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CN104949297A - Air conditioning unit and pressure control method thereof - Google Patents

Air conditioning unit and pressure control method thereof Download PDF

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Publication number
CN104949297A
CN104949297A CN201410120070.0A CN201410120070A CN104949297A CN 104949297 A CN104949297 A CN 104949297A CN 201410120070 A CN201410120070 A CN 201410120070A CN 104949297 A CN104949297 A CN 104949297A
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CN
China
Prior art keywords
magnetic valve
heat exchanger
control device
air
pipe
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.)
Granted
Application number
CN201410120070.0A
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Chinese (zh)
Other versions
CN104949297B (en
Inventor
胡朝发
郭晓峰
朱波
郑根
陈思磊
陈加加
曹勇
何国军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhuhai Gree Electrical and Mechanical Engineering Co Ltd
Original Assignee
Gree Electric Appliances Inc of Zhuhai
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Priority to CN201410120070.0A priority Critical patent/CN104949297B/en
Publication of CN104949297A publication Critical patent/CN104949297A/en
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Publication of CN104949297B publication Critical patent/CN104949297B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/20Disposition of valves, e.g. of on-off valves or flow control valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/02Compressor control
    • F25B2600/027Compressor control by controlling pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00Control issues
    • F25B2600/25Control of valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21Temperatures
    • F25B2700/2116Temperatures of a condenser
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21Temperatures
    • F25B2700/2117Temperatures of an evaporator

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides an air conditioning unit and a pressure control method thereof, wherein the air conditioning unit comprises an outdoor heat exchanger tube temperature sensing bulb, a first electromagnetic valve and a second electromagnetic valve which are electrically connected with a control device, the control device receives temperature information of the outdoor heat exchanger tube temperature sensing bulb and controls the on-off of the first electromagnetic valve and the second electromagnetic valve, so that the control device can automatically adjust flow according to the change of pressure, the unit can keep the pressure in a proper range under any environmental condition, the air conditioning unit can run in a severe environment, when the over-high pressure of the system is detected, the flow of a refrigerant entering an evaporator is automatically reduced, the evaporation pressure of the system is reduced, the discharge pressure of the running unit is further reduced, and the stable running of the unit is ensured. The invention solves the problem that the air conditioning unit can not operate under severe working conditions due to overhigh pressure, and greatly improves the reliability and the comfort of the operation of the unit.

Description

Air-conditioner set and compress control method thereof
Technical field
The present invention relates to air-conditioning unit structure and control technology field, particularly relate to a kind of air-conditioner set and compress control method thereof.
Background technology
A lot of air-conditioner set is in running at present, and when environment temperature is too high, the pressure of system is usually all higher, and in order to reduce the pressure of system cloud gray model, ensures reliability of operation, and a lot of unit is often all provided with pressure switch or high temperature-proof defencive function.Its operation principle is: compressor, the refrigerant of evaporimeter (being in fact cold-producing medium, such as R22) compression, is then delivered to condenser and cooled.When environment temperature is higher, because condenser temperature is too high, cause cold-producing medium to liquefy, pressure raises, and other reasons causes pipeline pressure to raise, in order to avoid catastrophe failure appears in system, and high voltage protective switch motion, thus cut off compressor power.
But all there is certain defect in these current high temperature-proof guard methods.On the one hand, when environment temperature is higher, pressure is higher, and unit more easily occurs high voltage protective, and now user then more needs refrigeration, if when causing unit to run because of hypertonia, is then easy to the complaint causing user.On the other hand, some air-conditioner set adopt high temperature-proof protection, although unit can also run, now often cause a large amount of times liquid because blower fan is out of service, cause liquid hammer, had a strong impact on the reliability of compressor operating.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of air-conditioner set and compress control method thereof, realizing air-conditioner set can both remain in suitable scope under any environmental condition by pressure, solve air-conditioner set under bad working environments due to the problem that hypertonia can not be run, substantially increase air-conditioner set reliability of operation and comfortableness.
The present invention is achieved through the following technical solutions:
Air-conditioner set, includes compressor, reservoir, indoor heat exchanger, outdoor heat exchanger, throttling arrangement, multistage refrigerant pipe and control device; Described compressor, reservoir, indoor heat exchanger, outdoor heat exchanger are connected by refrigerant pipe with throttling arrangement; Throttling arrangement is connected between indoor heat exchanger and outdoor heat exchanger; Reservoir connects the suction end of compressor; Described reservoir includes feed tube and drain pipe, and drain pipe connects the vapour liquid separator of compressor, and feed tube connects throttling arrangement; Wherein, Described air-conditioner set includes the first magnetic valve and the second magnetic valve, first magnetic valve is arranged on and connects on the drain pipe of reservoir and the refrigerant pipe of vapour liquid separator, and described second magnetic valve is arranged on and connects on the feed tube of reservoir and the refrigerant pipe of the throttling arrangement throttling port of export; Described air-conditioner set includes outdoor heat exchange organ pipe warming thermometer bulb; Described outdoor heat exchange organ pipe warming thermometer bulb, the first magnetic valve and the second magnetic valve are all electrically connected with control device, and the temperature information of control device receiving chamber external heat exchanger pipe warming thermometer bulb, controls the break-make of the first magnetic valve and the second magnetic valve.
Wherein in an embodiment, described air-conditioner set is a kind of heat pump air conditioner unit, includes plate type heat exchanger and cross valve, and four ports of described plate type heat exchanger connect the feed tube of reservoir, drain pipe, cross valve and the second magnetic valve respectively; The feed tube of reservoir is communicated with the second magnetic valve, and the drain pipe of reservoir is communicated with cross valve.
Further, the vehicle repair major district of described outdoor heat exchange organ pipe warming thermometer bulb heat exchanger disposed in the outdoor.
Further, described air-conditioner set includes the 3rd magnetic valve, the described first end of the 3rd magnetic valve and the first end of the second magnetic valve are connected the two ends of throttling arrangement respectively, and described second end of the 3rd magnetic valve and the second end of the second magnetic valve are connected on the refrigerant pipe between the feed tube of reservoir and throttling arrangement jointly.
Further, described air-conditioner set includes indoor heat exchanger pipe warming thermometer bulb, described indoor heat exchanger pipe warming thermometer bulb and control device are electrically connected, and the temperature information of Tube Sheet of Heat Exchanger warming thermometer bulb in control device receiving chamber, controls the break-make of the first magnetic valve and the 3rd magnetic valve.
Further, the vehicle repair major district of described indoor heat exchanger pipe warming thermometer bulb heat exchanger disposed in the interior.
The compress control method of above-mentioned air-conditioner set, wherein, during refrigerating operaton, comprises the steps:
1), when control device detect: during outdoor heat exchange organ pipe temperature T >=the first set temperature value T1, the second magnetic valve is opened, the liquid refrigerants after throttling has sub-fraction to be entered in reservoir by the second magnetic valve to store;
2), when control device detect: during second set temperature value T2 < outdoor heat exchange organ pipe temperature T < the first set temperature value T1, then the second closed electromagnetic valve, air-conditioner set pressure maintains current state;
3), when control device detects: during outdoor heat exchange organ pipe temperature T≤the second set temperature value T2, then the second closed electromagnetic valve, the first magnetic valve cuts out after opening the first setting-up time h1.
Further, after the second magnetic valve is opened, the liquid refrigerants after throttling has sub-fraction to flow through plate type heat exchanger by the second magnetic valve, carries out heat exchange with the refrigerant that directly heat exchanger is evaporated indoor.
Further, the compress control method of above-mentioned air-conditioner set, wherein, during heating operation, comprises the steps:
A), when control device detect: during indoor heat exchanger pipe temperature t >=the 3rd set temperature value T3, the 3rd magnetic valve is opened, the second closed electromagnetic valve, the liquid refrigerants after throttling has sub-fraction to be entered in reservoir by the 3rd magnetic valve to store;
B), when control device detect: during the 4th set temperature value T4 < indoor heat exchanger pipe temperature t < the 3rd set temperature value T3, then the 3rd closed electromagnetic valve, air-conditioner set pressure maintains current state;
C), when control device detects: during indoor heat exchanger pipe temperature t≤the 4th set temperature value T4, then the second closed electromagnetic valve, the first magnetic valve cuts out after opening the second setting-up time h2.
Beneficial effect of the present invention is as follows:
Air-conditioner set of the present invention and compress control method thereof, air-conditioner set includes outdoor heat exchange organ pipe warming thermometer bulb, first magnetic valve and the second magnetic valve, all be electrically connected with control device, the temperature information of control device receiving chamber external heat exchanger pipe warming thermometer bulb, control the break-make of the first magnetic valve and the second magnetic valve, therefore, it is possible to automatically carry out Flow-rate adjustment according to the change of pressure, make unit pressure can both be remained in suitable scope under any environmental condition, air-conditioner set is run in rugged environment, when the hypertonia of system being detected, then automatically reduce the cold medium flux entering evaporimeter, the evaporating pressure of reduction system, and then reduce the pressure at expulsion of unit operation, guarantee that unit can stable operation.Solve air-conditioner set under bad working environments due to the problem that hypertonia can not be run, substantially increase reliability and the comfortableness of unit operation.
Accompanying drawing explanation
Fig. 1 is the system architecture schematic diagram of air-conditioner set of the present invention;
Fig. 2 is the flow chart of the compress control method of air-conditioner set of the present invention.
Description of reference numerals:
1, control device, 2, throttling arrangement, 3, plate type heat exchanger, 4, outdoor heat exchange organ pipe warming thermometer bulb, 5, outdoor heat exchanger, 6, indoor heat exchanger pipe warming thermometer bulb, the 7, the 3rd magnetic valve, the 8, second magnetic valve, the 9, first magnetic valve.
Detailed description of the invention
The present invention, in order to solve the problem of prior art, proposes a kind of air-conditioner set, as Fig. 1, includes compressor, reservoir, indoor heat exchanger, outdoor heat exchanger 5, throttling arrangement 2, multistage refrigerant pipe and control device 1; Described compressor, reservoir, indoor heat exchanger, outdoor heat exchanger 5 are connected by refrigerant pipe with throttling arrangement 2; Throttling arrangement 2 is connected between indoor heat exchanger and outdoor heat exchanger 5; Reservoir connects the suction end of compressor; Described reservoir includes feed tube and drain pipe, and drain pipe connects the vapour liquid separator of compressor, and feed tube connects throttling arrangement 2; Wherein, Described air-conditioner set includes the first magnetic valve 9 and the second magnetic valve 8, first magnetic valve 9 is arranged on and connects on the drain pipe of reservoir and the refrigerant pipe of vapour liquid separator, and described second magnetic valve 8 is arranged on and connects on the feed tube of reservoir and the refrigerant pipe of the throttling arrangement throttling port of export; Described air-conditioner set includes outdoor heat exchange organ pipe warming thermometer bulb 4; Described outdoor heat exchange organ pipe warming thermometer bulb 4, first magnetic valve 9 and the second magnetic valve 8 are all electrically connected with control device 1, and the temperature information of control device 1 receiving chamber external heat exchanger pipe warming thermometer bulb 4, controls the break-make of the first magnetic valve 9 and the second magnetic valve 8.
Wherein in an embodiment, described air-conditioner set is a kind of heat pump air conditioner unit, includes plate type heat exchanger 3 and cross valve, and four ports of described plate type heat exchanger 3 connect the feed tube of reservoir, drain pipe, cross valve and the second magnetic valve 8 respectively; The feed tube of reservoir is communicated with the second magnetic valve 8, and the drain pipe of reservoir is communicated with cross valve.
Further, the vehicle repair major district of described outdoor heat exchange organ pipe warming thermometer bulb 4 heat exchanger 5 disposed in the outdoor.
Further, described air-conditioner set includes the 3rd magnetic valve 7, first end and the first end of the second magnetic valve 8 of described 3rd magnetic valve 7 are connected the two ends of throttling arrangement 2 respectively, and described second end of the 3rd magnetic valve 7 and the second end of the second magnetic valve 8 are connected on the refrigerant pipe between the feed tube of reservoir and throttling arrangement 2 jointly.
Further, described air-conditioner set includes indoor heat exchanger pipe warming thermometer bulb 6, described indoor heat exchanger pipe warming thermometer bulb 6 is electrically connected with control device 1, and the temperature information of Tube Sheet of Heat Exchanger warming thermometer bulb 6 in control device 1 receiving chamber, controls the break-make of the first magnetic valve 9 and the 3rd magnetic valve 7.
Further, the vehicle repair major district of described indoor heat exchanger pipe warming thermometer bulb 6 heat exchanger disposed in the interior.
The compress control method of above-mentioned air-conditioner set, wherein, as Fig. 2, during refrigerating operaton, comprises the steps:
1), when control device detect: during outdoor heat exchange organ pipe temperature T >=the first set temperature value T1, the second magnetic valve is opened, the liquid refrigerants after throttling has sub-fraction to be entered in reservoir by the second magnetic valve to store;
2), when control device detect: during second set temperature value T2 < outdoor heat exchange organ pipe temperature T < the first set temperature value T1, then the second closed electromagnetic valve, air-conditioner set pressure maintains current state;
3), when control device detects: during outdoor heat exchange organ pipe temperature T≤the second set temperature value T2, then the second closed electromagnetic valve, the first magnetic valve cuts out after opening the first setting-up time h1.
Further, after the second magnetic valve is opened, the liquid refrigerants after throttling has sub-fraction to flow through plate type heat exchanger by the second magnetic valve, carries out heat exchange with the refrigerant that directly heat exchanger is evaporated indoor
Further, the compress control method of above-mentioned air-conditioner set, wherein, during heating operation, comprises the steps:
A), when control device detect: during indoor heat exchanger pipe temperature t >=the 3rd set temperature value T3, the 3rd magnetic valve is opened, the second closed electromagnetic valve, the liquid refrigerants after throttling has sub-fraction to be entered in reservoir by the 3rd magnetic valve to store;
B), when control device detect: during the 4th set temperature value T4 < indoor heat exchanger pipe temperature t < the 3rd set temperature value T3, then the 3rd closed electromagnetic valve, air-conditioner set pressure maintains current state;
C), when control device detects: during indoor heat exchanger pipe temperature t≤the 4th set temperature value T4, then the second closed electromagnetic valve, the first magnetic valve cuts out after opening the second setting-up time h2.
Embodiment:
As shown in Figure 1, 2, the present embodiment discloses a kind of heat pump air conditioner unit circulatory system, is made up of off-premises station, indoor set, connecting line.Unit is provided with control device, indoor outer tube warming thermometer bulb, plate type heat exchanger and magnetic valve etc.Control device is by pipe warming thermometer bulb detected temperatures.Indoor and outdoor Tube Sheet of Heat Exchanger warming thermometer bulb is all arranged on the two-phase section of heat exchanger, and [process of cold-producing medium condensation is within the condenser mainly through three phases: just to have started be overheated zone (refrigerant is gaseous state entirely), be next two-phase section (refrigerant is vapour-liquid mixed state), be finally cold-zone (refrigerant be entirely liquid) at two-phase section owing to being liquid-vapor mixture, so saturation temperature and saturation pressure are one to one, namely the force value of system can be extrapolated according to temperature value], the temperature detected is system high pressure saturation temperature, and then reflects the high-voltage value of system.Pipe temperature higher limit, lower limit is preset with in control device.When refrigeration is normally run, the first magnetic valve 9, second magnetic valve 8, the 3rd magnetic valve 7 are all closed.Magnetic valve is by following logic control:
1, as control device sensing chamber external heat exchanger pipe temperature T >=the first set temperature value T1, the pressure then reflecting system is higher, now the second magnetic valve 8 is opened, liquid refrigerants after throttling will directly enter in reservoir after sub-fraction will be had to flow through plate type heat exchanger 3 by the second magnetic valve 8 and stores, the coolant quantity entering indoor evaporator on the one hand will reduce, and reduces the evaporating pressure of system.After the refrigerant that on the other hand heat exchanger is evaporated indoor flows through plate type heat exchanger 3, and the refrigerant of direct low-temp low-pressure of coming from the second magnetic valve 8 carries out heat exchange again, and its temperature and pressure then can reduce again.By the effect of this two aspect, finally make the pressure of inspiration(Pi) of system reduce, and then pressure at expulsion is also reduced, Tube Sheet of Heat Exchanger temperature also decreases.
2, as second set temperature value T2 < outdoor heat exchange organ pipe temperature T < the first set temperature value T1, then the second magnetic valve 8 cuts out, and system pressure maintains current state.
3, when outdoor heat exchange organ pipe temperature T≤the second set temperature value T2 being detected constantly, illustrate that Guan Wen is not high, the force value of system is lower, then the first magnetic valve 9 cuts out after opening the first setting-up time h1, and the liquid refrigerants before in reservoir will be got back in refrigeration system again.
When 4, heating, then carry out similar detection and action by indoor heat exchanger pipe warming thermometer bulb 6 and the first magnetic valve 9, the 3rd magnetic valve 7.By above control method, finally make the force value of air-conditioner set can remain under circumstances in suitable scope.
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.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.

Claims (9)

1. air-conditioner set, includes compressor, reservoir, indoor heat exchanger, outdoor heat exchanger, throttling arrangement, multistage refrigerant pipe and control device; Described compressor, reservoir, indoor heat exchanger, outdoor heat exchanger are connected by refrigerant pipe with throttling arrangement; Throttling arrangement is connected between indoor heat exchanger and outdoor heat exchanger; Reservoir connects the suction end of compressor; Described reservoir includes feed tube and drain pipe, and drain pipe connects the vapour liquid separator of compressor, and feed tube connects throttling arrangement; It is characterized in that, described air-conditioner set includes the first magnetic valve and the second magnetic valve, first magnetic valve is arranged on and connects on the drain pipe of reservoir and the refrigerant pipe of vapour liquid separator, and described second magnetic valve is arranged on and connects on the feed tube of reservoir and the refrigerant pipe of the throttling arrangement throttling port of export; Described air-conditioner set includes outdoor heat exchange organ pipe warming thermometer bulb; Described outdoor heat exchange organ pipe warming thermometer bulb, the first magnetic valve and the second magnetic valve are all electrically connected with control device, and the temperature information of control device receiving chamber external heat exchanger pipe warming thermometer bulb, controls the break-make of the first magnetic valve and the second magnetic valve.
2. air-conditioner set according to claim 1, it is characterized in that, for a kind of heat pump air conditioner unit, include plate type heat exchanger and cross valve, four ports of described plate type heat exchanger connect the feed tube of reservoir, drain pipe, cross valve and the second magnetic valve respectively; The feed tube of reservoir is communicated with the second magnetic valve, and the drain pipe of reservoir is communicated with cross valve.
3. air-conditioner set according to claim 1, is characterized in that, the vehicle repair major district of described outdoor heat exchange organ pipe warming thermometer bulb heat exchanger disposed in the outdoor.
4. air-conditioner set according to claim 1 and 2, it is characterized in that, include the 3rd magnetic valve, the described first end of the 3rd magnetic valve and the first end of the second magnetic valve are connected the two ends of throttling arrangement respectively, and described second end of the 3rd magnetic valve and the second end of the second magnetic valve are connected on the refrigerant pipe between the feed tube of reservoir and throttling arrangement jointly.
5. air-conditioner set according to claim 4, it is characterized in that, include indoor heat exchanger pipe warming thermometer bulb, described indoor heat exchanger pipe warming thermometer bulb and control device are electrically connected, the temperature information of Tube Sheet of Heat Exchanger warming thermometer bulb in control device receiving chamber, controls the break-make of the first magnetic valve and the 3rd magnetic valve.
6. air-conditioner set according to claim 5, is characterized in that, the vehicle repair major district of described indoor heat exchanger pipe warming thermometer bulb heat exchanger disposed in the interior.
7. according to the compress control method of the above-mentioned air-conditioner set in claim 1 to 6 described in any one, it is characterized in that, during refrigerating operaton, comprise the steps:
1), when control device detect: during outdoor heat exchange organ pipe temperature T >=the first set temperature value T1, the second magnetic valve is opened, the liquid refrigerants after throttling has sub-fraction to be entered in reservoir by the second magnetic valve to store;
2), when control device detect: during second set temperature value T2 < outdoor heat exchange organ pipe temperature T < the first set temperature value T1, then the second closed electromagnetic valve, air-conditioner set pressure maintains current state;
3), when control device detects: during outdoor heat exchange organ pipe temperature T≤the second set temperature value T2, then the second closed electromagnetic valve, the first magnetic valve cuts out after opening the first setting-up time h1.
8. the compress control method of air-conditioner set according to claim 7, it is characterized in that, after second magnetic valve is opened, the liquid refrigerants after throttling has sub-fraction to flow through plate type heat exchanger by the second magnetic valve, carries out heat exchange with the refrigerant that directly heat exchanger is evaporated indoor.
9. according to the compress control method of the air-conditioner set in claim 2 to 6 described in any one, it is characterized in that, during heating operation, comprise the steps:
A), when control device detect: during indoor heat exchanger pipe temperature t >=the 3rd set temperature value T3, the 3rd magnetic valve is opened, the second closed electromagnetic valve, the liquid refrigerants after throttling has sub-fraction to be entered in reservoir by the 3rd magnetic valve to store;
B), when control device detect: during the 4th set temperature value T4 < indoor heat exchanger pipe temperature t < the 3rd set temperature value T3, then the 3rd closed electromagnetic valve, air-conditioner set pressure maintains current state;
C), when control device detects: during indoor heat exchanger pipe temperature t≤the 4th set temperature value T4, then the second closed electromagnetic valve, the first magnetic valve cuts out after opening the second setting-up time h2.
CN201410120070.0A 2014-03-27 2014-03-27 air conditioning unit and pressure control method thereof Active CN104949297B (en)

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Publication number Priority date Publication date Assignee Title
CN106403348A (en) * 2016-11-28 2017-02-15 广州华凌制冷设备有限公司 Air conditioner and refrigeration control method thereof
WO2018094844A1 (en) * 2016-11-25 2018-05-31 广州华凌制冷设备有限公司 Air conditioning system and control method
CN109455057A (en) * 2018-10-22 2019-03-12 珠海格力电器股份有限公司 Air conditioner control method and device, storage medium and air conditioner
CN113587262A (en) * 2021-07-26 2021-11-02 珠海格力电器股份有限公司 Outdoor unit, air conditioning system and control method thereof

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CN106403348A (en) * 2016-11-28 2017-02-15 广州华凌制冷设备有限公司 Air conditioner and refrigeration control method thereof
WO2018094841A1 (en) * 2016-11-28 2018-05-31 广州华凌制冷设备有限公司 Air conditioner and refrigeration control method therefor
CN109455057A (en) * 2018-10-22 2019-03-12 珠海格力电器股份有限公司 Air conditioner control method and device, storage medium and air conditioner
CN109455057B (en) * 2018-10-22 2020-04-28 珠海格力电器股份有限公司 Air conditioner control method and device, storage medium and air conditioner
CN113587262A (en) * 2021-07-26 2021-11-02 珠海格力电器股份有限公司 Outdoor unit, air conditioning system and control method thereof
CN113587262B (en) * 2021-07-26 2022-07-08 珠海格力电器股份有限公司 Outdoor unit, air conditioning system and control method thereof

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