JPH023897B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is primarily a capacity switching device that is applied to remote-controlled gas water heaters, gas bath kettles, and other water heaters equipped with a capacity switching operator. Regarding.

(Prior art) Conventionally, this type of device opens and closes a valve for specifying hot water temperature, which is an operator installed in a water passage of a heat exchanger, and adjusts the temperature according to the number of pulsations of the water flow accompanying the opening/closing operation. It is known that hot water at a desired temperature can be obtained from the faucet of the flow path by controlling a gas flow control valve installed in the gas supply path to the burner that heats the exchanger (Japanese Unexamined Patent Application Publication No. 1983-1992). (Refer to Publication No. 55346).

(Problems to be Solved by the Invention) However, according to the above-mentioned conventional method, the hot water temperature is set by opening and closing the opening/closing valve, which makes the setting operation cumbersome and requires a large number of opening/closing valves to be opened and closed within a short period of time. If you operate it twice, the water flow detection device that detects the number of pulsations in the water flow will not be able to track the number of pulsations due to water inertia and hysteresis characteristics, and due to the opening and closing of other faucets,
Malfunctions sometimes occur, and as a result, the gas flow control valve becomes uncontrollable, resulting in the inconvenience of not being able to obtain hot water at a desired temperature.

(Means for Solving the Problems) The present invention aims to provide an apparatus that does not have the above-mentioned disadvantages, that is, an inexpensive and highly reliable apparatus, in which the amount of gas interposed in the twisting material supply path to the burner is In a capacity switching system for a water heater in which a control valve is controlled by a capacity switching operator so that hot water at a desired temperature can be obtained from a faucet at the downstream end of a passageway of a heat exchanger heated by the burner, An ultrasonic transmitter is provided in the vicinity of the faucet of the water passageway and generates an ultrasonic signal for commanding the hot water temperature by the operation of the operator. An ultrasonic receiver is provided that receives a command signal via water existing in the water passage, and the opening degree of the gas amount control valve is changed by an output signal from the ultrasonic receiver in accordance with the command signal. It is characterized by the following.

(Function) The present invention has the above-mentioned configuration, and when a command signal for the outlet temperature is issued from the ultrasonic transmitter by operating the operator, this signal is transmitted to the ultrasonic wave via the water in the water passage of the heat exchanger. received by a sound wave receiver,
An output signal corresponding to the command signal is generated from this ultrasonic receiver, and the opening degree of the gas amount control valve and the amount of twisting of the burner, that is, the capacity of the water heater, are controlled.
You can get the desired hot water from the faucet.

(Example) Next, the present invention will be explained based on the illustrated example.

1 and 2, reference numeral 1 indicates a water heater main body, and the main body 1 includes a heat exchanger 3 having a water passage 2 consisting of an upstream water supply pipe 2a and a downstream hot water outlet pipe 2b, A burner 4 for heating the heat exchanger 3 is provided.

A gas flow control valve 6 and an electromagnetic on-off valve 7 connected in series with the gas flow control valve 6 are interposed in the gas flow passage 5 serving as a twisting material supply path to the burner 4 .

The gas amount control valve 6 is composed of an electromagnetic proportional valve, and is of a type that ensures a minimum gas flow rate, for example, by a bypass passage or the like, even when the electromagnetic on-off valve 7 is opened, even if it is closed. .

Further, 8 indicates a faucet attached to the downstream end of the water passage 2, that is, the tip of the hot water tap pipe 2b;
An ultrasonic transmitter 9 was provided near the faucet 8. The ultrasonic transmitter 9 is equipped with an operator 10 for switching the capacity, and a timer (not shown) that operates for a certain period of time when the operator 10 is operated. A, B, and C, when push button switch A is pressed, one ultrasonic pulse signal is generated during the operation of time t of the timer as shown in Figure 3a, and when push button switch B is pressed, the third ultrasonic pulse signal is generated. Two ultrasonic pulse signals are generated as shown in FIG. 3B, and when push button C is pressed, three ultrasonic pulse signals are generated as shown in FIG. 3C.

When one of these ultrasonic pulse signals is generated, it becomes a command signal to set the hot water outlet temperature to 30℃, for example, when two ultrasonic pulse signals are generated, it becomes a command signal to set the hot water outlet temperature to 40℃, and when three ultrasonic pulse signals are generated, for example, the hot water outlet temperature is set to 40℃. temperature 80
It is now a command signal to set the temperature to ℃.

The ultrasonic receiver 11 that receives the command signal from the ultrasonic transmitter 9 is provided at the middle of the water passage 2. In the illustrated embodiment, the ultrasonic receiver 11 receives the command signal from the ultrasonic transmitter 9.
The command signal was made to pass through the water in the water passageway 2 so as not to be attenuated.

Further, the gas amount control valve 6 is controlled by the control signal circuit 1 by the ultrasonic transmitter 9 and the ultrasonic receiver 11.
The system was configured to respond via 2.

As detailed in FIG. 2, the control signal circuit 12 connects three mutually parallel signals to the operator 10 by means of a capacity setting changeover switch 13 interlocked with the ultrasonic transmitter 9 and the ultrasonic receiver 11. resistance 14,1
5, 16 is selected, and the voltage between the terminals of the selected resistor is operationally amplified by the operational amplifier 17, converted into a current form, and inputted to the base of the transistor 18. The current is generated on the collector side of the transistor 18.

The current flowing to the collector side is transferred to the gas passage 1
5, the gas amount control valve 6, which is an electromagnetic proportional valve operating solenoid 6a, is supplied with the gas, so that the opening of the electromagnetic proportional valve and the amount of twisting of the burner 4, that is, the capacity of the water heater, are proportionally controlled. .

In FIG. 2, reference numeral 19 indicates an adjustment circuit corresponding to the gas type, and the adjustment circuit 19 includes three other resistors 20, 21, 22 in parallel with each other, and these resistors 20, 21, 22,
22, each resistor 20, 21, 22 is used for city gas, natural gas, or propane gas, and by switching the switch 23, the positive side of the operational amplifier 17 is selected. The voltage applied to the input terminal of the gas is set to a value corresponding to the type of gas. Further, 24 and 25 indicate coarse adjustment resistors and fine adjustment resistors for compensating for mechanical errors, such as variations in electromagnetic proportional valves, 26 indicates a power switch, and 27 indicates a power lamp.

The power switch 26 and power lamp 27 shown in FIG. 2 are constructed to be incorporated into the ultrasonic transmitter 9 shown in FIG.

In this case, when the push button switch that is the operator 10 is pressed, a timer is started, and when the push button switch A is pressed, one ultrasonic wave is emitted from the ultrasonic transmitter 9 during the operation of the timer for a certain period of time. A pulse is generated, which is received by the ultrasonic receiver 11 through the water in the water passage 2 of the heat exchanger 3, and is sent to the changeover switch 13 of the control signal circuit 12 in the water heater body 1.
selects the leftmost 30°C resistor 13, and the opening degree of the electromagnetic proportional valve is changed according to the voltage between the terminals of the resistor 14, and the flow from the faucet 8 at the downstream end of the water passage 2 of the heat exchanger 3
You can get hot water at 30℃.

Also, if push button switch B is pressed or push button switch C is pressed, push button switch A is pressed.
The same operation as when the faucet 8 is pressed is performed, and the faucet 8
You can get hot water at 40°C or 80°C.

In the above embodiment, different numbers of ultrasonic pulse signals are generated from the ultrasonic transmitter 9, but it is also possible to generate continuous ultrasonic signals for different times. The ultrasonic receiver 11 is equipped with a timer for measuring the reception time, and an output signal is generated from the ultrasonic receiver 11 to set the tap water temperature to, for example, 30°C, 40°C, or 80°C depending on the reception time. All you have to do is make it so.

Incidentally, since the above-mentioned embodiment cannot cope with changes in water temperature due to seasonal changes, in order to compensate for this, the embodiment shown in FIG.

(Effects of the Invention) According to the present invention, an ultrasonic transmitter equipped with an operator for setting the hot water temperature is provided near the faucet of the water passage of the heat exchanger, and an ultrasonic transmitter is provided in the middle of the water passage. is provided with an ultrasonic receiver that receives a command signal of the hot water temperature from the ultrasonic transmitter, and a twisting material of a burner that heats the heat exchanger by an output signal corresponding to the command signal from the ultrasonic transmitter. By changing the opening degree of the gas flow control valve installed in the supply path, hot water at the desired temperature can be obtained from the faucet.Therefore, there is no troublesome operation or malfunction like in the conventional device, and the system is fast. In other words, an inexpensive and highly reliable device can be provided.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one example of implementation of the present invention,
Fig. 2 is a circuit diagram showing details of the control signal circuit, Fig. 3 is an explanatory diagram showing an example of a command signal output from an ultrasonic oscillator, and Fig. 4 shows a modification of Fig. 2. It is a circuit diagram. 2... Water passageway, 3... Heat exchanger, 4... Burner, 6... Gas amount control valve, 8... Faucet, 9... Ultrasonic transmitter, 10... Operator, 11... Ultrasonic wave receiver.

[Claims]

1 In gas instantaneous water heaters, the settings in the setting section of the external controller are transmitted to the internal controller via binary communication to control the operation of the water heater, and the settings are transmitted from the external controller to the internal controller. A means for storing the setting contents to be set and retaining the memory without being reset even when the operation switch is turned on, and a means for storing the final data when the operation switch is turned off, which is held in the means, when the operation switch is turned off. A gas instantaneous water heater characterized in that a transmitting circuit is provided for transmitting data to an external controller when the water is turned on, and a receiving circuit is provided for the external controller to receive data transferred from the in-machine controller.