Air conditioner

Abstract

The invention discloses an air conditioner, and belongs to the technical field of air treatment. The air conditioner comprises an electrical box; the partition plate divides the space in the electrical box into a first cavity and a second cavity, and an air return port and an air outlet are formed in the partition plate; the driving plate assembly is connected with the partition plate and located in the second cavity; the refrigerant radiator is attached to the driving plate assembly and located in the first cavity, and the refrigerant radiator is located between the air return opening and the air outlet on the projection of the partition plate; the cooling fan cover is arranged on the refrigerant radiator in a covering mode, a cooling air channel is defined by the cooling fan cover and the partition plate, and the cooling air channel is communicated with the air return opening and the air outlet; and the cooling fan is arranged corresponding to the return air inlet and / or the air outlet, is located in the second cavity and is used for driving air in the second cavity to enter the cooling air duct through the return air inlet and circulate to the second cavity through the air outlet. The air conditioner can improve the heat dissipation efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of air treatment, and particularly to an air conditioner. Background Art

[0002] To meet the development trend of miniaturization and high energy efficiency of air conditioners, higher requirements are put forward for the miniaturization of the electrical box. The air conditioner electrical box needs to arrange more high-power electrical components in a relatively small space, and all electrical components need to be controlled within the working temperature range. In order to enhance the safety and reliability of the electrical system and prevent external dust and rain from entering the electrical box, it is necessary to reduce the ventilation area with the outside or even design it as a fully enclosed electrical box. How to achieve more efficient heat dissipation in a smaller sealed space is a difficult point in the design of the electrical box. Summary of the Invention

[0003] The present application provides an air conditioner that can improve the heat dissipation efficiency.

[0004] In one aspect of the present application, an air conditioner includes: an electrical box; a partition that divides the space inside the electrical box into a first chamber and a second chamber, and the partition is provided with an air return opening and an air outlet; a driving board assembly that is connected to the partition and is located in the second chamber; a refrigerant radiator that is attached to the driving board assembly and is located in the first chamber, and on the projection of the partition, the refrigerant radiator is located between the air return opening and the air outlet; a heat dissipation air hood that covers the refrigerant radiator, and the heat dissipation air hood and the partition enclose a heat dissipation air duct, and the heat dissipation air duct is respectively communicated with the air return opening and the air outlet; a heat dissipation fan that is provided corresponding to the air return opening and / or the air outlet and is located in the second chamber, and is used to drive the air in the second chamber to enter the heat dissipation air duct through the air return opening and circulate to the second chamber through the air outlet.

[0005] In some embodiments, a heating electrical component is further provided in the second chamber; the air outlet end of the heat dissipation fan faces the heating electrical component.

[0006] In some embodiments, it further includes: a fan cover that is connected to the partition corresponding to the air return opening or / and the air outlet, and an installation opening is provided on the side wall of the fan cover; the heat dissipation fan is installed at the installation opening.

[0007] In some embodiments, the axis of the heat dissipation fan is parallel to the partition.

[0008] In some embodiments, the refrigerant radiator includes: a radiator body on which a plurality of fins are provided, and a refrigerant pipeline that penetrates through the radiator body; the length extension direction of the fins is consistent with the air flow direction of the heat dissipation air duct.

[0009] In some embodiments, in the plane projection perpendicular to the length direction of the fin, the distance from the outer contour of the fin to the heat dissipation air duct cover is less than the distance between two adjacent fins.

[0010] In some embodiments, the air return opening and the air outlet are respectively located at opposite ends of the heat dissipation air duct; the heat dissipation air duct cover is provided with an arc-shaped first air guiding surface and a second air guiding surface on the wall away from the partition board, the first air guiding surface is close to the air return opening, and the second air guiding surface is close to the air outlet.

[0011] In some embodiments, it further includes: a temperature sensor, arranged at the air return opening for detecting the air temperature at the air return opening; a controller, configured to control the rotation speed of the heat dissipation fan according to the detection value of the temperature sensor so as to control the air temperature in the electrical box within a preset range.

[0012] In some embodiments, the heat dissipation air duct cover is provided with a groove, and the pipeline of the refrigerant radiator extends out of the heat dissipation air duct cover from the groove.

[0013] On the other hand of the present application, an air conditioner includes: an electrical box; a partition board, which divides the space in the electrical box into a first cavity and a second cavity; a driving board assembly, which is connected to the partition board and located in the second cavity; a refrigerant radiator, which is attached to the driving board assembly and located in the first cavity; a heat dissipation air duct cover, covering the refrigerant radiator, the heat dissipation air duct cover and the partition board enclose a heat dissipation air duct, the heat dissipation air duct is provided with an air return opening and an air outlet, and on the projection of the partition board, the air return opening and the air outlet are respectively located at two ends of the refrigerant radiator; a heat dissipation fan, arranged corresponding to the air return opening and / or the air outlet, for driving the air in the electrical box to enter the heat dissipation air duct from the air return opening, after being cooled by the refrigerant radiator, it circulates back into the electrical box from the air outlet. Description of the Drawings

[0014] Figure 1 Shows a perspective view of an electrical box in an air conditioner according to some embodiments;

[0015] Figure 2 Shows a cross-sectional view of the electrical box according to some embodiments;

[0016] Figure 3 Shows an internal structure diagram of the electrical box according to some embodiments;

[0017] Figure 4 Shows a perspective view of the electrical box with the box body omitted according to some embodiments;

[0018] Figure 5 Shows an exploded view of the electrical box with the box body omitted according to some embodiments;

[0019] Figure 6 and Figure 7 shows an internal structure diagram of an electrical box according to some embodiments;

[0020] Figure 8 shows a perspective view of a refrigerant radiator in an electrical box according to some embodiments;

[0021] Figure 9 shows a perspective view of a module radiator in an electrical box according to some embodiments.

[0022] In the above figures, 100 is the electrical box; 101 is the partition; 1011 is the avoidance portion; 1012 is the positioning rib; 1013 is the air return opening; 1014 is the air outlet; 102 is the first cavity; 103 is the second cavity; 110 is the drive board assembly; 111 is the drive board; 112 is the power module; 113 is the module radiator; 114 is the backing plate; 1141 is the exposed portion; 120 is the refrigerant radiator; 121 is the radiator body; 1211 is the fin; 122 is the refrigerant pipeline; 130 is the cooling fan; 140 is the cooling air hood; 141 is the first wall; 142 is the second wall; 143 is the third wall; 144 is the first air guiding surface; 145 is the second air guiding surface; 146 is the fourth wall; 147 is the pipe groove; 150 is the fan cover; 151 is the mounting opening; 160 is the heating electrical component. Detailed Embodiments

[0023] To make the objectives and implementation manners of this application clearer, the following will clearly and completely describe the exemplary implementation manners of this application with reference to the accompanying drawings in the exemplary embodiments of this application. Apparently, the described exemplary embodiments are only a part rather than all of the embodiments of this application.

[0024] In the description of this application, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to this application.

[0025] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0026] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0027] In this application, the air conditioner performs the refrigeration cycle by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.

[0028] The compressor compresses the refrigerant gas in a low-temperature and low-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0029] The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve the refrigeration effect by using the latent heat of evaporation of the refrigerant to perform heat exchange with the material to be cooled. During the whole cycle, the air conditioner can adjust the temperature of the indoor space.

[0030] The outdoor unit of the air conditioner refers to the part of the refrigeration cycle including the compressor and the outdoor heat exchanger. The indoor unit of the air conditioner includes the indoor heat exchanger, and the expansion valve can be provided in the indoor unit or the outdoor unit.

[0031] The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger serves as a condenser, the air conditioner serves as a heater in the heating mode. When the indoor heat exchanger serves as an evaporator, the air conditioner serves as a cooler in the cooling mode.

[0032] The air conditioner of the present application can be a split-type air conditioner with a separate outdoor unit and indoor unit, or an integrated air conditioner with the outdoor unit and indoor unit integrated into one body.

[0033] Refer to Figures 1 to 9 , the air conditioner according to an embodiment of the present application includes an electrical box 100. Electrical components are provided in the electrical box 100 for realizing the electric control function of the air conditioner.

[0034] A partition 101 is provided inside the electrical box 100. The partition 101 divides the space inside the electrical box 100 into two parts, namely the first cavity 102 and the second cavity 103. When the air conditioner is in the use scenario, the partition 101 is vertically arranged inside the electrical box 100.

[0035] The drive board assembly 110 is connected to one side of the partition 101. For example, the drive board assembly 110 can be located inside the second cavity 103. The drive board assembly 110 includes a drive board 111, a power assembly, and a backing plate 114. Among them, the power assembly includes a power module 112 and a module radiator 113.

[0036] The drive board 111 can be a PCB board. The power module 112 is connected to the drive board 111. Here, it is defined that the power module 112 is connected to the front side of the drive board 111, and other electrical components can also be connected to the back side of the drive board 111 to increase the utilization rate of the drive board 111.

[0037] An exposed portion 1141 is provided on the backing plate 114. The exposed portion 1141 can be a through groove on the backing plate 114. The module radiator 113 is connected to the backing plate 114 corresponding to the exposed portion 1141.

[0038] The power module 112 on the drive board 111 is connected to the module radiator 113 in a fitting manner, and the drive board 111 is connected to the backing plate 114 through an extended stud.

[0039] The module radiator 113 is made of a metal material, such as an aluminum block. The heat generated by the power module 112 is transferred to the module radiator 113. One end of the module radiator 113 away from the power module 112 protrudes from the exposed portion 1141 out of the backing plate 114.

[0040] The backing plate 114 is connected to the partition 101 to realize the connection of the drive board assembly 110 on the partition 101.

[0041] A relief portion 1011 is also provided on the partition 101 at the position corresponding to the exposed portion 1141. The relief portion 1011 can be an opening provided on the partition 101. The module radiator 113 is inserted into the relief portion 1011.

[0042] Positioning ribs 1012 extending towards the first cavity 102 are provided on the periphery of the relief portion 1011. The positioning ribs 1012 can be formed by flanging and bending the peripheral wall of the relief portion 1011. The positioning ribs 1012 are located around the module radiator 113 to limit the position of the module radiator 113.

[0043] The electrical box 100 is further provided with a refrigerant radiator 120. The refrigerant radiator 120 is located in the first cavity 102. The refrigerant radiator 120 is closely attached to the module radiator 113 of the drive board assembly 110, so that the heat generated by the power module 112 can be transferred to the refrigerant radiator 120 through the module radiator 113, and the refrigerant radiator 120 takes away the heat.

[0044] The refrigerant radiator 120 includes a radiator body 121 and a refrigerant pipeline 122. The refrigerant pipeline 122 can be connected to the radiator body 121 by means of crimping, welding, expanding, etc.

[0045] The refrigerant pipeline 122 can be in a "U" shape and is installed in the radiator body 121. The two ports of the refrigerant pipeline 122 are connected to the refrigerant system of the air conditioner. Combining with the control system, the low-temperature refrigerant flows through the refrigerant pipeline 122, and the low-temperature refrigerant takes away the heat on the radiator body 121 while flowing in the refrigerant pipeline 122, achieving the heat dissipation effect.

[0046] The radiator body 121 is connected to the module radiator 113 by screws, which can ensure the close attachment of the refrigerant radiator 120 and the module radiator 113, thus ensuring the heat transfer effect.

[0047] According to the embodiment of the present application, a plurality of fins 1211 can be provided on the radiator body 121. Through convective heat exchange with the air, the heat of the electrical components absorbed in the air is conducted to the fins 1211, and then the heat is taken away by the low-temperature refrigerant.

[0048] One end of the radiator body 121 in contact with the module radiator 113 is a plane, which can increase the contact area. The fins 1211 are formed at one end of the radiator body 121 away from the module radiator 113.

[0049] In some embodiments, the fins 1211 of the refrigerant radiator 120 are exposed from the electrical box 100, and the natural flowing air outside the electrical box 100 can be utilized to achieve convective heat exchange.

[0050] In some other embodiments, the electrical box 100 is a closed structure, and the refrigerant radiator 120 is completely located inside the electrical box 100.

[0051] In this embodiment, a cooling fan 130 can be provided inside the electrical box 100. The cooling fan 130 drives the flow of the space inside the electrical box 100. The flowing air inside the electrical box 100 exchanges heat with the fins 1211, and the heat is taken away by the low-temperature refrigerant.

[0052] In the electrical box 100, in addition to the power module 112 with relatively high heat generation, there are other electrical components, such as a filter board, a reactor, as well as a main control board and a terminal block with relatively low heat generation. The heat generated by the electrical components is dissipated into the air, and then under the action of the cooling fan 130, the heat in the air is taken away by the low-temperature refrigerant, thereby realizing the heat conduction and dissipation of the power module 112 and the dissipation of other electrical components.

[0053] If only the cooling fan 130 is provided in the electrical box 100, the air flow is relatively dispersed, and the heat in the air cannot flow to the fins 1211 of the refrigerant radiator 120 relatively concentratedly and quickly. Moreover, since the electrical box 100 has a closed structure, more efficient heat dissipation is required.

[0054] Therefore, in the embodiment of the present application, a heat dissipation air hood 140 is further provided in the electrical box 100. The heat dissipation air hood 140 covers the refrigerant radiator 120 and is connected to the partition 101.

[0055] The heat dissipation air hood 140 and the partition 101 enclose a heat dissipation air duct, and the refrigerant radiator 120 is located in the heat dissipation air duct.

[0056] The heat dissipation air duct is provided with a spaced apart air return opening 1013 and an air outlet 1014. The cooling fan 130 is provided at the air return opening 1013 or at the air outlet 1014, or cooling fans 130 are respectively provided at the air return opening 1013 and the air outlet 1014.

[0057] The cooling fan 130 drives the air in the electrical box 100 to enter the heat dissipation air duct from the air return opening 1013. In the heat dissipation air duct, the heat of the air is transferred to the fins 1211 and then blown out from the air outlet 1014.

[0058] In the air flow direction, the air return opening 1013 and the air outlet 1014 are respectively located on both sides of the refrigerant radiator 120. In this way, the air can pass through the refrigerant radiator 120 in the heat dissipation air duct.

[0059] The setting of the heat dissipation air hood 140 can make the air in the electrical box 100 concentrated in the heat dissipation air duct, improving the heat dissipation efficiency of the electrical components.

[0060] In some embodiments of the present application, the filter board, the reactor, etc. with relatively high heat generation among the electrical components are arranged in the second cavity 103, and the main control board, the terminal block, etc. with relatively low heat generation are arranged in the first cavity 102. The filter board and the reactor are fixedly connected to the partition 101 in the second cavity 103. The main control board and the terminal block are fixedly connected to the partition 101 in the first cavity 102. In order to distinguish the filter board, the reactor, etc. with high heat generation from the main control board and the terminal block with low heat generation, the filter board, the reactor, etc. with relatively high heat generation are called heat-generating electrical components 160.

[0061] The air return opening 1013 and the air outlet 1014 are arranged on the partition plate 101, and the heat dissipation fan 130 is arranged corresponding to the air outlet 1014 in the second cavity 103. The heat dissipation fan 130 is fixedly connected to the partition plate 101.

[0062] The heat dissipation fan 130 can drive the air in the second cavity 103 to pass through the refrigerant radiator 120 of the heat dissipation air duct, so as to realize the heat dissipation of the filter board and the reactor in the second cavity 103.

[0063] Specifically refer to Figure 2 and Figure 4 , the arrow in the figure indicates the air flow direction. The heat dissipation fan 130 can drive the air in the second cavity 103 to enter the heat dissipation air duct through the air return opening 1013, and after heat exchange with the refrigerant radiator 120, it circulates back to the second cavity 103 from the air outlet 1014.

[0064] In other embodiments, filter boards, reactors, etc. with relatively high heat generation in the electrical components are arranged in the first cavity 102. The air return opening 1013 and the air outlet 1014 can be arranged on the heat dissipation air hood 140, and the heat dissipation fan 130 is located in the first cavity 102.

[0065] The heat dissipation fan 130 can drive the air in the first cavity 102 to pass through the refrigerant radiator 120 of the heat dissipation air duct, so as to realize the heat dissipation of the filter board and the reactor in the first cavity 102.

[0066] In this application, arranging the heat dissipation fan 130 and the heat-generating electrical component 160 in the same space can improve the heat dissipation speed of the heat-generating electrical component 160 and ensure the heat dissipation effect of the electrical box 100.

[0067] Exemplarily, refer to Figure 4 , heat-generating electrical components 160 such as filter boards and reactors are located on the left side of the partition plate 101, and the drive board assembly 110 is located on the right side of the partition plate 101; the air return opening 1013 is located below the refrigerant radiator 120, and the air outlet 1014 is located above the refrigerant radiator 120.

[0068] The air outlet end of the heat dissipation fan 130 faces left and downward, so that the air outlet end of the heat dissipation fan 130 faces the heat-generating electrical component 160, which can make the air flow driven by the heat dissipation fan 130 flow towards the heat-generating electrical component 160, thereby improving the heat dissipation speed.

[0069] Exemplarily, the heat-generating electrical component 160 and the drive board assembly 110 are arranged up and down, and the air outlet end of the heat dissipation fan 130 faces downward.

[0070] According to an embodiment of the present application, the fins 1211 extend vertically, the air return opening 1013 and the air outlet 1014 are on the upper and lower sides of the refrigerant radiator 120, and the air flow direction in the heat dissipation air duct is vertical, which is consistent with the extension direction of the fins 1211, can reduce the wind resistance, improve the air flow velocity, and thus improve the heat exchange rate between the air and the fins 1211.

[0071] In some embodiments, the heat dissipation air hood 140 is generally box-shaped and is open on the side facing the partition 101. The heat dissipation air hood 140 includes opposite first wall 141 and second wall 142, the first wall 141 and the second wall 142 are perpendicular to the air flow direction in the heat dissipation air duct, and the third wall 143 is located on the side of the heat dissipation air hood 140 away from the partition 101. An arc-shaped first air guiding surface 144 is provided at the connection of the first wall 141 and the third wall 143, and an arc-shaped second air guiding surface 145 is provided at the connection of the second wall 142 and the third wall 143.

[0072] Exemplarily, the first wall 141 is located on the lower side of the refrigerant radiator 120, that is, the air return opening side, and the second wall 142 is located on the upper side of the refrigerant radiator 120, that is, the air outlet side.

[0073] The arc-shaped settings of the first air guiding surface 144 and the second air guiding surface 145 can reduce the eddy current at both ends of the air duct of the circulating air flow and reduce the wind resistance.

[0074] In some embodiments, the heat dissipation air hood 140 further includes fourth walls 146 connected to the left and right ends of the third wall 143, and the fourth walls 146 are connected to the partition 101.

[0075] The gap between the radiator body 121 and the fourth wall 146 and the gap between the radiator body 121 and the third wall 143 are smaller than the gap between adjacent fins 1211. That is, the gap between the radiator body 121 and the fourth wall 146 is D1, the gap between the radiator body 121 and the third wall 143 is D2, and the gap between two adjacent fins 1211 is D3. D1 is less than D3, and D2 is less than D3.

[0076] In this way, the air flow through D1 and D2 can be reduced, so that the air flow can flow through the fins 1211 as much as possible to ensure the heat dissipation efficiency.

[0077] According to an embodiment of the present application, the fourth wall 146 is provided with a buckle extending towards the partition 101. Correspondingly, the partition 101 is provided with a buckle groove. The buckle being snapped into the buckle groove can realize the positioning connection between the heat dissipation air hood 140 and the partition 101, and then the heat dissipation air hood 140 is fixed to the partition 101 by combining with screws.

[0078] Continue to refer to Figure 5, a pipe groove 147 is further provided on the side wall of the heat dissipation air shroud 140, and the refrigerant pipeline 122 of the refrigerant radiator 120 passes out of the heat dissipation air shroud 140 from the pipe groove 147. The pipe groove 147 can limit the refrigerant pipeline 122.

[0079] Specifically, one side of the pipe groove 147 facing the partition 101 is open, and when assembling, the pipe groove 147 is aligned with the refrigerant pipeline 122 for installation.

[0080] In some embodiments, continue to refer to Figure 4 , Figure 5 , the axis of the heat dissipation fan 130 is parallel to the partition 101, which can make the air flow parallel to the partition 101 and flow to the heating electrical components faster.

[0081] A fan shroud 150 is further provided in the electrical box 100, and the fan shroud 150 is connected to the partition 101 corresponding to the air outlet 1014. An installation opening 151 is provided on the side wall of the fan shroud 150, and the heat dissipation fan 130 is installed at the installation opening 151.

[0082] According to the embodiments of the present application, a temperature sensor is provided near the air return opening 1013, which can detect the air temperature at the air return opening 1013 in real time. According to the air temperature value at the air return opening 1013, the heat dissipation fan 130 or / and the refrigerant flow rate or / and the refrigerant temperature can be adjusted in real time, so as to control the temperature in the electrical box 100 within a relatively stable range, and avoid affecting the service life of the electrical components due to too high temperature or causing condensation in the electrical box 100 due to too low temperature.

[0083] Exemplarily, when the detection value of the temperature sensor is higher than the preset temperature range, control the heat dissipation fan to increase the rotation speed, or increase the refrigerant flow rate at the refrigerant radiator by controlling a flow valve, etc., or reduce the refrigerant temperature at the refrigerant radiator by controlling an expansion valve, etc.; when the detection value of the temperature sensor is lower than the preset temperature range, control the heat dissipation fan to reduce the rotation speed, or reduce the refrigerant flow rate at the refrigerant radiator by controlling a flow valve, etc., or increase the refrigerant temperature at the refrigerant radiator by controlling an expansion valve, etc.

[0084] In the present application, by providing a finned refrigerant radiator 120 for the drive board assembly 110 and a heat dissipation fan 130 in the electrical box 100, the heat of the drive board assembly 110 can be taken away by the low-temperature refrigerant in the refrigerant radiator 120, and moreover, the heat dissipation fan 130 can promote the convective heat transfer between the air in the electrical box and the fins, conduct the heat of the electrical components absorbed in the air to the fins and be taken away by the refrigerant, realizing the heat conduction heat dissipation of the drive board assembly 110 and the air-cooled heat dissipation of other heating electrical components.

[0085] In this application, by providing a closed heat dissipation air duct for the refrigerant radiator 120, with an air return opening and an air outlet provided on both sides of the heat dissipation air duct, under the action of the heat dissipation fan 130, the air inside the electrical box 100 can be concentrated to circulate through the heat dissipation air duct, improving the heat dissipation speed of the heat-generating electrical components and achieving efficient heat dissipation of the closed electrical box.

[0086] In this application, electrical components are respectively provided on both sides of the partition, improving the space utilization rate inside the electrical box and making the structure of the electrical box more compact.

[0087] In this application, the high-heat-generating drive board assembly, heat-generating electrical components, etc. are arranged on the same side of the partition 101, and the low-heat-generating electrical components are arranged on the other side of the partition 101. The heat of the heat-generating electrical components is brought to the air return opening through the circulating air flow, and then passes through the fins inside the heat dissipation air duct and is taken away by the refrigerant; the circulating air flow flows between the two chambers, and its flow path is more reasonable.

[0088] In this application, arc-shaped air guiding surfaces are provided at both ends of the heat dissipation air duct, which can reduce the eddy current of the circulating air flow at the air return opening and the air outlet and reduce the air resistance.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0090] For the sake of convenience of explanation, the above description has been made in combination with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. According to the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. An air conditioner, characterized in that, Comprising: Electrical box; Partition board, which divides the space inside the electrical box into a first cavity and a second cavity, and the partition board is provided with an air return opening and an air outlet; Drive board assembly, which is connected to the partition board and located in the second cavity; Refrigerant radiator, which is attached to the drive board assembly and located in the first cavity, and on the projection of the partition board, the refrigerant radiator is located between the air return opening and the air outlet; Heat dissipation air hood, covering the refrigerant radiator, and the heat dissipation air hood and the partition board enclose a heat dissipation air duct, and the heat dissipation air duct is respectively communicated with the air return opening and the air outlet; Heat dissipation fan, arranged corresponding to the air return opening and / or the air outlet, and located in the second cavity, for driving the air in the second cavity to enter the heat dissipation air duct through the air return opening, and circulating to the second cavity from the air outlet.

2. The air conditioner according to claim 1, characterized in that, There is also a heating electrical component in the second cavity; The air outlet end of the heat dissipation fan faces the heating electrical component.

3. The air conditioner according to claim 1, characterized in that, Also comprising: Fan hood, connected to the partition board corresponding to the air return opening or / and the air outlet, and the side wall of the fan hood is provided with an installation opening; The heat dissipation fan is installed at the installation opening.

4. The air conditioner according to claim 1, wherein The axis of the heat dissipation fan is parallel to the partition board.

5. The air conditioner according to claim 1, characterized in that, The refrigerant radiator includes: Radiator body, which is provided with a plurality of fins, Refrigerant pipeline, passing through the radiator body; The length extension direction of the fins is consistent with the air flow direction of the heat dissipation air duct.

6. The air conditioner according to claim 5, wherein In the plane projection perpendicular to the length direction of the fins, the distance from the outer contour of the fins to the heat dissipation air hood is less than the distance between adjacent fins.

7. The air conditioner according to claim 1, characterized in that The air return opening and the air outlet are respectively located at opposite ends of the heat dissipation air duct; The heat dissipation air hood is provided with an arc-shaped first air guiding surface and a second air guiding surface on the wall far from the partition board, the first air guiding surface is close to the air return opening, and the second air guiding surface is close to the air outlet.

8. The air conditioner according to claim 1, wherein, Also comprising: Temperature sensor, arranged at the air return opening, for detecting the air temperature at the air return opening; Controller, for controlling the rotation speed of the heat dissipation fan according to the detection value of the temperature sensor, so as to control the air temperature inside the electrical box within a preset range.

9. The air conditioner according to claim 1, wherein, The heat dissipation air hood is provided with a pipe groove, and the pipeline of the refrigerant radiator extends out of the heat dissipation air hood from the pipe groove.

10. An air conditioner, characterized in that, Comprising: Electrical box; Partition board, which divides the space inside the electrical box into a first cavity and a second cavity; Drive board assembly, which is connected to the partition board and located in the second cavity; Refrigerant radiator, which is attached to the drive board assembly and located in the first cavity; Heat dissipation air hood, covering the refrigerant radiator, and the heat dissipation air hood and the partition board enclose a heat dissipation air duct, and the heat dissipation air duct is provided with an air return opening and an air outlet, and on the projection of the partition board, the air return opening and the air outlet are respectively located at both ends of the refrigerant radiator; Heat dissipation fan, arranged corresponding to the air return opening and / or the air outlet, for driving the air inside the electrical box to enter the heat dissipation air duct from the air return opening, and after being cooled by the refrigerant radiator, circulating to the inside of the electrical box from the air outlet.

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