Material filter press device

Abstract

The present application relates to the field of filtering devices, and in particular to a material filter press device, including a high water level water tank, a low water level sedimentation tank, and a floating filter plate, wherein the high water level water tank is located on one side of the low water level sedimentation tank, the bottom of the high water level water tank is connected to the bottom of the low water level sedimentation tank, the low water level sedimentation tank is located in the middle and lower part of the high water level water tank, the floating filter plate is horizontally arranged inside the low water level sedimentation tank, and the edge of the floating filter plate is slidably connected to the inner wall of the low water level sedimentation tank in the vertical direction. The floating filter plate continuously filters the water in the low water level sedimentation tank, and at the same time, the water is precipitated in the low water level sedimentation tank, and the water in the low water level sedimentation tank always passes through the floating filter plate upward, and the material filtered from the lower surface of the floating filter plate can be stably attached to the lower surface of the floating filter plate, avoiding the material after attachment and precipitation and the material in the attachment and precipitation process from being dispersed, which is helpful for the material precipitation and filtration in the water body below the floating filter plate in the low water level sedimentation tank, and improves the filtering and sedimentation efficiency.

Description

Technical Field

[0001] The present application relates to the field of filtering devices, and in particular to a material filter press device. Background Art

[0002] In the process of purifying large amounts of sewage, sedimentation tanks are usually used for preliminary purification, followed by further filtration and disinfection.

[0003] During the sedimentation and purification process, some materials in the sewage will be suspended in the water body. Although some chemical reagents can make some suspended materials flocculate and precipitate, there are still some fine suspended materials. These suspended materials are usually filtered by filters. However, due to the large processing volume, the filter replacement cycle is very short, and the filter needs to be replaced and cleaned frequently. After filtering for a period of time, the filter becomes clogged, resulting in reduced filtration efficiency. Summary of the invention

[0004] In view of this, a material filter press device is proposed to improve the filtration and sedimentation efficiency.

[0005] The present application provides a material filter press device, comprising a high water level water tank, a low water level sedimentation tank, and a floating filter plate, wherein the high water level water tank is located on one side of the low water level sedimentation tank, the bottom of the high water level water tank is connected to the bottom of the low water level sedimentation tank, the low water level sedimentation tank is located in the middle and lower part of the high water level water tank, the floating filter plate is horizontally arranged inside the low water level sedimentation tank, and the edge of the floating filter plate is slidably connected to the inner wall of the low water level sedimentation tank along the vertical direction.

[0006] In some embodiments of the above-mentioned material filter pressing device, the material filter pressing device further includes a counterweight block, and the counterweight block is connected to the floating filter plate.

[0007] In some embodiments of the above material filter press device, the counterweight block is spherical in shape and is located below the center of the floating filter plate.

[0008] In some embodiments of the above-mentioned material filter press device, the material filter press device also includes a plurality of traction ropes, one end of each of the traction ropes is evenly distributed on the lower surface of the floating filter plate and fixedly connected to the lower surface of the floating filter plate, and the other end of each of the traction ropes is fixedly connected to the counterweight block.

[0009] In some embodiments of the above-mentioned material filter press device, the material filter press device also includes a limit block, which is fixedly connected to the inner wall of the low water level sedimentation tank, and the edge of the floating filter plate is located above the limit block. After the floating filter plate moves downward, it can abut against the limit block, and the distance between the lower surface of the counterweight block and the bottom surface of the low water level sedimentation tank is smaller than the distance between the upper surface of the limit block and the bottom surface of the low water level sedimentation tank.

[0010] In some embodiments of the above-mentioned material filtration device, the material filtration device also includes a damping partition net, which is horizontally arranged inside the high water level water tank, and the edge of the damping partition net is fixedly connected to the inner wall of the high water level water tank, and the damping partition net is on the same horizontal plane as the limit block, and the damping partition net is composed of a plurality of nets arranged at equal intervals in the vertical direction.

[0011] In some embodiments of the above-mentioned material filter press device, the bottom surface of the high water level water tank is higher than the bottom surface of the low water level sedimentation tank, and a connecting port is provided on a side of the high water level water tank close to the low water level sedimentation tank, and the bottom edge of the connecting port is located on the bottom surface of the high water level water tank, and the top edge of the connecting port is lower than the lower surface of the floating filter plate.

[0012] In some embodiments of the above-mentioned material filtration device, an inclined plate is fixedly connected between the bottom edge of the connecting port and the bottom surface of the low water level sedimentation tank, the side of the inclined plate close to the high water level water tank is higher than the other side, the bottom edge of the high water level water tank and the bottom surface of the low water level sedimentation tank are located on the same horizontal plane, and the bottom edge of the high water level water tank and the bottom edge of the inclined plate surround a filling tank with an opening facing downward.

[0013] In some embodiments of the above-mentioned material filter press device, a sewage outlet is provided on the side of the low water level sedimentation tank away from the high water level water tank, the sewage outlet is located below the floating filter plate, the bottom edge of the sewage outlet is located on the bottom surface of the low water level sedimentation tank, and a sewage valve is provided inside the sewage outlet.

[0014] In some embodiments of the above-mentioned material filter press device, a water outlet is provided on a side of the low water level sedimentation tank away from the high water level water tank, the water outlet is located above the floating filter plate, and a water outlet valve is provided inside the water outlet.

[0015] Beneficial effects of the present invention:

[0016] During the entire working process, the floating filter plate continuously filters the water in the low water level sedimentation tank, and the water is precipitated in the low water level sedimentation tank. During the filtration process, the water in the low water level sedimentation tank always passes through the floating filter plate upward, and the material filtered from the lower surface of the floating filter plate can be stably attached to the lower surface of the floating filter plate. There is no downward water flow to flush the material attached to the lower surface of the floating filter plate or to flush the material settled on the bottom of the low water level sedimentation tank, or to disturb the water body of the low water level sedimentation tank under the floating filter plate, so as to avoid the materials after attachment and sedimentation and the materials in the attachment and sedimentation process from being dispersed, which is helpful for the sedimentation and filtration of the materials in the water body of the low water level sedimentation tank under the floating filter plate, and improves the filtration and sedimentation efficiency.

[0017] When the floating filter plate moves downward to the lowest position, the water below the floating filter plate no longer passes through the floating filter plate upward, and the attached materials fall off and sink under their own weight. At this time, the high water level tank is being filled with water again, which provides time for the attached materials to fall off and settle.

[0018] The floating filter plate separates the water in the low-water-level sedimentation tank into the lower layer of sewage and the upper layer of clean water. During the whole process, the upper layer of clean water does not flow back downward, and the sewage in the lower layer always passes through the floating filter plate from the top layer, and the flow direction is stable and upward, which is not easy to interfere with the downward sedimentation of materials. In addition, during the descent of the floating filter plate, the speed at which the lower layer of water passes through the floating filter plate upward is the combined speed of the water's upward flow and the floating filter plate's downward movement. The actual speed of the water flowing upward is less than the speed of the water relative to the floating filter plate when it passes through the floating filter plate, and the floating filter plate moves downward to achieve filter press.

[0019] Compared with the prior art in which a vertical filter screen is arranged on one side of the sedimentation tank, the low water level sedimentation tank in the present application has a smaller water depth and a larger filtering area. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.

[0021] Figure 1 It is a structural schematic diagram of a material filter press device in an embodiment of the present application;

[0022] Figure 2 yes Figure 1 A-direction view;

[0023] Figure 3 yes Figure 1 B-direction view;

[0024] Figure 4 is a schematic diagram of the structure when the high water level tank is filled with water in an embodiment of the present application;

[0025] Figure 5 It is a schematic diagram of the structure when the floating filter plate in the embodiment of the present application rises to the highest position;

[0026] Figure 6 It is a schematic diagram of the structure of the floating filter plate in the embodiment of the present application when it descends under the condition of a liquid level difference;

[0027] Figure 7 is a schematic structural diagram of the floating filter plate in the embodiment of the present application when it descends without a liquid level difference;

[0028] Figure 8 It is a schematic diagram of the structure when the floating filter plate in the embodiment of the present application is lowered to the lowest position;

[0029] Fig. 9 It is a schematic diagram of the structure in which the floating filter plate in the embodiment of the present application is connected to the inner wall of the low water level sedimentation tank through a frame.

[0030] Description of reference numerals:

[0031] 100. Frame; 102. Sealing ring; 104. Water pipe; 106. High water level water tank; 108. Low water level sedimentation tank; 110. Floating filter plate; 112. Counterweight block; 114. Towing rope; 116. Limit block; 118. Damping separation net; 120. Connecting port; 122. Filling tank; 124. Sewage outlet; 126. Sewage valve; 128. Water outlet; 130. Water outlet valve; 132. Inclined plate. DETAILED DESCRIPTION

[0032] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same figure numbers in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings need not be drawn to scale unless otherwise specified. The special word "exemplary" here means "used as an example, embodiment or illustrative". Any embodiment described here as "exemplary" is not necessarily interpreted as being superior to or better than other embodiments. In addition, in order to better illustrate the present application, those skilled in the art should understand that numerous specific details are given in each embodiment below. Without certain specific details, the present application can also be implemented. In some embodiments, methods, means and elements well known to those skilled in the art are not described in detail to highlight the subject matter of the present application.

[0033] Combination Figures 1 to 3 As shown, an embodiment of the present application provides a material filter press device, including a high water level tank 106, a low water level sedimentation tank 108, and a floating filter plate 110. The high water level tank 106 is located on one side of the low water level sedimentation tank 108, and the bottom of the high water level tank 106 is connected to the bottom of the low water level sedimentation tank 108. The low water level sedimentation tank 108 is located in the middle and lower part of the high water level tank 106. The floating filter plate 110 is horizontally arranged inside the low water level sedimentation tank 108, and the edge of the floating filter plate 110 is slidably connected to the inner wall of the low water level sedimentation tank 108 along the vertical direction.

[0034] Combination Figure 4As shown, after water is injected into the high water level tank 106, the water flows into the low water level sedimentation tank 108 through the bottom connecting position. When the liquid level difference between the high water level tank 106 and the low water level sedimentation tank 108 is large (for example, when the high water level tank 106 is full of water), the water pressure force pushes the floating filter plate 110 to rise, and at the same time, the water in the low water level sedimentation tank 108 is filtered through the floating filter plate 110. The filtered clean water is above the floating filter plate 110, and the sewage is below the floating filter plate 110.

[0035] Combination Figure 5 As shown, the water in the high water level tank 106 continuously flows into the low water level sedimentation tank 108, the water level in the high water level tank 106 decreases, and the water level in the low water level sedimentation tank 108 increases. When the water pressure force generated by the water level difference is balanced with the weight of the floating filter plate 110, the floating filter plate 110 rises to the highest position and no longer continues to rise.

[0036] Combination Figure 6 As shown, the water level difference between the high water level tank 106 and the low water level sedimentation tank 108 is further reduced, and the water pressure force generated by the water level difference is smaller than the weight of the floating filter plate 110, so the floating filter plate 110 descends.

[0037] Combination Figure 7 As shown, the water levels in the high water level tank 106 and the low water level sedimentation tank 108 finally reach the same level, and the floating filter plate 110 continues to descend by its own weight.

[0038] Combination Figure 8 As shown, the floating filter plate 110 finally drops to the lowest position, at which time clean water is pumped out or discharged from above the floating filter plate 110, and then the high water level tank 106 is filled with water again, and the operation is circulated in this way.

[0039] During the whole process, the floating filter plate 110 continuously filters the water in the low-water-level sedimentation tank 108, and the water is precipitated in the low-water-level sedimentation tank 108. During the filtering process, the water in the low-water-level sedimentation tank 108 always passes through the floating filter plate 110 upwards, and the material filtered from the lower surface of the floating filter plate 110 can be stably attached to the lower surface of the floating filter plate 110. There is no downward water flow to flush the material attached to the lower surface of the floating filter plate 110 or to flush the material precipitated on the bottom surface of the low-water-level sedimentation tank 108, or to disturb the water body of the low-water-level sedimentation tank 108 below the floating filter plate 110, so as to avoid the materials after attachment and precipitation and the materials in the attachment and precipitation process from being dispersed, which is helpful for the precipitation and filtration of the materials in the water body below the floating filter plate 110 of the low-water-level sedimentation tank 108, thereby improving the filtration and sedimentation efficiency.

[0040] When the floating filter plate 110 moves downward to the lowest position, the water below the floating filter plate 110 no longer passes through the floating filter plate 110 upward, and the attached materials fall off and sink under the action of their own weight. At this time, the high water level tank 106 is in the stage of being filled with water again, which provides time for the attached materials to fall off and settle.

[0041] The floating filter plate 110 separates the water in the low-water-level sedimentation tank 108 into the lower layer of sewage and the upper layer of clean water. During the whole process, the upper layer of clean water does not flow back downward, and the sewage in the lower layer always passes through the floating filter plate 110 from the top layer, and the flow direction is stable and upward, which is not easy to interfere with the downward sedimentation of materials. In addition, during the descent of the floating filter plate 110, the speed at which the lower layer of water passes through the floating filter plate 110 upward is the combined speed of the speed at which the water flows upward and the speed at which the floating filter plate 110 moves downward. Taking the case where the liquid level difference is zero as an example, at this time, the floating filter plate 110 continues to descend, the speed at which the water flows upward approaches zero, and the floating filter plate 110 moves downward to achieve filter pressing. It should be understood that when the liquid level difference is zero, it is the stage where the filter pressing effect is best, and the filter pressing stage has been entered during the descent of the floating filter plate 110.

[0042] In some exemplary implementations of this embodiment, the material filter press device further includes a counterweight block 112 , and the counterweight block 112 is connected to the floating filter plate 110 .

[0043] The counterweight block 112 can increase the movement speed of the floating filter plate 110 when it descends for filtration, improve the efficiency of filtration, and generate a larger instantaneous impulse when the floating filter plate 110 descends to the lowest position, so as to facilitate the shaking off of the materials attached to the lower surface of the floating filter plate 110 (the attached materials usually exist in the form of flaky agglomerates. Once they are partially separated from the lower surface of the floating filter plate 110 due to their own weight or shaking, they will pull the attached materials in other positions to fall off together), which is helpful for the automatic cleaning of the floating filter plate 110.

[0044] In some exemplary implementations of this embodiment, the counterweight 112 is spherical in shape and is located below the center of the floating filter plate 110 .

[0045] The counterweight block 112 is located below the center of the floating filter plate 110 , and can provide a downward traction force at the center of the floating filter plate 110 , so that the forces at various locations on the edge of the floating filter plate 110 are balanced.

[0046] In some exemplary implementations of this embodiment, the material filter press device also includes multiple traction ropes 114, one end of each traction rope 114 is evenly distributed on the lower surface of the floating filter plate 110 and fixedly connected to the lower surface of the floating filter plate 110, and the other end of each traction rope 114 is fixedly connected to the counterweight block 112.

[0047] Combination Fig. 9As shown, the floating filter plate 110 can be a thin plate with uniformly distributed pores or a filter cloth. This type of filter element has a certain degree of flexibility. The traction rope 114 can pull the floating filter plate 110 at various locations to prevent the floating filter plate 110 from bending or overturning due to the water pressure. It should be understood that when a flexible floating filter plate 110 is used, a hard frame 100 should be fixedly provided on the edge of the floating filter plate 110, and a sealing sheet or sealing ring 102 is installed between the frame 100 and the inner wall of the low water level sedimentation tank 108. The frame 100 with the sealing ring 102 can both seal and guide the floating filter plate 110.

[0048] In some exemplary implementations of the present embodiment, the material filter press device also includes a limit block 116, which is fixedly connected to the inner wall of the low water level sedimentation tank 108. The edge of the floating filter plate 110 is located above the limit block 116. After the floating filter plate 110 moves downward, it can abut against the limit block 116. The distance between the lower surface of the counterweight block 112 and the bottom surface of the low water level sedimentation tank 108 is smaller than the distance between the upper surface of the limit block 116 and the bottom surface of the low water level sedimentation tank 108.

[0049] The limit block 116 can limit the lowest position of the floating filter plate 110, so that the floating filter plate 110 maintains a distance from the bottom surface of the low water level sedimentation tank 108 to avoid disturbing the sedimentation materials. When the floating filter plate 110 descends to the lowest position, the floating filter plate 110 or the frame 100 collides with the limit block 116, generating a large instantaneous impulse, which facilitates the falling off of the material attached to the lower surface of the floating filter plate 110.

[0050] In some exemplary implementations of the present embodiment, the material filter press device also includes a damping separator net 118, which is horizontally arranged inside the high water level tank 106, and the edge of the damping separator net 118 is fixedly connected to the inner wall of the high water level tank 106. The damping separator net 118 and the limit block 116 are on the same horizontal plane, and the damping separator net 118 is composed of a plurality of nets arranged at equal intervals in the vertical direction.

[0051] When water is poured into the high water level tank 106, the damping separation net 118 can separate the water body, reduce the convection velocity between the bottom of the high water level tank 106 and the water body above, avoid the precipitation of materials, and make the sewage in the lower layer of the low water level sedimentation tank 108 better in a static state, which is convenient for sedimentation.

[0052] In some exemplary implementations of the present embodiment, the bottom surface of the high water level tank 106 is higher than the bottom surface of the low water level sedimentation tank 108, and a connecting port 120 is provided on one side of the high water level tank 106 close to the low water level sedimentation tank 108, the bottom edge of the connecting port 120 is located on the bottom surface of the high water level tank 106, and the top edge of the connecting port 120 is lower than the lower surface of the floating filter plate 110.

[0053] This can prevent the materials settled on the bottom of the low-water-level sedimentation tank 108 from flowing back into the high-water-level water tank 106 .

[0054] In some exemplary implementations of the present embodiment, an inclined plate 132 is fixedly connected between the bottom edge of the connecting port 120 and the bottom surface of the low water level sedimentation tank 108, and the side of the inclined plate 132 close to the high water level tank 106 is higher than the other side, and the bottom edge of the high water level tank 106 and the bottom surface of the low water level sedimentation tank 108 are located on the same horizontal plane, and the bottom edge of the high water level tank 106 and the bottom edge of the inclined plate 132 surround a filling tank 122 with an opening facing downward.

[0055] The bottoms of the low water level sedimentation tank 108 and the high water level water tank 106 are placed on the ground or buried in the soil, and the filling groove 122 is filled with soil, which can improve the anchoring strength (or root fixing strength) between the material filter press device and the ground, and improve the stability of the high water level water tank 106 and the low water level sedimentation tank 108.

[0056] In some exemplary implementations of this embodiment, a sewage outlet 124 is provided on the side of the low water level sedimentation tank 108 away from the high water level tank 106, the sewage outlet 124 is located below the floating filter plate 110, the bottom edge of the sewage outlet 124 is located on the bottom surface of the low water level sedimentation tank 108, and a sewage valve 126 is provided inside the sewage outlet 124.

[0057] In some exemplary implementations of this embodiment, a water outlet 128 is provided on the side of the low water level sedimentation tank 108 away from the high water level tank 106 . The water outlet 128 is located above the floating filter plate 110 , and a water outlet valve 130 is provided inside the water outlet 128 .

[0058] The sewage valve 126 and the water outlet valve 130 can be made of gate plates or electric valves or electric gate plates. Every time the floating filter plate 110 drops to the lowest position, the water outlet valve 130 is opened to take out the clean water. The sewage valve 126 is opened regularly to discharge the materials and sewage settled on the bottom of the low water level sedimentation tank 108 to clean the low water level sedimentation tank 108.

[0059] When cleaning the low-water level sedimentation tank 108, the water pipe 104 can also be used to inject water (clean water) into the top of the low-water level sedimentation tank 108, and the water above the floating filter plate 110 passes through the floating filter plate 110 downward to wash away the attached materials that have not fallen off the lower surface of the floating filter plate 110. At the same time, the falling water flow or water droplets evenly wash all positions on the bottom surface of the low-water level sedimentation tank 108 to clean all positions on the bottom surface of the low-water level sedimentation tank 108. The water pipe 104 can also be used to inject water into the high-water level water tank 106 to clean the high-water level water tank 106, and the sewage and precipitated materials at various positions on the bottom of the low-water level sedimentation tank 108 can be stably moved toward the sewage outlet 124 to improve the cleaning efficiency.

[0060] During the filtering and settling stage, the clean water in the upper layer of the low-water-level sedimentation tank 108 can be input into the high-water-level water tank 106 through the water pipe 104, and the water can be filtered and precipitated multiple times to improve the quality of the effluent water.

[0061] It should be noted that the horizontal dotted filled part in the drawings represents water.

[0062] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A material filter press device, characterized in that: The invention comprises a high water level tank (106), a low water level sedimentation tank (108), and a floating filter plate (110), wherein the high water level tank (106) is located on one side of the low water level sedimentation tank (108), the bottom of the high water level tank (106) is connected to the bottom of the low water level sedimentation tank (108), the low water level sedimentation tank (108) is located in the middle and lower part of the high water level tank (106), the floating filter plate (110) is horizontally arranged inside the low water level sedimentation tank (108), and the edge of the floating filter plate (110) is slidably connected to the inner wall of the low water level sedimentation tank (108) along the vertical direction; The material filter press device further comprises a counterweight block (112), wherein the counterweight block (112) is connected to the floating filter plate (110); The material filter press device further comprises a limit block (116), wherein the limit block (116) is fixedly connected to the inner wall of the low water level sedimentation tank (108), the edge of the floating filter plate (110) is located above the limit block (116), and the floating filter plate (110) can abut against the limit block (116) after moving downward, and the distance between the lower surface of the counterweight block (112) and the bottom surface of the low water level sedimentation tank (108) is smaller than the distance between the upper surface of the limit block (116) and the bottom surface of the low water level sedimentation tank (108).

2. The material filter press device according to claim 1, characterized in that: The counterweight block (112) is spherical in shape and is located below the center of the floating filter plate (110).

3. The material filter press device according to claim 2, characterized in that: The material filter press device further comprises a plurality of traction ropes (114), one end of each traction rope (114) being evenly distributed on the lower surface of the floating filter plate (110) and fixedly connected to the lower surface of the floating filter plate (110), and the other end of each traction rope (114) being fixedly connected to the counterweight block (112).

4. The material filter press device according to claim 3, characterized in that: The material filter press device also includes a damping separation net (118), the damping separation net (118) is horizontally arranged inside the high water level tank (106), the edge of the damping separation net (118) is fixedly connected to the inner wall of the high water level tank (106), the damping separation net (118) and the limit block (116) are on the same horizontal plane, and the damping separation net (118) is composed of a plurality of nets arranged at equal intervals in the vertical direction.

5. The material filter press device according to claim 1, characterized in that: The bottom surface of the high water level water tank (106) is higher than the bottom surface of the low water level sedimentation tank (108); a communication port (120) is provided on one side of the high water level water tank (106) close to the low water level sedimentation tank (108); the bottom edge of the communication port (120) is located on the bottom surface of the high water level water tank (106); and the top edge of the communication port (120) is lower than the lower surface of the floating filter plate (110).

6. The material filter press device according to claim 5, characterized in that: An inclined plate (132) is fixedly connected between the bottom edge of the communication port (120) and the bottom surface of the low water level sedimentation tank (108); one side of the inclined plate (132) close to the high water level tank (106) is higher than the other side; the bottom edge of the high water level tank (106) and the bottom surface of the low water level sedimentation tank (108) are located on the same horizontal plane; the bottom edge of the high water level tank (106) and the bottom edge of the inclined plate (132) surround a filling tank (122) with an opening facing downward.

7. The material filter press device according to claim 1, characterized in that: A sewage outlet (124) is provided on a side of the low water level sedimentation tank (108) away from the high water level water tank (106); the sewage outlet (124) is located below the floating filter plate (110); the bottom edge of the sewage outlet (124) is located on the bottom surface of the low water level sedimentation tank (108); and a sewage valve (126) is provided inside the sewage outlet (124).

8. The material filter press device according to claim 1, characterized in that: A water outlet (128) is provided on a side of the low water level sedimentation tank (108) away from the high water level water tank (106); the water outlet (128) is located above the floating filter plate (110); and a water outlet valve (130) is provided inside the water outlet (128).

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