CN115247863B - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
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- CN115247863B CN115247863B CN202210973161.3A CN202210973161A CN115247863B CN 115247863 B CN115247863 B CN 115247863B CN 202210973161 A CN202210973161 A CN 202210973161A CN 115247863 B CN115247863 B CN 115247863B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims description 51
- 239000003507 refrigerant Substances 0.000 claims description 25
- 230000001360 synchronised effect Effects 0.000 claims description 23
- 238000010257 thawing Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 description 8
- 238000005057 refrigeration Methods 0.000 description 6
- 238000004378 air conditioning Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 239000007791 liquid phase Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- F24F11/46—Improving electric energy efficiency or saving
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—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
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Fluid Mechanics (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: the indoor unit control unit is connected with the temperature controller and is used for receiving an electric auxiliary heat control signal and a fan rotating speed control signal output by the temperature controller so as to control the operation of the indoor fan and the electric auxiliary heat device; the outdoor unit control unit is connected with the temperature controller and is used for receiving a compressor control signal, a four-way valve control signal and a fan rotating speed control signal which are output by the temperature controller so as to control the operation of the compressor, the four-way valve and the outdoor fan; the fan rotating speed control signal output end of the temperature control is connected with the first control signal input end of the motor and used for controlling the motor to drive the indoor fan to operate according to a first preset rotating speed according to the fan rotating speed control signal, so that the power consumption of the whole machine is reduced, and the energy efficiency is improved.
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
At present, indoor units of air conditioning systems in North America can be matched with outdoor units of different brands, commonly called as replacement units, and the system mainly comprises a temperature controller, the outdoor units and the indoor units. The system is characterized in that the temperature controller adopts a public communication protocol and a communication mode (generally a 24V alternating current communication system), the outdoor unit is used for controlling the operation of an outdoor fan, the compressor and a four-way valve by sending signals for starting the compressor and switching the four-way valve to the outdoor unit, and the indoor unit controller is used for automatically controlling the operation of the indoor fan and the electric auxiliary heating device by sending signals for starting the electric auxiliary heating and the indoor fan to the indoor unit, and simultaneously provides 24V alternating current control power supply for the system. The main disadvantage of the air conditioning system is that after the rotational speed parameters of the indoor fan are determined when leaving the factory, the air conditioning system can only operate at one of the high wind speeds, namely the rotational speed of the indoor fan cannot be changed under different operation modes of the air conditioner, so that the power consumption of the whole air conditioning system is high and the energy efficiency is low.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention aims to provide an air conditioner and a control method thereof.
The invention provides an air conditioner, comprising: the system comprises a refrigerating system, an indoor unit control unit, an outdoor unit control unit, a motor, an electric auxiliary heating device and a temperature controller; the refrigerating system is used for exchanging the positions of the air suction pipe and the air discharge pipe in the refrigerating circulation system so as to heat indoor air by using the evaporator to realize heating operation of the air conditioner, and comprises a compressor for compressing low-temperature low-pressure refrigerant gas into high-temperature high-pressure refrigerant gas and discharging the high-temperature high-pressure refrigerant gas to the condenser; the indoor unit control unit is connected with the temperature controller and is used for receiving an electric auxiliary heating control signal and a fan rotating speed control signal which are output by the temperature controller so as to control the operation of the indoor fan and the electric auxiliary heating device; the outdoor unit control unit is connected with the temperature controller and is used for receiving a compressor control signal, a four-way valve control signal and a fan rotating speed control signal which are output by the temperature controller so as to control the operation of the compressor, the four-way valve and the outdoor fan; the temperature-controlled fan rotating speed control signal output end is connected with the first control signal input end of the motor and used for controlling the motor to drive the indoor fan to operate according to a first preset rotating speed according to the fan rotating speed control signal.
In addition, the air conditioner according to the embodiment of the invention can also have the following additional technical characteristics:
further, the air conditioner further includes: the first relay comprises a first contact, a third contact and a first control coil, wherein the first contact is connected with a compressor control signal output end of the temperature controller, the second contact is connected with a third control signal input end of the motor, the third contact is connected with a second control signal input end of the motor, one end of the first control coil is connected with a power supply common end of the temperature controller, and the first control coil can control the first contact to be connected with the second contact or the third contact.
Further, the air conditioner further includes: the second relay comprises a fourth contact, a fifth contact and a second control coil, the fourth contact is connected with the control signal output end of the compressor of the temperature controller, the fifth contact is connected with the other end of the first control coil, one end of the second control coil is connected with a reference voltage, and the other end of the second control coil is connected with the outdoor unit control unit.
Further, the air conditioner further includes: the first end and the second end of the selection switch are respectively connected with the electric auxiliary heating control signal output end of the temperature controller, the third end of the selection switch is connected with the fifth control signal input end of the motor, and the fourth end of the selection switch is connected with the fourth control signal input end of the motor.
Further, the motor is an ECM permanent magnet synchronous motor.
According to the air conditioner disclosed by the embodiment of the invention, the characteristics of the ECM permanent magnet synchronous motor are fully utilized, the motor receives different motor rotation speed control signals under different complete machine capacity requirements, and the indoor fan is driven to run at different rotation speeds, so that the power consumption of the complete machine is reduced, the energy efficiency is improved, and meanwhile, the electric auxiliary heating dry burning is avoided.
In order to solve the above-mentioned problems, the present invention further provides a control method of an air conditioner, which is used for the air conditioner according to any one of the embodiments, and the method includes: the motor receives an air supply control instruction of the inner machine so as to control the indoor fan to operate according to a first preset rotating speed.
In addition, the control method of the air conditioner according to the embodiment of the invention can also have the following additional technical characteristics:
further, the method further comprises: when the indoor unit control unit receives a compressor starting control instruction, a first contact of the first relay is connected to a second contact, so that the motor controls the indoor fan to operate according to a second preset rotating speed, and the second preset rotating speed is larger than the first preset rotating speed.
Further, after the motor controls the indoor fan to operate according to the second preset rotating speed, the method further comprises the following steps: and controlling the rotating speed of the indoor fan according to the operating frequency of the compressor.
Further, according to the operation frequency of the compressor, controlling the rotation speed of the indoor fan includes: when the operation frequency of the compressor is lower than the preset operation frequency, the outdoor unit control unit controls the second control coil of the second relay to be closed, so that the motor controls the indoor fan to operate according to a third preset rotating speed, wherein the third preset rotating speed is higher than the first preset rotating speed and lower than the second preset rotating speed.
Further, the air conditioner further comprises a third relay, and the method further comprises: and the indoor unit control unit receives a defrosting control instruction and controls the third control coil of the third relay to be closed so that the motor controls the indoor fan to operate according to a fourth preset rotating speed, wherein the fourth preset rotating speed is larger than the second preset rotating speed.
According to the control method of the air conditioner, the characteristics of the ECM permanent magnet synchronous motor are fully utilized, the motor receives different motor rotating speed control signals under different complete machine capacity requirements, and the indoor fan is driven to operate at different rotating speeds, so that the complete machine power consumption is reduced, the energy efficiency is improved, and meanwhile, electric auxiliary heating and dry burning are avoided.
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 foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic view of a structure of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic view of an air conditioner according to another embodiment of the present invention;
fig. 3 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should 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 the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The terms "first," "second," and the like, 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 defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The air conditioner of the present invention performs a refrigerating 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 a 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 may achieve a cooling effect by exchanging heat with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner may 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 function as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater of a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler of a cooling mode.
In 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 flows through the condenser to heat the indoor air by heat exchange with the indoor air, and is cooled by self-heat radiation. The low-temperature high-pressure refrigerant whose temperature is removed by the condenser is depressurized by the expansion valve to be changed into a low-temperature low-pressure refrigerant. The refrigerant flowing into the evaporator through the expansion valve is heated by heat exchange with the outdoor air. The primarily low temperature gaseous refrigerant is then 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 are described below with reference to fig. 1 to 3.
Fig. 1 and 2 are schematic views of an air conditioner according to an embodiment of the present invention. As shown in fig. 1, an air conditioner includes: the refrigeration system 10, the indoor unit 20, the indoor unit control unit 30, the outdoor unit 40, the outdoor unit control unit 50, the motor 60, the electric auxiliary heating device 70 and the temperature controller 80; the refrigeration system 10 is configured to exchange positions of an air suction pipe and an air discharge pipe in the refrigeration cycle system, so as to heat indoor air by using an evaporator, so as to realize heating operation of an air conditioner, and the refrigeration system comprises a compressor, wherein the compressor is used for compressing low-temperature low-pressure refrigerant gas into high-temperature high-pressure refrigerant gas and discharging the high-temperature high-pressure refrigerant gas to a condenser; as shown in fig. 2, the indoor unit control unit 30 is connected to the temperature controller 80, and is configured to receive an electric auxiliary heat control signal and a fan rotation speed control signal output from the temperature controller 80, so as to control the operation of an indoor fan (not shown) and the electric auxiliary heat device 70; the outdoor unit control unit 50 is connected with the temperature controller 80 and is used for receiving a compressor control signal, a four-way valve control signal and a fan rotating speed control signal output by the temperature controller 80 so as to control the operation of the compressor, the four-way valve and the outdoor fan; the fan rotation speed control signal output end of the temperature controller 80 is connected to the first control signal input end of the motor 60, and is used for controlling the motor 60 to drive the indoor fan to operate according to a first preset rotation speed according to the fan rotation speed control signal, wherein the motor 60 is an ECM permanent magnet synchronous motor.
Specifically, the temperature controller 80 may receive a control instruction input by a user, for example, by pressing a button to control the air conditioner to enter an air supply mode, a cooling mode, a heating mode or an electric auxiliary heating mode; the electric auxiliary heating device 70 is used for assisting the air conditioner to heat, and the ECM permanent magnet synchronous motor has a constant torque characteristic and has 5 rotational speeds, namely, comprises 5 control signal input ends and is used for receiving different motor rotational speed control signals so as to drive the indoor fan to operate according to different rotational speeds. As shown in fig. 2, the ECM permanent magnet synchronous motor includes five control signal input ends, for example, a first control signal input end to a fifth control signal input end, which respectively correspond to a first preset rotation speed to a fifth preset rotation speed of the indoor fan, wherein the first preset rotation speed is the smallest, and the corresponding indoor fan wind speed is the smallest; the fifth preset rotation speed is the largest, and the corresponding indoor fan rotation speed is the largest, and the first control signal input end corresponds to the 1 st wind speed of the indoor fan and the fifth control signal input end corresponds to the 5 th wind speed of the indoor fan.
In a specific embodiment, as shown in fig. 2, after the temperature controller 80 receives a control instruction input by a user and entering an electric auxiliary heating mode, the indoor fan and the electric auxiliary heating device 70 can be controlled to operate by the indoor unit control unit 50, at this time, the electric auxiliary heating control signal output end of the temperature controller 80 is connected to the first end and the second end of the selection switch 90, if the selection switch 90 is in a closed state, the electric auxiliary heating control signals are simultaneously output to the fourth control signal input end and the fifth control signal input end of the ECM permanent magnet synchronous motor, respectively corresponding to the 4 th wind speed and the 5 th wind speed of the indoor fan, and because the ECM permanent magnet synchronous motor has one characteristic that when a plurality of control signals are simultaneously received, the indoor fan is driven to operate according to the maximum wind speed, therefore, at this time, the motor 60 operates at the fifth preset rotation speed, the wind speed of the indoor fan is also maximum, and therefore, when the outdoor unit 20 is in defrosting, after the indoor fan is started, the electric auxiliary heating is started, the indoor fan is prevented from operating at the maximum rotation speed; after the temperature controller 80 receives a control instruction input by a user and entering an air supply mode, as the fan rotating speed control signal output end of the temperature controller 80 is connected with the first control signal input end of the ECM permanent magnet synchronous motor and corresponds to the 1-gear wind speed of the indoor fan, the indoor fan can be driven by the ECM permanent magnet synchronous motor to operate according to the first preset rotating speed (namely, the 1-gear wind speed), and therefore, when only the indoor unit is required to supply air, the indoor fan can be controlled to operate according to the lowest rotating speed, so that the power consumption of the whole machine is reduced, and the energy efficiency is improved. Therefore, the embodiment of the invention fully utilizes the characteristics of the ECM permanent magnet synchronous motor, and realizes that the indoor fan runs at different rotating speeds under different capacity requirements of the whole machine, thereby reducing the power consumption of the whole machine, improving the energy efficiency and simultaneously avoiding electric auxiliary heating dry combustion.
In one embodiment of the present invention, the air conditioner further includes: the first relay 100, the first relay includes first contact to third contact, first control coil, and the compressor control signal output of temperature controller is connected to first contact, and the third control signal input of motor is connected to the second contact, and the second control signal input of motor is connected to the third contact, and the power common terminal of temperature controller is connected to the one end of first control coil, and wherein, first control coil steerable first contact is connected to second contact or third contact.
Specifically, the first relay 100 is a single pole double throw relay, and the second contact is, for example, a normally closed contact, that is, when the first control coil is not energized, the second contact is connected to the first contact, and when the first control coil is energized, the first contact is connected to the third contact.
In a specific embodiment, as shown in fig. 2, after the temperature controller 80 receives a control instruction input by a user and entering a cooling or heating mode, the outdoor unit control unit 50 controls the compressor, the four-way valve and the outdoor fan to operate, at this time, the compressor is started, and since the first contact is connected with the second contact, the second contact is connected with the third control signal input end of the ECM permanent magnet synchronous motor, that is, the 3-gear wind speed, the ECM permanent magnet synchronous motor receives the control signal of the compressor output by the temperature controller 80, and then drives the indoor fan to operate according to the third preset rotation speed (that is, the 3-gear wind speed), that is, in the cooling or heating mode, the indoor fan is controlled to operate according to the 3-gear wind speed. Therefore, the indoor fan is further realized to run at different rotating speeds under the requirements of different complete machine capacities, so that the power consumption of the complete machine is reduced, the energy efficiency is improved, and meanwhile, the electric auxiliary heating dry combustion is avoided.
In one embodiment of the present invention, the air conditioner further includes: the second relay 110, the second relay 110 includes fourth contact, fifth contact and second control coil, and the compressor control signal output of temperature controller is connected to the fourth contact, and the other end of first control coil is connected to the fifth contact, and reference voltage is connected to one end of second control coil, and the other end of second control coil is connected to the off-premises station control unit.
Specifically, the second relay 110 is a single pole single throw relay, when the second control coil is not energized, the fourth contact and the fifth contact are disconnected, and the first control coil is not energized; when the second control coil is electrified, the fourth contact is connected with the fifth contact, at the moment, the first control coil is electrified to enable the first contact to be connected with the third contact, the third contact is connected with a second control signal input end of the ECM permanent magnet synchronous motor, and the indoor fan is driven to operate according to a second preset rotating speed (namely, 2-gear wind speed).
In a specific embodiment, as shown in fig. 2, in the cooling or heating mode, when the operating frequency of the compressor is low, the outdoor unit control unit 50 controls the second control coil to be energized, the fourth contact is connected with the fifth contact, the first control coil is energized to connect the first contact with the third contact, and the third contact is connected with the second control signal input end of the ECM permanent magnet synchronous motor, so that the wind speed of the indoor unit is reduced from 3 speeds to 2 speeds, that is, when the operating frequency of the compressor is reduced, the rotating speed of the indoor fan is also reduced, so that the power consumption of the whole machine is further reduced, and the energy efficiency is improved.
In one embodiment of the present invention, the air conditioner further includes: the third relay 120, the third relay 120 includes a sixth contact, a seventh contact and a third control coil, the sixth contact is connected with the temperature controller, the seventh contact is connected with a 220V power supply, one end of the third control coil is connected with an electric auxiliary heating control signal output end of the temperature controller 80, and the other end of the third control coil is connected with a power supply common end of the temperature controller 80.
Specifically, the third relay 120 is a single pole single throw relay, and when the third coil is not energized, the sixth contact and the seventh contact are disconnected, and the electric auxiliary heating device does not work; when the third coil is electrified, the sixth contact is connected with the seventh contact, and the electric auxiliary heating device operates to assist the air conditioner to heat. For example, as shown in fig. 2, when the temperature controller 80 receives a control instruction input by a user to enter the electric auxiliary heating mode, the third coil is electrified, the electric auxiliary heating device 70 is electrified, and the selector switch 90 is in a closed state, so that the indoor fan operates at the highest rotating speed, and the electric auxiliary heating is prevented from being dried.
In one embodiment of the present invention, the air conditioner further includes: the first end and the second end of the selection switch 90 are respectively connected with the electric auxiliary heating control signal output end of the temperature controller 80, the third end of the selection switch 90 is connected with the fifth control signal input end of the motor 60, and the fourth end of the selection switch 90 is connected with the fourth control signal input end of the motor 60.
Specifically, the selection switch 90 is similar to including a plurality of individual switches, the on or off state of which is related to the heating capacity of the air conditioner. In a specific embodiment, the stronger the heating capacity of the air conditioner, the more the number of the individual switches in the selection switch 90 are in the closed state, and the indoor fan selects the wind speed operation corresponding to the highest gear in the plurality of gears. The open or closed state of the selector switch 90 is set by the air conditioner when leaving the factory, and the stronger the heating capacity of the air conditioner is, the larger the gear of the indoor fan wind speed corresponding to the individual switch in the closed state is. Specifically, when the air conditioner enters a defrosting state, the heating capacity of the air conditioner is higher, the wind speed of an indoor fan required during defrosting is higher, and at the moment, the gear of the wind speed of the indoor unit corresponding to an independent switch in a closed state in the selection switch 90 is required to be set to be higher, so that the indoor unit operates at a high wind speed during defrosting of the air conditioner, and electric auxiliary heating and dry burning are prevented.
According to the air conditioner disclosed by the embodiment of the invention, the characteristics of the ECM permanent magnet synchronous motor are fully utilized, the motor receives different motor rotation speed control signals under different complete machine capacity requirements, and the indoor fan is driven to run at different rotation speeds, so that the power consumption of the complete machine is reduced, the energy efficiency is improved, and meanwhile, the electric auxiliary heating dry burning is avoided.
Further embodiments of the present invention also disclose a control method of an air conditioner, which is used for the air conditioner according to any of the above embodiments, and fig. 3 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention. As shown in fig. 3, the method comprises the steps of:
and S1, the motor receives an air supply control instruction of the inner machine so as to control the indoor fan to operate according to a first preset rotating speed.
Specifically, as shown in fig. 2, after the temperature controller receives a control instruction input by a user and entering an air supply mode, a fan rotating speed control signal output end of the temperature controller is connected with a first control signal input end of the ECM permanent magnet synchronous motor, and drives the indoor fan to operate according to a first preset rotating speed (namely, a 1-gear wind speed), so that when only the indoor unit is required to supply air, the indoor fan can be controlled to operate according to the lowest rotating speed, thereby reducing the power consumption of the whole machine and improving the energy efficiency.
In one embodiment of the present invention, the control method of the air conditioner further includes:
and S2, when the indoor unit control unit receives a compressor starting control instruction, the first contact of the first relay is connected to the second contact, so that the motor controls the indoor fan to operate according to a second preset rotating speed, wherein the second preset rotating speed is larger than the first preset rotating speed.
In a specific embodiment, as shown in fig. 2, after the temperature controller receives a control instruction input by a user and entering a cooling or heating mode, the indoor unit control unit receives a compressor start control instruction, and the second contact is connected with a third control signal input end of the ECM permanent magnet synchronous motor, namely, 3-gear wind speed, so that the ECM permanent magnet synchronous motor drives the indoor fan to operate according to a second preset rotating speed (namely, 3-gear wind speed) after receiving a compressor control signal output by the temperature controller.
It should be noted that, in other variant embodiments, the step S1 and the step S2 are executed in parallel, and the step S1 may be executed first and then the step S2 may be executed first, or the step S2 may be executed first and then the step S1 may be executed.
In one embodiment of the present invention, after the motor controls the indoor fan to operate at the second preset rotation speed, the method further includes: and controlling the rotating speed of the indoor fan according to the operating frequency of the compressor.
In one embodiment of the present invention, controlling the rotational speed of the indoor fan according to the operation frequency of the compressor includes: when the operation frequency of the compressor is lower than the preset operation frequency, the outdoor unit control unit controls the second control coil of the second relay to be closed so that the motor controls the indoor fan to operate according to a third preset rotating speed, wherein the third preset rotating speed is greater than the first preset rotating speed and smaller than the second preset rotating speed.
In a specific embodiment, as shown in fig. 2, in a cooling or heating mode, when the operation frequency of the compressor is lower, that is, lower than the preset operation frequency, the outdoor unit control unit controls the second control coil to be electrified, the fourth contact is connected with the fifth contact, the first control coil is electrified, the first contact is connected with the third contact, and the third contact is connected with the second control signal input end of the ECM permanent magnet synchronous motor, so that the wind speed of the indoor unit is reduced from 3 wind speeds (that is, the second preset rotation speed) to 2 wind speeds (that is, the third preset rotation speed), that is, when the operation frequency of the compressor is reduced, the rotation speed of the indoor fan is also reduced, so that the power consumption of the whole machine is further reduced, and the energy efficiency is improved.
In one embodiment of the present invention, the air conditioner further includes a third relay, and the method further includes:
and step S3, the indoor unit control unit receives a defrosting control instruction and controls the third control coil of the third relay to be closed so that the motor controls the indoor fan to operate according to a fourth preset rotating speed, wherein the fourth preset rotating speed is larger than the second preset rotating speed.
In a specific embodiment, as shown in fig. 2, when the air conditioner enters a defrosting state, the third coil is electrified, the sixth contact is connected with the seventh contact, the electric auxiliary heating device operates to assist the air conditioner to heat, meanwhile, an electric auxiliary heating control signal output by the temperature controller is output to a fourth control signal input end and a fifth control signal input end of the ECM permanent magnet synchronous motor through the selection switch, at the moment, the wind speed of the indoor fan is the largest, and the electric auxiliary heating device operates at 5-gear wind speed (namely, a fourth preset rotating speed) to prevent electric auxiliary heating from dry burning.
It should be noted that, in other variant embodiments, the steps S1, S2, and S3 are executed in parallel, and in other variant embodiments, the steps S1 may be executed first and then the steps S2 and S3 may be executed first, which is not described herein.
According to the control method of the air conditioner, the characteristics of the ECM permanent magnet synchronous motor are fully utilized, the motor receives different motor rotating speed control signals under different complete machine capacity requirements, and the indoor fan is driven to operate at different rotating speeds, so that the complete machine power consumption is reduced, the energy efficiency is improved, and meanwhile, electric auxiliary heating and dry burning are avoided.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means 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, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. An air conditioner, comprising: the system comprises a refrigerating system, an indoor unit control unit, an outdoor unit control unit, a motor, an electric auxiliary heating device, a first relay and a temperature controller; wherein,,
the refrigerating system is used for exchanging the positions of the air suction pipe and the air discharge pipe in the refrigerating circulation system so as to heat indoor air by utilizing the evaporator to realize heating operation of the air conditioner, and comprises a compressor which is used for compressing low-temperature low-pressure refrigerant gas into high-temperature high-pressure refrigerant gas and discharging the high-temperature high-pressure refrigerant gas to the condenser;
the indoor unit control unit is connected with the temperature controller and is used for receiving an electric auxiliary heating control signal and a fan rotating speed control signal which are output by the temperature controller so as to control the operation of the indoor fan and the electric auxiliary heating device;
the outdoor unit control unit is connected with the temperature controller and is used for receiving a compressor control signal, a four-way valve control signal and a fan rotating speed control signal which are output by the temperature controller so as to control the operation of the compressor, the four-way valve and the outdoor fan;
the fan rotating speed control signal output end of the temperature controller is connected with the first control signal input end of the motor and is used for controlling the motor to drive the indoor fan to operate according to a first preset rotating speed according to the fan rotating speed control signal;
the first relay comprises a first contact, a third contact and a first control coil, wherein the first contact is connected with a compressor control signal output end of the temperature controller, the second contact is connected with a third control signal input end of the motor, the third contact is connected with a second control signal input end of the motor, one end of the first control coil is connected with a power supply common end of the temperature controller, and the first control coil can control the first contact to be connected with the second contact or the third contact.
2. The air conditioner of claim 1, further comprising:
the second relay comprises a fourth contact, a fifth contact and a second control coil, the fourth contact is connected with the control signal output end of the compressor of the temperature controller, the fifth contact is connected with the other end of the first control coil, one end of the second control coil is connected with a reference voltage, and the other end of the second control coil is connected with the outdoor unit control unit.
3. The air conditioner of claim 1, further comprising:
the first end and the second end of the selection switch are respectively connected with the electric auxiliary heating control signal output end of the temperature controller, the third end of the selection switch is connected with the fifth control signal input end of the motor, and the fourth end of the selection switch is connected with the fourth control signal input end of the motor.
4. An air conditioner according to claim 1 wherein the motor is an ECM permanent magnet synchronous motor.
5. A control method of an air conditioner according to any one of claims 1 to 4, comprising:
the motor receives a fan rotating speed control signal sent by the temperature controller so as to control the indoor fan to operate according to a first preset rotating speed;
when the indoor unit control unit receives a compressor starting control instruction, a first contact of the first relay is connected to a second contact, so that the motor controls the indoor fan to operate according to a second preset rotating speed, and the second preset rotating speed is larger than the first preset rotating speed.
6. The method of controlling an air conditioner according to claim 5, further comprising, after the motor controls the indoor fan to operate at a second preset rotational speed:
and controlling the rotating speed of the indoor fan according to the operating frequency of the compressor.
7. The control method of an air conditioner according to claim 6, wherein controlling the rotational speed of the indoor fan according to the operation frequency of the compressor comprises:
when the operation frequency of the compressor is lower than the preset operation frequency, the outdoor unit control unit controls the second control coil of the second relay to be closed, so that the motor controls the indoor fan to operate according to a third preset rotating speed, wherein the third preset rotating speed is higher than the first preset rotating speed and lower than the second preset rotating speed.
8. The control method of an air conditioner according to claim 5, wherein the air conditioner further comprises a third relay, the method further comprising:
and the indoor unit control unit receives a defrosting control instruction and controls the third control coil of the third relay to be closed so that the motor controls the indoor fan to operate according to a fourth preset rotating speed, wherein the fourth preset rotating speed is larger than the second preset rotating speed.
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