Heat dissipation structure of electric appliance box of air conditioner

By designing a heat dissipation structure that separates the internal space in the air conditioner electrical box, combined with the DC brushless adjustable speed fan and ventilation hole design, the problem of difficult component temperature reduction and noise in the existing technology is solved, and all-round heat dissipation and noise are achieved Reduced effect.

CN222278823UActive Publication Date: 2024-12-31ZHEJIANG OULUN ELECTRIC
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Patent Information

Application Number
CN202420008791.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-01-02
Publication Date
2024-12-31
Estimated Expiration
2034-01-02

AI Technical Summary

Technical Problem

The existing air conditioner heat dissipation solution is difficult to effectively reduce the temperature of all components on the variable frequency control board, especially components that cannot be installed under the radiator, such as the inductor and capacitor of the PFC, and the high speed of traditional axial fans leads to noise problems.

Method used

Design a heat dissipation structure of an air conditioner electrical box, using the case and the upper air duct shell to separate the internal space, and set up indoor and outdoor air conditioning systems. A centrifugal blower fan is installed above the radiator. The fan is a DC brushless adjustable speed motor. With ball bearings and speed is controlled by PWM speed, window-type ventilation holes and exhaust holes are added to the lid of the electrical box to form a hot and cold air circulation to reduce the temperature.

Benefits of technology

It realizes effective heat dissipation of all devices in the entire electrical box, extends the life cycle of the variable frequency control board, reduces noise, and reduces the temperature rise of components and the noise of the whole machine through the adjustable speed fan and ventilation hole design.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model particularly discloses a heat dissipation structure of an air conditioner electric appliance box, which comprises a machine shell, an upper air duct shell and a lower air duct shell, the outdoor air-conditioning system comprises a condenser, a fan system and an electric appliance box, a variable-frequency control panel and a radiator are arranged in the electric appliance box, a blower fan is arranged on one side of the radiator, the radiator is arranged above the radiator of the variable-frequency control panel, a centrifugal blower fan is mounted below the radiator, and a motor of the blower fan is a direct-current brushless motor which is long in service life and stable in rotating speed. In order to further enhance the reliability, the motor adopts a ball bearing, the motor has rotating speed feedback and PWM (Pulse Width Modulation) speed control, the rotating speed is controllable, and the motor can run according to different rotating speeds under different conditions; the air volume is large, the air blowing distance is long, an air duct does not need to be additionally arranged, the frequency conversion control board is an integrated board, part of electronic components can be saved, only one power source component is needed, and cost can be greatly reduced.
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Description

Technical Field

[0001] The present application relates to the technical field of air conditioning heat dissipation, and in particular to a heat dissipation structure of an air conditioner electrical box. Background Art

[0002] Many components on the variable frequency control board of the variable frequency air conditioner are heat-generating devices, so the temperature needs to be lowered to work normally. There are many forms of heat dissipation solutions on the market now, and there are more or less some problems. The heat dissipation method currently used in the market is to place the radiator on the back and take away the heat from the radiator through the residual wind of the condensing fan. However, this method can only dissipate the heat of some components under the radiator. Some components cannot be installed under the radiator, so heat dissipation cannot be achieved, such as PFC inductors and capacitors and other heat-generating devices.

[0003] There is also a way to dissipate heat by installing an axial fan. The axial fan is installed on the top of the radiator and dissipates heat by blowing air to the radiator. The residual wind of the blower fan can also appropriately reduce the heat of other components on the frequency conversion control board. However, this cooling method requires a very high speed of the blower fan, and the speed cannot be adjusted, which causes a certain amount of noise, greatly reducing the consumer's usage experience.

[0004] The present application mentions an air conditioning heat dissipation solution for a variable frequency control panel, which is simple, convenient and practical, especially for an all-in-one product where the whole machine is placed indoors. Summary of the invention

[0005] In order to solve at least one technical problem existing in the background technology, the utility model enables all devices in the entire electrical box to dissipate heat, ensuring that all components operate at a lower temperature, thereby extending the life cycle of the entire frequency conversion control board.

[0006] The present application provides a heat dissipation structure of an air conditioner electrical box, comprising:

[0007] chassis;

[0008] The upper air duct housing divides the internal space of the housing into an indoor cavity and an outdoor cavity; the indoor air conditioning system is arranged in the indoor cavity, and the indoor cavity is provided with an indoor air inlet and an indoor air outlet;

[0009] An outdoor air-conditioning system is arranged in the outdoor cavity. The outdoor cavity is provided with an outdoor air inlet and an outdoor air outlet. The outdoor air-conditioning system includes a condenser, a fan system and an electrical box. The fan system is arranged at the outdoor air outlet. A frequency conversion control board and a radiator are arranged in the electrical box. A blower fan is arranged on one side of the radiator.

[0010] Preferably, the frequency conversion control board is integrated with a drive board and a main control board, and the drive board and the main control board are connected to the same power supply and positive and negative poles.

[0011] Preferably, the blower fan is a centrifugal blower fan, the blower fan is located below the radiator, and the blower fan includes an air inlet and an air outlet.

[0012] Preferably, the radiator comprises a plurality of heat sinks arranged in parallel, and the orientation of each heat sink is parallel to the air outlet.

[0013] Preferably, the blower fan is a brushless DC adjustable speed fan, and a ball bearing is provided on the motor of the blower fan.

[0014] Preferably, the motor of the blower fan transmits the rotation speed to the frequency conversion control board, and the frequency conversion control board controls the motor speed of the blower fan through PWM speed. Under different working conditions, the motor runs at the set speed.

[0015] Preferably, the electrical appliance box comprises an electrical appliance box frame and an electrical appliance box cover, and the electrical appliance box frame and the electrical appliance box cover are fixedly connected by screws.

[0016] Preferably, a plurality of window-type ventilation holes are provided on the outer wall of the electrical box cover.

[0017] Preferably, the air inlet of each window-type vent faces downward, and the air outlet of each window-type vent faces the air inlet of the blower fan.

[0018] Preferably, a plurality of exhaust holes are provided on the outer wall of the electrical box cover.

[0019] The beneficial effects brought by the present invention are:

[0020] First, the heat sink of the frequency conversion control board is equipped with a radiator on the top and a centrifugal blower fan is installed on the bottom. The motor of this blower fan is a brushless DC motor. The motor of the blower fan has a long life, stable speed and low noise. In order to further enhance its reliability, the motor adopts ball bearings, the motor has speed feedback, and has PWM speed control, that is, the speed is controllable, and it can run at different speeds under different conditions;

[0021] Secondly, the blower fan of the present application has a large air volume and a long blowing distance, and no additional air duct is required. The frequency conversion control board is an integrated board, and some electronic components can be saved. After the integrated board, only one power supply component is required, which can greatly reduce the cost;

[0022] The structure is compact, and the heat dissipation components are relatively concentrated. The blower fan can easily blow air to various components, so the temperature rise of each component is relatively low and the life of the components is prolonged. At the same time, window-type ventilation holes are added to the cover of the electrical box. When viewed from the outside, the window is downward and outward, and the center of the window is opposite to the air inlet of the blower fan. When the blower fan is running, it can absorb colder air outside the electrical box into the electrical box.

[0023] Secondly, there are some exhaust holes in the middle and upper part of the electrical box. The air blown up from the bottom of the electrical box by the blower fan passes through these small holes to the outside of the electrical box. In this way, the cold air outside the electrical box is converted into hot air inside the electrical box and then blown to the outside of the electrical box and blown out to the outside, forming a cycle, thereby reducing the temperature of all components on the frequency conversion control board.

[0024] These features and advantages of the present invention will be disclosed in detail in the following specific implementation manners and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present application are used to provide a further understanding of the present application, so that other features, purposes and characteristics of the present application become more obvious. The illustrative embodiment drawings and their descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application.

[0026] Figure 1 This is a schematic diagram of the overall structure of an air conditioner provided in one embodiment of the present application.

[0027] Figure 2 A schematic diagram of the back structure of an air conditioner provided in one embodiment of the present application.

[0028] Figure 3 This is a schematic diagram of the interior of an air conditioner provided in one embodiment of the present application.

[0029] Figure 4 A schematic diagram of the structure of an electrical box frame of an electrical box provided in one embodiment of the present application.

[0030] Figure 5 A schematic structural diagram of an electrical box cover of an electrical box provided in one embodiment of the present application.

[0031] In the figure: casing 1; indoor air inlet 2; indoor air outlet 3; upper air duct casing 4; outdoor air inlet 5; outdoor air outlet 6; outdoor air conditioning system 7; condenser 71; fan system 72; electrical box 8; electrical box frame 81; electrical box cover 82; exhaust hole 820; control panel 9; radiator 10; blower fan 11; air inlet 111; air outlet 112. DETAILED DESCRIPTION

[0032] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Embodiment 1, as Figure 1-5 As shown:

[0037] The utility model discloses a heat dissipation structure of an electrical box of an air conditioner, which has the following technical features.

[0038] like Figure 1 Shown: A heat dissipation structure of an air conditioner electrical box, comprising:

[0039] A housing 1, the upper portion of which is provided with an indoor air inlet 2 and an indoor air outlet 3;

[0040] like Figure 2As shown: the outdoor air-conditioning system 7 is arranged in the outdoor cavity 200, and the outdoor cavity 200 is provided with an outdoor air inlet 5 and an outdoor air outlet 6. The outdoor air-conditioning system includes a condenser 71, a fan system 72 and an electrical box 8. The fan system is arranged at the outdoor air outlet 6. The electrical box 8 is provided with a frequency conversion control board 9 and a radiator 10. A blower fan 11 is provided on one side of the radiator 10.

[0041] like Figure 3 As shown: the upper air duct housing 4 divides the internal space of the housing 1 into an indoor cavity 100 and an outdoor cavity 200; the indoor air conditioning system is arranged in the indoor cavity 100, and the indoor cavity 100 is provided with an indoor air inlet 2 and an indoor air outlet 3;

[0042] like Figure 4 As shown: the frequency conversion control board 9 is integrated with the drive board and the main control board, and the drive board and the main control board are connected to the same power supply and positive and negative lines. The frequency conversion control board 9 is an integrated board, which is installed in the electrical box 8, with the main heating device at the bottom, and a radiator 10 is installed above the heat dissipation device, and a centrifugal blower fan 11 is installed below.

[0043] The frequency conversion control board 9 is an integrated board, and some electronic components can be saved. The main board of the split frequency conversion control board needs a power supply component, and the drive board also needs a power supply component. The integrated board only needs one power supply component, which can greatly reduce the cost.

[0044] The structure is compact, and the heat dissipation components are relatively concentrated. The blower fan can easily blow air to various components, so the temperature rise of each component is relatively low and the life of the components is prolonged. At the same time, window-type ventilation holes are added to the cover of the electrical box. When viewed from the outside, the window is downward and outward, and the center of the window is opposite to the air inlet of the blower fan. When the blower fan is running, it can absorb colder air outside the electrical box into the electrical box.

[0045] The blower fan 11 is a centrifugal blower fan, and the blower fan 11 is located below the radiator 10. The blower fan 11 is located below the radiator 10, and the blower fan 11 includes an air inlet 111 and an air outlet 112. Secondly, the fan of the present application has a large air volume and a long blowing distance, and no additional air duct is required.

[0046] The radiator 10 includes a plurality of radiating fins 101 arranged in parallel, and the orientation of each radiating fin 101 is parallel to the air outlet 112 .

[0047] The blower fan 11 is a brushless DC speed-adjustable blower, and a ball bearing is provided on the motor of the blower fan 11 .

[0048] The motor of the blower fan 11 transmits the rotation speed to the frequency conversion control board 9, and the frequency conversion control board 9 controls the motor rotation speed of the blower fan 11 through PWM speed. Under different working conditions, the motor runs at the set rotation speed. The heat sink of the frequency conversion control board has a radiator on the top, and a centrifugal blower fan is installed on the bottom. The motor of this blower fan is a DC brushless motor, which has a long life, stable rotation speed, and low noise. To further enhance its reliability, the motor adopts a ball bearing. This motor has rotation speed feedback and PWM speed control, that is, the rotation speed is controllable, and it can be made to run at different rotation speeds under different conditions.

[0049] like Figure 4-5 As shown: the electrical box 8 comprises an electrical box frame 81 and an electrical box cover 82, and the electrical box frame 81 and the electrical box cover 82 are fixedly connected by screws.

[0050] A plurality of window-type ventilation holes 80 are provided on the outer wall of the electrical box cover 82 .

[0051] The air inlet of each window-type vent 80 faces downward, and the air outlet of each window-type vent 80 faces the air inlet of the air blower fan.

[0052] A plurality of exhaust holes 820 are also provided on the outer wall of the electrical box cover 82. Again, some exhaust holes 820 are opened in the middle and upper part of the electrical box. The wind blown up from the bottom of the electrical box by the blower fan 11 passes through these small holes to the outside of the electrical box 8. In this way, the cold wind outside the electrical box is converted into hot air inside the electrical box and then blown to the outside of the electrical box 8 and blown out to the outside, forming a cycle, thereby reducing the temperature of all components on the frequency conversion control board.

[0053] Finally, the blower fan in the present application has FG feedback on its speed, so the frequency conversion control board knows its speed at all times. Because this motor can be PWM-controlled, the frequency conversion control board can adjust its speed in real time according to its status. For example, when the compressor frequency is high or the ambient temperature is high, the temperature rise of the components is high. In this case, the PWM duty cycle is increased to increase the blower fan speed, increase the heat dissipation air volume, and reduce the temperature of the components. When the compressor frequency is low or the ambient temperature is low, the PWM duty cycle of the blower fan speed regulation is reduced, thereby reducing the blower fan speed. At this time, the heat exchange amount can be reduced, thereby reducing the noise of the whole machine, especially when the compressor frequency is reduced, because the operating noise of the whole machine is greatly reduced. If the blower fan speed is not reduced, the blower fan noise will be more obvious, and the customer's usage experience will be greatly reduced.

[0054] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A heat dissipation structure of an air conditioner electrical box, characterized in that: include: Housing (1); An upper air duct housing (4) divides the internal space of the housing (1) into an indoor cavity (100) and an outdoor cavity (200); an indoor air conditioning system is arranged in the indoor cavity (100), and an indoor air inlet (2) and an indoor air outlet (3) are arranged on the indoor cavity (100); An outdoor air conditioning system (7) is arranged in the outdoor cavity (200), and the outdoor cavity (200) is provided with an outdoor air inlet (5) and an outdoor air outlet (6). The outdoor air conditioning system comprises a condenser (71), a fan system (72) and an electrical box (8), wherein the fan system is arranged at the outdoor air outlet (6), and the electrical box (8) is provided with a frequency conversion control panel (9) and a radiator (10), and a blower fan (11) is provided on one side of the radiator (10).

2. The heat dissipation structure of the air conditioner electrical box according to claim 1, characterized in that: The frequency conversion control board (9) is integrated with a drive board and a main control board, and the drive board and the main control board are connected to the same power supply and positive and negative pole lines.

3. The heat dissipation structure of the air conditioner electrical box according to claim 1, characterized in that: The blast fan (11) is a centrifugal blast fan. The blast fan (11) is located below the radiator (10). The blast fan (11) comprises an air inlet (111) and an air outlet (112).

4. The heat dissipation structure of the air conditioner electrical box according to claim 2, characterized in that: The radiator (10) comprises a plurality of radiating fins (101) arranged in parallel, and the orientation of each radiating fin (101) is kept parallel to the air outlet (112).

5. The heat dissipation structure of the air conditioner electrical box according to claim 4, characterized in that: The blast fan (11) is a DC brushless speed-adjustable fan, and a ball bearing is provided on the motor of the blast fan (11).

6. The heat dissipation structure of the air conditioner electrical box according to claim 3, characterized in that: The motor of the blast fan (11) transmits the rotation speed to the frequency conversion control board (9), and the frequency conversion control board (9) controls the motor rotation speed of the blast fan (11) through PWM speed. Under different working conditions, the motor runs at the set rotation speed.

7. The heat dissipation structure of the air conditioner electrical box according to claim 2, characterized in that: The electrical appliance box (8) comprises an electrical appliance box frame (81) and an electrical appliance box cover (82), and the electrical appliance box frame (81) and the electrical appliance box cover (82) are fixedly connected by screws.

8. The heat dissipation structure of the air conditioner electrical box according to claim 7, characterized in that: A plurality of window-type ventilation holes (80) are provided on the outer wall of the electrical box cover (82).

9. The heat dissipation structure of the air conditioner electrical box according to claim 8, characterized in that The air inlet of each window-type ventilation hole (80) faces downward, and the air outlet of each window-type ventilation hole (80) faces the air inlet (111) of the air blowing fan.

10. The heat dissipation structure of the air conditioner electrical box according to claim 7, characterized in that: A plurality of exhaust holes (820) are also provided on the outer wall of the electrical box cover (82).