阅读说明：本技术 一种具有低温保护功能的过滤器 (Filter with low temperature protection function ) 是由 林泽峰 陆海涛 林益龙 陈希敏 于 2020-11-17 设计创作，主要内容包括：本发明公开了一种具有低温保护功能的过滤器,包括壳体,所述壳体内设置有滤芯组件,位于滤芯组件下方的壳体内还设置有一活塞,所述活塞的周侧壁与壳体内周壁密封配合,位于活塞与壳体底部间设置有复位弹簧,该壳体可以有效的防止在低温时,壳体内残留水结冰造成壳体爆裂,有效的保护过滤器在低温时的稳定性。(The invention discloses a filter with a low-temperature protection function, which comprises a shell, wherein a filter element assembly is arranged in the shell, a piston is also arranged in the shell below the filter element assembly, the peripheral side wall of the piston is in sealing fit with the peripheral wall in the shell, and a return spring is arranged between the piston and the bottom of the shell.)

1. The utility model provides a filter with low temperature protection function, includes the casing, its characterized in that, be provided with filter element group spare in the casing, still be provided with a piston in the casing that is located filter element group spare below, the sealed cooperation of perisporium in the week lateral wall of piston and the casing, be located and be provided with reset spring between piston and casing bottom.

2. The filter with low temperature protection function as claimed in claim 1, wherein the piston is provided at a lower end thereof with a protruding ring, and the bottom of the housing is provided with an annular groove into which the protruding ring can be inserted.

3. The filter with low temperature protection function as claimed in claim 2, wherein the diameter of the annular groove is smaller than the outer diameter of the convex ring, and the side wall of the convex ring is provided with slots.

4. The filter with low temperature protection function as claimed in claim 3, wherein the side wall of the convex ring is provided with at least two slots, and the slots are annularly distributed on the side wall of the convex ring.

5. The filter with low temperature protection function as claimed in claim 4, wherein the slots are obliquely arranged on the side wall of the convex ring.

6. The filter with the function of low temperature protection according to any one of claims 2-5, wherein the bottom of the housing is provided with an annular protrusion, the annular groove is arranged in the annular protrusion, and a first guiding inclined plane capable of being matched with the convex ring is arranged above the annular protrusion on the peripheral side of the annular groove.

7. The filter with the function of low temperature protection according to claim 6, wherein the lower periphery of the convex ring is provided with a second guide slope which can be matched with the first guide slope.

8. The filter with low temperature protection function of claim 7, wherein a reduced section is provided at the lowest part of the convex ring, and the outer diameter of the reduced section is not larger than the diameter of the annular groove.

9. The filter with the function of low temperature protection according to any one of claims 1 to 5 and 7 to 8, wherein a sealing ring is arranged between the outer peripheral wall of the piston and the inner peripheral wall of the housing, and two ends of the spring are respectively sleeved on the outer peripheries of the convex ring and the annular convex part.

10. The filter with low temperature protection function as claimed in claim 9, wherein the annular protrusion is peripherally sleeved with a gasket, and the gasket is located between the lower end of the spring and the bottom of the housing.

Technical Field

The invention relates to a filter with a low-temperature protection function.

Background

At present, when filters on the market are used, water is stored in the filters, and in winter, particularly in regions with cold weather, due to the fact that water is formed into ice and expands in volume, a water tap is always frozen or damaged, certain potential safety hazards are brought to users, and at present, various anti-freezing devices are put forward to prevent the filters from being broken due to freezing and expanding in the filters. For example: using a blow-off valve, internally sprung, etc. However, these devices are either expensive, short in service life, complex in structure, high in material consumption, and not ideal in anti-burst effect.

Disclosure of Invention

In order to solve the above-mentioned problems, an object of the present invention is to provide a filter having a low temperature protection function.

The invention is realized by the following technical scheme:

the utility model provides a filter with low temperature protection function, includes the casing, be provided with filter element group spare in the casing, still be provided with a piston in the casing that is located filter element group spare below, the sealed cooperation of perisporium and casing perisporium of the week lateral wall of piston is located and is provided with reset spring between piston and casing bottom.

In the embodiment of the invention, the lower end of the piston is provided with the convex ring, the bottom of the shell is provided with the annular groove, and the convex ring can be inserted into the annular groove.

In the embodiment of the invention, the diameter of the annular groove is smaller than the outer diameter of the convex ring, and the side wall of the convex ring is provided with the open groove.

In the embodiment of the invention, the side wall of the convex ring is provided with at least two slots, and the slots are annularly distributed on the side wall of the convex ring.

In the embodiment of the invention, the slot is obliquely arranged on the side wall of the convex ring.

In the embodiment of the invention, the bottom of the shell is provided with an annular bulge, the annular groove is arranged in the annular bulge, and a first guide inclined plane which can be matched with the convex ring is arranged above the annular bulge on the peripheral side of the annular groove.

In the embodiment of the invention, the periphery of the lower part of the convex ring is provided with a second guide inclined plane which can be matched with the first guide inclined plane.

In the embodiment of the invention, a reducing section is arranged at the lowest part of the convex ring, and the outer diameter of the reducing section is not more than the diameter of the annular groove.

In the embodiment of the invention, a sealing ring is arranged between the outer peripheral wall of the piston and the inner peripheral wall of the shell, and two ends of the spring are respectively sleeved on the peripheries of the convex ring and the annular convex part.

In the embodiment of the invention, a gasket is sleeved on the periphery of the annular convex part and is positioned between the lower end of the spring and the bottom of the shell.

The filter with the low-temperature protection function has the following beneficial effects: 1. the piston can move downwards when water in the shell is frozen, so that the volume of the water passing cavity is increased, the shell cannot burst due to freezing of water in the shell, the frost crack prevention stability is high, and frost crack prevention under high pressure can be realized; meanwhile, the structure is simple and the size is small.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is an exploded view of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Fig. 3 is an enlarged schematic view at a in fig. 2.

Fig. 4 is a schematic view of a piston according to the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.

Referring to the attached drawings of the specification, the filter with the low-temperature protection function comprises a shell 10, wherein a filter element assembly 20 is arranged in the shell, a piston 30 is further arranged in the shell below the filter element assembly, the peripheral side wall of the piston is in sealing fit with the peripheral wall in the shell, and a return spring 40 is arranged between the piston and the bottom of the shell, and the filter specifically comprises: the piston divides the shell into two chambers which are distributed up and down, the upper chamber is a water filtering area for filtering water, the filter element assembly is prevented from being in the water filtering area, the lower chamber is a buffer area, when the temperature drops to cause the water in the water filtering area to freeze, the pressure of the water filtering area is increased, the piston is pressed back at the moment, the volume of the water filtering area is increased, the volume of the buffer area is reduced, and the shell is prevented from bursting after the water in the water filtering area is frozen; when the air temperature rises again to make the ice in the original water filtering area into water, the piston moves upwards under the action of the return spring, the volume of the water filtering area is smaller, the submitting of the buffer area becomes larger, and the volume distribution under the normal water passing condition is recovered.

In the invention, the lower end of the piston is provided with a convex ring 31, the bottom of the shell is provided with an annular groove 11, and the convex ring can be inserted into the annular groove. The diameter D1 of annular groove is less than the external diameter D2 of bulge loop, be provided with fluting 32 on the lateral wall of bulge loop, when normally leading to water, the bulge loop can be in the annular groove top, and when the water in the water filtering area freezes, the piston moves down makes the bulge loop can be located the annular groove. The side wall of the convex ring is provided with at least two slots which are annularly distributed on the side wall of the convex ring. The slots are obliquely arranged on the side wall of the convex ring.

Preferably, the following steps: the casing bottom is provided with an annular bellying 12, the annular groove sets up in the annular bellying, the annular bellying top that is located annular groove week side is provided with can with the first direction inclined plane 13 of bulge loop matched with, when the bulge loop will insert the annular groove in, at the lower extreme and the cooperation of first direction inclined plane of bulge loop, then compressed back, under the effect of draw-in groove, the bulge loop can contract in, make under the normal condition outside diameter D1 of annular groove be less than the outside diameter D2 that the outside diameter D1 of bulge loop becomes the annular groove and is not less than outside diameter D2 of bulge loop, the bulge loop can insert in the annular groove like this, realize the volume in increase water filtering area, reduce the volume of buffers.

The invention more specifically comprises the following steps: and a second guide inclined plane 33 which can be matched with the first guide inclined plane is arranged on the periphery of the lower part of the convex ring. And a necking section 34 is arranged at the lowest part of the convex ring, the outer diameter D3 of the necking section is not more than the diameter of the annular groove, when the convex ring is inserted into the annular groove, the necking section firstly extends into the annular groove, and then the convex ring is gradually shrunk and inserted into the annular groove under the matching of the first guide inclined plane and the second guide inclined plane.

The invention preferably: a sealing ring 50 is arranged between the peripheral wall of the piston and the inner peripheral wall of the shell, and two ends of the spring are respectively sleeved on the peripheries of the convex ring and the annular convex part. The periphery of the annular convex part is sleeved with a gasket 60, and the gasket is positioned between the lower end of the spring and the bottom of a shell.

In the invention, the bottom of the filter element component is provided with a movable piston, a convex ring is arranged below the piston, and the side wall of the convex ring adopts a slope buckle slotting mode, so that the outer diameter of the convex ring can be reduced under the condition of external force; after the water is melted, the spring is reset, and the piston is restored to the original position.

More specifically: the inside at the casing is provided with a step face 14, this step face and filter element group spare below cooperation hookup, can make fixed the placing in the casing of filter element group spare like this, and simultaneously, be provided with inhalant canal 15 between the joint 21 of filter element group spare upper end and the casing inner peripheral wall, in one use, the external joint (not drawn in the figure) couples with the joint cooperation of filter element group spare upper end, make water flow in from the water supply connector of casing, the periphery through filter element group spare flows inwards, filter through the filter media, can be the annular member that material such as filter pulp made, then from the joint of filter element group spare, the external joint flows.

While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.