A domestic instant on-demand constant temperature water heating device

Abstract

The application relates to a domestic instant constant-temperature hot water supply device, belonging to the technical field of domestic constant-temperature hot water supply. A small-power water storage type electric water heater, a four-way valve, a normally-open electromagnetic valve, a one-way safety valve, a self-acting constant-temperature mixing valve, a flow switch and a control circuit are arranged between a hand-washing faucet and a shower faucet at one end of a hot water pipe in a bathroom, thereby forming a first constant-temperature hot water supply pipeline system and a second constant-temperature hot water supply pipeline system, and the two systems supply instant constant-temperature hot water to the hand-washing faucet and the shower faucet respectively. The domestic instant constant-temperature hot water supply device can supply instant constant-temperature hot water to the hand-washing faucet and the shower faucet in the bathroom by arranging the small-power water storage type electric water heater and the constant-temperature mixing valve in the bathroom and a gas water heater on a living balcony, and water resources can be saved.

Description

Technical Field

[0001] This utility model relates to the field of household constant temperature hot water technology, and in particular to a household instant hot water constant temperature hot water device. Background Technology

[0002] Currently, the typical residential interior layout features a kitchen and utility balcony on one side, 2-4 bedrooms and 1-2 bathrooms on the other, separated by a living room and dining room in the middle. Most domestic hot water systems use 10-16 liter gas water heaters, which are advantageous due to their small size and fast heating. However, incomplete combustion during operation often produces large amounts of harmful carbon monoxide, posing a health risk. Therefore, most gas water heaters are installed on the utility balcony adjacent to the kitchen, allowing for direct venting of exhaust gases into the outdoor atmosphere via a metal gas pipe equipped with a one-way valve. A domestic constant-temperature hot water device is now available, such as... Figure 1 As shown, because the hot water pipe 2 between the gas water heater 1 installed on the balcony and the handwashing faucet 4 or shower faucet 3 in the bathroom is several meters long, approximately 15 to 20 liters of cold water stored in the hot water pipe 2 needs to be drained after turning on the handwashing faucet 4 or shower faucet 3 to obtain constant-temperature hot water. Therefore, this type of household constant-temperature hot water device has the following disadvantages: ① wastes water resources; ② cannot provide instant, constant-temperature hot water. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a household instant hot water supply device. By installing a low-power storage electric water heater and a thermostatic mixing valve in the bathroom, and cooperating with a gas water heater installed on the balcony, it can provide instant hot water to the handwashing faucets and shower faucets in the bathroom, while also saving water resources.

[0004] The technical solution proposed by this utility model is as follows: a household instant hot water supply device includes a gas water heater located at a remote end, a handwashing faucet and a shower faucet located in the bathroom, and a hot water pipe connecting the hot water outlet of the gas water heater to the handwashing faucet and the shower faucet. A small-power storage-type electric water heater, a four-way pipe, a normally open solenoid valve, a one-way safety valve, a self-regulating thermostatic mixing valve, a flow switch, and a control circuit are also provided between the end of the hot water pipe located in the bathroom and the handwashing faucet and the shower faucet, forming a first and a second constant-temperature hot water supply pipeline system, respectively supplying instant hot water to the shower faucet and the handwashing faucet.

[0005] The first constant temperature hot water pipeline system mainly includes a hot water pipe, a one-way safety valve, a normally open solenoid valve, a four-way pipe, a small-power storage electric water heater, a self-regulating constant temperature mixing valve, a flow switch, and a shower faucet. One end of the normally open solenoid valve is connected to the tap water pipe, and the other end is connected to the first port of the four-way pipe. The constant temperature hot water outlet of the gas water heater is connected to one port of the hot water pipe, and the other port of the hot water pipe is connected to the second port of the four-way pipe through the one-way safety valve. The first inlet and first outlet of the small-power storage electric water heater are respectively connected to the fourth port of the four-way pipe and the hot water inlet of the self-regulating constant temperature mixing valve. The third port of the four-way pipe is connected to the cold water inlet of the self-regulating constant temperature mixing valve. The first mixed water outlet of the self-regulating constant temperature mixing valve is connected to the shower faucet through the flow switch.

[0006] The second constant temperature hot water pipeline system mainly includes a normally open solenoid valve, a four-way pipe, a small-power storage electric water heater, a self-regulating constant temperature mixing valve, and a handwashing faucet. One end of the normally open solenoid valve is connected to the tap water pipe, and the other end is connected to the first port of the four-way pipe. The third and fourth ports of the four-way pipe are respectively connected to the cold water inlet of the self-regulating constant temperature mixing valve and the first water inlet of the small-power storage electric water heater. The first water outlet of the small-power storage electric water heater is connected to the hot water inlet of the self-regulating constant temperature mixing valve, and the second mixed water outlet of the self-regulating constant temperature mixing valve is connected to the handwashing faucet.

[0007] The control circuit is electrically connected to the normally open solenoid valve and the flow switch.

[0008] Compared with the prior art, the present invention has the following beneficial effects: Since most households install a 10-16 liter gas water heater on the balcony outside the kitchen, which facilitates the rapid emission of harmful carbon monoxide and provides convenient hot water for the kitchen, the hot water pipe between the gas water heater's outlet and the bathroom faucet, located far from the balcony, is several meters long. If the gas water heater stops operating for even a short period, the stored hot water in the pipe turns cold. Therefore, each time the shower faucet is turned on, several liters of cold water need to be drained before a constant-temperature hot water is available. To address this, this invention installs a low-power storage-type electric water heater and a self-regulating thermostatic mixing valve in the bathroom, forming a first and second constant-temperature hot water supply system. When the shower faucet is turned on, the cold water in the hot water pipe mixes with the constant-temperature hot water in the low-power storage electric water heater, and the constant-temperature hot water flows out of the shower faucet immediately. At the same time, the gas water heater starts working, and the constant-temperature hot water output flows directly to the shower faucet following the cold water in the hot water pipe, resulting in a large amount of continuous, instant, constant-temperature hot water.

[0009] Since handwashing faucets only require a short time and a small amount of hot water, a low-power storage-type electric water heater can provide instant, constant-temperature hot water without needing to activate the gas water heater. Therefore, this invention not only achieves the goal of providing instant hot water for shower and handwashing faucets but also has the beneficial effect of saving water and energy. Attached Figure Description

[0010] Figure 1 This is a structural diagram of an existing household constant temperature hot water supply device.

[0011] Figure 2 This is a block diagram illustrating the structure of a household instant hot water supply device according to this utility model.

[0012] Figure 3 yes Figure 2 The diagram shows the structure of a constant temperature hot water supply device.

[0013] The following are the labels in the diagram: 1. Gas water heater; 2. Hot water pipe; 3. Shower faucet; 4. Handwashing faucet; 5. Small-power storage-type electric water heater; 5-1. First water inlet; 5-2. First water outlet; 6. Self-regulating thermostatic mixing valve; 6-1. Cold water inlet; 6-2. Hot water inlet; 6-3. First mixed water outlet; 6-4. Second mixed water outlet; 7. Flow switch; 8. Normally open solenoid valve; 9. Four-way pipe; 9-1. First pipe port; 9-2. Second pipe port; 9-3. Third pipe port; 9-4. Fourth pipe port; 10. One-way safety valve; 11. Control circuit; 12. Tap water pipe. Detailed Implementation

[0014] The present invention will be further described in detail through the following embodiments.

[0015] See Figures 2-3 As shown, a household instant hot water supply system includes a gas water heater 1 located at a remote end, a handwashing faucet 4 and a shower faucet 3 located in the bathroom, and a hot water pipe 2 connecting the hot water outlet of the gas water heater 1 to the handwashing faucet 4 and the shower faucet 3. Between the end of the hot water pipe 2 located in the bathroom and the handwashing faucet 4 and the shower faucet 3, a low-power storage-type electric water heater 5, a four-way pipe 9, a normally open solenoid valve 8, a one-way safety valve 10, a self-regulating thermostatic mixing valve 6, a flow switch 7, and a control circuit 11 are also provided, forming a first and a second thermostatic hot water supply system, respectively supplying instant hot water to the shower faucet 3 and the handwashing faucet 4.

[0016] The first constant-temperature hot water pipeline system mainly includes a hot water pipe 2, a one-way safety valve 10, a normally open solenoid valve 8, a four-way pipe 9, a low-power storage electric water heater 5, a self-regulating constant-temperature mixing valve 6, a flow switch 7, and a shower faucet 3. One end of the normally open solenoid valve 8 is connected to the tap water pipe 12, and the other end is connected to the first port 9-1 of the four-way pipe 9. The constant-temperature hot water outlet of the gas water heater 1 is connected to one end of the hot water pipe 2, and the other end of the hot water pipe 2 is connected to the one-way safety valve. 10 is connected to the second port 9-2 of the four-way pipe 2. The first inlet 5-1 and the first outlet 5-2 of the low-power storage electric water heater 5 are respectively connected to the fourth port 9-4 of the four-way pipe 9 and the hot water inlet 6-2 of the self-regulating thermostatic mixing valve 6. The third port 9-3 of the four-way pipe 9 is connected to the cold water inlet 6-1 of the self-regulating thermostatic mixing valve 6. The first mixed water outlet 6-3 of the self-regulating thermostatic mixing valve 6 is connected to the shower faucet 3 through the flow switch 7.

[0017] The second constant temperature hot water pipeline system mainly includes a normally open solenoid valve 8, a four-way pipe 9, a small-power storage electric water heater 5, a self-regulating constant temperature mixing valve 6, and a handwashing faucet 4. One end of the normally open solenoid valve 8 is connected to the tap water pipe 12, and the other end is connected to the first port 9-1 of the four-way pipe 9. The third port 9-3 and the fourth port 9-4 of the four-way pipe 9 are respectively connected to the cold water inlet 6-1 of the self-regulating constant temperature mixing valve 6 and the first water inlet 5-1 of the small-power storage electric water heater 5. The first water outlet 5-2 of the small-power storage electric water heater 5 is connected to the hot water inlet 6-2 of the self-regulating constant temperature mixing valve 6. The second mixed water outlet 6-4 of the self-regulating constant temperature mixing valve 6 is connected to the handwashing faucet 4.

[0018] The control circuit 11 is electrically connected to the normally open solenoid valve 8 and the flow switch 7.

[0019] In this embodiment, the low-power storage-type electric water heater 5 is an 8-12 liter storage-type electric water heater. The gas water heater 1 is a 10-16 liter gas water heater. The self-regulating thermostatic mixing valve 6 is model ML-400. The flow switch 7 is model SK-4040-CL. The normally open solenoid valve 8 is model FPD-0A010.

[0020] The working principle and process of our household instant hot water supply system are as follows: The low-power storage-type electric water heater 5 is connected to the power supply and remains in operation, with its water tank containing constant-temperature hot water for a long time.

[0021] When the handwashing faucet 4 is turned on, tap water enters the four-way pipe 9 through the normally open solenoid valve 8 and is then divided into two paths. One path enters the self-regulating thermostatic mixing valve 6 through the cold water inlet 6-1, and the other path enters the small-power storage electric water heater 5 through the first inlet 5-1. The hot water in the small-power storage electric water heater 5 enters the self-regulating thermostatic mixing valve 6 through the first outlet 5-2 and the hot water inlet 6-2. The self-regulating thermostatic mixing valve 6 automatically adjusts the mixing ratio of the incoming cold and hot water according to the preset outlet temperature, keeping the outlet temperature of the mixed water constant at the preset temperature. This mixed water flows to the handwashing faucet 4 through the second mixed water outlet 6-4. In daily life, the handwashing faucet 4 is usually used for short periods of time with small amounts of hot water, and the hot water provided by the small-power storage electric water heater 5 is sufficient to meet the needs, while the gas water heater 1 at the far end does not need to be turned on.

[0022] When the shower faucet 3 is turned on, the flow switch 7 connected to it generates a closing signal due to water flow, which energizes the control circuit 11 to the normally open solenoid valve 8. The normally open solenoid valve 8 closes, and under the action of water pressure, the one-way safety valve 10 opens. Water in the hot water pipe 2 enters the four-way pipe 9 through the one-way safety valve 10. The flow of water in the hot water pipe 2 will start the gas water heater 1. Initially, the water in the hot water pipe 2 is cold water. After entering the four-way pipe 9, it splits into two paths. One path enters through the cold water inlet 6-1 of the self-regulating thermostatic mixing valve 6. The self-regulating thermostatic mixing valve 6 has another path that enters the low-power storage electric water heater 5 through the first inlet 5-1. The thermostatic hot water in the low-power storage electric water heater 5 enters the self-regulating thermostatic mixing valve 6 through the first outlet 5-2 and the hot water inlet 6-2 of the self-regulating thermostatic mixing valve 6. The self-regulating thermostatic mixing valve 6 automatically adjusts the mixing ratio of cold water and hot water according to the preset outlet temperature, so that the outlet temperature of the mixed water is kept constant at the preset temperature. The mixed water flows out from the first mixed water outlet 6-3 and flows through the flow switch 7 to the shower faucet 3. When the cold water in hot water pipe 2 is used up, the constant-temperature hot water from the gas water heater 1 enters the four-way pipe 9. At this time, the self-regulating thermostatic mixing valve 6 closes its hot water inlet 6-2. The constant-temperature hot water flows in through the third port 9-3 of the four-way pipe 9 and the cold water inlet 6-1 of the self-regulating thermostatic mixing valve 6, and flows out directly from the first mixed water outlet 6-3, passing through the flow switch 7 and entering the shower faucet 3. In daily life, the shower faucet 3 uses a large amount of constant-temperature hot water for a long time, so the gas water heater 1 is needed. The small-power storage electric water heater 5 in the bathroom is only used to replace the cold water stored in the hot water pipe 2, so that constant-temperature hot water is available as soon as the shower faucet 3 is turned on.

Claims

1. A household instant hot water supply device, comprising a gas water heater (1) located at a remote end, a handwashing faucet (4) and a shower faucet (3) located in the bathroom, and a hot water pipe (2) connecting the hot water outlet of the gas water heater (1) to the handwashing faucet (4) and the shower faucet (3), characterized in that: Between the end of the hot water pipe (2) located in the bathroom and the handwashing faucet (4) and the shower faucet (3), a small-power storage electric water heater (5), a four-way pipe (9), a normally open solenoid valve (8), a one-way safety valve (10), a self-regulating thermostatic mixing valve (6), a flow switch (7), and a control circuit (11) are also provided, forming a first thermostatic hot water supply pipeline system and a second thermostatic hot water supply pipeline system, which respectively supply instant thermostatic hot water to the shower faucet (3) and the handwashing faucet (4); the first thermostatic hot water supply pipeline system includes a hot water pipe (2), a one-way safety valve (10), a normally open solenoid valve (8), a four-way pipe (9), a four-way pipe (9), a four-way pipe (10), a four-way valve (10), a four-way mixing ... The system includes a small-power storage electric water heater (5), a self-regulating thermostatic mixing valve (6), a flow switch (7), and a shower faucet (3). One end of the normally open solenoid valve (8) is connected to the tap water pipe (12), and the other end is connected to the first port (9-1) of the four-way pipe (9). The thermostatic hot water outlet of the gas water heater (1) is connected to one port of the hot water pipe (2), and the other port of the hot water pipe (2) is connected to the second port (9-2) of the four-way pipe (9) through the one-way safety valve (10). The first inlet (5-1) and the first outlet (5-2) of the small-power storage electric water heater (5) are respectively connected to the... The fourth port (9-4) of the four-way pipe (9) is connected to the hot water inlet (6-2) of the self-regulating thermostatic mixing valve (6), the third port (9-3) of the four-way pipe (9) is connected to the cold water inlet (6-1) of the self-regulating thermostatic mixing valve (6), and the first mixing water outlet (6-3) of the self-regulating thermostatic mixing valve (6) is connected to the shower faucet (3) through the flow switch (7); the second thermostatic hot water supply pipeline system includes a normally open solenoid valve (8), a four-way pipe (9), a small-power storage electric water heater (5), a self-regulating thermostatic mixing valve (6), and a handwashing faucet (4), one end of the normally open solenoid valve (8) The outlet is connected to the tap water pipe (12), and the other end of the outlet is connected to the first port (9-1) of the four-way pipe (9). The third port (9-3) and the fourth port (9-4) of the four-way pipe (9) are respectively connected to the cold water inlet (6-1) of the self-regulating thermostatic mixing valve (6) and the first water inlet (5-1) of the low-power storage electric water heater (5). The first water outlet (5-2) of the low-power storage electric water heater (5) is connected to the hot water inlet (6-2) of the self-regulating thermostatic mixing valve (6). The second mixed water outlet (6-4) of the self-regulating thermostatic mixing valve (6) is connected to the handwashing faucet (4).

2. The household instant hot water supply device according to claim 1, characterized in that: The control circuit (11) is electrically connected to the normally open solenoid valve (8) and the flow switch (7).

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