A heat dissipation device for electric control cabinet working in high temperature environment

Abstract

The present invention belongs to the technical field of cooling electric control cabinets, and discloses a heat dissipation device for electric control cabinets working in a high temperature environment. The device comprises an electric control cabinet housing, a liquid nitrogen storage tank is installed in the electric control cabinet housing, liquid nitrogen is filled in the liquid nitrogen storage tank, a piston push plate is slidably connected in the liquid nitrogen storage tank, a liquid nitrogen transport pipe is fixedly connected to the liquid nitrogen storage tank, a liquid nitrogen baffle is slidably connected to the other end of the liquid nitrogen transport pipe, and a brake spring is arranged between the liquid nitrogen baffle and the liquid nitrogen transport pipe; the present invention arranges the cooperation of structures such as the liquid nitrogen storage tank and the circulating air pump, and through the sliding of the piston push plate, the liquid nitrogen in the liquid nitrogen storage tank is transported to the cooling bin through the liquid nitrogen transport pipe, and then the air in the electric control cabinet housing is continuously transported to the cooling bin through the circulating air pump, so that the gas in the cooling bin is cooled by the liquid nitrogen, and then transported back to the electric control cabinet housing, and the process is repeated continuously, so as to achieve the purpose of rapidly cooling the electric control cabinet housing when working in a high temperature environment.

Description

Technical Field

[0001] The invention belongs to the technical field of cooling electric control cabinets, and in particular is a heat dissipation device for electric control cabinets working in a high-temperature environment. Background Art

[0002] The electric control cabinet is an important device used to install, connect and protect electrical equipment or electronic components and control systems. It is usually used in the industrial field to centrally control and manage power distribution, motor drive, automation control and other equipment and systems;

[0003] As the furnace in the production workshop is turned on, the indoor temperature of the electric control cabinet in the production workshop rises sharply, especially in the summer when the outdoor ambient temperature is high, the indoor temperature can reach 60℃~80℃, causing the temperature of the electric control cabinet to be higher than the working temperature. The high temperature will cause the internal insulation material of the electric control cabinet to age, resulting in a decrease in insulation performance and an increase in electrical failures. It will also affect the stability of the internal circuit and cause the control system to be unstable. The high temperature working environment will seriously affect the cooling and heat dissipation of the electric control cabinet. Generally, the electric control cabinet dissipates heat by exchanging air with the environment, but the high temperature working environment makes it difficult to dissipate heat through air exchange. How to effectively prevent the electric control cabinet from overheating and ensure the normal production has become an urgent problem to be solved. Summary of the invention

[0004] In order to solve the problem mentioned in the above background technology that the high temperature working environment makes it difficult to dissipate heat in the electric control cabinet, which easily leads to frequent shutdown or even damage of the electric control cabinet due to the temperature being higher than the working temperature, the present invention provides a heat dissipation device for the electric control cabinet working in a high temperature environment.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a heat dissipation device for an electric control cabinet working in a high-temperature environment, comprising an electric control cabinet housing, a liquid nitrogen storage tank is installed in the electric control cabinet housing, the liquid nitrogen storage tank is filled with liquid nitrogen, a piston push plate is slidably connected in the liquid nitrogen storage tank, a liquid nitrogen transport pipe is fixedly connected to the liquid nitrogen storage tank, a liquid nitrogen baffle is slidably connected to the other end of the liquid nitrogen transport pipe, a brake spring is arranged between the liquid nitrogen baffle and the liquid nitrogen transport pipe, and the liquid nitrogen transport pipe passes through and is fixedly connected to a cooling bin;

[0006] Among them, an outlet pipe is fixedly connected to the side of the cooling warehouse away from the liquid nitrogen transport pipe, and a circulating air pump is fixedly connected to the outlet pipe. The circulating air pump is fixedly installed on the outer shell of the electric control cabinet, and an inlet pipe is fixedly connected to the end of the circulating air pump away from the outlet pipe. The inlet pipe is fixedly connected to the outer shell of the electric control cabinet. A cooling piston is slidably connected in the cooling warehouse, and the cooling piston is slidably connected to the outer shell of the electric control cabinet. A sliding limit spring is arranged between the cooling piston and the outer shell of the electric control cabinet.

[0007] Preferably, an end of the liquid nitrogen storage tank away from the liquid nitrogen transport pipe is fixedly connected to a gas transfer pipe, a piston air chamber is fixedly connected to the upper side of the gas transfer pipe, the piston air chamber is penetrated and fixedly connected to the outer shell of the electric control cabinet, a sealing shell is fixedly connected to the upper side of the piston air chamber, and the sealing shell is fixedly connected to the outer shell of the electric control cabinet.

[0008] Preferably, the sealed shell is fixedly connected to a rotating motor, the output shaft of the rotating motor is rotatably connected to the sealed shell, the output shaft of the rotating motor is fixedly connected to a rotating crank, the rotating crank is rotatably connected to a connecting crank, the connecting crank is rotatably connected to a transmission crank at the lower side, the transmission crank is fixedly connected to an extrusion piston at the lower side, and the extrusion piston is slidably connected to the piston air chamber.

[0009] Preferably, a temperature sensor is installed on the upper side of the sealed housing, and the temperature sensor is electrically connected to the rotating motor. When the temperature detected by the temperature sensor is greater than 40 degrees Celsius, an electrical signal is transmitted to the rotating motor.

[0010] Preferably, a one-way valve that can only transport air from outside to inside is provided on the piston air chamber, and a one-way valve that can only transport air from the air transmission pipeline to the liquid nitrogen storage tank is provided between the air transmission pipeline and the liquid nitrogen storage tank.

[0011] Preferably, a brake piston is slidably connected through the air transmission pipeline, the brake piston is slidably connected to the piston air cavity, and the piston size at the upper end of the brake piston is the same as the size of the through hole opened at the lower side of the piston air cavity and connected to the air transmission pipeline.

[0012] Preferably, a pressure relief piston is slidably connected through the lower side of the piston air cavity, a limit tension spring is arranged between the pressure relief piston and the piston air cavity, and the pressure relief piston is squeezed and matched with the brake piston.

[0013] Preferably, the lower end of the brake piston is slidably connected to a transmission air chamber, the transmission air chamber is fixedly connected to the housing of the electric control cabinet, a limiting spring is arranged between the brake piston and the transmission air chamber, the upper end of the transmission air chamber is fixedly connected to a connecting air pipe, the other end of the connecting air pipe is fixedly connected to the brake air chamber, and a temperature control piston is slidably connected in the brake air chamber.

[0014] Preferably, a temperature-sensing air cavity is fixedly connected to the lower side of the brake air cavity, the temperature-sensing air cavity is fixedly connected to the housing of the electric control cabinet through, and a temperature transfer sealing cover is fixedly connected to the lower side of the temperature-sensing air cavity.

[0015] Preferably, the thermal conductivity coefficient of the temperature transfer sealing cover is high, and the critical value of the gas contained in the piston space composed of the temperature-sensing gas cavity and the temperature-control piston is 40 degrees Celsius.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention cooperates with structures such as a liquid nitrogen storage tank and a circulating air pump, and through the sliding of a piston push plate, the liquid nitrogen in the liquid nitrogen storage tank is transported to the cooling bin through a liquid nitrogen transport pipe, and then the air in the outer shell of the electric control cabinet is continuously transported to the cooling bin through the circulating air pump, so that the gas in the cooling bin is cooled by liquid nitrogen and then transported back to the outer shell of the electric control cabinet, and the process is repeated continuously, so as to achieve the purpose of rapidly cooling the outer shell of the electric control cabinet when working in a high temperature environment;

[0018] The present invention arranges the cooperation of structures such as a temperature sensor and a rotating motor, and the temperature sensor detects the working environment temperature of the electric control cabinet shell. When the environment temperature is too high, the rotating motor is started, so that the extrusion piston continuously transports the gas in the piston air cavity into the liquid nitrogen storage tank, so that the liquid nitrogen in the liquid nitrogen storage tank flows into the cooling bin, so as to achieve the effect of controlling the temperature in the electric control cabinet shell, so that the electric control cabinet shell is always within the working temperature;

[0019] The present invention cooperates with structures such as a temperature-sensitive air cavity and a brake piston. When the temperature inside the housing of the electric control cabinet is lower than 40 degrees Celsius after cooling with liquid nitrogen, the gas temperature between the temperature-sensitive air cavity and the temperature control piston is lower than a critical value, and the volume is rapidly reduced, thereby causing the brake piston to slide upward, preventing the liquid nitrogen from entering the cooling chamber again, thereby achieving the effect of controlling the internal temperature of the housing of the electric control cabinet, avoiding excessively low temperature in the housing of the electric control cabinet, and saving the use of liquid nitrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the electric control cabinet of the present invention;

[0022] Figure 3 It is a half-section schematic diagram of the liquid nitrogen control structure of the present invention;

[0023] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0024] Figure 5 This is an exploded view of the piston stroke structure of the present invention;

[0025] Figure 6 A half-section schematic diagram of the brake structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the liquid nitrogen cooling structure of the present invention;

[0027] Figure 8 For the present invention Figure 7 Enlarged view of point B in the middle.

[0028] In the figure: 100, electric control cabinet housing; 200, liquid nitrogen storage tank; 201, piston push plate; 202, liquid nitrogen transport pipe; 203, liquid nitrogen baffle; 204, brake spring; 300, piston air chamber; 301, sealing shell; 302, air transmission pipeline; 303, temperature sensor; 304, rotating motor; 305, rotating crank; 306, connecting crank; 307, driving crank; 308, extrusion piston; 4 00, pressure relief piston; 401, limit tension spring; 500, brake air chamber; 501, temperature sensing air chamber; 502, temperature transfer sealing cover; 503, temperature control piston; 504, connecting air pipe; 505, transmission air chamber; 506, brake piston; 507, limit spring; 600, circulating air pump; 601, air inlet pipe; 602, air outlet pipe; 603, cooling chamber; 604, cooling piston; 605, sliding limit spring. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 8 As shown, the present invention provides a heat dissipation device for an electric control cabinet working in a high temperature environment, comprising an electric control cabinet housing 100, a liquid nitrogen storage tank 200 is installed in the electric control cabinet housing 100, the liquid nitrogen storage tank 200 is filled with liquid nitrogen, a piston push plate 201 is slidably connected in the liquid nitrogen storage tank 200, a liquid nitrogen transport pipe 202 is fixedly connected to the liquid nitrogen storage tank 200, a liquid nitrogen baffle 203 is slidably connected to the other end of the liquid nitrogen transport pipe 202, a brake spring 204 is arranged between the liquid nitrogen baffle 203 and the liquid nitrogen transport pipe 202, and a cooling bin 603 is fixedly connected to the liquid nitrogen transport pipe 202 through the liquid nitrogen transport pipe 202;

[0031] Among them, an outlet pipe 602 is fixedly connected to the side of the cooling chamber 603 away from the liquid nitrogen transport pipe 202, and the outlet pipe 602 is fixedly connected to the circulating air pump 600. The circulating air pump 600 is fixedly installed with the electric control cabinet housing 100. An end of the circulating air pump 600 away from the outlet pipe 602 is fixedly connected to the inlet pipe 601, and the inlet pipe 601 is fixedly connected to the electric control cabinet housing 100. A cooling piston 604 is slidably connected in the cooling chamber 603, and the cooling piston 604 is slidably connected to the electric control cabinet housing 100. A sliding limit spring 605 is arranged between the cooling piston 604 and the electric control cabinet housing 100.

[0032] One end of the liquid nitrogen storage tank 200 away from the liquid nitrogen transport pipe 202 is fixedly connected to a gas transfer pipe 302, and a piston air chamber 300 is fixedly connected to the upper side of the gas transfer pipe 302. The piston air chamber 300 is fixedly connected to the electric control cabinet housing 100 through, and a sealing shell 301 is fixedly connected to the upper side of the piston air chamber 300, and the sealing shell 301 is fixedly connected to the electric control cabinet housing 100.

[0033] The sealed shell 301 is fixedly connected to a rotating motor 304, and the output shaft of the rotating motor 304 is rotatably connected to the sealed shell 301. The output shaft of the rotating motor 304 is fixedly connected to a rotating crank 305, and the rotating crank 305 is rotatably connected to a connecting crank 306. The lower side of the connecting crank 306 is rotatably connected to a transmission crank 307, and the lower side of the transmission crank 307 is fixedly connected to an extrusion piston 308. The extrusion piston 308 is slidably connected to the piston air chamber 300. A temperature sensor 303 is installed on the upper side of the sealed shell 301, and the temperature sensor 303 is electrically connected to the rotating motor 304. When the temperature detected by the temperature sensor 303 is greater than forty degrees Celsius, an electrical signal is transmitted to the rotating motor 304.

[0034] A one-way valve is provided on the piston air chamber 300 so as to only deliver air from outside to inside, and a one-way valve is provided between the air transmission pipeline 302 and the liquid nitrogen storage tank 200 so as to only deliver air from the air transmission pipeline 302 to the liquid nitrogen storage tank 200 .

[0035] The above scheme is adopted: when the temperature sensor 303 detects that the ambient temperature outside the electric control cabinet housing 100 is greater than 40 degrees Celsius, the rotating motor 304 is started, thereby driving the extrusion piston 308 to slide repeatedly in the piston air chamber 300, continuously squeezing the gas in the piston air chamber 300 to flow into the liquid nitrogen storage tank 200, and then squeezing the piston push plate 201 to slide, so that the liquid nitrogen in the liquid nitrogen storage tank 200 flows to the cooling chamber 603 through the liquid nitrogen transport pipe 202, so that the circulating air pump 600 continuously pumps the gas in the electric control cabinet housing 100 into the outlet pipe 602 through the inlet pipe 601, and then enters the cooling chamber 603. When the gas in the cooling chamber 603 continues to increase, the air pressure in the cooling chamber 603 increases, and the cooling piston 604 is squeezed to slide upward. When the liquid nitrogen enters the cooling chamber from the liquid nitrogen transport pipe 202 After entering the cooling chamber 603, due to the extremely low temperature of the liquid nitrogen, the gas in the cooling chamber 603 is rapidly cooled, thereby reducing the air pressure in the cooling chamber 603. As the circulating air pump 600 continuously delivers gas to the cooling chamber 603, the newly delivered gas is cooled by the liquid nitrogen. The sliding limit spring 605 and the cooling piston 604 are set to prevent the gas in the cooling chamber 603 from directly flowing to the electric control cabinet housing 100, thereby extending the contact time between the gas and the liquid nitrogen in the cooling chamber 603 and ensuring the cooling effect of the high-temperature gas. When the low-temperature gas pressure in the cooling chamber 603 is greater than the elastic force of the sliding limit spring 605, the cooling piston 604 is squeezed upward, so that the gas cooled by the liquid nitrogen flows into the electric control cabinet housing 100, exchanges heat with the hot air in the electric control cabinet housing 100, and achieves the purpose of cooling and dissipating the heat of the electric control cabinet housing 100.

[0036] like Figures 2 to 4 and Figure 6 As shown, a brake piston 506 is slidably connected through the air transmission pipeline 302, and the brake piston 506 is slidably connected to the piston air chamber 300. The piston size of the upper end of the brake piston 506 is the same as the size of the through hole opened on the lower side of the piston air chamber 300 and connected to the air transmission pipeline 302.

[0037] A pressure relief piston 400 is slidably connected to the lower side of the piston air chamber 300 . A limit tension spring 401 is provided between the pressure relief piston 400 and the piston air chamber 300 . The pressure relief piston 400 is pressed and matched with the brake piston 506 .

[0038] The lower end of the brake piston 506 is slidably connected to the transmission air chamber 505, and the transmission air chamber 505 is fixedly connected to the electric control cabinet housing 100. A limiting spring 507 is arranged between the brake piston 506 and the transmission air chamber 505. The upper end of the transmission air chamber 505 is fixedly connected to the connecting air pipe 504, and the other end of the connecting air pipe 504 is fixedly connected to the brake air chamber 500. The temperature control piston 503 is slidably connected in the brake air chamber 500.

[0039] A temperature sensing air cavity 501 is fixedly connected to the lower side of the brake air cavity 500 . The temperature sensing air cavity 501 is fixedly connected to the electric control cabinet housing 100 . A temperature transfer sealing cover 502 is fixedly connected to the lower side of the temperature sensing air cavity 501 .

[0040] The heat transfer sealing cover 502 has a high heat transfer coefficient, and the critical value of the gas contained in the piston space composed of the temperature-sensing gas cavity 501 and the temperature-control piston 503 is 40 degrees Celsius.

[0041] The above scheme is adopted: as the circulating air pump 600 continuously delivers gas to the cooling chamber 603, the low-temperature gas cooled by the cooling chamber 603 is then delivered from the cooling chamber 603 to the electric control cabinet housing 100, so that the gas temperature in the electric control cabinet housing 100 is reduced, and then the temperature of the electrical components in the electric control cabinet housing 100 is also reduced, achieving the purpose of cooling, ensuring that the working temperature of the electric control cabinet is below 40 degrees Celsius, and ensuring the safe operation of the electric control cabinet. When the temperature in the electric control cabinet housing 100 is lower than 40 degrees Celsius, the volume of gas between the temperature-sensing air cavity 501 and the temperature-controlled piston 503 is reduced, and the temperature-controlled piston 503 slides downward, thereby causing the brake piston 506 to slide upward to the piston gas cavity 501. The liquid nitrogen in the liquid nitrogen storage tank 200 no longer flows into the cooling chamber 603 through the liquid nitrogen transport pipe 202. When the liquid nitrogen is stopped from being transported into the cooling chamber 603, the volume of the gas between the temperature-sensing gas chamber 501 and the temperature-control piston 503 expands again due to the unchanged outside temperature, and liquid nitrogen is transported into the cooling chamber 603 again until the temperature drops below 40 degrees Celsius. The above process is repeated continuously to ensure that the working temperature of the electric control cabinet is always below 40 degrees Celsius. By reciprocatingly transporting liquid nitrogen into the cooling chamber 603, the temperature in the electric control cabinet housing 100 is ensured to be below 40 degrees Celsius, but not too low, so as to avoid the electric control cabinet being in a low temperature state and always maintaining the working temperature, and also to avoid the waste of liquid nitrogen.

[0042] The working principle and use process of the present invention:

[0043] When the temperature sensor 303 detects that the ambient temperature outside the electric control cabinet housing 100 is greater than 40 degrees Celsius, the temperature sensor 303 transmits an electrical signal to the rotating motor 304, and the rotating motor 304 starts, thereby driving the rotating crank 305 to rotate, and then driving the transmission crank 307 to slide up and down through the connecting crank 306, thereby driving the extrusion piston 308 to slide repeatedly in the piston air chamber 300. When the extrusion piston 308 slides downward in the piston air chamber 300, the gas in the extrusion piston air chamber 300 flows into the gas transmission pipeline 302, and then flows into the liquid nitrogen storage tank 200 through the one-way valve between the gas transmission pipeline 302 and the liquid nitrogen storage tank 200. When the extrusion piston 308 slides upward, the gas pressure in the piston air chamber 300 and the gas transmission pipeline 302 is reduced, and then the gas in the electric control cabinet housing 100 is transported from the one-way valve on the piston air chamber 300 to the piston air chamber 300, keeping the total amount of gas in the piston air chamber 300 and the gas transmission pipeline 302 unchanged.

[0044] When the gas in the gas transmission pipeline 302 flows into the liquid nitrogen storage tank 200, the piston push plate 201 is pushed to slide in the liquid nitrogen storage tank 200, and the liquid nitrogen in the liquid nitrogen storage tank 200 is pushed into the liquid nitrogen transport pipe 202, and the liquid nitrogen in the liquid nitrogen transport pipe 202 squeezes the liquid nitrogen baffle 203. When the squeezing force of the liquid nitrogen in the liquid nitrogen transport pipe 202 on the liquid nitrogen baffle 203 is greater than the elastic force of the brake spring 204 on the liquid nitrogen baffle 203, the liquid nitrogen in the liquid nitrogen transport pipe 202 squeezes the liquid nitrogen baffle 203 and flows into the cooling chamber 603. As the rotating motor 304 continues to rotate, the liquid nitrogen in the liquid nitrogen storage tank 200 continues to flow into the cooling chamber 603.

[0045] When the temperature sensor 303 detects that the temperature of the environment in which the electric control cabinet housing 100 is located is greater than 40 degrees Celsius, an electrical signal is transmitted to the circulating air pump 600 at the same time to start the circulating air pump 600, and then the circulating air pump 600 continuously pumps the gas in the electric control cabinet housing 100 into the outlet pipe 602 through the inlet pipe 601, and then enters the cooling chamber 603. When the gas in the cooling chamber 603 continues to increase, the air pressure in the cooling chamber 603 increases, squeezing the cooling piston 604 to slide upward. When liquid nitrogen enters the cooling chamber 603 from the liquid nitrogen transport pipe 202, the cooling piston 604 is pressed upward. Due to the extremely low temperature of liquid nitrogen, the gas in the cooling chamber 603 is quickly cooled, thereby reducing the air pressure in the cooling chamber 603. As the circulating air pump 600 continuously delivers gas to the cooling chamber 603, the newly delivered gas is cooled by liquid nitrogen. When the low-temperature gas pressure in the cooling chamber 603 is greater than the elastic force of the sliding limit spring 605, the cooling piston 604 is squeezed upward, so that the gas cooled by liquid nitrogen flows into the electric control cabinet housing 100, and exchanges heat with the hot air in the electric control cabinet housing 100, thereby achieving the purpose of cooling and dissipating the electric control cabinet housing 100.

[0046] As the circulating air pump 600 continuously delivers gas to the cooling chamber 603, the low-temperature gas cooled by the cooling chamber 603 is then delivered from the cooling chamber 603 to the electric control cabinet housing 100, and the temperature inside the electric control cabinet housing 100 decreases. When the temperature inside the electric control cabinet housing 100 is lower than 40 degrees Celsius, the volume of gas between the temperature sensing air cavity 501 and the temperature control piston 503 decreases. Under the action of gravity, the temperature control piston 503 slides downward, thereby causing the gas inside the transmission air cavity 505 to The gas flows into the brake air chamber 500 through the connecting air pipe 504, and the elastic force of the limit spring 507 makes the brake piston 506 slide upward, and then the brake piston 506 slides into the piston air chamber 300, blocking the gas in the piston air chamber 300 from flowing into the gas transmission pipe 302, so that no gas flows into the liquid nitrogen storage tank 200, the piston push plate 201 stops sliding, and the liquid nitrogen in the liquid nitrogen storage tank 200 no longer flows into the cooling chamber 603 through the liquid nitrogen transport pipe 202;

[0047] If the external ambient temperature is still higher than forty degrees Celsius, the rotating motor 304 will continue to drive the extrusion piston 308 to reciprocate up and down. In order to prevent the pressure in the piston air chamber 300 from increasing continuously, the brake piston 506 slides upward, and then squeezes the pressure relief piston 400 to slide synchronously, so that the lower end of the piston air chamber 300 is no longer in a sealed state, and the piston air chamber 300 is connected to the air in the electric control cabinet housing 100. When the liquid nitrogen is stopped from being transported into the cooling chamber 603, the gas volume between the temperature sensing air chamber 501 and the temperature control piston 503 expands again, the brake piston 506 is reset, and the pressure relief piston 400 and the limit tension spring 401 are reset, and liquid nitrogen is transported into the cooling chamber 603 again until the temperature drops below forty degrees Celsius, and this is repeated continuously.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat dissipation device for an electric control cabinet working in a high temperature environment, comprising an electric control cabinet housing (100), characterized in that: A liquid nitrogen storage tank (200) is installed in the electric control cabinet housing (100), the liquid nitrogen storage tank (200) is filled with liquid nitrogen, a piston push plate (201) is slidably connected in the liquid nitrogen storage tank (200), a liquid nitrogen transport pipe (202) is fixedly connected to the liquid nitrogen storage tank (200), a liquid nitrogen baffle (203) is slidably connected to the other end of the liquid nitrogen transport pipe (202), a brake spring (204) is provided between the liquid nitrogen baffle (203) and the liquid nitrogen transport pipe (202), and a cooling bin (603) is fixedly connected to the liquid nitrogen transport pipe (202); In particular, a gas outlet pipe (602) is fixedly connected to the cooling chamber (603) at a side away from the liquid nitrogen transport pipe (202), a circulating air pump (600) is fixedly connected to the gas outlet pipe (602), the circulating air pump (600) is fixedly installed to the electric control cabinet housing (100), an end of the circulating air pump (600) away from the gas outlet pipe (602) is fixedly connected to an air inlet pipe (601), the air inlet pipe (601) is fixedly connected to the electric control cabinet housing (100), a cooling piston (604) is slidably connected in the cooling chamber (603), the cooling piston (604) is slidably connected to the electric control cabinet housing (100), and a sliding limit spring (605) is provided between the cooling piston (604) and the electric control cabinet housing (100); An end of the liquid nitrogen storage tank (200) away from the liquid nitrogen transport pipe (202) is fixedly connected to a gas transmission pipeline (302); a piston air chamber (300) is fixedly connected to the upper side of the gas transmission pipeline (302); the piston air chamber (300) is fixedly connected to the housing (100) of the electric control cabinet; a sealing shell (301) is fixedly connected to the upper side of the piston air chamber (300); and the sealing shell (301) is fixedly connected to the housing (100) of the electric control cabinet; The sealed housing (301) is fixedly connected to a rotating motor (304); the output shaft of the rotating motor (304) is rotatably connected to the sealed housing (301); the output shaft of the rotating motor (304) is fixedly connected to a rotating crank (305); the rotating crank (305) is rotatably connected to a connecting crank (306); the lower side of the connecting crank (306) is rotatably connected to a transmission crank (307); the lower side of the transmission crank (307) is fixedly connected to an extrusion piston (308); the extrusion piston (308) is slidably connected to the piston air chamber (300); A temperature sensor (303) is installed on the upper side of the sealed housing (301), the temperature sensor (303) is electrically connected to the rotating motor (304), and the temperature sensor (303) transmits an electrical signal to the rotating motor (304) when the detected temperature is greater than 40 degrees Celsius; A one-way valve that can only transport air from the outside to the inside is provided on the piston air chamber (300), and a one-way valve that can only transport air from the air transmission pipeline (302) to the liquid nitrogen storage tank (200) is provided between the air transmission pipeline (302) and the liquid nitrogen storage tank (200); A brake piston (506) is slidably connected through the air transmission pipeline (302), and the brake piston (506) is slidably connected to the piston air chamber (300). The size of the upper end of the brake piston (506) is the same as the size of the through hole opened on the lower side of the piston air chamber (300) and communicating with the air transmission pipeline (302); A pressure relief piston (400) is slidably connected to the lower side of the piston air chamber (300), a limit tension spring (401) is provided between the pressure relief piston (400) and the piston air chamber (300), and the pressure relief piston (400) is extrusion-fitted with the brake piston (506); The lower end of the brake piston (506) is slidably connected to a transmission air chamber (505), the transmission air chamber (505) is fixedly connected to the electric control cabinet housing (100), a limit spring (507) is arranged between the brake piston (506) and the transmission air chamber (505), the upper end of the transmission air chamber (505) is fixedly connected to a connecting air pipe (504), the other end of the connecting air pipe (504) is fixedly connected to a brake air chamber (500), and a temperature control piston (503) is slidably connected inside the brake air chamber (500); A temperature sensing air cavity (501) is fixedly connected to the lower side of the brake air cavity (500); the temperature sensing air cavity (501) is fixedly connected to the electric control cabinet housing (100); and a temperature transfer sealing cover (502) is fixedly connected to the lower side of the temperature sensing air cavity (501).

2. The heat dissipation device for electric control cabinets working in high temperature environment according to claim 1 is characterized in that: The heat transfer sealing cover (502) has a high thermal conductivity coefficient, and the critical value of the gas contained in the piston space formed by the temperature-sensing gas cavity (501) and the temperature-control piston (503) is 40 degrees Celsius.

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