CN108716714B - Air conditioner indoor unit and air mixing control method thereof - Google Patents
Air conditioner indoor unit and air mixing control method thereof Download PDFInfo
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- CN108716714B CN108716714B CN201810372532.6A CN201810372532A CN108716714B CN 108716714 B CN108716714 B CN 108716714B CN 201810372532 A CN201810372532 A CN 201810372532A CN 108716714 B CN108716714 B CN 108716714B
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000004378 air conditioning Methods 0.000 claims description 20
- 230000009467 reduction Effects 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 description 22
- 238000001816 cooling Methods 0.000 description 13
- 230000035939 shock Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 230000036541 health Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000004887 air purification Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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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
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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
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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
- F24F13/02—Ducting arrangements
- F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
- F24F13/062—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser having one or more bowls or cones diverging in the flow direction
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the field of air supply control of air conditioners, in particular to an air conditioner indoor unit and an air mixing control method thereof, aiming at solving the problems of cold and hot impact and air quality reduction of the existing air conditioner indoor unit, the invention provides the air conditioner indoor unit and the air mixing control method thereof, wherein the air conditioner indoor unit comprises a first air mixing air inlet communicated with an indoor space and a second air mixing air inlet communicated with an outdoor environment, and the air mixing control method comprises the following steps: acquiring air outlet temperature and air quality parameters of an indoor space; determining the opening and closing state of the first air mixing inlet according to the air outlet temperature, and determining the opening and closing state of the second air mixing inlet according to the air quality parameter; wherein the air quality parameter comprises at least one air parameter. Through the cooperation of mixing the air with mixing.
Description
Technical Field
The invention relates to the field of air supply control of an air conditioner indoor unit, in particular to an air conditioner indoor unit capable of optimizing air supply quality and an air mixing control method thereof.
Background
The air inlet source of the prior embedded air conditioner indoor unit is air of an indoor space. The air inlet grille and the air outlet of the embedded air conditioner indoor unit are both arranged at the bottom of the machine body, wherein the air inlet grille is arranged in the middle of the bottom, and the air outlet is arranged in the circumferential direction of the bottom. The process of refrigerating/heating of the indoor unit of the air conditioner comprises the following steps: air in the indoor space enters the machine body from the air inlet grille to be cooled/heated, and the air with the temperature reaching the standard is discharged out of the machine body from the air outlet and enters the indoor space again. However, when the difference between the air in the indoor space and the demand of the user is large, the air sent out from the air outlet easily causes strong cold and hot impact on the human body, and the skin of the human body has obvious discomfort. In addition, when the air conditioner is operated for a long time, air quality may be degraded, such as a decrease in oxygen concentration, an increase in carbon dioxide concentration, and the like.
In order to improve the air supply performance of the air conditioner indoor unit, the air conditioner indoor unit with a multi-air inlet structure is available on the market. As patent (CN 103542452a) discloses a built-in indoor unit of air conditioner, the indoor unit includes: a housing, a lower end of which is open; the heat insulation base is sleeved in the shell, and the lower end of the heat insulation base is open; the heat preservation base plate is used for sealing the lower end of the heat preservation base, and a first air inlet and at least one air outlet are formed in the heat preservation base plate. Preferably, the center of the top wall of the housing is further formed with a second air inlet; and a third air inlet is further formed in the center of the top wall of the heat-insulating base, wherein the second air inlet and the third air inlet are in position correspondence in the vertical direction. However, the multiple air inlets are arranged in the scheme and have the following functions: air can enter the shell through the air inlets at the top and the bottom of the indoor unit respectively, so that the air inlet volume of the indoor unit of the embedded air conditioner is increased, and the refrigerating and heating effects of the whole indoor unit of the embedded air conditioner can be greatly improved. Obviously, the multi-air inlet structure of this case cannot solve the aforementioned problems of cold and hot shock or air quality degradation.
Accordingly, there is a need in the art for a new air intake solution to solve the above problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problems of cold and hot impacts and air quality degradation of the existing air conditioning indoor unit, in one aspect, the present invention provides an air mixing control method for an air conditioning indoor unit, where the air conditioning indoor unit includes a body, and the body includes an air inlet, an air outlet, a first air mixing inlet, and a second air mixing inlet, where the first air mixing inlet is communicated with an indoor space, and the second air mixing inlet is communicated with an outdoor environment, and the air mixing control method includes: acquiring air outlet temperature and air quality parameters of an indoor space; determining the opening and closing state of the first air mixing inlet according to the air outlet temperature, and determining the opening and closing state of the second air mixing inlet according to the air quality parameter; wherein the air quality parameter comprises at least one air parameter.
Through such setting, when first air intake and the indoor space intercommunication of mixing, the phenomenon that the cold and hot impact body that the user that leads to appears owing to the cooling and heating is too fast is alleviated effectively to the mode of mixing the wind through indoor, can make the user obtain required refrigeration heating temperature more comfortablely promptly. When the second air mixing air inlet is communicated with the outdoor environment, the phenomenon of air quality reduction caused by long-term circulation of air in the indoor space before and after heat exchange is avoided in an outdoor air mixing mode. Through the cooperation of mixing the air with mixing theAnd (4) performance. Air quality parameters such as characterizing air quality may include, but are not limited to, the following air parameters: CO of indoor space2、PM2.5、O2、CO、O3Etc. of the components.
In a preferred technical solution of the above air mixing control method, the step of providing a chassis at the top of the machine body, providing the first air mixing inlet on the chassis and configuring a first cover at the first air mixing inlet, providing the second air mixing inlet on the chassis and configuring a second cover at the first air mixing inlet, "determining the open/close state of the first air mixing inlet according to the outlet temperature, and determining the open/close state of the second air mixing inlet according to the air quality parameter" includes: determining the relative position of the first cover body and the first air mixing inlet according to the temperature of the air outlet; and determining the relative position of the second cover body and the second air mixing inlet according to the air parameter of the indoor space.
Taking the first cover as an example, for example, the first cover is pivotally or slidably disposed on the first wind mixing inlet, so that the first wind mixing inlet can be fully opened, partially opened (opened by a set ratio, such as 30%, 50%, 70% of opening degree, etc.), fully closed, or switched between any states according to actual requirements. The second cover is similar to the first cover, and is not described herein again.
On the basis of the results, the mode of mixing air with the indoor space or the outdoor environment can be controlled according to different air supply requirements, the air mixing degree is refined, and the air supply performance of the whole machine is further optimized.
In a preferred embodiment of the above air mixing control method, "determining the relative position between the first cover and the first air mixing inlet according to the temperature of the outlet" includes: and under the condition that the absolute value of the difference value between the air outlet temperature and the target temperature is greater than a first set temperature value, enabling the first cover body to be located at a position where the first air mixing inlet is completely opened.
Under this situation, the hot and cold impact is obvious, so through mixing the natural wind of indoor space and the wind after the heat exchange treatment, the cold and hot impact sense of the user in the target temperature reaching process has been weakened under the situation that guarantees that the target temperature can be realized, has improved user experience. If the operation parameters (such as the rotating speed and the like) of the fan motor of the indoor unit of the air conditioner are ensured to be unchanged, the air flow of the air outlet contains natural air in the indoor space, so that the reaching speed of the target temperature can be reduced, and the rotating speed of the fan motor can be increased under the condition that the cooling and heating efficiency is considered, namely, the cooling and heating efficiency is ensured on the basis of reducing the cold and heat impact. If the target temperature is the temperature which is finally needed to be achieved in the indoor space by the air conditioner indoor unit according to the automatic determination or the user self-selection.
In a preferred embodiment of the above air mixing control method, "determining the relative position between the first cover and the first air mixing inlet according to the temperature of the outlet" includes: and under the condition that the absolute value of the difference value between the air outlet temperature and the target temperature is less than or equal to a second set temperature value, enabling the first cover body to be located at a position where the first air mixing inlet is completely closed.
In this case, the hot-cold impact is not significant and therefore can be disregarded. At the moment, the first air mixing air inlet is completely closed, so that the indoor unit of the air conditioner can obtain the target temperature as soon as possible without interference, and the refrigerating and heating performance of the indoor unit of the air conditioner can be ensured without adjusting the operation parameters of a fan motor. Of course, the rotation speed of the fan motor may be increased in this case to further improve the cooling and heating efficiency.
In a preferred embodiment of the above air mixing control method, "determining the relative position between the first cover and the first air mixing inlet according to the temperature of the outlet" includes: and under the condition that the absolute value of the difference value between the air outlet temperature and the target temperature is greater than a second set temperature value and less than or equal to a first set value, the first cover body is enabled to be partially opened according to a set proportion.
In a preferred technical solution of the above air mixing control method, "partially opening the first air mixing inlet according to a set ratio with the first cover" specifically includes: enabling the first cover body to be continuously located at a position where the first air mixing inlet is partially opened according to a fixed proportion; or the first cover body reciprocates between positions at which the first air mixing air inlet is partially opened according to a first fixed proportion and a second fixed proportion.
Under the condition, the first air mixing air inlet part is opened, so that the effects of reducing the cold and hot impact feeling of a user and improving the refrigerating and heating efficiency can be taken into consideration. As an example, the first cover is pivotally disposed on the chassis, and the first wind mixing inlet is reciprocated between 30% and 70% opening degree by the pivotal movement of the first cover. The reciprocating motion weakens the cold and hot impact feeling through the mode of indoor air mixing, and simultaneously because the natural wind of the indoor space is constantly changed facing the direction of the reciprocating motion, the air mixing device is beneficial to the full mixing of the wind after heat exchange treatment, and the air supply direction of the mixed wind at the air outlet is also adjusted, thereby realizing the fine adjustment of the air supply direction, slightly changing the air supply direction of the same windward point and improving the comfort of users to a certain extent.
In a preferred embodiment of the above air mixing control method, "determining the relative position between the second cover and the second air mixing inlet according to the air parameter of the indoor space" includes: and under the condition that the absolute value of the difference value between any one air parameter and the parameter threshold value of the air parameter is greater than a first set value, enabling the second cover body to be at a position where the first air mixing air inlet is completely opened.
Under the condition, the air quality is obviously reduced, so that the air of the outdoor environment is introduced into the machine body and is mixed with the air subjected to heat exchange treatment, the target temperature is improved under the condition of ensuring that the target temperature can be realized, the air quality of the rear indoor space is achieved, and the air supply performance of the whole machine is improved. If the operation parameters (such as the rotating speed and the like) of the fan motor of the indoor unit of the air conditioner are ensured to be unchanged, the air flow of the air outlet contains the air of the outdoor environment, so the achievement speed of the target temperature can be reduced, and the rotating speed of the fan motor can be increased under the condition that the cooling and heating efficiency is considered, namely, the cooling and heating efficiency is ensured on the basis of improving the air quality.
It should be noted that the air of the outdoor environment is not necessarily the natural wind of the outdoor environment, and in the case that the air quality of the outdoor environment is poor, the air of the outdoor environment may be: an air purification module is additionally arranged in the indoor unit of the air conditioner, the whole quality of the natural air of the outdoor environment is improved through the air purification module, and the second air mixing air inlet is communicated with the improved air.
In a preferred embodiment of the above air mixing control method, "determining the relative position between the second cover and the second air mixing inlet according to the air parameter of the indoor space" includes: and under the condition that the absolute value of the difference value between each air parameter and the parameter threshold value of the air parameter is smaller than a second set value corresponding to the air parameter, enabling the second cover body to be at a position for closing the first air mixing inlet.
In this case, the air quality of the indoor environment is good and thus the factor of the quality degradation due to the air quality is negligible. At the moment, the second air mixing air inlet is completely closed, so that the indoor unit of the air conditioner can obtain the target temperature as soon as possible without interference, and the refrigerating and heating performance of the indoor unit of the air conditioner can be ensured without adjusting the operation parameters of a fan motor. Of course, the rotation speed of the fan motor may be increased in this case to further improve the cooling and heating efficiency.
In a preferred technical solution of the above-mentioned air mixing control method, the air mixing control method further includes: under the condition that the running time of the indoor unit of the air conditioner is longer than the set time, the second cover body is directly switched to a state that the second air mixing air inlet works in an air exchange mode; the second cover body is continuously positioned at a position where the second air mixing inlet is partially opened according to a fixed air exchange proportion in the air exchange mode; or the second cover body reciprocates between the positions of the second air mixing air inlet partially opened according to the first fixed air exchange proportion and the second fixed air exchange proportion.
In this case, the air quality of the indoor space is improved by the air introduction of the outdoor environment. That is, such setting pertains to the manifestation of overall performance, namely, improving the air quality of the indoor space by introducing air from the outdoor environment, whether or not the air quality drops to a node that must be changed.
If the switching mode can be switched to the logic of determining the opening and closing states of the second air mixing inlet according to the air parameters after the set operation time, the air quality can be improved more truly, and if the air quality does not reach the standard after the set operation time, the air quality can be improved by continuously opening the second air mixing inlet, so that the air supply performance of the whole air conditioner is ensured. Also, in consideration of the efficiency of cooling and heating, the rotation speed of the fan motor may be increased in such a case, that is, the efficiency of cooling and heating may be increased on the basis of securing the air quality.
The invention further provides an air-conditioning indoor unit, which comprises a controller, wherein the controller is used for executing the air mixing control method of the air-conditioning indoor unit in any scheme. It should be noted that, the air-conditioning indoor unit has all the technical effects of the air mixing control method, and details are not described herein.
Drawings
The air-conditioning indoor unit and the air mixing control method thereof according to the present invention will be described with reference to the accompanying drawings in conjunction with a round-type in-air conditioning indoor unit. In the drawings:
fig. 1 is a schematic structural view of an indoor unit of an air conditioner according to an embodiment of the present invention;
fig. 2 is an exploded view of a base plate of an indoor unit of an air conditioner according to an embodiment of the present invention;
FIG. 3A shows an enlarged view of detail A of FIG. 2, showing a schematic view of the first cover plate assembly;
FIG. 3B shows an enlarged view of detail B of FIG. 2, illustrating a structural view of a second cover plate assembly;
fig. 4 is a schematic flow chart illustrating an air mixing control method of an indoor unit of an air conditioner according to an embodiment of the present invention;
fig. 5A is a schematic view showing the state of the indoor unit of the air conditioner in the basic air supply stage;
fig. 5B is a schematic view illustrating a state of an air mixing control method of an indoor unit of an air conditioner according to an embodiment of the present invention when indoor air is mixed;
fig. 5C is a schematic view illustrating a state of an outdoor air mixing control method of an indoor unit of an air conditioner according to an embodiment of the present invention; and
fig. 5D is a schematic view illustrating a state of the air mixing control method of the indoor unit of the air conditioner according to the embodiment of the present invention when the indoor/outdoor air is mixed comprehensively.
List of reference numerals
1. A body; 11. a chassis; 111. a first air mixing inlet; 112. a second air mixing inlet; 12. an air inlet grille; 121. an access panel; 13. a panel frame; 131. an air outlet; 21. a first cover plate assembly; 211. a first cover plate; 212. a rack; 213. a gear; 214. a first drive motor; 22. a second cover plate assembly; 221. a second cover plate; 222. a shaft hole; 223. a second drive motor.
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 drawings include one first wind mixing inlet and two second wind mixing inlets, and both the two wind mixing inlets are disposed on the chassis, the arrangement manner is not the same, and those skilled in the art may adjust the wind mixing inlets according to needs, for example, the sizes, numbers, and arrangement positions of the two wind mixing inlets may be the same or different.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, 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," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, methods, procedures, components, and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present invention.
Referring to fig. 1, fig. 1 is a schematic structural view of an indoor unit of an air conditioner according to an embodiment of the present invention. As shown in fig. 1, the indoor unit of an air conditioner mainly includes a body 1 for implementing a cooling/heating function, a chassis 11 is disposed on a top of the body 1, and the indoor unit of an air conditioner is suspended at a waiting installation position on a roof through the chassis 11. The chassis is provided with two first air mixing inlets 111 mainly used for realizing an indoor air mixing function and a second air mixing inlet 112 mainly used for realizing an outdoor air mixing function. An air inlet grille 12 (an air inlet) mainly used for realizing the basic air inlet function of the air conditioner is circumferentially arranged on the side surface of the machine body 1, and an access panel 121 with an arc-shaped structure is arranged on the air inlet grille 12. In the case where the indoor unit of the air conditioner is in a normal cooling/heating operation state, the access panel 121 is fixed to the air-intake grille 12. Under the action of external force, the access panel 121 can slide on the rail provided on the air intake grille 12 in the vertical direction. When parts such as an electrical box, a pipe group, etc. in the machine body 1 need to be inspected, the parts can be seen by sliding the inspection plate 121 downward along the rail. The bottom of organism 1 is provided with panel frame 13, and panel frame 13 passes through fastening screw with the organism bottom and fixes. As a preferred embodiment, the panel frame 13 is pivotally connected to the bottom of the machine body 1 by a hinge, and when parts such as a fan motor, a heat exchanger, etc. in the machine body 1 need to be serviced, the panel frame 13 rotates to a vertical position around the hinge under the action of its own weight after the fastening screws are removed, i.e., the panel frame does not need to be detached from the machine body 1 during the servicing work. The panel frame 13 is provided with an air outlet 131.
Through the arrangement of the first air mixing inlet 111, the cold and hot shock caused by the excessive temperature difference between the air flow sent out from the air outlet 131 and the air in the indoor space and the discomfort caused by the cold and hot shock can be relieved. Especially, when the temperature difference between the air in the indoor space and the air discharged from the air outlet is greater than 10 ℃ during the heating cycle of the indoor unit of the air conditioner, the indoor unit of the air conditioner can cause obvious thermal shock to users.
In order to ensure the cooling/heating effect of the indoor unit of the air conditioner, the indoor unit of the air conditioner is theoretically not allowed to be windowed and exchanged with the outside during the operation. Thus, after the air-conditioning indoor unit is operated for a long time, CO in the air of the indoor space2Increased concentration, O2The concentration is reduced, and the concentration of particulate matters (such as PM2.5 concentration) is increased, namely the quality of the air in the indoor space is obviously reduced after the indoor unit of the air conditioner operates for a long time, which influences the respiratory health of a user in the indoor space to a certain extent. In view of this, by the arrangement of the second air mixing inlet 112, the influence of the air quality reduction caused by the long-time operation of the indoor unit of the air conditioner on the health of the user can be reduced.
Preferably, the first wind mixing inlet 111 is located above the air flow path between the air intake grille 12 and the air outlet 131, i.e., in a low pressure area. Thus, the air introduced from the first air mixing inlet 111 and coming from the indoor space is introduced into the air mixing area of the indoor unit of the air conditioner by the pressure difference between the indoor space and the low pressure area, and the air introduced from the first air mixing inlet 111 and the air treated by the heat exchanger are mixed in the air mixing area and then sent into the indoor space through the outlet 13. By such a process, the temperature difference between the temperature of the air discharged from the outlet 13 and the temperature of the indoor space is relatively reduced, thereby improving the comfort of the human body. Especially, during the heating cycle of the indoor unit of the air conditioner, the thermal shock of hot air to the skin of a user can be obviously reduced, so that the comfort experience of the user is improved.
Preferably, air in the outdoor environment enters the air mixing area of the indoor unit of the air conditioner through the second air mixing inlet 112 from the outdoor pipeline, the air is sent to the air mixing area of the indoor unit of the air conditioner under the driving of the fan, the air introduced from the second air mixing inlet 112 is mixed with the air processed by the heat exchanger in the air mixing area, and then the air is sent to the indoor space through the air outlet 131, and the problem of air quality reduction of the indoor space caused by long-time non-ventilation is effectively solved by introducing the air with good air quality, so that the air quality of the indoor space is improved.
It should be noted that the first air mixing inlet 111 is mainly responsible for air mixing with air in the indoor space, for example, during heating operation, the temperature of the outlet is appropriately raised to reduce thermal shock to the user. During the cooling operation, the temperature of the air outlet is properly reduced, so that the cold impact on a user is reduced. Therefore, the opening timing of the first air mixing inlet 111 is usually at the initial operation stage of the air conditioner indoor unit, that is, an amount of time for gradually adapting to the temperature difference is reserved for the user. The second air mixing inlet 112 is mainly responsible for mixing air with fresh air in the outdoor environment, so the second air mixing inlet 112 is usually opened only when the indoor unit of the air conditioner is operated for a long time.
It can be seen that, since the first wind mixing inlet 111 has a larger air intake amount than the second wind mixing inlet 112 from both the use frequency and the requirement, the number of the first wind mixing inlet 111 is usually larger than that of the second wind mixing inlet 112. Of course, the number of the (first and second) air mixing inlets can be flexibly adjusted according to specific conditions. If only one first air mixing inlet 111 with larger air inlet amount can be arranged; or three or more first wind mixing inlets 111 are arranged, and the plurality of first wind mixing inlets 111 can be uniformly distributed or non-uniformly distributed on the chassis 11; or the first wind mixing inlet 111 is optimized to be a grid-like structure similar to the air inlet grille from the opening structure in the figure, and the like.
It should be noted that, in order to ensure that the indoor air mixing is as sufficient as possible, the first air mixing inlet 111 and the air inlet direction of the air inlet grille 12 should have an included angle, i.e., be non-parallel). Similarly, in order to ensure that the outdoor air mixing is as sufficient as possible, the second air mixing inlet 112 and the air inlet direction of the air inlet grille 12 should have an included angle. Preferably, the air inlet direction of the (first and second) air mixing inlets and the air inlet direction of the air inlet grille are both approximately vertical. In order to ensure that the indoor/outdoor comprehensive air mixing is as sufficient as possible, an included angle is formed between the air inlet directions of the first air mixing air inlet 111 and the second air mixing air inlet 112. However, even in the case where the air intake directions of the first and second air-mixing air intakes 111 and 112 are parallel, the comprehensive air mixing can be achieved.
It will be understood by those skilled in the art that the above-mentioned (first and second) wind mixing inlets are both disposed on the chassis, and the solution in which the (first and second) wind mixing inlets are substantially perpendicular to the wind inlet direction of the wind inlet grille 12 is only a preferred embodiment. In fact, the (first and second) air mixing inlets may be disposed at other positions as long as the functions of indoor air mixing and outdoor air mixing can be achieved by the (first and second) air mixing inlets, for example, the first air mixing inlet is a part of the air inlet grille, but the part can directly introduce the air in the indoor space into the air mixing area capable of mixing with the air processed by the heat exchanger.
Referring to fig. 2, fig. 2 is an exploded view of a chassis of an indoor unit of an air conditioner according to an embodiment of the present invention. As shown in fig. 2, the first wind mixing inlet 111 is provided with a first cover assembly 21 capable of opening/closing the first wind mixing inlet 111, and the second wind mixing inlet 112 is provided with a second cover assembly 22 capable of opening/closing the second wind mixing inlet 112.
Referring to fig. 3A, fig. 3A is an enlarged view of a portion a of fig. 2, showing a structural view of the first cover plate assembly. As shown in fig. 3A, the first cover plate assembly 21 includes a first cover plate 211 disposed on the first air mixing inlet 111 and capable of completely covering the first air mixing inlet 111, a rack 212 disposed on the first cover plate 211, a gear 213 engaged with the rack 212, and a first driving motor 214 connected to the gear, wherein the first driving motor 214 causes the first cover plate 211 to open/close the first air mixing inlet 111 by translating in a horizontal plane through a gear/rack pair serving as a transmission mechanism. Referring further to fig. 2, the rack 212 is disposed at an outer edge of the first cover 211, the gear 213 is connected to an output shaft of the first driving motor 214, and the first cover 211 opens/closes the first wind mixing inlet 111 in a translational manner by engagement of the rack 212 and the gear 213. Obviously, the rack 212 may be disposed on the plate surface of the first cover plate 211.
Referring to fig. 3B, fig. 3B illustrates an enlarged view of a portion B of fig. 2, showing a structural schematic view of the second cover plate assembly. As shown in fig. 3B, the second cover plate assembly 22 includes a second cover plate 221 disposed at the second wind inlet 112 and capable of completely covering the second wind inlet 112, a shaft hole 222 disposed on the second cover plate 221, and a second driving motor 223 connected to the shaft hole 222. Referring to the orientation of fig. 2, support plates are respectively disposed at the upper and lower ends of the second cover plate 221, each support plate is provided with an elongated shaft hole 222, and the second cover plate 221 can open/close the second air mixing inlet 112 in a rotating manner by the cooperation between the output shaft of the second driving motor 223 and the shaft hole 222. Obviously, the shaft hole 222 may be a rectangular hole, a triangular hole, or other non-circular hole capable of transmitting force. In addition, the output shaft of the second driving motor 223 may be directly connected to the shaft hole 222, or the output shaft of the second driving motor 223 may be connected to a transmission shaft through a coupling, and the transmission shaft is inserted into the shaft hole 222 to be directly connected.
It should be noted that although the first driving motor 214 translates the first cover plate 211 through the gear/rack transmission pair and the second driving motor 223 rotates the second cover plate 221 through direct driving, this is only exemplary, and it is obvious that the structures of the first cover plate assembly 21 and the second cover plate assembly 22 may be exchanged, or the two first air mixing inlets 111 may adopt two different structures.
Referring to fig. 4, fig. 4 is a schematic flow chart illustrating an air mixing control method of an air conditioning indoor unit according to an embodiment of the present invention. As shown in fig. 4, the air mixing control method of the present invention mainly includes the following steps:
s10, acquiring air outlet temperature and air quality parameters of the indoor space; wherein the air quality parameter comprises at least one air parameter;
and S20, determining the opening and closing state of the first air mixing inlet according to the air outlet temperature, and determining the opening and closing state of the second air mixing inlet according to the air quality parameter.
It should be noted that the open and close states of the second wind mixing inlet and the second wind mixing inlet may include a fully open state, a fully closed state, and a partially open state, wherein the partially open state may be a state of being continuously opened at a set position, or a state of being ensured to be partially opened in a reciprocating manner between certain two positions, and the like. In addition, the opening and closing of the first air mixing inlet and the second air mixing inlet can be adjusted simultaneously or sequentially.
The invention can adjust the air supply quality of the indoor unit of the air conditioner by only the air inlet grille or combining the air inlet of the (first and second) air mixing air inlet. The following describes a specific principle and process of improving the air supply quality of the air conditioning indoor unit by the air mixing control method of the air conditioning indoor unit according to the present invention with reference to fig. 5A, 5B, 5C, and 5D.
Referring to fig. 5A, fig. 5A is a schematic view illustrating a state of a basic air supply in the air mixing control method of the air conditioning indoor unit according to the embodiment of the present invention. As shown in fig. 5A, the air in the indoor space is sent into the interior of the machine body through the air inlet grille 12, and the air with the temperature up to the standard after being processed by the heat exchanger is sent into the indoor space again through the air outlet. In this state, both the (first and second) air mixing inlets are in a completely closed state.
Referring to fig. 5B, fig. 5B is a schematic view illustrating a state of an air mixing control method of an air conditioning indoor unit according to an embodiment of the present invention when indoor air is mixed. As shown in fig. 5B, a part of air in the indoor space is sent into the interior of the air conditioner body through the air inlet grille 12, the temperature of the air after being processed by the heat exchanger reaches the standard, a part of air in the indoor space enters the air mixing area in the indoor unit of the air conditioner through the first air mixing air inlet, and the two parts of air are fully mixed in the air mixing area and then are sent into the indoor space again through the air outlet 131. In this state, the first air mixing inlet is opened, and the second air mixing inlet is closed. The first air mixing inlet can be partially opened or fully opened according to actual conditions.
Referring to fig. 5C, fig. 5C is a schematic view illustrating a state of an air mixing control method of an air conditioning indoor unit according to an embodiment of the present invention when outdoor air is mixed. As shown in fig. 5C, the air in the indoor space is sent into the interior of the machine body through the air inlet grille 12, and the temperature after being processed by the heat exchanger reaches the standard. A part of air from the outdoor environment is introduced into an air mixing area inside the indoor unit of the air conditioner through an outdoor pipeline, and the two parts of air are fully mixed in the air mixing area and then are sent into an indoor space through an air outlet. In this state, the first air mixing inlet is closed, and the second air mixing inlet is opened. The second air mixing inlet can be partially opened or fully opened according to actual conditions.
Referring to fig. 5D, fig. 5D is a schematic view illustrating a state of the air mixing control method of the indoor unit of an air conditioner according to an embodiment of the present invention when indoor/outdoor air mixing is performed comprehensively. As shown in fig. 5D, a part of air in the indoor space is sent to the air mixing area inside the indoor unit of the air conditioner through the air inlet grille 12, and the temperature after being treated by the heat exchanger reaches the standard; a part of air in the indoor space enters a wind mixing area inside the indoor unit of the air conditioner through the first wind mixing air inlet 111; a part of air in the outdoor environment is introduced into a mixed air area inside the indoor unit of the air conditioner through the outdoor pipeline. The three parts of air are fully mixed in the mixing area and then are delivered into the indoor space again through the air outlet. In this state, the first air mixing inlet and the second air mixing inlet are both opened. The first air mixing inlet and/or the second air mixing inlet can be partially opened or completely opened according to actual situations.
That is, on the basis of air inlet of the air inlet grille, the indoor unit of the air conditioner is in an indoor air mixing state capable of reducing cold and hot impact of a user by only opening the first air mixing air inlet, the indoor unit of the air conditioner is in an outdoor air mixing state capable of improving air quality by only opening the second air mixing air inlet, and the indoor unit of the air conditioner is in a comprehensive air mixing state capable of integrally optimizing air outlet quality by simultaneously opening the (first and second) air mixing air inlets.
As an exemplary description, assume a target temperature T0At 26 ℃, under the condition that the indoor unit of the air conditioner is in a heating state, the sensor monitors the temperature T of the air outlet in real time, and when the difference value between the target temperature and the temperature of the air outlet, namely delta T is T0When the temperature is-T is more than 10 ℃, the first air mixing inlet is completely opened. When delta t is more than 0.5 ℃ and less than or equal to 10 ℃, the first air mixing inlet moves back and forth at a constant speed between 30% and 70% of opening. And when delta t is less than or equal to 0.5 ℃, the first air mixing inlet is closed. Assuming that the target temperature air quality parameter includes only CO2Concentration of when CO2When the concentration is more than 1000PPM, the air inlet of the second air mixing port is completely opened, and CO is in2When the concentration is less than or equal to 350PPM, the second air mixing inlet is completely closed. When the air conditioner is operated for more than 3 hours, no matter whether CO is in the air conditioner2The second air mixing inlet is kept at 70% opening degree and runs for 3 min. Meanwhile, under the condition that the first air mixing air inlet and/or the first air mixing air inlet are/is completely opened, the rotating speed of the air supply motor is properly increased.
Therefore, in the air-conditioning indoor unit, on the basis of the air inlet grille, the arrangement of the first air mixing air inlet can reduce the thermal shock or cold shock of the air-conditioning indoor unit to a user due to the temperature difference in the initial operation stage. Through the arrangement of the second air mixing air inlet, the air quality of the indoor space of the air conditioner indoor unit after long-time operation can be optimized. Through the cooperation of the (first and second) air mixing inlets, the overall air supply quality of the air outlet can be optimized. The controller adjusts the opening and closing states of the (first and second) air mixing air inlets according to the air outlet temperature, the air parameters and the running time of the indoor unit of the air conditioner, so that the air flow obtained by the indoor space can meet the requirements of both comfort and health of a user, and the air supply quality of the whole air conditioner is optimized.
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 (8)
1. A mixed air control method of an air-conditioning indoor unit comprises a body, the body comprises an air inlet and an air outlet, and is characterized in that the air-conditioning indoor unit also comprises a second mixed air inlet and two first mixed air inlets, the first mixed air inlet is provided with a first cover body, the second mixed air inlet is provided with a second cover body,
wherein, the top of organism is provided with the chassis, first mix the wind air intake with the second mixes the wind air intake set up in the chassis, the air intake set up in the side circumference of organism, so that:
in a first aspect, the first air mixing intake is located in a low pressure region above an air flow path between the intake and the outtake, such that: the air from the indoor space introduced from the first air mixing air inlet enters the air mixing area of the indoor unit of the air conditioner by virtue of the pressure difference between the indoor space and the low-pressure area, and then: air introduced from the first air mixing air inlet and air treated by the heat exchanger are mixed in the air mixing area and then are sent into the indoor space through the air outlet;
in a second aspect, air of the outdoor environment enters the air mixing area of the indoor unit of the air conditioner through the second air mixing air inlet, so that: the air of outdoor environment sends the air into the mixed wind region of air conditioning indoor set under the drive of fan, and then: air introduced from the second air mixing air inlet and air treated by the heat exchanger are mixed in the air mixing area and then are sent into the indoor space through the air outlet;
the first air mixing inlet is communicated with an indoor space, the second air mixing inlet is communicated with an outdoor environment, and the air mixing control method comprises the following steps:
acquiring air outlet temperature and air quality parameters of an indoor space;
determining the open-close state of the first air mixing inlet according to the air outlet temperature, and determining the open-close state of the second air mixing inlet according to the air quality parameter, specifically comprising:
determining the relative position of the first cover body and the first air mixing inlet according to the temperature of the air outlet; and
determining the relative position of the second cover body and the second air mixing inlet according to the air parameter of the indoor space;
wherein the air quality parameter comprises at least one air parameter;
the air mixing control method further comprises the following steps:
under the condition that the running time of the indoor unit of the air conditioner is longer than the set time, the second cover body is directly switched to a state that the second air mixing air inlet works in an air exchange mode;
the second cover body is continuously positioned at a position where the second air mixing inlet is partially opened according to a fixed air exchange proportion in the air exchange mode; or
And enabling the second cover body to reciprocate between positions at which the second air mixing air inlet is partially opened according to the first fixed air exchange proportion and the second fixed air exchange proportion.
2. The air mixing control method according to claim 1, wherein the step of determining the relative position of the first cover and the first air mixing inlet according to the outlet temperature comprises:
and under the condition that the absolute value of the difference value between the air outlet temperature and the target temperature is greater than a first set temperature value, enabling the first cover body to be located at a position where the first air mixing inlet is completely opened.
3. The air mixing control method according to claim 1, wherein the step of determining the relative position of the first cover and the first air mixing inlet according to the outlet temperature comprises:
and under the condition that the absolute value of the difference value between the air outlet temperature and the target temperature is less than or equal to a second set temperature value, enabling the first cover body to be located at a position where the first air mixing inlet is completely closed.
4. The air mixing control method according to claim 1, wherein the step of determining the relative position of the first cover and the first air mixing inlet according to the outlet temperature comprises:
and under the condition that the absolute value of the difference value between the air outlet temperature and the target temperature is greater than a second set temperature value and less than or equal to a first set value, the first cover body is enabled to be partially opened according to a set proportion.
5. The air mixing control method according to claim 4, wherein the step of partially opening the first air mixing inlet according to the set proportion by the first cover body is specifically:
enabling the first cover body to be continuously located at a position where the first air mixing inlet is partially opened according to a fixed proportion; or
And enabling the first cover body to reciprocate between positions at which the first air mixing air inlet is partially opened according to a first fixed proportion and a second fixed proportion.
6. The air mixing control method according to claim 1, wherein the step of determining the relative position of the second cover and the second air mixing inlet according to the air parameter of the indoor space comprises:
and under the condition that the absolute value of the difference value between any one air parameter and the parameter threshold value of the air parameter is greater than a first set value, enabling the second cover body to be at a position where the first air mixing air inlet is completely opened.
7. The air mixing control method according to claim 1, wherein the step of determining the relative position of the second cover and the second air mixing inlet according to the air parameter of the indoor space comprises:
and under the condition that the absolute value of the difference value between each air parameter and the parameter threshold value of the air parameter is smaller than a second set value corresponding to the air parameter, enabling the second cover body to be at a position for closing the first air mixing inlet.
8. An indoor unit of an air conditioner, comprising a controller for performing the air mixing control method of the indoor unit of an air conditioner according to any one of claims 1 to 7.
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