Water purifier based on PCR (Polymerase Chain Reaction) composite filter element

Abstract

The utility model discloses a water purifier based on a PCR (Polymerase Chain Reaction) composite filter element, which comprises the PCR composite filter element, a booster pump, an RO (Reverse Osmosis) filter element and a pure water tank, water prepared by the PCR composite filter element can be directly supplied to a user after being filtered again by the booster pump and the RO filter element, and can also be stored in the pure water tank and then supplied to the user; the device is characterized in that the water tank is provided with a backflow pipeline, and pure water in the water tank flows back to the front of the booster pump; two water ways are arranged between the water tank and the water outlet faucet and controlled by the first water pump and the second water pump respectively, and the second water pump with the small flow speed flows through the instant heating module of the water outlet faucet and then discharges water. According to the utility model, secondary RO filtration is carried out through backflow of the pure water tank, so that on one hand, the water quality is improved, and on the other hand, the burden of the RO filter element is also reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of water purification equipment, and in particular relates to a water purifier based on a PCR composite filter element. Background Art

[0002] As people's lives are getting better and better, water quality problems are becoming more and more serious, seriously threatening the physical and mental health of the people. It is necessary to purify water according to the characteristics of water pollution. The current purification technologies on the market are generally divided into the following points: 1) Removal of organic matter in water sources. The methods currently used to remove or reduce organic pollutants in water sources include chemical oxidation, mainly ozone oxidation, hydrogen peroxide oxidation, potassium permanganate oxidation, photocatalytic oxidation and their combined processes; 2) Physical adsorption, including granular activated carbon adsorption (GAC) and powdered activated carbon adsorption ( PAC) etc.; 3) Biological oxidation method, such as biological contact oxidation method, aerobic biological filter method, biological rotary disc, biological fluidized bed and biological ceramsite technology etc.; enhanced coagulation method, such as changing the pH value of water, increasing the dosage of coagulant, or reasonably adding new organic and inorganic polymer coagulants, etc., to improve the coagulation conditions and improve the removal effect of organic matter; 4) Membrane filtration technology, such as microfiltration and nanofiltration, ultrafiltration UF, reverse osmosis RO technology etc.; according to the characteristics of the water source water quality and the requirements for the water quality of the effluent, sometimes several technologies need to be combined to ensure the safety of drinking water. The filter element of the water purifier is its core component. It removes impurities and bacteria in the water through physical methods such as filtration and adsorption, turning tap water into purified water without causing secondary pollution.

[0003] The PCR composite filter element is composed of PP cotton, activated carbon and post-RO membrane, that is, three different filter materials are contained in the same filter element, which can be used for different filtering purposes. Its specific structure can be found in another prior application CN111661944A of the applicant. The water purifier using the PCR composite filter element needs to make corresponding changes in the overall machine layout and waterway design. Summary of the invention

[0004] The purpose of the utility model is to meet this demand and provide a water purifier based on a PCR composite filter element.

[0005] The technical solution of the utility model is as follows: a water purifier based on a PCR composite filter element, comprising a PCR composite filter element, a booster pump, an RO filter element and a pure water tank. The water produced by the PCR composite filter element can be directly provided to the user after being filtered again by the booster pump and the RO filter element, or it can be stored in the pure water tank before being provided to the user; it is characterized in that: the water tank is provided with a reflux pipeline to return the pure water in the water tank to the front of the booster pump; there are two water channels between the water tank and the water outlet faucet, which are respectively controlled by a first water pump and a second water pump, wherein the second water pump with a smaller flow rate flows through the instant heating module of the water outlet faucet and then discharges water.

[0006] Furthermore, a liquid level sensor and a TDS sensor are provided in the water tank, and a displacement actuator is provided on the return pipe of the water tank, which determines the on-off of the return pipe according to the change of the liquid level in the water tank and the TDS value data.

[0007] Since the amount of each filter material in the composite filter is small, the removal rate of impurities and ions in the water is relatively low. In particular, the ion removal rate of the RO filter is difficult to be satisfactory. In the case of poor raw water quality, the filtered pure water may still not reach a satisfactory outlet water quality. Therefore, through the return of the pure water tank, it is subjected to secondary RO filtration, which improves the water quality on the one hand and reduces the burden of the RO filter on the other hand. The replacement actuator can determine whether the pure water in the water tank has been stored for a long time based on the liquid level change and TDS data. If so, it will be returned to the front of the pump for secondary filtration first, so as to ensure the quality of the pure water in the water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the utility model.

[0009] Figure 2 It is a waterway diagram of the utility model. DETAILED DESCRIPTION

[0010] See the attached drawings. This embodiment includes a PCR composite filter element 21, a booster pump 1, an RO filter element 22, a pure water tank 3, a faucet 4, a first water pump 5 and a second water pump 6. The filter element and the water pump are connected to a waterway board 7. The waterway board has three water inlets and outlets, namely a raw water inlet 71, a pure water outlet 72 and a waste water outlet 73. The raw water is filtered by the PCR composite filter element 21 and then pressurized by the booster pump 1 before entering the RO filter element 22. The pure water obtained can be directly discharged through the faucet 4 or temporarily stored in the pure water tank 3; the pure water tank has a reflux pipeline, which is controlled by a displacement actuator 8 and refluxes to the front of the booster pump 1; the water tank has two water outlets provided to the faucet 4, which are respectively controlled by a larger first water pump 5 and a smaller second water pump 6, and the faucet 4 is provided with an instant heating module, and the water outlet of the second water pump 6 is heated by the instant heating module before being discharged.

[0011] When the user needs hot water, the second water pump 6 draws pure water from the water tank, heats it and provides it to the user; when the user needs normal temperature water, the composite filter element 2 produces water and provides it directly to the user; when the user needs a large flow of normal temperature water, the first water pump 5 draws pure water from the water tank and provides it to the user.

Claims

1. A water purifier based on a PCR composite filter element, comprising a PCR composite filter element, a booster pump, an RO filter element and a pure water tank. The water produced by the PCR composite filter element is filtered again by the booster pump and the RO filter element and then directly provided to the user, or first stored in a pure water tank and then provided to the user; characterized in that: The water tank is provided with a reflux pipeline to return the pure water in the water tank to the front of the booster pump; there are two water paths between the water tank and the water outlet faucet, which are respectively controlled by the first water pump and the second water pump, among which the second water pump with a smaller flow rate flows through the instant heating module of the water outlet faucet and then discharges water.

2. A water purifier based on a PCR composite filter element as claimed in claim 1, characterized in that: A liquid level sensor and a TDS sensor are installed in the water tank, and a displacement actuator is installed on the return pipe of the water tank. The on-off of the return pipe is determined according to the change of the liquid level in the water tank and the TDS value data.

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