JP3671168B2 - Food cooking equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a food cooking device using superheated steam.
[0002]
[Prior art]
In recent years, cooking machines using superheated steam have been in the limelight, but the conventional cooking machine has such a configuration as a cooking room for cooking food and a cooking room for electric heaters, etc. inside the cooking machine body. A device that includes an internal heating unit and includes a saturated steam generation unit and a superheated steam generation unit outside the cooker body is known. And each pipe | tube (guidance | derivation means) for vapor | steam which connects these each component apparatus is needed.
[0003]
[Problems to be solved by the invention]
Conventional cooking machines require a cooking machine body, saturated steam generation means, superheated steam generation means, and independent heating sources (heaters), and further, heat is radiated in the piping connecting them, resulting in large energy loss. There are drawbacks of poor efficiency and a long cooking time. In addition, each of these component devices has a drawback that a heat insulation means is required, and the component devices are large and the installation space of the entire apparatus becomes large.
[0004]
Therefore, an object of the present invention is to provide a food cooking apparatus that is compact and has little energy loss, and that can cook food in a short time.
[0005]
[Means for Solving the Problems]
In order to achieve the above-described object, a food cooking device according to the present invention includes a cooking main body that cooks food and a saturated steam that is disposed outside the cooking main body to generate the saturated steam. Saturated steam supply means for supplying steam, and the cooking main body has a cooking chamber for storing and cooking food, and a meandering flow path, meandering saturated steam from the saturated steam supply means And a superheated steam generating means for generating superheated steam in the flow path while passing through the channel, and the superheated steam generating means is disposed in the upper part and / or the lower part of the cooking chamber. The superheated steam generated by the superheated steam generating means is discharged into the cooking chamber , and the superheated steam generating means has a meandering pipe body and a gap between the inner peripheral surface of the meandering pipe body. A rod-shaped electric heater, and the rod-shaped electric heater The outer peripheral surface spiral fins are formed of, in which the saturated vapor in the gap is configured to generate the superheated steam is heated while flowing induced in the fin.
[0006]
A cooking main body for cooking food; and saturated steam supply means disposed outside the cooking main body for generating saturated steam and supplying the saturated steam to the cooking main body. The main body has a cooking chamber for storing and cooking food, and a meandering channel, and the saturated steam from the saturated steam supply means is heated while passing through the meandering channel and is heated in the channel. And a superheated steam generating means for generating superheated steam in the cooking chamber, wherein the superheated steam generating means is disposed at an upper part and / or a lower part of the cooking chamber, and the superheated steam generated by the superheated steam generating means is cooked. The superheated steam generating means has a steam generating block body in which a meandering flow path is formed, and an electric heater built in the steam generating block body, and the electric heater vapor generated by heating the steam generation block body It is obtained by configured to generate the superheated steam from the saturated steam in the formed lock body the serpentine flow path.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on the illustrated embodiment.
[0008]
FIG. 1 is a block diagram showing an embodiment of the food cooking device of the present invention, and FIG. 2 is a block diagram showing another embodiment of the food cooking device of the present invention. These cooking apparatuses include a cooking main body 41 that cooks the food F, and saturated steam supply means 10 that generates saturated steam T and supplies the saturated steam T to the cooking main body 41. The cooking body 41 includes a cooking chamber 1 for cooking (baking) the food F, and superheated steam generation means 2 for heating the saturated steam T supplied from the saturated steam supply means 10 to generate superheated steam U. ing.
And the superheated steam production | generation means 2 is arrange | positioned in the upper part and the lower part in the cooking chamber 1, or any one, discharge | releases the superheated steam U produced | generated by the superheated steam production | generation means 2 in the cooking chamber 1, and a cooking chamber. 1 is configured to cook food F.
[0009]
First, the food cooking device of FIG. 1 will be described. This cooking device includes a cooking chamber 1 in which the food F is stored and cooked, and a reticulated cooking tray 11 on which the food F is placed and which can be taken in and out of the cooking chamber 1. I have. The cooking chamber 1 in FIG. 1 is a cooking space (cooker) whose upper and lower surfaces, both side surfaces, and the rear surface are closed and whose front surface can be opened and closed by a door 28. And the superheated steam production | generation means 2 which heats the saturated steam T and produces | generates the superheated steam U is arrange | positioned inside the cooking chamber 1 (upper part and / or lower part). Moreover, you may comprise the superheated steam production | generation means 2 so that it may become the upper surface and lower surface of the cooking chamber 1 by comprising the superheated steam production | generation means 2 in panel shape.
[0010]
Then, the superheated steam U generated by the superheated steam generation means 2 on the upper and lower surfaces of the cooking chamber 1 is released into the cooking chamber 1. Since the net-like cooking tray 11 is a freely drawable tray having a large number of holes, in the cooking chamber 1, heat from the superheated steam U and the electric heater of the superheated steam generation means 2 described later is transmitted from below the tray 11, Food can also be cooked from the bottom side. Therefore, the superheated steam U of the superheated steam generating means 2 and the direct heat generated by the heater are not affected by the placement position, size, and shape of the food F on the tray 11 by radiant heat and convection heat. Can cook evenly on the front and back.
[0011]
The saturated steam supply means 10 will be described. It has a steam generating can body (boiler body) 15, a water supply tank 16, and a guiding means 29, generates saturated steam T from water W, and superheats the saturated steam T It conveys to the steam generation means 2. More specifically, water W is supplied from a water supply source to a water supply tank 16 through a water supply electromagnetic valve 17, and water W is supplied to a steam generating can 15 by a pump P through a heat exchanger 18 described later. Then, water is heated by the steam generating heater 19 to generate saturated steam T, which is guided to the guiding means 29.
[0012]
The water supply tank 16 has a full water level detection sensor 20 and a low water level detection sensor 21, and the steam generating can body 15 includes a control pressure switch 22, a pressure safety valve 23, a water level sensor 24, a waste water temperature measurement sensor 25, and A drain valve 26 is provided. Further, a check valve 27 is installed between the heat exchanger 18 and the water supply tank 16 to prevent backflow (safety). The guiding means 29 includes a pipe that conveys the saturated steam T, a valve (solenoid valve) 30 that supplies / stops the saturated steam T, and an upper superheated steam generating means 2 in the cooking chamber 1 that is piped downstream of the valve 30. A branching portion 31 for distributing the saturated steam T to the lower superheated steam generating means 2 and flow rate adjusting valves 32 and 32 on the downstream side thereof are provided. The flow rate adjustment valve 32 can be fully closed and can be controlled to supply the saturated steam T only to either the upper / lower superheated steam generation means 2 or 2 of the cooking chamber 1.
[0013]
Thus, in order to adjust the flow (flow rate) of the saturated steam T before it is heated to the superheated steam U, the guide means 29 can be a normal standard product. In addition, a pressure switch 33 for detecting abnormal pressure is provided in the vicinity of the outlet of the steam generating can body 15.
[0014]
The heat exchanger 18 uses the surplus heat of the generated saturated steam T and / or superheated steam U to perform heat exchange via a pipe (not shown) and assists in generating water W into the saturated steam T. It is composed. Thus, when water is supplied to the steam generating can body 15, the supplied water W does not reduce the temperature in the steam generating can body 15 and the pressure of the saturated steam T, and the steam generating heater 19 The required amount of heat (power consumption) is reduced and energy can be saved.
[0015]
Next, the food cooking apparatus of FIG. 2 will be described. This cooking apparatus passes through the cooking chamber 1 from the upstream loading section 13 to the downstream unloading section 14 and the cooking chamber 1 for cooking the food F. Food conveying means 12 to be provided. The cooking chamber 1 in FIG. 2 is a cooking zone in which the upper and lower surfaces and both side surfaces are closed, and the front and rear surfaces can be opened and closed by an automatic door (not shown) or is always open. And the food conveyance means 12 is a conveyance path which makes the front-back direction of the cooking chamber 1 the running direction (longitudinal direction), the running surface is inserted into the cooking chamber 1, and is longer than the front-back dimension of the cooking chamber 1, for example, a belt A conveyor or a roller conveyor having a plurality of rollers arranged in parallel is used. The upstream end (the left side in FIG. 2) of the food conveying means 12 becomes the upstream carry-in part 13, and the downstream end (the right side in FIG. 2) across the cooking chamber 1 is the downstream carry-out part 14. Become.
[0016]
And the superheated steam production | generation means 2 which heats the saturated steam T and produces | generates the superheated steam U is arrange | positioned inside the cooking chamber 1 (upper part and / or lower part). Moreover, you may comprise the superheated steam production | generation means 2 so that it may become the upper surface and lower surface of the cooking chamber 1 by comprising the superheated steam production | generation means 2 in panel shape. Further, when the food conveying means 12 is a belt conveyor type, the belt is preferably in the form of a mesh, and the superheated steam generating means 2 is disposed between the upper and lower belts as shown in FIG. good.
2 has the saturated steam supply means 10 (guidance means 29), the description thereof is omitted because it is the same as FIG. 1 (and the figure is simplified).
[0017]
Then, the food F placed on the food conveyance means 12 in the carry-in section 13 is generated by the superheated steam generation means 2 on the upper surface side and the lower surface side of the cooking chamber 1 while being conveyed downstream so as to pass through the cooking chamber 1. The heated superheated steam U is discharged into the cooking chamber 1 to perform cooking, and the food F cooked in the carry-out unit 14 is automatically taken out. Note that the conveyance by the food conveying means 12 can be performed either continuously or intermittently. Thereby, the food F placed on the food conveying means 12 in front of the cooking main body 41 is automatically and sequentially placed on the cooking main body 41 by the radiation and convection of heat by the superheated steam generating means 2. Can be cooked evenly on the front and back without being affected by position, size, shape, and quantity.
[0018]
FIG. 3 is a partial sectional plan view of the superheated steam generating means 2. The superheated steam generating means 2 includes a meandering pipe body 3 and a rod-like electric heater 4 that is internally provided with a gap S between the inner peripheral surface 3 a of the meandering pipe body 3. The meandering pipe body 3 is composed of a plurality of straight pipes 34 arranged side by side in the same plane and a plurality of short pipes 35 connecting ends of the pipes 34 arranged side by side. The continuation (one line) of the meandering pipeline 36 is formed. 1 and 2 is supplied to a supply portion (one end portion) 38 which is the starting end of the meandering conduit 36 in FIG. 3, and reaches the superheated steam U in the gap S. Heated, the superheated steam U passes through the terminal discharge part (other end part) 8, and the superheated steam U is discharged into the cooking chamber 1 by the steam discharge means 39 described later.
[0019]
The rod-shaped electric heater 4 that generates heat when energized from the power supply side (not shown) has a rod shape with an outer diameter smaller than the inner diameter of the straight pipe 34 (meandering conduit 36). It is inserted in each.
Further, the meandering pipe body 3 itself has an action of an electric heater in the cooking chamber 1. That is, the superheated steam generation means 2 generates the superheated steam U and cooks the food F by the radiation and convection action of the superheated steam U, and at the same time heats the food F by the heat generated by the rod-shaped electric heater 4 by electric energy and further cooks it. It functions to preheat and keep the room warm. Therefore, the total power heater capacity is small.
[0020]
As shown in FIG. 3, the rod-shaped electric heater 4 has spiral fins 37 formed on the outer peripheral surface, and steam is guided to the fins 37 in the gap S of the meandering pipe 36 and flows spirally. The steam passage distance is increased, and the thermal efficiency of the rod-shaped electric heater 4 is improved. In FIG. 3, the display of the fins 37 in the middle of the heater 4 is omitted.
Accordingly, the pipe 36 of the superheated steam generating means 2 is meandered, and the above-described fins 37 help the superheated steam generating means 2 to be able to extend the steam passage distance while being compact, and is extremely heat efficient. Can be. Thereby, this superheated steam production | generation means 2 can be accommodated in the cooking chamber 1 compactly, without reducing a superheated steam production | generation function.
[0021]
FIG. 4 is a plan view showing another embodiment of the superheated steam generating means 2, and this superheated steam generating means 2 includes a steam generating block body 5 in which a meandering channel 6 is formed, and a steam generating block body. 5 and an electric heater 7 installed in the interior. The steam generation block body 5 is composed of a metal block having a particularly small specific heat and good thermal conductivity, and a continuous (one strip) meandering flow path 6 is formed inside the block. The meandering flow path 6 is a closed flow path except for its start and end, and the saturated steam T that has passed through the guiding means 29 in FIGS. 1 and 2 is the starting point of the meandering flow path 6 in FIG. Is supplied to a supply portion (one end portion) 38, and the steam generating block body 5 is heated by the electric heater 7 to generate superheated steam U from the saturated steam T in the meandering flow path 6, and the superheated steam U is terminated. After passing through the discharge part (other end part) 8, superheated steam U is discharged into the cooking chamber 1 by the steam discharge means 39 described later.
[0022]
Further, the electric heater 7 that generates heat when energized from the power supply side (not shown) is inserted into the steam generation block body 5 and is not limited to a rod shape as shown in FIG. There may be.
Further, the steam generation block body 5 has an action of an electric heater in the cooking chamber 1. That is, the superheated steam generation means 2 generates the superheated steam U and cooks the food F by the radiation and convection action of the superheated steam U. At the same time, the superheated steam generation means 2 heats the food F by the heat generated by the heater 7 by electric energy. It has the function of preheating and keeping warm. Therefore, the total power heater capacity is small.
Thus, since the flow path 6 of the superheated steam generation means 2 has a meandering shape, the superheated steam generation means 2 can be made to have a long steam passage distance and extremely high thermal efficiency while being compact. Thereby, this superheated steam production | generation means 2 can be accommodated in the cooking chamber 1 compactly, without reducing a superheated steam production | generation function.
[0023]
Further, as shown in FIGS. 3 and 4, the superheated steam generation means 2 includes a temperature sensor 9 in the vicinity of the discharge portion 8 of the superheated steam U. 3 is connected to the wall of the pipe 34 in FIG. 3 and to the wall of the steam generation block 5 in FIG.
In FIG. 3, the temperature sensor 9 detects the temperature of the superheated steam U at the discharge portion 8 which is the end of the meandering pipe body 3, controls the ON / OFF of the rod-shaped electric heater 4, and discharges it to the cooking chamber 1. The temperature of the superheated steam U can be adjusted. Further, even when the discharge of the superheated steam U to the cooking chamber 1 is stopped, the bar-shaped electric heater 4 can be prevented from being overheated.
In FIG. 4, the temperature sensor 9 detects the temperature of the superheated steam U in the discharge part 8 which is the termination | terminus of the meandering flow path 6 of the steam production | generation block body 5, controls ON / OFF of the electric heater 7, and cooks The temperature of the superheated steam U discharged to the chamber 1 can be adjusted. Furthermore, even when the discharge of the superheated steam U to the cooking chamber 1 is stopped, the electric heater 7 can be prevented from being overheated.
[0024]
Next, as shown in the bottom view of the steam discharge means 39 in FIGS. 1, 2, and 5, the steam discharge means 39 included in the superheated steam generation means 2 is connected to the discharge portion 8 of the superheated steam generation means 2 with a connecting pipe 42. Are connected to each other, and have a ring-shaped tube body (discharge tube) 40 that discharges the superheated steam U generated by the superheated steam generation means 2 into the cooking chamber 1, and the tube body 40 meanders. The pipe-like body 3 (steam generation block body 5) is configured to face. A large number of jet outlets (nozzle portions) 43 are formed on the surface of the pipe body 40 of the vapor discharge means 39 to discharge the superheated steam U.
The ejection direction of the ejection port 43 may be a direction in which the superheated steam U is directly applied to the food F, a direction in which the superheated steam U is not applied directly, or a mixture thereof. In other words, the discharge direction of the superheated steam U may be set to a horizontal direction or a diagonally downward direction so that the convection effect can be further exerted.
[0025]
And according to the food cooking apparatus of this invention, cooking time becomes short, and also the surface of a foodstuff does not oxidize, it looks good even if it passes after cooking, and food can be baked deliciously.
[0026]
In FIG. 2, the food conveying means 12 is a conveying path longer than the dimension in the front-rear direction of the cooking chamber 1. You may arrange | position a conveyance path inside the cooking chamber 1. FIG. That is, the inside of the cooking chamber 1 is a vertically long cooking zone, and the food F is automatically conveyed from the upstream side to the downstream side for cooking.
[0027]
【The invention's effect】
The present invention has the following effects by the above-described configuration.
[0028]
(According to claims 1 and 2 ) It is not necessary to separately provide a place for installing the superheated steam generation means 2, space saving can be realized, and further, heat is radiated from the superheated steam generation means 2, which has conventionally been a loss. Heat can be used effectively into the cooking chamber 1 and the thermal efficiency can be improved. For example, the food F can be heated by this heat, or the cooking chamber 1 can be preheated and kept warm. In addition, it is possible to reduce the number of steam pipes connecting the constituent devices, simplify the equipment, and as a result, eliminate losses due to heat radiation from the pipes, thereby further contributing to energy saving.
While the superheated steam generating means 2 is compact, the steam passage distance can be increased and the thermal efficiency can be made extremely good.
Since the food F is cooked by the radiation and convection of heat by the superheated steam U, cooking can be performed in a short time, and the food F is wrapped in the superheated steam U and baked, so that the appearance is beautiful and delicious .
[0029]
Furthermore, while the superheated steam generating means 2 is compact, the steam passage length can be increased, the heat efficiency can be made extremely high , and the superheated steam generating means can be added to the cooking chamber 1 without deteriorating the superheated steam generating function. 2 can be stored in a space-saving manner. Since the superheated steam generating means 2 has a function of heating the food F by the heat generated by the heater and preheating / keeping the cooking chamber simultaneously with the generation of the superheated steam U, energy can be effectively used. Moreover, since the production | generation of the superheated steam U and the heating in the cooking chamber 1 are performed by the same superheated steam production | generation means 2, a temperature management means can be made common and control becomes easy.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an embodiment of a food cooking apparatus according to the present invention.
FIG. 2 is a configuration diagram showing another embodiment of the food cooking device of the present invention.
FIG. 3 is a partial cross-sectional plan view of superheated steam generation means.
FIG. 4 is a plan view showing another embodiment of the superheated steam generating means.
FIG. 5 is a bottom view of the vapor discharge means.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cooking chamber 2 Superheated steam production | generation means 3 Meandering pipe body 3a Inner peripheral surface 4 Bar-shaped electric heater 5 Steam generation block body 6 Meandering flow path 7 Electric heater
11 Mesh cooking tray
12 Food transport means
13 Upstream loading section
14 Downstream side unloading section
37 Fin F Food S Clearance T Saturated steam U Superheated steam

Claims (2)

A cooking main body (41) for cooking food (F) and a saturated steam (T) disposed outside the cooking main body (41) to generate the saturated steam (T) to the cooking main body (41) ), And the cooking body (41) has a cooking chamber (1) for storing and cooking food (F), and a serpentine channel. Then, the saturated steam (T) from the saturated steam supply means (10) is heated while passing through the meandering flow path to generate superheated steam (U) in the flow path (2) The superheated steam (U) generated by the superheated steam generating means (2) is provided in the upper and / or lower part of the cooking chamber (1). were to be released into the cooking chamber (1) in said superheated steam generating means (2), serpentine pipe body (3), the inner peripheral surface of the meandering rows pipe (3) 3a) and the gap (rod-shaped electric heater (4 that are equipped to have an S)), having a helical fin (37 on the outer peripheral surface of the rod-shaped electric heater (4)) is formed, said gap ( The food cooking apparatus , wherein the saturated steam (T) is heated while being induced to flow through the fins ( 37 ) in S) to generate the superheated steam (U) . A cooking main body (41) for cooking food (F) and a saturated steam (T) disposed outside the cooking main body (41) to generate the saturated steam (T) to the cooking main body (41) ) and saturated steam supply means (10) for supplying, comprises a, the cooking body (41), food (F) cooking chamber to cook accommodating the (1), have a flow path of the snake rows Then, the saturated steam (T) from the saturated steam supply means (10) is heated while passing through the meandering flow path to generate superheated steam (U) in the flow path (2) The superheated steam (U) generated by the superheated steam generating means (2) is provided in the upper and / or lower part of the cooking chamber (1). were to be released into the cooking chamber (1) in said superheated steam generating means (2), serpentine path (6) steam is formed generation block body (5) An electric heater (7) installed in the steam generation block body (5), and the steam generation block body (5) by heating the steam generation block body (5) with the electric heater (7). A food cooking apparatus configured to generate the superheated steam (U) from the saturated steam (T) in the meandering flow path (6) formed in the above .

Images