JPS5974449A - Heating apparatus for electric bath furnace - Google Patents

Abstract

PURPOSE:To eliminate waste of time and expense required for heating cooled water in a bathtub to a proper temperature and to provide an electric bath furnace which is safe to handle and has a high thermal efficiency, by connecting an induction heating means and a control means for controlling the induction heating means via an insulating transformer, and providing the control means and the insulating transformer in addition to a heating section including the induction heating means. CONSTITUTION:An induction heating means 15 fixed to an outer plate 7 by means of a hinge or the like consists of a bobbin 16 made of an electrically insulating material surrounding a heating pipe 11, a heating coil 17 wound around the bobbin 16, and a plurality of closed magnetic circuit constituting members 18, 18 made of a ferromagnetic material such as ferrite having a high resistivity and fixed to the bobbin 16 near the outer peripheral portion of the heating coil 17. Further, an insulating transformer 26 and a control means 25 for controlling current supply to the heating coil 17 of the induction heating means 15 are fixed to a chassis 24.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heating control device for an electric bath pot that heats water or hot water stored in a bathtub. In recent years, if a gas-related accident such as a gas explosion or gas leak occurs in apartment complexes, etc., there is a risk of suffering a large amount of human injury and damage, so in apartment complexes, only electricity is supplied to each unit without gas. So-called all-electrification is becoming popular due to its benefits of electrical safety.

Most of the methods for supplying hot water to bathtubs in apartment buildings and the like with all-electricity are the so-called storage hot water supply method, in which the hot water is heated with an electric water heater and stored into the bathtub through a hot water pipe.

In bathtubs with hot water storage and hot water supply system, hot water is poured into the bathtub from the faucet, so unlike traditional gas bathtubs, it is not possible to reheat the bathtub, and it is difficult to heat up the hot water in the bathtub. Either add hot water from an electric water heater, or drain some or all of the lukewarm water in the bathtub and then add a moderate amount of hot water by mixing hot water from the electric water heater and tap water. The user has to fill the bathtub with water, which is troublesome and uneconomical.

As an example of an electric device that solves these problems, that is, raises the temperature of lukewarm water in a bathtub, there is an electric bath pot using a resistance heating method as shown in FIG. To explain its structure, inside the main body 41, both ends are connected water pipes 42,
A sheathed heater 45 is fixed by brazing or the like to the approximately central outer circumference of a heating pipe 44 formed in a substantially U-shape that is connected to the bathtub 3 via a pipe 42. A control component 46 that controls energization to the sheathed heater 45 is provided.

In order to raise the temperature of the water in the bathtub 43 in this electric bath pot, current is passed through the resistance heating element 45a of the heater 46 via a control component 46 connected to a power source (not shown). This is carried out by transmitting the generated heat to the water or hot water in the heating pipe 44 through the heating pipe 44. Magnesium 7ium oxide, an insulator4
．． 5 b has deteriorated for some reason, or if the
The metal pipe 45C which is the outer cover of the heater is torn due to food etc. and has a hole in it, and the heating pipe 44 is also torn due to corrosion etc. and has a hole, causing water leakage. Water enters into the magnesium oxide 45b of the heater 45, the function of the magnesium oxide 46b as an insulator deteriorates, and the current flowing to the resistance heating element 45a leaks and flows to the heating pipe 44, and this leakage current causes There is a risk of an accident occurring if a person taking a bath receives an electric shock.

Furthermore, if a hole is made in the heating pipe 44 and water leaks, this water d falls and enters the control part 46, causing a short circuit between live parts of the control part 46 and damaging the control part 46.
There is a risk that the equipment will stop functioning and be destroyed.

On the other hand, from the perspective of preventing electric shock accidents, the sheathed heater 45
It is possible to prevent leakage current due to insulation deterioration from flowing through the heating pipe 44, and one way to do this is to interpose an insulator between the heating pipe 44 and the metal pipe 450 of the sheathed heater 45. However, as is well known, the insulator is a poor thermal conductor, so the utilization rate of the heat generated by the resistance heating element 45a decreases, and if insulation deterioration of the insulator and sheathed heater 45 occurs, an electric shock may occur as described above. There is a risk of this occurring.

As mentioned above, the conventional resistance heating type electric bathtub has drawbacks in terms of thermal efficiency and safety.

Purpose of the Invention The present invention provides +MI ;'Is for hot water storage hot water supply type bathtubs.
Part 1: Rinse the cooled water in the bathtub until it reaches the appropriate temperature.
- Eliminate the hassle, uneconomical, and inconvenience caused by
At the same time, 1-I is added to the conventional resistance heating electric bath pot.
The aim is to provide an electric bath pot that is extremely safe and has good thermal efficiency.

Structure of the Invention The present invention connects an induction heating means and a control part for controlling the same through an insulation transformer, and also arranges the control part and the insulation transformer outside the heating part having the induction heating means. be.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In Fig. 1, 1 is a heating part, 2 is a main body, and electrical connection is made with a connecting cable 3, and heating part 1 is connected to a bathroom 4.
The main body 2 is connected to a bathtub 5 installed inside the bathroom, while the main body 2 is attached to a wall 6 outside the bathroom 4.

To explain the structure of the heating section 1, in Fig. 2, 6 and 7 are outer plates formed by bending sheet metal, etc., the upper opening is the upper plate 8, the lower opening is the bottom plate 9, and the center opening is the cover plate 10. Each is closed.

Reference numeral 11 denotes a heating pipe made of a material with good electromagnetic induction heating effect, and both ends are bent connecting members 12 made of a flexible material.
12 and further connected to the bathtub 5 via an inflow pipe 13 and an outflow pipe 14 fixed to the outer panel 7, respectively.

15 is an induction heating means fixed to the outer plate 7 by screwing or the like, and includes a bobbin 16 made of an electrically insulating material surrounding the heating pipe 11, and a heating coil 17 wound around the bobbin 16.
A plurality of closed magnetic members 18.18 for forming a magnetic path made of a ferromagnetic material with high resistivity such as ferrite are attached to the bobbin 16 near the outer periphery of the heating coil 17. It is.

Furthermore, reference numerals 19, 19.20, 20, 21, and 21 are fixing fittings, a first clamping bucking, and a second clamping banking that clamp and fix the inflow pipe 13 and the outflow pipe 14 that are attached to the bathtub 5.

Next, the configuration of the main body 2 will be explained.

In FIG. 3, reference numeral 22 denotes a receiving plate, which is fixed to the wall surface 6 by screws or the like, and a yaw 724 is connected to the receiving plate 22 via U1 slides 23 and 23.

/A heating coil 17 of the induction heating means 16 is placed on the yarn 24.
Control components 26 and 0.0 for controlling energization. isolation transformer 2
6 is installed.

27 is a cover made of resin or the like (attached to the I plate 22, and on the outside of this cover 27, a control panel 28 and an energization switch 29 for adjusting the amount of electricity applied to the heating coil 17 are facing. ..

The above insulation transformer 26 has a light A, (7"=E-shaped cores 30, 30, and an electrical insulation value (A"=).
a transformer bobbin 31, a primary winding 32 wound around the transformer bobbin 31, a secondary winding 33 having a number of turns approximately equal to the number of turns of the secondary winding 32, and a first winding that clamps and fixes the cores 30, 30. The holder 11 is composed of a stand 34 and a second holder 35.

-The secondary winding 32 and the secondary winding 33 are electrically insulated from each other by the partition wall 31a of the transformer bobbin 31. The secondary windings 33 are respectively connected to the heating coils 17 of the induction heating means 15 via the connecting cables 3 .

With the configuration shown in ``-'', the electric circuit is connected as shown in the fourth section. In the circuit, reference numeral 36 is a slide volume for setting the amount of current applied to the heating coil 17, and the aforementioned control knob 28 is attached to this slide volume.

The system is constructed as described above, and its operation will be explained next.

When the energization switch 29 is turned on, a voltage approximately equal to that of the primary winding 32 is induced in the secondary winding 33 of the isolation transformer 26 connected to the high-frequency oscillator built into the control component 25.
A high-frequency current flows through the heating coil 17 to generate magnetic flux, and this magnetic flux flows through the heating pipe 11 and the closed magnetic members 18 and 18 as a magnetic path. Hysteresis loss occurs and heat is generated. Since the heating pipe 11 is filled with water or hot water from the bathtub S, the water or hot water in contact with the heating pipe 11 is warm and conducts the heat of the heating pipe 11.
Take it away and immediately eat it for 4 minutes. Since the heated water or hot water has a lower specific gravity, it moves to both sides of the heating pipe 11 and flows out into the bathtub 5 through the bending connection member 12 and the outflow pipe 14, and instead, the low temperature A cycle in which water or hot water flows from the bathtub 5 into the heating pipe 11 through the inflow pipe 13 and the bent connecting member 12 and is heated is repeated.
By efficiently exchanging heat, the temperature of the cold water in the bathtub 5 is gradually raised.

The closed magnetic part 18.18 through which the magnetic flux of the heating coil 17 passes is made of a ferromagnetic material with high resistivity, such as ferrite, as described above, so it hardly generates heat and closes the magnetic path. To prevent heat generation in metal parts such as the outer panel 7 and to increase efficiency of equipment.

Next, safety will be explained.

Now, a part of the inflow pipe 14 or the heating pipe 11,
If a hole is formed due to corrosion or the like and water leaks, the leaked water will drip 10 onto the inner surface of the lower part of the heating section 1, but since the control component 25 is located inside the main body 2 outside the heating section 1, The leaked water does not reach the control part 25, and therefore there is no risk of damage caused by a short circuit between the live parts of the control part 25 due to the leaked water, so it is safe.

Furthermore, since the heating coil 17 is connected to the high frequency generator of the control component 25 via the insulation transformer 26, the insulation of the heating coil 17 and the bobbin 16 may deteriorate due to some reason, and the inflow pipe 14 or Even if the heating pipe 11 has a hole due to corrosion or the like and water leaks, and this leaked water short-circuits between the heating coil 17 and the metal parts connected to the bathtub 5 such as the heating pipe 11, the heating coil 17 is insulated. Since the transformer 26 electrically insulates the primary winding 32 side, that is, the control component 25 connected to the power supply, there is no accident such as electrocution of a person taking a bath, and safety is extremely high.

Effects of the Invention As is clear from the above explanation, according to the present invention, since the induction heating means for heating and raising the temperature of the hot water in the bathtub is provided, it is possible to cool down the cool sun in the bathtub. This eliminates the hassle and uneconomical problems associated with raising the temperature of cooled water in hot water storage type hot water supply bathtubs.In addition, since induction heating means are used, the water can be drained or hot water easily. Heat exchange efficiency is high because the heat is heated by induction heat generation in the pipe white, and it is safe because the heating coil and heating pipe can be kept in a non-contact state.

Furthermore, the induction heating means is through an insulation transformer! 7 and connect to the control parts, and the insulating torsion and control parts are installed in the hot part 11 where there is a possibility of water leakage. Even if it does, it is extremely safe with no risk of electric shock, etc.) - Don't do it, its industrial value is worth it.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the mounting state of an electric bath heating device according to an embodiment of the present invention, and Fig. 2 is a vertical sectional view showing the state in which the heating section of the heating device is installed in the bathtub. , 3rd
The figure is a longitudinal sectional view showing the main body of the heating device installed on the wall, Figure 4 is the electric circuit 1 of the heating device, and Figure 5 is a conventional electric bath pot installed in the bathtub. FIG. 1. Heating section, 5 Bathtub, 11 Heating pipe, 15
Induction heating means, 25 Control parts, 26 - Insulation transformer. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] A heating unit is provided with an induction heating means that heats and swirls water in a heating pipe connected to a bathtub, and a control component for controlling the induction heating means and the induction heating means are connected via an insulation transformer. and control parts, 1,...,1. A heating device for an electric bath kettle that has a high-insulation transformer installed outside the heating section.