CN108489046B - Cleaning method and system and air conditioner - Google Patents
Cleaning method and system and air conditioner Download PDFInfo
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- CN108489046B CN108489046B CN201810258959.3A CN201810258959A CN108489046B CN 108489046 B CN108489046 B CN 108489046B CN 201810258959 A CN201810258959 A CN 201810258959A CN 108489046 B CN108489046 B CN 108489046B
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
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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
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- Air Conditioning Control Device (AREA)
Abstract
The invention provides a cleaning method, a cleaning system and an air conditioner, which are used for cleaning an evaporator of the air conditioner, wherein the cleaning method comprises the following steps: when the air conditioner continuously operates for a preset first time period in a refrigeration or dehumidification state, heating operation is performed; otherwise, firstly entering a refrigeration cleaning mode for operation, and then carrying out heating operation. The cleaning method, the cleaning system and the air conditioner can sterilize the evaporator and clean the evaporator at the same time, so that a good cleaning effect is achieved.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to a cleaning method and system and an air conditioner.
Background
Air conditioners used in daily life have a large amount of dust and dirt in the air conditioners after being placed or used for a long time. The dust is attached to the heat exchanger, so that a large amount of bacteria are easily bred on the evaporator, the heat exchange efficiency of the evaporator can be reduced due to the accumulation of the dust and the bacteria, the dust and the bacteria can be discharged into the environment along with the use of the air conditioner, the environment is polluted, peculiar smell can be generated, the cleanliness and the comfort degree of the environment are damaged, and the health of a user is influenced.
Disclosure of Invention
In view of the above, the present invention is directed to a cleaning method, a cleaning system and an air conditioner, so as to achieve self-cleaning of the air conditioner.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a cleaning method for cleaning an evaporator of an air conditioner, the method comprising:
when the air conditioner continuously operates for a preset first time period in a refrigeration or dehumidification state, heating operation is performed;
otherwise, firstly entering a refrigeration cleaning mode for operation, and then carrying out heating operation.
Further, the method further comprises:
and stopping the heating operation after a preset second time period of the heating operation or when the air conditioner enters a load protection state.
Further, the operation in the cooling and cleaning mode is firstly performed, and then the heating operation is performed, including:
when the air conditioner enters a refrigeration and cleaning mode to operate for a preset third time period, heating operation is carried out; or
And when the air conditioner enters a refrigerating and cleaning mode and the temperature of the evaporator is lower than a preset first temperature threshold value, heating operation is carried out.
Further, the air conditioner comprises an indoor fan, and when the air conditioner performs heating operation, the method further comprises the following steps:
when the temperature of the evaporator is greater than or equal to a second preset temperature threshold value, controlling the indoor fan to operate at a medium rotating speed;
when the temperature of the evaporator is greater than or equal to a preset third temperature threshold and less than the second temperature threshold, controlling the indoor fan to maintain the current rotating speed;
and when the temperature of the evaporator is less than the third temperature threshold value, controlling the indoor fan to operate at a low speed.
Further, the air conditioner further includes an outdoor fan, and when the air conditioner performs heating operation, the method further includes:
when the temperature of the evaporator is greater than or equal to a preset fourth temperature threshold value, controlling the outdoor fan to stop, wherein the fourth temperature threshold value is greater than the second temperature threshold value;
when the temperature of the evaporator is greater than or equal to a preset fifth temperature threshold and less than a fourth temperature threshold, controlling the outdoor fan to maintain the current rotating speed;
and when the temperature of the evaporator is less than the fifth temperature threshold value, controlling the outdoor fan to operate at a high speed.
Compared with the prior art, the cleaning method has the following advantages:
(1) the cleaning method provided by the invention can be used for sterilizing the evaporator and cleaning the evaporator at the same time by controlling the evaporator to continuously operate for a period of time in a refrigeration or dehumidification state of the air conditioner and then perform heating operation, or performing heating operation after entering a refrigeration cleaning mode, so that a very good cleaning effect is achieved.
Another objective of the present invention is to provide a cleaning system to achieve continuous and effective self-cleaning of the air conditioner.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a cleaning system is applied to an air conditioner and comprises a controller and an evaporator, wherein the controller is electrically connected with the evaporator;
the controller is used for sending a heating control signal to the evaporator when the air conditioner continuously operates for a preset first time period in a refrigeration or dehumidification state or the evaporator operates in a refrigeration cleaning mode;
the evaporator is used for heating operation after receiving the heating control signal.
Further, the controller is further configured to send a stop control signal to the evaporator after the evaporator is operated for a predetermined second time period in a heating mode or when the air conditioner enters a load protection state;
the evaporator is used for stopping heating operation according to the stop control information.
Further, the cleaning system further comprises a first temperature sensor for detecting the temperature of the evaporator;
the controller is used for sending the heating control signal to the evaporator after the evaporator enters a refrigeration and cleaning mode and operates for a preset third time period; or
And when the evaporator enters a cooling and washing mode and the temperature of the evaporator is lower than a preset first temperature threshold value, sending the heating control signal to the evaporator.
Further, the cleaning system further comprises an indoor fan, and when the cleaning system is in heating operation, the controller is further used for controlling the indoor fan to operate at a medium rotating speed when the temperature of the evaporator is greater than or equal to a second preset temperature threshold;
when the temperature of the evaporator is greater than or equal to a preset third temperature threshold and less than the second temperature threshold, controlling the indoor fan to maintain the current rotating speed; and
and when the temperature of the evaporator is less than the third temperature threshold value, controlling the indoor fan to operate at a low speed.
Compared with the prior art, the cleaning system has the following advantages:
(1) the cleaning system provided by the invention continuously operates for a period of time in a refrigeration or dehumidification state of the air conditioner and then performs heating operation, or after the cleaning system enters a refrigeration and cleaning mode to operate, a heating control signal is sent to the evaporator through the controller to control the evaporator to perform heating operation, so that the evaporator can be cleaned while being sterilized, and a very good cleaning effect is achieved.
It is still another object of the present invention to provide an air conditioner to achieve a continuous and effective self-cleaning.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an air conditioner comprising the cleaning system of any of the above.
Compared with the prior art, the air conditioner has the following advantages:
(1) the air conditioner provided by the invention continuously operates for a period of time in a refrigeration or dehumidification state and then performs heating operation, or after the air conditioner enters a refrigeration and cleaning mode to operate, a heating control signal is sent to the evaporator through the controller to control the evaporator to perform heating operation, so that the evaporator can be cleaned while being sterilized, and a very good cleaning effect is achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a block schematic diagram of a cleaning system according to an embodiment of the present invention;
FIG. 2 is a block schematic diagram of another cleaning system according to an embodiment of the present invention;
fig. 3 is a flow chart of a cleaning method according to an embodiment of the invention.
Description of reference numerals:
1-a controller, 2-an evaporator, 3-a first temperature sensor, 4-an indoor fan, 5-an outdoor fan and 6-a second temperature sensor.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, a block diagram of a cleaning system for an air conditioner according to a preferred embodiment of the present invention is shown, the cleaning system includes a controller 1, an evaporator 2 and a first temperature sensor 3, and the controller 1 is electrically connected to the evaporator 2 and the first temperature sensor 3 respectively for signal interaction. The controller 1 is a main control panel of an air conditioner.
The controller 1 is configured to send a heating control signal to the evaporator 2 when the air conditioner is continuously operated in a cooling or dehumidifying state for a predetermined first time period or the evaporator 2 is operated in a cooling and washing mode. The evaporator 2 is used for heating operation upon receiving a heating control signal.
Specifically, the controller 1 may obtain an operation state of the air conditioner in real time, and if the air conditioner has been continuously operated for a predetermined first time period in a cooling or dehumidifying state, it indicates that there is enough frost or condensed water for cleaning the air conditioner in the evaporator 2, at this time, the controller 1 sends a heating control signal to the evaporator 2, and the evaporator 2 performs a heating operation after receiving the heating control signal. If the operation time of the air conditioner in the refrigeration or dehumidification state does not reach the first time period, it indicates that there is not enough frost or condensate water to clean the air conditioner in the evaporator 2, at this time, the controller 1 sends a refrigeration control signal to the evaporator 2, the evaporator 2 performs refrigeration operation after receiving the refrigeration control signal, and the controller 1 sends a heating control signal to the evaporator 2 again after the evaporator 2 performs refrigeration operation and generates frost enough for cleaning the evaporator to control the evaporator 2 to perform heating operation.
The controller 1 is further configured to send a stop control signal to the evaporator 2 when the evaporator 2 is in the heating operation for a predetermined second time period, and the evaporator 2 is configured to stop the heating operation according to the stop control signal. Thus, when the evaporator 2 is heated and sterilized, the heating and sterilizing state can be automatically exited.
Further, the controller 1 is further configured to send a stop control signal to the evaporator 2 when the air conditioner enters the load protection state, so as to prevent the evaporator 2 from heating when the air conditioner enters the load protection state, and avoid damage.
In the embodiment of the present invention, the first time period and the second time period may be set according to specific situations, and the first time period is set to meet a requirement that after the air conditioner continuously operates in the cooling or dehumidifying state for the first time period, sufficient frost or condensed water can be generated in the evaporator 2 (the frost is generated in the evaporator 2 in the cooling mode, and the condensed water is generated in the evaporator 2 in the dehumidifying mode) to clean the air conditioner. Optionally, the first time period is preferably 30min or more, for example, 30min, 40min or 60 min. The second time period is set to be sufficient to kill bacteria in the evaporator 2 after the second time period of continuous heating operation. Optionally, the second time period is preferably 10min or more, for example, 10min, 20min or 30 min.
In the embodiment of the present invention, the controller 1 is configured to send a heating control signal to the evaporator 2 after the evaporator 2 enters the cooling and washing mode for a predetermined third time period, or send a heating control signal to the evaporator 2 when the evaporator 2 enters the cooling and washing mode and the temperature of the evaporator 2 is lower than a preset first temperature threshold.
Specifically, first temperature sensor 3 is used for detecting the temperature of evaporimeter 2, when getting into the cooling washing mode, evaporimeter 2 refrigeration operation, the temperature in evaporimeter 2 reduces gradually and produces the frost, temperature in first temperature sensor 3 real-time detection evaporimeter 2 feeds back controller 1, if first temperature sensor 3 detects that the temperature in evaporimeter 2 is less than the first temperature threshold value of preset, it has been used for carrying out abluent frost to produce in the evaporimeter 2 to explain, controller 1 sends the heating control signal to evaporimeter 2 this moment, evaporimeter 2 carries out the heating operation after receiving the heating control signal. If the temperature in the evaporator 2 does not reach the first temperature threshold after entering the cooling and washing mode, but the cooling and washing mode is operated for a predetermined third time period, it indicates that the evaporator 2 has been operated for a sufficient time, and frost that can be used for washing the evaporator 2 is generated in the evaporator, at this time, the controller 1 sends a heating control signal to the evaporator 2, and the evaporator 2 performs heating operation after receiving the heating control signal.
In the embodiment of the present invention, the value of the first temperature threshold is required to satisfy that when the temperature in the evaporator 2 reaches the threshold, the frost is generated in the evaporator 2 enough for cleaning the evaporator. Optionally, the first temperature threshold is preferably-20 ℃ or below, such as-20 ℃, -22 ℃, or-25 ℃.
Further, in the embodiment of the present invention, the controller 1 may further control the evaporator 2 to be maintained within a constant temperature range during the heating or cooling operation. Referring to fig. 2, the cleaning system further includes an indoor fan 4, an outdoor fan 5 and a second temperature sensor 6 for detecting an indoor ambient temperature of the air conditioner, and the controller 1 is further electrically connected to the indoor fan 4, the outdoor fan 5 and the second temperature sensor 6 respectively for signal interaction.
The controller 1 is further configured to control the indoor fan 4 to operate at a medium speed when the temperature of the evaporator 2 is greater than or equal to a second preset temperature threshold; when the temperature of the evaporator 2 is greater than or equal to a preset third temperature threshold and less than a second temperature threshold, controlling the indoor fan 4 to maintain the current rotating speed; and controlling the indoor fan 4 to operate at a low speed when the temperature of the evaporator 2 is less than the third temperature threshold.
Specifically, during heating operation, the rotating speed of the indoor fan 4 affects the heating effect of the evaporator 2, and in order to ensure that the temperature of the evaporator 2 can be maintained in a temperature range suitable for sterilization during heating, in the embodiment of the present invention, the controller 1 is preset with a second temperature threshold and a third temperature threshold for maintaining the temperature in the evaporator stable, the second temperature threshold is greater than the third temperature threshold, and the indoor fan 4 includes multiple rotating speed modes such as high speed, medium speed, and low speed. The first temperature sensor 3 detects the temperature in the evaporator 2 (the coil temperature of the evaporator 2) in real time and feeds the temperature back to the controller 1, the controller 1 controls the indoor fan 4 to operate at a low wind speed for a short time (for example, 10s) when the evaporator 2 operates in heating, the controller 1 compares the temperature of the evaporator 2 with a second temperature threshold and a third temperature threshold after the indoor fan 4 operates at a low speed for a short time, and when the temperature of the evaporator 2 is greater than or equal to the second temperature threshold which is preset, the indoor fan 4 is controlled to operate at a medium speed. When the temperature of the evaporator 2 is greater than or equal to the third temperature threshold and less than the second temperature threshold, the controller 1 controls the indoor fan 4 to maintain the current rotation speed. When the temperature of the evaporator 2 is less than the third temperature threshold, the indoor fan 4 is controlled to operate at a low speed. In this way, the temperature in the evaporator 2 can be maintained within a temperature range suitable for sterilization during heating, so that bacteria in the evaporator 2 can be effectively killed.
In the embodiment of the present invention, the second temperature threshold is preferably about 54 ℃, for example, 53 ℃, 54 ℃ or 55 ℃. The third temperature threshold is preferably about 48 ℃, for example, 47 ℃, 48 ℃ or 49 ℃.
The controller 1 is further configured to control the outdoor fan 5 to stop when the temperature of the evaporator 2 is greater than or equal to a preset fourth temperature threshold; when the temperature of the evaporator 2 is greater than or equal to a preset fifth temperature threshold and less than a fourth temperature threshold, controlling the outdoor fan 5 to maintain the current rotating speed; and controlling the outdoor fan 5 to operate at a high speed when the temperature of the evaporator 2 is less than the fifth temperature threshold.
Specifically, during the operation of the air conditioner, heat exchange is performed between the outdoor unit and the indoor unit, and the rotating speed of the outdoor fan 5 of the outdoor unit also affects the heating effect of the evaporator 2. In order to further ensure that the temperature of the evaporator 2 can be maintained in a temperature range suitable for sterilization during heating, the controller 1 is further preset with a fourth temperature threshold and a fifth temperature threshold for maintaining the temperature in the evaporator to be stable, the fourth temperature threshold is greater than the fifth temperature threshold and the second temperature threshold, and the outdoor fan 5 comprises a multi-speed mode of high speed, medium speed, low speed and the like. When the evaporator 2 is operated for heating, the controller 1 controls the indoor fan 4 to operate at a low wind speed for a short time, after the indoor fan 4 operates at a low speed for a short time, the controller 1 compares the temperature in the evaporator 2 with a fourth temperature threshold and a fifth temperature threshold, and when the temperature of the evaporator 2 is greater than or equal to a preset fourth temperature threshold, the controller 1 controls the outdoor fan 5 to stop. When the temperature of the evaporator 2 is greater than or equal to a preset fifth temperature threshold and less than a fourth temperature threshold, the controller 1 controls the outdoor fan 5 to maintain the current rotation speed. When the temperature of the evaporator 2 is less than the fifth temperature threshold, the controller 1 controls the outdoor fan 5 to operate at a high speed. In this way, the control of the indoor fan 4 and the outdoor fan 5 during the heating process can further maintain the temperature in the evaporator 2 within a temperature range suitable for sterilization, so as to effectively kill bacteria in the evaporator 2.
In the embodiment of the present invention, the fourth temperature threshold is preferably about 59 ℃, such as 58 ℃, 59 ℃, or 60 ℃. The fifth temperature threshold is preferably around 55 ℃, for example 54 ℃, 55 ℃ or 56 ℃.
The controller 1 is further configured to control the indoor fan 4 to stop when the indoor ambient temperature is greater than or equal to a preset sixth temperature threshold; and when the indoor environment temperature is less than the sixth temperature threshold, controlling the indoor fan 4 to operate at a low speed.
Specifically, when the refrigeration operation is performed, the rotation speed of the indoor fan 4 also affects the refrigeration effect of the evaporator 2, and in order to ensure that the temperature of the evaporator 2 can be maintained within a temperature range suitable for frost condensation during the refrigeration, the controller 1 is preset with a sixth temperature threshold value for maintaining the temperature in the evaporator 2 to be stable. When the evaporator 2 enters refrigeration operation, the second temperature sensor 6 detects the indoor environment temperature in real time and feeds the indoor environment temperature back to the controller 1, the controller 1 firstly controls the indoor fan 4 to operate for a short time (for example, 5min) at a low wind speed, after the indoor fan 4 operates for a short time at a low wind speed, the controller 1 compares the detected indoor environment temperature with a sixth temperature threshold value, when the indoor environment temperature is greater than or equal to the preset sixth temperature threshold value, the controller 1 controls the indoor fan 4 to stop, and when the indoor environment temperature is less than the sixth temperature threshold value, the indoor fan 4 is controlled to operate at a low speed.
In the embodiment of the present invention, the sixth temperature threshold is an indoor temperature that satisfies the frost condensation of the evaporator 2, and the sixth temperature threshold is preferably about 10 ℃, for example, 9 ℃, 10 ℃, or 11 ℃.
In summary, the cleaning system provided in the embodiment of the present invention can perform a heating operation after continuously operating for a period of time in a cooling or dehumidifying state of the air conditioner, or after entering a cooling and cleaning mode, send a heating control signal to the evaporator 2 through the controller 1 to control the evaporator 2 to perform a heating operation, so that the evaporator 2 can be cleaned by the condensed water in the evaporator 2 or the condensed water generated by the liquefaction of the condensed frost while sterilizing the evaporator 2, and the dust in the evaporator 2 is cleaned, thereby achieving a very good cleaning effect. Meanwhile, at the stage of entering the cooling and washing mode to provide frost for washing the evaporator 2, the heating mode is entered only when cooling is sufficient or when a sufficiently low temperature is reached, so that sufficient frost is provided for washing the evaporator 2. Secondly, the temperature of the evaporator 2 can be continuously kept in a temperature range suitable for sterilization in the heating and sterilizing process by detecting the temperature of the evaporator 2 and controlling the rotating speed of the indoor fan 4 and the rotating speed of the indoor fan 4, so that bacteria can be effectively killed. In addition, the highest wind speed allowed by the indoor fan 4 in the cleaning and sterilizing stage is the medium wind speed, hot wind blowing in summer is avoided, and user experience is improved.
Referring to fig. 3, a flow chart of a cleaning method according to a preferred embodiment of the present invention is shown, wherein the cleaning method is applied to a cleaning system of an air conditioner to clean an evaporator 2 of the air conditioner, and the flow chart shown in fig. 3 will be described in detail.
Step S101, judging whether the air conditioner continuously operates for a preset first time period in a refrigeration or dehumidification state, and if not, executing step S102; if so, step S103 is performed.
In the embodiment of the invention, the cleaning system comprises the evaporator 2, the controller 1, the first temperature sensor 3, the second temperature sensor 6, the indoor fan 4 and the outdoor fan 5, wherein the controller 1 is electrically connected with the evaporator 2, the first temperature sensor 3, the second temperature sensor 6, the indoor fan 4 and the outdoor fan 5 respectively.
The controller 1 can know the operation state of the air conditioner, and in the process of cleaning the evaporator 2 by the cleaning system, the controller 1 judges whether the air conditioner continuously operates for a predetermined first time period in a refrigeration or dehumidification state, and if not, executes the step S102; if so, step S103 is performed.
And step S102, entering a refrigeration cleaning mode to operate.
If the running time of the air conditioner in the refrigeration or dehumidification state does not reach the first time period, the situation that the evaporator 2 is not cleaned by enough frost or condensed water currently exists is indicated, at the moment, the controller 1 sends a refrigeration control signal to the evaporator 2, and the evaporator 2 carries out refrigeration running after receiving the refrigeration control signal.
In the embodiment of the invention, the following process is also included after the operation of the refrigeration cleaning mode is started.
After the evaporator 2 enters the refrigeration cleaning mode to operate, the controller 1 judges whether the evaporator 2 enters the refrigeration cleaning mode to operate for a predetermined third time period (namely, judges whether the evaporator 2 continuously performs the refrigeration operation for the predetermined third time period), if so, the condition that the frost condensation which can be used for cleaning the evaporator 2 is generated in the evaporator 2 is indicated, at the moment, the controller 1 sends a stop control signal to the evaporator 2, the evaporator 2 stops the refrigeration operation after receiving the stop control signal, and the refrigeration cleaning mode is ended.
Meanwhile, the controller 1 also judges whether the temperature of the evaporator 2 is lower than a preset first temperature threshold value, if so, the condition that frost which can be used for cleaning the evaporator 2 is generated in the evaporator 2 is indicated, and the controller 1 sends a stop control signal to the evaporator 2 at the moment, and the evaporator 2 stops the refrigerating operation after receiving the stop control signal, and ends the refrigerating and cleaning mode.
The second temperature sensor 6 is used for detecting the indoor environment temperature, when the refrigeration operation is performed, the rotating speed of the indoor fan 4 can also affect the refrigeration effect of the evaporator 2, and in order to ensure that the temperature of the evaporator 2 can be maintained within a temperature range suitable for frost condensation during the refrigeration, the controller 1 is preset with a sixth temperature threshold value used for maintaining the temperature stability in the evaporator 2. When the evaporator 2 enters a refrigerating operation, the second temperature sensor 6 detects the indoor temperature in real time and feeds the indoor temperature back to the controller 1, when the indoor environment temperature is greater than or equal to a preset sixth temperature threshold, the controller 1 controls the indoor fan 4 to stop, and when the indoor environment temperature is less than the sixth temperature threshold, the indoor fan 4 is controlled to operate at a low speed.
In step S103, a heating operation is performed.
If the air conditioner has been continuously operated for a predetermined first period of time in a cooling or dehumidifying state, indicating that there is sufficient frost or condensed water in the evaporator 2 for cleaning thereof, the controller 1 transmits a heating control signal to the evaporator 2, and the evaporator 2 performs a heating operation after receiving the heating control signal.
Specifically, the following process is also included after the heating operation is performed.
The controller 1 is preset with a second temperature threshold and a third temperature threshold for maintaining the temperature in the evaporator to be stable, the second temperature threshold is greater than the third temperature threshold, when the evaporator 2 is in heating operation, the first temperature sensor 3 detects the temperature in the evaporator 2 (the temperature of the coil of the evaporator 2) in real time and feeds the temperature back to the controller 1, and when the temperature of the evaporator 2 is greater than or equal to the second temperature threshold, the indoor fan 4 is controlled to operate at a medium rotation speed. When the temperature of the evaporator 2 is greater than or equal to the third temperature threshold and less than the second temperature threshold, the controller 1 controls the indoor fan 4 to maintain the current rotation speed. When the temperature of the evaporator 2 is less than the third temperature threshold, the indoor fan 4 is controlled to operate at a low speed. In this way, the temperature in the evaporator 2 can be maintained within a temperature range suitable for sterilization during heating, so that bacteria in the evaporator 2 can be effectively killed.
The controller 1 is also preset with a fourth temperature threshold and a fifth temperature threshold for maintaining the temperature in the evaporator to be stable, the fourth temperature threshold is greater than the fifth temperature threshold and the second temperature threshold, and the outdoor fan 5 is controlled to stop when the temperature of the evaporator 2 is greater than or equal to the preset fourth temperature threshold during the heating operation of the evaporator 2. When the temperature of the evaporator 2 is greater than or equal to a preset fifth temperature threshold and less than a fourth temperature threshold, the controller 1 controls the outdoor fan 5 to maintain the current rotation speed. When the temperature of the evaporator 2 is less than the fifth temperature threshold, the controller 1 controls the outdoor fan 5 to operate at a high speed. In this way, the control of the indoor fan 4 and the outdoor fan 5 during the heating process can further enable the temperature inside the evaporator 2 to be maintained within a temperature range suitable for sterilization, so as to effectively kill bacteria inside the evaporator 2.
And step S104, judging whether the heating operation is performed for a preset second time period or the air conditioner enters a load protection state, and if so, executing step S105.
In controlling the heating operation of the evaporator 2, the controller 1 further determines whether the evaporator 2 has been operated for the heating operation for the predetermined second period of time or the air conditioner has entered the load protection state, and if the evaporator 2 has been operated for the predetermined second period of time or entered the load protection state, performs step S105.
Step S105, the heating operation is stopped.
When the evaporator 2 has been in heating operation for a predetermined second time period or enters a load protection state, the controller 1 sends a stop control signal to the evaporator 2, and the evaporator 2 stops heating operation after receiving the stop control signal, thereby ending the whole cleaning process.
In summary, the cleaning method provided in the embodiment of the present invention can perform a heating operation after the air conditioner is continuously operated for a period of time in a cooling or dehumidifying state, or after the air conditioner enters a cooling and cleaning mode to operate, the controller 1 sends a heating control signal to the evaporator 2 to control the evaporator 2 to perform the heating operation, so that the evaporator 2 can be cleaned by the condensed water in the evaporator 2 or the condensed water generated by the liquefaction of the condensed frost while sterilizing the evaporator 2, and the dust in the evaporator 2 is cleaned, thereby achieving a very good cleaning effect. Meanwhile, at the stage of entering the cooling and washing mode to provide frost for washing the evaporator 2, the heating mode is entered only when cooling is sufficient or when a sufficiently low temperature is reached, so that sufficient frost is provided for washing the evaporator 2. Secondly, the temperature of the evaporator 2 can be continuously kept in a temperature range suitable for sterilization in the heating and sterilizing process by detecting the temperature of the evaporator 2 and controlling the rotating speed of the indoor fan 4 and the rotating speed of the indoor fan 4, so that bacteria can be effectively killed. In addition, the highest wind speed allowed by the indoor fan 4 in the cleaning and sterilizing stage is the medium wind speed, hot wind blowing in summer is avoided, and user experience is improved.
The embodiment of the invention also provides an air conditioner which comprises the cleaning system.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A cleaning method for cleaning an evaporator of an air conditioner, comprising:
when the air conditioner continuously operates for a preset first time period in a refrigeration or dehumidification state, heating operation is performed;
otherwise, firstly entering a refrigerating and cleaning mode for operation, and then carrying out heating operation;
the air conditioner comprises an indoor fan, and when the air conditioner performs heating operation, the cleaning method further comprises the following steps:
when the temperature of the evaporator is greater than or equal to a second preset temperature threshold value, controlling the indoor fan to operate at a medium rotating speed;
when the temperature of the evaporator is greater than or equal to a preset third temperature threshold and less than the second temperature threshold, controlling the indoor fan to maintain the current rotating speed;
and when the temperature of the evaporator is less than the third temperature threshold value, controlling the indoor fan to run at a low speed.
2. The cleaning method of claim 1, further comprising:
and stopping the heating operation after a predetermined second time period of the heating operation or when the air conditioner enters a load protection state.
3. The cleaning method according to claim 1, wherein the first entering the cooling washing mode and then the heating operation comprises:
when the air conditioner enters a refrigeration and cleaning mode to operate for a preset third time period, heating operation is carried out; or
And when the air conditioner enters a refrigerating and cleaning mode and the temperature of the evaporator is lower than a preset first temperature threshold value, heating operation is carried out.
4. The cleaning method according to claim 1, wherein the air conditioner further includes an outdoor fan, and when performing a heating operation, the method further includes:
when the temperature of the evaporator is greater than or equal to a preset fourth temperature threshold, controlling the outdoor fan to stop, wherein the fourth temperature threshold is greater than the second temperature threshold;
when the temperature of the evaporator is greater than or equal to a preset fifth temperature threshold and less than a fourth temperature threshold, controlling the outdoor fan to maintain the current rotating speed;
and when the temperature of the evaporator is smaller than the fifth temperature threshold value, controlling the outdoor fan to run at a high speed.
5. A cleaning system is applied to an air conditioner and is characterized by comprising a controller (1) and an evaporator (2), wherein the controller (1) is electrically connected with the evaporator (2);
the controller (1) is used for sending a heating control signal to the evaporator (2) after the air conditioner continuously operates for a preset first time period in a refrigeration or dehumidification state or the evaporator (2) enters a refrigeration cleaning mode to operate;
the evaporator (2) is used for heating operation after receiving the heating control signal;
the cleaning system further comprises an indoor fan (4), and when the cleaning system is in heating operation, the controller (1) is further used for controlling the indoor fan to operate at a medium rotating speed when the temperature of the evaporator is greater than or equal to a second preset temperature threshold value;
when the temperature of the evaporator is greater than or equal to a preset third temperature threshold and less than the second temperature threshold, controlling the indoor fan to maintain the current rotating speed; and
and when the temperature of the evaporator is less than the third temperature threshold value, controlling the indoor fan to run at a low speed.
6. The cleaning system according to claim 5, wherein the controller (1) is further configured to send a stop control signal to the evaporator (2) after a predetermined second period of time of heating operation of the evaporator (2) or when the air conditioner enters a load protection state;
the evaporator (2) is used for stopping heating operation according to the stop control information.
7. The cleaning system according to claim 5, further comprising a first temperature sensor (3), the first temperature sensor (3) being configured to detect a temperature of the evaporator (2);
the controller (1) is used for sending the heating control signal to the evaporator (2) after the evaporator (2) enters a refrigeration and washing mode to operate for a preset third time period; or
And when the evaporator (2) enters a cooling and washing mode and the temperature of the evaporator (2) is lower than a preset first temperature threshold value, sending the heating control signal to the evaporator (2).
8. An air conditioner characterized in that it comprises a cleaning system according to any one of claims 5 to 7.
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| CN109708243B (en) * | 2018-12-24 | 2021-01-08 | 海信（广东）空调有限公司 | Cleaning method of air conditioner and air conditioner |
| EP3748245B1 (en) * | 2019-06-05 | 2023-08-09 | Robert Bosch GmbH | Cleaning system for air conditioning system, heat exchanger assembly and methods |
| CN110513838A (en) * | 2019-08-23 | 2019-11-29 | 海信家电集团股份有限公司 | Air conditioner and air conditioner cleaning method |
| CN110513839A (en) * | 2019-08-23 | 2019-11-29 | 海信家电集团股份有限公司 | Air conditioner and air conditioner cleaning method |
| CN110513841B (en) * | 2019-08-23 | 2021-03-12 | 海信家电集团股份有限公司 | Air conditioner and air conditioner cleaning method |
| CN110513837A (en) * | 2019-08-23 | 2019-11-29 | 海信家电集团股份有限公司 | Air conditioner and air conditioner cleaning method |
| CN111380152B (en) * | 2020-03-27 | 2021-12-17 | 广东美的制冷设备有限公司 | High-temperature sterilization control method and device, air conditioner and storage medium |
| CN111425943B (en) * | 2020-04-03 | 2021-10-22 | 广东美的暖通设备有限公司 | Air conditioner, control method of air conditioner, and storage medium |
| CN111473477A (en) * | 2020-04-23 | 2020-07-31 | 宁波奥克斯电气股份有限公司 | Self-cleaning control method and device, multi-split air conditioning system and storage medium |
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