CN201196503Y - Vapor compression refrigeration unit - Google Patents
Vapor compression refrigeration unit Download PDFInfo
- Publication number
- CN201196503Y CN201196503Y CNU2008200571648U CN200820057164U CN201196503Y CN 201196503 Y CN201196503 Y CN 201196503Y CN U2008200571648 U CNU2008200571648 U CN U2008200571648U CN 200820057164 U CN200820057164 U CN 200820057164U CN 201196503 Y CN201196503 Y CN 201196503Y
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- Prior art keywords
- liquid
- compressor
- condenser
- flash evaporation
- refrigeration unit
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- Expired - Lifetime
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 18
- 230000006835 compression Effects 0.000 title claims abstract description 12
- 238000007906 compression Methods 0.000 title claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 230000004888 barrier function Effects 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 abstract description 13
- 230000008020 evaporation Effects 0.000 abstract 6
- 238000001704 evaporation Methods 0.000 abstract 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000005247 gettering Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to a steam compression and refrigeration unit which comprises a compressor, a condenser and an evaporator and also comprises a flash evaporation cylinder; a liquid inlet on the upper end of the flash evaporation cylinder is connected with the condenser; a gas outlet on the upper end of the flash evaporation cylinder is connected with an input port of the compressor through a one-way valve; a liquid outlet on the lower end of the flash evaporation cylinder is connected with the evaporator through a second throttle valve; the flash evaporation cylinder comprises a pair of coaxial throttle orifice plates and a ball floating mechanism, wherein the coaxial throttle orifice plates are connected with the liquid inlet, one of the coaxial throttle orifice plates is fixed; the other coaxial throttle orifice plate is rotary; the ball floating mechanism is arranged on liquid; the ball floating mechanism is connected with one of the throttle orifice plates; a liquid baffle plate extending into the liquid is also arranged between the liquid inlet and the gas outlet; and the side close to the gas outlet is also provided with a liquid level protection mechanism. The steam compression and refrigeration unit has the advantages of effectively controlling the liquid level of a refrigerant in the flash evaporation cylinder in time and well and automatically adapting to the operation of variable working conditions (partial load working conditions and the variable working conditions of the condenser).
Description
Technical field
The utility model relates to a kind of vapor compression refrigeration unit, relates 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 utility model technical issues that need to address 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 utility model is achieved through the following technical solutions:
The utility model comprises: 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 beneficial effects of the utility model are: 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 utility model;
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 utility model is described in further detail:
By Fig. 3, Fig. 4, Fig. 5 as seen: the utility model comprises: 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 utility model 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 utility model 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 utility model 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 |
|---|---|---|---|
| CNU2008200571648U CN201196503Y (en) | 2008-04-11 | 2008-04-11 | Vapor compression refrigeration unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200571648U CN201196503Y (en) | 2008-04-11 | 2008-04-11 | Vapor compression refrigeration unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201196503Y true CN201196503Y (en) | 2009-02-18 |
Family
ID=40416138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200571648U Expired - Lifetime CN201196503Y (en) | 2008-04-11 | 2008-04-11 | Vapor compression refrigeration unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201196503Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101556090B (en) * | 2008-04-11 | 2010-12-08 | 上海瀚艺冷冻机械有限公司 | Vapor compression refrigeration unit |
| CN104236147A (en) * | 2013-06-20 | 2014-12-24 | 重庆美的通用制冷设备有限公司 | Water cooling unit |
| CN106705508A (en) * | 2015-08-07 | 2017-05-24 | 丹佛斯（天津）有限公司 | Flash tank and refrigerating system |
| US9915451B2 (en) | 2013-02-19 | 2018-03-13 | Carrier Corporation | Level control in an evaporator |
| CN115143669A (en) * | 2022-06-29 | 2022-10-04 | 浙江国祥股份有限公司 | Flash evaporation type economizer with ball float valve and control method thereof |
-
2008
- 2008-04-11 CN CNU2008200571648U patent/CN201196503Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101556090B (en) * | 2008-04-11 | 2010-12-08 | 上海瀚艺冷冻机械有限公司 | Vapor compression refrigeration unit |
| US9915451B2 (en) | 2013-02-19 | 2018-03-13 | Carrier Corporation | Level control in an evaporator |
| CN104236147A (en) * | 2013-06-20 | 2014-12-24 | 重庆美的通用制冷设备有限公司 | Water cooling unit |
| CN104236147B (en) * | 2013-06-20 | 2017-02-15 | 重庆美的通用制冷设备有限公司 | Water cooling unit |
| CN106705508A (en) * | 2015-08-07 | 2017-05-24 | 丹佛斯（天津）有限公司 | Flash tank and refrigerating system |
| CN115143669A (en) * | 2022-06-29 | 2022-10-04 | 浙江国祥股份有限公司 | Flash evaporation type economizer with ball float valve and control method thereof |
| CN115143669B (en) * | 2022-06-29 | 2024-06-04 | 浙江国祥股份有限公司 | Flash type economizer with float valve and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090218 |
|
| CX01 | Expiry of patent term |