JP2007263507A - Cooking stove - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooking stove capable of determining whether a heated object is placed on a trivet or not with high accuracy though a structure is a simple. <P>SOLUTION: In this cooking stove comprising the trivet having a plurality of claw portions for placing the heated object in a state of projecting upward from an annular base, and a heated object detecting means for determining whether the heated object is placed on the trivet or not, leg-shaped bodies are projected downward from the base of the trivet, and receiving supporting members are disposed to receive and support lower end portions of the leg-shaped bodies. The trivet is constituted to change receiving load of the receiving supporting members receiving supporting the leg-shaped bodies by changing a placing state and a non-placing state of the heated object, and the heated object detecting means is constituted to detect the change of receiving load of the receiving supporting members receiving and supporting the leg-shaped bodies. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to five virtues provided with a plurality of claws for placing an object to be heated in a state of projecting upward from an annular substrate, and to detect whether an object to be heated is placed on the five virtues. The present invention relates to a stove provided with a heated object detection means.

  The stove has a configuration in which a heated object such as a pan is placed on the virtues and heated by heating means such as a gas burner, and whether or not the heated object is placed on the virtues by the heated object detection means. In such a stove, conventionally, the heated object detection means is capable of performing various processes for appropriately cooking based on the detection result. When the object to be heated is placed on the virtues, the expansion / contraction operation portion that is elastically biased upward so as to protrude upward from the upper end of the virtues comes into contact with the object to be heated downward. There has been a configuration in which a contact-type expansion / contraction operation mechanism that detects that an object to be heated is placed by moving and turning on a limit switch is provided (see Patent Document 1).

Another conventional example has the following configuration.
That is, as the heated object detection means, a plurality of heated object mounting claw parts in Gotoku are provided with a strain gauge for detecting distortion of the claw part, specifically, a detected value of the strain gauge, Based on the change of the resistance value, it is detected that the load applied to the claw portion of the virtues is changed by placing the object to be heated (for example, see Patent Document 2), and the object to be covered Piezoelectric elements that receive the bottom surface of the substrate and detect the pressure received from the bottom surface of the top plate on which the substrate of the five virtues is placed as a heated object detecting means are dispersedly arranged at intervals in the circumferential direction. In some cases, a plurality of devices are provided in a state so as to detect a change in the load applied to the five virtues when the object to be heated is placed (for example, see Patent Document 3).

JP 2005-188817 A JP 63-21419 A JP 2005-265221 A

  In the configuration described in Patent Document 1, it is configured to detect whether or not the heated object is placed in the five virtue by an expansion and contraction operation mechanism in which the heated object contacts and mechanically displaces. The operation mechanism is pushed and mechanically operated by contact with the object to be heated to detect the presence of the object to be heated, and thus has a disadvantage that the structure becomes complicated.

  On the other hand, as described in Patent Document 2 and Patent Document 3, the object to be heated is placed on the five virtues using a configuration that detects a change in load applied to the five virtues by placing the object to be heated. If it is detected whether or not it is done, it is possible to cope with a simpler structure than the above-mentioned telescopic operation mechanism.

  However, although the configuration described in Patent Document 2 is configured to detect distortion in the claw portion of the virtues that receives and supports the object to be heated, the virtues can be heated even if the object to be heated has a large load. It is necessary to reliably receive and support the mounting posture so that it does not become unstable, and the claw portion of Gotoku is generally configured in a form in which distortion is not likely to occur even when a heated object is placed. Therefore, the amount of strain detected by the strain gauge is small. In addition, the claw portion of the virtues provided with the strain gauge may be exposed to a flame formed by a gas burner as a heating means, but the atmosphere temperature of the strain gauge varies greatly depending on the size of the formed flame. There is also a possibility that a detection error due to a change in resistance value due to this will also occur, so the S / N (signal to noise) ratio will deteriorate, and the load applied to the five virtues due to the object to be heated will be placed Cannot be detected with high accuracy, and it may not be possible to accurately detect whether or not the object to be heated is placed on the five virtues.

  Moreover, since the structure described in Patent Document 3 is configured to detect the load by receiving the planar bottom surface of the substrate by the piezoelectric element, the load applied to the virtues is flat when the object to be heated is placed. It is received by each of the piezoelectric elements in a state of being distributed over a wide range of the bottom of the shape. As described above, since the load is detected in a state where the load applied to the five virtues is dispersed, it may not be possible to accurately detect whether or not the object to be heated is placed. In particular, if it is a light object to be heated, such as an empty pan in which no food is contained, it is difficult to detect whether the object to be heated is placed.

  An object of the present invention is to provide a stove capable of accurately detecting whether or not an object to be heated is placed on the five virtues while having a simple structure.

The stove according to the present invention has five virtues provided with a plurality of claws for placing an object to be heated in a state of protruding upward from an annular base body, and whether or not an object to be heated is placed on the five virtues. And a heated object detection means for detecting,
The first characteristic configuration is provided with a leg-like body projecting downward from the base of the five virtues, and a receiving support member for receiving and supporting a lower end portion of the leg-like body,
The five virtues are provided so that the receiving load of the receiving support member that receives and supports the leg-like body by changing between a placement state and a non-placement state of the object to be heated,
The heated object detecting means is configured to detect a change in the receiving load of the receiving support member that receives and supports the leg-shaped body.

  According to the first characteristic configuration, the receiving support member receives and supports the lower end portion of the leg-shaped body protruding downward from the base of the virtues, and the heated object detecting means receives and supports the leg-shaped body. The change in the receiving load of the receiving support member to be detected is detected. In other words, the receiving load of the receiving support member changes when the five virtues change between the placed state and the non-placed state of the object to be heated. A change in the load applied to the five virtues is detected by changing between an object placement state and a non-placement state.

  The heated object detecting means detects a change in the receiving load of the receiving support member and does not require a mechanical movable part, so that the structure becomes simple.

  In addition, since the receiving support member receives and supports the leg-shaped body, it is possible to concentrate the load applied to the virtues on the receiving support member with the leg-shaped body, and the heated object detecting means In this way, since it is configured to detect a change in the receiving load of the receiving support member that receives and supports the leg-like body to which the load of virtues is concentrated, the mass of the object to be heated is small. In addition, it is possible to accurately detect the change in the receiving load, and it is possible to accurately detect whether or not the object to be heated is placed on the five virtues.

  Therefore, it has become possible to provide a stove that can accurately detect whether or not an object to be heated is placed on the five virtues while having a simple structure.

  According to a second characteristic configuration of the present invention, in addition to the first characteristic configuration, the receiving support member is provided at a position below the top plate in a state of being separated from the top plate, Provided in a state extending toward the lower side of the top plate, and wherein the five virtues are configured to receive and support the leg-like body by changing between a mounted state and a non-mounted state of the object to be heated. It exists in the state which can be moved up and down with respect to the said top plate so that a receiving load may change.

  According to the second characteristic configuration, the leg-like body is provided in a state extending toward the lower side of the top plate covering the upper side of the stove, and the five virtues are provided in a state capable of moving up and down with respect to the top plate. The leg-shaped body in a state where the receiving load of the receiving support member is changed by changing between the mounted state and the non-mounted state of the object to be heated while positioning the base of the virtues on the top of the top plate It can receive and support.

  Further, since the receiving support member is provided at a position below the top plate in a state of being separated from the top plate, the receiving support member is heated to a high temperature due to the influence of the heating means for heating the object to be heated. The object to be heated detection unit can be provided in a state where it is difficult to receive heat from the top plate.

  Accordingly, the object to be heated detection means can accurately detect whether or not the object to be heated is placed on the five virtues in a state where the influence of heat is small.

  In addition to the first feature configuration or the second feature configuration, the third feature configuration of the present invention is configured such that the receiving support member can be deformed and deformed by receiving and supporting the leg-shaped body, and the heated object The detecting means is configured to detect a strain amount of the receiving support member in order to detect a change in receiving load when receiving and supporting the leg-shaped body.

According to the third characteristic configuration, the receiving support member can be received and supported in a state in which the load applied to the five virtues is concentrated on the leg-shaped body, so that the mass of the object to be heated is small. Even if it exists, it becomes possible to receive and support in a state in which the amount of distortion is made as large as possible.
And since the to-be-heated object detection means detects such a distortion amount of the receiving support member, it is possible to accurately detect a change in the receiving load when receiving and supporting the leg-shaped body. It becomes.

  According to a fourth feature configuration of the present invention, in addition to any one of the first feature configuration to the third feature configuration, the leg-shaped body is arranged evenly at intervals in the circumferential direction of the base of the five virtues. The number of the object to be heated is provided corresponding to each of the plurality of leg-like bodies, and the magnitude of the receiving load when receiving and supporting by the receiving support member It is in the point comprised so that it may detect.

  According to the fourth characteristic configuration, three or more leg-like bodies are provided in a state where the leg-like bodies are evenly arranged at intervals in the circumferential direction of the five virtue bases, and each leg-like body is received by a receiving support member. Will be supported. By configuring in this way, the entire load is received and supported by each of the receiving and supporting members while being uniformly supported by the plurality of legs. At that time, when the object to be heated is placed on the five virtues, the combined load of the object to be heated and the five virtues is accepted, and when the article to be heated is not placed on the five virtues, the load of the five virtues is accepted. Will be. That is, when the magnitudes of the receiving loads detected by the plurality of heated object detecting means are summed, the mass of the heated object can be obtained.

  Therefore, since it becomes possible to obtain the mass of the object to be heated, for example, when cooking, it can be used as a kitchen scale for detecting the mass of various materials, and it can be used as a cooking device. It becomes possible to improve.

  The fifth characteristic configuration of the present invention controls, in addition to any of the first characteristic configuration to the fourth characteristic configuration, a heating means for heating an object to be heated placed on the five virtues, and an operation of the heating means. An operation control means that performs the heating operation of the heating means, and the object to be heated is placed on the five virtues based on the detection result of the object detection means. If it is determined that the heated object is switched from the heated object present state to the heated object non-existing state in which the object to be heated is not placed in the five virtues, a heating amount lowering process for reducing the heating amount of the heating unit is performed. It is in the point which is comprised.

  According to the fifth feature, when the heating means is heating and heating the object to be heated, the object to be heated is placed on the five virtue based on the detection result of the object to be heated detection means. When it is determined that the object to be heated is switched from the state to be heated to the non-heated object in which the object to be heated is not placed in the five virtues, a heating amount lowering process for reducing the heating amount of the heating means is executed. Therefore, when the object to be heated is removed from Gotoku, it is possible to avoid the disadvantage that the heating means continues the wasteful heating operation with a large heating power.

  And since it is possible to accurately detect whether or not the object to be heated is placed in the five virtues by the object to be heated detection means, the state of the object to be heated has been switched from the state to be heated to the absence of the object to be heated. Can be accurately detected and the heating amount reduction process can be appropriately executed.

Hereinafter, an embodiment of a stove according to the present invention will be described based on the drawings.
As shown in FIG. 1, the stove has a flat top plate 1 having a circular heating opening 1a, a virtues 2 on which a heated object N such as a pan can be placed spaced above the opening 1a, Burner 3 as a heating means for heating an object to be heated N placed on Gotoku 2, control section 4 as an operation control means for controlling the operation of the burner 3, various instructions to the control section 4 by human operation The operation part 5 etc. which perform are comprised.

  The burner 3 is a Bunsen combustion type internal flame type burner, which is a gas nozzle 6 for ejecting a fuel gas G, and a mixing tube to which combustion air A is supplied by a suction action accompanying the ejection of the fuel gas G from the gas nozzle 6. 7 and an annular casing member 9 provided with a plurality of flame ports 8 for injecting the air-fuel mixture to the inner peripheral portion and supplied with the air-fuel mixture from the mixing pipe 7, etc., and the burner 3 includes the opening 1a It is located below and provided. As shown in FIG. 3, the virtues 2 have a configuration in which a plurality of claws 2B for placing an object to be heated are provided so as to protrude upward from the annular base 2A.

  In the burner 3, the mixture of the fuel gas G and the air A supplied from the mixing pipe 7 into the annular casing member 9 is ejected from the flame port 8 toward the center of the annular casing member 9 in a substantially horizontal direction. The mixture of the jetted fuel gas G and air A burns, and a flame F is formed upward through the opening 1a.

  An annular casing member of the burner 3 is provided with a fuel supply intermittent valve 10 for intermittently supplying the fuel gas G to the gas nozzle 6 and a fuel supply amount adjusting valve 11 for adjusting the supply amount of the fuel gas G to the gas nozzle 6. Below 9 is provided a juice tray 12 for receiving boiled food that has fallen through the opening 1a.

  A leg-like body 13 projecting downward from the annular base 2A of the five virtues 2 and a receiving support member 14 that receives and supports the lower end of the leg-like body 13 are provided. Further, the virtues 2 are provided so that the receiving load of the receiving support member 14 that receives and supports the leg-like body 13 by changing between the mounted state and the non-mounted state of the article N to be heated is provided. Yes.

  In addition, as shown in FIG. 1, FIG. 3, and FIG. 4, the leg-shaped body 13 is formed in a thin rod shape and is evenly arranged at intervals in the circumferential direction of the base 2A of the five virtues 2. Three are provided in a state, and are integrally formed so as to protrude from the base 2A. This leg-like body 13 is inserted through each of the three through holes 15 formed in the top plate 1 and penetrating in the vertical direction when the virtues 2 are mounted at predetermined positions on the top plate 1 for supporting the object to be heated. When the virtues 2 are placed at a predetermined placement position, they are provided in a state extending from the base 2A toward the lower side than the top plate 1.

  As shown in FIG. 3 and FIG. 4, three receiving support members 14 are provided corresponding to each of the three leg-like bodies 13, and as shown in FIG. It is provided in the side part in the state spaced apart from the top plate 1 to the downward side. Each receiving support member 14 is provided in a state of being supported by a pair of left and right vertical plate members 17, 17 erected from a fixed support body 16, and can be deformed by receiving and supporting the leg-shaped body 13. It is configured.

  When the virtues 2 are mounted at predetermined positions on the top plate 1 for supporting the object to be heated, the leg bodies 13 contact the receiving support members 14 before the bottom surface of the base 2A is placed on the top plate 1. When the object to be heated N is placed on the virtues 2, a load combining the object to be heated N and the virtues 2 is transmitted through each leg 13. It is received and supported by the receiving support member 14. Therefore, the virtues 2 are arranged so that the receiving load of the receiving support member 14 that receives and supports the leg-like body 13 is changed by changing between the mounted state and the non-mounted state of the object N to be heated. 1 is provided so as to be movable up and down.

And the to-be-heated object detection means K which detects whether the to-be-heated object N is mounted in the virtues 2 is provided, This to-be-heated object detection means K receives and supports the leg-shaped body 13. A change in the receiving load of the member 14 is configured to be detected.
Specifically, the heated object detecting means K is constituted by a strain gauge 18 that detects the strain amount of each receiving support member 14. Since the amount of distortion of the receiving support member 14 corresponds to the magnitude of the receiving load when receiving and supporting the leg 13, the strain gauge 18 receives and supports depending on the amount of distortion. The size of the receiving load when receiving and supporting by the member 14 can be detected.

  As shown in FIG. 4, the three legs 13 are evenly spaced in the circumferential direction of the five virtue bases 2A, so that each leg 13 stably supports a load. In other words, when the received loads detected by the three strain gauges 18 are summed up, the summed load is equal to that of the heated object N when the heated object N is placed on the virtues 2. This corresponds to the total mass of the mass and the mass of Gotoku 2, and corresponds to the mass of Gotoku 2 when the heated object N is not placed on Gotoku 2.

  As shown in FIGS. 1 and 4, the detection values of the strain gauges 18 are input to the control unit 4 configured with a microcomputer, and the control unit 4 detects the strain gauges 18. Based on the value, it is determined whether the object to be heated is in the state where the object to be heated N is placed in Gotoku 2 or the state in which there is no object to be heated in which the object to be heated N is not placed in Gotoku 2 Is configured to do.

  That is, the control unit 4 obtains the magnitude of the receiving load when receiving and supporting each leg-like body 13 by each receiving support member 14 based on the detection value of each strain gauge 18, and sums them. By doing so, the total load supported by the three legs 13 can be obtained. And since the weight of Gotoku 2 is known in advance, if the weight of Gotoku 2 or a weight close thereto is detected, the heated object N is not placed and the heated object N is not placed. When a value larger than the set amount by weight is detected, it can be detected that the heated object is in a state where the heated object N is placed on Gotoku 2.

  Furthermore, when the control unit 4 determines that the heated object present state has been switched to the non-heated object present state based on the detection value of each strain gauge 18 during the heating operation of the burner 3, The heating amount lowering process for reducing the heating amount 3 is executed.

  If it demonstrates, the control part 4 will control the opening degree of the fuel supply amount adjustment valve 11 so that the thermal power of the burner 3 may become the thermal power set by the thermal power regulator (not shown) with which the operation part 5 is equipped. It is configured. And as shown in FIG. 5, when the burner 3 is performing a heating operation, based on the detection value of each strain gauge 18, the to-be-heated object N by which the to-be-heated object N is mounted in Gotoku 2 exists. When it is determined from the state that the heated object N has not been placed in Gotoku 2 and the heated object is not present (steps 1 and 2), a heating amount lowering process for reducing the heating amount of the burner 3 is executed. (Step 3). As shown in FIG. 6, this heating amount lowering process reduces the fuel supply amount so that the set thermal power set by the thermal power adjuster becomes a predetermined small thermal power state, and then there is no object to be heated. When the state continues for the set time t1 or longer, the combustion of the burner 3 is stopped.

[Another embodiment]
Hereinafter, other embodiments are listed.

(1) In the above-described embodiment, the receiving support member is provided in a state of being erected and supported by a pair of left and right vertical plate members 17, 17 erected from a fixed support, and receives and supports the leg-shaped body 13. In this example, the heated object detecting means K is configured by a strain gauge 18 that detects the amount of distortion of the receiving support member 14. It may be configured as follows.

  As shown in FIG. 7, the heated object detecting means K is configured such that the receiving support member 14 is fixed and extended laterally outward from the outer peripheral side portion of the annular casing member 9. The receiving surface 14 a of the receiving support member 14 may be constituted by a pressure sensor 19 that detects the pressure received from the leg 13. The receiving support member 14 may be formed in a band plate shape, or may be configured to extend radially at positions corresponding to the three legs.

(2) In the above embodiment, the leg-shaped body is provided so as to extend to the lower side of the top plate through a through hole formed in the top plate, but instead of such a configuration, FIG. As shown in FIG. 3, the leg 13 passes through the opening 1a formed in the top plate 1 for heating the article N to be heated by the burner 3, and passes through the through hole 20 formed in the juice tray 12. It is good also as a structure provided so that it may extend in the downward side of a top plate.

(3) In the above embodiment, each receiving support member is provided at a location below the top plate and spaced from the top plate. However, instead of this configuration, each receiving support member is provided. It is good also as a structure which provides a stop support member on the upper side of a top plate. If comprised in this way, the protrusion amount of the said leg-shaped body which protrudes toward the downward direction from the said virtues can be made small.

(4) In the above embodiment, based on the detection value of the heated object detection means, the heated object is in a state where the heated object is placed on the virtues or the heated object is placed on the virtues. It is configured to discriminate whether there is no heated object, but not only for determining whether the heated object exists, but also by using the detection value of the heated object detection means, It is also possible to obtain the mass of the object to be heated by calculation and display the measurement result, for example, on a display device provided on the operation panel of the stove, etc. Good.

(5) In the above-described embodiment, the leg-shaped body and the receiving support member are each provided in three, but the leg-shaped body and the receiving support member may be provided one by one. For example, as shown in FIGS. 9 and 10, one leg-like body 13 is provided so as to protrude downward from the base body 2 </ b> A, and extends below the top plate 1 through a through hole 21 formed in the top plate 1. The top plate 1 is stably supported so that the virtues 2 can be tilted so that the leg 13 can move up and down at two places provided at appropriate intervals in the circumferential direction of the base 2A with respect to the leg 13 In order to do this, the mounting support part 22 formed with a protrusion that fits into the recess formed in the top plate 1 is formed, and the virtues 2 are placed in the mounting state and the non-mounting state of the object N to be heated. It is good also as a structure provided so that the receiving load of the receiving support member 14 which receives and supports the leg-shaped body 13 may change by changing.

(6) In the said embodiment, although the said leg-shaped body was set as the structure provided integrally with five virtues, a leg-shaped body is good also as a structure provided with another with respect to five virtues. In short, the leg-shaped body may be configured to support the virtue and the load of the object to be heated placed on the virtue so that the load can be received and supported by the support member.

(7) In the above embodiment, as the heating amount lowering process, when the heating means of the burner is switched to a preset small heating power state, and then the non-heated object non-existing state continues for a set time, the burner combustion However, instead of such a configuration, a process for immediately extinguishing the burner may be performed as the heating amount reduction process.

(8) In the above embodiment, the object to be heated is heated by the gas combustion type burner as the heating means. However, as the heating means, an electric type such as one using a magnetic field generating coil that performs electromagnetic induction heating is used. You may comprise by a heating part.

Schematic configuration diagram of the stove The figure which shows the support structure by the receiving support member The perspective view which shows the support state of five virtues The figure which shows the arrangement | positioning state of a leg-shaped body and a receiving support member Flow chart of control operation Thermal power reduction processing time chart Schematic configuration diagram of a stove according to another embodiment Schematic configuration diagram of a stove according to another embodiment Schematic configuration diagram of a stove according to another embodiment The figure which shows the structure of five virtues of another embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Top plate 2 Gotoku 2A Base body 2B Claw part 3 Heating means 4 Operation control means 13 Leg-shaped body 14 Receiving support member K Heated object detection means

Claims (5)

The five virtues provided with a plurality of claws for placing an object to be heated while projecting upward from the annular base body, and the object detection means for detecting whether the object to be heated is placed on the five virtues And a stove equipped with
A leg-like body projecting downward from the base of the virtues, and a receiving support member that receives and supports the lower end of the leg-like body,
The five virtues are provided so that the receiving load of the receiving support member that receives and supports the leg-like body by changing between a placement state and a non-placement state of the object to be heated,
A stove configured to detect a change in a receiving load of the receiving support member that receives and supports the leg-shaped body. The receiving support member is provided at a position below the top plate in a state of being separated from the top plate,
The leg-shaped body is provided in a state extending toward the lower side of the top plate,
With respect to the top plate so that the receiving load of the receiving support member that receives and supports the leg-like body changes when the five virtues change between the mounted state and the non-mounted state of the object to be heated. The stove according to claim 1, wherein the stove is provided so as to be movable up and down. The receiving support member is configured to be deformable by receiving and supporting the leg-shaped body,
The said to-be-heated object detection means is comprised so that the distortion amount of the said receiving support member may be detected in order to detect the change of the receiving load when receiving and supporting the said leg-shaped body. The stove described. Three or more leg-shaped bodies are provided in a state in which the leg-shaped bodies are evenly spaced in the circumferential direction of the base of the five virtues,
A plurality of the heated object detecting means are provided corresponding to each of the plurality of leg-shaped bodies, and detect the magnitude of the receiving load when receiving and supporting by the receiving support member. The stove according to any one of claims 1 to 3, which is configured. A heating means for heating the object to be heated placed on the five virtues, and an operation control means for controlling the operation of the heating means are provided,
The operation control means is
During the heating operation of the heating means, based on the detection result of the heated object detection means, the heated object is placed on the five virtues from the heated object existing state where the heated object is placed on the five virtues. In any one of Claims 1-4 comprised so that the heating amount fall process which reduces the heating amount of the said heating means may be performed if it discriminate | determines having switched to the to-be-heated material non-existing state which has not been. The stove described.

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