JP3024840B2 - Water heater - Google Patents

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 for heating water by burning fuel such as gas or petroleum, and relates to control for enabling use even after water has entered.

[0002]

2. Description of the Related Art A water heater 6, which is a conventional water heater, is shown in FIG.
This will be described with reference to FIG. 1 is a fuel controller, 2 is a burner, 3 is a combustion fan, 4 is a water flow controller, 5 is a heat exchanger, 6 is a water heater, 7 is a controller, 8 is an exhaust pipe, 12 is a case, and 13 is air supply. Mouth. At the time of hot water supply, the fuel controlled by the fuel controller 1 and the air sent from the air supply port 13 opened to the case 12 by the combustion fan 3 are burned by the burner 2. The water controlled by the water amount controller 4 is heated by the combustion gas in the heat exchanger 5 and becomes hot water to be supplied. Controller 7
Is the fuel controller 1 electrically connected as shown by the dotted line,
Each of the combustion fan 3 and the water amount controller 4 was controlled to a predetermined water amount and hot water temperature.

[0003]

In recent years, a hot water supply device may be installed in the basement or the like from the viewpoint of an installation space or the like. There is a problem that water enters through the air supply port 13 to damage the controller 7 and cannot be reused.

[0004] The present invention solves the above-mentioned conventional problems, and makes it possible to reuse a water heater installed underground, even if it is submerged, and to use it even when submerged. The purpose is to do.

[0005]

In order to solve the above-mentioned problems, the present invention provides a fuel controller for controlling fuel, a combustion fan for feeding combustion air, a burner for burning fuel, and a heat exchange between combustion gas and water. A heat exchanger, a water flow controller that controls the amount of water sent to the heat exchanger, a water heater that is located downstream of the heat exchanger, and is composed of an exhaust pipe that discharges combustion gas. A case, a water detector at the lower part of the waterproof case for detecting intruding water, an occluder at the lower part of the exhaust stack to stop the flow of exhaust gas, and a water detector at the lower part of the waterproof case that detects water in the waterproof case. A controller that receives a signal to stop burning the burner and sends a control signal to the closing device to close the exhaust stack.

Further, a waterproof case is provided which has the water heater therein, has an air supply cylinder for supplying combustion air above and has an opening at the bottom, and a water detector at the lower portion of the waterproof case for detecting water entering therethrough. And an occluder at the bottom of the waterproof case that closes the opening to stop water intrusion, and receives a signal from a water detector that detects water in the waterproof case to set the burner combustion to submerge mode, And a controller for sending a control signal for closing the control signal.

[0007]

The water heater is controlled by the controller, the fuel controlled by the fuel controller and the combustion air sent from the combustion fan are burned by a burner, and the water controlled by the water amount controller is used as a heat exchanger. Exchange heat and provide hot water. If rainwater or the like enters below the sea level and enters, the controller detects the intrusion of water by the water detector below the waterproof case, stops the combustion, and then closes the exhaust stack with the obstructor.
By closing the exhaust pipe, the waterproof case is in a sealed state, and it is possible to prevent water from entering the water heater even when submerged.

In the case where a water supply cylinder is provided, combustion air is supplied from an opening of the intake cylinder and a lower portion of the waterproof case to perform combustion. However, when submerged, water enters by a controller using a water detector below the waterproof case. Is detected, and the opening at the lower part of the waterproof case is closed by the closing device, and the burner is controlled to burn in the submerged mode. As a result, the waterproof case is in a sealed state, and can be operated even when submerged by supplying combustion air from an air supply cylinder and exhausting combustion gas from an exhaust cylinder.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the hot water supply apparatus of the present invention will be described with reference to FIG. 1 and a second embodiment will be described with reference to FIG. The same parts as in the conventional example of FIG. 3 are denoted by the same reference numerals, detailed description thereof will be omitted, and different parts will be mainly described. In FIG. 1, 9 is a water detector, 10 is a waterproof case, 10a is a waterproof case 10
, 11 is an obturator of the exhaust stack 8, 14 is on the ground,
Reference numeral 15 denotes an exhaust chamber, in FIG. 2, 8 'denotes an intake cylinder, and 11' denotes an obturator having an opening 10a.

In the first embodiment, the water heater 6 includes a fuel controller 1, a combustion fan 3, a burner 2 for burning fuel,
Water flow controller 4 and heat exchanger 5 for exchanging heat between combustion gas and water
And an exhaust pipe 8 downstream of the heat exchanger 5 for discharging combustion gas. Further, the water heater 6 has openings 10a at both ends of the lower surface.
The water detector 9 is provided in a waterproof case 10 having a water detector 9 at a lower portion of the waterproof case 10 and close to an opening 10a. An obturator 11 for closing the exhaust stack 8 is provided to stop the flow.

The water heater 6 installed underground is controlled by the controller 7 as follows. That is, the fuel controlled by the fuel controller 1 and the combustion air sent from the combustion fan 3 are burned by the burner 2, and the water controlled by the water amount controller 4 is heat-exchanged by the heat exchanger 5, Provide hot water. The exhaust gas after the heat exchange is exhausted from the exhaust pipe 8. Then, when rainwater or the like is installed underground and water enters, the water detector 9 detects water that is about to enter the waterproof case 10 through the opening 10 a and sends a detection signal to the controller 7. And
The controller 7 receiving this detection signal controls the fuel controller 1 to stop the combustion of the burner 2, and then controls the closing device 11 to close the exhaust pipe 8. As described above, by closing the exhaust pipe 8, the waterproof case 10 is sealed, and the volume of air sealed at the time of submersion is reduced by the water pressure increase.
Water is prevented from entering the water heater 6. Therefore, even if the installation location of the water heater is completely submerged, the water heater 6 can be used immediately if water is removed. Further, since the waterproof case 10 surrounds the water heater 6, it is effective for soundproofing and fire prevention. In the embodiment, the exhaust pipe 8 is formed in a chimney shape. However, the same effect can be obtained by using a conventional exhaust pipe.

Next, in the second embodiment, the water heater 6 has the same structure as that of the first embodiment, and is connected to an exhaust pipe 8 projecting above the ground 14. Further, the water heater 6 is housed in a waterproof case 10 having openings 10a at both ends on the lower surface, and the upper part of the waterproof case 10 is connected to an air supply cylinder 8 'projecting above the ground 14. A water detector 9 is provided at a lower portion of the waterproof case 10 and is close to the opening 10a, and a closing device 11 'for closing the opening 10a so as to stop water from entering is provided.

The water heater 6 installed underground is controlled by the controller 7 as follows. That is, the fuel controlled by the fuel controller 1 and the combustion air supplied from the supply cylinder 8 ′ and the opening 10 a by the combustion fan 3 are burned by the burner 2. At this time, the combustion air from the opening 10a has an effect of cooling the waterproof case and the like. Next, the water controlled by the water amount controller 4 is heat-exchanged in the heat exchanger 5 to provide hot water, and the exhaust gas after the heat exchange is exhausted from the exhaust stack 8. Then, when rainwater or the like is installed underground and water enters, the water detector 9 detects water that is about to enter the waterproof case 10 through the opening 10 a and sends a detection signal to the controller 7. And
The controller 7 receiving this detection signal controls the closing device 11 'to close the opening 10a, and then controls the combustion fan 3 to operate the combustion in the submerged mode. That is, the capacity of the combustion fan is increased so as to supplement the combustion air resulting from the closing of the opening 10a. By closing the opening 10a in this manner, the waterproof case 10 is in a sealed state, and prevents water from entering the water heater 6 when submerged. Therefore, even if the installation location of the water heater is completely submerged, the water heater 6 can be used if the air supply cylinder 8 'and the exhaust cylinder 8 are not submerged.
Also, since the waterproof case 10 wraps the water heater 6,
Effective for sound and fire protection.

[0014]

According to the above configuration, the present invention can expect the following effects. (1) When the water heater is wrapped in a waterproof case and water is detected by the water detector, the combustion is stopped and the exhaust pipe is closed by the blocker, preventing water from entering the water heater and submerging the water. Also allows for reuse. Further, when intrusion of water is detected by the water detector, combustion is stopped immediately, so that no toxic gas is generated when submerged. (2) It has a supply cylinder and an exhaust cylinder protruding above the ground, and closes the opening of the waterproof case when submerged, so that the supply air can be operated even when submerged. (3) Since the water heater is wrapped in a waterproof case, device noise can be suppressed lower than before, and the risk of fire when the heat exchanger is damaged can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view of a water heater according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a water heater according to a second embodiment of the present invention.

FIG. 3 is a sectional view of a conventional water heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fuel controller 2 Burner 3 Combustion fan 5 Heat exchanger 6 Water heater 7 Controller 8 Exhaust pipe 9 Water detector 10 Waterproof case 11 Closer

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Mitsuo Namba 2-16-4 Tadao, Machida-shi, Tokyo Inside the High Pressure Gas Safety Association Liquefied Petroleum Gas Laboratory (56) References JP-A-62-726 (JP, A) Japanese Utility Model Showa 60-7566 (JP, U) Japanese Utility Model Showa 50-70529 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F23L 13/00 F24H 1/00 F24H 9/02 301

Claims (2)

(57) [Claims] 1. A fuel controller for controlling fuel, a combustion fan for sending combustion air, a burner for burning fuel, a heat exchanger for exchanging heat between combustion gas and water, and a water amount for controlling the amount of water sent to the heat exchanger. A water heater downstream of the controller and the heat exchanger and composed of an exhaust pipe for discharging combustion gas, a waterproof case having the water heater therein and having an opening at the bottom, and water entering at a lower portion in the waterproof case. A water detector that detects the flow of water, an occluder at the bottom of the exhaust stack that stops the flow of exhaust gas, and stops the burner combustion upon receiving a signal from the water detector that detects water in the waterproof case. A hot water supply device comprising: a controller that sends a control signal for closing the exhaust stack. 2. A waterproof case in which a water heater is provided and which has an air supply cylinder for supplying combustion air at an upper portion thereof and has an opening at a lower portion, and a water detector at a lower portion in the waterproof case for detecting water entering therethrough. An occluder at the bottom of the waterproof case that closes the opening to stop water intrusion, and receives a signal from a water detector that detects water in the waterproof case, sets the burner combustion to submerge mode, A hot water supply device comprising: a controller that sends a control signal for closing the hot water supply device.