Heat collection tool

Abstract

To provide a heat collection tool which is used for sufficiently heating a heated object by heat from a burner, and in which a sufficient heating efficiency can be improved.SOLUTION: A heat collection tool 1 includes: an external heat connection body 10 which has a cylinder 11 on which a discharge hole 11a is formed, a top plate 12 which is provided on an upper part of the cylinder 11 and on which a heated object 2 is placed, a bottom plate 13 which is provided on a lower part of the cylinder 11 and on which an attachment opening 13a is formed, and a distribution plate 14 in which an inner space IS is formed by the cylinder 11, the top plate 12 and the bottom plate 13, and which is provided in the inner space IS; and an internal heat collection body 20 which has a cylindrical shape, and is fitted in the attachment opening 13a of the external heat collection body 10, and in which the opening 20b on a lower face side takes in air heated by the gas burner 3, and the intake air is sent into the inner space IS of the external heat collection body 10.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a heat collecting device that heats an object to be heated using air heated by a burner or the like. [Background technology]

[0002] Conventionally, in gas stoves, gas ranges, etc., a trivet made of a frame is placed around the gas burner, and objects to be heated, such as pots and kettles, are placed on this trivet. However, because there is an open space around the gas burner except for the trivet, the air heated by the gas burner easily dissipates to the outside without being used to heat the objects to be heated, resulting in poor heating efficiency.

[0003] To solve this problem, the following trivet has been proposed. The trivet has a burner opening through which the gas burner protrudes and is equipped with a shield wall placed on the range stand, a skirt part protruding from the underside of the shield wall and covering the gas burner, and a number of radial fins protruding from the upper surface of the shield wall and extending radially from the periphery of the gas burner opening toward the outer periphery of the shield wall. The object to be heated is placed on the radial fins and heated.

[0004] With this trivet, most of the air heated by the gas burner flows from the center to the outside through the gaps formed between the bottom surface of the object to be heated, the shielding wall, and the radial fins. As a result, the bottom surface of the object to be heated is heated directly by the heated air and also by the radial fins, which are heated by the heated air, improving heating efficiency (see Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Utility Model Application Publication No. 59-170106 [Patent Document 2] Japanese Utility Model Application Publication No. 59-158906 [Patent Document 3] Japanese Utility Model Application Publication No. 57-91006 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the conventional example, the heated air is immediately dissipated to the outside after passing through the gap formed between the bottom surface of the heated object, the shielding wall, and the radial fins, so the distance over which the heated air exchanges heat is short, and the heat of the heated air is not sufficiently exchanged, making it difficult to achieve sufficient improvement in heating efficiency.

[0007] Furthermore, since the radial fins are open to the outside, they are cooled by the outside air, and from this point of view as well, the heating efficiency is not sufficiently improved.

[0008] An object of the present invention is to provide a heat collecting device in which heat from a burner is sufficiently used to heat an object to be heated, thereby achieving a sufficient improvement in heating efficiency. [Means for solving the problem]

[0009] The present invention has been made in consideration of the above problems, and is characterized by comprising: (1) an external heat collector having a cylindrical body with a discharge hole formed therein, a top plate arranged on the upper part of the cylindrical body and on which an object to be heated is placed, and a bottom plate arranged on the lower part of the cylindrical body and having an attachment opening formed therein, wherein an internal space is formed by the cylindrical body, the top plate, and the bottom plate, and a straightening plate is provided in the internal space; and an internal heat collector having a cylindrical shape, fitted into the attachment opening of the external heat collector, and sending heated air drawn in from an opening on the underside into the internal space of the external heat collector.

[0010] (2) In the above (1), the straightening plate extends radially from the periphery of the mounting opening toward the inner circumferential surface of the cylindrical body.

[0011] (3) In the above (1) or (2), the current plate is inclined obliquely with respect to the vertical direction of the bottom plate.

[0012] (4) In the above (1) or (2), the straightening plate extends in a direction inclined obliquely with respect to the radial direction.

[0013] (5) In the above (1) or (2), the current plate is characterized in that its lower end surface abuts against the bottom plate and its upper end surface abuts against the top plate.

[0014] (6) In the above (1) or (2), the internal heat collector has a conical shape, with a small diameter portion located in the internal space and a large diameter portion located at least below the lower surface of the bottom plate.

[0015] (7) In the above (1) or (2), an opening is provided in the top plate, and a lattice-shaped metal member is installed across the opening. [Effects of the Invention]

[0016] According to the present invention, the heated air is taken into the interior of the internal heat collector and the external heat collector and passes through them, so the distance over which the heated air exchanges heat is long and the heat of the heated air is sufficiently exchanged. Furthermore, because the rectifying plate is disposed inside the external heat collector, the rectifying plate is not cooled by the external air. As a result, it is possible to provide a heat collector in which the heat from the burner is sufficiently used to heat the object to be heated and heating efficiency is sufficiently improved. [Brief explanation of the drawings]

[0017] The drawings illustrate particular embodiments of the present invention, including essential features of the invention as well as alternative and preferred embodiments. [Figure 1] FIG. 2 is an exploded perspective view of the heat collecting device according to the first embodiment. [Figure 2] FIG. 1 is a cross-sectional view of a heat collecting device according to a first embodiment. [Figure 3] 1A and 1B show a first embodiment, in which (a) is a plan view of one current plate, and (b) is a cross-sectional view taken along line III(b)-III(b) in (a). [Figure 4]FIG. 10 is a perspective view of an external heat collector according to a second embodiment. [Figure 5] FIG. 10 shows the second embodiment, and is a view of the assembled state of the external heat collector and the internal heat collector as seen from the inside. [Figure 6] FIG. 10 is a plan view of a bottom plate and a rectifying plate according to a second embodiment. [Figure 7] FIG. 10 is a perspective view of a modified example of a flow rectifying plate. [Figure 8] FIG. 10 is a side view of a heat collecting device according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0018] Each embodiment will be described in detail below with reference to the accompanying drawings. In this example, a description of already known technologies will be omitted. Furthermore, the following examples illustrate devices and methods for embodying the technical idea of ​​the invention, and the technical idea of ​​the present invention is not limited to the following. Various modifications can be made to the technical idea of ​​the present invention within the scope of the matters described in the claims. In particular, it should be noted that the drawings are schematic and may differ from the actual product.

[0019] (First embodiment) 1 to 3 show a first embodiment. The heat collecting device 1 includes an external heat collector 10, an internal heat collector 20 disposed inside the external heat collector 10, and an auxiliary top plate 30 placed on the upper surface of the external heat collector 10.

[0020] The external heat collector 10 has a cylindrical body 11, a top plate 12 arranged on the upper surface of the body 11, a bottom plate 13 arranged on the lower surface of the body 11, and a number of straightening plates 14 arranged in the internal space IS thereof.

[0021] The upper part of the cylindrical body 11 is provided with a number of exhaust holes 11a spaced equally apart along the circumference. At the lower end of the cylindrical body 11, a plurality of skirt portions 16 extend downward at intervals along the circumference. Each skirt portion 16 is continuous with the cylindrical shape of the cylindrical body 11 and is located below the bottom plate 13. A space is formed between adjacent skirt portions 16. This space is provided for placing a trivet 5 with a diameter larger than the dimensions of the cylindrical body 11, and by placing it in this space, the trivet 5 can be stabilized. It also serves as an air supply path for supplying fresh air to the gas burner 3.

[0022] In this first embodiment, the top plate 12 is formed integrally with the cylindrical body 11. An object to be heated, such as a pot, is placed on the upper surface of the top plate 12. A central opening 12a is provided in the center of the top plate 12. A number of heat ports 12b are provided on the top plate 12 outside the central opening 12a. The heat ports 12b have an elliptical shape that is long in the circumferential direction, and are arranged along three circles with different radial distances.

[0023] In this first embodiment, the flame vents 12b are arranged in three rows, but they may be arranged in two rows, one row, or four or more rows, and the hole shape does not have to be oblong, and any shape is acceptable.

[0024] A peripheral protrusion 12c is provided around the entire circumference on the outer periphery of the top surface of the top plate 12. Therefore, the top surface of the top plate 12 is one step lower on the inside of the peripheral protrusion 12c. The bottom plate 13 is provided with a large mounting opening 13a at the center.

[0025] The multiple rectifying plates 14 are arranged in an internal space IS defined by the cylindrical body 11, the top plate 12, and the bottom plate 13. In this first embodiment, the multiple rectifying plates 14 are fixed to the bottom plate 13.

[0026] The numerous rectifying plates 14 are arranged at equal intervals along the circumferential direction of the mounting opening 13a. The numerous rectifying plates 14 extend from the peripheral edge of the mounting opening 13a of the bottom plate 13 to the outer circumferential edge of the bottom plate 13 (to the inner circumferential surface of the cylindrical body 11 in the assembled state). As shown in Fig. 2, the upper end surface of each rectifying plate 14 abuts against the inner surface of the top plate 12. In other words, the internal space IS is partitioned in the circumferential direction by adjacent rectifying plates 14.

[0027] As shown in FIGS. 3( a ) and 3 ( b ), each of the current plates 14 is inclined obliquely with respect to the radial direction R and also with respect to the vertical direction V of the bottom plate 13 .

[0028] The internal heat collector 20 has a cylindrical shape like a truncated cone and is fitted into the mounting opening 13a of the bottom plate 13. The internal heat collector 20 has openings on both the top and bottom surfaces, with the top surface having a smaller diameter and the bottom surface having a larger diameter. The opening 20a on the top surface of the internal heat collector 20 abuts against the inner surface of the top plate 12. In this first embodiment, the bottom end of the internal heat collector 20 is set at the same height as the bottom surface of the bottom plate 13. The opening 20b on the bottom surface of the internal heat collector 20 is located directly above the gas burner 3, as shown in FIG. 2.

[0029] A large number of heat induction ports 20c are provided at equal intervals along the circumferential direction on the upper part of the internal heat collector 20. Each heat induction port 20c is located above the internal space IS of the external heat collector 10. In this first embodiment, each heat induction port 20c has a horizontally elongated elliptical shape, but the shape is not critical.

[0030] The auxiliary top plate 30 is disk-shaped and has a diameter slightly smaller than the diameter of the peripheral protrusion 12c of the top plate 12. In other words, when the auxiliary top plate 30 is placed on the top surface of the top plate 12, it is positioned so that it fits into the peripheral protrusion 12c of the top plate 12. This allows the auxiliary top plate 30 to be placed on the top surface of the top plate 12 in an accurate position without misalignment.

[0031] Auxiliary top plate 30 is provided with a central opening 30a that is smaller in size than central opening 12a of top plate 12. A lattice-shaped metal member 31 is installed across central opening 30a. This allows auxiliary top plate 30 to be selectively used during heating, and is convenient when heating an object to be heated 2 (for example, a small pot or mug) that is smaller in size than central opening 12a of top plate 12.

[0032] The cylindrical body 11, top plate 12, bottom plate 13, and rectifying plate 14 of the external heat collector 10, as well as the internal heat collector 20, are made of materials with good thermal conductivity, preferably copper or aluminum. Copper has a thermal conductivity of 398 w / (m·k), and aluminum has a thermal conductivity of 398 w / (m·k). Furthermore, the connection points (bonding points) between the cylindrical body 11, top plate 12, bottom plate 13, and rectifying plate 14 of the external heat collector 10 and other components of the internal heat collector 20 are preferably in complete contact. However, the bottom plate 13 may be made of iron, and the connection points (bonding points) do not need to be in complete contact.

[0033] Next, we will explain the heating method using the heat collector 1. As shown in Fig. 2, a trivet 5 made only of frame material is installed in a position surrounding the gas burner 3 on the stove top 4. The heat collector 1 is placed on this trivet 5. Then, the lower surface of the internal heat collector 20 is positioned directly above the gas burner 3, and the opening 20b at the lower end of the internal heat collector 20 is open in a position that covers a wide area above the gas burner 3.

[0034] The object to be heated 2 is placed on the top plate 12, and the gas burner 3 is ignited. The air around the gas burner 3 is heated, and the heated air resulting from the flame and heat rises due to its light specific gravity. As a result, new air enters the space below the rising heated air from the spaces between adjacent skirt portions 16 and from below the skirt portions 16, and this process is repeated, so that heated air is continuously generated by the gas burner 3.

[0035] The heated air rising from around the gas burner 3 is sucked into the opening 20b on the bottom surface of the internal heat collector 20, and rises due to the chimney effect inside the internal heat collector 20. Of the heated air that has risen inside the internal heat collector 20, that which reaches the central opening 12a of the top plate 12 comes into contact with the bottom surface of the object 2 to be heated, thereby directly heating the object 2 to be heated.

[0036] The heated air that rises inside the internal heat collector 20 is led into the internal space IS through the flame heat induction port 20c because the pressure is lower on the internal space IS side of the external heat collector 10 than inside the internal heat collector 20. If the bottom surface of the object to be heated 2 is above the flame heat port 12b of the top plate 12, the heated air led into the internal space IS comes into contact with the bottom surface of the object to be heated 2 and directly heats the object to be heated 2.

[0037] On the other hand, most of the heated air introduced into the internal space IS proceeds toward the outer periphery of the internal space IS while being guided by the straightening plate 14, and is discharged to the outside through the discharge hole 11a of the cylindrical body 11. The heat collector 1 is heated by the heated air passing through the interior as described above, and heats the object to be heated 2 placed on the heat collector 1. Therefore, the object to be heated 2 is heated by direct contact with the heated air and by direct contact with the heat collector 1 which has been sufficiently heated by the heated air as described above.

[0038] Here, most of the air heated by the gas burner 3 is taken into the interior of the internal heat collector 20 and the external heat collector 10, coupled with the air dispersion prevention effect of the skirt portion 16, but the distance over which the heated air exchanges heat is long, and sufficient heat exchange is achieved between the heat collector 1 and the heated air. In addition, since the rectifying plate 14 is disposed in the internal space IS of the external heat collector 10, the rectifying plate 14 is not cooled by the external air.

[0039] As described above, the heat collector 1 has a cylindrical body 11 in which an exhaust hole 11a is formed, a top plate 12 arranged on the top of the cylindrical body 11 and on which the object to be heated 2 is placed, and a bottom plate 13 arranged on the bottom of the cylindrical body 11 and in which an attachment opening 13a is formed, and the cylindrical body 11, the top plate 12 and the bottom plate 13 form an internal space IS, and the external heat collector 10 has a number of straightening plates 14 provided in this internal space IS, and an internal heat collector 20 having a cylindrical shape, which is fitted into the attachment opening 13a of the external heat collector 10 and sends heated air drawn in by openings 20b on the underside into the internal space IS of the external heat collector 10.

[0040] Therefore, most of the air heated by the gas burner 3 is taken into the internal heat collector 20 and the external heat collector 10 and proceeds, but since the distance over which the heated air must exchange heat is long, sufficient heat exchange occurs between the internal heat collector 20 and the external heat collector 10. Since the rectifying plate 14 is disposed inside the external heat collector 10, the rectifying plate 14 is not cooled by the external air. As a result, the heat from the gas burner 3 is fully utilized to heat the object 2 to be heated, and heating efficiency is improved.

[0041] In other words, the proportion of the heat of the air heated by the gas burner 3 that is dissipated to the outside is extremely small, and the proportion of the heat of the air heated by the gas burner 3 that is used to heat the object to be heated 2 is very large, so the object to be heated 2 can be heated efficiently, resulting in excellent energy savings.

[0042] Each straightening plate 14 is inclined obliquely with respect to the vertical direction V of the bottom plate 13. Therefore, the heated air tends to move upward, and the upward moving heated air hits each straightening plate 14 at an angle, which promotes heat exchange with each straightening plate 14. As a result, this contributes to quick heating of the object 2 to be heated.

[0043] The numerous straightening plates 14 extend radially from the periphery of the mounting opening 13a toward the inner circumferential surface of the cylindrical body 11. Therefore, the heated air sent from the internal heat collector 20 into the internal space IS of the external heat collector 10 is guided by each straightening plate 14 to move in a regular airflow within the internal space IS toward the inner circumferential surface of the cylindrical body 11, promoting heat exchange and smoothly discharging to the outside through the discharge holes 11a of the cylindrical body 11. Because the heat-exchanged air is smoothly discharged to the outside of the heat collector 1, new heated air heated by the gas burner 3 is easily taken in by the internal heat collector 20, improving heat exchange performance. In this first embodiment, the heated air is sent into the internal space IS through the flame heat induction port 20c of the internal heat collector 20.

[0044] Each straightening vane 14 extends in a direction inclined obliquely with respect to the radial direction R. Therefore, the effective length of each straightening vane 14 is longer, and the contact area between the heated air and each straightening vane 14 increases, so each straightening vane 14 is heated quickly. As a result, this contributes to the rapid heating of the object 2 to be heated.

[0045] The lower end surface of each rectifying plate 14 abuts against the bottom plate 13, and the upper end surface abuts against the top plate 12. Therefore, heat is transferred directly from the bottom plate 13 to each rectifying plate 14, and heat is transferred directly from each rectifying plate 14 to the top plate 12, so that the external heat collector 10 itself is heated quickly. As a result, this contributes to the rapid heating of the object 2 to be heated.

[0046] The internal heat collector 20 has a conical shape, with its small diameter portion located in the internal space IS and its large diameter portion located on the bottom plate 13. Therefore, the large diameter portion draws in heated air from a wide space, and the small diameter portion collects the drawn air toward the center, improving the heat collection effect.

[0047] A plurality of skirt portions 16 extend downward at intervals in the circumferential direction at the lower end of the cylindrical body 11. Each skirt portion 16 prevents the air heated by the gas burner 3 from escaping to the outside, thereby contributing to improved heating efficiency.

[0048] (Second embodiment) A second embodiment is shown in Figures 4 to 6. The heat collecting device of the second embodiment is composed of an external heat collector 10 and an internal heat collector 20, similar to the first embodiment, but the configuration of the external heat collector 10 is different.

[0049] 4, the cylindrical body 11 of the external heat collector 10 has discharge holes 11a formed at equal intervals along the circumferential direction, as in the first embodiment, but the size of the discharge holes 11a is set larger than that in the first embodiment. The discharge holes 11a also serve as portions for engaging the locking claw portions 13b of the bottom plate 13A described below.

[0050] As in the first embodiment, the top plate 12 has a central opening 12a in the center, and a lattice-shaped metal member 15 is installed in the central opening 12a. As shown in Fig. 5, when the top plate 12 is viewed from the inside with the external heat collector 10 and the internal heat collector 20 assembled, the lattice-shaped metal member 15 installed on the top plate 12 can be seen.

[0051] In the first embodiment, multiple flame holes 12b were provided outside the central opening 12a of the top plate 12, but in this second embodiment, no flame holes 12b are provided. Instead, very shallow grooves 12d extending radially are provided at equal intervals in the circumferential direction. This is to prevent problems such as the bottom of the object 2 to be heated placed on the top plate 12 sticking to it and becoming stuck.

[0052] 6, the bottom plate 13A is provided on its outer peripheral edge with locking claws 13b spaced at equal intervals in the circumferential direction. The bottom plate 13A is attached to the cylindrical body 11 by locking each locking claw 13b into a discharge hole 11a of the cylindrical body 11.

[0053] The other configurations are the same as those in the first embodiment, and therefore will not be described again to avoid duplication.

[0054] In this second embodiment, the same effects as in the first embodiment can be obtained.

[0055] In the second embodiment, a central opening 12a is provided in the top plate 12, and a lattice-shaped metal member 15 is installed across the central opening 12a. Therefore, the flame and heat directly hit the bottom surface of the object to be heated 2 through the gaps in the lattice-shaped metal member 15, and heat is also directly transferred from the lattice-shaped metal member 15, so that the object to be heated 2 is heated quickly.

[0056] (Variation) 7 shows a modified example of the rectifying vane 14A. While the rectifying vane 14 of the first embodiment extends in a straight shape, the rectifying vane 14A of this modified example extends in an arc shape. In this modified example, the effective length is longer than that of the straight vane 14, thereby improving the heat exchange efficiency. As in the first embodiment, if each rectifying vane 14A is configured to be inclined obliquely with respect to the vertical direction V of the bottom plate 13 and to extend in a direction inclined obliquely with respect to the radial direction R, the heat exchange efficiency can be further improved.

[0057] 8 shows a heat collector 1A to which a modified internal heat collector 20 is applied. The lower part of the modified internal heat collector 20 protrudes downward from the lower surface of the external heat collector 10. This is an effective configuration when the gas burner 3 and the heat collector 1A are placed far apart.

[0058] In the first and second embodiments, the heat collector 1 may be configured so that each component cannot be disassembled, or may be configured so that each component can be disassembled. If the heat collector 1 can be disassembled, it is preferable from the viewpoint of cleaning, maintenance, etc.

[0059] In the first and second embodiments, the multiple rectifying plates 14 are fixed to the bottom plates 13, 13A, which provides excellent ease of handling and assembly. The multiple rectifying plates 14 may also be fixed to the top plate 12 or the like.

[0060] In the first embodiment, the heat collecting apparatus 1 is placed on a conventional trivet 5, but the heat collecting apparatus 1 itself may be provided with a trivet-shaped member integrally therewith.

[0061] In the first embodiment, the burner is a gas burner 3, but it may be a burner that burns something other than gas (for example, solid fuel).

[0062] Although the embodiments have been described in detail above, the present invention is not limited to the specific embodiments, and various modifications and changes are possible within the scope of the claims. Furthermore, it is also possible to combine all or a plurality of the components of the above-described embodiments. [Explanation of symbols]

[0063] 1,1A heat collection equipment 2. Heating object 3 Gas burner (burner) 10 External heat collector 11 Cylinder 11a Drain hole 12 Top plate 12a center opening 13,13A bottom plate 13a Mounting opening 14,14A rectifier plate 15 Lattice-shaped metal member 20 Internal heat collector 20b Opening on the bottom IS interior space

Claims

1. an external heat collector having a cylinder with a discharge hole formed therein, a top plate disposed on the cylinder and on which an object to be heated is placed, and a bottom plate disposed on the cylinder and on which an attachment opening is formed, the cylinder, the top plate, and the bottom plate defining an internal space, and a rectifying plate provided in the internal space; a cylindrical internal heat collector that is fitted into the mounting opening of the external heat collector and that draws heated air in through an opening on the underside and sends it into the internal space of the external heat collector.

2. The heat collecting appliance according to claim 1, wherein the rectifying plate extends radially from a periphery of the mounting opening toward an inner peripheral surface of the cylindrical body.

3. The heat collecting appliance according to claim 1 or 2, wherein the current plate is inclined obliquely with respect to a direction perpendicular to the bottom plate.

4. The heat collecting appliance according to claim 1 or 2, wherein the current plate extends in a direction inclined obliquely with respect to the radial direction.

5. The heat collecting appliance according to claim 1 or 2, wherein the rectifying plate has a lower end surface abutting against the bottom plate and an upper end surface abutting against the top plate.

6. The heat collecting appliance according to claim 1 or 2, wherein the internal heat collector has a conical shape, a small diameter portion of which is located in the internal space, and a large diameter portion of which is located at least below the lower surface of the bottom plate.

7. The heat collecting appliance according to claim 1 or 2, wherein an opening is provided in the top plate, and a lattice-shaped metal member is installed across the opening.

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