CN102435026A - Auxiliary device of multi-connected air conditioner heat pump system - Google Patents
Auxiliary device of multi-connected air conditioner heat pump system Download PDFInfo
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- CN102435026A CN102435026A CN2011103550724A CN201110355072A CN102435026A CN 102435026 A CN102435026 A CN 102435026A CN 2011103550724 A CN2011103550724 A CN 2011103550724A CN 201110355072 A CN201110355072 A CN 201110355072A CN 102435026 A CN102435026 A CN 102435026A
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Abstract
The invention discloses an auxiliary device of a multi-connected air conditioner heat pump system. The auxiliary device comprises a compressor, a four-way valve, a condenser, a main electronic expansion valve and a high-pressure tank, wherein the compressor, the four-way valve, the condenser, the main electronic expansion valve and the high-pressure tank are connected in turn. The auxiliary device is characterized by further comprising a first electromagnetic valve, a second electromagnetic valve, a first one-way valve and a second one-way valve, wherein the first electromagnetic valve is connected in series with the first one-way valve; the second one-way valve is connected in series with the second electromagnetic valve; the two series-connected pipelines are connected in parallel and are respectively connected at the two ends of the condenser, wherein the first electromagnetic valve and the second one-way valve are communicated with a pipeline between the four-way valve and the condenser; and the first one-way valve and the second electromagnetic valve are communicated with a pipeline between the condenser and the main electronic expansion valve. The auxiliary device can ensure that the system has normal differential pressure, the compressor does not start and stop frequently and lubrication oils can return to an oil groove of the compressor smoothly under the working conditions of small load and small cold; simultaneously, the auxiliary device can ensure that the system can operate in an appropriate pressure range under the working conditions of small load and large heat, so that the multi-connected system can operate in a safe and reliable manner under the two working conditions.
Description
Technical field
The present invention is a kind of servicing unit 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; An interface that is boost electromagnetic valve is connected between compressor and the cross valve, and another interface is connected on the pipeline between main electric expansion valve and the pressure pan; 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 all very harsh for the safe operation of multi-gang air-conditioner heat pump.At present, still do not have and to guarantee the system of 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 a kind of servicing unit that can 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 is provided.
Technical solution of the present invention is: a kind of servicing unit 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 first magnetic valve, second magnetic valve, first check valve and second check valve; Wherein first magnetic valve and first check valve series connection, second check valve and second magnetic valve are connected, and are attempted by the two ends of condenser after the two series pipe parallel connections again; Pipeline connection between first magnetic valve and second check valve and cross valve and the condenser wherein, the pipeline connection between first check valve and second magnetic valve and condenser and the main electric expansion valve.
Above-mentioned first magnetic valve and second magnetic valve are the single-pass magnetic valve.
Above-mentioned heat exchanger is air-cooled or water cooling heat exchanger.
Above-mentioned compressor is the separate unit frequency-changeable compressor.
Above-mentioned compressor is frequency conversion and constant speed parallel connection compressor.
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;
Fig. 2 is multi-gang air-conditioner heat pump figure of the present invention.
The specific 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 first 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; 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, and is as shown in Figure 2; The present invention is on the basis of above-mentioned prior art multi-gang air-conditioner heat pump; Set up servicing unit, it comprises first magnetic valve 11, second magnetic valve 12, first check valve 13 and second check valve 14, wherein first magnetic valve 11 and 13 series connection of first check valve; Second check valve 14 and 12 series connection of second magnetic valve; Be attempted by the two ends of condenser 3 after the two series pipe parallel connections again, pipeline connection between first magnetic valve 11 and second check valve 14 and cross valve 2 and the condenser 3 wherein, the pipeline connection between first check valve 13 and second magnetic valve 12 and condenser 3 and the main electric expansion valve 4.
In the present embodiment, above-mentioned first magnetic valve 11 and second magnetic valve 12 are the single-pass magnetic valve.Above-mentioned heat exchanger 3 is air-cooled or water cooling heat exchanger.Above-mentioned compressor 1 is the separate unit frequency-changeable compressor or is the parallelly connected compressor of frequency conversion and constant speed.
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; When system height pressure reduction during, immediately first magnetic valve 11 is opened, before gaseous coolant bypass to the pressure pan 5 that compressor is discharged less than 1.0MPa; Condensation effect with 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.In process of refrigerastion, second check valve 14 can play and block flowing of place pipeline refrigerant, does not receive impacting with high pressure with second magnetic valve 12 of protecting its downstream, prolongs its service life.
Under little load, big thermal condition; When system high pressure surpasses 3.5MPa; Immediately second magnetic valve 12 is opened, 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, guarantee safety, the reliability service of multi-gang air-conditioner heat pump.In the process of heating, first check valve 13 can play and block flowing of place pipeline refrigerant, does not receive impacting with high pressure with the single-pass magnetic valve 11 of protecting its downstream, prolongs its service life.
Air conditioner heat pump system of the present invention is 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, has improved multi-gang air-conditioner heat pump reliability of operation greatly.
Claims (5)
1. the servicing unit of a 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 first magnetic valve (11), second magnetic valve (12), first check valve (13) and second check valve (14); Wherein first magnetic valve (11) and first check valve (13) series connection; Second check valve (14) and second magnetic valve (12) series connection; Be attempted by the two ends of condenser (3) after the two series pipe parallel connections again, pipeline connection between first magnetic valve (11) and second check valve (14) and cross valve (2) and the condenser (3) wherein, the pipeline connection between first check valve (13) and second magnetic valve (12) and condenser (3) and the main electric expansion valve (4).
2. the servicing unit of multi-gang air-conditioner heat pump according to claim 1 is characterized in that above-mentioned first magnetic valve (11) and second magnetic valve (12) are the single-pass magnetic valve.
3. the servicing unit of multi-gang air-conditioner heat pump according to claim 1 is characterized in that above-mentioned heat exchanger (3) is air-cooled or water cooling heat exchanger.
4. according to the servicing unit of 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 the servicing unit of 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 and constant speed parallel connection compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110355072.4A CN102435026B (en) | 2011-11-11 | 2011-11-11 | A kind of auxiliary device of multi-gang air-conditioner heat pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110355072.4A CN102435026B (en) | 2011-11-11 | 2011-11-11 | A kind of auxiliary device of multi-gang air-conditioner heat pump |
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| CN102435026A true CN102435026A (en) | 2012-05-02 |
| CN102435026B CN102435026B (en) | 2016-08-03 |
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| CN201110355072.4A Active CN102435026B (en) | 2011-11-11 | 2011-11-11 | A kind of auxiliary device of multi-gang air-conditioner heat pump |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759147A (en) * | 2012-07-02 | 2012-10-31 | 广东美的电器股份有限公司 | Air-conditioning multiple on-line system |
| CN103776191A (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 and heat pump system thereof |
| WO2024131049A1 (en) * | 2022-12-21 | 2024-06-27 | 珠海格力电器股份有限公司 | Multi-split control method and apparatus, multi-split system and storage medium |
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2011
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| JPH11248261A (en) * | 1998-02-25 | 1999-09-14 | Tabai Espec Corp | Compressor refrigerant supplementation refrigerating machine |
| JP2004251555A (en) * | 2003-02-20 | 2004-09-09 | Matsushita Electric Ind Co Ltd | Air-conditioning system |
| CN200972229Y (en) * | 2006-10-11 | 2007-11-07 | 钟志良 | Two-purpose machine of air-conditioning and water heating |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759147A (en) * | 2012-07-02 | 2012-10-31 | 广东美的电器股份有限公司 | Air-conditioning multiple on-line system |
| CN102759147B (en) * | 2012-07-02 | 2014-07-16 | 美的集团股份有限公司 | Air-conditioning multiple on-line system |
| CN103776191A (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 and heat pump system thereof |
| WO2024131049A1 (en) * | 2022-12-21 | 2024-06-27 | 珠海格力电器股份有限公司 | Multi-split control method and apparatus, multi-split system and storage medium |
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| CN102435026B (en) | 2016-08-03 |
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Owner name: MIDEA GROUP CO., LTD. Free format text: FORMER OWNER: MEIDI ELECTRIC APPLIANCES CO., LTD., GUANGDONG Effective date: 20131129 |
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Effective date of registration: 20131129 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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