Temperature control circuit and intelligent massager

Abstract

The application discloses a temperature control circuit and an intelligent massager, relates to the technical field of heating and temperature measurement, and comprises a control unit, a temperature detection unit, a heating control unit, and the first end of the temperature detection unit is connected with the first end of the control unit; the first end of the heating control unit is connected with the second end of the control unit, and the second end of the heating control unit is connected with the second end of the temperature detection unit and then connected with a grounding end; wherein the temperature detection unit and the heating control unit alternately form a working loop with the grounding end to separately realize temperature measurement and heating functions. The application improves the integration of the temperature control circuit.

Description

Technical Field

[0001] This application relates to the field of heating and temperature measurement technology, and in particular to a temperature control circuit and an intelligent massager. Background Technology

[0002] As the demand for heating and temperature measurement increases in various fields, users are also placing higher demands on temperature control circuits.

[0003] Traditional temperature control circuits require separate heating and temperature measurement units, with each unit performing heating and temperature measurement functions separately. This type of temperature control circuit has a significant drawback: the need for separate heating and temperature measurement units to achieve these functions results in low integration of the temperature control circuit.

[0004] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is prior art. Utility Model Content

[0005] The main purpose of this application is to provide a temperature control circuit and an intelligent massager, aiming to solve the technical problem of low integration of temperature control circuits.

[0006] To achieve the above objectives, this application provides a temperature control circuit, which includes: Control unit; A temperature detection unit, wherein the first end of the temperature detection unit is connected to the first end of the control unit; A heating control unit, wherein a first end of the heating control unit is connected to a second end of the control unit, and the second end of the heating control unit is connected to a second end of the temperature detection unit and then connected to a grounding terminal, wherein the temperature detection unit and the heating control unit alternately form a working circuit with the grounding terminal to separately realize the temperature measurement and heating functions.

[0007] In one embodiment, the temperature detection unit includes: A first resistor, the first end of which is connected to the power supply, and the second end of which serves as the first end of the temperature detection unit and is connected to the first end of the control unit. A temperature resistor, the first end of which is connected to the second end of the first resistor, the second end of which serves as the second end of the temperature detection unit and is connected to the grounding terminal and the second end of the heating control unit.

[0008] In one embodiment, the temperature detection unit further includes: A first diode, the anode of which is connected to the second terminal of the temperature resistor, and the cathode of which serves as the second terminal of the temperature detection unit and is connected to the ground terminal and the second terminal of the heating control unit, or; The first switching transistor has its first end connected to its third end and then connected to the second end of the temperature resistor. The second end of the first switching transistor serves as the second end of the temperature detection unit and is connected to the grounding terminal and the second end of the heating control unit.

[0009] In one embodiment, the heating control unit includes a power control subunit, a signal control subunit, and a heating subunit. The first end of the signal control subunit serves as the first end of the heating control unit and is connected to the second end of the control unit. The second end of the signal control subunit is connected to the first end of the power control subunit. The second end of the power control subunit is connected to the first end of the heating subunit. The second end of the heating subunit serves as the second end of the heating control unit and is connected to the second end of the temperature detection unit and the grounding terminal.

[0010] In one embodiment, the signal control subunit includes: The second resistor has its first end serving as the first end of the signal control subunit and connected to the second end of the control unit. A third resistor, the first end of which is connected to the second end of the second resistor, and the second end of the third resistor is grounded; The transistor has its third terminal connected to the second terminal of the second resistor, and its second terminal grounded. The first terminal of the transistor serves as the second terminal of the signal control subunit and is connected to the first terminal of the power control subunit.

[0011] In one embodiment, the power control subunit includes: The fourth resistor has its first end connected to the power supply, and its second end serves as the first end of the power control subunit and is connected to the first end of the transistor. The second switch has its second end connected to the first end of the fourth resistor, its third end connected to the second end of the fourth resistor, and its first end serving as the second end of the power control subunit and connected to the first end of the heating subunit.

[0012] In one embodiment, the heating subunit includes: A heating resistor, wherein the first end of the heating resistor serves as the first end of the heating subunit and is connected to the first end of the second switching transistor, and the second end of the heating resistor serves as the second end of the heating subunit and is connected to the second end of the temperature detection unit and the grounding terminal.

[0013] In one embodiment, the heating subunit further includes: The second diode has its anode connected to the second terminal of the heating resistor, and its cathode serving as the second terminal of the heating subunit, and connected to the second terminal of the temperature detection unit and the ground terminal, or; The third switch is connected to the second terminal of the heating resistor after its first terminal is connected to the third terminal of the heating unit. The second terminal of the third switch serves as the second terminal of the heating subunit and is connected to the second terminal of the temperature detection unit and the ground terminal.

[0014] In addition, to achieve the above objectives, a smart massager is also provided, which includes the temperature control circuit described above.

[0015] In one embodiment, the smart massager further includes: A heating device, wherein a temperature resistor and a heating resistor are provided in the temperature control circuit.

[0016] This application provides a temperature control circuit, including a control unit; a temperature detection unit, the first end of which is connected to the first end of the control unit; and a heating control unit, the first end of which is connected to the second end of the control unit, the second end of which is connected to the second end of the temperature detection unit and then to a ground terminal. The temperature detection unit and the heating control unit alternately form working loops with the ground terminal to separately achieve temperature measurement and heating functions. This temperature control circuit, by connecting the second end of the heating control unit to the second end of the temperature detection unit and then to the ground terminal, allows the temperature detection unit and the heating control unit to alternately form working loops with the ground terminal to separately achieve temperature measurement and heating functions. This avoids the need for separate heating and temperature measurement units to achieve heating and temperature measurement functions. This temperature control circuit allows the temperature detection unit and the heating control unit to alternately form working loops with the ground terminal to separately achieve temperature measurement and heating functions, i.e., using an integrated temperature control circuit to achieve temperature measurement and heating functions, thereby improving the integration of the temperature control circuit. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the framework of the first embodiment of the temperature control circuit of this application; Figure 2A circuit connection diagram of a temperature control circuit; Figure 3 This is a schematic diagram of the first circuit connection of the second embodiment of the temperature control circuit of this application; Figure 4 This is a schematic diagram of a second circuit connection according to a second embodiment of the temperature control circuit of this application; Figure 5 This is a schematic diagram of a third circuit connection for the second embodiment of the temperature control circuit of this application; Figure 6 This is a schematic diagram of the first circuit connection of the third embodiment of the temperature control circuit of this application; Figure 7 This is a schematic diagram of the second circuit connection of the third embodiment of the temperature control circuit of this application; Figure 8 This is a schematic diagram of a third circuit connection according to a third embodiment of the temperature control circuit of this application; Figure 9 This is a circuit connection diagram of the fourth embodiment of the temperature control circuit of this application; Figure 10 This is a schematic diagram of a control waveform of the temperature control circuit of this application.

[0018] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0019] Explanation of icon numbers: 100, Control board; 200, Heating device; 10, Control unit; 20, Temperature detection unit; 30, Heating control unit; 310, Temperature measurement unit; 320, Heating unit; RG1, First grounding resistor; RG2, Second grounding resistor; RG, Grounding resistor; R1, First resistor; VCC, Power supply; RT, Temperature resistor; D1, First diode; T1, First switching transistor; 3A, Signal control subunit; 3B, Power control subunit; 3C, Heating subunit; R2, Second resistor; R3, Third resistor; R4, Fourth resistor; Q, Transistor; T2, Second switching transistor; RH, Heating resistor; D2, Second diode; T3, Third switching transistor. Detailed Implementation

[0020] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0021] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0022] Traditional temperature control circuits typically include separate heating units 320 and temperature sensing units 310. This not only increases the number of wiring connections between the control board 100 and the heating device 200 (where the control board 100 is generally the location of the circuit design, such as a PCB), and the heating device 200 refers to the heating component, such as an integrated heating resistor), but also results in low integration of the overall temperature control circuit. For example, see [reference needed]. Figure 2 , Figure 2 This is a schematic diagram of an improved temperature control circuit. In the diagram, the first resistor R1, the fourth resistor R4, and the second switching transistor T2 are mounted on the control board 100. The temperature-sensing resistor RT and the heating resistor RH are mounted on the heating device 200. The first grounding resistor RG1 and the second grounding resistor RG2 represent the resistance of the wires between the control board 100 and the heating device 200. The power supply VCC powers the heating resistor RH in the heating device 200. The control unit 10 outputs a PWM (Pulse Width Modulation) square wave to control the switching of the heating device 200 and the heating rate. The power supply VCC powers the temperature-sensing unit 310. The temperature measurement structure is obtained by dividing the power supply VCC using the first resistor R1, the temperature-sensing resistor RT, and the first grounding resistor RG1. After acquiring the voltage, the control unit 10 can calculate the instantaneous temperature of the heating device. As shown in the diagram, because the heating unit 320 and the temperature-sensing unit 310 are designed independently, the integration of the entire temperature control circuit is not high.

[0023] Therefore, based on the shortcomings of the above interface methods, the temperature control circuit of this application is proposed: after connecting the second terminal of the heating control unit 30 to the second terminal of the temperature detection unit 20 and then to the ground terminal, the temperature detection unit 20 and the heating control unit 30 can alternately form working loops with the ground terminal to separately realize the temperature measurement and heating functions. This avoids the phenomenon that heating units and temperature measurement units need to be set separately to realize the heating and temperature measurement functions. This temperature control circuit can alternately form working loops with the temperature detection unit 20 and the heating control unit 30 with the ground terminal to separately realize the temperature measurement and heating functions. That is, the temperature measurement and heating functions are realized by using an integrated temperature control circuit to improve the integration of the temperature control circuit.

[0024] Based on this, the embodiments of this application provide a temperature control circuit, referring to... Figure 1 , Figure 1 This is a schematic diagram of the framework of the first embodiment of the temperature control circuit of this application.

[0025] Reference Figure 1This application provides a temperature control circuit, which includes: Control unit 10; Temperature detection unit 20, the first end of temperature detection unit 20 is connected to the first end of control unit 10; The heating control unit 30 has its first end connected to the second end of the control unit 10. The second end of the heating control unit 30 is connected to the second end of the temperature detection unit 20 and then to the grounding end. The temperature detection unit 20 and the heating control unit 30 alternately form a working circuit with the grounding end to separately realize the temperature measurement and heating functions.

[0026] In this embodiment, to improve the integration of the temperature control circuit, the original heating unit 320 and temperature measuring unit 310 are integrated, and the internal control components are changed to avoid mutual interference between them. For example, the first terminal of the temperature detection unit 20 is connected to the first terminal of the control unit 10, and the first terminal of the heating control unit 30 is connected to the second terminal of the control unit 10. Simultaneously, the temperature detection unit 20 and the heating control unit 30 alternately form working loops with the ground terminal to separately implement the temperature measurement and heating functions. The entire system uses the shared ground terminal of the temperature detection unit 20 and the heating control unit 30, and alternately uses the ground terminal to form working loops to separately implement the temperature measurement and heating functions. That is, the two functions are not used simultaneously, which improves the integration of the temperature control circuit while ensuring the normal implementation of the temperature measurement and heating functions.

[0027] In one embodiment, the control unit 10 can be mounted on the control board 100 or in other locations, depending on the actual situation. Similarly, the grounding terminal can also be mounted on the control board 100 or in other locations. Furthermore, the temperature sensing element in the temperature detection unit 20 can be located at a temperature sensing position. A temperature sensing position refers to the location where temperature detection is required. For example, if the heating device 200 is measuring the temperature of a component, the temperature sensing position can be directly the location where the component is attached. Similarly, the heating element in the heating control unit 30 can be located at a heating position. A heating position refers to the location where heating is required. For example, if the heating device 200 is heating a component, the heating position can be directly the location where the component is attached. This is not limited to any particular location.

[0028] In this embodiment, a temperature control circuit is provided, including a control unit 10; a temperature detection unit 20, the first end of which is connected to the first end of the control unit 10; and a heating control unit 30, the first end of which is connected to the second end of the control unit 10, and the second end of which is connected to the second end of the temperature detection unit 20 and then to a ground terminal. The temperature detection unit 20 and the heating control unit 30 alternately form working loops with the ground terminal to separately achieve temperature measurement and heating functions. This temperature control circuit, by connecting the second end of the heating control unit 30 to the second end of the temperature detection unit 20 and then to the ground terminal, allows the temperature detection unit 20 and the heating control unit 30 to alternately form working loops with the ground terminal to separately achieve temperature measurement and heating functions. This avoids the need for separate heating and temperature measurement units to achieve heating and temperature measurement functions. This temperature control circuit allows the temperature detection unit 20 and the heating control unit 30 to alternately form working loops with the ground terminal to separately achieve temperature measurement and heating functions, i.e., using an integrated temperature control circuit to achieve temperature measurement and heating functions, thereby improving the integration of the temperature control circuit.

[0029] Furthermore, based on the first embodiment of this application described above, a second embodiment of the temperature control circuit of this application is proposed, referring to... Figure 3 , Figure 3 This is a schematic diagram of a first circuit connection of a second embodiment of the temperature control circuit of this application. The temperature detection unit 20 includes: The first resistor R1 has its first end connected to the power supply VCC, and its second end serves as the first end of the temperature detection unit 20 and is connected to the first end of the control unit 10.

[0030] Temperature resistor RT, the first end of temperature resistor RT is connected to the second end of first resistor R1, the second end of temperature resistor RT serves as the second end of temperature detection unit 20, and is connected to ground terminal and the second end of heating control unit 30.

[0031] In this embodiment, the temperature detection unit 20 consists of a first resistor R1 and a power supply VCC. Combined with a temperature resistor RT at the temperature measurement location, it can measure the temperature at that location. For example, refer to... Figure 3The first resistor R1, the temperature resistor RT, and the ground terminal are connected in series to divide the voltage across the power supply VCC. The temperature value can then be determined based on the voltage divided by the first resistor R1. For example, if the voltage divided by the first resistor R1 is A1, then the temperature value supplied to the control unit 10 at this time is S1. The principle is that the resistance of the temperature resistor RT is different at different temperatures, thus creating different voltage divisions across the first resistor R1 to determine the temperature value. The temperature resistor RT can be an NTC (Negative Temperature Coefficient) resistor. Based on the above circuit design, temperature detection at the measurement location can be achieved, thus realizing the temperature detection function. Of course, the entire temperature detection unit can also be designed in other ways, such as using current protection or a design that detects multiple locations simultaneously, which is not limited here.

[0032] In another embodiment, reference is made to Figure 4 , Figure 4 This is a schematic diagram of a second circuit connection for a second embodiment of the temperature control circuit of this application. The temperature detection unit 20 further includes: The first diode D1 has its anode connected to the second terminal of the temperature resistor RT, and its cathode serves as the second terminal of the temperature detection unit 20, and is connected to the ground terminal and the second terminal of the heating control unit 30, or; Reference Figure 5 , Figure 5 This is a schematic diagram of a third circuit connection in the second embodiment of the temperature control circuit of this application. The first switch transistor T1 is connected to the third terminal of the first switch transistor T1 and then connected to the second terminal of the temperature resistor RT. The second terminal of the first switch transistor T1 serves as the second terminal of the temperature detection unit 20 and is connected to the ground terminal and the second terminal of the heating control unit 30.

[0033] In this embodiment, since the temperature detection unit 20 and the heating control unit 30 need to share a common ground terminal, isolation can be implemented in the connection area of ​​the two circuits to avoid mutual interference between the temperature measurement and heating processes. For example, a current or voltage isolator can be used. For instance, a first diode D1 or a first switching transistor T1 can be placed between the ground terminal and the second terminal of the temperature resistor RT. The first diode D1, based on its unidirectional conduction function, prevents voltage from flowing to the heating unit during temperature measurement, thus avoiding interference with heating. The first switching transistor T1 can be a high-level conducting transistor. When the third terminal of the first switching transistor T1 receives a high level from the power supply VCC, it will control the first switching transistor T1 to conduct, at which point the temperature measurement unit will operate normally. Furthermore, to avoid the situation where the voltage of the power supply VCC is insufficient to drive the first switching transistor T1, a boost device can be placed between the second terminal of the temperature resistor RT and the third terminal of the first switching transistor T1 to drive the first switching transistor T1. Based on the above design, the interference between temperature measurement and heating can be avoided, ensuring normal and accurate control of temperature measurement and heating.

[0034] Furthermore, based on the first and / or second embodiments of this application described above, a third embodiment of the temperature control circuit of this application is proposed. The heating control unit 30 includes a power control subunit 3B, a signal control subunit 3A, and a heating subunit 3C. The first end of the signal control subunit 3A serves as the first end of the heating control unit 30 and is connected to the second end of the control unit 10. The second end of the signal control subunit 3A is connected to the first end of the power control subunit 3B. The second end of the power control subunit 3B is connected to the first end of the heating subunit 3C. The second end of the heating subunit 3C serves as the second end of the heating control unit 30 and is connected to the second end of the temperature detection unit 20 and the grounding end.

[0035] Furthermore, refer to Figure 6 , Figure 6 This is a schematic diagram of the first circuit connection of the third embodiment of the temperature control circuit of this application. The signal control subunit 3A includes: The second resistor R2 has its first end serving as the first end of the signal control subunit 3A and connected to the second end of the control unit 10. The third resistor R3 has its first end connected to the second end of the second resistor R2, and the second end of the third resistor R3 is grounded. Transistor Q, the third terminal of transistor Q is connected to the second terminal of the second resistor R2, the second terminal of transistor Q is grounded, the first terminal of transistor Q serves as the second terminal of signal control subunit 3A, and is connected to the first terminal of power control subunit 3B.

[0036] Furthermore, the power control subunit 3B includes: The fourth resistor R4 has its first end connected to the power supply VCC, and its second end serves as the first end of the power control subunit 3B and is connected to the first end of the transistor Q. The second switch T2 has its second terminal connected to the first terminal of the fourth resistor R4, and its third terminal connected to the second terminal of the fourth resistor R4. The first terminal of the second switch T2 serves as the second terminal of the power control subunit 3B and is connected to the first terminal of the heating subunit 3C.

[0037] In this embodiment, the heating control unit 30 includes a power control subunit 3B, a signal control subunit 3A, and a heating subunit 3C. The signal control subunit 3A processes the signal input to the second terminal of the control unit 10 and outputs it to the power control subunit 3B to control the power control subunit 3B to supply power supply VCC to the heating subunit 3C. At this time, the heating subunit 3C performs heating control. Alternatively, the power supply VCC can be controlled to control the power supply subunit 3B to disconnect the power, at which time the heating subunit 3C stops heating control. In other words, the power control subunit 3B and the signal control subunit 3A can be designed according to the above functions. For example, the signal control subunit 3A consists of a second resistor R2, a third resistor R3, and a transistor Q, while the power control subunit 3B consists of a fourth resistor R4 and a second switch T2. Based on the above composition, the control is as follows: when heating needs to be turned on, the second terminal of the control unit 10 outputs a pulse signal PWM at a high level. This pulse signal acts on the third terminal of the transistor Q, i.e., the base of the transistor Q, through the second resistor R2. At this time, the transistor Q is turned on, and the third terminal of the second switch T2, i.e., the gate of the second switch T2, is pulled low. A voltage difference is formed between the source and the gate of the second switch T2, and the second switch T2 is turned on. The power control subunit 3B supplies the power supply VCC to the heating subunit 3C so that the heating subunit 3C can heat up. When the second output pulse signal PWM of the control unit 10 is at a low level, the voltage difference between the base and emitter of transistor Q is zero, transistor Q is cut off, no current flows through the fourth resistor R4, the gate and source voltages of the second switch T2 are the same, the second switch T2 is cut off, the power supply VCC control subunit 3B disconnects the power supply, and the heating subunit 3C stops heating control, so as to complete the heating control of the heating subunit 3C without affecting the normal use of the temperature measuring device 310.

[0038] Furthermore, the heating subunit 3C includes: The heating resistor RH has its first end serving as the first end of the heating sub-unit 3C and connected to the first end of the second switching transistor T2. The second end of the heating resistor RH serves as the second end of the heating sub-unit 3C and is connected to the second end of the temperature detection unit 20 and the grounding terminal.

[0039] In this embodiment, when heating is required, the power control subunit 3B supplies power VCC to the heating subunit 3C. The heating resistor RH in the heating subunit 3C is powered and generates heat, achieving the heating effect. Of course, other heating devices or methods can also be used. For example, by using power supply VCC to power the heating unit 320, the PWM is a square wave output by the control unit 10 used to control the switching of the heating device and the heating rate. Power supply VCC also powers the temperature measuring unit 310 to calculate the instantaneous temperature of the heating device based on the voltage division of the resistor. At the same time, an appropriate duty cycle can be set according to the instantaneous temperature PWM to achieve a precise temperature control effect.

[0040] In another embodiment, reference is made to Figure 7 , Figure 7 This is a schematic diagram of a second circuit connection for a third embodiment of the temperature control circuit of this application. The heating subunit 3C further includes: The anode of the second diode D2 is connected to the second terminal of the heating resistor RH, and the cathode of the second diode D2 serves as the second terminal of the heating sub-unit 3C, and is connected to the second terminal and the ground terminal of the temperature detection unit 20, or; Reference Figure 8 , Figure 8 This is a schematic diagram of the third circuit connection of the third embodiment of the temperature control circuit of this application. The first end of the third switch T3 is connected to the third end of the third switch T3 and then connected to the second end of the heating resistor RH. The second end of the third switch T3 serves as the second end of the heating sub-unit 3C and is connected to the second end of the temperature detection unit 20 and the grounding end.

[0041] In this embodiment, similarly, since the temperature detection unit 20 and the heating control unit 30 need to share a ground terminal, to avoid mutual interference between the temperature measurement process and the heating process, isolation can be implemented in the connection area of ​​the two circuits, for example, using a current or voltage isolator. For example, a second diode D2 or a third switch T3 can be placed between the ground terminal and the second terminal of the heating resistor RH. The second diode D2, based on its unidirectional conduction function, can prevent voltage from flowing to the temperature measurement unit during heating, thus avoiding interference with temperature measurement. The third switch T3 can be a high-level conducting switch. When the third terminal of the third switch T3 receives a high level from the power supply VCC, it will control the third switch T3 to conduct, at which point the heating unit will operate normally. Furthermore, to avoid the situation where the voltage of the power supply VCC is insufficient to drive the third switch T3, a boost device can be placed between the second terminal of the heating resistor RH and the third terminal of the third switch T3 to drive the third switch T3. Based on the above design, the interference between temperature measurement and heating can be avoided, ensuring normal control and accuracy of temperature measurement and heating.

[0042] It is worth noting that the switching transistor in this application can be a MOS (Metal-Oxide-Semiconductor), an IGBT (Insulated Gate Bipolar Transistor), or a transistor. The third terminal of the switching transistor is the gate of the switching transistor, and the first terminal and the second terminal of the switching transistor are the source and drain of the switching transistor, respectively. Moreover, the switching transistor can be selected as an N-type or P-type switching transistor according to the actual situation, which is not limited here.

[0043] Furthermore, based on the first, second, and / or third embodiments of this application described above, a fourth embodiment of the temperature control circuit of this application is proposed, with reference to... Figure 9 , Figure 9 This is a circuit connection diagram of the fourth embodiment of the temperature control circuit of this application. The wire connected to the ground terminal can be equivalent to a grounding resistor RG. The first end of the grounding resistor RG is connected to the second end of the temperature detection unit 20 and the second end of the heating control unit 30. The second end of the grounding resistor RG is grounded.

[0044] In this embodiment, the conductor is equivalent to a grounding resistance RG to avoid direct output grounding. Of course, other or different devices can be designed, and this is not limited here. For example, because the temperature detection unit 20 and the heating control unit 30 need to share a common ground terminal, a voltage drop will occur across the equivalent grounding resistance RG when current flows through the ground terminal. This voltage drop will affect the reference ground level of the temperature sensing unit, causing inaccurate sampling voltage of the temperature resistor RT, thus affecting the accuracy of temperature measurement. This can be addressed by controlling the PWM wave output by the heating unit, as described in the following example. Figure 10 , Figure 10 This is a schematic diagram of a control waveform for the temperature control circuit of this application. The control method eliminates the influence of cable resistance on temperature measurement by using a time-division multiplexing ground wire for heating and temperature measurement. Specifically, during the heating phase, the control board turns on the heating unit while simultaneously turning off the sampling function of the temperature measurement unit; during the temperature measurement phase, the control board turns off the heating unit while simultaneously turning on the temperature measurement unit to sample the temperature. For example, the hardware design logic can be based on connecting the high and low levels of this PWM wave to the control terminals of two switching transistors, with the two transistors being switching transistors with opposite conduction levels. The input and output terminals of the switching transistors are connected to the power supply VCC. That is, the two switching transistors control the power supply VCC output to the corresponding temperature measurement unit 310 or heating unit 320 respectively, thereby ensuring the reference ground level of the temperature measurement unit 310 and improving the detection accuracy of the temperature measurement unit 310.

[0045] For example, the power supply VCC can be a power supply with low power ripple to ensure the accuracy of temperature measurement. Of course, two power supplies can also be used. The power supply VCC for temperature measurement has low power ripple to ensure the accuracy of temperature measurement, while the power supply VCC for heating is not limited in terms of power ripple, as long as it meets the normal heating function.

[0046] Based on an embodiment of the temperature control circuit, this application also provides an intelligent massager, which includes the temperature control circuit described above.

[0047] It is worth noting that, according to the intelligent massager of this embodiment, the intelligent massager connects the second terminal of the heating control unit 30 to the second terminal of the temperature detection unit 20, and then to the ground terminal. This allows the temperature detection unit 20 and the heating control unit 30 to alternately form working circuits with the ground terminal, thus separately achieving temperature measurement and heating functions. This avoids the need for separate heating and temperature measurement units to achieve heating and temperature measurement functions. This temperature control circuit allows the temperature detection unit 20 and the heating control unit 30 to alternately form working circuits with the ground terminal, separately achieving temperature measurement and heating functions. In other words, it uses an integrated temperature control circuit to achieve both temperature measurement and heating functions, thereby improving the integration of the temperature control circuit. Furthermore, this temperature control circuit can reduce the wiring between the control board 100 and the return control board 100 by sharing a single ground connection between the heating and temperature measurement units, thus reducing the implementation cost of the temperature control circuit.

[0048] In one embodiment, the smart massager further includes: Heating device 200, on which a temperature control circuit is provided with a temperature resistor RT and a heating resistor RH.

[0049] In this embodiment, by Figure 2It is known that even the extremely simplified heating unit 320 and temperature measuring unit 310 require two wires to form a circuit. Therefore, the entire heating unit 320 and temperature measuring unit 310 require a total of four wires, which increases costs and makes maintenance more difficult. That is, the control circuit board and the heating device are connected by four wires. When a product has multiple heating and temperature measuring devices, the cable between the control board and the heating device is four times that of the heating device. Structurally, corresponding wiring positions need to be reserved, causing many inconveniences in structural design. At the same time, the increased number of wires also increases costs, reduces product reliability, and affects aesthetics. In this case, the first end of the temperature detection unit 20 is respectively placed on the control board 100 with the non-temperature detection and non-heating components in the control unit 10, and each is connected to the temperature detection component and the heating component respectively with a wire. Furthermore, by sharing a grounding terminal, assuming the grounding terminal is connected to the control board 100, only three wires are needed to simultaneously achieve heating and temperature measurement functions. This reduces the cost by one wire compared to a solution requiring at least four wires. Moreover, as demand increases, such as requiring N temperature measurement and heating units, at least N fewer wires are needed, reducing both cost and maintenance difficulty for the massager. It's worth noting that besides placing the temperature resistor RT and heating resistor RH in the temperature control circuit on the heating device 200, components from each unit can also be placed on the heating device 200, meaning the control board 100 only needs to house the power supply and control unit. Other configuration methods are also possible, but will not be detailed here.

[0050] The intelligent massager provided in this application offers a novel temperature control circuit to reduce the high implementation cost of temperature control circuits. Compared with the prior art, the beneficial effects of the device provided in this application are the same as those of the temperature control circuits provided in the above embodiments, and will not be repeated here.

[0051] It is worth noting that smart massagers may also include other hardware, such as power protection circuits and massage control circuits, which will not be described in detail here.

[0052] The above are only some embodiments of this application and do not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A temperature control circuit, characterized in that, The temperature control circuit includes: Control unit; A temperature detection unit, wherein the first end of the temperature detection unit is connected to the first end of the control unit; A heating control unit, wherein a first end of the heating control unit is connected to a second end of the control unit, and the second end of the heating control unit is connected to a second end of the temperature detection unit and then connected to a grounding terminal, wherein the temperature detection unit and the heating control unit alternately form a working circuit with the grounding terminal to separately realize the temperature measurement and heating functions.

2. The temperature control circuit as described in claim 1, characterized in that, The temperature detection unit includes: A first resistor, the first end of which is connected to the power supply, and the second end of which serves as the first end of the temperature detection unit and is connected to the first end of the control unit. A temperature resistor, the first end of which is connected to the second end of the first resistor, the second end of which serves as the second end of the temperature detection unit and is connected to the grounding terminal and the second end of the heating control unit.

3. The temperature control circuit as described in claim 2, characterized in that, The temperature detection unit further includes: A first diode, the anode of which is connected to the second terminal of the temperature resistor, and the cathode of which serves as the second terminal of the temperature detection unit and is connected to the ground terminal and the second terminal of the heating control unit, or; The first switching transistor has its first end connected to its third end and then connected to the second end of the temperature resistor. The second end of the first switching transistor serves as the second end of the temperature detection unit and is connected to the grounding terminal and the second end of the heating control unit.

4. The temperature control circuit as described in claim 1, characterized in that, The heating control unit includes a power control subunit, a signal control subunit, and a heating subunit. The first end of the signal control subunit serves as the first end of the heating control unit and is connected to the second end of the control unit. The second end of the signal control subunit is connected to the first end of the power control subunit. The second end of the power control subunit is connected to the first end of the heating subunit. The second end of the heating subunit serves as the second end of the heating control unit and is connected to the second end of the temperature detection unit and the grounding terminal.

5. The temperature control circuit as described in claim 4, characterized in that, The signal control subunit includes: The second resistor has its first end serving as the first end of the signal control subunit and connected to the second end of the control unit. A third resistor, wherein the first end of the third resistor is connected to the second end of the second resistor, and the second end of the third resistor is grounded; The transistor has its third terminal connected to the second terminal of the second resistor, and its second terminal grounded. The first terminal of the transistor serves as the second terminal of the signal control subunit and is connected to the first terminal of the power control subunit.

6. The temperature control circuit as described in claim 5, characterized in that, The power control subunit includes: The fourth resistor has its first end connected to the power supply, and its second end serves as the first end of the power control subunit and is connected to the first end of the transistor. The second switch has its second end connected to the first end of the fourth resistor, its third end connected to the second end of the fourth resistor, and its first end serving as the second end of the power control subunit and connected to the first end of the heating subunit.

7. The temperature control circuit as described in claim 6, characterized in that, The heating subunit includes: A heating resistor, wherein the first end of the heating resistor serves as the first end of the heating subunit and is connected to the first end of the second switching transistor, and the second end of the heating resistor serves as the second end of the heating subunit and is connected to the second end of the temperature detection unit and the grounding terminal.

8. The temperature control circuit as described in claim 7, characterized in that, The heating subunit also includes: The second diode has its anode connected to the second terminal of the heating resistor, and its cathode serving as the second terminal of the heating subunit, and connected to the second terminal of the temperature detection unit and the ground terminal, or; The third switch is connected to the second terminal of the heating resistor after its first terminal is connected to the third terminal of the heating unit. The second terminal of the third switch serves as the second terminal of the heating subunit and is connected to the second terminal of the temperature detection unit and the ground terminal.

9. A smart massager, characterized in that, The intelligent massager includes the temperature control circuit as described in any one of claims 1 to 8.

10. The intelligent massager as described in claim 9, characterized in that, The intelligent massager also includes: A heating device, wherein a temperature resistor and a heating resistor are provided in the temperature control circuit.

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