CN202133170U - Liquid level control system of flooded refrigerating unit - Google Patents
Liquid level control system of flooded refrigerating unit Download PDFInfo
- Publication number
- CN202133170U CN202133170U CN201120198454U CN201120198454U CN202133170U CN 202133170 U CN202133170 U CN 202133170U CN 201120198454 U CN201120198454 U CN 201120198454U CN 201120198454 U CN201120198454 U CN 201120198454U CN 202133170 U CN202133170 U CN 202133170U
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- China
- Prior art keywords
- economizer
- communicated
- heat exchanger
- flooded evaporator
- control system
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Air Conditioning Control Device (AREA)
Abstract
The utility model discloses a liquid level control system of a flooded refrigerating unit. The liquid level control system comprises a flooded evaporator, a compressor, a condenser, an economizer, an ejector and a heat exchanger, wherein, the flooded evaporator, the compressor and the condenser are connected sequentially; the liquid outlet of the condenser is connected with the liquid inlet of the economizer; the liquid outlet of the economizer is connected with the inlet of the flooded evaporator; the liquid surface point interface of the flooded evaporator is connected with the inlet of the heat exchanger; and the high-pressure port, exhaust port and injecting port of the ejector are respectively connected with the exhaust port of the economizer, the air absorbing port of the compressor and the outlet of the heat exchanger. In the utility model, the economizer and exhaust and eject devices are adopted and refrigerant overheat degree of the outlet of the heat exchanger on an ejected pipeline is adopted to control a main throttling valve, so the liquid level of the flooded evaporator can be controlled stably, and the efficient ejection and oil return of the evaporator can also be controlled. Therefore, the liquid level control system has the advantages of high efficiency, low cost, and high practical value.
Description
Technical field
The utility model relates to air-conditioning refrigeration system, specifically is a kind of full-liquid type refrigeration unit tank level control system.
Background technology
Especially there is the too high problem of fluid level control device cost in some refrigeration systems for the refrigeration system that adopts flooded evaporator.Electric expansion valve is then adopted in liquid level control mostly, utilize return-air degree of superheat control liquid level, but the flooded evaporator return-air degree of superheat is very little; The control difficulty is big; Heating power expansion valve can't be suitable for, and the cost of electronic expansion valve controls liquid level is higher, the control system is comparatively complicated.
The utility model content
The technical problem that the utility model will solve provides a kind of tank level control system of full-liquid type refrigeration unit, and it is very little to solve the flooded evaporator return-air degree of superheat, the big problem of control difficulty.
The technical scheme of the utility model is:
A kind of tank level control system of full-liquid type refrigeration unit comprises flooded evaporator, compressor, condenser, economizer, injector and heat exchanger; Described flooded evaporator, compressor, condenser are communicated with successively; The liquid outlet of condenser is communicated with the inlet of economizer; The leakage fluid dram of economizer is communicated with the import of flooded evaporator; The liquid level point interface of flooded evaporator is communicated with the import of heat exchanger, and the high-pressure mouth of injector, exhaust outlet and ejecting port are communicated with the exhaust outlet of economizer, the air entry of compressor, the outlet of heat exchanger respectively.
Be communicated with evaporation oil-out choke valve between the liquid level point interface of described flooded evaporator and the import of heat exchanger; Be communicated with the economizer choke valve between the inlet of described condenser and economizer; Be communicated with the two-step throttle valve between the leakage fluid dram of described economizer and the import of flooded evaporator.
Described economizer selects for use flash tank economizer or plate to change economizer.
Described two-step throttle valve is selected heating power expansion valve or electric expansion valve for use.
The heat medium of described heat exchanger is the liquid refrigerants between chilled water, condenser and the evaporimeter, or other temperature is higher than the medium of refrigerant saturation temperature under the injector air entry pressure.
The utility model is provided with economizer; The refrigerant steam of the intermediate pressure that produces sucks the refrigeration oil that stockpiles in the evaporimeter liquid level place air entry of injector through heat exchanger heating back through injector; Be delivered to the compressor air suction mouth then together; Thereby realize that refrigeration oil gets back to compressor smoothly from evaporimeter, avoid compressor to lose the fault of oil, than existing full-liquid type refrigeration unit generally adopt to pass through the oil return of compressor air-discharging injection more energy-conservation, efficient.Simultaneously, adopt before the injector air entry degree of superheat of refrigerant to control refrigeration major loop two-step throttle valve opening, therefore can use heating power expansion valve to replace electric expansion valve, better effects if not only, and can reduce the cost of full-liquid type unit greatly.
The advantage of the utility model:
What (1), be used to flash-pot is set up heat exchanger on the injection loop; Utilize the refrigerant degree of superheat thereafter; The choke valve of control major loop, effect are superior to the used return-air degree of superheat control of present full-liquid type unit control liquid level electric expansion valve, and cost is lower, effect is more reliable;
(2), through the oil return of economizer exhaust injection, not only improved refrigerating efficiency, realize the oil return of big flow injection simultaneously, add that economizer also can strengthen oil return, effect obviously is superior to compressor air-discharging injection oil return commonly used at present;
(3), the utility model is simple in structure, cost is low, efficient, reliable, practical value is high, can make the full-liquid type refrigeration unit more ripe, is the social saves valuable energy.
Description of drawings
Fig. 1 is the systematic schematic diagram of the utility model.
The specific embodiment
See Fig. 1, a kind of tank level control system of full-liquid type refrigeration unit comprises flooded evaporator 1, compressor 2, condenser 3, economizer 5, injector 6 and heat exchanger 8; The gas outlet 1b of flooded evaporator 1 is communicated with the air entry of compressor 2; The gas outlet of compressor 2 is communicated with the air inlet of condenser 3; The liquid outlet of condenser 3 is communicated with the inlet 5a of economizer 5 through economizer choke valve 4; The leakage fluid dram 5b of economizer 5 is communicated with the import 1a of flooded evaporator 1 through two-step throttle valve 7; The liquid level point interface 1c of flooded evaporator 1 is communicated with the import of evaporation oil-out choke valve 9; The outlet of evaporation oil-out choke valve 9 is communicated with the import of heat exchanger 8, and the high-pressure mouth 6a of injector 6, exhaust outlet 6b and ejecting port 6c are communicated with the exhaust outlet 5c of economizer 5, the air entry of compressor 2, the outlet of heat exchanger 8 respectively, and the pressure nozzle 7a of two-step throttle valve 7 and bulb 7b institute connecting line are between the ejecting port 6c and heat exchanger 8 of injector 6.Wherein, economizer is selected flash tank economizer or heat exchange type economizer for use, and the two-step throttle valve is selected heating power expansion valve or electric expansion valve for use.
The use principle of the utility model:
Flooded evaporator 1 evaporation refrigerant; Gaseous coolant after the evaporation directly gets into compressor 2 from compressor 2 air entries; The liquid refrigerants of evaporation does not get into heating in the heat exchanger 8 through evaporation oil-out choke valve 9 fully, becomes gaseous coolant, the aperture of its degree of superheat control two-step throttle valve 7; Injector 6 utilizes the intermediate pressure of economizer 5 and the pressure differential between the heat exchanger 8 heating evaporation pressure, draws the gaseous coolant after heat exchanger 8 is handled from injector air entry 6c; The economizer 5 partially stabilized subcooled liquids that get off directly get into flooded evaporator 1 refrigeration, and the gaseous coolant of the uncooled gaseous coolant of another part after heat exchanger is handled gets into compressor 2 continuation compressions in the economizer 5.
Claims (4)
1. the tank level control system of a full-liquid type refrigeration unit is characterized in that: comprise flooded evaporator, compressor, condenser, economizer, injector and heat exchanger; Described flooded evaporator, compressor, condenser are communicated with successively; The liquid outlet of condenser is communicated with the inlet of economizer; The leakage fluid dram of economizer is communicated with the import of flooded evaporator; The liquid level point interface of flooded evaporator is communicated with the import of heat exchanger, and the high-pressure mouth of injector, exhaust outlet and ejecting port are communicated with the exhaust outlet of economizer, the air entry of compressor, the outlet of heat exchanger respectively.
2. the tank level control system of full-liquid type refrigeration unit according to claim 1 is characterized in that: be communicated with evaporation oil-out choke valve between the liquid level point interface of described flooded evaporator and the import of heat exchanger; Be communicated with the economizer choke valve between the inlet of described condenser and economizer; Be communicated with the two-step throttle valve between the leakage fluid dram of described economizer and the import of flooded evaporator.
3. the tank level control system of full-liquid type refrigeration unit according to claim 1 is characterized in that: described economizer selects for use flash tank economizer or plate to change economizer.
4. the tank level control system of full-liquid type refrigeration unit according to claim 2 is characterized in that: described two-step throttle valve is selected heating power expansion valve or electric expansion valve for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120198454U CN202133170U (en) | 2011-06-14 | 2011-06-14 | Liquid level control system of flooded refrigerating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120198454U CN202133170U (en) | 2011-06-14 | 2011-06-14 | Liquid level control system of flooded refrigerating unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202133170U true CN202133170U (en) | 2012-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120198454U Expired - Fee Related CN202133170U (en) | 2011-06-14 | 2011-06-14 | Liquid level control system of flooded refrigerating unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN202133170U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105180541A (en) * | 2015-10-14 | 2015-12-23 | 珠海格力电器股份有限公司 | Injection oil return control method and device for air-conditioning system and air-conditioning system |
| CN105444450A (en) * | 2014-07-04 | 2016-03-30 | 约克广州空调冷冻设备有限公司 | Refrigeration device |
| CN105841127A (en) * | 2016-04-08 | 2016-08-10 | 无锡雪浪环境科技股份有限公司 | Device and method for improving steam quality |
| CN113007913A (en) * | 2019-12-20 | 2021-06-22 | 青岛海尔空调电子有限公司 | Water chilling unit and control method thereof |
-
2011
- 2011-06-14 CN CN201120198454U patent/CN202133170U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105444450A (en) * | 2014-07-04 | 2016-03-30 | 约克广州空调冷冻设备有限公司 | Refrigeration device |
| CN105180541A (en) * | 2015-10-14 | 2015-12-23 | 珠海格力电器股份有限公司 | Injection oil return control method and device for air-conditioning system and air-conditioning system |
| CN105841127A (en) * | 2016-04-08 | 2016-08-10 | 无锡雪浪环境科技股份有限公司 | Device and method for improving steam quality |
| CN113007913A (en) * | 2019-12-20 | 2021-06-22 | 青岛海尔空调电子有限公司 | Water chilling unit and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120201 Termination date: 20150614 |
|
| EXPY | Termination of patent right or utility model |