CN201355152Y - Water-source variable-refrigerant-volume refrigeration system with subcooler control loop - Google Patents
Water-source variable-refrigerant-volume refrigeration system with subcooler control loop Download PDFInfo
- Publication number
- CN201355152Y CN201355152Y CNU2008201750433U CN200820175043U CN201355152Y CN 201355152 Y CN201355152 Y CN 201355152Y CN U2008201750433 U CNU2008201750433 U CN U2008201750433U CN 200820175043 U CN200820175043 U CN 200820175043U CN 201355152 Y CN201355152 Y CN 201355152Y
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- expansion valve
- subcooler
- compressor
- electronic expansion
- indoor
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Abstract
The utility model discloses a water-source variable-refrigerant-volume refrigeration system with a subcooler control loop, which belongs to the field of air conditioners. The refrigeration system comprises a compressor, a gas-liquid separator, an outdoor-side heat exchanger, a main electronic expansion valve, indoor electronic expansion valves and indoor-side heat exchangers; wherein, a subcooler is arranged between the main electronic expansion valve and the indoor electronic expansion valves; an auxiliary electronic expansion valve is arranged in parallel between the subcooler and the main electronic expansion valve; and the subcooler and the gas-liquid separator are communicated with each other through a conduit. The utility model can ensure the safe operation of the compressor and the oil return of the system.
Description
Technical field
The utility model relates to a kind of air-conditioning equipment, the multi-joint machine cooling system in specifically a kind of water source.
Background technology
The multi-joint machine cooling system in the water source of prior art, when inflow temperature was low when refrigeration, condensing pressure was also lower, and owing to water one fluorine heat exchange, cooled refrigerant temperature can be lower simultaneously.If cooled refrigerant temperature is also lower than environment temperature, the reservoir of back and liquid line thermal insulation are bad, when liquid refrigerant and environment temperature heat-shift, can cause the cold-producing medium degree of supercooling to reduce or loss, cause refrigerating capacity to descend, and influence oil return safety.And in heating operation, if when evaporating pressure is too high, compressor can cause bigger wearing and tearing.
Summary of the invention
Task of the present utility model is to provide a kind of water source with the subcooler control loop multi-joint machine cooling system, and it can guarantee the security and the oil return reliably of compressor operating.
Its technical solution is: the multi-joint machine cooling system in water source of band subcooler control loop, comprise compressor, compressor is communicated with cross valve, cross valve is communicated with outdoor heat exchanger, outdoor heat exchanger is connected with each indoor heat exchanger by main electric expansion valve and each indoor electric expansion valve, indoor heat exchanger is connected with gas-liquid separator by cross valve, gas-liquid separator is connected with compressor, between main electric expansion valve and indoor electric expansion valve, be provided with subcooler, be arranged in parallel the auxiliary electron expansion valve between subcooler and the main electric expansion valve, subcooler and gas-liquid separator pass through pipeline connection.
The beneficial effects of the utility model are: effect one: when refrigeration, when the surrounding enviroment temperature of unit operation higher, and the cooling water temperature that enters unit cooling is when low, aperture by control auxiliary electron expansion valve, the employing cold-producing medium cools off the cold-producing medium on the main fluorine pipeline, increases the degree of supercooling of the cold-producing medium on the main fluorine pipeline.Effect two: when heating, when the evaporating pressure of unit is too high, control evaporating pressure, ensured the exhaust degree of superheat and the delivery temperature of compressor, guaranteed compressor operating security and oil return.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Describe below in conjunction with 1 pair of the utility model of accompanying drawing:
The specific embodiment
The multi-joint machine cooling system in a kind of water source described in the utility model with the subcooler control loop, comprise frequency-changeable compressor 1, frequency-changeable compressor 1 is communicated with cross valve 2, cross valve 2 is communicated with outside water one fluorine heat exchanger 3, water one fluorine heat exchanger 3 in outside is connected with each indoor heat exchanger 8 by main electric expansion valve 4 and each indoor electric expansion valve 7, indoor heat exchanger 8 is connected with gas-liquid separator 9 by cross valve 2, and gas-liquid separator 9 is connected with frequency-changeable compressor 1; Be provided with subcooler 6 between main electric expansion valve 4 and indoor electric expansion valve 7, be provided with auxiliary electron expansion valve 5 between subcooler 6 and the main electric expansion valve 4, subcooler 6 passes through pipeline connection with gas-liquid separator 9.
When refrigeration, under the situation of low inflow temperature, water---the fluorine heat exchange, temperature is lower after the refrigerant cools.When liquid refrigerant and environment temperature heat-shift, can cause the cold-producing medium degree of supercooling to reduce or loss, cause that refrigeration is bad or oil return is bad.When heating, if evaporating pressure Ps is when too high (as: Ps surpasses 1.3MPa), compressor can cause bigger wearing and tearing.Therefore as Ps＞1.3MPa, transferring control Ps this moment is target, turns down main electronic expansion valve opening, and the refrigerant amount that therefore flows through outdoor heat exchanger diminishes, and evaporating pressure reduces.But the degree of superheat of cold-producing medium evaporation at this moment can increase, and therefore the aperture of regulating the auxiliary electron expansion valve by the exhaust degree of superheat mode of control compressor is introduced liquid refrigerant and entered the gas-liquid separator mixing, thereby reduces the delivery temperature and the exhaust degree of superheat.As Ps＜1.2MPa, then withdraw from the control target of Ps, entered the main electronic expansion valve controls of thermal control, reach the security that guarantees the compressor operating oil return.
Certainly, protection domain of the present utility model is not limited to the foregoing description, so long as those of ordinary skill in the art is through creatively improving, and just should be within protection domain of the present utility model.
Claims (1)
1, the multi-joint machine cooling system in water source of band subcooler control loop, comprise compressor, compressor is communicated with cross valve, cross valve is communicated with outdoor heat exchanger, outdoor heat exchanger is connected with each indoor heat exchanger by main electric expansion valve and each indoor electric expansion valve, indoor heat exchanger is connected with gas-liquid separator by cross valve, gas-liquid separator is connected with compressor, it is characterized in that: between main electric expansion valve and indoor electric expansion valve, be provided with subcooler, be arranged in parallel the auxiliary electron expansion valve between subcooler and the main electric expansion valve, subcooler and gas-liquid separator pass through pipeline connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201750433U CN201355152Y (en) | 2008-11-12 | 2008-11-12 | Water-source variable-refrigerant-volume refrigeration system with subcooler control loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201750433U CN201355152Y (en) | 2008-11-12 | 2008-11-12 | Water-source variable-refrigerant-volume refrigeration system with subcooler control loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201355152Y true CN201355152Y (en) | 2009-12-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201750433U Expired - Lifetime CN201355152Y (en) | 2008-11-12 | 2008-11-12 | Water-source variable-refrigerant-volume refrigeration system with subcooler control loop |
Country Status (1)
| Country | Link |
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| CN (1) | CN201355152Y (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927651A (en) * | 2011-08-11 | 2013-02-13 | 青岛海信日立空调系统有限公司 | Water temperature self-adaptive water source air conditioning system and control method thereof |
| CN103175344A (en) * | 2013-03-13 | 2013-06-26 | 青岛海信日立空调系统有限公司 | Cold-region used multi-connected heat pump system and control method thereof |
| CN103912928A (en) * | 2014-03-28 | 2014-07-09 | 珠海格力电器股份有限公司 | Temperature control system |
| CN103912930A (en) * | 2014-03-28 | 2014-07-09 | 珠海格力电器股份有限公司 | Temperature control system |
| CN103912929A (en) * | 2014-03-28 | 2014-07-09 | 珠海格力电器股份有限公司 | Temperature control system |
| CN103940024A (en) * | 2013-01-22 | 2014-07-23 | 珠海格力电器股份有限公司 | Air conditioner and control system and control method for exhaust temperature of air conditioner compressor |
| CN105588356A (en) * | 2015-03-31 | 2016-05-18 | 海信（山东）空调有限公司 | Refrigerating system and control method thereof |
| CN105674484A (en) * | 2016-01-20 | 2016-06-15 | 青岛海尔空调电子有限公司 | Control method for heating of water-cooling multiple online machine |
| CN106642858A (en) * | 2017-01-12 | 2017-05-10 | 珠海格力电器股份有限公司 | Multi-split system and liquid drainage control method and device applied to multi-split system |
| CN107401849A (en) * | 2017-08-15 | 2017-11-28 | 广东美的暖通设备有限公司 | Multiple on-line system and its control method and device that loop valve body is subcooled |
| CN107560215A (en) * | 2017-08-15 | 2018-01-09 | 广东美的暖通设备有限公司 | Multiple on-line system and its control method and device that loop valve body is subcooled |
| CN113124541A (en) * | 2021-04-14 | 2021-07-16 | 珠海格力电器股份有限公司 | Method and device for judging reverse connection of expansion valve, controller and air conditioner |
-
2008
- 2008-11-12 CN CNU2008201750433U patent/CN201355152Y/en not_active Expired - Lifetime
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927651A (en) * | 2011-08-11 | 2013-02-13 | 青岛海信日立空调系统有限公司 | Water temperature self-adaptive water source air conditioning system and control method thereof |
| CN103940024A (en) * | 2013-01-22 | 2014-07-23 | 珠海格力电器股份有限公司 | Air conditioner and control system and control method for exhaust temperature of air conditioner compressor |
| CN103940024B (en) * | 2013-01-22 | 2016-06-01 | 珠海格力电器股份有限公司 | Air conditioner and control system and control method for exhaust temperature of air conditioner compressor |
| CN103175344A (en) * | 2013-03-13 | 2013-06-26 | 青岛海信日立空调系统有限公司 | Cold-region used multi-connected heat pump system and control method thereof |
| CN103175344B (en) * | 2013-03-13 | 2015-04-29 | 青岛海信日立空调系统有限公司 | Cold-region used multi-connected heat pump system and control method thereof |
| CN103912929A (en) * | 2014-03-28 | 2014-07-09 | 珠海格力电器股份有限公司 | Temperature control system |
| CN103912930A (en) * | 2014-03-28 | 2014-07-09 | 珠海格力电器股份有限公司 | Temperature control system |
| CN103912928A (en) * | 2014-03-28 | 2014-07-09 | 珠海格力电器股份有限公司 | Temperature control system |
| CN105588356A (en) * | 2015-03-31 | 2016-05-18 | 海信（山东）空调有限公司 | Refrigerating system and control method thereof |
| CN105588356B (en) * | 2015-03-31 | 2018-06-29 | 海信（山东）空调有限公司 | A kind of refrigeration system and its control method |
| CN105674484A (en) * | 2016-01-20 | 2016-06-15 | 青岛海尔空调电子有限公司 | Control method for heating of water-cooling multiple online machine |
| CN106642858A (en) * | 2017-01-12 | 2017-05-10 | 珠海格力电器股份有限公司 | Multi-split system and liquid drainage control method and device applied to multi-split system |
| CN107401849A (en) * | 2017-08-15 | 2017-11-28 | 广东美的暖通设备有限公司 | Multiple on-line system and its control method and device that loop valve body is subcooled |
| CN107560215A (en) * | 2017-08-15 | 2018-01-09 | 广东美的暖通设备有限公司 | Multiple on-line system and its control method and device that loop valve body is subcooled |
| CN107560215B (en) * | 2017-08-15 | 2019-12-03 | 广东美的暖通设备有限公司 | Multi-line system and its control method and device that circuit valve body is subcooled |
| CN107401849B (en) * | 2017-08-15 | 2019-12-27 | 广东美的暖通设备有限公司 | Multi-split air conditioning system and control method and device of supercooling loop valve body thereof |
| CN113124541A (en) * | 2021-04-14 | 2021-07-16 | 珠海格力电器股份有限公司 | Method and device for judging reverse connection of expansion valve, controller and air conditioner |
| CN113124541B (en) * | 2021-04-14 | 2024-01-23 | 珠海格力电器股份有限公司 | Judgment method and device for reverse connection of expansion valve, controller and air conditioner |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091202 |