A mold-proof spray device
By introducing an overflow chamber and a ventilation component into the anti-mold spray device, the problem of anti-mold agent mist overflow was solved, achieving the effects of reducing environmental impact and improving work comfort.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FOSHAN CITY YUTAI MACHINERY AUTOMATIC TECHNOLOGY CO LTD
- Filing Date
- 2025-06-10
- Publication Date
- 2026-07-10
AI Technical Summary
When existing anti-mold spray devices spray anti-mold agents, the anti-mold mist is prone to overflowing onto the outside of the box, resulting in odors and chemical residues, which affects the working comfort of on-site personnel.
An anti-mildew spray device was designed, comprising a spray chamber and an overflow chamber. An exhaust fan is used to draw the overflowing mist into the air duct to reduce the leakage of mist. The spray volume is controlled by a partition curtain and a position sensor to ensure that the mist is effectively sprayed within the spray chamber.
It effectively reduces the impact of anti-mold agent mist on the external environment, improves the working comfort of on-site personnel, and at the same time ensures the anti-mold effect of the product spray and production efficiency.
Smart Images
Figure CN224475166U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of anti-mildew treatment technology, and in particular to an anti-mildew spray device. Background Technology
[0002] Anti-mold agents are additives that prevent the growth of mold. Many products, such as handicrafts (e.g., shoes), leather, and plastics, are sprayed with anti-mold agents before leaving the factory, which can prevent the products from getting moldy to a certain extent.
[0003] In related technologies, anti-mold spray boxes can be used to complete the anti-mold process of products. They mainly use spray guns or nozzles on the top of the box to spray anti-mold agents onto the products entering the box, thus completing the anti-mold process.
[0004] However, in actual operation, the anti-mold spray may overflow onto the outside of the box, causing odors or chemical residues on the outside of the box, which may affect the work of on-site personnel. Utility Model Content
[0005] To address the shortcomings of existing technologies, this invention provides an anti-mildew spray device that effectively reduces the impact of anti-mildew spray on the external environment and improves the comfort of on-site personnel.
[0006] To solve the above-mentioned technical problems, this utility model provides an anti-mildew spray device, comprising:
[0007] The first housing has a spray chamber and an overflow chamber communicating with the spray chamber. The overflow chamber is located around the spray chamber, and a spray assembly is located inside the spray chamber.
[0008] The second housing is connected to the outside of the first housing, and an air duct is formed inside the second housing, which is connected to the overflow cavity; the second housing is provided with an exhaust fan, which is connected to the air duct, and the exhaust fan is used to exhaust air from the overflow cavity and extract the mist that overflows into the overflow cavity.
[0009] As an improvement to the above solution, at least two overflow chambers are formed, and the spray chamber is arranged in a straight line with the at least two overflow chambers, with one of the overflow chambers located on one side of the spray chamber and the other overflow chamber located on the other side of the spray chamber.
[0010] As an improvement to the above solution, the overflow chamber and the spray chamber are separated by a partition curtain, which is made of a soft material.
[0011] As an improvement to the above solution, an overflow gap is formed between the partition curtain and the inner wall of the first box, and / or an overflow gap is formed between two adjacent partition curtains.
[0012] As an improvement to the above solution, a position sensor is provided on the side of the overflow chamber away from the spray chamber, and the position sensor is electrically connected to the spray assembly.
[0013] As an improvement to the above solution, the spray assembly includes a connecting bracket, a control valve, and a nozzle. The connecting bracket is located on the top of the first housing, the control valve is located on the connecting bracket, the nozzle is connected to the control valve via an infusion pipeline, and the spray end of the nozzle extends into the spray chamber.
[0014] As an improvement to the above solution, the connecting bracket is provided with a lifting component, the nozzle is connected to the lifting component, and the lifting component is used to drive the nozzle to move up and down.
[0015] As an improvement to the above solution, the lifting component includes a screw arranged vertically on the connecting bracket, the screw is connected to a slider, a horizontal connecting plate is abutted above the slider, the control valve is provided with a mounting plate, and the horizontal connecting plate is connected to the mounting plate.
[0016] As an improvement to the above solution, a connecting groove is formed on the side of the second housing facing the first housing, and the connecting groove communicates with the overflow cavity;
[0017] The top surface of the second housing has a ventilation hole that communicates with the communicating groove. The exhaust fan is located on the outer top wall of the second housing, and the air inlet of the exhaust fan communicates with the ventilation hole.
[0018] As an improvement to the above solution, the sidewall of the overflow cavity is formed with a number of connecting holes, the connecting groove is connected to the overflow cavity through the connecting holes, and a filter plate is provided inside the connecting groove.
[0019] The present invention has the following beneficial effects:
[0020] The anti-mold spray device of this embodiment can spray anti-mold agent onto the product using the spray assembly of the spray chamber to complete the anti-mold process. During anti-mold spraying, the overflow chamber located around the spray chamber provides overflow space for the anti-mold agent mist overflowing from the overflow chamber, preventing the mist from directly overflowing to the outside of the first housing. Simultaneously, under the action of the exhaust fan, the mist overflowing into the overflow chamber can be drawn into the air duct from the overflow chamber. Thus, the combined action of the overflow chamber and the exhaust fan prevents the mist from further overflowing into the external environment of the first housing, effectively reducing the impact of the anti-mold agent mist on the external environment and improving the comfort of on-site personnel.
[0021] Furthermore, since the exhaust fan draws out the mist that overflows into the overflow chamber, it does not affect the mist in the spray chamber, thus preventing the mist from being drawn away before it is sprayed onto the product and effectively ensuring the anti-mildew effect of the spray on the product. Attached Figure Description
[0022] Figure 1 This is a three-dimensional structural schematic diagram of the anti-mildew spray device in one embodiment of the present invention;
[0023] Figure 2 This is a schematic diagram showing the relative positions of the spray chamber and the overflow chamber in one embodiment of the present invention;
[0024] Figure 3 yes Figure 2 Enlarged structural diagram at point A;
[0025] Figure 4 This is an exploded structural diagram of the anti-mildew spray structure in one embodiment of the present invention;
[0026] Figure 5 yes Figure 4 Enlarged structural diagram at point B;
[0027] Figure 6 This is a schematic diagram of the main structure of the partition curtain in one embodiment of the present invention;
[0028] Figure 7 This is an exploded structural diagram of the spray assembly in one embodiment of the present invention;
[0029] Figure 8 This is a schematic diagram showing the positional distribution between the lifting component and the spray assembly in another embodiment of this utility model. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.
[0031] The anti-mildew spray device of this invention can effectively reduce the impact of anti-mildew spray on the external environment and improve the comfort of on-site personnel.
[0032] In embodiments of this utility model, such as Figure 1 , Figure 2 and Figure 4As shown, the anti-mildew spray device includes a first housing 1 and a second housing 2 connected to the outside of the first housing 1. The first housing 1 has a spray chamber 11 and an overflow chamber 12 communicating with the spray chamber 11. The overflow chamber 12 is located around the spray chamber 11, and a spray assembly 13 is disposed inside the spray chamber 11. The second housing 2 has an air duct 21 formed inside, which communicates with the overflow chamber 12. The second housing 2 is provided with an exhaust fan 22, which is connected to the air duct 21. The exhaust fan 22 is used to exhaust air from the overflow chamber 12 and to extract the mist that overflows into the overflow chamber 12.
[0033] The anti-mold spray device of this embodiment can spray anti-mold agent onto the product using the spray assembly 13 of the spray chamber 11 to complete the anti-mold process. During anti-mold spraying, the overflow chamber 12 located around the spray chamber 11 provides overflow space for the anti-mold agent mist overflowing from the overflow chamber 12, preventing the mist from directly overflowing to the outside of the first housing 1. Simultaneously, under the action of the exhaust fan 22, the mist overflowing into the overflow chamber 12 can be drawn into the air duct 21 from the overflow chamber 12. Thus, with the combined action of the overflow chamber 12 and the exhaust fan 22, the mist is prevented from further overflowing into the external environment of the first housing 1, effectively reducing the impact of the anti-mold agent mist on the external environment and improving the comfort of on-site personnel.
[0034] Furthermore, since the exhaust fan 22 draws in the mist that overflows into the overflow chamber 12, it does not affect the mist in the spray chamber 11, thus preventing the mist from being drawn away before it is sprayed onto the product and effectively ensuring the anti-mildew effect of the spray on the product.
[0035] It should be noted that the anti-mold spray device provided in this embodiment is preferably used for anti-mold spraying on shoes. Of course, in other embodiments, the anti-mold spray device can also be used for anti-mold spraying on toys, handicrafts, or other products that require anti-mold treatment, and the choice can be made according to actual needs.
[0036] Specifically, such as Figure 2 and Figure 4 As shown, at least two overflow chambers 12 are formed. The spray chamber 11 and the at least two overflow chambers 12 are arranged in a straight line, with one overflow chamber 12 located on one side of the spray chamber 11 and the other overflow chamber 12 located on the other side of the spray chamber 11, so that the spray chamber 11 is arranged in the middle of the two overflow chambers 12, ensuring that the overflow chamber 12 can provide overflow space for the anti-mildew agent mist overflowing from the spray chamber 11. At the same time, the straight-arranged spray chamber 11 and overflow chamber 12 are easy to integrate into the production line. The product can enter the first box 1 from one of the overflow chambers 12, and after being sent into the spray chamber 11 to complete the anti-mildew process, it can be sent out of the first box 1 from the other overflow chamber 12, thereby improving the production efficiency of the anti-mildew process.
[0037] Furthermore, in other embodiments, the overflow chambers 12 located on both sides of the spray chamber 11 can also serve as auxiliary processes for the anti-mildew process, thereby further improving production efficiency. For example, an ultraviolet disinfection lamp can be arranged in the first overflow chamber 12, making the first overflow chamber 12 a disinfection zone to disinfect the products entering the first box 1; a heating lamp can be arranged in the second overflow chamber 12, making the second overflow chamber 12 a drying zone to dry the products that have completed the anti-mildew process, ensuring the quality of the processed products.
[0038] In addition, it should be noted that, in addition to the above-mentioned arrangement, the overflow chamber 12 can also be arranged such that the overflow chamber 12 surrounds the spray chamber 11, that is, the spray chamber 11 is located in the center and the overflow chamber 12 surrounds the spray chamber 11 in a ring (the spray chamber 11 and the overflow chamber 12 are arranged in a similar "U" shape), so that the overflow chamber 12 can collect the overflow mist in all directions and avoid residual dead corners.
[0039] More specifically, to facilitate the delivery of the product into the spray chamber 11 for anti-mildew spraying, a conveyor line (not shown in the figure) is provided below the first housing 1. The conveyor line travels in a preset direction, which is one side of the overflow chamber 12 facing the other overflow chamber 12 (i.e., Figure 1 (as shown in the X-axis direction) to integrate the first housing 1 with the production line, while facilitating the delivery of products into the spray chamber 11 to complete the batch spraying of products for mildew prevention, further improving the efficiency of the mildew prevention process, and reducing the risk of mildew agent contact when on-site personnel transfer products.
[0040] It should be noted that the production line may include a fixed frame, a conveyor belt, and a drive motor. The conveyor belt and drive motor are mounted on the fixed frame, and the drive motor can be connected to the conveyor belt via a gear set or other transmission assembly. The conveyor belt travels in a preset direction, so that the drive motor drives the conveyor belt to move the products into the first housing, and then sequentially through one overflow chamber 12, the spray chamber 11, and the other overflow chamber 12 to complete the batch spray anti-mildew process. Furthermore, by adjusting the conveyor belt speed, the residence time of each product in the spray chamber 11 can be ensured to be consistent, ensuring the uniformity of spraying for each product and improving the spraying quality.
[0041] The conveyor belt is preferably made of mildew-proof and corrosion-proof materials (such as stainless steel mesh belt) to avoid long-term contact with mildew inhibitors, which can lead to aging.
[0042] In this embodiment, as Figure 2 and Figure 4As shown, the overflow chamber 12 and the spray chamber 11 are separated by a partition curtain 14. The partition curtain 14 is made of soft material and can form a curtain-like barrier at the junction of the overflow chamber 12 and the spray chamber 11. When the product enters the spray chamber 11 from the overflow chamber 12, the partition curtain 14 opens and closes after the product passes through, thereby maintaining the separation between the overflow chamber 12 and the spray chamber 11 while ensuring that the conveying of the product between the overflow chamber 12 and the spray chamber 11 is not affected.
[0043] Furthermore, an overflow gap 141 is formed between the partition curtain 14 and the inner wall of the first housing 1, and / or an overflow gap 141 is formed between two adjacent partition curtains 14, so as to connect the overflow chamber 12 and the spray chamber 11 through the overflow gap 141, so that when the anti-mildew agent mist is sprayed on the product, the excess mist can overflow from the overflow gap 141 into the overflow chamber 12 for the exhaust component 22 and the second housing 2 to be recovered.
[0044] Specifically, such as Figure 2 and Figure 6 As shown, a connector 142 is provided on the top wall of the first housing 1. The connector 142 can be an angle iron, and the upper end of the connector 142 is welded to the top wall of the first housing 1. A fixing plate 143 is provided on the lower end of the connector 142. The upper end of the partition curtain 14 is connected to the lower end of the connector 142 through the fixing plate 143 and fasteners (such as bolts or studs) to ensure the installation stability of the partition curtain 14.
[0045] It should be noted that the partition curtain 14 can be made of PVC strip curtain or silicone strip curtain.
[0046] It should also be noted that, such as Figure 1 , Figure 2 and Figure 4 As shown, a partition curtain 14 is also provided on the side of the overflow chamber 12 away from the spray chamber 11 (i.e., the inlet position of the first box 1 and the outlet position of the first box 1) so that the product can enter the overflow chamber 12 or be sent out from the overflow chamber 12 after the anti-mildew process is completed.
[0047] In some alternative embodiments, to facilitate control of the spray assembly 13, such as Figure 2 and Figure 3 As shown, a position sensor 15 is provided on the side of the overflow chamber 12 away from the spray chamber 11, and the position sensor 15 is electrically connected to the spray assembly 13. Therefore, after the position sensor 15 detects that the product has entered the overflow chamber 12, the position sensor 15 can control the spray assembly 13 to start, thereby spraying the product with anti-mold agent mist and completing the anti-mold process.
[0048] It should be noted that the opening time of the spray assembly 13 can be set according to the distance S between the position sensor 15 and the spray assembly 13 and the conveying speed v of the conveyor belt, so as to ensure that the spray assembly 13 is turned on after the product is conveyed to the corresponding position of the spray assembly 13, thereby reducing the waste of anti-mildew agent spray.
[0049] In this embodiment, the position sensor 15 is preferably a photoelectric encoder.
[0050] In some alternative embodiments, such as Figure 2 and Figure 7 As shown, the spray assembly 13 includes a connecting bracket 131, a control valve 132, and a nozzle 133. The connecting bracket 131 is located on the top of the first housing 1, and the control valve 132 is located on the connecting bracket 131 to ensure the stability of the control valve 132 and the nozzle 133 on the top of the first housing 1. The nozzle 133 is connected to the control valve 132, and the spray end of the nozzle 133 extends into the spray chamber 11. Therefore, when the nozzle 133 sprays the antifungal agent mist onto the product, the spray volume of the nozzle 133 can be controlled by adjusting the opening degree of the control valve 132, and the spray frequency of the nozzle 133 can be controlled by adjusting the switching frequency of the control valve 132. This ensures that the antifungal agent mist can form an antifungal protective film on the product, achieving antifungal protection while simultaneously controlling the overflow of the antifungal agent mist to prevent further overflow into the outside of the first housing 1 after overflowing into the overflow chamber 12, thus avoiding mist waste.
[0051] It should be noted that, for example Figure 1 , Figure 2 and Figure 4 As shown, a mildew inhibitor storage tank 17 is installed on the side of the first housing 1. A control valve 132 is connected to a delivery pipeline. The end of the delivery pipeline away from the control valve 132 is connected to the mildew inhibitor storage tank 17 via a water pump to pump liquid mildew inhibitor to the nozzle 133. The mildew inhibitor storage tank 17 is equipped with a liquid level sensor 171, which can detect the liquid level inside the mildew inhibitor storage tank 17 to remind on-site personnel to add water in time or stop adding water.
[0052] It should also be noted that the nozzle 133 and the control valve 132 are preferably connected by a double-connector 134.
[0053] Furthermore, the production line is equipped with a drive unit, preferably a drive motor. During the production line transport of products, different product specifications typically require corresponding adjustments to the conveyor belt speed to provide sufficient processing time for each step. Based on this, to facilitate adaptive adjustment of the spray frequency of nozzle 133 according to different product specifications, the drive unit is electrically connected to control valve 132. This allows the drive unit to control the conveyor belt speed and simultaneously adjust the opening of control valve 132 based on the operating status of the drive motor, thus linking the conveyor belt speed with the spray frequency of nozzle 133. This enables automatic adjustment of the spray frequency of nozzle 133 based on the conveyor belt speed, ensuring spray quality while improving spray efficiency.
[0054] For example, when a conveyor belt is transporting small shoes, the conveyor belt moves at a relatively high speed. At this time, the switching frequency of the control valve 132 can be increased by the drive component to achieve high-frequency spraying of the small shoes. When transporting large shoes, the conveyor belt moves at a relatively low speed. At this time, the switching frequency of the control valve 132 can be decreased by the drive component to achieve low-frequency spraying of the large shoes.
[0055] Furthermore, such as Figure 8 As shown, the connecting bracket 131 is provided with a lifting component 16, and the nozzle 133 is connected to the lifting component 16. The lifting component 16 is used to drive the nozzle 133 to move up and down, so as to adjust the height of the nozzle 133 in the spray chamber 11 accordingly, adapting to products of different heights and / or shapes, and improving the uniformity of the mist coverage on the surface of different shoe products.
[0056] Specifically, such as Figure 8 As shown, the lifting component 16 includes a screw 161 vertically arranged on the connecting bracket 131. The screw 161 is connected to a slider 162. A horizontal connecting plate 163 abuts against the top of the slider 162. The control valve is provided with a mounting plate 135. The horizontal connecting plate 163 is connected to the mounting plate 135. Thus, by moving the slider 162 up and down relative to the screw 161, the horizontal connecting plate 163 is pushed up and down, which in turn drives the nozzle 133 and the solenoid valve to move up and down synchronously, thereby adjusting the height of the nozzle 133 in the spray chamber 11 so that the nozzle 133 can adapt to different shoe types.
[0057] In some alternative embodiments, such as Figure 4As shown, a connecting groove 211 is formed on the side of the second housing 2 facing the first housing 1, and the connecting groove 211 communicates with the overflow cavity 12; a ventilation hole 221 is formed on the top surface of the second housing 2, which communicates with the connecting groove 211; an exhaust fan 22 is located on the outer top wall of the second housing 2, and the air inlet of the exhaust fan 22 communicates with the ventilation hole 221, so as to form an air duct 21 using the connecting groove 211, and so that the exhaust fan 22 can act on the overflow cavity 12 through the connecting groove 211. Therefore, when the spray assembly 13 sprays the antifungal agent mist into the product in the spray cavity 11, the exhaust fan 22 can work to form a directional airflow from the overflow cavity 12 to the connecting groove 211 at the overflow cavity 12 and the connecting groove 211, thereby drawing the antifungal agent mist that overflows into the overflow cavity 12 into the connecting groove 211, so as to prevent the mist from overflowing further to the outside of the first housing 1.
[0058] Preferably, the exhaust component 22 is a fan.
[0059] Furthermore, such as Figure 4 and Figure 5 As shown, the sidewall of the overflow chamber 12 has several connecting holes 121. The connecting groove 211 is connected to the overflow chamber 12 through the connecting holes 121. A filter plate 212 is provided inside the connecting groove 211 so that the mist liquid overflowing into the overflow chamber 12 can be sucked into the connecting groove 211 under the action of the exhaust component 22. Furthermore, the several connecting holes 121 can form a filter screen structure on the sidewall surface of the first box 1 facing the second box 2. Together with the filter plate 212 inside the connecting groove 211, the liquid drawn into the connecting groove 211 is filtered to filter out large particulate impurities entrained in the mist liquid, thereby protecting the exhaust component 22 and preventing blockage of the pipeline during subsequent recycling of the mist liquid.
[0060] The working process of one specific embodiment of this utility model will be described below with reference to the accompanying drawings.
[0061] When performing anti-mildew operation on the product, the corresponding product can be placed on the conveyor belt. Driven by the conveyor belt, the product is sent into the overflow chamber 12 located at the front end of the first box 1. At this time, after the position sensor 15 detects that the product has entered the overflow chamber 12, it transmits a command to the control valve 132 to open after a certain time t. At the same time, the product enters the spray chamber 11 after a certain time t. At this time, the control valve 132 opens and the anti-mildew agent mist is sprayed onto the product using the nozzle 133, thus completing the spray anti-mildew process of the product.
[0062] During the process of spraying the mist onto the product by the nozzle 133, some of the mist overflows into the overflow chambers 12 on both sides. At this time, the exhaust fan 22 works to form a directional airflow from the overflow chambers 12 to the connecting groove 211, thereby drawing the mist that overflows into the overflow chambers 12 into the connecting groove 211, preventing the mist from overflowing further into the external environment of the first housing 1, and effectively reducing the impact of the anti-mildew agent mist on the external environment.
[0063] After the conveyor belt stays in the spray chamber 11 for a certain period of time, the product is sprayed with anti-mildew agent. At this time, the product is sent to the overflow chamber 12 located at the rear end of the first box 1 by the conveyor belt, and then sent out of the first box 1 from the overflow chamber 12.
[0064] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this invention, and these improvements and modifications are also considered to be within the protection scope of this utility model.
Claims
1. A mildew-proof spray device, characterized in that, include: The first housing has a spray chamber and an overflow chamber communicating with the spray chamber. The overflow chamber is located around the spray chamber, and a spray assembly is located inside the spray chamber. The second housing is connected to the outside of the first housing, and an air duct is formed inside the second housing, which is connected to the overflow cavity; the second housing is provided with an exhaust fan, which is connected to the air duct, and the exhaust fan is used to exhaust air from the overflow cavity and extract the mist that overflows into the overflow cavity.
2. The anti-mildew spray device as described in claim 1, characterized in that, At least two overflow cavities are formed, and the spray cavity is arranged in a straight line with the at least two overflow cavities, with one overflow cavity located on one side of the spray cavity and the other overflow cavity located on the other side of the spray cavity.
3. The anti-mildew spray device as described in claim 1 or 2, characterized in that, The overflow chamber and the spray chamber are separated by a partition curtain made of soft material.
4. The anti-mildew spray device as described in claim 3, characterized in that, An overflow gap is formed between the partition curtain and the inner wall of the first box, and / or an overflow gap is formed between two adjacent partition curtains.
5. The anti-mildew spray device as described in claim 1, characterized in that, A position sensor is provided on the side of the overflow chamber away from the spray chamber, and the position sensor is electrically connected to the spray assembly.
6. The anti-mildew spray device as described in claim 1, characterized in that, The spray assembly includes a connecting bracket, a control valve, and a nozzle. The connecting bracket is located on the top of the first housing, the control valve is located on the connecting bracket, the nozzle is connected to the control valve via an infusion pipeline, and the spray end of the nozzle extends into the spray chamber.
7. The anti-mildew spray device as described in claim 6, characterized in that, The connecting bracket is equipped with a lifting component, and the nozzle is connected to the lifting component. The lifting component is used to drive the nozzle to move up and down.
8. The anti-mildew spray device as described in claim 7, characterized in that, The lifting component includes a screw rod arranged vertically on the connecting bracket, the screw rod is connected to a slider, a horizontal connecting plate is abutted above the slider, the control valve is provided with a mounting plate, and the horizontal connecting plate is connected to the mounting plate.
9. The anti-mildew spray device as described in claim 1, characterized in that, The second housing has a connecting groove on its side facing the first housing, and the connecting groove is connected to the overflow cavity; The top surface of the second housing has a ventilation hole that communicates with the communicating groove. The exhaust fan is located on the outer top wall of the second housing, and the air inlet of the exhaust fan communicates with the ventilation hole.
10. The anti-mildew spray device as described in claim 9, characterized in that, The sidewall of the overflow cavity has several connecting holes, the connecting groove is connected to the overflow cavity through the connecting holes, and a filter plate is provided inside the connecting groove.