JP2002139243A - Hot water supply unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the operability of a temperature setting switch at pouring of hot water, and secure the safety against a scald in high temperature setting caused by erroneous operation, by providing a hot water supplier with an exclusive switch where the display and cancel of specified high temperature setting are possible with one time of switch operation. SOLUTION: A hot water supply unit comprises a hot water supplier and a remote controller which controls the operation of the hot water supplier, and the remote controller has an operation switch which controls the operation/ stoppage of the above hot water supplier, a temperature indicator which indicates to set temperature of the hot water delivered from the above hot water supplier, and a setting switch which changes the set temperature indicated on the above temperature indicator, and also has a high temperature setting switch where the operation for the amount of several times can be performed with one time of operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater having a temperature setting function.

[0002]

2. Description of the Related Art FIG. 2 shows a conventional remote control of a water heater having a temperature setting function. The operation switch 1 controls the operation / stop of the hot water supply device. When the operation switch 1 is depressed, the water heater becomes operable and hot water can be discharged. At this time, the temperature indicator 4 lights up the tapping temperature of the water heater. When the operation switch 1 is pressed again, the operation is stopped and the hot water cannot be supplied. At this time, the temperature indicator 4 is turned off. Each time the up switch 2 is pressed when the temperature display 4 is turned on when the temperature display 4 is turned on, the display of the temperature display 4 counts up for each preset number of stages, and each time the down switch 3 is pressed, the temperature display is displayed. The display of 4 counts down every preset number of stages. In the case of the temperature setting step of a general water heater, when the temperature is from 37 ° C. to 75 ° C., the temperature from 37 ° C. to 50 ° C. is set in steps of 1 ° C.

[0003]

SUMMARY OF THE INVENTION In a water heater having no reheating function, hot water to a bath tub drops hot water from a water faucet (curan) installed near the bath tub. As time elapses after the hot water is dropped, the temperature of the bath water gradually decreases, especially in winter when the outside air temperature is low. When the temperature of the bath water drops, there is a method of raising the water temperature by pouring hot water to a temperature at which hot water can be bathed. At this time, the setting temperature of the remote controller is generally set to a temperature for taking a normal shower (40 ° C. to 42 ° C.).
Change the setting to 0 ° C or 75 ° C. To change the temperature setting to 75 ° C when the hot water temperature is 40 ° C,
It is necessary to press the up switch twice, and further, to return to the original temperature setting even after the completion of hot water, the user must again press the down switch 12 times. As described above, the operation of setting the temperature when hot water is supplied from the spout is very troublesome. The present invention improves the operability of the temperature setting switch at the time of high-temperature hot water supply by providing a dedicated switch capable of displaying and canceling a predetermined high-temperature setting with a single operation of the switch. The purpose is to ensure safety against burns.

[0004]

The present invention has the following features. (1) A water heater and a remote controller for controlling the operation of the water heater. The remote controller includes an operation switch for controlling the operation / stop of the water heater, and a set temperature of hot water discharged from the water heater. And a setting switch for changing a set temperature displayed on the temperature display, and a high-temperature setting switch capable of operating a plurality of setting switches in one operation. apparatus. (2) The setting switch comprises an up switch for increasing the set temperature and a down switch for decreasing the set temperature (1)
A hot water supply device according to item 1. (3) When the high temperature setting switch is pressed once for the first time after the power of the water heater is turned on, the set temperature corresponding to the operation of the up switch for a plurality of times can be increased. (1) or (2) having the function of lowering the set temperature corresponding to the operation of the down switch
A hot water supply device according to item 1. (4) The temperature display has a function of displaying the temperature of the hot water normally supplied from the water heater and displaying the set temperature for the first time when the setting switch is pressed, in any one of (1) to (3). The hot water supply device as described. (5) The hot water supply apparatus according to any one of (1) to (4), which has a function of displaying a temperature setting only when the high temperature setting switch is pressed for a predetermined time or more.

[0005]

FIG. 1 is an external view of a remote controller according to an embodiment of the present invention. FIG. 3 shows a block diagram of a control device inside the remote controller 5. The inputs of the switches (1, 2, 3, 6) and the temperature display 4 are processed by the microcomputer. The temperature indicator 4 may be of any type as long as it can display numbers such as a two-digit seven-segment LED or a liquid crystal display. It also has an interface device for communicating the state of the switch and the state of temperature setting with the control device in the water heater.
FIG. 4 is a flowchart showing an input process of the high temperature setting switch 6 by the microcomputer. When the high temperature setting switch 6 is depressed and a timer in the microcomputer which detects the signal is operated by the microcomputer and the ON state continues for 2 seconds or more, the temperature display 4 displays a preset high temperature in the microcomputer. . Generally, a high temperature setting of 60 ° C. or 75 ° C. is suitably used. If the high temperature setting switch 6 is not continuously turned on for more than 2 seconds, the input of the switch is canceled. Further, the continuous ON time of the switch is preferably 1.5 to 2 seconds in consideration of usability and erroneous operation. When the high-temperature setting switch 6 is pressed again during the high-temperature setting display, the high-temperature display state is instantaneously released, and the temperature display before setting stored in the microcomputer is restored.

[0006]

FIG. 5 shows the principle of operation of a water heater according to an embodiment of the present invention. The water heater 30 is a gas water heater, and includes a gas pipe, a water pipe, a hot water pipe, and an AC100 (V) power supply 31.
Is connected. The water faucet 27 is mounted on the upper surface of the bathtub or on the bathroom wall.
9 or the shower 25 discharges hot water and the water side valve 24
When the valve is opened, water is discharged from the curran 29 or the shower 25. Switching of the water discharge between the curan 29 and the shower 25 is selected by a switching valve 26. Here, the operation of dropping hot water into the bathtub 28 will be described. The operation switch 1 of the remote controller 5 is depressed, and the desired temperature is set by the set temperature up switch 2 or the set temperature down switch 3. Control device 13 in water heater 30 connected to remote controller 5 enters a hot water supply standby state. When the passage to the curan 29 is selected by the switching valve 26 and the hot water side valve 23 is opened, the water heater 3
When water flows in from the water supply port 0 and the water flow is detected by the water amount sensor 10, the hot water supply fan 21 is operated, the safety gas solenoid valve 15 and the hot water supply gas solenoid valve 17 are opened, and the ignition device 20 is operated. To ignite the burner 14. Heat exchanger 22
The hot water whose heat has been exchanged is detected by the temperature detector 12 via the water proportional valve 11, and the hot water is discharged from the curan 29 of the faucet 27. The switching gas solenoid valves 18 and 19 and the gas proportional valve 16 so that the temperature is set by the remote controller 5.
Thus, the amount of gas and the number of combustion burners are selected, and the amount of combustion is controlled so that hot water at the set temperature is obtained. When the user wants to end the dropping into the bathtub 28, the user needs the hot water side valve 2.
3 is closed.

The high-temperature setting operation of the remote controller will be described. When the high-temperature setting switch 6 is depressed, the input port of the microcomputer detects the high level. ° C
Is displayed on the temperature indicator 4 and the data is sent to the control device 13 in the hot water supply device 30, and the control device 13 adjusts the number of burners and the gas amount so that the hot water can be discharged at 75 ° C. When the high temperature setting switch 6 is pressed again, the microcomputer port releases the high temperature setting at the moment when the High level is detected, and displays the temperature before the high temperature setting stored in the microcomputer on the temperature display 4.

[0008]

As described above, by providing a switch dedicated to high temperature setting on the remote controller, it is possible to improve the convenience of the temperature setting operation when hot water is supplied from a curan to a bath. A hot water supply device capable of ensuring safety against burns due to erroneous operation can be provided.

[Brief description of the drawings]

FIG. 1 is a top view of a remote controller showing an embodiment of the present invention.

FIG. 2 is a top view of a remote controller showing a conventional example.

FIG. 3 is a block diagram of an internal control device of a remote controller used in one embodiment of the present invention.

FIG. 4 is a flowchart of a detection sequence of a high temperature setting switch used in one embodiment of the present invention.

FIG. 5 is a schematic sectional view of a hot water supply apparatus used in one embodiment of the present invention.

[Explanation of symbols]

1. Operation switch 2. Hot water supply setting up switch 3. Hot water supply setting down switch 4. Temperature display 5. Remote control 6. High temperature setting switch 10. Water volume sensor 11. Water proportional valve 12. Temperature detector 13. Control device 14. Burner 15. Safety gas solenoid valve 16. Gas proportional valve 17. Hot water supply gas solenoid valve 18. Switching gas solenoid valve 19. Switching gas solenoid valve 20. Ignition device 21. Hot water supply fan 22. Heat exchanger 23. Hot water side valve 24. Water side valp 25. Shower 26. Switching valve 27. Faucet 28. Bathtub 29. Curran 30. Water heater 31. A
C100V power supply

Claims (5)

[Claims] 1. A water heater and a remote controller for controlling the operation of the water heater. The remote controller includes an operation switch for controlling the operation / stop of the water heater, and a controller for controlling hot water discharged from the water heater. A high temperature setting switch having a temperature display for displaying a set temperature and a setting switch for changing a set temperature displayed on the temperature display, and capable of performing a plurality of operations of the setting switch by one operation. Water heater. 2. The water heater according to claim 1, wherein the setting switch comprises an up switch for increasing the set temperature and a down switch for decreasing the set temperature. 3. When the high temperature setting switch is depressed once for the first time after the power of the water heater is turned on, the set temperature corresponding to the operation of the up switch for a plurality of times can be raised.
The hot water supply apparatus according to claim 1 or 2, wherein the hot water supply apparatus has a function of reducing a set temperature corresponding to a plurality of operations of the down switch. 4. The temperature display device according to claim 1, wherein the temperature display device has a function of displaying the temperature of the hot water normally supplied from the water heater and displaying the set temperature only when a setting switch is pressed. The hot water supply device as described. 5. A function for displaying a temperature setting only when the high temperature setting switch is pressed for a predetermined time or more.
4. The hot water supply device according to any one of 4.