Infrared detection circuit, infrared control circuit and fan

Abstract

The invention discloses an infrared detection circuit, an infrared control circuit and a fan. The infrared detection circuit is applied to the fan and comprises a signal receiving circuit, a differential amplification circuit and a peak voltage maintaining circuit, and the signal receiving circuit is used for receiving remote control signals of the fan and filtering the remote control signals; the differential amplification circuit is connected with the signal receiving circuit and is used for receiving and amplifying the filtered remote control signal; the peak voltage maintaining circuit is connected with the differential amplification circuit, receives the amplified remote control signal and carries out peak maintaining processing so as to obtain a remote control analog signal. By means of the mode, the infrared detection circuit can filter infrared interference in the environment, the remote control signal is amplified, peak value maintaining processing is carried out, the remote control signal is converted into a stable and smooth remote control analog signal, and then the precision and accuracy of the infrared detection circuit on remote control signal detection are improved.

Description

Technical Field

[0001] The present application relates to the field of infrared control technology, and in particular to an infrared detection circuit, an infrared control circuit and a fan. Background Art

[0002] When using a fan, if the user wants the fan to blow towards the person, there are several ways. The most direct way is to manually operate the shaking button. The second way is to use the remote control and select a fixed angle and press the stop shaking button during the natural shaking of the fan. These two methods are complicated to operate, inefficient and have poor user experience.

[0003] In the prior art, most fans are controlled by remote control signals. However, the remote control signals emitted by the existing remote controls are weak and easily affected by environmental interference. Furthermore, since the signals emitted by the remote controls are square wave digital signals with a fast signal frequency, the control center may not be able to detect the infrared signals of the remote controls, resulting in poor control effects of the remote controls and affecting the user experience. Summary of the invention

[0004] The present application proposes an infrared detection circuit, an infrared control circuit and a fan, aiming to solve the above-mentioned problems.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide an infrared detection circuit, which includes a signal receiving circuit, a differential amplifier circuit and a peak voltage maintenance circuit. The signal receiving circuit is used to receive the remote control signal of the fan and filter the remote control signal; the differential amplifier circuit is connected to the signal receiving circuit, receives the filtered remote control signal and amplifies it; the peak voltage maintenance circuit is connected to the differential amplifier circuit, receives the amplified remote control signal and performs peak maintenance processing to obtain a remote control analog signal.

[0006] Among them, the peak voltage maintenance circuit includes a diode, a first capacitor and a first resistor. The input end of the diode is connected to the differential amplifier circuit to receive the amplified remote control signal; the first end of the first capacitor is connected to the output end of the diode, and the second end of the first capacitor is grounded; the first end of the first resistor is connected to the output end of the diode, and the second end of the first resistor is grounded; wherein the connection end of the first resistor and the diode serves as the output end of the peak voltage maintenance circuit to output the remote control analog signal.

[0007] Among them, the signal receiving circuit includes a second resistor and a sensor component, the first end of the second resistor receives a preset voltage signal; the first path end of the sensor component is connected to the second end of the second resistor, the second path end of the sensor component is grounded, and the signal receiving end of the sensor component receives the remote control signal of the fan; wherein the connection end of the second resistor and the sensor component serves as the output end of the signal receiving circuit to output the remote control signal.

[0008] The signal receiving circuit further includes a filter component, a first end of the filter component is connected to the connection end of the second resistor and the sensor component, a second end of the filter component is connected to the differential amplifier circuit, and the filter component is used to filter the remote control signal.

[0009] The filter component includes a second capacitor, a first end of the second capacitor is connected to the connection end of the second resistor and the sensor component, and a second end of the second capacitor is connected to the differential amplifier circuit.

[0010] The differential amplifier circuit includes a comparison circuit, a first input terminal of the comparison circuit is connected to the signal receiving circuit, and a second input terminal of the comparison circuit receives a reference signal; it is used to receive the filtered remote control signal; and the output terminal of the comparison circuit is used to output the amplified remote control signal.

[0011] To solve the above technical problems, another technical solution adopted in the present application is: to provide an infrared control circuit, which includes a plurality of infrared detection circuits and receiving circuits of any one of the above items, and the receiving circuit is used to identify the remote control signal and decode the remote control signal to obtain a decoded signal.

[0012] Among them, the receiving circuit includes a receiver component, a third resistor, a fourth resistor, a fifth resistor and a third capacitor, the receiver component is used to receive a remote control signal; the first end of the third resistor receives a preset voltage signal, and the second end of the third resistor is connected to the power input end of the receiver component; the first end of the fourth resistor receives a preset voltage signal, and the second end of the fourth resistor is connected to the output end of the receiver component; the first end of the fifth resistor is connected to the output end of the receiver component and the second end of the fourth resistor, and the second end of the fifth resistor serves as the output end of the receiving circuit to output a decoding signal; one end of the third capacitor is grounded, and the second end of the third capacitor is connected to the second end of the fifth resistor.

[0013] In order to solve the above-mentioned technical problems, another technical solution adopted in the present application is: to provide a fan, which includes an air supply mechanism, an shaking head mechanism and a controller, the shaking head mechanism is connected to the air supply mechanism, and the shaking head mechanism is provided with any one of the above-mentioned infrared control circuits; wherein, a plurality of infrared detection circuits are arranged on the shaking head mechanism, and the receiving circuit is provided on the shaking head mechanism; the controller is connected to the shaking head mechanism, the air supply mechanism and the infrared control circuit, and is used to control the shaking head mechanism and the air supply mechanism to supply air based on the remote control analog signals of the plurality of infrared detection circuits and the decoding signals of the receiving circuit.

[0014] Among them, the controller is also used to determine whether the decoded signal is a preset fixed code value. If the decoded signal is a preset fixed code value, the controller controls the shaking head mechanism and the air supply mechanism to supply air based on the remote control analog signal. If the decoded signal is not a preset fixed code value, the controller controls the shaking head mechanism and the air supply mechanism to stop working.

[0015] The beneficial effects of the present application are as follows: Different from the prior art, the infrared detection circuit of the present application is applied to the fan, and the infrared detection circuit includes a signal receiving circuit, a differential amplifier circuit and a peak voltage maintenance circuit, the signal receiving circuit is used to receive the remote control signal of the fan and filter the remote control signal; the differential amplifier circuit is connected to the signal receiving circuit, receives the filtered remote control signal and amplifies it; the peak voltage maintenance circuit is connected to the differential amplifier circuit, receives the amplified remote control signal and performs peak maintenance processing to obtain the remote control analog signal. In the above manner, the infrared detection circuit of the present application can filter out the infrared interference in the received environment through the receiving circuit, and amplify the remote control signal by using the differential amplifier circuit, and finally perform peak maintenance processing on the amplified remote control signal by using the peak voltage maintenance circuit to convert the remote control signal into a stable and smooth remote control analog signal. Therefore, the infrared detection circuit of the present application reduces the interference of the environment to the infrared detection circuit, and uses the peak voltage position circuit to make the remote control signal become a stable and smooth remote control analog signal, which is easy to be detected by the controller, thereby improving the precision and accuracy of the infrared detection circuit in detecting the remote control signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present application and are used together with the specification to illustrate the technical solution of the present application.

[0017] Figure 1 It is a structural schematic diagram of the first embodiment of the infrared detection circuit of the present application;

[0018] Figure 2 It is a circuit structure diagram of the second embodiment of the infrared detection circuit of the present application;

[0019] Figure 3 is a circuit structure diagram of the third embodiment of the infrared detection circuit of the present application;

[0020] Figure 4 is a circuit structure diagram of a fourth embodiment of the infrared detection circuit of the present application;

[0021] Figure 5 It is a structural schematic diagram of an embodiment of the infrared control circuit of the present application;

[0022] Figure 6 It is a structural schematic diagram of the first embodiment of the fan of the present application;

[0023] Figure 7 It is a structural schematic diagram of the second embodiment of the fan of the present application;

[0024] Figure 8 It is a schematic diagram of an embodiment of the sensor installation position of the present application.

[0025] Marking description: infrared detection circuit 100, signal receiving circuit 10, sensor component 11, filter component 12, second resistor R2, second capacitor C2, differential amplifier circuit 20, comparison circuit 21, sixth resistor R6, seventh resistor R7, eighth resistor R8, ninth resistor R9, tenth resistor R10, fourth capacitor C4, peak voltage maintaining circuit 30, diode D1, first capacitor C1, first resistor R1, infrared control circuit 200, receiving circuit 110, receiver component 111, third resistor R3, fourth resistor R4, fifth resistor R5, third capacitor C3, fan 300, air supply mechanism 210, shaking mechanism 220, controller 230, chassis fixing structure 240, sensor mounting part 250. DETAILED DESCRIPTION

[0026] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0028] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0029] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0031] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0032] When using a fan, if the user wants the fan to blow towards the person, there are several ways. The most direct way is to manually operate the shaking button. The second way is to use the remote control and select a fixed angle and press the stop shaking button during the natural shaking of the fan. These two methods are complicated to operate, inefficient and have poor user experience.

[0033] In the prior art, most fans are controlled by remote control signals. However, the remote control signals emitted by the existing remote controls are weak and easily affected by environmental interference. Furthermore, since the signals emitted by the remote controls are square wave digital signals with a fast signal frequency, the control center may not be able to detect the infrared signals of the remote controls, resulting in poor control effects of the remote controls and affecting the user experience.

[0034] In order to solve the above problems, the present application first proposes an infrared detection circuit. Figure 1 , Figure 1 Schematic diagram of the structure of the first embodiment of the infrared detection circuit of the present application. Figure 1 As shown, the infrared detection circuit 100 of the present embodiment includes a signal receiving circuit 10 , a differential amplifier circuit 20 and a peak voltage maintaining circuit 30 .

[0035] Among them, the signal receiving circuit 10 is used to receive the remote control signal of the fan and filter the remote control signal; the differential amplifier circuit 20 is connected to the signal receiving circuit 10, receives the filtered remote control signal and amplifies it; the peak voltage maintenance circuit 30 is connected to the differential amplifier circuit 20, receives the amplified remote control signal and performs peak maintenance processing to obtain a remote control analog signal.

[0036] In this embodiment, the signal receiving circuit 10 may be provided with a sensor component 11 and a filter circuit, wherein the sensor component 11 is used to receive the remote control signal of the fan, and the filter circuit is used to filter the interference in the remote control signal. In this embodiment, the sensor component 11 may be a photosensitive sensor, and in other embodiments, the sensor component 11 may also be other types of sensors, which are not limited here.

[0037] In this embodiment, the differential amplifier circuit 20 is mainly used to amplify signals. The specific structure of the differential amplifier circuit 20 is described below and is not limited here.

[0038] In addition, because the remote control signal is a square wave digital signal with a 38KHz carrier wave emitted by the remote control, in the prior art, even if the existing infrared detection circuit 100 receives and processes the signal, it still obtains a high-frequency square wave signal. When the controller detects the remote control signal, when a high-level remote control signal arrives, the fan controller has no time to detect it, and a low-level remote control signal has already arrived. Therefore, the controller cannot detect the amplitude of the remote control signal of the remote control, resulting in poor control effect of the remote control.

[0039] Therefore, in the present application, a peak voltage maintaining circuit 30 is provided, and the peak voltage maintaining circuit can maintain and smooth the remote control signal amplified by the differential amplifier circuit 20, so that the high level of the remote control signal is maintained for a period of time, thereby facilitating the controller to detect the amplitude of the remote control signal, thereby improving the precision and accuracy of the infrared detection circuit 100 in detecting the remote control signal.

[0040] Different from the prior art, the infrared detection circuit 100 of the present application is applied to a fan, and the infrared detection circuit 100 includes a signal receiving circuit 10, a differential amplifier circuit 20 and a peak voltage maintenance circuit 30. The signal receiving circuit 10 is used to receive the remote control signal of the fan and filter the remote control signal; the differential amplifier circuit 20 is connected to the signal receiving circuit 10, receives the filtered remote control signal and amplifies it; the peak voltage maintenance circuit 30 is connected to the differential amplifier circuit 20, receives the amplified remote control signal and performs peak maintenance processing to obtain a remote control analog signal. In the above manner, the infrared detection circuit 100 of the present application can filter out the infrared interference in the received environment through the signal receiving circuit 10, and use the differential amplifier circuit 20 to amplify the remote control signal, and finally use the peak voltage maintenance circuit 30 to perform peak maintenance processing on the amplified remote control signal to convert the remote control signal into a stable and smooth remote control analog signal. Therefore, the infrared detection circuit 100 of the present application reduces the interference of the environment on the infrared detection circuit 100, and utilizes the peak voltage maintenance circuit 30 to convert the remote control signal into a stable and smooth remote control analog signal, which is easy to be detected by the controller, thereby improving the precision and accuracy of the infrared detection circuit 100 in detecting the remote control signal.

[0041] Optionally, see Figure 2 , Figure 2 Schematic diagram of the circuit structure of the second embodiment of the infrared detection circuit of the present application. Figure 2 As shown, in this embodiment, the peak voltage maintaining circuit 30 includes a diode D1 , a first capacitor C1 and a first resistor R1 .

[0042] exist Figure 2In the embodiment, the input end of the diode D1 is connected to the differential amplifier circuit 20 to receive the amplified remote control signal; the first end of the first capacitor C1 is connected to the output end of the diode D1, and the second end of the first capacitor C1 is grounded; the first end of the first resistor R1 is connected to the output end of the diode D1, and the second end of the first resistor R1 is grounded; wherein the connection end of the first resistor R1 and the diode D1 serves as the output end of the peak voltage maintaining circuit 30 to output the remote control analog signal.

[0043] The working principle of the peak voltage maintaining circuit 30 is as follows:

[0044] When the amplified remote control signal passes through the diode D1, due to the presence of the first capacitor C1 and the first resistor R1, the high-level remote control signal is not discharged back. At this time, the high-level remote control signal will be maintained unchanged for a period of time. At this time, the signal input to the controller is a stable and smooth remote control analog signal. The controller can accurately detect the amplitude of the remote control analog signal.

[0045] In other embodiments, the peak voltage maintaining circuit 30 may also adopt other circuit structures as long as it can meet the function of maintaining the peak voltage, which is not limited here.

[0046] Compared with the prior art, the peak holding circuit of the present application converts a square wave digital signal with a high-frequency carrier into a stable and smooth remote control analog signal, so as to facilitate accurate detection by the controller, thereby improving the precision and accuracy of the infrared detection circuit 100 in detecting the remote control signal.

[0047] Optionally, see Figure 3 , Figure 3 Schematic diagram of the circuit structure of the third embodiment of the infrared detection circuit of the present application. Figure 3 As shown, in this embodiment, the signal receiving circuit 10 includes a second resistor R2 and a sensor component 11 .

[0048] Among them, the first end of the second resistor R2 receives a preset voltage signal; the first path end of the sensor component 11 is connected to the second end of the second resistor R2, the second path end of the sensor component 11 is grounded, and the signal receiving end of the sensor component 11 receives the remote control signal of the fan 300; wherein the connection end between the second resistor R2 and the sensor component 11 serves as the output end of the signal receiving circuit 10 to output the remote control signal.

[0049] In this embodiment, as described above, the sensor component 11 can be set as a photosensor. When the remote control signal is sent to the photosensor, the photosensor will perform a first filtering and conversion on the remote control signal to convert it into a remote control signal with an AC component.

[0050] In other embodiments, the sensor assembly 11 may also be other types of sensors, which are not limited here.

[0051] Alternatively, if Figure 3 As shown, in this embodiment, the signal receiving circuit 10 also includes a filter component 12, a first end of the filter component 12 is connected to the connection end of the second resistor R2 and the sensor component 11, and a second end of the filter component 12 is connected to the differential amplifier circuit 20, and the filter component 12 is used to filter the remote control signal.

[0052] In this embodiment, the filter component 12 is used to perform a second filtering on the remote control signal with AC components mentioned above. In actual fan operation, the fan working environment will inevitably have interference from infrared signals such as fluorescent lamps or sunlight. In this embodiment, the filter component 12 is set to effectively filter out the interference from infrared signals such as fluorescent lamps or sunlight, thereby improving the accuracy of the acquired remote control signal.

[0053] Alternatively, if Figure 3 As shown, in this embodiment, the filter component 12 includes a second capacitor C2, a first end of the second capacitor C2 is connected to the connection end of the second resistor R2 and the sensor component 11, and a second end of the second capacitor C2 is connected to the differential amplifier circuit 20.

[0054] In this embodiment, the second capacitor C2 plays the role of blocking DC and passing AC. After the first filtering and conversion by the photosensor, the remote control signal is a remote control signal with an AC component. Setting the second capacitor C2 can effectively filter out other interference signals and only receive valid remote control signals.

[0055] Optionally, see Figure 4 , Figure 4 Schematic diagram of the circuit structure of the fourth embodiment of the infrared detection circuit of the present application. Figure 4 As shown, in this embodiment, the differential amplifier circuit 20 includes a comparison circuit 21, a first input end of the comparison circuit 21 is connected to the signal receiving circuit 10, and a second input end of the comparison circuit 21 receives a reference signal; it is used to receive the filtered remote control signal; and the output end of the comparison circuit 21 is used to output the amplified remote control signal.

[0056] Specifically, Figure 4 As shown, the differential amplifier circuit 20 includes a comparator IC2A, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10 and a fourth capacitor C4.

[0057] like Figure 4As shown, one end of the seventh resistor R7 is connected to the signal receiving circuit 10, the other end of the seventh resistor R7 is connected to the first input end of the comparator IC2A, one end of the sixth resistor R6 is grounded, and the other end of the sixth resistor R6 is connected to the other end of the seventh resistor R7 and the first input end of the comparator IC2A.

[0058] One end of the eighth resistor R8 is grounded, the other end of the eighth resistor R8 is connected to the second input end of the comparator IC2A, one end of the ninth resistor R9 is connected to the other end of the eighth resistor R8 and the second input end of the comparator IC2A, the other end of the ninth resistor R9 is connected to the output end of the comparator IC2A, the fourth capacitor C4 is connected to the ninth resistor R9 in parallel, and the fourth capacitor C4 is used to compensate for the feedback loop of the comparator IC2A; one end of the tenth resistor R10 is connected to the output end of the comparator IC2A, and the other end of the tenth resistor R10 is connected to the peak voltage maintaining circuit 30.

[0059] Among them, the power input terminal of the comparator IC2A receives a preset voltage. In this embodiment, the preset voltage is 5V. In order to make the differential amplifier circuit 20 work stably and normally, in this embodiment, the resistance value of the seventh resistor R7 and the resistance value of the eighth resistor R8 can be set equal, and the resistance value of the sixth resistor R6 and the resistance value of the ninth resistor R9 can be set equal. At this time, the amplification factor β of the differential amplifier circuit 20 is R9 / R8.

[0060] In other embodiments, the differential amplifier circuit 20 may also be configured as other circuit structures as long as the above-mentioned amplification function is satisfied, which is not limited here.

[0061] Optionally, the present application further proposes an infrared control circuit, see Figure 5 , Figure 5 Schematic diagram of the structure of an embodiment of the infrared control circuit of the present application. Figure 5 As shown, the infrared control circuit 200 of this embodiment includes a plurality of infrared detection circuits 100 and receiving circuits 110 of any of the above embodiments.

[0062] Based on the above embodiments, since the sensor component 11 of the signal receiving circuit 10 in the infrared detection circuit 100 can only identify the remote control signal but cannot decode the remote control signal, in this embodiment, a receiving circuit 110 is added, and the receiving circuit 110 can be used to identify the remote control signal and decode the remote control signal to obtain a decoded signal. Among them, the decoded signal can be sent to the controller of the fan to make it determine whether it is its own fixed remote control code value. If it is its own fixed remote control code value, it will work and supply air. If it is not its own fixed remote control code value, it will not work.

[0063] See also Figure 5 ,like Figure 5As shown, the receiving circuit 110 of this embodiment includes a receiver component 111, a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a third capacitor C3.

[0064] like Figure 5 As shown, the receiver component 111 is used to receive a remote control signal; the first end of the third resistor R3 receives a preset voltage signal, and the second end of the third resistor R3 is connected to the power input end of the receiver component 111; the first end of the fourth resistor R4 receives a preset voltage signal, and the second end of the fourth resistor R4 is connected to the output end of the receiver component 111; the first end of the fifth resistor R5 is connected to the output end of the receiver component 111 and the second end of the fourth resistor R4, and the second end of the fifth resistor R5 serves as the output end of the receiving circuit 110 to output a decoding signal; one end of the third capacitor C3 is grounded, and the second end of the third capacitor C3 is connected to the second end of the fifth resistor R5.

[0065] In this embodiment, the receiver component 111 can be configured as an infrared receiving head. In other embodiments, the receiver component 111 can also be configured as other devices as long as the above functions are met, which is not limited here.

[0066] When the receiver component 111 receives the remote control signal of the fan, the receiving circuit 110 can decode the remote control signal to obtain a decoded signal corresponding to the remote control signal. In this embodiment, the decoded signal is the fixed remote control code value of the fan mentioned above.

[0067] Different from the prior art, a receiving circuit 110 is added in this embodiment to prevent interference from remote control signals of other fans in a multi-remote control signal scenario, thereby improving the control precision and accuracy of the fans.

[0068] Optionally, the present application further proposes a fan, see Figure 6 , Figure 6 Schematic diagram of the structure of the first embodiment of the fan of the present application. Figure 6 As shown, the fan 300 of this embodiment includes an air supply mechanism 210 , an oscillating mechanism 220 and a controller 230 .

[0069] Among them, the shaking head mechanism 220 is connected to the air supply mechanism 210, and the shaking head mechanism 220 is provided with the infrared control circuit 200 of the above-mentioned embodiment; multiple infrared detection circuits 100 are arranged on the shaking head mechanism 220, and the receiving circuit 110 is provided on the shaking head mechanism 220; the controller 230 is connected to the shaking head mechanism 220, the air supply mechanism 210 and the infrared control circuit 200, and is used to control the shaking head mechanism 220 and the air supply mechanism 210 to supply air based on the remote control analog signals of multiple infrared detection circuits 100 and the remote control signals of the receiving circuit 110.

[0070] See also Figure 7, Figure 7 : is a schematic diagram of the structure of the second embodiment of the fan of the present application. Figure 7 As shown, the fan 300 of this embodiment is a bladeless fan structure. In this embodiment, the air supply mechanism 210 and the shaking mechanism 220 are integrated together. The hollow part of the shaking mechanism 220 is the air supply mechanism 210 of the fan 300, and below the shaking mechanism 220 is the chassis fixing structure 240 of the fan 300.

[0071] See also Figure 7 and Figure 8 , Figure 8 Schematic diagram of an embodiment of the sensor installation position of the present application. Figure 7 and Figure 8 As shown, the fan 300 also includes a sensor mounting member 250, and the sensor components 11 of the plurality of infrared detection circuits 100 are evenly arranged on the sensor mounting member 250. The sensor mounting member 250 is mounted on the shaking mechanism 220 of the fan 300. During the swinging process of the fan 300, the sensor mounting member 250 keeps running synchronously with the shaking mechanism 220, and the relative position of each sensor component 11 and the positive blowing direction of the fan 300 remains unchanged during the shaking process. Among them, the sensor mounting member 250 can be as follows Figure 7 A semicircular arc structure is shown. In other embodiments, the sensor mounting member 250 can also be in other shapes. The shape of the sensor mounting member 250 is changed based on the actual situation of the shaking mechanism 220 and is not limited here.

[0072] In other embodiments, the sensor assembly 11 may also be designed and installed with equal angle distribution on the sensor assembly 11 in combination with the air supply range of the shaking mechanism 220, which is not limited here.

[0073] The receiver component 111 of the receiving circuit 110 may also be arranged on the sensor mounting member 250, preferably, as Figure 7 As shown, the receiver assembly 111 can be disposed at the center of the sensor mounting member 250. In other embodiments, the receiver assembly 111 can also be disposed at other positions of the sensor mounting member 250, which is not limited herein.

[0074] In this embodiment, the controller 230 can be set in the chassis fixed structure 240, and be respectively connected to the shaking head mechanism 220, the air supply mechanism 210 and the infrared control circuit 200. When the user uses the remote control to transmit the remote control signal, the controller 230 receives the remote control analog signal of multiple infrared detection circuits 100 to control the shaking head mechanism 220 and the air supply mechanism 210 to supply air.

[0075] For example, the controller 230 determines the target position of the remote control by comparing the amplitude of each remote control analog signal, and can obtain the number of steps of the stepping motor of the shaking mechanism 220 during the shaking process, thereby controlling the air supply mechanism 210 to rotate toward the target position.

[0076] Optionally, in this embodiment, the controller 230 is also used to determine whether the decoded signal is a preset fixed code value. If the decoded signal is a preset fixed code value, the controller 230 controls the shaking mechanism 220 and the air supply mechanism 210 to supply air based on the remote control analog signal. If the decoded signal is not a preset fixed code value, the controller 230 controls the shaking mechanism 220 and the air supply mechanism 210 to stop working.

[0077] Optionally, based on the above embodiment, in other embodiments, the fan 300 may also be an ordinary floor fan 300, which is not limited here. In addition, in the present application, the oscillating mechanism 220 of the fan 300 may be the upper air outlet of the bladeless fan 300, or may be on the fan head of a floor fan, or may be the moving part of the oscillating drive mechanism, which is not limited here.

[0078] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An infrared detection circuit, characterized in that: Applied to a fan, the infrared detection circuit comprises: A signal receiving circuit, used for receiving a remote control signal of the fan and filtering the remote control signal; A differential amplifier circuit, connected to the signal receiving circuit, receives and amplifies the filtered remote control signal; The peak voltage maintaining circuit is connected to the differential amplifier circuit, receives the amplified remote control signal and performs peak voltage maintaining processing to obtain a remote control analog signal.

2. The infrared detection circuit according to claim 1, characterized in that: The peak voltage maintaining circuit comprises: A diode, wherein an input end of the diode is connected to the differential amplifier circuit to receive the amplified remote control signal; A first capacitor, wherein a first end of the first capacitor is connected to the output end of the diode, and a second end of the first capacitor is grounded; a first resistor, wherein a first end of the first resistor is connected to the output end of the diode, and a second end of the first resistor is grounded; The connection end between the first resistor and the diode serves as the output end of the peak voltage maintaining circuit to output the remote control analog signal.

3. The infrared detection circuit according to claim 1, characterized in that: The signal receiving circuit comprises: a second resistor, wherein a first end of the second resistor receives a preset voltage signal; A sensor component, wherein a first passage end of the sensor component is connected to a second end of the second resistor, a second passage end of the sensor component is grounded, and a signal receiving end of the sensor component receives a remote control signal of the fan; The connection end between the second resistor and the sensor assembly serves as the output end of the signal receiving circuit to output the remote control signal.

4. The infrared detection circuit according to claim 3, characterized in that: The signal receiving circuit also includes: A filter component, wherein a first end of the filter component is connected to a connection end between the second resistor and the sensor component, a second end of the filter component is connected to the differential amplifier circuit, and the filter component is used to filter the remote control signal.

5. The infrared detection circuit according to claim 4, characterized in that: The filtering component includes a second capacitor, a first end of the second capacitor is connected to a connection end of the second resistor and the sensor component, and a second end of the second capacitor is connected to the differential amplifier circuit.

6. The infrared detection circuit according to claim 1, characterized in that: The differential amplifier circuit comprises: A comparison circuit, wherein the first input terminal of the comparison circuit is connected to the signal receiving circuit, and the second input terminal of the comparison circuit receives a reference signal; the comparison circuit is used to receive the filtered remote control signal; and the output terminal of the comparison circuit is used to output the amplified remote control signal.

7. An infrared control circuit, characterized in that: It comprises a plurality of infrared detection circuits and receiving circuits as described in any one of claims 1 to 6, wherein the receiving circuit is used to identify the remote control signal and decode the remote control signal to obtain a decoded signal.

8. The infrared control circuit according to claim 7, characterized in that: The receiving circuit comprises: A receiver component, configured to receive the remote control signal; a third resistor, a first end of the third resistor receiving a preset voltage signal, and a second end of the third resistor connected to a power input end of the receiver component; a fourth resistor, a first end of the fourth resistor receiving the preset voltage signal, and a second end of the fourth resistor connected to the output end of the receiver component; a fifth resistor, wherein a first end of the fifth resistor is connected to the output end of the receiver component and the second end of the fourth resistor, and a second end of the fifth resistor serves as an output end of the receiving circuit to output the decoded signal; A third capacitor, one end of the third capacitor is grounded, and a second end of the third capacitor is connected to the second end of the fifth resistor.

9. A fan, characterized in that: include: Air supply mechanism, An oscillating mechanism connected to the air supply mechanism, wherein the oscillating mechanism is provided with the infrared control circuit according to any one of claims 7 to 8; wherein a plurality of the infrared detection circuits are arranged on the oscillating mechanism, and the receiving circuit is provided on the oscillating mechanism; The controller is connected to the shaking mechanism, the air supply mechanism and the infrared control circuit, and is used to control the shaking mechanism and the air supply mechanism to supply air based on the remote control analog signals of the multiple infrared detection circuits and the decoding signals of the receiving circuit.

10. The fan according to claim 9, characterized in that The controller is also used to determine whether the decoding signal is a preset fixed code value. If the decoding signal is the preset fixed code value, the controller controls the shaking mechanism and the air supply mechanism to supply air based on the remote control analog signal. If the decoding signal is not the preset fixed code value, the controller controls the shaking mechanism and the air supply mechanism to stop working.

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