Filter with water level sensor

Abstract

A filter with water level sensor, including shell, filter core and water level sensor, the shell includes base and bottom cover, the bottom cover is installed below the base, the inner side of the base is provided with a downward center column; the filter core includes upper end cover, lower end cover, filter material and center support; the water level sensor includes first electrode, second electrode, conductive part and annular conductive sheet, the first electrode is arranged in the center column, the conductive part is conical tubular structure, the large mouth of the conductive part is installed in the second center hole upwards, the center column passes through the conductive part downwards, the upper end of the conductive part is provided with a contact sheet, the annular conductive sheet is sleeved outside the center column, the contact sheet contacts with the annular conductive sheet, the upper end of the annular conductive sheet is connected with the lower end of the second electrode, and the upper end of the second electrode extends out of the top of the base. The utility model discloses a conductive part is arranged on the lower end cover of filter core, and a conductive part is arranged on the center column, so that the center of the filter core can be installed by aligning with the center column, and the problem of difficult positioning is avoided.

Description

Technical Field

[0001] This utility model relates to the field of physics, and more particularly to filters, especially a filter with a water level sensor. Background Technology

[0002] In the prior art, utility model patent CN213280100U discloses a diesel fuel filter. In this filter, one end of each of the two pins of a water level alarm is connected to a terminal on a bracket via screws, while the other end is located inside the oil outlet pipe and extends downwards. When the water level in the water reservoir is about to contact the two pins of the water level alarm, the pins are activated, and the alarm sends a signal to remind the driver to drain the water. However, the two pins of the water level alarm require precise alignment during installation to accurately locate the correct position, making installation relatively difficult. Furthermore, the installation involves many components and the structure is relatively complex. Summary of the Invention

[0003] The purpose of this invention is to provide a filter with a water level sensor, which solves the technical problem of difficulty in installing the water level sensor on the filter element in the prior art.

[0004] The present invention discloses a filter with a water level sensor, comprising a housing, a filter element, and a water level sensor. The housing includes a base and a bottom cover, the bottom cover being installed below the base, and a downward-facing central column being provided on the inner side of the base.

[0005] The filter element includes an upper end cover, a lower end cover, filter media, and a central support member. The upper end cover has a first central hole in the middle, and the lower end cover has a second central hole in the middle. The central support member is located in the middle between the upper and lower end covers. The filter media is located on the periphery between the upper and lower end covers. The central support member has a water-blocking filter screen arranged circumferentially. The lower end cover has a drain hole located between the filter media and the central support member. The upper end cover is sealed to the base at the first central hole. The outer edge of the lower end cover is sealed to the bottom cover. The base has a liquid inlet above the upper end cover and a liquid outlet above the inner side of the central support member.

[0006] The water level sensor includes a first electrode, a second electrode, a conductive element, and an annular conductive sheet. The first electrode is disposed inside a central column, with its lower end extending beyond the bottom of the central column and its upper end extending beyond the top of the central column. The conductive element is a conical tubular structure, with its large opening facing upward and installed inside a second central hole. The central column passes downward through the conductive element, and a contact piece is disposed at the upper end of the conductive element. The annular conductive sheet is fitted over the central column, and the contact piece contacts the annular conductive sheet. The upper end of the annular conductive sheet is connected to the lower end of the second electrode, and the upper end of the second electrode extends beyond the top of the base.

[0007] Furthermore, the bottom cover is provided with a drain plug.

[0008] Furthermore, the base is threadedly connected to the bottom cover, and a first sealing ring is provided between the base and the bottom cover.

[0009] Furthermore, the base has a first annular column around the central column, the liquid outlet is located between the first annular column and the central column of the base, and a second sealing ring is provided between the first central hole and the first annular column.

[0010] Furthermore, a third sealing ring is provided between the lower end cover and the bottom cover.

[0011] Furthermore, the base is provided with a second annular column around the first annular column, the upper end of the upper cover abuts against the lower end of the second annular column, the liquid inlet is located between the second annular column and the first annular column, and the lower end of the second annular column is provided with a groove.

[0012] Furthermore, the annular conductive sheet includes an annular portion, the upper end of which is provided with a connecting portion, and one side of which is provided with a notch.

[0013] Furthermore, the bottom of the conductive component is provided with a bent portion.

[0014] Furthermore, the conductive element has protrusions on its side.

[0015] Furthermore, an elastic sheet is provided on the side of the conductive element, the lower end of the elastic sheet is fixedly connected to the conductive element, and the upper end of the elastic sheet is raised outward.

[0016] Compared with existing technologies, the advantages of this invention are positive and obvious. This invention features conductive elements on the lower end cap and the central column of the filter element, allowing for easy installation simply by aligning the center of the filter element with the central column, thus avoiding the problem of difficult positioning. The first and second electrodes extend from the top of the base and connect to the outside to detect water level. It has fewer components and a simple and reliable structure. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is an exploded view of the filter element structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the structure of the annular conductive sheet in Embodiment 1 of this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of the annular conductive sheet in Embodiment 2 of this utility model.

[0021] Figure 5 This is a schematic diagram of the conductive component in Embodiment 3 of this utility model.

[0022] Figure 6 This is a schematic diagram of the conductive component in Embodiment 4 of this utility model.

[0023] Figure 7 This is a schematic diagram of the conductive component in Embodiment 5 of this utility model.

[0024] In the diagram, the markings are as follows: 1. Shell; 101. Base; 1011. Liquid inlet; 1012. Liquid outlet; 1013. Central column; 1014. First annular column; 1015. Second annular column; 1016. Groove; 102. Bottom cover; 1021. Drain plug; 103. First sealing ring; 104. Liquid inlet chamber; 105. Water distribution chamber; 106. Liquid outlet chamber; 107. Water collection chamber.

[0025] 2. Filter element; 201. Upper end cap; 2011. First center hole; 202. Lower end cap; 2021. Second center hole; 2022. Drain hole; 203. Filter media; 204. Central support; 2041. Water-blocking filter screen; 205. Second sealing ring; 206. Third sealing ring;

[0026] 3. Water level sensor; 301. First electrode; 302. Second electrode; 303. Conductive component; 3031. Contact piece; 3032. Bending part; 3033. Protrusion; 3034. Elastic piece; 304. Annular conductive piece; 3041. Annular part; 3042. Connecting part; 3043. Notch. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this does not limit the present invention.

[0028] Example 1

[0029] like Figures 1-3 As shown, the present invention discloses a filter with a water level sensor, comprising a housing 1, a filter element 2, and a water level sensor 3.

[0030] The housing 1 includes a base 101 and a bottom cover 102. The bottom cover 102 is installed below the base 101, and a downward-facing central column 1013 is provided on the inner side of the base 101.

[0031] The filter element 2 includes an upper end cover 201, a lower end cover 202, filter media 203, and a central support member 204. The upper end cover 201 has a first central hole 2011 in the center, and the lower end cover 202 has a second central hole 2021 in the center. The central support member 204 is located in the middle between the upper end cover 201 and the lower end cover 202. The filter media 203 is located on the periphery between the upper end cover 201 and the lower end cover 202. The central support member 204 has a circumferentially arranged... The water filter screen 2041 has a drain hole 2022 in the lower end cover 202, which is located between the filter material 203 and the central support member 204. The upper end cover 201 is sealed to the base 101 at the first central hole 2011. The outer edge of the lower end cover 202 is sealed to the bottom cover 102. The base 101 has a liquid inlet 1011 above the upper end cover 201 and a liquid outlet 1012 above the inner side of the central support member 204.

[0032] The water level sensor 3 includes a first electrode 301, a second electrode 302, a conductive element 303, and an annular conductive sheet 304. The first electrode 301 is disposed inside the central column 1013, with its lower end extending out of the bottom end of the central column 1013 and its upper end extending out of the top end of the central column 1013. The conductive element 303 is a conical tubular structure, with its large opening facing upward and installed inside the second central hole 2021. The central column 1013 passes downward through the conductive element 303, and a contact piece 3031 is disposed at the upper end of the conductive element 303. The annular conductive sheet 304 is sleeved outside the central column 1013, and the contact piece 3031 contacts the annular conductive sheet 304. The upper end of the annular conductive sheet 304 is connected to the lower end of the second electrode 302, and the upper end of the second electrode 302 extends out of the top of the base 101.

[0033] Furthermore, the bottom cover 102 is provided with a drain plug 1021.

[0034] Furthermore, the base 101 is threadedly connected to the bottom cover 102, and a first sealing ring 103 is provided between the base 101 and the bottom cover 102.

[0035] Furthermore, the base 101 is provided with a first annular column 1014 around the central column 1013, the liquid outlet 1012 is provided between the first annular column 1014 and the central column 1013 of the base 101, and a second sealing ring 205 is provided between the first central hole 2011 and the first annular column 1014.

[0036] Furthermore, a third sealing ring 206 is provided between the lower end cover 202 and the bottom cover 102.

[0037] Furthermore, the base 101 is provided with a second annular post 1015 around the first annular post 1014, the upper end of the upper cover 201 abuts against the lower end of the second annular post 1015, the liquid inlet 1011 is located between the second annular post 1015 and the first annular post 1014, and the lower end of the second annular post 1015 is provided with a groove 1016.

[0038] During assembly, the first electrode 301 and the second electrode 302 are first installed on the base 101. The annular conductive sheet 304 is then placed around the central post 1013 and contacts the second electrode 302. The upper end cover 201, the lower end cover 202, the central support 204, and the filter material 203 of the filter element 2 are then assembled together. The conductive sheet 303 is installed with its large opening facing upwards in the second central hole 2021. The first central hole 2011 of the upper end cover 201 is aligned with the central post 1013 of the base 101, so that the central post 1013 passes through the second central hole 2021. The contact piece of the conductive sheet 303 contacts the annular conductive sheet 304. Finally, the bottom cover 102 is installed to complete the installation of the filter.

[0039] A second annular post 1015 is provided on the base 101 so that the bottom of the second annular post 1015 abuts against the top of the upper end cover 201, which facilitates the positioning and installation of the filter element 2. After the bottom cover 102 is installed, the filter element 2 can be fixed by pressing the bottom cover 102 upward.

[0040] After assembly, the present invention forms an inlet chamber 104 between the outer side of the filter material 203 and the upper end cover 201. The liquid to be filtered entering through the inlet 1011 can enter the inlet chamber through the groove 1016 below the upper end cover 201. A water distribution chamber 105 is formed between the filter material 203 of the filter element 2 and the central support member 204. An outlet chamber 106 is formed between the inner side of the central support member 204 of the filter element 2 and the base 101. A water collection chamber 107 is formed between the lower end cover 202 and the bottom cover 102. The filter media 203 is connected to the upper end cover 201 and the lower end cover 202 by welding or bonding, thus separating the liquid inlet chamber 104 from the water distribution chamber 105; the central support member 204 is connected to the upper end cover 201 and the lower end cover 202 by welding or bonding, thus separating the water distribution chamber 105 from the liquid outlet chamber 106; a drain hole 2022 is opened on the outer side of the welding or bonding area of ​​the central support member 204 of the lower end cover 202 and on the inner side of the welding or bonding area of ​​the filter media 203; the liquid inlet chamber 104 and the liquid outlet chamber 106 are separated by a second sealing ring 205; the liquid inlet chamber 104 and the water collection chamber 107 are separated by a third sealing ring 206.

[0041] When this utility model is used, taking diesel as an example, diesel is lighter than water and does not conduct electricity. The diesel to be filtered enters the inlet chamber 104 through the inlet 1011, passes through the filter material 203, and enters the water separation chamber 105. The water is separated from the liquid to be filtered by the filter material 203. The separated water sinks into the water collection chamber 107 through the drain hole 2022 due to the obstruction of the filter screen and the effect of gravity. At the same time, the diesel will also enter the water collection chamber 107 and cover the water. Under the pressure of the inlet 1011, the filtered diesel will enter the outlet chamber 106 through the water blocking screen and be supplied to the demand side through the outlet 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, indicating a water level alarm. The drain plug can be opened manually or automatically to drain the water to the outside.

[0042] Example 2

[0043] like Figure 4 As shown, the annular conductive sheet 304 in this embodiment includes an annular portion 3041, a connecting portion 3042 is provided at the upper end of the annular portion 3041, and a notch 3043 is provided on one side of the annular portion 3041.

[0044] When the annular conductive sheet 304 is installed outside the central post 1013, it can make contact with the second electrode 302 for conduction through the connecting part 3042. The annular part 3041 is provided with a notch 3043 to facilitate elastic deformation of the annular part 3041, so that the annular conductive sheet 304 can be elastically locked outside the central post 1013.

[0045] Example 3

[0046] like Figure 5 As shown, the bottom of the conductive component 303 in this embodiment is provided with a bent portion 3032.

[0047] After the conductive component 303 is installed into the second central hole 2022, the large opening of the conical tube structure of the conductive component 303 is located above the second central hole 2022, and the bent part 3032 of the conductive component 303 is located below the second central hole 2022. After bending the bent part 3032, the conductive component 303 can be firmly connected to the lower end cover 202 of the filter element 2.

[0048] Example 4

[0049] like Figure 6 As shown, the conductive element 303 in this embodiment has protrusions 3033 on its side.

[0050] When the conductive element 303 is installed into the second central hole 2022, the large opening of the conical tube structure of the conductive element 303 is located above the second central hole 2022, and the protrusion 3033 is stuck below the second central hole, so that the conductive element 303 is firmly connected to the lower end cover 202.

[0051] Example 5

[0052] like Figure 7 As shown, in this embodiment, the conductive element 303 has an elastic sheet 3034 on its side. The lower end of the elastic sheet 3034 is fixedly connected to the conductive element 303, and the upper end of the elastic sheet 3034 is raised outward.

[0053] When the conductive element 303 is installed into the second central hole 2022, the large opening of the conical tube structure of the conductive element 303 is located above the second central hole 2022, and the elastic sheet 3034 is stuck below the second central hole 2022, so that the conductive element 303 is firmly connected to the lower end cover 202.

Claims

1. A filter with a water level sensor, characterized in that, include: The system comprises a housing (1), a filter element (2), and a water level sensor (3). The housing (1) includes a base (101) and a bottom cover (102). The bottom cover (102) is installed below the base (101). A downward-facing central column (1013) is provided on the inner side of the base (101). The filter element (2) includes an upper end cover (201), a lower end cover (202), a filter material (203), and a central support (204). A first central hole (2011) is provided in the middle of the upper end cover (201), and a second central hole (2021) is provided in the middle of the lower end cover (202). The central support... The component (204) is positioned between the upper end cover (201) and the lower end cover (202). The filter material (203) is positioned on the periphery between the upper end cover (201) and the lower end cover (202). The central support component (204) is provided with a water-blocking filter screen (2041) along its circumference. The lower end cover (202) is provided with a drain hole (2022) located between the filter material (203) and the central support component (204). The upper end cover (201) is sealed to the base (101) at the first central hole (2011). The outer edge of the lower end cover (202) is connected to the bottom cover. (102) Sealed connection, the base (101) is provided with an inlet (1011) above the upper end cover (201), and the base (101) is provided with an outlet (1012) above the inner side of the central support (204); the water level sensor (3) includes a first electrode (301), a second electrode (302), a conductive element (303) and an annular conductive sheet (304), the first electrode (301) is disposed in the central column (1013), the lower end of the first electrode (301) extends out of the bottom end of the central column (1013), and the upper end of the first electrode (301) extends out of the central column (1013). At the top of 13), the conductive element (303) is a conical tube structure. The large opening of the conductive element (303) is installed in the second central hole (2021) with the large opening facing upward. The central column (1013) passes downward through the conductive element (303). A contact piece (3031) is provided at the upper end of the conductive element (303). The annular conductive piece (304) is sleeved outside the central column (1013). The contact piece (3031) contacts the annular conductive piece (304). The upper end of the annular conductive piece (304) is connected to the lower end of the second electrode (302). The upper end of the second electrode (302) extends out of the top of the base (101).

2. The filter with a water level sensor as described in claim 1, characterized in that: The bottom cover (102) is provided with a drain plug (1021).

3. The filter with a water level sensor as described in claim 1, characterized in that: The base (101) is threadedly connected to the bottom cover (102), and a first sealing ring (103) is provided between the base (101) and the bottom cover (102).

4. The filter with a water level sensor as described in claim 1, characterized in that: The base (101) has a first annular column (1014) around the central column (1013), the liquid outlet (1012) is located between the first annular column (1014) and the central column (1013) of the base (101), and a second sealing ring (205) is provided between the first central hole (2011) and the first annular column (1014).

5. The filter with a water level sensor as described in claim 1, characterized in that: A third sealing ring (206) is provided between the lower end cover (202) and the bottom cover (102).

6. The filter with a water level sensor as described in claim 1, characterized in that: The base (101) has a second annular column (1015) around the first annular column (1014). The upper end of the upper cover (201) abuts against the lower end of the second annular column (1015). The liquid inlet (1011) is located between the second annular column (1015) and the first annular column (1014). The lower end of the second annular column (1015) is provided with a groove (1016).

7. The filter with a water level sensor as described in claim 1, characterized in that: The annular conductive sheet (304) includes an annular portion (3041), the upper end of the annular portion (3041) is provided with a connecting portion (3042), and a notch (3043) is provided on one side of the annular portion (3041).

8. The filter with a water level sensor as described in claim 1, characterized in that: The bottom of the conductive component (303) is provided with a bent portion (3032).

9. The filter with a water level sensor as described in claim 1, characterized in that: The conductive element (303) has protrusions (3033) on its side.

10. The filter with a water level sensor as described in claim 1, characterized in that: The conductive element (303) has an elastic sheet (3034) on its side. The lower end of the elastic sheet (3034) is fixedly connected to the conductive element (303), and the upper end of the elastic sheet (3034) is raised outward.

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