CN108800697A - A kind of refrigeration injection device, liquid nitrogen refrigerating system and refrigerated van type vehicle - Google Patents
A kind of refrigeration injection device, liquid nitrogen refrigerating system and refrigerated van type vehicle Download PDFInfo
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- CN108800697A CN108800697A CN201810533408.3A CN201810533408A CN108800697A CN 108800697 A CN108800697 A CN 108800697A CN 201810533408 A CN201810533408 A CN 201810533408A CN 108800697 A CN108800697 A CN 108800697A
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- Prior art keywords
- liquid nitrogen
- injector
- throat
- ejector pipe
- cooling medium
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 256
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 128
- 239000007788 liquid Substances 0.000 title claims abstract description 118
- 238000002347 injection Methods 0.000 title claims abstract description 52
- 239000007924 injection Substances 0.000 title claims abstract description 52
- 238000005057 refrigeration Methods 0.000 title claims abstract description 29
- 239000002826 coolant Substances 0.000 claims description 48
- 239000000523 sample Substances 0.000 claims description 29
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 16
- 239000001301 oxygen Substances 0.000 claims description 16
- 229910052760 oxygen Inorganic materials 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 13
- 238000002309 gasification Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 description 11
- 239000007789 gas Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 208000001034 Frostbite Diseases 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 241000743339 Agrostis Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
- B60P3/20—Refrigerated goods vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D33/00—Superstructures for load-carrying vehicles
- B62D33/04—Enclosed load compartments ; Frameworks for movable panels, tarpaulins or side curtains
- B62D33/048—Enclosed load compartments ; Frameworks for movable panels, tarpaulins or side curtains for refrigerated goods vehicles
-
- 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
- F25D29/006—Safety devices
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a kind of refrigeration injection device, liquid nitrogen refrigerating system and refrigerated van type vehicles.Refrigeration injection device includes throat and ejector pipe, the internal diameter of the ejector pipe gradually increases in its axis direction, the incidence end in the ejector pipe is arranged in the throat, and the internal diameter of the throat gradually increases from inside to outside in the axial direction of the ejector pipe, the ratio of throat's minimum diameter size and the internal diameter size of the ejection end of the ejector pipe is 0.3-0.8.The refrigeration injection device jet power is strong, can rapidly and uniformly reach cooling-down effect, while can be to avoid near ejector pipe the phenomenon that Cryogenic burns.
Description
Technical field
The present invention relates to liquid nitrogen refrigerating technical fields, and in particular to a kind of refrigeration injection device, liquid nitrogen refrigerating system and van-type
Refrigerator car.
Background technology
With the raising of people's life and the general level of the health, consumer is to the timeliness of food supply, especially to the requirement of quality
Higher and higher, Cold Chain Logistics are developed rapidly with the transformation of consumption idea, and the type of chilled food is increasing, previous logical
Single temperature zone refrigerator car is increasingly difficult to meet the needs of market.
In recent years, liquid nitrogen refrigerating technology has larger development.Liquid nitrogen refrigerating technology is divided into direct-type liquid nitrogen refrigerating technology
With indirect type liquid nitrogen refrigerating technology two ways, wherein indirect type liquid nitrogen refrigerating technology finally needs the liquid nitrogen of low temperature being discharged
Outside compartment, the waste of liquid nitrogen cold is caused.In order to maximally utilize the cold of liquid nitrogen, common liquid nitrogen refrigerating mode is straight in the market
Connect formula liquid nitrogen refrigerating technology.
Direct-type liquid nitrogen refrigerating is directly and to pass through liquid nitrogen gasification heat absorption and the temperature difference by the liquid nitrogen spray to compartment of low temperature
It absorbs heat to reduce the temperature in carriage body.However, since liquid nitrogen is injected directly in compartment and the knot of current refrigeration injection device
Structure existing defects, decline close to the temperature of mentioned nozzle area in compartment very fast, and the temperature far from nozzle location declines slower, this is straight
The non-uniform temperature caused in compartment is connect, and often relatively low close to the temperature of mentioned nozzle area, there are the risks of Cryogenic burns.
Invention content
The purpose of the present invention is to provide a kind of refrigeration injection device, liquid nitrogen refrigerating system and refrigerated van type vehicles, to solve
Non-uniform temperature and the problem of Cryogenic burns in compartment.
To achieve the above object, the technical scheme is that providing a kind of refrigeration injection device, the refrigeration injection device packet
Throat and ejector pipe are included, the internal diameter of the ejector pipe gradually increases in its axis direction, and the throat is arranged in the ejector pipe
Incidence end, and the internal diameter of the throat the ejector pipe axial direction from inside to outside gradually increase, throat's minimum diameter
The ratio of size and the internal diameter size of the ejection end of the ejector pipe is 0.3-0.8.
Preferably, the throat includes flare and extension, and the serrated end of the flare enters with the ejector pipe
End connection is penetrated, the constriction radius of the serrated end of the flare is 5-20mm；The extension end of the flare and the extension
Connection, and the radial direction of the extension towards the ejector pipe extends.
Preferably, the injection ratio of the refrigeration injection device is 1:35.
In addition, the present invention also provides a kind of liquid nitrogen refrigerating system, the liquid nitrogen refrigerating system includes liquid nitrogen container, heat exchange
Device, injection framed bent and injector, the cooling medium nozzle of the cooling medium delivery outlet of the liquid nitrogen container and the injection framed bent
Connection, the injector are stretched using the cooling injector provided by the invention, the cooling medium nozzle of the injection framed bent
Enter the throat of the injector, the cooling medium that liquid nitrogen container exports sprays after absorbing heat by heat exchanger from injector.
In addition, the present invention also provides a kind of refrigerated van type vehicle, described includes refrigerator carriage and liquid nitrogen refrigerating system, liquid nitrogen system
Cooling system includes liquid nitrogen feed system, injector and heat exchanger, and the injector and the heat exchanger are arranged in the refrigerator car
In compartment, the liquid nitrogen feed system is connected to for providing liquid nitrogen cooling medium, the liquid nitrogen feed system with the injector, institute
It states heat exchanger to be set between the liquid nitrogen feed system and the injector, for making liquid nitrogen endothermic gasification, the injector
Using the cooling injector provided by the invention, and the cooling medium nozzle of the liquid nitrogen feed system stretches into described draw
The throat of emitter.
Wherein, the liquid nitrogen feed system includes liquid nitrogen container, injection framed bent, the first solenoid valve and second solenoid valve, institute
Liquid nitrogen container is stated to be arranged in the outside of the refrigerator carriage；The injection framed bent is arranged in the refrigerator carriage, the injection
Framed bent is arranged at intervals with multiple rows of cooling medium nozzle, and often row is equipped at intervals with multiple cooling medium nozzles, each cooling
Medium nozzle is correspondingly arranged an injector；Heat exchanger setting the cooling medium nozzle and the liquid nitrogen container it
Between pipeline outside；First solenoid valve is arranged on the pipeline between the liquid nitrogen container and the heat exchanger, and described
Two solenoid valves are arranged on the pipeline between the heat exchanger and the cooling medium nozzle.
Preferably, the liquid nitrogen feed system further includes hand stop valve, and the hand stop valve is arranged in the liquid nitrogen
On pipeline between container and first solenoid valve.
Preferably, the refrigerated van type vehicle further includes controller and first temperature probe, the first temperature probe setting
Signal output end in the outside of the throat of the injector, and the first temperature probe is connected with the controller in a signal way.,
The real time temperature in refrigerator carriage that the controller is monitored according to the first temperature probe starts the liquid nitrogen refrigerating system
Operation.
Preferably, the refrigerated van type vehicle further includes second temperature probe, and the second temperature probe is arranged described cold
It hides on the outside of compartment, for obtaining the real-time temperature values on the outside of refrigerator carriage, the signal output end of the second temperature probe and institute
Controller signals connection is stated, the controller is obtained according to the real-time temperature values of the first temperature probe and second temperature probe
Temperature gap inside and outside the refrigerator carriage, and control according to the temperature gap unlatching quantity of the injector.
Preferably, the refrigerated van type vehicle further includes oxygen concentration sensor, and the oxygen concentration sensor is arranged in institute
It states in refrigerator carriage, the concentration for monitoring oxygen in the refrigerator carriage, the signal output end of the oxygen concentration sensor
It is connect with the signal input part signal of the controller.
The invention has the advantages that：
Refrigeration injection device provided by the invention comprising throat and ejector pipe, the internal diameter of ejector pipe its axis direction by
Cumulative big, the internal diameter of throat gradually increases from inside to outside in the axial direction of the ejector pipe, and cooling medium sprays into ejector pipe from throat,
And negative pressure is generated in throat, air is inhaled into ejector pipe, and cooling medium and air spray after being mixed in ejector pipe, due to cooling
The mixed lifting of the medium and air temperature of cooling medium, avoid ejector pipe nearby Cryogenic burns the phenomenon that.It is prior
It is that the ratio of the internal diameter size of the ejection end of throat's minimum diameter size and ejector pipe is 0.3-0.8, can improve refrigeration injection
The jet power of device improves the uniformity of temperature in compartment.
Liquid nitrogen refrigerating system provided by the invention not only can be to avoid due to using cooling injector provided by the invention
Cryogenic burns phenomenon, and the uniformity of temperature in compartment can be improved.
In addition, refrigerated van type vehicle provided by the invention, heat exchanger and injector are arranged in refrigerator carriage, liquid nitrogen supply system
For providing cooling medium, heat exchanger is arranged on the pipeline between liquid nitrogen feed system and injector system, and cooling medium is drawn
The partial heat in refrigerator carriage is absorbed before entering injector by heat exchanger, it is cooling after cooling medium enters injector
Medium further carries out heat exchange in injector with air, in this way can be to avoid cold to improve the temperature of cooling medium
Hide compartment in close to injector nearby because temperature is relatively low lead to frostbite the problem of, and due to throat's minimum diameter size with draw
The ratio for penetrating the internal diameter size of the ejection end of pipe is 0.3-0.8, can improve the jet power of refrigeration injection device, improve refrigeration
The uniformity of temperature in compartment.
Description of the drawings
Fig. 1 is the structural schematic diagram of refrigeration injection device in the embodiment of the present invention 1；
Fig. 2 is the structural schematic diagram of liquid nitrogen refrigerating system in the embodiment of the present invention 2；
Fig. 3 is the structural schematic diagram of liquid nitrogen refrigerated van type vehicle in the embodiment of the present invention 3.
Drawing reference numeral：1- throats, 2- ejector pipes, 3- liquid nitrogen containers, 4- cool down medium nozzle, 5- injectors, 6- refrigerator cars
Compartment, 7- heat exchangers, 8- injection framed bents, the first solenoid valves of 9-, 10- second solenoid valves, 11- flares, 12- extensions, 13- are manual
Shut-off valve, 14- controllers.
Specific implementation mode
The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention..
Embodiment 1
As shown in Figure 1, refrigeration injection device provided in this embodiment includes throat 1 and ejector pipe 2, the internal diameter of ejector pipe 2 exists
Its axis direction gradually increases, i.e. the internal diameter of ejector pipe 2 gradually increases from incidence end to ejection end, so that cooling medium and air
It is quickly mixed in the inside (ejection cavity) of ejector pipe 2 and carries out heat exchange.The incidence end in ejector pipe 2, and throat is arranged in throat 1
1 internal diameter gradually increases from inside to outside in the axial direction of ejector pipe 2, i.e., throat 1 is in horn-like.Preferably, 1 minimum diameter ruler of throat
The ratio of the internal diameter size Φ C of the ejection end of very little Φ B and ejector pipe 2 is 0.3-0.8, can be with when cooling medium sprays into throat
So that throat 1 is generated the negative pressure of bigger, is conducive to air and enters ejector pipe 2 with cooling medium, to improve the spray of refrigeration injection device
Ability is penetrated, so that refrigeration injection device is sprayed farther.Preferably, throat 1 and ejector pipe 2 are structure as a whole.
Throat 1 includes flare 11 and extension 12, and the serrated end of flare 11 is connect with the incidence end of ejector pipe 2, loudspeaker
The constriction radius R of the serrated end in portion 11 is 5-20mm；The extension end of flare 11 is connect with extension 12, and 12 court of extension
Extend to the radial direction of ejector pipe.Wherein, flare 11 makes cooling medium smoothly enter ejector pipe 2, while being conducive to produce
Raw negative pressure, admits air into ejector pipe 2；Extension 12 is conducive to connect and fix refrigeration injection device.
In a preferred embodiment of the present embodiment, the injection ratio of refrigeration injection device is 1:35.If cooling medium is
Nitrogen, then nitrogen flow rate is 52.4~117.2m/s, the mixed gas flow velocity of the jet port of corresponding ejector pipe 2 is up to 8.2
~18.3m/s is fully able to meet the heat exchange demand of general refrigerator carriage.
Embodiment 2
The present embodiment provides a kind of liquid nitrogen refrigerating systems.As shown in Fig. 2, liquid nitrogen refrigerating system includes liquid nitrogen container 3, injection
Device 5, heat exchanger 7, injection framed bent 8, the first solenoid valve 9 and second solenoid valve 10, liquid nitrogen container 3 are arranged in the outer of refrigerator carriage 6
Side；Injection framed bent 8 is arranged in refrigerator carriage 6, and injection framed bent 8 is arranged at intervals with multiple rows of cooling medium nozzle 4, and often between row
Every equipped with multiple cooling medium nozzles 4, each cooling medium nozzle 4 is correspondingly arranged an injector 5；The cooling of liquid nitrogen container 3 is situated between
Matter delivery outlet is connected to the cooling medium nozzle 4 of injection framed bent, and injector uses the cooling injector that embodiment 1 provides, cooling
Details are not described herein for the concrete structure of injector, and the cooling medium nozzle 4 of injection framed bent stretches into the throat of injector.Liquid nitrogen container
The cooling medium exported in 3 sprays after being absorbed heat by heat exchanger 7 from injector 5.
The nitrogen of high speed sprays into injector 5 at a high speed from the cooling medium nozzle 4 of injection framed bent, due to the internal diameter of throat 1
Become smaller, therefore negative pressuren zone can be formed in throat 1, draws to make low velocity fluid (air in such as refrigerator carriage) enter from throat 1
In emitter 5.Nitrogen and air are quickly sufficiently mixed in injector 5, after sprayed through cooling medium jet port.
Heat exchanger 7 is arranged on the pipeline between liquid nitrogen container 3 and injector 5, for making liquid nitrogen endothermic gasification；First electricity
Magnet valve 9 is arranged on the pipeline between liquid nitrogen container 3 and heat exchanger 7, and the first solenoid valve 9 is for controlling liquid nitrogen from liquid nitrogen container 3
Interior outflow；Second solenoid valve 10 is arranged on the pipeline between heat exchanger 7 and cooling medium nozzle 4, for controlling cooling medium
Nozzle 4 sprays liquid nitrogen.First solenoid valve 9 and second solenoid valve 10 may be used but be not limited to pneumatic diaphragm valve.
In order to avoid the first solenoid valve 9 and second solenoid valve 10 break down and cause liquid nitrogen refrigerating system that cannot normally transport
Row, liquid nitrogen refrigerating system further include hand stop valve 13, the setting of hand stop valve 13 liquid nitrogen container 3 and the first solenoid valve 9 it
Between pipeline on.
Embodiment 3
The present embodiment provides a kind of liquid nitrogen refrigerated van type vehicles.In conjunction with refering to shown in Fig. 2 and Fig. 3, liquid nitrogen refrigerated van type vehicle packet
Include refrigerator carriage 6 and liquid nitrogen refrigerating system, liquid nitrogen refrigerating system includes liquid nitrogen feed system, injector 5, injector 5 and heat exchange
Device 7 is arranged in refrigerator carriage 6.Liquid nitrogen feed system is connected to injector 5, and medium is cooled down for providing liquid nitrogen to injector 5.
Heat exchanger 7 is set between liquid nitrogen feed system and injector 5, for making liquid nitrogen endothermic gasification, while being reduced in refrigerator carriage 6
The temperature of air.Injector 5 uses the cooling injector of embodiment 1, and the cooling medium nozzle 4 of liquid nitrogen feed system stretches into
The throat 1 of injector 5.
In the present embodiment, liquid nitrogen absorbs air in refrigerator carriage 6 before entering injector 5 by heat exchanger 7
Middle partial heat has carried out primary heat exchange；After liquid nitrogen enters injector 5, the air for entering injector 5 together carries out
Secondary heat exchange, liquid nitrogen are gasified, and temperature is elevated, while the air themperature for entering injector 5 is lowered, air and nitrogen
Mixed gas is sprayed by injector 5, and the temperature of the mixed gas temperature for liquid nitrogen increases significantly, avoids injector
5 ambient temperatures are too low, to reduce the risk of frostbite.
Preferably, the nozzle exit area setting of 7 face injector 5 of heat exchanger, not only can accelerate the heat absorption of liquid nitrogen, and
And the reduction of 6 temperature of refrigerator carriage can be accelerated.
In the present embodiment, the top in refrigerator carriage 6 is arranged in injection framed bent 8, and two rows are arranged in injection framed bent 8
Cooling medium nozzle 4, the length direction for often arranging cooling medium nozzle 4 along refrigerator carriage 6 are arranged, and two intervals of often row's setting
Four cooling medium nozzles 4 are arranged in the cooling medium nozzle 4 of setting, i.e. injection framed bent 8 altogether, and each cooling medium nozzle 4 corresponds to
One injector 5.The mixed gas of nitrogen and air that injector 5 sprays can be in 6 internal circulation flow of refrigerator carriage, to drop
Temperature in low refrigerator carriage 6.
Refrigerated van type vehicle provided in this embodiment not only can manually control liquid nitrogen refrigerating according to the temperature in refrigerator carriage 6
System operation can also automatically control liquid nitrogen refrigerating system operation.
Specifically, refrigerated van type vehicle further includes controller 14 and first temperature probe (not shown), and the first temperature is visited
Head is arranged in the outside of the throat of injector 5, and the signal output end of first temperature probe is connect with 14 signal of controller, control
Real time temperature determines when to start liquid nitrogen refrigerating system operation in the refrigerator carriage that device 14 is monitored according to first temperature probe.Example
Such as, when controller 14 judges that real time temperature is higher than preset temperature, controller 14 opens refrigeration mode, while starting liquid nitrogen refrigerating
Liquid nitrogen is sent into the throat of injector 5 by system, liquid nitrogen feed system from being pressurized, and nitrogen high speed sprays (about 50-100m/s), nitrogen
Air while gas blowout goes out in a large amount of carriage bodies of injection enters in ejector pipe 2, and compartment is blown at a high speed after nitrogen and air mixed heat transfer
In vivo, to which realization is to the cooling of refrigerator carriage 6, the purpose of cold insulation.After refrigeration carriage body 6 reaches set temperature, controller 14
Acquiescence precooling is completed, and the first solenoid valve 9 that refrigeration simultaneously closes off liquid nitrogen feed system is stopped.
Preferably, refrigerated van type vehicle provided in this embodiment further includes second temperature probe (not shown), the second temperature
Degree probe is arranged in the outside of refrigerator carriage 6, for obtaining the real-time temperature values on the outside of refrigerator carriage, the letter of second temperature probe
Number output end is connect with 14 signal of controller, and controller 14 is according to the real-time temperature values of first temperature probe and second temperature probe
The temperature gap inside and outside refrigerator carriage is obtained, and controls the unlatching quantity of injector 5 according to temperature gap.
After the temperature in refrigerator carriage 6 reaches set temperature, liquid nitrogen refrigerating system is out of service, that is, is in heat preservation shape
State.When the inside and outside heat exchange of refrigerator carriage 6 finally makes the temperature rise in refrigerator carriage 6 to liquid nitrogen refrigerating system again
When unlatching, controller 14 judges according to the real-time monitor value of first temperature probe and second temperature probe inside and outside refrigerator carriage 6
Temperature difference, and according to the unlatching quantity of temperature gap control injector 5, to reach the flow of control liquid nitrogen so that liquid nitrogen
Inlet is equal to the various thermic loads in refrigerator carriage 6, is finally reached and maintains temperature in refrigerator carriage 6 by fixed flow
In its operating temperature range, to reduce the fluctuation of 6 temperature of refrigerator carriage, the uniformity of temperature in refrigerator carriage 6 is improved.
It can be appreciated that the unlatching quantity of injector 5 can be controlled by operated pneumatic valve, each injector 5 corresponds to a gas
Movable valve.The inlet end in injector 5 is arranged in operated pneumatic valve, and the control terminal of operated pneumatic valve is connect with 14 signal of controller,
Controller 14 controls the break-make of operated pneumatic valve.Controller 14 is according to the real-time monitor value of first temperature probe and second temperature probe
Operated pneumatic valve is controlled, the unlatching quantity of injector 5 is controlled by operated pneumatic valve so that liquid nitrogen inlet is equal in refrigerator carriage 5
Various thermic loads, thus by the thermal evenness controlling in refrigerator carriage 5 in ± 0.5 DEG C.
In the present embodiment, liquid nitrogen container 3 is cylindrical pressure vessel, is vacuum insulation structure.Liquid nitrogen container 3 it is interior
Layer is made of stainless steel plate, is directly contacted with liquid nitrogen；Outer layer is general steel plate or stainless steel plate, is wound between internal layer and outer layer exhausted
Hot material, setting adsorbent box and adiabatic support, and be evacuated, vacuum degree is 1.33 × 10-3pa, to ensure liquid nitrogen container
Daily boil-off-rate be less than 0.8%.
After liquid nitrogen vaporization, rapid spatial expansion is to original about 650 times, if the nitrogen to gasify in refrigerator carriage 6
Gas cannot be discharged in time, then can cause air pressure in refrigerator carriage 6 that will rise rapidly, and car body deformation, vehicle can be caused when serious
Compartment door is inflated the failures such as to push open.Therefore, refrigerated van type vehicle further includes safe ventilation valve, and safe ventilation valve is arranged in refrigerator carriage
On, signal input part is connect with 14 signal of controller.Pressure sensor is set in refrigerator carriage 6, for monitoring refrigerator carriage 6
Interior atmospheric pressure.When air pressure rises to preset value in compartment, controller 14 opens safe ventilation valve, is exhausted cold to reduce
The pressure in compartment 6 is hidden, to avoid the generation of the above failure.
In another preferred embodiment of the present invention, refrigerated van type vehicle further includes oxygen concentration sensor, and oxygen concentration passes
Sensor is arranged in refrigerator carriage 5, the concentration for monitoring oxygen in refrigerator carriage, the signal output end of oxygen concentration sensor
It is connect with the signal input part signal of controller 14, controller 14 is according to the oxygen density value of oxygen concentration sensor and default
Oxygen density value judges whether refrigerator carriage 6 needs denitrogen of taking a breath.If exceeded (the oxygen concentration of nitrogen gas concn in refrigerator carriage 6
It is insufficient), controller 14 is opened the electronic lock being arranged in the car door of refrigerator carriage 6 and is opened, to which car door is opened denitrogen,
It is simultaneously emitted by alarm signal, warning device is made to send out alarm, to prompt staff to be prohibited from entering refrigerator carriage 6 at this time.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention belong to the scope of protection of present invention.
Claims (10)
1. a kind of refrigeration injection device, the refrigeration injection device includes throat and ejector pipe, which is characterized in that the ejector pipe it is interior
Diameter gradually increases in its axis direction, and the incidence end in the ejector pipe is arranged in the throat, and the internal diameter of the throat is in institute
The axial direction for stating ejector pipe gradually increases from inside to outside, the internal diameter of throat's minimum diameter size and the ejection end of the ejector pipe
The ratio of size is 0.3-0.8.
2. refrigeration injection device according to claim 1, which is characterized in that the throat includes flare and extension, institute
The serrated end for stating flare is connect with the incidence end of the ejector pipe, and the constriction radius of the serrated end of the flare is 5-
20mm；The extension end of the flare is connect with the extension, and the extension is towards the radial direction of the ejector pipe
Extend.
3. refrigeration injection device according to claim 1, which is characterized in that the injection ratio of the refrigeration injection device is 1:35.
4. a kind of liquid nitrogen refrigerating system, the liquid nitrogen refrigerating system includes liquid nitrogen container, heat exchanger, injection framed bent and injector,
The cooling medium delivery outlet of the liquid nitrogen container is connected to the cooling medium nozzle of the injection framed bent, which is characterized in that described
Injector is stretched into using the cooling injector described in claim 1-3 any one, the cooling medium nozzle of the injection framed bent
The throat of the injector, the heat exchanger is set between the liquid nitrogen container and the injector, for making liquid nitrogen absorb heat
Gasification.
5. a kind of refrigerated van type vehicle, described includes refrigerator carriage and liquid nitrogen refrigerating system, and the liquid nitrogen refrigerating system includes liquid nitrogen
Feed system, injector and heat exchanger, the injector and the heat exchanger are arranged in the refrigerator carriage, and the liquid nitrogen supplies
Medium is cooled down for providing liquid nitrogen to system, the liquid nitrogen feed system is connected to the injector, and the heat exchanger is set to
Between the liquid nitrogen feed system and the injector, for making liquid nitrogen endothermic gasification, which is characterized in that the injector uses
Cooling injector described in claim 1-3 any one, and the cooling medium nozzle of the liquid nitrogen feed system stretches into institute
State the throat of injector.
6. refrigerated van type vehicle according to claim 5, which is characterized in that the liquid nitrogen feed system include liquid nitrogen container,
Injection framed bent, the first solenoid valve and second solenoid valve, the liquid nitrogen container are arranged in the outside of the refrigerator carriage；The injection
Framed bent is arranged in the refrigerator carriage, and the injection framed bent is arranged at intervals with multiple rows of cooling medium nozzle, and often row interval
Equipped with multiple cooling medium nozzles, each cooling medium nozzle is correspondingly arranged an injector；The heat exchanger setting
The outside of pipeline between the cooling medium nozzle and the liquid nitrogen container；The first solenoid valve setting is held in the liquid nitrogen
On pipeline between device and the heat exchanger, second solenoid valve setting the heat exchanger and the cooling medium nozzle it
Between pipeline on.
7. refrigerated van type vehicle according to claim 6, which is characterized in that the liquid nitrogen feed system further includes manual shutoff
Valve, the hand stop valve are arranged on the pipeline between the liquid nitrogen container and first solenoid valve.
8. refrigerated van type vehicle according to claim 6, which is characterized in that the refrigerated van type vehicle further includes controller and
One temp probe, the first temperature probe are arranged in the outside of the throat of the injector, and the first temperature probe
Signal output end is connected with the controller in a signal way., in the refrigerator carriage that the controller is monitored according to the first temperature probe
Real time temperature start liquid nitrogen refrigerating system operation.
9. refrigerated van type vehicle according to claim 8, which is characterized in that the refrigerated van type vehicle further includes that second temperature is visited
Head, the second temperature probe is arranged on the outside of the refrigerator carriage, for obtaining the real-time temperature values on the outside of refrigerator carriage, institute
The signal output end for stating second temperature probe is connected with the controller in a signal way., and the controller is according to the first temperature probe
The temperature gap inside and outside the refrigerator carriage is obtained with the real-time temperature values of second temperature probe, and according to the temperature gap control
Make the unlatching quantity of the injector.
10. refrigerated van type vehicle according to claim 8, which is characterized in that the refrigerated van type vehicle further includes oxygen concentration
Sensor, the oxygen concentration sensor are arranged in the refrigerator carriage, for monitoring the dense of oxygen in the refrigerator carriage
Degree, the signal output end of the oxygen concentration sensor are connect with the signal input part signal of the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810533408.3A CN108800697A (en) | 2018-05-29 | 2018-05-29 | A kind of refrigeration injection device, liquid nitrogen refrigerating system and refrigerated van type vehicle |
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| CN201810533408.3A CN108800697A (en) | 2018-05-29 | 2018-05-29 | A kind of refrigeration injection device, liquid nitrogen refrigerating system and refrigerated van type vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110722959A (en) * | 2019-11-15 | 2020-01-24 | 上海海洋大学 | Roof-mounted external cold air introducing system for small refrigerator |
| CN111861334A (en) * | 2020-07-23 | 2020-10-30 | 北京京东振世信息技术有限公司 | Circulation monitoring method, weighing scanning method and device of heat preservation unit and warehouse |
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| CN1080389A (en) * | 1992-06-10 | 1994-01-05 | 波克股份有限公司 | The method and apparatus of cooling |
| CN2190043Y (en) * | 1993-11-25 | 1995-02-22 | 赵安平 | Refrigerating lorry |
| US6408632B1 (en) * | 2000-06-28 | 2002-06-25 | Michael D. Cashin | Freezer and plant gas system |
| WO2013190842A1 (en) * | 2012-06-20 | 2013-12-27 | 日曹エンジニアリング株式会社 | Cooling method and cooling device |
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| CN1080389A (en) * | 1992-06-10 | 1994-01-05 | 波克股份有限公司 | The method and apparatus of cooling |
| CN2190043Y (en) * | 1993-11-25 | 1995-02-22 | 赵安平 | Refrigerating lorry |
| US6408632B1 (en) * | 2000-06-28 | 2002-06-25 | Michael D. Cashin | Freezer and plant gas system |
| WO2013190842A1 (en) * | 2012-06-20 | 2013-12-27 | 日曹エンジニアリング株式会社 | Cooling method and cooling device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110722959A (en) * | 2019-11-15 | 2020-01-24 | 上海海洋大学 | Roof-mounted external cold air introducing system for small refrigerator |
| CN111861334A (en) * | 2020-07-23 | 2020-10-30 | 北京京东振世信息技术有限公司 | Circulation monitoring method, weighing scanning method and device of heat preservation unit and warehouse |
| CN111861334B (en) * | 2020-07-23 | 2021-12-14 | 北京京东振世信息技术有限公司 | Circulation monitoring method, weighing scanning method and device of heat preservation unit and warehouse |
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