JP2006078103A - Gas cooking device with pot bottom temperature sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas cooking device with a pot bottom temperature sensor having superior heat resistance and high detection accuracy by providing an optimum heat shielding composition of the pot bottom temperature sensor while suppressing a temperature rise of an outer circumferential face of a heat shielding tube protecting the pot bottom temperature sensor. <P>SOLUTION: The heat shielding tube 11 is provided on a periphery of the pot bottom temperature sensor 14 for protection from combustion heat of a burner 1. In the heat shielding tube 11, multiple forced draft passages 12a and 12b are formed to turn back air supplied from a blower 10 at an upper part and guide it downward. A natural draft passage 12c is formed between the heat shielding tube 11 and the pot bottom temperature sensor 14. The forced draft passage 12a is communicated with the natural draft passage 12c by a plurality of openings opened on a circumference of a midway part. The pot bottom temperature sensor 14 is cooled by branching off one part of the air supplied from the blower 10 and evenly sending it to the periphery of the pot bottom temperature sensor 14. The heat shielding tube 11 is cooled by blowing the remaining air from a blowout opening 13 of a heat shielding tube 11 lower end and sending it along the heat shielding tube 11 outer circumferential face. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a gas cooker including a gas burner and a pan bottom temperature sensor for measuring the pan bottom temperature by contacting the bottom surface of a cooking vessel heated by the gas burner.

Conventionally, as shown in FIG. 5, this type of gas cooker is a gas stove including a burner 1 and a pan bottom temperature sensor 14 in contact with the bottom surface of a cooking vessel 6 heated by the burner, and surrounds the pan bottom temperature sensor 14. A heat shield cylinder 11 is provided, and a supply cylinder 16 for supplying air from the blower 10 is inserted into the heat shield cylinder 11, and an upper end of the heat shield cylinder 11 is inserted into a gap between the heat shield cylinder 11 and the supply cylinder 16. In the case where air is forced to flow from the portion to the outlet 17 at the lower end of the heat shield cylinder, an air guide path 18 communicating with the outlet 17 at the lower end of the heat shield cylinder is provided, and an air outlet from the air guide path 18 is provided. It arrange | positions just under the flame outlet 3 of a burner (for example, refer patent document 1).
JP 2004-60976 A

  However, the conventional gas cooker cools the pan bottom temperature sensor 14 by directly flowing the air supplied from the blower 10 around the pan bottom temperature sensor 14, and the air flow is formed by the heat shield cylinder 11 and the supply cylinder 16. A large amount of secondary air that has been heated by blowing out to the vicinity of the flame outlet 3 of the burner 1 is supplied through the air gap 18 through the air gap, and the heat to the heat shield cylinder 11 is reduced by shortening the flame. It is intended to reduce the impact on the environment. Although the direct influence of the flame can be avoided by shortening the flame, there is a concern about the influence of the radiant heat due to the increase in the flame temperature accompanying the shortening of the flame. However, the heat resistance temperature of the enamel processing applied to the surface for corrosion prevention is exceeded, and the enamel is melted or peeled off when used for a long time, and the outer peripheral surface of the heat shield cylinder 11 is abnormal. In order to avoid this problem, the air supplied from the blower 10 is directly cooled around the pan bottom temperature sensor 14 to cool the pan bottom temperature sensor 14. However, this configuration of flowing a large amount of cooling air has a problem that the detection accuracy of the pan bottom temperature sensor 14 is lowered.

  The present invention solves the above-mentioned problem, while suppressing an increase in the temperature of the outer peripheral surface of the heat shield cylinder that protects the pan bottom temperature sensor, and providing an optimum heat shield configuration of the pan bottom temperature sensor, has excellent heat resistance. It aims at providing the gas cooker with a pan bottom temperature sensor with high detection accuracy.

  In order to achieve the above object, the gas cooker with a pan bottom temperature sensor according to the present invention is provided with a heat shield cylinder that protects from the combustion heat of the burner around the pan bottom temperature sensor, and the heat shield cylinder is provided with air supplied from a blower. A plurality of forced air passages that are folded upward and led downward are formed, and a natural air passage that allows air to flow by a draft effect is formed between the heat shield cylinder and the pan bottom temperature sensor, and the forced air passage and the natural air passage are While communicating with the opening provided in the middle of the forced ventilation path, the opening is provided at a plurality of locations on the circumference of the forced ventilation path, and a part of the air supplied from the blower is branched so that the bottom temperature sensor The pan bottom temperature sensor is cooled by flowing uniformly to the surroundings, and the remaining air is blown out from the blowout port at the lower end of the heat shield tube, and the heat shield tube is cooled by flowing along the outer peripheral surface of the heat shield tube. Was configured to Than it is.

  According to the above invention, the natural ventilation path formed between the pan bottom temperature sensor and the heat shield cylinder, and the multiple forced ventilation paths formed in the heat shield cylinder, the heat shield from the combustion heat through the plurality of cooling layers. As a result, a reliable heat insulation effect is obtained, and an opening that allows air to flow evenly around the pan bottom temperature sensor is provided on the circumference of the forced ventilation path, and an appropriate amount of air is supplied through the natural ventilation path. Therefore, the pan bottom temperature sensor can also be cooled to the extent that it does not affect the detection accuracy, and further, the rise of the surface temperature can be suppressed by flowing cooling air along the outer peripheral surface of the heat shield cylinder. The heat insulation cylinder can be made to have a longer life because it can be below the heat resistance temperature of enamel processing on the outer surface of the heat cylinder, and a more reliable heat insulation effect can be achieved by suppressing the temperature rise on the outer surface of the heat insulation cylinder. Can be obtained.

  According to the present invention, it is possible to ensure the optimum heat shielding configuration and cooling configuration of the pan bottom temperature sensor while suppressing the temperature rise of the outer peripheral surface of the heat shield cylinder protecting the pan bottom temperature sensor, and detection with excellent heat resistance. A gas cooker with a highly accurate pan bottom temperature sensor can be provided.

  1st invention is arrange | positioned in the circumference | surroundings of the pan bottom temperature sensor which measures the pan bottom temperature provided in the approximate center part of the said burner, and has measured the pan bottom temperature of the cooking container, and the burner which has the flame outlet toward the center And a heat shield cylinder that shields the heat of combustion from the burner and a blower that supplies air into the heat shield cylinder, and the heat shield pipe folds the air supplied from the blower upward and guides it downward. A multiple forced ventilation path is formed, and a natural ventilation path is formed between the heat shield cylinder and the pan bottom temperature sensor to flow air by a draft action, and the forced ventilation path and the natural ventilation path are in the middle of the forced ventilation path. While communicating with the provided opening, the opening is provided at a plurality of locations on the circumference of the forced air passage, and a part of the air supplied from the blower is branched to flow uniformly around the pan bottom temperature sensor. Cooling the pan bottom temperature sensor; One, is characterized in that it has a structure for cooling the heat shield tube by passing along the heat pipe outer peripheral surface blowout said shield the rest of the air from the outlet of the heat shield tube lower end.

  According to the present invention, the natural air passage formed between the pan bottom temperature sensor and the heat shield tube and the multiple forced air passages formed in the heat shield tube are shielded from the combustion heat through the plurality of cooling layers. As a result, a reliable heat insulation effect is obtained, and an opening that allows air to flow evenly around the pan bottom temperature sensor is provided on the circumference of the forced ventilation path, and an appropriate amount of air is supplied through the natural ventilation path. Therefore, the pan bottom temperature sensor can also be cooled to the extent that it does not affect the detection accuracy, and further, the rise of the surface temperature can be suppressed by flowing cooling air along the outer peripheral surface of the heat shield cylinder. The heat insulation cylinder can be made to have a longer life because it can be below the heat resistance temperature of enamel processing on the outer surface of the heat cylinder, and a more reliable heat insulation effect can be achieved by suppressing the temperature rise on the outer surface of the heat insulation cylinder. Can be obtained.

  The second invention is characterized in that, in the first invention, a guide body is provided which covers an opening provided in the middle of the forced air passage and has an open portion below.

  According to the present invention, even when boiled juice overflowing from the container during cooking enters the natural ventilation path provided between the pan bottom temperature sensor and the heat shield cylinder, the guide body opens the forced ventilation path to the opening provided in the forced ventilation path. Inflow can be prevented, and the situation where the forced ventilation path is blocked by the broth can be avoided, and the cooling effect of the pan bottom temperature sensor can be reliably maintained.

  A third invention is characterized in that, in the first invention, a guide plate having a downward inclined surface projecting toward the natural ventilation path is provided at an upper end portion of an opening provided in the middle of the forced ventilation path. .

  According to the present invention, even when boiled juice or the like overflowing from the container during cooking enters the natural ventilation path provided between the pan bottom temperature sensor and the heat shield cylinder, the guide plate opens the forced ventilation path to the opening provided in the forced ventilation path. Inflow can be prevented, and the situation where the forced ventilation path is blocked by the broth can be avoided, and the cooling effect of the pan bottom temperature sensor can be reliably maintained.

  A fourth invention is characterized in that, in any one of the first to third inventions, the blow-out port provided at the lower end of the heat shield cylinder is positioned below the flame port of the burner.

  According to the present invention, the cooling air flowing through the forced ventilation path is blown out from the lower end of the heat shield cylinder below the flame opening, and then flows upward along the outer peripheral surface of the heat shield cylinder, so that the heat shield is affected by the radiant heat of the flame. The entire outer peripheral surface of the cylinder is covered with an air curtain, and a temperature rise due to radiant heat can be suppressed, and the life of the heat shield cylinder can be extended and a more reliable heat shield effect can be obtained.

  A fifth invention is characterized in that, in any one of the first to fourth inventions, the amount of air supplied from the blower is changed according to the thermal power.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to supply optimal air quantity according to the thermal power of a burner, and can provide the thermal-insulation structure with the balance of the cooling effect and detection accuracy.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiment.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a gas cooker according to the first embodiment of the present invention.

  In the figure, the burner 1 is placed on a mounting plate 2, and a large number of slit-shaped flame ports 3 are arranged inside the substantially donut-shaped burner 1. On the other hand, a flame 4 is formed on the flame outlet 3. A spilled cover 5 is installed at the upper part of the burner 1, and a gotok 7 for placing the cooking container 6 is arranged at the upper part thereof. The gotok 7 is disposed in the approximate center of the opening provided in the top plate 8.

  In addition, a juice tray 9 for receiving the spilled liquid from the cooking container 6 is placed at the lower center of the burner 1, and the cooking container placed on the gotok 7 at the approximate center of the juice tray 9. A pan bottom temperature sensor 14 for measuring the pan bottom temperature 6 is installed, and a heat shield cylinder 11 for suppressing the influence of radiant heat from the flame 4 is provided around it. The heat shield cylinder 11 has an air passage inside thereof, and the cooling air supplied from the blower 10 is allowed to flow to form a heat shield space for cooling the heat shield cylinder 11 and radiant heat from the flame 4. I have to.

  More specifically, multiple forced air passages 12 a and 12 b are provided for guiding the air supplied from the blower 10 into the heat shield cylinder 11, and the air sent from the blower 10 is contained in the heat shield cylinder 11. It is blown out from the blowout port 13 at the lower end of the heat shield cylinder 11 through the forced ventilation path 12 b formed downward and passing through the forced ventilation path 12 b formed downward.

  Further, a natural ventilation path 12c in which an air flow is formed by a natural draft is provided between the pan bottom temperature sensor 14 and the heat shield cylinder 11, and the heat shield effect is further enhanced by forming a predetermined air layer. It is.

  Furthermore, an opening 15 for branching a part of the air supplied from the blower 10 and flowing it to the natural ventilation path 12c is provided in the middle of the forced ventilation path 12a formed inside the heat shield cylinder 11. . As shown in FIG. 2, the openings 15 are provided at a plurality of locations on the circumference of the forced air passage 12 a substantially evenly so that air from the blower 10 flows uniformly to the pan bottom temperature sensor 14. . Thereby, the temperature rise of the pan bottom temperature sensor 14 due to the radiant heat of the flame 4 can be prevented, and the cooling effect of adjusting the degree of cooling of the pan bottom temperature sensor 14 by adjusting the opening area of the opening 15 does not affect the detection accuracy. Can be secured.

  In addition, a guide body 16 having an open portion below the natural air passage 12c that covers the opening 15 is provided on the front surface of the opening 15 so that the broth that overflows from the container 6 during cooking is provided. Even when it enters the natural ventilation path 12c provided between the pan bottom temperature sensor 14 and the heat shield cylinder 11, the guide body 16 prevents the flow into the opening 15 provided in the forced ventilation path 12c, and forced ventilation with boiled juice or the like. The situation where the path 12c is blocked can be avoided, and the cooling effect of the pan bottom temperature sensor 14 can be reliably maintained. As shown in FIG. 3, the guide body 16 may be formed integrally with the forced ventilation path 12a as a guide plate 17 that projects toward the natural ventilation path 12c at the upper end of the opening 15 and has a downwardly inclined surface. It has the following effects.

  As described above, the forced air passages 12a and 12b formed in the heat shield cylinder 11 are folded upward to form a plurality of air passages, and by supplying cooling air supplied from the blower 10, By forming a cooling layer and providing a natural ventilation path 12c between the pan bottom temperature sensor 14 and the heat shield cylinder 11 and interposing a predetermined air layer, heat insulation of combustion heat from the burner 1 by a plurality of cooling layers. The configuration is established, and furthermore, by providing a plurality of openings 15 on the circumference in communication with the natural ventilation path 12c in the middle of the forced ventilation bath 12a, the thermal influence on the pan bottom temperature sensor 14 is reduced. .

  Next, the operation and effect of the gas cooker configured as described above will be described.

  When combustion is started in the burner 1, the blower 10 is activated, and the air sent from the blower 10 passes through the forced ventilation paths 12 a and 12 b formed in the heat shield cylinder 11, and is formed in the lower part of the heat shield cylinder 11. It blows out from the outlet 13. The blown air is influenced by the inward flame 4 formed in the flame port 3 and flows upward along the outer peripheral surface of the heat shield cylinder 11, and an air curtain is interposed between the heat shield cylinder 11 and the flame 4. Form. This air curtain can reduce the influence of the radiant heat from the flame 4, suppress the temperature rise of the heat shield cylinder 11, and perform enamel processing on the surface of the heat shield cylinder 11 with the temperature of the outer peripheral surface of the heat shield cylinder 11. The heat resistance temperature can be lowered.

  Thereby, even if it uses for a long period of time, it will not corrode. Moreover, the air blown out from the lower part of the heat shield cylinder 11 is also used as secondary air for combustion of the burner, a better combustion state is created, and high-load combustion can be realized.

  Moreover, by suppressing the temperature rise of the heat shield cylinder 11, the thermal influence on the pan bottom temperature sensor 14 is reduced. In addition, the multiple forced air passages 12a and 12b formed in the heat shield cylinder 11 and the pot bottom With the heat shield structure formed by the natural ventilation path 12c formed between the temperature sensor 14 and the heat shield cylinder 11, it is possible to detect the temperature of the pan bottom with high accuracy without being affected by the combustion heat.

  Furthermore, the effect as shown in FIG. 4 is exhibited by providing a plurality of openings 15 on the circumference in communication with the natural ventilation path 12c in the middle of the forced ventilation bath 12a.

  FIG. 4 shows a case where there is no air to blow off by closing the gap (natural air passage) 12c between the pan bottom temperature sensor 14 and the heat shield cylinder 11, and a case where a part of the air supplied from the blower 10 is flowed as in this embodiment. The temperature in the vicinity of the pan bottom temperature sensor 14 is shown.

  As can be seen from FIG. 4, when the gap (natural ventilation path) 12c between the pan bottom temperature sensor 14 and the heat shield cylinder 11 is closed and there is no air to blow out, the temperature in the vicinity of the pan bottom temperature sensor 14 rises to nearly 500 ° C. When performing automatic cooking of tempura, the control temperature of the pan bottom temperature sensor 14 is around 160 to 200 ° C. When the temperature near the pan bottom temperature sensor 14 rises to near 500 ° C., the control temperature becomes high due to the radiant heat, and the cooking container 6 has a very large variation in oil temperature control (160 to 180 ° C.). However, when there is air blown out from the gap (natural air passage) between the pan bottom temperature sensor 14 and the heat shield cylinder 11 as in the present embodiment, the temperature near the pan bottom temperature sensor 14 is 250 ° C. as can be seen from FIG. As a result, the influence of radiant heat is reduced and good oil temperature control becomes possible.

  In addition, as shown in FIG. 1, the air curtain is provided between the outer peripheral surface of the heat shield tube 11 and the flame 4 by installing the blowout port 13 at the lower end of the heat shield tube 11 below the flame port 3 of the burner 1. It can form, and the temperature rise of the heat insulation cylinder 11 can be prevented. Moreover, the air blown out from the blow-out port 13 contributes as the secondary air for combustion of the burner 1 and can create a good combustion state.

  If the blowout port 13 at the lower end of the heat shield tube 11 is installed above the flame port 3 of the burner 1, an air curtain cannot be formed between the heat shield tube 11 and the flame 4. The outer peripheral surface directly receives the radiant heat of the flame 4, and the temperature rise of the heat shield cylinder 11 cannot be prevented. Further, the air blown out from the blow-out port 13 is not used as the secondary air for combustion of the burner 1, and a good combustion state cannot be created.

(Embodiment 2)
In the second embodiment, the amount of air supplied from the blower 10 is changed according to the heating power of the burner 1.

  Table 1 shows the relationship between the amount of combustion of the burner 1 and the amount of air supplied from the blower 10. As can be seen from Table 1, when the combustion amount is large, the amount of air supplied from the blower 10 is increased. When the combustion amount is low, the amount of air supplied from the blower 10 is decreased.

When the amount of combustion is large, the flame 4 formed in the flame outlet 3 of the burner 1 becomes longer, gets closer to the heat shield cylinder 11, and the surface temperature of the heat shield cylinder 11 rises. Moreover, the radiant heat to the pot bottom temperature sensor 14 increases, the temperature in the vicinity of the pot bottom temperature sensor 14 increases, and the control of the pot bottom temperature sensor 14 is affected. Accordingly, when the combustion amount is large, more cooling air of the pan bottom temperature sensor 14 is required. Further, when the amount of combustion is large, a large amount of secondary air for combustion is required.
On the other hand, when the amount of combustion is small, if the same amount of cooling air is sent as when the amount of combustion is large, the temperature in the vicinity of the pan bottom temperature sensor 14 is excessively cooled, which adversely affects the temperature control of the pan bottom temperature sensor 14. Moreover, the pan bottom of the cooking container 6 will be cooled excessively, and thermal efficiency will also fall. Furthermore, when the amount of combustion is small, the flame length is also short. If an excessive amount of secondary air for combustion is sent, the flame blows off, and no flame is formed on the flame outlet 3 of the burner 1 and the fire is extinguished. .

  Therefore, when the amount of combustion is large, the amount of air supplied from the blower 10 is increased, and when the amount of combustion is small, the amount of air supplied from the blower 10 is decreased to keep the temperature near the pan bottom temperature sensor 14 constant. And good temperature control is possible. Further, it is possible to prevent a decrease in thermal efficiency when the amount of combustion is small, and it is possible to prevent the flame from blowing off.

Sectional drawing of the gas cooker in Embodiment 1 of this invention Cross-sectional view of the heat shield cylinder in the gas cooker Sectional drawing which shows the guide plate structure in the gas cooker The figure which shows the temperature rise of the pan bottom temperature sensor vicinity in the gas cooker Cross section of conventional gas cooker

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Burner 3 Flame outlet 4 Flame 6 Cooking container 10 Blower 11 Heat shield cylinder 12a, 12b Forced ventilation path 12c Natural ventilation path 14 Pan bottom temperature sensor 15 Opening

Claims (5)

A burner having a flame outlet directed in the center direction; a pan bottom temperature sensor for measuring the pan bottom temperature of a cooking vessel provided at a substantially central portion of the burner; and a combustion from the burner disposed around the pan bottom temperature sensor A heat shield cylinder for insulating heat, and a blower for supplying air into the heat shield cylinder,
The heat shield tube forms a multiple forced air passage that folds the air supplied from the blower upward and guides the air downward, and a natural air flow passage that allows air to flow by draft action between the heat shield tube and the pan bottom temperature sensor. Forming,
The forced ventilation path and the natural ventilation path communicate with each other through an opening provided in the middle of the forced ventilation path, and a plurality of openings are provided on the circumference of the forced ventilation path, and a part of the air supplied from the blower To cool the pan bottom temperature sensor by flowing uniformly around the pan bottom temperature sensor, and blow out the remaining air from the blowout port at the lower end of the heat shield tube along the outer peripheral surface of the heat shield tube A gas cooker equipped with a pan bottom temperature sensor, wherein the heat shield tube is cooled by flowing it. The gas cooker with a pan bottom temperature sensor according to claim 1, wherein a guide body is provided which covers an opening provided in the middle of the forced air passage and has an open portion below. The gas cooker with a pan bottom temperature sensor according to claim 1, wherein a guide plate having a downward inclined surface projecting toward the natural ventilation path is provided at an upper end of an opening provided in the middle of the forced ventilation path. The gas cooker with a pan bottom temperature sensor according to any one of claims 1 to 3, wherein the outlet provided at the lower end of the heat shield cylinder is positioned below the flame outlet of the burner. The gas cooker with a pan bottom temperature sensor according to any one of claims 1 to 4, wherein the amount of air supplied from the blower is changed according to the thermal power.

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