Patent Application
20230151592
The present invention relates to water filtering equipment, and more particularly to a backflow preventer for water filtering equipment.
Rapid industrial development nowadays has relatively caused excessive pollution of air, land, and water sources. Although tap water undergoes precipitation, disinfection, and insolation procedures in the water purification plant before it is delivered to each user, these procedures cannot completely remove all kinds of pollutants, and it will endanger health when used. In order to ensure the safety of water, many people use all kinds of the water filtering equipment to filter the water before using it. Many of the water filtering equipment employs reverse osmosis (RO) water purifier.
The RO water purifier currently known has several filtering units, the filtering unit comprises the filter, the RO membrane and the pressure tank, the filtering unit is provided with the connector, so that the connector can be connected through the water pipes. Therefore the filtering unit is connected to each other, and the connector can be used to connect the water source. The water supplied from the water source is filtered through the filter unit and the RO membrane to produce pure water. At the same time, various impurities and harmful substances that cannot penetrate the filter element and the RO membrane when the concentrated waste water is discharged.
However, the above-mentioned conventional structure still has the following problems in practical applications: the connector can only provide water to pass through, but has no backstop function. Therefore, if water backflow occurs during water production, it may cause the filtering unit being damaged, and the pure water is mixed with waste water.
Therefore, it is desirable to provide a backflow preventer for water filtering equipment to mitigate and/or obviate the aforementioned problems.
An objective of present invention is to provide a backflow preventer for water filtering equipment.
To achieve these and other objects of the present invention, A backflow preventer for water filtering equipment, the water filtering equipment has a plurality of filtering units, the filtering units connected among each other via at a plurality of connectors connected by at least one hose and connected to a water source via the at least one of the connectors, and at least one of the connectors has a check valve set, and the check valve set has a check valve and an unidirectional valve. The check valve has an elastic tube with a duckbill valve at one end and is connected to a base at another end, and the base has a socket sleeved onto the elastic tube. The unidirectional valve has a first main portion with a larger diameter and a second main portion with a smaller diameter, the diameter of the second main portion corresponding to an inner diameter of the socket of the check valve; after the check valve is placed in the first open end of the connector, the second main portion of the unidirectional valve is inserted into the socket of the check valve; and the unidirectional valve further has a through aperture passing through the first main portion and the second main portion.
Other objects, advantages, and novel features of invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
First, please refer to
Moreover, the water filtering equipment 10 is a reverse osmosis (RO) water purifier, and the filtering unit 11 is a filter, a RO membrane, or a pressure barrel
Also, the check valve set 30 is configured for being installed in the connector 20.
Furthermore, the check valve set 30 is mounted on the at least one of the connectors 20 for connecting to the water source.
In addition, at least one of the connectors 20 is a quick disconnect connector, as shown in
Additionally, the at least one of the connectors 20 is a locking connector, as shown in
Furthermore, the second main portion 322 of the unidirectional valve 32 is secured with the socket 314 of the check valve 31.
Moreover, the elastic tube 311 of the check valve 31 further has a protruding stopping ring 315.
Additionally, the valve 312 of the check valve 31 is elongated as shown in
Besides, the check valve 31 is made of rubber, and the rubber has an 80 Shore A hardness.
In actual use, since the check valve set 30 is plugged and secured in the first open end 201 of the connector 20. When the water source is fed into the through aperture 323, a forward hydraulic pressure with the elasticity provided by the check valve 31 allows the valve 312 to be opened smoothly, as shown in
The above mentioned backflow preventer for water filtering equipment has the following advantages: 1. The installation of the check valve set 30 can prevent the water backflow during the use of the water filtering equipment 10, so that the water quality can be ensured, and it can also prevent the water filtering equipment 10 from being damaged due to the backflow of water. 2. The check valve set 30 uses the check valve 31 and the unidirectional valve 32 to cooperate with each other to maximize the anti-backflow effect and prevent the high water pressure caused by backflow pushes the check valve 31 away from the connector 20.
Although the present invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of invention as hereinafter claimed.
