CN106196878A - A kind of refrigerating device and liquid nitrogen refrigerating method thereof - Google Patents
A kind of refrigerating device and liquid nitrogen refrigerating method thereof Download PDFInfo
- Publication number
- CN106196878A CN106196878A CN201610634529.8A CN201610634529A CN106196878A CN 106196878 A CN106196878 A CN 106196878A CN 201610634529 A CN201610634529 A CN 201610634529A CN 106196878 A CN106196878 A CN 106196878A
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- temperature
- liquid nitrogen
- couveuse
- low
- electromagnetic valve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
- F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
Abstract
The invention discloses a kind of refrigerating device and liquid nitrogen refrigerating method thereof, including: for storing the liquid nitrogen fluid reservoir of conveying level pressure liquid nitrogen, for controlling the low-temperature solenoid valve case of liquid nitrogen flow, for providing the couveuse in refrigerating space；Vaporizer and blower fan it is provided with in described couveuse；It is sequentially connected with by pipeline between described liquid nitrogen fluid reservoir, low-temperature solenoid valve case, vaporizer；Described blower fan is arranged on described vaporizer side；Described vaporizer also includes the gas exhaust piping with ft connection；The present invention is by quickly cooling down the temperature in particular space after liquid nitrogen supply evaporator heat exchange, and refrigerating efficiency is high, cooling rate is fast, simple in construction, maintainability are good, and meets the requirement of low-carbon environment-friendly.
Description
Technical field
The present invention relates to refrigeration technology field, particularly relate to a kind of refrigerating device and liquid nitrogen refrigerating method thereof.
Background technology
Along with improving constantly of social progress and human substance life horizontal, freezer carrier has obtained constantly
Development and progress, at present, carrying out freezing by mechanical refrigeration unit is refrigeration modes the most commonly used in prior art.Inventor
During realizing the present invention, find that above-mentioned prior art presently, there are the defect that refrigerating capacity associates with road speed, with
Time there is also the shortcomings such as cooling rate is slow, complicated in mechanical structure, maintainability are poor, carbon emission is high, noise is big.
Summary of the invention
In view of this, it is an object of the invention to propose a kind of refrigerating efficiency height, simple in construction, maintainability good and satisfied
The refrigerating device of low-carbon environment-friendly requirement and liquid nitrogen refrigerating method thereof.
A kind of refrigerating device provided based on the above-mentioned purpose present invention, including: for storing conveying level pressure liquid nitrogen
Liquid nitrogen fluid reservoir, for controlling the low-temperature solenoid valve case of liquid nitrogen flow, for providing the couveuse in refrigerating space；Described guarantor
Vaporizer and blower fan it is provided with in incubator；Sequentially connected by pipeline between described liquid nitrogen fluid reservoir, low-temperature solenoid valve case, vaporizer
Connect；Described blower fan is arranged on described vaporizer side；Described vaporizer also includes the gas exhaust piping with ft connection.
In some embodiments, it is additionally provided with temperature sensor and temperature controller in described couveuse；Described temperature sensing
Device is used for the temperature signal in couveuse described in Real-time Collection and sends to described temperature controller, and described temperature controller is for according to described
Temperature signal controls described low-temperature solenoid valve case regulation liquid nitrogen flow.
In some embodiments, described vaporizer is arranged on the sidewall of described couveuse.
In some embodiments, described couveuse is vehicle-mounted incubator, railway couveuse, insulated container；When described
When couveuse is vehicle-mounted incubator, described vaporizer is arranged on described couveuse on the sidewall of headstock.
In some embodiments, described low-temperature solenoid valve case includes: heavy caliber normally closed low temp. electric moving electromagnetic valve, small-bore
Normally closed low temp. electric moving electromagnetic valve, heavy caliber normally opened low temp. electric moving electromagnetic valve, the manual electromagnetic valve of low temperature, relief valve；Described liquid nitrogen stores up
Flow container outlet low temp. electric moving electromagnetic valve normally closed with described heavy caliber and small-bore normally closed low temp. electric moving electromagnetic valve respectively are connected, described
Heavy caliber normally closed low temp. electric moving electromagnetic valve and small-bore normally closed low temp. electric moving electromagnetic valve export and the normally opened low temp. electric of described heavy caliber
Moving electromagnetic valve import is connected, and described heavy caliber normally opened low temp. electric moving electromagnetic valve exports electromagnetic valve import phase manual with described low temperature
Even, the manual electromagnetic valve outlet of described low temperature is connected with described vaporizer；Described relief valve is connected on the normally closed low temperature of described heavy caliber
On the pipeline of electric solenoid valve.
On the other hand, the embodiment of the present invention additionally provides a kind of based on the refrigerating device described in aforementioned any one
Liquid nitrogen refrigerating method, including:
Liquid nitrogen fluid reservoir is carried out from supercharging so that it is the liquid nitrogen of interior storage enters low-temperature solenoid valve case by the road；
After described low-temperature solenoid valve case carries out flow-control to liquid nitrogen, liquid nitrogen is made to enter the evaporation in couveuse by the road
Device；
Described vaporizer makes liquid nitrogen heat absorption evaporation, reduces described vaporizer ambient air temperature, cools down in described couveuse
Flow through the air of described evaporator surface；The nitrogen that evaporation generates is expelled to outside via the gas exhaust piping of described vaporizer；
Blower fan work makes the air in described couveuse continuously across described vaporizer and persistently carry out heat exchange, it is achieved institute
State the refrigeration in couveuse and insulation.
In some embodiments, described method also includes:
Temperature value in couveuse described in temperature sensor Real-time Collection in described couveuse also sends to institute's temperature controller；
Described temperature controller controls described low-temperature solenoid valve case regulation liquid nitrogen flow, and then regulation system according to described temperature signal
Cold temperature.
In some embodiments, described temperature controller controls described low-temperature solenoid valve case regulation liquid according to described temperature signal
Nitrogen flow, and then regulation cryogenic temperature, specifically include:
In the couveuse pre-cooling stage, small-bore normally closed low temp. electric moving electromagnetic valve is closed, and described temperature is passed by described temperature controller
The temperature signal of sensor compares with set temperature value, if described temperature signal is more than set temperature value, then opens heavy caliber normally closed
Low temp. electric moving electromagnetic valve, exports big flow liquid nitrogen；If described temperature signal is less than set temperature value, then close heavy caliber normally closed low
Temperature electric solenoid valve, no longer exports liquid nitrogen；
In the couveuse haulage stage, described heavy caliber normally closed low temp. electric moving electromagnetic valve is closed, and described temperature controller is by described temperature
The temperature signal of degree sensor compares with set temperature value, and described temperature signal is more than set temperature value, then open described osculum
Footpath normally closed low temp. electric moving electromagnetic valve, exports low discharge liquid nitrogen；If described temperature signal is less than set temperature value, then close described little
Bore normally closed low temp. electric moving electromagnetic valve, no longer exports liquid nitrogen.
According to real process, manually adjust the aperture of the manual electromagnetic valve of low temperature, to regulate liquid nitrogen flow, to control refrigeration temperature
Degree.
From the above it can be seen that the refrigerating device of present invention offer and liquid nitrogen refrigerating method thereof, pass through liquid nitrogen
The quick temperature in cooling particular space after supply evaporator heat exchange, refrigerating efficiency is high, cooling rate is fast, simple in construction, maintenance
Property is good, and meets the requirement of low-carbon environment-friendly.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is the refrigerating apparatus structure schematic diagram of the embodiment of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in more detail.
The normal boiling point of nitrogen is-196 DEG C, and under normal pressure, the liquid nitrogen of-196 DEG C is water white transparency, readily flowed liquid, vaporization
Latent heat is 199kJ/kg, becomes caning absorb during the nitrogen of-5 DEG C the heat of 397kJ/kg, and heat absorption potentiality are big, and cooling effectiveness is high.Cause
This liquid nitrogen refrigerating system with liquid nitrogen as main energy sources, has the advantage that cooling rate is fast, thermoregulation range is wide.Liquid nitrogen source simultaneously
Extensively, being safe efficient, the cold-producing medium of environmental protection, Zero-discharge non-pollution is the another big feature of liquid nitrogen refrigerating system.
These characteristics based on nitrogen, embodiments provides a kind of refrigerating device.With reference to Fig. 1, for the present invention
The refrigerating apparatus structure schematic diagram of embodiment.
Described refrigerating device, including: liquid nitrogen fluid reservoir 1, low-temperature solenoid valve case 2, couveuse 3.Arrange in couveuse 3
There are vaporizer 301 and blower fan 302.Wherein, between liquid nitrogen fluid reservoir 1, low-temperature solenoid valve case 2, vaporizer 301 by pipeline sequentially
Connect.
Liquid nitrogen fluid reservoir 1 is the liquid nitrogen of the refrigerating device conveying level pressure of the present embodiment, for cylindrical pressure vessel, very
Empty heat insulating construction, design volume determines according to concrete cooling time.Liquid nitrogen fluid reservoir 1 internal layer is made up of corrosion resistant plate, directly with
Liquid nitrogen contacts；Outer layer is general steel plate or corrosion resistant plate, wound insulation material between ectonexine, arranges adsorbent box and adiabatic
Support, and be evacuated.The outfan of liquid nitrogen fluid reservoir 1 connects low-temperature solenoid valve case 2 by pipeline.
Low-temperature solenoid valve case 2 is that the refrigerating device of the present embodiment controls corresponding liquid nitrogen flow, is arranged on liquid nitrogen defeated
Send on pipeline.Low-temperature solenoid valve case 2 input connects liquid nitrogen fluid reservoir 1 by pipeline, and outfan connects vaporizer by pipeline
301.Carry out security control liquid nitrogen by the switch of electromagnetic valve in control low-temperature solenoid valve case 2 and enter the amount of liquid nitrogen in vaporizer 301.
Couveuse 3 is cooled piece, can be vehicle-mounted incubator, railway couveuse, insulated container etc..Wherein, in order to
The inlet/outlet pipe making liquid nitrogen is arranged on safest position, and when couveuse 3 is vehicle-mounted incubator, vaporizer 3301 is arranged on guarantor
Incubator 3 is on the sidewall of headstock, it is ensured that the inlet/outlet pipe of liquid nitrogen is hardly damaged.
Vaporizer 301 is the refrigerating device gasification liquid nitrogen heat absorption of the present embodiment, and vaporizer 301 surface is flow through in cooling
Air, it is achieved refrigeration, is installed in couveuse 3.Vaporizer 301 input connects low-temperature solenoid valve case 2 by pipeline.Outfan
By the nitrogen that evaporation process generates being expelled to outside with the gas exhaust piping 3011 of ft connection.
The position of blower fan 302 is corresponding with the position of vaporizer 301, for the heat in couveuse 3 is sucked vaporizer
Carry out heat exchange in 301, be installed on the side of vaporizer 301.
Further, described refrigerating device also includes: the temperature sensor 303 being arranged in couveuse 3 and temperature control
Device 304.
Temperature sensor 303 is installed in couveuse 3, for monitoring the temperature of couveuse 3, and is connected with temperature controller 304.
The temperature signal gathered in couveuse 3 that temperature sensor 303 is real-time also sends to temperature controller 304.
Temperature controller 304 is installed in couveuse 3, is used for after receiving the temperature signal that temperature sensor 303 transmission comes,
The electromagnetic valve action controlling described low-temperature solenoid valve case according to this temperature signal regulates liquid nitrogen flow, and then regulation refrigeration temperature
Degree.
In the embodiment of the present invention, the pipeline connecting each several part is rustless steel pipeline, and caliber determines according to liquid nitrogen flow, pipe
Wrap up sponge on road to be thermally shielded, pipeline frosting cold draining can be effectively prevented, it is ensured that good refrigeration.
During refrigeration, liquid nitrogen fluid reservoir 1 carries out after in supercharging, tank, liquid nitrogen enters low-temperature solenoid valve case 2 by the road, by low temperature
After solenoid valve box 2 carries out flow-control, liquid nitrogen enters gasification heat absorption in the vaporizer 301 in couveuse 3, and vaporizer is flow through in cooling
The air on 301 surfaces, the air flowing through vaporizer 301 surface in couveuse 3 is the most constantly cooled, thus reaches air cooling-down
Purpose.In couveuse 3, the air guiding by blower fan 302, after when flowing through vaporizer 301 surface, temperature is lowered, then is sent
Return in couveuse 3, such iterative cycles, reduce the purpose of air themperature in couveuse 3.Temperature sensing in couveuse 3
Temperature monitored by device 303, and controls the temperature in couveuse 3 by temperature controller 304, and temperature controller 304 receives from temperature sensor
Temperature signal, and by controlling the temperature in the electromagnetic valve switch regulation couveuse 3 in low-temperature solenoid valve case, thus realize adjusting
The purpose of joint cryogenic temperature.
As an optional embodiment, with reference to Fig. 1, described low-temperature solenoid valve case 2 specifically includes: the normally closed low temperature of heavy caliber
Electric solenoid valve V1, small-bore normally closed low temp. electric moving electromagnetic valve V2, heavy caliber normally opened low temp. electric moving electromagnetic valve V3, low temperature are the most electric
Magnet valve V4, relief valve S1；Described liquid nitrogen fluid reservoir 1 exports low temp. electric moving electromagnetic valve V1 normally closed with described heavy caliber and osculum respectively
Footpath normally closed low temp. electric moving electromagnetic valve V2 connects, and described heavy caliber normally closed low temp. electric moving electromagnetic valve V1 and small-bore normally closed low temperature are electronic
Electromagnetic valve V2 exports low temp. electric moving electromagnetic valve V3 import normally opened with described heavy caliber and is connected, described heavy caliber normally opened low temp. electric galvanic electricity
Magnet valve V3 exports electromagnetic valve V4 import manual with described low temperature and is connected, described low temperature manual electromagnetic valve V4 outlet and described vaporizer
301 are connected；Described relief valve S1 is connected on the pipeline of described heavy caliber normally closed low temp. electric moving electromagnetic valve V1.
During work, in the couveuse 3 pre-cooling stage, small-bore normally closed low temp. electric moving electromagnetic valve V2 closes, and controller 7 is according to guarantor
The temperature value of incubator 3 temperature sensor 6 compares with set temperature value, if temperature is higher than setting value in couveuse 3, then opens big mouth
Footpath normally closed low temp. electric moving electromagnetic valve V1, exports big flow liquid nitrogen；If temperature is less than setting value in couveuse 3, then close heavy caliber
Normally closed low temp. electric moving electromagnetic valve V1, no longer exports liquid nitrogen.In couveuse 3 haulage stage, heavy caliber normally closed low temp. electric moving electromagnetic valve
V1 closes, and controller 7 compares with set temperature value according to the temperature value of couveuse 3 temperature sensor 6, if temperature in couveuse 3
Higher than setting value, then open small-bore normally closed low temp. electric moving electromagnetic valve V2, export low discharge liquid nitrogen；If temperature is low in couveuse 3
In setting value, then close small-bore normally closed low temp. electric moving electromagnetic valve V2, no longer export liquid nitrogen.Low temperature manual electromagnetic valve V4 is according to reality
Border process Non-follow control aperture regulation.
As seen from the above-described embodiment, the refrigerating device of the present invention, by fast quickly cooling after liquid nitrogen supply evaporator heat exchange
But the temperature in particular space, refrigerating efficiency is high, cooling rate is fast, simple in construction, maintainability are good, and meets wanting of low-carbon environment-friendly
Ask.
On the other hand, based on the refrigerating device described in previous embodiment, the embodiment of the present invention additionally provides a kind of liquid
Nitrogen refrigerating method, comprises the following steps:
Liquid nitrogen fluid reservoir is carried out from supercharging so that it is the liquid nitrogen of interior storage enters low-temperature solenoid valve case by the road；
After described low-temperature solenoid valve case carries out flow-control to liquid nitrogen, liquid nitrogen is made to enter the evaporation in couveuse by the road
Device；
Described vaporizer makes liquid nitrogen heat absorption evaporation, reduces described vaporizer ambient air temperature, cools down in described couveuse
Flow through the air of described evaporator surface；The nitrogen that evaporation generates is expelled to outside via the gas exhaust piping of described vaporizer；
Blower fan work makes the air in described couveuse continuously across described vaporizer and persistently carry out heat exchange, it is achieved institute
State the refrigeration in couveuse and insulation.
Visible, the liquid nitrogen refrigerating method of the embodiment of the present invention, specific by quickly cooling down after liquid nitrogen supply evaporator heat exchange
Temperature in space, refrigerating efficiency is high, cooling rate is fast, simple in construction, maintainability are good, and meets the requirement of low-carbon environment-friendly.
In certain embodiments, described method also includes the step regulating cryogenic temperature, specifically includes:
Temperature value in couveuse described in temperature sensor Real-time Collection in described couveuse also sends to institute's temperature controller；
Described temperature controller controls described low-temperature solenoid valve case regulation liquid nitrogen flow, and then regulation system according to described temperature signal
Cold temperature.
In certain embodiments, when the low-temperature solenoid valve case in described refrigerating device, to have farther included heavy caliber normal
Close low temp. electric moving electromagnetic valve, small-bore normally closed low temp. electric moving electromagnetic valve, heavy caliber normally opened low temp. electric moving electromagnetic valve, low temperature the most electric
When magnet valve, relief valve, described method also includes the rate-determining steps for liquid nitrogen flow, specifically includes:
In the couveuse pre-cooling stage, small-bore normally closed low temp. electric moving electromagnetic valve is closed, and described temperature is passed by described temperature controller
The temperature signal of sensor compares with set temperature value, if described temperature signal is more than set temperature value, then opens heavy caliber normally closed
Low temp. electric moving electromagnetic valve, exports big flow liquid nitrogen；If described temperature signal is less than set temperature value, then close heavy caliber normally closed low
Temperature electric solenoid valve, no longer exports liquid nitrogen；
In the couveuse haulage stage, described heavy caliber normally closed low temp. electric moving electromagnetic valve is closed, and described temperature controller is by described temperature
The temperature signal of degree sensor compares with set temperature value, and described temperature signal is more than set temperature value, then open described osculum
Footpath normally closed low temp. electric moving electromagnetic valve, exports low discharge liquid nitrogen；If described temperature signal is less than set temperature value, then close described little
Bore normally closed low temp. electric moving electromagnetic valve, no longer exports liquid nitrogen.
According to real process, manually adjust the aperture of the manual electromagnetic valve of low temperature, to regulate liquid nitrogen flow, to control refrigeration temperature
Degree.
Those of ordinary skill in the field are it is understood that the discussion of any of the above embodiment is exemplary only, not
It is intended to imply that the scope of the present disclosure (including claim) is limited to these examples；Under the thinking of the present invention, above example
Or can also be combined between the technical characteristic in different embodiments, step can realize with random order, and exists such as
Other change of the many of the different aspect of the upper described present invention, in order to concisely they do not provide in details.
Embodiments of the invention be intended to fall into all such replacement within the broad range of claims,
Amendment and modification.Therefore, all within the spirit and principles in the present invention, any omission of being made, amendment, equivalent, improvement
Deng, should be included within the scope of the present invention.
Claims (8)
1. a refrigerating device, it is characterised in that including: for storing the liquid nitrogen fluid reservoir of conveying level pressure liquid nitrogen, being used for
Control the low-temperature solenoid valve case of liquid nitrogen flow, for providing the couveuse in refrigerating space；It is provided with steaming in described couveuse
Send out device and blower fan；It is sequentially connected with by pipeline between described liquid nitrogen fluid reservoir, low-temperature solenoid valve case, vaporizer；Described blower fan sets
Put in described vaporizer side；Described vaporizer also includes the gas exhaust piping with ft connection.
Refrigerating device the most according to claim 1, it is characterised in that be additionally provided with temperature sensing in described couveuse
Device and temperature controller；Described temperature sensor is used for the temperature signal in couveuse described in Real-time Collection and sends to described temperature control
Device, described temperature controller is for controlling described low-temperature solenoid valve case regulation liquid nitrogen flow according to described temperature signal.
Refrigerating device the most according to claim 1, it is characterised in that described vaporizer is arranged on described couveuse
On sidewall.
Refrigerating device the most according to claim 3, it is characterised in that described couveuse is vehicle-mounted incubator, railway
Couveuse, insulated container；When described couveuse is vehicle-mounted incubator, described vaporizer is arranged on described couveuse near car
On the sidewall of head.
Refrigerating device the most according to claim 1, it is characterised in that described low-temperature solenoid valve case includes: heavy caliber
Normally closed low temp. electric moving electromagnetic valve, small-bore normally closed low temp. electric moving electromagnetic valve, heavy caliber normally opened low temp. electric moving electromagnetic valve, low temperature are manual
Electromagnetic valve, relief valve；Described liquid nitrogen fluid reservoir outlet respectively low temp. electric moving electromagnetic valve normally closed with described heavy caliber and small-bore often
Closing low temp. electric moving electromagnetic valve to connect, described heavy caliber normally closed low temp. electric moving electromagnetic valve and small-bore normally closed low temp. electric moving electromagnetic valve go out
Mouth low temp. electric moving electromagnetic valve import normally opened with described heavy caliber is connected, the outlet of described heavy caliber normally opened low temp. electric moving electromagnetic valve and institute
Stating low temperature manual electromagnetic valve import to be connected, the manual electromagnetic valve outlet of described low temperature is connected with described vaporizer；Described relief valve string
It is associated on the pipeline of described heavy caliber normally closed low temp. electric moving electromagnetic valve.
6. a liquid nitrogen refrigerating method based on the refrigerating device described in claim 1 to 5 any one, including:
Liquid nitrogen fluid reservoir is carried out from supercharging so that it is the liquid nitrogen of interior storage enters low-temperature solenoid valve case by the road；
After described low-temperature solenoid valve case carries out flow-control to liquid nitrogen, liquid nitrogen is made to enter the vaporizer in couveuse by the road；
Described vaporizer makes liquid nitrogen heat absorption evaporation, reduces described vaporizer ambient air temperature, flows through in cooling down described couveuse
The air of described evaporator surface；The nitrogen that evaporation generates is expelled to outside via the gas exhaust piping of described vaporizer；
Blower fan work makes the air in described couveuse continuously across described vaporizer and persistently carry out heat exchange, it is achieved described guarantor
Refrigeration in incubator and insulation.
Method the most according to claim 6, it is characterised in that also include:
Temperature value in couveuse described in temperature sensor Real-time Collection in described couveuse also sends to institute's temperature controller；
Described temperature controller controls described low-temperature solenoid valve case regulation liquid nitrogen flow, and then regulation refrigeration temperature according to described temperature signal
Degree.
Method the most according to claim 7, it is characterised in that described temperature controller controls described low according to described temperature signal
Temperature solenoid valve box regulation liquid nitrogen flow, and then regulation cryogenic temperature, specifically include:
In the couveuse pre-cooling stage, small-bore normally closed low temp. electric moving electromagnetic valve is closed, and described temperature controller is by described temperature sensor
Temperature signal compare with set temperature value, if described temperature signal more than set temperature value, then opens the normally closed low temperature of heavy caliber
Electric solenoid valve, exports big flow liquid nitrogen；If described temperature signal is less than set temperature value, then close the normally closed low temp. electric of heavy caliber
Moving electromagnetic valve, no longer exports liquid nitrogen；
In the couveuse haulage stage, described heavy caliber normally closed low temp. electric moving electromagnetic valve is closed, and described temperature is passed by described temperature controller
The temperature signal of sensor compares with set temperature value, described temperature signal be more than set temperature value, then open described small-bore often
Close low temp. electric moving electromagnetic valve, export low discharge liquid nitrogen；If described temperature signal is less than set temperature value, then close described small-bore
Normally closed low temp. electric moving electromagnetic valve, no longer exports liquid nitrogen；
According to real process, manually adjust the aperture of the manual electromagnetic valve of low temperature, to regulate liquid nitrogen flow, to control cryogenic temperature.
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| CN108507249A (en) * | 2017-02-24 | 2018-09-07 | 进得展有限公司 | Refrigeration method, refrigeration device and temperature control module thereof |
| CN108826740A (en) * | 2018-05-14 | 2018-11-16 | 航天新长征电动汽车技术有限公司 | A kind of spray head, fountain liquid nitrogen refrigerating system and refrigerator car |
| CN110089517A (en) * | 2019-04-18 | 2019-08-06 | 杭州紫明冷链科技有限责任公司 | The overfreezing liquid nitrogen biological sample holding vessel of micro- evaporation |
| CN110248842A (en) * | 2017-02-02 | 2019-09-17 | Lg电子株式会社 | Vehicle refrigerator and vehicle |
| CN110617660A (en) * | 2019-09-02 | 2019-12-27 | 北京航天发射技术研究所 | Liquid nitrogen refrigerating system of van-type refrigerator car and control method thereof |
| CN111142589A (en) * | 2019-12-20 | 2020-05-12 | 浙江大学 | Shipborne ultralow-temperature fresh-keeping processing control system and method for aquatic products |
| CN112556264A (en) * | 2020-12-01 | 2021-03-26 | 青岛铂迈睿思生物科技有限公司 | Overlapping liquid nitrogen refrigerating device |
| CN114198958A (en) * | 2021-11-26 | 2022-03-18 | 南通恒信达冷冻设备有限公司 | Jet type liquid nitrogen deep-cooling instant freezer and use method thereof |
| CN115962595A (en) * | 2023-03-16 | 2023-04-14 | 河南工学院 | Refrigerator car based on liquid nitrogen refrigeration and liquid nitrogen refrigeration system |
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