JP2548194B2 - Water heater - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a hot water supply apparatus having an electrically driven valve for starting and stopping hot water supply.

2. Description of the Related Art Conventionally, there is a hot water supply device of this type as shown in FIG. (For example, Japanese Utility Model Laid-Open No. 61-18424) In FIG. 4, the water supplied from the water supply 1 is supplied from the hot water supply pipe 2 to the hot water supply pipe 3 as hot water, and as it is from the water supply pipe 4 to the constant temperature hot water supply device 5. It A hot water side valve 6 and a water side valve 7 which are driven by a motor are provided inside the constant temperature hot water supply device 5, and a mixed hot water is supplied to a mixed hot water pipe 8 by adjusting a mixing ratio of hot water and water. . The mixed hot water pipe 8 is provided with a thermistor 9, and the hot water temperature detected here and the hot water temperature set by the setting device 10 are compared by the controller 11 to adjust the hot water temperature.

The mixed hot water passes through the faucet 12 of the terminal, and the bathtub 13
Is supplied to.

Problems to be Solved by the Invention However, since this conventional hot water supply apparatus is configured as described above, it has the following problems.

(1) Since it was necessary to start and stop the hot water supply at the faucet 12, the operation was troublesome, and sometimes a small amount of hot water continued to flow if the hot water was not fully closed.

(2) When the faucet 12 failed, hot water continued to flow, which was against water conservation and energy conservation.

(3) If the faucet 12 is opened and closed abruptly, water hammer may occur in areas with high water pressure, and the water heater 2 and the piping system may be damaged.

(4) There was a case where the faucet 12 was forgotten to be stopped and overflowed because there was no automatic filling means for the bathtub 13.

The present invention solves such conventional problems, and an object of the present invention is to provide a hot water supply device that ensures the stopping of water.

Means for Solving the Problems In order to solve the above problems, the hot water supply device of the present invention has a temperature adjusting means for adjusting the hot water supply temperature, an electric valve driven by a motor provided in the hot water supply path, An electrically driven valve that opens the hot water supply path by energizing it in series with a motor-operated valve in the hot water supply path and closes it by stopping the energization, a hot water supply setting device that sets the start and stop of hot water supply, and an electric motor according to the setting of this hot water supply setting device The control unit controls the valve and the electric drive valve, and includes a controller that performs control by changing the closing timings of the electric valve and the electric drive valve at the time of closing.

With the above-described configuration, the hot water supply device of the present invention starts and stops hot water supply by opening and closing the electrically operated valve and the electrically driven valve according to the setting of the hot water supply setting device, and at the same time, the electrically operated valve and the electrically driven valve are closed. The closing timing is changed to prevent water hammer and reduce the load on the side with less operating force.At the time of stoppage, both the motor-operated valve and the electric drive valve double stop the water. To ensure certainty,
At the time of power failure, the hot water supply path is automatically closed by the electrically driven valve to stop the hot water supply.

EXAMPLES Examples of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention. Hot water produced by the water heater 14 and supplied through the hot water pipe 15 and water supplied through the water pipe 16 enter the hot water inlet 18 and the water inlet 19 of the valve frame body 17. The hot water and water that have entered the valve frame body 17 pass through the rotary pressure balance valve 20 that balances the pressures of both sides, and then the mixing valve 21.
Leading to. In the mixing valve 21, a water side valve body 22 and a hot water side valve body 23 are provided on a shaft 24 and are urged by urging springs 25 and 26, and a stepping motor 27 provided externally provides a gear 28 and a position detector 29. Driven through. The mixed hot water temperature is detected by the thermistor 30, and the flow rate is detected by the flow rate sensor 31, and a signal is transmitted to the controller 32.
The motor-operated valve 33 includes a valve body 34, an external DC motor 35, and a gear.
36 and a position detector 37. The hot water supply path 38 is provided with an electromagnetic valve 39 that is an electrically driven valve that closes the hot water supply path 38 by energization and closes it by stopping energization. A hot water supply setting device 40 is provided for hot water supply, and starts and stops hot water supply and sets hot water supply temperature, flow rate, and integrated flow rate value.
Displaying etc.

FIG. 2 shows the details of the solenoid valve 39. A diaphragm packing 42 is provided in the valve frame body 41, and a path is opened / closed by opening / closing the pore 43 by a solenoid 45 provided outside by a plunger 44. The solenoid valve 39 is a so-called pilot solenoid valve, and is of a type in which hot water is immediately supplied when the valve is opened and gradually stopped when the valve is closed.

 Next, the operation of this embodiment will be described.

When the hot water supply setting device 40 is instructed to start hot water supply, the electric valve 33 and the solenoid valve 39 are opened to start hot water supply. The hot water supplied from the water heater 14 and the water are mixed by the mixing valve 21, and the thermistor 30
Is fed back to adjust the water temperature to the temperature set by the hot water supply setting device 40. The signals from the flow rate sensor 31 are integrated by the controller 32. The flow rate is adjusted by the electric valve 33 using the signal of the flow rate sensor 31. Hot water supply setting device 40 that instructs to start hot water supply
Corresponding to one switch operation of, usually used temperature,
The temperature and the flow rate value are preset so that hot water can be supplied at the flow rate. Of course, these values can be changed.

When the integrated flow rate value reaches a predetermined value, the motor-operated valve 33 and the solenoid valve 39 stop hot water supply. At this time, the hot water supply path is closed first by the electric valve 39. This is to close the flow path with the electrically-powered valve 33 having a relatively strong force first to reduce the load when the electromagnetic valve 39 having a weak force is closed. This also means that the solenoid valve
If 39 is not a slow motion type, slowly closing the path with the motor operated valve 33 also helps prevent water hammer.

The stop of the hot water supply can be stopped not only by the automatic stop by the flow rate integration but also by the operation of the hot water supply setting device 40. While the hot water supply is stopped, both the electric valve 33 and the solenoid valve 39 close the flow path.
The water can be stopped heavily, and even if one fails, the other can keep the water still. In addition, when automatic hot water filling of the bathtub by integrating the flow rate is performed by a timer operation or a telephone control operation from the outside by telephone, even if a power failure occurs during hot water supply, the solenoid valve 39 automatically closes the hot water supply path. , There is no risk of overflowing the bathtub or filling hot water that is not at the set temperature.

The effect of this embodiment is that the solenoid valve 39 is used as an electrically driven valve, so that the structure has a simple structure and the hot water supply path can be closed during a power failure without any special measures. At the time of stop, since the hot water supply path is closed by the electric valve 33 first, the load on the solenoid valve 39 at the time of closing is reduced,
Further, since the hot water supply can be automatically stopped by using the signal of the flow rate sensor 31, automatic hot water supply to a bathtub or the like can be realized,
Further, since it is an electric mixing valve, it can be controlled in conjunction with the setting of the hot water supply setting device.

As a valve that can automatically close the hot water supply path when the power supply is stopped, in addition to the solenoid valve, a spring return type electric valve that is driven by a motor and closes the path by the force of the spring when the power supply is stopped, a battery, There is a backup motor-operated valve that is closed by the power of the condenser. The automatic stop of the hot water supply may be performed by detecting the water level of the bathtub or controlling the hot water supply time by timer, in addition to the integration of the signal from the flow rate sensor.

FIG. 3 shows a second embodiment of the present invention. Hot water and water supplied from the hot water pipe 46 and the water pipe 47 enter the valve frame body 50 via the check valves 48 and 49. In the mixing valve 51, a ceramic fixed valve body 53 and a valve operating body 54 which are urged by a packing 52 are driven by a motor 55, and the maximum rotation angle is regulated by an angle detector 56. When the fixed valve body 53 is further rotated from the mixing area, the path is cut off and the hot water supply can be stopped. When driven in the closing direction, the hot water side passage is closed first, and then the water side is closed. This is to prevent hot water having a temperature higher than the set temperature from being supplied during closing, in case of emergency.

The mixed hot water temperature is detected by the thermistor 57, and the flow rate is detected by the flow rate sensor 58. A solenoid valve 60 is provided in the hot water supply path 59. A hot water supply setting device 61 is provided for hot water supply and
Connected to 62.

In the case of this embodiment, the mixing valve 51 has a mixing function and a path opening / closing function as an electrically operated valve. In addition, when hot water supply is stopped, the hot water supply path 59 is first closed by the solenoid valve 60. This is to prevent the low temperature hot water from being filled in the path when the mixing valve 51 is closed by closing the path with the mixing valve 51 after stopping the flow. Further, since the mixing valve 51 is first operated at the start of hot water supply and the electromagnetic valve 60 is subsequently closed, low-temperature hot water is not temporarily supplied at the time of re-hot water supply.

The effect of the second embodiment is that the mixing valve 51 also serves as a motor-operated valve, which simplifies the structure and that when the hot water supply is stopped, the electromagnetic valve 60 is closed first, so that the hot water is supplied again. That is, the temperature fluctuation can be reduced.

Effects of the Invention As described above, according to the hot water supply device of the present invention, the following effects are obtained.

(1) The hot water supply can be started and stopped by operating the hot water supply setting device to open and close the motor-operated valve and the electrically driven valve provided in the hot water supply path. , Deadline shortage does not occur.

(2) Since water is stopped by installing an electrically operated valve in the hot water supply path and an electrically driven valve in series with this, water can be stopped twice, ensuring water stoppage and double safety of water stoppage in case of failure. Can be realized.

(3) Since the control is performed with different closing timings of the electrically operated valve and the electrically driven valve, prevention of water hammer,
It is possible to reduce the load on the person with less operating force.

(4) An electrically driven valve that opens the hot water supply path by energizing it and closes it by stopping energization prevents water from automatically stopping even if there is a power failure during hot water supply, for example, preventing the bathtub from overflowing. it can.

[Brief description of drawings]

FIG. 1 is a partially cutaway view showing a hot water supply apparatus according to a first embodiment of the present invention, FIG. 2 is a sectional view of a solenoid valve used in the apparatus, and FIG. 3 is a part of a second embodiment. Fig. 4 is a cutaway configuration diagram, and Fig. 4 is a configuration diagram of a conventional hot water supply device. 21 …… Mixing valve (temperature control means), 32 …… Control valve, 33 ……
Motorized valve, 39 ... Solenoid valve (electrically driven valve), 40 ... Setting device,
51 …… Mixing valve (temperature control means, motorized valve), 60 …… solenoid valve (electrically driven valve), 61 …… setting device, 62 …… controller.

Continuation of the front page (56) References Japanese Patent Application Laid-Open No. 61-153425 (JP, A) Jpn. Microfilm (JP, U) Microfilm (JP, U), which is a photograph of the contents of the specification and drawings attached to the application of Japanese Patent Application No. 59-64875 (Japanese Utility Model Application No. 60-194219)

Claims (7)

(57) [Claims] 1. A temperature adjusting means for adjusting a hot water supply temperature, an electric valve driven by a motor provided in a hot water supply path, and a hot water supply path opened by energization provided in series with the electric valve in the hot water supply path for energization. An electrically driven valve that is closed by stopping, a hot water supply setting device that sets start and stop of hot water supply, and controls the electrically operated valve and the electrically driven valve according to the settings of the hot water supply setting device,
A hot water supply apparatus comprising a controller that controls the closing timings of the electrically operated valve and the electrically driven valve at the time of closing. 2. The hot water supply apparatus according to claim 1, wherein the electrically driven valve is an electromagnetic valve. 3. The hot water supply apparatus according to claim 1, wherein the hot water supply path is first closed by an electric valve when the hot water supply is stopped. 4. The hot water supply apparatus according to claim 1, wherein the controller starts hot water supply according to the setting of the hot water supply setting device, performs predetermined hot water supply, and automatically stops hot water supply. 5. The hot water supply apparatus according to claim 1, wherein the temperature adjusting means is an electrically controlled hot water mixing valve. 6. The hot water supply apparatus according to claim 5, wherein the hot water mixing valve also functions as an electric valve. 7. The hot water supply apparatus according to claim 5, wherein the hot water supply path is closed by an electrically driven valve when the hot water supply is stopped.