JPS58106359A - Water heater - Google Patents

Abstract

PURPOSE:To enable to heat a small quantity of water, by a method wherein a plurality of thermistors by which the quantity of water being heated is detected at a plurality of levels are provided in a shell body, and the operation of a forced cnvection device is controlled in accordance with outputs from the thermistors, in a heater wherein a heat exchanger incorporating a burner is provided at an upper part of a shell body. CONSTITUTION:When a required hot water quantity is set at ''1/2'' and hot water temperature is set at ''HIGH'', closing an operating switch 16 results in that a comparator 17 fed with a signal from the thermistor 13 provided in proximity to the heat exchanger 2 generates an output to pass an electric current to a relay 18, and combustion at the burner 3 is started by closing a contact of the relay 18. When water at an upper part of the heat exchanger 2 is heated to a set temperature, a comparator 24 generates an output to excite a relay 22, and a circulating pump 10 provided as a forced convection device is driven. Then, water and hot water in the shell body 1 are circulated through connecting pipes 11, 12, and water in the shell body 1 is heated, starting from an upper part thereof. When the hot water quantity reaches ''1/2'', the pump 10 and the burner 3 are sequentially stopped in accordance with a signal from the thermistor 14.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a heat exchange system in which a hot water supply port is provided in the upper part of the can body, and a water supply port is provided in the lower part of the can body, and a heat exchanger is installed in the upper part of the can body to exchange heat of water in the can body using combustion heat of a burner. This relates to a hot water boiler equipped with a boiler.

As shown in FIG. 4, a conventional hot water boiler has a combustion chamber 32 inside a can body 31, and has a combustion chamber 32 between the upper part of the can body 31 and the can body 3.
1 through a forced convection device 33 such as a circulation pump, and when a small amount of hot water is supplied, the forced convection device 33
By turning 1-OFFJ, only the water located in the upper part of the combustion chamber 32 is boiled, so that hot water can be supplied with a small lid, and when a large amount of hot water is supplied, the forced convection device 3 is
3 is turned ON, all the water in one can body 31 is heated, so that a large amount of hot water can be supplied.

However, in the conventional hot water boiler mentioned above.

The amount of hot water supplied can only be classified into large amounts and small amounts, and the amount of hot water cannot be changed depending on the season.As a result, the bath 34 has the disadvantage of wasteful combustion, and the forced convection device 33 cannot be stopped manually. If you do not turn it off after pumping up the S, the forced convection device 33 will be operated again after hot water is used and will heat all the water in the can body 31. As a result, it also had the disadvantage of not being able to heat a small amount.◇ In view of the above-mentioned disadvantages of the conventional technology, the present invention makes it possible to vary the amount of hot water supply depending on the season, and also automatically controls the operation of the forced convection device. The basic structure of the tank to achieve this purpose is to use multiple thermistors that detect the amount of heated water in one can in multiple stages in the height direction of the can. This thermistor is used to control the operation of a forced convection device such as a circulation pump. With this configuration, the required amount of heated water can be obtained in multiple stages depending on the season, and the user can simply set the required amount of heated water when using hot water supply, and the set When the hot water is heated to a certain amount, a thermistor corresponding to the amount of hot water detects it and controls the operation of the forced convection device. Its operability is simple and malfunction-free can be obtained.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 3. 1 is a can body, and 2 is a heat exchanger located at the top of the can body 1 so as to penetrate both ends of the can body 1. One end of this heat exchanger 2 is an open end, and a bar force 3 is applied thereto. The other end is partially opened, and a chimney 4 and a chimney top 6 for discharging combustion waste gas from the burner 3 are connected to the opening. In addition, a baffle plate (not shown) is provided in the heat exchanger 2 to heat the water in the can body 1 by transferring the combustion heat from the gas combustion of the burner 3 from the outer periphery of the heat exchanger 2. do. Reference numeral 6 denotes a heat exchanger provided at the lower part of the can body 1, and this heat exchanger 6 circulates a heat medium heated by a heat collector (not shown) that collects solar heat by a circulation pump 7. This heats the water inside the can body 1. 8 is a hot water supply port provided at the top of the can body 1, and 9 is a water supply row provided at the bottom of the can body 1. 1o is a forced convection device (hereinafter referred to as a circulation pump) such as a circulation pump, and this circulation pump 1o circulates water between the upper and lower parts of the can.

13 is a first thermistor located near the heat exchanger 2 and attached to the can body 1; 14 is a second thermistor located in the center part 6 of the can body 1; Although one thermistor 14 in No. 2 is provided in the embodiment, it is also possible to provide a plurality of thermistors 14. Reference numeral 16 denotes a third thermistor that is attached to the can body 1 and located near the connecting pipe 11 that connects the can body 1 and the circulation pump 10 to the can body 1. Circulation pump 10 is l'-0N
When circulating the water in the can body 1 in the J state, a large amount of water is supplied when the water temperature in the can body 1 is "low", and a small amount when the water temperature in the can body 1 is "high". Circulation pump 1 to circulate water
This is to adjust the circulation flow rate of 0. In this case, instead of adjusting the circulation flow rate, the circulation pump 10 is
It's okay to have FFJ.

Next, the present invention will be explained in detail based on FIGS. 2 and 3. Now, assuming that the required amount of hot water is Ill and the hot water temperature is ``high,'' set the hot water temperature to ``high'' and the hot water amount to ``bar'' on the operating section (not shown). In this state, turn on the operation switch 16.
”, when the water temperature in the first can body 1 is lower than the set temperature “high”, the first comparator 17 becomes conductive, and the first
The relay 6 " 1B is energized. As a result of this energization, the first relay 18
The contact 19 is not turned ON, and the combustion control circuit 20 is activated and the burner 3 starts combustion. With the start of this combustion, the water in the can body 1 is heated via the heat exchanger 2. Since the heated hot water near the heat exchanger 2 has a lower specific gravity, convection occurs above the heat exchanger 2, and the heat exchanger 2
The hot water at the top will heat up. On the other hand, below the heat exchanger 2, only the vicinity of the heat exchanger 2 is heated, and the heated water has a lower specific gravity and cannot rise, so it mixes with the water below the heat exchanger 2. Never. Under the above conditions, the water at the top of heat exchanger 2 is heated and the initial set temperature is "high".
When this happens, the second comparator 18 becomes conductive due to a change in the resistance value of the first thermistor 13, and the second relay 22 is energized.

This energization turns on the contact 23 of the second relay 22, and the circulation pump 10 is energized. As a result, the water in one can body 1 circulates via the connecting pipes 11,12. The water in the can body 1 is transferred to the water in the lower part of the can body 1 which has been circulated to the upper part of the heat exchanger 2 by the circulation pump 1o at the same time as the water in the upper part of the heat exchanger 2 is pushed down to the bottom of the heat exchanger 2. is heated through the heat exchanger 2. In this way, the third comparator 24 becomes non-conducting due to a gradual change in the resistance value of the can body mister 614, and the second relay 22 becomes non-energized via the combustion control circuit 20, and its contact 23 is turned off, and the circulation pump 10 is stopped. After that, the burner 3 heats the water in the can body 1 until the first thermistor 13 reaches the set temperature "high resistance value," and when the resistance value reaches the set temperature,
The first comparator 17 becomes non-conducting, the first relay 18 becomes non-energized, and its contact 19 is turned off, thereby stopping the operation of the burner 3. Through the above operations, the required amount and temperature of hot water can be obtained. In addition, if the required amount of hot water is small, by setting the required amount of hot water to "small", the third comparator 24 is always in a non-conducting state, so the second relay 22 is OFF and the circulation pump 1o is turned off.
Only the water that is stopped will be heated. If the required amount of hot water is large, if the required amount of hot water is set to "large", the third comparator 24 is always in a conductive state, so the second
The relay 22 is energized and its contact 23 is turned ON, and the circulation pump 1o is operated.As a result, the water in the can body 1 is heated from the top, and the water in the can body 1 is heated from the top. When all of Since the contact point 19 is turned OFF, the operation of the burner 3 is stopped, and the combustion control circuit 2o of the circulation pump 1° is also deactivated.

The power to the second relay 22 is cut off, and its contacts 23
is turned OFF, so operation is stopped.

In addition, in the above embodiment, the hot water amount switching is set to "Small JrL".
Jr. large" and one second thermistor 14 is provided. However, a plurality of second thermistors 14 may be provided in the height direction of the can body 1. In this case, the amount of hot water can be divided into small sections, and as a result, the amount of heated hot water required can be obtained in multiple stages depending on the season. Further, the sequence in this case also operates almost the same as that described above.

As described above, in the hot water boiler of the present invention, the amount of heated water inside the can is distributed over multiple stages in the height direction of the can, which is equipped with a heat exchanger in the upper part that exchanges heat of the water inside the can using the combustion heat of the burner. Since multiple thermistors are installed for detection, and these thermistors are used to control the operation of forced convection devices such as circulation pumps, the required amount of heated water can be obtained in multiple stages depending on the season. In addition, the user only needs to preset the amount of heated water required for hot water supply, and when the hot water reaches the set amount, the thermistor corresponding to that amount detects it and starts operating the forced convection device. Compared to the conventional method in which the operation of the forced convection device is manually controlled, the operability is simpler and malfunctions can be eliminated.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a hot water boiler showing an embodiment of the present invention, FIGS. 2 and 3 are circuit diagrams of the same hot water boiler, and FIG.
The figure is a schematic diagram of a conventional hot water boiler. 1... Can body, 2... Heat exchanger, 3...
...Burner, 8...Hot water inlet, 9...
・Water supply port, 10-... Forced convection device, 11.12
...Connecting pipe, 14...Thermistor. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3

Claims (1)

[Claims] A hot water inlet is provided in the upper part and a water inlet is provided in the lower part, and the upper part and the lower part are connected via a forced convection device such as a circulation pump and a connecting pipe, and a a heat exchanger for exchanging heat of water in the can by combustion heat, and a plurality of thermistors for detecting the amount of heated water in one can in multiple stages in the height direction of the can, and the thermistor A hot water boiler configured to control the operation of a forced convection device such as the circulation pump.