CN206300316U - Large-cooling-capacity variable frequency air conditioner system and large-cooling-capacity variable frequency air conditioner - Google Patents

Large-cooling-capacity variable frequency air conditioner system and large-cooling-capacity variable frequency air conditioner Download PDF

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Publication number
CN206300316U
CN206300316U CN201621197895.3U CN201621197895U CN206300316U CN 206300316 U CN206300316 U CN 206300316U CN 201621197895 U CN201621197895 U CN 201621197895U CN 206300316 U CN206300316 U CN 206300316U
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temperature
valve
conditioning system
capillary
expansion valve
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李志强
赵亮
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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Abstract

The utility model relates to a big cold volume variable frequency air conditioner system and big cold volume variable frequency air conditioner. This air conditioning system includes: the air conditioner comprises a controller, a throttling device, a four-way valve, a condenser, an evaporator, a compressor, a gas-liquid separator, a pressure sensor and an exhaust temperature sensing bulb, wherein the throttling device comprises an electronic expansion valve and a capillary throttle valve, the electronic expansion valve is respectively communicated with the condenser and the evaporator, and the capillary throttle valve is respectively communicated with the condenser and the evaporator. The air conditioner comprises the high-cooling-capacity variable frequency air conditioning system. The large-cooling-capacity variable-frequency air conditioning system and the air conditioner thereof solve the problem of small adjusting range of the thermal expansion valve. The flow regulation device can meet the flow regulation requirements of different environmental temperatures and different air conditioner loads, is high in regulation precision, and can set different target exhaust temperature values according to different environmental temperatures so as to regulate the opening degree of the electronic expansion valve and improve the system reliability.

Description

High cooling power frequency-conversion air-conditioning system and High cooling power convertible frequency air-conditioner
Technical field
The utility model is related to air-conditioning technical field, and more particularly to a kind of High cooling power frequency-conversion air-conditioning system and High cooling power become Frequency air-conditioning.
Background technology
With the development of science and technology and social economy, the progressive active influence of science and technology the economy of society and changes people Life style.Throttling arrangement is the Important Components of air-conditioner, and for air-conditioner, the uninterrupted of throttling arrangement is determined The size of system refrigerant circulation.It is at present to use capillary-compensated and heating power expansion valve for commercial High cooling power air-conditioner more Throttling.
However, being had the disadvantage that using the air-conditioner that capillary-compensated and heating power expansion valve throttle:
1st, use the shortcoming of capillary-compensated for:Flow is unadjustable, especially for transducer air conditioning or off-loadable change Capacity air conditioner device, it is difficult to meet traffic demand at full capacity with underload simultaneously.When environment temperature changes or air-conditioning is negative When lotus changes, capillary flow rate is unadjustable, so the ability efficiency of unit is played and operational reliability has larger Influence.
2nd, use the shortcoming of heating power expansion valve for:Although air-conditioner can be adjusted according to different environment temperatures and payload Flow, but adjustable range is smaller, it is difficult to meet the Flow-rate adjustment of High cooling power frequency-conversion air-conditioning system particularly multi-connected air conditioner device It is required that.
Utility model content
Based on this, it is necessary to for the technical problem for how improving system reliability, there is provided a kind of High cooling power convertible frequency air-conditioner System and High cooling power convertible frequency air-conditioner.
A kind of High cooling power frequency-conversion air-conditioning system.The air-conditioning system includes:Controller, throttling arrangement, four-way valve, condenser, Evaporator, compressor and gas-liquid separator, the controller are electrically connected with the throttling arrangement, the four-way valve respectively with it is described Condenser, the evaporator, the compressor and the gas-liquid separator connection, the compressor also with the gas-liquid separator Connection, the High cooling power frequency-conversion air-conditioning system also includes the pressure sensor for being electrically connected with the controller respectively and exhaust temperature-sensitive Bag, the pressure sensor and exhaust temperature-sensitive bag are set adjacent to the compressor, be respectively used to detection pressure at expulsion and detection is arranged Temperature degree;The throttling arrangement includes the electric expansion valve and capillary-compensated valve that are electrically connected with the controller respectively, described Electric expansion valve and the capillary-compensated valve are in parallel, and the electric expansion valve distinguishes the condenser and the evaporator connects Logical, the capillary-compensated valve distinguishes the condenser and evaporator connection.
Wherein in one embodiment, the capillary-compensated valve includes the capillary and magnetic valve of series connection, the capillary Pipe is also connected with the evaporator, and the magnetic valve is also connected with the condenser, and the magnetic valve is electrically connected with the controller Connect.
Wherein in one embodiment, the High cooling power frequency-conversion air-conditioning system is also included for detecting outdoor environment temperature Outdoor environment temperature temperature-sensitive bag and the indoor environment temperature temperature-sensitive bag for detecting indoor environment temperature, the outdoor environment temperature Temperature-sensitive bag and the indoor environment temperature temperature-sensitive bag are electrically connected with the controller respectively.
A kind of High cooling power convertible frequency air-conditioner.The air-conditioning includes above-mentioned High cooling power frequency-conversion air-conditioning system.
Above-mentioned High cooling power frequency-conversion air-conditioning system and its air-conditioning, difference is met by the parallel connection of electric expansion valve and capillary The Flow-rate adjustment requirement of environment temperature and different load, capillary passes through solenoid valve control break-make, when system pressure is compared with Gao Shike Pressure release is carried out by capillary.Solve the normal capillary uncontrollable problem of pipe flow.Solve thermal expansion valve regulation model Enclose small problem.The Flow-rate adjustment demand of varying environment temperature and different air conditioner loads is suitable for, degree of regulation is high, can be according to not Different target exhaust temperature values are set with environment temperature, the aperture of electric expansion valve is adjusted with this, improve system reliability.
Brief description of the drawings
Fig. 1 is the structural representation of High cooling power frequency-conversion air-conditioning system in an implementation method;
The step of Fig. 2 is the control method of High cooling power frequency-conversion air-conditioning system throttling arrangement in implementation method flow is illustrated Figure.
Specific embodiment
To enable above-mentioned purpose of the present utility model, feature and advantage more obvious understandable, below in conjunction with the accompanying drawings to this The specific embodiment of utility model is described in detail.Elaborate many details in order to abundant in the following description Understand the utility model.But the utility model can be implemented with being much different from other manner described here, this area Technical staff can do similar improvement in the case of without prejudice to the utility model intension, therefore the utility model does not receive following public affairs The limitation of the specific embodiment opened.
Fig. 1 is referred to, it is the structural representation of High cooling power frequency-conversion air-conditioning system in an implementation method, the air-conditioning system Including:Controller, throttling arrangement, four-way valve, condenser, evaporator, compressor, gas-liquid separator, pressure sensor and exhaust Temperature-sensitive bag.
Controller is electrically connected with throttling arrangement.Four-way valve connects with condenser, evaporator, compressor and gas-liquid separator respectively It is logical.Compressor is also connected with gas-liquid separator.Pressure sensor and exhaust temperature-sensitive bag are electrically connected with the controller respectively.Pressure sensing Device and exhaust temperature-sensitive bag are set adjacent to compressor, are respectively used to detection pressure at expulsion and detection delivery temperature.Throttling arrangement includes The electric expansion valve and capillary-compensated valve being electrically connected with the controller respectively, electric expansion valve and capillary-compensated valve are in parallel, electricity Sub- expansion valve difference condenser and evaporator connection, capillary-compensated valve difference condenser and evaporator connection.
To improve control effect, wherein in one embodiment, capillary-compensated valve includes the capillary and electromagnetism of series connection Valve, capillary is also connected with evaporator, and magnetic valve is also connected with condenser, and magnetic valve is electrically connected with the controller.So by control Device processed controls magnetic valve, realizes the conducting and shut-off of capillary, effectively controls capillary, improves control effect.
For the temperature inside and outside sensing chamber, wherein in one embodiment, High cooling power frequency-conversion air-conditioning system also includes being used for Detect the outdoor environment temperature temperature-sensitive bag and the indoor environment temperature temperature-sensitive for detecting indoor environment temperature of outdoor environment temperature Bag, outdoor environment temperature temperature-sensitive bag and indoor environment temperature temperature-sensitive bag are electrically connected with the controller respectively, for the temperature that will be detected Angle value is transmitted into controller.
It is noted that the utility model further relates to a kind of High cooling power convertible frequency air-conditioner.The High cooling power convertible frequency air-conditioner includes Above-mentioned High cooling power frequency-conversion air-conditioning system.
Above-mentioned High cooling power frequency-conversion air-conditioning system and its air-conditioning, difference is met by the parallel connection of electric expansion valve and capillary The Flow-rate adjustment requirement of environment temperature and different load, capillary passes through solenoid valve control break-make, when system pressure is compared with Gao Shike Pressure release is carried out by capillary.Solve the normal capillary uncontrollable problem of pipe flow.Solve thermal expansion valve regulation model Enclose small problem.The Flow-rate adjustment demand of varying environment temperature and different air conditioner loads is suitable for, degree of regulation is high, can be according to not Different target exhaust temperature values are set with environment temperature, the aperture of electric expansion valve is adjusted with this, improve system reliability.
The control method of the present embodiment is used for the High cooling power frequency-conversion air-conditioning system shown in control figure 1.Fig. 2 is referred to, it is Schematic flow sheet the step of control method 20 of High cooling power frequency-conversion air-conditioning system throttling arrangement in one implementation method.With reference to Fig. 1 And Fig. 2, the air-conditioning system schematic diagram as shown in figure 1, with reference to the control method of the present embodiment, for example, attached in exhaust outlet of compressor The pressure sensor of the nearly exhaust temperature-sensitive bag for having detection delivery temperature and detection pressure at expulsion, its throttling arrangement is by electronic expansion Valve, capillary and solenoid valve block are into wherein magnetic valve can control the break-make of capillary.Only opened when air-conditioner load is smaller Electric expansion valve, now meets the demand of air-conditioning underload low discharge;When air-conditioner load is larger, electric expansion valve is opened same When open magnetic valve, corresponding capillary is connected, and meets the demand of the high load capacity big flow of unit.When system high pressure is higher, Can positive opening throttle capillary tube reducing high pressure.
To further appreciate that the High cooling power frequency-conversion air-conditioning system shown in Fig. 1 of the present embodiment, the controlling party as shown in Figure 2 Method is used to control High cooling power frequency-conversion air-conditioning system, as shown in Fig. 2 a kind of for example, High cooling power frequency-conversion air-conditioning system throttling arrangement Control method 20 comprises the following steps:
Step S201:Obtain the exhaust pressure value and outlet air temperature of frequency-conversion air-conditioning system.
Specifically, installing the exhaust temperature-sensitive bag of detection delivery temperature and the pressure of detection pressure at expulsion in frequency-conversion air-conditioning system Force snesor, to obtain the exhaust pressure value and outlet air temperature of frequency-conversion air-conditioning system.It is to improve control accuracy, wherein one In individual embodiment, the exhaust pressure value and outlet air temperature of frequency-conversion air-conditioning system are obtained, including:Obtain the pressure of frequency-conversion air-conditioning system Exhaust pressure value and outlet air temperature near contracting machine exhaust outlet.
Step S202:When exhaust pressure value is less than preset pressure threshold value, outlet air temperature and preset temperature threshold value are calculated Temperature gap.
Specifically, the exhaust pressure value that will be got carries out contrast judgement with preset pressure threshold value, when exhaust pressure value is small When preset pressure threshold value, the temperature gap of outlet air temperature and preset temperature threshold value is calculated.Wherein in one embodiment, meter The temperature gap of outlet air temperature and preset temperature threshold value is calculated, including:Obtain outdoor environment temperature value and indoor environment temperature value. According to outdoor environment temperature value and indoor environment temperature value, preset temperature threshold value is set.Outlet air temperature is subtracted into preset temperature Threshold value, obtains temperature gap.
For example, for the different compressor target exhaust temperature of different indoor and outdoor surroundingses temperature settings, inside and outside different chamber Compressor target exhaust temperature value is as shown in table 1 below under environment temperature:
Table 1
Step S203:Judge temperature gap whether in the range of target exhaust temperature.
Specifically, the size of air conditioner load is fixed according to the difference of actual temperature and design temperature, difference is bigger, and load is bigger, Whether reflection is exactly on this system the size of flow, therefore according to target exhaust temperature temperature gap can be judged in target In exhaust temperature ranges, so as to set the aperture of throttling arrangement.
Step S204:If so, then generating control signal.
Specifically, when temperature gap is in the range of target exhaust temperature, control signal is generated, including:Obtain frequency conversion empty The startup time of the compressor of adjusting system.When between upon start up more than default startup time threshold, control signal is generated.
For example, the control of electric expansion valve is as follows:In compressor start 3min, electric expansion valve step number P=a1*f compressions Unit frequency+b1*T outdoor environment temperature+c1*T indoor environment temperatures, after compressor start 3min, electronic expansion valve opening according to The difference of actual exhaust air temperature and target exhaust temperature is adjusted
As T actual exhaust air temperature-T target exhaust temperatures≤- A, electric expansion valve is walked per N is turned down within M seconds.
As-A < T actual exhaust air temperature-T target exhaust temperatures≤- B, electric expansion valve is walked per P is turned down within M seconds.
As-B < T actual exhaust air temperature-T target exhaust temperatures≤- C, electric expansion valve is walked per Q is turned down within M seconds.
When-C < T actual exhaust air temperature-T target exhaust temperature≤0, electric expansion valve maintains current step number.
As 0 < T actual exhaust air temperature-T target exhaust temperatures≤D, electric expansion valve maintains current step number.
As D < T actual exhaust air temperature-T target exhaust temperatures≤E, electric expansion valve is walked per big R is opened within M seconds.
As E < T actual exhaust air temperature-T target exhaust temperatures≤F, electric expansion valve is walked per big S is opened within M seconds.
During T actual exhaust air temperature-T target exhaust temperature > F, electric expansion valve is walked per big T is opened within M seconds.
Note:Above-mentioned A, B, C, E, F, T etc. are positive number.
For example, the control method of throttle capillary tube magnetic valve is as follows:
Electric expansion valve updated a target step number per t seconds, and target step number is according to above-mentioned part 2 logical calculated
1. refrigeration or dehumidification mode under
Throttle capillary tube magnetic valve gives tacit consent to open mode
1) when T actual exhaust air temperature-T target exhaust temperatures≤X DEG C and when electric expansion valve step number is walked less than m, throttle hair Tubule closed electromagnetic valve, first P=a2*f compressors are adjusted to frequently before throttle capillary tube magnetic valve is closed by electric expansion valve step number Rate+b2*T outdoor environment temperature+c2*T indoor environment temperatures, are adjusted after maintaining t seconds according to above-mentioned part 2 logic
2) when throttle capillary tube is closed, T actual exhaust airs temperature-T target exhaust temperature > Y DEG C and electronic expansion When valve step number is walked more than n, throttle capillary tube magnetic valve is opened, electric expansion valve is controlled according to part 2 logic afterwards
3) when throttle capillary tube is closed, T actual exhaust airs temperature-T target exhaust temperature > Z DEG C and system exhaust When pressure is more than p MPa, throttle capillary tube magnetic valve is opened, electric expansion valve is controlled (this according to part 2 logic afterwards Article priority higher than the 1) article)
2. under heating mode
Throttle capillary tube is closed when heating, and throttle capillary tube magnetic valve is opened after defrost is entered, and is throttled when exiting defrost Capillary closed electromagnetic valve, electric expansion valve step number returns to the step number into before defrost
3. under air supply pattern, throttle capillary tube closed electromagnetic valve
4. during system oil return, throttle capillary tube magnetic valve is opened, and electronic expansion valve opening maintains q steps, exits oil return Afterwards, electric expansion valve returns to the aperture into before oil return, is controlled according to part 2 logic
Step S205:Throttling arrangement is sent a control signal to, to control the break-make of throttling arrangement.
Specifically, wherein in one embodiment, control signal is electronic expansion valve controls signal.Send a control signal to Throttling arrangement, to control the break-make of throttling arrangement, including:Send the electronic expansion of electronic expansion valve controls signal to throttling arrangement Valve, to control the break-make of the electric expansion valve of throttling arrangement.
Wherein in one embodiment, control signal is solenoid valve control signal.Throttling arrangement is sent a control signal to, with The break-make of throttling arrangement is controlled, including:Obtain the step number of the electric expansion valve of frequency-conversion air-conditioning system.When step number meets default step number When, the magnetic valve of solenoid valve control signal to throttling arrangement is sent, to control the break-make of the magnetic valve of throttling arrangement.
For example, assignment is carried out to the variable of such scheme, to absolutely prove the present embodiment, for example, first group:A=15, B =10, C=5, D=5, E=10, F=15, N=20, P=15, Q=10, R=10, S=15, T=20, X=5, Y=5, Z= 3, a1=1, b1=1, c1=3, a2=1, b2=1, c2=2, m=100, n=380 are, it is necessary to explanation, fCompressor frequencyIt is current Compressor frequency, it is impossible to assignment;Similarly, TOutdoor environment temperatureIt is the temperature of sensor detection, it is impossible to assignment;Similarly, TIndoor environment temperatureIt is The temperature of sensor detection, it is impossible to assignment.Can so obtain:T=30, p=3.8, q=300.
For example, assignment is carried out to the variable of such scheme, to absolutely prove the present embodiment, for example, second group:A=12, B =8, C=3, D=3, E=8, F=12, N=15, P=10, Q=5, R=5, S=10, T=15, X=3, Y=3, Z=2, a1 =1, b1=1, c1=2, a2=1, b2=1, c2=3, m=90, n=400.It should be noted that fCompressor frequencyIt is current pressure Contracting unit frequency, it is impossible to assignment;Similarly, TOutdoor environment temperatureIt is the temperature of sensor detection, it is impossible to assignment;Similarly, TIndoor environment temperatureIt is sensing The temperature of device detection, it is impossible to assignment.Can so obtain:T=40, p=3.6, q=320.
The control method of above-mentioned High cooling power frequency-conversion air-conditioning system throttling arrangement, by exhaust pressure value and outlet air temperature, Control throttling arrangement, so as to meet the Flow-rate adjustment requirement of varying environment temperature and different load.Solve normal capillary pipe stream Measure uncontrollable problem.Solve the problems, such as that heating power expansion valve adjustable range is small.It is suitable for varying environment temperature and different skies Adjust the Flow-rate adjustment demand of load, degree of regulation is high, can according to the different target exhaust temperature value of varying environment temperature setting, with This aperture to adjust throttling arrangement, improves system reliability.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed, But therefore can not be interpreted as the limitation to utility model patent scope.It should be pointed out that for the common skill of this area For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to Protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.

Claims (4)

1. a kind of High cooling power frequency-conversion air-conditioning system, including:Controller, throttling arrangement, four-way valve, condenser, evaporator, compressor And gas-liquid separator, the controller electrically connects with the throttling arrangement, the four-way valve respectively with the condenser, the steaming Hair device, the compressor and gas-liquid separator connection, the compressor are also connected with the gas-liquid separator, and its feature exists In,
The High cooling power frequency-conversion air-conditioning system also includes the pressure sensor for being electrically connected with the controller respectively and exhaust temperature-sensitive Bag, the pressure sensor and exhaust temperature-sensitive bag are set adjacent to the compressor, be respectively used to detection pressure at expulsion and detection is arranged Temperature degree;
The throttling arrangement includes the electric expansion valve and capillary-compensated valve that are electrically connected with the controller respectively, the electronics Expansion valve and the capillary-compensated valve are in parallel, and the electric expansion valve distinguishes the condenser and evaporator connection, institute State capillary-compensated valve and distinguish the condenser and evaporator connection.
2. High cooling power frequency-conversion air-conditioning system according to claim 1, it is characterised in that the capillary-compensated valve includes string The capillary and magnetic valve of connection, the capillary are also connected with the evaporator, and the magnetic valve is also connected with the condenser, The magnetic valve is electrically connected with the controller.
3. High cooling power frequency-conversion air-conditioning system according to claim 1, it is characterised in that the High cooling power frequency-conversion air-conditioning system Also include the outdoor environment temperature temperature-sensitive bag and the indoor ring for detecting indoor environment temperature for detecting outdoor environment temperature Border temperature temperature-sensitive bag, the outdoor environment temperature temperature-sensitive bag and the indoor environment temperature temperature-sensitive bag are electric with the controller respectively Connection.
4. a kind of High cooling power convertible frequency air-conditioner, it is characterised in that become including High cooling power as claimed any one in claims 1 to 3 Frequency air-conditioning system.
CN201621197895.3U 2016-11-04 2016-11-04 Large-cooling-capacity variable frequency air conditioner system and large-cooling-capacity variable frequency air conditioner Active CN206300316U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106440251A (en) * 2016-11-04 2017-02-22 珠海格力电器股份有限公司 Large-cooling-capacity variable-frequency air conditioner system, air conditioner and control method of throttling device of air conditioner
CN108081913A (en) * 2017-11-29 2018-05-29 龙泉市宏盛科技咨询服务有限公司 A kind of energy-saving and emission-reducing automobile fitting air-conditioning
CN110631291A (en) * 2019-10-22 2019-12-31 浙江智恩电子科技有限公司 Air source heat pump system combined with photovoltaic system
CN110822671A (en) * 2019-10-31 2020-02-21 广东志高暖通设备股份有限公司 Control method for electronic expansion valve of multi-split outdoor unit
CN111059665A (en) * 2019-12-28 2020-04-24 维克(天津)有限公司 Air-cooled partial heat recovery unit system and control mode
CN111550904A (en) * 2020-04-13 2020-08-18 宁波奥克斯电气股份有限公司 Electronic expansion valve control method and device and air conditioner
CN113251567A (en) * 2021-06-09 2021-08-13 珠海格力电器股份有限公司 Heating control method and device and air conditioning system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106440251A (en) * 2016-11-04 2017-02-22 珠海格力电器股份有限公司 Large-cooling-capacity variable-frequency air conditioner system, air conditioner and control method of throttling device of air conditioner
CN108081913A (en) * 2017-11-29 2018-05-29 龙泉市宏盛科技咨询服务有限公司 A kind of energy-saving and emission-reducing automobile fitting air-conditioning
CN110631291A (en) * 2019-10-22 2019-12-31 浙江智恩电子科技有限公司 Air source heat pump system combined with photovoltaic system
CN110822671A (en) * 2019-10-31 2020-02-21 广东志高暖通设备股份有限公司 Control method for electronic expansion valve of multi-split outdoor unit
CN110822671B (en) * 2019-10-31 2021-02-26 广东志高暖通设备股份有限公司 Control method for electronic expansion valve of multi-split outdoor unit
CN111059665A (en) * 2019-12-28 2020-04-24 维克(天津)有限公司 Air-cooled partial heat recovery unit system and control mode
CN111059665B (en) * 2019-12-28 2024-03-29 维克(天津)有限公司 Air-cooled part heat recovery unit system and control mode
CN111550904A (en) * 2020-04-13 2020-08-18 宁波奥克斯电气股份有限公司 Electronic expansion valve control method and device and air conditioner
CN111550904B (en) * 2020-04-13 2021-10-15 宁波奥克斯电气股份有限公司 Electronic expansion valve control method and device and air conditioner
CN113251567A (en) * 2021-06-09 2021-08-13 珠海格力电器股份有限公司 Heating control method and device and air conditioning system

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