CN114636238A - Motor temperature rise control method - Google Patents
Motor temperature rise control method Download PDFInfo
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- CN114636238A CN114636238A CN202210410400.4A CN202210410400A CN114636238A CN 114636238 A CN114636238 A CN 114636238A CN 202210410400 A CN202210410400 A CN 202210410400A CN 114636238 A CN114636238 A CN 114636238A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
- F24F11/67—Switching between heating and cooling modes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
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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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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Power Engineering (AREA)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a motor temperature rise control method. The motor temperature rise control method comprises the following steps: obtaining the surface temperature T of the motor and the initial air outlet temperature T at the air outlet of the air conditioning device0(ii) a Judging the relationship between the surface temperature T and a first preset temperature value A, and if the surface temperature T is greater than or equal to the first preset temperature value A, controlling the rotating speed r of the motor to reduce a preset rotating speed value delta r; if the surface temperature T is less thanA first preset temperature value A for obtaining the air outlet temperature T at the air outlet at the moment1And initial outlet air temperature T0The temperature difference value between the air conditioner and the air conditioner increases the air output of the air conditioner or maintains the current air output according to the temperature difference value; judging the relative position of the motor in the air conditioning device, and adjusting the value of a preset rotating speed value delta r according to the relative position and/or the operation mode of the air conditioning device; the operation mode comprises a cooling mode and a heating mode. The invention effectively solves the problem of overhigh temperature rise of the motor in the operation process in the prior art.
Description
Technical Field
The invention relates to the technical field of air conditioning devices, in particular to a motor temperature rise control method.
Background
At present, a motor is usually arranged in an air conditioning device, and the motor generates driving torque to provide a power source for fan blades of the air conditioning device so as to enable the fan blades to normally run.
However, in the operation process of the air conditioner, the motor itself generates a large amount of heat, which not only causes the over-high temperature of the motor to shorten the service life of the motor, but also affects the use safety of the air conditioner, and reduces the operation efficiency of the motor and affects the heat exchange efficiency of the air conditioner.
Disclosure of Invention
The invention mainly aims to provide a motor temperature rise control method to solve the problem that the temperature rise of a motor is too high in the operation process in the prior art.
In order to achieve the above object, the present invention provides a motor temperature rise control method, including: obtaining the surface temperature T of the motor and the initial air outlet temperature T at the air outlet of the air conditioning device0(ii) a Judging the relation between the surface temperature T and a first preset temperature value A, and if the surface temperature T is greater than or equal to the first preset temperature value A, controlling the rotating speed r of the motor to reduce by a preset rotating speed value delta r; if the surface temperature T is less than the first preset temperature value A, the air outlet temperature T at the air outlet is obtained1And initial air-out temperature T0The temperature difference value between the air conditioner and the air conditioner increases the air output of the air conditioner or maintains the current air output according to the temperature difference value; determining the relative position of the motor in the air conditioner based on the sum of the relative positionsAdjusting the value of a preset rotating speed value delta r by the operating mode of the air conditioning device; the operation mode comprises a cooling mode and a heating mode.
Further, the method for increasing the air output of the air conditioning device or maintaining the current air output according to the temperature difference value comprises the following steps: if the temperature difference value is greater than or equal to a second preset temperature value B, increasing the air output of the air conditioning device; if the temperature difference value is less than a second preset temperature value B, controlling the air conditioning device to maintain the current air output; wherein the second preset temperature value B is greater than or equal to 3 ℃ and less than or equal to 6 ℃.
Further, the method for increasing the air output of the air conditioner comprises the following steps: the air deflector of the air conditioner device is controlled to rotate by a preset air outlet angle so as to increase the air outlet quantity of the air conditioner device.
Further, the method for judging the relative position of the motor in the air conditioner comprises the following steps: judging the height relation between the motor and a reference surface S of the air conditioner; wherein the reference surface S is located at a height H1The overall height H of the air conditioner satisfies the following conditions: h1＝1/2H。
Further, the method for adjusting the value of the preset rotation speed value Δ r according to the relative position and/or the operation mode of the air conditioning device includes: if the motor is positioned above the reference surface S, adjusting the value of a preset rotating speed value delta r according to the operation mode of the air conditioning device; and if the motor is positioned below the reference surface S, the value of the preset rotating speed value delta r is unchanged.
Further, the method for adjusting the value of the preset rotation speed value delta r according to the operation mode of the air conditioning device comprises the following steps: if the air conditioner is in the cooling mode, the preset rotating speed value delta r is set as a first preset value r1(ii) a If the air conditioner is in the heating mode, the preset rotation speed value delta r is set as a second preset value r2(ii) a Wherein the second preset value r2Greater than a first predetermined value r1。
Further, a second preset value r2And a first preset value r1Satisfies the following conditions: r is1＜r2≤3r1。
Further, after the rotating speed r of the motor is controlled to be reduced by the preset rotating speed value delta r, the surface temperature T is obtained in real time, and if the surface temperature T is larger than or equal to the first preset temperature value A, the rotating speed r of the motor is controlled to be reduced by the preset rotating speed value delta r until the surface temperature T is smaller than the first preset temperature value A.
Further, when the surface temperature T is less than the first preset temperature value a, the air outlet temperature T at the air outlet at the moment is obtained1And judging the air-out temperature T1And initial outlet air temperature T0The temperature difference therebetween.
Further, the surface temperature T is obtained through the first temperature detection device, and when the surface temperature T is smaller than a first preset temperature value A, the current rotating speed r of the motor is detected by a rotating speed sensor of the air conditioning device0And controlling the second temperature detection device to acquire the air outlet temperature T at the air outlet at the moment1Judging the air-out temperature T1And initial air-out temperature T0The temperature difference therebetween.
Further, the surface temperature T is obtained through a first temperature detection device, the rotating speed r of the motor is detected through a rotating speed sensor of the air conditioning device at intervals of preset time, and the air outlet temperature T is obtained through a second temperature detection device of the air conditioning device at intervals of preset time1When the surface temperature T is less than a first preset temperature value A, the current rotating speed r of the motor is obtained0While obtaining the outlet air temperature T1Judging the air-out temperature T1And initial air-out temperature T0The temperature difference therebetween.
By applying the technical scheme of the invention, the surface temperature T of the motor and the initial air outlet temperature T at the air outlet of the air conditioning device are obtained in real time0And adjusting the rotating speed r of the motor according to the relation between the surface temperature T and the first preset temperature value A so as to reduce the surface temperature T of the motor by reducing the rotating speed r of the motor. Wherein, the reduction value (presetting rotational speed value delta r) of rotational speed r is adjusted according to the relative position of the motor in the air conditioner and/or the operation mode of the air conditioner, and then the rapid cooling of the motor is realized on the premise of not influencing the normal operation of the air conditioner, and then the problem that the temperature of the motor is excessively increased in the operation process in the prior art is solved, the surface temperature T of the motor is ensured to be less than a first preset temperature value A, the service life of the motor is prolonged, and the service life of the air conditioner is reducedAnd (4) energy consumption.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram illustrating a motor located above a reference surface S according to a first embodiment of the method for controlling temperature rise of a motor of the present invention;
FIG. 2 is a control flow diagram illustrating a method of controlling temperature rise of the motor of FIG. 1;
fig. 3 is a schematic structural diagram illustrating a motor located below a reference surface S according to a second embodiment of the method for controlling temperature rise of a motor of the present invention.
Wherein the figures include the following reference numerals:
10. an electric motor.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is to be noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present invention, unless stated to the contrary, use of the directional terms "upper and lower" are generally directed to the orientation shown in the drawings, or to the vertical, or gravitational direction; likewise, for ease of understanding and description, "left and right" are generally to the left and right as shown in the drawings; "inner and outer" refer to the inner and outer relative to the profile of the respective member itself, but the above directional terms are not intended to limit the present invention.
In order to solve the problem that the temperature of a motor is too high in the operation process in the prior art, the application provides a motor temperature rise control method.
Example one
As shown in fig. 1 and 2, the motor temperature-rise control method includes:
obtaining the surface temperature T of the motor 10 and the initial air outlet temperature T at the air outlet of the air conditioning device0；
Judging the relationship between the surface temperature T and a first preset temperature value A, and if the surface temperature T is greater than or equal to the first preset temperature value A, controlling the rotating speed r of the motor 10 to reduce by a preset rotating speed value delta r; if the surface temperature T is less than the first preset temperature value A, the air outlet temperature T at the air outlet is obtained1And initial outlet air temperature T0The temperature difference value between the air conditioner and the air conditioner increases the air output of the air conditioner or maintains the current air output according to the temperature difference value;
and judging the relative position of the motor 10 in the air conditioning device, and adjusting the value of the preset rotating speed value delta r according to the relative position and/or the operation mode of the air conditioning device. The operation mode comprises a cooling mode and a heating mode.
By applying the technical scheme of the embodiment, the surface temperature T of the motor 10 and the initial air outlet temperature T at the air outlet of the air conditioning device are obtained in real time0The rotation speed r of the motor is adjusted according to the relationship between the surface temperature T and the first preset temperature value a, so as to reduce the surface temperature T of the motor 10 by reducing the rotation speed r of the motor 10. Wherein, the reduction value (preset rotation speed value delta r) of the rotation speed r is adjusted according to the relative position of the motor 10 in the air conditioner and/or the operation mode of the air conditioner, so as to realize the rapid cooling of the motor 10 on the premise of not influencing the normal operation of the air conditioner, thereby solving the problem that the temperature of the motor is excessively increased in the operation process in the prior art, ensuring that the surface temperature T of the motor 10 is less than a first preset temperature value A, prolonging the service life of the motor 10 and reducing the energy consumption of the air conditioner.
In the present embodiment, the first preset temperature value a is between 120 ℃ and 150 ℃.
In this embodiment, the rotating speed r of the motor 10 is adjusted through real-time detection, so that the surface temperature T of the motor 10 is reduced while the user experience perception of the air conditioner is not influenced, the loss of the air conditioning device is reduced, meanwhile, the overheating loss of the motor can be prevented, and the service life of the motor 10 is prolonged.
Optionally, the method for increasing the air output of the air conditioning device or maintaining the current air output according to the temperature difference value includes:
if the temperature difference value is greater than or equal to a second preset temperature value B, increasing the air output of the air conditioning device;
and if the temperature difference value is less than a second preset temperature value B, controlling the air conditioning device to maintain the current air output. Wherein the second preset temperature value B is greater than or equal to 3 ℃ and less than or equal to 6 ℃.
Specifically, if the outlet air temperature T is lower than the predetermined value1If the temperature difference value between the air conditioner and the second preset temperature value B is greater than or equal to the second preset temperature value B, the air outlet temperature T of the air conditioner at the moment is judged1If a large deviation occurs, the air output is increased to make up the deviation; if the outlet air temperature T1The temperature difference value between the motor and the second preset temperature value B is smaller than the second preset temperature value B, and then the judgment that the cooling of the motor does not influence the air outlet temperature T of the air conditioning device is made1The air output of the air conditioner does not need to be adjusted.
In the present embodiment, the second preset temperature value B is 4 ℃.
It should be noted that the value of the second preset temperature value B is not limited to this, and may be adjusted according to the working condition and the use requirement. Optionally, the second predetermined temperature value B is 3.5 ℃, or 3.8 ℃, or 4.5 ℃, or 4.8 ℃, or 5 ℃, or 5.5 ℃, or 5.8 ℃.
Optionally, the method for increasing the air output of the air conditioner comprises the following steps:
the air deflector of the air conditioner device is controlled to rotate by a preset air outlet angle so as to increase the air outlet quantity of the air conditioner device.
Specifically, the control system of the air conditioner controls the air deflector to rotate so as to increase the air output at the air deflector, and further realize the air outlet temperature T of the air conditioner1Until the temperature difference value is smaller than a second preset temperature value B.
In this embodiment, the control system controls the air deflector to rotate to the position of the maximum air outlet angle, so that the air conditioner performs air outlet at the maximum air outlet amount, and the rapid compensation of the temperature difference is realized.
In the present embodiment, the method of determining the relative position of the motor 10 in the air conditioner includes:
judging the height relation between the motor 10 and a reference surface S of the air conditioner; wherein the reference surface S is located at a height H1The overall height H of the air conditioner satisfies the following conditions: h1＝1/2H。
Specifically, the relative position of the motor 10 in the air conditioner is determined through the height position relationship between the motor 10 and the reference surface S, so that the determination of the relative position of the motor 10 is easier and simpler, and the determination accuracy is improved.
Optionally, the method for adjusting the value of the preset rotation speed value Δ r according to the relative position and/or the operation mode of the air conditioning device includes:
if the motor 10 is located above the reference surface S, adjusting the value of the preset rotation speed value Δ r according to the operation mode of the air conditioning device;
if the motor 10 is located below the reference plane S, the value of the preset rotation speed value Δ r is unchanged.
Specifically, if the motor 10 is above the reference surface S, different operation modes of the air conditioning device correspond to different preset rotation speed values Δ r one to one, and then the motor 10 is rapidly cooled. If the motor 10 is located below the reference plane S, the preset rotation speed value Δ r is always unchanged no matter what operation mode the air conditioning device is in, thereby reducing the difficulty in adjusting the rotation speed r of the motor.
In this embodiment, the motor 10 is located above the reference plane S, so that the internal structure layout of the air conditioner is more reasonable and compact, and the internal space utilization rate of the air conditioner is improved.
In this embodiment, the method for adjusting the value of the preset rotation speed Δ r according to the operation mode of the air conditioner includes:
if the air conditioner is in the cooling mode, the preset rotating speed value delta r is set as a first preset value r1；
If the air conditioner is in the heating mode, the preset rotation speed value delta r is set as a second preset value r2(ii) a Wherein the second preset value r2Greater than a first predetermined value r1。
Specifically, the motor 10 is located above the reference surface S when the air conditioner device isWhen in the refrigeration mode, the rotating speed r of the control motor is reduced by a first preset value r1If the surface temperature T of the decelerated motor 10 is still greater than or equal to the first preset temperature value a, the motor 10 is controlled to continue decelerating until the surface temperature T of the motor 10 is less than the first preset temperature value a. When the air conditioner is in the heating mode, the rotation speed r of the control motor is reduced by a second preset value r2If the surface temperature T of the decelerated motor 10 is still greater than or equal to the first preset temperature value a, the motor 10 is controlled to continue decelerating until the surface temperature T of the motor 10 is less than the first preset temperature value a.
Optionally, the second preset value r2And a first preset value r1Satisfies the following conditions: r is1＜r2≤3r1。
In the present embodiment, r1Is 10r/min, r2Is 20r/min, r2＝2r1. It should be noted that the second preset value r2And a first preset value r1The numerical relationship between the two is not limited to the above, and can be adjusted according to the working conditions and the use requirements. Alternatively, r2＝1.2r1Or r2＝1.5r1Or r2＝1.8r1。
In this embodiment, after the rotation speed r of the motor 10 is controlled to decrease by the preset rotation speed value Δ r, the surface temperature T is obtained in real time, and if the surface temperature T is greater than or equal to the first preset temperature value a, the rotation speed r of the motor 10 is controlled to decrease by the preset rotation speed value Δ r until the surface temperature T is less than the first preset temperature value a.
In this embodiment, when the surface temperature T is less than the first preset temperature value a, the air outlet temperature T at the air outlet is obtained at this time1And judging the air-out temperature T1And initial outlet air temperature T0The temperature difference therebetween.
In this embodiment, the surface temperature T is obtained by the first temperature detecting device, and when the surface temperature T is less than the first preset temperature value a, the rotation speed sensor of the air conditioner is controlled to detect the current rotation speed r of the motor 100And controlling the second temperature detection device to acquire the air outlet temperature T at the air outlet at the moment1Judging the air-out temperature T1And initiationOutlet air temperature T0The temperature difference therebetween.
Note that the rotation speed sensor for controlling the air conditioner detects the current rotation speed r of the motor 100And controlling the second temperature detection device to acquire the outlet air temperature T1The method is not limited to the above, and can be adjusted according to the working condition and the use requirement.
In other embodiments, not shown in the figures, the surface temperature T is obtained by a first temperature detection device, the rotation speed r of the motor 10 is detected by a rotation speed sensor of the air conditioning unit at preset intervals, and the outlet air temperature T is obtained by a second temperature detection device of the air conditioning unit at preset intervals1When the surface temperature T is less than the first preset temperature value a, the current rotation speed r of the motor 10 is obtained0While obtaining the outlet air temperature T1Judging the air-out temperature T1And initial air-out temperature T0The temperature difference therebetween.
Specifically, when the air conditioner is in the cooling mode, the motor 10 reaches the stable rotation speed r according to the control system and the user requirement, and the temperature at the air outlet is the initial air outlet temperature T0. When the surface temperature T of the motor 10 is detected to be more than or equal to 120 ℃, the rotating speed r of the motor is controlled to be reduced by 10r/min, the surface temperature T is detected in real time while the rotating speed is reduced, if the surface temperature T is still more than or equal to 120 ℃, the rotating speed r is correspondingly reduced by 10r/min, the operation is repeated until the surface temperature T is less than 120 ℃, and then the current rotating speed r of the motor is output0At the output of the current rotational speed r0Detect the air outlet temperature T of the air outlet at this moment simultaneously1If the temperature difference value T between the two is less than1-T0The temperature of the air deflector is controlled to be opened to the maximum air outlet position when the temperature is more than or equal to 4 ℃, and if the temperature difference value T between the air deflector and the maximum air outlet position is larger than or equal to 4 DEG C1-T0If the temperature is less than 4 ℃, the position of the air deflector is unchanged according to the position set by the user.
In the heating mode of the air conditioner, the surface temperature T after the motor is operated is higher than that in the cooling mode in consideration of the fact that hot air drifts upward in the heating mode, and therefore the reduced rotation speed of the motor is higher than that in the cooling mode. When the surface temperature T of the motor 10 is detected to be more than or equal to 120 ℃, the rotating speed r of the motor is controlled to be reduced by 20r/min, the surface temperature T is detected in real time while the rotating speed is reduced, and if the surface temperature T is detected to be more than or equal to 120 DEG CIf the temperature T is still more than or equal to 120 ℃, the rotating speed r is correspondingly reduced by 20r/min, the process is circulated until the surface temperature T is less than 120 ℃, and the current rotating speed r of the output motor is output at the moment0At the output of the current rotational speed r0Detect the air outlet temperature T of the air outlet at this moment simultaneously1If the temperature difference value T between the two is less than1-T0The temperature of the air deflector is controlled to be opened to the maximum air outlet position when the temperature is more than or equal to 4 ℃, and if the temperature difference value T between the air deflector and the maximum air outlet position is larger than or equal to 4 DEG C1-T0If the temperature is less than 4 ℃, the position of the air deflector is unchanged according to the position set by the user.
Example two
The difference between the motor temperature rise control method in the second embodiment and the first embodiment is that: the relative position of the motor in the air conditioning unit varies.
As shown in fig. 3, since the motor 10 is located below the reference surface S, there is no need to consider a problem of an increase in the ambient temperature around the motor due to hot air during heating, and thus the control method in the cooling mode and the heating mode is the same. After the air conditioner is started, the motor 10 rotates, the air conditioner updates the record in real time, when the surface temperature T of the motor 10 is detected to be larger than or equal to 120 ℃, the rotating speed r of the motor is controlled to be reduced by 10r/min, the rotating speed is reduced while the surface temperature T is detected in real time, if the surface temperature T is still larger than or equal to 120 ℃, the rotating speed r is correspondingly reduced by 10r/min, the operation is repeated until the surface temperature T is smaller than 120 ℃, and the current rotating speed r of the motor is output at the moment0At the output of the current rotational speed r0Detect the air outlet temperature T of the air outlet at this moment simultaneously1If the temperature difference value T between the two is less than1-T0The temperature of the air deflector is controlled to be opened to the maximum air outlet position when the temperature is more than or equal to 4 ℃, and if the temperature difference value T between the air deflector and the maximum air outlet position is larger than or equal to 4 DEG C1-T0If the temperature is less than 4 ℃, the position of the air deflector is unchanged according to the position set by the user.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
acquiring the surface temperature T of a motor and the initial air outlet temperature T at an air outlet of an air conditioning device in real time0And adjusting the rotating speed r of the motor according to the relation between the surface temperature T and the first preset temperature value A so as to reduce the surface temperature T of the motor by reducing the rotating speed r of the motor. Wherein the rotational speed rThe reduction value (preset rotation speed value delta r) is adjusted according to the relative position of the motor in the air conditioner and/or the operation mode of the air conditioner, so that the motor is quickly cooled on the premise of not influencing the normal operation of the air conditioner, the problem that the temperature of the motor is excessively increased in the operation process in the prior art is solved, the surface temperature T of the motor is ensured to be smaller than a first preset temperature value A, the service life of the motor is prolonged, and the energy consumption of the air conditioner is reduced.
It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A motor temperature rise control method is characterized by comprising the following steps:
obtaining the surface temperature T of the motor (10) and the initial air outlet temperature T at the air outlet of the air conditioning device0；
Judging the relation between the surface temperature T and a first preset temperature value A, and if the surface temperature T is greater than or equal to the first preset temperature value A, controlling the rotating speed r of the motor (10) to reduce by a preset rotating speed value delta r; if the surface temperature T is smaller than the first preset temperature value A, the air outlet temperature T at the air outlet is obtained at the moment1And the initial air outlet temperature T0The air output of the air conditioning device is increased or the current air output is maintained according to the temperature difference value;
judging the relative position of the motor (10) in the air conditioning device, and adjusting the value of the preset rotating speed value delta r according to the relative position and/or the operation mode of the air conditioning device; wherein the operation mode includes a cooling mode and a heating mode.
2. The motor temperature-rise control method according to claim 1, wherein the method of increasing the air-out volume of the air conditioner or maintaining the current air-out volume according to the temperature difference value comprises:
if the temperature difference value is greater than or equal to a second preset temperature value B, increasing the air output of the air conditioning device;
if the temperature difference value is smaller than a second preset temperature value B, controlling the air conditioning device to maintain the current air output;
wherein the second preset temperature value B is greater than or equal to 3 ℃ and less than or equal to 6 ℃.
3. The motor temperature-rise control method according to claim 1, wherein the method of increasing the air output of the air conditioning device includes:
and controlling an air deflector of the air conditioner device to rotate by a preset air outlet angle so as to increase the air outlet quantity of the air conditioner device.
4. The motor temperature-rise control method according to claim 1, wherein the method of determining the relative position of the motor (10) in the air conditioner includes:
judging the height relation between the motor (10) and a reference surface S of the air conditioner;
wherein the reference surface S is located at a height H1And the overall height H of the air conditioner satisfies the following conditions: h1＝1/2H。
5. The motor temperature-rise control method according to claim 4, wherein the method of adjusting the value of the preset rotation speed value Δ r according to the relative position and/or the operation mode of the air conditioning device comprises:
if the motor (10) is positioned above the reference surface S, adjusting the value of the preset rotating speed value delta r according to the operation mode of the air conditioning device;
and if the motor (10) is positioned below the reference surface S, the value of the preset rotating speed value delta r is unchanged.
6. The motor temperature rise control method according to claim 1, wherein the method of adjusting the value of the preset rotation speed value Δ r according to the operation mode of the air conditioning device includes:
if the air conditioner is in a refrigeration mode, setting the preset rotating speed value delta r as a first preset value r1；
If the air conditioner is in the heating mode, the preset rotating speed value delta r is set as a second preset value r2；
Wherein the second preset value r2Greater than the first preset value r1。
7. The motor temperature-rise control method according to claim 6, wherein the second preset value r is2And the first preset value r1Satisfies the following conditions: r is a radical of hydrogen1＜r2≤3r1。
8. The motor temperature rise control method according to claim 1, wherein the surface temperature T is obtained in real time after the rotation speed r of the motor (10) is controlled to decrease by a preset rotation speed value Δ r, and if the surface temperature T is greater than or equal to the first preset temperature value a, the rotation speed r of the motor (10) is controlled to decrease by the preset rotation speed value Δ r until the surface temperature T is less than the first preset temperature value a.
9. The motor temperature rise control method according to claim 1, wherein when the surface temperature T is less than the first preset temperature value a, the outlet air temperature T at the air outlet at that time is obtained1And judging the air outlet temperature T1And the initial air outlet temperature T0The temperature difference therebetween.
10. The motor temperature-rise control method according to claim 1, wherein the surface temperature T is obtained by a first temperature detection device, and when the surface temperature T is less than the first preset temperature value a, a rotation speed sensor of the air conditioning device is controlled to detect the current rotation speed r of the motor (10)0And controlling a second temperature detection device to acquire the air outlet temperature T at the air outlet at the moment1And judging the air outlet temperature T1And the initial air outlet temperature T0The temperature difference therebetween.
11. The motor temperature rise control method according to claim 1, wherein the surface temperature T is obtained by a first temperature detecting device, the rotational speed r of the motor (10) is detected by a rotational speed sensor of the air conditioning device at intervals of a preset time, and the outlet air temperature T is obtained by a second temperature detecting device of the air conditioning device at intervals of the preset time1When the surface temperature T is less than the first preset temperature value A, the current rotating speed r of the motor (10) is obtained0While obtaining the outlet air temperature T1And judging the air outlet temperature T1And the initial air outlet temperature T0The temperature difference therebetween.
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