JPH0972535A - Gas equipment provided with governor valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a gas equipment less susceptible to influences of a burner temperature and radiation heat by enlarging a spacing between a governor valve and the burner and reduce a degree of deflection of a fuel gas flow and pressure loss by forming a gas flow passage in a substantially simple V-shape. SOLUTION: A valve mechanism A comprises a main valve body 1 provided with a gas flow passage to a burner as well as a safety valve or a main valve, a heating power adjusting valve body 3 provided between the main valve body 1 and the burner and provided with a heating power adjusting valve which adjusts heating power of the burner between strong and weak, a governor valve 200 provided by connecting the main valve body 1 and the heating power adjusting valve body 3 to each other, an igniting and fire extinguisher mechanism 100, and an operating lever mechanism 500. The heating power adjusting valve body 3 is disposed between the governor valve 200 and the burner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas appliance having an improved mounting position of a governor valve.

[0002]

2. Description of the Related Art Combustion plate type burners are used in table stoves, gas ovens, gas heaters and the like. In this combustion plate type burner, unstable combustion is likely to occur such that the flame lifts or is sucked into the flame hole due to the pressure fluctuation of the fuel gas. Therefore, a governor valve for damping the pressure fluctuation of the fuel gas is attached to the valve mechanism that controls the supply of the fuel gas.

The valve mechanism of a gas device has a main valve body having a gas flow passage inside, and an opening / closing valve for the gas flow passage is mounted on the main valve body. As the on-off valve, a main valve and a safety valve for closing the gas supply by closing when an abnormality such as a misfire occurs are used. A thermal power adjustment valve body having a thermal power adjustment valve for adjusting the thermal power of the burner from a high thermal power to a low thermal power is connected downstream of the main valve body. A needle valve that is rotated by a heat power adjusting lever and whose valve opening degree increases and decreases is often used as the heat power adjusting valve.

A governor valve for damping the pressure fluctuation of the fuel gas and adjusting the flow velocity of the gas is interposed between the main valve body and the heat control valve body. Since the governor valve has a rubber diaphragm inside, the governor valve is liable to deteriorate in durability and malfunction when it receives heat from the burner.

[0005]

In the conventional gas equipment,
Since the governor valve is mounted close to the burner, it has a drawback that it is easily affected by the temperature of the burner. In addition, the gas passage is complicated and the pressure loss is large.

An object of the present invention is to increase the distance between the governor valve and the burner to make it less susceptible to the temperature of the burner. The object of the invention described in claim 2 or claim 3 is to improve the operability by arranging the point / fire extinguishing operation part and the heat-power adjusting lever for adjusting the heat power vertically close to each other, and to improve the operability of It is to absorb the pressure fluctuation by making the secondary pressure fluctuation of the pressure as small as possible.

[0007]

SUMMARY OF THE INVENTION The present invention comprises a burner,
Between a main valve body provided with a gas passage for supplying combustion gas to the burner and provided with an on-off valve for the gas passage, and between an outlet of the main valve body and an inlet of the burner. And a thermal power regulating valve body provided with a thermal power regulating valve for regulating the thermal power of the burner, and connecting the outlet of the main valve body and the inlet of the thermal power regulating valve body. In a gas device including a valve mechanism having a provided governor valve, the governor valve is mounted such that the thermal power control valve body is arranged between the governor valve and the burner.

A gas appliance according to a second aspect is a burner,
A main valve body provided with a gas flow passage for supplying combustion gas to the burner and provided with a safety valve or a main valve for opening and closing the gas flow passage, an outlet of the main valve body and suction of the burner Of the main valve body, which is interposed between the mouth and the heat control valve body provided with a heat control valve for adjusting the heat of the burner from strong to weak by rotating the valve body. A governor valve provided by connecting an outflow port and an inflow port of the thermal power control valve body, a point / fire extinguishing mechanism for opening and closing the safety valve or the main valve, and the thermal power control valve by rotating the valve body. And a thermal power adjustment lever mechanism for increasing / decreasing the valve opening degree.

A gas appliance according to a third aspect of the present invention is characterized in that the burner is a grill burner mounted on a grill of a table stove. The gas equipment according to claim 4,
The main valve body is arranged in the front and rear direction inside the housing of the table hob, a fuel gas inflow port is provided in the rear part, and an outflow port is formed in the upper surface of the front part, and the governor valve is a governor valve body. Is fastened to a front portion of the main valve body, a governor inlet opening downward is connected to the outlet, and a governor outlet is formed rearward, and the thermal power control valve body is the governor valve body. Is disposed at the rear of the main valve body and above the rear portion of the main valve body, and the front portion has an inlet connected to the governor outlet.

[0010]

According to the present invention, since the heat regulating valve body is arranged between the governor valve and the burner,
A large gap between the governor valve and the burner allows the governor valve to be less susceptible to burner temperature and radiant heat.

According to the second or third aspect of the invention, the operation can be arranged within a narrow range, so that the operability is excellent. In the configuration according to claim 4, the gas flow path in the valve mechanism is formed by a simple V-shape.
It can be shaped like a letter. For this reason, the degree of diversion of the fuel gas flow in the gas flow path is small, pressure loss can be reduced, and the stability of the combustion flame is secured against fluctuations in gas pressure at low pressure, resulting in high safety.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 3 show a valve mechanism A for a grill burner provided on a table stove T as a gas appliance. The valve mechanism A includes a point / fire extinguishing mechanism 100 and a governor valve 20.
0, and has a heat power increase / decrease mechanism 300. This valve mechanism A
Is a combustion plate type upper grill burner G1 installed at the right end inside the table stove T shown in FIG. 4 and installed on the ceiling in the grill cabinet 400 shown in FIG. 5, and the grill cabinet 400.
It controls the supply of fuel gas to the lower grill burner G2, which consists of a pair of pipe burners attached to the lower part of both sides inside.
The heat power adjusting mechanism 300 is manually operated by the heat power adjusting lever mechanism 500.

The table stove T is provided with stove burners B1 and B2 on the left and right of the upper surface of the housing H, and a grill cabinet 400 is arranged between the stove burners B1 and B2. The front surface of the housing H is an operation surface, and the point / fire extinguishing mechanism 100
To operate the upper grill burner G1 and the lower grill burner G
Point / fire extinguishing button 101 for igniting or extinguishing 2
However, it is urged forward by a spring (not shown) and is swingably attached in the front-rear direction.

Above the point / fire extinguishing button 101 on the operation surface, slide type operation knobs 301 and 302 for operating the heat power adjusting lever mechanism 500 are provided so as to be slidable in the left and right directions. As for the slide positions of the slide type operation knobs 301 and 302, in FIG. 4, the right end is extinguishing, the middle part is weak heat power, and the left end is strong heat power.

As shown in FIG. 3, the point / fire extinguishing mechanism 100 is
A safety valve S and a main valve M are provided inside and a cylindrical main valve body 1 horizontally mounted in the front-rear direction is provided. The governor valve body 2 of the governor valve 200 is fastened to the upper surface of the front part (left part in the figure) of the main valve body 1. On the upper surface of the rear part (right part in the figure) of the main valve body 1,
The heat adjustment valve body 3 of the heat increase / decrease mechanism 300 is fastened.

A switch mechanism 4 actuated by a point / fire button 101 is fastened to the front end surface of the valve body 1. The switch mechanism 4 includes a switch frame 41 fastened to the front end surface of the main valve body 1 with a screw, and a switch body 4 fitted in the switch frame 41 so as to be movable back and forth.
2 and.

The switch body 42 is urged forward (leftward in the drawing) by a spring 43, and when pushed in from the projecting position (fire extinguishing position), the switch body 42 is pushed in (ignition position).
Reach When the push-in is released in this state, it is locked at the intermediate position (combustion position) by the push / push mechanism 44 by the heart cam or the modified heart cam, and when pushed in again from the intermediate position, it returns to the original protruding position (fire extinguishing position).

As shown in FIG. 3, the shaft valve 11 of the main valve body 1 is fitted with the electromagnet 12 of the safety valve S at the rear portion (right portion in the drawing), and the inside thereof forms a gas flow passage 13 for fuel gas.
An inflow port 14 that opens downward is provided at the rear part (left part in the drawing) of the main valve body 1, and an outflow port 15 that opens upward and communicates with the governor valve body 2 is formed at the front part.

Inside the shaft hole 11, the tip of the switch main body 42
The valve shaft rod 5 that is in contact with the tip (right end in the figure) of the valve is inserted movably back and forth. The valve shaft 5 is biased forward by the spring 51, and is displaced in the front-back direction in conjunction with the switch body 42 that is operated by operating the point / fire extinguishing button 101, and has the action of opening and closing the gas flow path 13. .

The portion of the gas flow path 13 where the outlet 15 is provided is formed with a small diameter to form a valve opening 16, and the valve stem 5
A main valve M is formed with a collar-shaped main valve body 52 which is externally fitted to the spring 51 and has a spring 51 installed back. A throttle wall 54 is formed between the main valve M and the inflow port 14, and the safety valve S
It becomes the valve opening 55 of. A collar-shaped safety valve body 56 of the safety valve S is externally fitted together with the safety valve spring on the rear portion of the valve shaft 5, and closes the valve port 55 when the valve shaft 5 is located on the front side (left side in the drawing).

The governor valve body 2 is composed of a front portion 2A in which a rubber diaphragm 21 is housed and a rear portion 2B in which a gas flow path communicating with the thermal power control valve body 3 is provided.
The front part 2A opens downward and the outlet 1 of the main valve body 1
5, a governor inflow port 22, a dish-shaped diaphragm chamber 23 opened upward, and a governor valve port 24 provided in a partition wall between the governor inflow port 22 and the diaphragm chamber 23.
Having.

In the rear portion 2B, there are provided an intermediate vertical passage 25 extending downward from the diaphragm chamber 23, and a governor outlet 26 communicating with the vertical passage 25 and having a cross-sectional area gradually increasing toward the rear. Has been. The diaphragm chamber 23 is covered with a cap 27 made of sheet metal, and the diaphragm 2
The outer periphery of No. 1 is sandwiched between the edge of the diaphragm chamber 23 and the edge of the cap 27.

A valve body holding member 28 is attached to the center of the diaphragm 21, and a biasing force adjusting screw mechanism 29 provided on the upper surface of the holding member 28 and the ceiling of the cap 27.
An adjusting spring 2S is interposed between the and. A governor valve body 20 for adjusting the opening degree of the governor valve port 24 is provided on the valve body holding member 28 so as to project downward.
The governor valve body 20 has a large-diameter portion at the tip, and the governor outlet 26
When the gas pressure applied to the lower surface of the diaphragm 21 increases, it is displaced upward to reduce the valve opening.

The thermal power control valve body 3 has a front portion having two vertical cylinder portions 3B and 3A on the left and right sides, and two horizontal tubular outlets 3D on the left and right sides to the upper grill burner G1 and the lower grill burner G2.
Consists of a rear part with 3C. At the upper ends of the vertical cylindrical portions 3A and 3B, a right heat power adjusting valve 30 and a left heat power adjusting valve 40 for adjusting the heat power of the upper grill burner G1 and the lower grill burner G2 are provided.

A link lever mechanism 45 for increasing or decreasing the valve opening of the heat power adjusting valves 30, 40 is attached to the upper end surface of the heat power adjusting valve body 3. Link lever mechanism 4
Reference numeral 5 has a left link lever 4B and a right link lever 4A, and is freely rotatable by a single fulcrum 32 provided on the upper wall surface of the bottomless box-shaped bracket 31 fastened to the upper end surface of the thermal power control valve body 3. It is supported.

The right link lever 4A extends toward the right side of the fulcrum 32 and has a working arm 46 serving as a fork portion in which a tip is bent downward and a cut groove is formed, and the fulcrum 32.
And a driven arm 47 which is a fork portion which is extended in the front direction and whose tip is bent downward in an L shape to form a cut groove.

The left link lever 4B is the right link lever 4
A working arm 48, which is superposed on A, extends to the left side of the fulcrum 32 and has a tip bent downward to form a notch groove, and extends in the front direction of the fulcrum 32, It has a driven arm 49 which is a fork portion having a notched groove at its tip.

As shown in FIG. 3, the left and right vertical cylindrical portions 3B, 3A.
Is provided with a common inlet 3I connected to the rear end (the tip of the outlet 26) of the governor valve body 2 on the lower front surface, and a horizontal extension extending rearward from each vertical cylindrical portion 3A, 3B on the rear surface of the intermediate portion. The cylindrical outlets 3C and 3D are arranged in parallel. As shown in FIG. 2, the right vertical cylinder portion 3A and the left vertical cylinder portion 3B have a valve body 3a of the right thermal power control valve 30 and a valve body 3b of the left thermal power control valve 40 that are rotatable and vertically movable at their upper ends. It is fitted.

Each of the valve bodies 3a and 3b has a columnar shape, and the upper end thereof is exposed at the upper portion of the vertical cylindrical portions 3A and 3B and is fitted into the right vertical cylindrical portion 3A and the left vertical cylindrical portion 3B. A right needle pin 33 and a left needle pin 34 for rotating the valve bodies 3a and 3b to increase / decrease the valve opening are attached to the portion in the orthogonal direction.

Right needle pin 33, left needle pin 34
Through the right side inclined slit 35 and the left side inclined slit 36, which extend laterally from the upper ends of the vertical cylindrical portions 3A and 3B of the thermal power regulating valve body 3 and are provided on the right and left side walls of the box-shaped bracket 31, and act as cam grooves. Overhangs. The tip portions of the needle pins 33 and 34 are engaged with the fork portions of the working arms 46 and 48.

The right slanted slit 35 and the left slanted slit 36 determine the rotation amount of the right needle pin 33 or the left needle pin 34 driven by the right link lever 4A or the left link lever 4B in the axial direction of the valve bodies 3a, 3b. The valve opening degree of the thermal power control valves 30 and 40 is increased / decreased by converting into the movement amount.

When the right and left needle pins 33 and 34 are set to the upper ends (front ends), the valve opening of the heat power adjusting valves 30 and 40 becomes maximum, and the heat power of the upper grill burner G1 and the lower grill burner G2 becomes maximum. Needle pins 33, 3
When 4 is set to the lower end (front end), thermal power control valve 3
The valve openings of 0 and 40 are from the minimum to the valve closing, and the heat power of the upper grill burner G1 and the lower grill burner G2 is from the weakest to the extinction.

On the upper part of the governor valve body 2, three fastening seats 18 each having a screw hole are provided so as to project upward, and a fire power adjusting lever mechanism 500 is fastened. The heating power adjusting lever mechanism 500 is rotatably mounted on the lever base plate 6, the upper surface of the lever base plate 6 by a fulcrum 61, and the upper heating power adjustment lever 6A for adjusting the heating power of the upper grill burner G1 and the lever base plate 6 are provided. It is rotatably attached to the lower surface by a fulcrum 61 and has a lower heating power adjusting lever 6B for adjusting the heating power of the lower grill burner G2.

The lever base plate 6 is fastened to the governor valve body 2 by screwing the three screws 17 into the screw holes of the fastening seat 18. The lever base plate 6 has a hole 62 formed in the center thereof through which the cap 27 of the governor valve 200 is inserted, and a lever guide 7 formed by bending an extension of the lever base plate 6 upward is provided at the front end. At the front ends of the upper heat power adjusting lever 6A and the lower heat power adjusting lever 6B,
The slide type operation knobs 301 and 302 are fixed.

The upper heat power adjusting lever 6A and the lower heat power adjusting lever 6B have pawls 63 and 64 formed at the rear end of the fulcrum 61 by bending the tip extensions upward, and the driven arms 47 of the link levers 4A and 4B, respectively. , 49 in the front end notches. In front of the fulcrum 61 of the upper heat power adjusting lever 6A and the lower heat power adjusting lever 6B, a left curved portion 65 (see FIGS. 1 and 6) and a right curved portion for bypassing (avoiding) the cap 27 of the governor valve 200. 66 (see FIGS. 7 to 11) are formed in the left-right direction, respectively.

A cam mechanism 8 for applying an operating force to the lower heat power adjusting lever 6B is provided on the upper surface of the right end of the lever base plate 6.
(See FIGS. 7 to 11) are provided. Lever board 6
A cam mechanism 9 (see FIG. 6) for applying an operating force to the upper heat power adjusting lever 6A is provided on the lower surface of the left front end of the.

The cam mechanism 8 comprises a lower lever pin 8 which is erected upward from the right side of the fulcrum 61 of the lower heat power adjusting lever 6B.
1, a pin insertion hole 67 formed in the lever substrate 6, and a cam plate 82. The cam plate 82 is rotatably attached to a cam plate fulcrum 83 provided at the right end of the lever substrate 6.

The right edge of the cam plate 82 is a cam edge 84, and the lever board 6 is inserted through the insertion hole 67 in the cam edge 84.
It is in sliding contact with the lower lever pin 81 protruding above. A torsion spring 85 supported by a cam plate fulcrum 83 is attached between the lever base plate 6 and the cam plate 82, and biases the cam plate 82 in the leftward rotation direction.

The cam mechanism 9 has a symmetrical structure with the cam mechanism 8 and projects from the left side of the fulcrum 61 of the upper heat-power adjusting lever 6A to the lower side of the lever board 6 by bypassing the left edge of the lever board 6. The upper lever pin 91 and the cam plate 92 are provided. The cam plate 92 is used by turning over the same parts as the cam plate 82, and is rotatably attached to a cam plate fulcrum 93 provided at the left front end of the lever substrate 6.

The left side edge of the cam plate 92 is a cam edge 94, and the cam edge 94 is in sliding contact with the upper lever pin 91 protruding below the lever substrate 6. A torsion spring 95, which is the same as the torsion spring 85 supported by the cam plate fulcrum 93, is attached between the lever base plate 6 and the cam plate 92.
The cam plate 92 is biased in the clockwise direction.

These cam mechanisms 9 and 8 give a predetermined operation force when the upper heat power adjusting lever 6A or the lower heat power adjusting lever 6B is slid between the high heat power and the low heat power.
Further, when operating from the low heat position to the fire extinguishing position, a larger operation force is required, and when the upper heat adjusting lever 6A or the lower heat adjusting lever 6B is released during the fire extinguishing operation, A springback function that automatically returns to low heat is added. Further, a large discontinuity 89 is formed in the middle of the cam edge 84 between the low heat position and the fire extinguishing position, but a large discontinuity 89 is formed. It is automatically put in the fire extinguishing position by the function.

The lever guide 7 is substantially H-shaped as shown in FIG.
It has a V-shaped front shape, and laterally long slits 72 and 73 are formed above and below the horizontal member 71 so that the tips of the upper heat power adjusting lever 6A and the lower heat power adjusting lever 6B can slide. Both ends of the slits 72 and 73 serve as stoppers at the tips of the upper heat power adjusting lever 6A and the lower heat power adjusting lever 6B. It is a strength member, and there is an advantage that a strong stopper can be formed by extending the lever board 6 having a large plate thickness to form a stopper.

At the right end of the lateral member 71, a rotary plate 74 having a substantially isosceles triangle whose apex angle portion is an arc is rotatably mounted at a fulcrum 75. As shown in (a) of FIG. 12, the rotation range of the rotation plate 74 is limited by the projections 7A and 7B provided on the lateral member 71. Therefore, when either one of the upper heat power adjusting lever 6A and the lower heat power adjusting lever 6B is set to the fire extinguishing position, even if an operation is performed to put the other one into the fire extinguishing position, (B) in FIG. As shown, it cannot be put into the fire extinguishing position.

That is, the rotating plate 74 and the projections 7A, 7
B is an upper heat power adjusting lever 6A and a lower heat power adjusting lever 6
It constitutes an alternative mechanism 70 for preventing both Bs from being simultaneously put in the fire extinguishing position. As a result, at least one of the upper grill burner G1 and the lower grill burner G2 is burned while the grill is in use.

Next, the operation of this gas equipment will be described. When the ignition / fire extinguishing button 101 is pressed during ignition, the switch body 42 is pushed in. At this time, the valve shaft 5 is pushed in, the main valve M and the safety valve S are opened, and the fuel gas is supplied from the thermal power adjusting mechanism 300 to the upper grill burner G1 or the lower grill burner G2 through the governor valve 200. In synchronization with this, ignition is performed by an ignition device (not shown).

When the lower grill burner G2 during combustion is extinguished while the grill cabinet 400 is in use, the gas pressure in the gas passage 13 temporarily increases. At this time, the diaphragm 21 of the governor valve 200 is displaced upward to reduce the valve opening. Further, when the lower grill burner G2 is extinguished during fire extinguishing, the gas pressure in the gas passage is temporarily reduced. At this time, the diaphragm 21
Moves downward and increases the valve opening. As a result, the pressure fluctuation of the fuel gas is instantly reduced, and stable combustion is always obtained in the lower grill burner G2.

FIG. 6 shows the connected state of the upper heat power adjusting lever 6A and the left link lever 4B which are set to the position of the low heat power. FIGS. 7 to 11 show the connection states of the lower heat power adjusting lever 6B and the right link lever 4A that are set to the strong heat power to the weak heat power, the springback position to the weak position, and the fire extinguishing position, respectively.

In this embodiment, the governor valve 200 is located on the front side of the heat regulation valve body 3 and is not easily affected by the heat of the stove burner B2. Therefore, deterioration of the rubber diaphragm 21 due to heat can be prevented and durability can be improved.

The gas flow passages in the main valve body 1, the governor valve body 2, and the thermal power control valve body 3 are substantially V-shaped in substantially the same vertical plane, and the pressure loss due to the turning of the fuel gas flow is small. It has few simple shapes.

[Brief description of drawings]

FIG. 1 is a perspective view of a valve mechanism of a table stove grill burner.

FIG. 2 is a perspective view of a valve mechanism in which a heating power adjusting lever mechanism and a link lever mechanism are removed.

FIG. 3 is a cross-sectional view of a valve mechanism of a table stove grill burner.

FIG. 4 is a perspective view of a table stove.

FIG. 5 is a schematic configuration diagram of a grill burner and a valve mechanism.

FIG. 6 is a plan view of the valve mechanism of the grill burner.

FIG. 7 is a plan view of the valve mechanism of the grill burner.

FIG. 8 is a plan view of the valve mechanism of the grill burner.

FIG. 9 is a plan view of the valve mechanism of the grill burner.

FIG. 10 is a plan view of the valve mechanism of the grill burner.

FIG. 11 is a plan view of the valve mechanism of the grill burner.

FIG. 12 is a front view of a guide panel.

[Explanation of symbols]

 1 Main Valve Body 2 Governor Valve Body 3 Thermal Power Control Valve Body 13 Gas Flow Path 14 Inlet 15 Outlet 20 Governor Valve Body 22 Governor Inlet 26 Governor Outlet 30 Left Thermal Power Adjusting Valve 40 Right Thermal Power Adjusting Valve 100 Points / Extinguishing Mechanism 200 Governor valve 300 Thermal power increase / decrease mechanism 500 Thermal power adjustment lever mechanism A Grill burner valve mechanism B1, B2 Stove burner G1 Upper grill burner G2 Lower grill burner M Main valve S Safety valve

Claims (4)

[Claims] 1. A main valve body provided with a burner, a gas flow passage for supplying combustion gas to the burner, and an opening / closing valve for the gas flow passage, and an outlet of the main valve body. A heat control valve body provided between the suction port of the burner and a heat control valve for adjusting the heat of the burner, an outlet of the main valve body, and the heat control valve body. In a gas device comprising a valve mechanism having a governor valve connected to the inlet of the governor valve, the governor valve is mounted so that the thermal power control valve body is arranged between the governor valve and the burner. Gas equipment characterized by having done. 2. The gas equipment according to claim 1, wherein a burner and a gas flow passage for supplying combustion gas to the burner are provided, and a safety valve or a main valve for opening and closing the gas flow passage is provided. And a main valve body, which is interposed between the outlet of the main valve body and the suction port of the burner, and for adjusting the heating power of the burner from strong to weak by rotating the valve body. A thermal power control valve body provided with a thermal power control valve, a governor valve provided by connecting an outlet of the main valve body and an inlet of the thermal power control valve body, and opening or closing the safety valve or the main valve. A gas appliance comprising: a point / fire extinguishing mechanism and a heat power adjusting lever mechanism for rotating the valve body to increase or decrease the valve opening of the heat power adjusting valve. 3. The gas appliance according to claim 2, wherein the burner is a grill burner mounted on a grill of a table stove. 4. The main valve body according to claim 3, wherein the main valve body is arranged in a front-rear direction in a housing of the table hob, a fuel gas inlet is provided in a rear portion, and an outlet is formed in an upper surface of a front portion. The governor valve has a governor valve body fastened to a front portion of the main valve body, a governor inlet opening downwardly connected to the outlet, and a governor outlet formed rearward, The thermal power control valve body is disposed behind the governor valve body and above the rear portion of the main valve body, and has a front inlet having an inlet connected to the governor outlet.