Temperature control circuit and physical therapeutic apparatus

Abstract

The embodiment of the utility model discloses a temperature control circuit and a physical therapeutic apparatus. The temperature control circuit comprises a control unit, an optocoupler, a silicon controlled rectifier, a 36V alternating current power supply unit and a heating output interface, the control unit is electrically connected with the main control board through the first socket; the optocoupler is electrically connected with the control unit; the silicon controlled rectifier is electrically connected with the optocoupler; the 36V alternating current power supply unit is electrically connected with the silicon controlled rectifier; the heating output interface is electrically connected with the silicon controlled rectifier and the 36V alternating current power supply unit respectively; the heating output interface is used for connecting a to-be-heated device. The control unit is used for controlling the optocoupler to start, the optocoupler is used for controlling the silicon controlled rectifier to conduct, the 36V alternating current power supply unit is used for supplying power to the silicon controlled rectifier, and the technical problems that in the prior art, a heating power source of a physical therapeutic apparatus is low in safety and electromagnetic radiation cannot meet the requirement in the high-power heating process are solved. The technical effects of improving the safety of the circuit and reducing the electromagnetic radiation of the circuit are achieved.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of medical devices, and in particular to a temperature control circuit and a physical therapy apparatus. Background Art

[0002] Currently, the far-infrared treatment functions of medical equipment in the market generally use AC220V and DC36V to achieve high-power heating.

[0003] However, using AC220V to achieve high-power heating poses a safety hazard because the voltage is too high; using DC36V to achieve high-power heating makes it difficult to meet EMC requirements because the electromagnetic radiation of the AC-to-DC switching power supply is relatively strong. Utility Model Content

[0004] The embodiments of the utility model provide a temperature control circuit and a physical therapy apparatus, which solve the technical problems in the prior art that the heating power supply of the physical therapy apparatus has low safety and electromagnetic radiation cannot meet the requirements during the process of realizing high-power heating.

[0005] The embodiment of the utility model provides a temperature control circuit, which includes a control unit, an optical coupler, a thyristor, a 36V AC power supply unit and a heating output interface;

[0006] The control unit is electrically connected to the main control board through the first socket; the optical coupler is electrically connected to the control unit; the thyristor is electrically connected to the optical coupler; the 36V AC power supply unit is electrically connected to the thyristor; the heating output interface is electrically connected to the thyristor and the 36V AC power supply unit respectively; the heating output interface is used to connect the device to be heated;

[0007] The optical coupler is started under the control of the control unit and controls the thyristor to be turned on. The 36V AC power supply unit supplies power to the thyristor, and the thyristor heats the device to be heated through the heating output interface.

[0008] Further, the 36V AC power supply unit includes a second socket and a toroidal transformer;

[0009] The second socket is electrically connected to the mains via the toroidal transformer;

[0010] The toroidal transformer is used to convert 220V AC mains power into 36V AC power, and feed the power into the thyristor through the second socket.

[0011] Further, the control unit includes a first resistor, a second resistor and a first transistor;

[0012] The first end of the first resistor is electrically connected to the first socket, the first end of the first resistor is electrically connected to the first power supply, and the second end of the first resistor is electrically connected to the positive electrode of the light emitting diode in the optocoupler;

[0013] A first end of the second resistor is electrically connected to the first socket, and a second end of the second resistor is electrically connected to the base of the first transistor;

[0014] The collector of the first transistor is electrically connected to the cathode of the light emitting diode in the optocoupler, the emitter of the first transistor is grounded; and the emitter of the first transistor is electrically connected to the first socket.

[0015] Furthermore, the temperature control circuit further includes a voltage dividing unit, and the voltage dividing unit is arranged between the optical coupler and the thyristor.

[0016] Further, the voltage dividing unit includes a third resistor and a fourth resistor;

[0017] The first end of the third resistor is electrically connected to the first end of the bidirectional trigger diode in the optical coupler, and the second end of the third resistor is electrically connected to the positive terminal of the second socket of the 36V AC power supply unit;

[0018] The first end of the fourth resistor is electrically connected to the second end of the bidirectional trigger diode in the optical coupler, and the second end of the fourth resistor is electrically connected to the first end of the third socket of the heating output interface;

[0019] The first end of the fourth resistor is electrically connected to the control end of the thyristor.

[0020] Furthermore, the temperature control circuit further includes a first filtering unit and a second filtering unit;

[0021] The first filtering unit is arranged between the thyristor and the voltage dividing unit; the second filtering unit is arranged between the thyristor and the 36V AC power supply unit.

[0022] Further, the first filtering unit includes a fifth resistor and a first capacitor; the second filtering unit includes a sixth resistor and a second capacitor;

[0023] The first end of the fifth resistor is electrically connected to the first end of the third resistor, the second end of the fifth resistor is electrically connected to the positive electrode of the thyristor, and the second end of the fifth resistor is electrically connected to the positive terminal of the second socket of the 36V AC power supply unit;

[0024] The first end of the first capacitor is electrically connected to the first end of the fifth resistor, and the second end of the first capacitor is electrically connected to the heating output interface;

[0025] The first end of the second capacitor is electrically connected to the positive terminal of the second socket of the 36V AC power supply unit, the second end of the second capacitor is electrically connected to the first end of the sixth resistor, and the second end of the sixth resistor is electrically connected to the heating output interface;

[0026] The negative power end of the second socket of the 36V AC power supply unit is electrically connected to the heating output interface.

[0027] Furthermore, the temperature control circuit also includes a resettable fuse;

[0028] The resettable fuse is arranged between the second filter unit and the 36V AC power supply unit.

[0029] An embodiment of the present invention further provides a physical therapy apparatus, which includes the temperature control circuit described in any of the above embodiments.

[0030] The embodiment of the utility model discloses a temperature control circuit and a physical therapy apparatus, wherein the temperature control circuit includes a switch unit control unit, an optical coupler, a thyristor, a 36V AC power supply unit and a heating output interface; the switch unit control unit is electrically connected to the main control board mains via a first socket; the optical coupler is electrically connected to the switch unit control unit; the thyristor is electrically connected to the optical coupler; the 36V AC power supply unit is electrically connected to the thyristor; the heating output interface is electrically connected to the thyristor and the 36V AC power supply unit, respectively; and the heating output interface is used to connect a device to be heated. The present application controls the optical coupler to start through the switch unit control unit, controls the thyristor to conduct through the optical coupler, and supplies power to the thyristor through the 36V AC power supply unit, thereby solving the technical problems in the prior art that the heating power supply of the physical therapy apparatus has low safety and electromagnetic radiation cannot meet the requirements in the process of realizing high-power heating, thereby achieving the technical effects of improving the safety of the circuit and reducing the electromagnetic radiation of the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural diagram of a temperature control circuit provided by an embodiment of the utility model;

[0032] Figure 2 It is a circuit diagram of a temperature control circuit provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] It should be noted that the terms "first", "second", etc. in the specification, claims and drawings of the utility model are used to distinguish different objects, rather than to limit a specific order. The following embodiments of the utility model can be implemented separately, and the embodiments can also be implemented in combination with each other, and the embodiments of the utility model do not make specific limitations on this.

[0035] Figure 1 It is a structural diagram of a temperature control circuit provided by an embodiment of the utility model.

[0036] like Figure 1 As shown, the temperature control circuit includes a control unit 10, an optical coupler U1, a thyristor Q1, a 36V AC power supply unit 20 and a heating output interface J2;

[0037] The control unit 10 is electrically connected to the main control board through the first socket J1; the optical coupler U1 is electrically connected to the control unit 10; the thyristor Q1 is electrically connected to the optical coupler U1; the 36V AC power supply unit 20 is electrically connected to the thyristor Q1; the heating output interface J2 is electrically connected to the thyristor Q1 and the 36V AC power supply unit 20 respectively; the heating output interface J2 is used to connect the device to be heated;

[0038] The optical coupler U1 is started under the control of the control unit 10 and controls the thyristor Q1 to be turned on. The 36V AC power supply unit 20 supplies power to the thyristor Q1, and the thyristor Q1 heats the device to be heated through the heating output interface J2.

[0039] Specifically, the main control board provided in the physical therapy apparatus controls the control unit 10 through the first socket J1. The control unit 10 controls the start-up of the optocoupler U1 based on the instruction of the main control board. After startup, the optocoupler U1 controls the conduction of the thyristor Q1 as a heating device, and the thyristor Q1 begins to heat the device to be heated connected through the heating output interface J2. Exemplarily, the device to be heated can be a device that needs to be heated, such as a seat cushion and a heating pad. The optocoupler U1 can isolate the main control board from the thyristor Q1. The 36V AC power supply unit 20 supplies power to the thyristor Q1 to heat the thyristor Q1. The heating function of the thyristor Q1 is realized by using a low voltage, so that the temperature control circuit is both safe and stable, and can pass the electromagnetic radiation detection well.

[0040] In an optional implementation, the model of the optocoupler U1 can be MOC3022, and the model of the thyristor Q1 can be BTA16-600B or BTA24-600B.

[0041] The present application controls the start-up of the optocoupler through a control unit, uses the optocoupler to control the conduction of the thyristor, and uses a 36V AC power supply unit to power the thyristor, thereby solving the technical problems in the prior art that the heating power supply of the physical therapy device has low safety and electromagnetic radiation cannot meet the requirements during the process of realizing high-power heating, and achieves the technical effect of improving the safety of the circuit and reducing the electromagnetic radiation of the circuit.

[0042] Figure 2 It is a circuit diagram of a temperature control circuit provided by an embodiment of the utility model.

[0043] Alternatively, if Figure 2 As shown, the 36V AC power supply unit 20 includes a second socket J3 and a toroidal transformer ( Figure 2 The toroidal transformer is not shown in the figure); the second socket J3 is connected to the mains via the toroidal transformer; the toroidal transformer is used to convert the 220V AC mains into 36V AC, and feed it into the thyristor Q1 via the second socket J3.

[0044] Specifically, the toroidal transformer can isolate the AC220V mains power and output AC36V, which is then fed into the thyristor Q1 through the second socket J3, so as to control the thyristor Q1 with low voltage for heating.

[0045] Alternatively, if Figure 2 As shown, the control unit 10 includes a first resistor R1, a second resistor R2 and a first transistor Q2; the first end of the first resistor R1 is electrically connected to the first socket J1, the first end of the first resistor R1 is electrically connected to the first power supply VCC, and the second end of the first resistor R1 is electrically connected to the positive electrode of the light-emitting diode in the optocoupler U1; the first end of the second resistor R2 is electrically connected to the first socket J1, and the second end of the second resistor R2 is electrically connected to the base of the first transistor Q2; the collector of the first transistor Q2 is electrically connected to the negative electrode of the light-emitting diode in the optocoupler U1, and the emitter of the first transistor Q2 is grounded GND; the emitter of the first transistor Q2 is electrically connected to the first socket J1.

[0046] Specifically, the main control board is the control element of the physical therapy instrument where the temperature control circuit is located. The main control board provides a high level to the base of the first transistor Q2 through the first socket J1, and the first transistor Q2 is turned on. The first power supply VCC is usually +5V, and flows to the light-emitting diode in the optical coupler U1 through the first resistor R1, and the optical coupler U1 is turned on. After the optical coupler U1 is turned on, a level signal is sent to the control end of the thyristor Q1 to turn on the thyristor Q1, and the device to be heated is heated through the heating output interface J2.

[0047] Alternatively, if Figure 2 As shown, the temperature control circuit further includes a voltage dividing unit 30 , which is disposed between the optical coupler U1 and the thyristor Q1 .

[0048] Alternatively, if Figure 2 As shown, the voltage dividing unit 30 includes a third resistor R3 and a fourth resistor R4; the first end of the third resistor R3 is electrically connected to the first end of the bidirectional trigger diode in the optocoupler U1, and the second end of the third resistor R3 is electrically connected to the positive terminal V+ of the second socket J3 of the 36V AC power supply unit 20; the first end of the fourth resistor R4 is electrically connected to the second end of the bidirectional trigger diode in the optocoupler U1, and the second end of the fourth resistor 4 is electrically connected to the heating output interface J2; the first end of the fourth resistor R4 is electrically connected to the control end of the thyristor Q1.

[0049] Specifically, the voltage dividing unit 30 composed of the third resistor R3 and the fourth resistor R4 is used to distribute the voltage transmitted by the optical coupler U1 to turn on the thyristor Q1 , and the control end of the thyristor Q1 is the control gate of the thyristor Q1 .

[0050] Alternatively, if Figure 2 As shown, the temperature control circuit further includes a first filter unit 40 and a second filter unit 50 ; the first filter unit 40 is disposed between the thyristor Q1 and the voltage divider unit 30 ; the second filter unit 50 is disposed between the thyristor Q1 and the 36V AC power supply unit 20 .

[0051] Alternatively, if Figure 2 As shown, the first filtering unit 40 includes a fifth resistor R5 and a first capacitor C1; the second filtering unit 50 includes a sixth resistor R6 and a second capacitor C2; the first end of the fifth resistor R5 is electrically connected to the first end of the third resistor R3, the second end of the fifth resistor R5 is electrically connected to the positive electrode of the thyristor Q1, and the second end of the fifth resistor R5 is electrically connected to the positive terminal V+ of the second socket J3 of the 36V AC power supply unit 20; the first end of the first capacitor C1 is electrically connected to the first end of the fifth resistor R5, and the second end of the first capacitor C1 is electrically connected to the heating output interface J2; the first end of the second capacitor C2 is electrically connected to the positive terminal V+ of the second socket J3 of the 36V AC power supply unit 20, the second end of the second capacitor C2 is electrically connected to the first end of the sixth resistor R6, and the second end of the sixth resistor R6 is electrically connected to the heating output interface J2; the negative terminal V- of the second socket J3 of the 36V AC power supply unit 20 is electrically connected to the heating output interface J2.

[0052] Alternatively, if Figure 2 As shown, the temperature control circuit further includes a resettable fuse RF1 ; the resettable fuse RF1 is arranged between the second filter unit 50 and the 36V AC power supply unit 20 .

[0053] Specifically, the resettable fuse RF1 can achieve self-recovery. When the current is too high, it is disconnected to protect the circuit. When the current returns to a normal value, the resettable fuse RF1 can automatically restore the connection.

[0054] An embodiment of the utility model further provides a physical therapy apparatus, which comprises the temperature control circuit in any of the above embodiments.

[0055] The physical therapy apparatus provided in the embodiment of the utility model includes the temperature control circuit in the above embodiment. Therefore, the physical therapy apparatus provided in the embodiment of the utility model also has the beneficial effects described in the above embodiment, which will not be described in detail here.

[0056] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] Finally, it should be noted that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A temperature control circuit, characterized in that: The temperature control circuit includes a control unit, an optical coupler, a thyristor, a 36V AC power supply unit and a heating output interface; The control unit is electrically connected to the main control board through the first socket; the optical coupler is electrically connected to the control unit; the thyristor is electrically connected to the optical coupler; the 36V AC power supply unit is electrically connected to the thyristor; the heating output interface is electrically connected to the thyristor and the 36V AC power supply unit respectively; the heating output interface is used to connect the device to be heated; The optical coupler is started under the control of the control unit and controls the thyristor to be turned on. The 36V AC power supply unit supplies power to the thyristor, and the thyristor heats the device to be heated through the heating output interface.

2. The temperature control circuit according to claim 1, characterized in that: The 36V AC power supply unit includes a second socket and a toroidal transformer; The second socket is electrically connected to the mains via the toroidal transformer; The toroidal transformer is used to convert 220V AC mains power into 36V AC power, and feed the power into the thyristor through the second socket.

3. The temperature control circuit according to claim 1, characterized in that: The control unit includes a first resistor, a second resistor and a first transistor; The first end of the first resistor is electrically connected to the first socket, the first end of the first resistor is electrically connected to the first power supply, and the second end of the first resistor is electrically connected to the positive electrode of the light emitting diode in the optocoupler; A first end of the second resistor is electrically connected to the first socket, and a second end of the second resistor is electrically connected to the base of the first transistor; The collector of the first transistor is electrically connected to the cathode of the light emitting diode in the optocoupler, the emitter of the first transistor is grounded; and the emitter of the first transistor is electrically connected to the first socket.

4. The temperature control circuit according to claim 1, characterized in that: The temperature control circuit further includes a voltage dividing unit, and the voltage dividing unit is arranged between the optical coupler and the thyristor.

5. The temperature control circuit according to claim 4, characterized in that: The voltage dividing unit includes a third resistor and a fourth resistor; The first end of the third resistor is electrically connected to the first end of the bidirectional trigger diode in the optical coupler, and the second end of the third resistor is electrically connected to the positive terminal of the second socket of the 36V AC power supply unit; The first end of the fourth resistor is electrically connected to the second end of the bidirectional trigger diode in the optical coupler, and the second end of the fourth resistor is electrically connected to the first end of the third socket of the heating output interface; The first end of the fourth resistor is electrically connected to the control end of the thyristor.

6. The temperature control circuit according to claim 5, characterized in that: The temperature control circuit further includes a first filtering unit and a second filtering unit; The first filtering unit is arranged between the thyristor and the voltage dividing unit; the second filtering unit is arranged between the thyristor and the 36V AC power supply unit.

7. The temperature control circuit according to claim 6, characterized in that: The first filtering unit includes a fifth resistor and a first capacitor; the second filtering unit includes a sixth resistor and a second capacitor; The first end of the fifth resistor is electrically connected to the first end of the third resistor, the second end of the fifth resistor is electrically connected to the positive electrode of the thyristor, and the second end of the fifth resistor is electrically connected to the positive terminal of the second socket of the 36V AC power supply unit; The first end of the first capacitor is electrically connected to the first end of the fifth resistor, and the second end of the first capacitor is electrically connected to the heating output interface; The first end of the second capacitor is electrically connected to the positive terminal of the second socket of the 36V AC power supply unit, the second end of the second capacitor is electrically connected to the first end of the sixth resistor, and the second end of the sixth resistor is electrically connected to the heating output interface; The negative power end of the second socket of the 36V AC power supply unit is electrically connected to the heating output interface.

8. The temperature control circuit according to claim 7, characterized in that: The temperature control circuit also includes a resettable fuse; The resettable fuse is arranged between the second filter unit and the 36V AC power supply unit.

9. A physical therapy apparatus, characterized in that: The physical therapy device comprises the temperature control circuit according to any one of claims 1 to 8 above.

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