CN111912080A - Air conditioner and self-cleaning method - Google Patents

Air conditioner and self-cleaning method Download PDF

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Publication number
CN111912080A
CN111912080A CN202010455304.2A CN202010455304A CN111912080A CN 111912080 A CN111912080 A CN 111912080A CN 202010455304 A CN202010455304 A CN 202010455304A CN 111912080 A CN111912080 A CN 111912080A
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China
Prior art keywords
preset
temperature
air conditioner
relation table
current
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CN202010455304.2A
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Chinese (zh)
Inventor
尹磊
王乐三
刘晓飞
张明磊
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Hisense Shandong Air Conditioning Co Ltd
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Hisense Shandong Air Conditioning Co Ltd
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Priority to CN202010455304.2A priority Critical patent/CN111912080A/en
Publication of CN111912080A publication Critical patent/CN111912080A/en
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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
    • 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
    • F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • 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
    • 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
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature

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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)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses an air conditioner and a self-cleaning method, which can realize that the air conditioner automatically judges whether an indoor heat exchanger is dirty or not by obtaining the current temperature of an intelligent power module, and then the service life of an air conditioner product and the user experience are improved.

Description

Air conditioner and self-cleaning method
Technical Field
The application relates to the technical field of air conditioner cleaning, in particular to an air conditioner and a self-cleaning method.
Background
Air conditioners have become more and more popular in life, and now, the functional requirements of users on the air conditioners are higher and higher, and when the air conditioners are used for a long time or are placed in a storage process and are used in an environment with excessive dust, a large amount of dust is easily accumulated on the heat exchangers of the air conditioners, so that the performance of the air conditioners is reduced, and the service life of the air conditioners is shortened.
In the prior art, the dirty degree of a heat exchanger in an air conditioner is generally estimated according to the starting time, or a user judges whether the air conditioner needs to be cleaned according to the use condition, but the prior art does not consider the influence of the air quality, the operation mode and the like on the dust accumulation speed in the heat exchanger in the actual operation process of the air conditioner, the estimation accuracy of the dirty degree of the heat exchanger in the air conditioner is low, the heat exchanger cannot be accurately judged whether the heat exchanger needs to be cleaned, and the use experience of the user is reduced.
Therefore, how to automatically and accurately judge whether the heat exchanger filth blockage degree of the air conditioner needs to be cleaned or not, so as to improve the service life of the air conditioner product and the user experience, has become a technical problem to be solved by technical personnel in the field.
Disclosure of Invention
The invention provides an air conditioner and a self-cleaning method, which are used for solving the technical problem of how to automatically and accurately judge whether the filth blockage degree of a heat exchanger of the air conditioner needs cleaning.
In an air conditioner provided in a preferred embodiment of the present invention, the air conditioner includes:
the refrigerant circulation loop circulates the refrigerant in a loop formed by the compressor, the condenser, the expansion valve, the evaporator, the four-way valve and the pressure reducer;
the compressor is used for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharging the high-temperature and high-pressure refrigerant gas to the condenser;
one of the outdoor heat exchanger and the indoor heat exchanger works for the condenser, and the other works for the evaporator;
the four-way valve is used for controlling the flow direction of the refrigerant in the refrigerant loop so as to switch the outdoor heat exchanger and the indoor heat exchanger between the condenser and the evaporator;
an indoor environment temperature sensor for detecting an indoor environment temperature;
the indoor coil temperature sensor is used for detecting the temperature of the indoor coil;
the controller is used for acquiring the current temperature of the intelligent power module;
determining the preset temperature of the intelligent power module according to a first preset relation table or a second preset relation table, wherein the first preset relation table or the second preset relation table is a corresponding relation table between the preset ambient temperature of the controller and the preset temperature of the intelligent power module when the air conditioner is in different states;
and if the current temperature is not higher than the preset temperature, determining that the indoor heat exchanger is dirty and blocked.
In the air conditioner provided in the preferred embodiment of the present invention, the controller is further configured to:
acquiring the detection temperature of the intelligent power module and the current environment temperature of the controller;
and when the current environment temperature is not equal to the preset environment temperature, acquiring a difference value obtained by subtracting the preset environment temperature from the current environment temperature, and determining the current temperature according to the detected temperature and the difference value.
In the air conditioner provided in the preferred embodiment of the present invention, the air conditioner further includes an air deflector, and the controller is further configured to:
judging whether the air deflector is in a static state or not;
if the air deflector is in a static state, determining the preset temperature and the preset environment temperature according to the current wind shield and the first preset relation table;
if the air deflector is in a non-static state, determining the preset temperature and the preset environment temperature according to the current wind shield and the second preset relation table;
the first preset relation table is a corresponding relation table between the preset ambient temperature and the preset temperature of the air conditioner under different wind gears when the air deflector is in a static state, and the second preset relation table is a corresponding relation table between the preset ambient temperature and the preset temperature of the air conditioner under different wind gears when the air deflector is in a non-static state.
In the air conditioner provided in the preferred embodiment of the present invention, the controller is further configured to:
and acquiring the running time of the air conditioner, and acquiring the current temperature when the running time is longer than the preset running time.
In the air conditioner provided in the preferred embodiment of the present invention, the air conditioner further includes a display screen, and the controller is further configured to:
and displaying prompt information of whether the indoor heat exchanger is dirty and blocked and whether the indoor heat exchanger enters a preset indoor self-cleaning mode through the display screen, so that a user can enable the air conditioner to immediately enter the preset indoor self-cleaning mode according to the prompt information or enable the air conditioner to enter the preset indoor self-cleaning mode after being shut down.
Correspondingly, the embodiment of the invention also provides a self-cleaning method of an air conditioner, which is applied to the air conditioner comprising a refrigerant circulation loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a four-way valve, an indoor environment temperature sensor, an indoor coil temperature sensor, an intelligent power module and a controller, and the method comprises the following steps:
acquiring the current temperature of the intelligent power module;
determining the preset temperature of the intelligent power module according to a first preset relation table or a second preset relation table, wherein the first preset relation table or the second preset relation table is a corresponding relation table between the preset ambient temperature of the controller and the preset temperature of the intelligent power module when the air conditioner is in different states;
and if the current temperature is not higher than the preset temperature, determining that the indoor heat exchanger is dirty and blocked.
In the self-cleaning method for an air conditioner provided in the specific embodiment of the present invention, the obtaining of the current temperature of the intelligent power module specifically includes:
acquiring the detection temperature of the intelligent power module and the current environment temperature of the controller;
and when the current environment temperature is not equal to the preset environment temperature, acquiring a difference value obtained by subtracting the preset environment temperature from the current environment temperature, and determining the current temperature according to the detected temperature and the difference value.
In the self-cleaning method of an air conditioner provided in an embodiment of the present invention, the air conditioner further includes an air deflector, and the method further includes:
judging whether the air deflector is in a static state or not;
if the air deflector is in a static state, determining the preset temperature and the preset environment temperature according to the current wind shield and the first preset relation table;
and if the air deflector is in a non-static state, determining the preset temperature and the preset environment temperature according to the current wind shield and the second preset relation table.
The first preset relation table is a corresponding relation table between the preset ambient temperature and the preset temperature of the air conditioner under different wind gears when the air deflector is in a static state, and the second preset relation table is a corresponding relation table between the preset ambient temperature and the preset temperature of the air conditioner under different wind gears when the air deflector is in a non-static state.
In the self-cleaning method for an air conditioner according to the specific embodiment of the present invention, before the obtaining of the current temperature of the intelligent power module, the method further includes:
and acquiring the running time of the air conditioner, and acquiring the current temperature when the running time is longer than the preset running time.
In the self-cleaning method of an air conditioner according to an embodiment of the present invention, the air conditioner further includes a display screen, and after it is determined that the indoor heat exchanger is dirty and blocked, the method further includes:
and displaying prompt information of whether the indoor heat exchanger is dirty and blocked and whether the indoor heat exchanger enters a preset indoor self-cleaning mode through the display screen, so that a user can enable the air conditioner to immediately enter the preset indoor self-cleaning mode according to the prompt information or enable the air conditioner to enter the preset indoor self-cleaning mode after being shut down.
Compared with the prior art, the invention has the following technical effects:
the invention discloses an air conditioner and a self-cleaning method, which are applied to the air conditioner comprising a refrigerant circulation loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a four-way valve, an indoor environment temperature sensor, an indoor coil temperature sensor, an intelligent power module and a controller, then determining the preset temperature of the intelligent power module according to the first preset relation table or the second preset relation table, the first preset relation table or the second preset relation table is the corresponding relation between the preset environment temperature of the controller and the preset temperature of the intelligent power module when the air conditioner is in different states, if the current temperature of the intelligent module is not more than the preset temperature of the intelligent module, the invention can realize that the air conditioner can automatically judge whether the heat exchanger is dirty or not, thereby prolonging the service life of the air conditioner product and improving the user experience.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a perspective view showing an external appearance of an air conditioner of an embodiment;
fig. 2 is a circuit diagram showing an outline of the structure of the air conditioner of the embodiment;
FIG. 3 is a schematic view showing the construction of an air conditioner in the preferred embodiment of the present application;
FIG. 4 is a flow chart of a self-cleaning mode of the air conditioner in accordance with an exemplary embodiment of the present invention;
fig. 5 is a flow chart of the determination of dirty heat exchanger according to the exemplary embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
As described in the background art, when a fan motor in an air conditioner is locked up in the prior art, a condenser cannot exchange heat with the outdoor environment, and the compressor is damaged due to long-time operation.
To solve the above problems, the preferred embodiment of the present invention provides an air conditioner, as shown in fig. 3, for automatically turning on the air conditioner to prevent the user from heatstroke or cold in high or cold indoor conditions.
The application protects an air conditioner specifically does:
the refrigerant circulation circuit 301 circulates a refrigerant in a circuit including a compressor, a condenser, an expansion valve, an evaporator, a four-way valve, and a pressure reducer.
The air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.
The compressor 302 is configured to compress a low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure refrigerant gas, and discharge the high-temperature and high-pressure refrigerant gas to the condenser.
In a preferred embodiment of the present application, the compressor compresses a refrigerant gas in a high temperature and high pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.
An outdoor heat exchanger and an indoor heat exchanger 303, one of which operates for the condenser and the other of which operates for the evaporator.
The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.
The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.
A four-way valve 304 for controlling a flow direction of a refrigerant in the refrigerant circuit to switch between the outdoor heat exchanger and the indoor heat exchanger as the condenser and the evaporator;
the air conditioner 1 shown in fig. 1 includes: the indoor unit 3 is exemplified by an indoor unit (shown in the figure), and the indoor unit is usually mounted on an indoor wall surface WL or the like. For another example, an indoor cabinet (not shown) is also an indoor unit of the indoor unit.
The outdoor unit 2 is generally installed outdoors and used for heat exchange in an indoor environment. In the illustration of fig. 1, the outdoor unit 2 is indicated by a broken line because the outdoor unit 2 is located outdoors on the opposite side of the indoor unit 3 with respect to the wall surface WL.
Fig. 2 shows a circuit configuration of an air conditioner 1, and the air conditioner 1 includes a refrigerant circuit 10, and is capable of executing a vapor compression refrigeration cycle by circulating a refrigerant in the refrigerant circuit 10. The indoor unit 3 and the outdoor unit 2 are connected by a connecting pipe 4 to form a refrigerant circuit 10 in which a refrigerant circulates.
And an indoor ambient temperature sensor 305 for detecting and collecting the indoor ambient temperature.
And an indoor coil temperature sensor 306 for detecting and collecting the indoor coil temperature.
A controller 307 for obtaining a current temperature of the smart power module;
determining the preset temperature of the intelligent power module according to a first preset relation table or a second preset relation table, wherein the first preset relation table or the second preset relation table is a corresponding relation table between the preset ambient temperature of the controller and the preset temperature of the intelligent power module when the air conditioner is in different states;
and if the current temperature is not higher than the preset temperature, determining that the indoor heat exchanger is dirty and blocked.
The intelligent Power module ipm (intelligent Power module) is an advanced Power switch device in a controller, and has the advantages of GTR (Transistor) high current density, low saturation voltage and high voltage resistance, and MOSFET (Metal Oxide Semiconductor Field Effect Transistor) high input impedance, high switching frequency and low driving Power.
Because the temperature change of the intelligent power module is positively correlated with the current change caused by the filthy blockage of the heat exchanger, if the current temperature of the intelligent power module is less than or equal to the preset temperature of the intelligent power module, the current of the fan is smaller, the current load of the fan is smaller, the air intake of the air conditioner is smaller, namely the heat exchanger at the air inlet of the indoor unit of the air conditioner is filthy blocked, so that the current change caused by the filthy blockage of the indoor heat exchanger can be truly reflected by detecting the temperature change of the intelligent power module, the detection reliability is higher, in addition, the filthy blockage detection method of the indoor heat exchanger directly compares the temperature detection result with the preset temperature, the temperature detection result does not need to be reconstructed by a driving algorithm, the time spent in the detection process is shorter, and whether the indoor heat exchanger needs to be cleaned or not can be quickly and accurately, and informs the user that the indoor heat exchanger is dirty.
Specifically, the controller obtains the current temperature of the intelligent power module, and determines the preset temperature of the intelligent power module according to a first preset relation table or a second preset relation table, where the first preset relation table or the second preset relation table is pre-stored and is a corresponding relation table between the preset ambient temperature of the controller of the air conditioner and the preset temperature of the intelligent power module in different states.
And then comparing the determined preset temperature of the intelligent power module with the current temperature of the intelligent power module, and if the current temperature is less than or equal to the preset temperature, determining that the indoor heat exchanger is dirty and blocked.
In order to determine the current temperature of the smart power module more accurately, in a preferred embodiment of the present application, the controller is further configured to:
acquiring the detection temperature of the intelligent power module and the current environment temperature of the controller;
and when the current environment temperature is not equal to the preset environment temperature, acquiring a difference value obtained by subtracting the preset environment temperature from the current environment temperature, and determining the current temperature according to the detected temperature and the difference value.
Specifically, in practical applications, the environment where the air conditioner is located may be summer with a high ambient temperature or winter with a low ambient temperature, and in order to reduce the influence of the ambient temperature on the judgment of the air conditioner in practical applications, the change of the ambient temperature needs to be considered in the present invention.
Firstly, the detection temperature of the intelligent power module and the current environment temperature of the controller are obtained, then whether the current environment temperature of the controller is equal to the preset environment temperature of the controller or not is judged, if not, the preset environment temperature of the controller is subtracted from the current environment temperature of the controller, and the obtained difference value and the detection temperature of the intelligent power module are taken as the current temperature of the intelligent power module.
It should be noted that the above solution of the preferred embodiment is only a specific implementation solution proposed in the present application, and other ways of adjusting the temperature of the smart power module according to the ambient temperature all belong to the protection scope of the present application.
In order to determine the first preset relationship table and the second preset relationship table more accurately, in a preferred embodiment of the present application, the air conditioner further includes an air deflector, and the controller is further configured to:
judging whether the air deflector is in a static state or not;
if the air deflector is in a static state, determining the preset temperature and the preset environment temperature according to the current wind shield and the first preset relation table;
and if the air deflector is in a non-static state, determining the preset temperature and the preset environment temperature according to the current wind shield and the second preset relation table.
The first preset relation table is a corresponding relation table between the preset ambient temperature and the preset temperature of the air conditioner under different wind gears when the air deflector is in a static state, and the second preset relation table is a corresponding relation table between the preset ambient temperature and the preset temperature of the air conditioner under different wind gears when the air deflector is in a non-static state.
Specifically, a first preset relation table and a second preset relation table are established in advance, the first preset relation table is a corresponding relation table between the preset environment temperature of the controller and the preset temperature of the intelligent power module under different wind gears when an air deflector in the air conditioner is in a static state, and the second preset relation table is a corresponding relation table between the preset environment temperature of the controller and the preset temperature of the intelligent power module under different wind gears when the air deflector in the air conditioner is in a non-static or swinging state.
When the preset ambient temperature of the controller and the preset temperature of the intelligent power module are determined, the preset ambient temperature and the preset temperature are determined according to the current state of the air conditioner, such as whether the air deflector is static or not and the gear of a wind gear.
It should be noted that the above solution of the preferred embodiment is only a specific implementation solution proposed in the present application, and other ways of determining the preset ambient temperature of the controller and the preset temperature of the intelligent power module according to the state of the air conditioner belong to the protection scope of the present application.
In order to reasonably judge the fouling of the heat exchanger, in a preferred embodiment of the present application, the controller is further configured to:
and acquiring the running time of the air conditioner, and acquiring the current temperature when the running time is longer than the preset running time.
Specifically, a preset operation time or a detection period may be preset, the actual operation time of the air conditioner is obtained through the controller, and when the actual operation time of the air conditioner is longer than or not shorter than the preset operation time, the judgment on whether the heat exchanger is dirty or not may be performed.
In order to improve the user experience, in a preferred embodiment of the present application, the air conditioner further includes a display screen, and the controller is further configured to:
and displaying prompt information of whether the indoor heat exchanger is dirty and blocked and whether the indoor heat exchanger enters a preset indoor self-cleaning mode through the display screen, so that a user can enable the air conditioner to immediately enter the preset indoor self-cleaning mode according to the prompt information or enable the air conditioner to enter the preset indoor self-cleaning mode after being shut down.
Specifically, the controller may send the filth blockage information of the heat exchanger to the display screen for displaying, and prompt the user whether to enter the preset indoor self-cleaning mode, and the user may decide to perform the self-cleaning of the air conditioner immediately or to enter the preset indoor self-cleaning mode after the air conditioner is turned off to perform the self-cleaning of the heat exchanger.
It should be noted that the above solution of the preferred embodiment is only one specific implementation proposed in the present application, and other ways of indicating to a user and selecting when to enter the preset self-cleaning mode according to the dirty condition of the heat exchanger belong to the protection scope of the present application.
By applying the technical scheme, the current temperature of the intelligent power module is obtained, the preset temperature of the intelligent power module is determined according to the first preset relation table or the second preset relation table, the first preset relation table or the second preset relation table is the corresponding relation between the preset environment temperature of the controller of the air conditioner in different states and the preset temperature of the intelligent power module, and if the current temperature of the intelligent module is not greater than the preset temperature of the intelligent module, the indoor heat exchanger is determined to be dirty and blocked.
To further illustrate the technical idea of the present invention, a specific embodiment is proposed in combination with a specific application scenario to describe the technical solution of the present invention.
The specific embodiment of the present invention provides an air conditioner self-cleaning method, as shown in fig. 4, which is applied to an air conditioner including a refrigerant circulation loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a four-way valve, an indoor environment temperature sensor, an indoor coil temperature sensor, an intelligent power module, and a controller, and the method includes:
and S401, acquiring the current temperature of the intelligent power module.
In order to judge the heat exchanger fouling more reasonably, before acquiring the current temperature of the intelligent power module, the method further comprises the following steps:
and acquiring the running time of the air conditioner, and acquiring the current temperature when the running time is longer than the preset running time.
Specifically, the preset operation time t is presetaOr the detection period is that the current temperature of the intelligent power module is obtained and judged only when the current air conditioner operation time length is longer than the preset operation time length, the operation time length t of the air conditioner is obtained, and the operation time length t is longer than the preset operation time length taThen, the current temperature is obtained, and an operation time t is newly established1New operating time t1The starting time of the intelligent power module is the time for acquiring the current temperature of the intelligent power module, and fig. 5 is a schematic flow chart for determining dirty and blocked heat exchangers according to the embodiment of the present application.
In order to reduce the influence of the ambient temperature on the current temperature of the intelligent power module, in this embodiment of the present application, the obtaining the current temperature of the intelligent power module specifically includes:
acquiring the detection temperature of the intelligent power module and the current environment temperature of the controller;
and when the current environment temperature is not equal to the preset environment temperature, acquiring a difference value obtained by subtracting the preset environment temperature from the current environment temperature, and determining the current temperature according to the detected temperature and the difference value.
Specifically, the detection temperature T of the intelligent power module is obtained firstIPM(i-1) and the current ambient temperature T of the controlleraAnd determining the preset ambient temperature T 'of the controller according to the state of the air conditioner'aIf the current environment temperature of the controller is not equal to the preset environment temperature of the controller, subtracting the preset environment temperature of the controller from the current environment temperature of the controller to obtain a difference value delta T, and adding the difference value to the detected temperature of the intelligent power module to obtain the current temperature of the intelligent power module.
Or if the difference is greater than 0, the detected temperature plus the difference Δ T is taken as the current temperature T of the intelligent power moduleIPM. Such as TIPM(i)＝TIPM(i-1) + Δ T, if the difference is less than 0, the absolute value of the difference Δ T subtracted from the detected temperature is used as the current temperature of the intelligent power module, such as TIPM(i)＝TIPM(i-1) - | Δ T |, as shown in FIG. 5.
In order to better determine the relationship between the preset temperature of the intelligent power module and the preset ambient temperature of the controller, in a specific embodiment of the present application, the air conditioner further includes an air deflector, and the method further includes:
judging whether the air deflector is in a static state or not;
if the air deflector is in a static state, determining the preset temperature and the preset environment temperature according to the current wind shield and the first preset relation table;
and if the air deflector is in a non-static state, determining the preset temperature and the preset environment temperature according to the current wind shield and the second preset relation table.
The first preset relation table is a corresponding relation table between the preset ambient temperature and the preset temperature of the air conditioner under different wind gears when the air deflector is in a static state, and the second preset relation table is a corresponding relation table between the preset ambient temperature and the preset temperature of the air conditioner under different wind gears when the air deflector is in a non-static state.
Specifically, when the air conditioner leaves a factory or runs normally, according to the static or non-static state of an air deflector in the air conditioner, the temperatures of the intelligent power modules corresponding to different wind gears of the air conditioner are used as preset temperatures and the ambient temperature of the controller is used as a preset ambient temperature, and a first preset relation table and a second preset relation table are established.
Step S402, determining the preset temperature of the intelligent power module according to a first preset relation table or a second preset relation table, wherein the first preset relation table or the second preset relation table is a corresponding relation table between the preset environment temperature of the controller and the preset temperature of the intelligent power module when the air conditioner is in different states.
Specifically, the preset temperature T 'of the smart power module may be determined through the first preset relationship table or the second preset relationship table based on the current state of the air conditioner'IPM。
Step S403, if the current temperature is not higher than the preset temperature, determining that the indoor heat exchanger is dirty and blocked.
Specifically, the determined current temperature T is judgedIPM(i) And preset temperature T'IPMIf the current temperature is less than or equal to the preset temperature, the heat exchanger can be determined to be dirty and blocked, and a self-cleaning mode can be performed.
In order to improve the user experience, in a specific embodiment of the present application, the air conditioner further includes a display screen, and after it is determined that the indoor heat exchanger is dirty, the method further includes:
and displaying prompt information of whether the indoor heat exchanger is dirty and blocked and whether the indoor heat exchanger enters a preset indoor self-cleaning mode through the display screen, so that a user can enable the air conditioner to immediately enter the preset indoor self-cleaning mode according to the prompt information or enable the air conditioner to enter the preset indoor self-cleaning mode after being shut down.
Specifically, the controller sends the information of the heat exchanger filth blockage and the entering of the preset indoor self-cleaning mode to the display screen for the user to select so as to determine that the self-cleaning is carried out immediatelyOr self-cleaning after the air conditioner is closed, and after the judgment is finished, the newly-built t is used1The comparison is made as the operation time period of the air conditioner and the preset operation time period of the air conditioner.
After the air conditioner enters the self-cleaning mode, no matter what operation mode the air conditioner is in, the outdoor unit part of the air conditioner stops firstly, the indoor unit part is switched to the refrigerating mode immediately, then the outdoor unit part selects the corresponding mode according to the operation mode of the indoor unit to start up and operate, after the operation is carried out for a period of time, the refrigerating mode is directly switched to the heating mode, the outdoor unit part operates for a period of time again under the heating mode, the indoor unit part and the outdoor unit part exit from the self-cleaning mode and recover to the mode before the self-cleaning mode, or the.
By applying the technical scheme, the current temperature of the intelligent power module is obtained, the preset temperature of the intelligent power module is determined according to the first preset relation table or the second preset relation table, the first preset relation table or the second preset relation table is the corresponding relation between the preset environment temperature of the controller and the preset temperature of the intelligent power module when the air conditioner is in different states, and if the current temperature of the intelligent module is not greater than the preset temperature of the intelligent module, the indoor heat exchanger is determined to be dirty and blocked.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented by hardware, and also by software plus a necessary general hardware platform. Based on such understanding, the technical solution of the present application may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.), and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the implementation scenarios of the present application.
Those skilled in the art will appreciate that the figures are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the figures are not necessarily required to practice the present application.
Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The above application serial numbers are for description purposes only and do not represent the superiority or inferiority of the implementation scenarios.
The above disclosure is only a few specific implementation scenarios of the present application, but the present application is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present application.

Claims (10)

1. An air conditioner, characterized in that the air conditioner comprises:
the refrigerant circulation loop circulates the refrigerant in a loop formed by the compressor, the condenser, the expansion valve, the evaporator, the four-way valve and the pressure reducer;
the compressor is used for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharging the high-temperature and high-pressure refrigerant gas to the condenser;
one of the outdoor heat exchanger and the indoor heat exchanger works for the condenser, and the other works for the evaporator;
the four-way valve is used for controlling the flow direction of the refrigerant in the refrigerant loop so as to switch the outdoor heat exchanger and the indoor heat exchanger between the condenser and the evaporator;
an indoor environment temperature sensor for detecting an indoor environment temperature;
the indoor coil temperature sensor is used for detecting the temperature of the indoor coil;
the controller is used for acquiring the current temperature of the intelligent power module;
determining the preset temperature of the intelligent power module according to a first preset relation table or a second preset relation table, wherein the first preset relation table or the second preset relation table is a corresponding relation table between the preset ambient temperature of the controller and the preset temperature of the intelligent power module when the air conditioner is in different states;
and if the current temperature is not higher than the preset temperature, determining that the indoor heat exchanger is dirty and blocked.
2. The controller of claim 1, wherein the controller is further configured to:
acquiring the detection temperature of the intelligent power module and the current environment temperature of the controller;
and when the current environment temperature is not equal to the preset environment temperature, acquiring a difference value obtained by subtracting the preset environment temperature from the current environment temperature, and determining the current temperature according to the detected temperature and the difference value.
3. The air conditioner of claim 1, further comprising a deflector, the controller further configured to:
judging whether the air deflector is in a static state or not;
if the air deflector is in a static state, determining the preset temperature and the preset environment temperature according to the current wind shield and the first preset relation table;
and if the air deflector is in a non-static state, determining the preset temperature and the preset environment temperature according to the current wind shield and the second preset relation table.
The first preset relation table is a corresponding relation table between the preset ambient temperature and the preset temperature of the air conditioner under different wind gears when the air deflector is in a static state, and the second preset relation table is a corresponding relation table between the preset ambient temperature and the preset temperature of the air conditioner under different wind gears when the air deflector is in a non-static state.
4. The air conditioner of claim 1, wherein the controller is further configured to:
and acquiring the running time of the air conditioner, and acquiring the current temperature when the running time is longer than the preset running time.
5. The air conditioner of claim 1, wherein the air conditioner further comprises a display screen, and the controller is further configured to:
and displaying prompt information of whether the indoor heat exchanger is dirty and blocked and whether the indoor heat exchanger enters a preset indoor self-cleaning mode through the display screen, so that a user can enable the air conditioner to immediately enter the preset indoor self-cleaning mode according to the prompt information or enable the air conditioner to enter the preset indoor self-cleaning mode after being shut down.
6. A self-cleaning method of an air conditioner is characterized in that the method is applied to the air conditioner comprising a refrigerant circulation loop, a compressor, an outdoor heat exchanger, an indoor heat exchanger, a four-way valve, an indoor environment temperature sensor, an indoor coil temperature sensor, an intelligent power module and a controller, and the method comprises the following steps:
acquiring the current temperature of the intelligent power module;
determining the preset temperature of the intelligent power module according to a first preset relation table or a second preset relation table, wherein the first preset relation table or the second preset relation table is a corresponding relation table between the preset ambient temperature of the controller and the preset temperature of the intelligent power module when the air conditioner is in different states;
and if the current temperature is not higher than the preset temperature, determining that the indoor heat exchanger is dirty and blocked.
7. The method according to claim 6, wherein the obtaining of the current temperature of the smart power module is specifically:
acquiring the detection temperature of the intelligent power module and the current environment temperature of the controller;
and when the current environment temperature is not equal to the preset environment temperature, acquiring a difference value obtained by subtracting the preset environment temperature from the current environment temperature, and determining the current temperature according to the detected temperature and the difference value.
8. The method of claim 6, wherein the air conditioner further comprises a wind deflector, the method further comprising:
judging whether the air deflector is in a static state or not;
if the air deflector is in a static state, determining the preset temperature and the preset environment temperature according to the current wind shield and the first preset relation table;
and if the air deflector is in a non-static state, determining the preset temperature and the preset environment temperature according to the current wind shield and the second preset relation table.
The first preset relation table is a corresponding relation table between the preset ambient temperature and the preset temperature of the air conditioner under different wind gears when the air deflector is in a static state, and the second preset relation table is a corresponding relation table between the preset ambient temperature and the preset temperature of the air conditioner under different wind gears when the air deflector is in a non-static state.
9. The method of claim 6, wherein prior to said obtaining the current temperature of the smart power module, the method further comprises:
and acquiring the running time of the air conditioner, and acquiring the current temperature when the running time is longer than the preset running time.
10. The method of claim 6, wherein the air conditioner further comprises a display screen, and after determining that the indoor heat exchanger is dirty, the method further comprises:
and displaying prompt information of whether the indoor heat exchanger is dirty and blocked and whether the indoor heat exchanger enters a preset indoor self-cleaning mode through the display screen, so that a user can enable the air conditioner to immediately enter the preset indoor self-cleaning mode according to the prompt information or enable the air conditioner to enter the preset indoor self-cleaning mode after being shut down.
CN202010455304.2A 2020-05-26 2020-05-26 Air conditioner and self-cleaning method Pending CN111912080A (en)

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Address after: No.1, Hisense Road, Nancun Town, Pingdu City, Qingdao City, Shandong Province 266700

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Address before: No.1, Hisense Road, Nancun Town, Pingdu City, Qingdao City, Shandong Province 266700

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Application publication date: 20201110