KR101764112B1 - Air proportional control device for gas machinery - Google Patents

Abstract

The present invention relates to an air proportional control device for a gas appliance, and more particularly, to an air proportional control device for a gas appliance which can increase the combustion efficiency by regulating inflow of air in proportion to opening of a gas valve.
The present invention relates to a knob which is rotatably installed at an angle. A micro switch disposed at a position adjacent to the knob and connected to an electrical contact while being in contact with an inner surface of the knob when the knob rotates; A gas valve which is electrically connected to the micro switch and opens when the electrical contact of the micro switch is connected to the gas valve; A hollow gas delivery pipe communicating with the gas valve to transfer the gas introduced into the gas valve; An air amount adjusting unit connected to the knob to adjust an amount of air introduced into the gas valve according to a rotation angle of the knob in proportion to an amount of gas flowing into the gas valve when the knob rotates; And a mixing housing coupled to the air quantity adjusting unit and having an inner space formed therein for mixing air and gas supplied from the air quantity adjusting unit and the gas transfer tube. .

Description

TECHNICAL FIELD [0001] The present invention relates to an air proportional control device for a gas appliance,

The present invention relates to an air proportional control device for a gas appliance, and more particularly, to an air proportional control device for a gas appliance which can increase the combustion efficiency by regulating inflow of air in proportion to opening of a gas valve.

Generally, a gas burner used in a combustion device such as a boiler or a water heater can be divided into a Bunsen burner and a pre-mixed burner according to a method of mixing a combustion gas and air.

The Bunsen burner has a merit of excellent combustion stability as a burner that supplies the minimum primary air required for combustion in the nozzle part for injecting gas and realizes complete combustion by supplying secondary air to the part where the flame is formed , The flame is formed by the secondary air, so that the flame length is increased.

The premixed burner burns premixed gas mixed with combustion gas and air in the mixing chamber, which reduces the overall length of the flame while reducing the flame temperature, thereby reducing the load on the same area. The generation of pollutants such as nitrogen oxides can be minimized.

Conventionally, Bunsen burners are mainly used, but in recent years, premixed burners are mainly used to reduce the generation of pollutants and downsize the combustion chambers.

FIG. 1 is a schematic view showing a configuration of a gas appliance provided with an air proportional control device according to a related art, and FIG. 2 is a sectional view of an internal cross section of a mixer connected to a gas pipe in FIG.

1, a gas appliance 100 equipped with an air proportional control device according to the related art includes a blower 110 for sucking outside air, a supply pipe 120 connected to the blower 110, A mixer 140 interposed between the blower 110 and the supply pipe 120 and an air hose 150 having one end connected to one side of the blower 110 and a blower 130 connected to the other end of the blower 110, A gas air control valve 160 connected to the air hose 150 and a gas pipe 170 having one end connected to the gas air control valve 160 and the other end connected to the mixer 140.

2, the mixer 140 is formed with an inner diameter reducing portion communicating with the other end of the gas pipe 170. [ The operation of the gas appliance 100 equipped with the air proportional control device according to the related art will be described as follows. When the blower 110 is driven, the gas air control valve 160 is opened and the air introduced by the blower 110 A venturi effect is generated while passing through the inner diameter reduced portion of the mixer 140, and the gas is introduced from the gas pipe 170 by the pressure difference to mix the air and the gas. Accordingly, a flame is generated as a mixed gas in which air and gas are mixed is supplied to the burner unit 130 through the supply pipe 120.

However, according to the venturi effect by the inner diameter reduction portion of the mixer 140, the gas appliance 100 equipped with the air proportional control device according to the related art induces the inflow of the gas only at the flow rate of the inflow air, There is a problem that it is difficult to finely control the amount of air and gas as well as the ratio is uneven. Accordingly, the mixed gas is supplied to the burner unit 130 in a nonuniform mixing ratio, so that the flame of the burner is unevenly generated and incompletely burned.

KR 10-0960100 B1 (May 31, 2010)

The present invention has been made to solve the above-mentioned conventional problems, and it is an object of the present invention to provide an air proportional control device for a gas appliance capable of increasing combustion efficiency by controlling the mixing ratio of air and gas to be uniform, The purpose of the device is to provide.

It is another object of the present invention to provide an air proportional control device for a gas appliance which can achieve combustion efficiency such as a burner of a high calorific value even with a small size burner, thereby reducing fuel cost.

It is still another object of the present invention to provide an air proportional control apparatus for a gas appliance capable of finely adjusting a mixing amount of gas and air by a simple operation.

According to an aspect of the present invention, there is provided a display device including: a knob rotatably installed at an angle; A micro switch disposed at a position adjacent to the knob and connected to an electrical contact while being in contact with an inner surface of the knob when the knob rotates; A gas valve which is electrically connected to the micro switch and opens when the electrical contact of the micro switch is connected to the gas valve; A hollow gas delivery pipe communicating with the gas valve to transfer the gas introduced into the gas valve; An air amount adjusting unit connected to the knob to adjust an amount of air introduced into the gas valve according to a rotation angle of the knob in proportion to an amount of gas flowing into the gas valve when the knob rotates; And a mixing housing coupled to the air quantity adjusting unit and having an inner space formed therein for mixing air and gas supplied from the air quantity adjusting unit and the gas transfer tube. .

Preferably, the knob has a rib protruding from its inner surface, and a plate spring is provided on one surface of the micro switch facing the inner surface of the knob. When the knob rotates, Electrical contacts are connected while contacting.

The air amount adjusting unit may include: a fixed shaft having one end fixed to an insertion groove formed on an inner surface of the knob; A transverse portion which is arranged in a direction perpendicular to a longitudinal direction of the fixed shaft and in which a first through hole is formed so as to sandwich the fixed shaft in the center thereof and a pair of vertical portions which are bent at right angles to both ends of the transverse portion, ; An air inlet housing having a hollow cylindrical shape and formed with an inflow hole for introducing air into the periphery thereof, one side of which is coupled to a pair of longitudinal ends of the rotation bracket, and the other side of which is coupled to the mixing housing; And a blow fan electrically connected to the micro switch and installed in the mixing housing to receive an electrical signal from the micro switch when the knob rotates. When the knob rotates, , The air inlet housing is preferably rotated integrally.

Preferably, the fixed shaft has a polygonal cross-sectional shape, and the fitting groove and the first through hole correspond to the outer periphery of the fixed shaft so that the fixing shaft is firmly fitted to the first through hole. Do.

Preferably, a first fixing member in the form of a plate fixed to the front surface of the gas valve facing the knob; And one end of the second through hole is fixed to the transverse portion of the pivotal bracket and communicates with the first through hole to form a second through hole in which the fixing shaft is fitted, And a coil spring is installed between the first fixing member and the second fixing member so as to surround the fixing shaft.

Preferably, the diameter of the second through-hole is larger than the diameter of the fixed shaft so that the fixed shaft can be inserted and rotated through the second through hole.

The air inlet housing has a hollow cylindrical shape and is open at the front and rear sides. The air inlet housing is coupled to the one surface to cover the opening formed at one surface of the mixing housing, An inner housing having a front surface formed with an insertion hole into which a gas transfer tube for transferring a gas introduced into the gas valve is inserted; And a second inflow hole formed in a hollow cylindrical shape and having a front surface and a rear surface opened and coupled to a pair of longitudinal portions of the pivotal bracket and having air introduced therearound so that the inner circumferential surface rotates while contacting the outer circumferential surface of the inner housing Wherein a length of the second inflow hole formed along the circumferential direction of the outer housing is formed to be along the circumferential direction of the inner housing, The length of the first inflow hole is longer than the length of the first inflow hole.

Preferably, the second support bracket is composed of a bent plate member, one side of which is fixed to the back surface of the gas valve and the other side is fixed to the inner housing.

According to the means for solving the above-mentioned problems, the present invention has the following effects.

According to the present invention, the electrical contacts of the microswitch are connected by a simple operation of rotating the knob, the gas valve electrically connected to the microswitch is opened, and air is introduced into the air inlet housing in proportion to the amount of gas flowing into the gas valve , And the mixing ratio of air and gas is controlled to be uniform so that complete combustion can be achieved. As a result, the combustion efficiency can be increased.

In addition, the present invention provides a mixed gas in which air and gas are uniformly mixed in a mixed housing, thereby achieving complete combustion, thereby achieving the same combustion efficiency as a high-calor burner even with a small-sized burner, There is an effect that can be saved.

In addition, according to the present invention, the outer circumferential cross-sectional shape of the fixed shaft is formed to be polygonal, and the fitting hole formed in the inner side surface of the knob and the first through hole formed in the lateral portion of the turning bracket are made to correspond to the outer circumference of the fixed shaft, The outer housing of the air inlet housing coupled to the end portion of the pivotal bracket is rotated by a simple operation of rotating the pivot bracket so that the mixing amount of gas and air can be finely adjusted.

The length of the second inflow hole formed along the circumferential direction of the outer housing is longer than the length of the first inflow hole formed along the circumferential direction of the inner housing so that the first inflow hole and the second inflow hole are communicated with each other, There is an effect that the area in which the air flows is controlled when the inner circumferential surface of the inner housing rotates while contacting the inner circumferential surface of the outer housing.

In addition, the present invention provides a first support bracket and a coil spring between the transverse portion of the pivotal bracket and the front surface of the gas valve, thereby reducing the vibration generated when the air proportional control device of the gas appliance according to the present invention is operated . As a result, the mixing amount of air and gas can be finely adjusted.

Further, the present invention provides a second support bracket having one side fixed to the rear surface of the gas valve and the other side fixed to the inner housing, so that the inner housing and the gas valve can be firmly fixed.

FIG. 1 is a schematic view showing a configuration of a gas appliance provided with an air proportional control device according to a related art.
FIG. 2 is an internal cross-sectional view of the mixer connected to the gas pipe in FIG. 1. FIG.
3 is a view showing a gas appliance equipped with an air proportional control device according to the present invention.
FIG. 4 is an enlarged view of the air proportioning control device in FIG. 3; FIG.
5 is an exploded view of an air proportional control device of a gas appliance according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of an air proportional control apparatus for a gas appliance according to the present invention will be described in detail with reference to the accompanying drawings. It is to be understood that the terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and that the inventor should properly interpret the concepts of the terms to best describe their invention It should be construed as meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. In addition, since the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention, It is to be understood that equivalents and modifications are possible.

FIG. 3 is a view showing a gas appliance equipped with an air proportional control device according to the present invention, FIG. 4 is an enlarged view of the air proportional control device in FIG. 3, Fig.

3 to 5, the air proportional control device for a gas appliance according to the preferred embodiment of the present invention includes a knob 10, a micro switch 20, a gas valve 30, a gas delivery pipe 40, An air volume control unit 50, and a mixing housing 60. [

The knob 10 is rotated clockwise to operate the gas appliance, and when the gas appliance is not in use, the knob 10 is rotated counterclockwise to return to the home position. At this time, a rib 14 having a predetermined thickness is formed on the inner side surface 12 of the knob 10 along the circumference thereof. A fitting groove 16 is formed at the center of the inner side surface 12 of the knob 10 so that one end 51a of the fixing shaft 51 to be described later is inserted.

The micro switch 20 is disposed at a position adjacent to the knob 10 and a plate spring 22 is provided on one surface of the micro switch 20 facing the inner side surface 12 of the knob 10, The contact of the plate spring 22 and the rib 14 formed in the knob 10 is established.

Such a micro switch 20 is mainly used for mechanical automatic control, in which there is a portion (referred to as an actuator) which is moved according to the motion of a machine or an apparatus, thereby changing an electric circuit. There are many kinds of microswitches 20 to cope with various use places.

The gas valve 30 is electrically connected to the micro switch 20 and is opened to receive an electrical signal when the electrical contact of the micro switch 20 is connected.

The gas transfer pipe 40 is hollow and has one end connected to the gas valve 30 and the other end inserted into the inner housing 56 of the air inlet housing 55 to be described later. Thus, the gas introduced into the gas valve 30 is transferred to the inner housing 56 through the gas transfer pipe 40.

The air amount control unit 50 is connected to the knob 10 to control the amount of air flowing into the inside of the knob 10 in accordance with the rotation angle of the knob 10 in proportion to the amount of gas flowing into the gas valve 30 when the knob 10 rotates. And includes a stationary shaft 51, a rotating bracket 52, an air inlet housing 55, and a blow fan 58. The stationary shaft 51,

The fixed shaft 51 is fixed to the fitting groove 16 formed on the inner side surface 12 of the knob 10 by being inserted into the fitting groove 16 and has an outer peripheral cross- The first through hole 53a formed in the fitting groove 16 and laterally portions 53 of the pivotal bracket 52 to be described later is formed in a rectangular shape corresponding to the outer periphery of the fixed shaft 51 and is inserted into the fitting groove 16, The fixing shaft 51 is firmly fitted into the hole 53a. The outer peripheral end face, the fitting groove 16, and the first through hole 53a of the fixed shaft 51 may be replaced with a polygon having a triangular shape, pentagonal shape, or any other shape.

As described above, the fixing shaft 51 has a polygonal outer peripheral cross-section, and the fitting groove 16 formed in the inner side face 12 of the knob 10 and the flange portion 53 formed on the lateral portion 53 of the pivot bracket 52 The through hole 53a is made to correspond to the outer periphery of the fixed shaft 51 so that the air inlet housing 55 coupled to the head portion 54 of the turning bracket 52 can be rotated by a simple operation of rotating the knob 10, So that the mixing amount of gas and air can be finely adjusted.

The pivotal bracket 52 includes a transverse portion 53 having a first through hole 53a formed in a direction perpendicular to the longitudinal direction of the fixed shaft 51 and having a fixing shaft 51 fitted in the center thereof, And a pair of vertical portions 54 which are bent at right angles from both ends and extend in the opposite direction opposite to the knob 10.

The air inlet housing 55 has a hollow cylindrical shape and is formed with an inflow hole into which air is introduced. One side of the air inlet housing 55 is coupled with a pair of vertical portions 54 of the rotation bracket 52, Lt; / RTI >

The air inlet housing 55 is composed of an inner housing 56 and an outer housing 57.

The inner housing 56 has a hollow cylindrical shape and has a front surface and a rear surface opened and a bolt B on one surface 64 so as to cover an opening 64a formed in one surface 64 of the mixing housing 60 A first inlet hole 56a through which air is introduced is formed on the periphery and a fitting hole 56b through which the gas feeding pipe 40 through which gas introduced into the gas valve 30 is inserted is inserted do. A first fastening hole 56c is formed on the front surface and is fastened to the other side 84 of a second supporting bracket 80 to be described later with bolts B. [

The outer housing 57 is formed in a hollow cylindrical shape so that the front and rear surfaces thereof are opened and the second fastening hole 57b is formed on the side surface so as to be coupled with the pair of end portions 54 of the pivotal bracket 52 by bolts B, A second inflow hole 57a into which air flows is formed and the inner circumferential surface of the second inflow hole 57a is rotated so as to be in contact with the outer circumferential surface of the inner housing 56. [

The length of the second inflow hole 57a formed along the circumferential direction of the outer housing 57 is longer than the length of the inner housing 56. In this case, the first inflow hole 56a and the second inflow hole 57a communicate with each other, The length of the first inflow hole 56a formed along the circumferential direction of the outer housing 57 is longer than the length of the first inflow hole 56a formed along the circumferential direction of the outer housing 57. Accordingly, when the inner circumference of the outer housing 57 contacts the outer circumference of the inner housing 56, can do.

The blow fan 58 is electrically connected to the micro switch 20 and is installed in the mixing housing 60 to receive electrical signals from the micro switch 20 when the knob 10 rotates. The blow fan 58 serves to introduce air from the outside into the air inlet housing 55 and to mix the gas and the air well in the mixing housing 60.

Meanwhile, when the user rotates the knob 10 in the clockwise direction, the fixing shaft 51, the rotation bracket 52, and the outer housing 57 rotate integrally. At this time, depending on the rotation angle of the knob 10 The degree of opening and closing of the gas valve 30 and the area of the air flowing into the air inlet housing 55 are adjusted.

The mixing housing 60 is formed with a third fastening hole 64b on one surface 64 and is coupled to the inner housing 56 of the air volume control unit 50 with bolts B and is provided with an opening The inner space 62 is formed so that the air and the gas supplied from the air volume control unit 50 and the gas transfer pipe 40 are mixed with each other. The mixed gas moving tube 2 is connected to the mixing housing 60 so that the mixed gas mixed in the inner space 62 of the mixing housing 60 is supplied to the burner 3.

The gas valve 30 electrically connected to the microswitch 20 is opened by connecting the electrical contacts of the microswitch 20 by a simple operation of rotating the knob 10 and the gas introduced into the gas valve 30 The air is introduced into the air inlet housing 55 in proportion to the amount of the air, so that the mixing ratio of the air and the gas becomes uniform so that the complete combustion can be achieved. As a result, the combustion efficiency can be increased.

In addition, a mixed gas in which air and gas are uniformly mixed in the mixing housing 60 is supplied to the burner 3 through the mixed gas moving tube 2 so as to be completely burned. Thus, even with a burner of a small size, It is possible to reduce the fuel cost.

A first support bracket 70 is provided between the transverse portion 53 of the pivotal bracket 52 and the front surface of the gas valve 30. The first support bracket 70 includes a first fixing member 72, 2 fixing member 74 as shown in Fig.

The first fixing member 72 is plate-shaped and fixed to the front surface of the gas valve 30 opposed to the knob 10.

The second fixing member 74 has a plate shape in which both ends are bent and one side which is an intermediate portion is fixed to the transverse portion 53 of the pivotal bracket 52 and has a first through hole 53a Through which the fixing shaft 51 is fitted and the other side which is bent at both ends is fixed to the first fixing member 72 with the bolts B. [

At this time, a coil spring S is installed between the first fixing member 72 and the second fixing member 74 so as to surround the fixing shaft 51.

By providing the first support bracket 70 and the coil spring S as described above, it is possible to alleviate vibration generated when the air proportional control device of the gas appliance is operated. Therefore, the mixing amount of air and gas can be finely adjusted .

The diameter of the second through hole 74a formed in the second fixing member 74 is larger than the diameter of the fixing shaft 51 so that the fixing shaft 51 is fitted to the second through hole 74a without being constrained It can rotate.

The second support bracket 80 is formed of a plate member bent in a diagonal shape and one side 82 is fixed to the rear surface of the gas valve 30 and the other side 84 is fixed to the inner housing 56 So that the inner housing 56 and the gas valve 30 can be firmly fixed.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Will be apparent to those of ordinary skill in the art.

10: knob 20: micro switch
30: Gas valve 40: Gas transfer tube
50: air amount adjusting unit 51: fixed shaft
52: rotation bracket 55: air inflow housing
56: inner housing 56a: first inlet hole
57: outer housing 57a: second inflow hole
60: mixing housing 70: first support bracket
80: second support bracket S: coil spring

Claims (8)

A knob rotatably installed at an angle; A micro switch disposed at a position adjacent to the knob and connected to an electrical contact while being in contact with an inner surface of the knob when the knob rotates; A gas valve which is electrically connected to the micro switch and opens when the electrical contact of the micro switch is connected to the gas valve; A hollow gas delivery pipe communicating with the gas valve to transfer the gas introduced into the gas valve; An air amount adjusting unit connected to the knob to adjust an amount of air introduced into the gas valve according to a rotation angle of the knob in proportion to an amount of gas flowing into the gas valve when the knob rotates; And a mixing housing coupled to the air volume adjusting unit to form an internal space for mixing air and gas supplied from the air volume adjusting unit and the gas transfer tube,
The air amount adjusting unit includes:
A fixed shaft having one end fixed to an insertion groove formed on an inner surface of the knob; A transverse portion which is arranged in a direction perpendicular to a longitudinal direction of the fixed shaft and in which a first through hole is formed so as to sandwich the fixed shaft in the center thereof and a pair of vertical portions which are bent at right angles to both ends of the transverse portion, ; An air inlet housing having a hollow cylindrical shape and formed with an inflow hole for introducing air into the periphery thereof, one side of which is coupled to a pair of longitudinal ends of the rotation bracket, and the other side of which is coupled to the mixing housing; And a blow fan electrically connected to the micro switch and installed in the mixing housing to receive an electrical signal from the micro switch when the knob rotates,
Wherein the fixed shaft, the rotating bracket, and the air inlet housing are integrally rotated when the knob rotates.
The method according to claim 1,
Wherein the knob has a rib protruding from an inner surface thereof,
A plate spring is provided on one surface of the micro switch facing the inner surface of the knob,
Wherein when the knob rotates, the plate spring is brought into contact with a rib formed in the knob, and electrical contacts are connected to the air spring.
delete The method according to claim 1,
Wherein the fixing shaft has a polygonal cross-sectional shape, and the fitting groove and the first through hole correspond to the outer periphery of the fixing shaft, so that the fixing shaft is firmly fitted to the first through hole Air proportional control device for gas appliances.
The method according to claim 1,
A first fixing member in the form of a plate fixed to the front surface of the gas valve facing the knob; And
Wherein one end of the second through hole is fixed to a lateral side of the pivotal bracket and communicates with the first through hole to form a second through hole in which the fixing shaft is inserted and the other side is fixed to the first fixing member And a second fixing member,
And a coil spring is installed between the first fixing member and the second fixing member so as to surround the fixing shaft.
The method of claim 5,
Wherein the diameter of the second through hole is larger than the diameter of the fixed shaft so that the fixed shaft can be rotated by being inserted into the second through hole.
The method according to claim 1,
The air inlet housing includes:
A first inlet hole connected to one surface of the housing to cover an opening formed on one surface of the mixing housing and having air introduced thereinto, and a gas valve An inner housing having an insertion hole in which a gas transfer tube through which the introduced gas is transferred is formed; And
A second inlet hole is formed in the periphery of the rotating bracket so as to allow air to flow therethrough and the inner circumferential surface is rotated to contact the outer circumferential surface of the inner housing An outer housing,
Wherein the length of the second inflow hole formed along the circumferential direction of the outer housing is greater than the length of the first inflow hole formed along the circumferential direction of the inner housing so that the first inflow hole and the second inflow hole communicate with each other, And the air flow rate of the air is proportional to the air flow rate.
The method of claim 7,
And a second support bracket which is composed of a bent plate member and has one side fixed to the rear surface of the gas valve and the other side fixed to the inner housing.

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