Detergent tank with filter in bathtub cleaning device

Abstract

To provide a tank with a filter which can appropriately prevent defects such as overflow of liquid such as a detergent from the filter when the liquid is injected to the tank.SOLUTION: A tank A with a filter, which includes a tank 1 for liquid storage; and a filter F which has an internal cavity having an upper opening 50 for liquid injection, is at least partially composed as a liquid filtration part having a plurality of filter holes, and is mounted on the tank 1 so as to project downward from a liquid injection port 10 of the tank 1, includes upper and lower liquid filtration parts 4A and 4B having different arrangements in a vertical height direction as the liquid filtration parts of the filter F, wherein the upper liquid filtration part 4A has an opening size of each of the filter holes 42A larger than that of the lower liquid filtration part 4B.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to In a bathtub cleaning device a tank with a filter. detergent

Background Art

[0002] Conventionally, there has been a bathtub cleaning device for cleaning a bathtub using a liquid detergent. In this bathtub cleaning device, a tank for storing the detergent is used (see, for example, Patent Documents 1 and 2).

[0003] Here, it is common practice to attach a filter for filtering the detergent (liquid) injected into the tank to the tank. As this filter, a filter having a considerably small opening size of the filter holes through which the detergent permeates is used. On the other hand, when attaching the filter to the tank, the attachment location between the liquid inlet of the tank and the upper part of the filter is often in an airtight state or a state close thereto. For this reason, conventionally, when a user injects the detergent into the tank through the filter, a film due to the surface tension of the detergent is likely to form at the position of the filter holes, and the air in the tank is difficult to escape to the outside, so that the replacement of the air and the detergent in the tank is not smoothly performed. Therefore, the film of the detergent is difficult to be broken, and a phenomenon in which the detergent does not smoothly permeate through the filter easily occurs. Since the detergent has viscosity, this also contributes to the above phenomenon. As a result, when the detergent is vigorously injected into the tank, there is a risk that the detergent will overflow from the filter. In addition, since it takes a long time for the detergent to permeate through the filter, there is also an inconvenience that the time required for injecting the detergent into the tank becomes long.

[0004] As a means for solving the above problem, it is conceivable to increase the opening size of the filter holes. However, if such a means is adopted, the filtering performance of the filter is deteriorated, and a problem occurs in that a large amount of impurities are mixed into the tank. Note that the above problems occur not only in the detergent tank but also in a tank with a filter that stores a liquid different from the detergent.​ [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2018-71851 [Patent Document 2] Japanese Patent Publication No. 2019-166247 [Overview of the project] [Problems that the invention aims to solve]

[0006] This invention was conceived under the circumstances described above, and is a detergent. of When pouring into the tank, from the filter detergent It is possible to properly prevent problems such as overflow. In a bathtub cleaning device With filter detergent The challenge is to provide the tanks. [Means for solving the problem]

[0007] To solve the above problems, the present invention employs the following technical measures.

[0008] Provided by the first aspect of the present invention In a bathtub cleaning device With filter detergent The tank comprises a liquid-containing tank having a liquid inlet, and a filter having an internal cavity with an upper opening for liquid injection, and at least a portion of which is configured as a liquid filtration section having a plurality of filter holes, attached to the tank so as to protrude downward from the liquid inlet, for filtering the liquid injected into the tank. In a bathtub cleaning device, the tank is a tank for storing bathtub cleaning detergent as the liquid. With filter detergentA tank comprising an upper and lower liquid filtration section of the filter, the upper liquid filtration section having a different arrangement in the vertical direction, the upper liquid filtration section having larger opening sizes for each filter hole than the lower liquid filtration section, the filter comprising a frame including a cylindrical section in which the upper opening is formed, the upper liquid filtration section having a configuration in which a cylindrical first mesh member is fitted into the cylindrical section, the peripheral wall of the cylindrical section having a communication hole portion having a larger opening size than each filter hole of the upper liquid filtration section, and this communication hole portion facing the first mesh member, and the outer surface of the peripheral wall of the cylindrical section having an outer-side opening recess that communicates with the communication hole portion and has a larger front-view size than the communication hole portion, The first mesh member is characterized in that it closes the outer surface opening of the recess and is provided so as to face the communication hole.

[0009] This configuration yields the following effects: In other words, the filtration of the liquid injected into the tank is mainly carried out by the liquid filtration section at the bottom of the filter. In contrast, the liquid filtration section at the top of the filter has a larger opening size of filter holes and excellent air permeability. Therefore, when liquid is poured into the filter to be injected into the tank, the upper liquid filtration section of the filter is used to smoothly replace the air and liquid inside the tank. Consequently, even if the opening size of the filter holes in the lower liquid filtration section is considerably smaller and the liquid is viscous, a film caused by the surface tension of the liquid is less likely to form. As a result, the liquid passes through the lower liquid filtration section smoothly and quickly, preventing the problem of overflow from the upper opening of the filter to the outside of the tank. This also shortens the time required to inject liquid into the tank, which is convenient. On the other hand, since most of the liquid is filtered using the lower liquid filtration section with its smaller opening size of filter holes, it is also possible to achieve excellent protection against foreign matter contamination inside the tank.

[0011] AlsoWith this configuration, the upper liquid filtration section of the filter has a simple structure in which a cylindrical first mesh member is fitted into the cylindrical part of the frame, making it easy to manufacture and desirable for improving the productivity of the filter and reducing its manufacturing cost. On the other hand, when liquid is poured into the filter, if this liquid permeates the first mesh member constituting the upper liquid filtration section, it also passes through the communication holes provided in the peripheral wall of the cylindrical part. Therefore, by setting the opening size and number of the communication holes to appropriate specifications, it is possible to prevent an excessive amount of liquid from permeating the first mesh member. It is also possible to set the communication holes and the first mesh member to appropriately replace air and liquid in the tank without excess or deficiency. Since the opening size of the communication holes is larger than that of the filter holes in the upper liquid filtration section (the filter holes of the first mesh member), they do not hinder the liquid filtration action of the first mesh member.

[0013] moreover This configuration yields the following effects: In other words, when the liquid poured into the filter reaches the position of the first mesh member, it passes through the communication hole. However, the first mesh member is not positioned to directly block this communication hole. Instead, a recess is provided between the communication hole and the first mesh member, which is larger in front view than the communication hole. Therefore, the liquid that has passed through the communication hole can pass through a wider area of ​​the first mesh member opposite the recess, rather than just the narrow area facing the communication hole. Thus, filtration can be performed by effectively utilizing the wide area of ​​the first mesh member. Furthermore, since it is possible to generate not only a linear liquid flow from the communication hole to the first mesh member, but also a non-linear flow, it is expected that the foreign matter capture function of the first mesh member will be improved.

[0014] In the present invention, preferably, the recess of the cylindrical portion is an annular recess extending in the circumferential direction of the cylindrical portion, and a pair of upper and lower mesh member fitting portions into which the first mesh member is fitted are provided on the upper and lower sides of the annular recess of the circumferential wall of the cylindrical portion.

[0015] With this configuration, it is possible to rationally construct a configuration in which the first mesh member is positioned opposite the communication hole via a recess (annular recess).

[0016] A filtered tank provided in a second aspect of the present invention comprises a liquid-containing tank having a liquid inlet, and a filter having an internal cavity with an upper opening for liquid injection, and at least a portion of which is configured as a liquid filtration section having a plurality of filter holes, and is attached to the tank so as to protrude downward from the liquid inlet, for filtering the liquid injected into the tank. In a bathtub cleaning device, the tank is a tank for storing bathtub cleaning detergent as the liquid. With filter detergent The tank comprises an upper and lower liquid filtration section of the filter, which differs in its vertical arrangement, the upper liquid filtration section having larger opening sizes for each filter hole than the lower liquid filtration section, the filter comprises a frame including a cylindrical section in which the upper opening is formed, the upper liquid filtration section is configured such that a cylindrical first mesh member is fitted into the cylindrical section, the peripheral wall of the cylindrical section is provided with a communication hole that connects the inside and outside of the peripheral wall, the communication hole having a larger opening size than each filter hole of the upper liquid filtration section, and this communication hole faces the first mesh member, the frame has a lower region below the cylindrical section where a plurality of columnar sections extending in the vertical direction are spaced apart in the same direction as the circumferential direction of the cylindrical section, and the lower liquid filtration section has a cylindrical second mesh member, the second mesh member being fitted into the plurality of columnar sections in the lower region.

[0017] According to such a configuration, the lower liquid filtration part can be easily manufactured, and it is possible to further reduce the manufacturing cost of the filter, and thus the manufacturing cost of the entire tank with the filter.

[0018] Other features and advantages of the present invention will become clearer from the following description of the embodiments of the invention with reference to the accompanying drawings.

Brief Description of the Drawings

[0019] [Figure 1] It is a cross-sectional view showing an example of a tank with a filter according to the present invention. [Figure 2] It is an enlarged cross-sectional view of the main part of FIG. 1. [Figure 3] It is a perspective view of the filter shown in FIGS. 1 and 2. [Figure 4] It is a longitudinal sectional view of FIG. 3. [Figure 5] (a) is a cross-sectional view taken along Va-Va of FIG. 4, and (b) is a cross-sectional view taken along Vb-Vb of FIG. 4. [Figure 6] It is an exploded perspective view of the filter shown in FIGS. 1 to 5. [Figure 7] (a) and (b) are explanatory views showing an example in the case of resin molding the frame of the filter shown in FIGS. 1 to 5. [Figure 8] It is a perspective view of the pressing member shown in FIGS. 1 and 2. [Figure 9] It is a perspective view showing another example of the present invention. [Figure 10] (a) and (b) are longitudinal sectional views of the main parts at different locations of FIG. 9. [Figure 11] (a) is a cross-sectional view taken along XI-XI of FIG. 10(a), and (b) is a partially enlarged cross-sectional view of (a). [Figure 12] It is an exploded perspective view of FIG. 9.

Embodiments for Carrying Out the Invention

[0020] Preferred embodiments of the present invention will be described in detail below with reference to the drawings.

[0021] Tank A with filter shown in Figure 1 (This corresponds to an example of a detergent tank with a filter in the bathtub cleaning device of the present invention.) This is used as a component of the bathtub cleaning device and is for storing the detergent (liquid) used to clean the bathtub. The bathtub cleaning device is equipped with a spray nozzle for spraying the cleaning solution into the bathtub, and the detergent stored in this filter-equipped tank A is mixed with hot water and supplied to the spray nozzle. Specifically, the filter-equipped tank A comprises a detergent storage tank 1, a filter F, a roughly ring-shaped retaining member 2, and a lid 3, among other things.

[0022] Tank 1 is made of resin, for example, and the top surface of this tank 1 has a detergent inlet 10 (liquid A series of roughly cylindrical tube sections 11 forming a body inlet are provided, and a detergent outlet 12 (liquid outlet) is provided on the lower surface. This tank 1 is attached to a bathtub flange section 95 provided on the bathtub. As a means of attachment, a retaining member 2 screwed onto the tube section 11 is fitted into a flange opening 96 provided on the bathtub flange section 95, and the bathtub flange section 95 is sandwiched from above and below by the upper outer circumference of the retaining member 2 and a separately provided spacer 97 (see also Figure 2).

[0023] The retaining member 2 is provided with a screw portion 21 that can be screwed into the screw portion 13 of the cylindrical portion 11, as well as a plurality of protrusions 22. The plurality of protrusions 22 are parts for engaging a predetermined work tool (not shown) to facilitate the operation of screwing in and unscrewing the screw portions 13 and 21 when rotating the retaining member 2, and they protrude radially inward from the upper inner surface of the retaining member 2 (see also Figure 8). Preferably, these plurality of protrusions 22 are provided so as not to protrude inward from the inner surface of the upper opening 50 of the filter F, which will be described later. The lower edge e of the tip of each protrusion 22 may be sharp, but with the above configuration, when a user inserts their finger into the upper opening 50, their fingertip will not touch the edge e.

[0024] Filter F is used to collect and remove impurities mixed in the detergent. As is clearly shown in Figures 2 to 4, filter F comprises upper and lower liquid filtration sections 4A and 4B, and a frame FL. The upper and lower liquid filtration sections 4A and 4B are constructed using the first and second mesh members 40A and 40B, which will be described later.

[0025] The frame FL is made of resin and has an internal cavity with an upper opening 50 for liquid injection. More specifically, in addition to the cylindrical portion 5 in which the upper opening 50 is formed, the frame FL includes a flange portion 51 connected to the upper part of the cylindrical portion 5 and a plurality of columnar portions 6 connected to the lower part of the cylindrical portion 5.

[0026] The flange portion 51 is engageable with the upper end of the cylindrical portion 11 of the tank 1. The filter F is attached to the tank 1 by sandwiching the flange portion 51 vertically between the cylindrical portion 11 and the retaining member 2, and enters the tank 1 so as to extend below the cylindrical portion 11 of the tank 1.

[0027] The lower liquid filtration section 4B is configured such that a second mesh member 40B is fitted and attached to the inside of multiple columnar sections 6 of the frame FL. The multiple columnar sections 6 are connected to the lower part of the cylindrical section 5 and extend in the vertical direction, and are spaced apart in the same direction as the circumferential direction of the cylindrical section 5 (see also Figure 5(a)). The lower parts of these multiple columnar sections 6 are connected to each other via a ring section 60.

[0028] The second mesh member 40B is a metal mesh member having an internally hollow (cylindrical) shape with an open top and a closed bottom, that is, a cylindrical peripheral wall portion 40Ba in an upright position in the vertical direction and a lower wall portion 40Bb that closes the lower opening. In each part of this second mesh member 40B, as shown in the partially enlarged side view 2 of Figure 2, multiple metal vertical and horizontal wires 41B intersect, resulting in a matrix of multiple minute filter holes 42B. The second mesh member 40B is attached to the frame FL by inserting it downward into the frame FL through the upper opening 50, as shown by arrow Nb in Figure 6.

[0029] The upper liquid filtration section 4A has a configuration in which a cylindrical first mesh member 40A is fitted onto the cylindrical portion 5 of the frame FL, and is located above the lower liquid filtration section 4B. The cylindrical portion 5 is provided with multiple communication holes 52a and 52b that connect the inside and outside of the cylindrical portion 5, allowing detergent and air to pass through.

[0030] The first mesh member 40A, like the second mesh member 40B described above, is a metal mesh member such as stainless steel, and as shown in the partially enlarged side view 1 of Figure 2, multiple metal vertical and horizontal wires 41A intersect, and multiple minute filter holes 42A are arranged in a matrix. However, the opening size of the filter holes 42A in the upper liquid filtration section 4A (first mesh member 40A) is larger than the opening size of the filter holes 42B in the lower liquid filtration section 4B (second mesh member 40B).

[0031] Preferably, the first mesh member 40A is made of stainless steel, and the portions where the vertical and horizontal stainless steel wires 41A intersect and overlap each other form joints where surface diffusion of components contained in stainless steel, such as Cr, Mn, and Ni, occurs. This makes it difficult for the mesh member to fray or lose its shape. This property can be obtained by performing a heat treatment on the first mesh member 40A, heating it to a temperature above a predetermined temperature in a vacuum. The first mesh member 40A is formed in a cylindrical shape on its own and fitted onto the cylindrical portion 5, so it is inherently prone to fraying, but the joints formed by the heat treatment described above can eliminate or reduce the risk of such problems. On the other hand, since the second mesh member 40B is located inside the frame FL, it is less prone to fraying compared to the first mesh member 40A. For this reason, there is little need for the second mesh member 40B to have the heat-treated joint described above, although it is possible to have the heat-treated joint described above.

[0032] The communication holes 52a and 52b are holes with a larger opening size than the filter holes 42A of the upper liquid filtration section 4A. Here, as is clearly shown in Figure 5(b), the communication hole 52a is a normal through hole, while the communication hole 52b is a hole formed by providing a partially thinned portion 53 on the peripheral wall of the cylindrical portion 5, and is divided into left and right halves via a rib 54. The rib 54 is a part that ensures the strength of the area where the communication hole 52b is formed. These communication holes 52a, 52b and the rib 54 are formed, for example, as follows.

[0033] In other words, when resin molding the frame FL, molds 9A to 9C, as shown in Figure 7(a), are used to form a cavity 90 for resin filling. Here, as shown in Figure 7(b), the vertical direction in these figures is the exit direction of the molds 9A and 9B, and the molds 9A and 9B are provided with convex portions 91 for forming communication holes 52a. The molds 9A and 9B are also provided with convex stepped portions 92 for providing thin-walled portions 53. Of the cavity 90, the portion corresponding to the rib 54 of the frame FL is formed at the point where the convex stepped portions 92 meet. If it were to provide a total of four communication holes similar to the communication holes 52a in the cylindrical portion 5, it would be necessary to ensure that the exit directions of the molds 9A and 9B are in four directions, which would lead to increased complexity and cost for the molds 9A and 9B. However, with the configuration of this embodiment described above, it is possible to eliminate such concerns.

[0034] The outer surface of the peripheral wall portion of the cylindrical portion 5 of frame FL is provided with an annular recess 55 extending in the circumferential direction of the cylindrical portion 5, and a pair of upper and lower mesh member fitting portions 56a and 56b located above and below the annular recess 55, into which the first mesh member 40A is fitted. Furthermore, an upper stepped portion 57 is located above the upper mesh member fitting portion 56a and has a larger outer diameter than the mesh member fitting portion 56a, and a groove 58 is located below the lower mesh member fitting portion 56b and into which a locking member 7 is fitted. The locking member 7 is a partially notched ring-shaped (C-shaped ring) member that can expand and contract with elastic restoring force. Yes, for example, it can be manufactured by bending a metal wire. The first mesh member 40A can be fitted onto the lower region of the filter F from below, as shown by the arrow Na in Figure 6, and then slid upward to fit onto the mesh member fitting portions 56a and 56b of the cylindrical portion 5. The locking member 7 can be fitted into the groove 58 from one side, thereby locking onto the lower part of the first mesh member 40A and preventing the first mesh member 40A from falling downward. Upward displacement of the first mesh member 40A is prevented by the upper step portion 57.

[0035] The annular recess 55 provided in the cylindrical portion 5 corresponds to a specific example of the "outer surface opening recess with a front view size larger than the communication hole portion" as defined in the present invention, and is a recess that communicates with the communication holes 52a and 52b and has a greater vertical width and left-right width than the outer openings of the respective communication holes 52a and 52b. The first mesh member 40A closes the outer surface opening of the annular recess 55 and faces the respective communication holes 52a and 52b.

[0036] The outer diameter of the first mesh member 40A is smaller than the inner diameter of the cylindrical portion 11 of the tank 1, and a gap C1 is formed between the first mesh member 40A and the cylindrical portion 11, which is part of the area inside the tank 1. As a result, the area inside the tank 1 is in communication with the inner area of ​​the filter F via the first mesh member 40A, the annular recess 55, and the communication holes 52a and 52b.

[0037] Next, the operation of the filter-equipped tank A described above will be explained.

[0038] With the lid 3 removed, when detergent (liquid) is poured into the inside of the filter F to contain the detergent in the tank 1, the detergent reaches the lower part of the filter F, passes through the lower liquid filtration section 4B (second mesh member 40B), and flows into the tank 1. In other words, the filtration of the detergent is basically performed using the lower liquid filtration section 4B.

[0039] When detergent flows into tank 1, the air inside tank 1 escapes through the gap C1 and the upper liquid filtration section 4A (first mesh member 40A) into the inner region of filter F. As a result, the exchange between the air inside tank 1 and the detergent attempting to flow into tank 1 proceeds smoothly, and despite the relatively small opening size of the filter holes 42B in the lower liquid filtration section 4B and the viscosity of the detergent, the phenomenon of a detergent film forming on the filter holes 42B due to the surface tension of the detergent becomes less likely to occur. Therefore, the detergent passes smoothly and quickly through the lower liquid filtration section 4B. As a result, a large amount of detergent accumulates in the filter F, preventing it from overflowing onto the bathtub flange section 95 from the top of the filter F. The time required to inject detergent into the tank 1 is also shortened.

[0040] On the other hand, if detergent is rapidly injected into filter F, and the amount of detergent injected into filter F is greater than the amount of detergent that permeates through the lower liquid filtration section 4B, the liquid level of detergent in filter F will rise. The liquid level of detergent may rise to the position of the upper liquid filtration section 4A, in which case some of the detergent will be filtered by the upper liquid filtration section 4A and flow into tank 1. Although the opening size of the filter holes 42A of the upper liquid filtration section 4A is larger than that of the lower liquid filtration section 4B, it is possible to achieve a superior effect in preventing foreign matter from entering tank 1, unlike when the detergent flows directly into tank 1 without any filtering action being performed.

[0041] Furthermore, when the detergent injected into the filter F reaches the position of the first mesh member 40A, it passes through the communication holes 52a and 52b before that. In contrast, the first mesh member 40A is not positioned to directly block the communication holes 52a and 52b, and the communication holes An annular recess 55 is located between sections 52a and 52b and the first mesh member 40A. Therefore, the detergent that has passed through the communication holes 52a and 52b does not only pass through the narrow area of ​​the first mesh member 40A facing the communication holes 52a and 52b, but can also pass through the wide area facing the annular recess 55. Thus, filtration that effectively utilizes the wide area of ​​the first mesh member 40A becomes possible. The flow of detergent that passes through the first mesh member 40A after passing through the communication holes 52a and 52b can be not only linear but also non-linear, so it is expected that the foreign matter capture function of the first mesh member 40A will be further improved.

[0042] Figures 9 to 12 show other embodiments of the present invention. In these figures, elements identical or similar to those in the above embodiments are denoted by the same reference numerals, and redundant explanations are omitted.

[0043] The filter Fa shown in Figures 9 to 12 includes an auxiliary member 8, and its other configurations are the same as those of the filter F described above. The auxiliary member 8 is made of resin and is formed in a substantially circular ring shape. It comprises a pair of upper and lower ring portions 80 spaced apart in the vertical direction, and a plurality of vertical wall portions 81 extending in the vertical direction so as to connect these pairs of ring portions 80. The areas between the pairs of ring portions 80 where no vertical wall portions 81 are provided correspond to openings 82 on the circumferential side of the auxiliary member 8.

[0044] The aforementioned auxiliary member 8 is fitted (externally fitted) onto the outer surface of the upper liquid filtration section 4A (first mesh member 40A). The upper stepped portion 57 and locking member 7 of the cylindrical portion 5 are located above and below the auxiliary member 8, and, similar to the first mesh member 40A, the positioning and fixing of the auxiliary member 8 in the vertical height direction is ensured. As shown in Figure 11, the multiple vertical wall portions 81 of the auxiliary member 8 are set to face the communication holes 52a and 52b of the cylindrical portion 5. Although a portion of the upper liquid filtration section 4A is covered by the auxiliary member 8, the portion facing the opening 82 of the auxiliary member 8 is not covered, and liquid permeability (water permeability) and air permeability are ensured in this portion.

[0045] In this embodiment, in addition to obtaining the same effects and advantages as those obtained in the filter F of the previous embodiment, the following further effects and advantages can be obtained. In other words, when the liquid level of the detergent injected into filter Fa rises to the height of the upper liquid filtration section 4A (first mesh member 40A), the detergent passes through the communication holes 52a, 52b and the annular recess 55 and permeates the first mesh member 40A. In this case, as shown by the arrow Nc in Figure 11(b), the detergent that has traveled outward from the cylindrical section 5 through the communication holes 52a, 52b and the annular recess 55 collides with the vertical wall portion 81 of the auxiliary member 8, preventing it from passing through the first mesh member 40A and flowing into the tank 1. The detergent that collides with the vertical wall portion 81 then flows towards other parts of the annular recess 55, for example, as shown by the arrow Nd, before permeating the first mesh member 40A. This improves the foreign matter capture function of the upper liquid filtration section 4A.

[0046] The present invention is not limited to the embodiments described above. In a bathtub cleaning device With filter detergent The specific configuration of each part of the tank can be freely modified in various ways within the scope intended by this invention.

[0047] The upper liquid filtration section can be configured such that the cylindrical first mesh member is fitted (inserted) inside the cylindrical portion of the frame, instead of being fitted (externally fitted) to the outside of the cylindrical portion. Similarly, the lower liquid filtration section can be configured such that the cylindrical second mesh member is fitted (externally fitted) outside the multiple columnar portions of the frame, instead of being fitted (inserted) inside the multiple columnar portions.

[0048] The upper and lower liquid filtration sections can be easily manufactured if they are constructed using metal mesh members, but this is not the only option. Other materials, such as resin, may be used as the mesh members. 。 The upper and lower liquid filtration sections should be arranged such that the upper section has a larger filter pore opening size than the lower section. The specific values ​​for the filter pore opening sizes should be selected appropriately, taking into account the required liquid filtration performance and other factors.

[0049] In the above embodiment, the communication holes (52a, 52b) provided in the cylindrical portion of the frame are made to have a relatively small opening size, but they may also be made to have a relatively large opening size. Furthermore, the specific number of communication holes is not limited. Tan The specific shape, size, and material of the object are not limited. [Explanation of symbols]

[0050] A filter-equipped tank (Filtered detergent tank in a bathtub cleaning device) F filter FL frame (of the filter) 1 tank 10. Detergent inlet (liquid inlet) 4A, 4B Upper and lower liquid filtration sections 40A, 40B First and second mesh members 42A, 42B filter holes 5. Cylindrical part 50 Top opening 52a,52b Communication hole 55 Annular recess (recess)

Claims

1. A liquid storage tank having a liquid inlet, It has an internal cavity with an upper opening for liquid injection, and at least a portion of it is configured as a liquid filtration section having a plurality of filter holes, and is attached to the tank so as to protrude downward from the liquid inlet, and is a filter for filtering the liquid injected into the tank, It is equipped with, The tank is a tank for storing bathtub cleaning detergent as the liquid, and is a filter-equipped detergent tank in a bathtub cleaning device. The liquid filtration section of the filter comprises an upper and a lower liquid filtration section that are arranged differently in the vertical direction, wherein the opening size of each filter hole in the upper liquid filtration section is larger than that of the lower liquid filtration section. The filter comprises a frame including a cylindrical portion in which the upper opening is formed, The upper liquid filtration section is configured such that a cylindrical first mesh member is fitted into the cylindrical portion. The peripheral wall of the cylindrical portion is provided with a communication hole that connects the inside and outside of the peripheral wall, and this communication hole has an opening size larger than that of each filter hole in the upper liquid filtration portion, and this communication hole faces the first mesh member. The outer surface of the peripheral wall of the cylindrical portion is provided with an outer-side opening recess that communicates with the communication hole and has a larger front-view size than the communication hole. A detergent tank with a filter in a bathtub cleaning device, characterized in that the first mesh member is provided to close the outer surface opening of the recess and to face the communication hole.

2. A detergent tank with a filter in a bathtub cleaning device according to claim 1, The recess in the cylindrical portion is an annular recess extending in the circumferential direction of the cylindrical portion. A detergent tank with a filter in a bathtub cleaning device, wherein a pair of upper and lower mesh member fitting portions are provided on the upper and lower sides of the annular recess of the circumferential wall portion of the cylindrical portion, into which the first mesh member is fitted.

3. A liquid storage tank having a liquid inlet, It has an internal cavity with an upper opening for liquid injection, and at least a portion of it is configured as a liquid filtration section having a plurality of filter holes, and is attached to the tank so as to protrude downward from the liquid inlet, and is a filter for filtering the liquid injected into the tank, It is equipped with, The tank is a tank for storing bathtub cleaning detergent as the liquid, and is a filter-equipped detergent tank in a bathtub cleaning device. The liquid filtration section of the filter comprises an upper and a lower liquid filtration section that are arranged differently in the vertical direction, wherein the opening size of each filter hole in the upper liquid filtration section is larger than that of the lower liquid filtration section. The filter comprises a frame including a cylindrical portion in which the upper opening is formed, The upper liquid filtration section is configured such that a cylindrical first mesh member is fitted into the cylindrical portion. The peripheral wall of the cylindrical portion is provided with a communication hole that connects the inside and outside of the peripheral wall, and this communication hole has an opening size larger than that of each filter hole in the upper liquid filtration portion, and this communication hole faces the first mesh member. The frame has a lower region in which a plurality of columnar parts extending in the vertical direction below the cylindrical part are located at intervals in the same direction as the circumferential direction of the cylindrical part. A detergent tank with a filter in a bathtub cleaning device, characterized in that the lower liquid filtration section has a cylindrical second mesh member, and this second mesh member is fitted into the plurality of columnar portions in the lower region.

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