JP2000082575A - Rapid heating method and rapid heating device of heating metallic matrix, and rapid heating device in electric heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a system compact and enhance heat exchange efficiency, by incorporating a heater into a sintered-metal porous element mounted in a heating metal matrix, passing a fluid through the sintered-metal porous element heated by the heater, and thereby rapidly heating the fluid and the heating metal matrix at the same time. SOLUTION: By applying power through a cable 7 to a heater 4 or heating element, the heater 4 is rapidly heated, and rapidly heats, by utilizing the heat conductivity of a sintered-metal porous element 3 surrounding the heater 4, a heating metallic matrix 1 that forms a tubular inner chamber 2 while, by passing a fluid through the sintered-metal porous element 3 heated by the heater 4, the fluid is rapidly heated by utilizing the air permeability of the sintered- metal porous element 3, and thus the heating metal matrix 1 and the fluid are rapidly heated at the same time with the heater 4 used as a heating element, through the medium of the sintered-metal porous element 3. Temperature control is performed by means of a temperature sensor 5 embedded in the heating metal matrix 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for rapidly heating and controlling the temperature of a fluid such as a gas (gas, air), liquid, etc., instantaneously. In the field of metal processing, food processing, and the like, the present invention can be applied to rapid heating of fluids and temperature control when supplying fluids requiring temperature control.

[0002]

2. Description of the Related Art As a means for heating a fluid such as a gas (gas, air) and a liquid, there is a method of heating a fluid while passing through a pipe or a manifold. For example, a method of heating instantaneously by passing air or wind through a coil-shaped heater element such as a hair dryer, or equipping the heater element with some kind of heat exchange fin to heat the fluid. In addition, the metal block is provided with a heater to provide a complicated intersecting passage, and the fluid is heated while passing through the passage.

[0003]

The method of heating a fluid while passing through the above-mentioned passage has a problem that heat exchange efficiency is poor and a lot of processing time and installation space are required. The hair dryer method has a problem that when a plurality of thin heater elements are formed in a coil shape, the heat exchange efficiency is good.
In addition, when the liquid is heated, the efficiency is poor due to the small heat conduction area on the surface of the heater, and the area and volume of the heater are increased due to the need for high heater capacity and high calories. Therefore, the present invention provides a gas (gas,
It is an object of the present invention to provide a means for heating a fluid such as a liquid, a liquid, etc., to instantaneously heat the fluid to make the system compact and increase the heat exchange efficiency.

[0004]

According to a first aspect of the present invention, a heater is used as a heating element, and a fluid passes through a sintered metal porous element heated by the heater to utilize the air permeability of the sintered metal porous element. The fluid is rapidly heated, and the sintered metal porous element is provided in the heated metal matrix, and the heated metal matrix is rapidly heated by utilizing the thermal conductivity of the sintered metal porous element. According to a second aspect of the present invention, a heater as a heating element is provided inside a sintered metal porous element, and the sintered metal porous element is mounted on a heating metal base to form a fluid passage penetrating the sintered metal porous element.
According to a third invention of the present application, in the second invention, the sintered metal porous element is cylindrical and a heater is provided in the center of the cross-section, and the sintered metal porous element is divided into a plurality of pieces in the longitudinal direction thereof. A plurality of heating chambers are formed by the tie metal porous element. A fourth invention of the present application is the heating metal matrix according to the first invention, wherein the heating metal matrix is positioned so as to face cooked food in a cooking chamber in an electric heating cooker, and a part thereof forms a cooking heating surface. And a blower for supplying air to a heated air passage penetrating through the sintered metal porous element of (1), and an outlet of the heated air passage is located at a cooking heating surface.

[0005]

According to a first aspect of the present invention, a current is supplied to a heater serving as a heating element to rapidly heat a heated metal base using the thermal conductivity of a sintered metal element and to utilize the air permeability of a sintered metal porous element. Then, the fluid is rapidly heated by the fluid passing through the sintered metal porous element heated by the heater. The second invention of the present application is to heat the sintered metal element by energizing a heater as a heating element, thereby rapidly heating the heated metal base by utilizing the thermal conductivity of the sintered metal element, The fluid is rapidly heated by utilizing the air permeability of the element and passing the fluid through a fluid passage penetrating the sintered metal porous element. According to a third aspect of the present invention, in the second aspect, a plurality of heating chambers are formed by a sintered metal porous element, and a fluid passing through each heating chamber and a flow rate of the fluid can be selected. The fourth invention of the present application forms heating hot air blown from the heating surface in the cooking chamber toward the cooking food in the cooking chamber when the food is cooked by the electric heating cooker, and heats the cooking food in the cooking chamber from the heating surface. The radiant heat generated by the heating of the metal base and the heating hot air from the outlet of the fluid passage are simultaneously heated.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. In the first embodiment shown in FIGS. 1 and 2, a cylindrical inner chamber 2 is formed in a heated metal base (metal body to be heated) 1. Heater (cartridge heater)
The interior chamber 2 is equipped with a sintered metal element 3 having an interior 4. A temperature sensor 5 is embedded in a heated metal base (heated metal body) 1. The sintered metal element 3 is a product made of sintered metal of bronze, stainless steel, or another metal material.

In the embodiment, the heater 4 is a cartridge heater. However, an electric heating means in which a heating wire is surrounded by an insulator and covered with a metal case can be applied, and the cross section of the metal case is circular. The shape is not limited, and may be an elliptical shape, a flat shape, or a band shape. The cross-sectional shape of the sintered metal porous element 3 and the inner chamber 2 is not limited to a circular shape, but may be an elliptical shape, a flat shape, a square shape, or any other appropriate shape. When the heater 4, the sintered metal porous element 3, and the inner chamber 2 are circular in cross section as in the embodiment, it is convenient to heat more uniformly in the cross section in the forward direction.

The sintered metal porous element 3 is made of bronze,
The product is made of stainless steel or a sintered metal of another metal material. Since the sintered metal porous element 3 is a sintered metal product of a metal material, a large number of sintered metal particles are connected to each other to form a predetermined shape (for example, a cylindrical shape).
It has a large number of continuous internal gaps, is generally used as a filter, and has air permeability.
In addition, since a large number of sintered metal particles are connected to each other, they have thermal conductivity.

When a current is passed through the cable 7 to the heater 4 as a heating element, the heater 4 is rapidly heated, and the heated metal base 1 is heated by utilizing the thermal conductivity of the sintered metal element 3 surrounding the heater 4. The sintered metal element 1 which is rapidly heated and heated by the heater 4
The heater 4 is used as a heating element by rapidly heating the fluid utilizing the air permeability of the sintered metal element 3 by passing the fluid through the sintered metal element 3. Are rapidly heated at the same time.

In the embodiment, the temperature control is performed on the temperature sensor 5 buried in the heating metal base 1, but the temperature sensor 5 detects the temperature of the sintered metal element 3 or the heater 4 so that the heater 4 is energized. It goes without saying that the temperature of the heated metal base and the sintered metal element can be controlled even if the temperature is controlled.

In the embodiment of the fourth invention shown in FIG.
Heater 4 provided inside heating metal matrix (metal body to be heated) 1
For the sintered metal element 3, the cylindrical sintered metal element 3 is divided into a plurality (four) in the axial direction of the single heater 4 via the seal portion 6. Seal part 6
Is that the cut surface of the sintered metal element 3 is cut in the cross-sectional direction, and the cut surface of the sintered metal element 3 is closed by closing the eyes of the sintered metal element 3 to form a seal structure. Although it can be configured without a special seal member, a blocking washer, or the like, the seal portion 6 may be configured with a sealing member, a blocking washer, or the like.

By dividing the sintered metal element 3 into a plurality of parts, the fluids can be different fluids (liquid and gas), and the flow rate of the fluid can be changed. The third embodiment shown in FIGS. 4 and 5 shows a case where the split sintered metal element system of the embodiment shown in FIG. 3 is applied to the generation of hot air.
Are heated by passing through the sintered metal element 3 during the anti-rotation to become the output air P2, and the inner chamber in which the sintered metal element 3 exists is isolated by the heat insulating seal ring 6, so that A plurality of heating chambers are formed in the sintered metal element by controlling different fluids (liquid, gas) or different flow rates and different temperatures.

FIGS. 6 and 7 show an embodiment of the third invention of the present application. In the heating metal base (manifold) 1, a heating molten material passage 11 is formed, and a temperature sensor 6 is provided. By controlling the melting temperature of the fluid and controlling the temperature of the fluid passing through the sintered metal element, the heated molten material and the fluid are simultaneously heated and the temperature is controlled.

In the embodiment shown in FIG. 6, heating of the manifold and generation of hot air are performed simultaneously. In the embodiment of FIG.
In addition to the generation of hot air according to the present invention, a separate heater 13 and a temperature sensor 14 for individually heating the manifold are provided to supply the molten hot melt and the heated air to the nozzle unit 10 of the hot melt coating apparatus.

In the embodiment described above, the sintered metal element 3
Has a cylindrical shape, and the heater has a rod shape with a circular cross section.
The shape may be an appropriate shape other than the cylindrical shape. For example, FIG. 8A shows a rectangular cross-sectional shape, and FIG. 8B shows a cross-sectional shape close to an elliptical shape. In addition, a case 1 a surrounding the heated metal matrix 1 around the sintered metal element 3.
And

In the embodiment, a plurality of cylindrical sintered metal elements 3 (4
9 are formed through the seal portion 6 to form a plurality (four) of independent heating chambers 8. However, in the rapid heating apparatus A ′ of the embodiment shown in FIG. By forming a plurality of (four) binding metal porous elements 3 with respect to a single heating metal matrix 1, a plurality of (four) heating chambers 8 independent of each other are formed. By supplying a fluid from a fluid supply source (not shown) to a fluid supply path 15 for each heating chamber 8 via a fluid supply control valve (not shown), the flow rate of the fluid passing through each heating chamber 8 is individually adjusted. Selectable. Further, since the heater 4 and the sintered metal porous element 3 for each heating chamber 8 are independent, the temperature sensors 5 for the individual heating chambers 8 are embedded in the heating metal matrix 1 and the energization to the heaters 4 is individually controlled. Thereby, the temperature of the fluid passing through each heating chamber 8 can be individually selected.

In the rapid heating apparatus A of the embodiment shown in FIG. 10, the heating metal base 1 has a flat plate shape, the upper surface thereof is a flat heating surface 1A, and the openings 16 of the heating chamber 8 are formed in a lattice shape. Is formed. The opening 16 communicates with the fluid source 17 via the heating chamber 8.

FIGS. 11 and 12 show an embodiment of the electric heating cooker according to the fourth invention of the present application in which the above-mentioned rapid heating devices A and A 'are applied as heating means. FIG. 11 shows an electric heating cooker M1 according to the first embodiment of the fourth invention, in which the rapid heating device A of FIG. 10 is applied as a heating means at the upper part of a cooking chamber. Source blower 1
The heating air Q is blown out from the opening 16 as 7a, and the flat heating surface 1 is
By heating A, radiant heat R is generated from the flat heating surface 1A. Cooking food 19 placed on a shelf 18 in the cooking chamber
Is heated from above by radiant heat R and heated air Q. The lower side of the cooked food 19 is heated by a known heating device (electric type, gas type) 20.

FIG. 12 shows an electric heating cooker M2 according to a second embodiment of the fourth invention, in which the rapid heating device A of FIG. 10 is applied as a heating means at the lower part of the cooking chamber and a heating means at the upper center. As a heating means on the upper side of the cooking chamber, the rapid heating device A 'in FIG. 9 is applied. The heated air Q from the heated metal base 1 of the rapid heating device A 'on the upper side is
And is blown toward the upper side of the cooked food 19, but by providing a guide means, a heated air passage (for example, a heated air passage 22), etc., the heated air is more heated than the side of the cooked food 19 and the like. , The surroundings of the cooked food 19 during the heating and cooking can be wrapped with the heated air.

Further, an exhaust passage 23, a suction fan 25, and an exhaust duct 26 are added, and a part of the exhaust passage 23 is brought into contact with the heating metal base 1 of the rapid heating device A 'to heat it. 24, a catalyst chamber is formed, the oil smoke removal catalyst 24 in the catalyst chamber is maintained at a predetermined catalysis temperature, and the oil smoke generated during cooking when the cooked food 19 is fish is removed by the oil smoke removal catalyst 24. By reducing or reducing the amount of exhaust gas 26, the exhaust gas 26 from the exhaust duct 26 that has purified oil smoke and the like is discharged.

The temperatures of the heated air Q and the radiant heat R can be partially and rapidly raised and lowered by controlling the power supply to the heater 4. Further, based on the detection of the temperature sensor 5, automatic control can be performed in accordance with cooking food and cooking content by microcomputer control. Further, the radiant heat R and the heated air Q from the heated metal base 1 can be partially set to a predetermined high temperature.

[0022]

According to the present invention, a small-sized and high-calorific heater can be used as a heating means for a fluid such as a gas (gas, air) or a liquid so that heat can be efficiently exchanged and a liquid or a gas can be instantaneously converted. Has the effect of increasing the temperature. This is a heat exchange method that is compact, robust, can be installed in narrow mechanical elements, and can save energy. The electric heating cooker equipped with the rapid heating device of the present invention forms hot air for heating blown from the heating surface in the cooking chamber toward the cooking food in the cooking chamber, and radiates heat from the heating surface to the cooking food in the cooking chamber. By simultaneously heating with the hot air for heating from the outlet of the fluid passage, the cooked food can be cooked with the surface wrapped in the hot air to provide a delicious heated food. In addition, the cooking room temperature and the cooking room temperature distribution can be rapidly changed according to the cooking food and the cooking content, and a delicious heated food can be provided corresponding to various food cooking.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of a rapid heating device in a longitudinal direction in plan view.

FIG. 2 is a vertical cross-sectional view showing a main part of the heating device in a transverse direction in plan view.

FIG. 3 is an axial longitudinal sectional view showing a sintered metal porous element used in an example of the third invention of the present application.

FIG. 4 is an axial vertical sectional view showing a sintered metal porous element for explaining the operation.

FIG. 5 is a longitudinal sectional view of the porous metal sintered element in a sectional direction.

FIG. 6 is a longitudinal sectional view of a spray coating device equipped with the rapid heating device of the present invention.

FIG. 7 is a longitudinal sectional view of a similar spray coating apparatus showing the embodiment.

FIG. 8 is a perspective view showing another embodiment of the heater and the sintered metal porous element.

9 shows an embodiment of the rapid heating device of the present invention, wherein FIG. 9A is a plan view and FIG. 9B is a longitudinal sectional view.

10 shows another embodiment as in FIG. 9; FIG. 10A is a plan view and FIG. 10B is a longitudinal sectional view.

FIG. 11 is a longitudinal sectional view of an electric heating cooker equipped with the rapid heating device of the present invention.

FIG. 12 is a longitudinal sectional view of an electric heating cooker showing another embodiment.

[Explanation of symbols]

 A Rapid heating device 1 Heated metal matrix (manifold) 2 Inner chamber 3 Sintered metal porous element 4 Heater (heater) 5 Temperature sensor 6 Seal section 8 Heating chamber

Claims (10)

[Claims] 1. A heater is provided inside a sintered metal porous element mounted on a heating metal base, and when the heater serving as a heating element is energized, the heating metal base is rapidly heated by utilizing the thermal conductivity of the sintered metal element. While heating, the fluid is allowed to pass through the sintered metal porous element heated by the heater, and the fluid is rapidly heated using the air permeability of the sintered metal element. A rapid heating method for a heated metal base, wherein the fluid and the heated metal base are simultaneously rapidly heated via a porous element. 2. The method for rapidly heating a heated metal matrix according to claim 1, wherein the temperature is controlled by a temperature sensor that detects the temperature of one of the heated metal matrix, the sintered metal porous element, and the heater. . 3. A sintered metal porous element is provided on a heating metal matrix, a heater is provided in the sintered metal porous element, and a fluid passage is formed through the sintered metal porous element. Utilizing the air permeability, the fluid passing through the sintered metal porous element and the fluid passage is rapidly heated by heating the sintered metal porous element by a heater, and the fluid and the heated metal base are simultaneously rapidly heated. Characterized by a rapid heating device for a heated metal matrix. 4. The fluid according to claim 3, wherein a temperature sensor is provided in one of the heated metal body, the sintered metal porous element, and the heater, and the temperature is controlled by the temperature sensor. And rapid heating device for heating metal matrix. 5. The fluid and heating metal according to claim 3, wherein the sintered metal porous element is a product made of a sintered metal of bronze, stainless steel, or another metal material. Maternal rapid heating device. 6. A sintered metal porous element, wherein a sintered metal porous element is provided on a heating metal matrix, a heater is provided inside the sintered metal porous element, and a fluid passage is formed through the sintered metal porous element. Utilizing the air permeability of the sintered metal porous element and the fluid passing through the fluid passage, by heating the sintered metal porous element with a heater,
Rapid heating simultaneously heats the fluid and the heated metal base simultaneously, and the sintered metal porous element has a cylindrical shape, and a heater is provided in the center of the cross section, and a plurality of sintered metal porous elements are arranged in the longitudinal direction. A rapid heating apparatus for a heated metal base, wherein a plurality of heating chambers are formed of sintered metal porous elements divided into individual pieces. 7. A rapid heating apparatus for a fluid and a heated metal base according to claim 6, wherein a fluid passing through each of the plurality of heating chambers can be selected. 8. The rapid heating of a fluid and a heated metal matrix according to claim 6, wherein the flow rate of the fluid passing through each of the plurality of heating chambers can be individually controlled. apparatus. 9. A heating metal base penetrating a sintered metal porous element in which a heater as a heating element is provided, wherein the heating metal base is positioned so as to face cooked food in a cooking chamber of an electric heating cooker. While constituting a cooking heating surface with a part thereof, a blower that supplies air to an inlet of a heating air passage penetrating the sintered metal porous element of the heating metal base is provided,
The outlet of the heating air passage is located at the cooking heating surface, and the heating surface in the cooking chamber is used to form heating hot air to be blown to the cooking food in the cooking chamber. A rapid heating device in an electric heating cooker, wherein heating is performed simultaneously by radiant heat caused by heating of the heating device and hot air for heating from an outlet of a heating air passage. 10. A cooking chamber comprising a plurality of said heating metal base bodies each having a heating surface formed by a part thereof and a group of hot air jets for heating formed at an outlet of a fluid passage formed in the heating surface. The rapid heating device in the electric heating cooker according to claim 9, wherein heating is performed in a plurality of directions toward the cooked food supported by the mounting shelf of (1).