CN111623483A - Air conditioner and protection method thereof - Google Patents
Air conditioner and protection method thereof Download PDFInfo
- Publication number
- CN111623483A CN111623483A CN202010350698.5A CN202010350698A CN111623483A CN 111623483 A CN111623483 A CN 111623483A CN 202010350698 A CN202010350698 A CN 202010350698A CN 111623483 A CN111623483 A CN 111623483A
- Authority
- CN
- China
- Prior art keywords
- air conditioner
- indoor
- temperature
- indoor unit
- coil pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- F24F11/32—Responding to malfunctions or emergencies
-
- 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
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
-
- 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
- F24F11/52—Indication arrangements, e.g. displays
- F24F11/526—Indication arrangements, e.g. displays giving audible indications
-
- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- 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
- F24F11/88—Electrical aspects, e.g. circuits
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention discloses an air conditioner and a protection method thereof, wherein the air conditioner comprises: the inner machine coil temperature sensor is used for measuring the temperature of the inner machine coil; an indoor fan motor for generating an air flow of indoor air through the evaporator to promote heat exchange with the indoor air when in operation; the indoor unit controller is respectively connected with the indoor unit coil pipe temperature sensor and the indoor fan motor, and the indoor unit controller is used for: after the air conditioner is shut down, receiving the temperature of the indoor unit coil pipe measured by the indoor unit coil pipe temperature sensor; judging whether the anti-freezing protection condition is met according to the temperature of the coil pipe of the internal machine; and when the anti-freezing protection condition is judged to be met, controlling the indoor fan motor to operate. The air conditioner and the protection method thereof can prevent the air conditioner from being damaged due to the fact that the evaporator is greatly frozen, and improve the durability and the safety of the air conditioner.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a protection method thereof.
Background
At present, a single-board scheme is often adopted for a low-cost constant-speed air conditioner, and the air conditioner adopting the single-board scheme is characterized in that only an internal machine controller is adopted, an external machine controller is not adopted, and an external machine is completely controlled by the internal machine controller. Generally, for an air conditioner adopting a single board scheme, an external machine control object mainly comprises an alternating current fan motor and an alternating current contactor for controlling the start and stop of a compressor, and an internal machine control object mainly comprises an indoor fan motor, a first relay for controlling the alternating current contactor and a second relay for controlling the outdoor fan motor, wherein the internal machine controller controls the alternating current contactor through the first relay, so that the start and stop of the compressor are controlled through the alternating current contactor.
The inventor finds that the following technical problems exist in the prior art in the process of implementing the invention: when the air conditioner shuts down, indoor machine controller can the direct control indoor fan motor bring to rest, but to the compressor, indoor machine controller will control compressor bring to rest through first relay and ac contactor, but because first relay and ac contactor easily take place contact adhesion phenomenon and lose the effect of original control break-make, if contact adhesion phenomenon takes place for first relay and ac contactor when the air conditioner shuts down, then the compressor will unable normal disconnection, still be in the continuous operation, thereby cause and be in the compressor and move always and the state that indoor fan motor does not operate after the air conditioner shuts down, under the effect of refrigerant to the coil pipe, finally lead to the evaporimeter to freeze in a large number, cause the damage of air conditioner, take place serious safety problem even.
Disclosure of Invention
The embodiment of the invention provides an air conditioner and a protection method thereof, which can effectively solve the problem that in the prior art, a compressor continues to operate but an indoor fan motor does not operate after the air conditioner is shut down, so that the problem that an evaporator is greatly frozen is solved, the air conditioner is prevented from being damaged due to the fact that the evaporator is greatly frozen, and the durability and the safety of the air conditioner are improved.
An air conditioner provided in a first embodiment of the present invention includes:
the inner machine coil temperature sensor is used for measuring the temperature of the inner machine coil;
an indoor fan motor for generating an air flow of indoor air through the evaporator to promote heat exchange with the indoor air when in operation;
the indoor unit controller is respectively connected with the indoor unit coil pipe temperature sensor and the indoor fan motor, and the indoor unit controller is used for:
after the air conditioner is shut down, receiving the temperature of the indoor unit coil pipe measured by the indoor unit coil pipe temperature sensor;
judging whether the anti-freezing protection condition is met according to the temperature of the coil pipe of the internal machine;
and when the anti-freezing protection condition is judged to be met, controlling the indoor fan motor to operate.
In the air conditioner provided in the first embodiment of the present invention, after the air conditioner is turned off, the indoor unit controller may determine whether the obtained temperature of the indoor unit coil meets the anti-freezing protection condition according to the obtained temperature of the indoor unit coil, and when it is determined that the obtained temperature meets the anti-freezing protection condition, control the indoor fan motor to operate, so that when a low temperature phenomenon of the evaporator occurs after the air conditioner is turned off, the indoor fan motor may enter an operating state to promote heat exchange between the evaporator and the indoor air, and a problem in the prior art that a large amount of ice is generated on the evaporator due to the fact that the compressor continues to operate but the indoor fan motor does not operate after the air conditioner is turned off may be effectively solved, thereby preventing the air conditioner from being damaged due to the large amount of ice on the evaporator, and improving durability and safety.
In a second embodiment of the present invention, the air conditioner is provided, wherein the anti-freeze protection conditions specifically are:
the temperature of the coil pipe of the inner machine is continuously smaller than a preset temperature threshold value within a first preset time.
In the air conditioner provided in the second embodiment of the present invention, because the temperature of the indoor unit coil is continuously smaller than the preset temperature threshold value within the first preset time as the anti-freezing protection condition, when the temperature of the indoor unit coil is higher, the indoor fan motor is not controlled to enter the operating state, so that energy consumption related to the air conditioner is reduced, and it is ensured that the indoor fan motor is controlled to enter the operating state only when the temperature of the indoor unit coil is too low for a period of time, thereby avoiding misjudgment caused by a measurement error of the indoor unit coil temperature sensor, and reducing unnecessary energy consumption.
The air conditioner provided in the third embodiment of the present invention, wherein the air conditioner further includes an indoor ambient temperature sensor; wherein the content of the first and second substances,
the indoor environment temperature sensor is used for measuring the temperature of the indoor environment;
the indoor unit controller is also connected with the indoor environment temperature sensor, and the indoor unit controller is also used for:
receiving the indoor environment temperature measured by the indoor environment temperature sensor;
then, the anti-freezing protection conditions are specifically as follows: the indoor environment temperature is continuously greater than the sum of the temperature of the coil pipe of the indoor unit and a preset temperature difference threshold value within a second preset time; wherein the preset temperature difference threshold is a positive number.
In the air conditioner provided in the third embodiment of the present invention, since the sum of the indoor environment temperature continuously greater than the indoor unit coil temperature and the preset temperature difference threshold value within the second preset time is selected as the anti-freezing protection condition, when the temperature difference between the indoor environment temperature and the indoor unit coil temperature is small, the indoor fan motor is not controlled to enter the running state, so that the energy consumption related to the air conditioner is reduced, and it is ensured that the indoor fan motor is controlled to enter the running state only when the indoor unit coil temperature is greatly lower than the indoor environment temperature for a period of time, thereby avoiding the erroneous judgment caused by the occurrence of the measurement error of the indoor unit coil temperature sensor, and reducing the unnecessary energy consumption.
An air conditioner provided in a fourth embodiment of the present invention, wherein the air conditioner further includes a display; wherein the content of the first and second substances,
and the display is used for responding to the fault display signal and displaying fault information.
The inner machine controller is also connected with the display, and the inner machine controller is also used for:
and when the anti-freezing protection condition is judged to be met, generating the fault display signal and sending the fault display signal to the display.
In the air conditioner provided in the fourth embodiment of the present invention, since the display is controlled to display the fault information when it is determined that the anti-freeze protection condition is satisfied, the user can be timely reminded to check the current state of the air conditioner when the evaporator is at a low temperature after the air conditioner is turned off.
The air conditioner provided in a fifth embodiment of the present invention, wherein the air conditioner further comprises a buzzer; wherein the content of the first and second substances,
the buzzer is used for responding to the fault early warning signal and sending out a buzzing alarm;
the inner machine controller is also connected with the buzzer, and the inner machine controller is also used for:
and when the anti-freezing protection condition is judged to be met, generating the fault early warning signal and sending the fault early warning signal to the buzzer.
In the air conditioner provided in the fifth embodiment of the present invention, since the buzzer is controlled to issue the buzzer alarm when it is determined that the anti-freeze protection condition is satisfied, the user can be timely reminded to check the current state of the air conditioner when the evaporator is at a low temperature after the air conditioner is turned off.
An air conditioner protection method provided in a sixth embodiment of the present invention is applied to the air conditioner described in any one of the above, and includes:
after the air conditioner is shut down, receiving the temperature of the indoor unit coil pipe measured by the indoor unit coil pipe temperature sensor;
judging whether the anti-freezing protection condition is met according to the temperature of the coil pipe of the internal machine;
and when the anti-freezing protection condition is judged to be met, controlling the indoor fan motor to operate.
In the air conditioner protection method provided in the sixth embodiment of the present invention, after the air conditioner is turned off, it is determined whether the obtained temperature of the coil of the internal unit meets the anti-freezing protection condition, and when it is determined that the obtained temperature meets the anti-freezing protection condition, the indoor fan motor is controlled to operate, so that when the evaporator has a low temperature after the air conditioner is turned off, the indoor fan motor enters an operating state to promote heat exchange between the evaporator and the indoor air, and a problem in the prior art that the evaporator is frozen in a large amount due to the fact that the compressor continues to operate but the indoor fan motor does not operate after the air conditioner is turned off can be effectively solved, thereby preventing the air conditioner from being damaged due to the freezing of the evaporator in a large amount, and improving durability and safety of the air conditioner.
In an air conditioner protection method provided in a seventh embodiment of the present invention, the anti-freeze protection conditions are specifically:
the temperature of the coil pipe of the inner machine is continuously smaller than a preset temperature threshold value within a first preset time.
In the air conditioner protection method provided in the seventh embodiment of the present invention, because the temperature of the indoor unit coil is continuously smaller than the preset temperature threshold value within the first preset time as the anti-freeze protection condition, when the temperature of the indoor unit coil is higher, the indoor fan motor is not controlled to enter the running state, so that the energy consumption related to the air conditioner is reduced, and it is ensured that the indoor fan motor is controlled to enter the running state only when the temperature of the indoor unit coil is too low for a period of time, thereby avoiding the erroneous judgment caused by the measurement error of the indoor unit coil temperature sensor, and reducing the unnecessary energy consumption.
An eighth embodiment of the present invention provides an air conditioner protection method, wherein when the air conditioner includes an indoor ambient temperature sensor, the air conditioner protection method further includes:
receiving the indoor environment temperature measured by the indoor environment temperature sensor;
then, the anti-freezing protection conditions are specifically as follows: the indoor environment temperature is continuously greater than the sum of the temperature of the coil pipe of the indoor unit and a preset temperature difference threshold value within a second preset time; wherein the preset temperature difference threshold is a positive number.
In the air conditioner protection method provided in the eighth embodiment of the present invention, since the sum of the indoor environment temperature continuously greater than the indoor unit coil temperature and the preset temperature difference threshold value within the second preset time is selected as the anti-freeze protection condition, when the temperature difference between the indoor environment temperature and the indoor unit coil temperature is small, the indoor fan motor is not controlled to enter the running state, so that the energy consumption related to the air conditioner is reduced, and it is ensured that the indoor fan motor is controlled to enter the running state only when the indoor unit coil temperature is greatly lower than the indoor environment temperature for a period of time, thereby avoiding the erroneous judgment caused by the measurement error of the indoor unit coil temperature sensor, and reducing the unnecessary energy consumption.
The air conditioner protection method provided in a ninth embodiment of the present invention, wherein when the air conditioner includes a display, the air conditioner protection method further includes:
and when the anti-freezing protection condition is judged to be met, generating the fault display signal and sending the fault display signal to the display, so that the display displays fault information.
In the air conditioner protection method provided in the ninth embodiment of the present invention, since the display is controlled to display the fault information when the air conditioner includes the display and meets the anti-freeze protection condition, the user can be timely reminded to check the current state of the air conditioner when the evaporator is at a low temperature after the air conditioner is turned off.
An air conditioner protection method provided in a tenth embodiment of the present invention, wherein when the air conditioner includes a buzzer, the air conditioner protection method further includes:
and when the anti-freezing protection condition is met, generating the fault early warning signal and sending the fault early warning signal to the buzzer, so that the buzzer sends out a buzzing alarm.
In the air conditioner protection method provided in the tenth embodiment of the present invention, since the buzzer is controlled to issue the buzzer alarm when the air conditioner includes the buzzer and the anti-freezing protection condition is satisfied, the user can be timely reminded to check the current state of the air conditioner when the evaporator is at a low temperature after the air conditioner is turned off.
Drawings
Fig. 1 is a perspective view of an air conditioner according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention.
Fig. 3 is a sectional view of the indoor unit in which the horizontal baffle is positioned at a position where the wind direction of the ceiling airflow is selected.
Fig. 4 is a flowchart illustrating an air conditioner protection method according to an embodiment of the present invention.
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.
The air conditioner in the present application 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 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.
The overall perspective view of the air conditioner in the present application is shown in fig. 1. The air conditioner 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.
The air conditioner 1 includes a refrigerant circuit, is connected to the indoor unit 3 and the outdoor unit 2 by a connection pipe 4 to form a refrigerant circuit through which a refrigerant circulates, and is capable of executing a vapor compression refrigeration cycle by circulating the refrigerant in the refrigerant circuit.
The remote controller 5 includes a liquid crystal display device 5a and buttons 5b shown in fig. 1. The user can operate these switches using the corresponding buttons 5b such as the operation switch, the temperature setting switch, the wind direction setting switch, and the air volume setting switch. The operation switch is a switch for switching between operation and stop of the air conditioner 1, and is alternately switched between operation and stop each time the operation switch is operated. The temperature setting switch is a switch for inputting a room temperature desired by a user. The wind direction setting switch is a switch for setting a wind direction. The air volume setting switch is a switch for inputting air volume.
Fig. 2 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention.
An air conditioner 1 provided in an embodiment of the present invention includes:
an indoor fan motor 31 for generating an air flow of indoor air passing through the evaporator to promote heat exchange with the indoor air when in operation;
an inner machine coil temperature sensor 32 for measuring the temperature of the inner machine coil;
an internal unit controller 33, wherein the internal unit controller 33 is connected with the internal unit coil temperature sensor 32 to receive a signal related to the temperature measured by the internal unit coil temperature sensor 32; the indoor unit controller 33 is also connected to the indoor fan motor 31, and is capable of controlling the operation of the indoor fan motor 31. The indoor unit controller 33 includes, for example, a CPU and a memory, and is configured to be able to control the indoor unit 3 in accordance with a program or the like stored in the memory.
As can be understood, the air conditioner 1 includes an outdoor unit 2 and an indoor unit 3. The indoor fan motor 31, the indoor unit coil temperature sensor 32, and the indoor unit controller 33 are components of the indoor unit 3, and the ac contactor 21, the compressor 22, and the ac fan motor 23 are components of the outdoor unit 2.
As shown in fig. 2, the indoor unit 3 further includes a first relay 34 for controlling the ac contactor 21, and a second relay 35 for controlling the ac fan motor 23. Because under the normal condition, after the air conditioner 1 is shut down, the indoor fan motor 31 will stop running, the contact of the first relay 34, the contact of the ac contactor 21 and the contact of the second relay 35 will also be disconnected, therefore, the compressor 22 and the ac fan motor 23 will also stop running, the four-way valve coil is powered off, and under the abnormal condition, because the contact of the first relay 34 of the ac contactor 21 is controlled to be adhered to or the contact of the ac contactor 21 of the outdoor unit 2 is adhered to be failed, after the air conditioner is shut down, the compressor 22 will always keep running, but because the indoor fan motor 31 has stopped running at this time, under the effect of the refrigerant on the coil, the temperature of the coil of the indoor unit will continuously drop. By utilizing the principle and the characteristic that the indoor unit controller 33 always works after being shut down, after the air conditioner 1 is shut down, the temperature of the indoor unit coil is continuously acquired through the indoor unit coil temperature sensor 32, the indoor unit controller 33 judges whether the anti-freezing protection condition is met according to the received temperature of the indoor unit coil measured by the indoor unit coil temperature sensor 32, and controls the indoor fan motor 31 to operate when the anti-freezing protection condition is judged to be met, so that the heat exchange between the evaporator and the environment is promoted, and the phenomenon that the evaporator is too low in temperature to cause condensation and icing is avoided. The anti-freeze protection condition refers to a condition that needs to be satisfied to control the operation of the indoor fan motor 31 so as to prevent the evaporator from freezing, and the anti-freeze protection condition includes various conditions, for example, the temperature of the indoor unit coil is lower than a certain threshold value, or the temperature of the indoor unit coil is lower than the indoor environment temperature, and the like, which is not limited herein.
In the air conditioner provided by the embodiment of the invention, the indoor unit controller can judge whether the anti-freezing protection condition is met according to the acquired temperature of the coil pipe of the indoor unit after the air conditioner is shut down, and control the indoor fan motor to operate when the anti-freezing protection condition is met, so that the indoor fan motor enters an operating state to promote the heat exchange between the evaporator and the indoor air when the evaporator low-temperature phenomenon occurs after the air conditioner is shut down, and the problem that the evaporator is greatly frozen due to the fact that the compressor continues to operate but the indoor fan motor does not operate after the air conditioner is shut down in the prior art can be effectively solved, so that the air conditioner is prevented from being damaged due to the fact that the evaporator is greatly frozen, and the durability and the safety of the air conditioner are improved.
The indoor unit 3 will be described in further detail below with reference to fig. 3 (the indoor unit coil temperature sensor 32 and the indoor unit controller 33 are not shown in fig. 3).
As shown in fig. 3, the evaporator 16 is composed of a plurality of fins 16a and a plurality of heat transfer pipes 16b penetrating the plurality of fins 16 a. The refrigerant flowing through the heat transfer pipe 16b exchanges heat with air passing through the evaporator 16. Although the evaporator 16 composed of the fin 16a and the heat transfer pipe 16b is described here, the evaporator 16 used in the present invention is not limited to a fin-and-tube type heat exchanger, and for example, a heat exchanger using a flat multi-hole tube instead of the heat transfer pipe 16b may be employed.
The indoor fan motor 31 is located at a substantially central portion inside the casing 61. The indoor fan motor 31 is a cross-flow fan having a substantially cylindrical shape elongated in the longitudinal direction (left-right direction) of the indoor unit 3. By rotationally driving the indoor fan motor 31, the conditioned air generated by the air filter 62 through which the indoor air is sucked from the suction port 71 and then the evaporator 16 is blown out into the room from the blow-out port 72. The indoor fan motor 31 rotates in accordance with the rotation speed of the indoor fan motor, and the larger the rotation speed, the larger the volume of conditioned air blown out from the air outlet 72.
The indoor unit 3 includes, in addition to the evaporator 16 and the indoor fan motor 31, a casing 61, an air filter 62, and a plurality of vertical and horizontal flaps 63, 64, 65 for controlling air flow.
The housing 61 has a box shape extending in a longitudinal direction (hereinafter, also referred to as a left-right direction) and having a plurality of openings. A suction port 71 is provided in the top surface of the housing 61. The indoor air near the suction port 71 is taken into the casing 61 through the suction port 71 by driving the indoor fan motor 31. The indoor air taken in from the intake port 71 passes through the air filter 62 provided on the top surface of the casing 61, and is further sent to the indoor fan motor 31 through the evaporator 16.
An air outlet 72 is formed in the bottom surface of the casing 61. The outlet 72 is connected to the inside of the casing 61 through a scroll flow path 72b continuous from the indoor fan motor 31. The indoor air sucked in from the suction port 71 is heat-exchanged by the evaporator 16, and then blown out from the blow-out port 72 to the room RS through the scroll passage 72 b. A flow passage lower surface 72a is provided on the rear side of the scroll flow passage 72 b. The cross-sectional shape of the flow path lower surface 72a describes a curve that moves away from the rotation center of the indoor fan motor 31 as it rotates.
The air outlet 72 is provided with two horizontal flaps 64 and 65 extending long in the left-right direction. These horizontal baffles 64, 65 are rotatably mounted on the housing 61. The horizontal flaps 64 and 65 are configured to be independently rotatable about respective rotation centers extending in the left-right direction by a horizontal flap driving motor provided for each horizontal flap. These horizontal flap drive motors are controlled by an indoor unit controller 33 provided in the indoor unit 3. These horizontal flaps 64 and 65 adjust the vertical direction of the air blown out from the air outlet 72, either individually or in cooperation with each other.
A plurality of vertical baffles 63 having planes intersecting the left-right direction are provided in the depth of the air outlet 72. The vertical flapper 63 can be rotated left and right about a rotation center extending in the up-down direction (direction intersecting the left-right direction) by the vertical flapper driving motor. The vertical shutter driving motor that drives the vertical shutter 63 is also controlled by the internal machine controller 33. These vertical baffles 63 adjust the direction of the air blown out from the air outlet 72 to the left and right.
In some embodiments, since the inner unit coil is prone to icing when the temperature is below a certain threshold, the anti-freeze protection condition may be specifically set as: the temperature of the coil pipe of the inner machine is continuously smaller than a preset temperature threshold value within a first preset time. The first preset time and the preset temperature threshold may be set according to an actual application environment, and are not limited herein, for example, the first preset time may be set to 5min, and the preset temperature threshold may be set to 0 ℃.
In this embodiment, because it is the protection condition that prevents frostbite to select interior machine coil pipe temperature to be less than the predetermined temperature threshold value continuously in first predetermined time, consequently, when interior machine coil pipe temperature is higher, do not control indoor fan motor and get into running state to reduce the energy consumption relevant with the air conditioner, and, guaranteed that only when interior machine coil pipe temperature crosses low when lasting a period, just can control indoor fan motor and get into running state, avoided appearing the erroneous judgement that measuring error caused because of interior machine coil pipe temperature sensor, thereby reduce unnecessary energy consumption.
In some embodiments, as shown in fig. 2, the air conditioner 1 further includes an indoor ambient temperature sensor 36 for measuring the temperature of the indoor environment. The internal machine controller 33 is further connected to the indoor environment temperature sensor 36 to receive the indoor environment temperature measured by the indoor environment temperature sensor 36. Because under normal condition, after air conditioner 1 shuts down, compressor 22 can the out-of-service, at this moment, interior machine coil temperature Tc and indoor ambient temperature Tp should reach the equilibrium very fast, also be equal to Tc promptly, and under abnormal condition, because of control ac contactor 21's first relay 34 contact adhesion or outdoor unit 2's ac contactor 21 contact adhesion became invalid, after air conditioner 1 shut down, compressor 22 will be unable to cut off the power supply, can keep the running state always, but because indoor fan motor 31 has stopped the operation this moment, and the refrigerant can be to the coil effect, consequently, interior machine coil temperature Tc and indoor ambient temperature Tp will be unable to reach the equilibrium, promptly Tp is equal to Tc. According to the principle, the anti-freezing protection condition can be specifically set as follows: the indoor environment temperature is continuously greater than the sum of the temperature of the coil of the indoor unit and a preset temperature difference threshold value Ty within a second preset time, namely Tp-Tc is greater than Ty; the preset temperature difference threshold is a positive number, which may be set according to an actual application environment, and is not limited herein, for example, may be set to 10 ℃, and then the anti-freezing protection condition is that the temperature of the coil of the internal machine is less than the temperature of the indoor environment by 10 ℃; the second preset time may also be set according to actual conditions, and is not limited herein, for example, may be set to 5 min.
In this embodiment, because the indoor environment temperature is selected to be continuously greater than the sum of the indoor unit coil temperature and the preset temperature difference threshold value within the second preset time as the anti-freezing protection condition, when the temperature difference between the indoor environment temperature and the indoor unit coil temperature is small, the indoor fan motor is not controlled to enter the running state, so that the energy consumption related to the air conditioner is reduced, and only when the indoor unit coil temperature is lower than the indoor environment temperature for a period of time to a large extent, the indoor fan motor is controlled to enter the running state, the misjudgment caused by the occurrence of the measurement error of the indoor unit coil temperature sensor is avoided, and the unnecessary energy consumption is reduced.
In some embodiments, referring to fig. 2, the air conditioner 1 further comprises a display 37. Wherein, indoor unit controller 33 still with display 37 is connected, indoor unit controller 33 is judging to satisfy during the protection condition prevents frostbite, except control indoor fan motor 31 operation, still generates trouble display signal and sends to display 37, display 37 responds to trouble display signal, shows trouble information, consequently, when the evaporimeter low temperature phenomenon appears after the air conditioner shuts down, can in time remind the user to look over the current state of air conditioner.
In some embodiments, referring to fig. 2, the air conditioner 1 further comprises a buzzer 38. The internal machine controller 33 is further connected with the buzzer 38, the internal machine controller 33 generates the fault early warning signal and sends the fault early warning signal to the buzzer 38 when judging that the anti-freezing protection condition is met, and the buzzer 38 sends out a buzzing alarm in response to the fault early warning signal, so that a user can be timely reminded to check the current state of the air conditioner when the low-temperature phenomenon of the evaporator occurs after the air conditioner is shut down.
Fig. 4 is a schematic flow chart of an air conditioner protection method according to an embodiment of the present invention.
The air conditioner protection method provided by the embodiment of the invention is applied to the air conditioner in any one of the embodiments, and comprises the following steps:
s41, the indoor unit controller receives the temperature of the indoor unit coil pipe measured by the indoor unit coil pipe temperature sensor after the air conditioner is shut down;
s42, judging whether the anti-freezing protection condition is met or not by the internal machine controller according to the temperature of the internal machine coil;
and S43, controlling the indoor fan motor to operate when the indoor machine controller judges that the anti-freezing protection condition is met.
In the air conditioner protection method provided by the embodiment of the invention, after the air conditioner is shut down, whether the anti-freezing protection condition is met or not is judged according to the acquired temperature of the coil pipe of the internal machine, and when the anti-freezing protection condition is met, the indoor fan motor is controlled to operate, so that when the low-temperature phenomenon of the evaporator occurs after the air conditioner is shut down, the indoor fan motor enters an operating state to promote the heat exchange between the evaporator and the indoor air, and the problem that the evaporator is greatly frozen due to the fact that the compressor continues to operate but the indoor fan motor does not operate after the air conditioner is shut down in the prior art can be effectively solved, so that the air conditioner is prevented from being damaged due to the fact that the evaporator is greatly frozen, and the durability and the safety of the air conditioner are improved.
In some embodiments, since the inner unit coil is prone to icing when the temperature is below a certain threshold, the anti-freeze protection condition may be specifically set as: the temperature of the coil pipe of the inner machine is continuously smaller than a preset temperature threshold value within a first preset time. The first preset time and the preset temperature threshold may be set according to an actual application environment, and are not limited herein, for example, the first preset time may be set to 5min, and the preset temperature threshold may be set to 0 ℃.
In this embodiment, because it is the protection condition that prevents frostbite to select interior machine coil pipe temperature to be less than the predetermined temperature threshold value continuously in first predetermined time, consequently, when interior machine coil pipe temperature is higher, do not control indoor fan motor and get into running state to reduce the energy consumption relevant with the air conditioner, and, guaranteed that only when interior machine coil pipe temperature crosses low when lasting a period, just can control indoor fan motor and get into running state, avoided appearing the erroneous judgement that measuring error caused because of interior machine coil pipe temperature sensor, thereby reduce unnecessary energy consumption.
In some embodiments, when the air conditioner further includes an indoor environment temperature sensor for measuring a temperature of an indoor environment, the air conditioner protection method further includes:
s51, receiving the indoor environment temperature measured by the indoor environment temperature sensor;
then, the anti-freezing protection conditions are specifically as follows: the indoor environment temperature is continuously greater than the sum of the temperature of the coil pipe of the indoor unit and a preset temperature difference threshold value within a second preset time; wherein the preset temperature difference threshold is a positive number.
In this embodiment, because the indoor environment temperature is selected to be continuously greater than the sum of the indoor unit coil temperature and the preset temperature difference threshold value within the second preset time as the anti-freezing protection condition, when the temperature difference between the indoor environment temperature and the indoor unit coil temperature is small, the indoor fan motor is not controlled to enter the running state, so that the energy consumption related to the air conditioner is reduced, and only when the indoor unit coil temperature is lower than the indoor environment temperature for a period of time to a large extent, the indoor fan motor is controlled to enter the running state, the misjudgment caused by the occurrence of the measurement error of the indoor unit coil temperature sensor is avoided, and the unnecessary energy consumption is reduced.
In some embodiments, when the air conditioner includes a display, the air conditioner protection method further includes:
and S52, when the anti-freezing protection condition is judged to be met, generating the fault display signal and sending the fault display signal to the display, so that the display displays fault information.
In the embodiment, because the air conditioner comprises the display and the display is controlled to display the fault information when the anti-freezing protection condition is met, when the low-temperature phenomenon of the evaporator occurs after the air conditioner is turned off, a user can be timely reminded to check the current state of the air conditioner.
In some embodiments, when the air conditioner includes a buzzer, the air conditioner protection method further includes:
and S53, when the anti-freezing protection condition is judged to be met, generating the fault early warning signal and sending the fault early warning signal to the buzzer, so that the buzzer sends out a buzzing alarm.
In the embodiment, because the air conditioner comprises the buzzer and the buzzer is controlled to give out the buzzing alarm when the anti-freezing protection condition is met, when the evaporator is in a low-temperature state after the air conditioner is turned off, a user can be timely reminded to check the current state of the air conditioner.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. An air conditioner, characterized in that the air conditioner comprises:
the inner machine coil temperature sensor is used for measuring the temperature of the inner machine coil;
an indoor fan motor for generating an air flow of indoor air through the evaporator to promote heat exchange with the indoor air when in operation;
the indoor unit controller is respectively connected with the indoor unit coil pipe temperature sensor and the indoor fan motor, and the indoor unit controller is used for:
after the air conditioner is shut down, receiving the temperature of the indoor unit coil pipe measured by the indoor unit coil pipe temperature sensor;
judging whether the anti-freezing protection condition is met according to the temperature of the coil pipe of the internal machine;
and when the anti-freezing protection condition is judged to be met, controlling the indoor fan motor to operate.
2. The air conditioner according to claim 1, wherein the freeze protection conditions are specifically:
the temperature of the coil pipe of the inner machine is continuously smaller than a preset temperature threshold value within a first preset time.
3. The air conditioner according to claim 1, further comprising an indoor ambient temperature sensor; wherein the content of the first and second substances,
the indoor environment temperature sensor is used for measuring the temperature of the indoor environment;
the indoor unit controller is also connected with the indoor environment temperature sensor, and the indoor unit controller is also used for:
receiving the indoor environment temperature measured by the indoor environment temperature sensor;
then, the anti-freezing protection conditions are specifically as follows: the indoor environment temperature is continuously greater than the sum of the temperature of the coil pipe of the indoor unit and a preset temperature difference threshold value within a second preset time; wherein the preset temperature difference threshold is a positive number.
4. The air conditioner of claim 1, further comprising a display; wherein the content of the first and second substances,
the display is used for responding to the fault display signal and displaying fault information;
the inner machine controller is also connected with the display, and the inner machine controller is also used for:
and when the anti-freezing protection condition is judged to be met, generating the fault display signal and sending the fault display signal to the display.
5. The air conditioner according to claim 1, further comprising a buzzer; wherein the content of the first and second substances,
the buzzer is used for responding to the fault early warning signal and sending out a buzzing alarm;
the inner machine controller is also connected with the buzzer, and the inner machine controller is also used for:
and when the anti-freezing protection condition is judged to be met, generating the fault early warning signal and sending the fault early warning signal to the buzzer.
6. An air conditioner protection method applied to the air conditioner according to any one of claims 1 to 5, comprising:
after the air conditioner is shut down, receiving the temperature of the indoor unit coil pipe measured by the indoor unit coil pipe temperature sensor;
judging whether the anti-freezing protection condition is met according to the temperature of the coil pipe of the internal machine;
and when the anti-freezing protection condition is judged to be met, controlling the indoor fan motor to operate.
7. The air conditioner protection method as claimed in claim 6, wherein the anti-freeze protection conditions are specifically:
the temperature of the coil pipe of the inner machine is continuously smaller than a preset temperature threshold value within a first preset time.
8. The air conditioner protection method as claimed in claim 6, wherein when the air conditioner includes an indoor ambient temperature sensor, the air conditioner protection method further comprises:
receiving the indoor environment temperature measured by the indoor environment temperature sensor;
then, the anti-freezing protection conditions are specifically as follows: the indoor environment temperature is continuously greater than the sum of the temperature of the coil pipe of the indoor unit and a preset temperature difference threshold value within a second preset time; wherein the preset temperature difference threshold is a positive number.
9. The air conditioner protection method as claimed in claim 6, wherein when the air conditioner includes a display, the air conditioner protection method further comprises:
and when the anti-freezing protection condition is judged to be met, generating the fault display signal and sending the fault display signal to the display, so that the display displays fault information.
10. The air conditioner protection method as claimed in claim 6, wherein when the air conditioner includes a buzzer, the air conditioner protection method further comprises:
and when the anti-freezing protection condition is met, generating the fault early warning signal and sending the fault early warning signal to the buzzer, so that the buzzer sends out a buzzing alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010350698.5A CN111623483A (en) | 2020-04-28 | 2020-04-28 | Air conditioner and protection method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010350698.5A CN111623483A (en) | 2020-04-28 | 2020-04-28 | Air conditioner and protection method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111623483A true CN111623483A (en) | 2020-09-04 |
Family
ID=72257978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010350698.5A Pending CN111623483A (en) | 2020-04-28 | 2020-04-28 | Air conditioner and protection method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111623483A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06137647A (en) * | 1992-10-26 | 1994-05-20 | Daikin Ind Ltd | Condensation preventing controller for indoor air-conditioning machine |
| KR20050019330A (en) * | 2003-08-18 | 2005-03-03 | 삼성전자주식회사 | Air conditioner |
| CN1888672A (en) * | 2005-06-30 | 2007-01-03 | 乐金电子(天津)电器有限公司 | Air conditioner indoor heat exchanger freezing preventing controlling method |
| CN102486523A (en) * | 2010-12-02 | 2012-06-06 | 乐金电子(天津)电器有限公司 | Method for hardware detection in power-off state of air conditioner |
| CN104633836A (en) * | 2013-11-14 | 2015-05-20 | 珠海格力电器股份有限公司 | Defrosting control method for air conditioner |
| CN105627524A (en) * | 2016-03-14 | 2016-06-01 | 广东美的制冷设备有限公司 | Air conditioner anti-freezing control method and air conditioner |
| CN106403192A (en) * | 2016-10-09 | 2017-02-15 | 珠海格力电器股份有限公司 | Anti-condensation operating control method and device and multi-split air-conditioning system |
| CN107894062A (en) * | 2017-11-10 | 2018-04-10 | 广东美的制冷设备有限公司 | The control method and mobile air conditioner of mobile air conditioner |
| CN109539456A (en) * | 2017-09-21 | 2019-03-29 | 奥克斯空调股份有限公司 | A kind of guard method of air conditioner room unit and device |
| CN109579231A (en) * | 2018-11-20 | 2019-04-05 | 宁波奥克斯电气股份有限公司 | A kind of drip tray fault detection and control method and device |
| CN111043707A (en) * | 2019-12-31 | 2020-04-21 | 海信（山东）空调有限公司 | Compressor reverse rotation detection method and air conditioner |
-
2020
- 2020-04-28 CN CN202010350698.5A patent/CN111623483A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06137647A (en) * | 1992-10-26 | 1994-05-20 | Daikin Ind Ltd | Condensation preventing controller for indoor air-conditioning machine |
| KR20050019330A (en) * | 2003-08-18 | 2005-03-03 | 삼성전자주식회사 | Air conditioner |
| CN1888672A (en) * | 2005-06-30 | 2007-01-03 | 乐金电子(天津)电器有限公司 | Air conditioner indoor heat exchanger freezing preventing controlling method |
| CN102486523A (en) * | 2010-12-02 | 2012-06-06 | 乐金电子(天津)电器有限公司 | Method for hardware detection in power-off state of air conditioner |
| CN104633836A (en) * | 2013-11-14 | 2015-05-20 | 珠海格力电器股份有限公司 | Defrosting control method for air conditioner |
| CN105627524A (en) * | 2016-03-14 | 2016-06-01 | 广东美的制冷设备有限公司 | Air conditioner anti-freezing control method and air conditioner |
| CN106403192A (en) * | 2016-10-09 | 2017-02-15 | 珠海格力电器股份有限公司 | Anti-condensation operating control method and device and multi-split air-conditioning system |
| CN109539456A (en) * | 2017-09-21 | 2019-03-29 | 奥克斯空调股份有限公司 | A kind of guard method of air conditioner room unit and device |
| CN107894062A (en) * | 2017-11-10 | 2018-04-10 | 广东美的制冷设备有限公司 | The control method and mobile air conditioner of mobile air conditioner |
| CN109579231A (en) * | 2018-11-20 | 2019-04-05 | 宁波奥克斯电气股份有限公司 | A kind of drip tray fault detection and control method and device |
| CN111043707A (en) * | 2019-12-31 | 2020-04-21 | 海信（山东）空调有限公司 | Compressor reverse rotation detection method and air conditioner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| ES2783299T3 (en) | Indoor air conditioning unit | |
| US20160238271A1 (en) | Air conditioner | |
| KR101916424B1 (en) | Air conditioner and method for controlling the same | |
| CN111780362B (en) | Air conditioner and control method thereof | |
| CN111720969A (en) | Air conditioner and control method thereof | |
| CN112682883A (en) | Air conditioner and air conditioner constant air volume static pressure self-adaptive control method | |
| JP2017156003A (en) | Air conditioner | |
| JP5171759B2 (en) | Air conditioner | |
| JP2019066050A (en) | Refrigerating device | |
| CN113137715A (en) | Control method for compressor frequency of multi-split air conditioner and multi-split air conditioner | |
| JP7420562B2 (en) | Air conditioners and servers | |
| JP4986443B2 (en) | Air conditioner | |
| JP6612652B2 (en) | Air conditioner | |
| CN111623483A (en) | Air conditioner and protection method thereof | |
| JP2009287811A (en) | Air conditioner | |
| JP2001004254A (en) | Refrigeration system | |
| JP2020091080A (en) | Refrigeration cycle device | |
| CN111780361B (en) | Air conditioner | |
| JP5233556B2 (en) | Air conditioner | |
| JPH0626689A (en) | Multiple type air conditioner | |
| CN111750502B (en) | Air conditioner and control method | |
| CN217482868U (en) | Air conditioner | |
| CN114923218B (en) | Air conditioner | |
| CN213480421U (en) | Outdoor unit of air conditioner | |
| JP7219266B2 (en) | air conditioning system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200904 |