An electrical box and heat pump

Abstract

The utility model discloses an electric appliance box seat and heat pump, include: first mounting plate, horizontal setting, and top side forms the first installation area that can be used to install variable frequency drive unit, second mounting plate, vertical connection in the downside of first mounting plate, two opposite sides of second mounting plate form the horizontal distribution's second installation area and the empty area, and the second installation area can be used to install main control unit, wherein, first mounting plate will first installation area with second installation area is isolated up and down, utilize first mounting plate and isolate, effectively solved the electromagnetic interference problem between variable frequency drive module and main control unit in electric appliance box, this has guaranteed that main control unit can accurately receive and handle the signal from various sensors, has improved heat pump system control accuracy and stability.

Description

Technical Field

[0001] This application relates to the technical field of heat pump equipment, and more particularly to an electrical box holder and a heat pump. Background Technology

[0002] In the current field of variable frequency heat pump equipment technology, the electrical box, as one of the core components, undertakes the important task of integrating multiple key functional modules. Typically, the electrical box of a variable frequency heat pump equipment integrates various types of electronic modules, such as a variable frequency drive module and a main control module.

[0003] However, existing designs integrate multiple modules into a single electrical box. While this integrated design improves the compactness and ease of installation to some extent, it also introduces a significant problem—electromagnetic interference between the modules. Due to the relatively limited space within the electrical box and the close proximity of the modules, the high-frequency electromagnetic radiation generated by the variable frequency drive module can easily interfere with the normal operation of other modules, especially the main control module. This electromagnetic interference can cause signal deviations or distortions received by the main control module, thereby affecting its control accuracy and stability of the entire heat pump system. Therefore, solving the problem of electromagnetic interference between modules within the electrical box of variable frequency heat pump equipment has become a pressing technical challenge in this field. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide an electrical box holder and a heat pump that can solve the above-mentioned problems existing in the prior art.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] On the one hand, an electrical enclosure is provided, which can be installed inside the main unit housing of a heat pump for mounting electrical units; including:

[0007] The first mounting plate is horizontally positioned, and its top side forms a first mounting area that can be used to install the frequency converter drive unit;

[0008] The second mounting plate is vertically connected to the lower side of the first mounting plate. The two opposite sides of the second mounting plate form a horizontally distributed second mounting area and a clearance area. The second mounting area can be used to install the main control unit.

[0009] The first mounting plate isolates the first mounting area from the second mounting area vertically.

[0010] Optionally, a third mounting plate is also included, which is connected to one side of the first mounting plate and extends upward. The side of the third mounting plate facing the first mounting area forms a third mounting area, which can be used to install the communication unit.

[0011] Optionally, the top side of the third mounting plate is provided with a horizontal folded edge, which is used to connect to the top wall panel of the main unit housing.

[0012] Optionally, a fourth mounting plate is also included, which is connected to one side of the first mounting plate and extends downward, and one side of the fourth mounting plate forms a fourth mounting area, which can be used to install wiring units.

[0013] Optionally, the bottom side of the fourth mounting plate is provided with a first L-shaped connecting plate located below the fourth mounting area. The first L-shaped connecting plate includes a first support plate and a first fixing plate that form an angle with each other. The first support plate is connected to the fourth mounting plate, and the first fixing plate is connected to the side of the first support plate away from the fourth mounting plate. The first fixing plate is used to connect to the side wall panel of the main unit chassis.

[0014] Optionally, the first mounting plate, the third mounting plate, and the fourth mounting plate are an integral sheet metal structure, with the third mounting plate and the fourth mounting plate respectively bent and formed on two opposite sides of the first mounting plate.

[0015] Optionally, the second mounting plate has a second L-shaped connecting plate on at least one side. The second L-shaped connecting plate includes a second support plate and a second fixing plate that are at an angle to each other. The second support plate is connected to the second mounting plate, and the second fixing plate is connected to the side of the second support plate away from the second mounting plate. The second fixing plate is used to connect to the side wall panel of the main unit housing.

[0016] Optionally, the first mounting plate has a perforated hole in the middle, which is used to avoid the heat dissipation unit connected to the bottom of the frequency converter drive unit.

[0017] Optionally, the second mounting plate has a clearance opening on its top side, and the top of the second mounting area has an isolation plate. The isolation plate connects the first mounting plate and the second mounting plate. The isolation plate has a receiving groove on the side facing the clearance opening that is separated from the second mounting area. The receiving groove can accommodate part of the structure of the heat dissipation unit.

[0018] On the other hand, a heat pump is provided, comprising:

[0019] Computer chassis;

[0020] The aforementioned electrical box is installed inside the main unit chassis;

[0021] A frequency converter drive unit is mounted on the first mounting plate;

[0022] The main control unit is installed on the second mounting plate.

[0023] The beneficial effects of this application are as follows:

[0024] 1) Improved Electromagnetic Compatibility: By installing the inverter drive module and the main control module in the first and second mounting areas respectively, and isolating them with a metal first mounting plate, the electromagnetic interference problem between modules within the electrical box is effectively solved. This ensures that the main control unit can accurately receive and process signals from various sensors, improving the control accuracy and stability of the heat pump system. For example, it avoids misinterpretation of temperature sensor signals by the main control unit due to electromagnetic interference, thus ensuring that the heat pump system can accurately adjust its cooling or heating capacity according to the actual temperature conditions.

[0025] 2) Rational space utilization: The design of the electrical box makes full use of the space inside the main unit chassis. It adopts a layout with a flat top and vertical bottom. Its installation structure is combined with the main unit chassis wall panel, which can rationally arrange electrical units in a limited space. At the same time, it can create a larger clearance area inside the main unit chassis to meet the installation needs of other components, making the layout inside the entire main unit chassis more compact and orderly, and improving the overall integration of the equipment. Attached Figure Description

[0026] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a schematic diagram of the structure of the electrical box and its internal electronic module as described in the embodiments of this application;

[0028] Figure 2 for Figure 1 A structural schematic diagram from another perspective of the structure shown;

[0029] Figure 3 This is a schematic diagram of the electrical box holder from one perspective of an embodiment of this application;

[0030] Figure 4 This is a structural schematic diagram of the electrical box holder described in an embodiment of this application from another perspective;

[0031] Figure 5 This is one of the exploded schematic diagrams of the electrical box holder described in the embodiments of this application;

[0032] Figure 6 This is a second exploded view of the electrical box holder described in the embodiments of this application;

[0033] Figure 7 This is the third exploded view of the electrical box holder described in the embodiments of this application.

[0034] In the picture:

[0035] 1. First mounting plate; 11. Hole; 2. Second mounting plate; 21. Second L-shaped connecting plate; 211. Second support plate; 212. Second fixing plate; 22. Clearance opening; 3. Third mounting plate; 31. Folded edge; 4. Fourth mounting plate; 41. First L-shaped connecting plate; 411. First support plate; 412. First fixing plate; 5. Isolation plate; 51. Receiving groove; 61. Variable frequency drive unit; 62. Main control unit; 63. Communication unit; 64. AC contactor; 65. Wiring unit; 66. Heat dissipation unit. Detailed Implementation

[0036] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the current field of variable frequency heat pump equipment technology, the electrical box, as one of the core components, undertakes the important task of integrating multiple key functional modules. Typically, the electrical box of a variable frequency heat pump equipment integrates various types of electronic modules, such as a variable frequency drive module and a main control module.

[0040] The variable frequency drive module is mainly responsible for controlling the operating frequency of the compressor. By changing the power supply frequency, it adjusts the compressor speed, thereby achieving precise control of the cooling or heating capacity of the heat pump system. During operation, it generates high-frequency switching signals and changing currents. These signals and currents carry rich harmonic components and have strong electromagnetic radiation characteristics.

[0041] The main control module is like the "brain" of the variable frequency heat pump equipment. It is responsible for receiving signals from various sensors, such as temperature sensors and pressure sensors, processing and analyzing these signals according to preset algorithms and logic, and then issuing control commands to the variable frequency drive module and other execution components to coordinate the normal operation of the entire heat pump system. When the main control module is working, its internal circuits will continuously process data and transmit signals, and will also generate certain electromagnetic signals.

[0042] However, existing designs integrate multiple modules into a single electrical box. While this integrated design improves the compactness and ease of installation to some extent, it also introduces a significant problem—electromagnetic interference between the modules. Due to the relatively limited space within the electrical box and the close proximity of the modules, the high-frequency electromagnetic radiation generated by the variable frequency drive module can easily interfere with the normal operation of other modules, especially the main control module. This electromagnetic interference can cause signal deviations or distortions received by the main control module, thereby affecting its control accuracy and stability of the entire heat pump system. Therefore, solving the problem of electromagnetic interference between modules within the electrical box of variable frequency heat pump equipment has become a pressing technical challenge in this field.

[0043] To overcome the above technical problems, this embodiment provides an electrical enclosure that can be installed inside the main unit housing of a heat pump for mounting electrical units. When applied to a heat pump main unit, the electrical enclosure of this embodiment can provide mounting support and protection for the electrical units (including but not limited to the frequency converter drive unit 61, main control unit 62, communication unit 63, filter unit, fan drive unit, wiring unit 65, etc.), enabling each electrical unit to work stably and collaboratively. Specifically, during installation, the electrical enclosure is installed inside the main unit housing, forming a certain space with the various wall panels of the main unit housing (such as the top wall panel, side wall panel, or bottom wall panel) to provide isolation and protection for the electrical units.

[0044] For ease of understanding, the installation structure of the electrical box socket is explained here: The main unit chassis to which the electrical box socket is used includes a top wall panel, a bottom wall panel, and side wall panels, wherein the side wall panels include a front wall panel, a left wall panel, and a right wall panel; for example, when the electrical box socket is installed in the upper left corner area of ​​the main unit chassis, it connects the front wall panel, the rear wall panel, the left wall panel, and the top wall panel; when the electrical box socket is installed in the upper right corner area of ​​the main unit chassis, it connects the front wall panel, the rear wall panel, the right wall panel, and the top wall panel.

[0045] In the specific structure of the electrical box holder in this embodiment, as follows: Figure 1-4 As shown, it includes at least a first mounting plate 1 and a second mounting plate 2. The first mounting plate 1 is horizontally arranged, and a first mounting area for mounting the frequency converter drive unit 61 is formed on its top side. The second mounting plate 2 is vertically connected to the lower side of the first mounting plate 1. A second mounting area and a clearance area are horizontally distributed on the two opposite sides of the second mounting plate 2. The second mounting area can be used to mount the main control unit 62. The first mounting plate 1 isolates the first mounting area from the second mounting area vertically.

[0046] The electrical box is made of metal. The first mounting plate 1 is set horizontally, which isolates the first mounting area and the second mounting area vertically. The frequency converter drive unit 61 and the main control unit 62 are installed in the first mounting area and the second mounting area respectively, which can achieve physical isolation and electromagnetic shielding between the two, effectively avoiding the problem of electromagnetic interference between them.

[0047] Taking the installation of the electrical box in the upper left corner of the main unit housing as an example, the first mounting plate 1 is horizontally set, and its edge connects to the front and rear walls of the main unit housing. A distance is maintained between its top and the top wall to form a first mounting area. The frequency converter drive unit 61 is mounted on the first mounting plate 1. The second mounting plate 2 is vertically connected to the lower side of the first mounting plate 1, forming a second mounting area between the second mounting plate 2 and the front / rear walls, and a clearance area between the second mounting plate 2 and the rear / front walls. The main control unit 62 is mounted on the side of the second mounting plate 2 within the second mounting area. The clearance area can be used to avoid other components inside the main unit housing (such as compressors, necessary pipes, valves, or sensors). Since the main control unit 62 is a circuit board with a relatively small thickness, the space reserved in the second mounting area can be small, while the space reserved in the clearance area can be large, to minimize the impact on the layout of other components inside the main unit housing.

[0048] In summary, the electrical box holder provided in this embodiment can achieve at least the following beneficial effects:

[0049] 1) Improved Electromagnetic Compatibility: By installing the frequency converter drive module and the main control unit in the first and second mounting areas respectively, and isolating them with a metal first mounting plate 1, the electromagnetic interference problem between modules within the electrical box is effectively solved. This ensures that the main control unit can accurately receive and process signals from various sensors, improving the control accuracy and stability of the heat pump system. For example, it avoids misinterpretation of temperature sensor signals by the main control unit due to electromagnetic interference, thereby ensuring that the heat pump system can accurately adjust its cooling or heating capacity according to the actual temperature conditions.

[0050] 2) Rational space utilization: The design of the electrical box makes full use of the space inside the main unit chassis. It adopts a layout with a flat top and vertical bottom. Its installation structure is combined with the main unit chassis wall panel, which can rationally arrange electrical units in a limited space. At the same time, it can create a larger clearance area inside the main unit chassis to meet the installation needs of other components, making the layout inside the entire main unit chassis more compact and orderly, and improving the overall integration of the equipment.

[0051] In one embodiment, the electrical unit includes a filter unit and a fan drive unit, which are integrated with the frequency converter drive unit 61. The entire integrated module is mounted on the first mounting plate 1.

[0052] In one embodiment, combined with Figure 1 It also includes a third mounting plate 3, which is connected to one side of the first mounting plate 1 and extends upward. The side of the third mounting plate 3 facing the first mounting area forms a third mounting area, which can be used to install the communication unit 63.

[0053] If the electrical box is installed in the upper left corner of the main unit chassis, then the third mounting plate 3 is connected to the right side of the first mounting plate 1 and extends upward to connect to the top wall of the main unit chassis. At this time, the third mounting plate 3 is set opposite to the left wall of the main unit chassis, so as to achieve isolation and protection from the right side of the first mounting area and avoid other components in the main unit chassis from affecting the electrical units in the first mounting area.

[0054] In addition to providing isolation, the third mounting plate 3 can also provide mounting support for the communication unit 63, making full use of the mounting space on the electrical box and improving compactness while avoiding mutual interference between components.

[0055] In one embodiment, an AC contactor 64 is also mounted on the third mounting plate 3.

[0056] In one embodiment, the top side of the third mounting plate 3 is provided with a horizontal folded edge 31, which is used to connect to the top wall panel of the main unit chassis.

[0057] The folded edge 31 on the top side of the third mounting plate 3 is connected to the top wall panel of the main unit chassis, increasing the connection area and making the connection between the third mounting plate 3 and the main unit chassis more secure. This connection method enhances the installation stability of the electrical box in the main unit chassis and reduces the possibility of the electrical box loosening due to vibration or other external forces during equipment operation.

[0058] Preferably, a threaded hole is provided on the folded edge 31, and screws are used to connect the folded edge 31 to the top wall panel of the main unit housing.

[0059] In one embodiment, reference is made to Figure 1It also includes a fourth mounting plate 4, which is connected to one side of the first mounting plate 1 and extends downward. One side of the fourth mounting plate 4 forms a fourth mounting area, which can be used to install the wiring unit 65.

[0060] The wiring unit 65 is used to establish a connection between the electrical unit and the external line to realize the transmission of current and electrical signals.

[0061] Specifically, a wiring window is typically provided on one side wall of the main unit chassis to facilitate the wiring of external lines to electrical units. Taking the electrical box socket installed in the upper left corner of the main unit chassis as an example, a wiring window is correspondingly provided on the left wall panel of the main unit chassis. After installation, the fourth mounting plate 4 is kept at a distance from the left wall panel to form a fourth mounting area. The wiring unit 65 is installed on the fourth mounting plate 4 within the fourth mounting area, so that the wiring unit 65 can directly face the wiring window.

[0062] The fourth mounting plate 4 provides a stable mounting platform for the wiring unit 65. Installing the wiring unit 65 within the fourth mounting area and positioning it directly facing the wiring window greatly simplifies wiring operations. During installation or maintenance, technicians can more easily connect external wiring to the wiring unit 65, reducing wiring complexity and time costs.

[0063] In one embodiment, a first L-shaped connecting plate 41 located below the fourth mounting area is provided on the bottom side of the fourth mounting plate 4. The first L-shaped connecting plate 41 includes a first support plate 411 and a first fixing plate 412 forming an angle between them. The first support plate 411 is connected to the fourth mounting plate 4, and the first fixing plate 412 is connected to the side of the first support plate 411 away from the fourth mounting plate 4. The first fixing plate 412 is used to connect to the side wall panel of the main unit chassis.

[0064] Similarly, taking the electrical box holder in this embodiment as an example installed in the upper left corner of the main unit box, in the structure after installation, the first support plate 411 is connected to the bottom side of the fourth mounting plate 4 and extends to the left, the first fixing plate 412 is connected to the left side of the first support plate 411, and the first fixing plate 412 is vertically set so that it can fit and be connected to the surface of the left wall panel.

[0065] The first L-shaped connecting plate 41 provides additional support and fixing points for the fourth mounting plate 4. Through the connection between the first support plate 411 and the fourth mounting plate 4, and the connection between the first fixing plate 412 and the left wall panel of the main unit, the fourth mounting plate 4 is more stable when bearing the weight of the wiring unit 65 and the tension of the external lines, reducing the risk of loosening due to vibration or external force.

[0066] Preferably, the first fixing plate 412 is provided with threaded holes, and screws are used to connect the first fixing plate 412 to the side wall panel of the main unit housing.

[0067] In one embodiment, the first mounting plate 1, the third mounting plate 3, and the fourth mounting plate 4 are an integral sheet metal structure, with the third mounting plate 3 and the fourth mounting plate 4 respectively bent and formed on two opposite sides of the first mounting plate 1.

[0068] The integrated sheet metal structure eliminates stability issues caused by loose connections between components, improving the reliability of the electrical enclosure during equipment operation. The strength and rigidity of the sheet metal material ensure that the electrical enclosure can withstand various mechanical stresses, such as vibration and impact. The integrated design reduces the number of parts, lowers the complexity of production and assembly, and thus reduces production costs. Due to its simple structure and good overall integrity, the assembly process is simpler, reducing manual operation and assembly time.

[0069] In one embodiment, the second mounting plate 2 has a second L-shaped connecting plate 21 on at least one side. The second L-shaped connecting plate 21 includes a second support plate 211 and a second fixing plate 212 that are angled together. The second support plate 211 is connected to the second mounting plate 2, and the second fixing plate 212 is connected to the side of the second support plate 211 away from the second mounting plate 2. The second fixing plate 212 is used to connect to the side wall panel of the main unit housing.

[0070] Similarly, the second L-shaped connecting plate 21 provides additional support and fixing points for the second mounting plate 2, effectively enhancing the installation stability of the electrical box. Through its connection with the side wall panel of the main unit housing, the second L-shaped connecting plate 21 can share the force on the electrical box, reducing the risk of loosening due to vibration or other external forces, and ensuring the reliability and safety of the electrical box during equipment operation.

[0071] Preferably, the second fixing plate 212 is provided with threaded holes, and screws are used to connect the second fixing plate 212 to the side wall panel of the main unit housing.

[0072] In one embodiment, combined with Figure 2 and Figure 3 The first mounting plate 1 has a hollow hole 11 in the middle, which is used to avoid the heat dissipation unit 66 connected to the bottom of the frequency conversion drive unit 61.

[0073] The heat dissipation unit 66 can be, but is not limited to, water cooling, refrigerant cooling, air cooling, etc., which can accelerate the heat dissipation of the frequency converter drive unit 61 to maintain stable operation.

[0074] The perforated hole 11 is located in the middle of the first mounting plate 1. Its main function is to avoid the heat dissipation unit 66 connected to the bottom of the frequency converter drive unit 61. This allows the heat dissipation unit 66 to be installed smoothly below the frequency converter drive unit 61 without spatial conflict with the first mounting plate 1. It provides the necessary installation position for the heat dissipation unit 66 and improves the space utilization rate.

[0075] In one embodiment, the top side of the second mounting plate 2 is provided with a clearance opening 22, and the top of the second mounting area is provided with an isolation plate 5. The isolation plate 5 connects the first mounting plate 1 and the second mounting plate 2. The isolation plate 5 is provided with a receiving groove 51 on the side facing the clearance opening 22, which is separated from the second mounting area. The receiving groove 51 can accommodate part of the structure of the heat dissipation unit 66.

[0076] Among them, the isolation plate 5 can ensure the effective isolation between the frequency converter drive unit 61 and the main control unit 62, while enabling the heat dissipation unit 66 to cover the second installation area and the clearance area at the same time, increasing the installation area of ​​the heat dissipation unit 66 and the contact area between the heat dissipation unit 66 and the frequency converter drive unit 61 above, so as to optimize heat dissipation.

[0077] On the other hand, this embodiment also provides a heat pump, including:

[0078] Computer chassis;

[0079] The aforementioned electrical box is installed inside the main unit chassis;

[0080] The variable frequency drive unit 61 is mounted on the first mounting plate 1;

[0081] The main control unit 62 is installed on the second mounting plate 2.

[0082] Similarly, in the heat pump of this embodiment, by installing the frequency conversion drive module and the main control unit in the first installation area and the second installation area respectively, and using the metal first installation plate 1 for isolation, the electromagnetic interference problem between the modules in the electrical box is effectively solved. This ensures that the main control unit can accurately receive and process signals from various sensors, and improves the control accuracy and stability of the heat pump system.

[0083] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, 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 application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0084] In the description of this specification, references to terms such as "an embodiment," "example," 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, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0085] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0086] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. An electrical unit housing, which can be installed inside the main unit housing of a heat pump for mounting electrical units; characterized in that, include: The first mounting plate (1) is horizontally set, and the top side forms a first mounting area that can be used to install the frequency converter drive unit (61); The second mounting plate (2) is vertically connected to the lower side of the first mounting plate (1). The two opposite sides of the second mounting plate (2) form a horizontally distributed second mounting area and a clearance area. The second mounting area can be used to install the main control unit (62). The first mounting plate (1) isolates the first mounting area from the second mounting area vertically.

2. The electrical box holder according to claim 1, characterized in that, It also includes a third mounting plate (3), which is connected to one side of the first mounting plate (1) and extends upward. The third mounting plate (3) forms a third mounting area on the side facing the first mounting area. The third mounting area can be used to install the communication unit (63).

3. The electrical box holder according to claim 2, characterized in that, The top side of the third mounting plate (3) is provided with a horizontal folded edge (31), which is used to connect the top wall panel of the main unit housing.

4. The electrical box holder according to claim 2, characterized in that, It also includes a fourth mounting plate (4), which is connected to one side of the first mounting plate (1) and extends downward. A fourth mounting area is formed on one side of the fourth mounting plate (4), which can be used to install wiring units (65).

5. The electrical box holder according to claim 4, characterized in that, The bottom side of the fourth mounting plate (4) is provided with a first L-shaped connecting plate (41) located below the fourth mounting area. The first L-shaped connecting plate (41) includes a first support plate (411) and a first fixing plate (412) forming an angle between each other. The first support plate (411) is connected to the fourth mounting plate (4), and the first fixing plate (412) is connected to the side of the first support plate (411) away from the fourth mounting plate (4). The first fixing plate (412) is used to connect the side wall panel of the main unit chassis.

6. The electrical box holder according to claim 4, characterized in that, The first mounting plate (1), the third mounting plate (3) and the fourth mounting plate (4) are an integral sheet metal structure, and the third mounting plate (3) and the fourth mounting plate (4) are respectively bent and formed on two opposite sides of the first mounting plate (1).

7. The electrical box holder according to claim 1, characterized in that, The second mounting plate (2) has a second L-shaped connecting plate (21) on at least one side. The second L-shaped connecting plate (21) includes a second support plate (211) and a second fixing plate (212) that are angled together. The second support plate (211) is connected to the second mounting plate (2). The second fixing plate (212) is connected to the side of the second support plate (211) away from the second mounting plate (2). The second fixing plate (212) is used to connect the side wall panel of the main unit housing.

8. The electrical box holder according to claim 1, characterized in that, The first mounting plate (1) has a hollow hole (11) in the middle, which is used to avoid the heat dissipation unit (66) connected to the bottom of the frequency conversion drive unit (61).

9. The electrical box holder according to claim 8, characterized in that, The second mounting plate (2) has a clearance opening (22) on its top side, and an isolation plate (5) is provided on the top of the second mounting area. The isolation plate (5) connects the first mounting plate (1) and the second mounting plate (2). The isolation plate (5) has a receiving groove (51) on the side facing the clearance opening (22) that is separated from the second mounting area. The receiving groove (51) can accommodate part of the structure of the heat dissipation unit (66).

10. A heat pump, characterized in that, include: Computer chassis; The electrical box holder as described in any one of claims 1-9 is installed inside the main unit chassis; A variable frequency drive unit (61) is mounted on the first mounting plate (1); The main control unit (62) is mounted on the second mounting plate (2).

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