Filter with a water level sensor

Abstract

Filter with a water level sensor, comprising a housing (1), a filter element (2) and a water level sensor (3), characterized in that the housing (1) comprises a base (101) and a bottom cover (102), wherein the bottom cover (102) is mounted below the base (101), wherein a downwardly directed central column (1013) is arranged on the inside of the base (101), The filter element (2) comprises an upper end cap (201), a lower end cap (202), a filter material (203), and a central support element (204), wherein a first central opening (2011) is arranged in the center of the upper end cap (201), wherein a second central opening (2021) is arranged in the center of the lower end cap (202), wherein the central support element (204) is arranged midway between the upper end cap (201) and the lower end cap (202), wherein the filter material (203) is arranged circumferentially between the upper end cap (201) and the lower end cap (202), wherein the central support element (204) is provided circumferentially with a water-blocking filter screen (2041), and wherein a drain hole (2022) is arranged in the lower end cap (202), the drain hole (2022) being located between the filter material (203) and the central support element. (204) is orderedwherein the upper end cap (201) is sealedly connected to the base (101) at the first central opening (2011), wherein the outer edge of the lower end cap (202) is sealedly connected to the bottom cover (102), wherein the base (101) is provided with a liquid inlet opening (1011) above the upper end cap (201), and wherein the base (101) is provided with a liquid outlet opening (1012) above the inside of the central support element (204). The water level sensor (3) comprises a first electrode (301), a second electrode (302), a conductive element (303), and an annular conductive sheet (304), wherein the first electrode (301) is arranged within the central column (1013), the lower end of the first electrode (301) projecting beyond the lower end of the central column (1013), the upper end of the first electrode (301) projecting beyond the upper end of the central column (1013), the conductive element (303) being conically tubular, the large opening of the conductive element (303) being mounted upwards in the second central opening (2021), the central column (1013) passing downwards through the conductive element (303), and a contact sheet (3031) being arranged at the upper end of the conductive element (303). wherein the ring-shaped conductive sheet (304) is encased on the central column (1013),wherein the contact plate (3031) is in contact with the annular conductive plate (304), wherein the upper end of the annular conductive plate (304) is connected to the lower end of the second electrode (302), wherein the upper end of the second electrode (302) extends beyond the top of the base (101).

Description

TECHNICAL AREA

[0001] The present utility model relates to the technical field of physics, in particular to filters, more precisely to a filter with a water level sensor. STATE OF THE ART

[0002] In the prior art, utility model patent number CN213280100U discloses a diesel filter in which one end of the two pins of the water level sensor is connected to the fitting on the bracket by a screw, and the other end is located in the oil outlet pipe body and extends beneath it. When the water surface in the water reservoir comes into contact with the two pins of the water level sensor, the pins are activated, causing the sensor to emit a signal to remind the driver to drain the water. However, the two pins of the water level sensor must be precisely aligned during installation to ensure correct positioning. Installation is relatively difficult and involves many parts, resulting in a relatively complex structure. CONTENTS OF THE PRESENT USE SAMPLE

[0003] The purpose of the present utility model is to provide a filter with a water level sensor, so that the technical problem of the difficult mounting of the water level sensor on the filter element in the prior art can be solved by such a filter with a water level sensor.

[0004] Filter with a water level sensor according to the present utility model, comprising a housing, a filter element and a water level sensor, wherein the housing comprises a base and a bottom cover, the bottom cover being mounted below the base, and a downward-pointing central column being arranged on the inside of the base, wherein the filter element comprises an upper end cap, a lower end cap, a filter material and a central support element, wherein a first central opening is arranged in the center of the upper end cap, wherein a second central opening is arranged in the center of the lower end cap, wherein the central support element is arranged in the middle between the upper end cap and the lower end cap, wherein the filter material is arranged around the circumference between the upper end cap and the lower end cap, wherein the central support element is provided circumferentially with a water-blocking filter screen, wherein a drain hole is arranged in the lower end cap, wherein the drain hole is arranged between the filter material and the central support element, wherein the upper end cap is sealed to the base at the first central opening, and wherein the outer edge of the lower end cap is sealed to the bottom cover.wherein the base is provided with a liquid inlet opening above the upper end cap, wherein the base is provided with a liquid outlet opening above the inside of the central support element, wherein the water level sensor comprises a first electrode, a second electrode, a conductive element and an annular conductive sheet, wherein the first electrode is arranged inside the central column, wherein the lower end of the first electrode projects beyond the lower end of the central column, wherein the upper end of the first electrode projects beyond the upper end of the central column, wherein the conductive element is conically tubular, wherein the large opening of the conductive element is mounted facing upwards in the second central opening, wherein the central column extends downwards through the conductive element, wherein a contact sheet is arranged at the upper end of the conductive element, wherein the annular conductive sheet is encased on the central column, and wherein the contact sheet is in contact with the annular conductive sheet.wherein the upper end of the annular conductive sheet is connected to the lower end of the second electrode, the upper end of the second electrode extending beyond the top of the base.

[0005] Furthermore, it is provided that the bottom cover is equipped with a water drain screw plug.

[0006] Furthermore, it is provided that the base is screwed to the bottom cover, with a first sealing ring arranged between the base and the bottom cover.

[0007] Furthermore, it is provided that the base is provided with a first annular column on the circumference of the central column, wherein the liquid outlet opening is arranged between the first annular column of the base and the central column, wherein a second sealing ring is arranged between the first central opening and the first annular column.

[0008] Furthermore, it is provided that a third sealing ring is arranged between the lower end cap and the bottom cover.

[0009] Furthermore, it is provided that the base is provided with a second annular column on the circumference of the first annular column, wherein the upper end of the upper end cap rests against the lower end of the second annular column, wherein the liquid inlet opening is arranged between the second annular column and the first annular column, and wherein a recess is arranged at the lower end of the second annular column.

[0010] Furthermore, it is provided that the annular conductive sheet has an annular section, wherein a connecting section is arranged at the upper end of the annular section, wherein a notch is arranged on one side of the annular section.

[0011] Furthermore, it is provided that a bending section is arranged on the underside of the conductive element.

[0012] Furthermore, it is provided that a raised section is arranged on the side of the conductive element.

[0013] Furthermore, it is provided that an elastic sheet is arranged on the side of the conductive element, wherein the lower end of the elastic sheet is firmly connected to the conductive element, and the upper end of the elastic sheet is tilted outwards.

[0014] Compared to the prior art, the present utility model has positive and obvious effects. In the present utility model, a conductive element is arranged at the lower end cap of the filter element and another conductive element is located on the central column. It is only necessary to align the center of the filter element with the central column for assembly, thus avoiding the problem of positioning difficulties. The first and second electrodes protrude from the upper end of the base and are connected to the outside to detect the water level, resulting in a simple and reliable structure with few parts. BRIEF DESCRIPTION OF THE DRAWING Fig. Figure 1 is a schematic representation of the structure according to the present utility model; Fig. Figure 2 is an exploded view of the structure of a filter element according to the present utility model; Fig. Figure 3 is a schematic representation of the structure of an annular conductive sheet according to embodiment 1 of the present utility model; Fig. Figure 4 is a schematic representation of the structure of an annular conductive sheet according to embodiment 2 of the present utility model; Fig. Figure 5 is a schematic representation of the structure of a conductive element according to embodiment 3 of the present utility model; Fig. Figure 6 is a schematic representation of the structure of a conductive element according to embodiment 4 of the present utility model; Fig. Figure 7 is a schematic representation of the structure of a conductive element according to embodiment 5 of the present utility model.

[0015] Reference numerals: 1. Housing; 101. Base; 1011. Liquid inlet opening; 1012. Liquid outlet opening; 1013. Central column; 1014. First annular column; 1015. Second annular column; 1016. Recess; 102. Bottom cover; 1021. Water drain screw plug; 103. First sealing ring; 104. Liquid inlet chamber; 105. Water distribution chamber; 106. Liquid outlet chamber; 107. Water collection chamber;

[0016] 2. Filter element; 201. Upper end cap; 2011. First central opening; 202. Lower end cap; 2021. Second central opening; 2022. Drain hole; 203. Filter material; 204. Central support element; 2041. Water-repellent filter screen; 205. Second sealing ring; 206. Third sealing ring;

[0017] 3. Water level sensor; 301. First electrode; 302. Second electrode; 303. Conductive element; 3031. Contact plate; 3032. Bend section; 3033. Raise; 3034. Elastic sheet; 304. Ring-shaped conductive plate; 3041. Ring-shaped section; 3042. Connecting section; 3043. Notch. DETAILED DESCRIPTION

[0018] The present utility model is further explained below in conjunction with the drawings and embodiments, but this does not limit the present utility model. Example 1

[0019] Filter with a water level sensor according to the present utility model, comprising a housing 1, a filter element 2 and a water level sensor 3, as shown in Fig. 1 to Fig. 3 shown, wherein the housing 1 comprises a base 101 and a bottom cover 102, wherein the bottom cover 102 is mounted below the base 101, wherein a downwardly directed central column 1013 is arranged on the inside of the base 101, wherein the filter element 2 comprises an upper end cap 201, a lower end cap 202, a filter material 203 and a central support element 204, wherein a first central opening 2011 is arranged in the center of the upper end cap 201, wherein a second central opening 2021 is arranged in the center of the lower end cap 202, wherein the central support element 204 is arranged in the center between the upper end cap 201 and the lower end cap 202, wherein the filter material 203 is arranged around the circumference between the upper end cap 201 and the lower end cap 202, wherein the central support element 204 is provided circumferentially with a water-blocking filter screen 2041, wherein a drain hole 2022 is arranged in the lower end cap 202, wherein the drain hole 2022 is arranged between the filter material 203 and the central support element 204, and wherein the upper end cap 201 is attached to the first central opening 2011 is sealed to the base 101,wherein the outer edge of the lower end cap 202 is sealed to the bottom cover 102, wherein the base 101 is provided with a liquid inlet opening 1011 above the upper end cap 201, wherein the base 101 is provided with a liquid outlet opening 1012 above the inside of the central support element 204, wherein the water level sensor 3 comprises a first electrode 301, a second electrode 302, a conductive element 303 and an annular conductive sheet 304, wherein the first electrode 301 is arranged within the central column 1013, wherein the lower end of the first electrode 301 projects beyond the lower end of the central column 1013, wherein the upper end of the first electrode 301 projects beyond the upper end of the central column 1013, wherein the conductive element 303 is conically tubular, wherein the large opening of the conductive element 303 is mounted upwards in the second central opening 2021, wherein the central column 1013 extends downwards through the conductive element 303, wherein a contact sheet 3031 is arranged at the upper end of the conductive element 303, and wherein the annular conductive sheet 304 is mounted on the central Column 1013 is encased, with the contact plate 3031 being in contact with the annular conductive plate 304,wherein the upper end of the annular conductive sheet 304 is connected to the lower end of the second electrode 302, the upper end of the second electrode 302 extending beyond the top of the base 101.

[0020] Furthermore, it is provided that the bottom cover 102 is fitted with a water drain screw plug 1021.

[0021] Furthermore, it is provided that the base 101 is screwed to the bottom cover 102, with a first sealing ring 103 being arranged between the base 101 and the bottom cover 102.

[0022] Furthermore, it is provided that the base 101 is provided with a first annular column 1014 on the circumference of the central column 1013, wherein the liquid outlet opening 1012 is arranged between the first annular column 1014 of the base 101 and the central column 1013, wherein a second sealing ring 205 is arranged between the first central opening 2011 and the first annular column 1014.

[0023] Furthermore, it is provided that a third sealing ring 206 is arranged between the lower end cap 202 and the bottom cover 102.

[0024] Furthermore, it is provided that the base 101 is provided with a second annular column 1015 on the circumference of the first annular column 1014, wherein the upper end of the upper end cap 201 rests against the lower end of the second annular column 1015, wherein the liquid inlet opening 1011 is arranged between the second annular column 1015 and the first annular column 1014, and wherein a recess 1016 is arranged at the lower end of the second annular column 1015.

[0025] In the assembly of the present utility model, the first electrode 301 and the second electrode 302 are first mounted on the base 101. The annular conductive sheet 304 is sheathed on the central column 1013 to make contact with the second electrode 302. Subsequently, the upper end cap 201, the lower end cap 202, the central support element 204, and the filter material 203 of the filter element 2 are joined together. The large opening of the conductive element 303 is oriented upwards and mounted within the second central opening 2021. The first central opening 2011 of the upper end cap 201 is aligned with the central column 1013 of the base 101 such that the central column 1013 penetrates the second central opening 2021. The contact plate of the conductive element 303 is in contact with the ring-shaped conductive plate 304. Finally, the bottom cover 102 is attached to complete the assembly of the filter.

[0026] A second annular column 1015 is arranged on the base 101, so that the underside of the second annular column 1015 can rest against the top of the upper end cap 201, which facilitates the positioned mounting of the filter element 2. After the bottom cover 102 is mounted, the filter element 2 can be pressed upwards through the bottom cover 102 to fix the filter element 2 in place.

[0027] After assembly of the present utility model, a liquid inlet chamber 104 is formed between the outer surface of the filter material 203 and the upper end cap 201. The liquid to be filtered, entering the liquid inlet opening 1011, can enter the liquid inlet chamber through a recess 1016 below the upper end cap 201. A water distribution chamber 105 is formed between the filter material 203 of the filter element 2 and the central support element 204. A liquid outlet chamber 106 is formed between the inner surface of the central support element 204 of the filter element 2 and the base 101. A water collection chamber 107 is formed between the lower end cap 202 and the bottom cover 102. The filter material 203 is connected to the upper end cap 201 and the lower end cap 202 by welding or gluing, so that the liquid inlet chamber 104 is spaced apart from the water distribution chamber 105.The central support element 204 is connected to the upper end cap 201 and the lower end cap 202 by welding or bonding, such that the water distribution chamber 105 is spaced apart from the liquid outlet chamber 106. Drainage holes 2022 are arranged on the outside of the welded or bonded area of ​​the central support element 204 of the lower end cap 202 and on the inside of the welded or bonded area of ​​the filter material 203. The liquid inlet chamber 104 is spaced apart from the liquid outlet chamber 106 by the second sealing ring 205. The liquid inlet chamber 104 is spaced apart from the water collection chamber 107 by the third sealing ring 206.

[0028] For the purposes of this utility model, diesel fuel is used as an example of the liquid to be filtered. Diesel has a lower specific gravity than water and is not electrically conductive. The diesel to be filtered enters the liquid inlet chamber 104 through the liquid inlet opening 1011 and, after passing through the filter material 203, enters the water distribution chamber 105. The water is separated from the liquid to be filtered by the filter material 203. The separated water is blocked by the filter screen and subjected to the action of gravity, sinking through the drain hole 2022 into the water collection chamber 107. At the same time, diesel also enters the water collection chamber 107 and covers the water.Under the pressure exerted by the liquid inlet opening 1011, the filtered diesel passes through the water-blocking filter screen into the liquid outlet chamber 106 and is fed to the demand side via the liquid outlet opening 1012. When the water level in the water collection chamber 107 accumulates to a height exceeding the lower end of the conductive element 303 and the first electrode 301, the resistance between the first electrode 301 and the second electrode 302 decreases, triggering a water level alarm. The water drain plug is then opened manually or automatically to allow the water to drain to the outside. Example 2

[0029] According to the present embodiment, the annular conductive sheet 304 has an annular section 3041, wherein a connecting section 3042 is arranged at the upper end of the annular section 3041, and wherein a notch 3043 is arranged on one side of the annular section 3041, as shown in Fig. 4 shown.

[0030] The connecting section 3042 can come into contact with the second electrode 302 to conduct electricity when the annular conductive sheet 304 is assembled outside the central column 1013. The annular section 3041 is provided with a notch 3043 that facilitates elastic deformation of the annular section 3041, allowing the annular conductive sheet 304 to be elastically clamped outside the central column 1013. Example 3

[0031] According to the present embodiment, a bending section 3032 is arranged on the underside of the conductive element 303, as shown in Fig. 5 shown.

[0032] After the conductive element 303 is assembled into the second central opening 2021, the large opening of the conical tubular structure of the conductive element 303 is located above the second central opening 2021, and the bent section 3032 of the conductive element 303 is located below the second central opening 2021. The bent section 3032 is bent in such a way that the conductive element 303 can be firmly connected to the lower end cap 202 of the filter element 2. Example 4

[0033] According to the present embodiment, a protrusion 3033 is arranged on the side of the conductive element 303, as shown in Fig. 6 shown.

[0034] When the conductive element 303 is mounted to the second central opening 2021, the large opening of the conical tubular structure of the conductive element 303 is located above the second central opening 2021, and the protrusion 3033 is clamped below the second central opening 2021, so that the conductive element 303 is firmly connected to the lower end cap 202. Example 5

[0035] According to the present embodiment, an elastic sheet 3034 is arranged on the side of the conductive element 303, wherein the lower end of the elastic sheet 3034 is firmly connected to the conductive element 303, and wherein the upper end of the elastic sheet 3034 is tilted outwards, as shown in Fig. 7 shown.

[0036] When the conductive element 303 is mounted to the second central opening 2021, the large opening of the conical tubular structure of the conductive element 303 is located above the second central opening 2021, and the elastic sheet 3034 is clamped below the second central opening 2021, so that the conductive element 303 is firmly connected to the lower end cap 202. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 213280100U

[0002] Cited non-patent literature

[0000] Filter element; 201. Upper end cap; 2011. First central opening; 202. Lower end cap; 2021. Second central opening; 2022. Drain hole; 203. Filter material; 204. Central support element; 2041. Water-blocking filter screen; 205. Second sealing ring; 206. Third sealing ring

[0016]

Claims

[1] Filter with a water level sensor, comprising a housing (1), a filter element (2) and a water level sensor (3), characterized by , that the housing (1) comprises a base (101) and a bottom cover (102), wherein the bottom cover (102) is mounted below the base (101), wherein a downwardly directed central column (1013) is arranged on the inside of the base (101), The filter element (2) comprises an upper end cap (201), a lower end cap (202), a filter material (203), and a central support element (204), wherein a first central opening (2011) is arranged in the center of the upper end cap (201), wherein a second central opening (2021) is arranged in the center of the lower end cap (202), wherein the central support element (204) is arranged midway between the upper end cap (201) and the lower end cap (202), wherein the filter material (203) is arranged circumferentially between the upper end cap (201) and the lower end cap (202), wherein the central support element (204) is provided circumferentially with a water-blocking filter screen (2041), and wherein a drain hole (2022) is arranged in the lower end cap (202), the drain hole (2022) being located between the filter material (203) and the central support element. (204) is orderedwherein the upper end cap (201) is sealedly connected to the base (101) at the first central opening (2011), wherein the outer edge of the lower end cap (202) is sealedly connected to the bottom cover (102), wherein the base (101) is provided with a liquid inlet opening (1011) above the upper end cap (201), and wherein the base (101) is provided with a liquid outlet opening (1012) above the inside of the central support element (204). The water level sensor (3) comprises a first electrode (301), a second electrode (302), a conductive element (303), and an annular conductive sheet (304), wherein the first electrode (301) is arranged within the central column (1013), the lower end of the first electrode (301) projecting beyond the lower end of the central column (1013), the upper end of the first electrode (301) projecting beyond the upper end of the central column (1013), the conductive element (303) being conically tubular, the large opening of the conductive element (303) being mounted upwards in the second central opening (2021), the central column (1013) passing downwards through the conductive element (303), and a contact sheet (3031) being arranged at the upper end of the conductive element (303). wherein the ring-shaped conductive sheet (304) is encased on the central column (1013),wherein the contact plate (3031) is in contact with the annular conductive plate (304), wherein the upper end of the annular conductive plate (304) is connected to the lower end of the second electrode (302), wherein the upper end of the second electrode (302) extends beyond the top of the base (101). [2] Filter with a water level sensor according to claim 1, characterized by , that the bottom cover (102) is provided with a water drain screw plug (1021). [3] Filter with a water level sensor according to claim 1, characterized by , that the base (101) is screwed to the bottom cover (102), wherein a first sealing ring (103) is arranged between the base (101) and the bottom cover (102). [4] Filter with a water level sensor according to claim 1, characterized by, that the base (101) is provided with a first annular column (1014) on the circumference of the central column (1013), wherein the liquid outlet opening (1012) is arranged between the first annular column (1014) of the base (101) and the central column (1013), wherein a second sealing ring (205) is arranged between the first central opening (2011) and the first annular column (1014). [5] Filter with a water level sensor according to claim 1, characterized by , that a third sealing ring (206) is arranged between the lower end cap (202) and the bottom cover (102). [6] Filter with a water level sensor according to claim 1, characterized by, that the base (101) is provided with a second annular column (1015) on the circumference of the first annular column (1014), wherein the upper end of the upper end cap (201) rests against the lower end of the second annular column (1015), wherein the liquid inlet opening (1011) is arranged between the second annular column (1015) and the first annular column (1014), wherein a recess (1016) is arranged at the lower end of the second annular column (1015). [7] Filter with a water level sensor according to claim 1, characterized by , that the annular conductive sheet (304) has an annular section (3041) wherein a connecting section (3042) is arranged at the upper end of the annular section (3041) wherein a notch (3043) is arranged on one side of the annular section (3041). [8] Filter with a water level sensor according to claim 1, characterized by, that a bending section (3032) is arranged on the underside of the conductive element (303). [9] Filter with a water level sensor according to claim 1, characterized by , that a protrusion (3033) is arranged on the side of the conductive element (303). [10] Filter with a water level sensor according to claim 1, characterized by , that an elastic sheet (3034) is arranged on the side of the conductive element (303), wherein the lower end of the elastic sheet (3034) is firmly connected to the conductive element (303), and the upper end of the elastic sheet (3034) is tilted outwards.

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