JP4907503B2 - Stove burner with sensor - Google Patents

Description

  The present invention relates to a mixing tube, an annular burner body having a rising portion rising from a downstream end of the mixing tube, an annular burner cap placed on the burner body, and a pan bottom temperature sensor protruding above the burner cap And a stove burner with a sensor.

  Conventionally, in a three-necked stove having two large burners and one small burner, one large burner is provided with a pan bottom temperature sensor, and the temperature of the cooking container is detected by the sensor. When it overheats, the burner is extinguished so that the oil is not ignited during frying. However, depending on the user, fried foods may be cooked by a burner other than the sensor-equipped burner, and in order to ensure safety, it is desired that all burners have a pan bottom temperature sensor.

  Here, in a conventional large burner with a pan bottom temperature sensor, the center of the circle (inner periphery center) that is the contour of the inner peripheral surface of the burner body is the center of the circle (outer periphery center) that is the contour of the outer peripheral surface of the burner body. Concentric. Then, an annular wall seated on the outer periphery of the upper surface of the burner body is suspended from the outer periphery of the lower surface of the burner cap, and a flame hole is formed by a groove formed in the annular wall, and the burner body is formed on the inner periphery of the burner cap. A seal cylinder fitted to the inner peripheral surface of the seal cylinder is suspended, and the pan bottom temperature sensor protrudes above the burner cap through the inner peripheral space of the seal cylinder (see, for example, Patent Document 1).

  Moreover, in this thing, the support pipe which supports a pan bottom temperature sensor is being fixed to the fixing tool arrange | positioned in the height which overlaps with the rising part of a burner body in the state concentric with the inner peripheral center of a burner body. It is also possible to arrange the fixture below the lower end height of the rising part of the burner body, but this increases the height of the stove body and increases the length of the support pipe. Cost increases.

By the way, it is difficult to make a small burner with a three-hole stove with a pan bottom temperature sensor having the same structure as the large burner. The reason will be described below. Both sides in the circumferential direction of the rising part of the burner body extend from the center of the burner body to the front of the inner and outer peripheries in order to ensure the support rigidity of the burner body, with the direction from the upstream end to the downstream end of the mixing tube as the front. is doing. Although the lower surfaces of both sides in the circumferential direction of the rising portion are inclined forwardly upward, the height of the lower surface at the position in the front-rear direction matching the center of the inner and outer periphery of the burner body is relatively low. In the case of a small burner, the inner diameter of the burner body is equal to or less than the width of the fixture for the support pipe of the pan bottom temperature sensor, and the riser of the burner body rises to a longitudinal position that matches the inner circumference center of the burner body. If it arrange | positions at the height which overlaps with a part, a fixing tool will interfere with the circumferential direction both sides of a rising part. Therefore, the arrangement height of the fixture must be lowered. As a result, it becomes difficult to reduce the thickness of the stove, and the length of the support pipe becomes long, leading to an increase in cost.
Japanese Patent Laid-Open No. 11-22975

  In view of the above points, the present invention provides a height that overlaps the rising portion of the burner body even when the inner diameter of the burner body is equal to or less than the width of the fixing tool for the support pipe of the pan bottom temperature sensor. An object of the present invention is to provide a burner for a stove with a sensor that can be arranged.

  In order to solve the above problems, the present invention provides a mixing tube, an annular burner body having a rising portion rising from a downstream end of the mixing tube, an annular burner cap mounted on the burner body, and a burner cap A burner for a stove equipped with a pan bottom temperature sensor protruding upward, with the direction from the upstream end to the downstream end of the mixing tube being forward, the lower surfaces of both sides of the rising portion of the burner body rising upward The center of the circle that is the contour of the inner peripheral surface of the burner body is the center of the inner periphery, the center of the circle that is the contour of the outer peripheral surface of the burner body is the center of the outer periphery, and the center of the inner periphery is the center of the outer periphery. On the other hand, an air-fuel mixture passage is formed in the rear part of the burner body that is eccentric to the front and is located behind the center of the inner periphery, and leads the air-fuel mixture from the mixing pipe upward through the rising part. A spacer is interposed between the seat portion, the seat portion that sits on the outer periphery of the upper surface of the burner body, the lower cylinder portion that extends downward from the seat portion and fits on the outer periphery of the burner body, and the seat portion An annular wall that extends upward from the outer periphery and has an upper cylindrical portion that is concentric with the inner circumferential center of the burner body and that is seated on the upper end of the upper cylindrical portion is suspended from the outer peripheral portion of the lower surface of the burner cap. A flame hole is formed by the groove formed on the inner surface of the burner cap, and a seal cylinder fitted to the inner peripheral surface of the burner body is suspended from the inner periphery of the burner cap. A fixing tool that protrudes upward and fixes the support pipe supporting the pan bottom temperature sensor in a state concentric with the inner peripheral center of the burner body is arranged at a height that overlaps with the rising portion of the burner body. To do.

  According to the present invention, the inner peripheral center of the burner body is decentered forward with respect to the outer peripheral center, so that the heights of the lower surfaces of both sides in the circumferential direction of the rising part of the burner body are The height is equal to or close to the upper end of the rising portion. Therefore, even if the inner diameter of the burner body is equal to or less than the lateral width of the fixture for the support pipe of the pan bottom temperature sensor, the fixture does not interfere with both sides in the circumferential direction of the rising portion of the burner body. It can arrange | position in the position as high as possible which overlaps with a rising part. As a result, the stove can be thinned, and the length of the support pipe can be shortened to reduce the cost.

  If the inner peripheral center of the burner body is decentered forward with respect to the outer peripheral center, the width between the inner peripheral surface and the outer peripheral surface becomes narrow at the front portion of the burner body, and an air-fuel mixture passage can be formed in this portion. Disappear. Therefore, when the burner cap is directly placed on the burner body, the distribution of the air-fuel mixture with respect to the flame holes at the front of the burner cap is deteriorated. On the other hand, in the present invention, since the spacer is interposed between the burner body and the burner cap, the air-fuel mixture from the air-fuel mixture passage formed in the rear part of the burner body is distributed all around in the spacer, and the front of the burner cap The distribution of the air-fuel mixture with respect to the flame holes in the part does not deteriorate.

  In addition, since the upper cylindrical portion of the spacer is concentric with the inner peripheral center of the burner body, the annular wall on the outer peripheral portion of the lower surface of the burner cap seated on the upper end of the upper cylindrical portion is also concentric with the inner peripheral center of the burner body. The inner peripheral seal cylinder of the burner cap fitted to the inner peripheral surface of the body is also concentric with the inner peripheral center of the burner body. As a result, the burner cap is arranged concentrically with the pan bottom temperature sensor arranged concentrically with the inner peripheral center of the burner body, and the appearance is kept good.

  Further, in the present invention, it is desirable that a recess that is recessed radially inward (rearward) is formed in the front portion of the upper cylindrical portion of the spacer, and an ignition plug is disposed in the recess. Here, the upper cylinder part and the burner cap are concentric with the inner circumference center of the burner body, and the inner circumference center of the burner body is eccentric forward with respect to the outer circumference center. The front part of the outer periphery protrudes considerably forward from the front part of the outer peripheral surface of the burner body. Therefore, even if the recess is formed in the front portion of the upper cylinder, the burner body does not exist immediately below the recess, and the spark plug can be disposed without causing interference with the burner body in the recess. Furthermore, without increasing the outer diameter of the burner cap, the spark plug can be covered with the burner cap from above, and the spark plug can be protected from boiling.

  Referring to FIG. 1, reference numeral 1 denotes a stove body, and 2 is a top plate that covers the upper surface of the stove body 1. The stove is a three-point stove provided with two large burners (not shown) in addition to the one small burner 4 shown. The small burner 4 is provided with a pan bottom temperature sensor 5 that comes into contact with the bottom surface of a cooking container (not shown) placed on the virtues 3 on the top plate 2 and detects the temperature of the container. Hereinafter, the structure of the small burner 4 will be described in detail.

  The small burner 4 includes a mixing pipe 6 fixed on the pedestal 1 a in the stove body 1, an annular burner body 7 having a rising portion 71 rising from the downstream end of the mixing pipe 6, and a spacer 8 on the burner body 7. And an annular burner cap 9 which is placed via A damper 61 and a gas nozzle 62 inserted into the damper 61 are provided at the upstream end of the mixing pipe 6. Here, assuming that the direction from the upstream end to the downstream end of the mixing pipe 6 is the front, both circumferential side portions 71a of the rising portion 71 extend over the vicinity of the front end of the burner body 7 in order to ensure the support rigidity of the burner body 7. It is extended. And the lower surface 71b of the circumferential direction both sides 71a of the rising part 71 inclines to the front rising.

  Referring to FIG. 4, the center (inner periphery center) 7 a of the circle that is the contour of the inner peripheral surface of the burner body 7 is the center (outer periphery center) 7 b of the circle that is the contour of the outer peripheral surface of the burner body 7. It is eccentric to the front. Then, an air-fuel mixture passage 72 that guides the air-fuel mixture (mixed gas of fuel gas and primary air) from the mixing pipe 6 to the rear of the burner body 7 located behind the inner peripheral center 7 a through the rising portion 71. Is formed.

  The spacer 8 includes a seating portion 81 that sits on the outer peripheral portion of the upper surface of the burner body 7, a lower cylinder portion 82 that extends downward from the seating portion 81 and fits to the outer peripheral surface of the burner body 7, and an upper portion from the outer periphery of the seating portion 81. The upper cylinder part 83 which extends, and the annular collar part 84 which protrudes outward from the outer periphery of the upper cylinder part 83 and covers the opening for burners opened in the top plate 2 from above are provided. Fixing portions 81 a that project radially inward are formed at two locations in the circumferential direction of the seating portion 81. Then, as shown in FIG. 5, a screw hole 73 corresponding to the fixing portion 81a is formed in the burner body 7, and the spacer 8 is screwed to the burner body 7 at the fixing portion 81a.

  The upper cylinder part 83 is concentric with the inner peripheral center 7a of the burner body 7, as shown in FIG. In addition, a recess 83 a that is recessed inward (backward) in the radial direction is formed in the front portion of the upper cylinder portion 83. And the ignition plug 10 and the thermocouple 11 for flame detection are arrange | positioned in the hollow part 83a. Here, when the upper cylinder part 83 is concentric with the inner circumference center 7a over the entire circumference, the inner circumference center 7a of the burner body 7 is eccentric forward with respect to the outer circumference center 7b. The front side portion of the burner body 7 projects considerably forward from the front side portion of the outer peripheral surface of the burner body 7. Therefore, even if the depression 83a is formed in the front portion of the upper cylinder 83, the burner body 7 does not exist immediately below the depression 83a, and the ignition plug does not interfere with the burner body 7 in the depression 83a. 10 and the thermocouple 11 can be arranged. The spark plug 10 and the thermocouple 11 are fixed by clips 12a to brackets 12 that are screwed to boss portions 74 that are suspended from the front lower surface of the burner body 7.

  An annular wall 91 seated on the upper end of the upper cylinder portion 83 of the spacer 8 is suspended from the outer peripheral portion of the lower surface of the burner cap 9. A plurality of grooves are formed in the annular wall 91 at intervals in the circumferential direction, and a flame hole 92 is configured by these grooves. Further, in the same manner as the hollow portion 83a of the upper tube portion 83, a hollow portion 91a that is recessed inward in the radial direction is provided on the front side portion of the annular wall 91, facing the hollow portion 91a for ignition. A flame hole 92 'for detecting a flame is formed. A groove portion 83 b is formed at one place in the circumferential direction on the inner peripheral surface of the upper cylinder portion 83. Then, a protrusion (not shown) that engages with the groove 83b is formed on the annular wall 91, and the burner cap 9 is prevented from rotating at a phase in which the recess 91a of the annular wall 91 matches the recess 83a of the upper cylinder 83. To be.

  Further, on the inner periphery of the burner cap 9, a seal cylinder 93 that is fitted to the inner peripheral surface of the burner body 7 is suspended. Then, the air-fuel mixture from the air-fuel mixture passage 72 of the burner body 7 is distributed over the entire circumference in the space between the seal cylinder 93 and the upper cylinder portion 83 of the spacer 8 and is ejected from the flame hole 92. If the inner peripheral center 7a of the burner body 7 is decentered forward with respect to the outer peripheral center 7b, the width between the inner peripheral surface and the outer peripheral surface becomes narrow at the front portion of the burner body 7, and the air-fuel mixture is mixed in this portion. A passage cannot be formed. Therefore, if the burner cap 9 is directly placed on the burner body 7, the distribution of the air-fuel mixture with respect to the flame holes 92 in the front portion of the burner cap 9 is deteriorated. On the other hand, in this embodiment, since the spacer 8 is interposed between the burner body 7 and the burner cap 9, a sufficient distribution space is ensured between the burner body 7 and the burner cap 9. The distribution of the air-fuel mixture with respect to the front flame hole 92 does not deteriorate.

  In addition, the front portion of the burner cap 9 protrudes above a recessed portion 83 a formed in the front portion of the upper cylinder portion 83. Therefore, without increasing the outer diameter of the burner cap 9, the spark plug 10 and the thermocouple 11 arranged in the recess 83a are covered with the burner cap 9 from above, and the simmered juice is applied to the spark plug 10 and the thermocouple 11. Can be prevented. In addition, in order to prevent the simmered juice that has fallen on the burner cap 9 from flowing around the lower surface and falling to the placement portion of the spark plug 10 and the thermocouple 11, the outer peripheral portion on the front side of the upper surface of the burner cap 9 is A bank portion 94 is projected.

  The pan bottom temperature sensor 5 protrudes above the burner cap 9 through the inner circumferential space of the seal cylinder 93. Here, since the upper cylindrical portion 83 of the spacer 8 is concentric with the inner peripheral center 7 a of the burner body 7, the annular wall 91 on the outer peripheral portion of the lower surface of the burner cap 9 seated on the upper end of the upper cylindrical portion 83 is also formed on the burner body 7. The seal cylinder 93 on the inner periphery of the burner cap 9 that is concentric with the inner peripheral center 7 a and fitted to the inner peripheral surface of the burner body 7 is also concentric with the inner peripheral center 7 a of the burner body 7. As a result, even if the inner peripheral center 7a is eccentric with respect to the outer peripheral center 7b of the burner body 7, the burner cap 9 is arranged concentrically with the pan bottom temperature sensor 5 arranged concentrically with the inner peripheral center 7a of the burner body 7. As a result, the appearance is kept good.

  The pan bottom temperature sensor 5 is attached to the upper end of a support pipe 51 that is long in the vertical direction in a state of being biased upward by a spring not shown. When the cooking container is placed on Gotoku 3, the pan bottom temperature sensor 5 is pushed down by the abutment of the bottom surface of the cooking container to the upper end thereof, and the pan bottom temperature sensor 5 is brought into close contact with the bottom surface of the cooking container by the pressing reaction force. Thus, the temperature of the cooking container is detected. The detection signal of the pan bottom temperature sensor 5 is input to a stove controller (not shown) via a lead wire 52 led out from the lower end of the support pipe 51. And when the temperature detected by the pan bottom temperature sensor 5 becomes equal to or higher than a predetermined allowable upper limit temperature, the burner 4 is extinguished to prevent overheating of the cooking container.

  The support pipe 51 is fixed to a fixture 13 disposed at a height overlapping with the rising portion 71 of the burner body 7 in a state concentric with the inner peripheral center 7 a of the burner body 7. The fixture 13 includes a bracket 131 attached to the pedestal 1a for the burner 4 in the stove main body 1 in a standing state, and a pressing plate 132 that sandwiches the support pipe 51 between the bracket 131. The holding plate 132 is screwed to the bracket 131 at the other side portion in the lateral direction with the claw piece 132a protruding from one lateral end thereof being engaged with the engagement hole 131a formed in the bracket 131. In addition, flanges 131b and 132b for preventing the spilled juice flowing down through the support pipe 51 from coming into contact with the lead wire 52 are formed at the upper ends of the bracket 131 and the presser plate 132. Bending portions 131c that engage with the upper edge of the presser plate 132 are formed on both lateral sides of the upper end to increase rigidity.

  The lateral width of the fixture 13 cannot be made so small in order to secure its rigidity and facilitate the handling of the presser plate 132. In the small burner 4, the inner diameter of the burner body 7 is equal to or less than the lateral width of the upper end portion of the fixture 13. As a result, the arrangement height of the fixture 13 is limited by the height of the lower surface 71 b of the circumferential side portions 71 a of the rising portion 71 of the burner body 7. When the arrangement height of the fixture 13 is lowered, it becomes difficult to reduce the thickness of the stove, and the length of the support pipe 51 is increased, resulting in an increase in cost.

  In this case, it is also conceivable to avoid the interference of the fixture 13 by making the slope of the front rise of the lower surface 71b of the circumferential side portions 71a of the rising portion 71 of the burner body 7 abrupt. However, in this case, the flow of the air-fuel mixture in the air-fuel mixture passage 72 of the burner body 7 becomes too upward, and even if the spacer 9 is provided, the distribution of the air-fuel mixture deteriorates.

  On the other hand, in the present embodiment, as described above, the inner peripheral center 7a of the burner body 7 is eccentric forward with respect to the outer peripheral center 7b. Therefore, the height of the lower surface 71b at the position in the front-rear direction that coincides with the inner peripheral center 7a can be obtained without making the forward rising inclination of the lower surface 71b of the both side portions 71a in the circumferential direction of the rising portion 71 of the burner body 7 so steep. High enough. Accordingly, even if the inner diameter of the burner body 7 is equal to or less than the lateral width of the fixture 13, the fixture 13 overlaps with the rising portion 71 without causing interference with the circumferential side portions 71 a of the rising portion 71. It can be arranged at as high a position as possible. As a result, the stove can be thinned, and the length of the support pipe 51 can be shortened to reduce the cost.

  As mentioned above, although embodiment which applied this invention to the small burner 4 of a three-piece stove was described, it is the same also for the burner whose inner diameter of a burner body is equal to or less than the width of the fixture for support pipes of a pan bottom temperature sensor The present invention can be applied to. Moreover, in the said embodiment, although the thermocouple 11 is arrange | positioned in addition to the ignition plug 10 in the hollow part 93a provided in the front side of the upper cylinder part 93 of the spacer 9, the thermocouple 11 may be abbreviate | omitted.

Sectional drawing of the principal part of a stove provided with the burner for stove of embodiment of this invention. The top view of the burner for stove of embodiment. The top view of the state which removed the burner cap of the stove burner of embodiment. The cutting | disconnection top view of the burner for stove of embodiment cut | disconnected by the IV-IV line of FIG. FIG. 5 is a cross-sectional view taken along line VV in FIG.

Explanation of symbols

  4 ... Stove burner, 5 ... Pan bottom temperature sensor, 51 ... Support pipe, 6 ... Mixing pipe, 7 ... Burner body, 7a ... Inner center of burner body, 7b ... Outer center of burner body, 71 ... Rising part, 71a ... both sides in the circumferential direction of the rising part, 71b ... the lower surface of both sides in the circumferential direction, 72 ... the mixture passage, 8 ... spacer, 81 ... the seating part, 82 ... the lower cylinder part, 83 ... the upper cylinder part, 83a ... the depression part, DESCRIPTION OF SYMBOLS 9 ... Burner cap, 91 ... Annular wall, 92 ... Flame hole, 93 ... Seal pipe | tube, 10 ... Spark plug, 13 ... Fixing tool.

Claims (2)

Sensor comprising: a mixing tube; an annular burner body having a rising portion rising from a downstream end of the mixing tube; an annular burner cap placed on the burner body; and a pan bottom temperature sensor protruding above the burner cap In a stove burner with the lower surface of the both sides in the circumferential direction of the rising part of the burner body inclined forward as the forward direction from the upstream end to the downstream end of the mixing tube,
The center of the circle that is the contour of the inner peripheral surface of the burner body is the inner peripheral center, the center of the circle that is the contour of the outer peripheral surface of the burner body is the outer peripheral center, and the inner peripheral center is decentered forward with respect to the outer peripheral center. In the rear part of the burner body located behind the center, an air-fuel mixture passage is formed that guides the air-fuel mixture from the mixing pipe upward through the rising part,
A spacer is interposed between the burner body and the burner cap, and the spacer includes a seat portion that is seated on the outer peripheral portion of the upper surface of the burner body, and a lower cylinder portion that extends downward from the seat portion and fits to the outer peripheral surface of the burner body. And an upper tube portion concentric with the inner peripheral center of the burner body extending upward from the outer periphery of the seating portion,
An annular wall seated on the upper end of the upper cylinder is suspended from the outer periphery of the lower surface of the burner cap, and a flame hole is formed by a groove formed in the annular wall. The inner periphery of the burner body is formed on the inner periphery of the burner cap. A seal cylinder fitted to the surface is suspended, and the pan bottom temperature sensor protrudes above the burner cap through the inner circumferential space of the seal cylinder.
A burner for a stove with a sensor, wherein a fixture for fixing a support pipe for supporting a pan bottom temperature sensor concentrically with the inner peripheral center of the burner body is arranged at a height overlapping with a rising portion of the burner body. .   2. The stove for a sensor with a sensor according to claim 1, wherein a hollow portion recessed radially inward is formed in a front portion of the upper cylinder portion of the spacer, and a spark plug is disposed in the hollow portion. Burner.

Images