A filter screen dirty blockage detection device for air conditioning processing and use method

Abstract

The present invention provides a filter screen dirty blockage detection device and a use method for air-conditioning processing, which belongs to the technical field of air-conditioning processing, and comprises a detection box, wherein two sides of the detection box are respectively provided with an air inlet and an exhaust port, the middle end of the detection box is provided with a detection cavity, and the middle top of the detection box is provided with a filter screen slot; an induced draft fan is installed inside the air inlet, a flow sensor is installed inside the exhaust port, and a PLC controller and a display screen are installed on one side of the detection box; the present invention inserts the air-conditioning filter screen into the detection box, and then uses the induced draft fan to suck the dusty air into the detection box, and the flow sensor detects the change of the air flow at the exhaust port, so as to judge whether the dirty blockage detection of the air-conditioning filter screen is qualified, thereby avoiding the error in conventional current detection, which leads to the inability to accurately reflect the actual dirty blockage situation of the filter screen, and improves the dirty blockage detection effect of the air-conditioning filter screen.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of air conditioning processing, and in particular to a filter screen dirtiness and blockage detection device for air conditioning processing and a use method thereof. Background Art

[0002] The air conditioner filter is an important device for filtering air impurities and preventing dust from entering the indoor unit evaporator. If the air conditioner is used for a long time without cleaning the air conditioner filter, the air conditioner filter will be covered with dust and impurities, which will affect the air intake of the air conditioner indoor unit, resulting in poor cooling and heating effects of the air conditioner, and increasing the power consumption of the air conditioner under the same load demand.

[0003] Therefore, when processing the air conditioner, it is necessary to detect the dirty blockage of the air conditioner filter. The dirty blockage detection method of the filter in the prior art includes: controlling the fan of the indoor unit of the air conditioner to run to the set windshield, detecting the current current of the fan during the actual operation according to the set windshield, and the preset dirty blockage current when the fan runs according to the set windshield when the filter is dirty and blocked; comparing the current current with the preset dirty blockage current, and when the current current is less than or equal to the preset dirty blockage current, determining that the filter installed at the indoor air inlet of the air conditioner is dirty and blocked. The above-mentioned dirty blockage detection method of the filter is to compare the detected current current of the fan with the preset dirty blockage current. Common current detection devices include: sampling circuits composed of current transformers, current sensors or sampling resistors. However, if the current current of the fan is collected by a current transformer or a current sensor, the current transformer and the current sensor themselves have errors during manufacturing, which will cause errors in the current collected by the above-mentioned device, thereby failing to accurately reflect the actual dirty blockage of the filter. Summary of the invention

[0004] The present invention mainly provides a filter screen dirtiness and blockage detection device for air-conditioning processing and a use method thereof to solve the technical problems raised in the above-mentioned background technology.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A filter screen dirty blockage detection device for air conditioner processing, comprising a detection box, an air inlet and an exhaust port are respectively arranged on both sides of the detection box, a detection cavity is arranged at the middle end of the detection box, and a filter screen slot that is connected to the detection cavity is arranged at the middle top of the detection box;

[0007] An induced draft fan is installed inside the air inlet, a flow sensor is installed inside the exhaust port, two electrostatic rods are installed inside the detection box from the detection cavity to the exhaust port, an electrostatic generator electrically connected to the two electrostatic rods is installed on the top of the detection cavity, and a PLC controller and a display screen electrically connected to other electrical components are installed on one side of the detection box.

[0008] Furthermore, in the present invention, the air inlet and the air outlet are both cylindrical pipe structures, and the inner walls of the detection cavity close to the air inlet and the air outlet are both contraction structures.

[0009] Furthermore, in the present invention, an inspection plate is installed on the top of the detection box, and the inspection plate is connected and fixed to the detection box by four fixing bolts.

[0010] Furthermore, in the present invention, a sound and light alarm connected to a PLC controller is installed on one side of the detection box.

[0011] Furthermore, in the present invention, guide strips are installed on the inner wall of the detection box at the filter slot.

[0012] Furthermore, in the present invention, a pressure-sensitive sensor is embedded and installed at the bottom center of the filter slot.

[0013] Furthermore, in the present invention, grooves are provided on both sides of the bottom of the filter slot, and a pushing mechanism is installed in the grooves on both sides of the filter slot. The pushing mechanism includes an electric push rod installed at the bottom of the groove of the filter slot and a pushing block installed on the output end of the electric push rod.

[0014] Furthermore, in the present invention, a dust collecting net bag is installed at the exhaust port, and the dust collecting net bag is connected to the inner wall of the exhaust port by means of internal and external threads.

[0015] Furthermore, in the present invention, the detection method used by any of the above-mentioned air conditioner processing filter dirty blockage detection devices comprises the following steps:

[0016] Step 1: Insert the air conditioner filter into the filter slot. When the bottom of the filter contacts the pressure-sensitive sensor, the pressure-sensitive sensor transmits a signal and the PLC controller makes each device operate.

[0017] Step 2: The induced draft fan draws the dusty air into the test box, and the flow sensor detects the air flow at the exhaust port. At this time, the air flow at the outlet is the initial flow. Then, the experimental dust is gradually added to the air inlet and the air flow at the exhaust port is detected. After the set time has passed, the difference between the initial flow and the final air flow is calculated.

[0018] Step 3: If the air flow difference is lower than the set threshold, it means that the air conditioner filter is qualified; if the air flow difference is higher than the set threshold, it means that the air conditioner filter is unqualified;

[0019] Step 4: When the air-conditioning filter is qualified, the electric push rod operates, and the air-conditioning filter is pushed out by the pushing block, so that the air-conditioning filter extends from the filter slot; if the air-conditioning filter is unqualified, the sound and light alarm operates to remind the staff to handle it.

[0020] Furthermore, in the present invention, an airflow flow difference threshold is provided in the PLC controller, and the airflow flow threshold can be adjusted.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention inserts the air-conditioning filter into the detection box, and then uses the induced draft fan to suck the dusty air into the detection box. The flow sensor detects the change of airflow flow at the exhaust port, and then compares it with the qualified airflow flow difference threshold, so as to determine whether the dirty and blocked detection of the air-conditioning filter is qualified, thereby avoiding the error in conventional current detection, which leads to the inability to accurately reflect the actual dirty and blocked situation of the filter, and improves the dirty and blocked detection effect of the air-conditioning filter.

[0023] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall structure (without the repair plate) of the present invention;

[0026] Figure 3 It is a partial exploded view of the overall structure (without the repair plate) of the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the dust collecting net bag of the present invention.

[0028] In the figure: 10, detection box; 11, air inlet; 12, exhaust port; 13, detection chamber; 14, filter slot; 15, guide strip; 16, inspection panel; 17, dust collection net bag; 20, induced draft fan; 30, electrostatic generator; 31, electrostatic rod; 40, flow sensor; 50, display screen; 60, PLC controller; 70, sound and light alarm; 80, lifting mechanism; 81, electric push rod; 82, push block; 90, pressure sensitive sensor. DETAILED DESCRIPTION

[0029] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0030] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] For examples, please refer to the attached Figure 1-4 A filter screen dirty blockage detection device for air conditioning processing includes a detection box 10, an air inlet 11 and an exhaust port 12 are respectively arranged on both sides of the detection box 10, a detection cavity 13 is arranged at the middle end of the detection box 10, and a filter screen slot 14 that is connected to the detection cavity 13 is arranged at the middle top of the detection box 10;

[0033] An induced draft fan 20 is installed inside the air inlet 11, a flow sensor 40 is installed inside the exhaust port 12, two electrostatic rods 31 are installed inside the detection box 10 from the detection cavity 13 to the exhaust port 12, an electrostatic generator 30 electrically connected to the two electrostatic rods 31 is installed on the top of the detection cavity 13, and a PLC controller 60 and a display screen 50 electrically connected to other electrical components are installed on one side of the detection box 10.

[0034] It should also be noted that, in the present embodiment, the electrical components of the device are all connected to an external power supply, and the detection box 10 at the electrostatic rod 31 is made of transparent material, which is convenient for observing the changes in the amount of dust on the electrostatic rod 31; the appearance of dust on the electrostatic rod 31 indicates that the aperture of the filter may be too large, and dust will pass through the mesh at this time, resulting in poor dust filtering effect, so that the filter cannot reach the dirty and blocked state, resulting in the failure of the dirty and blocked detection of the filter, and this situation needs to be taken into consideration.

[0035] The display screen 50 can display the real-time changes in air flow rate, the amount of dust that has been added, and the operating time.

[0036] For details, please refer to the attached Figure 2 The air inlet 11 and the air outlet 12 are both cylindrical pipe structures, and the inner walls of the detection cavity 13 close to the air inlet 11 and the air outlet 12 are both contraction structures;

[0037] It should be noted that, in the present embodiment, the round tube structure of the air inlet 11 and the air outlet 12 facilitates better air intake and the flow sensor 40 detects the air flow rate.

[0038] For details, please refer to the attached Figure 1 , an inspection plate 16 is installed on the top of the detection box 10, and the inspection plate 16 is connected and fixed to the detection box 10 by four fixing bolts;

[0039] It should be noted that, in this embodiment, the inspection plate 16 can be removed by removing the fixing bolts, thereby facilitating maintenance or cleaning of the internal components of the detection box 10 .

[0040] For details, please refer to the attached Figure 1 A sound and light alarm 70 connected to the PLC controller 60 is also installed on one side of the detection box 10;

[0041] It should be noted that, in this embodiment, when an unqualified filter screen appears, the sound and light alarm 70 is activated to prompt staff to handle the problem.

[0042] For details, please refer to the attached Figure 2 , guide strips 15 are installed on the inner wall of the detection box 10 at the filter slot 14;

[0043] It should be noted that, in this embodiment, the guide strip 15, on the one hand, facilitates the better insertion of the air conditioning filter into the filter slot 14, and on the other hand, prevents air from passing between the air conditioning filter and the inner wall of the detection box 10 to affect the detection effect.

[0044] For details, please refer to the attached Figure 2 A pressure-sensitive sensor 90 is embedded and installed at the bottom center of the filter slot 14;

[0045] It should be noted that, in the present embodiment, when the bottom of the air conditioning filter contacts the pressure-sensitive sensor 90, the pressure-sensitive sensor 90 transmits a signal to the PLC controller 60, so that the device operates automatically, thereby increasing convenience.

[0046] For details, please refer to the attached Figure 3The bottom sides of the filter slot 14 are provided with grooves, and the grooves on both sides of the filter slot 14 are provided with a push mechanism 80, and the push mechanism 80 includes an electric push rod 81 installed at the bottom of the groove of the filter slot 14, and a push block 82 installed on the output end of the electric push rod 81;

[0047] It should be noted that, in the present embodiment, when the air-conditioning filter is found to be qualified for dirtiness or blockage, the lifting mechanism 80 can push out the qualified air-conditioning filter, making it easier to remove the air-conditioning filter from the filter slot 14, and quickly carry out the next air-conditioning filter inspection, thereby increasing work efficiency.

[0048] Furthermore, a dust collecting net bag 17 is installed at the exhaust port 12, and the dust collecting net bag 17 is connected to the inner wall of the exhaust port 12 by means of internal and external threads;

[0049] It should be noted that, in this embodiment, if some dust passes through the air conditioner filter, it will be discharged from the exhaust port 12, and the dust collecting bag 17 can collect the dust and process it uniformly to prevent pollution of the surrounding environment.

[0050] Furthermore, the detection method used by any of the above-mentioned air conditioner processing filter dirty blockage detection devices includes the following steps:

[0051] Step 1: Insert the air conditioner filter into the filter slot 14. When the bottom of the filter contacts the pressure sensor 90, the pressure sensor 90 transmits a signal, and the PLC controller 60 enables each device to operate.

[0052] Step 2: The induced draft fan 20 sucks the dusty air into the test box 10, and the flow sensor 40 detects the air flow at the exhaust port 12. At this time, the air flow at the outlet is the initial flow. Then, the experimental dust is gradually added to the air inlet 11 and the air flow at the exhaust port 12 is detected. After the set time has passed, the difference between the initial flow and the final air flow is calculated.

[0053] Step 3: If the air flow difference is lower than the set threshold, it means that the air conditioner filter is qualified; if the air flow difference is higher than the set threshold, it means that the air conditioner filter is unqualified;

[0054] Step 4: When the air conditioning filter is qualified, the electric push rod 81 operates to push the air conditioning filter up through the push block 82 so that the air conditioning filter extends from the filter slot 14; if the air conditioning filter is unqualified, the sound and light alarm 70 operates to remind the staff to handle it.

[0055] Furthermore, the PLC controller 60 is provided with an airflow difference threshold, and the airflow threshold can be adjusted;

[0056] It should be noted that, in this embodiment, the air flow threshold, the detection time, and the amount of added experimental dust can all be changed according to actual conditions.

[0057] The above is an exemplary description of the present invention in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A filter screen dirty blockage detection device for air conditioning processing, comprising a detection box (10), characterized in that: An air inlet (11) and an air outlet (12) are respectively arranged on both sides of the detection box (10); a detection cavity (13) is arranged at the middle end of the detection box (10); and a filter screen slot (14) which is in communication with the detection cavity (13) is arranged at the middle top of the detection box (10); An induced draft fan (20) is installed inside the air inlet (11), a flow sensor (40) is installed inside the exhaust port (12), two electrostatic rods (31) are installed inside the detection box (10) from the detection cavity (13) to the exhaust port (12), an electrostatic generator (30) electrically connected to the two electrostatic rods (31) is installed on the top of the detection cavity (13), and a PLC controller (60) and a display screen (50) electrically connected to other electrical components are installed on one side of the detection box (10).

2. The filter screen dirty and blocked detection device for air conditioner processing according to claim 1, characterized in that: The air inlet (11) and the air outlet (12) are both cylindrical pipe structures, and the inner walls of the detection cavity (13) close to the air inlet (11) and the air outlet (12) are both contraction structures.

3. The filter screen dirty and blocked detection device for air conditioner processing according to claim 1, characterized in that: An inspection plate (16) is installed on the top of the detection box (10), and the inspection plate (16) is connected and fixed to the detection box (10) via four fixing bolts.

4. The filter screen dirty and blocked detection device for air conditioner processing according to claim 1, characterized in that: A sound and light alarm (70) connected to the PLC controller (60) is also installed on one side of the detection box (10).

5. The filter screen dirty and blocked detection device for air conditioner processing according to claim 1, characterized in that: Guide strips (15) are installed on the inner wall of the detection box (10) at the filter slot (14).

6. The filter screen dirty and blocked detection device for air conditioner processing according to claim 1, characterized in that: A pressure-sensitive sensor (90) is embedded and installed at the bottom center of the filter slot (14).

7. The filter screen dirty and blocked detection device for air conditioner processing according to claim 1, characterized in that: Grooves are arranged on both sides of the bottom of the filter slot (14), and a push-up mechanism (80) is installed in the grooves on both sides of the filter slot (14). The push-up mechanism (80) comprises an electric push rod (81) installed at the bottom of the groove of the filter slot (14), and a push block (82) installed on the output end of the electric push rod (81).

8. The filter screen dirty and blocked detection device for air conditioner processing according to claim 1, characterized in that: A dust collecting net bag (17) is installed at the exhaust port (12), and the dust collecting net bag (17) is connected to the inner wall of the exhaust port (12) by means of internal and external threads.

9. The detection method used in the filter blockage detection device for air conditioner processing according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: insert the air conditioner filter into the filter slot (14), when the bottom of the filter contacts the pressure sensitive sensor (90), the pressure sensitive sensor (90) transmits a signal, and the PLC controller (60) enables each device to operate; Step 2: The induced draft fan (20) draws the dusty air into the detection box (10), and the flow sensor (40) detects the air flow at the exhaust port (12). At this time, the air flow at the air outlet is the initial flow. Then, the experimental dust is gradually added to the air inlet (11) and the air flow at the exhaust port (12) is detected. After a set time has passed, the difference between the initial flow and the final air flow is calculated. Step 3: If the air flow difference is lower than the set threshold, it means that the air conditioner filter is qualified; if the air flow difference is higher than the set threshold, it means that the air conditioner filter is unqualified; Step 4: When the air conditioning filter is qualified, the electric push rod (81) operates to push the air conditioning filter up and out through the push block (82), so that the air conditioning filter extends out from the filter slot (14); if the air conditioning filter is unqualified, the sound and light alarm (70) operates to remind the staff to handle it.

10. The detection method used in the filter blockage detection device for air conditioner processing according to claim 9, characterized in that: The PLC controller (60) is provided with an airflow flow difference threshold, and the airflow flow threshold is adjustable.

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