JP2001165457A - Automatic mixing faucet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dissolve a problem that, when a flow rate is changed due to a water pressure of a water source, a high error occurs to measurement of water quantity and unevenness in an amount of hot water high which a bath tub is filled occurs. SOLUTION: This automatic mixing faucet comprises a motor-driven stop valve 2 on the hot water side situated in a flow passage A on the hot water side to supply hot water and stop supply of hot water; a motor-driven stop valve 3 on the water side situated on a flow passage B on the water side to supply water and stop supply of water; and electric type flow meter 6 situated on a confluent passage C, where the flow passage A on the hot water side and the flow passage B on the water side are confluent with each other and measuring a flow rate of mixing hot water of hot water in the flow passage A on the hot water side and water in the flow passage B on the water side; and a control part 8 to stop supply of mixing hot water by closing the stop valve 2 on the hot water side and the stop valve 3 on the water side alone or simultaneously based on the measuring result of an instrumentation gauge 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic mixing faucet for automatically discharging hot water of a set hot water temperature and amount to a bathtub in a bathroom, a sink in a kitchen, a wash basin in a washroom, and the like.

[0002]

2. Description of the Related Art FIG. 5 shows the overall structure of a conventional automatic mixing faucet 100. In the figure, an automatic mixing faucet 100 includes check valves 101 provided in a hot water side flow path A for supplying hot water to a bathtub and a water side flow path B for supplying water to a bathtub, respectively. A and a mixing valve 10 provided at a position where the water-side flow path B merges.
2, a mechanical stopcock 103 provided in a merging channel C where the hot water side channel A and the waterside channel B merge, and a machine provided downstream of the mechanical water stopcock 103 in the merging channel C. Flow meter 10
4 is provided.

Next, the operation of the conventional automatic mixing faucet 100 will be described. First, when the mechanical stopcock 103 is opened,
The hot water in the hot water side flow path A and the water in the water side flow path B pass through the check valve 101 and are mixed at the hot water temperature set by the mixing valve 102. The mixed water mixed by the mixing valve 102 passes through the merging channel C, and the amount of hot water is measured by the mechanical flow meter 104 via the mechanical stopcock 103. Then, the mixed water that has passed through the mechanical flow meter 104 is supplied to the bathtub, and the bathtub is filled with hot water.

FIG. 6 is a sectional view showing a detailed structure of a mechanical stopcock 103 and a mechanical flowmeter 104. As shown in the figure, an impeller 105 is provided in the mechanical flow meter 104, and the impeller 105 is rotated by the hot water flowing in the merging flow path C passing through the impeller 105. The mechanical stopcock 103 has an opening / closing cam 1 on which the amount of hot water is displayed on a scale.
The rotational force from the impeller 105 is applied to the opening / closing cam 106 via the gear 107. And
By rotating the opening / closing cam 106, the amount of hot water that can pass through the mechanical stopcock 103 is set.

When the impeller 105 rotates, the rotational force is reduced by a gear 107 and applied to an opening / closing cam 106.
As a result, the opening / closing cam 106 rotates slowly. When the impeller 105 reaches the set number of revolutions, the opening / closing cam 106 of the mechanical flow meter 104 operates the mechanical stopcock 103 using the rotational force of the impeller 105. By closing the mechanical water stopcock 103 by this operation, a constant hot water temperature can be obtained with a constant hot water quantity.

[0006]

The conventional automatic mixing faucet 100 is provided with an impeller 105 of a mechanical flow meter 104.
Is rotated, and the stopcock is operated using the rotational force of the impeller 105. For this reason, the impeller 105 needs a water pressure to perform a certain operation, and when the flow rate such as the water pressure of the water source changes, a large error occurs in the measurement of the water amount, and the amount of the hot water applied to the bathtub varies. Met.

In the conventional automatic mixing faucet 100, the rotational force of the impeller 105 of the mechanical flow meter 104 is transmitted by many gears 107 to measure the flow rate. Since a large number of gears 107 are used, the structure is complicated, and dirt in hot water or water, rust or scale in the pipe is reduced by the first gear.
07, the gear 107 cannot rotate. As a result, the amount of hot water in the bathtub cannot be measured by the mechanical flow meter 104,
Hot water continued to be supplied, causing a situation where hot water overflowed from the bathtub.

Further, in the conventional automatic mixing faucet 100,
When performing high-temperature hot water or cutting water to change the temperature of the bathtub, change the temperature setting, open the water stopcock, pour water into the bathtub, look at a suitable time, stop the water stopcock. It was very troublesome because it required a series of tasks. The automatic mixing faucet of the present invention has been made in order to solve the above-described problems, and has a small number of failures and malfunctions by a simple operation, and can accurately spread a stable amount of hot water to a bathtub. The purpose is to provide.

[0009]

An automatic mixer tap according to claim 1 is provided in a hot water side flow path for supplying hot water, and supplies an electric hot water side stopcock for stopping the supply of hot water and water. An electric water stop cock provided in the water flow path and stopping the supply of water, and a water stop water stopper provided in a merge flow path where the hot water flow path and the water flow path merge. An electric flowmeter that measures the flow rate of mixed hot water with water in the water-side flow path, and based on the measurement results of the flowmeter, closes the hot-water stopcock and the water-side stopcock individually or simultaneously. And a control unit for stopping the supply of the mixed hot water.

According to a second aspect of the present invention, the water-side water stopcock and the hot-water-side water stopcock are provided with a pulse-driven solenoid valve.

In a third mode, the first mode in which hot water at a set temperature is discharged by opening the hot water stopcock and the water side water stopcock respectively for a predetermined time, and only the hot water stopcock is opened. Thus, a second mode in which hot water is discharged is provided, and a third mode in which water is discharged by opening only the water stop cock is provided.

According to a fourth aspect of the present invention, the mixing valve is provided at a position where the hot water side flow path and the water side flow path join, and the hot water side water stopcock and the water side water stopcock are respectively provided between the mixing valve. And a check valve.

According to a fifth aspect of the present invention, the apparatus further comprises a hot water temperature detector provided in the merging flow path and detecting a temperature of the mixed hot water flowing through the merging flow path.

According to a sixth aspect of the present invention, the flow meter includes a spiral impeller, and the components are arranged in the order of the hot water side and the water side stopcock, the mixing valve, the flow meter, and the hot water temperature detector from the upstream side. It is characterized by.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of an automatic mixing faucet according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a block diagram showing a configuration of an automatic mixing faucet 1 according to the present embodiment. As shown in the figure, the automatic mixing faucet 1 is provided in the hot water flow path A for supplying hot water to the bathtub,
A motor-operated water stopcock (water-side water stopcock) 2 for stopping the supply of hot water, and an electric motor-operated water stopcock (water-side stopcock) provided in the water-side flow path B for supplying water to the bathtub and stopping the supply of water A water stopcock) 3, a check valve 4 provided in each of the hot water side flow path A and the water side flow path B, and a mixing provided in a joining position of the hot water side flow path A and the water side flow path B. And a valve 5.

The automatic mixing faucet 1 is provided in a merging channel C where the hot water side channel A and the water side channel B are merged, and an electric flow meter 6 for measuring the amount of hot water flowing through the merging channel C. The electric water stopcocks 2 and 3 are operated based on the measurement results of the hot water temperature detector 7 provided for safety in the merged flow path C downstream of the electric flowmeter 6 and the electric flowmeter 6. And a control unit 8 that performs the control. Here, the electric flow meter 6 rotates the impeller with the flow of hot water, and measures the rotation by replacing the rotation with an electric signal.
The electric stopcocks 2 and 3 open and close using a pulse-driven electromagnetic valve. For this reason, since less electricity is used, it is possible to drive a dry battery.

FIG. 2 shows an operation / display unit 9 provided in the control unit 8.
It is a figure which shows the detail of. In the figure, 10 is a display unit,
11 is a hot water switch, 12 is a hot water switch, 1
3 is a hot water switch, 14 is a water switch, 15 is a display changeover switch, and 16 is a setting switch. And
By operating each switch of the operation / display unit 9, it is possible to fill the bathtub, add hot water, and insert water.

Next, the automatic mixing faucet 1 according to this embodiment 1
Will be described. First, when the display changeover switch 15 of the operation / display unit 9 is operated, the display on the display unit 10 is switched for the amount of hot water. When the setting switch 16 is operated in the state of this display, the amount of hot water to be applied to the bathtub is set. Further, when the display changeover switch 15 is operated, the display on the display unit 10 is switched for hot water temperature. When the setting switch 16 is operated in the state of this display, the hot water temperature of the bathtub is set. When the hot water switch 11 is pressed after the hot water amount and the hot water temperature of the bathtub are set, the electric water stopcock 2 of the hot water side flow path A and the electric water stopcock 3 of the water side flow path B are controlled by the control unit 8. Opened at the same time.

When the electric stopcocks 2 and 3 are opened, the hot water in the hot water side passage A and the water in the water side passage B pass through the electric stopcocks 2 and 3 and the check valve 4 and are mixed. Mixing is performed at the hot water temperature set by the valve 5. The mixed hot water mixed by the mixing valve 5 passes through the combined flow path C,
The flow rate of the mixed hot water is measured by the electric flow meter 6, and the hot water temperature of the mixed hot water is measured by the hot water temperature detector 7. Electric flow meter
The measurement result in 6 is given to the control unit 8, and the total amount of the mixed hot water is accumulated in the control unit 8. Then, when the control unit 8 determines that the mixed hot water has reached the set hot water amount, the control unit 8 simultaneously closes the electric stopcocks 2 and 3 and stops water injection into the bathtub.

The measurement result of the hot water temperature detector 7 is also transmitted to the control unit 8.
And the controller 8 monitors the temperature of the mixed hot water. When the temperature of the mixed hot water deviates from the set hot water temperature, the control unit 8 operates the electric stopcocks 2 and 3 to adjust the temperature of the mixed hot water to the set hot water temperature. Here, if a malfunction occurs in the mixing valve 5 or the like and the temperature of the mixed hot water does not reach the set hot water temperature even by adjusting the electric stopcocks 2 and 3,
The control unit 8 simultaneously closes the electric water stopcocks 2 and 3 to immediately stop water injection into the bathtub.

FIG. 3 is a timing chart showing the application of a voltage to the pulse-driven electric stopcocks 2 and 3 and the opening and closing of the solenoid valves of the electric stopcocks 2 and 3. As shown in the timing chart, when power is applied at the start of operation of the electric stopcocks 2 and 3, the electromagnetic valve opens, and when voltage is applied again at the end of operation of the electric stopcocks 2 and 3, the electromagnetic valve closes.

When it is desired to change the temperature of the hot water in the bathtub, high-temperature hot water or cutting water is automatically supplied. In the case of hot water,
When the high-temperature hot water switch 12 of the display unit 9 is pressed to instruct high-temperature hot water, only the electric water stopcock 2 on the hot water side operates. By this operation, the solenoid valve of the electric stopcock 2 opens,
Only hot water is check valve 4, mixing valve 5, flow meter 6, hot water temperature detector 7
The water is poured into the bathtub.

The setting switch 16 of the operation / display unit 9
When the set hot water temperature of the mixing valve 5 is set to a high temperature such as 60 ° C. by operating the
Works. By this operation, the solenoid valves of the electric stopcocks 2 and 3 are opened and mixed by the mixing valve 5 so that the set hot water temperature is reached. The mixed hot water passes through the electric flow meter 6 and the hot water temperature detector 7. Water is poured into the bathtub. The flow rate of the mixed hot water is measured by the flow meter 6, and when a certain amount of hot water is reached, the electric stopcocks 2 and 3 automatically close the solenoid valves and stop water injection into the bathtub.
For example, if the amount of hot water generally required for high-temperature hot water such as “10 L (liter)” or “20 L” can be set by the setting switch 16, water injection can be stopped with a small amount of hot water such as 10 L or 20 L. it can.

In the case of the insertion water, when the insertion water switch 23 of the operation / display unit 9 is pressed to indicate the insertion water, only the electric water stopcock 3 on the water side operates. By this operation, the solenoid valve of the electric stopcock 3 is opened, and only water is checked by the check valve 4, the mixing valve 5,
Water is poured into the bathtub through the flow meter 6 and the hot water temperature detector 7.

The setting switch 16 of the operation / display unit 9
When the set hot water temperature of the mixing valve 5 is set to a low temperature such as 15 ° C. by operating the
Works. By this operation, the solenoid valves of the electric stopcocks 2 and 3 are opened and mixed by the mixing valve 5 so that the set hot water temperature is reached. The mixed hot water passes through the electric flow meter 6 and the hot water temperature detector 7. Water is poured into the bathtub. The flow rate of the mixed hot water is measured by the flow meter 6, and when a certain amount of hot water is reached, the electric water stopcocks 2 and 3 automatically close the solenoid valves and stop injecting water into the bathtub.

For example, if the required amount of hot water such as "10L" or "20L" can be set by the setting switch 16, the water injection can be stopped with a small amount of water such as 10L or 20L. it can. Furthermore, when the amount of hot water in the bathtub decreases, and you want to increase only the amount of hot water in the bathtub while maintaining the hot water temperature at the set hot water temperature, use the same flow of hot water as the hot water to supply the same amount of hot water as the hot water and the cutting water. The amount of hot water in the bathtub can be increased.

Next, assuming that the components are arranged in order from the upstream side such as the electric stopcocks 2, 3, the mixing valve 5, the flow meter 6, and the hot water temperature detector 7, the mixing valve 5 mixes hot water and water. The temperature of the mixed water becomes uniform. That is, in the pipe immediately after being mixed by the mixing valve 5, the temperature of the mixed hot water varies internally. However, the electric flow meter 6 provided downstream of the mixing valve 5 stirs the mixed hot water. Variations in the temperature of the mixed hot water can be eliminated. By measuring the hot water temperature of the mixed hot water with almost no temperature variation by the hot water temperature detector 7 downstream of the electric flow meter 6, the measurement accuracy of the hot water temperature detector 7 can be improved.

FIG. 4 is a diagram showing details of the impeller of the flow meter 6. As shown in the figure, the flow meter 6 has a spiral impeller 17 for measuring the flow rate of the mixed hot water therein. Then, the spiral impeller 12 is rotated by the action of the mixed hot water flowing in the flow meter 6, and by measuring the number of rotations,
The flow rate of the mixed hot water can be measured. Since the spiral impeller 17 has a spiral shape, turbulence occurs in the flow of the mixed hot water, and the stirring of the hot water and the water is promoted. As a result, the variation in the hot water temperature of the mixed hot water is reduced, and by measuring it with the hot water temperature detector 7, it is possible to obtain hot water having a stable hot water temperature in a short distance. Therefore, a system with high safety can be obtained even if the distance between the flow path of the mixing valve 5 and the hot water temperature detector 7 is shortened.

Conventionally, in a state where the solenoid valves of the electric water stopcocks 2 and 3 are closed, only the electric water stopcocks 2 and 3 on one side are opened and closed with high-temperature hot water or cutting water. When the pressure in the opposite direction is applied to the solenoid valve, the solenoid valves of the closed electric stopcocks 2 and 3 are sometimes opened. Therefore, by arranging the components in order from the upstream side to the electric stopcocks 2, 3, the check valve 4, and the mixing valve 5, the check valve 4 can stop the backflow pressure,
The opening of the solenoid valves of the electric stopcocks 2 and 3 could be prevented.

As described above, according to the automatic mixing faucet according to the present embodiment, it is possible to accurately and stably supply a stable amount of hot water to the bath tub with a simple operation and less failures and malfunctions. It is possible to provide a small-sized automatic mixing faucet that can accurately pour hot water into a bathtub with a stable amount of hot water and can easily perform construction work. In addition,
Although the present embodiment has been described by taking a bathtub as an example, the present invention is not limited to the bathtub, but can be applied to a kitchen sink or a washbasin in a washroom.

[0032]

As described above, the automatic mixing faucet according to the present invention has the following advantages. That is, since an electric hot water stopcock and a water stopcock are provided, in order to drive the hot water stopcock and the like,
There is no need to use the rotational force of the impeller. As a result, a water pressure for applying a rotational force to the impeller becomes unnecessary, and the water amount can be measured with high accuracy even when the flow rate such as the water pressure of the water source changes. Therefore, the amount of hot water applied to the bathtub becomes constant.

Since the electric flow meter is provided, no gear is required for transmitting the rotational force of the impeller.
As a result, the structure is simplified, and there is no problem that dirt in hot water or water, rust or scale in the pipe is caught between gears.

[Brief description of the drawings]

FIG. 1 is a diagram showing an entire configuration of an automatic mixing faucet according to the present embodiment.

FIG. 2 is a detailed diagram showing an operation / display unit of a control unit.

FIG. 3 is a timing chart of an electromagnetic valve of the electric stopcock.

FIG. 4 is a sectional view showing the internal structure of the flow meter.

FIG. 5 is a view showing the entire configuration of a conventional mechanical mixing faucet.

FIG. 6 is a sectional view showing the internal structure of a water stopcock and a flow meter of a conventional mechanical mixing faucet.

[Explanation of symbols]

1: Automatic mixing faucet, 2: Electric water stopcock (hot water stopcock), 3
... Electric water stopcock (water side stopcock), 4 ... Check valve, 5 ... Mixing valve, 6 ... Electrical flow meter (flow meter), 7 ... Hot water temperature detector, 8
... Control unit, 9 ... Operation / display unit, 10 ... Display unit, 11 ... Temperature switch, 12 ... High-temperature hot water switch, 13 ... Additional water switch, 14 ... Sink switch, 15 ... Display changeover switch, 16 ... Setting switch , 17 ... spiral impeller,
A: hot water side channel, B: water side channel, C: merge channel.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazuhiro Saito 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. F-term (reference) 2D060 BB02 CA02 CA04 CA07 3L073 AA01 AA15 AA18 AB16 AC01 AC02 AC03 AC10 AD07 AD08 AE06 AE08

Claims (6)

[Claims] 1. An electric hot water stopcock provided in a hot water side flow path for supplying hot water and stopping the supply of hot water, and provided in a water side flow path for supplying water and stopping the supply of water. An electric water-side stopcock to be provided, provided in a junction where the hot-water-side flow path and the water-side flow path merge, and hot water in the hot-water-side flow path and water in the water-side flow path An electric flow meter for measuring the flow rate of the mixed hot water, and supplying the mixed hot water by closing the hot water stopcock and the water stopcock independently or simultaneously based on the measurement result of the flowmeter. An automatic mixing faucet, comprising: a control unit for stopping the mixing. 2. The automatic mixing faucet according to claim 1, wherein the water-side water stopcock and the hot-water-side water stopcock include a pulse-driven solenoid valve. 3. A first mode in which hot water at a set temperature is discharged by opening the hot-water stopcock and the water-side stopcock respectively for a predetermined time, and only the hot-water stopcock is opened. The method according to claim 1, further comprising a second mode for discharging hot water, and a third mode for discharging water by opening only the water stop cock. 4. Automatic mixing faucet. 4. A mixing valve provided at a position where the hot water side flow path and the water side flow path meet, and a mixing valve between the hot water side water stopcock and the water side water stopcock and the mixing valve, respectively. The automatic mixing faucet according to any one of claims 1 to 3, further comprising a check valve provided. 5. The automatic mixing faucet according to claim 4, further comprising a hot water temperature detector provided in said merging channel and detecting a temperature of the mixed hot water flowing through said merging channel. 6. The flow meter includes a spiral impeller, and the components are arranged in this order from upstream to the hot water side and the water side stopcock, the mixing valve, the flow meter, and the hot water temperature detector. 6. The automatic mixing faucet according to claim 5, wherein