Stove and assembly method

Abstract

The present invention provides a stove and a method for assembling the stove that can accurately position an infrared temperature sensor relative to an opening in the top plate. [Solution] A circular opening 312 is provided in the top plate 3. The opening 312 is positioned where the optical axes of the two light-receiving elements of the infrared temperature sensor 51 intersect and pass through. The two light-receiving elements receive infrared radiation emitted from the bottom surface of the object to be heated through the opening. The infrared temperature sensor 51 is fixed inside the housing 2 by a bracket 61. The bracket 61 is provided with a circular insertion hole 671. The insertion hole 671 is positioned coaxially with the opening 312 in a plan view. A positioning rod 80 can be inserted into the insertion hole 671. When the positioning rod 80 is inserted into the insertion hole 671, it protrudes above the top plate 3 through the opening 312.

Description

Technical Field

[0001] The present invention relates to a stove and a method for assembling a stove.

Background Art

[0002] There is known a cooking device including a top plate having a predetermined opening, a heating source for heating a heated object placed above the top plate, and an infrared detection unit disposed below the top plate for detecting infrared rays radiated from the heated object and passing through the opening (see, for example, Patent Document 1). The infrared detection unit includes two light receiving elements. The opening is disposed at a position where the optical axes of the two light receiving elements pass. The two light receiving elements receive infrared rays radiated from the heated object through the opening.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The infrared detection unit is not attached to the top plate but is attached to a housing located below the top plate. The infrared detection unit is separated from the top plate. Therefore, when the top plate is attached to the upper part of the housing, misalignment easily occurs between the opening and the infrared detection unit. If misalignment occurs, the position of the opening deviates from the optical axes of the two light receiving elements, and temperature measurement may become difficult.

[0005] An object of the present invention is to provide a stove and a method for assembling a stove capable of accurately positioning an infrared temperature sensor and an opening of a top plate.

Means for Solving the Problems

[0006] The stove according to claim 1 is a stove having a top plate supported on the upper part of a housing, a burner provided on the upper surface of the top plate, and heating an object to be heated placed on a trivet installed around the burner, comprising: a bracket mounted below the top plate and inside the housing; an infrared temperature sensor fixed to the bracket, which receives infrared radiation emitted from the bottom surface of the object to be heated placed on the trivet using two infrared light receiving elements, and measures the temperature of the bottom surface based on the intensity of the received infrared radiation; and a circular opening provided on the top plate at a position where the optical axes of the two infrared light receiving elements intersect and pass through, wherein the bracket is provided with a circular insertion hole at a position coaxial with the opening in a plan view, a positioning rod can be inserted into the insertion hole, and the positioning rod, when inserted into the insertion hole, protrudes above the top plate through the opening. It is characterized by the following.

[0007] The bottom surface of the insertion hole portion of the stove according to claim 2 is provided with a mounting hole into which a fastener can be inserted from above, the bracket is fixed inside the housing by the fastener via the mounting hole, and the positioning rod may be cylindrical and have an inner diameter that allows the fastener to be inserted into the mounting hole from above when inserted into the insertion hole portion.

[0008] The bracket of the stove according to claim 3 includes a burner fixing portion to which the burner is fixed, and the burner includes a top plate support portion that supports the top plate from below, the top plate support portion is provided with fixing holes into which screws can be inserted from above, and the top plate may be fixed by the screws inserted into the fixing holes.

[0009] A method for assembling a stove according to claim 4, comprising: a top plate supported on the upper part of a housing; a burner provided on the upper surface of the top plate; a bracket mounted below the top plate and inside the housing; an infrared temperature sensor fixed to the bracket, which receives infrared radiation emitted from the bottom surface of an object to be heated placed on a trivet installed around the burner using two infrared light receiving elements, and measures the temperature of the bottom surface based on the intensity of the received infrared radiation; and a circular opening provided on the top plate at a position where the optical axes of the two infrared light receiving elements intersect and pass through. The bracket is provided with a circular insertion hole located coaxially with the opening in a plan view, into which a positioning rod can be inserted, and the method comprises: a first step of fixing the bracket inside the housing; a second step of inserting the positioning rod into the insertion hole through the opening while the top plate is supported on the upper part of the housing; a third step of adjusting the position of the bracket if the positioning rod cannot be inserted into the insertion hole through the opening in the second step; and a fourth step of pulling out the positioning rod that protrudes upward from the opening. [Effects of the Invention]

[0010] According to the stove of claim 1, the positioning of the infrared temperature sensor and the opening can be precisely controlled. The optical axes of the two infrared light-receiving elements intersect and pass through the opening. Therefore, the two infrared light-receiving elements can properly receive infrared radiation emitted from the object being heated through the opening. Thus, the stove can accurately measure the temperature of the bottom surface of the object being heated using the infrared temperature sensor.

[0011] According to the stove of claim 2, for example, if the bracket is misaligned with respect to the opening in the top plate, the worker can remove the top plate and then loosen the fastener. After that, when the top plate is reattached, the positioning rod and the top plate move and correct the bracket. The worker can then insert a screwdriver into the inside of the positioning rod and tighten the fastener to secure the bracket. This allows the worker to install the infrared temperature sensor in the correct position inside the housing.

[0012] According to the stove of claim 3, since the burner is provided with a top plate support portion, the positioning of the top plate and the infrared temperature sensor in the height direction can be accurately performed. Furthermore, by providing fixing holes in the top plate support portion, the top plate is fixed to the top plate support portion, so that the displacement between the opening of the top plate and the infrared temperature sensor can be reduced.

[0013] According to the method for assembling the stove of claim 4, by performing each of the above steps, the effects described in claim 1 can be obtained.

Brief Description of the Drawings

[0014] [Figure 1] It is a perspective view of the gas stove 1. [Figure 2] It is a perspective view of the gas stove 1 (without a hearth). [Figure 3] It is a plan view of the gas stove 1 (without a hearth). [Figure 4] It is an exploded perspective view of the gas stove 1 (without a hearth). [Figure 5] It is a plan view showing the internal structure of the housing 2. [Figure 6] It is a sectional view taken along the arrow I-I direction shown in FIG. 5. [Figure 7] It is a perspective view showing the structure of the upper surface of the middle bottom plate 10. [Figure 8] It is a perspective view of the middle bottom plate 10. [Figure 9] It is a perspective view of the infrared temperature sensor 51. [Figure 10] It is a perspective view of the bracket 61. [Figure 11] It is a perspective view of the bracket 61 viewed from a different angle from FIG. 10. [Figure 12] It is a perspective view of the infrared detection unit U1. [Figure 13] It is a perspective view of the state where the infrared detection unit U1 is fixed to the upper surface of the middle bottom plate 10. [Figure 14] It is a plan view of the state where the infrared detection unit U1 is fixed to the upper surface of the middle bottom plate 10. [Figure 15]It is a perspective view looking down from the left rear of the gas stove 1 with the positioning rod 80 inserted into the openings 312, 322, 332, and 342. [Figure 16] It is a sectional view taken in the direction of the arrow II-II shown in Fig. 15. [Figure 17] It is a perspective view showing a state where infrared rays radiated from the heated object W on the trivet 4 are guided to the infrared temperature sensor 51 through the opening 312. [Figure 18] It is a plan view showing a state where infrared rays R1 and R2 radiated from the heated object W on the trivet are guided to the infrared temperature sensor 51 through the opening 312.

Embodiments for Carrying Out the Invention

[0015] Hereinafter, embodiments of the present invention will be described. The devices, component configurations, etc. described below are not intended to be limited thereto only without specific descriptions, but are merely illustrative examples. The drawings are used to explain the technical features that the present invention can adopt. In this embodiment, the front-back, left-right, and up-down directions shown in the figures are used for the explanation. Also, the scales of the respective figures do not necessarily match each other, and are appropriately enlarged or reduced according to the object to be illustrated.

[0016] Referring to Figs. 1 and 2, the configuration of the gas stove 1 will be described. The gas stove 1 is a built-in stove and is attached to a kitchen counter (not shown). The gas stove 1 includes a housing 2 and a top plate 3. The top plate 3 is fixed to the upper part of the housing 2. A trivet 4 is installed on the upper surface of the top plate 3.

[0017] The structure of the top plate 3 will now be described. As shown in Figures 2 to 4, the top plate 3 is roughly rectangular in plan view. A cooktop area 3A is provided on the upper right side of the top plate 3, and a cooktop area 3B is provided on the upper left side. Cooktop areas 3A and 3B are roughly rectangular areas that are recessed downwards and are long in the front-to-back direction in plan view. As shown in Figure 4, a burner mounting base 31 is provided on the front side of cooktop area 3A, and a burner mounting base 32 is provided on the rear side. A burner mounting base 33 is provided on the front side of cooktop area 3B, and a burner mounting base 34 is provided on the rear side. The burner mounting bases 31 to 34 are roughly frustoconical in shape, and a roughly circular plane is formed on their upper surface in plan view.

[0018] A roughly circular through-hole 311 is provided in the center of the upper surface 31A of the burner mounting base 31. The upper part of the burner body 5A, described later and located inside the housing 2, is positioned inside the through-hole 311. The burner head 5B is installed on the upper surface 31A. The burner head 5B is attached to the upper part of the burner body 5A via the through-hole 311. The burner body 5A and the burner head 5B constitute the central burner 5 (see Figure 2). An igniter electrode 501 and a thermocouple 502 (see Figure 5) are provided near the burner head 5B.

[0019] As shown in Figure 4, on the upper surface 31A, an opening 312 is provided behind the insertion hole 311. The opening 312 is a round hole smaller than the insertion hole 311. The opening 312 is located at a position where the optical axis of the infrared R1 of the first light-receiving element 58 (see Figure 9) and the optical axis of the infrared R2 of the second light-receiving element 59 of the infrared temperature sensor 51, which will be described later and is provided inside the housing 2, intersect and pass through (see Figure 17). Furthermore, on the upper surface 31A, a pair of fixing holes 314 and 315 are provided so as to sandwich the insertion hole 311 in the center.

[0020] Similar to the burner mounting base 31, a through-hole 321 is provided in the center of the upper surface 32A of the burner mounting base 32. Inside the through-hole 321 is the upper part of the burner body 6A, which will be described later and is located inside the housing 2. The burner head 6B is located on the upper surface 32A. The burner head 6B is attached to the upper part of the burner body 6A via the through-hole 321. The burner body 6A and the burner head 6B constitute the medium burner 6 (see Figure 2). On the upper surface 32A, an opening 322 is provided behind the through-hole 321. The opening 322 is located at a position where the two infrared light axes of the infrared temperature sensor 52, which will be described later and is located inside the housing 2, intersect and pass through. Furthermore, on the upper surface 32A, a pair of fixing holes 324 and 325 are provided so as to sandwich the through-hole 321 in the center.

[0021] An insertion hole 331 is provided in the center of the upper surface 33A of the burner mounting base 33. The upper part of the burner body 7A, described later and installed inside the housing 2, is positioned inside the insertion hole 331. The burner head 7B is installed on the upper surface 33A. The burner head 7B is attached to the upper part of the burner body 7A via the insertion hole 331. The burner body 7A and the burner head 7B constitute a small burner 7 (see Figure 2). On the upper surface 33A, an opening 332 is provided behind the insertion hole 331. The opening 332 is located at a position where the two infrared light axes of the infrared temperature sensor 53, described later and installed inside the housing 2, intersect and pass through. Furthermore, on the upper surface 33A, a pair of fixing holes 334 and 335 are provided so as to sandwich the insertion hole 331 in the center.

[0022] An insertion hole 341 is provided in the center of the upper surface 34A of the burner mounting base 34. The upper part of the burner body 8A, described later and installed inside the housing 2, is positioned inside the insertion hole 341. The burner head 8B is installed on the upper surface 34A. The burner head 8B is attached to the upper part of the burner body 8A via the insertion hole 341. The burner body 8A and the burner head 8B constitute the large burner 8 (see Figure 2). On the upper surface 34A, an opening 342 is provided behind the insertion hole 341. The opening 342 is provided at a position where the two infrared optical axes of the infrared temperature sensor 54, described later and installed inside the housing 2, intersect and pass through. Furthermore, on the upper surface 34A, a pair of fixing holes 344 and 345 are provided so as to sandwich the insertion hole 341 in the center.

[0023] The medium burners 5 and 6, the small burner 7, and the large burner 8 are Bunsen combustion type external flame burners. The burner bodies 5A, 6A, 7A, and 8A are formed in a roughly cylindrical shape with a bottom that opens upward. As shown in Figure 5, a pair of top plate support parts 511 and 512 are provided on the upper edge of the burner body 5A at positions opposite each other. The top plate support parts 511 and 512 protrude radially outward from the upper edge of the burner body 5A and are formed in a roughly triangular shape in plan view. A fixing hole 513 is provided in the center of the top plate support part 511, and a fixing hole 514 is provided in the center of the top plate support part 512.

[0024] Although not described in detail here, similar to the top plate support sections 511 and 512 of the burner body 5A, the burner body 6A is provided with a pair of top plate support sections 601 and 602. The burner body 7A is provided with a pair of top plate support sections 711 and 712. The burner body 8A is provided with a pair of top plate support sections 811 and 812.

[0025] Burner heads 5B, 6B, 7B, and 8B are equipped with multiple flame ports arranged in an annular, outward-facing configuration. These multiple flame ports eject flames outwards.

[0026] As shown in Figures 1 to 3, four control knobs 11 to 14 are provided on the front upper surface of the top plate 3, spaced apart from right to left, in order from right to left. Control knobs 11 and 12 are positioned in front of the cooktop area 3A. Control knobs 13 and 14 are positioned in front of the cooktop area 3B. Control knobs 11 and 12 are connected to the heat control devices 41 and 42, respectively, located inside the housing 2, via round holes 35 and 36 (see Figure 4) provided on the right half of the front front of the top plate 3. Control knobs 13 and 14 are connected to the heat control devices 43 and 44, respectively, located inside the housing 2, via round holes 37 and 38 (see Figure 4) provided on the left half of the front front of the top plate 3. These control knobs 11 to 14 rotate around the corresponding rotating shafts 40A (see Figures 4 and 5).

[0027] The user can rotate the control knob 11 to ignite, extinguish, and adjust the flame of the medium burner 5. The user can rotate the control knob 12 to ignite, extinguish, and adjust the flame of the medium burner 6. The user can rotate the control knob 13 to ignite, extinguish, and adjust the flame of the small burner 7. The user can rotate the control knob 14 to ignite, extinguish, and adjust the flame of the large burner 8.

[0028] The internal structure of the enclosure 2 will be described with reference to Figures 4 to 7. As shown in Figure 4, the enclosure 2 is a roughly rectangular parallelepiped with an open top. The enclosure 2 has a right wall 21, a left wall 22, a front wall 23, a back wall 24, and a bottom wall 25. As shown in Figures 4 and 6, a middle bottom plate 10 is mounted roughly horizontally at a position roughly in the middle in the vertical direction inside the enclosure 2. The middle bottom plate 10 divides the inside of the enclosure 2 into an upper space A1 and a lower space A2 (see Figure 6). In the lower space A2, the controller is located at the rear of the right end of the upper surface of the bottom wall 25. (Figure not shown) is attached.

[0029] As shown in Figures 6 and 7, in the upper space A1, the upper surface of the middle bottom plate 10 is fitted with a gas pipe connection 16, a gas supply pipe 17, four heat control devices 41-44, two solenoid valve units 47 and 48, four infrared detection units U1-U4, and the like.

[0030] The gas pipe connection section 16 is fixed to the left rear corner of the upper surface of the middle bottom plate 10. The downstream end of a gas inlet pipe (not shown) extending from the lower space is connected to the inlet of the gas pipe connection section 16. In the lower space A2, the upstream end of the gas inlet pipe is connected to a gas inlet section (not shown) provided in the bottom wall 25. A main gas solenoid valve (not shown) is provided in the gas inlet section. The main gas solenoid valve is connected to the controller 100. A gas pipe (not shown) extending from the outside is connected to the gas inlet section.

[0031] As shown in Figures 5 and 7, the gas supply pipe 17 is connected to the outlet of the gas pipe connection 16. The gas supply pipe 17 extends forward from the gas pipe connection 16 near the inner surface of the left wall 22, bends to the right just before the rear surface of the front wall 23, and extends to near the inner surface of the right wall 21. The gas supply pipe 17 is fixed to the upper surface of the middle bottom plate 10.

[0032] The flame control devices 41-44 will now be described. As shown in Figures 5 and 7, the flame control devices 41-44 are fixed to the upper surface of the middle bottom plate 10 and close to the rear surface of the front wall 23, at four locations corresponding to the respective operating knobs 11-14. The flame control devices 41-44 are connected to the gas supply pipe 17. The flame control devices 41-44 are equipped with a rotating shaft 40A that protrudes upward. The operating knobs 11-14 are connected to the corresponding rotating shaft 40A via round holes 35-38 provided on the front side of the top plate 3. Flame control device 41 adjusts the flame of the middle burner 5 by rotating the operating knob 11. Flame control device 42 adjusts the flame of the middle burner 6 by rotating the operating knob 12. Flame control device 43 adjusts the flame of the small burner 7 by rotating the operating knob 13. The flame control device 44 adjusts the flame of the large burner 8 by rotating the control knob 14.

[0033] The heat control device 41 includes a safety valve (not shown), a rotating shaft 40A, a needle valve (not shown), an igniter switch (not shown), and the like. The heat control device 41 has a gas flow path inside.

[0034] A safety valve is installed in the gas flow path. The safety valve is a magnetic safety valve and is elastically biased to a closed state that closes the gas flow path. When the safety valve is opened by a slider that is linked to the pushing operation of the operating knob 11, it is maintained in the open state by the electromotive force of the thermocouple 502. The thermocouple 502 generates an electromotive force when heated by the flame of the central burner 5. When the central burner 5 is extinguished, the electromotive force of the thermocouple 502 disappears, so the safety valve closes and the gas flow path is closed.

[0035] The rotating shaft 40A protrudes upward from the front side of the flame control device 41. An operating knob 11 is fixed to the upper end of the rotating shaft 40A. The rotating shaft 40A rotates together with the operating knob 11. The needle valve adjusts the flow area of ​​the gas flow path as the rotating shaft 40A rotates. The igniter switch turns the igniter (not shown) on and off in response to the pushing operation of the operating knob 11. An igniter electrode 501 is connected to the igniter.

[0036] Although not explained here, the other flame control devices 42-44 are equipped with a safety valve, a rotating shaft 40A, a needle valve, an igniter switch, etc., similar to flame control device 41.

[0037] The solenoid valve units 47 and 48 will now be described. As shown in Figures 5 and 7, the solenoid valve unit 47 is fixed to the right rear of the flame control device 41 on the upper surface of the middle bottom plate 10. A gas supply pipe 411 is connected between the flame control device 41 and the solenoid valve unit 47. A gas supply pipe 421 is connected between the flame control device 42 and the solenoid valve unit 47. A gas supply pipe 412 is connected between the solenoid valve unit 47 and the burner body 5A. A gas supply pipe 422 is connected between the solenoid valve unit 47 and the burner body 6A.

[0038] The solenoid valve unit 47 includes a first flow path and a second flow path (not shown). Gas flowing in from the gas supply pipe 411 flows through the first flow path. The first flow path is equipped with a gas shut-off valve (not shown) and a heat output switching valve (not shown). These gas shut-off valve and heat output switching valve are connected to the controller 100. The gas that has flowed through the first flow path flows through the gas supply pipe 412 and flows into the burner body 5A. On the other hand, gas flowing in from the gas supply pipe 421 flows through the second flow path. The second flow path is equipped with a gas shut-off valve (not shown). The gas shut-off valve is connected to the controller 100. The gas that has flowed through the second flow path flows through the gas supply pipe 422 and flows into the burner body 6A.

[0039] The solenoid valve unit 48 is fixed to the right rear of the flame control device 43 on the upper surface of the middle bottom plate 10. A gas supply pipe 431 is connected between the flame control device 43 and the solenoid valve unit 48. A gas supply pipe 441 is connected between the flame control device 44 and the solenoid valve unit 48. A gas supply pipe 432 is connected between the solenoid valve unit 48 and the burner body 7A. A gas supply pipe 442 is connected between the solenoid valve unit 48 and the burner body 8A. Note that the internal structure of the solenoid valve unit 48 is the same as that of the solenoid valve unit 47, so a description is omitted.

[0040] The infrared detection units U1 to U4 will now be described. As shown in Figures 5 and 7, the infrared detection units U1 to U4 are fixed to the upper surface of the middle base plate 10. The infrared detection units U1 to U4 detect the temperature of the heated object W based on the infrared intensity emitted from the heated object W.

[0041] The infrared detection unit U1 is fixed to the front right side of the upper surface of the middle base plate 10. The infrared detection unit U1 includes an infrared temperature sensor 51 and a bracket 61. The infrared temperature sensor 51 is mounted inside the bracket 61. The infrared temperature sensor 51 is attached to the upper surface of the middle base plate 10 by screwing the bracket 61 to the upper surface of the middle base plate 10. The bracket 61 is provided with a columnar fixing column 611 that extends in the vertical direction. The annular burner body 5A is fixed to the upper surface 612 (see Figure 10) of the fixing column 611. The specific structures of the infrared temperature sensor 51 and the bracket 61 will be described later.

[0042] The infrared detection unit U2 is fixed to the rear right side of the upper surface of the middle base plate 10. Like the infrared detection unit U1, the infrared detection unit U2 includes an infrared temperature sensor 52 and a bracket 62. The infrared temperature sensor 52 is mounted inside the bracket 62. The infrared temperature sensor 52 is attached to the upper surface of the middle base plate 10 by screwing the bracket 62 to the upper surface of the middle base plate 10. The bracket 62 is provided with a columnar fixing column 621 that extends in the vertical direction. The annular burner body 6A is fixed to the upper surface of the fixing column 621.

[0043] The infrared detection unit U3 is fixed to the front left portion of the upper surface of the middle base plate 10. Like the infrared detection unit U1, the infrared detection unit U3 also includes an infrared temperature sensor 53 and a bracket 63. The infrared temperature sensor 53 is mounted inside the bracket 63. The infrared temperature sensor 53 is attached to the upper surface of the middle base plate 10 by screwing the bracket 63 to the upper surface of the middle base plate 10. The bracket 63 is provided with a columnar fixing column 631 that extends in the vertical direction. The annular burner body 7A is fixed to the upper surface of the fixing column 631.

[0044] The infrared detection unit U4 is fixed to the rear left side of the upper surface of the middle base plate 10. Like the infrared detection unit U1, the infrared detection unit U4 also includes an infrared temperature sensor 54 and a bracket 64. The infrared temperature sensor 54 is mounted inside the bracket 64. The infrared temperature sensor 54 is attached to the upper surface of the middle base plate 10 by screwing the bracket 64 to the upper surface of the middle base plate 10. The bracket 64 is provided with a columnar fixing column 641 that extends in the vertical direction. The annular burner body 8A is screwed to the upper surface of the fixing column 641.

[0045] Referring to Figure 8, the specific shape of the middle base plate 10 will be described. The middle base plate 10 is approximately rectangular in plan view. A contact piece 18 is provided at the front end of the middle base plate 10. The contact piece 18 is bent from the front end of the middle base plate 10 in a roughly L-shape in cross-section, with its tip protruding upward. Contact pieces 19A, 19B, and 19C are provided at the right end, left end, and rear end of the middle base plate 10. When the middle base plate 10 is installed in the middle position of the housing 2, the contact pieces 18 contact the inner surface of the front wall 23. Contact piece 19A contacts the inner surface of the right wall 21. Contact piece 19B contacts the inner surface of the left wall 22. Contact piece 19C contacts the inner surface of the back wall 24.

[0046] The inner base plate 10 is provided with four sensor openings 12 to 15. The sensor openings 12 to 15 are roughly rectangular in plan view. Sensor opening 12 is located on the front right side of the inner base plate 10. Sensor opening 13 is located on the rear right side of the inner base plate 10. Sensor opening 14 is located on the front left side of the inner base plate 10. Sensor opening 15 is located on the rear left side of the inner base plate 10.

[0047] In the middle base plate 10, a pair of fixing holes 201 and 202 are provided at positions that sandwich the sensor opening 12 from both the left and right sides. An engagement hole 301 is provided behind the right fixing hole 201, and an engagement hole 302 is provided in front of the left fixing hole 202. A pair of fixing holes 203 and 204 are provided at positions that sandwich the sensor opening 13 from both the left and right sides. An engagement hole 303 is provided behind the right fixing hole 203, and an engagement hole 304 is provided in front of the left fixing hole 204.

[0048] A pair of fixing holes 205 and 206 are provided at positions that sandwich the sensor opening 14 from both the left and right sides. An engagement hole 305 is provided behind the right fixing hole 205, and an engagement hole 306 is provided behind the left fixing hole 206. A pair of fixing holes 207 and 208 are provided at positions that sandwich the sensor opening 15 from both the left and right sides. An engagement hole 307 is provided in front of the right fixing hole 207, and an engagement hole 308 is provided in front of the left fixing hole 208.

[0049] Referring to Figure 9, the structure of the infrared temperature sensor 51 will be described in detail. Since infrared temperature sensors 51 to 54 all have the same structure, in this embodiment only the structure of infrared temperature sensor 51 will be described. Also, in Figure 9, in order to explain the structure of infrared temperature sensor 51 in an easy-to-understand manner, the side where the opening 551 of the body 55 (described later) is provided is defined as the front, and the direction of the infrared temperature sensor 51 is defined accordingly.

[0050] The infrared temperature sensor 51 includes a body 55, a cover 56, a light-transmitting window 57, a first light-receiving element 58, a second light-receiving element 59, a circuit board 120, and the like.

[0051] The body 55 is formed in a box shape with an open top. A support portion 550 is provided at the bottom of the body 55. The support portion 550 supports the body 55 at an incline such that the front end of the body 55 is lower than the rear end. A rectangular opening 551 is provided on the front of the body 55. A lid portion 552 is inserted and fixed into the opening 551 from the front.

[0052] A fixing plate 95 is provided on the right side of the body 55. The fixing plate 95 protrudes to the right from the right side of the body 55. The fixing plate 95 is roughly rectangular in shape, elongated in the front-to-back direction when viewed from above. A fitting hole 951 and a fixing hole 952 are provided on the upper surface of the fixing plate 95. The fitting hole 951 is located at the front end of the fixing plate 95, and the fixing hole 952 is located behind the fitting hole 951. The fixing hole 952 penetrates the fixing plate 95 in the vertical direction. A screw 97 is inserted into the fixing hole 952 from below.

[0053] A fixing plate 96 is also provided on the left side of the body 55. The fixing plate 96 protrudes to the left from the left side of the body 55. The fixing plate 96 is also roughly rectangular in shape, elongated in the front-to-back direction when viewed from above. A fitting hole 961 and a fixing hole 962 are provided on the upper surface of the fixing plate 96. The fitting hole 961 is located on the front end side of the fixing plate 96, and the fixing hole 962 is located behind the fitting hole 961. The fixing hole 962 penetrates the fixing plate 96 in the vertical direction. A screw 98 is inserted into the fixing hole 962 from below. These fixing plates 95 and 96 are positioned higher than the opening 551 and the cover portion 552 of the body 55.

[0054] The cover 56 is fixed to the opening upper surface of the body 55. The light-transmitting window 57 is provided in the center of the cover 56. The light-transmitting window 57 is formed in a roughly rectangular flat shape and transmits infrared rays.

[0055] The first light-receiving element 58 and the second light-receiving element 59 are housed in the front end of the body 55. The first light-receiving element 58 and the second light-receiving element 59 are, for example, photodiodes or thermopiles, and output an electrical signal corresponding to the intensity of the infrared light they receive. The electrical signal is a voltage. The first light-receiving element 58 and the second light-receiving element 59 receive infrared light that is emitted from the bottom region of the heated object W (see Figure 17) placed on the trivet 4 and passes through the opening 312 and the light-transmitting window 57.

[0056] The circuit board 120 is housed inside the lid 552. The circuit board 120 performs drive control of the first light-receiving element 58 and the second light-receiving element 59, electrical signal processing, calculation processing, judgment processing, etc. The circuit board 120 is electrically connected to the controller 100.

[0057] As described above, the infrared temperature sensor 51 is fixed to the upper surface of the middle bottom plate 10 inside the housing 2 via a bracket 61 (see Figures 13 and 14). As shown in Figure 9, the light-transmitting window 57 is positioned in an area away from the vertically downward region of the opening 312 of the top plate 3. Furthermore, the light-transmitting window 57 is positioned at an angle such that the normal vector N passing through the center of the light-transmitting window 57 is directed toward the opening 312. This prevents foreign matter such as spilled broth or solids from falling directly onto the light-transmitting window 57 even if it enters the housing 2 through the opening 312. Even if broth or other liquids splash and adhere to the light-transmitting window 57, they will naturally drip down along its inclined surface, preventing them from solidifying and remaining on the surface of the light-transmitting window 57.

[0058] Referring to Figures 10 and 11, the structure of bracket 61 will be explained in detail. Since brackets 61 to 64 have similar structures, in this embodiment only the structure of bracket 61 will be explained. Furthermore, for the sake of explanation, the definition of the direction of bracket 61 shown in Figures 10 and 11 will be aligned with the definition of the direction of the infrared temperature sensor 51 attached to bracket 61 (see Figure 9). Therefore, the definition of the direction of bracket 61 shown in Figures 10 and 11 does not coincide with the definition of the direction in Figures 1 to 8, etc.

[0059] The bracket 61 comprises a frame 67, a flange 68, and a fixing column 611. The frame 67 is a frame that is substantially rectangular in plan view. The frame 67 has a predetermined height in the vertical direction. A cylindrical portion 670 is provided on the front surface of the frame 67. The cylindrical portion 670 is a substantially cylindrical shape with a bottom that extends in the vertical direction.

[0060] A circular insertion hole 671 is provided in the center of the cylindrical portion 670. The insertion hole 671 extends in the vertical direction. A circular mounting hole 681 is provided in the center of the bottom surface 672 of the insertion hole (see Figure 16). A screw 79 is inserted into the mounting hole 681 from above. The diameter of the mounting hole 681 is larger than the diameter of the threaded portion of the screw 79. Therefore, a small amount of play is formed between the screw 79 and the mounting hole 681.

[0061] The flange 68 protrudes substantially horizontally outward from the lower end of the frame 67. The flange 68 comprises a front portion 61A, a rear portion 61B, a right portion 61C, and a left portion 61D.

[0062] The cylindrical portion 670 described above is erected in the left-right center of the front portion 61A. The bottom surface 672 of the insertion hole portion 671 of the cylindrical portion 670 is part of the top surface of the front portion 61A. Therefore, the mounting hole 681 provided in the bottom surface 672 penetrates the front portion 61A in the vertical direction. As shown in Figure 11, a projection 687 is provided to the right of the mounting hole 681 on the bottom surface of the front portion 61A, protruding downward. A mounting hole 682 is provided in the left-right center of the rear portion 61B. A projection 688 is provided to the left of the mounting hole 682 on the bottom surface of the rear portion 61B, protruding downward.

[0063] A protrusion 68A is provided in the center of the front-to-back direction of the lower surface of the right side portion 61C. The protrusion 68A is a roughly rectangular area that is long in the front-to-back direction when viewed from the bottom and is formed to protrude downward. A projection 684 is provided on the front end side of the protrusion 68A, protruding downward. A fixing hole 683 is provided behind the projection 684 on the protrusion 68A.

[0064] A protrusion 68B is provided in the center of the front-to-back direction of the lower surface of the left side portion 61D. The protrusion 68B is also a roughly rectangular area that is long in the front-to-back direction when viewed from the bottom, and is formed to protrude downward. A projection 686 is provided on the front end side of the protrusion 68B, protruding downward. A fixing hole 685 is provided behind the projection 686 on the protrusion 68B.

[0065] The fixing column 611 is provided at the left front corner of the frame 67 and flange 68. The fixing column 611 is columnar and extends upward. As described above, the burner body 5A (see Figure 13) is fixed to the upper surface 612 of the fixing column 611.

[0066] Note that the bracket 62 shown in Figure 7 is the same part as the bracket 61 described above. In bracket 63, the positions of the mounting hole 682 and projection 688 on the rear part 61B of the flange 68 shown in Figure 11 are reversed. In bracket 64, the positions of the mounting hole 681 and projection 687 on the front part 61A of the flange 68 are reversed.

[0067] Referring to Figures 9 to 12, the method for attaching the infrared temperature sensor 51 to the bracket 61 will be explained. Insert the infrared temperature sensor 51 (see Figure 9) from below into the frame 67 of the bracket 61 shown in Figures 10 and 11. At this time, insert the infrared temperature sensor 51 so that the light-transmitting window 57 of the infrared temperature sensor 51 faces the front side of the frame 67 of the bracket 61 (see Figure 12).

[0068] Then, the right-side fixing plate 95 of the infrared temperature sensor 51 is engaged with the protrusion 68A (see Figure 11) provided on the lower surface of the right-side portion 61C of the flange 68 of the bracket 61 to position it. At this time, the projection 684 provided on the protrusion 68A is fitted into the fitting hole 951 of the fixing plate 95. Then, the fixing hole 683 of the protrusion 68A and the fixing hole 952 of the fixing plate 95 overlap, and the screw 97 is fastened from below.

[0069] On the other hand, similar to the right-side fixing plate 95, the left-side fixing plate 96 of the infrared temperature sensor 51 is positioned by engaging it with a protrusion 68B (see Figure 11) provided on the lower surface of the left-side portion 61D of the flange 68 of the bracket 61. At this time, the projection 686 provided on the protrusion 68B is fitted into the fitting hole 961 of the fixing plate 95. The fixing hole 685 of the protrusion 68B and the fixing hole 962 of the fixing plate 96 overlap, so the screw 98 is fastened from below. Note that the protrusions 68A and 68B protrude downwards to adjust the height of the infrared temperature sensor 51.

[0070] In this way, as shown in Figure 12, the infrared temperature sensor 51 is mounted on the bracket 61, and the infrared detection unit U1 is completed. In the infrared detection unit U1, the circuit board 120 provided inside the lid 552 is positioned below the flange 68 of the bracket 61.

[0071] Next, an example of how to assemble the gas stove 1 will be described. In this embodiment, the assembly method of the gas stove 1 will be described in four steps. The first step is a step carried out in the factory, while the second to fourth steps are steps carried out outside the factory, for example, when installing the gas stove 1 on the counter of a typical home kitchen.

[0072] <1st process> The first step is to install various components such as infrared detection units U1 to U4 inside the housing 2. First, the worker installs the gas pipe connection part 16, gas supply pipe 17, four heat control devices 41 to 44, two solenoid valve units 47 and 48, and four infrared detection units U1 to U4, etc., onto the upper surface of the middle bottom plate 10 (see Figure 7).

[0073] Before attaching the four infrared detection units U1 to U4 to the top surface of the middle base plate 10, the worker fixes the burner body 5A to the top surface 612 of the fixing column 611 of the bracket 61 of infrared detection unit U1. Similarly, the burner body 6A is fixed to the top surface of the fixing column 621 of the bracket 62 of infrared detection unit U2. Furthermore, the burner body 7A is fixed to the top surface of the fixing column 631 of the bracket 63 of infrared detection unit U3. Furthermore, the burner body 8A is fixed to the top surface of the fixing column 641 of the bracket 64 of infrared detection unit U4.

[0074] Here, we will specifically explain how to attach the infrared detection unit U1 to the inner base plate 10. First, the worker places the infrared detection unit U1 from above into the sensor opening 12 (see Figure 8) of the inner base plate 10. At this time, the lower half of the infrared temperature sensor 51 is dropped into the sensor opening 12.

[0075] Next, the projection 687 (see Figure 11) provided on the lower surface of the front portion 61A of the flange 68 of the bracket 61 is inserted into the engagement hole 301 (see Figure 8) of the opposing inner base plate 10. Furthermore, the projection 688 provided on the lower surface of the rear portion 61B of the flange 68 is inserted into the engagement hole 302 of the opposing inner base plate 10. This positions the bracket 61 relative to the upper surface of the inner base plate 10. The lower surface of the flange 68 comes into contact with the inner edge of the sensor opening 12.

[0076] Furthermore, a small amount of play is formed between the projection 687 and the engagement hole 301, and between the projection 688 and the engagement hole 302. Therefore, it is permissible to slightly shift the position of the bracket 61 on the upper surface of the middle base plate 10.

[0077] In this state, the mounting hole 681 provided on the lower surface of the front portion 61A of the flange 68 of the bracket 61 aligns with the fixing hole 201 of the inner base plate 10. Then, the mounting hole 682 provided on the lower surface of the rear portion 61B of the flange 68 aligns with the fixing hole 202 of the inner base plate 10.

[0078] Next, the worker inserts a screw 79 (see Figure 14) from above into the insertion hole 671 of the cylindrical portion 670 of the bracket 61. Then, the worker inserts the tip of a screwdriver (not shown) into the insertion hole 671. Using the screwdriver, the worker fastens the screw 79 through the mounting hole 681 of the bracket 61 to the fixing hole 201 of the inner base plate 10.

[0079] Furthermore, the worker uses a tool to insert the screw 78 (see Figure 14) into the mounting hole 682 of the bracket 61 and fasten it to the fixing hole 202 of the inner base plate 10. In this way, as shown in Figures 13 and 14, the bracket 61 is fixed to the upper surface of the inner base plate 10, and the infrared detection unit U1 is fixed to the upper surface of the inner base plate 10.

[0080] Although not explained here, the other infrared detection units U2 to U4 are also attached to the sensor openings 13 to 15 of the middle base plate 10, in the same way as infrared detection unit U1.

[0081] Next, the worker connects the gas supply pipe 411 between the heat control device 41 and the solenoid valve unit 47. Then, the worker connects the gas supply pipe 412 between the solenoid valve unit 47 and the burner body 5A. Next, the worker connects the gas supply pipe 421 between the heat control device 42 and the solenoid valve unit 47. Finally, the worker connects the gas supply pipe 422 between the solenoid valve unit 47 and the burner body 6A.

[0082] Next, the worker connects the gas supply pipe 431 between the heat control device 43 and the solenoid valve unit 48. Then, the worker connects the gas supply pipe 432 between the solenoid valve unit 48 and the burner body 7A. Next, the worker connects the gas supply pipe 441 between the heat control device 44 and the solenoid valve unit 48. Finally, the worker connects the gas supply pipe 442 between the solenoid valve unit 48 and the burner body 8A.

[0083] In this way, various components such as the heat control devices 41-44, solenoid valve units 47, 48, infrared detection units U1-U4, and gas supply pipes are attached to the upper surface of the middle bottom plate 10 (see Figure 7). Next, the worker installs the middle bottom plate 10 with the various components attached into the housing 2 (see Figure 6).

[0084] Then, the worker drops the housing 2, with the inner bottom plate 10 attached to the inside, into an opening provided in, for example, a kitchen counter (not shown) from above, thereby installing the housing 2 on the counter.

[0085] <Second process> The worker inserts the positioning rods 80 into the respective cylindrical portions 670 of the brackets 61-64 fixed to the middle base plate 10. At this time, the four positioning rods 80 are supported in a position where they protrude upward from the brackets 61-64. The positioning rods 80 are cylindrical in shape. The positioning rods 80 have an inner diameter into which a screw 79 can be inserted.

[0086] Next, the top plate 3 is attached to the top of the housing 2. The openings 312, 322, 332, and 342 in the top plate 3 are slightly larger than the positioning rods 80. This slight difference in size is acceptable to allow for some error in the positional relationship with the infrared detection units U1 to U4. This makes it easier to attach the top plate 3 to the top of the housing 2. Therefore, if the four positioning rods 80 can be inserted into the openings 312, 322, 332, and 342 of the top plate 3, the positions of the brackets 61 to 64 can be recognized as correct. In this case, the third step can be omitted, and the process can proceed to the fourth step described later.

[0087] <3rd process> Conversely, if the top plate 3 cannot be attached to the top of the housing 2, it means there is an unacceptable error. In other words, the position of one of the brackets 61 to 64 is misaligned. In this case, the positioning rod 80 inserted into the cylindrical portion 670 of the misaligned bracket interferes with the opening in the top plate 3, making it impossible to attach the top plate 3 to the top of the housing 2. This allows the worker to recognize that the position of one of the brackets 61 to 64 is misaligned with the opening. Therefore, adjustment of the position of brackets 61 to 64 is necessary.

[0088] At this point, the worker cannot determine which of the brackets 61-64 is misaligned. Therefore, the worker loosens the screws 78 and 79 that secure all brackets 61-64 to the bottom plate 10. For screw 79, with the positioning rod 80 inserted into the cylindrical part 670, the screw 79 can be loosened by inserting a screwdriver into the positioning rod 80 from above. Alternatively, the screw 79 can be loosened with the positioning rod 80 removed from the cylindrical part 670. The reason for loosening the screws 78 and 79 of all brackets 61-64 is that it is not necessarily the case that only the bracket corresponding to the interfering opening is misaligned.

[0089] Next, the worker reattaches the top plate 3 to the top of the housing 2 with all screws 78 and 79 on brackets 61-64 still loosened. At this time, the top plate 3 is attached with all four positioning rods 80 inserted into the respective cylindrical parts 760 of brackets 61-64. The four positioning rods 80 are inserted into the openings 312, 322, 332, and 342 of the top plate 3. By attaching the top plate 3 to the top of the housing 2 while correcting the position even if the openings of the top plate 3 interfere with the positioning rods 80, the misaligned brackets move.

[0090] Then, once all four positioning rods 80 have been inserted into the openings 312, 322, 332, and 342 of the top plate 3, the brackets 61-64 will all be in the correct position. The worker then inserts a screwdriver into the inside of the four positioning rods 80 in order and tightens the respective screws 79 to temporarily fasten the brackets 61-64. Furthermore, the worker removes the top plate 3 from the top of the housing 2 and tightens the remaining four screws 78 that fix the brackets 61-64 to the middle bottom plate 10. This completes the adjustment of the positions of the brackets 61-64.

[0091] <4th process> In the fourth step, after the second step or after the third step, with the positions of brackets 61-64 correctly adjusted, the top plate 3 is fixed to the burner bodies 5A, 6A, 7A, and 8A and attached to the top of the housing 2. The worker positions the pair of fixing holes 314 and 315 (see Figure 4) provided on the upper surface 31A of the burner mounting base 31 of the top plate 3 with respect to the fixing holes 513 and 514 (see Figure 7) of the pair of top plate support parts 511 and 512 of the burner body 5A. Furthermore, the worker positions the pair of fixing holes 324 and 325 (see Figure 4) provided on the upper surface 32A of the burner mounting base 32 of the top plate 3 with respect to the fixing holes 613 and 614 (see Figure 7) of the pair of top plate support parts 601 and 602 of the burner body 6A.

[0092] Furthermore, a pair of fixing holes 334, 335 (see Figure 4) provided on the upper surface 33A of the burner mounting base 33 of the top plate 3 are positioned relative to the fixing holes 713, 714 (see Figure 7) of the pair of top plate support parts 711, 712 of the burner body 7A. Furthermore, a pair of fixing holes 344, 345 (see Figure 4) provided on the upper surface 34A of the burner mounting base 34 of the top plate 3 are positioned relative to the fixing holes 813, 814 (see Figure 7) of the pair of top plate support parts 811, 812 of the burner body 8A.

[0093] Then, two screws (not shown) are inserted into a pair of fixing holes 314 and 315 of the burner mounting base 31 of the top plate 3, and fastened to fixing holes 513 and 514 of the pair of top plate support parts 511 and 512 of the burner body 5A. Furthermore, two screws (not shown) are inserted into a pair of fixing holes 324 and 325 of the burner mounting base 32 of the top plate 3, and fastened to fixing holes 613 and 614 of the pair of top plate support parts 601 and 602 of the burner body 6A.

[0094] Furthermore, two screws (not shown) are inserted into a pair of fixing holes 334 and 335 of the burner mounting base 33 of the top plate 3, and fastened to fixing holes 713 and 714 of the pair of top plate support parts 711 and 712 of the burner body 7A. Furthermore, two screws (not shown) are inserted into a pair of fixing holes 344 and 345 of the burner mounting base 34 of the top plate 3, and fastened to fixing holes 813 and 814 of the pair of top plate support parts 811 and 812 of the burner body 8A.

[0095] In this way, the top plate 3 is fixed to the four top plate support parts 511, 512, 601, 602, 711, 712, 811, and 812. In other words, the top plate 3 is indirectly attached to the top of the housing 2 via the burner body 5A, the bracket 61, and the middle bottom plate 10. The top plate 3 is fixed to the top plate support parts 511, 512, 601, 602, 711, 712, 811, and 812 of the brackets 61 to 64. This allows the gas stove 1 to accurately position the top plate 3 in the height direction relative to the infrared temperature sensors 51 to 54 fixed to the brackets 61 to 64.

[0096] With the top plate 3 attached to the top of the housing 2, the four positioning rods 80 protrude upward from the four openings 312, 322, 332, and 342 of the top plate 3. The worker pulls out the four positioning rods 80 from the openings 312, 322, 332, and 342. This completes the assembly of the gas stove 1.

[0097] Referring to Figures 9, 17, and 18, the temperature measurement process using the infrared temperature sensor 51 in the gas stove 1 will be explained. For example, when the middle burner 5 is ignited using the control knob 11 in the gas stove 1, the first light-receiving element 58, the second light-receiving element 59, and the circuit board 120 of the infrared temperature sensor 51 are driven in conjunction with or at an appropriate time thereafter.

[0098] As shown in Figure 17, the object to be heated W is placed on the trivet 4, directly above the central burner 5. Infrared radiation R1 is emitted from the bottom region W1 (see Figure 18) of the object to be heated W. The infrared radiation R1 passes through the opening 312 and the light-transmitting window 57 and is incident on the first light-receiving element 58. On the other hand, infrared radiation R2 is emitted from the bottom region W2 (see Figure 18) of the object to be heated W. The infrared radiation R2 also passes through the opening 312 and the light-transmitting window 57 and is incident on the second light-receiving element 59.

[0099] The first light-receiving element 58 and the second light-receiving element 59 output detection signals according to the intensity of infrared rays R1 and R2 emitted from the heated object W. The circuit board 120 receives the detection signals from the first light-receiving element 58 and the second light-receiving element 59, respectively. The circuit board 120 calculates the temperature of the heated object W based on the two detection signals from the first light-receiving element 58 and the second light-receiving element 59. The circuit board 120 transmits the calculated temperature information of the heated object W to the controller 100. The controller 100 monitors the heating state of the heated object W by continuing this temperature measurement process while the gas stove 1 is in operation.

[0100] In the above description, the fixing column 611 of the bracket 61 is an example of the "burner fixing part" of the present invention. The screw 79 is an example of the "fixing device" of the present invention. The first light-receiving element 58 and the second light-receiving element 59 are examples of the "two infrared light-receiving elements" of the present invention.

[0101] As described above, the gas stove 1 of this embodiment comprises a housing 2 and a top plate 3. The top plate 3 is attached to the top of the housing 2. A middle burner 5 is provided on the upper surface of the top plate 3. A trivet 4 is installed around the middle burner 5. The gas stove 1 heats the object to be heated W placed on the trivet 4. The gas stove 1 further comprises a bracket 61 and an infrared temperature sensor 51. The bracket 61 is attached below the top plate 3 and to the middle bottom plate 10 inside the housing 2. The infrared temperature sensor 51 is fixed to the bracket 61. The infrared temperature sensor 51 receives infrared radiation emitted from the bottom surface of the object to be heated W placed on the trivet 4 using a first light-receiving element 58 and a second light-receiving element 59, and measures the temperature of the bottom surface based on the intensity of the received infrared radiation.

[0102] A circular opening 312 is provided in the top plate 3. The opening 312 is positioned where the optical axes of the first light-receiving element 58 and the second light-receiving element 59 intersect and pass through. A circular insertion hole 671 is provided in the bracket 61. The insertion hole 671 has the same diameter as the opening 312, including dimensional tolerances, and is positioned coaxially with the opening 312 in a plan view. A positioning rod 80 can be inserted into the insertion hole 671. The positioning rod 80 has the same diameter as the opening 312. When the positioning rod 80 is inserted into the insertion hole 671, it protrudes upward from the top plate 3 through the opening 312.

[0103] This allows the operator to accurately position the infrared temperature sensor 51 and the opening 312. Therefore, the gas stove 1 can accurately measure the temperature of the bottom surface of the heated object W using the infrared temperature sensor 51.

[0104] In the above embodiment, a mounting hole 681 is provided on the bottom surface 672 of the insertion hole portion 671. A screw 79 can be inserted into the mounting hole 681 from above. The bracket 61 is fixed inside the housing 2 by the screw 79 via the mounting hole 681. The positioning rod 80 is cylindrical. When the positioning rod 80 is inserted into the insertion hole portion 671, it has an inner diameter that allows the screw 79 to be inserted into the mounting hole 681.

[0105] For example, if the top plate 3 and the infrared temperature sensor 51 are not aligned, the worker removes the top plate 3 and loosens screws 78 and 79. After that, when the top plate 3 is reattached, the positioning rod 80 and the top plate 3 move and correct the bracket 61. The worker inserts a screwdriver into the positioning rod 80 and tightens screw 79 to temporarily fasten the bracket 61, then removes the top plate 3 and tightens screw 78 to secure it. This allows the worker to accurately install the infrared temperature sensor 51 inside the housing 2.

[0106] In the above embodiment, the bracket 61 also includes a fixing column 611. The burner body 5A is fixed to the fixing column 611. The burner head 5B is attached to the burner body 5A to form the middle burner 5. The burner body 5A includes a pair of top plate support parts 511 and 512. The top plate support parts 511 and 512 support the top plate 3 from below. The top plate support parts 511 and 512 are provided with fixing holes 513 and 514 into which screws (not shown) can be inserted from above. The top plate 3 is fixed to the top plate support parts 511 and 512 by screws inserted into the fixing holes 513 and 514, and is attached to the upper part of the housing 2.

[0107] This allows the operator to accurately position the top plate 3 and the infrared temperature sensor 51 in the height direction. Furthermore, by providing fixing holes 513 and 514 in the top plate support parts 511 and 512, misalignment between the opening 312 of the top plate 3 and the infrared temperature sensor 51 can be reduced.

[0108] It should be noted that the present invention is not limited to the above embodiments, and various modifications are possible. The gas stove 1 in the above embodiments is a built-in stove, but it may also be a tabletop stove.

[0109] In the above embodiment, a middle bottom plate 10 is provided inside the housing 2, dividing the inside of the housing 2 into an upper space A1 and a lower space A2. However, the middle bottom plate 10 may be omitted. In that case, the gas pipe connection part 16, gas supply pipe 17, four heat output control devices 41-44, two solenoid valve units 47, 48, and four infrared detection units U1-U4, etc., can be attached to the upper surface of the bottom wall 25 of the housing 2.

[0110] The gas stove 1 is equipped with operating knobs 11 to 14, but these may be replaced with, for example, buttons that can be pressed. Also, the respective rotation shafts 40A of the operating knobs 11 to 14 protrude upward, but the direction of protrusion is not limited to this; for example, they may protrude approximately horizontally towards the front.

[0111] The internal structure of the infrared temperature sensors 51-54 is not limited to the above embodiments. For example, the number of light-receiving elements mounted inside may be one or three or more.

[0112] Four burners are provided on top plate 3, but the number of burners can be freely changed. The size and arrangement of the burners can also be freely changed. [Explanation of symbols]

[0113] 1. Gas stove 2 cabinets 3 Top plate 4 Trivet 5 medium burner 51 Infrared temperature sensor 58 First photodetector 59. Second photodetector 61 Bracket 79 screws 80 Positioning rod 312 Opening 511, 512 Top panel support section 513,514 Fixing hole 611 Fixed column 671 Insertion hole 672 Bottom W Heated object

Claims

1. A stove having a top plate supported on the top of the casing, a burner provided on the upper surface of the top plate, and a heat-generating object placed on a trivet installed around the burner, A bracket mounted below the top plate and inside the housing, An infrared temperature sensor fixed to the bracket, which receives infrared radiation emitted from the bottom surface of the object to be heated placed on the trivet using two infrared light receiving elements, and measures the temperature of the bottom surface based on the intensity of the received infrared radiation, In the top plate, a circular opening is provided at a position where the optical axes of the two infrared light receiving elements intersect and pass through. Equipped with, The bracket is provided with a circular insertion hole located coaxially with the opening in a plan view. A positioning rod can be inserted into the aforementioned insertion hole. The positioning rod, when inserted into the insertion hole, protrudes above the top plate through the opening. A stove characterized by the following.

2. The bottom surface of the aforementioned insertion hole is provided with a mounting hole into which a fastener can be inserted from above. The bracket is fixed inside the housing by the fastener through the mounting hole, The positioning rod is cylindrical and, when inserted into the insertion hole, has an inner diameter that allows the fixing device to be inserted into the mounting hole from above. A stove according to claim 1, characterized by the following:

3. The bracket includes a burner fixing portion to which the burner is fixed. The burner is equipped with a top plate support that supports the top plate from below, The top plate support section is provided with fixing holes into which screws can be inserted from above. The top plate is fixed by the screws inserted into the fixing holes. A stove according to claim 1 or 2, characterized by the above.

4. A method for assembling a stove comprising: a top plate supported on the upper part of the housing; a burner provided on the upper surface of the top plate; a bracket mounted below the top plate and inside the housing; an infrared temperature sensor fixed to the bracket, which receives infrared radiation emitted from the bottom surface of an object to be heated placed on a trivet installed around the burner using two infrared light receiving elements, and measures the temperature of the bottom surface based on the intensity of the received infrared radiation; and a circular opening provided on the top plate at a position where the optical axes of the two infrared light receiving elements intersect and pass through, The bracket is provided with a circular insertion hole located coaxially with the opening in a plan view. A positioning rod can be inserted into the aforementioned insertion hole. The first step is to fix the bracket inside the housing, With the top plate supported on the upper part of the housing, the second step is to insert the positioning rod into the insertion hole through the opening, In the second step, if the positioning rod cannot be inserted into the insertion hole through the opening, a third step is taken to adjust the position of the bracket. A fourth step is to pull out the positioning rod that protrudes upward from the opening. Having A stove assembly method characterized by the following.

Images