JP4709930B2 - Stove - Google Patents

Description

  The present invention provides a flat top plate, a top plate opening formed in the top plate, and a space provided below the top plate opening so as to burn fuel gas and flame below the top plate opening. And a burner that heats an object to be heated, and relates to a household or commercial stove mainly used for cooking.

  The conventional general stove has been configured to directly heat a pan (an example of an object to be heated) placed on the Gotoku with a flame formed by a burner exposed above the top plate. Such a stove has the advantages of relatively good thermal efficiency (about 45% to 60%) and excellent response to heating. In addition, the virtues provided in this kind of stove were formed so as to extend in a cantilevered state from the base placed on the top plate toward the periphery of the burner above the top plate.

  Patent Document 1 discloses a stove in which a top plate is provided with a sensor (number 13 in Patent Document 1) for detecting whether a pan or the like to be heated is displaced with respect to the stove. Has been. Thereby, the presence or absence of the pan or the positional deviation of the pan can be detected and a warning can be given to the user by display or voice.

  Moreover, in patent document 2, in order to infer the temperature of the food in a pan, the stove (FIG. 2 in patent document 2) which provided the contact-type temperature sensor, such as the thermistor which contacts the bottom face of a pan, and A stove provided with a non-contact temperature sensor for detecting the temperature of the bottom of the pan (FIG. 1 in Patent Document 2) is disclosed.

In addition, as a stove that combines high thermal efficiency and heat output with excellent aesthetics and ease of cleaning, the object to be heated is separated by a burner provided below the top plate opening that opens in the top plate on the flat plate. A stove configured to heat directly with fire is known (see, for example, Patent Documents 3 and 4).
The stove described in Patent Documents 3 and 4 is configured to discharge the combustion exhaust gas of the combustion portion formed between the top plate opening and the burner to the outside through an exhaust passage provided below the top plate. It is. For this reason, since the object to be heated can be placed so that the top plate opening is closed, the aesthetics and the ease of cleaning are improved without providing the virtues of the object to be heated.

JP 2003-302053 A (refer to paragraph 0017 etc.) Japanese Patent Laid-Open No. 3-213315 (see FIGS. 1-2) Japanese Patent Laying-Open No. 2002-267163 (see paragraphs 0007 to 0009, FIG. 2, etc.) Japanese Patent Laying-Open No. 2003-269725 (see paragraphs 0007 to 0009, FIG. 2, etc.)

  The five virtues provided on the conventional stove have a flat top plate, but the virtue is located above the top plate around the burner. It cannot be said that there is no problem.

  In the stove described in Patent Documents 3 and 4, the top plate opening is closed when the object to be heated is heated, and the combustion exhaust gas from the combustion part does not flow out to the side of the object to be heated. Only the bottom of the heated object can be heated. Therefore, it is conceivable that the stove is provided with five virtues so that a part of the combustion exhaust gas flows out along the side of the object to be heated, but this also has a problem that the aesthetics and the ease of cleaning are impaired. there were.

  Further, in the stove described in Patent Documents 1 and 2, since the sensor for detecting the positional deviation of the object to be heated and the temperature is directly exposed to the flame of the stove or the high-temperature combustion gas, there is a problem that it is likely to break down. there were.

  Accordingly, an object of the present invention is to solve the above-described problems, and provides a stove that is excellent in aesthetics and easy to clean while maintaining high heat efficiency and heat output by performing direct heating. The purpose is to do.

The first feature of the stove according to the present invention is a flat top plate, a top plate opening formed in the top plate, and a fuel gas burned by being provided separately below the top plate opening. And a burner that forms a flame below the top plate opening and heats the object to be heated, and the object to be heated is placed around the top plate opening of the top plate. Three or more protrusions are formed in a shape that bulges from the top plate, and the object to be heated from below the top plate through a window formed in a state extending from the upper end of the protrusion to the lower end of the top plate. There is provided a non-contact type heated object state detecting means for detecting an object state, and the non-contact type heated object state detecting means is a temperature sensor that senses the intensity of infrared rays emitted from an object. .

According to the first characteristic configuration described above, by placing the object to be heated on three or more protrusions, the bottom surface of the object to be heated becomes higher than the top surface of the top plate, and has a diameter larger than the inner diameter of the top plate opening. When the heated object is placed on the top plate opening, the top plate opening is not closed, and a gap is formed between the top plate and the object to be heated. From this gap, the combustion exhaust gas from the combustion part flows out to the upper side of the top plate along the side part of the object to be heated, and the object to be heated can be heated from the side part by the outflowing combustion exhaust gas. Therefore, not only the bottom surface of the object to be heated but also the side portions can be used as the heat transfer surface, and the heat efficiency and the heat output can be maintained high.

  Further, the non-contact type heated object state detecting means does not directly contact the heated object, but indirectly detects the state of the heated object through the window. Therefore, even when the object to be heated is in an overheated state, it is hardly affected by the object to be heated in a high temperature state. Therefore, the state of the object to be heated can be accurately detected in a state in which the non-contact type object to be heated state detector is not easily damaged.

Schematic showing the installation state of the stove of the present invention Partial cross-sectional view of the stove of the present invention Schematic of oval projection Schematic diagram of circular protrusion Schematic diagram of polygonal protrusion Schematic of a stove with a heated object state detection means on the protrusion Schematic cross-sectional view of a stove provided with a heated object presence detection means on the protrusion Schematic of a stove provided with contact-type temperature detection means and non-contact-type temperature detection means

[Reference Embodiment and Reference Embodiment of the Present Invention]
Embodiments of the present invention and reference embodiments will be described below with reference to the drawings.
FIG. 1 is a schematic diagram of a built-in stove 100 configured as a stove according to the present invention, and the stove 100 is an installation section 102 opened in a counter 101 of a system kitchen.
Is provided.

  Moreover, as shown in FIG. 2, the stove 100 is formed in a state of opening to the top plate 1 made of heat-resistant glass and having a flat plate shape, and a heated object N such as a pan is placed around it. And a burner 3 that burns a fuel gas G such as city gas and forms a flame 10 below the top plate opening 2 to heat the object N to be heated.

  The top plate 1 has a planar upper surface, and the upper surface is configured to be substantially flush with the upper surface of the counter 101. The top plate opening 2 is a circular opening having an inner diameter (opening width) slightly smaller than the outer diameter (width) of a general heated object N. For example, the inner diameter of the top plate opening 2 is about φ70 to φ150 mm. It is. Furthermore, the top plate opening 2 can be closed with a lid or the like when not in use.

The burner 3 is a Bunsen combustion type burner, in which an air-fuel mixture of fuel G and air supplied to the mixing pipe 5 by jetting of the fuel gas G from the gas nozzle 6 is jetted from a plurality of flame ports 3a and burned. A primary flame is formed, and a secondary flame is formed by taking in secondary combustion air supplied from the inside and lower side of an annular casing member 3b, which will be described later, and a flame 10 is formed below the top plate opening 2. It is configured.
Further, the burner 3 is provided below the top plate opening 2 so as to be spaced apart, and is formed on an annular casing member 3b to which an air-fuel mixture of fuel gas G and air is supplied, and an annular inner surface of the annular casing member 3b. The fuel gas G and the air mixture are jetted in an annular inward direction to have a plurality of flame ports 3a for combustion.
In such a burner 3, the fuel gas G and air mixture supplied from the mixing pipe 5 into the annular casing member 3 b is ejected from the flame port 3 a in a substantially horizontal inward direction. The primary flame in which the mixture of the injected fuel gas G and air combusts turns to the upper top plate opening 2 side by buoyancy, and the secondary flame is formed toward the top plate opening 2 side. In other words, the bottom surface of the heated object N in the top plate opening 2 can be satisfactorily heated by the flame 10.

  Further, the flame outlet 3a of the burner 3 is provided at a distance of about 10 to 50 mm downward from the top surface of the top plate 1, that is, the bottom surface of the heated object N, and between the burner 3 and the top plate opening 2. The combustion part 11 is formed.

  Around the top plate opening 2 of the top plate 1, there is provided a gap forming portion for forming a gap S through which the combustion exhaust gas flows out to the outside between the object to be heated N and the top plate 1. It is. Specifically, the gap forming portion is configured by providing four protrusions 60 on which the article to be heated N is placed evenly in the circumferential direction around the top plate opening 2. Three or more protrusions 60 may be provided around the top opening 2 so that the posture is stabilized when the article N to be heated is placed.

Various shapes such as an oval shape (FIG. 3), a circular shape (FIG. 4), and a polygonal shape (FIG. 5) can be adopted as the shape of the protrusion 60 in the horizontal plan view. Like the protrusion 60 shown in FIGS. 3-4, it is preferable to set it as a curved surface shape from the upper direction of the protrusion 60 in which the to-be-heated material N is mounted to the side of the protrusion 60. FIG. At this time, it is possible to prevent the cleaning tool from being caught by the protrusion when cleaning the periphery of the top plate opening during cleaning.
If each protrusion 60 is an ellipse shape, for example, the size of a long dimension (L) 40-50 mm and a short dimension (W) 10-20 mm is illustrated. In addition, the height dimension (H) of the protrusion 60 is relatively in the range of 5 to 20 mm, preferably in the range of 5 to 10 mm, in view of the balance between aesthetics and ease of cleaning, thermal efficiency, and heat output. Set to a low value.
Each protrusion 60 can be formed of the same heat-resistant glass as the top plate 1.
The sizes and materials described above are not limited to these. When the protrusion 60 is formed of heat-resistant glass, a preferable aesthetic appearance is exhibited.

When the object to be heated N is placed on the three or more protrusions 60, the bottom surface of the object to be heated N becomes higher than the upper surface of the top plate 1. Therefore, when the heated object N having a diameter larger than the inner diameter of the top plate opening 2 is placed on the top plate opening 2, the top plate opening 2 is not closed, and the top plate 1 and the heated object N are not closed. A gap S is formed between the two. By forming the gap S in this way, the combustion exhaust gas from the combustion section 11 can flow out from the gap S along the side part of the article N to be heated above the top plate 1.
Therefore, since the heated object N can be heated from the side part by the combustion exhaust gas flowing out from the gap S, not only the bottom surface of the heated object N but also the side part can be used as the heat transfer surface, and the thermal efficiency and heat output Can be kept high.

For example, the protrusion 60 is preferably formed in a shape that bulges from the top plate 1 in a state where the peripheral edge portion is inclined. At this time, the contact angle between the top surface of the top plate 1 and the side surface of the protrusion 60 is an obtuse angle. Therefore, when cleaning the periphery of the top plate opening 2 with a cleaning tool such as a rag, the movement of the cleaning tool becomes smooth and the cleaning tool is hardly caught on the protrusion 60. Moreover, it becomes difficult for dust to collect at the boundary portion where the top surface of the top plate 1 and the side surface of the protrusion 60 contact. On the other hand, even if dust accumulates at this boundary portion, it can be easily removed. Therefore, the stove is easy to clean and easy to keep clean.
When the boundary portion is formed in a smooth curved shape, when the peripheral edge of the top plate opening 2 is cleaned by the cleaning tool, the movement of the cleaning tool becomes smoother and the ease of cleaning is improved.

  Further, the protrusion 60 can be formed integrally with the top plate 1. At this time, since the protrusion 60 and the top plate 1 can be formed without a gap, dust does not easily collect at the boundary portion between the protrusion 60 and the top plate 1. Alternatively, the protrusion 60 can be configured to be detachable from the top plate 1. When the projection 60 is removed from the top plate 1 during cleaning, the convex portion on the top surface of the top plate 1 disappears, and the cleaning becomes easier.

The protrusion 60 can be provided with a heated object state detecting means 7 for detecting the state of the heated object N (FIGS. 6 to 8).
By providing the heated object state detecting means 7 on the protrusion 60 on which the heated object N is placed, the state of the heated object N is accurately determined in a state where the influence of the flame 10 on the heated object state detecting means 7 is suppressed. can do.

For example, as shown in FIGS. 6 to 7, as the heated object state detecting means 7, a plurality of heated object presence / absence detecting means 71 for detecting the presence or absence of the heated object N are provided, and a plurality of heated object presence / absence A displacement determination means 8 for determining the displacement of the object to be heated N from the detection result of the detection means 71 can be provided.
In addition, the to-be-heated object presence-and-absence detection means 71 can be comprised with the sensor which can detect the presence or absence of the contact with the to-be-heated object N, for example.

  The heated object presence / absence detecting means 71 is provided, for example, on two protrusions 60, and three (71a-71c) are disposed on each protrusion 60. In this way, by providing the plurality of heated object presence / absence detecting means 71 on the support protrusions of the heated object N, the presence / absence of the heated object N can be reliably detected.

  When the number of the heated object presence / absence detecting means 71 for detecting the heated object N is the same in each protrusion 60, for example, the two heated object presence / absence detecting means 71a and 71b in each protrusion 60 detect the heated object N. In this case, it can be determined that the object N to be heated is normally placed on the protrusion 60. However, when the number of the heated object presence / absence detecting means 71 for detecting the heated object N is different in each protrusion 60, it can be determined that the heated object N is placed on the protrusion 60 in a shifted state.

  When such a deviation of the object to be heated N is detected, the user is warned by a display by an LED or a notification by sound or the like, and a countermeasure against the deviation of the object to be heated N is promoted. Can do. Moreover, you may comprise so that a user may be notified about the grade and direction of deviation | shift, for example by lighting the number of LED according to the magnitude | size of deviation | shift.

Further, as the heated object state detecting means 7, as shown in FIGS. 6 and 8, a contact-type temperature detecting means 72 for detecting the temperature of the heated object N can be provided.
For example, a temperature sensor such as a thermistor can be applied to the contact-type temperature detecting means 72.

  As described above, by incorporating the contact-type temperature detecting means 72 that comes into contact with the object to be heated N, the temperature of the object to be heated N is suppressed while the influence of the flame 10 and the high-temperature combustion gas on the contact-type temperature detecting means 72 is suppressed. Can be detected. For this reason, failure is unlikely to occur, and accurate temperature detection of the heated object N can be performed. Therefore, overheating of the heated object N can be prevented, and accidents such as fire can be prevented in advance. In addition, an inexpensive contact-type temperature sensor can be used as the temperature detection means.

  The heating power can be controlled based on the temperature of the heated object N detected by the contact-type temperature detecting means 72. For example, a thermal power control means for controlling the thermal power is provided, and the control means analyzes temperature information of the object N to be heated from the contact-type temperature detection means 72 and appropriately adjusts the ejection amount of the fuel gas G from the gas nozzle 6. Thus, the heating power of the burner 3 is controlled. At this time, when the control means determines that the temperature of the article to be heated N is too high, the supply of the fuel gas G may be shut off.

Furthermore, as shown in FIG. 8, as a non-contact type heated object state detecting means for detecting the state of the heated object N from below the top plate 1 through the window 61 formed on the protrusion 60, Non-contact type temperature detecting means 90 can be provided.
As the non-contact type temperature detection means 90, for example, a temperature sensor that senses the intensity of infrared rays emitted from an object can be applied.

The window portion 61 can be formed as a communication port that communicates from the upper end of the protrusion 60 to the lower end of the top plate 1. For example, transparent heat resistant glass or the like may be fitted into the communication port.
The non-contact type temperature detecting means 90 does not directly contact the object to be heated N, but indirectly detects the temperature of the object to be heated N through the window portion 61. Therefore, even when the article to be heated N is in an overheated state, it is hardly affected by the article to be heated N in a high temperature state. Therefore, it is possible to accurately detect the temperature of the heated object N in a state in which the non-contact type temperature detecting means 90 is not easily damaged.

  Further, as the non-contact type heated object state detecting means, a heated object presence / absence detecting means 71 for detecting the presence / absence of the heated object N from the lower side of the top plate 1 is disposed through the window 61. Based on the detection result of the heated object presence / absence detection means 71, the deviation determination means 8 described above may determine the deviation of the article N to be heated.

[Another embodiment]
Next, another embodiment of the stove of the present invention will be described .
(1 ) In the above embodiment, the protrusion 60 and the top plate 1 may be separate members, and the protrusion 60 and the top plate 1 may be manufactured separately, and then the protrusion 60 may be fixed to the top plate 1. .
( 2 ) In the above embodiment, the combustion exhaust gas from the combustion unit 11 is configured to flow out above the top plate 1 through the gap S. However, a part of the combustion exhaust gas is not passed through the gap S. You may comprise so that it may discharge separately.

DESCRIPTION OF SYMBOLS 1 Top plate 2 Top plate opening part 3 Burner 11 Combustion part 60 Protrusion 71 To-be-heated object presence detection means (to-be-heated object state detection means)
72 Contact-type temperature detection means (heated object state detection means)
90 Non-contact type temperature detection means (non-contact type heated object state detection means)
N heated object

Claims (1)

A flat top plate, a top plate opening formed in the top plate, and spaced apart below the top plate opening to burn fuel gas and form a flame below the top plate opening In the stove provided with a burner for heating the object to be heated,
Around the top plate opening of the top plate, three or more projections on which the object to be heated is placed are formed so as to bulge from the top plate, and from the upper end of the projection to the lower end of the top plate Provided with a non-contact-type heated object state detecting means for detecting the state of the heated object from below the top plate through a window formed in a state that reaches,
A stove in which the non-contact type heated object state detection means is a temperature sensor that senses the intensity of infrared rays emitted from an object.

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