CN105698337B - A kind of air-conditioning start-up phase compress control method and device - Google Patents
A kind of air-conditioning start-up phase compress control method and device Download PDFInfo
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- CN105698337B CN105698337B CN201610073697.4A CN201610073697A CN105698337B CN 105698337 B CN105698337 B CN 105698337B CN 201610073697 A CN201610073697 A CN 201610073697A CN 105698337 B CN105698337 B CN 105698337B
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- 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
-
- 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
-
- 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
-
- 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
-
- 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
Abstract
The invention discloses a kind of air-conditioning start-up phase compress control method and devices.This method comprises: control system is after powering, interior machine tube temperature is obtained in real time by temperature sensing package；The control system determines corresponding temperature threshold according to the current available machine time, wherein the temperature threshold changed including at least two with the available machine time；Interior machine tube temperature and the temperature threshold described in the control system real time contrast control pressure size to control the start and stop of outer blower.This programme effectively reduce air-conditioning under high temperature environment high load capacity heating starting when existing booster risk and since air-conditioning system caused by hypertonia is abnormal.
Description
Technical field
The present embodiments relate to automatic control technology more particularly to a kind of air-conditioning start-up phase compress control methods and dress
It sets.
Background technique
Pressure in air-conditioning use process mainly includes balance pressure, high-pressure and low pressure.Three pressure are systems
Cryogen circulates in pressure corresponding to different location in air-conditioning duct.Wherein, it is high when balance pressure refers to that compressor does not work
Pressure when low-pressure balance；High-pressure refers to pressure at expulsion or condensing pressure；Low pressure refers to pressure of inspiration(Pi) or evaporating pressure.Three
The measurement of a pressure is all on the technique mouth of outdoor unit air valve, and air-conditioning is low pressure in refrigeration operation, when heating operation
It is balance pressure when not working for high-pressure.
Since circulation change is along with heat absorption and heat release between gas-liquid for refrigerant, so the temperature of external environment has it
Apparent to influence, under normal circumstances, environment temperature is high, and pressure value becomes larger, and environment temperature is low, and pressure value becomes smaller.Therefore, work as the external world
When environment temperature is higher, excessively high high-pressure, high-pressure mistake will be generated in start-up phase if air-conditioning opens heating mode
It is high then situations such as easily lead to booster or abnormal air-conditioning high voltage protective.
Since pressure sensor price is higher, while there are certain proportionate relationships for air-conditioning internal pressure and temperature, therefore existing
Have in technology and carry out temperature measurement in such a way that temperature sensing package is installed in air-conditioning internal machine, air-conditioner control system is obtained according to temperature sensing package
The temperature transition taken is corresponding pressure value to monitor, control the risks such as hypertonia bring booster, system exception.With people
To the continuous improvement of the parameter requests such as efficiency of air conditioner, volume and the use of new and effective refrigerant, air-conditioning is heated in high load capacity
Excessively high pressure value will be generated when booting, and temperature can't improve moment, i.e. air-conditioner control system passes through interior machine temperature sensing package
There are the high temperature-proof logics that hysteresis quality can not open air-conditioning in time no longer to be increased with controlling voltage for the temperature value of acquisition, therefore existing skill
There are some potential safety problemss for the solution of art.
Summary of the invention
The present invention provides a kind of air-conditioning start-up phase compress control method and devices, to reduce air-conditioning under high temperature environment
Existing booster risk and since air-conditioning system caused by hypertonia is abnormal when high load capacity heating starting.
In a first aspect, the embodiment of the invention provides a kind of air-conditioning start-up phase compress control methods, comprising:
Control system obtains interior machine tube temperature in real time after powering, by temperature sensing package；
The control system determines corresponding temperature threshold according to the current available machine time, wherein including at least two with opening
The temperature threshold of machine time change；
Interior machine tube temperature and the temperature threshold described in the control system real time contrast are controlled with controlling the start and stop of outer blower
Pressing pressure size.
Second aspect, the present invention provides a kind of air-conditioning start-up phase pressure control device, which includes:
Interior machine tube temperature obtains module, after powering for control system, obtains interior machine tube temperature in real time by temperature sensing package；
Temperature threshold determining module determines corresponding temperature threshold according to the current available machine time for the control system,
Wherein, the temperature threshold changed including at least two with the available machine time；
Temperature comparison module, for interior machine tube temperature and the temperature threshold described in the control system real time contrast, with control
The start and stop of outer blower are made to control pressure size.
The present invention obtains interior machine tube temperature by temperature sensing package after control system booting in real time, and control system is according to currently opening
The machine time determines corresponding temperature threshold, then machine tube temperature and the temperature threshold in real time contrast, is come with controlling the start and stop of outer blower
Control pressure size.Since different temperature thresholds being determined according to the different available machine times, so solving air-conditioning in high load capacity
When heating booting, there are hysteresis qualitys can not open air-conditioning in time for the temperature value of air-conditioner control system obtained by interior machine temperature sensing package
High temperature-proof logic to control the problem of voltage no longer increases, effectively reduce air-conditioning under high temperature environment high load capacity heating starting
When existing booster risk and since the abnormal probability occurred occurs in air-conditioning system caused by hypertonia.
Detailed description of the invention
Fig. 1 is the flow chart for the air-conditioning start-up phase compress control method that the embodiment of the present invention one provides；
Fig. 2 a is the flow chart of air-conditioning start-up phase compress control method provided by Embodiment 2 of the present invention；
Fig. 2 b is the correspondence diagram of temperature threshold provided by Embodiment 2 of the present invention and available machine time；
Fig. 3 a is the flow chart for the air-conditioning start-up phase compress control method that the embodiment of the present invention three provides；
Fig. 3 b is the temperature threshold and the correspondence diagram of available machine time that the embodiment of the present invention three provides；
Fig. 4 is the flow chart for the air-conditioning start-up phase compress control method that the embodiment of the present invention four provides；
Fig. 5 is the structure chart for the air-conditioning start-up phase pressure control device that the embodiment of the present invention five provides.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Embodiment one
Fig. 1 is the flow chart for the air-conditioning start-up phase compress control method that the embodiment of the present invention one provides, and the present embodiment can
When higher suitable for ambient temperature, air-conditioning opens the situation of heat-production functions, and this method can be executed by air-conditioner host, has
Body includes the following steps:
Step 101, control system obtain interior machine tube temperature in real time after powering, by temperature sensing package；
Wherein, temperature sensing package acquires the tube temperature of air-conditioning internal machine by temperature sensor in real time, and collected temperature is turned by A/D
Parallel operation is sent into control system.Control system is typically a complete SCM system, and it is preferable to use temperature-sensitive electricity for temperature sensor
Resistance temperature sensor, the preferred ADC0809 converter of A/D converter, the converter are used for the analog signal for obtaining temperature sensing package
Digital signal is converted to, and the signal after conversion is transmitted to the master chip in control system by its output port.
Step 102, the control system determine corresponding temperature threshold according to the current available machine time, wherein including at least
Two temperature thresholds changed with the available machine time；
Wherein, temperature threshold is the critical value whether control system starts high temperature-proof logic, and high temperature-proof logic is commonly used in
The protectiveness of air-conditioning is shut down, if temperature threshold is 65 DEG C, then once being more than that the temperature high temperature-proof logic can enable automatically.Work as user
When opening air-conditioning unlatching heat-production functions, the timer of control system will automatically record the time of air-conditioning unlatching, according to different
Available machine time determining temperature threshold corresponding with the available machine time, rather than use fixed temperature threshold value.It should be determined with the available machine time
Temperature threshold include at least two.
Interior machine tube temperature and the temperature threshold described in step 103, the control system real time contrast, to control outer blower
Start and stop control pressure size；
Wherein, the interior machine tube temperature temperature threshold corresponding with the booting moment that control system is got in real time according to step 101
Value is compared, and starts or stops according to the obtained outer blower of Different Results control is compared.
Air-conditioning described in the present embodiment is typically split-type air conditioner, mainly (interior by outdoor unit (outer machine) and indoor unit
Machine) two large divisions's composition.Wherein, outer blower is mounted in outdoor unit, is made of casing, impeller, air inlet and external rotor electric machine,
It is mainly responsible for heating, indoor unit is responsible for transporting heated gas into interior, and indoor cold air is transported to outdoor by pipeline, with
Achieve the effect that heating.Typically, the start and stop of outer blower can be realized according to control system by control relay.
Pressure described in this programme is preferably the high-pressure of air-conditioning, mainly includes three kinds of pressure in air-conditioning system, point
Pressure, high-pressure and low pressure Wei not balanced.Three kinds of pressure are that refrigerant circulates in different location institute in air-conditioning duct
Corresponding pressure.Balance pressure finger pressure contracting machine is when working, and pressure when high-low pressure balance, high-pressure refers to pressure at expulsion or cold
Solidifying pressure, low pressure refer to pressure of inspiration(Pi) or evaporating pressure.The specific value of three pressure can be in the technique mouth of outdoor unit air valve
On measure, measure low pressure when refrigeration operation, when heating operation measures high-pressure, and pressure when not working is balance pressure
Power.Starting or stoping for outer blower will directly affect the pressure for acting on air-conditioning.
The working principle of the air-conditioning start-up phase compress control method:
The analog signal values of the temperature sensor temperature collection of temperature sensing package are converted to digital signal value through A/D and are transmitted to control
System processed, control system are compared outer to determine according to the temperature threshold and the temperature value acquired in real time of corresponding available machine time
The start and stop of blower.
Technical solution provided in this embodiment since different temperature thresholds being determined according to the different available machine times, so
Air-conditioning is solved when high load capacity is heated and is switched on, the temperature value of air-conditioner control system obtained by interior machine temperature sensing package has lag
Property can not open the high temperature-proof logic of air-conditioning in time to control the problem of voltage no longer increases, and effectively reduce air-conditioning in high temperature ring
Under border when high load capacity heating starting existing booster risk and because of situations such as air-conditioning system caused by hypertonia occur it is abnormal
The probability of generation.
Embodiment two
Fig. 2 a is the flow chart of air-conditioning start-up phase compress control method provided by Embodiment 2 of the present invention, and the present embodiment exists
On the basis of above-described embodiment, preferably gives one kind and corresponding temperature threshold is specifically determined according to the current available machine time
Method specifically includes as shown in Figure 2 a:
Step 201, control system obtain interior machine tube temperature in real time after powering, by temperature sensing package.
Step 202, the control system determine corresponding temperature threshold according to the current available machine time, wherein including at least
Two temperature thresholds changed with the available machine time, at least two temperature threshold are set with different available machine time section correspondences respectively
It sets；
Wherein, at least two temperature thresholds are correspondingly arranged with different available machine time sections respectively, illustratively, specific corresponding
Relationship is as shown in Figure 2 b, and Fig. 2 b is the correspondence diagram of temperature threshold provided by Embodiment 2 of the present invention and available machine time,
Such as figure:
Air-conditioning is denoted as the moment 0 when opening, and corresponding temperature threshold is T1 at this time, with the gradually growth of available machine time, when
T moment is reached, corresponding temperature threshold is changed to T2, and temperature threshold T2 will continue as far as entire operation of air conditioner process.Allusion quotation
Type, moment t may be configured as 5 minutes, and T1 may be configured as 45 DEG C, and T2 may be configured as 60 DEG C.I.e. air-conditioning opens preceding 5 when running
Minute corresponding temperature threshold is T1, from the after five minutes temperature threshold be changed to T2.
Interior machine tube temperature and the temperature threshold described in step 203, the control system real time contrast, to control outer blower
Start and stop control pressure size；
Wherein, at the booting moment 0 between t, corresponding temperature threshold is T1, the temperature threshold that interior machine tube temperature compares at this time
As T1.After between being upon power-up more than moment t, determining temperature threshold is T2 at this time, which will be with
Temperature threshold T2 is compared.
Technical solution provided in this embodiment solves air-conditioning when high load capacity is heated and is switched on, and air-conditioner control system passes through
The high temperature-proof logic that the temperature value that interior machine temperature sensing package obtains can not open air-conditioning there are hysteresis quality in time is no longer risen with controlling voltage
High problem, effectively reduce air-conditioning under high temperature environment high load capacity heating starting when existing booster risk and due to pressure mistake
There is the probability occurred situations such as abnormal in air-conditioning system caused by height.
On the basis of above-mentioned each embodiment, temperature threshold is improved with the growth of available machine time section.Due to being switched on
In the process, with the raising of compressor frequency, air-conditioning high-pressure can increased dramatically in a short time, and the hysteresis quality of temperature-sensitive needs
Lower temperature threshold is set to open high temperature-proof logic in time, with the growth of available machine time, pressure in the booting initial stage
Contracting unit frequency is more steady, and the hysteresis quality of temperature-sensitive is gradually reduced at this time, and corresponding temperature threshold is turned up therewith.
Embodiment three
Fig. 3 a is the flow chart for the air-conditioning start-up phase compress control method that the embodiment of the present invention three provides, and the present embodiment exists
On the basis of above-described embodiment, preferably gives another kind and corresponding temperature threshold is specifically determined according to the current available machine time
Method, specifically include as shown in Figure 3a:
Step 301, control system obtain interior machine tube temperature in real time after powering, by temperature sensing package.
Step 302, the control system determine corresponding temperature threshold according to the current available machine time, wherein including at least
Two temperature thresholds changed with the available machine time, at least two temperature threshold are linearly improved with the extension of available machine time；
Wherein, at least two temperature thresholds are linearly improved with the extension of available machine time, illustratively, specific variation relation
As shown in Figure 3b, Fig. 3 b is the correspondence diagram of temperature threshold and available machine time that the embodiment of the present invention three provides, is such as schemed:
Air-conditioning is denoted as the moment 0 when opening, and corresponding temperature threshold is T1 at this time, with the gradually growth of available machine time, when
T moment is reached, corresponding temperature threshold is changed to T2, and during moment 0 to moment t, temperature threshold T1 linear increase is extremely
T2。
Interior machine tube temperature and the temperature threshold described in step 303, the control system real time contrast, to control outer blower
Start and stop control pressure size；
Wherein, at the booting moment 0 between t, corresponding temperature threshold extends linear change, control system root according to the time
It is corresponded to according to different time points and the interior machine tube temperature comparison that the corresponding temperature threshold of point is used for He obtains in real time is calculated.
Technical solution provided in this embodiment solves air-conditioning when high load capacity is heated and is switched on, and air-conditioner control system passes through
The high temperature-proof logic that the temperature value that interior machine temperature sensing package obtains can not open air-conditioning there are hysteresis quality in time is no longer risen with controlling voltage
High problem, effectively reduce air-conditioning under high temperature environment high load capacity heating starting when existing booster risk and due to pressure mistake
There is the probability occurred situations such as abnormal in air-conditioning system caused by height.
Example IV
Fig. 4 is the flow chart for the air-conditioning start-up phase compress control method that the embodiment of the present invention four provides, and the present embodiment exists
On the basis of above-described embodiment, the control flow of specific outer blower start and stop is preferably given, includes: as shown in Figure 4
Step 401, control system obtain interior machine tube temperature in real time after powering, by temperature sensing package.
Step 402, the control system determine corresponding temperature threshold according to the current available machine time, wherein including at least
Two temperature thresholds changed with the available machine time.
Interior machine tube temperature and the temperature threshold described in step 403, the control system real time contrast.
Step 404 judges whether interior machine tube temperature is greater than or equal to temperature threshold, if so, 405 are thened follow the steps, if it is not, then
Execute step 406.
Step 405, the control system control outer blower are out of service.
Whether step 406, the outer blower of judgement are in operating status, if so then execute step 407, then follow the steps if not
408。
Step 407, the control outer blower continue to keep the operating status.
Step 408, the outer blower starting of control.
Technical solution provided in this embodiment solves air-conditioning when high load capacity is heated and is switched on, and air-conditioner control system passes through
The high temperature-proof logic that the temperature value that interior machine temperature sensing package obtains can not open air-conditioning there are hysteresis quality in time is no longer risen with controlling voltage
High problem, effectively reduce air-conditioning under high temperature environment high load capacity heating starting when existing booster risk and due to pressure mistake
There is the probability occurred situations such as abnormal in air-conditioning system caused by height, while realizing when interior machine temperature is again less than temperature threshold
The automatic starting of the outer blower of air-conditioning.
Embodiment five
Fig. 5 show the structure chart of the air-conditioning start-up phase pressure control device of the offer of the embodiment of the present invention five, this implementation
Example be applicable to ambient temperature it is higher when, air-conditioning opens the situation of heat-production functions, and the specific structure of the device includes:
Interior machine tube temperature obtains module 1, after powering for control system, obtains interior machine tube temperature in real time by temperature sensing package；
Temperature threshold determining module 2 determines corresponding temperature threshold according to the current available machine time for the control system,
Wherein, the temperature threshold changed including at least two with the available machine time；
Temperature comparison module 3, for interior machine tube temperature and the temperature threshold described in the control system real time contrast, with control
The start and stop of outer blower are made to control pressure size.
The working principle of the device are as follows:
The analog signal values of the temperature sensor temperature collection of temperature sensing package are converted to digital signal value through A/D and are transmitted to control
System processed, control system are compared outer to determine according to the temperature threshold and the temperature value acquired in real time of corresponding available machine time
The start and stop of blower.
Technical solution provided in this embodiment solves air-conditioning when high load capacity is heated and is switched on, and air-conditioner control system passes through
The high temperature-proof logic that the temperature value that interior machine temperature sensing package obtains can not open air-conditioning there are hysteresis quality in time is no longer risen with controlling voltage
High problem, effectively reduce air-conditioning under high temperature environment high load capacity heating starting when existing booster risk and due to pressure mistake
There is the probability occurred situations such as abnormal in air-conditioning system caused by height.
Based on the above technical solution, at least two temperature thresholds are set from different available machine time section correspondences respectively
It sets.
Based on the above technical solution, temperature threshold is improved with the growth of available machine time section.
Based on the above technical solution, at least two temperature thresholds are linearly improved with the extension of available machine time.
Based on the above technical solution, the start and stop of blower include: outside the control
When the interior machine tube temperature is greater than or equal to the temperature threshold, the control system control outer blower stops
Operation.
Based on the above technical solution, the start and stop of the outer blower of the control further include:
When the interior machine tube temperature is less than the temperature threshold, judge whether the outer blower is in operating status, if so,
The outer blower is then controlled to continue to keep the operating status；If it is not, then controlling the outer blower starting.
Method provided by any embodiment of the invention can be performed in the said goods, has the corresponding functional module of execution method
And beneficial effect.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (6)
1. a kind of air-conditioning start-up phase compress control method characterized by comprising
Control system obtains interior machine tube temperature in real time after powering, by temperature sensing package；
The control system determines corresponding temperature threshold according to the current available machine time, wherein when including at least two with booting
Between the temperature threshold that changes, at least two temperature thresholds linearly improve with the extension of available machine time；
When the interior machine tube temperature is greater than or equal to the temperature threshold, it is out of service that the control system controls outer blower；
When the interior machine tube temperature is less than the temperature threshold, judge whether the outer blower is in operating status, if so, control
The outer blower is made to continue to keep the operating status；If it is not, then controlling the outer blower starting.
2. air-conditioning start-up phase compress control method according to claim 1, it is characterised in that:
At least two temperature thresholds are correspondingly arranged from different available machine time sections respectively.
3. air-conditioning start-up phase compress control method according to claim 2, it is characterised in that:
Temperature threshold is improved with the growth of available machine time section.
4. a kind of air-conditioning start-up phase pressure control device, which is characterized in that the device includes:
Interior machine tube temperature obtains module, after powering for control system, obtains interior machine tube temperature in real time by temperature sensing package；
Temperature threshold determining module determines corresponding temperature threshold according to the current available machine time for the control system, wherein
The temperature threshold changed including at least two with the available machine time, at least two temperature thresholds are linearly mentioned with the extension of available machine time
It is high；
Temperature comparison module, for when the interior machine tube temperature is greater than or equal to the temperature threshold, the control system to be controlled
Outer blower is out of service；When the interior machine tube temperature is less than the temperature threshold, judge whether the outer blower is in operation shape
State, if so, the control outer blower continues to keep the operating status；If it is not, then controlling the outer blower starting.
5. air-conditioning start-up phase pressure control device according to claim 4, it is characterised in that:
At least two temperature thresholds are correspondingly arranged from different available machine time sections respectively.
6. air-conditioning start-up phase pressure control device according to claim 5, it is characterised in that:
Temperature threshold is improved with the growth of available machine time section.
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| CN106545954B (en) * | 2016-10-08 | 2019-03-08 | 珠海格力电器股份有限公司 | A kind of temprature control method of air-conditioning, device and air-conditioning |
| CN110207332A (en) * | 2019-06-11 | 2019-09-06 | 珠海格力电器股份有限公司 | The pressure detection method and air conditioner of air conditioner |
| CN111578440B (en) * | 2020-05-09 | 2021-10-15 | 宁波奥克斯电气股份有限公司 | Air conditioner heating high-temperature-prevention control method and device and air conditioner |
| CN113154624B (en) * | 2021-04-16 | 2022-05-06 | 宁波奥克斯电气股份有限公司 | Air conditioner compressor starting control method and air conditioner |
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| CN105004020A (en) * | 2015-07-02 | 2015-10-28 | 珠海格力电器股份有限公司 | Air conditioning heating startup control method and control device |
| CN105042770A (en) * | 2015-07-02 | 2015-11-11 | 珠海格力电器股份有限公司 | Control method and device for air conditioner heating startup |
| CN105180359A (en) * | 2015-09-02 | 2015-12-23 | 珠海格力电器股份有限公司 | Control method and device for preventing high temperature, and air conditioner |
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| CN105004020A (en) * | 2015-07-02 | 2015-10-28 | 珠海格力电器股份有限公司 | Air conditioning heating startup control method and control device |
| CN105042770A (en) * | 2015-07-02 | 2015-11-11 | 珠海格力电器股份有限公司 | Control method and device for air conditioner heating startup |
| CN105180359A (en) * | 2015-09-02 | 2015-12-23 | 珠海格力电器股份有限公司 | Control method and device for preventing high temperature, and air conditioner |
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