Electric control box and heating equipment

Abstract

The application belongs to the technical field of air conditioners, and particularly relates to an electric control box and a heating and ventilation device. The electric control box comprises a box body and a circuit board assembly arranged in the box body. The box body comprises a body part and a protruding part protruding from one side of the body part. The body part is provided with an air inlet, and the protruding part is provided with an air outlet. An air duct is formed between the air inlet and the air outlet, and at least part of the circuit board assembly is located in the air duct. The electric control box has good heat dissipation effect, low noise, low energy consumption, good compatibility and low manufacturing cost.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and more specifically, to an electrical control box and HVAC equipment. Background Technology

[0002] HVAC equipment, such as air conditioning outdoor units, typically uses an electrical control box to control the operation of the entire unit. The main control board, driver board, and other circuit board components of this control box generate a significant amount of heat during operation. If this heat is not dissipated in time, it can cause internal components to overheat and malfunction. Traditional control box cooling solutions employ three methods: natural cooling through ventilation holes, fan cooling, and refrigerant pipe cooling. Natural cooling through ventilation holes is inefficient and only suitable for small units. Fan cooling is noisy and increases energy consumption, while refrigerant pipe cooling is costly. Utility Model Content

[0003] The purpose of this application is to provide an electrical control box and HVAC equipment, which has good heat dissipation, low noise, low energy consumption, good compatibility, and saves manufacturing costs.

[0004] The first aspect of this application provides an electrical control box, including a box body and a circuit board assembly disposed within the box body. The box body includes a main body and a protrusion extending from one side of the main body. The main body is provided with an air inlet, and the protrusion is provided with an air outlet. A ventilation channel is formed between the air inlet and the air outlet, and at least a portion of the circuit board assembly is located within the ventilation channel.

[0005] The electrical control box provided according to the embodiments of this application includes a box body and a circuit board assembly disposed within the box body. By placing the main body of the box body outside the housing of the HVAC equipment, and embedding the protrusion of the box body into the main air duct inside the housing of the HVAC equipment, the main body is provided with an air inlet, and the protrusion is provided with an air outlet, forming a ventilation channel between the air inlet and the air outlet. At least a portion of the circuit board assembly is located within the ventilation channel, thereby allowing the airflow within the main air duct during the operation of the HVAC equipment to remove the heat generated by the circuit board assembly. Compared with the traditional method of opening heat dissipation holes for natural heat dissipation, this application accelerates the airflow speed within the electrical control box, resulting in better heat dissipation. It is applicable to units of any size and has good compatibility. Since the fan is omitted, the noise is low and the energy consumption is low. Compared with refrigerant pipe heat dissipation, it saves manufacturing costs.

[0006] In addition, the electrical control box according to this application may also have the following additional technical features:

[0007] In some possible implementations, the main body includes a bottom wall, a cover, and a plurality of first side walls connected between the bottom wall and the cover. The bottom wall, the cover, and the plurality of first side walls enclose a first accommodating cavity. The protrusion includes a plurality of second side walls that enclose a second accommodating cavity and an air outlet. The bottom wall has an opening that communicates with the second accommodating cavity. The circuit board assembly is connected to the bottom wall. The air inlet is disposed on at least one of the plurality of first side walls, and the air outlet is disposed parallel to the bottom wall.

[0008] In some possible implementations, there are multiple air inlets, which are arranged in a grid pattern on the first sidewall.

[0009] In some possible implementations, among the plurality of first sidewalls, a plurality of air inlets are provided on the first sidewalls extending in a vertical direction and spaced apart in a vertical direction. The air inlets are formed by the first sidewalls protruding outward in a direction away from the first accommodating cavity, and the ports of the air inlets are arranged facing downward.

[0010] In some possible implementations, the circuit board assembly includes a main control board and a heat sink, with the main control board connected to the bottom wall and the heat sink disposed on the side of the main control board facing the second accommodating cavity.

[0011] In some possible implementations, the radiator includes a base plate and a plurality of heat sinks disposed on the base plate. The base plate is connected to the bottom wall and is connected to the main control board by fasteners. The plurality of heat sinks have openings, and an air duct extending along the air outlet direction is formed between two adjacent heat sinks.

[0012] In some possible implementations, the circuit board assembly further includes a sub-control board connected to the bottom wall, and the orthographic projection of the sub-control board on the bottom wall at least partially overlaps with the opening; the second accommodating cavity includes a first cavity and a second cavity, an air outlet is formed on one side of the second cavity, a heat sink is located in the second cavity, and the width of the first cavity in the vertical direction is smaller than the width of the second cavity in the vertical direction.

[0013] In some possible implementations, a sealing sleeve is provided on the first sidewall, and the electrical control box also includes a wiring harness, one end of which passes through the sealing sleeve and is electrically connected to the circuit board assembly, and the other end of which is electrically connected to the power supply.

[0014] In some possible implementations, the cover includes a cover plate and a side plate bent from one end of the cover plate. The edges of a plurality of first side walls are respectively provided with first flanges, and the edges of the bottom wall are provided with second flanges. The cover plate is connected to a portion of the first flanges, and the side plates are respectively connected to the second flanges and another portion of the first flanges.

[0015] The second aspect of this application provides a heating, ventilation, and air conditioning (HVAC) device, comprising: a housing having an inlet and an outlet, with a main air duct formed between the inlet and the outlet; and an electrical control box according to an embodiment of this application, wherein the main body of the electrical control box is located outside the housing, and a protrusion of the electrical control box is embedded in the main air duct inside the housing.

[0016] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein:

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein:

[0019] Figure 1 This is a schematic diagram of the structure of the HVAC equipment according to an embodiment of this application;

[0020] Figure 2 for Figure 1 The HVAC equipment shown is a cross-sectional view along direction AA;

[0021] Figure 3 This is a schematic diagram of the structure of the electrical control box according to an embodiment of this application;

[0022] Figure 4 for Figure 3 A schematic diagram of the hidden portion of the electrical control box shown;

[0023] Figure 5 for Figure 4 A schematic diagram of the structure of the circuit board assembly;

[0024] Figure 6 for Figure 3 The diagram shows the structure of the electrical control box after the cover is hidden.

[0025] Figure 7 for Figure 3 The diagram shows the structure of the cover of the electrical control box.

[0026] The labels in the attached diagram are as follows:

[0027] 1000. Heating, ventilation, and air conditioning equipment;

[0028] 100. Electrical control box; 200. Housing; 201. Inlet; 202. Outlet; 300. Fan; 301. Motor; 302. Fan wheel assembly; 400. Heat exchanger; X. First direction; Y. Vertical direction;

[0029] 1. Box body; 11. Main body; 110. Air inlet; 111. First side wall; 1111. First flange; 112. Bottom wall; 1121. Second flange; 1120. Opening; 113. Cover; 1131. Cover plate; 1132. Side plate; 114. Sealing sleeve; 115. Fastening accessories;

[0030] 12. Protrusion; 120. Air outlet; 121. Second sidewall; 1221. First cavity; 1222. Second cavity;

[0031] 2. Circuit board assembly; 21. Main control board; 22. Sub-control board; 23. Heat sink; 231. Base plate; 232. Heat sink. Detailed Implementation

[0032] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.

[0033] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0034] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0035] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0036] Figure 1 This is a schematic diagram of the structure of the HVAC equipment according to an embodiment of this application. Figure 2 for Figure 1 The HVAC equipment shown is a cross-sectional view along direction AA. Figure 3 This is a schematic diagram of the structure of the electrical control box according to an embodiment of this application. Figure 4 for Figure 3 The diagram shows the structure of the electrical control box after the hidden part of the structure is shown.

[0037] like Figure 1 and Figure 2 As shown, this application embodiment provides a heating, ventilation, and air conditioning (HVAC) device 1000, which can be an indoor air conditioning unit, an outdoor air conditioning unit, or other air conditioning equipment. For ease of description, this application embodiment uses an indoor air conditioning unit as an example for illustration.

[0038] The HVAC equipment 1000 of this application embodiment includes a housing 200 and an electrical control box 100. The housing 200 has an inlet 201 and an outlet 202, forming a main air duct between the inlet 201 and the outlet 202. A portion of the electrical control box 100 is located outside the housing 200, and another portion is embedded in the main air duct inside the housing 200. A fan 300 and a heat exchanger 400 are disposed inside the housing 200. The fan 300 includes a motor 301 and a fan wheel assembly 302 disposed at at least one end of the output shaft of the motor 301. For example, the fan 300 includes two fan wheel assemblies 302 disposed at both ends of the output shaft of the motor 301. The fan wheel assembly 302 rotates under the drive of the motor 301 and generates negative pressure inside the housing 200. The outlet 202 of the housing 200 is disposed close to the fan wheel assembly 302, such as... Figure 2 As shown, the two outlets 202 of the casing 200 are respectively provided for the two impeller assemblies 302, and the inlet 201 of the casing 200 is provided on the side close to the heat exchanger 400. Figure 2 As shown by the hollow arrow, airflow is introduced into the housing 200 through inlet 201. The fan 300 serves as the power source and blows airflow towards outlet 202 to exchange heat with the heat exchanger 400. The airflow after heat exchange circulates through the main air duct and flows out from outlet 202 under the drive of the fan 300, acting on the indoor environment to cool or heat, thereby adjusting and improving the indoor environment to achieve the effect of cooling or heating.

[0039] This application embodiment also provides an electrical control box 100, a portion of which is embedded in the main air duct of the housing 200, and another portion located outside the housing 200. For example... Figure 3 and Figure 4 As shown, the electrical control box 100 includes a box body 1 and a circuit board assembly 2 disposed within the box body 1. The box body 1 includes a main body 11 and a protrusion 12 protruding from one side of the main body 11. The main body 11 is located outside the housing 200, and the protrusion 12 is embedded in the main air duct within the housing 200. The main body 11 is provided with an air inlet 110, and the protrusion 12 is provided with an air outlet 120. A ventilation duct is formed between the air inlet 110 and the air outlet 120, and at least a portion of the circuit board assembly 2 is located within the ventilation duct.

[0040] Specifically, the side panel of the housing 200 has clearance holes, and the protrusion 12 of the box body 1 of the electrical control box 100 passes through the clearance holes into the main air duct and is fixed to the side panel with bolts, while the main body 11 is located outside the housing 200. In this way, it is convenient to inspect and wire the electrical control box 100, and it is also convenient to assemble the electrical control box 100 into the housing 200 of the HVAC equipment 1000, thereby improving installation efficiency.

[0041] The circuit board assembly 2 inside the housing 1 generates heat during operation. The main body 11 of the housing 1 is provided with an air inlet 110, and the protruding part 12 is provided with an air outlet 120, forming a ventilation channel between the air inlet 110 and the air outlet 120. For example... Figure 3 As indicated by the arrows, outside air is introduced into the housing 1 through the air inlet 110 and flows out into the main air duct through the air outlet 120. This carries the heat generated by the circuit board assembly 2 into the main air duct, where the airflow within the main air duct carries away the heat generated by the circuit board assembly 2. Compared to the traditional method of natural heat dissipation through ventilation holes, this application accelerates the airflow within the electrical control box 100, resulting in better heat dissipation. It is suitable for both small and large units, offering good compatibility. Because the fan is omitted, noise and energy consumption are lower; compared to refrigerant pipe cooling, it saves on manufacturing costs.

[0042] In some embodiments, the body portion 11 includes a bottom wall 112, a cover 113, and a plurality of first side walls 111 connected between the bottom wall 112 and the cover 113 to form a first accommodating cavity. The protrusion 12 includes a plurality of second side walls 121 that surround and form a second accommodating cavity and an air outlet 120. The bottom wall 112 has an opening 1120 communicating with the second accommodating cavity. The circuit board assembly 2 is connected to the bottom wall 112. An air inlet 110 is disposed on at least one of the plurality of first side walls 111. The air outlet 120 is disposed parallel to the bottom wall 112.

[0043] like Figure 4 As shown, the cover 113 is concealed to clearly illustrate the internal structure of the control box 100. The main body 11 includes a bottom wall 112, a cover 113, and a plurality of first side walls 111 connecting the bottom wall 112 and the cover 113. A first accommodating cavity is formed between the bottom wall 112, the cover 113, and the plurality of first side walls 111. The circuit board assembly 2 is connected to the bottom wall 112, and a portion of the circuit board assembly 2 is disposed in the first accommodating cavity. An opening 1120 in the bottom wall 112 communicates with a second accommodating cavity. An air inlet 110 is disposed on at least one of the plurality of first side walls 111, and the air outlet 120 is disposed parallel to the bottom wall 112. The air outlet 120 is aligned with the first direction X of the airflow direction in the main air duct.

[0044] Thus, as Figure 3 As indicated by the middle arrow, outside air is introduced into the first accommodating cavity through the air inlet 110, flows through the circuit board assembly 2 into the second accommodating cavity, and then flows out from the air outlet 120 into the main air duct. Since the direction of the hot air flowing out from the air outlet 120 is consistent with the direction of air flow in the main air duct, it can prevent airflow turbulence and further improve the heat dissipation effect of the electrical control box 100.

[0045] In some embodiments, there are multiple air inlets 110, which are arranged in a grid pattern on the first sidewall 111.

[0046] like Figure 4 As shown, the main body 11 includes three first sidewalls 111 and a bottom wall 112 forming a first accommodating cavity. Air inlets 110 can be disposed on at least one of the first sidewalls 111. For example, multiple air inlets 110 are respectively disposed on two opposing first sidewalls 111, and the multiple air inlets 110 are arranged in a grid-like pattern on the first sidewalls 111. With this arrangement, under the negative pressure of the HVAC equipment 1000, outside air can enter the first accommodating cavity from the multiple air inlets 110 of the two opposing first sidewalls 111, increasing the air intake. After flowing through the circuit board assembly 2, the air carries away the heat generated by the circuit board assembly 2, then enters the second accommodating cavity, and flows out from the air outlet 120 into the main air duct, further improving the heat dissipation effect of the electrical control box 100.

[0047] In some embodiments, among the plurality of first sidewalls 111, a plurality of air inlets 110 are provided on the first sidewalls 111 extending in the vertical direction Y. The air inlets 110 are formed by the first sidewalls 111 protruding outward in a direction away from the first accommodating cavity, and the ports of the air inlets 110 are arranged facing downward.

[0048] like Figure 1 and Figure 2 As shown, the first direction X is the airflow direction within the main air duct, and the vertical direction Y is perpendicular to the first direction X. When the main body 11 of the electrical control box 100 is fixed to the side plate of the housing 200, the first side wall 111 where the air inlet 110 is located extends along the vertical direction Y. Figure 4 As shown, multiple air inlets 110 on two first sidewalls 111 arranged opposite each other along the first direction X are formed by the first sidewalls 111 being punched outwards in a direction away from the first accommodating cavity, and the ports of the air inlets 110 are arranged downwards. This achieves the effect of air flow while preventing rainwater or condensate from dripping into the box 1 under its own gravity, thereby improving the reliability of the electrical control box 100.

[0049] In some embodiments, the circuit board assembly 2 includes a main control board 21 and a heat sink 23. The main control board 21 is connected to the bottom wall 112, and the heat sink 23 is disposed on the side of the main control board 21 facing the second accommodating cavity.

[0050] like Figure 4As shown, the main control board 21 has heat-generating elements that require rapid heat dissipation via a heat sink 23 on its back. The heat sink 23 can be a fan to improve the heat dissipation of the main control board 21. Alternatively, the heat sink 23 can be a finned heat sink to reduce noise. Outside air is introduced into the first accommodating cavity through the air inlet 110, flows through the circuit board assembly 2, and enters the second accommodating cavity. The heat sink 23 accelerates the airflow around the heat-generating elements, quickly removing most of the heat generated by the main control board 21. The air then flows out from the air outlet 120 into the main air duct, further improving the heat dissipation of the control box 100.

[0051] Figure 5 for Figure 4 A schematic diagram of the circuit board assembly.

[0052] In some embodiments, the radiator 23 includes a base plate 231 and a plurality of heat sinks 232 disposed on the base plate 231. The base plate 231 is connected to the bottom wall 112 and the base plate 231 is connected to the main control board 21 by fasteners. The plurality of heat sinks 232 pass through openings 1120, and an air duct extending along the air outlet 120 is formed between two adjacent heat sinks 232.

[0053] like Figure 5 As shown, the radiator 23 can be a finned heat dissipation device, which includes a base plate 231 and multiple heat dissipation fins 232 disposed on the base plate 231. The multiple heat dissipation fins 232 pass through the opening 1120 of the bottom wall 112 and enter the second receiving cavity. An air duct is formed between two adjacent heat dissipation fins 232. The air duct extends along the air outlet 120 in the air outlet direction, i.e., the first direction X. Multiple air ducts can increase the heat dissipation area of ​​the radiator 23, improve the heat dissipation efficiency, and reduce noise compared with a fan. The base plate 231 of the radiator 23 is connected to the main control board 21 by four fasteners at the corners. The gap between the base plate 231 and the main control board 21 can accelerate airflow and prevent high-temperature air from accumulating between the base plate 231 and the main control board 21, which would affect the heat dissipation effect of the main control board 21.

[0054] Figure 6 for Figure 3 The diagram shows the structure of the hidden cover of the electrical control box.

[0055] In some embodiments, the circuit board assembly 2 further includes a sub-control board 22, which is connected to the bottom wall 112, and the orthographic projection of the sub-control board 22 on the bottom wall 112 at least partially overlaps with the opening 1120; the second accommodating cavity includes a first cavity 1221 and a second cavity 1222, an air outlet 120 is formed on one side of the second cavity 1222, the heat sink 23 is located in the second cavity 1222, and the width of the first cavity 1221 along the vertical direction Y is smaller than the width of the second cavity 1222 along the vertical direction Y.

[0056] like Figure 6 As shown, the second accommodating cavity includes a first cavity 1221 and a second cavity 1222 arranged sequentially along the first direction X. The first cavity 1221 and the second cavity 1222 are composed of... Figure 6 Separated by dotted lines, the second cavity 1222 forms an air outlet 120 on one side along the first direction X. The radiator 23 passes through the opening 1120 and is located inside the second cavity 1222. The sub-control board 22 is arranged side by side with the main control board 21, and the orthographic projection of the sub-control board 22 on the bottom wall 112 at least partially overlaps with the opening 1120. That is, the main control board 21 corresponds to the second cavity 1222, and the sub-control board 22 corresponds to at least part of the first cavity 1221. The structure is compact and occupies little space.

[0057] Furthermore, since the secondary control board 22 generates less heat and is smaller in size, it is not necessary to install an additional heat sink for heat dissipation. Accordingly, the width of the first cavity 1221 in the vertical direction is smaller than the width of the second cavity 1222 in the vertical direction. On the one hand, the first cavity 1221 facilitates the fixing of the secondary control board 22; on the other hand, it can increase the airflow speed from the first cavity 1221 to the second cavity 1222, further improving the heat dissipation effect.

[0058] In some embodiments, a sealing sleeve 114 is provided on the first sidewall 111, and the electrical control box 100 also includes a wire harness (not shown in the figure), one end of which passes through the sealing sleeve 114 and is electrically connected to the circuit board assembly 2, and the other end of which is electrically connected to the power supply.

[0059] like Figure 6 As shown, the main body 11 includes three first sidewalls 111 forming a first accommodating cavity and a bottom wall 112. Two of the first sidewalls 111 extending in the vertical direction Y are each provided with a plurality of air inlets 110. Two sealing sleeves 114 are provided on one of the lower first sidewalls 111 extending in the horizontal direction. One end of the wire harness passes through the sealing sleeve 114 and is electrically connected to the circuit board assembly 2; the other end of the wire harness is electrically connected to a power source. The sealing sleeves 114 can be made of rubber or silicone to improve the sealing between the wire harness and the first sidewalls 111.

[0060] Optionally, such as Figure 4 As shown, fastening fittings 115 are also provided on the bottom wall 112 to assist in organizing and fixing the wire harness, reducing the space occupied by the wire harness. The other end of the wire harness is electrically connected to the power supply, and the circuit board assembly 2 supplies power to the display panel and fan 300 and other components on the housing 200 of the HVAC equipment 1000 through the wire harness.

[0061] Figure 7 for Figure 3 The diagram shows the structure of the cover of the electrical control box.

[0062] In some embodiments, the cover 113 includes a cover plate 1131 and a side plate 1132 bent at one end of the cover plate 1131. The edges of a plurality of first side walls 111 are respectively provided with first flanges 1111, and the edges of the bottom wall 112 are provided with second flanges 1121. The cover plate 1131 is connected to a portion of the first flanges 1111, and the side plate 1132 is connected to the second flanges 1121 and another portion of the first flanges 1111.

[0063] like Figure 6 and Figure 7 As shown, the cover 113 includes a cover plate 1131 and a side plate 1132 bent from one end of the cover plate 1131. The side plate 1132 is used to close the upper notch of the main body 11. The cover plate 1131 and the side plate 1132 are integrally formed by bending, and there is no gap at the bend. This arrangement can prevent rainwater or condensate from dripping into the box 1 under its own weight, thus improving the sealing performance of the box 1.

[0064] Threaded holes are provided on the first flange 1111 of the first sidewall 111 and the second flange 1121 of the bottom wall 112, respectively. Through holes are provided on the cover plate 1131 and the side plate 1132, respectively. The cover plate 1131 is connected to a portion of the first flange 1111 by screws, and the side plate 1132 is connected to the second flange 1121 and another portion of the first flange 1111, respectively. The cover 113 is configured in this way to improve the efficiency of assembling and disassembling the circuit board assembly 2.

[0065] The electrical control box 100 provided according to the embodiments of this application includes a box body 1 and a circuit board assembly 2 disposed within the box body 1. By placing the main body 11 of the box body 1 outside the housing 200 of the HVAC equipment 1000, and embedding the protrusion 12 of the box body 1 into the main air duct within the housing 200 of the HVAC equipment 1000, the main body 11 is provided with an air inlet 110, and the protrusion 12 is provided with an air outlet 120. A ventilation duct is formed between the air inlet 110 and the air outlet 120, thereby allowing the airflow within the main air duct during the operation of the HVAC equipment 1000 to remove the heat generated by the circuit board assembly 2. Compared with the traditional method of opening heat dissipation holes for natural heat dissipation, this application accelerates the airflow speed within the electrical control box 100, resulting in better heat dissipation. It is applicable to units of any size and has good compatibility. Since the fan is omitted, the noise is low and the energy consumption is low. Compared with refrigerant pipe heat dissipation, it saves manufacturing costs.

[0066] It is understood that the electrical control box 100 provided in this application embodiment can also be applied to other air conditioning equipment such as air conditioner outdoor units, which will not be described in detail here.

[0067] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0068] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electrical control box, characterized in that, The device includes a housing and a circuit board assembly disposed within the housing. The housing includes a main body and a protrusion extending from one side of the main body. The main body has an air inlet, and the protrusion has an air outlet. A ventilation channel is formed between the air inlet and the air outlet, and at least a portion of the circuit board assembly is located within the ventilation channel.

2. The electrical control box according to claim 1, characterized in that, The main body includes a bottom wall, a cover, and a plurality of first side walls connected between the bottom wall and the cover. The bottom wall, the cover, and the plurality of first side walls enclose a first accommodating cavity. The protrusion includes a plurality of second side walls enclosing a second accommodating cavity and an air outlet. The bottom wall has an opening communicating with the second accommodating cavity. The circuit board assembly is connected to the bottom wall. The air inlet is disposed on at least one of the plurality of first sidewalls, and the air outlet is disposed parallel to the bottom wall.

3. The electrical control box according to claim 2, characterized in that, The number of air inlets is multiple, and the multiple air inlets are arranged in a grid pattern at intervals on the first sidewall.

4. The electrical control box according to claim 2, characterized in that, Among the plurality of first sidewalls, the first sidewalls extending in the vertical direction are provided with a plurality of air inlets spaced apart in the vertical direction. The air inlets are formed by the first sidewalls protruding outward in a direction away from the first accommodating cavity, and the ports of the air inlets are arranged facing downward.

5. The electrical control box according to claim 2, characterized in that, The circuit board assembly includes a main control board and a heat sink. The main control board is connected to the bottom wall, and the heat sink is disposed on the side of the main control board facing the second accommodating cavity.

6. The electrical control box according to claim 5, characterized in that, The radiator includes a base plate and a plurality of heat sinks disposed on the base plate. The base plate is connected to the bottom wall and is connected to the main control board by fasteners. The plurality of heat sinks pass through the opening, and an air duct extending along the air outlet direction is formed between two adjacent heat sinks.

7. The electrical control box according to claim 5, characterized in that, The circuit board assembly also includes a secondary control board, which is connected to the bottom wall, and the orthographic projection of the secondary control board on the bottom wall at least partially overlaps with the opening; The second accommodating cavity includes a first cavity and a second cavity, with the air outlet formed on one side of the second cavity, and the heat sink located inside the second cavity. The vertical width of the first cavity is smaller than the vertical width of the second cavity.

8. The electrical control box according to claim 2, characterized in that, A sealing sleeve is provided on the first sidewall. The electrical control box also includes a wire harness. One end of the wire harness passes through the sealing sleeve and is electrically connected to the circuit board assembly. The other end of the wire harness is electrically connected to the power supply.

9. The electrical control box according to claim 2, characterized in that, The cover includes a cover plate and a side plate bent from one end of the cover plate. The edges of the plurality of first side walls are respectively provided with first flanges, and the edges of the bottom wall are provided with second flanges. The cover plate is connected to a portion of the first flanges, and the side plates are respectively connected to the second flanges and another portion of the first flanges.

10. A heating, ventilation, and air conditioning (HVAC) device, characterized in that, include: The casing has an inlet and an outlet, with a main air duct formed between the inlet and the outlet; and The electrical control box as described in any one of claims 1 to 9, wherein the main body of the electrical control box is located outside the housing, and the protrusion of the electrical control box is embedded in the main air duct inside the housing.

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