JPS60213731A - Combustion controlling device of bath burner - Google Patents

Abstract

PURPOSE:To set the temperature of hot water, bring a device into operation, rapidly heat bath water to a desired temperature, and maintain the temperature of hot water to a constant value, by a method wherein, by means of a signal from a temperature sensor, an ignition sequence circuit is controlled by a trouble detecting circuit, a hot water temperature detecting circuit, and a timer circuit. CONSTITUTION:By means of a signal from a temperature sensor 2, a trouble detecting circuit 13 decides the presence of a trouble on the temperature sensor 2, and a hot water temperature detecting circuit 15 measures the temperature of water (hot water) to transfer water temperature data to a timer circuit 14. The timer circuit 14 calculates a combustion time, in which bath water is heated to a heated bath water temperature, based on a hot water amount data from a hot water amount change-over switch 12, and counts a time commencing with a combustion starting time. Continuous combustion is effected only during a time calculated by the timer circuit 14. When continuous combustion is stopped through the working of the timer circuit 14, the hot water temperature circuit 15 compares a heated bath-water temperature from the temperature sensor 2 with a combustion stop temperature set by a hot water temperature control volume 11, and when the heated bath water temperature from the temperature sensor 2 exceeds the combustion stop temperature, combustion is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to automatic operation in gas bathtubs.

Structure and Problems of Conventional Examples In conventional gas bath boilers, it was necessary to manually turn on the operation switch to boil water, and then turn off the operation switch when the water reached a suitable temperature to stop combustion. As time passed, the temperature of the hot water started to drop, and it was necessary to reheat the water.

Additionally, some devices require 7L of IL to be placed in the bathtub for the sensor, which is inconvenient.

Purpose of the Invention The present invention solves the above-mentioned drawbacks of the conventional gas bath pot. The purpose is to improve usability.

Structure of the Invention In order to achieve the above object, the combustion control device for a bathtub according to the present invention performs ignition and combustion by supplying DC power to an ignition sequence circuit, and the DC power is supplied with a signal from a temperature sensor. A hot water temperature detection circuit, a timer circuit,
This configuration is controlled by an abnormality detection circuit.

With the above configuration, the boiling temperature can be quickly raised to the set temperature and the temperature can be kept constant for a long time.

In addition, all operations will stop if the heating is empty or the temperature sensor fails.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, a controller 1 is a hot water temperature regulator.

It has a built-in system 17, a hot water amount selector switch, and an operation switch.

When the operation switch 13 is turned on, the ignition operation starts if the water temperature is at the set temperature. When the closing valve IV valve 3 is opened, the pilot burner 5 is ignited, and after confirming that the pilot burner 5 has been ignited, the ignition valve 4 is opened and the main burner 6 is ignited. The heat exchanger 7 is heated by the main burner 6 and boils the bath. The temperature sensor 2 then measures the water temperature (hot water temperature) via the heat exchanger 7.

Next, in FIG. 2, a hot water temperature adjustment volume 11, a hot water amount changeover switch 12, an abnormality detection circuit 13, a timer circuit 14, a hot water temperature detection circuit 15, and an operation switch 16 are built into the controller 1. ing.

When the hot water flow selector switch 12 is set according to the bathtub and the operation switch is turned on, the abnormality detection circuit 13 determines whether or not there is a failure in the temperature sensor 2 based on the signal from the temperature sensor 2.
The hot water temperature detection circuit 15 measures the water temperature (water temperature) and notifies the timer circuit 14 of the water temperature. The timer circuit calculates the combustion time to the boiling temperature based on the water temperature and the hot water amount data from the hot water amount changeover switch 12, and counts the time from the start of combustion. The DC power is applied to the ignition sequence circuit 9 via the abnormality detection circuit 13, timer circuit 14, and hot water temperature detection circuit 15 to start IL combustion. and timer circuit 1
Continuous combustion is performed for the time n calculated by 4. When the continuous combustion by the timer circuit 14 stops, the hot water temperature detection circuit 15
The boiling temperature from the temperature sensor 2 is compared with the combustion stop temperature set by the hot water temperature regulating polymer 11, and if the boiling temperature from the temperature sensor 2 is higher, combustion is stopped. .

Furthermore, if the boiling temperature detected by the temperature sensor 2 is low, combustion continues until the temperature rises. After the combustion has stopped, if the boiling temperature detected by the temperature sensor 2 is lower than the combustion start temperature set by the hot water temperature control point 11, combustion starts. When the temperature reaches a certain combustion stop temperature, combustion stops again. Also, timer circuit 1
When the temperature detected by the temperature sensor 2 reaches the overheating prevention temperature set by the hot water temperature control polymer 11 during continuous combustion by the 4-operation, the continuous combustion by the tie->circuit 14 is stopped. Also, when the iVB pumping temperature from the temperature sensor 2 rises rapidly during combustion, the abnormality detection circuit 13 measures the temperature rise per unit time, determines that the combustion is dry, and stops all operations.

Effects of the Invention As described above, according to the present invention, by setting the hot water amount selector switch 12 to the desired bath temperature, the hot water can be quickly heated to the desired level and the temperature can be maintained at a constant level. Furthermore, since failure of the temperature sensor 2, dry heating, and overheating can be detected, the usability of the bathtub is significantly improved, and safety is also improved.

4. Brief Description of the Drawings FIG. 1 is a block diagram of a control device according to an embodiment of the present invention, and FIG. 2 is a block diagram of the same control device.

1... Controller, 2... Temperature sensor, 9
'...Ignition sequence circuit, 10...
DC power supply, 11... Hot water temperature adjustment volume, 12
・・・・・・Water flow rate selection switch, 13・・・・Abnormality detection circuit, 14・・・・Timer circuit, 15・・・・
...Water temperature detection circuit.

Name of agent: Patent attorney Toshio Nakao and 1 other person 1 illustration

Claims (1)

[Scope of Claims] (1) An ignition sequence circuit for igniting and extinguishing the bathtub, a power supply circuit, a temperature sensor for measuring water temperature, and abnormality detection for detecting failure, dry heating, and overheating of the temperature sensor. circuit, a water temperature detection circuit that detects the water temperature, a timer circuit that calculates and controls the combustion time, a water temperature adjustment volume that sets the boiling temperature, and a water amount changeover switch, and the ignition sequence circuit. A combustion control device for a bathtub, wherein control is performed by the abnormality detection circuit, the hot water temperature detection circuit, and a timer circuit based on a signal from the temperature sensor. +21 The combustion control device for a bathtub according to claim 1, wherein combustion is stopped when the water temperature reaches a set temperature, and combustion is automatically started when the water temperature decreases. (3) The combustion control device for a bathtub according to claim 1, wherein one temperature sensor is attached to the heat exchanger to detect and control the water temperature. (41) The initial water temperature is measured by the hot water temperature detection circuit, and the combustion time to reach the set temperature is calculated by the timer circuit. The combustion control device for a bath kettle according to claim 1, which is configured to perform forced combustion. (5) The scope of the present invention is characterized in that the abnormality detection circuit measures the rate of change of temperature data from the temperature sensor per unit time, compares it with a set value, determines nitrogen burning, and stops all operations. Combustion control device for a bath boiler according to paragraph 1. (6) When the temperature data from the temperature sensor exceeds a temperature determined by the temperature data of the hot water temperature control volume.
Preferably, the bath kettle according to claim 1 is configured such that the abnormality detection circuit stops the forced combustion by the timer circuit and shifts to the combustion control of the bath kettle according to claim 2. Combustion control device.