Automatic replacement device for kitchen fume purification filter screen

Abstract

The utility model relates to an automatic replacing device for a kitchen fume purification filter screen, which is characterized in that two sides of a filter frame in the device are fixedly connected with a mounting door plate, the upper part of the filter frame is provided with a driving shaft, the driving shaft is connected with a stepping motor fixedly connected to the outer side surface of the mounting door plate, and the lower part of the filter frame is provided with a filter screen fixing shaft; a transmission shaft is arranged in the middle of the filter frame; a fabric filter screen is wound on the driving shaft, the transmission shaft and the filter screen fixing shaft; the differential pressure sensor is connected with the stepping motor through a control system. The oil fume filtering device effectively solves the problem that the oil fume filtering fabric filter screen needs to be replaced frequently. Aiming at a large Chinese food cooking scene with huge oil fume yield, by adopting the automatic replacement device disclosed by the utility model, the manual replacement frequency of the filter screen can be reduced by more than 80% in the process of purifying the oil fume by using the fabric filter screen, so that both hands of a user are effectively liberated, and the cost in equipment maintenance is reduced.

Description

Technical Field

[0001] The utility model relates to an automatic replacement device for oil fume filters, belonging to the technical field of waste gas treatment. Background Technique

[0002] In the field of kitchen fume purification, fabric filters can generally be used to filter micron-sized oil droplet particles in fume exhaust gas, and at the same time can absorb and intercept water vapor in the fume exhaust gas. It can either be used alone as the core treatment process of a fume purification system or as a pretreatment process for other fume purification technologies (such as electrostatic precipitation, activated carbon adsorption, etc.). It is a relatively mature and common treatment technology.

[0003] Due to the huge output of cooking fume in Chinese cuisine, during actual use, the fabric filter will quickly become saturated with filtration, resulting in a rapid increase in the operating resistance of the exhaust system. At this time, the filter needs to be replaced in a timely manner, otherwise the system will not be able to exhaust smoke normally. Among the currently known kitchen fume purification equipment, fabric filters all need to be manually replaced. Due to the need for frequent maintenance operations, its application range is limited. Summary of the Invention

[0004] Aiming at the pain point problem of frequent replacement of fabric filters in the field of fume purification technology, the utility model proposes an automatic replacement device for kitchen fume purification filters, which can effectively reduce the manual replacement frequency, reduce the equipment maintenance cost, and broaden the application scenario of fabric filter technology.

[0005] To achieve the above object, the technical solution of the utility model is: an automatic replacement device for kitchen fume purification filters, including a stepper motor, a mounting door panel, a filter frame, a filter screen fixing shaft, a fabric filter screen, a transmission shaft, a driving shaft, a differential pressure sensor, and a control system. The two sides of the filter frame are fixedly connected to the mounting door panel. The upper part of the filter frame is provided with a driving shaft, and the driving shaft is connected to the stepper motor fixedly connected to the outer side of the mounting door panel. The lower part of the filter frame is provided with a filter screen fixing shaft, and a transmission shaft is provided in the middle of the filter frame; the fabric filter screen is wound around the driving shaft, the transmission shaft, and the filter screen fixing shaft; the differential pressure sensor is connected to the stepper motor through the control system.

[0006] Further, the fabric filter screen is wound and fixed on the filter screen fixing shaft, with a damping spring clip connected to one side and fixed to the driving shaft after passing through the transmission shaft on the other side, forming a wavy filter screen structure.

[0007] Further, the differential pressure sensor is used to detect the pressure difference before and after the oil droplets adsorbed by the fabric filter screen, and transmit the data of the pressure difference to the control system. The control system outputs a control signal to the stepper motor to control the rotation of the stepper motor.

[0008] Further, when the differential pressure detected by the differential pressure sensor reaches the set value, the control system controls the driving stepping motor to rotate, thereby automatically replacing the fabric filter screen.

[0009] Further, the set value of the differential pressure is 50 Pa to 500 Pa, including 150 Pa and 300 Pa.

[0010] Further, the total length of the fabric filter screen is 20 m, and the unfolded area is 8 m 2 .

[0011] The beneficial effects of the present utility model are as follows:

[0012] The present utility model provides an automatic replacement device for a fabric filter screen for kitchen fume purification, effectively solving the pain point problem that the fabric filter screen for fume filtration needs to be frequently replaced. For large-scale Chinese cooking scenarios with a huge fume output, by adopting the automatic replacement device of the present utility model, during the process of using the fabric filter screen to purify fume, the manual replacement frequency of the filter screen can be reduced by more than 80%, thereby effectively liberating the hands of users and reducing the cost in equipment maintenance. Description of the Drawings

[0013] Figure 1 is the structural diagram of the automatic replacement device of the present utility model;

[0014] Among them: (a) is the front view, (b) is the left view;

[0015] Figure 2 is the three-dimensional view of the automatic replacement device of the present utility model;

[0016] Explanation of each mark in the drawings: Sequence 1 stepping motor, Sequence 2 installation door panel, Sequence 3 installation handle, Sequence 4 filter frame, Sequence 5 filter screen fixing shaft, Sequence 6 damping spring clip, Sequence 7 fabric filter screen, Sequence 8 transmission shaft, Sequence 9 knurled nut, Sequence 10 driving shaft. Specific Embodiments

[0017] The present utility model provides an automatic replacement device for a fabric filter screen for kitchen fume purification and its control method. To make the technical advantages and solutions of the present utility model clearer and more definite, the following takes a specific embodiment of a fabric filter screen automatic replacement device with a rated fume treatment air volume of 3000 m 3 / h as an example to describe the present utility model in detail.

[0018] (1) The fume treatment air volume is 3000 m 3 / h, and the fume removal rate of the fabric filter screen during the cooking process is 80%, and it intercepts about 1.2 mg / m 3 of fume particles. The installed fabric filter screen has a width of 0.4 m and an effective windward area of 0.2 m 2, the amount of fume that can be absorbed is about 28 g. Calculated based on 5 hours of cooking work per day, the single replacement cycle of the filter screen is 1.5 days;

[0019] (2) The structure of the automatic replacement device of the present utility model is as shown in Figure 1 (a), (b) of Figure 2 shown. The filter screen automatic replacement device mainly consists of a stepper motor 1, a mounting door panel 2, a filter frame 4, a filter screen fixing shaft 5, a transmission shaft 8, a driving shaft 10, a differential pressure sensor, and a control system; both sides of the filter frame 4 are fixedly connected to the mounting door panel 2, the upper part of the filter frame 4 is provided with a driving shaft 10, the driving shaft 10 is connected to the stepper motor 1 fixedly connected to the outer side surface of the mounting door panel 2, the lower part of the filter frame 4 is provided with a filter screen fixing shaft 5, and 3 transmission shafts 8 are provided in the middle of the filter frame 4. The differential pressure sensor is connected to the stepper motor 1 through the control system. The differential pressure sensor is used to detect the front and back pressure difference values of the oil droplets adsorbed by the fabric filter screen 7, and transmits the data of the pressure difference value to the control system. The control system outputs a control signal to the stepper motor 1 to drive the stepper motor 1 to rotate.

[0020] (3) The fabric filter screen 7 is first wound and fixed on the filter screen fixing shaft 5, with a damping spring clip 6 connected to one side and fixed to the driving shaft 10 after passing through 3 transmission shafts 8 on the other side, thus forming a wavy filter screen structure;

[0021] (4) When the oil droplets adsorbed by the fabric filter screen 7 gradually accumulate, the pressure difference between the front and back will rise accordingly. When the pressure difference detected by the differential pressure sensor reaches the set value (300 Pa), the system will start the automatic replacement program; the set value of the pressure difference for automatic replacement of the filter screen needs to be determined according to the air volume processed by the system and the characteristics of the filter screen. Generally, the set value is 50 Pa to 500 Pa. Preferably, the set value of the pressure difference is 150 Pa to 300 Pa.

[0022] (5) After the automatic replacement program is started, it will control the deceleration stepper motor 1 to drive the driving shaft 10 to rotate slowly, and the dirty and blocked filter screen will also wind and gather on the driving shaft 10 accordingly. When the stepper motor reaches the set number of rotation turns (10 turns), it stops running, and thus a single automatic replacement process is completed;

[0023] (6) The total length of the fabric filter screen 7 installed in the automatic replacement device is 20 m, and the unfolded area is 8 m 2 , and it can be automatically used for 40 filter screen automatic replacement cycles. The replacement cycle for manually replacing the filter cartridge is about 60 days.

Claims

1. An automatic replacement device for kitchen fume purification filter, characterized in that: It includes a stepper motor, a mounting door panel, a filter frame, a filter fixing shaft, a fabric filter, a transmission shaft, a driving shaft, a pressure difference sensor and a control system. The mounting door panels are fixedly connected on both sides of the filter frame. A driving shaft is provided on the upper part of the filter frame, and the driving shaft is connected to the stepper motor fixedly connected to the outer side of the mounting door panel. A filter fixing shaft is provided at the lower part of the filter frame, and three transmission shafts are provided in the middle part of the filter frame; a fabric filter is wound on the driving shaft, the transmission shaft and the filter fixing shaft; the pressure difference sensor is connected to the stepper motor through the control system.

2. The automatic replacement device for kitchen fume purification filter according to claim 1 is characterized in that: The fabric filter is wound and fixed on the filter fixing shaft, one side of which is connected with a damping spring clip, and the other side is fixed on the driving shaft after passing through three transmission shafts, forming a wave-shaped filter structure.

3. The automatic replacement device for kitchen fume purification filter according to claim 1 is characterized in that: The setting value of the front and rear pressure difference of the oil droplets adsorbed by the fabric filter detected by the pressure difference sensor is 50Pa to 500Pa, including 150Pa and 300Pa.

4. The automatic replacement device for kitchen fume purification filter according to claim 1 is characterized in that: The total length of the fabric filter is 20m and the unfolded area is 8m 2 .

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