JP2911361B2 - Water heater remote control system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control system for a water heater.

[0002]

2. Description of the Related Art Conventionally, the following remote control systems for water heaters are known. The water heater remote control system includes a water supply pipe, a heat exchanger, and a heat exchange channel that are connected in series, a hot water tap attached to the outlet of the water supply pipe, a water flow sensor that detects the amount of water flowing through the heat exchange water path, and heat. A gas burner for heating the exchanger, a thermistor for detecting tap water and supply water temperature, a proportional valve for controlling the amount of gas supplied to the gas burner, and a remote control communication circuit that converts operating information such as set temperature and combustion status into downstream digital signals To the main unit communication circuit that demodulates the operation command such as setting temperature change from the upstream digital signal sent from the remote controller communication circuit, and to make the tap water temperature the set temperature based on the detected water supply temperature and the detected water supply amount. A water heater main unit equipped with a main unit microcomputer that controls the proportional valve, a set of push button switches for instructing raising and lowering of the set temperature, and remote control A remote control microcomputer that sends the operation information to a display signal while transmitting it to the control side communication circuit, and converts the operation command into an upstream digital signal and sends it to the main unit communication circuit, and also sends the downstream digital signal sent from the main body communication circuit. A remote control communication circuit for demodulating operation information from a signal; a remote control including a display for displaying the operation information based on the display signal; and a two-wire wire connecting the water heater main body and the remote control. . Note that there may be one hot water tap or remote control, or a plurality of remote controls.

[0003]

However, it has been found that the conventional remote control system for a water heater has the following problems.

(A) While opening a hot water tap and taking a shower or washing his / her head, a user gropingly pushes a push button switch of a remote control installed in a bathroom in order to change the temperature of hot water. If the wrong push button switch is pressed by mistake during operation, the temperature of the discharged hot water changes in the opposite direction to the desired one, and the user feels discomfort.

(A) When a child or the like mischieves and presses the push button switch of the remote controller while the hot water tap is opened and the hot water is being used, the temperature of the hot water to be discharged is changed, and the user is instructed. I'm surprised.

(C) A plurality of hot water taps (for example, kitchen,
In the case where there is a bathroom and a shower room, and a remote control is also provided at a plurality of places (for example, a kitchen, a bathroom and a shower room), for example, while washing in the kitchen (setting temperature of 50 ° C.), If the user changes the set hot water temperature (42 ° C.) to use the shower, the temperature of hot water discharged from the kitchen faucet drops (50 ° C. → 42
° C), causing discomfort.

It is an object of the present invention to provide a remote control system for a water heater in which the set hot water temperature does not change even when a set hot water temperature changer of a remote controller is operated while using hot water.

[0008]

In order to solve the above-mentioned problems,
The present invention employs the following configuration. (1) a water supply pipe-heat exchanger-a heat exchange water passage formed by connecting a tapping pipe, a hot water tap provided at an outlet of the tapping pipe, a water flow sensor for detecting an amount of water flowing through the heat exchange water passage, and the heat exchange. A heater for heating the heater, a feed water temperature sensor for detecting a feed water temperature, a tap water temperature sensor for detecting a tap water temperature, an actuator for operating the heating amount of the heater, the water amount, or both the heating amount and the water amount, While converting the operation information such as the set temperature to a down-converted digital signal and sending it to the remote-control-side communication circuit described later,
A main body communication circuit that demodulates an operation command such as a set temperature change from an upstream digital signal sent from the remote control communication circuit, and, when the detected water amount is equal to or more than a predetermined value, activates the heater, and detects the detected supply water temperature and Based on the detected water volume,
A water heater main body including a main body microcomputer for controlling the actuator such that the tap water temperature is maintained at a set temperature, and a set hot water temperature for sending an operation signal to a remote control microcomputer to be described later when a set temperature changing operation is performed. A changer, a remote control microcomputer for transmitting operation commands such as a change in set temperature to a remote control communication circuit, which will be described later, and converting the operation information into a display signal. And a remote control communication circuit that demodulates operation information from the downstream digital signal sent from the main unit communication circuit.
A water heater comprising: one or more remote controllers; and a communication line connecting the main body side communication circuit and the remote control side communication circuit, the display including: a display for displaying the operation information based on the display signal . in the remote control system, the present
The body-side microcomputer controls the set temperature and the detected power supply.
And determines the predetermined value based on the water temperature, the detection amount of water only if less than a predetermined value, to change the setting temperature on the basis of the operation command of the set temperature changes demodulated.

(2) A water supply pipe-a heat exchanger pipe having a heat exchanger-a hot water supply pipe, a hot water supply pipe provided at an outlet of the hot water supply pipe, the hot water supply pipe or the hot water supply pipe. A water flow sensor for detecting the amount of flowing water, a heater for heating the heat exchanger, a feed water temperature sensor for detecting the feed water temperature, a tap water temperature sensor for detecting the tap water temperature, a heating amount of the heater, and passing through the feed pipe. Actuator that operates the ratio of the amount of water to flow, and the ratio of the amount of heat exchange water that passes through the heat exchanger and the amount of bypass water that reaches the tapping pipe without passing through the heat exchanger pipe, and operation information such as set temperature is converted to a digital signal. Converted and sent to the remote control communication circuit to be described later, and the main unit communication circuit that demodulates the operation command such as setting temperature change from the upstream digital signal sent from the remote control communication circuit, and when the detected water amount is a predetermined value or more , The heater And a water heater main body including a main body microcomputer for controlling the actuator based on the detected feed water temperature and the detected water amount so that the tap water temperature is maintained at the set temperature. A setting hot water temperature changer for sending a signal to a remote control microcomputer to be described later, an operation command for changing the set temperature, etc. to a remote control communication circuit to be described later, and a remote control microcomputer for converting operation information into a display signal; While converting the operation command into an upstream digital signal and sending it to the main body side communication circuit, the remote control side communication circuit demodulating operation information from the downstream digital signal sent from the main body side communication circuit, and Equipped with a display for displaying operation information, one or more remote controls, and the main body side communication circuit Water heater remote control having a communication line for connecting the remote control-side communication circuit sheet
In the stem, the main body side microcomputer comprises:
The predetermined value is determined based on the set temperature and the detected feedwater temperature.
With a constant, only when the detection amount of water is less than a predetermined value,
The microcomputer on the main body changes the set temperature based on the demodulated operation command for changing the set temperature.

[0010] (3) has the configuration of the above (1) or (2), before
The setting hot water temperature changer switches contacts when it is pressed.
This is an unlocking push button switch.

[0011]

[0012]

[Action] [Claim 1] It is detected that the microcomputer on the main body side does not change the set temperature.
Set a predetermined value for the water output (the amount of water detected to activate the heater).
Determined based on constant temperature and detected feedwater temperature. (Changing the Set Temperature) When changing the set temperature, first, the hot water tap is squeezed or closed, and the amount of water flowing through the heat exchange water passage is reduced to less than a predetermined value.
Next, the set hot water temperature changer of the remote control is operated to send an operation signal to the remote control microcomputer.

The microcomputer on the remote control side converts an operation command relating to the operation of changing the set temperature into an upstream digital signal and sends it to a communication circuit on the main body side through a communication line. The main-unit-side communication circuit demodulates an operation command related to a set temperature change from the upstream digital signal.

The main body microcomputer changes the set temperature based on the operation command demodulated by the main body communication circuit. The main-unit communication circuit converts the operation information associated with the changed set temperature into a down-converted digital signal, and transmits the digital signal to the remote control-side communication circuit via a communication line.

The remote control communication circuit demodulates operation information relating to the change of the set temperature from the downstream digital signal. The microcomputer on the remote control side converts the operation information into a display signal, and the display unit displays the operation information (the changed set temperature).

(When hot water is supplied) The hot water tap is opened and the amount of water flowing through the heat exchange water channel is set to a predetermined value or more. In this state, when the user operates the set hot water temperature changer, the microcomputer on the remote control side converts the operation command relating to the set temperature change operation into an upstream digital signal and sends it to the communication circuit on the main body side through a communication line, and the communication circuit on the main body side Demodulates the operation command relating to the change of the set temperature from the upstream digital signal, but the main body microcomputer does not change the set temperature because the detected water amount is equal to or more than the predetermined value.

The microcomputer on the main body operates the heater and, based on the detected supply water temperature and the detected water amount,
The actuator is controlled so that the tapping temperature is maintained at the set temperature. In addition, the actuator has a heating amount of the heater,
Alternatively, the amount of water flowing through the heat exchange water channel, or both the amount of heating and the amount of water are operated.

[Claim 2] It is detected that the microcomputer on the main body side does not change the set temperature.
Set a predetermined value for the water output (the amount of water detected to activate the heater).
Determined based on constant temperature and detected feedwater temperature. (Changing the Set Temperature) When changing the set temperature, first, the hot water tap is squeezed or closed, and the amount of water flowing through the water supply pipe or the tap water pipe is set to be less than a predetermined value. By operating the set hot water temperature changer of the remote controller, an operation signal is transmitted to the microcomputer on the remote controller side.

The microcomputer on the remote control side converts an operation command relating to the set temperature changing operation into an up digital signal and sends it to a communication circuit on the main body side through a communication line. The main-unit-side communication circuit demodulates an operation command related to a set temperature change from the upstream digital signal.

The main body microcomputer changes the set temperature based on the operation command demodulated by the main body communication circuit. The main body side communication circuit converts the operation information relating to the changed set temperature into a downstream digital signal, and sends out the digital signal to the remote control side communication circuit through a communication line.

The communication circuit on the remote control side demodulates the operation information relating to the change of the set temperature from the downstream digital signal. The microcomputer on the remote control side converts the operation information into a display signal, and the display unit displays the operation information (the changed set temperature).

(When hot water is supplied) The hot water tap is opened and the amount of water is increased to a predetermined value or more. In this state, the user operates the set hot water temperature changer, and the microcomputer on the remote control side converts the operation command relating to the set temperature change operation into an up digital signal, sends it out to the communication circuit on the main body side through a communication line, and communicates on the main body side. Although the circuit demodulates the operation command related to the set temperature change from the upstream digital signal, the main body side microcomputer does not change the set temperature because the detected water amount is equal to or more than the predetermined value.

The microcomputer on the main body operates the heater and, based on the detected supply water temperature and the detected water amount,
The actuator is controlled so that the tapping temperature is maintained at the set temperature. The actuator controls the heating amount of the heater, the amount of water passing through the water supply pipe, and the ratio between the amount of heat exchange water passing through the heat exchanger and the amount of bypass water reaching the tapping pipe without passing through the heat exchanger. It is.

[Claim 3] When changing the set temperature, the hot water tap is squeezed or closed.
To set the water volume below the set value, and press the pushbutton switch.
Operate with pressure.

[0025]

[0026]

【The invention's effect】

[Claim 1] The user operates the set hot water temperature changer of the remote controller during hot water supply in which the amount of water flowing through the heat exchange water channel is equal to or more than a predetermined value and the heater is operating, and the operation related to the set temperature change operation is performed. The operation command is converted into an upstream digital signal and transmitted to the communication circuit on the main body side, and the microcomputer on the main body side does not change the set temperature even if the communication circuit on the main body side demodulates the operation command related to the change of the set temperature from the upstream digital signal.

That is, while the hot-water tap is opened and hot water is being discharged, the temperature of the hot water to be discharged cannot be changed. Therefore, the erroneous operation of the set hot-water temperature changer does not occur, and the user feels discomfort. And does not cause confusion. Also activate the heater
(Based on the demodulated set temperature change operation command)
The microcomputer does not change the set temperature
Is determined based on the set temperature and the detected feedwater temperature.
Overheating of the heat exchanger,
Boiling water passing or hot water temperature is higher than the set temperature
It is possible to prevent the occurrence of troubles such as inconvenience.

[Claim 2] During the hot water supply in which the amount of water flowing through the water supply pipe or the tap water pipe is equal to or more than a predetermined value and the heater is operating, the user operates the set hot water temperature changer of the remote controller to set the water temperature. The operation command related to the temperature change operation is converted into an upstream digital signal and sent to the main body communication circuit, and the main body microcomputer is set even if the main body communication circuit demodulates the operation command related to the set temperature change from the upstream digital signal. Do not change the temperature.

That is, while the hot-water tap is opened and hot water is being discharged, the temperature of the hot water to be discharged cannot be changed, so that the erroneous operation of the set hot-water temperature changer does not occur and the user feels discomfort. And does not cause confusion. Also activate the heater
(Based on the demodulated set temperature change operation command)
The microcomputer does not change the set temperature
Is determined based on the set temperature and the detected feedwater temperature.
Overheating of the heat exchanger,
Boiling water passing or hot water temperature is higher than the set temperature
It is possible to prevent the occurrence of troubles such as inconvenience.

[Claim 3] With the hot water tap squeezed or closed, the water volume is reduced below a predetermined value.
And press the pushbutton switch to set the temperature.
Can be changed, and the set temperature changing operation is easy.
When the set hot water temperature changer switches contacts when pressing
Because it is a lock type push button switch,
When the change operation is invalidated, there is no sense of incongruity.

[0031]

[0032]

[0033]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention (corresponding to claims 2 and 3 )
Will be described with reference to FIGS. As shown in the figure, a remote control system A for a water heater is installed in a water heater main body K installed outdoors, a main remote controller M installed in a kitchen, a waterproof remote controller F installed in a bathroom, and installed in a shower room. It consists of a waterproof sub-remote S and a water heater main body K-a two-wire wire N connecting each remote control.

The water heater main body K shown in FIG.
Heat exchanger tube 112 having heat exchanger 112a-tapping tube 1
13 and a hot water tap 1136,
1137, 1138, a water amount sensor 116, a gas burner 12, and a tap water temperature thermistor 118 for detecting tap water temperature
A feed water temperature thermistor 119 for detecting a feed water temperature; a switching solenoid valve 131, a governor proportional solenoid valve 132, and an electric water flow control device 133 with a distributor as actuators; a main body side communication circuit 14; Fifteen
And the like.

The water supply pipe 111 has an upstream side connected to a water supply system (not shown) and a downstream side connected to the electric water flow controller 1 with a distributor.
33 are connected to the entrance. In this water supply pipe 111,
A water filter / water tap m from the upstream side, a water amount sensor 116,
And a feedwater temperature thermistor 119.

The heat exchanger tube 112 has an upstream side connected to one outlet of the electric water flow controller 133 with a distributor, and a downstream side connected to the mixer 1133. The heat exchanger 112a located in the middle is connected to the combustion cylinder 1 above the gas burner 12.
Heats water passing through the interior of the apparatus.

The electric water flow control device 133 with the distributor is provided with a water flow amount passing through the water supply pipe 111, a heat exchange water amount passing through the heat exchanger pipe 112, and a hot water supply pipe 113 without passing through the heat exchanger pipe 112.
This is a device for controlling the ratio of the amount of bypass water flowing through the bypass pipe 114 to the bypass pipe 114.

The upstream side of the bypass pipe 114 is connected to the other outlet of the electric water flow controller with distributor 133, and the downstream side is connected to the mixer 1133.

The tapping tube 113 has a mixer 1133 on the upstream side.
, The hot water thermistor 118, an overpressure safety valve and water tap 1135, and hot water taps 1136 and 1137.
1138 are sequentially provided.

The mixer 1133 mixes the water that has passed through the bypass pipe 114 with the hot water that has been heated by the heat exchanger pipe 112 to increase the temperature, and has a substantially uniform temperature.
The mixer 1133 is provided with a water drain plug 1132 and a freeze prevention heater 1134.

The hot water tap 1136 is a hot water tap for adjusting the amount of hot water discharged from a faucet provided in the kitchen. Hot water tap 1137 is a hot water tap for adjusting the amount of hot water discharged from a faucet provided in the bathroom. Further, a hot water tap 1138 is a hot water tap for adjusting an amount of hot water discharged from a shower head provided in a shower room.

The water amount sensor 116 is of an impeller type and detects the amount of water flowing through the water supply pipe 111.

The gas burner 12 of the two-stage switching type has a combustion cylinder 1 to which secondary air is sent by a combustion fan 122.
The gas is supplied by a gas pipe 121 and is forcibly burned. This gas pipe 121 has an original solenoid valve 1
211, governor proportional solenoid valve 132, gas solenoid valve 121
2, and a switching solenoid valve 131 are provided.

Reference numeral 1201 denotes an ignition electrode; 1202, an igniter; 1203, a frame rod for detecting a combustion flame; 1204, a thermal fuse; 1205, a residual fire safety device;

The tap water temperature thermistor 118 detects the tap water temperature, and the feed water temperature sensor detects the feed water temperature.
Further, the can body thermistor 1131 is provided to detect boiling of water passing through the heat exchanger 112a.

The switching solenoid valve 131 switches the gas supply amount to the gas burner 12 in two stages by opening (energizing) and closing (non-energizing) the valve.

The governor proportional solenoid valve 132 has an opening corresponding to the amount of current supplied, and continuously varies the amount of gas flowing through the gas pipe 121.

The main body communication circuit 14 shown in FIG. 2 converts the operating information relating to the presence / absence of combustion, the one with priority, whether or not the operation is in progress, and the set temperature into a digital down signal Dd, and the two-wire N Via the remote controller side communication circuits 21, 31, 41
To the remote control side communication circuits 21, 31, 41
Demodulated from the upstream digital signal Du sent from the controller, the operation command relating to the operation start / stop instruction, the priority shift instruction, and the set temperature change instruction.

When the power cord of the water heater body is plugged into the outlet, the main body side microcomputer 15 is supplied with operating power and starts operating. Based on the following equation, the fire extinguishing water amount W _OFF , the differential Water volume D
if and the ignition water amount W _ON are obtained.

Fire extinguishing water amount W _OFF = 64 / (set temperature T _SET
-Detected supply water temperature T _IN ) 64: Q _IN × 0.85 (kcal / min); fixed value However, fire extinguishing water amount W _OFF ≧ 2.0 (l / min)

Ignition water amount W _ON = fire extinguishing water amount W _OFF + differential water amount Dif However, if (set temperature T _SET −detected water supply temperature T _IN ) ≦ 0, no ignition is performed. However, ignition water amount W _ON ≧ 2.7 (l / min)

Differential water amount Dif = 128 /
(T _SET -T _IN ) ² 128: Qmin × 0.85 × 2 (kcal / min);
Fixed value However, differential water amount Dif ≧ 0.7 (l / m
in)

The detected water amount W is equal to the ignition water amount W._ONMore than
In this case, the combustion fan 122 is instructed to energize and the gas burner 12
And the detected feed water temperature T_INAnd detection hot water
Warm T _outHot water temperature T based on_outIs the set temperature T_SETTo
Switching solenoid valve 131, governor proportional solenoid valve to be maintained
132 and the electric water flow controller 133 with a distributor.
You.

When the priority change operation is performed by the remote controller when the detected water amount W is less than the ignition water amount W _ON , the main body side microcomputer 15 changes the priority based on the demodulated priority change operation command. Then, rewrite the data in the E ² PROM.

Further, the main body side microcomputer 15
Is treated independently two types of set temperature _{T SET 0, T SE T 1} , the detected water amount W performs the set temperature changes the remote control in the case of less than the ignition water W _ON, the set temperature changes demodulated Based on the operation command, the set temperature on the priority side is changed, and the data in the memory 150 is rewritten. The set temperature T _SET
0 (37 ° C. to 55 ° C.) can be changed by the main remote controller M, and the set temperature T _{SET 1} (37 ° C. to 50 ° C.) can be changed by the remote controller F or the sub remote controller S.

The main remote controller M includes a remote controller communication circuit 21, push button switches 22 and 23 for instructing to change the set temperature, an operation switch 24 for instructing start and stop of operation, and a remote controller microcomputer 25.
, A display circuit 26, an operation lamp 261, a priority lamp 262, a hot water temperature indicator 263, and a combustion lamp 264.

The remote-control-side communication circuit 21 converts an operation command, such as a change in set temperature, start / stop of operation, or a change in priority, into an upstream digital signal Du, and converts the operation command into the main body-side communication circuit 14 via the two-wire N. And demodulates the operation information from the downstream digital signal Dd sent from the communication circuit 14 on the main body side and sends it to the microcomputer 25 on the remote control side.

The push-button switches 22 and 23 are unlock-type push-button switches whose contacts switch to a closed state during the operation when the push operation is performed. When the set temperature change operation is performed, the operation signals 220 and 230 are generated. It is sent to the remote control microcomputer 25 described later.

The operation switch 24 is an unlocking push button switch in which the contact is switched to a closed state during operation when a pressing operation is performed. When the pressing operation is performed, an operation signal 240 generates a remote control microcomputer 25 described later. Sent to

The microcomputer 25 on the remote controller side
The operation command for changing the set temperature and starting / stopping the operation is sent to the remote control communication circuit 21, and the operation information demodulated by the remote control communication circuit 21 is converted into a display signal 250.

The operation lamp 261 is a backlight that lights up during operation, the priority lamp 262 is an LED that lights up when the main remote controller M is on the priority side, and the hot water temperature indicator 263 displays the set temperature T _{SET 0} or the set temperature T _{SET 1} . The seven-segment LED and the combustion lamp 264 are indicated by numerical values.
Is an LED that lights up when in a combustion state.

The remote controller F and the sub remote controller S include remote controller communication circuits 31 and 41, priority switches 30 and 40 for shifting the priority, and push button switches 32, 33 and 42 for instructing to change the set temperature. 43, operation switches 34 and 44 for instructing start and stop of operation,
Remote control microcomputers 35 and 45, display circuits 36 and 46, operation lamps 361 and 461, priority lamps 362 and 462, hot water temperature indicators 363 and 463,
And combustion lamps 364, 464.

The remote-control-side communication circuits 31 and 41 convert an operation command, such as a change in set temperature, start / stop of operation, or change of priority, into an upstream digital signal Du to convert the two-wire N
And demodulates the operation information from the downstream digital signal Dd sent from the main body communication circuit 14 via the remote control microcomputer 3.
5 and 45.

The push-button switches 30 and 40 are unlock-type push-button switches whose contacts switch to a closed state during the operation when the push operation is performed. When the priority change operation is performed, the operation signals 300 and 400 are generated. It is sent to remote control microcomputers 35 and 45 to be described later.

Push button switches 32, 33, 42, 4
Reference numeral 3 denotes an unlock-type push button switch whose contact switches to a closed state during operation when a pressing operation is performed;
When the set temperature change operation is performed, the operation signals 320, 330,
420 and 430 are sent to remote control microcomputers 35 and 45 described later.

The operation switches 34 and 44 are unlock-type push-button switches whose contacts are switched to a closed state during operation when a pressing operation is performed. When the pressing operation is performed, operation signals 340 and 440 are transmitted to a remote control described later. Are sent to the side microcomputers 35 and 45.

The microcomputers 35 and 4 on the remote control side
5 sends operation commands to change the set temperature, change the priority, and start / stop operation to the remote control communication circuits 31 and 41, and convert the operation information demodulated by the remote control communication circuits 31 and 41 into display signals. I do.

The operation lamps 361 and 461 are backlights that are turned on during operation, the priority lamps 362 and 462 are LEDs that are turned on when the remote controller F is on the priority side and the sub remote control S is on the priority side, and the hot water temperature indicators 363 and 463 are set temperatures. T _{SET 0}
Or 7 segments L that displays the set temperature T _{SET 1} numerically
The ED and combustion lamps 364 and 464 are LEDs that light up when the gas burner 12 is in a combustion state.

Next, the operation of the water heater remote control system A will be described with reference to the flowchart shown in FIG.

The user depresses any one of the operation switches 24, 34, 44 to put the water heater main body K into operation (the operation lamps 261, 361, 461 are lit). If necessary, the hot water taps 1136, 1137, Open 1138. At this time, in the initial state when the plug is inserted, the priority is set to the main remote controller M, and the set temperatures T _SET1 and T _{SET 0 are set.}
= 40 ° C. At the start of the second and subsequent operations, the priority is the previous state, the set temperatures T _{SET 1} , T _{SET 0}
Is read from the memory 150 for the previous value. Note that in the previous shutdown, the set temperature _{T SE} T ₁ = 42 ℃ the time of the set temperature T _{SET 1} ≧ 43 ℃, the set temperature T _{SET 0} ≧ 5
In the case of 1 ° C., the set temperature T _{SET 0} = 50 ° C. and the memory 1
50.

In step s1, detected water amount W ≧ ignition water amount W
_The microcomputer 15 determines whether it is _ON or not. If the detected water amount W ≧ the ignition water amount W _ON (YES), the process proceeds to step s2. If the detected water amount W <the ignition water amount W _ON (YES), the process proceeds to step s12. Proceed to.

In step s2, the main microcomputer 15 instructs the combustion fan 122 to start operating, and proceeds to step s3.

In step s3, the main body side microcomputer 15 instructs the ignition operation of the gas burner 12, and proceeds to step s4. The igniter 120 is operated by the ignition operation.
2 is activated, spark discharge occurs at the ignition electrode 1201, and the original solenoid valve 1211, the gas solenoid valve 1212, and the switching solenoid valve 131 are opened.

At step s4, the main microcomputer 15 determines whether or not a flame is detected (the frame rod 12).
03), and if a flame is detected (YES), the process proceeds to step s5. If not (NO), the process proceeds to step s11.

In step s5, the main body side microcomputer 15 turns on the combustion lamps 264, 364, and 464 of the main remote controller M, the remote controller F, and the sub remote controller S, and proceeds to step s6.

In step s6, the main body microcomputer 15 determines whether or not the priority is on the main remote controller M side. If the priority is on the main remote controller M side (YES), the process proceeds to step s7, where the main microcomputer 15 is not on the main remote controller M side. Case (N
O) proceeds to step s10.

In step s7, the microcomputer 15 on the main body side switches the solenoid valve 131 based on the detected feed water temperature T _IN and the detected hot water temperature T _{out so} that the hot water temperature T _out is maintained at the set temperature T _{SET 0} . It controls the governor proportional solenoid valve 132 and the electric water flow controller 133 with distributor. Further, it instructs the hot water temperature indicators 263, 363, 463 to display the set temperature T _{SET 0} .

At step s8, detected water amount W <fire extinguishing water amount W
_The main body side microcomputer 15 determines whether or not it is _OFF , and when the detected water amount is smaller than the fire extinguishing water amount W _OFF (the hot water tap 1
If 136, 1137, and 1138 are closed; YES), the process proceeds to step s9. If the detected water amount W ≧ the fire extinguishing water amount W _OFF (if not closed; NO), the process returns to step s4.

In step s9, the main body side microcomputer 15 performs the fire extinguishing operation of the gas burner 12, and returns to step s1. The extinguishing operation causes the original solenoid valve 121
1. The gas solenoid valve 1212, the switching solenoid valve 131, and the governor proportional solenoid valve 132 are closed, and the combustion lamp 26
4, 364, and 464 are turned off, and after the end of the post-fan operation for 10 seconds, the combustion fan 122 stops.

In step s10, the microcomputer 15 on the main body side switches the solenoid valve 131 and the governor so that the detected tap water temperature T _out is maintained at the set temperature T _{SET 1} based on the detected feed water temperature T _IN and the detected water amount W. It controls the proportional solenoid valve 132 and the electric water flow controller 133 with a distributor. Further, it instructs the hot water temperature indicators 263, 363, 463 to display the set temperature T _{SET 1} .

In step s11, the main microcomputer 15 determines that the original solenoid valve 1211 and the gas solenoid valve 121
2. The switching electromagnetic valve 131 and the governor proportional electromagnetic valve 132 are closed, the combustion lamps 264, 364, and 464 are turned off, and an error stop operation for stopping the combustion fan 122 is instructed. It should be noted that the restart is performed by the operation switch 2 once.
After pressing any one of the buttons 4, 34, 44 to stop the operation, the cause of the error is removed, and the operation switches 24, 34,
The operation is performed by re-pressing any one of 44 to bring the water heater main body K into the operating state.

At step s12, the main body side microcomputer 15 determines whether or not the priority is on the flow / sub remote controller side (YES) or not (NO). Step S13 includes the case where the priority is shifted to the sub remote controller)
Proceeds to step s1 if it is on the main remote controller M side.
Go to 9.

At step s13, the set temperature T _{SET 0} ≧ 5
The main body side microcomputer 15 determines whether or not the temperature is 1 ° C., and when the set temperature T _{SET 0} ≧ 51 ° C. (YES)
Proceeds to step s14, and if the set temperature T _{SET 0} <51 ° C. (NO), proceeds to step s15.

At step s14, the set temperature T _{SET 0} = 5
Execute 0 ° C. and proceed to step s15.

In step s15, the main body side microcomputer 15 detects whether or not any of the contacts of the push button switches 33, 43 is closed, and the closing is detected (YE).
S) and the process proceeds to step s16. If the closing is not detected (NO), the process proceeds to step s17.

[0086] In step s16, and executes the _{SET 1} + 1 ° C. set temperature T _{SET 1} = set temperature T, the processing flow advances to step s17.

In step s17, the main body side microcomputer 15 detects whether or not the contact point of one of the push button switches 32, 42 is closed, and the closing is detected (Y).
ES) and the process proceeds to a step s18. If the closing is not detected (NO), the process returns to the step s1.

[0088] In step s18, and executes the _{SET 1} -1 ° C. set temperature T _{SET 1} = set temperature T, the flow returns to step s1.

At step s19, set temperature T _{SET 1} ≧ 4
The main body side microcomputer 15 determines whether or not the temperature is 3 ° C., and when the set temperature T _{SET 1} ≧ 43 ° C. (YES)
Proceeds to step s20, and if the set temperature T _SET1 <43 ° C. (NO), proceeds to step s21.

At step s20, the set temperature T _{SET 1} = 4
Execute 2 ° C. and proceed to step s21.

At step s21, the push button switch 2
The main body side microcomputer 15 detects whether or not the contact No. 3 is closed. If the closing is detected (YES), the process proceeds to step s22. If the closing is not detected (NO), the process proceeds to step s23.

In step s22, the set temperature T _{SET 0} = set temperature T _{SET 0} + 1 ° C. is executed, and the flow advances to step s23.

At step s23, the push button switch 2
The main body side microcomputer 15 detects whether or not the second contact is closed. If the closing is detected (YES), the process proceeds to step s24. If the closing is not detected (NO), the process returns to step s1.

At step s24, set temperature T _{SET 0} = set temperature T _{SET 0} -1 ° C. is executed, and the process returns to step s1.

Next, the advantages of the water heater remote control system A will be described. [A] Gas burner 12 is burning and hot water taps 1136, 1
During hot water supply where hot water is being discharged from 137 and 1138 (however, the detected water amount W is equal to or greater than the fire extinguishing water amount W _OFF ), the user presses the push button switches 22 and 23 of the main remote controller M, the remote controller F and the sub remote controller S , 32, 33, 4
3 and 44, the operation command accompanying the set temperature change operation is converted into an upstream digital signal Du and sent to the main body side communication circuit 14, and the operation command accompanying the set temperature change is transmitted from the upstream digital signal Du to the main body side. also the communication circuit 14 is sent to the main body side microcomputer 15 demodulates, body-side microcomputer 15 does not change the set temperature T _{sET 0} or the set temperature T _{sET 1.}

That is, hot water taps 1136, 1137, 11
While the hot water is being discharged with the opening 38 open, the temperature of the hot water to be discharged cannot be changed, which is advantageous in the following points.

While opening the hot water taps 1138 and 1137 and taking a shower or washing the head, the user presses the push button switch 42 of the sub remote controller S or the flow remote controller F,
Since the temperature of the hot water to be discharged does not change even if the pressing operation of 43, 32, and 33 is performed, there is no problem that the temperature of the hot water changes to the opposite side to the desired side and the user feels discomfort.

Also, while the hot-water tap 1136 is being opened and hot water is being used, a child or the like mischiefs and presses the push button switches 22, 23, 32, 33, 42, 43 of any of the remote controllers.
Is safe because the temperature of the hot water to be discharged does not change even if the button is pressed.

[I] To start combustion of the gas burner 12
Ignition water amount W_ON(The main unit microcomputer 15 is installed.
The detected water amount at which the constant temperature does not change) is_SET
And detected feedwater temperature T_INIs decided based on the
Overheating of the heat exchanger 112a and water passing through the heat exchanger 112a
Boiling or tap water temperature is set temperature T_{SET 0}Or set temperature T
_{SET 1}Prevents problems such as higher
Wear.

[0] The set temperature can be changed only by pressing the push button switches 22, 23, 32, 33, 43, and 44 of the remote control having the priority (hot water taps 1136, 1137, 1138). Is closed), and the set temperature changing operation is easy. Further, since the set hot water temperature changer is an unlocking push button switch, the operation position is not determined, and there is no uncomfortable feeling even when the set temperature change operation is invalidated. Further, since the set hot water temperature changer is a push button switch that closes a contact point when a pressing operation is performed, the remote control microcomputers 25, 35, and 45 can easily detect the pressing operation.

Next, a second embodiment of the present invention (Claim 1,
3 ) will be described with reference to FIGS. As shown in the figure, the water heater remote control system B includes a water heater main body K ₂ installed indoors, a main remote controller M ₂ installed in a kitchen, and a water heater main body K ₂ and a main remote controller M _2. And a wire N.

The water heater main body K ₂ is provided with a heat exchange channel 11 formed by connecting a water supply pipe 115, a heat exchanger 110, and a tapping pipe 117.
, Hot water tap 1136, water amount sensor 116, gas burner 12, and hot water temperature thermistor 118 for detecting hot water temperature
And a feed water temperature thermistor 119 for detecting the feed water temperature, a switching solenoid valve 131, a governor proportional solenoid valve 132, and an electric water flow control device 134 which are actuators, a main body side communication circuit 14, a main body side microcomputer 15, and the like. Is provided.

The water supply pipe 115 has an upstream side connected to a water supply system (not shown) and a downstream side connected to an inlet of the electric water flow control device 134. The water supply pipe 115 is provided with a water filter / water tap m, a water amount sensor 116, and a water supply temperature thermistor 119 from the upstream side.

The heat exchanger 112a, which is disposed in the combustion cylinder above the gas burner 12 and heats water passing therethrough,
The upstream side is connected to the outlet of the electric water flow control device 134, and the downstream side is connected to the tapping pipe 117.

The electric water flow control device 134 includes a water supply pipe 115
It is a device that controls the amount of water passing through the.

The tapping pipe 113 is provided with a can body thermistor 113.
1. A water tap 1132, a freeze prevention heater 1134, a tap water temperature thermistor 118, an overpressure safety valve / water tap 1135, and a hot water tap 1136 are sequentially provided.

Hot water tap 1136 is a hot water tap for adjusting the amount of hot water discharged from a faucet provided in the kitchen.

The main body communication circuit 14 converts the operation information of the presence / absence of combustion, whether or not the operation is being performed, and the set temperature into a digital signal Dd, and sends it to the remote control communication circuit 21 via the two-wire N. The demodulation unit demodulates the operation instruction of the operation stop instruction and the set temperature change instruction from the upstream digital signal Du sent from the remote control side communication circuit 21.

When the power cord of the water heater main body is plugged into the outlet, the main body side microcomputer 15 is supplied with operating power and starts operating.

The detected water amount W is equal to the ignition water amount W._ONMore than
In this case, the combustion fan 122 is instructed to energize and the gas burner 12
And the detected feed water temperature T_INAnd detection hot water
Warm T _outBased on the detected hot water temperature T_outIs the set temperature T_SET
Switching solenoid valve 131, governor proportional solenoid valve
132 and the electric water flow control device 134 are controlled.

The main microcomputer 15 is
When the detected water amount is less than the ignition water amount W _ON , the main remote control M
When the set temperature change operation is performed at the set temperature T _SET (37 ° C. to 55 ° C.) based on the demodulated set temperature change operation command.
° C) and rewrite the data in the memory 150.

In this embodiment, the ignition water amount W _ON and the fire extinguishing water amount W _OFF are set to the following values (fixed values). Ignition water amount W _ON = 2.7 (l / min) Fire extinguishing water amount W _OFF = 2.0 (l / min)

The main remote controller M ₂ includes a remote controller communication circuit 21, push button switches 22 and 23 for instructing a change in set temperature, an operation switch 24 for instructing start and stop of operation, and a remote controller microcomputer 2.
5, a display circuit 26, an operation lamp 261, a hot water temperature indicator 263, and a combustion lamp 264.

The remote-control-side communication circuit 21 sends an operation command for changing the set temperature and starting / stopping the operation by sending an up digital signal Du.
To the main body communication circuit 14 via the two-wire N.
And demodulates the operation information from the downstream digital signal Dd sent from the communication circuit 14 on the main body side and sends it to the microcomputer 25 on the remote control side.

The hot water temperature indicator 263 is a seven-segment LED for displaying the set temperature T _SET numerically.

In FIGS. 4 and 5, those having the same numbers as those of the remote control system A for the water heater have the same configuration.

Next, the operation of the water heater remote control system B will be described with reference to the flowchart shown in FIG.

The user presses the operation switch 24, and
The water heater body K ₂ to the operating state (operation lamp 261 is illuminated), opening the water tap 1136 as needed. At this time, in the initial state when the plug is inserted, the set temperature T _SET = 40
Set to ° C. At the start of the second and subsequent operations, the value of the set temperature T _SET is read from the memory 150.

In step S1, detected water amount W ≧ ignition water amount W
_The microcomputer 15 determines whether or not the detected water amount is _ON (whether or not the detected water amount is 2.7 liters or more per minute). If the detected water amount W ≧ the ignition water amount W _ON , the process proceeds to step S.
The process proceeds to step S2, and if the detected water amount W <the ignition water amount W _ON , the process proceeds to step S8.

In step S2, the main body side microcomputer 15 instructs the combustion fan 122 to start operating, and proceeds to step S3.

In step S3, the main microcomputer 15 instructs the ignition operation of the gas burner 12, and proceeds to step S4. The igniter 120 is operated by the ignition operation.
2 is activated, spark discharge occurs at the ignition electrode 1201, and the original solenoid valve 1211, the gas solenoid valve 1212, and the switching solenoid valve 131 are opened.

At step S4, the main microcomputer 15 determines whether or not a flame is detected (the frame rod 12).
03), and if the flame is detected (YES), the process proceeds to step S5, and if not (NO), the process proceeds to step S12.

In step S5, the main body side microcomputer 15 turns on the combustion lamp 264 and detects the detected hot water temperature T based on the detected water supply temperature T _IN and the detected hot water temperature T _out.
switching solenoid valve 13 so that _out is maintained at the set temperature T _SET.
1, governor proportional solenoid valve 132, and electric water flow control device 1
34 is controlled. The set temperature T is displayed on the hot water temperature indicator 263.
Instruct _{SET to} be displayed.

In step S6, detected water amount W <fire extinguishing water amount W
_The main body side microcomputer 15 determines whether or not the water is _OFF (whether or not the detected water amount W is less than 2.0 liters per minute), and if the detected water amount is smaller than the fire extinguishing water amount W _OFF (the hot water tap 1).
If 136 is closed; YES), the process proceeds to step S7,
If the detected water amount W ≧ the fire extinguishing water amount W _OFF (when not closed; NO), the process returns to step S4.

In step S7, the main body side microcomputer 15 performs the fire extinguishing operation of the gas burner 12, and returns to step S1. The extinguishing operation causes the original solenoid valve 121
1. The gas solenoid valve 1212, the switching solenoid valve 131, and the governor proportional solenoid valve 132 are closed, and the combustion lamp 26
4 turns off, and after the completion of the post-fan operation for 10 seconds, the combustion fan 122 stops.

In step S12, the main microcomputer 15 determines that the original solenoid valve 1211, the gas solenoid valve 121
2. The switching solenoid valve 131 and the governor proportional solenoid valve 132 are closed, the combustion lamp 264 is turned off, and an error stop operation for stopping the combustion fan 122 is instructed.
Incidentally, restart, once removes the cause of the error after stopping operation of the operation switch 24 is pressed, and then re-pressing the operation switch 24 is performed by which the operating state of the water heater body K _2.

In step S8, the push button switch 23
The microcomputer 1 on the main body side determines whether the contacts of
5 and the closing is detected (YES), step S
The process proceeds to step S9, and if the closing is not detected (NO), the process proceeds to step S10.

In step S9, the set temperature T _SET = set temperature T _SET + 1 ° C. is executed, and the flow advances to step S10.

In step S10, the push button switch 2
The main body side microcomputer 15 detects whether or not the second contact is closed. If the closing is detected (YES), the process proceeds to step S11. If the closing is not detected (NO), the process returns to step S1.

In step S11, set temperature T _SET = set temperature T _SET -1 ° C. is executed, and the process returns to step S1.

Next, advantages of the water heater remote control system B will be described. [E] During hot water supply in which the gas burner 12 is burning and hot water is being discharged from the hot water tap 1136 (the detected water amount W is the fire extinguishing water amount W _OFF
As described above, the user depresses the push button switches 22 and 23 of the main remote controller M, and the operation command accompanying the set temperature change operation is converted into an up digital signal Du and sent to the main body side communication circuit 14. Even when the main body communication circuit 14 demodulates the operation command accompanying the set temperature change from the up digital signal Du and sends it to the main body microcomputer 15, the main body microcomputer 15 _{keeps the} set temperature T _SET.
Do not change

That is, while the hot-water tap 1136 is being opened and hot water is being discharged, the temperature of the hot water to be discharged cannot be changed, which is advantageous in the following points.

[0133] by opening the hot-water tap 1136, while the user is a washing dishes in the kitchen, the temperature of the hot water to be discharged even when pressing the push button switch 22 and 23 of the main remote control M ₂ blindly change As a result, there is no problem that the user feels discomfort because the hot water temperature changes to the side opposite to the desired one.

Further, even if a child or the like mischieves and presses the push button switches 22 and 23, the temperature of the discharged hot water does not change, so that it is safe.

[0135] The set temperature can be changed only by pressing the push button switches 22 and 23 (the hot water tap 1136 is closed), and the set temperature changing operation is easy. Further, since the set hot water temperature changer is an unlocking push button switch, the operation position is not determined, and there is no uncomfortable feeling even when the set hot water change operation is performed during hot water supply in which the set temperature change operation is invalidated. Further, since the set hot water temperature changer is a push button switch that closes a contact point when a pressing operation is performed, the remote control microcomputers 25, 35, and 45 can easily detect the pressing operation.

The present invention includes the following embodiments in addition to the above embodiments. a. The set hot water temperature changer may have the following configuration. For each set temperature (for example, 37 ° C., 40 ° C., 43 ° C., 46
(50 ° C., 50 ° C., 55 ° C.), a plurality of push-button switches are provided on the remote controller, and when a push-button switch for setting a desired set temperature is pressed, an operation signal is sent to a remote-control microcomputer. Is done.

A ten-key type push button switch on which numbers from 0 to 9 are written is provided on the remote controller, and when a desired set temperature is input by a ten-key, an operation signal is transmitted to a microcomputer on the remote controller to be described later.

Depending on the direction of rotation, two types of operation signals are transmitted from the encoder to the remote control microcomputer described later.

B. In addition to the digital display of the set temperature, the display may be configured to light up to the LED arranged at the set temperature, or may be configured to light one LED arranged at the set temperature.

[Brief description of the drawings]

FIG. 1 is a schematic view of a water heater main body of a water heater remote control system according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a water heater remote control system according to the first embodiment of the present invention.

FIG. 3 is a flowchart illustrating an operation of the remote control system of the water heater according to the first embodiment of the present invention.

FIG. 4 is a schematic view of a water heater main body of a remote control system for a water heater according to a second embodiment of the present invention.

FIG. 5 is a block diagram of a water heater remote control system according to a second embodiment of the present invention.

FIG. 6 is a flowchart illustrating an operation of a remote control system for a water heater according to a second embodiment of the present invention.

[Explanation of symbols]

111, 115 water supply pipe 112 heat exchanger pipe 112a, 110 heat exchanger 113, 117 tapping pipe 11 heat exchange channel 1136, 1137, 1138 hot water tap 116 water flow sensor 12 gas burner (heater) 119 water supply temperature thermistor (water supply temperature sensor) 118 Hot water temperature thermistor (hot water temperature sensor) B Remote control system of water heater K ₂ Hot water heater main body M ₂ Main remote control N Two-wire wire 131 Switching electromagnetic valve (actuator) 132 Governor proportional electromagnetic valve (actuator) 134 Electric water flow control device ( Actuator) 133 Electric water flow controller with distributor (actuator) Du Up digital signal Dd Down digital signal 21 Remote control side communication circuit 14 Body side communication circuit 15 Body side microcomputer 22, 23 Push button switch (setting hot water temperature changer) 25 Mocon side microcomputer 21 remote controller communication circuit M ₂ main remote controller (remote control) N two-wire wire (communication line)

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor: Shigeru Ogiso 2-26, Fukuzumi-cho, Nakagawa-ku, Nagoya-shi Linnai Co., Ltd. (56) References JP-A-5-93545 (JP, A) JP-A-59- 231351 (JP, A) JP-A-5-122762 (JP, A) JP-A-5-344560 (JP, A) JP-A-5-288402 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F24H 1/10 301 F23N 5/14 370 F23N 5/26 H04Q 9/00 301

Claims (3)

(57) [Claims] 1. A heat exchange channel formed by connecting a water supply pipe, a heat exchanger, and a tapping pipe, a hot water tap disposed at an outlet of the tapping pipe, a water quantity sensor for detecting an amount of water flowing through the heat exchange channel, A heater for heating the heat exchanger, a water supply temperature sensor for detecting a water supply temperature, a water supply temperature sensor for detecting a water supply temperature, operating the heating amount of the heater, the water amount, or both the heating amount and the water amount A main unit that converts operation information such as actuator and set temperature into a downstream digital signal and sends it to a remote control side communication circuit described later, and demodulates operation commands such as set temperature change from an upstream digital signal sent from the remote control side communication circuit. The side communication circuit, and when the detected water amount is equal to or more than a predetermined value, activates the heater and controls the actuator based on the detected supply water temperature and the detected water amount such that the tap water temperature is maintained at the set temperature. A water heater main body equipped with a main body microcomputer to be controlled, a set hot water temperature changer for sending an operation signal to a remote control microcomputer to be described later when a set temperature change operation is performed, and a remote control to be described later for operating commands for changing the set temperature, etc. A remote control microcomputer that transmits the operation information to the display signal while transmitting the operation information to the display communication signal, and converts the operation command into an upstream digital signal and sends the digital signal to the main body communication circuit, and is transmitted from the main body communication circuit. One or more remote controllers, comprising: a remote controller communication circuit for demodulating operation information from a downstream digital signal; and a display for displaying the operation information based on the display signal; and the main body communication circuit and the remote controller. In a remote control system for a water heater, comprising a communication line for connecting to a communication circuit.
The main body side microcomputer has the set temperature and
While determining the predetermined value based on the detected supply water temperature,
That the detection water only if less than a predetermined value, to change the setting temperature on the basis of the operation command of the set temperature changes demodulated
Characteristic remote control system of water heater. 2. Water supply pipe-heat exchanger pipe with heat exchanger-
A heat exchange channel formed by connecting a tapping pipe, a hot water tap provided at an outlet of the tapping pipe, a water quantity sensor for detecting a quantity of water flowing through the tapping pipe or the tapping pipe, a heater for heating the heat exchanger A supply water temperature sensor for detecting supply water temperature; a supply water temperature sensor for detecting supply water temperature; a heating amount of the heater, a water amount passing through the water supply pipe, a heat exchange water amount passing through a heat exchanger, and the heat exchanger pipe. Actuator for controlling the ratio with the amount of bypass water that reaches the tapping pipe without passing through the tapping pipe, converts operation information such as set temperature into a down-converted digital signal and sends it to a remote-control-side communication circuit, which will be described later, and sends it from the remote-control-side communication circuit. A main body communication circuit for demodulating an operation command such as a set temperature change from an incoming digital signal, and when the detected water amount is equal to or more than a predetermined value, the heater is operated, and the detected supply water temperature and the detected water amount are reduced. A water heater main body including a main body microcomputer for controlling the actuator so that the hot water temperature is maintained at a set temperature; and a setting for transmitting an operation signal to a remote control microcomputer to be described later when a set temperature change operation is performed. A hot water temperature changer, a remote control microcomputer for transmitting operation commands such as a set temperature change to a remote control communication circuit to be described later, and converting the operation information into a display signal; Along with sending to the communication circuit, a remote control side communication circuit for demodulating operation information from the downstream digital signal sent from the main body side communication circuit, and a display for displaying the operation information based on the display signal, comprising one or a plurality of remote control, and a communication line for connecting the main body-side communication circuit and the remote control-side communication circuit Water heater of a remote control system that smell
The main body side microcomputer has the set temperature and
While determining the predetermined value based on the detected supply water temperature ,
The remote control system for a water heater, wherein the microcomputer changes the set temperature based on the demodulated set temperature change operation command only when the detected water amount is less than a predetermined value. 3. The set hot water temperature changer is connected during a pressing operation.
This is an unlockable push button switch that switches points.
A remote control system for a water heater according to claim 1 or 2.
M