CN113375271A - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
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- CN113375271A CN113375271A CN202110686972.0A CN202110686972A CN113375271A CN 113375271 A CN113375271 A CN 113375271A CN 202110686972 A CN202110686972 A CN 202110686972A CN 113375271 A CN113375271 A CN 113375271A
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000003507 refrigerant Substances 0.000 claims abstract description 79
- 238000001816 cooling Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 description 5
- 238000007664 blowing Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/79—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling the direction of the supplied air
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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
- F24F11/88—Electrical aspects, e.g. 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
Abstract
The invention discloses an air conditioner and a control method thereof. The control method comprises the following steps: s1, receiving the first indoor air outlet and the second indoor air outletAir-out temperature difference grade instruction and air-out temperature difference grade TNThe expected air outlet temperature difference range of the first indoor air outlet and the second indoor air outlet is obtained; s2, adjusting the refrigerant quantity flowing through at least one of the first indoor heat exchanger and the second indoor heat exchanger according to the air outlet temperature difference grade instruction; s3, determining the actual air outlet temperature difference delta T of the first indoor air outlet and the second indoor air outlet; s4, if the actual outlet air temperature difference Delta T is within the expected outlet air temperature difference range, keeping the refrigerant quantity flowing through the first indoor heat exchanger and the second indoor heat exchanger; and S5, if the actual outlet air temperature difference Delta T falls outside the expected outlet air temperature difference range, adjusting the refrigerant quantity flowing through at least one of the first indoor heat exchanger and the second indoor heat exchanger until the actual outlet air temperature difference Delta T falls within the expected outlet air temperature difference range.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioner and the air conditioner.
Background
In the related art, a heat exchanger is provided in an on-hook air conditioner indoor unit, and the on-hook air conditioner indoor unit has an air outlet opposite to the indoor heat exchanger. Therefore, the indoor air outlet temperature of the on-hook indoor unit of the air conditioner is basically consistent, so that the requirement of a user on air supply of the split temperature zone cannot be met.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a control method for an air conditioner, which enables the air conditioner to generate a temperature difference between the indoor air outlet temperature and the indoor air outlet temperature, thereby satisfying the user's requirement for air supply to the warm-up area.
Another object of the present invention is to provide an air conditioner using the above control method.
According to a first aspect of the present invention, a control method for an air conditioner having a first indoor air outlet and a second indoor air outlet includes the steps of: s1, receiving air outlet temperature difference grade instructions of the first indoor air outlet and the second indoor air outlet, and obtaining an air outlet temperature difference grade TNThe expected air outlet temperature difference range of the first indoor air outlet and the second indoor air outlet is obtained; s2, adjusting the flow through the first indoor heat exchange according to the air outlet temperature difference grade instructionA refrigerant amount of at least one of the heat exchanger and the second indoor heat exchanger; s3, determining the actual air outlet temperature difference delta T of the first indoor air outlet and the second indoor air outlet; s4, if the actual outlet air temperature difference is within the expected outlet air temperature difference range, keeping the refrigerant amount flowing through the first indoor heat exchanger and the second indoor heat exchanger; and S5, if the actual outlet air temperature difference Delta T falls outside the expected outlet air temperature difference range, adjusting the amount of refrigerant flowing through at least one of the first indoor heat exchanger and the second indoor heat exchanger until the actual outlet air temperature difference Delta T falls within the expected outlet air temperature difference range.
According to the control method of the air conditioner, the air conditioner is provided with the first indoor air outlet and the second indoor air outlet, the air conditioner comprises the first indoor heat exchanger and the second indoor heat exchanger which are connected in parallel, the first indoor heat exchanger is opposite to the first indoor air outlet, the second indoor heat exchanger is opposite to the second air outlet, and through the steps S1-S5, the temperature difference of air blown by the air conditioner indoors can be formed, and the requirement of a user on air blowing of the air distribution area is met.
According to some embodiments of the present invention, step S3 specifically includes: s31, respectively detecting a first surface temperature of the first indoor heat exchanger and a second surface temperature of the second indoor heat exchanger; and S32, calculating the difference value between the first surface temperature and the second surface temperature to determine the actual air outlet temperature difference DeltaT between the first indoor air outlet and the second indoor air outlet.
According to some embodiments of the present invention, step S3 specifically includes: s33, respectively detecting a first air outlet temperature of the first indoor air outlet and a second air outlet temperature of the second indoor air outlet; and S31, calculating the difference value between the first air outlet temperature and the second air outlet temperature to determine the actual air outlet temperature difference DeltaT between the first indoor air outlet and the second indoor air outlet.
According to some embodiments of the present invention, the actual outlet air temperature difference Δ T in step S3 is determined every predetermined time, and step S4 or S5 is performed according to the actual outlet air temperature difference Δ T until the actual outlet air temperature difference falls within the desired outlet air temperature difference range.
According to some embodiments of the invention, the outlet air temperature difference level is a plurality of levels, and the plurality of levels includes a first outlet air temperature difference level T1And the second outlet temperature difference grade T2And the third outlet temperature difference grade T3And the fourth air outlet temperature difference grade T4And the fifth outlet temperature difference grade T5And the sixth outlet temperature difference grade T6And the seventh air-out temperature difference grade T7Eighth outlet temperature difference grade T8And ninth outlet temperature difference grade T9Wherein, the T is1、T2、T3、T4、T5、T6、T7、T8、T9Respectively satisfy: t is1＜-7℃；-7℃≤T2＜-5℃；-5℃≤T3＜-3℃；-3℃≤T4＜-1℃；-1℃≤T5≤1℃；1℃＜T6≤3℃；3℃＜T7≤5℃；5℃＜T8≤7℃；T9＞7℃。
According to some embodiments of the present invention, the air conditioner further includes a refrigerant control device for adjusting a flow rate of the refrigerant flowing through the first indoor heat exchanger and the second indoor heat exchanger, the refrigerant control device including an electric three-way valve; step S2 specifically includes: and adjusting the refrigerant control device to a preset step number according to the air outlet temperature difference grade instruction.
According to some embodiments of the present invention, the air conditioner further includes a refrigerant control device for adjusting a flow rate of the refrigerant flowing through the first indoor heat exchanger and the second indoor heat exchanger, and before step S1, the control method further includes: s01, the air conditioner enters a cooling operation mode; and S02, controlling a first control port of the refrigerant control device, which is communicated with the first indoor heat exchanger, and a second control port of the refrigerant control device, which is communicated with the second indoor heat exchanger, to be completely opened.
According to some embodiments of the invention, the control method further comprises: s6, receiving a finger for stopping working of one of the first indoor heat exchanger and the second indoor heat exchangerOrder; s7, controlling a control port of the refrigerant control device, which is communicated with one of the first indoor heat exchanger and the second indoor heat exchanger, to be closed; s8, detecting the current working frequency F of the compressor of the air conditioner; s9, if the working frequency F is less than or equal to the maximum frequency F allowed by the compressor when one of the first indoor heat exchanger and the second indoor heat exchanger operatesLimit ofIf so, maintaining the current working frequency F; and S10, if the working frequency F is larger than FLimit ofThen controlling the current operating frequency F of the compressor to be reduced to FLimit of。
According to the air conditioner of the second aspect of the present invention, the control method of the air conditioner according to the above-described first aspect of the present invention is adopted.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flowchart of a control method of an air conditioner according to an embodiment of the present invention;
fig. 2 is a sub-flowchart of step S3 in the control method of the air conditioner shown in fig. 1;
fig. 3 is another sub-flowchart of step S3 in the control method of the air conditioner shown in fig. 1;
fig. 4 is a sub-flowchart of step S2 in the control method of the air conditioner shown in fig. 1;
fig. 5 is a flowchart of the air conditioner switching from two indoor heat exchanger operations to a single indoor heat exchanger operation;
FIG. 6 is a schematic view of an air conditioner according to an embodiment of the present invention operating in a cooling mode;
FIG. 7 is a schematic view of the air conditioner shown in FIG. 6 operating in a heating mode;
fig. 8 is a schematic view of an air conditioner according to an embodiment of the present invention operating in a cooling mode;
fig. 9 is a schematic view of an air conditioner according to an embodiment of the present invention operating in a cooling mode;
fig. 10 is a schematic view of the air conditioner shown in fig. 9 operating in a heating mode.
Reference numerals:
the control method 100; an air conditioner 200; a compressor 1; an outdoor heat exchanger 2; a throttle device 3; a refrigerant control device 4; an electric three-way valve 41; a first electronic expansion valve 421; a second electronic expansion valve 422; a first fan 51; a second fan 52; the first indoor heat exchanger 61; the second indoor heat exchanger 62; and a four-way valve 7.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Embodiments of the present invention will be described in detail below, the embodiments described with reference to the drawings being illustrative, and the embodiments of the present invention will be described in detail below.
A control method 100 of the air conditioner 200 according to an embodiment of the present invention is described below with reference to fig. 1 to 5 in conjunction with fig. 6 to 10.
According to the control method 100 of the air conditioner 200 of the embodiment of the first aspect of the present invention, the zoned area air supply can be realized.
Specifically, as shown in fig. 6 to 10, the air conditioner 200 includes a first indoor heat exchanger 61 and a second indoor heat exchanger 62 connected in parallel. The first indoor heat exchanger 61 and the second indoor heat exchanger 62 are connected in parallel, that is, a first end of the first indoor heat exchanger 61 is connected to a first end of the second indoor heat exchanger 62, and a second end of the first indoor heat exchanger 61 is connected to a second end of the second indoor heat exchanger 62. With this arrangement, a part of the refrigerant flows in from the first end of the first indoor heat exchanger 61 and flows out from the second end of the first indoor heat exchanger 61; the other part of the refrigerant flows in from the first end of the second indoor heat exchanger 62 and flows out from the second end of the second indoor heat exchanger 62.
The air conditioner 200 has a first indoor outlet (not shown) and a second indoor outlet (not shown). The first indoor air outlet and the second indoor air outlet can blow heated or refrigerated air into the room. The first indoor heat exchanger 61 is opposite to the first indoor air outlet, and the second indoor heat exchanger 62 is opposite to the second air outlet. Thus, the air that has exchanged heat with the first indoor heat exchanger 61 can be blown out from the first outlet, and the air that has exchanged heat with the second indoor heat exchanger 62 can be blown out from the second outlet. As described above, since the two portions of the refrigerant respectively flow through the first indoor heat exchanger 61 and the second indoor heat exchanger 62, the temperature of the air blown out from the first outlet port is directly related to the amount of the portion of the refrigerant flowing through the first indoor heat exchanger 61; likewise, the temperature of the air blown out from the second outlet port is directly related to the amount of the refrigerant flowing through the other portion of the second interior heat exchanger 62.
Referring to fig. 1, the control method 100 may include the following steps.
S1, receiving an air outlet temperature difference grade instruction of the first indoor air outlet and the second indoor air outlet, and obtaining an air outlet temperature difference grade TNThe expected air outlet temperature difference range of the first indoor air outlet and the second indoor air outlet.
When the user desires the first indoor outlet and the second indoor outlet to blow out air having different temperatures independently of each other, that is, when the user desires the air conditioner 200 to operate in the temperature-division mode, it may input an outlet temperature difference level instruction to the air conditioner 200, and the air conditioner 200 may receive the outlet temperature difference level instruction input by the user.
Air outlet temperature difference grade TNThe expected outlet air temperature difference ranges of the first indoor air outlet and the second indoor air outlet are shown, and at the moment, the user hopes that the difference between the temperature of the air blown out from the first indoor air outlet and the temperature of the air blown out from the second indoor air outlet is within the expected outlet air temperature difference range.
And S2, adjusting the refrigerant quantity flowing through at least one of the first indoor heat exchanger and the second indoor heat exchanger according to the air outlet temperature difference grade instruction.
Specifically, with reference to fig. 6 to 10, according to the air outlet temperature difference level instruction, only the amount of the refrigerant flowing through the first indoor heat exchanger 61 may be adjusted, or only the amount of the refrigerant flowing through the second indoor heat exchanger 62 may be adjusted, or the amounts of the refrigerant flowing through the first indoor heat exchanger 61 and the second indoor heat exchanger 62 may also be adjusted at the same time, so as to adjust the heat exchange capacities of the first indoor heat exchanger 61 and/or the second indoor heat exchanger 62, and further adjust the difference between the heat exchange capacities of the first indoor heat exchanger 61 and the second indoor heat exchanger 62.
And S3, determining the actual air outlet temperature difference delta T of the first indoor air outlet and the second indoor air outlet.
Alternatively, the temperature of the first indoor air outlet may be defined as T1, and the temperature of the second indoor air outlet may be defined as T2, so that Δ T is T1-T2 or T2-T1.
And S4, if the actual outlet air temperature difference Delta T is within the expected outlet air temperature difference range, keeping the refrigerant quantity flowing through the first indoor heat exchanger and the second indoor heat exchanger unchanged.
When the actual outlet air temperature difference Δ T falls within the expected outlet air temperature difference range defined by the outlet air temperature difference level instruction input by the user, it indicates that the difference between the temperatures of the air blown out from the first outlet and the second outlet of the air conditioner 200 meets the user's requirement, and at this time, the flow rates of the refrigerants flowing into the first indoor heat exchanger 61 and the second indoor heat exchanger 62 do not need to be changed, and only the refrigerant amounts flowing through the first indoor heat exchanger 61 and the second indoor heat exchanger 62 need to be maintained.
And S5, if the actual outlet air temperature difference Delta T falls outside the expected outlet air temperature difference range, adjusting the refrigerant quantity flowing through at least one of the first indoor heat exchanger and the second indoor heat exchanger until the actual outlet air temperature difference Delta T falls within the expected outlet air temperature difference range.
When the actual outlet air temperature difference Δ T is outside the expected outlet air temperature difference range, it indicates that the difference between the temperatures of the air blown out from the first outlet and the second outlet of the air conditioner 200 does not meet the requirement of the user at present, and the difference between the amounts of the refrigerants flowing into the first indoor heat exchanger 61 and the second indoor heat exchanger 62 needs to be adjusted. In this case, the refrigerant amount flowing through the first interior heat exchanger 61 alone, the refrigerant amount flowing through the second interior heat exchanger 62 alone, or both the first interior heat exchanger 61 and the second interior heat exchanger 62 may be adjusted. With the change of the amount of the refrigerant flowing through the first indoor heat exchanger 61 and/or the second indoor heat exchanger 62, the heat exchange capacity of the first indoor heat exchanger 61 and/or the second indoor heat exchanger 62 changes, so that the temperature of the air blown out from the first air outlet and/or the second air outlet changes, and the actual outlet air temperature difference Δ T can finally fall into the expected outlet air temperature difference range. When the actual outlet air temperature difference Δ T falls within the expected outlet air temperature difference range, it indicates that the amounts of the refrigerants flowing into the first indoor heat exchanger 61 and the second indoor heat exchanger 62 at this time satisfy the user requirements, so that the amounts of the refrigerants flowing through the first indoor heat exchanger 61 and the second indoor heat exchanger 62 do not need to be further adjusted.
According to the control method 100 of the air conditioner 200 of the embodiment of the invention, the air conditioner 200 is provided with the first indoor air outlet and the second indoor air outlet, the air conditioner 200 comprises the first indoor heat exchanger 61 and the second indoor heat exchanger 62 which are connected in parallel, the first indoor heat exchanger 61 is opposite to the first indoor air outlet, the second indoor heat exchanger 62 is opposite to the second air outlet, and through the steps S1-S5, the temperature difference of the air blown by the air conditioner 200 in the room can be formed, and the requirement of a user for the air distribution warm area can be met.
For example, when the user is located within the air supply range of the first indoor air outlet, only the first indoor heat exchanger 61 and the first fan 51 may work, at this time, only the first indoor air outlet may be opened, and the air flow after heat exchange may be guided by the first indoor air outlet and the air guide plate opposite to the first indoor air outlet and then blown into the room, so as to quickly adjust the temperature of the area corresponding to the first indoor air outlet in the room. The flowing direction of the airflow blown out from the first indoor air outlet can be adjusted through the air deflector, so that the flowing direction of the airflow is matched with the working mode of the indoor unit 200 of the air conditioner, and the user experience is improved.
Or, when the user is located within the air supply range of the first indoor air outlet, only the second indoor heat exchanger 62 and the second fan 52 may work, at this time, only the second indoor air outlet may be opened, the air flow after heat exchange may be blown into the room through the second indoor air outlet and the air deflector opposite to the second indoor air outlet, wherein the flow direction of the air flow blown out from the second indoor air outlet may be adjusted by the air deflector, so that the direct blowing of the air flow to the user may be avoided.
Similarly, when the user is located in the air supply range of the second indoor air outlet, only the second indoor heat exchanger 62 and the second fan 52 may work, and at this time, only the second indoor air outlet may be opened, and the air flow after heat exchange may be blown into the room after being guided by the second indoor air outlet and the corresponding air deflector; or, only the first indoor heat exchanger 61 and the first fan 51 may work, at this time, only the first indoor air outlet 11 may be opened, and the airflow after heat exchange may be blown to an indoor room after being guided by the first indoor air outlet and the air deflector opposite to the first indoor air outlet.
When a plurality of users are dispersed at each indoor position or the users are dynamically movable indoors, the first indoor heat exchanger 61 and the second indoor heat exchanger 62 can work simultaneously, the first fan 51 and the second fan 52 work simultaneously, the first indoor air outlet and the second indoor air outlet are opened simultaneously at the moment, air after heat exchange flows to the indoor space after being guided by the first indoor air outlet, the second indoor air outlet and the two air deflectors which are respectively arranged oppositely to the two indoor air outlets, the heat exchange efficiency of the air conditioner 200 can be effectively improved, and therefore the indoor temperature can be quickly adjusted.
According to some embodiments of the present invention, step S3 specifically includes:
s31, respectively detecting a first surface temperature of the first indoor heat exchanger and a second surface temperature of the second indoor heat exchanger;
and S32, calculating the difference value between the first surface temperature and the second surface temperature to determine the actual air outlet temperature difference Delta T of the first indoor air outlet and the second indoor air outlet.
So set up, can confirm the actual air-out difference in temperature Δ T of first indoor air outlet and the indoor air outlet of second more accurately, and then improve air conditioner 200's actual air-out difference in temperature precision, more accurately satisfy the demand of user to the air-out difference in temperature.
Alternatively, the air conditioner 200 includes a first temperature sensor (not shown) that is provided on the first indoor heat exchanger 61 and detects a coil temperature (i.e., a first surface temperature) of the first indoor heat exchanger 61, and a second temperature sensor (not shown) that is provided on the second indoor heat exchanger 62 and detects a coil temperature (i.e., a second surface temperature) of the second indoor heat exchanger 62. So set up, can obtain first surface temperature and second surface temperature accurately to confirm the actual air-out difference in temperature DeltaT of first indoor air outlet and second indoor air outlet more accurately.
According to another embodiment of the present invention, step S3 specifically includes:
s33, respectively detecting a first air outlet temperature of the first indoor air outlet and a second air outlet temperature of the second indoor air outlet;
and S34, calculating the difference value of the first air outlet temperature and the second air outlet temperature to determine the actual air outlet temperature difference delta T of the first indoor air outlet and the second indoor air outlet.
Specifically, the difference from the above-described embodiment is that the first surface temperature of the first indoor heat exchanger 61 and the second surface temperature of the second indoor heat exchanger 62 are not detected, but the first outlet air temperature of the first indoor outlet and the second outlet air temperature of the second indoor outlet are detected. So set up, can directly detect the temperature of the air that blows out from first indoor air outlet and the temperature of the air that blows out from the indoor air outlet of second to the actual air-out difference in temperature delta T of the first indoor air outlet that obtains and the indoor air outlet of second is more accurate, and then improves the accuracy of actual air-out difference in temperature.
Alternatively, the first outlet air temperature and the second outlet air temperature may be detected by providing temperature sensors at both the first indoor outlet air outlet and the second indoor outlet air outlet. So set up, the temperature detection mode is simple, high-efficient and the accuracy is high.
According to some embodiments of the present invention, the actual outlet air temperature difference Δ T in step S3 is determined at predetermined time intervals, and the above step S4 or S5 is performed according to the actual outlet air temperature difference Δ T until the actual outlet air temperature difference Δ T falls within the above desired outlet air temperature difference range.
For example, after the air conditioner 200 enters the temperature-division-area operation mode, the first surface temperature and the second surface temperature may be detected every predetermined time and a difference between the first surface temperature and the second surface temperature may be calculated; or detecting the first outlet air temperature and the second outlet air temperature every preset time and calculating the difference between the first outlet air temperature and the second outlet air temperature. Of course, the present invention is not limited to these two temperature detection modes. After each determination of the actual outlet air temperature difference Δ T, the amount of refrigerant flowing through the first indoor heat exchanger 61 and/or the second indoor heat exchanger 62 may be maintained or adjusted according to whether the actual outlet air temperature difference Δ T falls within the expected outlet air temperature difference range. Through the arrangement, before the actual outlet air temperature difference delta T falls in the expected outlet air temperature difference range, the difference between the actual outlet air temperature difference delta T and the expected outlet air temperature difference range can be determined in a circulating mode, and the amount of refrigerant flowing through the first indoor heat exchanger 61 and/or the second indoor heat exchanger 62 is adjusted in time according to the difference, so that the actual outlet air temperature difference falls in the expected outlet air temperature difference range as fast as possible.
Alternatively, the predetermined time may be 3 minutes. By the arrangement, on one hand, the actual air outlet temperature difference delta T can be determined in time, so that the actual air outlet temperature difference delta T falls in the expected air outlet temperature difference range as soon as possible; on the other hand, the frequent calculation of the actual outlet air temperature difference Δ T can be avoided, thereby reducing the power consumption of the air conditioner 200 to a certain extent. Of course, the present invention is not limited thereto. The predetermined time may be set according to various requirements. For example, in order to make the actual outlet air temperature difference Δ T fall within the expected outlet air temperature difference range more quickly, the predetermined time may be set to be shorter, for example, 2 minutes, so that the actual outlet air temperature difference Δ T is calculated more frequently and the amount of refrigerant flowing through the first indoor heat exchanger 61 and/or the second indoor heat exchanger 62 is adjusted in time; or the predetermined time may be set longer, for example, 4 minutes or 5 minutes, etc., in order to further reduce the power consumption of the air conditioner 200.
According to some embodiments of the present invention, the outlet air temperature difference level is plural, and in the description of the present invention, "plural" means two or more. From this, through setting up a plurality of air-out difference in temperature grades, can satisfy the difference in temperature demand of the same or different user under the same or different environment. For example, one user may expect the actual outlet air temperature difference Δ T to be between 1 ℃ and 3 ℃, and another user may expect the actual outlet air temperature difference Δ T to be between-2 ℃ and 0 ℃, so that various requirements of the same or different users can be met by setting a plurality of outlet air temperature difference levels.
Specifically, the plurality of outlet air temperature difference levels may include a first outlet air temperature difference level T1And the second outlet temperature difference grade T2And the third outlet temperature difference grade T3And the fourth air outlet temperature difference grade T4And the fifth outlet temperature difference grade T5And the sixth outlet temperature difference grade T6And the seventh air-out temperature difference grade T7Eighth outlet temperature difference grade T8And ninth outlet temperature difference grade T9Wherein, the T is1、T2、T3、T4、T5、T6、T7、T8、T9Respectively satisfy:
T1＜-7℃；
-7℃≤T2＜-5℃；
-5℃≤T3＜-3℃；
-3℃≤T4＜-1℃；
-1℃≤T5≤1℃；
1℃＜T6≤3℃；
3℃＜T7≤5℃；
5℃＜T8≤7℃；
T9＞7℃。
from this, set up above-mentioned 9 air-out temperature difference levels and corresponding expectation air-out temperature difference scope, can satisfy more expectation air-out temperature difference scope demands of user. The actual air outlet temperature difference between the first indoor air outlet and the second indoor air outlet is set to be delta T (namely, the temperature corresponding to the first indoor air outlet is subtracted by the temperature corresponding to the second indoor air outlet), and then the actual air outlet temperature difference between the second indoor air outlet and the first indoor air outlet is set to be delta T (namely, the temperature corresponding to the second indoor air outlet is subtracted by the temperature corresponding to the first indoor air outlet). Of course, the present invention is not limited thereto. Other numbers of outlet air temperature difference levels can also be set for the air conditioner 200, and the expected outlet air temperature difference range represented by each outlet air temperature difference level can be set according to actual requirements.
According to some embodiments of the present invention, the air conditioner 200 further includes a refrigerant control device 4 for adjusting the flow rate of the refrigerant flowing through the first indoor heat exchanger 61 and the second indoor heat exchanger 62, and the refrigerant control device 4 includes an electric three-way valve 41.
Step S2 specifically includes:
and adjusting the refrigerant control device to a preset step number according to the air outlet temperature difference grade instruction.
Specifically, the first indoor heat exchanger 61 and the second indoor heat exchanger 62 are both connected to the electric three-way valve 41, and the amounts of refrigerant flowing through the first indoor heat exchanger 61 and the second indoor heat exchanger 62 can be simultaneously adjusted. When the amount of the refrigerant flowing through the first indoor heat exchanger 61 increases, the amount of the refrigerant flowing through the second indoor heat exchanger 62 decreases; when the amount of the refrigerant flowing through the first interior heat exchanger 61 decreases, the amount of the refrigerant flowing through the second interior heat exchanger 62 increases. The preset number of steps is different, which means that the opening degrees of the electric three-way valve 41 are different, so that the refrigerant amount flowing through the first indoor heat exchanger 61 is different and the refrigerant amount flowing through the second indoor heat exchanger 62 is also different, and thus the actual outlet air temperature difference Δ T is also different. Each air outlet temperature difference grade can correspond to a preset step number, and under the preset step number, the actual air outlet temperature difference delta T can be close to or fall within an expected air outlet temperature difference range defined by the air outlet temperature difference grade. After the air conditioner 200 receives the air outlet temperature difference level instruction, the refrigerant control device 4 is adjusted to the preset step number, so that the actual air outlet temperature difference can approach or fall within the expected air outlet temperature difference range. With such an arrangement, the refrigerant control device 4 can adjust the refrigerant quantity flowing through the first indoor heat exchanger 61 and the second indoor heat exchanger 62 to the refrigerant quantity meeting the expected outlet temperature difference range as quickly as possible, thereby shortening the time required for the actual outlet temperature difference Δ T to fall within the expected outlet temperature difference range.
Specifically, as shown in fig. 4 to 5, the electric three-way valve 41 includes a first control port connected to the first indoor heat exchanger 61, a second control port connected to the second indoor heat exchanger 62, and a third control port with which at least one of the first control port and the second control port is switchably communicated. Each preset step number corresponds to a preset opening degree of the electric three-way valve 41.
Optionally, when the refrigerant control device 4 includes the electric three-way valve 41, the outlet air temperature difference level T is set1、T2、T3、T4、T5、T6、T7、T8、T9The preset number of steps of the corresponding electric three-way valve can be as follows:
the air outlet temperature difference grade is T1The preset number of steps is 80 steps;
the air outlet temperature difference grade is T2Meanwhile, the preset number of steps is 140 steps;
the air outlet temperature difference grade is T3The preset number of steps is 200 steps;
the air outlet temperature difference grade is T4Meanwhile, presetting the number of steps as 260 steps;
the air outlet temperature difference grade is T5Then, presetting the step number as 300 steps;
the air outlet temperature difference grade is T6The preset number of steps is 360 steps;
the air outlet temperature difference grade is T7Then, the preset number of steps is 420 steps;
the air outlet temperature difference grade is T8When the number of the preset steps is 480 steps;
the air outlet temperature difference grade is T9The preset number of steps is 540 steps.
In this case, the closer to 0 ℃ the expected outlet temperature difference range defined by the outlet temperature difference level is, the closer to full opening the first control port and the second control port of the electric three-way valve 41 is, and the closer to equal the refrigerant quantity flowing through the first indoor heat exchanger 61 and the refrigerant quantity flowing through the second indoor heat exchanger 62 at this time. Through corresponding each air-out difference in temperature grade above-mentioned predetermined step number, can realize the meticulous division of expectation air-out difference in temperature scope.
Further alternatively, in the case where the air conditioner 200 is operated in the cooling mode, at the predetermined number of steps,
if the actual air outlet temperature difference Delta T is less than TNThen at TNThe corresponding preset step number is increased by 5 steps;
if the actual outlet air temperature difference delta T belongs to TNIf so, keeping the current opening of the electric three-way valve 41 unchanged;
if the actual air outlet temperature difference Delta T is more than TNThen at TNAnd the corresponding preset step number is reduced by 5 steps.
Determining the actual air outlet temperature difference delta T every predetermined time, and continuing the adjustment according to the actual air outlet temperature difference delta T at the opening degree (i.e. the number of steps after adjustment) of the electric three-way valve 41 after the last adjustment until the actual air outlet temperature difference delta T belongs to TN. So set up, can shorten the time that actual air-out difference in temperature delta T falls in expectation air-out within range, improve user experience.
According to other embodiments of the present invention, referring to fig. 9-10, the refrigerant control device 4 may further include a three-way pipe (not shown), the three-way pipe includes a first control port, a second control port and a third control port, the first electronic expansion valve 421 is disposed on a pipe of the three-way pipe communicated with the second control port, and the second electronic expansion valve 422 is disposed on a pipe of the three-way pipe communicated with the third control port.
Step S2 may include:
according to the air outlet temperature difference instruction, the first electronic expansion valve 421 is adjusted to a first preset step number and the second electronic expansion valve 422 is adjusted to a second preset step number.
Similarly, the actual outlet air temperature difference can be close to or fall within the expected outlet air temperature difference range under the first preset step number and the second preset step number corresponding to each outlet air temperature difference instruction. When the actual outlet air temperature difference falls outside the expected outlet air temperature difference range, the opening degree of the first electronic expansion valve 421 may be continuously adjusted on the basis of the first preset number of steps and/or the opening degree of the second electronic expansion valve 422 may be continuously adjusted on the basis of the second preset number of steps.
Referring to fig. 6-10, prior to step S1, according to some embodiments of the invention, control method 100 further includes:
s01, the air conditioner enters a refrigeration running mode;
and S02, controlling a first control port of the refrigerant control device, which is communicated with the first indoor heat exchanger, and a second control port of the refrigerant control device, which is communicated with the second indoor heat exchanger to be completely opened.
Specifically, the air conditioner 200 may enter the cooling operation mode when the air conditioner 200 is started, and then the first control port of the refrigerant control device 4, which is communicated with the first indoor heat exchanger 61, and the second control port of the refrigerant control device, which is communicated with the second indoor heat exchanger 62, are controlled to be completely opened, at this time, the amount of the refrigerant flowing through the first indoor heat exchanger 61 is the same as the amount of the refrigerant flowing through the second indoor heat exchanger 62, and an outlet air temperature difference is not formed or an actual outlet air temperature difference is very small. With such a configuration, on one hand, the air conditioner 200 can be ensured to operate only in the conventional refrigeration mode when being started, and a user can selectively determine whether to enable the air conditioner 200 to enter the temperature-division area mode for operation; on the other hand, after the user inputs the air outlet temperature difference grade instruction, the temperature can be adjusted under the condition that no air outlet temperature difference or small air outlet temperature difference exists, and the problem that the time for reaching the expected air outlet temperature difference grade is long due to the fact that the difference between the opening degree of the first control opening and the opening degree of the second control opening and the expected opening degree is too large is solved.
Of course, the present invention is not limited thereto. In other embodiments of the present invention, before step S1, the control method 100 may further include:
the air conditioner enters a heating operation mode;
and a first control port communicated with the first indoor heat exchanger and a second control port communicated with the second indoor heat exchanger of the refrigerant control device are controlled to be completely opened.
According to some embodiments of the invention, the control method 100 may further comprise:
s6, receiving an instruction of stopping working of one of the first indoor heat exchanger and the second indoor heat exchanger;
s7, controlling a control port of the refrigerant control device, which is communicated with one of the first indoor heat exchanger and the second indoor heat exchanger, to be closed;
s8, detecting the current working frequency F of the compressor of the air conditioner;
s9, if the working frequency F is less than or equal to the maximum frequency F allowed by the compressor 1 when one of the first indoor heat exchanger and the second indoor heat exchanger is operatedLimit ofIf so, keeping the current working frequency F;
s10, if the working frequency F is more than FLimit ofThen controlling the current working frequency F of the compressor to be reduced to FLimit of。
Specifically, when the user wants to control the air conditioner 200 to switch from the divided temperature zone operation mode to the normal operation mode (may be referred to as a single temperature zone operation mode), it may input an instruction to the air conditioner 200 to command the first indoor heat exchanger 61 or the second indoor heat exchanger 62 to stop operating. The user can select to deactivate the first indoor heat exchanger 61 or deactivate the second indoor heat exchanger 62 according to actual needs. After the air conditioner 200 receives the instruction, the control port of the refrigerant control device 4, which communicates with the first indoor heat exchanger 61 or the second indoor heat exchanger 62 that has stopped operating, is controlled to be closed. At this time, the refrigerant flows only through the second indoor heat exchanger 62 or the first indoor heat exchanger 61 which continues to operate, and the air conditioner 200 blows air only from the corresponding second indoor air outlet or the corresponding first indoor air outlet. After the air conditioner 200 is switched to the operation mode of only one indoor heat exchanger, the current operating frequency F of the compressor 1 is detected to prevent the current operating frequency of the compressor 1 from exceeding the maximum frequency F allowed when a single indoor heat exchanger is operatedLimit of. In particular, at the current operating frequency F of the compressor 1, less than or equal to FLimit ofWhen the current working frequency F of the compressor 1 is maintained, i.e. the compressor 1 does not need to change the current working frequency; at the present operating frequency F of the compressor 1 greater than FLimit ofWhen it is time, the current operating frequency of the compressor 1 is reduced to FLimit ofSo as to prevent the compressor 1 from operating at an excessively high operating frequency, thereby preventing the air conditioner 200 from excessively cooling or excessively heating, and extending the service life of the air conditioner 200.
OptionallyGround, FLimit ofSatisfies the following conditions: f is less than or equal to 50HzLimit ofLess than or equal to 60 Hz. Thereby, by adding FLimit ofIs set to be less than or equal to F at 50HzLimit ofThe frequency is less than or equal to 60Hz, so that the air conditioner 200 can ensure the proper cooling or heating effect of the air conditioner 200 when a single indoor heat exchanger operates. Of course, the present invention is not limited thereto, and F may be set according to various design requirementsLimit ofSet to different values. For example, FLimit of50 Hz; or FLimit of55 Hz; or FLimit of＝60Hz。
According to the air conditioner 200 of the second embodiment of the present invention, the control method 100 of the air conditioner 200 according to the above-mentioned first embodiment of the present invention is adopted.
According to the air conditioner 200 of the embodiment of the invention, by adopting the control method, the temperature difference can be formed by indoor air blowing, and the requirement of a user on air supply of the warm division area is met.
Other configurations of the air conditioner 200 according to an embodiment of the present invention, such as the compressor 1, the outdoor heat exchanger 2, the throttling device 3, the first fan 51, the second fan 52, the four-way valve 8, etc., and operations thereof, are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present invention, it is to be understood that "the first feature" and "the second feature" may include one or more of the features.
In the description herein, references to the description of the terms "some embodiments," "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 (9)
1. A control method of an air conditioner is characterized in that the air conditioner is provided with a first indoor air outlet and a second indoor air outlet, the air conditioner comprises a first indoor heat exchanger and a second indoor heat exchanger which are connected in parallel, the first indoor heat exchanger is opposite to the first indoor air outlet, the second indoor heat exchanger is opposite to the second air outlet,
the control method comprises the following steps:
s1, receiving air outlet temperature difference grade instructions of the first indoor air outlet and the second indoor air outlet, and obtaining an air outlet temperature difference grade TNThe expected air outlet temperature difference range of the first indoor air outlet and the second indoor air outlet is obtained;
s2, adjusting the amount of refrigerant flowing through at least one of the first indoor heat exchanger and the second indoor heat exchanger according to the air outlet temperature difference grade instruction;
s3, determining the actual air outlet temperature difference delta T of the first indoor air outlet and the second indoor air outlet;
s4, if the actual outlet air temperature difference Delta T falls within the expected outlet air temperature difference range, keeping the refrigerant quantity flowing through the first indoor heat exchanger and the second indoor heat exchanger unchanged;
and S5, if the actual outlet air temperature difference Delta T falls outside the expected outlet air temperature difference range, adjusting the amount of refrigerant flowing through at least one of the first indoor heat exchanger and the second indoor heat exchanger until the actual outlet air temperature difference Delta T falls within the expected outlet air temperature difference range.
2. The method for controlling an air conditioner according to claim 1, wherein the step S3 specifically includes:
s31, respectively detecting a first surface temperature of the first indoor heat exchanger and a second surface temperature of the second indoor heat exchanger;
and S32, calculating the difference value between the first surface temperature and the second surface temperature to determine the actual air outlet temperature difference DeltaT of the first indoor air outlet and the second indoor air outlet.
3. The method for controlling an air conditioner according to claim 1, wherein the step S3 specifically includes:
s33, respectively detecting a first air outlet temperature of the first indoor air outlet and a second air outlet temperature of the second indoor air outlet;
and S34, calculating a difference value between the first air outlet temperature and the second air outlet temperature to determine the actual air outlet temperature difference DeltaT of the first indoor air outlet and the second indoor air outlet.
4. The control method of an air conditioner according to claim 1, wherein the actual outlet air temperature difference Δ T in step S3 is determined every predetermined time, and step S4 or S5 is performed according to the actual outlet air temperature difference Δ T until the actual outlet air temperature difference Δ T falls within the desired outlet air temperature difference range.
5. The method as claimed in claim 1, wherein the plurality of outlet air temperature difference levels includes a first outlet air temperature difference level T1And the second outlet temperature difference grade T2And the third outlet temperature difference grade T3And the fourth air outlet temperature difference grade T4And the fifth outlet temperature difference grade T5And the sixth outlet temperature difference grade T6And the seventh air-out temperature difference grade T7Eighth outlet temperature difference grade T8And ninth outlet temperature difference grade T9Wherein, the T is1、T2、T3、T4、T5、T6、T7、T8、T9Respectively satisfy:
T1＜-7℃；
-7℃≤T2＜-5℃；
-5℃≤T3＜-3℃；
-3℃≤T4＜-1℃；
-1℃≤T5≤1℃；
1℃＜T6≤3℃；
3℃＜T7≤5℃；
5℃＜T8≤7℃；
T9＞7℃。
6. the method as claimed in claim 1, wherein the air conditioner further includes a refrigerant control device for adjusting a flow rate of the refrigerant flowing through the first indoor heat exchanger and the second indoor heat exchanger, the refrigerant control device including an electric three-way valve;
step S2 specifically includes:
and adjusting the refrigerant control device to a preset step number according to the air outlet temperature difference grade instruction.
7. The method as claimed in claim 1, further comprising a refrigerant control device for adjusting a flow rate of the refrigerant flowing through the first indoor heat exchanger and the second indoor heat exchanger, and before the step S1, the method further comprising:
s01, the air conditioner enters a cooling operation mode;
and S02, controlling a first control port of the refrigerant control device, which is communicated with the first indoor heat exchanger, and a second control port of the refrigerant control device, which is communicated with the second indoor heat exchanger, to be completely opened.
8. The control method of an air conditioner according to claim 6 or 7, further comprising:
s6, receiving an instruction of stopping working of one of the first indoor heat exchanger and the second indoor heat exchanger;
s7, controlling a control port of the refrigerant control device, which is communicated with one of the first indoor heat exchanger and the second indoor heat exchanger, to be closed;
s8, detecting the current working frequency F of the compressor of the air conditioner;
s9, if the working frequency F is less than or equal to the first indoor heat exchanger and the second indoor heat exchangerMaximum frequency F allowed for the compressor when said one of the heaters is operatingLimit ofIf so, maintaining the current working frequency F; and
s10, if the working frequency F is larger than FLimit ofThen controlling the current operating frequency F of the compressor to be reduced to FLimit of。
9. An air conditioner characterized by employing the control method of the air conditioner according to any one of claims 1 to 8.
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Application publication date: 20210910 |