CN101476793B - Ultra-high temperature air conditioner cooling cycle system - Google Patents

Ultra-high temperature air conditioner cooling cycle system Download PDF

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Publication number
CN101476793B
CN101476793B CN2009101161103A CN200910116110A CN101476793B CN 101476793 B CN101476793 B CN 101476793B CN 2009101161103 A CN2009101161103 A CN 2009101161103A CN 200910116110 A CN200910116110 A CN 200910116110A CN 101476793 B CN101476793 B CN 101476793B
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China
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gas
liquid separator
outlet
temperature
compressor
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Expired - Fee Related
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CN2009101161103A
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Chinese (zh)
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CN101476793A (en
Inventor
王铁军
李彦军
倪宜华
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Hefei University of Technology
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Hefei University of Technology
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Abstract

The invention provides a refrigeration cycle system for ultrahigh-temperature air conditioners, which adopts a mixed working medium consisting of high-temperature refrigerant and intermediate-temperate refrigerant. The system is characterized in that a compressor, a condenser, a front-end gas-liquid separator, an expansion valve positioned at the liquid-phase outlet end of the front-end gas-liquid separator, an evaporator and a back-end gas-liquid separator are sequentially arranged in a main loop where the compressor is according to the flow direction of the refrigerant; the system is provided with an overlapping loop consisting of an evaporative condenser; an inlet of a condensing branch of the evaporative condenser is communicated with a gas-phase outlet of the front-end gas-liquid separator; an outlet of the condensing branch is connected with an inlet of the expansion valve; an inlet of an evaporation branch of the evaporative condenser is connected with a liquid-phase outlet of the front-end gas-liquid separator through a throttle control valve; an outlet of the evaporative condenser and an outlet of the evaporator are jointly connected to the back-end gas-liquid separator; and an outlet of the back-end gas-liquid separator is communicated with an inlet of the compressor. The system has the advantages that the system adopts the common air-conditioning compressor, can realize large temperature-difference refrigeration in a high-temperature environment, and has good working performance and economic performance in a wide temperature range.

Description

A kind of ultra-high temperature air conditioner cooling cycle system
Technical field
The present invention relates to the air-conditioner technical field, be specifically related to a kind of regulate temperature and humidity at hot environment operation and air conditioner with broad operating temperature range.
Background technology
Be used at present hot environment (special high temperature occasion such as smelting iron and steel workshop) air-conditioner cooling cycle system usually as shown in Figure 1, constitute warm cold-producing medium or high temperature refrigerant in adopting in the system by compressor 1, condenser assembly 2, device for drying and filtering 3, choke valve 4, evaporator assemblies 5 and gas-liquid separator 6.
Environment temperature up to 75 ℃ ± 5 ℃ the time, adopt single in the cooling cycle system of warm cold-producing medium, pressure at expulsion and temperature are too high, condensation temperature near or reach critical point, condensation not exclusively or not condensation, the refrigeration system cisco unity malfunction maybe can not be worked, and safety and reliability are difficult to ensure.Adopt the refrigeration system of single high temperature refrigerant that the too small defective of volume refrigerating capacity compressor is not only arranged, and compression ratio is excessive when realizing big temperature-difference refrigerating, delivery temperature is higher, idle call technology of compressors level can not satisfy work requirements at present.
Summary of the invention
The present invention is for avoiding above-mentioned existing in prior technology weak point, provide a kind of simple in structure, implement easily, adopt the compressor of air conditioner of common pressure ratio, not only can outdoor environment temperature up to 75 ℃ ± realize big temperature-difference refrigerating under 5 ℃ of conditions, and than wide environmental temperature range (20~80 ℃), can be safely, the cooling cycle system of reliable, stable and economical operation.
Technical solution problem of the present invention adopts following technical scheme:
The design feature of ultra-high temperature air conditioner cooling cycle system of the present invention is to adopt the mixed working fluid of being made up of high temperature refrigerant and middle temperature cold-producing medium;
Design feature of the present invention is:
In the major loop at compressor place, set gradually compressor, be positioned at the condenser of compressor outlet side, the front end gas-liquid separator that is positioned at the condensator outlet side, the expansion valve that is positioned at the front end gas-liquid separator liquid phase port of export, evaporimeter and rear end gas-liquid separator by refrigerant flow direction;
The interior overlapping loop that setting is made of evaporative condenser, wherein, the condensation branch road of evaporative condenser inlet is connected with the gaseous phase outlet of front end gas-liquid separator, and the inlet that way outlet connects expansion valve is propped up in condensation; The evaporation branch road inlet of evaporative condenser connects the liquid phase outlet of front end flow separator by throttling control valve, the outlet of an evaporation way outlet and evaporimeter inserts the rear end gas-liquid separator jointly, and is communicated with the entrance side of compressor with the outlet of rear end gas-liquid separator.
Design feature of the present invention also is:
Throttling control valve is that to prop up the way outlet operating mode with the evaporation of evaporative condenser be the assignment of traffic control signal.
Between front end gas-liquid separator fluid port and expansion valve connecting pipe is set, the arrival end of throttling control valve is connected with connecting pipe.
Periodic duty process of the present invention is as follows:
1, compressor is discharged high temperature and high pressure gas with the compression of low-temp low-pressure mix refrigerant gas;
2, high-temperature high-pressure refrigerant in condenser to the hot environment heat release.At worst hot case, middle temperature cold-producing medium partial condensation or seldom condensation;
3, the gas-liquid mixed refrigeration working medium separates in gas-liquid separator;
4, partial condensation liquid enters heat absorption evaporation in the evaporative condenser through throttling control valve shunting, step-down, makes the condensation of gas of warm cold-producing medium in being rich in cold excessively;
5, the part supercooled liquid that flows out in the middle temperature cold-producing medium supercooled liquid that flows out from evaporative condenser and the gas-liquid separator mixes, by expansion valve throttling step-down, enter the evaporimeter heat absorption and flash to cryogenic gas, mix with the low-temperature steam that flows out in the gas-liquid separator, turn back to said process 1, the repetitive cycling process.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the present invention adopts the non-azeotropic mixed working medium that senior middle school's temperature cold-producing medium is formed, set up an interior overlapping loop that constitutes by evaporative condenser in the refrigeration system, realize big temperature-difference refrigerating, effectively reduce the real work pressure ratio of compressor, so that reduce the delivery temperature of compressor, the raising system consequently can use the common air-conditioning compressor to realize the superhigh temperature refrigeration in the safety and the reliability of worst hot case.
2, the present invention after the step-down, enters evaporative condenser evaporation heat absorption with throttling control valve splitter section condensate liquid, makes the superheated refrigerant condensation with cold excessively; Described throttling control valve is regulated shunt volume automatically according to working conditions change, works reliably in wider temperature range to guarantee air-conditioning refrigeration system.
3, the present invention is provided with connecting pipe between the fluid port of front end gas-liquid separator and expansion valve, reduction along with operating ambient temperature, the condensation rate of hybrid refrigeration working medium increases, the circulation of throttling control valve reduces automatically, and the flow that directly enters the refrigeration working medium of expansion valve by connecting pipe increases.Can guarantee that with this air-conditioning system is at the wider temperature range reliably working.
4, the present invention can be implemented in the air conditioner refrigerating of environment temperature up to 80 o'clock, and has good working performance and economic performance in wider temperature range, satisfies the man-machine environment demand of particular surroundings.
Description of drawings
Fig. 1 constitutes block diagram for the prior art system.
Fig. 2 constitutes block diagram for system of the present invention.
Number in the figure: 1 compressor, 2 condensers, 3 front end gas-liquid separators, 4 throttling control valves, 5 evaporative condensers, 6 expansion valves, 7 evaporimeters, 8 rear end gas-liquid separators.
Below pass through the specific embodiment, and the invention will be further described in conjunction with the accompanying drawings:
The specific embodiment
The ultra-high temperature air conditioner refrigeration system is to adopt the mixed working fluid of being made up of high temperature refrigerant and middle temperature cold-producing medium in the present embodiment, and the circulatory system constitutes structure and is set to:
In the major loop at compressor 1 place, set gradually compressor 1, be positioned at the condenser 2 of compressor outlet side, the front end gas-liquid separator 3 that is positioned at the condensator outlet side, the expansion valve 6 that is positioned at the front end gas-liquid separator 3 liquid phase ports of export, evaporimeter 7 and rear end gas-liquid separator 8 by refrigerant flow direction;
The interior overlapping loop that setting is made of evaporative condenser 5, wherein, the condensation branch road of evaporative condenser 5 inlet is connected with the gaseous phase outlet of front end gas-liquid separator 3, and the inlet that way outlet connects expansion valve 6 is propped up in condensation; The evaporation branch road inlet of evaporative condenser 5 connects the liquid phase outlet of front end flow separator 3 by throttling control valve 4, the outlet of an evaporation way outlet and evaporimeter 7 inserts rear end gas-liquid separator 8 jointly, and is communicated with the entrance side of compressor 1 with the outlet of rear end gas-liquid separator 8.
In concrete the enforcement, throttling control valve 4 is that to prop up the way outlet operating mode with the evaporation of evaporative condenser 5 be the assignment of traffic control signal; Between front end gas-liquid separator 3 fluid ports and expansion valve 6 connecting pipe is set, the arrival end of throttling control valve 4 is connected with connecting pipe, to guarantee that refrigeration system is at the wider temperature range reliably working.
In addition, directly connect for pipeline between expansion valve 6, evaporimeter 7, rear end gas-liquid separator 8, compressor 1, condenser 2 and the front end gas-liquid separator 3.
Adopt high temperature resistant refrigeration compressor and lubricating oil thereof, form mixed working fluid, use separation and evaporative condenser process, realize big temperature-difference refrigerating and dehumidification function under superhigh temperature (>65 ℃) environment middle temperature condensation of refrigerant with high temperature refrigerant and middle temperature cold-producing medium.The outdoor environment temperature of ultra-high temperature air conditioner kind of refrigeration cycle operation of the present invention reaches as high as 80 ℃, thereby effectively and reliably satisfies the needs of hyperthermal environments air conditioner refrigerating technology.

Claims (3)

1. ultra-high temperature air conditioner cooling cycle system adopts the mixed working fluid of being made up of high temperature refrigerant and middle temperature cold-producing medium, it is characterized in that:
In the major loop at compressor (1) place, by refrigerant flow direction set gradually compressor (1), be positioned at the compressor outlet side condenser (2), be positioned at the condensator outlet side front end gas-liquid separator (3), be positioned at front end gas-liquid separator (3) the liquid phase port of export expansion valve (6), be positioned at the evaporimeter (7) of the expansion valve port of export and be positioned at the rear end gas-liquid separator (8) of evaporator outlet end;
The interior overlapping loop that setting is made of evaporative condenser (5), wherein, the condensation branch road of evaporative condenser (5) inlet is connected with the gaseous phase outlet of described front end gas-liquid separator (3), and the inlet that way outlet connects expansion valve (6) is propped up in condensation; The evaporation branch road inlet of evaporative condenser (5) is connected in the liquid phase outlet and the connecting pipe between the expansion valve (6) of front end gas-liquid separator (3) by throttling control valve (4), the outlet of an evaporation way outlet and evaporimeter (7) inserts rear end gas-liquid separator (8) jointly, and is communicated with the entrance side of compressor (1) with the outlet of described rear end gas-liquid separator (8).
2. ultra-high temperature air conditioner cooling cycle system according to claim 1 is characterized in that described throttling control valve (4) is that to prop up the way outlet operating mode with the evaporation of evaporative condenser (5) be the assignment of traffic control signal.
3. ultra-high temperature air conditioner cooling cycle system according to claim 2, it is characterized in that between described front end gas-liquid separator (3) the liquid phase port of export and expansion valve (6) connecting pipe being set, the arrival end of described throttling control valve (4) is connected with described connecting pipe.
CN2009101161103A 2009-01-22 2009-01-22 Ultra-high temperature air conditioner cooling cycle system Expired - Fee Related CN101476793B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009101161103A CN101476793B (en) 2009-01-22 2009-01-22 Ultra-high temperature air conditioner cooling cycle system

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Application Number Priority Date Filing Date Title
CN2009101161103A CN101476793B (en) 2009-01-22 2009-01-22 Ultra-high temperature air conditioner cooling cycle system

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CN101476793A CN101476793A (en) 2009-07-08
CN101476793B true CN101476793B (en) 2011-03-30

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Publication number Priority date Publication date Assignee Title
CN105546864B (en) * 2016-01-13 2018-05-18 西安交通大学 A kind of Auto-cascade cycle steam compressed refrigerating circulating system of band evaporation subcooler
CN106642681A (en) * 2016-12-20 2017-05-10 东莞市车景汽车配件制造有限公司 Air-energy water heater circulation system and operating method thereof

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Granted publication date: 20110330

Termination date: 20180122