CN106895640A - A kind of superposition type is segmented quick-frozen and cold and heat combined supply instant freezer - Google Patents
A kind of superposition type is segmented quick-frozen and cold and heat combined supply instant freezer Download PDFInfo
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- CN106895640A CN106895640A CN201710135866.7A CN201710135866A CN106895640A CN 106895640 A CN106895640 A CN 106895640A CN 201710135866 A CN201710135866 A CN 201710135866A CN 106895640 A CN106895640 A CN 106895640A
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- 239000007788 liquid Substances 0.000 claims abstract description 36
- 239000003507 refrigerant Substances 0.000 claims abstract description 30
- 238000000926 separation method Methods 0.000 claims abstract description 20
- 239000002826 coolant Substances 0.000 claims abstract description 15
- 239000006200 vaporizer Substances 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000007710 freezing Methods 0.000 abstract description 16
- 230000008014 freezing Effects 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 11
- 235000013410 fast food Nutrition 0.000 abstract description 10
- 235000013305 food Nutrition 0.000 abstract description 10
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000013459 approach Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 23
- 238000005057 refrigeration Methods 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009920 food preservation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
- 239000008274 jelly Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002918 waste heat 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
- F25D13/00—Stationary devices, e.g. cold-rooms
- F25D13/06—Stationary devices, e.g. cold-rooms with conveyors carrying articles to be cooled through the cooling space
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
-
- 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
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
Being segmented quick-frozen and cold and heat combined supply instant freezer the invention discloses a kind of superposition type includes coolant compressor.The present invention is by condenser, refrigerant choke valve, refrigerant temperature end evaporator, heat-exchanger pump, boiler, condenser/evaporator, CO2Gas compressor, CO2Gas-liquid separation circulation barrel, CO2Middle temperature evaporator, CO2Cryogenic vaporizer, CO2Choke valve, roller, segmented baffle, CO2Circulating pump, conveyor chain, counterbalance valve etc. are constituted.The present invention realizes total energy approach and the segmented of food is quick-frozen, can reduce the energy consumption of fast food freezing process and the comprehensive energy utilization ratio of raising system.
Description
Technical field
It is to be related to one kind to utilize fast food freezing different phase heat release in particular the present invention relates to fast food freezing field
Characteristic and the superposition type of refrigeration system condensation heat comprehensive utilization are segmented quick-frozen and cold and heat combined supply instant freezer.
Background technology food improves fast food freezing process by a quick-frozen method for being to solve food preservation for a long time
Efficiency turns into the major tasks of this area researcher.A kind of new food processing station-service intelligence instant freezer
（CN201610520745.X）Disclose it is a kind of including cabinet, discharging bin, refrigerating evaporator, blower fan quick-frozen machine, Neng Gouyuan
Journey controlled in wireless, intelligent level are higher, practicality is stronger；Seawater instant freezer peculiar to vessel（CN201620856929.9）It is open a kind of
Seawater instant freezer peculiar to vessel, with household freezer, water tank and the supporting refrigeration unit of household freezer, induction system and for containing marine products
The hanging basket of product；Efficient tunnel like freezing machine（ CN201620555019.7）Entering for heat room will be extended in heat room and heat room
Transporting reticulation belt outside material mouth and discharging opening, solves the cryogenic gas for carrying out flash-pot present in prior art in cyclic process
Middle energy loss is big, causes to be raised for the cold-gas temperature of fast food freezing, directly affects the quick-frozen effect and quality of food
Deng technical problem；A kind of screw fast refreezer with differential conveying device（CN105712066A）There is provided a kind of defeated with differential
The screw fast refreezer of device is sent, superelevation phenomenon of the article caused by accumulation can be avoided, the stabilization of equipment operation can be effectively improved
Property；A kind of pair of van-type liquid nitrogen tunnel type instant freezer（CN105091446A）Propose a kind of including tunnel chamber, circulating type conveyer belt
Instant freezer, isolated using top liquid nitrogen plugging device between each chamber, operating room's liquid nitrogen service efficiency is high, can effectively drop
The quick-frozen cost of low material；Instant freezer（CN103791671A）Disclose a kind of including freezing the library, be provided with cold in freezer body
Freeze room and the instant freezer of the air supplying chamber of device of blowing a cold wind over is installed, bonding and goods and conveyer belt adhesion between goods can be avoided
Problem, improves production efficiency and product quality, and refrigerating capacity is fully used, and reduces the load of refrigeration machine, reaches energy-conservation
Purpose;A kind of Flat fast-freezer (CN103453714A) discloses a kind of with including body, freezing blower fan and operating platform quick-frozen
Machine, improves quick-freezer for food operating efficiency, reduces energy resource consumption;One operation method for dragging many intellectuality instant freezers
(CN103216994A) the shortcomings of solving the defrost of existing instant freezer shortage, background information service and intelligent control function, quick-frozen behaviour
Make it is convenient it is laborsaving, the features such as intelligent automation degree is high;Immersed quick refrigerating machine (CN103040076A) provides a kind of including low temperature
The instant freezer of refrigeration unit, refrigerating medium pond and conveying assembly, freezing speed is fast, and the time freezed is short, empty with smaller occupation of land
Between and less energy consumption;A kind of instant freezer (CN103017448A) propose it is a kind of include frame, quick-frozen storehouse, charging basket, power transmission shaft,
The instant freezer of circulating fan, charging basket turning device, uses manpower and material resources sparingly, and energy-conserving and environment-protective, production efficiency is high；A kind of instant freezer injection
Air channel (CN102735008A) discloses a kind of instant freezer including insulation body, feed belt, heat exchanger, heat exchange blower fan etc., freezes
Knot speed is high, and freezing speed is 2 times or so of existing straight line instant freezer；Pulse-type high efficiency steel band instant freezer (CN102384622A)
It is included in the library, evaporator, cold air chamber, centrifugal blower, up-draught room, nozzle, steel band etc..Faster, energy consumption is reduced freezing speed；
Three temperature section fast food freezing methods and three temperature section quick-freezer for food (CN102058139A) disclose one kind include by precooling cavity,
Quick-frozen the library, refrigeration system that crystallization cavity, three cavitys of deep cooling cavity are constituted, heat transfer temperature difference are small, reach energy-conservation purpose；Single-freeze
Machine (CN101033905) is disclosed including shell and position evaporator in the inner, plenum chamber and loaded on the circulated air in plenum chamber
Machine, air delivery duct, return air chamber, air -return duct quick-frozen and, there is energy saving, quick-frozen efficiency high, quick-frozen food quality better.
The announced technology of these inventions serves facilitation for the development of instant freezer, but has clearly disadvantageous, major embodiment
In the following areas：
（1）The comprehensive utilization of energy rate of system is not high：
（2）It is not bound with fast food freezing operational characteristic to carry out process adjustments, although the temperature section fast food freezing method of patent three and three
Temperature section quick-freezer for food (CN102058139A) proposes the quick-frozen concept of segmented, but specific real not in cooling mode
It is existing.
The content of the invention
Quick-frozen and cold and heat combined supply instant freezer is segmented the invention provides a kind of superposition type, it is therefore an objective to cascade refrigeration is utilized, to speed
Jelly machine provides 3 kinds of different evaporating temperatures, realizes that the segmentation of instant freezer is quick-frozen, while being heated using the condensation waste heat of refrigeration system
Hot water, for other operations during fast food freezing, so as to realize the total energy approach of quick-frozen process, and improves quick-frozen effect
Rate and quick-frozen food quality.
To realize the purpose of the present invention, using following technical scheme：
A kind of superposition type is segmented quick-frozen and cold and heat combined supply instant freezer, and the conveyer of instant freezer is made up of roller and conveyor chain；
The refrigerant outlet of coolant compressor connects the refrigerant inlet of condenser, and the refrigerant outlet of condenser connects first respectively
Branch road and the second branch road；The tie point passes through choke valve one, refrigerant temperature end evaporator and the counterbalance valve for setting gradually
The refrigerant inlet of one connection coolant compressor；Second branch road passes through the choke valve two, condenser/evaporator for setting gradually
With the refrigerant inlet that counterbalance valve two connects coolant compressor；The water inlet of leaving condenser water mouthful connection boiler, boiler
Delivery port by heat-exchanger pump connect condenser water inlet；The liquid CO of condenser/evaporator2Outlet connection CO2Gas-liquid separation is circulated
Bucket, CO2The liquid outlet of gas-liquid separation circulation barrel passes through CO2Circulating pump connects CO respectively2Middle temperature evaporator inlet and the 3rd
Road, CO2Middle temperature evaporator outlet connects CO2Gas-liquid separation circulation barrel gas access；3rd branch road passes through what is set gradually
CO2Choke valve, CO2Cryogenic vaporizer and CO2Gas compressor connection condenser/evaporator gas access, CO2Gas-liquid separation circulation barrel
Gas vent connection condenser/evaporator gas access.
The refrigerant temperature end evaporator and CO2Between middle temperature evaporator and CO2Middle temperature evaporator and CO2Low-temperature evaporation
Segmented baffle is respectively provided between device.
Compared with prior art, the beneficial effects of the invention are as follows：
The condenser of chiller refrigeration system is water-cooled condenser in the present invention, and condenser heat rejection is used to heat cooling water, heats
Water afterwards is used for other fast food freezing techniques, and such as ticket soup realizes the comprehensive utilization of energy.
Counterbalance valve is respectively mounted in the present invention in coolant compressor two-way return line, back pressure has been adjusted, made back
Gas is steady, reduces impact.
Pass through CO in the present invention2Gas-liquid separation circulation barrel, CO2Circulating pump and CO2Choke valve was realized required for the quick-frozen stage
In gentle low temperature.
Brief description of the drawings
Fig. 1 show superposition type and is segmented quick-frozen and cold and heat combined supply instant freezer structural representation.
Specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing and instantiation.
Superposition type of the present invention is segmented quick-frozen and cold and heat combined supply instant freezer structural representation as shown in figure 1, by refrigerant pressure
Contracting machine 1, condenser 2, the 3-1 of choke valve one, the 3-2 of choke valve two, refrigerant temperature end evaporator 4, heat-exchanger pump 5, boiler 6 is cold
Solidifying evaporator 7, CO2Gas compressor 8, CO2Gas-liquid separation circulation barrel 9, CO2Middle temperature evaporator 10, CO2Cryogenic vaporizer
11, CO2Choke valve 12, roller 13, segmented baffle 14, CO2Circulating pump 15, conveyor chain 16, the 17-1 of counterbalance valve one, counterbalance valve
Two 17-2.Wherein refrigerant uses R404A.
The conveyer of instant freezer is made up of roller 13 and conveyor chain；The refrigerant outlet of the coolant compressor 1
The refrigerant inlet of condenser 2 is connected, the refrigerant outlet of condenser connects tie point and the second branch road respectively；Described first
The 3-1 of choke valve one, refrigerant temperature end evaporator 4 and the 17-1 of counterbalance valve one that branch road passes through to set gradually connect refrigerant compression
The refrigerant inlet of machine 1；Second branch road passes through the 3-2 of choke valve two, condenser/evaporator 7 and the counterbalance valve two for setting gradually
17-2 connects the refrigerant inlet of coolant compressor 1；The delivery port of condenser 2 connects the water inlet of boiler 6, boiler 6
Delivery port connects the water inlet of condenser 2 by heat-exchanger pump 5；The liquid CO of condenser/evaporator 72Outlet connection CO2Gas-liquid separation is circulated
Bucket 9, CO2The liquid outlet of gas-liquid separation circulation barrel 9 passes through CO2Circulating pump 15 connects CO respectively2The middle entrance of temperature evaporator 10 and
3rd branch road, CO2The middle outlet of temperature evaporator 10 connection CO2The gas access of gas-liquid separation circulation barrel 9；3rd branch road by according to
The CO of secondary setting2Choke valve, CO2Cryogenic vaporizer 11 and CO2The connection condenser/evaporator 7 of gas compressor 8 gas access, CO2Gas
Liquid separates gas vent connection condenser/evaporator 7 gas access of circulation barrel 9.
The refrigerant temperature end evaporator 4 and CO2Between middle temperature evaporator 10 and CO2Middle temperature evaporator 10 and CO2Low temperature
Segmented baffle 14 is respectively provided between evaporator 11.
Counterbalance valve 17 is respectively mounted in described coolant compressor two-way return line, back pressure has been adjusted, made back
Gas is steady, reduces impact；Described CO2Gas-liquid separation circulation barrel 9, CO2Circulating pump 15 and CO2Choke valve 12 realizes quick-frozen rank
Gentle low temperature in required for section.
The course of work is as follows：
R404A refrigerants enter condenser 2 by the compression of coolant compressor 1, and R404A heat releases are by boiler 6 within the condenser
The middle water circulated by heat-exchanger pump 5 absorbs, while the water heating of circulation becomes hot water.Condensed refrigerant point two-way is passed through respectively
Choke valve 3 is crossed, all the way into the refrigerant temperature end evaporator 4 of instant freezer, evaporation of absorbing heat there returns to coolant compressor 1
Muffler, cause a temperature relatively high；Enter condenser/evaporator 7 all the way in addition, heat absorption evaporation makes CO2Gas turns into
The muffler of coolant compressor 1 is returned to after liquid, the gas of two-way is adjusted to phase by counterbalance valve 17 respectively before mixing
With coolant compressor 1 is mixed into after pressure, so circulation.
To CO2Condenser/evaporator 7 is condensed into the CO of liquid for circulation2Into CO2Gas-liquid separation circulation barrel 9, carries out CO2
Gas-liquid separation, CO2Liquid is from CO2The bottom of gas-liquid separation circulation barrel 9 enters CO2Circulating pump 15, CO2Liquid is from CO2Circulating pump 15
Out it is divided into two-way afterwards, CO is directly entered all the way2Middle temperature evaporator 10, gasification heat absorption, reaches a middle temperature environment, subsequently into
CO2Gas-liquid separation circulation barrel 9 carries out gas-liquid separation；In addition all the way by CO2Choke valve 12 reaches lower evaporating temperature and enters
CO2Cryogenic vaporizer 11, gasification heat absorption, gas CO2Subsequently into CO2Gas compressor 8, is compressed to middle temperature, discharges CO2Gas
Compressor 8, the gas CO of discharge2With CO2Condensed into condenser/evaporator 7 after the gas mixing that gas-liquid separation circulation barrel 9 is isolated
It is liquid CO2, so circulation.
Quick-frozen food enters from temperature end evaporator 4, under the transmission of roller 13 and conveyor chain 16, respectively through refrigeration
Agent temperature end evaporator 4, CO2Middle temperature evaporator 10 and CO2Cryogenic vaporizer 11, completes quick-frozen process, finally from CO2Low temperature steams
Left at hair device 11.
The above is only the preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications
Also should be regarded as protection scope of the present invention.
Claims (2)
1. a kind of superposition type is segmented quick-frozen and cold and heat combined supply instant freezer, and the conveyer of instant freezer is by roller and conveyor chain group
Into；Characterized in that, the refrigerant outlet of coolant compressor connects the refrigerant inlet of condenser, the refrigerant of condenser
Outlet connects tie point and the second branch road respectively；The tie point passes through choke valve one, the refrigerant high temperature for setting gradually
End evaporator and counterbalance valve one connect the refrigerant inlet of coolant compressor；Second branch road passes through the throttling for setting gradually
Valve two, condenser/evaporator and counterbalance valve two connect the refrigerant inlet of coolant compressor；Leaving condenser water mouthful connection boiler
Water inlet, the delivery port of boiler connects condenser water inlet by heat-exchanger pump；
The liquid CO of condenser/evaporator2Outlet connection CO2Gas-liquid separation circulation barrel, CO2The liquid outlet of gas-liquid separation circulation barrel
By CO2Circulating pump connects CO respectively2Middle temperature evaporator inlet and the 3rd branch road, CO2Middle temperature evaporator outlet connects CO2Gas-liquid
Separate circulation barrel gas access；3rd branch road passes through the CO for setting gradually2Choke valve, CO2Cryogenic vaporizer and CO2Gas
Compressor connection condenser/evaporator gas access, CO2The gas vent connection condenser/evaporator gas of gas-liquid separation circulation barrel enters
Mouthful.
2. superposition type according to claim 1 is segmented quick-frozen and cold and heat combined supply instant freezer, it is characterised in that the refrigerant
Temperature end evaporator and CO2Between middle temperature evaporator and CO2Middle temperature evaporator and CO2Segmentation is respectively provided between cryogenic vaporizer
Baffle plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710135866.7A CN106895640A (en) | 2017-03-09 | 2017-03-09 | A kind of superposition type is segmented quick-frozen and cold and heat combined supply instant freezer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710135866.7A CN106895640A (en) | 2017-03-09 | 2017-03-09 | A kind of superposition type is segmented quick-frozen and cold and heat combined supply instant freezer |
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| Publication Number | Publication Date |
|---|---|
| CN106895640A true CN106895640A (en) | 2017-06-27 |
Family
ID=59184428
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710135866.7A Pending CN106895640A (en) | 2017-03-09 | 2017-03-09 | A kind of superposition type is segmented quick-frozen and cold and heat combined supply instant freezer |
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| Country | Link |
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| CN (1) | CN106895640A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107625116A (en) * | 2017-10-27 | 2018-01-26 | 福建安兴食品有限公司 | A kind of seafood mushroom vacuum dehydration crisp chip |
| CN107691629A (en) * | 2017-11-10 | 2018-02-16 | 天津商业大学 | A kind of dry ice fruits and vegetables freeze refrigeration system |
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| JP2004170007A (en) * | 2002-11-20 | 2004-06-17 | Hachiyo Engneering Kk | Binary refrigerating system with ammonia and carbon dioxide combined |
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| CN102058139A (en) * | 2010-11-29 | 2011-05-18 | 天津商业大学 | Three-temperature section food quick freezing method and three-temperature section food quick freezer |
| CN103486754A (en) * | 2013-08-26 | 2014-01-01 | 安徽亿瑞深冷能源科技有限公司 | Energy-saving middle temperature refrigerant/middle temperature refrigerant cascade refrigeration system |
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2017
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|---|---|---|---|---|
| JP2004170007A (en) * | 2002-11-20 | 2004-06-17 | Hachiyo Engneering Kk | Binary refrigerating system with ammonia and carbon dioxide combined |
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| CN102058139A (en) * | 2010-11-29 | 2011-05-18 | 天津商业大学 | Three-temperature section food quick freezing method and three-temperature section food quick freezer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107625116A (en) * | 2017-10-27 | 2018-01-26 | 福建安兴食品有限公司 | A kind of seafood mushroom vacuum dehydration crisp chip |
| CN107691629A (en) * | 2017-11-10 | 2018-02-16 | 天津商业大学 | A kind of dry ice fruits and vegetables freeze refrigeration system |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170627 |
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| WD01 | Invention patent application deemed withdrawn after publication |