JPS6115975B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hot water heater, and its objects are as follows: (1) A water heater and a space heater are combined into one, and further compacted by forced combustion using a combustion blower. We aim to

(2) Save energy by forcibly controlling combustion air with a combustion blower.

Conventional hot water heaters did not use forced combustion, but instead were natural combustion (balanced type) systems. This system required a large air supply and exhaust top, and was therefore very complicated to construct. Also, since it was a natural combustion type, it was necessary to increase the height of the exhaust section to obtain a draft effect.

The present invention aims to eliminate the above-mentioned drawbacks, facilitate construction work, and make the equipment more compact.

First, the configuration of the present invention will be described.

1 is the main body exterior, 2 is the hot water supply side heat exchanger, 3 is the water supply inlet, 4 is the hot water supply outlet, 5 is the heating side heat exchanger, 6 is the heating water return port, 7 is the heating water supply port, 8 is for heating water circulation 9 is a gas inlet, 10 is a main solenoid valve, 11 is a gas governor, and 12 and 13 are heating side solenoid valves that switch the strength of the gas amount on the heating side. That is 13
Squeeze the outlet of the solenoid valve 12 and close the solenoid valve 13.
Make it weak when it is open. 14 is a main burner on the heating side, 15 is a pilot burner on the heating side, and 16 is an igniter for igniting the pilot burner on the heating side. Reference numeral 17 denotes a pilot solenoid valve on the hot water supply side, which is opened and closed by a water pressure responsive valve 18. Reference numeral 19 denotes a pilot burner on the hot water supply side, and when the solenoid valve 17 is opened by the transfer plate 20, the flame transfers from the pilot burner 15 on the heating side.

Numerals 21 and 22 are electromagnetic valves on the hot water supply side for switching the strength of the gas amount on the hot water supply side. 23 is the hot water supply side main burner, 2
4 is a resistor provided in the heating side exhaust section, and 25 is a resistor provided in the hot water supply side exhaust section, each of which is set so that the excess air ratio during combustion will be approximately the same depending on the input. Further, the shape of the resistor is generally as shown in FIGS. 2A and 2B, but as a method of achieving even higher thermal efficiency, there is a method in which the pressure balance is made uniform as shown in FIGS. 3A and 3B. 26 is a combined exhaust section, and 27 is a combustion blower provided in the combined exhaust section 26.
28 is an exhaust top 29 is a combustion air intake port.

Next, I will talk about the effect.

(a) During heating operation The combustion blower 27 rotates and the pilot burner 15 is ignited by the igniter 16, then the pump 8 rotates and at the same time the solenoid valves 12 and 13 are opened to cause combustion in the main burner 14 and heat exchanger. The hot water heat-exchanged in step 5 is sent to a radiator (not shown) by a pump 8. The exhaust volume is restricted by the resistor 24, and excessive air is not supplied to combustion, resulting in high thermal efficiency. Furthermore, when the heating load is small, the blower 27 is made to rotate at a low speed, and at the same time the electromagnetic valve 12 is closed to throttle the amount of gas, thereby making it possible to obtain a high thermal efficiency by making the excess air ratio to the same level as in the case of strong combustion.

(b) When using hot water supply: First, the pilot burner 15 on the heating side is ignited, and the electromagnetic 17 is opened by the action of the hydraulic valve 18, and the pilot burner 19 is ignited via the fire transfer plate 20. After a slight delay, the solenoid valves 21 and 22 are opened, and the main burner 23 is ignited to supply hot water.

(c) When hot water supply and heating are used at the same time This is a case where (a) and (b) above work at the same time, and simultaneous use is also possible.

As described above, according to the present invention, the following effects can be obtained.

(1) A single combustion blower can perform both heating and hot water supply, making it extremely cheap and compact.

(2) Since the combustion air is throttled with a resistor, high thermal efficiency can be achieved, which helps save energy.

(3) Due to forced combustion, there is little influence from outside wind, etc., making it highly safe.

(4) Construction is very easy as it is a forced combustion type with air supply and exhaust in one place.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a hot water heater according to an embodiment of the present invention, Fig. 2 A and B are a plan view and a sectional view of the same resistor, and Fig. 3 A and B are other embodiments of the same resistor. FIG. 2 is a plan view and a sectional view. 2... Hot water supply side heat exchanger, 5... Heating side heat exchanger, 10... Main solenoid valve, 11... Gas governor, 12, 13... Heating side solenoid valve.

Claims (1)

[Claims] 1 In a 2-can, 2-water type hot water heater, a resistor is provided in the exhaust section of the hot water supply side heat exchanger and the heating side heat exchanger in accordance with each input, and the resistor is aligned with one exhaust section behind the resistor. A hot water heater characterized in that a combustion blower is provided in the combined exhaust section.