CN113790518A - Fan control method and air conditioning unit - Google Patents
Fan control method and air conditioning unit Download PDFInfo
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- CN113790518A CN113790518A CN202111101741.5A CN202111101741A CN113790518A CN 113790518 A CN113790518 A CN 113790518A CN 202111101741 A CN202111101741 A CN 202111101741A CN 113790518 A CN113790518 A CN 113790518A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005070 sampling Methods 0.000 claims abstract description 48
- 230000005669 field effect Effects 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009290 primary effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004078 waterproofing 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
- 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
- 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
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/52—Weather protecting means, e.g. against wind, rain or snow
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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)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method of a fan and an air conditioning unit. The control method of the fan comprises the following steps: setting a plurality of sampling points at the air outlet, and establishing a relation model of the operating parameters of each sub-fan and the wind field effect of each sampling point; establishing a function model with the minimum influence of the wind field effect of each sampling point on the average wind field effect; calculating to obtain specific values of the operating parameters of the sub-fans according to the relation model and the function model; and controlling each sub-fan according to the specific value of the operating parameter of each sub-fan. The invention can realize the adjustable air output of the fan and the uniform air output of each point at the air outlet.
Description
Technical Field
The invention relates to the technical field of fan control, in particular to a control method of a fan with uniform air output.
Background
In the prior art, a fan is generally adopted for equipment with an air outlet device, such as an air conditioning unit and the like, but if a fixed-frequency fan is adopted, the air quantity and the air speed can not be adjusted, and the air blown out from an air outlet is not uniform. If the variable frequency fan is adopted, although the air quantity and the air speed are adjustable, the air blown out from the air outlet is not uniform, and uncomfortable feeling is brought to people.
In addition, in some special occasions, the large fixed-frequency or variable-frequency motor cannot be used for unit development, for example, Shenzhen subway air conditioning unit project (Shenzhen subway for short), the Shenzhen region is hot in weather, the utilization rate of the air conditioning unit is very high, in order to meet the comfort level of a human body, the air supply quantity of the unit is required to be uniform, and the air supply quantity of the unit needs to be adjustable, so that the conventional fixed-frequency or variable-frequency large motor cannot be used for unit development. In addition, Shenzhen is close to the sea, and air is moist, salinity is high, and the unit still needs the corrosion resistance good, and is with low costs.
The existing air conditioning unit has the following problems to be solved:
1. the unit has the advantages of unadjustable air quantity, uneven air supply, poor energy-saving effect, no energy conservation and high energy consumption;
2. the machine set is not rainproof and waterproof;
3. the wire is not corrosion-resistant, fireproof and easy to break;
4. the rotating speed of the fan is not adjustable, the cost is high, and the control effect is not accurate.
Therefore, how to provide a new fan control method is an urgent technical problem to be solved in the industry.
Disclosure of Invention
The invention provides a control method of a fan and an air conditioning unit, and aims to solve the technical problem of uneven air supply quantity of the fan in the prior art.
The invention provides a control method of a fan, wherein the fan comprises a plurality of sub-fans with adjustable rotating speeds, and the control method of the fan comprises the following steps:
setting a plurality of sampling points at the air outlet, and establishing a relation model of the operating parameters of each sub-fan and the wind field effect of each sampling point;
establishing a function model with the minimum influence of the wind field effect of each sampling point on the average wind field effect;
calculating to obtain specific values of the operating parameters of the sub-fans according to the relation model and the function model;
and controlling each sub-fan according to the specific value of the operating parameter of each sub-fan.
Further, the relation model of the operating parameters of each sub-fan and the wind field effect of each sampling point is specifically a relation function between the wind speed of each sampling point and the rotating speeds of the corresponding sub-fans.
Further, the function model with the minimum influence of the wind field effect of each sampling point on the target wind field effect is specifically the function model with the minimum influence of the wind speed of each sampling point on the average wind speed of the air outlet.
Further, the function model is
N is the number of sampling points, vi is the wind speed at each sampling point,
is the average wind speed of the air outlet.
Further, the average wind speed of the air outlet is calculated according to a formula
And calculating to obtain the eta which is a proportionality coefficient, Q which is the target air volume of the fan, s which is the area of the air outlet and t which is the running time of the fan.
Further, the sub-fan is a direct current motor.
The air conditioning unit provided by the invention comprises a fan and a controller, wherein the fan is formed by combining a plurality of sub-fans with adjustable rotating speeds, and the controller controls the fan by adopting the fan control method in the technical scheme.
And further, carrying out unique identification on each sub-fan by adopting the communication address of each sub-fan.
Furthermore, the electric wire of the motor of the sub-fan is wired in the metal sleeve.
Furthermore, the metal sleeve is fixed on the back of the shell of the air conditioning unit through a wire fixing clamp.
Furthermore, the back of the shell of the air conditioning unit is also provided with a cover plate for covering the metal sleeve and the wire fixing clamp.
Furthermore, a waterproof cover is arranged on a seesaw switch of the air conditioning unit.
Further, the box body of the electric cabinet of the air conditioning unit is in closed locking connection with the box door when the box door is closed.
Further, the air conditioning unit is a combined air conditioning unit.
The invention adopts the coordination control of a plurality of small sub-fans (such as direct current motors), and effectively solves the problem of uniform air output of the existing large fan. The rotating speed of each sub-fan can be independently adjusted, and compared with the traditional fixed-frequency and variable-frequency single-large motor, the motor is more efficient and energy-saving, low in energy consumption and higher in control precision. When the invention is applied to the air conditioning unit, the invention also provides a corresponding technical scheme on the structure, and the waterproof and rainproof problems of the unit are solved through the waterproof design of the waterproof cover and the electric cabinet. Meanwhile, when the motor of the fan is used for wiring, the metal sleeve is fixed to the back of the unit shell through the wire fixing clamp and is further provided with a cover plate, the screw on the wire fixing clamp is prevented from being exposed, and the hidden danger of casualties is eliminated.
Drawings
The invention is described in detail below with reference to examples and figures, in which:
FIG. 1 is a flow chart of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an embodiment of the present invention.
FIG. 3 is a schematic structural view of a fan segment according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Thus, a feature indicated in this specification will serve to explain one of the features of one embodiment of the invention, and does not imply that every embodiment of the invention must have the stated feature. Further, it should be noted that this specification describes many features. Although some features may be combined to show a possible system design, these features may also be used in other combinations not explicitly described. Thus, the combinations illustrated are not intended to be limiting unless otherwise specified.
The principles of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in fig. 1, the fan in the control method of the fan of the present invention includes a plurality of sub-fans with adjustable rotation speed, and in a preferred embodiment, the fan may also be formed by combining a plurality of sub-fans with adjustable rotation speed, so that compared with the existing form of a large-air-volume fan, the air volume at the air outlet is more uniform. The sub-fans can adopt direct current fans and small variable frequency fans, in a preferred embodiment, a plurality of direct current fans are adopted to achieve the air volume of a large fixed frequency fan or a variable frequency fan, and when the air volume is more uniform, the implementation cost of the embodiment is lower, and the control is more convenient and easy to implement.
The control method of the fan needs to set a plurality of sampling points at the air outlet, the wind field effect of each sampling point can be influenced by the wind blown by a plurality of sub-fans with variable quantity, a relation model of the operating parameters of each sub-fan and the wind field effect of each sampling point needs to be established, the wind field effect can be the wind speed of the sampling point or the air output of the sampling point in unit time, for example, a wind speed sensor is arranged at each sampling point to sense the wind speed of each sampling point. The operation parameter of the sub-fan can be a rotating speed, and can also be an operation parameter such as voltage for determining the rotating speed. In one embodiment, the method establishes a relation function of the wind speed of each sampling point and the rotating speeds of the corresponding sub-fans. Wind speed v at each sampling pointiIs limited by the number of the sub-motors and the rotating speed of the single sub-motor, if the single sub-motor directly blows towards the central point, the central wind speed is maximum, and the wind speed of the part outside the central point of the air outlet isSmaller, each sub-motor also affects each other, and the more the number of the sub-motors is, the more the wind speed v at a single sampling point of the air outlet isiThe more complicated the influence of the sub-fans is, for example, at the jth sampling point, if an air conditioning unit is provided with m sub-fans, the wind speed v at the sampling pointjInfluenced by the rotating speed of the m sub-fans, and the actual wind speed v of the sampling pointjCan be expressed as vj＝y(v1j,v2j,v3j,v4j,...,vmj) Wherein y is a function, V1j-VmjIs a plurality of input parameters of function y, e.g. V1jIs the component of the speed of the first fan at the jth sampling point, VmjIs the component of the rotation speed of the mth fan at the jth sampling point. The matrix of the relationship between the wind speed V at the air outlet and the rotation speed of the motor can be expressed as V ═ V
Wherein m represents the number of direct current motors (EC motors), j represents the number of sampling points, and when the values of m and j approach infinity, the more uniform the wind speed of each sampling point at the air outlet is. When the fan is applied to an air conditioning unit, the number of EC motors arranged on the air conditioning unit can be determined when the unit is developed, the number of sampling points can also be determined in the debugging process or the actual use process, the speed generated by a single fan at a single point is synthesized according to a parallelogram method, the component of the wind speed blowing perpendicular to the plane where the air outlet is located is calculated during synthesis, then the wind speed and the wind volume generated at the sampling points are superposed by m EC motors, and the relational expression of the rotating speed n of the m EC motors and the wind speed at the jth sampling point is obtained
The wind speed v of the previous sampling point can be obtained by calculating the relationi。
And then establishing a function model with the minimum influence of the wind field effect of each sampling point on the average wind field effect, wherein in the specific embodiment, the function model is the function model with the minimum influence of the wind speed of each sampling point on the average wind speed of the air outlet.
The average wind speed of the air outlet can be calculated according to the formula
And calculating, wherein eta is a proportionality coefficient and can be obtained based on experimental data, Q is the target air volume of the fan, s is the area of the air outlet, the area of the air outlet is related to the whole structure of the equipment, the smaller the area of the air outlet is, the larger the air speed is on the premise of constant air volume, and t is the operation time of the fan, wherein the fan refers to the whole operation effect of a plurality of sub-fans when the fan is regarded as one fan. For example, in the prior art, one fixed-frequency fan is usually adopted to achieve a target air volume required by a user, and then the target air volume of the fan refers to a target air volume that needs to be achieved by a plurality of sub-fans and reaches one fixed-frequency fan.
After the average wind speed of the air outlet is obtained through the process, a function model is established
n is the number of sampling points, vi is the wind speed at each sampling point,
is the average wind speed of the air outlet. If g (v) in ideal conditionmin0, then represents the wind speed at each sampling point
The operation parameters of the sub-fans are calculated according to the relation model and the function model, and the sub-fans are controlled according to the specific values of the operation parameters of the sub-fans.
The control method of the fan adjusts the effect generated by adopting a single fixed-frequency motor or a variable-frequency high-power motor in the prior art into the cooperative control of a plurality of EC motors, can ensure that the air quantity at the air outlet is supplied evenly at each sampling point, and can not generate the conditions of large local air quantity and small partial air quantity, and the blown air is the air which can make human bodies feel comfortable. And the technical scheme of coordination control of a plurality of EC motors can solve the problem that the air volume of the fixed-frequency large motor is not adjustable. Meanwhile, the problems that air supply is not balanced and electric energy consumed by a large motor is large when the air quantity is controlled by controlling the rotating speed of a variable frequency motor on the traditional combined air conditioning unit are solved. The invention adopts a plurality of EC motors to coordinately control air supply, so that the unit is more efficient and energy-saving, and the control precision is more accurate.
As shown in fig. 2 and 3, the present invention also protects a corresponding air conditioning unit, where the air conditioning unit at least includes a fan and a controller, and the fan includes a plurality of sub-fans with adjustable rotation speed, and in a preferred embodiment, the fan is composed of a plurality of sub-motors 6 with adjustable rotation speed, and the controller controls the fan by using the control method of the above technical scheme. The air conditioning unit comprises but is not limited to a combined air conditioning unit, and when the air conditioning unit is the combined air conditioning unit, the air conditioning unit comprises an air inlet section 1, a primary effect electrostatic dust removal section 2, a fan section 3 and a noise elimination section 4. Wherein the fan and the electric cabinet 5 are both arranged on the fan section 4.
When each sub-fan 6 is controlled, the communication address of each sub-fan is used for uniquely identifying each sub-fan 6. Taking the EC fan as an example, there are 7 EC motors in fig. 3, the present invention does not limit the specific number of EC motors, the number is only an example, different numbers may be set based on different unit models, and the address identifying each EC motor may be extended. The default rotating speed of each EC motor can be adjusted in advance, for example, motors 1, 2, 3, 4 … and 7 are provided, the rotating speed of the motor 1 is set to be 20rad/s, the rotating speed of the motor 2 is set to be 40rad/s, or the like, the air conditioner can be different in structure according to different actual situations on site, and under the condition of meeting the requirement of cooling/heating air volume of a customer, the total air volume of an air outlet is the accumulation of air volumes generated by a plurality of EC motor rotating speeds, and the effect generated by the actual air outlet is taken as the standard. Under the prerequisite that satisfies the total amount of wind that the user required, calculate the rotational speed of sub-fan for a plurality of sub-fans operate according to different rotational speeds or same rotational speed, make the wind field effect that the unit air supply came out even, let the user experience more comfortable.
Structurally, the wires of the motors of all the sub-fans are wired in the metal sleeve, so that the wires of the motors are not easy to cut off, and the fireproof performance is good. The metal sleeve is fixed on the back of the shell of the air conditioning unit through the wire fixing clamp, so that the damage to operators who maintain and debug the air conditioning unit by screws on the wire fixing clamp can be avoided. And further can also set up the apron that covers metal sleeve and solidus clamp at the casing back of air conditioning unit, it is more pleasing to the eye like this, has further avoided the injury to operating personnel moreover.
In addition, be equipped with the buckler on air conditioning unit's the switch, the switch includes but not limited to seesaw switch, and the box and the chamber door of air conditioning unit's electric cabinet are closed locking connection when closing to the electric cabinet adopts water joint, realizes air conditioning unit's electrical apparatus switch's waterproof function.
The air conditioning unit solves the problem that the air quantity of the existing air conditioning unit is not adjustable, the air quantity and the air speed of each point of the air outlet are the same, the problems of no rain and water proofing of an electric control box, a seesaw switch and the like are solved, the problems of difficulty in wiring of a motor, difficulty in wiring and cutting of wires and fire prevention of the unit are solved, the rotating speed of each sub-fan can be adjusted through software, and the adjustment is more flexible and convenient. According to the invention, the air quantity of the unit is controlled by adopting the plurality of sub-motors in a cooperative manner, so that the air quantity of the unit is uniform from a plurality of angles, the control is realized, the regulation precision is high, the energy is saved, the environment is protected, and the energy consumption and the noise of the unit are reduced. Can realize just can setting up the amount of wind through the host computer, secondary maintenance can also be carried out to the later stage.
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 and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A control method of a fan is characterized in that the fan comprises a plurality of sub-fans with adjustable rotating speeds, and the control method of the fan comprises the following steps:
setting a plurality of sampling points at the air outlet, and establishing a relation model of the operating parameters of each sub-fan and the wind field effect of each sampling point;
establishing a function model with the minimum influence of the wind field effect of each sampling point on the average wind field effect;
calculating to obtain specific values of the operating parameters of the sub-fans according to the relation model and the function model;
and controlling each sub-fan according to the specific value of the operating parameter of each sub-fan.
2. The fan control method according to claim 1, wherein the relational model between the operating parameters of the sub-fans and the wind field effect at each sampling point is a relational function between the wind speed at each sampling point and the rotational speeds of the corresponding sub-fans.
3. The fan control method according to claim 1, wherein the function model with the smallest influence of the wind field effect of each sampling point on the target wind field effect is specifically the function model with the smallest influence of the wind speed of each sampling point on the average wind speed of the wind outlet.
4. The method of controlling a wind turbine according to claim 3, wherein the function model is
N is the number of sampling points, vi is the wind speed at each sampling point,
is the average wind speed of the air outlet.
5. The fan control method of claim 4, wherein the average wind speed at the wind outlet is calculated by a formula
Is calculated to obtain
And the ratio coefficient is Q, the target air quantity of the fan is Q, s is the area of the air outlet, and t is the running time of the fan.
6. The method of controlling a fan of claim 1, wherein the sub-fan is a dc motor.
7. An air conditioning unit, comprising a fan and a controller, wherein the fan comprises a plurality of sub-fans with adjustable rotating speed, and the controller controls the fan by adopting the fan control method according to any one of claims 1 to 6.
8. The air conditioning assembly as set forth in claim 7, wherein each sub-fan is uniquely identified by its communication address.
9. The air conditioning unit according to claim 7, wherein the wires of the motors of the sub-fans are routed in a metal sleeve, the metal sleeve is fixed on the back of the casing of the air conditioning unit through a wire fixing clip, and a cover plate covering the metal sleeve and the wire fixing clip is further arranged on the back of the casing of the air conditioning unit.
10. The air conditioning unit as set forth in claim 7, wherein said air conditioning unit is a modular air conditioning unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111101741.5A CN113790518A (en) | 2021-09-18 | 2021-09-18 | Fan control method and air conditioning unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111101741.5A CN113790518A (en) | 2021-09-18 | 2021-09-18 | Fan control method and air conditioning unit |
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| CN115659567A (en) * | 2021-12-30 | 2023-01-31 | 安徽工业大学 | A Method for Optimizing the Setting Value of Fans in Rail Transit |
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| CN114963386B (en) * | 2022-06-02 | 2024-01-05 | 安徽辰沐建筑工程有限公司 | Fresh air system for high-rise building and control method thereof |
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Application publication date: 20211214 |