Range hood with gas leakage early warning function

Abstract

The utility model discloses a range hood with a gas leakage early warning function, which comprises a range hood body, a plurality of target areas are arranged at different positions of the outer end of the range hood, laser transceivers are mounted in the target areas, a control circuit and a fan are mounted in the range hood, and the control circuit is connected with the fan. The control circuit comprises a main control module, an early warning module, a 485 conversion module, a power supply module, a wireless communication module and a motor driving module. According to the technical scheme, the multiple laser transceivers are arranged on the range hood body, the main control module achieves the data transmission function with the laser transceivers through the 485 conversion module, the gas concentration in the range hood installation space is detected through the laser transceivers, the detection range is wide, the detection result is accurate, and the gas concentration in the large space can be reflected.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen and bathroom appliances, and more specifically to a range hood with a gas leakage early warning function. Background Art

[0002] With the development of society, more and more rural areas are gradually moving towards urbanization, and wood-burning stoves are gradually being replaced by gas stoves. While gas stoves bring us convenience, safety issues also arise. Therefore, gas safety has become a major problem in the kitchen appliance industry.

[0003] The current solution to this technical problem is to install a gas sensor on the stove or gas pipeline to detect gas concentration within a certain range. However, it is obvious that the detection range of gas sensors in existing technologies is relatively small, and they can only detect within a small area, and cannot reflect the gas concentration in the entire space. Therefore, existing technologies suffer from the technical problem of inaccurate gas detection. Utility Model Content

[0004] In order to solve the above technical problems, the purpose of the present utility model is to provide a range hood with a gas leakage warning function.

[0005] The technical solution adopted by the utility model to solve the problem is:

[0006] A range hood with a gas leak warning function comprises a range hood body, wherein a plurality of target areas are provided at different positions on the outer end of the range hood, a laser transceiver is installed in the target area, a control circuit and a fan are installed inside the range hood, the control circuit comprises a main control module, an early warning module, a 485 conversion module, a power module, a wireless communication module and a motor drive module, the power module is respectively connected to the main control module, the early warning module, the 485 conversion module, the wireless communication module and the motor drive module, the main control module is respectively connected to the early warning module, the 485 conversion module, the wireless communication module and the motor drive module, the motor drive module is connected to the fan, and the 485 conversion module is connected to the laser transceiver.

[0007] As a further improvement of the above technical solution, the angle between the output light beam of the laser transceiver and the horizontal plane is greater than 45 degrees.

[0008] As a further improvement of the above technical solution, the 485 conversion module includes a conversion chip with a model number of 65LBC184, a varistor RA, a varistor RB, a varistor RC, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8 and a capacitor C1. The conversion chip is configured with a first input end, a second input end, a first output end and a second output end. The first output end of the conversion chip is connected to the power module through the resistor R1, the first output end of the conversion chip is connected to the laser transceiver through the resistor R2, the second output end of the conversion chip is connected to the ground end through the resistor R3, the second output end of the conversion chip is connected to the laser transceiver through the resistor R4, and one end of the resistor R5 is connected to the resistor R2 and the laser transceiver. The other end of the resistor R5 is connected to the connection point of the resistor R4 and the laser transceiver, the varistor RA is connected in parallel with the resistor R5, one end of the varistor RB is connected to the connection point of the resistor R4 and the laser transceiver, the other end of the varistor RB is connected to the ground, one end of the varistor RC is connected to the connection point of the resistor R2 and the laser transceiver, the other end of the varistor RC is connected to the ground, the first input end of the conversion chip is connected to the main control module through the resistor R8, the second input end of the conversion chip is connected to the main control module through the resistor R7, the second input end of the conversion chip is connected to the power supply module through the resistor R6, one end of the capacitor C1 is connected to the connection point of the resistor R7 and the main control module, and the other end of the capacitor C1 is connected to the ground.

[0009] As a further improvement of the above technical solution, the power module includes a mains input terminal, an EMI filter, a rectifier, an input filter, a power chip model SP6645HF, a transformer, an output filter, a photocoupler, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a diode D1, a diode D2, a diode D3 and a voltage regulator D4. The power chip is configured with a power supply terminal, a feedback terminal, a sampling terminal and a driving terminal. The transformer is configured with a first winding LA, a second winding LB and the third winding LC, the mains input end is connected to the EMI filter, the EMI filter is connected to the rectifier, the rectifier is connected to the input filter, the input filter is connected to one end of the first winding LA, the other end of the first winding LA is respectively connected to the positive electrode of the diode D1 and the driving end of the power chip, the cathode of the diode D1 is successively connected to the connection point of the input filter and the first winding LA through the resistor R9 and the capacitor C2, one end of the second winding LB is respectively connected to the positive electrode of the diode D2 and one end of the capacitor C3 The other end of the capacitor C3 is connected to the cathode of the diode D2 through the resistor R10, the cathode of the diode D2 is connected to the output filter, the other end of the second winding LB is connected to the ground, one end of the resistor R14 is connected to the cathode of the diode D2, the other end of the resistor R14 is connected to the cathode of the voltage regulator tube D4 through the resistor R15, the positive electrode of the voltage regulator tube D4 is connected to the ground, the anode input end of the photoelectric coupler is connected to the connection point of the resistor R14 and the resistor R15, and the cathode input end of the photoelectric coupler is connected to the cathode of the voltage regulator tube D4. The emitter of the photoelectric coupler is connected to the ground, the collector of the photoelectric coupler is connected to the feedback end of the power supply chip, the feedback end of the power supply chip is connected to the ground through the capacitor C4, the sampling end of the power supply chip is connected to the ground through the resistor R11, one end of the tertiary winding LC is connected to the ground, the other end of the tertiary winding LC is connected to the anode of the diode D3, the cathode of the diode D3 is connected to the ground through the resistor R12, the resistor R13 and the capacitor C5 in sequence, and the power supply end of the power supply chip is connected to the connection point of the resistor R13 and the capacitor C5.

[0010] As a further improvement of the above technical solution, the power module further includes a buck chip model PL8310E, a resistor R16, a resistor R17, a resistor R18, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9 and an inductor L1. The buck chip is configured with a bootstrap terminal, an input terminal, an output terminal, a sampling terminal and a feedback terminal. The cathode of the diode D2 is connected to the input terminal of the buck chip, the sampling terminal of the buck chip is connected to the ground terminal, and the bootstrap terminal of the buck chip is successively connected to the capacitor C through the resistor R16. 6 is connected to the output end of the step-down chip, the output end of the step-down chip is connected to one end of the inductor L1, the other end of the inductor L1 is connected to the ground through the capacitor C7 and the capacitor C8, the resistor R17 is connected in parallel with the capacitor C7, and the resistor R18 is connected in parallel with the capacitor C8. The feedback end of the step-down chip is connected to the connection point between the capacitor C7 and the capacitor C8, one end of the capacitor C9 is connected to the connection point between the inductor L1 and the capacitor C7, and the other end of the capacitor C9 is connected to the ground.

[0011] The beneficial effects of the present utility model are as follows: the present technical solution arranges a plurality of laser transceivers on the range hood body, the main control module realizes the data transmission function between it and the laser transceiver through the 485 conversion module, and detects the gas concentration in the installation space of the range hood through the laser transceiver, with a wide detection range, accurate detection results and the ability to reflect the gas concentration in a larger space. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further explained below with reference to the accompanying drawings and specific implementation methods.

[0013] Figure 1 This is a circuit module framework diagram of the utility model;

[0014] Figure 2 This is the circuit diagram of the 485 conversion module in the utility model;

[0015] Figure 3 This is a circuit diagram of the power module in the utility model;

[0016] Figure 4 It is a circuit diagram of the motor drive module in the utility model. DETAILED DESCRIPTION

[0017] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0018] In the description of the utility model, if the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than and the like are understood as not including the number, above, below, within and the like are understood as including the number. If it is described to the first, the second is only used for distinguishing the purpose of technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0019] In the description of the utility model, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than and the like are understood as not including the number, above, below, within and the like are understood as including the number. If it is described to the first, the second is only used for distinguishing the purpose of technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0020] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection and the like should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the utility model combined with the specific content of the technical scheme.

[0021] Referring to Figures 1 to 4 The application discloses a range hood with gas leakage early warning function, which comprises a range hood body, a plurality of target areas are arranged at different positions of the outer end of the range hood, a laser transceiver is installed in the target area, a control circuit and a fan are installed in the range hood, the control circuit comprises a main control module, an early warning module, a 485 conversion module, a power module, a wireless communication module and a motor driving module, the power module is connected with the main control module, the early warning module, the 485 conversion module, the wireless communication module and the motor driving module respectively, the main control module is connected with the early warning module, the 485 conversion module, the wireless communication module and the motor driving module respectively, the motor driving module is connected with the fan, and the 485 conversion module is connected with the laser transceiver.

[0022] Specifically, in the embodiment, a plurality of laser transceivers are arranged on the range hood body, the main control module realizes the data transmission function with the laser transceivers through the 485 conversion module, the gas concentration in the installation space of the range hood is detected through the laser transceiver, the detection range is wide, the detection result is accurate and can reflect the gas concentration in a large space.

[0023] Further as a preferred implementation, in this embodiment, the angle between the outgoing light beam of the laser transceiver and the horizontal plane is greater than 45 degrees. This setting can prevent the outgoing light beam of the laser transceiver from being reflected after touching a person, thereby avoiding the inability to accurately detect the gas concentration in the space.

[0024] As a further preferred embodiment, in this embodiment, the 485 conversion module includes a conversion chip with a model number of 65LBC184, a varistor RA, a varistor RB, a varistor RC, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8 and a capacitor C1. The conversion chip is configured with a first input end, a second input end, a first output end and a second output end. The first output end of the conversion chip is connected to the power supply module through the resistor R1, the first output end of the conversion chip is connected to the laser transceiver through the resistor R2, the second output end of the conversion chip is connected to the ground end through the resistor R3, the second output end of the conversion chip is connected to the laser transceiver through the resistor R4, and one end of the resistor R5 is connected to the resistor R2 and the laser transceiver. The other end of the resistor R5 is connected to the connection point of the resistor R4 and the laser transceiver, the piezoresistor RA is connected in parallel with the resistor R5, one end of the piezoresistor RB is connected to the connection point of the resistor R4 and the laser transceiver, the other end of the piezoresistor RB is connected to the ground, one end of the piezoresistor RC is connected to the connection point of the resistor R2 and the laser transceiver, the other end of the piezoresistor RC is connected to the ground, the first input end of the conversion chip is connected to the main control module through the resistor R8, the second input end of the conversion chip is connected to the main control module through the resistor R7, the second input end of the conversion chip is connected to the power supply module through the resistor R6, one end of the capacitor C1 is connected to the connection point of the resistor R7 and the main control module, and the other end of the capacitor C1 is connected to the ground.

[0025] As a further preferred embodiment, in this embodiment, the power module includes a mains input terminal, an EMI filter, a rectifier, an input filter, a power chip model SP6645HF, a transformer, an output filter, a photocoupler, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a diode D1, a diode D2, a diode D3 and a voltage regulator D4. The power chip is configured with a power supply terminal, a feedback terminal, a sampling terminal and a driving terminal. The transformer is configured with a first winding LA, a second winding LA, a third winding LA, a fourth winding LA, a fifth ... The second winding LB and the third winding LC, the mains input end is connected to the EMI filter, the EMI filter is connected to the rectifier, the rectifier is connected to the input filter, the input filter is connected to one end of the first winding LA, the other end of the first winding LA is respectively connected to the positive electrode of the diode D1 and the driving end of the power chip, the negative electrode of the diode D1 is successively connected to the connection point of the input filter and the first winding LA through the resistor R9 and the capacitor C2, one end of the second winding LB is respectively connected to the positive electrode of the diode D2 and the capacitor C3 , the other end of the capacitor C3 is connected to the cathode of the diode D2 through the resistor R10, the cathode of the diode D2 is connected to the output filter, the other end of the second winding LB is connected to the ground, one end of the resistor R14 is connected to the cathode of the diode D2, the other end of the resistor R14 is connected to the cathode of the voltage regulator D4 through the resistor R15, the positive electrode of the voltage regulator D4 is connected to the ground, the anode input end of the photocoupler is connected to the connection point of the resistor R14 and the resistor R15, and the cathode input end of the photocoupler is connected to the cathode of the voltage regulator D4 The emitter of the photoelectric coupler is connected to the ground, the collector of the photoelectric coupler is connected to the feedback end of the power supply chip, the feedback end of the power supply chip is connected to the ground through the capacitor C4, the sampling end of the power supply chip is connected to the ground through the resistor R11, one end of the tertiary winding LC is connected to the ground, the other end of the tertiary winding LC is connected to the anode of the diode D3, the cathode of the diode D3 is connected to the ground through the resistor R12, the resistor R13 and the capacitor C5 in sequence, and the power end of the power supply chip is connected to the connection point of the resistor R13 and the capacitor C5.

[0026] As a further preferred embodiment, in this embodiment, the power module further includes a step-down chip model PL8310E, a resistor R16, a resistor R17, a resistor R18, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9 and an inductor L1, the step-down chip is configured with a bootstrap terminal, an input terminal, an output terminal, a sampling terminal and a feedback terminal, the cathode of the diode D2 is connected to the input terminal of the step-down chip, the sampling terminal of the step-down chip is connected to the ground terminal, the bootstrap terminal of the step-down chip is successively connected to the resistor R16 and the capacitor C7, the output terminal, the sampling terminal and the feedback terminal, the cathode of the diode D2 is connected to the input terminal of the step-down chip, the sampling terminal of the step-down chip is connected to the ground terminal, and the bootstrap terminal of the step-down chip is successively connected to the capacitor C7 through the resistor R16 and the feedback terminal. Capacitor C6 is connected to the output end of the step-down chip, the output end of the step-down chip is connected to one end of the inductor L1, the other end of the inductor L1 is connected to the ground through the capacitor C7 and the capacitor C8, the resistor R17 is connected in parallel with the capacitor C7, and the resistor R18 is connected in parallel with the capacitor C8. The feedback end of the step-down chip is connected to the connection point between the capacitor C7 and the capacitor C8, one end of the capacitor C9 is connected to the connection point between the inductor L1 and the capacitor C7, and the other end of the capacitor C9 is connected to the ground.

[0027] As a further preferred embodiment, in this embodiment, the motor drive module includes a driver chip model FU6862L and three drive units, the drive unit includes an NPN transistor Q1, an NPN transistor Q2, a resistor R19, a resistor R20, a resistor R21, a resistor R22, a resistor R23, a resistor R24, a resistor R25, a diode D4 and a diode D5, the driver chip is communicatively connected to the main control module, one output end of the driver chip is respectively connected to the cathode of the diode D4 and one end of the resistor R19, the other end of the resistor R19 is connected to the base of the transistor Q1, and the base of the transistor Q1 is connected to its emitter through the resistor R21, so The anode of the diode D4 is connected to the base of the transistor Q1 through the resistor R20, the collector of the transistor Q1 is connected to the power module, the other output end of the driver chip is respectively connected to the cathode of the diode D5 and one end of the resistor R22, the other end of the resistor R22 is connected to the base of the transistor Q2, the base of the transistor Q2 is connected to its emitter through the resistor R24, the anode of the diode D5 is connected to the base of the transistor Q2 through the resistor R23, the collector of the transistor Q2 is connected to the emitter of the transistor Q1, the emitter of the transistor Q2 is connected to the ground through the resistor R25, and the emitter of the transistor Q1 is connected to the fan.

[0028] The above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A range hood with a gas leak warning function, characterized by: The range hood comprises a main body, wherein a plurality of target areas are provided at different positions of the outer end of the range hood, a laser transceiver is installed in the target area, a control circuit and a fan are installed inside the range hood, the control circuit comprises a main control module, an early warning module, a 485 conversion module, a power supply module, a wireless communication module and a motor drive module, the power supply module is respectively connected to the main control module, the early warning module, the 485 conversion module, the wireless communication module and the motor drive module, the main control module is respectively connected to the early warning module, the 485 conversion module, the wireless communication module and the motor drive module, the motor drive module is connected to the fan, and the 485 conversion module is connected to the laser transceiver.

2. The range hood with gas leak warning function according to claim 1, characterized in that: The angle between the light beam of the laser transceiver and the horizontal plane is greater than 45 degrees.

3. The range hood with gas leak warning function according to claim 1, characterized in that: The 485 conversion module includes a conversion chip with a model number of 65LBC184, a varistor RA, a varistor RB, a varistor RC, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8 and a capacitor C1. The conversion chip is configured with a first input end, a second input end, a first output end and a second output end. The first output end of the conversion chip is connected to the power module through the resistor R1, the first output end of the conversion chip is connected to the laser transceiver through the resistor R2, the second output end of the conversion chip is connected to the ground end through the resistor R3, the second output end of the conversion chip is connected to the laser transceiver through the resistor R4, one end of the resistor R5 is connected to the connection point between the resistor R2 and the laser transceiver, and the resistor R5 is connected to the ground end. The other end of the resistor R5 is connected to the connection point between the resistor R4 and the laser transceiver, the varistor RA is connected to the resistor R5 in parallel, one end of the varistor RB is connected to the connection point between the resistor R4 and the laser transceiver, and the other end of the varistor RB is connected to the ground, one end of the varistor RC is connected to the connection point between the resistor R2 and the laser transceiver, and the other end of the varistor RC is connected to the ground, the first input end of the conversion chip is connected to the main control module through the resistor R8, the second input end of the conversion chip is connected to the main control module through the resistor R7, and the second input end of the conversion chip is connected to the power supply module through the resistor R6. One end of the capacitor C1 is connected to the connection point between the resistor R7 and the main control module, and the other end of the capacitor C1 is connected to the ground.

4. The range hood with a gas leak warning function according to claim 1, characterized in that: The power module includes a mains input terminal, an EMI filter, a rectifier, an input filter, a power chip model SP6645HF, a transformer, an output filter, an optocoupler, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a diode D1, a diode D2, a diode D3 and a voltage regulator D4. The power chip is configured with a power supply terminal, a feedback terminal, a sampling terminal and a driving terminal. The transformer is configured with a first winding LA, a second winding LB and a third winding LC. The mains input end is connected to the EMI filter, the EMI filter is connected to the rectifier, the rectifier is connected to the input filter, the input filter is connected to one end of the first winding LA, the other end of the first winding LA is respectively connected to the positive electrode of the diode D1 and the driving end of the power chip, the cathode of the diode D1 is successively connected to the connection point between the input filter and the first winding LA through the resistor R9 and the capacitor C2, one end of the second winding LB is respectively connected to the positive electrode of the diode D2 and one end of the capacitor C3, the The other end of the capacitor C3 is connected to the cathode of the diode D2 through the resistor R10, the cathode of the diode D2 is connected to the output filter, the other end of the second winding LB is connected to the ground, one end of the resistor R14 is connected to the cathode of the diode D2, the other end of the resistor R14 is connected to the cathode of the voltage regulator tube D4 through the resistor R15, the anode of the voltage regulator tube D4 is connected to the ground, the anode input end of the photocoupler is connected to the connection point between the resistor R14 and the resistor R15, and the cathode input end of the photocoupler is connected to the cathode of the voltage regulator tube D4. The emitter of the photoelectric coupler is connected to the ground terminal, the collector of the photoelectric coupler is connected to the feedback terminal of the power supply chip, the feedback terminal of the power supply chip is connected to the ground terminal through the capacitor C4, the sampling terminal of the power supply chip is connected to the ground terminal through the resistor R11, one end of the third winding LC is connected to the ground terminal, the other end of the third winding LC is connected to the positive electrode of the diode D3, the negative electrode of the diode D3 is connected to the ground terminal through the resistor R12, the resistor R13 and the capacitor C5 in sequence, and the power supply terminal of the power supply chip is connected to the connection point of the resistor R13 and the capacitor C5.

5. The range hood with gas leakage warning function according to claim 4, characterized in that: The power module also includes a buck chip model PL8310E, a resistor R16, a resistor R17, a resistor R18, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9 and an inductor L1. The buck chip is configured with a bootstrap terminal, an input terminal, an output terminal, a sampling terminal and a feedback terminal. The cathode of the diode D2 is connected to the input terminal of the buck chip, the sampling terminal of the buck chip is connected to the ground terminal, and the bootstrap terminal of the buck chip is connected to the buck chip through the resistor R16 and the capacitor C6 in sequence. The output end of the step-down chip is connected to one end of the inductor L1, the other end of the inductor L1 is connected to the ground through the capacitor C7 and the capacitor C8 in sequence, the resistor R17 is connected in parallel with the capacitor C7, the resistor R18 is connected in parallel with the capacitor C8, the feedback end of the step-down chip is connected to the connection point between the capacitor C7 and the capacitor C8, one end of the capacitor C9 is connected to the connection point between the inductor L1 and the capacitor C7, and the other end of the capacitor C9 is connected to the ground.

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