CN219526336U - Tank-type filtering device - Google Patents

Abstract

The present utility model relates to a tank-type filter device. The tank-type filtering device comprises a filtering tank, a filtering membrane group and a pressure regulating device, wherein the filtering membrane group is arranged in the filtering tank, the pressure regulating device is arranged on the filtering tank and used for regulating the pressure in the filtering tank, the pressure regulating device comprises a pressure regulating pipe and a control valve, one end of the pressure regulating pipe is communicated with a filtering cavity in the filtering tank, the other end of the pressure regulating pipe is communicated with an external space outside the filtering cavity, and the control valve is arranged on the pressure regulating pipe and used for controlling the opening and closing of a pipeline. When the tank type filtering device is under the working condition that pressure is required to be relieved, the control valve opens the pipeline of the pressure regulating pipe to relieve pressure, and when the tank type filtering device is under the working condition that pressure is required to be increased or is airtight, the control valve closes the pipeline of the pressure regulating pipe to realize pressure increase, so that the tank type filtering device can meet the requirements of different working conditions and processes on the pressure in the tank, and the process adaptability of the tank type filtering device is effectively improved.

Description

Tank-type filtering device

Technical Field

The utility model relates to the technical field of filter devices, in particular to a tank-type filter device.

Background

The conventional tank type filtering device is generally of a sealed pressurizing type, a booster pump is required to be arranged, the energy consumption is high during use, the tank body is of a sealed pressurizing type, various process requirements and working condition changes are difficult to adapt, for example, the tank body pressure caused by water inlet of an empty tank is too high, and therefore the conventional tank type filtering device is difficult to realize the conversion of the tank type filtering device in a low-pressure type working mode and a pressurizing type working mode according to the process requirements.

Disclosure of Invention

Based on this, it is necessary to provide a tank-type filter device, aiming at realizing a tank-type filter device with a strong process adaptability.

A tank-type filtering device, which comprises a filtering tank, a filtering membrane group and a pressure regulating device; wherein, the liquid crystal display device comprises a liquid crystal display device,

a filter cavity is formed in the filter tank, and the filter tank is provided with a water inlet interface, a water production interface and an air inlet interface;

the filtering membrane group comprises a filtering membrane component, a water producing pipe and a gas washing pipe, wherein the filtering membrane component is arranged in the filtering cavity, the filtering membrane component is provided with a water producing port and a gas inlet, one end of the water producing pipe is communicated with the water producing port, the other end of the water producing pipe is arranged at the water producing port and communicated with the outside of the filtering cavity, one end of the gas washing pipe is communicated with the gas inlet, and the other end of the gas washing pipe is arranged at the gas inlet and communicated with the outside of the filtering cavity;

the pressure regulating device is arranged on the filter tank and used for regulating the pressure in the filter tank, the pressure regulating device comprises a pressure regulating pipe and a control valve, the pressure regulating pipe is communicated with the outer space outside the filter cavity, and the control valve is arranged on the pressure regulating pipe and used for controlling the opening and closing of a pipeline.

In one embodiment, the control valve is a multiplex valve.

In one embodiment, the filtering tank comprises an upper cover, a tank body and a lower cover, wherein the upper cover, the tank body and the lower cover jointly form a filtering cavity, and the tank body is provided with a water inlet interface, a water production interface and an air inlet interface, and further comprises at least one of the following:

the upper cover is detachably connected with the tank body;

the lower cover is detachably connected with the tank body.

In one embodiment, at least one of the following is also included:

the upper cover is provided with a first maintenance opening and a first cover body sealed on the first maintenance opening;

the lower cover is provided with a second maintenance opening and a second cover body sealed on the second maintenance opening.

In one embodiment, the lower cover is provided with a drain pipe, and the drain pipe is provided with a drain valve.

In one embodiment, a first air inlet interface and a first water producing interface are formed on the inner wall, close to the upper cover, of the tank body, a second air inlet interface and a second water producing interface are formed on the inner wall, close to the lower cover, of the tank body, and the first air inlet interface, the first water producing interface, the second air inlet interface and the second water producing interface are configured with a sealing plug when not communicated with the water producing pipe or the air washing pipe.

In one embodiment, the water producing pipe is disposed at the first water producing port, and the air washing pipe is disposed at the first air inlet port.

In one embodiment, the water producing pipe is disposed at the second water producing port, and the air washing pipe is disposed at the second air inlet port.

In one embodiment, the water producing pipe is disposed at the first water producing port, and the air washing pipe is disposed at the second air inlet port.

In one embodiment, the filtering membrane group is provided with a plurality of filtering membrane components, the water production pipe comprises a water production main pipe and a water production branch pipe, one end of the water production branch pipe is communicated with the water production port, the other end of the water production branch pipe is communicated with the water production main pipe, and the water production main pipe is arranged at the water production port and communicated with the outside of the filtering cavity; the air washing pipe comprises an air washing main pipe and air washing branch pipes, one ends of the air washing branch pipes are communicated with the air inlet, the other ends of the air washing branch pipes are communicated with the air washing main pipe, and the air washing main pipe is arranged at the air inlet interface and communicated with the outside of the filter cavity.

According to the tank-type filtering device, the water producing port and the air inlet port are formed in the filtering tank so as to be communicated with the water producing pipe and the air washing pipe, so that the arrangement of the water producing pipe is effectively simplified, and the later maintenance, replacement and installation are facilitated; when the tank type filtering device is under the working condition that needs to be decompressed, the pipeline of the pressure regulating pipe can be opened through the control valve to decompress, and when the tank type filtering device is under the working condition that needs to be pressurized or airtight, the pipeline of the pressure regulating pipe can be closed through the control valve to realize the pressurization, so that the tank type filtering device can meet the requirements of different working conditions and technologies on the pressure in the tank, and the technological adaptability of the tank type filtering device is effectively improved.

Drawings

Fig. 1 is a schematic view showing an internal structure of a water generating pipe and an air washing pipe of a tank type filtering device in an embodiment of the present utility model, which are located at an upper portion of a tank.

Fig. 2 is a schematic view showing an internal structure of a tank filter device according to an embodiment of the present utility model, in which a water generating pipe is located at an upper portion of a tank body and a gas washing pipe is located at a lower portion of the tank body.

Fig. 3 is a schematic view showing an internal structure of a water generating pipe and an air washing pipe of a tank type filtering device according to an embodiment of the present utility model, which are located at a lower portion of a tank.

Fig. 4 is a schematic view showing an internal structure of the water inlet of the tank-type filtering device in the upper cover according to an embodiment of the utility model.

Fig. 5 is a schematic diagram illustrating an internal structure of a pressure regulating device of a tank-type filtering device according to an embodiment of the present utility model, which is separately disposed from a first maintenance opening.

Fig. 6 is a schematic view showing an internal structure of a maintenance-free port of a tank type filtering apparatus according to an embodiment of the present utility model.

Fig. 7 is a schematic view of an inner structure of a tank-type filtering device according to an embodiment of the present utility model, in which a first maintenance opening is provided on an upper cover and a second maintenance opening is provided on a lower cover.

Fig. 8 is a schematic view showing an internal structure of a tank-type filtering device according to an embodiment of the utility model, in which an upper cover and a lower cover are detachably connected.

Reference numerals illustrate:

1000. a tank-type filter device; 100. a filter tank; 110. a filter chamber; 120. an upper cover; 121. a first maintenance opening; 122. a first cover; 130. a tank body; 140. a lower cover; 141. a second maintenance opening; 142. a second cover; 150. a water inlet port; 160. a blow-down pipe; 161. a blow-down valve; 200. a filtration membrane group; 210. a filtration membrane module; 220. a water producing pipe; 221. a water producing main pipe; 222. a water producing branch pipe; 230. a gas wash pipe; 231. a gas washing main pipe; 232. a gas washing branch pipe; 300. a pressure regulating device; 310. a pressure regulating tube; 320. a control valve; 400. a fixing member; 500. and a support.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that, if any, these terms "upper," "lower," "top," "bottom," "inner," "outer," and the like are used in the description of the present utility model with respect to the orientation or positional relationship shown in the drawings for convenience of description and to simplify the description, but do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "upper", "lower", "left", "right", and the like, as used herein, are for illustrative purposes only and do not represent the only embodiment.

Referring to fig. 1, fig. 1 is a schematic diagram illustrating a canister filter 1000 according to an embodiment of the utility model. The tank type filtering apparatus 1000 includes a filtering tank 100, a filtering membrane group 200, and a pressure regulating apparatus 300. The filter tank 100 is internally provided with a filter cavity 110, and the filter tank 100 is provided with a water inlet interface 150, a water production interface and an air inlet interface. The water inlet 150 may be provided at an upper, middle or lower portion of the filter tank 100, which is not particularly limited herein. The water-producing port may be provided at an upper, middle or lower portion of the filter tank 100, which is not particularly limited herein. The air inlet port may be provided at an upper, middle or lower portion of the filter tank 100, which is not particularly limited herein. The number of the water inlet port 150, the air inlet port and the water producing port may be 1 or more, and is not particularly limited herein. The water inlet port 150 is disposed on the upper cover 120, the filtering membrane set 200 includes a filtering membrane module 210, a water producing pipe 220 and an air washing pipe 230, the filtering membrane module 210 is disposed in the filtering cavity 110, the filtering membrane module 210 has a water producing port and an air inlet, one end of the water producing pipe 220 is communicated with the water producing port, the other end of the water producing pipe 220 is disposed on the outside of the water producing port communicated with the filtering cavity 110, one end of the air washing pipe 230 is communicated with the air inlet, and the other end of the air washing pipe 230 is disposed on the outside of the air inlet port communicated with the filtering cavity 110. The filtration membrane module 210 may be other filtration membrane modules 210 such as an ultrafiltration membrane module and a nanofiltration membrane module, and is not particularly limited herein. Raw water is delivered to the filter cavity 110 through the water inlet interface 150, the water producing pipe 220 is used for discharging purified water, the air washing pipe 230 is externally connected with aeration equipment and introduces pressurized air flow into the filter membrane component 210, so that the pressurized air flow and the raw water generate bubbles and wash out other impurities such as sludge on the filter membrane component 210.

The pressure regulating device 300 is disposed on the filter tank 100, and is used for regulating the pressure in the filter tank 100, the pressure regulating device 300 includes a pressure regulating pipe 310 and a control valve 320, one end of the pressure regulating pipe 310 is communicated with the filter cavity 110 and an external space outside the filter cavity 110, and the control valve is mounted on the pressure regulating pipe 310 and is used for controlling the opening and closing of the pipeline. By the arrangement, the water producing port and the air inlet port are formed in the filtering tank 100 so as to be communicated with the water producing pipe 220 and the air washing pipe 230, so that the arrangement of the water producing pipe 220 is effectively simplified, and the later maintenance, replacement and installation are facilitated; when the tank type filtering device 1000 is in the working condition requiring pressure relief, the pipeline of the pressure regulating pipe 310 can be opened through the control valve to relieve pressure, and when the tank type filtering device 1000 is in the working condition requiring pressure boost or sealing, the pipeline of the pressure regulating pipe 310 can be closed through the control valve to realize pressure boost, so that the tank type filtering device 1000 can meet the requirements of different working conditions and technologies on the pressure in the tank, and the technological adaptability of the tank type filtering device 1000 is effectively improved.

Preferably, the pressure regulating device 300 allows the tank filter apparatus 1000 to accommodate a variety of conditions. When the tank type filter 1000 is higher than the water producing tank in topography, the control valve 320 opens the pressure regulating pipe 310, the tank type filter 1000 is changed into a top open type low pressure type filter, the produced water can be naturally conveyed to the water producing tank by utilizing the water head advantage and gravitational potential energy, a booster pump is not needed, and the energy consumption is effectively saved; when the tank-type filtering device 1000 needs to be in a high-pressure operation condition, the control valve 320 closes the pressure regulating pipe 310, so that the filtering tank 100 can be a pressurized closed container; when the tank type filtering device 1000 is filled with water in an empty tank state, the control valve 320 opens the pressure regulating pipe 310 to discharge air, so that the pressure inside and outside the tank is balanced, and water is smoothly filled; when the pressure in the tank of the tank type filtering device 1000 is high, the control valve 320 opens the pressure regulating pipe 310 to release pressure; when the sewage disposal basin is higher than the sewage disposal outlet of the tank type filtering apparatus 1000, the control valve 320 opens the pressure regulating pipe 310 and the pressure regulating pipe 310 is connected with the aeration device, and the pressure in the filtering tank 100 is increased by the pressure regulating apparatus 300 to drain sewage into the sewage disposal basin.

Preferably, the control valve 320 is a multi-way valve, and the pressure regulating device 300 further includes a pressure sensor, and the pressure sensor is communicatively connected to the control valve 320. This arrangement allows the canister 100 to be maintained at a safe pressure and also allows the threshold of the trigger control valve 320 to be set to control the canister 100 to be maintained at a set pressure.

Specifically, the filter tank 100 includes an upper cover 120, a tank body 130, and a lower cover 140, where the upper cover 120, the tank body 130, and the lower cover 140 together form a filter cavity 110, and the tank body 130 is provided with a water inlet interface 150, a water producing interface, and an air inlet interface, and further includes at least one of the following: the upper cover 120 is detachably connected with the tank 130; the lower cover 140 is detachably connected with the tank 130. The detachable connection may be a threaded connection, a snap connection, a turnbuckle connection, or other sealing detachable connection modes, which are not particularly limited herein. The upper cover 120, the can 130 and the lower cover 140 are hermetically connected. For example, referring to fig. 1 to 7, the upper cover 120 of the tank-type filtering apparatus 1000 is detachably connected to the tank 130, and the lower cover 140 of the tank-type filtering apparatus 1000 is integrally formed with the tank 130. So set up, through the detachable connection mode between upper cover 120 and jar body 130 and the detachable connection mode between lower cover 140 and jar body 130 for filter jar 100 can change upper cover 120, jar body 130 or lower cover 140 that have different subassemblies in order to satisfy different operating modes and technology and to jar type filter equipment 1000 subassembly, interface position, filter chamber 110 size, etc. requirement, and can change filter chamber 110 size, in order to hold filter membrane subassembly 210 of different quantity, adapt to different purified water volume requirements, further promote jar type filter equipment 1000's technology adaptability.

Further, referring to fig. 2 and 3, the tank-type filtering apparatus 1000 further includes a fixing member 400, where the fixing member 400 is used to fix the filtering membrane set 200 to the middle of the filtering chamber 110, so that the filtering membrane set 200 has the largest contact area with the raw water to be filtered; the tank type filtering apparatus 1000 further includes a support 500 for supporting the tank type filtering apparatus 1000.

For example, referring to fig. 1, the pressure regulating device 300 is disposed on the upper cover 120; the lower cover 140 is provided with a drain pipe 160, and the drain pipe 160 is provided with a drain valve 161.

Specifically, referring to fig. 4 to 7, at least one of the following is further included: the upper cover 120 is provided with a first maintenance opening 121 and a first cover 122 sealed on the first maintenance opening 121; the lower cover 140 is provided with a second maintenance opening 141 and a second cover 142 sealed to the second maintenance opening 141. The opening sizes of the first and second maintenance openings 121 and 141 are set according to the size of the canister 100, and are not particularly limited herein. The pressure adjusting device 300 may be disposed on the first cover 122 or the upper cover 120, which is not limited herein. Preferably, referring to fig. 5, the first maintenance port 121 and the pressure regulating device 300 are separately disposed, so that the tank 130 can independently open the first cover 122 and enter the first maintenance port 121 without disassembling the pipeline of the pressure regulating device 300 when the filter device is maintained through the first maintenance port 121 in the later period.

The connection between the tank 130 and the upper and lower covers 120 and 140, and the opening or closing of the first and second maintenance openings 121 and 141, and the opening size may be determined according to the size of the filter tank 100 of the tank-type filter apparatus 1000. Referring to fig. 6, fig. 6 is a schematic diagram illustrating an internal structure of a small maintenance-free port of a tank-type filtering device 1000 according to an embodiment of the utility model, the filtering tank 100 is small in size, the upper cover 120 and the tank 130 are detachably connected, and the first maintenance port 121 is not needed, so that maintenance can be performed on the inside of the tank 130 only by directly opening the upper cover 120, which is beneficial to simplifying the structure of the filtering tank 100, reducing the processing difficulty of the filtering tank 100 and reducing the cost. Referring to fig. 7, fig. 7 shows a schematic diagram of an internal structure of a tank filter device 1000 according to an embodiment of the utility model, in which a maintenance opening is formed in each of a large-sized upper cover 120 and a large-sized lower cover 140, a filter tank 100 is larger in size, a tank body 130 is detachably connected to the upper cover 120, a first maintenance opening 121 and a second maintenance opening 141 are formed, the first maintenance opening 121 is opened when the upper portion of the tank body 130 is maintained, and the second maintenance opening 141 is opened when the lower portion of the tank body 130 is maintained. Referring to fig. 8, fig. 8 shows a schematic diagram of an internal structure of a tank-type filtering apparatus 1000 according to an embodiment of the utility model, in which a large upper cover 120 and a lower cover 140 are detachably connected, and a first maintenance opening 121 and a second maintenance opening 141 are provided, so that the large tank-type filtering apparatus 1000 has high manufacturing cost, and the use of the detachable connection method to provide the filtering tank 100 and two maintenance openings is beneficial to the replacement of the upper cover 120, the tank body 130 and the lower cover 140 and the maintenance of the filtering tank 100.

Specifically, the filtering membrane set 200 has a plurality of filtering membrane modules 210, the water producing pipe 220 includes a water producing main 221 and a water producing branch 222, one end of the water producing branch 222 is communicated with a water producing port, the other end is communicated with the water producing main 221, and the water producing main 221 is arranged outside the water producing port communicated with the filtering cavity 110; the air washing pipe 230 includes an air washing header pipe 231 and air washing branch pipes 232, one end of each air washing branch pipe 232 is communicated with the air inlet, the other end of each air washing branch pipe 232 is communicated with the air washing header pipe 231, and the air washing header pipe 231 is arranged outside the filter cavity 110 and communicated with the air inlet interface.

Specifically, a first air inlet port and a first water producing port are formed on an inner wall of the tank 130, which is close to the upper cover 120, and a second air inlet port and a second water producing port are formed on an inner wall of the tank 130, which is close to the lower cover 140, and the first air inlet port, the first water producing port, the second air inlet port and the second water producing port are configured with a sealing plug when not communicated with the water producing pipe 220 or the air washing pipe 230.

For example, referring to fig. 1, a water producing pipe 220 is disposed at the first water producing port, and a gas washing pipe 230 is disposed at the first gas inlet port. So arranged, the water producing pipe 220 and the air washing pipe 230 are both close to the upper cover 120 and the first maintenance opening 121 arranged on the upper cover 120, so that maintenance is facilitated; referring to fig. 2, a water producing pipe 220 is disposed at the first water producing port, and a gas washing pipe 230 is disposed at the second gas inlet port. The arrangement can shorten the path of the aeration pipeline and improve the aeration efficiency of the filtering membrane component 210; referring to fig. 3, the water producing pipe 220 is disposed at the second water producing port, and the air washing pipe 230 is disposed at the second air inlet port. The arrangement can fully utilize gravitational potential energy to purify raw water, save energy consumption, shorten the formation of an aeration pipeline and improve the aeration efficiency of the filtering membrane component 210.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A canister filter device, the canister filter device comprising:

the filter tank is internally provided with a filter cavity, and is provided with a water inlet interface, a water production interface and an air inlet interface;

the filtering membrane assembly comprises a filtering membrane assembly, a water producing pipe and a gas washing pipe, the filtering membrane assembly is arranged in the filtering cavity, the filtering membrane assembly is provided with a water producing port and a gas inlet, one end of the water producing pipe is communicated with the water producing port, the other end of the water producing pipe is arranged at the water producing port and communicated with the outside of the filtering cavity, one end of the gas washing pipe is communicated with the gas inlet, and the other end of the gas washing pipe is arranged at the gas inlet port and communicated with the outside of the filtering cavity;

the pressure regulating device is arranged on the filter tank and used for regulating the pressure in the filter tank, the pressure regulating device comprises a pressure regulating pipe and a control valve, the pressure regulating pipe is communicated with the outer space outside the filter cavity, and the control valve is arranged on the pressure regulating pipe and used for controlling the opening and closing of a pipeline.

2. The canister filter set of claim 1, wherein the control valve is a multiple way valve.

3. The tank filter according to claim 1, wherein the filter tank comprises an upper cover, a tank body and a lower cover, the upper cover, the tank body and the lower cover together form a filter cavity, the tank body is provided with a water inlet interface, a water production interface and an air inlet interface, and the tank further comprises at least one of the following:

the upper cover is detachably connected with the tank body;

the lower cover is detachably connected with the tank body.

4. A canister filter according to claim 3, further comprising at least one of:

the upper cover is provided with a first maintenance opening and a first cover body sealed on the first maintenance opening;

the lower cover is provided with a second maintenance opening and a second cover body sealed on the second maintenance opening.

5. A canister filter according to claim 3, wherein the lower cover is provided with a drain pipe, and the drain pipe is provided with a drain valve.

6. The tank-type filtering device according to claim 3, wherein a first air inlet port and a first water producing port are formed in an inner wall, close to the upper cover, of the tank body, a second air inlet port and a second water producing port are formed in an inner wall, close to the lower cover, of the tank body, and the first air inlet port, the first water producing port, the second air inlet port and the second water producing port are provided with a sealing plug when the water producing pipe or the air washing pipe is not communicated.

7. The tank filter arrangement according to claim 6, wherein the water producing pipe is arranged at the first water producing port and the gas wash pipe is arranged at the first gas inlet port.

8. The tank filter arrangement according to claim 6, wherein the water producing pipe is arranged at the second water producing port and the gas wash pipe is arranged at the second gas inlet port.

9. The tank filter arrangement according to claim 6, wherein the water producing pipe is arranged at the first water producing port and the gas wash pipe is arranged at the second gas inlet port.

10. The tank-type filtering device according to claim 1, wherein the filtering membrane group is provided with a plurality of filtering membrane components, the water producing pipe comprises a water producing main pipe and a water producing branch pipe, one end of the water producing branch pipe is communicated with the water producing port, the other end of the water producing branch pipe is communicated with the water producing main pipe, and the water producing main pipe is arranged outside the water producing port and communicated with the filtering cavity; the air washing pipe comprises an air washing main pipe and air washing branch pipes, one ends of the air washing branch pipes are communicated with the air inlet, the other ends of the air washing branch pipes are communicated with the air washing main pipe, and the air washing main pipe is arranged at the air inlet interface and communicated with the outside of the filter cavity.