CN113048570A - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
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- CN113048570A CN113048570A CN201911382460.4A CN201911382460A CN113048570A CN 113048570 A CN113048570 A CN 113048570A CN 201911382460 A CN201911382460 A CN 201911382460A CN 113048570 A CN113048570 A CN 113048570A
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
- F24F1/0033—Indoor units, e.g. fan coil units characterised by fans having two or more fans
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
- F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0083—Indoor units, e.g. fan coil units with dehumidification means
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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
- F24F11/32—Responding to malfunctions or emergencies
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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
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Fluid Mechanics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the technical field of air conditioners, and particularly provides an air conditioner and a control method thereof, aiming at solving the problem that condensation is easily generated on the lower surface of a bottom plate of a lower shell of a refrigeration mode of an indoor unit of the existing air conditioner. The indoor unit of the air conditioner comprises a shell, wherein the shell is provided with an air outlet, a heat exchanger and a water pan are arranged in the shell, a first air duct and a second air duct which are connected to the air outlet are respectively formed between the water pan and a top plate and a bottom plate of the shell, the heat exchanger is positioned in the first air duct, a fan assembly is also arranged in the shell, and can continuously supply air to the first air duct and selectively supply air to the second air duct; the control method comprises the following steps: enabling the fan assembly to supply air to the first air duct; acquiring the humidity of indoor air in a refrigeration mode; the fan assembly selectively supplies air to the second air duct according to the humidity of the indoor air. Therefore, the condensate water generated on the lower surface of the bottom plate is avoided, the air supply capacity of the fan assembly can be fully utilized, and the refrigeration effect of the indoor unit is ensured.
Description
Technical Field
The invention relates to the technical field of air conditioners, and particularly provides an air conditioner and a control method thereof.
Background
With the improvement of the level of people, the air conditioner is generally applied to the daily life of people. In hot summer, the refrigerant is driven by the compressor to circulate in the circulation pipeline. The refrigerant evaporates and absorbs heat in the evaporator of the indoor unit of the air conditioner, and the air flows through the outer surface of the evaporator and exchanges heat with the evaporator to become low-temperature airflow under the action of the fan, so that the ambient temperature in a room is reduced, and the comfort level of a user is improved.
Generally, a water pan is disposed below the evaporator for receiving the condensed water generated on the surface of the evaporator to prevent the condensed water from dropping to the electrical device to cause short circuit and malfunction. The water receiving tray is contacted with the bottom plate of the indoor unit shell. Because the comdenstion water temperature is lower, and a large amount of comdenstion water are gathered and are made the bottom plate temperature of indoor unit casing lower in the water collector, and the condensation easily appears on the bottom plate lower surface that the vapor in the indoor air meets indoor unit casing, and the condensation drips and causes the floor dirty damage even.
Accordingly, there is a need in the art for a new solution to the above problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problem that the lower surface of the bottom plate of the casing of the indoor unit of the air conditioner is easy to generate condensation in the cooling mode, the invention provides a control method of the air conditioner, the air conditioner comprises an air conditioner indoor unit, the air conditioner indoor unit comprises a shell, the shell is provided with an air outlet, a heat exchanger and a water pan are arranged in the shell, a first air duct connected to the air outlet is formed between the water pan and the top plate of the shell, the heat exchanger is positioned in the first air duct, a second air duct connected to the air outlet is formed between the water pan and the bottom plate of the shell, a fan assembly is arranged in the shell and can continuously supply air to the first air duct so as to facilitate the heat exchange between the airflow and the heat exchanger, and selectively supplying air to the second air duct in the process of supplying air to the first air duct; the control method comprises the following steps: enabling the fan assembly to supply air to the first air duct; acquiring the humidity of indoor air in a refrigeration mode; the fan assembly selectively supplies air to the second air duct according to the humidity of the indoor air.
In a preferred embodiment of the above control method, the step of "the fan assembly selectively supplies air to the second air duct according to the humidity of the indoor air" includes: and under the condition that the humidity of the indoor air is greater than a preset humidity threshold value, controlling the fan assembly to supply air to the second air duct.
In a preferred technical solution of the above control method, the step of "the fan assembly selectively supplies air to the second air duct according to the humidity of the indoor air" specifically includes: and under the condition that the duration that the humidity of the indoor air is greater than the preset humidity threshold exceeds the preset duration, controlling the fan assembly to supply air to the second air duct.
In a preferred technical solution of the above control method, the step of "controlling the fan assembly to supply air to the second air duct" further includes: and according to the difference value between the humidity of the indoor air and the preset humidity threshold value, the fan assembly supplies air to the second air duct in a set mode, wherein a preset mapping relation is formed between the set mode and the difference value.
In a preferred embodiment of the control method, the setting mode is at least related to a flow area of the second air duct.
In a preferred technical solution of the above control method, the fan assembly includes a first group of fans and a second group of fans, each of the first group of fans and the second group of fans includes at least one fan, the first group of fans is used for continuously supplying air to the first air duct, and the second group of fans can selectively supply air to the second air duct.
In a preferred technical solution of the above control method, the set mode is further related to an operation state of the second group of fans.
In a preferred technical solution of the above control method, the casing includes a switching mechanism, the switching mechanism includes a base, the base is provided with a first air port, a second air port and a third air port, the first air port and the second air port are both aligned with the first air duct, the third air port is aligned with the second air duct, the first set of fans is communicated with the first air port, the second set of fans is communicated with the second air port and the third air port, and the switching baffle is slidably disposed at a position of the base corresponding to the second air port and the third air port, so that the switching baffle can shield at least a portion of the second air port and the third air port.
In a preferred embodiment of the control method, the step of "selectively supplying air into the second duct according to the humidity of the indoor air" includes: and controlling the second group of fans to supply air to the first air duct under the condition that the humidity of the indoor air is not greater than a preset humidity threshold value.
The air conditioner comprises an air conditioner indoor unit, the air conditioner indoor unit comprises a shell, the shell is provided with an air outlet, a heat exchanger and a water pan are arranged in the shell, a first air duct connected to the air outlet is formed between the water pan and a top plate of the shell, the heat exchanger is positioned in the first air duct, a second air duct connected to the air outlet is formed between the water pan and a bottom plate of the shell, a fan assembly is further arranged in the shell, the fan assembly can continuously supply air to the first air duct so that air flow can exchange heat with the heat exchanger, and selectively supplies air to the second air duct in the process of supplying air to the first air duct; the control method comprises the following steps: enabling the fan assembly to supply air to the first air duct; acquiring the humidity of indoor air in a refrigeration mode; the fan assembly selectively supplies air to the second air duct according to the humidity of the indoor air.
In the refrigeration mode, condensed water generated on the surface of a heat exchanger of the indoor unit of the air conditioner drips and is collected in the water pan. Along with the heat conduction, the temperature of the bottom plate of the shell can be reduced, and the indoor air is easy to generate condensation when contacting with the lower surface of the bottom plate. The greater the humidity of the indoor air, the more likely the lower surface of the bottom plate of the case is to generate condensed water. Under the refrigeration mode, the fan subassembly acquires the humidity of room air to first wind channel air supply, according to the humidity selectivity of room air to the air supply of second wind channel, has avoided the bottom plate of casing to produce the condition of condensation. For example, in the process that the fan assembly supplies air to the first air duct, the cold energy of condensed water in the water pan is conducted to the bottom plate to reduce the temperature of the bottom plate to a certain temperature, if the humidity of indoor air is greater than a preset humidity threshold value, condensed water is generated on the lower surface of the bottom plate, the fan assembly is controlled to supply air to the second air duct at the same time, the air flow flowing in the second air duct separates the water pan from the bottom plate of the shell, and the cold energy conducted by the water pan is rapidly conducted out by the flowing air flow, so that the condition that the temperature of the bottom plate is too low and condensation is generated on the lower surface of the bottom plate due to the conduction of the cold energy of the condensed water in the water pan to the bottom plate is avoided, the condition that the condensation drips on the floor to cause dirt on the floor or even damage is avoided, and the use experience of; if the humidity of the indoor air is not larger than the preset humidity threshold value, the possibility that condensate water is produced on the lower surface of the bottom plate is very low, the fan assembly does not need to supply air to the second air duct, the fan assembly can supply air to the first air duct in a full-force mode, and therefore the refrigerating effect of the indoor unit of the air conditioner is improved.
Preferably, the step of "controlling the fan assembly to supply air to the second air duct" further comprises: and according to the difference value between the humidity of the indoor air and the preset humidity threshold value, the fan assembly supplies air to the second air duct in a set mode, wherein a preset mapping relation is formed between the set mode and the difference value. For example, the flow area of the second air duct is set according to the difference between the humidity of the indoor air and a preset humidity threshold. When the humidity of the indoor air is greater than the preset humidity threshold value, air needs to be supplied to the second air duct to avoid the lower surface of the bottom plate of the shell from generating condensed water, and the higher the humidity of the indoor air is, the more easily the lower surface of the bottom plate of the shell generates the condensed water. If the total air supply quantity of the fan assembly is not changed, the fan assembly supplies air to the first air channel and the second air channel simultaneously, the flow area of the second air channel is set according to the difference value between the humidity of the indoor air and the preset system threshold value, the air supply quantity of the fan assembly to the second air channel is matched with the difference value between the humidity of the indoor air and the preset system threshold value, and therefore the purpose that the cold quantity transmitted by the water receiving disc is rapidly guided out is achieved, the cold quantity of condensed water in the water receiving disc is prevented from being transmitted to the bottom plate, the temperature of the bottom plate is too low, the residual air supply capacity of the fan assembly can be used for supplying air to the first air channel, and the refrigeration effect of the indoor unit of the air conditioner is guaranteed.
In addition, the invention also provides an air conditioner, which comprises a controller, wherein the controller is used for executing the control method of the air conditioner in any one of the technical schemes of the control method of the air conditioner. It should be noted that, the air conditioner indoor unit has all the technical effects of the control method of the air conditioner, and is not described herein again.
Drawings
Preferred embodiments of the present invention will now be described in connection with an air duct type air conditioning indoor unit with reference to the accompanying drawings, in which:
fig. 1 is an exploded schematic structural diagram of an air duct type air conditioner indoor unit according to an embodiment of the invention;
FIG. 2 is a schematic view of an assembly of an indoor unit of an air duct type air conditioner according to an embodiment of the present invention;
FIG. 3 is a half-sectional view of an indoor unit of an air duct type air conditioner according to an embodiment of the present invention (the second air duct is in an air intake state);
FIG. 4 is a second half-sectional view of the indoor unit of the duct type air conditioner according to an embodiment of the present invention (the second duct is in a non-air intake state);
fig. 5 is a flowchart of a control method of an air conditioner of the present invention;
fig. 6 is a logic diagram of a control method of an air conditioner according to the present invention.
List of reference numerals:
1. a housing; 11. a top plate; 12. a side plate; 13. a base plate; 14. an air outlet; 2. a heat exchanger; 3. a water pan; 41. a first fan; 42. a second fan; 43. a motor; 5. a vertical partition plate; 51. a first tuyere; 52. a second tuyere; 53. a third tuyere; 54. switching a baffle; 61. a first air duct; 611. the air outlet side of the first air duct; 62. a second air duct; 621. the air outlet side of the second air duct.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the present invention has been described in connection with a ducted air conditioning indoor unit, those skilled in the art will appreciate that the present invention can be modified as needed to suit a particular application, such as a wall-mounted air conditioner, a cabinet air conditioner, etc. Obviously, the technical solution after adjustment still falls into the protection scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1 to 6, fig. 1 is an exploded schematic structural diagram of an air duct type air conditioning indoor unit according to an embodiment of the present invention, fig. 2 is an assembly schematic diagram of the air duct type air conditioning indoor unit according to the embodiment of the present invention, fig. 3 is a half-sectional diagram i (the second air duct is in an air intake state) of the air duct type air conditioning indoor unit according to the embodiment of the present invention, fig. 4 is a half-sectional diagram i (the second air duct is in a non-air intake state) of the air duct type air conditioning indoor unit according to the embodiment of the present invention, fig. 5 is a flowchart of a control method of an air conditioner according to the present invention, and fig. 6 is a logic diagram of the control method of the.
In order to solve the problem that condensation is easily generated on the lower surface of a bottom plate of a shell of an existing air-conditioning indoor unit in a refrigeration mode, the air-conditioning indoor unit comprises the air-conditioning indoor unit, the air-conditioning indoor unit comprises the shell, the shell is provided with an air outlet, a heat exchanger and a water pan are arranged in the shell, a first air duct connected to the air outlet is formed between the water pan and a top plate of the shell, the heat exchanger is located in the first air duct, a second air duct connected to the air outlet is formed between the water pan and the bottom plate of the shell, a fan assembly is further arranged in the shell and can continuously supply air to the first air duct so that air flow can exchange heat with the heat exchanger, and air can be selectively supplied to the second air duct in the air supply process of the first air. As shown in fig. 5, the control method of the indoor air conditioner includes the steps of:
s100, the fan assembly supplies air into the first air duct. If the air conditioner is in operation, the control fan assembly of the air conditioner supplies air to the first air duct.
And S200, acquiring the humidity of the indoor air in the refrigerating mode. For example, the indoor unit of the air conditioner acquires the humidity of the indoor air through a humidity sensor arranged on the indoor unit of the air conditioner, the humidity sensor is connected with a controller of the indoor unit of the air conditioner, and the humidity sensor transmits the detected humidity of the indoor air to the controller of the indoor unit of the air conditioner. In the cooling mode, the controller controls the humidity sensor to detect the humidity of the indoor air, and the humidity sensor transmits the detected humidity of the indoor air to the controller.
And S300, the fan assembly selectively supplies air to the second air duct according to the humidity of the indoor air. For example, in the process that the fan assembly supplies air to the first air duct, the controller judges whether to control the fan assembly to supply air to the second air duct according to the humidity of the indoor air sent by the humidity sensor. When the humidity of indoor air is greater than the preset humidity threshold value, the controller controls the fan assembly to supply air to the second air channel simultaneously, the air flow flowing in the second air channel separates the water pan from the bottom plate of the shell, the air flow flowing simultaneously guides out the cold quantity transferred out by the water pan rapidly, the condition that the temperature of the bottom plate is too low and condensation is generated on the lower surface of the bottom plate by conducting the cold quantity of condensed water in the water pan to the bottom plate is avoided, the condition that the condensation drips on the floor to cause floor dirt or even damage is avoided, and the use experience of a user is optimized. When the humidity of the indoor air is not larger than the preset humidity threshold value, the possibility that condensate water is generated on the lower surface of the bottom plate is very low, the controller controls the fan assembly to supply air only into the first air channel and not into the second air channel, the condensate water is not generated on the lower surface of the bottom plate of the shell, the fan assembly supplies air only into the first air channel, the air supply quantity in the first air channel is relatively increased, and the refrigerating efficiency of the indoor unit of the air conditioner is improved.
By the control method, the fan assembly selectively supplies air to the second air duct according to the humidity of the indoor air in the refrigeration mode, so that the condition that condensed water is generated on the bottom plate of the indoor unit of the air conditioner in the refrigeration mode is avoided, the refrigeration efficiency of the indoor unit of the air conditioner is relatively improved, and the use experience of a user is optimized. Those skilled in the art can understand that, in addition to the mode of acquiring the humidity of the indoor air through the humidity sensor arranged on the indoor unit of the air conditioner, those skilled in the art can flexibly adjust the acquisition mode of the humidity of the indoor air in practical application, for example, the humidity sensor can be independently arranged in the room, the humidity sensor on the humidifier or the humidity sensor on the intelligent device worn by the human body, etc., the humidity sensor is in communication connection with the controller of the indoor unit of the air conditioner through bluetooth, internet, etc., and the controller detects the humidity of the indoor air through the humidity sensor.
Preferably, the step of "controlling the fan assembly to supply air to the second air duct" further comprises: and according to the difference value between the humidity of the indoor air and the preset humidity threshold value, the fan assembly supplies air to the second air duct in a set mode, wherein a preset mapping relation is formed between the set mode and the difference value. Through such setting, can be according to the difference of the humidity of indoor air and preset humidity threshold value according to the mode air supply to the second wind channel of difference to air supply control is carried out to different air humidity conditions. For example, the flow area of the second air duct is set according to the difference between the humidity of the indoor air and a preset humidity threshold. The fan assembly comprises a fan, an air outlet of the fan is communicated with the first air channel and the second air channel through a three-way pipe, a valve is arranged in the second air channel, and the flow area of the second air channel is adjusted through the valve. When the humidity of the indoor air is greater than the preset humidity threshold value and the difference value between the humidity of the indoor air and the preset humidity threshold value is large, the opening degree of the valve is in a large state, the fan can send more air into the second air duct, a large amount of cold energy conducted from the water receiving disc can be discharged, and the phenomenon that the lower surface of the bottom plate of the shell generates condensate water due to the fact that the temperature of the bottom plate is too low is avoided; when the humidity of the indoor air is greater than the preset humidity threshold value and the difference value between the humidity of the indoor air and the preset humidity threshold value is small, the opening degree of the valve is in a small state, the fan can send less air into the second air channel, more air is sent into the first air channel, the temperature of the bottom plate of the shell is slightly reduced and condensed water is not easily generated due to the fact that the humidity of the indoor air is relatively small at the moment, a small amount of air can be sent into the second air channel, and the temperature of the bottom plate of the shell is prevented from being too low. Through the arrangement, the problem that condensate water is generated on the lower surface of the bottom plate is avoided, and the air supply capacity of the fan can be fully utilized to supply air to the first air duct to ensure the refrigeration effect of the indoor unit of the air conditioner.
Preferably, the preset humidity threshold is determined according to a set target temperature. Illustratively, the preset humidity threshold is set to 65% when the target temperature is set to 20 ℃, and to 80% when the target temperature is set to 27 ℃. The lower the set target temperature is, the lower the temperature of the indoor heat exchanger is, and the lower the temperature of the corresponding condensed water collected in the water pan is, and the more easily the condensation is generated on the lower surface of the bottom plate. And a humidity threshold value is set according to the temperature of the indoor air, so that whether air needs to be supplied to the second air channel to prevent the lower surface of the bottom plate from generating condensed water can be more accurately judged.
The following description will be made in detail with reference to an indoor unit of an air duct type air conditioner.
As shown in fig. 1 to 4, the air duct type air conditioner includes an air conditioning indoor unit, the air conditioning indoor unit includes a casing 1, the casing 1 includes a top plate 11 at an upper portion, a side plate 12 at a periphery, and a bottom plate 13 at a lower portion, the top plate 11, the side plate 12, and the bottom plate 13 at the lower portion are assembled together to form the casing 1, and an air outlet 14 is formed at a front side of the casing 1. A heat exchanger 2 and a water pan 3 are arranged in the shell 1, a first air duct 61 connected to the air outlet 14 is formed between the water pan 3 and the top plate 11, the heat exchanger 2 is arranged in the first air duct 61, and a second air duct 62 connected to the air outlet 14 is formed between the water pan 3 and the bottom plate 13. The casing 1 is also provided with a fan assembly, the fan assembly can continuously supply air into the first air duct 61 so that the air flow can exchange heat with the heat exchanger 2, and selectively supply air to the second air duct 62 in the process of supplying air to the first air duct 61.
The fan assembly comprises a first fan set and a second fan set, the first fan set comprises two first fans 41, the second fan set comprises a second fan 42, the second fan 42 is positioned between the two first fans 41, and impellers of the first fan 41 and the second fan 42 are synchronously connected through a same transmission shaft and driven by a motor 43. A switching mechanism is further disposed in the housing 1, and the fan assembly selectively supplies air to the second air duct 62 by adjusting the state of the switching mechanism. Specifically, the switching mechanism includes a base (such as a vertical partition plate 5) and a switching baffle 54, the base is disposed in the housing 1, the vertical partition plate 5 is provided with a first air opening 51 at a position close to the left and right sides, the vertical partition plate 5 is provided with a second air opening 52 and a third air opening 53 at a middle position, the second air opening 52 and the third air opening 53 are disposed adjacent to each other up and down, the first air opening 51 and the second air opening 52 are both aligned with the first air duct 61, and the third air opening 53 is aligned with the second air duct 62. The air outlets of the two first fans 41 communicate with the first air duct 61 by being aligned with the two first air ports 51, respectively. The outlet of the second fan 42 is aligned with the positions of the second and third air ports 52 and 53. The switching flap 54 is slidably provided at a position of the vertical partition 5 corresponding to the second and third air outlets 52 and 53, and the switching flap 54 is driven by a linear motor (not shown in the drawings). The first air duct outlet side 611 and the second air duct outlet side 621 are adjacently arranged on the side plate 12 and communicated with the air outlet 14. The indoor unit of the air conditioner is also provided with a controller (not shown in the figure) and a humidity sensor (not shown in the figure) connected with the controller.
Referring to fig. 3, 4 and 6, when the indoor unit of the air duct type air conditioner is in the cooling mode, the controller controls the humidity sensor to acquire the humidity of the indoor air, the controller determines the preset humidity threshold according to the set target temperature of the indoor unit of the air conditioner, if a mapping relation table of the preset humidity threshold and the set target temperature is stored in the memory of the indoor unit of the air conditioner, the controller searches the preset humidity threshold corresponding to the current set target temperature according to the mapping relation table, then judges the humidity of the indoor air and the preset humidity threshold, if the humidity of the indoor air is greater than the preset humidity threshold, the controller controls the second fan 42 to supply air to the second air duct 62, and if the humidity of the indoor air is not greater than the preset humidity threshold, the controller controls the second fan 42 to supply air to the first air duct 61.
Specifically, when the humidity of the indoor air is greater than the preset humidity threshold value and the second fan 42 needs to supply air to the second air duct 62, the controller controls the motor 43 to drive the first fan 41 and the second fan 42 to rotate, and controls the linear motor to drive the switching baffle 54 to slide to the second air opening 52, so that the second air opening 52 is closed, and the third air opening 53 is opened, so that the air outlet of the second fan 42 is communicated with the second air duct 62. When the humidity of the indoor air is not greater than the preset humidity threshold value and air supply to the second air duct 62 is not needed, the controller controls the motor 43 to drive the first fan 41 and the second fan 42 to rotate, and controls the linear motor to drive the switching baffle 54 to slide to the third air opening 53, so that the second air opening 52 is opened, and the third air opening 53 is closed, and the air outlet of the second fan 42 is communicated with the first air duct 61.
It will be understood by those skilled in the art that the number of the first fans 41 is 2, and the number of the second fans 42 is 1, which is only an exemplary description, and those skilled in the art can adjust the number as needed, such as the number of the first fans 41 is 1, 3, etc., and the number of the second fans 42 is 2, 3, etc.
In a preferred embodiment, when air needs to be supplied to the second air path 62, the flow area of the second air path 62 is set according to the difference between the humidity of the indoor air and the preset humidity threshold. If the difference δ between the indoor humidity RH and the set threshold RHt is calculated, the opening k of the third tuyere 53 is a × δ + b, a is a weighted value, and b is a corrected value. Wherein a is 1-4, such as a 1, 2, 3 or 4; the value range of b is 0.1-0.4, if b is 0.1, 0.2, 0.3 or 0.4, the values of a and b are different according to different fans, air ducts and the like of the indoor unit of the air conditioner, and specific values can be measured through experiments or selected according to empirical values.
For example, when the cooling power of the indoor unit of the air conditioner is low, the temperature of the surface of the heat exchanger 2 is relatively high, the temperature of the condensed water in the water receiving tray 3 is relatively high, and at this time, the switching baffle 54 is controlled to slide downwards for a certain distance from the state shown in fig. 3, so that the second air opening 52 and the third air opening 53 are both in the open state, and the flow cross-sectional area of the third air opening 53 is smaller than that of the second air opening 52. Most of the air flow sent by the second fan 42 enters the first air duct 61 through the second air opening 52, and a small part of the air flow sent by the second fan 42 enters the second air duct 62 through the third air opening 53. Therefore, the problem that condensation is generated on the lower surface of the bottom plate 13 due to too low temperature can be avoided, the air flow in the first air channel 61 can be relatively increased, the heat exchange amount is increased, and the refrigeration effect is further improved. When the refrigerating power of the indoor unit of the air conditioner is high, the temperature of the surface of the heat exchanger 2 is relatively low, the temperature of condensed water in the water receiving tray 3 is relatively low, and at the moment, the switching baffle plate 54 is controlled to slide downwards for a certain distance from the state shown in fig. 3, so that the second air opening 52 and the third air opening 53 are both in an open state, and the flow cross-sectional area of the third air opening 53 is larger than that of the second air opening 52. Thus, a small portion of the airflow sent by the second fan 42 enters the first air duct 61 through the second air opening 52, and a large portion of the airflow sent by the second fan 42 enters the second air duct 62 through the third air opening 53. And the opening degree of the third air port is determined according to the difference value between the humidity of the indoor air and the preset humidity threshold value. It should be noted that the linear increasing relationship between the flow area of the second air duct 62 and the difference between the humidity of the indoor air and the preset humidity threshold is only a specific setting manner, and a stepped increasing relationship may also be set.
In a more preferred embodiment, the first fan 41 and the second fan 42 are independent of each other. As shown in fig. 6, when the air duct type indoor unit of the air conditioner is in the cooling mode, the controller controls the humidity sensor to obtain the humidity of the indoor air, and determines the preset humidity threshold according to the set target temperature of the indoor unit of the air conditioner, for example, a mapping relation table between the preset humidity threshold and the set target temperature is stored in the memory of the indoor unit of the air conditioner, and the controller finds the preset humidity threshold corresponding to the current set target temperature according to the mapping relation table, and then determines the humidity of the indoor air and the size of the preset humidity threshold. If the humidity of the indoor air is greater than the preset humidity threshold, setting the rotating speed of the second fan 42 according to the difference value between the humidity of the indoor air and the preset humidity threshold, and controlling the second fan 42 to supply air to the second air duct 62; if the humidity of the indoor air is not greater than the preset humidity threshold, the second fan 42 is controlled to supply air to the first air duct 61 at the rated rotation speed. With such an arrangement, when air is supplied to the second air duct 62, the rotation speed of the second fan 42 is controlled according to the humidity of the indoor air, that is, the amount of air supplied into the second air duct 62 is adjusted according to the humidity of the indoor air, so that the problem of condensate water generation on the lower surface of the bottom plate is avoided, and the waste of electric energy is also avoided. It is to be understood that in the case where the number of the second fans is plural, the amount of air supplied into the second air duct 62 may be changed by changing the number of the second fans 42 that supply air into the second air duct 62.
Those skilled in the art can understand that the judgment of whether to supply air to the second air duct is only a specific judgment mode by comparing the humidity of the indoor air with the preset humidity threshold value, and those skilled in the art can adjust the judgment according to needs, if the humidity of the indoor air is continuously greater than the preset humidity threshold value and the preset duration value, if the humidity of the indoor air is continuously greater than the preset humidity threshold value, the fan assembly is controlled to supply air to the second air duct, and otherwise, the fan assembly does not supply air to the second air duct. Preferably, the preset time period is determined according to the set target temperature, and the lower the set target temperature is, the smaller the set time period is. When the set target temperature is lower, the outlet air temperature is lower, and condensation is more easily generated when the set target temperature is lower under the same humidity condition. If the preset duration is too long, the air supply to the second air duct is controlled by the fan assembly when the duration that the humidity of the indoor air is continuously greater than the preset humidity threshold exceeds the preset duration, and the lower surface of the bottom plate of the shell possibly generates condensed water, so that the use experience of a user is influenced. The preset time length is determined according to the set target temperature, the situation can be avoided, whether air is supplied to the second air channel or not is judged according to the time length when the humidity of the indoor air is continuously larger than the preset humidity threshold value and the preset time length, and the judgment result is more accurate.
In addition, the invention also provides an air conditioner which comprises an air conditioner indoor unit, wherein the air conditioner indoor unit comprises a controller, and the controller is used for executing the control method of any one of the technical schemes of the control method of the air conditioner indoor unit. It is understood that the air conditioner may be a wall-mounted air conditioner, a cabinet air conditioner, or the like.
It can be seen from the above description that in the technical scheme of the invention, the second air duct is arranged between the water pan of the indoor unit of the air conditioner and the bottom plate of the shell, and the fan assembly supplies air to the first air duct in the cooling mode and selectively supplies air to the second air duct according to the humidity of the indoor air, so that the purpose of rapidly guiding out the cold energy transmitted and guided out by the water pan and avoiding the cold energy of the condensed water in the water pan from being transmitted to the bottom plate to cause the temperature of the bottom plate to be too low is realized, and the residual air supply capacity of the fan assembly can be used for supplying air to the first air duct, thereby ensuring the cooling effect of the indoor unit of the air conditioner.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. The control method of the air conditioner is characterized in that the air conditioner comprises an air conditioner indoor unit, the air conditioner indoor unit comprises a shell, the shell is provided with an air outlet, a heat exchanger and a water pan are arranged in the shell, a first air duct connected to the air outlet is formed between the water pan and a top plate of the shell, the heat exchanger is located in the first air duct, a second air duct connected to the air outlet is formed between the water pan and a bottom plate of the shell, a fan assembly is further arranged in the shell, the fan assembly can continuously supply air to the first air duct so that air flow can exchange heat with the heat exchanger, and selectively supplies air to the second air duct in the air supply process of the first air duct;
the control method comprises the following steps:
enabling the fan assembly to supply air to the first air duct;
acquiring the humidity of indoor air in a refrigeration mode;
the fan assembly selectively supplies air to the second air duct according to the humidity of the indoor air.
2. The control method according to claim 1, wherein the step of "the fan assembly selectively supplies air to the second duct according to the humidity of the indoor air" includes:
and under the condition that the humidity of the indoor air is greater than a preset humidity threshold value, controlling the fan assembly to supply air to the second air duct.
3. The control method according to claim 1, wherein the step of selectively supplying air to the second air duct by the fan assembly according to the humidity of the indoor air specifically comprises:
and under the condition that the duration that the humidity of the indoor air is greater than the preset humidity threshold exceeds the preset duration, controlling the fan assembly to supply air to the second air duct.
4. The control method according to claim 2 or 3, wherein the step of controlling the fan assembly to supply air to the second air duct further comprises:
according to the difference value between the humidity of the indoor air and the preset humidity threshold value, the fan assembly supplies air to the second air duct in a set mode,
and a preset mapping relation is formed between the set mode and the difference value.
5. The control method according to claim 4, wherein the setting is related to at least a flow area of the second air duct.
6. The control method of claim 5, wherein the fan assembly includes a first set of fans and a second set of fans, each of the first and second sets of fans including at least one fan, the first set of fans configured to continuously supply air to the first air path, the second set of fans configured to selectively supply air to the second air path.
7. The control method of claim 6, wherein the manner of setting is further related to an operating state of the second group of fans.
8. The control method according to claim 6, wherein a switching mechanism is included in the housing, the switching mechanism includes a base body, a first air port, a second air port and a third air port are provided on the base body, the first air port and the second air port are both aligned with the first air duct, the third air port is aligned with the second air duct, the first set of fans are communicated with the first air port, the second set of fans are communicated with the second air port and the third air port, and the switching baffle is slidably provided at a position of the base body corresponding to the second air port and the third air port, so that the switching baffle can shield at least a portion of the second air port and the third air port.
9. The control method according to claim 8, wherein the step of selectively supplying air into the second duct according to the humidity of the indoor air includes:
and controlling the second group of fans to supply air to the first air duct under the condition that the humidity of the indoor air is not greater than a preset humidity threshold value.
10. An air conditioner characterized by comprising a controller for executing the control method of the air conditioner according to any one of claims 1 to 9.
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| CN201911382460.4A CN113048570B (en) | 2019-12-27 | 2019-12-27 | Air conditioner and control method thereof |
| PCT/CN2020/084378 WO2021128655A1 (en) | 2019-12-27 | 2020-04-13 | Air conditioner and control method therefor |
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| CN201911382460.4A CN113048570B (en) | 2019-12-27 | 2019-12-27 | Air conditioner and control method thereof |
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| CN114034203B (en) * | 2021-11-24 | 2023-07-18 | 杰瑞环保科技有限公司 | Heat exchanger system and cleaning method of heat exchanger |
| CN114484846B (en) * | 2022-02-23 | 2024-04-23 | 武汉海尔电器股份有限公司 | Wall-mounted air conditioner and condensation treatment method thereof |
| WO2024007486A1 (en) * | 2022-07-08 | 2024-01-11 | 广东美的制冷设备有限公司 | Air conditioner indoor unit and kitchen air conditioner set |
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| WO2021128655A1 (en) | 2021-07-01 |
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