JP4444992B2 - grill - Google Patents

Description

  The present invention relates to a grill used for cooking such as grilled fish and gratin, and more particularly to a grill provided with an afterburner for burning and eliminating smoke generated from foods and odor components contained therein.

  In grills for cooking pottery such as grilled fish and skewers, smoke generated from ingredients is discharged from the grill cabinet into the kitchen through the exhaust passage. Therefore, there are inconveniences that smoke and cooking odors diffuse into the kitchen, and that unburned oil in the smoke adheres to the wall surface of the exhaust passage of the grill and the wall surface of the kitchen.

  In order to prevent the inconvenience, various proposals have been made in which an afterburner having a smoke purification function that burns and disappears smoke and odorous components generated from foods is disposed in the exhaust passage (Reference 1, Reference 2).

FIG. 5 is a cross-sectional view of the grill disclosed in Patent Document 1. As shown in FIG.
An upper fire burner (11) and a lower fire burner (12), which are grill burners, are disposed on the ceiling of the grill cabinet (1) and the lower side thereof, and the back of the grill cabinet (1) is exposed to the atmosphere. An open exhaust passage (13) is provided continuously.

  In the exhaust passage (13), an afterburner (14) having a smoke purification function that burns and eliminates smoke and odorous components contained therein is activated, and the smoke activated and heated by the afterburner (14) is oxidized. In addition, a catalyst filter (15) for further smokeless and bromide is provided.

In addition, a cooking start switch (16) that is operated when cooking is started on the front surface of the grill, and a mode selection for selecting a smoke purification mode using an afterburner (14) and an energy saving mode not using this. A switch (17) is provided. Further, an afterburner dedicated switch (18) for performing a point fire extinguishing operation of the afterburner (14) independently of the cooking start switch (16) is provided.
In this case, when the smoke purification mode is selected with the mode selection switch (17) when the cooking start switch (16) is operated, the afterburner (14) and the upper and lower fire burners (11) (12) are burned together, Smoke generated from the food (F) heated by the upper and lower fire burners (11) and (12) is reduced by baking with the afterburner (14), and the remaining smoke is oxidized by the catalytic filter (15) and further reduced. As a result, the smoke discharged from the exhaust passage (13) is smokeless and brominated.

On the other hand, if the energy saving mode is selected with the mode selection switch (17), the afterburner (14) is maintained in the fire extinguishing state to reduce gas consumption, and in this state, the upper and lower fire burners (11) (12) are By burning, heating suitable for cooking gratin and pizza that does not generate smoke is performed.
JP 2006-55186 A JP 2006-55185 A

  However, in the above conventional one, when cooking is performed in the energy saving mode, the afterburner (14) is maintained in a fire extinguishing state, so that the temperature in the exhaust passage (13) does not rise rapidly in the initial stage of cooking, Draft hardly occurs in the exhaust passage (13). For this reason, there is a problem in that during the initial cooking in the energy saving mode, smooth exhaust from the exhaust passage (13) cannot be performed, and combustion performance cannot be guaranteed.

The present invention has been made in view of such points,
“A grill cabinet with an exhaust passage open to the atmosphere,
A grill burner for heating ingredients in the grill,
Afterburner for purifying smoke to burn and disappear the smoke flowing through the exhaust passage,
In a grill having a mode selection means for selecting a smoke purification mode in which the after burner and the grill burner are burned together and an energy saving mode in which only the grill burner is burned.
Even when the energy saving mode is selected, it is an object to ensure smooth exhaust from the exhaust passage (13) at the beginning of cooking.

[Invention of Claim 1]
The solution means of the invention according to claim 1 for solving the above-mentioned problem is as follows:
“Ignition means for igniting the afterburner when the grill burner is ignited, regardless of whether the mode selection means is selected from the smoke purification mode and the energy saving mode;
Means for outputting an energy saving start signal for extinguishing the afterburner at a predetermined time after ignition of the afterburner,
When the afterburner is ignited in a state where the energy saving mode is selected by the mode selection means, the afterburner is extinguished in response to the energy saving start signal.
According to the solution means, even when the energy saving mode is selected by the mode selection means, the afterburner is ignited when the grill burner is ignited. Then, the afterburner burns until the energy saving start signal is output, so that the temperature in the exhaust passage rises quickly. Thereby, the draft in the exhaust passage becomes active in a short time, and smooth exhaust is ensured.

[Invention of Claim 2]
In the invention according to claim 1, in the case where “the predetermined time is when the smoke extinguishing timer for measuring the combustion time of the afterburner has expired”, the afterburner burns until the smoke extinguishing timer expires. As a result, the temperature in the exhaust passage rises rapidly.

[Invention of Claim 3]
In the invention according to claim 1 or 2,
“A catalyst filter for smoke oxidation that is activated by being heated by the afterburner is disposed in the exhaust passage”.
Even if the catalyst filter is provided, if the temperature of the catalyst filter is low at the beginning of cooking, the catalyst filter is not activated, and the effect of smokeless and non-bromating the exhaust gas is small. Therefore, when an odor component adheres and remains on the wall surface of the grill cabinet or the exhaust passage in the previous cooking, an unpleasant odor due to the odor component is released to the kitchen at the beginning of cooking.

  However, since the afterburner is ignited when the grill burner is ignited as described in the operation of the invention according to the first aspect, the catalyst filter is quickly heated by the afterburner at the beginning of cooking so that the temperature rises. It is activated quickly. Therefore, it is possible to avoid the inconvenience that the catalytic filter exhibits an active deodorizing action from the beginning of cooking and an unpleasant odor is released into the kitchen.

[Invention of Claim 4]
In the invention according to claims 1 to 3,
In the case of “having an afterburner stop switch for forcibly extinguishing the afterburner that is burning in the smoke purification mode”, a food that generates less smoke after the smoke purification mode is selected and heating cooking is started If it is found that, it is possible to extinguish the afterburner by operating the afterburner stop switch, thereby reducing the gas consumption and saving energy.

[Invention of Claim 5]
In the invention which concerns on Claims 1-4,
"A gas circuit that branches into the grill burner and the after burner;
A main gas valve provided in a gas circuit upstream from the branched portion;
A gas valve for an after burner provided in a gas circuit between the branching portion and the after burner;
A flame detector for monitoring the combustion state of the afterburner,
After applying a valve closing signal to the afterburner gas valve to extinguish the afterburner, if the flame detection signal from the flame detector does not disappear, the main gas valve is closed. it can.
If a failure occurs in which the afterburner gas valve is stuck open due to aging or the like, the afterburner does not extinguish even when a closing signal is applied to the afterburner gas valve. Therefore, in this case, since the flame detection signal from the flame detector that monitors the combustion state of the afterburner does not disappear, the main gas valve provided on the upstream side of the afterburner gas valve is closed. Thereby, the gas supply to the grill burner and the after burner is shut off, and a safe state can be secured.

The present invention has the following specific effects.
In the invention according to claim 1, even when the energy saving mode is selected by the mode selection means, the afterburner burns at the initial stage of cooking and the temperature in the exhaust passage rises rapidly. It becomes active in a short time, thereby ensuring smooth exhaust.

  In the invention which concerns on Claim 2, since the combustion time of an afterburner can be managed with a smoke-removal timer, control is easy.

  In the invention according to claim 3, as described above, the catalytic filter exhibits an active deodorizing action from the beginning of cooking. Therefore, even when odor components remain attached to the wall of the grill cabinet or the exhaust passage in the previous cooking, it is possible to avoid the disadvantage that an unpleasant odor is released to the kitchen at the beginning of cooking.

  In the invention according to claim 4, when it is found that the food is low in the amount of smoke generated after the start of cooking, the afterburner can be extinguished by operating the afterburner stop switch. As a result, gas consumption can be reduced to save energy.

  In the invention according to claim 5, as described above, when the afterburner gas valve is stuck in the open state due to aging or the like, the main gas valve provided in the upstream gas circuit is closed. Thus, the grill burner and the after burner can be extinguished and maintained in a safe state.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a perspective view of a drop-in stove that is mounted in a state of being dropped into an opening (K1) opened in a countertop (K) of a system kitchen. The drop-in stove is related to the present embodiment. The grill (G) is incorporated.

The stove burner (31) (32) (33) is located on the top plate (30) of the stove body (3), and the grill (G) open / close door ( 4) is provided.
The stove operation section (40) located on the right side of the open / close door (4) has a rotary stove knob (31A) that combines the fire extinguishing function and the thermal power adjustment function of the burner for the stove (31) (32) (33) ) (32A) (33A). The stove knobs (31A), (32A), and (33A) are repeatedly pushed in to fire the stove burners (31), (32), and (33), while rotating in a protruding state to rotate the stove. The burner (31) (32) (33) has a function to adjust the heating power.

  On the other hand, the grill operation part (41) formed on the left side of the open / close door (4) of the grill (G) has a rotary grille knob (42 ), A mode selection switch (43) for selecting a smoke purification mode and an energy saving mode, which will be described later, an afterburner stop switch (44) for forcibly extinguishing the afterburner (6), a power switch (45), and A smoke purification lamp (46) that is turned on when the smoke purification mode is executed is provided.

  The grille knob (42) is repeatedly pressed to fire the upper and lower fire burners (28), (26), and (26), which will be described later, while the upper and lower fire burners ( 28) (26) It has a function to adjust the heating power of (26).

  As shown in FIG. 2, the grill (G) has an open / close door (4) that opens and closes the front opening (20) of the grill cabinet (2), and is connected to the back surface of the open / close door (4). The grill pan (22) mounted on the pan mounting tray (21) is provided with a grill (23), and support legs (24) (25) are provided from the front and rear ends of the grill (23). It is drooping. Then, by inserting the support legs (24) and (25) into the insertion holes (not shown) of the outer peripheral flange (220) of the grill pan (22), the grill net (23) is lifted from the grill pan (22). Is maintained.

  The flame holes (260) and (260) of the pipe-shaped lower fire burners (26) and (26) arranged in the vicinity of the left and right side walls of the grill cabinet (2) are connected to the grill pan (22) and the grill (23). Thus, the space below the grill net (23) is heated by the lower fire burners (26) and (26).

  An upper fire burner (28) for heating the upper space of the grill (23) is arranged on the ceiling of the grill (2). The upper fire burner (28) and the lower fire burner (26) (26) corresponds to the “grill burner” which is a specific matter of the invention described above.

  An exhaust passage (35) whose downstream end is open to the atmosphere is connected to the back end of the grill cabinet (2). At the bottom of the bent portion from the horizontal region (350) to the inclined region (351) located on the upstream end side of the exhaust passage (35), an after burner (60) is disposed, and the inclined region (351) A catalyst filter (62) is disposed in the vicinity of the upper end. This catalyst filter (62) is a heat-resistant ceramic plate having a number of through holes, carrying an oxidation catalyst such as platinum, and is heated by an afterburner (60) provided upstream thereof to activate it. When the smoke passes through the catalytic filter (62), the smoke is oxidized and smokeless and brominated.

FIG. 3 is a schematic diagram of a gas circuit and a control circuit of the grille (G) according to the embodiment of the present invention.
The gas circuit (71) branches into a grill burner and an after burner (60) consisting of an upper fire burner (28) and a lower fire burner (26) (26), and the main gas is upstream of the branched portion (a). A valve (72) is provided. The gas circuit between the branching portion (a) and the afterburner (60) is provided with an afterburner gas valve (74). The main gas valve (72) and the afterburner gas valve (74) are controlled to be opened and closed by a control device (80) incorporating a microcomputer.

  The flame detectors (26a) (26a) (28a) (60a) and the ignition electrodes (26b) (26b) are located in the vicinity of the upper and lower fire burners (28) (26) (26) and the afterburner (60), respectively. ) (28b) (60b). The igniter (29) for driving the ignition electrode (26b) (26b) (28b) (60b) is operated by the control device (80) and output from the flame detector (26a) (26a) (28a) (60a). The flame detection signal is monitored by the control device (80).

  In addition, the control device (80) includes a grille knob (42), a mode selection switch (43), an afterburner stop switch (44), a power switch (45), and a stove knob (31A) (32A) (33A). An output is applied, and a smoke purification lamp (46) is connected.

  The microcomputer incorporated in the control device (80) stores a control program for the grill (G) having the contents shown in the flowchart of FIG. 4. Hereinafter, the operation of the grill (G) will be described in accordance with the flowchart of FIG. Will be explained.

  In step (ST1), when the ON operation of the mode selection switch (43), which is the mode selection means, can be confirmed, the mode determination flag F1 is set to “energy saving mode” in step (ST2), while the mode is selected in step (ST3). If it is confirmed that the selection switch (43) is turned off, the mode determination flag F1 is set to the “smoke purification mode” in step (ST4).

  On the other hand, when the ignition operation by the grille knob (42) is confirmed in step (ST5), the igniter (29) is turned on in step (ST6) and the ignition electrodes (26b) (26b) (28b) (60b ) Sparks are ignited on all burners (26), (26), (28), and (60), and the main gas valve (72) and the afterburner gas valve (74) are opened. The burners (26) (26) (28) (60) are ignited. Therefore, in the present embodiment, the functional unit of the microcomputer that executes step (ST6) corresponds to “ignition means for igniting the afterburner when the grill burner is ignited”, which is the above-described invention specifying means.

  Next, if it is confirmed in step (ST7) that all flame detectors (26a) (26a) (28a) (60a) output flame detection signals, all burners (26) (26) ( 28) It is judged that ignition to (60) was successful, and in such a case, the smoke purification lamp (46) is turned on in step (ST8).

  Next, a waiting time of 5 seconds is executed in step (ST9), thereby forcibly burning the afterburner (60) for 5 seconds. That is, regardless of whether the mode determination flag F1 is the “smoke purification mode” or the “energy saving mode”, the afterburner (60) is forcibly burned for 5 seconds. As a result, even in the case where the energy saving mode is selected, the temperature in the exhaust passage (35) rises quickly at the beginning of cooking, and the draft effect becomes active in a short time and smooth exhaust is performed. Secured. Therefore, in this embodiment, the functional unit of the microcomputer that executes the waiting for 5 seconds in step (ST9) corresponds to the “smoke extinguishing timer” which is the specific matter of the invention described above.

  Next, when it is determined in step (ST10) that the mode determination flag F1 is “energy saving mode”, in step (ST11) a command to close the afterburner gas valve (74) (“invention specifying means“ The “smoke purification lamp” (46) is turned off. Next, in step (ST12), the process waits until a valve closing confirmation time (for example, 10 seconds) of the afterburner gas valve (74) elapses. After that, if it is determined in step (ST13) that the flame detector (60a) for the afterburner (60) is detecting flame, it is determined that the afterburner gas valve (74) is fixed in the open state, In such a case, after notifying an error with a buzzer or a lamp (not shown) in step (ST14), the main gas valve (72) is closed in step (ST15), whereby the upper and lower fire burners (28) (26 ) (26) and afterburner (60) gas supply is stopped to extinguish them. In step (ST15), the control for closing the afterburner gas valve (74) is executed again.

  On the other hand, if it is determined in the above step (ST13) that the flame detector (60a) for the afterburner (60) does not output a flame detection signal, the afterburner gas valve (74) is normally closed. to decide. In such a case, the flame detector (26a) (26a) (28a) detects the misfire of the upper and lower fire burners (28) (26) (26), or the fire extinguishing operation is performed with the grille knob (42). Steps (ST16) and (ST17) are repeated until it is done. Then, in the event of a misfire when any of the flame detectors (26a), (26a) and (28a) no longer outputs a flame detection signal, the control branches to the above-described step (ST14) and an error is notified, and then step (ST15) To close the main gas valve (72) and the afterburner gas valve (74).

  When it is determined in the above-described step (ST10) that the mode determination flag F1 is not “energy saving mode” (in this case, the mode determination flag F1 is “smoke purification mode”), step (ST18 ) And all the flame detectors (26a) (26a) (28a) (60a) are outputting flame detection signals (all burners (26) (26) (28) (60) If not, it is determined in step (ST19) whether or not a fire extinguishing operation has been performed with the grille knob (42). When it is determined that the fire extinguishing operation has been performed, control is transferred to the above-described step (ST15), and the main gas valve (72) and the afterburner gas valve (74) are closed.

  On the other hand, if it is determined that the fire extinguishing operation is not performed with the grille knob (42) when step (ST19) is executed, it is confirmed in step (ST20) that the afterburner stop switch (44) has been operated. The steps (ST18) to (ST20) are repeated, and the cooking of the food (F) is continued in the smoke purification mode in which the upper and lower fire burners (28) (26) (26) and the afterburner (60) are burned. If the afterburner stop switch (44) is operated during the cooking, control is transferred to the above-described step (ST11), the afterburner gas valve (74) is closed, and the smoke purification is performed. The lamp (46) is turned off.

  In the above embodiment, the afterburner (60) is forcibly burned for 5 seconds in step (ST5) of FIG. 4, but the afterburner (60) is burned to generate an active draft in the exhaust passage (35). As long as energy saving (reducing gas consumption) and cooking performance can be maintained, the time may be other than the above 5 seconds. Also, an exhaust temperature sensor is provided in the exhaust passage (35), and when the exhaust temperature sensor detects a set temperature (a temperature that can secure an active draft in the exhaust passage (35)), the afterburner (60) You may extinguish the fire.

The perspective view of the drop-in stove provided with the grille (G) concerning an embodiment of the invention Longitudinal sectional view of the grill (G) part of the drop-in stove in FIG. Schematic of gas circuit and control circuit of grill (G) Flow chart explaining control operation of grill (G) Illustration of conventional example

Explanation of symbols

(2) ・ ・ ・ Grill storage
(26) ... lower fire burner
(28) ・ ・ ・ Upper burner
(35) ... Exhaust passage
(44) ・ ・ ・ Afterburner stop switch
(60) ・ ・ ・ Afterburner
(62) ・ ・ ・ Catalyst filter

Claims (5)

A grill that is connected to an exhaust passage that is open to the atmosphere;
A grill burner for heating ingredients in the grill,
Afterburner for purifying smoke to burn and disappear the smoke flowing through the exhaust passage,
In a grill comprising a smoke purification mode for burning both the afterburner and the grill burner, and a mode selection means for selecting an energy saving mode for burning only the grill burner,
Igniting means for igniting the afterburner at the time of ignition of the grill burner, regardless of whether the mode selection means is selected from the smoke purification mode and the energy saving mode;
Means for outputting an energy saving start signal for extinguishing the afterburner at a predetermined time after ignition of the afterburner,
A grill that extinguishes the afterburner in response to the energy saving start signal when the afterburner is ignited with the energy saving mode selected by the mode selection means. The grill according to claim 1, wherein
The said predetermined time is a grill when the smoke eliminating timer which measures the combustion time of the said after burner has timed up. The grill according to claim 1 or claim 2,
A grill having a catalyst filter for smoke oxidation that is activated by being heated by the afterburner in the exhaust passage. The grill according to any one of claims 1 to 3,
A grill comprising an afterburner stop switch for forcibly extinguishing the afterburner burning in the smoke purification mode. The grill according to any one of claims 1 to 4,
A gas circuit that branches into the grill burner and the after burner;
A main gas valve provided in a gas circuit upstream from the branched portion;
A gas valve for an after burner provided in a gas circuit between the branching portion and the after burner;
A flame detector for monitoring the combustion state of the afterburner,
A grill that closes the main gas valve when a flame detection signal from the flame detector does not disappear after applying a valve closing signal to the afterburner gas valve to extinguish the afterburner.

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