CN202420018U - Energy-saving mixed cascade refrigeration system - Google Patents
Energy-saving mixed cascade refrigeration system Download PDFInfo
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- CN202420018U CN202420018U CN2012200161809U CN201220016180U CN202420018U CN 202420018 U CN202420018 U CN 202420018U CN 2012200161809 U CN2012200161809 U CN 2012200161809U CN 201220016180 U CN201220016180 U CN 201220016180U CN 202420018 U CN202420018 U CN 202420018U
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Abstract
The utility model discloses an energy-saving mixed cascade refrigeration system, which includes a condensation evaporator, as well as a high temperature level refrigeration system and a low temperature level refrigeration system that form independent cycle circuits with the condensation evaporator respectively; the high temperature level refrigeration system is additionally and internally provided with an independent refrigeration cycle circuit, a set of high temperature level cold bypasses and a set of high temperature level hot bypasses; and the low temperature refrigeration system is additionally and internally provided with a set of low temperature level cold bypasses and a set of low temperature level hot bypasses. The energy-saving mixed cascade refrigeration system can achieve environment test requirements at the minimum energy consumption, and lowers the power consumption of a testing chamber to the maximum extent, so as to realize the purposes of energy conservation and consumption reduction.
Description
Technical field
The utility model relates to the environmental test equipment field, relates in particular to a kind of mixing cascade refrigeration system that is used for the warm and humid heat test case of height.
Background technology
Conventional cascade refrigeration circulation normally by two independently the single-stage kind of refrigeration cycle form.As shown in Figure 1, temperature range is higher during owing to the operation of left side refrigeration system, is called high temperature level refrigeration system 1; Temperature range was lower when the right side refrigeration system was moved, and was called low temperature level refrigeration system 2.The dual unit cooling system uses different refrigerants respectively; The cascade refrigeration machine generally can be used to produce the low temperature more than-80 ℃, and its operation principle is: high temperature stage compressor 3 sucks low pressure (low temperature) refrigerant vapour that produces in the condenser/evaporator 4 in the compresser cylinder, and the gas that is compressed into high pressure-temperature enters air-cooled condenser 5; In air-cooled condenser 5, become the gas cooled of high pressure-temperature the liquid of high normal pressure and temperature through air or cooling water (air-cooled or two kinds of types of cooling of water-cooled); Liquid is through getting into condenser/evaporator 4 after the choke valve step-down, condenser/evaporator 4 in, absorbs the heat of low temperature level cold-producing medium and gasifies, thereby make the temperature reduction of low temperature level cold-producing medium; The cold-producing medium of the gasification machine of being compressed again siphons away; Therefore, cold-producing medium just in system through overcompression, cooling, throttling, these four processes that gasify, accomplish a circulation.Low temperature level refrigeration system 2 operation principles are the same with high temperature level refrigeration system 1; Its main distinction be cold-producing medium that low temperature level refrigeration system 2 uses with the wind of normal temperature or shipwreck to cool off, cause condensing pressure too high, cisco unity malfunction; Therefore provide cold to cool off low temperature level cold-producing medium through high temperature level kind of refrigeration cycle; Thereby low-temperature refrigerant can be worked under normal condensing pressure,, reach the purpose of refrigeration through condenser/evaporator 4 heat absorptions.
Because the particularity of environmental test chamber, the temperature range that need do is very wide, is generally-70 ℃-130 ℃, and temperature needs accurate constant in an any temperature spot.If have under the situation of heating at the test product of steady temperature near environment temperature or client; Just need to open refrigeration, but this moment, required refrigerating capacity was not very big, for accurate steady temperature; Compressor must be opened always, comes equilibrium temperature to make it to reach constant through heating.
Above-mentioned operation conditions can find out obviously that existing cascade refrigeration system has some not enough: 1, need high low temperature two-stage compressor to open simultaneously and could freeze, energy consumption is big; 2, cascade refrigeration evaporating temperature is lower, and when steady temperature was high, the refrigerating capacity that just seems was excessive; 3, in order to reach the constant of temperature, the heating power of the unnecessary refrigerating capacity of balance is just relatively big so, from and strengthened energy consumption.
The utility model content
The purpose of the utility model is, a kind of energy-conservation mixing cascade refrigeration system is provided, and the requirement that it can reach environmental test with the energy consumption of minimum farthest reduces the power consumption of chamber, realizes energy saving purposes.
For realizing above-mentioned purpose; The utility model provides a kind of energy-conservation mixing cascade refrigeration system; Comprise condenser/evaporator, form high temperature level refrigeration system, and the low temperature level refrigeration system of independent loops with condenser/evaporator respectively; Also have additional one tunnel independently kind of refrigeration cycle, one group of cold bypass of high temperature level, and one group of high temperature level thermal bypass in the said high temperature level refrigeration system, also have additional one group of cold bypass of low temperature level, and one group of low temperature level thermal bypass in the said low temperature level refrigeration system.
Wherein, Include successively the high temperature stage compressor that connects, pressure controller, oil eliminator, air-cooled condenser, oil conservator, device for drying and filtering, magnetic valve, and expansion valve in the said high temperature level refrigeration system; This high temperature stage compressor one end is connected with condenser/evaporator, and this expansion valve one end is connected with condenser/evaporator.
The utility model said one tunnel independently comprises the high temperature level magnetic valve that connects successively, high temperature level capillary, high temperature level hand valve, high temperature level evaporimeter, an and check (non-return) valve in the kind of refrigeration cycle; This high temperature level magnetic valve one end is connected between device for drying and filtering and the magnetic valve, and check (non-return) valve one end is connected between condenser/evaporator and the high temperature stage compressor.
In the utility model, comprise the cold bypass magnetic valve and first capillary that is connected in the cold bypass of said high temperature level, include successively the thermal bypass magnetic valve that connects, second capillary, and first-hand valve in the high temperature level thermal bypass; This cold bypass magnetic valve one end is connected between device for drying and filtering and the high temperature level magnetic valve, and first capillary, one end is connected between second capillary and the first-hand valve; This thermal bypass magnetic valve one end is connected between oil eliminator and the air-cooled condenser, and first-hand valve one end is connected between check (non-return) valve and the high temperature stage compressor.
Further; Include successively the forecooler that connects, oil eliminator, pressure controller, low temperature stage compressor, low temperature level evaporimeter, low temperature level hand valve, low temperature level capillary, low temperature level magnetic valve, and device for drying and filtering in the said low temperature level refrigeration system; This forecooler one end is connected with condenser/evaporator, and this device for drying and filtering one end is connected with condenser/evaporator.
Wherein, Also include successively the pressure-relief valve that connects, allowance for expansion, and three capillary in the said low temperature level refrigeration system; This pressure-relief valve one end is connected between forecooler and the condenser/evaporator, and this three capillary one end is connected between low temperature level evaporimeter and the low temperature stage compressor.
In the utility model, include first magnetic valve and the 4th capillary that is connected in the cold bypass of said low temperature level, include successively second magnetic valve that connects, the 5th capillary, and second-hand's valve in the low temperature level thermal bypass; This first magnetic valve, one end is connected between device for drying and filtering and the low temperature level magnetic valve, and the 4th capillary one end is connected between the 5th capillary and the second-hand's valve; This second magnetic valve, one end is connected between oil eliminator and the forecooler, and second-hand's valve one end is connected between low temperature level evaporimeter and the three capillary.
The energy-conservation mixing cascade refrigeration system of the utility model; The refrigeration design that is particularly useful for the warm and humid heat test case of height and steps into the warm and humid heat test case of formula height, it can select the unlatching of compressor automatically according to different operating modes; Automatically carry out conversion and control; Can reach the requirement of environmental test with the energy consumption of minimum, farthest reduce the power consumption of chamber, thereby in the long-term energy saving purposes that demonstrates fully in service.
Description of drawings
Fig. 1 is the structural representation of cascade refrigeration system in the prior art;
Fig. 2 is the structural representation of a kind of specific embodiment of the energy-conservation mixing cascade refrigeration system of the utility model.
The specific embodiment
As shown in Figure 2, the utility model provides a kind of energy-conservation mixing cascade refrigeration system, comprising: condenser/evaporator 10, form high temperature level refrigeration system 20, and the low temperature level refrigeration system 30 of independent loops with condenser/evaporator 10 respectively.Also have additional one tunnel independently kind of refrigeration cycle, one group of cold bypass of high temperature level, and one group of high temperature level thermal bypass in the said high temperature level refrigeration system 20, also have additional one group of cold bypass of low temperature level, and one group of low temperature level thermal bypass in the said low temperature level refrigeration system 30.
Wherein, Include successively the high temperature stage compressor 21 that connects, pressure controller 22, oil eliminator 23, air-cooled condenser 24, oil conservator 25, device for drying and filtering 26, magnetic valve 27, and expansion valve 28 in the said high temperature level refrigeration system 20; These high temperature stage compressor 21 1 ends are connected with condenser/evaporator 10, and these expansion valve 28 1 ends are connected with condenser/evaporator 10.Special; The utility model said one tunnel independently comprises the high temperature level magnetic valve 201 that connects successively, high temperature level capillary 202, high temperature level hand valve 203, high temperature level evaporimeter 204, an and check (non-return) valve 205 in the kind of refrigeration cycle; These high temperature level magnetic valve 201 1 ends are connected between device for drying and filtering 26 and the magnetic valve 27, and check (non-return) valve 205 1 ends are connected between condenser/evaporator 10 and the high temperature stage compressor 21.
Further, as a kind of specific embodiment of the utility model, comprise the cold bypass magnetic valve 211 and first capillary 212 that are connected in the cold bypass of said high temperature level.Include successively the thermal bypass magnetic valve that connects 221, second capillary 222, and first-hand valve 223 in the high temperature level thermal bypass.Wherein, these cold bypass magnetic valve 211 1 ends are connected between device for drying and filtering 26 and the high temperature level magnetic valve 201, and first capillary, 212 1 ends are connected between second capillary 222 and the first-hand valve 223.These thermal bypass magnetic valve 221 1 ends are connected between oil eliminator 23 and the air-cooled condenser 24, and first-hand valve 223 1 ends are connected between check (non-return) valve 205 and the high temperature stage compressor 21.
In the utility model, include successively the forecooler 31 that connects, oil eliminator 32, pressure controller 33, low temperature stage compressor 34, low temperature level evaporimeter 35, low temperature level hand valve 36, low temperature level capillary 37, low temperature level magnetic valve 38, and device for drying and filtering 39 in the said low temperature level refrigeration system.These forecooler 31 1 ends are connected with condenser/evaporator 10, and these device for drying and filtering 39 1 ends are connected with condenser/evaporator 10.In addition; Also include successively the pressure-relief valve 41 that connects, allowance for expansion 42, and three capillary 43 in the said low temperature level refrigeration system; These pressure-relief valve 41 1 ends are connected between forecooler 31 and the condenser/evaporator 10, and these three capillary 43 1 ends are connected between low temperature level evaporimeter 35 and the low temperature stage compressor 34.
Further, as a kind of specific embodiment of the utility model, include first magnetic valve 311 and the 4th capillary 312 that are connected in the cold bypass of said low temperature level.Include successively second magnetic valve 321 that connects, the 5th capillary 322, and second-hand's valve 323 in the low temperature level thermal bypass.Wherein, these first magnetic valve, 311 1 ends are connected between device for drying and filtering 39 and the low temperature level magnetic valve 38, and the 4th capillary 312 1 ends are connected between the 5th capillary 322 and the second-hand's valve 323.These second magnetic valve, 321 1 ends are connected between oil eliminator 32 and the forecooler 31, and second-hand's valve 323 1 ends are connected between low temperature level evaporimeter 35 and the three capillary 43.
1 ,-20 ℃ the energy-conservation mixing cascade refrigeration system operation principle of the utility model is: temperature-fall period and more than-20 ℃: the limiting temperature that single-stage is produced can reach-40 ℃.Because single-stage is freezed to the condition relative complex of-40 ℃ of needs; Therefore; Here only need to select the single-stage refrigerated medium to try to please readily accessible-20 ℃, automatically perform, only need to start high temperature stage compressor 21 through pressure controller; Accomplish kind of refrigeration cycle through high temperature level evaporimeter 204, another low temperature stage compressor 34 does not then need to start; ℃ 2 ,-20 thermostatic process and more than-20 ℃: single-stage refrigeration; The operation of one compressor; Switch opening time length through controlling to adjust hot and cold bypass magnetic valve and main road magnetic valve; Control gets into the refrigerating capacity of condenser/evaporator 10, need not consume the purpose that heating power comes steady temperature thereby reach; ℃ 3 ,-20--temperature-fall period between 80 ℃: convert cascade refrigeration into, prime main road magnetic valve is changed, and condenser/evaporator 10 is freezed, and condensation low temperature level refrigeration system 30 starts low temperature stage compressor 34 then, is freezed in the operating room; ℃ 4 ,-20--thermostatic process between 80 ℃: adopt cascade refrigeration; Switch opening time length through magnetic valve in the hot and cold bypass of control and regulation low temperature level and main road magnetic valve; Control gets into the refrigerating capacity of condenser/evaporator 10, need not consume the purpose that heating power comes steady temperature thereby reach.
Carry out by the way, contrast conventional cascade refrigeration system, can find out at-20 ℃ and more than-20 ℃ the time, the energy-conservation mixing cascade refrigeration system of the utility model has been practiced thrift the energy that a compressor and heated at constant temperature balance are consumed; At-20 ℃--practiced thrift the energy that the heated at constant temperature balance is consumed between 80 ℃.Its energy consumption can be calculated by following formula: Q=(n*P1+P2) * t, in the formula: Q---wastage in bulk or weight energy (kw/h), n---compressor operating platform number, P1---separate unit compressor horsepower (kw), P2---heating consumed power (kw), t---running time (h).For example: a high-low temperature test chamber adopts conventional cascade refrigeration system; Select two 2H P (power is about 1.5kw) compressor, heating power on average is about 0.7kw when constant, 48 hours constant time; Calculating its energy consumption is: (2*1.5+1) * 48=177.6kw/h, i.e. 177.6 degree.
If adopt the energy-conservation mixing cascade refrigeration system of the utility model, its energy consumption is:
-20 ℃ reach more than-20 ℃: 1*1.5*48=72kw/h, i.e. 72 degree;
-20 ℃--80 ℃ are: 2*1.5*48=144kw/h, i.e. 144 degree.
Through comparing with conventional cascade refrigeration system of the prior art, identical at compressor horsepower, under the running time identical condition, the energy-saving effect highly significant of novel energy-conserving mixing cascade refrigeration system:
When temperature at-20 degree when above, energy-conservation ratio is: (177.6-72)/177.6*100%=59.4%;
When temperature at-20 degree when following, energy-conservation ratio is: (177.6-144)/177.6*100%=18.9%.
In sum, the energy-conservation mixing cascade refrigeration system of the utility model, the refrigeration design that is particularly useful for the warm and humid heat test case of height and steps into the warm and humid heat test case of formula height; They can be according to different operating modes; Automatically select the unlatching of compressor, carry out conversion and control automatically, can reach the requirement of environmental test with the energy consumption of minimum; Farthest reduce the power consumption of chamber, thereby in the long-term energy saving purposes that demonstrates fully in service.
The above; For the person of ordinary skill of the art; Can make other various corresponding changes and distortion according to the technical scheme and the technical conceive of the utility model, and all these changes and distortion all should belong to the protection domain of the utility model accompanying Claim.
Claims (7)
1. energy-conservation mixing cascade refrigeration system; Comprise condenser/evaporator, form high temperature level refrigeration system, and the low temperature level refrigeration system of independent loops with condenser/evaporator respectively; It is characterized in that; Also have additional one tunnel independently kind of refrigeration cycle, one group of cold bypass of high temperature level, and one group of high temperature level thermal bypass in the said high temperature level refrigeration system, also have additional one group of cold bypass of low temperature level, and one group of low temperature level thermal bypass in the said low temperature level refrigeration system.
2. energy-conservation mixing cascade refrigeration system as claimed in claim 1; It is characterized in that; Include successively the high temperature stage compressor that connects, pressure controller, oil eliminator, air-cooled condenser, oil conservator, device for drying and filtering, magnetic valve, and expansion valve in the said high temperature level refrigeration system; This high temperature stage compressor one end is connected with condenser/evaporator, and this expansion valve one end is connected with condenser/evaporator.
3. energy-conservation mixing cascade refrigeration system as claimed in claim 2; It is characterized in that; Said one the tunnel independently comprises the high temperature level magnetic valve that connects successively, high temperature level capillary, high temperature level hand valve, high temperature level evaporimeter, an and check (non-return) valve in the kind of refrigeration cycle; This high temperature level magnetic valve one end is connected between device for drying and filtering and the magnetic valve, and check (non-return) valve one end is connected between condenser/evaporator and the high temperature stage compressor.
4. energy-conservation mixing cascade refrigeration system as claimed in claim 3; It is characterized in that; Comprise the cold bypass magnetic valve and first capillary that is connected in the cold bypass of said high temperature level, include successively the thermal bypass magnetic valve that connects, second capillary, and first-hand valve in the high temperature level thermal bypass; This cold bypass magnetic valve one end is connected between device for drying and filtering and the high temperature level magnetic valve, and first capillary, one end is connected between second capillary and the first-hand valve; This thermal bypass magnetic valve one end is connected between oil eliminator and the air-cooled condenser, and first-hand valve one end is connected between check (non-return) valve and the high temperature stage compressor.
5. energy-conservation mixing cascade refrigeration system as claimed in claim 1; It is characterized in that; Include successively the forecooler that connects, oil eliminator, pressure controller, low temperature stage compressor, low temperature level evaporimeter, low temperature level hand valve, low temperature level capillary, low temperature level magnetic valve, and device for drying and filtering in the said low temperature level refrigeration system; This forecooler one end is connected with condenser/evaporator, and this device for drying and filtering one end is connected with condenser/evaporator.
6. energy-conservation mixing cascade refrigeration system as claimed in claim 5; It is characterized in that; Also include successively the pressure-relief valve that connects, allowance for expansion, and three capillary in the said low temperature level refrigeration system; This pressure-relief valve one end is connected between forecooler and the condenser/evaporator, and this three capillary one end is connected between low temperature level evaporimeter and the low temperature stage compressor.
7. energy-conservation mixing cascade refrigeration system as claimed in claim 6; It is characterized in that; Include first magnetic valve and the 4th capillary that is connected in the cold bypass of said low temperature level, include successively second magnetic valve that connects, the 5th capillary, and second-hand's valve in the low temperature level thermal bypass; This first magnetic valve, one end is connected between device for drying and filtering and the low temperature level magnetic valve, and the 4th capillary one end is connected between the 5th capillary and the second-hand's valve; This second magnetic valve, one end is connected between oil eliminator and the forecooler, and second-hand's valve one end is connected between low temperature level evaporimeter and the three capillary.
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| CN103486754A (en) * | 2013-08-26 | 2014-01-01 | 安徽亿瑞深冷能源科技有限公司 | Energy-saving middle temperature refrigerant/middle temperature refrigerant cascade refrigeration system |
| CN103486755A (en) * | 2013-10-18 | 2014-01-01 | 安徽美乐柯制冷空调设备有限公司 | Carbon dioxide overlapping-type commercial refrigeration system |
| CN104697222A (en) * | 2015-03-06 | 2015-06-10 | 浪潮电子信息产业股份有限公司 | Cloud server low-temperature test system with high heat productivity |
| CN104941707A (en) * | 2015-05-20 | 2015-09-30 | 东莞市科宝试验设备有限公司 | Refrigeration system applied to constant-temperature and constant-humidity test box |
| CN105004088A (en) * | 2015-07-31 | 2015-10-28 | 广东申菱空调设备有限公司 | Cascaded water chilling unit for dual purposes of intermediate temperature and low temperature |
| CN105091389A (en) * | 2015-09-11 | 2015-11-25 | 南通百源制冷设备有限公司 | Compressing and condensing unit with quickly-started low temperature section |
| 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 |
| CN107388613A (en) * | 2017-08-29 | 2017-11-24 | 东莞市伟煌试验设备有限公司 | Superposition type energy-saving refrigerating system |
| CN110849011A (en) * | 2019-12-19 | 2020-02-28 | 海信容声(广东)冷柜有限公司 | Refrigerator and operation method thereof |
| CN112984850A (en) * | 2021-03-23 | 2021-06-18 | 上海理工大学 | Energy-saving high-low temperature environment test box refrigerating system |
| CN113019487A (en) * | 2021-03-02 | 2021-06-25 | 重庆浩生科技有限公司 | Temperature change test system capable of cooling to extremely low temperature at high rate |
| WO2021218344A1 (en) * | 2020-05-22 | 2021-11-04 | 青岛海尔电冰箱有限公司 | Refrigerator |
| WO2021218343A1 (en) * | 2020-05-22 | 2021-11-04 | 青岛海尔电冰箱有限公司 | Refrigerator and control method therefor |
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2012
- 2012-01-13 CN CN2012200161809U patent/CN202420018U/en not_active Expired - Fee Related
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| CN103486754A (en) * | 2013-08-26 | 2014-01-01 | 安徽亿瑞深冷能源科技有限公司 | Energy-saving middle temperature refrigerant/middle temperature refrigerant cascade refrigeration system |
| CN103486754B (en) * | 2013-08-26 | 2015-12-23 | 安徽亿瑞深冷能源科技有限公司 | A kind of energy-conservation middle temperature cold-producing medium/middle temperature cold-producing medium cascade refrigeration system |
| CN103486755A (en) * | 2013-10-18 | 2014-01-01 | 安徽美乐柯制冷空调设备有限公司 | Carbon dioxide overlapping-type commercial refrigeration system |
| CN103486755B (en) * | 2013-10-18 | 2016-02-24 | 安徽美乐柯制冷空调设备有限公司 | A kind of carbon dioxide overlapping-type commercial refrigeration system |
| CN104697222A (en) * | 2015-03-06 | 2015-06-10 | 浪潮电子信息产业股份有限公司 | Cloud server low-temperature test system with high heat productivity |
| CN104941707A (en) * | 2015-05-20 | 2015-09-30 | 东莞市科宝试验设备有限公司 | Refrigeration system applied to constant-temperature and constant-humidity test box |
| CN105004088A (en) * | 2015-07-31 | 2015-10-28 | 广东申菱空调设备有限公司 | Cascaded water chilling unit for dual purposes of intermediate temperature and low temperature |
| CN105091389A (en) * | 2015-09-11 | 2015-11-25 | 南通百源制冷设备有限公司 | Compressing and condensing unit with quickly-started low temperature section |
| 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 |
| CN107388613A (en) * | 2017-08-29 | 2017-11-24 | 东莞市伟煌试验设备有限公司 | Superposition type energy-saving refrigerating system |
| CN110849011A (en) * | 2019-12-19 | 2020-02-28 | 海信容声(广东)冷柜有限公司 | Refrigerator and operation method thereof |
| WO2021218344A1 (en) * | 2020-05-22 | 2021-11-04 | 青岛海尔电冰箱有限公司 | Refrigerator |
| WO2021218343A1 (en) * | 2020-05-22 | 2021-11-04 | 青岛海尔电冰箱有限公司 | Refrigerator and control method therefor |
| CN113739485A (en) * | 2020-05-29 | 2021-12-03 | 青岛海尔电冰箱有限公司 | Refrigerator with a door |
| CN113019487A (en) * | 2021-03-02 | 2021-06-25 | 重庆浩生科技有限公司 | Temperature change test system capable of cooling to extremely low temperature at high rate |
| CN112984850A (en) * | 2021-03-23 | 2021-06-18 | 上海理工大学 | Energy-saving high-low temperature environment test box refrigerating system |
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Granted publication date: 20120905 Termination date: 20160113 |