CN112034341A - Working condition identification method and device of variable frequency range hood - Google Patents

Abstract

The invention belongs to the technical field of range hoods, and particularly relates to a working condition identification method and device of a variable-frequency range hood. The working condition identification method comprises the step of matching corresponding working condition information for each of N working conditions of the motor, wherein the working condition information comprises a target current I_{N mesh}And a target rotational speed V_{N mesh}(ii) a Starting the variable frequency range hood, detecting the first actual rotating speed V of the motor_x(ii) a The first actual rotating speed V of this time_xThe calibration rotating speed V under each working condition obtained by the previous oil smoke adhesion calibration_{N calibration}Comparing to obtain N different rotating speeds delta V_N(ii) a If a certain differential rotational speed DeltaV_NWithin the tolerance range, the motor is at the difference rotating speed delta V_NAnd operating according to the working condition information in the corresponding working condition. The working condition identification method and the working condition identification device can effectively solve the problem that the working condition identification of the current variable frequency range hood is not accurate enough。

Description

Working condition identification method and device of variable frequency range hood

Technical Field

The invention belongs to the technical field of range hoods, and particularly relates to a working condition identification method and device of a variable-frequency range hood.

Background

The frequency conversion cigarette machine on the market at present adopts the mode control of permanent moment of torsion to do the pertinence processing not discerning the frequency conversion cigarette machine operating mode, thereby lead to the performance to experience not nimble enough, fail to give play to the motor performance of frequency conversion cigarette machine completely.

Some cigarette machines mainly follow the biggest amount of wind, the biggest static pressure and practical smoking effect is discerned and is gone out reasonable aspect and promote user experience and performance parameter, but operating mode discernment is not accurate enough, and throughput is limited.

Disclosure of Invention

The invention provides a working condition identification method of a variable frequency range hood, aiming at solving the problem that the working condition identification of the current variable frequency range hood is not accurate enough.

The invention also provides a working condition identification device adopting the working condition identification method.

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

a working condition identification method of a variable frequency range hood comprises the following steps:

matching corresponding working condition information for each of N working conditions of the motor, wherein the working condition information comprises a target current I_{N mesh}And a target rotational speed V_{N mesh}；

Starting the variable frequency range hood, detecting the first actual rotating speed V of the motor_x；

The first actual rotating speed V of this time_xThe calibration rotating speed V under each working condition obtained by the previous oil smoke adhesion calibration_{N calibration}Comparing to obtain N different rotating speeds delta V_N(ii) a If a certain differential rotational speed DeltaV_NWithin the tolerance range, the motor is at the difference rotating speed delta V_NAnd operating according to the working condition information in the corresponding working condition.

The operating condition identification method of the variable frequency range hood is further improved in that the method further comprises the following steps:

when the variable frequency range hood leaves the factory, the variable frequency range hood leaves the factoryAccurately, obtaining the factory calibration rotating speed V under each working condition_{N is out}。

The operating condition identification method of the variable frequency cigarette machine is further improved in that the oil smoke attachment calibration comprises the following steps:

target current I of motor under working condition_{N mesh}Operating to obtain the second actual rotating speed V of the motor_yAccording to the second actual speed V_yAnd the frequency conversion smoke machine leaves the factory and calibrates the rotational speed V under this kind of operating mode_{N is out}Obtaining the oil smoke attachment coefficient Q;

obtaining the calibration rotating speed V under each working condition according to the oil smoke adhesion coefficient Q_{N calibration}。

The working condition identification method of the variable frequency range hood is further improved in that the working condition identification method is based on the second actual rotating speed V_yAnd the frequency conversion smoke machine leaves the factory and calibrates the rotational speed V under this kind of operating mode_{N is out}Obtaining an oil smoke adhesion coefficient Q, which is specifically as follows:

the oil fume attachment coefficient Q is the second actual rotating speed V_yFactory calibration rotating speed V under the working condition_{N is out}The ratio of (a) to (b).

The method for identifying the working condition of the variable-frequency range hood is further improved in that the calibration rotating speed V under each working condition is obtained according to the oil smoke adhesion coefficient Q_{N calibration}The method specifically comprises the following steps:

calibration rotating speed V under each working condition_{N calibration}Calibrating the rotation speed V for oil smoke attachment coefficient Q and leaving factory under corresponding working conditions_{N is out}The product of (a).

The further improvement of the working condition identification method of the variable frequency cigarette making machine is that the concrete steps of factory calibration of the variable frequency cigarette making machine comprise:

target current I of motor under certain working condition_{N mesh}Operating to obtain the third actual rotating speed V of the motor_zAccording to the third actual speed V_zAnd target rotational speed V under the condition_{N mesh}Determining a factory difference coefficient K;

obtaining the factory calibration rotation under each working condition through the factory difference coefficient KSpeed V_{N is out}。

The working condition identification method of the variable frequency range hood is further improved in that the working condition identification method is based on the third actual rotating speed V_zAnd target rotational speed V under the condition_{N mesh}Determining a factory difference coefficient K, specifically:

the difference coefficient K of leaving factory is the third actual rotating speed V_zTarget rotating speed V under the working condition_{N mesh}The ratio of (a) to (b).

The method for identifying the working condition of the variable frequency range hood is further improved in that the factory calibration rotating speed V under each working condition is obtained through the factory difference coefficient K_{N is out}The method specifically comprises the following steps:

factory calibration rotating speed V under each working condition_{N is out}The difference coefficient K of leaving factory and the target rotating speed V under corresponding working conditions_{N mesh}The product of (a).

The working condition identification method of the variable frequency range hood is further improved in that the difference rotating speed delta V_NIs the first actual rotating speed V_xThe calibration rotating speed V under each working condition obtained by the previous oil smoke adhesion calibration_{N calibration}The absolute value of the difference of (a).

The working condition identification method of the variable frequency cigarette machine is further improved in that the tolerance range is 100 rpm-200 rpm.

The operating condition identification method of the variable frequency range hood is further improved in that the method further comprises the following steps: target current I of N working conditions_{N mesh}And (6) sorting.

The invention also provides a working condition recognition device of the variable frequency range hood, which comprises a control unit, a current output unit and a rotating speed detection unit;

a current output unit electrically connected with the control unit for inputting a target current I under a certain working condition to the motor_{N mesh}；

A rotation speed detection unit electrically connected with the control unit for detecting the current first actual rotation speed V of the motor_x；

A control unit for controlling the motor to perform one of N operating conditionsThe working condition is matched with corresponding working condition information, and the working condition information comprises a target current I_{N mesh}And a target rotational speed V_{N mesh}；

The control device is used for controlling the starting or closing of the variable frequency range hood;

and is also used for converting the current first actual rotating speed V_xThe calibration rotating speed V under each working condition obtained by the previous oil smoke adhesion calibration_{N calibration}Comparing to obtain N different rotating speeds delta V_N(ii) a If a certain differential rotational speed DeltaV_NWithin the tolerance range, the motor is at the difference rotating speed delta V_NAnd operating according to the working condition information in the corresponding working condition.

Compared with the prior art, the invention adopting the scheme has the beneficial effects that:

in the invention, firstly, corresponding working condition information is matched for each working condition in N working conditions of the motor; secondly, detecting the first actual rotating speed V of the motor at this time_x(ii) a Finally, the first actual rotating speed V is calculated₁The calibration rotating speed V under each working condition obtained by the previous oil smoke adhesion calibration_{N calibration}Comparing and judging a certain differential rotation speed delta V_NWhether be in the tolerance within range to this operating mode that judges the motor and locate just so effectually avoids appearing because the oil smoke adheres to and leads to the problem of great deviation to appear in the operating mode identification process, and further improvement operating mode discernment's accuracy, the effectual operating mode of solving present frequency conversion cigarette machine discerns not accurate enough problem.

In addition, the working condition recognition device of the variable frequency range hood adopts the working condition recognition method, so that the problem that the current working condition recognition of the variable frequency range hood is not accurate at least can be effectively solved.

Drawings

FIG. 1 is a flow chart of a method for identifying the working condition of a variable frequency range hood provided in embodiment 1 of the present invention;

FIG. 2 is another flow chart of a method for identifying operating conditions of a variable frequency range hood according to embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of a system block diagram of a working condition recognition device of a variable frequency range hood according to embodiment 2 of the present invention;

in the figure: 1. a control unit; 2. a current output unit; 3. and a rotation speed detection unit.

Detailed Description

So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The meaning of "plurality" is two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "fixed," and the like are to be construed broadly and can include, for example, fixed connections, detachable connections, or integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Example 1

The embodiment provides a working condition identification method of a variable frequency range hood, and as shown in fig. 1 and fig. 2, the method comprises the following steps:

s1, matching corresponding working condition information for each working condition in the N working conditions of the motor, wherein the working condition information comprises the target current I_{N mesh}And a target rotational speed V_{N mesh}；

WhereinN is a positive integer greater than or equal to 0, and target current I_{N mesh}Representing the target current under the Nth working condition; target rotational speed V_{N mesh}Representing the target speed in the nth operating condition.

For example, in this embodiment, the motor has 16 operating conditions, which are 0 operating condition, 1 operating condition, and 2 operating condition · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·.

Preferably, the target current I under N working conditions is used_{N mesh}Sequencing, e.g. by comparing target currents I under N conditions_{N mesh}Arranged in the order from small to large to obtain I_{0 mesh}、I_{1 mesh screen}、I_{2 mesh}、·····I_{N mesh}。

The target current I under N working conditions can be used_{N mesh}Arranged in the order from big to small to obtain I_{N mesh}·····I_{1 mesh screen}、I_{0 mesh}。

S2, when the variable frequency cigarette machine leaves the factory, the variable frequency cigarette machine is subjected to factory calibration to obtain factory calibration rotating speed V under each working condition_{N is out}；

Carrying out factory calibration on the variable frequency cigarette machine to obtain factory calibration rotating speed V under each working condition_{N is out}The method specifically comprises the following steps:

s21, target current I of motor under certain working condition_{N mesh}Operating to obtain the third actual rotating speed V of the motor_zAccording to the third actual speed V_zAnd target rotational speed V under the condition_{N mesh}Determining a factory difference coefficient K;

wherein, the factory difference coefficient K is the third actual rotating speed V_zTarget rotating speed V under the working condition_{N mesh}I.e. K ═ V_zTarget speed V under this condition_{N mesh}；

S22, obtaining factory calibration rotating speed V under each working condition through the factory difference coefficient K_{N is out}；

Wherein, the factory calibration rotating speed V under each working condition_{N is out}The difference coefficient K of leaving factory and the target rotating speed V under corresponding working conditions_{N mesh}The product of (a).

For example: when the frequency conversion range hood is subjected to factory calibration, the motor is 0Target current I under operating conditions_{0 mesh}Operating to obtain the third actual rotating speed V of the motor_z(ii) a The factory difference coefficient K is then: k is V_z/V_{0 mesh}；

The corresponding factory calibration rotating speed V under N working conditions_{N is out}Respectively as follows: KxV_{0 mesh}、K×V_{1 mesh screen}、K×V_{2 mesh}、K×V_{3 mesh screen}、K×V_{4 mesh}······K×V_{N mesh}。

For another example, when the variable frequency range hood is subjected to factory calibration, the target current I of the motor under 3 working conditions_{3 mesh screen}Operating to obtain the third actual rotating speed V of the motor_z(ii) a The factory difference coefficient K is then: k is V_z/V_{3 mesh screen}；

The corresponding factory calibration rotating speed V under N working conditions_{N is out}Respectively as follows: KxV_{0 mesh}、K×V_{1 mesh screen}、K×V_{2 mesh}、K×V_{3 mesh screen}、K×V_{4 mesh}······K×V_{N mesh}。

S3, starting the variable frequency range hood, and detecting the first actual rotating speed V of the motor_x；

S4, converting the first actual rotating speed V_xThe calibration rotating speed V under each working condition obtained by the previous oil smoke adhesion calibration_{N calibration}Comparing to obtain N different rotating speeds delta V_N(ii) a If a certain differential rotational speed DeltaV_NWithin the tolerance range, the motor is at the difference rotating speed delta V_NAnd operating according to the working condition information in the corresponding working condition.

Further, the calibration rotating speed V under each working condition_{N calibration}Obtained by the following method:

target current I of motor under working condition_{N mesh}Operating to obtain the second actual rotating speed V of the motor_yAccording to the second actual speed V_yAnd the frequency conversion smoke machine leaves the factory and calibrates the rotational speed V under this kind of operating mode_{N is out}Obtaining the oil smoke attachment coefficient Q;

obtaining the calibration rotating speed V under each working condition according to the oil smoke adhesion coefficient Q_{N calibration}。

Wherein the oil smoke adheres toThe coefficient Q is the second actual speed V_yFactory calibration rotating speed V under the working condition_{N is out}I.e. Q ═ V_yFactory calibration rotating speed V under such working condition_{N is out}；

Calibration rotating speed V under each working condition_{N calibration}Calibrating the rotation speed V for oil smoke attachment coefficient Q and leaving factory under corresponding working conditions_{N is out}The product of (a).

For example, when the variable frequency range hood is in operation, the variable frequency range hood is identified to be in the 8 th working condition, and the second actual rotating speed V of the motor is acquired at the moment_yThen the soot adhesion coefficient Q ═ V_y/V_{8 out}And passes through the calibrated V of the factory_{8 out}＝K×V_{8 mesh}So that Q is equal to V_y/(K×V_{8 mesh})。

Corresponding calibration rotating speed V under N working conditions_{N calibration}Respectively as follows: QxV_{0 out}、Q×V_{1 out}、Q×V_{0 out}、Q×V_{0 out}、Q×V_{0 out}、Q×V_{0 out}·····Q×V_{N is out}Combined with factory calibration of the factory calibration speed V under each working condition_{N is out}It can be known that the calibration rotating speed V under N working conditions_{N calibration}Respectively as follows: q × (K × V)_{0 mesh})、Q×(K×V_{1 mesh screen})、Q×(K×V_{2 mesh})、Q×(K×V_{3 mesh screen})、Q×(K×V_{4 mesh})、Q×(K×V_{5 mesh screen})·····Q×(K×V_{N mesh})。

Furthermore, the method also comprises the step of updating the oil smoke attachment coefficient Q when the variable frequency range hood is used for sucking oil smoke every time, so that the accuracy of working condition identification is further improved. Specifically, the oil smoke adhesion coefficient Q obtained this time is stored to cover the last stored oil smoke adhesion coefficient Q, so as to ensure that the adopted oil smoke adhesion coefficient is a new oil smoke adhesion coefficient every time the oil smoke adhesion calibration is performed.

Further, the differential rotation speed Δ V_NIs the first actual rotating speed V_xThe calibration rotating speed V under each working condition obtained by the previous oil smoke adhesion calibration_{N calibration}The absolute value of the difference of (1), i.e. Δ V_N＝|V_x-V_{N calibration}|。

Further, the tolerance range is 100rpm to 200 rpm.

For example, the differential rotation speed Δ V in the 8 th operating mode₈Is the first actual rotating speed V_xAnd the calibration rotating speed V under the 8 th working condition_{N calibration}The absolute value of the difference of (1), i.e. Δ V₈＝|V_x-V_{8 calibration}|；

If Δ V₈Within the range of 100 rpm-200 rpm, namely delta V is less than or equal to 100rpm₈The rpm is less than or equal to 200, and then the motor is under the 8 th working condition; otherwise, the difference rotating speed delta V under other working conditions is judged_NWhether the speed is in the range of 100 rpm-200 rpm or not is judged until the working condition of the motor is determined.

In this embodiment, first, corresponding operating condition information is matched for each of N operating conditions of the motor; secondly, carrying out factory calibration on the variable frequency cigarette machine to obtain factory calibration rotating speed V under each working condition_{N is out}(ii) a Thirdly, detecting the first actual rotating speed V of the motor_x(ii) a Finally, the first actual rotating speed V is calculated₁The calibration rotating speed V under each working condition obtained by the previous oil smoke adhesion calibration_{N calibration}Comparing to obtain N different rotating speeds delta V_N(ii) a If a certain differential rotational speed DeltaV_NWithin the tolerance range, the motor is at the difference rotating speed delta V_NAnd operating according to the working condition information in the corresponding working condition.

Because the cigarette making machine is subjected to factory calibration on the factory leaving of the variable frequency cigarette making machine in the embodiment, the problem that a large deviation occurs in the working condition identification process due to individual difference of the variable frequency cigarette making machine is effectively avoided, and the accuracy of working condition identification is improved; also because in this embodiment the first actual rotational speed V of the motor is set_xObtaining the calibration rotating speed V under each working condition through the previous oil smoke adhesion calibration_{N calibration}Comparing and judging a certain differential rotation speed delta V_NWhether the oil smoke is in the tolerance range or not is judged according to the working condition, so that the problem that large deviation occurs in the working condition identification process due to oil smoke adhesion is effectively avoided, the accuracy of working condition identification is further improved, and the oil smoke detection method has the advantages thatThe problem of the operating mode discernment of present frequency conversion cigarette machine of effect is not accurate enough.

Example 2

The embodiment provides a working condition recognition device of a variable frequency range hood, which comprises a control unit 1, a current output unit 2 and a rotating speed detection unit 3, as shown in fig. 3;

a current output unit 2 electrically connected to the control unit 1 for inputting a target current I under a certain working condition to the motor_{N mesh}；

A rotation speed detection unit 3 electrically connected to the control unit 1 for detecting the current first actual rotation speed V of the motor_x；

The control unit 1 is used for matching corresponding working condition information for each of N working conditions of the motor, wherein the working condition information comprises a target current I_{N mesh}And a target rotational speed V_{N mesh}；

The control device is also used for controlling the starting or closing of the variable frequency range hood;

and is also used for converting the current first actual rotating speed V_xThe calibration rotating speed V under each working condition obtained by the previous oil smoke adhesion calibration_{N calibration}Comparing to obtain N different rotating speeds delta V_N(ii) a If a certain differential rotational speed DeltaV_NWithin the tolerance range, the motor is at the difference rotating speed delta V_NAnd operating according to the working condition information in the corresponding working condition.

Preferably, the control unit 1 may be a micro control unit, such as a single chip microcomputer; the rotation speed detection unit 3 may be a speed sensor; the current output unit 2 may be a current output control chip, such as an INA220AIDGSR or the like.

The working condition identification method of embodiment 1 is specifically described with reference to the working condition identification device of this embodiment, as shown in fig. 2:

s1, control unit 1 matches corresponding condition information for each of N (for example, 16) conditions of the motor, and the condition information comprises target current I_{N mesh}And a target rotational speed V_{N mesh}；

Target current I of N working conditions_{N mesh}Arranged in order from small to large to obtain I_{0 mesh}，I_{1 mesh screen}，I_{2 mesh}······I_{15 mesh}。

S21, the control unit 1 controls the current output unit 2 to output the target current I to the motor under the working condition of 0_{0 mesh}Target current I of motor under 0 working condition_{0 mesh}Running; the rotating speed detecting unit 3 obtains a third actual rotating speed V of the motor_zThe control unit 1 determines the factory difference coefficient K as V_z/V_{0 mesh}And obtaining the factory difference coefficient K.

S22, the control unit 1 calibrates the rotating speed V according to each working condition_{N is out}The difference coefficient K of leaving factory and the target rotating speed V under corresponding working conditions_{N mesh}The product of the two is obtained to obtain the factory calibration rotating speed V_{N is out}E.g. factory calibrated speed V corresponding to N operating modes_{N is out}Respectively as follows: KxV_{0 mesh}、K×V_{1 mesh screen}、K×V_{2 mesh}、K×V_{3 mesh screen}、K×V_{4 mesh}······K×V_{15 mesh}。

S3, the control unit 1 controls the variable frequency range hood to start, and the rotating speed detection unit 3 detects the first actual rotating speed V of the motor_x。

The control unit 1 obtains the calibration rotating speed V under each working condition obtained by the previous oil smoke adhesion calibration_{N calibration}；

Calibration rotating speed V in each previous working condition_{N calibration}Obtained by the following method:

when the former variable frequency range hood is in operation, the control unit 1 recognizes that the motor is under the working condition 8, and at the moment, the control unit 1 controls the current output unit 2 to maintain the input I to the electricity_{8 mesh}While the rotation speed detecting unit 3 detects that the motor is operated at I_{8 mesh}Second actual rotational speed V at the time of current operation_y；

The control unit 1 takes the oil smoke adhesion coefficient Q as a second actual rotating speed V_yFactory calibration rotating speed V under the working condition_{N is out}The ratio of (A) to (B) is obtained to obtain the oil fume adhesion coefficient Q ═ V of the current time_y/V_{8 out}＝V_y/(K×V_{8 mesh})；

The control unit 1 then calibrates the rotational speed V according to each operating mode_{N calibration}Is oilSmoke adhesion coefficient Q and factory calibration rotating speed V under corresponding working conditions_{N is out}The product of the two is obtained to obtain the calibration rotating speed V under each working condition after the oil smoke adhesion calibration_{N calibration}Respectively is as follows: q × (K × V)_{0 mesh})、Q×(K×V_{1 mesh screen})、Q×(K×V_{2 mesh})、Q×(K×V_{3 mesh screen})、Q×(K×V_{4 mesh})、Q×(K×V_{5 mesh screen})·····Q×(K×V_{15 mesh})；

The frequency conversion smoke machine can adjust the calibration rotating speed V of each working condition obtained by the oil smoke adhesion calibration in the last time in the next operation_{N calibration}To be compared this time.

S4, converting the first actual rotating speed V of the variable frequency range hood at this time_xThe calibration rotating speed V under each working condition obtained by the previous oil smoke adhesion calibration_{N calibration}Comparing to obtain N different rotating speeds delta V_N(ii) a If a certain differential rotational speed DeltaV_NWithin the tolerance range, the motor is at the difference rotating speed delta V_NAnd operating according to the working condition information in the corresponding working condition.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the described parent features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (12)

1. A working condition identification method of a variable frequency range hood is characterized by comprising the following steps:

matching corresponding working condition information for each of N working conditions of the motor, wherein the working condition information comprises a target current I_{N mesh}And a target rotational speed V_{N mesh}；

Starting the variable frequency range hood, detecting the first actual rotating speed V of the motor_x；

The first actual rotating speed V of this time_xThe calibration rotating speed V under each working condition obtained by the previous oil smoke adhesion calibration_{N calibration}Comparing to obtain N different rotating speeds delta V_N(ii) a If a certain differential rotational speed DeltaV_NWithin the tolerance range, the motor is at the difference rotating speed delta V_NAnd operating according to the working condition information in the corresponding working condition.

2. The method for identifying the working condition of the variable-frequency cigarette making machine according to claim 1, characterized by further comprising the following steps of:

when the variable frequency cigarette machine leaves the factory, the variable frequency cigarette machine is subjected to factory calibration to obtain factory calibration rotating speed V under each working condition_{N is out}。

3. The method for identifying the working condition of the variable-frequency cigarette making machine according to claim 2, wherein the oil smoke attachment calibration comprises the following steps:

target current I of motor under working condition_{N mesh}Operating to obtain the second actual rotating speed V of the motor_yAccording to the second actual speed V_yAnd the frequency conversion smoke machine leaves the factory and calibrates the rotational speed V under this kind of operating mode_{N is out}Obtaining the oil smoke attachment coefficient Q;

obtaining the calibration rotating speed V under each working condition according to the oil smoke adhesion coefficient Q_{N calibration}。

4. The method for identifying the working condition of a variable-frequency cigarette making machine according to claim 3, wherein the working condition is identified according to a second actual rotating speed V_yAnd the frequency conversion smoke machine leaves the factory and calibrates the rotational speed V under this kind of operating mode_{N is out}Obtaining an oil smoke adhesion coefficient Q, which is specifically as follows:

the oil fume attachment coefficient Q is the second actual rotating speed V_yFactory calibration rotating speed V under the working condition_{N is out}The ratio of (a) to (b).

5. The method for identifying the working condition of the variable-frequency cigarette making machine according to claim 3, wherein the calibration rotating speed V under each working condition is obtained according to the oil smoke attachment coefficient Q_{N calibration}The method specifically comprises the following steps:

calibration rotating speed V under each working condition_{N calibration}Calibrating the rotation speed V for oil smoke attachment coefficient Q and leaving factory under corresponding working conditions_{N is out}The product of (a).

6. The method for identifying the working condition of the variable-frequency cigarette making machine according to claim 2, wherein the concrete step of factory calibration of the variable-frequency cigarette making machine comprises the following steps:

target current I of motor under certain working condition_{N mesh}Operating to obtain the third actual rotating speed V of the motor_zAccording to the third actual speed V_zAnd target rotational speed V under the condition_{N mesh}Determining a factory difference coefficient K;

obtaining the factory calibration rotating speed V under each working condition through the factory difference coefficient K_{N is out}。

7. The method for identifying the working condition of the variable-frequency cigarette making machine according to claim 6, wherein the working condition is identified according to a third actual rotating speed V_zAnd target rotational speed V under the condition_{N mesh}Determining a factory difference coefficient K, specifically:

the difference coefficient K of leaving factory is the third actual rotating speed V_zTarget rotating speed V under the working condition_{N mesh}The ratio of (a) to (b).

8. The working condition identification method of the variable-frequency cigarette making machine according to claim 6, characterized in that the factory calibration rotating speed V under each working condition is obtained through a factory difference coefficient K_{N is out}The method specifically comprises the following steps:

factory calibration rotating speed V under each working condition_{N is out}The difference coefficient K of leaving factory and the target rotating speed V under corresponding working conditions_{N mesh}The product of (a).

9. The method for identifying operating conditions of a variable-frequency range hood according to any one of claims 1 to 8, wherein the differential rotation speed Δ V_NIs the first actual rotating speed V_xThe calibration rotating speed V under each working condition obtained by the previous oil smoke adhesion calibration_{N calibration}The absolute value of the difference of (a).

10. The method for identifying the working condition of the variable-frequency cigarette making machine according to any one of claims 1 to 8, wherein the tolerance range is 100rpm to 200 rpm.

11. The method for identifying the working condition of the variable-frequency cigarette making machine according to any one of claims 1 to 8, characterized by further comprising the following steps of: target current I of N working conditions_{N mesh}And (6) sorting.

12. The working condition recognition device of the variable frequency range hood is characterized by comprising a control unit (1), a current output unit (2) and a rotating speed detection unit (3);

a current output unit (2) electrically connected with the control unit (1) and used for inputting a target current I under a certain working condition to the motor_{N mesh}；

A rotating speed detection unit (3) electrically connected with the control unit (1) and used for detecting the current first actual rotating speed V of the motor_x；

A control unit (1) for matching for each of N operating conditions of the motor a corresponding operating condition information comprising a target current I_{N mesh}And a target rotational speed V_{N mesh}；

The control device is used for controlling the starting or closing of the variable frequency range hood;

and is also used for converting the current first actual rotating speed V_xThe calibration rotating speed V under each working condition obtained by the previous oil smoke adhesion calibration_{N calibration}Making comparison to obtain N different rotating speeds△V_N(ii) a If a certain differential rotational speed DeltaV_NWithin the tolerance range, the motor is at the difference rotating speed delta V_NAnd operating according to the working condition information in the corresponding working condition.

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