CN212660406U - Air conditioner indoor unit and electric box with external fan driving function - Google Patents

Abstract

The utility model discloses an interior machine of air conditioning and external driven electrical apparatus box of fan thereof, electrical apparatus box includes: the heat dissipation device comprises a main shell, a circuit board, a radiator, a cover body and a box body, wherein the box body comprises a main shell and a cover body, and the cover body covers the main shell; the circuit board is fixedly arranged in the main shell and comprises a main board body and an IPM module fixed on the main board body; one end of the radiator is connected with the IPM module, the other end of the radiator is connected with the cover body, and at least the cover body of the box body is a heat-conducting metal piece. According to the utility model discloses electrical apparatus box utilizes the lid for this characteristic of metal that has the heat conductivility, and the IPM module passes through the radiator and transmits the lid with the heat to with the thermal quick derivation of the power device of circuit board, utilize the shell heat dissipation that whole lid even lid and box body constitute, increase heat radiating area, the radiating effect is better.

Description

Air conditioner indoor unit and electric box with external fan driving function

Technical Field

The utility model belongs to the technical field of the air conditioner and specifically relates to an interior machine of air conditioning and external driven electrical apparatus box of fan thereof is related to.

Background

Because of the safety characteristic, the indoor unit of the air conditioner needs to adopt a metal sealed electrical box without a heat dissipation air duct. If the fan adopts an external driving scheme, the cost can be reduced, but the fan IPM module faces the problem of overhigh temperature rise and directly influences the safety performance of an air conditioner internal unit.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide an electric box with an external fan driving for an indoor unit of an air conditioner.

According to the utility model discloses external driven electrical apparatus box of fan of machine in air conditioning includes: the heat dissipation device comprises a main shell, a circuit board, a radiator, a cover body and a box body, wherein the box body comprises a main shell and a cover body, and the cover body covers the main shell; the circuit board is fixedly arranged in the main shell and comprises a main board body and an IPM module fixed on the main board body; one end of the radiator is connected with the IPM module, the other end of the radiator is connected with the cover body, and at least the cover body of the box body is a heat-conducting metal piece.

According to the utility model discloses electrical apparatus box utilizes the lid for this characteristic of metal that has the heat conductivility, and the IPM module passes through the radiator and transmits the lid with the heat to with the thermal quick derivation of the power device of circuit board, utilize the shell heat dissipation that whole lid even lid and box body constitute, increase heat radiating area, the radiating effect is better.

In some embodiments, the heat sink includes a main heat sink and a sub heat sink, and the circuit board and the heat sink are connected by screws sequentially passing through the main board body, the IPM module, the main heat sink, the sub heat sink, and the cover.

In some embodiments, the primary heat sink is a finned heat sink.

In some embodiments, the primary heat sink includes two end plates and a plurality of fins connected between the two end plates, the plurality of fins being disposed parallel to and spaced apart from each other, one of the end plates being attached to the secondary heat sink, and the other end plate being opposite to the IPM module.

In some embodiments, the primary heat sink is a heat pipe heat sink.

In some embodiments, the main heat sink includes two side plates, a plurality of heat dissipation plates and at least one heat pipe, the plurality of heat dissipation plates are located between the two side plates, the plurality of heat dissipation plates are parallel to each other and are spaced apart from each other, and the heat pipe sequentially and vertically penetrates through the plurality of heat dissipation plates and two ends of the heat pipe respectively extend into the limiting grooves of the two side plates. In some embodiments, the secondary heat sink is pad-like. The auxiliary radiator is clamped with the inner wall of the cover body.

In some embodiments, phase-changeable silicone gaskets are disposed between the main heat sink and the IPM module, between the main heat sink and the sub heat sink, and between the sub heat sink and the cover.

In some embodiments, the cover is made of aluminum alloy.

According to the utility model discloses indoor set of air conditioner of second aspect embodiment, include the electrical apparatus box.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic three-dimensional split view of an electrical box according to an embodiment of the present invention.

Fig. 2 is a partial disassembly schematic diagram of an electrical box according to the embodiment of the present invention.

Fig. 3 is another schematic perspective split view of the electrical box according to the embodiment of the present invention.

Fig. 4 is a schematic view of a main heat sink of an appliance box according to an embodiment of the present invention.

Fig. 5 is a schematic view of a main heat sink of an appliance box according to another embodiment of the present invention.

Fig. 6 is another schematic view of a main heat sink of an appliance box according to another embodiment of the present invention.

Reference numerals:

the electrical box (100) is provided with a plurality of electrical boxes,

a box body 10, a main shell 11, a cover body 12,

a circuit board 20, a main board body 21, an IPM module 22,

the radiator 30, the main radiator 31, the end plates 311a and 311b, the fins 312, the side plates 313a and 313b, the limiting grooves 314, the heat dissipation plate 315, the heat pipe 316 and the auxiliary radiator 32.

Detailed Description

Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.

An electric box 100 for an external fan drive of an indoor unit of an air conditioner according to an embodiment of the present invention will be described with reference to fig. 1 to 6.

As shown in fig. 1, the electrical box 100 driven by the external fan of the indoor unit of the air conditioner according to the embodiment of the present invention includes: main casing 11, circuit board 20, heat sink 30, lid 12.

As shown in fig. 2, the case 10 includes a main housing 11 and a cover 12, and the cover 12 covers the main housing 11; the circuit board 20 is fixedly arranged in the main housing 11, and the circuit board 20 includes a main board body 21 and an IPM module 22 fixed on the main board body 21; one end of the heat sink 30 is connected to the IPM module 22, the other end of the heat sink 30 is connected to the cover 12, and at least the cover 12 of the case 10 is a heat-conducting metal member.

That is, only cover 12 may be made of a metal having thermal conductivity, both cover 12 and case 11 may be made of a metal having thermal conductivity, and the materials of both may be the same or different.

It is understood that ipm (intelligent Power module), i.e. the intelligent Power module, not only integrates the Power switch device and the driving circuit. In addition, a fault detection circuit for overvoltage, overcurrent, overheat, etc. is built in and a detection signal is sent to the CPU. The high-speed low-power-consumption transistor consists of a high-speed low-power-consumption transistor core, an optimized gate driving circuit and a quick protection circuit. Even if a load accident or misuse occurs, it is possible to ensure that the IPM module itself is not damaged. IPM generally uses an IGBT as a power switching element, and has an integrated structure in which a current sensor and a drive circuit are incorporated. The IPM gains a bigger and bigger market due to high reliability and convenient use, is particularly suitable for a frequency converter of a driving motor and various inverter power supplies, and is an ideal power electronic device for variable frequency speed regulation, metallurgical machinery, electric traction, servo drive and variable frequency household appliances.

According to utility model discloses electrical apparatus box 100, utilize lid 12 for this characteristic of metal that has the heat conductivility, IPM module 22 passes through radiator 30 with heat transfer to lid 12 to with the quick derivation of the heat of circuit board 20's power device, utilize whole lid 12 even the shell heat dissipation that lid 12 and box body 10 constitute, increase heat radiating area, the radiating effect is better.

In some embodiments, referring to fig. 3, the heat sink 30 includes a main heat sink 31 and a sub heat sink 32, and the circuit board 20 and the heat sink 30 are connected by screws (not shown) passing through the main board body 21, the IPM module 22, the main heat sink 31, the sub heat sink 32, and the cover 12 in sequence. Like this, because the apron is the metal that is softer, easy emergence is out of shape, the contact is uneven, through setting up vice radiator 32, has not only avoided main radiator 31 directly to support lid 12 that the contact caused and warp with the apron, utilizes the screw to assemble main radiator 31, vice radiator 32, circuit board 20, apron together moreover, not only easy dismounting, and the commonality is good.

In the particular embodiment shown in fig. 4, the primary heat sink 31 is a finned heat sink 30. Therefore, the main radiator 31 adopts the finned radiator 30, and has simple structure and low cost.

Further, the main heat sink 31 includes two end plates 311a and 311b and a plurality of fins 312 connected between the two end plates 311a and 311b, the plurality of fins 312 are disposed in parallel and spaced apart from each other, one end plate 311a is attached to the sub-heat sink 32, and the other end plate 311b is opposite to the IPM module 22. Accordingly, the end plates 311a and 311b are easily installed and screws can be easily inserted, and the gaps between the plurality of fins 312 allow air flow in the main case 11 and the cover 12 to flow therethrough, thereby improving the heat dissipation efficiency of the IPM module 22.

In the embodiment shown in fig. 5, the main radiator 31 is a heat pipe radiator 30. Therefore, when the actual working condition is severe, the heat pipe type radiator 30 is adopted, and the heat dissipation effect is better.

Referring to fig. 6, the main heat sink 31 includes two side plates 313a and 313b, a plurality of heat dissipation plates 315 and at least one heat pipe 316, the plurality of heat dissipation plates 315 are disposed between the two side plates 313a and 313b, the plurality of heat dissipation plates 315 are disposed in parallel and spaced apart from each other, the heat pipe 316 sequentially passes through the plurality of heat dissipation plates 315 vertically, and both ends of the heat pipe 316 respectively extend into the limiting grooves 314 of the two side plates 313a and 313 b. Therefore, the heat dissipation plate 315 and the heat pipe 316 are combined, so that the heat dissipation effect of the main heat sink 31 can be further improved, and the main heat sink 31 can be cooled in time and quickly under the severe working conditions.

In some embodiments, the secondary heat sink 32 is pad-like. The sub-radiator 32 is engaged with the inner wall of the cover 12. Therefore, the auxiliary radiator 32 is roughly positioned on the inner wall of the cover body 12 in a clamping mode, and can be directly detached and replaced when the auxiliary radiator 32 is abraded, so that the device is convenient and fast to use.

Optionally, phase-changeable silicone gaskets are disposed between the main radiator 31 and the IPM module 22, between the main radiator 31 and the sub-radiator 32, and between the sub-radiator 32 and the cover 12. The silica gel gasket that can change phase is the solid when the equipment to increase the laminating nature of contact surface, turn into liquid after being heated, do benefit to heat conduction.

That is to say, the circuit board 20 may be disposed at the inner bottom of the main housing 11 through a bracket, the fan IPM module 22 on the circuit board 20 is tightly connected to the surface of the heat sink 30 through a screw, and a silica gel gasket with phase change property is used as a medium in the middle, so that the contact surface has better adhesion and better thermal conductivity. The faces of the electrical box 100 cover, the heat sink 30 and the heat sink 30 are tightly connected together by screws, wherein a silica gel gasket with phase change property is placed between every two parts to increase the fitting degree of the contact faces.

In some embodiments, the cover 12 is made of aluminum alloy. Therefore, the radiator 30 is in full contact with the cover body 12 made of the aluminum alloy material, the heat conduction efficiency is higher, and the heat dissipation effect is better.

According to the second aspect of the present invention, the indoor unit of an air conditioner includes the electrical box 100 of the above embodiment. Therefore, by adopting the electrical box 100 of the above embodiment, the heat dissipation problem of the IPM module 22 of the external driving scheme of the indoor unit fan is solved.

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

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

The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.

The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.

The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features. In the description of the present invention, "a plurality" means two or more. In the description of the present invention, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween. In the description of the invention, the first feature being "on", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. The utility model provides an external driven electrical apparatus box of fan of machine in air conditioning which characterized in that includes:

the box body comprises a main shell and a cover body, and the cover body covers the main shell;

the circuit board is fixedly arranged in the main shell and comprises a main board body and an IPM module fixed on the main board body;

one end of the radiator is connected with the IPM module, the other end of the radiator is connected with the cover body, and at least the cover body of the box body is a heat-conducting metal piece.

2. The electrical box according to claim 1, wherein the heat sink comprises a main heat sink and a sub heat sink, and the circuit board is connected to the heat sink by screws sequentially passing through the main board body, the IPM module, the main heat sink, the sub heat sink, and the cover.

3. The electrical box of claim 2, wherein the primary heat sink is a finned heat sink.

4. The electronics box of claim 3, wherein the primary heat sink comprises two end plates and a plurality of fins connected between the two end plates, the plurality of fins being disposed parallel to and spaced apart from each other, one of the end plates being attached to the secondary heat sink and the other end plate being opposite the IPM module.

5. The appliance box according to claim 2, wherein the main heat sink is a heat pipe heat sink.

6. The electrical box according to claim 5, wherein the main heat sink comprises two side plates, a plurality of heat dissipation plates and at least one heat pipe, the plurality of heat dissipation plates are disposed between the two side plates, the plurality of heat dissipation plates are parallel to each other and spaced apart from each other, the heat pipe sequentially and vertically penetrates through the plurality of heat dissipation plates, and two ends of the heat pipe respectively extend into the limiting grooves of the two side plates.

7. The electrical box according to any one of claims 2 to 6, wherein the secondary heat sink is in the form of a pad, and the secondary heat sink is engaged with the inner wall of the cover.

8. The electrical box according to any of claims 2 to 6, wherein phase-changeable silicone gaskets are arranged between the main heat sink and the IPM module, between the main heat sink and the sub heat sink, and between the sub heat sink and the cover.

9. The electrical box according to any one of claims 2 to 6, wherein the cover is made of an aluminum alloy.

10. An air-conditioning indoor unit, characterized by comprising an appliance casing according to any one of claims 1 to 9.

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