JPH0224024Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a heat exchange device suitable for use as, for example, a bathtub with a bathtub.

[Prior Art] Hot water convection type gas baths, which are constructed by connecting a hot water kettle placed close to the bathtub and the bathtub with two very short hot water circulation pipes, are widely used in general households.

[Problems to be solved by the invention] Gas baths with the above configuration require that the bathtub and kettle be installed close to each other, so installation may be difficult in terms of space, and there may be problems with the safety of combustion exhaust gas. It may also be accompanied by emission problems.

Therefore, a gas bath that applies the principle of a siphon has been proposed, but it has the disadvantage that the pot is easily destroyed when the bath is heated dry, and it can only be used as an auxiliary heat source.

The purpose of the present invention is to provide a siphon type heat exchange device that has sufficient durability without using expensive heat-resistant materials for the kettle, and has a structure that will not cause damage even if the kettle is left unheated. It is in.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a burner in a kettle having a water jacket to prevent water from running dry, and a water level sensor when the water is full and a water level sensor when the water is low. A hot water generating section disposed on a wall, a hot water reservoir disposed at a required distance from the water boiler, and a passageway having an opening located below the surface of the water filled in the water boiler and the hot water reservoir. A configuration comprising a water pipe and a control device for opening and closing a solenoid valve interposed in a fuel supply piping path to the burner based on signals from each of the water level sensors, and for igniting and extinguishing the burner is adopted. .

[Operation and Effects of the Invention] (Operation) The temperature of the water in the hot water storage section is raised as follows.

1 Pour water into the hot water storage and kettle.
The water level in the kettle is between the full water level sensor and the low water level sensor, and the water pipe is filled with water to function as a siphon.

2 The control device opens the solenoid valve and ignites the burner to heat the water in the kettle.
As the water vapor pressure increases, the hot water in the kettle moves through the water pipe to the hot water reservoir.

3. When the hot water level in the kettle falls to the position of the low water level sensor, the control device closes the solenoid valve and extinguishes the burner. Atmospheric pressure causes the hot water in the hot water reservoir to return to the kettle.

4 When the hot water level in the water boiler rises to the position of the full water level sensor, the control device opens and closes the solenoid valve and ignites the burner, so that even with the increased water vapor pressure, the hot water in the water boiler flows through the water pipe to hot water. Move to reservoir.

5 Steps 3 and 4 above are repeated.

(Effect) A. The liquid level of the hot water (water) in the kettle will not drop below the water level sensor installation position when the water is low.
There is always hot water left in the kettle, so there is no need to leave the kettle empty. Also, due to the presence of hot water (water) in this pot,
Sufficient durability can be obtained without using expensive heat-resistant materials for the kettle.

(b) Even if the water boiler were to run dry due to a malfunction of the water level sensor, the kettle will not be damaged because it has a water jacket to prevent it from running dry.

[Example] Hereinafter, the siphon type heat exchange device of the present invention will be specifically explained based on the accompanying drawings.

FIG. 1 is an explanatory diagram of the overall configuration of a siphon type heat exchange device as an example of a domestic gas bath, in which 1 is a water boiler as a hot water generating section, 2 is a bathtub as a hot water storage section, and 3 is a water boiler. 1 is a water pipe for communicating the lower part of the water surface with the bathtub 2; 4 is a gas burner serving as a heating means for the kettle 1 serving as a heat exchange water tank; and 5 is a cylindrical exhaust passage rising up through the water tank. 6 is a water jacket attached to the flue 5 so as to surround the flue 5, the top end of which is located at a position somewhat lower than the water level when the water tank is full, and opens into the water tank. , which serves as the inlet for water. 14 is a water circulation pipe for heat exchange with a plurality of fins installed so as to bridge the recess formed at the bottom of the water boiler 1; 15;
1 is a baffle plate inserted in the flue 5 to increase thermal efficiency, and 16 is an exhaust pipe.

On the side wall of the kettle 1, there is a pot 1 as a water tank.
Sensors 8 and 9 are installed near the water surface when the water is full and the water surface when the water is at its lowest, respectively. Also 1
1 is a solenoid valve interposed in a gas supply pipe 12 to the burner 4, and 10 is a control amplifier as a control device for opening and closing the solenoid valve 11 based on signals from two water level sensors 8 and 9. 13 is a water supply valve, and 7 is water.

Next, to explain the operation of the siphon type heat exchange device of the present invention, first, there is a water supply valve 1 in the water boiler 1.
3 and the water faucet attached to the bathtub 2, respectively. Boiling of water begins by igniting the burner 4, and as the water temperature and the temperature of the pot 1 itself rise, the water vapor pressure exerted on the water surface in the pot 1 gradually increases. The hot water in the pot 1 is forcibly moved into the bathtub 2 through a water pipe 3. When the water level in the pot 1 drops to the position of the low water level sensor 9, the control amplifier 10 as a control device issues a command based on the signal from the sensor 9, closes the solenoid valve 11, and turns on the gas burner 4. extinguish the fire. The steam that has been heating and expanding and occupying the expanded space inside pot 1 is cut off from heat supply and cools and contracts, causing this space to fall into a depressurized state.
The water in the bathtub 2, which is in communication with the water remaining therein via the water pipe 3, is pushed by atmospheric pressure and flows back into the pot 1. When the water level in the pot 1 rises to the position of the full water level sensor 8, the control amplifier 1
0 opens the solenoid valve 11, so that the burner 4 is ignited again by the flame of the pilot burner, which is always lit. In order to maintain the water level of the pot 1 at the set position when the water is full, appropriate means can be taken such as opening and closing a communication valve with outside air attached to the top of the pot 1 in response to a signal from the water level sensor 8.

By repeatedly transferring heat between the hot water generating section and the hot water storage section as described above, the temperature of the water in the bathtub 2 as the hot water storage section is rapidly increased. In the above embodiment, the water jacket 6 is attached to the entire circumference surrounding the flue 5, but it may be provided partially in consideration of the efficiency of electric heating to the aquarium water, or it may be attached to the peripheral wall of the pot 1. It may be installed along the As the water level sensors 8 and 9, in addition to a float switch, a capacitance type, a phototube type, a translucent type, etc. can be used.

In the above embodiment, a gas burner is used as the burner and gas is used as the fuel, but a configuration using fuel other than gas may be used.

In addition, as a specific example of a siphon type heat exchange device,
In the above embodiment, a household gas bath was used, but it can of course also be used for other purposes such as heating solutions or aqueous solutions of various industrial liquid raw materials.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the overall configuration of a siphon type heat exchanger according to the present invention. In the figure, 1...Kettle, 2...Bathtub (hot water storage part), 3...Water pipe, 4...Gas burner (burner), 6...Water jacket, 7...Water,
8...Water level sensor at full water level, 9...Water level sensor at low water level, 10...Control amplifier (control device),
11... Solenoid valve, 12... Gas supply pipe line (fuel supply pipe line).

Claims (1)

[Scope of Claim for Utility Model Registration] A hot water generating section in which a burner is arranged in a kettle having a water jacket for preventing dry heating, and a water level sensor when the water is full and a water level sensor when the water is low are arranged on the wall of the kettle; a hot water storage section arranged at a necessary distance from the hot water storage section; a water passage pipe arranged so that its opening is located below the water surface of the water heater and the hot water storage section; and a fuel supply pipe interposed in the burner 1. A siphon type heat exchange device comprising: a control device for opening and closing a solenoid valve based on signals from each of the water level sensors, and for igniting and extinguishing the burner.