Water purifier capable of reducing microbial contamination

Abstract

The utility model discloses a water purifier that can reduce microbial pollution, which comprises a water inlet tee joint, a water inlet electromagnetic valve one, a pretreatment filter core, a booster pump, an RO membrane, a check valve, a faucet, a compressor, a water inlet electromagnetic valve two, a water inlet electromagnetic valve three, a combined flushing electromagnetic valve, a temperature probe and a control unit. The control unit is configured to: when the standby time is greater than or equal to t0 and the temperature probe detects that the water temperature is greater than P0, start the water inlet electromagnetic valve three, the compressor, the booster pump and the combined flushing electromagnetic valve, so that the ice water produced by the compressor is returned to the inlet of the pretreatment filter core through the water inlet electromagnetic valve three, and after the pretreatment filter core and the RO membrane are circularly flushed, the water is discharged from the wastewater outlet through the combined flushing electromagnetic valve; when the water temperature is less than or equal to P0, stop flushing after a delay of T0. The utility model effectively inhibits the reproduction of microorganisms through low-temperature ice water circular flushing, simultaneously dilutes the concentrated water in the RO membrane cavity to reduce the TDS of the head cup water, prolongs the service life of the filter core, and improves the water purification hygiene safety and user experience.

Description

Technical Field

[0001] This utility model relates to the technical field of drinking water treatment equipment, and in particular to the technical field of a water purifier that can reduce microbial contamination. Background Technology

[0002] After a period of use, excessive microbial levels are a common problem with water purifiers. This is mainly manifested when users turn the purifier back on after a long period of inactivity, resulting in foul-smelling water, especially noticeable during the high temperatures of summer. The root cause is the proliferation of microorganisms in the stagnant water inside the purifier at room temperature. Current technologies, such as conventional antibacterial methods (e.g., ultraviolet sterilization, ozone sterilization), are insufficient to effectively address the problem of microbial growth inside the water system during periods of inactivity. Therefore, there is an urgent need to develop a microbial control mechanism that inhibits microbial growth at its source. Utility Model Content

[0003] The purpose of this invention is to solve the problem of excessive microorganisms in the internal water of water purifiers due to prolonged shutdown in the prior art. It proposes a water purifier that can reduce microbial pollution. It can extract low-temperature ice water through a compression mechanism and automatically circulate and flush the entire water circuit when the standby water temperature exceeds the threshold, thereby simultaneously inhibiting microbial growth and diluting the RO membrane concentrate.

[0004] To achieve the above objectives, this utility model proposes a water purifier that can reduce microbial contamination, comprising: The inlet tee connects to the water source at its inlet and to the first inlet of the inlet solenoid valve at its first outlet. The second outlet connects to the second inlet of the inlet solenoid valve at its second outlet. The inlet solenoid valve is connected to the inlet of the pretreatment filter cartridge via its outlet. The pretreatment filter element has its outlet connected to the inlet of the booster pump; The booster pump has its outlet connected to the RO membrane inlet. The RO membrane has its pure water outlet connected to a faucet via a check valve, and its wastewater outlet connected to a combined flushing solenoid valve. Water inlet solenoid valve two, its outlet is connected to the compressor inlet; The compressor's outlet is split into two paths via a tee: the first path connects to the tap; the second path connects to the second terminal of the inlet solenoid valve. The first end of the third inlet solenoid valve is connected to the pipeline between the outlet of the first inlet solenoid valve and the inlet of the pretreatment filter element. Temperature probe is installed in the RO membrane inlet pipe; The control unit is configured as follows: When the standby time is ≥t0 and the water temperature detected by the temperature probe is >P0, the inlet solenoid valve 3, compressor, booster pump and combined flushing solenoid valve are started, so that the ice water produced by the compressor flows back to the inlet of the pretreatment filter element through the inlet solenoid valve 3, and after circulating and flushing the pretreatment filter element and RO membrane, it is discharged from the wastewater outlet through the combined flushing solenoid valve. When the water temperature is ≤ P0, stop rinsing after a delay of T0.

[0005] Preferably, P0 is the temperature threshold for inhibiting the growth of thermophilic bacteria; further, P0 is 15°C.

[0006] Preferably, 4. t0 is 30 minutes.

[0007] Preferably, the flow rate of the ice water circulation flushing is ≥0.7L / min.

[0008] Preferably, the control unit responds to the user's water intake operation during the rinsing process by first interrupting the rinsing and executing the water intake command.

[0009] Preferably, the ice water circulation flushing simultaneously dilutes the concentrated water in the RO membrane cavity.

[0010] Preferably, the water purifier also includes a pure water storage tank and an ice tank. The pure water storage tank is connected to the pure water outlet of the RO membrane through a check valve. The ice tank is connected to the refrigeration end of the compressor to store ice water, and its outlet tee is connected to the second end of the inlet solenoid valve and the faucet. The capacity of the ice tank is 0.8-1L.

[0011] The beneficial effects of this utility model are: 1. This utility model uses a compression mechanism to draw low-temperature ice water for circulating flushing of the entire machine's water circuit, significantly reducing the system's stagnant water temperature to the microbial growth inhibition threshold (≤15℃), fundamentally solving the problem of excessive microorganisms during shutdown.

[0012] 2. This invention uses ice water reflux to simultaneously dilute the concentrate in the RO membrane chamber, reducing the TDS value of the first cup water, achieving a "zero stagnant water" effect and extending the service life of the RO membrane.

[0013] 3. This utility model adopts a temperature-triggered automatic flushing mechanism (starts when the standby time is ≥30 minutes and the water temperature is >15℃), and prioritizes interrupting the flushing when the user takes water, taking into account both antibacterial efficiency and user experience.

[0014] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a water purifier that can reduce microbial contamination according to this utility model.

[0016] In the diagram: 1-Inlet tee, 2-Inlet solenoid valve one, 3-Pretreatment filter element, 4-Boost pump, 5-RO membrane, 7-Check valve, 8-Compressor, 10-Inlet solenoid valve two, 11-Faucet, 12-Combined flushing solenoid valve, 13-Temperature probe, 14-Inlet solenoid valve three. Detailed Implementation

[0017] See Figure 1 This utility model includes: The inlet tee 1 has its inlet connected to the water source, its first outlet connected to the inlet of the inlet solenoid valve 1 2, and its second outlet connected to the inlet of the inlet solenoid valve 2 10. The outlet of the inlet solenoid valve 2 is connected to the inlet of the pretreatment filter element 3. Pretreatment filter element 3, its outlet is connected to the inlet of booster pump 4; Booster pump 4, whose outlet is connected to the inlet of RO membrane 5; The RO membrane 5 has its pure water outlet connected to the faucet 11 via the check valve 7, and its wastewater outlet connected to the combined flushing solenoid valve 12. The water inlet solenoid valve 210 has its outlet connected to the inlet of the compressor 8. The compressor 8 has its outlet split into two paths via a tee: the first path connects to the tap 11; the second path connects to the second end of the inlet solenoid valve 14. The first end of the inlet solenoid valve 314 is connected to the pipeline between the outlet of the inlet solenoid valve 2 and the inlet of the pretreatment filter element 3. Temperature probe 13 is installed in the inlet pipe of RO membrane 5; The control unit is configured as follows: When the standby time is ≥t0 and the water temperature detected by temperature probe 13 is >P0, the inlet solenoid valve 14, compressor 8, booster pump 4 and combined flushing solenoid valve 12 are started, so that the ice water produced by compressor 8 flows back to the inlet of pretreatment filter element 3 through inlet solenoid valve 14, and after circulating and flushing pretreatment filter element 3 and RO membrane 5, it is discharged from wastewater outlet through combined flushing solenoid valve 12. When the water temperature is ≤ P0, stop rinsing after a delay of T0.

[0018] The working process of this utility model: The working process of this utility model water purifier, which can reduce microbial contamination, is described in conjunction with the accompanying drawings.

[0019] When a user normally takes room temperature pure water, the inlet solenoid valve 2 and the booster pump are powered on, while the temperature probe, inlet solenoid valve 2, and inlet solenoid valve 3 are not powered on. The flow rate of room temperature water is Q1 (to ensure user experience and reduce water intake waiting time, Q1 is preferably above 1L / h). When the user is taking ice water normally, the inlet solenoid valve 12, the inlet solenoid valve 210, the booster pump 4, and the compressor 8 are powered on and working, while the temperature probe 13 and the inlet solenoid valve 314 are not powered on. The compressor 8 produces ice water at a temperature as low as 5°C, the ice tank 9 has a capacity of 0.8-1L, and the ice water flow rate Q2 (up to 0.7L / min). When the whole machine is in standby mode, the inlet solenoid valve 12, inlet solenoid valve 20, inlet solenoid valve 34, booster pump 4, and compressor 8 are not powered on, while temperature probe 13 is powered on. When the standby time of the whole machine is ≥t0 (t0 is preferably 30 minutes) and the water temperature detected by temperature probe 13 is P > P0 (P0 is preferably 15℃, the optimal growth temperature range for thermophilic bacteria is approximately between 20-45 degrees Celsius, and their growth rate will be slower at 15℃): inlet solenoid valve 314 is powered on and opened, compressor 8 and booster pump 4 are powered on and operated, and 5℃ ice water in the cold tank 9 circulates to flush the filter cartridges of pretreatment filter cartridge 3 and RO membrane 5, and is discharged from the wastewater outlet; When P≤P0, the inlet solenoid valve 14, compressor 8, and booster pump 4 will stop working after a delay of T0 (calculated based on the backflow flushing flow rate and membrane chamber volume); this will reduce the internal water temperature of the whole machine during standby, inhibit the growth rate of microorganisms, and thus effectively reduce the microbial pollution of the water purifier.

[0020] Furthermore, when the ice water is circulating for rinsing, if the user turns on the tap to get room temperature water or ice water, the user with priority will get water and the rinsing process will be stopped. It is preferable to use compressor 8 for ice water production instead of cooling tank 9, because cooling tank 9 can only reach a temperature range of 10-15℃, and the ice water production efficiency is extremely low, only 2L / H, the ice water is not cold and the waiting time is too long. The preferred faucet 11 is a smart faucet, which facilitates the operation of the electronic control logic. When the user takes room temperature water or ice water, the corresponding electrical components are switched on and off. The entire machine is rinsed with ice water circulation, which can not only effectively reduce microbial contamination of the water purifier, but also simultaneously dilute the high TDS concentrate in the RO membrane chamber, reduce the TDS of the water in the RO membrane head cup, reduce stagnant water, extend the service life of the RO membrane, and improve the user experience.

[0021] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A water purifier that can reduce microbial contamination, characterized in that, include: The inlet tee (1) is connected to the water source, the first outlet is connected to the inlet of the first inlet solenoid valve (2), and the second outlet is connected to the inlet of the second inlet solenoid valve (10). The inlet solenoid valve is 1 (2), and its outlet is connected to the inlet of the pretreatment filter element (3); The pretreatment filter element (3) has its outlet connected to the inlet of the booster pump (4); Booster pump (4), whose outlet is connected to the inlet of RO membrane (5); The RO membrane (5) has its pure water outlet connected to the faucet (11) via the check valve (7) and its wastewater outlet connected to the combined flushing solenoid valve (12). The second inlet solenoid valve (10) has its outlet connected to the inlet of the compressor (8); The compressor (8) has its outlet split into two paths via a tee: the first path connects to the tap (11); the second path connects to the second end of the inlet solenoid valve (14). The first end of the inlet solenoid valve three (14) is connected to the pipeline between the outlet of the inlet solenoid valve one (2) and the inlet of the pretreatment filter element (3); Temperature probe (13) is installed in the inlet pipe of RO membrane (5); The control unit is configured as follows: When the standby time is ≥t0 and the water temperature detected by the temperature probe (13) is >P0, the inlet solenoid valve three (14), compressor (8), booster pump (4) and combined flushing solenoid valve (12) are started, so that the ice water produced by the compressor (8) flows back to the inlet of the pretreatment filter element (3) through the inlet solenoid valve three (14), and the pretreatment filter element (3) and RO membrane (5) are flushed by ice water circulation, and then discharged from the wastewater outlet through the combined flushing solenoid valve (12); When the water temperature is ≤ P0, stop rinsing after a delay of T0.

2. The water purifier according to claim 1, characterized in that: P0 is the temperature threshold for inhibiting the growth of thermophilic bacteria.

3. The water purifier according to claim 2, characterized in that: The P0 is 15℃.

4. The water purifier according to claim 1, characterized in that: t0 is 30 minutes.

5. The water purifier according to claim 1, characterized in that: The flow rate of the ice water circulation flushing is ≥0.7L / min.

6. The water purifier according to claim 1, characterized in that: During the rinsing process, the control unit responds to the user's water intake operation by first interrupting the rinsing and executing the water intake command.

7. The water purifier according to claim 1, characterized in that: The ice water circulation rinse simultaneously dilutes the concentrated water in the RO membrane cavity (5).

8. The water purifier according to claim 1, characterized in that: It also includes a pure water storage tank (6) and an ice tank (9). The pure water storage tank (6) is connected to the pure water outlet of the RO membrane (5) through a check valve (7). The ice tank (9) is connected to the refrigeration end of the compressor (8) to store ice water. Its outlet tee is connected to the second end of the inlet solenoid valve (14) and the faucet (11). The capacity of the ice tank (9) is 0.8-1L.

Images