JP2000058241A - Heating equipment - Google Patents

Abstract

(57) [Problem] To provide a heat exchange element having a large heat exchange area per unit volume to be subjected to heat exchange and capable of uniformly heating, and to maintain a shape with a comb-shaped spacer having an easy structure so that a liquid can be maintained. In the case of heating, a heating device that can be uniformly heated to a temperature close to the boiling point with a small volume heat exchange element and has high heat exchange efficiency is provided in a form that is easy to manufacture. SOLUTION: A heat exchange element for performing heat exchange with a gas or a liquid, a container of the heat exchange element, a heating coil for inductively heating the heat exchange element from outside the container, and a heating coil The heat exchange element includes a high-frequency power supply unit that supplies high-frequency power, the heat exchange element has a structure in which a conductor is formed in a spiral shape, a winding start and a winding end are electrically connected, and a winding interval is maintained by a comb-shaped spacer 203. It is a device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for heating a gas or a liquid.

[0002]

2. Description of the Related Art Conventionally, when heating a gas or liquid at a high speed, such as in an instant water heater, a gas heating method has been used.

[0003]

However, when water or hot water is heated at a high speed by the above-mentioned method, the gas burns in the heating section, so that the contact temperature between the heating section and water exceeds the boiling point, and the local temperature increases. Boiling will occur. In this case, a problem such as scorching of the heating unit occurs, so that the temperature of the fluid heating unit must be reduced by some means. Therefore,
When heating with a heat source such as a gas, there is a problem that it is difficult to raise the temperature of the liquid to a high temperature near the boiling point, and a problem that the heat conversion efficiency is inevitably reduced.

[0004] The present invention provides a heating device for solving the above-mentioned problems, and comprises a heat exchange element having a large heat exchange area per unit volume for heat exchange and capable of uniformly heating, and has a structure. By maintaining the shape with an easy comb-shaped spacer, when heating the liquid, it is possible to uniformly increase the temperature to a temperature close to the boiling point with a small-volume heat exchange element, and to manufacture a heating device with high heat exchange efficiency. It is intended to be provided in an easy form.

[0005]

According to the present invention, there is provided a heat exchange element for exchanging heat with a gas or a liquid, a container for the heat exchange element, and a container for the heat exchange element. A heating coil for induction heating from outside the
High-frequency power supply means for supplying high-frequency power to the heating coil, wherein the heat exchange element has a structure in which a conductor is formed in a spiral shape, a winding start and a winding end are electrically connected, and a winding interval is maintained by a comb-shaped spacer. And a heating device.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first and second aspects of the present invention, a heat exchange element for exchanging heat with a gas or a liquid, a container for the heat exchange element, and the heat exchange element are disposed outside the container. A heating coil for induction heating, and a high-frequency power supply unit for supplying high-frequency power to the heating coil, wherein the heat exchange element electrically connects a winding start and a winding end by forming a conductor in a spiral shape, The heating device has a structure in which winding intervals are maintained by comb-shaped spacers.

Thus, the high-frequency power is supplied from the high-frequency power supply means to the heating coil, and the heat exchange element itself is heated by the principle of induction heating. The heat exchange element at this time is a spiral conductor in which the winding start and end are electrically connected, so that heating can be performed uniformly, and when heating a liquid, the boiling point can be reduced with a small volume heat exchange element. , And the heat exchange efficiency can be increased.
Further, by maintaining the interval of the spiral structure with the comb-shaped spacer, the heat exchange element can be easily manufactured.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, 101 is a heat exchange element for exchanging heat with a gas or liquid, and 102 is a heat exchange element 1.
01 is a heating coil for induction heating, 103 is a high-frequency power supply means for supplying high-frequency power to the heating coil,
104 is a fluid transfer means for transferring gas or liquid to the heat exchange element.

This configuration can be easily realized by using a stainless steel plate for the heat exchange element 101, an inverter circuit for the high frequency power supply means 103, and a pump for the fluid transfer means 104.

[0010] When heating is started by a user's instruction, the fluid transfer means 104 supplies gas or liquid to the heat exchange element 101. At the same time, the high-frequency power supply means 103 supplies power to the heat exchange element 101 by the heating coil 102.
At this time, the magnetic flux generated by the high-frequency current flowing through the heating coil passes through the inside of the stainless steel plate of the heat exchange element 101,
An eddy current is generated. Therefore, Joule heat is generated in the heat exchange element 101, and the gas or liquid comes into contact with the heated stainless steel plate, and heat exchange is performed. As described above, since the heating element performs heat exchange as it is, high heat exchange efficiency can be obtained.

FIG. 2 shows the structure of the heat exchange element 101. Here, reference numeral 201 shown by a solid line is a spiral structure made of a stainless steel plate, and the winding start and end are electrically connected by a connection structure 202. Since the stainless plate 201 forms an electric closed loop by the connection structure 202,
A uniform eddy current flows through the stainless steel plate 201. Therefore, since the Joule heat is also uniform, a uniform heat source having a large heat exchange area per unit volume can be realized by narrowing the interval between the spiral structures. By forming an electric closed loop using the connection structure 202 in this manner, a large eddy current can flow even in non-magnetic stainless steel. In order to maintain this structure, inserting the comb spacer between the spirals makes it possible to easily maintain this configuration. Here, A is the total heat exchange area, Q is the amount of heat of the electric power supplied from the heat exchange element 101, h is the heat transfer coefficient which is a constant determined by the configuration of the water channel, and the temperature of the heat exchange element and the temperature of the fluid after heat exchange. Is ΔT, these relationships are ΔT = Q / (A ·
h). Therefore, when the amount of heat Q to be given is determined, the number of turns of the spiral structure is increased, and the heat exchange area is increased, so that the difference between the temperature of the heat exchange element and the temperature of the fluid after heat exchange, Δ
T can be reduced. When the fluid is water and it is desired to obtain hot water having a temperature close to the boiling point of 95 ° C., local boiling does not occur if the heat exchange area A is set so that ΔT is within 5 [deg].

By the operation described above, a heat exchange element having a large heat exchange area per unit volume to be subjected to heat exchange and capable of uniformly heating is formed, and the shape is maintained by a comb-shaped spacer having a simple structure. In addition, when heating a liquid, a heating device having a small volume can be uniformly heated to a temperature close to the boiling point, and a heating device having a high heat exchange efficiency can be provided in an easily manufactured manner.

In this embodiment, stainless steel is used as the conductor of the heat exchange element 101. However, it goes without saying that any conductor may be used as long as it generates an eddy current. Further, although a pump is used as the fluid transfer means 104, it is needless to say that when the fluid to be heated is water, the water pressure by opening and closing the faucet may be used. Further, when the gas or liquid to be heated is in contact with the heat exchange element 101 due to natural convection or the like, it is needless to say that it is not necessary to feed the gas or liquid by the fluid transfer means 104.

If the connection structure using the comb spacer is applied only to the upstream side of the gas or liquid flowing through the container of the heat exchange element, the mounting structure of the comb spacer can be simplified. Practicality can be improved.

[0015]

As described above, according to the first and second aspects of the present invention, high-frequency power is supplied to the heating coil from the high-frequency power supply means, and the heat exchange element itself is heated by the principle of induction heating. The heat exchange element at this time is a spiral conductor in which the winding start and end are electrically connected, so that heating can be performed uniformly, and when heating a liquid, the boiling point can be reduced with a small volume heat exchange element. , And the heat exchange efficiency can be increased. Further, by maintaining the interval of the spiral structure with the comb-shaped spacer, the heat exchange element can be easily manufactured.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a heating apparatus showing one embodiment of the present invention.

FIG. 2 is a diagram showing a structure of a heat exchange element of the heating device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 101 Heat exchange element 102 Heating coil 103 High frequency power supply means 104 Fluid transfer means 201 Spiral structure by stainless steel plate 202 Connection structure 203 Comb spacer

Continuing on the front page (72) Inventor Shinji Kondo 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. 3K059 AA08 AB22 AB28 AC33 AC37 AC54 AC62 AD03 AD05 AD22 AD35 CD52 CD74 CD77

Claims (2)

[Claims] 1. A heat exchange element for performing heat exchange with a gas or a liquid, a container for the heat exchange element, a heating coil for inductively heating the heat exchange element from outside the container, and the heating coil. High-frequency power supply means for supplying high-frequency power to the heat exchange element, wherein the heat exchange element has a structure in which a conductor is formed in a spiral shape, a winding start and a winding end are electrically connected, and a winding interval is maintained by a comb-shaped spacer. apparatus. 2. The heating device according to claim 1, wherein the comb spacer is provided only on the upstream side of the gas or liquid flowing through the container of the heat exchange element.