CN102767890B - Hydraulic filling type central air-conditioning unit - Google Patents
Hydraulic filling type central air-conditioning unit Download PDFInfo
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- CN102767890B CN102767890B CN201210285153.6A CN201210285153A CN102767890B CN 102767890 B CN102767890 B CN 102767890B CN 201210285153 A CN201210285153 A CN 201210285153A CN 102767890 B CN102767890 B CN 102767890B
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- evaporimeter
- central air
- compressor
- evaporator
- condenser
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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
Abstract
The invention discloses a hydraulic filling type central air-conditioning unit and belongs to the technical field of central air-conditioning. The hydraulic filling type central air-conditioning unit comprises a compressor, a condenser, an expansion valve, an evaporator and a control unit for controlling a machine unit to run and further comprises a bypass pipe enabling a high-pressure refrigerant in the condenser to be led into the evaporator. The bypass pipe is provided with a solenoid valve controlling on-off of the bypass pipe, the evaporator is provided with a temperature sensor for detecting outflow water temperature, and the temperature sensor and the solenoid valve are electrically connected with the control unit. When the temperature of outflow water of the evaporator is larger than a set value, the compressor and the expansion valve are turned off, the high-pressure refrigerant is led into the evaporator by opening the bypass pipe, evaporating temperature of the refrigerant is improved, the speed of lowering the water temperature is slowed down, water in the evaporator is kept flowing continuously, the compressor and the expansion valve are restarted until the water in the evaporator reaches a certain temperature, and accordingly freezing of the evaporator is avoided.
Description
Technical field
The present invention relates to central air conditioning technical group field, particularly relate to a kind of full-liquid type Central air-conditioning unit.
Background technology
Full-liquid type Central air-conditioning unit belongs to vapour compression-type air conditioner group, generally include hydraulic filling type water-cooling Central air-conditioning unit and full-liquid type ground-source heat pump central air-conditioning unit two kinds, large owing to having single unit refrigeration (heat) amount, unit eer high, current application is between floors more, but there is the problem of evaporator freeze in the application of full-liquid type central air-conditioning, evaporimeter is used to the parts carrying out heat exchange, heat exchanger tube is provided with in evaporimeter, evaporimeter by heat exchange between flowing water and the cold-producing medium of flowing, the heat of water is passed to cold-producing medium, the temperature of water is declined, evaporimeter is caused to freeze, especially full-liquid type ground-source heat pump central air-conditioning unit is in the winter time under heating condition, the temperature of working environment own is lower, and during refrigerant vapor in evaporimeter, absorb the heat of water in evaporimeter, evaporimeter is made to be easier to freeze, the consequence that evaporator freeze causes is very serious, light then shorten unit service life, heavy then cause unit to lose using function thoroughly scrapping.
The means to prevent freezing of current evaporimeter detects evaporator outlet water temperature when unit normally runs, if water temperature is lower than setting value, and compressor emergency shutdown; When leaving water temperature gos up to setting value, unit could be started shooting again, but there is following shortcoming in this method: 1, in actual motion, although unit is shut down but the cold-producing medium in evaporimeter still evaporates, water in evaporimeter still continues cooling, the local that especially water flow velocity is slower, evaporimeter Nei Shui side or still have the danger freezed when water temperature is lower, solves the problem freezed in evaporimeter water route when the method cannot thoroughly normally be run; 2, full-liquid type central air conditioning group system is when unexpected power down, and water pump is out of service, and water base in evaporimeter stops flowing, and evaporimeter inner refrigerant continues evaporation, and water side constant temperature reduces, and unit is very easy to occur evaporator freeze.
Summary of the invention
Technical problem to be solved by this invention is: the full-liquid type Central air-conditioning unit providing a kind of good freezing protection effect.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of full-liquid type Central air-conditioning unit, comprise compressor, condenser, expansion valve, the control unit of evaporimeter and control unit operation, the outlet of described compressor connects the refrigerant inlet of described condenser, the refrigerant outlet of described condenser connects the import of described expansion valve, the outlet of described expansion valve connects the refrigerant inlet of described evaporimeter, the refrigerant outlet of described evaporimeter connects the import of described compressor, also comprise the bypass line high-pressure refrigerant in condenser being passed into evaporimeter, described bypass line is provided with the magnetic valve controlling bypass line break-make, described evaporimeter is provided with the temperature sensor detecting coolant-temperature gage, described temperature sensor and magnetic valve are all electrically connected on control unit.
As a kind of preferred version, one end of described bypass line is connected on the pipeline between the outlet of described compressor and condenser refrigerant import, and the other end is connected on the pipeline between the import of described compressor and evaporator refrigerant outlet.
Improve as one, described evaporimeter is provided with the heater controlled by described control unit.
As a kind of preferred version, described heater comprises electric heater for the water heating in evaporimeter and the electrical storage device of powering for electric heater.
As a kind of preferred version, described electric heater is the annular electro heater being installed on evaporimeter periphery.
As a kind of preferred version, described electric heater is the bar shaped electric heater be installed in evaporimeter.
Owing to have employed technique scheme, when unit normally runs, magnetic valve is in closed condition, the high-pressure refrigerant that compressor produces does not enter evaporimeter by bypass line, when the temperature of the water outlet of temperature sensor sensing evaporator is lower than certain setting value, control unit controls compressor shutdown, and magnetic valve is opened, therefore the cold-producing medium of high pressure enters evaporimeter by bypass line, pressure increase in evaporimeter, improve the boiling point of the cold-producing medium in evaporimeter, slow down the evaporation endothermic of cold-producing medium, slow down the decrease speed of water temperature in evaporimeter, and the water in evaporimeter continues the temperature that flowing improves water in evaporimeter, when temperature sensor detects temperature higher than setting value, compressor is reworked, thus effectively prevent evaporimeter and operationally freeze, and when unit has a power failure, magnetic valve also can open the decrease speed slowing down water temperature, and owing to entering the new boil down to high pressure of weight of compressor after the refrigerant vapor heat absorption in evaporimeter, air pressure under evaporimeter normal operating condition in evaporimeter is very low, therefore the import of compressor and the pressure reduction of outlet very large, and this bypass line is when compressor shutdown, the high-pressure refrigerant at compressor outlet place is imported in evaporimeter, balance the gaseous pressure of compressor outlet and import, make compressor start moment of torsion less, starting current is less, the next time being easy to unit starts, and optimizes the running status of unit.
Because described bypass line one end is connected on the pipeline between the outlet of described compressor and condenser refrigerant import, the other end is connected on the pipeline between the import of described compressor and evaporator refrigerant outlet, bypass line is connected with these two pipelines respectively make to manufacture and use all more convenient.
Because described evaporimeter is provided with the heater controlled by the energising of unit or off-position, when unit has a power failure, heater work, be evaporimeter heating, the water freezing of the device that avoids evaporating, the device that avoids evaporating freezes.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention one;
Fig. 2 is the structural representation of the embodiment of the present invention two;
In figure: 1-compressor; 2-magnetic valve; 3-bypass line; 4-condenser; 5-expansion valve; 6-evaporimeter; 7-annular electro heater; 8-electrical storage device; 9-bar shaped electric heater.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described.
Embodiment one:
As shown in Figure 1, a kind of full-liquid type Central air-conditioning unit, comprise compressor 1, condenser 4, expansion valve 5, the control unit of evaporimeter 6 and control unit operation, the outlet of described compressor 1 connects the refrigerant inlet of described condenser 4, the refrigerant outlet of described condenser 4 connects the import of described expansion valve 5, the outlet of described expansion valve 5 connects the refrigerant inlet of described evaporimeter 6, the refrigerant outlet of described evaporimeter 6 connects the import of described compressor 1, also comprise the bypass line 3 high-pressure refrigerant in condenser 4 being passed into evaporimeter 6, one end of described bypass line 3 is connected on the pipeline between the outlet of described compressor 1 and condenser 4 refrigerant inlet, the other end is connected on the pipeline between the import of described compressor 1 and evaporimeter 6 refrigerant outlet, described bypass line 3 is provided with the magnetic valve 2 controlling bypass line 3 break-make, described evaporimeter 6 is provided with the temperature sensor detecting coolant-temperature gage, described temperature sensor and magnetic valve 2 are all electrically connected on control unit,
In order to carry out anti-frost protection to the evaporimeter 6 under power-off condition, described evaporimeter 6 is provided with the heater controlled by described control unit, when unit runs in the energized state, heater does not work, when unit is in power-off, it is that evaporimeter 6 heats that control unit controls heater work, the water freezing avoided evaporating in device 6, described heater comprises electric heater for the water heating in evaporimeter 6 and the electrical storage device 8 of powering for electric heater, described electrical storage device 8 adopts ups power supply usually, ups power supply is connected with described control unit, described electric heater is the annular electro heater 7 being installed on evaporimeter 6 periphery, electric heater transfers heat to water by the shell transmission of evaporimeter 6.
At unit when normally working, magnetic valve 2 on bypass line 3 cuts out, bypass line 3 is closed, cold-producing medium is at compressor 1, condenser 4, recycle between expansion valve 5 and evaporimeter 6, if temperature sensor detects that evaporimeter 6 leaving water temperature is lower than setting value, then compressor 1 is shut down, expansion valve 5 cuts out, magnetic valve 2 on bypass line 3 is opened, high-pressure refrigerant in condenser 4 enters in evaporimeter 6 by bypass line 3, pressure increase in evaporimeter 6, evaporating temperature rises, slow down the evaporation of evaporimeter 6 inner refrigerant, and the water in evaporimeter 6 continues flowing, thoroughly solve the antifreeze problem of evaporimeter 6, and the gaseous pressure that comparatively fasterly can realize compressor 1 import and outlet that arranges of bypass line 3 balances, unit is when opening next time, the starting torque of compressor 1 is less, starting current is less, the next time being easy to unit starts, optimize the running status of unit,
When unit is in the unexpected power down of whole machine room, compressor 1 quits work, expansion valve 5 also cuts out under self-powered driving, magnetic valve 2 on bypass line 3 is opened due to power down, high-pressure refrigerant in condenser 4 enters in evaporimeter 6 by bypass line 3, pressure increase in evaporimeter 6, evaporating temperature raises, and the evaporation rate of evaporimeter 6 inner refrigerant slows down; Machine room power down, water pump quits work, and the water in evaporimeter 6 stops flowing, and now heater is started working, and annular electro heater 7 heats for evaporimeter 6, and keep the water temperature in evaporimeter 6, the device 6 that avoids evaporating freezes.
Embodiment two:
As shown in Figure 2, embodiment two is compared with embodiment one, and its difference is not use annular electro heater but adopts the bar shaped electric heater 9 be installed in evaporimeter 6, and bar shaped electric heater 9 directly contacts with the water in evaporimeter 6 and heats.
Claims (6)
1. full-liquid type Central air-conditioning unit, comprise compressor, condenser, expansion valve, the control unit of evaporimeter and control unit operation, the outlet of described compressor connects the refrigerant inlet of described condenser, the refrigerant outlet of described condenser connects the import of described expansion valve, the outlet of described expansion valve connects the refrigerant inlet of described evaporimeter, the refrigerant outlet of described evaporimeter connects the import of described compressor, it is characterized in that: also comprise the bypass line high-pressure refrigerant in condenser being passed into evaporimeter, described bypass line is provided with the magnetic valve controlling bypass line break-make, described evaporimeter is provided with the temperature sensor detecting coolant-temperature gage, described temperature sensor and magnetic valve are all electrically connected on control unit.
2. full-liquid type Central air-conditioning unit as claimed in claim 1, it is characterized in that: one end of described bypass line is connected on the pipeline between the outlet of described compressor and condenser refrigerant import, the other end is connected on the pipeline between the import of described compressor and evaporator refrigerant outlet.
3. full-liquid type Central air-conditioning unit as claimed in claim 1 or 2, is characterized in that: described evaporimeter is provided with the heater controlled by described control unit.
4. full-liquid type Central air-conditioning unit as claimed in claim 3, is characterized in that: described heater comprises for the electric heater of the water heating in evaporimeter and the electrical storage device of powering for electric heater.
5. full-liquid type Central air-conditioning unit as claimed in claim 4, is characterized in that: described electric heater is the annular electro heater being installed on evaporimeter periphery.
6. full-liquid type Central air-conditioning unit as claimed in claim 4, is characterized in that: described electric heater is the bar shaped electric heater be installed in evaporimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210285153.6A CN102767890B (en) | 2012-08-11 | 2012-08-11 | Hydraulic filling type central air-conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210285153.6A CN102767890B (en) | 2012-08-11 | 2012-08-11 | Hydraulic filling type central air-conditioning unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102767890A CN102767890A (en) | 2012-11-07 |
| CN102767890B true CN102767890B (en) | 2015-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210285153.6A Active CN102767890B (en) | 2012-08-11 | 2012-08-11 | Hydraulic filling type central air-conditioning unit |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141999B (en) * | 2013-05-06 | 2016-12-28 | 重庆美的通用制冷设备有限公司 | A kind of control device of the electric expansion valve for air-conditioner |
| CN104566809B (en) * | 2014-12-22 | 2018-04-13 | 珠海格力电器股份有限公司 | The control method of air-conditioning and air-conditioning |
| CN109612142A (en) * | 2018-12-20 | 2019-04-12 | 江阴爱尔姆真空设备有限公司 | A kind of flooded screw unit |
| CN111750486B (en) * | 2020-06-17 | 2022-07-19 | 宁波奥克斯电气股份有限公司 | Control method and device for preventing indoor unit from freezing and air conditioner |
| CN114353277B (en) * | 2021-11-30 | 2023-04-21 | 珠海格力电器股份有限公司 | Anti-frosting control method and anti-frosting air conditioner |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201025421Y (en) * | 2007-01-16 | 2008-02-20 | 台湾美威国际事业有限公司 | Thermal pump bypass defrosting device |
| CN201327258Y (en) * | 2008-11-07 | 2009-10-14 | 山东奇威特人工环境有限公司 | Device capable of improving defrosting speed of air conditioning unit |
| CN202041032U (en) * | 2011-04-02 | 2011-11-16 | 北京凯运通科技发展有限公司 | Liquid refrigerant conveying device of air conditioning system |
| CN102384552A (en) * | 2011-11-07 | 2012-03-21 | 北京德能恒信科技有限公司 | Heat pipe and heat pump air conditioner |
| CN202757232U (en) * | 2012-08-11 | 2013-02-27 | 山东雅士股份有限公司 | Full liquid type central air-conditioning unit |
-
2012
- 2012-08-11 CN CN201210285153.6A patent/CN102767890B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201025421Y (en) * | 2007-01-16 | 2008-02-20 | 台湾美威国际事业有限公司 | Thermal pump bypass defrosting device |
| CN201327258Y (en) * | 2008-11-07 | 2009-10-14 | 山东奇威特人工环境有限公司 | Device capable of improving defrosting speed of air conditioning unit |
| CN202041032U (en) * | 2011-04-02 | 2011-11-16 | 北京凯运通科技发展有限公司 | Liquid refrigerant conveying device of air conditioning system |
| CN102384552A (en) * | 2011-11-07 | 2012-03-21 | 北京德能恒信科技有限公司 | Heat pipe and heat pump air conditioner |
| CN202757232U (en) * | 2012-08-11 | 2013-02-27 | 山东雅士股份有限公司 | Full liquid type central air-conditioning unit |
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| Publication number | Publication date |
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| CN102767890A (en) | 2012-11-07 |
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Effective date of registration: 20160226 Address after: 528451 Guangdong province Zhongshan Nanlang Town Industrial Park, the first time the Tashan Road No. 5 Patentee after: Guangdong Yashi Electrical Appliance Co. Ltd. Address before: High tech Zone Taoyuan Street 261062 Shandong city of Weifang province No. 7898 Patentee before: Shandong Yashi Co., Ltd. |