US-20260126128-A1 - FAUCET

US20260126128A1US 20260126128 A1US20260126128 A1US 20260126128A1US-20260126128-A1

Abstract

A faucet includes a valve body. A water inlet pipe and a water outlet pipe are longitudinally or transversely arranged in the valve body. A transfer cavity is formed in an upper end inside the valve body, the water outlet pipe is connected to a side surface of the transfer cavity, a piston is provided inside the transfer cavity, and an upper end of the transfer cavity is communicated with external atmosphere. The water inlet pipe includes a first pipe and a second pipe. The second pipe communicates with a bottom of the transfer cavity and a valve core, and the first pipe communicates with the valve core and a water source. The valve core is arranged on one side of the valve body, and a hand wheel is provided outside the valve core and is configured to open and close the valve core.

Inventors

Ruizhi Ling

Assignees

SHANGHAI AQUACUBIC SANITARYWARE CO., LTD

Dates

Publication Date: 20260507
Application Date: 20251231
Priority Date: 20251127

Claims (7)

1 . A faucet, comprising: a valve body, wherein a water inlet pipe and a water outlet pipe are provided in the valve body, and both the water inlet pipe and the water outlet pipe are longitudinally or transversely arranged in the valve body; a transfer cavity is formed in an upper end inside the valve body, the water outlet pipe is connected to a side surface of the transfer cavity, a piston is provided inside the transfer cavity, and an upper end of the transfer cavity is communicated with external atmosphere; the water inlet pipe comprises a first pipe and a second pipe, wherein the second pipe communicates with a bottom of the transfer cavity and a valve core, and the first pipe communicates with the valve core and a water source; and the valve core is arranged on one side of the valve body, a hand wheel is provided outside the valve core, and the hand wheel is configured to open and close the valve core.
2 . The faucet according to claim 1 , wherein an air inlet cover is connected to an upper end of the transfer cavity, and an upper end of the air inlet cover has a hollow structure that allows air to be able to enter the transfer cavity.
3 . The faucet according to claim 2 , wherein a dustproof cover is fixed to the upper end of the air inlet cover, and a gap is left between the dustproof cover and the air inlet cover, allowing air to be able to enter the transfer cavity.
4 . The faucet according to claim 2 , wherein a support rod is provided at a bottom of the air inlet cover, the piston is slidably connected to the support rod, and the piston is adapted to an inner diameter of the transfer cavity.
5 . The faucet according to claim 1 , wherein a recess is formed in one end of the second pipe, a protrusion is provided at a lower end of the piston, a first sealing ring is provided outside the protrusion, and the protrusion and the first sealing ring are inserted into and adapted to the recess; and a second sealing ring is provided at an upper end of the piston.
6 . The faucet according to claim 1 , wherein a size of a junction between the transfer cavity and the water outlet pipe is not greater than an inner size of the piston.
7 . The faucet according to claim 1 , wherein the water inlet pipe is a single cold water pipe or a dual hot-and-cold water pipe.

Description

TECHNICAL FIELD The present disclosure relates to the technical field of water supply devices, and in particular, to a faucet. BACKGROUND The faucet is one of the most commonly used water-dispensing components. However, during use, it often faces the issue that when turned off, residual liquid remains inside the pipeline, which can lead to backflow and contaminate the clean water supply, thereby affecting normal operation. To address this issue, in the prior art, Chinese patent CN205824315U titled “Frost-Proof and Anti-Siphon Wall-Mounted Faucet” incorporates an air inlet hole and an air inlet head in a right valve body, constituting an anti-siphon structure to prevent backflow and contamination. However, this art still carries a risk of backflow when the faucet is in a semi-open or semi-closed state. Therefore, to effectively solve the above problem, there is an urgent need to develop relevant technical solutions. In view of this, the present application is specifically proposed. SUMMARY An objective of the present disclosure is to provide a faucet to solve the above problem. To achieve the above objective, the present disclosure specifically adopts the following technical solution: Provided is a faucet, including: a valve body, where a water inlet pipe and a water outlet pipe are provided in the valve body, and both the water inlet pipe and the water outlet pipe are longitudinally or transversely arranged in the valve body;a transfer cavity is formed in an upper end inside the valve body, the water outlet pipe is connected to a side surface of the transfer cavity, a piston is provided inside the transfer cavity, and an upper end of the transfer cavity is communicated with external atmosphere;the water inlet pipe includes a first pipe and a second pipe, where the second pipe communicates with a bottom of the transfer cavity and a valve core, and the first pipe communicates with the valve core and a water source; andthe valve core is arranged on one side of the valve body, a hand wheel is provided outside the valve core, and the hand wheel is configured to open and close the valve core. In some embodiments, an air inlet cover is connected to an upper end of the transfer cavity, and an upper end of the air inlet cover has a hollow structure, allowing air to be able to enter the transfer cavity. In some embodiments, a dustproof cover is fixed to the upper end of the air inlet cover, and a gap is left between the dustproof cover and the air inlet cover, allowing air to be able to enter the transfer cavity. In some embodiments, a support rod is provided at a bottom of the air inlet cover, the piston is slidably connected to the support rod, and the piston is adapted to an inner diameter of the transfer cavity. In some embodiments, a recess is formed in one end of the second pipe, a protrusion is provided at a lower end of the piston, a first sealing ring is provided outside the protrusion, and the protrusion and the first sealing ring are inserted into and adapted to the recess; and a second sealing ring is provided at an upper end of the piston. In some embodiments, a size of a junction between the transfer cavity and the water outlet pipe is not greater than an inner size of the piston. In some embodiments, the water inlet pipe is a single cold water pipe or a dual hot-and-cold water pipe. The beneficial effects of the present disclosure are as follows: In the present disclosure, the transfer cavity is formed in the upper end inside the valve body, the water outlet pipe is connected to the side surface of the transfer cavity, the piston is provided inside the transfer cavity, and the upper end of the transfer cavity is communicated with the external atmosphere. When there is a negative pressure in the transfer cavity, that is, when backflow is about to occur, the piston moves downward under the action of the negative pressure to block the transfer cavity and a water outlet of the water inlet pipe, thereby effectively preventing a pollution source from flowing back from the water outlet pipe to pollute the water source. In order to explain the structural features and effects of the present disclosure more clearly, it will be described in detail below in combination with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a stereoscopic view of a single-cold faucet according to the present disclosure; FIG. 2 is a sectional view of a single-cold faucet according to the present disclosure; FIG. 3 is a partial sectional view of a single-cold faucet according to the present disclosure; FIG. 4 is a stereoscopic view of a hot-and-cold faucet according to the present disclosure; and FIG. 5 is a schematic diagram of another embodiment of a faucet according to the present disclosure. Reference Numerals: 1. Valve body; 2. Water inlet pipe; 201. First pipe; 202. Second pipe; 3. Water outlet pipe; 4. Transfer cavity; 5. Piston; 6. Valve core; 7. Hand wheel; 8. Air inlet cover; 9.