TWM450700U - Intelligent monitoring system for airflow pipe filter blocking - Google Patents

Description

Intelligent airflow line filter blocking monitoring system

This creation is about a smart airflow filter screen blocking monitoring system, especially one that can automatically detect the blocking state of the filter to show the airflow tube including the degree of filter blocking and reminding to clean or replace the filter. Road monitoring technology.

According to the general positive pressure type blower or the negative pressure type exhaust fan air flow line 50 (ie, the wind pressure line), as shown in FIG. 1 and FIG. 2, the specific implementation structure of the air flow line 50 includes an air intake. The air duct 51 and an air outlet duct 52 communicating with the intake air duct 51, and a fan device 60 is disposed on the wind stomach between the intake air duct 51 and the air outlet duct 52, and is disposed at the air inlet of the intake air duct 51. The 510 is provided with a filter screen 63. When the fan blades 62 on the fan unit 60 are rotated by the motor 61, the outside air can be sucked from the air inlet 510 of the intake air duct 51, and then the air outlet of the air outlet duct 52. 520 discharge. However, most of the above-mentioned conventional structures drive the motor 61 to operate at a fixed rotational speed so that the volume and pressure of the output or the suction are fixed. In addition, if the length of the intake air duct 51, the air outlet duct 52 is increased, the turning angle is too large (as shown in FIG. 2), or the screen 63 is gradually blocked, the air duct resistance in the air flow duct 50 is caused. The increase is such that the amount of airflow is greatly reduced, and the efficiency of the operation and energy use of the fan unit 60 is reduced.

In order to improve the above-mentioned shortcomings, the related art has changed the fixed motor speed control to the variable speed control mode, and its representative patents such as the Republic of China Invention No. 593939 "Filter unit air volume feedback control method and device", and invention First I325220 "Structure of Fan Drive Circuit" and other patents. Among them, the invention patent No. 593939 is to control the fan-filter unit to maintain a constant fixed air supply amount at a preset, and to use the air volume as a feedback control parameter for the motor operation. When the air passage resistance increases, let The motor speed is increased. Conversely, when the air volume is greater than the preset air volume, the motor speed is slowed, and accordingly, the air volume and pressure can be maintained at a constant state. However, the accuracy of the air volume sensor is related to the control performance of the fan motor operation. In other words, under the demand of improving the sensing accuracy, the cost of the wind sensor is inevitably higher than the commercially available tachometer, and this will be greatly increased. Increasing manufacturing costs; not only that, the patent has no function of automatic screen blocking detection, so that users can not be displayed and reminded to clean or replace the filter, resulting in the fan-filter unit being unable to maintain better benefits. Operational status.

As for the invention No. I325220, the main purpose is to set a current reference level by using the characteristics of the air volume and the motor current. When the air volume is reduced by the resistance, the current is reduced to the reference level, and the motor speed is increased to make the motor current and the pre-motor. Set the current reference level to be equal, and keep the airflow constant. Although the patent pre-existing case can improve the situation of reducing the air volume due to the influence of the air duct resistance or back pressure, it is still unable to detect the gradual blockage of the filter screen, and it is timely proposed, as in the aforementioned invention patent No. 593939. The warning is to allow the user to clean or replace the filter screen, so that the fan device is more difficult to maintain in a better operating state.

Therefore, how to develop and improve the shortcomings of the above-mentioned conventional technologies is actually the goal and challenge that the relevant industry needs to work hard to develop. In view of this, the creator is thinking and creative ideas, and has been based on many years of experience. Design, explore and test through multiple parties As a sample test, and many corrections and improvements, finally developed a novel that can improve the lack of conventional technology.

This creation mainly provides a smart airflow filter screen blocking monitoring system that can improve the lack of conventional technology. It can not only monitor the obstruction status of the airflow pipeline, but also issue warning or display screen obstruction degree, air volume and reminder. The user can clean or replace the filter and other information, and the fan device can be maintained in a better operating state by the instant monitoring of the filter. To achieve the above effects, the technical means used in the creation include a motor speed sensing module, a control module and a warning module. The motor speed sensing module is configured to sense the speed of the motor to generate a speed sensing signal. The control module is configured to convert the speed sensing signal number into a sensing speed value and compare it with the set first speed preset value. When the sensing speed value reaches the preset value of the first speed, the control module determines that the filter is in the airflow blocking state, and drives the warning module to send a warning signal, by automatically detecting the blocking state of the filter, so as to include The degree of blockage of the filter and the reminder to clean or replace the filter, so that the fan unit maintains the best operating conditions.

In order for your review board to have a better understanding and understanding of the purpose, technical features and efficacy of this creation, please cooperate with the examples listed below and elaborate on the following:

壹. Basic example of this creation

The present invention is mainly used to monitor the operating state of the fan unit 60 in the air flow line 50, thereby performing an airflow blocking rate or an instantaneous monitoring of the air volume of the air flow line 50. The air flow line 50 described in the present application is mainly applied to electrical equipment such as a vacuum cleaner, a dust collector of a clean room, or an air conditioner. Referring to FIG. 1 and FIG. 2, the specific structure of the airflow line 50 includes a first end and a second end extending in opposite directions. The first end is an air inlet 510, and the second end is an air outlet 520. The filter screen 53 is disposed at the air inlet 510 or at other positions. Fan assembly 60 is located on airflow line 50 between the first end and the second end. Specifically, the air flow line 50 includes an intake air duct 51 having a first end, and an air outlet duct 52 having a second end, and the intake air duct 51 and the air outlet duct 52 are in a connected configuration.

Referring to FIG. 4, the implementation structure of the basic embodiment of the present invention includes a technical component of a rotational speed sensing module 10, a control module 20, and a warning module 30 to monitor the operating state of the fan device 60. . The fan unit 60 shown in Figs. 1 and 2 includes a motor 61 and a fan blade 62 that is coupled to the shaft of the motor 61. The rotational speed sensing module 10 is configured to sense the rotational speed of the motor 61 of the fan device 60 to generate a rotational speed sensing signal. The control module 20 is configured to receive and convert the speed sensing signal to the sensing speed value, and compare it with a preset first speed preset value to determine whether the filter 53 disposed on the airflow line 50 is When the sensing speed value reaches or approaches the preset value of the first speed, the control module 20 determines that the filter screen 53 is in the airflow blocking state, and drives the warning module 30 to send a warning signal.

贰. The specific embodiment of the creation

Referring to FIG. 3 and FIG. 5, the implementation architecture of the specific embodiment of the present invention is shown. In addition to the technical features of the basic embodiment, the present embodiment further includes a current sensing module 40 for sensing the flow. The current of the coil winding of the motor 61 generates a current Sensing signal. During a specific operation, the control module 20 receives and converts the current sensing signal to a sensing current value, and compares it with a current preset value set by the control module 20 to serve as a airflow blocking state of the filter 53. The basis for the judgment. As for the specific embodiment of the above-described rotational speed sensing module 10, one of a general optical rotary encoder or a tachometer can be used. The current sensing module 40 is a general current feedback circuit.

The control module 20 shown in FIG. 3 and FIG. 5 further includes a setting module 21, a signal processing module 22 and a driving module 23. The setting module 21 is configured to set a first speed preset value and a second speed preset value. The signal processing module 22 compares the sensed speed value with the second speed preset value, and outputs a control signal representative of the speed difference. The driving module 23 can be controlled by a control signal to control a power supply (not shown in the figure) to supply power to the motor 61 or a power supply frequency, so that the rotation speed of the motor 61 reaches the second rotation speed preset value. It should be added that the above-mentioned driving module 23 can be a general power modulation circuit, a PWM driving module or a frequency converter; and the power source refers to a DC power supply circuit or an AC power supply circuit. When the power supply to the motor 61 or the power supply frequency reaches a preset increment value, the signal processing module 22 determines that the filter screen 53 is in the airflow blocking state, and drives the warning module 30 to send a warning signal, such as an audio warning signal. . In addition, as shown in FIG. 5, the warning module 30 includes a display module 31 for displaying airflow blocking information and an alarm 32 for generating an airflow blocking warning signal. The control module 20 sets information such as the blocking rate or the air volume corresponding to each of the sensing speed values, and can display the air blocking rate or the air volume through the display module 31 as information such as the blocking rate or the air volume. . And the above blocking rate, air volume and the like can be stored in a memory, due to the amount of air flow and the current flowing through the motor coil And the characteristic relationship of the rotational speed of the motor 61 is proportional to each other. In other words, the larger the amount of airflow is, the larger the current flowing through the coil of the motor 61 is, and the faster the speed of the motor 61 is. On the contrary, the smaller the amount of airflow is, the smaller the current flowing through the coil of the motor 61 is, and the slower the rotation speed of the motor 61 is. This creation uses the above characteristics to define the value of each blocking ratio and the value of each airflow. In addition, the blocking rate and the air output are inversely proportional to each other, that is, the higher the blocking rate, the lower the air volume; conversely, the lower the blocking rate, the higher the air volume.

Participation. The specific implementation of this creation

Referring to FIG. 6, the present invention can preset a speed reference level A according to the original airflow of the fan unit 60 in the free flow field (ie, no back pressure) (ie, the screen 53 blocking rate is 0%), and when the filter 53 of the air inlet 51 is completely blocked (ie, the screen 53 is 100% blocked), the reference level B is set, and a preset level A is set (ie, the second speed is preset). Value) and preset level B (ie the first speed preset value). When the fan unit 60 needs to increase the airflow line 50 or the airflow line 50 has a turning angle according to the current situation of the installation site, factors such as air duct resistance or back pressure will reduce the air volume, and the motor 61 will increase the speed to compensate. At the moment, the speed of the motor 61 is the preset level A. The level of the level also indicates whether the installation process is good or not.

Moreover, the action area between the preset level A and the reference level B can also reflect the blocking rate of the filter 53 after the installation in the field is 0-100%, and the fan device 60 compensates when the screen 53 is gradually blocked. The air volume, the motor 61 will also gradually increase the rotational speed. When the rotational speed reaches the preset level B, and is detected by the rotational speed sensing module 10 and the current sensing module 40, the control module 20 drives the warning module 30. The alarm device 32 sends out a warning signal, or the display module 31 displays a reminder to the user to clean or replace the filter 53. News.

Conclusion

Therefore, with the above-mentioned structural arrangement, the creation can indeed improve the lack of the prior art, not only can monitor the obstruction state of the airflow pipeline, but also can issue a warning or display screen obstruction degree, the amount of airflow, and remind the user to clean or replace. Filters and other information, through the real-time monitoring of the filter, enable the fan unit to maintain a better operating state.

The above is only one of the possible embodiments of the present invention, and is not intended to limit the scope of the patents of the present invention, and the equivalent implementations of other changes according to the contents, features and spirits of the following claims are It should be included in the scope of this creation patent. This creation is specifically defined in the structural characteristics of the request item, is not found in similar items, and is practical and progressive. It has met the requirements of the new patent, and has applied for it according to law. Please ask the bureau to approve the patent according to law to maintain this The legal rights of the applicant.

10‧‧‧Speed sensing module

20‧‧‧Control Module

21‧‧‧Setting module

22‧‧‧Signal Processing Module

23‧‧‧Drive Module

30‧‧‧Warning module

31‧‧‧Display module

32‧‧‧Alarm

40‧‧‧ Current Sensing Module

50‧‧‧Airflow line

51‧‧‧Intake air duct

510‧‧‧ inlet

52‧‧‧Exhaust duct

520‧‧‧air outlet

53‧‧‧ Filter

60‧‧‧Fan device

61‧‧‧Motor

62‧‧‧fan blades

Figure 1 is a schematic view of the implementation of a gas flow line.

Figure 2 is a schematic view of another embodiment of the gas flow line.

Figure 3 is a schematic diagram of the block control of the present creation combined with the airflow line.

Figure 4 is a block diagram showing the basic control of the present embodiment.

Figure 5 is a block diagram showing the control of a specific embodiment of the present invention.

Figure 6 is a schematic diagram showing the relationship between the rotational speed and time of the present creation.

10‧‧‧Speed sensing module

21‧‧‧Setting module

22‧‧‧Signal Processing Module

23‧‧‧Drive Module

40‧‧‧ Current Sensing Module

50‧‧‧Airflow line

510‧‧‧ inlet

53‧‧‧ Filter

60‧‧‧Fan device

61‧‧‧Motor

62‧‧‧fan blades

Claims (9)

An intelligent airflow pipeline screen blocking monitoring system monitors the operating state of a fan device in a gas flow pipeline, the monitoring system comprising a motor speed sensing module, a control module and a warning module. The motor speed sensing module is configured to sense a speed of a motor of the fan device to generate a speed sensing signal, and the control module is configured to receive and convert the speed sensing signal to a sensing speed value, and Setting a first preset speed value for comparison to determine whether at least one filter disposed on the airflow line is blocked. When the sensed speed value reaches a preset value of the first speed, the control module is The filter is determined to be in a blocked airflow state, and the warning module is driven to send a warning signal. The intelligent airflow pipe screen blocking monitoring system according to claim 1, wherein the speed sensing module is selected from the group consisting of an optical rotary encoder and a tachometer. The intelligent airflow filter screen blocking monitoring system of claim 1, further comprising a current sensing module for sensing a current flowing through a coil winding of the motor to generate a current sensing signal The control module receives and converts the current sensing signal to a sensing current value, and compares it with a current preset value set by the control module to serve as a reference for determining the airflow blocking state of the filter. The intelligent airflow line filter blocking monitoring system according to claim 1, wherein the current sensing module is a current feedback circuit. The intelligent airflow pipe filter blocking monitoring system according to claim 1, wherein the control module is configured to have a second speed preset higher than the preset value of the first speed. a value for accusing the motor to reach the second speed preset value. The smart airflow filter screen blocking monitoring system of claim 1, wherein the warning module comprises a display module, the control module is configured with a blocking ratio corresponding to each of the sensing rotational speed values or Information such as the amount of air output, and information such as the airflow blocking rate or the air volume is displayed through the display module. The intelligent airflow pipe filter blocking monitoring system according to claim 1, wherein the control module is configured to have a second rotational speed preset value higher than the preset value of the first rotational speed, and the control module includes a setting. a module, a signal processing module and a driving module, wherein the setting module is configured to set the first speed preset value and the second speed preset value, and the signal processing module compares the sensing speed value with the a control signal is outputted by the difference between the preset values of the second rotational speed, and the driving module can be controlled by the control signal to control the power supply or the power supply frequency of the power supply to the motor, so that the rotational speed of the motor reaches the The second speed preset value, when the power supply to the motor or the power supply frequency reaches a preset increment value, the signal processing module determines that the filter is in a airflow blocking state, and drives the warning module to issue The warning signal. The smart airflow line filter obstruction monitoring system of claim 1, wherein the airflow conduit includes a first end and a second end extending in opposite directions, the first end being an air inlet, the first The air outlet is at the two ends, the screen cover is disposed at the air inlet, and the fan device is located on the air flow line between the first end and the second end. The intelligent airflow pipe screen blocking monitoring system according to claim 1 or 8, wherein the airflow pipe can be disposed in a vacuum cleaner, a dust collector or an air conditioner.