CN102445016A - Method for preparing large-temperature difference chilled water in single machine two-stage compression manner and special water chilling unit - Google Patents

Method for preparing large-temperature difference chilled water in single machine two-stage compression manner and special water chilling unit Download PDF

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Publication number
CN102445016A
CN102445016A CN2011103629100A CN201110362910A CN102445016A CN 102445016 A CN102445016 A CN 102445016A CN 2011103629100 A CN2011103629100 A CN 2011103629100A CN 201110362910 A CN201110362910 A CN 201110362910A CN 102445016 A CN102445016 A CN 102445016A
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temperature
chilled water
water
loop
low
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CN2011103629100A
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屈国伦
谭海阳
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Guangzhou Design Institute
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Guangzhou Design Institute
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Abstract

The invention relates to a method for preparing large-temperature difference chilled water in a single machine two-stage compression manner and a special water chilling unit, and is characterized in that a refrigerating agent loop and a chilled water loop are arranged in an air conditioner system, wherein the refrigerating agent loop adopts a single machine two-stage compressor and is connected with a condenser by a pipeline, and then is divided into two paths after being condensed by the condenser; one path gets through a high temperature loop throttle device and a high temperature evaporator, and then returns to a suction hole of a high pressure stage section in the compressor; the other path gets through a low temperature loop throttle device and a low temperature evaporator, and then returns to a suction hole of a low pressure stage section in the compressor; a high temperature chilled water return hole is communicated with a low temperature chilled water supply pipe (8) to form a high temperature chilled water loop; and the low temperature chilled water return hole is communicated with the high temperature chilled water outlet to form a low temperature chilled water loop. The method achieves high efficiency and large-compression ratio refrigeration cycle, reduces the wasted work of the compressor, and simultaneously prepares high-low temperature chilled water; the special water chilling unit has the characteristics of achieving double functions on one machine, high efficiency, reducing investment, reducing the floor area of a machine room and the like.

Description

The single machine two-stage compression is produced the method and the special-purpose handpiece Water Chilling Units of big temperature difference chilled water
Technical field
The present invention relates to a kind of single machine two-stage compression and produce the method and the special-purpose handpiece Water Chilling Units of big temperature difference chilled water, be specially adapted to humiture and independently control air-conditioning.Belong to the HVAC technical field.
Background technology
At present, along with country requires increasingly highly to building energy conservation, the air conditioning energy consumption in the building energy consumption energy-conservation becomes in the building energy conservation more and more part and parcel.Main energy consumption equipment in the air-conditioning system comprises handpiece Water Chilling Units and chilled water pump etc., and the former consumes the compressor electrical power for building provides cold, and the latter carries electrical power for carrying a fixed difference difference chilled water to building room consumption.For reducing the conveying energy consumption of chilled water pump, can reduce pump capacity or pump head.At the building air-conditioning water system, after the circuit design of optimizing, can reduce its drag losses, thereby reduce pump head, but circuit design receives building actual conditions and constraint economically.And the flow of water pump under the prerequisite that satisfies the requirement of building cold, can reduce through increasing the chilled water temperature difference, thereby can reduce pump energy consumption.Be twice if the temperature difference increases, then flow reduces half thely, and the water pump conveying energy consumption is reduced to original 1/8.
Yet produce the chilled water of the big temperature difference, can have influence on the power that the handpiece Water Chilling Units compressor consumes, thereby influence the refrigerating efficiency of refrigeration unit; The handpiece Water Chilling Units Energy Efficiency Ratio is reduced, same cold is provided, need more electric weight; Therefore need the new technology of research; Satisfy and both can reduce the water pump conveying energy consumption, can guarantee the air-conditioning system of chiller efficiency again, thereby realize building energy conservation to a greater extent.
Summary of the invention
First purpose of the present invention is in order to overcome existing refrigeration unit can make refrigeration unit when producing the chilled water of the big temperature difference problems such as refrigerating efficiency reduction, to provide a kind of single machine two-stage compression to produce the method for big temperature difference chilled water.
Second purpose of the present invention is in order to provide a kind of single machine two-stage compression to produce the special-purpose handpiece Water Chilling Units of big temperature difference chilled water.This handpiece Water Chilling Units both can provide big temperature difference chilled water, can guarantee that handpiece Water Chilling Units has higher efficient simultaneously.
First purpose of the present invention can reach through following technical scheme:
The single machine two-stage compression is produced the method for big temperature difference chilled water, it is characterized in that:
1) single machine two-stage compression double evaporators handpiece Water Chilling Units is set in air-conditioning system; In described single machine two-stage compression double evaporators handpiece Water Chilling Units, refrigerant loop and chilled water loop are set; Refrigerant loop is made up of in equipment and pipeline cold-producing medium; The chilled water loop is made up of in equipment and pipeline chilled water
2) refrigerant loop; Adopt the single machine two-stage compressor to be connected with condenser through pipeline; The high-temperature high-pressure refrigerant steam of single machine two-stage compressor output is divided into two the tunnel after condenser condenses; Lead up to the suction inlet that returns single machine two-stage compressor inner high voltage level section behind high temperature loop throttling arrangement, the high-temperature evaporator, the suction inlet of low-pressure stage section in the single machine two-stage compressor is returned on another road through low-temperature loop throttling arrangement, cryogenic vaporizer; Said high-temperature low-pressure steam mixes the back and gets into single machine two-stage compressor inner high voltage level section with low temperature and low pressure steam, accomplish high pressure compressed in said hiigh pressure stage section, accomplishes once circulation; Refrigerant vapour after compression gets into condenser again, and beginning is circulation next time;
3) the chilled water loop comprises high temperature chilled water loop and cryogenic freezing water loops; Be provided with high temperature chilled water water return outlet and high temperature chilled water delivery port in the high-temperature evaporator; Be provided with cryogenic freezing water water return outlet and cryogenic freezing water feed water inlet in the cryogenic vaporizer; Be communicated with cryogenic freezing water feed pipe through high temperature chilled water return pipe by high temperature chilled water water return outlet; Constitute high temperature chilled water loop, be communicated with high temperature chilled water delivery port through cryogenic freezing water return pipe, constitute the cryogenic freezing water loops by cryogenic freezing water water return outlet; High temperature chilled water feed water inlet output high temperature chilled water, the chilled water backwater of cryogenic freezing water feed water inlet output passes through high-temperature evaporator and cryogenic vaporizer more successively, is cooled off by twin-stage; Obtain more low temperature water outlet; Be that big temperature difference chilled water is exported in cryogenic freezing water feed water inlet, the chilled water backwater passes through high-temperature evaporator and cryogenic vaporizer successively, is cooled off by twin-stage; Obtain more low temperature water outlet, promptly big temperature difference chilled water is exported in cryogenic freezing water feed water inlet.
First purpose of the present invention can also reach through following technical scheme:
The measure of further dealing with problems is: the 2nd) refrigerant loop; By the high-temperature high-pressure refrigerant steam of said single machine two-stage compressor compresses after condenser condenses; Form the saturated refrigerant liquid of high pressure; The saturated refrigerant liquid of discharging from condenser is divided into two-way: one tunnel process high temperature loop throttling arrangement becomes the saturated refrigerant liquid of high-temperature low-pressure, forms high-temperature low-pressure steam through high-temperature evaporator heat absorption vaporization, gets into the suction inlet of single machine two-stage compressor inner high voltage level section; Another road becomes the saturated refrigerant liquid of low-temp low-pressure through the low-temperature loop throttling arrangement, forms low temperature and low pressure steam through cryogenic vaporizer through the heat absorption vaporization, gets into the suction inlet of low-pressure stage section in the single machine two-stage compressor; Said high-temperature low-pressure steam mixes the back and gets into single machine two-stage compressor inner high voltage level section with low temperature and low pressure steam, accomplish the compression of hiigh pressure stage section; Refrigerant vapour after compression gets into condenser, and beginning is circulation next time.
Second purpose of the present invention can reach through following technical scheme:
The single machine two-stage compression is produced the special-purpose handpiece Water Chilling Units of big temperature difference chilled water, it is characterized in that:
1) it comprises single machine two-stage compressor, condenser, high temperature loop throttling arrangement and low-temperature loop throttling arrangement, high-temperature evaporator, cryogenic vaporizer, big temperature difference chilled water return pipe and big temperature difference chilled water feed pipe:
2) said single machine two-stage compressor comprises low-pressure stage section and hiigh pressure stage section; The output of low-pressure stage section is connected with the input of hiigh pressure stage section through pipeline; The output of the hiigh pressure stage section of said single machine two-stage compressor is connected with the input of condenser; One of one of output of said condenser input through high temperature loop throttling arrangement and high-temperature evaporator is connected, and two of the output of condenser passes through one of input of low-temperature loop throttling arrangement and cryogenic vaporizer and is connected; One of output of high-temperature evaporator is connected with the low-pressure stage section of single machine two-stage compressor and the pipeline between the hiigh pressure stage section, and one of output of cryogenic vaporizer is connected with the input of the low-pressure stage section of single machine two-stage compressor; Constitute refrigerant loop;
3) the chilled water loop comprises high temperature chilled water loop and cryogenic freezing water loops; Be provided with high temperature chilled water water return outlet and high temperature chilled water delivery port in the high-temperature evaporator; Be provided with cryogenic freezing water water return outlet and cryogenic freezing water feed water inlet in the cryogenic vaporizer; Be communicated with cryogenic freezing water feed pipe through high temperature chilled water return pipe by high temperature chilled water water return outlet; Constitute high temperature chilled water loop, be communicated with high temperature chilled water delivery port through cryogenic freezing water return pipe, constitute the cryogenic freezing water loops by cryogenic freezing water water return outlet.
The invention has the beneficial effects as follows:
1, the present invention is because single machine two-stage is compressed in design and double evaporators combines; Has the split-compressor structure; Therefore through utilizing high-temperature evaporator steam discharge cooling double-stage compressor low-pressure stage section exhaust temperature; Promptly reduce the suction stripping temperature of double-stage compressor hiigh pressure stage section, thereby can realize big compression ratio kind of refrigeration cycle, and guarantee refrigeration unit efficient.
2, the present invention is owing to design the freezing mechanism of secondary, and cold water passes through two evaporimeters of height evaporating temperature successively, can produce big temperature difference cold water, and the high-temperature evaporator evaporating temperature is higher than conventional unit, and the handpiece Water Chilling Units efficiency can improve greatly.Can both realize producing of big temperature difference chilled water, reduce the conveying energy consumption of air-conditioner water system, can guarantee the handpiece Water Chilling Units refrigerating efficiency again.
Description of drawings
Fig. 1 is a theory diagram of the present invention.
The specific embodiment
Specific embodiment:
With reference to Fig. 1, the special-purpose handpiece Water Chilling Units that the single machine two-stage compression that present embodiment uses is produced big temperature difference chilled water comprises single machine two-stage compressor 1, condenser 2, high temperature loop throttling arrangement 3, low-temperature loop throttling arrangement 4, high-temperature evaporator 5, cryogenic vaporizer 6, big temperature difference chilled water return pipe 7 and big temperature difference chilled water feed pipe 8; Single machine two-stage compressor 1 comprises low-pressure stage section 1-1 and hiigh pressure stage section 1-2; The output of low-pressure stage section 1-1 is connected with the input of hiigh pressure stage section 1-2 through pipeline; The output of the hiigh pressure stage section 1-2 of said single machine two-stage compressor 1 is connected with the input of condenser 2; One of one of output of said condenser 2 input through high temperature loop throttling arrangement 3 and high-temperature evaporator 5 is connected, and two of the output of condenser 2 passes through one of input of low-temperature loop throttling arrangement 4 and cryogenic vaporizer 6 and is connected; One of output of high-temperature evaporator 5 is connected with the low-pressure stage section 1-1 of single machine two-stage compressor 1 and the pipeline between the hiigh pressure stage section 1-2, and one of output of cryogenic vaporizer 6 is connected with the input of the low-pressure stage section 1-1 of single machine two-stage compressor 1; Thereby formation refrigerant loop; The chilled water loop comprises high temperature chilled water loop and cryogenic freezing water loops; Be provided with high temperature chilled water water return outlet and high temperature chilled water delivery port in the high-temperature evaporator 5; Be provided with cryogenic freezing water water return outlet and cryogenic freezing water feed water inlet in the cryogenic vaporizer 6; Be communicated with cryogenic freezing water feed pipe 8 through high temperature chilled water return pipe 7 by high temperature chilled water water return outlet; Constitute high temperature chilled water loop, be communicated with high temperature chilled water delivery port through cryogenic freezing water return pipe, constitute the cryogenic freezing water loops by cryogenic freezing water water return outlet.
In the present embodiment: single machine two-stage compressor 1, condenser 2, high temperature loop throttling arrangement 3, low-temperature loop throttling arrangement 4, high-temperature evaporator 5, cryogenic vaporizer 6, can adopt single machine two-stage compressor, condenser, high temperature loop throttling arrangement, low-temperature loop throttling arrangement, high-temperature evaporator, the cryogenic vaporizer of routine techniques.
Operation principle of the present invention:
With reference to Fig. 1; Cold-producing medium gets into condenser 2 after compressing through the compressor twin-stage, and cold-producing medium is through after the condensation; Be divided into two parts; Pass through high temperature loop throttling arrangement 3 and low-temperature loop throttling arrangement 4 respectively, thereby obtain the refrigerant liquid of two kinds of temperature of height and pressure, get into high-temperature evaporator 5 and cryogenic vaporizer 6 respectively.The chilled water backwater passes through high-temperature evaporator 5 and cryogenic vaporizer 6 successively, by the twin-stage cooling, thereby obtains more low temperature water outlet.Cold-producing medium is the heat absorption vaporization in high-temperature evaporator 5 and cryogenic vaporizer 6; Cryogenic vaporizer 5 steam discharges get into the suction inlet of low-pressure stage section 1-1 in the single machine two-stage compressor 1; After low-pressure stage section 1-1 compression; This part refrigerant vapour with from the vapor mixing of high-temperature evaporator 5, get into single machine two-stage compressor 1 inner high voltage level section 1-2 after being cooled together, accomplish the compression of hiigh pressure stage section.Refrigerant vapour after compression gets into condenser 2, and beginning is circulation next time.
The chilled water loop comprises high temperature chilled water loop and cryogenic freezing water loops; Be communicated with cryogenic freezing water feed pipe through high temperature chilled water return pipe by high temperature chilled water water return outlet; Constitute high temperature chilled water loop; Be communicated with high temperature chilled water delivery port through cryogenic freezing water return pipe by cryogenic freezing water water return outlet, constitute the cryogenic freezing water loops; High temperature chilled water feed water inlet output high temperature chilled water, the chilled water backwater of cryogenic freezing water feed water inlet output passes through high-temperature evaporator 5 and cryogenic vaporizer 6 more successively, is cooled off by twin-stage; Obtain more low temperature water outlet; Be that big temperature difference chilled water is exported in cryogenic freezing water feed water inlet, the chilled water backwater passes through high-temperature evaporator and cryogenic vaporizer successively, is cooled off by twin-stage; Obtain more low temperature water outlet, promptly big temperature difference chilled water is exported in cryogenic freezing water feed water inlet.Be the backwater in the high temperature chilled water return pipe 7, the high-temperature evaporator 5 of at first flowing through is realized the phase I cooling; The cryogenic vaporizer 6 of flowing through after cooling is realized further cooling, thereby is obtained lower chilled water temperature, accomplishes big temperature difference chilled water and produces.
The above; Be merely the preferable specific embodiment of the present invention; But protection scope of the present invention is not limited thereto; Any technical staff who is familiar with the present technique field is equal to replacement or change according to technical scheme of the present invention and inventive concept thereof in the scope that the present invention discloses, all belong to protection scope of the present invention.

Claims (3)

1. the single machine two-stage compression is produced the method for big temperature difference chilled water, it is characterized in that:
1) single machine two-stage compression double evaporators handpiece Water Chilling Units is set in air-conditioning system; In described single machine two-stage compression double evaporators handpiece Water Chilling Units, refrigerant loop and chilled water loop are set; Refrigerant loop is made up of in equipment and pipeline cold-producing medium; The chilled water loop is made up of in equipment and pipeline chilled water
2) refrigerant loop; Adopt the single machine two-stage compressor to be connected with condenser through pipeline; The high-temperature high-pressure refrigerant steam of single machine two-stage compressor output is divided into two the tunnel after condenser condenses; Lead up to the suction inlet that returns single machine two-stage compressor inner high voltage level section behind high temperature loop throttling arrangement, the high-temperature evaporator, the suction inlet of low-pressure stage section in the single machine two-stage compressor is returned on another road through low-temperature loop throttling arrangement, cryogenic vaporizer; Said high-temperature low-pressure steam mixes the back and gets into single machine two-stage compressor inner high voltage level section with low temperature and low pressure steam, accomplish high pressure compressed in said hiigh pressure stage section, accomplishes once circulation; Refrigerant vapour after compression gets into condenser again, and beginning is circulation next time;
3) the chilled water loop comprises high temperature chilled water loop and cryogenic freezing water loops; Be provided with high temperature chilled water water return outlet and high temperature chilled water delivery port in the high-temperature evaporator; Be provided with cryogenic freezing water water return outlet and cryogenic freezing water feed water inlet in the cryogenic vaporizer; Be communicated with cryogenic freezing water feed pipe through high temperature chilled water return pipe by high temperature chilled water water return outlet; Constitute high temperature chilled water loop, be communicated with high temperature chilled water delivery port through cryogenic freezing water return pipe, constitute the cryogenic freezing water loops by cryogenic freezing water water return outlet; High temperature chilled water feed water inlet output high temperature chilled water; The chilled water backwater of cryogenic freezing water feed water inlet output passes through high-temperature evaporator (5) and cryogenic vaporizer (6) more successively, by the twin-stage cooling, obtains more low temperature water outlet; Be that cryogenic freezing water feed water inlet is exported big temperature difference chilled water chilled water backwater and passed through high-temperature evaporator and cryogenic vaporizer successively; By the twin-stage cooling, obtain more low temperature water outlet, promptly big temperature difference chilled water is exported in cryogenic freezing water feed water inlet.
2. single machine two-stage compression according to claim 1 is produced the method for big temperature difference chilled water; It is characterized in that: the 2nd) refrigerant loop; By the high-temperature high-pressure refrigerant steam of said single machine two-stage compressor compresses after condenser condenses; Form the saturated refrigerant liquid of high pressure; The saturated refrigerant liquid of discharging from condenser is divided into two-way: one tunnel process high temperature loop throttling arrangement becomes the saturated refrigerant liquid of high-temperature low-pressure, forms high-temperature low-pressure steam through high-temperature evaporator heat absorption vaporization, gets into the suction inlet of single machine two-stage compressor inner high voltage level section; Another road becomes the saturated refrigerant liquid of low-temp low-pressure through the low-temperature loop throttling arrangement, forms low temperature and low pressure steam through cryogenic vaporizer through the heat absorption vaporization, gets into the suction inlet of low-pressure stage section in the single machine two-stage compressor; Said high-temperature low-pressure steam mixes the back and gets into single machine two-stage compressor inner high voltage level section with low temperature and low pressure steam, accomplish the compression of hiigh pressure stage section; Refrigerant vapour after compression gets into condenser, and beginning is circulation next time.
3. the single machine two-stage compression is produced the special-purpose handpiece Water Chilling Units of big temperature difference chilled water, it is characterized in that:
1) it comprises single machine two-stage compressor (1), condenser (2), high temperature loop throttling arrangement (3) and low-temperature loop throttling arrangement (4), high-temperature evaporator (5), cryogenic vaporizer (6), big temperature difference chilled water return pipe (7) and big temperature difference chilled water feed pipe (8);
2) said single machine two-stage compressor (1) comprises low-pressure stage section (1-1) and hiigh pressure stage section (1-2); The output of low-pressure stage section (1-1) is connected with the input of hiigh pressure stage section (1-2) through pipeline; The output of the hiigh pressure stage section (1-2) of said single machine two-stage compressor (1) is connected with the input of condenser (2); One of one of output of said condenser (2) input through high temperature loop throttling arrangement (3) and high-temperature evaporator (5) is connected, and two of the output of condenser (2) passes through one of input of low-temperature loop throttling arrangement (4) and cryogenic vaporizer (6) and is connected; One of output of high-temperature evaporator (5) is connected with the low-pressure stage section (1-1) of single machine two-stage compressor (1) and the pipeline between the hiigh pressure stage section (1-2), and one of output of cryogenic vaporizer (6) is connected with the input of the low-pressure stage section (1-1) of single machine two-stage compressor (1); Constitute refrigerant loop;
3) the chilled water loop comprises high temperature chilled water loop and cryogenic freezing water loops; Be provided with high temperature chilled water water return outlet and high temperature chilled water delivery port in the high-temperature evaporator (5); Be provided with cryogenic freezing water water return outlet and cryogenic freezing water feed water inlet in the cryogenic vaporizer (6); Be communicated with cryogenic freezing water feed pipe (8) through high temperature chilled water return pipe (7) by high temperature chilled water water return outlet; Constitute high temperature chilled water loop, be communicated with high temperature chilled water delivery port through cryogenic freezing water return pipe, constitute the cryogenic freezing water loops by cryogenic freezing water water return outlet.
CN2011103629100A 2011-11-16 2011-11-16 Method for preparing large-temperature difference chilled water in single machine two-stage compression manner and special water chilling unit Pending CN102445016A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109708337A (en) * 2019-03-04 2019-05-03 北京热科能源技术研究有限公司 Plural serial stage compression type heat pump assembly
WO2020042768A1 (en) * 2018-08-28 2020-03-05 艾默生环境优化技术(苏州)有限公司 Refrigerant circulation system

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CN1137359C (en) * 2001-04-20 2004-02-04 清华大学 Lithium bromide absorption type refrigerator suitable for large temp differnece and able to fully utilize energy
CN1715807A (en) * 2004-07-01 2006-01-04 清华大学 Double temperature cold water unit for air conditioning system
CN1292216C (en) * 2005-04-07 2006-12-27 上海交通大学 Refrigerating unit of double-temperature refrigerator car
CN101532742A (en) * 2009-04-23 2009-09-16 福州市仓山区宇泓空调节能技术有限公司 Parallel type thermal differential evaporation cold (hot) water machine
CN201527132U (en) * 2009-08-20 2010-07-14 广州恒星冷冻机械制造有限公司 Large temperature difference water chilling unit with double evaporators in serials connection

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1137359C (en) * 2001-04-20 2004-02-04 清华大学 Lithium bromide absorption type refrigerator suitable for large temp differnece and able to fully utilize energy
CN1715807A (en) * 2004-07-01 2006-01-04 清华大学 Double temperature cold water unit for air conditioning system
CN1292216C (en) * 2005-04-07 2006-12-27 上海交通大学 Refrigerating unit of double-temperature refrigerator car
CN101532742A (en) * 2009-04-23 2009-09-16 福州市仓山区宇泓空调节能技术有限公司 Parallel type thermal differential evaporation cold (hot) water machine
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020042768A1 (en) * 2018-08-28 2020-03-05 艾默生环境优化技术(苏州)有限公司 Refrigerant circulation system
CN109708337A (en) * 2019-03-04 2019-05-03 北京热科能源技术研究有限公司 Plural serial stage compression type heat pump assembly
CN109708337B (en) * 2019-03-04 2021-10-01 北京热科能源技术研究有限公司 Multistage series compression heat pump unit

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Application publication date: 20120509