An antifreeze filter

Abstract

The utility model discloses an antifreeze filter, which belongs to the technical field of filters. It includes a filter seat with a water inlet and a water outlet, a filter housing integrally connected with the filter seat, and a filter element arranged in the filter housing and connected to the inside of the filter seat, a water storage space is provided between the filter element and the inner wall of the filter housing, and an antifreeze cracking mechanism is provided in the water storage space, and the antifreeze cracking mechanism includes a piston disc and a telescopic member. A movable expandable space is constructed in the water storage space by the piston disc and the telescopic member, and the volume of the water continuously expands during the process of freezing when the temperature decreases, and the piston disc continuously moves downward to balance the pressure in the water storage space above the piston disc, until all the water in the water storage space above the piston disc freezes and the expansion stops, and the pressure no longer rises, so that the volume of the water in the filter housing that freezes and expands is offset by the volume increased by the piston disc compressing the telescopic member downward, thereby avoiding the rupture of the filter element and the filter housing.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to an antifreeze filter. Background Art

[0002] In order to ensure that water meets usage requirements, filters are installed in many water pipes to filter out impurities in the water. Figure 1 The figure shows a schematic diagram of the structure of an existing commercially available pre-filter, which mainly includes a filter seat 1, a filter element 2, a filter housing 3, a flushing valve 4 and other structures. When water flows into the filter seat 1 through the water inlet 11 and is filtered and purified by the filter element 2, it enters the filter housing 3 and finally flows out from the water outlet 12 for use.

[0003] Filters of this structure all have a common disadvantage. In winter in some areas, the temperature drops to around minus ten degrees Celsius, and in some areas even drops to minus twenty to thirty degrees Celsius. Water freezes at sub-zero temperatures. Since the density of ice is less than that of water, the volume of water expands after it freezes. The volume expansion can easily cause the filter element and body of the filter to rupture, resulting in water leakage and shortening the service life of the filter. Utility Model Content

[0004] The purpose of the utility model is to provide an antifreeze filter, aiming to at least solve the technical problems existing in the above-mentioned prior art. To achieve the above-mentioned purpose, the technical solutions adopted by the utility model are as follows:

[0005] An antifreeze filter comprises a filter seat having a water inlet and a water outlet, a filter housing integrally connected to the filter seat, and a filter element disposed in the filter housing and communicating with the interior of the filter seat, a water storage space being provided between the filter element and the inner wall of the filter housing, an antifreeze cracking mechanism being provided in the water storage space, and the antifreeze cracking mechanism comprising:

[0006] A piston disc, the piston disc being slidably fitted to the inner wall of the filter housing, and the piston disc being located directly below the filter element;

[0007] A telescopic member, one end of which is fixedly connected to the bottom of the piston disc, and the other end of which is fixedly connected to the bottom of the filter housing.

[0008] As a further solution of the utility model: the telescopic member is a No. 1 spring, the top end of the No. 1 spring is fixedly connected to the bottom of the piston disc, and the bottom end of the No. 1 spring is fixedly connected to the bottom of the filter housing.

[0009] As a further solution of the utility model: the telescopic part includes a plurality of guide cylinders evenly distributed on the bottom of the filter housing, a No. 2 spring is provided in the cavity in each of the guide cylinders, the bottom end of the No. 2 spring is fixedly connected to the bottom of the cavity, the top end of the No. 2 spring is fixedly connected to a lifting column, and the end of the lifting column away from the No. 2 spring is fixedly connected to the bottom of the piston disk.

[0010] As a further solution of the utility model: the height of the guide cylinder does not exceed half of the maximum vertical distance between the bottom of the piston disc and the bottom of the filter housing.

[0011] As a further solution of the utility model: the anti-freeze cracking mechanism also includes a sealing ring, which is arranged on the outer edge of the piston disk and slidably fits the inner wall of the filter housing.

[0012] As a further solution of the utility model: the anti-freeze cracking mechanism also includes a guide rod, the top end of the guide rod is fixedly connected to the center of the bottom of the piston disk, and the bottom end of the guide rod movably passes through the bottom of the filter housing and extends to the outside of the filter housing.

[0013] As a further solution of the utility model: the antifreeze filter also includes a flushing valve, a flushing channel is opened inside the guide rod, the top port of the flushing channel is connected to the top of the piston disk, and the bottom port of the flushing channel is connected to the water inlet of the flushing valve.

[0014] As a further solution of the utility model: the piston disc is a hemispherical body, and the spherical surface is arranged downward.

[0015] The utility model has the following beneficial effects:

[0016] The utility model provides an anti-freezing crack mechanism in the water storage space between the filter element and the inner wall of the filter housing, the anti-freezing crack mechanism includes a piston disc and a telescopic member, the piston disc is slidably fitted to the inner wall of the filter housing, the piston disc is located directly below the filter element, one end of the telescopic member is fixedly connected to the bottom of the piston disc, and the other end of the telescopic member is fixedly connected to the bottom of the filter housing. A movable expandable space is constructed in the water storage space by the piston disc and the telescopic member, when the water is not frozen, the piston disc is in a high position under the action of the telescopic member, when the temperature is lowered and the water freezes into ice, the volume of the piston disc continues to expand, the pressure in the water storage space above the piston disc continues to rise and press the piston disc, the piston disc compresses the telescopic member, the piston disc continuously moves down to balance the pressure in the water storage space above the piston disc, until the water in the water storage space above the piston disc is completely frozen and the expansion stops and the pressure does not rise any more, so that the volume of the water in the filter housing frozen and expanded is offset by the volume increased by the piston disc compressing the telescopic member downward, so as to avoid the rupture of the filter element and the filter housing, and prevent the filter from being frozen in areas with extremely low temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the filter structure in the prior art;

[0019] Figure 2 This is a schematic diagram of the internal structure of the antifreeze filter in the first embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the antifreeze filter of the second embodiment of the utility model;

[0021] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure in the middle.

[0022] In the figure: 1. filter seat; 11. water inlet; 12. water outlet; 2. filter element; 3. filter housing; 4. flushing valve; 5. water storage space; 6. anti-freeze cracking mechanism; 61. piston disc; 62. No. 1 spring; 63. guide cylinder; 64. No. 2 spring; 65. lifting column; 66. sealing ring; 67. guide rod; 671. flushing channel. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation. Therefore, it should not be understood as a limitation on the present invention.

[0025] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0026] Embodiment 1

[0027] See also Figure 2 As shown, an antifreeze filter provided by an embodiment of the utility model may at least include a filter seat 1, a filter housing 3, a filter element 2 and an antifreeze cracking mechanism 6. The two ends of the filter seat 1 are respectively connected with a water inlet 11 and a water outlet 12, the filter housing 3 is integrally connected with the outer periphery of the middle section of the filter seat 1, the filter element 2 is arranged in the filter housing 3 and communicated with the inside of the filter seat 1, and a water storage space 5 is provided between the filter element 2 and the inner wall of the filter housing 3.

[0028] Water in the external pipeline flows into the inner cavity of the filter seat 1 from the water inlet 11, is filtered and purified by the filter element 2, flows into the water storage space 5 between the filter element 2 and the inner wall of the filter housing 3, and finally flows out from the water outlet 12 for people to use.

[0029] The key point of the utility model is that an anti-freezing cracking mechanism 6 is provided in the water storage space 5, and the anti-freezing cracking mechanism 6 can prevent the volume expansion of the water in the water storage space 5 after freezing, so as to prevent the filter element 2 and the filter housing from being broken.

[0030] The anti-freezing and cracking mechanism 6 comprises a piston disc 61 and a telescopic member.

[0031] The piston disk 61 is slidably fitted to the inner wall of the filter housing 3. The piston disk 61 is located directly below the filter element 2. The piston disk 61 can be but is not limited to a hemispherical body, and the spherical surface is set downward. The outer edge of the piston disk 61 is sealed to the inner wall of the filter housing 3 to ensure that water above the piston disk 61 will not leak downward from the edges around the piston disk 61.

[0032] One end of the telescopic member is fixedly connected to the bottom of the piston disc 61 , and the other end of the telescopic member is fixedly connected to the bottom of the filter housing 3 . The telescopic member can be telescoped synchronously with the up and down movement of the piston disc 61 .

[0033] See also Figure 2 As shown, in this embodiment, the telescopic member is a No. 1 spring 62 , the top end of the No. 1 spring 62 is fixedly connected to the bottom of the piston disc 61 , and the bottom end of the No. 1 spring 62 is fixedly connected to the bottom of the filter housing 3 .

[0034] A movable expandable space is constructed in the water storage space 5 by the piston disc 61 and the spring. When the water is not frozen, the piston disc 61 is in a high position under the action of the spring. When the temperature drops, the volume of the water continues to expand during the process of freezing. The pressure in the water storage space 5 above the piston disc 61 continues to rise and presses the piston disc 61. The piston disc 61 compresses the spring 62. The piston disc 61 continues to move downward to balance the pressure in the water storage space 5 above the piston disc 61 until all the water in the water storage space 5 above the piston disc 61 freezes and the expansion stops, and the pressure no longer rises. In this way, the volume of the water in the filter housing that is frozen and expanded is offset by the increased volume caused by the piston disc 61 compressing the spring 62 that moves downward, thereby preventing the filter element 2 and the filter housing from rupturing.

[0035] Furthermore, in this embodiment, the anti-freeze crack mechanism 6 also includes a sealing ring 66, which is arranged on the outer edge of the piston disk 61, and the sealing ring 66 slides in contact with the inner wall of the filter housing 3. The setting of the sealing ring 66 can further improve the sealing between the outer edge of the piston disk 61 and the inner wall of the filter housing 3.

[0036] Furthermore, in this embodiment, the anti-freeze crack mechanism 6 also includes a guide rod 67, the top end of the guide rod 67 is fixedly connected to the bottom center of the piston disk 61, and the bottom end of the guide rod 67 is movable through the bottom of the filter housing 3 and extends to the outside of the filter housing 3. The setting of the guide rod 67 can prevent the piston disk 61 from shifting during the downward movement due to uneven force, so that the piston disk 61 always moves up and down in the vertical direction.

[0037] Furthermore, in this embodiment, the antifreeze filter also includes a flushing valve 4, a flushing channel 671 is opened inside the guide rod 67, the top port of the flushing channel 671 is connected to the top of the piston disk 61, and the bottom port of the flushing channel 671 is connected to the water inlet 11 of the flushing valve 4.

[0038] When it is necessary to flush the filter seat 1, the filter housing 3, the filter element 2 and the piston disc 61, open the flushing valve 4, add the cleaning water from the water inlet 11, and the cleaning water passes through the inner cavity of the filter seat 1, the filter element 2 and the water storage space 5 above the piston disc 61, and finally flows from the flushing channel 671 inside the guide rod 67 to the flushing valve 4 and is discharged from the flushing valve 4.

[0039] Embodiment 2

[0040] See also Figure 3 , Figure 4 As shown, the difference between the second embodiment and the first embodiment is that the specific arrangement of the telescopic member is different, and the arrangement of other structures is the same. The telescopic member will be described in detail below.

[0041] In this embodiment, the telescopic member includes a plurality of guide cylinders 63 evenly distributed at the bottom of the filter housing 3, which may be three to six guide cylinders 63 evenly arranged in a ring shape at the bottom of the filter housing 3. A No. 2 spring 64 is provided in the cavity in each guide cylinder 63. The bottom end of the No. 2 spring 64 is fixedly connected to the bottom of the cavity, and a lifting column 65 is fixedly connected to the top of the No. 2 spring 64. The lifting column 65 is subjected to force to compress the No. 2 spring 64, so that the lifting column 65 can move downward in the cavity in the guide cylinder 63, and the end of the lifting column 65 away from the No. 2 spring 64 is fixedly connected to the bottom of the piston disk 61.

[0042] When the water in the water storage space 5 above the piston disc 61 is not frozen, the piston disc 61 is in a high position under the action of the No. 2 spring 64 and the lifting column 65. When the temperature drops, the volume of the water continues to expand during the process of freezing. The pressure in the water storage space 5 above the piston disc 61 continues to rise and presses the piston disc 61. The piston disc 61 compresses the No. 2 spring 64 through the lifting column 65. The lifting column 65 follows the piston disc 61 and moves downward to balance the pressure in the water storage space 5 above the piston disc 61 until all the water in the water storage space 5 above the piston disc 61 is frozen and the expansion stops, and the pressure no longer rises. In this way, the volume of the water in the filter housing due to freezing is offset by the increased volume of the No. 2 spring 64 compressed by the piston disc 61, thereby avoiding the filter element 2 and the filter housing from rupturing.

[0043] It is understandable that, in this embodiment, the height of the guide tube 63 does not exceed half of the maximum vertical distance between the bottom of the piston disc 61 and the bottom of the filter housing 3. The purpose of this arrangement is to ensure that the piston disc 61 has enough downward space to offset the volume expansion of water when it freezes.

[0044] The above detailed description of the preferred embodiments of the utility model should not be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. An antifreeze filter, comprising a filter seat (1) having a water inlet (11) and a water outlet (12), a filter housing (3) integrally connected to the filter seat (1), and a filter element (2) disposed in the filter housing (3) and communicating with the interior of the filter seat (1), characterized in that: A water storage space (5) is provided between the filter element (2) and the inner wall of the filter housing (3), and an anti-freezing and cracking mechanism (6) is provided in the water storage space (5). The anti-freezing and cracking mechanism (6) comprises: A piston disc (61), the piston disc (61) being slidably fitted on the inner wall of the filter housing (3), and the piston disc (61) being located directly below the filter element (2); A telescopic member, one end of which is fixedly connected to the bottom of the piston disc (61), and the other end of which is fixedly connected to the bottom of the filter housing (3).

2. An antifreeze filter according to claim 1, characterized in that: The telescopic member is a No. 1 spring (62), the top end of the No. 1 spring (62) is fixedly connected to the bottom of the piston disc (61), and the bottom end of the No. 1 spring (62) is fixedly connected to the inner bottom of the filter housing (3).

3. The antifreeze filter according to claim 1, characterized in that: The telescopic member comprises a plurality of guide cylinders (63) uniformly distributed at the bottom of the filter housing (3), a No. 2 spring (64) is provided in a cavity within each of the guide cylinders (63), the bottom end of the No. 2 spring (64) is fixedly connected to the bottom of the cavity, the top end of the No. 2 spring (64) is fixedly connected to a lifting column (65), and the end of the lifting column (65) away from the No. 2 spring (64) is fixedly connected to the bottom of the piston disc (61).

4. An antifreeze filter according to claim 3, characterized in that: The height of the guide cylinder (63) does not exceed half of the maximum vertical distance between the bottom of the piston disc (61) and the inner bottom of the filter housing (3).

5. The antifreeze filter according to claim 1, characterized in that: The anti-freezing crack mechanism (6) further comprises a sealing ring (66), wherein the sealing ring (66) is arranged on the outer edge of the piston disc (61), and the sealing ring (66) is slidably fitted on the inner side wall of the filter housing (3).

6. The antifreeze filter according to claim 1, characterized in that: The anti-freezing crack mechanism (6) also includes a guide rod (67), the top end of the guide rod (67) is fixedly connected to the bottom center of the piston disc (61), and the bottom end of the guide rod (67) movably penetrates the bottom of the filter housing (3) and extends to the outside of the filter housing (3).

7. An antifreeze filter according to claim 6, characterized in that: The antifreeze filter also includes a flushing valve (4), a flushing channel (671) is provided inside the guide rod (67), the top port of the flushing channel (671) is connected to the top of the piston disc (61), and the bottom port of the flushing channel (671) is connected to the water inlet (11) of the flushing valve (4).

8. An antifreeze filter according to any one of claims 1 to 7, characterized in that: The piston disc (61) is a hemispherical body, and the spherical surface is arranged downward.

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