Valve head of pre-filter, pre-filter and water consumption system

Abstract

The utility model discloses a valve head of a pre-filter, the pre-filter and a water consuming system, and relates to the technical field of filtering equipment, the valve head of the pre-filter comprises a plastic lining part and a metal shell part, the plastic lining part is provided with a water inlet and a water outlet; the plastic lining part is sleeved with the metal shell part, and the metal shell part is used for being connected with a filter bottle of the pre-filter; wherein the metal shell part is provided with a connecting structure, at least one of the metal shell part and the filter bottle is provided with a through hole, and the connecting structure penetrates through the through hole through a fastener to be connected to the filter bottle. According to the technical scheme provided by the utility model, the valve head is connected with the filter bottle through the fastener, so that the assembly difficulty of the prefilter is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering equipment, in particular to a valve head of a pre-filter, a pre-filter and a water use system. Background Art

[0002] The valve head and filter bottle of the existing pre-filter are connected by threads. This connection method requires the use of specific tooling fixtures for production and manufacturing. During the assembly process, the valve head and filter bottle must be accurately aligned, and the rotational torque must be strictly controlled to ensure that the valve head and filter bottle are connected in place. This increases the complexity of production and the difficulty of assembly operations. Utility Model Content

[0003] The main purpose of the utility model is to provide a valve head of a pre-filter, a pre-filter and a water system, aiming to connect the valve head to the filter bottle through a fastener to reduce the difficulty of assembling the pre-filter.

[0004] To achieve the above-mentioned purpose, the valve head of the pre-filter proposed by the present invention includes:

[0005] A plastic lining portion, wherein the plastic lining portion is provided with a water inlet and a water outlet; and

[0006] a metal outer shell portion, the metal outer shell portion being sleeved on the plastic lining portion, and the metal outer shell portion being used to connect to the filter bottle of the pre-filter;

[0007] The metal shell portion is provided with a connection structure, and at least one of the metal shell portion and the filter bottle is provided with a through hole, and the connection structure is connected to the filter bottle by a fastener passing through the through hole.

[0008] In one embodiment, the connection structure is configured as a flange provided along the periphery of the metal shell portion, and the flange is provided with the through hole for the fastener to pass through.

[0009] In one embodiment, the outer periphery of the flange is polygonal or quasi-polygonal, and the through holes are provided at corners of the flange.

[0010] In one embodiment, the corner of the flange is configured as a rounded corner, and the center of the through hole and the center of the corner of the flange are located at the same position.

[0011] In one embodiment, the distance between two opposite sides of the flange is L, the inner diameter of the valve head is D, and L and D satisfy: 5.4 mm ≤ LD ≤ 9.4 mm.

[0012] In one embodiment, the radius of the through hole is r, and the distance from the center of the through hole to the side of the flange is d, and r and d satisfy: 2.1 mm≤dr≤5.7 mm.

[0013] In one embodiment, the thickness of the flange is h, and h satisfies: 3mm≤h≤7mm.

[0014] In one embodiment, the metal outer shell portion and the plastic lining portion are integrally formed.

[0015] In one embodiment, an engaging ring protrusion is provided in the metal shell portion on the side facing the filter bottle, and an engaging ring groove is provided in the plastic lining portion corresponding to the engaging ring protrusion, and the engaging ring groove and the engaging ring protrusion are engaged with each other.

[0016] In one embodiment, the plastic lining portion is provided with limiting ring protrusions on the outer peripheries of the water inlet and the water outlet, and the metal outer shell portion is provided with limiting ring grooves that are embedded in the limiting ring protrusions.

[0017] The present invention further provides a prefilter, which comprises a filter bottle and a valve head as described above for the prefilter, wherein the valve head is connected to the filter bottle.

[0018] In one embodiment, the fastener is configured as a bolt, and the filter bottle and the valve head are connected by the bolt.

[0019] In one embodiment, the fastener further comprises a nut, wherein the nut is screwed onto the bolt on a side of the filter bottle facing away from the valve head.

[0020] In one embodiment, a limiting groove is provided on the side of the filter bottle facing away from the valve head, and the limiting groove has an installation opening. The nut is installed in the limiting groove from the installation opening and is engaged with the limiting groove in the circumferential upper limit direction.

[0021] The present invention also provides a water use system, which includes the pre-filter as described above.

[0022] The valve head of the present invention comprises an outer metal shell and an inner plastic lining. Tap water first enters the plastic lining from the water inlet, then enters the filter bottle for filtration, and then flows out from the water outlet. Only the plastic lining of the valve head contacts the tap water, while the metal shell does not. This prevents ions precipitated from the metal from affecting the water quality. Furthermore, at least one of the metal shell and the filter bottle is provided with a through-hole. The metal shell is connected to the filter bottle via a fastener through the through-hole in the connection structure. The fastener is not provided in the portion of the valve head that connects the filter bottle, ensuring stable water flow between the valve head and the filter bottle. The valve head does not require post-processing; it can be stably connected via the fastener after the valve head is formed. Furthermore, alignment requirements for the valve head and the filter bottle are low. Precise torque control is not required during the connection process; the valve head and the filter bottle can simply be connected via the fastener, thereby reducing the difficulty of manufacturing and assembling the pre-filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0024] Figure 1 This is a structural diagram of an embodiment of a valve head of a pre-filter provided by the present invention;

[0025] Figure 2 for Figure 1 Cross-sectional view of the middle valve head;

[0026] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0027] Figure 4 for Figure 1 Bottom view of the middle valve head;

[0028] Figure 5 for Figure 1 Schematic diagram of the structure of the plastic lining part;

[0029] Figure 6 for Figure 1 Schematic diagram of the structure of the metal shell;

[0030] Figure 7 A schematic structural diagram of an embodiment of a pre-filter provided by the present utility model;

[0031] Figure 8 for Figure 7 Cross-sectional view of the middle pre-filter;

[0032] Figure 9 for Figure 8 A partial enlarged view of point B in the middle;

[0033] Figure 10 for Figure 7 A schematic diagram of the structure of the middle filter bottle from one perspective;

[0034] Figure 11 for Figure 7 Schematic diagram of the structure of the middle filter bottle equipped with a nut;

[0035] Figure 12 for Figure 7 Bottom view of the middle filter flask with the nut installed.

[0036] Description of Figure Numbers:

[0037] 10. Filter bottle; 11. First flange; 111. Through hole; 121. Mounting port; 122. Limiting groove;

[0038] 20. Valve head; 201. Water inlet; 202. Water outlet; 21. Flange; 22. Metal shell; 221. Limiting ring groove; 222. Embossed ring protrusion; 23. Plastic lining; 231. Limiting ring protrusion; 232. Embossed ring groove; 31. Bolt; 32. Nut.

[0039] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0041] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] In the prior art, the valve head and filter bottle of the pre-filter are typically threaded at the connection point, such as an internal thread on the inner periphery of the valve head's connection port and an external thread on the outer periphery of the filter bottle's connection head, so that the valve head and filter bottle are directly threadedly connected. In this connection structure, the production process of the valve head and filter bottle requires a fixture to fix them, and then the threads are screwed out. This not only increases the molding process but also affects the structural strength of the connection. In addition, during the connection process of the valve head and filter bottle, the internal thread of the valve head and the external thread of the filter bottle need to be aligned, and then the valve head or filter bottle is screwed together. This not only requires ensuring the coaxiality of the axis of the valve head and filter bottle, but also requires good control of the screwing torque to achieve just the right connection stability. This places high demands on the torque and screwing position, thereby increasing the complexity of the production and assembly process of the pre-filter. With regard to the valve head, the material of the valve head in the prior art is mainly copper. Copper easily precipitates copper ions when immersed in water for a long time, causing the heavy metal content of tap water to exceed the standard and affecting the water quality of tap water.

[0044] Before introducing the connection structure of the valve head and the filter bottle of the present invention, the water filtering process of the pre-filter is first introduced. During the use of the pre-filter, tap water first enters the valve head from the water inlet, and enters the water filter cavity of the filter bottle under the guidance of the water inlet section in the valve head. The tap water is filtered by the filter element assembly in the water filter cavity, and then, under the action of pressure, the filtered tap water flows out from the water outlet to the water-using equipment. After a period of use, a certain amount of impurities will be deposited in the filter element assembly and the water filter cavity. At this time, the water outlet can be closed, and the drain valve of the filter bottle can be opened to guide the tap water coming in from the water inlet to flush the valve element assembly and the filter bottle to improve the filtering capacity of the filter element assembly. Some pre-filters on the market usually have a flushing function, that is, they can be cleaned regularly to discharge the large particles that were previously intercepted, thereby increasing the service life of the pre-filter.

[0045] Pre-filters are used in water systems. For example, whole-house water purification systems typically feature a pre-filter, which filters large particles from tap water. This not only ensures water safety for residents but also extends the lifespan of appliances, prevents clogged household water pipes, and improves residents' health. A pre-filter is the first coarse filtration device in a whole-house water purification system. It is a physical filtration device that primarily intercepts large particles larger than 40 microns, ensuring back-end water safety.

[0046] The utility model provides a valve head of a pre-filter.

[0047] Please refer to Figures 1 to 3 In one embodiment of the present invention, the valve head of the pre-filter includes:

[0048] A plastic lining portion 23, wherein the plastic lining portion 23 is provided with a water inlet 201 and a water outlet 202; and

[0049] A metal shell portion 22, which is sleeved on the plastic lining portion 23, and is used to connect the filter bottle 10 of the pre-filter;

[0050] The metal shell portion 22 is provided with a connection structure. At least one of the metal shell portion 22 and the filter bottle 10 is provided with a through hole 111 . The connection structure is connected to the filter bottle 10 by fasteners passing through the through hole 111 .

[0051] The valve head 20 of the technical solution of the present invention includes an outer metal shell part 22 and an inner plastic lining part 23. Tap water first enters the plastic lining part 23 from the water inlet 201, then enters the filter bottle 10 for filtration, and then flows out from the water outlet 202. Among them, only the plastic lining part 23 of the valve head 20 is in contact with the tap water, and the metal shell part 22 is not in contact with the tap water, which can prevent the ions precipitated from the metal material from affecting the water quality of the tap water. In addition, at least one of the metal shell part 22 and the filter bottle 10 is provided with a through hole 111, and the metal shell part 22 is fastened on the connection structure. The fastener is passed through the through hole 111 and then connected to the filter bottle 10. The fastener is not set on the valve head 20 for connecting to the filter bottle 10, ensuring that the water flow can stably flow between the valve head 20 and the filter bottle 10. The valve head 20 does not need to be post-processed. After the valve head 20 is formed, it can be stably connected by fasteners. Moreover, the alignment requirements of the valve head 20 and the filter bottle 10 are low. At the same time, there is no need to accurately control the torque during the connection of the valve head 20 and the filter bottle 10. The valve head 20 and the filter bottle 10 can be simply connected by fasteners, thereby reducing the difficulty of production and assembly of the pre-filter.

[0052] It should be noted that the metal shell 22 can be made of copper alloy, stainless steel, etc., and is used for connecting the valve head 20 to external connections, such as connecting the valve head 20 to a water pipe, connecting the valve head 20 to a valve bottle, etc. The high strength of the metal shell 22 ensures the structural stability of the pre-filter and the installation reliability of the pre-filter. In addition, the fasteners can be configured as screws, bolts 31, rivets or pins, etc., so that the valve head 20 is connected to the filter bottle 10 by screwing, riveting, plug connection, etc., wherein, in the screwing method, the screw or bolt 31 can be directly screwed to the valve head 20 or filter bottle 10, or the valve head 20 and filter bottle 10 can be connected by connecting with the nut 32. In the riveting method, the rivet can be directly riveted to the valve head 20 or filter bottle 10. In the plug connection method, the pin can be directly inserted into the valve head 20 and filter bottle 10, or the pin can be connected by the cooperation of the pin shaft and the pin. In particular, when the fastener is configured as two components, such as a screw and nut 32, or a pin and a pivot pin, one of the components can be pre-fixed to the valve head 20 or the filter bottle 10, or integrally formed with the valve head 20 or the filter bottle 10, to facilitate the fastener connecting the valve head 20 and the filter bottle 10. It should be noted that a through hole 111 is provided between the filter bottle 10 and the valve head 20 for the fastener to pass through. The through holes 111 can be distributed along the circumference of the connection between the filter bottle 10 and the valve head 20, or can be arranged on the outer periphery of the filter bottle 10 or the valve head 20, spaced relative to the connection between the filter bottle 10 and the valve head 20.

[0053] In one embodiment, please refer to Figure 1 and Figure 4 The connection structure is configured as a flange 21 provided along the periphery of the metal shell portion 22. The flange 21 is provided with a through-hole 111 for fasteners to pass through. It is understood that the flange 21 is provided outwardly on the periphery of the valve head 20 where it connects to the filter bottle 10. Similarly, the periphery of the filter bottle 10 where it connects to the valve head 20 also has a first flange 11 protruding outwardly. The flange 21 and the first flange 11 are parallel and abutted against each other. Fasteners are provided on the flange 21 to connect the filter bottle 10 and the valve head 20. In this way, the first flange 11 and the flange 21 not only avoid the connection structure between the valve head 20 and the filter bottle 10, but also form a connection and positioning for the valve head 20 and the filter bottle 10, thus avoiding interference with the sealing of the connection between the valve head 20 and the filter bottle 10 and improving the convenience of connecting the valve head 20 and the filter bottle 10. Of course, in other embodiments, the peripheral wall of the connection point between the valve head 20 and the filter bottle 10 is set to be thicker, and a through hole 111 is axially opened on the peripheral wall of the connection point between the valve head 20 and the filter bottle 10, and a fastener is passed through the through hole 111 to connect the valve head 20 and the filter bottle 10.

[0054] In one embodiment, please refer to Figure 1 、 Figure 4 and Figure 6The outer periphery of the flange 21 is polygonal or quasi-polygonal, and the through-holes 111 are provided at the corners of the flange 21. It is understood that the first flange 11 on the filter bottle 10 is provided in the same manner. When the shape formed by the periphery of the flange 21 is polygonal, its periphery can be an arc or a combination of an arc and a line segment. The first flange 11 is provided with reference to the shape of the flange 21, and the two are tightly connected. In this way, the corners of the flange 21 are obviously protruded from the outside of the filter bottle 10. The through-holes 111 are provided at the corners of the flange 21 or the first flange 11, providing sufficient space for the arrangement of fasteners, avoiding weakening the structural stability of the flange 21 on the valve head 20 due to the provision of the through-holes 111. The design of the first flange 11 is consistent with the design requirements of the flange 21, thereby improving the connection stability between the filter bottle 10 and the valve head 20. In addition, the flange 21 has multiple corners, which means that there are multiple fasteners distributed around the periphery of the valve head 20. In the event that the connection of a certain fastener fails, the other fasteners can still ensure the connection stability between the valve head 20 and the filter bottle 10, thereby improving the reliability of the pre-filter.

[0055] Further, in this embodiment, please refer to Figure 4 and Figure 5 The corners of the flange 21 are rounded, and the center of the through-hole 111 is co-located with the center of the corner of the flange 21. It will be appreciated that the outer circumference of the corner of the flange 21 is provided with a circular arc, the center of which is co-located with the center of the through-hole 111. This ensures that, after the fastener is inserted through the through-hole 111, the supporting force exerted by the fastener 111 on the outer circumference of the corner of the flange 21 is uniform, thereby ensuring the uniformity and stability of the force between the flange 21 of the filter bottle 10 and the flange 21 of the valve head 10 in the circumferential direction, thereby improving the connection stability and sealing performance of the valve head 20 and the filter bottle 10. Furthermore, the rounded corners of the flange 21 also prevent damage to the corners of the flange 21, further ensuring the stability of the connection between the valve head 20 and the filter bottle 10. Of course, in other embodiments, at least one corner of the flange 21 may also be square.

[0056] In one embodiment, please refer to Figure 4The distance between the two opposite sides of the flange 21 is L, the inner diameter of the valve head 20 is D, and L and D satisfy: 5.4mm≤LD≤9.4mm. It is understood that the line connecting the two opposing sides of the flange 21 may pass through the axis of the valve head 20 connecting to the filter bottle 10 or be of equal length to the line passing through this axis. The inner diameter of the valve head 20 is the diameter of the interface where the valve head 20 connects to the filter bottle 10, presenting the flange 21 with an inner circumference and an outer circumference. Thus, LD represents: from the direction of the filter bottle 10 toward the valve head 20, that is, in a bottom view of the valve head 20, twice the minimum distance between the outer circumference and the inner circumference of the flange 21. The value of LD is limited to between 5.4 mm and 9.4 mm, i.e., greater than or equal to 5.4 mm and less than or equal to 9.4 mm. This ensures the structural strength of the flange 21 on the valve head 20 and prevents the flange 21 from protruding too much, which would weaken the structural stability of the flange 21 on the valve head 20, thereby ensuring the stability of the connection between the valve head 20 and the filter bottle 10. The structure of the first flange 11 is similarly similar to that of the flange 21. Specifically, L can be 69.8mm, 70.8mm or 71.8mm, etc., and D can be 62.4mm, 63.4mm or 64.4mm, etc.

[0057] In one embodiment, please refer to Figure 4 The radius of the through hole 111 is r, and the distance from the center of the through hole 111 to the side of the flange 21 is d, and r and d satisfy: 2.1mm≤dr≤5.7mm. It should be noted that when the through hole 111 is located at a corner of the flange 21, the distances between the through hole 111 and both sides of the corner of the flange 21 are equal, both being dr. When the through hole 111 is adjacent to the circumferential edge of the flange 21, the distance between the through hole 111 and the circumferential edge of the flange 21 is dr. Thus, dr is limited to between 2.1 mm and 5.7 mm, i.e., greater than or equal to 2.1 mm and less than or equal to 5.7 mm. This ensures the strength of the circumference of the through hole 111 and prevents cracks or damage to the through hole 111 after the fastener passes through the through hole 111, which could affect the connection stability between the valve head 20 and the filter bottle 10. Similarly, it also prevents the distance between the through hole 111 and the circumferential edge of the flange 21 from being too large, which could result in an excessively small diameter of the through hole 111 and weaken the fastener's force in connecting the valve head 20 and the filter bottle 10, thereby ensuring the connection stability between the valve head 20 and the filter bottle 10. Similarly, the structure of the first flange 11 is similar to that of the flange 21. Specifically, r can be 2.5 mm, 3.1 mm, or 3.6 mm, and d can be 6 mm, 7 mm, or 8 mm, etc.

[0058] In one embodiment, please refer to Figures 1 to 3The thickness of flange 21 is h, and h satisfies the following: 3mm≤h≤7mm. It should be noted that the thickness of flange 21 is axially directed between filter bottle 10 and valve head 20. Therefore, h is limited to between 3mm and 7mm, i.e., greater than or equal to 3mm and less than or equal to 7mm. This ensures that flange 21 has sufficient strength to ensure a stable connection between valve head 20 and filter bottle 10, while also preventing flange 21 from being too thick, which would increase the difficulty of forming flange 21. Similarly, the thickness range of flange 21 applies to first flange 11 of filter bottle 10. Specifically, h can be 4mm, 5mm, or 6mm.

[0059] In one embodiment, please refer to Figure 2 、 Figure 3 、 Figure 5 and Figure 6 , the metal shell part 22 and the plastic lining part 23 are integrally formed. The metal shell part 22 and the plastic lining part 23 can be integrally formed by injection molding, which is manifested as: the metal shell part 22 is first molded, and then placed in an injection mold, and then the valve head 20 is injection molded, so that the metal shell part 22 and the plastic lining part 23 are integrated, which facilitates the molding of the valve head 20. Alternatively, in another embodiment, the metal shell part 22 and the plastic lining part 23 can also be integrally formed by molding or welding to improve the integrity of the valve head 20, ensure the connection stability between the valve head 20 and the external pipeline or filter bottle 10, and avoid metal contamination of tap water by metal materials, thereby ensuring the water quality of tap water. Of course, in other embodiments, the metal shell part 22 can also be configured as two half shells. After the plastic lining part 23 is molded, the metal shell part 22 is then sandwiched on the outside of the plastic lining part 23.

[0060] Further, in this embodiment, please refer to Figure 2 、 Figure 3 、 Figure 5 and Figure 6 On the side facing the filter bottle 10, the metal shell 22 is provided with an inner projection 222, and the plastic liner 23 is provided with an inner projection 222 corresponding to the inner projection 222. The inner projection 222 and the outer projection 232 are interlocked with each other. It should be noted that the inner circumference of the metal shell 22 is contoured to the outer circumference of the plastic shell. The inner projection 222 and the inner projection 232 are provided at the interface where the valve head 20 connects to the filter bottle 10, forming a concave-convex locking structure in the distribution direction of the valve head 20 and the filter bottle 10. This ensures the stability of the plastic liner 23 within the metal shell 22, prevents leakage of the valve head 20 in the gap between the metal shell 22 and the plastic liner 23, and ensures the reliability of tap water flowing through the pre-filter. The inner projection 222 and the inner projection 232 can be continuous or segmented.

[0061] For the water outlet 202 and the water inlet 201, the metal shell 22 and the plastic lining 23 have nested gaps. In this embodiment, please continue to refer to Figure 2 、 Figure 3 、 Figure 5 and Figure 6 The plastic lining portion 23 is provided with a limiting ring protrusion 231 on the outer periphery of the water inlet 201 and the water outlet 202, and the metal shell portion 22 is provided with a limiting ring groove 221 corresponding to the limiting ring protrusion 231. It can be understood that the concave and convex interlocking structures formed at the water inlet 201 and the water outlet 202 respectively can prevent the plastic lining portion 23 and the metal shell portion 22 from shaking in the direction of the water inlet 201 and the water outlet 202, thereby improving the stability of the plastic lining portion 23 in the metal shell portion 22, and further ensuring the stability of the flow of water in the channel of the plastic lining portion 23, and preventing the valve head 20 from leaking at the gap between the metal shell portion 22 and the plastic lining portion 23.

[0062] The present invention also provides a prefilter, comprising a valve head 20 for the prefilter. The specific structure of the valve head 20 is similar to that of the aforementioned embodiments. Since the present prefilter utilizes all of the technical solutions of all of the aforementioned embodiments, it possesses at least all of the beneficial effects of the technical solutions of the aforementioned embodiments, and therefore, a detailed description thereof will not be repeated here. The filter bottle 10 is connected to the valve head 20 via fasteners, thereby simplifying the production and assembly of the prefilter.

[0063] In one embodiment, please refer to 7 to Figure 11 The fastener is configured as a bolt 31, connecting the filter bottle 10 and the valve head 20 via the bolt 31. It is understood that the bolt 31 is convenient for connection, making it easier for technicians to connect the filter bottle 10 and the valve head 20. Furthermore, the connection between the filter bottle 10 and the valve head 20 requires minimal modification due to the installation of the bolt 31, ensuring a tight seal at the connection. The bolt 31 can be threaded onto one of the valve head 20 and the filter bottle 10, with the head of the bolt 31 located on the other side, to ensure a stable connection between the valve head 20 and the filter bottle 10. Alternatively, the bolt 31 can be coupled with a nut 32, with the head of the bolt 31 and the nut 32 located on opposite sides of the valve head 20 and the filter bottle 10. Specifically, in this embodiment, the nut 32 is a hexagonal nut and the bolt 31 is an M6 bolt. In other embodiments, the nut 32 can also be a square nut and the bolt 31 can be an M8 bolt. Of course, in other embodiments, the fastener can also be a rivet, connecting the filter bottle 10 and the valve head 20 via riveting.

[0064] In one embodiment, please refer to Figure 9 、 Figure 10 and Figure 11The fastener also includes a nut 32, which is threadedly connected to a bolt 31 on the side of the filter bottle 10 facing away from the valve head 20. It will be appreciated that the nut 32 is provided at the connection between the filter bottle 10 and the valve head 20, and the bolt 31 is inserted from the valve head 20 to the filter bottle 10. The bolt 31 is then threadedly connected to the nut 32 to ensure a stable connection between the valve head 20 and the filter bottle 10. In this manner, the bolt 31 is threadedly connected to the nut 32, eliminating the need for threads on the wall of the through-hole 111 and reducing the difficulty of molding the valve head 20 or the filter bottle 10. Furthermore, if the threads become worn, the connection between the valve head 20 and the filter bottle 10 can be restored by replacing the bolt 31 and nut 32, facilitating subsequent maintenance and extending the service life of the pre-filter. Of course, in other embodiments, the through-hole 111 can also be threadedly connected to the bolt 31.

[0065] In one embodiment, please refer to Figures 7 to 12 A retaining groove 122 is provided on the side of the filter bottle 10 facing away from the valve head 20. The retaining groove 122 defines a mounting opening 121. The nut 32 is installed in the retaining groove 122 through the mounting opening 121 and engages with the retaining groove 122 in a circumferentially limited manner. It should be noted that, under the restraining action of the retaining groove 122, the nut 32 can be pre-fixed to the first flange 11 and remain stable within the retaining groove 122. During assembly of the valve head 20 and the filter bottle 10, the nut 32 is first installed in the retaining groove 122. Then, the bolt 31 is passed from the through-hole 111 of the flange 21 to the through-hole 111 of the first flange 11 and connected to the nut 32. In this way, the user only needs to operate on the bolt 31 during the threaded connection process, without having to operate both the nut 32 and the bolt 31 simultaneously. This improves the convenience of connecting the bolt 31 and the nut 32, and thus, the convenience of connecting the valve head 20 and the filter bottle 10. Of course, in other embodiments, the nut 32 may also be integrally formed in the first flange 11 with the filter bottle 10 , and the bolt 31 passing through the through hole 111 of the first flange 11 is also connected to the nut 32 .

[0066] The present invention also proposes a water use system, which includes the aforementioned pre-filter. The specific structure of the pre-filter refers to the above-mentioned embodiment. Since the present water use system adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0067] Among them, the water use system at least includes relevant components from the pre-filter to the water use end. For example, the water use system may include household appliances such as water heaters, dishwashers, and water dispensers, and may also include accessories such as water pipes for domestic water use throughout the house.

[0068] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A valve head of a pre-filter, characterized in that: include: A plastic lining portion, wherein the plastic lining portion is provided with a water inlet and a water outlet; as well as a metal outer shell portion, the metal outer shell portion being sleeved on the plastic lining portion, and the metal outer shell portion being used to connect to the filter bottle of the pre-filter; The metal shell portion is provided with a connection structure, and at least one of the metal shell portion and the filter bottle is provided with a through hole, and the connection structure is connected to the filter bottle by a fastener passing through the through hole.

2. The valve head of the prefilter according to claim 1, characterized in that: The connection structure is configured as a flange arranged along the periphery of the metal shell portion, and the flange is provided with the through hole for the fastener to pass through.

3. The valve head of the pre-filter according to claim 2, characterized in that: The outer periphery of the flange is polygonal or quasi-polygonal, and the through holes are arranged at the corners of the flange.

4. The valve head of the prefilter according to claim 3, characterized in that: The corner of the flange is configured as a rounded corner, and the center of the through hole and the center of the corner of the flange are at the same position.

5. The valve head of the pre-filter according to claim 2, characterized in that: The distance between the two opposite sides of the flange is L, the inner diameter of the valve head is D, and L and D satisfy: 5.4 mm ≤ LD ≤ 9.4 mm.

6. The valve head of the prefilter according to claim 2, characterized in that: The radius of the through hole is r, and the distance from the center of the through hole to the side of the flange is d. The r and d satisfy: 2.1 mm≤dr≤5.7 mm.

7. The valve head of the prefilter according to claim 2, characterized in that: The thickness of the flange is h, and h satisfies: 3mm≤h≤7mm.

8. The valve head of the prefilter according to any one of claims 1 to 7, characterized in that: The metal outer shell portion and the plastic lining portion are integrally formed.

9. The valve head of the pre-filter according to claim 8, characterized in that: On the side facing the filter bottle, the metal shell portion is provided with an embedded ring protrusion, and the plastic lining portion is provided with an embedded ring groove corresponding to the embedded ring protrusion, and the embedded ring groove and the embedded ring protrusion are embedded with each other.

10. The valve head of the pre-filter according to claim 8, characterized in that: The plastic lining portion is provided with limiting ring protrusions on the outer peripheries of the water inlet and the water outlet, and the metal outer shell portion is provided with limiting ring grooves that are embedded in and corresponding to the limiting ring protrusions.

11. A pre-filter, characterized in that: A valve head comprising a filter bottle and a pre-filter according to any one of claims 1 to 10, wherein the valve head is connected to the filter bottle.

12. The pre-filter according to claim 11, characterized in that The fastener includes a bolt, and the filter bottle and the valve head are connected by the bolt.

13. The pre-filter according to claim 12, wherein: The fastener further comprises a nut which is threadedly connected to the bolt on a side of the filter bottle facing away from the valve head.

14. The pre-filter according to claim 13, wherein: A limiting groove is provided on a side of the filter bottle away from the valve head. The limiting groove is provided with a mounting opening. The nut is mounted in the limiting groove from the mounting opening and is fitted in the limiting groove in a circumferential upper limit position.

15. A water system, characterized in that: The method comprises the pre-filter according to any one of claims 11 to 14.

Images