CN109185976A - Multi-joint unit, its degree of supercooling control method, computer equipment and storage medium - Google Patents

Multi-joint unit, its degree of supercooling control method, computer equipment and storage medium Download PDF

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Publication number
CN109185976A
CN109185976A CN201811027444.9A CN201811027444A CN109185976A CN 109185976 A CN109185976 A CN 109185976A CN 201811027444 A CN201811027444 A CN 201811027444A CN 109185976 A CN109185976 A CN 109185976A
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CN
China
Prior art keywords
degree
supercooling
joint unit
machine
maximum difference
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
CN201811027444.9A
Other languages
Chinese (zh)
Inventor
刘华
戎耀鹏
刘群波
倪毅
许克
李龙飞
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.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
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 Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN201811027444.9A priority Critical patent/CN109185976A/en
Publication of CN109185976A publication Critical patent/CN109185976A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0003Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control 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
    • F24F11/84Control 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/88Electrical aspects, e.g. circuits

Abstract

The invention discloses a kind of multi-joint units, its degree of supercooling control method, computer equipment and storage medium.The degree of supercooling control method compares every difference for opening the evaporating temperature saturation temperature corresponding with suction pressure of compressor of interior machine, the degree of supercooling of refrigeration unit is adjusted according to maximum difference when refrigeration mode is run.The present invention makes the degree of supercooling of system be changed to the optimal value with system real-time change by definite value, prevents unit from occurring system degree of supercooling situation bigger than normal in short connecting leg, improves unit efficiency, reaches energy saving purpose.

Description

Multi-joint unit, its degree of supercooling control method, computer equipment and storage medium
Technical field
The present invention relates to air-conditioning technical field more particularly to a kind of multi-joint units, its degree of supercooling controlling party
Method, computer equipment and storage medium.
Background technique
Under refrigeration mode, refrigerant needs to keep certain degree of supercooling after condensation, not only can make two after throttling The refrigerant of phase state can guarantee lower mass dryness fraction, improve system energy efficiency;Refrigerant can also be enable to pass in connecting tube simultaneously Defeated farther and while throttling is not in abnormal sound.
In multi-joint unit, longest connecting tube and maximum one supercooling of drop setting that system allows generally according to unit Angle value, and user's actual installation situation is indefinite, connecting tube and drop are also less able to reach the limiting case, even if occurring this Situation, when the longest indoor unit of connecting tube is closed, which is also not need so big degree of supercooling, therefore for multi-connected machine System, the selection of optimal degree of supercooling are to open situation real-time change according to installation situation and indoor unit.
Therefore, when multi-line system connecting tube is shorter, degree of supercooling, and the multi-connected machine for installing how to be determined How system confirms that degree of supercooling is technical problem urgently to be resolved in the industry according to the case where opened interior machine and quantity is different.
Summary of the invention
The present invention proposes a kind of multi-joint unit, its degree of supercooling control method, computer equipment and storage medium, it is therefore an objective to make Multi-joint unit is run in optimal degree of supercooling operating condition, improves efficiency.
The technical solution adopted by the present invention is that proposing a kind of degree of supercooling control method of multi-joint unit, this method is multi-joint When unit refrigerating operaton, judge currently to have turned on machine in the longest connecting tube in interior machine, it is true according to machine in the longest connecting tube The degree of supercooling of fixed multi-joint unit.
Preferably, the step of judging machine in longest connecting tube includes: to compare every evaporating temperature and compression for opening interior machine The difference of the corresponding saturation temperature of machine air entry pressure, using the interior machine of maximum difference as machine in longest connecting tube.
Preferably, the degree of supercooling of multi-joint unit is adjusted by the aperture of dynamic regulation subcooler electric expansion valve.
In one embodiment, degree of supercooling control method proposed by the present invention the following steps are included:
When step 1. refrigerating operaton, the corresponding saturation temperature Tc of recording compressed machine air entry pressure and every have turned on interior machine Evaporating temperature TEvaporation
Step 2. calculates every evaporating temperature T for opening interior machineEvaporationThe difference of saturation temperature Tc corresponding with compressor air suction mouth pressure Value △ T:
Step 3. judges maximum difference Max △ T, and the aperture of subcooler electric expansion valve is adjusted according to maximum difference.
The invention also includes steps 4 to readjust multi-joint unit when any interior machine has unlatching or shutdown acts Degree of supercooling.
Preferably, step 3 includes:
When the absolute value of maximum difference is less than threshold alpha, Max △ T < α, the degree of supercooling of multi-joint unit takes A value;
When the absolute value of maximum difference is more than or equal to threshold alpha, when being less than or equal to threshold value beta, Max △ T ∈ [α, β], multi-joint unit Degree of supercooling take B value;
When the absolute value of maximum difference is greater than threshold value beta, Max △ T > β, the degree of supercooling of multi-joint unit takes C value;
Wherein, A, B and C are setting value.
The present invention also proposes a kind of multi-joint unit, described multi-joint including the interior machine that a subcooler and Duo Tai are arranged in parallel Unit has used above-mentioned degree of supercooling control method.
The multi-joint unit includes:
Pressure sensor, for acquiring compressor air suction mouth pressure;
Temperature sensor, for acquiring every evaporating temperature T for having turned on interior machineEvaporation
Computing module, for calculating every evaporating temperature T for opening interior machineEvaporationSaturation temperature corresponding with compressor air suction mouth pressure The difference △ T of Tc is spent, and obtains maximum difference Max △ T:
Adjustment module, for adjusting the aperture of subcooler electric expansion valve according to maximum difference.
The present invention also proposes a kind of computer equipment, including memory, processor and storage on a memory and can located The computer program run on reason device, the processor realize above-mentioned degree of supercooling control method when executing described program.
The present invention also proposes a kind of storage medium comprising computer executable instructions, the storage medium executable instruction When being subsequently can by computer device operation for executing above-mentioned degree of supercooling control method.
Compared with prior art, the beneficial effects of the present invention are: to be changed to the degree of supercooling of system by definite value real-time with system The optimal value of variation prevents unit from occurring system degree of supercooling situation bigger than normal in short connecting leg, improves unit efficiency, and reach Energy saving purpose.
Detailed description of the invention
Fig. 1 is the system schematic of multi-joint unit;
Fig. 2 is machine connecting tube schematic diagram in multi-joint unit;
Fig. 3 is degree of supercooling automatic control flow chart figure.
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawings and examples.
When refrigerant flows in pipeline, since there are on-way resistance and drops, refrigerant pressure will lead in flow process In declined, and then it is confidential higher than in short connecting leg to lead to the evaporating temperature of machine in long connecting leg, and connecting leg is longer, drop is bigger, This influence is more obvious.
Fig. 1 is the system schematic of multi-joint unit.System includes compressor 1, four-way valve 2, outdoor heat exchanger 3, subcooler 4, the throttling set V built in the more indoor unit S and each interior machine by pipeline connection (the present embodiment uses expansion valve). When refrigerating operaton, the high temperature and high pressure gas that compressor 1 is discharged is multi-joint to interior by subcooler 4 after the condensation of outdoor heat exchanger 3 In interior machine, the re-evaporation after the throttling set throttling built in each interior machine eventually passes back to compressor air suction pipeline.Wherein it is subcooled Device includes that a heat exchanger 41 and throttling set 42(the present embodiment use expansion valve), condensed refrigerant is divided into two in subcooler Road, part refrigerant exchange heat after throttling set with main road refrigerant, are then return to compressor air suction mouth, and main road refrigerant passes through Certain degree of supercooling is obtained after crossing heat exchange, the expansion valve opening by adjusting subcooler realizes the supercooling of adjustment main road refrigerant Degree.
As shown in Fig. 2, multi-joint unit includes being placed on the outdoor unit 3 and four indoor units S1, S2, S3, S4 that height is H.From It can be seen that the connection length of tube L longest of indoor unit S4 in figure.In the prior art, the longest that system allows generally according to unit connects A supercooling angle value is arranged in adapter tube L.It is not that every interior machine all works at the same time in practice, when the longest interior machine S4 of connecting tube is closed When closing, if system still presses longest connecting tube setting degree of supercooling, degree of supercooling is bigger than normal, and energy consumption is relatively high.
The present invention proposes that a kind of adaptive degree of supercooling control method, this method actually use and run feelings according to unit Condition compares every evaporating temperature saturation temperature corresponding with compressor air suction mouth pressure for opening interior machine, judges currently to have opened Machine in the longest connecting leg in interior machine is opened, the system of multi-joint unit is subcooled in the aperture of the electric expansion valve of dynamic regulation subcooler Degree remains at an optimal value.
As shown in figure 3, adaptive degree of supercooling control method proposed by the present invention specifically includes the following steps:
Step 1. is in refrigerating operaton, the corresponding saturation temperature Tc of recording compressed machine air entry pressure, and each has turned on interior The evaporating temperature T of machineEvaporation.Evaporating temperature herein be enter evaporator after interior machine throttle valve enter tube temperature degree.
Step 2. calculates the evaporating temperature T of every interior machineEvaporationThe difference of saturation temperature Tc corresponding with compressor air suction mouth pressure Value △ T:
TEvaporation 1-Tc ,TEvaporation 2-Tc ,TEvaporation 3- Tc ... ..., TEvaporate n-Tc;
Step 3. judges the Max △ T of maximum difference, and the optimal degree of supercooling of multi-joint unit is arranged according to maximum difference.
Step 4. is in system operation, when any interior machine has unlatching or shutdown acts, after a period of time, Such as after X minutes, return step 1 readjusts the optimal degree of supercooling of system.
In the step 3, the degree of supercooling for adjusting multi-joint unit is executed according to following rule:
As the absolute value Max △ T < α of maximum difference, system degree of supercooling takes A value;
As absolute value Max △ T ∈ [α, the β] of maximum difference, system degree of supercooling takes B value;
As the absolute value Max △ T > β of maximum difference, system degree of supercooling takes C value.
Above-mentioned threshold alpha, β, A, B, C and X according to different operation occasions, caliber, refrigerant flow rate, unit capacity size etc. because Element obtains, and is generally determined by experiment in actual motion.
The present invention also proposes a kind of air conditioning multi-couple unit, described including the interior machine that a subcooler and Duo Tai are arranged in parallel Multi-joint unit has used above-mentioned degree of supercooling control method.
The combined air conditioners refrigeration unit includes:
Pressure sensor, for acquiring compressor air suction mouth pressure;
Temperature sensor, for acquiring every evaporating temperature T for having turned on interior machineEvaporation
Computing module, for calculating every evaporating temperature T for opening interior machineEvaporationSaturation temperature corresponding with compressor air suction mouth pressure The difference △ T of Tc is spent, and judges maximum difference Max △ T:
Adjustment module, for adjusting the aperture of subcooler electric expansion valve according to maximum difference.
The present invention also proposes a kind of computer equipment, including memory, processor and storage on a memory and can located The computer program run on reason device, the processor realize above-mentioned degree of supercooling control method when executing described program.
The present invention also proposes a kind of storage medium comprising computer executable instructions, the storage medium executable instruction When being subsequently can by computer device operation for executing above-mentioned degree of supercooling control method.
Degree of supercooling control method proposed by the present invention, when interior machine has unlatching or shutdown to act, all to degree of supercooling into Row adjustment, makes the degree of supercooling of system be changed to the optimal value with system real-time change by definite value, prevents unit appearance in short connecting leg System degree of supercooling situation bigger than normal, improves unit efficiency, and reaches energy saving purpose.
Above-described embodiment is merely to illustrate a specific embodiment of the invention.It should be pointed out that for the general of this field For logical technical staff, without departing from the inventive concept of the premise, several deformations and variation can also be made, these deformations and Variation all should belong to protection scope of the present invention.

Claims (10)

1. a kind of degree of supercooling control method of multi-joint unit, which is characterized in that in multi-joint unit refrigerating operaton, judge current Machine in the longest connecting tube in interior machine is had turned on, the degree of supercooling of multi-joint unit is determined according to machine in the longest connecting tube.
2. degree of supercooling control method as described in claim 1, which is characterized in that the step of judging machine in longest connecting tube wraps It includes: the difference of the evaporating temperature saturation temperature corresponding with suction pressure of compressor of machine in every unlatching of comparison, by maximum difference Interior machine as machine in longest connecting tube.
3. degree of supercooling control method as described in claim 1, which is characterized in that pass through dynamic regulation subcooler electric expansion valve Aperture adjust the degree of supercooling of multi-joint unit.
4. degree of supercooling control method as described in claim 1, which comprises the following steps:
When step 1. refrigerating operaton, the corresponding saturation temperature Tc of recording compressed machine air entry pressure and every have turned on interior machine Evaporating temperature TEvaporation
Step 2. calculates every evaporating temperature T for opening interior machineEvaporationThe difference of saturation temperature Tc corresponding with compressor air suction mouth pressure Value △ T:
Step 3. judges maximum difference Max △ T, and the aperture of subcooler electric expansion valve is adjusted according to maximum difference.
5. degree of supercooling control method as claimed in claim 4, which is characterized in that further include step 4, when any interior machine has When unlatching or shutdown act, the degree of supercooling of multi-joint unit is readjusted.
6. degree of supercooling control method as claimed in claim 4, which is characterized in that the step 3 includes:
When the absolute value of maximum difference is less than threshold alpha, Max △ T < α, the degree of supercooling of multi-joint unit takes A value;
When the absolute value of maximum difference is more than or equal to threshold alpha, when being less than or equal to threshold value beta, Max △ T ∈ [α, β], multi-joint unit Degree of supercooling takes B value;
When the absolute value of maximum difference is greater than threshold value beta, Max △ T > β, the degree of supercooling of multi-joint unit takes C value;
Wherein, α, β, A, B and C are setting value.
7. a kind of multi-joint unit, the interior machine being arranged in parallel including a subcooler and Duo Tai, which is characterized in that the multi-joint unit Degree of supercooling control method described in any one of claims 1-6 has been used in refrigerating operaton.
8. multi-joint unit as claimed in claim 7 characterized by comprising
Pressure sensor, for acquiring compressor air suction mouth pressure;
Temperature sensor, for acquiring every evaporating temperature T for having turned on interior machineEvaporation
Computing module, for calculating every evaporating temperature T for opening interior machineEvaporationSaturation temperature corresponding with compressor air suction mouth pressure The difference △ T of Tc is spent, and obtains maximum difference Max △ T:
Adjustment module, for adjusting the aperture of subcooler electric expansion valve according to maximum difference.
9. a kind of computer equipment including memory, processor and stores the meter that can be run on a memory and on a processor Calculation machine program, which is characterized in that the processor realizes degree of supercooling described in any one of claims 1-6 when executing described program Control method.
10. a kind of storage medium comprising computer executable instructions, the storage medium executable instruction is at by computer The described in any item degree of supercooling control methods of 1-6 are required for perform claim when managing device operation.
CN201811027444.9A 2018-09-04 2018-09-04 Multi-joint unit, its degree of supercooling control method, computer equipment and storage medium Pending CN109185976A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811027444.9A CN109185976A (en) 2018-09-04 2018-09-04 Multi-joint unit, its degree of supercooling control method, computer equipment and storage medium

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Application Number Priority Date Filing Date Title
CN201811027444.9A CN109185976A (en) 2018-09-04 2018-09-04 Multi-joint unit, its degree of supercooling control method, computer equipment and storage medium

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1609529A (en) * 2003-10-16 2005-04-27 Lg电子株式会社 System and method for controlling temperature of refrigerant in air conditioner
CN1755302A (en) * 2004-10-01 2006-04-05 三星电子株式会社 Refrigeration circulating system and air conditioner
JP2012122677A (en) * 2010-12-09 2012-06-28 Mitsubishi Electric Corp Air conditioner
CN103162385A (en) * 2013-04-02 2013-06-19 四川长虹电器股份有限公司 Device and method of adjusting electronic expansion valve of refrigeration equipment
CN103411291A (en) * 2013-08-30 2013-11-27 海信(山东)空调有限公司 Expansion valve injection control method and system
CN104748321A (en) * 2013-12-30 2015-07-01 海尔集团公司 Air conditioning system applicable to high-altitude areas and control method of air conditioning system
CN104879939A (en) * 2014-02-28 2015-09-02 海尔集团公司 Air-conditioning system
CN107062580A (en) * 2017-03-21 2017-08-18 珠海格力电器股份有限公司 It is a kind of to reduce the control method and multi-gang air-conditioner of noise of indoor unit of air conditioner

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1609529A (en) * 2003-10-16 2005-04-27 Lg电子株式会社 System and method for controlling temperature of refrigerant in air conditioner
CN1755302A (en) * 2004-10-01 2006-04-05 三星电子株式会社 Refrigeration circulating system and air conditioner
JP2012122677A (en) * 2010-12-09 2012-06-28 Mitsubishi Electric Corp Air conditioner
CN103162385A (en) * 2013-04-02 2013-06-19 四川长虹电器股份有限公司 Device and method of adjusting electronic expansion valve of refrigeration equipment
CN103411291A (en) * 2013-08-30 2013-11-27 海信(山东)空调有限公司 Expansion valve injection control method and system
CN104748321A (en) * 2013-12-30 2015-07-01 海尔集团公司 Air conditioning system applicable to high-altitude areas and control method of air conditioning system
CN104879939A (en) * 2014-02-28 2015-09-02 海尔集团公司 Air-conditioning system
CN107062580A (en) * 2017-03-21 2017-08-18 珠海格力电器股份有限公司 It is a kind of to reduce the control method and multi-gang air-conditioner of noise of indoor unit of air conditioner

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