CN109798684A - It is a kind of for impregnate freezing indirect refrigeration system - Google Patents
It is a kind of for impregnate freezing indirect refrigeration system Download PDFInfo
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- CN109798684A CN109798684A CN201910178448.5A CN201910178448A CN109798684A CN 109798684 A CN109798684 A CN 109798684A CN 201910178448 A CN201910178448 A CN 201910178448A CN 109798684 A CN109798684 A CN 109798684A
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- dipping
- refrigerating
- refrigeration unit
- indirect
- freezing
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Abstract
The invention discloses a kind of for impregnating the indirect refrigeration system of freezing, the indirect refrigeration system includes the first cooling cycle system and dipping refrigerating circulation system, first cooling cycle system includes main refrigeration unit 1, evaporative condenser 2 and main refrigeration unit heat exchanger 3, and the dipping refrigerating circulation system includes water storage pool 4, refrigerating water pump 5, dipping freezing tank 6 and circulating pump 7；The main refrigeration unit 1 uses single machine two-stage screw bolt compressor, and the main refrigeration unit heat exchanger 3 is totally submerged in water storage pool 4；The refrigerating medium containing Water Dispersible Polyisocyanates is used in the dipping refrigerating circulation system.
Description
Technical field
The present invention relates to low-temperature refrigeration technology field more particularly to it is a kind of for impregnate freezing indirect refrigeration system.
Background technique
Food safety and cold chain construction enter high-speed development period, the backbone ring that freezer circulates as food low-temperature at present
Section, is crucial the links of entire cold chain.It is being with air using traditional for aquatic products and meat products
When medium is freezed, due to being more than 40 minutes at a temperature of -4 DEG C~-1 DEG C of food, ice crystal is also just consequently formed.At this moment by
Freeze the outer density with intracellular fluid of object cell to be changed, pressure also start it is unbalanced, along with the edge ratio of ice slag
Sharper, cell wall can be punctured quickly under double action.As a result, intracellular fluid be lost, full nutrition therein also with
Loss.So food after thawing, people, which taste also, has very big difference with fresh food.
It then can be quickly by food cooling to -5 using the dipping Refrigeration Technique that refrigerating medium directly freezes food
DEG C hereinafter, to preventing cell liquid from crystallizing.But when being freezed for large batch of food, due to food and refrigerating medium it
Between heat exchange it is too big, required matched cooling unit power number is higher, and refrigeration unit is needed to be switched on for a long time, to cause into
This is significantly increased.
It can be seen that being badly in need of one kind in this field at present can run at lower cost, and realize low to the progress of a large amount of food
Temperature impregnates quick-frozen Refrigeration Technique.
Summary of the invention
The first technical problem to be solved by the present invention, which is to provide one kind, can in high volume carry out impregnating quick-frozen indirect system
Cooling system, and the operation cost that the refrigeration system can more have been saved with the instant-frozen system in compared with the existing technology.
In order to solve the above-mentioned technical problems, the present invention provides a kind of for impregnating the indirect refrigeration system of freezing, packet
The first cooling cycle system and dipping refrigerating circulation system are included, first cooling cycle system includes main refrigeration unit 1, evaporation
Condenser 2 and main refrigeration unit heat exchanger 3, the dipping refrigerating circulation system include water storage pool 4, refrigerating water pump 5, dipping freezing
Slot 6 and circulating pump 7；The main refrigeration unit 1 uses single machine two-stage screw bolt compressor, and the main refrigeration unit heat exchanger 3 is completely
It is immersed in water storage pool 4；The refrigerating medium containing Water Dispersible Polyisocyanates is used in the dipping refrigerating circulation system.
In one embodiment, 1 refrigerant of main refrigeration unit uses R404A.
In one embodiment, the main refrigeration unit heat exchanger 3 uses the coil exchanger of 16Mn steel pipe.
In one embodiment, the specific ingredient of the refrigerating medium be by mass ratio be 30%~45% potassium formate,
15%~27% pentaerythrite, 10%~18% Water Dispersible Polyisocyanates, 0~3% propylene glycol, 0~2% dehydrogenation
Sodium acetate, 0~2% potassium sorbate and 15%~25% distilled water constitute.
In one embodiment, described its internal layer of water storage pool 4 is 0.5mm carbon steel sheet, and outer layer is 400mm polyurethane heat-insulation
Layer.
In one embodiment, the dipping freezing tank 6 be stainless steel cabinet, outside be coated with polyurethane insulation coating,
Insulation layer thickness is 150mm, and top is provided with insulation cover.
<the first cooling cycle system>
First cooling cycle system of the invention includes main refrigeration unit, main refrigeration unit heat exchanger and evaporative condenser
Device.The effect of first cooling cycle system is to freeze to cold liquid in water storage pool, make in cold liquid reach expected temperature
Degree.Direct sweat cooling system can be used in the first cooling cycle system in the present invention, for example, using freon as refrigerant
Refrigeration system, or also use liquefied ammonia as the refrigeration system of refrigerant.It include compressor and throttle valve, institute in main refrigeration unit
Compressor is stated using single machine two-stage screw bolt compressor.Single machine two-stage screw bolt compressor is generally required in low-temperature zone, that is, is lower than -25 DEG C
Use can be loaded, if be easy to causeing electric current is excessive unit is caused to burn when high temperature section refrigeration load is excessive.And this hair
Bright middle utilization water storage pool can guarantee that single machine compression with double stage machine runs on always low-temperature zone, that is, guarantee the second cooling cycle system
In refrigerating medium be not higher than -25 DEG C.Thus entire refrigeration system is reduced than high feature using single machine compression with double stage machine effect
Energy consumption, this is one of key technology of the present invention.And the initial stage run in refrigeration system of the invention, i.e., in water storage pool
When refrigerating medium is not below -25 DEG C, can take is in single machine compression with double stage machine lower than the general state fortune of its full-load power
Row, at this moment refrigeration effect is although poor but can guarantee that compressor is not in failure, or first will using other refrigeration units
The refrigerant temperature of water storage pool drags down, and restarts the operation of single machine two-stage screw bolt compressor when being lower than -25 DEG C.But once
Refrigerating medium in water storage pool is lower than -25 DEG C, and after single machine two-stage screw bolt compressor can be loaded, refrigeration system of the invention is just
It can be always with the operation of high energy efficiency ratio state.
The optional coil exchanger of main refrigeration unit heat exchanger used in first cooling cycle system, plate heat exchanger
Or combinations thereof.
<dipping refrigerating circulation system>
In dipping refrigerating circulation system of the invention include water storage pool, refrigerating water pump, circulating pump, dipping freezing tank and its
What is flowed in pipeline and pipeline interconnected is potassium formate-pentaerythrite-Water Dispersible Polyisocyanates-water system refrigerating
Agent.The concrete component of the refrigerating medium be mass ratio 30%~45% potassium formate, 15%~27% pentaerythrite, 10%~
18% Water Dispersible Polyisocyanates, 0~3% propylene glycol, 0~2% dehydroactic acid sodium, 0~2% potassium sorbate and 15%
~25% distilled water is constituted.Density of cold liquid is in 1.04~1.36g/cm in this3, specific heat is in 0.56~0.746cal/g
DEG C, viscosity is at 2.9~15.9mPas (cp), and for thermal conductivity in 0.21~0.47W/m.K, boiling point is greater than 150 DEG C, and freezing point is less than-
60 DEG C, no flash-point.The refrigeration system energy as caused by oil return difficulty is avoided due to using without mixed base grease in cold liquid in this
Consumption increases.
According to volume needed for dipping freezing tank, the volume for impregnating water storage pool in refrigerating circulation system can be in 20~60m3
Between be adjusted according to physical condition.Its internal layer of water storage pool is 0.5mm carbon steel sheet, and outer layer is 300mm polyurethane insulation coating.
Impregnate freezing tank use stainless steel cabinet, cabinet outer protection polyurethane insulation coating, insulation layer thickness 150mm,
Cabinet upper end setting insulation case lid is for preventing loss of refrigeration capacity.Impregnate the volume of freezing tank according to the daily quick-frozen amount of food and
The volume of freezing shelf for loading of pieces is calculated.For example, needing quick-frozen 40 tons of mutton daily, stainless steel frozen cargo is set up
It is set to 1000mm × 650mm × 1000mm, is arranged to 7 layers, each freezing shelf can carry 280Kg mutton.Then impregnate freezing tank
Size may be designed as 3900mm × 800mm × 1500mm for place three rows freeze shelf, total 36.It every 2 hours can be complete
At quick-frozen 10 tons of mutton, daily 8 hours achievable quick-frozen 40 tons.
Compared with prior art, key technology of the invention point includes following several respects:
1. use water storage pool as refrigerating medium cold-storage device in the present invention, so as to by the available machine time of refrigeration unit
It is adjusted to and uses the electricity price valley period, to reduce entire refrigeration system operation cost.
2. using single machine compression with double stage machine as main refrigeration unit in the present invention, can guarantee under the action of water storage pool
Single machine compression with double stage machine is run in low-temperature zone normal load always, using the high advantage of single machine compression with double stage machine Energy Efficiency Ratio, effectively
Reduction refrigeration unit power consumption.
The refrigerating medium of Water Dispersible Polyisocyanates is contained 3. being employed herein, which uses so that carrying
Cryogen can be cooled to -40 DEG C of low temperature hereinafter, to realize the cold-storage of greater strength.
4. directly using refrigerating medium to carry out dipping freezing to food in dipping freezing tank as refrigerant in the present invention, significantly
The chilling rate of food is improved, guarantees that food can be cooled to -5 DEG C hereinafter, to prevent cell liquid knot in prestissimo
It is brilliant.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by specification, right
Specifically noted structure is achieved and obtained in claim and attached drawing.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example and is used together to explain the present invention, be not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the system structure diagram of refrigeration system according to the present invention；
Fig. 2 be according to the present invention the refrigeration system quick-frozen time and transmitting the quick-frozen time contrast schematic diagram of freezer；
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made below in conjunction with attached drawing further
Ground is described in detail.
Fig. 1 is system structure diagram according to an embodiment of the invention.The present embodiment is said below with reference to Fig. 1
It is bright.
The dipping freezing indirect refrigeration system of the present embodiment includes the first cooling cycle system and dipping refrigerating circulation system,
First cooling cycle system includes main refrigeration unit 1, evaporative condenser 2 and main refrigeration unit heat exchanger 3, and the dipping is cold
Freezing the circulatory system includes water storage pool 4, refrigerating water pump 5, dipping freezing tank 6 and circulating pump 7.Main refrigeration unit described in the present embodiment
1 uses single machine two-stage screw bolt compressor, is the meat of 40 ton per days for quick-frozen amount, and by quick-frozen to -22 DEG C of meat of quick-frozen need
It asks down, needs to use single-machine capacity used in parallel for 2, single machine compression with double stage machine of 200KW.Institute in first cooling cycle system
The refrigerant used is R404A, and 2 operating condition heat exhausts of evaporative condenser are the downflow type evaporative condenser of 960KW, the main system
Cold group heat exchanger uses the coil exchanger of 16Mn steel pipe.The appearance of water storage pool 4 in the dipping refrigerating circulation system
Product is 30m3, which is 0.5mm carbon steel sheet, and outer layer is 300mm polyurethane insulation coating.Refrigerating water pump 5 and circulation
Pump 7 is all made of the centrifugal pump that the variable-frequency motor that power is 22KW drives.The dipping freezing tank 6 be sized to 1300mm ×
800mm × 1500mm is used in series using three dipping freezing tanks, which can complete 10 tons of meats in every 2 hours
Quick-frozen, the 40 tons of kinds of goods of completion in daily 8 hours are quick-frozen.
The main refrigeration unit heat exchanger of the first cooling cycle system, which is completely submerged in water storage pool, in the present embodiment stores
Refrigerating medium in, the group of refrigerating medium used in the present embodiment be divided into the potassium formate of mass ratio 38%, 21% pentaerythrite,
16.9% Water Dispersible Polyisocyanates, 1.55% propylene glycol, 1.45% dehydroactic acid sodium, 1.1% potassium sorbate and
20% distilled water is constituted.
The refrigerating operaton process of the present embodiment is as follows: in the electricity price valley period, starting main refrigeration unit 1, utilizes the first system
SAPMAC method system freezes to the refrigerating medium in water storage pool 4, and the refrigerant temperature in water storage pool 4 is down to -40 DEG C, with
After close main refrigeration unit 1.When progress meat is quick-frozen, refrigerating water pump 5 is opened, circulating pump 7 is closed, makes refrigerating medium in water storage pool
It is constantly recycled between 4 and dipping freezing tank 6.When refrigerant temperature rises to -25 DEG C, refrigerating water pump 5 and water storage pool are closed
Fluid valve is passed in and out, circulating pump 7 is opened, refrigerating medium is all between dipping freezing tank and recycles.The electricity price valley period is waited to arrive simultaneously
Freezed to refrigerating medium with starting main refrigeration unit 1, freezing is again turned on after so that refrigerant temperature is re-lowered to -40 DEG C
Pump 5 closes circulating pump 7, recycles refrigerating medium constantly between water storage pool 4 and dipping freezing tank 6.It can guarantee single machine in this way
Double-stage compressor be in always low-temperature zone can stress state operation, keep single machine compression with double stage machine transported in best Energy Efficiency Ratio state
Row.
Fig. 2 is the quick-frozen time graph and the transmitting quick-frozen temporal comparison of calandria freezer of the present embodiment, can be with from Fig. 2
Find out that dipping instant-frozen system of the invention can be within 2 hours by extremely -22 DEG C of fast food freezing, and traditional quick-frozen mode is same
Only fresh-keeping demand can also be not achieved by fast food freezing to -13 DEG C in 2 hours of sample.
The above, specific implementation case only of the invention, scope of protection of the present invention is not limited thereto, any ripe
Those skilled in the art are known in technical specification of the present invention, modifications of the present invention or replacement all should be in the present invention
Protection scope within.
Claims (6)
1. a kind of for impregnating the indirect refrigeration system of freezing, which is characterized in that the indirect refrigeration system includes the first refrigeration
The circulatory system and dipping refrigerating circulation system, first cooling cycle system includes main refrigeration unit 1,2 and of evaporative condenser
Main refrigeration unit heat exchanger 3, the dipping refrigerating circulation system include water storage pool 4, refrigerating water pump 5, dipping freezing tank 6 and circulation
Pump 7；The main refrigeration unit 1 uses single machine two-stage screw bolt compressor, and the main refrigeration unit heat exchanger 3 is totally submerged in cold-storage
In pond 4；The refrigerating medium containing Water Dispersible Polyisocyanates is used in the dipping refrigerating circulation system.
2. indirect refrigeration system according to claim 1, which is characterized in that main 1 refrigerant of refrigeration unit uses
R404A。
3. indirect refrigeration system according to claim 1, which is characterized in that the main refrigeration unit heat exchanger 3 uses
The coil exchanger of 16Mn steel pipe.
4. indirect refrigeration system according to claim 1, which is characterized in that the specific ingredient of the refrigerating medium is by quality
Than potassium formate, 15%~27% pentaerythrite, 10%~18% Water Dispersible Polyisocyanates, 0 for 30%~45%
~3% propylene glycol, 0~2% dehydroactic acid sodium, 0~2% potassium sorbate and 15%~25% distilled water constitute.
5. indirect refrigeration system according to claim 1, which is characterized in that described its internal layer of water storage pool 4 is 0.5mm carbon
Steel plate, outer layer are 400mm polyurethane insulation coating.
6. indirect refrigeration system according to claim 1, which is characterized in that the dipping freezing tank 6 is stainless steel cabinet,
Polyurethane insulation coating is coated with outside it, insulation layer thickness 150mm, top is provided with insulation cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910178448.5A CN109798684A (en) | 2019-03-11 | 2019-03-11 | It is a kind of for impregnate freezing indirect refrigeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910178448.5A CN109798684A (en) | 2019-03-11 | 2019-03-11 | It is a kind of for impregnate freezing indirect refrigeration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109798684A true CN109798684A (en) | 2019-05-24 |
Family
ID=66561819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910178448.5A Pending CN109798684A (en) | 2019-03-11 | 2019-03-11 | It is a kind of for impregnate freezing indirect refrigeration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109798684A (en) |
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2019
- 2019-03-11 CN CN201910178448.5A patent/CN109798684A/en active Pending
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