Tank with filter

Abstract

To provide a tank with a filter having a tank body 1 to store a liquid and a cylindrical filter 3 with a bottom being inserted into a cylindrical injection port 2 provided at the upper surface part of the tank body 1 and having an opening 3a for injection at the top edge where the damage of the smoothness of the replacement of air with the liquid by the rise of the liquid surface level in the tank body 1 can be prevented in the filter 3.SOLUTION: A filter flange part 31 is provided at the upper end part of a filter 3 and an injection flange part 21 is inserted with the filter flange part 31 at the upper end part of the injection port 2. A receive seat 22 to receive the filter flange part 31 is projected at the inner peripheral surface of the injection port flange part 21. A notch part 32 is formed on the outer peripheral surface of the filter flange part 31. A groove part 23 facing the notch part 32 at the receive seat 22 is formed. The internal space of the tank body 1 is open to an atmosphere via the groove part 23 and the notch part 32.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a tank with a filter used to store liquid such as detergent in a bathtub cleaning device or the like, which comprises a tank body for storing the liquid, and a bottomed cylindrical filter having an injection opening at its upper end, which is inserted into a cylindrical injection port provided on the upper surface of the tank body. [Background technology]

[0002] Conventionally, a known example of this type of tank with a filter is one disclosed in Patent Document 1, in which an air vent is formed in the upper part of a filter frame, which is a component of the filter, and the internal space of the tank body is open to the atmosphere via the air vent and an injection opening at the upper end of the filter. In this tank, when liquid is injected into the filter through the injection opening and filtered by the filter before being injected into the tank body, the air inside the tank body escapes to the outside of the tank via the air vent and the injection opening, replacing the air with the liquid inside the tank.

[0003] However, if the flow rate of the liquid injected into the filter is increased, the liquid level in the filter may rise and the air vent may sink below the liquid level. In this case, the air in the tank body cannot escape to the outside, and the air in the tank body cannot be smoothly replaced by the liquid. As a result, problems occur such as the liquid easily overflowing from the injection opening and the time it takes to inject the liquid into the tank body. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2023-40574 A Summary of the Invention [Problem to be solved by the invention]

[0005] In view of the above, an object of the present invention is to provide a tank with a filter that can prevent the smooth replacement of air and liquid in the tank body from being impaired due to a rise in the liquid level in the filter. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides a filter-equipped tank comprising a tank body for storing liquid, and a bottomed cylindrical filter having an opening at its upper end for injecting liquid, which is inserted into a cylindrical inlet provided on the upper surface of the tank body, wherein a filter flange portion is provided at the upper end of the filter, and an inlet flange portion into which the filter flange portion is inserted is provided at the upper end of the inlet, a receiving seat on which the filter flange portion sits is protruded from the inner peripheral surface of the inlet flange portion, a notch portion is formed on the outer peripheral surface of the filter flange portion, a groove portion facing the notch portion is formed in the receiving seat, and the internal space of the tank body is opened to the atmosphere via the groove portion and the notch portion.

[0007] According to the present invention, even if the liquid level in the filter reaches the upper end of the filter, the air in the tank body escapes to the outside of the tank through the groove in the receiving seat and the notch in the filter flange. This prevents the smooth replacement of air with liquid in the tank body from being impaired due to a rise in the liquid level in the filter, and allows liquid to be quickly injected into the tank body without overflowing from the injection opening.

[0008] In the present invention, it is also preferable that the groove of the receiving seat is formed so as not to reach the lower end of the receiving seat. In this way, the groove has a lower end surface, and any foreign matter that falls into the groove through the notch of the filter flange is received by the lower end surface of the groove. This makes it possible to prevent foreign matter from falling into the tank body.

[0009] In this case, an upward protrusion may be provided on the radially inward portion of the bottom end surface of the groove, which can prevent foreign objects from falling from the bottom end surface of the groove and more reliably suppress the falling of foreign objects into the tank body.

[0010] In addition, in the present invention, it is preferable to provide a positioning means for positioning the filter in the circumferential direction with respect to the inlet so that the notch of the filter flange matches the groove of the receiving seat. This prevents the notch from being displaced from the groove, and ensures smooth replacement of air and liquid in the tank body. Here, when the inlet is configured as an inner and outer double cylinder structure with an inner cylinder integral with the tank body and an outer cylinder screwed to the outside of the inner cylinder, and the inlet flange is provided at the upper end of the outer cylinder, it is preferable to configure the positioning means with a recess recessed radially inward at a predetermined circumferential position on the upper part of the filter, and a protrusion protruding radially inward and engaging with the recess, which is provided at a predetermined circumferential position on the inner circumferential surface of the inlet flange, and the protrusion is used as an engagement part of a tool used to screw the outer cylinder to the inner cylinder. This makes it possible to screw the outer cylinder to the inner cylinder by engaging the positioning protrusion with a tool, which is rational. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a perspective view of a part of a filter-equipped tank according to an embodiment of the present invention, in which a part of the filter-equipped tank is cut away. [Diagram 2] FIG. 2 is a cross-sectional view of the main part taken along line II-II in FIG. [Diagram 3] 3 is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4] FIG. 2 is an exploded perspective view of a main part of the filter-equipped tank according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] A filter tank A according to an embodiment of the present invention shown in Fig. 1 is used to store liquid detergent in a bathtub cleaning device. Referring also to Fig. 2, this filter tank A includes a tank body 1 for storing detergent, and a bottomed cylindrical filter 3 having an injection opening 3a at its upper end, which is inserted into a cylindrical injection port 2 provided on the upper surface of the tank body 1. Referring also to Fig. 4, the filter 3 is composed of a filter body 3b made of a net, and a filter frame 3c that supports the filter body 3b.

[0013] The upper end of the inlet 2 is provided with an inlet flange portion 21. The inlet 2 is configured as an inner and outer double cylinder structure with an inner cylinder portion 2a integral with the tank body 1 and an outer cylinder portion 2b screwed to the outside of the inner cylinder portion 2a. The inlet flange portion 21 is provided at the upper end of the outer cylinder portion 2b. Furthermore, an annular packing 4 is placed on the upper surface of the tank body 1 so as to surround the inlet 2. The tank A with the filter is fixed to the bathtub flange by screwing the outer cylinder portion 2b to the inner cylinder portion 2a so as to sandwich the bathtub flange (not shown) from above and below between the inlet flange portion 21 and the packing 4. In addition, a groove portion 21a is formed on the outer peripheral surface of the inlet flange portion 21 to engage the injection opening 3a and the cover body (not shown) that covers the inlet flange portion 21 from above. If this cover body is removed, the filter 3 can be removed from the inlet 2 without removing the outer cylinder portion 2b of the inlet 2. Therefore, the maintainability of the filter 3 is improved.

[0014] A filter flange 31 is provided at the upper end of the filter 3, i.e., the upper end of the filter frame 3c, to be inserted into the inlet flange 21. A receiving seat 22 on which the filter flange 31 is seated is protruded from the inner peripheral surface of the inlet flange 21. An upper surface 22a of the receiving seat 22 is located below the upper surface of the inlet flange 21, and when the filter flange 31 is inserted into the inlet flange 21, the lower surface of the filter flange 31 is seated on the upper surface 22a of the receiving seat 22. A radial gap is provided between the inner peripheral surface of the receiving seat 22 and the upper outer peripheral surface of the filter 3 facing it.

[0015] A plurality of notches 32 are formed at circumferential intervals on the outer peripheral surface of the filter flange portion 31. Furthermore, as shown in Figures 3 and 4, a plurality of receiving seats 22 are provided on the inner peripheral surface of the inlet flange portion 21 at circumferential intervals so that each circumferential portion of the filter flange portion 31, including each notch 32, is individually seated. A groove portion 23 facing each notch portion 32 is formed in each receiving seat 22. The internal space of the tank body 1 is opened to the atmosphere via each groove portion 23 and each notch portion 32.

[0016] According to this, when detergent is injected into the filter 3 through the injection opening 3a, even if the liquid level in the filter 3 reaches the upper end of the filter 3, the air in the tank body 1 escapes to the outside of the tank through the groove 23 and the notch 32. This prevents the smooth replacement of air and detergent in the tank body 1 from being impaired due to a rise in the liquid level in the filter 3. As a result, the detergent can be injected quickly into the tank body 1 without overflowing from the injection opening 3a.

[0017] Also, it is possible to form each groove 23 in each receiving seat 22 so that it reaches its lower end, but in this embodiment, each groove 23 is formed in each receiving seat 22 so that it does not reach the lower end of each receiving seat 22. Therefore, each groove 23 has a lower end surface 23a. According to this, foreign matter that falls into the groove 23 through the cutout portion 32 of the filter flange portion 31 is received by the lower end surface 23a of the groove 23. Therefore, it is possible to suppress the falling of foreign matter into the tank body 1.

[0018] In addition, an upward protrusion 23b may be provided on a radially inward portion of the lower end surface 23a of the groove portion 23, for example, on the radially inner end, as shown by an imaginary line in Fig. 2. In this way, the protrusion 23b can prevent foreign matter from falling from the lower end surface 23a of the groove portion 23, and the falling of foreign matter into the tank body 1 can be more reliably suppressed.

[0019] In this embodiment, a positioning means 5 is provided for positioning the filter 3 in the circumferential direction with respect to the inlet 2 so that each notch 32 matches each groove 23. This prevents each notch 32 from being displaced from each groove 23, and ensures smooth replacement of air and detergent in the tank body 1. The positioning means 5 is composed of a recess 51 recessed radially inward at a predetermined circumferential position on the upper part of the filter 3, and a protrusion 52 protruding radially inward and engaging with the recess 51 at a predetermined circumferential position on the inner peripheral surface of the inlet flange portion 21. Specifically, a recessed groove that becomes the recess 51 is formed at two positions 180° apart in the circumferential direction on the outer peripheral surface of the filter frame 3c, and protrusions 52 are provided at two positions 180° apart in the circumferential direction on the inner peripheral surface of the inlet flange portion 21, protruding away from the receiving seat 22 in the circumferential direction. The filter 3 is positioned in the circumferential direction so that the protrusions 52 engage with the recesses 51, and thus the notches 32 are aligned with the grooves 23.

[0020] Furthermore, in this embodiment, each protrusion 52 doubles as an engagement portion of a tool (not shown) that is used when screwing outer cylinder portion 2b, which is one of the components of injection port 2, to inner cylinder portion 2a, which is the other component of injection port 2. This is rational because the tool can be engaged with positioning protrusion 52 to screw outer cylinder portion 2b to inner cylinder portion 2a.

[0021] Although the embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited thereto. For example, in the above embodiment, a plurality of receiving seats 22 are provided between a pair of convex portions 52, 52 on the inner peripheral surface of the inlet flange portion 21, which are spaced apart in the circumferential direction, but it is also possible to provide a single receiving seat 22 that is continuous in the circumferential direction between a pair of convex portions 52, 52. In addition, in the above embodiment, a plurality of notches 32 are formed on the outer peripheral surface of the filter flange portion 31, but the number of notches 32 and the number of groove portions 23 may be one. Furthermore, in the above embodiment, the inlet 2 has an inner and outer double cylindrical structure, and the inlet flange portion 21 is provided at the upper end of the outer cylindrical portion 2b of the inlet 2, but the inlet 2 may be formed only of a cylindrical portion integral with the tank body 1, and the inlet flange portion 21 may be provided at the upper end thereof. In addition, the filter-equipped tank A in the above embodiment is for storing detergent, but the present invention can be similarly applied to a filter-equipped tank that stores liquids other than detergent. [Explanation of symbols]

[0022] A...tank with filter, 1...tank body, 2...inlet, 21...inlet flange portion, 22...receiving seat, 23...groove portion, 23a...lower end surface of groove portion, 23b...projection portion, 3...filter, 3a...inlet opening, 31...filter flange portion, 32...cutout portion, 5...positioning means, 51...recess, 52...projection portion.

Claims

1. A tank with a filter includes a tank body for storing liquid, and a cylindrical filter having a bottom and an opening at its upper end for injecting liquid, the filter being inserted into a cylindrical inlet provided on the upper surface of the tank body, a filter-equipped tank comprising: a filter flange portion provided at the upper end of a filter; an injection port flange portion provided at the upper end of an injection port, into which the filter flange portion is inserted; a receiving seat for receiving the filter flange portion protruding from the inner peripheral surface of the injection port flange portion; a notch portion formed in the outer peripheral surface of the filter flange portion; a groove portion facing the notch portion formed in the receiving seat; and the internal space of the tank body being open to the atmosphere via the groove portion and the notch portion.

2. 2. The tank with a filter according to claim 1, wherein the groove is formed so as not to reach a lower end of the receiving seat.

3. 3. The tank with a filter according to claim 2, wherein an upward protrusion is provided on a radially inward portion of a lower end surface of the groove.

4. 4. The tank with a filter according to claim 1, further comprising a positioning means for positioning the filter in a circumferential direction with respect to the injection port so that the notch matches the groove.

5. 5. The tank with a filter according to claim 4, wherein the filler port has an inner and outer double cylinder structure including an inner cylinder portion integral with the tank body and an outer cylinder portion screwed to the outside of the inner cylinder portion, and the filler port flange portion is provided at an upper end of the outer cylinder portion. a filter-equipped tank, characterized in that the positioning means is composed of a recess recessed radially inwardly at a predetermined circumferential position on the upper part of the filter, and a convex portion provided at a predetermined circumferential position on the inner surface of the injection port flange portion, protruding radially inward and engaging with the recess, and the convex portion also serves as an engaging portion of a tool used to screw the outer cylindrical portion into the inner cylindrical portion.

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