Air curtain machine system based on revolving door

Abstract

The utility model belongs to the technical field of air curtain machines, and discloses an air curtain machine system based on a revolving door, which comprises an air curtain machine, a switching device and a sensing device, the air curtain machine is used for providing a second air curtain and a first air curtain for the revolving door; the switching device comprises a rectification filtering module, a voltage reduction module, a control module, a silicon controlled rectifier module, a live wire input end, a live wire output end and a zero line end. The rectifying and filtering module is used for converting external mains supply into first direct current and inputting the first direct current into the voltage reduction module; the step-down module is used for converting the first direct current into second direct current; one end of the switch side of the silicon-controlled module is connected with the live wire input end, and the other end is connected with the live wire output end; the control module is used for setting the conduction angle of the silicon controlled rectifier module to be a first conduction angle or a second conduction angle. According to the utility model, the control module and the silicon controlled rectifier module are arranged, so that the problem of contact damage caused by frequent switching can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of air curtain machines, in particular to an air curtain machine system based on a revolving door. Background Art

[0002] Revolving doors are typically equipped with an air curtain system. When the door is unoccupied, the air curtain operates at low speed, producing a weak wind curtain. When it detects someone is about to enter, the air curtain switches to high speed, producing a strong wind curtain. This causes the air curtain to frequently switch between high and low speeds. Existing technology can easily lead to unreliable switching contacts, resulting in confusion between high and low speeds. Therefore, improving the reliability of this frequent switching situation is a pressing technical issue within the industry. Utility Model Content

[0003] The purpose of the utility model is to provide an air curtain system based on a revolving door to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The utility model solves the technical problem by providing an air curtain system based on a revolving door, comprising an air curtain, a switching device, and a sensing device. The air curtain is installed above the revolving door and is used to provide a second air curtain and a first air curtain for the revolving door; wherein the wind speed of the second air curtain is lower than the wind speed of the first air curtain;

[0005] The switching device includes: a rectifier and filter module, a voltage reduction module, a control module, a thyristor module, a live wire input terminal, a live wire output terminal and a neutral wire terminal;

[0006] The live wire input end is used to connect to the live wire of the external mains power, the neutral wire end is used to connect to the neutral wire of the external mains power, the live wire output end is connected to the live wire end of the load of the air curtain machine, and the neutral wire end is connected to the neutral wire end of the load of the air curtain machine;

[0007] The rectifier and filter module is used to convert the external mains electricity into a first direct current, and input the first direct current into the step-down module; the step-down module is used to step down the first direct current to obtain a second direct current; the second direct current is used to provide power to the sensing device and the control module;

[0008] One end of the switch side of the thyristor module is connected to the live wire input end, and the other end of the switch side of the thyristor module is connected to the live wire output end; the sensing device is provided with a sensing area, when the sensing target enters the sensing area, the sensing device outputs a first signal, when the sensing target does not enter the sensing area, the sensing device outputs a second signal;

[0009] The control module is used to: when receiving a first signal, set the conduction angle of the thyristor module to a first conduction angle; when receiving a second signal, set the conduction angle of the thyristor module to a second conduction angle; wherein the first conduction angle is greater than the second conduction angle.

[0010] Furthermore, the rectification and filtering module includes: a transformer, a first diode, a second diode, a third diode, a fourth diode, a first capacitor and a second capacitor;

[0011] The first input end of the transformer is connected to the live wire input end, and the second input end of the transformer is connected to the neutral wire end; the first output end of the transformer is connected to the anode of the first diode and the cathode of the second diode respectively, and the second output end of the transformer is connected to the anode of the third diode and the cathode of the fourth diode respectively;

[0012] The cathode of the first diode is respectively connected to the cathode of the third diode, the positive electrode of the second capacitor, one end of the first capacitor and the input end of the step-down module; the anode of the second diode is respectively connected to the anode of the fourth diode, the negative electrode of the second capacitor, the other end of the first capacitor and the ground end of the step-down module.

[0013] Furthermore, the step-down module includes: a step-down chip, a first resistor and a third capacitor;

[0014] One end of the first resistor is respectively connected to one end of the first capacitor, the positive electrode of the second capacitor, the cathode of the first diode and the cathode of the third diode; the ground end of the step-down chip is respectively connected to the negative electrode of the third capacitor, the other end of the first capacitor, the negative electrode of the second capacitor, the anode of the second diode and the anode of the fourth diode; the output end of the step-down chip is respectively connected to the positive electrode of the third capacitor and the power supply end of the control module.

[0015] Furthermore, the control module includes: a single-chip microcomputer chip, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor and a first transistor; the first pin of the single-chip microcomputer chip is respectively connected to the output end of the step-down chip, the positive electrode of the third capacitor and one end of the second resistor;

[0016] The second pin of the single-chip microcomputer chip is respectively connected to one end of the fourth resistor, the other end of the fourth resistor is connected to the collector of the first transistor, and the base of the first transistor is respectively connected to the other end of the second resistor, one end of the third resistor and the output end of the sensing device;

[0017] The other end of the third resistor is respectively connected to the emitter of the first transistor, the ground end of the buck chip, the negative electrode of the third capacitor, the other end of the first capacitor, the negative electrode of the second capacitor, the anode of the second diode and the anode of the fourth diode; the sixth pin of the single-chip microcomputer chip is connected to one end of the sixth resistor, and the other end of the sixth resistor is connected to the live wire input end; the fourth pin of the single-chip microcomputer chip is connected to the control end of the thyristor module.

[0018] Furthermore, the thyristor module includes: a thyristor, a fifth resistor, a seventh resistor and a fourth capacitor; the input end of the thyristor is respectively connected to the other end of the sixth resistor, the live wire input end and one end of the seventh resistor; the control end of the thyristor is respectively connected to the fourth pin of the microcontroller chip and one end of the fifth resistor; the other end of the fifth resistor is respectively connected to the output end of the thyristor, one end of the fourth capacitor and the live wire output end; the other end of the fourth capacitor is connected to the other end of the seventh resistor.

[0019] Furthermore, the revolving door-based air curtain system also includes a fuse; one end of the fuse is connected to the live wire input end, and the other end of the fuse is respectively connected to the first input end of the transformer, the other end of the sixth resistor, the input end of the thyristor and one end of the seventh resistor.

[0020] Furthermore, the model of the step-down chip is: WSA78L05.

[0021] Furthermore, the second capacitor is an electrolytic capacitor.

[0022] Furthermore, the third capacitor is an electrolytic capacitor.

[0023] Furthermore, the model of the single chip microcomputer chip is: SC8P052.

[0024] The beneficial effects of the present invention are as follows: by providing a control module and a thyristor module, and by using the control module to set the conduction angle of the thyristor module, the present invention achieves switching of the driving voltage of the air curtain generated by the air curtain. This achieves the first and second air curtains required for a revolving door. Because the thyristor module can achieve changes in driving voltage without switching contacts, the problem of contact damage caused by frequent switching is avoided. The stability of the operating conditions is improved. The technical solution of this application is primarily used in the field of air curtain technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief description of the drawings required for describing the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of them. Those skilled in the art can also derive other design solutions and drawings based on these drawings without inventive effort.

[0026] Figure 1 This is a schematic diagram of the system structure of the air curtain system based on the revolving door;

[0027] Figure 2 is a schematic diagram of the system connection structure of the switching device;

[0028] Figure 3 It is a schematic diagram of the circuit connection structure of the switching device. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0030] It should be noted that although the system diagrams illustrate functional module divisions and the flowcharts illustrate logical sequences, in certain circumstances, the steps shown or described may be performed in a sequence that differs from the module divisions in the system or the sequence in the flowcharts. The terms "first," "second," and so on, in the specification, claims, and drawings, are used to distinguish similar items and are not necessarily used to describe a specific sequence or precedence.

[0031] refer to Figure 1 、 Figure 2 and Figure 3 . Figure 1 This is a schematic diagram of the system structure of the air curtain system based on the revolving door. Figure 2 It is a schematic diagram of the system connection structure of the switching device. Figure 3 It is a schematic diagram of the circuit connection structure of the switching device.

[0032] The present invention aims to address the chaotic switching caused by unreliable switching contacts. In the prior art, relays are generally used to switch between high and low gears. Because relays use contact switching, frequent switching can easily lead to contact damage, resulting in unreliable switching.

[0033] In order to improve the reliability of switching, the present application discloses an air curtain system based on a revolving door, comprising: an air curtain 200, a switching device 100 and a sensing device 300. The air curtain 200 is installed above the revolving door.

[0034] The air curtain machine 200 mainly provides an air curtain for the pedestrian passage of the revolving door, and the air curtain refers to the flowing wind sprayed downward.

[0035] In this embodiment, the air curtain machine 200 provides two types of air curtains, namely a second air curtain and a first air curtain. The second air curtain is mainly for the pedestrian passage of the revolving door when there is no one, while the first air curtain is for the pedestrian passage of the revolving door when there is someone.

[0036] The wind speed of the second wind curtain is lower than the wind speed of the first wind curtain.

[0037] In actual application, the second air curtain can keep the pedestrian passage of the revolving door clean. When someone enters the pedestrian passage of the revolving door, the wind speed of the first air curtain is greater than that of the second air curtain, so the first air curtain can better clean the person's clothes.

[0038] The determination of whether a person is passing through the pedestrian passage of the revolving door is performed by the sensing device 300. The sensing device 300 may be a pyroelectric human body sensing device. When the sensing device 300 senses that a person has entered the pedestrian passage of the revolving door, it outputs a first signal. When the sensing device 300 does not sense that a person has entered the pedestrian passage of the revolving door, it outputs a second signal.

[0039] The first signal or the second signal is transmitted to the switching device 100, which then switches the air curtain 200 to the second air curtain or the first air curtain based on the first signal or the second signal. Specifically, when the switching device 100 receives the first signal, it requests the air curtain 200 to output the first air curtain. When the switching device 100 receives the second signal, it requests the air curtain 200 to output the second air curtain.

[0040] The switching device 100 includes a rectifier and filter module 101 , a voltage reduction module 102 , a control module 103 , a thyristor module 104 , a live input terminal L-in, a live output terminal L-out, and a neutral terminal N.

[0041] The live wire input terminal L-in is used to connect to the external mains live wire, the neutral wire terminal N is used to connect to the external mains neutral wire, the live wire output terminal L-out is connected to the load live wire terminal of the air curtain machine 200, and the neutral wire terminal N is connected to the load neutral wire terminal N of the air curtain machine 200.

[0042] The rectifier and filter module 101 is used to convert external AC power into a first DC power, and input the first DC power into the step-down module 102 .

[0043] The rectifier and filter module 101 converts external AC power into DC power. In this specific embodiment, the rectifier and filter module 101 receives AC power via the live input terminal L-in and the neutral terminal N. The AC power is then converted into DC power through rectification and filtering. For ease of description, this DC power is referred to as the first DC power. The rectifier and filter module 101 is connected to the step-down module 102. After receiving the first DC power, the rectifier and filter module 101 transmits the first DC power to the step-down module 102.

[0044] The step-down module 102 is used to step down the first DC power to obtain a second DC power; the second DC power is used to provide power to the sensing device 300 and the control module 103.

[0045] The main function of the voltage reduction module 102 is to reduce the voltage of the input direct current. After receiving the first direct current, the input end of the voltage reduction module 102 will reduce the voltage of the first direct current to obtain the second direct current.

[0046] One end of the switch side of the thyristor module 104 is connected to the live wire input terminal L-in, and the other end of the switch side of the thyristor module 104 is connected to the live wire output terminal L-out.

[0047] The sensing device 300 is provided with a sensing area. When a sensing target enters the sensing area, the sensing device 300 outputs a first signal. When the sensing target does not enter the sensing area, the sensing device 300 outputs a second signal.

[0048] The control module 103 is configured to: when receiving a first signal, set the conduction angle of the thyristor module 104 to a first conduction angle; when receiving a second signal, set the conduction angle of the thyristor module 104 to a second conduction angle; wherein the first conduction angle is greater than the second conduction angle.

[0049] To control the speed of the air curtain generated by the air curtain 200 through the thyristor module 104, the control module 103 can set the conduction angle of the thyristor module 104. Due to the characteristics of the thyristor module 104, the larger the conduction angle, the higher the voltage across the thyristor module 104. Because the wind speed of the first air curtain is greater than that of the second air curtain, the driving voltage required to drive the air curtain 200 when driving the first air curtain is greater than the voltage required to drive the second air curtain. Because the first conduction angle is greater than the second conduction angle, the control module 103 sets the first conduction angle to the thyristor module 104 when receiving the first signal (indicating the need to generate the first air curtain). When receiving the second signal (indicating the need to generate the second air curtain), the control module 103 sets the second conduction angle to the thyristor module 104.

[0050] The present invention utilizes a control module 103 and a thyristor module 104. The control module 103 sets the conduction angle of the thyristor module 104 to switch the driving voltage of the air curtain generated by the air curtain 200. This achieves the primary and secondary air curtains required for a revolving door. Because the thyristor module 104 can change the driving voltage without switching contacts, frequent contact damage caused by switching is avoided, improving operating stability.

[0051] In order to further illustrate the technical solution of the present application, this specific embodiment provides a specific circuit structure of the switching device 100.

[0052] The rectifier and filter module 101 includes a transformer T1, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first capacitor C1, and a second capacitor C2. The step-down module 102 includes a step-down chip U1, a first resistor R1, and a third capacitor C3. The control module 103 includes a single-chip microcomputer chip U2, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a first transistor Q1. The thyristor module 104 includes a thyristor (SCR), a fifth resistor R5, a seventh resistor R7, and a fourth capacitor C4.

[0053] The first input terminal of the transformer T1 is connected to the live line input terminal L-in, and the second input terminal of the transformer T1 is connected to the neutral line terminal N.

[0054] The first output terminal of the transformer T1 is connected to the anode of the first diode D1 and the cathode of the second diode D2 respectively, and the second output terminal of the transformer T1 is connected to the anode of the third diode D3 and the cathode of the fourth diode D4 respectively.

[0055] The cathode of the first diode D1 is respectively connected to the cathode of the third diode D3, the anode of the second capacitor C2, one end of the first capacitor C1, and the input end of the step-down module 102. The anode of the second diode D2 is respectively connected to the anode of the fourth diode D4, the cathode of the second capacitor C2, and the other end of the first capacitor C1.

[0056] One end of the first resistor R1 is connected to one end of the first capacitor C1, the positive electrode of the second capacitor C2, the cathode of the first diode D1, and the cathode of the third diode D3. The ground terminal of the step-down chip U1 is connected to the negative electrode of the third capacitor C3, the other end of the first capacitor C1, the negative electrode of the second capacitor C2, the anode of the second diode D2, and the anode of the fourth diode D4. The output end of the step-down chip U1 is connected to the positive electrode of the third capacitor C3.

[0057] The first pin of the single-chip microcomputer chip U2 is respectively connected to the output end of the step-down chip U1, the positive electrode of the third capacitor C3, and one end of the second resistor R2. The second pin of the single-chip microcomputer chip U2 is respectively connected to one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected to the collector of the first transistor Q1, and the base of the first transistor Q1 is respectively connected to the other end of the second resistor R2, one end of the third resistor R3, and the output end of the sensing device 300.

[0058] The other end of the third resistor R3 is respectively connected to the emitter of the first transistor Q1, the ground end of the buck chip U1, the cathode of the third capacitor C3, the other end of the first capacitor C1, the cathode of the second capacitor C2, the anode of the second diode D2 and the anode of the fourth diode D4.

[0059] The sixth pin of the single-chip microcomputer chip U2 is connected to one end of a sixth resistor R6, and the other end of the sixth resistor R6 is connected to the live wire input terminal L-in.

[0060] The input end of the thyristor SCR is respectively connected to the other end of the sixth resistor R6, the live wire input end L-in and one end of the seventh resistor R7; the control end of the thyristor SCR is respectively connected to the fourth pin of the microcontroller chip U2 and one end of the fifth resistor R5.

[0061] The other end of the fifth resistor R5 is connected to the output end of the thyristor SCR, one end of the fourth capacitor C4 and the live wire output end L-out respectively; the other end of the fourth capacitor C4 is connected to the other end of the seventh resistor R7.

[0062] The model of the step-down chip U1 is WSA78L05. The model of the microcontroller chip U2 is SC8P052. The first pin of the microcontroller chip U2 serves as its power supply, the second pin of the microcontroller chip U2 serves as its first input, the fourth pin of the microcontroller chip U2 serves as its output, and the sixth pin of the microcontroller chip U2 serves as its second input. The second pin of the microcontroller chip U2 serves as the first input, receiving the first signal or the second signal generated by the sensing device 300. The fourth pin of the microcontroller chip U2 serves as the output, controlling the conduction angle of the thyristor (SCR).

[0063] To protect the switching device 100, in some further specific embodiments, the revolving door air curtain system further includes a fuse F1. One end of the fuse F1 is connected to the live wire input terminal L-in, and the other end of the fuse F1 is connected to the first input terminal of the transformer T1, the other end of the sixth resistor R6, the input terminal of the thyristor (SCR), and one end of the seventh resistor R7. The fuse F1 protects the switching device 100.

[0064] In some further specific embodiments, the second capacitor C2 is an electrolytic capacitor. The third capacitor C3 is an electrolytic capacitor.

[0065] The above specifically describes the preferred embodiments of the present invention, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An air curtain system based on a revolving door, characterized in that: include: An air curtain machine (200), a switching device (100), and a sensing device (300), wherein the air curtain machine (200) is installed above the revolving door, and the air curtain machine (200) is used to provide a second air curtain and a first air curtain for the revolving door; wherein the wind speed of the second air curtain is lower than the wind speed of the first air curtain; The switching device (100) comprises: a rectifier and filter module (101), a voltage reduction module (102), a control module (103), a thyristor module (104), a live wire input terminal (L-in), a live wire output terminal (L-out), and a neutral wire terminal (N); The live wire input terminal (L-in) is used to connect to an external mains live wire, the neutral wire terminal (N) is used to connect to an external mains neutral wire, the live wire output terminal (L-out) is connected to a load live wire terminal of the air curtain machine (200), and the neutral wire terminal (N) is connected to a load neutral wire terminal (N) of the air curtain machine (200); The rectifier filter module (101) is used to convert external mains electricity into a first direct current, and input the first direct current into the step-down module (102); the step-down module (102) is used to step down the first direct current to obtain a second direct current; the second direct current is used to provide power to the induction device (300) and the control module (103); One end of the switch side of the thyristor module (104) is connected to the live wire input end (L-in), and the other end of the switch side of the thyristor module (104) is connected to the live wire output end (L-out); the sensing device (300) is provided with a sensing area, and when a sensing target enters the sensing area, the sensing device (300) outputs a first signal, and when the sensing target does not enter the sensing area, the sensing device (300) outputs a second signal; The control module (103) is used to: when receiving a first signal, set the conduction angle of the thyristor module (104) to a first conduction angle; when receiving a second signal, set the conduction angle of the thyristor module (104) to a second conduction angle; wherein the first conduction angle is greater than the second conduction angle.

2. The air curtain system based on a revolving door according to claim 1, characterized in that: The rectification and filtering module (101) comprises: a transformer (T1), a first diode (D1), a second diode (D2), a third diode (D3), a fourth diode (D4), a first capacitor (C1) and a second capacitor (C2); The first input end of the transformer (T1) is connected to the live wire input end (L-in), and the second input end of the transformer (T1) is connected to the neutral wire end (N); the first output end of the transformer (T1) is respectively connected to the anode of the first diode (D1) and the cathode of the second diode (D2), and the second output end of the transformer (T1) is respectively connected to the anode of the third diode (D3) and the cathode of the fourth diode (D4); The cathode of the first diode (D1) is respectively connected to the cathode of the third diode (D3), the positive electrode of the second capacitor (C2), one end of the first capacitor (C1) and the input end of the step-down module (102); the anode of the second diode (D2) is respectively connected to the anode of the fourth diode (D4), the negative electrode of the second capacitor (C2), the other end of the first capacitor (C1) and the ground end of the step-down module (102).

3. The air curtain system based on a revolving door according to claim 2, characterized in that: The step-down module (102) comprises: a step-down chip (U1), a first resistor (R1) and a third capacitor (C3); One end of the first resistor (R1) is respectively connected to one end of the first capacitor (C1), the positive electrode of the second capacitor (C2), the cathode of the first diode (D1), and the cathode of the third diode (D3); the ground end of the step-down chip (U1) is respectively connected to the negative electrode of the third capacitor (C3), the other end of the first capacitor (C1), the negative electrode of the second capacitor (C2), the anode of the second diode (D2), and the anode of the fourth diode (D4); and the output end of the step-down chip (U1) is respectively connected to the positive electrode of the third capacitor (C3) and the power supply end of the control module (103).

4. The air curtain system based on a revolving door according to claim 3, characterized in that: The control module (103) comprises: a single-chip microcomputer chip (U2), a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a fifth resistor (R5), a sixth resistor (R6), and a first transistor (Q1); a first pin of the single-chip microcomputer chip (U2) is respectively connected to the output end of the step-down chip (U1), the positive electrode of the third capacitor (C3), and one end of the second resistor (R2); The second pin of the single-chip microcomputer chip (U2) is respectively connected to one end of a fourth resistor (R4), the other end of the fourth resistor (R4) is connected to the collector of the first transistor (Q1), and the base of the first transistor (Q1) is respectively connected to the other end of the second resistor (R2), one end of the third resistor (R3), and the output end of the sensing device (300); The other end of the third resistor (R3) is respectively connected to the emitter of the first transistor (Q1), the ground terminal of the step-down chip (U1), the negative electrode of the third capacitor (C3), the other end of the first capacitor (C1), the negative electrode of the second capacitor (C2), the anode of the second diode (D2), and the anode of the fourth diode (D4); the sixth pin of the single-chip microcomputer chip (U2) is connected to one end of the sixth resistor (R6), and the other end of the sixth resistor (R6) is connected to the live wire input terminal (L-in); and the fourth pin of the single-chip microcomputer chip (U2) is connected to the control terminal of the thyristor module (104).

5. The air curtain system based on a revolving door according to claim 4, characterized in that: The thyristor module (104) comprises: a thyristor (SCR), a fifth resistor (R5), a seventh resistor (R7) and a fourth capacitor (C4); the input end of the thyristor (SCR) is respectively connected to the other end of the sixth resistor (R6), the live wire input end (L-in) and one end of the seventh resistor (R7); the control end of the thyristor (SCR) is respectively connected to the fourth pin of the single-chip microcomputer chip (U2) and one end of the fifth resistor (R5); the other end of the fifth resistor (R5) is respectively connected to the output end of the thyristor (SCR), one end of the fourth capacitor (C4) and the live wire output end (L-out); the other end of the fourth capacitor (C4) is connected to the other end of the seventh resistor (R7).

6. The air curtain system based on a revolving door according to claim 5, characterized in that: It also includes a fuse (F1); one end of the fuse (F1) is connected to the live wire input end (L-in), and the other end of the fuse (F1) is respectively connected to the first input end of the transformer (T1), the other end of the sixth resistor (R6), the input end of the thyristor (SCR), and one end of the seventh resistor (R7).

7. The air curtain system based on a revolving door according to claim 3, characterized in that: The model of the step-down chip (U1) is: WSA78L05.

8. The air curtain system based on a revolving door according to claim 2, characterized in that: The second capacitor (C2) is an electrolytic capacitor.

9. The air curtain system based on a revolving door according to claim 3, characterized in that: The third capacitor (C3) is an electrolytic capacitor.

10. The air curtain system based on a revolving door according to claim 4, characterized in that: The model of the single chip microcomputer chip (U2) is: SC8P052.

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