JPH0635898B2 - Water heater - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater equipped with a neutralizing device for neutralizing condensed water generated in an auxiliary heat exchanger.

2. Description of the Related Art A conventional water heater of this type has a structure as shown in FIG. That is, the combustion gas burned in the burner 1 is discharged to the outside of the machine by the combustion fan 5 via the main heat exchanger 2, the auxiliary heat exchanger 3, and the exhaust stack 4. On the other hand, in the flow of water, the water coming from the water supply pipe 6 reaches the auxiliary heat exchanger 3, where the latent heat in the combustion gas burned in the burner 1 is recovered and heated in the main heat exchanger 2. , Is supplied from the hot water supply pipe 7 to a hot water supply pipe (not shown).

Condensed water generated on the surface of the auxiliary heat exchanger 3 is collected by the tray 8 and discharged to the outside of the machine through the condensed water pipe 9, the neutralization device 10 and the drain pipe 11. In condensed water, SO in combustion gas
_{^{▲ 2- 4 ▼, NO ▲ -}} 3 ▼ thereby performing the neutralization treatment at neutralizer 10 for strongly acidic ion in keeping such.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above-mentioned configuration, the residual condensed water in the neutralization device 10 reacts with the neutralizing agent to generate impurities in the state where the water heater is not used for the maximum period. Alternatively, there is a problem that the neutralization characteristics are changed due to the fact that the surface treatment agent of the auxiliary heat exchanger 3 is peeled off and mixed in the neutralization device 10.

In view of the above problems, the present invention is intended to prevent the formation of impurities in the neutralization device, remove the accumulated substances, and stabilize the neutralization characteristics.

Means for Solving the Problems In order to solve the above problems, the water heater of the present invention is a neutralizer or a condensed water pipe, and a communication pipe communicating with a valve provided in the hot water supply pipe. It is configured to be provided.

Operation According to the present invention, the water having the hot water supply pipe-valve-communication pipe flows into the neutralization device by the above-mentioned configuration, and residual condensed water,
It becomes possible to remove the accumulated substances.

As a result, generation and retention of impurities are eliminated, and stable neutralization characteristics are obtained.

Embodiment A water heater according to an embodiment of the present invention will be described below with reference to the drawings. The same parts as those in the above-mentioned conventional example are designated by the same reference numerals, detailed description thereof will be omitted, and only different parts will be described.

In FIG. 1, a valve 12 is provided in the hot water supply pipe 7, and a communication pipe 13 is connected from the valve 12 to the neutralization device 10 or the condensed water pipe 9. In this embodiment, a communication pipe 13 is connected to the upper part of the neutralizer 10.

In the water heater configured in this manner, when the water heater is not used for a long time or in the case of regular inspection, a part of the hot water is passed through the hot water supply pipe 7 to the valve 12 to the communication pipe 13 by opening the valve 12. And flows into the neutralization device 10. Due to the hot water or water that has flowed in, residual condensed water and stagnant substances in the neutralization device 10 are discharged from the drain pipe 11 to the outside of the machine. In particular, when hot water is introduced, the effect is great because the stagnant material is easily dissolved.

As described above, according to the present embodiment, it is possible to prevent the generation of impurities due to the reaction between the residual condensed water in the neutralization device 10 and the neutralizing agent, and it is also possible to easily discharge the mixed foreign matter to the outside of the machine. it can.

EFFECTS OF THE INVENTION As described above, the present invention prevents the generation of impurities in the neutralization device by providing the communication pipe in the middle of the neutralization device or the condensed water pipe through the valve provided in the hot water supply pipe. However, since the mixed foreign matter can be easily discharged, a stable neutralizing property can be obtained and the safety can be improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a water heater in one embodiment of the present invention, and FIG. 2 is a configuration diagram showing a conventional water heater. 2 ... Main heat exchanger, 3 ... Auxiliary heat exchanger, 7 ... Hot water supply pipe, 8 ... Receiving pan, 9 ... Condensing water pipe, 10 ... Neutralizing device, 11 ... Drainage pipe, 12 ... Valve , 13 ... Communication pipe.

Claims (1)

[Claims] 1. A main heat exchanger, an auxiliary heat exchanger, a tray for collecting condensed water generated in the auxiliary heat exchanger, a neutralizer for neutralizing the condensed water, the tray and a neutralizer. A water heater provided with a condensate water pipe for connecting the above, and a communication pipe communicating with a valve provided in the middle of the hot water supply pipe in the middle of the neutralization device or the condensed water pipe.