A kind of anti-air burning control device

Abstract

The present invention belongs to the technical field of stove anti-empty burning, and specifically relates to an anti-empty burning control device. The present invention includes a normally open flame solenoid valve, a main fire solenoid valve, and an ignition and flameout protection module electrically connected to a power module, and the power module is also electrically connected to the main fire solenoid valve through a main fire circuit; the ignition and flameout protection module extends two control circuits, wherein the first control circuit is connected to the ignition needle at the normally open flame igniter to control the ignition needle to produce an ignition action, and the second control circuit is arranged at the ignition and flameout protection relay KJ1, thereby controlling the normally open contact K1 connected in series to the main fire circuit to produce a switching action; the device also includes a pot detection sensor, and a relay module is arranged at the pot detection sensor, thereby controlling the normally open contact K3 connected in series to the main fire circuit and the normally open contact K1 to produce a switching action. The present invention not only has high working stability, but also has the characteristics of low cost and easy maintenance, which is conducive to practical use.

Description

Technical Field

[0001] The invention belongs to the technical field of stove empty burning prevention, and in particular relates to an empty burning prevention control device. Background Art

[0002] Commercial cooking stoves are widely used in my country, and their energy consumption is also very considerable. In actual operation, due to the busyness of chefs when cooking and their weak awareness of energy conservation, the stove is often left burning after the pot leaves the furnace; such empty burning not only wastes energy, but also increases the risk of kitchen fires, and also increases the emission of kitchen waste heat and exhaust gas for no reason, which needs to be solved urgently. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and to provide an anti-air burning control device using the device, which not only has high working stability, but also has the characteristics of low cost and easy maintenance, which is conducive to practical use.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A control device for preventing empty burning, comprising a normally open flame solenoid valve for opening and closing a normally open flame gas circuit and a main fire solenoid valve for opening and closing a main fire gas circuit, characterized in that: the device also comprises an ignition and flameout protection module electrically connected to a power module, the power module is also electrically connected to the main fire solenoid valve through a main fire circuit; the ignition and flameout protection module extends two control circuits, wherein the first control circuit is connected to an ignition needle at a normally open flame igniter to control the ignition needle to produce an ignition action, and an ignition and flameout protection relay KJ1 is arranged at the second control circuit to control a normally open contact K1 connected in series to the main fire circuit to produce a switching action; the device also comprises a pot detection sensor electrically connected to the power module, a relay module is arranged at the pot detection sensor, so that the relay module produces power-on and power-off actions according to whether there is a pot on the burner, thereby controlling the normally open contact K3 connected in series with the normally open contact K1 on the main fire circuit to produce a switching action.

[0006] Preferably, the pot detection sensor is a diffuse reflection photoelectric sensor or an ultrasonic sensor; an intermediate circuit is bridged on the main fire circuit, and the normally open contact K2 and the power-off delay relay KT3 are connected in series on the intermediate circuit; the relay module is an intermediate relay KJ2 that generates power gain and loss actions according to whether there is a pot on the burner, and the intermediate relay KJ2 controls the normally open contact K2 to generate a switching action, and the power-off delay relay KT3 controls the normally open contact K3 to generate a switching action.

[0007] Preferably, the pot detection sensor is a diffuse reflection photoelectric sensor or an ultrasonic sensor; the relay module is a power-off delay relay KT3, thereby directly controlling the normally open contact K3 to produce a switching action.

[0008] Preferably, the pot detection sensor is a diffuse reflection photoelectric sensor or an ultrasonic sensor; the relay module is an intermediate relay KJ2 that generates power gain and loss actions according to whether there is a pot on the burner, and the intermediate relay KJ2 directly controls the normally open contact K3 to generate a switching action.

[0009] Preferably, the power module and the ignition and flameout protection module are connected to an external power supply through a main circuit, and a power switch K0 is arranged on the main circuit; the blower is electrically connected to the main circuit and is controlled by a wind pressure switch K m Control opening and closing.

[0010] Preferably, the pot detection sensor is fixed on a fixing bracket on the stove frame, and an installation box with a hollow cavity is arranged on the top of the fixing bracket, and the pot detection sensor is arranged in the installation box. The light-sensitive path of the pot detection sensor points to the position of the pot at the stove head, and the installation box is penetrated with an opening for avoiding the light-sensitive path of the pot detection sensor; a guide plate for guiding the cleaning medium at the sensing surface extends downward from the sensing surface of the sensor, and a guide hole is penetrated at the box wall of the installation box, the guide plate passes downward through the guide hole and extends to the external environment, and there is a passage gap between the guide surface of the guide plate and the wall of the guide hole for the circulation of the cleaning medium.

[0011] Preferably, the installation box has a square box shape, with the box wall on the side of the installation box facing the furnace head as the main box wall, a slope is arranged between the main box wall and the top box wall of the installation box, and the opening is opened on the slope; the top of the fixing frame is assembled at the rear part of the bottom box wall of the installation box, and the guide hole is located at the front part of the bottom box wall of the installation box.

[0012] Preferably, the device also includes an angle adjustment portion for adjusting the pitch angle of the sensing surface at the pot detection sensor; the angle adjustment portion includes mounting holes horizontally penetrating the box walls on both sides of the installation box, the mounting holes are arc-shaped waist-shaped holes, and the arc curvature center of the mounting hole and the direction of the light-sensitive path of the pot detection sensor are opposite to each other; threaded adjustment rods extend from the two side walls of the pot detection sensor in opposite directions, and the threaded adjustment rods pass through the installation box through a group of mounting holes respectively, and are fastened to the box walls on both sides of the installation box by adjusting nuts.

[0013] Preferably, the fixing frame is in the shape of a "C"-shaped groove with its opening facing the direction of the stove frame, the lower arc opening of the fixing frame constitutes a fixing end for fixing the stove frame, the upper eaves of the fixing frame constitutes a blocking end for blocking the cleaning medium from entering the fixing frame groove cavity through the guide hole, and the groove cavity of the fixing frame constitutes a accommodating cavity for placing the signal line of the pot detection sensor.

[0014] Preferably, a rotating shaft is horizontally installed at the upper edge of the opening, and the cover plate rotates around the rotating shaft to cover the opening from the outside.

[0015] The beneficial effects of the present invention are:

[0016] 1) Through the above scheme, the present invention relies on the detection of the pot position by the pot detection sensor, combined with the control of the main fire solenoid valve by the series relay, to achieve that after the stove power is turned on, during the normal operation of the equipment, when the pot is placed on the furnace or the chef is flipping the pot to cook, the main fire is ignited in time by the constant open flame; when the pot is away from the furnace, the main fire can be extinguished in response, thereby achieving an automated anti-empty burning control effect. Obviously, the present invention not only has high working stability, but also has the characteristics of low cost and easy maintenance, which is conducive to practical use.

[0017] 2) Further, for the pot detection sensor, on the one hand, by arranging a fixing frame with an installation box, the pot detection sensor is reliably accommodated, and the oil stains that are necessary during operation are avoided, which may cause contamination to the fragile and sensitive sensor components; at the same time, by arranging the openings, the sensing surface of the pot detection sensor is protected as much as possible, while not hindering the normal use of the pot detection sensor. On the other hand, when the sensing surface of the pot detection sensor inevitably has oil stains and needs to be cleaned, the cleaning medium can be directly sprayed from the opening, and the cleaning medium will carry the oil stains and leak out from the guide hole along the guide plate without affecting the working of the pot detection sensor located in the installation box, which is very convenient to use. The present invention can sense the presence or absence of the pot in the furnace above the stove head through the pot detection sensor, and then realize the anti-empty burning control through the coordinated control of a series of relays; at the same time, it also has the online protection and cleaning functions of the pot detection sensor, so that the purpose of anti-empty burning control of commercial cooking stoves can be realized reliably for a long time.

[0018] 3) Furthermore, the opening should be arranged on the slope, so as to achieve the purpose of the pot detection sensor being at an upward illumination angle relative to the pot; in this way, the sensor position can be relatively low during assembly, thereby reducing the impact on the normal use of the stove after assembly. Similarly, the pot detection sensor should also be able to adjust the pitch angle through the angle adjustment part, so that it has good adaptability for the detection of pots of various sizes. The opening, that is, the "C"-shaped slot-shaped opening part mentioned above, is horizontally installed with a rotating shaft at the upper edge position, and the metal hinge rotates around the shaft to cover the opening from the outside. This design is used to prevent the sensor from being contaminated when the equipment is out of use for a long time.

[0019] 4) The outlet path of the cleaning medium should not affect the sensor body and the corresponding signal line. Therefore, the fixing frame can be designed independently so that the upper eaves of the fixing frame naturally form a shielding structure to ensure that the cleaning medium is away from the groove cavity of the fixing frame to ensure the working reliability of the component. A rotating shaft is horizontally installed at the upper edge of the opening, and the cover plate rotates around the rotating shaft to cover the opening from the outside. This design is used to cover the opening to prevent pollution when the equipment is out of use for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 An electrical circuit diagram of the present invention;

[0021] Figure 2 This is the front view of the pot detection sensor;

[0022] Figure 3 for Figure 2 A cross-sectional view of

[0023] Figure 4 for Figure 2 Right view of .

[0024] The actual correspondence between the reference numerals and component names of the present invention is as follows:

[0025] a-main fire circuit b-first control circuit c-second control circuit

[0026] d-main circuit e-intermediate circuit

[0027] 10-fixed frame 11-upper eaves 12-lower arc

[0028] 20-installation box 20a-slope 21-opening 22-diversion hole

[0029] 30-Pot sensor 31-Deflector

[0030] 41-Mounting hole 42-Threaded adjustment rod 43-Adjusting nut

[0031] 50-Power module 60-Ignition and flameout protection module 70-Blower

[0032] 80- Constant flame igniter 90- Burner head DETAILED DESCRIPTION

[0033] For ease of understanding, here we combine Figure 1-4 The specific structure and working mode of the present invention are further described as follows:

[0034] The specific components of the present invention include: a power switch K0, a power module 50, an ignition and flameout protection module 60, a pot detection sensor 30, a constant fire solenoid valve DCF1, a main fire solenoid valve DCF2, an air pressure switch K m and blower 70, etc. During assembly, Figure 1 As shown, the air pressure switch K m Installed at the air outlet of the blower 70 and connected to the ignition and flameout protection module 60; the ignition and flameout protection module 60 is electrically connected to the ignition needle in the constant flame igniter and the constant flame solenoid valve DCF1 through the first control circuit b and the second control circuit c respectively. Figure 1 In the specific embodiment, the pot detection sensor 30 is connected to the power module 50 through the intermediate relay KJ2, and the intermediate relay KJ2 controls the power-off delay relay KT3, and the power-off delay relay KT3 controls the main fire electromagnetic valve DCF2. The power module 50 is respectively connected to the pot detection sensor 30, each electromagnetic valve and each relay.

[0035] The specific workflow is as follows:

[0036] ① After the stove power switch K0 is turned on, the blower 70 is powered on and the ignition and flameout protection module 60 delays for several seconds to pre-purge the furnace. m When the air pressure at the air outlet of the blower 70 reaches the set value range, the air pressure switch K m In this case, when the delay ends, the ignition and flameout protection module 60 starts the high-voltage ignition program, such as Figure 1 The output high voltage V1 shown generates an arc between the two ignition needles, and outputs an excitation voltage V2 to the normally open flame solenoid valve DCF1 to connect the normally open flame gas circuit and ignite the normally open flame.

[0037] ② The ignition and flameout protection module 60 enters the "working" state after detecting the normal burning of the flame through the flame detection sensor, and Figure 1 The output excitation voltage V3 is used to close the ignition and flameout protection relay KJ1; if the ignition and flameout protection module 60 detects that the burning state of the flame is abnormal through the flame detection sensor, its output voltage is low, the ignition and flameout protection relay KJ1 loses power, the normally open contact K1 is disconnected, and the sound alarm circuit is triggered to warn. The flame detection sensor is preferably a flame ion detection sensor.

[0038] ③ When the pot is placed on the furnace, the diffuse reflection photoelectric sensor or ultrasonic sensor, i.e., the pot detection sensor 30, detects a sufficient amount of light reflection signal. Figure 1 The output high-level voltage V4 shown in the figure, along with the normally open intermediate relay KJ2 being energized, the normally open contact K2 is closed, the power-off delay relay KT3 is energized, the normally open contact K3 is closed, and thus the main fire electromagnetic valve DCF2 is turned on. The power supply comes from the power module 50.

[0039] ④ When the pot leaves the furnace, the pot detection sensor 30 fails to receive a sufficient amount of reflected light signals, and its output voltage V4 is low, the normally open contact K2 is disconnected, and the control coil power of the power-off delay relay KT3 is cut off. The delay threshold of the power-off delay relay KT3 has been set in advance. After the delay threshold is reached, the normally open contact K3 controlled by the power-off delay relay KT3 is disconnected, the power module 50 stops supplying power to the control coil of the main fire electromagnetic valve DCF2, and the main fire electromagnetic valve DCF2 is closed. The delay design of the power-off delay relay KT3 has the advantage of avoiding the situation that when the chef is flipping the pot to cook, the light signal intensity reflected back from the outside of the pot may be insufficient at a certain moment due to the rapid dynamic change of the pot, resulting in the diffuse reflection photoelectric sensor or ultrasonic sensor output voltage V4 being low, thereby causing the main fire to be accidentally turned off; this delay design can effectively eliminate the interference of this accidental incident and enhance the stability of the anti-air burning function.

[0040] ⑤When the pot is placed on the furnace again, repeat the above steps ③ and ④.

[0041] The pot detection sensor 30 is fixed to the fixing frame 10 on the stove frame, that is, the installation box 20 is built with the pot detection sensor 30, and the pot is irradiated and controlled through the opening 21 on the slope 20a. To ensure the real-time cleaning function of the sensing surface of the pot detection sensor, a cleaning medium can be sprayed into the opening 21, and the cleaning medium is then sprayed along the Figure 2 The water flows down the guide plate shown and finally flows out of the device through the guide holes 22 .

[0042] The appearance of the fixing frame 10 is shown in FIG. Figure 1 As shown, during assembly, the lower arc opening 12 is hooked onto the stove frame from bottom to top, which can be welded or screwed; the upper eaves 11 of the fixing frame 10 naturally constitutes a waterproof structure similar to an eave, so that the cleaning medium mixed with dirt naturally guided out from the guide plate 31 will not enter the interior of the fixing frame 10, thereby avoiding affecting the internal sensor devices and corresponding signal lines.

[0043] Of course, it will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0045] The techniques, shapes, and structural parts not described in detail in the present invention are all well-known techniques.

Claims

1. An anti-air burning control device, comprising a normally open fire solenoid valve DCF1 for opening and closing a normally open fire gas path and a main fire solenoid valve DCF2 for opening and closing a main fire gas path, characterized in that: The device also includes an ignition and flameout protection module (60) electrically connected to the power module (50), and the power module (50) is also electrically connected to the main fire solenoid valve DCF2 through the main fire circuit (a); The ignition and flameout protection module (60) extends two control circuits, wherein the first control circuit (b) is connected to the ignition pin at the normally open flame igniter (80) to control the ignition pin to produce an ignition action, and the second control circuit (c) is arranged with an ignition and flameout protection relay KJ1 to control the normally open contact K1 connected in series with the main fire circuit (a) to produce a switching action; the device also includes a pot detection sensor (30) electrically connected to the power module (50), and a relay module is arranged at the pot detection sensor (30), so that the relay module produces power-on and power-off actions according to whether there is a pot on the burner, and then controls the normally open contact K3 connected in series with the normally open contact K1 on the main fire circuit (a) to produce a switching action through the power-off delay relay KT3; The working process of power-off delay relay KT3 includes: When the pot leaves the furnace, the pot detection sensor (30) fails to receive sufficient signals, the control coil power of the power-off delay relay KT3 is cut off, and after the delay threshold is reached, the normally open contact K3 controlled by the power-off delay relay KT3 is disconnected, and the main fire solenoid valve DCF2 is closed; The pot detection sensor (30) is a diffuse reflection photoelectric sensor or an ultrasonic sensor; the main fire circuit (a) is bridged with an intermediate circuit (e), and the intermediate circuit (e) is connected in series with a normally open contact K2 and a power-off delay relay KT3; the relay module is an intermediate relay KJ2 that generates a power-on and power-off action according to whether there is a pot on the stove head (90), the intermediate relay KJ2 controls the normally open contact K2 to generate a switching action, and the power-off delay relay KT3 controls the normally open contact K3 to generate a switching action; The pot detection sensor (30) is a diffuse reflection photoelectric sensor or an ultrasonic sensor; the relay module is the power-off delay relay KT3, thereby directly controlling the normally open contact K3 to produce a switching action.

2. The anti-air burning control device according to claim 1, characterized in that: The power module (50) and the ignition and flameout protection module (60) are both connected to an external power source via a main circuit (d), and a power switch K0 is arranged on the main circuit (d); the blower (70) is electrically connected to the main circuit (d), and is controlled to be turned on and off via a wind pressure switch Km.

3. The anti-air burning control device according to claim 1, characterized in that: The pot detection sensor (30) is fixed on a fixing frame (10) on a stove frame. A mounting box (20) with a hollow cavity is arranged at the top of the fixing frame (10). The pot detection sensor (30) is arranged in the mounting box (20). The light sensing path of the pot detection sensor (30) points to the location of the pot at the stove head. An opening (21) is provided through the mounting box (20) for avoiding the light sensing path of the pot detection sensor (30). A guide plate (31) for guiding a cleaning medium at the sensing surface extends downward from the sensing surface of the pot detection sensor (30). A guide hole (22) is provided through the wall of the mounting box (20). The guide plate (31) passes through the guide hole (22) downward and extends to the external environment. A clearance for the cleaning medium to flow exists between the guide surface of the guide plate (31) and the hole wall of the guide hole (22).

4. The anti-air burning control device according to claim 3 is characterized in that: The installation box (20) is in the shape of a square box, with the box wall of the installation box (20) facing the furnace head as the main box wall, a slope (20a) is arranged between the main box wall and the top box wall of the installation box (20), and the opening (21) is provided on the slope (20a); the top end of the fixing frame (10) is mounted at the rear part of the bottom box wall of the installation box (20), and the guide hole (22) is located at the front part of the bottom box wall of the installation box (20).

5. The anti-air burning control device according to claim 4, characterized in that: The device also comprises an angle adjustment portion for adjusting the pitch angle of the sensing surface of the pot detection sensor (30); the angle adjustment portion comprises a mounting hole (41) horizontally penetrating through the box walls on both sides of the mounting box (20); the mounting hole (41) is an arc-shaped waist-shaped hole, and the arc curvature center of the mounting hole (41) and the light sensing path of the pot detection sensor (30) are pointing in opposite directions to each other; threaded adjustment rods (42) extend from the two side walls of the pot detection sensor (30) in opposite directions to each other, and the threaded adjustment rods (42) respectively pass through the mounting box (20) through a group of mounting holes (41) and are fastened to the box walls on both sides of the mounting box (20) by adjustment nuts (43).

6. The anti-air burning control device according to claim 5, characterized in that: The fixing frame (10) is in the shape of a "C"-shaped groove with its opening facing the direction where the stove frame is located. The lower arc opening (12) of the fixing frame (10) constitutes a fixing end for fixing the stove frame. The upper eaves (11) of the fixing frame (10) constitutes a blocking end for blocking the cleaning medium from entering the groove cavity of the fixing frame (10) through the guide hole (22). The groove cavity of the fixing frame (10) constitutes an accommodating cavity for placing a signal line of a pot detection sensor (30).

7. The anti-air burning control device according to claim 6, characterized in that: A rotating shaft is horizontally mounted at the upper edge of the opening (21), and the cover plate rotates around the rotating shaft to cover the opening (21) from the outside.

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