JPS608649A - Complex hot-water supply device - Google Patents

Abstract

PURPOSE:To improve the accuracy and responce ability, and prevent the wrong operation caused by scale and the like by the direct detecting of a water level in a bathtub. CONSTITUTION:A floating element 30 made of a magnetic material 30a coated by a resin is internally installed on an inner wall part 28a of a water supply pipe 28. A magnet 29a and a detector 29 (a detecting part A consists of 29 and 29a) for detecting the variation of magnetic field are arranged on the outer wall of the water supply pipe 28 with spacing the uniform interval L, also the magnet 29a and the detector 29 are formed to be mounted with respective positioning relationship at the optional location in the height direction H on the outer wall. The floating element 30 is quite free from the effect of iron included in a hot-water (water), accordingly, the changing force of magnetic field for the detecting part A is stabilized. Further, by the cleaning effect at every hot-water supply operation for the floating element 30 and the inner wall part 28a, a blocking or a wrong detecting action caused by a foreign matter and the like can be prevented completely.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a composite water heater that automatically supplies hot water using gas, oil, electricity, or the like as a heat source.

Conventional configuration and its problems Conventional detection systems for automatic hot water supply of this type are shown in Figures 1 and 2.
It is configured as shown in the figure.

A forced water flow type heat exchanger 2 (hereinafter referred to as heat exchanger A) and a natural circulation type heat exchanger 3 (hereinafter referred to as heat exchanger B) are provided in the appliance body 1, and the heat exchanger B is passed through the circulation pipe 4. In addition to being connected to the bathtub 9, the hot water outlet 12 of the heat exchanger A is branched within the appliance body 1, and one of the hot water outlets 12a faces the water pouring pipe 6 provided in the heat exchanger B. A drive valve 7 for regulating the amount of hot water is provided in the circuit of the hot water outlet 12a.
has been established. A water connection pipe 18 is installed at the bottom of the water cooling wall 13 of the heat exchanger B.
A water pressure detector 8 is attached via the. A diaphragm valve 14 , a pressure equalizing spring 16 , an interlocking rod 16 , and a microswitch 17 are incorporated into the water pressure detector 8 , and an output signal is transmitted to the control unit 10 . 11° 11a is a heating section of heat exchangers A and B. Reference numeral 19 denotes a hot water stop valve provided outside the appliance main body 1.

Here, a case in which molten metal is poured from heat exchanger A to heat exchanger B will be described as an example. The hot water supplied from the heat exchanger A is poured into the heat exchanger B from the water pouring pipe 5 through the outlet 12a by the actuation of the drive valve 7.
It is stored in the bathtub 9. As time passes, the water level in the bathtub 9 rises, and the diaphragm-type water pressure detector 8 installed in the heat exchanger B operates, and an output signal is transmitted to the control unit 1o, which activates the drive valve 7.
is closed and the heating section 11 is stopped. At this time, the water pressure detector 8 operates as follows. When the water level in the bathtub 9 rises, the amount of pressure received by the diaphragm valve 14 increases and the balance with the pressure equalizing spring 15 is lost, driving the interlocking rod 16 and operating the micro switch 17. This detection method detects the water level as pressure and converts it into mechanical motion, so the detection accuracy and response are poor.
I'm good enough to check if there's water inside. In addition, since the diaphragm 14 is always exposed to hot water, it can be hardened by heat and easily break, causing many problems in terms of durability.

The type of bathtub 9 (depth, dimensions,
In many cases, the set water level is arbitrarily selected by the user depending on the water level (capacity), and the water level that can be detected by the detection means is fixed depending on the design conditions of the diaphragm valve 14 and the pressure equalization spring 15.
There is a problem in that it cannot support arbitrary setting of water level at all.

Further, a water pressure detector 8 is fixed to the lower part of the water cooling chamber 13.Object of the InventionThe present invention is intended to eliminate such conventional drawbacks, and is to directly measure the bath water level as a means for automatic hot water supply in a composite water heater. The purpose of this system is to improve accuracy and responsiveness, prevent malfunctions caused by hot water scale, and allow the user to arbitrarily select the water level setting in the bathtub.

Structure of the Invention In order to achieve this object, the present invention provides a float having a water supply pipe formed in the water pipe of one of the natural circulation heat exchangers (hereinafter referred to as heat exchanger B), and the inside of which is coated with magnetic material with resin or the like. A magnet and a detector for detecting changes in the magnetic field are installed at a certain interval on the outer wall of the water supply pipe, so that it can be mounted at any position on the outer wall without changing the position conditions. This configuration includes a filter section.

With this configuration, the hot water poured into the heat exchanger B from the water supply pipe is stored in the bathtub through the water pipe while constantly cleaning the float and the inner wall of the water supply pipe.

As time passes, the water level in the bathtub increases, and the float also floats up into the water supply pipe at the same level as the bathtub water level. The floating float changes the magnetic field generated between the magnet attached to the outer wall of the water supply pipe and the detector (the magnet and the detector are hereinafter referred to as the detection section), and the float's magnetic material causes the detector to be detected. to obtain a signal to stop the pouring operation.

At this time, the position of the float is always the same as the water level in the bathtub, and direct detection is performed, so the water level detection is extremely accurate and the response is faster than that of conventional methods. The configuration allows for easy installation of the water level.

Furthermore, since the float is a magnetic material, it does not attract iron in the hot water (water), so there is no adverse effect on the detection section, and at the same time, the injected hot water always keeps it in a clean state, so that no detection errors occur at all. Furthermore, the filter part removes foreign matter to ensure reliable detection.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 3 to 6. In FIG. 3, there is a forced water flow type heat exchanger 22 (hereinafter referred to as heat exchanger A) and a natural circulation type heat exchanger 2 in the appliance body 25.
1 (hereinafter referred to as heat exchanger B) is connected to the bathtub 34 via the water pipe 35 of the heat exchanger B, and the outlet 23 of the heat exchanger A is branched within the appliance body 25, and one outlet 23a is connected to the bathtub 34 through the water pipe 35 of the heat exchanger B. It faces the water supply pipe 28 provided at intersection B. The other outlet 24 has a water stop portion 24 provided outside the appliance body 25.

A drive unit 27 for regulating the amount of hot water is provided in the circuit of the tap water outlet 24a. The water supply pipe 28 of the heat exchanger B is formed to have a constant height in the vertical direction within the appliance body 26.

A filter section 31 is provided at the connection between the water supply pipe 28 and the water pipe line 35.
At the same time, the inner wall 28a of the water supply pipe 28 - is the fourth
As shown in the figure, a float 30 made of a magnetic material 30a coated with resin is installed inside, and a magnet 7) is installed on the outer wall of the water supply pipe 28.
29a and a magnetic field change detector 29 (29 and 29a are referred to as a detection part A) are arranged at regular intervals, and are configured so that they can be mounted at any position in the height direction H of the outer wall while maintaining their positional relationship. ing. The attachment means is to use screws or fixing pliers. The output of the detection section A is configured to be transmitted to the control section 33. 20° 32 is the heating part of heat exchanger A and B, 26 is an exhaust unit, 35 is a fuel supply port, and 36 is a gear rally for air supply. This is an example in which a pump 37 for forced circulation is provided, and the other configurations are exactly the same.

When pouring hot water from heat exchange A to heat exchange B, hot water from heat exchange A is supplied to heating section 2 after controlling the fuel supplied through fuel supply port 35 by control section 33 according to the pouring amount and set temperature.
It is obtained by combustion and heat generation by o. In that case, 26 exhaust units 1. The engine also operates at the same time to guide combustion air from the air supply gear rally 36.

The hot water obtained by the heat exchanger A is transferred to the drive unit 27, - the hot water outlet 23
The hot water is poured into the heat exchanger B from the water supply pipe 28 through the bathtub 34
stored inside. At this time, the inner wall 28a of the water supply pipe 28 and the float 30 are always cleaned with fresh hot water.

As time passes, the water level in the bathtub 34 rises, and at the same time, the water level in the water supply pipe 28 changes as well, causing the float 30 to rise to the surface of the water and stir. When the float 3o reaches the position toward the detection part, a magnetic field change is applied to the detection part A by the magnetic body 30a,
It detects that the water level is at the set value, transmits the output to the control section 33, closes the drive section 27, and closes the heating section 2.
Stop the fuel supply to 0. In this case, the water level of the bathtub 34 is at the position of the float 3o, and the detection part A is mounted to ensure direct detection at the position, so that the water level detection has high accuracy and quick response. Moreover, since the detection part A obtains the same effect no matter where it is fixed in the height direction H of the water supply pipe 28 due to its structure, the water level can be set arbitrarily depending on the type of bathtub 34.
Dimensional troubles during the installation work of the bathtub 34 can also be fully absorbed after the work is completed. Since the magnetic body 30a of the float 30 is coated with resin, there is no influence of iron in the hot water (water), and the magnetic field changing force on the detection part A is stabilized. or,
Since the float 30 and the inner wall portion 28a are subjected to a cleaning action each time the melt is poured, there will be no detection error at all if the float is clogged with foreign matter or the like. In terms of configuration, the water supply pipe 28 is part of the detection configuration, which is advantageous in terms of cost.

Since the presence or absence of hot water in the bathtub 34 can also be detected during the heating action of the heat exchanger B, dry heating can be reliably prevented and a safety effect can also be obtained.

The embodiment shown in FIG. 6 also has the same effect as the embodiment shown in FIG. 3.

Effects of the Invention Since changes in the magnetic field are directly detected using a float with a built-in magnetic material, reliability is high and water level detection accuracy is high.

Even if you change the detection position arbitrarily, the accuracy does not change at all, and there is a large degree of freedom in setting the water level by automatic water filling of the bathtub, which increases the product value as a composite water heater.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a conventional combined water heater, Fig. 2 is a block diagram of a conventional detection means, Fig. 3 is a block diagram of a combined water heater which is an embodiment of the present invention, and Fig. 4 is a block diagram of the same detection means. . FIG. 6, a sectional view of the pouring part, is a configuration diagram showing another embodiment of the present invention. 20.32...Heating section, 21...Natural circulation heat exchanger, 22...Forced water flow type heat exchanger,
2A ・Drive unit, 28... Water supply pipe, 28a...
・Inner wall part, 29...Detector, 29a...
- Magnet, 3o - Float, 30a... Magnetic material, 33... Control unit, 36... Water pipe. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure 4

Claims (1)

[Claims] The appliance body is equipped with a forced water flow type heat exchanger and another natural or forced circulation type heat exchanger, and the hot water outlet side of the forced water flow type heat exchanger is divided within the appliance body, and one side is passed through a water injection pipe. Water is injected into the water pipe of the other natural or forced circulation heat exchanger, and a water supply pipe as a water receiving means is formed in the water pipe of the other natural or forced circulation heat exchanger. A means for mounting a magnetic force generator and a detector at arbitrary positions at a certain distance from each other is provided on the outer wall side, and a magnetic float is provided in the water supply pipe to control the heating amount and water injection amount of the forced water heat exchanger. A combined water heater configured as a control and detection device for the water level in said other natural or forced circulation heat exchanger.