CN217031715U - Liquid nitrogen refrigerating device with adjusting function - Google Patents
Liquid nitrogen refrigerating device with adjusting function Download PDFInfo
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- CN217031715U CN217031715U CN202123073241.3U CN202123073241U CN217031715U CN 217031715 U CN217031715 U CN 217031715U CN 202123073241 U CN202123073241 U CN 202123073241U CN 217031715 U CN217031715 U CN 217031715U
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Abstract
The utility model belongs to the technical field of refrigeration, and particularly relates to a liquid nitrogen refrigerating device with a regulating function. The device comprises a liquid nitrogen liquid storage tank (1), a low-temperature electromagnetic valve box (2) and an insulation box (3), wherein an evaporator (301) and a fan (302) are arranged in the insulation box (3); the liquid nitrogen liquid storage tank (1), the low-temperature electromagnetic valve box (2) and the evaporator (301) are sequentially connected through pipelines; the fan (302) is arranged on one side of the evaporator (301); evaporimeter (301) still include the exhaust pipe with outside intercommunication, be connected with exhaust pipe (3011) on evaporimeter (301) and be used for discharging the nitrogen gas that the evaporation process generated to the outside through it, exhaust pipe is stainless steel pipe, wraps up the sponge on the pipeline and insulates against heat, prevents that the pipeline from frosting and leaking cold, and low temperature solenoid valve case (2) are according to the temperature control liquid nitrogen flow in insulation can (3). The refrigeration system has the advantages of high refrigeration efficiency, high cooling speed, simple structure and good maintainability, and meets the requirements of low carbon and environmental protection.
Description
Technical Field
The utility model belongs to the technical field of refrigeration, and particularly relates to a liquid nitrogen refrigerating device with a regulating function.
Background
With the social progress and the continuous improvement of the living standard of human materials, the refrigeration/freezing transportation industry is continuously developed and advanced, and at present, the refrigeration by a mechanical refrigerating unit is the most common refrigeration mode in the prior art. In the process of implementing the utility model, the defects of the prior art that the refrigeration capacity is related to the running speed are found.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: provides a liquid nitrogen refrigerating device with a regulating function, wherein the refrigerating capacity is not influenced by the driving speed in the transportation process.
The technical scheme is as follows:
a liquid nitrogen refrigerating device with a regulating function comprises: the device comprises a liquid nitrogen liquid storage tank 1 for storing and conveying constant-pressure liquid nitrogen, a low-temperature electromagnetic valve box 2 for controlling the flow of the liquid nitrogen, and an insulation can 3 for providing a refrigerating and freezing space; an evaporator 301 and a fan 302 are arranged in the heat preservation box 3; the liquid nitrogen liquid storage tank 1, the low-temperature electromagnetic valve box 2 and the evaporator 301 are sequentially connected through pipelines; the fan 302 is arranged on one side of the evaporator 301; the evaporator 301 still includes the exhaust pipe way with outside intercommunication, is connected with exhaust pipe way 3011 on the evaporator 301 and is used for discharging the nitrogen gas that the evaporation process generated to the outside through it, and exhaust pipe way is nonrust steel pipe, and the parcel sponge is thermal-insulated on the pipeline, prevents that the pipeline from frosting and leaking cold, and low temperature solenoid valve case 2 is according to the temperature control liquid nitrogen flow in the insulation can 3.
Further, the liquid nitrogen storage tank 1 is a self-pressurization liquid storage tank, and liquid nitrogen stored in the liquid nitrogen storage tank enters the low-temperature electromagnetic valve box 2 through a pipeline.
Further, the low temperature solenoid valve housing 2 includes: a large-caliber normally closed low-temperature electric solenoid valve V1, a small-caliber normally closed low-temperature electric solenoid valve V2, a large-caliber normally open low-temperature electric solenoid valve V3, a low-temperature manual solenoid valve V4 and a safety valve S1; an outlet of the liquid nitrogen storage tank 1 is respectively connected with the large-caliber normally closed low-temperature electric solenoid valve V1 and the small-caliber normally closed low-temperature electric solenoid valve V2, outlets of the large-caliber normally closed low-temperature electric solenoid valve V1 and the small-caliber normally closed low-temperature electric solenoid valve V2 are connected with an inlet of the large-caliber normally open low-temperature electric solenoid valve V3, an outlet of the large-caliber normally open low-temperature electric solenoid valve V3 is connected with an inlet of the low-temperature manual solenoid valve V4, and an outlet of the low-temperature manual solenoid valve V4 is connected with the evaporator 301; the safety valve S1 is connected in series with the pipeline of the large-caliber normally closed low-temperature electric solenoid valve V1.
Further, the heat insulation box 3 is a vehicle-mounted heat insulation box.
Further, the evaporator 301 is disposed on the sidewall of the heat insulation box 3, so that liquid nitrogen absorbs heat and evaporates, the temperature of ambient air is reduced, and air flowing through the surface of the evaporator in the heat insulation box is cooled; the nitrogen gas generated by evaporation is discharged to the outside through an exhaust line of the evaporator.
Further, the temperature control device also comprises a temperature sensor 303, wherein the temperature sensor 303 is arranged in the heat insulation box 3 and used for monitoring the temperature and controlling the temperature in the heat insulation box 3 through a temperature controller 304, the temperature controller 304 receives a temperature signal from the temperature sensor 304 and adjusts the temperature in the heat insulation box 3 by controlling the electromagnetic valve switch in the low-temperature electromagnetic valve box, so that the purpose of adjusting the refrigeration temperature is achieved.
Has the beneficial effects that:
through setting up low temperature solenoid valve case, adjust the liquid nitrogen flow, the temperature in the control insulation can, refrigeration ability does not receive driving speed influence in the transportation. The liquid nitrogen is supplied to the evaporator for heat exchange, and then the temperature in a specific space is quickly cooled, so that the refrigeration system has the advantages of high refrigeration efficiency, high cooling speed, simple structure and good maintainability, and meets the requirements of low carbon and environmental protection.
Drawings
FIG. 1 is a schematic diagram of a liquid nitrogen refrigerating device with a regulating function according to an embodiment of the utility model.
Detailed Description
Referring to fig. 1, the apparatus for refrigerating liquid nitrogen and adjusting refrigerating temperature of the present invention comprises: the device comprises a liquid nitrogen liquid storage tank 1 for storing and conveying constant-pressure liquid nitrogen, a low-temperature electromagnetic valve box 2 for controlling the flow of the liquid nitrogen, and an incubator 3 for providing a refrigerating and freezing space; an evaporator 301, a fan 302, a temperature sensor 303 and a temperature controller 304 are arranged in the heat insulation box 3; the fan 302 is arranged on one side of the evaporator 301; the input end of the evaporator 301 is connected with the output end of the low-temperature electromagnetic valve box 2 through a pipeline, and nitrogen generated in the evaporation process is discharged to the outside through an exhaust pipeline 3011 communicated with the outside. The temperature sensor 303 is arranged in the heat insulation box 3 and used for monitoring the temperature and controlling the temperature in the heat insulation box 3 through the temperature controller 304, and the temperature controller 304 receives a temperature signal from the temperature sensor 304 and adjusts the temperature in the heat insulation box 3 by controlling the electromagnetic valve switch in the low-temperature electromagnetic valve box, thereby achieving the purpose of adjusting the refrigeration temperature.
The liquid nitrogen storage tank 1 is self-pressurized, so that the stored liquid nitrogen enters the low-temperature electromagnetic valve box 2 through a pipeline; after the low-temperature electromagnetic valve box 2 controls the flow of the liquid nitrogen, the liquid nitrogen enters an evaporator 301 in the heat insulation box 3 through a pipeline; the evaporator 301 absorbs heat of the liquid nitrogen to evaporate, reduces the temperature of the air around the evaporator 301, and cools the air flowing through the surface of the evaporator 301 in the heat-insulating box 3; the nitrogen gas generated by evaporation is discharged to the outside via an exhaust line of the evaporator 301; the fan 302 works to make the air in the heat preservation box 3 continuously pass through the evaporator 301 and continuously perform heat exchange, so that the refrigeration and heat preservation in the heat preservation box 3 are realized.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to specific embodiments and with reference to the accompanying fig. 1.
The standard boiling point of nitrogen is-196 ℃, liquid nitrogen at-196 ℃ under normal pressure is colorless and transparent liquid which is easy to flow, the latent heat of vaporization is 199kJ/kg, and when the liquid nitrogen is changed into nitrogen gas at-5 ℃, the heat can be absorbed at 397kJ/kg, the heat absorption potential is large, and the cooling efficiency is high. Therefore, the liquid nitrogen refrigeration system using liquid nitrogen as the main energy has the advantages of high cooling speed and wide temperature regulation range. Meanwhile, the liquid nitrogen has wide sources, is a safe, efficient and environment-friendly refrigerant, and has zero emission and no pollution, which is another great characteristic of a liquid nitrogen refrigeration system.
The liquid nitrogen refrigeration and refrigeration temperature regulation device comprises: a liquid nitrogen liquid storage tank 1, a low-temperature electromagnetic valve box 2 and an incubator 3. An evaporator 301 and a fan 302 are provided in the heat-insulating box 3. Wherein, the liquid nitrogen liquid storage tank 1, the low-temperature electromagnetic valve box 2 and the evaporator 301 are connected in sequence through pipelines.
The liquid nitrogen liquid storage tank 1 is used for conveying liquid nitrogen with constant pressure, is a cylindrical pressure container and a vacuum heat insulation structure, and the design volume is determined according to specific refrigeration time. The inner layer of the liquid nitrogen storage tank 1 is made of a stainless steel plate and is directly contacted with liquid nitrogen; the outer layer is a common steel plate or a stainless steel plate, a heat insulating material is wound between the inner layer and the outer layer, a sorbent box and a heat insulating support are arranged between the inner layer and the outer layer, and the inner layer and the outer layer are vacuumized. The output end of the liquid nitrogen liquid storage tank 1 is connected with the low-temperature electromagnetic valve box 2 through a pipeline.
The low-temperature electromagnetic valve box 2 controls the corresponding liquid nitrogen flow for the device and is arranged on a liquid nitrogen conveying pipeline. The input end of the low-temperature electromagnetic valve box 2 is connected with the liquid nitrogen liquid storage tank 1 through a pipeline, and the output end of the low-temperature electromagnetic valve box is connected with the evaporator 301 through a pipeline. The amount of liquid nitrogen entering the evaporator 301 is safely controlled by controlling the opening and closing of the electromagnetic valve in the low-temperature electromagnetic valve box 22.
The incubator 3 is a vehicle-mounted incubator, and in order to arrange the inlet and outlet pipes of the liquid nitrogen at the safest position, the evaporator 301 is arranged on the side wall of the incubator 3 close to the vehicle head, so that the inlet and outlet pipes of the liquid nitrogen are not easy to damage.
The evaporator 301 absorbs heat from the gasified liquid nitrogen of the device, cools the air flowing over the surface of the evaporator 301, realizes refrigeration, and is installed in the heat insulation box 3. The input end of the evaporator 301 is connected with the low-temperature electromagnetic valve box 2 through a pipeline. The output end discharges nitrogen gas generated in the evaporation process to the outside through an exhaust line 3011 communicating with the outside.
The fan 302 is provided at a position corresponding to the position of the evaporator 301, and is installed on the side surface of the evaporator 301 to suck heat in the heat insulation box 3 into the evaporator 301 for heat exchange.
The device for refrigerating by liquid nitrogen and adjusting the refrigerating temperature further comprises: a temperature sensor 303 and a thermostat 304 provided in the heat-insulating case 3.
The temperature sensor is arranged in the heat preservation box 3, is used for monitoring the temperature of the heat preservation box 3 and is connected with the temperature controller. The temperature sensor collects the temperature signal in the heat preservation box 3 in real time and sends the temperature signal to the temperature controller.
The temperature controller is arranged in the heat insulation box 3 and used for controlling the electromagnetic valve of the low-temperature electromagnetic valve box 2 to act according to the temperature signal to adjust the liquid nitrogen flow and further adjust the refrigeration temperature after receiving the temperature signal sent by the temperature sensor.
During refrigeration, the liquid nitrogen liquid storage tank 1 is self-pressurized, liquid nitrogen in the tank enters the low-temperature electromagnetic valve box 2 through a pipeline and then is subjected to flow control through the low-temperature electromagnetic valve box 2, the liquid nitrogen enters the evaporator 301 in the heat insulation box 3 to be gasified and absorb heat, air flowing through the surface of the evaporator 301 is cooled, and air flowing through the surface of the evaporator 301 in the heat insulation box 3 is also cooled continuously, so that the aim of cooling the air is fulfilled. The air in the thermal insulation box 3 is guided by the fan 302, the temperature is reduced when the air flows through the surface of the evaporator 301, and then the air is sent back to the thermal insulation box 3, and the circulation is repeated in this way, so that the purpose of reducing the temperature of the air in the thermal insulation box 3 is achieved. The temperature sensor 303 in the heat preservation box 3 monitors the temperature, and the temperature in the heat preservation box 3 is controlled by the temperature controller 304, the temperature controller 304 receives the temperature signal from the temperature sensor, and the temperature in the heat preservation box 3 is adjusted by controlling the electromagnetic valve switch in the low-temperature electromagnetic valve box 2, thereby achieving the purpose of adjusting the refrigeration temperature.
When the device works, in the stage of precooling in the heat preservation box 3, the small-caliber normally-closed low-temperature electric electromagnetic valve V2 is closed, the temperature controller 304 compares the temperature value of the temperature sensor 303 with a set temperature value, and if the temperature in the heat preservation box 3 is higher than the set value, the large-caliber normally-closed low-temperature electric electromagnetic valve V1 is opened to output large-flow liquid nitrogen; if the temperature in the incubator 3 is lower than the set value, the large-caliber normally closed low-temperature electric electromagnetic valve V1 is closed, and liquid nitrogen is not output any more. In the stage of transporting the heat preservation box 3, the large-caliber normally-closed low-temperature electric solenoid valve V1 is closed, the temperature controller 304 compares the temperature value of the temperature sensor 303 of the heat preservation box 3 with a set temperature value, and if the temperature in the heat preservation box 3 is higher than the set value, the small-caliber normally-closed low-temperature electric solenoid valve V2 is opened to output low-flow liquid nitrogen; if the temperature in the incubator 3 is lower than a set value, the small-caliber normally closed low-temperature electric electromagnetic valve V2 is closed, and liquid nitrogen is not output any more. The low-temperature manual electromagnetic valve V4 is adjusted according to the actual process manual control opening degree.
Claims (6)
1. A liquid nitrogen refrigerating device with a regulating function is characterized by comprising: the device comprises a liquid nitrogen liquid storage tank (1) for storing and conveying constant-pressure liquid nitrogen, a low-temperature electromagnetic valve box (2) for controlling the flow of the liquid nitrogen, and an incubator (3) for providing a refrigerating and freezing space; an evaporator (301) and a fan (302) are arranged in the heat preservation box (3); the liquid nitrogen liquid storage tank (1), the low-temperature electromagnetic valve box (2) and the evaporator (301) are sequentially connected through pipelines; the fan (302) is arranged on one side of the evaporator (301); evaporimeter (301) still include the exhaust pipe with outside intercommunication, be connected with exhaust pipe (3011) on evaporimeter (301) and be used for discharging the nitrogen gas that the evaporation process generated to the outside through it, exhaust pipe is stainless steel pipe, wraps up the sponge on the pipeline and insulates against heat, prevents that the pipeline from frosting and leaking cold, and low temperature solenoid valve case (2) are according to the temperature control liquid nitrogen flow in insulation can (3).
2. The liquid nitrogen refrigerating device with the regulation function according to claim 1, wherein the liquid nitrogen storage tank (1) is a self-pressurization storage tank, and liquid nitrogen stored in the liquid nitrogen storage tank enters the low-temperature electromagnetic valve box (2) through a pipeline.
3. The liquid nitrogen refrigerating plant with regulating function according to claim 1, characterized in that said cryogenic electromagnetic valve box (2) comprises: a large-caliber normally closed low-temperature electric solenoid valve V1, a small-caliber normally closed low-temperature electric solenoid valve V2, a large-caliber normally open low-temperature electric solenoid valve V3, a low-temperature manual solenoid valve V4 and a safety valve S1; the outlet of the liquid nitrogen storage tank (1) is respectively connected with the large-caliber normally closed low-temperature electric solenoid valve V1 and the small-caliber normally closed low-temperature electric solenoid valve V2, the outlets of the large-caliber normally closed low-temperature electric solenoid valve V1 and the small-caliber normally closed low-temperature electric solenoid valve V2 are connected with the inlet of the large-caliber normally open low-temperature electric solenoid valve V3, the outlet of the large-caliber normally open low-temperature electric solenoid valve V3 is connected with the inlet of the low-temperature manual solenoid valve V4, and the outlet of the low-temperature manual solenoid valve V4 is connected with the evaporator (301); the safety valve S1 is connected in series with the pipeline of the large-caliber normally closed low-temperature electric electromagnetic valve V1.
4. The liquid nitrogen refrigerating device with the adjusting function according to claim 1, wherein the incubator (3) is a vehicle-mounted incubator.
5. The liquid nitrogen refrigerating device with regulation function according to claim 1, wherein said evaporator (301) is arranged on the side wall of said incubator (3) to make the liquid nitrogen absorb heat and evaporate, reduce the ambient air temperature, and cool the air flowing through the surface of said evaporator in said incubator; the nitrogen gas generated by the evaporation is discharged to the outside through an exhaust line of the evaporator.
6. The liquid nitrogen refrigerating device with the adjusting function according to claim 1, further comprising a temperature sensor (303), wherein the temperature sensor (303) is arranged in the heat preservation box (3) and used for monitoring the temperature and controlling the temperature in the heat preservation box (3) through a temperature controller (304), the temperature controller (304) receives a temperature signal from the temperature sensor (303) and adjusts the temperature in the heat preservation box (3) by controlling an electromagnetic valve switch in the low-temperature electromagnetic valve box, so that the purpose of adjusting the refrigerating temperature is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123073241.3U CN217031715U (en) | 2021-12-08 | 2021-12-08 | Liquid nitrogen refrigerating device with adjusting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123073241.3U CN217031715U (en) | 2021-12-08 | 2021-12-08 | Liquid nitrogen refrigerating device with adjusting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217031715U true CN217031715U (en) | 2022-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123073241.3U Active CN217031715U (en) | 2021-12-08 | 2021-12-08 | Liquid nitrogen refrigerating device with adjusting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217031715U (en) |
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2021
- 2021-12-08 CN CN202123073241.3U patent/CN217031715U/en active Active
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