CN105091392A - Heat recovery multi-online system and control method thereof - Google Patents

Heat recovery multi-online system and control method thereof Download PDF

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Publication number
CN105091392A
CN105091392A CN201410150979.0A CN201410150979A CN105091392A CN 105091392 A CN105091392 A CN 105091392A CN 201410150979 A CN201410150979 A CN 201410150979A CN 105091392 A CN105091392 A CN 105091392A
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China
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pipe
heat
indoor set
pressure air
air pipe
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CN201410150979.0A
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CN105091392B (en
Inventor
代文杰
张仕强
熊建国
余凯
包本勇
李卫国
艾大云
陈敏
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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 relates to a heat recovery multi-online system and a control method thereof. The heat recovery multi-online system comprises a compressor, a four-way valve, an outdoor heat exchanger, a plurality of indoor units, a high-pressure air pipe, a medium-pressure liquid pipe, a low-pressure air pipe, a balance pipe, a first solenoid valve and a second solenoid valve. Two ends of the high-pressure air pipe are respectively connected with the exhaust end of the compressor and the plurality of indoor units. Two ends of the medium-pressure liquid pipe are respectively connected with the outdoor heat exchanger and the plurality of indoor units. Two ends of the low-pressure air pipe are respectively connected with the air suction end of the compressor and the plurality of indoor units. The compressor, the outdoor heat exchanger, and the indoor units form a circulation loop. The first solenoid valve is arranged on the high-pressure air pipe. Two ends of the balance pipe are respectively connected with the middle part of the high-pressure air pipe and the middle part of the low-pressure air pipe. The junction of the balance pipe and the high-pressure air pipe is between the first solenoid valve and the plurality of indoor units. The second solenoid valve is arranged on the balance pipe, so as to achieve an objective of improving refrigeration efficiency.

Description

Heat-reclamation multi-compressors system and control method thereof
Technical field
The present invention relates to field of air conditioning, particularly relate to a kind of heat-reclamation multi-compressors system, and the control method of heat-reclamation multi-compressors system.
Background technology
In prior art, multiple on-line system has efficient energy-saving and is easy to the feature of maintenance, and the height of energy saving also can be reacted by test monitoring data such as EER, IPLV, APF.Heat-reclamation multi-compressors system, as typical multi-connected machine product, has higher efficiency.
Current heat-reclamation multi-compressors system generally all adopts the design of three control, has high-pressure air pipe, middle hydraulic fluid pipe and low pressure gas pipe three circuits in its outer machine system.Common heat pump multi-connected machine system generally has two pipelines: tracheae and liquid pipe.The operation logic of heat-reclamation multi-compressors system is different from common multi-connected heat pump multiple on-line system.
In common multi-connected heat pump multiple on-line system, when running refrigerating pattern, refrigerant flows through liquid pipe and flows to indoor set again and carry out throttling heat exchange after condenser heat exchange, now the refrigerant of liquid pipe is in the state of temperature in high pressure, and tracheae is in the state of low-pressure low-temperature as the refrigerant pipeline after indoor set heat exchange.But when system cloud gray model heating mode, refrigerant directly flows to indoor set from tracheae without heat exchange, and tracheae is now in the state of high pressure-temperature, and liquid pipe is in the state of temperature in middle pressure through indoor set heat exchange.
Under different operational modes, the pipeline state of common heat pump multi-connected machine system is along with the difference of operational mode changes.And the pipeline state of heat-reclamation multi-compressors system is not along with the difference of operational mode changes, heat-reclamation multi-compressors system provides the refrigerant of three kinds of stable states: high pressure, middle pressure and low pressure.Indoor set is according to required operational mode, and by devices such as mode converters, what automatically regulate refrigerant chooses the flow direction, realizes freezing simultaneously and heating two kinds of operational modes.
As from the foregoing, in heat-reclamation multi-compressors system, when operational mode is for freezing completely, the whole running refrigerating pattern of namely all indoor sets, now heat-reclamation multi-compressors system is equal to common heat pump multi-connected machine system substantially, does not need high-pressure air pipe to provide refrigerant to participate in system cloud gray model.
There is situation in what existing heat-reclamation multi-compressors system can not change refrigerant in high-pressure air pipe, high-pressure air pipe exists a large amount of refrigerants can not participate in system cloud gray model effectively, and the efficiency for system has larger impact, even can have influence on refrigeration.
In view of above-mentioned defect, the present inventor obtains the invention finally through long research and practice.
Summary of the invention
Based on this, be necessary to provide a kind of the heat-reclamation multi-compressors system and the control method thereof that improve efficiency, improve the situation that high-pressure air pipe under complete refrigerating state does not participate in freezing rationally and effectively, these are reasonably optimized again to the influential part of refrigeration efficiency.
A kind of heat-reclamation multi-compressors system of the present invention, comprises compressor, cross valve, outdoor heat exchanger, multiple indoor set, high-pressure air pipe, middle hydraulic fluid pipe, low pressure gas pipe, balance pipe, the first magnetic valve and the second magnetic valve;
The two ends of described high-pressure air pipe are connected respectively to the exhaust end of described compressor and multiple described indoor set;
The two ends of described middle hydraulic fluid pipe are connected respectively to described outdoor heat exchanger and multiple described indoor set;
The two ends of described low pressure gas pipe are connected respectively to the suction end of described compressor and multiple described indoor set;
Described compressor, described outdoor heat exchanger and described indoor set form closed circuit;
Described first magnetic valve is arranged on described high-pressure air pipe;
The two ends of described balance pipe are connected respectively to the middle part of described high-pressure air pipe and the middle part of described low pressure gas pipe, and the junction of described balance pipe and described high-pressure air pipe is between described first magnetic valve and multiple described indoor set;
Described second magnetic valve is arranged on described balance pipe.
As a kind of embodiment, described heat-reclamation multi-compressors system also comprises oil eliminator and gas-liquid separator;
Described oil eliminator is arranged on described high-pressure air pipe, and described gas-liquid separator is arranged on described low pressure gas pipe.
As a kind of embodiment, four ports of described cross valve are communicated to the outlet of described oil eliminator, the suction end of described compressor, the import of described gas-liquid separator and described outdoor heat exchanger respectively.
As a kind of embodiment, described heat-reclamation multi-compressors system also comprises high-pressure air pipe stop valve, middle hydraulic fluid pipe stop valve and low pressure gas pipe stop valve;
Described high-pressure air pipe stop valve is arranged on described high-pressure air pipe, and between described first magnetic valve and multiple described indoor set;
Described middle hydraulic fluid pipe stop valve is arranged on described middle hydraulic fluid pipe;
Described low pressure gas pipe stop valve is arranged on described low pressure gas pipe.
As a kind of embodiment, each described indoor set includes communication module, for described off-premises station transmission of information.
As a kind of embodiment, described off-premises station comprises controller, the information that the communication module transmission for the treatment of multiple described indoor set comes.
The control method of a kind of heat-reclamation multi-compressors system of the present invention, realized by described heat-reclamation multi-compressors system, indoor set is started shooting and is selected operational mode, the operational mode that the multiple described indoor set of off-premises station statistics is selected, described off-premises station judges the operational mode of heat-reclamation multi-compressors system according to plug-in;
If the operational mode that all described indoor sets are selected is refrigeration, the operational mode of described heat-reclamation multi-compressors system for freeze completely, the first closed electromagnetic valve, the second magnetic valve unlatching, the high-pressure air pipe being communicated to multiple described indoor set is converted into low-pressure state;
If there is refrigeration and heat two kinds in the operational mode that described indoor set is selected, or operational mode is all when heating, the operational mode of described heat-reclamation multi-compressors system is non-fully refrigeration, first magnetic valve is opened, second closed electromagnetic valve, high-pressure air pipe, middle hydraulic fluid pipe and low pressure gas pipe are respectively high pressure, middle pressure and low-pressure state.
As a kind of embodiment, the operational mode of the multiple described indoor set selection of controller statistics of described off-premises station.
As a kind of embodiment, the operational mode that user selects is delivered to the controller of described off-premises station by the communication module of multiple described indoor set, is judged the operational mode of heat-reclamation multi-compressors system by the main control chip of described controller.
Beneficial effect of the present invention is compared with the prior art: heat-reclamation multi-compressors system is by its control method, when the operational mode of all indoor sets is refrigeration, first closed electromagnetic valve, second magnetic valve is opened, the high-pressure air pipe being communicated to multiple indoor set is converted into low-pressure state, be conducted with low pressure gas pipe, now heat-reclamation multi-compressors system has the pipeline of two low-pressure states simultaneously, improves efficiency during refrigeration.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of heat-reclamation multi-compressors system of the present invention;
Fig. 2 is the schematic flow sheet of the control method of heat-reclamation multi-compressors system of the present invention.
Detailed description of the invention
In order to solve in high-pressure air pipe the problem that there is a large amount of refrigerant, propose a kind of heat-reclamation multi-compressors system and control method realizes higher efficiency.
Below in conjunction with accompanying drawing, to above-mentioned being described in more detail with other technical characteristic and advantage of the present invention.
Refer to shown in Fig. 1, it is the schematic diagram of heat-reclamation multi-compressors system of the present invention, and a kind of heat-reclamation multi-compressors system 100 of the present invention comprises compressor 110, cross valve 130, outdoor heat exchanger 140, multiple indoor set 150, high-pressure air pipe 160, middle hydraulic fluid pipe 170, low pressure gas pipe 180, balance pipe 190, first magnetic valve 162 and the second magnetic valve 192.
The exhaust end of compressor 110 is connected to high-pressure air pipe 160, and its suction end is connected to low pressure gas pipe 180.
The two ends of high-pressure air pipe 160 connect exhaust end and multiple indoor set 150 of compressor 110 respectively; Its one end is connected to the exhaust end of compressor 110, and its other end has multiple branch line, and each branch line is connected respectively to indoor set 150.
The two ends of middle hydraulic fluid pipe 170 are connected respectively to outdoor heat exchanger 140 and multiple indoor set 150; One end that middle hydraulic fluid pipe 170 connects indoor set 150 has multiple branch line, and each branch line is connected respectively to indoor set 150.
More preferably, middle hydraulic fluid pipe 170 arranges electric expansion valve.
The two ends of low pressure gas pipe 180 connect suction end and multiple indoor set 150 of compressor 110 respectively; One end that low pressure gas pipe 180 connects indoor set 150 has multiple branch line, and each branch line is connected respectively to indoor set 150.Compressor 110, outdoor heat exchanger 140 form closed circuit with indoor set 150.
First magnetic valve 162 is arranged on high-pressure air pipe 160.
The two ends of balance pipe 190 are connected respectively to the middle part of high-pressure air pipe 160 and the middle part of low pressure gas pipe 180, and the junction of balance pipe 190 and high-pressure air pipe 160 is between the first magnetic valve 162 and multiple indoor set 150.
More preferably, before balance pipe 190 and the junction of high-pressure air pipe 160, low pressure gas pipe 180 should be in the branch line of high-pressure air pipe 160, low pressure gas pipe 180 respectively, that is, the two ends of balance pipe 190 are connected respectively on the backbone of high-pressure air pipe 160, low pressure gas pipe 180.
Second magnetic valve 192 is arranged on balance pipe 190.
More preferably, the first magnetic valve 162 and the second magnetic valve 192 are big orifice magnetic valve.
When the operational mode of all indoor sets 150 is refrigeration, this operational mode is defined as by heat-reclamation multi-compressors system 100 freezes completely; First magnetic valve 162 and the second magnetic valve 192 interoperation, the first magnetic valve 162 cuts out, and the second magnetic valve 192 is opened.
The high-pressure air pipe 160 being communicated to multiple indoor set 150 is converted into low-pressure state, be conducted with low pressure gas pipe 180, now heat-reclamation multi-compressors system 100 has the pipeline of two low-pressure states simultaneously, the caliber being equivalent to low pressure line increases, the pressure loss also declines relatively, thus improves efficiency when heat-reclamation multi-compressors system 100 is freezed.
When the operational mode of part indoor set 150 is for refrigeration, or the operational mode of indoor set 150 is all when heating, heat-reclamation multi-compressors system 100 operational mode is divided into heat completely, main body refrigeration, main body heats and complete recuperation of heat, above pattern is referred to as non-fully refrigeration; First magnetic valve 162 and the second magnetic valve 192 interoperation, the first magnetic valve 162 is opened, and the second magnetic valve 192 cuts out.
High-pressure air pipe 160 is separate isolated with low pressure gas pipe 180, and heat-reclamation multi-compressors system 100 has stable high pressure refrigerant and low pressure refrigerant, and working cycles is reliable and stable, can complete the recuperation of heat of multi-connected machine.
More preferably, four ports of cross valve 130 respectively by pipeline communication to the suction end of compressor 110 and exhaust end, low pressure gas pipe 180 and outdoor heat exchanger 140.
As a kind of embodiment, heat-reclamation multi-compressors system 100 also comprises oil eliminator 112 and gas-liquid separator 120.
Oil eliminator 112 is arranged on high-pressure air pipe 160, and is connected to the exhaust end of compressor 110.Gas-liquid separator 120 is arranged on described low pressure gas pipe, and is connected to the suction end of compressor 110.
As a kind of embodiment, four ports of cross valve 130 are communicated to the outlet of oil eliminator 112, the suction end of compressor 110, the import of gas-liquid separator 120 and outdoor heat exchanger 140 respectively.
As a kind of embodiment, heat-reclamation multi-compressors system 100 also comprises high-pressure air pipe stop valve 164, middle hydraulic fluid pipe stop valve 174 and low pressure gas pipe stop valve 184.
High-pressure air pipe stop valve 164 is arranged on high-pressure air pipe 160, and between the first magnetic valve 162 and multiple indoor set 150, as shown in Figure 1, before high-pressure air pipe stop valve 164 is placed in the branch line of high-pressure air pipe 160.
Middle hydraulic fluid pipe stop valve 174 is arranged on middle hydraulic fluid pipe 170.More preferably, before middle hydraulic fluid pipe stop valve 174 is placed in the branch line of hydraulic fluid pipe 170.
Low pressure gas pipe stop valve 184 is arranged on low pressure gas pipe 180.More preferably, before low pressure gas pipe stop valve 184 is placed in the branch line of low pressure gas pipe 180.
As a kind of embodiment, each indoor set 150 includes communication module, for off-premises station 140 transmission of information.
As a kind of embodiment, off-premises station 140 comprises controller, the information that the communication module transmission for the treatment of multiple indoor set 150 comes.Off-premises station 140 is judged by controller, determines that the operational mode of heat-reclamation multi-compressors system 100 is that refrigeration or non-fully are freezed completely, thus controls unlatching or the closedown of the first magnetic valve 162 and the second magnetic valve 192.
Preferably, before each indoor set 150, mode converter is set, as shown in frame empty in Fig. 1, user selects the operational mode of each indoor set 150 by the man-machine interface of remote controller, mode converter is operatively connected to the break-make of the branch line of the high-pressure air pipe 160 of each indoor set 150, the branch line of low pressure gas pipe 180, thus realizes operational modes such as freezing or heat.
Refer to shown in Fig. 2, it is the schematic flow sheet of heat-reclamation multi-compressors system control method of the present invention, a kind of heat-reclamation multi-compressors system control method of the present invention, realized by above-mentioned heat-reclamation multi-compressors system 100, multiple indoor set 150 is started shooting respectively and selects operational mode, off-premises station 140 adds up the operational mode that multiple indoor set 150 is selected, and off-premises station 140 judges the operational mode of heat-reclamation multi-compressors system 100 according to plug-in.
If the operational mode that all indoor sets 150 are selected is refrigeration, the operational mode of heat-reclamation multi-compressors system 100 is for freeze completely; First magnetic valve 162 cuts out, and the second magnetic valve 192 is opened.
The high-pressure air pipe 160 being communicated to multiple indoor set 150 is converted into low-pressure state, be conducted with low pressure gas pipe 180, now heat-reclamation multi-compressors system 100 has the pipeline of two low-pressure states simultaneously, the caliber being equivalent to low pressure line increases, the pressure loss also declines relatively, thus efficiency when improve cooling system.
If the operational mode that indoor set 150 is selected exists refrigeration and heats two kinds, or the operational mode of indoor set 150 is all when heating, and the operational mode of heat-reclamation multi-compressors system 100 is non-fully refrigeration; First magnetic valve 162 is opened, and the second magnetic valve 192 cuts out.
High-pressure air pipe 160, middle hydraulic fluid pipe 170 are respectively high pressure, middle pressure and low-pressure state with low pressure gas pipe 180.High-pressure air pipe 160 is separate isolated with low pressure gas pipe 180, and heat-reclamation multi-compressors system 100 has stable high pressure refrigerant and low pressure refrigerant, and working cycles is reliable and stable, can complete the recuperation of heat of multi-connected machine.
As a kind of embodiment, the operational mode of multiple indoor set 150 selection added up by the controller of off-premises station 140.
As a kind of embodiment, the operational mode that user selects is delivered to the controller of off-premises station 140 by the communication module of multiple indoor set 150, is judged the operational mode of heat-reclamation multi-compressors system 100 by the main control chip of controller.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.

Claims (9)

1. a heat-reclamation multi-compressors system, comprises compressor, cross valve, outdoor heat exchanger and multiple indoor set, it is characterized in that, also comprises high-pressure air pipe, middle hydraulic fluid pipe, low pressure gas pipe, balance pipe, the first magnetic valve and the second magnetic valve;
The two ends of described high-pressure air pipe are connected respectively to the exhaust end of described compressor and multiple described indoor set;
The two ends of described middle hydraulic fluid pipe are connected respectively to described outdoor heat exchanger and multiple described indoor set;
The two ends of described low pressure gas pipe are connected respectively to the suction end of described compressor and multiple described indoor set;
Described compressor, described outdoor heat exchanger and described indoor set form closed circuit;
Described first magnetic valve is arranged on described high-pressure air pipe;
The two ends of described balance pipe are connected respectively to the middle part of described high-pressure air pipe and the middle part of described low pressure gas pipe, and the junction of described balance pipe and described high-pressure air pipe is between described first magnetic valve and multiple described indoor set;
Described second magnetic valve is arranged on described balance pipe.
2. heat-reclamation multi-compressors system according to claim 1, is characterized in that, also comprises oil eliminator and gas-liquid separator;
Described oil eliminator is arranged on described high-pressure air pipe, and described gas-liquid separator is arranged on described low pressure gas pipe.
3. heat-reclamation multi-compressors system according to claim 2, is characterized in that, four ports of described cross valve are communicated to the outlet of described oil eliminator, the suction end of described compressor, the import of described gas-liquid separator and described outdoor heat exchanger respectively.
4. heat-reclamation multi-compressors system according to claim 1, is characterized in that, also comprises high-pressure air pipe stop valve, middle hydraulic fluid pipe stop valve and low pressure gas pipe stop valve;
Described high-pressure air pipe stop valve is arranged on described high-pressure air pipe, and between described first magnetic valve and multiple described indoor set;
Described middle hydraulic fluid pipe stop valve is arranged on described middle hydraulic fluid pipe;
Described low pressure gas pipe stop valve is arranged on described low pressure gas pipe.
5. heat-reclamation multi-compressors system according to claim 1, is characterized in that, each described indoor set includes communication module, for described off-premises station transmission of information.
6. heat-reclamation multi-compressors system according to claim 5, is characterized in that, described off-premises station comprises controller, the information that the communication module transmission for the treatment of multiple described indoor set comes.
7. the control method of a heat-reclamation multi-compressors system, realized by the heat-reclamation multi-compressors system described in any one of claim 1 to 6, indoor set is started shooting and is selected operational mode, the operational mode that the multiple described indoor set of off-premises station statistics is selected, it is characterized in that, described off-premises station judges the operational mode of heat-reclamation multi-compressors system according to plug-in;
If the operational mode that all described indoor sets are selected is refrigeration, the operational mode of described heat-reclamation multi-compressors system for freeze completely, the first closed electromagnetic valve, the second magnetic valve unlatching, the high-pressure air pipe being communicated to multiple described indoor set is converted into low-pressure state;
If there is refrigeration and heat two kinds in the operational mode that described indoor set is selected, or operational mode is all when heating, the operational mode of described heat-reclamation multi-compressors system is non-fully refrigeration, first magnetic valve is opened, second closed electromagnetic valve, high-pressure air pipe, middle hydraulic fluid pipe and low pressure gas pipe are respectively high pressure, middle pressure and low-pressure state.
8. the control method of heat-reclamation multi-compressors system according to claim 7, is characterized in that, the operational mode of the multiple described indoor set selection of controller statistics of described off-premises station.
9. the control method of heat-reclamation multi-compressors system according to claim 8, it is characterized in that, the operational mode that user selects is delivered to the controller of described off-premises station by the communication module of multiple described indoor set, is judged the operational mode of heat-reclamation multi-compressors system by the main control chip of described controller.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106152406A (en) * 2016-07-04 2016-11-23 珠海格力电器股份有限公司 A kind of air-conditioning system and the control method of cold and hot pattern switching thereof
CN108731187A (en) * 2018-06-20 2018-11-02 广东美的暖通设备有限公司 Three pipe heat-reclamation multi-compressors systems and its control method
CN109282423A (en) * 2018-09-20 2019-01-29 珠海格力电器股份有限公司 A kind of detection method and heat-reclamation multi-compressors air-conditioning system of heat-reclamation multi-compressors air-conditioning system communication connection mistake
CN113874662A (en) * 2019-05-23 2021-12-31 Lg电子株式会社 Air conditioner

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CN102109203A (en) * 2011-03-15 2011-06-29 广东美的电器股份有限公司 Water source heat pump three-tube type heat recovery multi-online air conditioning system
CN203908095U (en) * 2014-04-15 2014-10-29 珠海格力电器股份有限公司 Heat recovery variable refrigerant volume (VRV) system

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CN2591494Y (en) * 2002-06-29 2003-12-10 海尔集团公司 Heat recovery device for multiple-air conditioner system
CN101131266A (en) * 2006-08-22 2008-02-27 珠海格力电器股份有限公司 Heat-reclamation multi-compressors
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106152406A (en) * 2016-07-04 2016-11-23 珠海格力电器股份有限公司 A kind of air-conditioning system and the control method of cold and hot pattern switching thereof
CN108731187A (en) * 2018-06-20 2018-11-02 广东美的暖通设备有限公司 Three pipe heat-reclamation multi-compressors systems and its control method
CN109282423A (en) * 2018-09-20 2019-01-29 珠海格力电器股份有限公司 A kind of detection method and heat-reclamation multi-compressors air-conditioning system of heat-reclamation multi-compressors air-conditioning system communication connection mistake
CN113874662A (en) * 2019-05-23 2021-12-31 Lg电子株式会社 Air conditioner

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