EP4345389A1

EP4345389A1 - Electric control box, air conditioner outdoor unit and air conditioner

Info

Publication number: EP4345389A1
Application number: EP21947863.3A
Authority: EP
Inventors: Nan Wang
Original assignee: GD Midea Air Conditioning Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2021-06-28
Filing date: 2021-09-01
Publication date: 2024-04-03
Also published as: CN215637643U; WO2023272927A1

Abstract

The present application discloses an electric control box, an air conditioner outdoor unit and an air conditioner. The electric control box comprises a box body and a heat sink; the box body is provided with a mounting cavity and a heat dissipation cavity provided outside the mounting cavity; the box body is provided with a mounting port used for communicating with the heat dissipation cavity and a heat exchange cavity; and the mounting cavity is used for mounting an electrical component. The heat sink comprises a heat conduction part and a heat dissipation part provided on the heat conduction part. The heat conduction part is connected to the box body and is used for heat-transfer connection with the electrical component in the mounting cavity. The heat dissipation part is provided at the mounting port and is at least partially located in the heat dissipation cavity. The box body is also provided with a first air passing port and a second air passing port that both communicate with an air intake side of the heat dissipation part. The first air passing port is arranged closer to the heat conduction part than the second air passing port, so as to guide an air flow to the end of the heat dissipation part close to the heat conduction part. The second air passing port is used for guiding the air flow to the end of the heat dissipation part distant from the heat conduction part.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese Patent Application No. 202121451766.3, filed on June 28, 2021 , the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present application relates to the technical field of air conditioners, and in particular to an electric control box, an air conditioner outdoor unit and an air conditioner.

BACKGROUND

At present, the electric control box of the air conditioner outdoor unit is usually provided in the compressor cavity to separate it from the heat exchange cavity where the condenser is located to prevent water, foreign matter, etc. from entering the electric control box. However, since the air conditioner compressor and electrical components are in a relatively closed space, both the compressor and electrical components will generate a large amount of heat when the air conditioner is running. This will cause the heat of the electric control box to be unable to be effectively dissipated, easily affecting the overall performance and shortening the life of components, which also poses a major safety hazard.

SUMMARY

The main purpose of the present application is to provide an electric control box, aiming to improve the dissipation effect of the electric control box.
In order to achieve the above objective, the present application provides an electric control box, including:

a box body including an installation cavity and a heat dissipation cavity provided outside the installation cavity, wherein the box body is provided with an installation port configured to communicate the heat dissipation cavity with the heat exchange cavity, and the installation cavity is configured to mount an electrical component; and
a heat sink including a heat conduction part and a heat dissipation part provided on the heat conduction part, the heat conduction part is connected to the box body and configured to connect to the electrical component in the installation cavity for heat transfer, and the heat dissipation part is provided on the installation port and at least partially located in the heat dissipation cavity;
the box body is further provided with a first air outlet and a second air outlet and both the first air outlet and the second air outlet are communicated with an air inlet side of the heat dissipation part, the first air outlet is provided closer to the heat conduction part than the second air outlet to guide an airflow to an end of the heat dissipation part close to the heat conduction part, and the second air outlet is configured to guide the airflow to an end of the heat dissipation part away from the heat conduction part.

In some embodiments, the box body is provided with a partition located between the heat dissipation cavity and the installation cavity, and the first air outlet is provided on the partition to communicate the installation cavity with the heat dissipation cavity.
In some embodiments, the installation cavity is provided with an air inlet configured to communicate with a compressor cavity of the air conditioner outdoor unit, a side of the partition facing the installation cavity is provided with a diversion wall, the diversion wall and the partition are enclosed to form a flow guide channel, and one end of the flow guide channel is communicated with the first air outlet and the other end of the flow guide channel extends toward the air inlet.
In some embodiments, a cross-sectional area of the flow guide channel gradually increases in a direction approaching the air inlet.
In some embodiments, the diversion wall is provided with a top enclosure wall opposite to the partition, and a distance between the top enclosure wall and the partition gradually increases in the direction approaching the air inlet.
In some embodiments, a lower edge of the first air outlet away from the heat conduction part extends obliquely toward the heat sink in a direction from the heat dissipation part toward the heat conduction part.
In some embodiments, the second air outlet is provided between the partition and the air inlet side of the heat dissipation part, and is configured to communicate with the compressor cavity of the air conditioner outdoor unit.
The present application further provides an air conditioner outdoor unit including a above-mentioned electric control box and a shell of the air conditioner outdoor unit. The electric control box is mounted on the shell of the air conditioner outdoor unit, the shell is provided with the heat exchange cavity, and the heat dissipation cavity is communicated with the heat exchange cavity through the installation port.
In some embodiments, an outdoor fan is provided inside the heat exchange cavity, and the installation port is communicated with a negative pressure side of the outdoor fan.
The present application further provides an air conditioner including the above-mentioned air conditioner outdoor unit.
In the technical solution of the present application, a first air outlet and a second air outlet are provided on the box body, both the first air outlet and the second air outlet are connected to the air inlet side of the heat dissipation part. The first air outlet is provided closer to the heat conduction part than the second air outlet. Since the first air outlet is closer to the heat conduction part than the second air outlet, the airflow flowing from the first air outlet to the heat dissipation part can flow to the end of the heat dissipation part close to the heat conduction part as much as possible, the airflow flowing from the second air outlet can flow to the end of the heat dissipation part away from the heat conduction part as much as possible, and the airflow flowing from the first air outlet to the heat dissipation part and the airflow flowing from the second air outlet to the heat dissipation part can also flow to the part between the two ends of the heat dissipation part. The airflow can flow to both the part of the heat dissipation part close to the heat conduction part and the part far away from the heat conduction part through the first air outlet and the second air outlet, thereby increasing the airflow flowing through the heat dissipation part and increasing the area for heat exchange between the airflow and the heat dissipation part. Moreover, the end of the heat dissipation part close to the heat conduction part is the position with the highest temperature on the heat dissipation part. By causing the airflow flowing from the first air outlet to the heat dissipation part to directly flow to the end of the heat dissipation part close to the heat conduction part, the heat dissipation is carried out at the position with the highest temperature on the heat dissipation part, that is to say, through the technical solution of the present application, the heat dissipation effect of the electric control box can be greatly improved.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in some embodiments of the present application or in the related art, a brief introduction will be given to the accompanying drawings required in the description of the embodiments or the related art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those skilled in the art, other accompanying drawings can be obtained based on the structures shown in these drawings without any creative effort.

FIG. 1 is a cross-sectional view of an electric control box according to some embodiments of the present application.
FIG. 2 is a cross-sectional view of the electric control box in FIG. 1 being mounted on a shell of an air conditioner outdoor unit.
FIG. 3 is an enlarged view at portion A in FIG. 2.

Description of reference signs

Reference sign	Name	Reference sign	Name
100	electric control box	14	partition
10	box body	15	diversion wall
11	installation cavity	151	top enclosure wall
111	first cavity bottom wall	152	side enclosure wall
12	heat dissipation cavity	16	flow guide channel
121	second cavity bottom wall	20	heat sink
122	cavity top wall	21	heat conduction part
131	first air outlet	22	heat dissipation part
132	second air outlet	30	shell
133	installation port	31	compressor cavity
134	fixed port	32	heat exchange cavity
135	air inlet

The implementation of the purpose, functional characteristics and advantages of the present application will be further described with reference to the attached drawings and in combination with embodiments.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The technical solutions of embodiments of the present application will be clearly and completely described with reference to the drawings of the present application. Obviously, the described embodiments are only some rather than all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of the present application.
It should be noted that all directional indicators (such as up, down, left, right, front, rear, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement situation, etc. among components in a specific attitude (as shown in the drawings). If the specific attitude changes, the directional indication also changes accordingly.
In addition, the descriptions related to "first", "second" and the like in the present application are merely for descriptive purposes, and should not be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined by "first" and "second" may explicitly or implicitly include at least one such feature. Besides, the meaning of "and/or" appearing in the whole text is to include three parallel solutions, taking "A and/or B as an example", including solution A, or solution B, or a solution that satisfies both A and B at the same time. In addition, the various embodiments can be combined with each other, but the combination must be based on what can be achieved by those skilled in the art. When the combination of the embodiments is contradictory or cannot be achieved, it should be considered that such combination does not exist, or is not within the scope of the present application.
In some embodiments of the present application, as shown in FIG. 1 to FIG. 3, the electric control box 100 includes a box body 10 and a heat sink 20. The box body includes an installation cavity 11 and a heat dissipation cavity 12 provided outside the installation cavity 11. The box body 10 is provided with an installation port 133 configured to communicate the heat dissipation cavity 12 with the heat exchange cavity 32, and the installation cavity 11 is configured to mount an electrical component. The box body 10 may be mounted inside or above the compressor cavity 13.
The heat sink 20 includes a heat conduction part 21 and a heat dissipation part 22 provided on the heat conduction part 21. The heat conduction part 21 is connected to the box body 10 and configured to connect to the electrical component in the installation cavity 11 for heat transfer. The heat dissipation part 22 is provided on the installation port 133 and at least partially located in the heat dissipation cavity 12. The airflow can flow through the heat dissipation part 22. When the airflow passes through the heat dissipation part 22, and the temperature of the airflow is lower than the temperature of the heat dissipation part 22, the airflow can exchange heat with the heat dissipation part 22, thereby carrying away the heat which is transferred from the heat conduction part 21 to the heat dissipation part 22.
The box body 10 is further provided with a first air outlet 131 and a second air outlet 132 and both the first air outlet 131 and the second air outlet 132 are communicated with an air inlet side of the heat dissipation part 22. The first air outlet 131 is provided closer to the heat conduction part 21 than the second air outlet 132 to guide an airflow to an end of the heat dissipation part 22 close to the heat conduction part 21, and the second air outlet 132 is configured to guide the airflow to an end of the heat dissipation part 22 away from the heat conduction part 21. The air inlet side of the heat dissipation part 22 is the side of the heat dissipation part 22 where the air before heat-transfer flows into. In contrast, the heat dissipation part 22 also has an air outlet side. The air outlet side of the heat dissipation part 22 is the side of the heat dissipation part 22 where the heat-transferred air flows out.
In these embodiments, the heat dissipation part 22 has a heat dissipation air duct. The air inlet side of the heat dissipation part 22 is the air inlet side of the heat dissipation air duct. When the airflow flows through the heat dissipation air duct, the airflow can contact the heat dissipation part 22 and thereby exchange heat with the heat dissipation part 22 to take away the heat transferred from the heat conduction part 21 to the heat dissipation part 22. The heat dissipation part 22 may have various structures. For example, in these embodiments, the heat dissipation part 22 includes a plurality of heat dissipation fins provided at intervals. The plurality of heat dissipation fins are all connected to the heat conduction part 21. A heat dissipation air duct is formed between any two adjacent heat dissipation fins. The present application is not limited to this. In other embodiments, the heat dissipation part 22 may also be in a grid shape or a structure composed of several criss-crossed metal wires.
In addition, the negative pressure generated by the outdoor fan at the heat sink 20 can be used to drive the air flow from the first air outlet 131 and the second air outlet 132 to pass through the heat dissipation part 22. An additional fan may also be provided to drive the air flow from the first air outlet 131 and the second air outlet 132 to pass through the heat dissipation part 22.
Since the first air outlet 131 is disposed closer to the heat conduction part 21 than the second air outlet 132, the air flowing from the first air outlet 131 to the heat dissipation part 22 can flow to the end of the heat dissipation part 22 close to the heat conduction part 21 as much as possible, the air flowing from the second air outlet 132 to the heat dissipation part 22 can flow to the end of the heat dissipation part 22 away from the heat conduction part 21 as much as possible, and the airflow from the first air outlet 131 to the heat dissipation part 22 and the airflow from the second air outlet 132 to the heat dissipation part 22 may also flow toward the portion between both ends of the heat dissipation part 22.
In the technical solution of the present application, a first air outlet 131 and a second air outlet 132 are provided on the box body 10, both the first air outlet 131 and the second air outlet 132 are connected to the air inlet side of the heat dissipation part 22. The first air outlet 131 is provided closer to the heat conduction part 21 than the second air outlet 132. Since the first air outlet 131 is closer to the heat conduction part 21 than the second air outlet 132, the airflow flowing from the first air outlet 131 to the heat dissipation part 22 can flow to the end of the heat dissipation part 22 close to the heat conduction part 21 as much as possible, the airflow flowing from the second air outlet 132 can flow to the end of the heat dissipation part 22 away from the heat conduction part 21 as much as possible, and the airflow flowing from the first air outlet 131 to the heat dissipation part 22 and the airflow flowing from the second air outlet 132 to the heat dissipation part 22 can also flow to the part between the two ends of the heat dissipation part 22. The airflow can flow to both the part of the heat dissipation part 22 close to the heat conduction part 21 and the part far away from the heat conduction part 21 through the first air outlet 131 and the second air outlet 132, thereby increasing the airflow flowing through the heat dissipation part 22 and increasing the area for heat exchange between the airflow and the heat dissipation part 22. Moreover, the end of the heat dissipation part 22 close to the heat conduction part 21 is the position with the highest temperature on the heat dissipation part 22. By causing the airflow flowing from the first air outlet 131 to the heat dissipation part 22 to directly flow to the end of the heat dissipation part 22 close to the heat conduction part 21, the heat dissipation is carried out at the position with the highest temperature on the heat dissipation part 22, that is to say, through the technical solution of the present application, the heat dissipation effect of the electric control box 100 can be greatly improved.
In some embodiments, the box body 10 is provided with a partition 14 located between the heat dissipation cavity 12 and the installation cavity 11, and the first air outlet 131 is provided on the partition 14 to communicate the installation cavity 11 with the heat dissipation cavity 12. That is to say, the heat dissipation cavity 12 and the installation cavity 11 are separated by the partition 14. By arranging the first air outlet 131 on the partition 14, the airflow can first flow into the installation cavity 11, and then flow from the first air outlet 131 to the heat dissipation part 22. In this way, the airflow can take away part of the heat in the installation cavity 11 in the process of flowing through the installation cavity 11, which is beneficial to improving the heat dissipation effect in the installation cavity 11. The application is not limited to this. In other embodiments, the first air outlet 131 may also be provided on the cavity wall of the heat dissipation cavity 12 adjacent to the partition 14 to directly communicate with the compressor cavity 31 or directly communicate with the space outside the shell 30 of the air conditioner outdoor unit.
In some embodiments, the installation cavity 11 is provided with an air inlet 135 configured to communicate with a compressor cavity 31 of the air conditioner outdoor unit, a side of the partition 14 facing the installation cavity 11 is provided with a diversion wall 15, the diversion wall 15 and the partition 14 are enclosed to form a flow guide channel 16, and one end of the flow guide channel 16 is communicated with the first air outlet 131 and the other end of the flow guide channel 16 extends toward the air inlet 135. In these embodiments, the heat dissipation part 22 and the heat conduction part 21 are distributed in the up and down direction, and the first air outlet 131 and the second air outlet 132 are distributed in the up and down direction. The installation cavity 11 has a first cavity bottom wall 111, and the first cavity bottom wall 111 is connected to the lower end of the partition 14, and the air inlet 135 is provided on the first cavity bottom wall 111. One end of the diversion wall 15 surrounds the edge of the first air outlet 131, and the other end extends toward the air inlet 135. One end of the diversion wall 15 away from the first air outlet 131 is spaced apart from the air inlet 135. The flow guide channel 16 is formed by enclosing the diversion wall 15 and the portion of the partition 14 located on the lower side of the first air outlet 131. That is to say, the flow guide channel 16 is inclined relative to the up and down direction, so that one end of the flow guide channel 16 faces the end of the heat dissipation part 22 close to the heat conduction part 21, and the other end of the flow guide channel 16 faces the air inlet 135. The air inlet 135, the flow guide channel 16 and the end of the heat dissipation part 22 close to the heat conduction part 21 are generally located on a straight line. When the airflow flows from the air inlet 135 into the installation cavity 11, the airflow can directly flow to the end of the heat dissipation part 22 close to the heat conduction part 21 through the flow guide channel 16, so that the air flow from the first air outlet 131 to the heat sink 20 can flow more concentratedly to the end of the heat dissipation part 22 close to the heat conduction part 21. The action position is more direct and precise, and can better dissipate the highest temperature location on the heat dissipation part. 22. Moreover, it can better avoid the situation where the air flow changes in the process of flowing from the air inlet 135 to the heat dissipation part 22. In this way, in the process of flowing from the air inlet 135 to the heat dissipation part 22, the air flow running resistance is small and the loss is small, such that the flow velocity and flow rate at the end of the heat dissipation part 22 close to the heat conduction part 21 are larger, which can further improve the heat dissipation effect at the end of the heat dissipation part 22 close to the heat conduction part 21.
In addition, since the compressor cavity 31 is provided with an outdoor heat exchanger (condenser), the temperature of the compressor cavity 31 is lower than that of the heat exchange cavity 32 provided with an outdoor heat exchanger. Since the airflow passing through the compressor cavity 31 dissipates heat for the heat sink 20, the heat dissipation effect is better. Moreover, compared with the situation where the air inlet 135 is directly connected to the space outside the shell 30, this can reduce the possibility of external water vapor entering the electric control box 100 and ensure the electrical safety of the electric control box 100. The application is not limited to this. In other embodiments, the heat dissipation part 22 and the heat conduction part 21, the first air outlet 131 and the second air outlet 132 may all extend in the transverse direction. In addition, in other embodiments, the air inlet 135 can also be directly communicated with the space outside the shell 30. For example, the air inlet 135 can be directly connected to the space outside the shell 30 through a ventilation duct; or the part of the box body 10 provided with the air inlet 135 is attached to the shell 30, and the shell 30 is provided with through holes; or the part of the box body 10 provided with the air inlet 135 is extended out of the shell 30.
In some embodiments, a cross-sectional area of the flow guide channel 16 gradually increases in a direction approaching the air inlet 135. That is to say, the size of one end of the flow guide channel 16 close to the air inlet 135 is larger than the size of the first air outlet 131, and the size of the flow guide channel 16 gradually increases in the direction close to the air inlet 135. The flow guide channel 16 is in the shape of a trumpet. In this way, when the airflow flows from the air inlet 135 to the first air outlet 131, the flow rate of the airflow can be gradually increased, so that the flow rate of the airflow flowing to the heat dissipation part 22 is relatively larger, thereby further improving the heat dissipation effect of the heat dissipation part 22. The application is not limited to this. In other embodiments, the size of the flow guide channel 16 is equal everywhere.
In some embodiments, the diversion wall 15 is provided with a top enclosure wall 151 opposite to the partition 14, and a distance between the top enclosure wall 151 and the partition 14 gradually increases in the direction approaching the air inlet 135. Specifically, the diversion wall 15 also has two side enclosure walls 152. The upper end of the top enclosure wall 151 is connected to the upper edge of the first air outlet 131. The lower end of the top enclosure wall 151 extends toward the air inlet 135. The side enclosure walls 152 are provided on two opposite sides of the first air outlet 131 in the transverse direction, and are connect the top enclosure wall 151 with the partition 14, that is to say, the partition 14, the top enclosure wall 151 and the two side enclosure walls 152 are collectively enclosed to form a flow guide channel 16. Among the top enclosure wall 151 and the partition 14, at least the top enclosure wall 151 extends obliquely in the direction from the heat dissipation part 22 toward the heat conduction part 21 and away from the heat sink 20. Such arrangement ensures that the cross-sectional area of the flow guide channel 16 gradually increases in the direction close to the air inlet 135, and at the same time, it can be ensured that the end of the flow guide channel 16 away from the first air outlet 131 extends toward the air inlet 135, such that the air inlet 135, the flow guide channel 16 and the end of the heat dissipation part 22 close to the heat conduction part 21 are generally located on a straight line. The application is not limited to this. In other embodiments, the top enclosure wall 151 and the partition 14 can also be parallel, and the distance between the two side enclosure walls 152 gradually increases in the direction approaching the air inlet 135. Or while the distance between the top enclosure wall 151 and the partition 14 gradually increases in the direction approaching the air inlet 135, the distance between the two side enclosure walls 152 gradually increases in the direction approaching the air inlet 135.
In some embodiments, a lower edge of the first air outlet 131 away from the heat conduction part 21 extends obliquely toward the heat sink 20 in a direction from the heat dissipation part 22 toward the heat conduction part 21. Specifically, the lower edge of the first air outlet 131 away from the heat conduction part 21 is the portion of the partition 14 located between the first air outlet 131 and the first cavity bottom wall 111, that is to say, the portion of the partition 14 located between the first air outlet 131 and the first cavity bottom wall 111 extends obliquely in the direction from the heat dissipation part 22 toward the heat conduction part 21 and toward the heat sink 20. With this arrangement, the angle between the portion of the partition 14 between the first air outlet 131 and the first cavity bottom wall 111 and the direction in which the air inlet 135 points toward the first air outlet 131 can be reduced, so that when the flow guide channel 16 is formed by enclosing the diversion wall 15 and the portion of the partition 14 located between the first air outlet 131 and the first cavity bottom wall 111, the airflow blocked by the portion of the partition 14 located between the first air outlet 131 and the first cavity bottom wall 111 can be reduced, and the air inlet 135 flows into the flow guide channel 16 is better guided to the first air outlet 131, which can further reduce the loss of the air flow from the air inlet 135 to the heat dissipation part 22, ensuring that the flow velocity and flow rate of the airflow toward the end of the heat dissipation part 22 close to the heat conduction part 21 are relatively large.
In some embodiments, the second air outlet 132 is provided between the partition 14 and the air inlet side of the heat dissipation part 22, and is configured to communicate with the compressor cavity 31 of the air conditioner outdoor unit. Specifically, the heat dissipation cavity 12 has a second cavity bottom wall 121. The second cavity bottom wall 121 is connected to the lower end of the partition 14. The second air outlet 132 is provided on the second cavity bottom wall 121 and is located between the partition 14 and the air inlet side of the heat dissipation part 22. The installation port 133 is located on the side of the second cavity bottom wall 121 away from the partition 14, that is to say, the installation port 133 is opposite to the partition 14, and the heat dissipation part 22 is at least partially located above the second cavity bottom wall 121. Such arrangement can make the air flow from the first air outlet 131 to the heat sink 20 after passing through the installation cavity 11 and the air flow directly from the compressor cavity 31 through the second air outlet 132 to the heat sink 20 are relatively independent, which can ensure that both the first air outlet 131 and the second air outlet 132 have a large amount of airflow flowing to the heat sink 20 to improve the heat dissipation effect. Moreover, compared with the situation where the second air outlet 132 is directly connected to the space outside the shell 30, this can reduce the possibility of external water vapor entering the heat exchange cavity 32. The present application is not limited to this. In other embodiments, the second air outlet 132 can also be directly connected to the space outside the shell 30.
In some embodiments, the cavity wall of the heat dissipation cavity 12 is provided with a fixed port 134. The fixed port 134 is communicated with the installation cavity 11. The heat conduction part 21 is provided on the installation port 133 to be exposed in the installation cavity 11. In this way, the heat conduction part 21 is fixed through the fixed port 134, and at the same time, it also facilitates the heat transfer connection between the heat conduction part 21 and the electrical components in the installation cavity 11. The heat conduction part 21 can be clamped at the fixed port 134 through a snap-in structure; or the heat conduction part 21 can be locked at the fixed port 134 through screws; or the heat conduction part 21 can be bonded at the fixed port 134. The present application is not limited to this. In other embodiments, the cavity wall of the installation cavity 11 can also be set as a thermal conductive structure (for example, made of metal with good thermal conductivity such as copper). The heat conduction part 21 is attached to the thermal conductive structure, and then the electrical components installed in the installation cavity 11 are thermally connected to the thermally conductive structure.
In some embodiments, the heat dissipation cavity 12 has a cavity top wall 122, the cavity top wall 122 is opposite to and spaced apart from the second cavity bottom wall 121, the cavity top wall 122 is connected to the upper end of the partition 14, the installation cavity 11 extends to the cavity top wall 122, and the cavity top wall 122 is provided with a fixed port 134. That is to say, the heat dissipation part 22 extends from the cavity top wall 122 to the second cavity bottom wall 121. The electrical components in the installation cavity 11 can be connected to the heat conduction part 21 through the thermal conductive structure extending above the fixed port 134, or some electrical components can be provided above the heat conduction part 21 to facilitate the arrangement of the electrical components in the installation cavity 11.
The present application further provides an air conditioner outdoor unit including a shell 30 of the air conditioner outdoor unit and the electric control box 100. The specific structure of the electric control box 100 refers to the above-mentioned embodiments. Since the air conditioner outdoor unit adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be mentioned here. The electric control box 100 is installed on the shell 30. The shell 30 is provided with a heat exchange cavity 32. The heat dissipation cavity 12 of the electric control box 100 is connected to the heat exchange cavity 32 through the installation port 133. In these embodiments, the air conditioner outdoor unit also includes an outdoor fan, an outdoor heat exchanger and a compressor. The shell 30 has a heat exchange cavity 32 and a compressor cavity 31. The outdoor fan and outdoor heat exchanger are located in the heat exchange cavity 32. The compressor is located in the compressor cavity 31, and the electric control box 100 is used to be installed above or beside the compressor. The electric control box 100 can be installed in the compressor cavity 31, or can be integrally disposed above the compressor cavity 31.
In some embodiments, an outdoor fan is provided inside the heat exchange cavity 32, and the installation port 133 is communicated with a negative pressure side of the outdoor fan. That is to say, when the outdoor fan is working, the outdoor fan can generate negative pressure at the installation port 133, thereby driving the airflow in the compressor cavity 31 to flow from the first air outlet 131 and the second air outlet 132 through the heat sink 20 to the outdoor fan. In this way of the outdoor fan driving the airflow to the heat sink 20, it is not necessary to install additional fans, thereby simplify the structure of the air conditioner outdoor unit, and reducing the energy consumption and cost of the air conditioner outdoor unit.
When the air conditioner outdoor unit of the technical solution of the present application adopts the above-mentioned electric control box, the negative pressure generated by the outdoor fan can be used to drive the airflow in the compressor cavity 31 to flow from the first air outlet 131 and the second air outlet 132 to the heat sink 20, thereby is dissipated heat by the heat sink 20. Since the first air outlet 131 is closer to the heat conduction part 21 than the second air outlet 132, the airflow flowing from the first air outlet 131 to the heat dissipation part 22 can flow to the end of the heat dissipation part 22 close to the heat conduction part 21 as much as possible, the airflow flowing from the second air outlet 132 can flow to the end of the heat dissipation part 22 away from the heat conduction part 21 as much as possible, and the airflow flowing from the first air outlet 131 to the heat dissipation part 22 and the airflow flowing from the second air outlet 132 to the heat dissipation part 22 can also flow to the part between the two ends of the heat dissipation part 22. The airflow can flow to both the part of the heat dissipation part 22 close to the heat conduction part 21 and the part far away from the heat conduction part 21 through the first air outlet 131 and the second air outlet 132, thereby increasing the airflow flowing through the heat dissipation part 22 and increasing the area for heat exchange between the airflow and the heat dissipation part 22. Moreover, the end of the heat dissipation part 22 close to the heat conduction part 21 is the position with the highest temperature on the heat dissipation part 22. By causing the airflow flowing from the first air outlet 131 to the heat dissipation part 22 to directly flow to the end of the heat dissipation part 22 close to the heat conduction part 21, the heat dissipation is carried out at the position with the highest temperature on the heat dissipation part 22, which may greatly decrease the risk of overheating of the electric control box 100.
The present application also proposes an air conditioner, which includes an air conditioner indoor unit and an air conditioner outdoor unit. The specific structure of the air conditioner outdoor unit refers to the above-mentioned embodiments. Since this air conditioner adopts all the technical solutions of all the above-mentioned embodiments, all the beneficial effects brought by at least the technical solutions of the above embodiments will not be described in detail here. The refrigerant system of the air conditioner outdoor unit is communicated with the refrigerant system of the air conditioner indoor unit. The air conditioner indoor unit can be a floor-standing air conditioner indoor unit or a wall-mounted air conditioner indoor unit.
The above are only some embodiments of the present application, and do not limit the patent scope of the present application. Under the inventive concept of the present application, equivalent structural transformations made by using the contents of the description and drawings of the present application, or direct/indirect application in other related technical fields are included in the patent protection scope of this application.

Claims

An electric control box applied to an air conditioner outdoor unit provided with a heat exchange cavity, characterized in that:
the electric control box comprises:
a box body comprising an installation cavity and a heat dissipation cavity provided outside the installation cavity, wherein the box body is provided with an installation port configured to communicate the heat dissipation cavity with the heat exchange cavity, and the installation cavity is configured to mount an electrical component; and

a heat sink comprising a heat conduction part and a heat dissipation part provided on the heat conduction part, wherein the heat conduction part is connected to the box body and configured to connect to the electrical component in the installation cavity for heat transfer, and the heat dissipation part is provided on the installation port and at least partially located in the heat dissipation cavity; and

the box body is further provided with a first air outlet and a second air outlet and both the first air outlet and the second air outlet are communicated with an air inlet side of the heat dissipation part, the first air outlet is provided closer to the heat conduction part than the second air outlet to guide an airflow to an end of the heat dissipation part close to the heat conduction part, and the second air outlet is configured to guide the airflow to an end of the heat dissipation part away from the heat conduction part.
The electric control box according to claim 1, wherein the box body is provided with a partition located between the heat dissipation cavity and the installation cavity, and the first air outlet is provided on the partition to communicate the installation cavity with the heat dissipation cavity.
The electric control box according to claim 2, wherein the installation cavity is provided with an air inlet configured to communicate with a compressor cavity of the air conditioner outdoor unit, a side of the partition facing the installation cavity is provided with a diversion wall, the diversion wall and the partition are enclosed to form a flow guide channel, and one end of the flow guide channel is communicated with the first air outlet and the other end of the flow guide channel extends toward the air inlet.
The electric control box according to claim 3, wherein a cross-sectional area of the flow guide channel gradually increases in a direction approaching the air inlet.
The electric control box according to claim 4, wherein the diversion wall is provided with a top enclosure wall opposite to the partition, and a distance between the top enclosure wall and the partition gradually increases in the direction approaching the air inlet.
The electric control box according to claim 3, wherein a lower edge of the first air outlet away from the heat conduction part extends obliquely toward the heat sink in a direction from the heat dissipation part toward the heat conduction part.
The electric control box according to any one of claims 2 to 6, wherein the second air outlet is provided between the partition and the air inlet side of the heat dissipation part, and is configured to communicate with the compressor cavity of the air conditioner outdoor unit.
An air conditioner outdoor unit, comprising a shell of the air conditioner outdoor unit and the electric control box according to any one of claims 1 to 7, wherein the electric control box is mounted on the shell of the air conditioner outdoor unit, the shell is provided with the heat exchange cavity, and the heat dissipation cavity is communicated with the heat exchange cavity through the installation port.
The air conditioner outdoor unit according to claim 8, wherein an outdoor fan is provided inside the heat exchange cavity, and the installation port is communicated with a negative pressure side of the outdoor fan.
An air conditioner, comprising the air conditioner outdoor unit according to claim 9.