CN203274344U - Energy-saving cascade refrigerating system - Google Patents

Energy-saving cascade refrigerating system Download PDF

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Publication number
CN203274344U
CN203274344U CN 201320141923 CN201320141923U CN203274344U CN 203274344 U CN203274344 U CN 203274344U CN 201320141923 CN201320141923 CN 201320141923 CN 201320141923 U CN201320141923 U CN 201320141923U CN 203274344 U CN203274344 U CN 203274344U
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CN
China
Prior art keywords
low temperature
temperature level
valve
refrigeration
low
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CN 201320141923
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Chinese (zh)
Inventor
邱彪
严善仓
马学焕
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安徽亿瑞深冷能源科技有限公司
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Priority to CN 201320141923 priority Critical patent/CN203274344U/en
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Publication of CN203274344U publication Critical patent/CN203274344U/en

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Abstract

The utility model discloses an energy-saving cascade refrigerating system which comprises a high-temperature refrigerating cycle and a low-temperature refrigerating cycle, wherein the high-temperature refrigerating cycle and the low-temperature refrigerating cycle are connected to two sides of a condensation evaporator; a high-pressure refrigerating agent going out of a liquid storage tank in the low-temperature refrigerating cycle is divided into a refrigeration main channel and a refrigeration branch; the refrigeration main channel comprises a first low-temperature electromagnetic valve and a first low-temperature expansion valve which are connected sequentially as well as a first evaporator in a device working chamber; the refrigeration branch comprises a second electromagnetic valve and a second low-temperature first expansion valve which are connected sequentially as well as a second evaporator in a standby storage tank; and the standby storage tank passes through a third electromagnetic valve and a vacuum pump sequentially and is communicated with the device working chamber. Besides, a hot gas bypass and a vacuum pumping branch are also arranged in the low-temperature refrigerating cycle. The energy-saving cascade refrigerating system has remarkable benefits as follows: a refrigeration effect can be realized easily, the cooling speed is high, the utilization rate of the refrigerating system is high, and energy is saved.

Description

A kind of energy-conservation cascade refrigeration system
Technical field
The utility model relates to the environmental-test facility field, is specially a kind of energy-conservation cascade refrigeration system.
Background technology
Environmental-test facility all has a wide range of applications in scientific domains such as Aeronautics and Astronautics, electronics, medical science, metallurgy.Along with the development of science and technology, more and more high to the requirement of product reliability, therefore, the requirement of environment simulation experiment equipment and application mode are also more extensively.The multiplex cooling in environmental-test facility of cascade refrigeration system, dehumidifying.Common cascade refrigeration system is divided into the two-stage loop, and the high temperature level is carried out precooling to the low temperature level, and low temperature level cold-producing medium evaporates in evaporimeter realizes refrigeration.But this cascade refrigeration system exists rate of temperature fall slow when being used for big-and-middle-sized environment simulation experiment equipment, the problem that refrigeration is limited, and shortcoming is more obvious when needing the big-and-middle-sized environmental-test facility of rapid temperature rise and drop.Conventional solution is to improve the refrigeration that refrigerating capacity reaches expectation when refrigeration unit designs.But, can improve the equipment investment expense thus, and carry out steady temperature when test, needing to improve heating power could the unnecessary refrigerating capacity of balance, therefore, has caused again energy waste.
The utility model content
For the problem that prior art exists, the purpose of this utility model is to provide the energy-conservation cascade refrigeration system that a kind of big-and-middle-sized environmental-test facility is used, and easily realizes to reach refrigeration, and rate of temperature fall is fast, and utilization rate of equipment and installations is high, the purpose that energy resource consumption is low.
In order to achieve the above object, the technical scheme that adopts of the utility model is:
a kind of energy-conservation cascade refrigeration system, include the high temperature level kind of refrigeration cycle that also flows through for high temperature refrigerant with condenser/evaporator, it is characterized in that: also include the low temperature level kind of refrigeration cycle that flows through for low-temperature refrigerant, described low temperature level kind of refrigeration cycle is by consist of successively the low temperature stage compressor in loop by pipeline connection, low temperature level water condenser, low temperature level oil eliminator, condenser/evaporator, low temperature level fluid reservoir, low temperature level the first magnetic valve, low temperature level the first expansion valve, be arranged on the first evaporimeter in the equipment operating room, the first-hand valve of low temperature level, low temperature level second-hand valve, low temperature level suction filter, expansion vessel consists of.
Described a kind of energy-conservation cascade refrigeration system, it is characterized in that: picked out bypass conduit on pipeline between described low temperature level fluid reservoir and low temperature level the first magnetic valve, be connected to successively the second magnetic valve, low temperature level the second expansion valve on bypass conduit, be arranged on the second evaporimeter in stand-by storage, after check (non-return) valve in the bypass access first-hand valve of low temperature level and equipment operating room between the first evaporimeter on pipeline, consist of the refrigeration branch road by the second evaporimeter, check (non-return) valve in the second magnetic valve, low temperature level the second expansion valve, stand-by storage.
Described a kind of energy-conservation cascade refrigeration system is characterized in that: described stand-by storage is communicated with the equipment operating room by the 3rd magnetic valve, vavuum pump successively.
Described a kind of energy-conservation cascade refrigeration system, it is characterized in that: picked out bypass conduit on pipeline between described low temperature level oil eliminator and condenser/evaporator, be connected to successively on bypass conduit after low temperature level the 3rd hand valve, low temperature level the 3rd magnetic valve, hot gas bypass valve between bypass access low temperature level suction filter and expansion vessel on pipeline, consist of the hot-gas bypass road by low temperature level the 3rd hand valve, low temperature level the 3rd magnetic valve, hot gas bypass valve.
Described a kind of energy-conservation cascade refrigeration system is characterized in that: be connected to bypass conduit on pipeline between the first-hand valve of described low temperature level and low temperature level second-hand valve, be connected to successively low temperature level the 4th hand valve, KF through flange on bypass conduit.
Advantage of the present utility model is: set up low temperature level refrigeration branch road, the slack tank Air is carried out cooling, the cooling-air in slack tank pumps into the equipment operating room by vavuum pump, effectively the refrigerating capacity of conditioning equipment operating room, make the operating room easily reach expection refrigeration, fast cooling; In addition, can also reduce cascade refrigeration system refrigeration design flow and the holding temperature heat loss when constant, improve the utilization rate of refrigeration system, save the energy.
Description of drawings
Fig. 1 is the energy-conservation cascade refrigeration system structural principle of the utility model schematic diagram.
The specific embodiment
As shown in Figure 1.The utility model comprises high temperature level kind of refrigeration cycle 01 and low temperature level kind of refrigeration cycle 02.High temperature level kind of refrigeration cycle 01 is made of the high temperature stage compressor 1, high temperature level oil eliminator 2, high temperature level water condenser 3, high temperature level fluid reservoir 4, high temperature level device for drying and filtering 5, high temperature level magnetic valve 6, high temperature level expansion valve 7 and the condenser/evaporator 8 that consist of the loop by pipeline connection successively, flow through successively high temperature stage compressor 1, high temperature level oil eliminator 2, high temperature level water condenser 3, high temperature level fluid reservoir 4, high temperature level device for drying and filtering 5, high temperature level magnetic valve 6, high temperature level expansion valve 7 and condenser/evaporator 8 of high temperature refrigerant in high temperature level kind of refrigeration cycle 01.Has the refrigeration main road in low temperature level kind of refrigeration cycle 02, low-temperature refrigerant low temperature stage compressor 9, low temperature level water condenser 10, low temperature level oil eliminator 11, condenser/evaporator 8, low temperature level fluid reservoir 12, low temperature level the first magnetic valve 13 and low temperature level the first expansion valve 14 in the refrigeration main road of flowing through successively in temperature level kind of refrigeration cycle 02, flow at last that in equipment operating room 15, the first evaporimeter 16 evaporations provide cold, then enter low temperature stage compressor 9 through the first-hand valve 24 of low temperature level, low temperature level second-hand valve 25, low temperature level suction filter 26, expansion vessel 27.In addition, also arrange in low temperature level kind of refrigeration cycle 02 refrigeration branch road, hot-gas bypass road, vacuumize branch road.
In the utility model, the refrigeration branch road comprises low temperature level the second magnetic valve 17, low temperature level the second expansion valve 18, interior the second evaporimeter 20 of stand-by storage 19, the check (non-return) valve 21 that connects successively, wherein between low temperature level the second magnetic valve 17 bypasses accesses low temperature level fluid reservoirs and low temperature level the first magnetic valve on pipeline, between the first evaporimeter in the check (non-return) valve bypass access first-hand valve 24 of low temperature level and equipment operating room 15 on pipeline; Further, stand-by storage 19 is communicated with equipment operating room 15 by low temperature level the 3rd magnetic valve 22, vavuum pump 23.
In the utility model, the hot-gas bypass road comprises low temperature level the 3rd hand valve 28, low temperature level the 3rd magnetic valve 29, the hot gas bypass valve 30 that connects successively; These low temperature level the 3rd hand valve 28 1 ends are connected between condenser/evaporator 8 and low temperature level oil eliminator 11, and these hot gas bypass valve 30 1 ends are connected between expansion vessel 27 and low temperature level suction filter 26.
In the utility model, vacuumize branch road and comprise low temperature level the 4th hand valve 31, the KF through flange 32 that connects successively; These low temperature level the 4th hand valve 31 1 ends are connected between the first-hand valve 24 of low temperature level and low temperature level second-hand valve 25.
This refrigeration system course of work of the utility model is as follows: 1, high temperature level kind of refrigeration cycle 01 provides cold by compression, condensation, throttling, evaporation process for condenser/evaporator 8.2, low temperature level high-pressure refrigerant is completed precooling by condenser/evaporator 8, and liquid refrigerant enters low temperature level fluid reservoir 12.First start the refrigeration branch road, low temperature level the first magnetic valve 13 cuts out,, enter the second evaporimeter 20 after the throttling cooling and complete air in slack tank cooling through low temperature level the second magnetic valve 17 and low temperature level the second expansion valve 18 from low temperature level fluid reservoir 12 high pressure liquid refrigerant out.3, cooling complete after, close low temperature level the second magnetic valve 17, open low temperature level the first magnetic valve 13, high-pressure refrigerant is realized the cooling of equipment operating room successively by low temperature level the first magnetic valve 13, low temperature level the first expansion valve 14 and the first evaporimeter 16.4, excessive when equipment operating room thermic load or when needing fast cooling, open low temperature level the 3rd magnetic valve 22, vavuum pump 23, in slack tank cooling-air pump into the operating room, realize the cold regulation of operating room.
In the utility model, it is convenient that the refrigeration branch road starts, and decided by operating room's experiment condition.Also can move simultaneously with the refrigeration main road when equipment operating room temperature constant, when low temperature level refrigeration main road can reach operating room's refrigeration effect, also can not enable the refrigeration branch road.
In the utility model; when the refrigeration branch road starts separately; because 19 air institute chilling requirements in cooling slack tank are less; refrigerating capacity more than needed may cause the second evaporimeter 20 to freeze and the 9 too low protections of pressure of inspiration(Pi) of low temperature stage compressor, and at this moment, low temperature level the 3rd magnetic valve 29, hot gas bypass valve 30 are opened; start the hot-gas bypass branch road; bypass high-pressure side cold-producing medium is realized the reasonable adjusting of cold more than needed to the low-pressure side of system, improves refrigeration system reliability of operation and efficient.
During to the vacuum pumping of low temperature level kind of refrigeration cycle: 1, close the first-hand valve 24 of low temperature level, low temperature level the first magnetic valve 13, low temperature level the second magnetic valve 17, open low temperature level second-hand valve 25, low temperature level the 3rd hand valve 28, low temperature level the 4th hand valve 31, low temperature level the 3rd magnetic valve 29, can complete removing refrigeration main road and refrigeration branch road in cryogenic refrigeration circulation 02 with the vacuum pumping of external system by KF through flange 32 interfaces; 2, close low temperature level second-hand valve 25, low temperature level the first magnetic valve 13, low temperature level the second magnetic valve 17, open the first-hand valve 24 of low temperature level, low temperature level the 4th hand valve 31, can complete vacuum pumping to refrigeration main road in cryogenic refrigeration circulation 02 and refrigeration branch road by KF through flange 32 interfaces.

Claims (5)

1. energy-conservation cascade refrigeration system, include the high temperature level kind of refrigeration cycle that also flows through for high temperature refrigerant with condenser/evaporator, it is characterized in that: also include the low temperature level kind of refrigeration cycle that flows through for low-temperature refrigerant, described low temperature level kind of refrigeration cycle is by consist of successively the low temperature stage compressor in loop by pipeline connection, low temperature level water condenser, low temperature level oil eliminator, condenser/evaporator, low temperature level fluid reservoir, low temperature level the first magnetic valve, low temperature level the first expansion valve, be arranged on the first evaporimeter in the equipment operating room, the first-hand valve of low temperature level, low temperature level second-hand valve, low temperature level suction filter, expansion vessel consists of.
2. a kind of energy-conservation cascade refrigeration system according to claim 1, it is characterized in that: picked out bypass conduit on pipeline between described low temperature level fluid reservoir and low temperature level the first magnetic valve, be connected to successively the second magnetic valve, low temperature level the second expansion valve on bypass conduit, be arranged on the second evaporimeter in stand-by storage, after check (non-return) valve in the bypass access first-hand valve of low temperature level and equipment operating room between the first evaporimeter on pipeline, consist of the refrigeration branch road by the second evaporimeter, check (non-return) valve in the second magnetic valve, low temperature level the second expansion valve, stand-by storage.
3. a kind of energy-conservation cascade refrigeration system according to claim 2 is characterized in that: described stand-by storage is communicated with the equipment operating room by the 3rd magnetic valve, vavuum pump successively.
4. a kind of energy-conservation cascade refrigeration system according to claim 1, it is characterized in that: picked out bypass conduit on pipeline between described low temperature level oil eliminator and condenser/evaporator, be connected to successively on bypass conduit after low temperature level the 3rd hand valve, low temperature level the 3rd magnetic valve, hot gas bypass valve between bypass access low temperature level suction filter and expansion vessel on pipeline, consist of the hot-gas bypass road by low temperature level the 3rd hand valve, low temperature level the 3rd magnetic valve, hot gas bypass valve.
5. a kind of energy-conservation cascade refrigeration system according to claim 1, is characterized in that: be connected to bypass conduit on pipeline between the first-hand valve of described low temperature level and low temperature level second-hand valve, be connected to successively low temperature level the 4th hand valve, KF through flange on bypass conduit.
CN 201320141923 2013-03-26 2013-03-26 Energy-saving cascade refrigerating system CN203274344U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103673368A (en) * 2013-12-27 2014-03-26 天津商业大学 Superposed refrigerating system capable of adjusting air-intake temperature of compressor
CN104236164A (en) * 2014-09-15 2014-12-24 美意(浙江)空调设备有限公司 Ultra-high temperature cascade water source heat pump system
CN104729135A (en) * 2015-04-13 2015-06-24 福建雪人股份有限公司 CO2/NH3 cascade refrigerating system
CN105091390A (en) * 2015-09-11 2015-11-25 南通百源制冷设备有限公司 Direct freezing device for liquid carbon dioxide
CN105665053A (en) * 2016-03-30 2016-06-15 天津亭华科技有限公司 Low constant temperature device for cascade type high-low temperature test chamber
CN110494702A (en) * 2017-04-17 2019-11-22 三菱电机株式会社 Refrigerating circulatory device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103673368A (en) * 2013-12-27 2014-03-26 天津商业大学 Superposed refrigerating system capable of adjusting air-intake temperature of compressor
CN104236164A (en) * 2014-09-15 2014-12-24 美意(浙江)空调设备有限公司 Ultra-high temperature cascade water source heat pump system
CN104729135A (en) * 2015-04-13 2015-06-24 福建雪人股份有限公司 CO2/NH3 cascade refrigerating system
CN105091390A (en) * 2015-09-11 2015-11-25 南通百源制冷设备有限公司 Direct freezing device for liquid carbon dioxide
CN105665053A (en) * 2016-03-30 2016-06-15 天津亭华科技有限公司 Low constant temperature device for cascade type high-low temperature test chamber
CN110494702A (en) * 2017-04-17 2019-11-22 三菱电机株式会社 Refrigerating circulatory device

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