JP3053591B2 - Heating cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device, and more particularly to a cooking device that uses a duct to indirectly heat the inside of a refrigerator.

[0002]

2. Description of the Related Art For example, in a commercial heating cooker, a direct heating method in which hot air from a gas burner is directly introduced into a refrigerator, or a direct heating system in which hot air from a gas burner is introduced into a duct disposed in the refrigerator, indirectly. An indirect heating method for heating the inside of a refrigerator is known. On the other hand, a composite heating cooker that also enables steam cooking is known.However, when such a steam is introduced into a refrigerator, if a direct heating method is adopted, the steam enters the gas burner side and is ignited. In order to cause a defect problem, indirect heating methods have been often used in the past.

[0003]

However, the conventional indirect heating method has the following points to be improved. One end of the duct is connected to a partition plate that partitions the gas burner side from the inside of the refrigerator by welding or the like, and the other end is directly connected to the exhaust pipe. On the other hand, when heated hot air from the gas burner is introduced into the duct, the duct thermally expands and extends in the length direction. Then, since the load accompanying the elongation of the duct acts on both ends of the duct, that is, the joint portion, there is a possibility that a crack may be formed in the welded portion due to the load.

In addition, the following problems have been pointed out separately. That is, in the related art, the gas burner is disposed on the lower side of the storage, and the exhaust pipe is disposed on the upper side. That is, since these are directly added to the height dimension in the refrigerator, the height of the heating cooker is hindered.

[0005] The present invention has been devised in view of the above-mentioned conventional problems, and its object is to protect the joint portion of the duct, and another object is to reduce the height. It is to provide a cooking device that can be achieved.

[0006]

According to the first aspect of the present invention, the above object is achieved by introducing hot air from a gas burner into a plurality of ducts leading to an exhaust pipe. a cooking machine for indirectly heated, has and outer peripheral rotation axis in the horizontal direction in the chamber is one of a fan forming a circular are provided, the exhaust pipe and the gas burner is Ru arranged on the same side With this gas burner
And exhaust stack circulates only once for each fan
Piping with gaps in the length direction between
Connected by multiple ducts
Turns substantially U-shaped along the outer peripheral shape of the fan
Arc-shape that absorbs longitudinal elongation due to thermal expansion
Characterized by being provided as a spring portion .

According to a second aspect of the present invention, in the first aspect, at least one end of a portion where both ends of the duct are connected to the gas burner and the exhaust pipe,
The present invention is characterized in that the duct is allowed to be displaced in the length direction.

[0008]

[0009]

According to the first aspect of the present invention, when heated hot air from a gas burner is introduced into the duct, the duct expands with thermal expansion. It is absorbed by doing. Therefore, even when the end of the duct is joined to the fixing surface, no excessive force acts on the joint. In addition, since the gas burner and the exhaust pipe can be arranged on the same side, the height of the entire cooking machine can be reduced as compared with the case where the gas burner and the exhaust pipe are arranged at both ends without turning the duct. it can.

According to the second aspect of the present invention, since at least one end of the duct is attached in a state where displacement in the length direction is allowed, it is assumed that the duct expands in the length direction due to thermal expansion. Also, a more reliable absorbing action can be exhibited in combination with the spring portion.

[0011]

[0012]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIG. In the drawings, reference numeral 1 denotes a heating cooker 1 as a whole, which in this embodiment includes a gas burner 2 for gas cooking and a steamer 3 for steam cooking. It is of a type that can be freely selected (or simultaneously) introduced directly into the storage according to the type of cooking. The setting of such a cooking mode is performed by a control panel (not shown) provided on one side of the front surface of the casing 5 (the right side in FIG. 1).

The heating cooker 1 has a casing 5, and a left half of the inside of the casing 5 is a heating chamber 4, and a right half is a fan accommodating chamber 7 accommodating the gas burner 2, the steamer 3 and the like. I have. Among them, a door 8 that can be opened and closed is attached to the front of the heating cabinet 4, and a pair of left and right rails are provided inside the heating cabinet 4 at equal pitch intervals in the height direction. The cooking tray 6 can be pushed in and pulled out. Also,
An exhaust port 10 for adjusting the steam pressure in the refrigerator is opened on the bottom surface of the heating refrigerator 4 and communicates with the outside air.

A flat fan cover 11 is disposed inside the casing 5 on the side of the heating chamber 4. The fan cover 11 is erected from the bottom surface of the casing 5 via a suitable bracket or the like, and the entire periphery thereof forms a sufficient gap with the inner wall surface of the casing 5 so that the heating chamber 4 and the fan housing chamber 7 The heat is circulated. A circular through hole 12 is opened in the center of the fan cover 11, and a fan 13 is arranged concentrically with the back side of the fan cover 11 (the side opposite to the heating chamber 4). This fan 13 is driven by an electric motor,
The hot air in the heating chamber 4 can be circulated.

On the other hand, the fan 1
Above 3 is provided a support plate 14, on which the gas burner 2 and one end of the exhaust pipe are mounted. The gas burner 2 is attached to a position near the door 8 on the upper surface of the support plate 14, and is connected to a gas supply pipe and a primary air supply blower (both not shown). Hot air from the gas burner 2 is indirectly supplied into the heating chamber 4 via a duct 15 described below.

In this embodiment, five ducts 15 are used, each of which is bent substantially in a U-shape. More specifically, both ends of the duct 15 hang down substantially vertically from the support plate 14, and are then piped so as to surround the fan 13 while maintaining a certain interval from each other. Each duct 15 is suspended and supported as a whole by connecting both ends thereof by the support plate 14. As described above, each duct 15 is arranged in a substantially arc shape around the fan 13 and the entire duct 15 constitutes a spring portion according to the present invention. Even if it expands and deforms in the direction, it can be absorbed by the entire duct 15.

Now, each duct 1 is
As shown in FIG. 5, a total of five corners at each of the four corners and the center of each of the four corners are efficiently arranged.
In this embodiment, the end of each duct 15 on the gas burner 2 side is fixed to the support plate 14 by welding or the like, but the end on the exhaust pipe 17 side is provided on the support plate 14. Each of the through holes 16 and the insertion hole 17A formed in the exhaust pipe 17 are slidably inserted in the axial direction. Therefore, even if the duct 15 has an extension deformation, the extension of the duct 15 can be absorbed here, since the end of the duct 15 on the exhaust pipe 17 side is a free end.

Finally, in the casing 5, the fan 1
A steamer 3 is installed on the back side of 3. Steamer 3
Has a configuration in which a heating pipe 18 connected to a heat source (not shown) is immersed in a water storage tank.
The steam is blown out from the upper part of the heating chamber 4 through the heating chamber 4.

This embodiment is configured as described above. For example, when a steam cooking mode is selected by a control panel (not shown), the steamer 3 starts operating. When steam is generated in the steamer 3 by the heating pipe 18, the steam is blown into the heating chamber 4 through the steam passage 19, so that the food set in the heating chamber 4 is steam cooked.

On the other hand, when the cooking mode is selected, the gas burner 2 is ignited, and the combustion hot air from the gas burner 2 is introduced into each duct 15 and exhausted from the exhaust pipe 17. During this time,
The surrounding air is heated by each duct 15. Further, the fan 13 starts operating by selecting the heating cooking mode. After the air in the heating chamber 4 is sucked through the through hole 12 by the operation of the fan 13, the air flows between the fan cover 11 and the inner wall surface of the casing 5. It flows into the heating chamber 4 through the gap. In this way, the air heated by each duct 15 circulates, and through this process, the inside of the heating cabinet 4 is gradually heated, and the object to be cooked is cooked.

When hot combustion air flows through each duct 15, each duct 15 extends in the longitudinal direction due to thermal expansion. In this case, since each duct 15 is entirely bent in a substantially U-shape so as to entirely constitute a spring portion, the extension of each duct 15 is absorbed by such a spring function. Therefore, both ends of each duct 15 and the support plate 14
It can be avoided that a stress due to thermal strain acts on a joint portion with the substrate. Moreover, in this embodiment, each duct 1
The end of the exhaust pipe 17 on the side of the exhaust pipe 17 is slidably inserted in the length direction with respect to the support plate 14 and the exhaust pipe 17, so that even if the joint on this side expands and deforms, Each duct 15 can absorb this by moving forward and backward.

As described above, according to the present embodiment, it is possible to absorb the elongation deformation of each duct 15 due to heat and avoid the situation where stress acts on the joint with the support plate 14. Further, by bending each duct 15 in a U-shape, the gas burner 2 and the exhaust pipe 17 can be arranged in parallel on the upper side. Therefore, the gas burner 2 and the exhaust stack 17
Can be reduced in height as compared with a case in which the devices are arranged vertically with the duct 15 interposed therebetween.

FIG. 6 shows another embodiment of the present invention, in which two heat sources including a gas burner 2 and a duct 15 are installed up and down to increase the heating capacity. As shown in the drawing, the duct 15 is arranged in a projecting manner in the horizontal direction unlike the above-described embodiment. In this apparatus, a gas burner 2 is provided for each unit.
In comparison with the comparative example shown in FIG.

FIG. 7 shows a gas burner 2 below the heating chamber.
, And one exhaust pipe 17 is disposed above the heating chamber 4. Then, a plurality of ducts 15 are bypassed while bypassing the fans 13 arranged vertically and vertically between them.
Connected with. By the way, in these devices, the heating capacity is doubled, and the output of the gas burner 2 is also doubled accordingly. Therefore, in the configuration shown in FIG. 7, the end of the duct 15 on the side of the gas burner 2 is heated by twice the heating power of the related art, and the life of the duct is shortened. Also, since the duct length is long, the duct 15
The heat distribution becomes non-uniform in the upper and lower portions, causing unevenness in the food to be cooked. In this regard, as shown in FIG. 6, by setting the gas burners 2 individually,
Each of the units may have the same capacity as the conventional one, so that the life of the duct 15 is prolonged. Further, since the duct extends laterally, the piping of the duct 15 is easy. Furthermore,
Advantageous effects such as the problem of the burning village can be eliminated.

The present invention can be variously modified.
The following modifications are also included in the technical scope of the present invention.

In this embodiment, one end of each duct 15 and the support plate 14 are inserted so as to be able to move in and out, but they may be fixedly joined, and conversely, both ends can be moved in and out. Is also good.

In this embodiment, a case is shown in which the present invention is applied to a combined cooker that enables heating cooking by the gas burner 2 and steam cooking by steam. However, the steamer 3 is omitted, and a type in which only heating cooking by the gas burner 2 is performed. There may be.

Further, in this embodiment, the gas burner 2
And the exhaust pipe 17 are arranged on the same side, but they may be arranged on different sides with the duct 15 interposed therebetween. However, even in that case, it is necessary to form a spring portion in the middle of the duct 15 so as to absorb the elongation deformation due to heat.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the entire cooking device.

FIG. 2 is a front sectional view showing a schematic structure of the same.

FIG. 3 is a side sectional view schematically showing a duct portion.

FIG. 4 is an enlarged sectional view showing a connection portion between a duct and an exhaust pipe.

FIG. 5 is a plan sectional view showing an arrangement relationship of each duct.

FIG. 6 is a cross-sectional view schematically showing another embodiment.

FIG. 7 is a sectional view schematically showing a comparative example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cooking device 2 ... Gas burner 4 ... Heating chamber 5 ... Casing 14 ... Support plate 15 ... Duct 17 ... Exhaust cylinder

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-10-246438 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) F24C 1/00 F24C 1/00 360

Claims (2)

(57) [Claims] 1. A heating cooker for introducing hot air from a gas burner into a plurality of ducts leading to an exhaust pipe and indirectly heating the inside of the refrigerator with the hot air from the duct, wherein the cooking device has a horizontal direction. one that has an axis of rotation and the outer periphery is provided with a fan to a circular, the exhaust pipe and the gas burner is arranged on the same side Rutotomoni, discharge this burner
Cylinders can only rotate once per fan
Pipes with a lengthwise gap between them
Connected by multiple ducts, and each duct
Turning into a substantially U-shape along the outer peripheral shape of the fan
And an arc-shaped case that absorbs longitudinal elongation due to thermal expansion
A heating cooker characterized by being provided as a hook. 2. A structure in which at least one end of a portion where both ends of the duct are connected to the gas burner and the exhaust pipe is configured to allow displacement in the length direction of the duct. The cooking device according to claim 1, wherein