CN105299836A - Control method for multi-split air conditioning system - Google Patents
Control method for multi-split air conditioning system Download PDFInfo
- Publication number
- CN105299836A CN105299836A CN201510754294.1A CN201510754294A CN105299836A CN 105299836 A CN105299836 A CN 105299836A CN 201510754294 A CN201510754294 A CN 201510754294A CN 105299836 A CN105299836 A CN 105299836A
- Authority
- CN
- China
- Prior art keywords
- compressor
- conditioning system
- control method
- indoor set
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
Abstract
The invention relates to a control method for a multi-split air conditioning system. The multi-split air conditioning system comprises an outdoor unit and indoor units. The outdoor unit comprises a compressor, an oil separator, a four-way valve, a condenser and a bypass valve. The multiple indoor units are connected in parallel. The control method for the multi-split air conditioning system includes the following steps that firstly, when a command indicating to start all the indoor units or parts of the indoor units is received, the indoor units needing to be started are started to the preset opening degree, and meanwhile the bypass valve is opened; secondly, the pressure difference of high pressure and low pressure in the compressor is detected and the start time of the indoor units is recorded; and thirdly, when the pressure difference of high pressure and low pressure is smaller than or equal to a preset pressure value and the recorded indoor unit start time reaches preset duration, the compressor of the outdoor unit is started, and meanwhile the bypass valve is closed. By the adoption of the technical scheme, the pressure difference of the high pressure and the low pressure in the compressor can be balanced when all the indoor units or parts of the indoor units of the multi-split air conditioning system are started, it is guaranteed that the compressor is started without the load, the service life of the compressor is prolonged, and the reliability of the multi-split air conditioning system is greatly improved.
Description
Technical field
The present invention relates to the control method of air-conditioning system, especially a kind of multi-online air-conditioning system control method.
Background technology
Along with the development of converter technique, current most multi-gang air-conditioner device system comprises at least 1 frequency-changeable compressor, and multiple on-line system all adopts frequency-changeable compressor to be the trend of current development.As everyone knows, frequency-changeable compressor must maintain the balance of height pressure reduction before starting, ensure its non-loaded startup.If multi-online air-conditioning system twice interval start-up time is longer, system height pressure reduction may balance slowly; If the frequent start-stop of multi-online air-conditioning system, then its height pressure reduction is difficult to balance, repeatedly frequent start-stop, easily causes compressor to damage because starting overload.Therefore, need to design a kind of control method, can effectively ensure frequency-changeable compressor start at every turn before height pressure balance, extend service life of frequency-changeable compressor.
Summary of the invention
The object of the invention is, for Problems existing in current multi-online air-conditioning system, to provide a kind of multi-online air-conditioning system control method, effectively can ensure that frequency-changeable compressor starts the balance of front height pressure reduction, extend the service life of frequency-changeable compressor.
Technical scheme of the present invention is:
A kind of multi-online air-conditioning system control method, comprise off-premises station and indoor set, described off-premises station comprises compressor, and its refrigerant exit connects oil eliminator, cross valve and condenser successively, and its refrigerant import connects gas-liquid separator and cross valve successively; Pipeline between described oil eliminator and cross valve and be provided with a by-passing valve between the pipeline between described gas-liquid separator and compressor; Pipeline between described compressor and oil eliminator is provided with high pressure sensor, and the pipeline between described cross valve and gas-liquid separator is provided with low pressure sensor; Described indoor set is multiple, and is connected with described condenser and cross valve after parallel connection; The control method of this system comprises the following steps:
1) when receiving the instruction of opening all or part indoor set, the indoor set that need open is opened into default aperture, opens by-passing valve simultaneously;
2) detect high pressure and the low pressure of unit, and obtain high-low pressure pressure reduction, record the indoor set opening time simultaneously;
3) when high-low pressure pressure reduction≤scheduled pressure value, and when the record indoor set opening time reaches scheduled duration, the compressor start of off-premises station, closes by-passing valve simultaneously.
Further, described by-passing valve is magnetic valve.
Further, described compressor is the frequency conversion of separate unit frequency-changeable compressor, the frequency-changeable compressor of two more parallels or two more parallels, any one of constant speed compressor.
Further, described each indoor set comprises the electric expansion valve of heat exchanger and series connection with it.
Further, described scheduled pressure value is 0Mpa ~ 0.02Mpa.
Further, described scheduled duration is 0.5 minute ~ 2 minutes.
Beneficial effect of the present invention:
Technical scheme of the present invention can when all or part indoor set of multi-gang air-conditioner device be opened, and the high-low pressure pressure reduction in balance compressor, ensures compressor non-loaded startup, extends compressor service life, greatly improves the reliability of multi-online air-conditioning system.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Wherein, 1-compressor; 2-oil eliminator; 3-cross valve; 4-condenser; The main electric expansion valve of 5-; 6-electric expansion valve; 7-heat exchanger; 8-gas-liquid separator; 9-by-passing valve; 10-high pressure sensor; 11-low pressure sensor.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As shown in Figure 1.
A kind of multi-online air-conditioning system, comprises an off-premises station and two indoor sets.The electric expansion valve 6 that each indoor set includes heat exchanger 7 and connects with it.Be connected with off-premises station after two indoor set parallel connections.Described off-premises station comprises compressor 1, oil eliminator 2, cross valve 3, condenser 4, main electric expansion valve 5, gas-liquid separator 8 and by-passing valve 9.Wherein the refrigerant exit of compressor 1 is connected to the refrigerant inlet of oil eliminator 2.The refrigerant exit of this oil eliminator 2 is connected to the first interface of cross valve 3.Second interface of this cross valve 3 is connected to the entrance of condenser 4.The outlet of this condenser 4 is connected to the import of indoor set after main electric expansion valve 5.The outlet of described indoor set is connected on the 3rd interface of cross valve 3.4th interface of this cross valve 3 is connected to the refrigerant import of compressor 1 after gas-liquid separator 10.Described by-passing valve 11 one end is connected on the pipeline between oil eliminator 2 and cross valve 3, and the other end is connected on the pipeline between gas-liquid separator 8 and compressor 1, is connected on the entrance pipe of gas-liquid separator 8 bottom described oil eliminator 2.This by-passing valve 9 is magnetic valve, when it is opened, part gaseous coolant can be made to flow to the pipeline between gas-liquid separator 10 and compressor 1 by the pipeline between oil eliminator 2 and cross valve 3; When it is closed, then refrigerant capable of blocking flow to pipeline between gas-liquid separator 10 and compressor 1 by the pipeline between oil eliminator 2 and cross valve 3.Pipeline between described compressor 1 and oil eliminator 2 is provided with high pressure sensor 10, can detect the high pressure of unit.Pipeline between described cross valve 3 and gas-liquid separator 8 is provided with low pressure sensor 11, can detect the low pressure of unit in real time.Described compressor 1 is the frequency conversion of separate unit frequency-changeable compressor, the frequency-changeable compressor of two more parallels or two more parallels, any one of constant speed compressor.
The control method of this multi-online air-conditioning system, comprises the following steps:
1) when receiving the instruction of opening all or part indoor set, the indoor set that need open is opened into default aperture, opens by-passing valve simultaneously;
2) detect high pressure and the low pressure of unit, and obtain high-low pressure pressure reduction, record the indoor set opening time simultaneously;
3) when high-low pressure pressure reduction≤scheduled pressure value, and when the record indoor set opening time reaches scheduled duration, the compressor start of off-premises station, closes by-passing valve simultaneously.
Described scheduled pressure value is between 0MPa to 0.02MPa.Preferably, scheduled pressure value is 0.01MPa.
Described scheduled duration is between 0.5 minute to 2 minutes.Preferably, scheduled duration is 1 minute.
Can when all or part indoor set of multi-gang air-conditioner device to be opened by above-mentioned control method, the high-low pressure pressure reduction in balance compressor, ensures compressor non-loaded startup, extends compressor service life, greatly improves the reliability of multi-online air-conditioning system.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (6)
1. a multi-online air-conditioning system control method, comprises off-premises station and indoor set, and it is characterized in that described off-premises station comprises compressor, its refrigerant exit connects oil eliminator, cross valve and condenser successively, and its refrigerant import connects gas-liquid separator and cross valve successively; Pipeline between described oil eliminator and cross valve and be provided with a by-passing valve between the pipeline between described gas-liquid separator and compressor; Pipeline between described compressor and oil eliminator is provided with high pressure sensor, and the pipeline between described cross valve and gas-liquid separator is provided with low pressure sensor; Described indoor set is multiple, and is connected with described condenser and cross valve after parallel connection; The control method of this system comprises the following steps:
1) when receiving the instruction of opening all or part indoor set, the indoor set that need open is opened into default aperture, and by-passing valve is opened simultaneously;
2) detect high pressure and the low pressure of unit, and obtain high-low pressure pressure reduction, record the indoor set opening time simultaneously;
3) when high-low pressure pressure reduction≤scheduled pressure value, and when the record indoor set opening time reaches scheduled duration, the compressor start of off-premises station, closes by-passing valve simultaneously.
2. multi-online air-conditioning system control method according to claim 1, is characterized in that described by-passing valve is magnetic valve.
3. multi-online air-conditioning system control method according to claim 1, is characterized in that described compressor is the frequency conversion of separate unit frequency-changeable compressor, the frequency-changeable compressor of two more parallels or two more parallels, any one of constant speed compressor.
4. multi-online air-conditioning system control method according to claim 1, is characterized in that described each indoor set comprises the electric expansion valve of heat exchanger and series connection with it.
5. multi-online air-conditioning system control method according to claim 1, is characterized in that described scheduled pressure value is 0Mpa ~ 0.02Mpa.
6. multi-online air-conditioning system control method according to claim 1, is characterized in that described scheduled duration is 0.5 minute ~ 2 minutes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510754294.1A CN105299836A (en) | 2015-11-09 | 2015-11-09 | Control method for multi-split air conditioning system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510754294.1A CN105299836A (en) | 2015-11-09 | 2015-11-09 | Control method for multi-split air conditioning system |
Publications (1)
Publication Number | Publication Date |
---|---|
CN105299836A true CN105299836A (en) | 2016-02-03 |
Family
ID=55197400
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201510754294.1A Pending CN105299836A (en) | 2015-11-09 | 2015-11-09 | Control method for multi-split air conditioning system |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN105299836A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106440558A (en) * | 2016-11-22 | 2017-02-22 | 广东美的暖通设备有限公司 | Air-conditioner differential pressure balance system and air-conditioner |
CN106969524A (en) * | 2016-12-29 | 2017-07-21 | 广东美的暖通设备有限公司 | The balance method of air-conditioning pressure balance system and air-conditioning pressure difference |
CN107763889A (en) * | 2017-11-21 | 2018-03-06 | 宁波奥克斯电气股份有限公司 | A kind of multi-online air-conditioning system and its control method |
CN108278725A (en) * | 2018-01-22 | 2018-07-13 | 南京天加环境科技有限公司 | A kind of method that multi-line system realizes system balancing |
CN108307648A (en) * | 2015-04-28 | 2018-07-20 | 大金工业株式会社 | Air-conditioning device |
CN109737633A (en) * | 2018-12-19 | 2019-05-10 | 宁波工程学院 | A kind of kitchen bathroom integral multifunctional air-conditioner set and its control method |
CN109812920A (en) * | 2019-02-25 | 2019-05-28 | 奥克斯空调股份有限公司 | A kind of control method, device and the multi-line system of the start and stop of air conditioner multi-compressor |
CN112361537A (en) * | 2020-11-23 | 2021-02-12 | 珠海格力电器股份有限公司 | Multi-split air conditioning system and oil return control method and device thereof, storage medium and processor |
US20220279684A1 (en) * | 2019-07-09 | 2022-09-01 | Nec Corporation | Cooling system, surge generation prevention device, surge generation prevention method, and surge generation prevention program |
CN114992866A (en) * | 2022-01-11 | 2022-09-02 | 青岛海尔新能源电器有限公司 | Control method, device and equipment of heat pump water heater |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2401854Y (en) * | 1999-11-05 | 2000-10-18 | 海尔集团公司 | Easy continuous starting air conditioner |
CN101191686A (en) * | 2006-11-30 | 2008-06-04 | 海尔集团公司 | Air conditioner for implementing high and low pressure side pressure balancing |
KR20100002771A (en) * | 2008-06-30 | 2010-01-07 | 엘지전자 주식회사 | Control method of multi-type air-conditioning system |
CN103292421A (en) * | 2013-06-17 | 2013-09-11 | 南京天加空调设备有限公司 | Multi-split refrigeration operation outer draught fan rotating speed control method |
CN103486691A (en) * | 2013-09-17 | 2014-01-01 | 青岛海信日立空调系统有限公司 | Refrigerant flow control method and device for multi-connected air conditioning system |
-
2015
- 2015-11-09 CN CN201510754294.1A patent/CN105299836A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2401854Y (en) * | 1999-11-05 | 2000-10-18 | 海尔集团公司 | Easy continuous starting air conditioner |
CN101191686A (en) * | 2006-11-30 | 2008-06-04 | 海尔集团公司 | Air conditioner for implementing high and low pressure side pressure balancing |
KR20100002771A (en) * | 2008-06-30 | 2010-01-07 | 엘지전자 주식회사 | Control method of multi-type air-conditioning system |
CN103292421A (en) * | 2013-06-17 | 2013-09-11 | 南京天加空调设备有限公司 | Multi-split refrigeration operation outer draught fan rotating speed control method |
CN103486691A (en) * | 2013-09-17 | 2014-01-01 | 青岛海信日立空调系统有限公司 | Refrigerant flow control method and device for multi-connected air conditioning system |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108307648A (en) * | 2015-04-28 | 2018-07-20 | 大金工业株式会社 | Air-conditioning device |
CN106440558A (en) * | 2016-11-22 | 2017-02-22 | 广东美的暖通设备有限公司 | Air-conditioner differential pressure balance system and air-conditioner |
CN106969524A (en) * | 2016-12-29 | 2017-07-21 | 广东美的暖通设备有限公司 | The balance method of air-conditioning pressure balance system and air-conditioning pressure difference |
CN107763889B (en) * | 2017-11-21 | 2020-01-24 | 宁波奥克斯电气股份有限公司 | Multi-split air conditioning system and control method thereof |
CN107763889A (en) * | 2017-11-21 | 2018-03-06 | 宁波奥克斯电气股份有限公司 | A kind of multi-online air-conditioning system and its control method |
CN108278725A (en) * | 2018-01-22 | 2018-07-13 | 南京天加环境科技有限公司 | A kind of method that multi-line system realizes system balancing |
CN109737633A (en) * | 2018-12-19 | 2019-05-10 | 宁波工程学院 | A kind of kitchen bathroom integral multifunctional air-conditioner set and its control method |
CN109812920A (en) * | 2019-02-25 | 2019-05-28 | 奥克斯空调股份有限公司 | A kind of control method, device and the multi-line system of the start and stop of air conditioner multi-compressor |
US20220279684A1 (en) * | 2019-07-09 | 2022-09-01 | Nec Corporation | Cooling system, surge generation prevention device, surge generation prevention method, and surge generation prevention program |
CN112361537A (en) * | 2020-11-23 | 2021-02-12 | 珠海格力电器股份有限公司 | Multi-split air conditioning system and oil return control method and device thereof, storage medium and processor |
CN112361537B (en) * | 2020-11-23 | 2021-10-15 | 珠海格力电器股份有限公司 | Multi-split air conditioning system and oil return control method and device thereof, storage medium and processor |
CN114992866A (en) * | 2022-01-11 | 2022-09-02 | 青岛海尔新能源电器有限公司 | Control method, device and equipment of heat pump water heater |
CN114992866B (en) * | 2022-01-11 | 2024-03-12 | 青岛海尔新能源电器有限公司 | Control method, device and equipment of heat pump water heater |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN105299836A (en) | Control method for multi-split air conditioning system | |
CN103968494B (en) | The control method of air conditioning system and air conditioning system | |
EP3101369A1 (en) | Heat recovery variable-frequency multi-split heat pump system and control method thereof | |
CN203533802U (en) | Air-conditioning system | |
CN204730502U (en) | A kind of cryogenic refrigeration machine room air-conditioner | |
CN201666696U (en) | Air-conditioner return oil system and air conditioner | |
CN105546752B (en) | Air-conditioner control method and device | |
CN203550042U (en) | Multi-split system, multi-split system outdoor machine and outdoor machine unit of multi-split system outdoor machine | |
CN103575514A (en) | Air conditioner and detection method and device thereof | |
CN103884081A (en) | Control method of air conditioner system | |
CN102980327A (en) | Lubricating oil level detecting device and method in air-conditioning system | |
CN202229357U (en) | Low temperature starting device of air conditioning system | |
CN104676953A (en) | Refrigerating and/or heating system and control method thereof | |
CN2401854Y (en) | Easy continuous starting air conditioner | |
CN102235722B (en) | Explosionproof control method for multi-connected air conditioning unit during refrigerant recovery | |
CN104535884A (en) | Method for judging whether indoor machine data line of domestic multi-split unit is wrongly connected | |
CN104791960B (en) | A kind of air conditioner unloading control system and method | |
CN207455816U (en) | Air-conditioner set | |
CN102997360A (en) | Control method of double-partition low-temperature air conditioning system | |
CN103375937A (en) | Multi-connected air conditioning system and control method thereof | |
CN205619430U (en) | Air -conditioner | |
CN204555402U (en) | The split type unit machine refrigeration system of a kind of one drag two | |
CN204830603U (en) | Cooler air -conditioner system | |
CN103791658A (en) | Oil mass regulating and controlling method for multi-connected air conditioning unit | |
CN201653011U (en) | Heat pump system of air conditioner |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160203 |
|
RJ01 | Rejection of invention patent application after publication |