JPH0643635Y2 - Hot water storage type electric water heater - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a hot water storage type electric water heater, such as a kitchen, a hospital, a school, or a kitchen where only a limited space is secured. It is ideal for installation in a hot water supply room or tea supply room, and can be easily installed even if there is a hanging cabinet nearby, ensuring the safety of the user and having an excellent design. A hot water storage type electric water heater that replaces the water (hot water), automatically controls drainage and hot water supply by program operation using a computer, etc., and keeps the piping at the time of installation to a minimum length to achieve high efficiency Regarding water heaters.

(Prior Art) Conventionally, most of the hot water supply devices of this type have the following structure.

That is, it consists of a heating hot water tank that also serves as a hot water storage, a heating device arranged below it, and a control device that appropriately adjusts the heating device. The heating hot water tank has a transparent tubular shape for checking the amount of hot water in the heating hot water tank. A water level gauge is exposed on the front side, and a pointer-type thermometer is also installed on the front side.
Further, the operation knob of the control device is also projected to the front side, and further the tapping itself for connecting each pipe is also projected.

(Problems to be solved by the invention) However, such a structure has the following problems.

That is, the first is that the water level gauge is exposed and attached to the front surface, and hot water having a temperature close to 100 ° C. in the heating water tank also passes through the water level gauge.

For this reason, the temperature of this water level gauge is often close to 100 ° C, and it is extremely dangerous as the user may get burned when touching the water level gauge. Hot water often exudes, and there is an unsightly problem due to the accumulation of scale.

Secondly, since the operation knob is projected to the front, the user may get caught in the knob, which hinders the control operation. At the same time, it does not look good in terms of design, and in combination with the pointer-type thermometer that is also installed on the front side, there is an image of the old type from a design perspective, and there is a desire to purchase. There was a problem that lowered it.

Thirdly, since the tapping itself that connects each pipe is also provided so as to project, the pipe is exposed in the vicinity of the device even if installation work is performed by embedding the pipe, and heat insulation work is performed on the exposed pipe. However, there is also a problem that the device cannot be moved too much when there is a hanging cabinet nearby.

On the other hand, recently, the two-day workweek system has become widespread, and the days off at business establishments are often long.In such cases, the inside of the water heater installed in the kitchen or hot water supply room Hot water and water are supposed to stay in the hot water tank for a long time.

However, since the disinfectant has disappeared in the hot water that once reached the boiling point, there is a concern that bacteria will be generated when it falls to a low temperature.
In addition, there is a hygienic problem that harmful insects such as cockroaches intrude in from the drainage port in terms of temperature, or heavy metals are eluted by hot water that has stayed for a long time.

For this reason, when using the water heater after it has been stopped for a long time, it is necessary to open the manual drain valve provided in the heated water tank to drain water before use and replace the water in the heated water tank. was there. However, it is often the case that the administrator of the water heater forgets to change the water due to carelessness, and it is not intentionally done because it takes time and effort.

In view of the above-mentioned problems and the like, the present invention can be easily installed even if a hanging cabinet or the like is provided nearby, which is excellent in design while ensuring the safety of the user, and when installing. Keep the piping of to a minimum length for high efficiency, and
The present invention has been devised as a subject to provide a hot water storage type electric water heater / heater capable of systematically performing automatic control such as replacement of water in a heating water tank and economical hot water supply.

(Means for Solving Problems) The present invention is directed to a heating hot water tank that also serves as a hot water storage for heating and storing water, a heating device disposed under the heating hot water tank, a heating device, and a control device for appropriately adjusting hot water supply / drainage. And a water supply pipe for supplying water to the heated hot water tank from a ball tap, an overflow pipe for preventing the water level in the heated hot water tank from becoming abnormally high, and a drain pipe connected to a drain port provided at the bottom of the heated hot water tank. In a hot water storage type electric water heater provided with a hot water supply pipe for supplying hot water from the heating hot water tank and a hot water supply pipe for exhausting hot water in the heating hot water tank, the water supply pipe and the ball tap, the hot water supply pipe and the disposable hot water supply pipe, And an electrically operated valve that opens and closes the water passage between the overflow pipe and the drainage port,
And a measurement display device for electrically measuring and displaying the water level, the control device appropriately automatically controls the opening and closing switching of the electrically operated valve, and the display value measured and displayed by the measurement display device. Is an electronic control device that electrically controls to obtain a desired value, and all of these constituent devices are contiguously covered by a protective case, and this protective case covers at least the material at the position of the display unit of the measurement display device. By forming the transparent material with low transparency, the hot water supply pipe is also formed of an expandable tube, and a floating body is provided at the upper end of the hot water supply pipe, and the hot water supply port is provided near the floating body in the expandable tube. By providing the above, the above-mentioned problems can be solved.

(Effect) A hot water storage type electric kettle hot water supply device according to the present invention is a heating hot water tank for heating and storing water, a heating device arranged under the heating hot water tank, and a control for appropriately adjusting the heating device and hot water supply / drainage. Equipment, water supply pipe for supplying water to the heated hot water tank from the ball tap, overflow pipe for preventing abnormally high water level in the heated hot water tank, and drain pipe connected to the drain port provided at the bottom of the heated hot water tank In a hot water storage type electric water heater equipped with a hot water supply pipe for supplying hot water from the heating hot water tank and a single-use hot water supply pipe for exhausting the hot water in the heating hot water tank, The measurement and display device which measures and displays the water temperature, displays the hot water temperature and the water level without making the structure exposed to the outside like the conventional hot water thermometer and water level gauge, and informs the user. At the same time, the control device is an electronic control device that electrically controls the display value measured and displayed by the measurement display device to be a desired value, and all control operations are operated by the non-protruding operation panel.

Then, the pipes for water supply, hot water supply, and drainage attached to the heating hot water tank, the heating hot water tank also serving as hot water storage, the heating device, and the control device are close to each other and concealed by a protective case, and any high-temperature members or protrusions are external Do not expose anything.

Moreover, this protective case is formed of a light-transmissive material having low transparency at least at the position of the display portion of the measurement display device, and the numerical value displayed on the display portion of the measurement display device is
It is made visible only when it is displayed, and otherwise the part of the light-transmissive material having low transparency functions as a reflector such as a mirror.

In addition, water supply pipe and ball tap, hot water supply pipe and single-use hot water supply pipe,
And automatically controlling the opening and closing of an electrically operated valve provided in the water passage between the overflow pipe and the drain outlet by a control device,
This is to replace hot water or water in the hot water tank, or to use up.

Further, the hot water supply pipe is formed of a telescopic tube, and a floating body is provided at the upper end of the hot water supply pipe. A hot water supply port is provided near the floating body in the telescopic pipe to float the hot water in the hot water tank. The hot water supply port is always located near the surface of the hot water.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

That is, reference numeral 1 shown in the drawing is a heating hot water tank which also serves as a hot water storage for heating and storing water, and the hot water tank 1 also serving as a hot water storage has therein a float 2 and a hot water tap (not shown) from the heating hot water tank 1.
In order to supply hot water to the side, a hot water supply pipe 4 is provided upright from the bottom 1a, and similarly, a flood water pipe 5 is provided upright to prevent the water level in the heated hot water tank 1 from becoming abnormally high. A ball tap 3 that starts and stops water supply by the movement of the float 2 and a water supply duct 6 that prevents cold water from flowing into the hot water tank 1 that also serves as a hot water storage at a time when water is supplied are arranged on the side surface.

In the vicinity of the hot water supply pipe 4, a single-use hot water supply pipe 16 for exhausting the hot water in the heated hot water tank 1 is provided upright.
And the single-use hot water supply pipe 16 are connected by a branch pipe 18,
The branch pipe 18 is provided with a single-use hot water supply valve 17 as an electrically operated valve (for example, a motor valve, a thermal valve, a solenoid valve) for opening and closing the water passage formed by the branch pipe 18 to open and close the water passage as appropriate. To control.

Further, a water conduit 7, a hot water supply pipe 8, and a drainage port 13 are collectively arranged below the heated hot water tank 1, and these are all piped toward the rear of the heated hot water tank 1 also serving as a hot water storage. . A water supply source (not shown) is provided between the ball tap 3 and the water conduit 7 along the lateral side of the heated hot water tank 1.
A water supply pipe 10 which is a member for supplying water to the heated hot water tank 1 through the ball tap 3 and communicates with each other. The hot water supply pipe 8 is connected to the hot water supply pipe 4 and the drain pipe 9 is connected to the overflow pipe 5. is there.

Moreover, an electrically operated valve (for example, a motor valve, a thermal valve, a valve for opening and closing the water passage) between the water conduit 7 and the water supply pipe 10
The water supply valve 11 as a solenoid valve is provided with the overflow pipe 5 and the drain port 13
A drain valve as an electrically operated valve (eg, motor valve, thermal valve, solenoid valve) that opens and closes this water channel between
12 are arranged to control water supply and drainage respectively.

The drain valve 12 is connected to the drain port 13 and the overflow pipe 5 via the drain pipe 9 and the branch pipes 14 and 15, respectively. This drain valve 12 can switch the water passage from the drain port 13 to either communication or cutoff with the branch pipes 14 and 15.

The valves 11, 12 and 17 arranged in this way are controlled by the control device 23, which is, for example, a microcomputer (not shown) to perform water supply / drainage / hot water supply operations. Normally, the water supply valve 11 is opened. The drain valve 12 is closed, and water is supplied while controlling the water level with the ball tap 3. In addition, the hot water storage type electric water heater of the present invention is capable of economical hot water supply. In this case, the water supply valve 11 is closed and the hot water supply valve 17 is used as a branch pipe.
When switched to the 18 side, overflow water is discharged from the drainage port 13 through the branch pipe 15 through the drainage pipe 9, hot water is supplied by the hot water supply pipe 4, and if the water level is lower than the upper end of the hot water supply pipe 4,
The single-use hot water supply valve 17 is opened to allow the remaining hot water to flow from the single-use hot water supply pipe 16 through the branch pipe 18 to the hot water supply pipe 8 so that the hot water in the heating hot water tank 1 can be used up. In this case, water supply should be stopped. With this single-use hot water supply, there is no need to boil water because the water is not supplied into the heated hot water tank 1.
The remaining hot water can be used economically. Further, when hot water of a constant temperature is required, it is possible to economically use the remaining hot water while controlling the hot water temperature without turning off the heat source. Then, when replacing the so-called dewatered water (hot water), the water supply valve 11
Is closed and the drain valve 12 is switched to the side of the branch pipe 14, the water in the heated water tank 1 is drained from the drain port 13 through the drain pipe 9 with the water supply stopped. When the drainage is completed, the water supply valve 11 is opened and the drainage valve 12 is closed to supply the water. When the water is full, the ball tap 3 operates to stop the water supply.

The above operation can be automated in combination with the program control by the timer function, and one mode thereof will be described next.

First of all, the heating device 24 is turned on at 6:00 am from Monday to Friday in anticipation of the time required to complete the boiling at the beginning of the business, and the hot water temperature is detected by a temperature sensor (not shown). Controlled to hold 95 ° C to 100 ° C and programmed to turn off at 6pm. Then, after that, the above-described hot water supply is performed. Also, as another pattern, for example, for overtime workers,
The heating device 24 may be programmed to be turned off at 10 pm, and the hot water temperature may be controlled during hot water supply. On the other hand, on holidays such as Saturday and Sunday, heating device 24
Is turned off all day, but the above-mentioned water replacement is programmed to be performed at 5 am on Monday (or the day after the holiday). This allows the water replacement to be completed before the heating device 24 is turned on at 6 am.

In the embodiment shown in FIG. 1, two valves 11 and 12 are used, but one valve may be used. In this case, a four-way valve is used as shown in FIG. The electrically operated valve 19 includes a water supply pipe 10 and a drain pipe 9.
Is connected, and the water channel of the drainage pipe 9 can be switched to be connected or disconnected with any one of the water supply pipe 10, the branch pipe 14 on the overflow pipe 5 side, and the branch pipe 15 on the hot water supply pipe 4 side. In this case, the drainage port 13 provided in the bottom portion 1a of the heated hot water tank 1 also serves as a water supply port. To supply water into the heated hot water tank 1 by the program operation, the electrically operated valve 19 is connected to the water supply pipe as shown in FIG. 3 (a).
This is performed by switching to the 10 side, and when the ball tap 3 confirms that the water is full, the electrically operated valve 19 switches to the closed state. For other automatic controls, hot water is used up when the electrically operated valve 19 is switched as shown in FIG. 3 (b), drainage is performed in the state of FIG. 3 (c), and normal operation is performed in the state of FIG. 3 (d). Each is placed underneath, and in the state of FIG. 3 (d), the hot water tank 1 is heated by the ball tap 3.
When the decrease in the amount of hot water in the inside is confirmed, the electrically operated valve 19 is switched to the state shown in FIG. 3A, and water is supplied into the heated hot water tank 1.

A water level detection sensor may be used instead of the ball tap 3.

On the other hand, a heating device 24 is arranged in the lower part of the heated water tank 1 so as to heat the water in the heated water tank 1, and
Below the heating water tank 1, as a measurement display device, a water temperature display measuring device 2 for measuring and displaying the water temperature in the heating water tank 1
2, and water level display device 2 that electrically measures and displays the water level
1, the display devices 21 and 22 are arranged facing the front. Then, in order to set the values displayed by these display devices 21 and 22 to desired values, in practice, the hot water temperature setting, drainage timing setting, etc., as appropriate, as shown in FIG. Controlled by 23.

The control device 23 is formed of an electronic control device that electrically controls, and the control setting uses a touch sensor switch with as few protrusions as possible.

And, these heated hot water tank 1, water conduit 7, hot water supply pipe 8,
Drain pipe 9, water supply pipe 10, water supply valve 11, drainage valve 12, single-use hot water supply valve 17, water level display device 21, hot water temperature display device 2
2.The control device 23 is concealed by a protective case 25 in close proximity, and the protective case 25 is made of at least the material at the position of the display portion of the water level display device 21 and the hot water temperature display device 22, actually the front surface is entirely transparent. Low translucent materials, such as smoked glass,
Alternatively, it is formed of a plastic plate.

On the other hand, the hot water supply pipe 4 is formed of an expandable tube,
If a floating body 26 is provided at the upper end and a hot water supply port 27 is provided in the vicinity of the floating body 26 in this expandable tube, the hot water supply port 27 is always located near the water surface with respect to the vertical movement of the water level in the heated hot water tank 1. Since it follows as it is, it is possible to handle everything from normal hot water to hot water supply.

In addition, the hot water storage type electric water heater according to this invention is
8, 9, 10 position, position of water supply valve 11 and drainage valve 12 and position of single-use hot water supply valve 17, water level display device 21, hot water temperature display measuring device 22, position and type of control device 23, etc. It goes without saying that the present invention is not limited to the above-mentioned embodiments.

(Effects of the Invention) The present invention configured as described above has a heating hot water tank 1 for storing and heating water, a heating device 24 arranged under the heating hot water tank 1, and a control device for appropriately adjusting the heating device 24. 23,
Water supply pipe 10 for supplying water from the ball tap to the heated water tank 1
And an overflow pipe 5 for preventing the water level in the heated hot water tank 1 from becoming abnormally high, a drain pipe 9 connected to a drain 13 provided at the bottom 1a of the heated hot water tank 1, and for supplying hot water from the heated hot water tank 1. In the hot water storage type electric water heating and hot water supply device provided with the hot water supply pipe 4 and the hot water supply pipe 16 for exhausting the hot water in the hot water tank 1, the hot water temperature and the water level in the hot water tank 1 are electrically measured. By providing the measurement display device 21 for displaying, the hot water temperature and water level can be displayed and notified to the user without the need for the structure to be exposed to the outside like the conventional hot water thermometer or water level meter. The user will not touch the water level gauge and there is no risk of burns.

Moreover, the problem of forgetting hot water or water replacement work due to the user's carelessness is solved, which is effective in management of the water heater, and hot water can be supplied hygienically and economically. .

Along with that, the control device 23 is changed to a water level display device.
Since it is an electronic control device that electrically controls the display value measured and displayed by the hot water temperature display measuring device 22 and the hot water temperature display measuring device 22, all control operations can be operated by a non-protruding operation panel. In combination with the water level display device 21 and the hot water temperature display measurement device 22 described above, the design is very refreshing and the purchase will be motivated.

Moreover, if each valve 11, 12, 17 is controlled by the control device 23 as in the above-described embodiment, the operation of the hot water storage type electric water heater can be fully automated by the program operation. Discharge hot water, and automatic drainage etc. are set appropriately and automatically controlled by the control unit 23.Regular water supply / drainage replacement and residual use are automatically performed. It is possible to suppress the generation of bacteria in the accumulated water, and it is very effective in terms of hygiene.

Then, the respective pipes 8, 9, 10, 1 attached to the heating water tank 1 for water supply, hot water supply, automatic single-use hot water supply, and automatic drainage
6. The hot water tank 1, the heating device 24, and the control device 23 are contiguously covered by a protective case 25 so that no high-temperature members or projections are exposed to the outside. Do not get injured by contact with such as.

Moreover, since the compartment with the outside world is completely determined by this protective case 25, if the compartment is minimized as much as possible, there is nothing that protrudes at a high temperature outside, so that, for example, a hanging cabinet or the like is nearby. Even if it is installed, it can be installed close to the hanging cabinet, etc., and in terms of safety against heat, the space between the protective case 25 and the heating device 24, and the protective case 25 and the heated water tank 1 It will be insulated and will not be worried at all.

Then, the protective case 25, at least the material of the position of the display unit of the measurement display device is formed of a low translucent material, the numerical value displayed on the display unit of the measurement display device,
By making it visible only when it is displayed, and by making the part of the translucent material with low transparency act as a reflector like a mirror, it can be used as a convenient mirror for the user. Even if it is installed in a small tea room, it feels like there is depth due to the effect of the mirror, and it is possible to eliminate the feeling of pressure.

Furthermore, the fact that it can be installed close to the installation in this way means, for example, that it can be installed close to the sink or the like, so that the piping can be made as short as possible,
Further, if the faucet is directly attached to the device according to the present invention, the cost of placement can be further improved, and the heat efficiency can be made very good by minimizing the heat radiation.

On the other hand, the hot water supply pipe 4 is formed of an expandable tube,
If a floating body 26 is provided at the upper end and a hot water supply port 27 is provided in the vicinity of the floating body 26 in this expandable tube, the hot water supply port 27 is always located near the water surface with respect to the vertical movement of the water level in the heated hot water tank 1. Since it follows as it is, it is possible to cope with everything from normal hot water supply to single-use hot water supply, thereby
It is possible to replace water in the heating water tank 1 and economically use up hot water by systematically and automatically controlling.

As described above, according to the present invention, the hot water storage type electric water heater is very excellent in hygiene and can be easily installed even if a hanging cabinet or the like is provided nearby. While ensuring safety, it is also excellent in design, and the piping during installation is kept to a minimum length for high efficiency.
It is useful for female users to adjust their tastes, eliminates pressure, and exerts practically useful effects such as motivating consumers to purchase.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a partially cutaway perspective view, Fig. 2 is a front view, and Figs. 3 (a), (b),
FIGS. 4 (c) and 4 (d) are operation views of an operating state of an electrically operated valve, and FIG. 4 is a front view of essential parts when a floating body is provided at an upper end of a hot water supply pipe which is expandable and contractible. 1 ... Heating water tank, 1a ... Bottom part, 2 ... Floater, 3 ... Ball tap, 4 ... Hot water supply pipe, 5 ... Overflow pipe, 6 ... Water supply duct, 7 ... Water conveyance pipe, 8 ... Hot water supply Piping, 9 ... Drain pipe, 10 ... Water supply pipe, 11 ... Water supply valve, 12 ... Drainage valve, 13 ... Drainage port, 14 ... Branch pipe, 15 ... Branch pipe, 16 ... Disposable hot water supply pipe , 17 ... Disposable hot water supply valve, 18 ... Branch pipe, 19 ... Electrically operated valve, 21 ... Water level display device,
22 …… Hot water temperature measuring device, 23 …… Control device, 24 …… Heating device, 25 …… Protective case, 26 …… Floating body, 27 …… Hot water inlet.

Claims (2)

[Scope of utility model registration request] 1. A heating hot water tank that also serves as a hot water storage for heating and storing water, a heating device arranged under the heating hot water tank, a control device for appropriately adjusting the heating device and hot water supply / drainage, and water supply from the ball tap to the heating hot water tank. Water supply pipe, an overflow pipe that prevents the water level in the hot water tank from rising abnormally, a drain pipe connected to the drain port provided at the bottom of the hot water tank, and hot water supply for supplying water from the hot water tank In a hot water storage type electric water heater equipped with a pipe and a hot water supply pipe for exhausting the hot water in the heating water tank, the water supply pipe and the ball tap, the hot water supply pipe and the hot water supply pipe, and the overflow pipe and the drain outlet An electrically operated valve that opens and closes the water passage between
And a measurement display device for electrically measuring and displaying the water level, the control device appropriately automatically controls the opening and closing switching of the electrically operated valve, and the display value measured and displayed by the measurement display device. Is an electronic control device that electrically controls to obtain a desired value, and all of these constituent devices are contiguously covered by a protective case, and this protective case covers at least the material at the position of the display unit of the measurement display device. A hot water storage type electric water heater equipped with a transparent material having low transparency. 2. The hot water storage pipe according to claim 1, wherein the hot water supply pipe is formed of a telescopic pipe, and a floating body is provided at an upper end thereof, and a hot water supply port is provided in the vicinity of the floating body in the telescopic pipe. Type electric water heater.