JPH0212334B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an instantaneous water heater that automatically controls switching capacity to hot water supply function.

Conventionally, this type of device has been known to manually switch the hot water supply capacity into three stages.
-77654), but with this type of valve, the capacity switching valve has a complicated structure, and furthermore, there are inconveniences such as explosion ignition due to flame transfer and non-ignition during switching, and user inconvenience due to manual switching. had.

The purpose of the present invention is to provide an instantaneous water heater that eliminates such inconveniences.The main solenoid valve 1, the small heat solenoid valve 2, and the medium heat solenoid valve 3 are used to open and close the gas passage main body 4. The gas separation manifolds 5, 5' are connected to the switching burners 6, 6', and the water passage 7 is connected to the remote control 10 and the main control section 9 through the on-off electrical circuit of the flow rate switch 8. Then, the remote control 10 performs automatic ignition control of the instantaneous water heater, and controls the gas passage main body 4 using the solenoid valves 1, 2, and 3 in devices such as thermal power adjustment A, abnormality monitoring B, and alarm C. The opening/closing operation of the gas separation manifolds 5, 5' communicates with the switching burners 6, 6'. Through connection, the remote control 10 performs automatic ignition control of the instantaneous water heater and gas passage opening/closing control, and also controls fire power adjustment A, abnormality monitoring B, and alarm C.
In an instantaneous water heater consisting of a device such as the above, the gas separation manifold 5, 5' is configured in a flange type and is placed opposite the switching burner 6, 6', and the two solenoid valves 2,
3 and the main solenoid valve 1 are connected to the gas passage main body 4, and the two solenoid valves 2 and 3 are connected to the gas extraction members 12 and 12 with a uniform distance between them, and the gas separation manifolds 5 and 5' are connected to each other. is the separator plate 1
3 was internalized to form a separation and distribution structure to eject gas.

Next, one embodiment of the present invention will be explained with reference to the attached drawings.

FIG. 1 is a block diagram of a stop-start instantaneous water heater, which is an example of the present invention, in which water is heated in a heat exchanger 16 through a water passage 7, a running water switch 8, and a temperature control valve 15. Hot water is dispensed via a boil prevention switch 17 at a hot water tap (not shown). A main solenoid valve 1 is connected to the gas intake port 4' via a gas governor 11, and a pilot burner 18 is connected to the switching burners 6, 6' via a pilot solenoid valve 19. Two small heat power solenoid valves 2 and a medium heat power solenoid valve 3 are connected in parallel from the gas governor 11 to the gas passage main body 4, and the distance to the gas separation manifolds 5 and 5' is uniformed by the gas extraction members 12 and 12. The switching burners 6 and 6' are connected to each other so as to maintain the same. Note that the gas separation manifold 5 has a separator plate 13.
is internalized.

18 is a pilot burner, spark plug 21,
Detection elements 20 are arranged to face each other. 9 is a remote control 1 that can be operated externally from the main control unit.
Connect to 0.

FIG. 2 is a block diagram of a control circuit according to an example of the present invention, and its operation begins by energizing transformers T1 and T2 via fuse F when the power is turned on. P is a power switch, and when it is turned on, rectifier D and flame detection circuit E are operated. Next, when the water volume switch 8 opens a hot water tap (not shown), the circuit is closed (ON) and the relay R1 and timer 1G2 are activated. Relay R1 is always held at contact b,
The main solenoid valve 1, the pilot solenoid valve 19, and the ignition circuit I are electrically connected, and the ignition circuit I is stopped by the ignition confirmation signal from the flame detection circuit E. Connected to contact a by relay R2, remote control 10
According to the thermal power adjustment selection A, when the "small thermal power" push button switch is pressed, the solenoid valve 2 opens and the pilot burner 18 performs a small combustion.
When the "medium heat power" push button switch is pressed, the solenoid valve 3 opens and the pilot burner 18 performs medium combustion. When the "large fire power" push button switch is pressed, the solenoid valve 2 opens, the timer 1G1 starts working, and after a delay of 1 second, the contact G1a comes into contact and the solenoid valve 3 opens, resulting in a fully ignited combustion state. When the hot water tap is turned off, the main solenoid valve 1, pilot solenoid valve 19, and each solenoid valve 2, 3 are opened by opening the flow rate switch 8.
The combustion is stopped by closing the valve. L1 is a power lamp, and L2 is a flame detection lamp. H is a buzzer, and when the flame detection circuit E cannot detect it (misfire), when the flame does not ignite, or when the boiling prevention switch 17 due to overheating is opened, the relay R1 is connected to the contact a and generates an alarm. did.

As described above, according to the present invention, when the instantaneous water heater is ignited, the opening/closing circuit of the flow rate switch 8 interposed in the water channel 7 is used, and the remote control 10 is used to ignite the instantaneous water heater at a place separated from the instantaneous water heater. Automatic ignition control, small, medium, and large fire power adjustments, abnormality monitoring, and alarms are provided for the convenience of the user.The three-stage fire power control for fire power adjustment allows the solenoid valve to be opened and closed independently, It can produce fire or small firepower, and if opened and closed at the same time, it can be controlled in three stages with large firepower. Also,
Separation plate 13 embedded in gas separation manifold 5
The combustion amount can be selected in three stages by configuring two unequal large and small chambers, and the switching burner 6,
Connection to 6' is also simple as a flange configuration,
Assembly with the gas passage main body 4 is also facilitated. moreover,
The ignition when selecting the hot water temperature for the large fire is the small fire solenoid valve 2.
By making sure to delay the opening operation of the medium-heat solenoid valve 3 (about 1 second) to prevent explosive ignition when a large amount of gas is ignited at the same time, safe delayed ignition is performed to achieve slow ignition. It is effective.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one example of the present invention, and FIG. 2 is a block diagram of its control circuit. 1... Solenoid valve (main solenoid valve), 2... Solenoid valve (low heat solenoid valve), 3... Solenoid valve (medium heat solenoid valve), 4...
Gas passage main body, 4'...Gas intake port, 5, 5'...Gas separation manifold, 6,6'...Switching burner, 7...
Water passageway, 8...Flow rate switch, 9...Main control section, 10...Remote control, 11...Gas governor, 12...Gas extraction member, 13...Separator, 14
...Igniter, 15...Temperature control valve (temperature control shaft), 16
...heat exchanger, 17...boiling prevention switch, 18...pilot burner, 19...pilot solenoid valve, 20
...Flame detection element, 21...Spark plug, A...Firepower adjustment, B...Abnormality monitoring, C...Alarm, D...Rectifier, E...
Flame detection circuit and relay (Eab), F...Fuse,
G1...Timer 1, G2...Timer 2, H...Buzzer, I...Ignition circuit, R1...Relay 1, R2...Relay 2, T1, T2...Transformer, L2...Power lamp, L2...Flame detection lamp, P...Power switch .

Claims (1)

[Scope of Claims] 1. In an instantaneous water heater, solenoid valves 1, 2, and 3 open and close a gas passage main body 4 and communicate with switching burners 6 and 6' via gas separation manifolds 5 and 5'. Automatic ignition control of the instantaneous water heater and opening/closing control of the gas passage are performed by connecting the water passage 7 to the remote control 10 and main control unit 9 via the opening/closing circuit of the flow rate switch 8. In addition, the remote control 10 is used in an instantaneous water heater consisting of devices such as thermal power adjustment A, abnormality monitoring B, alarm C, etc., and the gas separation manifolds 5 and 5' are configured in a flange type and are connected to switching burners 6 and 6'. Set up oppositely,
The two solenoid valves 2 and 3 are connected to the gas passage main body 4 to which the main solenoid valve 1 is connected, and the gas extraction members 12 and 12 are connected to the two solenoid valves 2 and 3 at a uniform distance, and the gas separation Manifold 5,
An instantaneous water heater characterized in that a separator plate 13 is incorporated in 5' to form a separation and distribution structure to eject gas. 2 A delayed ignition part circuit is interposed in the main control part 9, and when igniting, the coils of the small or medium-power solenoid valves 2 and 3 are energized to activate the igniter 14 according to the temperature selection of the remote control 10, but if there is a large fire According to claim 1, the ignition is delayed so that the opening operation of the medium-heat solenoid valve 3 is always delayed than that of the small-heat solenoid valve 2. Instant water heater.