JPS6124842Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot water supply device, and particularly to improving a hot water storage method.

In conventional water heaters, a heating element is placed at the bottom of a hot water storage tank, and hot water generated by this heating element is stored in order from the top of the hot water storage tank, and a hot water temperature sensor installed at the bottom of the hot water storage tank is used to measure the temperature of the hot water in the hot water storage tank. The structure was such that the entire interior was maintained at a predetermined temperature or higher.

For this reason, when the hot water supply load is small, a method has been adopted in which the set temperature of hot water is lowered to reduce heat loss. However, it has the disadvantage that it is not suitable for applications that require high-temperature water, such as adding hot water to a bathtub or shaving.

The present invention has been devised in view of the above points, and an object of the present invention is to provide a water heater that is capable of storing hot water at a predetermined temperature throughout the hot water storage tank and that can quickly obtain the required amount of high-temperature water. With the goal.

For this reason, the present invention provides a hot water tank with a water supply port at the bottom and a hot water supply port at the top, with an upper pouring hole at the top and a bottom pouring hole at the bottom. a hot water supply path that is connected to the upper pouring port and the lower pouring port, the hot water supply path being connected to the upper pouring port and the lower pouring port; a hot water supply route switching means that is interposed at a branching part of the route and selectively switches the hot water supply route between a route leading to an upper pouring spout and a route leading to a lower pouring spout; and a water supply temperature detector that detects the temperature of the supplied water; A hot water amount regulator that operates based on a predetermined temperature detection signal from the water supply temperature detector, and means for detecting that an adjustable predetermined time has elapsed since the hot water supply operation by the hot water supply device, and a detection from the means. The hot water flow rate regulator includes a switch that stops the hot water supply operation by the hot water supply device in response to a signal.

In this configuration, when the hot water supply route switching means switches the hot water supply route to the route leading to the bottom pouring spout and the hot water supply device is operated, hot water is supplied from the bottom pouring spout into the hot water storage tank, and the entire hot water storage tank is filled. It becomes possible to store hot water at a predetermined temperature. or,
If you switch the hot water supply route to the upper spout, hot water will be supplied directly from the upper spout to the upper part of the hot water storage tank. It becomes possible to obtain the required amount quickly and with a relatively small amount of thermal energy.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, 1 is a hot water storage tank equipped with a hot water supply port 2 at the top and a water supply port 3 at the bottom, 4 is a hot water faucet connected to the hot water supply port 2, and 5 is a water supply tank between the water supply port 3 and a water supply source (not shown). A water supply pressure reducing valve 6 installed near the water supply port 3 is a water supply temperature detector provided near the water supply port 3, and closes when the water supply temperature is low and opens when the temperature is high. 7 is a safety valve connected to the hot water supply port 2; 8 is an upper pouring port provided at the top of the hot water storage tank 1; 9 is a bottom pouring port provided at the bottom of the hot water storage tank 1; 10 is near the bottom pouring port 9. There is a hot water temperature sensor installed. Here, a hot water supply device consisting of a pump 14 connected to a water supply source and a heat source 13 for heating the water sent out by the pump 14 is interposed, and the heat source 13 is branched into two from the downstream side and A hot water supply path 25 connected to the pouring spout 8 and the bottom pouring spout 9, and a hot water supply path 25 interposed at a branch part of the hot water supply path 25 to connect the hot water supply path 25 to the top pouring spout 8 and the bottom pouring spout 9. a switching valve 11 as a hot water supply route switching means for selectively switching between the hot water supply route and the hot water supply route;
A hot water amount regulator 20 that operates based on a predetermined temperature detection signal from the water supply temperature detector 6, that is, when the water supply temperature detector 6 detects a high temperature, and can be adjusted from the hot water supply operation by the hot water supply device. A water flow rate regulator 20 such as a timer is provided, which includes means for detecting that a predetermined time has elapsed, and a switch for stopping the hot water supply operation by the hot water supply device in response to a detection signal from the means.

To explain this configuration in detail, the upstream end of the hot water supply path 25 is connected between the pressure reducing valve 5 and the water supply port 3. The switching valve 11 has an upper pouring spout 8 and a lower pouring spout 9.
two selection ports 11b, 1 connected respectively to
1c and a common port 11a. A switching valve 12 selectively guides high-temperature hot water to the common port 11a of the switching valve 11, and its selection port 12b is connected to the common port 11a. The heat source 13 is connected to the common port 12a of the switching valve 12. 15 is a heat exchanger connected to the selection port 12c of the switching valve 12; 16 is a bathtub whose temperature is raised by receiving the heat of the hot water flowing through the heat exchanger 15; 17 is a power source; and 18 is a heat source generated by the heat source 13. A selection switch is used to select whether to supply high-temperature hot water to the hot water storage tank 1 or the heat exchanger 15, and its common terminal 18a is connected to the power source 17.

Reference numeral 19 denotes an electric motor for driving the switching valve 12 connected to the switching terminal 18b of the selection switch 18, and when excited, the common port 12a is brought into communication with the selection port 12c. The hot water temperature regulator 20 is connected to the switching terminal 18c of the selection switch 18 via the hot water temperature detector 10. 21 is a relay connected in series to the hot water temperature detector 10, and is equipped with an excitation coil 21a and contacts 21b, 21c, and 21d. When the excitation coil 21a is excited, the contacts 21b and 21d are closed, and the contact 21c is closed. While opening, the excitation coil 21
When a is demagnetized, each contact 21b, 21c, 21d
is the opposite of the above.

22 is the excitation coil 21a of the relay 21 and the contact 2
1b is a changeover switch that selects whether to selectively force the hot water flow regulator 20 connected in series or to operate it according to the water supply temperature.
2a is the contact 2 between the exciting coil 21a and the contact 21b.
2c is the supply water temperature detector 6, and the contact 22d is the power supply 1.
7, and the contact 22b is an open terminal. 23 is a motor for driving the switching valve 11 connected to the contact 21c of the relay 21; 24 is a relay connected to the switching terminal 18b of the selection switch 18; A contact point 24b connecting the terminal 18b and the pump 14, the hot water amount regulator 20, and the pump 1
4 and a contact point 24c that connects the contact point 24c.

The operation of the water heater having such a configuration will be explained.

First, when the selection switch 18 is connected to the changeover terminal 18b side and the changeover switch 22 is connected to the contact 22c side, if the feed water temperature is low, the feed water temperature detector 6 is in the closed state, so the relay 21 is closed. The excitation coil 21a is excited, and the contacts 21b and 21d are closed, while the contact 21c is opened. Due to the state of this relay 21, the hot water amount regulator 20 is short-circuited and becomes inactive, and the electric motor 23 becomes demagnetized. Further, since the electric motor 19 is also in a demagnetized state, the common port 11a and the selection port 11b of the switching valve 11 are in communication, and the common port 12a and the selection port 12b of the switching valve 12 are in a communication state.

Therefore, the high-temperature hot water generated by the heat source 13 flows to the bottom pouring port 9 via the switching valves 11 and 12,
Hot water flows into the hot water storage tank 1 and is gradually stored from the top. When this operation continues and the hot water temperature detector 10 installed in the hot water storage tank 1 detects a hot water temperature higher than the set temperature, the hot water temperature detector 10 opens, and the relay 21, pump 14, and heat source 13
The power supply to the unit is interrupted.

On the other hand, if the feed water temperature is high, the feed water temperature detector 6
is opened, so the excitation coil 21a of the relay 21
is not excited, contacts 21b and 21d are open, while contact 21c is closed.

As a result, the electric motor 23 is excited, and the switching valve 1
In the switching valve 1, the common port 11a and the selection port 11c are in communication, and in the switching valve 12, the common port 12a and the selection port 12b are in communication.

Therefore, the high temperature hot water generated by the heat source 13 flows to the upper pouring port 8 via the switching valves 11 and 12.
The hot water directly flows into the upper part of the hot water storage tank 1 and is stored therein.
This inflow amount is determined by the time set by the hot water flow rate regulator 20, and when the time has elapsed, an internal switch of the hot water flow rate regulator 20 is opened, and power supply to the pump 14 and heat source 13 is stopped. As a result, the operation of supplying high temperature hot water to the upper part of the hot water storage tank 1 is stopped.

Next, when the changeover switch 22 is connected to the contact 22d side, the feed water temperature detector 6 is short-circuited, the excitation coil 21a of the relay 21 is energized regardless of the feed water temperature, and the hot water amount regulator 20 is short-circuited. This results in
power supply 17, selection switch 18, hot water temperature detector 10,
A series circuit consisting of a pump 14 and a heat source 13 is configured, and high-temperature hot water flows into the lower part of the hot water storage tank 1 via the switching valves 11, 12 and the bottom pouring spout 9, and is gradually stored from the upper part. Then, when the storage operation continues and the hot water temperature in the hot water storage tank 1 reaches the set temperature, the hot water temperature detector 10 opens, the power supply to the pump 14 and the heat source 13 is stopped, and the hot water in the hot water storage tank 1 The temperature is maintained at a substantially constant value.

On the other hand, when the changeover switch 22 is connected to the contact 22b side, the excitation coil 21a of the relay 21 is not excited, so the contact 21d is opened, and the power supply 17, selection switch 18, hot water temperature detector 10, and hot water amount regulator 2
0, a pump 14 and a heat source 13 form a series circuit. On the other hand, since the contact 21c of the relay 21 is closed, the electric motor 23 is energized, the common port 11a and the selection port 11c of the switching valve 11 communicate with each other, and the high temperature hot water generated by the heat source 13 is supplied to the upper pouring port. The hot water is directly stored in the upper part of the hot water storage tank 1 via the hot water flow controller 8, and the storage operation continues for the time set by the hot water flow regulator 20. When this time has elapsed, the internal switch of the hot water flow regulator 20 is opened and the pump 14 The power supply to the heat source 13 is stopped. As a result, the operation of supplying high temperature hot water to the upper part of the hot water storage tank 1 is stopped. In the above configuration, by supplying hot water into the hot water storage tank 1 from the bottom pouring port 9,
Hot water is gradually stored in the hot water storage tank 1 from the top, so that hot water at a predetermined temperature can be stored throughout the hot water storage tank 1. In this case, as shown in this embodiment, the hot water temperature may be adjusted to a set temperature using the hot water temperature detector 10.

In addition, by supplying hot water into the hot water storage tank 1 from the bottom pouring spout 9 and adjusting the supply amount using the hot water amount regulator 20, it is possible to easily obtain the required amount of high-temperature water for purposes such as adding hot water to a bathtub or shaving. Since the hot water storage tank 1
There is no need to store high-temperature water throughout the interior.
Thermal energy can be saved, and the energy saving effect is greatly demonstrated. In this case, in this embodiment, the hot water amount regulator 20 is configured to automatically operate based on a predetermined temperature detection signal from the feed water temperature detector 6, that is, when the feed water temperature detector 6 detects a high temperature. Therefore, the required amount of high-temperature water can be quickly obtained with relatively small amount of energy, and the usability can be improved and the energy saving effect can be further improved.

In contrast, the selection switch 18 is switched to the switching terminal 1.
When connected to the 8b side, the excitation coil 2 of the relay 24
4a is excited, contact 24c is opened, and contact 24b is closed. At the same time, electric motor 19
is excited, the common port 12a and the selection port 12c of the switching valve 12 communicate with each other, and the high temperature hot water generated by the heat source 13 flows through the heat exchanger 15, and the bathtub 1
Heat the water in 6.

In this way, it is possible to selectively switch between the hot water supply function and the function of radiating heat to objects to be heated, such as water in the bathtub 16, so it is possible to obtain a hot water supply device that can be used for multiple purposes.

In the above embodiment, the water in the bathtub 16 is heated, but it can also be used as heat for heating.

As explained above, according to the present invention, high-temperature hot water can be selectively supplied to the upper and lower parts of a hot water storage tank, and the amount of hot water is determined based on a predetermined temperature detection signal from a water supply temperature detector. Since it is configured to be adjusted by an operating hot water temperature regulator, it can be used either when you want to store hot water at a predetermined temperature throughout the hot water storage tank or when you want to quickly obtain high-temperature water for purposes such as adding hot water to the bathtub or shaving. This has a great practical effect of being able to provide a hot water supply device that is compatible with the above, has excellent usability, can save thermal energy, and can exhibit a great energy saving effect.

[Brief explanation of the drawing]

FIG. 1 shows a schematic system diagram of a water heater according to an embodiment of the present invention, and FIG. 2 shows a control circuit diagram of the same device. 1...Hot water storage tank, 2...Hot water supply port, 3...Water supply port, 6...Water supply temperature detector, 8...Upper pouring port, 9
...Bottom pouring spout, 11, 12...Switching valve, 13...
Heat source, 14... Pump, 20... Hot water amount regulator, 2
2... Selector switch, 25... Hot water supply path.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A hot water storage tank with a water supply port at the bottom and a hot water supply port at the top, with an upper pouring port at the top and a bottom pouring port at the bottom, and a pump connected to a water supply source. and a heat source for heating the water sent out by the pump, and the hot water supply path is branched into two from the downstream side of the heat source and connected to the upper pouring port and the lower pouring port. a hot water supply route switching means that is interposed at a branch of the hot water supply route and selectively switches the hot water supply route to a route leading to the upper pouring spout and a route leading to the lower pouring spout; and a water supply that detects the temperature of the supplied water. a temperature detector, and a hot water amount regulator that operates based on a predetermined temperature detection signal from the feed water temperature detector, and means for detecting that an adjustable predetermined time has elapsed since the hot water supply operation by the hot water supply device. A hot water supply device comprising: a hot water amount regulator equipped with a switch that stops the hot water supply operation by the hot water supply device in response to a detection signal from the means. (2) The hot water supply device according to claim 1, wherein the hot water supply route switching means is configured to switch the hot water supply route based on a predetermined hot water detection signal from a water supply temperature detector.