CN103375935A - Two-stage compression circulation system and control method for air conditioner with same - Google Patents

Two-stage compression circulation system and control method for air conditioner with same Download PDF

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Publication number
CN103375935A
CN103375935A CN2012101252890A CN201210125289A CN103375935A CN 103375935 A CN103375935 A CN 103375935A CN 2012101252890 A CN2012101252890 A CN 2012101252890A CN 201210125289 A CN201210125289 A CN 201210125289A CN 103375935 A CN103375935 A CN 103375935A
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compressor
air
heat exchanger
control method
stage compression
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CN103375935B (en
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王春
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Abstract

The invention provides a two-stage compression circulation system and a control method for an air conditioner with the same. The two-stage compression circulation system comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger and further comprises a flash evaporator and an electromagnetic valve. An air supplementing port is arranged in the compressor, the indoor heat exchanger is communicated with the compressor, the outdoor heat exchanger is communicated with the compressor, the flash evaporator is communicated with the outdoor heat exchanger and the indoor heat exchanger, and the electromagnetic valve is communicated with the air supplementing port of the compressor and an air outlet of the flash evaporator. The control method for the air conditioner includes that the air conditioner comprises the two-stage compression circulation system, and air is supplemented to the compressor when the following conditions are met simultaneously. The conditions are that the operation frequency of the compressor is F, the switching frequency of the compressor is f, and F>=f; in a refrigeration mode, outdoor environment temperature is T1, switching temperature is T, and T1>=T; or in a heating mode, the outdoor environment temperature is T2, the switching temperature is T, and T2<=T; startup operation time is t, and the operation time reaches t when the air conditioner is started up.

Description

The two-stage compression circulatory system and have the control method of its air-conditioner
Technical field
The present invention relates to the compressor control field, especially, relate to a kind of two-stage compression circulatory system and have the control method of its air-conditioner.
Background technology
The vast heating districts such as China Huanghe valley, North China, in the winter of cold, because pressure ratio is large, refrigerant flow is low, and the heating capacity of traditional air-cooled heat pump unit is significantly decayed, and can't satisfy the requirement of heat supply heating, also can't reliability service.Traditional air cool heat pump air conditioning system generally can only use under the environment more than-5 ℃.Need a kind of heating performance that had both improved system of exploitation, can improve again the energy-conservation comfortable small rotor compression air-cooled heat pump unit of the refrigeration performance of system.
Summary of the invention
The object of the invention is to provide a kind of two-stage compression circulatory system and has the control method of its air-conditioner, to solve air-conditioner in use efficient and the energy-conservation technical problem that can not take into account.
For achieving the above object, the invention provides a kind of two-stage compression circulatory system, comprise compressor, be provided with gas supplementing opening on the compressor; Indoor heat exchanger is connected with compressor; Outdoor heat exchanger is connected with compressor; Also comprise: flash vessel is connected with outdoor heat exchanger and indoor heat exchanger respectively; Magnetic valve is connected with the gas supplementing opening of compressor and the gas outlet of flash vessel respectively.
Further, the internal diameter of the path of magnetic valve is d, 1mm≤d≤3mm.
Further, also comprise the control module that the control magnetic valve opens and closes, control module is electrically connected with magnetic valve.
Further, be provided with the first throttle valve between flash vessel and the outdoor heat exchanger, be provided with the second choke valve between flash vessel and the indoor heat exchanger.
The present invention also provides a kind of control method of air-conditioner, and air-conditioner comprises the aforesaid two-stage compression circulatory system, and when satisfying following condition simultaneously, give the compressor tonifying Qi: the operating frequency of compressor is F, and the switching frequency of compressor is f, F 〉=f; Under the refrigeration mode, outdoor environment temperature is T1, and switching temperature is T, T1 〉=T; Or under the heating mode, outdoor environment temperature is T2, switching temperature T, T2≤T; Boot running time is t, and reach t running time after the start of air-conditioner.
Further, control module control magnetic valve is opened to compressor tonifying Qi or control closed electromagnetic valve and is stopped to the compressor tonifying Qi.
Further, heat under the defrost pattern, shut electromagnetic valve stops to the compressor tonifying Qi.
Further, under the dehumidification mode, shut electromagnetic valve stops to the compressor tonifying Qi.
Further, switching frequency is f, 20Hz≤f≤40Hz.
Further, under the refrigeration mode, switching temperature is T, 20 ℃≤T≤25 ℃.
Further, under the heating mode, switching temperature is T, 10 ℃≤T≤15 ℃.
Further, boot running time is t, 8s≤t≤15s.
The present invention has following beneficial effect:
The present invention has improved the operating efficiency of the two-stage compression circulatory system, energy savings by the switch of solenoid control compressor tonifying Qi is set.Control method is controlled air-conditioner according to conditions such as compressor operating, outdoor environment temperature, boot running time take energy-conservation and efficient as target, guarantees secondary circulation reliability service, makes system not only energy-conservation but also improved operating efficiency.
Except purpose described above, feature and advantage, the present invention also has other purpose, feature and advantage.The below is with reference to figure, and the present invention is further detailed explanation.
Description of drawings
The accompanying drawing that consists of the application's a part is used to provide a further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram according to the two-stage compression circulatory system of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Referring to Fig. 1, according to the two-stage compression circulatory system of the present invention, comprising: compressor 1 is provided with gas supplementing opening on the compressor 1; Indoor heat exchanger 3 is connected with compressor 1; Outdoor heat exchanger 4 is connected with compressor 1; Also comprise: flash vessel 5 is connected with outdoor heat exchanger 3 and indoor heat exchanger 4 respectively; Magnetic valve 8 is connected with the gas supplementing opening of compressor 1 and the gas outlet of flash vessel 5 respectively.Cross valve 2 is connected with outdoor heat exchanger 3 and indoor heat exchanger respectively, and cross valve 2 also is connected with compressor 1.By the switch of solenoid control compressor tonifying Qi is set, improved the operating efficiency of the two-stage compression circulatory system, energy savings.
Referring to Fig. 1, the internal diameter of the path of magnetic valve 8 is d, 1mm≤d≤3mm.Internal diameter in this scope has certain capillary throttle effect, can form height pressure reduction, stops the phenomenon that occurs in the gas with liquid during tonifying Qi.
Referring to Fig. 1, also comprise the control module that control magnetic valve 8 opens and closes, control module is electrically connected with magnetic valve 8.By the power on/off of magnetic valve 8, and then the switch of realization control tonifying Qi process, simple.
Referring to Fig. 1, be provided with first throttle valve 7a between flash vessel 5 and the outdoor heat exchanger 3, be provided with the second choke valve 7b between flash vessel 5 and the indoor heat exchanger 4.
According to the control method of air-conditioner of the present invention, air-conditioner comprises the aforesaid two-stage compression circulatory system, and when satisfying following condition simultaneously, give compressor 1 tonifying Qi: the operating frequency of compressor 1 is F, and the switching frequency of compressor 1 is f, F 〉=f; Under the refrigeration mode, outdoor environment temperature is T1, and switching temperature is T, T1 〉=T; Or under the heating mode, outdoor environment temperature is T2, switching temperature T, T2≤T; Boot running time is t, and reach t running time after the start of air-conditioner.
Control module control magnetic valve 8 opens to cut out to compressor 1 tonifying Qi or control magnetic valve 8 and stops to compressor 1 tonifying Qi.Realize by magnetic valve 8 energising cut-off switch controls, be simple and easy to realize.Open during magnetic valve 8 energising, make solenoid (circle often bursts at the seams) energising, the beginning tonifying Qi; Close during outage, the solenoid outage stops tonifying Qi.
Heat under the defrost pattern, shut electromagnetic valve 8 stops to compressor 1 tonifying Qi.Heating defrost process actual is with the cryogenic refrigeration operation, then needs to close the reliability that tonifying Qi guarantees whole compressibility.
Under the dehumidification mode, shut electromagnetic valve 8 stops to compressor 1 tonifying Qi.The running frequency that dehumidifies in addition is lower, also can not obviously increase latent heat even open tonifying Qi, improves moisture removal, and the efficient of namely opening tonifying Qi is low, so do not need to open tonifying Qi.
Switching frequency is f, 20Hz≤f≤40Hz.When compressor frequency then disconnects tonifying Qi during less than switching frequency, when being higher than under the switching frequency condition, then opening tonifying Qi and improve cooling or heating effect.When compressor frequency is higher than switching frequency, illustrate that compressor can not reach desired effects, open tonifying Qi this moment, improve compressor efficiency, to reach desired effects, switching frequency generally is arranged between the 20-40Hz according to different situations.
Under the refrigeration mode, switching temperature T, 20 ℃≤T≤25 ℃.Under the heating mode, switching temperature T, 10 ℃≤T≤15 ℃.
Boot running time is t, 8s≤t≤15s.In order to guarantee the whole system security of operation, after start is stable, carry out again the switching of tonifying Qi process, therefore need to open again tonifying Qi behind the start operation certain hour, generally setting boot running time is 8-15s.
As can be seen from the above description, the above embodiments of the present invention have realized following technique effect:
The present invention has improved the operating efficiency of the two-stage compression circulatory system, energy savings by the switch of solenoid control compressor tonifying Qi is set.Control method is take energy-conservation and efficient as target, control according to compressor operating, outdoor environment temperature, boot running time etc., guarantee secondary circulation reliability service, and with converter technique and secondary circulation combination, improved the level of comfort of convertible frequency air-conditioner, widened the use range of operation of convertible frequency air-conditioner, the range of operation under the low temperature condition especially, the energy conservation characteristic of simultaneously optimization and improvement convertible frequency air-conditioner.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (12)

1. two-stage compression circulatory system comprises:
Compressor (1), described compressor is provided with gas supplementing opening on (1);
Indoor heat exchanger (4) is connected with described compressor (1);
Outdoor heat exchanger (3) is connected with described compressor (1);
It is characterized in that, also comprise:
Flash vessel (5) is connected with described outdoor heat exchanger (3) and described indoor heat exchanger (4) respectively;
Magnetic valve (8) is connected with the gas supplementing opening of described compressor (1) and the gas outlet of described flash vessel (5) respectively.
2. the two-stage compression circulatory system according to claim 1 is characterized in that, the internal diameter of the path of described magnetic valve (8) is d, 1mm≤d≤3mm.
3. the two-stage compression circulatory system according to claim 1 is characterized in that, also comprises the control module that control magnetic valve (8) opens and closes, and described control module is electrically connected with described magnetic valve (8).
4. the two-stage compression circulatory system according to claim 3, it is characterized in that, be provided with first throttle valve (7a) between described flash vessel (5) and the described outdoor heat exchanger (3), be provided with the second choke valve (7b) between described flash vessel (5) and the described indoor heat exchanger (4).
5. the control method of an air-conditioner, described air-conditioner comprises each described two-stage compression circulatory system in the claim 1 to 4, it is characterized in that,
When satisfying following condition simultaneously, give described compressor (1) tonifying Qi:
The operating frequency of described compressor (1) is F, and the switching frequency of described compressor (1) is f, F 〉=f;
Under the refrigeration mode, outdoor environment temperature is T1, and switching temperature is T, T1 〉=T; Or under the heating mode, outdoor environment temperature is T2, switching temperature T, T2≤T;
Boot running time is t, and reach t running time after the start of described air-conditioner.
6. the control method of air-conditioner according to claim 5, it is characterized in that control module is controlled described magnetic valve (8) and opened to (1) tonifying Qi of described compressor or control described magnetic valve (8) and close and stop to described compressor (1) tonifying Qi.
7. the control method of air-conditioner according to claim 6 is characterized in that, heats under the defrost pattern, closes described magnetic valve (8), stops to described compressor (1) tonifying Qi.
8. the control method of air-conditioner according to claim 6 is characterized in that, under the dehumidification mode, closes described magnetic valve (8), stops to described compressor (1) tonifying Qi.
9. the control method of air-conditioner according to claim 5 is characterized in that, described switching frequency is f, 20Hz≤f≤40Hz.
10. the control method of air-conditioner according to claim 5 is characterized in that, under the refrigeration mode, described switching temperature is T, 20 ℃≤T≤25 ℃.
11. the control method of air-conditioner according to claim 5 is characterized in that, under the heating mode, described switching temperature is T, 10 ℃≤T≤15 ℃.
12. the control method of air-conditioner according to claim 5 is characterized in that, described boot running time is t, 8s≤t≤15s.
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104110908A (en) * 2014-07-03 2014-10-22 珠海格力电器股份有限公司 Three-stage compression cascade circulation heat pump system and control method thereof
CN104456840A (en) * 2014-11-13 2015-03-25 广东美的制冷设备有限公司 Enhanced vapor injection air conditioner and control method thereof
CN104596166A (en) * 2013-10-31 2015-05-06 海尔集团公司 Air conditioner and air supplying and enthalpy adding method thereof
CN105091405A (en) * 2015-07-22 2015-11-25 珠海格力电器股份有限公司 Air conditioning unit and method for increasing intake capacity of air conditioning unit
CN106196482A (en) * 2016-07-28 2016-12-07 广东美芝制冷设备有限公司 The control method of air conditioning system
CN109539623A (en) * 2018-11-28 2019-03-29 珠海格力电器股份有限公司 Air-conditioning system and its Gas-supplying enthalpy-increasing control method
CN109945440A (en) * 2019-03-29 2019-06-28 海信(山东)空调有限公司 The heat-production control method and Gas-supplying enthalpy-increasing system of Gas-supplying enthalpy-increasing system
CN109990429A (en) * 2019-03-15 2019-07-09 奥克斯空调股份有限公司 A kind of air conditioner defrosting control method and air conditioner
CN110234938A (en) * 2017-02-01 2019-09-13 Lg电子株式会社 The outdoor system of air conditioner
CN111156651A (en) * 2020-01-14 2020-05-15 珠海格力电器股份有限公司 Gulp valve control method, compressor, air conditioner, memory and controller
CN111306731A (en) * 2020-03-03 2020-06-19 珠海格力电器股份有限公司 Air conditioner electromagnetic valve control method, device and equipment, electromagnetic valve system and air conditioner
US10941955B2 (en) 2017-10-27 2021-03-09 Dometic Sweden Ab Systems, methods, and apparatuses for providing communications between climate control devices in a recreational vehicle
US11254183B2 (en) 2017-08-25 2022-02-22 Dometic Sweden Ab Recreational vehicle, cooling device, controlling system and method for controlling the cooling device

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4896515A (en) * 1986-03-25 1990-01-30 Mitsui Engineering & Shipbuilding Co. Heat pump, energy recovery method and method of curtailing power for driving compressor in the heat pump
JPH0311268A (en) * 1989-05-19 1991-01-18 Carrier Corp Cooling device for motor
CN101018994A (en) * 2004-05-28 2007-08-15 约克国际公司 System and method for controlling an economizer circuit
CN101512255A (en) * 2006-09-29 2009-08-19 开利公司 Refrigerant vapor compression system with flash tank receiver
CN201440018U (en) * 2009-09-16 2010-04-21 珠海格力电器股份有限公司 Flash evaporator and enthalpy jet system using same
CN201488273U (en) * 2009-07-27 2010-05-26 广东长菱空调冷气机制造有限公司 Air source heat pump water heater
CN201876021U (en) * 2010-08-04 2011-06-22 珠海格力节能环保制冷技术研究中心有限公司 Flash evaporator and heat pump system employing the same
CN201963552U (en) * 2011-03-23 2011-09-07 珠海格力节能环保制冷技术研究中心有限公司 Rotary compressor
US20120006048A1 (en) * 2005-08-22 2012-01-12 Emerson Climate Technologies, Inc. Compressor with vapor injection system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4896515A (en) * 1986-03-25 1990-01-30 Mitsui Engineering & Shipbuilding Co. Heat pump, energy recovery method and method of curtailing power for driving compressor in the heat pump
JPH0311268A (en) * 1989-05-19 1991-01-18 Carrier Corp Cooling device for motor
CN101018994A (en) * 2004-05-28 2007-08-15 约克国际公司 System and method for controlling an economizer circuit
US20120006048A1 (en) * 2005-08-22 2012-01-12 Emerson Climate Technologies, Inc. Compressor with vapor injection system
CN101512255A (en) * 2006-09-29 2009-08-19 开利公司 Refrigerant vapor compression system with flash tank receiver
CN201488273U (en) * 2009-07-27 2010-05-26 广东长菱空调冷气机制造有限公司 Air source heat pump water heater
CN201440018U (en) * 2009-09-16 2010-04-21 珠海格力电器股份有限公司 Flash evaporator and enthalpy jet system using same
CN201876021U (en) * 2010-08-04 2011-06-22 珠海格力节能环保制冷技术研究中心有限公司 Flash evaporator and heat pump system employing the same
CN201963552U (en) * 2011-03-23 2011-09-07 珠海格力节能环保制冷技术研究中心有限公司 Rotary compressor

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104596166A (en) * 2013-10-31 2015-05-06 海尔集团公司 Air conditioner and air supplying and enthalpy adding method thereof
CN104110908A (en) * 2014-07-03 2014-10-22 珠海格力电器股份有限公司 Three-stage compression cascade circulation heat pump system and control method thereof
CN104110908B (en) * 2014-07-03 2016-08-31 珠海格力电器股份有限公司 Three stage compression autocascade cycle heat pump and control method thereof
CN104456840B (en) * 2014-11-13 2017-06-13 广东美的制冷设备有限公司 Air injection enthalpy-increasing type air-conditioning and its control method
CN104456840A (en) * 2014-11-13 2015-03-25 广东美的制冷设备有限公司 Enhanced vapor injection air conditioner and control method thereof
CN105091405A (en) * 2015-07-22 2015-11-25 珠海格力电器股份有限公司 Air conditioning unit and method for increasing intake capacity of air conditioning unit
CN106196482A (en) * 2016-07-28 2016-12-07 广东美芝制冷设备有限公司 The control method of air conditioning system
CN106196482B (en) * 2016-07-28 2019-02-15 广东美芝制冷设备有限公司 The control method of air-conditioning system
US11300337B2 (en) 2017-02-01 2022-04-12 Lg Electronics Inc. Outdoor system for air conditioner
CN110234938A (en) * 2017-02-01 2019-09-13 Lg电子株式会社 The outdoor system of air conditioner
US11919363B2 (en) 2017-08-25 2024-03-05 Dometic Sweden Ab Recreational vehicle, cooling device, controlling system and method for controlling the cooling device
US11254183B2 (en) 2017-08-25 2022-02-22 Dometic Sweden Ab Recreational vehicle, cooling device, controlling system and method for controlling the cooling device
US10941955B2 (en) 2017-10-27 2021-03-09 Dometic Sweden Ab Systems, methods, and apparatuses for providing communications between climate control devices in a recreational vehicle
CN109539623A (en) * 2018-11-28 2019-03-29 珠海格力电器股份有限公司 Air-conditioning system and its Gas-supplying enthalpy-increasing control method
CN109990429A (en) * 2019-03-15 2019-07-09 奥克斯空调股份有限公司 A kind of air conditioner defrosting control method and air conditioner
CN109945440A (en) * 2019-03-29 2019-06-28 海信(山东)空调有限公司 The heat-production control method and Gas-supplying enthalpy-increasing system of Gas-supplying enthalpy-increasing system
CN111156651A (en) * 2020-01-14 2020-05-15 珠海格力电器股份有限公司 Gulp valve control method, compressor, air conditioner, memory and controller
CN111306731A (en) * 2020-03-03 2020-06-19 珠海格力电器股份有限公司 Air conditioner electromagnetic valve control method, device and equipment, electromagnetic valve system and air conditioner
CN111306731B (en) * 2020-03-03 2021-03-23 珠海格力电器股份有限公司 Air conditioner electromagnetic valve control method, device and equipment, electromagnetic valve system and air conditioner

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