TWM599070U - Water-saving cleaning device - Google Patents

Abstract

A water-saving cleaning device for horizontal wet process equipment, including at least one tank chamber, each tank chamber includes an operating tank and an equipment tank, the spaces of the two tanks are independent of each other but with communicating through holes, and the equipment tank is provided with a filter unit, The operation tank is equipped with a cleaning unit, a pump is equipped with an inlet pipe connected to the filter unit, and a water outlet pipe connected to the cleaning unit. The cleaning water is pumped out of the equipment tank by the pump and sent to the operation tank to clean the circuit board. The filter unit is A shell, a filter basket, a filter bag and a ballast are arranged from the periphery to the center in sequence. The ballast is composed of a pressure plate and a caisson set downwards. The pressure plate has multiple water inlet holes, which are distributed in the caisson and combined with the pressure plate In the peripheral area of the position, after assembly, the aforementioned filter bag is located between the caisson and the filter basket. The washing water enters the periphery of the caisson through the water inlet hole, and then passes through the filter bag and the filter basket and is discharged from the water outlet at the bottom of the housing, so that the caisson occupies the filter The space in the basket reduces the amount of cleaning water and increases the replacement rate of the cleaning water, so as to save water and energy.

Description

Water-saving cleaning device

This creation is a technical field of cleaning devices, used in cleaning equipment for printed circuit boards, and especially refers to a design that greatly saves the usage of cleaning water.

In the horizontal wet process equipment used in the printed circuit board industry, there are a plurality of tank chambers arranged side by side in a horizontal direction. The plurality of tank chambers can be divided into chemical tank chamber, washing tank chamber, cold air drying tank chamber and Hot air blows the tank chambers, etc., and sets the number, position and sequence of each tank chamber according to the required process requirements. The washing tank chamber is used to clean the horizontally arranged printed circuit board. Each washing tank chamber includes an operation tank and an equipment tank. Adjacent operating slots can communicate with each other for the printed circuit board to enter in a horizontal manner. The equipment tank is an area where cleaning water, pipelines, and pumps are set up to supply cleaning water needed in the process to the operation tank. The cleaning water in the industry generally refers to soft water or pure water. During the cleaning process, clean cleaning water will be continuously added to the equipment tank. At the same time, the dirty cleaning water in the equipment tank will flow out in an overflow manner to achieve the replacement of the cleaning water. A certain cleaning water replacement frequency must be maintained to ensure the cleaning effect of the circuit board. The most used water in the washing tank room is washing water, and reducing the consumption of washing water is to reduce costs. However, in the conventional structure, due to the large space of the operation tank and equipment tank, it is generally 35 liters; the washing water consumption is large, The general replenishment amount is 4 liters/minute, and the frequency of cleaning water replacement is 8.7 minutes for each replacement. How to reduce the amount of cleaning water used and improve the cleaning effect is the subject of this author's research.

The main purpose of this creation is to provide a water-saving cleaning device, mainly to improve the filter unit, tank volume and tank structure, thereby reducing the amount of cleaning water used, increasing the frequency of cleaning water replacement, and achieving the purpose of saving water and energy. It also improves the cleaning effect of the circuit board.

In order to achieve the above-mentioned purpose, this creation is a water-saving cleaning device, which includes at least one tank, each tank includes an operating tank and an equipment tank. The spaces of the two tanks are independent of each other but with communicating through holes. The equipment tank is equipped with a filter. Unit, the operation tank is equipped with a cleaning unit, a pump is equipped with an inlet pipe connected to the filter unit, and an outlet pipe connected to the cleaning unit. The cleaning water in the equipment tank is pumped out by the pump and sent to the operation tank to clean the circuit board, where it is filtered The unit is provided with a shell, a filter basket, a filter bag and a ballast in sequence from the periphery to the center. The ballast is composed of a pressure plate and a caisson set downwards. The pressure plate has a plurality of water inlet holes, and the water inlet holes are distributed in the caisson. In the peripheral area of the pressure plate position, the filter bag is located between the caisson and the filter basket after assembly. The washing water enters the caisson from the water inlet and flows to the periphery of the caisson, and then flows through the filter bag and the filter basket through the water outlet at the bottom of the shell.

Furthermore, this creation is a water-saving structure of a water-saving cleaning device, which includes at least one tank chamber, each tank chamber includes an operating tank and an equipment tank, and the operating tank and the equipment tank are separated by a partition plate, so that the two tanks are separated from each other. Independent but with connected through holes, the equipment tank is equipped with a filter unit, the operation tank is equipped with a cleaning unit, a pump is equipped with a water inlet pipe connected to the filter unit, and a water outlet pipe is connected to the cleaning unit. The cleaning water is pumped out by the pump and sent to the operation tank to clean the circuit board. The bottom of the operation tank is composed of an inclined plate and a raised bottom plate. The inclined plate is inclined at an angle and is located on the side of the raised bottom plate. The highest position of the inclined plate is adjacent On the top surface of the raised bottom plate, the lowest position corresponds to the through hole, and the through hole is located in a partial area under the spacer and not in the middle position.

In the preferred embodiment of the present invention, the housing has two oppositely arranged grooves at the top position, and the pressure plate also has two protruding grooves, which can be rotated into the grooves to fix the housing and the pressure. The location of the cabin.

In the preferred embodiment of this creation, the cross-sectional area of the water inlet hole does not exceed 2 cm².

In the preferred embodiment of this creation, the bottom structure of the operating tank is composed of a sloping plate and a raised bottom plate. The raised bottom plate is set in a rack-elevated manner to reduce the internal volume of the operating tank and does not affect the operation of the cleaning unit. The inclined plate is inclined at an angle and is located on one side of the elevated bottom plate, the highest position is adjacent to the top surface of the elevated bottom plate, and the lowest position corresponds to the through hole.

In the preferred embodiment of the present invention, the top surface of the raised bottom plate is inclined downwardly away from the equipment slot.

In the preferred embodiment of the present invention, the top surface of the raised bottom plate is inclined downward toward the direction in which it meets the inclined plate.

Based on the above, this creation is a water-saving cleaning device with the following advantages: 1. The caisson design created in the filter unit uses the caisson to occupy the internal volume, thereby reducing the tank capacity and relatively increasing the replacement frequency of washing water, achieving the purpose of saving water and energy and improving the filtering effect. 2. Due to the annular water inlet hole on the inner pressure plate of the filter unit, the vortex between the water surface and the water inlet hole can be avoided when the pump is in operation. The vortex will cause the pump to inhale air and cause abnormal problems in the pump. 3. Due to the design of the raised bottom plate of the operating tank, the volume of the operating tank can also be reduced to achieve the above-mentioned water-saving and energy-saving effects. 4. The raised bottom plate and the inclined plate, both of which have a slanted design, can quickly return the washing water to the equipment tank, avoiding an alarm caused by the temporary water level drop in the equipment tank during initial operation, causing the operator to operate Trouble on the device. 5. The through hole connected between the operating tank and the equipment tank is located in a non-intermediate position. With the faster water flow guided by the inclined plate, the cleaning water enters the equipment tank through the through hole to produce an annular flow state. The relatively clean washing water overflowed from the front tank is mixed with the relatively dirty washing water from the bottom of the operation tank and then enters the filter tank for filtration to provide relatively clean washing water output to the washing unit, and the annular flow pattern also helps Since the dirty washing water is smoothly discharged from the overflow pipe, the cleanness of the washing water can be guaranteed under the condition of high replacement rate.

Figure 1 is a three-dimensional view of the creative water-saving cleaning device, and Figure 2 is a side view of the internal structure shown in Figure 1 with part of the wall panel removed. The creative water-saving cleaning device includes at least one tank chamber 1, each tank chamber 1 includes an operating tank 11 and an equipment tank 12. The two tanks are spaced independent from each other but are provided with a communicating through hole 13, so that the cleaning water in the operating tank 11 can flow back To the equipment slot 12. The operation tank 11 is provided with a cleaning unit 3 for horizontal entry of the circuit board for cleaning process operations. The cleaning unit 3 can choose either an immersion cleaning mechanism or a spray cleaning mechanism according to the requirements of the manufacturing process. Since both are conventional structures, only one of them is briefly shown in the figure, so detailed description is omitted. The equipment tank 12 is provided with a filter unit 4 and related liquid supply pipelines to provide clean washing water. In this embodiment, the washing water is soft water or pure water. Another pump 5 is provided below the tank 1. The pump 5 is provided with a water inlet pipe 51 connected to the bottom of the filter unit 4 and a water outlet pipe 52 connected to the cleaning unit 3. The pump 5 is responsible for pumping the cleaning water in the equipment tank 12 to the cleaning unit 3 in the operation tank 11, the circuit board is cleaned by the cleaning unit 3, and the cleaning water after cleaning is returned to the equipment tank 12 through the through hole 13.

The above content is the basic structure and operation mode of the tank 1, and then the various water-saving designs of this creation are explained in sequence.

The filter unit 4 is installed at the bottom of the equipment tank 12 and is responsible for filtering the washing water. The first water-saving design of this creation is to reduce the washing water usage in the filter unit 4. As shown in FIG. 3 and FIG. 4, the filter unit 4 includes a housing 41, a filter basket 42, a filter bag 43 and a ballast 44 in sequence from the periphery to the center. When in use, the housing 41 is installed at the bottom of the equipment tank 12 (as shown in FIGS. 1 and 2), and the bottom of the housing 41 has a water outlet 411 (as shown in FIG. 5). The outlet 411 is connected to the inlet pipe 51. In addition, the housing 41 has a slot 412 at two opposite positions on the top, and the slot 412 is L-shaped. The filter basket 42 is a cylinder with the mouth facing upward, and many mesh holes 421 are distributed around it. The filter bag 43 is a bag-shaped filter material through which the washing water can pass, and the material can be cotton, non-woven fabric or various filter cloths. The top of the filter bag 43 has a flange 431 for being clamped and fixed during installation. The ballast 44 is composed of a pressure plate 441 and a caisson 442 arranged downward. In this embodiment, the caisson is a hollow cylinder. The pressure plate 441 is provided with a plurality of water inlet holes 443, and the water inlet holes 443 are arranged in a ring shape and distributed in the peripheral area where the caisson 442 is combined with the pressure plate 441. In order to avoid vortexes during water intake, the water inlet hole 443 is a small hole with a cross-sectional area not exceeding 2 square centimeters (cm ² ). The pressing plate 441 is provided with a handle 444 for rotation by force, and two tenons 445 with relatively convex positions. The tenons 445 can be pressed down and rotated to enter the slot 412 during assembly.

Next, the overall assembly process of the filter unit 4 will be described: first, the filter bag 43 is placed in the filter basket 42, and then the ballast 44 is placed in the filter bag 43, the flange 431 is compressed and fixed to the pressure plate 441 and the filter basket 42 Between the tops, the caisson 442 is located in the filter bag 43 and occupies a lot of space. After that, the ballast 44 and the filter basket 42 are placed in the housing 41, and the tenon 445 is rotated into the slot 412 to complete all Assembly. As shown in Figure 5, the filter bag 43 is located between the caisson 442 and the filter basket 42 after assembly. In operation, the washing water enters the periphery of the caisson 442 through the water inlet 443, and then passes through the filter bag 43 and the mesh 421 of the filter basket 42. , And then flow out from the water outlet 411 at the bottom of the housing 41.

The focus of this creative design is to add the "water inlet 443 on the pressure plate 441" and the "caisson 442" to the filter unit 4. It has the following advantages in use: 1. The inlet holes 443 are of small diameter, multiple and distributed in a ring shape, which can prevent vortexes from being generated between the water surface and the inlet holes 443 when the pump 5 starts pumping. If the vortex is generated, the pump 5 will suck in air and cause abnormal problems. 2. The caisson 442 occupies a large amount of volume in the housing 41 to reduce the overall water storage capacity, which can help increase the replacement frequency.

Then I will explain the second design of water saving in this creation:

As shown in Figure 1 and Figure 6, in the actual use state, the cleaning device can be equipped with multiple tanks depending on the process requirements. The number of tanks is unlimited to achieve the purpose of cleaning the circuit board. In this embodiment, it is the best in the industry. Take three common tanks as an example for illustration. As shown in Figure 6, it is a schematic diagram of the internal structure shown in Figure 1 with part of the wallboard removed. In this embodiment, the water-saving cleaning device includes three tank chambers 1A, tank chambers 1B, and tank chambers 1C, each of which is 1A , 1B and 1C still include operation slots 11A, 11B, 11C and equipment slots 12A, 12B, 12C. The lower half spaces of the operation slots 11A, 11B, and 11C are not connected to each other. There is a partition plate 14 between the equipment tank 12C and the equipment tank 12B, and an overflow port 141 is provided on the partition plate 14; there is a partition plate 15 between the equipment tank 12B and the equipment tank 12A, and a partition plate 15 is provided with a Overflow port 151. In this embodiment, the equipment tank 12C is provided with a water injection pipe 16, and the equipment tank 12A is provided with an overflow pipe 17. As shown in Figure 1 and Figure 6, the circuit board is entered from the circuit board entrance 18 in the right side wall of the tank chamber 1A, and then cleaned by the cleaning unit 3 of each tank chamber, and then by the circuit board in the right wall of the tank chamber 1C The exit 19 is sent out, and then the subsequent processes are carried out.

In this creation, when the cleaning device is working, the water injection pipe 16 of the equipment tank 12C continuously injects clean cleaning water, and the cleaning water of the equipment tank 12C will overflow from the overflow 141 to the equipment tank 12B. The cleaning of the equipment tank 12B The water overflows from the overflow port 151 to the equipment tank 12A. After the equipment tank 12A is full, the water will enter and discharge from the inlet of the overflow pipe 17, reaching the "tank room 1C inlet, tank room 1A overflow discharge" "In the stable state, this design is to make the circuit board enter the operation tank 11A using the relatively dirty water for cleaning first, the circuit board enters the operation tank 11B using the relatively dirty water for cleaning, and the circuit board enters the operation tank. 11C uses relatively clean water for cleaning, which achieves the cleaning function and saves water.

In addition, as shown in Fig. 7, a perspective view of the internal structure of the cleaning unit 3 removed for this creation. The operating slot of this creation also has a water-saving structure design. Since the operating slots 11A, 11B and 11C have the same structure, only the operating slot 11A will be explained: the bottom of the operating slot 11A is composed of an inclined plate 101 and a raised bottom plate 102. The elevated bottom plate 102 adopts a high-elevation method to reduce the volume of the operating slot 11A, and the top surface of the elevated bottom plate 102 is inclined at a small angle. In this embodiment, the tilting method includes slightly tilting downwards away from the equipment slot 12A, and The direction of contact with the swash plate 101 is slightly inclined downward, but does not affect the operation of the aforementioned cleaning unit 3. The inclined plate 101 is inclined at an angle with a steep slope. The highest position is adjacent to the top surface of the raised bottom plate 102, and the lowest position corresponds to the through hole 13. The purpose is that the overflowing washing water after the cleaning unit 3 operates can use the raised bottom plate 102 The sloping plate 101 flows downward and flows back to the equipment tank 12A through the through hole 13, so that the washing water is fully used and no water will accumulate in other corners. Such a design can also increase the frequency of cleaning water replacement in the operating tank 11A. Based on the above description, the design of this creation can reduce the volume of the tank and the consumption of cleaning water. For example, the minimum volume of the tank of the conventional cleaning device is 35 liters, and this creation can be reduced to 19 liters, plus the aforementioned The caisson design of the filter unit 4 can reduce the usage by 3 liters. The actual consumption is only 16 liters. In terms of filtering efficiency, the higher the water replacement rate, the better the filtering effect. It can be seen that if the water injection port is injected with a cleaning water volume of 4 liters/minute, the conventional method will replace all the cleaning water in the tank every 8.7 minutes. ; In contrast to the design of this creation, it only takes 4 minutes to replace all the water in the tank once. If the conventional structure needs to be replaced every 4 minutes, the amount of clean water injected must reach 8.7 liters/minute, which is one more time. Times more. Therefore, the conventional cleaning device has larger capacity, more water consumption, and lower replacement frequency. The creative cleaning device has a small capacity, less water consumption, and high replacement frequency, which achieves the purpose of saving water and energy, and improves the cleaning effect of the circuit board.

Furthermore, as shown in FIG. 8, a three-dimensional schematic diagram of the flow direction of the washing water during the operation of this creation. In this creation, the through hole 13 is also improved in design. Since the structures of the tank chambers 1A, 1B, and 1C are the same, only the tank chamber 1A is described here. The operating slot 11A and the equipment slot 12A are separated by a partition plate 6. The through hole 13 is located in a partial area below the partition plate 6 and not in the middle position. In this embodiment, the intermediate partition 6 only refers to the operating slot 11A and the equipment The area where the groove 12A meets the two. This design allows the cleaning water to cooperate with the sloping plate 101 to guide and generate a faster water flow, allowing the cleaning water to enter the equipment tank 12A from the through hole 13 to produce an annular flow pattern 7, which can flow down the front tank overflow port 151 relative to The clean cleaning water is mixed with the relatively dirty cleaning water from the bottom of the operation tank 11A and then enters the filter unit 4 for filtration due to the action of the pump 5, and provides relatively clean cleaning water after filtration to be output to the cleaning unit 3; State 7 also helps the dirty washing water to be discharged from the overflow pipe 17 smoothly. In this way, the cleanness of the washing water can be ensured under the condition of high replacement rate.

As shown in Figure 9, it is a schematic diagram of the water level change after the operation of the pump 5 of this creative. In the initial state, the water level will drop from the water level line A to the water level line B. In the conventional structure, this phenomenon is prone to false alarms. The reason for this phenomenon is that the cleaning unit 3 of this embodiment is a immersion cleaning mechanism. The full water level in the tank chamber 1A is the water level line A. During initial operation, the cleaning water is first pumped from the equipment tank 12 through the pump 5 to the operation tank 11 In the soaking tank of the cleaning unit 3, the structure in the soaking tank is to accumulate water in the soaking tank and spray it to the circuit board with a nozzle or water jet for cleaning. When the water level reaches the set value, it overflows from both sides. , The overflowing cleaning water falls to the bottom of the operation tank 11A and returns to the equipment tank 12A. In the initial state, the cleaning water will not have time to be replenished, and the water level line will quickly drop to the water level line B position, but as the water injection pipe continues to replenish the cleaning water, the water level will also rise to water level A, but the process still takes a few seconds , The conventional structure will often give an alarm when the water level reaches the water level line B, so that the machine stops, which must be eliminated to operate, but this is a false alarm, which increases the trouble of operation.

In order to ensure the safety of use and avoid false alarms, the operation slot 11A is designed with a raised base plate 102 and an inclined plate 101. The bottom of the equipment slot 12A is lower than the top surface of the raised base plate 102. When the washing water drops from the washing unit 3 to the bottom of the operation tank 11A, the washing water flows to the inclined surface of the inclined plate 101 through the inclined surface of the raised bottom plate 102, and then flows back from the through hole 13 to the equipment tank 12A. Therefore, when the water level is initialized due to the above When the running state drops to the low water level line B, because the washing water can flow back quickly to raise the water level line, an alarm will not be generated immediately unless the water level continues to drop, so this design can solve this false alarm problem.

In summary, this creative water-saving cleaning device uses the caisson structure in the filter unit to reduce the amount of cleaning water used. Together with the reduction of the tank chamber volume, the usage is simultaneously reduced. This can increase the frequency of cleaning water replacement and improve The cleanliness of the washing water in the tank is conducive to cleaning the circuit board, which meets the requirements of patent application.

The above are only the preferred embodiments of the creation, and are not used to limit the scope of the embodiments of the creation. That is to say, all equal changes and modifications made in accordance with the scope of patent application for this creation are covered by the scope of patents of this creation.

1: tank room 11: Operation slot 12: device slot 13: Through hole 3: Cleaning unit 4: filter unit 41: Shell 411: water outlet 412: card slot 42: filter basket 421: Mesh 43: filter bag 431: Flange 44: Ballast 441: Pressure Plate 442: caisson 443: water inlet 444: Handle 445: Tenon 5: Pump 51: inlet pipe 52: Outlet pipe 1A, 1B, 1C: tank room 11A, 11B, 11C: operation slot 12A, 12B, 12C: equipment slot 14: divider 141: Overflow port 141 15: divider 151: Overflow port 16: water injection pipe 17: Overflow pipe 18: Circuit board entrance 19: Circuit board exit 101: inclined plate 102: Raise the bottom plate 6: Spacer 7: Annular flow regime A: Water mark B: Water level

Figure 1 is a three-dimensional view of the creation.

Figure 2 is a side view of the internal structure of the creation.

Figure 3 is a three-dimensional view of the creative filter unit.

Figure 4 is an exploded view of the creative filter unit.

Figure 5 is a cross-sectional view of the AA plane of Figure 3 and a schematic view of the flow direction of the washing water.

Figure 6 is a perspective view of the internal structure of the creation.

Figure 7 is a perspective view of the internal structure of the creative removal cleaning unit.

Figure 8 is a three-dimensional view of the direction of the washing water flow during the creative operation.

Figure 9 is a schematic diagram of the flow direction and water level of the cleaning water during the creative operation.

4: filter unit

41: Shell

412: card slot

42: filter basket

421: Mesh

43: filter bag

431: Flange

44: Ballast

441: Pressure Plate

442: caisson

443: water inlet

444: Handle

445: Tenon

Claims (11)

A water-saving cleaning device includes at least one tank chamber. Each tank chamber includes an operation tank and an equipment tank. The spaces of the two tanks are independent of each other but provided with communicating through holes. The equipment tank is provided with a filter unit, and the operation tank is provided with Cleaning unit, a pump is provided with a water inlet pipe connected to the filter unit, and a water outlet pipe connected to the cleaning unit, so that the cleaning water in the equipment tank is pumped out and sent to the cleaning circuit board in the operation tank. The filter unit is from the periphery to The center is provided with a shell, a filter basket, a filter bag and a ballast in sequence. The ballast is composed of a pressure plate and a downwardly hollow caisson. The pressure plate has a plurality of water inlet holes, and the water inlet holes are distributed in the The caisson is combined with the peripheral area of the pressure plate. After assembly, the filter bag is located between the caisson and the filter basket. The washing water enters the periphery of the caisson through the water inlet hole, and then passes through the filter bag, the filter basket and the filter basket. The water outlet at the bottom of the shell flows out. The water-saving cleaning device according to claim 1, wherein the housing has two grooves arranged facing each other at the top position, and the top of the pressure plate also has two protruding tenons, and the tenons can be rotated into the grooves Inside, fix the position of the shell and the ballast. The water-saving cleaning device according to claim 1, wherein the cross-sectional area of the water inlet hole does not exceed 2 square centimeters. The water-saving cleaning device according to claim 1, wherein the bottom of the operating tank is composed of an inclined plate and a raised bottom plate, and the raised bottom plate is set up in a rack height manner, but does not affect the operation of the cleaning unit. The inclined plate It is inclined at an angle and is located on one side of the elevated bottom plate, the highest position of the inclined plate is adjacent to the top surface of the elevated bottom plate, and the lowest position corresponds to the through hole. The water-saving cleaning device according to claim 4, wherein the top surface of the raised bottom plate is inclined downwardly away from the equipment tank. The water-saving cleaning device according to claim 4, wherein the top surface of the raised bottom plate is inclined downward toward the direction in which the inclined plate is connected. The water-saving cleaning device according to claim 1, wherein the equipment tank and the operation tank are separated by a partition plate, and the through hole is located in a partial area below the partition plate and not in an intermediate position. A water-saving cleaning device includes at least one tank chamber. Each tank chamber includes an operation tank and an equipment tank. The operation tank and the equipment tank are separated by a partition plate, so that the two tank spaces are independent of each other but provided with a communicating channel. The equipment tank is equipped with a filtering unit, the operation tank is equipped with a cleaning unit, a pump is provided with an inlet pipe connected to the filtering unit, and an outlet pipe is provided with the cleaning unit. The cleaning water in the equipment tank is The pump is pumped out and then sent to the operation tank to clean the circuit board. The bottom of the operation tank is composed of an inclined plate and a raised bottom plate. The inclined plate is inclined at an angle and is located on one side of the raised bottom plate. The position is adjacent to the top surface of the raised bottom plate, and the lowest position corresponds to the through hole, and the through hole is located in a partial area under the spacer plate and not in the middle position. The water-saving washing device according to claim 8, wherein the top surface of the raised bottom plate is inclined downwardly away from the equipment tank. The water-saving washing device according to claim 8, wherein the top surface of the raised bottom plate is inclined downward toward the direction in which the inclined plate is connected. The water-saving cleaning device according to claim 8, wherein the filter unit is sequentially provided with a shell, a filter basket, a filter bag and a ballast from the periphery to the center, and the ballast is composed of a pressure plate and a caisson set downwards, The pressure plate has a plurality of water inlet holes, and the water inlet holes are distributed in the peripheral area where the caisson is combined with the pressure plate. After assembly, the filter bag is located between the caisson and the filter basket, and the washing water is supplied by the water inlet The hole enters the periphery of the caisson, then passes through the filter bag, and the filter basket flows out from the water outlet at the bottom of the shell.

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