An electrical box and a heat pump unit

Abstract

The utility model discloses an electric appliance box and heat pump unit relates to electrical component technical field, wherein, electric appliance box includes: box body, the box body has the air hole and the wire hole, be equipped with the protective net on the air hole, be equipped with the wire sheath on the wire hole, be provided with the tie -down on the wire sheath, the utility model technical scheme, through installing the protective net on the air hole, can prevent insects from entering the electric appliance box inside while guaranteeing the air circulation. Through setting up the wire sheath at the wire hole, and setting up the tie -down on the wire sheath, can more closely bind together wire sheath and the cable through it, thereby filling the gap between wire sheath and cable, further guaranteeing the seal.

Description

Technical Field

[0001] This utility model relates to the field of electrical component technology, specifically to an electrical box and a heat pump unit. Background Technology

[0002] Electrical boxes used to install power components generally need to have heat dissipation holes to dissipate the heat generated by the power components in a timely manner.

[0003] For example, a heat pump unit with an insect-proof structure disclosed in Chinese patent document CN220103452U has heat dissipation holes on the side wall of the electrical box.

[0004] In the above solution, although insect-proof features are provided on the heat dissipation holes to prevent crawling insects from entering the electrical box, these features are not effective in preventing flying insects from entering.

[0005] In addition, electrical boxes usually have wire holes. When multiple wires are inserted into the wire holes, gaps can easily form between adjacent wires because the wires are round, and insects can easily enter through these gaps. Utility Model Content

[0006] In view of this, the present invention provides an electrical box and a heat pump unit to solve the problem that flying and crawling insects can easily enter the electrical box in the prior art.

[0007] This utility model provides an electrical box, including: a box body, the side of the box body having a vent hole, and a protective net covering the vent hole;

[0008] The side and / or bottom surfaces of the box have wire holes, and wire holes are fitted with wire sleeves. The wire sleeves include annular bodies and annular sleeves. The annular bodies are snapped into the wire holes, and the annular sleeves extend outward from the annular bodies along the axial direction. Cable ties are attached to the annular sleeves.

[0009] This utility model's technical solution, by installing a protective mesh on the ventilation hole, ensures air circulation while preventing insects from entering the electrical box. By installing a cable tie at the cable passage hole, the cable tie can be more tightly bound to the cable passing through it, thus filling the gap between the cable tie and the cable and further ensuring a tight seal.

[0010] Optionally, the housing contains a circuit board with power components. The housing also has a mounting slot for embedding the circuit board, and the mounting slot contains an adhesive layer covering the circuit board. Because the adhesive layer has an extremely low water absorption rate (<0.1%), compared to the PCB board's high water absorption rate of up to 1.5%, the amount of moisture absorbed by the adhesive layer is minimal, greatly reducing the possibility of moisture penetrating the PCB board. Even in high humidity environments or with occasional contact with small amounts of water, the adhesive layer can maintain a low water absorption state for extended periods, effectively preventing moisture from damaging electronic components and circuits on the circuit board, avoiding short circuits, corrosion, and other malfunctions caused by moisture, and ensuring stable operation of the circuit board.

[0011] Optionally, the adhesive layer may be made of silicone. Even at a low temperature of -40°C, silicone can still maintain its elasticity. The low elastic modulus of silicone enables it to effectively absorb vibration energy, with an attenuation rate of more than 60%, making it particularly suitable for high-frequency vibration scenarios in heat pump units.

[0012] Optionally, the thickness of the adhesive layer is ≥2mm.

[0013] Optionally, heat dissipation fins are connected to the bottom surface of the circuit board, and the heat dissipation fins extend downward from the housing. The heat dissipation fins improve the heat dissipation of the circuit board.

[0014] Optionally, a thermally conductive filler is added to the adhesive layer. Adding the thermally conductive filler significantly improves the thermal conductivity of the adhesive layer. When heat sources such as power components on the circuit board generate heat, the heat can be transferred away more quickly through the adhesive layer.

[0015] Optionally, the thermally conductive filler includes: alumina and boron nitride.

[0016] Alumina has a high thermal conductivity, typically around 20-30 W / (m·K). When added as a thermally conductive filler to an adhesive layer, it can create an effective heat conduction path within the layer.

[0017] Boron nitride has extremely high thermal conductivity, especially hexagonal boron nitride, which can reach 300-400 W / (m·K) or even higher. Adding boron nitride to the adhesive layer can greatly improve the overall thermal conductivity of the adhesive layer, allowing heat to be transferred away from the heating element at a faster rate.

[0018] Optionally, the outermost layer of the protective net is made of stainless steel. Stainless steel protective nets provide robust protection against external physical impacts and corrosion, ensuring the structural stability of the protective net in harsh environments.

[0019] Optionally, the mesh size of the protective net is between 1.5-3mm. This design effectively blocks larger common pests, such as flies and moths, preventing them from entering the equipment through the mesh. Simultaneously, the 1.5-3mm mesh size provides better ventilation, facilitating airflow within electrical boxes and other equipment, aiding in heat dissipation, and preventing performance degradation or malfunction due to heat buildup.

[0020] Optionally, the vents include at least a first vent and a second vent, wherein the first vent and the second vent are located on two symmetrical sides of the housing. This symmetrical arrangement enhances internal airflow and improves heat dissipation.

[0021] Optionally, the first vent is located on the front side of the housing, and the second vent is located on the rear side of the housing. With this configuration, after the electrical box is installed on the heat pump unit, the front side of the housing is closer to the fan cavity. When the airflow generated by the fan helps dissipate heat from the electrical box, the airflow resistance is lower, and the airflow speed is higher.

[0022] Optionally, the cable sheath is made of nitrile rubber, and the cable tie is made of nylon. The nitrile rubber has a hardness of 50±5A and a flame retardant rating of VO. This hardness provides good flexibility during installation. It is neither too stiff to be difficult to bend and install into the cable hole, nor too soft to lose its shape after installation, ensuring the cable sheath can be smoothly installed into the cable hole and securely fixed, while providing stable support and protection for the cable. The VO flame retardant rating gives the nitrile rubber good flame-retardant properties when exposed to a fire source.

[0023] The nylon material of cable ties has good tensile strength and corrosion resistance. By threading the cable tie through the annular sleeve and then tightening it, the annular sleeve can be tightly closed to form a sealed protective area. In electrical boxes of some mechanical equipment with high vibration, cable ties can ensure that the cable sheath will not loosen or fall off under long-term vibration, maintaining a good insect-proof effect. On the other hand, the annular sleeve at the end is also well protected against insects by being tied with cable ties.

[0024] This utility model also provides a heat pump unit, including:

[0025] A housing, wherein the housing contains a fan chamber and a compressor chamber;

[0026] The electrical box in any one of the above solutions is disposed between the fan chamber and the compressor chamber. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 An internal structural perspective view of an electrical box provided for an embodiment of this utility model;

[0029] Figure 2 for Figure 1 A three-dimensional diagram viewed from below;

[0030] Figure 3 for Figure 2 A perspective view of the wire guide sleeve shown in the figure;

[0031] Figure 4 for Figure 1 A 3D view of the circuit board and mounting slot;

[0032] Figure 5 for Figure 4 A 3D view of the mounting slot;

[0033] Figure 6 This is a perspective view of the internal structure of a heat pump unit provided in an embodiment of the present utility model.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Box body; 2. First vent; 3. Second vent; 4. Cable guide sleeve; 5. Circuit board; 6. Mounting slot; 7. Annular sleeve; 8. Housing; 9. Fan cavity; 10. Press cavity; 11. Heat sink fins; 12. Annular body. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] 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 direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0040] like Figure 1 , Figure 2 As shown, this is a specific implementation of the electrical box provided in this embodiment, including: a box body 1, the side of the box body 1 has a ventilation hole, and a protective net is provided on the ventilation hole. By setting the protective net, air circulation can be ensured while preventing insects from entering the electrical box.

[0041] like Figure 2 , Figure 3 As shown, the side and / or bottom surface of the housing 1 are provided with cable passage holes, and a cable passage sleeve 4 passes through the cable passage holes. The cable passage sleeve 4 includes an annular body 12 and an annular sleeve 7. The annular body 12 is snapped into the cable passage hole, and the annular sleeve 7 extends axially outward from the annular body 12. Cable ties are attached to the annular sleeve 7. This arrangement allows the cable passage sleeve 4 to be more tightly bound to the cable passing through it, thereby filling the gap between the cable passage sleeve 4 and the cable and further ensuring a seal.

[0042] Specifically, the material of the cable guide sleeve 4 can be nitrile rubber. Of course, in some alternative embodiments, the material of the cable guide sleeve 4 can also be other materials, such as plastic.

[0043] The cable tie can be made of nylon. Nylon has good tensile strength and corrosion resistance. By passing the cable tie through the annular sleeve 7 and then tightening it, the annular sleeve 7 can be tightly closed together to form a sealed protective area. In electrical boxes of some mechanical equipment with high vibration, the cable tie can ensure that the cable sheath 4 will not loosen or fall off under long-term vibration, and always maintain a good insect-proof effect. On the other hand, the annular sleeve 7 at the tail end is also well protected against insects by the cable tie. Of course, the above description is not limiting. In some alternative embodiments, the cable tie can also be made of other materials, such as metal.

[0044] It should be noted that, in some embodiments, the outermost layer of the protective net may be made of stainless steel. Stainless steel protective nets provide robust protection against external physical impacts and corrosion, ensuring the structural stability of the protective net in harsh environments. Alternatively, in some alternative embodiments, the protective net may be made of other materials, such as other metals or polymer materials.

[0045] In some embodiments, the mesh openings of the protective net are between 1.5 and 3 mm. This design effectively blocks larger common pests, such as flies and moths, preventing them from entering the equipment through the mesh. Simultaneously, the 1.5-3 mm mesh openings provide better ventilation, facilitating airflow within electrical boxes and other equipment, aiding in heat dissipation, and preventing performance degradation or malfunction due to heat buildup. Of course, the above description is not limiting; in some alternative embodiments, the mesh openings of the protective net can also use other apertures, such as 1 mm or 4 mm.

[0046] like Figure 1 , Figure 4 and Figure 5 As shown, the box 1 contains a circuit board 5, the circuit board 5 has power components, the box 1 has a mounting groove 6 for embedding the circuit board 5, and the mounting groove 6 has an adhesive layer covering the circuit board 5.

[0047] Specifically, in some embodiments, the adhesive layer is made of silicone, and the thickness of the adhesive layer is ≥2mm. During installation, after the circuit board 5 is embedded into the mounting groove 6 inside the housing 1, the silicone adhesive layer is evenly applied into the mounting groove 6, so that the adhesive layer covers the entire circuit board 5. Because the water absorption rate of the adhesive layer is extremely low, only <0.1%, compared to the PCB board's water absorption rate of up to 1.5%, the amount of water vapor absorbed by the adhesive layer is minimal, greatly reducing the possibility of water vapor penetrating into the PCB board. Even in high humidity environments or when occasionally exposed to small amounts of water, the adhesive layer can maintain a low water absorption state for a long time, effectively preventing water vapor from damaging the electronic components and circuits on the circuit board 5, avoiding short circuits, corrosion, and other malfunctions caused by water vapor, and ensuring the stable operation of the circuit board 5.

[0048] In some embodiments, thermally conductive fillers may be added to the adhesive layer. Adding thermally conductive fillers significantly improves the thermal conductivity of the adhesive layer. When heat sources such as power components on the circuit board 5 generate heat, the heat can be transferred away more quickly through the adhesive layer.

[0049] Specifically, the thermally conductive filler may include alumina and boron nitride. Alumina, in particular, has a high thermal conductivity, typically around 20-30 W / (m·K). When added to the adhesive layer as a thermally conductive filler, it can create an effective heat conduction path within the adhesive layer.

[0050] Boron nitride has extremely high thermal conductivity, especially hexagonal boron nitride, which can reach 300-400 W / (m·K) or even higher. Adding boron nitride to the adhesive layer can greatly improve the overall thermal conductivity of the adhesive layer, allowing heat to be transferred away from the heating element at a faster rate.

[0051] Of course, the above description is not limiting. In some alternative embodiments, the thermally conductive filler may also include other materials, such as magnesium oxide, beryllium oxide, copper powder, silver powder, graphene, carbon nanotubes, etc.

[0052] like Figure 1 As shown, in this embodiment, the ventilation holes on the box body 1 include at least a first ventilation hole 2 and a second ventilation hole 3, which are located on two symmetrical sides of the box body 1. That is, they can be located on the front and rear sides, or on the left and right sides, respectively. This symmetrical arrangement enhances internal airflow and improves heat dissipation.

[0053] Specifically, in this embodiment, the first vent 2 is located on the front side of the housing 1, and the second vent 3 is located on the rear side of the housing 1. With this arrangement, after the electrical box is installed on the heat pump unit, the front side of the housing 1 is closer to the fan chamber 9. When the airflow generated by the fan helps dissipate heat from the electrical box, the airflow resistance is lower and the wind speed is higher.

[0054] like Figure 2 , Figure 4 As shown, in this embodiment, heat dissipation fins 11 are connected to the bottom surface of the circuit board 5, and the heat dissipation fins 11 extend downward from the housing 1. Specifically, the heat dissipation fins 11 can be made of spaced-apart metal plates. By setting the heat dissipation fins 11, the heat dissipation of the circuit board 5 can be improved.

[0055] The insect-proof ventilation principle of the electrical box provided in this embodiment is as follows: the outermost layer of the protective mesh on the ventilation holes is made of stainless steel, with mesh gaps between 1.5-3mm. The stainless steel material provides robust protection, resisting physical impact and corrosion, and ensuring structural stability. The specific mesh size effectively blocks common pests from entering while ensuring good ventilation, facilitating air circulation and heat dissipation inside the electrical box.

[0056] The cable sealing principle of the electrical box provided in this embodiment is as follows: The cable sheath 4 consists of an annular body 12 that snaps onto the cable hole and an annular sleeve 7 that extends outward along the axial direction. Cable ties are attached to the annular sleeve 7. The cable sheath 4 tightly wraps around the wire, and the annular sleeve 7 covers the edge of the cable hole. After the cable ties are tightened, the annular sleeve 7 is tightly bound to the wire, filling the gap and forming a seamless barrier to prevent insects from entering the electrical box through the gap between the wire and the cable hole.

[0057] The circuit board 5 protection principle of the electrical box provided in this embodiment is as follows: An adhesive layer within the mounting groove 6 of the box body 1 covers the circuit board 5. The adhesive layer material is silicone, with a thickness ≥2mm and an extremely low water absorption rate (<0.1%). Compared to PCB board material (water absorption rate 1.5%), this greatly reduces the possibility of moisture penetration into the PCB board, preventing electronic component failures caused by moisture. Silicone also possesses characteristics such as extreme temperature adaptability, vibration resistance and stress release, electrical safety, and weather resistance. Furthermore, thermally conductive fillers (such as alumina, boron nitride, etc.) can be added to the adhesive layer to improve its thermal conductivity, allowing the heat generated by the heating elements on the circuit board 5 to be quickly dissipated.

[0058] On the other hand, this embodiment also provides a heat pump unit, such as Figure 6 As shown, it includes: a housing 8, which has a fan chamber 9 and a compressor chamber 10 inside. An electrical box as described in the above embodiment is disposed between the fan chamber 9 and the compressor chamber 10.

[0059] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. An electrical box, characterized in that, include: The box body (1) has ventilation holes on its side, and a protective net is provided over the ventilation holes; The side and / or bottom surfaces of the box body (1) have wire holes, and wire sleeves (4) are provided on the wire holes. The wire sleeves (4) include an annular body (12) and an annular sleeve (7). The annular body (12) is snapped into the wire hole. The annular sleeve (7) extends outward along the axial direction from the annular body (12). Cable ties are tied to the annular sleeve (7). The box (1) also has a circuit board (5) inside, the circuit board (5) has power components, the box (1) has a mounting groove (6) for embedding the circuit board (5), and the mounting groove (6) has an adhesive layer covering the circuit board (5). The bottom surface of the circuit board (5) is connected to heat dissipation fins (11), which extend downwards from the box body (1).

2. The electrical box according to claim 1, characterized in that, The thickness of the adhesive layer is ≥2mm.

3. The electrical box according to claim 1, characterized in that, Thermally conductive filler is added to the adhesive layer.

4. The electrical box according to claim 3, characterized in that, The thermally conductive filler includes: alumina and boron nitride.

5. The electrical box according to any one of claims 1-4, characterized in that, The outermost layer of the protective net is made of stainless steel.

6. The electrical box according to any one of claims 1-4, characterized in that, The mesh size of the protective net is between 1.5 and 3 mm.

7. The electrical box according to any one of claims 1-4, characterized in that, The ventilation holes include at least a first ventilation hole (2) and a second ventilation hole (3), wherein the first ventilation hole (2) and the second ventilation hole (3) are located on two symmetrical sides of the box body (1).

8. The electrical box according to claim 7, characterized in that, The first vent (2) is located on the front side of the box body (1), and the second vent (3) is located on the rear side of the box body (1).

9. A heat pump unit, characterized in that, include: The housing (8) has a fan chamber (9) and a compressor chamber (10) inside. The electrical box according to any one of claims 1-8 is disposed between the fan chamber (9) and the compressor chamber (10).

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