JPH0532025Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention is a so-called heat pipe type hot plate in which a working fluid is sealed inside a metal hollow panel whose upper surface is a smooth heat dissipation surface (cooking surface). It is related to.

``Conventional technology'' For example, commercial hot plates used in restaurants etc. are used to handle large amounts of food (hamburgers,
Grill steaks, etc. In such cases, in order to maintain uniform quality, it is necessary to keep the temperature as constant as possible over the entire heat dissipating surface of the hot plate, but conventional hot plates made of a single plate of iron or stainless steel have little error. Since temperature control is difficult, recently, heat pipe type hot plates such as those described above are being used as hot plates, which enable more accurate temperature control and have good thermal efficiency.

Conventional heat pipe type hot plates are made of, for example, stainless steel (SUS304 etc.) and have a width of 1000 mm.
mm, depth 600mm, height 60mm, the top plate that makes up the heat dissipation surface has a wall thickness of 4 to 9mm, and the bottom plate that makes up the heat receiving part has a wall thickness of about 4mm.A hollow panel is manufactured, and an appropriate working fluid is sealed inside. This is what I did.

Then, the heat receiving part is heated with a gas burner or other heating device, and the heat is transferred to the top plate, which is the heat radiating surface, through the internal working fluid. It has a structure that burns.

``Problem to be Solved by the Invention'' In such a hot plate, the top plate that constitutes the heat dissipation surface is scraped or worn due to frequent turning with cooking utensils, resulting in gradual thinning of the top plate.

In this case, conventional hot plates made of a single plate such as iron or stainless steel are thick (approximately 30 mm) to maintain heat capacity, so there is no problem, but as mentioned above, heat pipe type hot plates have a top plate. Since the top plate is much thinner, if the thinning mentioned above is not noticed, it is expected that a hole will form in the top plate during use and the internal working fluid will come into contact with the food being cooked.

Furthermore, as the thinning described above progresses gradually, the holes are initially very small and in many cases, the hole is not even noticed, creating a risk that food that has come into contact with the hydraulic fluid may be eaten. .

An object of the present invention is to provide a heat pipe type hot plate having a structure that can prevent the above-mentioned situation.

"Means for Solving the Problem" In order to achieve the above-mentioned object, the present invention adopts a method in which the top plate constituting the heat dissipation surface is partially formed into multiple layers in the above-mentioned hot plate. It is.

Forming the top plate partially into multiple layers means that
This can be easily achieved by various known means.

For example, a counterbore hole of an appropriate depth is formed on the back surface of the top plate, a metal piece is stuffed into the counterbore hole, and the counterbore hole is sealed by welding or the like. The metal piece is
Preferably, the metal is of a different type from that of the top plate, and if this metal piece is much thinner than the depth of the sinkhole, a suitable metal blind plug is placed under the metal piece and the above-mentioned Weld as shown.

Alternatively, a similar counterbore hole may be formed on the surface of the top plate, one or more metal pieces may be driven into the hole and packed firmly and densely by other means, so that the top surface of the metal piece and the heat dissipation surface are flush with each other. level.

The portion of the top plate formed in multiple layers is preferably a central portion or a portion closer to the center than the peripheral portion of the top plate.

"Function" As described above, the heat pipe type hot plate according to the present invention has a top plate partially formed into multiple layers, so if the top plate loses thickness beyond a certain level, parts of the top plate will be partially formed on the surface of the top plate. Another metal layer appears or disappears, and its thinning beyond a certain level can be easily confirmed.

In this way, when it is confirmed that the thickness of the top plate has decreased beyond a certain level, by replacing the heat pipe with another heat pipe that does not have the thickness of the top plate, it is possible to prevent the situation where food to be cooked comes into contact with the working fluid. is prevented.

"Embodiments" Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

The heat pipe 1 in the shape of a hollow metal panel constituting the hot plate is manufactured from an iron plate, and includes a top plate 11 having a wall thickness of about 9 mm and forming a heat dissipation surface, and a side wall 13 and a heat receiving part each having a wall thickness of about 4.5 mm. Consists of 12 bottom plates, depth 600mm, width 1200mm,
It has a height of 120 mm, and has side plates 15 on both sides that are gradually lowered toward the front, and a non-condensable gas reservoir 14 is formed in the innermost part so as to communicate with it.

The upper plate 11 is partially formed into a plurality of layers by embedding metal pieces 3 made of copper plate at several locations in a position closer to the center than the periphery.

In this embodiment, as shown enlarged in FIG.
A counterbore hole 30 of an appropriate depth is formed on the back surface of the top plate 11, and a thin copper plate metal piece 3 is inserted into the counterbore hole 30.
, and then a blind iron plug 31 is packed under it.
The counterbore hole 30 is closed with welding 4 to firmly fix the metal piece 3 within the counterbore hole 30.

The heat pipe 1 is filled with, for example, diphenyl or a mixture of diphenyl and diphenyl oxide (for example, the trade name "Therm S300") or other suitable working fluid 2, and the bottom plate 12, which is the heat receiving part, is heated with gas. The temperature of the top plate 11, which is a heat radiation surface, is increased to 180 by heating with a burner or other heating device (not shown).
Hamburger steaks and other foods are grilled on the top surface of the top plate 11 while maintaining heating at around .degree.

When baking food, the food is frequently fried on top plate 11 using a cooking utensil (not shown), and as a result, the thickness of top plate 11 gradually decreases.
When the thickness of the top plate 11 decreases until it reaches the metal piece 3,
The metal piece 3 forming the other layer is exposed, and the state of thinning of the upper surface plate 11 beyond a certain level can be easily noticed by visual inspection.

If thinning of the top plate 11 is confirmed, the heat pipe 1 can be replaced with a new one to prevent the internal working fluid from coming into contact with the food being cooked.

Instead of the above structure, for example, the top plate 11
It is also possible to implement a structure in which a counterbore hole 30 as described above is formed on the surface of the counterbore, and metal pieces 3 made of a copper plate are driven into the counterbore hole and the metal pieces 3 made of a copper plate are densely packed by other means.

In this case, as the thickness of the top plate 11 decreases, the layer of metal pieces 3 appearing in that portion disappears, so that the thickness decrease of the top plate 11 beyond a certain level can be easily noticed.

As the material of the heat pipe 1, stainless steel or the like can be used in addition to iron, and it can also be carried out by stacking a plurality of metal pieces 3 made of the same or different metals in the same counterbore hole 30. can.

Even if the same material as the top plate 11 is used for the metal piece 3, the boundary between the metal piece 3 and other parts is noticeable, so it is difficult to confirm the appearance or disappearance of another layer formed by the metal piece 3. However, in order to make it more noticeable, it is more preferable that the metal piece 3 and the other parts of the top plate 11 be made of different metals as described above.

"Effect of the invention" Since the heat pipe type hot plate according to the invention has a top plate partially formed into multiple layers, the cook can easily notice the thinning of the top plate beyond a certain level. Therefore, various dangers due to contact between the food being cooked and the hydraulic fluid can be prevented.

In addition, it can be manufactured at a lower cost than when the entire surface of the top plate is formed in a plurality of layers.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a hot plate according to the present invention, and FIG. 2 is a partially enlarged sectional view of the top plate in FIG. Explanation of symbols in main figures, 1 is heat pipe, 11
1 is a top plate forming a heat dissipation surface; 12 is a bottom plate forming a heat receiving section; 13 is a side wall; 2 is a working fluid; 3 is a metal piece for partially forming the top plate into a plurality of layers;
0 is a sinkhole.

Claims (1)

[Scope of utility model registration request] A heat pipe type hot plate comprising a heat pipe in the shape of a hollow metal panel, characterized in that a top plate constituting a heat dissipation surface is partially formed into a plurality of layers.