CN110440420A - A kind of control method of the electric expansion valve of module water dispenser - Google Patents

A kind of control method of the electric expansion valve of module water dispenser Download PDF

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Publication number
CN110440420A
CN110440420A CN201910703094.1A CN201910703094A CN110440420A CN 110440420 A CN110440420 A CN 110440420A CN 201910703094 A CN201910703094 A CN 201910703094A CN 110440420 A CN110440420 A CN 110440420A
Authority
CN
China
Prior art keywords
expansion valve
electric expansion
temperature
aperture
superheat
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
Application number
CN201910703094.1A
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Chinese (zh)
Inventor
陈永鑫
刘华栋
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.)
Guangdong Chigo Heating and Ventilation Equipment Co Ltd
Original Assignee
Guangdong Chigo Heating and Ventilation Equipment Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guangdong Chigo Heating and Ventilation Equipment Co Ltd filed Critical Guangdong Chigo Heating and Ventilation Equipment Co Ltd
Priority to CN201910703094.1A priority Critical patent/CN110440420A/en
Publication of CN110440420A publication Critical patent/CN110440420A/en
Pending legal-status Critical Current

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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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46—Improving electric energy efficiency or saving
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • 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
    • F24F11/64—Electronic processing using pre-stored data
    • 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
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • 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
    • F24F2140/20—Heat-exchange fluid temperature

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses a kind of control methods of the electric expansion valve of module water dispenser, practical degree of superheat SH is determined based on the difference between suction temperature TH and leaving water temperature T2, in the aperture adjusting stage, according to real-time detection to suction temperature Th and the leaving water temperature T2 that arrives of real-time detection, and practical degree of superheat SH is determined to calculate by the difference between suction temperature TH and leaving water temperature T2, wherein, an aperture adjustment amount is selected according to the size of the difference relationship between practical degree of superheat SH and scheduled target superheat degree SH target is corresponding, and the aperture based on selected aperture adjustment amount corresponding adjustment electric expansion valve on the basis of initial opening, and an aperture adjustment amount is selected according to the size of the difference relationship between practical degree of superheat SH and scheduled target superheat degree SH target is corresponding, to realize Dynamic regulation function is carried out to the aperture of electric expansion valve, the aperture of the electric expansion valve of the application is changed and dynamic regulation by water temperature, and reaction is rapid in time.

Description

A kind of control method of the electric expansion valve of module water dispenser
Technical field
The present invention relates to the technical fields of air-conditioning system, refer in particular to a kind of controlling party of the electric expansion valve of module water dispenser Method.
Background technique
Module water dispenser system just enters Chinese market from the eighties in last century, and convenient, control is expanded by it freely, efficiently Energy conservation is easily installed the advantages that maintenance, occupies critical role in Market of Central Air-conditioning quickly.
Module water dispenser systems operating range is very broad, refrigeration can be run in -5 DEG C -48 DEG C of range, heating can - It is run under 15 DEG C -30 DEG C of environment temperature.Such wide range of operation, needs extremely strong capacity regulating ability.In addition, module Water dispenser set of system can connect more interior machines, and more interior machines individually can be controlled freely, so that interior machine load variations are very big.With Upper operation characteristic determines the capacity regulating characteristic that module water dispenser needs to have wide scope.
The capacity regulating of module machine system is mainly the control exported by compressor, electric expansion valve to system refrigerant stream The accurate control of amount, and outer rotation speed of fan accurately control to realize with system loading variation.
By accurately controlling electronic expansion valve opening control, the accurate control of system cold medium flux can enable system Effect is higher, and operational reliability is also higher.
The common control method of existing module water dispenser refrigeration mode are as follows:
(1) subregion is carried out according to outdoor environment temperature and water temperature, different subregions correspond to different electronic expansion valve openings.The control Although method very simple, easy to accomplish, exist following insufficient: 1. since subregion is more, determines that the electronics of each subregion is swollen Swollen valve opening, which requires to do experiment, goes to determine, requires a great deal of time, time-consuming and laborious.2. according to the fixed electronic expansion of subregion Valve opening, it cannot be guaranteed that system cold medium flux inside entire subregion all close to best, the efficiency and reliability of system significantly under Drop.3. zonal control effect failure, system performance and reliability can not all protect when abnormal such as blocking occurs in system pipeline Card.
(2) according to outdoor environment temperature and degree of superheat control (suction temperature-is steamed into temperature=setting value).The control method Although and guarantee reliability more more convenient than the above method exists following insufficient: by testing, under the control logic, protecting Under the premise of card system reliability (press does not return liquid), system performance off-target performance point farther out, influences user experience.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of strong applicability, reliable and stable, adjusting is timely Module water dispenser electric expansion valve control method.
In order to achieve the above purpose, the control method of the electric expansion valve of a kind of module water dispenser provided by the present invention, Control method has specifically included following steps:
S1. system starts, and is calculated based on environment temperature T4 this moment and determines the corresponding initial opening of electric expansion valve, subsequent electronics After expansion valve is kept for initial opening one section of time rating of constant operation, into the aperture adjusting stage；
S2. in the aperture adjusting stage, according to real-time detection to suction temperature Th and the leaving water temperature T2 that arrives of real-time detection, and Practical degree of superheat SH is determined to calculate by the difference between suction temperature TH and leaving water temperature T2, wherein according to the practical degree of superheat SH and scheduled target superheat degree SHTargetBetween size of the difference relationship select an aperture adjustment amount accordingly, and be based on institute The aperture of the aperture adjustment amount of selection corresponding adjustment electric expansion valve on the basis of initial opening.
Further, continuous divide has multi-step temperature range level in advance, and every level-one temperature range grade corresponding one default Fixed initial opening, wherein by calculating temperature range grade corresponding to monitored environment temperature T4, then adjust electronics Expansion valve runs one section of time rating with corresponding initial opening.
Further, the time rating is 3 minutes.
Further, at interval of one section of scheduled detection interval time to recalculate confirmation suction temperature TH and leaving water temperature Difference between T2, and new practical degree of superheat SH is calculated again.
Further, in step s 2, if practical degree of superheat SH and scheduled target superheat degree SHTargetBetween difference it is bigger, Then aperture adjustment amount is bigger.
Further, if practical degree of superheat SH and scheduled target superheat degree SHTargetBetween difference it is bigger, then detect interval Time is shorter.
Further, when practical degree of superheat SH is less than target superheat degree SHTargetWhen, enable electric expansion valve be based on aperture adjustment amount It is corresponding to reduce aperture.
Further, when practical degree of superheat SH is greater than target superheat degree SHTargetWhen, enable electric expansion valve be based on aperture adjustment amount It is corresponding to increase aperture.
It further, further include the exhaust for having the delivery temperature Tp set on compressor air-discharging end and for real-time monitoring compressor Temperature detecting unit, wherein in system operation, if the delivery temperature Tp of delivery temperature detection unit real-time monitoring is higher than When specified protection temperature value, then the aperture for adjusting and limiting electric expansion valve is forced.
Further, when delivery temperature Tp is higher than the first presetting protection temperature value, electric expansion valve reduction is forbidden to open Degree, until the delivery temperature Tp of real-time monitoring is lower than the dynamic tune for just making aperture after the first protection temperature value by step S2 again It is whole；When delivery temperature Tp is higher than the second presetting protection temperature value, pressure adjustment electric expansion valve to maximum opening, until The delivery temperature Tp of real-time monitoring is just adjusted by the dynamic that step S2 makees aperture again lower than the first protection temperature value；Described first Protect temperature value less than the second protection temperature value.
The present invention uses above-mentioned scheme, the beneficial effect is that: based between suction temperature TH and leaving water temperature T2 Difference determines practical degree of superheat SH, and according to practical degree of superheat SH and scheduled target superheat degree SHTargetBetween size of the difference Relationship selects an aperture adjustment amount accordingly, carries out dynamic regulation function, this Shen to the aperture of electric expansion valve to realize The aperture of electric expansion valve please is changed and dynamic regulation by water temperature, and reaction is rapid in time, the directly experience and energy conservation effect of user Fruit is more preferably.
Detailed description of the invention
Fig. 1 is the flow chart of the control method of embodiment.
Fig. 2 is the degree of superheat of embodiment and the correspondence diagram of aperture adjustment amount.
Specific embodiment
The present invention is further illustrated combined with specific embodiments below.
Referring to figure 1, in the present embodiment, a kind of control method of the electric expansion valve of module water dispenser, including with Environment temperature detection unit in detection outdoor environment temperature, is set to the suction temperature detection unit set on compressor return air end The leaving water temperature detection unit of case tube heat exchanger water outlet and be set to compressor air-discharging end and be used for real-time monitoring compressor Delivery temperature Tp delivery temperature detection unit, wherein environment temperature detection unit monitors to obtain environment temperature T4；Return air temperature Degree detection unit monitors to obtain suction temperature Th, and leaving water temperature detection unit monitors to obtain leaving water temperature T2.
In the present embodiment, specifically includes the following steps:
S1. system starts, and is calculated based on environment temperature T4 this moment and determines the corresponding initial opening of electric expansion valve, subsequent electronics After expansion valve is kept for initial opening one section of time rating of constant operation, into the aperture adjusting stage.
In step sl, continuous divide has multi-step temperature range level in advance, and every level-one temperature range grade is one corresponding Presetting initial opening, that is, as shown in the table: the present embodiment is by marking off six grades of temperature range grades continuously for being supervised The corresponding temperature range grade for selecting to meet of the environment temperature T4 of survey.
T4(DEG C of environment temperature) Initial opening Adjustable range
≥40 384 184-480
35≤T4 < 40 368 184-480
30≤T4 < 35 360 184-480
20≤T4 < 30 360 160-480
8≤T4 < 20 280 160-440
< 8 184 152-400
By calculating temperature range grade corresponding to monitored environment temperature T4, electric expansion valve is adjusted then with corresponding Initial opening run one section of time rating, wherein in order to make it easy to understand, for example: when the environment temperature T4 monitored be 32 DEG C, then Meet the temperature range grade of 30≤T4 <, 35 DEG C of this level-ones, corresponding electric expansion valve keeps the initial opening operation of 360P One section of time rating.In addition, the time rating of the present embodiment is 3 minutes, foot is reserved by being set with time rating The enough time allows each element of system to transit to normal operating condition by shutdown status, allows each element operation to be intended to normal State makes subsequent adjustment operation more accurate.
S2. in the aperture adjusting stage, the leaving water temperature that is arrived according to the suction temperature Th and real-time detection that real-time monitor T2, and determine practical degree of superheat SH(that is, practical degree of superheat SH to calculate by the difference between suction temperature TH and leaving water temperature T2 =suction temperature Th- leaving water temperature T2), wherein according to practical degree of superheat SH and scheduled target superheat degree SHTargetBetween difference Size relation selects an aperture adjustment amount accordingly, and based on selected aperture adjustment amount on the basis of initial opening The aperture of corresponding adjustment electric expansion valve.
In step s 2, the present embodiment is by being set with one section between the movement of adjustment twice for being provided with electric expansion valve Interval time is monitored, in order to which system in adjustment electric expansion valve there is time enough to make state adjustment, that is, at interval of one section Scheduled detection interval time is recalculated with recalculating the difference between confirmation suction temperature TH and leaving water temperature T2 To new practical degree of superheat SH, wherein the detection interval time of the present embodiment can be 40s, and also can be set as time parameter can Become, that is, if practical degree of superheat SH and scheduled target superheat degree SHTargetBetween difference it is bigger, then it is shorter to detect interval time； Those skilled in the art can make suitable time parameter setting according to actual needs, here without limitation.
In step s 2, if practical degree of superheat SH and scheduled target superheat degree SHTargetBetween difference it is bigger, then aperture Adjustment amount is bigger, wherein when practical degree of superheat SH is less than target superheat degree SHTargetWhen, enable electric expansion valve be based on aperture adjustment amount It is corresponding to reduce aperture；When practical degree of superheat SH is greater than target superheat degree SHTargetWhen, enable electric expansion valve be based on aperture adjustment amount It is corresponding to increase aperture.In order to make it easy to understand, the present embodiment passes through according to practical degree of superheat SH and target superheat degree SHTargetBetween Size of the difference relationship mark off multistage parameter area, so that the corresponding adjustment of system determines one aperture adjustment amount of selection, ginseng According to shown in attached drawing 2.
In SH-SHTargetWhen≤- 3, then it represents that practical degree of superheat SH is far below target value, needs the electricity suitably reduced at this time Sub- expansion valve opening, that is, the aperture adjustment amount defined at this time is -16P, and subsequent electric expansion valve subtracts on the basis of initial opening The aperture of small 16P.
As -3≤SH-SHTargetWhen≤- 1, then it represents that practical degree of superheat SH is lower than target value, the electricity that need at this time suitably reduce Sub- expansion valve opening, that is, the aperture adjustment amount defined at this time is -8P, and subsequent electric expansion valve subtracts on the basis of initial opening The aperture of small 8P.
As -1≤SH-SHTargetWhen≤1, then it represents that practical degree of superheat SH, which has been approached, reaches target value, electronic expansion at this time The aperture of valve can be remained unchanged or is adjusted with the aperture adjustment amount of very little, in order to make it easy to understand, set by this implementation When being within the scope of subparameter, the aperture of electric expansion valve can be remained unchanged.
As 1≤SH-SHTargetWhen≤3, then it represents that practical degree of superheat SH is lower than target value, the electronics that need at this time suitably increase Expansion valve opening, that is, the aperture adjustment amount defined at this time is 8P, and subsequent electric expansion valve increases 8P on the basis of initial opening Aperture.
In SH-SHTargetWhen >=3, then it represents that practical degree of superheat SH is far below target value, needs the electricity suitably increased at this time Sub- expansion valve opening, that is, the aperture adjustment amount defined at this time is 16P, and subsequent electric expansion valve increases on the basis of initial opening The aperture of big 16P.
In the present embodiment, in system operation, by combining the delivery temperature Tp of real-time monitoring to play to being The operating status of system carries out monitoring for protection, wherein if the delivery temperature Tp of delivery temperature detection unit real-time monitoring is higher than specified Protection temperature value when, then force adjust and limit electric expansion valve aperture, the present embodiment setting setting two class protection mode, It is provided with the first protection temperature value and the second protection temperature value that is, respectively corresponding, the first protection temperature value is less than the second protection temperature Angle value, the first protection temperature value are 100 DEG C, and the second protection temperature value is 108 DEG C.
Therefore, under first class of protection mode, when delivery temperature Tp is higher than the first presetting protection temperature value, that is, TP At >=100 DEG C, electric expansion valve is forbidden to reduce aperture, that is, the aperture of electric expansion valve at this time, which can only increase, to be further continued for Reduce, until the delivery temperature Tp of real-time monitoring is lower than after the first protection temperature value (that is, 100 DEG C of TP <) just again by step S2 Make the dynamic adjustment of aperture.
Under second class protection mode, when delivery temperature Tp is higher than the second presetting protection temperature value, that is, TP >=108 DEG C when, force adjustment electric expansion valve to maximum opening, that is, the aperture of electric expansion valve at this time is forced to adjust to maximum Value, no longer progress dynamic regulation, until the delivery temperature Tp of real-time monitoring is lower than after the first protection temperature value (that is, TP < 100 DEG C) just adjusted again by the dynamic that step S2 makees aperture.
In this way, when avoiding that aperture is too small or system pipeline is abnormal, and compressor exhaust temperature mistake is caused Failure that is high and causing system, ensure that the stability and reliability of system operation.
The application is required by determining practical degree of superheat SH based on the difference between suction temperature TH and leaving water temperature T2 Test volume substantially reduces, raising efficiency, meanwhile, the aperture of electric expansion valve is changed by water temperature and is adjusted, and reaction is rapid in time.
The embodiment of the above is only presently preferred embodiments of the present invention, not does limit in any form to the present invention System.Anyone skilled in the art utilizes the skill of the disclosure above without departing from the scope of the technical proposal of the invention Art content makes more possible variations and retouching to technical solution of the present invention, or modification is equivalent embodiment of the invention. Therefore all contents without departing from technical solution of the present invention, the equivalent equivalence changes that thinking according to the present invention is done should all be covered by In protection scope of the present invention.

Claims (10)

1. a kind of control method of the electric expansion valve of module water dispenser, it is characterised in that: control method has specifically included following step It is rapid:
S1. system starts, and is calculated based on environment temperature T4 this moment and determines the corresponding initial opening of electric expansion valve, subsequent electronics After expansion valve is kept for initial opening one section of time rating of constant operation, into the aperture adjusting stage；
S2. in the aperture adjusting stage, according to real-time detection to suction temperature Th and the leaving water temperature T2 that arrives of real-time detection, and Practical degree of superheat SH is determined to calculate by the difference between suction temperature TH and leaving water temperature T2, wherein according to the practical degree of superheat SH and scheduled target superheat degree SHTargetBetween size of the difference relationship select an aperture adjustment amount accordingly, and be based on institute The aperture of the aperture adjustment amount of selection corresponding adjustment electric expansion valve on the basis of initial opening.
2. a kind of control method of the electric expansion valve of module water dispenser according to claim 1, it is characterised in that: connect in advance Continuous division has multi-step temperature range level, the corresponding presetting initial opening of every level-one temperature range grade, wherein pass through Temperature range grade corresponding to monitored environment temperature T4 is calculated, adjusts electric expansion valve then with corresponding initial opening Run one section of time rating.
3. a kind of control method of the electric expansion valve of module water dispenser according to claim 2, it is characterised in that: the volume Fix time is 3 minutes.
4. a kind of control method of the electric expansion valve of module water dispenser according to claim 2, it is characterised in that: at interval of One section of scheduled detection interval time is counted again with recalculating the difference between confirmation suction temperature TH and leaving water temperature T2 Calculation obtains new practical degree of superheat SH.
5. a kind of control method of the electric expansion valve of module water dispenser according to claim 1, it is characterised in that: in step In S2, if practical degree of superheat SH and scheduled target superheat degree SHTargetBetween difference it is bigger, then aperture adjustment amount is bigger.
6. a kind of control method of the electric expansion valve of module water dispenser according to claim 4 or 5, it is characterised in that: if Practical degree of superheat SH and scheduled target superheat degree SHTargetBetween difference it is bigger, then it is shorter to detect interval time.
7. a kind of control method of the electric expansion valve of module water dispenser according to claim 5, it is characterised in that: work as reality Degree of superheat SH is less than target superheat degree SHTargetWhen, it enables electric expansion valve be based on aperture adjustment amount and reduces aperture accordingly.
8. a kind of control method of the electric expansion valve of module water dispenser according to claim 5, it is characterised in that: work as reality Degree of superheat SH is greater than target superheat degree SHTargetWhen, it enables electric expansion valve be based on aperture adjustment amount and increases aperture accordingly.
9. a kind of control method of the electric expansion valve of module water dispenser according to claim 1, it is characterised in that: further include There is the delivery temperature detection unit of the delivery temperature Tp set on compressor air-discharging end and for real-time monitoring compressor, wherein In In system operation, if the delivery temperature Tp of delivery temperature detection unit real-time monitoring is higher than specified protection temperature value, It then forces adjustment and limits the aperture of electric expansion valve.
10. a kind of control method of the electric expansion valve of module water dispenser according to claim 9, it is characterised in that: work as row When temperature degree Tp is higher than the first presetting protection temperature value, electric expansion valve is forbidden to reduce aperture, until the row of real-time monitoring Temperature degree Tp is just adjusted by the dynamic that step S2 makees aperture again lower than after the first protection temperature value；When delivery temperature Tp is higher than in advance When the second protection temperature value of setting, force adjustment electric expansion valve to maximum opening, until the delivery temperature Tp of real-time monitoring It is just adjusted again by the dynamic that step S2 makees aperture lower than the first protection temperature value；The first protection temperature value is protected less than second Protect temperature value.
CN201910703094.1A 2019-07-31 2019-07-31 A kind of control method of the electric expansion valve of module water dispenser Pending CN110440420A (en)

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Application Number Priority Date Filing Date Title
CN201910703094.1A CN110440420A (en) 2019-07-31 2019-07-31 A kind of control method of the electric expansion valve of module water dispenser

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Application Number Priority Date Filing Date Title
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Publication number Priority date Publication date Assignee Title
CN112984856A (en) * 2021-03-31 2021-06-18 广东积微科技有限公司 Electronic valve control system suitable for modular water machine and control method thereof
CN114322249A (en) * 2021-12-17 2022-04-12 宁波奥克斯电气股份有限公司 Exhaust pressure adjusting method and device of air conditioner and air conditioner

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CN107606830A (en) * 2017-09-05 2018-01-19 浙江正理生能科技有限公司 A kind of electric expansion valve adjusting method
JP2018132219A (en) * 2017-02-13 2018-08-23 株式会社富士通ゼネラル Air conditioning device
CN109668350A (en) * 2018-12-12 2019-04-23 广东华天成新能源科技股份有限公司 High stability heat pump system

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CN101852523A (en) * 2009-03-31 2010-10-06 海尔集团公司 Superheat degree control method and system for refrigeration circulation system
CN103743063A (en) * 2014-01-17 2014-04-23 苏州海特温控技术有限公司 Method of controlling electronic expansion valve during refrigeration of air conditioner
CN105674649A (en) * 2016-01-06 2016-06-15 广东芬尼科技股份有限公司 Control method for electronic expansion valve
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CN109668350A (en) * 2018-12-12 2019-04-23 广东华天成新能源科技股份有限公司 High stability heat pump system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112984856A (en) * 2021-03-31 2021-06-18 广东积微科技有限公司 Electronic valve control system suitable for modular water machine and control method thereof
CN114322249A (en) * 2021-12-17 2022-04-12 宁波奥克斯电气股份有限公司 Exhaust pressure adjusting method and device of air conditioner and air conditioner

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