Pneumatic-electric oven

Abstract

The utility model relates to the technical field of ovens, and discloses a gas-electric oven which comprises a power supply, a gear switch, a microswitch, a pulse igniter, an electric heating tube and a first kick temperature controller, and the gear switch comprises a first switch and a fifth switch; the first switch, the microswitch and the pulse igniter are connected in series to form a first branch; the fifth switch, the first kick temperature controller and the electric heating tube are connected in series to form a second branch; the first branch and the second branch are connected in parallel to form a heating control circuit, and the heating control circuit is connected between the first end and the second end of the power supply; wherein the gear switch comprises a first gear and a second gear, and when the gear switch is located at the first gear, the first switch is closed, and the fifth switch is opened; and when the gear switch is at the second gear, the first switch is opened, and the fifth switch is closed. When the electric heating tube is switched on, the gear switch can control the pulse igniter to be switched off, the microswitch cannot ignite, and the safety of the gas-electric oven is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of ovens, and particularly relates to a gas-electric oven. Background Art

[0002] In the related art, a mechanical gas-electric oven includes an electric heating tube and a lower burner. The electric heating tube is controlled to be turned on and off separately by a micro switch. Therefore, during the use of the electric heating tube, the micro switch will always be in the energized state. The long-term use of a large current by the electric heating tube poses a potential hazard to the service life of the internal metal contacts of the micro switch. Moreover, if the lower burner is ignited during the operation of the electric heating tube, since the temperature inside the oven liner is already at a relatively high temperature, the ignition and combustion of the burner at this time are likely to cause safety risks. Therefore, how to reasonably and reliably control the electric heating tube and the lower burner has become an urgent technical problem to be solved. Summary of the Invention

[0003] In view of this, the utility model provides a gas-electric oven to solve the urgent technical problem of how to reasonably and reliably control the electric heating tube and the lower burner.

[0004] In a first aspect, the utility model provides a gas-electric oven, which includes: a power supply, a gear switch, a micro switch, a pulse igniter, an electric heating tube, and a first snap-action thermostat. The gear switch includes a first switch and a fifth switch;

[0005] The first switch, the micro switch, and the pulse igniter are connected in series to form a first branch circuit;

[0006] The fifth switch, the first snap-action thermostat, and the electric heating tube are connected in series to form a second branch circuit;

[0007] After the first branch circuit and the second branch circuit are connected in parallel, a heating control circuit is formed, and the heating control circuit is connected between the first end and the second end of the power supply;

[0008] Among them, the gear switch includes a first gear and a second gear. When the gear switch is in the first gear, the first switch is closed and the fifth switch is open; when the gear switch is in the second gear, the first switch is open and the fifth switch is closed.

[0009] In the gas-electric oven according to the embodiment of the present utility model, a microswitch and a snap-action thermostat are introduced by a gear switch. The on-off of a pulse igniter is controlled by the on-off of the first switch of the gear switch and the microswitch, and the on-off of an electric heating tube is controlled by the fifth switch of the gear switch and the snap-action thermostat. Moreover, the pulse igniter and the electric heating tube are connected to different gears of the gear switch. Thus, after the electric heating tube is turned on, when the temperature inside the inner cavity exceeds a certain temperature, the snap-action thermostat can automatically cut off the power supply of the electric heating tube, and when the temperature inside the inner cavity drops to a certain temperature, the snap-action thermostat can automatically connect the power supply of the electric heating tube, so that the opening and closing of the electric heating tube can be mechanically and automatically controlled to prevent overheating. In addition, when the electric heating tube is connected, the first switch of the gear switch is in the open state and the fifth switch is in the closed state. The gear switch can control the pulse igniter to be turned off through the first switch, and the pulse igniter cannot be ignited only by the microswitch, effectively ensuring the safety of the gas-electric oven.

[0010] In an optional embodiment, the gas-electric oven further includes a second snap-action thermostat, and the second snap-action thermostat and a heating control circuit are connected in series between the first end and the second end of the power supply.

[0011] In an optional embodiment, the first snap-action thermostat and the second snap-action thermostat are arranged on the shell of the gas-electric oven;

[0012] Wherein, the second snap-action thermostat is arranged at a position farther away from the inner cavity of the gas-electric oven than the first snap-action thermostat.

[0013] In the gas-electric oven according to the embodiment of the present utility model, a second snap-action thermostat is provided and is connected in series with the heating control circuit between the two ends of the power supply voltage. And the second snap-action thermostat is arranged at a position farther away from the inner cavity of the gas-electric oven than the first snap-action thermostat. The problem of unstable temperature in the related art when a temperature control valve is used to control the temperature of the gas heating part of the gas-electric oven is solved.

[0014] In an optional embodiment, the gas-electric oven further includes a bracket, the bracket is arranged on the shell of the gas-electric oven, and the second snap-action thermostat is arranged on the bracket so that the second snap-action thermostat is spaced apart from the shell.

[0015] In the gas-electric oven according to the embodiment of the present utility model, the second snap-action thermostat is arranged on the bracket arranged on the shell of the gas-electric oven, so that a space is formed between the second snap-action thermostat and the shell. Effectively ensuring the reasonableness and accuracy of the temperature collected by the second snap-action thermostat.

[0016] In an optional embodiment, the gas-electric oven further includes a timer, and the timer is connected between the fifth switch and the first snap-action thermostat.

[0017] In the gas-electric oven according to the embodiment of the present utility model, a timer is arranged between the fifth switch and the first snap-action thermostat to ensure the timing control function of the electric heating tube of the gas-electric oven.

[0018] In an alternative embodiment, the gas-electric oven further includes a heating indicator light, which is connected in parallel with the second branch. The second branch includes a first snap-acting thermostat and an electric heating tube connected in series.

[0019] In the gas-electric oven according to the embodiment of the present utility model, a heating indicator light connected in parallel with the second branch is provided, which effectively indicates the working state of the electric heating tube of the gas-electric oven and significantly improves the user experience.

[0020] In an alternative embodiment, the gas-electric oven further includes a cooling fan;

[0021] The cooling fan is connected between the first end and the second end of the power supply to form a cooling circuit.

[0022] In an alternative embodiment, the gas-electric oven further includes a normally open snap-acting temperature control valve, which is connected in series with the cooling fan between the first end and the second end of the power supply.

[0023] In the gas-electric oven according to the embodiment of the present utility model, a cooling circuit is provided, and a normally open snap-acting temperature control valve connected in series with the cooling fan is provided in the cooling circuit. While effectively cooling the gas-electric oven, the on-off of the cooling fan is reasonably controlled to avoid energy waste caused by the long-term rotation of the cooling fan.

[0024] In an alternative embodiment, the gear switch further includes a second switch;

[0025] The gas-electric oven further includes an oven lamp for indicating the working state of the gas-electric oven;

[0026] The oven lamp and the second switch are connected in series to form an indication branch;

[0027] The indication branch is connected in parallel with the first branch and is also connected in parallel with the second branch.

[0028] In the gas-electric oven according to the embodiment of the present utility model, an indication branch connected in parallel with the second branch is provided, where the indication branch includes the oven lamp and the second switch of the gear switch. Thus, while effectively indicating the working state of the oven of the gas-electric oven, the opening and closing of the oven lamp are reasonably controlled, significantly improving the user experience.

[0029] In an alternative embodiment, the gear switch is configured to default to the first gear. Description of the Drawings

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 is a schematic diagram of the working principle of the gas-electric oven provided by an embodiment of the present invention;

[0032] Figure 2 is another schematic diagram of the working principle of the gas-electric oven provided by an embodiment of the present invention;

[0033] Figure 3 shows a schematic diagram of the positions of the first snap-action thermostat 106 and the second snap-action thermostat 107 on the gas-electric oven;

[0034] Figure 4 is Figure 3 an enlarged schematic diagram of part A in

[0035] Figure 5 shows a schematic diagram of the control principle of the gear switch 102 for the gas-electric oven. Specific embodiments

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0037] The present invention provides a gas-electric oven, effectively solving the technical problem of how to reasonably and reliably control the electric heating tube and the lower burner.

[0038] In an embodiment of the present invention, a gas-electric oven is provided. Figure 1 is a schematic diagram of the working principle of the gas-electric oven provided by an embodiment of the present invention. As Figure 1 shown, the gas-electric oven provided by the present invention includes: a power supply 101, a gear switch 102, a micro switch 103, a pulse igniter 104, an electric heating tube 105, and a first snap-action thermostat 106. The gear switch 102 includes a first switch 1021 and a fifth switch 1025.

[0039] Among them, the first switch 1021, the microswitch 103, and the pulse igniter 104 are connected in series to form a first branch (not shown in the figure). The fifth switch 1025, the first snap-acting thermostat 106, and the electric heating tube 105 are connected in series to form a second branch (not shown in the figure). After the first branch and the second branch are connected in parallel, a heating control circuit (not shown in the figure) is formed, and the heating control circuit is connected between the first end and the second end of the power supply 101. The first end can be the neutral line L of the power supply, and the second end can be the live line N of the power supply. The pulse igniter 104 may further include an ignition needle 1041.

[0040] Among them, the gear switch 102 includes a first gear and a second gear. When the gear switch 102 is in the first gear, the first switch 1021 is closed and the fifth switch 1025 is open. When the gear switch 102 is in the second gear, the first switch 1021 is open and the fifth switch 1025 is closed.

[0041] In an embodiment of the present invention, the microswitch 103 may be a microswitch pin provided on the flameout protection valve (not shown in the figure) of the gas-electric oven.

[0042] In the gas-electric oven according to the embodiment of the present invention, the microswitch and the snap-acting thermostat are introduced by the gear switch. The on-off of the pulse igniter is controlled by the on-off of the first switch of the gear switch and the microswitch, and the on-off of the electric heating tube is controlled by the fifth switch of the gear switch and the snap-acting thermostat. And the pulse igniter and the electric heating tube are connected to different gears of the gear switch. Thus, when the electric heating tube is turned on, when the temperature inside the inner tank exceeds a certain temperature, the snap-acting thermostat can automatically cut off the power supply of the electric heating tube, and when the temperature inside the inner tank drops to a certain temperature, the snap-acting thermostat can automatically connect the power supply of the electric heating tube, so as to mechanically and automatically control the opening and closing of the electric heating tube to prevent overheating. In addition, when the electric heating tube is connected, the first switch of the gear switch is open and the fifth switch is closed. The gear switch can control the pulse igniter to be turned off through the first switch, and it is impossible to ignite only by the microswitch, effectively ensuring the safety of the gas-electric oven.

[0043] In an alternative embodiment, the gear switch 102 is configured to default to the first gear.

[0044] In the embodiment of the present invention, a gas-electric oven is provided. Figure 2 It is a schematic diagram of the working principle of another gas-electric oven according to the embodiment of the present invention. As Figure 2 shown, the gas-electric oven provided by the present invention includes: a power supply 101, a gear switch 102, a microswitch 103, a pulse igniter 104, an electric heating tube 105, and a first snap-acting thermostat 106. The gear switch 102 includes a first switch 1021 and a fifth switch 1025.

[0045] Among them, the first switch 1021, the microswitch 103, and the pulse igniter 104 are connected in series to form a first branch (not labeled in the figure). The fifth switch 1025, the first snap-acting thermostat 106, and the electric heating tube 105 are connected in series to form a second branch (not labeled in the figure). After the first branch and the second branch are connected in parallel, a heating control circuit (not labeled in the figure) is formed, and the heating control circuit is connected between the first end and the second end of the power supply 101. The first end can be the neutral line L of the power supply, and the second end can be the live line N of the power supply.

[0046] Among them, the gear switch 102 includes a first gear and a second gear. When the gear switch 102 is in the first gear, the first switch 1021 is closed and the fifth switch 1025 is opened. When the gear switch 102 is in the second gear, the first switch 1021 is opened and the fifth switch 1025 is closed.

[0047] In an alternative embodiment, the gas-electric oven further includes a second snap-acting thermostat 107, and the second snap-acting thermostat 107 is connected in series with the heating control circuit between the first end and the second end of the power supply 101.

[0048] Figure 3 The position schematic diagrams of the first snap-acting thermostat 106 and the second snap-acting thermostat 107 on the gas-electric oven are shown. As Figure 3 shown, in this alternative embodiment, the first snap-acting thermostat 106 and the second snap-acting thermostat 107 are arranged on the housing 100 of the gas-electric oven.

[0049] Among them, the second snap-acting thermostat 107 is arranged at a position farther from the inner container (not labeled in the figure) of the gas-electric oven than the first snap-acting thermostat 106.

[0050] In the gas-electric oven of the embodiment of the present utility model, the second snap-acting thermostat 107 is provided and connected in series with the heating control circuit across the two ends of the voltage of the power supply 101. And the second snap-acting thermostat 107 is arranged at a position farther from the inner container of the gas-electric oven than the first snap-acting thermostat 106. This solves the problem of unstable temperature when the temperature control valve is used to control the temperature of the gas heating part of the gas-electric oven in the related art.

[0051] As Figure 3 and Figure 4 shown, in an alternative embodiment, the gas-electric oven further includes a bracket 1071, the bracket 1071 is arranged on the housing 100 of the gas-electric oven, and the second snap-acting thermostat 107 is arranged on the bracket 1071 so that the second snap-acting thermostat 107 is spaced apart from the housing 100.

[0052] In the gas-electric oven according to the embodiment of the present utility model, the second snap-acting thermostat 107 is arranged on the bracket 1071 provided on the shell of the gas-electric oven, so that a gap is formed between the second snap-acting thermostat 107 and the shell 100. This effectively ensures the reasonableness and accuracy of the temperature collected by the second snap-acting thermostat 107. Generally, the first snap-acting thermostat 106 is more likely to trip earlier than the second snap-acting thermostat 107. Only by disconnecting the electric heating tube 105 to cool down, it will not affect the use of other components connected to the furnace lamp 112, heating indicator lamp 109, and other gear switches 102. However, if the first snap-acting thermostat 106 fails, or the temperature continues to rise after the first snap-acting thermostat 106 trips, the second snap-acting thermostat 107 can trip, thus further ensuring the safety of the equipment.

[0053] In an optional embodiment, the gas-electric oven further includes a timer 108, and the timer 108 is connected between the fifth switch 1025 and the first snap-acting thermostat 106.

[0054] In the gas-electric oven according to the embodiment of the present utility model, a timer 108 is arranged between the fifth switch 1025 and the first snap-acting thermostat 106 to ensure the timing control function of the electric heating tube 105 of the gas-electric oven.

[0055] In an optional embodiment, the gas-electric oven further includes a heating indicator lamp 109, and the heating indicator lamp 109 is connected in parallel with the second branch. The second branch includes the first snap-acting thermostat 106 and the electric heating tube 105 connected in series.

[0056] In the gas-electric oven according to the embodiment of the present utility model, a heating indicator lamp 109 connected in parallel with the second branch is provided. It effectively indicates the working state of the electric heating tube 105 of the gas-electric oven, significantly improving the user experience.

[0057] In an optional embodiment, the gas-electric oven further includes a cooling fan 110, and the cooling fan 110 is connected between the first end and the second end of the power supply 101 to form a cooling circuit (not marked in the figure).

[0058] In an optional embodiment, the gas-electric oven further includes a normally open snap-acting temperature control valve 111, and the normally open snap-acting temperature control valve 111 is connected in series with the cooling fan 110 between the first end and the second end of the power supply 101.

[0059] In the gas-electric oven according to the embodiment of the present utility model, a cooling circuit is provided, and a normally open snap-acting temperature control valve 111 connected in series with the cooling fan 110 is arranged in the cooling circuit. While effectively cooling the gas-electric oven, it reasonably controls the on-off of the cooling fan 110 to avoid energy waste caused by the long-term rotation of the cooling fan 110.

[0060] In an alternative embodiment, the gear switch 102 further includes a second switch 1022, and the gas-electric oven further includes an oven lamp 112 for indicating the working state of the gas-electric oven. The oven lamp 112 and the second switch 1022 are connected in series to form an indicating branch (not labeled in the figure), and the indicating branch is connected in parallel with the first branch and also connected in parallel with the second branch.

[0061] In an alternative embodiment, the gear switch may further include a third switch 1023 and a fourth switch 1024. The third switch 1023 and the fourth switch 1024 are used for gear control of the gear switch.

[0062] Figure 5 The schematic diagram of the control principle of the gas-electric oven by the gear switch 102 is shown. Refer to Figure 5 , in an alternative embodiment of the present utility model, during the clockwise rotation of the gear switch 102, it can be successively rotated to gears 0, 1, 2, 3, and 4. When the gear switch 102 is rotated to gears 0, 1, 2, 3, and 4, the opening and closing states of the contacts 1a, 2a, 3a, 4a, and 5a of the first switch 1021, the second switch 1022, the third switch 1023, the fourth switch 1024, and the fifth switch 1025 of the gear switch 102 are as Figure 5 shown. The gear switch reserves a contact 6a. Figure 5 1, 2, 3, 4, and 5 corresponding to the contacts 1a, 2a, 3a, 4a, and 5a of the gear switch 102 in the vertical direction in

[0063] For example, when the gear switch 102 is rotated to gear 0, the contact of the first switch 1021 is closed, and the contacts of the second switch 1022, the third switch 1023, the fourth switch 1024, and the fifth switch 1025 are all open, and the gas-electric oven is in the OFF (closed) state.

[0064] When the gear switch 102 is rotated to gear 1, the contacts of the first switch 1021, the second switch 1022, and the third switch 1023 are closed, and the contacts of the fourth switch 1024 and the fifth switch 1025 are open.

[0065] When the gear switch 102 is rotated to gear 2, the contacts of the first switch 1021, the second switch 1022, and the fourth switch 1024 are closed, and the contacts of the third switch 1023 and the fifth switch 1025 are open.

[0066] When the gear switch 102 is rotated to gear 3, the contacts of the first switch 1021, the second switch 1022, the third switch 1023, and the fourth switch 1024 are closed, and the contact of the fifth switch 1025 is open.

[0067] The gear shift switch 102 is rotated to gear 4, the contacts of the second switch 1022, the third switch 1023 and the fifth switch 1025 are closed, and the contacts of the first switch 1021 and the fourth switch 1024 are opened.

[0068] In this way, the live wire at the power supply end is connected from the input end of the power supply 101 to the first switch 1021 and the fifth switch 1025 of the gear shift switch 102. The first switch 1021 of the gear shift switch 102 introduces the micro switch pin on the flameout protection valve, and the micro switch pin serves as the micro switch 103. The micro switch 103 is connected to the L pin of the pulse igniter 104, and the connection of the L end of the pulse igniter 104 is controlled by the on / off of the micro switch pin on the flameout protection valve. The live wire led out by the fifth switch 1025 of the gear shift switch 102 is connected to the first end of the timer 108, and the second end of the timer 108 leads out a live wire to control the first snap-action thermostat 106, and the first snap-action thermostat 106 controls the electric heating tube 105. When the electric heating tube 105 is connected, the first switch 1021 of the gear shift switch 102 is opened, and at this time the pulse igniter is disconnected, and the pulse igniter cannot ignite through the control of the flameout protection valve. During the operation of the electric heating tube 105, when the temperature of the box body reaches the disconnection temperature of the first snap-action thermostat 106, the electric heating tube 105 stops heating.

[0069] Thus, through the cooperation of the micro switch pin of the flameout protection valve and the gear shift switch, the control of the pulse igniter of the gas-electric oven is realized, the use of the temperature control valve is avoided, and the cost of the valve body is greatly reduced. At the same time, the temperature control deviation caused by the use of the temperature control valve is solved. In addition, the control of the on / off of the electric heating tube by using the micro switch is avoided, making the control of the electric heating tube safer and more reliable.

[0070] The functional descriptions of the same devices or branches among the above different embodiments are presented in one of the embodiments, and will not be repeated in the corresponding other embodiments.

[0071] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A gas-electric oven, characterized in that: The gas-electric oven comprises: a power supply, a gear switch, a micro switch, a pulse igniter, an electric heating tube and a first sudden jump thermostat, wherein the gear switch comprises a first switch and a fifth switch; The first switch, the micro switch and the pulse igniter are connected in series to form a first branch; The fifth switch, the first sudden jump thermostat and the electric heating tube are connected in series to form a second branch; After the first branch and the second branch are connected in parallel, a heating control circuit is formed, and the heating control circuit is connected between the first end and the second end of the power supply; Wherein, the gear switch includes a first gear and a second gear. When the gear switch is in the first gear, the first switch is closed and the fifth switch is opened; when the gear switch is in the second gear, the first switch is opened and the fifth switch is closed.

2. The gas-electric oven according to claim 1, characterized in that: The gas-electric oven further comprises a second kick thermostat, which is connected in series with the heating control circuit between the first end and the second end of the power supply.

3. The gas-electric oven according to claim 2, characterized in that: The first sudden jump thermostat and the second sudden jump thermostat are arranged on the housing of the gas electric oven; Wherein, the second sudden jump thermostat is arranged at a position away from the inner pot of the gas electric oven relative to the first sudden jump thermostat.

4. The gas-electric oven according to claim 2, characterized in that: The gas-electric oven further comprises a bracket, wherein the bracket is arranged on a shell of the gas-electric oven, and the second sudden jump thermostat is arranged on the bracket so that the second sudden jump thermostat is spaced apart from the shell.

5. The gas-electric oven according to claim 1, characterized in that: The gas-electric oven further comprises a timer connected between the fifth switch and the first kick thermostat.

6. The gas-electric oven according to claim 1, characterized in that: The gas-electric oven further comprises a heating indicator light, which is connected in parallel with a second branch, and the second branch comprises the first sudden jump thermostat and the electric heating tube which are connected in series.

7. The gas-electric oven according to claim 1, characterized in that: The gas-electric oven also includes a cooling fan; The cooling fan is connected between the first end and the second end of the power supply to form a cooling circuit.

8. The gas-electric oven according to claim 7, characterized in that: The gas-electric oven further comprises a normally-open sudden-jump temperature control valve, and the normally-open sudden-jump temperature control valve is connected in series with the cooling fan between the first end and the second end of the power supply.

9. The gas-electric oven according to claim 1, characterized in that: The gear switch also includes a second switch; The gas-electric oven further comprises an oven light for indicating the working state of the gas-electric oven; The furnace lamp and the second switch are connected in series to form an indication branch; The indication branch is connected in parallel with the first branch, and the indication branch is connected in parallel with the second branch.

10. The gas-electric oven according to claim 1, characterized in that: The gear switch is configured to be in the first gear position by default.

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