CN102506480A - Air-conditioning heat pump system of multi-split air conditioner - Google Patents
Air-conditioning heat pump system of multi-split air conditioner Download PDFInfo
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- CN102506480A CN102506480A CN2011103550739A CN201110355073A CN102506480A CN 102506480 A CN102506480 A CN 102506480A CN 2011103550739 A CN2011103550739 A CN 2011103550739A CN 201110355073 A CN201110355073 A CN 201110355073A CN 102506480 A CN102506480 A CN 102506480A
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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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Abstract
The invention provides an air-conditioning heat pump system of a multi-split air conditioner. The air-conditioning heat pump system comprises a compressor, a four-way valve, a condenser, a main electronic expansion valve and a high pressure tank which are connected in sequence, and is characterized by further comprising an auxiliary expansion valve, wherein one interface of the auxiliary expansion valve is connected to a pipeline between the four-way valve and the condenser, and the other interface of the auxiliary expansion valve is connected to a pipeline between the condenser and the main electronic expansion valve. The air-conditioning heat pump system has the advantages that the system can be guaranteed to have a normal temperature difference under the working conditions of small load and slight cold, the compressor cannot to be started and stopped frequently and lubricating oil can smoothly return to an oil groove of the compressor; and meanwhile, the system is guaranteed to run within a suitable pressure range under the conditions of small load and great heat, so that the multi-split air conditioner system can run safely and reliably under both working conditions. The reliability of the air-conditioning heat pump system of the multi-split air conditioner is greatly improved on the condition that the cost of the air-conditioning heat pump system is seldom increased.
Description
Technical field
The present invention is a kind of multi-gang air-conditioner heat pump, belongs to the improvement technology of multi-gang air-conditioner heat pump.
Background technology
Existing multi-gang air-conditioner heat pump is under little load, little cold operating mode, because the system condensing effect is good especially, condensing pressure is very low; Compressor output is relatively large, and system's evaporating pressure is low, can cause the frequent low-temperature protection of multi-gang air-conditioner heat pump; The start-stop of high frequent is simultaneously because system's height pressure reduction is less, after lubricating oil is compressed a large amount of discharges of machine; Can't return smoothly, finally can make the compressor oil starvation and damage; And under little load, big thermal condition, because system's evaporation effect is good, evaporating pressure is very high, and compressor output is relatively large, causes condensing pressure very high, often exceeds the safe operation scope of compressor.
At present; For solve the multi-gang air-conditioner heat pump under little load, little cold operating mode Installed System Memory in problems such as low pressure differential, oil return difficulties; Part enterprise adopts and sets up boost electromagnetic valve; Be that an interface of boost electromagnetic valve is connected between compressor 1 and the cross valve 2 on the pipeline, another interface is connected on the pipeline between main electric expansion valve 4 and the pressure pan 5; And under little load, big thermal condition, then take to close outer blower fan to weaken evaporation, the high and low pressure of reduction system for air-cooled type; For the water-cooled unit, owing to can't reduce system pressure through regulating discharge, thereby can only stoppage protection when system pressure is too high.
Above-mentioned two kinds of operating modes are very harsh for the safe operation of multi-gang air-conditioner heat pump.At present, still there is not a kind of system that can guarantee the multi-gang air-conditioner heat pump simultaneously at above-mentioned two kinds of working condition safeties, reliability service.
Summary of the invention
The objective of the invention is to consider the problems referred to above and provide and to guarantee at little load, little cold operating mode and multi-gang air-conditioner heat pump that simultaneously can safe and reliable operation under little load, big two kinds of operating modes of thermal condition.
Technical scheme of the present invention is: a kind of multi-gang air-conditioner heat pump; Comprise compressor, cross valve, condenser, main electric expansion valve and pressure pan; Wherein compressor, cross valve, condenser, main electric expansion valve and pressure pan connect successively; It is characterized in that also comprising auxiliary expansion valve, an interface of auxiliary expansion valve and be connected cross valve and condenser between pipeline on, another interface is connected on the pipeline between condenser and the main electric expansion valve.
Above-mentioned auxiliary expansion valve is an electric expansion valve.
Heat exchanger in the above-mentioned air conditioner heat pump system is air-cooled or water cooling heat exchanger.
Above-mentioned compressor is the separate unit frequency-changeable compressor.
Above-mentioned compressor is the frequency-changeable compressor of parallel connection more than two.
Above-mentioned compressor is frequency conversion, the constant speed compressor of parallel connection more than two.
The present invention can guarantee that system has normal pressure reduction under little load, little cold operating mode, and compressor can frequent start-stop, and lubricating oil can return the compressor oil groove smoothly; Guarantee also that simultaneously system can operate in suitable pressure limit under little load, big thermal condition, thereby can make many on-line systems can safe and reliable operation under two kinds of operating modes.Air conditioner heat pump system of the present invention improves the reliability of multi-gang air-conditioner heat pump greatly under cost increase condition seldom.
Description of drawings
Fig. 1 is conventional multi-gang air-conditioner heat pump figure;
The multi-gang air-conditioner heat pump figure that Fig. 2 proposes for the present invention.
The specific embodiment
Embodiment:
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
As shown in Figure 1, the multi-gang air-conditioner heat pump of prior art comprises compressor 1, cross valve 2; Condenser 3, main electric expansion valve 4, pressure pan 5; First inboard electric expansion valve 6, second inboard electric expansion valve 7, the first inboard heat exchanger 8, the second inboard heat exchanger 9 and the low-pressure liquid storing tanks 10.Wherein first interface of cross valve 2 is connected with the refrigerant exit of compressor 1; Second interface of cross valve 2 is connected with the refrigerant of condenser 3 inlet; The refrigerant exit of condenser 3 is connected with the inlet of electric expansion valve 4; The refrigerant inlet of the outlet of electric expansion valve 4 and pressure pan 5 is connected, pressure pan 5 refrigerant exit be connected with the 3rd interface of cross valve 2, the first inboard electric expansion valve 6 and the first inboard heat exchanger 8 are connected in series; The second inboard electric expansion valve 7 and second inboard heat exchanger 9 serial connections; Two serial connection pipelines be attempted by pressure pan 5 the 3rd interface of refrigerant exit and cross valve 2 between pipeline on, the 4th interface of cross valve 2 is connected with low-pressure liquid storing tank 10, low-pressure liquid storing tank 10 enters the mouth with the refrigerant of compressor 1 and is connected.
For guaranteeing that system has normal pressure reduction under little load, little cold operating mode; Compressor can frequent start-stop, and lubricating oil can return the compressor oil groove smoothly, guarantees that simultaneously system can operate in suitable pressure limit under little load, big thermal condition; As shown in Figure 2; The present invention has set up servicing unit on the basis of above-mentioned prior art multi-gang air-conditioner heat pump, servicing unit is auxiliary expansion valve 11; One interface of auxiliary expansion valve 11 is connected on the pipeline between cross valve 2 and the condenser 3, and another interface is connected on the pipeline between condenser 3 and the main electric expansion valve 4.
In the present embodiment, above-mentioned auxiliary expansion valve 11 is an electric expansion valve.Heat exchanger 3 in the above-mentioned air conditioner heat pump system is air-cooled or water cooling heat exchanger.Above-mentioned compressor 1 is the separate unit frequency-changeable compressor, frequency conversion, the constant speed compressor of the frequency-changeable compressor of parallel connection more than two or parallel connection more than two.
The control principle of multi-gang air-conditioner heat pump servicing unit of the present invention is following:
Under little load, little cold operating mode; Height pressure reduction will assist expansion valve 11 to be opened into suitable aperture less than 1.0MPa immediately when system; The gaseous coolant bypass that compressor is discharged to pressure pan, with the condensation effect of attenuation systems, the high and low pressure of elevator system; Assurance system height pressure reduction, the system that makes can safety under this operating mode, reliability service.
Under little load, big thermal condition;, system high pressure will assist expansion valve 11 to be opened into suitable aperture immediately when surpassing 3.5MPa; Gas-liquid two-phase refrigerant bypass that will be through main electric expansion valve 4 is to low pressure jar 10; The evaporability of attenuation systems to reduce the high and low pressure of system, guarantees safety, the reliability service of multi-gang air-conditioner heat pump.
Use air conditioner heat pump system of the present invention under cost increase condition seldom; Satisfying the multi-gang air-conditioner heat pump simultaneously can reduce system pressure at little load, little cold operating mode increase system pressure and little load, big thermal condition, improves the reliability of multi-gang air-conditioner heat pump greatly.
Claims (6)
1. multi-gang air-conditioner heat pump; Comprise compressor (1), cross valve (2), condenser (3), main electric expansion valve (4) and pressure pan (5); Wherein compressor (1), cross valve (2), condenser (3), main electric expansion valve (4) and pressure pan (5) connect successively; It is characterized in that also comprising auxiliary expansion valve (11); One interface of auxiliary expansion valve (11) and be connected cross valve (2) and condenser (3) between pipeline on, another interface is connected on the pipeline between condenser (3) and the main electric expansion valve (4).
2. multi-gang air-conditioner heat pump according to claim 1 is characterized in that above-mentioned auxiliary expansion valve (11) is an electric expansion valve.
3. multi-gang air-conditioner heat pump according to claim 1 is characterized in that the heat exchanger (3) in the above-mentioned air conditioner heat pump system is air-cooled or water cooling heat exchanger.
4. according to each described multi-gang air-conditioner heat pump of claim 1 to 3, it is characterized in that above-mentioned compressor (1) is the separate unit frequency-changeable compressor.
5. according to each described multi-gang air-conditioner heat pump of claim 1 to 3, it is characterized in that above-mentioned compressor (1) is the frequency-changeable compressor of parallel connection more than two.
6. according to each described multi-gang air-conditioner heat pump of claim 1 to 3, it is characterized in that above-mentioned compressor (1) is frequency conversion, the constant speed compressor of parallel connection more than two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103550739A CN102506480A (en) | 2011-11-11 | 2011-11-11 | Air-conditioning heat pump system of multi-split air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103550739A CN102506480A (en) | 2011-11-11 | 2011-11-11 | Air-conditioning heat pump system of multi-split air conditioner |
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| CN102506480A true CN102506480A (en) | 2012-06-20 |
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| CN2011103550739A Pending CN102506480A (en) | 2011-11-11 | 2011-11-11 | Air-conditioning heat pump system of multi-split air conditioner |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776119A (en) * | 2014-02-21 | 2014-05-07 | 广东志高暖通设备股份有限公司 | Multi-split air conditioner heat pump system, refrigeration control method thereof and heating control method thereof |
| CN109028413A (en) * | 2018-08-23 | 2018-12-18 | 广东申菱环境系统股份有限公司 | A kind of integrated multiple unit of combination multi-source and its control method |
| CN109915952A (en) * | 2019-02-25 | 2019-06-21 | 珠海格力电器股份有限公司 | Unit is adjusted with 0 ~ 100% output load regulating power center air |
| CN110044021A (en) * | 2019-04-22 | 2019-07-23 | 宁波奥克斯电气股份有限公司 | Improve control method, device and the air conditioner of air conditioning comfortableness |
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| CN102121741A (en) * | 2011-03-14 | 2011-07-13 | 广东美的电器股份有限公司 | Multi-connection air conditioning unit and control method thereof during small-load refrigeration running |
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2011
- 2011-11-11 CN CN2011103550739A patent/CN102506480A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH02233953A (en) * | 1989-03-06 | 1990-09-17 | Hoshizaki Electric Co Ltd | Freezing cycle of ice making machine |
| JPH0979701A (en) * | 1995-09-19 | 1997-03-28 | Sanyo Electric Co Ltd | Air conditioner |
| JP2004020086A (en) * | 2002-06-18 | 2004-01-22 | Matsushita Electric Ind Co Ltd | Dehumidifying drying air conditioner |
| DE10350192A1 (en) * | 2002-10-30 | 2004-05-19 | Denso Corp., Kariya | Cooling circuit system for a motor vehicle's air conditioning has a first heat exchange section to condense a gaseous coolant, a gas/liquid separating device and a second heat exchange section |
| JP2004177064A (en) * | 2002-11-29 | 2004-06-24 | Hitachi Home & Life Solutions Inc | Air conditioner |
| JP2005076983A (en) * | 2003-09-01 | 2005-03-24 | Mitsubishi Electric Corp | Air conditioning system |
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| JP2005300157A (en) * | 2005-07-08 | 2005-10-27 | Mitsubishi Electric Corp | Air conditioner |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776119A (en) * | 2014-02-21 | 2014-05-07 | 广东志高暖通设备股份有限公司 | Multi-split air conditioner heat pump system, refrigeration control method thereof and heating control method thereof |
| CN109028413A (en) * | 2018-08-23 | 2018-12-18 | 广东申菱环境系统股份有限公司 | A kind of integrated multiple unit of combination multi-source and its control method |
| CN109028413B (en) * | 2018-08-23 | 2023-07-18 | 广东申菱环境系统股份有限公司 | Combined multisource integrated multi-connected unit and control method thereof |
| CN109915952A (en) * | 2019-02-25 | 2019-06-21 | 珠海格力电器股份有限公司 | Unit is adjusted with 0 ~ 100% output load regulating power center air |
| CN110044021A (en) * | 2019-04-22 | 2019-07-23 | 宁波奥克斯电气股份有限公司 | Improve control method, device and the air conditioner of air conditioning comfortableness |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| ASS | Succession or assignment of patent right |
Owner name: MIDEA GROUP CO., LTD. Free format text: FORMER OWNER: MEIDI ELECTRIC APPLIANCES CO., LTD., GUANGDONG Effective date: 20131202 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20131202 Address after: 528311 Guangdong, Foshan, Beijiao, the United States, the United States and the United States on the avenue of the United States, the headquarters of the United States building B floor, District, 26-28 Applicant after: Midea Group Co., Ltd. Address before: 528311 Beijiao, Foshan, Shunde District, the town of Guangdong, the United States Avenue, No. 6 Applicant before: Meidi Electric Appliances Co., Ltd., Guangdong |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120620 |