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CN1534242A - Variable capacity central air conditioner - Google Patents

Variable capacity central air conditioner Download PDF

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Publication number
CN1534242A
CN1534242A CNA031099068A CN03109906A CN1534242A CN 1534242 A CN1534242 A CN 1534242A CN A031099068 A CNA031099068 A CN A031099068A CN 03109906 A CN03109906 A CN 03109906A CN 1534242 A CN1534242 A CN 1534242A
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China
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compressor
air
conditioning
valve
conditioning system
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CNA031099068A
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张沈杰
张晶晶
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Abstract

A volume-variable heat pump type centralized air conditioner for saving energy features that on the basis of well-known heat pump type centralized air conditioner which is composed of frequency-fixed compressor, check valve, oil separator, gas-liquid separator, condenser, reverse valve, liquid storage tube, two expansion units and terminal evaporator, one or more additional frequency-fixed compressors are parallelly connected with original one, and all the compressors and the expanding throttle element are precisely controlled by CPU according to the actual load.

Description

The varying capacity central air-conditioning
Affiliated technical field
The present invention relates to a kind of pump type heat central air conditioning plant, especially can change capacity and realize energy-conservation central air-conditioning with load.
Background technology
At present, known heat pump class central air-conditioning by compressor, reversal valve, condenser, evaporimeter, gas-liquid separator, and surge drum, temperature sensor, heating power expansion valve or capillary, controller etc. form main frame; Last auspicious the connecting to form of heating power expansion valve or capillary, evaporimeter, composition.This air-conditioning is realized the change of host capacity by the start and stop compressor, to adapt to the changes in demand method of load, increase the compressor start-stop time, the process that this compressor ceaselessly starts, stops, starting, stops, waste a large amount of electric energy, reduced the life-span of compressor.
In order to address this problem, Japan since the eighties with Application of frequency conversion technique with in the air-conditioning, be called convertible frequency air-conditioner, rose in 90 years and be applied in the concatermer central air-conditioning, convertible frequency air-conditioner changes input power of compressor frequency by frequency converter, reaches the change compressor rotary speed, the purpose of change of load, converter technique has solved above-mentioned compressor and has ceaselessly started, the problem that stops.Realized energy-conservationly well, solved the sometimes hot and sometimes cold problem of refrigerant direct evaporation system simultaneously.But Harmonious Waves in Power Systems that convertible frequency air-conditioner occurs thereupon and interference, frequency conversion control technique requires high and is subjected to problem such as external trans-corporation technical monopoly, make the cost of convertible frequency air-conditioner crouch height not down, particularly intelligent type frequency-conversion device and power model, China still can not produce, also must be all from Japanese import, the cost of variable-frequency central air conditioner can't further be reduced, meanwhile the nineties not the U.S. admittedly wheel company invented and a kind ofly be called the compressor of digital vortex and apply in the small-sized concatermer central air-conditioning, and this kind air-conditioning is magnetic valve of controller control and adopt the method for machinery that compressor of air conditioner internal compression chamber is separated to quit work after room temperature reaches design temperature.And the rotor of compressor and motor still work on, at this moment, motor is in Light Condition substantially, its power consumption accounts for rated load 20%, and therefore, this air-conditioning can solve the problem of the frequent start-stop of compressor electric motor, there are not harmonic wave and interference yet, can save the part energy, but this kind compressor unit capacity price is higher, and, except that full load, the power factor (PF) of compressor is all less, and when 50% load was following, the power of motor factor was very little especially, do not reached energy-saving effect this moment, and in certain zone, use this air-conditioning in a large number, and power system reactive power will be heightened, will influence the safety and the operation of this zone power system when serious.This method that changes host capacity that reaches with the sacrificial section electric energy, its fractional energy savings is lower, as when 30% loads, the power factor (PF) of compressor has only about 0.5, air-conditioning will have 70% time memory at 20% no-load current, have only 30% load to be in the peak efficiency state, therefore, air-conditioning will not reach energy-saving effect, its efficient even also lower than common fixed frequency air conditioner.
Summary of the invention
In order to overcome the deficiency of existing central air-conditioning waste electric energy, the manufacturing cost that get rid of the technology barriers of convertible frequency air-conditioner, humorous wave interference, additionally increases the frequency converter cost and increase for harmonic carcellation, avoid expensive, the low-power factor and the low energy-saving effect of digital vortex air-conditioning, the invention provides a kind of variable-displacement central air conditioning plant.The not only fixed such frequent start-stop of central air-conditioning frequently of this device, and waste electric energy, and do not have expensive, the low-power factor and the low energy-saving effect of the harmonic wave of convertible frequency air-conditioner and technological difficulties and digital vortex air-conditioning.When realizing that centralized air conditioning capacity and load are variable, energy-conservation well.
The present invention solves the technical scheme that its technical problem takes: adopt two and two above invariable frequency compressor 1a, 1b, 1c---be connected in parallel, check valve 2a, 2b, 2c---, oil eliminator 3, vapour liquid separator 4,4a, 4b, 4c---, condenser 5, reversal valve 6, liquid storage tube 7, expansion mechanism 8; Reach expansion mechanism 9a, 9b, 9c in terminal 10---, evaporimeter 13a, 13b, 13c---connect successively.Adopt CPU accurately to control the start and stop and the expansion mechanism 8 of each compressor in the air-conditioner host, 9a, 9b, 9c---aperture.When cooling condition, after indoor temperature reached setting, temperature sensor gave air-conditioning CPU with temperature signal, and stop wherein low capacity compressor by control after the accurate computing of CPU, turn down expansion mechanism 8 simultaneously, the compressor of larger capacity then runs well, to satisfy the base load demand.When indoor temperature and setting deviation, CPU accurately controls and opens less capacity compressor, opens big expansion mechanism 8 simultaneously, and the larger capacity compressor is normally operation still, goes round and begins again like this to form to circulate.Adopted a plurality of compressors by dried,, and be in continuous duty all the time by the base load of heap(ed) capacity compressor as air-conditioning.The minimum capacity compressor participates in regulating load all the time, has at least the load of 50-90% to be in the peak efficiency state like this, and the load of 10-30% is in the power consumption state of original known heat pump class simply connected air-conditioning.Make air conditioner load in adjustable extent, be in the high efficiency state.A large amount of energy savings when having realized the air-conditioning volume-variable.Air-conditioning whole energy rate reaches 15%-27%.
The effect that the present invention is useful is: can utilize existing invariable frequency compressor to produce the varying capacity central air-conditioning that can follow load variations, in volume-variable, realized good reduction effect, and in large, medium and small type system, equal effect is arranged all, particularly the mini-system of 2-30 horsepower can be made small central air conditioning by sharp cheap low capacity invariable frequency compressor.
Below in conjunction with embodiment and accompanying drawing foregoing invention is described further:
Fig. 1 is an air-cooled heat pump type hot and cold water central air conditioner system with 2 invariable frequency compressors.Be applicable to the central air conditioner system that changes between the load range 35% to 100%.The invariable frequency compressor capacity is set at 1a respectively less than 1b, and its main frame is by two invariable frequency compressor 1a, 1b, check valve 2a, 2b, oil eliminator 3, vapour liquid separator 4,4a, 4b, reversal valve 6, condenser 5, filter 20, expansion mechanism 8, filter 21, liquid storage tube 7, filter 22, expansion mechanism 9, filter 23, water-side heat 10, water pump 15 grades connect to form, and do not hold by motor-driven valve 12a, 12b, 12c---12X, fan coil 14a, 14b, 14c---14X reaches in the system of composition connections such as hot and cold water pipeline compressor 1a, the 1b steam drain is connected in parallel, and check valve 2a, 2b are established in outlet respectively; Compressor 1a, 1b steam drain and check valve 2a are provided with magnetic valve 16a between the 2b, 16b, magnetic valve 16a, the other end of 16b are through capillary 17a, and 17b is connected to compressor 1a, on the 1b inlet duct, compressor 1a oil balance port is connected to capillary 13a, and the outlet of capillary 13a is connected to the inlet of compressor 1b, and compressor 1b oil balance port is connected to capillary 13b, the outlet of capillary 13b is connected to the inlet of compressor 1a, and the capillary 11 on the oil drain out of oil eliminator 3 is connected to the inlet of compressor 1a.
When cooling condition, how many central air-conditioning CPU determines quantity and the order that compressor is opened in the main frame with the demand of cold according to what terminal fan coil was opened, expansion mechanism 8 standard-sized sheets, as invariable frequency compressor 1a, 1b, during unlatching, after indoor temperature reaches setting, temperature sensor gives air-conditioning CPU with temperature signal, and by after the accurate computing of CPU control fan coil turn down the dynamoelectric water valve aperture and reduce air quantity, when water-side heat 10 leaving water temperatures are lower than when setting in the machine, wherein low capacity compressor 1a of CPU control stopping, expansion mechanism 9 turns down aperture immediately, and the compressor 1b that another capacity is bigger then runs well.When indoor temperature is higher than design temperature, the accurate control of CPU has reached on the fan coil in room of design temperature the dynamoelectric water valve aperture and has strengthened air quantity, when water-side heat 10 leaving water temperatures are higher than when setting in the machine, open less capacity compressor, expansion mechanism 9 strengthens aperture simultaneously, larger capacity compressor 1b is normally operation still, goes round and begins again like this.
When heating condition, central air-conditioning CPU do not hold that fan coil opens according to indoor equally what determine quantity and the order that compressor is opened in the main frame with the demand of heat, expansion mechanism 9 standard-sized sheets, as invariable frequency compressor 1a, 1b, during unlatching, after indoor temperature reaches setting, temperature sensor gives air-conditioning CPU with temperature signal, and by controlling the fan coil dynamoelectric water valve aperture in the room that reaches design temperature after the accurate computing of CPU and reducing air quantity, when going out water temperature, water-side heat 10 is higher than when setting in the machine, stop wherein low capacity compressor 1a, expansion mechanism 8 turns down aperture, and the compressor 1b that another capacity is bigger then runs well.When indoor temperature is hanged down dried design temperature once more, CPU accurately controls and strengthens the dynamoelectric water valve aperture and strengthen the fan coil air quantity, when going out water temperature, water-side heat 10 is lower than when setting in the machine, open less capacity compressor, expansion mechanism 8 strengthens aperture, larger capacity compressor 1b is normally operation still, goes round and begins again like this and forms circulation.
In above-mentioned two kinds of operating modes, larger capacity compressor 1b is as base load, and less capacity compressor 1a is then as Load Regulation.Thereby realized that centralized air conditioning capacity is energy-conservation well when changing.
Fig. 2 be one have 3 invariable frequency compressors the direct vaporation-type concatermer of refrigerant central air conditioner system.Be applicable to the central air conditioner system that changes between the load range 15% to 100%.It is by invariable frequency compressor 1a, 1b, 1c, its capacity are set at 1a respectively less than 1b, and 1b is less than 1c, the exhaust of compressor is connected to check valve 2a respectively, 2b, 2c is connected with oil eliminator 3, and the outlet of oil eliminator 3 connects cross valve 6, and the outlet of cross valve 6 communicates with condenser 5, the other end process filter 20 of condenser 5, electric expansion valve 8, filter 21 communicates with liquid storage tube 7, liquid storage tube 7 outlets connect each and do not hold indoor machine evaporation 18a, 18b, the hydraulic fluid side filter 22a of 18c---18X, 22b, 22c,---22X, electric expansion valve 9a,, 9b, 8c,---9X, filter 23a, 23b, 23c,---23X, evaporimeter 18a, 18b, the gas side of 18c---18X is connected to cross valve 6 through pipeline, and be back to gas-liquid separator 4, form circulation.
Under cooling condition, when the terminal total load in indoor during greater than compressor 1b and 1c sum, compressor 1a, 1b, 1c put into operation, expansion mechanism 8 standard-sized sheets, after certain room temperature reaches setting, temperature sensor gives air-conditioning CPU with temperature signal, and is turned down expansion mechanism 9 apertures and air quantity in the end of certain room correspondence by control after the accurate computing of CPU, when the total load of end during less than 1b and 1c sum, stop a wherein compressor 1a, and two compressor 1b in addition, 1c then runs well.When required keep the required load of design temperature less or inactive any CPU will be according to workload demand control stopping wherein compressor 1b or compressor 1c when holding 1X, up to compressor 1b, 1c is all out of service, when being higher than design temperature once more, certain room indoor temperature controls expansion mechanism 9 apertures and air quantity in the end of opening big certain room correspondence after the accurate computing of CPU, big or when having new not end 18X to open when keeping the required load of design temperature, CPU will open wherein compressor 1a according to workload demand control, at this moment, larger capacity compressor 1b, 1c be normally operation still.Compressor 1a makes Load Regulation.
When indoor terminal total load added 1c greater than compressor 1a adds 1C less than 1b, compressor 1c made base load, and compressor 1a and 1c alternately regulate.
When indoor terminal total load added 1a greater than compressor 1C less than 1c, then compressor 1c made base load, and compressor 1a regulates.
When indoor terminal total load added 1a greater than compressor 1b less than 1b, then compressor 1b made base load, and compressor 1a regulates.
During less than 1b, compressor 1a, 1b alternately make base load to indoor terminal total load greater than compressor 1a, and compressor 1a and 1b alternately regulate.
Thereby realize that the air-conditioning capacity adds the 1c variable from adding 1b less than 1a to 1a.Simultaneously have only the compressor 1a of capacity minimum to make Load Regulation in adjustment process all the time, other compressors are made base load, have realized in the course of work comprehensively energy-conservation.
During heating condition, can realize large-scale energy adjustment and energy-conservation equally.
Fig. 3 is a wind pipe type heat pump central air conditioner system with 3 invariable frequency compressors.Be applicable to the central air conditioner system that changes between the load range 15% to 100%.It is by invariable frequency compressor 1a, 1b, 1c, its capacity is set at 1a respectively less than 1b, and 1b is less than 1c, and the exhaust of compressor is connected to check valve 2a respectively, 2b, 2c is connected with oil eliminator 3, the outlet of oil eliminator 3 connects cross valve 6, the outlet of cross valve 6 communicates with condenser 5, and the other end of condenser 5 is through filter 20, electric expansion valve 8, filter 21 communicates with liquid storage tube 7, liquid storage tube 7 outlets connect the hydraulic fluid side filter 22 of not holding indoor airduct evaporimeter 19, electric expansion valve 9, filter 23, the gas side of evaporimeter 19 is connected to cross valve 6 through pipeline, and be back to gas-liquid separator 4, form circulation, air-valve 24a, 24b, 24c,---24X, blower fan 25, airduct 26, air port 27a, 27b, 27c---27X forms terminal another part.
Under cooling condition, as indoor terminal air port 27a, 27b, 27c---total load during greater than compressor 1b and 1c sum, compressor 1a, 1b, 1c put into operation, expansion mechanism 8 standard-sized sheets, after temperature reaches setting in certain room, CPU control turns down the terminal stroke valve 24 of certain room correspondence, the air quantity of expansion mechanism 9 apertures and blower fan 25, when the total load in terminal air port during less than 1b and 1c sum, CPU stops a wherein compressor 1a with control, and two compressor 1b in addition, 1c then runs well.When required keep the required load of design temperature less or inactive any when not holding air port 26, CPU will stop wherein compressor 1b or compressor 1c according to workload demand control, up to compressor 1b, 1c is all out of service; The terminal stroke valve 24 of certain room correspondence is greatly opened in control after the accurate computing of CPU when certain room indoor temperature is higher than design temperature once more, the air quantity of expansion mechanism 9 apertures and blower fan 25, big or when having new not end air port 26 to open, CPU will open wherein compressor 1a according to workload demand control when keeping the required load of design temperature.At this moment, still normally operation of larger capacity compressor 1b, 1c.Compressor 1a makes Load Regulation.When having new air port to open in indoor temperature is higher than design temperature once more or holds, CPU will according to how many accurate control unlatching compressor 1a of temperature deviation and required load, and larger capacity compressor 1b, 1c be normally operation still.At this moment, compressor 1b, 1c are as base load, and compressor 1a is as Load Regulation.
When indoor terminal total load added 1c greater than compressor 1a adds 1C less than 1b, compressor 1c made base load, and compressor 1a and 1c alternately regulate.
When indoor terminal total load added 1a greater than compressor 1C less than 1c, then compressor 1c made base load, and compressor 1a regulates.
When indoor terminal total load added 1a greater than compressor 1b less than 1b, then compressor 1b made base load, and compressor 1a regulates.
During less than 1b, compressor 1a, 1b alternately make base load to indoor terminal total load greater than compressor 1a, and compressor 1a and 1b alternately regulate.
Thereby realize that the air-conditioning capacity adds the 1c variable from adding 1b less than 1a to 1a.Simultaneously in adjustment process, have only the compressor 1a of capacity minimum to make Load Regulation all the time, realized in the course of work comprehensively energy-conservation.
During heating condition, can realize large-scale energy adjustment and energy-conservation equally.
Invariable frequency compressor 1a Expansion mechanism 9c Magnetic valve 16b Filter 23
Invariable frequency compressor 1b Expansion mechanism 9X Magnetic valve 16c Filter 23a
Invariable frequency compressor 1c Water-side heat 10 Capillary 17a Filter 23b
Check valve 2b Capillary 11 Capillary 17b Filter 23c
Check valve 2b Motor-driven valve 12a Capillary 17c Filter 23X
Check valve 2c Motor-driven valve 12b Evaporimeter 18a Air-valve 24a
Oil eliminator 3 Motor-driven valve 12c Evaporimeter 18b Air-valve 24b
Vapour liquid separator 4 Motor-driven valve 12X Evaporimeter 18c Air-valve 24c
Vapour liquid separator 4a Capillary 13a Evaporimeter 18X Air-valve 24X
Vapour liquid separator 4b Capillary 13b Airduct evaporimeter 19 Blower fan 25
Vapour liquid separator 4c Capillary 13c Filter 20 Air port 26a
Condenser 5 Fan coil 14a Filter 21 Air port 26a
Reversal valve 6 Fan coil 14b Filter 22 Air port 26a
Liquid storage tube 7 Fan coil 14c Filter 22a Air port 26a
Expansion mechanism 8 Fan coil 14X Filter 22b Airduct 27
Expansion mechanism 9a Water pump 15 Filter 22c
Expansion mechanism 9b Magnetic valve 16 Filter 22X

Claims (6)

1, varying capacity central air-conditioning, in air-conditioning system, invariable frequency compressor 1, check valve 2, oil eliminator 3, vapour liquid separator 4, condenser 5, reversal valve 6, liquid storage tube 7, expansion mechanism 8 is formed main frame and terminal expansion mechanism 9, and evaporimeter connects successively, it is characterized by: the main frame of air-conditioning system has at least two compressors to form, itself and other suction port of compressor is connected in parallel, and compressor steam drain and other compressor steam drains are connected in parallel, and the oil balance tube outlet capillary of each compressor is connected to the inlet of vapour liquid separator 4 each compressor of outlet.The terminal indoor switch parallel connection of each of air-conditioning system links to each other with the main frame of air-conditioning system.
2, varying capacity central air-conditioning according to claim 1 is characterized by: each compressor steam drain of the main frame of air-conditioning system all is provided with the check valve by the circulation of compressor steam discharge direction, can not establish bypass solenoid valve between each compressor steam drain and check valve; Or when being provided with bypass solenoid valve, the other end of magnetic valve is connected on the compressor inlet duct after must establishing capillary, and perhaps vapour liquid separator before the compressor is perhaps on the inlet duct of vapour liquid separator.
3, varying capacity central air-conditioning according to claim 1, it is characterized by: the exhaust of air-conditioning system main frame compressor links to each other with oil eliminator behind check valve, the oil drain out of gs-oil separator connects capillary, and outlet capillaceous is connected on the air entry pipeline of compressor.
4, varying capacity central air-conditioning according to claim 1 is characterized by: the capacity of each compressor of main frame of air-conditioning system can equate; When the capacity of compressor was unequal, the base load of preferentially doing that its capacity is bigger was used, and the less preferential work of capacity is regulated load and used.
5, varying capacity central air-conditioning according to claim 1 is characterized by: air-conditioning system is not held can be by one or more wind pipe type evaporimeters, perhaps by one or more cold and hot ability of swimming heat exchangers; Perhaps be made up of one or more direct vaporation-type evaporimeters, the restricting element 9 that enters evaporimeter is electric expansion valve, and one 100 purpose filter has been gone here and there at the two ends of electric expansion valve respectively.
6, varying capacity central air-conditioning according to claim 1 is characterized by: the gas-liquid separator of the main frame of air-conditioning system is share by each compressor or each compressor independently uses or share a gas-liquid separator when each compressor independently uses again.
CNA031099068A 2003-04-02 2003-04-02 Variable capacity central air conditioner Pending CN1534242A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100406809C (en) * 2004-10-12 2008-07-30 株式会社日立制作所 Air conditioning system
CN101063567B (en) * 2006-04-27 2011-05-11 海尔集团公司 Multiple air-conditioning unit pipe device
CN102384555A (en) * 2011-11-30 2012-03-21 江苏永昇空调有限公司 Full fresh air heat pump type constant temperature and constant humidity air conditioning system
CN102472519A (en) * 2009-11-13 2012-05-23 三菱重工业株式会社 Heat source system
CN102778067A (en) * 2012-08-06 2012-11-14 大连三洋压缩机有限公司 Cooling system of variable frequency vortex parallel connection machine set and operating method thereof
CN103748421A (en) * 2011-06-29 2014-04-23 开利公司 Coordinated flow control
CN108716743A (en) * 2018-06-14 2018-10-30 广州徽电子科技有限公司 A kind of building air-conditioner equipment and its management method
CN109405283A (en) * 2018-12-05 2019-03-01 江苏天舒电器有限公司 A kind of accurate temperature controlling type heat pump hot blast stove system
CN109442753A (en) * 2018-12-05 2019-03-08 江苏天舒电器有限公司 A kind of accurate temperature controlling type heat pump Control System of Airheater and control method
CN111734614A (en) * 2020-06-03 2020-10-02 新奥数能科技有限公司 Operation optimization method and device for air compressor system
CN112460858A (en) * 2020-12-01 2021-03-09 珠海格力电器股份有限公司 Air conditioner
CN115419936A (en) * 2022-09-06 2022-12-02 珠海格力电器股份有限公司 Floor heating control method and device and floor heating

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100406809C (en) * 2004-10-12 2008-07-30 株式会社日立制作所 Air conditioning system
CN101063567B (en) * 2006-04-27 2011-05-11 海尔集团公司 Multiple air-conditioning unit pipe device
CN102472519B (en) * 2009-11-13 2014-07-30 三菱重工业株式会社 Heat source system
CN102472519A (en) * 2009-11-13 2012-05-23 三菱重工业株式会社 Heat source system
US10060646B2 (en) 2011-06-29 2018-08-28 Carrier Corporation Coordinated flow control
CN103748421A (en) * 2011-06-29 2014-04-23 开利公司 Coordinated flow control
CN103748421B (en) * 2011-06-29 2016-08-31 开利公司 The method and system that coordinatograph flowing in heat exchanger system controls
US9726393B2 (en) 2011-06-29 2017-08-08 Carrier Corporation System for coordinated flow control of fluids through a heat exchanger
CN102384555A (en) * 2011-11-30 2012-03-21 江苏永昇空调有限公司 Full fresh air heat pump type constant temperature and constant humidity air conditioning system
CN102778067A (en) * 2012-08-06 2012-11-14 大连三洋压缩机有限公司 Cooling system of variable frequency vortex parallel connection machine set and operating method thereof
CN102778067B (en) * 2012-08-06 2014-08-27 大连三洋压缩机有限公司 Cooling system of variable frequency vortex parallel connection machine set and operating method thereof
CN108716743A (en) * 2018-06-14 2018-10-30 广州徽电子科技有限公司 A kind of building air-conditioner equipment and its management method
CN109442753A (en) * 2018-12-05 2019-03-08 江苏天舒电器有限公司 A kind of accurate temperature controlling type heat pump Control System of Airheater and control method
CN109405283A (en) * 2018-12-05 2019-03-01 江苏天舒电器有限公司 A kind of accurate temperature controlling type heat pump hot blast stove system
CN109405283B (en) * 2018-12-05 2023-05-23 江苏天舒电器有限公司 Accurate temperature control type heat pump hot blast stove system
CN111734614A (en) * 2020-06-03 2020-10-02 新奥数能科技有限公司 Operation optimization method and device for air compressor system
CN111734614B (en) * 2020-06-03 2022-04-26 新奥数能科技有限公司 Operation optimization method and device for air compressor system
CN112460858A (en) * 2020-12-01 2021-03-09 珠海格力电器股份有限公司 Air conditioner
CN112460858B (en) * 2020-12-01 2022-03-18 珠海格力电器股份有限公司 Air conditioner
CN115419936A (en) * 2022-09-06 2022-12-02 珠海格力电器股份有限公司 Floor heating control method and device and floor heating
CN115419936B (en) * 2022-09-06 2024-08-23 珠海格力电器股份有限公司 Floor heating control method, control device and floor heating

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