CN115111693B - Method for detecting service life of efficient filter and clean workbench - Google Patents

Method for detecting service life of efficient filter and clean workbench Download PDF

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CN115111693B
CN115111693B CN202210617120.0A CN202210617120A CN115111693B CN 115111693 B CN115111693 B CN 115111693B CN 202210617120 A CN202210617120 A CN 202210617120A CN 115111693 B CN115111693 B CN 115111693B
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voltage value
preset condition
value
wind speed
preset
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CN115111693A (en
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秦睿超
孟亮亮
胡凯
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Zhongke Meiling Cryogenics Co Ltd
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Zhongke Meiling Cryogenics Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
    • 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/39—Monitoring filter performance
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28—Arrangement or mounting of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/30—Velocity
    • 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)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Fluid Mechanics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The invention provides a method for detecting the service life of a high-efficiency filter and a clean workbench, and relates to the technical field of air purification, wherein the method for detecting the service life of the high-efficiency filter comprises the following steps: acquiring an initial voltage value, a first voltage value and a maximum voltage value of a fan motor; judging whether the first voltage value, the initial voltage value and the maximum voltage value meet a first preset condition or not; and if the first preset condition is met, acquiring the residual service life of the high-efficiency filter according to the first preset condition. Compared with the existing method for detecting the pressure difference at two ends of the high-efficiency filter by adopting the pressure difference sensor to detect the service life of the high-efficiency filter, the invention can omit the structures of the pressure difference sensor, the joint, the air pipe and the like on the existing clean workbench, thereby not only reducing the cost of the clean workbench, but also simplifying the structure of the clean workbench.

Description

Method for detecting service life of efficient filter and clean workbench
Technical Field
The invention relates to the technical field of air purification, in particular to a method for detecting the service life of an efficient filter and a clean workbench.
Background
The clean bench is an air purification device for medical institutions, which can provide local operation environments with a clean grade of ISO grade 5 (grade 100) or higher, and the high-efficiency filter is a key part of the air purification device and needs to be replaced regularly, so that the service life of the high-efficiency filter needs to be prolonged at any time to remind users of timely replacement.
At present, a method for detecting the pressure difference at two ends of the efficient filter by using the pressure difference sensor is generally adopted to detect the service life of the efficient filter, and the clean workbench structure for detecting the service life of the efficient filter by using the method not only needs to install the pressure difference sensor with relatively high price, but also needs to be communicated with a low-pressure area and a high-pressure area by adopting consumable materials such as a connector, an air pipe and the like, so that the structure of the clean workbench is relatively complex and the cost is relatively high.
Disclosure of Invention
The invention solves the problem of simplifying the structure of the clean workbench and reducing the cost while being convenient for detecting the service life of the high-efficiency filter.
In order to solve the above problems, the present invention provides a method for detecting the service life of a high-efficiency filter, comprising:
acquiring an initial voltage value, a first voltage value and a maximum voltage value of a fan motor;
judging whether the first voltage value, the initial voltage value and the maximum voltage value meet a first preset condition or not;
and if the first preset condition is met, acquiring the residual service life of the high-efficiency filter according to the first preset condition.
Further, the acquiring the initial voltage value of the fan motor includes:
judging whether the high-efficiency filter is electrified for the first time or just replaced;
if yes, acquiring a preset wind speed value and a first wind speed value of the fan motor, and judging whether the preset wind speed value and the first wind speed value meet a second preset condition or not, wherein the second preset condition comprises: q (Q) v1 ＝Q v0 ±Δ v Wherein Q is v1 For the first wind speed value, Q v0 For the preset wind speed value, delta v Is an interval value;
and if the second preset condition is met, acquiring the initial voltage value of the fan motor.
Further, if the preset wind speed value and the first wind speed value do not meet the second preset condition, judging whether the preset wind speed value and the first wind speed value meet a third preset condition, wherein the third preset condition comprises: q (Q) v1 ＜Q v0 -Δ v 。
Further, if the preset wind speed value and the first wind speed value meet the third preset condition, the first voltage value is increased by a preset value.
Further, if the preset wind speed value and the first wind speed value do not meet the third preset condition, the first voltage value is reduced by one preset value.
Further, the determining whether the first voltage value, the initial voltage value, and the maximum voltage value meet the first preset condition includes:
Figure BDA0003674820510000021
wherein U is 0 For the initial voltage value, U max For the maximum voltage value, U 1 For the first voltage value, n is the number of equally divided intervals between the initial voltage value and the maximum voltage value.
Further, the obtaining the remaining life of the high-efficiency filter according to the first preset condition includes:
if the first preset condition is met, acquiring the residual service life of the high-efficiency filter as follows
Figure BDA0003674820510000031
Further, after the obtaining the initial voltage value, the first voltage value, and the maximum voltage value of the fan motor, before the judging whether the first voltage value, the initial voltage value, and the maximum voltage value meet the first preset condition, the method further includes:
judging whether the first voltage value is smaller than the maximum voltage value;
if yes, judging whether the preset wind speed value and the first wind speed value meet a second preset condition or not, wherein the second preset condition comprises: q (Q) v1 ＝Q v0 ±Δ v Wherein Q is v1 For the first wind speed value, Q v0 For the preset wind speed value, delta v Is an interval value;
if not, the remaining life of the high-efficiency filter is acquired to be zero.
Further, the determining whether the preset wind speed value and the first wind speed value meet the second preset condition further includes:
if the second preset condition is met, judging whether the first voltage value, the initial voltage value and the maximum voltage value meet the first preset condition;
if the second preset condition is not met, judging whether the preset wind speed value and the first wind speed value meet a third preset condition or not, wherein the third preset condition comprises: q (Q) v1 ＜Q v0 -Δ v 。
Further, after the determining whether the first voltage value, the initial voltage value, and the maximum voltage value meet the first preset condition, the method further includes:
if the first preset condition is not met, judging whether the first voltage value, the initial voltage value and the maximum voltage value meet a fourth preset condition or not, wherein the fourth preset condition comprises:
Figure BDA0003674820510000032
wherein U is 0 For the initial voltage value, U max For the maximum voltage value, U 1 N is the number of equal division intervals between the initial voltage value and the maximum voltage value, m is the number of cyclic operations, and n is more than or equal to m+1;
if the fourth preset condition is met, acquiring the residual life of the high-efficiency filter as
Figure BDA0003674820510000041
And if the fourth preset condition is not met, repeating the circulating operation until the residual service life of the high-efficiency filter is zero.
Compared with the prior art, the invention has the following beneficial effects:
only the first preset condition is set in the controller of the existing clean workbench, the initial voltage value, the first voltage value and the maximum voltage value of the fan motor are collected through the controller, and whether the first voltage value, the initial voltage value and the maximum voltage value meet the first preset condition is judged, so that the residual service life of the efficient filter can be obtained according to the first preset condition.
Another object of the present invention is to provide a clean bench, which can simplify the structure of the clean bench and reduce the cost while facilitating the detection of the service life of the high-efficiency filter.
In order to solve the problems, the technical scheme of the invention is realized as follows:
the utility model provides a clean bench adopts the detection method of high-efficient filter life to detect its high-efficient filter life, includes fan motor, high-efficient filter, breeze speed sensor and controller, fan motor high-efficient filter with breeze speed sensor respectively with the controller electricity is connected, fan motor with breeze speed sensor sets up respectively along the air current direction in the both sides that high-efficient filter is relative, the controller is used for carrying out high-efficient filter life's detection method.
The advantages of the clean bench over the prior art are the same as the method for detecting the service life of the high-efficiency filter, and are not described in detail herein.
Drawings
FIG. 1 is a flow chart of a method for detecting the service life of an efficient filter according to an embodiment of the invention;
FIG. 2 is a sub-flowchart of S100 in an embodiment of the invention;
FIG. 3 is a flow chart of a method for detecting the service life of an efficient filter according to another embodiment of the invention;
FIG. 4 is a sub-flowchart of S200 in another embodiment of the invention;
FIG. 5 is a sub-flowchart of S500 in accordance with another embodiment of the present invention;
FIG. 6 is a schematic diagram of a method for detecting the service life of a high-efficiency filter according to an embodiment of the present invention;
FIG. 7 is a schematic view of a clean bench according to an embodiment of the invention;
FIG. 8 is a cross-sectional view taken along the direction A-A in FIG. 7 in accordance with an embodiment of the present invention.
Reference numerals illustrate:
1. a fan motor; 2. a high-efficiency filter; 3. a micro wind speed sensor; 4. a controller; 5. a table body; 6. a rack.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the description of the present invention, it should be understood that the forward direction of "X" in the drawings represents the left direction, and correspondingly, the reverse direction of "X" represents the right direction; the forward direction of "Y" represents the forward direction, and correspondingly, the reverse direction of "Y" represents the rearward direction; the forward direction of "Z" represents above, and correspondingly, the reverse direction of "Z" represents below, and the azimuth or positional relationship indicated by the terms "X", "Y", "Z", etc. are based on the azimuth or positional relationship shown in the drawings of the specification, are merely for convenience of description and to simplify the description, and do not indicate or imply that the device or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the invention.
The terms "first," "second," "third," and "fourth," etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
A clean bench for medical institution adopts motor fan to blow the high-pressure region of air from high-efficient filter top to the low-pressure work area of its below generally, and in this process, high-efficient filter filters the impurity in the air for get into the air in low-pressure work area cleaner, satisfy medical clean grade requirement. In order to ensure the cleanliness of the air entering the low-pressure working area, the service life of the high-efficiency filter needs to be detected in real time so as to be replaced in time.
The existing clean workbench usually adopts a mode of installing a differential pressure sensor to detect the service life of the high-efficiency filter, and consumables such as an air pipe, a connector and the like are required to be installed in the equipment to extend into a high-pressure area and a low-pressure area and are respectively communicated with the differential pressure sensor, the service life of the high-efficiency filter is judged through the differential pressure of the high-pressure area and the low-pressure area, so that the manufacturing cost is high, the internal structure of the equipment is more complex, the installation and the disassembly are more troublesome, and the maintenance is inconvenient.
Therefore, the detection method for the service life of the efficient filter is required to be changed, so that the structure of the existing clean workbench is simplified, the cost is reduced, and the effects of convenient installation and disassembly are achieved.
Referring to fig. 1, an embodiment of the present invention provides a method for detecting a service life of a high-efficiency filter, including:
s100, acquiring an initial voltage value, a first voltage value and a maximum voltage value of the fan motor 1;
in this embodiment, when the life of the high-efficiency filter 2 is 100%, the initial voltage value is an average voltage of the high-efficiency filter 2 in a period of time when the fan motor 1 runs stably, and the first voltage value is an average voltage of the high-efficiency filter 2 in any life of the high-efficiency filter 2 in a period of time when the fan motor 1 runs stably, and both the initial voltage value and the first voltage value can be normally started up when the power supply of the clean bench is turned on, and the fan motor 1 is obtained by the control board after running stably.
The maximum voltage value may be the rated voltage of the fan motor 1 or the local voltage thereof, for example, the rated voltage of the fan motor 1 of a certain model is 100V, the actual voltage is 220V, the maximum voltage of the fan motor 1 can only reach 100V through the internal protection of the fan motor 1, the maximum voltage value is 100V in this case, if the rated voltage of the fan motor 1 is 300V, and the laboratory of the medical institution can only provide 220V in this case, the maximum voltage value is 220V, and the maximum voltage value can be obtained by the control board according to the actual situation.
When the control board sends a signal to control the fan motor 1 to work at the maximum voltage value, the running load of the fan motor 1 reaches the maximum, which means that the high-efficiency filter 2 has reached the state that the service life is zero at this time, and the high-efficiency filter 2 needs to be replaced.
S300, judging whether the first voltage value, the initial voltage value and the maximum voltage value meet a first preset condition;
specifically, in this embodiment, the control board is provided with the operation logic in advance, and after the control board obtains the first voltage value, the initial voltage value and the maximum voltage value, the control board compares the relationship between the first voltage value and the initial voltage value and the relationship between the first voltage value and the maximum voltage value, and then determines whether the first preset condition is satisfied between the first voltage value, the initial voltage value and the maximum voltage value.
And S400, if the first preset condition is met, acquiring the residual service life of the high-efficiency filter 2 according to the first preset condition.
Specifically, in this embodiment, if the control board determines that the first preset condition is satisfied among the first voltage value, the initial voltage value, and the maximum voltage value, the control board obtains the remaining life percentage of the high-efficiency filter 2 according to the arithmetic logic of the first preset condition, and displays the remaining life percentage through the display unit.
It should be noted that, the closer the first voltage value is to the initial voltage value, the closer the load of the fan motor 1 is to the load when the service life of the high-efficiency filter is 100%, the smaller the resistance of the air penetrating through the high-efficiency filter 2 is, and the higher the service life percentage of the high-efficiency filter 2 is, conversely, the closer the first voltage value is to the maximum voltage value, the closer the load of the fan motor 1 is to the load when the service life of the high-efficiency filter is zero, the larger the resistance of the air penetrating through the high-efficiency filter 2 is, and the lower the service life percentage of the high-efficiency filter 2 is.
Therefore, only the first preset condition is set in the controller 4 of the existing clean bench, the initial voltage value, the first voltage value and the maximum voltage value of the fan motor 1 are collected through the controller 4, and whether the first voltage value, the initial voltage value and the maximum voltage value meet the first preset condition is judged, so that the residual service life of the efficient filter 2 can be obtained according to the first preset condition, and compared with the existing method for detecting the differential pressure at two ends of the efficient filter 2 by adopting the differential pressure sensor, the service life of the efficient filter 2 can be detected, the structures such as the differential pressure sensor, the connector and the air pipe on the existing clean bench can be omitted, the cost of the clean bench can be reduced, and the structure of the clean bench can be simplified.
Further, as shown in fig. 2, the step S100 of obtaining the initial voltage value of the fan motor 1 includes:
s110, judging whether the high-efficiency filter 2 is electrified for the first time or just replaced;
s120, if yes, acquiring a preset wind speed value and a first wind speed value of the fan motor 1, and judging whether the preset wind speed value and the first wind speed value meet a second preset condition;
and S130, if the second preset condition is met, acquiring an initial voltage value of the fan motor 1.
Specifically, in this embodiment, after the power of the clean bench is turned on and the clean bench is turned on normally, the control board sends out an electrical signal and provides a preset voltage to the fan motor 1 for operation, at this time, the wind pressure above the high-efficiency filter 2 increases, air is sent to the working area where the low-pressure breeze speed sensor 3 is located through the high-efficiency filter 2, and the control board determines whether the machine state is first powered on or the high-efficiency filter 2 is just replaced. If yes, the control board collects a first wind speed value of the micro wind speed sensor 3, the control board judges whether a second preset condition is met between the first wind speed value and a preset wind speed value, and if yes, the control board records the voltage value of the fan motor 1 at the moment as an initial voltage value.
The preset wind speed value is the working area wind speed required by the medical equipment, and is commonly called as the product claiming wind speed, for example, the working area wind speed under the claiming rated power of the medical equipment of a certain model is 0.32m/s, then the preset wind speed value of the product is 0.32m/s, and the preset wind speed value can be directly input by manpower or stored in a storage medium of the medical equipment in advance and read by a control board.
In the process of determining whether the high-efficiency filter 2 is first energized or has just been replaced, the control board may record the number of pulses of the high-efficiency filter 2 being energized, and determine whether the high-efficiency filter 2 is first energized by determining whether the number of pulses is 1.
In addition, the service life of the high-efficiency filter 2 can send an alarm prompt when the service life of the high-efficiency filter 2 is up, at this time, a user needs to replace the high-efficiency filter 2, clicks a screen button of the control board to remove the alarm prompt, and simultaneously can give a signal to the control board to judge that the user just replaces the high-efficiency filter 2 when the alarm prompt is removed, if the user forgets to click the button, the control board can also judge whether the high-efficiency filter 2 is replaced by judging whether the working voltage of the fan motor 1 has larger fluctuation when the wind speed reaches the requirement of the preset wind speed after the user is electrified twice.
For example, when the service life of the high-efficiency filter 2 is close to zero, the operating voltage of the fan motor 1 is 220V when the wind speed reaches the requirement of the preset wind speed, and when the wind speed reaches the requirement of the preset wind speed after the high-efficiency filter 2 is replaced and electrified, the operating voltage of the fan motor 1 is 130V, it can be determined that the operating voltage of the fan motor 1 fluctuates greatly after the two times of electrification, thereby determining that the high-efficiency filter 2 is replaced.
Therefore, since the low-pressure working area of the existing clean bench needs a stable breeze speed environment, the low-pressure working area is usually provided with the breeze speed sensor 3 so as to detect the wind speed in real time, the detection method can obtain the initial voltage value of the fan motor 1 only by utilizing the existing structure, provide necessary parameters for the control panel to subsequently obtain the residual life of the high-efficiency filter 2, and compared with the existing method for detecting the differential pressure at two ends of the high-efficiency filter 2 by adopting the differential pressure sensor to detect the service life of the high-efficiency filter 2, the method can omit the structures such as the differential pressure sensor, the connector, the air pipe and the like on the existing clean bench, not only can reduce the cost of the clean bench, but also can simplify the structure of the clean bench.
Further, as shown in fig. 2, in S120, the first wind speed value is an average wind speed of the fan motor 1 in the first time, and in S130, the initial voltage value is an average voltage of the fan motor 1 in the first time.
It should be noted that, in this embodiment, the first time does not refer to a specific time, but should be understood as a time period, the value of which can be selected according to needs, and typically ranges from 2s to 10s, for example, the first time may take values of 2s, 3s, 4s, 5s, 6s, 7s, 8s, 9s or 10s, where the shorter the first time, the lower the precision of the first wind speed value and the initial voltage value, the lower the precision of the remaining life percentage of the high efficiency filter 2, but the stronger the real-time performance; the longer the first time, the more accurate the first wind speed value and the initial voltage value, the higher the accuracy of the remaining life percentage of the high efficiency filter 2, but the worse the real-time.
It should be noted that, the first time required for acquiring the first wind speed value and the first time required for acquiring the initial voltage value may be the same duration, or may be different durations, and may be specifically set as required.
Preferably, in this embodiment, the first time required for acquiring the first wind speed value and the first time required for acquiring the initial voltage value may be the same duration, so that the first wind speed value and the initial voltage value may be acquired simultaneously in the same duration period, that is, after the first wind speed value and the preset wind speed value are determined to meet the second preset condition, the acquired voltage value may be immediately determined to be the initial voltage value, and the next first duration is not required to be waited, so that the detection accuracy is ensured, and meanwhile, the detection time may be saved.
Further, in S120, it is determined whether the preset wind speed value and the first wind speed value satisfy a second preset condition, where the second preset condition includes: q (Q) v1 ＝Q v0 ±Δ v Wherein Q is v1 For the first wind speed value, Q v0 For a preset wind speed value, delta v Is an interval value.
Specifically, in the present embodiment, when Q v1 ＝Q v0 ±Δ v When the first wind speed value is equal to the preset wind speed value plus or minus one interval value, the preset wind speed value and the first wind speed value can be judged to meet the second preset condition, at this time, S can be executed130, acquiring an initial voltage value of the fan motor 1; when Q is v1 ≠Q v0 ±Δ v When the first wind speed value is not equal to the preset wind speed value plus or minus one interval value, it may be determined that the preset wind speed value and the first wind speed value do not meet the second preset condition, and at this time, the subsequent operation of S120 may be performed.
Wherein the interval value delta v The value of (2) may be selected according to the need, and is usually in the range of 0-0.05m/s, for example, the interval value may be a value of 0.01m/s, 0.02m/s, 0.03m/s, 0.04m/s or 0.05m/s, etc., which is not limited herein.
The interval value Δ is v The smaller the value of the first wind speed value and the initial voltage value are, the higher the accuracy of the obtained first wind speed value and the initial voltage value is, the higher the accuracy of the residual life percentage of the high-efficiency filter 2 is, but the larger the misjudgment probability is, and the lower the detection efficiency is; interval value delta v The greater the value of (2), the lower the accuracy of the first wind speed value and the initial voltage value is, the lower the accuracy of the remaining life percentage of the high-efficiency filter is, but the lower the erroneous judgment probability is, the higher the detection efficiency is.
Therefore, by setting the preset wind speed value to be a section value and comparing the section value with the first wind speed value, repeated cyclic detection caused by small errors between the first wind speed value and the preset wind speed value can be avoided, so that the first voltage value cannot be acquired later and subsequent detection cannot be performed, and the detection efficiency can be improved while the detection quality is ensured.
Further, as shown in fig. 2, the step S120 of obtaining the initial voltage value of the fan motor 1 further includes:
s121, if the preset wind speed value and the first wind speed value do not meet the second preset condition, judging whether the preset wind speed value and the first wind speed value meet a third preset condition, wherein the third preset condition comprises: q (Q) v1 ＜Q v0 -Δ v 。
The interval value in the third preset condition and the interval value in the second preset condition are the same interval value.
Thus, by setting the preset wind speed value Q v0 And interval value delta v Is different from the first wind speedValue Q v1 By comparing, the first wind speed value can be judged to be too high or too low, and a basis is provided for the subsequent adjustment of the working voltage of the fan motor 1.
Further, referring to fig. 2, S120 further includes S122 and S123, where if the preset wind speed value and the first wind speed value meet a third preset condition, the first voltage value is increased by a preset value; s122, if the preset wind speed value and the first wind speed value do not meet the third preset condition, the first voltage value is reduced by one preset value.
The preset value can be directly input manually and read by the control board when the third preset condition is met, the value can be selected according to the requirement, and the range of the preset value is usually 2-10V, for example, the preset value can be 2V, 3V, 4V, 5V, 6V, 7V, 8V, 9V or 10V.
The smaller the preset value is, the higher the accuracy of the first wind speed value and the initial voltage value is, the higher the accuracy of the remaining life percentage of the high-efficiency filter 2 is, but the longer the time required for the fan motor 1 to reach the stable operation is, the worse the real-time performance is; the greater the preset value, the lower the accuracy of the first wind speed value and the initial voltage value, the lower the accuracy of the remaining life percentage of the high efficiency filter 2, but the shorter the time required for the fan motor 1 to reach the stable operation, the stronger the real-time.
In this way, by increasing the first voltage value by a preset value or decreasing the first voltage value by a preset value, the fan motor 1 can be quickly adjusted to a stable running state meeting the second preset condition, so that subsequent operation is facilitated.
Further, in step S300, it is determined whether the first voltage value, the initial voltage value, and the maximum voltage value satisfy a first preset condition, where the first preset condition includes:
Figure BDA0003674820510000121
wherein U is 0 For initial voltage value, U max At maximum voltage value, U 1 N is the number of equal intervals between the initial voltage value and the maximum voltage value; the obtaining of the remaining life of the high efficiency filter 2 according to the first preset condition in S400 includes: if satisfy the firstA preset condition is given that the remaining life of the high-efficiency filter 2 is +.>
Figure BDA0003674820510000122
In the present embodiment, the value of n depends on the initial voltage value U 0 To maximum voltage U max The more the intervals are divided, the larger the n value is, the smaller the remaining life display interval of the high efficiency filter 2 is, and the more accurate the display is.
If the first voltage value U 1 Within the above section due to the above
Figure BDA0003674820510000131
Wherein the greater the value of n, the greater the +.>
Figure BDA0003674820510000132
And U 0 The closer the first voltage value U is, the description 1 And an initial voltage value U 0 The closer, that is to say the greater the percentage of remaining life of the high-efficiency filter 2, the correspondingly smaller the value of n, +.>
Figure BDA0003674820510000133
And U 0 The larger the interval of (a) is, the first voltage value U is described 1 And maximum voltage value U max The closer, that is, the smaller the percentage of remaining life of the high efficiency filter 2.
Further, as shown in fig. 3 and 4, after the initial voltage value, the first voltage value, and the maximum voltage value of the fan motor 1 are obtained in S100, before determining whether the first voltage value, the initial voltage value, and the maximum voltage value satisfy the first preset condition in S300, the method further includes:
s200, judging whether the first voltage value is smaller than the maximum voltage value;
s210, if so, judging whether the preset wind speed value and the first wind speed value meet a second preset condition, wherein the second preset condition comprises: q (Q) v1 ＝Q v0 ±Δ v Wherein Q is v1 For the first wind speed value, Q v0 For the value of the wind speed to be preset,Δ v is an interval value;
if not, S220 is obtained, and the remaining lifetime of the high efficiency filter 2 is zero.
Further, as shown in fig. 4, in S210, determining whether the preset wind speed value and the first wind speed value meet the second preset condition further includes:
s211, if the second preset condition is met, judging whether the first voltage value, the initial voltage value and the maximum voltage value meet the first preset condition;
s212, if the second preset condition is not met, judging whether the preset wind speed value and the first wind speed value meet a third preset condition or not, wherein the third preset condition comprises: q (Q) v1 ＜Q v0 -Δ v 。
In this embodiment, if the control board determines that the first voltage value is equal to or exceeds the maximum voltage value, it indicates that the fan motor 1 is in the critical operation state or in the overload operation state, and at this time, the resistance of the high efficiency filter 2 has reached the maximum, that is, the service life of the high efficiency filter 2 has reached the limit, and needs to be replaced.
If the control board determines that the first voltage value is smaller than the maximum voltage value, the breeze speed sensor 3 again obtains the first wind speed value, and determines whether the preset wind speed value and the first wind speed value meet the second preset condition, and the specific process is as described above and will not be repeated here.
It should be noted that, before determining whether the first voltage value, the initial voltage value and the maximum voltage value meet the first preset condition in S300, setting S200 to determine whether the first voltage value is smaller than the maximum voltage value can avoid the occurrence of missed judgment or erroneous judgment due to the fact that the first voltage value, the initial voltage value and the maximum voltage value are not within the range of the first preset condition, so that the service life detection of the high-efficiency filter 2 is more accurate and comprehensive.
In addition, by judging whether the preset wind speed value and the first wind speed value meet the second preset condition again, misjudgment or misjudgment caused by the fact that the real-time wind speed or the real-time voltage is unstable in stages can be avoided, and therefore the service life of the efficient filter 2 is detected more accurately.
Further, as shown in fig. 5, after S300, the method for detecting the service life of the high-efficiency filter further includes:
s500, if the first preset condition is not met, judging whether the first voltage value, the initial voltage value and the maximum voltage value meet a fourth preset condition, wherein the fourth preset condition comprises:
Figure BDA0003674820510000141
wherein U is 0 For initial voltage value, U max At maximum voltage value, U 1 N is the number of equal intervals between the initial voltage value and the maximum voltage value, m is the number of cyclic operations, and n is more than or equal to m+1;
s510, if the fourth preset condition is satisfied, acquiring the remaining life of the high-efficiency filter 2 as
Figure BDA0003674820510000142
And S520, if the fourth preset condition is not met, repeating the circulating operation until the residual service life of the high-efficiency filter 2 is zero.
Exemplary, after S300, if the first voltage value U 1 Not belonging to the interval
Figure BDA0003674820510000151
Figure BDA0003674820510000152
Then judge the first voltage value U 1 Whether or not it belongs to the section->
Figure BDA0003674820510000153
If yes, the remaining life of the high-efficiency filter 2 is obtained as +.>
Figure BDA0003674820510000154
n is greater than or equal to 2.
And so on, if the first voltage value U 1 Not belonging to the interval
Figure BDA0003674820510000155
Then judge the first voltage value U 1 Whether or not it belongs to the section->
Figure BDA0003674820510000156
If yes, the remaining life of the high-efficiency filter 2 is obtained as
Figure BDA0003674820510000157
n is greater than or equal to 3.
If the first voltage value U 1 Not belonging to the interval
Figure BDA0003674820510000158
Then judge the first voltage value U 1 Whether or not it belongs to the section->
Figure BDA0003674820510000159
If yes, the remaining life of the high-efficiency filter 2 is obtained as +.>
Figure BDA00036748205100001510
n is greater than or equal to 4;
if not, then so on until the remaining life of the high efficiency filter 2 is zero.
In this way, through repeated cyclic operation, the occurrence of missed judgment or erroneous judgment due to the fact that the first voltage value, the initial voltage value and the maximum voltage value are not in a certain specific interval range can be avoided, so that the service life detection of the high-efficiency filter 2 is more accurate and comprehensive.
Another embodiment of the present invention provides a clean bench, which adopts the method for detecting the service life of the high-efficiency filter 2 as described above, and includes a fan motor 1, the high-efficiency filter 2, a breeze speed sensor 3 and a controller 4, where the fan motor 1, the high-efficiency filter 2 and the breeze speed sensor 3 are respectively electrically connected with the controller 4, the fan motor 1 and the breeze speed sensor 3 are respectively disposed on two opposite sides of the high-efficiency filter 2 along the airflow direction, and the controller 4 is used for executing the method for detecting the service life of the high-efficiency filter.
Referring to fig. 7 and 8, in this embodiment, the clean bench includes a bench 6 and a bench body 5, the bench body 5 is disposed in the middle of the bench 6, a region located above the bench body 5 on the bench 6 is a box-type working area of the clean bench, a high-efficiency filter 2 is disposed at a top position of the box-type working area on the bench 6, a fan motor 1 is disposed at a position above the high-efficiency filter 2 on the bench 6, a micro wind speed sensor 3 is disposed at a position below the high-efficiency filter 2 on the bench 6, the micro wind speed sensor 3 is used for detecting a wind speed of the box-type working area, a controller 4 is disposed at a front side of the high-efficiency filter 2 on the bench 6, and the controller 4 is electrically connected with the controller by using a control board, wherein the fan motor 1, the high-efficiency filter 2 and the micro wind speed sensor 3 are electrically connected with the control board respectively.
Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the invention.

Claims (9)

1. The method for detecting the service life of the efficient filter is characterized by comprising the following steps of:
acquiring an initial voltage value, a first voltage value and a maximum voltage value of a fan motor (1);
judging whether the first voltage value, the initial voltage value and the maximum voltage value meet a first preset condition or not;
if the first preset condition is met, acquiring the residual service life of the efficient filter (2) according to the first preset condition;
the obtaining the initial voltage value of the fan motor (1) comprises:
judging whether the high-efficiency filter (2) is electrified for the first time or just replaced;
if yes, acquiring a preset wind speed value and a first wind speed value of the fan motor (1), and judging whether the preset wind speed value and the first wind speed value meet a second preset condition or not, wherein the second preset condition comprises: q (Q) v1 ＝Q v0 ±Δ v Wherein Q is v1 For the first wind speed value, Q v0 For the preset wind speed value, delta v Is an interval value;
if the second preset condition is met, acquiring the initial voltage value of the fan motor (1);
after the initial voltage value, the first voltage value and the maximum voltage value of the fan motor (1) are obtained, before the judging whether the first voltage value, the initial voltage value and the maximum voltage value meet the first preset condition, the method further comprises:
judging whether the first voltage value is smaller than the maximum voltage value;
if yes, judging whether the preset wind speed value and the first wind speed value meet a second preset condition or not, wherein the second preset condition comprises: q (Q) v1 ＝Q v0 ±Δ v Wherein Q is v1 For the first wind speed value, Q v0 For the preset wind speed value, delta v Is an interval value;
if not, acquiring the residual life of the high-efficiency filter (2) to be zero.
2. The method for detecting the service life of a high-efficiency filter according to claim 1, wherein if the preset wind speed value and the first wind speed value do not satisfy the second preset condition, determining whether the preset wind speed value and the first wind speed value satisfy a third preset condition, the third preset condition includes: q (Q) v1 ＜Q v0 -Δ v 。
3. The method according to claim 2, wherein the first voltage value is increased by a preset value if the preset wind speed value and the first wind speed value satisfy the third preset condition.
4. The method according to claim 2, wherein the first voltage value is reduced by a preset value if the preset wind speed value and the first wind speed value do not satisfy the third preset condition.
5. The method according to claim 1, wherein the determining whether the first voltage value, the initial voltage value, and the maximum voltage value satisfy the first preset condition includes:
Figure FDA0004116012700000021
wherein U is 0 For the initial voltage value, U max For the maximum voltage value, U 1 For the first voltage value, n is the number of equally divided intervals between the initial voltage value and the maximum voltage value.
6. The method for detecting the service life of the high-efficiency filter according to claim 5, wherein the step of obtaining the remaining service life of the high-efficiency filter (2) according to the first preset condition comprises the steps of:
if the first preset condition is met, acquiring the residual life of the high-efficiency filter (2) as follows
Figure FDA0004116012700000031
7. The method according to claim 1, wherein determining whether the preset wind speed value and the first wind speed value satisfy the second preset condition further comprises:
if the second preset condition is met, judging whether the first voltage value, the initial voltage value and the maximum voltage value meet the first preset condition; if the second preset condition is not met, judging whether the preset wind speed value and the first wind speed value meet a third preset condition or not, wherein the third preset condition comprises: q (Q) v1 ＜Q v0 -Δ v 。
8. The method according to claim 1, further comprising, after said determining whether the first voltage value, the initial voltage value, and the maximum voltage value satisfy the first preset condition:
if the first preset condition is not met, judging whether the first voltage value, the initial voltage value and the maximum voltage value meet a fourth preset condition or not, wherein the fourth preset condition comprises:
Figure FDA0004116012700000032
wherein U is 0 For the initial voltage value, U max For the maximum voltage value, U 1 N is the number of equal division intervals between the initial voltage value and the maximum voltage value, m is the number of cyclic operations, and n is more than or equal to m+1;
if the fourth preset condition is met, acquiring the residual life of the high-efficiency filter (2) as follows
Figure FDA0004116012700000041
And if the fourth preset condition is not met, repeating the circulating operation until the residual service life of the high-efficiency filter (2) is zero.
9. A clean bench, characterized in that the service life of the efficient filter is detected by adopting the method for detecting the service life of the efficient filter according to any one of claims 1 to 8, the clean bench comprises a fan motor (1), the efficient filter (2), a breeze speed sensor (3) and a controller (4), the fan motor (1), the efficient filter (2) and the breeze speed sensor (3) are respectively electrically connected with the controller (4), the fan motor (1) and the breeze speed sensor (3) are respectively arranged on two opposite sides of the efficient filter (2) along the airflow direction, and the controller (4) is used for executing the method for detecting the service life of the efficient filter.
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