CN114811876A - Air conditioner and control method thereof - Google Patents

Air conditioner and control method thereof Download PDF

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Publication number
CN114811876A
CN114811876A CN202210427402.4A CN202210427402A CN114811876A CN 114811876 A CN114811876 A CN 114811876A CN 202210427402 A CN202210427402 A CN 202210427402A CN 114811876 A CN114811876 A CN 114811876A
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China
Prior art keywords
fresh air
controlling
temperature
heat exchanger
threshold value
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Granted
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CN202210427402.4A
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CN114811876B (en
Inventor
朱磊
邹海如
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Hisense Guangdong Air Conditioning Co Ltd
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Hisense Guangdong Air Conditioning Co Ltd
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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
    • F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • 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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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides an air conditioner and a control method thereof, comprising the following steps: the outdoor unit is provided with a fresh air heat exchanger and a fresh air fan; a refrigerant circulation circuit; a compressor; a fresh air system; an indoor temperature sensor; an outdoor temperature sensor; the controller is configured to: determining the current operation mode of the air conditioner, and acquiring the indoor environment temperature and the outdoor environment temperature; a first temperature difference of the temperatures; and controlling the working states of the fresh air heat exchanger and the fresh air system according to the relation between the first temperature difference value and the preset temperature threshold value. According to the invention, based on the temperature difference between the indoor environment temperature and the outdoor environment temperature, the work of the fresh air system and the fresh air heat exchanger is controlled, the fresh air is introduced to reduce the temperature difference, the compressor is not required to be always in an opening state, and the energy is saved, and when the air conditioner is in different operation modes, the fresh air is pre-cooled or preheated through the fresh air heat exchanger, so that the problems of fresh air pipelines and indoor condensation caused by large temperature difference are avoided, and thus, the comfort of users is improved.

Description

Air conditioner and control method thereof
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, the fresh air conditioner can directly introduce the air from outdoor environment when normal work, however, when the difference in temperature of indoor ambient temperature and outdoor ambient temperature is great, when introducing the air from outdoor environment, produce the condensation easily, lead to user experience relatively poor. And, the indoor ambient temperature is always adjusted depending on the compressor, resulting in poor energy saving performance 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, a first objective of the present invention is to provide an air conditioner, which controls the working states of a fresh air heat exchanger and a fresh air system according to the relationship between a first temperature difference and a preset temperature threshold, so as to control the working of the fresh air system when the temperature difference between the indoor environment temperature and the outdoor environment temperature is large, reduce the temperature difference by introducing fresh air, and avoid the situation that the compressor is always in an on state, which is more energy-saving, and when the air conditioner is in different operation modes, the fresh air is pre-cooled or preheated by the fresh air heat exchanger, so as to avoid the problem that the temperature difference is large, which leads to condensation of a fresh air pipeline and the indoor environment, thereby improving the user comfort.
To this end, a second object of the present invention is to provide a control method of an air conditioner.
In order to achieve the above object, an embodiment of a first aspect of the present invention proposes an air conditioner including: the outdoor unit at least comprises a fresh air heat exchanger and a fresh air fan; the refrigerant circulation loop is used for circulating the refrigerant in a loop consisting of the compressor, the condenser, the electromagnetic expansion valve, the evaporator, the four-way valve and the pressure reducer; the compressor is used for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharging the high-temperature and high-pressure refrigerant gas to the condenser; the fresh air system leads fresh air to pass through a fresh air pipeline and leads the fresh air from the outdoor to the indoor under the action of a fresh air motor; the indoor temperature sensor is used for acquiring the indoor environment temperature; the outdoor temperature sensor is used for acquiring outdoor environment temperature; the controller is configured to: determining the current operation mode of the air conditioner, and acquiring the indoor environment temperature, the outdoor environment temperature and the set temperature of the air conditioner; calculating a first temperature difference value between the indoor environment temperature and the outdoor environment temperature; and controlling the working states of the fresh air heat exchanger and the fresh air system according to the relation between the first temperature difference value and at least one preset temperature threshold value.
According to the air conditioner provided by the embodiment of the invention, the working states of the fresh air heat exchanger and the fresh air system are controlled by determining the first temperature difference value of the indoor environment temperature and the outdoor environment temperature of the air conditioner in different operation modes and according to the relation between the first temperature difference value and the preset temperature threshold value, so that when the temperature difference value between the indoor environment temperature and the outdoor environment temperature is larger, the working of the fresh air system is controlled, the temperature difference value is reduced by introducing fresh air, the compressor is not required to be always in an open state, and the energy is saved.
In some embodiments, the controller is further configured to obtain a set temperature of the air conditioner, and when it is determined that the current operation mode of the air conditioner is the cooling mode, the controller is configured to control the working states of the fresh air heat exchanger and the fresh air system according to a relationship between the first temperature difference and at least one preset temperature threshold, specifically: when the first temperature difference value exceeds a first preset temperature threshold value, controlling the self-cleaning function of the fresh air heat exchanger to start, starting the compressor, controlling the fresh air system to start, and controlling the compressor to stop after the compressor is started for a first preset time so as to introduce fresh air from the outside through the fresh air pipeline; when the first temperature difference value is between the first preset temperature threshold value and the second preset temperature threshold value, controlling the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relation between the indoor environment temperature and the set temperature of the air conditioner; and when the first temperature difference value does not exceed the second preset temperature threshold value, controlling the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relation between the indoor environment temperature and the set temperature of the air conditioner, wherein the first preset temperature threshold value is greater than the second preset temperature threshold value.
In some embodiments, the controller is configured to control the operating states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relationship between the indoor ambient temperature and the set temperature of the air conditioner when the first temperature difference is between the first preset temperature threshold and the second preset temperature threshold, specifically: calculating a second temperature difference value between the indoor environment temperature and the set temperature of the air conditioner; when the second temperature difference value exceeds a third preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger, starting the compressor, controlling the fresh air system to be closed, and stopping introducing fresh air from the outdoor through the fresh air pipeline; when the second temperature difference value is between the fourth preset temperature threshold value and the third preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, controlling the fresh air system to be opened, and introducing fresh air from the outdoor through the fresh air pipeline; and when the second temperature difference value does not exceed the fourth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, and controlling the fresh air system to be started after the compressor runs for a second preset time so as to introduce fresh air from the outside through the fresh air pipeline, wherein the third preset temperature threshold value is greater than the fourth preset temperature threshold value.
In some embodiments, the controller is configured to control the operating states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relationship between the indoor ambient temperature and the air conditioner set temperature when the first temperature difference does not exceed the second preset temperature threshold, specifically: calculating a second temperature difference value between the indoor environment temperature and the set temperature of the air conditioner; when the second temperature difference value does not exceed a fifth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, and controlling the fresh air system to be started so as to introduce fresh air from the outdoor through the fresh air pipeline; and when the second temperature difference value exceeds a fifth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, and controlling a fresh air system to be started after a third preset time so as to introduce fresh air from the outdoor through the fresh air pipeline.
In some embodiments, when it is determined that the current operation mode of the air conditioner is the heating mode, the controller is configured to control the working states of the fresh air heat exchanger and the fresh air system according to a relationship between the first temperature difference and at least one preset temperature threshold, specifically: when the first temperature difference value exceeds a sixth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, and controlling the fresh air system to be opened so as to heat fresh air introduced from the fresh air pipeline by using the fresh air heat exchanger, wherein the temperature of the fresh air is lower than that of the fresh air pipeline; and when the first temperature difference value does not exceed the sixth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, and controlling the fresh air system to be opened so as to introduce fresh air with lower temperature from the outdoor through the fresh air pipeline and increase the humidity of indoor ambient air.
In some embodiments, the controller is configured to: controlling the self-cleaning function of the fresh air heat exchanger to be started, and specifically comprising the following steps: controlling the compressor and the electromagnetic expansion valve to be opened, and controlling the fresh air fan to repeatedly execute preset actions, wherein the preset actions comprise: and controlling the fresh air fan to operate for a third preset time and then stopping for a fourth preset time so that the fresh air heat exchanger is cleaned in the frosting and defrosting processes.
In order to achieve the above object, an embodiment of a second aspect of the present invention proposes a control method of an air conditioner, the method including: determining the current operation mode of the air conditioner, and acquiring the indoor environment temperature, the outdoor environment temperature and the set temperature of the air conditioner; calculating a first temperature difference value between the indoor environment temperature and the outdoor environment temperature; and controlling the working states of the fresh air heat exchanger and the fresh air system according to the relation between the first temperature difference value and at least one preset temperature threshold value.
According to the control method of the air conditioner, the first temperature difference value of the indoor environment temperature and the outdoor environment temperature of the air conditioner in different operation modes is determined, the working states of the fresh air heat exchanger and the fresh air system are controlled according to the relation between the first temperature difference value and the preset temperature threshold value, when the temperature difference value between the indoor environment temperature and the outdoor environment temperature is large, the working of the fresh air system is controlled, the temperature difference value is reduced by introducing fresh air, a compressor is not required to be always in an opening state, energy is saved, and when the air conditioner is in different operation modes, the fresh air is pre-cooled or preheated through the fresh air heat exchanger, so that the problem that a fresh air pipeline and indoor condensation are caused due to the large temperature difference value is avoided, and therefore the comfort of users is improved.
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 block diagram of an air conditioner according to an embodiment of the present invention;
fig. 2 is a system configuration diagram of an air conditioner according to an embodiment of the present invention;
fig. 3 is a flowchart of a control method of an air conditioner when the air conditioner is in a cooling operation according to an embodiment of the present invention;
fig. 4 is a flowchart of a control method of an air conditioner when the air conditioner is operated for heating according to an embodiment of the present invention;
fig. 5 is a flowchart of a control method of an air conditioner in self-cleaning of the air conditioner according to one embodiment of the present invention;
fig. 6 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention;
fig. 7 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention;
fig. 8 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention;
fig. 9 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention;
fig. 10 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention.
Reference numerals: an outdoor unit 10; a refrigerant circulation circuit 11; a compressor 12; a fresh air system 13; an indoor temperature sensor 14; an outdoor temperature sensor 15; a controller 16; a fresh air heat exchanger 101; a fresh air fan 102; a condenser 111; an electromagnetic expansion valve 112; an evaporator 113; a four-way valve 114; a fresh air duct 130.
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 heat is released to the surrounding environment through the condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.
The 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.
An air conditioner according to an embodiment of the present invention is described below with reference to fig. 1, and as shown in fig. 1, the air conditioner of the embodiment of the present invention includes: the outdoor unit 10, the refrigerant circulation circuit 11, the compressor 12, the fresh air system 13, the indoor temperature sensor 14, the outdoor temperature sensor 15, and the controller 16.
The outdoor unit 10 at least includes a fresh air heat exchanger 101 and a fresh air fan 102; the refrigerant circulation circuit 11 circulates the refrigerant in a circuit formed by the compressor 12, the condenser 111, the electromagnetic expansion valve 112, the evaporator 113, the four-way valve 114, and the pressure reducer;
the compressor 12 is configured to compress a low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure refrigerant gas and discharge the refrigerant gas to the condenser; the fresh air system 13 leads fresh air to pass through the fresh air pipeline 130 and introduces fresh air from the outdoor to the indoor under the action of the fresh air motor; the indoor temperature sensor 14 is used for acquiring indoor environment temperature; the outdoor temperature sensor 15 is used for acquiring outdoor environment temperature; the controller 16 is configured to: determining the current operation mode of the air conditioner, and acquiring the indoor environment temperature, the outdoor environment temperature and the set temperature of the air conditioner; calculating a first temperature difference value between the indoor environment temperature and the outdoor environment temperature; and controlling the working states of the fresh air heat exchanger and the fresh air system according to the relation between the first temperature difference value and at least one preset temperature threshold value.
Fig. 2 is a schematic diagram of a system structure of an air conditioner according to an embodiment of the present invention. When the air conditioner is used for cooling, a refrigeration cycle of the compressor is started, the indoor environment temperature and the outdoor environment temperature are obtained, the indoor environment temperature is recorded as T1 for example, the outdoor environment temperature is recorded as T4 for example, the temperature difference between the indoor environment temperature and the outdoor environment temperature is calculated, namely, the first temperature difference between T1 and T4 is recorded as T1-T4 for example, the relationship between the first temperature difference and a preset temperature threshold is compared, the working states of the fresh air ventilator and the fresh air system are controlled according to the relationship between the first temperature difference and at least one preset temperature threshold, for example, the self-cleaning function of the fresh air heat exchanger is controlled to be started, the sterilization and dust removal effects are achieved, the fresh air system is controlled to be started, fresh air is introduced from the outdoor, the indoor environment temperature is adjusted, the temperature difference between the indoor environment temperature and the outdoor environment temperature is reduced, condensation is prevented, and the indoor environment temperature is reduced by introducing fresh air, the compressor does not need to be controlled to be started all the time, the energy consumption is reduced, and the effect of saving the energy consumption is achieved.
The air conditioner is when heating, the compressor heats the circulation and starts, acquire indoor ambient temperature and outdoor ambient temperature, according to indoor ambient temperature and outdoor ambient temperature's first temperature difference, the operating condition of control new trend heat exchanger and new trend system, preheat the new trend in advance, reduce the difference between indoor ambient temperature and the outdoor ambient temperature, it is too big to avoid the difference in temperature between indoor ambient temperature and the outdoor ambient temperature, the new trend pipeline and the indoor condensation problem of bringing, improve user's travelling comfort.
According to the air conditioner provided by the embodiment of the invention, the working states of the fresh air heat exchanger and the fresh air system are controlled by determining the first temperature difference value of the indoor environment temperature and the outdoor environment temperature of the air conditioner in different operation modes and according to the relation between the first temperature difference value and the preset temperature threshold value, so that when the temperature difference value between the indoor environment temperature and the outdoor environment temperature is larger, the working of the fresh air system is controlled, the temperature difference value is reduced by introducing fresh air, the compressor is not required to be always in an open state, and the energy is saved.
In some embodiments, the controller is further configured to obtain a set temperature of the air conditioner, and when it is determined that the current operation mode of the air conditioner is the cooling mode, the controller is configured to control the working states of the fresh air heat exchanger and the fresh air system according to a relationship between the first temperature difference and at least one preset temperature threshold, specifically: when the first temperature difference value exceeds a first preset temperature threshold value, controlling the self-cleaning function of the fresh air heat exchanger to start, starting the compressor, controlling the fresh air system to start, and controlling the compressor to stop after the compressor starts for a first preset time so as to introduce fresh air from the outside through a fresh air pipeline; when the first temperature difference value is between a first preset temperature threshold value and a second preset temperature threshold value, controlling the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relation between the indoor environment temperature and the set temperature of the air conditioner; and when the first temperature difference value does not exceed a second preset temperature threshold value, controlling the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relation between the indoor environment temperature and the set temperature of the air conditioner, wherein the first preset temperature threshold value is greater than the second preset temperature threshold value.
In an embodiment, when the first temperature difference exceeds a first preset temperature threshold, for example, T1-T4 exceeds 15 ℃, it is considered that the temperature difference between the indoor environment temperature and the outdoor environment temperature is large, that is, the outdoor environment temperature is low, at this time, the electromagnetic expansion valve is controlled to be opened, the self-cleaning function of the fresh air heat exchanger is started, the compressor and the fresh air system are controlled to be opened, the compressor is controlled to be stopped after the compressor operates for a first preset time, for example, 15 minutes, and after the fresh air system is opened, fresh air with a low temperature is introduced from the outdoor environment due to the low outdoor environment temperature, so as to reduce the indoor environment temperature, and the compressor does not need to be in an open state all the time, so that energy conservation is high.
When the first temperature difference value is between the first preset temperature threshold value and the second preset temperature threshold value, for example, T1-T4 is between-5 ℃ and 15 ℃, the outdoor environment temperature is considered not to be very low, and the effect of reducing the indoor environment temperature is not very good only by introducing outdoor fresh air, at the moment, the relation between the first temperature difference value and the set temperature of the air conditioner is compared, and the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system are controlled according to the difference value between the first temperature difference value and the set temperature of the air conditioner, so that the indoor environment temperature is controlled.
And when the first temperature difference value does not exceed a second preset temperature threshold value, for example, T1-T4 does not exceed-5 ℃, the outdoor environment temperature is considered to be higher, at the moment, the relation between the first temperature difference value and the set temperature of the air conditioner is compared, and the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system are controlled according to the difference value between the first temperature difference value and the set temperature of the air conditioner, so that the indoor environment temperature is controlled.
In some embodiments, the controller is configured to control the operating states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relationship between the indoor ambient temperature and the air conditioner set temperature when the first temperature difference is between the first preset temperature threshold and the second preset temperature threshold, specifically: calculating a second temperature difference value between the indoor environment temperature and the set temperature of the air conditioner; when the second temperature difference value exceeds a third preset temperature threshold value, controlling an electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger, starting a compressor, controlling a fresh air system to be closed, and stopping introducing fresh air from the outdoor through a fresh air pipeline; when the second temperature difference value is between a fourth preset temperature threshold value and a third preset temperature threshold value, controlling an electromagnetic expansion valve to be opened, controlling a self-cleaning function of a fresh air heat exchanger to be started, starting a compressor, controlling a fresh air system to be opened, and introducing fresh air from the outdoor through a fresh air pipeline; and when the second temperature difference value does not exceed a fourth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be opened, starting the compressor, and after the compressor runs for a second preset time, controlling the fresh air system to be opened so as to introduce fresh air from the outdoor through a fresh air pipeline, wherein the third preset temperature threshold value is greater than the fourth preset temperature threshold value.
In an embodiment, when the first temperature difference is between the first preset temperature threshold and the second preset temperature threshold, i.e., T1-T4 is between-5 ℃ and 15 ℃, it is necessary to compare the relationship between the indoor ambient temperature and the air-conditioning set temperature, which is noted as Ts, for example.
Specifically, a second temperature difference value between the indoor environment temperature T1 and the air conditioner set temperature Ts is calculated and recorded as T1-Ts, the relation between the second temperature difference value and a preset temperature threshold value is compared, when the second temperature difference value exceeds a third preset temperature threshold value, for example, T1-Ts exceeds 8 ℃, the air conditioner set temperature is considered to be low, an electromagnetic expansion valve is controlled to be opened, the self-cleaning function of a fresh air heat exchanger is controlled to be started, a compressor is started, refrigeration is carried out by the compressor, a fresh air system is controlled to be closed, introduction of fresh air from the outdoor through a fresh air pipeline is stopped, so that the indoor environment problem is rapidly reduced, the fresh air heat exchanger is started to carry out indoor sterilization and dust removal, and the health of a user is guaranteed.
When the second temperature difference value is between the fourth preset temperature threshold value and the third preset temperature threshold value, for example, T1-Ts is between 1 ℃ and 8 ℃, controlling the electromagnetic expansion valve to open, controlling the self-cleaning function of the fresh air heat exchanger to open, starting the compressor, controlling the fresh air system to open, and introducing fresh air from the outside through the fresh air pipeline, it can be understood that when T1-Ts is between 1 ℃ and 8 ℃, the set temperature of the air conditioner is considered to be higher, that is, when the air conditioner operates in a refrigerating mode, the difference between the set temperature of the air conditioner and the indoor environment temperature is smaller, and the compressor is controlled to start, and the fresh air system is controlled to open, so that the indoor environment temperature is reduced to the set temperature of the air conditioner.
And when the second temperature difference value does not exceed a fourth preset temperature threshold value, for example, T1-Ts does not exceed 1 ℃, controlling an electromagnetic expansion valve to open, controlling a self-cleaning function of the fresh air heat exchanger to open, starting a compressor, controlling a fresh air system to open after the compressor runs for a second preset time, for example, 15 minutes, so as to introduce fresh air from the outside through a fresh air pipeline, and controlling the fresh air system to open after the compressor runs for the second preset time due to the lower set temperature of the air conditioner, so as to introduce fresh air from the outside through the fresh air pipeline, so as to reduce the indoor environment temperature.
In some embodiments, the controller is configured to control the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to a relationship between the indoor ambient temperature and the air conditioner set temperature when the first temperature difference does not exceed the second preset temperature threshold, specifically: calculating a second temperature difference value between the indoor environment temperature and the set temperature of the air conditioner; when the second temperature difference value does not exceed a fifth preset temperature threshold value, controlling an electromagnetic expansion valve to be opened, controlling a self-cleaning function of the fresh air heat exchanger to be started, starting a compressor, and controlling a fresh air system to be started so as to introduce fresh air from the outdoor through a fresh air pipeline; and when the second temperature difference value exceeds a fifth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be opened, starting the compressor, and controlling the fresh air system to be opened after a third preset time so as to introduce fresh air from the outdoor through the fresh air pipeline.
In an embodiment, when the first temperature difference value does not exceed a second preset temperature threshold value, for example, T1-T4 does not exceed-5 ℃, a second temperature difference value of the indoor environment temperature and the set temperature of the air conditioner is calculated, for example, a difference value of T1-Ts is calculated, and the working states of the indoor heat exchanger and the fresh air system are controlled according to the relation between the difference value of T1-Ts and the preset temperature threshold value.
For example, when the second temperature difference does not exceed the fifth preset temperature threshold, for example, the second temperature difference does not exceed 8 ℃, the electromagnetic expansion valve is controlled to be opened, the self-cleaning function of the fresh air heat exchanger is controlled to be started, the compressor is started, the fresh air system is controlled to be opened, and fresh air is introduced from the outdoor through the fresh air pipeline, so that the indoor environment temperature is reduced.
And when the second temperature difference exceeds a fifth preset temperature threshold value, for example, the second temperature difference exceeds 8 ℃, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, and controlling the fresh air system to be started after a third preset time, for example, 20 minutes, so as to introduce fresh air from the outdoor through the fresh air pipeline and reduce the indoor environment temperature. It can be understood that the fresh air system comprises a fresh air fan, a fresh air motor and a fresh air pipeline, fresh air in the outdoor environment is introduced from the outdoor through the fresh air pipeline under the action of the fresh air motor, and indoor mixed air can be discharged from the outdoor through the micro-positive pressure.
For example, as shown in fig. 3, a flowchart of a control method of an air conditioner during a cooling operation of the air conditioner according to an embodiment of the present invention is shown.
In step S11, the air conditioner operates a cooling mode.
In step S12, the compressor is started.
And step S13, acquiring the indoor environment temperature, the outdoor environment temperature and the air conditioner set temperature.
In step S14, a first temperature difference between the indoor ambient temperature and the outdoor ambient temperature is calculated.
In step S15, the first temperature difference exceeds a first preset temperature threshold.
And step S16, controlling the self-cleaning function of the fresh air heat exchanger to start, starting the compressor, controlling the fresh air system to start, and controlling the compressor to stop after the compressor is started for a first preset time.
In step S17, the first temperature difference is between the first preset temperature threshold and the second preset temperature threshold.
In step S18, a second temperature difference between the indoor ambient temperature and the air conditioner set temperature is calculated.
And step S19, when the second temperature difference value exceeds a third preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger, starting the compressor, and controlling the fresh air system to be closed.
And step S20, when the second temperature difference value is between the fourth preset temperature threshold value and the third preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, and controlling the fresh air system to be opened.
And step S21, when the second temperature difference value does not exceed a fourth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, and controlling the fresh air system to be started after the compressor runs for a second preset time.
In step S22, the first temperature difference does not exceed the second preset temperature threshold.
In step S23, a second temperature difference between the indoor ambient temperature and the air conditioner set temperature is calculated.
And step S24, when the second temperature difference value does not exceed a fifth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, and controlling the fresh air system to be started.
And step S25, when the second temperature difference value exceeds a fifth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, and controlling the fresh air system to be started after a third preset time.
In some embodiments, when it is determined that the current operation mode of the air conditioner is the heating mode, the controller is configured to control the working states of the fresh air heat exchanger and the fresh air system according to a relationship between the first temperature difference and at least one preset temperature threshold, specifically: when the first temperature difference value exceeds a sixth preset temperature threshold value, controlling an electromagnetic expansion valve to be opened, and controlling a fresh air system to be opened so as to heat fresh air introduced from a fresh air pipeline by adopting a fresh air heat exchanger; and when the first temperature difference value does not exceed a sixth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, and controlling the fresh air system to be opened so as to introduce fresh air with lower temperature from the outdoor through the fresh air pipeline and increase the humidity of the indoor ambient air.
In the embodiment, when the air conditioner is in heating operation, the compressor heating cycle is started, the magnitude relation between the first temperature difference value and the preset temperature threshold value is compared, when the first temperature difference value exceeds the sixth preset temperature threshold value, the electromagnetic expansion valve is controlled to be opened, the fresh air system is controlled to be opened, the fresh air heat exchanger is adopted, the fresh air with lower temperature introduced from the fresh air pipeline is heated, the fresh air entering the room is preheated in advance, the temperature difference between the indoor environment temperature and the outdoor environment temperature is reduced, condensation caused when indoor hot air meets objects cooled by the outdoor fresh air is avoided, and the comfort of a user is improved.
When the first temperature difference value does not exceed the sixth preset temperature threshold value, the electromagnetic expansion valve is controlled to be opened, the fresh air system is controlled to be opened, fresh air with lower temperature is introduced from the outdoor through the fresh air pipeline, the humidity of indoor ambient air is increased, the effect of anhydrous humidification is achieved through introducing outdoor fresh air, and the comfort of a user is improved.
For example, as shown in fig. 4, it is a flowchart of a control method of an air conditioner during a heating operation of the air conditioner according to an embodiment of the present invention.
In step S30, the air conditioner operates in a heating mode.
In step S31, the compressor is started.
In step S32, an indoor ambient temperature and an outdoor ambient temperature are acquired.
Step S33, determining whether the indoor ambient temperature and the outdoor ambient temperature exceed a sixth preset temperature threshold, if yes, performing step S34, otherwise, performing step S35.
And step S34, controlling the electromagnetic expansion valve to be opened, and controlling the fresh air system to be opened so as to heat fresh air introduced from the fresh air pipeline at a lower temperature by adopting the fresh air heat exchanger.
And step S35, controlling the electromagnetic expansion valve to be opened, and controlling the fresh air system to be opened so as to introduce fresh air with lower temperature from the outdoor through the fresh air pipeline and increase the humidity of the indoor ambient air.
In some embodiments, the controller is configured to: the self-cleaning function of the fresh air heat exchanger is controlled to be started, and the method specifically comprises the following steps: control compressor and electromagnetic expansion valve and open, control new trend fan repeated execution and preset the action, preset the action and include: and controlling the fresh air fan to operate for a third preset time and then stopping for a fourth preset time so that the fresh air heat exchanger is cleaned in the frosting and defrosting processes.
In the embodiment, when the air conditioner operates in a refrigerating mode, the compressor and the electromagnetic expansion valve are controlled to be opened, the fresh air fan operates for a second preset time, for example, operates for 3 minutes, then stops for a fourth preset time, for example, stops for 7 minutes, and is repeatedly executed, so that the fresh air fan utilizes the fresh air heat exchanger to generate condensed water to clean in the frosting and defrosting process, and accordingly air dust filtering and sterilization effects are achieved.
For example, as shown in fig. 5, it is a flowchart of a control method of an air conditioner during self-cleaning of the air conditioner according to an embodiment of the present invention.
In step S40, the air conditioner operates in a cooling mode.
In step S41, the compressor and the solenoid expansion valve are opened.
And step S42, the fresh air fan operates for a third preset time.
And step S43, stopping the fresh air fan for a fourth preset time.
And step S44, controlling the fresh air fan to repeatedly execute the actions.
According to the air conditioner provided by the embodiment of the invention, the working states of the fresh air heat exchanger and the fresh air system are controlled by determining the first temperature difference value of the indoor environment temperature and the outdoor environment temperature of the air conditioner in different operation modes and according to the relation between the first temperature difference value and the preset temperature threshold value, so that when the temperature difference value between the indoor environment temperature and the outdoor environment temperature is larger, the working of the fresh air system is controlled, the temperature difference value is reduced by introducing fresh air, the compressor is not required to be always in an open state, and the energy is saved.
A control method of an air conditioner according to an embodiment of the present invention is described below.
As shown in fig. 6, the operation method of the air conditioner according to the embodiment of the present invention at least includes steps S1 to S13.
Step S1, determining the current operation mode of the air conditioner, and acquiring the indoor ambient temperature and the outdoor ambient temperature.
In the embodiment, when the air conditioner is used for cooling, the compressor refrigeration cycle is started, and an indoor environment temperature and an outdoor environment temperature are obtained, wherein the indoor environment temperature is recorded as T1 for example, and the outdoor environment temperature is recorded as T4 for example.
In step S2, a first temperature difference between the indoor ambient temperature and the outdoor ambient temperature is calculated.
In an embodiment, a temperature difference between the indoor ambient temperature and the outdoor ambient temperature, i.e., a first temperature difference between T1 and T4, is calculated, e.g., noted as T1-T4.
And step S3, controlling the working states of the fresh air heat exchanger and the fresh air system according to the relation between the first temperature difference value and at least one preset temperature threshold value.
In an embodiment, the relationship between the first temperature difference and the preset temperature threshold is compared, and according to the relationship between the first temperature difference and at least one preset temperature threshold, the working states of the fresh air ventilator and the fresh air system are controlled, for example, the self-cleaning function of the fresh air heat exchanger is controlled to be started, the sterilization and dust removal effects are achieved, the fresh air system is controlled to be started, fresh air is introduced from the outdoor, the indoor environment temperature is adjusted, the temperature difference between the indoor environment temperature and the outdoor environment temperature is reduced, condensation is prevented from being generated, the indoor environment temperature is reduced by introducing the fresh air, the compressor is not required to be controlled to be started all the time, the energy consumption is reduced, and the energy consumption saving effect is achieved.
According to the control method of the air conditioner, the first temperature difference value of the indoor environment temperature and the outdoor environment temperature of the air conditioner in different operation modes is determined, the working states of the fresh air heat exchanger and the fresh air system are controlled according to the relation between the first temperature difference value and the preset temperature threshold value, when the temperature difference value between the indoor environment temperature and the outdoor environment temperature is large, the working of the fresh air system is controlled, the temperature difference value is reduced by introducing fresh air, a compressor is not required to be always in an opening state, energy is saved, and when the air conditioner is in different operation modes, the fresh air is pre-cooled or preheated through the fresh air heat exchanger, so that the problem that a fresh air pipeline and indoor condensation are caused due to the large temperature difference value is avoided, and therefore the comfort of users is improved.
In some embodiments, as shown in fig. 7, a flowchart of a control method of an air conditioner according to an embodiment of the present invention is shown. Acquiring the set temperature of the air conditioner, and controlling the working state of the fresh air heat exchanger and the fresh air system according to the relation between the first temperature difference value and at least one preset temperature threshold value when determining that the current operation mode of the air conditioner is the refrigeration mode, wherein the working state comprises the following steps: when the first temperature difference value exceeds a first preset temperature threshold value, controlling the self-cleaning function of the fresh air heat exchanger to start, starting the compressor, controlling the fresh air system to start, and controlling the compressor to stop after the compressor is started for a first preset time so as to introduce fresh air from the outdoor through a fresh air pipeline; when the first temperature difference value is between a first preset temperature threshold value and a second preset temperature threshold value, controlling the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relation between the indoor environment temperature and the set temperature of the air conditioner; and when the first temperature difference value does not exceed a second preset temperature threshold value, controlling the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relation between the indoor environment temperature and the set temperature of the air conditioner, wherein the first preset temperature threshold value is greater than the second preset temperature threshold value.
In some embodiments, as shown in fig. 8, a flowchart of a control method of an air conditioner according to an embodiment of the present invention is shown. When the first temperature difference value is between first preset temperature threshold value and second preset temperature threshold value, according to the relation between indoor ambient temperature and the air conditioner settlement temperature, control electromagnetic expansion valve, new trend heat exchanger and new trend operating condition of system, include: calculating a second temperature difference value between the indoor environment temperature and the set temperature of the air conditioner; when the second temperature difference value exceeds a third preset temperature threshold value, controlling an electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger, starting a compressor, controlling a fresh air system to be closed, and stopping introducing fresh air from the outdoor through a fresh air pipeline; when the second temperature difference value is between a fourth preset temperature threshold value and a third preset temperature threshold value, controlling an electromagnetic expansion valve to be opened, controlling a self-cleaning function of a fresh air heat exchanger to be started, starting a compressor, controlling a fresh air system to be opened, and introducing fresh air from the outdoor through a fresh air pipeline; and when the second temperature difference value does not exceed a fourth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be opened, starting the compressor, and after the compressor runs for a second preset time, controlling the fresh air system to be opened so as to introduce fresh air from the outdoor through a fresh air pipeline, wherein the third preset temperature threshold value is greater than the fourth preset temperature threshold value.
In some embodiments, as shown in fig. 9, a flowchart of a control method of an air conditioner according to an embodiment of the present invention is shown. When first temperature difference exceeded first preset temperature threshold value, control fresh air heat exchanger's self-cleaning function started to start the compressor, and control the fresh air system and open, start first preset time at the compressor after, control the compressor and shut down, in order to introduce the new trend from outdoor through the new trend pipeline, include: calculating a second temperature difference value between the indoor environment temperature and the set temperature of the air conditioner; when the second temperature difference value does not exceed a fifth preset temperature threshold value, controlling an electromagnetic expansion valve to be opened, controlling a self-cleaning function of the fresh air heat exchanger to be started, starting a compressor, and controlling a fresh air system to be started so as to introduce fresh air from the outdoor through a fresh air pipeline; and when the second temperature difference value exceeds a fifth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be opened, starting the compressor, and controlling the fresh air system to be opened after a third preset time so as to introduce fresh air from the outdoor through the fresh air pipeline.
In some embodiments, as shown in fig. 10, a flowchart of a control method of an air conditioner according to an embodiment of the present invention is shown. When the current operation mode of the air conditioner is determined to be a heating mode, when the first temperature difference value exceeds a sixth preset temperature threshold value, the electromagnetic expansion valve is controlled to be opened, and a fresh air system is controlled to be opened, so that fresh air introduced from a fresh air pipeline is heated by adopting a fresh air heat exchanger; and when the first temperature difference value does not exceed a sixth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, and controlling the fresh air system to be opened so as to introduce fresh air with lower temperature from the outdoor through a fresh air pipeline and increase the humidity of indoor ambient air.
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 outdoor unit at least comprises a fresh air heat exchanger and a fresh air fan;
the refrigerant circulation loop is used for circulating the refrigerant in a loop consisting of the compressor, the condenser, the electromagnetic expansion valve, the evaporator, the four-way valve and the pressure reducer;
the compressor is used for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharging the high-temperature and high-pressure refrigerant gas to the condenser;
the fresh air system leads fresh air to pass through a fresh air pipeline and leads the fresh air from the outdoor to the indoor under the action of a fresh air motor;
the indoor temperature sensor is used for acquiring the indoor environment temperature;
the outdoor temperature sensor is used for acquiring outdoor environment temperature;
the controller is configured to: determining the current operation mode of the air conditioner, and acquiring the indoor environment temperature and the outdoor environment temperature;
calculating a first temperature difference between the indoor ambient temperature and the outdoor ambient temperature;
and controlling the working states of the fresh air heat exchanger and the fresh air system according to the relation between the first temperature difference value and at least one preset temperature threshold value.
2. The air conditioner according to claim 1, wherein the controller is further configured to obtain a set temperature of the air conditioner, and when it is determined that the current operation mode of the air conditioner is the cooling mode, the controller is configured to control the operating states of the fresh air heat exchanger and the fresh air system according to a relationship between the first temperature difference and at least one preset temperature threshold, specifically:
when the first temperature difference value exceeds a first preset temperature threshold value, controlling the starting of a self-cleaning function of the fresh air heat exchanger, starting the compressor, controlling the starting of the fresh air system, and controlling the shutdown of the compressor after the compressor is started for a first preset time so as to introduce fresh air from the outside through the fresh air pipeline;
when the first temperature difference value is between the first preset temperature threshold value and the second preset temperature threshold value, controlling the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relation between the indoor environment temperature and the set temperature of the air conditioner;
and when the first temperature difference value does not exceed the second preset temperature threshold value, controlling the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relation between the indoor environment temperature and the set temperature of the air conditioner, wherein the first preset temperature threshold value is greater than the second preset temperature threshold value.
3. The air conditioner according to claim 2, wherein the controller is configured to control the operating states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relationship between the indoor ambient temperature and the air conditioner set temperature when the first temperature difference is between the first preset temperature threshold and the second preset temperature threshold, specifically:
calculating a second temperature difference value between the indoor environment temperature and the set temperature of the air conditioner;
when the second temperature difference value exceeds a third preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger, starting the compressor, controlling the fresh air system to be closed, and stopping introducing fresh air from the outdoor through the fresh air pipeline;
when the second temperature difference value is between the fourth preset temperature threshold value and the third preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, controlling the fresh air system to be opened, and introducing fresh air from the outside through the fresh air pipeline;
and when the second temperature difference value does not exceed the fourth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, and controlling the fresh air system to be started after the compressor runs for a second preset time so as to introduce fresh air from the outside through the fresh air pipeline, wherein the third preset temperature threshold value is greater than the fourth preset temperature threshold value.
4. The air conditioner according to claim 2, wherein the controller is configured to control the operation states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relationship between the indoor ambient temperature and the air conditioner set temperature when the first temperature difference does not exceed the second preset temperature threshold, specifically:
calculating a second temperature difference value between the indoor environment temperature and the set temperature of the air conditioner;
when the second temperature difference value does not exceed a fifth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, and controlling the fresh air system to be started so as to introduce fresh air from the outdoor through the fresh air pipeline;
and when the second temperature difference value exceeds a fifth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, and controlling a fresh air system to be started after a third preset time so as to introduce fresh air from the outdoor through the fresh air pipeline.
5. The air conditioner according to claim 1, wherein when it is determined that the current operation mode of the air conditioner is the heating mode, the controller is configured to control the operating states of the fresh air heat exchanger and the fresh air system according to a relationship between the first temperature difference and at least one preset temperature threshold, specifically:
when the first temperature difference value exceeds a sixth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, and controlling the fresh air system to be opened so as to heat fresh air introduced from the fresh air pipeline by using the fresh air heat exchanger, wherein the temperature of the fresh air is lower than that of the fresh air pipeline;
and when the first temperature difference value does not exceed the sixth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, and controlling the fresh air system to be opened so as to introduce fresh air with lower temperature from the outdoor through the fresh air pipeline and increase the humidity of indoor ambient air.
6. The air conditioner according to any one of claims 1 to 5, wherein the controller is configured to:
controlling the self-cleaning function of the fresh air heat exchanger to be started, and specifically comprising the following steps: controlling the compressor and the electromagnetic expansion valve to be opened, and controlling the fresh air fan to repeatedly execute preset actions, wherein the preset actions comprise: and controlling the fresh air fan to operate for a third preset time and then stopping for a fourth preset time so that the fresh air heat exchanger is cleaned in the frosting and defrosting processes.
7. A method of controlling an air conditioner, comprising:
determining the current operation mode of the air conditioner, and acquiring the indoor environment temperature and the outdoor environment temperature;
calculating a first temperature difference value between the indoor environment temperature and the outdoor environment temperature;
and controlling the working states of the fresh air heat exchanger and the fresh air system according to the relation between the first temperature difference value and at least one preset temperature threshold value.
8. The method for controlling the air conditioner according to claim 7, wherein the step of obtaining the set temperature of the air conditioner, and controlling the working states of the fresh air heat exchanger and the fresh air system according to the relationship between the first temperature difference and at least one preset temperature threshold when the current operation mode of the air conditioner is determined to be the cooling mode comprises the steps of:
when the first temperature difference value exceeds a first preset temperature threshold value, controlling the self-cleaning function of the fresh air heat exchanger to start, starting the compressor, controlling the fresh air system to start, and controlling the compressor to stop after the compressor is started for a first preset time so as to introduce fresh air from the outside through the fresh air pipeline;
when the first temperature difference value is between the first preset temperature threshold value and the second preset temperature threshold value, controlling the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relation between the indoor environment temperature and the set temperature of the air conditioner;
and when the first temperature difference value does not exceed the second preset temperature threshold value, controlling the working states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relation between the indoor environment temperature and the set temperature of the air conditioner, wherein the first preset temperature threshold value is greater than the second preset temperature threshold value.
9. The method of claim 8, wherein when the first temperature difference is between the first preset temperature threshold and the second preset temperature threshold, controlling the operating states of the electromagnetic expansion valve, the fresh air heat exchanger and the fresh air system according to the relationship between the indoor ambient temperature and the set temperature of the air conditioner comprises:
calculating a second temperature difference value between the indoor environment temperature and the set temperature of the air conditioner;
when the second temperature difference value exceeds a third preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger, starting the compressor, controlling the fresh air system to be closed, and stopping introducing fresh air from the outdoor through the fresh air pipeline;
when the second temperature difference value is between the fourth preset temperature threshold value and the third preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, controlling the fresh air system to be opened, and introducing fresh air from the outdoor through the fresh air pipeline;
and when the second temperature difference value does not exceed the fourth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, and controlling the fresh air system to be started after the compressor runs for a second preset time so as to introduce fresh air from the outside through the fresh air pipeline, wherein the third preset temperature threshold value is greater than the fourth preset temperature threshold value.
10. The method as claimed in claim 8, wherein when the first temperature difference exceeds a first preset temperature threshold, controlling the self-cleaning function of the fresh air heat exchanger to start and the compressor to start, and controlling the fresh air system to start, and after the compressor starts for a first preset time, controlling the compressor to stop to introduce fresh air from the outdoor through the fresh air pipeline, comprises:
calculating a second temperature difference value between the indoor environment temperature and the set temperature of the air conditioner;
when the second temperature difference value does not exceed a fifth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, and controlling the fresh air system to be started so as to introduce fresh air from the outdoor through the fresh air pipeline;
and when the second temperature difference value exceeds a fifth preset temperature threshold value, controlling the electromagnetic expansion valve to be opened, controlling the self-cleaning function of the fresh air heat exchanger to be started, starting the compressor, and controlling a fresh air system to be started after a third preset time so as to introduce fresh air from the outdoor through the fresh air pipeline.
CN202210427402.4A 2022-04-22 2022-04-22 Air conditioner and control method thereof Active CN114811876B (en)

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