Water purifier capable of adjusting water outlet temperature

Abstract

The water purifier comprises a filter element, a hot tank and a normal-temperature water tank, the temperature of water in the hot tank is kept not lower than 90 DEG C, a first diaphragm pump and a second diaphragm pump are arranged at the water outlet end of the hot tank, and a third diaphragm pump and a fourth diaphragm pump are arranged at the water outlet end of the normal-temperature water tank. Wherein the flow of the first diaphragm pump is smaller than that of the second diaphragm pump, and the flow of the third diaphragm pump is smaller than that of the fourth diaphragm pump; the flow speed of the four diaphragm pumps is controlled by a control module, and the water outlet ends of the four diaphragm pumps are converged to a water mixing device to be mixed and then output water. According to the utility model, a plurality of diaphragm pumps are used for extracting water at different temperatures in a fixed proportion, so as to obtain outlet water meeting the temperature and flow requirements. The small diaphragm pump is mainly used for adjusting and controlling the flow, due to the fact that the rated flow of the diaphragm pump is small, the flow error caused by voltage fluctuation is small, and the water flow at different temperatures can be accurately controlled.

Description

Technical Field

[0001] The utility model belongs to the technical field of water purification equipment, in particular to a water purifier capable of adjusting the outlet water temperature. Background Art

[0002] Water purifiers usually have a heating function and can provide users with both high-temperature and normal-temperature water. High-temperature water generally refers to water at 95°C or above, which is suitable for brewing tea. However, users always have more requirements, such as requiring water at a specific temperature, such as 65°C, 80°C, etc. The existing technology cannot meet this demand, and users can only manually mix high-temperature water and normal-temperature water to obtain water that roughly meets their expectations between high-temperature and normal-temperature water. Summary of the invention

[0003] The purpose of the utility model is to overcome the above-mentioned defects and provide a water purifier with adjustable water outlet temperature.

[0004] To this end, the utility model adopts the following technical solution: a water purifier with adjustable water outlet temperature, including a filter element, a hot tank and a normal temperature water tank, the water in the hot tank is kept at a temperature not lower than 90°C, and is characterized in that: a first diaphragm pump and a second diaphragm pump are provided at the water outlet of the hot tank, and a third diaphragm pump and a fourth diaphragm pump are provided at the water outlet of the normal temperature water tank, wherein the flow rate of the first diaphragm pump is smaller than that of the second diaphragm pump, and the flow rate of the third diaphragm pump is smaller than that of the fourth diaphragm pump; the flow rates of the above four diaphragm pumps are all controlled by a control module, and the water outlets of the four diaphragm pumps are gathered to a water mixing device for mixing and then the water is discharged.

[0005] The hot tank and the normal temperature water tank are both provided with temperature sensors. The control module calculates the proportion of water taken from the hot tank and the normal temperature water tank according to user requirements and real-time temperature data of the temperature sensor. When the water supply of the hot tank or the normal temperature water tank is less than the flow rate of its smaller diaphragm pump, the larger diaphragm pump is closed and only the smaller diaphragm pump is controlled to pump water. When the water supply is greater than the flow rate of its larger diaphragm pump, the larger diaphragm pump pumps water at full power, and the difference controls the smaller diaphragm pump to pump water. When the water supply is between the flow rates of the smaller and larger diaphragm pumps, the larger diaphragm pump is controlled to pump water at the flow rate of the smaller diaphragm pump, and the difference controls the smaller diaphragm pump to pump water.

[0006] The diaphragm pump can adjust the flow rate by adjusting its voltage, so the utility model uses multiple diaphragm pumps to extract water of different temperatures in a fixed proportion to obtain water that meets the temperature and flow requirements. In this process, the difficulty is how to accurately control the flow of each diaphragm pump. In the utility model, the water in the same tank is extracted by two diaphragm pumps, and the flow regulation control is mainly undertaken by the smaller diaphragm pump. Since its own rated flow is small, the flow error caused by voltage fluctuations is also small, and the flow of water at different temperatures can be controlled more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the waterway of the utility model.

[0008] Figures 2 to 6 This is the logic block diagram of the control module under different water demand conditions. DETAILED DESCRIPTION

[0009] See attached Figure 1 The water circuit of this embodiment has a raw water inlet end 1. After the raw water is filtered by the pre-filter element 2, it is pressurized by the booster pump 3 and then enters the RO filter element 4 for filtration. The waste water generated by the RO filter element is discharged through the waste water end 5. The generated clean water enters the post-filter element 7 for further filtration, and can also be refluxed to the front of the booster pump 3 through the reflux solenoid valve 6 for secondary RO filtration.

[0010] The water circuit includes a hot tank 8 and a normal temperature water tank 9 connected in parallel, and a post-filter element 7 enters these two water storage devices. Both the hot tank 8 and the normal temperature water tank 9 are equipped with a liquid level sensor and a temperature sensor, wherein the hot tank 8 also has a vent valve to maintain the balance of internal and external pressures. The water outlet of the hot tank 8 has two parallel diaphragm pumps 10 and 11, and the water outlet of the normal temperature water tank 9 has two parallel diaphragm pumps 12 and 13, wherein the flow rate of the diaphragm pumps 10 and 12 is 2.5L / min, and the flow rate of the diaphragm pumps 11 and 13 is 1.5L / min, that is, the hot tank 8 and the normal temperature water tank 9 each have two diaphragm pumps, one large and one small; the water outlets of the diaphragm pumps 10, 11, 12, and 13 are collected in a water mixing device 14, and the mixed water outlets are provided to the user.

[0011] See also Figures 2 to 6 In each block diagram, T1 is the water temperature of the hot tank 8, T2 is the water temperature of the normal temperature water tank 9, Q1 is the water flow rate of the hot tank 8, Q2 is the water flow rate of the normal temperature water tank 9, Q1 is the flow rate of the diaphragm pump 10, Q1 is the flow rate of the diaphragm pump 11, Q2 is the flow rate of the diaphragm pump 12, Q2 is the flow rate of the diaphragm pump 13, V1 is the voltage applied to the diaphragm pump 10, V1 is the voltage applied to the diaphragm pump 11, V2 is the voltage applied to the diaphragm pump 12, V2 is the voltage applied to the diaphragm pump 13, and the rated voltage of all diaphragm pumps is 24 volts. Each block diagram specifies the control logic of the four diaphragm pumps under different requirements.

Claims

1. A water purifier with adjustable water outlet temperature, comprising a filter element, a hot tank and a normal temperature water tank, wherein the water in the hot tank is kept at a temperature not lower than 90°C, and characterized in that: The water outlet of the hot tank is provided with a first diaphragm pump and a second diaphragm pump, and the water outlet of the normal temperature water tank is provided with a third diaphragm pump and a fourth diaphragm pump, wherein the flow rate of the first diaphragm pump is smaller than that of the second diaphragm pump, and the flow rate of the third diaphragm pump is smaller than that of the fourth diaphragm pump; the flow rates of the above four diaphragm pumps are all controlled by a control module, and the water outlets of the four diaphragm pumps are gathered to a water mixing device for mixing and then discharging water.

2. The water purifier with adjustable water outlet temperature as claimed in claim 1, characterized in that: The hot tank and the normal temperature water tank are both provided with temperature sensors. The control module calculates the proportion of water taken from the hot tank and the normal temperature water tank according to user requirements and real-time temperature data of the temperature sensor. When the water supply of the hot tank or the normal temperature water tank is less than the flow rate of its smaller diaphragm pump, the larger diaphragm pump is closed and only the smaller diaphragm pump is controlled to pump water. When the water supply is greater than the flow rate of its larger diaphragm pump, the larger diaphragm pump pumps water at full power, and the difference controls the smaller diaphragm pump to pump water. When the water supply is between the flow rates of the smaller and larger diaphragm pumps, the larger diaphragm pump is controlled to pump water at the flow rate of the smaller diaphragm pump, and the difference controls the smaller diaphragm pump to pump water.

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