Electromagnetic wave therapy device
By combining a phase comparator and a current detection device with temperature and angle sensors, leakage protection for the electromagnetic wave therapy device is achieved, which solves the safety hazards of the electromagnetic wave therapy device when in contact with water and air, and improves the safety and reliability of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING ZHONGZHI MEDICAL INSTR CO LTD
- Filing Date
- 2025-02-12
- Publication Date
- 2026-07-14
AI Technical Summary
Existing electromagnetic wave therapy devices may cause short circuits or leakage when in contact with water vapor or water mist, posing safety hazards, especially when used in the home where effective protective measures are lacking.
Leakage protection is achieved by using a phase comparator and a current detection device. By detecting the current difference and magnetic field phase shift between the live wire and the neutral wire, the switch chip is controlled to disconnect the circuit, replacing the traditional grounding wire function. Temperature and angle sensors are also combined to improve safety.
This effectively avoids safety accidents caused by open circuits, short circuits, leakage, overheating, and abnormal angles in electromagnetic wave therapy devices, thus improving the safety and reliability of the equipment.
Smart Images
Figure CN224484727U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical equipment technology, and in particular to an electromagnetic wave therapy device. Background Technology
[0002] In modern medicine, irradiation therapy has gradually become a widely used medical method. Whether it is large-scale irradiation for severe cases or small-scale physical examination and physiotherapy, various irradiation medical devices play a key role.
[0003] In medical activities involving physical examination and physiotherapy, a commonly used medical device is the Specific Electromagnetic Spectrum Therapy Device (TDP), also known as the TDP Therapy Device. This device utilizes the electromagnetic radiation effect (thermal effect) for treatment. Its core component, the TDP therapy plate, is made with a coating of over 30 specially selected elements. Under certain temperatures, the TDP therapy plate generates electromagnetic waves carrying characteristic information of various elements, with wavelengths between 2 and 25 micrometers. These waves are easily absorbed by the human body, resonating with corresponding elements within the body. This enhances metabolism, promotes the arrangement of elements within cells, thereby increasing the activity of various enzymes, strengthening the absorption of deficient elements, adjusting the relative balance of elements in the body, and improving the body's immune function and disease resistance.
[0004] Currently, electromagnetic wave therapy devices are classified as Class II devices. To facilitate home use, existing electromagnetic wave therapy devices no longer include a grounding wire. However, electromagnetic wave therapy devices are often used in conjunction with other therapeutic devices or medications. The treatment process may involve the use of vapor therapy, moist heat physical therapy, liquid medications, medicated patches, disinfectant liquids, etc. Because the heating of the electromagnetic wave therapy device can cause the evaporation or condensation of moisture, producing water vapor or water mist, prolonged contact between the electromagnetic wave therapy device and water vapor or water mist may lead to short circuits or leakage, potentially causing safety accidents and compromising the safe use of the device. Utility Model Content
[0005] The purpose of this invention is to provide an electromagnetic wave therapy device that achieves leakage protection through a phase comparator and a current detection device, replacing the traditional grounding wire function and providing high safety.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: an electromagnetic wave therapy device, comprising a controller, a switching chip, a current detection device, a phase comparator, and a load. The electromagnetic wave therapy device is provided with a power supply circuit. The switching chip is electrically connected to the controller and is coupled in the live wire path of the power supply circuit for controlling the on / off state of the power supply circuit.
[0007] The current detection device is coupled to the live wire of the power supply circuit to detect the current difference between the live wire and the neutral wire in real time and generate a detection signal.
[0008] The phase comparator is electrically connected to the current detection device and the controller, and is used to determine whether the phase offset of the detection signal exceeds the preset range;
[0009] The load is electrically connected to the output of the phase comparator.
[0010] The technical principle of this utility model is as follows: After the device is powered on, the power supply circuit supplies power to the load in part and to the controller in the other part. When the load fails, the power supply circuit is broken, there is no current in the current detection device, and the controller controls the switching chip to disconnect the circuit to prevent leakage.
[0011] A current detection device is coupled to the live wire via a current transformer to detect current. Both the live and neutral wires pass through the phase comparator. According to Ampere's law, current generates a magnetic field. Under normal circumstances, the currents in the live and neutral wires are equal in magnitude and opposite in direction, so their magnetic fields cancel each other out, and the phase comparator detects no electromagnetic signal.
[0012] When this device experiences a leakage current, some current will flow to the ground through the human body or other pathways. The current in the live wire will be greater than the current in the neutral wire, resulting in a significant difference between the currents in the live and neutral wires. At this point, the magnetic fields of the live and neutral wires no longer completely cancel each other out. The phase comparator detects the remaining magnetic field (i.e., differential current) and generates a corresponding signal. The strength of the signal is proportional to the current difference between the live and neutral wires (i.e., leakage current). When the signal strength exceeds a preset threshold, leakage is identified. The phase comparator sends the signal to the controller, which then controls the switching chip to disconnect the circuit, preventing leakage. Leakage protection is achieved through the phase comparator and current detection device, replacing the traditional grounding wire function.
[0013] When a short circuit occurs in this device, the current in the live wire will increase sharply. At this time, the current detection device will detect the abnormal current, and the controller will control the switching chip to disconnect the circuit to avoid safety accidents.
[0014] Furthermore, the preset threshold for the current difference corresponding to the phase offset of the phase comparator is 30mA.
[0015] Furthermore, it also includes a temperature detection device connected in series with the load to detect whether the load is overheating.
[0016] Furthermore, the temperature detection device is set to a threshold of 135°C.
[0017] Furthermore, it also includes an angle sensor electrically connected to the controller.
[0018] Furthermore, it also includes an alarm device that is electrically connected to the controller.
[0019] The beneficial effects of this utility model are as follows:
[0020] 1. When this equipment has an open circuit, short circuit, or leakage, the circuit can be disconnected under the action of the phase comparator and the current detection device to avoid leakage and improve the safety of this equipment.
[0021] 2. With the combined action of the phase comparator and the current detection device, this equipment can distinguish between normal current fluctuations and abnormal currents, thereby further improving the safety of the equipment;
[0022] 3. The temperature detection device is equipped with a thermal protector and is connected in series with the load. When the load overheats, the thermal protector will trip, and there will be no current in the current detection device. The controller will then control the switching chip to disconnect the circuit to prevent accidents.
[0023] 4. When the tilt angle of the device exceeds the set value, the angle sensor will send a signal to the controller, which will then control the switch chip to disconnect the circuit to prevent safety accidents caused by using the device at abnormal angles. Attached Figure Description
[0024] Figure 1 This is a logic block diagram of the present invention;
[0025] Figure 2 This is a block diagram illustrating the working principle of this utility model;
[0026] Figure 3 Electrical schematic diagram of the core part of this utility model;
[0027] Figure 4 This is a structural diagram of the present invention.
[0028] In the above attached diagram: 1. Lamp holder; 2. Integrated box; 3. Support rod. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments; the structures described in various embodiments can be freely combined without conflict in terms of structure or principle.
[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0032] The following description, in conjunction with the accompanying drawings, describes some embodiments of the present invention:
[0033] like Figures 1-4 As shown, this utility model proposes an electromagnetic wave therapy device, including a controller, a switching chip, a current detection device, a phase comparator and a load. The electromagnetic wave therapy device is provided with a power supply circuit. The switching chip is electrically connected to the controller and is coupled in the live wire path of the power supply circuit to control the on and off of the power supply circuit.
[0034] The current detection device is coupled to the live wire of the power supply circuit to detect the current difference between the live wire and the neutral wire in real time and generate a detection signal.
[0035] The phase comparator is electrically connected to the current detection device and the controller, and is used to determine whether the phase offset of the detection signal exceeds the preset range;
[0036] The load is electrically connected to the output of the phase comparator, and the load is the lamp holder heating element.
[0037] The controller, switching chip, and phase comparator are all installed in integrated box 2. This device includes a rectifier and a timing device. The timing time can be adjusted via a timing knob, making operation convenient. The timing device is a mechanical rotary timer, model AT-603H. The rectifier uses a switching power supply chip, which converts 220V AC voltage to 3-5V DC voltage for the controller's operation. After the device is powered on, the power supply circuit supplies power to the load in one part and to the controller in the other. The controller's main control chip is AT89LP2052, and the switching chip is a BT137 bidirectional thyristor. When a load failure occurs, the power supply circuit breaks, and there is no current in the current detection device. The controller then controls the switching chip to disconnect the circuit to prevent leakage. The current detection device uses a sampling resistor, detecting the current by testing the voltage across the resistor. The sampling resistor is a low-resistance resistor, which reduces the device's power consumption and heat generation.
[0038] A current detection device is coupled to the live wire via a current transformer to detect current. Both the live and neutral wires pass through the phase comparator. According to Ampere's law, current generates a magnetic field. Under normal circumstances, the currents in the live and neutral wires are equal in magnitude and opposite in direction, so their magnetic fields cancel each other out, and the phase comparator detects no electromagnetic signal.
[0039] When this device experiences a leakage current, some current will flow to the ground through the human body or other pathways. The current in the live wire will be greater than that in the neutral wire, resulting in a significant difference between the currents in the live and neutral wires. At this point, the magnetic fields of the live and neutral wires are no longer completely canceled out. The phase comparator detects the remaining magnetic field (i.e., differential current) and generates a corresponding signal. The strength of the signal is proportional to the current difference between the live and neutral wires (i.e., leakage current). When the signal strength exceeds a preset threshold, leakage is identified. The phase comparator sends the signal to the controller, which then controls the switching chip to disconnect the circuit, preventing leakage. In this device, leakage protection is achieved through a phase comparator and a current detection device, replacing the traditional grounding wire function. The preset threshold for the phase offset corresponding to the current difference in the phase comparator is 30mA to prevent fatal injury from leakage, ensuring high safety.
[0040] When a short circuit occurs in this device, the current in the live wire will increase sharply. At this time, the current detection device will detect the abnormal current, and the controller will control the switching chip to disconnect the circuit to prevent a safety accident. Simultaneously, this device is equipped with a current-limiting fuse. In the event of a short circuit, the current-limiting fuse can quickly limit the peak current, preventing the current from reaching dangerous levels and improving the safety of this device.
[0041] With the combined action of the phase comparator and the current detection device, this equipment can distinguish between normal current fluctuations and current anomalies, thereby further improving the safety of the equipment.
[0042] Furthermore, it also includes a temperature detection device connected in series with the load to detect whether the load is overheating, and the temperature detection device is installed inside the lamp holder 1.
[0043] The temperature detection device is equipped with a thermal protector (KSD9700). The thermal protector's set threshold is 135℃. When the load temperature exceeds the set temperature for a period of time or exceeds the set temperature by too much, the thermal protector will disconnect, forming an open circuit. There will be no current in the current detection device, and the controller will control the switching chip to disconnect the circuit to avoid safety accidents.
[0044] Furthermore, such as Figure 4 As shown, it also includes an angle sensor electrically connected to the controller.
[0045] An angle sensor is installed inside the integrated box 2. The set threshold of the angle sensor is 45°. The device is installed on the support rod 3. When the tilt angle of the support rod 3 exceeds 45° in the vertical direction, the angle sensor will send a signal to the controller. The controller will control the switch chip to disconnect the circuit to avoid safety accidents caused by using the device at abnormal angles.
[0046] Furthermore, it also includes an alarm device that is electrically connected to the controller.
[0047] The alarm device is installed in the integrated box 2. The alarm device can promptly notify the operator and eliminate abnormalities, which can further improve the safety of the equipment.
Claims
1. An electromagnetic wave therapy device, characterized in that: It includes a controller, a switching chip, a current detection device, a phase comparator, and a load. The electromagnetic wave therapy device is equipped with a power supply circuit. The switching chip is electrically connected to the controller and is coupled in the live wire path of the power supply circuit to control the on and off of the power supply circuit. The current detection device is coupled to the live wire of the power supply circuit to detect the current difference between the live wire and the neutral wire in real time and generate a detection signal. The phase comparator is electrically connected to the current detection device and the controller, and is used to determine whether the phase offset of the detection signal exceeds the preset range; The load is electrically connected to the output of the phase comparator.
2. The electromagnetic wave therapy device according to claim 1, characterized in that, The preset threshold for the current difference corresponding to the phase offset of the phase comparator is 30mA.
3. An electromagnetic wave therapy device according to claim 1 or 2, characterized in that, It also includes a temperature detection device connected in series with the load to detect whether the load is overheating.
4. An electromagnetic wave therapy device according to claim 3, characterized in that, The temperature detection device is set to a threshold of 135℃.
5. An electromagnetic wave therapy device according to claim 1, 2, or 4, characterized in that, It also includes an angle sensor that is electrically connected to the controller.
6. An electromagnetic wave therapy device according to claim 3, characterized in that, It also includes an angle sensor that is electrically connected to the controller.
7. An electromagnetic wave therapy device according to claim 1, 2, 4 or 6, characterized in that, It also includes an alarm device that is electrically connected to the controller.
8. An electromagnetic wave therapy device according to claim 3, characterized in that, It also includes an alarm device that is electrically connected to the controller.
9. An electromagnetic wave therapy device according to claim 5, characterized in that, It also includes an alarm device that is electrically connected to the controller.