CN107816818A - A kind of folding type cooling system of freezer with hot gas defrosting - Google Patents
A kind of folding type cooling system of freezer with hot gas defrosting Download PDFInfo
- Publication number
- CN107816818A CN107816818A CN201711220245.5A CN201711220245A CN107816818A CN 107816818 A CN107816818 A CN 107816818A CN 201711220245 A CN201711220245 A CN 201711220245A CN 107816818 A CN107816818 A CN 107816818A
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- defrosting
- temperature level
- low
- gas
- evaporator
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- 238000010257 thawing Methods 0.000 title claims abstract description 69
- 238000001816 cooling Methods 0.000 title claims abstract description 15
- 238000005057 refrigeration Methods 0.000 claims abstract description 31
- 239000003507 refrigerant Substances 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 238000000034 method Methods 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- 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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
Abstract
The present invention discloses a kind of folding type cooling system of freezer with hot gas defrosting, including high-temperature level loop and low-temperature level loop；Low-temperature level loop includes low-temperature level compressor, low-temperature level oil eliminator, two evaporators in parallel, the gas vent of low-temperature level oil eliminator forms refrigeration branch and defrosting branch road, the condensed evaporator of high-temperature high-pressure refrigerant gas of refrigeration branch, low-temperature level reservoir, choke valve, selection evaporator, a gas-liquid separator after return to low-temperature level compressor, freezed；The high-temperature high-pressure refrigerant gas of defrosting branch road enters another evaporator defrosting after pressure-regulating valve pressure regulation, and the refrigerant liquid after defrosting returns to gas-liquid separator.The present invention uses two parallel evaporators, solves the problems, such as during defrosting storehouse temperature fluctuation may be caused excessive.
Description
Technical field
The present invention relates to refrigeration system technical field, and in particular to a kind of cascade refrigeration system of freezer with hot gas defrosting
System.
Background technology
Hot gas defrosting mode is used in low-temperature cold store, the defrosting time is short, with Ku Nei and the heat exchange amount of surrounding building enclosure
It is few, it is not necessary to expend the electric energy of cooling water circulation water pump or condenser fan.Its defrosting efficiency is higher, is a kind of removing for energy-conservation
White mode.For existing refrigeration system during hot gas defrosting, whole system is in stopped status, can fluctuate storehouse temperature
It is bigger, it is unfavorable for food storage；Compressor air-discharging is led directly in evaporator simultaneously, easily right because pressure differential is bigger
Evaporator coil has larger percussion, and control is improper, and Decrepitation Phenomena easily occurs；Refrigerant liquid caused by last defrosting
Pressure-regulating valve must be utilized to reduce the pressure of liquid reservoir in system so that liquid can be back in system, can cause to press
The power consumption increase of contracting machine.
The content of the invention
The purpose of the present invention is for technological deficiency present in prior art, there is provided one kind can continuous cooling with it is continuous
The freezer folding type cooling system of defrosting, to solve the problems, such as that evaporator defrosting is with keeping storehouse temperature stable in freezer.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of folding type cooling system of freezer with hot gas defrosting, including high-temperature level loop and low-temperature level loop；High temperature
Level loop include being set in sequence in successively high-temperature level oil eliminator on gas outlet to the loop of gas returning port of high-temperature level compressor,
Condenser, high-temperature level reservoir, choke valve, condenser/evaporator；The low-temperature level loop includes low-temperature level compressor and low-temperature level
Low-temperature level oil eliminator, two evaporators in parallel of compressor connection, the gas vent of the low-temperature level oil eliminator are formed
Refrigeration branch and defrosting branch road, the condensed evaporator of high-temperature high-pressure refrigerant gas of refrigeration branch, low-temperature level reservoir, throttling
Low-temperature level compressor is returned to after valve, evaporator, a gas-liquid separator selecting, is freezed；The HTHP of defrosting branch road
Refrigerant gas can enter another evaporator defrosting after pressure-regulating valve pressure regulation, and the refrigerant liquid after defrosting returns to the gas
The low-temperature level compressor is returned to after liquid/gas separator separation.
Two evaporators in parallel connect a defrosting magnetic valve respectively, after two defrosting magnetic valve parallel connections with defrosting
Branch road connects；Two evaporators in parallel connect a refrigeration magnetic valve respectively, after two refrigeration magnetic valve parallel connections with system
Cold branch road connection.
Defrosting branch road between the pressure-regulating valve and two defrosting magnetic valves is provided with pressure sensor, to survey in real time
Measure the refrigerant gas pressure on defrosting branch road.
Compared with prior art, the beneficial effects of the invention are as follows：
1. the present invention can realize an evaporator refrigeration, another evaporator defrosts, and can by magnetic valve opening and closing
The exchange at any time of both effects is realized, has the function that continuous cooling maintains storehouse temperature stable；
2. the present invention using the high-temperature high-pressure refrigerant gas of pressure-regulating valve regulation low-temperature level compressor discharge, prevent because
The excessive evaporator to carrying out defrosting of pressure causes to damage.
3. the present invention directly passes back into refrigerant liquid caused by defrosting in gas-liquid separator, on the one hand no longer need to lead to
Crossing the artificial reservoir pressure that reduces makes refrigerant flow back, and causes to press the increase of low-temperature level contracting machine power consumption；During another aspect defrosting
Unnecessary refrigerant gas can circularly cooling again by gas-liquid separator.
Brief description of the drawings
Fig. 1 show folding type cooling system structural representation of the freezer of the present invention with hot gas defrosting.
Embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
As shown in figure 1, a kind of folding type cooling system of freezer with hot gas defrosting, including：
High-temperature level loop and low-temperature level loop；High-temperature level loop includes being set in sequence in going out for high-temperature level compressor 1 successively
High-temperature level oil eliminator 2, condenser 3, high-temperature level reservoir 4, choke valve 5, condensation evaporation on gas port to the loop of gas returning port
Device 6；The low-temperature level oil eliminator 8, two that the low-temperature level loop includes low-temperature level compressor 7, is connected with low-temperature level compressor
First evaporator 16 and the second evaporator 17 in parallel, the gas vent of the low-temperature level oil eliminator form refrigeration branch and melted
White branch road, the condensed evaporator 6 of high-temperature high-pressure refrigerant gas, low-temperature level reservoir 9, the choke valve 10, first of refrigeration branch
Low-temperature level compressor 7 is returned to after a selected evaporator, gas-liquid separator 18 in the evaporator 17 of evaporator 16 and second, is carried out
Refrigeration；The high-temperature high-pressure refrigerant gas of defrosting branch road can enter the first evaporator 16 and second after the pressure regulation of pressure-regulating valve 11
Another evaporator defrosting in evaporator 17, the refrigerant liquid after defrosting return to institute after returning to the gas-liquid separator separates
State low-temperature level compressor.
Wherein, the high-temperature level loop is passed through successively from the high temperature and high pressure gas that high temperature stage compressor outlet is discharged by pipeline
Cross high-temperature level oil eliminator, high-temperature level condenser, reservoir, choke valve, return to high-temperature level compressor after condenser/evaporator and return
Gas port.
Specifically, two evaporators in parallel connect a defrosting magnetic valve respectively, it is first as shown in figure institute 1
The defrosting magnetic valve 15 of defrosting magnetic valve 13 and second, it is connected after two defrosting magnetic valve parallel connections with defrosting branch road；Described in two simultaneously
The evaporator of connection connects a refrigeration magnetic valve respectively, as shown in figure institute 1, for the first refrigeration refrigeration electromagnetism of magnetic valve 12 and second
Valve 14, it is connected after two refrigeration magnetic valve parallel connections with refrigeration branch.
When opening the first refrigeration defrosting magnetic valve 15 of magnetic valve 12 and second, the first defrosting magnetic valve 13 and the second system are closed
During cold magnetic valve 14, the first evaporator 16 is in refrigerating state, and the second evaporator 17 is in defrosting state.
Detailed process is that the high temperature and high pressure gas of low temperature stage compressor outlet discharge are divided into two branch by oil eliminator
Road, condenser/evaporator of the part of refrigerant gas through refrigeration branch, low-temperature level reservoir, choke valve, the first evaporator 16, gas
Liquid/gas separator 18 eventually passes back to low-temperature level compressor and completes whole process of refrigerastion；Another part refrigerant gas from bypass pipe (i.e.
Defrosting branch road) pressure that can be born to the second evaporator 17 through pressure-regulating valve regulation of outflow flows into the second evaporator 17 and carries out
Defrosting process, the refrigerant liquid after last defrosting are flowed back together with unnecessary refrigerant gas in gas-liquid separator, now
Second defrosting magnetic valve 15 is closed, and completes defrosting process.
First evaporator 16 is roughly the same with the defrosting process of the second evaporator 17, it is only necessary to by the first defrosting magnetic valve 13
Opened with the second refrigeration magnetic valve 14, close the first refrigeration magnetic valve 12 and second defrosting magnetic valve 15 and the first evaporation can be achieved
The exchange roles of the evaporator 17 of device 16 and second, another evaporator defrosting during realizing an evaporator refrigeration, without
Refrigeration is influenceed during defrosting, influences defrosting in refrigeration.
Wherein, the refrigerant gas pressure flowed into during defrosting in an evaporator in two evaporators is by pressure
Sensor measures.
In addition, the folding type cooling system of the present invention, which may also be multiple evaporators in parallel, reaches continuous cooling and continuous defrosting
Effect.
Described 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 it should be regarded as protection scope of the present invention.
Claims (3)
1. a kind of folding type cooling system of freezer with hot gas defrosting, including high-temperature level loop and low-temperature level loop；High-temperature level
Loop includes being set in sequence in high-temperature level oil eliminator on gas outlet to the loop of gas returning port of high-temperature level compressor, cold successively
Condenser, high-temperature level reservoir, choke valve, condenser/evaporator；Characterized in that, the low-temperature level loop is compressed including low-temperature level
Machine, the low-temperature level oil eliminator being connected with low-temperature level compressor, two evaporators in parallel；The gas of the low-temperature level oil eliminator
Body exports to form refrigeration branch and defrosting branch road, the condensed evaporator of high-temperature high-pressure refrigerant gas of refrigeration branch, low-temperature level
Reservoir, choke valve, selection evaporator, a gas-liquid separator after return to low-temperature level compressor, freezed；Defrosting branch road
High-temperature high-pressure refrigerant gas can enter another evaporator defrosting, the refrigerant liquid after defrosting after pressure-regulating valve pressure regulation
Body returns to the low-temperature level compressor after returning to the gas-liquid separator separates.
2. folding type cooling system of the freezer with hot gas defrosting according to claim 1, it is characterised in that described in two simultaneously
The evaporator of connection connects a defrosting magnetic valve respectively, is connected after two defrosting magnetic valve parallel connections with defrosting branch road；Described in two
Evaporator in parallel connects a refrigeration magnetic valve respectively, is connected after two refrigeration magnetic valve parallel connections with refrigeration branch.
3. folding type cooling system of the freezer with hot gas defrosting according to claim 2, it is characterised in that the pressure is adjusted
Defrosting branch road between section valve and two defrosting magnetic valves is provided with pressure sensor, to measure the refrigeration on defrosting branch road in real time
Agent gas pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711220245.5A CN107816818A (en) | 2017-11-29 | 2017-11-29 | A kind of folding type cooling system of freezer with hot gas defrosting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711220245.5A CN107816818A (en) | 2017-11-29 | 2017-11-29 | A kind of folding type cooling system of freezer with hot gas defrosting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107816818A true CN107816818A (en) | 2018-03-20 |
Family
ID=61604957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711220245.5A Pending CN107816818A (en) | 2017-11-29 | 2017-11-29 | A kind of folding type cooling system of freezer with hot gas defrosting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107816818A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112033080A (en) * | 2020-08-31 | 2020-12-04 | 山东冰河制冷技术有限公司 | Refrigeration house refrigeration system and refrigeration control method |
| EP3786547A1 (en) * | 2019-08-30 | 2021-03-03 | SAB Engineers GmbH | Cold storage system and associated method |
| CN114659377A (en) * | 2022-05-26 | 2022-06-24 | 苏州奥德高端装备股份有限公司 | Gas condensation recovery system and control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101307973A (en) * | 2008-07-09 | 2008-11-19 | 韩勋服 | Refrigerating device multi- circulating defrosting method and device |
| CN201964693U (en) * | 2011-01-07 | 2011-09-07 | 吴家伟 | Evaporator capable of simultaneously realizing refrigeration and hot working medium defrosting |
| CN103940156A (en) * | 2014-05-04 | 2014-07-23 | 江苏苏净集团有限公司 | Cascade heat pump drying system and control method thereof |
| CN207600009U (en) * | 2017-11-29 | 2018-07-10 | 天津商业大学 | A kind of folding type cooling system of freezer with hot gas defrosting |
-
2017
- 2017-11-29 CN CN201711220245.5A patent/CN107816818A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101307973A (en) * | 2008-07-09 | 2008-11-19 | 韩勋服 | Refrigerating device multi- circulating defrosting method and device |
| CN201964693U (en) * | 2011-01-07 | 2011-09-07 | 吴家伟 | Evaporator capable of simultaneously realizing refrigeration and hot working medium defrosting |
| CN103940156A (en) * | 2014-05-04 | 2014-07-23 | 江苏苏净集团有限公司 | Cascade heat pump drying system and control method thereof |
| CN207600009U (en) * | 2017-11-29 | 2018-07-10 | 天津商业大学 | A kind of folding type cooling system of freezer with hot gas defrosting |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3786547A1 (en) * | 2019-08-30 | 2021-03-03 | SAB Engineers GmbH | Cold storage system and associated method |
| CN112033080A (en) * | 2020-08-31 | 2020-12-04 | 山东冰河制冷技术有限公司 | Refrigeration house refrigeration system and refrigeration control method |
| CN114659377A (en) * | 2022-05-26 | 2022-06-24 | 苏州奥德高端装备股份有限公司 | Gas condensation recovery system and control method |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20180320 |