JP2628324B2 - Ratio control valve device for gas burner - Google Patents

Description

Description: Object of the Invention [Industrial application field] The present invention relates to a ratio control valve device which is used for a gas burner and controls the amount of air and raw gas supplied to the burner.

(Prior art)

In order to perform complete combustion in the gas burner, it is necessary to secure an optimal ratio between the raw gas amount and the air amount.

Here, this ratio is different in the case of large combustion and in the case of small combustion, in order to prevent the lift and backfire of the flame.

The inventor has devised a device for adjusting the ratio between the amount of air and the amount of raw gas by a control unit of a gas burner, and has already filed an application.

[Problems of the prior art]

By the way, the air supplied to the burner includes primary air mixed and supplied with raw gas and secondary air supplied alone.

Here, although the secondary air is for assisting the combustion of the air-fuel mixture, in the conventional device, the supply amount to the gas burner was adjusted by a valve structure,
The structure of the control section is complicated.

(Structure of the Invention) [Means for Solving the Problems] The present invention has been made to solve the above-mentioned inconvenience, and has a control unit having an air chamber, a raw gas chamber, and a mixture chamber. And a gas burner section having a secondary air storage chamber and an air-fuel mixture storage chamber. The air chamber is provided with an air inlet, and the air chamber communicates with the secondary air storage chamber of the gas burner section. The mixture chamber communicates with the mixture chamber of the burner section, and a control valve is provided on the control section so that an operating rod can be moved forward and backward, and an opening degree is increased or decreased according to the movement of the operating rod. And a primary air amount adjusting valve, and the operating rod is operated by appropriately moving the operating rod by an actuator to operate the adjusting valve, and the primary air amount flowing from the air chamber into the air-fuel mixture chamber and the raw gas chamber. And a ratio control valve device for a gas burner for adjusting the amount of raw gas flowing into the mixture chamber.

[Function of the invention]

The gas burner ratio control valve device according to the present invention includes: a control unit having an air chamber, a raw gas chamber, and an air-fuel mixture chamber; and a gas burner unit having a secondary air storage chamber and an air-fuel mixture storage chamber. The air chamber is provided with an air inlet, and the air chamber communicates with the secondary air storage chamber of the gas burner unit. The air-fuel mixture chamber communicates with the air-fuel mixture chamber of the burner unit. The operating rod is provided so as to be able to move forward and backward, and a raw gas amount adjusting valve and a primary air amount adjusting valve which increase and decrease the opening with the moving of the operating rod are provided, and the operating rod is moved forward and backward by an appropriate actuator. The control valve is operated to adjust the amount of primary air flowing from the air chamber into the air-fuel mixture chamber and the amount of raw gas flowing from the raw gas chamber into the air-fuel mixture chamber.

That is, since the air chamber of the control section communicates with the secondary air storage chamber of the gas burner, the secondary air is always supplied to the secondary empty storage chamber of the gas burner regardless of the movement of the operating rod. Things.

[Explanation of Example]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

 1 to 3 show a first embodiment.

In the figure, reference numeral 1 denotes a burner section of a gas hot water supply apparatus, and 2 denotes a control section, which controls the amount of raw gas and the amount of air supplied to the burner section 1. These burner parts 1
And the control part 2 is integrally formed via the box 3.

 First, the control unit 2 will be described.

An air inlet 31 is formed in the control unit 2. The outlet of a blower (not shown) is connected to the air inlet 31. Reference numeral 32 denotes an annular valve seat, which is fixed to the box 3. The valve seat 32 divides the inside of the housing 3 into an air chamber 321 and a mixture chamber 322. The inner wall surface of the valve seat 32 is tapered, and its function will be described later.

Reference numeral 4 denotes a support cylinder, which is fixed to the box 3. The support tube 4 projects into the box 3 and guides the advance / retreat of an advance / retreat tube 71 described later. Reference numeral 41 denotes a raw gas introduction path, which is formed in the support cylinder 4. The raw gas introduction path 41 guides the raw gas into the support cylinder 4. Reference numeral 5 denotes a cylindrical valve housing member, which is fitted inside the support cylinder 4 and fixed by a nut 51. The inside of the valve box member 5 corresponds to the raw gas chamber 54 of the present invention. 52
Is an annular valve seat, which is fixed to the distal end port of the valve box member 5. The function of the valve seat 52 will be described later. Reference numeral 53 denotes a shaft hole formed in the right end portion (in FIG. 1) of the valve box member 5, and reference numeral 6 denotes an operating rod inserted into the shaft hole 53 so as to be able to advance and retreat. Numeral 61 denotes a valve body which is formed integrally with the operating rod 6. The outer wall surface of the valve body 61 is formed in a tapered shape, and the annular valve seat is provided.
Together with 52, the raw gas amount control valve G of the present invention is constituted. The raw gas amount control valve G increases or decreases the opening area of the operating rod 6 when the operating rod 6 advances and retreats, and adjusts the amount of raw gas passing therethrough.

Reference numeral 7 denotes a disc-shaped valve body, which is fixed to a tip of the operating rod 6 by a nut 61. Therefore, the valve element 7 advances and retreats as the operating rod 6 advances and retreats. Reference numeral 71 denotes a reciprocating cylinder, which is bored on the back surface of the valve element 7. The advance / retreat cylinder 71 is fitted in the support cylinder 4 so as to be able to advance / retreat in an airtight state. 7
Are ejection holes formed radially on the back of the valve body 7. The ejection hole 72 communicates the inside of the advance / retreat cylinder 71 with the mixture 322. Therefore, the raw gas in the advance / retreat cylinder 71 flows into the air-fuel mixture chamber 322 through the ejection holes 72, 72,. The valve body 7 constitutes a primary air amount adjusting valve A together with the valve seat 32. This primary air amount control valve A is
By moving the operating rod 6 forward and backward, the opening area is increased or decreased, and the amount of primary air flowing into the mixture chamber 322 is adjusted.

 Next, the burner unit 1 will be described.

In the figure, 11 is a burner head plate and 12 is this burner head plate
11 is an air-fuel mixture accommodation chamber formed on the lower surface of 11. The mixture chamber 12 communicates with the mixture chamber 322 of the control unit 2. Reference numerals 111, 111,... Denote flame outlets, which are formed in the burner head plate 11. The flame outlets 111, 111,... Cause the mixed group to blow out of the burner head plate 11. The jetted air-fuel mixture forms an internal flame L by being added. Reference numeral 13 denotes a secondary air pipe, which is installed above the burner head plate 11. This secondary air pipe 13
Is the secondary air storage chamber (formed on the gas burner) 14
To the air chamber 321 of the control unit 2. 131,131, ... are pores and the secondary air pipe 13
It is pierced. The small holes 131, 131,... Eject secondary air above the inner flame L. The jetted secondary air assists the combustion of the air-fuel mixture and forms an outer flame H above the inner flame L. Fifteen
Denotes a heat exchanger, which is installed above the external flame H. This heat exchanger 15 heats water to turn it into hot water.

 Next, the operation of this embodiment will be described.

The operating rod 6 is moved to the left (first
(In the figure), that is, when pushed in, the opening areas of the raw gas amount control valve G and the primary air amount control valve A increase.
Therefore, as a result of an increase in the amount of air-fuel mixture supplied to the air-fuel mixture chamber 322 and, consequently, the gas burner unit 1, the amount of combustion heat of the burner unit 1 increases (see the state of the phantom line in FIG. 1). When the operation of the actuator is completed, the operation rod 6 returns to the original state by the action of the return spring (not shown).

The secondary air is always and freely supplied from the air chamber 322 of the control unit 2 to the gas burner unit 1.

Further, if the guide plate 8 is provided in the gas mixture chamber 322 of the control unit 2, the gas can be supplied to the entire gas mixture accommodation chamber 12 of the gas burner unit 1 under uniform pressure (see the phantom line in FIG. 1).

 4 and 5 show a second embodiment.

In the second embodiment, the taper of the valve body 61 of the raw gas control valve G and the taper of the valve seat 32 of the primary air control valve A are reversed.

 For this reason, the operation is reversed from that of the first embodiment.

That is, when the operating rod 6 is appropriately moved rightward (in FIG. 4) by the actuator, that is, pulled out, the opening areas of the raw gas amount adjusting valve G and the primary air amount adjusting valve A increase. As a result, the amount of air-fuel mixture supplied to the air-fuel mixture chamber 322 and, consequently, the gas burner 1 increases, and as a result,
(See the state of the phantom line in FIG. 1).
When the operation of the actuator is completed, the operation rod 6 returns to the original state by the action of the return spring (not shown).

[Effects of the Invention] A gas burner ratio control valve device according to the present invention is a gas burner having a control unit having an air chamber, a raw gas chamber, and a mixture chamber, and a secondary air storage chamber and a mixture storage chamber. An air inlet port is provided in the air chamber, and the air chamber communicates with the secondary air storage chamber of the gas burner section, and the air-fuel mixture chamber communicates with the air-fuel mixture storage chamber of the gas burner section. The control unit further includes a raw gas amount adjusting valve and a primary air amount adjusting valve that are provided with an operating rod that can be advanced and retracted and that increase or decrease the opening according to the advancement or retreat of the operating rod. The control valve is actuated by moving forward and backward to adjust the amount of primary air flowing from the air chamber into the air-fuel mixture chamber and the amount of raw gas flowing from the raw gas chamber into the air-fuel mixture chamber. That.

That is, since the air chamber of the control section communicates with the secondary air storage chamber of the gas burner, the secondary air is always supplied to the secondary air storage chamber of the gas burner regardless of the reciprocation of the operating rod. Things.

Therefore, if this device is used, it is only necessary to adjust the amount of air-fuel mixture, so that the structure of the control unit is simplified.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of a gas burner ratio control valve device according to the present invention. FIGS. 1 to 3 show a first embodiment, FIG. 1 is a front sectional view, FIG. Is a plan view, FIG. 3 is a right side view, FIG. 4 is a front sectional view of the second embodiment, and FIG. 5 is a plan view. 1 gas burner section 12 mixture air storage chamber 14 secondary air storage chamber 2 control section 31 air inlet 321 air chamber 322 air mixture chamber 54 raw gas chamber 6 … Actuating rod A… Air flow control valve G… Raw gas flow control valve

Claims (1)

(57) [Claims] A control section having an air chamber, a raw gas chamber, and an air-fuel mixture chamber; and a gas burner section having a secondary air storage chamber and an air-fuel mixture storage chamber. The air chamber is communicated with the secondary air storage chamber of the gas burner section, the air-fuel mixture chamber is communicated with the air-fuel mixture storage chamber of the gas burner section, and the control rod is movable forward and backward with the control section. A raw gas amount control valve and a primary air amount control valve which are installed and increase or decrease the opening according to the advance and retreat of the operating rod are provided, and the operating valve is operated by appropriately moving the operating rod forward and backward by an actuator. A ratio control valve device for a gas burner for adjusting an amount of primary air flowing from the air chamber into the air-fuel mixture chamber and an amount of raw gas flowing from the raw gas chamber into the air-fuel mixture chamber.