Cooking appliance

Abstract

To provide a cooling appliance capable of suppressing the waste of gas in an afterburner.SOLUTION: A gas stove comprises a grill device and a distribution device 80. The grill device comprises a grill chamber, an exhaust duct, and an afterburner 7. The grill chamber comprises an upper burner 21 and lower burners 23, 24. The exhaust duct communicates with the rear part of the grill chamber, and discharges combustion exhaust gas flowing from inside of the grill chamber to the outside. The afterburner 7 is attached into the exhaust duct. The distribution device 80 distributes gas to the upper burner 21, the lower burners 23, 24, and the afterburner 7, and links firepower of the afterburner 7 to firepower of the upper burner 21.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a cooking device. [Background technology]

[0002] The grill described in Patent Document 1 comprises a grill compartment for storing food ingredients, upper and lower grill burners installed in the grill compartment for heating and cooking the food ingredients, an exhaust passage leading from the rear of the grill compartment to the outside at the top, and an afterburner installed near the entrance of the exhaust passage for burning off oily smoke generated by the food ingredients. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-13326 Summary of the Invention [Problem to be solved by the invention]

[0004] In the grill described in Patent Document 1, even if the heat output of the grill burner decreases and the amount of combustion exhaust generated decreases, the heat output of the afterburner does not change, which could lead to wasted gas.

[0005] SUMMARY OF THE INVENTION An object of the present invention is to provide a cooking device that can reduce the waste of gas in an afterburner. [Means for solving the problem]

[0006] The cooking device of claim 1 is characterized by comprising a grill chamber equipped with a grill burner, an exhaust duct connected to the rear of the grill chamber and discharging combustion exhaust gas flowing from inside the grill chamber to the outside of the grill chamber, an afterburner attached inside the exhaust duct, and a heat power linkage unit linking the heat power of the afterburner to the heat power of the grill burner.

[0007] The grill burner of the cooking device of claim 2 comprises an upper burner and a lower burner, and the fire power interlocking unit comprises a distributor that distributes and supplies gas to each of the upper burner and the lower burner, and the distributor may comprise an upper burner side supply path for supplying gas to the upper burner, a lower burner side supply path for supplying gas to the lower burner, a branch path branching from the upper burner side supply path for supplying gas to the afterburner, and an adjustment unit that is provided upstream of the branch path of the upper burner side supply path and adjusts the flow rate of gas flowing through the upper burner side supply path.

[0008] A catalyst that is heated and activated by the combustion heat of the afterburner is installed downstream of the afterburner in the exhaust duct of the cooking device of claim 3, and the heat power control unit includes a control unit that controls the operation of the adjustment unit, and when a first condition for limiting the heat power of the upper burner is satisfied, the control unit may limit the flow rate of gas flowing through the upper burner side supply path in the adjustment unit, and when a second condition for the catalyst to be activated by the combustion heat of the afterburner is not satisfied, the adjustment unit may not limit the flow rate of gas even if the first condition is satisfied. [Effects of the Invention]

[0009] According to the cooking device of claim 1, for example, when the heat of the grill is reduced, the combustion exhaust from the grill burner and the oily smoke and odorous components contained therein are reduced. In conjunction with this, the amount of gas supplied to the afterburner is limited, allowing the afterburner to burn appropriately according to the amount of combustion exhaust etc. generated. Therefore, the cooking device can reduce gas waste.

[0010] According to the cooking device of claim 2, the heating power of the afterburner can be linked to the heating power of the upper burner with a simple configuration, thereby suppressing an increase in manufacturing costs.

[0011] According to the heating cooking device of claim 3, the gas flow rate is not restricted in the adjustment section until the second condition for activating the catalyst is met, thereby preventing insufficient removal of oily smoke and odorous components due to insufficient heating power of the afterburner. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view of a gas stove 101. [Figure 2] FIG. 1 is a perspective view of a grill device 1. [Figure 3] FIG. 1 is a cross-sectional perspective view of a grill device 1. [Figure 4] FIG. 2 is a cross-sectional view of the rear half of the grill device 1. [Figure 5] 2 is a diagram showing the flow path configuration of a fuel supply device 40 and a governor device 60. FIG. [Figure 6] FIG. 2 is a block diagram showing the electrical configuration of the gas stove 101. [Figure 7] 10 is a flowchart of an upper heat control process. DETAILED DESCRIPTION OF THE INVENTION

[0013] An embodiment of the present invention will be described below. Unless otherwise specified, the devices, component configurations, flow charts, and the like described below are not intended to be limiting and are merely illustrative examples. The drawings are used to explain technical features that may be adopted by the present invention. In this embodiment, the front-to-back, left-to-right, and up-to-down directions shown in the drawings will be used for explanation. Furthermore, the scales of the drawings do not necessarily match each other, and the drawings are enlarged or reduced as appropriate depending on the objects shown.

[0014] With reference to Figure 1, a gas stove 101 will be described. The gas stove 101 is a built-in stove and is installed inside a kitchen counter (not shown). The gas stove 101 comprises a housing 102 and a top plate 103. A right burner 104 is provided on the top left side of the top plate 103, a left burner 105 is provided on the top left side, a rear burner 106 is provided at the back center, and an exhaust port 107 is provided at the back of the top surface. A lattice-shaped exhaust port cover 108 is attached to the exhaust port 107. A grill device 1 (see Figure 2) is installed in the center inside the housing 102. The grill device 1 comprises a grill chamber 2 (see Figure 2), within which an upper burner 21 and lower burners 23 and 24 are provided.

[0015] A grill door 109 is provided in the center of the front of the housing 102 so that it can be pulled out toward the front. The grill door 109 opens and closes a grill opening 13 (see FIG. 2) on the front side of the grill chamber 2. An exhaust duct 10 is connected to the rear of the grill chamber 2. An exhaust port 49 provided at the top of the exhaust duct 10 is positioned inside the exhaust port 107 of the gas stove 101. Therefore, combustion exhaust generated inside the grill chamber 2 flows through the exhaust duct 10 and is discharged to the outside from the exhaust port 107.

[0016] Two operation knobs 111 and 112 are provided side by side in the right area of ​​the grill door 109. Two operation knobs 113 and 114 are provided side by side in the left area of ​​the grill door 109. The operation knob 111 is pushed in or rotated to ignite, extinguish, and adjust the flame power of the right burner 104. The operation knob 112 is pushed in or rotated to ignite, extinguish, and adjust the flame power of the upper burner 21 and lower burners 23 and 24 in the grill chamber 2. The operation knob 113 is pushed in or rotated to ignite, extinguish, and adjust the flame power of the rear burner 106. The operation knob 114 is pushed in or rotated to ignite, extinguish, and adjust the flame power of the left burner 105. An operation panel 115 is provided below the operation knobs 113 and 114 so as to be able to open and close.

[0017] The housing 102 houses four fuel supply devices that supply gas to the right burner 104, left burner 105, rear burner 106, and grill device 1. The fuel supply device 40 (see FIG. 5), which supplies gas to the upper burner 21 and lower burners 23, 24 of the grill device 1, includes a push-push mechanism, a safety valve 41 (see FIG. 5), a main valve 42 (see FIG. 5), a gas flow path, and other components. An operating knob 112 is attached to the front end of the fuel supply device 40. The push-push mechanism positions the operating knob 112 at the extinguishing position, the depressed position, and the operating position, and maintains the main valve 42 in an open or closed state depending on the position. The push-push mechanism includes a board switch 67 (see FIG. 6) and an igniter switch 68. The board switch 67 and the igniter switch 68 are lever switches that are turned on or off by sliders (not shown) that are linked to the operating knob 112.

[0018] The safety valve 41 is an electromagnetically operated valve that is elastically biased to a closed state that closes the gas flow path, and when opened by the slider, is maintained in the open state by the CPU 31 (see FIG. 6) of the control device 30. The main valve 42 is a valve that opens and closes the gas flow path in response to the depression of the operation knob 112. When the upper burner 21 and the lower burners 23, 24 are extinguished by the closure of the main valve 42, the CPU 31 releases the open state of the safety valve 41. In this case, the safety valve 41 closes the gas flow path by means of a spring.

[0019] The fuel supply device 40 opens and closes the safety valve 41 and the main valve 42, and supplies gas to a governor device 60 (see FIG. 5), which will be described later. The governor device 60 adjusts the flow rate of gas supplied from the fuel supply device 40 in response to the rotation of the operation knob 112, and supplies gas to the upper burner 21 and the lower burners 23, 24.

[0020] The configuration of the grill device 1 will be described with reference to Figures 2 to 4. The grill device 1 comprises a grill chamber 2 and an exhaust duct 10. The grill chamber 2 contains food to be cooked and heats and cooks it using an upper burner 21 and lower burners 23, 24. The upper burner 21 and lower burners 23, 24 generate combustion exhaust within the grill chamber 2 through gas combustion. The exhaust duct 10 is connected to the rear of the grill chamber 2 and has a chimney-like shape that extends upward. The exhaust duct 10 receives the combustion exhaust generated within the grill chamber 2 and discharges it outside the grill chamber 2.

[0021] The structure of the grill chamber 2 will now be described. The grill chamber 2 is a roughly rectangular parallelepiped with an open front. A grill opening 13 is formed in the front of the grill chamber 2. The grill opening 13 is opened and closed by a grill door 109 (see Figure 1). The grill chamber 2 comprises a lower case 11 and an upper case 12. The upper case 12 is fixed to the top of the lower case 11 with screws (not shown). An upper-fire burner 21 is provided in roughly the center of the upper case 12. The combustion surface of the upper-fire burner 21 is positioned facing downward. An electrode of an igniter 7A (see Figure 6) and a thermocouple 8A are supported near the combustion surface of the upper-fire burner 21.

[0022] The structure of the lower case 11 will now be described. The lower case 11 has a bottom wall 15, a right wall 16, a left wall 17, and a back wall 18 (see Figure 3), and is box-shaped with an open top and front. A movement mechanism 19 is provided within the lower case 11. The movement mechanism 19 has rails and supports the grill door and grill grate (not shown) so that they can slide freely in the front-to-rear direction. A lower burner 23 is provided on the inner surface of the right wall 16, extending in the front-to-rear direction. A lower burner 24 is provided on the inner surface of the left wall 17, extending in the front-to-rear direction. The lower burners 23 and 24 face each other and form a flame toward the center of the grill chamber 2. The electrodes of the igniter 7B (see Figure 6) and a thermocouple 8B are supported near the lower burners 23 and 24.

[0023] The structure of the exhaust duct 10 will be described. The exhaust duct 10 comprises a duct bottom plate 27, a burner support base 3, an afterburner 7, and a duct body 4. The duct bottom plate 27 is screwed to the upper rear end side of the lower case 11. The duct bottom plate 27 protrudes rearward from the upper rear end side of the lower case 11 and forms the bottom of the exhaust duct 10.

[0024] The burner support base 3 is fixed to the rear of the grill chamber 2 and to the upper surface of the duct bottom plate 27, and forms the upstream side of the exhaust duct 10 through which the combustion exhaust flows. The burner support base 3 supports the afterburner 7 above the duct bottom plate 27. The afterburner 7 is equipped with a combustion element 70. The combustion surface 75 of the combustion element 70 is arranged facing downward. Therefore, the afterburner 7 is supported above the exhaust passage within the exhaust duct 10. The afterburner 7 forms a flame facing downward on the combustion surface 75. An electrode 352 (see Figure 4) and a thermocouple 8C of an igniter 7C (see Figure 6) are supported near the combustion surface 75 of the afterburner 7.

[0025] The duct body 4 is connected to the rear of the burner support base 3 and forms the portion of the exhaust duct 10 downstream of the afterburner 7. The duct body 4 is roughly box-shaped with openings on the front and bottom. An exhaust port 49 is provided at the rear end of the top surface of the duct body 4. An exhaust passage is formed inside the duct body 4, running from the open front surface toward the exhaust port 49. A catalyst plate 5 is attached at an angle inside the duct body 4. The catalyst plate 5 is positioned midway through the exhaust passage.

[0026] The catalyst plate 5 is rectangular, and is made, for example, of a heat-resistant ceramic plate with multiple small holes, on which an oxidation catalyst such as platinum is supported. The catalyst plate 5 is heated and activated by the heat of combustion from the afterburner 7. When the combustion exhaust gas passes through the catalyst plate 5, the catalyst plate 5 oxidizes the oily smoke in the combustion exhaust, making it odorless and smokeless. A fixing frame 50 is attached to such a catalyst plate.

[0027] The fixed frame 50 is a member for fixing the catalyst plate 5 inside the duct main body 4. The fixed frame 50 has two frames (not shown), and the catalyst plate 5 is sandwiched between these two frames. Inside the duct main body 4, the catalyst plate 5 is attached in a predetermined inclined position via the fixed frame 50. The predetermined inclined position is a position in which one surface (front surface) in the thickness direction of the catalyst plate 5 faces the afterburner 7, its upper end is positioned above the combustion surface 75 and close to the combustion surface 75 in the front-to-rear direction, and its lower end is positioned below the combustion surface 75.

[0028] In such an exhaust duct 10, an expanded width portion 100 is formed behind the mounting position of the afterburner 7. The mounting position of the afterburner 7 is the mounting position of the afterburner 7 on the burner support base 3. The expanded width portion 100 is a box-shaped portion whose vertical width is discontinuous and rises upward significantly behind the mounting position of the afterburner 7.

[0029] Referring to Figure 4, the flow of combustion exhaust gas within the exhaust duct 10 will be described. The combustion exhaust gas flowing from the grill chamber 2 into the exhaust duct 10 flows directly below the combustion surface 75 of the afterburner 7. The afterburner 7 burns and eliminates the oily smoke contained in the combustion exhaust gas. The combustion exhaust gas flowing rearward directly below the combustion surface 75 of the afterburner 7 is pushed into the widened section 100 and diffuses vertically. The catalyst plate 5 is supported within the widened section 100 in an inclined position with its front surface facing diagonally downward. This allows the front surface of the catalyst plate 5 to face the combustion exhaust gas flowing diagonally upward from the combustion surface 75 of the afterburner 7. Therefore, the combustion exhaust gas can pass smoothly through the porous interior of the catalyst plate 5, so the grill device 1 can prevent excessive exhaust resistance within the exhaust duct 10.

[0030] The catalyst plate 5 is then heated and activated by the heat of combustion from the afterburner 7. Within the widened section 100, the exhaust gas diffuses vertically and uniformly contacts the catalyst plate 5. As the exhaust gas passes through the catalyst plate 5, the oily smoke in the exhaust gas is oxidized, making it odorless and smokeless.

[0031] Furthermore, the combustion heat that flows downward from the combustion surface 75 along the combustion direction of the afterburner 7 is pushed toward the widened section 100 by the flow of exhaust combustion air from inside the grill chamber 2. The combustion heat pushed into the widened section 100 is widely diffused in the vertical direction together with the exhaust combustion air. This allows the exhaust duct 10 to uniformly transfer the combustion heat of the afterburner 7 to the catalyst plate 5, so that the catalyst plate 5 is heated uniformly and without waste. Therefore, the grill device 1 can evenly dissipate the oily smoke in the exhaust combustion air over a wide area of ​​the catalyst plate 5.

[0032] The combustion exhaust gas that has passed through the catalyst plate 5 and has been rendered odorless and smokeless is discharged from the exhaust duct 10 through the exhaust port 49.

[0033] In this exhaust duct 10, the catalyst plate 5 is supported in the widened portion 100 in the inclined position described above, so that the front surface of the catalyst plate 5 is close to the combustion surface 75, and the front surface of the catalyst plate 5 faces the combustion surface 75. This allows the grill device 1 to efficiently heat the catalyst plate 5 using the combustion heat of the afterburner 7, further improving the oily smoke dissipation effect of the catalyst plate 5.

[0034] Referring to Figure 5, the configuration of the flow path for supplying gas to the grill device 1 will be described. The upper burner 21, lower burners 23 and 24, and afterburner 7 burn gas supplied from the outside via the fuel supply device 40 and the governor device 60. As described above, the fuel supply device 40 includes a safety valve 41 and a main valve 42, which are arranged in series on the gas flow path. Therefore, the fuel supply device 40 supplies gas to the governor device 60 only when both the safety valve 41 and the main valve 42 are open.

[0035] The governor device 60 is installed behind and below the fuel supply device 40 inside the housing 102, and is connected to the fuel supply device 40 by a gas pipe 55. The governor device 60 includes a gas governor 61 and a distribution device 80. The gas governor 61 adjusts the supply pressure of the gas supplied from the fuel supply device 40 through the gas pipe 55 and supplies the gas to the distribution device 80.

[0036] The distributor 80 distributes the gas whose pressure has been adjusted by the gas governor 61 to the upper burner 21, the lower burners 23 and 24, and the afterburner 7. The distributor 80 includes gas pipes 62-64, bypass pipes 65 and 66, solenoid valves 81-83, and needle valves 84 and 85.

[0037] The gas pipe 62 is connected between the gas governor 61 and the lower burners 23, 24. The solenoid valve 81 is provided midway along the gas pipe 62 and is driven in accordance with a control command from the CPU 31 to open and close the flow path of the gas pipe 62. A bypass pipe 65 is provided in the gas pipe 62 so as to bypass the solenoid valve 81. A needle valve 84 is provided midway along the bypass pipe 65. Therefore, even if the solenoid valve 81 closes the flow path of the gas pipe 62, gas passes through the flow path of the bypass pipe 65 via the needle valve 84 and flows to the lower burners 23, 24. The flow rate of gas passing through the flow path of the bypass pipe 65 via the needle valve 84 is less than the flow rate of gas passing through the flow path of the gas pipe 62 via the solenoid valve 81.

[0038] A branch section 77 is provided in the gas pipe 62 upstream of the portion to which the upstream end of the bypass pipe 65 is connected. The gas pipe 63 is connected between the branch section 77 and the top-fire burner 21. A solenoid valve 82 is provided midway along the gas pipe 63 and is driven in accordance with a control command from the CPU 31 to open and close the flow path of the gas pipe 63. A bypass pipe 66 is provided in the gas pipe 63 so as to bypass the solenoid valve 82. A needle valve 85 is provided midway along the bypass pipe 66. Therefore, even if the solenoid valve 82 closes the flow path of the gas pipe 63, gas passes through the flow path of the bypass pipe 66 via the needle valve 85 and flows to the top-fire burner 21. The flow rate of gas passing through the flow path of the bypass pipe 66 via the needle valve 85 is smaller than the flow rate of gas passing through the flow path of the gas pipe 63 via the solenoid valve 82.

[0039] The solenoid valve 83 is provided between the portion of the gas pipe 63 to which the downstream end of the bypass pipe 66 is connected and the top burner 21, and is driven in accordance with control instructions from the CPU 31 to open and close the flow path of gas circulating to the top burner 21. A branch section 78 is provided in the gas pipe 63 between the solenoid valve 83 and the top burner 21. The gas pipe 64 is connected between the branch section 78 and the afterburner 7. As a result, the gas flowing through the gas pipe 63 branches at the branch section 78 into a flow path that flows to the top burner 21 and a flow path that flows via the gas pipe 64 to the afterburner 7.

[0040] In this way, the governor device 60 adjusts the heating power of the upper burner 21 and the lower burners 23 and 24 by switching the drive states of the two solenoid valves 81, 82, and 83 based on control commands from the CPU 31. Note that the solenoid valve 83 is controlled to an open state when the heating power of the upper burner 21 and the lower burners 23 and 24 is adjusted by rotating the operation knob 112. The upper burner 21 burns at a high flame when the solenoid valves 82 and 83 are open, and burns at a low flame when the solenoid valve 82 is closed. The lower burners 23 and 24 burn at a high flame when the solenoid valve 81 is open, and burns at a low flame when the solenoid valve 81 is closed.

[0041] As described above, the flow path of the gas pipe 63 leading to the top burner 21 branches at the branching point 78 into a flow path leading to the afterburner 7. This allows the governor device 60 to simultaneously limit the amount of gas supplied to the afterburner 7 in conjunction with the amount of gas supplied to the top burner 21, which changes through drive control of the solenoid valve 82. In other words, the heating power of the afterburner 7 can be adjusted in conjunction with the heating power of the top burner 21.

[0042] For example, in the grill chamber 2, the amount of combustion exhaust varies in proportion to the heat power of the top burner 21. If the heat power is strong, the amount of combustion exhaust increases, and if the heat power is weak, the amount of combustion exhaust decreases. The grill device 1 can limit the heat power of the afterburner 7 in conjunction with the heat power of the top burner 21, so if the amount of combustion exhaust generated in the grill chamber 2 is small, the heat power of the afterburner 7 can be weakened, and if the amount of combustion exhaust generated in the grill chamber 2 is large, the heat power of the afterburner 7 can be strengthened. In other words, the grill device 1 can appropriately burn the afterburner 7 according to the amount of combustion exhaust etc. generated in the grill chamber 2. Therefore, the grill device 1 can effectively suppress gas waste.

[0043] Furthermore, the governor device 60 can simultaneously control the combustion state of the upper burner 21 and the afterburner 7 by switching the drive state of the solenoid valve 83 based on a control command from the CPU 31. For example, when only the upper burner 21 is to be extinguished while the lower burner 22 remains in a combustion state, the governor device 60 can extinguish the upper burner 21 by closing the solenoid valve 83, and in conjunction with this, can also extinguish the afterburner 7. In this case, gas waste can also be further reduced.

[0044] Next, we will explain an example of heat control in the grill device 1. In the gas stove 101 of this embodiment, when cooking using the grill device 1, one of four cooking modes can be selected: toast mode, dried fish mode, fillet mode, and whole fish grill mode. The cooking mode can be selected using the operation panel 115.

[0045] In the toast mode, bread is placed on a tray (not shown) installed in the grill chamber 2, and initially both the upper burner 21 and the lower burners 23, 24 in the grill chamber 2 are fired to raise the temperature inside the chamber, after which the upper burner 21 is turned off and the bread is toasted using the heat inside the grill chamber 2 for a predetermined time. In contrast, in the dried fish mode, fillet mode, and whole fish grilling mode, the heat power and heating time of the upper burner 21 and the lower burner 23, 24 are set according to the moisture content of the food to be cooked, and cooking is performed using the respective heat power and heating time. For example, dried fish contains the least moisture, followed by fillets and whole fish grilling, so the heating time is shortest in the dried fish mode and longest in the fillet mode and whole fish grilling mode.

[0046] Then, based on one of these four cooking modes selected by the operation panel 115, combustion control is executed in the grill chamber 2, and the heat power of the upper burner 21 and the lower burners 23, 24 is controlled. The heat power of the afterburner 7 is also controlled in conjunction with the heat power of the upper burner 21.

[0047] The electrical configuration of the gas stove 101 will be described with reference to Figure 6. In this embodiment, only the configuration related to the operation control of the grill device 1 will be described, and the configuration related to the operation control of the other right burner 104, left burner 105, and rear burner 106 will not be described. The gas stove 101 is equipped with a control device 30. The control device 30 includes a CPU 31, a ROM 32, a RAM 33, a timer 34, etc. The CPU 31 controls the various operations of the gas stove 101. The ROM 32 stores various programs, etc. The RAM 33 temporarily stores various information. The timer 34 measures, for example, the heating time and the elapsed time since the burner ignition in the control process for executing the above four cooking modes.

[0048] The control device 30 is connected to a power supply circuit 90, a switch input circuit 91, an igniter circuit 92, a thermocouple input circuit 93, a sensor input circuit 94, a safety valve circuit 95, solenoid valve circuits 96-98, an operation panel 115, and the like. The power supply circuit 90 steps down and rectifies AC (e.g., 100 V) supplied from a power supply 120 to DC (e.g., 5 V), and supplies power to various circuits. The switch input circuit 91 detects the on / off states of the board switches 67 and igniter switches 68 of the four fuel supply devices, and inputs the detected states to the power supply circuit 90 and the control device 30. The control device 30 operates when the board switches 67 of any of the four fuel supply devices are turned on, and stops operating when the board switches 67 of all of the fuel supply devices are turned off.

[0049] The thermocouple input circuit 93 inputs the detected values ​​(signals corresponding to thermoelectromotive forces) from the thermocouples 8A to 8C to the control device 30. The igniter circuit 92 drives the corresponding igniters 7A to 7C based on the control signal output by the CPU 31 in accordance with the state of the igniter switch 68 of each fuel supply device. The sensor input circuit 94 inputs the detected value (signal corresponding to the detected temperature) from the temperature sensor 25 provided in the grill chamber 2 to the control device 30.

[0050] A safety valve circuit 95 opens and closes the safety valve 41 of the fuel supply device 40 under the control of the CPU 31. A solenoid valve circuit 96 opens and closes the solenoid valve 81 of the distribution device 80 under the control of the CPU 31. A solenoid valve circuit 97 opens and closes the solenoid valve 82 of the distribution device 80 under the control of the CPU 31. A solenoid valve circuit 98 opens and closes the solenoid valve 83 of the distribution device 80 under the control of the CPU 31. An operation panel 115 receives various inputs and displays various information under the control of the CPU 31.

[0051] The upper fire control process will be described with reference to Figure 7. The upper fire control process controls the thermal power of the upper fire burner 21 based on the activation conditions of the catalyst plate 5. For example, when any of the operation knobs 111 to 114 is pressed and the corresponding board switch 67 is turned on, the CPU 31 reads out an upper fire control program from the ROM 32 and executes this process.

[0052] The CPU 31 determines whether the upper burner 21, the lower burners 23, 24 in the grill chamber 2, and the afterburner 7 in the exhaust duct 10 are ignited (S11). The CPU 31 determines whether each burner is ignited based on the detection signals from the thermocouples 8A to 8C. If any one of the burners is not ignited (S11: NO), it is determined that a misfire has occurred, and the CPU 31 ends this process.

[0053] When all the burners are ignited (S11: YES), the solenoid valves 81 to 83 are all open. Therefore, a normal amount of gas flows to the upper burner 21, and a normal amount of gas also flows to the lower burners 23 and 24. In addition, in conjunction with the upper burner 21, a normal amount of gas also flows to the afterburner 7.

[0054] In this case, the CPU 31 determines whether or not the first condition is satisfied (S12). The first condition is an operational instruction to limit the heat power of the upper burner 21. Here, "limiting the heat power" includes an operation to reduce the heat power and an operation to extinguish the upper burner 21. For example, when one of the above four cooking modes is set and the heat power control of the upper burner 21 and the lower burners 23, 24 is being executed in the set cooking mode, the first condition is satisfied if an operational instruction to limit the heat power of the upper burner 21 is issued. In addition, when the operation knob 112 is rotated to a position to reduce the heat power, the first condition is satisfied. If the first condition is not satisfied (S12), the CPU 31 keeps the solenoid valve 82 open and maintains the gas flow rate at the normal rate (S14).

[0055] For example, if the first condition is met by rotating the operating knob 112 to a position that reduces the heat (S12: YES), the CPU 31 determines whether the second condition is met (S13). The second condition is, for example, that a predetermined time has elapsed since a cold start, in which ignition occurs when the temperature inside the grill chamber 2 is below a predetermined temperature. Here, the predetermined time is preferably set to the time after the cold start when the catalyst plate 5 is assumed to have been sufficiently activated by the combustion heat of the afterburner 7.

[0056] If the second condition is met (S13: YES), the catalyst plate 5 is already activated, so the CPU 31 restricts the gas flow rate to the upper burner 21 (S15) by, for example, closing the solenoid valve 82, and controls the heat to low. Note that in the case of an operation instruction to extinguish the upper burner 21, the CPU 31 may close the solenoid valve 83 to cut off the gas flow rates to both the upper burner 21 and the afterburner 7.

[0057] On the other hand, if the second condition is not met (S13: NO), the predetermined time has not elapsed since the cold start, and the catalyst plate 5 is not sufficiently activated. Therefore, even if the operation knob 112 is rotated to a position that reduces the heat, the CPU 31 maintains the normal gas flow rate without closing the solenoid valves 82 and 83 (S14). Even if an instruction to limit the heat of the upper burner 21 is issued during the execution of heat control of the upper burner 21 and the lower burners 23 and 24 in cooking mode, the CPU 31 maintains the normal gas flow rate without closing the solenoid valves 82 and 83 (S14). This allows the catalyst plate 5 to continue to be heated by the combustion heat of the afterburner 7, allowing it to be sufficiently activated. Therefore, the gas stove 101 can prevent the catalyst plate 5 from being insufficiently activated, resulting in insufficient removal of oily smoke and odorous components by the catalyst plate 5.

[0058] Next, the CPU 31 determines whether the upper burner 21, the lower burners 23 and 24, and the afterburner 7 are extinguished (S16). If they are not extinguished (S16: NO), the CPU 31 returns to S12 and repeats the above process. Then, if the first condition continues to be met with the operation knob 112 rotated to the position that reduces the flame power (S12: YES), and if a predetermined time has passed since the cold start and the second condition is met (S13: YES), the CPU 31 closes the solenoid valve 82 to limit the gas flow rate to the upper burner 21 (S15), controlling the flame power to low. As a result, the catalyst plate 5 is sufficiently activated, so that oily smoke and odorous components can be sufficiently removed even when the upper burner 21 is controlled to low flame power.

[0059] Then, if the upper burner 21, the lower burners 23 and 24, and the afterburner 7 are extinguished (S16: YES), the CPU 31 ends this process.

[0060] In the above description, the gas stove 101 or grill device 1 is an example of a "cooking device" of the present invention. The gas pipe 62 is an example of a "lower burner side supply path" of the present invention. The gas pipe 63 is an example of an "upper burner side supply path" of the present invention. The gas pipe 64 is an example of a "branch path". The distribution device 80 is an example of a "heat power interlocking section" of the present invention. The catalyst plate 5 is an example of a "catalyst" of the present invention. The solenoid valve 82 is an example of an "adjustment section" of the present invention. The CPU 31 is an example of a "control section" of the present invention.

[0061] As described above, the gas stove 101 of this embodiment includes the grill device 1 and the distributor 80. The grill device 1 includes the grill chamber 2, the exhaust duct 10, and the afterburner 7. The grill chamber 2 includes the upper burner 21 and the lower burners 23 and 24. The exhaust duct 10 is connected to the rear of the grill chamber 2 and discharges the combustion exhaust gas flowing from the grill chamber 2 to the outside of the grill chamber 2. The afterburner 7 is attached to the exhaust duct 10. The distributor 80 distributes gas to the upper burner 21, the lower burners 23 and 24, and the afterburner 7, and synchronizes the heating power of the afterburner 7 with the heating power of the upper burner 21. For example, when the heating power in the grill chamber 2 is reduced, the combustion exhaust gas from the grill chamber 2 and the oily smoke and odor components contained therein decrease. The amount of gas supplied to the afterburner 7 is accordingly limited, allowing the afterburner 7 to burn appropriately according to the amount of combustion exhaust gas and other generated exhaust gases. Therefore, the gas stove 101 can reduce gas waste.

[0062] The distribution device 80 includes gas pipes 62, 63, 64, a solenoid valve 82, and a bypass pipe 66. The gas pipe 62 supplies gas to the bottom burners 23, 24. The gas pipe 63 supplies gas to the top burner 21. The gas pipe 64 branches off from a branching section 78 provided on the gas pipe 63 and supplies gas to the afterburner 7. The solenoid valve 82 is provided on the gas pipe 63. The bypass pipe 66 is provided on the gas pipe 63 and bypasses the solenoid valve 82. The bypass pipe 66 and the solenoid valve 82 are provided upstream of the branching section 78 of the gas pipe 63, and the flow rate of gas flowing through the gas pipe 63 is adjusted by opening and closing the solenoid valve 82. As a result, the gas stove 101 can link the heating power of the afterburner 7 to the heating power of the top burner 21 with a simple configuration, thereby suppressing increases in manufacturing costs.

[0063] A catalyst plate 5 that is heated and activated by the combustion heat of the afterburner 7 is attached downstream of the afterburner 7 in the exhaust duct 10. The gas stove 101 is equipped with a CPU 31 of the control device 30. The CPU 31 controls the operation of the solenoid valve 82. When the first condition for limiting the heating power of the top burner 21 is met, the CPU 31 closes the solenoid valve 82 to limit the flow rate of gas flowing through the gas pipe 63. On the other hand, when the second condition for activation by the combustion heat of the afterburner 7 is not met, the solenoid valve 82 is not closed and the gas flow rate is not limited, even if the first condition is met. This allows the gas stove 101 to prevent insufficient removal of oily smoke and odorous components by the catalyst plate 5 due to insufficient heating power of the afterburner 7.

[0064] The present invention is not limited to the above embodiment, and various modifications are possible. The gas stove 101 in the above embodiment is a built-in stove, but it may also be a table stove. Furthermore, the gas stove 101 is an example of the "heat cooking device" of the present invention, but it may also be the grill device 1 of the above embodiment equipped with the grill chamber 2.

[0065] In the above embodiment, the second condition is satisfied when a predetermined time has elapsed since a cold start, but other methods may be used to determine this. For example, the temperature of the catalyst plate 5 or its surroundings may be measured by a temperature sensor, and the second condition may be satisfied if the measured temperature is equal to or higher than a predetermined temperature.

[0066] In the above embodiment, the solenoid valve 82 and the bypass pipe 66 have been described as an example of the "adjustment unit" of the present invention, but for example, an electric valve that can continuously throttle the flow path by driving a motor may be provided instead of the solenoid valve 82 and the bypass pipe 66. The flow path configuration of the upper burner 21 and the lower burners 23, 24 is not limited to the example shown in Figure 5.

[0067] In the above embodiment, the grill chamber 2 is provided with the upper burner 21 and the lower burners 23, 24, but it may be provided with, for example, only the upper burner or only the lower burner. In this case, the heating power of the afterburner 7 may be linked to the heating power of either burner. [Explanation of symbols]

[0068] 1 Grilling device 2 Grill compartment 5 Catalyst Plate 7. Afterburner 10 Exhaust duct 21 Top burner 23 Lower burner 24 Lower burner 31 CPU 62 Gas Pipe 63 Gas Pipe 64 Gas Pipe 80 Distribution device 82 Solenoid valve 101 Gas stove

Claims

1. A grill cabinet equipped with a grill burner; An exhaust duct that communicates with the rear of the grill chamber and discharges combustion exhaust gas flowing from inside the grill chamber to the outside of the grill chamber; an afterburner mounted within the exhaust duct; a heat power interlocking unit that interlocks the heat power of the afterburner with the heat power of the grill burner; Having A heating and cooking device characterized by the above.

2. The grill burner includes an upper burner and a lower burner, The thermal power interlocking unit includes a distributor that distributes and supplies gas to each of the upper burner and the lower burner, The dispensing device comprises: an upper burner side supply passage for supplying gas to the upper burner; a lower burner side supply passage for supplying gas to the lower burner; a branch passage branching from the upper burner side supply passage for supplying gas to the afterburner; an adjusting unit that is provided on the upper burner side supply path upstream of the branch path and adjusts the flow rate of gas flowing through the upper burner side supply path; Having The heating and cooking device according to claim 1 .

3. a catalyst that is heated and activated by combustion heat from the afterburner is installed in the exhaust duct downstream of the afterburner; a control unit for controlling the operation of the adjustment unit; The control unit When a first condition for limiting the heat power of the upper burner is satisfied, the flow rate of the gas flowing through the upper burner side supply passage is limited by the adjusting unit, When the second condition that the catalyst is activated by the combustion heat of the afterburner is not satisfied, the flow rate of the gas is not restricted by the adjusting unit even if the first condition is satisfied. The heating and cooking device according to claim 2 .

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