Electrical control box, air conditioner outdoor unit and air conditioner

Abstract

In order to solve the technical problem of the short service life of electronic components, an electric control box is provided, comprising: a box; and a mounting plate provided in the box, a first fan and a plurality of electronic components are provided on a mounting side of the mounting plate, the first fan is used to form a first heat dissipation airflow flowing along a first heat dissipation path, the first heat dissipation airflow is redirected through an inner wall of the box and then forms a second heat dissipation airflow flowing along a second heat dissipation path, the plurality of electronic components are distributed in the first heat dissipation path and the second heat dissipation path, and the first heat dissipation path and the second heat dissipation path are located on the mounting side of the mounting plate. An air conditioner outdoor unit and an air conditioner are further disclosed.

Description

[Technical Field]

[0001] The present application relates to the field of air conditioning technology, and specifically to an electric control box, an air conditioner outdoor unit, and an air conditioner. [Background technology]

[0002] An air conditioner is a device that uses artificial means to adjust and control parameters such as temperature, humidity, and flow rate of the ambient air within a building or structure. Air conditioners typically have an electrical control box, which contains electronic components such as filters and reactors. However, heat generated during operation of the electronic components increases their temperature, affecting their operational stability. Summary of the Invention [Problem to be solved by the invention]

[0003] A primary object of the present application is to provide an electric control box, an air conditioner outdoor unit, and an air conditioner for improving the operational reliability of electronic components. [Means for solving the problem]

[0004] To achieve the above object, the present application discloses an electric control box, comprising a box and a mounting plate installed within the box, a first fan and a plurality of electronic components installed on the mounting side of the mounting plate, the first fan being used to form a first heat dissipation airflow flowing along a first heat dissipation path, the first heat dissipation airflow passing through the inner wall of the box and then redirecting to form a second heat dissipation airflow flowing along a second heat dissipation path, the plurality of electronic components being distributed between the first heat dissipation path and the second heat dissipation path, and the first heat dissipation path and the second heat dissipation path being located on the mounting side of the mounting plate.

[0005] The beneficial effects of the present invention are as follows: by installing a first fan, it is used to form a first heat dissipation airflow that flows along a first heat dissipation path, and the first heat dissipation airflow is redirected through the inner wall of the box and then forms a second heat dissipation airflow that flows along a second heat dissipation path; by distributing multiple electronic components between the first heat dissipation path and the second heat dissipation path, the heat generated during operation of the electronic components can be removed by the first heat dissipation airflow and the second heat dissipation airflow, so that the operating temperatures of the electronic components are within a reliable temperature range and the operation stability of the electronic components is high.

[0006] Based on the above technical solutions, the present application can be improved as follows:

[0007] Furthermore, the first heat dissipation path and the second heat dissipation path are sequentially connected end to end to form a circulating heat dissipation path.

[0008] Furthermore, the mounting plate divides the space within the box into a first chamber and a second chamber, the plurality of electronic components are provided in the first chamber, and the heat exchanger is provided in the second chamber.

[0009] Furthermore, the mounting plate is provided with a first return air vent and a second return air vent penetrating the mounting plate, and the first return air vent is located at the tip of the first heat dissipation path, and the second return air vent is located at the end of the second heat dissipation path.

[0010] Furthermore, the inlet of the first fan is connected to the first return air port, and the outlet of the first fan faces the tip of the first heat dissipation path.

[0011] Furthermore, the mounting plate is a rectangular plate, the first return air vent is located at a first corner of the rectangular plate, the second return air vent is located at a second corner of the rectangular plate, and the second corner and the first corner are located at opposite ends of the same diagonal of the rectangular plate.

[0012] Furthermore, the number of second return air vents is plural, and the plural second return air vents are distributed so as to be spaced apart along the first side of the mounting plate, and the first return air vent is provided on the second side of the mounting plate, with the first side and the second side being opposite each other.

[0013] Furthermore, the electric control box further includes a second fan, and the second fan is provided in the first heat dissipation path or the second heat dissipation path.

[0014] Furthermore, the second fan is provided at the tip of the second heat dissipation path.

[0015] Furthermore, the second fan is provided at the end of the second heat dissipation path, and the blowing directions of the first fan and the second fan do not intersect, and the second fan is used to form a third heat dissipation airflow that flows along the third heat dissipation path.

[0016] Furthermore, the electronic components provided on the mounting side of the mounting plate include a filter and a reactor, and the filter and the reactor are distributed in the first heat dissipation path.

[0017] Furthermore, the box is a sealed box.

[0018] The present application further provides an air conditioner outdoor unit including an electric control box according to any of the above technical solutions.

[0019] The present application further provides an air conditioner including an outdoor unit of an air conditioner according to any of the above technical solutions. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a structural schematic diagram showing an electric control box according to an embodiment of the present application; [Figure 2] 2 is a structural schematic diagram showing an electric control box according to an embodiment of the present application; [Figure 3] 3 is a structural schematic diagram 3 showing an electric control box according to an embodiment of the present application. [Figure 4]4 is a structural schematic diagram showing an electric control box according to an embodiment of the present application. [Figure 5] 5 is a structural schematic diagram showing an electric control box according to an embodiment of the present application. [Figure 6] 6 is a structural schematic diagram showing an electric control box according to an embodiment of the present application. [Figure 7] 1 is a structural schematic diagram showing a mounting plate according to an embodiment of the present application. [Figure 8] FIG. 2 is an exploded view of an electrical control box according to an embodiment of the present application. [Figure 9] 7 is a structural schematic diagram showing an electric control box according to an embodiment of the present application. [Figure 10] FIG. 2 is another structural schematic diagram showing an electric control box according to an embodiment of the present application. [Figure 11] FIG. 2 is another structural schematic diagram showing the electric control box according to an embodiment of the present application; [Figure 12] 1 is a structural schematic diagram showing an air duct partition plate of an electric control box according to an embodiment of the present application. [Figure 13] FIG. 13 is a partial view of position A in FIG. 12. [Figure 14] 1 is an exploded schematic view of an electric control box according to an embodiment of the present application with a box cover removed; [Figure 15] 1 is a structural schematic diagram showing an electric control module assembly of an electric control box according to an embodiment of the present application; [Figure 16] 1 is a structural schematic diagram showing a heat sink according to an embodiment of the present application. [Figure 17] 1 is a structural schematic diagram showing an outdoor unit of an air conditioner according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] In the related art, electronic components are provided inside an electric control box, and the electronic components may be, for example, filters, reactors, etc., and the electronic components generate heat during use, causing the temperature of the electronic components to rise, which in turn reduces the operational reliability of the electronic components. Therefore, it is necessary to lower the temperature of the electronic components.

[0022] In view of this, the electric control box according to the embodiment of the present application is provided with a first fan, which is used to form a first heat dissipation airflow, and after the first heat dissipation airflow passes through the obstruction effect of the box, it is redirected to form a second heat dissipation airflow, and the first heat dissipation airflow and the second heat dissipation airflow are used to remove heat from the electronic components, thereby reducing the temperature of the electronic components and improving the operational reliability of the electronic components.

[0023] The following examples, in combination with the drawings in the present application, clearly and completely explain the technical solutions in the present application, and the clear and explained examples do not represent all examples, but only some examples of the present application. Based on the examples in the present application, all other examples that can be obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0024] The electric control box according to the embodiment of the present application may be, for example, a sealed electric control box, which prevents water droplets, dust, and other foreign matter from entering the electric control box and damaging the electronic components inside the electric control box, and achieves waterproof, dustproof, and corrosion-proof effects.

[0025] 1, 2, 3 and 4, an embodiment of the present application provides an electric control box, which includes a box 100, a mounting plate 200, a first fan 300 and an electronic component 400. The mounting plate 200 and the first fan 300 are provided inside the box 100, and the box 100 is used to protect the mounting plate 200 and the first fan 300. The mounting plate 200 is used to mount the first fan 300 and the electronic component 400. The first fan 300 is used to drive airflow inside the box 100 to form a first heat-dissipating airflow.

[0026] 1, the first heat-dissipating airflow generated by the first fan 300 flows along a first heat-dissipating path a, and after the first heat-dissipating airflow flows to the inner wall of the box 100, the first heat-dissipating airflow turns to form a second heat-dissipating airflow, which flows along a second heat-dissipating path b. The angle between the first heat-dissipating path a and the second heat-dissipating path b may be any non-zero angle, such as 60° as shown in FIG.

[0027] The electronic component 400 is disposed on the mounting side of the mounting plate 200. In some embodiments, the electronic component 400 can be attached to the mounting side of the mounting plate 200 with screws, and in other embodiments, the electronic component 400 can be attached to the mounting side of the mounting plate 200 by welding.

[0028] There are multiple electronic components 400, and the multiple electronic components 400 are provided on a first heat dissipation path a and a second heat dissipation path b. The first heat dissipation airflow flowing through the first heat dissipation path a removes heat generated during operation of the electronic components 400 provided on the first heat dissipation path a, thereby lowering (lowering) the temperature of the electronic components 400 provided on the first heat dissipation path a. The second heat dissipation airflow flowing through the second heat dissipation path b removes heat generated during operation of the electronic components 400 provided on the second heat dissipation path b, thereby lowering the temperature of the electronic components 400 provided on the second heat dissipation path b.

[0029] The electric control box according to the embodiment of the present application has a first fan 300 installed therein, which is used to form a first heat dissipation airflow that flows along a first heat dissipation path a. After the first heat dissipation airflow flows to the inner wall of the box 100, the flow direction of the first heat dissipation airflow changes and turns to form a second heat dissipation airflow that flows along a second heat dissipation path b. The first heat dissipation airflow and the second heat dissipation airflow are used to remove heat generated during operation of the electronic components 400 located along the first heat dissipation path a and the second heat dissipation path b, thereby ensuring that the temperatures of the electronic components 400 are within a reliable temperature range and improving the operational reliability of the electronic components 400.

[0030] In some embodiments, the first heat dissipation path a and the second heat dissipation path b are sequentially connected end-to-end to form a circulating heat dissipation path. The circulating heat dissipation path is located within the box 100, and the end of the first heat dissipation airflow flowing through the circulating heat dissipation path is connected to the end of the second heat dissipation airflow, and the end of the first heat dissipation path a flowing through the circulating heat dissipation path is connected to the end of the second heat dissipation airflow, so that the first heat dissipation airflow and the second heat dissipation airflow form a circulating airflow, which is located within the box 100. In this case, both the first heat dissipation airflow and the second heat dissipation airflow exchange heat with the electronic component 400 and the box 100, thereby displacing heat generated during operation of the electronic component 400 to the outside of the box 100.

[0031] In some embodiments, the first heat dissipation path a and the second heat dissipation path b may not form a circulating path, and in this embodiment, the first heat dissipation airflow and the second heat dissipation airflow also do not form a circulating airflow.

[0032] Referring to Figures 4, 5 and 6, the mounting plate 200 divides the space within the box 100 into a first chamber 110 and a second chamber 120, a plurality of electronic components 400 are arranged in the first chamber 110, the first heat dissipation airflow and the second heat dissipation airflow are located in the first chamber 110, and a heat exchanger 500 is arranged in the second chamber 120.

[0033] 4 and 7 . A first return air vent 210 and a second return air vent 220 are provided on the mounting plate 200. The shape and size of the first return air vent 210 are not specifically limited, but the first return air vent 210 is a through-hole, and both ends of the first return air vent 210 are connected to the first chamber 110 and the second chamber 120. The shape and size of the second return air vent 220 are not specifically limited, but the second return air vent 220 is a through-hole, and both ends of the second return air vent 220 are connected to the first chamber 110 and the second chamber 120. The first return air vent 210 is located at the end of a first heat dissipation path a, and the second return air vent 220 is located at the end of a second heat dissipation path b.

[0034] When the first fan 300 operates, it drives the air in the second chamber 120 into the first chamber 110 through the first return air vent 210, forming a first heat dissipation airflow that flows along the first heat dissipation path a, and the first heat dissipation airflow is redirected by the inner wall of the box and then forms a second heat dissipation airflow that flows along the second heat dissipation path b, and the second heat dissipation airflow enters the first chamber 110 through the second return air vent 220, thus forming a circulating airflow inside the box 100, and the circulating airflow circulates through the first chamber 110 and the second chamber 120.

[0035] The first and second heat dissipation airflows in the first chamber 110 exchange heat with the electronic component 400 in the first chamber 110, and heat generated during operation of the electronic component 400 is displaced by the first and second heat dissipation airflows in the first chamber 110. The air in the second chamber 120 exchanges heat with the heat exchanger 500, and the heat held by the air in the second chamber 120 is displaced by the refrigerant in the heat exchanger 500, and the refrigerant flows out of the box 100. In this way, heat generated during operation of the electronic component 400 is displaced to the outside of the box 100. The heat exchanger in this application may be a microchannel heat exchanger. The microchannel heat exchanger has at least two sets of microchannels. The at least two sets of microchannels include a plurality of first microchannels for flow of a first refrigerant stream and a plurality of second microchannels for flow of a second refrigerant stream, wherein the second refrigerant stream absorbs heat from the first refrigerant stream, causing the first refrigerant stream to become subcooled, or the first refrigerant stream absorbs heat from the second refrigerant stream, causing the second refrigerant stream to become subcooled.

[0036] The microchannel heat exchanger according to the embodiment of the present application can also be used as an economizer in an air conditioner. In this way, the microchannel heat exchanger can be used to cool electronic components in an electrical control box and also as an economizer, which can avoid the need to install a separate economizer outside the electrical control box, simplifying the structure of the air conditioner and saving space and costs.

[0037] The structure of the box 100 will be described in detail below in conjunction with the drawings.

[0038] In the embodiment shown in Fig. 8, the box 100 comprises a box body 130 and a box cover 140. The box body 130 includes a bottom plate 131 and side plates 132 attached to the edges of the bottom plate 131. The bottom plate 131 and the side plates 132 together form a chamber with an opening, and the box cover 140 is covered by the box body 130 to seal the opening of the chamber. The bottom plate 131 may be a rectangular plate as shown in Fig. 8, the side plates 132 may be rectangular rings, and the box cover 140 may be a rectangular plate as shown in Fig. 8, and the box body 130 and the box cover 140 together form a rectangular case.

[0039] The structure of the mounting plate 200 will be described in detail below in combination with the drawings.

[0040] 7, the mounting plate 200 can be mounted in the box 100 by a connection method such as screws, fastening, or welding. For example, a bent plate can be mounted on the edge of the mounting plate 200 and have mounting holes formed in the bent plate, and a fixing plate can be mounted on the box 100, which can be an L-shaped plate, with one end of the fixing plate welded to the box 100 and the other end of the fixing plate having a mating hole, and the fixing hole on the bent plate can be set in correspondence with the mating hole on the fixing plate, and bolts and screws can be inserted into the mounting hole and the mating hole to fix the mounting plate 200 in the box 100.

[0041] 7, the mounting plate 200 is provided with a plurality of second return air vents 220, which are distributed and spaced apart along the first side of the mounting plate 200, and the first return air vent 210 is provided on the second side of the mounting plate 200, with the first side and the second side facing each other. For example, in the embodiment shown in FIG. 7, the first side is the upper side of the mounting plate, the second side is the lower side of the mounting plate, the first return air vent 210 is provided at one end of the first side, and the second return air vent is provided along the entire edge of the second side. This design increases the contact area between the air entering the second chamber 120 from the first chamber 110 and the heat exchanger 500, and further improves the efficiency of heat exchange between the air in the second chamber 120 and the heat exchanger 500.

[0042] In some embodiments, the mounting plate 200 is a rectangular plate, the first return air vent 210 is located at a first corner of the rectangular plate, the second return air vent 220 is located at a second corner of the rectangular plate, and the second corner and the first corner are located at opposite ends of the same diagonal of the rectangular plate, such that air in the first chamber 110 enters the second chamber 120 through the second return air vent 220, and air in the second chamber 120 enters the first chamber 110 through the first return air vent 210.

[0043] The first fan 300 will be described in detail below with reference to the drawings.

[0044] The first fan 300 on the mounting plate 200 may be any of a centrifugal fan, an axial fan, and a cross-flow fan, and in the embodiment shown in Figure 1, the first fan 300 may be an axial fan. Those skilled in the art will understand that changing the first fan 300 to a centrifugal fan or a cross-flow fan is a conventional substitution.

[0045] 4 and 7, the case of the first fan 300 is fixed to the mounting plate 200 by screwing, the inlet of the first fan 300 is connected to the first return air port 210 of the mounting plate 200, and the outlet of the first fan 300 faces the tip of the first heat dissipation path a. The first fan 300 draws air from the second chamber 120 into the first chamber 110, forming a first heat dissipation airflow within the first chamber 110.

[0046] The reactor box further includes a second fan 800, which will be described in detail below in conjunction with the drawings.

[0047] 4 and 6. The second fan 800 is mounted on the mounting plate 200 and is located within the first chamber 110. The second fan 800 is mounted on the first heat dissipation path a or the second heat dissipation path b. The second fan 800 may be a centrifugal fan, an axial fan, or a crossflow fan.

[0048] In some embodiments, the second fan 800 is provided at the end of the second heat dissipation path b, the first heat dissipation path a is along, for example, the upper long side of the box 100 shown in Fig. 1, the second heat dissipation path b is along, for example, the right short side of the box 100 shown in Fig. 1, and the end of the second heat dissipation path b is, for example, at the upper right corner of the box 100 shown in Fig. 1. In this case, the second fan 800 may be, for example, a crossflow fan.

[0049] In some other embodiments, the second fan 800 is provided at the end of the second heat dissipation path b, and the blowing directions of the first fan 300 and the second fan 800 do not intersect. The second fan 800 is used to generate a third heat dissipation airflow that flows along a third heat dissipation path c, and the second fan is, for example, a centrifugal blower. The third heat dissipation path c is, for example, along the lower long side of the box 100 shown in FIG. 2 . In this embodiment, the blowing directions of the first fan 300 and the second fan 800 do not collide, the blowing directions of the first fan 300 and the second fan 800 are opposite to each other, or they are installed diagonally on either side, for example, the first fan 300 blows to the right and the second fan 800 blows downward, or for example, the first fan 300 blows to the right and the second fan 800 blows to the left, and the outlet of the first fan 300 is offset from the outlet of the second fan 800.

[0050] The second fan 800 can adjust the air flow rate and volume in the box 100 in cooperation with the first fan 300, thus increasing the heat exchange efficiency between the air in the first chamber 110 and the electronic component 400 in the first chamber 110, allowing the heat generated during operation of the electronic component 400 to be removed in a timely manner, and improving the operational stability of the electronic component 400.

[0051] The electronic component 400 will be described below in conjunction with the drawings.

[0052] The plurality of electronic components 400 are divided into a first component group and a second component group, and the first component group and the second component group are distributed and installed along the width direction of the box 100. The first component group is installed near the top side of the box 100, and the second component group is installed near the bottom side of the box 100.

[0053] The number of electronic components 400 included in the first component group is not specifically limited and may be one, two, three, etc. For example, if the number of components in the first component group is three, the third electronic component 400 in the first component group is distributed at intervals along the first heat dissipation path a.

[0054] 9, the first component group may include a reactor 410 and a filter 420, and the number of reactors 410 may be two, and the filters 420 and reactors 410 are distributed at intervals along the flow direction of the first heat dissipation airflow, and the filters 420 are provided upstream of the reactors 410. In FIG. 9, the filters 420 and reactors 410 are distributed and installed along the longitudinal direction of the box 100 shown in FIG. 9, and the filters 420 are near the leading end of the first heat dissipation path a, and the reactors 410 are near the trailing end of the first heat dissipation path a.

[0055] The number of electronic components 400 included in the second component group is not specifically limited and may be one, two, three, etc. For example, if the number of electronic components in the second component group is four, the four electronic components 400 in the second component group are distributed at intervals along the second heat dissipation path b.

[0056] 9, the electric control box further includes an expansion board 600 and an electric control module assembly 700. The number of electric control module assemblies 700 may be two, and the expansion board 600 and the electric control module assembly 700 are located within the box 100 and the first chamber 110. The second component group includes the expansion board 600 and the electric control module assembly 700, which are circuit boards. The expansion board 600 and the electric control module assembly 700 are spaced apart along the second heat dissipation path b, and the direction of the expansion board 600 and the electric control module assembly 700 is parallel to the longitudinal direction of the box 100 shown in FIG. 9. The expansion board 600 is disposed opposite the filter 420, and the electric control module assembly 700 is disposed opposite the reactor 410. As shown in FIGS. 5 and 6, the filter 420 protrudes in the width direction of the box 100 toward the extension board 600 relative to the reactor 410.

[0057] The heat exchanger 500 will be described below in combination with the drawings.

[0058] See Figure 8. A portion of the heat exchanger 500 structure is located inside the box 100, and the portion of the heat exchanger 500 outside the box 100 is connected to a condenser outside the electrical control box. A refrigerant flows inside the heat exchanger 500, and the refrigerant circulates between the heat exchanger 500 and the condenser. The heat exchanger 500 may be provided inside the second chamber 120 and may exchange heat with the air flowing from the first chamber 110 to the second chamber 120. The air flowing from the first chamber 110 to the second chamber 120 is the air that has exchanged heat with the electronic components 400 in the first chamber 110. After the heat exchanger 500 exchanges heat with the air flowing from the first chamber 110 to the second chamber 120, the heat contained in the air flowing from the first chamber 110 to the second chamber 120 is replaced by a refrigerant in the heat exchanger 500, and the refrigerant flows into a condenser. The condenser is located outside the box 100 and exchanges heat with the air outside the box 100. In this way, the heat generated during the operation of the electronic components 400 is replaced by the refrigerant outside the box 100.

[0059] Continuing to refer to FIG. 8, the heat exchanger 500 generally includes a refrigerant heat exchange section 510 having an inlet and an outlet, and the refrigerant enters the refrigerant heat exchange section 510 through the inlet, and flows from the inside of the refrigerant heat exchange section 510 to the outside of the refrigerant heat exchange section 510 through the outlet.

[0060] The refrigerant heat exchange unit 510 is provided in the second chamber 120, the refrigerant flows inside the refrigerant heat exchange unit 510, the air flowing from the first chamber 110 into the second chamber 120 comes into contact with the refrigerant heat exchange unit 510, the refrigerant heat exchange unit 510 exchanges heat with the air in the second chamber 120, the heat held by the air in the second chamber 120 is replaced by the refrigerant inside the refrigerant heat exchange unit 510, the refrigerant holding the heat flows to the condenser outside the box 100, and the heat held by the refrigerant in the condenser is replaced by the air outside the box 100, and in this way, the heat generated during operation of the electronic component 400 is replaced by the air outside the box 100, thereby ensuring reliable operation of the electronic component 400.

[0061] 8 , the heat exchanger 500 further includes a refrigerant inlet pipe 520 and a refrigerant outlet pipe 530. A first end of the refrigerant inlet pipe 520 is connected to the inlet of the refrigerant heat exchange unit 510, a second end of the refrigerant inlet pipe 520 is located outside the box 100 and connected to the condenser, a first end of the refrigerant outlet pipe 530 is connected to the outlet of the refrigerant heat exchange unit 510, and a second end of the refrigerant outlet pipe 530 is located outside the box 100 and connected to the condenser, and thus the heat exchanger 500 is connected to the condenser outside the box 100.

[0062] The electric control box according to the embodiment of the present application can be installed in an air conditioner, for example, in an outdoor unit of an air conditioner of a central air conditioner. The condenser connected to the second end of the refrigerant discharge pipe 530 and the second end of the refrigerant inlet pipe 520 can be the condenser of the central air conditioner, thus utilizing the refrigerant during operation of the central air conditioner to realize heat exchange between the refrigerant and the air inside the electric control box, so that the refrigerant displaces the heat generated during operation of the electronic components 400 to the outside of the electric control box.

[0063] In an embodiment in which a heat exchanger 500 is provided, for example, as shown in Figures 5 and 8, a first through-hole 133 and a second through-hole 134 are provided in the box 100, a refrigerant inlet pipe 520 is inserted into the first through-hole 133, and a refrigerant outlet pipe 530 is inserted into the second through-hole 134, with a first end of the refrigerant inlet pipe 520 located inside the electric control box, a second end of the refrigerant inlet pipe 520 located outside the electric control box, a first end of the refrigerant outlet pipe 530 located inside the electric control box, and a second end of the refrigerant outlet pipe 530 located outside the electric control box.

[0064] In the embodiment in which heat exchanger 500 is provided, a first seal ring is provided between refrigerant inlet pipe 520 and box 100, and is used to seal refrigerant inlet pipe 520 against the wall of first through-hole 133. A second seal ring is provided between refrigerant outlet pipe 530 and box 100, and is used to seal refrigerant outlet pipe 530 against the wall of second through-hole 134. In this way, liquids such as rainwater outside the electric control box are prevented from entering the electric control box through first through-hole 133 and second through-hole 134, improving the safety of electronic component 400.

[0065] FIG. 10 is another structural schematic diagram showing an electric control box according to an embodiment of the present application, FIG. 11 is another structural schematic diagram 2 showing an electric control box according to an embodiment of the present application, FIG. 12 is a structural schematic diagram showing an air duct partition plate of an electric control box according to an embodiment of the present application, and FIG. 13 is a partial view of position A in FIG. 12.

[0066] 1 to 13 , in some embodiments, an electric control box according to an embodiment of the present disclosure includes a box 100, a mounting plate 200, a first fan 300, and an air duct partition plate 150. An installation space is formed within the box 100, and the installation space can be used to install the mounting plate 200, the first fan 300, and the air duct partition plate 150. The box 100 can protect the mounting plate 200, the air duct partition plate 150, and the first fan 300 installed within the installation space. The mounting plate 200 is located within the box 100, and a plurality of electronic components 400 are mounted on the mounting plate 200. The air duct partition plate 150 is located within the box 100 and fixed to the mounting plate 200. The air duct partition plate 150, the mounting plate 200, and the box 100 together form a cooling air duct 160, and at least some of the plurality of electronic components 400 are located within the cooling air duct 160. The first fan 300 is used to drive air to flow through the temperature-reducing air duct 160 to form a first heat-dissipating airflow, and the first heat-dissipating airflow exchanges heat with the electronic components 400 located in the temperature-reducing air duct 160, thereby removing heat generated during operation of the electronic components 400 in the temperature-reducing air duct 160.

[0067] In the electric control box according to the embodiment of the present application, the air duct partition plate 150, the mounting plate 200, and the box 100 surround the box to form the temperature-reducing air duct 160, and the first fan 300 drives the air to flow through the temperature-reducing air duct, forming a first heat-dissipating airflow. The first heat-dissipating airflow comes into contact with the electronic components 400 in the temperature-reducing air duct 160 to exchange heat. The first heat-dissipating airflow absorbs the heat generated during operation of the electronic components 400 in the temperature-reducing air duct 160, thereby lowering the temperature of the electronic components 400 and improving the operational reliability of the electronic components 400.

[0068] The first fan 300 is further used to form a second heat-dissipating airflow, which is located outside the cooling air duct 160, and the first heat-dissipating airflow and the second heat-dissipating airflow are sequentially connected end-to-end to form a circulating airflow, which is located inside the box 100. The second heat-dissipating airflow and the first heat-dissipating airflow are both located on both sides of the air duct partition plate 150.

[0069] The mounting plate 200 divides the chamber within the box 100 into a first chamber 110 and a second chamber 120. The first fan 300, the plurality of electronic components 400, and the air duct partition plate 150 are all located within the first chamber 110, and the heat exchanger 500 is located within the second chamber 120.

[0070] In some embodiments, the first heat dissipation airflow and the second heat dissipation airflow may both be located within the first chamber 110, and in this case, a circulating airflow may be formed within the first chamber 110.

[0071] In some other embodiments, the second heat dissipation airflow is located in the second chamber 120, the first heat dissipation airflow is located in the first chamber 110, the first end of the first heat dissipation airflow is connected to the first end of the second heat dissipation airflow, and the second end of the first heat dissipation airflow is connected to the second end of the second heat dissipation airflow.

[0072] In the above embodiment, the mounting plate 200 is provided with a first return air vent 210 and a second return air vent 220 penetrating therethrough, the first return air vent 210 is connected to the inlet of the first fan 300, the outlet of the first fan 300 is connected to the leading end of the temperature-reducing air duct 160, and the second return air vent 220 is provided at the end of the temperature-reducing air duct 160, thereby forming a second heat-dissipating airflow that connects the first return air vent 210 and the second return air vent 220 in the second chamber 120. The first return air vent 210 and the second return air vent 220 can circulate the first heat-dissipating airflow located in the first chamber 110 and the second heat-dissipating airflow located in the second chamber 120, forming a circulating airflow.

[0073] In the above embodiment, the first heat dissipation airflow absorbs the heat generated during operation of the electronic components in the first chamber 110 and enters the second chamber 120 through the second return air vent 220. The second heat dissipation airflow exchanges heat with the heat exchanger 500 located inside the second chamber 120 and enters the first chamber 110 through the first return air vent 210. The first heat dissipation airflow and the second heat dissipation airflow circulate. In this way, the heat generated during operation of the electronic components 400 is replaced by the refrigerant in the heat exchanger 500. The refrigerant in the heat exchanger 500 flows to the outside of the electrical control box and carries the heat to the outside of the electrical control box. In this way, the temperature of the electronic components 400 is reduced, thereby improving the operational reliability of the electronic components 400.

[0074] The electric control box according to the embodiment of the present application has a cross section taken along a plane perpendicular to the extension direction of the temperature dropping air duct 160, and the cross-sectional area of the temperature dropping air duct 160 can be maintained constant in the direction of air flow within the temperature dropping air duct 160. However, without being limited thereto, the cross-sectional area of the temperature dropping air duct 160 may vary in the direction of air flow within the temperature dropping air duct 160, for example, the cross-sectional area of the temperature dropping air duct 160 may gradually decrease in the direction of air flow within the temperature dropping air duct 160, or for example, the cross-sectional area of the center of the temperature dropping air duct 160 may be larger than the cross-sectional areas of both ends of the temperature dropping air duct 160.

[0075] The box 100 will be described in detail below in conjunction with the drawings.

[0076] The box 100 comprises a box body 130 and a box cover 140. The box body 130 comprises a bottom plate 131 and side plates 132 attached to the edges of the bottom plate 131. The bottom plate 131 and side plates 132 together form a chamber with an opening, and the box cover 140 is covered by the box body 130 to seal the opening of the chamber. The box 100 formed by the box body 130 and the box cover 140 is a sealed case. The bottom plate 131 may be a rectangular plate, the side plates 132 may be a rectangular ring, and the box cover 140 may be a rectangular plate, and the box body 130 and the box cover 140 together form a rectangular case.

[0077] The box 100 is provided with a first through hole 133 and a second through hole 134, and the refrigerant inlet pipe 520 described below is inserted into the first through hole 133, and the refrigerant outlet pipe 530 described below is inserted into the second through hole 134.

[0078] The structure of the mounting plate 200 will be described in detail below in combination with the drawings.

[0079] The mounting plate 200 may be rectangular in shape, and may be mounted in the box 100 by a connection method such as screws, fastening, or welding. For example, a bent plate may be mounted on the edge of the mounting plate 200, and mounting holes may be formed in the bent plate. A fixing plate may be mounted on the box 100, and the fixing plate may be an L-shaped plate, with one end welded to the box 100 and the other end formed with a mating hole, and the fixing hole on the bent plate may be set in correspondence with the mating hole on the fixing plate, and bolts and screws may be inserted into the fixing hole and the mating hole to fix the mounting plate 200 in the box 100.

[0080] The mounting plate 200 has a plurality of second return air vents 220, which are distributed and spaced apart along the first side of the mounting plate 200, and the first return air vent 210 is located on the second side of the mounting plate 200, with the first and second sides facing each other. For example, the first side is the top side of the mounting plate, the second side is the bottom side of the mounting plate, the first return air vent 210 is located at one end of the first side, and the second return air vent is located along the entire edge of the second side. This design increases the contact area between the air entering the second chamber 120 from the first chamber 110 and the heat exchanger 500, and further improves the efficiency of heat exchange between the air in the second chamber 120 and the heat exchanger 500.

[0081] The heat exchanger 500 will be described in detail below in combination with the drawings.

[0082] The heat exchanger 500 generally includes a refrigerant heat exchange section 510 having an inlet and an outlet, and the refrigerant enters the refrigerant heat exchange section 510 through the inlet, and flows from the inside of the refrigerant heat exchange section 510 to the outside of the refrigerant heat exchange section 510 through the outlet.

[0083] The heat exchanger 500 further includes a refrigerant inlet pipe 520 and a refrigerant outlet pipe 530, a first end of the refrigerant inlet pipe 520 located inside the electric control box and connected to the inlet of the refrigerant heat exchange unit 510, a first end of the refrigerant outlet pipe 530 located inside the electric control box and connected to the outlet of the refrigerant heat exchange unit 510, a second end of the refrigerant inlet pipe 520 located outside the electric control box, and the second end of the refrigerant outlet pipe 530 and the second end of the refrigerant inlet pipe 520 are both connected to the condenser, thus realizing refrigerant circulation.

[0084] The electric control box according to the embodiment of the present application can be installed in an air conditioner, for example, in the outdoor unit of a central air conditioner. The condenser connected to the second end of the refrigerant discharge pipe 530 and the second end of the refrigerant inlet pipe 520 can be the condenser of the central air conditioner. In this way, the refrigerant in the central air conditioner is used during operation to realize heat exchange between the refrigerant and the second heat-dissipating airflow inside the second chamber 120, thereby improving the operational reliability of the electronic components 400.

[0085] A first seal ring is provided between refrigerant inlet pipe 520 and box 100, and is used to seal refrigerant inlet pipe 520 against the wall of first through-hole 133. A second seal ring is provided between refrigerant outlet pipe 530 and box 100, and is used to seal refrigerant outlet pipe 530 against the wall of second through-hole 134. In this way, liquids such as rainwater outside the electrical control box are prevented from entering the interior of the electrical control box through first through-hole 133 and second through-hole 134, improving the safety of electronic component 400 when used.

[0086] In some embodiments, the mounting plate 200 is fixed to the box 100, and the heat exchanger 500 is fixed to the mounting plate 200. The mounting plate 200 can be connected to the box by at least one of screws, fastenings, and welding. For example, a bent plate can be installed on the edge of the mounting plate 200 and have mounting holes installed in the bent plate. Alternatively, a fixing plate can be installed on the box 100, and the fixing plate can be an L-shaped plate, with one end welded to the box 100 and the other end having a mating hole, and the fixing hole on the bent plate can be installed in correspondence with the mating hole on the fixing plate, and bolts and screws can be installed in the fixing hole and the mating hole to fix the mounting plate 200 in the box 100.

[0087] The heat exchanger in the present application may be a microchannel heat exchanger. The microchannel heat exchanger has at least two sets of microchannels, including a plurality of first microchannels through which a first refrigerant stream flows and a plurality of second microchannels through which a second refrigerant stream flows, such that the second refrigerant stream absorbs heat from the first refrigerant stream, causing the first refrigerant stream to become subcooled, or the first refrigerant stream absorbs heat from the second refrigerant stream, causing the second refrigerant stream to become subcooled.

[0088] The microchannel heat exchanger according to the embodiment of the present application can also be used as an economizer in an air conditioner. In this way, the microchannel heat exchanger can be used to cool electronic components in an electrical control box and also as an economizer, which can avoid the need to install a separate economizer outside the electrical control box, simplifying the structure of the air conditioner and saving space and costs.

[0089] The air duct partition plate 150 will be described in detail below in conjunction with the drawings.

[0090] The air duct partition panel 150 comprises a main panel 152 and a sub-panel 153, and the main panel 152 is connected to the sub-panel 153. In an actual product, the main panel 152 and the sub-panel 153 may be an integral structure, for example, the main panel 152 and the sub-panel 153 may be integrally formed by injection molding or by pressing.

[0091] The main plate 152 and the sub-plate 153 may be connected by a screwing method, for example, by providing a first threaded hole in the main plate 152 and a second threaded hole in the sub-plate 153, with the side of the main plate 152 facing the end face of the sub-plate 153 and the first threaded hole corresponding to the second threaded hole, and connecting the main plate 152 and the sub-plate 153 by screw fasteners provided in the first and second threaded holes. Of course, the main plate 152 and the sub-plate 153 may also be connected by at least one of fastening, welding, and screwing methods.

[0092] In some embodiments, a buckle 154 is provided on one side of the main plate 152 facing the mounting plate 200, a buckle 154 is provided on one side of the sub-plate 153 facing the mounting plate 200, and a fastening hole corresponding to the buckle 154 is provided on the mounting plate 200. The air duct partition plate 150 is attached to the mounting plate 200 by using the buckles 154 on the main plate 152 and the buckles 154 on the sub-plate 153 to fasten to the fastening hole. The structure of the buckles 154 may be the structure shown in FIG. 9, where each buckle 154 includes two cantilevers 1541 and protrusions 1542 on each cantilever 1541, and the two protrusions 1542 on the two cantilevers 1541 of each buckle 154 are located on opposite sides.

[0093] The main plate 152 and the sub-plate 153 are installed to form an angle, for example, the angle formed between the main plate 152 and the sub-plate 153 is 90°, 100°, 80°, etc.

[0094] The main plate 152 can be surrounded by the mounting plate 200, the side plate 132, and the box cover 140 to form a first air duct 161, and the sub-plate 153 can be surrounded by the mounting plate 200, the side plate 132, and the box cover 140 to form a second air duct 162. The outlet end of the first air duct 161 is connected to the inlet end of the second air duct 162, and the first air duct 161 and the second air duct 162 together constitute the above-mentioned temperature-reducing air duct 160.

[0095] The air duct partition plate 150 has a groove 151, which is positioned to avoid electronic components 400 facing the groove 151. In this way, electronic components 400 of different sizes can be installed in the temperature-reducing air duct 160, and the air can also be ensured to flow through the temperature-reducing air duct 160.

[0096] The groove 151 may be formed in the main plate 152. The main plate 152 may have an integral structure, and the groove 151 may be formed by bending the main plate 152. The main plate 152 may be formed by connecting a first end plate 1524, a first plate 1521, a second plate 1522, a third plate 1523, and a second end plate 1525, which are connected in sequence. In this case, the groove 151 may be formed by being surrounded by the first plate 1521, the second plate 1522, and the third plate 1523, and the groove opening of the groove 151 faces the inside of the cooling air duct 160.

[0097] The first end of the first plate body 1521 is connected to the first end of the second plate body 1522, the second end of the second plate body 1522 is connected to the first end of the third plate body 1523, the second end of the third plate body 1523 is connected to the first end of the second end plate 1525, the second end of the second end plate 1525 is connected to the sub-plate body 153, the first end of the first end plate 1524 is connected to the second end of the first plate body 1521, the second end of the first end plate 1524 corresponds to the inlet end of the first air duct 161, and the second end of the second end plate 1525 corresponds to the outlet end of the first air duct 161.

[0098] 3 and 5, the length of the first plate 1521 is greater than the length of the third plate 1523. With this design, the cross-sectional areas of the first air duct 161 are unequal at the positions of the first end plate 1524, the second plate 1522, and the second end plate 1525, allowing electronic components 400 of different sizes to be distributed inside the first air duct 161.

[0099] The electronic component 400 will be described in detail below in conjunction with the drawings.

[0100] In some embodiments, the plurality of electronic components 400 can all be arranged within the temperature-reducing air duct 160, and the first heat dissipation airflow flowing through the temperature-reducing air duct 160 is used to quickly remove heat generated during operation of the electronic components 400.

[0101] In some other embodiments, some of the multiple electronic components 400 are arranged inside the temperature-reducing air duct 160, and the remaining electronic components 400 are arranged outside the temperature-reducing air duct 160. Alternatively, electronic components 400 that are sensitive to temperature changes can be arranged inside the temperature-reducing air duct 160, and electronic components 400 that are not very sensitive to temperature changes can be arranged outside the temperature-reducing air duct 160. Alternatively, electronic components 400 that generate a relatively large amount of heat in their operating state and are easily affected by temperature can be arranged inside the temperature-reducing air duct 160, and electronic components 400 that generate a relatively small amount of heat in their operating state and are less affected by temperature can be arranged outside the temperature-reducing air duct 160.

[0102] The multiple electronic components 400 and the air duct partition plate 150 are located on the same side of the mounting plate 200, and some of the multiple electronic components 400 are located in the temperature-reducing air duct 160, i.e., some of the electronic components 400 are located on a first side of the air duct partition plate 150, and the remaining some of the electronic components 400 are located on a second side of the air duct partition plate 150, and the first side of the air duct partition plate 150 is, for example, the upper side as shown in Figure 3, and the second side of the air duct partition plate 150 is, for example, the lower side as shown in Figure 3, and the first side of the air duct partition plate 150 and the second side of the air duct partition plate 150 are installed on opposite sides.

[0103] The plurality of electronic components 400 may include reactors 410 and filters 420, and the number of reactors 410 may be two. The filters 420 and reactors 410 are spaced apart along the flow direction of the first heat dissipation airflow, and the reactors 410 and filters 420 are installed in the temperature-reducing air duct 160, with the filters 420 installed upstream of the reactors 410. The filters 420 and reactors 410 are installed in the first air duct 161 and are distributed along the longitudinal direction of the box 100, with the filters 420 near the inlet end of the first air duct 161 and the reactors 410 near the outlet end of the first air duct 161.

[0104] In some embodiments, the electric control box further includes an expansion board 600 and an electric control module assembly 700, both of which may be circuit boards and located within the box 100. There may be two electric control module assemblies 700, which are spaced apart along the extension direction of the air duct partition plate 150. The expansion boards 600 and the electric control module assemblies 700 are located outside the cooling air duct 160, and the extension direction of the expansion boards 600 and the electric control module assemblies 700 is parallel to the longitudinal direction of the box 100 shown in FIG. 3 , with the expansion board 600 facing the filter 420 and the electric control module assembly 700 facing the reactor 410.

[0105] In the width direction of the box 100, the filter 420 protrudes toward the expansion board 600 relative to the reactor 410, and the electrical control module assembly 700 protrudes toward the reactor 410 relative to the expansion board 600, and at this time, the first plate 1521, the second plate 1522, and the third plate 1523 are arranged to surround one end of the filter 420 close to the expansion board 600.

[0106] The first fan 300 will be described in detail below with reference to the drawings.

[0107] The first fan 300 may be a centrifugal fan, an axial fan, or a cross-flow fan. In the embodiment shown in FIG. 1, the first fan 300 may be an axial fan. Those skilled in the art will understand that changing the first fan 300 to a centrifugal fan or a cross-flow fan is a conventional replacement. The first fan 300 may be attached to the mounting plate 200 by at least one of screwing, welding, and fastening.

[0108] The first fan 300 is fixed to the mounting plate 200 by screwing, and the inlet of the first fan 300 is connected to the first return air port 210 of the mounting plate 200. The first fan 300 is installed at the air inlet end of the first air duct 161 and draws air from the second chamber 120 into the first chamber 110, forming a first heat-dissipating airflow within the first chamber 110. The outlet of the first fan 300 is connected to the air inlet end of the temperature-reducing air duct 160.

[0109] The reactor box further includes a second fan 800, which will be described in detail below in conjunction with the drawings.

[0110] The second fan 800 is mounted on the mounting plate 200 and is located within the first chamber 110, and the second fan 800 may be a centrifugal fan, an axial fan, or a cross-flow fan.

[0111] In some embodiments, the second fan 800 is installed in the cooling air duct 160, and the blowing direction of the second fan 800 is the same as the direction of the first heat dissipation airflow, and the blowing direction of the first fan 300 is from left to right, and the blowing direction of the second fan 800 is from top to bottom.

[0112] The second fan 800 can adjust the air flow rate and volume in the box 100 in cooperation with the first fan 300, thus increasing the heat exchange efficiency between the air in the first chamber 110 and the electronic component 400 in the first chamber 110, allowing the heat generated during operation of the electronic component 400 to be removed in a timely manner, and improving the operational stability of the electronic component 400.

[0113] FIG. 14 is an exploded schematic view of an electric control box according to an embodiment of the present application after the box cover has been removed, FIG. 15 is a structural schematic view showing an electric control module assembly of an electric control box according to an embodiment of the present application, and FIG. 16 is a structural schematic view showing a heat sink according to an embodiment of the present application.

[0114] 1 to 16. In some embodiments, an electric control box according to the present application includes a box 100 having an enclosed storage chamber 101, a heat dissipation assembly, and an electric control module assembly 700. The box 100 is used to store the heat dissipation assembly and the electric control module assembly 700, the heat dissipation assembly performs the role of heat dissipation, and the electric control module assembly 700 is used to control the operating states of a blower and a compressor of an outdoor unit of an air conditioner.

[0115] For example, the box 100 may be a rectangular box and may include a bottom plate 131, a box cover 140, a front plate 1321, a rear plate 1322, a left plate 1323, and a right plate 1324. See FIG. 3 . The left plate 1323 and the right plate 1324 extend along the Y direction and are spaced apart along the X direction. The rear plate 1322 is located at the rear ends of the left plate 1323 and the right plate 1324, thus forming a half-shell structure with openings at the front and top ends. In some implementations, the rear plate 1322, the left plate 1323, the right plate 1324, and the bottom plate 131 may be integrally formed by a process such as plastic molding or pressing.

[0116] The front plate 1321 can be fixed to the front side of the bottom plate 131 using bolts, buckles, etc., and the front plate 1321 and the rear plate 1322 both extend along the X direction, and the front plate 1321 and the rear plate 1322 are installed with a gap between them along the Y direction.

[0117] The box cover 140 faces the bottom plate 131, and may also be fixed to the top ends of the front plate 1321, the rear plate 1322, the left plate 1323 and the right plate 1324 by bolts, buckles or the like.

[0118] It should be noted that the sealed storage chamber 101 in the box 100 not only serves to protect the electrical devices in the box 100, but also prevents external heat from affecting the heat dissipation of the electrical devices. For example, during assembly, the bottom plate 131, box cover 140, front plate 1321, rear plate 1322, left plate 1323, and right plate 1324 can be hermetically connected by installing a sealing adhesive or a sealing ring, thereby forming the sealed storage chamber 101 in the box 100. The electric control box according to the embodiment of the present application may be, for example, a sealed electric control box. This prevents water droplets, dust, and other foreign matter from entering the electric control box and damaging the electronic components in the electric control box, and provides waterproof, dustproof, and corrosion-resistant effects.

[0119] Of course, the shape of the box 100 is not limited to the rectangular shape described above, and other shapes are also possible. For example, the box 100 may be a cylindrical box or an irregular box. When assembling the electric control box inside the casing of the outdoor unit of an air conditioner, any appropriate surface can be selected and fixed. For example, the rear panel 1322 of the electric control box may be hooked onto the inside of the casing of the outdoor unit, or the bottom panel 131 may be fixed inside the casing.

[0120] The heat dissipation assembly includes a heat exchanger 500 and a heat sink 540 as components for dissipating heat from within the electric control box to the outside of the electric control box. The heat sink 540 has opposing first and second surfaces 541 and 542. The electric control module assembly 700 is attached to the first surface 541, and the first surface 541 is in contact with the electric control module assembly 700, while the heat exchanger 500 is attached to the second surface 542. The heat exchanger 500 can be welded to the heat sink. The heat exchanger 500 may be, but is not limited to, a microchannel heat exchanger. In this manner, heat from the electric control module assembly 700 can be transferred to the heat exchanger 500 via the heat sink 540.

[0121] For example, the heat sink 540 includes a main body plate 543 and bosses 544 provided on the main body plate 543, the bosses 544 are connected to the electric control module assembly 700, and the surface of the main body plate 543 opposite the bosses 544 is welded to the heat exchanger 500. The bosses 544 ensure contact and heat dissipation between the heat sink 540 and the electric control module assembly 700.

[0122] The heat exchanger 500 of this embodiment includes a refrigerant inlet pipe 520, a refrigerant outlet pipe 530, and a plurality of refrigerant heat exchange sections 510 spaced apart along the Y direction. The refrigerant heat exchange sections 510 are used for the flow of a heat exchange medium, and may be circular or rectangular. The refrigerant heat exchange sections 510 of this embodiment may be flat tubes, and their cross sections may be, for example, rectangular, circular, elliptical, or trapezoidal, but are not limited thereto. The refrigerant heat exchange sections 510 have opposing first and second surfaces, which provide a large heat exchange area and thereby improve heat exchange efficiency.

[0123] A first end of the refrigerant heat exchanger 510 is connected to a refrigerant inlet pipe 520, and a second end of the refrigerant heat exchanger 510 is connected to a refrigerant outlet pipe 530. Thus, the heat exchange medium enters the refrigerant heat exchanger 510 from the refrigerant inlet pipe 520 and is then discharged through the refrigerant outlet pipe 530.

[0124] The refrigerant inlet pipes 520 and the refrigerant outlet pipes 530 extend perpendicular to the longitudinal direction of the refrigerant heat exchange units 510 (corresponding to the Y direction in the figure), and thus can communicate with all of the refrigerant heat exchange units 510. For example, two refrigerant inlet pipes 520 and two refrigerant outlet pipes 530 are provided, and this arrangement helps to increase the flow rate of the heat exchange medium and improve the heat dissipation effect. Of course, the numbers of refrigerant inlet pipes 520 and refrigerant outlet pipes 530 are not limited to this.

[0125] In an embodiment of the present application, the heat exchanger 500 may be a microchannel heat exchanger. The microchannel heat exchanger includes at least two sets of microchannels, including a plurality of first microchannels through which a first refrigerant stream flows and a plurality of second microchannels through which a second refrigerant stream flows, such that the second refrigerant stream absorbs heat from the first refrigerant stream, causing the first refrigerant stream to become subcooled, or the first refrigerant stream absorbs heat from the second refrigerant stream, causing the second refrigerant stream to become subcooled.

[0126] The microchannel heat exchanger according to the embodiment of the present application can also be used as an economizer in an air conditioner. In this way, the microchannel heat exchanger can be used to cool electronic components in an electrical control box and also as an economizer, which can avoid the need to install a separate economizer outside the electrical control box, simplifying the structure of the air conditioner and saving space and costs.

[0127] The heat dissipation assembly of this embodiment is provided with a heat exchanger 500 through which a heat exchange medium flows, whereby the heat exchange medium exchanges heat with the air to lower the air temperature inside the box 100, and a heat sink 540 is provided and fixed in contact with the electric control module assembly 700 to dissipate heat from the electric control module assembly 700 and lower the temperature of the electric control module assembly 700.

[0128] In addition, the second surface 542 of the heat sink 540 can be welded to the heat exchanger 500, which serves to strengthen the heat exchanger 500 and prevent bending deformation of the refrigerant heat exchange unit 510 or overlapping of multiple refrigerant heat exchange units 510 after displacement, allowing the heat exchange medium in the refrigerant heat exchange unit 510 to flow smoothly and maximize the heat exchange area. When the subsequent first fan 300 drives the internal circulation of air within the box 100, the air passes through the gap between two adjacent refrigerant heat exchange units 510 and fully comes into contact with the surface of the refrigerant heat exchange unit 510 through which the heat exchange medium flows, thereby improving heat exchange efficiency and heat dissipation effect.

[0129] In this embodiment, the heat exchanger 500 and the electrical control module assembly 700 are respectively mounted on both sides of the heat sink 540, and heat is transferred to the heat exchanger 500 by the heat sink 540, and the heat is dissipated to the outside of the box 100 by the heat exchanger 500, thereby reducing the heat inside the electrical control box.

[0130] The electrical control module assembly 700 of this embodiment includes a plate 730, a blower module 710, and a compressor module 720. There is a gap between the blower module 710 and the compressor module 720, and both the blower module 710 and the compressor module 720 are mounted on the plate 730. The blower module 710 is used to control the blower of the outdoor unit of the air conditioner, and the compressor module 720 is used to control the compressor of the outdoor unit of the air conditioner, thereby generating a large amount of heat from the blower module 710 and the compressor module 720. The electrical control module assembly 700 may include electrical elements such as capacitors and resistors, which are mounted on the plate 730.

[0131] Both the blower module 710 and the compressor module 720 are in contact with and connected to the first surface 541 of the heat sink 540. The blower module 710 is fixed to the heat sink 540 by screwing, which is a simple and reliable connection method, and a thermally conductive rubber layer is provided between the blower module 710 and the heat sink 540 to improve thermal conduction efficiency. The compressor module 720 is fixed to the heat sink 540 by screwing, which is a simple and reliable connection method, and a thermally conductive rubber layer is provided between the compressor module 720 and the heat sink 540 to improve thermal conduction efficiency.

[0132] A single heat sink 540 may be installed, and the blower module 710 and the compressor module 720 may be fixed to the single heat sink 540, or multiple heat sinks 540 may be provided, and the multiple heat sinks 540 may be arranged side by side in the heat exchanger 500. In this case, the blower module 710 and the compressor module 720 may be fixed to the same heat sink 540, or may be fixed to different heat sinks 540.

[0133] The electric control box of this embodiment further includes a first fan 300 and a reactor 410. The first fan 300 is used to control the air flow, and the reactor 410 plays the role of current limiting and filtering, making the outdoor unit of the air conditioner operate more stably. The first fan 300 and the reactor 410 are both mounted in the sealed storage chamber 101. For example, the first fan 300 may be mounted on a side wall of the sealed storage chamber 101 or on a mounting structure within the sealed storage chamber 101.

[0134] The reactor 410 may be attached to a side wall of the sealed storage chamber 101 or to a mounting structure within the sealed storage chamber 101. There is a gap between the reactor 410 and the electric control module assembly 700, and the reactor 410 faces the air outlet of the first fan 300. In this way, the heat generated by the reactor 410 can be absorbed by the air under the action of the first fan 300, thereby achieving a temperature reduction.

[0135] The electric control box of this embodiment further includes a mounting plate 200, which is used to mount electrical devices, etc. The mounting plate 200 is fixed inside the box 100, for example, by screwing or fastening. The mounting plate 200 has opposing first and second mounting surfaces, with the first mounting surface facing the bottom plate 131 and the second mounting surface facing the box cover 140. The mounting plate 200 may be a rectangular plate and is installed parallel to the bottom plate 131 and the box cover 140 of the box 100. Combining FIGS. 3 and 7, the mounting plate 200 divides the sealed storage chamber 101 into a first chamber 110 and a second chamber 120, with the first mounting surface located in the first chamber 110 and the second mounting surface located in the second chamber 120.

[0136] The heat dissipation assembly is located in the first chamber 110 and can dissipate heat from the box 100. A first surface 541 of a heat dissipation plate 540 of the heat dissipation assembly is fixedly connected to the mounting plate 200, and the heat dissipation plate 540 can be attached to the first mounting surface by fastening, screwing, or other methods. For example, the heat dissipation plate 540 is connected to the mounting plate 200 by screws, which is a stable and reliable connection method. A thermally conductive rubber layer may be provided between the first surface 541 of the heat dissipation plate 540 and the first mounting surface to improve heat transfer efficiency.

[0137] The reactor 410 is located within the second chamber 120 and is fixedly connected to the side wall of the second chamber 120. For example, the reactor 410 may be attached to a side panel of the box 100 surrounding the second chamber 120, or may be attached to the mounting plate 200. The reactor 410 of this embodiment is attached to the second mounting surface and can be attached to the second mounting surface by means of fastening, screwing, etc.

[0138] When the heat sink 540 is attached to the first mounting surface and the reactor 410 is attached to the second mounting surface, the heat generated by the reactor 410 is transferred to the heat sink 540 by the mounting plate 200, and the heat can be dissipated to the outside of the box 100 by the heat exchanger 500, thereby reducing the heat inside the electrical control box.

[0139] In some implementations, the reactor 410 is mounted on the mounting plate 200 , and the reactor 410 may then be air-cooled under the action of the first fan 300 .

[0140] In some other implementations, the reactor 410 is attached to a heat sink 540, in which case the reactor 410 can not only be air-cooled under the action of the first fan 300, but also transfer its heat to the heat exchanger 500 via the heat sink 540, where it is dissipated by exchanging heat with the heat exchange medium in the heat exchanger 500.

[0141] The two heat dissipation methods are described in detail below. One is to install a fan to exchange the air in the first chamber 110 with the air in the second chamber 120, thereby performing air-cooled heat dissipation. The other is to install a mounting opening 230 in the mounting plate 200, so that the reactor 410 comes into direct contact with the heat dissipation plate 540 to dissipate heat, and also perform air-cooled heat dissipation and heat dissipation of the heat exchanger refrigerant.

[0142] In order to realize the air flow between the first chamber 110 and the second chamber 120, a part of the mounting plate 200 is configured as an air intake grid 201. For example, the front side of the mounting plate 200 is configured as the air intake grid 201, which extends along the X direction. The air from the second chamber 120 can enter the first chamber 110 from each position along the long side of the mounting plate 200 (corresponding to the X direction in the figure) to dissipate heat, thereby avoiding local air exhaust obstruction and high local heat generation.

[0143] The first fan 300 can accelerate the air flow speed in the first chamber 110 and the second chamber 120. Under the action of the first fan 300, the air in the second chamber 120 is blown onto the heat dissipation assembly of the first chamber 110 for heat exchange, and the air after heat exchange is blown back into the second chamber 120, thereby realizing air flow and heat exchange inside the box 100 and easily ensuring the cleanliness of the air inside the box 100.

[0144] A first predetermined gap between the first fan 300 and the air inlet grid 201 extends the air flow path and improves the heat dissipation effect. The air inlet of the first fan 300 extends into the first chamber 110, and the air outlet of the first fan 300 extends into the second chamber 120. Thus, under the operation of the first fan 300, the cool air in the first chamber 110 enters the first fan 300 through the air inlet and then exits into the second chamber 120 through the air outlet. The air then carries the heat in the second chamber 120 back to the first chamber 110 through the air inlet grid 201, where it exchanges heat with the heat dissipation assembly and its temperature drops. This reciprocating circulation reduces the temperature of the electrical devices in the first chamber 110.

[0145] The air inlet of the first fan 300 extends into the first chamber 110, thereby achieving communication with the first chamber 110. Of course, this is not a limitation, and for example, a through-hole may be provided in the mounting plate 200, and the air inlet of the first fan 300 may face the through-hole, thereby achieving communication with the first chamber 110. The air outlet of the first fan 300 extends into the second chamber 120, thereby achieving communication with the second chamber 120. If the first fan 300 can be mounted on the second mounting surface, the air outlet of the first fan 300 will be located within the second chamber 120.

[0146] In this embodiment, electrical devices such as the first fan 300 and reactor 410 are mounted on the second mounting surface of the mounting plate 200, which facilitates signal transmission and power supply. For example, the first fan 300 includes a housing and a fan mounted in the housing, and the housing is fixed to the second mounting surface by screwing or fastening. The housing has an air inlet and an air outlet, the air inlet faces a through-hole in the mounting plate 200 and communicates with the first chamber 110, and the air outlet is located in the second chamber 120.

[0147] In this embodiment, the air outlet of the first fan 300 and the air inlet grid 201 form an air duct, and the reactor 410 is installed in the air duct. In this way, the reactor 410 is located on one side of the air outlet of the first fan 300, and the cool air blown out from the first fan 300 quickly comes into contact with the reactor 410, removing the heat generated by the reactor 410 and improving the heat dissipation effect of the reactor 410.

[0148] In some possible implementations, the air duct partition plate 150 is attached to the mounting plate 200, and the air duct is defined by the air duct partition plate 150, the mounting plate 200, and the box 100. The air duct partition plate 150 can be fixed to the mounting plate 200 by fastening, gluing, screwing, etc.

[0149] The electrical control box of this embodiment may include a motherboard 430, a power supply board 440, a filter 420, and an expansion board 600. Data signals from each circuit and sensor are transmitted to the motherboard 430, the power supply board 440 is used to distribute power to each electrical device, the filter 420 is used to filter harmonics to ensure the stability of the operation of the electrical devices, and the expansion board 600 is used to connect equipment added by the user. Of course, the electrical devices in the electrical control box are not limited to this.

[0150] The power supply board 440, the first fan 300, the filter 420, and the reactor 410 are spaced apart along the X direction on the top end of the mounting plate 200 to form a first set of electrical devices, and the motherboard 430, the expansion board 600, and the electrical control module assembly 700 are spaced apart along the X direction on the mounting plate 200 to form a second set of electrical devices. The first set of electrical devices, the second set of electrical devices, and the air intake grid 201 are arranged side by side along the Y direction, and an air duct partition plate 150 is provided between the first set of electrical devices and the second set of electrical devices.

[0151] With this arrangement, the air discharged from the outlet of first fan 300 flows along the air duct, passes through filter 420 and reactor 410, enters air inlet grid 201, and links the air flow between air duct partition plate 150 and air inlet grid 201, before entering first chamber 110 through air inlet grid 201. With this arrangement, reactor 410, which generates a lot of heat, does not transfer heat to other electrical devices and affect them, which helps improve the heat dissipation effect.

[0152] To allow the air discharged from the first fan 300 to flow through the air intake grid 201, a gap is provided between the electric control module assembly 700 and the right side plate 1324 of the box 100, making the air duct approximately L-shaped, extending the air flow distance and improving the heat dissipation effect. Since the air speed is affected at the corners, in this embodiment, a second fan 800 is further provided in the air duct to increase the air flow speed in the air duct. The second fan 800 is fixed to the second mounting surface of the mounting plate 200 and serves to accelerate the air flow. For example, the second fan 800 is mounted between the electric control module assembly 700 and the right side plate 1324 of the box 100 to accelerate the air flow speed and improve the heat dissipation effect.

[0153] The embodiment of the present application does not limit the specific structure of the air duct partition plate 150, and it may be installed according to the size, installation layout, etc. of the electrical device.

[0154] In this embodiment, the electric control box is provided with a mounting plate 200, which separates the heat dissipation assembly and reactor 410 into the first chamber 110 and the second chamber 120. A portion of the mounting plate 200 serves as an air intake grid 201. A first fan 300 is attached to the mounting plate 200. The first fan 300 has an air intake port connected to the first chamber 110 and an air outlet connected to the second chamber 120. The first fan 300 blows cool air from the first chamber 110 into the second chamber 120, where it absorbs heat generated by the reactor 410 and other components. The air then returns to the first chamber 110 via the air intake grid 201 and exchanges heat with the heat dissipation assembly, discharging the heat from the electric control box. This reciprocating circulation achieves the purpose of lowering the temperature inside the electric control box. In addition, by controlling the air flow using the first fan 300, it is possible to remove not only the heat generated by the reactor 410 but also the heat generated by other electrical devices, which helps to improve heat dissipation efficiency.

[0155] The electric control module assembly 700 is spaced apart from the air outlet of the first fan 300, and when the air exhausted from the air outlet of the first fan 300 flows through the electric control module assembly 700, it absorbs heat generated by electrical devices such as the reactor 410. To improve the heat dissipation effect of the electric control module assembly 700, combining FIGS. 1 and 3 , this embodiment further includes at least one mounting opening 230 in the mounting plate 200, which is located between the air intake grid 201 and the first fan 300. The mounting opening 230 penetrates the mounting plate 200 in the thickness direction (corresponding to the Z direction in the figure), and the mounting opening 230 may be a circular opening, a polygonal opening, an irregular opening, or the like; this embodiment does not limit the shape of the mounting opening 230.

[0156] In this case, at least a portion of the heat sink 540 is exposed within the mounting opening 230, and the shape and size of the heat sink 540 can match the shape and size of the mounting opening 230, that is, the entire heat sink 540 is exposed within the mounting opening 230. In this embodiment, a portion of the structure of the heat sink 540 is exposed within the mounting opening 230, and another portion of the structure is attached to the first mounting surface and fixed and connected with screws.

[0157] The electric control module assembly 700 is fixedly connected to the heat sink 540 exposed within the mounting opening 230, i.e., the electric control module assembly 700 is in direct contact with the heat sink 540, and heat generated by the electric control module assembly 700 is directly transferred to the heat exchanger 500 via the heat sink 540 for heat exchange, resulting in high heat dissipation efficiency. Illustratively, the electric control module assembly 700 is fixedly connected to the heat sink 540 with screws, and a thermally conductive rubber layer is provided between the electric control module assembly 700 and the heat sink 540 to improve heat transfer efficiency.

[0158] In this embodiment, multiple electrical control module assemblies 700 are provided, and the multiple electrical control module assemblies 700 are installed at intervals along the longitudinal direction of the mounting plate 200 (corresponding to the X direction in the figure), and for example, two electrical control module assemblies 700 are installed at intervals along the longitudinal direction of the mounting plate 200 (corresponding to the X direction in the figure).

[0159] Multiple electric control module assemblies 700 share one mounting opening 230. One heat sink 540 can be installed within the mounting opening 230, i.e., all electric control module assemblies 700 are fixed to the same heat sink 540. In this case, there is a gap between two adjacent electric control module assemblies 700, and part of the heat sink 540 is exposed within the mounting opening 230, allowing air to flow through the heat sink 540, which helps improve heat dissipation efficiency.

[0160] 1 and 2, two mounting openings 230 are provided in the mounting plate 200, and each of the two electrical control module assemblies 700 corresponds to one mounting opening 230. One heat sink 540 may be provided, and a portion of the structure of the heat sink 540 is exposed in each of the two mounting openings 230. Two heat sinks 540 may be provided, and each heat sink 540 corresponds to one of the mounting openings 230.

[0161] 1 to 3 , two mounting openings 230 are arranged side by side in the X direction on the mounting plate 200, and one heat sink 540 is provided on the heat sink assembly, with a portion of the heat sink 540 exposed in each of the two mounting openings 230. Two electric control module assemblies 700 are provided, with the left electric control module assembly 700 fixedly connected to the heat sink 540 exposed in the left mounting opening 230, and the right electric control module assembly 700 fixedly connected to the heat sink 540 exposed in the right mounting opening 230. This arrangement facilitates the fixed connection between the heat sink 540 and the mounting plate 200, and also allows the portion of the mounting plate 200 between the two mounting openings 230 to provide space for wiring.

[0162] In some possible implementations, the reactor 410 dissipates heat through airflow, and the reactor 410 and the heat sink 540 are separated by the mounting plate 200. Referring to Figures 4 and 5, Figure 5 is a structural schematic diagram of an electric control box according to a second embodiment of the present invention, with the air duct partition plate and the electric control module assembly removed. The reactor 410 is screwed and fixed to the second mounting surface, and in this case, the heat generated by the reactor 410 can be transferred to the heat sink assembly by the mounting plate 200, or can be transferred to the heat sink assembly by the airflow caused by the first fan 300.

[0163] In some other possible implementations, the reactor 410 dissipates heat by directly contacting the heat dissipation assembly to transfer heat. In this case, the reactor 410 is fixedly connected to the heat sink 540 exposed in the mounting opening 230. For example, the reactor 410 is screwed or fastened to the heat sink 540, thereby contacting and conducting heat with the heat sink 540. To improve the heat transfer efficiency, a thermally conductive rubber layer is further provided between the reactor 410 and the heat sink 540 in this embodiment.

[0164] Reactor 410 of this embodiment includes reactor body 412 and fixing plate 411 connected to reactor body 412, with a portion of fixing plate 411 fixedly connected to mounting plate 200 and another portion of fixing plate 411 fixedly connected to heat sink 540. Fixing plate 411 is fixed to mounting plate 200 by screwing, fastening, etc., and fixing plate 411 is fixed to heat sink 540 by screwing, fastening, etc. Reactor 410 of this embodiment is fixedly connected to mounting plate 200 and heat sink 540 at the same time, which helps to improve the stability and reliability of the installation of reactor 410.

[0165] When the reactor 410 is fixedly connected to the heat sink 540, the fixing plate 411 of the reactor 410 partially covers the mounting opening 230, so that the other part of the heat sink 540 in the mounting opening 230 is exposed to the first chamber 110. When installed in this manner, air in the first chamber 110 can flow through the heat sink 540, which comes into contact with it and exchanges heat, helping to improve the heat dissipation effect.

[0166] The reactor 410 and the electrical control module assembly 700 share one mounting opening 230, and when installed in this manner, there is no need to process multiple mounting openings 230 in the mounting plate 200; instead, only one mounting opening 230 needs to be processed, which improves processing convenience.

[0167] The reactor 410 and the electric control module assembly 700 each correspond to one mounting opening 230, and a plurality of mounting openings 230 are provided. Since the reactor 410 and the electric control module assembly 700 each correspond to one mounting opening 230, the heat generated by the reactor 410 and the electric control module assembly 700 does not affect each other.

[0168] In this embodiment, a plurality of reactors 410 may be provided, and are installed in parallel inside the air duct along the air flow direction, and the plurality of reactors 410 are arranged side by side along the X direction on the outlet side of the first fan 300. In this embodiment, two reactors 410 are provided, and the two reactors 410 and the first fan are installed with a gap between them along the X direction.

[0169] The multiple reactors 410 share one mounting opening 230, and by arranging them in this manner, it is possible to reduce the number of openings to be machined in the mounting plate 200 and improve machining efficiency. The multiple reactors 410 each correspond to one mounting opening 230, and by arranging them in this manner, it is possible to avoid mutual influence of the multiple reactors 410 on heat dissipation.

[0170] For example, two mounting openings 230 are provided in the mounting plate 200 along the X direction, spaced apart from each other, and one heat sink 540 is provided, with a portion of the heat sink 540 exposed in the left mounting opening 230 and another portion of the heat sink 540 exposed in the right mounting opening 230. Two reactors 410 and two electric control module assemblies 700 are provided in the electric control box. The left reactor 410 and the left electric control module assembly 700 share the left mounting opening 230, and the right reactor 410 and the right electric control module assembly 700 share the right mounting opening 230.

[0171] The outdoor unit of an air conditioner according to the embodiment of the present invention includes the electric control box according to the present invention and a case 900, and the electric control box is located inside the case 900 as shown in FIG.

[0172] The air conditioner outdoor unit according to the embodiment of the present application may be an outdoor unit of a central air conditioner. The electric control box is installed inside the case of the outdoor unit of the central air conditioner. The condenser connected to the heat exchanger 500 in the electric control box may be the heat exchanger in the outdoor unit of the central air conditioner.

[0173] Two compressors and an outdoor blower are provided inside the outdoor unit of the central air conditioner, and each electric control module assembly in the electric control box is connected to a corresponding one of the compressors and used to control the corresponding one of the compressors, and each electric control module assembly in the electric control box is further connected to a corresponding one of the outdoor blowers and used to control the corresponding one of the outdoor blowers.

[0174] The air conditioner outdoor unit according to the embodiment of the present application adopts the technical solution of the electric control box described above, and therefore has at least all the beneficial effects of the technical solution of the electric control box described above, which will not be described here one by one.

[0175] An air conditioner according to an embodiment of the present application includes the air conditioner outdoor unit according to the embodiment of the present application.

[0176] The air conditioner according to the embodiment of the present application may be a central air conditioner, which includes a central air conditioner outdoor unit and a central air conditioner indoor unit. The central air conditioner outdoor unit is installed outdoors, and the central air conditioner indoor unit is installed indoors, and the central air conditioner indoor unit and the central air conditioner outdoor unit work together to realize the functions of the air conditioner, such as cooling, heating, dehumidification, etc. In the central air conditioner, the number of the central air conditioner outdoor unit is one, and the number of the central air conditioner indoor units is two or more.

[0177] An indoor heat exchanger is usually provided in the indoor unit of the central air conditioner, and an outdoor heat exchanger is usually provided in the outdoor unit of the central air conditioner, and the indoor heat exchanger and the outdoor heat exchanger are usually connected by refrigerant piping so that refrigerant can flow between the indoor heat exchanger and the outdoor heat exchanger. During cooling, the indoor heat exchanger of a central air conditioner is a vaporizer. The refrigerant in the vaporizer absorbs heat from a liquid state and turns into a gas. During this process, the vaporizer exchanges heat with the air passing through it, removing heat from the air inside the indoor unit of the central air conditioner. The air discharged from the indoor unit of the central air conditioner has cooled after radiating heat, and the indoor unit of the central air conditioner blows cool air. At the same time, the outdoor heat exchanger is a condenser. During this process, the refrigerant in the condenser changes from a gas state to a liquid state. During this process, the refrigerant condenses and radiates heat, exchanging heat with the air inside the outdoor unit of the central air conditioner that has passed through the condenser. The air inside the outdoor unit of the central air conditioner carries the heat from the condenser to the outside of the outdoor unit of the central air conditioner, thus completing the cooling process.

[0178] During the heating process of a central air conditioner, the outdoor heat exchanger is a steam generator. The refrigerant in the steam generator absorbs heat from a liquid state and turns into a gas. As the refrigerant evaporates and absorbs heat, the steam generator exchanges heat with the air flowing through it, transferring the heat stored in the air inside the outdoor unit of the central air conditioner to the refrigerant inside the steam generator. At the same time, the indoor heat exchanger is a condenser. As the refrigerant in the condenser turns from a gas state to a liquid state and condenses to release heat, the condenser exchanges heat with the air inside the indoor unit of the central air conditioner that has flowed through it. The air inside the indoor unit of the central air conditioner absorbs the heat stored in the condenser and is discharged from the indoor unit of the central air conditioner into the room outside the indoor unit of the central air conditioner, which then blows hot air into the room, thus achieving the heating process.

[0179] The electric control box is installed in the outdoor unit of the central air conditioner. The electric control box can be used to control the operation of the compressor in the outdoor unit of the central air conditioner, and the heat exchanger 500 in the electric control box can be connected to the outdoor heat exchanger.

[0180] The air conditioner according to the embodiment of the present application adopts the technical solution of the electric control box described above, and therefore has at least all the beneficial effects of the technical solution of the electric control box described above, which will not be described here one by one.

[0181] In the description of this application, terms indicating directions and positional relationships, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "top," "bottom," "front," "rear," "left," "right," "vertical," "horizontal," "upper," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," are based on the directions or positional relationships shown in the drawings and are intended merely to facilitate and simplify the description of this application, and do not indicate or imply that the referred device or element must have a specific direction, configuration, or operation in a specific direction, and cannot be considered to limit this application.

[0182] It should be noted that the terms "first" and "second" are merely for explanatory purposes and cannot be considered to indicate or imply relative importance or the number of technical features. Therefore, a feature defined as "first" or "second" can be explicitly or implicitly defined to include at least one of the feature, and in the description of this application, unless otherwise clearly and specifically limited, the concept of "plurality" is at least two, e.g., two or three.

[0183] In this application, unless otherwise clearly defined and limited, terms such as "attach," "connected to each other," "connected," and "fixed" should be understood in a broad sense, and may mean, for example, fixedly connected, detachably connected or integrally connected, mechanically connected, electrically connected or in communication with each other, directly connected to each other, connected to each other via an intermediate medium, communicating the interiors of two elements with each other, or an interactive relationship between two elements. Those skilled in the art can understand the specific concepts of the above technical terms in this application according to specific situations.

[0184] Unless otherwise specified or limited, in this application, a first feature being "above" or "below" a second feature may include direct contact between the first and second features, or may include contact between the first and second features without direct contact but via another feature between them. Furthermore, references to a first feature being "above," "above," and "on the top surface" of a second feature may include the first feature being directly above or diagonally above the second feature, or may simply indicate that the horizontal height of the first feature is higher than that of the second feature. References to a first feature being "below," "below," and "on the bottom surface" of a second feature may include the first feature being directly below or diagonally below the second feature, or may simply indicate that the horizontal height of the first feature is lower than that of the second feature.

[0185] In the description herein, references such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" mean that the specific features, structures, materials, or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In the description herein, the terms "exemplary" and "specific examples" do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, if not in conflict with each other, those skilled in the art may combine and combine features of different embodiments or examples described herein.

[0186] Although the embodiments of the present application have been presented and described, the above embodiments are illustrative and should not be construed as limiting the present application, and it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the above embodiments within the scope of the present application.

[0187] This application claims priority to a Chinese patent application submitted to the Patent Office of the People's Republic of China on August 7, 2021, bearing application number 202110904558.2 and titled "Electrical control box, air conditioner outdoor unit and air conditioner," and also claims priority to a Chinese patent application submitted to the Patent Office of the People's Republic of China on August 7, 2021, bearing application number 202121839215.4 and titled "Electrical control box, air conditioner outdoor unit and air conditioner," and also claims priority to a Chinese patent application submitted to the Patent Office of the People's Republic of China on August 7, 2021, bearing application number 202121839197.X and titled "Electrical control box, air conditioner outdoor unit and air conditioner," the entire contents of which are incorporated herein by reference.

Claims

1. an electric control box comprising: a box; and a mounting plate disposed within the box; a first fan and a plurality of electronic components disposed on a mounting side of the mounting plate; the first fan is used to form a first heat dissipation airflow flowing along a first heat dissipation path; the first heat dissipation airflow passes through an inner wall of the box and turns to form a second heat dissipation airflow flowing along a second heat dissipation path; the plurality of electronic components are distributed between the first heat dissipation path and the second heat dissipation path; and the first heat dissipation path and the second heat dissipation path are located on the mounting side of the mounting plate; the mounting plate divides a space within the box into a first chamber and a second chamber, and the plurality of electronic components are provided in the first chamber; a heat exchanger is provided in the second chamber; an electric control box, characterized in that the mounting plate is provided with a first return air vent and a second return air vent penetrating the mounting plate, the first return air vent being located at a leading end of the first heat dissipation path, and the second return air vent being located at a terminal end of the second heat dissipation path.

2. 2. The electric control box according to claim 1, wherein an inlet of the first fan is connected to the first return air vent, and an outlet of the first fan faces a tip of the first heat dissipation path.

3. 2. The electrical control box of claim 1, wherein the mounting plate is a rectangular plate, the first return air vent is located at a first corner of the rectangular plate, the second return air vent is located at a second corner of the rectangular plate, and the second corner and the first corner are located at opposite ends of the same diagonal of the rectangular plate.

4. the number of the second return air vents is plural, and the second return air vents are distributed so as to be spaced apart along the first side of the mounting plate; 2. The electric control box according to claim 1, wherein the first return air vent is provided on a second side of the mounting plate, and the first side and the second side are installed opposite each other.

5. The electric control box of claim 1, further comprising a second fan, the second fan being provided in the first heat dissipation path or the second heat dissipation path.

6. An electrical control box as described in Claim 5, characterized in that the second fan is provided at the tip of the second heat dissipation path.

7. The second fan is provided at an end of the second heat dissipation path, 6. The electric control box according to claim 5, wherein the airflow directions of the first fan and the second fan do not intersect, and the second fan is used to form a third heat dissipation airflow that flows along a third heat dissipation path.

8. An electrical control box as described in claim 1, characterized in that the box is a sealed box.

9. An electric control box comprising a box and a mounting plate provided within the box, a first fan and a plurality of electronic components provided on the mounting side of the mounting plate, the first fan being used to form a first heat dissipation airflow flowing along a first heat dissipation path, the first heat dissipation airflow being redirected through an inner wall of the box and then forming a second heat dissipation airflow flowing along a second heat dissipation path, the plurality of electronic components being distributed to the first heat dissipation path and the second heat dissipation path, and the first heat dissipation path and the second heat dissipation path being located on the mounting side of the mounting plate, The air duct partition plate is further provided within the box, the air duct partition plate is attached to the mounting plate, the air duct partition plate, the mounting plate and the box form a surrounding temperature-reducing air duct, the plurality of electronic components are provided on the mounting plate, and at least some of the plurality of electronic components are located within the temperature-reducing air duct, the first fan is disposed to drive air to flow through the temperature-reducing air duct to form the first heat-dissipating airflow; The air duct partition plate comprises a main plate and a sub-plate connected in series, the main plate and the sub-plate are installed at an angle, and the cooling air duct includes a first air duct and a second air duct; the main plate, the mounting plate and the box together form the first air duct; The electric control box is characterized in that the sub-plate, the mounting plate and the box surround each other to form the second air duct.

10. The electric control box according to claim 9, wherein the air duct partition plate has at least one groove, the groove being arranged to avoid the electronic components facing the groove.

11. The main plate is bent to form the groove; 11. The electric control box according to claim 10, wherein the main plate includes at least a first plate, a second plate, and a third plate connected in sequence, the first plate being disposed opposite the third plate, the first plate, the second plate, and the third plate surrounding each other to form the groove, and the groove opening faces the inside of the cooling air duct.

12. The electric control box according to claim 9, further comprising a second fan, the second fan being provided in the first heat dissipation path or the second heat dissipation path.

13. 13. The electric control box according to claim 12, wherein the second fan is provided at the tip of the second heat dissipation path.

14. the second fan is provided at an end of the second heat dissipation path; 13. The electric control box according to claim 12, wherein the airflow directions of the first fan and the second fan do not intersect, and the second fan is used to form a third heat dissipation airflow that flows along a third heat dissipation path.

15. An electrical control box as described in Claim 9, characterized in that the box is a sealed box.

16. An electric control box comprising a box and a mounting plate provided within the box, a first fan and a plurality of electronic components provided on the mounting side of the mounting plate, the first fan being used to form a first heat dissipation airflow flowing along a first heat dissipation path, the first heat dissipation airflow being redirected through an inner wall of the box and then forming a second heat dissipation airflow flowing along a second heat dissipation path, the plurality of electronic components being distributed to the first heat dissipation path and the second heat dissipation path, and the first heat dissipation path and the second heat dissipation path being located on the mounting side of the mounting plate, the mounting plate divides a space within the box into a first chamber and a second chamber, and the plurality of electronic components are provided in the first chamber; a heat exchanger is provided in the second chamber; the box further includes at least one electrical control module assembly, the box defining an enclosed chamber, the electrical control module assembly being disposed within the enclosed chamber; the electrical control box further comprises a heat sink, the heat sink including opposing first and second surfaces, the electrical control module assembly mounted to and contacting the first surface, and the heat exchanger mounted to the second surface; the plurality of electronic components provided on the mounting side of the mounting plate include a filter and a reactor, the filter and the reactor are distributed along the first heat dissipation path, an electric control box, characterized in that a portion of the mounting plate is configured as an air intake grid, the heat exchanger and the heat sink are mounted in the first chamber, the first fan and the reactor are mounted in the second chamber, and the airflow generated by the first fan circulates between the first chamber and the second chamber.

17. 17. The electric control box of claim 16, wherein the electric control module assembly comprises a plate, a blower module, and a compressor module, the blower module and the compressor module being both mounted on the plate and attached to and in contact with the first surface.

18. 17. The electrical control box of claim 16, wherein the filter is located upstream of the reactor.

19. the reactor is attached to the heat sink; and / or The electrical control box of claim 16, wherein the reactor is attached to the mounting plate.

20. 17. The electric control box of claim 16, wherein the mounting plate has opposing first and second mounting surfaces, the first mounting surface being located within the first chamber and connected to the first surface of the heat sink, and the second mounting surface being located within the second chamber and having the first fan and the reactor mounted thereon.

21. At least one mounting opening is provided in the mounting plate, and the mounting opening is located between the air intake grid and the first fan; At least a portion of the heat sink is exposed within the mounting opening; 17. The electric control box of claim 16, wherein when the reactor is mounted on the heat sink, both the electric control module assembly and the reactor are fixedly connected to the heat sink exposed in the mounting opening.

22. 22. The electric control box according to claim 21, wherein the reactor comprises a reactor body and a fixing plate connected to the reactor body, a portion of the fixing plate being fixedly connected to the mounting plate, and another portion of the fixing plate being fixedly connected to the heat sink.

23. the reactor is a plurality of reactors, and the plurality of reactors are arranged side by side in the sealed storage chamber along the direction of airflow, The electrical control box of claim 21, wherein the reactor is attached to the heat sink, and a plurality of the reactors share one of the mounting openings, or a plurality of the reactors each correspond to one of the mounting openings.

24. The heat sink has a rectangular shape, a plurality of the electric control module assemblies are provided, the plurality of electric control module assemblies being spaced apart along the longitudinal direction of the mounting plate; 22. The electrical control box of claim 21, wherein a plurality of the electrical control module assemblies share one of the mounting openings, or a plurality of the electrical control module assemblies each correspond to one of the mounting openings.

25. The electrical control box described in Claim 16, characterized in that the electrical control box further comprises a second fan, the second fan being provided in the first heat dissipation path or the second heat dissipation path.

26. An electrical control box as described in Claim 25, characterized in that the second fan is provided at the tip of the second heat dissipation path.

27. The second fan is provided at an end of the second heat dissipation path, 26. The electric control box of claim 25, wherein the first fan and the second fan have non-intersecting airflow directions, and the second fan is used to form a third heat dissipation airflow that flows along a third heat dissipation path.

28. 17. The electrical control box of claim 16, wherein the box is a sealed box.

29. An air conditioner outdoor unit characterized by having an electric control box described in any one of claims 1 to 28.

30. An air conditioner characterized by having an air conditioner outdoor unit as described in claim 29.

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