WO2019114311A1

WO2019114311A1 - Air conditioner and electric box thereof

Info

Publication number: WO2019114311A1
Application number: PCT/CN2018/101044
Authority: WO
Inventors: 廖敏; 陈英强; 吴俊鸿; 于博; 翟振坤
Original assignee: 格力电器（武汉）有限公司; 珠海格力电器股份有限公司
Priority date: 2017-12-15
Filing date: 2018-08-17
Publication date: 2019-06-20
Also published as: CN107906705A; CN107906705B

Abstract

An air conditioner and an electric box thereof. The electric box comprises: an electric box body in a closed structure; a fan (2) provided inside the electric box body; and a heat conducting component having a heat absorbing portion located inside the electric box body and a heat dissipating portion located outside the electric box body. Air in the electric box body is disturbed by the fan (2), and after the air absorbs heat of a heat dissipating elements in the electric box, the heat absorbing portion of the heat conducting component exchanges heat with the air disturbed in the electric box body, and transfers the heat to the heat dissipating portion for heat dissipation. The electric box body is a closed structure, so that the heat dissipation effect of the elements in the electric box is ensured and the service life thereof is prolonged.

Description

Air conditioner and its electrical box

Technical field

The invention relates to the technical field of air conditioners, and in particular to an air conditioner and an electrical box thereof.

Background technique

With the development of air-conditioning technology, air-conditioning equipment is constantly breaking through the cooling and heating technology in the extreme environment. In order to ensure the stable operation of the electrical box of the air conditioner, it is necessary to cool the internal components to ensure the reliable operation of the air conditioner.

The internal heat dissipation of the electrical box is mainly through the design of the ventilation duct on the box of the electrical box, so that the outside air enters the inside of the electrical box, and the temperature of the surface of the component is lowered by air convection.

However, due to the provision of ventilation ducts, impurities such as external water vapor and dust can easily enter the interior of the electrical box through the air duct, causing problems such as corrosion of components and short circuits, affecting the service life of the electrical box; and small animals such as pests and rats are also possible. Through the air duct into the electrical box, the internal structure of the electrical box is destroyed, which also affects the service life of the electrical box. In the long-term use process, the problem of air duct blockage is prone to occur, and the components inside the electrical box cannot be cooled by air convection, which causes overheating damage of the components, thereby affecting the stable operation of the electrical box.

Therefore, how to avoid overheating damage of components, improve the service life of the electrical box, and ensure the stable operation of the electrical box are problems that need to be solved by those skilled in the art.

Summary of the invention

In view of this, the present invention provides an electrical box to avoid overheating damage of components, improve the service life of the electrical box, and ensure stable operation of the electrical box. The invention also discloses an air conditioner having the above electrical box.

To achieve the above object, the present invention provides the following technical solutions:

An electrical box comprising:

a closed structure electrical box body;

a fan disposed in the main body of the electrical box;

a heat conductive member having a heat absorbing portion inside the electrical box body and a heat radiating portion located outside the power box body.

Preferably, in the above electrical box, the fan is provided with a mounting foot;

The mounting leg is coupled to an inner wall of the electrical box body, and an air intake space is formed between the fan and an inner wall of the electrical box body.

Preferably, in the above electrical box, the air blowing surface of the fan faces the heat dissipating component on the PCB board of the electrical box.

Preferably, in the above electrical box, the heat conducting member has a "U"-shaped structure, one end of the "U"-shaped structure is the heat absorbing portion, and the other end of the "U"-shaped structure is the heat absorbing portion. section;

The PCB board of the electrical box is located in a recess of the heat conducting component.

Preferably, in the above electrical box, the heat conducting component is a heat pipe radiator;

The heat pipe heat sink includes a heat pipe, the heat absorbing portion includes a first heat pipe portion of the heat pipe located inside the electrical box body, and the heat radiating portion includes a second heat pipe portion of the heat pipe outside the electrical box body .

Preferably, in the above electrical box, the heat absorbing portion further comprises a heat absorbing fin structure in heat exchange contact with the first heat pipe portion.

Preferably, in the above electrical box, the heat absorbing fin structure comprises a heat absorbing substrate and a heat absorbing rib;

The heat absorbing fin is disposed on a side of the heat absorbing substrate away from the PCB of the electrical box.

Preferably, in the above electrical box, the PCB board of the electrical box is disposed with a heat dissipating component toward one side of the heat absorbing portion;

The heat absorbing substrate is in heat exchange contact with the heat dissipating component.

Preferably, in the above electrical box, the first heat pipe portion is in heat exchange contact with the heat absorbing substrate.

Preferably, in the above electrical box, the thickness of the heat absorbing substrate ranges from 3 mm to 20 mm;

And/or, the spacing between two adjacent heat absorbing fins ranges from 5 mm to 30 mm.

Preferably, in the above electrical box, the heat dissipating portion further includes a heat dissipating fin structure in heat exchange contact with the second heat pipe portion.

Preferably, in the above electrical box, the heat dissipation fin structure comprises a heat dissipation substrate and a heat dissipation fin;

The heat dissipation fins are disposed on a side of the heat dissipation substrate away from the PCB of the electrical box.

Preferably, in the above electrical box, the second heat pipe portion is in heat exchange contact with the heat dissipation fins.

Preferably, in the above electrical box, the thickness of the heat dissipation substrate ranges from 3 mm to 20 mm;

And/or, the spacing between two adjacent heat dissipation fins ranges from 5 mm to 30 mm.

Preferably, in the above electrical box, the heat dissipating component on the PCB board of the electrical box is in heat exchange contact with the heat dissipating portion.

Preferably, in the above electrical box, the electrical box body comprises a lid and a box;

The box body is provided with an opening structure for avoiding the heat dissipating portion, and the PCB board of the electrical box encloses the opening structure.

The present invention also provides an outdoor unit for an air conditioner, comprising an electrical box, the electrical box being the electrical box according to any of the above

Preferably, in the above air conditioner outdoor unit, the heat radiating portion of the electric box is disposed corresponding to the fan of the air conditioner outdoor unit.

It can be seen from the above technical solution that the electrical box provided by the present invention disturbs the air inside the main body of the electrical box by the fan, and the air absorbs the heat of the heat dissipating component in the electrical box, and then uses the heat conduction characteristic of the heat conducting component to make the heat conducting component The heat absorbing portion exchanges heat with the disturbed air in the main body of the electrical box, and transfers the heat to the heat radiating portion of the heat conducting member outside the main body of the electrical box for heat dissipation. By setting the main body of the electrical box to a closed structure, impurities such as outside water vapor, dust or small animals such as pests and rats are effectively prevented from entering the inside of the electrical box, ensuring the heat dissipation effect of the components in the electrical box, and avoiding overheating damage of the components, effectively improving the efficiency. The service life of the electrical box ensures the stable operation of the electrical box.

The embodiment of the invention further provides an air conditioner, which comprises an electrical box, and the electrical box is any one of the above electrical boxes. Since the above electrical box has the above technical effects, the air conditioner having the above electrical box should also have the same technical effect, and will not be repeatedly described herein.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic exploded view of an electrical box according to an embodiment of the present invention;

2 is a schematic structural diagram of a cover and a fan according to an embodiment of the present invention;

3 is a first cross-sectional structural view of an electrical box according to an embodiment of the present invention;

4 is a second cross-sectional structural view of an electrical box according to an embodiment of the present invention;

FIG. 5 is a schematic front structural view of a heat conducting component according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic perspective structural view of a heat conducting component according to an embodiment of the present invention; FIG.

FIG. 7 is a schematic bottom view of a heat conducting component according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic top plan view of a heat conducting component according to an embodiment of the present invention.

Detailed ways

It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.

It is to be noted that the terminology used herein is for the purpose of describing particular embodiments and is not intended to As used herein, the singular " " " " " " There are features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or order. It is to be understood that the terms so used are interchangeable as appropriate, such that the embodiments of the invention described herein can be implemented, for example, in a sequence other than those illustrated or described herein. In addition, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to Those steps or units may include other steps or units not explicitly listed or inherent to such processes, methods, products or devices.

For convenience of description, spatially relative terms such as "above", "above", "on top", "above", etc., may be used herein to describe as in the drawings. The spatial positional relationship of one device or feature to other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation of the device described. For example, if the device in the figures is inverted, the device described as "above other devices or configurations" or "above other devices or configurations" will be positioned "below other devices or configurations" or "at Under other devices or configurations." Thus, the exemplary term "above" can include both "over" and "under". The device can also be positioned in other different ways (rotated 90 degrees or at other orientations) and the corresponding description of the space used herein is interpreted accordingly.

Exemplary embodiments in accordance with the present application will now be described in more detail with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. It is to be understood that the embodiments are provided so that this disclosure will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art, in which The thicknesses of the layers and regions are denoted by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 1 to FIG. 8 , an embodiment of the present invention provides an electrical box, including an electrical box body, a fan 2, and a heat conducting component. The main body of the electric box is a closed structure, and the fan 2 is disposed in the main body of the electric box; that is, the outside air cannot enter the inside of the main body of the electric box under the action of the rotation of the fan 2, and the air inside the main body of the electric box is in the electric box under the action of the fan 2. The inside of the body flows. The heat conductive member has a heat absorbing portion inside the main body of the electric box and a heat radiating portion located outside the main body of the electric box.

The electrical box provided by the embodiment of the present invention disturbs the air inside the main body of the electric box by the fan 2, and the air absorbs the heat of the heat dissipating component in the electric box, and then uses the heat conduction characteristic of the heat conducting part to make the heat absorbing part and the electric box of the heat conducting part The disturbed air heat exchange in the main body transfers heat to the heat radiating portion of the heat conducting member outside the main body of the electric box for heat dissipation. By setting the main body of the electrical box to a closed structure, impurities such as outside water vapor, dust or small animals such as pests and rats are effectively prevented from entering the inside of the electrical box, ensuring the heat dissipation effect of the components in the electrical box, and avoiding overheating damage of the components, effectively improving the efficiency. The service life of the electrical box; ensure the stable operation of the electrical box.

Moreover, since the electrical box body of the closed structure is provided, the effect of EMC (Electro Magnetic Compatibility) is improved, and the external electromagnetic wave signal has a reduced effect on the circuit inside the electrical box.

Table 1 Comparison of the measured temperature rise value of the existing external machine and the simulation value of the embodiment of the present application

It can be seen from the above experimental data that the electrical box provided by the embodiment of the present invention can effectively reduce the temperature of components inside thereof.

As shown in FIG. 2, the fan 2 is provided with a mounting leg; the mounting leg is connected to the inner wall of the electrical box body, and an air intake space is formed between the fan 2 and the inner wall of the electrical box body. In the present embodiment, the fan 2 is disposed on the cover 1. There is a certain air intake space between the fan 2 and the cover 1, and the distance between the fan 2 and the cover 1 is generally greater than 10 mm. Through the above settings, the smoothness of the air entering the fan 2 is effectively improved.

Further, the air blowing surface of the fan 2 faces the heat dissipating component on the PCB board 3 of the electrical box. Through the above settings, the heat dissipation effect of the heat dissipation components on the PCB board 3 is improved. Preferably, the heat dissipating component facing the air blowing surface of the fan 2 is a component having a large heat dissipating amount, such as an inductor or the like. Through the above settings, the airflow around the components with large heat generation is ensured to flow faster, so that the heat of the components can be taken away in time.

Among them, the higher-level components of the PCB board 3 are dispersed to avoid blocking the flow of the electric device and the internal airflow.

As shown in FIG. 3, the heat conducting member has a "U" shape structure, one end of the "U" shaped structure is a heat absorbing portion, and the other end of the "U" shaped structure is a heat absorbing portion; the PCB board 3 of the electrical box is located at the heat conducting member. Inside the groove. Through the above arrangement, the structural compactness of the electrical box is improved while ensuring the heat dissipation effect.

The heat-conducting member may also be an "L"-shaped structure or a "V"-shaped structure, etc., which are not repeatedly described herein and are all within the scope of protection.

As shown in FIG. 4-8, the heat conducting component is a heat pipe heat sink; the heat pipe heat sink includes a heat pipe 6, the heat absorbing portion includes a first heat pipe portion of the heat pipe 6 located inside the electrical box body, and the heat radiating portion includes the heat pipe 6 located outside the electrical box body The second heat pipe part. The refrigerant in the first heat pipe part absorbs heat to form a high-temperature gaseous refrigerant to the second heat pipe portion, and the high-temperature gas refrigerant is cooled by the gas in the environment to form a liquid refrigerant, and the liquid refrigerant flows into the first heat pipe portion in the pipe, so that Circulating heat transfer, the heat inside the electrical box is continuously transmitted to the outside of the electrical box.

The heat pipe 6 is generally a copper pipe, and may also be a pipe member made of other heat conductive materials.

In order to increase the endothermic efficiency, the endothermic portion further includes a heat absorbing fin structure 41 in heat exchange contact with the first heat pipe portion.

In this embodiment, the heat absorbing rib structure 41 includes a heat absorbing substrate and a heat absorbing rib; the heat absorbing rib is disposed on a side of the heat absorbing substrate away from the PCB board 3 of the electrical box. With the above arrangement, the heat absorbing substrate and the heat absorbing fins of the heat absorbing fin structure 41 absorb heat to be transferred to the first heat pipe portion.

It is also possible for the heat absorbing fin structure 41 to include only heat absorbing fins that are in direct contact with the first heat pipe portion.

As shown in FIG. 3, a plurality of heat absorbing fins are connected in parallel to the heat absorbing substrate. Of course, it can also be other structures, and will not be repeated here.

The PCB board 3 of the electrical box is provided with a heat dissipating component toward one side of the heat absorbing portion; the heat absorbing substrate is in heat exchange contact with the heat dissipating component.

Through the above arrangement, the PCB board 3 adopts the method of arranging components on one side, and the components such as the power component IPM, the diode, the IGBT and the rectifier bridge are in heat exchange contact with the heat absorbing substrate, thereby improving the production processing efficiency and further improving. The heat dissipation effect.

In this embodiment, the first heat pipe portion is in heat exchange contact with the heat absorbing substrate. With the above arrangement, heat exchange between the first heat pipe portion and the heat absorbing fin structure 41 is improved. Of course, the first heat pipe portion can also be in heat exchange contact with the heat absorbing fins. Wherein, the heat dissipating component and the first heat pipe portion are located on the same side of the heat absorbing substrate, and the heat dissipating component and the first heat pipe portion may be respectively located on both sides of the heat absorbing substrate.

As shown in FIG. 3, the heat dissipating portion further includes a heat dissipating fin structure 42 in heat exchange contact with the second heat pipe portion.

In this embodiment, the heat dissipation fin structure 42 includes a heat dissipation substrate and a heat dissipation fin; the heat dissipation fin is disposed on a side of the heat dissipation substrate away from the PCB board 3 of the electrical box. Through the above arrangement, the heat of the second heat pipe portion is diffused to the outside of the electrical box through the heat dissipation substrate and the heat dissipation fins.

It is also possible for the heat dissipating fin structure 42 to include only heat dissipating fins that are in direct contact with the second heat pipe portion.

In order to improve the heat dissipation effect, the second heat pipe portion is in heat exchange contact with the heat dissipation fins.

Preferably, the thickness of the heat absorbing substrate and the heat dissipation substrate is generally between 3 mm and 20 mm, and the support strength and the heat conduction effect are ensured on the basis of saving the amount of the material.

Further, the pitch of the adjacent two heat absorbing fins and the pitch of the adjacent two heat radiating fins are in the range of 5 mm to 30 mm, thereby ensuring the heat conduction effect.

In the present embodiment, the heat dissipating portion includes the heat absorbing fin structure 41 and the heat dissipating fin structure 42. The heat absorbing rib structure 41 includes a heat absorbing substrate and a heat absorbing rib; the heat dissipation rib structure 42 includes a heat dissipation substrate and a heat dissipation rib. The heat absorbing fin structure 41 and the heat dissipating fin structure 42 are both rib structures, and the specific structural parameters of the rib structure are as follows:

Table 2 Parameter Table of Rib Structure

Preferably, the heat dissipating component on the PCB board 3 of the electrical box is in heat exchange contact with the heat dissipating portion.

Further, the components on the PCB board 3 are disposed on the same side of the PCB board 3.

Further, the electrical box body includes a cover 1 and a case 5; the case 5 is provided with an opening structure for avoiding the heat radiating portion, and the PCB board 3 of the electrical box closes the opening structure. Through the above arrangement, the assembly of the electrical box is facilitated on the basis of ensuring that the main body of the electrical box is a closed structure.

The embodiment of the invention further provides an outdoor unit for an air conditioner, which comprises an electrical box, and the electrical box is any one of the above electrical boxes. Since the above electrical box has the above technical effects, the air conditioner having the above electrical box should also have the same technical effect, and will not be repeatedly described herein.

Moreover, the stable operation of the electrical box can further increase the AC current of the whole machine, and the compressor of the outdoor unit of the air conditioner can also operate at a higher frequency, especially the cooling capacity under high temperature conditions.

Further, the heat radiating portion of the electrical box is disposed corresponding to the fan of the air conditioner outdoor unit. Through the above settings, the heat dissipation effect of the electrical box is further improved.

In addition to the above, it should be noted that "one embodiment", "another embodiment", "an embodiment" and the like referred to in the specification refers to a specific feature, structure or structure described in connection with the embodiment. Features are included in at least one embodiment of the general description of the application. The appearance of the same expression in various places in the specification does not necessarily refer to the same embodiment. Further, when a particular feature, structure, or feature is described in conjunction with any embodiment, it is claimed that such features, structures, or characteristics are also included in the scope of the invention.

In the above embodiments, the descriptions of the various embodiments are different, and the details that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

An electrical box characterized by comprising:

a closed structure electrical box body;

a fan (2) disposed in the main body of the electrical box;

a heat conductive member having a heat absorbing portion inside the electrical box body and a heat radiating portion located outside the power box body.
The electrical box according to claim 1, wherein the fan (2) is provided with a mounting foot;

The mounting leg is connected to an inner wall of the electrical box body, and an air intake space is formed between the fan (2) and an inner wall of the electrical box body.
The electrical box according to claim 1, characterized in that the air blowing surface of the fan (2) faces the heat dissipating component on the PCB board (3) of the electrical box.
The electrical box according to claim 1, wherein said heat conducting member is a "U" shaped structure, one end of said "U" shaped structure is said heat absorbing portion, and said "U" shaped structure is further One end is the heat absorbing portion;

The PCB board (3) of the electrical box is located in the recess of the heat conducting component.
The electrical box according to claim 1, wherein said heat conducting member is a heat pipe radiator;

The heat pipe radiator includes a heat pipe (6), the heat absorbing portion includes a first heat pipe portion of the heat pipe (6) located inside the electrical box body, and the heat radiating portion includes the heat pipe (6) located at the a second heat pipe portion outside the main body of the electrical box.
The electrical box of claim 5 wherein said heat absorbing portion further comprises a heat absorbing fin structure (41) in heat exchange contact with said first heat pipe portion.
The electrical box according to claim 6, wherein said heat absorbing fin structure (41) comprises a heat absorbing substrate and a heat absorbing rib;

The heat absorbing fin is disposed on a side of the heat absorbing substrate away from the PCB board (3) of the electrical box.
The electrical box according to claim 7, wherein the PCB board (3) of the electrical box is provided with a heat dissipating component toward one side of the heat absorbing portion;

The heat absorbing substrate is in heat exchange contact with the heat dissipating component.
The electrical box of claim 7 wherein said first heat pipe portion is in heat exchange contact with said heat absorbing substrate.
The electrical box according to any one of claims 7-9, wherein the thickness of the heat absorbing substrate ranges from 3 mm to 20 mm;

And/or, the spacing between two adjacent heat absorbing fins ranges from 5 mm to 30 mm.
The electrical box of claim 5 wherein said heat dissipating portion further comprises a heat dissipating fin structure (42) in heat exchange contact with said second heat pipe portion.
The electrical box according to claim 11, wherein the heat dissipation fin structure (42) comprises a heat dissipation substrate and a heat dissipation fin;

The heat dissipation fins are disposed on a side of the heat dissipation substrate away from the PCB board (3) of the electrical box.
The electrical box of claim 12 wherein said second heat pipe portion is in heat exchange contact with said heat dissipating fins.
The electrical box according to claim 12 or 13, wherein the thickness of the heat dissipation substrate ranges from 3 mm to 20 mm;

And/or, the spacing between two adjacent heat dissipation fins ranges from 5 mm to 30 mm.
The electrical box according to claim 1, wherein the heat dissipating component on the PCB board (3) of the electrical box is in heat exchange contact with the heat dissipating portion.
The electrical box according to claim 1, wherein the electrical box body comprises a lid (1) and a box (5);

The box body (5) is provided with an opening structure for avoiding the heat radiating portion, and the PCB board (3) of the electrical box encloses the opening structure.
An air conditioner outdoor unit comprising an electrical box, wherein the electrical box is the electrical box according to any one of claims 1-16.
The air conditioner outdoor unit according to claim 17, wherein a heat radiating portion of said electric box is disposed corresponding to a fan of said air conditioner outdoor unit.