HEATING PLATE

Abstract

An embodiment of the present invention discloses a heating plate comprising a cast iron blank, a heat generating tube and a heat insulating powder layer. Wherein the upper surface of the cast iron blank is provided with a recess for placing a heat generating tube. Thereof a heat-generating tube is pressing-fitted into the recess and is fitted with the recess, and both ends of the heat-generating tube are respectively provided with a leading pin perpendicular to the horizontal plane. And the upper surface of the heat-insulating powder layer where is provided two pin holes respectively connected with the heat generating tube leading pins, and the leading pins pass through the lead pin holes. And it is an object of the present invention to provide a heating plate with high efficiency and high reliability.

Claims

1. A heating plate characterized by comprising: a cast iron blank, a heat generating tube and a heat insulating powder layer. Wherein the upper surface of the cast iron blank is provided with a recess for placing the heat generating tube, and the upper face of the cast iron plate is sprayed. A heat-generating tube is press-fitted into the recess and is connected with the recess, and both ends of the heat-generating tube are respectively provided with a leading pin perpendicular to the horizontal plane. And in the upper surface of the heat-insulating powder layer, there are two leading holes which are fitted with the said leading pins respectively, and the said leading pins pass through said leading holes.

2. A heating plate according to claim 1, characterized by that said upper surface of said cast iron blank is provided with a spiral recess having a circular center point of said cast iron blank. The said heat generating tube being of a spiral shape. The heat generating tube which is fitted in the spiral recess. One of the leading pins is arranged on the first spiral recess near the center of the cast iron blank, and the other wire is arranged in the outermost spiral recess.

3. A heating plate according to claim 1, characterized by that the said cast iron blank has a flattening thickness of 14-15 mm and the said cast iron blank is made of gray cast iron having a thickness of 2.6 to 2.8 mm.

4. A heating plate according to claim 1, characterized by that the said upper surface of said cast iron blank is formed in a wave-like shape with recess in concavo-convex shape. And the recess has a depth of 5 mm for closely fitting with the heat generating tube.

5. A heating plate according to claim 1, characterized by that said heat generating tube is made of an iron-coated copper tube having a diameter of 6.6 mm and the said heating element in said heating tube is made of an iron-chromium-aluminum alloy in spiral shape. And the middle of the heat tube is filled with middle and high temperature magnesium oxide heat-insulation material.

6. A heating plate according to claim 1, characterized by that the said coating layer is a nano inorganic ceramic coating material having a thickness of 25 to 50 um.

7. A heating plate according to claim 1, characterized by that the said insulating layer is a composite material layer composed of quartz sand and kaolin material and has a thickness of 2 to 4 mm.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG. 1 is a schematic structural view of an embodiment of the present invention;

[0014] FIG. 2 is a schematic diagram showing the state of use of the embodiment of the present invention.

DETAILED DESCRIPTION OF REPRESENTATIVE EMBODIMENTS

[0015] In order to better explain the objects, technical solutions and advantages of the present invention, the invention will be described in further details below with reference to the drawings.

[0016] The heating plate comprises a cast iron plate blank 1, a heat tube 2 and a heat insulating powder layer 3. The upper surface of the cast iron plate is provided with a recess for placing a heating tube, which is round spiral recess based on the center of the cast iron plate. The upper surface of the cast iron plate is coated with a coating layer with spiral heating tube. The spiral heating tube is engaged in the spiral recess. And the both sides of the heat tube are respectively provided with a lead post which is perpedicular to the horizen plate. The heat insulating powder layer is fixed with two holes for leading pin of the heating tube. And the leading pin is arranged to pass through the lead pin hole, and one of the pin-posts is arranged near the middle of the cast iron plate. And the other one is disposed in the outermost one of the spiral recesses of the cast iron blank. The flat thickness of cast iron plate blank is 14-15 mm. The cast iron blank is forged with gray cast iron with thickness of 2.6-2.8 mm. The upper surface of the cast iron blank is a wave-shaped concave-convex shape with a recess depth of 5 mm, which is tightly fitted with the heat generating tube. The heating tube is made of the iron-plated copper tube with the diameter of 6.6 mm. The heating element in the heating tube is made of iron-chrome aluminum alloy wire. The middle part of the heating tube is filled with high-temperature magnesium oxide insulating material. The coating layer is a nano inorganic ceramic coating, and its thickness is 25-50 um. Insulation layer is composed of quartz sand, kaolin material composition of the composite layer, and its thickness is 2-4 mm.

[0017] The present invention, a heating plate, has a structure of with a cast iron blank, a heat generating tube and a heat insulating powder layer, Which bring double protection to the heat generating element. This heating plate simplifies the production process, removes the high temperature sintering and pressure at the end of stratification process, which can shorten 40% of the production time. Under the same production amount the number of workers can decreased by about 60%, comprehensively reduce the total cost of production by 7%, including production consumption and labor costs. The traditional products stored in a wet weather for a long time will make the product absorpt moisture, result from that the product will fail to pass the pressure test. And the product successfully solve the problem. Meanwhile direct heat transferring efficiency of the surface of the plate will be higher. And the time to boil water has also been improved, faster than the traditional heating plate about 1 minute. Changes in the structure will extent the product life of 30%. The surface of nano-inorganic ceramic coating will greatly enhance the performance of product especially performance of anti-corrosion rust and high temperature performance. Under the working condition, the heating element in the heating plate uses the iron chrome aluminum alloy resistance wire which has good heat generating performance and low cost. After the power is applied, the heating tube directly heat the heating plate cast iron blank, the heat transfer efficiency is higher. The blank is made of gray cast iron with a thickness of 2.6-2.8 mm. It is not easily deformed and cracked at high temperature. The surface layer has a wave and thread shape, which increases the heating area and better transfers the heat to the pot. While the inner plate layer is of insulation, so that reducing the loss of heat and the heat can be stored better in the plate, which make the plate be of better energy efficiency.

[0018] The above disclosure is only a preferred embodiment of the invention and it is of course not intended to limit the claim scope of the invention. It is intended that the same changes be made within the scope of the invention as defined above shall be under the claims of this invention.