CN101556090A - Vapor compression refrigeration unit - Google Patents
Vapor compression refrigeration unit Download PDFInfo
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- CN101556090A CN101556090A CNA2008100359447A CN200810035944A CN101556090A CN 101556090 A CN101556090 A CN 101556090A CN A2008100359447 A CNA2008100359447 A CN A2008100359447A CN 200810035944 A CN200810035944 A CN 200810035944A CN 101556090 A CN101556090 A CN 101556090A
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Abstract
The invention relates to a vapor compression refrigeration unit comprising a compressor, a condenser, an evaporator and a flash evaporation cylinder. A liquid inlet at the upper end of the flash evaporation cylinder is connected with the condenser, an air outlet at the upper end of the flash evaporation cylinder is connected with an input port of the compressor through a one-way valve, and a liquid outlet at the lower end of the flash evaporation cylinder is connected with the evaporator through a second throttle valve. The flash evaporation cylinder internally comprises a pair of coaxial throttle orifice plates connected with the liquid inlet, a floating ball mechanism, a liquid baffle extending into the liquid, and a liquid level protection mechanism, wherein one of the coaxial throttle orifice plates is fixed, and the other one rotates; the floating ball mechanism is arranged on the liquid and connected with one of the coaxial throttle valve plates; the baffle plate extending into the liquid is arranged between the liquid inlet and the air outlet; and the liquid level protection mechanism is arranged at a position near the air outlet. The invention has the advantages that the vapor compression refrigeration unit can effectively control the liquid level of refrigerating fluid in the flash evaporation cylinder in time and can well automatically adapt to the running under variable working conditions (partial load working condition and variable working conditions of the condenser) of the compressor.
Description
Technical field
The present invention relates to a kind of vapor compression refrigeration unit, relate in particular to the economizer in this vapor compression refrigeration unit.
Background technology
Common compression-type refrigerating system is by evaporimeter, compressor, condenser, four parts of expansion gear, and the Two-phase Flow Pipeline Transport that connects between these four parts is formed.
Except the above-mentioned basic element of character, refrigeration system can also comprise other parts, improves the thermodynamic efficiency of refrigeration system.Especially in the cryogenic freezing refrigeration system, refrigerating capacity and efficient in order to improve refrigeration system generally include economizer circuit in the refrigeration system.It is well-known that this of economizer circuit kind is applied in refrigerating field.It is with economizer circuit and the general names of device assembles on public support such as screw compressor group that have middle tonifying Qi hole.It by screw compressor after air-breathing finishing, by entering in the compression chamber of compressor from the refrigerant vapour of economizer middle gas supplementing opening by screw compressor, mix with the gas in the compressor, tonifying Qi process in the middle of realizing improves refrigerating capacity and the coefficient of refrigerating performance of compressor bank under worst cold case.
The economizer of available technology adopting has heat exchanger and flash drum dual mode.
As seen from Figure 1: the high pressure refrigerant liquid of coming out from condenser 2, flow to heat exchanger 4 porch and be divided into two-way, one road refrigerant liquid directly enters heat exchanger 4, other one road refrigerant liquid first throttle valve 5 of flowing through is entered heat exchanger 4 again after the step-down, and absorb the heat of bypass refrigerant liquid at heat exchanger, get back to compressor 1 middle air entry after being evaporated to gas, and directly enter one road refrigerant liquid of heat exchanger, produced cold because of siphoned away heat by bypass refrigerant, again through entering evaporimeter 3 after 6 step-downs of second choke valve, enter compressor low pressure air suction mouth after being evaporated to steam, enter condenser through after the compressor compresses, be condensed into highly pressurised liquid, and continue above-mentioned circulation.
But above-mentioned shortcoming is very remarkable, owing to adopt heating power expansion valve to play the effect of first throttle valve, so the gas pressure after expanding follows the temperature of high pressure liquid refrigerant that direct correlation is arranged, can not have sufficient steam to mend the middle port of compressor.
As seen from Figure 2: the high pressure refrigerant liquid of coming out from condenser 2, enter flash drum 40 after the throttling of the first order of flowing through choke valve, after the flash steam that produces separates the drop of sneaking into by vapor-liquid separating device, enter compressor 1 middle air entry, enter condenser through after the compressor compresses, be condensed into highly pressurised liquid, and continue above-mentioned circulation; Among the figure: evaporimeter 3, second choke valve 6, fluid level control device 7, fluid level control valve 8.
Though refrigerating economizer system shown in Figure 2 adopts the very high fluid level control device (part 7,8) of cost to replace the first throttle valve, but the control target of fluid level control device (part 7,8) is to keep constant liquid level in the flash drum, constant gas pressure in the corresponding flash drum of the interior constant liquid level of flash drum.When refrigeration unit when design conditions are worked, the economizer efficient height that economizer efficient shown in Figure 2 is more shown in Figure 1.But when refrigeration unit in off-design behaviour when work time, the efficient of the economizer of these two kinds of patterns has just obviously reduced: the gettering ability that all can not make full use of air entry in the middle of the compressor.
Summary of the invention
The technical issues that need to address of the present invention have provided a kind of vapor compression refrigeration unit, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
The present invention includes: compressor, condenser, evaporimeter; Also comprise a flash drum; Described flash drum upper end inlet and condenser joins, the gas outlet, upper end by an input port of check valve and compressor join, the lower end liquid outlet joins by second choke valve and evaporimeter; Comprise in the described flash drum: a pair of coaxial restricting orifice that joins with inlet; Fixing, another rotation in the described coaxial restricting orifice; A ball float mechanism that is placed on the liquid; One in described ball float mechanism and the restricting orifice joins; Between described inlet and gas outlet, also settled a liquid barrier that gos deep in the liquid, also settled a liquid level protection mechanism near air outlet side.
Compared with prior art, the invention has the beneficial effects as follows: can control the liquid level of the cold-producing medium in the flash drum timely and effectively, and can be good at adapting to automatically the variable working condition running (variable working condition of partial load condition, condenser) of compressor.
Description of drawings
Fig. 1 is the economizer of available technology adopting heat exchanger mode and evaporimeter, compressor, condenser combining structure schematic diagram;
Fig. 2 is the economizer of available technology adopting flash drum mode and evaporimeter, compressor, condenser combining structure schematic diagram;
Fig. 3 is a structural representation of the present invention;
Fig. 4 is a flash drum cross-sectional view among Fig. 3.
Fig. 5 is an I place enlarged drawing among Fig. 4.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described in further detail:
By Fig. 3, Fig. 4, Fig. 5 as seen: the present invention includes: compressor 1, condenser 2, evaporimeter 3; Also comprise a flash drum 400; Described flash drum 400 upper end inlets 401 join with condenser 2, gas outlet, upper end 402 by an input port of check valve 11 and compressor 1 join, lower end liquid outlet 403 joins with evaporimeter 3 by second choke valve 6; Comprise in the described flash drum 400: a pair of coaxial restricting orifice 404 that joins with inlet 401; Fixing, another rotation in the described coaxial restricting orifice 404; A ball float mechanism 405 that is placed on the liquid; One in described ball float mechanism 405 and the restricting orifice 404 joins; Between described inlet 401 and gas outlet 402, also settled a liquid barrier 406 that gos deep in the liquid, also settled a liquid level protection mechanism 407 near gas outlet 402 sides;
Described flash drum 400 is cylindrical units.
The present invention is a cylindrical unit, be welded with the inlet and outlet piping of liquid refrigerant on this, the outlet pipe of gaseous refrigerant, one cover vapor-liquid separating device is housed in this tube, liquid refrigerant advances to be welded with a pair of restricting orifice that can rotate around common axle on the feed tube of flash drum that (one of them can not rotate this a pair of orifice plate, the another one orifice plate can rotate), and the ball float mechanism that power is provided for the orifice plate rotation.Owing to the identical hole of quantity is all arranged on these two orifice plates, when rotating with one of them orifice plate, the size of the circulation passage between two orifice plates can change.By the simple and reliable mechanical device of this cover, can control the liquid level of the cold-producing medium in the flash drum timely and effectively like this, and can be good at adapting to automatically the variable working condition running (variable working condition of partial load condition, condenser) of compressor.
The present invention is a kind of can extensively being suitable for and air-cooled, water-cooled vapor compression refrigeration unit energy-saving appliance, and this invention is cheap, rational in infrastructure, can extensively adapt to the various running operating modes of vapor compression refrigeration unit.
The present invention is through actual detected, and when using in the water-cooling screw rod handpiece Water Chilling Units (standard condition), refrigerating capacity increases by 18%, and cop increases by 8%, exceeds much than the economizer of prior art.And it is should invention increase of refrigerating capacity and cop when variable working condition is turned round also high than the economizer of prior art.
Claims (2)
1. a vapor compression refrigeration unit comprises: compressor, condenser, evaporimeter; Also comprise a flash drum; It is characterized in that: described flash drum upper end inlet and condenser joins, the gas outlet, upper end by an input port of check valve and compressor join, the lower end liquid outlet joins by second choke valve and evaporimeter; Comprise in the described flash drum: a pair of coaxial restricting orifice that joins with inlet; Fixing, another rotation in the described coaxial restricting orifice; A ball float mechanism that is placed on the liquid; One in described ball float mechanism and the restricting orifice joins; Between described inlet and gas outlet, also settled a liquid barrier that gos deep in the liquid, also settled a liquid level protection mechanism near air outlet side.
2. vapor compression refrigeration unit according to claim 1 is characterized in that: described flash drum is a cylindrical unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100359447A CN101556090B (en) | 2008-04-11 | 2008-04-11 | Vapor compression refrigeration unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100359447A CN101556090B (en) | 2008-04-11 | 2008-04-11 | Vapor compression refrigeration unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101556090A true CN101556090A (en) | 2009-10-14 |
| CN101556090B CN101556090B (en) | 2010-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100359447A Expired - Fee Related CN101556090B (en) | 2008-04-11 | 2008-04-11 | Vapor compression refrigeration unit |
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| Country | Link |
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| CN (1) | CN101556090B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102601314A (en) * | 2012-03-26 | 2012-07-25 | 苏州明志科技有限公司 | Heating and cooling integrated machine of metal mould |
| CN103245130A (en) * | 2012-02-14 | 2013-08-14 | 天华化工机械及自动化研究设计院有限公司 | Method for recycling heat and water in dried tail gas by heat pump working media and device of method |
| CN105674627A (en) * | 2016-03-28 | 2016-06-15 | 侴乔力 | Steam modulator driven by water source heat pump |
| CN105698440A (en) * | 2016-03-28 | 2016-06-22 | 侴乔力 | Water vapor preparer driven by air source heat pump |
| CN106705508A (en) * | 2015-08-07 | 2017-05-24 | 丹佛斯（天津）有限公司 | Flash tank and refrigerating system |
| CN109128121A (en) * | 2018-10-30 | 2019-01-04 | 苏州奥天诚机械有限公司 | Cooling structure for liquid metal solidification |
| CN109405321A (en) * | 2018-12-29 | 2019-03-01 | 无锡雪浪环境科技股份有限公司 | A kind of steam compression type refrigeration circulatory system and its application method |
| EP4242557A1 (en) * | 2022-03-10 | 2023-09-13 | Carrier Corporation | Throttling device and refrigeration system having the same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5174123A (en) * | 1991-08-23 | 1992-12-29 | Thermo King Corporation | Methods and apparatus for operating a refrigeration system |
| US5775117A (en) * | 1995-10-30 | 1998-07-07 | Shaw; David N. | Variable capacity vapor compression cooling system |
| US5692389A (en) * | 1996-06-28 | 1997-12-02 | Carrier Corporation | Flash tank economizer |
| US7299649B2 (en) * | 2003-12-09 | 2007-11-27 | Emerson Climate Technologies, Inc. | Vapor injection system |
| US6941769B1 (en) * | 2004-04-08 | 2005-09-13 | York International Corporation | Flash tank economizer refrigeration systems |
| CN201196503Y (en) * | 2008-04-11 | 2009-02-18 | 上海瀚艺冷冻机械有限公司 | Vapor compression refrigeration unit |
-
2008
- 2008-04-11 CN CN2008100359447A patent/CN101556090B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245130A (en) * | 2012-02-14 | 2013-08-14 | 天华化工机械及自动化研究设计院有限公司 | Method for recycling heat and water in dried tail gas by heat pump working media and device of method |
| CN103245130B (en) * | 2012-02-14 | 2015-10-07 | 天华化工机械及自动化研究设计院有限公司 | A kind of method of heat pump fluid circulation and stress dried tail gas heat and water and device thereof |
| CN102601314A (en) * | 2012-03-26 | 2012-07-25 | 苏州明志科技有限公司 | Heating and cooling integrated machine of metal mould |
| CN106705508A (en) * | 2015-08-07 | 2017-05-24 | 丹佛斯（天津）有限公司 | Flash tank and refrigerating system |
| CN105674627A (en) * | 2016-03-28 | 2016-06-15 | 侴乔力 | Steam modulator driven by water source heat pump |
| CN105698440A (en) * | 2016-03-28 | 2016-06-22 | 侴乔力 | Water vapor preparer driven by air source heat pump |
| CN109128121A (en) * | 2018-10-30 | 2019-01-04 | 苏州奥天诚机械有限公司 | Cooling structure for liquid metal solidification |
| CN109405321A (en) * | 2018-12-29 | 2019-03-01 | 无锡雪浪环境科技股份有限公司 | A kind of steam compression type refrigeration circulatory system and its application method |
| EP4242557A1 (en) * | 2022-03-10 | 2023-09-13 | Carrier Corporation | Throttling device and refrigeration system having the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101556090B (en) | 2010-12-08 |
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