JP2019143843A - Gas injection nozzle device of bunzen type gas burner - Google Patents

Abstract

To provide a gas injection nozzle for a gas cooking stove capable of increasing a primary suction rate when the flow rate of a gas is low.SOLUTION: A gas injection nozzle device comprises: (a) a gas injection nozzle provided with a fuel gas nozzle having a nozzle hole, a gas feed path and a cylindrical body for first step primary air suction having a suction hole sucking first step primary air; and (b) a mixing part sucking second step primary air by ejector effect by the injection of a first gaseous mixture obtained by mixing fuel gas and the first step primary air and also mixing the second step primary air and the first gaseous mixture to form a second gaseous mixture fed to combustion at a flame formation part in a bunzen type gas burner, in which the nozzle hole 32a is formed in such a manner that its central line C1 is superimposed with the shaft center X of the cylindrical body 50 for first step primary air suction, also the outer surface around the part disposed with the suction port in the cylindrical body for first step primary air suction is made flat, and the central line C2 of the suction hole is not crossed with the shaft center X of the cylindrical body for first step primary air suction.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a gas injection nozzle device, and more particularly to a gas injection nozzle device used for a Bunsen type gas burner.

  Various gas injection nozzles having a structure that contributes to the primary air rate in the air-fuel mixture sucked by the burner have been developed as gas injection nozzles used in gas burner burners.

  In Patent Document 1, the fuel gas is ejected from the ejection hole provided in the gas burner and provided in the inner space of the cylinder, and from the suction hole provided on the outer periphery of the cylinder as the fuel gas is ejected. The primary air sucked into the inner space of the cylinder is merged with the fuel gas, and the primary air rate is improved by using a gas nozzle configured to be ejected from the opening provided at the tip of the cylinder toward the gas burner. A gas injection nozzle is described.

  When the gas injection nozzle of Patent Document 1 is used, it becomes possible to increase the primary air suction ratio (hereinafter referred to as the primary suction rate) when the gas flow rate is small, and suddenly due to the instrument plug operation or the like. Even if the amount of gas decreases, an extreme decrease in primary suction can be suppressed, which is significant.

Japanese Patent Laid-Open No. 11-182819

  However, in recent years, in gas stoves, it has been desired to increase the maximum thermal power and reduce the minimum thermal power, and it is desirable to further increase the primary suction rate when the gas flow rate is small. The reality is that it is rare.

  An object of the present invention is to solve the above-described problems and to provide a gas injection nozzle device for a Bunsen type gas burner capable of increasing the primary suction rate when the gas flow rate is small.

In order to achieve the above object, a gas injection nozzle device for a bunsen type gas burner according to the present invention includes:
(A) a Bunsen type gas burner by a fuel gas nozzle having a nozzle hole for injecting fuel gas, a gas supply path for supplying fuel gas to the nozzle hole, and an ejector effect by injecting the fuel gas from the nozzle hole A gas injection nozzle comprising a first-stage primary air suction cylinder having a suction hole for sucking first-stage primary air as combustion air of
(B) A first air-fuel mixture obtained by mixing the fuel gas injected from the nozzle hole and the first-stage primary air in the first-stage primary air suction cylinder is the first-stage primary air suction. The second stage primary air as the combustion air of the Bunsen gas burner is sucked and mixed with the second stage primary air and the first air-fuel mixture by the ejector effect caused by being injected from the tip of the cylinder And a gas injection nozzle device used in a Bunsen type gas burner comprising: a mixing unit that forms a second air-fuel mixture used for combustion in a flame forming unit of the Bunsen type gas burner,
The nozzle hole of the fuel gas nozzle is formed as a small diameter portion having a smaller inner diameter than the other part of the fuel gas nozzle so that a center line overlaps with the axis of the first stage primary air suction cylinder, And,
The first stage primary air suction cylinder is configured such that the outer surface around the portion where the suction hole is disposed is a flat surface, and passes through the center of the suction hole. A center line of the suction hole orthogonal to the certain plane is configured not to intersect the axis of the first stage primary air suction cylinder.

Moreover, the gas injection nozzle device of the Bunsen type gas burner of the present invention is
The first-stage primary air suction cylinder is configured as a polygonal cylinder having a plurality of the flat surfaces each provided with the suction holes as an outer surface where the suction holes are provided. And
By sucking air sucked from each of the plurality of suction holes, a first air-fuel mixture, which is a mixture of the fuel gas and the primary air, in the first-stage primary air suction cylinder is converted into the first-stage primary. It is preferable that the air suction cylinder is configured to flow in a uniform direction so that it can be swung in a predetermined direction as viewed in the axial direction.

  Further, it is preferable that the plurality of suction holes are distributed at different positions in the direction along the flow direction of the fuel gas in the first stage primary air suction cylinder.

  The gas injection nozzle device of the Bunsen type gas burner of the present invention is configured as described above, (a) a fuel gas nozzle having a nozzle hole for injecting fuel gas, and a gas supply path for supplying fuel gas to the nozzle hole. A first-stage primary air suction cylinder having a suction hole for sucking first-stage primary air as combustion air of the Bunsen gas burner by an ejector effect caused by the fuel gas being injected from the nozzle hole. The first air-fuel mixture obtained by mixing the gas injection nozzle, (b) the fuel gas injected from the nozzle hole, and the first-stage primary air in the first-stage primary air suction cylinder is the first-stage primary air. Due to the ejector effect of being ejected from the tip of the suction cylinder, the second stage primary air as the combustion air of the Bunsen gas burner is sucked and the second stage one A mixing portion that mixes air and the first air-fuel mixture to form a second air-fuel mixture for combustion in the flame forming portion of the Bunsen gas burner, and the nozzle hole of the fuel gas nozzle The small-diameter portion having a smaller inner diameter than the portion is formed to be concentric with the axis of the first stage primary air suction cylinder, and the suction hole of the first stage primary air suction cylinder is arranged. The outer surface around the installed location is configured to be a flat surface, and the center line of the suction hole that passes through the center of the suction hole and is orthogonal to the plane that is the outer surface is used for the first stage primary air suction. Since it is configured so as not to intersect the axial center of the cylindrical body, the first air-fuel mixture can be a swirling flow that swirls around the axial center of the first stage primary air suction cylindrical body. Primary suction rate can be increased when the flow rate is small Becomes, the Bunsen type gas burner, it is possible to stably burn even a small thermal power.

  In addition, the first stage primary air suction cylinder is configured as a polygonal cylinder having a plurality of planes each having a suction hole as an outer surface where the suction hole is provided, and The first-stage primary air suction cylinder is converted into the first-stage air mixture, which is a mixture of the fuel gas and the primary air in the first-stage primary air suction cylinder by suction of air sucked from each of the plurality of suction holes. The first air-fuel mixture swirls around the nozzle hole forming center line when configured to flow with the direction of the moment being aligned so that it can be swung in a predetermined direction when viewed from the axial direction of the body The swirl flow can be further increased, and the primary suction rate when the gas flow rate is small can be further increased.

  Further, when the plurality of suction holes are distributed at different positions in the direction along the flow direction of the fuel gas in the first stage primary air suction cylinder, the first air-fuel mixture is used for forming the nozzle holes. A swirling flow swirling around the center line can be efficiently formed, and the primary suction rate when the gas flow rate is small can be further increased, which further enhances the present invention. it can.

It is a perspective view of a gas stove provided with the gas injection nozzle device of the Bunsen type gas burner concerning one embodiment of the present invention. It is a front view which shows the cooking setting part of the gas stove shown in FIG. It is a figure explaining the gas supply to the stove burner and grill burner of the gas stove shown in FIG. It is a schematic sectional drawing which shows the gas valve block of the gas stove shown in FIG. It is sectional drawing which shows the structure of the gas injection nozzle apparatus of the bunsen type gas burner of the gas stove shown in FIG. It is principal part sectional drawing which shows the gas injection nozzle concerning one Embodiment of this invention. It is principal part sectional drawing seen from the center axis direction of the nozzle which shows the gas injection nozzle concerning one Embodiment of this invention (center axis direction view). It is principal part sectional drawing seen from the center axis direction of the nozzle which shows the gas injection nozzle concerning another embodiment of this invention (center axis direction view).

  Hereinafter, the embodiment of the present invention will be shown and the features thereof will be described in more detail.

[Embodiment 1]
FIG. 1 is a perspective view showing a configuration of a gas stove 1 provided with a gas injection nozzle device A (see FIG. 5) of a Bunsen type gas burner according to an embodiment of the present invention. In addition, the gas stove concerning this Embodiment 1 is a built-in type gas stove provided with the stove part and the grill.

<Basic configuration of gas stove>
As shown in FIG. 1, the gas stove 1 is provided with a plurality of heating units 2 on a top plate 11 constituting the top surface portion thereof.

  In the gas stove 1 according to the first embodiment, as shown in FIG. 1, a stove part 2 a provided with a high thermal power Bunsen gas burner (a stove burner) 31 as a heating part 2 is provided on the left side and the right side. On the upper surface of the top plate 11, the five virtues 21 are provided centering on each of the burners 31. The stove section 2a is configured.

  The ignition device 23 includes one input circuit (including the primary winding of the high voltage transformer) and one output circuit (secondary winding of the high voltage transformer) for each burner. By energizing the input circuit, a high voltage is generated in each output circuit (secondary winding of the high-voltage transformer), and a high voltage for ignition discharge is supplied to all the burners.

  As shown in FIG. 5, each stove section 2 a is provided with a container detection means 25 for detecting a cooking container placed on the virtues 21 and a temperature sensor 26 for detecting the temperature of the lower surface of the cooking container. Yes.

  The container detection means 25 is comprised by the support part 25a fixed to the gas stove 1, the movable part 25b supported by the support part 25a so that a vertical movement is possible, and the detection switch 25c which detects the vertical position of the movable part 25b. Has been.

  The movable portion 25b is biased upward by a biasing means (not shown) such as a spring, and its upper end portion is configured to protrude upward from the five virtues 21. When the cooking container is placed on the virtues 21 in this state, the upper end of the movable part 25b is pushed down to the lower surface of the cooking container, and the downward movement is detected by the detection switch 25c as the movable part 25b is moved downward. Is recognized by a control unit (not shown). And the temperature sensor 26 is provided in the upper end part of the movable part 25b, and when the cooking container is mounted on Gotoku 21, the temperature sensor 26 contacts the lower surface of the cooking container and detects the temperature. The set temperature is recognized by the control unit.

  Moreover, the gas stove 1 is provided with a grill 2b as a heating unit 2 as shown in FIG. The grill 2b includes a grill box formed in the center of the main body of the gas stove 1, a grill burner (not shown) as heating means provided in the grill box, an ignition device 23, and an ignition detection device 24. The front end of the grill 2b is open to the front surface portion 12 of the gas stove 1, and is configured to be opened and closed by the grill door 28.

  The ignition detection device 24 is composed of a thermocouple provided in the stove burner 31 and the grill burner, and when ignited, the thermoelectromotive force generated by the heat of the flame is recognized by the control unit.

  As shown in FIG. 1, front panel P1 and P2 which comprise the front part 12 of the gas stove 1 with the grill door 28 are provided on both sides of the grill door 28, and on the upper side of the left front panel P1, the left side A point fire extinguishing button 14a for igniting / extinguishing the stove burner 31 is provided. Further, a fire extinguishing button 14b for igniting / extinguishing the grill burner and a fire extinguishing button 14c for igniting / extinguishing the right burner 31 are provided from the upper left side of the right front panel P2. These point fire extinguishing buttons 14 (14a to 14c) constitute a heating / stopping manual operation unit for manually starting / stopping heating in the heating unit 2. Further, on the front surface portion 12, a heating power adjustment lever 15 (15a to 15c) serving as a heating amount manual operation unit for manually adjusting the heating amount of each heating unit 2 is provided on each point fire extinguishing button 14a to 14c, respectively. Is provided.

  As shown in FIGS. 3 and 4, the gas valve block 6 includes an internal gas flow path 61, an introduction port 61 a serving as an upstream end of the gas flow channel 61, and a discharge port 61 b serving as a downstream end. And are provided.

  The internal gas flow path 61 is provided with a valve hole for the safety valve 62 and a valve hole for the main valve 63 from the upstream side. On the downstream side of the valve hole for the main valve 63, a large-fire channel 61c and a small-fire channel 61d are provided in parallel, and the large-fire channel 61c is used for switching between large and small thermal powers. A valve hole for the latch type electromagnetic valve LB1 is provided, and a valve hole for the latch type electromagnetic valve LB2 is provided in the small fire channel 61d.

  The large-fire channel 61c and the small-fire channel 61d merge on the downstream side of the valve hole of the latch-type solenoid valve LB1 and the small-fire orifice of2 located on the downstream side of the latch-type solenoid valve LB2. Further, a valve hole for the flow rate control valve 65 interlocked with the heating power adjustment lever 15 is provided on the downstream side.

  Incidentally, when the fire extinguishing button 14 is operated when the cooking container is not detected by the container detection means 25 described above, the latch type electromagnetic valve LB1 and the latch type electromagnetic valve LB2 are closed by the control unit, and heating is performed. Container detection control is performed so as not to start. Thereby, when the cooking container is not mounted on the five virtues 21, it is possible to prevent a flame from being formed on the stove burner 31.

  Further, the gas flow path 61 is provided with a bypass flow path BP that bypasses a portion where the latch type electromagnetic valve LB1 and the latch type electromagnetic valve LB2 are provided, and a bypass orifice of1 is provided in the bypass flow path BP. It has been. The bypass orifice of1 is provided to share a plurality of gas valve blocks 6, and may be opened when the gas valve block 6 is used for application to other models. In FIG. 2, the bypass orifice of1 is closed by a closing body (not shown).

  When the heating power adjustment lever 15 is set to a position between medium and large fires, the heating power of the combustor 31 depends on the combination of opening and closing of the latching solenoid valve LB1 and the latching solenoid valve LB2. Adjustment control is performed by the control unit in a manner as shown in the following table (Table 1).

  The latch-type solenoid valves LB1 and LB2 shift to an open state by energizing a pulse current having a polarity for opening the valve, and then maintain the open state even after the energization is stopped. It shifts to a closed state by energizing a pulse current having a polarity opposite to that of the current), and thereafter, the closed state is maintained even after the energization is stopped. At this time, the pulse width of the current is set to 200 to 300 milliseconds, and power is saved even when the heating power of the stove is maintained in various states. Therefore, it is particularly suitable when a dry battery is used as the power source of the device. Used.

  The downstream side of the valve hole for the flow rate control valve 65 reaches the outlet 61b for supplying gas to the burner 31. A slider 66 is attached to the instrument plug main body 60 so as to be movable in the front-rear direction. The slider 66 is pushed rearward by a child lock slide portion (not shown) incorporated in the point-extinguishing button 14. It is configured to move backward.

  The point-extinguishing button 14 in which the child lock slide portion is incorporated is provided so as to freely move back and forth, and the portion above the portion pressed by the finger of the point-extinguishing button 14 is pivotally supported on the stove body side. The portion pressed by the finger moves back and forth, and presses the front end surface of the slider 66 backward. The slider 66 is provided with a switching mechanism (not shown) for switching between a front position and a rear position, for example, an existing heart-shaped cam, and the slider 66 is moved to the rear position every time the fire extinguishing button 14 is pressed. The front position and the rear position are switched to be held by moving forward from the front position and being positioned at the front position or retreating from the front position and positioned at the rear position.

  Further, a valve rod 67 that moves forward and backward as the slider 66 advances and retracts is provided. The distal end side of the valve rod 67 is inserted into the gas flow path 61, and the distal end portion is inserted through the valve hole for the main valve 63 and the valve hole for the safety valve 62 from the rear side, that is, from the downstream side to the upstream side. Yes.

When the slider 66 switches from the front position to the rear position, the valve rod 67 temporarily moves backward to the rearmost position behind the rear position and then moves forward to the rear position. The valve body for the safety valve 62 is opened by moving the valve body of the safety valve 62 closing the valve hole for the upstream side from the upstream side to the upstream side.
The safety valve 62 is composed of an electromagnetic valve, and the valve body for the safety valve 62 is closed from the rear when the valve body moves forward, that is, downstream. Is released.

  The safety valve 62 is kept open by the control unit only when a flame is detected by the ignition detection device 24, and when the flame is no longer detected, the maintenance of the open state by the control unit is stopped and closed. As a result, the fuel gas can be prevented from flowing out when it disappears due to boiling or wind and the flame of the ignition detection device 24 is no longer detected. Further, when the temperature of the lower surface of the cooking container detected by the temperature sensor 26 reaches a predetermined temperature (for example, 250 ° C.), it is determined that an abnormality such as airing or scorching has occurred, and the safety valve 62 is closed. . In this manner, the safety valve 62, the ignition detection device 24, and the temperature sensor 26 constitute an abnormality detection means.

  A main valve body that opens and closes a valve hole for the main valve 63 is provided in the middle of the valve rod 67. When the slider 66 is positioned at the front position, the main valve element closes the valve hole for the main valve 63 from the rear, and when the slider 66 is positioned at the rear position, the main valve element is for the main valve 63. The valve hole for the main valve 63 is opened behind the valve hole.

  The opening of the valve hole for the flow rate control valve 65 is freely adjusted by the movement of the heating power adjustment needle 65a in the front-rear direction. The opening of the needle 65a is adjusted by operating the thermal power adjustment lever 15, and the supply amount of the fuel gas is increased as the thermal power adjustment lever 15 goes to the right.

  In addition, an appliance plug switch (not shown) that is switched ON / OFF according to the position of the point fire button 14 or the slider 66 is provided. The appliance plug switch is turned OFF when the fire extinguishing button 14 (or the slider 66) is located at the front position, and turned on when it is located at the rear position (including the last position).

In order to light the stove burner 31 and the grill burner, the point fire extinguishing button 14 is pushed and the slider 66 is moved backward from the front position to the rear position. The valve rod 67 retracted together with the slider 66 opens the safety valve 62 and the main valve 63, and the fuel gas is supplied to the stove burner 31 and the grill burner.
Further, when the slider 66 moves backward, the appliance plug switch is turned on, the power supply to the control unit is turned on, and the control unit starts operating.

  When the point-extinguishing button 14 is pushed and heating is started, a desired heating power is obtained by operating the heating power adjustment lever 15. Note that the heating power adjusting lever 15 of the stove section 2a having the left stove burner 31 operates when the operation section of the stove section 2a is operated to ignite the fire power to the medium heating power side in conjunction with the operation of the operation section. It is comprised so that it may move, and it is comprised so that it may become a moderate heating power at the time of ignition.

  When the slider 66 is set to the front position, the main valve 63 is closed and extinguished, the appliance plug switch is turned OFF, the safety valve 62 is closed, and the output of the power holding signal is stopped, and the power supply to the control unit is completed.

  Next, automatic cooking will be described. On the lower side of the front panel on the left side of the gas stove 1, as shown in FIG. A cooking setting unit for grill is provided on the lower right side of the front panel on the right side of the gas stove 1, but details are not described in detail. A battery case 13 (FIG. 1) that houses a battery that serves as a power source for a control unit including a microcomputer is provided on the lower right side of the right front panel of the gas stove 1.

  The stove cooking setting unit 7 sets a cooking time with a set of auto menu setting unit 71 and auto menu display unit 72 for setting an automatic cooking menu (auto menu) for fried food, hot water, and rice cooking. A timer input unit 73 and a timer display 74 are provided.

  As the auto menu setting unit 71, a fried food switch 71a, a hot water switch 71b, and a rice cooking switch 71c are provided. The deep-fried food mode is an automatic cooking mode that automatically adjusts the heating power of the stove burner 31 so that the temperature set by the user is reached after the stove burner 31 is ignited. It is configured so that fried food cooking at a target temperature can be set from a plurality of types of fried food cooking such as ° C., 180 ° C., and 160 ° C., and the setting is displayed on the fried food display portion 72a.

  In addition, the hot water mode and the rice cooking mode are automatic cooking modes in which the burner 31 is burned under preset combustion conditions after the ignition of the burner 31 and the completion of the hot water and cooking is predicted automatically. is there.

  The hot water switch 71b is configured to select and set the mode of hot water such as automatic fire extinguishing, heat keeping for 5 minutes, whether to extinguish immediately after hot water or keep warm for a certain period of time. In addition, the setting is displayed on the hot water display portion 72b. In addition, the rice cooking switch 71c is configured so that a desired rice cooking mode can be set from a plurality of types of rice cooking modes such as rice and rice porridge by pressing it several times. The setting is configured to be displayed.

  The latch type solenoid valve LB1 will be described in detail by taking as an example a case where the deep-fried food mode is selected and the deep-fried food mode is executed by the control unit.

  When the deep-fried food switch 71a is pressed to select the deep-fried food mode and the combustor 31 is ignited, the control unit executes the deep-fried food mode, and the control unit sets the temperature of the cooking container detected by the temperature sensor 26. In order to maintain the set temperature (any one of 200 ° C., 180 ° C., and 160 ° C.), the latch-type electromagnetic valve LB1 is opened and closed, and the heating power of the burner 31 is switched between the large heating power and the small heating power.

  More specifically, when the value of the temperature of the cooking container detected by the temperature sensor 26 is larger than the set temperature, the latch type electromagnetic valve LB1 is closed, and the small fire orifice of2 shown in FIGS. The gas is supplied to the stove burner 31 only from the small fire channel 61d provided with the stove burner 31, the heating power of the stove burner 31 becomes a small heating power, and the temperature at which the temperature of the cooking container detected by the temperature sensor 26 is set is set. When it is smaller, the latch type solenoid valve LB1 is opened, and the combustor is connected to both the small fire channel 61d having the small fire orifice of2 shown in FIGS. 3 and 4 and the latch type solenoid valve LB1. The gas is supplied to 31 and the heating power of the burner 31 becomes a large heating power.

The gas stove 1 has a fuel gas nozzle 32 having a nozzle hole 32a for injecting fuel gas, a gas supply path 35 for supplying the fuel gas to the nozzle hole 32a, and an ejector effect due to the fuel gas being injected from the nozzle hole 32a. A gas injection nozzle 70 having a first-stage primary air suction cylinder 50 having a suction hole 51 for sucking first-stage primary air as combustion air of a stove burner (Bunsen type gas burner) 31 is provided.
That is, fuel gas such as city gas and LP gas is supplied to the fuel gas nozzle 32 from a tubular gas supply path 35 extending from the gas valve block 6 toward the fuel gas nozzle 32. (FIG. 5).

  As shown in FIG. 5, the stove burner (Bunsen gas burner) 31 is a mixing unit that mixes the fuel gas injected from the fuel gas nozzle 32 and the combustion air sucked by the ejector effect caused by the injection of the fuel gas. 40 and a flame forming part 41 for burning the air-fuel mixture mixed in the mixing part 40.

  As described above, on the downstream side of the fuel gas nozzle 32, a cylindrical body having a suction hole for sucking the first-stage primary air as combustion air of the stove burner (Bunsen gas burner) 31. The first stage primary air suction cylinder 50 is provided, and the first stage primary air suction cylinder 50 having the suction holes 51 for sucking the first stage primary air is provided to improve the primary air rate. It is comprised so that it can be made to.

  However, the first-stage primary air suction cylinder 50 provided with the suction holes 51 for sucking the first-stage primary air will be described in detail later.

  The fuel gas nozzle 32 is fixed to the gas supply path 35. Further, the upstream side of the gas supply path 35 is connected to the gas valve block 6 (FIG. 4), and specifically connected to the outlet 61 b of the gas valve block 6. That is, on the upstream side of the gas supply path 35, the gas valve block 6 as a gas amount adjusting unit is disposed.

  As described above, the gas valve block (gas amount adjusting unit) 6 is a passage resistance of the fuel gas passing through the gas flow path 61 inside the gas valve block 6 by opening / closing the latch type electromagnetic valve LB1 or operating the heating power adjusting lever 15. The flow rate of the fuel gas flowing into the gas supply path 35 is adjusted by increasing / decreasing the gas flow rate, and has the following characteristics.

  For example, when the latching solenoid valve LB1 is opened from the small heating power state where the latching solenoid valve LB1 is closed to shift to the large heating power state, the latching solenoid valve LB1 is closed and the gas in the low pressure state is closed. In the supply path 35, the latch type electromagnetic valve LB1 is opened and the high-pressure fuel gas upstream from the latch type electromagnetic valve LB1 flows in rapidly, and the flow rate of the fuel gas increases rapidly.

  Further, when the latching solenoid valve LB1 is closed from the state of the large heating power where the latching solenoid valve LB1 is opened to shift to the state of the small heating power, the flow rate of the fuel gas rapidly decreases.

  That is, with the opening and closing of the latch type electromagnetic valve LB1, the flow rate of the fuel gas is rapidly increased or decreased.

  In general, when the flow rate of fuel gas is large, the amount of combustion air sucked by the ejector effect caused by the fuel gas injected from the fuel gas nozzle is easy to ensure an appropriate amount. When the gas flow rate is small, it becomes difficult to maintain an appropriate amount of combustion air sucked by the above-described ejector effect.

  Therefore, in this embodiment, by providing a characteristic configuration as described below, it is possible to ensure an appropriate amount of combustion air even when the flow rate of the fuel gas is small.

<Characteristic configuration>
A gas injection nozzle device A for a Bunsen gas burner according to an embodiment of the present invention includes (a) a fuel gas nozzle 32 having a nozzle hole 32a for injecting fuel gas, and a gas supply path 35 for supplying the fuel gas to the nozzle hole 32a. A first-stage primary air suction cylinder 50 having a suction hole for sucking first-stage primary air as combustion air of the Bunsen gas burner 31 by an ejector effect caused by injection of fuel gas from the nozzle hole 32a; A first gas mixture in which the fuel gas injected from the nozzle hole 32a and the first stage primary air are mixed in the first stage primary air suction cylinder 50, As the combustion air of the Bunsen type gas burner 31 by the ejector effect that is injected from the tip 50a of the first stage primary air suction cylinder 50 A mixing unit that sucks the second stage primary air and mixes the second stage primary air and the first air-fuel mixture to form a second air-fuel mixture that is used for combustion in the flame forming unit 41 of the Bunsen gas burner 31. 40.

  More specifically, the gas injection nozzle 70 (FIGS. 5, 6, and 7) provided in the gas stove 1 includes a fuel gas nozzle 32 having a nozzle hole 32a for gas injection, and a gas supply path for supplying fuel gas to the nozzle hole 32a. 35 and a first stage primary air suction having a plurality of suction holes 51 for sucking the first stage primary air as combustion air of the Bunsen gas burner by an ejector effect by the fuel gas being injected from the nozzle hole 32a A cylindrical body 50 is provided. Note that a plurality (six in this embodiment) of the plurality of suction holes 51 are arranged at regular intervals in the circumferential direction.

  And the nozzle hole 32a of the fuel gas nozzle 32 which comprises the gas injection nozzle 70 (FIG. 5, FIG. 6) is a small diameter part with a smaller internal diameter than the other part of the fuel gas nozzle 32, and the centerline C1 is 1st step primary air. It is formed so as to overlap (concentrically) with the axial center (center line) X of the suction cylinder 50.

  As described above, in this embodiment, the burner (Bunsen gas burner) 31 from the suction hole 51 of the first-stage primary air suction cylinder 50 due to the ejector effect caused by the fuel gas being injected from the nozzle hole 32a. The combustion air is sucked as the first stage primary air (see FIG. 7).

  7 shows a cross-sectional view taken along line AA in FIG. 6. In FIG. 7, the first-stage primary air sucked from the suction holes 51 is schematically represented by white arrows.

  The fuel gas injected from the nozzle hole 32a and the first stage primary air sucked from the suction hole 51 are mixed in the first stage primary air suction cylinder 50 to become the first mixture. Then, the first air-fuel mixture is injected from the left end 50a (FIGS. 5 and 6) of the first stage primary air suction cylinder 50 into the mixing unit 40 (FIG. 5).

  Then, from the right end of the mixing unit 40 (FIG. 5), the first mixed gas injected into the mixing unit 40 through the left end 50a (FIGS. 5 and 6) of the first stage primary air suction cylinder 50 Due to the ejector effect, the second stage primary air, which is combustion air, is sucked from the mixing unit intake port 40 a on the right side of the mixing unit 40.

  In this way, the second-stage primary air that is the combustion air sucked into the mixing unit 40 is mixed with the first air-fuel mixture in the mixing unit 40, and a stove burner (Bunsen gas burner) is used as the second air-fuel mixture. It is sent to the flame forming part (flame) 41 of 31 and used for the combustion of the stove burner (Bunsen type gas burner) 31.

  In addition, in the vicinity of the flame forming portion (flame port) 41 of the stove burner (Bunsen type gas burner) 31, the secondary air as the combustion air is sucked in by the flame generated in the flame forming portion (flame port) 41, so that it is more reliable. Will be burned.

  The configuration of the gas injection nozzle 70 and the first stage primary air suction cylinder 50 of the present embodiment will be further described. In the gas injection nozzle 70 provided in the gas stove 1, the suction hole 51 in the first stage primary air suction cylinder 50 is provided. The outer surface 52 around the place where the is disposed is a flat surface. The center line C2 of the suction hole 51 that passes through the center of the suction hole 51 and is orthogonal to the plane that is the outer surface 52 does not cross the axis X of the first-stage primary air suction cylinder 50 in a certain direction. It is arranged to be shifted.

The gas injection nozzle provided in the gas stove 1 is configured in this way, and the center line C2 of the suction hole 51 passing through the center of the suction hole 51 and orthogonal to the plane which is the outer surface 52 is the first stage primary air suction cylinder. Since it is arranged in a certain direction so as not to intersect with the axis X of the body 50,
(1) The first air-fuel mixture, in which the fuel gas injected from the nozzle hole 32a and the first-stage primary air sucked from the suction hole 51 are mixed in the first-stage primary air suction cylinder 50, A swirl flow swirling around the axis X of the one-stage primary air suction cylinder 50 is performed,
(2) It becomes possible to make it easy to suck air (first-stage primary air) from the suction hole 51 of the first-stage primary air suction cylinder 50.
As a result, the primary suction rate when the gas flow rate is small can be increased.

  Incidentally, in the present embodiment, the first air-fuel mixture injected from the left end 50a of the first stage primary air suction cylinder 50 becomes a swirl flow swirling counterclockwise in FIG.

  In the present embodiment, the shape of the region where the suction hole 51 is provided in the first stage primary air suction cylinder 50 (formed by the outer surface around the place where the suction hole 51 is provided). The shape of the structure is a polygonal column (in this embodiment, a regular hexagonal column), and is formed on six outer surfaces (planes) and six outer surfaces (planes) where the suction holes 51 are formed. A plurality of six suction holes 51 are provided (see FIGS. 6 and 7).

  And the direction of the moment which makes the 1st air-fuel mixture swirl | swivel by the suction | inhalation of each 1st step primary air attracted | sucked from each suction hole 51 provided with two or more is comprised. The center line C2 is shifted in a certain direction so as not to intersect the axis X of the first stage primary air suction cylinder 50).

  Incidentally, in the present embodiment, the first stage primary air sucked from each of the plurality of suction holes 51 is injected into the mixing unit 40 from the left end 50a of the first stage primary air suction cylinder 50. One mixture is configured to generate a moment that forms a swirl flow swirling counterclockwise in FIG.

  In the present embodiment, the gas injection nozzle 70 is configured as described above so that the first air-fuel mixture becomes a swirl flow swirling around the axis X of the first stage primary air suction cylinder 50. Therefore, the primary suction rate when the gas flow rate is small can be further increased.

  In the present embodiment, as shown in FIG. 6, the plurality of suction holes 51 are formed at the same distance from the tip of the nozzle hole 32a, but the plurality of suction holes 51 are in the first stage. You may comprise so that it may be distributed and arrange | positioned in the position where the flow direction (left-right direction in FIG. 6) of a 1st air-fuel mixture flows along the axial center X of the cylinder 50 for primary air suction.

  With this configuration, it is possible to efficiently form a swirling flow in which the first air-fuel mixture swirls around the axis X of the first stage primary air suction cylinder 50, and the gas flow rate is small. It is possible to provide a gas injection nozzle in a gas stove that can further increase the primary suction rate.

  Further, in the present embodiment, as shown in FIG. 7, the place where the suction hole 51 in the first stage primary air suction cylinder 50 is disposed is a hollow polygonal column (in this embodiment, a regular hexagonal column). In contrast to this, as shown in FIG. 8, the portion where the suction hole 51 is disposed is a massive polygonal column (for example, a regular hexagonal column) 150, and a suction hole is formed in the massive polygonal column 150. You may comprise so that 51 may be drilled.

  When configured in this manner, the depth dimension of the suction hole is increased, so that the straightness of the first-stage primary air sucked from the suction hole is increased, and the effects of the present invention can be further enhanced.

  The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Gas stove 2 Heating part 2a Stove part 2b Grill 6 Gas valve block (gas amount adjustment part)
7 Cooking Setting Unit for Stove 11 Top Plate 12 Front Part 13 Battery Case 14 Point Extinguishing Button 15 Thermal Power Control Lever 21 Gotoku 23 Ignition Device 24 Ignition Detection Device 25 Container Detection Means 26 Temperature Sensor 28 Grill Door 31 Combina Burner )
32 Fuel gas nozzle 32a Nozzle hole 40 Mixing part 40a Mixing part air inlet 41 Flame forming part 50 First stage primary air suction cylinder 50a First stage primary air suction cylinder tip 51 Suction hole 52 Suction hole is provided Outer surface (plane) around the area
60 instrument plug body 61 gas flow path 61a inlet 61b outlet 61c large fire flow path 61d small fire flow path 62 safety valve 63 main valve 65 flow control valve 66 slider 67 valve rod 70 gas injection nozzle 150 massive polygonal column A Gas injection nozzle device C1 Nozzle hole center line C2 Intake hole center line BP Bypass passage LB1, LB2 Latch solenoid valve X Center axis of first stage primary air suction cylinder

Claims (3)

(A) a Bunsen type gas burner by a fuel gas nozzle having a nozzle hole for injecting fuel gas, a gas supply path for supplying fuel gas to the nozzle hole, and an ejector effect by injecting the fuel gas from the nozzle hole A gas injection nozzle comprising a first-stage primary air suction cylinder having a suction hole for sucking first-stage primary air as combustion air of
(B) A first air-fuel mixture obtained by mixing the fuel gas injected from the nozzle hole and the first-stage primary air in the first-stage primary air suction cylinder is the first-stage primary air suction. The second stage primary air as the combustion air of the Bunsen gas burner is sucked and mixed with the second stage primary air and the first air-fuel mixture by the ejector effect caused by being injected from the tip of the cylinder And a gas injection nozzle device used in a Bunsen type gas burner comprising: a mixing unit that forms a second air-fuel mixture used for combustion in a flame forming unit of the Bunsen type gas burner,
The nozzle hole of the fuel gas nozzle is formed as a small diameter portion having a smaller inner diameter than the other part of the fuel gas nozzle so that a center line overlaps with the axis of the first stage primary air suction cylinder, And,
The first stage primary air suction cylinder is configured such that the outer surface around the portion where the suction hole is disposed is a flat surface, and passes through the center of the suction hole. A gas injection nozzle device for a Bunsen type gas burner, characterized in that a center line of the suction hole orthogonal to the certain plane does not intersect the axis of the first stage primary air suction cylinder. . The first-stage primary air suction cylinder is configured as a polygonal cylinder having a plurality of the flat surfaces each provided with the suction holes as an outer surface where the suction holes are provided. And
By sucking air sucked from each of the plurality of suction holes, the first air-fuel mixture, which is a mixture of the fuel gas and the first-stage primary air in the first-stage primary air suction cylinder, The first stage primary air suction cylinder is configured to flow in a uniform moment so that it can be swung in a predetermined direction when viewed in the axial direction. Bunsen gas burner gas injection nozzle device.   The plurality of suction holes are distributed and arranged at different positions in a direction along the flow direction of the fuel gas in the first stage primary air suction cylinder. Bunsen gas burner gas injection nozzle device.

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