阅读说明：本技术 一种风机转速控制方法及空调器 (Fan rotating speed control method and air conditioner ) 是由 吕东建 谢文科 廖宜利 李琪铎 周挺 蔡莹 于 2021-08-17 设计创作，主要内容包括：本发明公开了一种风机转速控制方法及空调器,包括以下步骤：预先建立风机转速参数和冷凝压力的映射关系；当风机工作时,实时获取压缩机的冷凝压力；根据压缩机的冷凝压力和所述映射关系确定风机转速参数；根据所述风机转速参数调节风机的转速。本发明的一种风机转速控制方法及空调器,基于风机转速参数和冷凝压力之间的映射关系可得到风机转速参数,通过风机转速参数对风机的转速进行调节,能实现连续平滑地调控风机的转速,空调制冷效果的波动幅度小,有利于实现对空调制冷的良好控制。(The invention discloses a fan rotating speed control method and an air conditioner, which comprise the following steps: pre-establishing a mapping relation between a fan rotating speed parameter and a condensing pressure; when the fan works, the condensing pressure of the compressor is obtained in real time; determining a fan rotating speed parameter according to the condensing pressure of the compressor and the mapping relation; and adjusting the rotating speed of the fan according to the fan rotating speed parameter. According to the fan rotating speed control method and the air conditioner, the fan rotating speed parameter can be obtained based on the mapping relation between the fan rotating speed parameter and the condensing pressure, the rotating speed of the fan is adjusted through the fan rotating speed parameter, the rotating speed of the fan can be continuously and smoothly regulated, the fluctuation range of the air conditioner refrigerating effect is small, and the good control of the air conditioner refrigerating is facilitated.)

1. A fan rotating speed control method is characterized by comprising the following steps:

pre-establishing a mapping relation between a fan rotating speed parameter and a condensing pressure;

when the fan works, the condensing pressure of the compressor is obtained in real time;

determining a fan rotating speed parameter according to the condensing pressure of the compressor and the mapping relation;

and adjusting the rotating speed of the fan according to the fan rotating speed parameter.

2. The fan speed control method according to claim 1, wherein the fan speed parameter and the condensing pressure of the compressor are mapped in a relationship of:

V＝A×P²+B×P+C

wherein V is a fan rotating speed parameter, P is a condensing pressure of the compressor, A is a preset first constant, B is a preset second constant, and C is a preset third constant.

3. The fan rotation speed control method according to claim 1, wherein before the real-time acquisition of the condensing pressure of the compressor, the method further comprises:

detecting whether the fan is in a shutdown state;

if so, judging whether the condensing pressure of the compressor is not less than the set fan starting pressure;

if not, acquiring the condensation pressure of the compressor in real time;

after judging whether the condensing pressure of compressor is not less than the set fan starting pressure, still include:

if so, acquiring the condensation pressure of the compressor in real time;

if not, preheating the fan, and enabling the fan to operate for a first preset time length according to a preset initial rotating speed parameter; and after preheating is completed, the fan skips to obtain the condensation pressure of the compressor in real time.

4. The fan rotation speed control method according to claim 1, wherein after the real-time acquisition of the condensing pressure of the compressor, further comprising;

judging whether the condensing pressure of the compressor is greater than the set fan stopping pressure and less than the set fan starting pressure;

if so, the fan operates for a second set time according to a preset initial rotating speed parameter, and then the condensing pressure of the compressor is obtained in real time;

if not, judging whether the condensing pressure of the compressor is not more than the set fan stopping pressure or not;

after judging whether the condensing pressure of compressor is less than the set fan stop pressure, still include:

if so, the fan executes a shutdown program;

if not, determining a fan rotating speed parameter according to the condensation pressure of the compressor and the mapping relation.

5. The fan rotating speed control method according to claim 2, wherein a curve section formed by a mapping relation between the fan rotating speed parameter and the condensing pressure of the compressor is a continuous curve which gradually rises along with the increase of the condensing pressure when the starting pressure of the fan is set to be equal to or less than the condensing pressure of the compressor and the maximum working pressure of the fan is set to be equal to the X axis and the rotating speed percentage of the fan is set to be the Y axis, and the continuous curve is a curve which protrudes upwards.

6. The fan rotating speed control method according to claim 2, wherein a curve segment formed by a mapping relation between the fan rotating speed parameter and the condensing pressure of the compressor is a continuous curve which gradually rises along with the increase of the condensing pressure and is a concave curve when the condensing pressure is taken as an X axis and the fan rotating speed percentage is taken as a Y axis and the set fan starting pressure is less than or equal to the condensing pressure of the compressor and less than the set maximum working pressure of the fan.

7. The fan speed control method according to claim 2, wherein before the pre-establishing the mapping relationship between the fan speed parameter and the condensing pressure, the method further comprises:

setting a first curve calibration parameter P₁And a second curve calibration parameter V₁；

Calibrating a parameter P according to the first curve₁And said second curve calibration parameter V₁Calculating the first, second and third constants A, B, C, wherein:

A＝[(V_max-V₁)/(P_max-P₁)-(V₁-V_min)/(P₁-P₀)]/(P_max-P₀)

B＝(V₁-V_min)/(P₁-P₀)-A×(P₀+P₁)

wherein, V_maxSetting a maximum speed percentage, V, for the fan_minSetting a minimum speed percentage, P, for the fan_maxTo correspond to V_maxSet maximum pressure value, P₀To correspond to V_minA set minimum pressure value.

8. An air conditioner, comprising a memory and a processor, wherein the memory stores an air conditioner control program operable on the processor, and the air conditioner control program, when executed by the processor, implements the fan rotation speed control method according to any one of claims 1 to 7.

Technical Field

The invention relates to the field of air conditioners, in particular to a fan rotating speed control method and an air conditioner.

Background

The holistic energy consumption of air conditioning unit can direct influence by the regulation of fan rotational speed, and traditional scheme can be provided with different condensing pressure interval, and every condensing pressure interval all is provided with invariable fan rotational speed parameter, and control system can be according to the condensing pressure interval that the condensing pressure of compressor is located, regulates and control the rotational speed of fan.

The prior art has the following defects: under the condition of different condensing pressures, the rotating speeds of the fans are different, so that the rotating speed adjustment of the fans is discontinuous, and when the fans are switched among different rotating speeds, the refrigerating effect of the air conditioner is easy to fluctuate.

In view of the above, a method for controlling the rotational speed of a fan and an air conditioner are needed to solve the above problems.

Disclosure of Invention

The invention aims to provide a fan rotating speed control method and an air conditioner, and solves the problem that the fluctuation of the refrigeration effect of the air conditioner is large due to the fact that the fan rotating speed is discontinuously adjusted.

In order to achieve the purpose, the invention adopts the following technical scheme:

a fan rotating speed control method comprises the following steps:

s01, pre-establishing a mapping relation between a fan rotating speed parameter and a condensing pressure;

s02, when the fan works, acquiring the condensing pressure of the compressor in real time;

s03, determining a fan rotating speed parameter according to the condensing pressure of the compressor and the mapping relation;

and S04, adjusting the rotating speed of the fan according to the fan rotating speed parameter.

Optionally, the mapping relationship between the fan rotation speed parameter and the condensing pressure of the compressor is as follows:

V＝A×P²+B×P+C

wherein V is a fan rotating speed parameter, P is a condensing pressure of the compressor, A is a preset first constant, B is a preset second constant, and C is a preset third constant.

Optionally, before the real-time obtaining of the condensing pressure of the compressor, the method further includes:

s011, detecting whether the fan is in a shutdown state;

if so, judging whether the condensing pressure of the compressor is not less than the set fan starting pressure;

if not, acquiring the condensation pressure of the compressor in real time;

s012, after judging whether the condensing pressure of compressor is not less than the fan starting pressure of setting for, still include:

if so, acquiring the condensation pressure of the compressor in real time;

s013, if not, preheating the fan, and enabling the fan to operate for a first preset time length according to a preset initial rotating speed parameter; and after preheating is completed, the fan skips to obtain the condensation pressure of the compressor in real time.

Optionally, after the real-time obtaining of the condensing pressure of the compressor, the method further includes;

s021, judging whether the condensing pressure of the compressor is greater than the set fan stopping pressure and less than the set fan starting pressure;

if yes, the fan operates for a second set time according to the preset initial rotating speed parameter, and then the condensing pressure of the compressor is obtained in real time;

s023, if not, judging whether the condensing pressure of the compressor is not more than the set fan stop pressure;

after judging whether the condensing pressure of compressor is less than the set fan stop pressure, still include:

s024, if yes, executing a shutdown program by the fan;

if not, determining a fan rotating speed parameter according to the condensation pressure of the compressor and the mapping relation.

Optionally, when the detected pressure value is taken as an X axis, the percentage of the fan rotation speed is taken as a Y axis, and when the set fan starting pressure is less than or equal to the condensing pressure of the compressor and less than the set fan maximum working pressure, a curve section formed by a mapping relation between the fan rotation speed parameter and the condensing pressure of the compressor is a continuous curve which gradually rises along with the increase of the condensing pressure, and the continuous curve is an upward convex curve.

Optionally, when the condensing pressure is taken as an X axis, the percentage of the rotating speed of the fan is taken as a Y axis, and when the starting pressure of the fan is set to be less than or equal to the condensing pressure of the compressor and less than the maximum working pressure of the fan, a curve segment formed by a mapping relation between the rotating speed parameter of the fan and the condensing pressure of the compressor is a continuous curve which gradually rises along with the increase of the condensing pressure, and the continuous curve is a concave curve.

Optionally, before the mapping relationship between the fan rotation speed parameter and the condensing pressure is pre-established, the method further includes:

s001, setting a first curve calibration parameter P₁And a second curve calibration parameter V₁；

S002, calibrating the parameter P according to the first curve₁And said second curve calibration parameter V₁Calculating the first, second and third constants A, B, C, wherein:

A＝[(V_max-V₁)/(P_max-P₁)-(V₁-V_min)/(P₁-P₀)]/(P_max-P₀)

B＝(V₁-V_min)/(P₁-P₀)-A×(P₀+P₁)

wherein, V_maxSetting a maximum speed percentage, V, for the fan_minSetting a minimum speed percentage, P, for the fan_maxTo correspond to V_maxSet maximum pressure value, P₀To correspond to V_minA set minimum pressure value.

An air conditioner comprises a memory and a processor, wherein the memory stores an air conditioner control program which can run on the processor, and the air conditioner control program realizes the fan rotating speed control method according to any one of the above items when being executed by the processor.

Compared with the prior art, the invention has the following beneficial effects:

in the embodiment of the invention, the mapping relation between the fan rotating speed parameter and the condensing pressure is established, after the condensing pressure of the compressor is obtained, the fan rotating speed parameter can be obtained based on the mapping relation between the fan rotating speed parameter and the condensing pressure, the rotating speed of the fan is regulated through the fan rotating speed parameter, the rotating speed of the fan can be continuously and smoothly regulated, the fluctuation range of the air-conditioning refrigeration effect is small, and the good control on the air-conditioning refrigeration is favorably realized.

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, and 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 these drawings without inventive exercise.

The structure, proportion, size and the like shown in the drawings are only used for matching with the content disclosed in the specification, so that the person skilled in the art can understand and read the description, and the description is not used for limiting the limit condition of the implementation of the invention, so the method has no technical essence, and any structural modification, proportion relation change or size adjustment still falls within the scope of the technical content disclosed by the invention without affecting the effect and the achievable purpose of the invention.

Fig. 1 is a flowchart of a method for controlling a rotational speed of a fan according to an embodiment of the present invention;

FIG. 2 is a flow chart of a method for controlling a rotational speed of a fan according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a mapping relationship curve between a fan rotation speed parameter and a condensing pressure according to an embodiment of the present invention.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. It should be noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Example one

The embodiment of the invention provides a fan rotating speed control method, which is used for reducing the fluctuation of a fan to an air conditioner during rotating speed adjustment and realizing good control on the refrigeration effect of the air conditioner. The air conditioner comprises a fan, a compressor and other necessary components.

The method for controlling the rotating speed of the fan in the embodiment comprises the following steps:

referring to fig. 1 and 2, the method for controlling the rotational speed of the fan includes the following steps:

s01, pre-establishing a mapping relation between a fan rotating speed parameter and a condensing pressure;

s02, when the fan works, acquiring the condensing pressure of the compressor in real time;

s03, determining a fan rotating speed parameter according to the condensing pressure of the compressor and the mapping relation;

and S04, adjusting the rotating speed of the fan according to the fan rotating speed parameter.

It is worth explaining that when the curve formed by the mapping relation between the fan rotating speed parameter and the condensing pressure is in continuous smooth transition, the adjustment of the rotating speed of the fan can be continuously and smoothly carried out, the rotating speed of the fan cannot generate large jump, the refrigerating effect of the air-conditioning system cannot generate large fluctuation, and therefore the good control of the refrigerating effect of the air-conditioning system is realized. The established mapping relation between the fan rotating speed parameter and the condensing pressure can be a quadratic function or a cubic function.

V＝A×P²+B×P+C

Wherein V is a fan rotating speed parameter, P is a condensing pressure of the compressor, A is a preset first constant, B is a preset second constant, and C is a preset third constant.

Specifically, V ═ a × P²The curve formed by + BxP + C is in continuous smooth transition, and the shape of the curve can be adjusted by reasonably setting the first parameter A, the second parameter B and the third parameter C, so that the rotation speed adjustment of the fan can be better suitable for different use environments, the rotation speed adjustment of the fan can be continuously and smoothly carried out, and the good control of the refrigeration effect of the air-conditioning system is realized.

Optionally, before the real-time obtaining of the condensing pressure of the compressor, the method further includes:

s011, detecting whether the fan is in a shutdown state;

if so, judging whether the condensing pressure of the compressor is not less than the set fan starting pressure;

if not, acquiring the condensation pressure of the compressor in real time;

s012, after judging whether the condensing pressure of compressor is not less than the fan starting pressure of setting for, still include:

if so, acquiring the condensation pressure of the compressor in real time;

if not, preheating the fan, and enabling the fan to operate for a first preset time length according to a preset initial rotating speed parameter; and after preheating is completed, the fan skips to obtain the condensation pressure of the compressor in real time.

It should be clear that, in a low temperature state, the change of the rotation speed of the fan can cause the change of the condensation pressure of the compressor to be too large, thereby causing the unstable air-conditioning refrigeration effect. Therefore, in the starting stage of the fan, the fan works according to the preset initial rotating speed parameter for the first timeThe set time is long, and the condition that the low-pressure alarm of the system is caused by the rapid change of the rotating speed of the fan when the fan just starts to work is avoided. Wherein the first preset time period may be 5 minutes, 10 minutes or other time period. In addition, the predetermined initial rotational speed parameter is generally designated as V ═ a × P²The starting point value of the curve formed by + B × P + C, i.e., the preset initial rotation speed parameter, is the minimum value of the curve.

Optionally, after the real-time obtaining of the condensing pressure of the compressor, the method further includes;

s021, judging whether the condensing pressure of the compressor is greater than the set fan stopping pressure and less than the set fan starting pressure;

s022, if yes, operating the fan for a second set time according to a preset initial rotating speed parameter, and then acquiring the condensing pressure of the compressor in real time;

s023, if not, judging whether the condensing pressure of the compressor is not more than the set fan stop pressure;

after judging whether the condensing pressure of compressor is less than the set fan stop pressure, still include:

s024, if yes, executing a shutdown program by the fan;

if not, determining a fan rotating speed parameter according to the condensation pressure of the compressor and the mapping relation.

It should be clear that, in the operation process of the air conditioner, the condensation pressure of the compressor needs to be judged in real time, and when the condensation pressure of the compressor is not greater than the set fan stop pressure, the fan can meet the refrigeration requirement without working, so that the fan executes a shutdown program; when the condensing pressure of the compressor is not less than the set fan starting pressure, adjusting the rotating speed of the fan according to the mapping relation; and when the set fan stop pressure is smaller than the condensing pressure of the compressor and smaller than the set fan starting pressure, the condensing pressure of the compressor is acquired in real time after the fan operates for a second set time according to the preset initial rotating speed parameter. If it is determined as no in step S024, since it is determined that the condensing pressure of the compressor is not less than the set fan activation pressure at this time, the process proceeds to step S03: and determining a fan rotating speed parameter according to the condensing pressure of the compressor and the mapping relation.

Optionally, when the condensing pressure is taken as an X axis, the percentage of the rotating speed of the fan is taken as a Y axis, and when the starting pressure of the fan is set to be less than or equal to the condensing pressure of the compressor and less than the maximum working pressure of the set fan, a curve segment formed by a mapping relation between the rotating speed parameter of the fan and the condensing pressure of the compressor is a continuous curve which gradually rises along with the increase of the condensing pressure, and the continuous curve is an upward convex curve.

Optionally, when the condensing pressure is taken as an X axis, the percentage of the rotating speed of the fan is taken as a Y axis, and when the starting pressure of the fan is set to be less than or equal to the condensing pressure of the compressor and less than the maximum working pressure of the fan, a curve segment formed by a mapping relation between the rotating speed parameter of the fan and the condensing pressure of the compressor is a continuous curve which gradually rises along with the increase of the condensing pressure, and the continuous curve is a concave curve.

It should be noted that different continuous curves may be required to adjust the speed of the fan for different environments in which the air conditioner is located. The values of the first constant A, the second constant B and the third constant C are reasonably changed, so that the effect of changing the rising curvature of the continuous curve can be achieved. For example, when the continuous curve is a concave curve, when the condensing pressure of the compressor is at a lower value (i.e. when the outdoor temperature is lower), and when the condensing pressure of the compressor rises to a unit pressure, the increment of the rotating speed of the fan is smaller, the cooling effect of the air conditioner slowly rises, and the current temperature requirement is met; when the condensing pressure of the compressor is at a higher value (namely, when the outdoor temperature is higher), when the condensing pressure of the compressor rises to unit pressure, the rotating speed increment of the fan is larger, the cooling effect of the air conditioner is more obvious, and the air conditioner is more difficult to report high pressure and stop.

Optionally, before the mapping relationship between the fan rotation speed parameter and the condensing pressure is pre-established, the method further includes:

s001, setting a first curve calibration parameter P₁And a second curve calibration parameter V₁；

S002, calibrating the parameter P according to the first curve₁And said second curve calibration parameter V₁Calculating the first constant A, the second constantA second constant B and the third constant C, wherein:

A＝[(V_max-V₁)/(P_max-P₁)-(V₁-V_min)/(P₁-P₀)]/(P_max-P₀)

B＝(V₁-V_min)/(P₁-P₀)-A×(P₀+P₁)

wherein, V_maxSetting a maximum speed percentage, V, for the fan_minSetting a minimum speed percentage, P, for the fan_maxTo correspond to V_maxSet maximum pressure value, P₀To correspond to V_minA set minimum pressure value. It should be noted that V_maxMeans setting the ratio of the maximum rotation speed of the fan to the rated rotation speed of the fan, V_minThe method is characterized by setting the ratio of the minimum rotating speed of the fan to the rated rotating speed of the fan.

It should be clear that the parameter P is calibrated by appropriate setting of the first curve₁And a second curve calibration parameter V₁Can make the quadratic function relation V equal to A × P²The shape of the control curve generated by the + BxP + C is changed, so that the control method is suitable for controlling the rotating speed of the fan of the air conditioner in different states. For example, setting P₀＝21，P_max＝30，V_max＝100，V_minWhen it is 20, and the fan stop pressure P_stopWhen P is 19₁-P₀2 and V₁-V_minThe first constant a has a value of 0.9844, the second constant B has a value of-41.3015, and the third constant C has a value of 453.3333 when 4, as shown in fig. 3, where the quadratic function is at P₀≤P≤P_maxIn the range, the curve segment generated in the planar rectangular coordinate system is a concave curve.

Also, P₀＝21，P_max＝30，V_max＝100，V_minWhen it is 20, and the fan stop pressure P_stopWhen P is 19₁-P₀2 and V₁-V_minWhen the value is 5, the curve segment generated by the quadratic function relation in the plane rectangular coordinate system has a concave degree compared with P₁-P₀2 and V₁-V_minThe curve section formed by 4 is more shallow. Specifically, a reasonable first curve calibration parameter P may be set according to the actual environment of the air conditioner₁And a second curve calibration parameter V₁Therefore, the requirement of adjusting the rotating speed of the fans of different types of air conditioners can be met. In addition, P can be reasonably set for different types of air conditioners₀，P_max，V_max，V_min，P_stopThereby further increasing the application range of the fan rotation speed control method. When it should be clear, at setting P₀，P_max，V_max，V_min，P_stopAfter a value of (3), continuously adjusting P₁Or V₁The value of (b) is obtained by adjusting the trend of the continuous curve, so that the upward projection degree or the downward projection degree of the continuous curve is more obvious. In summary, only P is adjusted₁And/or V₁The value of (A) is changed by changing the trend of the continuous curve, so that the operation is easy and the adjustment is simple.

Example two

An air conditioner comprises a memory and a processor, wherein the memory stores an air conditioner control program which can run on the processor, and the air conditioner control program realizes the fan rotating speed control method in the first embodiment when being executed by the processor.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.