installed in the box body (72). An electronic component (71) is installed in the mounting cavity (721). The heat dissipator (6) is installed within the mounting cavity (721) and is used to provide heat dissipation for the electronic component (71) within the mounting cavity (721). In another embodiment, the heat dissipator (6) may be installed outside the box body (72). It may also be installed to provide heat dissipation for the electronic component (71) within the mounting cavity (721).

[0161] As illustrated in FIG. 27, the box body (72) includes a top plate (not shown, installed opposite to the bottom plate (723) and covering the opening of the mounting cavity (721), a bottom plate (723), and a perimeter side plate (724). The top plate and the bottom plate (723) are installed spaced apart to face each other. The perimeter side plate (724) is connected to the top plate and the bottom plate (723) to form the mounting cavity (721).

[0162] Specifically, in FIG. 27, the bottom plate (723) and the top plate are rectangular. There are four perimeter side plates (724). Each of the four perimeter side plates (724) is connected to the corresponding side of the bottom plate (723) and the top plate, and surrounds the bottom plate (723) and the top plate to form a rectangular electric control box (7). The length of the long side of the bottom plate (723) is the length of the electric control box (7), and the length of the short side of the bottom plate (723) is the width of the electric control box (7). The height of the perimeter side plate (724) perpendicular to the bottom plate (723) is the height of the electric control box (7). As shown in FIG. 27, the length of the electric control box (7) in the X direction is the length of the electric control box (7). The length of the electric control box (7) in the Y direction is the height of the electric control box (7). The length of the electric control box (7) in the Z direction is the width of the electric control box (7).

[0163] In the following embodiments, the specific combination method of the radiator (6) and the electric control box (7) is described in detail.

[0164] 5-1. Heat exchanger body shape

[0165] In one embodiment, the heat exchange body (61) is installed in a straight line. As shown in FIG. 18, the heat exchange body (61) has a total length, a total width, and a total height. Here, the total length is the length along the extension direction of the heat exchange body (61). That is, it is the length along the X direction shown in FIG. 18 of the heat exchange body (61). The total width is the length of the heat exchange body (61) in a direction perpendicular to the extension direction of the heat exchange body (61) and perpendicular to the plane on which the heat exchange body (61) is located. That is, it is the length along the Y direction shown in FIG. 18 of the heat exchange body (61). The total height is the length along the Z direction shown in FIG. 18 of the heat exchange body (61). Here, the plane on which the heat exchange body (61) is located refers to the plane on which the header tube assembly (62) is located, i.e., the XOZ plane shown in FIG. 18.

[0166] In this embodiment, as shown in FIG. 27, the heat exchange body (61) may be installed on the bottom plate (723) of the electric control box (7). Alternatively, the heat exchange body (61) may be installed on the perimeter side plate (724) of the electric control box (7). In another embodiment, the heat exchange body (61) may be fixed to other locations on the electric control box (7) depending on the installation location of electronic components (71), etc. The embodiments of this application are not specifically limited thereto.

[0167] When the heat exchange body (61) is linear as shown in FIG. 18, the heat exchange body (61) may be installed in contact with the bottom plate (723) or spaced apart from the bottom plate (723). In this way, by fully utilizing the longitudinal dimensions of the bottom plate (723), the heat exchange body (61) can be installed as long as possible to improve the heat exchange effect. In another embodiment, the heat exchange body (61) may be installed in contact with the circumferential side plate (724) or spaced apart from the circumferential side plate (724). The embodiments of the present application do not specifically limit this.

[0168] Additionally, referring to FIG. 28, in order to reduce the overall length of the heat exchange body (61), the heat exchange body (61) can be divided into a first extension (617) and a second extension (618). The second extension (618) is connected to the end of the first extension (617) and is bent toward one side of the first extension (617), so that the heat exchange body (61) becomes L-shaped.

[0169] The heat exchange body (61) is bent to form a first extension (617) and a second extension (618) that are connected by the bending. Through this, the total length of the heat exchange body (61) can be reduced under the condition that the heat exchange body (61) has a sufficiently long extension length. Furthermore, the length along the X direction of the electric control box (7) that fits with the radiator (6) can be reduced, thereby reducing the volume of the electric control box (7).

[0170] Specifically, the first extension (617) can be installed parallel to the bottom plate (723). By fully utilizing the longitudinal dimensions of the bottom plate (723), the heat exchange effect can be improved by installing a heat exchange body (61) that is as long as possible. The second extension (618) can be installed parallel to the perimeter side plate (724). This allows the space occupied by the second extension (618) in the X direction to be reduced.

[0171] Alternatively, the first extension (617) may be installed parallel to one of the perimeter side plates (724). Additionally, the second extension (618) may be installed parallel to the perimeter side plate (724) adjacent to the corresponding perimeter side plate (724) so ​​that the radiator (6) can be installed on one side of the mounting cavity (721).

[0172] Optionally, the first extension (617) may be in contact with the bottom plate (723) or installed spaced apart from the bottom plate (723). The second extension (618) may be in contact with the perimeter side plate (724) or installed spaced apart from the perimeter side plate (724). The embodiments of the present application are not specifically limited thereto.

[0173] Additionally, as shown in FIG. 28, the number of second extensions (618) may be one. One second extension (618) is connected to one end of the first extension (617), so that the heat exchange body (61) becomes L-shaped.

[0174] As illustrated in FIG. 29, the number of second extensions (618) may be two. Each of the two second extensions (618) is connected to opposite ends of the first extension (617) and is bent toward the same side of the first extension (617).

[0175] Specifically, two second extensions (618) may be spaced apart so as to be parallel to both opposing ends of the first extension (617). This allows the heat exchange effect of the heat exchange body (61) to be secured while further reducing the overall length of the heat exchange body (61) and reducing the volume of the radiator (6). In addition, compared to positioning the two second extensions (618) on opposite sides of the first extension (617), installing the two second extensions (618) so as to be bent on the same side of the first extension (617) may also make it easier to shorten the overall width of the radiator (6).

[0176] Additionally, two second extensions (618) can be installed vertically with respect to the first extension (617) to form a U-shaped heat exchange body (61). In this way, not only can the overall length of the heat exchange body (61) be reduced, but the space occupied by the second extensions (618) in the X direction can also be reduced. Furthermore, interference between the two second extensions (618) and the electronic component (71) installed in the mounting cavity (721) can be prevented.

[0177] Alternatively, two second extensions (618) may be installed at an angle relative to the first extension (617). Additionally, the angle of inclination of the two second extensions (618) relative to the first extension (617) may be the same or different, and the overall width of the electric control box (7) may be shortened.

[0178] Additionally, the extension length of the first extension part (617) is installed to be greater than the extension length of the second extension part (618). Furthermore, the first extension part (617) is installed to follow the length direction of the electric control box (7), and the second extension part (618) is installed to follow the width or height direction of the electric control box (7).

[0179] Additionally, as illustrated in FIG. 27, the number of radiators (6) installed in the mounting cavity (721) may be one. One radiator (6) may be installed in the mounting cavity (721) so as to extend along the longitudinal direction of the box body (72). Alternatively, one radiator (6) may be installed in the mounting cavity (721) so as to extend along the height direction of the box body (72).

[0180] Alternatively, the number of radiators (6) installed in the mounting cavity (721) may be at least two. For example, the number of radiators (6) may be two, three, four, or five, etc. By installing a larger number of radiators (6), the heat dissipation effect of the electric control box (7) can be improved.

[0181] 5-2. Installation of a radiator inside the electrical control box

[0182] As will be understood by those skilled in the art, various types of heat dissipators (6) disclosed in this application may be installed within the mounting cavity (721) of the electric control box (7) or applied to the heat dissipation of the electric control box (7). Additionally, they may be connected to the electronic components (71) to conduct heat directly or indirectly.

[0183] Additionally, as shown in FIG. 27, the radiator (6) is installed in the mounting cavity (721) of the electric control box (7). Specifically, the radiator (6) can be connected to an electronic component (71) installed in the mounting cavity (721) to conduct heat, and can be used to dissipate heat from the electronic component (71).

[0184] Specifically, the electronic component (71) can be connected to the heat exchange body (61) to conduct heat. The electronic component (71) can be connected to any location on the heat exchange body (61) to conduct heat.

[0185] When the heat exchange body (61) in the radiator (6) is linear (i.e., the radiator (6) is I-shaped), the electronic component (71) can be installed at any location on the heat exchange body (61). This method is advantageous for assembling the electronic component (71). For example, the electronic component (71) can be installed at an intermediate location on the heat exchange body (61), or the electronic component (71) can be installed at both ends of the heat exchange body (61). Optionally, the electronic component (71) can be installed on one side of the heat exchange body (61). Depending on the actual application situation, the electronic component (71) can also be installed on opposite sides of the heat exchange body (61).

[0186] In the embodiment illustrated in FIGS. 28 and 29, when the heat sink (6) is L-shaped or U-shaped, the electronic component (71) can be connected to the first extension (617) for heat conduction. Additionally, the electronic component (71) can be installed on the same side of the second extension (618) and the first extension (617) to shorten the height of the electric control box (7), i.e., the dimensions along the Y direction.

[0187] Alternatively, the electronic component (71) can be connected to the second extension (618) for thermal conduction. Specifically, the electronic component (71) can be installed on one side of the second extension (618) facing the first extension (617) to shorten the length of the electric control box (7), i.e., the dimension along the X direction.

[0188] Alternatively, some of the electronic components (71) may be installed on the first extension (617) and some on the second extension (618) to distribute the electronic components (71) evenly.

[0189] As illustrated in FIGS. 27 and 30, a heat dissipation fixing plate (74) may be installed within the electric control box (7). After installing an electronic component (71) on the heat dissipation fixing plate (74), the heat dissipation fixing plate (74) is connected to the heat exchange body (61). The electronic component (71) and the heat exchange body (61) are connected via the heat dissipation fixing plate (74) to allow for heat conduction. This allows for a significant improvement in the mounting efficiency of the electronic component (71).

[0190] Here, the heat dissipation fixing plate (74) can be made of a metal plate or an alloy plate with excellent thermal conductivity. For example, the heat dissipation fixing plate (74) can be made of an aluminum plate, a copper plate, an aluminum alloy plate, etc., to improve thermal conductivity efficiency.

[0191] Alternatively, as shown in FIG. 31, a heat tube (741) may be embedded within the heat dissipation fixing plate (74). The heat tube (741) is used to rapidly conduct heat from a relatively concentrated high-density heat source and diffuse it across the surface of the entire heat dissipation fixing plate (74). This evenly distributes heat on the heat dissipation fixing plate (74), thereby enhancing the heat exchange effect between the heat dissipation fixing plate (74) and the heat exchange body (61).

[0192] Here, as shown in the upper attached drawing of FIG. 31, the heat pipe (741) may be installed in the form of a long strip. The number of heat pipes (741) may include multiple ones. Multiple heat pipes (741) may be spaced apart in parallel. Alternatively, as shown in the lower attached drawing of FIG. 31, multiple heat pipes (741) may be connected sequentially to form a ring shape or a frame shape. The embodiments of the present application do not specifically limit this.

[0193] 5-3. Installing a radiator on the outside of the electrical control box

[0194] As shown in FIG. 32, the radiator (6) is installed outside the electric control box (7). An assembly (726) may be opened on the box body (72) of the electric control box (7), and an electronic component (71) is connected to the radiator (6) by the assembly (726) to conduct heat.

[0195] Specifically, as shown in FIG. 32, an electronic component (71) is installed on one side surface of a heat dissipation fixing plate (74) far from the heat dissipation radiator (6).

[0196] Alternatively, as illustrated in FIG. 33, a heat tube (741) may be installed to connect the electronic component (71) and the radiator (6) for heat conduction. For example, the heat tube (741) may include an absorption section (741a) and a heat dissipation section (741b). The absorption section (741a) of the heat tube (741) may be inserted into the interior of the mounting cavity (721) and connected to the electronic component (71) for heat conduction, thereby allowing it to be used to absorb heat from the electronic component (71). The heat dissipation section (741b) of the heat tube (741) may be installed outside the electric control box (7) and connected to the radiator (6) for heat conduction, thereby allowing the heat dissipation section (741b) of the heat tube (741) to be dissipated to the radiator (6).

[0197] 5-4 Placement of Heat Dissipation Fins and Electronic Components

[0198] In the embodiment illustrated in FIGS. 23 to 26, the radiator (6) includes heat dissipation fins (65). When the radiator (6) having heat dissipation fins (65) is applied within an electric control box (7), the contact area between the heat exchange body (61) and the air within the electric control box (7) can be increased using the heat dissipation fins (65). This facilitates heat exchange with the air, lowers the temperature within the mounting cavity (721), and protects the electronic components (71).

[0199] Optionally, the electronic component (71) and the heat dissipation fin (65) can be installed on the same side of the heat exchange body (61), and the electronic component (71) and the heat dissipation fin (65) can be installed staggered to prevent interference between the electronic component (71) and the heat dissipation fin (65). Additionally, if the distance between the electronic component (71) and the heat dissipation fin (65) is installed relatively far apart, the temperature of the refrigerant in contact with both the heat dissipation fin (65) and the electronic component (71) can be lowered further, thereby improving the heat dissipation effect of the heat exchange body (61).

[0200] In another embodiment, the electronic component (71) is installed on one side of the heat exchange body (61), and the heat dissipation fin (65) is installed on the other side of the heat exchange body (61). Specifically, the heat dissipation fin (65) may be installed at any location on the other side of the heat exchange body (61).

[0201] In one embodiment, the heat dissipation fin (65) may extend to the outside of the electric control box (7). For example, an assembly opening is opened on the box body (72), and a heat exchange body (61) is installed inside the box body (72) and connected to conduct heat with the electronic component (71). One side of the heat dissipation fin (65) is connected to conduct heat with the heat exchange body (61) and extends to the outside of the box body (72) through the assembly opening. Additionally, the heat dissipation capacity of the heat exchange body (61) can be further enhanced through air cooling assistance.

[0202] 6. Install electronic components in locations where the radiator temperature is relatively high.

[0203] Referring to FIG. 34, the electric control box (7) of the present embodiment includes a box body (72), a radiator (6), and an electronic component (71). A mounting cavity (721) is installed in the box body (72). The radiator (6) is installed at least partially within the mounting cavity (721), and the electronic component (71) is installed within the mounting cavity (721). Here, since the structure of the box body (72) and the radiator (6) is generally the same as that of the above-described embodiment, the description of the above-described embodiment is referenced.

[0204] Optionally, the heat exchanger body (61) may be entirely installed within the mounting cavity (721) of the electric control box (7). The heat exchanger body (61) may be partially installed within the mounting cavity (721) of the electric control box (7), and partially extend out of the electric control box (7) to be used for connecting to the header pipe assembly (62) and the external pipeline.

[0205] The flow of the refrigerant further lowers the temperature of the radiator (6). Due to the heat generated by the electronic components (71) inside the electric control box (7), the temperature inside the mounting cavity (721) of the electric control box (7) increases. When air with a relatively high temperature inside the electric control box (7) comes into contact with the radiator (6), it is prone to condensation and further forms condensation on the surface of the radiator (6). If the generated condensation flows to the location of the electronic components (71), the electronic components (71) are prone to short circuits or damage, and in severe cases, there is a risk of fire.

[0206] Accordingly, as illustrated in FIG. 34, the heat exchange body (61) can be divided into a first stage (61a) and a second stage (61b) along the flow direction of the refrigerant flow. When the heat exchange body (61) is in operation, the temperature of the heat exchange body (61) gradually decreases in the direction from the first stage (61a) to the second stage (61b). That is, the temperature of the first stage (61a) is higher than the temperature of the second stage (61b). An electronic component (71) is installed in a position close to the first stage (61a) and is connected to the heat exchange body (61) to conduct heat. The heat exchange body (61) must perform heat exchange with the internal environment of the electric control box (7) or its internal components. Therefore, it should be noted that the temperature of the heat exchange body (61) described above and below refers to the surface temperature of the heat exchange body (61). Specifically, the change in the surface temperature of the heat exchange body (61) is determined by the heat exchange channel adjacent to the surface. For example, if the heat exchange channel adjacent to the surface of the heat exchange body (61) is the main channel, the refrigerant flow in the main channel is continuously absorbed by the refrigerant flow in the auxiliary channel as it flows. Therefore, the surface temperature of the heat exchange body (61) gradually decreases along the direction of the refrigerant flow in the main channel. At this time, the first stage (61a) is located upstream of the second stage (61b) along the direction of the refrigerant flow in the main channel. If the heat exchange channel adjacent to the surface of the heat exchange body (61) is the auxiliary channel, the surface temperature of the heat exchange body (61) gradually increases along the direction of the refrigerant flow in the auxiliary channel. At this time, the first stage (61a) is located downstream of the second stage (61b) along the direction of the refrigerant flow in the auxiliary channel.

[0207] Accordingly, depending on the temperature change on the heat exchange body (61) during operation, the heat exchange body (61) is divided into a first stage (61a) with a relatively high temperature and a second stage (61b) with a relatively low temperature. Since the temperature difference between the first stage (61a), which has a relatively high temperature, and the hot air is relatively small, no condensate is generated, or the amount of generated condensate is relatively small. By installing the electronic component (71) in a position close to the first stage (61a), the probability of the electronic component (71) coming into contact with the condensate is reduced, and the electronic component (71) can be protected.

[0208] It should be noted that since air conditioners generally have cooling and heating modes, there may be situations where the refrigerant flows in opposite directions in these two modes. In this case, the temperature of the heat exchange body (61) exhibits a contrasting trend of change from the first stage (61a) to the second stage (61b). That is, in one mode, the temperature of the heat exchange body (61) gradually decreases from the first stage (61a) to the second stage (61b), whereas in the other mode, the temperature of the heat exchange body (61) gradually increases from the first stage (61a) to the second stage (61b). In this embodiment, it is preferably ensured that the temperature of the heat exchange body (61) gradually decreases from the first stage (61a) to the second stage (61b) in the cooling mode. The reason for this is as follows.

[0209] When the ambient temperature is relatively low, for example, when the air conditioner is operated for heating in winter, the air temperature inside the electric control box (7) is relatively low. At this time, the temperature difference between the air inside the electric control box (7) and the radiator (6) is relatively small, so the air does not easily condense and form condensate. When the ambient temperature is relatively high, for example, when the air conditioner is operated for cooling in summer, the air temperature inside the electric control box (7) is relatively high. At this time, the temperature difference between the air inside the electric control box (7) and the radiator (6) is relatively large, so the air easily condenses and forms condensate. Therefore, in this embodiment, at least in the cooling mode of the air conditioner, the temperature of the heat exchange body (61) can be set to gradually decrease as it goes from the first stage (61a) to the second stage (61b). This prevents the radiator (6) from generating condensate in the cooling mode.

[0210] Additionally, installing the electronic component (71) at a position close to the first stage (61a) means that the electronic component (71) has a first distance between the thermally conductive connection position on the heat exchange body (61) and the first stage (61a), and a second distance between it and the second stage (61b). The first distance is shorter than the second distance.

[0211] Specifically, the temperature of the heat exchange body (61) gradually decreases as it goes from the first stage (61a) to the second stage (61b). Therefore, the temperature of the first stage (61a) is the highest, and the temperature of the second stage (61b) is the lowest. The higher the temperature of the heat exchange body (61) and the smaller the temperature difference with the air inside the electric control box (7), the less easily the condensate condenses. The lower the temperature of the heat exchange body (61) and the larger the temperature difference with the hot air, the more easily the condensate condenses. In other words, as it goes from the first stage (61a) to the second stage (61b) of the heat exchange body (61), the probability of condensate generation gradually increases. Therefore, by installing the electronic component (71) close to the stage where the temperature of the heat exchange body (61) is higher—that is, by installing it in a location where condensate does not easily accumulate—the risk of the electronic component (71) coming into contact with condensate is reduced, thereby protecting the electronic component (71).

[0212] Additionally, as shown in FIG. 34, the extension direction of the heat exchange body (61) can be installed in a vertical direction, and the first stage (61a) can be installed on the upper part of the second stage (61b). In this way, when condensation is generated in the heat exchange body (61) at a location close to the second stage (61b), the condensation can flow down in a vertical direction. That is, the condensation flows away from the electronic component (71), thereby preventing the electronic component (71) from coming into contact with the condensation.

[0213] Alternatively, if necessary, the extension direction of the heat exchange body (61) may be installed in a horizontal direction. This makes it easy to prevent condensate generated at a location close to the second stage (61b) from rapidly separating from the heat exchange body (61) by the action of gravity and coming into contact with the electronic component (71). Alternatively, in another embodiment, the extension direction of the heat exchange body (61) may be installed at an angle with respect to the horizontal direction. The embodiments of the present application do not specifically limit this.

[0214] It can be understood that the structure of the radiator (6) in this embodiment can be installed in the same way as the above-described embodiment. That is, a bent heat exchange body (61) may be adopted. Alternatively, the structure of the radiator (6) in this embodiment may adopt a straight heat exchange body (61). Alternatively, other types of radiators may be adopted in addition to adopting the radiator (6) with the above-described microchannel. The embodiments of this application do not limit the specific structure of the radiator (6). Furthermore, other embodiments of this application that apply the radiator to an electric control box may adopt various radiators disclosed in this application or other radiators known in the art.

[0215] 7. Condensate protection

[0216] Referring to FIG. 35, the electric control box (7) of the present embodiment includes a box body (72), a mounting plate (76), electronic components (71), and a heat sink (6).

[0217] Here, a mounting cavity (721) is installed in the box body (72). A mounting plate (76) is installed within the mounting cavity (721) so that the mounting cavity (721) forms a first chamber (7212) and a second chamber (7214) located on both sides of the mounting plate (76). An electronic component (71) is installed within the second chamber (7214). At least a portion of the heat exchange body (61) is installed within the first chamber (7212) and connected to the electronic component (71) for heat conduction. The mounting plate (76) is used to block condensate on the radiator (6) from flowing into the second chamber (7214).

[0218] A mounting plate (76) is installed to separate the mounting cavity (721) within the electric control box (7), and the heat exchange body (61) and the electronic component (71) are installed in the first chamber (7212) and the second chamber (7214), respectively, which are independent of each other. By doing so, the electronic component (71) is completely isolated from the condensate, thereby preventing the electronic component (71) from coming into contact with the condensate and causing a short circuit or damage.

[0219] In addition, a heat dissipation fixing plate (74) can be adopted to indirectly connect the electronic component (71) and the heat exchange body (61).

[0220] Specifically, an avoidance hole (762) can be opened at a position corresponding to the mounting plate (76) and the heat dissipation fixing plate (74). The heat dissipation fixing plate (74) is connected to the heat exchange body (61) to block the avoidance hole (762). The electronic component (71) is installed on one side of the heat dissipation fixing plate (74) far from the heat exchange body (61). In this way, the electronic component (71) and the heat exchange body (61) can be connected by heat conduction using the heat dissipation fixing plate (74). Additionally, the first chamber (7212) and the second chamber (7214) can be separated using the heat dissipation fixing plate (74). By doing so, condensate can be prevented from flowing into the second chamber (7214) where the electronic component (71) is installed through the avoidance hole (762), thereby preventing the condensate from coming into contact with the electronic component (71).

[0221] Additionally, if a relatively large amount of condensate is generated on the heat exchange body (61), the condensate may fall off under the action of gravity after accumulating. The fallen condensate is prone to sputtering, which can be dangerous to the circuits within the electric control box (7). Furthermore, relatively dispersed condensate does not help to be discharged from the electric control box (7).

[0222] Accordingly, as illustrated in FIG. 35, a flow guide plate (77) can be installed within the electric control box (7). The flow guide plate (77) is installed on the lower side of the radiator (6) and is used to collect condensate falling from the radiator (6). By installing the flow guide plate (77), the drop height of the condensate can be lowered to prevent sputtering of the condensate. Additionally, since it exhibits a constant accumulation effect on the condensate, it is easy to discharge the collected condensate together from the electric control box (7).

[0223] As illustrated in FIG. 35, the flow guide plate (77) is fixed on the bottom plate (723) of the electric control box (7). One end of the flow guide plate (77) is connected to the bottom plate (723), and the other end of the flow guide plate (77) extends toward the interior of the first chamber (7212). The radiator (6) falls into the interior of the flow guide plate (77) along a vertical projection. In this way, it is ensured that all condensate falling from the radiator (6) is located on the flow guide plate (77), thereby preventing the condensate from falling to other locations in the electric control box (7).

[0224] It can be understood that the radiator (6) may be installed on the mounting plate (76). At this time, one end of the flow guide plate (77) is connected to the mounting plate (76), and the other end of the flow guide plate (77) extends toward the interior of the first chamber (7212). The radiator (6) falls into the interior of the flow guide plate (77) along a vertical projection.

[0225] Additionally, as illustrated in FIG. 36, a drain (725) may be further opened on the lower wall of the box body (72) so that condensate on the flow guide plate (77) can be immediately and easily discharged from the electric control box (7). Additionally, the flow guide plate (77) may be installed at an angle to the lower wall of the box body (72). Condensate is guided through the flow guide plate (77) and then discharged from the box body (72) through the drain (725).

[0226] Specifically, a drain (725) can be opened on the perimeter side plate (724) of the electric control box (7). The flow guide plate (77) is connected to the mounting plate (76) or the bottom plate (723) of the box body (72) and is installed obliquely toward the direction of the drain (725). After the condensate falls onto the flow guide plate (77), it collects at the location of the drain (725) along the oblique flow guide plate (77) and can be discharged from the electric control box (7) through the drain (725).

[0227] Here, the quantity and size of the drain (725) can be flexibly set according to the amount of condensate. The embodiments of the present application do not specifically limit this.

[0228] In this embodiment, the flow direction of the refrigerant flow within the heat exchange body (61) can be installed in a horizontal direction. That is, the extension direction of the heat exchange body (61) can be installed in a horizontal direction. On the one hand, this shortens the flow path of the condensate on the heat exchange body (61), allowing the condensate to fall onto the flow guide plate (77) as quickly as possible under the action of gravity. Thus, the condensate can be easily discharged immediately from the electric control box (7) and prevent contact with the electronic component (71) inside the mounting cavity (721). On the other hand, by preventing interference between the flow guide plate (77) and the heat exchange body (61), a relatively long heat exchange body (61) can be installed, thereby improving the heat exchange efficiency of the radiator (6).

[0229] In another embodiment, as shown in FIG. 37, as the flow guide plate (77) moves from the middle region toward both ends, the height of the flow guide plate (77) along the vertical direction gradually decreases. Thus, condensate falling on the flow guide plate (77) flows toward both ends of the flow guide plate (77). That is, the flow guide plate (77) is installed in an inverted V shape. In this way, the overall height along the vertical direction of the flow guide plate (77) is lowered, thereby preventing interference between the flow guide plate (77) and other parts within the electric control box (7). Additionally, condensate falling from the radiator (6) onto the flow guide plate (77) can be quickly discharged.

[0230] Additionally, as illustrated in FIG. 37, a first drain (771) and a second drain (772) corresponding to each end of the flow guide plate (77) are installed in the box body (72) to discharge condensate flowing toward both ends of the flow guide plate (77). Condensate falling on the flow guide plate (77) flows toward both ends of the flow guide plate (77). Additionally, it is discharged from the box body (72) through the first drain (771) and the second drain (772).

[0231] In another embodiment, as shown in FIG. 38, as the flow guide plate (77) moves from the middle area toward both ends, the height of the flow guide plate (77) along the vertical direction gradually increases. Accordingly, condensate falling on the flow guide plate (77) flows toward the middle area of ​​the flow guide plate (77). That is, the flow guide plate (77) can be installed in a V-shape. In this way, the condensate can be collected through the flow guide plate (77) into the middle area of ​​the flow guide plate and discharged from the middle area.

[0232] Additionally, as shown in FIG. 38, a drain (725) corresponding to the middle area position of the flow guide plate (77) is installed in the box body (72) to discharge condensate flowing into the middle area of ​​the flow guide plate (77). This method is advantageous for collecting and discharging condensate.

[0233] The number and size of the above drain (725), the first drain (771), and the second drain (772) can be flexibly installed according to the amount of condensate. The embodiments of the present application do not specifically limit this.

[0234] The above-mentioned flow guide plate (77) may be mounted to the electric control box (7) in other mounting ways and installed below the heat radiator (6) for discharging heat from the electronic components (71) inside the electric control box (7). It should be noted that this is not limited to the above-described embodiment.

[0235] 8. Install electronic components upstream of the radiator and heat fins downstream.

[0236] As illustrated in FIG. 39, a mounting cavity (721) is installed in the box body (72), and at least a portion of the heat exchange body (61) is installed within the mounting cavity (721). An electronic component (71) is connected to the heat exchange body (61) to conduct heat at a first position, and a heat dissipation fin (65) is connected to the heat exchange body (61) to conduct heat at a second position. Here, the first position and the second position are installed spaced apart from each other along the flow direction of the refrigerant flow of the heat exchange body (61). As described above, the refrigerant flow mentioned herein may be the main path refrigerant flow of the air conditioning system illustrated in FIG. 1 to 4, or it may be an auxiliary path refrigerant flow.

[0237] In this embodiment, the electronic component (71) and the heat dissipation fin (65) are installed spaced apart from each other along the flow direction of the refrigerant flow of the heat exchange body (61), thereby allowing sufficient use of the space on the heat exchange body (61). Not only can heat dissipation be performed on the electronic component (71) using the heat exchange body (61), but the heat dissipation fin (65) can also be used to lower the temperature inside the mounting cavity (721) of the electric control box (7) and protect the electronic component (71) installed inside the mounting cavity (721).

[0238] Additionally, the heat exchange body (61) includes a first stage (61a) and a second stage (61b) installed spaced apart along the flow direction of the refrigerant flow. Here, the temperature of the heat exchange body (61) gradually decreases in the direction from the first stage (61a) to the second stage (61b). That is, the temperature of the first stage (61a) is higher than the temperature of the second stage (61b). The first position is installed closer to the first stage (61a) than the second position.

[0239] Specifically, during the operation of the heat exchange body (61), the temperature of the surface of the heat exchange body (61) changes according to the flow direction of the refrigerant flow, forming a first stage (61a) with a relatively high temperature and a second stage (61b) with a relatively low temperature. Since the temperature difference between the first stage (61a), which has a relatively high temperature, and the hot air inside the mounting cavity (721) is relatively small, condensation is not easily generated. Therefore, electronic components (71) can be installed close to the first stage (61a). That is, the first position is installed close to the first stage (61a). Since the temperature difference between the second stage (61b), which has a relatively low temperature, and the hot air inside the mounting cavity (721) is relatively large, condensation is easily generated. Therefore, heat dissipation fins (65) can be installed close to the second stage (61b). On the one hand, the heat dissipation fin (65), which has a relatively low temperature, ensures that there is a sufficiently large temperature difference between the heat dissipation fin (65) and the hot air, thereby facilitating heat dissipation for the electric control box (7). On the other hand, the condensate formed by condensation on the heat dissipation fin (65) may evaporate under the action of the hot air. As the condensate evaporates and absorbs heat, the temperature of the refrigerant flow is further lowered, thereby improving the heat exchange effect of the radiator (6).

[0240] 8-1. Acceleration of Heat Dissipation Airflow Velocity

[0241] Additionally, as shown in FIG. 40, a heat dissipation fan (78) may be installed inside the electric control box (7). The heat dissipation fan (78) is used to form a heat dissipation airflow acting on the heat dissipation fins (65) inside the electric control box (7). This can accelerate the flow velocity of the heat dissipation airflow, thereby improving the heat exchange effect.

[0242] Optionally, the cooling fan (78) can be installed in a position close to the cooling fin (65) so as to act directly on the cooling fin (65).

[0243] Alternatively, as illustrated in FIG. 40, a mounting plate (76) may be installed within the electric control box (7). The mounting plate (76) is installed within the mounting cavity (721) so that the mounting cavity (721) forms a first chamber (7212) and a second chamber (7214) located on both sides of the mounting plate (76). A first ventilation port (764) and a second ventilation port (766) are spaced apart and opened on the mounting plate (76). Gas in the first chamber (7212) flows into the second chamber (7214) through the first ventilation port (764), and gas in the second chamber (7214) flows into the first chamber (7212) through the second ventilation port (766). At least a portion of the heat exchange body (61) is located within the first chamber (7212), and the electronic components (71) and the heat dissipation fan (78) are installed within the second chamber (7214).

[0244] By adopting a mounting plate (76), the mounting cavity (721) is divided to form two independent first chambers (7212) and second chambers (7214). This creates an airflow that circulates within the first chamber (7212) and the second chamber (7214), thereby increasing the amount of air in contact with the heat dissipation fins (65) installed within the first chamber (7212). Additionally, the airflow with reduced temperature facilitates heat dissipation for the electronic components (71) within the second chamber (7214) and prevents the mixing of gases. This can improve the heat dissipation efficiency of the heat dissipation fins (65).

[0245] Here, the heat dissipation fan (78) installed in the second chamber (7214) is used to accelerate the air flow speed within the second chamber (7214) and further accelerate the air circulation speed between the first chamber (7212) and the second chamber (7214) to improve the heat dissipation efficiency of the electric control box (7).

[0246] In addition, the direction of flow of the heat dissipation airflow when it flows through the heat dissipation fins (65) can be installed so that it is perpendicular to the direction of flow of the refrigerant flow.

[0247] As shown in FIGS. 39 and 40, when the refrigerant flow in the heat exchange body (61) follows a horizontal direction, the heat dissipation airflow can be installed to flow along a vertical direction. This prevents the heat dissipation airflow from flowing to the location of the electronic component (71).

[0248] Specifically, the first ventilation port (764) and the second ventilation port (766) can be installed vertically spaced apart on opposite sides of the heat dissipation fin (65). Here, the number and arrangement density of the first ventilation port (764) and the second ventilation port (766) can be set as needed.

[0249] Alternatively, if the refrigerant flow in the heat exchange body (61) follows a vertical direction, the heat dissipation airflow may be installed to flow along a horizontal direction. This prevents the heat dissipation airflow from flowing to the location of the electronic component (71). Alternatively, the flow direction of the heat dissipation airflow may be installed to follow two different directions perpendicular to the flow direction of the refrigerant flow. The embodiments of the present application are not specifically limited thereto.

[0250] Additionally, if a first vent (764) and a second vent (766) are installed in a vertical direction, the first vent (764) can be installed above the second vent (766). Through this, the hot air flowing into the first chamber (7212) via the second vent (766) is automatically raised to the position of the heat exchange body (61) to perform heat exchange with the heat exchange body (61).

[0251] Optionally, a cooling fan (78) is installed in a position close to the first vent (764) so ​​that cold air located above the first chamber (7212) can immediately and easily flow into the second chamber (7214). Additionally, the cooling fan (78) can accelerate the cold air to improve the heat dissipation efficiency of the electronic component (71).

[0252] 9. Internal circulation

[0253] In the usual case, to cool down the electric control box (7), a heat dissipation hole is typically opened on the box body (72) of the electric control box (7) and is connected to the mounting cavity (721). Heat exchange is performed through natural convection with external air through the heat dissipation hole, thereby cooling down the electric control box (7). However, if the method of opening the heat dissipation hole on the box body (72) is adopted, the sealing performance of the electric control box (7) is reduced, and external impurities such as moisture and dust may flow into the mounting cavity (721) through the heat dissipation hole. Furthermore, electronic components installed inside the mounting cavity (721) may be damaged.

[0254] In order to solve the above-mentioned problem, the box body (72) of the electric control box (7) can be installed in a sealed structure. Specifically, referring to FIG. 41, the electric control box (7) includes a box body (72), a mounting plate (76), a heat sink (6), an electronic component (71), and a heat dissipation fan (78).

[0255] Here, a mounting cavity (721) is installed in the box body (72). A mounting plate (76) is installed within the mounting cavity (721) so that the mounting cavity (721) forms a first chamber (7212) and a second chamber (7214) located on both sides of the mounting plate (76). A spaced-apart first vent (764) and a second vent (766) are installed on the mounting plate (76). The first vent (764) and the second vent (766) are in communication with the first chamber (7212) and the second chamber (7214). At least a portion of the radiator (6) is installed within the first chamber (7212). An electronic component (71) is installed within the second chamber (7214) and is connected to the radiator (6) for heat conduction. The heat dissipation fan (78) is used to blow air so that the gas in the first chamber (7212) flows into the second chamber (7214) through the first vent (764).

[0256] In this embodiment, at least a portion of the radiator (6) is installed in the first chamber (7212), and an electronic component (71) and a cooling fan (78) are installed in the second chamber (7214). Additionally, a first ventilation port (764) and a second ventilation port (766) are provided on the mounting plate (76) at a distance to connect the first chamber (7212) and the second chamber (7214). In this way, the electronic component (71) generates heat, causing the air temperature inside the second chamber (7214) to become relatively high. The cooling fan (78) transports the hot air to the second ventilation port (766). Because the density of the hot air is relatively low, the hot air naturally rises and comes into contact with the radiator (6) installed in the first chamber (7212). The radiator (6) is used to lower the temperature of the hot air to form cold air. Cold air is introduced into the second chamber (7214) from the first vent (764). A heat dissipation fan (78) is used to accelerate the cold air. By using the cold air, the temperature of the electronic component (71) installed in the second chamber (7214) is lowered, and the temperature of the cold air that has exchanged heat with the electronic component (71) rises. The cold air with the raised temperature continues to flow into the second vent (766) and circulate under the action of the heat dissipation fan (78). Furthermore, the temperature of the electronic component (71) installed in the electric control box (7) is lowered through an internal circulation method. Compared to lowering the temperature by opening a heat dissipation hole on the electric control box (7), the electric control box (7) in this application is a completely sealed electric control box (7), and can effectively solve problems such as waterproofing, insect resistance, dust resistance, and moisture resistance. In addition, the reliability of the electric control of the electric control box (7) can be improved.

[0257] In another embodiment, as shown in FIG. 42, the plane on which the heat dissipation fan (78) is located is perpendicular to the plane on which the mounting plate (76) is located. The leeward side of the heat dissipation fan (78) is installed to face the first ventilation opening (764).

[0258] Specifically, the cooling fan (78) may be installed on one side of the mounting plate (76) facing the second chamber (7214). The rotational axis direction of the cooling fan (78) is parallel to the plane where the mounting plate (76) is located. The leeward side of the cooling fan (78) refers to the air inlet side of the cooling fan (78). In this embodiment, the cooling fan (78) may be installed between the first ventilation port (764) and the electronic component (71). Cold air flowing into the second chamber (7214) through the first ventilation port (764) is accelerated through the cooling fan (78) and then discharged. Therefore, the flow velocity of the cold air is increased, and the heat dissipation efficiency of the electric control box (7) is improved.

[0259] In another embodiment, as shown in FIG. 43, the heat dissipation fan (78) may be installed as a centrifugal fan.

[0260] Here, the centrifugal fan is a machine that increases gas pressure and delivers gas by relying on input mechanical energy. The operating principle of the centrifugal fan is to accelerate the gas using a high-speed rotating impeller. Therefore, in this embodiment, the heat dissipation fan (78) is installed as a centrifugal fan. On the one hand, this can improve the heat dissipation efficiency of the electronic component (71) by obtaining high-speed cold air. On the other hand, the centrifugal fan can improve installation efficiency by simplifying the structure of the heat dissipation fan (78).

[0261] An air guide plate (not shown) may be spaced apart on the mounting plate (76) and an air guide channel may be formed between the air guide plates to guide the air discharged from the heat dissipation fan (78).

[0262] For example, two parallel and spaced air guide plates may be installed between distributed electronic components (71). The extension direction of the air guide plates follows the spacing direction of the electronic components (71), defining an air guide path between the two air guide plates that follows the spacing direction of the electronic components (71). Cold air discharged from the cooling fan (78) first flows to the location of some electronic components (71) to perform heat dissipation for the electronic components (71). The air that has passed through some electronic components (71) then flows further through the air guide path to the location of another electronic component (71) to be used to perform heat dissipation for another electronic component (71). In this way, heat dissipation from the electronic components (71) is made more balanced, and the temperature of some electronic components (71) can be prevented from becoming excessively high and causing damage.

[0263] Here, a radiator (6) can be installed inside an electric control box (7). That is, a heat exchanger (61) can be installed inside a first chamber (7212) and used to lower the air temperature in the first chamber (7212).

[0264] Alternatively, the radiator (6) may be installed outside the electric control box (7), and at least a portion of the radiator (6) may be extended and installed within the first chamber (7212). For example, if the radiator (6) includes a heat exchange body (61), a header tube assembly (62), and a heat dissipation fin (65), an assembly opening (not shown) communicating with the first chamber (7212) may be opened on the box body (72). In this case, the heat exchange body (61) is connected to the outer wall of the box body (72). The heat dissipation fin (65) is connected to the heat exchange body (61) and inserted into the first chamber (7212) through the assembly opening.

[0265] Here, since the fitting method of the radiator (6) and the electric control box (7) in this embodiment is the same as that of the embodiment described above, refer to the description of the embodiment described above. This is not explained repeatedly here.

[0266] As shown in FIG. 43, the electronic component (71) can be installed within the airflow range of the cooling fan (78). This makes it easy for the cooling fan (78) to act directly on the electronic component (71) and lower its temperature.

[0267] Here, the electronic component (71) may include a main heating component with a relatively large amount of heat, such as a common mode inductor (711), a reactance (712), and a capacitor (713), and a sub heating component with a relatively small amount of heat, such as a fan module (714). To improve the heat dissipation efficiency of the main heating component, the distance between the main heating component and the first vent (764) may be shorter than the distance between the sub heating component and the first vent (764). That is, the main heating component with a relatively large amount of heat may be installed in a location close to the first vent (764), and the sub heating component with a relatively small amount of heat may be installed in a location far from the first vent (764). Through this, the relatively low-temperature air flowing in through the first vent (764) acts first on the main heating component with a relatively large amount of heat, thereby improving the heat dissipation efficiency of the main heating component with a relatively large amount of heat.

[0268] Optionally, the second vent (766) may be opened at the end of the airflow of the heat dissipation fan (78) and installed in a location close to an electronic component (71) with a relatively large amount of heat. On the one hand, this expands the radiation range of the heat dissipation fan (78), thereby improving the circulation efficiency of the air within the second chamber (7214). On the other hand, the hot air that has exchanged heat with the electronic component (71) with a relatively large amount of heat may be immediately discharged from the second chamber (7214), thereby preventing the temperature of the entire second chamber (7214) from rising.

[0269] Additionally, the second vent (766) can be installed in a location close to the first vent (764). This shortens the air circulation path within the second chamber (7214), reduces air flow resistance, and improves air circulation efficiency, thereby improving the heat dissipation efficiency of the electric control box (7).

[0270] In addition, the dimensions of the first ventilation port (764) and the second ventilation port (766) can also be set according to the arrangement of the electronic components (71).

[0271] Specifically, the number of second vents (766) may be multiple. Multiple second vents (766) are each installed at different locations on the mounting plate (76). The dimensions of the second vent (766) installed at the location of the electronic component (71) with a relatively large amount of heat can be installed relatively large. The number of second vents (766) can also be installed relatively large. In addition, the distribution density of multiple second vents (766) can also be installed relatively large. The dimensions of the second vent (766) installed at the location of the electronic component (71) with a relatively small amount of heat can be installed relatively small. The number of second vents (766) can also be installed relatively small. In addition, the distribution density of multiple second vents (766) can also be installed relatively small.

[0272] In addition, the dimensions of the first ventilation opening (764) can be installed larger than the dimensions of the second ventilation opening (766) to increase the ventilation volume and improve the efficiency of the heat dissipation fan (78).

[0273] 10. Natural convection

[0274] Referring to FIGS. 44 and 45, in this embodiment, the electric control box (7) includes a box body (72), a mounting plate (76), a heat radiator (6), and a main heating component (715).

[0275] Here, a mounting cavity (721) is installed in the box body (72). A mounting plate (76) is installed within the mounting cavity (721) so that the mounting cavity (721) forms a first chamber (7212) and a second chamber (7214) located on both sides of the mounting plate (76). A first ventilation opening (764) and a second ventilation opening (766) are installed on the mounting plate (76) spaced apart along the vertical direction. A radiator (6) is installed at least partially within the first chamber (7212). A main heating component (715) is installed within the second chamber (7214). The first ventilation port (764) and the second ventilation port (766) are connected to the first chamber (7212) and the second chamber (7214), and form a heat dissipation airflow that circulates between the first chamber (7212) and the second chamber (7214) by utilizing the temperature difference between the main heating component (715) and the radiator (6).

[0276] Specifically, the main heating component (715) is installed in the second chamber (7214). The heat generated by the operation of the main heating component (715) raises the temperature inside the second chamber (7214). Because the density of the hot air is relatively low, the hot air naturally rises and flows into the first chamber (7212) through the first vent (764) at the top of the second chamber (7214). The hot air comes into contact with the radiator (6) and performs heat exchange with the radiator (6). The temperature of the hot air decreases and its density increases, and it naturally sinks to the bottom of the first chamber (7212) under the action of gravity. It also flows into the second chamber (7214) through the second vent (766) and is used to lower the temperature of the main heating component (715) installed in the second chamber (7214). The hot air that has performed heat exchange with the main heating component (715) rises further to the location of the first vent (764) to form an internal circulating airflow between the first chamber (7212) and the second chamber (7214).

[0277] In this embodiment, a first ventilation port (764) and a second ventilation port (766) are provided on a mounting plate (76) to connect the first chamber (7212) and the second chamber (7214). Additionally, the first ventilation port (764) and the second ventilation port (766) are installed in a vertical direction. Air circulates between the first chamber (7212) and the second chamber (7214) using its own gravity, and is used to lower the temperature of the electronic component (71) installed in the second chamber (7214). It can also lower the overall temperature of the electric control box (7). Compared to a method of performing airflow by adopting a cooling fan (78), the structure of the electric control box (7) in this embodiment is simpler, which can improve the assembly efficiency of the electric control box (7) and lower the production cost of the electric control box (7).

[0278] Additionally, the radiator (6) can be installed above the main heating component (715) along the direction of gravity. That is, the radiator (6) is installed in a position close to the upper part of the first chamber (7212), and the main heating component (715) is installed in a position close to the lower part of the second chamber (7214). Through this installation method, the distance between the radiator (6) and the first vent (764) can be reduced. Thus, the hot air flowing into the first chamber (7212) through the first vent (764) is quickly brought into contact with the radiator (6) to lower the temperature and cause it to naturally sink under the action of gravity. By shortening the distance between the main heating component (715) and the second vent (766), the hot air flowing into the second chamber (7214) through the second vent (766) is quickly brought into contact with the main heating component (715) to raise the temperature and cause it to naturally rise under the action of buoyancy. In this way, the circulation speed of the airflow within the electric control box (7) can be increased and the heat dissipation efficiency improved.

[0279] Additionally, as illustrated in FIG. 45, a sub-heating component (716) may be further installed within the electric control box (7). The sub-heating component (716) is installed within the second chamber (7214) and is connected to the heat exchange body (61) to conduct heat. Here, the amount of heat generated by the sub-heating component (716) is smaller than the amount of heat generated by the main heating component (715).

[0280] Specifically, in this embodiment, a main heating component (715) with a relatively large amount of heat can be installed in a location close to the second vent (766). By doing so, on one hand, the cold air flowing in through the first chamber (7212) can first come into contact with the electronic component (71) with a relatively large amount of heat, thereby improving the heat dissipation efficiency of the electronic component (71). On the other hand, by creating a relatively large temperature difference between the cold air and the electronic component (71) with a relatively large amount of heat, the cold air can be rapidly heated and further rapidly raised under the action of buoyancy. A sub-heating component (716) with a relatively small amount of heat is installed on the heat exchange body (61) and comes into contact with the heat exchange body (61). The temperature of the electronic component (71) with a relatively small amount of heat can be directly lowered using the heat exchange body (61). In this way, the main heating component (715) with a relatively large amount of heat and the sub-heating component (716) with a relatively small amount of heat are installed in separate areas. This allows for the reasonable distribution of electronic components (71) and the full utilization of the internal space of the electric control box (7).

[0281] Optionally, the sub-heating component (716) is connected to the heat exchange body (61) via the heat dissipation fixing plate (74) to improve the assembly efficiency of the sub-heating component (716).

[0282] Here, the method of connecting the sub-heating component (716) and the heat exchange body (61) may be the same as that of the embodiment described above, and specific details refer to the description of the embodiment described above. This is not repeated here.

[0283] Alternatively, the radiator (6) may be installed outside the electric control box (7), and at least a portion of the radiator (6) may be extended and installed inside the first chamber (7212).

[0284] Here, since the fitting method of the heat exchanger (6) and the electric control box (7) is the same as that of the embodiment described above, refer to the description of the embodiment described above.

[0285] 11. Installation of flow guide sleeves on the pipeline

[0286] As illustrated in FIGS. 46 and 47, the air conditioning system (1) of the present embodiment includes a radiator (6), a pipeline (710), and a flow guide sleeve (79).

[0287] The pipeline (710) is used to connect the radiator (6) to provide a refrigerant flow to the radiator (6) or to collect a refrigerant flow out of the radiator (6). Specifically, the pipeline (710) connects the header pipe assembly of the radiator (6).

[0288] Here, the pipeline (710) may include an input pipeline and an output pipeline. The input pipeline is used to provide a refrigerant flow to the radiator (6), and the output pipeline is used to collect the refrigerant flow within the radiator (6).

[0289] A flow guide sleeve (79) is installed to cover the pipeline (710). It is used to guide the flow of condensate formed on the pipeline (710) or condensate flowing through the pipeline. The flow guide sleeve (79) can guide the flow of condensate on the pipeline (710). It also serves to protect the pipeline (710) and improves the reliability of the air conditioning system (1).

[0290] Specifically, as illustrated in FIG. 48, the flow guide sleeve (79) includes a sleeve body (791) and a flange (792).

[0291] An insertion mounting hole (793) and a drainage groove (708) are installed on the sleeve body (791). The insertion mounting hole (793) is used to accommodate a pipeline (710). The number and dimensions of the insertion mounting holes (793) can be installed according to the distribution and dimensions of the pipeline (710). For example, in the embodiment shown in FIG. 46, the number of insertion mounting holes (793) may be two. In other embodiments, the number of insertion mounting holes (793) may be one or three, etc.

[0292] A flexible material such as thermoplastic polyurethane elastomer rubber may be used for the sleeve body (791) to protect the pipeline (710) and prevent the pipeline (710) from coming into contact with the electric control box sheet metal and being damaged when vibrating.

[0293] A flange (792) is installed on the cross-section of the sleeve body (791) and is located on the outer circumference of the insertion mounting hole (793). Furthermore, it is fitted with the sleeve body (791) to form a water collection groove (794). The water collection groove (794) is used to collect condensate on the pipeline (710). A drainage groove (708) is connected to the water collection groove (794) and is used to discharge the condensate within the water collection groove (794). When the air conditioning system is in operation, the condensate flows along the pipeline (710) into the water collection groove (794) of the flow guide sleeve (79), and then is discharged through the drainage groove (708) on the sleeve body (791).

[0294] As shown in FIG. 48, the outer wall of the flange (792) is aligned with the outer wall of the sleeve body (791), thereby increasing the volume of the collection groove (794), which is more advantageous for collecting condensate.

[0295] The pipeline (710) may be installed along the direction of gravity. The sleeve body (791) includes an upper surface and a lower surface installed opposite each other. A flange (792) and a collection groove (794) are installed on the upper surface of the sleeve body (791). A drainage groove (708) connects the upper surface and the lower surface of the sleeve body (791). Condensate on the pipeline (710) flows into the collection groove (794) under the action of gravity, and then discharges the condensate through the drainage groove (708) which is connected to the collection groove (794). In this way, the condensate on the pipeline (710) can be automatically discharged. In another embodiment, the pipeline (710) may be installed at an angle to suit different application situations.

[0296] As illustrated in FIG. 48, the drainage groove (708) is opened on the side wall of the sleeve body (791). It is also connected to the insertion mounting hole (793) and the outer surface of the sleeve body (791), so that the pipeline (710) is inserted into the insertion mounting hole (793) through the drainage groove (708). This design facilitates the assembly of the flow guide sleeve (79) and the pipeline (710) by installing the flow guide sleeve (79) over the pipeline (710) through the drainage groove (708) on one hand. On the other hand, the structure of the flow guide sleeve (79) may be simplified by discharging the condensate within the collection groove (794) through the drainage groove (708). Here, the size of the drainage groove (708) can be selected and installed according to the amount of condensate. This is not specifically limited here.

[0297] Optionally, the flange (792) is provided with an opening on one side where the drainage groove (708) is located, so that the pipeline (710) can enter the collection groove (794) through the opening. In this way, the assembly of the flow guide sleeve (79) is facilitated.

[0298] As illustrated in FIGS. 46 and 50, the air conditioning system (1) further includes an electric control box (7). The electric control box (7) includes a box body (72). A radiator (6) is installed inside the box body (72). Optionally, a drain (725) is installed on the box body (72). A flow guide sleeve (79) is embedded in the drain (725). Condensate within the electric control box (7) is collected in a collection groove (794) within the flow guide sleeve (79) and can be discharged through a drain groove (708). In this way, not only is it advantageous for the discharge of condensate, but the reliability of the electric control box (7) can also be improved by sealing the electric control box (7) through the flow guide sleeve (79).

[0299] The sleeve body (791) and the flange (792) are in contact with the box body (72). The drainage groove (708) and the opening on the flange (792) are located on one side where the sleeve body (791) and the flange (792) are in contact with the box body (72). Thus, the box body (72) blocks the drainage groove (708) and the opening from the side of the flow guide sleeve (79). In this way, the sealing of the electric control box (7) can be improved, and the area of ​​communication between the electric control box (7) and the outside can be reduced.

[0300] In another embodiment, as illustrated in FIG. 49, the difference between this embodiment and the embodiment illustrated in FIG. 48 is as follows: that a plurality of ribs (796) may be further installed inside the insertion mounting hole (793). The plurality of ribs (796) are spaced apart and surround the pipeline (710), and abut the pipeline (710) to further form a drainage groove (709) between the ribs (796). The water collection groove (794) is connected to the drainage groove (709), and the condensate collected in the water collection groove (794) may be discharged through this drainage groove (709). In the embodiment illustrated in FIG. 49, the flow guide sleeve (79) installs the drainage groove (708) and the drainage groove (709) simultaneously. This method further aids in the discharge of condensate within the water collection groove (794) and prevents the condensate within the water collection groove (794) from overflowing out. Here, the rib (796) can connect the upper and lower surfaces of the sleeve body (791). The number of ribs (796) can be 2, 3, 4, or 5, etc. The extension direction of the rib (796) is the same as the extension direction of the pipeline (710), which is advantageous for the discharge of condensate.

[0301] The rib (796) can be formed integrally with the sleeve body (791) to facilitate processing and to make the structure of the flow guide sleeve (79) more reliable. In another embodiment, the rib (796) may be bonded to the inner surface of the insertion mounting hole (793). The number of ribs (796) can be selected and installed according to the actual amount of condensate to be discharged. The present application does not specifically limit this.

[0302] In another embodiment, it can be understood that the flow guide sleeve (79) may be installed only in the drainage groove (709) rather than the drainage groove (708). In this way, the discharge of condensate within the collection groove (794) is implemented, thereby making the structure of the flow guide sleeve (79) simpler.

[0303] As illustrated in FIG. 49, a fixing groove (797) may be installed on the sleeve body (791). The fixing groove (797) engages with the box body (72) and is used to fix the flow guide sleeve (79). Optionally, the fixing groove (797) may be installed on one side of the sleeve body (791) where the drainage groove (708) is installed, thereby facilitating the installation of the flow guide sleeve (79). By fixing the flow guide sleeve (79) through the fixing groove (797), the flow guide sleeve (79) can be prevented from sliding on the pipeline (710). At the same time, the flow guide sleeve (79) can fix the pipeline (710) and prevent the pipeline (710) from tilting under external force, thereby improving the reliability of the air conditioning system (1).

[0304] In the above-described embodiment, a flow guide sleeve (79) is installed over the pipeline (710) of the air conditioning system (1) to guide the flow of condensate on the pipeline (710) and protect the pipeline (710). Additionally, the reliability of the air conditioning system (1) can be improved by sealing the electric control box (7).

[0305] The structures of each of the above embodiments may be used in combination with one another. In addition, the method of the above-described embodiments may adopt other types of radiators (6) in addition to the radiator (6) described above. The embodiments of the present application are not specifically limited thereto.

[0306] The foregoing is merely an example of the present application and does not limit the scope of the patent of the present application. Any equivalent structure or equivalent process modification based on the contents of the specification and accompanying drawings of the present application, or any direct or indirect application in other related technical fields, is likewise included within the scope of protection of the present application.

Claims

Claim 1 In a heat exchanger, the heat exchanger comprises at least four plates, a connecting piece, a first header tube, and a second header tube, wherein the at least four plates are stacked and installed together, and a plurality of microchannels are each installed on the at least four plates, and each of the plates comprises a main body and a connecting part, one end of the connecting part is connected to the main body, and at least two insertion holes are each installed on the walls of the first header tube and the second header tube, the other end of the connecting part of two of the at least four plates is welded and fixed to the first header tube through the insertion hole of the first header tube, and the other end of the connecting part of the other two of the at least four plates is welded and fixed to the second header tube through the insertion hole of the second header tube, and the connecting part of one of the other two plates penetrates the first header tube, and the connecting part of the other of the other two plates bypasses the first header tube, and the connecting piece is between two adjacent plates A heat exchanger characterized by being installed by being sandwiched between the main body parts, with solder installed on each side of the connecting piece, and the connecting piece being welded and fixed to the main body parts of the two plates installed on each side of the connecting piece by the solder. Claim 2 A heat exchanger according to claim 1, wherein the connecting piece between the two adjacent plates is a single-layer structure, or the connecting piece between the two adjacent plates is at least two layers, and the connecting pieces of the at least two layers are welded and fixed by the solder. Claim 3 A heat exchanger according to claim 1, characterized in that the melting point of the connecting piece is higher than the melting point of the solder. Claim 4 A heat exchanger characterized in that, in paragraph 3, the connecting piece is a metal foil. Claim 5 A heat exchanger characterized in that, in paragraph 4, the connecting piece is aluminum foil or copper foil. Claim 6 A heat exchanger according to claim 1, characterized in that the thickness range of the connecting piece is 0.9 mm to 1.2 mm. Claim 7 A heat exchanger according to claim 1, characterized in that the solder on the connecting piece has a covering area for the adjacent plates on both sides that is 80% or more of the overlapping area of ​​the adjacent plates on both sides. Claim 8 A heat exchanger according to claim 1, wherein the at least four plates comprise a first plate and a second plate, a plurality of first microchannels for the flow of a first refrigerant flow are installed on the first plate, and a plurality of second microchannels for the flow of a second refrigerant flow are installed on the second plate, wherein the second refrigerant flow absorbs heat from the first refrigerant flow to supercool the first refrigerant flow, or the first refrigerant flow absorbs heat from the second refrigerant flow to supercool the second refrigerant flow. Claim 9 A heat exchanger according to claim 1, characterized in that the distance between two adjacent insertion holes is 2 mm or more. Claim 10 A method for manufacturing a heat exchanger comprises the steps of: providing at least four plates, wherein each plate comprises a main body and a connecting part, and one end of the connecting part is connected to the main body; providing a first header tube and a second header tube, wherein at least two insertion holes are each installed on the walls of the first header tube and the second header tube; providing a connecting piece having solder installed on each of its sides; stacking and installing the at least four plates and inserting the connecting piece between two adjacent plates; and heating the at least four plates and the connecting piece to weld and fix the connecting piece and the two plates installed on each of its sides by means of the solder. A method for manufacturing a heat exchanger characterized by comprising the step of welding and fixing the other end of the connecting portion of two of the at least four plates to the first header tube through the insertion hole of the first header tube, and at the same time welding and fixing the other end of the connecting portion of the other two plates among the at least four plates to the second header tube through the insertion hole of the second header tube— wherein the connecting portion of one of the other two plates penetrates the first header tube, and the connecting portion of the other plate among the other two plates bypasses the first header tube. Claim 11 An electric control box, wherein the electric control box comprises a box body and a heat exchanger according to any one of claims 1 to 9, the heat exchanger is connected to the electric control box, and the heat exchanger is used to dissipate heat from the electric control box. Claim 12 An air conditioning system comprising a compressor, an outdoor heat exchanger, an indoor heat exchanger, and a heat exchanger according to any one of claims 1 to 9, wherein the compressor provides a refrigerant flow circulating between the outdoor heat exchanger and the indoor heat exchanger through a connecting pipeline, and the heat exchanger is installed between the outdoor heat exchanger and the indoor heat exchanger and is in communication with the connecting pipeline. Claim 13 delete Claim 14 delete

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