CN113531834B - Refrigeration hot-air-proof processing method and device for indoor unit of air conditioner - Google Patents
Refrigeration hot-air-proof processing method and device for indoor unit of air conditioner Download PDFInfo
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- CN113531834B CN113531834B CN202110822967.8A CN202110822967A CN113531834B CN 113531834 B CN113531834 B CN 113531834B CN 202110822967 A CN202110822967 A CN 202110822967A CN 113531834 B CN113531834 B CN 113531834B
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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
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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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 embodiment of the specification provides a refrigeration hot air prevention processing method and device for an indoor unit of an air conditioner, and the method comprises the following steps: determining a corresponding first control air speed according to the corresponding room temperature and the user set temperature of the indoor unit in the refrigeration mode; detecting the temperature of a heat exchanger of the indoor unit, determining the relation between the temperature of the heat exchanger and a preset temperature interval, and determining a second control air speed according to the relation and the first control air speed; and controlling the wind speed of the air conditioning fan according to the second control wind speed. The invention can reduce the direct flapping of damp and hot air to users, improve the user experience, and the fan control mode can ensure that the fan operates in the best state as much as possible, thereby reducing the energy consumption of an air conditioning system.
Description
Technical Field
One or more embodiments of the present disclosure relate to the field of air conditioning technologies, and in particular, to a method and an apparatus for processing cooling and hot air prevention of an indoor unit of an air conditioner.
Background
The air conditioner generally has four operation modes, namely a cooling mode, a heating mode, an air supply mode and a dehumidification mode. In the cooling mode, the indoor unit of the air conditioner generally operates according to a wind speed instruction input by a user during normal cooling operation. When the humidity and the temperature of indoor air are high and the air conditioner is not operated to the optimal state, indoor hot and humid air directly blows out a user, so that the user experience is poor. Meanwhile, because the air conditioning performance is not in the optimal state, the energy consumption of the system is also high.
Disclosure of Invention
One or more embodiments of the present specification describe a method and an apparatus for processing cooling and hot air prevention of an indoor unit of an air conditioner.
According to a first aspect, a method for processing refrigerating and hot wind prevention of an indoor unit of an air conditioner is provided, which includes:
determining a corresponding first control air speed according to the corresponding room temperature and the user set temperature of the indoor unit in the refrigeration mode;
detecting the temperature of a heat exchanger of the indoor unit, determining the relation between the temperature of the heat exchanger and a preset temperature interval, and determining a second control air speed according to the relation and the first control air speed;
and controlling the wind speed of the air conditioner fan according to the second control wind speed.
According to a second aspect, a refrigeration and hot air prevention processing device of an indoor unit of an air conditioner is provided, which comprises:
the first determining module is used for determining a corresponding first control air speed according to the corresponding room temperature and the user set temperature of the indoor unit in the refrigeration mode;
the second determining module is used for detecting the temperature of a heat exchanger of the indoor unit, determining the relation between the temperature of the heat exchanger and a preset temperature interval, and determining a second control air speed according to the relation and the first control air speed;
and the wind speed control module is used for controlling the wind speed of the air conditioning fan according to the second control wind speed.
In the refrigeration hot-air-proof processing method and device for the indoor unit of the air conditioner, in the refrigeration mode, a corresponding first control air speed is determined according to the room temperature and the temperature set by a user, a second control air speed is determined according to the temperature of the heat exchanger and the first control air speed, and then the fan is controlled according to the second control air speed. In the process, the factors such as the room temperature, the temperature set by a user, the temperature of a heat exchanger and the like are considered, namely, the second control air speed is obtained through comprehensive consideration from multiple angles to control the air speed of the fan, so that the control of the fan is more reasonable and accords with the practical application scene, the fan is not directly controlled according to the air speed set by the user, the damp and hot air is reduced and directly splashed to the user, the user experience is improved, and the fan can be operated in the optimal state as soon as possible by the fan control mode, and the energy consumption of an air conditioning system is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present specification or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the description below are some embodiments of the present specification, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic flow chart of a refrigeration and hot air prevention processing method of an air conditioning indoor unit in one embodiment of the present specification.
Detailed Description
The scheme provided by the specification is described below with reference to the accompanying drawings.
In the refrigeration mode, the hot air prevention treatment is added to the indoor unit in the refrigeration running process, so that the air conditioner outputs cool and comfortable air, the dryness heat is reduced, and the use perception of products is improved.
In a first aspect, the present invention provides a method for processing cooling and hot air prevention of an indoor unit of an air conditioner, as shown in fig. 1, the method includes the following steps S100 to S300:
s100, determining a corresponding first control air speed according to the corresponding room temperature and the user set temperature of the indoor unit in the refrigeration mode;
it can be understood that the temperature set by the user is the temperature set by the user through a remote control or a mobile phone control terminal. The room temperature is the indoor temperature of the space where the indoor unit of the air conditioner is located.
In a specific implementation, S100 may include at least one of:
s110, if the room temperature is greater than the user set temperature and the difference between the room temperature and the user set temperature is greater than a first preset value, the first control wind speed is the user set wind speed;
that is, the room temperature is higher than the user-set temperature by a relatively large amount, which indicates that the room temperature is still relatively high, and the ambient temperature is still relatively high at this time, and the user-set wind speed is set as the first control wind speed at this time.
It can be understood that the wind speed set by the user is the wind speed set by the user through a remote control or a mobile phone control terminal and the like.
The first preset value can be set as required, for example, set to 2 degrees celsius.
S120, if the room temperature is greater than the user set temperature, and the difference between the room temperature and the user set temperature is less than or equal to the first preset value and greater than a second preset value, the first control wind speed is not higher than the wind speed corresponding to the medium-speed wind gear and not higher than the user set wind speed;
the second preset value may be set according to a user requirement, for example, set to 1 degree celsius.
That is, the room temperature is higher than the user-set temperature, but the difference between the room temperature and the user-set temperature is not particularly high, and the first control wind speed is set to be equal to or lower than the user-set wind speed and equal to or lower than the wind speed corresponding to the medium-speed gear.
S130, if the room temperature is greater than the user set temperature and the difference between the room temperature and the user set temperature is less than or equal to the second preset value, the first control wind speed is not higher than the wind speed corresponding to the low-speed wind gear and not higher than the user set wind speed;
that is, the room temperature is higher than the user set temperature, but the difference between the room temperature and the user set temperature is relatively small, and at this time, the first control wind speed may be set to be equal to or less than the user set wind speed and equal to or less than the wind speed corresponding to the low-speed wind gear.
And S140, if the room temperature is less than or equal to the temperature set by the user, the first control wind speed is the wind speed corresponding to the breeze level.
That is, when the room temperature is equal to or lower than the user set temperature, the first control wind speed is set to the wind speed corresponding to the micro-wind level.
The wind speed gears of the fan comprise a strong wind gear, a high-speed wind gear, a medium-speed wind gear, a low-speed wind gear and a micro wind gear. The gentle wind gear is the lowest gear.
As can be seen from S110 to S140, when the room temperature is higher than the user set temperature, the difference between the two is smaller, and the first control air speed is smaller, because when the difference between the two is smaller, it is not necessary to cool the indoor air too fast, so that the indoor temperature gradually approaches the user set temperature, and the user gradually adapts to the user set temperature. When the room temperature is lower than the set temperature of a user, the situation rarely occurs in the refrigeration process, and the wind speed of the lowest gear is selected as the first control wind speed to meet the requirement.
After the first control wind speed is determined, the first control wind speed is not directly adopted to control the wind speed of the fan, but the first control wind speed is further adjusted according to the temperature of the heat exchanger to obtain a second control wind speed, so that the final control wind speed not only considers the room temperature and the temperature set by a user, but also considers the temperature of the heat exchanger, and the second control wind speed is obtained to control the wind speed of the fan from multiple angles, so that the control of the fan is more reasonable.
S200, detecting the temperature of a heat exchanger of the indoor unit, determining the relation between the temperature of the heat exchanger and a preset temperature interval, and determining a second control air speed according to the relation and the first control air speed;
the preset temperature interval can be set as required.
In particular implementations, S200 may include at least one of:
s210, if the temperature of the heat exchanger is smaller than the minimum value of the preset temperature interval, taking the first control wind speed as a second control wind speed;
it can be understood that if the temperature of the heat exchanger is smaller than the minimum value of the preset temperature interval, it is indicated that the temperature of the heat exchanger is very low, and the situation that the dry hot gas directly blows to the user rarely occurs at this time, so that the first control wind speed can be directly used as the second control wind speed, that is, the wind speed of the fan is controlled by the first control wind speed.
It will be understood that the liquid and gas tubes are located at both ends of the coil and that the heat exchanger temperature in the present invention refers to the temperature in the middle of the coil of the heat exchanger.
S220, if the temperature of the heat exchanger is within the preset temperature range, the second control wind speed is less than or equal to the first control wind speed, and the second control wind speed cannot exceed the wind speed corresponding to the medium-speed gear;
it can be understood that when the temperature of the heat exchanger is within the preset temperature range, that is, the temperature of the heat exchanger is not particularly high or low, the second control air speed can be set to a moderate value which cannot exceed the air speed corresponding to the medium-speed air gear and cannot exceed the first control air speed, and at this time, the air-conditioning fan does not bring strong dry heat to users when in operation.
In a specific implementation, the first control wind speed may be a wind speed corresponding to a strong wind level, a high-speed wind level, a medium-speed wind level, a low-speed wind level, or a light wind level, and when the first control wind speed is a wind speed corresponding to a strong wind level or a high-speed wind level, because the second control wind speed cannot exceed the first control wind speed and cannot exceed a wind speed corresponding to a medium-speed wind level, the wind speed that the second control wind speed can select may be a wind speed corresponding to a medium-speed wind level, a low-speed wind level, or a light wind level, and in order to reach an optimal operation state as soon as possible, the wind speed corresponding to a medium-speed wind level may be selected as the second control wind speed. That is, if the first control wind speed is a wind speed corresponding to a strong wind stop or a high-speed wind stop, the second control wind speed is a wind speed corresponding to a medium-speed wind stop.
In specific implementation, if the first control wind speed is less than or equal to the wind speed corresponding to the medium-speed gear, the first control wind speed is used as a second control wind speed. For example, the first control wind speed is a wind speed corresponding to a medium speed gear, the second control wind speed may be selected as a wind speed corresponding to a medium speed gear, a low speed gear or a gentle wind gear, and the second control wind speed may be selected as a wind speed corresponding to a medium speed gear in order to achieve an optimal operation state as soon as possible. For another example, the first control wind speed may be a wind speed corresponding to a low-speed gear, and the second control wind speed may be selected to have a wind speed corresponding to a low-speed gear or a light gear. For another example, the first control wind speed is a wind speed corresponding to a micro-speed gear, and the second control wind speed can only be selected from the wind speeds corresponding to the micro-speed gears. It can be seen that, if the first control wind speed is less than or equal to the wind speed corresponding to the medium-speed gear, the first control wind speed may be used as a second control wind speed.
And S230, if the temperature of the heat exchanger is greater than the maximum value of the preset temperature interval, the second control wind speed is less than or equal to the first control wind speed, and the second control wind speed cannot exceed the wind speed corresponding to the low-speed wind gear.
It can be understood that, if the temperature of the heat exchanger is greater than the maximum value of the preset temperature interval, it is indicated that the temperature of the heat exchanger is very high at this time, and the situation that the dry hot gas directly flaps the user is likely to occur, so that the second control air speed is set to be very low, that is, the air speed of the fan is very low, the air speed corresponding to the low-speed air gear cannot be exceeded, and the first control air speed cannot be exceeded, and by reducing the second control air speed, the rapid direct flap of the dry hot gas to the user can be reduced, and the experience of the user is improved.
In specific implementation, if the first control wind speed is a wind speed corresponding to a strong wind gear, a high-speed wind gear or a medium-speed wind gear, and the second control wind speed cannot exceed a wind speed corresponding to a low-speed wind gear and cannot exceed the first control wind speed, the wind speed that can be selected by the second control wind speed is a wind speed corresponding to a low-speed wind gear or a light wind gear, and in order to enable the fan to reach an optimal operation state as soon as possible, the wind speed corresponding to the low-speed wind gear can be selected by the second control wind speed.
In specific implementation, if the first control wind speed is a wind speed corresponding to a low wind gear, the second control wind speed may select a wind speed corresponding to a low-speed wind gear or a light wind gear, and in order to enable the fan to reach an optimal operation state as soon as possible, the second control wind speed may select a wind speed corresponding to a low-speed wind gear.
In a specific implementation, if the first controlled wind speed is a wind speed corresponding to a gentle wind level, the second controlled wind speed is a wind speed corresponding to a gentle wind level.
That is, if the first controlled wind speed is equal to or less than the wind speed corresponding to the low-speed gear, the first controlled wind speed is set as the second controlled wind speed.
From the foregoing S210 to S230, when the temperature of the heat exchanger is low, the second control air speed of the fan of the indoor unit is high, and when the temperature of the heat exchanger is high, the second control air speed of the fan is low, so that the influence of the hot and humid air on the user can be reduced better, and the user experience is improved.
And S300, controlling the wind speed of the air conditioner fan according to the second control wind speed.
That is, the wind speed of the control fan gradually becomes the second control wind speed.
It is understood that the above S100 to S300 are performed in the normal control stage of the wind speed, but if the air conditioner is in the abnormal control stage, the wind speed control cannot be performed by the above method. For example, in the anti-condensation protection stage, anti-condensation treatment is required to prevent excessive humid air or moisture from accumulating in the air conditioner and affecting the air conditioner.
In a specific implementation, before the above S100, the present invention may include the following step S050:
s050, after the compressor of the air conditioner continuously runs for a first preset time, judging whether the room temperature and the temperature of the heat exchanger meet a first preset condition or not; the first preset condition comprises that the room temperature is greater than a first preset temperature and the temperature of the heat exchanger is less than or equal to a second preset temperature, or the room temperature is less than or equal to the first preset temperature and is greater than a third preset temperature and the temperature of the heat exchanger is less than or equal to a fourth preset temperature; wherein the first preset temperature, the third preset temperature, the second preset temperature and the fourth preset temperature are sequentially reduced;
if so, controlling the fan to be at the wind speed corresponding to the low-speed wind gear, and entering into an anti-condensation protection stage;
otherwise, the air conditioner enters a normal wind speed control stage and the step S100 is allowed to be executed.
It can be understood that whether the air conditioner needs to perform the condensation prevention protection stage is judged through a first preset condition, and the first preset condition comprises two conditions, one of which is as follows: the room temperature is greater than a first preset temperature and the temperature of the heat exchanger is less than or equal to a second preset temperature, and the other is as follows: the room temperature is less than or equal to the first preset temperature and is greater than the third preset temperature, and the temperature of the heat exchanger is less than or equal to the fourth preset temperature.
Wherein the first preset temperature, the third preset temperature, the second preset temperature and the fourth preset temperature are sequentially reduced. The specific temperature values can be set as desired, for example, the first preset temperature is set to 30 °, the third preset temperature is set to 25 °, the second preset temperature is set to 17 °, and the fourth preset temperature is set to 15 °. That is, the two first preset conditions are: the room temperature is more than 30 ℃, the indoor coil pipe is less than or equal to 17 ℃, the room temperature is more than 25 ℃ and less than or equal to 30 ℃, and the indoor coil pipe is less than or equal to 15 ℃. When these two conditions are met, the air conditioner needs to perform an anti-condensation protection phase. Otherwise, the air conditioner can enter a normal wind speed control stage.
The first preset time period may be set as required, for example, 25 minutes.
The above steps are processing performed under the condition that the fan is turned on after the air conditioner is turned on.
In specific implementation, after the air conditioner is cooled from shutdown to startup, the fan of the indoor unit is just stopped, and after the air conditioner is started, the fan is not directly controlled to be turned on and operated, but some processing is required to determine whether the fan needs to be turned on. Specifically, the present invention may further include S010:
s010, after the air conditioner is started in the refrigeration mode, detecting the temperature of a heat exchanger of the indoor unit, and determining whether a compressor of the outdoor unit is running; if the air conditioner is running, starting timing the running time of the compressor, starting an air conditioner fan when the timing time reaches a second preset time or the temperature of the heat exchanger is less than a fourth preset temperature, and allowing the air conditioner fan to execute the step of judging whether the room temperature and the temperature of the heat exchanger meet a first preset condition after the compressor of the air conditioner continuously runs for a first preset time;
and the second preset time length is less than the first preset time length.
That is, after the air conditioner is turned on, it is determined whether the compressor is operating, and if so, the timer is started from this moment. And when the timing duration reaches a second preset duration, starting the fan, and executing the steps S050, S100-S300. Or when the temperature of the heat exchanger is lower than the fourth preset temperature, starting the fan, and executing the steps S050, S100-S300. Of course, after the fan is started, the air conditioner may operate according to the user-set temperature and the user-set wind speed, and then the S050, S100 to S300 may be performed after the compressor of the air conditioner continuously operates for the first preset time period. Therefore, the condition that the timing time reaches the second preset time or the temperature of the heat exchanger is lower than the fourth preset temperature is the starting condition of the fan.
When the timing duration is shorter than the second preset duration, the air conditioner is just started without heat absorption and cold dissipation, so that the fan is not started, and the energy-saving effect is achieved. In addition, when the temperature of the heat exchanger is higher than the fourth preset temperature, the fan is started to generate strong dry hot air, so that the user experience is seriously influenced, and therefore the fan is started only when the temperature of the heat exchanger is reduced to be lower than the fourth preset temperature.
It is understood that this process of S010 is performed at an initial stage of the air conditioner being turned on.
In specific implementation, in a normal operation process, the above S100 to S30 may be executed according to a preset period, for example, the above S100 to S300 is executed every 5 minutes, that is, a second control wind speed is calculated once, and the wind speed of the fan is adjusted once, so that it is always ensured that the hot and humid air is not directly blown to the user, and the user experience is improved. And the fan of the user can be always operated in the optimal state, and the energy consumption of the air conditioning system is reduced. The method specifically comprises the following steps: and starting timing after the first control wind speed is obtained through calculation, calculating a second control wind speed according to the first control wind speed and the temperature of the heat exchanger when the timing reaches a preset period, and controlling the wind speed according to the second control wind speed.
In a specific implementation, in order to prevent freezing in the cooling mode, the following steps may be performed:
the method comprises the steps of obtaining the temperature of a liquid pipe of a heat exchanger, judging whether the heat exchanger meets a second preset condition, controlling an electronic expansion valve of the indoor unit to be closed if the second preset condition comprises that the duration time of the liquid pipe temperature lower than a fifth preset temperature reaches a preset time, and controlling the electronic expansion valve of the indoor unit to be opened if the liquid pipe temperature is higher than a sixth preset temperature; the electronic expansion valve is arranged on a refrigerant pipeline of the indoor unit; the fifth preset temperature is less than the sixth preset temperature.
That is, when the temperature of the liquid pipe is relatively low and the duration is relatively long, it indicates that the indoor unit has a freezing risk, the electronic expansion valve is closed, and the electronic expansion valve is arranged on the refrigerant pipe, so that the passage of the refrigerant entering the indoor unit is cut off after the electronic expansion valve is closed. Therefore, the temperature of the liquid pipe of the indoor unit can gradually rise until the temperature of the liquid pipe is higher than the sixth preset temperature, which indicates that the indoor unit is recovered to be normal and does not have the freezing risk, and the electronic expansion valve can be opened to continue refrigerating.
In specific implementation, before obtaining the temperature of the liquid pipe of the heat exchanger and determining whether the heat exchanger meets the second preset condition, the method may further include:
judging whether the liquid pipe temperature is greater than or equal to a preset lower limit value, if so, executing the step of acquiring the liquid pipe temperature of the heat exchanger, and judging whether the heat exchanger meets a second preset condition;
if the temperature of the liquid pipe is lower than a preset lower limit value, controlling a compressor of the outdoor unit to enter a frequency raising stopping mode, and opening an air bypass valve arranged between an exhaust port and an air return port of the compressor; and after entering the frequency raising stopping mode and opening the gas bypass valve, acquiring the temperature of a liquid pipe of the heat exchanger in real time, and controlling the compressor to exit the frequency raising stopping mode and close the gas bypass valve when the temperature of the liquid pipe is greater than a preset upper limit value.
It can be understood that the temperature of the liquid pipe is greater than or equal to the preset lower limit value, no winter risk exists in the indoor unit at the moment, the indoor unit needs to be further judged, and even if the indoor unit has a freezing risk, the indoor unit is not serious and only needs to be adjusted through an electronic expansion valve. And when the temperature of the liquid pipe is lower than the preset lower limit value, the freezing risk is higher, and the adjustment needs to be carried out by controlling the compressor. At the moment, the frequency of the compressor stops increasing, and the air bypass valve is opened, so that the refrigerating capacity is not increased any more, the high pressure of the air conditioner is reduced, the low pressure is increased, and the freezing risk is reduced. And when the temperature of the liquid pipe is higher than a preset upper limit value, the freezing risk of the air conditioner is relatively low, and at the moment, the compressor can be controlled to exit the frequency raising stopping mode, and the air bypass valve is closed. In order to further prevent freezing, after the compressor exits the stop frequency increasing mode and the air bypass valve is closed, it may be determined whether the heat exchanger meets the second preset condition, and then it is determined whether to close the electronic expansion valve, that is, the risk of freezing is reduced by the electronic expansion valve.
According to the refrigeration hot air prevention processing method of the indoor unit of the air conditioner, the corresponding first control air speed is determined according to the room temperature and the temperature set by a user in the refrigeration mode, the second control air speed is determined according to the temperature of the heat exchanger and the first control air speed, and the fan is controlled according to the second control air speed. In the process, the factors such as the room temperature, the temperature set by a user, the temperature of a heat exchanger and the like are considered, namely, the second control air speed is obtained through comprehensive consideration from multiple angles to control the air speed of the fan, so that the control of the fan is more reasonable and accords with the practical application scene, the fan is not directly controlled according to the air speed set by the user, the damp and hot air is reduced and directly splashed to the user, the user experience is improved, the fan can be operated in the best state as far as possible by the fan control mode, and the energy consumption of an air conditioning system is reduced.
In a second aspect, the present invention provides a device for processing hot air for cooling and preventing in an indoor unit of an air conditioner, comprising:
the first determining module is used for determining a corresponding first control air speed according to the corresponding room temperature and the user set temperature of the indoor unit in the refrigeration mode;
the second determining module is used for detecting the temperature of a heat exchanger of the indoor unit, determining the relation between the temperature of the heat exchanger and a preset temperature interval, and determining a second control air speed according to the relation and the first control air speed;
and the wind speed control module is used for controlling the wind speed of the air conditioning fan according to the second control wind speed.
It is understood that, for the device provided in the embodiment of the present invention, for the explanation, examples, and beneficial effects of the related contents, reference may be made to the corresponding parts in the foregoing method, and details are not described here.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
Those skilled in the art will recognize that the functionality described in this disclosure may be implemented in hardware, software, firmware, or any combination thereof, in one or more of the examples described above. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.
Claims (8)
1. A refrigeration hot air prevention processing method of an indoor unit of an air conditioner is characterized by comprising the following steps:
determining a corresponding first control air speed according to the corresponding room temperature and the user set temperature of the indoor unit in the refrigeration mode;
detecting the temperature of a heat exchanger of the indoor unit, determining the relation between the temperature of the heat exchanger and a preset temperature interval, and determining a second control air speed according to the relation and the first control air speed;
controlling the wind speed of the air conditioning fan according to the second control wind speed;
the determining a corresponding first control air speed according to the corresponding room temperature and the user set temperature of the indoor unit in the refrigeration mode comprises the following steps:
if the room temperature is greater than the user set temperature and the difference between the room temperature and the user set temperature is greater than a first preset value, the first control wind speed is the user set wind speed;
if the room temperature is higher than the user set temperature and the difference between the room temperature and the user set temperature is smaller than or equal to the first preset value and larger than a second preset value, the first control wind speed is not higher than the wind speed corresponding to the medium-speed wind gear and not higher than the user set wind speed;
if the room temperature is greater than the user set temperature and the difference between the room temperature and the user set temperature is less than or equal to the second preset value, the first control wind speed is not higher than the wind speed corresponding to the low-speed wind gear and not higher than the user set wind speed;
if the room temperature is less than or equal to the temperature set by the user, the first control wind speed is the wind speed corresponding to the breeze level;
the wind speed gears of the fan comprise a strong wind gear, a high-speed wind gear, a medium-speed wind gear, a low-speed wind gear and a micro wind gear; the determining the relationship between the temperature of the heat exchanger and a preset temperature interval and determining a second control wind speed according to the relationship and the first control wind speed comprises the following steps:
if the temperature of the heat exchanger is smaller than the minimum value of the preset temperature interval, taking the first control wind speed as a second control wind speed;
if the temperature of the heat exchanger is within the preset temperature range, the second control wind speed is less than or equal to the first control wind speed, and the second control wind speed cannot exceed the wind speed corresponding to the medium-speed gear;
and if the temperature of the heat exchanger is greater than the maximum value of the preset temperature interval, the second control wind speed is less than or equal to the first control wind speed, and the second control wind speed cannot exceed the wind speed corresponding to the low-speed wind gear.
2. The method of claim 1, wherein before determining the corresponding first control air speed according to the corresponding room temperature and the user-set temperature of the indoor unit in the cooling mode, the method further comprises:
after the compressor of the air conditioner continuously operates for a first preset time, judging whether the room temperature and the temperature of the heat exchanger meet first preset conditions or not; the first preset condition comprises that the room temperature is greater than a first preset temperature and the temperature of the heat exchanger is less than or equal to a second preset temperature, or the room temperature is less than or equal to the first preset temperature and is greater than a third preset temperature and the temperature of the heat exchanger is less than or equal to a fourth preset temperature; wherein the first preset temperature, the third preset temperature, the second preset temperature and the fourth preset temperature are sequentially reduced;
if so, controlling the fan to be at a wind speed corresponding to a low-speed wind gear, and entering an anti-condensation protection stage;
otherwise, the air conditioner enters a normal air speed control stage, and the step of determining the corresponding first control air speed according to the corresponding room temperature and the user set temperature of the indoor unit in the refrigeration mode is allowed to be executed.
3. The method of claim 2, further comprising:
after the air conditioner is started in a refrigeration mode, detecting the temperature of a heat exchanger of an indoor unit, and determining whether a compressor of an outdoor unit is running; if the air conditioner is running, starting timing the running time of the compressor, starting an air conditioner fan when the timing time reaches a second preset time or the temperature of the heat exchanger is less than a fourth preset temperature, and allowing the air conditioner fan to execute the step of judging whether the room temperature and the temperature of the heat exchanger meet a first preset condition after the compressor of the air conditioner continuously runs for a first preset time; the second preset duration is less than the first preset duration.
4. The method of claim 1,
if the temperature of the heat exchanger is within the preset temperature range, the second control wind speed is less than or equal to the first control wind speed, and the second control wind speed cannot exceed the wind speed corresponding to the medium-speed gear, including:
if the first control wind speed is a wind speed corresponding to a strong wind shield or a high-speed wind shield, the second control wind speed is a wind speed corresponding to a medium-speed wind shield;
and if the first control wind speed is less than or equal to the wind speed corresponding to the medium-speed gear, taking the first control wind speed as a second control wind speed.
5. The method of claim 1, wherein if the temperature of the heat exchanger is greater than the maximum value of the preset temperature interval, the second control wind speed is less than or equal to the first control wind speed, and the second control wind speed cannot exceed a wind speed corresponding to a low-speed wind gear, and the method comprises:
if the first control wind speed is the wind speed corresponding to a strong wind gear, a high-speed wind gear or a medium-speed wind gear, the second control wind speed is the wind speed corresponding to a low-speed wind gear;
and if the first control wind speed is less than or equal to the wind speed corresponding to the low-speed gear, taking the first control wind speed as a second control wind speed.
6. The method of claim 1, further comprising:
the method comprises the steps of obtaining the temperature of a liquid pipe of a heat exchanger, judging whether the heat exchanger meets a second preset condition, controlling an electronic expansion valve of the indoor unit to be closed if the second preset condition comprises that the duration time of the liquid pipe temperature lower than a fifth preset temperature reaches a preset time, and controlling the electronic expansion valve of the indoor unit to be opened if the liquid pipe temperature is higher than a sixth preset temperature; the electronic expansion valve is arranged on a refrigerant pipeline of the indoor unit; the fifth preset temperature is less than the sixth preset temperature.
7. The method according to claim 1, wherein before obtaining the liquid pipe temperature of the heat exchanger and determining whether the heat exchanger meets the second preset condition, the method further comprises:
judging whether the liquid pipe temperature is greater than or equal to a preset lower limit value, if so, executing the step of acquiring the liquid pipe temperature of the heat exchanger, and judging whether the heat exchanger meets a second preset condition;
if the temperature of the liquid pipe is lower than a preset lower limit value, controlling a compressor of the outdoor unit to enter a frequency raising stopping mode, and opening an air bypass valve arranged between an exhaust port and a return port of the compressor; and after entering the frequency raising stopping mode and opening the gas bypass valve, acquiring the temperature of a liquid pipe of the heat exchanger in real time, and controlling the compressor to exit the frequency raising stopping mode and close the gas bypass valve when the temperature of the liquid pipe is greater than a preset upper limit value.
8. The utility model provides a hot-blast processing apparatus is prevented in refrigeration of machine in air conditioning which characterized in that includes:
the first determining module is used for determining a corresponding first control air speed according to the corresponding room temperature and the user set temperature of the indoor unit in the refrigeration mode;
the second determining module is used for detecting the temperature of a heat exchanger of the indoor unit, determining the relation between the temperature of the heat exchanger and a preset temperature interval, and determining a second control air speed according to the relation and the first control air speed;
the wind speed control module is used for controlling the wind speed of the air conditioning fan according to the second control wind speed;
wherein, according to the room temperature and the user's temperature that correspond of indoor set under refrigeration mode, confirm corresponding first control wind speed, include:
if the room temperature is greater than the user set temperature and the difference between the room temperature and the user set temperature is greater than a first preset value, the first control wind speed is the user set wind speed;
if the room temperature is greater than the user set temperature, and the difference between the room temperature and the user set temperature is less than or equal to the first preset value and greater than a second preset value, the first control wind speed is not higher than the wind speed corresponding to the medium-speed wind gear and not higher than the user set wind speed;
if the room temperature is greater than the user set temperature and the difference between the room temperature and the user set temperature is less than or equal to the second preset value, the first control wind speed is not higher than the wind speed corresponding to the low-speed wind gear and not higher than the user set wind speed;
if the room temperature is less than or equal to the temperature set by the user, the first control wind speed is the wind speed corresponding to the breeze level;
the wind speed gears of the fan comprise a strong wind gear, a high-speed wind gear, a medium-speed wind gear, a low-speed wind gear and a micro wind gear; the determining the relationship between the temperature of the heat exchanger and a preset temperature interval and determining a second control wind speed according to the relationship and the first control wind speed comprises the following steps:
if the temperature of the heat exchanger is smaller than the minimum value of the preset temperature interval, taking the first control wind speed as a second control wind speed;
if the temperature of the heat exchanger is within the preset temperature range, the second control wind speed is less than or equal to the first control wind speed, and the second control wind speed cannot exceed the wind speed corresponding to the medium-speed gear;
and if the temperature of the heat exchanger is greater than the maximum value of the preset temperature interval, the second control wind speed is less than or equal to the first control wind speed, and the second control wind speed cannot exceed the wind speed corresponding to the low-speed wind gear.
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| CN202110822967.8A CN113531834B (en) | 2021-07-21 | 2021-07-21 | Refrigeration hot-air-proof processing method and device for indoor unit of air conditioner |
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