WO2019148973A1 - Procédé d'exécution de manœuvre de nettoyage automatique permettant d'éviter la génération d'eau de condensat et climatiseur associé - Google Patents

Procédé d'exécution de manœuvre de nettoyage automatique permettant d'éviter la génération d'eau de condensat et climatiseur associé Download PDF

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Publication number
WO2019148973A1
WO2019148973A1 PCT/CN2018/120476 CN2018120476W WO2019148973A1 WO 2019148973 A1 WO2019148973 A1 WO 2019148973A1 CN 2018120476 W CN2018120476 W CN 2018120476W WO 2019148973 A1 WO2019148973 A1 WO 2019148973A1
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Prior art keywords
temperature
air conditioner
condensation
indoor
preset condition
Prior art date
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PCT/CN2018/120476
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English (en)
Chinese (zh)
Inventor
许文明
王飞
付裕
张心怡
李阳
李皖皖
丁爽
罗荣邦
袁俊军
Original Assignee
青岛海尔空调器有限总公司
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Publication of WO2019148973A1 publication Critical patent/WO2019148973A1/fr

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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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/43—Defrosting; Preventing freezing of indoor units
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F2013/221—Means for preventing condensation or evacuating condensate to avoid the formation of condensate, e.g. dew
    • 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
    • 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
    • F24F2110/20—Humidity
    • 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

Definitions

  • the invention relates to the technical field of air conditioning control, in particular to a method for preventing condensation by self-cleaning and an air conditioner.
  • the control can be optimized to solve the problem.
  • the anti-condensation effect is achieved by adding an electric heating device and turning on the electric heating device under certain conditions, or reducing the cooling temperature by reducing the operating frequency of the compressor.
  • the effect of condensation are all try to avoid condensation by raising the temperature above the dew point temperature. Although the above method can prevent the occurrence of condensation, it is necessary to raise the temperature, which affects the effect of air conditioning refrigeration.
  • Embodiments of the present invention are directed to providing a new method of anti-condensation, and in order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This generalization is not a general comment, nor is it intended to identify key/critical constituent elements or to describe the scope of protection of these embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the following detailed description.
  • a method for preventing condensation by self-cleaning comprising: obtaining a plurality of temperature data and determining whether an anti-condensation operation is required according to a first preset condition; if necessary In the anti-condensation operation, the air conditioner is controlled to perform a self-cleaning operation to prevent condensation.
  • the controlling the air conditioner performs a self-cleaning operation, including: raising or maintaining a running frequency of the compressor, reducing a rotation speed of the indoor fan or turning off the indoor fan, causing frost on the surface of the heat exchanger indoors; and, in the air conditioning room After the surface of the heat exchanger is frosted, the air conditioner is switched to the heating mode to defovi the surface of the heat exchanger inside the air conditioner.
  • the method further comprises: obtaining indoor humidity, and determining whether the anti-condensation operation is required according to the second preset condition; if necessary, improving the operation of the air conditioner compressor Frequency, or extend the time of frosting, or increase the operating frequency of the air conditioner compressor and extend the frosting time.
  • the method further includes: obtaining indoor humidity, and determining, according to the second preset condition, whether an anti-condensation operation is required; if necessary, reducing an operating frequency of the air conditioner compressor, or reducing The opening of the throttle member reduces the operating frequency of the air conditioner compressor and reduces the opening of the throttle member.
  • the second preset condition includes: if the indoor humidity RH is greater than the set threshold RHt, or the indoor humidity RH continues to be greater than the set threshold RHt for a set time period, an anti-condensation operation is required.
  • the set threshold RHt ranges from 60% to 90%.
  • the set threshold RHt is 60%, 65%, 70%, 75%, 80%, 85% or 90%.
  • the operating frequency of the air conditioner compressor is reduced proportionally.
  • the ratio is a fixed ratio or a variable ratio.
  • the fixed ratio ranges from 60% to 90%.
  • the fixed ratio is 60%, 65%, 70%, 75%, 80%, 85% or 90%.
  • variable ratio value is proportional to the difference ⁇ RH between the indoor humidity and the set threshold.
  • the value of b ranges from 0.1 to 0.4.
  • b 0.1, 0.2, 0.3 or 0.4.
  • the plurality of temperature data includes an indoor coil temperature T1 and an outdoor coil temperature T2.
  • the first preset condition includes: if the indoor coil temperature T1 ⁇ t1 and the outdoor coil temperature T2 ⁇ t2, an anti-condensation operation is required; wherein t1 is the first set value, and t2 is the first Two set values.
  • the plurality of data further includes a compressor vent temperature T3.
  • the first preset condition includes: if the indoor coil temperature T1 ⁇ t1 and the outdoor coil temperature T2 ⁇ t2 and the compressor exhaust temperature T3 ⁇ t3, an anti-condensation operation is required; wherein t1 For the first set value, t2 is the second set value, and t3 is the third set value.
  • an air conditioner including a compressor, a plurality of temperature sensors, and a microcontroller, the microcontroller including: a communication unit for receiving information data; the information data including each The temperature data detected by the temperature sensor; the first determining unit is configured to determine whether the anti-condensation operation is required according to the first preset condition; and the control unit is configured to control the air conditioner to perform the self-cleaning operation when the anti-condensation operation is required .
  • control unit when controlling the air conditioner to perform a self-cleaning operation, is configured to increase or maintain the operating frequency of the compressor, and reduce the rotation speed of the indoor fan or turn off the indoor fan to frost the surface of the heat exchanger indoors; and After frosting on the surface of the heat exchanger inside the air conditioner, the air conditioner is switched to the heating mode to defrost the surface of the heat exchanger inside the air conditioner.
  • the air conditioner further includes a humidity sensor for detecting humidity in the room, the humidity sensor transmitting the detected data to the communication unit; the microcontroller further includes a second determining unit, configured to The preset condition determines whether anti-condensation operation is required.
  • the second preset condition includes: if the indoor humidity RH is greater than the set threshold RHt, or the indoor humidity RH continues to be greater than the set threshold RHt for a set time period, an anti-condensation operation is required.
  • the set threshold RHt ranges from 60% to 90%.
  • the set threshold RHt is 60%, 65%, 70%, 75%, 80%, 85% or 90%.
  • control unit is further configured to obtain indoor humidity during the frosting of the heat exchanger surface of the air conditioner and activate the second determining unit, and improve the operation of the air conditioner compressor when the anti-condensation operation is required Frequency, or extend the time of frosting, or increase the operating frequency of the air conditioner compressor and extend the frosting time.
  • control unit is further configured to obtain indoor humidity after starting the self-cleaning operation of the air conditioner and start the second determining unit, and reduce the operating frequency of the air conditioner compressor when the anti-condensation operation is required, or decrease
  • the opening of the small throttle member reduces the operating frequency of the air conditioner compressor and reduces the opening of the throttle member.
  • control unit proportionally reduces the operating frequency of the air conditioner compressor.
  • the ratio is a fixed ratio or a variable ratio.
  • the fixed ratio ranges from 60% to 90%.
  • the fixed ratio is 60%, 65%, 70%, 75%, 80%, 85% or 90%.
  • variable ratio value is proportional to the difference ⁇ RH between the indoor humidity and the set threshold.
  • the value of b ranges from 0.1 to 0.4.
  • b 0.1, 0.2, 0.3 or 0.4.
  • the plurality of temperature sensors includes a first temperature sensor for detecting the indoor coil temperature T1 and a second temperature sensor for detecting the outdoor coil temperature T2.
  • the first preset condition includes: if the indoor coil temperature T1 ⁇ t1 and the outdoor coil temperature T2 ⁇ t2, an anti-condensation operation is required; wherein t1 is the first set value, and t2 is the first Two set values.
  • the plurality of temperature sensors further includes a third temperature sensor for detecting the compressor vent temperature T3.
  • the first preset condition includes: if the indoor coil temperature T1 ⁇ t1 and the outdoor coil temperature T2 ⁇ t2 and the compressor exhaust temperature T3 ⁇ t3, an anti-condensation operation is required; wherein t1 For the first set value, t2 is the second set value, and t3 is the third set value.
  • the embodiment of the invention provides a technical idea that is contrary to other existing anti-condensation technologies.
  • the self-cleaning mode of the air conditioner is turned on, and the surface temperature of the indoor heat exchanger is controlled to be lower than the dew point temperature by the self-cleaning mode.
  • a large amount of moisture in the air is condensed to form a frost or ice layer on the surface of the heat exchanger, and a large amount of moisture in the air is reduced to avoid condensation.
  • the self-cleaning of the air conditioner can be performed, which can be said to be multi-purpose, which greatly improves the user experience.
  • FIG. 1 is a schematic flow chart of a method for preventing condensation by self-cleaning according to an exemplary embodiment
  • FIG. 2 is a schematic flow chart of a method for preventing condensation by self-cleaning according to an exemplary embodiment
  • FIG. 3 is a schematic flow chart of a method for increasing the amount of frosting according to an exemplary embodiment
  • FIG. 4 is a schematic flow chart of an anti-condensation operation according to an exemplary embodiment
  • FIG. 5 is a schematic flow chart of a method for determining an anti-condensation operation according to an exemplary embodiment
  • FIG. 6 is a schematic flow chart of a method for determining an anti-condensation operation according to an exemplary embodiment
  • FIG. 7 is a block diagram of an air conditioner according to an exemplary embodiment
  • FIG. 8 is a block diagram of an air conditioner, according to an exemplary embodiment.
  • relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not require or imply any actual relationship between the entities or operations or order.
  • the terms “comprises” or “comprising” or “comprising” or any other variations are intended to encompass a non-exclusive inclusion, such that a process, method, or device that includes a plurality of elements includes not only those elements but also other items not specifically listed. Elements, or elements that are inherent to such a process, method, or device. An element defined by the phrase “comprising a " without further limitation does not exclude the existence of additional equivalent elements in the process, method, or device including the element.
  • the air in the indoor environment enters the interior of the indoor unit along the air inlet of the indoor unit, and is re-blowed into the indoor environment through the air outlet after the heat exchange piece is exchanged, During this process, impurities such as dust and large particles trapped in the indoor air will enter the indoor unit along with the airflow, although the dust filter installed at the air inlet of the indoor unit can filter most of the dust and particles. However, there will still be a small amount of tiny dust that cannot be completely blocked by filtration. With the long-term use of the air conditioner, the dust will gradually deposit on the surface of the heat exchange sheet, and the dust covering the outer surface of the heat exchanger is inferior in thermal conductivity.
  • the indoor unit of the air conditioner includes a self-cleaning mode to achieve timely cleaning of the air conditioner.
  • the self-cleaning mode mainly includes a frosting stage and a defrosting stage.
  • the air conditioner operates in a cooling mode, increases the operating frequency of the air conditioner compressor, and increases the refrigerant output of the indoor heat exchanger, thereby making the indoor
  • the moisture in the air can gradually condense into a frost or ice layer on the outer surface of the heat exchanger.
  • the condensed ice layer can be combined with the dust to peel the dust from the outer surface of the heat exchanger;
  • the air conditioner operates in the heating mode to increase the temperature of the outer surface of the heat exchanger, so that the frost layer condensed on the outer surface of the heat exchanger is melted, and the dust is collected into the water receiving tray along with the melted water flow, so that The self-cleaning purpose of the air conditioner can be achieved.
  • FIG. 1 is a schematic flow chart of a method for preventing condensation by self-cleaning, according to an exemplary embodiment. As shown in Figure 1, the method includes:
  • Step S101 Obtain a plurality of temperature data and determine whether an anti-condensation operation is required according to the first preset condition.
  • common temperature parameters include: indoor temperature, outdoor temperature, indoor coil temperature, outdoor coil Temperature, indoor unit inlet temperature, indoor unit outlet temperature, compressor suction port temperature, and compressor exhaust port temperature.
  • different temperature parameters of the above-mentioned common temperature parameters may be selected for different operations, and different judgment conditions are set for the specific values of the selected plurality of parameters to determine the node that starts the control process. For example, in some embodiments, determining whether to activate the air conditioning refrigeration or heating mode is based on the indoor temperature and the outdoor temperature, and in some embodiments determining whether to activate the dehumidification mode or the like based on the indoor temperature and the indoor unit air outlet temperature.
  • temperature data optionally, measured by a temperature sensor provided by the air conditioning system, or obtained by using a network to obtain temperature data detected by other devices, or calculated by other data.
  • Obtain a certain temperature data optionally, measured by a temperature sensor provided by the air conditioning system, or obtained by using a network to obtain temperature data detected by other devices, or calculated by other data.
  • the first preset condition is a determination condition for determining whether to start the anti-condensation operation.
  • Step 102 If an anti-condensation operation is required, the air conditioner is controlled to perform a self-cleaning operation to prevent condensation.
  • the air conditioner is controlled to perform a self-cleaning operation to prevent condensation, and the moisture in the air is condensed by the frosting stage of the self-cleaning mode.
  • Frost or ice layer and attached to the outer surface of the heat exchanger, reducing the humidity of the indoor air, avoiding condensation, melting the frost layer condensed on the outer surface of the heat exchanger into water through the defrosting stage, and collecting the water Discharge the water tray to avoid dripping onto other air-conditioning components and create safety hazards and reduce the life of air-conditioning components.
  • Self-cleaning is achieved by self-cleaning and self-cleaning of the air conditioner.
  • the invention proposes a technical idea which is completely opposite to other existing anti-condensation technologies.
  • the self-cleaning mode of the air conditioner is turned on, and the surface temperature of the indoor heat exchanger is controlled to be lower than the dew point temperature by the self-cleaning mode.
  • This embodiment not only can effectively prevent the occurrence of condensation, but also does not affect the effect of air conditioning refrigeration, and can also perform self-cleaning of the air conditioner, which can be said to be multi-purpose, greatly improving the user experience.
  • FIG. 2 is a schematic flow chart of a method for preventing condensation by self-cleaning according to an exemplary embodiment. As shown in Figure 2, the method includes:
  • step S201 a plurality of temperature data are obtained and it is determined according to the first preset condition whether an anti-condensation operation is required.
  • step S202 if the anti-condensation operation is required, the operating frequency of the compressor is raised or maintained, and the rotation speed of the indoor fan is reduced or the indoor fan is turned off.
  • step S202 realizes the frosting stage of the self-cleaning mode.
  • the air conditioning system is preset to the self-cleaning mode.
  • the limiting condition includes at least the operating frequency of the compressor being greater than or equal to a set value, ensuring that the compressor operates at a higher frequency, and the refrigerant output of the indoor heat exchanger is larger, the heat exchanger is The outer surface is at least below the dew point temperature.
  • the operating frequency of the compressor When the current operating frequency of the compressor meets the requirements of the self-cleaning mode for the operating frequency of the compressor, the operating frequency of the compressor is kept constant, and the current operating frequency of the compressor is lower than the operating frequency of the compressor preset for the self-cleaning mode. When the value is increased, the operating frequency of the compressor is increased. At the same time, the speed of the indoor fan is reduced or the indoor fan is turned off to accelerate the rate at which the moisture in the indoor air condenses into frost or ice on the outer surface of the heat exchanger to avoid condensation.
  • step S203 the air conditioner is switched to the heating mode.
  • step S203 realizes the defrosting stage of the self-cleaning mode, and after the operation of the frosting process in the self-cleaning mode and frosting on the surface of the heat exchanger in the air-conditioned room, the surface of the heat exchanger in the air-conditioning room is prevented from frosting. Thick, affecting heat exchange efficiency, need to perform the defrosting stage.
  • the air conditioner is switched to the heating mode, and the surface temperature of the air conditioner indoor heat exchanger rises, so that the surface of the air conditioner heat exchanger is defrosted, and at the same time, the defrosting process proceeds, deposition The dust adhering to the surface of the heat exchange sheet drops into the water tray as the water droplets drip.
  • the air conditioning operation cooling mode is required, so the defrosting process is not easy to last for too long.
  • the air conditioner exits the self-cleaning mode and switches back to the cooling mode, and performs the cooling control process according to the target temperature set by the user.
  • the self-cleaning mode of the air conditioner is turned on, by increasing or maintaining the operating frequency of the compressor, and reducing the indoor temperature.
  • the speed of the fan or the closed indoor fan controls the surface temperature of the indoor heat exchanger to be lower than the dew point temperature, so that a large amount of moisture in the air is condensed, a frost or ice layer is formed on the surface of the heat exchanger, and then the air conditioner is switched to the heating mode.
  • the surface of the heater is frosted or ice layered, that is, the self-cleaning of the air conditioner is realized, and the embodiment can not only effectively prevent the occurrence of condensation, but also does not affect the effect of air conditioning refrigeration, and can also perform self-cleaning of the air conditioner. More, it greatly enhances the user experience.
  • FIG. 3 is one according to an embodiment.
  • a schematic flow chart of a method for increasing the amount of frosting comprising:
  • step S301 indoor humidity is obtained.
  • step S302 it is determined whether the anti-condensation operation needs to be performed according to the second preset condition. If the indoor humidity meets the second preset condition, the anti-condensation operation needs to be performed, and step S303 is performed; otherwise, the current working state is maintained. In some embodiments, if the indoor humidity does not satisfy the second preset condition, step S203 is performed to switch the air conditioner to the heating mode to enter the defrosting stage.
  • the second preset condition may be different in different embodiments.
  • the second preset condition is that the indoor humidity RH is greater than the set threshold RHt.
  • the set threshold RHt ranges from 60% to 90%.
  • the set threshold RHt is 60%, 65%, 70%, 75%, 80%, 85% or 90%.
  • the value of the set threshold is related to the set target temperature of the air conditioner. The lower the set target temperature is, the smaller the value of the set threshold is, for example, when the target set temperature is 20 ° C.
  • the set threshold RHt is 65%, and when the target set temperature is 27 °C, the set threshold RHt is 80%.
  • the set target temperature is low, the outlet air temperature is low. Therefore, under the same humidity condition, when the target temperature is set lower, condensation is more likely to occur. If the anti-condensation operation needs to be performed in advance, the lower the target temperature is set. The smaller the value of the set threshold is.
  • the second preset condition is that the indoor humidity RH continues to be greater than the set threshold RHt for a set time period.
  • the value of the set duration is related to the set target temperature.
  • the indoor humidity RH is constant
  • the lower the set target temperature is, the lower the outlet temperature is, and the condensation is easy to occur. Therefore, it is necessary to prevent the condensation in advance.
  • the set value is smaller.
  • step S303 the operating frequency of the air conditioner compressor is increased, or the frosting time is extended, or the operating frequency of the air conditioner compressor is increased and the frosting time is prolonged.
  • the frosting rate should be accelerated, so the operating frequency of the air conditioner compressor is increased to increase the refrigerant output to the indoor heat exchanger, or to extend the knot.
  • the time of the frost is to condense more moisture in the air on the surface of the indoor heat exchanger, reduce the humidity of the air, or increase the operating frequency of the air conditioner compressor while prolonging the frosting time.
  • step S103 and step S203 are performed, in order to avoid that the indoor humidity is still large after a single self-cleaning operation is performed, there is a possibility that condensation may occur, and further development is required.
  • Anti-condensation there are many ways to further prevent condensation.
  • FIG. 4 is a schematic flow chart of an anti-condensation operation according to an embodiment, including:
  • step S401 indoor humidity is obtained.
  • Step S402 judging whether it is necessary to perform an anti-condensation operation according to the second preset condition, if necessary, executing step S403, reducing the operating frequency of the air conditioner compressor, or reducing the opening degree of the throttle member, or reducing the air conditioner compressor Run the frequency and reduce the opening of the throttling component.
  • the second preset condition is that the indoor humidity RH is greater than the set threshold RHt as described in the foregoing embodiment, or the second preset condition is that the indoor humidity RH continues to be greater than the set threshold RHt for a set time period.
  • the second preset condition is the same at different stages, and in some alternative embodiments, the second preset condition is different at different stages.
  • the self-cleaning mode is quickly started, and the second preset condition is that the indoor humidity RH is greater than the set threshold RHt.
  • the air humidity is lowered.
  • the second preset condition is that the indoor humidity RH continues to be longer than the set threshold RHt for the set time period.
  • the operating frequency of the air conditioner compressor is reduced, or the opening degree of the throttle member is reduced, or the operating frequency of the air conditioner compressor is lowered.
  • the opening of the throttling component is reduced to reduce the amount of refrigerant output to the indoor heat exchanger, and the outlet air temperature is raised above the dew point temperature to avoid condensation.
  • the operating frequency of the air conditioner compressor is proportionally reduced, and the value of the compressor operating frequency is prevented from being large, so that the temperature of the air conditioner is fluctuated greatly, causing discomfort to the human body.
  • the ratio is a fixed ratio.
  • the fixed ratio ranges from 60% to 90%.
  • the fixed ratio is 60%, 65%, 70%, 75%, 80%, 85% or 90%.
  • the value of the ratio is related to the user-set temperature.
  • the user set temperature the lower the outlet temperature during the air-conditioning refrigeration process, the more likely the condensation will occur, and the operating frequency of the compressor should be reduced as soon as possible.
  • the lower the user set temperature the larger the value of the fixed ratio.
  • the ratio is a variable ratio.
  • variable ratio value is proportional to the difference ⁇ RH between the indoor humidity and the set threshold.
  • the value of c ranges from 1 to 4.
  • c 1, 2, 3 or 4.
  • the value of b ranges from 0.1 to 0.4.
  • b 0.1, 0.2, 0.3 or 0.4.
  • the ⁇ RH When the ⁇ RH is larger, the humidity in the room is larger, and condensation is likely to occur.
  • the air outlet temperature of the air conditioner should be increased as soon as possible to a temperature higher than the dew point. Therefore, the larger the ⁇ RH, the larger the value of the variable ratio, that is, the larger the value of c, or The larger the value of b is.
  • obtaining a plurality of temperature data and determining whether the anti-condensation operation is required according to the first preset condition includes various forms.
  • FIG. 5 is a schematic flow chart of a method for determining an anti-condensation operation according to an embodiment.
  • obtaining a plurality of temperature data and determining whether the anti-condensation operation is required according to the first preset condition specifically includes:
  • step S501 the indoor coil temperature T1 of the air conditioner and the outdoor coil temperature T2 are obtained.
  • step S502 it is determined whether the indoor coil temperature T1 ⁇ t1 and the outdoor coil temperature T2 ⁇ t2 are satisfied. If yes, step S503 is performed to determine that the anti-condensation operation needs to be performed. Otherwise, step S501 is performed. Where t1 is the first set value and t2 is the second set value.
  • FIG. 6 is a schematic flow chart of a method for determining an anti-condensation operation according to an embodiment.
  • obtaining a plurality of temperature data and determining whether the anti-condensation operation is required according to the first preset condition specifically includes:
  • step S601 the indoor coil temperature T1 of the air conditioner, the outdoor coil temperature T2, and the compressor exhaust port temperature T3 are obtained.
  • step S602 it is determined whether the indoor coil temperature T1 ⁇ t1 and the outdoor coil temperature T2 ⁇ t2 and the compressor exhaust temperature T3 ⁇ t3 are satisfied. If yes, step S603 is performed to determine that the anti-condensation operation is required. Otherwise, step S601 is performed. Where t1 is the first set value, t2 is the second set value, and t3 is the third set value.
  • a plurality of parameters are comprehensively determined whether it is necessary to perform an anti-condensation operation, and other operating conditions other than the anti-condensation operation of the air conditioner are taken into consideration, so that the control process is more accurate, and the operating state of the air conditioner is more in line with the user's needs. It avoids the temperature fluctuation during operation and brings discomfort to the human body.
  • FIG. 7 is a schematic structural diagram of an air conditioner according to an embodiment.
  • the air conditioner 100 includes: a plurality of temperature sensors, a microcontroller 701 and a compressor 702, wherein the microcontroller 701 includes a communication unit. 7011, a first judging unit 7012 and a control unit 7013.
  • the communication unit 7011 is configured to receive information data, where the information data includes temperature sensors, as shown, temperature sensors 1, temperature sensors 2, ..., temperature data detected by the temperature sensor n.
  • the first determining unit 7012 is configured to determine, according to the first preset condition, whether an anti-condensation operation is required.
  • the control unit 7013 is configured to control the air conditioner to perform a self-cleaning operation when the anti-condensation operation is required. Specifically, the control unit 7013 controls the operating frequency of the compressor 702 when the anti-condensation operation is required, the rotation speed of the indoor fan or the expansion valve. Opening.
  • the air conditioner provided by the invention can realize the self-cleaning mode of the air conditioner when the anti-condensation condition is met, and the surface temperature of the indoor heat exchanger is controlled to be lower than the dew point temperature by the self-cleaning mode, so that a large amount of moisture in the air is condensed on the surface of the heat exchanger. Form a frost or ice layer to achieve the effect of anti-condensation.
  • This embodiment not only can effectively prevent the occurrence of condensation, but also does not affect the effect of air conditioning refrigeration, and can also perform self-cleaning of the air conditioner, which can be said to be multi-purpose, greatly improving the user experience.
  • control unit 7013 when the air conditioner is controlled to perform a self-cleaning operation, is specifically configured to increase or maintain the operating frequency of the compressor, and reduce the rotation speed of the indoor fan or turn off the indoor fan to frost the surface of the heat exchanger indoors; And, after frosting on the surface of the heat exchanger of the air conditioner, the air conditioner is switched to the heating mode to defrost the surface of the heat exchanger in the air conditioner.
  • the air conditioner 100 further includes a humidity sensor 703 for detecting humidity in the room, the humidity sensor 703 transmits the detected data to the communication unit 7011, and the microcontroller 701 further includes a second determining unit 7014 for The preset condition determines whether anti-condensation operation is required.
  • the second preset condition may be different in different embodiments.
  • the second preset condition includes that the indoor humidity RH is greater than the set threshold RHt.
  • the setting threshold RHt ranges from 60% to 90%. Alternatively, the threshold RHt is set to be 60%, 65%, 70%, 75%, 80%, 85% or 90%.
  • the value of the set threshold is related to the set target temperature of the air conditioner. The lower the set target temperature is, the smaller the set threshold value is. For example, when the target set temperature is 20 ° C, the set threshold RHt is 65%. When the target set temperature is 27 ° C, the set threshold RHt is set to 80%. When the set target temperature is low, the outlet air temperature is low. Therefore, under the same humidity condition, when the target temperature is set lower, condensation is more likely to occur. If the anti-condensation operation needs to be performed in advance, the lower the target temperature is set. The smaller the value of the set threshold is.
  • the second preset condition indoor humidity RH continues to be greater than the set threshold RHt for a set time period.
  • the value of the set duration is related to the set target temperature.
  • the indoor humidity RH is constant
  • the lower the set target temperature is, the lower the outlet temperature is, and the condensation is easy to occur. Therefore, the anti-condensation operation needs to be performed in advance. , the smaller the set length is.
  • the control unit 7013 in order to improve the anti-condensation effect, it is required to increase the amount of frosting in the frosting stage of the self-cleaning mode, and the control unit 7013 is also used to obtain the indoor humidity during the frosting of the heat exchanger surface of the air-conditioned room.
  • the second judging unit 7014 is activated, and the operating frequency of the air conditioner compressor 702 is raised when the anti-condensation operation is required, or the frosting time is extended, or the operating frequency of the air conditioner compressor 702 is raised and the frosting time is prolonged.
  • the control unit 7013 is also used to control the air conditioner for self-cleaning.
  • the indoor humidity is obtained after the operation and the second judging unit 7014 is started, and the operating frequency of the air conditioner compressor 702 is lowered, or the opening degree of the throttle member is reduced, or the operating frequency of the air conditioner compressor 702 is lowered when the anti-condensation operation is required.
  • the opening of the throttling component is reduced to reduce the amount of refrigerant output to the indoor heat exchanger, and the outlet air temperature is raised above the dew point temperature to avoid condensation.
  • control unit 7013 scales down the operating frequency of air conditioner compressor 702.
  • the ratio is a fixed ratio or a variable ratio.
  • the fixed ratio ranges from 60% to 90%.
  • the fixed ratio is 60%, 65%, 70%, 75%, 80%, 85% or 90%.
  • variable ratio value is proportional to the difference ⁇ RH between the indoor humidity and the set threshold.
  • the value of b ranges from 0.1 to 0.4.
  • b 0.1, 0.2, 0.3 or 0.4.
  • obtaining a plurality of temperature data and determining whether the anti-condensation operation is required according to the first preset condition includes various forms.
  • the plurality of temperature sensors in the air conditioner 100 include a first temperature sensor for detecting the indoor coil temperature T1 and a second temperature sensor for detecting the outdoor coil temperature T2.
  • the communication unit 7011 is configured to receive temperature data detected by the first temperature sensor and the second temperature sensor.
  • the first preset condition includes: if the indoor coil temperature T1 ⁇ t1 and the outdoor coil temperature T2 ⁇ t2, an anti-condensation operation is required; wherein t1 is the first setting The value, t2 is the second set value.
  • the plurality of temperature sensors in the air conditioner 100 include: a first temperature sensor for detecting the indoor coil temperature T1, a second temperature sensor for detecting the outdoor coil temperature T2, and for detecting the compressor exhaust
  • the communication unit 7011 is configured to receive temperature data detected by the first temperature sensor, the second temperature sensor, and the third temperature sensor.
  • the first preset condition includes: if the indoor coil temperature T1 ⁇ t1 and the outdoor coil temperature T2 ⁇ t2 and the compressor exhaust temperature T3 ⁇ t3, then anti-coagulation is required Exposure operation; wherein t1 is the first set value, t2 is the second set value, and t3 is the third set value.
  • a plurality of parameters are comprehensively determined whether it is necessary to perform an anti-condensation operation, and other operating conditions other than the anti-condensation operation of the air conditioner are taken into consideration, so that the control process is more accurate, and the operating state of the air conditioner is more in line with the user's needs. It avoids the temperature fluctuation during operation and brings discomfort to the human body.
  • non-transitory computer readable storage medium comprising instructions, such as a memory comprising instructions executable by a processor to perform the methods described above.
  • the above non-transitory computer readable storage medium may be a read only memory (ROM), a random access memory (RAM), a magnetic tape, an optical storage device, or the like.
  • the disclosed methods, products may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

L'invention concerne un procédé d'exécution d'une manœuvre de nettoyage automatique qui permet d'éviter la génération d'eau de condensat, ainsi qu'un climatiseur associé. Le procédé consiste : à acquérir de multiples éléments d'information de température et à déterminer, selon une première condition préétablie, si l'exécution d'une manœuvre qui permet d'éviter la génération d'eau de condensat est nécessaire (S101) ; si tel est le cas, à commander un climatiseur afin que celui-ci exécute une manœuvre de nettoyage automatique qui permet d'éviter la génération d'eau de condensat. La présente invention permet d'éviter efficacement la génération d'eau de condensat sans avoir d'incidence sur l'efficacité de refroidissement d'un climatiseur, tout en permettant un nettoyage automatique de ce dernier.
PCT/CN2018/120476 2018-01-31 2018-12-12 Procédé d'exécution de manœuvre de nettoyage automatique permettant d'éviter la génération d'eau de condensat et climatiseur associé WO2019148973A1 (fr)

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