CN110671777A - Control method and device of air conditioner and air conditioner - Google Patents
Control method and device of air conditioner and air conditioner Download PDFInfo
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- CN110671777A CN110671777A CN201910998169.3A CN201910998169A CN110671777A CN 110671777 A CN110671777 A CN 110671777A CN 201910998169 A CN201910998169 A CN 201910998169A CN 110671777 A CN110671777 A CN 110671777A
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—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
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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
- F24F11/70—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
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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
- F24F11/70—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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Abstract
The invention relates to the technical field of air conditioners, in particular to a control method and device of an air conditioner and the air conditioner. The control method of the air conditioner comprises the following steps: detecting the air outlet temperature of the air outlets corresponding to all the indoor heat exchangers; adjusting the opening of an electronic expansion valve according to the operation mode of the air conditioner and the air outlet temperature, and detecting the coil temperature of all the indoor heat exchangers; and adjusting the frequency of the compressor according to the temperature of the coil pipe and the opening degree of the electronic expansion valve. From this, monitor air-out temperature in real time to in time adjust electronic expansion valve's aperture, thereby guarantee this air-out temperature control's accuracy nature, and monitor through to heat exchanger coil pipe temperature, so that in time adjust the compressor, and carry out feedback control to air-out temperature, when guaranteeing each air-out temperature, it is more energy-conserving.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and device of an air conditioner and the air conditioner.
Background
Currently, in order to meet daily needs of consumers, an air conditioner is usually set at a temperature by the consumers, but the set temperature is often single and cannot be met by different users. Currently, the design of the air conditioner with multiple outlet air temperatures causes the energy consumption of the air conditioner to be too high due to unreasonable control method.
Disclosure of Invention
Aiming at solving the problems, the invention provides a control method of an air conditioner with multiple air outlet temperatures, so that the air conditioner can provide multiple air outlet temperatures at the same time, and the energy consumption is lower.
In order to solve the above problems, the present invention provides a method for controlling an air conditioner, comprising:
detecting the air outlet temperature of the air outlets corresponding to all the indoor heat exchangers;
adjusting the opening degree of the electronic expansion valve according to the operation mode of the air conditioner and the air outlet temperature;
detecting the coil temperature of all the indoor heat exchangers;
and adjusting the frequency of the compressor according to the temperature of the coil pipe and the opening degree of the electronic expansion valve.
From this, monitor air-out temperature in real time to in time adjust electronic expansion valve's aperture, thereby guarantee this air-out temperature control's accuracy nature, and monitor through to heat exchanger coil pipe temperature, so that in time adjust the compressor, and carry out feedback control to air-out temperature, when guaranteeing each air-out temperature, it is more energy-conserving.
Optionally, the adjusting the opening degree of the electronic expansion valve according to the operation mode of the air conditioner and the outlet air temperature includes:
when the operation mode of the air conditioner is a cooling mode: when the first outlet air temperature is higher than a first set temperature, the opening degree of the first electronic expansion valve is increased; when the first outlet air temperature is lower than the first set temperature, the opening degree of the first electronic expansion valve is reduced; when the first outlet air temperature is equal to the first set temperature, keeping the opening degree of the first electronic expansion valve unchanged; the first outlet air temperature is the temperature of an air outlet corresponding to the first indoor heat exchanger, and the first electronic expansion valve is connected with the first indoor heat exchanger.
Therefore, when the first outlet air temperature is higher than the first set temperature, the opening degree of the first electronic expansion valve is increased, so that the flow of the refrigerant can be increased, the refrigeration is accelerated, and the response is timely carried out; when the first outlet air temperature is lower than the first set temperature, the opening degree of the first electronic expansion valve is reduced, the flow of a refrigerant is reduced, refrigeration is slowed down, and an energy-saving effect is achieved; when the first outlet air temperature is equal to the first set temperature, the opening degree of the first electronic expansion valve is kept unchanged, and therefore good outlet air experience is kept.
Optionally, the adjusting the opening degree of the electronic expansion valve according to the operation mode of the air conditioner and the outlet air temperature includes:
when the operation mode of the air conditioner is a heating mode: when the first outlet air temperature is higher than the second set temperature, the opening degree of the first electronic expansion valve is reduced; when the first outlet air temperature is lower than the second set temperature, the opening degree of the first electronic expansion valve is increased; when the first outlet air temperature is equal to the second set temperature, keeping the opening degree of the first electronic expansion valve unchanged; the first outlet air temperature is the temperature of an air outlet corresponding to the first indoor heat exchanger, and the first electronic expansion valve is connected with the first indoor heat exchanger.
Therefore, when the first outlet air temperature is higher than the third set temperature, the opening degree of the first electronic expansion valve is reduced, so that the flow of the refrigerant can be reduced, the heating is slowed down, and the energy-saving effect is achieved; when the first outlet air temperature is lower than the third set temperature, the opening degree of the first electronic expansion valve is increased, the flow of a refrigerant is increased, heating is accelerated, and response is timely carried out; and when the first air outlet temperature is equal to the third set temperature, keeping the opening degree of the first electronic expansion valve unchanged, thereby keeping better air outlet experience.
Optionally, the adjusting the frequency of the compressor according to the coil temperature and the opening degree of the electronic expansion valve includes:
when the operation mode of the air conditioner is a cooling mode:
when the temperature of a coil pipe of the first indoor heat exchanger is in a first temperature interval and the opening degree of the first electronic expansion valve is in a first opening degree interval, increasing the frequency of the compressor; the first indoor heat exchanger is any one of a plurality of indoor heat exchangers in an indoor unit, and the first electronic expansion valve is connected with the first indoor heat exchanger;
when the temperatures of the coil pipes of all the indoor heat exchangers are in a second temperature interval and the opening degree of the first electronic expansion valve is in a second opening degree interval, keeping the frequency of the compressor unchanged;
when the temperature of the coil of the first indoor heat exchanger is in a third temperature interval, adjusting the frequency of the compressor according to the change of the temperature of the coil of the first indoor heat exchanger;
any temperature value in the first temperature interval is larger than any temperature value in the second temperature interval, any temperature value in the second temperature interval is larger than any temperature value in the third temperature interval, and any opening value in the first opening interval is larger than any opening value in the second opening interval.
Therefore, the air outlet temperature is adjusted in time through adjustment of the compressor, and further adjustment of the refrigeration system can be realized on the basis of adjustment of the electronic expansion valve.
Optionally, the adjusting the frequency of the compressor according to the change of the coil temperature of the first indoor heat exchanger comprises:
controlling the compressor to keep the current frequency running for a first set time;
and detecting the temperature of the coil of the first indoor heat exchanger, and reducing the frequency of the compressor if the temperature of the coil of the first indoor heat exchanger is still in a third temperature interval.
Therefore, the compressor firstly keeps the current operation frequency for a set time, so that the first electronic expansion valve and the second electronic expansion valve can be adjusted in a sufficient time. Meanwhile, misjudgment of surplus capacity of the compressor can be avoided, the power of the compressor can be reduced on the basis of ensuring the refrigeration effect, and the energy-saving effect is achieved.
Optionally, the adjusting the frequency of the compressor according to the coil temperature and the opening degree of the electronic expansion valve includes:
when the operation mode of the air conditioner is a heating mode:
when the temperature of the coil pipe of the first indoor heat exchanger is in a fourth temperature interval and the opening degree of the first electronic expansion valve is larger than or equal to a third set opening degree, increasing the frequency of the compressor; the first indoor heat exchanger is any one of a plurality of indoor heat exchangers in an indoor unit, and the first electronic expansion valve is connected with the first indoor heat exchanger;
when the temperatures of the coil pipes of all the indoor heat exchangers are in a fifth temperature interval and the opening degree of the first electronic expansion valve is greater than or equal to a fourth set opening degree, keeping the frequency of the compressor unchanged;
when the temperature of the coil of the first indoor heat exchanger is in a sixth temperature interval, adjusting the frequency of the compressor according to the change of the temperature of the coil of the first indoor heat exchanger;
any temperature value in the sixth temperature interval is larger than any temperature value in the fifth temperature interval, any temperature value in the fifth temperature interval is larger than any temperature value in the fourth temperature interval, and the third set opening degree is larger than the fourth set opening degree.
Therefore, the air outlet temperature is adjusted in time through adjustment of the compressor, and further adjustment of the heating system can be realized on the basis of adjustment of the electronic expansion valve.
Optionally, the adjusting the frequency of the compressor according to the change of the coil temperature of the first indoor heat exchanger comprises:
controlling the compressor to keep the current frequency running for a second set time;
and detecting the temperature of the coil of the first indoor heat exchanger, and reducing the frequency of the compressor if the temperature of the coil of the first indoor heat exchanger is still in the sixth temperature interval.
Therefore, the compressor firstly keeps the current operation frequency for a set time, so that the first electronic expansion valve and the second electronic expansion valve can be adjusted in a sufficient time. Meanwhile, misjudgment of surplus capacity of the compressor can be avoided, the power of the compressor can be reduced on the basis of ensuring the heating effect, and the energy-saving effect is achieved.
The present invention also provides a control apparatus of an air conditioner, comprising:
the detection unit is used for detecting the air outlet temperature of the air outlets corresponding to all the indoor heat exchangers and the coil temperature of all the indoor heat exchangers;
a control unit for adjusting the opening degree of the electronic expansion valve according to the operation mode of the air conditioner and the outlet air temperature,
the control unit is also used for adjusting the frequency of the compressor according to the temperature of the coil pipe and the opening degree of the electronic expansion valve.
The control device of the air conditioner and the control method of the air conditioner have the same beneficial effects, and are not repeated herein.
The invention also provides an air conditioner, which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium is used for storing a computer program, and the computer program is read by the processor and runs to realize the control method of the air conditioner.
Optionally, the detection unit includes a plurality of temperature sensors, and the temperature sensors are disposed at each air outlet of the indoor unit and at the coil of each indoor heat exchanger.
The air conditioner has the same beneficial effects as the control device of the air conditioner, and the description is omitted.
Drawings
FIG. 1 is a schematic diagram of the air conditioner according to the embodiment of the present invention;
FIG. 2 is a flowchart illustrating a method for controlling an air conditioner according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a control device of an air conditioner according to an embodiment of the present invention.
Description of reference numerals:
the system comprises a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, a throttling device 4, an indoor unit 5, an indoor heat exchanger 6, a fan 7, a second temperature sensor 8, a first temperature sensor 9, an electronic expansion valve 10, a detection unit 11 and a control unit 12.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In addition, all directions or positional relationships mentioned in the embodiments of the present invention are positional relationships based on the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not imply or imply that the referred device or element must have a specific orientation, and are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified. "first," "second," etc. do not denote any particular quantity, but rather are merely used for convenience of distinction and description.
In order to meet the design of different outlet air temperatures, as shown in fig. 1, a plurality of mutually independent indoor heat exchangers 6 are often arranged in an air-conditioning indoor unit 5, an electronic expansion valve 10 which is mutually independent is arranged at a refrigerant inlet of each indoor heat exchanger, and meanwhile, a plurality of air outlets are also arranged in the indoor unit, and the position of each air outlet corresponds to the position of the indoor heat exchanger 6. In addition, different fans 7 are arranged at corresponding positions of each indoor heat exchanger, and only one fan can be provided. The air outlet temperature of the corresponding air outlet is controlled through different indoor heat exchangers 6, so that the design of multiple air outlet temperatures is realized. Generally, with regard to the design of multiple air outlet temperatures of multiple air outlets, when the operation condition of an air conditioner changes, if only the air conditioning method of a traditional single refrigeration system is relied on, the whole refrigeration system cannot be adjusted in time when the operation condition of the air conditioner changes, so that the phenomenon of pseudo multiple air outlet temperatures is caused in a long time.
When the air conditioner performs refrigeration, a high-temperature and high-pressure gaseous refrigerant discharged by the compressor 1 firstly flows to the outdoor heat exchanger 3 through the four-way valve 2, is condensed into a liquid refrigerant, flows to each individual electronic expansion valve 10 after passing through the throttling device 4, then flows to the indoor heat exchanger 6, absorbs indoor heat, gasifies the liquid refrigerant, forms a gaseous refrigerant, and returns to an air suction port of the compressor 1 through the four-way valve 2.
When the air conditioner heats, the high-temperature and high-pressure gaseous refrigerant discharged by the compressor 1 firstly flows to the indoor heat exchanger 6 through the four-way valve 2, the gaseous refrigerant is condensed into liquid refrigerant, the refrigerant flows to each individual electronic expansion valve 10, passes through the throttling device 4, then flows to the indoor heat exchanger 6, the liquid refrigerant is gasified to form gaseous refrigerant, and the gaseous refrigerant returns to the air suction port of the compressor 1 through the four-way valve 2.
In the embodiment of the present invention, as shown in fig. 1, a first temperature sensor 9 is correspondingly disposed at a coil of each indoor heat exchanger 6 to detect the temperature of the coil of the indoor heat exchanger 6, and a second temperature sensor 8 is correspondingly disposed at each air outlet to detect the air outlet temperature of the air outlet.
An embodiment of the present invention provides a control method of an air conditioner, as shown in fig. 2, including:
s1: detecting the air outlet temperature of the air outlets corresponding to all the indoor heat exchangers 6;
s2: adjusting the opening degree of the electronic expansion valve 10 according to the operation mode of the air conditioner and the air outlet temperature;
s3: detecting the coil temperature of all the indoor heat exchangers 6;
s4: and adjusting the frequency of the compressor 1 according to the coil temperature and the opening degree of the electronic expansion valve 10.
In S1, the temperatures of all indoor heat exchangers 6 are detected in real time, each air outlet is provided with a corresponding second temperature sensor 8, the outlet air temperature is detected by the second temperature sensor 8 arranged at the air outlet, and all the outlet air temperatures of the air outlets need to be detected simultaneously. In S2, when a temperature anomaly is detected, the electronic expansion valve 10 is adjusted to control the flow rate of the refrigerant and further adjust the outlet air temperature, and the adjustment modes of the electronic expansion valve 10 are different in different modes. After the opening degree of the electronic expansion valve is changed, the coil temperature of the indoor heat exchanger 6 is detected in S3, but it is understood that the detection of the coil temperature is real-time detection, and only after the opening degree of the electronic expansion valve is changed, the coil temperature is acquired and used for the next operation, and whether the compressor 1 is overloaded or whether the capacity of the compressor 1 is surplus is determined according to the coil temperature in S4, and the frequency of the compressor 1 is adjusted.
The benefit that sets up like this lies in, monitors the air-out temperature in real time to in time adjust electronic expansion valve's aperture, thereby guarantee this air-out temperature control's accuracy nature, and monitor through to heat exchanger coil pipe temperature, so that in time adjust the compressor, and carry out feedback control to the air-out temperature, when guaranteeing each air-out temperature, it is more energy-conserving.
In step S2, the adjusting the opening degree of the electronic expansion valve 10 according to the operation mode of the air conditioner and the outlet air temperature includes:
when the operation mode of the air conditioner is a cooling mode: when the first outlet air temperature is higher than a first set temperature, the opening degree of the first electronic expansion valve is increased; when the first outlet air temperature is lower than the first set temperature, the opening degree of a first electronic expansion valve is reduced; when the first outlet air temperature is equal to the first set temperature, keeping the opening degree of the first electronic expansion valve unchanged; the first outlet air temperature is the temperature of an air outlet corresponding to the first indoor heat exchanger, and the first electronic expansion valve is connected with the first indoor heat exchanger.
That is, since the strategy for adjustment of the electronic expansion valve 10 is different in different modes, the adjustment of the electronic expansion valve in the cooling mode is mainly explained here. It should be noted that, the "first" is only for convenience of distinction and explanation, and is not particularly limited to a certain structure, because the indoor unit has a plurality of indoor heat exchangers, the first indoor heat exchanger may be any indoor heat exchanger, the first outlet air temperature is the temperature of the air outlet corresponding to the first indoor heat exchanger, and the first electronic expansion valve is an electronic expansion valve connected to the first indoor heat exchanger.
In an embodiment of the present invention, the indoor heat exchanger includes a first heat exchanger and a second heat exchanger, the electronic expansion valve includes a first electronic expansion valve and a second electronic expansion valve, the outlet air temperature includes a first outlet air temperature and a second outlet air temperature, where the first outlet air temperature and the second outlet air temperature respectively correspond to the temperatures of the first air outlet and the second air outlet, and the first electronic expansion valve and the second electronic expansion valve are respectively connected to the first heat exchanger and the second heat exchanger, where a first set temperature of the first air outlet is 20 ℃, a second set temperature of the second air outlet is 25 ℃, and when the first outlet air temperature is greater than 20 ℃, the opening degree of the first electronic expansion valve is increased; when the first outlet air temperature is lower than 20 ℃, reducing the opening degree of a first electronic expansion valve; and when the first outlet air temperature is equal to 20 ℃, keeping the opening degree of the first electronic expansion valve unchanged. For the second air outlet, when the second outlet air temperature is higher than 25 ℃, the opening degree of the second electronic expansion valve is increased; when the second outlet air temperature is lower than 25 ℃, reducing the opening degree of a second electronic expansion valve; and when the second outlet air temperature is equal to 25 ℃, keeping the opening degree of the second electronic expansion valve unchanged. That is to say, the air-out temperature of the first air outlet and the air-out temperature of the second air outlet are relatively independent.
When the first outlet air temperature is higher than the first set temperature, the opening degree of the first electronic expansion valve is increased, so that the flow of the refrigerant can be increased, the refrigeration is accelerated, and the response is timely performed; when the first outlet air temperature is lower than the first set temperature, the opening degree of the first electronic expansion valve is reduced, the flow of a refrigerant is reduced, refrigeration is slowed down, and an energy-saving effect is achieved; when the first outlet air temperature is equal to the first set temperature, the opening degree of the first electronic expansion valve is kept unchanged, and therefore good outlet air experience is kept.
Here, when increasing or decreasing the opening degree of the first electronic expansion valve, the first electronic expansion valve is adjusted at a set adjustment rate. In this embodiment, the adjustment rate of the first electronic expansion valve is 1 step per second, so as to ensure the stability of the system and avoid instability of the system caused by excessive adjustment due to too fast or too slow adjustment.
In step S2, the adjusting the opening degree of the electronic expansion valve according to the operation mode of the air conditioner and the outlet air temperature includes:
when the operation mode of the air conditioner is a heating mode: when the first outlet air temperature is higher than the third set temperature, the opening degree of the first electronic expansion valve is reduced; when the first outlet air temperature is lower than the third set temperature, the opening degree of the first electronic expansion valve is increased; when the first outlet air temperature is equal to the third set temperature, keeping the opening degree of the first electronic expansion valve unchanged; the first outlet air temperature is the temperature of an air outlet corresponding to the first indoor heat exchanger, and the first electronic expansion valve is connected with the first indoor heat exchanger.
In the embodiment of the invention, the first set temperature of the first air outlet is 16 ℃, the second set temperature of the second air outlet is 20 ℃, and when the first outlet air temperature is higher than 16 ℃, the opening degree of the first electronic expansion valve is increased; when the first outlet air temperature is lower than 16 ℃, reducing the opening degree of a first electronic expansion valve; and when the first outlet air temperature is equal to 16 ℃, keeping the opening degree of the first electronic expansion valve unchanged. For the second air outlet, when the second outlet air temperature is higher than 20 ℃, the opening degree of the second electronic expansion valve is increased; when the second outlet air temperature is lower than 20 ℃, reducing the opening degree of a second electronic expansion valve; and when the second outlet air temperature is equal to 20 ℃, keeping the opening degree of the second electronic expansion valve unchanged. That is to say, the air-out temperature of the first air outlet and the air-out temperature of the second air outlet are relatively independent.
When the first outlet air temperature is higher than the third set temperature, the opening degree of the first electronic expansion valve is reduced, so that the flow of a refrigerant can be reduced, heating is slowed down, and an energy-saving effect is achieved; when the first outlet air temperature is lower than the third set temperature, the opening degree of the first electronic expansion valve is increased, the flow of a refrigerant is increased, heating is accelerated, and response is timely carried out; and when the first air outlet temperature is equal to the third set temperature, keeping the opening degree of the first electronic expansion valve unchanged, thereby keeping better air outlet experience.
In step S4, when the operation mode of the air conditioner is a cooling mode, the adjusting the frequency of the compressor according to the coil temperature and the opening degree of the electronic expansion valve includes:
when the temperature of a coil pipe of the first indoor heat exchanger is in a first temperature interval and the opening degree of the first electronic expansion valve is in a first opening degree interval, increasing the frequency of the compressor; the first indoor heat exchanger is any one of a plurality of indoor heat exchangers in an indoor unit, and the first electronic expansion valve is connected with the first indoor heat exchanger; that is, at this time, the temperature of any indoor heat exchanger falls into the corresponding temperature zone, and the opening degree of the corresponding electronic expansion valve satisfies the set opening degree, that is, the frequency of the compressor is adjusted.
When the temperatures of the coil pipes of all the indoor heat exchangers are in a second temperature interval and the opening degree of the first electronic expansion valve is in a second opening degree interval, keeping the frequency of the compressor unchanged;
when the temperature of the coil of the first indoor heat exchanger is in a third temperature interval, adjusting the frequency of the compressor according to the change of the temperature of the coil of the first indoor heat exchanger;
the temperature control device comprises a first temperature interval, a second temperature interval and a third temperature interval, wherein no temperature intersection exists among the first temperature interval, the second temperature interval and the third temperature interval, any temperature value in the first temperature interval is larger than any temperature value in the second temperature interval, any temperature value in the second temperature interval is larger than any temperature value in the third temperature interval, and any opening value in the first opening interval is larger than any opening value in the second opening interval.
In an embodiment of the present invention, in cooling, the first condition is: the temperature of a coil of the first indoor heat exchanger is more than 12 ℃, and the opening degree of the first electronic expansion valve is more than 240 (the total opening degree is 480); the second condition is: the temperature of the coil of the second indoor heat exchanger is more than 12 ℃, and the opening degree of the second electronic expansion valve is more than 240 (the total opening degree is 480). At this time, the frequency of the compressor is increased as long as any one of the first condition or the second condition is satisfied. Because the coil pipe temperature is too high, the air-out temperature can not be adjusted relatively fast by simply opening the electronic expansion valve at the moment. The benefit that sets up like this lies in, through the regulation of compressor, increase system power in time adjusts the air-out temperature.
In the cooling, the third condition is: the coil temperature T of the first indoor heat exchanger satisfies the following conditions: t is more than or equal to 5 ℃ and less than or equal to 12 ℃, and the opening degree of the first electronic expansion valve is less than 240 (the total opening degree is 480); the second condition is: the temperature of the coil of the second indoor heat exchanger is more than 12 ℃, and the opening degree of the second electronic expansion valve is less than 240 (the total opening degree is 480). At this time, the first condition and the second condition need to be satisfied at the same time, and the frequency of the compressor is kept unchanged.
In cooling, the fifth condition is: the temperature of a coil pipe of the first indoor heat exchanger is less than 5 ℃; the sixth condition is: the coil temperature of the second indoor heat exchanger is less than 5 ℃. At this time, the frequency of the compressor may be adjusted according to a change in the coil temperature of the first indoor heat exchanger as long as any one of a first condition or a second condition is satisfied, where the adjusting the frequency of the compressor according to the change in the coil temperature of the first indoor heat exchanger includes:
controlling the compressor 1 to keep the current frequency running for a first set time;
and detecting the temperature of the coil of the first indoor heat exchanger, and reducing the frequency of the compressor 1 if the temperature of the coil of the first indoor heat exchanger is still in a third temperature interval.
In addition, under other conditions of the present embodiment, the frequency of the compressor is kept at the current frequency.
In the embodiment of the invention, when the coil temperature of the first indoor heat exchanger is less than 5 ℃ or the coil temperature of the second indoor heat exchanger is less than 5 ℃, the compressor is firstly kept running for 10 minutes, then the coil temperature of the first indoor heat exchanger is detected, and if the coil temperature of the first indoor heat exchanger is still less than 5 ℃ or the coil temperature of the second indoor heat exchanger is still less than 5 ℃, the frequency of the compressor 1 is reduced; on the contrary, if the coil temperature of the first indoor heat exchanger and the coil temperature of the second indoor heat exchanger are both more than or equal to 5 ℃, the frequency of the compressor is kept unchanged. Here, the compressor is first kept operating at the current operating frequency for a set time, so that the first electronic expansion valve and the second electronic expansion valve can be adjusted within a sufficient time. Meanwhile, misjudgment of surplus capacity of the compressor can be avoided, the power of the compressor can be reduced on the basis of ensuring the refrigeration effect, and the energy-saving effect is achieved.
When the operation mode of the air conditioner is a heating mode, the adjusting the frequency of the compressor according to the temperature of the coil and the opening degree of the electronic expansion valve comprises:
when the temperature of the coil pipe of the first indoor heat exchanger is in a fourth temperature interval and the opening degree of the first electronic expansion valve is larger than or equal to a third set opening degree, increasing the frequency of the compressor; the first indoor heat exchanger is any one of a plurality of indoor heat exchangers in an indoor unit, and the first electronic expansion valve is connected with the first indoor heat exchanger;
when the temperatures of the coil pipes of all the indoor heat exchangers are in a fifth temperature interval and the opening degree of the first electronic expansion valve is greater than or equal to a fourth set opening degree, keeping the frequency of the compressor unchanged;
when the temperature of the coil of the first indoor heat exchanger is in a sixth temperature interval, adjusting the frequency of the compressor according to the change of the temperature of the coil of the first indoor heat exchanger;
and no temperature intersection exists among the fourth temperature interval, the fifth temperature interval and the sixth temperature interval, any temperature value in the sixth temperature interval is greater than any temperature value in the fifth temperature interval, any temperature value in the fifth temperature interval is greater than any temperature value in the fourth temperature interval, and the third set opening degree is greater than the fourth set opening degree.
In the embodiment of the present invention, the seventh condition is: the temperature of a coil of the first indoor heat exchanger is less than 42 ℃, and the opening degree of the first electronic expansion valve is greater than 400 (the total opening degree is 480); the eighth condition is: the coil temperature of the second indoor heat exchanger is less than 42 ℃ and the opening degree of the second electronic expansion valve is more than 400 (the total opening degree is 480). At this time, the frequency of the compressor is increased as long as any one of the seventh condition or the eighth condition is satisfied. Because the coil pipe temperature is too low, the air-out temperature can not be adjusted relatively fast by simply opening the electronic expansion valve at the moment. The advantage of setting up like this is, through the regulation of compressor, increases system power, in time adjusts the air-out temperature, also can realize the further regulation to heating system on the basis that electronic expansion valve adjusted.
In heating, the ninth condition is: the coil temperature T of the first indoor heat exchanger satisfies the following conditions: t is more than or equal to 42 ℃ and less than or equal to 46 ℃, and the opening degree of the first electronic expansion valve is more than 360 (the total opening degree is 480); the second condition is: the coil temperature T of the second indoor heat exchanger satisfies: t is more than or equal to 42 ℃ and less than or equal to 46 ℃, and the opening degree of the second electronic expansion valve is more than 360 (the total opening degree is 480). At this time, the first condition and the second condition need to be satisfied at the same time, and the frequency of the compressor is kept unchanged.
In heating, the eleventh condition is: the temperature of a coil pipe of the first indoor heat exchanger is more than 46 ℃; the sixth condition is: the coil temperature of the second indoor heat exchanger is greater than 46 ℃. At this time, the frequency of the compressor may be adjusted according to a change in the temperature of the coil of the indoor heat exchanger as long as any one of the first condition or the second condition is satisfied.
In addition, under other conditions of the present embodiment, the frequency of the compressor is kept at the current frequency.
Here, the adjusting of the frequency of the compressor according to the variation of the coil temperature of the first indoor heat exchanger includes:
controlling the compressor to keep the current frequency running for a second set time;
and detecting the temperature of the coil of the first indoor heat exchanger, and reducing the frequency of the compressor if the temperature of the coil of the first indoor heat exchanger is still in a sixth temperature interval.
In the embodiment of the invention, when the coil temperature of the first indoor heat exchanger is higher than 46 ℃ or the coil temperature of the second indoor heat exchanger is higher than 46 ℃, the compressor is firstly kept running for 10 minutes, then the coil temperature of the first indoor heat exchanger is detected, and if the coil temperature of the first indoor heat exchanger is still higher than 46 ℃ or the coil temperature of the second indoor heat exchanger is still higher than 46 ℃, the frequency of the compressor 1 is reduced; on the contrary, if the coil temperature of the first indoor heat exchanger and the coil temperature of the second indoor heat exchanger are both less than or equal to 46 ℃, the frequency of the compressor is kept unchanged. Here, the compressor is first kept operating at the current operating frequency for a set time, so that the first electronic expansion valve and the second electronic expansion valve can be adjusted within a sufficient time. Meanwhile, misjudgment of surplus capacity of the compressor can be avoided, the power of the compressor can be reduced on the basis of ensuring the heating effect, and the energy-saving effect is achieved.
Another embodiment of the present invention provides a control apparatus of an air conditioner, as shown in fig. 3, including:
the detection unit 11 is used for detecting the air outlet temperature of the air outlets corresponding to all the indoor heat exchangers and the coil temperature of all the indoor heat exchangers;
a control unit 12 for adjusting the opening of the electronic expansion valve according to the operation mode of the air conditioner and the outlet air temperature,
the control unit 12 is further configured to adjust the frequency of the compressor according to the coil temperature and the opening degree of the electronic expansion valve.
Another embodiment of the present invention provides an air conditioner including any one of the above control devices. The air conditioner controls the control device of the air conditioner by using the control method of the air conditioner, and different air outlet requirements of different air outlets of the same indoor unit are met.
Another embodiment of the present invention provides an air conditioner including a computer-readable storage medium storing a computer program and a processor, wherein the computer program is read by the processor and executed to implement the control method of the air conditioner according to any one of the above aspects. The storage medium may be a magnetic disk, an optical disk, a Read-only Memory (ROM), a Random Access Memory (RAM), or the like.
As shown in fig. 1, an air conditioning indoor unit 5 is provided with a plurality of independent indoor heat exchangers 6, an electronic expansion valve 10 independent of each other is provided at a refrigerant inlet of each indoor heat exchanger, and a plurality of outlets are provided at positions corresponding to the positions of the indoor heat exchangers 6. In addition, all be provided with different fan 7 in every indoor heat exchanger corresponding position, detecting element includes a plurality of temperature sensor, and every air outlet of indoor set and every indoor heat exchanger's coil pipe department all are provided with temperature sensor. And a first temperature sensor 9 is correspondingly arranged at the coil pipe of each indoor heat exchanger 6, the coil pipe temperature of each indoor heat exchanger 6 is detected, and a second temperature sensor 8 is correspondingly arranged at each air outlet to detect the air outlet temperature of each air outlet. Through the control of a plurality of temperature sensors, the temperature of each air outlet and the coil pipe is detected simultaneously, so that the result is more accurate, and the independent control of the air outlet temperature of each air outlet is realized.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A method of controlling an air conditioner, comprising:
detecting the air outlet temperature of the air outlets corresponding to all the indoor heat exchangers (6);
the opening degree of the electronic expansion valve (10) is adjusted according to the running mode of the air conditioner and the outlet air temperature,
detecting coil temperatures of all the indoor heat exchangers (6);
and adjusting the frequency of the compressor (1) according to the temperature of the coil and the opening degree of the electronic expansion valve (10).
2. The control method of the air conditioner according to claim 1, wherein the adjusting the opening degree of the electronic expansion valve (10) according to the operation mode of the air conditioner and the outlet air temperature comprises:
when the operation mode of the air conditioner is a cooling mode: when the first outlet air temperature is higher than a first set temperature, the opening degree of the first electronic expansion valve is increased; when the first outlet air temperature is lower than the first set temperature, the opening degree of the first electronic expansion valve is reduced; when the first outlet air temperature is equal to the first set temperature, keeping the opening degree of the first electronic expansion valve unchanged; the first outlet air temperature is the temperature of an air outlet corresponding to the first indoor heat exchanger, and the first electronic expansion valve is connected with the first indoor heat exchanger.
3. The control method of the air conditioner according to claim 1, wherein the adjusting the opening degree of the electronic expansion valve (10) according to the operation mode of the air conditioner and the outlet air temperature comprises:
when the operation mode of the air conditioner is a heating mode: when the first outlet air temperature is higher than the second set temperature, the opening degree of the first electronic expansion valve is reduced; when the first outlet air temperature is lower than the second set temperature, the opening degree of the first electronic expansion valve is increased; when the first outlet air temperature is equal to the second set temperature, keeping the opening degree of the first electronic expansion valve unchanged; the first outlet air temperature is the temperature of an air outlet corresponding to the first indoor heat exchanger, and the first electronic expansion valve is connected with the first indoor heat exchanger.
4. The control method of an air conditioner according to claim 1, wherein said adjusting the frequency of the compressor (1) according to the coil temperature and the opening degree (10) of the electronic expansion valve comprises:
when the operation mode of the air conditioner is a cooling mode:
when the temperature of a coil of the first indoor heat exchanger is in a first temperature interval and the opening degree of the first electronic expansion valve is in a first opening degree interval, increasing the frequency of the compressor (1); the first indoor heat exchanger is any one (6) of a plurality of indoor heat exchangers in an indoor unit (5), and the first electronic expansion valve is connected with the first indoor heat exchanger;
when the temperatures of the coil pipes of all the indoor heat exchangers are in a second temperature interval and the opening degree of the first electronic expansion valve is in a second opening degree interval, keeping the frequency of the compressor (1) unchanged;
when the temperature of the coil of the first indoor heat exchanger is in a third temperature interval, adjusting the frequency of the compressor (1) according to the change of the temperature of the coil of the first indoor heat exchanger;
any temperature value in the first temperature interval is larger than any temperature value in the second temperature interval, any temperature value in the second temperature interval is larger than any temperature value in the third temperature interval, and any opening value in the first opening interval is larger than any opening value in the second opening interval.
5. The control method of an air conditioner according to claim 4, wherein said adjusting the frequency of the compressor (1) according to the variation of the coil temperature of the first indoor heat exchanger includes:
controlling the compressor (1) to keep the current frequency running for a first set time;
and detecting the temperature of the coil of the first indoor heat exchanger, and reducing the frequency of the compressor (1) if the temperature of the coil of the first indoor heat exchanger is still in the third temperature interval.
6. The control method of an air conditioner according to claim 1, wherein said adjusting the frequency of said compressor (1) according to said coil temperature and the opening degree of said electronic expansion valve (10) comprises:
when the operation mode of the air conditioner is a heating mode:
when the temperature of a coil of the first indoor heat exchanger is in a fourth temperature interval and the opening degree of the first electronic expansion valve is larger than or equal to a third set opening degree, increasing the frequency of the compressor (1); the first indoor heat exchanger is any one of a plurality of indoor heat exchangers in an indoor unit, and the first electronic expansion valve is connected with the first indoor heat exchanger;
when the temperatures of the coil pipes of all the indoor heat exchangers are in a fifth temperature interval and the opening degree of the first electronic expansion valve is larger than or equal to a fourth set opening degree, keeping the frequency of the compressor (1) unchanged;
when the temperature of the coil of the first indoor heat exchanger is in a sixth temperature interval, adjusting the frequency of the compressor (1) according to the change of the temperature of the coil of the first indoor heat exchanger;
any temperature value in the sixth temperature interval is larger than any temperature value in the fifth temperature interval, any temperature value in the fifth temperature interval is larger than any temperature value in the fourth temperature interval, and the third set opening degree is larger than the fourth set opening degree.
7. The control method of an air conditioner according to claim 6, wherein said adjusting the frequency of the compressor (1) according to the variation of the coil temperature of the first indoor heat exchanger includes:
controlling the compressor (1) to keep the current frequency running for a second set time;
and detecting the temperature of the coil of the first indoor heat exchanger, and reducing the frequency of the compressor (1) if the temperature of the coil of the first indoor heat exchanger is still in the sixth temperature interval.
8. A control apparatus of an air conditioner, comprising:
the detection unit (11) is used for detecting the air outlet temperature of the air outlets corresponding to all the indoor heat exchangers (6) and the coil temperature of all the indoor heat exchangers (6);
a control unit (12) for adjusting the opening degree of the electronic expansion valve (10) according to the operation mode of the air conditioner and the outlet air temperature,
the control unit (12) is also used for adjusting the frequency of the compressor (1) according to the temperature of the coil and the opening degree of the electronic expansion valve (10).
9. An air conditioner comprising a computer-readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the control method of the air conditioner according to any one of claims 1 to 7.
10. The air conditioner according to claim 9, wherein the air conditioner comprises a plurality of temperature sensors, and the temperature sensors are provided at each air outlet of the indoor unit of the air conditioner and at the coil of each indoor heat exchanger.
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