CN111043724A - Control method of air conditioner - Google Patents
Control method of air conditioner Download PDFInfo
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- CN111043724A CN111043724A CN201911395840.1A CN201911395840A CN111043724A CN 111043724 A CN111043724 A CN 111043724A CN 201911395840 A CN201911395840 A CN 201911395840A CN 111043724 A CN111043724 A CN 111043724A
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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
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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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
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/34—Heater, e.g. gas burner, electric air heater
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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
Abstract
The invention relates to the technical field of air conditioning, in particular to a control method of an air conditioner. The invention aims to solve the problem of poor control precision of the conventional auxiliary electric heater. To this end, the control method of the air conditioner of the present invention includes: detecting the outdoor environment temperature when the air conditioner is in heating operation; when the outdoor environment temperature is less than or equal to the preset temperature, starting the first electric heating section; after the first electric heating section is started, detecting the air outlet temperature of the indoor unit every other first preset time period; judging the sizes of the outlet air temperature and a first outlet air temperature threshold value; and when the air outlet temperature is greater than or equal to the first air outlet temperature threshold value, the rotating speed of the inner fan is increased. The control method can improve the control precision of the auxiliary electric heating, maintain the heating quantity constant and keep the heating effect stable.
Description
Technical Field
The invention relates to the technical field of air conditioning, in particular to a control method of an air conditioner.
Background
The current air conditioner has wide application, and can basically meet the refrigerating and heating requirements of users. However, under extreme weather conditions, such as a low outdoor environment temperature in winter, the evaporation pressure and the evaporation temperature of the outdoor heat exchanger are both reduced to a low level due to the low outdoor environment temperature during the heating cycle of the air conditioner, and at this time, the heat exchange effect of the outdoor heat exchanger is poor, and the heating effect of the air conditioner is obviously reduced.
To above-mentioned problem, utility model patent that publication number is CN202993410U provides a built-in no helping electric heater's outer machine of air-conditioner, and it sets up supplementary electric heater through the condenser below at the off-premises station, opens by opening of off-premises station main control board control supplementary electric heater and stops, and when outdoor ring temperature was less than the setting value and the air conditioner was opened and is heated, the automatic preheating system refrigerant that opens of supplementary electric heater to reach the evaporation temperature that improves under the working condition of heating, improve the purpose of the efficiency of heating then. Similarly, utility model patent No. CN203364511U provides an air conditioner evaporimeter with force effect of heating, and it is through embedding electric heating net in the evaporimeter body, installs the outdoor temperature probe that is used for responding to outdoor ambient temperature on the evaporimeter body, realizes that the air conditioner still can have better heating effect when low temperature heats.
Although the technical scheme solves the problem of poor heat exchange effect of the outdoor heat exchanger during low-temperature heating to a certain extent, the following problems are also inevitable: according to the technical scheme, the auxiliary electric heater can be simply controlled to be turned on or off only based on the outdoor environment temperature or the heating time, so that the heating capacity of the air conditioning system can fluctuate along with the turning on or off of the auxiliary electric heater in the actual use process, and the outlet air temperature of the indoor unit is suddenly high or low and cannot be kept constant.
Accordingly, there is a need in the art for a new control method of an air conditioner to solve the above-mentioned problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problem of poor control accuracy of the conventional auxiliary electric heater, the present invention provides a control method of an air conditioner, the air conditioner includes an outdoor unit and an indoor unit, the indoor unit includes an inner fan, the outdoor unit includes an outdoor heat exchanger, the outdoor heat exchanger is configured with a first electric heating section and a second electric heating section, and the control method includes:
detecting the outdoor environment temperature when the air conditioner is in heating operation;
when the outdoor environment temperature is less than or equal to a preset temperature, starting the first electric heating section;
after the first electric heating section is started, detecting the air outlet temperature of the indoor unit every other first preset time period;
judging the sizes of the air outlet temperature and a first air outlet temperature threshold value;
and when the air outlet temperature is greater than or equal to the first air outlet temperature threshold value, the rotating speed of the inner fan is increased.
In a preferred embodiment of the control method of the air conditioner, after the step of "increasing the rotation speed of the internal fan", the control method further includes:
detecting the outlet temperature of the outdoor heat exchanger and the outlet air temperature of the indoor unit every second preset time period;
respectively judging the outlet temperature and a first outlet temperature threshold value and the outlet air temperature and a first outlet air temperature threshold value;
and controlling the opening and closing of the first electric heating section and the rotating speed of the inner fan based on the judgment result.
In a preferred embodiment of the control method of an air conditioner, the step of controlling the opening and closing of the first electric heating section and the rotation speed of the inner fan based on the determination result further includes:
when the outlet temperature is greater than or equal to the first outlet temperature threshold and/or the outlet air temperature threshold is still greater than or equal to the first outlet air temperature threshold, closing the first electric heating section and reducing the rotating speed of the inner fan;
and when the outlet temperature is smaller than the first outlet temperature threshold and the outlet air temperature is smaller than the first outlet air temperature threshold, reducing the rotating speed of the inner fan.
In a preferred embodiment of the above method for controlling an air conditioner, the method further includes:
detecting the outlet temperature of the outdoor heat exchanger every other first preset time period;
judging the magnitude of the outlet temperature and a first outlet temperature threshold value;
and when the outlet temperature is greater than or equal to the first outlet temperature threshold value and the outlet air temperature is less than the first outlet air temperature threshold value, closing the first electric heating section.
In a preferred embodiment of the control method of the air conditioner, after the step of turning off the first electric heating section, the control method further includes:
detecting the outlet temperature of the outdoor heat exchanger and the outlet air temperature of the indoor unit every a third preset time period;
respectively judging the outlet temperature and a second outlet temperature threshold value and the outlet air temperature and a second outlet air temperature threshold value;
when the outlet temperature is lower than the second outlet temperature threshold value and the outlet air temperature is lower than the second outlet air temperature threshold value, the first electric heating section is started;
and the second outlet temperature threshold is smaller than the first outlet temperature threshold, and the second outlet temperature threshold is smaller than the first outlet temperature threshold.
In a preferred embodiment of the above method for controlling an air conditioner, the method further includes:
detecting the outlet temperature of the outdoor heat exchanger every other first preset time period;
judging the magnitude of the outlet temperature and a first outlet temperature threshold value;
and when the outlet temperature is smaller than the first outlet temperature threshold value and the air outlet temperature is smaller than the first air outlet temperature threshold value, the second electric heating section is started.
In a preferred embodiment of the control method of the air conditioner, after the step of "turning on the second electric heating section", the control method further includes:
detecting the outlet temperature of the outdoor heat exchanger and the outlet air temperature of the indoor unit every fourth preset time period;
respectively judging the outlet temperature and the first outlet temperature threshold value and the outlet air temperature and the first outlet air temperature threshold value;
and when the air outlet temperature is greater than or equal to the first air outlet temperature threshold value, the rotating speed of the inner fan is increased.
In a preferred embodiment of the control method of the air conditioner, after the step of "increasing the rotation speed of the internal fan", the control method further includes:
detecting the outlet temperature of the outdoor heat exchanger and the outlet air temperature of the indoor unit every fifth preset time period;
respectively judging the outlet temperature and a first outlet temperature threshold value and the outlet air temperature and a first outlet air temperature threshold value;
and controlling the opening and closing of the second electric heating section and the rotating speed of the inner fan based on the judgment result.
In a preferred embodiment of the control method of an air conditioner, the step of controlling the opening and closing of the second electric heating section and the rotation speed of the inner fan based on the determination result further includes:
when the outlet temperature is greater than or equal to the first outlet temperature threshold and/or the outlet air temperature threshold is still greater than or equal to the first outlet air temperature threshold, closing the second electric heating section and reducing the rotating speed of the inner fan;
and when the outlet temperature is smaller than the first outlet temperature threshold and the outlet air temperature is smaller than the first outlet air temperature threshold, reducing the rotating speed of the inner fan.
In a preferred embodiment of the above method for controlling an air conditioner, the method further includes:
when the outlet temperature is greater than or equal to the first outlet temperature threshold and the outlet air temperature is less than the first outlet air temperature threshold, closing the second electric heating section;
and when the outlet temperature is smaller than the first outlet temperature threshold value and the outlet air temperature is smaller than the first outlet air temperature threshold value, keeping the second electric heating section open.
As can be understood by those skilled in the art, in a preferred embodiment of the present invention, an air conditioner includes an outdoor unit and an indoor unit, the indoor unit includes an inner fan, the outdoor unit includes an outdoor heat exchanger, the outdoor heat exchanger is configured with a first electrical heating section and a second electrical heating section, and a control method includes: detecting the outdoor environment temperature when the air conditioner is in heating operation; when the outdoor environment temperature is less than or equal to the preset temperature, starting the first electric heating section; after the first electric heating section is started, detecting the air outlet temperature of the indoor unit every other first preset time period; judging the sizes of the outlet air temperature and a first outlet air temperature threshold value; and when the air outlet temperature is greater than or equal to the first air outlet temperature threshold value, the rotating speed of the inner fan is increased.
Through the air-out temperature of every first preset time quantum detection indoor set after opening first electric heating section to when air-out temperature more than or equal to first air-out temperature threshold value, fan improvement rotational speed in the control, the control method of this application can improve auxiliary electric heating's control accuracy, maintains the heating volume invariable, under the condition of keeping electric heating to open the heat transfer of supplementary outdoor heat exchanger, avoids because the scald skin that air-out temperature leads to excessively high.
Further, through the outlet temperature of every first preset time detection outdoor heat exchanger when detecting the air-out temperature of indoor set, and be less than first outlet temperature threshold at outlet temperature, and when the air-out temperature was less than first air-out temperature threshold, open the second electrical heating section, make this application realize supplementary heat exchange's staged control, consequently this application can not appear in the implementation in-process that the switch of single electrical heating section leads to air conditioning system's heating volume to appear undulantly, then lead to the phenomenon that the air-out temperature of indoor set is suddenly high suddenly low.
Drawings
A control method of an air conditioner of the present invention is described below with reference to the accompanying drawings. In the drawings:
fig. 1 is a system diagram of an air conditioner of the present invention;
FIG. 2 is a flowchart illustrating a control method of an air conditioner according to the present invention;
fig. 3 is a logic diagram of a control method of an air conditioner according to the present invention.
List of reference numerals
1. An outdoor unit; 11. a compressor; 12. a four-way valve; 13. an outdoor heat exchanger; 14. An outer fan; 15. an electronic expansion valve; 16. a controller; 17. an outdoor temperature sensor; 18. an outlet temperature sensor; 2. an indoor unit; 21. an indoor heat exchanger; 22. an inner fan; 23. an air outlet temperature sensor; 31. a first electrical heating section; 32. a second electrical heating section.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the following embodiments describe each step as a sequential order, those skilled in the art can understand that, in order to achieve the effect of the present embodiments, different steps need not be executed in such an order, and they may be executed simultaneously (in parallel) or in an inverse order, and these simple variations are within the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
First, referring to fig. 1, the structure of the air conditioner of the present invention will be described. Fig. 1 is a system diagram of an air conditioner according to the present invention, in which a solid line represents a connection line and a dotted line represents a control line.
As shown in fig. 1, the air conditioner of the present application includes an outdoor unit 1 and an indoor unit 2, the outdoor unit 1 includes a compressor 11, a four-way valve 12, an outdoor heat exchanger 13, an external fan 14, an electronic expansion valve 15, and a controller 16, and the indoor unit 2 mainly includes an indoor heat exchanger 21 and an internal fan 22. The compressor 11, the four-way valve 12, the indoor heat exchanger 21, the electronic expansion valve 15 and the outdoor heat exchanger 13 are connected through pipelines to form a refrigerant cycle, and the compressor 11, the four-way valve 12, the electronic expansion valve 15, the inner fan 22 and the outer fan 14 are respectively connected with the controller 16, so that the controller 16 controls the work of the two.
The outdoor heat exchanger 13 is further provided with a first electric heating section 31 and a second electric heating section 32 independent from each other, and the first electric heating section 31 and the second electric heating section 32 can directly or indirectly heat the refrigerant flowing through the outdoor heat exchanger 13. The first electric heating section 31 and the second electric heating section 32 may be both provided as electric heating tapes, the electric heating tapes are wound around the heat exchange tubes of the outdoor heat exchanger 13, and an insulating layer is further wrapped around the outer side of each electric heating tape. The first electric heating section 31 and the second electric heating section 32 are both connected to the controller 16 so that the controller 16 can control the opening and closing thereof.
The first and second electric heating tapes 31 and 32 are not limited and may be modified by those skilled in the art on the premise that direct or indirect heating of the refrigerant flowing through the outdoor heat exchanger 13 can be achieved. For example, the first electric heating belt 31 and the second electric heating belt 32 may employ an electric heating plate disposed between two heat exchange pipes of the outdoor heat exchanger 13, in addition to both the electric heating belts, and indirectly heat the refrigerant in the outdoor heat exchanger 13 when the first electric heating belt 31 and the second electric heating belt 32 are turned on. For another example, the first electric heating belt 31 and the second electric heating belt 32 may also adopt heating wires, heating rods, heating pipes, etc., and the heating belts may be directly disposed in the heat exchange pipe, and the purpose of directly heating the refrigerant in the heat exchange pipe can be achieved by placing their connection terminals outside the heat exchange pipe to connect the power supply and the controller 16.
With continued reference to fig. 1, an outdoor temperature sensor 17 for detecting an outdoor ambient temperature is further disposed in the outdoor unit 1, and the outdoor temperature sensor 17 is connected to the controller 16, so that the controller 16 can control the opening and closing of the first electric heating section 31 and the second electric heating section 32 based on the outdoor ambient temperature detected by the controller.
An outlet temperature sensor 18 for detecting the temperature of the refrigerant at the outlet of the outdoor heat exchanger 13 is further disposed at the outlet of the outdoor heat exchanger 13, and the outlet temperature sensor 18 is connected to the controller 16, so that the controller 16 can control the opening and closing of the first electric heating section 31 and the second electric heating section 32 based on the detected temperature of the refrigerant at the outlet of the outdoor heat exchanger 13.
An air outlet temperature sensor 23 capable of detecting the air outlet temperature of the indoor unit 2 is further disposed at the air outlet of the indoor unit 2, and the air outlet temperature sensor 23 is connected to the controller 16, so that the controller 16 can control the opening and closing of the first electric heating section 31 and the second electric heating section 32 based on the detected air outlet temperature of the indoor unit 2.
Next, a control method of the air conditioner of the present application will be described with reference to fig. 2. Fig. 2 is a flowchart illustrating a control method of an air conditioner according to the present invention.
As shown in fig. 2, in order to solve the problem of poor control accuracy of the conventional auxiliary electric heater, the control method of the present application mainly includes the following steps:
s100, detecting the outdoor environment temperature when the air conditioner is in heating operation; for example, after the air conditioner receives an instruction for heating operation, the temperature of the outdoor environment is detected by the outdoor temperature sensor.
S200, when the outdoor environment temperature is less than or equal to the preset temperature, starting a first electric heating section; for example, the preset temperature is-5 ℃, when the outdoor temperature sensor detects that the outdoor temperature is-10 ℃, the outdoor temperature is lower, if the air conditioner is normally heated, the heat exchange effect of the outdoor heat exchanger is poor, the integral heating capacity of the air conditioner is low, the air outlet temperature of the indoor unit is low, the heating effect is affected, at the moment, the controller controls the first electric heating section to be opened, so that the refrigerant in the outdoor heat exchanger is heated, the outdoor heat exchanger is assisted to perform heat exchange, the evaporation temperature and the evaporation pressure of the outdoor heat exchanger are improved, and the heating capacity of the air conditioner is improved.
S300, detecting the air outlet temperature of the indoor unit every other first preset time period after the first electric heating section is started; for example, the first preset time period is 1min, and after the first electric heating section is started, the air outlet temperature of the indoor unit is detected by an air outlet temperature sensor arranged in the indoor unit every 1min, so as to judge the operation effect of the air conditioner after the first electric heating section is started. Of course, the setting of the first preset time period is not limiting and may be adjusted by those skilled in the art.
S400, judging the sizes of the air outlet temperature and the first air outlet temperature threshold value; for example, after the outlet air temperature of the indoor unit is measured, the outlet air temperature is compared with a first outlet air temperature threshold value; the first outlet air temperature threshold may be a temperature value when the outlet air temperature of the indoor unit is high, and when the outlet air temperature reaches the threshold, it is proved that the outlet air temperature of the indoor unit is high, and a user may be scalded due to the high outlet air temperature.
S500, when the air outlet temperature is larger than or equal to the first air outlet temperature threshold value, increasing the rotating speed of the inner fan; for example, when the outlet air temperature is greater than the first outlet air temperature threshold, it is proved that the outlet air temperature is higher at this time, which easily causes scalding, and the rotation speed of the inner fan is increased, for example, 200r/min is increased on the basis of the current rotation speed, so as to increase the heat exchange between the indoor air and the indoor heat exchanger, and reduce the outlet air temperature, so that the outlet air temperature is reduced to a better interval.
Through the air-out temperature of every first preset time quantum detection indoor set after opening first electric heating section to when air-out temperature more than or equal to first air-out temperature threshold value, fan improvement rotational speed in the control, the control method of this application can improve auxiliary electric heating's control accuracy, maintains the heating volume invariable, under the condition of keeping electric heating to open the heat transfer of supplementary outdoor heat exchanger, avoids because the scald skin that air-out temperature leads to excessively high.
A more preferred embodiment of the control method of the air conditioner of the present application will be described with reference to fig. 3. Fig. 3 is a logic diagram of a control method of an air conditioner according to the present application.
As shown in fig. 3, in a possible embodiment, after step S400, the control method further includes: detecting the outlet temperature of the outdoor heat exchanger and the outlet air temperature of the indoor unit every other first preset time period; respectively judging the sizes of the outlet temperature and the first outlet temperature threshold value and the sizes of the outlet air temperature and the first outlet air temperature threshold value; and when the air outlet temperature is greater than or equal to the first air outlet temperature threshold value, the rotating speed of the inner fan is increased. And when the outlet temperature is less than the first outlet temperature threshold value and the outlet air temperature is less than the first outlet air temperature threshold value, the second electric heating section is started. And when the outlet temperature is greater than or equal to the first outlet temperature threshold and the outlet air temperature is less than the first outlet air temperature threshold, closing the first electric heating section.
The first outlet temperature threshold value can be a critical temperature value when the heat exchange effect of the outdoor heat exchanger is better, when the outlet temperature of the outdoor heat exchanger reaches or is about to reach the first outlet temperature threshold value, the heat exchange capacity of the outdoor heat exchanger reaches a better state, the evaporation temperature and the evaporation pressure of the outdoor heat exchanger are in a more ideal interval, and the threshold value can be determined through experiments. The first outlet air temperature threshold may be a temperature value when the outlet air temperature of the indoor unit is high, and when the outlet air temperature reaches the threshold, it is proved that the outlet air temperature of the indoor unit is high, and a user may be scalded due to the high outlet air temperature. For example, the first outlet temperature threshold may be selected to be any value from 5 ℃ to 20 ℃, preferably 18 ℃ or the like. The first outlet air temperature threshold value can be any value of 55-60 ℃, such as 55 ℃ and the like. Of course, the first outlet temperature threshold and the first outlet air temperature threshold may be determined through experiments, and for different types of air conditioners or different areas of use environments, the thresholds may be adjusted within an allowable range.
For example, taking the first outlet temperature threshold of 18 ℃ and the first outlet temperature threshold of 55 ℃ as an example, when the outlet air temperature is greater than 55 ℃, it is proved that the outlet air temperature is higher, if the outlet air temperature continuously rises, the outlet air is easily overhigh and scalds the skin, at this time, when the outlet air temperature is greater than 55 ℃, the rotating speed of the inner fan is controlled to be increased no matter how the outlet air temperature is, for example, 200r/min is increased on the basis of the current rotating speed, so as to increase the heat exchange between the indoor air and the indoor heat exchanger, and reduce the outlet air temperature, so that the outlet air temperature is reduced to a better interval.
When the outlet temperature is lower than 18 ℃, the heat exchange effect of the outdoor heat exchanger is proved to be not optimal at the moment, and the effect of only adopting the first electric heating section to heat the refrigerant in the outdoor heat exchanger is still not ideal. Similarly, when the outlet air temperature of the indoor unit is less than 55 ℃, it is proved that there is still room for the outlet air temperature of the indoor unit to rise so as to provide more comfortable outlet air temperature for users. Therefore, when the outlet temperature is lower than 18 ℃ and the outlet air temperature is lower than 55 ℃, the second electric heating section can be controlled to be opened, the electric heating power of the outdoor heat exchanger is further enhanced, the heat exchange effect of the outdoor heat exchanger is improved, and the outlet temperature and the outlet air temperature are improved.
When the outlet temperature is greater than or equal to 18 ℃, the heat exchange effect of the outdoor heat exchanger exceeds a better interval, which may bring adverse effects on the operation of the rear-end compressor, and further affect the operation stability and the heat exchange effect of the air conditioner. At this time, even if the outlet air temperature of the indoor unit is less than 55 ℃, the outlet air temperature still has a rising space, but in order to ensure the working life of the compressor and avoid the bad operation of the compressor, the first electric heating section should be controlled to be closed so as to reduce the risk of the bad operation of the compressor.
With continued reference to fig. 3, in one possible embodiment, after increasing the inner fan rotation speed, i.e., after step S500, the control method further includes: detecting the outlet temperature of the outdoor heat exchanger and the outlet air temperature of the indoor unit every second preset time period; respectively judging the sizes of the outlet temperature and the first outlet temperature threshold value and the sizes of the outlet air temperature and the first outlet air temperature threshold value; and controlling the opening and closing of the first electric heating section and the rotating speed of the inner fan based on the judgment result. Specifically, when the outlet temperature is greater than or equal to a first outlet temperature threshold and/or the outlet air temperature threshold is still greater than or equal to a first outlet air temperature threshold, the first electric heating section is closed and the rotating speed of the inner fan is reduced; and when the outlet temperature is less than the first outlet temperature threshold and the outlet air temperature is less than the first outlet air temperature threshold, reducing the rotating speed of the inner fan.
The second preset time period may be set to be the same as the first preset time period, and is 1min, and of course, the time period may also be adjusted, for example, any value from 20s to 70s is selected.
For example, taking the second preset time as 30s, the first outlet temperature threshold as 18 ℃ and the first outlet temperature threshold as 55 ℃, the outlet temperature of the outdoor heat exchanger and the outlet temperature of the indoor unit are detected every 30s, and when the outlet temperature of the outdoor heat exchanger is detected to be greater than or equal to 18 ℃, it is proved that although the rotating speed of the indoor fan is increased by 200r/min and heat exchange is enhanced, the outlet temperature of the outdoor heat exchanger still exceeds the temperature range when the heat exchange effect is good, and adverse effects may be brought to the operation of the rear-end compressor, so that the operation stability and the heat exchange effect of the air conditioner are affected. Similarly, when the outlet air temperature of indoor set was more than or equal to 55 ℃, it was proved that although interior fan rotational speed promoted, outlet air temperature descended to some extent, this outlet air temperature did not descend to reasonable scope, still too high, if outlet air temperature lasted too high this moment, not only brought the not good heating experience for the user, still probably brought the risk of scalding skin. At the moment, when the two judgment conditions at least meet one of the two judgment conditions, the first electric heating section is controlled to be closed and the rotating speed of the inner fan is reduced, for example, the rotating speed of the inner fan is reduced by 200/rmin, so that the risk of poor operation of the compressor or overhigh outlet air temperature is reduced.
On the contrary, when the outlet temperature is less than 18 ℃, the heat exchange effect of the outdoor heat exchanger is reduced or still not optimal after the rotating speed of the internal fan is increased. Similarly, when the outlet air temperature of the indoor unit is less than 55 ℃, the outlet air temperature of the indoor unit is proved to be reduced to a reasonable range after the rotating speed of the inner fan is increased. Therefore, when the outlet temperature is less than 18 ℃ and the outlet air temperature is less than 55 ℃, the current operation state can be maintained without any adjustment, and the rotating speed of the inner fan can be properly reduced, for example, on the premise of increasing the rotating speed by 200r/min, the rotating speed of the inner fan is controlled to be reduced by 50r/min, and at the moment, the outlet temperature of the outdoor heat exchanger and the outlet air temperature of the indoor unit are both increased, thereby being beneficial to realizing better heating effect and ensuring that the heating quantity is in a better interval.
Further, in a possible embodiment, after the first electric heating section is turned off, the control method further includes: detecting the outlet temperature of the outdoor heat exchanger and the outlet air temperature of the indoor unit every a third preset time period; respectively judging the outlet temperature and the second outlet temperature threshold value and the outlet air temperature and the second outlet air temperature threshold value; and when the outlet temperature is greater than or equal to the second outlet temperature threshold and/or the outlet air temperature is greater than or equal to the second outlet air temperature threshold, keeping the first electric heating section closed. When the outlet temperature is lower than a second outlet temperature threshold and the outlet air temperature is lower than a second outlet air temperature threshold, starting the first electric heating section; and the second outlet temperature threshold is smaller than the first outlet temperature threshold, and the second outlet air temperature threshold is smaller than the first outlet air temperature threshold.
In this application, close first electric heating section both can be in outlet temperature more than or equal to first outlet temperature threshold, and close first electric heating section when the air-out temperature is less than first air-out temperature threshold, also can be including further judging outlet temperature more than or equal to first outlet temperature threshold after the fan rotational speed improves, and/or when air-out temperature threshold still more than or equal to first air-out temperature threshold, close first electric heating section and reduce the rotational speed of interior fan.
The third preset time period may be adjusted based on a test or an actual situation, for example, the third preset time period may be set to 10s to 40s, etc. in consideration of that the temperature of the outdoor heat exchanger is fast decreased due to a low outdoor ambient temperature after the first electric heating section is turned off. Of course, if the outdoor ambient temperature is lower than the preset temperature value but the temperature value is relatively high, the third preset time period may be extended to 50s, 60s, or even 70 s. The second outlet temperature threshold value can be a critical temperature value when the heat exchange effect of the outdoor heat exchanger is poor, and when the outlet temperature of the outdoor heat exchanger is reduced to or is about to be reduced to the second outlet temperature threshold value, the heat exchange capacity of the outdoor heat exchanger is reduced to a poor state; the second outlet air temperature threshold value can be a temperature value when the outlet air temperature of the indoor unit is lower, when the outlet air temperature is reduced to the threshold value, the outlet air temperature of the indoor unit is proved to be lower, and if the outlet air temperature is continuously reduced, the user can be provided with a cooler outlet air feeling. The second outlet temperature threshold may be selected from any value of 0 ℃ to 5 ℃, such as 3 ℃. The second outlet air temperature threshold can be selected from any value of 40-50 ℃, such as 45 ℃ and the like. The second outlet temperature threshold and the second outlet air temperature threshold can be determined through experiments, and for air conditioners of different models or use environments of different regions, the thresholds can be adjusted within an allowable range.
For example, taking the third preset time period as 20s, the second outlet temperature threshold as 3 ℃ and the second outlet temperature threshold as 45 ℃, the outlet temperature of the outdoor heat exchanger and the outlet temperature of the indoor unit are collected every 20s, and when the outlet temperature is less than 3 ℃, the heat exchange effect of the outdoor heat exchanger is poor and the overall heating capacity of the air conditioner is insufficient. Similarly, when the outlet air temperature of the indoor unit is less than 45 ℃, the outlet air temperature of the indoor unit is proved to be low, and the user can be provided with a cool outlet air feeling. Therefore, when the outlet temperature is lower than 3 ℃ and the outlet air temperature is lower than 45 ℃, the first electric heating section can be restarted to perform auxiliary heat exchange on the outdoor heat exchanger, improve the heat exchange effect of the outdoor heat exchanger, improve the outlet temperature and the outlet air temperature, and maintain the heat exchange effect of the outdoor heat exchanger and the outlet air temperature of the indoor unit to be always kept in a reasonable interval.
On the contrary, when the outlet temperature is more than or equal to 3 ℃, the heat exchange effect of the outdoor heat exchanger is still in a better range, and the operation stability and the heat exchange effect of the air conditioner can be still ensured although the operation stability and the heat exchange effect are reduced to some extent. Similarly, when the outlet air temperature of the indoor unit is greater than or equal to 45 ℃, although the outlet air temperature is reduced, the outlet air temperature is still within an acceptable range. At the moment, when the two judgment conditions at least meet one of the two judgment conditions, the first electric heating section is controlled to be kept closed so as to maintain the current running state and save energy.
With continued reference to fig. 3, in one possible embodiment, after the second electrical heating segment is activated, the control method further includes: detecting the outlet temperature of the outdoor heat exchanger and the outlet air temperature of the indoor unit every fourth preset time period; respectively judging the sizes of the outlet temperature and the first outlet temperature threshold value and the sizes of the outlet air temperature and the first outlet air temperature threshold value; and controlling the rotation speed of the inner fan and the opening and closing of the second electric heating section based on the judgment result. Specifically, when the outlet air temperature is greater than or equal to the first outlet air temperature threshold, the rotating speed of the inner fan is increased; when the outlet temperature is greater than or equal to the first outlet temperature threshold and the outlet air temperature is less than the first outlet air temperature threshold, closing the second electric heating section; and when the outlet temperature is less than the first outlet temperature threshold value and the outlet air temperature is less than the first outlet air temperature threshold value, keeping the second electric heating section open.
The fourth preset time period is similar to the other preset time periods, and may be determined based on experiments or selected based on a specific application scenario. If the heating power is higher after the second electric heating section is turned on, the second preset time period can be adjusted to a time slightly shorter than the first preset time period, such as 10s-40 s.
For example, taking the fourth preset time period as 30s, the first outlet temperature threshold as 18 ℃ and the first outlet temperature threshold as 55 ℃, the outlet temperature of the outdoor heat exchanger and the outlet temperature of the indoor unit are detected every 30s, when the outlet temperature is greater than 55 ℃, it is proved that the outlet temperature is higher at this time, and scald is easily caused, and at this time, the rotation speed of the inner fan is increased, for example, 200r/min is increased on the basis of the current rotation speed, so as to increase the heat exchange between the indoor air and the indoor heat exchanger, and reduce the outlet temperature, so that the outlet temperature is reduced to a better interval. Meanwhile, because the heat exchange of the indoor heat exchanger is more sufficient, the outlet temperature of the outdoor heat exchanger can be partially reduced, and the outlet temperature of the outdoor heat exchanger is not too high.
When the outlet temperature is greater than or equal to 18 ℃, the heat exchange effect of the outdoor heat exchanger exceeds a better interval, which may bring adverse effects on the operation of the rear-end compressor, and further affect the operation stability and the heat exchange effect of the air conditioner. At this time, even if the outlet air temperature of the indoor unit is less than 55 ℃, the outlet air temperature still has a rising space, but in order to guarantee the working life of the compressor and avoid the bad operation of the compressor, the second electric heating section should be controlled to be closed so as to reduce the risk of the bad operation of the compressor and maintain the heat exchange effect of the outdoor heat exchanger and the outlet air temperature of the indoor unit to be always kept in a reasonable interval.
When the outlet temperature is lower than 18 ℃, the heat exchange effect of the outdoor heat exchanger is not optimal, and the ideal effect of heating the refrigerant in the outdoor heat exchanger by adopting the first electric heating section and the second electric heating section is not achieved. Similarly, when the outlet air temperature of the indoor unit is less than 55 ℃, it is proved that there is still room for the outlet air temperature of the indoor unit to rise so as to provide more comfortable outlet air temperature for users. Therefore, when the outlet temperature is lower than 18 ℃ and the outlet air temperature is lower than 55 ℃, the current operation state can be maintained, namely, the first electric heating section and the second electric heating section are controlled to be both opened, and whether the closing condition is met is further judged when the next judgment time point comes.
With continued reference to fig. 3, in one possible embodiment, after the step of turning on the second electric heating section and increasing the rotation speed of the inner fan, the control method further includes: detecting the outlet temperature of the outdoor heat exchanger and the outlet air temperature of the indoor unit every fifth preset time period; respectively judging the sizes of the outlet temperature and the first outlet temperature threshold value and the sizes of the outlet air temperature and the first outlet air temperature threshold value; and controlling the opening and closing of the second electric heating section and the rotating speed of the inner fan based on the judgment result. Specifically, when the outlet temperature is greater than or equal to the first outlet temperature threshold and/or the outlet air temperature threshold is still greater than or equal to the first outlet air temperature threshold, the second electric heating section is closed and the rotating speed of the inner fan is reduced; and when the outlet temperature is less than the first outlet temperature threshold and the outlet air temperature is less than the first outlet air temperature threshold, reducing the rotating speed of the inner fan.
The fifth preset time period may be set in the same manner as the second preset time period, or in other manners, which is not described herein again. For example, the fifth preset time period is any value from 20s to 70 s. For example, taking the second preset time as 30s, the first outlet temperature threshold as 18 ℃ and the first outlet temperature threshold as 55 ℃, the outlet temperature of the outdoor heat exchanger and the outlet temperature of the indoor unit are detected every 30s, and when the outlet temperature of the outdoor heat exchanger is detected to be greater than or equal to 18 ℃, it is proved that although the rotating speed of the indoor fan is increased by 200r/min and heat exchange is enhanced, the outlet temperature of the outdoor heat exchanger still exceeds the temperature range when the heat exchange effect is good, and adverse effects may be brought to the operation of the rear-end compressor, so that the operation stability and the heat exchange effect of the air conditioner are affected. Similarly, when the outlet air temperature of indoor set was more than or equal to 55 ℃, it was proved that although interior fan rotational speed promoted, outlet air temperature descended to some extent, this outlet air temperature did not descend to reasonable scope, still too high, if outlet air temperature lasted too high this moment, not only brought the not good heating experience for the user, still probably brought the risk of scalding skin. At the moment, when the two judgment conditions at least meet one of the two judgment conditions, the second electric heating section is controlled to be closed and the rotating speed of the inner fan is reduced, if the rotating speed of the inner fan is reduced by 200/rmin, the risk of poor operation of the compressor or overhigh air outlet temperature is reduced, and the heat exchange effect of the outdoor heat exchanger and the air outlet temperature of the indoor unit are always kept in a reasonable interval.
On the contrary, when the outlet temperature is less than 18 ℃, the heat exchange effect of the outdoor heat exchanger is reduced or still not optimal after the rotating speed of the internal fan is increased. Similarly, when the outlet air temperature of the indoor unit is less than 55 ℃, it is proved that the outlet air temperature of the indoor unit is reduced to a reasonable range after the rotating speed of the inner fan is increased. Therefore, when the outlet temperature is less than 18 ℃ and the outlet air temperature is less than 55 ℃, the current operation state can be kept without any adjustment, and the rotating speed of the inner fan can be properly reduced, for example, on the premise of increasing the rotating speed by 200r/min, the rotating speed of the inner fan is controlled to be reduced by 50r/min, and at the moment, the outlet temperature of the outdoor heat exchanger and the outlet air temperature of the indoor unit are both increased, so that a better heating effect can be created, and the heating capacity can be ensured to be in a better interval.
In addition, in this embodiment, the preset temperature may be a temperature stored in the air conditioner at the time of factory shipment, or may be a temperature set by the user through a remote controller, a mobile phone APP, or the like, and when the user sets the preset temperature by himself, the air conditioner receives the temperature and stores it in the storage device of the air conditioner, and calls the preset temperature when the control method is executed.
It should be noted that although the detailed steps of the method of the present invention have been described in detail, those skilled in the art can combine, separate and change the order of the above steps without departing from the basic principle of the present invention, and the modified technical solution does not change the basic concept of the present invention and thus falls into the protection scope of the present invention.
A possible control flow of the air conditioner of the present invention will be briefly described with reference to fig. 3.
In one possible embodiment, as shown in fig. 3, the user turns on the air conditioner and selects the heating mode → first the controllerControlling outdoor temperature sensor to detect outdoor ambient temperature ToAnd determining ToWhether the temperature is less than or equal to minus 5 ℃ is satisfied → when the judgment result is yes, the controller controls the first electric heating section to be started to heat the refrigerant in the outdoor heat exchanger, otherwise, the outdoor environment temperature is continuously detected → the first electric heating section is started, the controller controls the outlet temperature sensor to detect the outlet temperature T of the outdoor heat exchangercAnd controlling the air outlet temperature sensor to detect the air outlet temperature T of the indoor unitfJudgment of Tc< 18 ℃ and TfWhether < 55 ℃ is satisfied at the same time → if both judgment conditions are satisfied at the same time, the following step (1) is performed: the controller controls the second electric heating section to be started; otherwise, further judging TfWhether the temperature is more than or equal to 55 ℃ is established or not; when T isfWhen the temperature is more than or equal to 55 ℃, the following step (2) is executed: controlling the rotating speed of the inner fan to be increased by 200 r/min; otherwise, the following step (3) is performed: the first electrical heating section is turned off.
Step (1): after the second electric heating section is started, the outlet temperature T of the outdoor heat exchanger is respectively detected by the outdoor temperature sensor and the outlet temperature sensor againcAnd the outlet air temperature T of the indoor unitfAnd determining Tc< 18 ℃ and TfWhether < 55 ℃ holds at the same time → if so, the controller controls the first electric heating section and the second electric heating section to remain on at the same time and returns to continue to the outlet temperature TcAnd the outlet air temperature TfCarrying out detection; otherwise, further judging TfWhether the temperature is more than or equal to 55 ℃ is established or not; when T isfWhen the temperature is more than or equal to 55 ℃, controlling the rotating speed of the inner fan to be increased by 200 r/min; otherwise, the second electric heating section is closed, and the operation returns to continuously obtain the outlet temperature TcAnd the outlet air temperature TfAnd a control loop is performed. After the rotating speed of the inner fan is increased by 200r/min, the outlet temperature T of the outdoor heat exchanger is detected by the outdoor temperature sensor and the outlet temperature sensor respectively againcAnd the outlet air temperature T of the indoor unitfAnd determining TcNot less than 18 ℃ and TfWhether at least one of the two judgment conditions is satisfied is larger than or equal to 5 → if at least one of the two judgment conditions is satisfied, the first electric heating section is closed, and the rotating speed of the inner fan is controlled to be reduced by 200 r/min; otherwise, if neither is true,controlling the rotating speed of the inner fan to reduce by 50r/min and returning to continue to control the outlet temperature TcAnd the outlet air temperature TfDetecting → after the second electric heating section is closed and the rotating speed of the inner fan is controlled to be reduced by 200r/min, returning to continuously obtain the outlet temperature TcAnd the outlet air temperature TfAnd a control loop is performed.
Step (2): when the rotating speed of the inner fan is increased by 200r/min, the outlet temperature T of the outdoor heat exchanger is detected by the outdoor temperature sensor and the outlet temperature sensor respectively againcAnd the outlet air temperature T of the indoor unitfAnd determining TcNot less than 18 ℃ and TfWhether at least one of the temperature is more than or equal to 5 ℃ is satisfied → if at least one of the two judgment conditions is satisfied, the first electric heating section is closed and the rotating speed of the inner fan is controlled to be reduced by 200r/min, otherwise, if the temperature is not satisfied, the rotating speed of the inner fan is controlled to be reduced by 50r/min, and the temperature T of the outlet is returned to continue to be adjustedcAnd the outlet air temperature TfDetecting → after the first electric heating section is closed and the rotating speed of the inner fan is controlled to be reduced by 200r/min, respectively detecting the outlet temperature T of the outdoor heat exchanger by the outdoor temperature sensor and the outlet temperature sensor againcAnd the outlet air temperature T of the indoor unitfAnd determining Tc< 3 ℃ and TfWhether the temperature is less than 45 ℃ is simultaneously established → if so, the controller controls the first electric heating section to be started, otherwise, the controller controls the first electric heating section to be kept closed and returns to continue to carry out the temperature T on the outletcAnd the outlet air temperature TfAnd (6) detecting. After the first electric heating section is started, returning to continuously obtain the outlet temperature TcAnd the outlet air temperature TfAnd a control loop is performed.
And (3): after the first electric heating section is closed, the outlet temperature T of the outdoor heat exchanger is detected by the outdoor temperature sensor and the outlet temperature sensor respectivelycAnd the outlet air temperature T of the indoor unitfAnd determining Tc< 3 ℃ and TfWhether the temperature is less than 45 ℃ is simultaneously established → if so, the controller controls the first electric heating section to be started, otherwise, the controller controls the first electric heating section to be kept closed and returns to continue to carry out the temperature T on the outletcAnd the outlet air temperature TfAnd (6) detecting.After the first electric heating section is started, returning to continuously obtain the outlet temperature TcAnd the outlet air temperature TfAnd a control loop is performed.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A control method of an air conditioner, the air conditioner comprises an outdoor unit and an indoor unit, the indoor unit comprises an inner fan, the outdoor unit comprises an outdoor heat exchanger, and the outdoor heat exchanger is provided with a first electric heating section and a second electric heating section, and the control method comprises the following steps:
detecting the outdoor environment temperature when the air conditioner is in heating operation;
when the outdoor environment temperature is less than or equal to a preset temperature, starting the first electric heating section;
after the first electric heating section is started, detecting the air outlet temperature of the indoor unit every other first preset time period;
judging the sizes of the air outlet temperature and a first air outlet temperature threshold value;
and when the air outlet temperature is greater than or equal to the first air outlet temperature threshold value, the rotating speed of the inner fan is increased.
2. The control method of an air conditioner according to claim 1, wherein after the step of "increasing the rotation speed of the inner fan", the control method further comprises:
detecting the outlet temperature of the outdoor heat exchanger and the outlet air temperature of the indoor unit every second preset time period;
respectively judging the outlet temperature and a first outlet temperature threshold value and the outlet air temperature and a first outlet air temperature threshold value;
and controlling the opening and closing of the first electric heating section and the rotating speed of the inner fan based on the judgment result.
3. The control method of an air conditioner according to claim 2, wherein the step of controlling the opening and closing of the first electric heating section and the rotation speed of the inner fan based on the determination result further comprises:
and when the outlet temperature is greater than or equal to the first outlet temperature threshold and/or the outlet air temperature threshold is still greater than or equal to the first outlet air temperature threshold, closing the first electric heating section and reducing the rotating speed of the inner fan.
4. The control method of an air conditioner according to claim 1, further comprising:
detecting the outlet temperature of the outdoor heat exchanger every other first preset time period;
judging the magnitude of the outlet temperature and a first outlet temperature threshold value;
and when the outlet temperature is greater than or equal to the first outlet temperature threshold value and the outlet air temperature is less than the first outlet air temperature threshold value, closing the first electric heating section.
5. The control method of an air conditioner according to claim 3 or 4, wherein after the step of turning off the first electric heating section, the control method further comprises:
detecting the outlet temperature of the outdoor heat exchanger and the outlet air temperature of the indoor unit every a third preset time period;
respectively judging the outlet temperature and a second outlet temperature threshold value and the outlet air temperature and a second outlet air temperature threshold value;
when the outlet temperature is lower than the second outlet temperature threshold value and the outlet air temperature is lower than the second outlet air temperature threshold value, the first electric heating section is started;
and the second outlet temperature threshold is smaller than the first outlet temperature threshold, and the second outlet temperature threshold is smaller than the first outlet temperature threshold.
6. The control method of an air conditioner according to claim 1, further comprising:
detecting the outlet temperature of the outdoor heat exchanger every other first preset time period;
judging the magnitude of the outlet temperature and a first outlet temperature threshold value;
and when the outlet temperature is smaller than the first outlet temperature threshold value and the air outlet temperature is smaller than the first air outlet temperature threshold value, the second electric heating section is started.
7. The control method of an air conditioner according to claim 6, wherein after the step of turning on the second electric heating section, the control method further comprises:
detecting the outlet temperature of the outdoor heat exchanger and the outlet air temperature of the indoor unit every fourth preset time period;
respectively judging the outlet temperature and the first outlet temperature threshold value and the outlet air temperature and the first outlet air temperature threshold value;
and when the air outlet temperature is greater than or equal to the first air outlet temperature threshold value, the rotating speed of the inner fan is increased.
8. The control method of an air conditioner according to claim 7, wherein after the step of "increasing the rotation speed of the inner fan", the control method further comprises:
detecting the outlet temperature of the outdoor heat exchanger and the outlet air temperature of the indoor unit every fifth preset time period;
respectively judging the outlet temperature and a first outlet temperature threshold value and the outlet air temperature and a first outlet air temperature threshold value;
and controlling the opening and closing of the second electric heating section and the rotating speed of the inner fan based on the judgment result.
9. The control method of an air conditioner according to claim 8, wherein the step of controlling the opening and closing of the second electric heating section and the rotation speed of the inner fan based on the determination result further comprises:
and when the outlet temperature is greater than or equal to the first outlet temperature threshold and/or the outlet air temperature threshold is still greater than or equal to the first outlet air temperature threshold, closing the second electric heating section and reducing the rotating speed of the inner fan.
10. The control method of an air conditioner according to claim 7, further comprising:
when the outlet temperature is greater than or equal to the first outlet temperature threshold and the outlet air temperature is less than the first outlet air temperature threshold, closing the second electric heating section;
and when the outlet temperature is smaller than the first outlet temperature threshold value and the outlet air temperature is smaller than the first outlet air temperature threshold value, keeping the second electric heating section open.
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| CN113091316A (en) * | 2021-03-29 | 2021-07-09 | 青岛海尔空调器有限总公司 | Heating assembly inside fan heater, fan heater and heating control method of fan heater |
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Application publication date: 20200421 |