Electric control box and outdoor unit

Abstract

The invention provides an electric control box and an outdoor unit, and the electric control box comprises an electric control box body which is provided with a containing cavity used for containing and installing an electric control board device; the electric control box cover is connected to the electric control box body in a covering mode and can seal the containing cavity; the air inlet assembly is used for feeding fresh air into the containing cavity; and the air outlet assembly is used for discharging air in the containing cavity. According to the electric control box, the air inlet assembly and the air outlet assembly are arranged on the electric control box to form a fresh air structure of the containing cavity in the electric control box, so that air in the containing cavity is continuously replaced, the concentration of leaked refrigerants possibly existing in the electric control box is reduced in the refrigerant leakage state, electric ignition combustion or explosion is avoided, and the service life of the electric control box is prolonged. The use safety performance of the electric control box is improved, and safe and reliable use of the electric control box is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an electric control box and an outdoor unit. Background Art

[0002] Refrigerant, also known as coolant, refrigerant, or snow seed, is a medium substance used to complete energy conversion in various heat engines. Refrigerants commonly used in the current air-conditioning and refrigeration industry, such as R22, not only have a significant destructive effect on the ozone layer, but also have a significant greenhouse effect. According to the provisions of the Montreal Protocol, the use of refrigerants such as R22 that are not conducive to environmental protection will be fully restricted worldwide in 2030. However, emerging environmentally friendly refrigerants that are generally favored at present, such as R290, have the disadvantages of being flammable and explosive. When used in air conditioners, their leakage needs to be strictly controlled, which may bring dangers.

[0003] The air conditioner outdoor unit is equipped with a circuit board, and the electric control box in the air conditioner outdoor unit is the main structure to ensure the normal and reliable operation of the circuit board. When the electric control box is in use, there will be occasional electric sparks. When the flammable and explosive emerging environmentally friendly refrigerant leaks in the outdoor unit, the leakage concentration reaches a certain level, combined with the occasional electric sparks inside the electric control box, an electric ignition effect will occur, causing the product to burn or explode, bringing safety risks to the user's normal use. Summary of the invention

[0004] In view of this, the present invention aims to provide an electric control box and an outdoor unit to solve the risk of explosion when the electric control box in the prior art is used in the event of refrigerant leakage.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] An electric control box, comprising:

[0007] The electric control box body is provided with a cavity for accommodating and installing the electric control panel device;

[0008] An electric control box cover, which is connected to the electric control box body and can close the cavity;

[0009] An air inlet assembly, used for introducing fresh air into the cavity;

[0010] The air outlet component is used to discharge the air in the cavity.

[0011] Furthermore, the air inlet assembly includes a first air inlet and an air inlet pipe, the air outlet assembly includes a first air outlet and an air outlet pipe, and the plane where the first air inlet is located is arranged in a cross shape with the plane where the first air outlet is located.

[0012] Furthermore, the electric control box body includes a bottom plate and a surrounding plate, the surrounding plate is arranged on the outer contour of the bottom plate, and the first air inlet and the first air outlet are arranged on the surrounding plate.

[0013] Furthermore, the enclosure includes a first side wall, a second side wall, a third side wall and a fourth side wall, and the first side wall, the second side wall, the third side wall and the fourth side wall are connected in sequence in an enclosure shape, wherein the first side wall and the third side wall are sides with longer lengths, and the second side wall and the fourth side wall are sides with shorter lengths, and the air inlet assembly is installed on the first side wall, and the air outlet assembly is installed on the fourth side wall.

[0014] Furthermore, the air inlet pipe includes a pipe portion, an air supply channel is formed inside the pipe portion, and a first connecting portion and a second connecting portion are respectively arranged at opposite ends of the pipe portion, the first connecting portion is used for detachable connection with a back panel on the outdoor unit, and the second connecting portion is used for connection with an electric control box body, and the pipe portion is arranged in an inclined downward shape from an end close to the electric control box body to an end away from the electric control box body.

[0015] Furthermore, a water baffle device is provided inside the air supply channel, and the water baffle device is arranged at an angle with the inner wall of the tube portion. The water baffle device includes at least two water baffles, namely a first water baffle and a second water baffle. The first water baffle and the second water baffle are respectively provided at positions near both ends inside the air supply channel.

[0016] Furthermore, a second air inlet is provided on the enclosure, the second air inlet is connected to the refrigerant leakage-prone space, and the ratio of the air inlet area of ​​the second air inlet to the air inlet area of ​​the first air inlet is not greater than 0.3.

[0017] Compared with the prior art, the electric control box of the present invention has the following advantages:

[0018] The electric control box described in the present invention forms a fresh air structure for the internal cavity of the electric control box by arranging an air inlet assembly and an air outlet assembly on the electric control box, so that the air inside the cavity is continuously replaced. When the refrigerant is leaking, the concentration of the leaked refrigerant that may exist inside the electric control box is reduced to avoid electric ignition, combustion or explosion, thereby improving the safety performance of the electric control box. In addition, the operating temperature of the electric control board device is maintained within an appropriate range through cooling by fresh air, thereby ensuring stable and reliable operation of the electric control box.

[0019] Another object of the present invention is to provide an outdoor unit, comprising a chassis, a heat exchanger, a fan assembly, a compressor assembly, a back panel and an electrical control box as described above, wherein a partition is arranged on the chassis, the fan assembly and the compressor assembly are arranged on opposite sides of the partition, the electrical control box is overlapped at the upper end of the partition, the air inlet assembly is connected to the back panel, an air inlet window is arranged on the back panel at a position corresponding to the air inlet assembly, and the air outlet assembly on the electrical control box is arranged toward the fan assembly.

[0020] Furthermore, the third side wall of the electric control box includes an air inlet and an air outlet, a transition arc is provided at the connection between the air inlet and the air outlet, and the partition is fixed at the transition arc.

[0021] Furthermore, the air inlet portion is provided with a plurality of second air inlets, and the air outlet portion is provided with a plurality of second air outlets.

[0022] Compared with the prior art, the outdoor unit of the present invention has the following advantages:

[0023] The outdoor unit described in the present application utilizes the existing fan assembly to achieve the introduction or exhaust of fresh air inside the electric control box, does not require additional air inlet or outlet fans, has a compact structure, reduces component settings, reduces costs, and is reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is a structural schematic diagram of the electric control box according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the exploded structure of the electric control box according to an embodiment of the present invention;

[0027] Figure 3 It is a schematic diagram of the side structure of the electric control box body according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the initial structure of the air inlet assembly and the electric control box body according to an embodiment of the present invention;

[0029] Figure 5 This is a front view structural schematic diagram of the air inlet duct according to an embodiment of the present invention;

[0030] Figure 6 Schematic diagram of the top view of the air inlet duct according to an embodiment of the present invention;

[0031] Figure 7 for Figure 6Schematic diagram of the cross-sectional structure of the middle BB;

[0032] Figure 8 This is a schematic diagram of the structure in which the air inlet pipe and the electric control box body are assembled together according to an embodiment of the present invention;

[0033] Fig. 9 for Figure 8 Schematic diagram of the cross-sectional structure of AA;

[0034] Fig.10 This is a structural schematic diagram of an electric control box installed on an outdoor unit according to an embodiment of the present invention;

[0035] Fig.11 is a schematic diagram of a first cross-sectional structure of an outdoor unit according to an embodiment of the present invention;

[0036] Fig.12 for Fig.11 A second viewing angle structural schematic diagram of the cross-sectional structure shown in ;

[0037] Description of reference numerals:

[0038] 1-electric control box body; 101-bottom plate; 102-enclosing plate; 1021-first side wall; 1022-second side wall; 1023-third side wall; 10231-air inlet; 10232-air outlet; 1024-fourth side wall; 1025-guide flange; 10251-first guide portion; 10252-first limit portion; 10253-second guide portion; 1026-accommodating groove; 103-protruding portion; 104-second air outlet; 105-second air inlet; 106-transition arc; 2-electric control box cover; 3-air inlet assembly; 301-first air inlet ;302-air inlet pipe;3021-pipe part;3022-first connecting part;3023-second connecting part;3024-first air outlet;3025-second air outlet;3026-air supply channel;3027-first water baffle;3028-second water baffle;3029-positioning column;303-first connecting screw;4-air outlet assembly;401-first air outlet;402-air outlet pipe;403-connecting buckle;404-second connecting screw;5-electric control board device;6-third connecting screw;7-back panel;701-air inlet window;8-partition;9-chamber. DETAILED DESCRIPTION

[0039] In order to make the technical means, objectives and effects of the present invention easy to understand, the embodiments of the present invention are described in detail below with reference to specific drawings.

[0040] It should be noted that all the terms used in the present invention for directional and positional indications, such as "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "top", "low", "lateral", "longitudinal", "center", etc., are only used to explain the relative positional relationship and connection status between the components in a certain state (as shown in the accompanying drawings), and are only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features.

[0041] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0043] Example 1

[0044] like Figures 1 to 12 As shown, the present invention discloses an electric control box, comprising:

[0045] The electric control box body 1 is provided with a cavity 9 for accommodating and installing the electric control board device 5;

[0046] An electric control box cover 2, which is connected to the electric control box body 1 and can close the cavity 9;

[0047] An air inlet component 3, used for introducing fresh air into the cavity 9;

[0048] The air outlet component 4 is used to discharge the air in the cavity 9.

[0049] The electric control box disclosed in the present invention comprises an electric control box body 1, an electric control box cover 2 and an electric control board device 5, wherein the upper end surface of the electric control box body 1 is set as an open surface, the electric control box cover 2 is connected to the electric control box body 1, and a relatively closed cavity 9 is formed between the electric control box cover 2 and the electric control box body 1, and the electric control board device 5 is fixedly installed in the cavity 9, and an air inlet component 3 and an air outlet component 4 connected to the cavity 9 are arranged on the electric control box to continuously introduce fresh air into the cavity 9 of the electric control box and exhaust the internal air thereof, thereby avoiding The flammable and explosive emerging environmentally friendly refrigerant enters the electric control box and accumulates to an explosive concentration when it leaks. Even if there is a refrigerant leakage, the air in the cavity 9 of the electric control box can be continuously replaced under the action of the air inlet component 3 and the air outlet component 4 arranged on the electric control box, thereby reducing the risk of the refrigerant detonating when the electric control board device 5 emits electric sparks, thereby improving the safety of the use of the electric control box. At the same time, the fresh air structure formed by the introduced air inlet component 3 and the air outlet component 4 can also cool the electric control board device 5 in the cavity 9 to ensure the reliable operation of the electric control box.

[0050] The electric control box described in the present invention forms a fresh air structure for the internal cavity 9 of the electric control box by arranging an air inlet component 3 and an air outlet component 4 on the electric control box, so that the air inside the cavity 9 is continuously replaced. When the refrigerant is leaking, the concentration of the leaked refrigerant that may exist inside the electric control box is reduced to avoid electric ignition, combustion or explosion, thereby improving the safety performance of the electric control box and ensuring that the electric control box is safe and reliable to use.

[0051] As a preferred example of the present application, the air inlet assembly 3 includes a first air inlet 301 and an air inlet pipe 302, and the air outlet assembly 4 includes a first air outlet 401 and an air outlet pipe 402, and the plane where the first air inlet 301 is located is arranged in a cross shape with the plane where the first air outlet 401 is located. When in use, the electric control box is connected to the outside air through the air inlet pipe 302 of the air inlet assembly 3, and the outside fresh air enters the cavity 9 of the electric control box through the air inlet pipe 302 and the first air inlet 301, and then is led out of the cavity 9 through the first air outlet 401 and the air outlet pipe 402, so as to realize the continuous replacement of the air inside the cavity 9. The route of introducing fresh air into the cavity 9 and exhausting mixed air is as follows: Figure 2 The gas flow direction arrow is shown in the figure, and the air inlet pipe 302 and the air outlet pipe 402 ensure the reliability of the introduction of fresh air and the exhaust of air in the electric control box, avoiding the introduction of air with leaked refrigerant or discharging air to the space where the refrigerant leaks, and also avoiding the introduction of fresh air directly discharged through the air outlet component 4, ensuring that the introduced fresh air is fully mixed with the air inside the cavity 9 before being discharged outside the cavity 9.

[0052] This arrangement further improves the reliability of introducing fresh air and exhausting air into the electric control box, while ensuring that the introduced fresh air cools the electric control box and the electric control board device 5 inside the electric control box, thereby improving the safety of using the electric control box.

[0053] As a preferred example of the present application, the electric control box body 1 includes a bottom plate 101 and a surrounding plate 102, wherein the surrounding plate 102 is arranged on the outer contour of the bottom plate 101, and the first air inlet 301 and the first air outlet 401 are arranged on the surrounding plate 102. Preferably, the bottom plate 101 is arranged in a rectangular shape as a whole, and the plane where the first air inlet 301 is located and the plane where the first air outlet 401 is located are arranged at an angle of 90°.

[0054] This arrangement not only improves the convenience of processing and assembling the electric control box body 1, but also ensures the reliability of introducing fresh air into the cavity 9 and exhausting the air mixed with the fresh air. The structure is simple and easy to produce and assemble.

[0055] As a preferred example of the present application, the air inlet pipe 302 includes a pipe portion 3021, an air supply channel 3026 is formed inside the pipe portion 3021, and a first connection portion 3022 and a second connection portion 3023 are respectively arranged at opposite ends of the pipe portion 3021, the first connection portion 3022 is used to be detachably connected to the back plate 7 on the outdoor unit, and the second connection portion 3023 is used to be connected to the electric control box body 1. Specifically, flanges are arranged at the ends of the two ends of the pipe portion 3021 to form the first connection portion 3022 and the second connection portion 3023, a first air outlet 3024 is formed at the center of the first connection portion 3022, and the air supply channel 3026 is connected to the air outside the outdoor unit, and a second air outlet 3025 is formed at the center of the second connection portion 3023, and the air supply channel 3026 is connected to the cavity 9 of the electric control box, the first connection portion 3022 is connected to the back plate 7 by connecting screws, and the second connection portion 3023 is connected to the electric control box body 1 by connecting screws.

[0056] When in use, since the air outlet assembly 4 is connected to the space where the outdoor unit fan assembly is located, when the fan is in use, a negative pressure is generated in the space where the outdoor unit fan assembly is located, and the outdoor air enters the cavity 9 through the air inlet assembly 3 to cool the electric control board device 5, and then the mixed and cooled gas flows to the space where the outdoor unit fan assembly is located through the air outlet assembly 4, and finally discharged to the outside of the outdoor unit, to ensure the heat dissipation effect of the electric control box and its internal electric control board device 5. Since the electric control box introduces external fresh air through the air inlet assembly 3, it is connected to the external space, and the air inlet assembly 3 of the electric control box is not connected to the space where the compressor is located, it is prevented that the flammable and explosive emerging environmentally friendly refrigerant enters the electric control box when leaking and accumulates to an explosive concentration. Even if there is a refrigerant leak, under the action of the air inlet assembly 3 and the air outlet assembly 4 set on the electric control box, the air in the cavity 9 of the electric control box can be continuously replaced, reducing the risk of detonating the refrigerant when the electric control board device 5 emits an electric spark, and improving the safety of the use of the electric control box.

[0057] As a preferred example of the present application, the tube portion 3021 is arranged in an inclined downward shape from an end close to the electric control box body 1 to an end away from the electric control box body 1 .

[0058] This arrangement prevents rainwater or condensed water from being brought into the electric control box by the external air along the air inlet assembly 3, thereby ensuring the reliable use of the electrical components inside the electric control box.

[0059] As a preferred example of the present application, a water baffle device is provided inside the air supply channel 3026 .

[0060] When in use, since the air supply channel 3026 is arranged in an inclined shape as a whole with the tube 3021, and a water baffle device is formed on the inner wall of the tube 3021, it is further prevented from flowing toward the electric control box along the inner wall of the tube 3021 when rain is heavy, thereby ensuring the reliability of waterproofing of the electric control box. Preferably, the water baffle device is arranged at an angle to the inner wall of the tube 3021. As a specific example of the present application, the water baffle device is arranged perpendicular to the central axis of the tube 3021.

[0061] As a preferred example of the present application, the water baffle device includes at least two water baffles, namely a first water baffle 3027 and a second water baffle 3028. The first water baffle 3027 and the second water baffle 3028 are respectively arranged inside the air supply channel 3026 near the two ends.

[0062] This arrangement reduces the accumulation of rainwater in the air supply channel 3026 and prevents rainwater or condensed water from flowing along the inner wall of the tube 3021 into the electric control box, thereby further improving the waterproof performance of the electric control box and ensuring the safe operation of the internal components of the electric control box.

[0063] As a preferred example of the present application, a second air inlet 105 is provided on the enclosure 102, and the second air inlet 105 is connected to the space where the refrigerant is prone to leak. As an example of the present application, the space where the refrigerant is prone to leak is the space where the compressor assembly on the outdoor unit is located. Usually, in order to ensure the heat exchange efficiency of the outdoor unit heat exchanger and the reliable operation of the compressor assembly, the compressor assembly is generally arranged in a relatively closed space. However, the space is generally provided with components such as a reversing valve and a throttle valve, which makes it easy for the space to leak refrigerant. The second air inlet 105 provided on the electric control box body 1 is used to introduce the air in the space where the compressor is located into the cavity 9 of the electric control box. With the help of the fresh air structure on the electric control box, the leaked refrigerant that may exist in the space where the compressor on the outdoor unit of the air conditioner is located is discharged, thereby reducing the risk of refrigerant explosion. Preferably, the ratio of the air inlet area of ​​the second air inlet 105 to the air inlet area of ​​the first air inlet 301 is not greater than 0.3. Preferably, the ratio of the air inlet area of ​​the second air inlet 105 to the air inlet area of ​​the first air inlet 301 is in the range of 0.05 to 0.17.

[0064] As a specific example of the present application, the enclosure 102 includes a first side wall 1021, a second side wall 1022, a third side wall 1023 and a fourth side wall 1024, and the first side wall 1021, the second side wall 1022, the third side wall 1023 and the fourth side wall 1024 are connected in sequence in an enclosure shape, wherein the first side wall 1021 and the third side wall 1023 are sides with longer lengths, and the second side wall 1022 and the fourth side wall 1024 are sides with shorter lengths, the air inlet assembly 3 is installed on the first side wall 1021, and the air outlet assembly 4 is installed on the fourth side wall 1024.

[0065] As a preferred example of the present application, a guide flange 1025 is provided at the position where the first air inlet 301 is provided on the electric control box body 1, and a receiving groove 1026 is formed between the guide flange 1025 and the outer wall of the electric control box body 1, and the second connecting portion 3023 can be plugged and installed along the receiving groove 1026. Specifically, the guide flange 1025 includes a first guide portion 10251 and a second guide portion 10253, the first guide portion 10251 and the second guide portion 10253 are provided on opposite sides of the first air inlet 301, and a first limiting portion 10252 is provided above the first air inlet 301, and opposite ends of the first limiting portion 10252 are respectively connected to the first guide portion 10251 and the second guide portion 10253 as a whole. Since the tube portion 3021 of the air inlet assembly 3 is arranged in an inclined downward shape from one end close to the first air inlet 301 to the other end, the second connecting portion 3023 is located at a relatively high position on the air inlet assembly 3. By optimizing the guide flange 1025 set at the position of the first air inlet 301, an installation limiting structure with an opening at the lower end, a limit at the upper end, and guides on both sides is formed. When the air inlet assembly 3 and the electric control box body 1 are installed, the second connecting portion 3023 can be inserted from bottom to top into the receiving groove 1026 of the first guide portion 10251 and the second guide portion 10253 and slide upward until the upper end of the second connecting portion 3023 is limited by the receiving groove 1026 of the first limiting portion 10252, thereby quickly realizing the positioning and assembly of the air inlet assembly 3 and the electric control box body 1, improving the installation efficiency, and at the same time preventing condensed water outside the electric control box from entering the inside of the electric control box along the first air inlet 301, further ensuring the reliability of the use of electrical components inside the electric control box.

[0066] Preferably, a positioning column 3029 is provided on the side of the first connection part 3022 away from the second connection part 3023, and the positioning column 3029 is positioned and plugged with the back plate 7. This arrangement further improves the convenience of the air inlet assembly 3 during installation. One end of the air inlet assembly 3 is plugged into the accommodating groove 1026 through the second connection part 3023 to slide and limit. When sliding to the upper limit, the first connection part 3022 at the lower end of the air inlet assembly 3 is positioned and plugged with the back plate 7 through the positioning column 3029, and then the first connection part 3022 and the second connection part 3023 are screwed to the back plate 7 and the electric control box body 1 respectively through connecting screws. Rapid assembly can be achieved by one operator, thereby improving installation efficiency.

[0067] As a preferred example of the present application, a protrusion 103 is provided on the electric control box body 1 near the end of the air inlet assembly 3. Specifically, the protrusion 103 is provided at the connection between the first side wall 1021 and the second side wall 1022, and the air inlet assembly 3 is installed on the first side wall 1021 at one end away from the fourth side wall 1024.

[0068] This arrangement, on the one hand, facilitates foolproofing of the electric control box during assembly or assembly with other structures, and also plays a certain safety protection role for the air inlet assembly 3, ensuring the reliable use of the fresh air function of the electric control box.

[0069] As a preferred example of the present application, the air outlet duct 402 is detachably connected to the fourth side wall 1024 on the electric control box body 1, the air inlet duct 302 is detachably connected to the first side wall 1021 on the electric control box body 1, the electric control box cover 2 is detachably connected to the electric control box body 1, and the electric control box body 1 and the electric control box cover 2 are integrally formed by an aluminum casting structure. Specifically, the air inlet duct 302 and the air outlet duct 402 are integrally formed by an aluminum casting structure, the air inlet duct 302 is connected to the first side wall 1021 by a plurality of first connecting screws 303, one side of the air outlet duct 402 is connected to the first air outlet 401 on the fourth side wall 1024 by a connecting buckle 403, and the other side is connected to the fourth side wall 1024 by at least one second connecting screw 404, and the electric control box cover 2 is detachably connected to the electric control box body 1 by a third connecting screw 6.

[0070] The arrangement utilizes aluminum casting integral injection molding to ensure the structural strength of each component of the electric control box so that it meets explosion-proof requirements, while also improving the efficiency of the processing, production and assembly of the electric control box.

[0071] Example 2

[0072] like Figures 1 to 5As shown, the present invention also discloses an outdoor unit, including a chassis, a heat exchanger, a fan assembly, a compressor assembly, a back plate 7 and the electric control box described in Example 1, wherein a partition 8 is arranged on the chassis, the fan assembly and the compressor assembly are arranged on opposite sides of the partition 8, the electric control box is overlapped on the upper end of the partition 8, the air inlet assembly 3 is connected to the back plate 7, an air inlet window 701 is arranged on the back plate 7 at a position corresponding to the air inlet assembly 3, and the air outlet assembly 4 on the electric control box is arranged toward the fan assembly.

[0073] When in use, the outdoor unit of the air conditioner works, the fan of the fan assembly starts, and the space where the outdoor unit fan assembly is located is blown forward by the fan, and a negative pressure is formed in the space where the outdoor unit fan assembly is located. The external space of the outdoor unit enters the space where the fan assembly is located after heat exchange by the heat exchanger. At the same time, the air inside the cavity 9 of the electric control box flows to the space where the fan assembly is located, and the external air enters the cavity 9 through the air inlet window 701 and the air inlet assembly 3 to introduce fresh air into the electric control box. The outdoor unit described in the present application uses the original fan assembly to introduce or discharge fresh air into the electric control box, and does not need to set up an additional air inlet or air outlet fan. It has a compact structure, reduces the setting of parts, reduces costs, and is reliable to use.

[0074] As a preferred example of the present application, the third side wall 1023 on the electric control box includes an air inlet 10231 and an air outlet 10232 , a transition arc 106 is provided at the connection between the air inlet 10231 and the air outlet 10232 , and the partition 8 is fixed at the transition arc 106 .

[0075] This arrangement further improves the stability and reliability of the partition 8 supporting and limiting the electric control box.

[0076] As a preferred example of the present application, the air inlet 10231 is provided with a plurality of second air inlets 105, and the air outlet 10232 is provided with a plurality of second air outlets 104. Preferably, the second air inlet 105 is provided in a circular hole shape, and the second air outlet 104 is arranged in a grille shape with an opening facing downward. By means of the partition 8, the internal space of the outdoor unit is divided into at least a space where the fan assembly is located and a space where the compressor assembly is located. The air outlet 10232 on the electrical control box is located in the space where the fan assembly is located, and the air inlet 10231 on the electrical control box is located in the space where the compressor assembly is located. Through the multiple second air inlets 105 on the air inlet 10231, the air in the space where the compressor assembly is located can enter the electrical control box and mix with the fresh air before flowing to the space where the fan assembly is located, thereby preventing the flammable and explosive refrigerant in the space from quickly gathering to an explosive concentration when refrigerant leaks in the space where the compressor assembly is located, thereby reducing the risk of combustion and explosion of the outdoor unit. At the same time, a second air outlet 104 in the shape of a grille with an opening facing downward is provided on the air outlet 10232, thereby preventing condensed water generated by the electrical control box when in use from dripping into the interior of the electrical control box, thereby ensuring that the electrical components inside the electrical control box work reliably.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric control box, characterized in that: include: An electric control box body (1), wherein a cavity (9) is provided on the electric control box body (1) for accommodating and installing an electric control panel device (5); An electric control box cover (2), which is connected to the electric control box body (1) and is capable of closing the cavity (9); An air inlet assembly (3) for introducing fresh air into the cavity (9); The air outlet component (4) is used to discharge the air in the cavity (9).

2. The electric control box according to claim 1, characterized in that: The air inlet assembly (3) comprises a first air inlet (301) and an air inlet pipe (302), and the air outlet assembly (4) comprises a first air outlet (401) and an air outlet pipe (402), wherein the plane where the first air inlet (301) is located and the plane where the first air outlet (401) is located are arranged in a cross shape.

3. The electric control box according to claim 2, characterized in that: The electric control box body (1) comprises a base plate (101) and a surrounding plate (102); the surrounding plate (102) is arranged on the outer contour of the base plate (101); and the first air inlet (301) and the first air outlet (401) are arranged on the surrounding plate (102).

4. The electric control box according to claim 3, characterized in that: The enclosure (102) comprises a first side wall (1021), a second side wall (1022), a third side wall (1023) and a fourth side wall (1024); the first side wall (1021), the second side wall (1022), the third side wall (1023) and the fourth side wall (1024) are sequentially connected and arranged in an enclosure shape; wherein the first side wall (1021) and the third side wall (1023) are sides with longer lengths, and the second side wall (1022) and the fourth side wall (1024) are sides with shorter lengths; the air inlet assembly (3) is mounted on the first side wall (1021), and the air outlet assembly (4) is mounted on the fourth side wall (1024).

5. The electric control box according to claim 2, 3 or 4, characterized in that: The air inlet pipe (302) comprises a pipe portion (3021), an air supply channel (3026) is formed inside the pipe portion (3021), and a first connecting portion (3022) and a second connecting portion (3023) are respectively arranged at opposite ends of the pipe portion (3021), the first connecting portion (3022) being used for detachably connecting to a back panel (7) on an outdoor unit, and the second connecting portion (3023) being used for connecting to an electric control box body (1), and the pipe portion (3021) is arranged in an inclined downward shape from an end close to the electric control box body (1) to an end away from the electric control box body (1).

6. The electric control box according to claim 5, characterized in that: A water baffle device is arranged inside the air supply channel (3026), and the water baffle device is arranged at an angle to the inner wall of the tube portion (3021). The water baffle device includes at least two water baffles, namely a first water baffle (3027) and a second water baffle (3028). The first water baffle (3027) and the second water baffle (3028) are respectively arranged at positions near both ends inside the air supply channel (3026).

7. The electric control box according to claim 3 or 6, characterized in that: A second air inlet (105) is provided on the enclosure (102), and the second air inlet (105) is connected to a space where refrigerant is prone to leak, and the ratio of an air inlet area of ​​the second air inlet (105) to an air inlet area of ​​the first air inlet (301) is not greater than 0.

3.

8. An outdoor unit, characterized in that: It comprises a chassis, a heat exchanger, a fan assembly, a compressor assembly, a back plate (7) and an electric control box as claimed in any one of claims 1 to 7, wherein a partition (8) is arranged on the chassis, the fan assembly and the compressor assembly are arranged on opposite sides of the partition (8), the electric control box is overlapped on the upper end of the partition (8), the air inlet assembly (3) is connected to the back plate (7), an air inlet window (701) is arranged on the back plate (7) at a position corresponding to the air inlet assembly (3), and the air outlet assembly (4) on the electric control box is arranged toward the fan assembly.

9. The outdoor unit according to claim 8, characterized in that: The third side wall (1023) on the electric control box comprises an air inlet portion (10231) and an air outlet portion (10232), a transition arc (106) is provided at the connection between the air inlet portion (10231) and the air outlet portion (10232), and the partition plate (8) is fixed at the transition arc (106).

10. The outdoor unit according to claim 9, characterized in that: The air inlet portion (10231) is provided with a plurality of second air inlets (105), and the air outlet portion (10232) is provided with a plurality of second air outlets (104).

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