TW202200938A - Gas stove - Google Patents

Abstract

[Subject] A gas furnace, which is connected to the gas supply path to the furnace core, is provided with a manual thermal power regulating valve (74) and an electric thermal power regulating valve (73), and is provided with a linkage mechanism, and the linkage mechanism is connected to During the ignition operation by the operating member (75), the manual heat control valve (74) is set to a specific ignition heat position between the minimum heat position and the maximum heat position, and it is configured so as to be slightly different from the ignition operation. At the same time, the manual heating power control valve (74) is operated to switch from the ignition heating power position to the maximum heating power position, and the heating power of the hearth does not increase. [Solution] At the time of ignition operation, set the electric heating power control valve (73) to a specific intermediate heating power position between the minimum heating power position and the maximum heating power position. This intermediate heating power position is set so that even if the manual heating power control valve (74) is operated from the ignition heating power position to the maximum heating power position side, the heating power to the furnace core becomes higher than that obtained at the ignition heating power position. The firepower and the larger situation are used as the position of suppression.

Description

Gas stove

The present invention relates to a gas furnace, which is provided with: a furnace core for heating a conditioning container placed on a furnace frame on a top plate; and a manual operation member for performing ignition operation and extinguishing of the furnace core operation; and a manual heat control valve, which is interposed at the gas supply path for the furnace core and is manually operated; and an electric heat control valve, which is connected in series with the manual heat control valve at the gas supply path Set up as an intermediary and driven by a motor.

In the prior art, as such a gas furnace, there is known a configuration in which a manual heat control valve is set to a specific heat position during ignition operation by an operating member. Interlocking mechanism (for example, refer to Patent Document 1). Here, in the configuration described in Patent Document 1, the above-mentioned specific heating power position is set at the maximum heating power position. However, in such a configuration, when igniting, the flame that emerges from the bottom surface of the conditioning container to the outside may overflow, which may frighten the user.

Therefore, in the prior art, it is also well known that there are the following constitutions: that is, the above-mentioned specific thermal power position is set as the ignition thermal power position between the minimum thermal power position and the maximum thermal power position, and the thermal power of the furnace core is set as the ignition thermal power position between the minimum thermal power position and the maximum thermal power position It is a medium fire level, and it suppresses flame overflow at the time of ignition (for example, refer patent document 2). However, depending on the user's operation, there may be cases in which the manual heat control valve is switched from the ignition heat position to the maximum heat position at the same time as the ignition operation by the operating member to start the adjustment with high heat. situation. In this case, it becomes impossible to suppress flame overflow at the time of ignition. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Application Laid-Open No. 11-108344 [Patent Document 2] Japanese Patent Application Laid-Open No. 8-312955

[Problems to be solved by the invention]

In view of the above-mentioned problems, the present invention aims to provide a gas stove which can more reliably suppress flame overflow during ignition. [means to solve the problem]

In order to solve the above-mentioned problems, the present invention is directed to a gas furnace comprising: a furnace core for heating a conditioning vessel placed on a furnace frame on a top plate; and a manual operation member for performing a heating operation of the furnace core Ignition operation and flameout operation; and a manual heat control valve, which is interposed at the gas supply path for the furnace core and is manually operated; and an electric heat control valve, which is connected to the manual heat control valve at the gas supply path The regulating valve is interposed in series and driven by a motor. The gas furnace is provided with a linkage mechanism. It is a specific ignition thermal power position between the minimum thermal power position and the maximum thermal power position. During the ignition operation by the operating member, the electric thermal power control valve is configured to be set to the specific ignition thermal power position between the minimum thermal power position and the maximum thermal power position. The intermediate heating position is set so that even if the manual heating control valve is operated from the ignition heating position to the maximum heating position side, the heating power to the furnace core becomes higher than that at the ignition heating position. The obtained firepower and the greater situation are the position of suppression.

According to the present invention, even if the manual heat control valve is switched from the ignition heat position to the maximum heat position at the same time as the ignition operation by the operating member, the electric heat control valve is also operated by the electric heat control valve during the ignition operation. Since the system becomes the intermediate heating power position, it can be suppressed that the heating power of the core becomes larger than the heating power obtained at the ignition heating power position. As a result, the flame overflow at the time of ignition can be suppressed more reliably.

Furthermore, in the present invention, in order to prevent the ignition of the furnace core in the state where there is no conditioning container on the hob, it is preferable to provide a conditioning container detection means for detecting the presence or absence of the conditioning container on the oven rack, When it is detected by the conditioning container detection means that there is no conditioning container during the ignition operation caused by the operating member, the electric heat control valve is set to the fully closed state, and the furnace core is set to the fully closed state. Gas supply stopped. Furthermore, it is conceivable to switch the electric heat control valve to a specific standby position and to stand by until the next ignition operation when the ignition is turned off by the operating member. In this case, if the standby position is set to the intermediate heating position, it is not necessary to drive the electric heating control valve during the ignition operation. However, in this way, when it is detected that the conditioning container does not exist during the ignition operation, it becomes necessary to switch the electric heat control valve from the intermediate heat position to the fully closed state. During the time, the system will release gas.

On the other hand, if the above-mentioned standby position is preset to the fully closed state or a position close to the fully closed state, when it is detected that there is no conditioning container during the ignition operation, the electric It is advantageous that the heat control valve is immediately fully closed to prevent the release of gas. In addition, in this configuration, when the presence of the conditioning container is detected by the conditioning container detection means during the ignition operation, it is only necessary to move the electric heat control valve from the fully closed state or the vicinity of the fully closed state. The standby position can be switched to the intermediate fire position.

Furthermore, in the present invention, preferably, when the ignition of the furnace core is detected by the flame detection element provided at the furnace core after the ignition operation by the operating member, the electric The thermal power adjustment valve is switched from the intermediate thermal power position to the maximum thermal power position. According to this, after detecting the ignition of the furnace core, the heating power of the furnace core can be increased to the maximum heating power by the manual heating power regulating valve instead of being regulated by the electric heating power regulating valve.

In addition, during the ignition operation by the operating member, the electric heating power control valve can be set to a specific ignition power position between the minimum heating power position and the maximum heating power position, and the flame overflow during ignition can be suppressed. In this case, when the ignition operation is performed by the operating member, the manual heat control valve is configured to be set to a specific heat position through the interlocking mechanism. In the state where the heating power control valve is set to the ignition heating power position, the heating power of the furnace core may not become smaller than the heating power which can be obtained at the ignition heating power position.

The gas stove according to the embodiment of the present invention shown in FIG. 1 is provided with a pair of left and right cores 3, 3 facing the left and right pair of burner openings (not shown), and the left and right pair burns The opening for the burner is opened at the top plate 2, and the top plate 2 covers the upper surface of the furnace body 1; on the top plate 2; and the grill 5, which is integrated into the furnace body 1. On the front panel 11 of the furnace body 1, there are provided: the left and right points for the hearth, the flameout keys 12, 12; Above the keys 12, 12, and can be freely shaken in the horizontal direction; and the point and flameout key 14 for the grill; ₁ , 15 ₂ , which are located at the point for the grill, above the flameout key 14, and can be freely shaken in the horizontal direction.

Referring to Fig. 2, the gas supply path 6 is divided into "a pair of gas supply paths 6a, 6a for supplying gas to the left and right furnace cores 3 and 3" and "for the upper fire burner of the grill 5". The gas supply path 6b for the grill for gas supply to the lower-fire burner 51 and 52". At each gas supply path 6a for the furnace core, a valve unit 7 for the furnace core is interposed, and the valve unit 7 for the furnace core is provided with an electromagnetic safety valve 71, a gas master valve 72, and an electric heating power. The regulating valve 73 and the manual heating regulating valve 74 interlocking with the heating regulating rod 13 are interposed at the gas supply path 6b for the grill, and the valve unit 8 for the grill is interposed. , is equipped with an electromagnetic safety valve 81, a gas master valve 82, a manual type upper-fire burner fire-power regulating valve 83 ₁ interlocking with the fire-power regulating rod 15-1 for the upper-fire burner ₅₁ , and a lower-fire burner The thermal power regulating valve 83 ₂ for the manual-type low-fire burner is interlocked with the thermal power regulating rod 15 ₂ for the burner 52 .

Hereinafter, referring to FIG. 3 , the valve unit 7 for the furnace core will be described in detail. In addition, the electromagnetic safety valve 81 of the valve unit 8 for grill, the gas master valve 82, and the manual heat control valves 83 ₁ and 83 ₂ serve as the electromagnetic safety valve 71 , the gas The main valve 72 and the manual heat control valve 74 have the same configuration, and the description thereof will be omitted.

The valve unit 7 for the furnace core is provided with a valve housing 70, and the valve housing 70 is provided with an inflow port 70a connected to the upstream side portion of the gas supply path 6a for the furnace core, and an inflow port 70a for being connected to the furnace core. The downstream portion of the gas supply path 6a serves as a connecting outflow port 70b. In this valve housing 70 , an electromagnetic safety valve 71 , a gas master valve 72 , an electric thermal control valve 73 , and a manual thermal control valve 74 are incorporated in this order from the upstream side.

The electromagnetic safety valve 71 includes a valve seat 711 , a valve body 712 that can seat on the valve seat 711 from the rear (leftward in FIG. 3 ) corresponding to the upstream side, and a valve body 712 via the valve body 712 . The armature 713 to which the valve shaft 712 a extending toward the rear is connected and the armature 713 abuts the armature 713 when the valve body 712 is displaced to a specific valve opening position separated from the valve seat 711 . The electromagnet 714 and the valve spring 715 for urging the valve body 712 toward the valve closing position (the position shown in FIG. 3 ) seated on the valve seat 711 . The gas main valve 72 is provided with a valve seat 721, a valve body 722 which can be seated on the valve seat 721 from the rear and is fixed to an operating rod 76 described later, and the valve body 722 is seated on the valve seat 721. The valve spring 723 is used as the urging valve spring 723 in the closed valve position (the position shown in FIG. 3 ).

In addition, the valve unit 7 is provided with a manual operating member 75 that is slidably supported in the front-rear direction at a guide block 751 attached to the front end of the valve housing 70 . The operating member 75 is pushed forward by the spring 752 and abuts against the back of the dot and flameout keys 12, and is moved from the flameout position (the position shown in FIG. 3 ) at the front end via the dot and flameout keys 12. ) has been pushed to the ignition position at the rear end. Furthermore, the operating member 75 is moved to the flame-out position and the ignition by the pressing mechanism 753 formed by the heart-shaped cam groove 753a and the engaging element 753b engaged with it, by releasing the pressing at the ignition position. It is locked at a specific burning position between the positions, and it returns to the flame-out position by releasing the pressing after the pressing operation at the burning position.

In addition, the operation lever 76 facing the rear of the operation member 75 is inserted into the valve housing 70 so as to be able to advance and retreat in the front-rear direction. When the operating member 75 is pressed from the flame-off position, the operating rod 76 is pressed by the operating member 75 and moves backward, and the valve body 722 of the gas master valve 72 fixed to the operating rod 76 is connected with the valve spring 723 The pushing forces counteract each other and separate from the valve seat 721, and the gas main valve 72 is opened. When the operating rod 76 moves further backward, the operating rod 76 comes into contact with the valve body 712 of the electromagnetic safety valve 71 , and the valve body 712 moves backward against the urging force of the valve spring 715 . Also, when the operating member 75 is pressed and operated to the ignition position, as shown in FIG. 4( a ), the valve body 712 is pressed and moved until the armature 713 and the electromagnet 714 come into contact with each other. At the valve opening position, the electromagnetic safety valve 71 is forced to open. Furthermore, if the operating member 75 is released by pressing at the ignition position, and the valve spring 723 and the urging force of the spring 752 are used to return to the combustion position, as shown in FIG. 4(b), the gas master valve 72 Although the valve is maintained in the open state, the rear end of the operating rod 76 is displaced further forward than the valve seat 711 of the electromagnetic safety valve 71, and the forced opening of the electromagnetic safety valve 71 is released. Furthermore, when the operating member 75 is released from the pressing operation after the pressing operation at the burning position, and the valve spring 723 and the urging force of the spring 752 are used to return the operating member 75 to the flame-off position, the gas master valve 72 is closed.

Referring to FIG. 5 , at the guide block 751, a micro switch 77 that detects the position of the operating member 75 is provided. The micro switch 77 is provided with the first and second contacts 771 and 772 . When the operating member 75 is present at the flameout position, as shown in FIG. 5( a ), both the first and second contacts 771 and 772 are turned OFF. When the operating member 75 is present at the burning position, as shown in FIG. 5( b ), it is pressed by the first cam portion 754 ₁ provided on the operating member 75 , and the first contact 771 is turned ON. When the operation member 75 is present at the ignition position, as shown in FIG. 5( c ), not only the first contact 771 but also the second cam portion 754 ₂ is pressed by the second cam portion 754 2 provided at the operation member 75 . The contact 772 is also turned ON.

The ON and OFF signals of the first and second contacts 771 and 772 are input to a controller other than the control means. The controller starts to energize the electromagnet 714 of the electromagnetic safety valve 71 when the operation member 75 reaches the combustion position and the first contact 771 is turned on by the pressing operation of the operation member 75 from the flame-out position . After that, when the operation member 75 reaches the ignition position and the second contact 772 is turned ON, spark ignition at the ignition electrode 31 attached to the core 3 is performed, and ignition is performed at the core 3 . After ignition, when the second contact 772 is turned OFF due to the return of the operating member 75 to the combustion position, the spark ignition at the ignition electrode 31 is terminated. On the other hand, until a predetermined waiting time elapses after the first contact 771 is turned on, the electromagnet 714 of the electromagnetic safety valve 71 is continuously energized, and the electromagnetic safety valve 71 is kept open. . During this waiting time, if the voltage of the thermocouple 32 attached to the furnace core 3 as a flame detection element rises to a certain level or higher, then the controller will continue to operate the electromagnet 714 after that. Electricity is turned on until the voltage generated by the thermocouple 32 due to the flameout of the furnace core 3 becomes lower than a predetermined level. When the first contact 771 is turned OFF by returning the operating member 75 to the flame-off position, the energization to the electromagnet 714 is stopped, and not only the gas main valve 72 but also the electromagnetic safety valve 71 is closed.

The manual heat control valve 74 is provided with a valve seat 741 on the upper part of the valve housing 70, and a needle valve body 742 which can approach the valve seat 741 from the front corresponding to the upstream side. The valve hole 741a is connected to the outflow port 70b. A pin 743 extending upward is fixed to a front end portion of the needle valve body 742 protruding outside the valve housing 70 . In addition, the thermal power adjustment lever 13 is pivotally supported so as to be able to swing freely in the lateral direction by the boss portion 701 protruding from the upper end surface of the valve housing 70 . Furthermore, the thermal power adjustment lever 13 is formed with an elongated cam hole 131 inclined in the lateral direction with respect to the front-rear direction. After that, the pin 743 is engaged with the cam hole 131 through the guide hole 702 a formed in the guide plate 702 fixed to the upper end of the valve housing 70 and the longitudinal direction is the long side. Thereby, the pin 743 (ie, the needle valve body 742 ) advances and retreats in the front-rear direction through the cam hole 131 by swinging the thermal control valve 13 in the lateral direction, and the thermal power of the furnace core 3 is adjusted.

Here, the needle valve body 742 is provided with a needle portion 742a that can be inserted into the valve hole 741a, a blocking portion 742b that can be seated on the valve seat 741, and the blocking portion 742b to be seated on the valve seat. The upstream side of the valve body 742 in the state on 741 is the restrictor hole 742c through which gas flows to the valve hole 741a. The blocking portion 742b is seated on the valve seat 741, and is the minimum heating power position of the manual heating power control valve 74, and the heating power of the core 3 becomes the minimum heating power prescribed by the restrictor hole 742c. In addition, the state in which the needle portion 742a is completely pulled out from the valve hole 741a is the maximum heat power position of the manual heat control valve 74 . If the manual thermal power regulating valve 74 is changed from the minimum thermal power position to the maximum thermal power position with the electric thermal power regulating valve 73 set to the maximum thermal power position described later, the thermal power of the furnace core 3 is as shown in FIG. 6 . changes in general.

In addition, in the ignition operation in which the operating member 75 is pressed and operated to the ignition position, the manual heat control valve 74 is set to a specific ignition heat position between the minimum heat position and the maximum heat position via the interlocking mechanism 78 ( position shown in Figure 3). The interlocking mechanism 78, as shown in FIG. 7, is operated by a pair of wings 781, 781 integrated with the fire power adjustment lever 13, and the wings 781, 781 are opposed to and operated from the front. A pair of claw portions 782 and 782 integrated with the member 75 is constituted. The pair of wing portions 781 and 781 are connected via a pivot portion 781a in the middle of the valve housing 70 supported so as to be swingable. When the heating power adjustment lever 13 exists at a swing position (hereinafter, referred to as the ignition swing position) corresponding to the ignition heating position, the wings 781 and 781 exist at the neutral position shown in FIG. 7 . When the operating member 75 is pressed and pushed all the way to the ignition position in a state where the thermal power adjustment lever 13 does not exist at the ignition rocking position, the wing portion 781 on one side abuts on the claw portion 782 on the one side , the wing portion 781 is pushed to move to the neutral position, and the fire power adjustment lever 13 is rocked to the ignition rocking position. Thereby, the manual heat control valve 74 becomes the ignition heat position.

The electric heat control valve 73 can be freely switched to a fully closed state in which the gas supply to the furnace core 3 is stopped. That is, the electric heat control valve 73 is pressed in the opening direction by the pressing means 734, and is configured to pass through the motion conversion mechanism 736 by the motor 735 formed by the stepping motor or the like. The driven linear member 737″ is switched to the fully closed state against the pressing force of the pressing means 734. Referring to FIG. 8 and describing it in more detail, the electric heat control valve 73 is provided with a valve seat 731, and can be freely oriented in the “close direction approaching the valve seat 731 (rightward in FIG. 8)” and “from the valve seat 731”. The main valve body 732 that moves in the opening direction (the left side of FIG. 8 ) when the valve seat 731 is separated, and the auxiliary valve body that abuts against the direct-acting member 737 opposite to the main valve body 732 in the opening direction 733. The main valve body 732 is provided with a needle portion 732a that can be inserted into a valve hole 731a opened in the valve seat 731, a blocking portion 732b made of an elastic material that can be seated on the valve seat 731, and even when the valve seat 731 is used. Even when the blocking portion 732b is seated on the valve seat 731, the restrictor hole 732c through which gas flows from the upstream side of the main valve body 732 to the downstream side, and the restrictor hole 732c that can seat the sub valve body 733 and open the restrictor hole The secondary valve seat 732d of 732c. A gasket 733a made of an elastic material opposed to the sub valve seat 732d is attached to the sub valve body 733 in order to improve the sealing performance in a state of being seated on the sub valve seat 732d.

The pressing means 734 includes the first pressing means 734a for pressing the main valve body 732 in the opening direction, and the sub-valve body 733 relative to the main valve body 732 by the first pressing means 734a more than the first pressing means 734a. The 2nd pressing means 734b which presses in the opening direction with a strong force is comprised. Moreover, it is equipped with the stopper means 738 which restrains the movement in the opening direction of the sub valve body 733 with respect to the main valve body 732 at a fixed position. The blocking means 738 is formed by a window hole 738a formed in the cylindrical portion 732e of the main valve body 732 surrounding the sub-valve body 733, and by protruding from the outer peripheral surface of the sub-valve body 733 with a sufficient clearance. The claw portion 738b inserted into the window hole 738a is formed. After that, when the claw portion 738b is engaged with the end edge of the window hole 738a in the opening direction, the sub valve body 733 does not move further in the opening direction relative to the main valve body 732 .

The motion conversion mechanism 736 is constituted by a feeding screw mechanism composed of a male screw 736a connected to the output shaft 735a of the motor 735 and a screw for screwing the male screw 736a. It is formed by the sliding element 736b that is blocked by the rotation. The sliding element 736b is in contact with a diaphragm 737a that hermetically seals the disposition portion of the motion converting mechanism 736 . After that, the linear motion member 737 is connected to this diaphragm 737a.

As shown in FIG. 8 , the blocking portion 732b of the main valve body 732 is seated on the valve seat 731 and the sub-valve body 733 is seated on the sub-valve seat 732d of the main valve body 732 to block the restrictor hole 732c In this state, the electric heat regulating valve 73 is in a fully closed state, and the gas supply to the furnace core 3 is stopped. From this fully closed state, if the motor 735 moves the linear motion member 737 in the opening direction via the motion conversion mechanism 736, the sub valve body 733 follows the linear motion by the pressing force of the second pressing means 734b. The member 737 moves toward the opening direction. The movement of the main valve body 732 in the opening direction is prevented by the pressing force of the second pressing means 734b until the movement of the auxiliary valve body 733 relative to the main valve body 732 in the opening direction is stopped by the blocking means 738. The blocking portion 732b of the main valve body 732 is prevented from being seated on the valve seat 731, and the sub-valve body 733 is separated from the sub-valve seat 732d, and the restrictor hole 732c is opened. Thereby, the electric heating power control valve 73 becomes the minimum heating power position which sets the heating power of the core 3 to the minimum heating power prescribed by the restrictor hole 732c. After the movement of the sub-valve body 733 in the opening direction relative to the main valve body 732 is stopped by the blocking means 738 , if the sub-valve body 733 is further moved in the opening direction, the main valve body 732 is blocked by the first The pressing force of the pressing means 734a moves in the opening direction following the sub-valve body 733, the blocking portion 732b of the main valve body 732 is separated from the valve seat 731, and the heating power of the furnace core 3 increases. In addition, the state in which the needle portion 732a of the main valve body 732 is completely pulled out from the valve hole 731a is the maximum heat power position of the electric heat control valve 73 . If the electric heating power regulating valve 73 is changed from the fully closed state to the maximum heating power position with the manual heating power regulating valve 74 set to the maximum heating power position, the heating power of the core 3 is as shown in FIG. 9 . generally vary.

At the furnace core 3, a pot bottom temperature sensor 33 abutting against the bottom surface of the conditioning container on the furnace frame 4 is attached. However, when the controller is selected to have the conditioning in the temperature adjustment mode, the electric heat regulating valve 73 is used to adjust the temperature detected by the pot bottom temperature sensor 33 to a specific set temperature. The heating power of the furnace core 3 can be adjusted between the minimum heating power and the maximum heating power.

Moreover, the gas stove of this embodiment is equipped with the conditioning container detection means 9 which detects the presence or absence of the conditioning container on the oven rack 4. Specifically, the temperature sensor 33 at the bottom of the pot is used to form the detection means 9 of the conditioning container. Here, the pan bottom temperature sensor 33 is supported so as to be able to rise and fall freely. Therefore, as shown in FIG. 10, a micro switch 91 that cooperates with a dog 92 installed at the member that lifts and lowers together with the pot bottom temperature sensor 33 is provided, and by these The micro switch 91 and the actuating tool 92 constitute the conditioning container detection means 9 . When there is no conditioning container on the hob 4, as shown in FIG. 10(a), the pot bottom temperature sensor 33 is raised, and the micro switch 91 is turned OFF. When there is a conditioning container on the hob 4 In the case of container P, as shown in FIG. 10( b ), the pan bottom temperature sensor 33 is lowered, and the micro switch 91 is pressed by the actuator 92 and turned ON.

Here, in order to ensure safety, it is necessary to prevent the hearth 3 from igniting in a state where there is no conditioning container on the hob 4 . Therefore, during the ignition operation by the operating member 75, when the absence of the conditioning container is detected by the conditioning container detection means 9, the spark ignition at the ignition electrode 31 is stopped, and Furthermore, the electric heat control valve 73 is switched to the fully closed state, so that gas is not released from the furnace core 3 .

Also, during the ignition operation by the operating member 75, the manual heat control valve 74 is set to a specific ignition heat position between the minimum heat position and the maximum heat position by the interlocking mechanism 78 as described above, As a result, the flame does not overflow from the bottom surface of the conditioning container to the outside when the flame is ignited. However, depending on the user's operation, there may be cases in which the manual heat control valve 74 is operated by the heat control lever 13 when the manual heat control valve 74 is operated at the same time as the ignition operation by the operation member 75 in order to start the control with strong heat. In the case of switching operation from the ignition thermal power position to the maximum thermal power position. In this case, it becomes impossible to prevent the flame from overflowing at the time of ignition. Therefore, when the ignition operation is performed by the operating member 75, the electric heating power control valve 73 is set to a specific intermediate heating power position between the minimum heating power position and the maximum heating power position. This intermediate heating power position is set so that even if the manual heating power control valve 74 is operated from the ignition heating power position to the maximum heating power position side, the heating power to the core 3 becomes higher than the heating power obtained at the ignition heating power position. On the other hand, the position for suppressing a larger situation is, for example, set at a position that is equal to the opening degree at the ignition power position of the manual heat control valve 74 .

According to this, even if the manual heating power control valve 74 is switched from the ignition heating power position to the maximum heating power position at the same time as the ignition operation by the operating member 75, the electric heating power adjustment at the time of the ignition operation is also possible. Since the valve 73 is in the intermediate heating power position, it is possible to suppress a situation where the heating power of the core 3 becomes larger than the heating power obtained at the ignition heating power position. As a result, the flame overflow at the time of ignition can be suppressed more reliably.

Hereinafter, with reference to FIG. 11, the control content of the electric heat control valve 73 by a controller is demonstrated. In the control of the electric heat control valve 73, first, at STEP 1, it is determined whether or not the ignition operation by the operating member 75 has been performed, and more specifically, whether or not the operating member 75 has been pushed in until the ignition is performed is determined. position and turn on both the first and second contacts 771 and 772 of the micro switch 77 . After that, when the ignition operation is performed by the operating member 75, the system proceeds to STEP 2, and the presence or absence of the conditioning container on the oven rack 4 is detected by ON and OFF of the micro switch 91. When the microswitch 91 is turned ON and the presence of the conditioning container is detected, the process proceeds to STEP 3, and the electric heat control valve 73 is switched to the intermediate heat position.

Next, proceeding to STEP 4, it is determined whether or not the operating member 75 has returned to the combustion position, more specifically, whether "the first contact 771 of the micro switch 77 is turned on, and the second contact 772 is turned off". If the operating member 75 returns to the burning position, the process proceeds to STEP 5, and it is determined whether the ignition of the furnace core 3 is detected by the thermocouple 32 serving as the flame detection element, and more specifically, the thermocouple is determined. Whether the voltage has risen to a specific level since 32. When ignition is detected, the system proceeds to STEP 6, and the electric heating power regulating valve 73 is switched to the maximum heating power position. Thereby, the heating power of the furnace core 3 can be increased to the maximum heating power by the manual heating power regulating valve 74 without being regulated by the electric heating power regulating valve 73 at a constant speed. In addition, although not shown in the figure, when the temperature adjustment mode is selected, the electric heat control valve 73 is controlled based on the temperature detected by the pan bottom temperature sensor 33 .

Next, proceeding to STEP 7, it is judged whether or not a flame-off operation by the operating member 75 has been performed, more specifically, whether the operating member 75 has returned to the flame-off position and has caused two of the first and second microswitches 77 to be judged. The contacts 771 and 772 are turned off. On the other hand, at the time of the flameout operation by the operating member 75, the electric heat control valve 73 is switched to a specific standby position at STEP 8, and after that, the process returns to STEP 1, and the electric heat control valve 73 is made to wait until the next time until the ignition operation.

At STEP2, when the micro switch 91 is kept OFF and it is detected that there is no conditioning container, the system proceeds to STEP9, and switches the electric heat control valve 73 to the fully closed state, and further at STEP10 An error display is performed to report that there is no conditioning container. If the electric heat control valve 73 is switched to the fully closed state in this way, even if the solenoid safety valve 71 and the gas master valve 72 are opened during the ignition operation, the gas will not be supplied to the furnace core 3 . Next, at STEP 11, it is judged whether or not the ignition operation by the operating member 75 has ended, and more specifically, whether the operating member 75 has returned to the burning position by releasing the pressing at the ignition position and has caused the micro switch The second contact 772 of 77 is turned OFF, and until the ignition operation is completed, the system returns to STEP 10 and the error display is continued. After that, when the ignition operation is completed, the system proceeds to STEP 8, and the electric heat control valve 73 is switched to the standby position.

Here, if the standby position is set to the intermediate heating position, the electric heating control valve 73 does not need to be driven during the ignition operation by the operating member 75 . However, in this way, when the absence of the conditioning container is detected during the ignition operation, it becomes necessary to switch the electric heat control valve 73 from the intermediate heat position to the fully closed state. However, during the time required for this switch, the system releases gas. Therefore, in the present embodiment, the standby position is set at the fully closed state or a position near the fully closed state, for example, at the minimum heating power position. According to this, when it is detected that the conditioning container does not exist during the ignition operation, the electric heat control valve 73 is immediately set to the fully closed state, and the release of gas can be prevented.

In addition, when the presence of the conditioning container is detected during the ignition operation, it becomes necessary to switch the electric heat control valve 73 from the fully closed state or the standby position near the fully closed state to the intermediate heat position. However, since the electric heat control valve 73 is pushed in the opening direction by the pushing means 734, when the electric heat control valve 73 is moved in the opening direction, almost no load is applied. Instead, the motor 735 can be rotated at a high speed. Therefore, when the presence of the conditioning container is detected during the ignition operation, the electric heat control valve 73 is rotated from the fully closed state or the standby position near the fully closed state by the high-speed rotation of the motor 735. The core 3 can be ignited with good responsiveness by quickly switching to the intermediate heating position.

As mentioned above, although the embodiment of the present invention has been described with reference to the drawings, the present invention is not limited to this. For example, during the ignition operation by the operating member 75, the electric heat control valve 73 may be set to the ignition heat position corresponding to a specific intermediate heat position between the minimum heat position and the maximum heat position (the same as the above-mentioned position). The middle fire position of the embodiment is the same position), and the flame overflow during ignition is suppressed. In this case, during the ignition operation by the operating member 75, the manual heat control valve 74 is set to a specific heat position through the interlocking mechanism 78, and the specific heat position can be set only at In the state where the electric heating power control valve 73 is set to the ignition heating position, the heating power of the core 3 does not become smaller than the heating power that can be obtained at the ignition heating position (specifically, it becomes the same position as the electric heating power). The opening degree of the thermal power control valve 73 at the ignition thermal power position may be equal to or greater than the opening degree), for example, it may be the maximum thermal power position.

Further, in the above-described embodiment, the electric heat regulating valve 73 is provided with the main valve body 732 and the sub valve body 733, but an electric heat control valve of a type having a single valve body may also be used regulating valve. Furthermore, in the above-mentioned embodiment, although the detection means 9 of the conditioning container is configured to detect the presence or absence of the conditioning container on the oven rack 4 by the rise and fall of the temperature sensor 33 at the bottom of the pan, the optical sensor can also be used to detect the presence or absence of the conditioning container. Other means such as detectors can be used to constitute the conditioning container detection means 9 .

In addition, the present invention can also be applied to gas furnaces that do not have the detection means 9 for the conditioning container. In this case, the standby position of the electric thermal power control valve 73 may also be set to the intermediate thermal power position. Furthermore, in the above-described embodiment, the manual heat control valve 74 is operated by the swing type heat control lever 13, but it may be a type that is rotated by rotating the knob.

2: top plate 3: Hearth 4: stove rack 6a: Gas supply path for furnace core (for furnace core gas supply path) 73: Electric fire control valve 735: Motor 74: Manual fire control valve 75: Operating components 78: Linkage mechanism 9: Conditioning container detection means

1 is a perspective view of a gas furnace according to an embodiment of the present invention. [Fig. 2] is a circuit diagram showing the gas piping of the gas furnace according to the embodiment. [ Fig. 3 ] is a cutaway side view of the valve unit for the furnace core installed in the gas furnace of the embodiment. [ Fig. 4 ] is a cut-away side view showing an important part of the operation of the electromagnetic safety valve and the gas main valve provided in the furnace core valve unit by the operation member. [ Fig. 5 ] is an explanatory diagram showing the operation of the microswitch provided in the furnace core valve unit for detecting the position of the operating member. [ Fig. 6 ] is a graph showing a change in thermal power by a manual thermal power control valve provided in the furnace core valve unit. [ Fig. 7] Fig. 7 is a cut plan view taken along the line VII-VII of Fig. 3 . [ Fig. 8 ] is an enlarged cutaway side view of the electric thermal power control valve installed in the furnace core valve unit. [ Fig. 9 ] is a graph showing a change in thermal power caused by an electric thermal power control valve provided in the furnace core valve unit. [ Fig. 10 ] is an explanatory diagram schematically showing the operation of the conditioning container detection means provided in the gas furnace of the embodiment. [ Fig. 11 ] is a flowchart showing the control contents of the electric thermal control valve in the gas furnace of the embodiment.

7: Valve unit

13: Fire adjustment lever

70: valve housing

70a: Inflow port

70b: Outflow port

71: Electromagnetic safety valve

72: Gas master valve

73: Electric fire control valve

74: Manual fire control valve

75: Operating components

76: Joystick

131: Cam hole

701: Hub

702: Guide plate

702a: Pilot hole

711: Valve seat

712: valve body

712a: Valve shaft

713: Armature

714: Electromagnet

715: Valve Spring

721: valve seat

722: valve body

723: Valve Spring

734: Push Means

735: Motor

736: Movement conversion mechanism

737: Direct Motion Components

741: Valve seat

741a: valve hole

742: Needle valve body

742a: Needle

742b: Occlusion

742c: restrictor orifice

743: Pin

751: Boot Block

752: Spring

753: Pressing mechanism

753a: Cam groove

753b: Snap element

781a: Pivot Department

Claims (4)

A gas stove is provided with: The hearth, which heats the conditioning vessel placed on the hob on the top plate; and Manually operated means for igniting and extinguishing the hearth; and A manual heat regulating valve, which is interposed at the gas supply path to the furnace core and is manually operated; and The electric heat control valve is interposed in series with the manual heat control valve at the gas supply path, and is driven by a motor, The gas stove is provided with a linkage mechanism, which sets the manual thermal power control valve to a specific ignition thermal power position between the minimum thermal power position and the maximum thermal power position during the ignition operation caused by the operating member. place, During the ignition operation by the operating member, the electric heat control valve is configured to set the electric heat control valve to a specific intermediate heat position between the minimum heat position and the maximum heat position, and this intermediate heat position is set even if the manual The type heat control valve is operated from the ignition heat position to the maximum heat position side, and can also be a position for suppressing the case where the heat of the hearth becomes larger than the heat obtained at the ignition heat position. The gas stove as described in claim 1, wherein, it has: The means for detecting the conditioning container is to detect the presence or absence of the conditioning container on the above-mentioned oven rack, When it is detected by the conditioning container detection means that there is no conditioning container during the ignition operation by the operating member, the electric heat regulating valve is set to a fully closed state, and the furnace The gas supply to the heart is stopped, and during the flameout operation by the operating member, the electric heat control valve is switched to a specific standby position to wait until the next ignition operation. This standby position is set at In the fully closed state or the position near the fully closed state, when the presence of the conditioning container is detected by the conditioning container detection means during the ignition operation caused by the operating member, the electric heat control valve is turned on. It is switched from the standby position to the aforementioned intermediate heat position. The gas stove as described in claim 1 or 2, wherein, When the ignition of the furnace core is detected by the flame detection element attached to the furnace core after the ignition operation by the operation member, the electric heating power control valve is set from the intermediate heating power. position and switch to the maximum fire position. A gas stove is provided with: The hearth, which heats the conditioning vessel placed on the hob on the top plate; and Manually operated means for igniting and extinguishing the hearth; and A manual heat regulating valve, which is interposed at the gas supply path to the furnace core and is manually operated; and The electric heat control valve is interposed in series with the manual heat control valve at the gas supply path, and is driven by a motor, The gas burner is provided with a linkage mechanism, and the linkage mechanism is used to set the manual thermal power control valve to a specific thermal power position during the ignition operation caused by the operating member, During the ignition operation by the operating member, the electric heat control valve is set to a specific ignition heat position between the minimum heat position and the maximum heat position, and the above-mentioned specific heat position of the manual heat control valve is It is set at a position where the heating power of the core does not become smaller than the heating power that can be obtained at the ignition heating position when the electric heating power control valve is set to the ignition heating position.

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