A method for calibrating the linkage distance between a range hood and a gas stove

Abstract

The application provides a linkage distance calibration method for an extractor hood and a gas stove, which increases the PWM duty ratio in an incremental manner; each time the PWM duty ratio is increased, the gas stove sends a data frame to the extractor hood, and the gas stove receives the data frame number fed back by the extractor hood; the reception rate between the received data frame number and the sent data frame is calculated; when the reception rate is less than a preset ratio, the PWM duty ratio is continuously increased, and the reception rate is calculated again; when the reception rate is greater than or equal to the preset ratio, the calibration is completed; the power consumption is reduced when the gas stove is linked with the extractor hood, and the service life of the battery is prolonged.

Description

Technical Field

[0001] This invention relates to the technical field of household appliances, and in particular to a method for calibrating the linkage distance between a range hood and a gas stove. Background Technology

[0002] The range hood and gas stove are linked and controlled by an RF module. For example, the range hood starts when the gas stove starts and stops working when the gas stove is turned off, realizing the automatic start and stop of the range hood. In different usage scenarios, the distance between the range hood and the gas stove is different. In order to ensure the linkage distance and successful pairing, the maximum transmission power of the RF module is often increased during production. This requires high precision of the device and low production efficiency.

[0003] At the same time, excessively high transmission power will significantly increase power consumption and shorten battery life; in addition, a fixed high power cannot fully adapt to the diverse kitchen layouts of users, such as different installation distances of range hoods and stoves or wall obstructions, which may still lead to linkage failures or instability, affecting the user experience. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a method for calibrating the linkage distance between a range hood and a gas stove, so as to reduce power consumption and extend battery life while ensuring linkage between the gas stove and the range hood.

[0005] To solve the above-mentioned technical problems, the technical solution used in this invention is as follows:

[0006] The present invention discloses a method for calibrating the linkage distance between a range hood and a gas stove. The gas stove includes an adjustable voltage RF module, which includes a PWM control module and an oscillation module. The PWM control module is used to adjust the voltage input to the oscillation module.

[0007] The calibration method includes the following steps:

[0008] S1. Increase the PWM duty cycle incrementally.

[0009] S2. Each time the PWM duty cycle is increased, the gas stove sends M data frames to the range hood, and the gas stove receives N data frames from the range hood.

[0010] S3. Calculate the data frame reception rate Rate = N / M.

[0011] S4. Determine whether the data frame reception rate is greater than or equal to the preset ratio. If yes, complete the calibration; otherwise, proceed to S5.

[0012] S5. Repeat S1-S4 until the data frame reception rate is greater than or equal to the preset ratio.

[0013] Preferably, S1 is a preset single adjustment increment of the PWM duty cycle; each time, the PWM duty cycle is gradually increased by the single adjustment increment.

[0014] Preferably, S5 further includes determining whether the PWM duty cycle is greater than or equal to 100% when the data frame reception rate is less than a preset ratio; if yes, then the adjustable voltage RF module is determined to be abnormal; if no, then S6 is performed.

[0015] Preferably, the number M of data frames M sent from the gas stove to the range hood is a fixed value.

[0016] Preferably, the adjustable voltage RF module includes a filter module connected to a PWM control module, which is used to suppress high-frequency harmonic interference; S1 also includes setting the PWM frequency according to the cutoff frequency of the filter module.

[0017] Preferably, the adjustable voltage RF module includes a signal input and modulation module and a transmitting module; the PWM control module and the oscillation module are connected to the signal input and modulation module, the PWM control module is connected to the oscillation module through the filtering module, and the transmitting module is connected to the oscillation module and the filtering module;

[0018] The signal input and modulation module is used to introduce external data signals into the adjustable voltage RF module, the oscillation module is used to generate radio frequency signals, and the transmission module is used to transmit radio frequency signals.

[0019] Preferably, the PWM control module includes a pull-up resistor R5, a current-limiting resistor R6, and a transistor T2; the filtering module includes a capacitor C2 and an inductor L2; the signal input and modulation module includes a power terminal H1, a base current-limiting resistor R1, and a base pull-down resistor R2; the oscillation module includes a resistor R3, a transistor T1, and a resonator X1; and the transmitting module includes a damping resistor R4, a capacitor C1, a capacitor C3, a capacitor C4, an inductor L1, and an antenna interface ANT.

[0020] The VCC terminal of the power terminal H1 is connected to the emitter of the transistor T2. The base of the transistor T2 is connected to the PWM terminal of the power terminal H1 through the current-limiting resistor R6. The pull-up resistor R5 connects the VCC terminal and the PWM terminal of the power terminal H1.

[0021] The collector of transistor T2 is connected to one end of capacitor C2 and one end of inductor L2. The other end of capacitor C2 is grounded. The other end of inductor L2 is connected to the collector of transistor T1. The emitter of transistor T1 is grounded through resistor R3. The base of transistor T1 is connected to the DATA terminal of terminal H1 through base current limiting resistor R1. The base of transistor T1 is also connected to one end of base pull-down resistor R2 and the OUT terminal of resonator X1. The other end of base pull-down resistor R2 is grounded. The IN and GND terminals of resonator X1 are grounded. The GND terminal of terminal H1 is grounded.

[0022] The collector of transistor T2 is also connected to one end of inductor L1 and one end of capacitor C4. The other end of capacitor C4 is connected to the emitter of transistor T2. The other end of capacitor C4 is also grounded through capacitor C3. The other end of inductor L1 is connected through one end of capacitor C1. One end of capacitor C1 is connected to the antenna interface ANT. The other end of capacitor C1 is also grounded through damping resistor R4.

[0023] Compared with the prior art, the beneficial effects of the method for calibrating the linkage distance between a range hood and a gas stove described in this invention are mainly reflected in the following aspects: the transmission power of the adjustable voltage RF module is related to the voltage, and the transmission power of the adjustable voltage RF module is increased by increasing the voltage; the power is gradually increased in an incremental manner, and the transmission power of the adjustable voltage RF module is no longer increased after the linkage between the gas stove and the range hood is achieved. Thus, while ensuring the linkage between the gas stove and the range hood, power consumption is reduced, the battery life is extended, and the maximum transmission power can be reduced during production, reducing accuracy requirements and improving production efficiency. Attached Figure Description

[0024] The above and other objects, features, and advantages of the invention will become clearer through a more detailed description of the preferred embodiments illustrated in the accompanying drawings. The same reference numerals denote the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of the invention.

[0025] Figure 1 This is a flowchart of the present invention.

[0026] Figure 2 This is the circuit schematic of an adjustable voltage RF module.

[0027] Explanation of icon numbers:

[0028] Adjustable voltage RF module 1, PWM control module 11, filtering module 12, oscillation module 13, signal input and modulation module 14, and transmission module 15. Detailed Implementation

[0029] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention. In this embodiment, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0030] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to and integrated with the other element, or there may be an intervening element present. The terms "mounted," "one end," "the other end," and similar expressions used in this invention are for illustrative purposes only.

[0031] like Figure 1-2 As shown, a method for calibrating the linkage distance between a range hood and a gas stove is disclosed. The gas stove includes an adjustable voltage RF module 1, which includes a PWM control module 11, a filter module 12, an oscillation module 13, a signal input and modulation module 14, and a transmission module 15. The PWM control module 11 and the oscillation module 13 are connected to the signal input and modulation module 14. The PWM control module 11 is connected to the oscillation module through the filter module 12. The transmission module 15 is connected to the oscillation module 13 and the filter module 12.

[0032] The signal input and modulation module 14 is used to introduce external data signals into the adjustable voltage RF module 1, the oscillation module 13 is used to generate radio frequency signals, the transmission module 15 is used to transmit radio frequency signals, the PWM control module 11 is used to adjust the voltage input to the oscillation module 13, and the filtering module 12 is used to suppress high-frequency harmonic interference.

[0033] The PWM control module 11 includes a pull-up resistor R5, a current-limiting resistor R6, and a transistor T2; the filter module 12 includes a capacitor C2 and an inductor L2; the signal input and modulation module 14 includes a power terminal H1, a base current-limiting resistor R1, and a base pull-down resistor R2; the oscillation module 13 includes a resistor R3, a transistor T1, and a resonator X1; and the transmitting module 15 includes a damping resistor R4, a capacitor C1, a capacitor C3, a capacitor C4, an inductor L1, and an antenna interface ANT.

[0034] The VCC terminal of the power terminal H1 is connected to the emitter of the transistor T2. The base of the transistor T2 is connected to the PWM terminal of the power terminal H1 through the current-limiting resistor R6. The pull-up resistor R5 connects the VCC terminal and the PWM terminal of the power terminal H1.

[0035] The collector of transistor T2 is connected to one end of capacitor C2 and one end of inductor L2. The other end of capacitor C2 is grounded. The other end of inductor L2 is connected to the collector of transistor T1. The emitter of transistor T1 is grounded through resistor R3. The base of transistor T1 is connected to the DATA terminal of terminal H1 through base current limiting resistor R1. The base of transistor T1 is also connected to one end of base pull-down resistor R2 and the OUT terminal of resonator X1. The other end of base pull-down resistor R2 is grounded. The IN and GND terminals of resonator X1 are grounded. The GND terminal of terminal H1 is grounded.

[0036] The collector of transistor T2 is also connected to one end of inductor L1 and one end of capacitor C4. The other end of capacitor C4 is connected to the emitter of transistor T2. The other end of capacitor C4 is also grounded through capacitor C3. The other end of inductor L1 is connected through one end of capacitor C1. One end of capacitor C1 is connected to the antenna interface ANT. The other end of capacitor C1 is also grounded through damping resistor R4.

[0037] In the signal input and modulation module 14, the VCC terminal of terminal H1 is used for power input, and the PWM terminal of terminal H1 is used to send pulse signals to the PWM control module 11, thereby controlling the voltage output from the emitter of transistor T2. The DATA terminal of terminal H1 is used to introduce external data signals and control the on and off of the radio frequency signals.

[0038] The base current limiting resistor R1 is connected in series between the DATA terminal of terminal H1 and the base of transistor T1. It does not block digital level signals, and the DATA signal can pass through the base current limiting resistor R1 to the base of transistor T1. At the same time, the base current limiting resistor R1 is used to limit the current at the base of transistor T1 to prevent excessive current from damaging transistor T1.

[0039] The base pull-down resistor R2 is used to keep the base of transistor T1 at a low level when there is no DATA signal input, thus turning off transistor T1 and preventing false triggering.

[0040] In the PWM control module 11, transistor T2, together with pull-up resistor R5 and current-limiting resistor R6, forms a voltage regulator circuit. The PWM signal controls the reference voltage at the base of transistor T2, thereby controlling the voltage output from the emitter of transistor T2. The constant voltage input to the VCC terminal of terminal H1 is reduced and stabilized to a voltage value suitable for the operation of transistor T1.

[0041] In the filter module 12, capacitor C2 is a power supply filter capacitor that filters out high-frequency noise in the power supply, prevents power fluctuations from affecting the oscillation frequency, and improves frequency stability; inductor L2 is an RF choke that prevents RF signals from leaking back to the power supply terminal through the power line, and at the same time provides DC power to the collector of transistor T1.

[0042] In oscillation module 13, transistor T1 is used to generate oscillation and amplify the signal; resonator X1 oscillates at a frequency of 433.92MHz to ensure extremely accurate transmission frequency without drift; resistor R3 provides DC negative feedback to prevent excessive current from damaging transistor T1. Transistor T1, resonator X1, and resistor R3 together form an oscillator that generates a stable 433.92MHz high-frequency carrier wave.

[0043] In the transmitting module 15, inductor L1, capacitor C4, and capacitor C3 convert the high impedance of the collector of transistor T1 into the impedance required by the antenna, ensuring maximum power output while filtering out unwanted high-order harmonics. Capacitor C1 is a DC blocking capacitor, allowing high-frequency AC signals to pass through while preventing DC current from entering the antenna. The antenna interface ANT is used to connect the physical antenna, converting electrical signals into electromagnetic waves for radiation.

[0044] In the above circuit, the external power supply, regulated by transistor T2, provides a stable voltage for the oscillation circuit. The voltage magnitude is controlled by PWM. The oscillator, composed of transistor T1, resonator X1, and resistor R3, generates a 433.92MHz high-frequency carrier wave. When the DATA pin input is high, transistor T1 conducts, transmitting the RF signal; when the input is low, transistor T1 is cut off, stopping transmission. The modulated high-frequency signal passes through a matching network of inductor L1, capacitor C3, and capacitor C4, and is coupled to antenna ANT through capacitor C1, ultimately being transmitted.

[0045] The calibration method includes the following steps:

[0046] S1. Set the PWM frequency according to the cutoff frequency of the filter module 12; increase the PWM duty cycle in an incremental manner.

[0047] S2. Each time the PWM duty cycle is increased, the gas stove sends M data frames to the range hood, and the gas stove receives N data frames from the range hood. Specifically, the gas stove sends M data frames to the range hood, the range hood counts the received data frames N, and feeds back the number of data frames N to the gas stove.

[0048] S3. Calculate the data frame reception rate Rate = N / M.

[0049] S4. Determine whether the data frame reception rate is greater than or equal to a preset ratio. If yes, complete the calibration; if no, determine whether the PWM duty cycle is greater than or equal to 100%. If yes, determine that the adjustable voltage RF module 1 is abnormal; if no, proceed to S5. Preferably, the preset ratio is 90%.

[0050] S5. Repeat S1-S4 until the data frame reception rate is greater than or equal to the preset ratio, and then proceed to S6.

[0051] S6. Save the current PWM duty cycle parameters.

[0052] In the above circuit, the transmission power of the adjustable voltage RF module 1 is related to the voltage. By increasing the voltage, the transmission power of the adjustable voltage RF module 1 is increased. The power is gradually increased in an incremental manner. After the gas stove and the range hood are linked, the transmission power of the adjustable voltage RF module 1 is no longer increased. This ensures the linkage between the gas stove and the range hood while reducing power consumption and extending battery life. At the same time, the maximum transmission power can be reduced during production, reducing accuracy requirements and improving production efficiency.

[0053] The cutoff frequency Determined by capacitor C2 and inductor L2 The PWM frequency is 1 / 10 to 1 / 20 of the cutoff frequency. In this embodiment, the PWM frequency is 1 / 10 of the cutoff frequency. This effectively suppresses high-frequency harmonic interference.

[0054] In the above method,

[0055] S1 specifically refers to the preset single-cycle adjustment increment of the PWM duty cycle; the PWM duty cycle is gradually increased by the single-cycle adjustment increment each time. The single-cycle adjustment increment can be 1%, 3%, or 5%, and in this embodiment, the single-cycle adjustment increment is 1%.

[0056] The PWM duty cycle increases consistently with each increment, the power supply voltage rises linearly and smoothly, the transmission power increases slowly without sudden spikes, and the transmission power gradually increases, making it less prone to instantaneous strong signal interference. This improves the stability of the range hood and gas stove signal pairing and gradually expands the signal coverage. Once the range hood and gas stove are successfully linked, the incremental adjustment stops immediately, locking in the optimal transmission power for energy saving and consumption reduction.

[0057] In S2, the number of data frames M sent by the gas stove to the range hood is a fixed value. This allows for accurate calculation of the reception rate between the number of received data frames and the number of sent data frames.

[0058] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0059] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0060] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for calibrating the linkage distance between a range hood and a gas stove, characterized in that: The gas stove includes an adjustable voltage RF module, which includes a PWM control module and an oscillation module. The PWM control module is used to adjust the voltage input to the oscillation module. The calibration method includes the following steps: S1. Increase the PWM duty cycle incrementally; S2. Each time the PWM duty cycle is increased, the gas stove sends M data frames to the range hood, and the gas stove receives N data frames from the range hood. S3. Calculate the data frame reception rate Rate = N / M; S4. Determine whether the data frame reception rate is greater than or equal to the preset ratio. If yes, complete the calibration; otherwise, proceed to S5. S5. Repeat S1-S4 until the data frame reception rate is greater than or equal to the preset ratio.

2. The method for calibrating the linkage distance between the range hood and the gas stove according to claim 1, characterized in that: S1 is specifically the single-time adjustment increment of the preset PWM duty cycle; each time, the PWM duty cycle is gradually increased by the single-time adjustment increment.

3. The method for calibrating the linkage distance between the range hood and the gas stove according to claim 1, characterized in that: S5 also includes determining whether the PWM duty cycle is greater than or equal to 100% when the data frame reception rate is less than a preset ratio; if so, then determining that the adjustable voltage RF module is abnormal. If not, proceed to S6.

4. The method for calibrating the linkage distance between the range hood and the gas stove according to claim 1, characterized in that: The number of data frames M sent from the gas stove to the range hood is a fixed value.

5. The method for calibrating the linkage distance between the range hood and the gas stove according to claim 1, characterized in that: The adjustable voltage RF module includes a filter module, which is connected to the PWM control module. The filter module is used to suppress high-frequency harmonic interference. S1 also includes setting the PWM frequency according to the cutoff frequency of the filter module.

6. The method for calibrating the linkage distance between the range hood and the gas stove according to claim 5, characterized in that: The adjustable voltage RF module includes a signal input and modulation module and a transmission module; the PWM control module and the oscillation module are connected to the signal input and modulation module, the PWM control module is connected to the oscillation module through the filter module, and the transmission module is connected to the oscillation module and the filter module. The signal input and modulation module is used to introduce external data signals into the adjustable voltage RF module, the oscillation module is used to generate radio frequency signals, and the transmission module is used to transmit radio frequency signals.

7. The method for calibrating the linkage distance between the range hood and the gas stove according to claim 6, characterized in that: The PWM control module includes a pull-up resistor R5, a current-limiting resistor R6, and a transistor T2; the filtering module includes a capacitor C2 and an inductor L2; the signal input and modulation module includes a power terminal H1, a base current-limiting resistor R1, and a base pull-down resistor R2; the oscillation module includes a resistor R3, a transistor T1, and a resonator X1; the transmitting module includes a damping resistor R4, a capacitor C1, a capacitor C3, a capacitor C4, an inductor L1, and an antenna interface ANT. The VCC terminal of the power terminal H1 is connected to the emitter of the transistor T2. The base of the transistor T2 is connected to the PWM terminal of the power terminal H1 through the current limiting resistor R6. The pull-up resistor R5 is connected between the VCC terminal and the PWM terminal of the power terminal H1. The collector of transistor T2 is connected to one end of capacitor C2 and one end of inductor L2. The other end of capacitor C2 is grounded. The other end of inductor L2 is connected to the collector of transistor T1. The emitter of transistor T1 is grounded through resistor R3. The base of transistor T1 is connected to the DATA terminal of terminal H1 through base current limiting resistor R1. The base of transistor T1 is also connected to one end of base pull-down resistor R2 and the OUT terminal of resonator X1. The other end of base pull-down resistor R2 is grounded. The IN and GND terminals of resonator X1 are grounded. The GND terminal of terminal H1 is grounded. The collector of transistor T2 is also connected to one end of inductor L1 and one end of capacitor C4. The other end of capacitor C4 is connected to the emitter of transistor T2. The other end of capacitor C4 is also grounded through capacitor C3. The other end of inductor L1 is connected through one end of capacitor C1. One end of capacitor C1 is connected to the antenna interface ANT. The other end of capacitor C1 is also grounded through damping resistor R4.

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