CN111219790B - Ceiling machine air exhaust control method and ceiling machine - Google Patents

Ceiling machine air exhaust control method and ceiling machine Download PDF

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Publication number
CN111219790B
CN111219790B CN201811429384.3A CN201811429384A CN111219790B CN 111219790 B CN111219790 B CN 111219790B CN 201811429384 A CN201811429384 A CN 201811429384A CN 111219790 B CN111219790 B CN 111219790B
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air
wind wheel
rotating speed
determining
boundary
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CN111219790A (en
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孙卫强
吴成意
陈帅
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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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
    • 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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/81—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the air supply to heat-exchangers or bypass channels
    • 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
    • F24F13/20—Casings or covers
    • 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
    • F24F13/28—Arrangement or mounting of filters
    • 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
    • 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

Abstract

The invention discloses a ceiling machine exhaust control method, which comprises the following steps: determining an air outlet mode according to user selection; determining the initial rotating speed of a main wind wheel; judging whether the duration time that the indoor temperature is higher than the indoor target temperature exceeds a time period T2; determining the boundary rotating speed r of the auxiliary wind wheel according to the preset height h between the ceiling and the ground and the preset temperature control area S of the air conditionerfAnd boundary rotating speed r of main wind wheelz(ii) a Equally dividing the angle between the minimum opening angle alpha and the vertical normal into N bisection angles beta; respectively making the air outlet direction and the normal line form included angles of 0, beta, 2 beta, … … and Nbeta, and circularly controlling the air outlet direction of the air conditioner according to the sequence; and judging whether the indoor temperature is reduced below the set temperature, and if so, executing a normal air outlet mode. The invention has the beneficial effects that: the ceiling machine can cool the indoor space more quickly and uniformly.

Description

Ceiling machine air exhaust control method and ceiling machine
Technical Field
The invention relates to the technical field of air conditioners, in particular to a ceiling machine air exhaust control method and a ceiling machine.
Background
Generally, an air conditioner is an apparatus for cooling, heating or purifying sucked air and discharging the air using transfer of heat generated in a process of evaporating and condensing a refrigerant to condition air of an indoor space.
The air conditioner performs a cooling operation of discharging heat in a room to the outside in summer and performs a heating operation of a heat pump that circulates a refrigerant in a reverse manner to that of the cooling cycle to supply heat to the room in winter.
When a cooling operation or a heating operation is performed, the air conditioner rotates a fan disposed near an indoor heat exchanger to suck indoor air, exchanges heat with the sucked air in the indoor heat exchanger, and discharges the heat-exchanged air to an indoor space in a state where fan blades disposed at a discharge portion are operated to adjust a direction of a discharged air flow, thereby conditioning the air of the indoor space.
Disclosure of Invention
The invention aims to provide a ceiling machine exhaust control method and a ceiling machine, so that the ceiling machine can cool the indoor more quickly and uniformly.
Specifically, the invention is realized by the following technical scheme:
a ceiling fan exhaust control method, the method comprising:
s1: determining an air outlet mode according to user selection;
s2: determining the initial rotating speed of the main wind wheel according to the temperature difference between the current evaporator coil temperature and the indoor temperature;
s3: judging whether the duration time that the indoor temperature is higher than the indoor target temperature exceeds a time period T2, if so, executing S4, and if not, continuing executing S3;
s4: determining the boundary rotating speed r of the auxiliary wind wheel according to the preset height h between the ceiling and the ground and the preset temperature control area S of the air conditionerfAnd boundary rotating speed r of main wind wheelz；
S5: equally dividing the angle between the minimum opening angle alpha and the vertical normal into N bisection angles beta;
s6: respectively making the air outlet direction and the normal line form included angles of 0, beta, 2 beta, … … and Nbeta, and circularly controlling the air outlet direction of the air conditioner according to the sequence;
s7: and judging whether the indoor temperature is reduced to be lower than the set temperature, if so, executing a normal air outlet mode, returning to S3, and if not, executing S6.
Preferably, the S1 includes:
s11: starting, receiving an air outlet mode option of a user;
s12: and determining to select a normal air-out mode or a rapid cooling mode according to user selection to control air-out, executing S2 when the normal air-out mode is selected, and executing S4 when the rapid cooling mode is selected.
Preferably, the S2 includes:
s21: judging whether the indoor temperature exceeds a preset high-temperature threshold for the first time, if so, executing S22;
s22: and determining the initial rotating speed of the main wind wheel according to the temperature difference between the current evaporator coil temperature and the indoor temperature, and starting the main wind wheel at the determined initial rotating speed.
Preferably, the S4 includes:
s41: determining the minimum opening angle alpha of the air direction of the air conditioner according to the preset height h between the ceiling and the ground and the preset temperature control area S of the air conditioner;
s42: determining the boundary wind speed V of the auxiliary wind wheel according to the minimum opening angle alpha and the height h of the ceiling from the ground;
s43: determining the boundary rotating speed r of the auxiliary wind wheel according to the boundary wind speed V and the minimum opening angle alphafAnd boundary rotating speed r of main wind wheelz。
Preferably, the S41 includes:
by the formula
Figure BDA0001882355660000021
The minimum opening angle alpha of the air conditioner wind direction is determined.
Preferably, the S42 includes:
according to the formula
Figure BDA0001882355660000031
And determining a boundary wind speed V, wherein T is a preset boundary wind overtime.
Preferably, the S43 includes: determining the boundary rotating speed r of the main wind wheel in a table look-up mode according to the boundary wind speed V and the minimum field angle alphazAnd auxiliary rotor boundary speed rf。
Preferably, the S6 includes:
s61: stopping the rotation of the auxiliary wind wheel, resetting the counter, setting the first stop time as a preset time t, and rotating the main wind wheel according to the rotating speed in the normal wind outlet mode;
s62: continuing for a first stop time;
s63: judging whether the current count value M of the counter is N, if so, returning to S61, and if not, executing S64;
s64: the counter is added by 1 to obtain an updated count M;
s65: judging whether M is N, if so, determining the rotating speed r of the main wind wheel according to the boundary wind speed V and the minimum field angle alphaz1And auxiliary rotor speed rf1Setting the preset boundary wind-over time as a first stop time, and then executing S62, if not, executing S66;
s66: according to the formula
Figure BDA0001882355660000032
Calculating the current air outlet speed V ', wherein T' is T;
s67: determining the rotating speed of the main wind wheel and the rotating speed of the auxiliary wind wheel in a table look-up mode according to the calculated current wind outlet speed V' and the wind speed deflection angle value of 90-Mbeta;
s68: determining T' as a new first stop time;
s69: determining the newly obtained main wind wheel rotating speed and the auxiliary wind wheel rotating speed as a new main wind wheel rotating speed rz1And auxiliary rotor speed rf1And then returns to S62.
Preferably, the S66 includes:
according to the formula
Figure BDA0001882355660000041
And calculating T', wherein Q is a preset correction parameter.
A ceiling fan using the exhaust control method of any preceding claim.
The invention has the beneficial effects that: the ceiling machine can cool the indoor space more quickly and uniformly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of a ceiling machine provided by the invention;
FIG. 2 is a schematic cross-sectional view of a ceiling machine according to the present invention;
FIG. 3 is a schematic view of a first structure of a ceiling fan airflow control unit provided by the invention;
fig. 4 is a schematic diagram of a second structure of a ceiling fan airflow control unit provided by the invention;
FIG. 5 is a schematic view of a ceiling machine according to the present invention showing a minimum opening angle α;
fig. 6 is a schematic flow chart of a ceiling fan exhaust control method provided by the invention;
FIG. 7 is a schematic view of a detailed flow chart of S1 in FIG. 6;
FIG. 8 is a schematic view of a detailed flow chart of S2 in FIG. 6;
FIG. 9 is a schematic view of a detailed flow chart of S4 in FIG. 6;
fig. 10 is a schematic diagram of a specific flow of S6 in fig. 6.
Description of the reference numerals
To further clarify the structure and connection between the various components of the present invention, the following reference numerals are given and described.
An inner unit casing 1; an outer shell 11; an outer shell expansion rim body 12; an outer shell expansion side wall 13; a filter screen 14; an air inlet 15; a main blower 21; a primary wind wheel 22; an evaporator 23; an air outlet 3; an air suction groove 3 a; an auxiliary air outlet 3 b; an air guide curved surface 31; an auxiliary wind wheel 32; an air flow path 34; the first flow path 341; a second flow channel 342; a third flow passage 343; a fourth flow channel 344; a housing case 35; a support plate 4.
The technical scheme of the invention can be more clearly understood and explained by combining the embodiment of the invention through the reference sign description.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present invention. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
The present invention will be described in detail below by way of examples.
As shown in fig. 1, the indoor ceiling fan includes an inner unit casing 1 having a suction opening 15 and a discharge opening 3.
The inner unit case 1 has an approximately circular shape. Further, the inner unit case 1 includes an outer case 11 provided in a ceiling, an outer case expansion side body 12 coupled to a lower portion of the outer case 11, and an outer case expansion side wall 13 coupled to a lower portion of the outer case expansion side body 12.
An air suction opening 15 including a plurality of suction holes may be provided at a central portion of the outer case expansion side wall 13 to suck air. A filter screen 14 for filtering dust from the air sucked into the air suction opening 15 may be provided on the air suction opening 15. The air discharge port 3 including a plurality of discharge holes through which air is discharged may be disposed at an outer portion of the air suction port 15. The air discharge outlet 3 may have an approximately circular shape when viewed in a vertical direction toward the surface of the ceiling.
As shown in fig. 2, a filter screen 14 for filtering out dust in the air sucked into the air suction opening 15 may be provided on the bottom surface of the outer case expansion side wall 13.
In addition, the outer case-expanding side wall 13 may have a wind guide curved surface 31 to guide the air discharged through the air outlet 3. The air discharged through the air discharge opening 3 flows along the surface of the air guiding curved surface 31, and due to this, the air flow direction is determined by the form of the surface of the air guiding curved surface 31. In other words, when the gradient of the air guide curved surface 31 is gentle, the angle of the discharged airflow is gentle. Conversely, when the gradient of the air guiding curved surface 31 is steep, the angle of the discharged airflow also becomes large.
The indoor ceiling fan in the above structure sucks air of a space-conditioned space from a lower portion, heat-exchanges the air, and discharges the air to the lower portion again. Here, the indoor ceiling machine may suck air with dust filtered by the filter screen 14. In addition, the indoor ceiling fan can guide the air discharged through the air discharge opening 3 to flow while being in close contact with the air guide curved surface 31.
The indoor ceiling machine includes an evaporator 23 provided in the inner casing 1, a main wind wheel 22 and an auxiliary wind wheel 32 for making air flow, and an intake air flow duct 34.
The evaporator 23 may be placed on the support plate 4 provided in the inner unit case 1. The support plate 4 stores the condensate generated in the evaporator 23. The evaporator 23 may have an approximately circular shape when viewed in a vertical direction toward the surface of the ceiling.
The primary wind wheel 22 may be disposed in a radially inner portion of the evaporator 23. The main wind wheel 22 may be a centrifugal fan that sucks in air in a rotational axial direction to discharge the air in a radial direction. The indoor ceiling fan may include a main fan 21 to transmit a driving force to a main wind wheel 22.
The indoor ceiling machine also comprises an airflow control unit for controlling the direction of airflow, the airflow control unit comprising an auxiliary wind wheel 32 and an air duct 34 for the suction airflow. At least one of the air flow control units may be provided in the housing, or a plurality of the air flow control units therein may be provided at predetermined intervals. This embodiment is a case where three airflow control units are provided at intervals of 120 °.
The air flow control unit may suck air around the air discharge outlet 3. When air around the air discharge outlet 3 is sucked, the air flow control unit may suck air from a direction deviated from the direction of the discharged air flow. The airflow control unit may comprise at least one secondary wind rotor 32, an intake airflow duct 34 and a secondary fan 33 to provide a driving force to the at least one secondary wind rotor 32.
As shown in fig. 3, the auxiliary wind wheel 32 generates a suction force for sucking air around the air discharge outlet 3. Further, ambient air is sucked by the suction force, and the pressure of the air changes.
The suction air flow duct 34 forms a flow passage through which the sucked air flows. That is, the intake air flow duct 34 guides the flow of the sucked air.
As shown in fig. 3, the auxiliary wind rotor 32 is disposed in the accommodating case 35, and the rotation speed of the auxiliary wind rotor 32 is adjusted according to the driving force transmitted from the auxiliary fan 33, for example, measured in revolutions per minute. The auxiliary wind wheel 32 can control the amount of air sucked around the air discharge port 3 by rotation. In addition, the auxiliary wind wheel 32 can control the direction of the discharged air flow by controlling the amount of air sucked around the air discharge port 3. Here, controlling the direction of the discharged air flow includes controlling the angle of the discharged air flow.
The suction air flow duct 34 includes a flow passage connecting the suction groove 3a to the auxiliary air outlet 3b, the suction groove 3a including an inlet to suck air around the discharge opening 3, and the auxiliary air outlet 3b including an outlet to discharge the sucked air. Here, the air suction groove 3a may be formed on the air guide curved surface 31 of the outer case expansion side wall 13, and the auxiliary air outlet 3b may be provided around the air outlet 3 at the opposite side to the air suction groove 3 a. Specifically, the secondary air outlet 3b may be formed on the accommodating case 35.
The air flow path 34 may include: a first flow passage 341 formed circumferentially outside the inner housing 1 to communicate with the outside, a second flow passage 342 configured to extend from the first flow passage 341 toward the radially inside, and a third flow passage 343 formed in the accommodation case 35. Accordingly, the air drawn through the air suction groove 3a may flow through the first, second, and third flow passages 341, 342, and 343 and be discharged through the auxiliary air outlet 3 b.
The air flow control unit may discharge the sucked air in a direction opposite to a direction in which the discharged air flows, may enlarge an angle of the discharged air flow, and may also facilitate control of the air flow.
In addition, the switching of the angle of the discharged airflow may be adjusted according to the amount of air drawn by the auxiliary wind wheel 32. That is, when the amount of air sucked by the auxiliary wind rotor 32 is large, the angle of the discharged air flow may be switched to a small angle, and when the amount of air sucked by the auxiliary wind rotor 32 is small, the angle of the discharged air flow may be switched to a large angle. Here, the angle of the discharged airflow is with respect to the surface of the ceiling. That is, the angle of the discharged airflow is 0 ° in the horizontal direction parallel to the surface of the ceiling and 90 ° in the direction perpendicular to the surface of the ceiling (i.e., the normal direction).
The air flow control unit may discharge the sucked air in a direction opposite to a direction in which the discharged air flows. By this, the angle of the discharged airflow can be enlarged, and the control of the airflow can be further facilitated. The auxiliary wind wheel 32 of the airflow control unit sucks in air from the radially outer portion of the air outlet 3 to widely spread the discharged airflow from the radially central portion of the air outlet 3 to the radially outer portion.
The indoor ceiling machine of the air conditioner according to the embodiment can control the discharged air flow even without the fan blade structure of the discharge part. That is, although the fan blade is disposed in the discharge portion and the discharged air flow is controlled by the rotation of the fan blade in the indoor unit of the conventional air conditioner, the air conditioner according to the embodiment may control the form of the discharged air flow even without the fan blade disposed on the discharge portion of the indoor unit. Here, the form of the discharged air flow may include the direction of the discharged air flow and the pattern of the discharged air flow. Therefore, since the fan blades do not interfere with the discharged air, the amount of the discharged air may be increased and the noise causing the air to flow may be reduced.
As shown in fig. 4, the airflow control unit of the indoor ceiling fan of the air conditioner may discharge air sucked around the air discharge port 3 into the inner cabinet 1, instead of discharging the air toward the air discharge port 3. The air flow control unit discharges the air sucked around the air discharge port 3 toward the upstream of the evaporator 23 according to the air flow direction. The air discharged in this manner is heat-exchanged again by passing through the evaporator 23, and then finally discharged to the indoor space through the air discharge outlet 3.
The auxiliary wind rotor 32 is disposed in the accommodating case 35, and the rotation speed of the auxiliary wind rotor 32 is adjusted according to the driving force transmitted from the auxiliary fan 33. The auxiliary wind wheel 32 can control the amount of air sucked around the air discharge port 3 by rotation. The auxiliary wind wheel 32 can control the direction of the discharged air flow by controlling the amount of air sucked around the air discharge port 3. Here, controlling the direction of the discharged air flow includes controlling the angle of the discharged air flow.
The air flow path 34 includes: an air suction groove 3a formed in the outer case expansion side wall 13 and configured to suck air around the air discharge outlet 3 to discharge the air sucked around the air discharge outlet 3 to the inside of the inner indoor unit casing 1; and a sub air outlet 3b formed in the inner case 1 and configured to discharge the sucked air.
The air flow path 34 includes: a first flow path 341 formed in a circumferential direction and configured to communicate with the suction groove 3 a; a second flow passage 342, the second flow passage 342 being configured to extend radially inward from the first flow passage 341; a third flow passage 343, the third flow passage 343 being formed in the accommodation case 35; and a fourth flow path 344, the fourth flow path 344 being configured to extend from the third flow path 343 to the inside of the inner casing 1 and to communicate with the secondary air outlet 3 b. Accordingly, the air drawn through the air suction groove 3a may flow through the first, second, third and fourth flow passages 341, 342, 343 and 344 and be discharged through the sub-air outlet 3 b.
As shown in fig. 4, the air flow control unit may be configured to suck air from a radially inner portion of the air discharge outlet 3, instead of sucking air from a radially outer portion of the air discharge outlet 3.
The auxiliary wind rotor 32 may be disposed in the receiving case 35, and the rotation speed of the auxiliary wind rotor 32 is adjusted according to the driving force transmitted from the auxiliary fan 33. The auxiliary wind wheel 32 can control the amount of air sucked around the air discharge port 3 by rotation. That is, the auxiliary wind wheel 32 can control the direction of the discharged air flow by sucking air around the air discharge port 3. Here, controlling the direction of the discharged air flow includes controlling the angle of the discharged air flow.
The air flow path 34 includes: an air suction groove 3a, which is provided at a radially inner portion of the air outlet 3, that is, on a surface of the third housing where the filter 14 is installed, to suck air around the air outlet 3; and a secondary air outlet 3b, the secondary air outlet 3b transferring the air sucked through the air suction groove 3a toward the evaporator 23. Further, the suction air flow duct 34 may include a first flow passage communicating with the suction groove 3a and a second flow passage simultaneously extending radially inward and communicating with the secondary air outlet 3 b.
As in the above case, the air flow control unit draws air from the radially inner portion of the air discharge port 3 so that the discharged air flow can be concentrated from the radially outer portion of the air discharge port 3 toward the radially central portion of the air discharge port 3.
Experiments show that the direction of the discharged airflow is related to the ratio of the rotating speed of the auxiliary wind wheel to the rotating speed of the main wind wheel, and the speed of the discharged airflow is related to the rotating speed value of the auxiliary wind wheel and the rotating speed value of the main wind wheel, namely, a comparison table can be obtained through multiple wind speed experiments, and the rotating speed of the main wind wheel and the rotating speed of the auxiliary wind wheel under the condition can be found in a one-to-one correspondence manner only by determining the deflection angle of the discharged airflow and the speed of the discharged airflow in the comparison table.
The invention also provides a ceiling machine exhaust control method, as shown in fig. 6, the method comprises the following steps:
s1: and determining the air outlet mode according to the user selection.
S2: and determining the initial rotating speed of the main wind wheel according to the temperature difference between the current evaporator coil temperature and the indoor temperature.
The initial rotating speed of the main wind wheel can be determined by inquiring a 'temperature difference-main wind wheel rotating speed' table pre-stored in the storage space of the air-conditioning control panel.
S3: and judging whether the duration time of the indoor temperature higher than the indoor target temperature exceeds a time period T2, if so, executing S4, otherwise, continuing to execute S3.
S4: determining the boundary rotating speed r of the auxiliary wind wheel according to the preset height h between the ceiling and the ground and the preset temperature control area S of the air conditionerfAnd boundary rotating speed r of main wind wheelz。
S5: the angle between the minimum opening angle alpha and the vertical normal is divided equally into N bisecting angles beta.
That is, N × β ═ 90 ° - α, where N is a preset number. As shown in fig. 5, the angle between the minimum opening angle α and the vertical normal is divided equally into 2 bisecting angles β, i.e., in fig. 5, 2 β is 90 ° - α.
S6: the air outlet direction and the normal line form included angles of 0, beta, 2 beta, … … and Nbeta respectively, and the air outlet direction of the air conditioner is controlled circularly according to the sequence.
S7: and judging whether the indoor temperature is reduced to be lower than the set temperature, if so, executing a normal air outlet mode, returning to S3, and if not, executing S6.
Specifically, as shown in fig. 7, the S1 includes:
s11: and starting to receive the air outlet mode option of the user.
S12: and determining to select a normal air-out mode or a rapid cooling mode according to user selection to control air-out, executing S2 when the normal air-out mode is selected, and executing S4 when the rapid cooling mode is selected.
Specifically, as shown in fig. 8, the S2 includes:
s21: and judging whether the indoor temperature exceeds a preset high-temperature threshold for a first time, if so, executing S22.
S22: and determining the initial rotating speed of the main wind wheel according to the temperature difference between the current evaporator coil temperature and the indoor temperature, and starting the main wind wheel at the determined initial rotating speed.
Specifically, as shown in fig. 9, the S4 includes:
s41: and determining the minimum opening angle alpha of the air direction of the air conditioner according to the preset height h between the ceiling and the ground and the preset temperature control area S of the air conditioner.
Specifically, as shown in fig. 5, the height h of the ceiling from the ground is a constant determined when the air conditioner is installed, and the height h can be manually input into a control panel of the air conditioner by an installer, and the preset temperature control area S of the air conditioner is also the manually set bottom area that the outlet air of the air conditioner is expected to cover.
Can be represented by formula
Figure BDA0001882355660000111
The minimum opening angle alpha of the air conditioner wind direction is determined.
S42: and determining the boundary wind speed V of the auxiliary wind wheel according to the minimum opening angle alpha and the height h of the ceiling from the ground.
In particular, according to the formula
Figure BDA0001882355660000112
And determining a boundary wind speed V, wherein T is a preset boundary wind overtime.
S43: determining the boundary rotating speed r of the auxiliary wind wheel according to the boundary wind speed V and the minimum opening angle alphafAnd boundary rotating speed r of main wind wheelz。
Since the boundary wind speed V and the minimum opening angle alpha are determined, the boundary rotating speed r of the main wind wheel in the condition can be determined by a table look-up modezAnd auxiliary rotor boundary speed rf。
Specifically, as shown in fig. 10, the S6 includes:
s61: and stopping the auxiliary wind wheel, resetting the counter, setting the first stop time as a preset time t, and rotating the main wind wheel according to the initial rotating speed of the main wind wheel in the normal air-out mode.
S62: for a first stop time.
S63: and judging whether the current count value M of the counter is N, if so, returning to S61, and if not, executing S64.
S64: the counter self-increments by 1 to obtain an updated count M.
S65: judging whether M is N, if so, determining the rotating speed r of the main wind wheel according to the boundary wind speed V and the minimum field angle alphaz1And auxiliary rotor speed rf1The preset boundary wind-over time T is set as the first stop time, and then S62 is executed, if not, S66 is executed.
S66: according to the formula
Figure BDA0001882355660000121
And calculating the current wind outlet speed V ', wherein T' can also be T.
Further, it can be represented by the formula
Figure BDA0001882355660000122
And calculating T', wherein Q is a preset correction parameter.
S67: and determining the rotating speed of the main wind wheel and the rotating speed of the auxiliary wind wheel in the condition in a table look-up mode according to the calculated current wind-out speed V' and the wind speed deflection angle value of 90-Mbeta.
S68: t' is determined as the new first stop time.
S69: determining the newly obtained main wind wheel rotating speed and the auxiliary wind wheel rotating speed as a new main wind wheel rotating speed rz1And auxiliary rotor speed rf1(ii) a And then returns to S62.
By adopting the method, the auxiliary wind wheel of the ceiling fan does not work at first, only the main wind wheel works, namely the ceiling fan only blows air to the right lower part, namely the included angle between the air-out direction and the normal line is 0 at the moment, and the air is continuously blown for the preset time t; then, the included angle between the air outlet direction and the normal line becomes beta, the duration of the air outlet time is T, then, the included angle between the air outlet direction and the normal line becomes 2 beta, 3 beta, N beta respectively, the duration of the air outlet time is T', then, the included angle between the air outlet direction and the normal line becomes 0 again, and the circulation is carried out.
The invention also provides a ceiling machine which uses the exhaust control method.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (5)

1. A ceiling machine exhaust control method is characterized by comprising the following steps:
s1: determining an air outlet mode according to user selection;
s2: determining the initial rotating speed of the main wind wheel according to the temperature difference between the current evaporator coil temperature and the indoor temperature;
s3: judging whether the duration time that the indoor temperature is higher than the indoor target temperature exceeds a time period T2, if so, executing S4, and if not, continuing executing S3;
s4: determining the boundary rotating speed r of the auxiliary wind wheel according to the preset height h between the ceiling and the ground and the preset temperature control area S of the air conditionerfAnd boundary rotating speed r of main wind wheelz(ii) a Wherein, the auxiliary wind wheel is arranged in the accommodating shell and generates suction force for sucking air around the air outlet;
s5: equally dividing the angle between the minimum opening angle alpha and the vertical normal into N bisection angles beta; wherein the direction perpendicular to the surface of the ceiling, i.e., the normal direction;
s6: respectively making the air outlet direction and the normal line form included angles of 0, beta, 2 beta, … … and Nbeta, and circularly controlling the air outlet direction of the air conditioner according to the sequence;
s7: judging whether the indoor temperature is reduced below a set temperature, if so, executing a normal air outlet mode, returning to S3, and if not, executing S6;
the S4 includes:
s41: determining the minimum opening angle alpha of the air direction of the air conditioner according to the preset height h between the ceiling and the ground and the preset temperature control area S of the air conditioner;
s42: determining a boundary wind speed V according to the minimum opening angle alpha and the height h of the ceiling from the ground;
s43: determining the boundary rotating speed r of the auxiliary wind wheel according to the boundary wind speed V and the minimum opening angle alphafAnd boundary rotating speed r of main wind wheelz；
The S41 includes:
by the formula
Figure FDA0002933230140000011
Determining the minimum opening angle alpha of the air conditioner wind direction;
the S42 includes: according to the formula
Figure FDA0002933230140000021
Determining a boundary wind speed V, wherein T is a preset boundary wind passing time;
the S43 includes: determining the boundary rotating speed r of the main wind wheel in a table look-up mode according to the boundary wind speed V and the minimum field angle alphazAnd auxiliary rotor boundary speed rf；
The S6 includes:
s61: stopping the rotation of the auxiliary wind wheel, resetting the counter, setting the first stop time as a preset time t, and rotating the main wind wheel according to the rotating speed in the normal wind outlet mode;
s62: continuing for a first stop time;
s63: judging whether the current count value M of the counter is N, if so, returning to S61, and if not, executing S64;
s64: the counter is added by 1 to obtain an updated count M;
s65: judging whether M is N, if so, determining the rotating speed r of the main wind wheel according to the boundary wind speed V and the minimum field angle alphaz1And auxiliary rotor speed rf1Setting a preset boundary wind-over time length T as a first stop time, and then executing S62, if not, executing S66;
s66: according to the formula
Figure FDA0002933230140000022
Calculating the current air outlet speed V ', wherein T' is T;
s67: determining the rotating speed of the main wind wheel and the rotating speed of the auxiliary wind wheel in a table look-up mode according to the calculated current wind outlet speed V' and the wind speed deflection angle value of 90-Mbeta;
s68: determining T' as a new first stop time;
s69: determining the newly obtained main wind wheel rotating speed and the auxiliary wind wheel rotating speed as a new main wind wheel rotating speed rz1And auxiliary rotor speed rf1And then returns to S62.
2. The method according to claim 1, wherein the S1 includes:
s11: starting, receiving an air outlet mode option of a user;
s12: and determining to select a normal air-out mode or a rapid cooling mode according to user selection to control air-out, executing S2 when the normal air-out mode is selected, and executing S4 when the rapid cooling mode is selected.
3. The method according to claim 1, wherein the S2 includes:
s21: judging whether the indoor temperature exceeds a preset high-temperature threshold for the first time, if so, executing S22;
s22: and determining the initial rotating speed of the main wind wheel according to the temperature difference between the current evaporator coil temperature and the indoor temperature, and starting the main wind wheel at the determined initial rotating speed.
4. The method according to claim 1, wherein the S66 includes:
according to the formula
Figure FDA0002933230140000031
And calculating T', wherein Q is a preset correction parameter.
5. A ceiling machine, characterized in that the ceiling machine uses the exhaust air control method of any one of claims 1 to 4.
CN201811429384.3A 2018-11-27 2018-11-27 Ceiling machine air exhaust control method and ceiling machine Active CN111219790B (en)

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