JPS5851535Y2 - water heater - Google Patents

Description

[Detailed description of the invention] The present invention makes it possible to select between a small amount of hot water supply for general use in kitchens and a large amount of hot water supply, such as pouring hot water into a bath, using a single device. The first exchanger for water heating is directly connected to the hot water outlet pipe via the hot water preheating heat exchanger inserted in the hot water storage tank, and the water stored in the hot water storage tank is circulated and heated. A second heat exchanger is provided in two combustion chambers separated from each other by a partition wall, and a heating effect on the side heat exchanger can be selected by switching a damper at a position below these surface combustion chambers. The present invention relates to a water heater that is equipped with a possible shared combustion device.

This type of hot water heater not only has the practical effect of being able to function as both a hot water storage type and an instantaneous type in one device, but also overcomes the drawbacks of conventional hot water storage types, namely, it can supply a large amount of hot water even when a small amount of hot water is being supplied. This has the effect of eliminating disadvantages such as loss of thermal energy due to having to boil hot water, lack of responsiveness to demand due to slow start-up, and large heat dissipation loss due to constant storage of hot water.

The present invention aims to further improve the hot water supply system that has the various effects described above, and by devising the flow and discharge form of high-temperature combustion gas, it is possible to achieve extremely efficient hot water supply in both small quantities and large quantities. The purpose is to make it possible to do it in a state.

The water heater according to the present invention has the above configuration, and is provided with a bypass pipe that communicates the outlet of the first heat exchanger with the inlet of the hot water preheating heat exchanger, and the surface combustion chamber is connected to the It is characterized in that a communication part is provided in the upper part to communicate with each other, and in the lower part of the surface combustion chamber, there are exhaust ports each having an on-off valve.

That is, according to the present invention, the heating effect of one combustion heating device on the first or second heat exchanger can be selected by only switching the damper, and the heating effect can be applied to an instantaneous water heater that is applied to a small quantity of hot water supply and a large quantity of hot water supply. In addition to the practical effect of being able to be used as a hot water storage water heater, it also has the effect of eliminating the drawbacks of conventional hot water storage only types.
In particular, according to the present invention, the remaining heat of the high-temperature combustion gas after the heating effect on the first or second heat exchanger is recovered by the other second or first heat exchanger. The heat of the exhaust gas during the heating action on the container can be effectively used to heat the stored water via the second heat exchanger.The effective use of the exhaust gas heat has an overall advantageous thermal economy, and it is possible to supply hot water in small quantities and in large quantities. Both types of hot water supply have the remarkable advantage of being able to be performed very efficiently.

Hereinafter, embodiments of the present invention will be described based on the drawings.

When a large-capacity water heating first heat exchanger 2 and a small-capacity second heat exchanger 3 are installed in parallel in one casing 1, the side heat exchangers 2 and 3 are connected to each other by a partition wall 4 in an up-down position. It is provided in two compartmentalized combustion chambers 5 and 6, and a plane combustion chamber 5 is provided.
, 6 and below the lower end of the partition wall 4, the side heat exchangers 2, 3
The first heat exchanger 2 is connected to a water supply pipe 10 via a hot water preheating heat exchanger 9 inserted into a hot water storage tank 8. ,
The outlet portion of the second heat exchanger 3 is directly connected to the hot water outlet pipe 11, and both end portions of the second heat exchanger 3 are connected to the hot water storage tank 8 through a branch pipe 10 from the water supply pipe 10. It is configured to circulate and heat the water stored in the chamber 8.

12 is a bypass pipe that communicates the outlet of the first heat exchanger 2 with the inlet (or outlet) of the preheating heat exchanger 9; In order to avoid this tailing phenomenon that occurs in the heat exchanger 2, and when the second heat exchanger 3 is in operation to supply a large amount of hot water, exhaust gas heat is recovered in the first heat exchanger 2, and this recovered heat is used to store the hot water in the hot water storage tank 8. It is used for heating.

At the outlet of the first heat exchanger 2 and the hot water storage tank 8, a flow control valve 13 for supplying and shutting off fuel gas to the combustion heating device 7 is provided.
It is impossible to adjust the combustion amount based on the hot water temperature detection.

A damper 14 is pivotally connected to the lower end of the partition wall 4 and can swing open and close around a horizontal axis 14a.
4, the heating action of the combustion heating device 7 on the side heat exchangers 2 and 3 can be selectively selected.

A communication portion 15 is formed between the upper end of the partition wall 4 and the upper wall of the casing 1 to communicate the surface combustion chambers 5 and 6 with each other. Near the lower end of the exhaust port 18.
Reference numeral 19 is a plate-shaped opening/closing valve 20.21 pivotally connected to the casing 1 so as to be swingable around a horizontal axis, so that the opening/closing valve 19 can be opened and closed.

In the hot water supply device having the above configuration, in order to supply a small amount of hot water (or a large amount of hot water), at the same time the damper 14 is switched so that the first heat exchanger 2 (or the second heat exchanger 3) is heated by the heating device 7, Open one of the on-off valves 21 (or 20).

If hot water supply is performed in this state, the high temperature combustion gas after heating the first heat exchanger 2 (or second heat exchanger 3) will be transferred to the partition wall 4.
Through the communication part 15 at the upper end, the gas flows from the left combustion chamber 5 (or right combustion chamber 6) to the right combustion chamber 6 (or left combustion chamber 5), where the gas gives the residual heat held by the second heat exchanger 3 (or the first heat exchanger 2), and then the right exhaust port 19 (or the left exhaust port 18)
through which it is discharged to the outside.

[Brief explanation of the drawing]

The drawing is an overall schematic diagram illustrating an embodiment of the water heater according to the present invention. 2...First heat exchanger, 3...Second heat exchanger, 5゜6...Combustion chamber, 7...Combustion heating device, 8 ... Hot water storage tank, 11 ... Hot water outlet pipe, 12 ... Bypass pipe, 14 ...
Damper, 15...Communication section, 20.21...
...Opening/closing valve.

Claims (1)

[Scope of utility model registration request] a first heat exchanger 2 for heating water directly connected to a hot water outlet pipe 11 via a heat exchanger 9 for preheating hot water inserted in a hot water storage tank 8;
A second heat exchanger 3 for circulating and heating the water stored in the hot water storage tank 8 is provided in two combustion chambers 5 and 6 that are partitioned from each other by a partition wall 4. 5
. A bypass pipe 12 communicating with the inlet of the hot water preheating heat exchanger 9 is provided, and 1. The surface combustion chamber 5.6
A communication part 15 is provided at the upper part of the combustion chambers 5 and 6 to communicate with each other, and each of the lower parts of the flat combustion chambers 5 and 6 is provided with an exhaust port 18, 19 having an on-off valve 20, 21. Water heater.