Anti-freezing structure of filter

Abstract

The utility model relates to the technical field of filters, and discloses an anti-freezing structure of a filter, which comprises a mounting seat, a shell and a filter element. A water inlet and a water outlet are formed in the mounting seat; the shell is fixedly connected to the mounting base, and a water containing cavity communicated with the water inlet is formed in the shell; the filter element is arranged in the shell and fixedly connected to the mounting seat, and a water outlet hole communicated with the water outlet is formed in the filter element; an anti-freezing cavity is further arranged in the shell, an air bag made of flexible materials is arranged in the anti-freezing cavity, and the air pressure in the air bag is consistent with the water pressure in the shell. The air bag is arranged in the outer shell to form the anti-freezing cavity, and the characteristic that gas can be compressed is used for sharing and slowly releasing pressure rise caused by freezing expansion of water in the filter in winter, so that the filter is effectively prevented from being damaged due to freezing expansion of the water in winter.

Description

Technical Field

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

[0002] A filter is a tool or mechanism used to select or exclude specific elements from a set of data. Filters in water treatment are used to remove impurities and contaminants such as sand, dirt, bacteria, viruses and other contaminants from water to ensure that the water quality meets the standards for safe drinking or specific purposes. Common water treatment filters include activated carbon filters, reverse osmosis filters or ultraviolet filters.

[0003] An existing filter structure is as follows Figure 1 As shown, it includes a filter seat and a filter housing connected to the filter seat, the filter seat is provided with a water inlet and a water outlet connected to the inner space of the filter housing, and a filter element is provided in the filter housing. When in use, water flows into the filter housing through the water inlet, then passes through the filter element, and flows out through the water outlet after being purified by the filter element.

[0004] In winter, when the ambient temperature is below zero degrees, the water in the filter housing will freeze into ice. After the water inlet and outlet freeze, a closed environment will be formed in the filter housing. When water freezes, its volume expands, which makes the filter housing easily ruptured or damaged, causing the filter to be damaged and leak. Utility Model Content

[0005] The technical problem solved by the utility model is how to prevent the water in the filter housing from expanding due to freezing and causing damage to the filter.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A filter antifreeze structure, comprising:

[0008] A mounting seat, wherein the mounting seat is provided with a water inlet and a water outlet;

[0009] A shell, the shell is fixedly connected to the mounting seat, and a water containing cavity connected to the water inlet is provided in the shell;

[0010] A filter element, the filter element is arranged in the housing and fixedly connected to the mounting seat, and the filter element is provided with a water outlet hole connected to the water outlet;

[0011] Wherein, an antifreeze chamber is also arranged in the shell, and an air bag made of a flexible material is arranged in the antifreeze chamber, and the air pressure in the air bag is consistent with the water pressure in the shell.

[0012] Specifically, the antifreeze chamber is located at the lower end of the interior of the shell.

[0013] Specifically, a baffle for separating the water containing chamber and the antifreeze chamber is arranged in the shell, and a communication hole is opened on the baffle.

[0014] Specifically, a fixing sleeve is arranged in the outer shell, the outer wall of the fixing sleeve is in contact with the inner wall of the outer shell, and one end of the fixing sleeve abuts against the baffle.

[0015] Specifically, a mounting hole is provided on the shell, and a fixing rod is provided at a position of the airbag corresponding to the mounting hole, and the fixing rod is locked in the mounting hole by a nut.

[0016] Specifically, an inflation nozzle structure capable of communicating with the inner space of the airbag is arranged in the fixing rod.

[0017] Specifically, a protective sleeve is arranged on the outer side of the mounting hole of the housing.

[0018] Specifically, a mounting socket is provided on the mounting seat, and the housing is threadedly connected in the mounting socket.

[0019] Specifically, a sealing ring is provided at the position where the shell is connected to the mounting seat.

[0020] Beneficial effects of the utility model:

[0021] The present application provides an air bag in the outer shell to form an antifreeze chamber, which utilizes the compressible property of gas to distribute and slowly release the pressure increase caused by the freezing and expansion of water in the filter in winter, thereby effectively avoiding damage to the filter caused by the freezing and expansion of water in winter.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 It is a structural schematic diagram of an existing filter;

[0025] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0026] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model in a general state;

[0027] Figure 4 This utility model Figure 3 A schematic diagram of the structure with a partial enlargement at the center;

[0028] Figure 5 This utility model Figure 3 A schematic diagram of the structure with a partial enlargement at B in the middle;

[0029] Figure 6 It is a schematic cross-sectional structure diagram of the utility model airbag in a contracted state.

[0030] The reference numerals in the figure are:

[0031] 1. Mounting seat; 2. Housing; 3. Filter element; 4. Airbag; 5. Baffle; 6. Fixing sleeve; 7. Fixing rod; 8. Nut; 9. Inflating nozzle structure; 10. Protective sleeve; 11. Sealing ring. DETAILED DESCRIPTION

[0032] 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.

[0033] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] See also Figure 2-6The utility model is a filter antifreeze structure, comprising a mounting seat 1, a housing 2 and a filter element 3. The mounting seat 1 is provided with a water inlet and a water outlet; the housing 2 is fixedly connected to the mounting seat 1, and a water containing cavity connected to the water inlet is provided in the housing 2; the filter element 3 is provided in the housing 2 and fixedly connected to the mounting seat 1, and a water outlet hole connected to the water outlet is provided in the filter element 3. When in use, water flows into the filter housing 2 through the water inlet, then passes through the filter element 3, and flows out through the water outlet after being purified by the filter element 3.

[0036] See also Figure 2-6 In one embodiment of the utility model, a mounting socket is provided on the mounting seat 1, and the shell 2 is threadedly connected in the mounting socket. An annular groove is provided in the mounting socket at a position corresponding to the side wall of the end of the shell 2. After the shell 2 is threadedly screwed into the mounting socket, the end of the shell 2 is located in the annular groove. A sealing ring 11 is provided at the position where the shell 2 is connected to the mounting seat 1. Specifically, sealing grooves are respectively provided at the end and the outer wall of the shell, and the sealing groove at the end can be semicircular. When it can be connected to the mounting seat 1, two sealing rings 11 form two sealing guarantees, and the sealing rings 11 at the end will be squeezed when tightened, which can improve the sealing effect and play a self-locking role in the connection between the shell 2 and the mounting seat 1.

[0037] See also Figure 2-6 In one embodiment of the utility model, an antifreeze chamber is further provided in the shell 2, and an airbag 4 made of a flexible material is provided in the antifreeze chamber, which can be made of rubber material or other flexible materials that can expand and contract. The air pressure in the airbag 4 is consistent with the water pressure in the shell 2. The air pressure in the airbag 4 can be greater than or equal to the water pressure in the shell 2 in the use state, so that the airbag 4 is in an expanded state under normal conditions. The airbag 4 can be filled with compressed air or other gases to maintain a certain pressure, so that a certain volume can be maintained in the shell 2. Preferably, the antifreeze chamber is located at the lower end of the shell 2. A baffle 5 is provided in the shell 2 for separating the water containing chamber and the antifreeze chamber, and a connecting hole is opened on the baffle 5. The baffle 5 is provided to limit the upper limit space of the expansion of the airbag 4, thereby ensuring the use of the water containing chamber.

[0038] See also Figure 2-6In one embodiment of the utility model, a fixing sleeve 6 is provided in the shell 2, the outer wall of the fixing sleeve 6 is fitted to the inner wall of the shell 2, and one end of the fixing sleeve 6 abuts against the baffle 5. The fixing sleeve 6 can be fixedly connected to the baffle 5, or the baffle 5 can be provided with a movable clamping structure, and the abutment of the fixing sleeve 6 makes it more stable. At the same time, the fixing sleeve 6 is provided in the shell 2 to effectively improve the pressure resistance of the shell 2, and has a higher pressure upper limit when the pressure in the shell 2 expands, and is more difficult to be damaged. An outer protrusion can be provided at the upper end of the fixing sleeve 6, and a limiting area corresponding to the outer protrusion is provided on the inner wall of the shell 2, which can limit the downward limit position of the sleeve and the baffle 5, and can play a certain squeezing effect on the filter element 3 in the upward direction under the pressure of the expansion of the airbag 4, so as to ensure that the filter element 3 is firmly connected and does not disengage, thereby ensuring the water purification effect.

[0039] See also Figure 2-6 In one embodiment of the utility model, a mounting hole is provided on the shell 2, and a fixing rod 7 is provided at the position of the airbag 4 corresponding to the mounting hole. The fixing rod 7 is locked in the mounting hole by a nut 8, and a sealing ring 11 can be provided at the position where the nut 8 is connected to improve the sealing performance. The fixing rod 7 can be connected to the airbag 4 in an integral manner, or it can be a fixed split connection. The part located inside the airbag 4 can be set as a sheet structure with a larger size, and the airbag 4 abuts against the sheet structure when the airbag 4 is expanded, so as to ensure the airtightness of the connection position. An inflation nozzle structure 9 that can communicate with the internal space of the airbag 4 is provided in the fixing rod 7. The inflation nozzle structure 9 can be used to inflate or deflate the airbag 4, so as to adjust the pressure inside the airbag 4. A protective sleeve 10 is provided on the outer side of the position of the mounting hole on the shell 2. It can play a protective role for the airbag 4, the inflation nozzle structure 9, etc.

[0040] The working principle of this utility model:

[0041] When in use, water flows through the water inlet into the space outside the filter element 3 in the filter housing 2, passes through the filter element 3 from the outside to the inside, and flows out from the water outlet after being filtered by the filter element 3. A rubber airbag 4 is designed at the lower end of the filter, and a baffle 5 limits the upper limit of the expansion space of the rubber airbag 4 to prevent the rubber airbag 4 from expanding too much. The fixing sleeve 6 is used to fix the position of the baffle 5. The rubber airbag 4 is fixed by the rubber airbag 4 fixing rod 7 and the rubber airbag 4 fixing nut 8. The inflation nozzle structure 9 is fixedly connected to the fixing rod 7 of the rubber airbag 4. The air pressure higher than the use water pressure is filled into the airbag 4 through the inflation nozzle assembly. Under normal use, the rubber airbag 4 is in the maximum volume state (such as Figure 3 ), and this volume is much larger than the volume of the expanded part of the water in the filter after freezing.

[0042] When the ambient temperature is below 0° in winter, the temperature of the filter housing 2 and the water inside will also decrease, and a gradual freezing process will occur from the outside to the inside and from the top to the bottom. The ice will first block the inlet and outlet pipes. At this time, a closed space is formed inside the filter. As the water inside the filter gradually freezes, the volume also increases. Since the inlet and outlet are blocked by ice, the internal pressure gradually increases. When the pressure is greater than the air pressure in the rubber airbag 4, the rubber airbag 4 is compressed and the volume becomes smaller (such as Figure 6 ) to share the rising pressure caused by water freezing, until all the water inside the filter freezes into ice. When the rubber airbag 4 is compressed to the minimum state, there is still enough space in the rubber airbag 4 to maintain the compressed air pressure, so that the internal pressure of the filter is within the safe pressure range that the shell 2 can withstand, protecting the filter shell 2 from damage. Further, the airbag 4 can be set as a double-layer structure, the two layers of the structure are hollowed out and supported by a supporting structure (such as a honeycomb structure), and the strength of the airbag 4 is lower than the strength of the shell 2, and the pressure threshold for the damage of the airbag 4 is lower than the pressure threshold for the damage of the shell 2. When ice occurs and causes the pressure to rise too much, the airbag 4 will break before the shell 2 breaks, thereby releasing a certain amount of space for water storage, avoiding the continuous increase in pressure and causing the shell 2 to break, and the cost of replacing the damaged airbag 4 is much less than the cost of replacing the damaged shell 2, and the shell 2 still has sufficient sealing and will not leak.

[0043] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot 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 claims of the utility model.

Claims

1. A filter antifreeze structure, characterized in that: include: A mounting seat (1), wherein the mounting seat (1) is provided with a water inlet and a water outlet; A shell (2), the shell (2) being fixedly connected to the mounting seat (1), and the shell (2) being provided with a water containing cavity in communication with the water inlet; A filter element (3), the filter element (3) being arranged in the housing (2) and fixedly connected to the mounting seat (1), and the filter element (3) being provided with a water outlet hole communicating with the water outlet; The outer shell (2) is also provided with an antifreeze chamber, and an air bag (4) made of a flexible material is provided in the antifreeze chamber, and the air pressure in the air bag (4) is consistent with the water pressure in the outer shell (2).

2. A filter antifreeze structure according to claim 1, characterized in that: The antifreeze chamber is located at the lower end of the interior of the shell (2).

3. A filter antifreeze structure according to claim 2, characterized in that: A baffle (5) for separating the water containing chamber and the antifreeze chamber is arranged in the outer shell (2), and a communication hole is provided on the baffle (5).

4. A filter antifreeze structure according to claim 3, characterized in that: A fixing sleeve (6) is arranged inside the outer shell (2), the outer wall of the fixing sleeve (6) is in contact with the inner wall of the outer shell (2), and one end of the fixing sleeve (6) abuts against the baffle (5).

5. A filter antifreeze structure according to claim 4, characterized in that: The housing (2) is provided with a mounting hole, and the airbag (4) is provided with a fixing rod (7) at a position corresponding to the mounting hole, and the fixing rod (7) is locked in the mounting hole by a nut (8).

6. A filter antifreeze structure according to claim 5, characterized in that: An inflation nozzle structure (9) capable of communicating with the internal space of the airbag (4) is arranged inside the fixing rod (7).

7. A filter antifreeze structure according to claim 6, characterized in that: A protective sleeve (10) is arranged on the outer side of the housing (2) at the location of the mounting hole.

8. A filter antifreeze structure according to claim 7, characterized in that: The mounting seat (1) is provided with a mounting socket, and the housing (2) is threadedly connected in the mounting socket.

9. A filter antifreeze structure according to claim 8, characterized in that: A sealing ring (11) is provided at the position where the outer shell (2) is connected to the mounting seat (1).

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