JPH05203260A - Hot-water supply device - Google Patents

Abstract

PURPOSE:To provide a hot-water supply device capable of being used in two modes, a mode having a remote control operating device and a mode having no remote control operating device. CONSTITUTION:A remote control detecting means emitting a no-remote control signal when the presence of a remote control operating device 7 is decided and the remocon operating device 7 is not connected and an AND circuit emitting an abnormal signal when the no-remote control signal output from the remote control detecting means and a water-flow detecting signal output from a water flow detector are received are provided, and a gas burner 10 is maintained under the state of combustion inhibition during a time when the abnormal signal is output from the AND circuit at the time of re-conduction after return from service interruption.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply apparatus, and more particularly to a hot water supply apparatus which can be used in two modes, one having a remote controller and the other not having the remote controller.

[0002]

2. Description of the Related Art As a hot water supply device of a type which can be used in two modes, that is, a mode equipped with a remote control operation device and a mode not equipped with it, there is, for example, the one shown in FIG. The figure shows the case where a remote control device is connected. From the upstream side of the water passage (1), the flow counter (2), the water temperature sensor (3), the heat exchanger (4) and the tap water tap (5). Are arranged in this order, and the flow rate counter (2) is
Measure the amount of water flowing through (1) per unit time. The flow rate counter (2) is electrically connected to the control device (6), and the control device (6) is further connected to a remote control operating device (7) for setting the hot water temperature. Further, the remote control operating device (7) has a temperature setting button (71) and an operation switch (7
2) is provided.

In the gas circuit (11), the main gas valve (1
3), the proportional valve (12) and the gas burner (10) are arranged in this order, and the original gas valve (13) is kept open in the normal state and closed in the non-energized state. It is composed of a solenoid valve. When the operation switch (72) is turned on after the hot water temperature is set with the temperature setting button (71) and the hot water tap (5) is opened, the flow rate counter (2 ) Output, an energization signal is output from the control device (6) to the original gas valve (13) to open the gas burner (10).
Ignite Then, the hot water temperature set by the temperature setting button (71), the measured flow rate of the flow rate counter (2), and the temperature sensor
Control the amount of combustion of the gas burner (10) while controlling the feed forward from the detected water temperature of (3), etc.
Hot water of the temperature set with the temperature setting button (71) is tapped
Take out from (5).

This device can be used without connecting the remote control operating device (7). If the remote control operation device (7) is not connected, the remote control operation device
Fixed temperature (eg 50 ° C) instead of the set temperature of (7)
The hot water supply operation is executed in the same manner as in the case where the remote control operating device (7) is provided, except that is adopted. That is, the control device
The same control program as in the case where the remote control operating device (7) is provided is executed, except that the fixed temperature previously stored in the microcomputer of (6) is adopted. Then, in the case of the use mode in which the remote control operating device (7) is not connected, the hot water temperature is adjusted by using a hot and cold water mixing tap as the hot water tap (5).

As described above, the hot water supply device has an advantage that it is not necessary to prepare the control devices (6) of different types depending on the presence or absence of the remote control operating device (7). In the hot water supply device, when a power failure occurs during the hot water supply operation, the source gas valve (13) is de-energized and closed, and the combustion of the gas burner (10) is stopped. However, since the hot water tap (5) is still open and unheated water is being released, the main gas valve (13) is energized to open and open the gas burner (1
It is necessary to prevent abrupt combustion of (0) and secure a safe condition. Therefore, the following measures may be taken.

That is, when it is judged that the hot water tap (5) is in the open state by checking whether the flow rate measured by the flow rate counter (2) is "0" after the power failure is restored, the gas burner (10) is put into the extinguished state. The safety confirmation subroutine to be maintained at is prepared in the control program, and after the power failure is restored, the safety confirmation subroutine is uniformly executed regardless of whether the remote control device (7) is connected or not. ..

However, in this case, the remote control operating device
In the usage mode in which (7) is connected, the remote control operating device (7) and the microcomputer storing the operation signal of the operation switch (72) are naturally turned off after the power failure is recovered, so that the tap water faucet (5) is Even if it is in the open state, the main gas valve (13) is not energized, and although there is no concern that the gas burner (10) will suddenly burn, the hot water tap (5 ) Need to be cut off. That is, in the usage mode in which the remote control operating device (7) is connected, the remote control operating device is temporarily shut off after the tap water tap (5) is shut off after the power is restored.
Operate the operation switch (72) of (7) and then tap the tap again.
If (5) is not opened, hot water cannot be taken out, which complicates the operation.

In the above, the opening / closing of the hot water tap (5) is determined by the presence or absence of the output of the flow rate counter (2) for determining the flow rate in the water passage (1). Instead of), a water flow switch that turns ON / OFF depending on the presence / absence of water flow may be provided, and the ON / OFF signal of the water flow switch may be used to determine the open / closed state of the hot water tap (5) after a power failure recovery. In this case, when the hot water temperature sensor is arranged on the downstream side of the heat exchanger (4) and the hot water tap (5) is opened, the output of the hot water temperature sensor is used to feedback control the gas burner (10). Control the amount of combustion of and take out hot water at the set temperature.

The present invention has been made in view of the above points, and is provided with "a water flow detector such as a flow counter or a water flow switch for detecting the presence or absence of a water flow generated in the water passage (1), and after a power failure is restored. Is a hot water supply device that can be used in both a usage mode in which a remote control operation device (7) of a type that can perform a hot water supply operation thereafter is connected only when it is operated again and a usage mode in which it is not connected. In this regard, it is an object to prevent the gas burner (10) from suddenly burning at the time of re-energization after the power failure is restored, and to facilitate the hot water supply operation after the power failure is restored.

[0010]

The technical means of the present invention for solving the above-mentioned problem is to "determine the presence or absence of a remote controller operating device (7) and to output a remote controller no signal when the remote controller operating device (7) is not connected. Detecting means and an AND circuit that outputs an abnormal signal when receiving a remote control absence signal output by the remote control detecting means and a water flow detection signal output by the water flow detector are provided, and the AND circuit outputs an abnormality when re-energized after recovery from a power failure. The gas burner (10) is kept in a combustion prohibited state while the signal is being output. ”

[0011]

The above technical means operates as follows. When the power failure occurred during the hot water supply operation (when the hot water tap is opened), the output of the remote control detection means is determined to determine whether or not the remote control operating device (7) is connected.
In addition, the output of the water flow detector that checks for the presence of water flow in the water passage (1) is judged to see if the inside of the water passage (1) is in a water-flowing state and the tap water tap (5) is left open. Determine whether or not. And, the remote control operation device (7) is not connected (the remote control detection means outputs a remote control absence signal) and the water flow detector outputs a water flow detection signal (the tap water faucet (5) is in an open state). If it is determined that the above), the AND circuit to which both of these signals are applied outputs an abnormal signal.

Then, while the abnormal signal is output from the AND circuit, the combustion of the gas burner (10) is maintained in a prohibited state, and after the abnormal signal disappears, the hot water supply control is enabled. That is, according to the above technical means, when it is determined that the remote control operating device (7) is not connected and the hot water tap (5) is still open, the gas burner (10) is set to the combustion prohibited state. Therefore, the hot water supply operation is maintained.

Next, the operation after the recovery from the power failure will be described in detail according to the usage mode in which the remote control operation device (7) is connected and the usage mode in which the remote control operation device (7) is not connected. ． In the case of the usage mode in which the remote control operating device (7) is connected: When the remote control operating device (7) is connected, the "remote control no signal" is output from the remote control detection means when the power is restored.
Is not output, the abnormal signal is not output from the AND circuit that outputs the abnormal signal under the condition that the signal is generated. On the other hand, since the remote control operating device (7) returns to the initial state (state when the power supply is connected) when the power is restored, the hot water supply device does not come out unless the operation required for hot water supply operation is performed again by the remote control operating device (7). Not possible. That is, when the remote control operating device (7) is connected, the remote control operating device (7) is operated even if the tap water faucet (5) is open and the water flow detector outputs a water flow detection signal. Unless it is done, the gas burner (10) for hot water supply does not burn.

.. In the case of usage without connecting the remote controller (7) In the usage without connecting the remote controller (7), the "remote controller no signal" is output from the remote controller when the power is restored, and under such conditions the water flow detector If the water flow detection signal is output from the AND circuit, an abnormal signal is output from the AND circuit. When the abnormal signal is output, the gas burner (10) is kept in the combustion prohibited state, so in this state the hot water tap (5) is closed so that the water flow detector does not output the water flow detection signal. To Then, the abnormal signal from the AND circuit disappears and the hot water supply control is enabled. That is, once close the hot water tap (5) and then tap the hot water tap again.
When (5) is opened, the hot water discharge operation starts, and the gas burner for hot water supply burns only at this time.

As described above, according to the above technical means, regardless of whether or not the remote control operating device (7) is connected, operation of the remote control operating device (7) or closing of the tap (5) Unless operated, the gas burner will not burn.

[0016]

[Effect] The present invention has the following unique effects. In the usage mode in which the remote control operation device (7) is connected, the remote control operation device is used.
Unless the operation of (7) is performed, there is no concern that the gas burner will burn after the power is restored, and in the usage mode in which the remote control operation device (7) is not connected, unless the tap water tap (5) is once closed, Since the gas burner does not burn suddenly, safety can be ensured after a power failure is restored.

Further, in the usage mode in which the remote control operating device (7) is connected, even if the hot water tap (5) is open, the hot water supply operation is started only by re-operating the remote control operating device (7). Therefore, compared with the one described above, the tapping operation will not start unless the tapping tap (5) is closed and the remote control device (7) is reopened before opening the tapping tap (5) again.
Operation of hot water after power failure is simplified.

[0018]

EXAMPLES Next, examples of the present invention described above will be explained.
When the present invention is applied to a hot water supply apparatus to which a remote control operating device is connected, a control circuit and the like are configured as in the case of FIG. 1 described above, and a flow rate counter (2 that measures the flow rate of the water passage (1) is used. ) (Corresponding to the water flow detector described in the above-mentioned technical means) has a specific configuration as follows.

A unit water amount measuring device (21) that outputs one pulse each time a unit water amount passes, a counter (22) that counts the number of pulses output by the unit water amount measuring device (21), and the counter ( It is composed of a register (23) for storing the output of (22). The output of the timer (24) that outputs a pulse every one second is applied to the clear terminal (221) of the counter (22) and the load terminal (231) of the register (23). The counter (22) is reset to "0" each time a pulse is output every 1 second, and the counter (22) keeps the number of pulses of the unit water quantity measuring device (21) until the next 1 second elapses. measure. That is, the counter (22) outputs the flow rate passing through the water passage (1) in one second. Then, the counter (2
The flow rate output by 2) (flow rate per second) is stored in the register (23) every second according to the output of the timer (24).
As a result, the register (23) outputs the amount of water that has passed through the water passage (1) in one second, that is, the flow rate.

A control program having the contents shown in FIG. 2 is stored in the microcomputer incorporated in the control device (6), and the operation of the hot water supply device according to the embodiment of the present invention will be described below with reference to FIG. [In the case of usage in which the remote control device (7) is connected] (a). When the hot water supply device is connected to an electric outlet to supply electricity, it is determined whether or not the remote control operating device (7) is connected (see step (80) in the drawing). (I). Next, when the remote control operating device (7) is connected, it is monitored that the operation switch (72) arranged in the remote control operating device (7) is turned on (step of reference numeral (81)). When the operation switch (72) is turned on, the set temperature set by the temperature setting button (71) of the remote control operating device (7) is stored in the microcomputer as a tap water temperature (T) (reference numeral (82)). See step). (C). Next, the measured flow rate (flow rate per unit time) of the flow rate counter (2) is monitored (see the step of drawing code (83)), and the measured flow rate of the flow rate counter (2) is not "0" and the tap ( If the 5) is judged to have been opened, the original gas valve
Energize (13) and keep it open to keep the gas burner (1
0) (see step (84)). (D). Hot water temperature (T) read in the microcomputer in the step of the drawing code (82), water temperature of the water passage (1) detected by the temperature sensor (3), and further the heat exchanger (4) Based on the heat exchange efficiency, etc., the feed-forward control of the combustion amount of the gas burner (10) is performed so that the hot water at the outlet temperature (T) is boiled in the heat exchanger (4) part (see the step of the drawing code (85)). ..
That is, in order that the hot water at the tapping temperature (T) is boiled in the heat exchanger (4), the gas circuit (1) to the gas burner (10)
The opening of the proportional valve (12) inserted in (1) is controlled. (E). During the hot water supply operation, the output of the flow rate counter (2) is continuously monitored (see the step of drawing code (86)), and when the measured flow rate of the flow rate counter (2) is "0", the tap water faucet (5 ) Is closed, the main gas valve (13) upstream of the proportional valve (12) is de-energized and closed to maintain the gas burner (10) in a fire extinguishing state ( Drawing code (8
See step 7)).

Now, while the hot water supply operation is being continued while monitoring whether or not the measured water amount of the flow rate counter (2) is "0", that is, the steps of the reference numerals (85) (86) are repeatedly executed. If a power failure occurs during the operation, the electric power supply to the control device (6) and the remote control operation device (7) is stopped. Therefore,
The power supply to the main gas valve (13) is also stopped and the gas burner (10) is put into a fire extinguishing state. At this time, the tap water tap (5) remains open. Then, when the power failure is restored, the control device (6)
Also, the power supply to the remote control operation device (7) is restarted, and the control operation starts again from the step of the reference numeral (80), until the operation switch (72) of the remote control operation device (7) is turned on. 72) Monitor the input. That is, after the power failure is restored, unless the operation switch (72) is turned on, the main gas valve (13) is not energized and the gas burner (10) is not ignited even if the hot water tap (5) is open ( Drawing number (84)
Step is not executed). This can prevent the risk of sudden combustion of the gas burner (10) when the power is restored.

In this embodiment, the remote controller operating device (7)
The function unit in the microcomputer that executes the step of the drawing reference numeral (80) for determining whether or not is connected corresponds to the remote control detection means described in the above-mentioned technical means section. [In the case of a usage mode in which the remote control device (7) is not connected] (a). When the remote control device (7) is not connected, if the hot water supply device is connected to an electric outlet to supply electricity, the step of drawing code (80) is executed, and then a waiting time of 1 second is performed (drawing code (91 )), And then determine whether the measured water amount of the flow rate counter (2) (the amount of water that has passed through the water passage (1) in 1 second) is "0" (drawing code)
See step (92)). Then, when the amount of water measured by the flow rate counter (2) is not "0", that is, when the tap water faucet (5) is already in the open state from the beginning when power is supplied to the control device (6), the tap water tap (5) Is closed and the amount of water measured by the flow counter (2) is monitored to "0". (I). On the other hand, when it is determined that the measured water amount of the flow rate counter (2) is “0” and the hot water tap (5) is closed when the step of the drawing symbol (92) is executed, the microcomputer RO
The outlet temperature (T) is the temperature of 50 ° C stored in M in advance.
(Refer to the step of the drawing code (93)) and then perform the hot water supply operation in the same manner as in the case of the use mode having the remote control operation device (7) already described when the hot water tap (5) is opened. To do.

Then, when a power failure occurs during the hot water supply operation and then the power failure is restored, the step of the drawing code (80) is executed after the power supply to the control device (6) is restarted, and then the drawing code
At step (91), a waiting time of 1 second is executed, and then a drawing code (92) for judging whether or not the measured flow rate of the flow rate counter (2) is "0" is executed. Then, when the hot water tap (5) is left open during the power failure, the hot water tap (5) is closed and the flow counter (5) is closed because the flow rate measured by the flow rate counter (2) is not "0". The output of the flow rate counter (2) is monitored until the measured flow rate of 2) becomes "0". That is, when the hot water outlet faucet (5) is already open when the power is restored, the hot water supply operation does not start until the hot water outlet faucet (5) is once closed (the original gas valve (13) is energized and opened). The gas burner (10) cannot be burnt). As a result, it is possible to ensure the safety at the time of power failure recovery in the usage mode in which the remote control operation device (7) is not connected. In addition, in this embodiment, the operation of confirming the presence or absence of the connection of the remote control operating device (see the step of the drawing code (80)) and further monitoring the output of the flow rate counter (2) (the step of the drawing code (92)) is performed. The functional unit in the microcomputer to be executed corresponds to the AND circuit described in the section of the above-mentioned technical means.

In the above embodiment, the opening / closing of the hot water tap (5) is judged depending on whether or not the flow rate measured by the flow rate counter (2) is "0". However, instead of the flow rate counter (2), the water flow A water flow switch that turns ON / OFF depending on the existence may be adopted. Also, while monitoring the output of the flow rate counter (2) until the measured current of the flow rate counter (2) becomes "0" (when executing the step of the reference numeral (92)), the remote controller Drawing for judging whether or not the operation device (7) is connected (see step of drawing code (80)) and waiting for one second when it is judged that the remote control operation device (7) is connected You may make it perform the step of code | symbol (81).

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a hot water supply device.

FIG. 2 is a flowchart showing the control operation of the embodiment of the present invention.

[Explanation of symbols]

 (1) ・ ・ ・ Water passage (7) ・ ・ ・ Remote control device (10) ・ ・ ・ Gas burner (72) ・ ・ ・ Run switch

Claims (1)

[Claims] 1. A water flow detector such as a flow counter or a water flow switch for detecting the presence or absence of water flow generated in the water passage (1) is provided, and after the power failure is restored, the hot water supply operation can be performed only if it is operated again. The presence or absence of the remote control operating device (7) is determined in the hot water supply device which can be used in both usage modes in which the remote control operating device (7) of the following type is connected and in which it is not connected. When the remote control operating device (7) is not connected, a remote control detection means for outputting a remote control absence signal, and an abnormality when receiving the remote control absence signal output by the remote control detection means and the water flow detection signal output by the water flow detector An AND circuit that outputs a signal is provided to maintain the gas burner (10) in a combustion prohibited state while the abnormal signal is output from the AND circuit when reenergizing after the power failure is restored. .