CN114893878A - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
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- CN114893878A CN114893878A CN202210748944.1A CN202210748944A CN114893878A CN 114893878 A CN114893878 A CN 114893878A CN 202210748944 A CN202210748944 A CN 202210748944A CN 114893878 A CN114893878 A CN 114893878A
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/48—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring prior to normal operation, e.g. pre-heating or pre-cooling
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Thermal Sciences (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner and a control method thereof, wherein the air conditioner comprises: refrigerating system, outdoor ambient temperature sensor, electric heating element, relay and controller, relay are established ties to electric heating element, and when the relay was closed, electric heating element started, heated the bottom of compressor, and the controller is configured as: determining that the air conditioner is powered on; controlling the relay to be switched on or off according to the outdoor environment temperature, and when the relay is switched on, starting the electric heating assembly to heat the bottom of the compressor; and when the relay is disconnected, the electric heating assembly is not started, the bottom of the compressor is not heated, the refrigerating machine oil in the compressor is ensured to be within a proper temperature range, the compressor is ensured to be normally started and operated after receiving a compressor starting instruction under a low-temperature condition, and meanwhile, the problem of oil blockage is prevented, namely, the normal starting and operation of the air conditioner under the low-temperature condition are ensured.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a control method thereof.
Background
Currently, R290 (Propane) refrigerant is widely used as a new type of environmentally friendly refrigerant in small refrigeration equipment such as home air conditioners. Since R290 is a flammable refrigerant and there is a strict limit on the amount of charge in the product application due to safety considerations, the operating pressure of the refrigeration system using R290 refrigerant is low, especially when heating at low temperature.
The refrigerating machine oil in the compressor used by the air conditioner plays a vital role in the operation of a refrigerating system, and the refrigerating machine oil lubricates, seals and cools the cylinder and the rotor of the compressor, so how to ensure the efficient and safe operation of the compressor is more important for an R290 refrigerant. Most of refrigerating machine oil used by the existing compressor is common mineral refrigerating machine oil, and the viscosity of the refrigerating machine oil can be increased sharply under the low-temperature condition.
In an air conditioner product using the R290 refrigerant, when the air conditioner is started at low temperature for heating, low-temperature refrigerator oil in a pipeline and the R290 refrigerant are easy to form floccule, and the floccule is easy to accumulate in a valve when passing through an electronic expansion valve at low temperature, so that the blockage (commonly called as oil blockage) of a refrigeration system is caused, the starting difficulty is caused, and the complete machine of the air conditioner is seriously caused. Therefore, how to effectively prevent the throttling device from being blocked and ensure that the refrigerating machine oil in the compressor is at the optimal temperature when the compressor is started to operate under the low-temperature condition, and the good lubricating performance is one of the problems of ensuring the normal operation of the air conditioner.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention aims to provide an air conditioner and a control method thereof.
The invention provides an air conditioner, comprising: the refrigeration system is used for exchanging the positions of a suction pipe and an exhaust pipe in the refrigeration cycle system so as to heat indoor air by using an evaporator to realize the heating operation of the air conditioner, and comprises a compressor which 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 a condenser; an outdoor environment temperature sensor for detecting an outdoor environment temperature; the electric heating assembly is used for heating the bottom of the compressor; a relay in series with the electrical heating assembly; the controller is configured to: determining that the air conditioner is powered on; controlling the relay to be switched on or off according to the outdoor environment temperature, and when the relay is in the closed state, starting the electric heating assembly to heat the bottom of the compressor; and when the relay is in the off state, the electric heating assembly is not started, and the bottom of the compressor is not heated.
In addition, the air conditioner according to the embodiment of the invention may further have the following additional technical features:
further, the controller is configured to: and judging whether the outdoor environment temperature does not exceed a first preset temperature, if so, controlling the relay to be closed so as to start the electric heating assembly, otherwise, controlling the relay to be disconnected so as to make the electric heating assembly not start.
Further, the controller is configured to: determining that a compressor starting instruction is received; controlling the compressor to start; judging whether the relay is in the closed state or the open state, and if the relay is in the closed state, controlling the relay to be opened after first preset time; and if the relay is in the off state, controlling the relay to maintain the off state.
Further, the electrical heating assembly comprises at least one electrical heating strip, each of the electrical heating strips being connected in series with one of the relays, the control means being configured to: if outdoor ambient temperature exceeds second preset temperature but does not exceed first preset temperature, then control first preset quantity the relay is closed to make with the first preset quantity of relay series connection of first preset quantity the electric heating area starts, in order to right the bottom of compressor heats, wherein, second preset temperature is less than first preset temperature.
Further, if outdoor ambient temperature exceeds third preset temperature but does not exceed the second preset temperature, then control the second preset quantity the relays are closed, so that with the second preset quantity that the relays of the second preset quantity are connected in series the electric heating belt is started, in order to right the bottom of the compressor is heated, wherein, the third preset temperature is less than the second preset temperature, the first preset quantity is less than the second preset quantity.
According to the air conditioner disclosed by the embodiment of the invention, when the air conditioner is electrified, the compressor is not started, the relay is controlled according to the outdoor environment temperature, the electric heating assembly is started, the bottom of the compressor is continuously heated in a short time, so that the refrigerating machine oil in the compressor is ensured to be within a proper temperature range, the compressor can be normally started under the low-temperature condition, meanwhile, the oil blockage problem is prevented, namely, the normal starting and operation of the air conditioner under the low-temperature condition are ensured after the compressor starting instruction is received. Meanwhile, when the air conditioner is powered on, the number of the starting electric heating strips is adjusted according to the temperature of the outdoor environment, namely, the outdoor environment temperature is related to the number of the starting electric heating strips, so that the bottom of the compressor can be heated, and meanwhile, energy is saved.
In view of the above problems, the present invention further provides a method for controlling an air conditioner, including: determining that the air conditioner is powered on; controlling the relay to be switched on or off according to the outdoor environment temperature, and when the relay is in the closed state, starting the electric heating assembly to heat the bottom of the compressor; and when the relay is in the off state, the electric heating assembly is not started, and the bottom of the compressor is not heated.
In addition, the control method of the air conditioner according to the embodiment of the present invention may further have the following additional technical features:
further, the relay is controlled to be closed or opened according to the outdoor environment temperature, and the method comprises the following steps: and judging whether the outdoor environment temperature does not exceed a first preset temperature, if so, controlling the relay to be closed so as to start the electric heating assembly, otherwise, controlling the relay to be disconnected so as to make the electric heating assembly not start.
Further, the control method of the air conditioner further comprises the following steps: determining that a compressor starting instruction is received; controlling the compressor to start; judging whether the relay is in the closed state or the open state, and if the relay is in the closed state, controlling the relay to be opened after first preset time; and if the relay is in the off state, controlling the relay to maintain the off state.
Further, the electrical heating assembly comprises at least one electrical heating strip, each electrical heating strip being connected in series with one of the relays, the method further comprising: if outdoor ambient temperature exceeds second preset temperature but does not exceed first preset temperature, then control first preset quantity the relay is closed to make with the first preset quantity of relay series connection of first preset quantity the electric heating area starts, in order to right the bottom of compressor heats, wherein, second preset temperature is less than first preset temperature.
Further, the control method of the air conditioner further comprises the following steps: if outdoor ambient temperature exceeds third preset temperature but does not exceed the second preset temperature, then control the second preset quantity the relay is closed, so that with the second preset quantity that the relay of second preset quantity establishes ties the electric heating tape starts, in order to right the bottom of compressor heats, wherein, third preset temperature is less than the second preset temperature, first preset quantity is less than the second preset quantity. .
According to the control method of the air conditioner, when the air conditioner is powered on, the compressor is not started, the relay is controlled according to the outdoor environment temperature, the electric heating assembly is started, the bottom of the compressor is continuously heated in a short time, so that the refrigerating machine oil in the compressor is ensured to be within a proper temperature range, the compressor can be normally started under the low-temperature condition, meanwhile, the oil blockage problem is prevented, namely, the air conditioner is ensured to be normally started and operated under the low-temperature condition after the compressor starting instruction is received. Meanwhile, when the air conditioner is powered on, the number of the starting electric heating strips is adjusted according to the temperature of the outdoor environment, namely, the outdoor environment temperature is related to the number of the starting electric heating strips, so that the bottom of the compressor can be heated, and meanwhile, energy is saved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a flow chart for controlling the activation of an electrical heating assembly according to one embodiment of the present invention;
FIG. 3 is a flow chart for controlling the activation of an electrical heating assembly according to another embodiment of the present invention;
FIG. 4 is a flow chart for controlling the activation of at least one electrical heating strip according to one embodiment of the present invention;
fig. 5 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
In the description of the present invention, 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 of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
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 invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The air conditioner of the present invention 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 the heat is released to the ambient 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 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.
In the air conditioner of the present invention, during heating operation, high-temperature and high-pressure refrigerant discharged from a compressor flows into a condenser. In this case, the condenser functions as a radiator. Therefore, the refrigerant heats the indoor air by heat exchange with the indoor air as it flows through the condenser, and is cooled by heat dissipation itself. The low-temperature high-pressure refrigerant deprived of the temperature by the condenser is decompressed by the expansion valve and changes into a low-temperature low-pressure refrigerant. The refrigerant flowing into the evaporator through the expansion valve is heated by heat exchange with outdoor air. Then, the gas refrigerant, which is mainly low in temperature, is drawn from the evaporator into the compressor via the accumulator.
An air conditioner and a control method thereof according to an embodiment of the present invention will be described with reference to fig. 1 to 5.
Fig. 1 is a schematic structural view of an air conditioner according to an embodiment of the present invention. As shown in fig. 1, an air conditioner includes: refrigeration system 10, outdoor ambient temperature sensor 20, electrical heating assembly 30, controller 40, and relay 50. The refrigeration system 10 is used for exchanging the positions of the air suction pipes and the air exhaust pipes in the refrigeration cycle system so as to heat indoor air by using the evaporator to realize the heating operation of the air conditioner, and comprises a compressor, wherein 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 a condenser; the outdoor environment temperature sensor 20 is used for detecting the outdoor environment temperature; the electric heating assembly 30 is used for heating the bottom of the compressor; the relay 50 is connected in series with the electric heating assembly 30; the controller 40 is configured to: determining when the air conditioner is powered on; controlling the relay 50 to be closed or opened according to the outdoor environment temperature, and when the relay 50 is in a closed state, starting the electric heating assembly 30 to heat the bottom of the compressor; and when the relay 50 is in the off state, so that the electric heating assembly 30 is not activated, the bottom of the compressor is not heated.
Specifically, in the heat pump air conditioner using the flammable refrigerant (R290), when the air conditioner is powered on, the compressor is not started yet, and the relay 50 is controlled according to the outdoor ambient temperature to start the electric heating assembly 30, so that the bottom of the compressor is continuously heated in a short time, so that the compressor can be normally started under a low temperature condition after receiving a compressor starting instruction, and meanwhile, the oil blockage problem is prevented, that is, the normal start and operation of the air conditioner under the low temperature condition are ensured.
In a specific embodiment, the electric heating assembly 30 can automatically limit the temperature during heating, and automatically adjust the output power along with the temperature of the heated body without any additional equipment, the electric heating assembly 30 is a high-power electric heating device, the power of the electric heating assembly is 2-3 times that of a conventional electric heating assembly, the highest maintaining temperature can reach 250 ℃, the lowest operating temperature can be as low as minus 40 ℃, the working voltage is 220-600V, the withstand voltage is greater than 5KV, the electric heating assembly can be bent and wound at will, the length can be customized as required, and the electric heating assembly has good waterproof, moistureproof and insulating properties, is simple to install and convenient to operate, so that the refrigerating machine oil in the compressor is at the optimal temperature (generally the temperature is about 50 ℃) when the compressor is started and operated under a low-temperature condition, and has good lubricating properties.
In one embodiment of the present invention, as shown in fig. 2, the controller is configured to: when the air conditioner is powered on, whether the outdoor environment temperature does not exceed a first preset temperature or not is judged, if yes, the relay 50 is controlled to be closed, so that the electric heating assembly 30 is started, and if not, the relay 50 is controlled to be disconnected, so that the electric heating assembly 30 is not started.
Specifically, the electric heating element 30 mainly heats the casing of the compressor and the refrigerating machine oil accumulated at the bottom, so that when the air conditioner is powered on and the compressor is not started and the outdoor environment temperature does not exceed a first preset temperature, the control relay 50 is closed to start the electric heating element 30, so as to heat the refrigerating machine oil inside the compressor; when the air conditioner is powered on, before the compressor is not started, and the outdoor ambient temperature exceeds the first preset temperature, it is considered that the temperature of the refrigerating machine oil inside the compressor is already at the proper temperature, and the control relay 50 is turned off, so that the electric heating assembly 30 is not started.
In a specific embodiment, when the air conditioner is powered on and the outdoor environment temperature does not exceed a first preset temperature, for example, 10 ℃, the outdoor environment temperature is considered to be low, at this time, the relay 50 is controlled to be closed, current forms a loop through a main winding of the compressor, so that the electric heating assembly 30 heats the refrigerating machine oil at the shell and the bottom of the compressor, and meanwhile, the current forms a magnetic field through a motor winding of the compressor, so that an iron loss eddy current is formed inside the compressor to generate heat, so as to heat a motor, a cylinder body and a sliding vane of the compressor, thereby ensuring that the refrigerating machine oil inside the compressor is at an optimal temperature when the compressor is started and operated under a low temperature condition, having good lubricating performance, ensuring that the compressor has no resistance of the refrigerating machine oil before starting, namely preventing the oil blockage problem, and ensuring the normal starting and operation of the air conditioner under the low temperature condition.
In one embodiment of the present invention, as shown in fig. 3, the controller is configured to: determining that a compressor starting instruction is received; controlling the starting of the compressor; judging whether the relay is in a closed state or an open state, and if the relay is in the closed state, controlling the relay to be opened after first preset time; and if the relay is in the off state, controlling the relay to keep the off state.
Specifically, the first preset time is a preset threshold of the air conditioner, for example: 3 minutes, can be adjusted according to the specific parameters of the air conditioner. When a compressor starting instruction is received, the controller controls the compressor to start, and judges whether the relay is in a closed state or an open state, if the relay is in the closed state, the outdoor environment temperature is low, the electric heating assembly is in the starting state, and the bottom of the compressor is being heated. Because the compressor can produce heat in the working process, although the outdoor environment temperature is lower, the heat produced in the working process of the compressor is enough to keep the refrigerating machine oil in the compressor at a proper temperature, the electric heating assembly is not needed for heating, and the compressor can also keep normal operation, so that after the first preset time, the relay is controlled to be disconnected until the compressor stops operating. Therefore, the energy consumption of the air conditioner operation is further reduced while the normal operation of the compressor is ensured.
When a compressor starting instruction is received, the relay may be in an open state or a closed state due to different outdoor environment temperatures, and if the relay is in the open state, it indicates that the outdoor environment temperature is higher, the refrigerating machine oil in the compressor is already at a proper temperature, and the compressor can normally operate. Therefore, when the controller receives a compressor starting instruction, the controller controls the compressor to start and controls the relay to keep the off state until the compressor stops running. In the running process of the compressor, even if the outdoor environment temperature is reduced, the heat generated in the working process of the compressor is enough to keep the refrigerating machine oil in the compressor at a proper temperature, so that the electric heating assembly is not needed to heat, and the control relay keeps an off state until the compressor stops running. Therefore, the energy consumption of the air conditioner operation is further reduced while the normal operation of the compressor is ensured. .
In one embodiment of the invention, the electrical heating assembly comprises at least one electrical heating strip, each electrical heating strip being connected in series with a relay. As shown in fig. 4, the controller is configured to: if the outdoor environment temperature exceeds the second preset temperature but does not exceed the first preset temperature, controlling the relays in the first preset number to be closed so as to start the electric heating belts in the first preset number which are connected with the relays in the first preset number in series to heat the bottom of the compressor; wherein the second preset temperature is lower than the first preset temperature.
Specifically, when the air conditioner is powered on, the temperature of the outdoor environment is acquired by the outdoor environment temperature sensor. When the outdoor ambient temperature exceeds a first preset temperature, for example 10 ℃, all relays are switched off so that all electric heating strips are not activated. When a second preset temperature, for example-8 ℃ is exceeded but not 10 ℃ above the first preset temperature, a first preset number of electric heating strips are activated preferentially, for example, a relay is controlled to close, so as to activate one electric heating strip to heat the bottom of the compressor. In a specific embodiment, when the air conditioner is in a standby mode, the standby power consumption is low at a low temperature, and only one electric heating belt is started for saving energy.
In one embodiment of the present invention, as shown in fig. 4, the controller is configured to: and if the outdoor environment temperature exceeds a third preset temperature but does not exceed a second preset temperature, controlling the relays in the second preset number to be closed so as to start the electric heating belts in the second preset number connected in series with the relays in the second preset number to heat the bottom of the compressor, wherein the third preset temperature is lower than the second preset temperature, and the first preset number is lower than the second preset number.
In a specific embodiment, the second preset temperature is, for example, -8 ℃, and the third preset temperature is, for example, -15 ℃, then when the air conditioner is powered on, the temperature of the outdoor environment is acquired by the outdoor environment temperature sensor. When the outdoor ambient temperature exceeds a first preset temperature, for example 10 ℃, all relays are switched off so that all electric heating strips are not activated. When the outdoor ambient temperature exceeds-15 ℃ but does not exceed-8 ℃, a second preset number of electric heating belts are preferentially started, for example, two relays are controlled to be closed, so that two electric heating belts are simultaneously started to heat the bottom of the compressor.
In one embodiment of the present invention, as shown in fig. 4, the controller is configured to: and if the outdoor environment temperature does not exceed a third preset temperature, controlling the relays in a third preset number to be closed so as to start the electric heating belts in the third preset number which are connected with the relays in the third preset number in series to heat the bottom of the compressor, wherein the second preset number is smaller than the third preset number.
In a specific embodiment, the third preset temperature is, for example, -15 ℃, and when the air conditioner is powered on, the temperature of the outdoor environment is acquired through the outdoor environment temperature sensor. When the outdoor ambient temperature exceeds a first preset temperature, for example 10 ℃, all the electric heating bands are not activated. When the outdoor environment temperature does not exceed-15 ℃, a third preset number of electric heating belts are preferentially started, for example, three relays are controlled to be closed, so that three electric heating belts are simultaneously started to heat the bottom of the compressor.
It can be understood that when the air conditioner is powered on, the number of the starting electric heating belts is related to the temperature of the outdoor environment, and the lower the temperature of the outdoor environment, the more the number of the starting electric heating belts are, the outdoor environment temperature is related to the number of the starting electric heating belts, so that the compressor bottom can be heated, and meanwhile, energy is saved. In a specific embodiment, the choice of the high-power electric heating assembly can be determined according to the power of the compressor used, and the starting torque is large and the starting is difficult when the power of the compressor is larger and the current is also large. Therefore, the high-power electric heating components of the compressors with different powers can be properly adjusted, and meanwhile, the temperature value for starting the electric heating components can be determined according to the outdoor environment temperature and can also be adjusted according to the product condition. It should be noted that the temperature value or the preset temperature value with the best lubricating property of the refrigerating machine oil is due to different oil products, and the specific best temperature value of the refrigerating machine oil varies, and the refrigerating machine oil used by the compressor using the R290 refrigerant at present is lipid oil, and the best temperature of the refrigerating machine oil is about 50 ℃.
According to the air conditioner disclosed by the embodiment of the invention, when the air conditioner is electrified, the compressor is not started, the relay is controlled according to the outdoor environment temperature, the electric heating assembly is started, the bottom of the compressor is continuously heated in a short time, so that the refrigerating machine oil in the compressor is ensured to be within a proper temperature range, the compressor can be normally started under the low-temperature condition, meanwhile, the oil blockage problem is prevented, namely, the normal starting and operation of the air conditioner under the low-temperature condition are ensured after the compressor starting instruction is received. Meanwhile, when the air conditioner is powered on, the number of the starting electric heating strips is adjusted according to the temperature of the outdoor environment, namely, the outdoor environment temperature is related to the number of the starting electric heating strips, so that the bottom of the compressor can be heated, and meanwhile, energy is saved.
A further embodiment of the present invention also discloses a control method of an air conditioner, and fig. 5 is a flowchart of the control method of the air conditioner according to an embodiment of the present invention. As shown in fig. 5, a control method of an air conditioner includes the steps of:
step S1, determining that the air conditioner is powered on.
Step S2, controlling the relay to be closed or opened according to the outdoor environment temperature, and when the relay is in a closed state, enabling the electric heating component to be started to heat the bottom of the compressor; and when the relay is in an off state, the electric heating assembly is not started, and the bottom of the compressor is not heated.
In one embodiment of the present invention, controlling the relay to be closed or opened according to the outdoor ambient temperature includes: and judging whether the outdoor environment temperature does not exceed a first preset temperature, if so, controlling the relay to be closed so as to start the electric heating assembly, otherwise, controlling all the relays to be disconnected so as to not start all the electric heating assemblies.
In an embodiment of the present invention, the method for controlling an air conditioner further includes: determining that a compressor starting instruction is received; controlling the starting of the compressor; judging the on-state or off-state of the relay, and if the relay is in the on-state, controlling the relay to be off after first preset time; and if the relay is in the off state, controlling the relay to keep the off state.
In one embodiment of the invention, the electrical heating assembly comprises at least one electrical heating strip, each electrical heating strip being connected in series with a relay. The control method of the air conditioner further comprises the following steps: and if the outdoor environment temperature exceeds a second preset temperature but does not exceed the first preset temperature, controlling the relays of the first preset number to be closed so as to start the electric heating belts of the first preset number connected in series with the relays of the first preset number to heat the bottom of the compressor, wherein the second preset temperature is less than the first preset temperature.
In an embodiment of the present invention, the method for controlling an air conditioner further includes: and if the outdoor environment temperature exceeds a third preset temperature but does not exceed a second preset temperature, controlling the relays in the second preset number to be closed so as to start the electric heating belts in the second preset number connected in series with the relays in the second preset number to heat the bottom of the compressor, wherein the third preset temperature is lower than the second preset temperature, and the first preset number is lower than the second preset number.
It should be noted that, when the control method of the air conditioner according to the embodiment of the present invention is used to control the air conditioner, a specific implementation manner of the control method of the air conditioner according to the embodiment of the present invention is similar to that of the control method of the air conditioner according to the above embodiment of the present invention, and please refer to the description of the air conditioner specifically, and therefore, in order to reduce redundancy, the detailed description is omitted here.
According to the control method of the air conditioner, when the air conditioner is powered on, the compressor is not started, the relay is controlled according to the outdoor environment temperature, the electric heating assembly is started, the bottom of the compressor is continuously heated in a short time, so that the refrigerating machine oil in the compressor is ensured to be within a proper temperature range, the compressor can be normally started under the low-temperature condition, meanwhile, the oil blockage problem is prevented, namely, the air conditioner is ensured to be normally started and operated under the low-temperature condition after the compressor starting instruction is received. Meanwhile, when the air conditioner is powered on, the number of the starting electric heating strips is adjusted according to the temperature of the outdoor environment, namely, the outdoor environment temperature is related to the number of the starting electric heating strips, so that the bottom of the compressor can be heated, and meanwhile, energy is saved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An air conditioner, comprising:
the refrigeration system is used for exchanging the positions of a suction pipe and an exhaust pipe in the refrigeration cycle system so as to heat indoor air by using an evaporator to realize the heating operation of the air conditioner, and comprises a compressor which 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 a condenser;
an outdoor ambient temperature sensor for detecting an outdoor ambient temperature;
the electric heating assembly is used for heating the bottom of the compressor;
a relay in series with the electrical heating assembly;
the controller is configured to: determining that the air conditioner is powered on; controlling the relay to be switched on or off according to the outdoor environment temperature, and when the relay is in the closed state, starting the electric heating assembly to heat the bottom of the compressor; and when the relay is in the off state, the electric heating assembly is not started, and the bottom of the compressor is not heated.
2. The air conditioner according to claim 1, wherein the control appliance body is configured to:
and judging whether the outdoor environment temperature does not exceed a first preset temperature, if so, controlling the relay to be closed so as to start the electric heating assembly, otherwise, controlling the relay to be disconnected so as to make the electric heating assembly not start.
3. The air conditioner according to claim 2, wherein the control appliance body is configured to:
determining that a compressor starting instruction is received;
controlling the compressor to start;
judging whether the relay is in the closed state or the open state, and if the relay is in the closed state, controlling the relay to be opened after first preset time; and if the relay is in the off state, controlling the relay to maintain the off state.
4. The air conditioner of claim 2, wherein the electrical heating assembly comprises at least one electrical heating strip, each electrical heating strip connected in series with one of the relays, the controller body configured to:
if outdoor ambient temperature exceeds second preset temperature but does not exceed first preset temperature, then control first preset quantity the relay is closed to make with the first preset quantity of relay series connection of first preset quantity the electric heating area starts, in order to right the bottom of compressor heats, wherein, second preset temperature is less than first preset temperature.
5. The air conditioner according to claim 4, wherein the control appliance body is configured to:
if outdoor ambient temperature exceeds third preset temperature but does not exceed the second preset temperature, then control the second preset quantity the relay is closed, so that with the second preset quantity that the relay of second preset quantity establishes ties the electric heating tape starts, in order to right the bottom of compressor heats, wherein, third preset temperature is less than the second preset temperature, first preset quantity is less than the second preset quantity.
6. A method of controlling an air conditioner, comprising:
determining that the air conditioner is powered on;
controlling the relay to be switched on or off according to the outdoor environment temperature, and when the relay is in the closed state, starting the electric heating assembly to heat the bottom of the compressor; and when the relay is in the off state, the electric heating assembly is not started, and the bottom of the compressor is not heated.
7. The control method of an air conditioner according to claim 6, wherein controlling the relay to be closed or opened according to the outdoor ambient temperature includes:
and judging whether the outdoor environment temperature does not exceed a first preset temperature, if so, controlling the relay to be closed so as to start the electric heating assembly, otherwise, controlling the relay to be disconnected so as to make the electric heating assembly not start.
8. The control method of an air conditioner according to claim 7, further comprising:
determining that a compressor starting instruction is received;
controlling the compressor to start;
judging whether the relay is in the closed state or the open state, and if the relay is in the closed state, controlling the relay to be opened after first preset time; and if the relay is in the off state, controlling the relay to maintain the off state.
9. The control method of an air conditioner according to claim 7, wherein said electric heating assembly includes at least one electric heating strip, each of said electric heating strips being connected in series to one of said relays, said method further comprising:
if outdoor ambient temperature exceeds second preset temperature but does not exceed first preset temperature, then control first preset quantity the relay is closed to make with the first preset quantity of relay series connection of first preset quantity the electric heating area starts, in order to right the bottom of compressor heats, wherein, second preset temperature is less than first preset temperature.
10. The control method of an air conditioner according to claim 9, further comprising:
if outdoor ambient temperature exceeds third preset temperature but does not exceed the second preset temperature, then control the second preset quantity the relay is closed, so that with the second preset quantity that the relay of second preset quantity establishes ties the electric heating tape starts, in order to right the bottom of compressor heats, wherein, third preset temperature is less than the second preset temperature, first preset quantity is less than the second preset quantity.
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| CN202210748944.1A CN114893878A (en) | 2022-06-29 | 2022-06-29 | Air conditioner and control method thereof |
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| CN116026000A (en) * | 2022-12-12 | 2023-04-28 | 珠海格力电器股份有限公司 | Air conditioner electric heating treatment method and device, air conditioner and storage medium |
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