JP6076298B2 - Thermal power control device and manufacturing method thereof - Google Patents

Description

  The present invention relates to a thermal power adjusting device that is incorporated in a gas stove device or the like and adjusts the thermal power of a gas burner, and a method for manufacturing the same.

  As a conventional thermal power control device of this type, a thermal power control device is provided with a needle valve for adjusting the flow rate, and after the flow rate of the gas introduced into the main body is adjusted by the needle valve, it is ejected from the nozzle hole. (For example, refer to Patent Document 1).

  Since the gas is ejected from the nozzle hole at a high speed, the gas flow flows to the gas burner while drawing the air around the gas flow by the ejector effect. The gas burner is composed of a burner head part to which a burner cap is attached, and a mixing pipe part that supplies a mixture of gas and air to the burner head part, and the gas blown out from the nozzle is drawn into the surrounding air And enters the mixing tube.

  At this time, if the positional relationship between the nozzle hole and the mixing tube portion of the burner varies, the combustion state also varies, so the mixing tube portion needs to be positioned with respect to the nozzle hole. Therefore, in what was described in the said patent document 1, the cylindrical part which positions a mixing pipe part is integrally formed in the main body of a thermal-power control apparatus, and the nozzle hole is formed in the bottom part of the cylindrical part.

JP 2007-278361 A (FIGS. 2 to 4)

  As described above, when the nozzle hole is formed in the bottom portion of the cylindrical portion, the periphery of the nozzle hole is surrounded by the peripheral wall of the cylindrical portion, and therefore air cannot be drawn by the ejector effect. Therefore, the device described in Patent Document 1 is configured such that a round hole is formed in the peripheral wall of the tubular portion, and air is drawn into the tubular portion from the round hole.

  However, in such a configuration, a sufficient opening area of the round hole cannot be ensured, so that there is a problem that the amount of air drawn into the gas flow is insufficient. In order to increase the opening area of the round hole, not only the number of processing steps is increased, but the remaining part of the cylindrical part is reduced, so that the strength of the cylindrical part is reduced. Have difficulty.

  Then, this invention makes it a subject to provide the thermal-power adjustment apparatus which can fully perform air drawing-in by an ejector effect, and its manufacturing method in view of said problem.

In order to solve the above-described problem, a thermal power control apparatus according to the present invention includes a nozzle portion that discharges gas toward a mixing tube portion that is continuously provided in a burner head of a gas burner, and the gas discharged from the nozzle portion is In the thermal power control device that adjusts the thermal power of the gas burner by increasing or decreasing the amount of gas jetted from the nozzle part while flowing into the mixing pipe part of the gas burner while drawing the air around the nozzle part due to the ejector effect, There is a nozzle hole to be ejected, a holding part is extended from the nozzle part toward the gas burner, the inner cylinder surface is located on the same line as the nozzle hole, and there is a predetermined distance from the nozzle hole to the gas burner side. a position, through the holding portion forms a positioning tube portion integrally with the nozzle portion, the positioning hole formed in the mixing tube portion inlet of the gas burner By inserting the positioning cylindrical portion, together with the positioning of the gas burner in the outer cylinder surface of the positioning tube portion, and characterized by directing a gas and air mixing tube portion of the gas burner through the inside of the positioning tube portion To do.
Further, another thermal power control apparatus according to the present invention includes a nozzle portion that discharges gas toward a mixing tube portion that is continuously provided on the burner head of the gas burner, and the gas discharged from the nozzle portion is caused by the ejector effect. In a thermal power control apparatus that adjusts the thermal power of the gas burner by increasing or decreasing the amount of gas jetted from the nozzle section while flowing into the mixing pipe section of the gas burner while drawing air around the nozzle section, the nozzle section is a nozzle that ejects gas A holding part is provided extending from the nozzle part toward the gas burner, and the positioning cylinder part is held at a position that is coaxial with the nozzle hole and at a predetermined distance from the nozzle hole to the gas burner side. The gas burner is inserted into the positioning hole formed at the inlet of the mixing tube of the gas burner and inserted into the positioning hole. Performs positioning, below the nozzle unit, characterized in that the formation of the guiding portion for guiding the liquid material passing through the nozzle portion in a predetermined direction.

  According to the above configuration, since the positioning cylinder part is provided at a predetermined distance from the nozzle part, ambient air can be drawn into the gas flow through the space between the positioning cylinder part and the nozzle part.

  In addition, it is desirable to form the holding part so as to be positioned at least above the nozzle hole so that liquid material such as spilled liquid dripping from above does not reach the nozzle hole.

Also, below the nozzle unit to form a guiding portion for guiding the liquid material passing through the nozzle portion in a predetermined direction.

On the other hand, in order to solve the above-described problem, a method for manufacturing a thermal power control apparatus according to the present invention is formed by integrally forming a portion to be the positioning cylinder part and a part to be the nozzle part in a main body of the thermal power control apparatus. the formation of the inner circumferential surface of the positioning tube portion in a fixed state and O with drilling of the nozzle holes of the nozzle portion, by performing without releasing the fixed relative to the body in the middle, the inner cylindrical surface of the positioning tubular portion of the nozzle bore It forms so that it may be located on a coaxial line.

Thus, by performing the O by drilling the nozzle orifice formation and the nozzle portion of the inner cylindrical surface of the positioning tube portion in a state of fixing the said body, coaxial with the nozzle hole inner circumferential surface of the positioning tube portion It can form so that it may be located in.

  The part that becomes the positioning cylinder part and the part that becomes the nozzle part are connected by a plate-like part that is thinner than the inner diameter of the positioning cylinder part, and the toothing that forms the inner cylinder surface of the positioning cylinder part is positioned in the positioning cylinder part. A part of the plate-like part is cut by advancing from the nozzle to the nozzle part, and a passage of air drawn in by the ejector effect is secured, and the part left by the cutting of the plate-like part becomes the holding part. If it manufactures, formation of the inner cylinder surface of a positioning cylinder part and securing of the channel | path of the air drawn in by an ejector effect can be performed by 1 process.

  As is clear from the above description, in the thermal power control apparatus according to the present invention, since a space can be provided between the positioning cylinder portion and the nozzle portion, sufficient air can be drawn into the gas flow through the space. The combustion state in the gas burner can be improved.

The perspective view which shows the external appearance of the thermal power control apparatus of this invention Perspective view showing the shape of the gas burner The figure which shows the positioning state of a thermal-power control apparatus and a gas burner Diagram showing details of positioning cylinder and nozzle The figure which shows the processing process of a positioning cylinder part and a nozzle part The figure which shows the fixed state of the thermal power control device

  Referring to FIG. 1, reference numeral 1 denotes a thermal power adjusting device incorporated in a gas stove device. An internal pipe P through which a gas supplied from the outside flows is laid under the thermal power control apparatus 1, and the thermal power control apparatus 1 is connected to the internal pipe P and receives supply of gas from the internal pipe P. .

  The thermal power control device 1 is provided with a thermal power control lever 11 that protrudes to the front side of the gas stove device. By swinging the thermal power control lever 11 in the left-right direction, a needle valve (not shown) in the thermal power control device 1 is provided. ) Is advanced and retracted to increase or decrease the gas flow rate. And the gas which passed the needle valve is ejected from the nozzle part 2 in the left direction in the figure.

  A positioning cylinder part 21 is disposed at a position at a predetermined distance in front of the nozzle part 2 in the ejection direction. This positioning cylinder portion 21 is for positioning the gas burner with respect to the thermal power control apparatus 1.

  Referring to FIG. 2, reference numeral 3 denotes a gas burner, and a mixing pipe portion 31 and a burner head portion 32 are formed on a sheet metal body of the gas burner. The gas ejected from the nozzle portion 2 enters the mixing tube portion 31 together with the air drawn by the ejector effect, and the air and the gas are mixed in the mixing tube portion 31 and moved to the burner head portion 32. A burner cap 33 is placed on the burner head portion 32, and an air-fuel mixture of gas and air is released from a flame port formed in the burner cap 33 and burns. A plate-like cap 34 is fitted into the opening of the mixing tube portion 31, and a positioning hole 35 is formed in the center of the cap 34.

  Referring also to FIG. 3, the positioning cylinder portion 21 of the thermal power adjusting device 1 is inserted into the positioning hole 35 on the gas burner 3 side, whereby the gas burner 3 is positioned with respect to the thermal power adjusting device 1.

  Referring to FIG. 4, nozzle hole 22 through which gas is ejected is formed in nozzle portion 2, and inner cylinder surface 25 of positioning cylinder portion 21 is formed so as to be positioned on the same axis with respect to nozzle hole 22. ing. The positioning cylinder portion 21 is held by a pair of upper and lower holding portions 23, 24 formed in the nozzle portion 2, and is held at a predetermined distance along the gas ejection direction with respect to the nozzle hole 22. Has been. Therefore, a space is secured between the nozzle hole 22 and the positioning cylinder portion 21, and the air drawn into the gas flow ejected from the nozzle hole 22 by the ejector effect is drawn through the space. In the present embodiment, since the holding portions 23 and 24 are provided in a pair of upper and lower sides, the space is greatly opened to the left and right, and sufficient air can be drawn into the gas flow. In addition, the holding portions 23 and 24 may be formed in a pair of left and right instead of a pair of upper and lower to open the space in the vertical direction. However, in the present embodiment, the holding portion 23 is formed above the nozzle hole 22. Even if a liquid material such as spilled liquid flows from above, the holding portion 23 becomes a trap of the nozzle hole 22, and the liquid material can be prevented from reaching the nozzle hole 22.

  Note that the holding portion may not be a pair, and for example, the positioning cylinder portion 21 may be held only by the upper holding portion 23. By the way, since the tapered surface 26 is provided on the outer periphery of the nozzle portion 2, the flow of the drawn air can be made smooth so that the air can be drawn more stably into the gas flow. Reference numeral 12 denotes a guide portion formed integrally with the main body, and the flow is guided in a predetermined direction so that the liquid material that has passed through the nozzle portion 2 does not reach the electrical system components.

  Next, a process of forming the inner cylinder surface 25 of the positioning cylinder portion 21 and the nozzle hole 22 will be described with reference to FIG. The main body of the thermal power control apparatus 1 is formed by aluminum die casting. Initially, the positioning cylinder portion 21 has only a hole 21a smaller than the diameter of the inner cylinder surface 25, and the inner cylinder surface 25 is formed. Absent. Further, a space is not formed between the positioning cylinder portion 21 and the nozzle portion 2, and a plate-like portion 27 is formed, and the nozzle portion 2, the positioning cylinder portion 21, and the like are interposed via the plate-like portion 27. Are continuous. The holding parts 23 and 24 are connected via the plate-like part 27. The dimension in the thickness direction of the plate-like portion 27 is formed thinner than the diameter of the inner cylinder surface 25 of the positioning cylinder portion 21.

  An unprocessed main body is fixed to a processing jig in a processing apparatus (not shown). Then, the inner cylinder surface 25 is formed by drilling the positioning cylinder portion 21 with the drill tooth tool D. In the present embodiment, the inner cylindrical surface 25 and the nozzle hole 22 are formed by simultaneous machining using a two-stage drill tooth tool D as shown in the figure, but there is a problem in chip discharge and the like. If it is, you may form the inner cylinder surface 25 and the nozzle hole 22 with a separate tooth implement. In this case, the nozzle hole 22 is formed after the inner cylinder surface 25 is formed first, but the inner cylinder is not released by not releasing the fixing of the heating power adjusting device 1 to the main body while replacing the tooth tool. Processing is performed so that the surface 25 is positioned on the coaxial line of the nozzle hole 22.

  Moreover, when processing the inner cylinder surface 25, after forming the inner cylinder surface 25, the feed of the drill tooth tool D was not stopped, but it advanced further and the plate-shaped part 27 was deleted. By processing in this way, in the step of forming the inner cylindrical surface 25, the plate-like portion 27 is simultaneously deleted to form a space, and both the holding portions 23 and 24 are divided vertically, and the end surface of the nozzle portion 2 is further formed. 22a can be formed.

  By the way, although the thermal-power adjustment apparatus 1 is connected with the internal piping P as mentioned above, holding | maintenance intensity | strength is insufficient as it is. Then, as shown in FIG. 6, it fixed to the beam member 41 provided in the near side upper part of the gas stove apparatus. Specifically, the stopper 13 is fixed to the upper part of the main body of the thermal power control apparatus 1, and the stopper 13 is fixed to the beam member 41. In addition, since the internal piping P is being fixed to the lower structure member 42 via the bracket 42a, the thermal-power adjustment apparatus 1 will be firmly hold | maintained in a gas stove apparatus.

  In addition, this invention is not limited to an above-described form, You may add a various change in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 1 Thermal power control apparatus 2 Nozzle part 3 Gas burner 11 Thermal power control lever 21 Positioning cylinder part 22 Nozzle hole 23 Holding part 24 Holding part 27 Plate-shaped part 31 Mixing pipe part 32 Burner head part 33 Burner cap 35 Positioning hole D Two-stage drill tooth tool P Internal piping

Claims (5)

A gas burner mixing tube having a nozzle portion that discharges gas toward a mixing tube portion that is continuously provided in the burner head of the gas burner, and the gas discharged from the nozzle portion draws air around the nozzle portion due to the ejector effect In the thermal power control device that adjusts the thermal power of the gas burner by flowing in and out of the nozzle and increasing or decreasing the amount of gas jetted from the nozzle, the nozzle has a nozzle hole for jetting gas and is directed from the nozzle to the gas burner. to extend the holding portion Te, at a position inner tubular surface that exist the predetermined distance as well as positioned in the nozzle bore coaxial line, and the nozzle hole burner side, positioned integrally with the nozzle portion through the holding portion forming a cylindrical portion, by inserting the positioning tubular portion into the positioning holes formed in the mixing tube portion inlet of the gas burner, the positioning It performs positioning of the gas burner in the outer cylinder surface of the parts, combustion control apparatus characterized by directing through the interior of the positioning tubular portion and a gas and air mixing tube portion of the gas burner. A gas burner mixing tube having a nozzle portion that discharges gas toward a mixing tube portion that is continuously provided in the burner head of the gas burner, and the gas discharged from the nozzle portion draws air around the nozzle portion due to the ejector effect In the thermal power control device that adjusts the thermal power of the gas burner by flowing in and out of the nozzle and increasing or decreasing the amount of gas jetted from the nozzle, the nozzle has a nozzle hole for jetting gas and is directed from the nozzle to the gas burner. The holding cylinder is held by the holding part at a position on the same axis as the nozzle hole and at a predetermined distance from the nozzle hole to the gas burner side, and the mixing pipe part entrance of the gas burner is by inserting the positioning tubular portion into the positioning hole formed in, together with the positioning of the gas burner, the nozzle unit Downward, combustion control apparatus characterized by forming the guiding portion for guiding the liquid material passing through the nozzle portion in a predetermined direction. Formed so as to be positioned above the at least nozzle holes of the holding portion, claim liquid material, such as spillage boiled dripping from above is characterized in that so as not to reach the nozzle hole 1 or claim 2 The thermal power control apparatus as described in. The method for manufacturing a thermal power control apparatus according to claim 1, wherein a portion to be the positioning cylinder part and a part to be the nozzle part are integrally formed on a main body of the thermal power control apparatus, and the main body is fixed. The inner cylinder surface of the positioning cylinder part and the drilling of the nozzle hole of the nozzle part are performed without releasing the fixing to the main body on the way, so that the inner cylinder surface of the positioning cylinder part is placed on the coaxial line of the nozzle hole. A method for manufacturing a thermal power control device, wherein the thermal power control device is formed so as to be positioned.   The part that becomes the positioning cylinder part and the part that becomes the nozzle part are connected by a plate-like part that is thinner than the inner diameter of the positioning cylinder part, and the toothing that forms the inner cylinder surface of the positioning cylinder part is connected to the nozzle from the positioning cylinder part. A part of the plate-like part was cut by moving toward the part, and the passage of the air drawn in by the ejector effect was secured, and the part left by the cutting of the plate-like part was made the holding part. The manufacturing method of the thermal-power adjustment apparatus of Claim 4 characterized by these.

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