CN203605519U - Large refrigeration storage gas expansion refrigerating system - Google Patents
Large refrigeration storage gas expansion refrigerating system Download PDFInfo
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- CN203605519U CN203605519U CN201320729605.5U CN201320729605U CN203605519U CN 203605519 U CN203605519 U CN 203605519U CN 201320729605 U CN201320729605 U CN 201320729605U CN 203605519 U CN203605519 U CN 203605519U
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- heat exchanger
- refrigeration storage
- freon
- transfer valve
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Abstract
The utility model provides a large refrigeration storage gas expansion refrigerating system which solves the problem that in the prior art, Freon is consumed when a refrigeration storage carries out refrigeration. The refrigerating system comprises a gas inlet switching valve and further comprises a gas filter, the gas inlet switching valve is connected with a gas compressor and a gas heat exchanger in sequence, the gas heat exchanger is connected with a turbo expander which is connected with a cold gas inlet pipe, the cold gas inlet pipe is arranged in the refrigeration storage, a hot gas outlet pipe is arranged in the refrigeration storage, the hot gas outlet pipe is connected with the gas heat exchanger which is connected with the gas filter, the gas compressor and the gas inlet switching valve are connected with a PLC module, and a refrigeration storage temperature probe is connected to the PLC module. The large refrigeration storage gas expansion refrigerating system does not need any refrigerating fluid, the damage to the atmospheric ozonosphere from Freon is avoided, the temperature of the gas is reduced into the needed temperature through the turbo expander, the time of the heat exchanging link is shortened, and the heat loss of the heat exchanging link is reduced.
Description
Technical field
The utility model belongs to refrigerating field, is specifically related to a kind of large cold storage refrigeration system.
Background technology
Freon is the general name of several fluorine chloromethanes and fluorine chloric ethane.The air-conditionings, refrigerator, air conditioner etc. of commonly using in our life adopt freon to make cold-producing medium mostly.Due to freon stable chemical nature, and be organic matter, have do not fire, low toxicity, the characteristic such as dielectric constant is low, critical-temperature is high, easy liquefaction, thereby be widely used as the cold-producing medium of freezing equipment and conditioner.
But freon can consume ozone material in a large number, is the arch-criminal of depletion of the ozone layer.Freon is that 1920's is synthetic, and its stable chemical nature, does not have combustibility and toxicity, is taken as cold-producing medium, blowing agent and cleaning agent, is widely used in the fields such as household electrical appliance, foamed plastics, household chemicals, automobile, fire-fighting equipment.In the later stage eighties, the production of freon has reached peak, and output has reached 1,440,000 tons.Before freon is carried out being controlled, the whole world has reached 2,000 ten thousand tons to the freon discharging in atmosphere.Because their average life spans in atmosphere reach centuries, so the major part of discharge is still stayed in atmosphere, wherein major part still rests on troposphere, and sub-fraction rises up into stratosphere.At the freon of troposphere quite stable, enter after stratosphere in rising, under certain meteorological condition, can under the effect of intense UV rays, be decomposed, decompose the chlorine atom discharging with ozone meeting chain-react, constantly destroy ozone molecule.Scientist estimates that a chlorine atom can destroy tens thousand of ozone molecules.
According to data, within 2003, ozone cavity area has reached 2,500 ten thousand square kilometres.After a large amount of losses of ozone layer quilt, the ability of ultraviolet radiation-absorbing weakens greatly, causes the ultraviolet ray that arrives earth surface obviously to increase, and brings many-sided harm to human health and ecological environment.According to one's analysis, Stratospheric ozone depletion 0.01%, the global cataractous incidence of disease will increase 0.6-0.8%, mean and therefore cause that blind number will increase by 10,000 to 1.5 ten thousand people.
For this reason, China has put into effect a measure that is intended to Ozonosphere protection, will completely forbid and use freon after 2010.The schedule of formulating according to relevant department: by 2010, China will completely forbid material--the fluorine Lyons that produces and use ozone layer depletion.According to this schedule, China by since on July 1st, 1999 the production and consumption horizontal frozen in fluorine Lyons in the average level of 1995～1997 years, later year by year reduce.On January 1st, 2010, freon is banned use of by China.But because the cold-producing medium price of replacement fluorine Leon is high, and refrigeration can not show a candle to freon, so until on August 1st, 2013, China is still being used freon.And according to relevant personnel investigation, even in many decades, the use amount of China's freon will still can remain high over the next several years, the situation of Ozonosphere protection also will be still very severe.
Conventional freezer refrigerating machine, to utilize freon as cold-producing medium, by compression freon, then heat exchanger heat exchange, the temperature of reduction freon, makes freon liquefaction, then pass through throttle effect, further reduce the temperature of freon, then the air in the freon of low temperature and freezer is adopted to wall-type heat exchange, to reduce the temperature in freezer.
Utility model content
The utility model proposes a kind of large cold storage gas expansion refrigeration system, solved the problem that in prior art, freezer consumes freon in refrigeration.
The technical solution of the utility model is achieved in that
A kind of large cold storage gas expansion refrigeration system, comprise gas feed transfer valve, also comprise pneumatic filter, gas feed transfer valve successively with gas compressor, gas heat exchanger is connected, gas heat exchanger is connected with turbo-expander, turbo-expander is connected with cold air blast pipe, cold air blast pipe is arranged in freezer, in freezer, be also provided with hot gas discharge pipe, hot gas discharge pipe is connected with gas heat exchanger, gas heat exchanger is also connected with pneumatic filter, gas compressor, gas feed transfer valve is all connected with PLC control module, in PLC control module, be connected with temperature of ice house probe.
Between described gas compressor and gas heat exchanger, be also provided with the dry transfer valve of gas, an output of the dry transfer valve of gas is connected with gas-drying apparatus, and the output of gas-drying apparatus is connected with gas heat exchanger.
Described hot gas discharge pipe is arranged on cold air blast pipe top.
Gas heat exchanger is also connected with gas emitting valve, and gas emitting valve is connected with PLC control module.
The utility model does not need to utilize any cold-producing medium, has avoided the destruction of freon to atmospheric ozone layer.Can, directly by clean gas compression after treatment, expand by turbo-expander, gas temperature is reduced to required temperature, be then discharged in freezer and go, can reach the effect of fast-refrigerating, and reduce time and the thermal loss of heat exchange link.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is structural representation of the present utility model.
Wherein: 1. gas feed transfer valve, 2. pneumatic filter, 3. gas compressor, 4. the dry transfer valve of gas, 5. gas-drying apparatus, 6. gas heat exchanger, 7. turbo-expander, 8. freezer, 9. hot gas discharge pipe, 10. cold air blast pipe, 11. temperature of ice house probes, 12. gas emitting valves, 13.PLC control module.
The specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not paying the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, a kind of large cold storage gas expansion refrigeration system, comprise gas feed transfer valve 1, also comprise pneumatic filter 2, gas feed transfer valve 1 successively with gas compressor 3, gas heat exchanger 6 is connected, gas heat exchanger 6 is connected with turbo-expander 7, turbo-expander 7 is connected with cold air blast pipe 10, cold air blast pipe 10 is arranged in freezer 8, in freezer 8, be also provided with hot gas discharge pipe 9, hot gas discharge pipe 9 is connected with gas heat exchanger 6, gas heat exchanger 6 is also connected with pneumatic filter 2, gas compressor 3, gas feed transfer valve 1 is all connected with PLC control module 13, in PLC control module 13, be connected with temperature of ice house probe 11.Described hot gas discharge pipe 9 is arranged on cold air blast pipe 10 tops.
The utility model course of work is as follows: first gas filter through pneumatic filter 2, remove granule foreign and dust wherein, enter gas compressor 3 by gas feed transfer valve 1 afterwards, the gas that is compressed into certain pressure is tentatively lowered the temperature through gas heat exchanger 6 again, the gas of preliminary cooling is reduced to below-40 ℃ under the effect of turbo-expander 7, cooling gas enters freezer 8 uniformly by cold air blast pipe 10 afterwards, the thermal current rising in freezer enters after gas heat exchanger 6 reclaims cold by hot gas discharge pipe 9, again enter gas feed transfer valve 1 and enter circulation next time.Wherein, PLC control module 13 is accepted the temperature information of temperature of ice house probe 11, controls the work of gas feed transfer valve 1, gas compressor 3.
In big-and-middle-sized freezer, often deposit fresh fruit or vegetables, therefore, may there is requirement to the humidity of gas.Therefore, as of the present utility model preferred, between described gas compressor 3 and gas heat exchanger 6, be also provided with the dry transfer valve 4 of gas, an output of the dry transfer valve 4 of gas is connected with gas-drying apparatus 5, and the output of gas-drying apparatus 5 is connected with gas heat exchanger 6.After arranging like this, can according to gas compressor 3 out the aridity of gas select, if gas humidity is suitable, gas is through directly entering gas heat exchanger 6 after the dry transfer valve 4 of gas, if gas is crossed as dry or humidity is excessive, gas compressor 3 gas out first regulates humidity through gas-drying apparatus 5, enters afterwards gas heat exchanger again.
Some large cold storages will do long-period freshness preserving to some fresh melon fruit vegetables and store, and the air entering in gas feed transfer valve 1 can be replaced by nitrogen.Nitrogen itself also can be used as refrigerant gas on the one hand; Can reduce on the other hand oxygen content in freezer, reduce the oxidation of fresh melon fruit vegetable, greatly prolong storage period.In the time using nitrogen, freezer 8 is interior may there are some muddy air etc., in cold storage procedure, need to first these gases be discharged.Therefore, improve as a step more of the present utility model, gas heat exchanger 6 is also connected with gas emitting valve 12, and gas emitting valve 12 is connected with PLC control module 13.In initial launch, first gas emitting valve 12 is opened like this, foul smell in freezer 8 is discharged, close afterwards gas emitting valve 12, gas more out in gas heat exchanger 6 is directly connected with gas feed transfer valve 1.PLC control module 13 can be controlled the work of gas emitting valve 12 and gas feed transfer valve 1.
In addition, according to the difference of the size of freezer 8, storage inside object, the treating capacity of gas-drying apparatus 5 can regulate, and can regulate gas humidity timely like this.
The utlity model has following advantage:
1, the utility model adopts expansion of compressed gas Refrigeration Technique, directly gas self temperature is reduced to low-temperature condition, does not need the cold-producing mediums such as freon as refrigeration medium;
2, can replace air with pure nitrogen gas, as refrigerant gas, nitrogen also can play the effect of long term insurnace simultaneously;
3, supporting gas-drying apparatus 5 in system, can, according to the humidity indicating value in freezer, carry out suitable dry processing to gas, guarantee that the water content in freezer maintains suitable amount, avoid water content too much and frosting is serious, the very few chilled goods lack of water that causes of water content.
4, complete equipment configuration is simple, and cost of investment is low, and easy to operate.
5, directly freeze to reduce gas temperature by expansion of compressed gas, cooling rate is fast; Temperature-fall period does not need heat exchange, has reduced the loss of refrigeration capacity of heat transfer process, reduces energy consumption.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (4)
1. a large cold storage gas expansion refrigeration system, comprise gas feed transfer valve (1), it is characterized in that: also comprise pneumatic filter (2), gas feed transfer valve (1) successively with gas compressor (3), gas heat exchanger (6) is connected, gas heat exchanger (6) is connected with turbo-expander (7), turbo-expander (7) is connected with cold air blast pipe (10), cold air blast pipe (10) is arranged in freezer (8), in freezer (8), be also provided with hot gas discharge pipe (9), hot gas discharge pipe (9) is connected with gas heat exchanger (6), gas heat exchanger (6) is also connected with pneumatic filter (2), gas compressor (3), gas feed transfer valve (1) is all connected with PLC control module (13), in PLC control module (13), be connected with temperature of ice house probe (11).
2. large cold storage gas expansion refrigeration system according to claim 1, it is characterized in that: between described gas compressor (3) and gas heat exchanger (6), be also provided with the dry transfer valve (4) of gas, the output that gas is dried transfer valve (4) is connected with gas-drying apparatus (5), and the output of gas-drying apparatus (5) is connected with gas heat exchanger (6).
3. large cold storage gas expansion refrigeration system according to claim 1, is characterized in that: described hot gas discharge pipe (9) is arranged on cold air blast pipe (10) top.
4. according to the large cold storage gas expansion refrigeration system one of claim 1～3 Suo Shu, it is characterized in that: gas heat exchanger (6) is also connected with gas emitting valve (12), gas emitting valve (12) is connected with PLC control module (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320729605.5U CN203605519U (en) | 2013-11-15 | 2013-11-15 | Large refrigeration storage gas expansion refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320729605.5U CN203605519U (en) | 2013-11-15 | 2013-11-15 | Large refrigeration storage gas expansion refrigerating system |
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| Publication Number | Publication Date |
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| CN203605519U true CN203605519U (en) | 2014-05-21 |
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| CN201320729605.5U Expired - Fee Related CN203605519U (en) | 2013-11-15 | 2013-11-15 | Large refrigeration storage gas expansion refrigerating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604239A (en) * | 2013-11-15 | 2014-02-26 | 杭州锦华气体设备有限公司 | Large-cold-storage gas expansion refrigerating system and refrigerating method thereof |
-
2013
- 2013-11-15 CN CN201320729605.5U patent/CN203605519U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103604239A (en) * | 2013-11-15 | 2014-02-26 | 杭州锦华气体设备有限公司 | Large-cold-storage gas expansion refrigerating system and refrigerating method thereof |
| CN103604239B (en) * | 2013-11-15 | 2016-01-20 | 杭州锦华气体设备有限公司 | A kind of large cold storage gas expansion refrigeration system and refrigerating method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140521 Termination date: 20181115 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |