JPS5834726B2 - water heater - Google Patents

Description

[Detailed description of the invention] The present invention relates to a water heater.

In water heaters that use electric heaters that are currently in common use, even if high-temperature water is required quickly after the heater is energized, the water does not reach a certain temperature as a whole (1), so the high-temperature water cannot be used.

Another drawback is that a large amount of high-temperature water cannot be obtained if the system is designed to use high-temperature water quickly.

In view of the shortcomings of conventional water heaters, the present invention has been developed to allow use to begin immediately when a portion of the water in the tank rises to a high temperature. The water heater has been further improved to be able to respond to large requests even when the water inside the room rises to a high temperature and there is a large amount of demand. This system detects only the temperature of the water in the upper part of the tank and allows the water to be discharged when only the water temperature in the upper part reaches the appropriate temperature.This allows only a small amount of hot water to be requested. This eliminates the uneconomical need to raise the temperature of the entire tank to an appropriate temperature in some cases, and the details are as follows.

In the figure, 1 is a hot water storage tank, and 2 is a water supply pipe having a solenoid valve 3 connected to its lower part.

Reference numeral 4 denotes a hot water outlet pipe having a suction port inserted into the upper part of the tank 1, and has a solenoid valve 5 at its end.

6 is a control device, which includes a heater 7 at the bottom of the tank 1, upper and lower water temperature detection devices 9 and 10, and a level detection device 1.
1 and solenoid valves 3 and 5, and the stain magnetic valves 3 and 5 and the heater 7 are controlled by the detection devices 9 and 10 as described later.

Further, the signal line a of the lower detection device 10 is connected to the signal C connected to the control device 6 via the changeover switch 8, and when the switch 8 is switched to disconnect the signal line C from the signal line a, the signal C becomes the signal line. be connected to.

The present invention has the above-mentioned configuration, and cold water is supplied into the tank 1 from the water supply pipe 2 through the solenoid valve 3. When the water level in the tank 1 reaches the level detector 11, the control device 6 controls the solenoid valve 3.
is closed, and when the water level falls below the level detection device 11, the electromagnetic valve 3 opens, thereby maintaining the water level in the tank 1 within a certain range.

During times when many uses are expected, the selector switch 8 connects the signal lines a and c to the upper and lower detectors 9,
The circuit is configured so that 10 acts.

In this state, the water heated by the heater 7 is first collected in the upper part 1. When the water temperature near the upper hot water temperature detector 9 rises to a constant temperature 1, the temperature is detected by the detector 9 and the control device A signal is sent to 6, and this signal causes the control device 6 to open the solenoid valve 5, if requested, to prepare for discharging the hot water.

In addition, since the heater 7 is continuously energized regardless of the control action by the water temperature detection in the upper part, the cold water jd in the lower part of the tank 1 is
It is gradually heated until it reaches a certain temperature.

This hot water temperature is detected by the lower detection device 10, and only as a result, the power supply to the heater 7 is cut off.

Also, during times when only a small number of uses are expected, the selector switch 8 is completely switched to the signal line side, and the signal line C1b is connected.
Cut off signal line a.

In this case, the preparation for opening the electromagnetic valve 5 upon request after detecting the appropriate temperature and controlling the power supply to the heater 7 are performed only by the upper detector 9, and the lower detector 10 is inactive.

Therefore, even though only a small amount of water is required, all the water in the tank 1 will not be heated to a high temperature.

In addition, when the signal line of the detection device 9 is always connected to the control device 6 as in the illustrated example, the changeover switch 8 is connected to the detection device 1.
The effect may be merely to connect and disconnect the 0 signal line a and the signal line C on the control device side.

In addition, if the changeover switch 8 is automatically controlled by a timer and the time period for multiple requests and the time period for few requests are investigated and set in advance, it is possible to heat a large amount of hot water to a high temperature when not in use in an unmanned vending machine. Eliminates waste such as heating,
The energy saving effect is significant.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional front view showing an example of the device of the present invention. 1...Hot water storage kunk, 2...Water supply pipe, 3
, 5...Solenoid valve, 4...Hot water outlet pipe,
6...control device, 7...-e-evening, 8.
. . . Changeover switch, 9, 10 . . . Water temperature detection device, 11 . . . Level detection device.

Claims (1)

[Claims] 1 Hot water temperature detection devices are placed above and below the hot water storage tank, a heater is placed at the bottom of the hot water storage tank, and the water temperature is kept constant by controlling the energization of the heaters according to the signals of the hot water temperature sensing devices. A control device was installed to maintain the water temperature, and a lead-out pipe was installed to discharge hot water from the upper part of the hot water storage tank, and a water supply pipe was installed to supply water to the lower part of the tank, so that a fixed weight of hot water was discharged from the lead-out pipe each time it was requested. In a water heater, the signal line of the upper hot water temperature detecting device is connected to the control device in the middle of the signal line connecting the control device and the upper and lower hot water temperature detecting devices, and the lower signal line is cut off. 1. A hot water supply device characterized by being provided with a changeover switch for switching between connecting both a temperature detection device and a control device.