CN111380165B - Air conditioner and cleaning control method thereof - Google Patents
Air conditioner and cleaning control method thereof Download PDFInfo
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- CN111380165B CN111380165B CN201811654288.9A CN201811654288A CN111380165B CN 111380165 B CN111380165 B CN 111380165B CN 201811654288 A CN201811654288 A CN 201811654288A CN 111380165 B CN111380165 B CN 111380165B
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/43—Defrosting; Preventing freezing of indoor units
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F2013/221—Means for preventing condensation or evacuating condensate to avoid the formation of condensate, e.g. dew
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Chemical & Material Sciences (AREA)
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to an air conditioner and a cleaning control method thereof. The air conditioner comprises a shell and a heat exchanger positioned in the shell, wherein the shell is provided with an air inlet and an air outlet, the air outlet is provided with an air deflector, and when the air conditioner enters a self-cleaning mode of the heat exchanger, the air deflector is configured to enable air blown out of the air outlet to be introduced into the air inlet when the indoor environment temperature T1 is higher than or equal to a first temperature threshold Th1. The invention controls the position of the air deflector of the air conditioner, when the air temperature is too high, the air with lower temperature passing through the heat exchanger is led into the air inlet of the air conditioner, so that the air temperature on the surface of the heat exchanger is reduced, and the heat exchanger can frost or freeze.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to a cleaning control method of an air conditioner.
Background
Air conditioners tend to accumulate a large amount of dust on components, such as heat exchangers, during use. If the dust is not cleaned in time, the heat exchange performance of the heat exchanger is greatly reduced, and bacteria are easy to breed and mildew is easy to form.
Some air conditioners have an automatic cleaning function of a heat exchanger, and may be performed in a case where the air conditioner is idle. For example, the dust on the heat exchanger is frosted or frozen together with the water vapor in the air, then the frost or ice on the heat exchanger is melted, and the dust and the melted condensed water flow down together, so that the heat exchanger is cleaned. However, when the temperature of the air reaches a certain temperature, for example, above 25 degrees celsius during the frosting or freezing process of the heat exchanger, the heat exchanger cannot be frosted or frozen, and automatic cleaning of the heat exchanger cannot be achieved.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an air conditioner and a cleaning control method thereof, wherein the air conditioner can still control a heat exchanger to frost or ice when the heat exchanger cannot frost or ice due to overhigh air temperature, so that the heat exchanger can be automatically cleaned.
The invention provides an air conditioner to solve the technical problems, which comprises a shell and a heat exchanger positioned in the shell, wherein the shell is provided with an air inlet and an air outlet, the air outlet is provided with an air deflector, and when the air conditioner enters a self-cleaning mode of the heat exchanger, the air deflector is configured to lead air blown out from the air outlet into the air inlet when the indoor environment temperature T1 is higher than or equal to a first temperature threshold Th1. The technical scheme has the advantages that the position of the air deflector of the air conditioner is controlled, so that when the air temperature is too high, air with lower temperature passing through the heat exchanger is guided into the air inlet of the air conditioner, the air temperature on the surface of the heat exchanger is reduced, and the heat exchanger can be frosted or frozen.
In an embodiment of the invention, the air guiding plate rotates to the first angle range when the indoor ambient temperature T1 is higher than or equal to the first temperature threshold Th1, and rotates to the second angle range when the indoor ambient temperature T1 is lower than the first temperature threshold. The technical scheme has the advantage that the air inlet is guided by specifically controlling the position of the air guide plate.
In an embodiment of the invention, when the air guiding plate is in the first angle range, the air guiding plate is further configured to switch to the second angle range when the indoor ambient humidity H is lower than or equal to a second humidity threshold Th2, and to keep in the first angle range when the indoor ambient humidity H is higher than the second humidity threshold. The technical scheme has the advantage that air is supplied to the air conditioning object space when the environment humidity is low, so that the humidity of the inlet air is kept.
In an embodiment of the present invention, the air conditioner further includes: a temperature sensor for detecting an indoor ambient temperature T1; a controller electrically connected to the temperature sensor, the controller configured to: comparing the indoor environment temperature T1 with a first temperature threshold Th1, controlling the air deflector to be in the first angle range when the indoor environment temperature T1 is higher than or equal to the first temperature threshold Th1, and controlling the air deflector to be in the second angle range when the indoor environment temperature is lower than the first temperature threshold Th1. The technical scheme has the advantage that the position of the air deflector is controlled by detecting the ambient temperature, the ambient humidity and the temperature of the heat exchanger.
In an embodiment of the present invention, the air conditioner further includes: a temperature sensor for detecting an indoor ambient temperature T1; a humidity sensor for detecting the indoor environment humidity H; a controller electrically connected to the temperature sensor and the humidity sensor, the controller configured to: comparing the indoor environment temperature with a first temperature threshold, controlling the air deflector to be in the first angle range when the indoor environment temperature is higher than or equal to the first temperature threshold, and controlling the air deflector to be in the second angle range when the indoor environment temperature is lower than the first temperature threshold; when the air deflector is in the first angle range, comparing the indoor environment humidity with a humidity second threshold value, when the indoor environment humidity is lower than the humidity second threshold value, controlling the air deflector to be switched to the second angle range, and when the indoor environment humidity is higher than or equal to the humidity second threshold value, controlling the air deflector to be kept in the first angle range. The technical scheme has the advantage that the position of the air deflector is controlled by detecting the ambient temperature, the ambient humidity and the temperature of the heat exchanger.
In an embodiment of the invention, the controller is further configured to compare a heat exchanger temperature with a third temperature threshold Th3 and compare an indoor ambient humidity with a fourth humidity threshold Th4 when the air deflector is in the second angle range, and control the air deflector to switch to the first angle range when the heat exchanger temperature is higher than or equal to the third temperature threshold or the indoor ambient humidity is higher than or equal to the fourth humidity threshold Th4, otherwise control the air deflector to remain in the second angle range. The technical scheme has the advantages that when the temperature of the heat exchanger is higher or the humidity of the indoor environment is higher, air with lower temperature passing through the heat exchanger is introduced into the air inlet of the air conditioner, so that the temperature of the air on the surface of the heat exchanger is reduced, and the heat exchanger can be frosted or frozen.
In an embodiment of the invention, said first threshold value Th1 of the temperature is comprised between 23 ℃ and 27 ℃.
In an embodiment of the invention, said second humidity threshold Th2 is between 35% and 45%.
In an embodiment of the invention, said third temperature threshold Th3 is comprised between 1 ℃ and 4 ℃ and said fourth humidity threshold Th4 is comprised between 45% and 55%.
In an embodiment of the invention, the air conditioner further includes a wall attachment portion provided on the housing, and the air deflector and the wall attachment portion rotate in cooperation with each other to form an extended air duct for air blown out from the air outlet.
The invention also provides a cleaning control method of the air conditioner, which comprises the following steps: the method comprises the steps that after the air conditioner enters a self-cleaning mode of a heat exchanger, the indoor environment temperature T is obtained; determining the air guide angle of an air deflector of the air conditioner according to the indoor environment temperature T; controlling the air guide plate to guide air according to the determined air guide angle; the step of determining the air guide angle of the air guide plate according to the indoor environment temperature T comprises the following steps: comparing the indoor ambient temperature T1 with a first temperature threshold Th1; and determining the wind guide angle according to the comparison result of the indoor environment temperature T1 and the first temperature threshold Th1. The technical scheme has the advantage that the position of the air deflector is controlled by the temperature of the heat exchanger and the indoor environment humidity.
In an embodiment of the present invention, the step of determining the wind guiding angle according to a result of comparing the indoor ambient temperature T1 with a first temperature threshold Th1 includes: and judging whether the indoor environment temperature T1 is higher than or equal to a first temperature threshold Th1, and determining the air guide angle of the air guide plate when the indoor environment temperature T1 is higher than or equal to the first temperature threshold Th1, so that the air flow blown out by the air conditioner is introduced into the air conditioner again.
In an embodiment of the present invention, the step of determining the wind guiding angle according to a result of comparing the indoor ambient temperature T1 with a first temperature threshold Th1 includes: and judging whether the indoor environment temperature T1 is higher than or equal to a first temperature threshold Th1, and when the indoor environment temperature T1 is smaller than the first temperature threshold Th1, determining the air guide angle of the air guide plate to supply air to the air-conditioning target space.
In an embodiment of the present invention, after the step of obtaining the indoor ambient temperature T1, the method further includes: acquiring indoor environment humidity H; and judging whether the indoor environment humidity H is smaller than a second humidity threshold Th2, and when the indoor environment humidity H is smaller than the second humidity threshold Th2, determining that the air guide angle of the air guide plate is adjusted to the coanda angle.
In an embodiment of the present invention, after the step of determining the wind guiding angle according to the result of comparing the indoor ambient temperature T1 with the first temperature threshold Th1, the method further includes: acquiring the temperature T2 of a heat exchanger of the air conditioner or acquiring the indoor environment humidity H again; and comparing the temperature T2 of the heat exchanger with a third temperature threshold Th3, or comparing the indoor environment humidity H with a fourth humidity threshold Th4, and determining the air guide angle according to the comparison result.
In an embodiment of the present invention, the heat exchanger self-cleaning mode includes a frosting phase or an icing phase, and the step of obtaining the indoor ambient temperature T1 is performed after entering the frosting phase or the icing phase.
In the cleaning process of the heat exchanger, the invention utilizes the control of the position of the air deflector of the air conditioner to lead the air with lower temperature passing through the heat exchanger into the air inlet of the air conditioner when the air temperature is overhigh, thus reducing the air temperature on the surface of the heat exchanger and leading the heat exchanger to be frosted or frozen. On the other hand, the position of the air deflector is controlled by detecting the ambient temperature, the ambient humidity and the temperature of the heat exchanger, so that the frosting or icing process of the heat exchanger is more effectively controlled, and the frosting or icing efficiency of the heat exchanger is improved.
Drawings
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, wherein:
FIG. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a second schematic structural diagram of an air conditioner according to an embodiment of the present invention;
FIGS. 3A and 3B are schematic diagrams illustrating an air deflector of an air conditioner according to an embodiment of the present invention;
fig. 4 is a circuit block diagram of an air conditioner according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a cleaning control method of an air conditioner according to an embodiment of the present invention.
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 the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments disclosed below.
As used in this application and the appended claims, the terms "a," "an," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.
Fig. 1 is a schematic structural diagram of an air conditioner 100 according to an embodiment of the present invention. Referring to fig. 1, an air conditioner 100 includes a case 10 and a heat exchanger 11 positioned in the case. A front panel 16 is attached to the front surface side of the casing 10, an intake port 12 is provided at the top of the casing 10, and an outlet port 13 is provided at a position below the front panel 16 of the casing 10. During operation of the air conditioner 100, air is drawn into the air conditioner 100 from the air inlet 12 by the fan 24 (see fig. 3A) inside the air conditioner 100, passes through the heat exchanger 11, and is discharged from the air outlet 13. An air deflector 14 is arranged at the air outlet 13. The air guide plate 14 can rotate around a position near the root 14 a. Components of the air conditioner 100 not relevant to the present invention are not shown to avoid obscuring the focus of the present invention. In the embodiment of the present invention, the form of the air conditioner 100 is not limited to the horizontal wall-mounted unit shown in fig. 1, and may be a vertical wall-mounted indoor unit as disclosed in fig. 1B of CN206656428U, or a cabinet unit. In the vertical wall-mounted indoor unit, the air inlet can be positioned on two side surfaces or the rear side surface of the air conditioner, and the air outlet is positioned on the front side surface of the air conditioner. The air inlet of the cabinet air conditioner can be two side surfaces or a rear side surface, and the air outlet is positioned on the front side surface of the air conditioner.
In some examples, the air conditioner 100 may enter a heat exchanger self-cleaning mode. The heat exchanger self-cleaning mode may include a first stage and a second stage. Generally, the first and second stages are performed sequentially. The first stage may be a frosting stage or an icing stage. The second stage may be a ventilation stage or a heating stage. For example, the process of self-cleaning of the heat exchanger 11 is to first frost dust on the surface of the heat exchanger 11 together with moisture in the air in the heat exchanger self-cleaning mode of the air conditioner 100 (hereinafter referred to as a frosting stage); when the frosting stage is completed or after a certain period of time, the air conditioner 100 is switched to the ventilating mode, so that the dust on the surface of the heat exchanger 11 is melted with the frost (hereinafter, referred to as the defrosting stage), and the dust flows down along with the condensed water generated after melting along with the fins of the heat exchanger 11, thereby making the heat exchanger 11 self-cleaning. The frosting stage and the defrosting stage together constitute the self-cleaning process of the whole heat exchanger.
In an alternative embodiment, the air conditioner 100 may be in a heating mode to defrost, which is referred to as a heating phase. In the icing stage, the dust on the surface of the heat exchanger 11 is first frosted together with the moisture in the air, and the water after the frost melts a part of the frost is then frozen together with the frost. The frosting stage will be exemplified as the first stage, and the defrosting stage by ventilation or heating will be exemplified as the second stage.
As shown in fig. 1, the controller 21 (refer to fig. 4) of the air conditioner 100 may control the direction of the air deflector 14, thereby controlling the direction of the air blown out from the outlet 13 of the air conditioner 100.
In another embodiment, as shown in fig. 1, an additional wall 15, also called a coanda effect baffle, is provided near the location of the outlet 13. The coanda portion 15 is located below the front panel 16. The air conditioner 1 has a driving device therein to drive the auxiliary wall 15 to rotate. As shown in fig. 1, the driving means includes a motor 151, a transmission 152, and a rack gear 153. The transmission mechanism 152 is a gear structure connected between the motor 151 and the rack gear 153. The rack 153 has an arc shape, and one end of the rack 153 is connected to the attachment wall portion 15, and the other end is connected to the transmission mechanism 152 through a gear. The rack 153 is slidable about the center of its arc by the driving means, thereby moving the additional wall portion 15.
The controller 21 (see fig. 4) of the air conditioner may control the rotation of the coanda portion 15 independently, or may control the air deflector 14 and the coanda portion 15 to rotate in cooperation with each other to form an extended duct of air blown out from the outlet 13. As shown in fig. 1, the air deflector 14 and the coanda portion 15 cooperate to form an air passage obliquely downward at the air outlet 13. Referring to fig. 2, the controller 21 controls the auxiliary wall portion 15 to close with respect to the casing 10, and the air guide plate 14 is also in a closed state. When the air conditioner 100 is in the heat exchanger self-cleaning mode, the coanda portion 15 is opened to a predetermined angle with respect to the casing 10 (Kang Dajiao), whereby the coanda effect is exerted on the coanda portion 15, and the air blown out from the outlet 13 of the casing 10 is favorably guided to the ceiling or the like of the space to be air-conditioned.
As for further structure of the auxiliary wall portion 15 and its control mechanism, reference is made to application No. 201620701166.0 filed on 5.7.2016, which will not be expanded in detail.
In the embodiment of the present invention, the coanda portion 15 may be a coanda panel attached to the vicinity of the outlet 13 (as shown in fig. 1) or may be a coanda member provided on a housing panel (as shown in fig. 3A and 3B).
Fig. 4 is a circuit block diagram of the air conditioner 100 according to an embodiment of the present invention. Referring to fig. 4, the air conditioner 100 includes a controller 21, a temperature sensor 22, and a fan 24 in addition to the heat exchanger 11, the air guide plate 14, and the coanda portion 15 shown in fig. 1 and 2. The temperature sensor 22, the humidity sensor 23, and the blower 24 are electrically connected to the controller 21. Referring to fig. 3A, a temperature sensor 22 is provided inside the casing 10 of the air conditioner 100 for detecting the indoor ambient temperature T1.
In the present embodiment, when the air conditioner 100 frosts the heat exchanger 11 in the self-cleaning mode, the controller 21 may control the direction of the air deflector 14 according to the indoor ambient temperature T1. When the indoor ambient temperature T1 is higher than or equal to the first threshold Th1, the controller 21 controls the air deflector 14 to be located in the first angle range a, so that the air blown out from the air outlet 13 is introduced into the air inlet 12, and this mode of the air conditioner 100 is referred to as "return air short circuit"; when the indoor ambient temperature is lower than the first temperature threshold Th1, the controller 21 controls the air deflector 14 to be positioned in the second angle range B so that the outlet 13 blows air into the air-conditioning target space.
In the present embodiment, when the air guiding plate 14 is in the first angle range a, the air guiding plate 14 forms a certain angle with the horizontal plane. The angle is different for air conditioners 100 of different external designs. For example, in the air conditioner 100 shown in fig. 3A, when the angle a between the air deflector 14 and the horizontal plane is less than 5 degrees, a return air short circuit is formed. Here, the extension line of the wind deflector 14 from the root 14a to the tip 14b forms an angle with the horizontal plane.
When the air deflector 14 is in the second angular range B, the controller 21 also positions the coanda portion 15 such that the coanda portion 15 is at the coanda angle. That is, when the coanda portion 15 is in the coanda angular position, the air blown out of the outlet 13 of the air conditioner 100 can be directed toward the ceiling of the air-conditioned space. At this time, as shown in fig. 3B, the air guide plate 14 and the coanda portion 15 together place the outlet 13 in a mode of blowing air into the air-conditioned space. Thereafter, the air is diffused around the space to be air-conditioned along the ceiling, avoiding the direction of the short circuit of the return air. The air-conditioning target space is a space, such as a room, where air conditioning is performed by an air conditioner.
The present embodiment has the beneficial effects that when the indoor environment temperature T1 is high, the heat exchanger 11 cannot frost, and the controller 21 controls the direction of the air deflector 14, so that the air blown out from the air outlet 13 and having a temperature lower than the indoor environment temperature T1 enters the air inlet 12 of the air conditioner 100, thereby making the air on the surface of the heat exchanger 11 have a low temperature and satisfying the frosting condition.
In another embodiment, the air conditioner 100 further includes a humidity sensor 23. The humidity sensor 23 is provided inside the casing 10 of the air conditioner 100, and detects the indoor ambient humidity H. The controller 21 can control the direction of the air deflector 14 according to the indoor ambient humidity. When the air deflector 14 is located in the first angle range a and when the indoor environment humidity is smaller than the second humidity threshold T2, the controller 21 controls the position of the air deflector 14 to switch to the second angle range B; if the indoor ambient humidity H is higher than the second humidity threshold Th2, the controller 21 controls the air deflector 14 to maintain the first angle range a.
In the normal cooling mode for self-cleaning of the heat exchanger, the humidity of the air blown out from the air outlet 13 is lower than that of the air entering the air inlet 12. Therefore, when the air conditioner 100 is in the return air short-circuit mode, the air at the air outlet 13 directly enters the air inlet 12, that is, the air blown onto the heat exchanger 11 has a low humidity, and when the humidity of the air drops to a certain threshold Th2, the air does not have enough moisture on the heat exchanger 11 to frost. Therefore, the present embodiment has an advantage in that the influence of the indoor ambient humidity on the heat exchanger frosting is taken into consideration, when the indoor ambient humidity H is insufficient, the position of the air deflector 14 is switched to the second angle range B for blowing air into the air-conditioned space, and when the indoor ambient humidity H is higher than the threshold Th2 value, the position of the air deflector 14 is switched to the first angle range a.
It is understood that the controller 21 can control the air deflector 14 according to the indoor ambient temperature T1 and the indoor ambient humidity H at the same time.
In another embodiment, more than one sensor is included in the air conditioner 100. The air conditioner 100 includes a temperature sensor 22 for detecting a temperature of the heat exchanger in addition to the temperature sensor 22 for detecting the indoor ambient temperature T1. At this time, the temperature sensor 22 is disposed on the heat exchanger 11, and preferably, should be disposed on the surface of the heat exchanger 11. In this embodiment, the controller 21 of the air conditioner 100 controls the position of the air deflector 14 according to the temperature T2 of the heat exchanger 11 and the indoor ambient humidity H in addition to controlling the air deflector 14 according to the indoor ambient temperature T1 and the indoor ambient humidity H. Specifically, when the air deflector 14 is in the second angle range B, when the temperature of the heat exchanger 11 is higher than or equal to the third temperature threshold Th3 and the indoor ambient humidity H is higher than or equal to the fourth humidity threshold Th4, the controller 21 controls the air deflector 14 to switch to the first angle range a; otherwise, the controller 21 controls the air guiding plate 14 to maintain the second angle range B.
Fig. 5 is a flowchart illustrating a cleaning control method of an air conditioner according to an embodiment of the present invention. This method may be implemented in the air conditioner 100 shown in fig. 1-4 or variations thereof. Referring to fig. 5, the cleaning control method of the present embodiment includes:
in step 401, the controller 21 controls the air conditioner 100 to start frosting in the heat exchanger self-cleaning mode. At the start of the frost formation, condensed water is generated on the surface of the heat exchanger 11. Additionally or alternatively, the air conditioner 100 may also have a dedicated frosting mode in which the surface of the heat exchanger 11 is frosted. In the frosting mode, the fan 24 of the air conditioner 100 may be operated at the lowest wind level. In a normal cooling mode in which the heat exchanger is self-cleaning, the air deflector 14 of the air conditioner 100 is positioned in the second angular range B even if the outlet 13 blows air toward the air-conditioned space.
In step 402, the indoor ambient temperature T1 is compared with a first temperature threshold Th1. The detection of the indoor ambient temperature T1 may be set to be performed at intervals, or may be performed in real time. If the indoor ambient temperature T1 is higher than or equal to the first temperature threshold Th1, go to step 403; otherwise, go to step 405.
In step 403, when the indoor ambient temperature T1 is higher than or equal to the first temperature threshold Th1, the controller 21 controls the air deflector 14 to make the air deflector 14 in the first angular range a. The first threshold value Th1 is a temperature value (e.g., a value between 23 ℃ and 27 ℃). In a normal cooling mode in which the heat exchanger is self-cleaning, indoor air enters the air conditioner 11 from the air inlet 12 and is blown toward the heat exchanger 11 by the fan 24, and since the indoor ambient temperature T1 is higher than or equal to the first temperature threshold Th1, that is, the temperature of the air blown toward the surface of the heat exchanger 11 is also higher than or equal to the first temperature threshold Th1, the surface of the heat exchanger 11 cannot be frosted. At this time, the controller 21 controls the air deflector 14 to be in the first angle range a, that is, the air blown out from the air outlet 13 is introduced into the air inlet 12, so as to form a return air short circuit. Since the air blown out from the air outlet 13 is already the air with a lower temperature outputted in the self-cleaning mode of the heat exchanger, the temperature is lower than the first threshold Th1, so that the temperature requirement in the frosting stage can be satisfied. At this step 403, the heat exchanger 11 begins to frost.
In step 403, the controller 21 also controls the position of the additional wall 15 so as not to prevent the formation of a short circuit in the return air.
In step 404, the indoor ambient humidity H is compared with a second humidity threshold Th2. The detection of the indoor environment humidity can be set to be performed once every a period of time, and can also be real-time detection. If the indoor ambient humidity is lower than or equal to the second humidity threshold Th2, go back to step 403; otherwise, go to step 405. The second humidity threshold Th2 is a percentage value (e.g., a value between 35% and 45%) indicating humidity. At this step 404, the initial position of the air deflection plate 14 is within the first angular range a. When the detected indoor ambient humidity is lower than or equal to the second humidity threshold T2, that is, the current indoor ambient humidity can meet the humidity requirement in the frosting stage, and the air humidity blown to the surface of the heat exchanger 11 is not too low due to the short circuit of the return air, the angle of the air deflector 14 is kept unchanged.
In step 405, when the indoor ambient temperature T1 is less than the first temperature threshold Th1 or when the indoor ambient humidity is less than the second humidity threshold Th2, the controller 21 controls the air guiding plate 14 to make the air guiding plate 14 be in the second angle range B. When the indoor ambient temperature T1 is less than the first temperature threshold Th1, that is, the current indoor ambient temperature T1 is not so high that the heat exchanger 11 cannot be frosted, and thus the mode of the return air short circuit does not need to be used. When the indoor ambient humidity H is less than the second humidity threshold Th2, that is, the current indoor ambient humidity is low, it is not suitable for the mode of using the return air short circuit. Therefore, in this step, the air deflector 14 is positioned in the second angular range B in which air is blown into the air-conditioned space.
In step 405, the controller also controls the position of the additional wall portion 15 to be at the coanda angular position, thereby forming a mode of blowing air into the air conditioning target space together with the air guide plate 14.
In step 406, the temperature T2 of the heat exchanger 11 is compared with the third threshold temperature T3, and the indoor ambient humidity H is compared with the fourth threshold humidity Th4. When the heat exchanger temperature T2 is higher than or equal to the third threshold value Th3 and the indoor ambient humidity H is higher than or equal to the fourth threshold value Th4, the controller 21 controls the air deflector 14 to switch to the first angle range a, that is, the return air short-circuit mode. Otherwise, the controller 21 controls the air deflection plate 14 to remain in the second angular range B. In this step, the temperature T2 of the heat exchanger 11 and the indoor ambient humidity H may be detected at regular intervals, or may be detected in real time.
The third temperature threshold Th3 is a temperature value (e.g., a value between 1 ℃ and 4 ℃), and when the temperature T2 of the heat exchanger 11 is higher than or equal to the third temperature threshold Th3, frost formation on the surface of the heat exchanger 11 cannot occur.
The fourth humidity threshold Th4 is a percentage value (e.g., a value between 45% and 55%) indicating humidity. Also as the threshold value for humidity determination, the fourth threshold value Th4 is larger than the second threshold value Th2 for humidity. In this way, at step 405, the air deflector 14 is switched to the second angular range B, and the air is blown into the air-conditioned space. At this time, moisture in the air enters the heat exchanger 11 again, so that the humidity of the air near the heat exchanger 11 gradually increases from the humidity second threshold Th2 or less until the humidity increases to the humidity fourth threshold Th4, and the controller 21 controls the air conditioner 100 to be in the return air short-circuit mode again to accelerate the formation of frost.
For example, when it is detected that the temperature T2 of the heat exchanger 11 is greater than or equal to 2 ℃ or the indoor ambient humidity H is greater than or equal to 50%, the air deflector 14 is controlled to be in the first angular range a where the return air is short-circuited, otherwise, the air deflector 14 is controlled to be in the second angular range B where the air is blown to the air-conditioning target space. Specifically, for the frosting stage, the temperature of the heat exchanger 11 is 2 ℃ or higher, which is not favorable for the formation of frosting. Therefore, the air with lower temperature cooled by the air conditioner 100 is introduced into the air inlet 12 through the return air short circuit and blown to the surface of the heat exchanger 11, which helps the heat exchanger 11 to cool down, thereby facilitating the formation of frost. Similarly, a humidity of 50% or higher in the indoor environment is also beneficial to the formation of frost, and can compensate for the reduction in the humidity of the air on the surface of the heat exchanger 11 due to the short circuit of the return air. When it is detected that the temperature T2 of the heat exchanger 11 is 2 ℃ or higher or the indoor ambient humidity H is 50% or higher, the controller 21 may put the air conditioner 100 in a state of a return air short circuit to accelerate the formation of frost.
In step 407, it is determined whether the frosting stage is complete. Step 407 is not followed sequentially by step 406. After the air conditioner 100 starts to perform frosting, the air conditioner 100 determines whether the frosting stage is completed during the above-mentioned steps 402 to 406.
The method of judging whether the frosting stage is completed may be performed by detecting the temperature of the surface of the heat exchanger 11. In one embodiment, the frosting stage is determined to have been completed when the temperature of the surface of the heat exchanger 11 reaches (e.g., is less than or equal to) a certain target temperature. However, since the accuracy of frost formation determination is insufficient due to the disturbance of the indoor ambient temperature, the abnormal operating condition of the evaporator, and the like, which are determined only by the temperature value, in another embodiment, the rate of decrease of the surface temperature of the heat exchanger 11 is calculated, and when the rate of decrease reaches (e.g., is lower than or equal to) a predetermined rate value, it is determined that the frost formation stage is completed. The temperature drop characteristic of the surface of the heat exchanger 11 during the frosting process can be known through a previous experiment, thereby determining the preset condition of this step. It will be appreciated that the determination of whether the frosting phase is complete may also be made by combining both the temperature of the heat exchanger 11 surfaces and the rate of descent. In other embodiments, whether the frosting stage is completed may also be determined according to the running time of the frosting stage. If the determination result in step 407 is negative, the air conditioner 100 continues to frost. And proceeds to execute the current step of steps 402 through 407.
The temperature of the surface of the heat exchanger 11 may be detected by the surface temperature sensor 22 provided in the heat exchanger 11 as described above. The detection of whether the frosting stage is finished or not can be set to be performed once every a period of time, and can also be real-time detection.
In step 408, a defrosting phase is performed. The controller 21 may defrost with the air conditioner 100 in the ventilation mode. Generally, the controller 21 may cause the fan 24 to have a higher rotational speed for ventilation. In one embodiment, the speed of the fan 24 may also be increased as the room temperature increases. In the ventilation mode, the controller 21 may continuously detect whether the ventilation time reaches a preset time, and if so, cause the air conditioner 100 to end the defrosting stage; otherwise, the air conditioner is enabled to continue ventilation operation. Here, the defrosting stage may be completed when the frost is melted into water, or may be completed when the water in the frost is drained or dried after the frost is melted.
Flow charts are used herein to illustrate operations performed by methods according to embodiments of the present application. It should be understood that the preceding operations are not necessarily performed in the exact order in which they are performed. Rather, various steps may be processed in reverse order or simultaneously. At the same time, other operations are either added to or removed from these processes.
It is understood that the parameters of the first temperature threshold Th1, the second humidity threshold Th2, the third temperature threshold Th3, and the fourth humidity threshold Th4 mentioned in the embodiments of the present disclosure are exemplary, and in a specific application, are not limited to the specific numbers described herein.
This application uses specific language to describe embodiments of the application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means a feature, structure, or characteristic described in connection with at least one embodiment of the application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.
Although the present invention has been described with reference to the present specific embodiments, it will be appreciated by those skilled in the art that the above embodiments are merely illustrative of the present invention and that various equivalent changes or substitutions may be made without departing from the spirit of the invention, and therefore, changes and modifications to the above embodiments within the spirit of the invention are intended to fall within the scope of the appended claims.
Claims (16)
1. An air conditioner comprises a shell and a heat exchanger positioned in the shell, wherein the shell is provided with an air inlet, an air outlet and an auxiliary wall part, the air outlet is provided with an air deflector, when the air conditioner enters a self-cleaning mode of the heat exchanger, the air deflector is configured to be matched with the auxiliary wall part to form an extended air duct of air blown out from the air outlet, and therefore the air blown out from the air outlet is led into the air inlet when the indoor environment temperature T1 is higher than or equal to a first temperature threshold Th1.
2. The air conditioner according to claim 1, wherein the air guide plate is rotated to a first angle range when the indoor ambient temperature T1 is higher than or equal to the first temperature threshold Th1, and is rotated to a second angle range when the indoor ambient temperature T1 is lower than the first temperature threshold.
3. The air conditioner of claim 2, wherein the air deflector is further configured to switch to the second angular range when the indoor ambient humidity H is less than or equal to a humidity second threshold Th2 when in the first angular range and to remain in the first angular range when the indoor ambient humidity H is greater than the humidity second threshold.
4. The air conditioner according to claim 2, further comprising:
a temperature sensor for detecting an indoor ambient temperature T1;
a controller electrically connected to the temperature sensor, the controller configured to:
comparing the indoor environment temperature T1 with a first temperature threshold Th1, controlling the air deflector to be in the first angle range when the indoor environment temperature T1 is higher than or equal to the first temperature threshold Th1, and controlling the air deflector to be in the second angle range when the indoor environment temperature is lower than the first temperature threshold Th1.
5. The air conditioner according to claim 3, further comprising:
a temperature sensor for detecting an indoor ambient temperature T1;
a humidity sensor for detecting the indoor environment humidity H;
a controller electrically connected to the temperature sensor and the humidity sensor, the controller configured to:
comparing the indoor environment temperature with a first temperature threshold, controlling the air deflector to be in the first angle range when the indoor environment temperature is higher than or equal to the first temperature threshold, and controlling the air deflector to be in the second angle range when the indoor environment temperature is lower than the first temperature threshold;
when the air deflector is in the first angle range, comparing the indoor environment humidity with a humidity second threshold value, when the indoor environment humidity is lower than the humidity second threshold value, controlling the air deflector to be switched to the second angle range, and when the indoor environment humidity is higher than or equal to the humidity second threshold value, controlling the air deflector to be kept in the first angle range.
6. The air conditioner of claim 5, wherein the controller is further configured to compare a heat exchanger temperature to a third temperature threshold Th3 and compare an indoor ambient humidity to a fourth humidity threshold Th4 when the air deflector is in the second angular range, and to control the air deflector to switch to the first angular range when the heat exchanger temperature is greater than or equal to the third temperature threshold or the indoor ambient humidity is greater than or equal to the fourth humidity threshold Th4, and otherwise to control the air deflector to remain in the second angular range.
7. The air conditioner according to claim 1, wherein the temperature first threshold Th1 is between 23 ℃ and 27 ℃.
8. The air conditioner according to claim 3, wherein the humidity second threshold Th2 is between 35% and 45%.
9. The air conditioner according to claim 6, wherein said third threshold value Th3 of temperature is between 1 ℃ and 4 ℃ and said fourth threshold value Th4 of humidity is between 45% and 55%.
10. The air conditioner of claim 1, wherein the air deflection plate and the wall attachment rotate in cooperation with each other.
11. A cleaning control method of an air conditioner for controlling the air conditioner as claimed in any one of claims 1 to 10, the method comprising the steps of:
the method comprises the steps that after the air conditioner enters a self-cleaning mode of a heat exchanger, the indoor environment temperature T is obtained;
determining the air guide angle of an air deflector of the air conditioner according to the indoor environment temperature T;
controlling the air guide plate to guide air according to the determined air guide angle;
the step of determining the air guide angle of the air guide plate according to the indoor environment temperature T comprises the following steps:
comparing the indoor ambient temperature T1 with a first temperature threshold Th1;
and determining the wind guide angle according to the comparison result of the indoor environment temperature T1 and the first temperature threshold Th1.
12. The cleaning control method of an air conditioner according to claim 11, wherein the step of determining the air guide angle based on the result of comparing the indoor ambient temperature T1 with a first temperature threshold Th1 includes:
and judging whether the indoor environment temperature T1 is higher than or equal to a first temperature threshold Th1, and when the indoor environment temperature T1 is higher than or equal to the first temperature threshold Th1, determining the air guide angle of the air guide plate so that the airflow blown out by the air conditioner is introduced into the air conditioner again.
13. The cleaning control method of an air conditioner according to claim 11, wherein the step of determining the air guide angle based on the result of comparing the indoor ambient temperature T1 with a first temperature threshold Th1 includes:
and judging whether the indoor environment temperature T1 is higher than or equal to a first temperature threshold Th1, and when the indoor environment temperature T1 is smaller than the first temperature threshold Th1, determining the air guide angle of the air guide plate to enable the air outlet of the air conditioner to supply air to the air conditioning target space.
14. A cleaning control method for an air conditioner according to any one of claims 11-13, wherein the step of determining the angle of air guiding according to the result of comparing the indoor ambient temperature T1 with the first temperature threshold Th1 further comprises:
acquiring indoor environment humidity H;
and judging whether the indoor environment humidity H is smaller than a second humidity threshold Th2, and when the indoor environment humidity H is smaller than the second humidity threshold Th2, determining the air guide angle of the air guide plate to enable the air outlet of the air conditioner to supply air to the air conditioning target space.
15. The cleaning control method of an air conditioner according to claim 14, further comprising, after said step of obtaining the indoor ambient humidity H:
acquiring the temperature T2 of a heat exchanger of the air conditioner or acquiring the indoor environment humidity H again;
and comparing the temperature T2 of the heat exchanger with a third temperature threshold Th3, or comparing the indoor environment humidity H with a fourth humidity threshold Th4, and determining the air guide angle according to the comparison result.
16. The cleaning control method of an air conditioner according to claim 11, wherein the heat exchanger self-cleaning mode includes a frost formation stage or an icing stage, and the step of obtaining the indoor ambient temperature T is performed after entering the frost formation stage or the icing stage.
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