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 is arranged in the electrical box; the driving plate assembly is connected to one side of the partition plate; the refrigerant radiator is connected to the side, opposite to the driving plate assembly, of the partition plate and used for dissipating heat of the driving plate assembly; the fan cover covers the refrigerant radiator and is connected with the partition plate, an inclined water guide part is arranged on the bottom wall of the fan cover, and a drainage hole is formed in the water guide part; condensate generated on the refrigerant radiator is discharged from the drainage hole along the water guide part. According to the air conditioner, condensation at the refrigerant radiator can be discharged, and potential safety hazards caused by the fact that the condensation drips to electrical parts are avoided.

Description

Technical Field

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

[0002] The electrical box of an air conditioner usually uses a refrigerant radiator to dissipate heat to ensure the normal and reliable operation of the air conditioner unit at high temperatures. Under certain extreme conditions, such as the simultaneous occurrence of lack of refrigerant, high temperature and high humidity, and failure of refrigerant temperature control, condensation may appear on the surface of the refrigerant radiator. If the condensation drips or spreads to nearby electrical components, it will cause potential safety hazards such as electrical short circuits. Summary of the Invention

[0003] This application provides an air conditioner that can discharge the condensation at the refrigerant radiator, avoiding the potential safety hazards caused by the condensation dripping onto the electrical components.

[0004] In one aspect of this application, an air conditioner includes: an electrical box; a partition plate disposed inside the electrical box; a drive board assembly connected to one side of the partition plate; a refrigerant radiator connected to the side of the partition plate opposite to the drive board assembly for dissipating heat from the drive board assembly; a wind cover covering the refrigerant radiator and connected to the partition plate. An inclined water guide portion is provided on the bottom wall of the wind cover, and a drain hole is provided on the water guide portion. The condensation generated on the refrigerant radiator is discharged from the drain hole along the water guide portion.

[0005] In some embodiments, the water guide portion slopes downward in a direction away from the partition plate.

[0006] In some embodiments, it further includes: a target electrical component disposed below the wind cover; in the projection of the bottom wall of the wind cover, the target electrical component does not intersect with the drain hole.

[0007] In some embodiments, it further includes: a target electrical component disposed below the wind cover; in the projection of the partition plate, the target electrical component does not intersect with the drain hole.

[0008] In some embodiments, a horizontal flat plate portion is further provided on the bottom wall of the wind cover. The flat plate portion is close to the partition plate, and the water guide portion extends from the flat plate portion in a direction away from the partition plate.

[0009] In some embodiments, a first avoidance portion is provided on the partition plate, and the module radiator of the drive board assembly passes through the first avoidance portion. A horizontally extending first positioning portion is provided at the lower edge of the first avoidance portion, and the first positioning portion is located below the module radiator. A sealing gasket is provided between the flat plate portion and the first positioning portion.

[0010] In some embodiments, a vertical flanging portion is further provided at one end of the bottom wall of the air duct cover close to the partition board, and a gasket is provided between the flanging portion and the partition board.

[0011] In some embodiments, the inclination angle of the water guiding portion relative to the horizontal direction is 10 to 15°.

[0012] In some embodiments, mounting ears are provided on the bottom wall of the radiator air duct cover, and the mounting ears are connected to the partition board through fasteners.

[0013] On the other hand, an air conditioner according to the present application includes: an electrical box; a partition board provided in the electrical box; a drive board assembly connected to one side of the partition board; a refrigerant radiator connected to the side of the partition board opposite to the drive board assembly for dissipating heat from the drive board assembly; an air duct cover covering the refrigerant radiator and connected to the partition board, an inclined water guiding portion is provided on the bottom wall of the air duct cover, a drain hole is provided on the water guiding portion, and there is no electrical component vertically below the drain hole; the condensate generated on the refrigerant radiator is discharged from the drain hole along the water guiding portion. Description of the Drawings

[0014] Figure 1 A perspective view of an electrical box in an air conditioner according to some embodiments is shown;

[0015] Figure 2 A cross-sectional view of the electrical box according to some embodiments is shown;

[0016] Figure 3 An internal structure diagram of the electrical box according to some embodiments is shown;

[0017] Figure 4 A perspective view of the electrical box omitting the box body according to some embodiments is shown;

[0018] Figure 5 An exploded view of the electrical box omitting the box body according to some embodiments is shown;

[0019] Figure 6 A perspective view of the air duct cover in the electrical box according to some embodiments is shown;

[0020] Figure 7 A perspective view of the refrigerant radiator in the electrical box according to some embodiments is shown;

[0021] Figure 8 A perspective view of the module radiator in the electrical box according to some embodiments is shown;

[0022] Figure 9 A perspective view of the electrical box omitting the box cover according to some other embodiments is shown;

[0023] Figure 10 Shows Figure 9 A perspective view of the air duct cover omitted

[0024] Figure 11 A schematic diagram of the drainage mechanism of the electrical box according to some other embodiments

[0025] Figure 12 A partial schematic diagram of the drainage mechanism of the electrical box according to some other embodiments

[0026] Figure 13 A cross-sectional view of the refrigerant radiator and the water guide plate of the electrical box according to some other embodiments

[0027] Figure 14 An exploded view of the air duct cover and the water guide plate of the electrical box according to some other embodiments

[0028] Figure 15 A perspective view of the electrical box with the box cover omitted according to still some other embodiments

[0029] Figure 16 A schematic diagram of the electrical box with the box cover omitted according to still some other embodiments

[0030] Figure 17 A cross-sectional view of the refrigerant radiator and the air duct cover of the electrical box according to still some other embodiments

[0031] Figure 18 A perspective view of the air duct cover of the electrical box according to still some other embodiments

[0032] Figure 19 A perspective view of the electrical box in the air conditioner according to some embodiments

[0033] Figure 20 Shows Figure 19 An enlarged view in the direction A in

[0034] Figure 21 An exploded view of the electrical box according to some embodiments

[0035] Figure 22 A perspective view of the top cover and the box cover of the electrical box according to some embodiments

[0036] Figure 23 A cross-sectional view of the electrical box according to some embodiments

[0037] Figure 24 Shows Figure 23 An enlarged view in the direction X in

[0038] Figure 25 Shows Figure 23 An enlarged view in the direction Y in

[0039] Figure 26 Shows a perspective view of the lid of an electrical box according to some embodiments;

[0040] Figure 27 Shows Figure 26 The enlarged view in the Z direction in

[0041] Figure 28 Shows a perspective view of the drive substrate part inside an electrical box according to some embodiments;

[0042] Figure 29 And Figure 30 Shows an exploded view of the drive substrate part inside an electrical box according to some embodiments;

[0043] Figure 31 Shows a perspective view of the IGBT assembly inside an electrical box according to some embodiments;

[0044] Figure 32 Shows a perspective view of the IGBT bracket inside an electrical box according to some embodiments;

[0045] Figure 33 Shows an exploded view of the radiator part inside an electrical box according to some embodiments;

[0046] Figure 34 Shows a cross-sectional view of the IGBT and radiator parts inside an electrical box according to some embodiments;

[0047] Figure 35 Shows Figure 34 The enlarged view in the C direction in

[0048] Figure 36 Shows a cross-sectional view of the IGBT and radiator parts inside an electrical box according to some other embodiments;

[0049] Figure 37 Shows Figure 36 The enlarged view in the B direction in

[0050] In the above figures, 100 is the electrical box; 101 is the partition; 1011 is the first avoidance portion; 1012 is the first positioning portion; 1013 is the air return opening; 1014 is the air outlet; 102 is the first space; 103 is the second space; 104 is the communication portion; 105 is the box body; 1051 is the first bottom edge; 1052 is the second bottom edge; 1053 is the flanging; 1054 is the top flanging; 106 is the box cover; 1061 is the first side portion; 1062 is the second side portion; 1063 is the third side portion; 1064 is the bottom flanging; 107 is the box top cover; 1071 is the first top edge; 1072 is the second top edge; 108 is the support plate; 109 is the accommodation portion; 110 is the drive plate assembly; 111 is the drive plate; 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; 1212 is the bottom fin; 1213 is the warping portion; 122 is the refrigerant pipeline; 130 is the fan; 140 is the 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; 146a is the drain hole; 146b is the drain surface; 146c is the water blocking portion; 147 is the pipe groove; 148 is the notch; 148a is the convex portion; 149 is the water guiding portion; 150 is the fan cover; 151 is the first mounting portion; 160 is the water guiding plate; 161 is the water guiding surface; 162 is the extension portion; 163 is the edge portion; 164 is the water guiding plate body; 165 is the mounting ear; 171 is the first gasket; 1711 is the first end edge wrapping; 172 is the second gasket; 173 is the third gasket; 1731 is the second end edge wrapping;

[0051] 10 is the drive plate bracket; 11 is the buckle; 12 is the threaded post; 13 is the second avoidance portion; 14 is the second positioning portion; 20 is the drive substrate; 30 is the IGBT assembly; 31 is the IGBT; 311 is the housing; 3111 is the mounting post; 3112 is the first screw mounting portion; 312 is the base; 313 is the pin; 32 is the IGBT bracket; 321 is the second mounting portion; 322 is the guiding portion; 323 is the accommodating portion; 40 is the radiator; 41 is the radiator base; 411 is the second screw mounting portion; 412 is the recess; 42 is the refrigerant pipe; 50 is the insulating and heat-conducting gasket; 51 is the third screw mounting portion; 60 is the insulating ring group; 61 is the isolation portion; 62 is the convex ring portion; 70 is the screw; 80 is the nut. Detailed implementation manners

[0052] The air conditioner of the present application can be a split air conditioner with a split outdoor unit and indoor unit, or an integrated air conditioner with an integrated outdoor unit and indoor unit.

[0053] Refer to Figures 1 to 5, the air conditioner according to the embodiment of the present application includes an electrical box 100. Electrical components are provided inside the electrical box 100 to implement the electrical control function of the air conditioner.

[0054] A partition 101 is provided inside the electrical box 100. The partition 101 divides the space inside the electrical box 100 into two parts, which are a first cavity 102 and a second cavity 103 respectively.

[0055] 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 component, and a backing plate 114. Among them, the power component includes a power module 112 and a module heat sink 113.

[0056] 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.

[0057] An exposed portion 1141 is provided on the backing plate 114. The exposed portion 1141 can be a through groove. The module heat sink 113 is connected to the backing plate 114 corresponding to the exposed portion 1141.

[0058] The power module 112 on the drive board 111 is connected in contact with the module heat sink 113, and the drive board 111 is connected to the backing plate 114 through an extended stud.

[0059] The module heat sink 113 is made of a metal material. For example, an aluminum block can be selected. The heat generated by the power module 112 is transferred to the module heat sink 113. One end of the module heat sink 113 away from the power module 112 exposes from the exposed portion 1141 to the backing plate 114.

[0060] The backing plate 114 is connected to the partition 101 to realize the connection of the drive board assembly 110 on the partition 101.

[0061] A first avoidance portion 1011 is also provided on the partition 101 at the position corresponding to the exposed portion 1141. The first avoidance portion 1011 can be an opening provided on the partition 101. The module heat sink 113 is inserted into the first avoidance portion 1011.

[0062] A first positioning portion 1012 extending towards the first cavity 102 is provided on the periphery of the first avoidance portion 1011. The first positioning portion 1012 can be formed by flanging and bending the peripheral wall of the first avoidance portion 1011. The first positioning portion 1012 is located around the module heat sink 113 to limit the position of the module heat sink 113.

[0063] A refrigerant radiator 120 is also provided in the electrical box 100. The refrigerant radiator 120 is located in the first cavity 102. The refrigerant radiator 120 fits tightly against 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 the heat away.

[0064] 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 crimping, welding, expansion, etc.

[0065] The refrigerant pipeline 122 can be in a "U" shape and installed in the radiator body 121. The two ports of the refrigerant pipeline 122 are connected to the refrigerant system of the air conditioner. Combined with the control system, the low-temperature refrigerant flows through the refrigerant pipeline 122. While flowing in the refrigerant pipeline 122, the low-temperature refrigerant takes away the heat on the radiator body 121, thereby achieving the effect of heat dissipation.

[0066] The radiator body 121 is connected to the module radiator 113 by screws, so that the refrigerant radiator 120 and the module radiator 113 are closely fitted, thereby ensuring the heat transfer effect.

[0067] According to an embodiment of the present application, a plurality of fins 1211 may be provided on the radiator body 121 , and heat absorbed by the electrical components in the air may be transferred to the fins 1211 through convection heat exchange with the air, and then the heat may be taken away by the low-temperature refrigerant.

[0068] The end of the heat sink body 121 that is in contact with the module heat sink 113 is flat, which can increase the contact area. The fins 1211 are formed on the end of the heat sink body 121 that is away from the module heat sink 113 .

[0069] In some embodiments, the fins 1211 of the refrigerant radiator 120 are exposed from the electrical box 100 , and the natural flow of air outside the electrical box 100 can be used to achieve convection heat exchange.

[0070] In other embodiments, the electrical box 100 is a closed structure, and the refrigerant radiator 120 is completely located inside the electrical box 100 .

[0071] In this embodiment, a fan 130 may be provided in the electrical box 100, and the fan 130 drives the space in the electrical box 100 to flow, and the flowing air in the electrical box 100 exchanges heat with the fins 1211, and the heat is taken away by the low-temperature refrigerant.

[0072] In addition to the power module 112 with relatively high heat generation in the electrical box 100, 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 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.

[0073] If only the fan 130 is arranged 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. Also, since the electrical box 100 has a closed structure, more efficient heat dissipation is required.

[0074] Therefore, in the embodiment of the present application, referring to Figures 6 to 9 , a wind cover 140 is further arranged in the electrical box 100. The wind cover 140 covers the refrigerant radiator 120 and is connected to the partition board 101.

[0075] The wind cover 140 and the partition board 101 enclose a heat dissipation air duct, and the refrigerant radiator 120 is located in the heat dissipation air duct.

[0076] The heat dissipation air duct is provided with a return air port 1013 and an air outlet 1014 which are spaced apart. The fan 130 is arranged at the return air port 1013 or at the air outlet 1014, or fans 130 are respectively arranged at the return air port 1013 and the air outlet 1014.

[0077] Combined with Figure 2 , Figure 2 The arrows in show the flow direction of the heat dissipation air. The fan 130 drives the air in the electrical box 100 to enter the heat dissipation air duct from the return air port 1013. After the heat of the air is transferred to the fins 1211, it is blown out from the air outlet 1014, and the heat on the fins is taken away by the low-temperature refrigerant.

[0078] In the air flow direction, the return air port 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.

[0079] The arrangement of the wind cover 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.

[0080] In some embodiments of the present application, heat-generating components such as filter plates and reactors with relatively high heat generation are arranged in the second cavity 103, and main control boards, terminal blocks, etc. with relatively low heat generation are arranged in the first cavity 102. The filter plates and reactors are fixedly connected to the partition 101 in the second cavity 103. The main control boards and terminal blocks are fixedly connected to the partition 101 in the first cavity 102. In order to distinguish the filter plates, reactors, etc. with high heat generation from the main control boards, terminal blocks, etc. with low heat generation, the filter plates, reactors, etc. with relatively high heat generation are referred to as heat-generating electrical components 160.

[0081] Combined with Figure 3 and Figure 4 , an air return opening 1013 and an air outlet 1014 are arranged on the partition 101, and a fan 130 is arranged corresponding to the air outlet 1014 in the second cavity 103. The fan 130 is fixedly connected to the partition 101.

[0082] Figure 4 The arrow in indicates the air flow direction in the second cavity 103. The fan 130 can drive the air in the second cavity 103 to enter the heat dissipation air duct from the air return opening 1013, thereby realizing the air-cooled heat dissipation of the filter plates and reactors in the second cavity 103.

[0083] In other embodiments, heat-generating components such as filter plates and reactors with relatively high heat generation are arranged in the first cavity 102, the air return opening 1013 and the air outlet 1014 can be arranged on the air hood 140, and the fan 130 is located in the first cavity 102.

[0084] The fan 130 can drive the air in the first cavity 102 to pass through the refrigerant radiator 120 of the heat dissipation air duct, thereby realizing the heat dissipation of the filter plates and reactors in the first cavity 102.

[0085] In the present application, arranging the 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.

[0086] Exemplarily, specifically referring to Figure 4 , heat-generating electrical components 160 such as filter plates and reactors are located on the left side of the partition 101, and the drive board assembly 110 is located on the right side of the partition 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.

[0087] The air outlet end of the fan 130 faces left and downward, so that the air outlet end of the fan 130 faces the heat-generating electrical component 160. The air flow driven by the fan 130 can flow towards the heat-generating electrical component 160, thereby improving the heat dissipation speed.

[0088] In other embodiments, the heat-generating electrical component 160 and the drive board assembly 110 are arranged up and down, and the air outlet end of the fan 130 faces downward.

[0089] According to an embodiment of the present application, the fin 1211 extends 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 fin 1211, can reduce the wind resistance, increase the air flow velocity, and thus improve the heat exchange rate between the air and the fin 1211.

[0090] In some embodiments, specifically referring to Figure 6 , the air hood 140 is generally box-shaped and is open on the side facing the partition 101. The 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 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.

[0091] 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.

[0092] 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.

[0093] In some embodiments, the air hood 140 further includes two fourth walls 146, and the fourth walls 146 are connected to the left and right ends of the third part 143, and the fourth walls 146 are parallel to the extension direction of the fin 1211.

[0094] The gap between the radiator body 121 and the fourth wall 146 and the gap between the radiator body 121 and the fifth wall 147 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 fifth wall 147 is D2, and the gap between adjacent two fins 1211 is D3, D1 is less than D3, and D2 is less than D3.

[0095] In this way, the air flow through D1 and D2 can be reduced, so that the air flow can flow through the fin 1211 as much as possible to ensure the heat dissipation efficiency.

[0096] 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 air hood 140 and the partition 101, and then the air hood 140 is fixed to the partition 101 by combining with screws.

[0097] A pipe groove 147 is also provided on the side wall of the air shroud 140, and the refrigerant pipeline 122 of the refrigerant radiator 120 passes through the air shroud 140 from the pipe groove 147. The pipe groove 147 can limit the refrigerant pipeline 122.

[0098] Specifically, one side of the pipe groove 147 facing the partition 101 is open, and the pipe groove 147 is aligned with the refrigerant pipeline 122 for installation during assembly.

[0099] In some embodiments, the axis of the fan 130 is parallel to the partition 101, which can make the air flow parallel to the partition 101 and flow to the heat-generating electrical components faster.

[0100] Combined Figure 4 and Figure 5 , 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. A first mounting portion 151 is provided on the side wall of the fan shroud 150. The first mounting portion 151 can be an opening provided on the side wall, and the fan 130 is mounted at the first mounting portion 151.

[0101] According to an embodiment of the present application, a temperature sensor is provided near the air return port 1013 to detect the air temperature at the air return port 1013 in real time. According to the air temperature value at the air return port 1013, the fan 130 or / and the refrigerant flow rate or / and the refrigerant temperature can be adjusted in real time to control the temperature in the electrical box 100 within a relatively stable range, avoiding the influence of too high temperature on the service life of the electrical components or the formation of condensation in the electrical box 100 due to too low temperature.

[0102] Exemplarily, when the detection value of the temperature sensor is higher than the preset temperature range, the cooling fan is controlled to increase the rotation speed, or the refrigerant flow rate at the refrigerant radiator is increased by controlling a flow valve, etc., or the refrigerant temperature at the refrigerant radiator is reduced by controlling an expansion valve, etc.; when the detection value of the temperature sensor is lower than the preset temperature range, the cooling fan is controlled to reduce the rotation speed, or the refrigerant flow rate at the refrigerant radiator is reduced by controlling a flow valve, etc., or the refrigerant temperature at the refrigerant radiator is increased by controlling an expansion valve, etc.

[0103] The refrigerant radiator 120 can effectively remove the heat dissipated in the electrical box 100, ensuring the normal and reliable operation of the air conditioner at high temperatures. In some extreme cases, such as when the refrigerant is lacking, the temperature and humidity are high, and the refrigerant temperature control fails simultaneously, condensation may occur on the surface of the refrigerant radiator 120. To prevent the condensation from spreading to nearby electrical components and causing safety hazards such as electrical short circuits, for example, the condensation may seep into the electrical components below the wind cover 140 through the gap between the wind cover 140 and the partition 101, or even if the gap between the wind cover 140 and the partition 101 is sealed and the condensation cannot flow out of the wind cover 140, under the action of the fan 130, the condensation will also flow with the cooling air flow to other electrical components in the electrical box. Therefore, the condensation must be discharged from the wind cover 140 to avoid safety hazards. The following structural optimizations are made in this application:

[0104] Referring to Figures 9 to 14 , a water guiding surface 161 and a drain hole 146a are provided on the bottom wall forming the cooling air duct. The water guiding surface 161 is specifically located below the radiator body 121 and is used to collect the condensation dripping from the refrigerant radiator 120 and then guide the condensation to the drain hole 146a for discharge. In this way, the spread of condensation can be avoided, and the safety hazard of electrical short circuits easily caused by condensation can be solved.

[0105] In some embodiments, a water guiding plate 160 is provided in the electrical box 100. The water guiding plate 160 is provided below the refrigerant radiator 120, and the upper surface of the water guiding plate 160 forms the water guiding surface 161.

[0106] A notch 148 is provided on the lower wall of the wind cover 140, and the water guiding plate 160 is connected at the notch 148. The water guiding surface 161 of the water guiding plate 160 forms a part of the inner wall of the cooling air duct. At this time, the drain hole 146a can be provided on the water guiding plate 160, that is, at the lowest point of the water guiding surface 161.

[0107] Alternatively, a notch 148 is provided on the bottom wall of the wind cover 140, and the water guiding plate 160 is connected at the notch 148. The water guiding surface 161 of the water guiding plate 160 forms a part of the inner wall of the cooling air duct. At this time, a drain hole 146a is provided on the bottom wall of the wind cover 140, and the water guiding plate 160 guides the condensation to the drain hole 146a.

[0108] If there are electrical components below the drain hole 146a, a pipeline communicating with the drain hole 146a can be provided.

[0109] Since there is no air flow in the first space 102, there is no need to worry about the condensation spreading upward. The condensation on the bottom wall of the electrical box 100 will slowly dry over time; or the condensation on the bottom wall can flow out of the electrical box 100 through the gaps in the bottom wall of the electrical box 100; or, a communication part 104 is also provided on the bottom wall of the electrical box 100. The communication part 104 can be in the shape of a hole and can communicate with the drain hole 146a, so that the condensation is discharged from the drain hole 146a and then continues to be discharged from the communication part 104 out of the electrical box 100.

[0110] Exemplarily, in the up-down direction, the communication part 104 is directly below the drain hole 146a, and the condensation drips from the drain hole 146a to the communication part 104 under the action of gravity.

[0111] Or, if there are electrical components between the drain hole 146a and the communication part 104, a pipeline can be provided between the drain hole 146a and the communication part 104, and the condensation is discharged through the pipeline.

[0112] In some embodiments, specifically referring to Figure 12 , the arrows in the figure indicate the flow path of the condensation. The refrigerant pipeline 122 of the refrigerant radiator 120 extends vertically after coming out of the wind cover 140. Then, the drain hole 146a can be a hole provided on the wind cover 140 to avoid the refrigerant pipeline 122, and the communication part 104 can be a hole provided on the electrical box 100 to avoid the refrigerant pipeline 122. That is to say, the refrigerant pipeline 122 passes through the wind cover 140 from the drain hole 146a and continues to pass through the electrical box 100 from the communication part 104. The condensation flows out of the wind cover 140 from the gap between the drain hole 146a and the refrigerant pipeline 122 and continues to flow out of the electrical box 100 from the gap between the communication part 104 and the refrigerant pipeline 122.

[0113] Specifically, the water guide plate 160 can completely cover the radiator body 121 from below, so that the condensation on the radiator body 121 can be completely collected by the water guide plate 160.

[0114] The water guide surface 161 on the water guide plate 160 is inclined, so that the condensation flows along the water guide surface 161 to the drain hole 146a under the action of gravity.

[0115] In an embodiment where the refrigerant pipe 122 passes through the air duct 140 from the drain hole 146a and continues to pass through the electrical box 100 from the communication part 104, the water guide plate 160 directly extends to the position of the refrigerant pipe 122. Alternatively, if the water guide plate 160 has a lateral spacing from the drain hole 146a, then a portion of the inner bottom surface of the air duct 140 located between the water guide plate 160 and the drain hole 146a is referred to as a drain surface 146b. The drain surface 146b is provided as an inclined surface inclined towards the drain hole 146a, and the drain hole 146a is located at the lowest point of the drain surface 146b. Thus, the condensed water can be guided by the water guide plate 161 to the drain surface 146b and then continue to flow along the drain surface 146b to the drain hole 146a.

[0116] In some embodiments, the water guiding surface 161 of the water guide plate 161 is higher than the drain surface 146b. The drain surface 146b has a water blocking portion 146c extending upward at one end close to the partition 101, and the water blocking portion 146c is used to block the condensed water from flowing out through the gap between the air duct 140 and the partition 101.

[0117] Specifically, referring to Figure 14 , a convex portion 148a extending upward is provided at one end of the notch 148 close to the drain hole 146a; an extension portion 162 extending towards the drain hole 146a is provided at one end of the water guide plate 161 close to the drain hole 146a. The top surface of the extension portion 162 is a part of the water guiding surface 161, and the extension portion 162 abuts against the upper end of the convex portion 148a.

[0118] According to an embodiment of the present application, the water guide plate 160 is provided with an upturned edge portion 163 at one end away from the partition 101, which can block the condensed water from flowing out of the water guide plate 160 from the front side edge of the water guide plate 160.

[0119] The water guide plate 160 can be connected to the partition 101 in a form of combining claws and screws, which can reduce the number of screws used. The claws can be non-detachable claws to avoid off-site disassembly.

[0120] Specifically, the water guide plate 160 may include a water guide plate body 164 and mounting ears 165, and the mounting ears 165 are formed by extending downward from the lower end of the water guide plate body 164. The claws can be provided on the water guide plate body 164, and the screws are connected to the partition 101 from the mounting ears 165.

[0121] A sealing cotton pad can be provided at the connection between the water guide plate 160 and the partition 101 to prevent the condensed water from leaking through the gap between the water guide plate 160 and the partition 101. Specifically, the sealing cotton pad can be pasted on the water guide plate 160, and after the water guide plate 160 is installed, the sealing cotton pad is squeezed.

[0122] In some embodiments, referring to Figure 13, the fins 1211 on the refrigerant radiator 120 are in a horizontally extending structural form, and the lowermost fin is called the bottom fin 1212.

[0123] One end of the bottom fin 1212 away from the partition 101 has an upwardly warped portion 1213. The bottom fin 1212 covers the upper fins from below to collect the condensed moisture flowing down from the upper fins and discharge it from both sides of the bottom fin 1212.

[0124] The bottom surface of the bottom fin 1212 can be attached with a heat-insulating cotton pad. For example, a layer of heat-insulating cotton pad can be pasted on the bottom surface of the bottom fin 1212 to prevent condensation on the lower part of the bottom fin 1212.

[0125] In some embodiments, the first positioning portion 1012 on the partition 101 extends towards the first space 102. In the direction perpendicular to the partition 101, the length of the lowermost first positioning portion 1012 is not less than 8 mm, which can block the condensation of the module radiator 113 and prevent the condensed moisture from flowing into the gap between the water guide plate 160 and the partition 101.

[0126] In some other embodiments of the condensate discharge, refer to Figures 15 to 18 , an inclined water guide portion 149 is provided on the bottom wall of the air hood 140, so that the condensed moisture flows under the action of gravity after dropping onto the inclined water guide portion 149. At the same time, a drain hole 146a is provided at the lowest position of the water guide portion 149.

[0127] An inclined water guide portion 149 and a drain hole 146a are provided on the bottom wall of the air hood 140. Thus, the condensed moisture flows to the drain hole 146a under the action of gravity after dropping onto the inclined water guide portion 149 and is discharged from the air hood 140.

[0128] The drain hole 146a is a micro-hole, and at the same time, there can be a plurality of drain holes 146a arranged at intervals.

[0129] The shape of the drain hole 146a can be at least one of a circular shape, a diamond shape, a rectangular shape, etc. When the drain hole 146a is a circular hole, its inner diameter may not be greater than the width between the fins; when the drain hole 146a is a rectangle, its length may not be greater than the width between the fins.

[0130] The form of the micro-holes can prevent a large amount of air in the air hood 140 from leaking from the drain holes 146a, greatly reducing the influence of the openings on the air hood 140 on the heat dissipation efficiency. The form of a plurality of micro-holes can ensure the drainage efficiency and avoid the problem that the drain holes 146a are too small and the condensed moisture cannot be discharged in time and accumulates.

[0131] Specifically refer to Figure 17, the arrows in the figure indicate the direction of condensate flow. In the direction away from the partition 101, the water guiding part 149 slopes downward. Therefore, the drain hole 146a is provided at one end of the water guiding part 149 away from the partition 101. Specifically, the drain hole 146a can be located at the bottom corner of the air shroud 140 away from the partition 101.

[0132] The inclination angle of the water guiding part 149 relative to the horizontal direction can be set to 10° - 15°. If the inclination angle is too small, it is not conducive to the flow of condensate along the water guiding part 149. If the inclination angle is too large, the space between the water guiding part 149 and the fin 1211 will increase, and when the air flow passes through this part of the space without contacting the fin 1211, the heat dissipation efficiency of air cooling will be reduced. Therefore, an inclination angle of 10° - 15° can not only ensure the smooth discharge of condensate but also minimize the impact on the heat dissipation efficiency.

[0133] There are no electrical components vertically below the drain hole 146a, which can prevent the condensate from dripping onto the electrical components after being discharged from the drain hole 146a.

[0134] In some embodiments, electrical components are provided below the air shroud 140. For the convenience of description, the electrical components below the air shroud 140 will be referred to as the target electrical component 115 hereinafter.

[0135] In the projection of the bottom wall of the air shroud 140, the target electrical component 115 does not intersect with the drain hole 146a. Specifically, the target electrical component 115 is close to the partition 101, and the drain hole 146a is far from the partition 101, so that the drain hole 146a is not directly above the target electrical component 115, and the condensate will not drip onto the target electrical component 115.

[0136] In the projection of the partition 101, the target electrical component 115 does not intersect with the drain hole 146a. In this way, the drain hole 146a can be made as far away from the target electrical component 115 as possible, so that the condensate will not easily drip onto the target electrical component 115 even when the electrical box vibrates due to external force.

[0137] In some embodiments, specifically referring to Figure 18 , an isolation part 149a is provided on the bottom wall of the air shroud 150, and the top surface of the isolation part 149a is horizontal. In the direction parallel to the air flow, the isolation part 149a and the water guiding part 149 are arranged crosswise.

[0138] If the entire bottom wall of the air shroud 150 is set as the water guiding part 149, since the water guiding part 149 is inclined, the space between the water guiding part 149 and the fin 1211 will be relatively large. Because the air resistance of this part of the space is small, the heat dissipation air flow will flow more through this part of the space without passing through the fin, thus reducing the heat dissipation efficiency.

[0139] Part of the bottom wall of the air duct 150 is set as the water guiding part 149, and the non-water guiding part 149 is the isolation part 149a. Since the distance between the isolation part 149a and the fin 1211 is still relatively small, it can block the air flow that does not pass through the fin.

[0140] The bottom wall of the air duct 140 further includes a flat plate part 149b. The flat plate part 149b is connected to one end of the water guiding part 149 close to the partition 101, and the flat plate part 149b is perpendicular to the partition 101.

[0141] Refer to Figure 17 and Figure 18 , the flat plate part 149b abuts against the first positioning part 1012. A gasket can be arranged between the flat plate part 149b and the first positioning part 1012, thereby sealing the bottom end of the air duct 140 and preventing the condensed water from seeping out from the gap between the air duct 140 and the partition 101.

[0142] One end of the flat plate part 149b close to the partition 101 is also provided with a vertical flanging part 149c. The flanging part 149c and the flat plate part 149b are in an "L" shape. The flanging part 149c abuts against the partition 101. A gasket can be arranged between the flanging part 149c and the partition 101, thereby sealing between the air duct 140 and the partition 101.

[0143] Specifically, the gasket is pasted on the air duct 140, and the gaskets on the flat plate part 149b and the flanging part 149c are integrally formed.

[0144] In this application, by arranging the gaskets between the flat plate part 149b and the first positioning part 1012, and between the flanging part 149c and the partition 101, the air duct 140 and the partition 101 can be sealed, preventing the condensed water from seeping out from the gap between the air duct 140 and the partition 101.

[0145] The bottom end of the flanging part 149c is provided with a downward extending mounting ear 165. The screw passes through the mounting ear 165 and the partition 101, thereby firmly connecting the air duct 140 and the partition 101, and clamping the gasket at the same time.

[0146] In some embodiments, a wiring part 1401 is provided on the air duct 140. Specifically, the wiring part 1401 can be arranged at the top of the air duct 140, and a plurality of wiring parts 1401 are arranged at intervals in the left-right direction.

[0147] The wiring part 1401 is provided with a wire slot 1402, and the wires in the first space 102 can be clamped into the wire slot 1402. The wiring part 1401 and the air duct 140 are integrally formed, which is relatively easy to manufacture and can omit adding other wiring structures at other positions in the electrical box.

[0148] According to an embodiment of the present application, the wiring portion 1401 includes a first hook portion 1403 and a second hook portion 1404. The openings of the first hook portion 1403 and the second hook portion 1404 face in opposite directions and are offset from each other.

[0149] Exemplarily, the opening of the first hook portion 1403 faces the rear side, the opening of the second hook portion 1404 faces the front side, and the first hook portion 1403 and the second hook portion 1404 are offset left and right.

[0150] There may be two first hook portions 1403 arranged at intervals left and right, and the second hook portion 1404 is located between the two first hook portions 1403; the second hook portion 1404 is upturned, which is beneficial to the insertion of the wire.

[0151] A wire slot 1402 is formed between the first hook portion 1403 and the second hook portion 1404. The wire can be inserted into the wire slot 1402 from the opening of the hook portion.

[0152] In some usage scenarios, there are relatively high requirements for the protection level of the electrical box 100, and the electrical box 100 needs to have high tightness.

[0153] For example, for a closed electrical box, there are no holes connecting to the outside on the electrical box, but in the face of the demand for a relatively high protection level, the connection gaps on the electrical box always cannot meet the sealing requirements. The present application conducts a structural design for the tightness of the electrical box.

[0154] Refer to Figures 19 to 27 , the electrical box 100 includes a box body 105 and a box cover 106. The box body 105 is generally in the shape of a cuboid, one side of the box body 105 is open, and the box cover 106 is connected to the open side of the box body 105.

[0155] In some cases, the box cover 106 is connected to the side of the box body 105. For example, taking the outdoor unit of an air conditioner as an example, define the side where the air outlet is located in the outdoor unit of the air conditioner as the front side, and the opposite air inlet side as the rear side. Especially for the outdoor unit with top air outlet, generally, the operator needs to perform maintenance and repair on the machine from the front side. The box cover 106 of the electrical box 100 is arranged on the front side of the box body 105, and the box cover 106 can be directly opened from the front side to operate the electrical components in the electrical box 100.

[0156] For the left and right sides, as well as the bottom of the box body 105 and the box cover 106, the sealing requirements can be met only by pressing the sealing gasket. However, for the connection gap between the box body 105 and the box cover 106 at the top, if only in the form of pressing the sealing gasket, once the sealing gasket at the top gap is not pressed tightly and fails, water will seep down from the top gap, bringing potential safety hazards.

[0157] In an embodiment of the present application, the top wall of the box body 105 is defined as the box top cover 107. Specifically, the box body 105 further includes a box main body 108 and a box top cover 107, and the box main body 108 and the box top cover 107 are of an integral structure.

[0158] In other embodiments, the box top cover 107 and the box main body 108 are of a two-piece connection structure. The four sides of the box top cover 107 have downwardly extending flanges. In the assembled state, the flanges surround the top end of the box main body 108, and then the box top cover 107 and the box main body 108 can be connected by screws. The seams of the four flanges can be optionally welded or sealed with sealant.

[0159] The following takes the box cover 106 connected to the front end of the box main body 108 as an example for introduction:

[0160] Referring to Figure 23 、 Figure 24 the box top cover 107 includes a first top edge 1071 and a second top edge 1072. The first top edge 1071 generally extends horizontally, and the second top edge 1072 is formed by extending downward from the front end of the first top edge 1071.

[0161] Specifically, the first top edge 1071 is arranged in an inclined shape and slopes downward in the direction away from the box cover 106 (from front to back). In this way, rainwater flows downward in the direction away from the box cover 106 under the guidance of the inclined surface of the first top edge 1071, and the rainwater flowing to the connection between the box top cover 107 and the box cover 106 can be reduced.

[0162] Combining Figure 22 and Figure 24 a support plate 108 is connected to the inner side of the box top cover 107. A receiving portion 109 is formed between the support plate 108 and the second top edge 1072, and the receiving portion 109 can be in a groove shape. The top end of the box cover 106 is inserted into the receiving portion 109, the rear end of the box cover 106 abuts against the support plate 108, a sealing gasket is provided between the front end of the box cover 106 and the second top edge 1072, and a sealing gasket is provided between the top end of the box cover 106 and the first top edge 1072.

[0163] The support plate 108 can be arranged in an inverted "U" shape. The top wall of the support plate 108 is connected to the first top edge 1071 by screws, the rear side wall of the support plate 108 is connected to the partition 101 in the electrical box 100, and the front side wall of the support plate 108 is in a cantilever state.

[0164] According to an embodiment of the present application, the top end of the box cover 106 is generally in a "C" shape and includes a first side portion 1061, a second side portion 1062, and a third side portion 1063.

[0165] The first side portion 1061 covers the front side of the box body 105. The second side portion 1062 is formed by horizontally extending backward from the top end of the first side portion 1061. The third side portion 1063 is formed by extending downward from the rear end of the second side portion 1062. The third side portion 1063 abuts against the support plate 108. A gasket is provided between the second side portion 1062 and the first top edge 1072 for sealing, and a gasket is provided between the first side portion 1061 and the second top edge 1072 for sealing.

[0166] The gasket between the first side portion 1061 and the second top edge 1072 forms a first-stage seal in the vertical direction, and the gasket between the second side portion 1062 and the first top edge 1072 forms a second-stage seal in the horizontal direction. The multi-stage seal can enhance the sealing effect between the box top cover 107 and the top end of the box cover 106 to meet a higher level of protection effect.

[0167] The support plate 108 limits the rear end of the box cover 106, and can squeeze the gasket between the first side portion 1061 and the second top edge 1072 to ensure the sealing effect between the box cover 106 and the box top cover 107 in the vertical direction.

[0168] In some embodiments, the gaskets between the second side portion 1062 and the first top edge 1072, and between the first side portion 1061 and the second top edge 1072 can be an integral structure. The L-shaped gasket adheres to the first side portion 1061 and the second side portion 1062. The L-shaped gasket enhances the sealing performance at the box top cover and at the same time avoids the gasket being torn off and falling during the installation and disassembly process, improving the connection reliability. In this application, in order to distinguish from the subsequent gaskets, the gaskets at the first side portion 1061 and the second side portion 1062 are referred to as the first gasket 171.

[0169] An L-shaped second gasket 172 can be connected to the first top edge 1071. The second side portion 1062 and the first top edge 1071 are sealed by the first gasket 171 and the second gasket 172.

[0170] Refer to Figure 26 and Figure 27 , the first gasket 171 has first end edge wrappings 1711 that fold back inward at the left and right ends of the first side portion 1061. The first end edge wrapping 1711 at the left end can achieve the sealing between the box cover 106 and the left side wall of the box body 105, and the first end edge wrapping 1711 at the right end can achieve the sealing between the box cover 106 and the right side wall of the box body 105; in addition, the end edge wrapping can prevent the end of the gasket from being torn off and falling during the installation and disassembly process, which affects the sealing performance.

[0171] In some embodiments, refer to Figure 23 and Figure 25, at the front end of the bottom wall of the box body 105, there is a first bottom edge 1051 extending vertically downward, and a second bottom edge 1052 extending horizontally forward from the bottom end of the first bottom edge 1051. The first bottom edge 1051 and the second bottom edge 1052 form an L-shaped structure.

[0172] At the bottom end of the box cover 106, there is a bottom folding edge 1064 extending horizontally forward. The first side portion 1061 of the box cover 106 abuts against the first bottom edge 1051, and the bottom folding edge 1064 of the box cover 106 abuts against the second bottom edge 1052.

[0173] The bottom folding edge 1064 forms an upward supporting force on the box cover 106, which can make the gasket between the top end of the box cover 106 and the first top edge 1071 be squeezed tightly, ensuring the sealing effect between the top end of the box cover 106 and the box top cover 107.

[0174] There is a gasket between the lower part of the box cover 106 and the first bottom edge 1051. Specifically, the gasket can be adhered to the box cover 106.

[0175] According to the embodiments of the present application, continue to refer to Figure 24 , the bottom end of the second top edge 1072 inclines forward, so that the bottom end of the accommodating part 109 forms a flared shape, which plays a guiding role in inserting the box cover 106.

[0176] During assembly, first insert the top end of the box cover 106 into the accommodating part 109 at the top end, and then place the bottom folding edge 1064 of the box cover 106 on the second bottom edge 1052.

[0177] The bottom end part of the support plate 108 can incline backward, so that the bottom end of the accommodating part 109 forms a flared shape, which plays a guiding role in inserting the box cover 106.

[0178] Refer to Figure 20 and Figure 27 , at the front ends of the left and right side walls of the box body 105, there are outward flanging edges 1053, and there is a third gasket 173 between the box cover 106 and the flanging edges 1053.

[0179] The left and right sides of the box cover 106 are connected to the flanging edges 1053 by screws, thereby squeezing the third gasket 173 tightly.

[0180] In some embodiments, the top end of the flanging edge 1053 has a top folding edge 1054 extending forward, and the top folding edge 1054 can prevent rainwater and the like from seeping into the interior of the electrical box 100 along the gap between the box cover 106 and the box body 105 from top to bottom.

[0181] The top end of the lid 106 abuts against the top fold 1054. The third gasket 173 can be attached to the rear end of the lid 106. The top end of the third gasket 173 has a second end edge 1731 that folds back forward and downward. The second end edge 1731 can achieve the sealing of the left and right sides of the top of the lid 106 and the box body 105. In addition, the end edge can prevent the end of the gasket from being torn off during the installation and disassembly process, which affects the sealing performance.

[0182] In some embodiments, referring to Figures 28 to 37 , a drive board bracket 10, a drive substrate 20, an IGBT module 30, and a heat sink 40 are provided inside the electrical box 100.

[0183] The drive board bracket 10 is generally in the shape of a rectangular parallelepiped box, and its material can be selected as plastic and formed by injection molding.

[0184] The drive substrate 20 can be a PCB board, and electrical components are connected thereto. The electrical components are connected to the front side of the drive substrate 20. The drive substrate 20 is installed inside the drive board bracket 10.

[0185] Specifically, the drive substrate 20 can be connected to the inside of the drive board bracket 10 by a combination of screws and snaps. Snap tabs 11 extending outward are provided on the four side walls of the drive board bracket 10, and a plurality of threaded posts are provided inside the drive board bracket 10. Correspondingly, through screw mounting holes are provided on the drive substrate 20. In the assembled state, the snap tabs 11 latch the drive substrate 20 from all around, and the screws pass through the screw mounting holes on the drive substrate 20 and are tightly connected to the threaded posts 12, thereby firmly connecting the drive substrate 20 and the drive board bracket 10.

[0186] Referring to Figure 31 , the IGBT module 30 includes an IGBT 31 and an IGBT bracket 32. The IGBT 31 is mounted on the IGBT bracket 32, and the pins 313 of the IGBT 31 are soldered to the drive substrate 20 from the back side.

[0187] The IGBT 31 includes a housing 311, a base 312, and pins 313.

[0188] The housing 311 is made of plastic material and can play an insulating role. A groove is provided on the housing 311, and a protruding mounting post 3111 is provided in the groove. A first screw mounting portion 3112 is provided on the mounting post 3111, and the first screw mounting portion 3112 penetrates through the housing 311.

[0189] The base 312 is made of metal material. The base 312 is attached to the chip inside the housing 311, and the heat generated by the internal chip is transferred to the base 312, and then the base 312 is attached to the heat sink 40, so as to further transfer the heat to the heat sink 40.

[0190] Pin 311 is L-shaped, and the free end of pin 313 is welded to the drive substrate 20 to realize the connection between the IGBT and the drive substrate 20.

[0191] Refer to Figure 32 , the IGBT bracket 32 is used to mount the IGBT 31. The IGBT bracket 32 can be made of plastic material to ensure insulation between the IGBT 31 and the IGBT bracket 32.

[0192] The IGBT bracket 32 is generally block-shaped, and is provided with a plurality of recessed second mounting portions 321 thereon. The number of the second mounting portions 321 corresponds to the number of the IGBTs 31. Exemplarily, there are 12 IGBTs 31, and there are also 12 second mounting portions 321. Taking the center line on the IGBT bracket 32 as a reference, the second mounting portions 321 are symmetrically arranged in two rows, with 6 in each row.

[0193] The second mounting portion 321 is located on the side of the IGBT bracket 32 away from the drive substrate 20; after the IGBT 31 is mounted to the second mounting portion 321, the free end of the pin 313 extends toward the drive substrate 20 side.

[0194] A guiding portion 322 is provided at a position corresponding to the pin 313 on the IGBT bracket 32. The guiding portion 322 can be an opening provided on the IGBT bracket 32, and a plurality of pin welding holes are correspondingly provided on the drive substrate 20. The pin 313 passes through the guiding portion 322 and then is inserted into the pin welding hole. The guiding portion 322 has a guiding and positioning effect on the pin 313. The guiding portion 322 restricts the positions of multiple groups of pins 313, which facilitates the accurate insertion of multiple groups of pins 313 into the pin welding holes of the drive substrate 20, and can also avoid the problem of insulation failure caused by the pins 313 being too close due to deformation or the like.

[0195] The IGBT bracket 32 of the present application can restrict the positions of multiple groups of IGBTs, especially multiple groups of pins 313, which facilitates subsequent installation. In addition, the IGBT bracket can ensure the insulation requirements between subsequent screws, nuts and the drive substrate 20.

[0196] During assembly, first insert the pin 313 of the IGBT 31 into the guiding portion 322 of the IGBT bracket 32, then continue to place the IGBT 31 into the second mounting portion 321 of the IGBT bracket 32, then weld the pin 313 of the IGBT assembly 30 to the drive substrate 20, and then mount the drive substrate 20 with the IGBT assembly 30 onto the drive board bracket 10.

[0197] Refer to Figure 29, the radiator 40 can specifically be a refrigerant radiator. The radiator 40 is made of metal, preferably aluminum, and includes a radiator base 41 and refrigerant pipes 42. The refrigerant pipes 42 can be connected to the radiator base 41 by means of crimping, welding, expanding, etc.

[0198] The refrigerant pipes 42 can be in a "U" shape and are installed inside the radiator base 41. Both ends of the refrigerant pipes 42 are connected to the refrigerant system of the air conditioner. While the low-temperature refrigerant flows through the refrigerant pipes 42, it takes away the heat on the radiator base 41, achieving the heat dissipation effect.

[0199] The radiator 40 is generally in a cuboid block shape. It can be connected to the drive board bracket 10 by connection forms such as screws and is in close contact with the base 312 of the IGBT 30 assembly 30. Thus, the radiator base 41 absorbs the heat of the IGBT 31, and at the same time, the low-temperature refrigerant in the refrigerant pipes 42 takes away the heat in time, ensuring the heat dissipation requirements of the IGBT 31.

[0200] The radiator 40 is connected to the outside of the drive board bracket 10; at the same time, a through second avoidance portion 13 is provided on the drive board bracket 10, and the radiator 40 contacts the IGBT 31 from the second avoidance portion 13.

[0201] Since the radiator 40 is located outside the drive board bracket 10, it can also use forms such as air cooling for heat dissipation, and the heat dissipation effect is better. However, in other embodiments, the radiator 40 can also be located inside the drive board bracket 10.

[0202] According to the embodiment of the present application, a second positioning portion 14 surrounded by convex ribs is provided on the drive board bracket 10, and the radiator 40 is installed in the second positioning portion 14 to achieve the positioning between the radiator 40 and the drive board bracket 10, and then the radiator 40 and the drive board bracket 10 are fastened by screws.

[0203] To ensure the close contact between the radiator 40 and the IGBT 31 to ensure the heat dissipation effect, a fastener can pass through the radiator, the first screw installation portion 3112 of the IGBT 31 and the IGBT bracket 32 for connection.

[0204] In some embodiments, referring to Figure 30 and Figure 32 , a hexagonal nut 80 is embedded in the IGBT bracket 32, and the screw 70 is screwed with the nut 80.

[0205] A counterbore-type accommodating portion 323 is provided on the bottom wall of the second installation portion 321, and the nut 80 is installed in the accommodating portion 323. Specifically, the nut 80 can be embedded in the IGBT bracket 32 during the injection molding of the IGBT bracket 32, or the nut 80 can be inserted into the accommodating portion 323 in a split form.

[0206] The counterbore setting can ensure that only one side of the metal nut 80 facing the IGBT 31 is exposed, and other sides are wrapped in the plastic bracket, which can isolate the nut 80 from the drive substrate 20 and prevent the insulation distance between the nut 80 and the electrical components on the drive substrate 20 from being too close.

[0207] In this application, the metal nut can ensure the reliability of the threaded connection, provide sufficient pressing force between the IGBT 31 and the heat sink 40, and ensure the heat transfer effect from the IGBT 31 to the heat sink 40.

[0208] In some embodiments, since the metal base 312 of the IGBT 31 may be electrified in some cases, it is necessary to effectively insulate it from nearby metal parts to avoid potential safety hazards. Therefore, an insulating and heat-conducting gasket 50 can be provided between the heat sink 40 and the IGBT 31. The insulating and heat-conducting gasket 50 can insulate the heat sink 40 and the IGBT 31 and has heat conductivity, without affecting the heat transfer from the IGBT 31 to the heat sink 40 through the insulating and heat-conducting gasket 50.

[0209] During assembly, the insulating and heat-conducting gasket 50 can be selected to be attached to the IGBT 31. The insulating and heat-conducting gasket 50 completely covers the base 312 on the IGBT 31. For the convenience of installation and to ensure insulation, when viewed from the back, the insulating and heat-conducting gasket 50 completely covers the IGBT bracket 32. In other embodiments, the insulating and heat-conducting gasket 50 can be attached to the heat sink 40.

[0210] In this application, the base 312 of the IGBT 31 is insulated and isolated from the surface of the heat sink 40 by providing an insulating and heat-conducting gasket 50 between the IGBT 31 and the heat sink 40.

[0211] A plurality of second screw mounting parts 411 are provided on the heat sink base 41, and a plurality of third screw mounting parts 51 are provided on the insulating and heat-conducting gasket 50. The first screw mounting part 3112, the second screw mounting part 411, and the third screw mounting part 51 correspond to each other one by one, and the screw 70 sequentially passes through the second screw mounting part 411, the third screw mounting part 51, and the first screw mounting part 3112 to be connected to the IGBT bracket 32.

[0212] In some embodiments, referring to Figure 34 and Figure 35, the inner diameter of the third screw mounting portion 51 is not greater than that of the second screw mounting portion 411, which can ensure the sealing insulation at the interface of the mounting holes and improve the insulation performance. If the third screw mounting portion 51 of the insulating heat-conducting gasket 50 is smaller than the second screw mounting portion 411 on the radiator 40, the insulating heat-conducting gasket 50 does not completely cover the upper surface of the second screw mounting portion 411. Due to assembly errors or other reasons, the electricity on the base 312 is likely to be transmitted to the screw 70 from the gap at the interface. By setting the inner diameter of the third screw mounting portion 51 not greater than that of the second screw mounting portion 411, the insulating heat-conducting gasket 50 can completely cover the upper surface of the second screw mounting portion 411, ensuring the insulation at the interface of the mounting holes.

[0213] Similarly, the inner diameter of the third screw mounting portion 51 is not greater than that of the first screw mounting portion 3112, and the insulating heat-conducting gasket 50 can completely cover the lower surface of the first screw mounting portion 3112, ensuring the insulation at the interface of the mounting holes.

[0214] Alternatively, if the inner diameter of the third screw mounting portion 51 is not greater than the inner diameters of both the second screw mounting portion 411 and the first screw mounting portion 3112, the insulating heat-conducting gasket 50 can completely cover the interface of the mounting holes, ensuring insulation.

[0215] In some embodiments, referring to Figure 30 , an insulating ring group 60 is provided between the screw 70 and the radiator 40, that is, the insulating ring group 60 is inserted into the second screw mounting portion 411, and the screw 70 passes through the insulating ring group 60, the third screw mounting portion 51, the first screw mounting portion 3112 and is connected to the IGBT bracket 32.

[0216] The insulating ring group 60 is made of insulating plastic material. The insulating ring group 60 includes a spacer portion 61 and a convex ring portion 62. The spacer portion 61 is in a sheet shape, and the convex ring portion 62 is formed by protruding outward from the spacer portion 61, and the convex ring portion 62 is inserted into the second screw mounting portion 411 of the radiator 40.

[0217] The insulating ring group 60 can isolate and insulate the radiator 40 and the screw 70. The spacer portion 61 can isolate the radiator 40 and the screw head, and the convex ring portion 62 can isolate the screw column and the second screw mounting portion 411.

[0218] In some embodiments, referring to Figure 36 and Figure 37 , the inner diameter of the third screw mounting portion 51 of the insulating heat-conducting gasket 50 is not greater than the inner diameter of the convex ring portion 62. Thus, the insulating heat-conducting gasket 50 completely covers the upper surface of the insulating ring group 60, ensuring seamless sealed insulation at the interface of the mounting holes and improving the insulation performance.

[0219] According to an embodiment of the present application, a recess 412 is provided at one end of the radiator base 41 away from the IGBT 31. In the assembled state, the screw 70 is located within the recess 412. The screw 70 does not protrude from the radiator 40, which can ensure the flatness of the radiator 40.

[0220] In the present application, by providing a finned refrigerant radiator 120 for the drive board assembly 110 and a fan 130 within 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. Moreover, the fan 130 can promote the convective heat transfer between the air within the electrical box and the fins, conducting the heat absorbed by the air from the electrical components to the fins and then being taken away by the refrigerant, achieving the heat conduction and dissipation of the drive board assembly 110 and the air cooling of other heat-generating electrical components.

[0221] In the present 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 fan 130, the air within 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 the efficient heat dissipation of the closed electrical box.

[0222] In the present application, electrical components are respectively provided on both sides of the partition board, improving the space utilization rate within the electrical box and making the structure of the electrical box more compact and small.

[0223] In the present application, the drive board assembly with high heat generation, heat-generating electrical components, etc. are provided on the same side of the partition board 101, and the electrical components with low heat generation are provided on the other side of the partition board 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 within 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 reasonably changed.

[0224] In the present 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.

[0225] In the present application, by providing an inclined water guiding portion 149 on the bottom wall of the air hood 140 and a drain hole 146a at the lowest point of the water guiding portion 149, the condensed water on the refrigerant radiator 120 can flow out from the drain hole 146a along the water guiding portion 149.

[0226] In the present application, by providing a drain hole 146a on the air hood 140 and a water guiding plate 160 below the radiator body 121, after collecting the condensed water on the radiator body 121, the water guiding plate 160 guides the condensed water to the drain hole 146a and discharges it from the air hood 140, avoiding the condensed water generated by the refrigerant radiator 120 from spreading to the electrical components and causing a short circuit hazard.

[0227] In this application, the hole through which the refrigerant pipeline 122 passes through the air hood 140 is used as the drain hole 146a, and the condensed water flows out of the air hood 140 from the gap between the drain hole 146a and the refrigerant pipeline 122, which can simplify the structure and eliminate the need to additionally drill holes in the air hood 140; moreover, there are usually no electrical components at the position of the refrigerant pipeline 122 corresponding to the partition 101, which can avoid the safety impact of the condensed water on the electrical components.

[0228] In this application, by setting the bottom fins 1212 of the refrigerant radiator 120 in an upwardly warped structural form, the bottom fins 1212 have the function of collecting the condensed water from the upper fins.

[0229] In this application, a sealing cotton pad can be provided at the connection between the water guide plate 160 and the partition 101 to prevent the condensed water from leaking through the gap between the water guide plate 160 and the partition 101.

[0230] In this application, by providing a support plate 108 on the inner side of the box top cover 107 and a second top edge 1072 extending vertically at the front end of the box top cover 107, the top end of the box cover 106 is inserted between the support plate 108 and the second top edge 1072, and a sealing gasket is provided at the connection gap between the box cover 106 and the box top cover 107; the support plate 108 forms a forward limit on the box cover 106, causing the sealing gasket to be squeezed, thereby meeting the high protection and sealing requirements.

[0231] In this application, by setting the top of the box cover 106 in a C-shaped structure, the contact area between the box cover 106 and the box top cover 107 is increased, that is, the sealing area of the sealing gasket is increased, enhancing the sealing effect.

[0232] In this application, by providing a bottom hem 1064 extending horizontally forward at the bottom end of the box cover 106, the bottom hem 1064 of the box cover 106 abuts against the second bottom edge 1052, and the bottom hem 1064 forms an upward supporting force on the box cover 106, which can make the sealing gasket between the top end of the box cover 106 and the first top edge 1071 be tightened, ensuring the sealing effect between the top end of the box cover 106 and the box top cover 107.

[0233] In this application, by providing an IGBT bracket 32, multiple IGBTs 31 are positioned on the IGBT bracket 32, and the pins of the IGBT 31 are accurately positioned through the pin guiding holes on the IGBT bracket 32, ensuring the installation accuracy and support strength of multiple groups of IGBTs 31.

[0234] In this application, by embedding a metal nut 80 in the IGBT bracket 32, the metal nut 80 can ensure the reliability of threaded connection, provide sufficient pressing force between the IGBT 31 and the radiator 40, and ensure the heat transfer effect. Moreover, the embedded installation enables the nut 80 to be wrapped within the IGBT bracket 32 on all sides except the side facing the IGBT 31, ensuring the insulation between the metal nut and the electrical components on the drive substrate 20.

[0235] In this application, by providing an insulating and thermally conductive gasket 50 between the IGBT 31 and the radiator 40, the IGBT 31 and the radiator 40 can be insulated and isolated, preventing the electricity on the base 312 of the IGBT 31 from being transmitted to the radiator when it is charged, ensuring insulation and eliminating potential safety hazards.

[0236] In this application, by providing an insulating ring set 60 between the radiator 40 and the screw 70, the radiator 40 and the screw 70 can be insulated.

[0237] In this application, by ensuring that the third screw mounting portion 51 of the insulating and thermally conductive gasket 50 is not larger than the inner hole of the insulating ring set 60, seamless sealed insulation at the mounting hole interface can be guaranteed, improving the insulation performance.

[0238] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them. Although this 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 for some or all of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0239] 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 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, arranged inside the electrical box; Drive board assembly, connected to one side of the partition board; Refrigerant radiator, connected to the side of the partition board opposite to the drive board assembly, for dissipating heat from the drive board assembly; Air hood, covering the refrigerant radiator and connected to the partition board, an inclined water guiding part is arranged on the bottom wall of the air hood, and a drain hole is arranged on the water guiding part; The condensed water generated on the refrigerant radiator is discharged from the drain hole along the water guiding part.

2. The air conditioner according to claim 1, wherein, The water guiding part slopes downward in the direction away from the partition board.

3. The air conditioner according to claim 1, characterized in that, Further comprising: Target electrical component, arranged below the air hood; On the projection of the bottom wall of the air hood, the target electrical component does not intersect with the drain hole.

4. The air conditioner according to claim 1, characterized in that, Further comprising: Target electrical component, arranged below the air hood; On the projection of the partition board, the target electrical component does not intersect with the drain hole.

5. The air conditioner according to claim 1, characterized in that A horizontal flat plate part is further arranged on the bottom wall of the air hood, the flat plate part is close to the partition board, and the water guiding part extends from the flat plate part in the direction away from the partition board.

6. The air conditioner according to claim 5, wherein A first avoidance part is arranged on the partition board, and the module radiator of the drive board assembly penetrates through the first avoidance part; The lower edge of the first avoidance part is provided with a horizontally extending first positioning part, and the first positioning part is located below the module radiator; A gasket is arranged between the flat plate part and the first positioning part.

7. The air conditioner according to claim 1, characterized in that A vertical flanging part is further arranged at one end of the bottom wall of the air hood close to the partition board, and a gasket is arranged between the flanging part and the partition board.

8. The air conditioner according to claim 1, wherein The inclination angle of the water guiding part relative to the horizontal direction is 10 - 15°.

9. The air conditioner according to claim 1, characterized in that, Mounting ears are arranged on the bottom wall of the air hood, and the mounting ears are connected to the partition board through fasteners.

10. An air conditioner, characterized in that, Comprising: Electrical box; Partition board, arranged inside the electrical box; Drive board assembly, connected to one side of the partition board; Refrigerant radiator, connected to the side of the partition board opposite to the drive board assembly, for dissipating heat from the drive board assembly; Air hood, covering the refrigerant radiator and connected to the partition board, an inclined water guiding part is arranged on the bottom wall of the air hood, a drain hole is arranged on the water guiding part, and there is no electrical component vertically below the drain hole; The condensed water generated on the refrigerant radiator is discharged from the drain hole along the water guiding part.

Images