JPS6012986Y2 - horizontal water heater - Google Patents

Description

[Detailed description of the invention] The present invention relates to a horizontal water heater that has a horizontally long overall structure in which a burner, a combustion chamber, and a heat exchanger are successively connected in the horizontal direction. This relates to a water draining device for prevention.

Conventional water heaters are of the reverse type, and in order to realize this type of horizontal water heater, the burner, combustion chamber, and heat exchanger are horizontally connected in an airtight manner, and the exhaust gas flows through the joints. Since it is necessary to prevent leakage, a method of forced air supply and exhaust is used.

The structure of a water heater conventionally disclosed in Japanese Utility Model Application Publication No. 49-37851 will be explained with reference to FIGS. 1a and 1b.

1 is a water supply connection port, 2 is a hot water supply port, 3 is a hot water supply pipe, 4 is a combustion section including a burner, 5 is a combustion chamber, and 6 is a fin block provided in the middle of the hot water supply pipe.

Here, the hot water supply pipe 3 is wound around the outer periphery of the combustion chamber 5.

The combustion gas raw in the combustion section 4 passes through the combustion chamber 5, undergoes heat exchange with a fin block 6 provided in the middle of the hot water supply piping 3, and is discharged to the outside air.

By arranging the combustion section 4, combustion chamber 5, and engine 6 vertically one after another in this way, and wrapping the supply island piping 3 around them, the degree of freedom in installation is increased and space can be used effectively. When installed horizontally for this purpose, each component must be connected in an airtight manner and a forced intake/exhaust system must be used, as described above.

Furthermore, if a drain valve A for preventing freezing is installed in the middle of the hot water supply piping 3 in the case of a vertical type as shown in Fig. 1, most of the water in the piping can be drained out. If it is installed horizontally as it is, the water that has accumulated in the hot water supply pipe 3 along the bottom surface of the combustion chamber 5 will not be discharged, and the water that has accumulated here will freeze and damage the hot water supply pipe 3 and its joints. There is a problem.

Therefore, the technical problem of this invention is to make it possible to drain water from the hot water supply piping along the bottom surface of the combustion chamber when the burner, combustion chamber, and heat exchanger are installed horizontally. A technical means of the present invention to solve this technical problem is as follows.

In other words, as described above, the burner, combustion chamber, and heat exchanger are installed in a horizontally airtight manner, and in addition, water drainage piping is installed below the combustion chamber within the hot water supply piping that runs along the bottom surface of the combustion chamber. It is a communication of

This technical means has the following effects.

(1) By realizing a horizontal water heater, the degree of freedom in installation increases, and it becomes possible to install it in a space that was previously a dead space, allowing for effective use of space.

(2) Holes were formed in all of the hot water supply piping that was wound in the vertical direction along the bottom surface of the combustion chamber, and these holes were communicated with one drainage pipe. By leading the water drain pipe downward, you can easily drain water to prevent freezing without having to reach high places.

Moreover, since there is no need to operate at multiple locations, there are no accidents such as forgetting to close the drain plug.

(3) By simply connecting the drain pipe to the conventional hot water supply pipe, it can be used in a horizontal water heater, parts can be shared, and costs can be reduced.

An embodiment of the present invention will be described below with reference to FIGS. 2 to 4.

FIG. 2 shows an embodiment of the horizontal gas water heater of the present invention.

In the figure, 7 is the main body casing of the water heater, in which the air blown by the air supply/exhaust fan 8 is installed so that it is mixed with gas in the mixing pipe 9. Burners 10 are connected and installed laterally in a sealed state.
, a combustion chamber 11, a heat exchanger 12, and an exhaust hood 13 are housed therein, and combustion exhaust gas is supplied and exhausted through an exhaust stack 14 and fresh air through an intake cylinder 15.

Fuel gas is supplied from the gas inlet 16 to the solenoid valve 17 and the gas governor 1.
8. The gas is supplied to the low pressure part of the mixing pipe p through the solenoid valve 19 through the gas conduit 20, but the high pressure of the mixing pipe 9 is passed through the bypass pipe 21.
This feeds back the gas to the governor 18 and supplies the gas so that the air-fuel ratio remains constant.

・. On the other hand, water supplied from the water supply connection port 22 passes through the water valve 23 and hot water supply pipe 24, enters the fin block 12, absorbs heat, and is supplied from the hot water connection port 25.

A switch 26 that operates in conjunction with the water valve 23 is provided to control the blower 8, solenoid valve 17, igniter, etc., and controls the combustion chamber 1.
A pilot burner 27 provided at 1 can be ignited.

28 is a water supply pipe connected to a part of the hot water supply pipe 24 along the lower surface of the combustion chamber 11.

FIG. 3 shows a remote control operation unit provided outside the main body, in which a power switch 29, a temperature adjustment 30, an electric control circuit 31, etc. are provided in a control box 32.

Now, when the power switch 29 is turned on to start hot water supply, the blower 8, igniter, and solenoid valve 11 are sequentially controlled by the switch 26 that is linked to the water valve 23, the pilot burner 27 is ignited, and its combustion is detected, and the solenoid valve 19 is opened, and the premixed mixture in the mixing tube is combusted in the flame hole of the burner 10 covered by the combustion chamber 11, heat exchanged in the fin block 12, and hot water is supplied.

. Furthermore, the hot water temperature is detected by a thermistor or the like by setting the control circuit 31 and the hot water temperature setting dial 30, and the air volume is controlled by controlling the rotation speed of the blower 8. The gas amount changes according to the air volume, so the hot water temperature Adjustment is possible.

FIG. 4 shows a detailed diagram of the main parts of the horizontal gas water heater of the present invention.

On the lower surface side of the combustion chamber 11, a water draining pipe 28 is connected to the entire lowermost part of the hot water supply pipe 24 which is vertically wound around the outer circumference of the combustion chamber 11.

,' Since the water drain pipe 28 is provided at the bottom in this way, all the water remaining inside the hot water supply pipe 24 flows into the water drain pipe 28 and is discharged outside the appliance, preventing damage due to freezing. It can be prevented.

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[Brief explanation of the drawing]

'Figure 1a is an overall view of a conventional water heater, b is an enlarged sectional view of a part of the water draining device, and Figure 2 is a configuration diagram showing an embodiment of the horizontal gas water heater of the present invention. Figure 3 shows the control hook.
FIG. 4 is a perspective view showing an embodiment of the main part of the horizontal gas water heater of the present invention. 10... Burner, 11... Combustion chamber, 1
．． 2... Heat exchanger, 24...□... Piping for hot water supply, 28... Piping for draining water.

Claims (1)

[Scope of utility model registration request] A burner, a combustion chamber, and a heat exchanger are arranged in a horizontally air-tight manner.1. It has a means for forcibly supplying and exhausting combustion air, and has a hot water supply pipe connected to the heat exchanger that is vertically wound around the outer circumference of the combustion chamber. A horizontal water heater in which a water draining pipe provided below the combustion chamber is communicated with the hot water supply pipe 3 along the line.