JPH1114059A - Gas heater and adjustment of thermal power - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the adjustment of thermal power to a body to be heated by making a gas burner freely liftable with a lifter thus enabling setting of a given distance between the gas burner and the body to be heated. SOLUTION: A lifter 3 is connected to a gas combustor body such as a large-sized Bunsen burner for city gas use by way of connecting members 4. The burner is constructed by integrally connecting three annular gas burners 2a which differ in diameter by means of a plurality of metallic support ribs 2b which are disposed below the gas burners 2a. Due to such a construction, the gas burner 2 is freely elevatable by an expanding and shrinking movement of the lifter 3 and can be fixed at a given position. The gas burners 2a which has a triplicate construction are respectively connected with city gas distribution pipes 2a2 by way of mixing pipes 2a3 which respectively introduce air. As the lifter 3, a commercially available jack can be used. The jack is constructed such that a pair of cruciform parallel links 3d, 3e are tilted by a hydraulic unit 3h so as to elevate a table 3b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a gas heating apparatus and a thermal power control method.

[0002]

2. Description of the Related Art A conventionally known gas heater has a body to be heated installed at a predetermined distance above a gas burner. To adjust the heating power to the body to be heated, it is necessary to open and close a burner cock. Had been adjusted.

[0003]

However, in the above-mentioned conventional fixed-type gas heater, for example, in the case of a cooking gas heater, a large-sized gas heater used in a food processing factory or a Chinese restaurant is used. For example, when cooking large quantities of ingredients with a large-diameter Bunsen burner, there is no problem if heating with strong heat, but especially when heating with low heat or toro fire by squeezing the burner cock, from the burner cock Since the gas supply power tends to be weaker as the distance increases, the thermal power on the far side is lower than that on the near side. Therefore, it is often observed that the entire heated body cannot be heated with a uniform heating power, and as a result, it is difficult to perform uniform heating and cooking. In addition, especially when adjusting to a toro fire, the flame farthest from the burner cock was extinguished and there was often a danger of generating raw gas. This phenomenon is often seen in small household appliances. As described above, in the conventional fixed gas heater, the control of the thermal power by squeezing the burner cock was not performed well, and there was a drawback involving danger. Accordingly, it is desired to develop a gas heating apparatus which can solve the above-mentioned disadvantages of the conventional gas heater and can adjust the heating power to the object to be heated as desired by a stable flame.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned disadvantages of the prior art and to provide a gas heating apparatus which satisfies the above-mentioned demands, wherein a gas burner is connected to an elevating device. And Further, the present invention provides a thermal power control method using the above-described gas heating device, wherein the elevating device raises and lowers the gas burner and sets a desired distance to the object to be heated. It is characterized in that the heating power is adjusted.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a gas heating apparatus according to the present invention, a Bunsen burner or the like is generally used as a gas burner.
The lifting device is directly connected to the lower surface of the gas burner with or without a connecting member by welding, bolts, nuts, etc. As the lifting device, a commercially available electric or manual jack is generally used. General and preferred. The jack may be any of a hydraulic jack, a screw jack, a rack-onion jack and the like. Further, a piston cylinder device using pneumatic pressure may be used. The object to be heated by the gas heating device is a steel pot or container containing the food material to be subjected to the heat treatment, for example, when performing heat treatment, roasting, and steaming of various food materials, for example, Heating and melting of metals or alloys in the chemical industry; heat treatment of various mixtures or solutions;

Next, an embodiment shown in the accompanying drawings will be described in detail. In the drawings, reference numeral 1 denotes a gas heating device. The gas heating device 1 includes a gas burner 2 as a gas combustor main body, for example, a large Bunsen gas burner 2 for city gas, and a lower part of the gas burner 2 connected to the gas burner 2 via a connecting member 4. And the elevating device 3.
Thus, the gas burner 2 can be raised and lowered by the expansion and contraction of the lifting device 3 and can be stopped at a desired position. In the illustrated example, the gas burner 2 includes a plurality of metal support bars 2b, three annular gas burners 2a, 2a, 2a having different diameters arranged at equal intervals on the lower surface thereof.
Are formed integrally by welding, and the lower surface of each annular gas burner 2a of the gas burner 2 and the upper surface of the lifting / lowering device 3 thereunder are formed by a plurality of metal connecting members 4 extending in the vertical direction. , 4,... Are connected to each other by welding. Each annular gas panner 2a is formed by screwing and connecting a flame port pipe 2a1 to a screw hole of each flame port disposed at regular intervals on the upper surface of an annular steel pipe, and is suitable for mass cooking. It is a large Bunsen burner. The triple annular gas burners 2a, 2a, 2a thus arranged are common
The city gas supply pipe 2a2 is connected via mixing pipes 2a3, 2a3, 2a3 into which respective air flows.
A flexible tube 5 is connected to an outer end of the supply pipe 2a2, and an outer end of the flexible tube 5 is connected to a gas main pipe through a main plug (not shown). Each mixing pipe 2a3 has a burner cock 6 and an air inflow control port 7 interposed. Thus, the flexible tube 5 allows the gas burner 2 due to expansion and contraction of the elevating device 3, that is, the burner 2 a, 2 a, 2 a together with the respective mixing pipes 2 a 3, 2 a 3, 2 a 3 and one common gas supply pipe 2 a 2. It is allowed to be able to move up and down freely.

As the lifting device 3, a commercially available jack can be used, which is convenient. In the illustrated example, the jack 3
Is placed on the floor surface A, and as the jack 3 expands and contracts,
The burner 2 can be moved up and down freely. As jack 3
Any of a hydraulic jack, a screw jack, a rack-onion jack and the like may be used, but in the illustrated example, a pantograph-type hydraulic jack was used. It should be noted that it is optional to use a lifting device using air pressure instead of hydraulic pressure.

The illustrated hydraulic jack 3 itself is a well-known commercially available one and can be easily obtained. The jack 3 has a base 3a and a table 3b of a required size, a parallel link 3d, 3e composed of a pair of left and right X-shaped arms connected by a center pin 3c crossing the center, and an X composed of a pair of these left and right. A hydraulic piston / cylinder 3h has an upper end connected to a horizontal shaft 3f connecting the parallel links 3d and 3e, and a lower end slidably connected to a sliding roller 3g. In the drawing, 3i is a fixing pin for supporting the rear end of the X-shaped arm of each parallel link 3d, 3e, 3j, 3j is connected to the front end of the X-shaped arm of each parallel link, and slides between the base 3a and the table 3b. A sliding roller 3k that slides in the moving groove in the front-rear direction indicates a hydraulic unit that drives the hydraulic piston / cylinder 3h. Since the configuration of the hydraulic jack 3 is well known, further description will be omitted. Thus, the hydraulic jack 3 is moved by the hydraulic unit 3h to the pair of left and right X-shaped parallel links 3.
d and 3e are extended and contracted, and accordingly, the table 3 is displayed in a pantograph manner as shown by a solid line and a virtual line.
b is moved up and down freely. 8 is the hydraulic unit 3
The operation switch for driving the forward / reverse movable motor of h is, as shown in the figure, a desired support 9 of a plurality of supports 9a, 9a,.
It is convenient to provide it at an appropriate height of a. The operation switch 8 includes an up button 8a and a down button 8b. Although not shown, a foot-operated switch provided with a limit switch may be placed on the floor as the operation switch 8 and operated by an operator's foot.

In the illustrated gas heating apparatus 1, a container 10 such as an iron pot is provided above a gas burner 2 for heating a food material to be processed. 2) is used to heat and cook a body to be heated, which contains a large number of items. The container 10
The bearings 12 and 12 are provided on the intermediate columns 9a and 9a of the three columns disposed on the left and right sides of the supporting machine frame 9, respectively.
The inner ends of the support shafts 11, 11 rotatably supported through the base are welded to the left and right side surfaces of the outer periphery of the container 10 to support the container 10 so that the container 10 can rotate and tilt freely.
Is connected to a driving device (not shown) such as a driving motor and a piston / cylinder. After the heating and cooking are completed, the driving device rotates the support shaft 11 to rotate and tilt the container 10, and the external The contents could be opened in the receiver. In the illustrated embodiment, the outer periphery of the gas burner 2 is protected by a protective case 13 made of a heat insulating material having a large opening 13a on one side on the gas supply side. The protective case 13 is provided with the surrounding substrate 1.
At 3b, it is bound by bolts and nuts on a shelf 14 supported by the right and left columns 9a, 9a of the supporting machine frame 9.

Next, the operation of the gas heating apparatus 1 according to the present invention will be described. First, when the operator presses the up button 8a of the operation switch 8 by hand, the hydraulic jack 3 is driven, and the parallel links 3d and 3e start to extend. The connected gas burner 2 starts to rise. Thus, when the pressing of the up button 8a is stopped, the gas burners 2, 2, 2 stop rising at that point, and stop at that position. When the downward movement button 8b is pressed, the parallel links 3d and 3e start to contract, and accordingly, the gas burner 2 descends. Thus, when the pressing of the lowering button 8a is stopped, the lowering of the gas burner is stopped at that point, and the gas burner is stopped at that position. Thus, according to the present invention, the expansion and contraction of the jack 3 causes the gas burner 2
Is stopped at its desired position so as to be able to move up and down freely, and the gas burner is set to a desired distance from the bottom of the container 10 above the gas burner.
The object to be heated can be heated by adjusting to a desired heating power such as a low heat or a toro fire. The state shown in the figure indicates that the gas burner 2 shown by a solid line is in a state where the hydraulic jack 3 is at its highest position, and therefore, is located at the highest position closest to the container 10. Has shrunk the most,
Therefore, it shows a state located at the lowest position farthest from the cooking container 3.

In a conventional fixed-type gas heater, in order to heat an object to be heated with a low heat or a toro fire, it is necessary to narrow the burner cock and reduce the flame of the gas burner. Since it falls, it is not possible to heat the object to be heated with uniform heating power,
In the case of cooking by heating, there is a disadvantage that the product does not rise well, and furthermore, there is a risk that the flame goes out and raw gas is generated. According to the above-described gas heating device 1 of the present invention, for example, after the gas burner 2 is heated and cooked at the uppermost position by a high heat, when it is necessary to heat the gas burner 2 by a low heat or a toro fire, the burner cocks 7, 7,. Without squeezing 7, each annular gas burner 2a, 2a, 2a
The jack 3 is shrunk while the flames on the side close to the burner cocks 7, 7, 7 and the flames on the far side are the same size and maintain a stable flame that does not extinguish. It is lowered to a position where a low heat or a toro fire for the object to be heated can be obtained. Thus, the entire bottom surface of the cooking vessel 3 can be uniformly heated for a desired time with a low heat or a toro fire by the flame of the gas burners 2a, 2a, 2a in the stable combustion state, and the burner cock is squeezed as in the above-described conventional case. The food in the container 10 can be cooked by uniform heating for a long time without inconvenience of uneven heating and danger of flame extinguishment caused when heating is performed for a long time as low heat or toro fire.

When the distance (interval) of the gas burner 2 from the bottom of the container 10 is the highest position when the flame contacts the bottom surface of the container 10, the lowest position is about 100 to 100 mm from the bottom surface of the container 10. If the position is about 150 mm away, the range from high heat to toro fire can be adjusted appropriately. Although not shown, it is preferable to attach a vertically graduated scale to the supporting machine frame 9 so that the distance from the bottom surface of the container 10 to the top surface of the gas burner 2 can be read. .

Although not shown, a temperature sensor is attached to the container 10 so that when the temperature rises to a predetermined temperature,
The hydraulic unit 3h is driven by a computer control device connected thereto, and the jack 3
With a control device that automatically controls the gas burner 2 to move down or up to a predetermined position to heat it with a desired heat such as a predetermined low heat, a toro fire, and a high heat. Is also good.

In the illustrated embodiment, a pantograph type jack is used as the elevating device 3, but a hoist type jack used for car repair, a jack of a vertical type carrier, etc. can be diverted. Needless to say, a manual type may be used in which the handle protruding from the jack is operated to operate the lifting and lowering.

The gas burner can be moved up and down by the operation of the elevating device even if the gas burner is connected to the main valve of the gas via a universal joint instead of the flexible tube.

[0016]

As described above, according to the present invention, since the gas burner can be moved up and down by a lifting device such as a jack, the distance between the gas burner and the object to be heated disposed above the gas burner is adjusted to a desired position. Thus, it is possible to heat the object to be heated with a predetermined uniform and stable flame by appropriately adjusting the heating power to the object to be heated. In particular, when it is necessary to heat with a low heat or toro fire, simply lower the gas burner to a suitable position without squeezing the gas cock, and a safe and good combustion state will be uniform with the low heat or toro fire for the object to be heated. Heat treatment is performed, and the above-mentioned disadvantages caused by squeezing the conventional gas cock can be solved.

[Brief description of the drawings]

FIG. 1 is a cutaway view of an example of a gas cooking device according to the present invention.

FIG. 2 is a side view of the gas cooking device of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Gas heating device 2 Burner 3
Lifting device, jack 4 connecting member 10 container

Claims (2)

[Claims] 1. A gas heating device, wherein a gas burner is connected to a lifting device. 2. A heating power control method comprising: raising and lowering the gas burner by the lifting device to set a desired distance to the object to be heated, thereby adjusting the heating power to the object to be heated.