JP2020139714A - Gas cooking stove - Google Patents

Abstract

To provide a gas cooking stove which can inhibit a soup from boiling over a space between a burner ring and a gas burner.SOLUTION: A gas cooking stove 1 includes a burner ring 17 which covers a gap formed between a burner opening 6a of a top plate 6 and a gas burner 2. The gas burner 2 includes: a burner body 19 in which a fuel gas distribution chamber 22 is formed; and a burner head 20 which is placed on the burner body 19 and forms a number of burner ports 26. The burner ring 17 includes an inner peripheral end edge 27 located at the radial inner side of an outer end of each burner port 26.SELECTED DRAWING: Figure 3

Description

The present invention relates to a gas stove.

Generally, in a gas stove, the gas burner is exposed from the 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), but in order to prevent spilled juice and dust from entering the inside of the stove body through this gap, the above gap A burner ring is provided to cover the surface (see Patent Document 1).

This type of burner ring is a donut-shaped disk formed in a tapered shape, the outer diameter of which is formed larger than the opening for the burner.

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

Japanese Unexamined Patent Publication No. 62-272024

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

In order to achieve such an object, the present invention provides a stove body having a gas burner and an open upper portion, a top plate covering the upper surface of the stove body, and a burner formed on the top plate to expose the gas burner. In a gas stove provided with an opening and a burner ring covering a gap formed between the burner opening and the gas burner, the gas burner includes a burner body having a fuel gas distribution chamber formed therein and the burner body. It comprises a burner head that is placed on top and forms a large number of flame holes with the burner body, and the burner ring is an inner peripheral edge located radially inward from the outer end of the flame hole. It is characterized by having.

In the gas stove of the present invention, the inner peripheral edge of the burner ring is located radially inward from the outer edge of the flame hole of the gas burner. As a result, the spilled 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 spilled juice between the burner ring and the gas burner.

In the present invention, it is preferable that the inner peripheral edge of the burner ring has a shape that intervenes between the burner body and the burner head.

According to this, the boundary between the burner ring and the burner body is hidden under the burner head, so that the spilled juice does not infiltrate into the inside of the burner ring from the boundary between the burner ring and the burner body. be able to.

Further, in the gas stove of the present invention, a ring temperature sensor that detects the temperature of the burner ring and a combustion control device that reduces the combustion amount of the gas burner when the detection temperature of the ring temperature sensor reaches a predetermined temperature. It is preferable to prepare.

Since the burner ring is in contact with the burner body, the heat of the burner body is transferred when the gas burner is burned, and the temperature becomes higher than that in the case where the burner body is not in contact with the burner body. When the burner ring becomes hot, the burn-in (burnt) of the spilled juice or the like becomes dirty and sticks, and it may be difficult to remove (peel) from the burner ring.

Therefore, in the present invention, the burning temperature detected by the ring temperature sensor is set in advance based on a predetermined temperature (for example, a temperature at which the boiling temperature or the burning temperature may occur). When the prevention temperature or the non-stick temperature is reached, the combustion control device reduces the combustion amount of the gas burner (including the combustion stop).

According to this, it is possible to suppress seizure (burning) of the spilled juice and the like adhering to the burner ring, and it is possible to easily remove (peeling) the spilled juice and the like from the burner ring.

The figure which shows typically the structure of the gas stove which is an embodiment of this invention. Explanatory side view of the gas burner in this embodiment. Explanatory sectional view which enlarges and shows the main part of the burner for a stove of FIG. The flowchart which shows an example of the control by a controller. Explanatory side view of another stove burner that can be adopted in this embodiment. Explanatory sectional view which shows the main part of the burner for a stove of FIG. 5 in an enlarged manner.

Embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the gas stove 1 of the present embodiment gives 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 being operated by a user. It is provided with an operation panel 4 including a group of switches for performing the operation. The burner 2 and the controller 3 are housed in a box-shaped stove body 5 whose part is shown by a virtual line in the drawing. The open upper surface of the stove body 5 is closed by the top plate 6.

Fuel gas is supplied to the burner 2 via the gas supply pipe 7. The gas supply pipe 7 includes a main electromagnetic valve 8 that opens and closes the gas supply pipe 7, a flow rate control valve 9 that adjusts the flow rate of fuel gas flowing through the gas supply pipe 7, and a flow rate control valve 9 when the valve is closed. An orifice 10 is provided to ensure a minimum flow rate of fuel gas. The original solenoid valve 8 is opened by energization under the control of the controller 3 and closed by stopping energization. The flow rate control valve 9 is opened and closed by the motor 11. The motor 11 is controlled by a combustion control unit 3a functionally provided in the controller 3. The combustion control unit 3a adjusts the opening degree of the flow rate control valve 9 via the motor 11.

A burner opening 6a is provided on the top plate 6. The 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 that comes into contact with the bottom of the cooking container W when the cooking container W such as a pot is placed on the trivet 12 is provided. The pot bottom temperature sensor 13 detects the temperature of the bottom of the cooking container W heated by the burner 2 and outputs a signal indicating the detected temperature.

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

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

Further, as shown in FIGS. 2 and 3, the burner 2 includes a cover plate 21 that covers the upper part of the burner head 20 with a predetermined gap, and a burner that expands radially outward from the outer circumference of the burner body 19. It has a ring 17. The pot bottom temperature sensor 13 penetrates the cover plate 21 and projects upward.

A gas nozzle (not shown) faces the upstream end of the mixing pipe portion 18, and the fuel gas ejected from the gas nozzle and the primary air sucked from the upstream end of the mixing pipe portion 18 due to the jet of the fuel gas are mixed. A mixed gas is generated by mixing in the pipe portion 18.

As shown in FIG. 3, an annular distribution chamber 22 communicating with the mixing pipe portion 18 is formed inside the burner body 19. Further, the burner body 19 is provided with an annular surface 23 provided so as to cover the upper portion of the distribution chamber 22. The annular surface 23 is formed in an annular shape so as to be inclined upward from the inside to the outside.

The burner head 20 is provided with an inner cylinder portion 24 formed in a tubular shape and extending vertically downward in the central portion, and the inner cylinder portion 24 closes the inside of the distribution chamber 22 of the burner body 19. The pot bottom temperature sensor 13 supported inside the stove body 5 by a support member (not shown) penetrates and stands inside the inner cylinder portion 24.

Further, an outer peripheral wall 25 projecting downward is integrally provided at the outer peripheral end of the burner head 20. The lower end surface of the outer peripheral wall 25 is in contact with the upper surface of the annular surface 23. As a result, the burner head 20 is provided in a state of being 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 that radiate along the radial direction of the burner head 20. The lower end side of each groove is open, and the lower end surface of the outer peripheral wall 25 abuts on the annular surface 23, so that a large number of flame holes 26 having the annular surface 23 as the lower surface are formed on 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. A tapered surface that gradually descends outward in the radial direction is formed at the upper end of the burner ring 17, and an inner peripheral ridge 27 that continuously protrudes inward in the radial direction and extends in the circumferential direction is integrated with the inner peripheral side thereof. Is formed in.

The lower surface of the inner peripheral ridge 27 is in contact with the upper surface of the outer end portion 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 sealing surface, and the burner body 19 and the burner are formed. 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 forms a part of the bottom of the flame hole 26, the inner peripheral edge of the inner peripheral ridge 27 at the upper end of the burner ring 17 covers the entire circumference. It is located radially inward with respect to the outer peripheral surface of the burner head 20. For this reason, when the burner 2 is viewed in a plan view, 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 spilled juice from a cooking container such as a pot flows down from above the flame hole 26 during cooking, the spilled juice not only flows outward due to the tapered surface at the upper end of the burner ring 17. It is extremely unlikely that the spilled juice will reach the inner peripheral edge of the inner peripheral ridge 27 located radially inward and downward with respect to the outer peripheral edge of the burner head 20.

Moreover, the lower surface of the inner peripheral ridge 27 of the burner ring 17 abuts on the upper surface of the outer end portion of the annular surface 23 to form a sealing surface. Therefore, even if the spilled juice gets into the space between the burner ring 17 and the burner body 19, it does not flow down below the sealing surface formed by the inner peripheral ridges 27 of the burner ring 17.

Therefore, it is possible to prevent the spilled juice from entering the inside of the stove body 5 as much as possible through the space between the burner ring 17 and the burner body 19, and the inside of the stove body 5 can be kept clean. Maintenance work can be reduced.

By the way, it is considered that the burner ring 17 is in contact with the burner body 19, so that the heat from the burner 2 is transferred and the temperature becomes relatively high. When the spilled juice adheres to the place where the burner ring 17 is excessively heated, the spilled juice is burned on the surface of the burner ring 17 and becomes dirty. Such dirt sticks to the burner ring 17, and it is difficult to remove it even if it is cleaned.

The temperature of the burner ring 17 rises according to the magnitude and time of the thermal power of the burner 2. In order to detect the temperature of the burner ring 17, the gas stove 1 of the present embodiment includes a ring temperature sensor 15. The ring temperature sensor 15 becomes excessive due to continuous large heating power of the burner 2, cooking using a pan having a large radiation, abnormal combustion due to erroneous setting of the burner head 20, and the like. Detect high temperatures. In the present embodiment, the ring temperature sensor 15 uses a non-contact sensor such as an infrared sensor, but it may be a contact type sensor.

The combustion control unit 3a of the controller 3 controls to reduce the thermal power (combustion amount) of the burner 2 in response to an increase in the detection temperature of the ring temperature sensor 15.

An example of control by the combustion control unit 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 (ON operation 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. The valve is opened, and the flow rate control valve 9 is opened in STEP3. As a result, the burner 2 starts burning.

Next, the combustion control unit 3a proceeds to STEP 4 to monitor the detected temperature of the ring temperature sensor 15. That is, in STEP 4, when the detection 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 rate 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 thermal power (so-called low heat). The combustion control unit 3a returns from STEP 5 to STEP 4 and enters the thermal power monitoring state.

The temperature T is a seizure prevention temperature or a non-sticking temperature of the boiled spilled juice set in advance based on a temperature at which a seizure temperature or a scorching temperature of the boiled spilled juice may occur, and is set to 200 ° C. in this embodiment. However, the temperature T is not limited to 200 ° C., and is appropriately set depending on the material and shape of the burner ring 17.

When the process progresses from STEP 4 to STEP 5, the thermal power of the burner 2 becomes smaller (the amount of combustion is reduced), so that the excessive temperature rise of the burner ring 17 is suppressed. As a result, it is possible to prevent seizure and scorching when the spilled juice adheres to the burner ring 17, and it is possible to reduce the time and effort required for cleaning.

Further, when the detection temperature of the ring temperature sensor 15 is equal to or lower than the temperature T in STEP 4, the process proceeds to STEP 6. In STEP 6, the state of the flow rate control valve 9 at the time of proceeding to STEP 4 is maintained and the process proceeds to STEP 7. In STEP 7, if the burner 2 is not controlled by the temperature control mode, the process proceeds to STEP 8, and if the burner 2 is controlled by the temperature control mode, the process proceeds to STEP 10.

If the fire extinguishing operation is not performed in STEP8, the process returns to STEP4. When the fire extinguishing operation is performed in STEP 8, the process proceeds to STEP 9 to close the main solenoid valve 8 and the use of the stove is completed.

Further, when the process proceeds from STEP 7 to STEP 10, if the flow rate control valve 9 is opened, the process returns to STEP 7 and the control by the temperature control mode is continued. Here, when the process proceeds to STEP 10, if the flow rate control valve 9 is closed, the process proceeds to STEP 11. If the detection temperature gradient of 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 detection temperature gradient of the ring temperature sensor 15 tends to rise in STEP 11, the temperature control mode error is notified in STEP 12, and the main solenoid valve is closed in STEP 9, forcibly pressing the stove. End use.

As described above, the combustion control unit 3a of the controller 3 controls the thermal power of the burner 2 based on the detection temperature of the ring temperature sensor 15, so that even if the heat generated by the combustion of the burner 2 is transferred to the burner ring 17, the burner It is possible to suppress an excessive temperature rise of the ring 17.

Next, in the gas stove 1 of the present embodiment, the configurations of the burner 30 and the burner ring 31 as modification examples will be described with reference to FIGS. 5 and 6. The configuration of the gas stove including the 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 pipe portion 32 and a second mixing pipe portion (not shown). A burner body 33 is connected to the first mixing pipe portion 32 and the second mixing pipe portion 32, and is exposed on the top plate 6 through the burner opening 6a of the top plate 6. A burner head 34 is detachably mounted on the burner body 33, and a burner ring 31 that expands outward in the radial direction is provided on the outer periphery of the burner body 33.

As shown in FIG. 6, the burner body 33 includes two distribution chambers 33a and 33b inside. An annular surface 35 is formed at the upper end of the portion of the burner body 33 that forms the so-called child burner. The annular surface 35 is formed in an annular shape so as to be inclined 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 to the upper part of the lower head 34a. At the radial center portion of the upper head 34b, an upper inner tubular portion 36 formed in a tubular shape and extending vertically downward is formed. The upper inner cylinder portion 36 is mounted in an inserted state on the lower inner cylinder portion 37 formed in the central portion of the burner body 33. A pot bottom temperature sensor 13 penetrates and stands inside the lower inner cylinder portion 37 and the upper inner cylinder portion 36. Further, a ring temperature sensor 15 for detecting the temperature of the burner ring 31 is provided in the vicinity of the burner 30.

A large number of flame holes are formed on the outer periphery of the burner head 34 in the circumferential direction, and these flame holes are divided into three layers in the height direction. That is, the burner head 34 includes a large number of first flame holes 38 arranged in the circumferential direction in the uppermost layer and a large number of second flame holes 39 arranged in the circumferential direction in the intermediate layer, and is an annular shape of the burner body 33 as the lowermost layer. A large number of third flame holes 40 arranged in the circumferential direction are formed at the boundary with the surface 35. The first flame hole 38 and the second flame hole 39 form a so-called parent burner, and the third flame 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 34a abutting on the upper surface of the annular surface 35.

The outer diameter of the annular surface 35 is the outer diameter of the groove for forming the third flame hole 40 of the burner head 34, and the burner head 34 in which the first flame hole 38 and the second flame 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. At the upper end of the inner peripheral surface of the burner ring 31, a first contact portion 41 that contacts the entire outer peripheral surface of the burner body 33 is formed at a position slightly lower than the annular surface 35 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 within the radial direction of the outer peripheral surface of the burner head 34 over the entire circumference. Located in the direction. Therefore, when the burner 30 is viewed in a plan view, 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 step portion 42 is formed on the outer peripheral surface of the burner body 33, and the inner peripheral surface of the burner ring 31 corresponds to the step portion 42 of the burner body 33 (preferably). A second contact portion 43 that is in close contact (over the entire circumference) is formed, thereby forming a sealing surface. The first contact portion 41 corresponds to the inner peripheral edge of the present invention.

As described above, according to the burner 30 shown as a modified example, since the first contact portion 41 is formed at the upper end portion of the burner ring 31, for example, from the cooking container W such as a pot during cooking. Even if the spilled juice of No. 1 flows down along the outer peripheral surface of the burner head 34, the spilled juice is suppressed from going toward the inner peripheral edge of the upper end portion of the burner ring 31.

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

Further, also in the burner 30, as shown in FIG. 1, the combustion control unit 3a of the controller 3 controls the combustion amount according to the detection temperature of 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 burned or burnt.

1 ... Gas stove, 2, 30 ... Burner (gas burner), 3a ... Combustion control unit (combustion control device), 5 ... Stove body, 6 ... Top plate, 6a ... Burner opening, 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 an open upper portion, a top plate covering the upper surface of the stove body, a burner opening formed on the top plate to expose the gas burner, and a burner opening and the gas burner In a gas stove with a burner ring that covers the gap formed between them,
The gas burner includes a burner body in which a fuel gas distribution chamber is formed, and a burner head that is placed on the burner body and forms a large number of flame holes between the burner body.
The burner ring is a gas stove including an inner peripheral edge located radially inward with respect to the outer end of the flame hole. The gas stove according to claim 1, wherein the inner peripheral edge of the burner ring has a shape that intervenes between the burner body and the burner head. Claim 1 is characterized by comprising a ring temperature sensor for detecting the temperature of the burner ring and a combustion control device for reducing the combustion amount of the gas burner when the detection temperature of the ring temperature sensor reaches a predetermined temperature. Or the gas stove according to 2.