JP3418092B2 - Stove - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stove having a function of preventing an overheated state inside a stove body, an outer case, or a member adjacent to the stove.

[0002]

2. Description of the Related Art The allowable range of the size of a pot or the like heated by a stove has a correlation with the capacity and size of the stove. When an object to be heated such as a pan that is large enough to cover the upper surface of the stove is heated, hot air from the heating source is trapped in the gap between the upper surface of the hob body and the lower surface of the object to be heated, which causes various problems. The inconvenience will be described in more detail.

As an example of the stove, a drop-in stove shown in FIG. 9 is a countertop of a system kitchen.
It can be attached to (11). Stove body
(2) comprises a main body case (20) consisting of an upper case (21) and a lower case (22) that are vertically separably joined together, and a gas burner (31) housed in the main case (20). Is formed in.

The gas burner (31) as a heating source is arranged and fixed in the lower case (22), and a suspension flange (23) is provided around the upper end of the other upper case (21). Has been done. Further, a top plate (41) having a spillage storage portion formed by being squeezed downward is provided with a lid at the upper end opening of the upper case (21), and the top plate (41) has five virtues. (51) is placed, the claw piece (52) of the Gotoku (51) and the outer peripheral flange (4) of the top plate (41).
The upper surface of 2) has almost the same height. As a result, the top surface of the stove is made flat, and the pan can be smoothly slid between the Gotoku (51) and the countertop (11).

As shown by the phantom line in FIG. 9, the above drop-in stove has a countertop (1
It is used by attaching it to the attachment opening (12) formed in 1) in a dropped state. In this mounted state, the hanging flange (23) protruding to the outer periphery of the upper case (21) engages with the peripheral edge of the mounting port (12) from above via the rubber packing (200).

[0006]

[Problems to be Solved by the Invention]
Since the upper surface of 1) and the upper surface of the outer peripheral flange (42) of the top plate (41) are almost at the same height, a large pot (91) is placed on the Gotoku (51) as shown by the phantom line in the figure. When placed, the upper region of the gas burner (31) is almost closed by the bottom of the pot (91). Therefore, the hot air from the gas burner (31)
The top plate (41) and the upper case (21) in the vicinity of the top plate (41) are placed in a high temperature state because of being trapped between 1) and the top plate (41). From this, the body case
The rubber packing (200) and the countertop (11), which are interposed between the (20) and the countertop (11), may be thermally damaged or the wall surface around the stove installation area may be heated. . Further, even when the iron plate is placed on the stove and used for cooking improperly, the upper surface of the stove is closed by the iron plate, which causes the same problem as described above.

In the above description, the problem has been explained by exemplifying the drop-in stove attached to the countertop (11) of the system kitchen, but the table stove mounted on the cooktop or the like also has the above-mentioned problem. If it is used as described above, there is a concern that the wall surface around the stove installation portion may be heated and the like, and there is the same problem as described above. The present application has been made in view of such a point, and prevents the main body case (20) from being overheated, and thus, the main body case (20), or the stove-installed portion and the wall surface around the stove are thermally protected. The problem is to prevent inconvenience of being damaged.

[0008]

The technical means of the invention according to claim 1 for solving the above-mentioned problems is to provide a "heating source for generating heat in a concave portion of an upper surface of a top plate which covers an upper end opening of a stove body. A vent passage connected to the inside of the recess from the stove body and forming an air flow by a draft when the heat source generates heat; a temperature detection means for detecting the temperature of the ventilation passage; and a detection by the temperature detection means And a control means for stopping the heating source when the temperature exceeds the set temperature. ”

The above technical means operates as follows. When a pot with an allowable size is placed on the stove and the heating source is heated, the temperature rises in the recess on the top surface of the top plate where the heating part of the heating source is provided, and the draft at this time causes the stove body to rise. A flow of air is generated from the inside in the ventilation path connected to the recess. In this case, the temperature detecting means detects the temperature of the flowing air, and since the air is constantly flowing in the ventilation passage, the detected temperature does not rise so much.

Next, when a large pot or an iron plate is placed on the stove, the recess on the top surface of the top plate is almost closed by the bottom of the pot or the like. Then, the draft is suppressed, and the air flow in the ventilation passage is extremely reduced. Therefore, the degree of cooling of the ventilation passage by the air flow is lowered, and the temperature of the ventilation passage is increased. Then, when the temperature of the vent passage becomes equal to or higher than the set temperature, the control means stops the heating source by the output of the temperature detecting means for detecting the temperature.

In order to detect the temperature of the ventilation passage, the construction of "the temperature detecting portion of the temperature detecting means is located in the ventilation passage" may be adopted as in the invention of claim 2. According to the invention of Item 3, if the “temperature detecting portion is formed in the wall of the recess and is disposed in the vicinity of the air discharge port that is the downstream end of the ventilation path”, it is drafted. The generated air flow surely contacts the temperature detecting portion of the temperature detecting means. This is because the air discharge port concentrates air when a draft occurs, and the temperature detection unit is provided in the vicinity of a portion where the air flow concentrates.

In order to detect the temperature of the ventilation passage, in addition to directly detecting the temperature of the ventilation passage by the temperature detecting portion of the temperature detecting means as described above, as in the invention of claim 4,
The "temperature detecting portion of the temperature detecting means may be in contact with a heat transfer plate extending into the ventilation path".
Also in this case, as in the fifth aspect of the invention, the "the heat transfer plate is formed in the wall of the recess and extends in the vicinity of the air discharge port which is the downstream end of the air passage". Then, since the heat transfer plate extends in the vicinity of the air discharge port where the air flow is concentrated when the draft occurs, the heat transfer plate surely contacts the air flow when the draft occurs.

When the heat transfer plate is used as in the inventions of claims 4 and 5, the heat exchange plate is provided with a fin for heat exchange on the surface of the heat transfer plate as in the invention of claim 6. The heat transfer function of the heat transfer plate is enhanced.

[0014]

As described above, according to the first to sixth aspects of the present invention, the heating operation can be stopped by the output of the temperature detecting means when the stove body is in a high temperature state. Since the stove is not left in an overheated state, it is possible to prevent the problem that the stove installation section and the wall surface around the stove are thermally damaged.

According to the third aspect of the invention, the flow of air generated in the draft surely comes into contact with the temperature detecting portion of the temperature detecting means, so that highly accurate temperature detection can be performed. For the same reason, the invention of claim 5 can also detect the temperature with high accuracy. In the invention of claim 6, since the heat absorption function of the heat transfer plate is improved,
The detection accuracy of the temperature of the ventilation path is further increased.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment in which the above-mentioned invention is applied to a built-in stove attached to a countertop of a system kitchen will be described with reference to the drawings. As shown in FIG. 1, the countertop (11) of the system kitchen is provided with a mounting opening (12) so that the built-in stove according to the present embodiment can be mounted in the mounting opening (12). Has become.

This built-in stove includes a stove body (2),
The top opening (2A) of the stove body (2) is provided with a top plate and Gotoku, which will be described later, and are provided with a lid. In this embodiment, the oven (25) is screwed (109) (1) under the stove body (2).
09) (see FIG. 2), which are connected and fixed in series, and both are housed and held in a rectangular box-shaped outer cover (60) that opens forward and upward. The details of each unit will be described below. [About the stove body (2)] As shown in Fig. 1, the stove body (2) is composed of an upper case (21) and a lower case (21) which are separably joined to each other via connecting screws (15) (15). A main body case (20) composed of 22) and three gas burners (31) (31) (31) as heating sources arranged in the lower case (22) are provided.
The oven (25) is screwed under the lower case (22).
(109) and (109) (see FIG. 2) are connected.

* Regarding the upper case (21) The upper case (21) is formed in a rectangular frame shape as shown in FIG. 1, and a flange (210) is projected outward on the outer periphery of the upper end of the upper case (21). A rubber packing (200) is attached to the flange (210) as shown in FIG. In addition, ventilation holes (217) (217) are formed in a pair of side plate portions facing each other in the lateral direction of the upper case (21).

As shown in FIG. 3, a bent piece (2) is formed from the lower side of the specific ventilation hole (217) formed in the side plate portion of the upper case (21).
16) is bent, and the bent piece (216) has a temperature detecting means.
A bimetal switch (719) is provided as (71). As shown in FIG. 4, the bimetal switch (719) is fixed with screws (108) (108) to the bent piece (216) bent from the lower side of the ventilation hole (217), and the bimetal switch (719) is also fixed. The switch (719) is movable between the case (715) and the upper and lower blocks (714) (713) built in the case (715), which are clamped vertically and the tips are vertically overlapped with each other. It has contacts (729) and fixed contacts (728).
Also, a lifting shaft that vertically penetrates the center of the upper block (714).
The upper end of (727) is in contact with the lower surface of bimetal (726), which is an arc-shaped thermosensitive element that is convex upward.
Both ends of (726) are engaged with grooves (725) in the inner peripheral wall of the recess formed on the upper surface of the upper block (714).

Therefore, the temperature detecting section (7) of the temperature detecting means (71) is
When the ambient temperature near (19a) rises, the temperature detector (719
a) The heat transferred from the upper surface of the barrel bimetal switch (719) deforms the bimetal (726) so that it is horizontal, and the lifting shaft (7
27) is pushed down, whereby the movable contact (729) separates from the fixed contact (728) and is turned off. Also, FIG.
As shown in FIG. 2, lead wires (72) and (72) are drawn out from the bimetal switch (719), and connectors (73) and (73) are provided at the tips thereof as shown in FIG. The connector (73) (73) has a connector (75) (75) at the tip of the lead wires (74) (74) pulled out from the control device (34) side attached to the lower case (22). It is designed to be detachably connected. Further, as shown in FIG. 1, an inner flange (211) is provided around the lower end of the upper case (21), and
The inner flange (211) is provided with four long holes (212) (212) at the portions facing each other in the lateral direction, and the long holes (212) (2
The four connecting screws (15) and (15) are individually inserted into the (12) and can be screwed into the lower case (22).

The long holes (212) (212) are formed in the upper case (21) even if the mounting position (12) of the countertop (11) is displaced forward and backward. This is because the front and rear positions of the upper case (21) with respect to the lower case (22) can be adjusted in a state where the front surface of the (22) is aligned with the front edge of the counter top (11) so that the deviation can be absorbed. * Lower case (22) As shown in Fig. 1, the upper case is on the upper surface of the lower case (22).
Insert the screw hole (22) into the part of (21) that corresponds to the long hole (212) (212).
1) (221) is formed, and the connecting screw (15) (with the elongated holes (212) (212) of the upper case (21) being overlapped with the screw holes (221) (221). 15) is screwed in. That is, as shown in FIG. 2, the upper case (21) and the lower case
(22) can be connected and separated by connecting screws (15) and (15).

As shown in FIG. 2, a gas burner (31) is fixed to the upper ends of the support legs (232) (232) standing upright from the bottom wall of the central recess (231) on the upper surface of the lower case (22). The tip of a flame detection sensor (32) composed of a thermocouple faces the flame hole of the gas burner (31), and the lead wire (33) pulled out from the flame detection sensor (32) is a control device ( 34). The flame detection sensor (32) is fixed to the gas burner (31). Then, the other two gas burners (31) and (31) arranged in the lower case (22) also have the support legs (232) in the same manner as above.
It is supported by (232) and equipped with a flame detection sensor (32),
These gas burners (31) (31) (31) and flame detection sensors (32) (32)
(32) etc. are all assembled in the same way. [Top plate (41)] As shown in FIG. 3, the top plate (41) covers the upper end opening (2A) of the stove body (2), and the central portion is squeezed to spill the reservoir. (S) (corresponding to the concave portion described in the section of technical means already described) is formed,
The bottom plate of the top plate (41) constituting the bottom surface of the boiled-up spill reservoir (S)
An outer peripheral wall (44) stands up on the outer periphery of (46).

The outer peripheral wall (44) is formed with an air discharge port (440) located at the lower end of an eaves portion (441) formed by cutting and raising the outer peripheral wall (44). 441) prevents spills from entering the air outlet (440). Further, the air discharge port (440) is formed at a portion facing a specific ventilation hole (217) formed in the side plate portion of the upper case (21). The bimetal switch (7) is connected to the ventilation passage that connects the specific air vent (217) to the corresponding air outlet (440).
19) is in the position. Further, the temperature detection part (719a) of the bimetal switch (719) is located near the air discharge port (440) through which air is concentrated when the burner burns, which will be described later. Therefore, the temperature detector (719a) is surely exposed to the air flow, and the temperature change due to the presence or absence of the air flow can be detected with high accuracy.

Further, as shown in FIG. 1, each of the air discharge ports (440) (440) is provided in a plurality of pairs on the outer peripheral wall (44) of the top plate (41) which are opposed to each other in the lateral direction. It is arranged. An outer peripheral flange (45) is provided around the upper end of the outer peripheral wall (44) standing on the outer periphery of the bottom plate (46) of the top plate (41).
The bottom plate (46) is provided with a burner insertion hole (43) for fitting the burner head of the gas burner (31) outside with a predetermined gap.

The air discharge port (440) and the vent hole (217) on the upper case (21) side may be provided only in the installation portion of the bimetal switch (719). [Auxiliary Top Plate (47) and Burner Ring (57)] As shown in FIG. 3, the auxiliary top plate placed on the upper surface of the top plate (41).
An outer peripheral flange (48) protrudes from the upper end of the outer periphery of (47), and the outer peripheral edge of the outer peripheral flange (48) is bent downward and placed on the step (400) on the top plate (41). It has become so. As a result, a predetermined gap can be secured between the auxiliary top plate (47) and the top plate (41) to serve as the spillage storage section (S).

Further, the gas burner (3
A burner insertion hole (49) is formed in the burner head of 1) so as to be fitted with a predetermined gap. The burner ring (57) fitted onto the gas burner (31) is adapted to be placed on the auxiliary top plate (47), and the burner ring (57) includes a bottom plate (46) of the top plate (41). ), A through hole (58) is formed. That is,
The spillage during cooking flows into the spillage storage section (S) on the top surface of the top plate (41) through the through hole (58). [About Gotoku (51)] Gotoku (51) placed on the top plate (41)
Is on the stepped part (40) for placing Gotoku, which is formed along the inside of the outer peripheral wall (44) connected to the outer peripheral flange (45) from the side of the spilled water storage part (S) of the top plate (41). The frame body (53) is placed, and the claw pieces (52) (52) extending from the frame body (53) to the vicinity of the gas burner (31). In addition, a plurality of excavated parts are provided at the bottom of the frame body (53)
(530) is formed, and from the air outlet (440) to the top plate (4
The air discharged into the inside of 1) flows to the gas burner (31) side through the excavation part (530). [Blowout Safety Control Circuit] The combustion state of the gas burner (31) is monitored by the blowout safety control circuit (control means for stopping the heating source) shown in FIG.

As shown in FIG. 5, a gas cock (83) and a safety valve (82) are sequentially inserted into the gas circuit (81) to the gas burner (31) from the upstream side, and the former gas cock (83) is a stove. It is adapted to be opened and closed by an operation knob (84) arranged on the operation portion of the main body (2). The other safety valve (82) is opened and closed by the electromagnetic unit (86). Specifically, when the flame detection sensor (32) consisting of a thermocouple is heated by the gas burner (31), an electromotive force is generated, which causes the electromagnetic unit (86) (of the electromagnetic coil excited by the electromotive force). With a magnetic force, the valve has a function of holding the valve body in the open state against the spring that tries to close the valve body), and the safety valve (82) is maintained in the open state. When it disappears, the electromagnetic unit (86) is deenergized and the safety valve (82) is closed by a spring. Then, the electromagnetic unit (8
6) and flame detection sensor (32)
A bimetal switch (719) having the function as 1) and opening / closing the closed circuit is provided. Therefore, when the temperature of the part where the bimetal switch (719) is installed becomes higher than the set temperature, the bimetal switch (719) is turned off and the electromagnetic unit (86) can keep the safety valve (82) open. A safety valve with a spring inside the electromagnetic unit (86)
(82) is closed. [Outer cover (60)] As shown in Fig. 1, the outer cover
The (60) is formed in a rectangular box shape that opens forward and upward, and is hung from brackets (63) and (64) on the inner surfaces of a pair of side plates (61) and (62) facing each other in the lateral direction. Tabane (66) (66)
(67) (67) is provided, the hook portion (F) (F) formed at the lower end of the spring (66) (66) (67) (67) is the outer surface of the oven (25). It is adapted to engage the hanging metal fittings (29) (29). This is because the heavy oven (25) is lifted by the springs (66) (66) (67) (67) when the stove body (2) is installed to facilitate the work. [Assembly work] Next, an operation of assembling the built-in stove to the countertop (11) of the system kitchen will be described.

The lower case (22) and oven (25) appearing in FIG.
The combined body is assembled in the outer cover (60) at the manufacturing stage in the factory and shipped in this assembled state. That is, the hook (F) of each spring (66) (67) of the outer cover (60) and the oven (25)
The oven (25) and the like are housed in the outer cover (60) by engaging with the hanging metal fittings (29) on the side surface, and the lower case (22) and the oven (25) are spring (66) in this state. Push down against (67) and cover them with the push down.
Temporarily fix it in (60) with a screw (not shown). Then, the lower case (22) and the oven (25) are shipped from the factory while being housed in the outer cover (60).

Then, the assembly of the lower case (22), the oven (25) and the outer cover (60) assembled in the factory as described above is attached to the system kitchen at the installation site by the following procedure.
First, slide the above assembly under the mounting opening (12) of the cow counter top (11), and then remove the screws that temporarily fix the oven (25) etc. to the outer cover (60) and remove the oven.
The assembly of (25) and the lower case (22) is suspended by the springs (66) and (67) on the outer cover (60).

Next, from above the mounting opening (12), the upper case (21)
Insert the inner flange (211) (21
Insert the four connecting screws (15) (15) into the screw holes (221) (221) on the upper surface of the lower case (22) facing the lower holes (212) (212) through the holes (1). ) And tighten it. Then, as shown in FIG. 2, the upper case (21) and the lower case (22) are coupled by the coupling screw (15) so as to be vertically stacked. In this state, the flange (210) of the upper case (21) engages with the periphery of the mounting opening (12) of the countertop (11).

After that, the lead wires (74) and (74) drawn out from the lower case (22) side and the lead wires (72) and (72) drawn out from the connectors (75) and (75) at the tip and the bimetal switch (719), respectively. Connect the connectors (73) (73) at the tips. Next, after covering the top plate (41) at the upper end opening of the upper case (21), the auxiliary top plate (47) is placed on the top plate (41), and the burner head part of the gas burner (31) is placed. Attach the burner cap (31a) to the outside and add the Gokutoku (51) to the top plate (4
When attached to 1), as shown in Fig. 2, the countertop (11)
Assembly work is completed.

In the completed state of the assembling work, as shown in FIG. 3, a bending piece bent from the side plate portion of the upper case (21).
The bimetal switch (719) attached to (216) is located between the ventilation hole (217) on the side plate portion of the upper case (21) and the air discharge port (440) on the side of the top plate (41) facing the ventilation hole (217). To position. That is,
The bimetal switch (719) is located in the air passage in which air flows due to the draft phenomenon when the burner burns, which will be described later. [Actual Use] Next, the operation of the built-in stove according to the above embodiment will be described.

When the operating knob (84) provided on the operating portion of the stove body (2) is rotated while being pushed, the safety valve (82) works against the spring in conjunction with the pushing of the operating knob (84). And the gas cock (83) is opened and gas is supplied to the gas burner (31). In addition, the operating knob (8
By the operation of 4), an ignition device (not shown) is activated and the gas burner (31) is ignited to be in a combustion state. Then,
The flame detection sensor (32) is heated by the flame of the gas burner (31) to generate electromotive force, which energizes the electromagnetic unit (86) to hold the safety valve (82) open and the gas burner (31) to open. It is maintained in a burning state.

When the pot (91) having an allowable size is placed on the top plate (41) and heated by the gas burner (31), the top plate (4
The temperature between 1) and the pan (91) rises, and the draft at this time causes the ventilation hole (217) of the upper case (21) → the installation part of the bimetal switch (719) → the air of the top plate (41). Air flows through a path connecting the discharge port (440) → the open-cut part (530) formed in the frame body (53) of the Gotoku (51) → the gas burner (31). Then, the air that has flowed to the gas burner (31) portion is heated by the gas burner (31) and moves upward, and flows to the outer peripheral side along the bottom of the pot (91), and then to the pot (91). The top plate (41) is exhausted through a gap between the upper end openings. Therefore, the bimetal switch
The (719) is cooled by air flowing in a ventilation path connecting the ventilation hole (217) formed in the upper case (21) to the air discharge port (440) formed in the top plate (41), and the bimetal switch (719) is The temperature detector (719a) of () detects a normal temperature lower than the set temperature, so that the bimetal switch (719) is maintained in the ON state. Therefore, the electromotive force of the flame detection sensor (32) is kept applied to the electromagnetic unit (86) and the safety valve (82) is kept open, whereby the combustion of the gas burner (31) continues. .

In addition to the above-mentioned path, the air in the main body (2) of the stove is connected to the inner peripheral edge of the burner insertion hole (43) formed in the bottom plate (46) of the top plate (41) and the gas burner (31). Outer periphery → Burner ring
(57) through hole (58) → also flows through the path connecting to the flame hole part of the gas burner (31). Therefore, as described later, the burner insertion hole
The temperature of the air flowing into (43) is controlled by a bimetal switch (719)
May be detected by.

Now, when a large pot (91) or iron plate is placed on the Gotoku (51) and the degree of blockage of the opening of the top plate (41) becomes large, the combustion exhaust gas of the gas burner (31) is discharged from the top plate (41). It is possible to suppress the discharge to the outside from between the opening peripheral edge and the pan (91). Then, from the vent hole (217) formed in the side plate portion of the upper case (21) to the air discharge port (440) formed in the outer peripheral wall (44) of the top plate (41).
The flow of air towards the stagnation is stagnant.

Then, the heat transferred from the stove construction wall such as the main body case (20) and the top plate (41) is transferred to the bimetal switch (719).
When the temperature of the portion starts to be settled and the temperature of the portion reaches the set temperature (140 ° C. in this embodiment), the bimetal switch (719) is turned off and the flame detection sensor (32) is turned off. The electromotive force is no longer applied to the electromagnetic unit (86). As a result, the electromagnetic unit (86) is deactivated, the safety valve (82) is closed, and the gas supply to the gas burner (31) is cut off. As a result, the gas burner (31) is maintained in a fire extinguishing state. Therefore, the flange of the upper case (21)
This prevents the rubber packing (200) and the like interposed between the (210) and the upper surface of the countertop (11) and the wall surface of the kitchen from being thermally damaged.

In order to repair the above built-in stove, in order to remove it from the counter top (11), the lead wires (72) (72) drawn from the bimetal switch (719) are connected to the connectors (73) (73) at the tips. The lower case (22) side connector (75) (75)
In addition to separating the above, the respective parts are disassembled in the reverse order of the above assembling, whereby the stove body (2) may be taken out in front of the counter top (11). [Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIGS.

In this structure, the temperature detecting section (719a) of the bimetal switch (719), which is the temperature detecting means (71), has the heat transfer plate (26).
It is pressed by the spring (17), and the temperature of the ventilation path through which air flows due to the draft phenomenon is indirectly detected via the heat transfer plate (26). A mounting plate (266) is attached to the bending piece (229) protruding from the upper edge of the lower case (22) with a screw (265), and the housing case (3) fixed to the mounting plate (266) is attached.
The lift plate (38) is urged upward by a spring (17) interposed between the lift plate (38) and the lower end flange (39) of the housing case (37) in (7). ) Contacts the lid (37a) of the housing case (37) and stops. Then, the lift plate (3
8) The temperature detection means (71) which is the bimetal switch (719)
Is fixed.

On the other hand, the bent piece (260) at the upper end of the heat transfer plate (26) made of a material having good heat conductivity such as copper or aluminum.
Screws (26) on the flange (210) at the top of the side wall of the upper case (21).
1) and the vertical piece (26) of the heat transfer plate (26).
2) is provided with a plurality of ventilation windows (264) (264) formed by cutting and raising heat exchange fins (263) (263).
The fins (263) (263) form the ventilation windows (264) (26
This is because the air passing through 4) enhances the cooling effect of the heat transfer plate (26).

The vertical piece (262) of the heat transfer plate (26) reaches from the vicinity of the air discharge port (440) to the lower end portion of the upper case (21), and the horizontal plate (267) at the lower end portion is covered with a bimetal switch. (71
The temperature detection part (719a) at the upper end of 9) is pressed by the spring (17). In this structure, since the heat transfer plate (26) extends to the vicinity of the air discharge port (440), the air concentrated in the air discharge port (440) surely contacts the heat transfer plate (26). This ensures cooling.

Further, except the arrangement of the bimetal switch (719), the configuration is the same as that of the above-mentioned embodiment.
In this type, when the burner burns, the air outside the stove body (2) is exposed to the ventilation holes (2) formed in the side plate of the upper case (21).
17) → Ventilation windows (264) (264) formed on the heat transfer plate (26) → Air discharge port (440) formed on the outer peripheral wall (44) of the top plate (41) → Frame of Gotoku (51) Opening / cutting portion (530) formed in the body (53) → Flows in a path connecting to a gas burner (not shown). Then, the heat transfer plate (26) is cooled by this flowing air, and the bimetal switch (719) contacting the horizontal plate (267) of the heat transfer plate (26).
The detection temperature of is kept below the set temperature.

Next, when a large pot, an iron plate, or the like is placed on the Gotoku (51) and the degree of obstruction at the upper end opening of the top plate (41) becomes large, air is discharged from the ventilation hole (217) of the upper case (21). Becomes less likely to flow in, which makes it difficult for the heat transfer plate (26) to be cooled. Then, the temperature detected by the bimetal switch (719) rises, and the gas burner (31) is maintained in a fire extinguishing state by the above-mentioned action. Therefore, in this embodiment, the temperature of the ventilation path connecting the ventilation hole (217) through which air flows due to the draft phenomenon during burner combustion and the air discharge port (440) is controlled by the bimetal switch (26) via the heat transfer plate (26). 719) and detected indirectly.

Also, in this embodiment, the gas burner (31)
And bimetal switch (719) and control unit (34) are lower cases
Since the bimetal switch (719) is placed in (22) and is only pressed against the heat transfer plate (26) by the spring (17), the lower case can be used when the stove body (2) is repaired. When the (22) and the upper case (21) are separated, the gas burner (31) and the like are separated from the upper case (21) integrally with the lower case (22). Therefore, for example, the bimetal switch (719) attached to the upper case (21) and the control device (34) attached to the lower case (22)
The upper case (2
There is no inconvenience that the lower case (22) and 1) cannot be separated,
The repair can be easily performed.

When the heat transfer plate (26) is extended to the lower end portion of the upper case (21) and the bimetal switch (719) is brought into contact with this portion as in this embodiment, the lower case (22) )
The bimetal switch (719) does not protrude significantly upward from above, and the lower case (22) attached to the outer case (60) as described above
Even when the above are slid below the countertop (11), the bimetal switch (719) is hard to hit the countertop (11), and the bimetal switch (719) does not interfere during the sliding operation. That is, when the lower end of the heat transfer plate (26) is located above the lower end of the upper case (21), the bimetal switch (719) largely protrudes upward from the lower case (22) and interferes with the sliding work. However, such inconvenience can be prevented. [Modified Examples of Each Part] In the above embodiment, the vent holes (217) (217) are provided in the side plate part of the upper case (21), but the vent holes (217) (217) are not always necessary. It is not necessary to form the upper case (21) and the lower case (22) of the stove body (2) in an airtight state, and conversely, various through holes and gaps may be formed due to processing requirements.
It is generally formed in (21) and the like. Therefore, when the gas burner (31) burns, the main body
(2) Air flows into the inside, and this is the outer peripheral wall (44) of the top plate (41).
This is because air is supplied to the gas burner (31) from the air discharge port (440) formed in the.

In this case as well, the bimetal switch (719) is disposed anywhere in the ventilation path through which air flows from the through hole or gap formed in the upper case (21) or the like to the air discharge port (440). However, it is desirable to dispose it in the vicinity of the discharge port (440) in the ventilation path. The air generated by the draft at the time of burning the burner is concentrated in the discharge port (440) through the through holes or gaps and is always supplied to the burner (31) side through the discharge port (440). This is because the bimetal switch (719) arranged in the vicinity is reliably exposed to the air and the temperature detection accuracy is improved. In each of the above embodiments, the temperature of the air flowing into the air discharge port (440) formed in the outer peripheral wall (44) of the top plate (41) is controlled directly or indirectly via the heat transfer plate (26). The burner insertion hole (4) formed in the bottom plate (46) of the top plate (41)
The temperature of the air (air flowing due to the draft phenomenon at the time of combustion of the gas burner (31)) flowing into 3) from below may be detected by the bimetal switch (719) directly or indirectly via a heat transfer plate. That is, the bimetal switch (719) is arranged near the lower part of the burner insertion hole (43) which is the air discharge port described in the above-mentioned technical means, or the burner insertion hole (4
The bimetal switch (7
19) are brought into contact with each other, whereby the temperature near the lower portion of the burner insertion hole (43) is detected directly or indirectly. Modification Example of Blowout Safety Control Circuit FIG. 8 shows a modification example of the blowout safety control circuit.
In this one, the thermistor (71
8) is adopted.

The output of the thermistor (718) is the temperature setter (1
It is applied to the temperature comparator (101) together with the output of (00),
Due to the output of the temperature comparator (101), the electromagnetic unit (86) of the safety valve (82) is deenergized and the abnormality notification lamp (102)
The alarm buzzer (130) is activated.
That is, when the temperature inside the stove body (2) becomes high and the temperature detected by the thermistor (718) exceeds the set value of the temperature setter (100), an L signal is output from the temperature comparator (101) and the electromagnetic signal is output. The unit (86) is deenergized, whereby the safety valve (82) is closed, and the abnormal condition is notified by lighting the abnormality notification lamp (102) and operating the abnormality notification buzzer (130). In the above embodiment, the upper case (2
1) and the lower case (22) can be separated, and the present invention is applied to the built-in stove in which the lower case (22) is attached to the countertop (11) of the system kitchen from the front side, but it is formed on the countertop (11). The present invention may be applied to a drop-in stove as shown in FIG. 12 in which the main body of the stove is integrally dropped from above into the formed mounting opening (12).

Further, the present invention may be applied to a table cooker placed on a cooking table for use. Although the gas burner is illustrated as the heating source in each of the above-described embodiments, it goes without saying that an electric heater can be used instead of the gas burner. As long as the structure of the body case (20) and the top plate (41) is configured as described above, the draft phenomenon when the electric heater generates heat causes air flow in the installation part of the bimetal switch (719). is there. In the above embodiment, the whole top plate is integrally formed.
Although the stove adopting (41) has been described as an example, the top plate main body having the soup saucer mounting opening is opened, and the soup saucer having an outer peripheral edge detachably mounted on the periphery of the soup saucer mounting opening. Formed top plate (top plate that can separate the soup saucer)
May be adopted.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a main part of a built-in stove for explaining a first embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of a state where the built-in stove according to the first embodiment is attached to the countertop (11) of the system kitchen.

FIG. 3 is an enlarged view of a main part of the built-in stove appearing in FIG.

FIG. 4 is a detailed view of an arrangement portion of the bimetal switch (719) shown in FIG.

5 is a control circuit diagram of the built-in stove appearing in FIG. 1. FIG.

FIG. 6 is a sectional view of an essential part of the stove according to the second embodiment.

7 is a perspective view of a heat transfer plate (26) incorporated in the stove shown in FIG.

FIG. 8 is an explanatory view of a modified example of the blowout safety control circuit applied to each embodiment.

FIG. 9 is an explanatory diagram of a conventional example.

[Explanation of symbols]

(2) ... cooker body (11) ・ ・ ・ Counter top (20) ・ ・ ・ Main body case (21) ・ ・ ・ Upper case (22) ・ ・ ・ Lower case (31) ・ ・ ・ Gas burner (71) ... Temperature detection means (719) ・ ・ ・ Bimetal switch

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F24C 3/12

Claims (6)

(57) [Claims] 1. A flow of air due to a heating source that generates heat in a recess in the top surface of the top plate that covers the upper opening of the stove body, and a draft that is connected from inside the stove body to the recess and that heats the heating source. A stove that includes: a ventilation passage in which a temperature is formed; a temperature detection unit that detects the temperature of the ventilation passage; and a control unit that stops the heating source when the temperature detected by the temperature detection unit is equal to or higher than a set temperature. 2. The stove according to claim 1, wherein the temperature detecting portion of the temperature detecting means is located in the air passage. 3. The stove according to claim 2, wherein the temperature detection unit is formed in the wall of the recess and is disposed in the vicinity of an air discharge port that is a downstream end of the ventilation path. 4. The stove according to claim 1, wherein the temperature detecting portion of the temperature detecting means is in contact with a heat transfer plate extending into the ventilation passage. 5. The stove according to claim 4, wherein the heat transfer plate is formed in a wall forming the recess and extends in the vicinity of an air discharge port which is a downstream end of the ventilation path. 6. The stove according to claim 4, wherein fins for heat exchange are provided on the surface of the heat transfer plate.