JPH01266427A - Deficiency-in-capacity announcing device for hot water feeder - Google Patents

Abstract

PURPOSE:To report a reason why a feed hot water temperature is low to user, by a method wherein the temperature and an amount of water fed to a hot water feeder are detected, a feed hot water temperature obtained at maximum capacity is computed therefor, the compare it with a set temperature, and in the case of deficiency in capacity thereof, an alarm is issued for announcement. CONSTITUTION:The functions of a maximum hot water feed temperature computing means 8, a feed hot water set temperature detecting means 9, and a capacity and set temperature comparing means 10 are contained in a microcomputer 6. The maximum feed hot water temperature computing means 8 computes the maximum feed hot water temperature during maximum combustion of a hot water feeder from an income water temperature and an income water amount obtained by an income water temperature detecting means 4 and an income amount detecting means 5. The feed hot water set temperature detecting means 9 detects a feed hot water set temperature from an electric signal inputted from a feed hot water temperature set means 7. The capacity and set temperature comparing means 10 compares a maximum feed hot water temperature obtained by the maximum feed hot water temperature computing means 8 with a set temperature obtained by the feed hot water set temperature detecting means 9. A deficiency-in-capacity announcing means 11 inputs a signal from the capacity and set temperature comparing means 10 to announce a deficiency in capacity when capacity is deficient.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an insufficiency notification device for a water heater that sets the hot water temperature and controls the busy combustion capacity so that the hot water temperature reaches the set hot water temperature.

BACKGROUND OF THE INVENTION Recent water heaters have a function of controlling combustion capacity to maintain a set hot water temperature.

Problems to be Solved by the Invention However, with the conventional configuration, when the incoming water temperature is too low or the amount of incoming water is too large, such as in winter, even if the combustion is performed at maximum capacity, the ability to raise the hot water temperature to the set temperature is insufficient, and the hot water is turned off. Users sometimes complained when the temperature was low.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, it is an object of the present invention to notify the user when the capacity does not meet the set temperature, and to inform the user of the reason why the hot water temperature is low.

Means for Solving the Problems The insufficiency alerting device for a water heater of the present invention comprises: an incoming water temperature detecting means connected to the water heater; an incoming water amount detecting means supplied to the hot water tap; and the incoming water temperature detecting means. Maximum hot water output temperature calculation means for calculating the maximum hot water output temperature obtained at the maximum capacity of the water heater from the incoming water temperature and the amount of water obtained from the water input amount detection means; capability/set temperature comparison means for comparing the highest hot water outlet temperature obtained by the hot water outlet temperature with the set temperature obtained from the outlet hot water set temperature detection means; and a capacity insufficiency alarm that uses the signal from the capacity/set temperature comparison means as an input signal to notify a lack of capacity. The device is configured to notify the user when the capacity is not sufficient to meet the set flow rate, and to inform the user of the reason why the hot water temperature is low.

Function The present invention calculates the maximum hot water temperature that can be obtained at the maximum capacity of the appliance from the signals obtained from the incoming water temperature detection means and the incoming water usage detection means of the water heater, and sets the hot water setting temperature to the maximum hot water temperature obtained by the calculation. If it exceeds the limit, an insufficiency signal is output to the insufficiency notification means to notify the insufficiency.

Example FIG. 1 is a block diagram showing an embodiment of the present invention.

1 is a water heater main body, 2 is an inlet pipe that supplies water to the water heater main body 1, and 3 is a hot water outlet pipe. An inlet water temperature detection means 4 and an inflow water amount detection means 5 are attached to the inlet pipe 2.
Electric signals obtained by converting the temperature and amount of water supplied to the water heater body 1 through the water heater body 1 are input to a control device 6 in the water heater body. The output signal from the inflow water amount detection means 5 is a pulse signal output at every constant flow rate.

Reference numeral 7 denotes a hot water outlet temperature setting means for setting the hot water outlet temperature.

The control device 6 includes a maximum hot water temperature calculation means 8 that calculates the maximum hot water temperature at the time of maximum combustion of the water heater from the temperature and amount of incoming water obtained from the incoming water quality detection means 4 and the incoming water amount detection means 5; The hot water outlet temperature detection means 9 detects the hot water outlet temperature setting from the electric signal inputted from the hot water outlet temperature setting means 7, the highest hot water outlet temperature obtained from the highest hot water outlet temperature calculation means 8, and the set temperature obtained from the hot water outlet temperature setting means 9. The capacity/set temperature comparing means 10 is configured to compare the capacity/set temperature, and the capacity/set temperature notifying means 11 is configured to use the signal from the capacity/set temperature comparing means 10 as an input signal to notify of a lack of capacity.

FIG. 2 shows an example of a specific circuit of the control device 6. The control device 6 is composed of a microcomputer 14 and peripheral circuits. The microcomputer 14 shown here includes a CPU, ROM, and RAM.

It is a so-called one-chip microcomputer having an input/output section.

The microcomputer 14 includes the functions of a maximum hot water temperature calculation means 8, a set hot water temperature detection means 9, and a capacity/set temperature comparison means 10.

The incoming water temperature detection means 4 and the outgoing water temperature setting means 7 are connected to an input section of a microcomputer 14 via an analog multiplexer 12 and an A/D converter 13. As a result, the signals from the inlet water temperature detection means 4 attached to the inlet pipe and the output hot water temperature setting means 7 are each converted into binary codes and read into the microcomputer 14.

Reference numeral 11 denotes an insufficiency reporting means, which is composed of an LED 16 for indicating insufficiency and a transistor 15 for driving the LED.

The microcomputer 14 calculates the maximum blackness r of hot water at the time of maximum combustion from the incoming water temperature obtained from the incoming water temperature detecting means 4 and the amount of incoming water obtained from the incoming water amount detecting means 5.

Assuming that the incoming water temperature is Tin°C, the amount of incoming water is Q*n717 minutes, and the capacity of the appliance is 25 degat Mr, 7 minutes, the outlet temperature To of the appliance at maximum combustion is To''Tin + 25 X G ÷ Qin. To is compared with the set hot water temperature TS read from the hot water tap temperature setting means 7, and if TS>To, the microcomputer 14H) outputs a drive signal to the run transistor 15.The transistor 15 receives the signal from the microcomputer 14 and becomes activated. The LED 16 for displaying money is driven to notify of a lack of ability.

Is the invention more effective than the invention? Calculates the maximum hot water temperature at maximum combustion of the appliance from the temperature and water input amount, compares it with the set hot water temperature, and notifies the user of insufficient capacity when the hot water set temperature exceeds the maximum hot water temperature. It is possible to report a lack of ability.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing one embodiment of the present invention, and FIG. 2 is a circuit diagram of the main part of this embodiment. 4...Incoming water temperature detection means, 5...Incoming water amount detection means, 8...Maximum hot water output altitude calculation means, 9
・・・・・・Hot water setting temperature detection means, 10...
Capacity/set temperature comparison means, 11... Insufficient capacity reporting means, 16... LED for indicating insufficiency. Name of agent: Patent attorney Toshio Nakao and 1 other list
1 figure

Claims (1)

[Claims] The maximum capacity of the water heater is determined from the incoming water temperature and amount obtained from the incoming water humidity detecting means, the incoming water amount detecting means, the incoming water temperature detecting means, and the incoming water amount detecting means. a maximum hot water temperature calculation means for calculating the maximum hot water temperature obtained by the hot water supply temperature calculation means, a hot water supply setting temperature detection means, and a comparison between the maximum hot water supply temperature obtained from the maximum hot water supply temperature calculation means and the set temperature obtained from the hot water supply temperature setting detection means. A capacity deficiency notification device for a water heater, comprising capacity/set temperature comparison means for comparing the capacity and set temperature, and capacity deficiency notification unit for notifying a capacity shortage by using a signal from the capacity/set temperature comparison unit as an input signal.