An electrical cabinet for low temperature environments

Abstract

The utility model provides a kind of electrical cabinet for low temperature environment, including cabinet, cabinet one side opening, cabinet opening is connected with cabinet door, cabinet inside is divided into heat dissipation cavity and electrical cavity by partition, heat dissipation cavity is located in electrical cavity upside. Heat dissipation cavity is connected with radiator, evaporator is arranged in electrical cavity, and radiator and evaporator are connected by pipeline. Pipeline is filled with phase change heat storage material. Cabinet top is equipped with heat dissipation port. The utility model divides cabinet into heat dissipation cavity and electrical cavity, so that electrical cavity is always in relatively sealed environment, avoids heat dissipation port to influence cabinet sealing, improves cabinet heat preservation effect. At the same time, by setting phase change heat storage material, the temperature of electrical cavity is transferred to heat dissipation cavity for discharge using phase change process of phase change heat storage material, and heat dissipation energy consumption is reduced, and phase change heat storage material can store waste heat to adjust electrical cavity temperature, reduce heater power consumption.

Description

Technical Field

[0001] This utility model belongs to the field of industrial control equipment technology, specifically relating to an electrical cabinet for low-temperature environments. Background Technology

[0002] Electrical cabinets typically house electronic components such as PLCs, controllers, transformers, and circuit breakers. To prevent these components from overheating and aging or malfunctioning, the internal temperature of the electrical cabinet should generally be controlled between -10℃ and +50℃. Some cabinets require an internal temperature control between -5℃ and +40℃. Outdoor electrical cabinets are exposed to complex and variable environments for extended periods, making them susceptible to extreme temperature fluctuations. In cold regions, insufficient cabinet sealing can allow external moisture to enter, and the significant temperature difference between the inside and outside of the cabinet can cause condensation, potentially leading to short circuits. Furthermore, recent global warming and the increasing number of extreme high-temperature days in Heilongjiang province necessitate forced convection to dissipate heat from the internal equipment. However, the placement of exhaust vents can compromise the cabinet's sealing and insulation performance.

[0003] Therefore, the above problems urgently need to be solved. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the above shortcomings, this utility model provides an electrical cabinet for low-temperature environments, which improves the cabinet's sealing and insulation properties and reduces energy consumption.

[0005] Technical Solution: To achieve the above objectives, this utility model provides an electrical cabinet for low-temperature environments, comprising a cabinet with an opening on one side and a door connected to the opening. The cabinet interior is divided into a heat dissipation chamber and an electrical chamber by a partition, with the heat dissipation chamber located on the upper side of the electrical chamber. A radiator is connected inside the heat dissipation chamber, and an evaporator is installed inside the electrical chamber. The radiator and evaporator are connected by pipes. The pipes are filled with phase change heat storage material. A heat dissipation vent is provided on the top of the cabinet. This utility model is designed for low-temperature regions, particularly suitable for extremely cold regions. The cabinet sidewalls are equipped with an insulation layer, and sealing strips are provided at the cabinet opening and around the outer perimeter of the door. When the door is closed, a sealed cavity is formed inside the cabinet. Given the low ambient temperature of the cabinet, a heating device inside the cabinet heats the electrical chamber. The heat generated by the electrical components installed in the electrical chamber maintains a stable temperature within the electrical chamber, preventing condensation. When the ambient temperature of the cabinet is high, the heat generated by the electrical components raises the temperature of the electrical cavity. The evaporator absorbs the heat from the electrical cavity, and the phase change thermal storage material absorbs heat, vaporizes, and rises. The vaporized phase change thermal storage material enters the radiator, where it releases heat upon cooling. The liquefied phase change thermal storage material then flows into the evaporator under gravity. The radiator expels the heat released by the phase change thermal storage material from the heat dissipation vents into the heat dissipation cavity, thereby reducing the temperature of the electrical cavity and maintaining it within the operating temperature range. This prevents overheating of electrical components and extends their lifespan. Simultaneously, when the temperature inside the electrical cavity rises during operation but has not yet reached the phase change temperature, the phase change thermal storage material absorbs and stores heat. When the electrical cavity temperature decreases, a temperature difference exists between the phase change thermal storage material and the electrical cavity, causing the phase change thermal storage material to release heat, maintaining the electrical cavity temperature and reducing energy consumption. This invention divides the cabinet interior into a heat dissipation cavity and an electrical cavity, ensuring the electrical cavity remains in a relatively sealed environment. This prevents the heat dissipation vents from affecting the cabinet's airtightness and improves the cabinet's insulation performance. Meanwhile, by setting up phase change heat storage materials, the phase change process of the phase change heat storage materials is used to transfer the temperature of the electrical cavity to the heat dissipation cavity for discharge, thereby reducing heat dissipation energy consumption. At the same time, the phase change heat storage materials can store waste heat to regulate the temperature of the electrical cavity and reduce the power consumption of the heater.

[0006] Furthermore, in the aforementioned electrical cabinet for low-temperature environments, the heat dissipation vents include a first heat dissipation hole and a second heat dissipation hole, both of which are fan-shaped and centrally symmetrically arranged. A sealing plate is connected to the top of the cabinet. The sealing plate is circular, with its central axis movably connected to the top of the cabinet. The sealing plate has a first notch and a second notch, which correspond to the first and second heat dissipation holes, respectively. When the outdoor temperature is low and there is no need for heat dissipation, rotating the sealing plate closes the heat dissipation vents, reducing the cold bridge effect and improving insulation.

[0007] Furthermore, in the aforementioned electrical cabinet for low-temperature environments, a motor is connected inside the heat dissipation cavity. The motor is connected to the inner side wall of the top of the cabinet, and the sealing plate is movably connected to the outer side of the top of the cabinet. The motor and the sealing plate are driven together, and the motor drives the sealing plate to rotate. By controlling the rotation of the sealing plate through the motor, the opening and closing of the heat dissipation vents can be controlled. The motor can be easily integrated into the electrical cabinet and controlled by the control system. Based on the temperature detected by the internal temperature detection device of the cabinet, the opening and closing of the heat dissipation vents can be controlled, thereby improving adaptability and reducing energy consumption.

[0008] Furthermore, in the aforementioned electrical cabinet for low-temperature environments, the cabinet is made of multi-layer thermal insulation panels. These panels include an outer skin layer, a thermal insulation layer, a thermal insulation layer, and an inner liner layer, connected sequentially from the outside in. The thermal insulation layer is made of polyurethane and is foamed between the thermal insulation layer and the inner liner layer. Both the outer skin layer and the inner liner layer are made of metal, providing impact resistance and strong protection and support. The thermal insulation layer reduces the impact of external temperatures on the cabinet's interior, while the thermal insulation layer reduces internal heat loss, maintaining a stable electrical cavity temperature and reducing energy consumption. The foamed thermal insulation layer fills gaps and improves insulation performance.

[0009] Furthermore, in the aforementioned electrical cabinets used in low-temperature environments, the insulation layer 0 is made of extruded polystyrene board. Extruded polystyrene board has a low thermal conductivity, good insulation properties, extremely low water absorption rate, which can prevent water molecules from penetrating, high strength, and can withstand impact, avoiding deformation caused by pressure.

[0010] Furthermore, in the aforementioned electrical cabinet for low-temperature environments, the cabinet is provided with a cable inlet for cable entry. A sealing head is provided at the cable inlet, and the sealing head includes a connector. The connector is a hollow cylindrical body with an annular ring in its middle section. A fastening ring is threaded onto one end of the connector, and a sealing ring is provided between the annular ring and the fastening ring. A locking part is provided at the end of the connector away from the fastening ring, and a sealing sleeve is connected to the inner wall of the locking part. A nut is threaded onto the side of the connector with the locking part, and the nut presses against the locking part. The locking part has a through groove arranged along the axis of the connector, and the through grooves are arranged in an array around the side wall of the connector. The annular ring is fitted onto the connector, the connector passes through the cable inlet on the side wall of the cabinet, and the fastening ring is screwed into the threaded end of the connector, connecting the connector to the side wall of the cabinet and causing the annular ring to press against the sealing ring to form a seal. The sealing sleeve is then inserted into the locking part, and then the nut is sequentially fitted onto the cable, which passes through the connector. When the nut is screwed into the connector, it secures the locking part. The nut presses against the locking part, narrowing the through groove. The locking part then presses the sealing sleeve tightly against the cable surface, forming a seal. This sealing head eliminates gaps at the cable inlet, preventing external moisture from entering the cabinet, improving insulation, and reducing energy consumption.

[0011] Furthermore, in the aforementioned electrical cabinet for low-temperature environments, the radiator and evaporator are respectively configured as heat exchangers consisting of coils and fins. These heat exchangers are commonly used in industrial applications, improving heat exchange efficiency.

[0012] As can be seen from the above technical solution, this utility model has the following beneficial effects: This utility model is used for electrical cabinets in low-temperature environments. It divides the cabinet interior into a heat dissipation cavity and an electrical cavity, ensuring the electrical cavity remains in a relatively sealed environment. This prevents the heat dissipation vents from affecting the cabinet's sealing performance and improves the cabinet's insulation effect. Simultaneously, by incorporating phase change heat storage materials, the phase change process of these materials transfers the electrical cavity temperature to the heat dissipation cavity for discharge, reducing heat dissipation energy consumption. Furthermore, the phase change heat storage materials can store residual heat to regulate the electrical cavity temperature and reduce heater power consumption. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of the electrical cabinet of this utility model for use in low-temperature environments;

[0014] Figure 2 This is a top view of the electrical cabinet of this utility model for use in low-temperature environments;

[0015] Figure 3 for Figure 2 The AA-direction cross-sectional view;

[0016] Figure 4 This is a schematic diagram of the heat dissipation port structure;

[0017] Figure 5 This is a schematic diagram of the sealing plate structure;

[0018] Figure 6 This is a cross-sectional view of the multi-layer thermal insulation board;

[0019] Figure 7 Here is an exploded view of the sealing head;

[0020] In the diagram: 1. Cabinet, 101. Outer skin, 102. Insulation layer, 103. Thermal insulation layer, 104. Inner liner, 2. Cabinet door, 11. Partition, 12. Heat dissipation cavity, 13. Electrical cavity, 14. Radiator, 15. Evaporator, 16. Pipe, 18. Heat dissipation vent, 181. First heat dissipation hole, 182. Second heat dissipation hole, 19. Sealing plate, 191. First notch, 192. Second notch, 3. Sealing head, 31. Connector, 311. Ring, 312. Locking part, 3121. Through groove, 32. Fastening ring, 33. Sealing ring, 34. Sealing sleeve, 35. Nut, 4. Motor. Detailed Implementation

[0021] Example 1

[0022] like Figure 1-3The diagram shows an electrical cabinet for low-temperature environments, comprising a cabinet 1 with an opening on one side and a door 2 connected to the opening. The interior of the cabinet 1 is divided into a heat dissipation chamber 12 and an electrical chamber 13 by a partition 11, with the heat dissipation chamber 12 located above the electrical chamber 13. A radiator 14 is connected inside the heat dissipation chamber 12, and an evaporator 15 is located inside the electrical chamber 13. The radiator 14 and evaporator 15 are connected by a pipe 16. The pipe 16 is filled with a phase change thermal storage material. A heat dissipation vent 18 is located on the top of the cabinet 1. The phase change thermal storage material is an LM-XR series phase change thermal storage material, preferably the multi-component composite phase change material LM-XR-36 launched by Binghe Refrigerant: phase change temperature 36℃, energy storage density 294.1 J / g. The heat exchanger is a commonly used industrial heat exchanger to improve heat exchange efficiency. The radiator 14 and evaporator 15 are heat exchangers composed of coils and fins, respectively.

[0023] like Figure 4-5 The electrical cabinet shown is designed for low-temperature environments. Its heat dissipation vent 18 includes a first heat dissipation hole 181 and a second heat dissipation hole 182. Both the first and second heat dissipation holes 181 and 182 are fan-shaped and centrally symmetrically arranged. A sealing plate 19 is connected to the top of the cabinet 1. The sealing plate 19 is circular and its central axis is movably connected to the top of the cabinet 1. The sealing plate 19 has a first notch 191 and a second notch 192, which correspond to the first and second heat dissipation holes 181 and 182.

[0024] like Figure 3 The electrical cabinet shown is designed for low-temperature environments. A motor 4 is connected inside the heat dissipation cavity 12. The motor 4 is connected to the inner side wall of the top of the cabinet 1. The sealing plate 19 is movably connected to the outer side of the top of the cabinet 1. The motor 4 and the sealing plate 19 are connected in a drive connection, and the motor 4 drives the sealing plate 19 to rotate.

[0025] like Figure 6 The electrical cabinet shown is designed for low-temperature environments. Cabinet 1 is made of multi-layered thermal insulation panels, including an outer skin layer 101, a thermal insulation layer 102, a thermal insulation layer 103, and an inner liner layer 104. These layers are connected sequentially from the outside in. The thermal insulation layer 103 is made of polyurethane and is foamed between the thermal insulation layer 102 and the inner liner layer 104. The outer skin layer 101 and the inner liner layer 104 are both metal layers, providing impact resistance and strong protection and support. The thermal insulation layer 102 reduces the impact of external temperatures on the interior of cabinet 1, while the thermal insulation layer 103 reduces internal heat loss, maintaining a stable temperature in the electrical cavity 13 and reducing energy consumption. The foamed thermal insulation layer 103 fills gaps and improves insulation performance.

[0026] In this embodiment, the insulation layer 102 is made of extruded polystyrene board. Extruded polystyrene board has a low thermal conductivity, good insulation properties, extremely low water absorption, which can prevent water molecules from penetrating, high strength, and can withstand impact, avoiding deformation caused by pressure.

[0027] like Figure 7 The electrical cabinet shown is for use in low-temperature environments. Cabinet 1 has a cable inlet for cable entry, and a sealing head 3 is provided at the cable inlet (see...). Figure 1 The sealing head 3 includes a connector 31, which is a hollow cylindrical body. A ring 311 is located in the middle section of the connector 31. A fastening ring 32 is threaded to one end of the connector, and a sealing ring 33 is located between the ring 311 and the fastening ring 32. A locking part 312 is located at the end of the connector 31 away from the fastening ring 32, and a sealing sleeve 34 is connected to the inner wall of the locking part 312. A nut 35 is threaded to the side of the connector 31 with the locking part 312, and the nut 35 presses against the locking part 312. The locking part 312 has a through groove 3121 arranged along the axis of the connector 31, and the through grooves 3121 are arranged in an array around the side wall of the connector 31. A ring 311 is fitted onto a connector 31, which passes through an inlet hole on the side wall of the cabinet 1. A fastening ring 32 is screwed into the threaded end of the connector 31, connecting the connector 31 to the side wall of the cabinet 1. The ring 311 compresses the sealing ring 33 to form a seal. A sealing sleeve 34 is inserted into a locking part 312. Then, nuts 35 are sequentially fitted onto the cables, which pass through the connector 31. Nuts 35 are screwed into the locking part 312 of the connector 31, compressing the locking part 312 and narrowing the through groove 3121. The locking part 312 presses the sealing sleeve 34 against the cable surface, forming a seal. The sealing head 3 eliminates gaps at the inlet, preventing external moisture from entering the cabinet 1, improving insulation, and reducing energy consumption.

[0028] This utility model is used in low-temperature areas, and is especially suitable for use in extremely cold areas. The side wall of the cabinet 1 of this utility model is provided with a heat insulation layer. The opening of the cabinet 1 and the outer periphery of the cabinet door 2 are respectively provided with sealing strips. When the cabinet door 2 is closed, a sealed cavity is formed inside the cabinet 1.

[0029] When the ambient temperature of the cabinet 1 is low, the temperature sensor installed in the cabinet 1 detects the low temperature, and the control device controls the motor 4 to rotate, which in turn drives the sealing plate 19 to close the heat dissipation vent 18. The heating device installed inside the cabinet 1 and the heat generated by the electrical components installed in the electrical cavity 13 heat the electrical cavity 13, keeping the electrical cavity 13 at a stable temperature and preventing condensation inside the electrical cavity 13.

[0030] When the ambient temperature of cabinet 1 is high, the temperature sensor on cabinet 1 detects that the temperature is too high. The control device controls the motor 4 to rotate, which in turn drives the sealing plate 19 to open the heat dissipation vent 18. The evaporator 15 absorbs heat from the electrical cavity 13. The phase change heat storage material absorbs heat, vaporizes, and rises. The vaporized phase change heat storage material enters the radiator 14. The phase change heat storage material releases heat upon cooling, and then liquefies. The liquefied phase change heat storage material flows into the evaporator 15 under the influence of gravity, repeating the above steps. The radiator 14 discharges the heat released by the phase change heat storage material from the heat dissipation vent 18 into the heat dissipation cavity 12, thereby reducing the temperature of the electrical cavity 13 and maintaining the temperature of the electrical cavity 13 within the operating temperature range. This prevents the electrical components from overheating and extends their service life.

[0031] When the electrical cavity 13 is in operation, the temperature rises, but it remains within the operating temperature range and has not reached the phase change temperature of the phase change heat storage material. The heat dissipation vent remains closed, and the phase change heat storage material absorbs and stores heat. When the temperature of the electrical cavity 13 decreases, a temperature difference exists between the phase change heat storage material and the electrical cavity 13. The phase change heat storage material releases heat to maintain the temperature of the electrical cavity 13 and reduce energy consumption.

[0032] The above embodiments are exemplary and are intended to illustrate the technical concept and features of this utility model, so that those skilled in the art can understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. An electrical cabinet for use in low-temperature environments, characterized in that: The system includes a cabinet (1), which has an opening on one side and a cabinet door (2) connected to the opening. The cabinet (1) is divided into a heat dissipation cavity (12) and an electrical cavity (13) by a partition (11). The heat dissipation cavity (12) is located on the upper side of the electrical cavity (13). A radiator (14) is connected inside the heat dissipation cavity (12), and an evaporator (15) is provided inside the electrical cavity (13). The radiator (14) and the evaporator (15) are connected by a pipe (16). The pipe (16) is filled with phase change heat storage material. A heat dissipation vent (18) is provided on the top of the cabinet (1).

2. The electrical cabinet for low-temperature environments according to claim 1, characterized in that: The heat dissipation vent (18) includes a first heat dissipation hole (181) and a second heat dissipation hole (182). The first heat dissipation hole (181) and the second heat dissipation hole (182) are respectively fan-shaped and are centrally symmetrical. The top of the cabinet (1) is connected to a sealing plate (19). The sealing plate (19) is circular and its central axis is movably connected to the top of the cabinet (1). The sealing plate (19) has a first notch (191) and a second notch (192). The first notch (191) and the second notch (192) are respectively set to correspond to the first heat dissipation hole (181) and the second heat dissipation hole (182).

3. The electrical cabinet for low-temperature environments according to claim 2, characterized in that: A motor (4) is connected inside the heat dissipation cavity (12). The motor (4) is connected to the inner side wall of the top of the cabinet (1). The sealing plate (19) is movably connected to the outer side of the top of the cabinet (1). The motor (4) and the sealing plate (19) are connected in a drive. The motor (4) drives the sealing plate (19) to rotate.

4. The electrical cabinet for low-temperature environments according to claim 1, characterized in that: The cabinet (1) is made of multi-layer heat insulation board, which includes an outer skin layer (101), a heat insulation layer (102), a heat insulation layer (103), and an inner liner layer (104). The outer skin layer (101), the heat insulation layer (102), the heat insulation layer (103), and the inner liner layer (104) are connected sequentially from the outside to the inside. The heat insulation layer (103) is made of polyurethane and is foamed between the heat insulation layer (102) and the inner liner layer (104).

5. The electrical cabinet for low-temperature environments according to claim 4, characterized in that: The insulation layer (102) is made of extruded polystyrene board.

6. The electrical cabinet for low-temperature environments according to claim 1, characterized in that: The cabinet (1) is provided with a cable inlet hole for cable entry. A sealing head (3) is provided at the cable inlet hole. The sealing head (3) includes a connector (31). The connector (31) is a hollow cylinder. A ring (311) is provided in the middle section of the connector (31). A fastening ring (32) is threaded to one end of the connector. A sealing ring (33) is provided between the ring (311) and the fastening ring (32). A locking part (312) is provided at the end of the connector (31) away from the fastening ring (32). A sealing sleeve (34) is connected to the inner side wall of the locking part (312). A nut (35) is threaded to the side of the connector (31) where the locking part (312) is provided. The nut (35) squeezes the locking part (312). The locking part (312) is provided with a through groove (3121) arranged along the axis of the connector (31). The through groove (3121) is arranged in an array around the side wall of the connector (31).

7. The electrical cabinet for low-temperature environments according to claim 1, characterized in that: The radiator (14) and evaporator (15) are respectively configured as heat exchangers consisting of coils and fins.

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