CN211019789U

CN211019789U - Heat radiation structure of electric control box of outdoor unit of air conditioner

Info

Publication number: CN211019789U
Application number: CN201922137915.8U
Authority: CN
Inventors: 敖志超; 邱名友; 周奇杰
Original assignee: Sichuan Changhong Air Conditioner Co Ltd
Current assignee: Sichuan Changhong Air Conditioner Co Ltd
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-07-14
Anticipated expiration: 2029-12-03

Abstract

The utility model discloses an automatically controlled box heat radiation structure of air condensing units relates to the air conditioner field, solves the current not good problem of automatically controlled box radiating effect. The utility model adopts the technical proposal that: the heat dissipation structure of the electric control box of the outdoor unit of the air conditioner comprises a penetrating type heat dissipation air channel and a box top air channel, wherein the two heat dissipation paths form forced convection in the electric control box by utilizing negative pressure of a fan cavity, so that the electric control box is subjected to heat dissipation. The path of the through type heat dissipation air duct is a printed board, the bottom of the electric control box, a middle partition board and a fan cavity, so that the problem of heat dissipation dead zones is solved; the top of the electric control box forms a box top air channel, an air inlet of the box top air channel is communicated with an inner cavity of the electric control box, an air outlet of the box top air channel is communicated with a fan cavity at the back of the electric control box, and hot air in the electric control box is directly pumped out through the box top air channel. The utility model is suitable for a dispel the heat to automatically controlled box, the radiating efficiency is high, is favorable to maintaining electrical system's normal operating.

Description

Heat radiation structure of electric control box of outdoor unit of air conditioner

Technical Field

The utility model relates to an air conditioning field specifically is an automatically controlled box heat radiation structure of air condensing units.

Background

The electrical components in the electrical box of the outdoor unit of the air conditioner have large heat productivity. Conventionally, the heat dissipation has been mainly performed by means of a heat sink mounted on the back of the printed board. With the miniaturization development of the outdoor unit, the compressor cavity is continuously compressed; in order to reasonably utilize the space, the installation mode of the electric control box is changed from the traditional horizontal installation at the top of the compressor cavity into the vertical adherence installation at the upper part of the middle clapboard and facing the compressor cavity. Therefore, the heat dissipation of the compressor body can cause adverse effects on the heat dissipation of electrical components in the electric control box, and the heat dissipation condition becomes worse.

In order to improve such a situation, patent documents disclose that a heat dissipation air duct structure is arranged on an electronic control box, and hot air in the electronic control box is guided to a fan cavity and discharged out of an outdoor unit by using a negative pressure effect of the fan cavity, so that the temperature of electrical components of the electronic control box is reduced. However, for small electronic devices such as high-heating resistance elements close to the surface of the printed board, the generated heat is not easy to be discharged due to the position dispersion, and the heat is easy to be blocked and locally high-temperature is caused due to insufficient heat dissipation at the bottom of the printed board, so that the normal operation of the whole electric control system is affected.

Disclosure of Invention

The utility model provides an air condensing units automatically controlled box heat radiation structure at first, solve the current not good problem of automatically controlled box radiating effect.

The utility model provides a technical scheme that its technical problem adopted is: the heat dissipation structure of the electric control box of the outdoor unit of the air conditioner comprises the electric control box and a middle partition plate positioned at the back of the electric control box, wherein a printed board is arranged in the electric control box, gaps are formed between four edges of the printed board and the inner wall of the electric control box, gaps are formed between the bottom surface of the printed board and the bottom surface of the electric control box, a vent hole is formed in the printed board, a hole is formed in the back surface of the electric control box, heat dissipation holes are formed in the middle partition plate at positions corresponding to the back of the electric control box and communicated with a fan cavity, and a penetrating type heat dissipation air duct of the printed board, the bottom; the top of the electric control box is provided with a ventilation body, the ventilation body is respectively provided with an air inlet and an air outlet, the air inlet and the air outlet are communicated in the ventilation body and form a box top air channel, the air inlet is communicated with the inner cavity of the electric control box, and the air outlet is communicated with a fan cavity on the back of the electric control box.

Further, the method comprises the following steps: the printed board is provided with a plurality of vent holes, and the vent holes are arranged at the positions of the components arranged close to the wall and between the high-low components.

Further, the method comprises the following steps: the holes on the electric control box and the heat dissipation holes on the middle partition plate are arranged in a staggered mode.

Further, the method comprises the following steps: the holes in the electric control box and the ventilation holes in the printed board are arranged in a staggered mode.

Specifically, the method comprises the following steps: the diameter of the vent hole on the printed board is not more than 15mm, and the orifice height of the heat dissipation hole of the middle partition board is not more than 6 mm.

Further, the method comprises the following steps: the hole opening of the air outlet end of the heat dissipation hole of the middle partition plate is vertically downward and/or faces to the opposite side of the heat exchanger.

Further, the method comprises the following steps: the ventilating body and the electric control box are integrated, and the box top air channel is bent in the ventilating body.

Specifically, the box top air duct comprises a horizontal section and a vertical section, the section of the box top air duct connected with the air inlet is the horizontal section, the section of the box top air duct connected with the air outlet is the vertical section, and the vertical section of the box top air duct passing through the air inlet and the air outlet is in an inverted L shape.

Specifically, the method comprises the following steps: the air inlet is a plurality of air inlet holes arranged in parallel, and the air outlet is provided with a grid.

More specifically: the air outlet department of the ventilation body sets up horizontal muscle and erects the muscle, and horizontal muscle forms the rectangle exhaust vent that a plurality of ranks were arranged with erecting the muscle.

The utility model has the advantages that: the fan cavity forms negative pressure when the outdoor unit of the air conditioner operates, the penetrating type heat dissipation air duct is under the action of pressure difference, hot air in the bottom area of the printed board is discharged layer by layer along the printed board, the bottom of the electric control box and heat dissipation holes of the middle partition board, enters the fan cavity and is finally discharged out of the outdoor unit; the electric control box and the compression cavity have an assembly gap or an air inlet, cold air can be supplemented from the outside to balance the air pressure in the electric control box and the compression cavity, and stable air flow is maintained. Because a gap is formed between the printed board and the electric control box, hot air can enter the open holes at the bottom of the electric control box along the gaps at the periphery of the printed board, and then is discharged into the fan cavity through the heat dissipation holes of the middle partition board and is discharged out of the outdoor unit. The printed board is provided with the vent hole which can cover the heating element of the printed board, so that the problem of heat dissipation dead zones is solved. The top of the electric control box forms a box top air channel, and hot air in the electric control box is directly pumped out. The ventilation body sets up in the top of automatically controlled box, and the ventilation body can form the topside of automatically controlled box, and the event sets up the restriction in box top wind channel little, can set up the width in box top wind channel bigger, improves the radiating effect of automatically controlled box.

The penetrating type heat dissipation air duct and the box top air duct both utilize negative pressure of the fan cavity to form forced convection to dissipate heat of the electric control box, so that the heat dissipation environment of electric elements of the electric control box of the outdoor unit of the air conditioner is improved, the influence of high temperature on the reliability of electronic elements is reduced, the heat dissipation efficiency of the electric control box is improved, and the normal operation of an electric control system is favorably maintained.

The ventilation holes in the printed board and the heat dissipation holes in the middle partition board are respectively arranged in a staggered mode with the holes in the electric control box, direct through of heat dissipation air flow is avoided, arrangement of the through type heat dissipation air duct is optimized, and the improvement of heat dissipation effects is facilitated.

The box top air channel is bent in the ventilation body, vertical downward arrangement of the air outlet is facilitated, and therefore impurities such as rainwater and dust in the box top air channel cavity are prevented from entering the electric control box from the air outlet. The air outlet sets up the grid, can reduce air outlet air current turbulent flow, and the noise reduction blocks impurity such as rainwater, dust and gets into box top wind channel from the air outlet.

Drawings

Fig. 1 is an exploded view of an embodiment of a heat dissipation structure of an electric control box of an outdoor unit of an air conditioner.

Fig. 2 is an axonometric view of the electronic control box in the embodiment of the present invention.

Fig. 3 is a structural diagram of the front side of the electric control box in the embodiment of the present invention.

Fig. 4 is a structural diagram of the air inlet at the top of the electronic control box in the embodiment of the present invention.

Fig. 5 is a structural diagram of an air outlet at the top of the electric control box in the embodiment of the present invention.

Fig. 6 is a partially enlarged view of the printed board of fig. 1.

Fig. 7 is a structural diagram of the middle partition plate in the embodiment of the present invention.

Reference numerals: the electronic control box comprises an electronic control box 1, an opening 11, a ventilation body 12, an air inlet 13, an air outlet 14, a radiator 15, a middle partition plate 2, a heat dissipation hole 21, a printed board 3 and a ventilation hole 31.

Detailed Description

The invention will be further explained with reference to the drawings.

As shown in fig. 1, the utility model discloses air condensing units automatically controlled box heat radiation structure, including automatically controlled box 1 and the median septum 2 that is located automatically controlled box 1 back, installation printing board 3 in automatically controlled box 1. Gaps are arranged between the four edges of the printed board 3 and the inner wall of the electric control box 1, gaps are arranged between the bottom surface of the printed board 3 and the bottom surface of the electric control box 1, and the gaps guarantee that gas between the electric control box 1 and the printed board 3 can flow. The printed board 3 is provided with ventilation holes 31 as shown in fig. 1 and 6. The ventilation holes 31 are located near adherently arranged components, in particular near "short" tall heat generating components surrounded by more "tall" components. Wherein "tall" and "short" refer to the height of the component. The shape and number of the vent holes 31 are not limited, and are specifically determined according to the arrangement condition of components on the printed board 3. The number of the vent holes 31 is generally multiple, and the diameter of the vent holes 31 is less than or equal to 15 mm.

The back of the electrical control box 1 is provided with an opening 11, see fig. 2 and 3. The shape of the opening 11 is not limited to any form, and for example, the opening 11 is rectangular. The opening 11 may be suitably made large in order to increase the ventilation effect. The shape, the number and the distribution mode of the open pores 11 at the bottom of the electric control box 1 are specifically adjusted according to the space and the structural allowance. The back of the electronic control box 1 is provided with a heat sink 15, as shown in fig. 3, the heat sink 15 is used for auxiliary heat dissipation of the electronic control box 1. The positions of the openings 11 of the electronic control box 1 and the ventilation holes 31 on the printed board 3 do not preferably correspond to each other one by one.

The middle clapboard 2 is provided with a heat dissipation hole 21 at the position corresponding to the back of the electric control box 1, and the heat dissipation hole 21 is communicated with the fan cavity. A penetrating type heat dissipation air duct of a printed board 3, the back of the electric control box 1, the middle partition board 2 and the fan cavity is formed between the electric control box 1 and the fan cavity. The number, the orifice width and the hole arrangement mode of the heat dissipation holes 21 are not limited, and are specifically adjusted according to space and structural allowance. The heat dissipation holes 21 are preferably arranged in a staggered manner with respect to the openings 11 of the electronic control box 1, and the height of the openings of the heat dissipation holes 21 is preferably not more than 6 mm. The hole opening of the air outlet end of the heat dissipation hole 21 can have three modes: the first opening direction faces to the opposite side of the heat exchanger end; secondly, the opening direction is vertical downwards; third, there are the first two opening orientations at the same time, as shown in FIG. 7. The heat dissipation holes 21 have the above size and structure, so that impurities such as rainwater and dust can be effectively prevented from entering the electronic control box 1 through the heat dissipation air duct.

The above-mentioned through type heat dissipation air duct solves the problem that the electronic control box has a heat dissipation "dead zone", in order to enhance the heat dissipation capability of the electronic control box 1, the top of the electronic control box 1 is further provided with a box top air duct, referring to fig. 2 to 5, the top of the electronic control box 1 is provided with a ventilation body 12, the ventilation body 12 is respectively provided with an air inlet 13 and an air outlet 14, the air inlet 13 and the air outlet 14 are communicated inside the ventilation body 12 and form a box top air duct, wherein the air inlet 13 is communicated with the inner cavity of the electronic control box 1, the air outlet 14 is communicated with a fan cavity at the back of the electronic control box 1, the ventilation body 12 can be an independent component and is directly connected to the top of the electronic control box 1, or the ventilation body 12 and the electronic control box 1 are integrated, the ventilation body 12 is the top edge of the electronic control box 1, as shown in fig. 2 and 3, the box top air duct in the ventilation body 12 is preferably bent, so as to prevent splashed water droplets from directly passing through the box top air duct from the air outlet 14 and entering the electronic control box 1, for example, the box top air duct includes a horizontal section and a vertical air duct L.

The air inlet 13 of the ventilation body 12 is a plurality of air inlet holes arranged in parallel, as shown in fig. 3 and 4. The air inlet 13 is strip-shaped, and the connecting ribs between the air inlet holes can ensure the strength of the ventilation body 12 at the air inlet 13. Printed board 3 is placed in electric control box 1, and the bottom surface of air inlet 13 is flush with the board body of printed board 3, so that heat generated by electric elements on the printed board can quickly enter air inlet 13, as shown in fig. 3.

The air outlet 14 department sets up the grid, and the grid is used for reducing the air current turbulent flow, and the noise risk is reduced to stop impurity such as rainwater, dust and get into box top wind channel. The grilles can be in a strip shape, or the grilles are horizontal ribs and vertical ribs arranged at the air outlet 14, and the horizontal ribs and the vertical ribs are mutually vertical or obliquely crossed to form a plurality of rectangular or parallelogram air outlet holes arranged in rows and columns, as shown in fig. 2 and 5.

Claims

1. Automatically controlled box heat radiation structure of air condensing units, including automatically controlled box (1) and well baffle (2) that are located automatically controlled box (1) back, installation printing board (3), its characterized in that in automatically controlled box (1): gaps are arranged between four edges of a printed board (3) and the inner wall of an electric control box (1), gaps are arranged between the bottom surface of the printed board (3) and the bottom surface of the electric control box (1), vent holes (31) are arranged on the printed board (3), holes (11) are arranged on the back surface of the electric control box (1), heat dissipation holes (21) are arranged in the middle partition board (2) at positions corresponding to the back of the electric control box (1), the heat dissipation holes (21) are communicated with a fan cavity, and a penetrating type heat dissipation air duct of the printed board (3) -the bottom of the electric control box (1) -the middle partition board (2) -the fan cavity is formed between the electric control box (1) and the fan; the top of the electric control box (1) is provided with a ventilation body (12), the ventilation body (12) is respectively provided with an air inlet (13) and an air outlet (14), the air inlet (13) and the air outlet (14) are communicated inside the ventilation body (12) and form a box top air channel, the air inlet (13) is communicated with the inner cavity of the electric control box (1), and the air outlet (14) is communicated with a fan cavity on the back of the electric control box (1).

2. The heat dissipating structure of an outdoor unit electric control box of an air conditioner of claim 1, wherein: the printed board (3) is provided with a plurality of vent holes (31), and the vent holes (31) are arranged at the positions of the components arranged close to each other and between the high and low components.

3. The heat dissipating structure of an outdoor unit electric control box of an air conditioner of claim 1, wherein: the opening (11) on the electric control box (1) and the heat dissipation hole (21) on the middle partition plate (2) are arranged in a staggered mode.

4. The heat dissipating structure of an outdoor unit electric control box of an air conditioner of claim 1, wherein: the opening (11) on the electric control box (1) and the vent hole (31) on the printed board (3) are arranged in a staggered mode.

5. The heat dissipating structure of an outdoor unit electric control box of an air conditioner of claim 1, wherein: the diameter of a vent hole (31) on the printed board (3) is not more than 15mm, and the height of an orifice of a heat dissipation hole (21) of the middle partition board (2) is not more than 6 mm.

6. The heat dissipating structure of an outdoor unit electric control box of an air conditioner of claim 1, wherein: the hole of the air outlet end of the heat dissipation hole (21) of the middle partition plate (2) is vertically downward and/or faces to the opposite side of the heat exchanger.

7. An outdoor unit electric control box heat dissipation structure of an air conditioner as recited in any one of claims 1 to 6, wherein: the ventilating body (12) and the electric control box (1) are integrated, and the box top air channel is bent in the ventilating body (12).

8. The heat dissipating structure of an outdoor unit electric control box of an air conditioner of claim 7, wherein the top box air duct includes a horizontal section and a vertical section, the section of the top box air duct connected to the air inlet (13) is the horizontal section, the section of the top box air duct connected to the air outlet (14) is the vertical section, and the top box air duct is inverted L in a vertical section passing through the air inlet (13) and the air outlet (14).

9. The outdoor unit electric control box heat dissipation structure of claim 7, wherein: the air inlet (13) is a plurality of air inlet holes which are arranged in parallel, and the air outlet (14) is provided with a grid.

10. The outdoor unit electric control box heat dissipation structure of claim 9, wherein: the air outlet (14) of the ventilation body (12) is provided with a transverse rib and a vertical rib, and the transverse rib and the vertical rib form a plurality of rectangular air outlet holes arranged in ranks.