JP7200009B2 - Gas stove - Google Patents

Description

The present invention relates to gas stoves.

Generally, in a gas stove, the gas burner is exposed through a burner opening formed in the top plate. At this time, a gap is formed between the gas burner and the top plate (the inner peripheral edge of the burner opening). is provided with a burner ring covering the (see Patent Document 1).

This type of burner ring is a tapered, doughnut-shaped disk whose outer diameter is larger than the burner opening.

However, since the inner peripheral edge of the burner ring is positioned outside the gas burner, spilled juice enters between the burner ring and the gas burner and becomes dirty.

JP-A-62-272024

In view of the above points, an object of the present invention is to provide a gas stove capable of suppressing the inflow of boiled-over juice between the burner ring and the gas burner.

In order to achieve this object, the present invention provides a stove body having a gas burner and an open top, a top plate covering the upper surface of the stove body, and a burner for exposing the gas burner formed on the top plate. A gas stove provided with an opening and a burner ring covering a gap formed between the burner opening and the gas burner, wherein the gas burner comprises a burner body having a fuel gas distribution chamber formed therein; and the burner body. a burner head placed thereon to form a large number of flame holes between itself and the burner body; and the burner ring is formed with a large number of grooves extending radially through the burner head. The burner has an inner peripheral edge located radially inward from the outer end of the lower end surface of the outer peripheral wall and radially inward from the outer end of the surface of the burner body on which the burner head is mounted. The inner peripheral edge of the ring is interposed between the burner body and the burner head and positioned inside the flame hole. It is characterized by forming a tapered surface that gradually descends toward it .

In the gas stove of the present invention, the inner peripheral edge of the burner ring is located radially inwardly of the outer end of the flame hole of the gas burner. As a result, the boiled juice that has fallen from above the burner head is blocked by the burner head and does not reach the inner peripheral edge of the burner ring inside the flame hole.

Therefore, according to the present invention, it is possible to provide a gas stove capable of suppressing the inflow of boiled-over juice between the burner ring and the gas burner.

Furthermore, since the inner peripheral edge of the burner ring is shaped to intervene between the burner body and the burner head, the boundary between the burner ring and the burner body is hidden below the burner head, It is possible to reliably prevent boiled-over juice from entering the inside of the burner ring from the boundary between the burner ring and the burner body.

Further, in the present invention, the inner peripheral edge of the burner ring is in contact with the burner body over the entire circumference to form a sealing surface.

Further, in the gas stove of the present invention, the ring temperature sensor for detecting the temperature of the burner ring, and when the temperature detected by the ring temperature sensor reaches a preset temperature for preventing burning of boiled-over juice or non-sticking temperature , It is preferable to provide a combustion control device for reducing the amount of combustion of the gas burner.

Since the burner ring is in contact with the burner body, the heat of the burner body is transferred to the burner ring during combustion of the gas burner, resulting in a higher temperature than when the burner ring is not in contact with the burner body. When the burner ring reaches a high temperature, it may become difficult to remove (peel off) the burner ring from the burnt-on (burnt-on) contaminants such as spilled juice.

Therefore, in the present invention, the temperature of the burner ring detected by the ring temperature sensor is set in advance based on the temperature at which there is a risk of burning or scorching of the juice that has been boiled over. When the preventive temperature is reached, the combustion control device reduces the combustion rate of the gas burner (including stopping combustion).

According to this, it is possible to suppress burning (burning) of the boiled-over juice or the like adhering to the burner ring, and it is possible to easily remove (separate) the boiled-over juice or the like from the burner ring.

The figure which shows typically the structure of the gas stove which is embodiment of this invention. An explanatory side view of a gas burner in this embodiment. Explanatory sectional drawing which expands and shows the principal part of the burner for stoves of FIG. 4 is a flowchart showing an example of control by a controller; An explanatory side view of another stove burner. Explanatory sectional drawing which expands and shows the principal part of the burner for stoves of FIG.

An embodiment of the present invention will be described based on the drawings. As shown in FIG. 1, the gas stove 1 of the present embodiment includes a burner 2 (gas burner), a controller 3 for controlling the burner 2, and a desired instruction and various settings to the controller 3 by a user's operation. An operation panel 4 comprising a group of switches for performing operations is provided. The burner 2 and the controller 3 are housed in a box-shaped stove main body 5, part of which is indicated by phantom lines in the figure. The open upper surface of the stove main body 5 is closed by a top plate 6. - 特許庁

Fuel gas is supplied to the burner 2 through a gas supply pipe 7 . The gas supply pipe 7 includes a main solenoid valve 8 for opening and closing the gas supply pipe 7, a flow control valve 9 for adjusting the flow rate of the fuel gas flowing through the gas supply pipe 7, and a flow control valve 9 when the flow control valve 9 is closed. An orifice 10 is provided to ensure a minimum flow of fuel gas. The main solenoid valve 8 is opened when energized under the control of the controller 3 and closed when energized. The flow control valve 9 is driven to open and close by a motor 11 . The motor 11 is controlled by a combustion control section 3a functionally provided in the controller 3 . The combustion control unit 3 a adjusts the opening degree of the flow control valve 9 via the motor 11 .

The top plate 6 is provided with a burner opening 6a. A trivet 12 is placed on the top plate 6 so as to surround the burner opening 6a.

At the center of the burner 2 , a pot bottom temperature sensor 13 is provided that contacts the bottom of the cooking container W when the cooking container W such as a pot is placed on the trivet 12 . The pan bottom temperature sensor 13 detects the temperature of the bottom of the cooking vessel W heated by the burner 2 and outputs a signal indicating the detected temperature.

An ignition plug 14 and a ring temperature sensor 15 are provided inside the stove main body 5 near the burner 2 . The ignition plug 14 is driven by the igniter 16 to discharge for ignition. The ring temperature sensor 15 detects the temperature of a burner ring 17 (see FIGS. 2 and 3), which will be described later, and outputs a signal indicating the detected temperature.

As shown in FIG. 2, the burner 2 includes a mixing tube portion 18 installed in the stove main body 5, and a burner body 19 connected to the mixing tube portion 18 and exposed on the top plate 6 through the burner opening 6a. , and a burner head 20 detachably mounted on the burner body 19 .

Further, as shown in FIGS. 2 and 3, the burner 2 includes a cover plate 21 covering the upper part of the burner head 20 with a predetermined gap, and a burner body 19 extending radially outward from the outer periphery of the burner body 19. A ring 17 is provided. The pan bottom temperature sensor 13 penetrates the cover plate 21 and protrudes upward.

A gas nozzle (not shown) faces the upstream end of the mixing pipe portion 18, and the fuel gas jetted from the gas nozzle is mixed with the primary air sucked from the upstream end of the mixing pipe portion 18 along with the jet flow of the fuel gas. A mixed gas is produced by mixing within the tube portion 18 .

As shown in FIG. 3, inside the burner body 19, an annular distribution chamber 22 communicating with the mixing tube portion 18 is formed. The burner body 19 also has an annular surface 23 provided to cover the upper portion of the distribution chamber 22 . The annular surface 23 is formed in an annular shape, sloping upward from the inside toward the outside.

The burner head 20 has an inner cylindrical portion 24 formed in a cylindrical shape and extending vertically downward at the central portion, and the inner cylindrical portion 24 closes the inside of the distribution chamber 22 of the burner body 19 . Inside the inner cylindrical portion 24, the pan bottom temperature sensor 13 supported inside the stove main body 5 by a support member (not shown) penetrates and stands.

An outer peripheral wall 25 projecting downward is integrally provided at the outer peripheral end of the burner head 20 . A lower end surface of the outer peripheral wall 25 is in contact with the upper surface of the annular surface 23 . Thereby, the burner head 20 is mounted on the burner body 19 via the outer peripheral wall 25 .

The outer peripheral wall 25 is formed with a large number of grooves radially penetrating the burner head 20 along the radial direction. The lower end side of each groove is open, and when the lower end surface of the outer peripheral wall 25 abuts against the annular surface 23, a large number of flame holes 26 whose lower surface is the annular surface 23 are formed in the outer periphery of the burner head 5. .

As shown in FIG. 3, the burner ring 17 is attached to the burner body 19 and covers the gap between the burner body 19 and the inner peripheral edge of the burner opening 6a in the top plate 6 from above. The upper end of the burner ring 17 is formed with a tapered surface that gradually descends radially outward. is formed in

The lower surface of the inner peripheral projection 27 is in contact with the upper surface of the outer end of the annular surface 23, which is a part of the outer peripheral surface of the burner body 19, over the entire circumference to form a seal surface. It is sandwiched between the head 20 and the head 20 . In this way, since the inner peripheral ridge 27, which is a part of the burner ring 17, constitutes a part of the bottom of the burner hole 26, the inner peripheral edge of the inner peripheral ridge 27 at the upper end of the burner ring 17 extends over the entire circumference. It is positioned radially inward of the outer peripheral surface of the burner head 20 . Therefore, when the burner 2 is viewed from above, the inner peripheral edge of the inner peripheral ridge 27 of the burner ring 17 is hidden by the burner head 20 and cannot be visually recognized. The inner peripheral edge of the inner peripheral ridge 27 corresponds to the inner peripheral edge of the present invention.

As described above, for example, when the liquid boiled over from a cooking vessel such as a pot flows down from above the flame hole 26 during cooking, the liquid boiled over not only flows outward due to the tapered surface of the upper end of the burner ring 17, but also , the possibility that the boiled-over juice reaches the inner peripheral edge of the inner peripheral ridge 27 positioned radially inward and downward from the outer peripheral edge of the burner head 20 is extremely low.

Moreover, the lower surface of the inner circumferential projection 27 of the burner ring 17 contacts the upper surface of the outer end portion of the annular surface 23 to form a sealing surface. Therefore, even if the boiled-over juice enters between the burner ring 17 and the burner body 19, it will not flow below the seal surface formed by the inner peripheral ridge 27 of the burner ring 17. - 特許庁

Therefore, it is possible to avoid the spilled juice from entering the inside of the stove main body 5 through between the burner ring 17 and the burner body 19 as much as possible, and the inside of the stove main body 5 can be kept clean, so that the inside can be cleaned. maintenance work can be reduced.

By the way, since the burner ring 17 is in contact with the burner body 19, the heat from the burner 2 is transmitted and the temperature becomes relatively high. If the boiled-over juice adheres to the excessively heated burner ring 17, the boiled-over juice sticks to the surface of the burner ring 17 and becomes dirty. Such dirt adheres to the burner ring 17 and is difficult to remove even by cleaning.

The temperature of the burner ring 17 rises according to the heating power of the burner 2 and time. In order to detect the temperature of the burner ring 17, the gas stove 1 of this embodiment has a ring temperature sensor 15. As shown in FIG. The ring temperature sensor 15 may be exposed to excessive heat when the burner 2 continues to heat at a high level, when cooking using a pan with large radiation, or when abnormal combustion occurs due to incorrect setting of the burner head 20. Detect high temperatures. In this embodiment, the ring temperature sensor 15 uses a non-contact sensor such as an infrared sensor, but may be a contact sensor.

The combustion control section 3a of the controller 3 performs control to reduce the thermal power (combustion amount) of the burner 2 in accordance with the increase in temperature detected by the ring temperature sensor 15. FIG.

An example of control by the combustion control section 3a of the controller 3 at this time will be described. As shown in FIG. 4, when the use of the gas stove is started and the ignition operation (turning on of the igniter 16 accompanying the operation) is performed in STEP 1, the combustion control unit 3a starts energizing the main solenoid valve 8 in STEP 2. Then, in STEP3, the flow control valve 9 is opened. This causes the burner 2 to start combustion.

Next, the combustion control section 3a proceeds to STEP4 and monitors the temperature detected by the ring temperature sensor 15. FIG. That is, in STEP 4, when the detected temperature of the ring temperature sensor 15 is not equal to or lower than the temperature T, the process proceeds to STEP 5 and the flow control valve 9 is closed. As a result, the fuel gas that has passed through the orifice 10 is supplied to the burner 2, and the burner 2 becomes the minimum heating power (so-called low flame). The combustion control unit 3a returns from STEP5 to STEP4 to enter a thermal power monitoring state.

The temperature T is an anti-burning or non-sticking temperature for the juice that has been boiled over, which is set in advance based on the temperature at which the juice that is boiled over can cause burning or scorching, and is set to 200° C. in this embodiment. However, the temperature T is not limited to 200.degree.

When proceeding from STEP 4 to STEP 5, the heating power of the burner 2 is reduced (the amount of combustion is reduced), thereby suppressing excessive temperature rise of the burner ring 17 . As a result, it is possible to prevent the burner ring 17 from being burnt or scorched when the spilled juice adheres to the burner ring 17, thereby reducing the trouble of cleaning.

Further, when the temperature detected by the ring temperature sensor 15 is equal to or lower than the temperature T in STEP4, the process proceeds to STEP6. In STEP6, the state of the flow control valve 9 at the time of proceeding to STEP4 is maintained, and the process proceeds to STEP7. In STEP7, when the burner 2 is not controlled by the temperature control mode, the process proceeds to STEP8, and when it is controlled by the temperature control mode, the process proceeds to STEP10.

If the fire extinguishing operation is not performed in STEP8, the process returns to STEP4. When the fire extinguishing operation is performed in STEP8, the process proceeds to STEP9, the main solenoid valve 8 is closed, and the use of the stove ends.

Further, if the flow control valve 9 is open when proceeding from STEP7 to STEP10, the process returns to STEP7 to continue the control in the temperature control mode. Here, if the flow control valve 9 is closed when proceeding to STEP10, the process proceeds to STEP11. If the temperature gradient detected by the ring temperature sensor 15 tends to decrease in STEP 11, the process returns to STEP 7 and the control in the temperature control mode is continued. On the other hand, when the temperature gradient detected by the ring temperature sensor 15 in STEP 11 tends to rise, proceed to STEP 12 to report an error in the temperature control mode, proceed to STEP 9 to close the original solenoid valve, and forcibly turn on the stove. terminate use.

As described above, the combustion control section 3a of the controller 3 controls the thermal power of the burner 2 based on the temperature detected by the ring temperature sensor 15, so that even if the heat generated by the combustion of the burner 2 is transmitted to the burner ring 17, the burner An excessive temperature rise of the ring 17 can be suppressed.

Next, based on FIG.5 and FIG.6, the structure of the burner 30 and the burner ring 31 is demonstrated as a reference example. The configuration of the gas stove provided with this burner 30 is the same as the configuration shown in FIG. 1 except for the burner 30 and the burner ring 31.

As shown in FIG. 5, the burner 30 (gas burner) is a so-called parent-child burner, and includes a first mixing tube section 32 and a second mixing tube section (not shown). A burner body 33 is connected to the first mixing pipe portion 32 and the second mixing pipe portion and exposed on the top plate 6 through the burner opening 6 a of the top plate 6 . A burner head 34 is detachably mounted on the burner body 33 , and a burner ring 31 expanding radially outward is provided on the outer periphery of the burner body 33 .

The burner body 33, as shown in FIG. 6, has two distribution chambers 33a and 33b inside. An annular surface 35 is formed at the upper end of a portion of the burner body 33 forming a so-called child burner. The annular surface 35 is formed in an annular shape, sloping upward from the inside to the outside.

The burner head 34 is composed of an annular lower head 34a and an upper head 34b assembled on top of the lower head 34a. An upper inner tubular portion 36 formed in a tubular shape and extending vertically downward is formed in the radially central portion of the upper head 34b. The upper inner cylindrical portion 36 is mounted on a lower inner cylindrical portion 37 formed in the central portion of the burner body 33 in an inserted state. Inside the lower inner cylinder part 37 and the upper inner cylinder part 36, the pot bottom temperature sensor 13 is erected so as to penetrate therethrough. A ring temperature sensor 15 for detecting the temperature of the burner ring 31 is provided near the burner 30 .

A large number of burner holes are formed in the outer periphery of the burner head 34 in the circumferential direction, and these burner holes are divided into three layers in the height direction. That is, the burner head 34 is provided with a number of first burner holes 38 arranged in the uppermost layer in the circumferential direction and a number of second burner holes 39 arranged in the middle layer in the circumferential direction. A large number of third flame holes 40 are formed in the boundary with the surface 35 in a circumferential direction. The first burner hole 38 and the second burner hole 39 constitute a so-called parent burner, and the third burner hole 40 constitutes a so-called child burner.

The third flame hole 40 is formed by a plurality of radial grooves on the lower surface of the lower head 34 a contacting the upper surface of the annular surface 35 .

The outer diameter of the annular surface 35 is the outer end of the groove for forming the third burner hole 40 of the burner head 34 and the burner head 34 in which the first burner hole 38 and the second burner hole 39 are formed. It is formed smaller than the outer diameter of the outer peripheral surface.

As shown in FIG. 6, the burner ring 31 is attached to the burner body 33 and covers the gap between the burner body 33 and the inner peripheral edge of the burner opening 6a in the top plate 6 from above. A first contact portion 41 is formed on the upper end of the inner peripheral surface of the burner ring 31 at a position slightly lower than the annular surface 35 of the burner body 33 and contacts the entire outer peripheral surface of the burner body 33 . Since the annular surface 35 of the burner body 33 has a smaller diameter than the outer peripheral surface of the burner head 34 as described above, the inner peripheral edge of the upper end portion of the burner ring 31 is radially inside the outer peripheral surface of the burner head 34 over the entire circumference. located in the direction of Therefore, when the burner 30 is viewed from above, the inner peripheral edge of the upper end portion of the burner ring 31 is hidden by the burner head 34 and cannot be visually recognized.

Further, as shown in FIG. 6, a stepped portion 42 is formed on the outer peripheral surface of the burner body 33, and the inner peripheral surface of the burner ring 31 is formed corresponding to the stepped portion 42 of the burner body 33 (preferably A second contact portion 43 is formed in close contact (over the entire circumference) to form a sealing surface .

As described above, according to the burner 30 shown as a reference example, since the first contact portion 41 is formed at the upper end portion of the burner ring 31, for example, when cooking, the heat from the cooking vessel W such as a pan is removed. Even if the boiled-over juice flows down along the outer peripheral surface of the burner head 34, the boiled-over juice is suppressed from going toward the inner peripheral edge of the upper end portion of the burner ring 31.例文帳に追加

Moreover, since the seal surface is formed by the second contact portion 43 on the inner peripheral surface of the burner ring 31, spilled juice may enter between the second contact portion 43 and the burner body 33 by any chance. However, the spilled juice is prevented from flowing down below the second contact portion 43 . Therefore, the flow of boiled-over juice into the inside of the stove body 5 is extremely reduced, the inside of the stove body is kept clean, and the maintenance work such as cleaning the inside of the stove body 5 can be reduced.

Furthermore, in the burner 30, as shown in FIG. 1, the combustion control section 3a of the controller 3 controls the amount of combustion according to the temperature detected by the ring temperature sensor 15, thereby suppressing an excessive temperature rise of the burner ring 31. Therefore, it is possible to prevent the spilled juice from being burnt or scorched.

DESCRIPTION OF SYMBOLS 1... Gas stove, 2, 30... Burner (gas burner), 3a... Combustion control part (combustion control device), 5... Stove main body, 6... Top plate, 6a... Opening for burner, 15... Ring temperature sensor, 17, 31... Burner ring 19, 33 Burner body 20, 34 Burner head 22, 33a, 33b Distribution chamber 26, 38, 39, 40 Flame hole 27 Inner peripheral ridge (inner peripheral edge), 41... First contact portion (inner peripheral edge).

Claims (3)

A stove body having a gas burner and having an open top, a top plate covering the upper surface of the stove body, a burner opening formed in the top plate for exposing the gas burner, and the burner opening and the gas burner. A gas stove comprising a burner ring covering a gap formed between
The gas burner comprises a burner body in which a fuel gas distribution chamber is formed, and a burner head mounted on the burner body and forming a large number of flame holes between the burner body and the burner head,
The burner ring is located radially inward from the outer end of the lower end surface of the outer peripheral wall in which a large number of radially penetrating grooves are formed in the burner head, and the burner head of the burner body is mounted thereon. with an inner peripheral edge located radially inward from the outer edge of the mounting surface;
The inner peripheral edge of the burner ring is interposed between the burner body and the burner head and positioned inside the flame hole,
A gas stove according to claim 1 , wherein the upper end of the burner ring on the inner peripheral side is formed with a tapered surface that gradually descends radially outward . 2. The gas stove according to claim 1 , wherein the inner peripheral edge of said burner ring is in contact with said burner body over its entire circumference to form a sealing surface . a ring temperature sensor for detecting the temperature of the burner ring; and combustion for reducing the amount of combustion of the gas burner when the temperature detected by the ring temperature sensor reaches a preset temperature for preventing the spilled juice from burning or non-sticking . 3. The gas stove according to claim 1, further comprising a control device.

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