JP2021021556A - Gas cooking stove - Google Patents

Abstract

To hold a pot bottom abutment plate 61 at a retraction position lower than a cooking container mount face 3a of a trivet 3 without using an actuator at a normal time, in a gas cooking stove comprising a cooking stove burner 2 which heats a cooking container mounted over the trivet 3 on a top plate 1, and a pot bottom temperature sensor 6 including the pot bottom abutment plate 61 which can be abutted to a bottom face of the cooking container and is energized upward by energization means 63.SOLUTION: A burner head part 21 and the pot bottom abutment plate 61 include a head-side abutment part 21a and a sensor-side abutment part 61a which are abutted to each other when the pot bottom abutment plate 61 is moved down to a retraction position. Between the head-side abutment part 21a and the sensor-side abutment part 61a, one abutment part is at least partially constituted of a permanent magnet 7 and the other abutment part is attracted to the permanent magnet 7, thereby holding the pot bottom abutment plate 61 at the retraction position.SELECTED DRAWING: Figure 2

Description

The present invention is capable of contacting a stove burner having an annular burner head portion having a plurality of flame openings on the outer peripheral surface for heating the cooking container placed on the trivet on the top plate and the bottom surface of the cooking container. Pot bottom temperature having a pot bottom contact plate, a temperature detecting element for detecting the temperature of the pot bottom contact plate, and an urging means for urging the pot bottom contact plate so as to project upward from the cooking container mounting surface of the trivet. Regarding a gas stove equipped with a sensor.

In this type of gas stove, when the cooking container is not placed on the trivet, the pot bottom contact plate of the pot bottom temperature sensor projects upward from the cooking container mounting surface of the trivet. Therefore, when the cooking container is placed on the trivet by shifting it from the side, the movement of the cooking container is hindered by the pot bottom contact plate, which deteriorates usability.

Therefore, conventionally, according to Patent Document 1, a gas stove is also known in which a holding means capable of holding a pot bottom contact plate at a retracted position below the cooking container mounting surface of the trivet against the urging force of the urging means is provided. ing. This holding means includes an electric actuator that moves the pot bottom contact plate up and down. Then, when the fire extinguishing operation of the stove burner is performed, the actuator is driven to lower and hold the pot bottom contact plate to the retracted position, and when the ignition operation of the stove burner is performed, the actuator is driven in the opposite direction. Then, the pot bottom contact plate is raised, and the pot bottom contact plate is brought into contact with the bottom surface of the cooking container on the trivet by the urging force of the urging means.

However, in the above-mentioned conventional example, since it is necessary to control the actuators constituting the holding means and the actuators, the cost is high, and the actuators consume electric power, so that the request for power saving cannot be met. ..

JP-A-2017-67333

In view of the above points, the present invention prevents the movement of the cooking container from being hindered by the pot bottom contact plate and impairs usability, and also makes it possible to meet the demand for cost reduction and power saving. The challenge is to provide.

The present application is a stove burner having an annular burner head portion having a plurality of flame openings on the outer peripheral surface for heating a cooking container placed on a trivet on a top plate, and a pot bottom capable of contacting the bottom surface of the cooking container. A pot bottom temperature sensor having a contact plate, a temperature detecting element for detecting the temperature of the pot bottom contact plate, and an urging means for urging the pot bottom contact plate so as to protrude upward from the cooking container mounting surface of the trivet. It is premised that the gas stove is provided with a holding means capable of holding the pot bottom contact plate at a retracted position below the cooking container mounting surface of the trivet against the urging force of the urging means.

Then, in order to solve the above-mentioned problems, the first invention of the present application is to contact the burner head portion and the pot bottom contact plate with each other when the pot bottom contact plate is lowered to the retracted position and the sensor. A side contact portion is provided, and at least a part of one contact portion between the head side contact portion and the sensor side contact portion is composed of a permanent magnet, and the head side contact portion and the sensor side contact portion are provided. A feature of the present invention is that the holding means is configured so that the pot bottom contact plate is held in the retracted position by attracting the other contact portion to the permanent magnet, and the second invention of the present application is urging. The means is composed of a shape memory alloy spring that expands as the temperature rises, and at room temperature, the shape memory alloy spring contracts to lower the pot bottom contact plate to the retracted position, and the shape memory alloy spring holds the means. Is characterized in that.

According to the first invention, the pot bottom contact plate is always held in the retracted position by the attractive force of the permanent magnet, and after the stove burner is ignited, the attractive force of the permanent magnet is thermally demagnetized to attach an urging means. Below the force, the pot bottom contact plate rises from the retracted position and comes into contact with the bottom of the cooking container on the trivet. Further, according to the second invention, the pot bottom contact plate is always held in the retracted position by the contraction of the shape memory alloy spring, and after the stove burner is ignited, the shape memory alloy spring expands due to the temperature rise. The pot bottom contact plate rises from the retracted position and comes into contact with the bottom of the cooking container on the trivet. Therefore, in both the first invention and the second invention, since the pot bottom contact plate is always held in the retracted position, it is possible to prevent the movement of the cooking container from being hindered by the pot bottom contact plate and deteriorating usability. it can. Further, since the actuator and its control as in the conventional example are not required and power is not consumed, it is possible to meet the demand for cost reduction and power saving. Further, while the burner head portion and the pot bottom contact plate are hot, the pot bottom contact plate does not descend to the retracted position. Therefore, after the fire of the stove burner is extinguished, it is possible to visually determine whether or not the burner head portion and the pot bottom contact plate are hot from the position of the pot bottom contact plate.

Further, in the first invention, the portion of the other contact portion that is attracted to the permanent magnet may be formed of a heat-sensitive magnetic member. If a heat-sensitive magnetic member having a relatively low Curie temperature such as temperature-sensitive ferrite is used, the heat-sensitive magnetic member changes to a normal magnetic material at a relatively low temperature even if the permanent magnet is not heated until it is thermally demagnetized. Therefore, it is no longer attracted to the permanent magnet, and the pot bottom contact plate rises from the retracted position due to the urging force of the urging means. Therefore, it is possible to shorten the waiting time from the ignition of the stove burner to the contact of the pot bottom contact plate with the bottom surface of the cooking container on the trivet.

In the first invention, a temperature sensor for detecting the temperature of the permanent magnet is provided, and a control for limiting the combustion amount of the controller based on the detected temperature of the temperature sensor so that the temperature of the permanent magnet does not exceed the Curie temperature. It is desirable to do. According to this, it is possible to prevent the permanent magnet from exceeding the Curie temperature, and it is possible to stabilize the performance.

By the way, when the stove burner is not used, the flame mouth of the stove burner is spilled from a cooking container placed on another trivet adjacent to the trivet that surrounds the stove burner, causing clogging of the flame mouth. There is. Therefore, it is desirable that the outer diameter of the pot bottom contact plate is larger than the outer diameter of the burner head portion, and a tubular eaves extending downward is vertically provided on the outer peripheral edge of the pot bottom contact plate. According to this, when the stove burner is not in use, the flame port of the stove burner is covered from above by the tubular eaves when the pot bottom contact plate is lowered to the retracted position. It is possible to prevent the boiling spill from the placed cooking container from being caught in the flame mouth. In addition, when using the stove burner, the tubular eaves can prevent spills from the cooking container on the trivet that surrounds the stove burner from hitting the flame opening of the stove burner.

The perspective view of the main part of the gas stove of 1st Embodiment of this invention. (A) Cutting side view of the gas stove bottom contact plate of the first embodiment lowered to the retracted position, (b) Cutting side surface of the gas stove bottom contact plate of the first embodiment raised from the retracted position. Figure. The cut side view in the state where the pot bottom contact plate of the gas stove of 2nd Embodiment was lowered to the retracted position. (A) A cut side view of the gas stove bottom contact plate of the third embodiment lowered to the retracted position, and (b) a cut side view of the gas stove bottom contact plate of the third embodiment raised from the retracted position. Figure.

With reference to FIGS. 1 and 2, the gas stove according to the embodiment of the present invention includes a stove burner 2 having an annular burner head portion 21 exposed on the top plate 1 through a burner opening 11 opened in the top plate 1. ing. A trivet 3 is installed on the top plate 1 so as to surround the burner head portion 21. Then, the cooking container placed on the trivet 3 is heated by the stove burner 2. The trivet 3 is composed of a ring-shaped trivet frame 31 and a plurality of trivet claws 32 radially fixed to the trivet frame 31, and a cooking container is placed on the upper edge of these trivet claws 32. Further, on the top plate 1, a burner ring 12 that covers the gap between the peripheral edge of the burner opening 11 and the burner head portion 21 from above is placed.

The stove burner 2 has a mixing pipe portion 22 located under the top plate 1 and an inner and outer double tubular burner body portion 23 that rises from the downstream end of the mixing pipe portion 22 and is inserted into the burner opening 11. A burner head portion 21 made of an aluminum alloy is provided on the burner body portion 23. A plurality of flame ports 24 are provided on the outer peripheral surface of the burner head portion 21 at intervals in the circumferential direction, and the mixing is supplied from the mixing pipe portion 22 to the burner head portion 21 via the burner body portion 23. Qi erupts from the burner 24 and burns. Further, the burner head portion 21 is provided with an eaves portion 211 that projects outward in the radial direction from one location around the burner head portion 21. The ignition electrode 4 is arranged at a position covered by the eaves 211, and a thermocouple 5 for flame detection is further arranged in the vicinity of the ignition electrode 4.

The gas stove further includes a pot bottom temperature sensor 6 inserted in a space surrounded by the burner head portion 21. The pot bottom temperature sensor 6 includes a pot bottom contact plate 61 capable of contacting the bottom surface of the cooking container placed on the trivet 3, a temperature detecting element 62 for detecting the temperature of the pot bottom contact plate 61, and a pot bottom contact plate 61. As shown in FIG. 2B, it has an urging means 63 that urges the trivet 3 so as to protrude upward from the cooking container mounting surface 3a. When the cooking container is placed on the trivet 3, the pot bottom contact plate 61 comes into contact with the bottom surface of the cooking container by the urging force of the urging means 63, and the temperature of the bottom surface of the cooking container is defined as the temperature of the pot bottom contact plate 61. It can be detected at 62.

In the space surrounded by the burner head portion 21, a fixed cylinder 64, which is a part of the pot bottom temperature sensor 6, is erected. Then, a movable cylinder 611 slidably externally inserted into the fixed cylinder 64 is vertically installed on the lower surface of the pot bottom contact plate 61, and the pot bottom contact plate 61 is supported so as to be vertically movable by using the fixed cylinder 64 as a guide. I am trying to do it. An infrared detection element is arranged as a temperature detection element 62 on the bottom of the fixed cylinder 64, and detects the temperature of the pot bottom contact plate 61 in a non-contact manner. A temperature detecting element such as a thermos may be attached to the lower surface of the pot bottom contact plate 61. Further, a coil spring is interposed between the upper end of the fixed cylinder 64 and the pot bottom contact plate 61 as an urging means 63.

Further, in the present embodiment, the pot bottom contact plate 61 can be held at the retracted position shown in FIG. 2A below the cooking container mounting surface 3a of the trivet 3 against the urging force of the urging means 63. A holding means is provided. This point will be described in detail below.

The burner head portion 21 and the pot bottom contact plate 61 are provided with a head side contact portion 21a and a sensor side contact portion 61a that come into contact with each other when the pot bottom contact plate 61 is lowered to the retracted position. Here, the outer diameter of the pot bottom contact plate 61 is larger than the outer diameter of the burner head portion 21. The outer peripheral portion of the upper surface of the burner head portion 21 is designated as the head-side contact portion 21a, and the portion of the pot bottom contact plate 61 facing the head-side contact portion 21a is designated as the sensor-side contact portion 61a. Further, the pot bottom contact plate 61 is made of a magnetic material such as ferritic stainless steel, and the head side contact portion 21a is composed of an annular permanent magnet 7 embedded in the upper surface of the burner head portion 21. According to this, the holding means is configured so that the sensor-side contact portion 61a is attracted to the permanent magnet 7 so that the pot bottom contact plate 61 is held in the retracted position.

According to the present embodiment, the pot bottom contact plate 61 is always held in the retracted position against the urging force of the urging means 63 by the attractive force of the permanent magnet 7. Therefore, it is possible to prevent the movement of the cooking container on the trivet 3 from being hindered by the pot bottom contact plate 61 and deteriorating usability. After igniting the stove burner 2, the permanent magnet 7 is heated, the attractive force of the permanent magnet 7 is less than the urging force of the urging means 63 due to thermal demagnetization, and the pot bottom contact plate 61 rises from the retracted position. It abuts on the bottom of the cooking container on the trivet 3. Further, since the actuator for moving the pot bottom contact plate 61 up and down and its control as in the conventional example are not required and power is not consumed, it is possible to meet the demand for cost reduction and power saving. Further, while the burner head portion 21 and the pot bottom contact plate 61 are hot, the pot bottom contact plate 61 does not descend to the retracted position. Therefore, after the fire of the stove burner 2 is extinguished, whether or not the burner head portion 21 and the pot bottom contact plate 61 are hot can be visually determined from the position of the pot bottom contact plate 61, and the burner head portion 21 and the pot bottom contact plate 61 can be visually determined. You can avoid inadvertently touching the stove while it is hot.

Further, in the present embodiment, the outer diameter of the pot bottom contact plate 61 is made larger than the outer diameter of the burner head portion 21 as described above, and further, a tubular eaves extending downward on the outer peripheral edge of the pot bottom contact plate 61. 612 is erected. According to this, when the stove burner 2 is not used, the flame port 24 of the stove burner 2 is covered from above by the tubular eaves portion 612 when the pot bottom contact plate 61 is lowered to the retracted position. Therefore, when the stove burner 2 is not used, it is possible to prevent the spillage from the cooking container placed on the other trivet adjacent to the trivet 3 surrounding the stove burner 2 from being applied to the flame port 24 of the stove burner 2. Further, when the stove burner 2 is used, the tubular eaves portion 612 can prevent the spillage from the cooking container on the trivet 3 surrounding the stove burner 2 from being applied to the flame port 24 of the stove burner 2. If the tubular eaves 612 is provided with a taper that expands in diameter downward, it is possible to more effectively prevent the flame port 24 from being boiled over.

By the way, as the permanent magnet 7, neodymium magnet (Curie temperature about 320 ° C.), ferrite magnet (Curie temperature about 460 ° C.), alnico magnet (Curie temperature about 850 ° C.), samarium-cobalt magnet (Curie temperature about 800 ° C.), etc. Can be used. Here, when a neodymium magnet or a ferrite magnet having a relatively low Curie temperature is used as the permanent magnet 7, a temperature sensor (not shown) for detecting the temperature of the permanent magnet 7 is provided, and the temperature of the permanent magnet 7 is equal to or higher than the Curie temperature. It is desirable to perform control to limit the combustion amount of the control burner 2 based on the temperature detected by the temperature sensor, specifically, control to reduce the combustion amount of the control burner 2 or extinguish the fire. According to this, it is possible to prevent the permanent magnet 7 from exceeding the Curie temperature, and it is possible to stabilize the performance. Although it is possible to directly detect the temperature of the permanent magnet 7, the temperature of the permanent magnet 7 may be indirectly detected by a temperature sensor such as a thermistor attached to the burner head portion 21.

Next, the second embodiment shown in FIG. 3 will be described. The basic structure of the second embodiment is not particularly different from that of the first embodiment, and the same members and parts as those of the first embodiment are designated by the same reference numerals as described above. The difference from the first embodiment of the second embodiment is that the pot bottom contact plate 61 is made of a non-magnetic material such as austenitic stainless steel, and the sensor side contact portion 61a is embedded in the lower surface of the pot bottom contact plate 61. It is composed of an annular heat-sensitive magnetic member 8.

If a heat-sensitive magnetic member 8 having a relatively low Curie temperature such as temperature-sensitive ferrite is used, the heat-sensitive magnetic member 8 is a normal magnetic material at a relatively low temperature even if the permanent magnet 7 is not heated until it is thermally demagnetized. The pot bottom contact plate 61 rises from the retracted position by the urging force of the urging means 63 without being attracted to the permanent magnet 7. Therefore, it is possible to shorten the waiting time from the ignition of the stove burner 2 to the contact of the pot bottom contact plate 61 with the bottom surface of the cooking container on the trivet 3.

Finally, the third embodiment shown in FIG. 4 will be described. The basic structure of the third embodiment is not particularly different from that of the first embodiment, and the same members and parts as those of the first embodiment are designated by the same reference numerals as described above. The difference from the first embodiment of the third embodiment is that the urging means 63 for urging the pot bottom contact plate 61 upward is extended by increasing the temperature without providing the permanent magnet 7 of the first embodiment. It is composed of a shape memory alloy spring 9. Then, at room temperature, as shown in FIG. 4A, the shape memory alloy spring 9 contracts to lower the pot bottom contact plate 61 to the retracted position, and the shape memory alloy spring 9 provides a holding means. It is designed to be configured.

According to the third embodiment, after the stove burner 2 is ignited, the shape memory alloy spring 9 is stretched due to the temperature rise, and as shown in FIG. 4B, the pot bottom contact plate 61 rises from the retracted position. , Contact the bottom of the cooking container on the trivet 3. Then, also in the third embodiment, the same effect as that of the first embodiment described above can be obtained.

Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited thereto. For example, in the first and second embodiments, the head-side contact portion 21a is composed of an annular permanent magnet 7 embedded in the outer peripheral portion of the upper surface of the burner head portion 21, but the outer peripheral portion of the upper surface of the burner head portion 21. It is also possible to embed the permanent magnets in a plurality of places so as to be scattered so that a part of the head-side contact portion 21a is composed of the permanent magnets. Further, it is also possible to embed a permanent magnet in a portion of the pot bottom contact plate 61 near the outer peripheral portion of the lower surface, and at least a part of the sensor side contact portion 61a may be composed of the permanent magnet. The portion of the contact portion 21a that is attracted to the permanent magnet may be formed of a heat-sensitive magnetic member embedded in the upper surface of the burner head portion 21.

1 ... top plate, 2 ... stove burner, 21 ... burner head part, 21a ... head side contact part, 24 ... flame port, 3 ... Gotoku, 3a ... cooking container mounting surface, 6 ... pot bottom temperature sensor, 61 ... pot bottom Contact plate, 61a ... Sensor side contact portion, 62 ... Temperature detection element, 63 ... Biasing means, 7 ... Permanent magnet, 8 ... Heat-sensitive magnetic member, 9 ... Shape memory alloy spring.

Claims (5)

A stove burner with an annular burner head with multiple flame openings on the outer peripheral surface that heats the cooking container placed on the trivet on the top plate, and a pot bottom contact plate that can contact the bottom of the cooking container. A pot bottom temperature sensor having a temperature detecting element for detecting the temperature of the pot bottom contact plate and an urging means for urging the pot bottom contact plate so as to protrude upward from the cooking container mounting surface of the trivet. It ’s a gas stove,
In the case where the pot bottom contact plate is provided with a holding means capable of holding the pot bottom contact plate at a retracted position below the cooking container mounting surface of the trivet against the urging force of the urging means.
The burner head portion and the pot bottom contact plate are provided with a head side contact portion and a sensor side contact portion that come into contact with each other when the pot bottom contact plate is lowered to the retracted position, and the head side contact portion and the sensor side are provided. At least a part of one contact portion with the contact portion is composed of a permanent magnet, and the other contact portion between the head side contact portion and the sensor side contact portion is attracted to the permanent magnet to hit the bottom of the pot. A gas stove characterized in that a holding means is configured so that the contact plate is held in the retracted position. The gas stove according to claim 1, wherein the portion of the other contact portion that is attracted to the permanent magnet is composed of a heat-sensitive magnetic member. A temperature sensor for detecting the temperature of the permanent magnet is provided, and control is performed to limit the combustion amount of the stove burner based on the temperature detected by the temperature sensor so that the temperature of the permanent magnet does not exceed the Curie temperature. The gas stove according to claim 1 or 2. A stove burner with an annular burner head with multiple flame openings on the outer peripheral surface that heats the cooking container placed on the trivet on the top plate, and a pot bottom contact plate that can contact the bottom of the cooking container. A pot bottom temperature sensor having a temperature detecting element for detecting the temperature of the pot bottom contact plate and an urging means for urging the pot bottom contact plate so as to protrude upward from the cooking container mounting surface of the trivet. It ’s a gas stove,
In the case where the pot bottom contact plate is provided with a holding means capable of holding the pot bottom contact plate at a retracted position below the cooking container mounting surface of the trivet against the urging force of the urging means.
The urging means is composed of a shape memory alloy spring that expands as the temperature rises. At room temperature, the shape memory alloy spring contracts and the pot bottom contact plate is lowered to the retracted position. A gas alloy characterized in that a holding means is configured by. The outer diameter of the pot bottom contact plate is larger than the outer diameter of the burner head portion, and a tubular eaves extending downward is vertically provided on the outer peripheral edge of the pot bottom contact plate. The gas stove according to any one of 4.

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