Pre-filter

Abstract

The utility model discloses a prefilter which comprises a valve head and a filter bottle, the valve head is provided with a drain outlet, a water storage cavity is formed in the filter bottle, the upper end of the valve head is fixedly connected to the lower end of the filter bottle according to the actual use state, and an anti-freezing assembly is arranged in the water storage cavity. The anti-freezing assembly comprises a piston and an elastic piece used for resetting the piston, the piston is installed in the filter bottle and divides the water storage cavity into a water storage area on the lower side and a water separation area on the upper side, the elastic piece is installed in the water separation area, and one end of the elastic piece is supported on the piston. The anti-freezing function is added on the basis of the pre-filter, when the pre-filter is frozen, the piston of the anti-freezing assembly can move towards the water separation area and enables the volume of the water storage area to be increased, then the filter bottle is protected to the maximum extent, and the risk that the filter bottle bursts is reduced.

Description

Technical Field

[0001] The utility model relates to the field of water purification equipment, in particular to an inverted pre-filter with an antifreeze function. Background Art

[0002] The existing pre-filter includes a valve head, a filter bottle and a filter assembly. The left and right ends of the valve head are respectively provided with a water inlet and an outlet. The valve head is detachably mounted above the filter bottle, and the filter assembly is mounted inside the filter bottle. The pre-filter can be installed behind the water meter on the water inlet pipe to intercept the precipitated impurities generated in the pipe network, especially to intercept large particles such as silt, rust, etc. in the tap water.

[0003] However, when the existing pre-filter is used in the winter when the temperature is low, it usually freezes, causing the filter bottle (transparent plastic) to crack and cause water leakage, which greatly reduces the user experience.

[0004] In summary, in view of the above-mentioned defects of the pre-filter in the prior art, it is necessary to propose a pre-filter with an antifreeze function. Utility Model Content

[0005] The utility model discloses a pre-filter, and aims to provide a pre-filter with an anti-freezing function, wherein the pre-filter can effectively reduce the risk of freezing and cracking of a filter bottle.

[0006] In order to achieve the purpose, the technical solution provided by the utility model is as follows:

[0007] A pre-filter comprises a valve head and a filter bottle, wherein the valve head is provided with a sewage outlet, and a water storage chamber is formed inside the filter bottle. Depending on the actual use status, the upper end of the valve head is fixedly connected to the lower end of the filter bottle, and an antifreeze component is provided in the water storage chamber. The antifreeze component comprises a piston and an elastic member for resetting the piston. The piston is installed in the filter bottle and divides the water storage chamber into a water storage area on the lower side and a water isolation area on the upper side. The elastic member is installed in the water isolation area, and one end of the elastic member is supported on the piston.

[0008] Furthermore, the outer side of the piston is sealed to the inner wall of the water storage chamber.

[0009] Furthermore, the other end of the elastic member is supported on the top wall of the filter bottle.

[0010] Furthermore, an exhaust port is provided on the top wall of the filter bottle, and the exhaust port can avoid the influence of air in the water-isolating area, so that the elastic member is compressed to the maximum extent.

[0011] Furthermore, the elastic member is a plastic elastomer.

[0012] Furthermore, a central hole is formed on the plastic elastic body, and the central hole is communicated with the exhaust port.

[0013] Furthermore, the plastic elastic body is provided with an inclined hole, which is communicated with the exhaust port.

[0014] Furthermore, the elastic member is a spring.

[0015] Furthermore, the antifreeze component is located at the upper part of the water storage chamber.

[0016] Furthermore, the pre-filter also includes an openable / closable sewage discharge component, and the sewage discharge component is installed at the sewage discharge port of the valve head.

[0017] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0018] The utility model adds an antifreeze function on the basis of the pre-filter. When ice forms, the piston of the antifreeze component will move toward the water isolation area and increase the volume of the water storage area, thereby protecting the filter bottle to the greatest extent and reducing the risk of the filter bottle bursting.

[0019] The pre-filter of the utility model adopts an inverted structure, with the filter bottle on the top and the valve head on the bottom, and the sewage outlet is arranged on the valve head. When the antifreeze component of this structure is installed in the filter bottle, there is no need to consider the factor of the sewage outlet. Therefore, the layout is more reasonable and the antifreeze performance of the antifreeze component can be maximized in a limited space. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the first embodiment.

[0021] Figure 2 It is a schematic cross-sectional structure diagram of the first embodiment.

[0022] Figure 3 It is a schematic cross-sectional structure diagram of the second embodiment.

[0023] Figure 4 It is a schematic cross-sectional structure diagram of embodiment 3.

[0024] Figure 5 It is a schematic cross-sectional structure diagram of the fourth embodiment. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments. Example

[0026] Reference Figure 1 and Figure 2A pre-filter includes a valve head 1 and a filter bottle 2. The lower end of the valve head 1 is provided with a sewage outlet 3, the upper end of the valve head 1 is provided with an internal thread, and the left and right ends of the valve head 1 respectively form a water outlet 12 and a water inlet 11. The lower end of the filter bottle 2 is open, and its outer wall is provided with an external thread. As shown in the figure, the filter bottle 2 is threadedly connected to the valve head 1.

[0027] A water storage chamber 4 is formed inside the filter bottle 2. The upper end of the valve head 1 is fixedly connected to the lower end of the filter bottle 2, depending on the actual use status. An antifreeze component 5 is provided on the upper part of the water storage chamber 4. The antifreeze component 5 includes a piston 6 and a plastic elastomer 7 for resetting the piston 6. The piston 6 is annular and is sealed and installed on the upper part of the filter bottle 2 through a sealing ring 60 on the side, and the water storage chamber 4 is divided into a water storage area 41 on the lower side and a water isolation area 42 on the upper side. The plastic elastomer 7 is installed in the water isolation area 42, one end of which is supported by the piston 6, and the other end is supported by the top wall of the filter bottle 2.

[0028] Furthermore, the top wall of the filter bottle 2 is provided with an exhaust port 20. The exhaust port 20 can avoid the influence of the air in the water-isolating area 42, so that the plastic elastic body 7 is compressed to the maximum extent. Figure 2 It can be seen that a central hole 70 is formed on the plastic elastic body 7 (usually made of TPU material), and the central hole 70 is connected to the exhaust port 20 .

[0029] In addition, the pre-filter further comprises an openable / closable sewage discharge component 8 , and the sewage discharge component 8 is installed at the sewage discharge port 3 of the valve head 1 . Example

[0030] Reference Figure 3 The structure of this embodiment is basically the same as that of the first embodiment, and the main difference is that a protrusion 61 is formed in the middle of the piston 6 from the water isolation area 42 to the water storage area 41. Under the premise of not affecting the operation of the antifreeze assembly, the water storage capacity of the water storage area 41 can be appropriately reduced, thereby further ensuring the safety of the filter bottle 2. Example

[0031] Reference Figure 4 The structure of this embodiment is basically the same as that of the above-mentioned embodiment 1, and the main difference is that the elastic member in this embodiment is a return spring 9. Example

[0032] Reference Figure 5 The structure of this embodiment is basically the same as that of the first embodiment, and the main difference is that an inclined hole 71 is provided on the plastic elastic body 7 of this embodiment, and both ends of the inclined hole 71 respectively penetrate the plastic elastic body 7 and are connected to the exhaust port 20.

[0033] The specific embodiments described herein are merely examples of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but this will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A pre-filter, comprising a valve head and a filter bottle, wherein the valve head is provided with a sewage outlet, and a water storage cavity is formed inside the filter bottle. The upper end of the valve head is fixedly connected to the lower end of the filter bottle according to the actual use state, and is characterized in that: An antifreeze component is provided in the water storage chamber, and the antifreeze component includes a piston and an elastic member for resetting the piston. The piston is installed in the filter bottle and divides the water storage chamber into a water storage area on the lower side and a water isolation area on the upper side. The elastic member is installed in the water isolation area, and one end of it is supported on the piston.

2. The pre-filter according to claim 1, characterized in that: The outer side of the piston is sealed to the inner wall of the water storage chamber.

3. The pre-filter according to claim 1, characterized in that: The other end of the elastic member is supported on the top wall of the filter bottle.

4. The pre-filter according to claim 1, characterized in that: An exhaust port is arranged on the top wall of the filter bottle.

5. The pre-filter according to claim 4, characterized in that: The elastic member is a plastic elastomer.

6. The pre-filter according to claim 5, characterized in that: The plastic elastic body is provided with a central hole which is communicated with the exhaust port.

7. The pre-filter according to claim 5, characterized in that: The plastic elastic body is provided with an oblique hole, which is communicated with the exhaust port.

8. The pre-filter according to claim 1, characterized in that: The elastic member is a spring.

9. The pre-filter according to claim 1, characterized in that: The antifreeze component is located at the upper part of the water storage chamber.

10. The pre-filter according to claim 1, characterized in that: The pre-filter also includes an openable / closable sewage discharge component, which is installed at the sewage discharge port of the valve head.

Images