CN116007146A - Control method of air conditioner - Google Patents
Control method of air conditioner Download PDFInfo
- Publication number
- CN116007146A CN116007146A CN202211695302.6A CN202211695302A CN116007146A CN 116007146 A CN116007146 A CN 116007146A CN 202211695302 A CN202211695302 A CN 202211695302A CN 116007146 A CN116007146 A CN 116007146A
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- Prior art keywords
- air conditioner
- temperature
- winding
- controller
- resistance
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000004804 winding Methods 0.000 claims abstract description 36
- 230000008859 change Effects 0.000 claims abstract description 8
- 230000009471 action Effects 0.000 claims abstract description 7
- 239000003570 air Substances 0.000 description 45
- 239000004020 conductor Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002887 superconductor Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the field of air conditioner control, and discloses a control method of an air conditioner, which comprises the following steps: the first step: the air conditioner controller measures the resistance value of the compressor or the fan motor in real time; and a second step of: calculating the temperature of windings of the compressor and the fan motor according to the change of the resistance value; and a third step of: the temperature is compared with a preset value, and then the control action is output. Compared with the traditional protection control method, the method has the advantages that thermistors of the evaporator and the condenser do not need to be monitored, and the control and wiring operation is simpler and more effective.
Description
Technical Field
The invention relates to the field of air conditioner control, in particular to a control method of an air conditioner.
Background
An air conditioner is a device for adjusting and controlling parameters such as temperature, humidity, cleanliness, flow rate and the like of air in a building/structure by manual means, and most of the air conditioner utilizes refrigerants to evaporate or condense under the action of a compressor, so that the evaporation or condensation of ambient air is initiated, and the aim of changing temperature and humidity is fulfilled.
The common household air conditioner adopts a thermistor to detect the temperatures of the evaporator and the condenser, and judges the working states of key parts of the air conditioner through temperature values or change curves thereof, thereby carrying out protection and fault diagnosis.
The protection mode does not directly detect the state of key parts and is indirectly protected, and the defects of inaccurate protection and untimely protection action of the key parts (a compressor and a motor) in the air conditioner are overcome, so that the control method of the air conditioner is provided.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a control method of an air conditioner, wherein a resistance value detection module is added to an air conditioner control module, and the resistance values of an air conditioner compressor and a motor are measured in real time. Judging whether the key parts are normal or not according to the change rule of the resistance value of the components, and accordingly taking corresponding protection measures for the air conditioner.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: a control method of an air conditioner, comprising the steps of:
the first step: the air conditioner controller measures the resistance value of the compressor or the fan motor in real time;
and a second step of: calculating the temperature of windings of the compressor and the fan motor according to the change of the resistance value;
and a third step of: and comparing and judging the temperature with a preset value, and then outputting a control action.
Preferably, the specific content of the first step is: the air conditioner controller is connected with the motor through a wiring terminal R/S/T of the compressor, the motor is connected with the controller through U/V/W, the controller measures the resistance between terminals RS/RT/ST, and meanwhile, measures the resistance between terminals UV/UW/VW of the motor.
Preferably, the specific content of the second step is: and calculating the temperature rise of the compressor winding and the motor winding according to the difference of the resistance values, and obtaining the real-time temperature of the winding.
Preferably, the specific content of the third step is:
s1: the air conditioner controller presets a winding resistance Rmax, winding temperatures T1, T2 and T3, and the air conditioner performs sectional control according to different temperatures;
s2: detecting that the resistance value of the winding exceeds Rmax, stopping the whole air conditioner, and inputting fault codes;
s3: when the temperature of the winding exceeds a preset value T1, the controller cuts off the power supply and inputs a protection code;
s4: when the temperature of the T2 is less than or equal to the temperature of the winding is less than or equal to T1, the controller carries out deceleration treatment;
s5: the winding temperature is less than or equal to T2, and the air conditioner operates normally.
(III) beneficial effects
Compared with the prior art, the invention provides a control method of an air conditioner, which has the following beneficial effects:
1. the control method of the air conditioner has the characteristics of real-time monitoring and rapid protection action. Compared with the traditional protection control method, the method has the advantages that thermistors of the evaporator and the condenser do not need to be monitored, and the control and wiring operation is simpler and more effective.
Drawings
FIG. 1 is a schematic diagram of the control principle of the present invention;
fig. 2 is a schematic diagram.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-2, a control method of an air conditioner includes the following steps:
the first step: the air conditioner controller measures the resistance value of the compressor or the fan motor in real time;
the air conditioner controller is connected with the motor through a wiring terminal R/S/T of the compressor, the motor is connected with the controller through U/V/W, the controller measures the resistance between terminals RS/RT/ST, and meanwhile, measures the resistance between terminals UV/UW/VW of the motor.
The air conditioner controller is a machine capable of remotely controlling the air conditioner, and is mainly realized by an interface on a computer, and corresponding instructions are given to the air conditioner by receiving infrared signals from the air conditioner remote controller.
The air conditioner controller is not required to be connected with other power supplies, is directly supplied through an interface of the air conditioner, is not connected with redundant wires, is convenient to install, and can control a plurality of computers at the same time.
The main function of the air conditioner controller is to receive the infrared remote control of the air conditioner, control the temperature and the like, and receive the infrared signals from the remote control of the air conditioner to switch the air conditioner, change the temperature and the mode and control the air conditioner.
With the progress of network technology, the air conditioner controller is also continuously developed, the functions of fault switching and timing switching modes in the air conditioner controller are increased, the running modes of the air conditioner are balanced, and the air conditioner is more intelligent.
The resistance is represented by "R", which is a physical quantity that indicates the magnitude of the current blocking effect of a conductor in physics, and the larger the resistance of a conductor, the larger the current blocking effect of a conductor, the different conductors, the resistance generally being different, and the resistance being a characteristic of the conductor itself. The resistance will cause a change in the electron flux, the smaller the resistance the greater the electron flux and vice versa. While superconductors have no resistance.
And a second step of: calculating the temperature of windings of the compressor and the fan motor according to the change of the resistance value;
and calculating the temperature rise of the compressor winding and the motor winding according to the difference of the resistance values, and obtaining the real-time temperature of the winding.
Compressor windingTemperature t at the time of group thermal state 2 =
(t 1 +234.5)-234.5 （℃）；
t 2 =(R 2 /R 1 )(t 1 +234.5)-234.5；
t 2 -the temperature in degrees centigrade at which the compressor winding is hot (just stopped);
t 1 -the ambient temperature of the running winding in cold, i.e. the ambient temperature at which the cold resistance R1 is measured, in degrees centigrade;
R 2 -the resistance (R) of the running winding in thermal (just stopped) conditions;
R 1 in the cold state (normal temperature t 1 ) A resistance (n) of the run winding under conditions;
234.5-is the heat transfer coefficient of copper, which coefficient may be replaced with that of other metals.
Conversion formula of resistance and temperature in measurement:
actual temperature at compressor winding measurement:
-t 0 ；
R 0 =R 1 {1+a（t 1 -t 0 ）}（Ω）
wherein:
R 1 a measured resistance value (Ω);
R 0 rated resistance value (Ω);
a resistivity, generally taken as a= 0.00393;
t 1 the actual temperature (DEG C) at the time of measurement;
t 0 taking t from rated temperature 0 =20 （℃）；
And a third step of: and comparing and judging the temperature with a preset value, and then outputting a control action.
The air conditioner controller presets a winding resistance Rmax, winding temperatures T1, T2 and T3, and the air conditioner performs sectional control according to different temperatures;
detecting that the resistance value of the winding exceeds Rmax, stopping the whole air conditioner, and inputting fault codes;
when the temperature of the winding exceeds a preset value T1, the controller cuts off the power supply and inputs a protection code;
when the temperature of the T2 is less than or equal to the temperature of the winding is less than or equal to T1, the controller carries out deceleration treatment;
the winding temperature is less than or equal to T2, and the air conditioner operates normally.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A control method of an air conditioner, comprising the steps of:
the first step: the air conditioner controller measures the resistance value of the compressor or the fan motor in real time;
and a second step of: calculating the temperature of windings of the compressor and the fan motor according to the change of the resistance value;
and a third step of: and comparing and judging the temperature with a preset value, and then outputting a control action.
2. The control method of an air conditioner according to claim 1, wherein: the specific content of the first step is as follows: the air conditioner controller is connected with the motor through a wiring terminal R/S/T of the compressor, the motor is connected with the controller through U/V/W, the controller measures the resistance between terminals RS/RT/ST, and meanwhile, measures the resistance between terminals UV/UW/VW of the motor.
3. The control method of an air conditioner according to claim 1, wherein: the specific content of the second step is as follows: and calculating the temperature rise of the compressor winding and the motor winding according to the difference of the resistance values, and obtaining the real-time temperature of the winding.
4. The control method of an air conditioner according to claim 1, wherein: the specific content of the third step is as follows:
s1: the air conditioner controller presets a winding resistance Rmax, winding temperatures T1, T2 and T3, and the air conditioner performs sectional control according to different temperatures;
s2: detecting that the resistance value of the winding exceeds Rmax, stopping the whole air conditioner, and inputting fault codes;
s3: when the temperature of the winding exceeds a preset value T1, the controller cuts off the power supply and inputs a protection code;
s4: when the temperature of the T2 is less than or equal to the temperature of the winding is less than or equal to T1, the controller carries out deceleration treatment;
s5: the winding temperature is less than or equal to T2, and the air conditioner operates normally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211695302.6A CN116007146A (en) | 2022-12-28 | 2022-12-28 | Control method of air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211695302.6A CN116007146A (en) | 2022-12-28 | 2022-12-28 | Control method of air conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN116007146A true CN116007146A (en) | 2023-04-25 |
Family
ID=86020468
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211695302.6A Pending CN116007146A (en) | 2022-12-28 | 2022-12-28 | Control method of air conditioner |
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| CN (1) | CN116007146A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05288411A (en) * | 1992-04-07 | 1993-11-02 | Daikin Ind Ltd | Preheating control device for compressor |
| JP2002272171A (en) * | 2001-03-08 | 2002-09-20 | Mitsubishi Heavy Ind Ltd | Apparatus for diagnosing failure in fan motor |
| CN104121702A (en) * | 2013-04-28 | 2014-10-29 | 珠海格力电器股份有限公司 | Heat-pump water heater and control method thereof |
| CN107504732A (en) * | 2017-08-31 | 2017-12-22 | 四川长虹电器股份有限公司 | A kind of refrigeration system refrigerant how many decision method and decision maker |
| CN107869456A (en) * | 2017-11-16 | 2018-04-03 | 广东美的制冷设备有限公司 | Progress control method, operating control device and compressor |
| CN109210732A (en) * | 2018-08-29 | 2019-01-15 | 重庆美的通用制冷设备有限公司 | Excess temperature protection method, device, air-conditioner set and the electronic equipment of air-conditioner set |
| CN113028674A (en) * | 2021-03-31 | 2021-06-25 | 四川长虹空调有限公司 | Control protection method of refrigeration system |
-
2022
- 2022-12-28 CN CN202211695302.6A patent/CN116007146A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05288411A (en) * | 1992-04-07 | 1993-11-02 | Daikin Ind Ltd | Preheating control device for compressor |
| JP2002272171A (en) * | 2001-03-08 | 2002-09-20 | Mitsubishi Heavy Ind Ltd | Apparatus for diagnosing failure in fan motor |
| CN104121702A (en) * | 2013-04-28 | 2014-10-29 | 珠海格力电器股份有限公司 | Heat-pump water heater and control method thereof |
| CN107504732A (en) * | 2017-08-31 | 2017-12-22 | 四川长虹电器股份有限公司 | A kind of refrigeration system refrigerant how many decision method and decision maker |
| CN107869456A (en) * | 2017-11-16 | 2018-04-03 | 广东美的制冷设备有限公司 | Progress control method, operating control device and compressor |
| CN109210732A (en) * | 2018-08-29 | 2019-01-15 | 重庆美的通用制冷设备有限公司 | Excess temperature protection method, device, air-conditioner set and the electronic equipment of air-conditioner set |
| CN113028674A (en) * | 2021-03-31 | 2021-06-25 | 四川长虹空调有限公司 | Control protection method of refrigeration system |
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