Constant-temperature and constant-pressure induction type warm water supply faucet system

Abstract

The utility model discloses a constant-temperature constant-pressure induction type warm water supply faucet system which comprises a water storage tank, the upper side of the water storage tank is connected with a cold water inlet pipe and a hot water inlet pipe, the lower side of the water storage tank is connected with a water supply main pipe, the end of the water supply main pipe is connected with a water supply branch pipe, and the water supply branch pipe is connected with one or more induction faucets. The water outlet horizontal height of the sensing faucet is lower than the bottom horizontal height of the water storage tank; a temperature sensor is arranged on the lower side in the water storage tank, and a water level sensor is arranged on the upper side in the water storage tank; a cold water electric control valve and a hot water electric control valve are respectively arranged on the cold water inlet pipe and the hot water inlet pipe; the sensing faucet, the temperature sensor, the water level sensor, the cold water electric control valve and the hot water electric control valve are all connected to the controller. The utility model has the characteristics that the water outlet pressure and the water outlet temperature range are constant, the structure is simple, and the improvement cost is low.

Description

Technical Field

[0001] The utility model relates to a warm water supply faucet system, in particular to a constant temperature and constant pressure induction type warm water supply faucet system. Background Art

[0002] In hospitals and many public places, installing and using induction faucets can avoid direct contact with the faucet, effectively reduce the cross-transmission of pathogenic microorganisms such as bacteria and viruses, and improve the health and safety of public spaces; at the same time, it can avoid the occurrence of water flow when people walk, which is conducive to saving water. However, in the actual use of induction faucets, there are the following problems: when the hot water of the induction faucet is supplied by a centralized supply system, and there is a pressure difference between the hot water and the tap water, the check valve in front of the induction faucet is prone to failure due to multiple effects such as scale and pressure difference, causing the tap water and hot water to mix, making the hot and cold water system unable to operate normally and causing energy waste.

[0003] In order to avoid water leakage caused by the dual-pipe water supply of hot and cold water of the above-mentioned induction faucets, only single-pipe induction faucets can be installed. However, single-pipe induction faucets cannot provide a good user experience when in use. For example, if only the tap water pipe is installed, the cold water is too cold in winter; if only the hot water pipe is installed, the water temperature will be too high and cannot be used. As a place for treating patients, hospitals must meet the requirements of hospital infection and improve the user experience of patients and medical staff. In places where induction faucets must be installed, when the pressure difference between hot and cold water is large, a kind of induction faucet that can automatically adjust the water temperature and balance the water pressure is particularly needed.

[0004] To this end, it is our responsibility as a professional water supply and drainage technician as well as a hospital logistics staff member to improve the induction faucet system in hospitals and other places with centralized hot water supply and large pressure difference between cold and hot water, so that the induction faucet can supply warm water without water cross-talk. This is our responsibility, and it is an urgent task for our hospital logistics department. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a constant temperature and constant pressure induction type warm water supply faucet system. The utility model has the characteristics of constant water outlet pressure and water outlet temperature range, simple structure and low transformation cost.

[0006] The technical solution of this utility model:

[0007] A constant temperature and constant pressure induction type warm water supply faucet system comprises a water storage tank, the upper side of the water storage tank is connected with a cold water inlet pipe and a hot water inlet pipe, the lower side is connected with a water supply main pipe, the end of the water supply main pipe is connected with a water supply branch pipe, the water supply branch pipe is connected with one or more induction faucets, and the water outlet level of the induction faucet is lower than the bottom level of the water storage tank;

[0008] A temperature sensor is provided on the lower side of the water storage tank, and a water level sensor is provided on the upper side;

[0009] The cold water inlet pipe and the hot water inlet pipe are respectively provided with a cold water electric control valve and a hot water electric control valve;

[0010] The induction faucet, temperature sensor, water level sensor, cold water electric control valve and hot water electric control valve are all connected to the controller.

[0011] This solution sets up a water tank in which hot and cold water are pre-mixed. Therefore, the induction faucet can adopt a single-tube water inlet mode, and the water outlet temperature and pressure can remain stable within a certain range, avoiding water cross-talk due to pressure difference when hot and cold water are supplied by dual pipes, achieving warm water supply for the induction faucet, improving the user experience of the induction faucet, and having the advantages of stable water outlet pressure and temperature within a certain range. In addition, the water supply system of this solution can be completed by simple modification on the traditional induction faucet water supply system, with a simple structure and low modification cost.

[0012] Preferably, in the aforementioned constant temperature and constant pressure induction type warm water supply faucet system, the lower side of the water storage tank is also connected to a return pipe, and the return pipe is provided with a return electric control valve and a return pump.

[0013] This solution sets a return pipe. When the warm water in the water storage tank has not been used for a long time and the temperature drops below the set temperature, the water can be forced back through the return pipe to ensure that the water temperature in the water storage tank is within the set range, further ensuring the stability of the outlet water temperature. During low-peak water consumption periods, such as at night, the forced return pump is turned off and the return water is stopped to reduce energy consumption and save energy resources.

[0014] Preferably, in the aforementioned constant temperature and constant pressure induction hot water supply faucet system, a pressure balance port is provided on the top of the water storage tank. Further preferably, a one-way air inlet valve is provided inside the pressure balance port.

[0015] This solution ensures the air pressure balance inside and outside the water tank during forced water return by setting a pressure balance port and a one-way air inlet valve in the water tank. At the same time, it can slow down the speed at which the warm water in the water tank dissipates heat through the pressure balance port, thereby improving the thermal insulation effect.

[0016] Preferably, in the aforementioned constant temperature and constant pressure induction hot water supply faucet system, the one-way air inlet valve includes an air inlet baffle, one side of the air inlet baffle is connected to the inner side of the pressure balance port via a rotating shaft, and a torsion spring is provided on the rotating shaft.

[0017] The one-way air intake valve of the present invention adopts an air intake baffle and is reset by a torsion spring to realize one-way air intake, and has a simple structure.

[0018] Preferably, in the aforementioned constant temperature and constant pressure induction type hot water supply faucet system, a sealing rubber gasket is provided on the side of the air inlet baffle that contacts the inner wall of the water storage tank.

[0019] This solution improves air tightness by arranging a sealing rubber pad on the air inlet baffle, further slows down the cooling speed of the warm water, and has better thermal insulation performance.

[0020] Preferably, in the aforementioned constant temperature and constant pressure induction hot water supply faucet system, a magnet A is provided at the other end of the air inlet baffle relative to the rotating shaft, and a magnet B cooperating with the magnet A is provided on the inner wall of the water storage tank.

[0021] This solution arranges magnets to make the air intake baffle close to the inner wall of the water storage tank, thereby further improving the air tightness and slowing down the cooling speed of the warm water.

[0022] Preferably, in the aforementioned constant temperature and constant pressure induction type hot water supply faucet system, the water storage tank is an insulated water storage tank.

[0023] This solution directly uses an insulated water tank to improve the thermal insulation performance of the water tank and slow down the cooling speed.

[0024] The utility model provides a water storage tank in which cold and hot water are premixed. Therefore, the induction faucet can adopt a single-tube water inlet mode, and the water outlet temperature and water outlet pressure can be kept stable within a certain range, avoiding the water cross-contamination caused by the pressure difference when the cold and hot water are supplied by two pipes, realizing the warm water supply of the induction faucet, improving the user experience of the induction faucet, and having the advantages of stable water outlet pressure and water outlet temperature within a certain range. In addition, the water supply system of the present scheme can be completed by simple modification on the traditional induction faucet water supply system, with a simple structure and low modification cost.

[0025] The utility model provides a return pipe. When the warm water in the water storage tank is not used for a long time and the temperature drops below the set temperature, the water can be forced to return through the return pipe to ensure that the water temperature in the water storage tank is within the set range, further ensuring the stability of the outlet water temperature. During low water consumption periods, such as at night, the forced return pump is turned off and the return water is stopped to reduce energy consumption and save energy resources.

[0026] The utility model ensures the balance of air pressure inside and outside the water tank during forced water return by arranging a pressure balance port and a one-way air inlet valve in the water tank, and at the same time can slow down the heat dissipation speed of the warm water in the water tank through the pressure balance port, thereby improving the thermal insulation effect. By arranging a sealing rubber pad on the air intake baffle, the air tightness is improved, the cooling speed of the warm water is further slowed down, and the thermal insulation performance is better. By arranging a magnet, the air intake baffle is made to cling to the inner wall of the water tank, which further improves the air tightness and slows down the cooling speed of the warm water. By directly selecting a thermal insulation water tank, the thermal insulation performance of the water tank is improved, and the cooling speed is slower.

[0027] The one-way air intake valve of the utility model adopts an air intake baffle plate and is reset by a torsion spring to realize one-way air intake and has a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Attached Figure 1 It is a structural schematic diagram of the utility model;

[0029] Attached Figure 2 It is a partial schematic diagram of the pressure balance port of the utility model;

[0030] Attached Figure 3 It is a connection diagram of the electric control system of the utility model.

[0031] Explanation of the accompanying drawings: 1-water tank, 2-cold water inlet pipe, 3-hot water inlet pipe, 4-water supply main pipe, 5-water supply branch pipe, 6-induction faucet, 7-temperature sensor, 8-water level sensor, 9-cold water electric control valve, 10-hot water electric control valve, 11-pressure balance port, 12-one-way air intake valve, 13-return pipe, 14-return water electric control valve, 15-return water pump, 121-intake baffle, 122-rotating shaft, 123-torsion spring, 124-sealing rubber pad, 125-magnet A, 126-magnet B. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the embodiments, but is not intended to be a basis for limiting the present invention.

[0033] Embodiments of the present utility model

[0034] A constant temperature and constant pressure induction hot water supply faucet system, as shown in the attached Figure 1-3 As shown, it comprises a water storage tank 1, the upper side of the water storage tank 1 is connected with a cold water inlet pipe 2 and a hot water inlet pipe 3, the lower side is connected with a water supply main pipe 4, the end of the water supply main pipe 4 is connected with a water supply branch pipe 5, the water supply branch pipe 5 is connected with one or more induction faucets 6, and the water outlet level of the induction faucet 6 is lower than the bottom level of the water storage tank 1;

[0035] A temperature sensor 7 is provided on the lower side of the water storage tank 1, and a water level sensor 8 is provided on the upper side;

[0036] The cold water inlet pipe 2 and the hot water inlet pipe 3 are respectively provided with a cold water electric control valve 9 and a hot water electric control valve 10;

[0037] The induction faucet 6, the temperature sensor 7, the water level sensor 8, the cold water electric control valve 9 and the hot water electric control valve 10 are all connected to the controller.

[0038] In the specific implementation of this embodiment, the entire system can be reconstructed according to the construction design drawings, or the existing induction faucet system can be modified by installing corresponding electric control valves and water storage tanks on the original water supply pipeline.

[0039] Its working principle is: at the initial stage of water use, the water supply temperature is set in the controller, the temperature of the mixed water flowing into the water tank 1 is sensed by the temperature sensor 7, and the amount of hot and cold water is adjusted by the opening and closing size of the cold water electric control valve 9 and the hot water electric control valve 10, so that the water temperature in the water tank 1 is within a certain set range, and the water level sensor 8 limits the height of the water level, so that the water level in the water tank 1 is maintained below the set water level.

[0040] When the induction faucet 6 receives the induction signal, water flows out and warm water flows out of the water tank 1. When the temperature sensor 7 senses that the water temperature is lower than the lowest value in the set temperature range, the cold water electric control valve 9 is closed and only the hot water electric control valve 10 is opened to replenish hot water into the water tank 1. When the water temperature in the water tank 1 is within the set temperature range, the opening and closing sizes of the cold water electric control valve 9 and the hot water electric control valve 10 can be controlled respectively according to the aforementioned control method to replenish cold and hot water into the water tank 1.

[0041] Further implementation examples include Figure 1-3 As shown, a return pipe 13 is also connected to the lower side of the water storage tank 1 , and a return electric control valve 14 and a return pump 15 are provided on the return pipe 13 .

[0042] When the temperature sensor 7 senses that the water temperature is lower than the lowest value of the set temperature range, and the induction faucet 6 still has no water flowing out, the controller controls the return water electric control valve 14 and the return water pump 15 to start, and the low-temperature water in the water storage tank 1 flows back to the return water pipe of the centralized hot water supply system. At the same time, the working process of the cold water electric control valve 9 and the hot water electric control valve 10 at this time is consistent with the working principle of the induction faucet 6 in the aforementioned embodiment, that is, only the hot water electric control valve 10 is opened at the beginning, and when the temperature reaches the set temperature range, the two start at the same time to adjust the water temperature in the water storage tank 1.

[0043] Further implementation examples include Figure 1-3 As shown, a pressure balance port 11 is provided on the top of the water storage tank 1. The pressure balance port 11 is used to balance the pressure difference between the inside and outside of the water storage tank 1, especially when forced water return, when the speed of discharging water is faster than the speed of inlet water, the external gas enters the water storage tank 1 from the pressure balance port 11.

[0044] Further implementation examples include Figure 1-3As shown, a one-way air intake valve 12 is provided inside the pressure balance port 11. The one-way air intake valve 12 is a forced one-way air intake valve, that is, when the pressure inside the water storage tank 1 decreases, the one-way air intake valve 12 opens, and the external gas enters the water storage tank 1. When the pressure inside and outside the water storage tank 1 reaches equilibrium or the pressure inside the water storage tank 1 is greater than the external air pressure because the water temperature inside the water storage tank 1 is higher than the external air temperature, the one-way air intake valve 12 cannot discharge the gas in the water storage tank 1.

[0045] Further implementation examples include Figure 1-3 As shown, the one-way air intake valve 12 includes an air intake baffle 121, one side of which is connected to the inner side of the pressure balance port 11 via a rotating shaft 122, and a torsion spring 123 is provided on the rotating shaft 122. The area of ​​the air intake baffle 121 is larger than the area of ​​the pressure balance port 11, so that it can completely cover the pressure balance port 11, and under the action of the torsion spring 123, the air intake baffle 121 can always remain closed to the inner wall of the water storage tank 1, and when the internal pressure becomes smaller, the air intake baffle 121 can be forced to open under the action of the external air pressure, and then reset under the action of the torsion spring 123.

[0046] Further implementation examples include Figure 1-3 As shown, a sealing rubber pad 124 is provided on the side of the air intake baffle 121 that contacts the inner wall of the water storage tank 1. The sealing rubber pad 124 can be made of silicone or rubber.

[0047] Further implementation examples include Figure 1-3 As shown, a magnet A125 is provided at the other end of the air intake baffle 121 relative to the rotating shaft 122, and a magnet B126 cooperating with the magnet A125 is provided on the inner wall of the water storage tank 1. The magnetic poles of the magnet A125 and the magnet B126 are opposite, so that they can maintain attraction.

[0048] Further implementation examples include Figure 1-3 As shown, the water storage tank 1 is a heat preservation water storage tank. The heat preservation water storage tank can be a conventional water storage tank with good heat preservation performance.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and the utility model of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A constant temperature and constant pressure induction hot water supply faucet system, characterized in that: The invention comprises a water storage tank (1), wherein the upper side of the water storage tank (1) is connected to a cold water inlet pipe (2) and a hot water inlet pipe (3), and the lower side is connected to a water supply main pipe (4), the end of the water supply main pipe (4) is connected to a water supply branch pipe (5), and the water supply branch pipe (5) is connected to one or more induction faucets (6), and the water outlet level of the induction faucets (6) is lower than the bottom level of the water storage tank (1); The water storage tank (1) is provided with a temperature sensor (7) on the lower side thereof and a water level sensor (8) on the upper side thereof; The cold water inlet pipe (2) and the hot water inlet pipe (3) are provided with a cold water electric control valve (9) and a hot water electric control valve (10) respectively; The induction faucet (6), the temperature sensor (7), the water level sensor (8), the cold water electric control valve (9) and the hot water electric control valve (10) are all connected to the controller.

2. The constant temperature and constant pressure induction hot water supply faucet system according to claim 1 is characterized by: The lower side of the water storage tank (1) is also connected to a water return pipe (13), and the water return pipe (13) is provided with a water return electric control valve (14) and a water return pump (15).

3. The constant temperature and constant pressure induction hot water supply faucet system according to claim 2 is characterized by: The top of the water storage tank (1) is provided with a pressure balancing port (11).

4. The constant temperature and constant pressure induction hot water supply faucet system according to claim 3 is characterized by: A one-way air intake valve (12) is provided inside the pressure balance port (11).

5. The constant temperature and constant pressure induction hot water supply faucet system according to claim 4 is characterized by: The one-way air intake valve (12) comprises an air intake baffle (121), one side of the air intake baffle (121) is connected to the inner side of the pressure balance port (11) via a rotating shaft (122), and a torsion spring (123) is provided on the rotating shaft (122).

6. The constant temperature and constant pressure induction hot water supply faucet system according to claim 5, characterized in that: A sealing rubber pad (124) is provided on the side of the air intake baffle (121) that contacts the inner wall of the water storage tank (1).

7. The constant temperature and constant pressure induction hot water supply faucet system according to claim 5, characterized in that: A magnet A (125) is provided at the other end of the air intake baffle (121) opposite to the rotating shaft (122), and a magnet B (126) cooperating with the magnet A (125) is provided on the inner wall of the water storage tank (1).

8. The constant temperature and constant pressure induction hot water supply faucet system according to claim 1, characterized in that: The water storage tank (1) is a heat-insulating water storage tank.

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