Air conditioner outdoor unit

Abstract

The utility model discloses an air conditioner outdoor unit which comprises a machine shell, an electric control box, an electric control board and an air guide piece, the machine shell comprises a machine shell body and a top cover, and an exhaust air channel is formed in the machine shell; the top cover is arranged on the top of the machine shell body and provided with an outer exhaust outlet communicating with the exhaust air channel. The electric control box is installed on the machine shell body, the electric control box, the machine shell body and the top cover define a containing cavity, the containing cavity is provided with an air inlet and an air outlet, the air inlet and the air outlet are arranged in a spaced mode in the first direction, and the air outlet is formed in the machine shell body and communicates with the exhaust air channel; the electric control board is mounted in the accommodating cavity, and a radiator is arranged on the electric control board; the air guide piece is connected with the machine shell body and located in the containing cavity, an air guide channel is formed in the air guide piece, one end of the air guide channel communicates with the air outlet, and a flow inlet opened towards the radiator is formed in the other end of the air guide channel. Therefore, the radiating efficiency of the radiator can be improved, and the working stability of the air conditioner outdoor unit is improved.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning, and in particular to an outdoor unit for an air conditioner. Background Technology

[0002] As people's demands for the reliability and quality of air conditioning equipment increase, the heat dissipation efficiency of the air conditioning control box has become an indispensable key factor in ensuring the stable operation of the air conditioner. If the heat dissipation design of the control box is not ideal, it may lead to a decrease in the heat dissipation efficiency of electronic components, resulting in an excessively rapid temperature rise. This situation may not only cause the electronic components to reduce or limit their frequency, but may even lead to damage to the electronic components, thereby affecting the normal operation of the air conditioner. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes an outdoor unit for an air conditioner, in which airflow can be concentrated through the radiator, improving the utilization rate of air volume and increasing the stability of airflow, which is conducive to increasing the circulation efficiency of airflow, so that the radiator can come into contact with more airflow per unit time, thereby improving the heat dissipation efficiency of the radiator.

[0004] An outdoor air conditioner unit according to an embodiment of the present invention includes: a housing, the housing including: a housing body, wherein an exhaust duct is formed inside the housing; a top cover, the top cover being disposed on the top of the housing body, the top cover having an exhaust port communicating with the exhaust duct; the outdoor air conditioner unit further includes: an electrical control box, the electrical control box being installed on the housing body, the electrical control box, the housing body, and the top cover defining a receiving cavity, the receiving cavity having an air inlet and an air outlet, the air inlet and the air outlet being spaced apart along a first direction, the air outlet being disposed on the housing body and communicating with the exhaust duct; an electrical control board, the electrical control board being installed in the receiving cavity, and the electrical control board having a radiator; and an air guide, the air guide being connected to the housing body and located in the receiving cavity, the air guide having an air guide channel formed inside, one end of the air guide channel communicating with the air outlet and the other end having an inlet opening towards the radiator.

[0005] According to the embodiment of the present utility model, the outdoor unit of the air conditioner is provided with an air guide in the accommodating cavity, and the inlet of the air guide channel is open to the radiator, so that the airflow can be concentrated and flow through the radiator, which improves the utilization rate of air volume and can make the airflow flow stability higher, which is conducive to increasing the airflow circulation efficiency, so that the radiator can come into contact with more airflow per unit time, improving the heat dissipation efficiency of the radiator, thereby improving the working stability of the outdoor unit of the air conditioner.

[0006] According to some embodiments of the present invention, in the outdoor unit of an air conditioner, the first direction is the up-down direction, and the air outlet is located above the air inlet.

[0007] According to some embodiments of the present invention, in the outdoor unit of an air conditioner, the radiator is located between the air inlet and the air outlet in the first direction.

[0008] According to some embodiments of the present invention, in the first direction, the minimum distance between the air inlet and the radiator of the outdoor unit of the air conditioner is L, where L≥5mm and L≤50mm.

[0009] According to some embodiments of the present invention, in the outdoor unit of an air conditioner, the size of the radiator is H0 in the second direction, the size of the inlet is H1, H1 / H0≥0.5, H1 / H0≤1.5, and the first direction intersects the second direction.

[0010] According to some embodiments of the present invention, in the third direction, the size of the radiator is W0, the size of the inlet is W1, W1 / W0≥0.5, W1 / W0≤1.5, and the third direction intersects with the first direction and the second direction respectively.

[0011] According to some embodiments of the present invention, the outdoor unit of the air conditioner has multiple air inlets, which are spaced apart.

[0012] According to some embodiments of the present utility model, the outdoor unit of the air conditioner includes an electrical control box comprising an end plate and a cover. The end plate is fixedly connected to the housing body, the end plate protrudes from the side of the housing body facing the receiving cavity, and the air inlet is disposed on the end plate. The cover is detachably connected to the housing body.

[0013] According to some embodiments of the present invention, in the outdoor unit of an air conditioner, the electronic control board is connected to the housing body.

[0014] According to some embodiments of the present invention, the outdoor unit of the air conditioner further includes an insulating component connected to the side of the housing body facing the electrical control board; wherein the air guide is installed on the insulating component; or, the air guide and the insulating component are formed as an integral part.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of an outdoor unit of an air conditioner according to an embodiment of the present utility model;

[0018] Figure 2 This is an installation diagram of the electrical control box according to an embodiment of the present utility model;

[0019] Figure 3 This is an installation diagram of the electronic control board according to an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of a heat sink according to an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the air guide component according to an embodiment of the present utility model.

[0022] Figure label:

[0023] Air conditioner outdoor unit 100, first direction F1, second direction F2, third direction F3

[0024] Casing 1, Casing body 11, Top cover 12, External exhaust vent 121

[0025] Electrical control box 2, end plate 21, air inlet 211, box cover 22.

[0026] 3. Electrical control board, 31. Heat sink, 4. Air guide, 41. Inlet, 5. Insulating component, 6. Receiving cavity. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Hereinafter, with reference to the accompanying drawings, an outdoor unit 100 for an air conditioner according to an embodiment of the present invention will be described.

[0031] like Figures 1-5 As shown, the outdoor unit 100 of the air conditioner according to an embodiment of the present invention includes: a housing 1, an electrical control box 2, an electrical control board 3, and an air guide 4. The housing 1 includes: a housing body 11 and a top cover 12, and an exhaust duct is formed inside the housing 1. The top cover 12 is disposed on the top of the housing body 11, and the top cover 12 has an external exhaust port 121 communicating with the exhaust duct. The electrical control box 2 is installed on the housing body 11, and the electrical control box 2, the housing body 11, and the top cover 12 define a receiving cavity 6. The 6 has an air inlet 211 and an air outlet, which are spaced apart along the first direction F1. The air outlet is located on the housing body 11 and is connected to the exhaust duct. The electronic control board 3 is installed in the receiving cavity 6 and a heat sink 31 is provided on the electronic control board 3. The air guide 4 is connected to the housing body 11 and located in the receiving cavity 6. An air guide channel is formed in the air guide 4. One end of the air guide channel is connected to the air outlet and the other end forms an inlet 41 that opens towards the heat sink 31.

[0032] This allows the airflow to be concentrated through the radiator 31, improving the utilization rate of the air volume and increasing the stability of the airflow. This is beneficial for increasing the circulation efficiency of the airflow, so that the radiator 31 can come into contact with more airflow per unit time, improving the heat dissipation efficiency of the radiator 31 and thus improving the working stability of the outdoor unit 100 of the air conditioner.

[0033] First, such as Figures 1-3 As shown, the outdoor unit 100 of the air conditioner includes: a housing 1, which is installed in the outdoor space. The housing 1 includes a housing body 11 and a top cover 12. An exhaust duct is formed inside the housing body 11. The top cover 12 is located on the top of the housing body 11 and has an exhaust vent 121. The exhaust vent 121 is connected to the exhaust duct. The air conditioner can draw indoor air into the exhaust duct and discharge it to the outdoor space through the exhaust vent 121.

[0034] The outdoor unit 100 of the air conditioner also includes an electrical control box 2, an electrical control board 3, and an air guide 4. The electrical control box 2 is installed on the outer side wall of the housing body 11. The top cover 12 protrudes from the side of the housing body 11 facing the electrical control box 2. The top cover 12, the housing body 11, and the electrical control box 2 can jointly define a receiving cavity 6. The receiving cavity 6 has an air inlet 211 and an air outlet. The air inlet 211 and the air outlet are spaced apart along the first direction F1. The air outlet is located on the housing body 11 and is connected to the exhaust duct. The air inlet 211 is located on the electrical control box 2 and is connected to the outdoor space.

[0035] The control board 3 is installed inside the housing cavity 6, and the control board 3 is provided with a heat sink 31, which can be constructed as heat dissipation fins. The air guide 4 is connected to the housing body 11 and is located inside the housing cavity 6. An air guide channel is formed inside the air guide 4. One end of the air guide channel is connected to the air outlet, and the other end forms an inlet 41, which is open towards the heat sink 31.

[0036] Specifically, when the air conditioner starts operating, indoor air can flow into the exhaust duct and be discharged to the outdoor space through the exhaust port 121. At this time, a negative pressure is formed in the receiving cavity 6. Under the action of the negative pressure, outdoor air can flow into the receiving cavity 6 from the air inlet 211. The outdoor air in the receiving cavity 6 can flow through the radiator 31 and flow into the air guide channel from the inlet 41. When the outdoor air flows through the radiator 31, it can exchange heat with the radiator 31 to cool down the electronic control board 3. The outdoor air flowing into the air guide channel can flow along the air guide channel to flow into the exhaust duct from the air outlet. Then, the outdoor air can flow together with the indoor air in the exhaust duct to be discharged to the outdoor space from the exhaust port 121.

[0037] With the above settings, the air guide 4 can be used to guide the airflow so that the airflow can flow unidirectionally into the air outlet along the air guide channel. The inlet 41 is opposite to the radiator 31, so that the airflow can flow through the radiator 31 in a concentrated manner, which improves the utilization rate of air volume. In addition, the air guide 4 can make the flow stability of the airflow when it flows out of the air outlet higher, which is conducive to increasing the circulation efficiency of the airflow, so that the radiator 31 can come into contact with more airflow per unit time, improving the heat dissipation efficiency of the radiator 31, thereby reducing the operating temperature of the electronic control board 3.

[0038] According to the embodiment of the present utility model, the outdoor unit 100 of the air conditioner is provided with an air guide 4 in the accommodating cavity 6, and the inlet 41 of the air guide channel is open to the radiator 31, so that the airflow can be concentrated and flow through the radiator 31, which improves the utilization rate of air volume and can make the airflow flow stability higher, which is conducive to increasing the airflow circulation efficiency, so that the radiator 31 can come into contact with more airflow per unit time, improving the heat dissipation efficiency of the radiator 31, thereby improving the working stability of the outdoor unit 100 of the air conditioner.

[0039] In some embodiments of this utility model, such as Figures 1-3 As shown, the first direction F1 can be set to the up-down direction, and the air outlet can be positioned above the air inlet 211. It is understood that the heated gas will flow upward. By positioning the air outlet above the air inlet 211, after exchanging heat with the radiator 31 and heating up, the airflow can flow to the air outlet more quickly, which helps to increase the airflow circulation efficiency and thus improve the heat dissipation efficiency of the radiator 31.

[0040] In some embodiments of this utility model, such as Figure 3 As shown, in the first direction F1, the radiator 31 can be positioned between the air inlet 211 and the air outlet. This arrangement allows the air inlet 41 to face the air inlet 211, simplifying the airflow path, improving airflow circulation efficiency, and thus enhancing the heat dissipation efficiency of the radiator 31.

[0041] In some embodiments of this utility model, such as Figure 3 As shown, in the first direction F1, the minimum distance between the inlet 41 and the heat sink 31 is L, where L ≥ 5mm and L ≤ 50mm. That is, the minimum distance L between the inlet 41 and the heat sink 31 in the first direction F1 can be set to be greater than or equal to 5mm and less than or equal to 50mm, such as 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 40mm, 50mm, etc.

[0042] The above settings can prevent interference between the air guide 4 and the radiator 31 during installation, which helps to reduce the difficulty of installation and allows the airflow to flow more concentratedly through the radiator 31, thereby improving the heat dissipation efficiency of the radiator 31.

[0043] It should be emphasized that when the minimum distance L between the inlet 41 and the radiator 31 in the first direction F1 is 5mm, most of the airflow can flow through the radiator 31, which greatly improves the utilization rate of air volume; while when the minimum distance L between the inlet 41 and the radiator 31 in the first direction F1 is 50mm, it can effectively prevent interference between the air guide 4 and the radiator 31 due to processing errors and installation errors, and reduce the installation difficulty of the outdoor unit 100 of the air conditioner.

[0044] In some embodiments of this utility model, such as Figures 2-5 As shown, in the second direction F2, the size of the heat sink 31 is H0, the size of the inlet 41 is H1, H1 / H0≥0.5, H1 / H0≤1.5, and the first direction F1 intersects the second direction F2. For example, the first direction F1 can be set as the up-down direction, and the second direction F2 can be set as the left-right direction.

[0045] In other words, the ratio of the size H1 of the inlet 41 in the second direction F2 to the size H0 of the radiator 31 in the second direction F2 can be set to be greater than or equal to 0.5 and less than or equal to 1.5, such as 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, etc. This improves the airflow guiding effect of the air guide 4, which helps to improve the flow stability and concentration of the airflow, thereby increasing the heat dissipation efficiency of the radiator 31.

[0046] It should be emphasized that when the ratio of the size H1 of the inlet 41 in the second direction F2 to the size H0 of the radiator 31 in the second direction F2 is 0.5, the airflow is more concentrated, allowing more airflow to pass through the radiator 31, improving the utilization rate of air volume, and thus improving the heat dissipation efficiency of the radiator 31. When the ratio of the size H1 of the inlet 41 in the second direction F2 to the size H0 of the radiator 31 in the second direction F2 is 1.5, the size of the inlet 41 is larger, making it easier for the airflow in the receiving cavity 6 to flow into the inlet 41, improving the flow stability of the airflow, which is conducive to increasing the circulation efficiency of the airflow, and thus improving the heat dissipation efficiency of the radiator 31.

[0047] In some embodiments of this utility model, such as Figures 2-5As shown, on the third direction F3, the size of the heat sink 31 is W0, the size of the inlet 41 is W1, W1 / W0≥0.5, W1 / W0≤1.5, and the third direction F3 intersects with the first direction F1 and the second direction F2 respectively. For example, the first direction F1 can be set as the up-down direction, the second direction F2 can be set as the left-right direction, and the third direction F3 can be set as the front-back direction.

[0048] In other words, the ratio of the dimension W1 of the inlet 41 in the third direction F3 to the dimension W0 of the radiator 31 in the third direction F3 can be set to be greater than or equal to 0.5 and less than or equal to 1.5, such as 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, etc. This can improve the airflow guiding effect of the air guide 4, which is conducive to improving the flow stability and concentration of airflow, thereby improving the heat dissipation efficiency of the radiator 31.

[0049] It should be emphasized that when the ratio of the size W1 of the inlet 41 in the third direction F3 to the size W0 of the radiator 31 in the third direction F3 is 0.5, the airflow is more concentrated, allowing more airflow to pass through the radiator 31, improving the utilization rate of air volume, and thus improving the heat dissipation efficiency of the radiator 31. When the ratio of the size W1 of the inlet 41 in the third direction F3 to the size W0 of the radiator 31 in the third direction F3 is 1.5, the size of the inlet 41 is larger, making it easier for the airflow in the receiving cavity 6 to flow into the inlet 41, improving the flow stability of the airflow, which is conducive to increasing the circulation efficiency of the airflow, and thus improving the heat dissipation efficiency of the radiator 31.

[0050] In some embodiments of this utility model, the first direction F1, the second direction F2, and the third direction F3 can be set to be perpendicular to each other. Specifically, the first direction F1 can be set as the up-down direction, the second direction F2 as the left-right direction, and the third direction F3 as the front-back direction. This ensures the airflow guiding effect of the air guide 4.

[0051] In some embodiments of this utility model, such as Figure 2 As shown, multiple air inlets 211 can be arranged alternately. This improves the air intake efficiency of the receiving cavity 6 and reduces the size of a single air inlet 211, thus reducing the probability of debris entering the receiving cavity 6 and improving the operational stability of the outdoor unit 100 of the air conditioner.

[0052] In some embodiments of this utility model, such as Figures 1-2As shown, the electrical control box 2 includes an end plate 21 and a cover 22. The end plate 21 is fixedly connected to the housing body 11 and protrudes from the side of the housing body 11 facing the receiving cavity 6. The end plate 21 is disposed opposite to the top cover 12, and the air inlet 211 is disposed on the end plate 21. The cover 22 is detachably connected to the housing body 11. Exemplarily, the cover 22 and the housing body 11 can be connected by screws; or, the cover 22 and the housing body 11 can be connected by snap-fit. This utility model does not limit this.

[0053] Understandably, by placing the air inlet 211 on the end plate 21, the air inlet 211 can be axially aligned with the radiator 31, which helps to reduce airflow resistance and increase airflow velocity, thereby improving the heat dissipation efficiency of the radiator 31. In addition, by making the cover 22 removable from the casing body 11, the maintenance difficulty of the outdoor unit 100 can be reduced, and the practicality of the outdoor unit 100 can be improved.

[0054] In some embodiments of this utility model, such as Figure 3 As shown, the control board 3 can be connected to the housing body 11. This improves the installation stability of the control board 3, and the control board 3 can remain stationary during the disassembly and assembly of the cover 22, facilitating subsequent maintenance and improving the design rationality of the outdoor unit 100.

[0055] In some embodiments of this utility model, such as Figure 3 As shown, the electrical control box 2 of this embodiment further includes an insulating component 5. The insulating component 5 can be made of insulating materials such as plastic or rubber. The insulating component 5 is connected to the side of the housing body 11 facing the electrical control board 3. The insulating component 5 is used to insulate and separate the housing body 11 from the electrical control board 3 to prevent leakage of electricity from the outdoor unit 100 of the air conditioner. The air guide component 4 can be installed on the insulating component 5; or, the air guide component 4 and the insulating component 5 can be formed as a single unit.

[0056] The above setup enables integrated layout, which helps reduce the installation difficulty of the air guide 4, simplifies the structure, and reduces the processing difficulty and cost of the outdoor air conditioning unit 100.

[0057] This utility model also proposes an air conditioner.

[0058] An air conditioner according to an embodiment of the present invention includes: an outdoor unit 100 of an air conditioner according to any of the above embodiments.

[0059] According to the embodiment of the present invention, the outdoor unit 100 of the air conditioner has high operational stability, which is beneficial to improving the overall performance of the air conditioner.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0061] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An outdoor unit (100) for an air conditioner, comprising: Housing (1), said housing (1) comprising: The housing body (11) has an exhaust duct formed inside the housing (1); Top cover (12), the top cover (12) is located on the top of the housing body (11), the top cover (12) is provided with an external exhaust port (121) that communicates with the exhaust duct; The outdoor unit (100) of the air conditioner is characterized in that it further includes: An electrical control box (2) is installed on the housing body (11). The electrical control box (2), the housing body (11), and the top cover (12) define a receiving cavity (6). The receiving cavity (6) has an air inlet (211) and an air outlet. The air inlet (211) and the air outlet are spaced apart along a first direction (F1). The air outlet is located on the housing body (11) and communicates with the exhaust duct. An electronic control board (3) is installed in the receiving cavity (6), and a heat sink (31) is provided on the electronic control board (3); The air guide (4) is connected to the housing body (11) and located in the receiving cavity (6). An air guide channel is formed in the air guide (4). One end of the air guide channel is connected to the air outlet and the other end is formed with an inlet (41) that opens toward the radiator (31).

2. The outdoor unit (100) of the air conditioner according to claim 1, characterized in that, The first direction (F1) is the up-down direction, and the air outlet is located above the air inlet (211).

3. The outdoor unit (100) of the air conditioner according to claim 1, characterized in that, In the first direction (F1), the radiator (31) is located between the air inlet (211) and the air outlet.

4. The outdoor unit (100) of the air conditioner according to claim 1, characterized in that, In the first direction (F1), the minimum distance between the inlet (41) and the heat sink (31) is L, where L≥5mm and L≤50mm.

5. The outdoor unit (100) of the air conditioner according to claim 1, characterized in that, In the second direction (F2), the size of the heat sink (31) is H0, the size of the inlet (41) is H1, H1 / H0≥0.5, H1 / H0≤1.5, and the first direction (F1) intersects the second direction (F2).

6. The outdoor unit (100) of the air conditioner according to claim 5, characterized in that, On the third direction (F3), the size of the heat sink (31) is W0, the size of the inlet (41) is W1, W1 / W0≥0.5, W1 / W0≤1.5, and the third direction (F3) intersects with the first direction (F1) and the second direction (F2) respectively.

7. The outdoor unit (100) of the air conditioner according to claim 1, characterized in that, There are multiple air inlets (211), and the multiple air inlets (211) are arranged at intervals.

8. The outdoor unit (100) of an air conditioner according to any one of claims 1-7, characterized in that, The electrical control box (2) includes an end plate (21) and a cover (22). The end plate (21) is fixedly connected to the housing body (11). The end plate (21) protrudes from the side of the housing body (11) facing the receiving cavity (6), and the air inlet (211) is disposed on the end plate (21). The cover (22) is detachably connected to the housing body (11).

9. The outdoor unit (100) of the air conditioner according to claim 8, characterized in that, The electronic control board (3) is connected to the housing body (11).

10. The outdoor unit (100) of the air conditioner according to claim 9, characterized in that, The electrical control box (2) also includes an insulating component (5), which is connected to the side of the housing body (11) facing the electrical control board (3); The air guide (4) is installed on the insulating member (5); or the air guide (4) and the insulating member (5) are formed as one piece.

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