CN105571185A - Graded refrigeration equipment - Google Patents
Graded refrigeration equipment Download PDFInfo
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- CN105571185A CN105571185A CN201410621886.1A CN201410621886A CN105571185A CN 105571185 A CN105571185 A CN 105571185A CN 201410621886 A CN201410621886 A CN 201410621886A CN 105571185 A CN105571185 A CN 105571185A
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- compressor
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Abstract
The invention designs graded refrigeration equipment. The graded refrigeration equipment comprises multiple groups of evaporators, a compressor, a water-cooled/air-cooled condenser, an expansion valve and a connecting pipeline and is characterized in that a high-pressure end of the compressor is connected with the water-cooled/air-cooled condenser by the aid of the pipeline, the water-cooled/air-cooled condenser is connected with the expansion valve by the aid of the pipeline, the expansion valve is connected with the multiple evaporators by the aid of the pipeline in parallel, the multiple evaporators are connected with a low-pressure end of the compressor in parallel, and solenoid valves are in series connection with the pipeline which connects the expansion valve with the multiple evaporators. Booster pumps are in series connection with the pipeline which connects the multiple evaporators with the low-pressure end of the compressor in parallel. The graded refrigeration equipment has the advantages that the stable refrigerating capacity can be realized and can still be kept when the temperature of a freezer is decreased, besides, the evaporation temperature can be decreased, and the deep refrigeration requirement can be met.
Description
Technical field
The present invention relates to a kind of grading system cool equipment.
Background technology
In food production supply industry, the storage of food is an important link, because current food product refrigeration adopts freezer to stack, its cryogenic temperature is generally at 18 degrees below zero, this temperature is freezing most end requirement of depositing, general only 1 year of its refrigeration, has a lot of food for various reasons, can only in the shelf-life near being destruction.If temperature to be reduced to subzero 44 degree, then the refrigeration date of food is indefinite duration, this is because now, bacterium stops growing.The loss late of whole like this food service industry will reduce greatly.
In compressor refrigeration system used at present, its operation principle is that refrigerant flows through evaporimeter high pressure from expansion valve and becomes low pressure, and liquid state becomes gaseous state, sweat cooling, and then refrigerant enters compressor pressurizes again, and condenser dispels the heat.Form circularly cooling, during due to design, the problem of individual Conditions Matching is had between compressor and evaporimeter thereof, that is exactly when starting working, environment temperature and temperature of ice house are all higher, if then the Conditions Matching of compressor and evaporimeter is according to design during beginning, that is along with the decline of temperature of ice house, the reduction of thermic load, catching a cold of expansion valve, the refrigerant flowing to evaporimeter constantly reduces, pressure in evaporimeter constantly reduces, the evaporating temperature of evaporimeter constantly declines, then refrigerant inflow compressor also reduces, that total refrigerating capacity will decline, here the minimizing of a refrigerating capacity is produced.Make the refrigerating capacity of freezer less with the decline of temperature, cause the chilling rate of food to be guaranteed, and snap frozen is the key ensureing food refrigerated quality.
And the evaporating pressure of evaporimeter reduces in addition, then evaporating temperature declines, the storehouse temperature of freezer is declined, but the suction end of the evaporating pressure of evaporimeter and compressor is relevant, screw machine in current fluorine mechanism cold or semiclosed machine are when designing, strict requirement is had to the low voltage value of inlet valve (low pressure), during general setting negative pressure, machine upkeep end starts, shut down, this is due to the designing requirement of equipment own, negative pressure must not be there is, otherwise machine breakdown, so that in refrigeration, the evaporating pressure of evaporimeter can not infinitely decline, then cryogenic temperature also cannot decline further.Therefore the above-mentioned two kinds of problems of existing compression refrigeration equipment ubiquity, one is that refrigerating capacity cannot keep stable, one is that cryogenic temperature cannot reduce further, common compression mechanism cool equipment namely cannot be adopted to carry out deep refrigerating, and subzero 44 degree will be reached, then will adopt multi-stage refrigerating equipment, and there is above-mentioned two problems equally in multi-stage refrigerating equipment, to greatly improve the cost of refrigeration like this, the storage of food cannot bear so high cost.Therefore urgently existing compression refrigeration equipment is improved, improve the refrigerated shelf life of freezer, reduce the refrigeration cost of food.
Summary of the invention
The object of the invention is to solve compression refrigeration equipment in prior art to there is refrigerating capacity and decline with temperature of ice house and reduce, temperature cannot be lowered into the problems referred to above existing for deep-freezing further, provides a kind of grading system cool equipment.The present invention designs a kind of grading system cool equipment, comprise some groups of evaporimeters, compressor, water-cooled/air-cooled condenser, expansion valve, connecting line, it is characterized in that: the high-pressure side of compressor connects water-cooled/air-cooled condenser by pipeline, water-cooled/air-cooled condenser connects expansion valve by pipeline, expansion valve is connected by pipeline and connects several evaporimeters, several evaporimeters also connect the low-pressure end of compressor, and the pipeline connecting several evaporimeters at expansion valve is serially connected with magnetic valve.At several evaporimeters the pipeline connecing the low-pressure end of compressor is serially connected with booster pump.Expansion valve is serially connected with before each evaporimeter.Booster pump is the pump of worm gear supercharging pump or vacuum gooster pump or other supercharging or the device with pressurization that is attached in compressor.Advantage of the present invention to realize stable refrigerating capacity, after temperature of ice house reduces, still can keep stable refrigerating capacity, and can meet the reduction of evaporating temperature, ensures the requirement of deep refrigerating.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present invention (being connected with an expansion valve), and Fig. 2 is another structural representation of the present invention (being serially connected with an expansion valve before each evaporimeter).
Detailed description of the invention
A kind of grading system cool equipment in figure, comprise some groups of evaporimeters 1, compressor 2, water-cooled/air-cooled condenser 3, expansion valve 4, connecting line 5, it is characterized in that: the high-pressure side of compressor connects water-cooled/air-cooled condenser by pipeline, water-cooled/air-cooled condenser connects expansion valve by pipeline, expansion valve is connected by pipeline and connects several evaporimeters, several evaporimeters also connect the low-pressure end of compressor, and the pipeline connecting several evaporimeters at expansion valve is serially connected with magnetic valve 6.At several evaporimeters the pipeline connecing the low-pressure end of compressor is serially connected with booster pump 7.Expansion valve is serially connected with before each evaporimeter.The connection of certain expansion valve can have other form, and an expansion valve connects one group of evaporimeter, has several groups of evaporimeters, has several expansion valve.Booster pump is the pump of worm gear supercharging pump or vacuum gooster pump or other supercharging or the device with pressurization that is attached in compressor.
When freezer is started working, temperature of ice house or normal temperature, then open first evaporimeter, now, first magnetic valve is opened, and the disengagement area of first evaporimeter is just in time mated with compressor horsepower, and compressor sends specified refrigerating capacity.When temperature of ice house drops to as minus 20 degrees, expansion valve is caught a cold, the refrigerant flow through reduces, and now the evaporating pressure of evaporimeter also declines, as 0.2P, at this moment, can open second magnetic valve, second evaporimeter starts to add, now, compressor can ensure the amount flowing through refrigerant of two evaporimeters, ensures that whole freezer still can have a stable refrigerating capacity.When temperature declines further again, during to subzero 30 degree, the refrigerant flowing through aforesaid two evaporimeters reduces again, the evaporating pressure of evaporimeter drops to as 0.1P, now, open the 3rd magnetic valve, start the 3rd evaporimeter, increase the disengagement area of whole refrigeration plant, still keep certain refrigerating capacity, but the now decline of evaporator pressure, make the pressure unmatched of the suction end of evaporator pressure and compressor, then by starting the booster pump being serially connected in this, the pressure of the evaporating pressure of evaporimeter and the suction side of compressor is become indirect relation from direct identity relation, so just can ensure the little value to evaporating temperature can be met of the evaporating pressure of evaporimeter in evaporator end, the temperature of evaporimeter is reduced further, and by the supercharging of booster pump, the pressure of the suction side of compressor can be kept to meet the normal work of compressor.
The booster pump adopted is the pump of worm gear supercharging pump or vacuum gooster pump or other supercharging or the device with pressurization that is attached in compressor.
Claims (4)
1. a grading system cool equipment, comprise some groups of evaporimeters, compressor, water-cooled/air-cooled condenser, expansion valve, connecting line, it is characterized in that: the high-pressure side of compressor connects water-cooled/air-cooled condenser by pipeline, water-cooled/air-cooled condenser connects an expansion valve by pipeline, expansion valve is connected by pipeline and connects several evaporimeters, several evaporimeters also connect the low-pressure end of compressor, and the pipeline connecting several evaporimeters at expansion valve is serially connected with magnetic valve.
2. by a kind of grading system cool equipment according to claim 1, it is characterized in that: at several evaporimeters the pipeline connecing the low-pressure end of compressor is serially connected with booster pump.
3., by a kind of grading system cool equipment according to claim 1, it is characterized in that: before each evaporimeter, be serially connected with expansion valve.
4. by a kind of grading system cool equipment according to any one of claims 1 to 3, it is characterized in that: booster pump is the pump of worm gear supercharging pump or vacuum gooster pump or other supercharging or the device with pressurization that is attached in compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410621886.1A CN105571185A (en) | 2014-11-07 | 2014-11-07 | Graded refrigeration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410621886.1A CN105571185A (en) | 2014-11-07 | 2014-11-07 | Graded refrigeration equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105571185A true CN105571185A (en) | 2016-05-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410621886.1A Pending CN105571185A (en) | 2014-11-07 | 2014-11-07 | Graded refrigeration equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105571185A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865066A (en) * | 2016-06-29 | 2016-08-17 | 湖南亚华乳业有限公司 | Combined-type raw milk fast cooling system based on non-azeotropic mixtures |
| CN106705466A (en) * | 2016-12-08 | 2017-05-24 | 天津商业大学 | Low-temperature classified storage type traditional Chinese medicine cabinet |
-
2014
- 2014-11-07 CN CN201410621886.1A patent/CN105571185A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865066A (en) * | 2016-06-29 | 2016-08-17 | 湖南亚华乳业有限公司 | Combined-type raw milk fast cooling system based on non-azeotropic mixtures |
| CN106705466A (en) * | 2016-12-08 | 2017-05-24 | 天津商业大学 | Low-temperature classified storage type traditional Chinese medicine cabinet |
| CN106705466B (en) * | 2016-12-08 | 2020-04-24 | 天津商业大学 | Low-temperature classified storage type traditional Chinese medicine cabinet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160511 |
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| WD01 | Invention patent application deemed withdrawn after publication |