High-power temperature control switch

Abstract

The utility model discloses a high-power temperature control switch. The high-power temperature control switch comprises an MCU (Microprogrammed Control Unit) minimum system, the step-down circuit is electrically connected with the power supply end of the MCU minimum system, and the step-down circuit is used for converting an input alternating current power supply into a direct current power supply used by the MCU minimum system; the digital display screen is electrically connected with the MCU minimum system, and the digital display screen is used for displaying the temperature information; and the driving module is electrically connected with the MCU minimum system. The MCU minimum system detects the environment temperature in real time according to temperature collection and then sends out a corresponding instruction to the driving module, the driving module drives coils of the relays SK1, SK2 and SK3 to be powered on and make closing or opening actions, and therefore the phase lines A, B and C are made to be connected or disconnected, and as the relays of the product are 63A large-current magnetic latching relays, the reliability of the product is improved, and the reliability of the product is improved. And the product can bear large current output, so that the product has the effect of controlling high-power equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature control switches, in particular to a high-power temperature control switch. Background Art

[0002] The primary function of a temperature control switch is to control temperature, ensuring that equipment or systems operate within a set temperature range. By sensing changes in ambient temperature and using physical deformation or other mechanisms to initiate a conduction or disconnection, a temperature control switch controls the on / off state of a circuit to achieve temperature regulation.

[0003] The current that the temperature control switch circuit currently available on the market can carry is usually 16A, which cannot meet the needs of some large temperature control equipment and systems. Therefore, the applicant has made a useful design and found a solution to the above problem. The technical solution to be introduced below was produced in this context. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology designs and to provide a high-power product.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions.

[0006] A high-power temperature-controlled switch includes an MCU minimum system, an E1 power supply battery; a step-down circuit, electrically connected to the power supply terminal of the MCU minimum system, and used to convert input AC power into DC power for use by the MCU minimum system; a digital display screen, electrically connected to the MCU minimum system, and used to display temperature information; a drive module, electrically connected to the MCU minimum system, and used to receive control signals from the MCU minimum system; a relay, electrically connected to the drive module, and used to control the on and off of a device, and configured to be a high-power-bearing relay; a temperature acquisition device, electrically connected to the signal terminal of the MCU minimum system, and used to transmit the acquired ambient temperature information to the MCU minimum system; and a key operation device, electrically connected to the MCU minimum system, and used to set a range value for controlling the temperature.

[0007] Preferably, the step-down circuit includes a power chip SM7015, a three-terminal integrated stabilizer 78L05, a D1 rectifier diode, an E3 power battery, an E4 power battery, a C1 capacitor, and a C2 capacitor. Port 1 of the power chip SM7015 is provided with a D4 fast recovery diode, and port 8 of the power chip SM7015 is provided with an L2 inductor. The D4 fast recovery diode is connected in series with the L2 inductor. The E1 power battery is connected in parallel to ports 1 and 8 of the power chip SM7015. Port 2 of the power chip SM7015 is electrically connected to port 1, and ports 5, 6, and 7 of the power chip SM7015 are electrically connected to port 8. Port 5 of the power chip SM7015 is provided with a D5 fast recovery diode. The diode D5 fast recovery diode is connected to the N zero line, the No. 4 port of the power chip SM7015 is provided with an L1 inductor, and the inductor is provided with power terminals L1, L2, and L3. Resistors and rectifier diodes are connected in series between the power terminals L1, L2, and L3 and the L1 inductor in sequence. An E2 power battery is connected in parallel between the L1 inductor and the N zero line, the input terminal of the three-terminal integrated stabilizer 78L05 is connected in series with the L2 inductor, and the ground wire of the three-terminal integrated stabilizer 78L05 is electrically connected to the N zero line. The E4 power battery and the C1 capacitor are connected in parallel to the output terminal of the three-terminal integrated stabilizer 78L05 and the N zero line, and the E3 power battery and the C2 capacitor are connected in parallel to the input terminal of the three-terminal integrated stabilizer 78L05 and the N zero line.

[0008] Preferably, the signal ends of SEG1, SEG2, SEG3 and SEG4 of the digital display screen are electrically connected to 13, 14, 15 and 16 of the MCU minimum system respectively.

[0009] Preferably, the drive module includes a U4 relay drive chip, a U5 relay drive chip, and a U6 relay drive chip, and the No. 6 ports of the U4 relay drive chip, the U5 relay drive chip, and the U6 relay drive chip are respectively provided with an R11 resistor, an R14 resistor, and an R16 resistor, and the No. 6 ports of the U4 relay drive chip, the U5 relay drive chip, and the U6 relay drive chip are respectively provided with an R12 resistor, an R13 resistor, and an R15 resistor, and the No. 5 ports of the U4 relay drive chip, the U5 relay drive chip, and the U6 relay drive chip are electrically connected to the 12V output end of the step-down circuit.

[0010] Preferably, the relay includes a SK1 relay, a SK2 relay, and a SK3 relay, the OB1 port of the SK1 relay is electrically connected to port 1 of the U4 relay driver chip, the OB2 port of the SK2 relay is electrically connected to port 1 of the U5 relay driver chip, the OB3 port of the SK3 relay is electrically connected to port 1 of the U6 relay driver chip, the OB1 port of the SK1 relay is electrically connected to port 4 of the U4 relay driver chip, the OB2 port of the SK2 relay is electrically connected to port 4 of the U5 relay driver chip, and the OB3 port of the SK3 relay is electrically connected to port 4 of the U6 relay driver chip.

[0011] Preferably, the button operation includes a SW1 button, a SW2 button, a SW3 button, a SW4 button, and an R20 resistor. Ports 13, 14, 15, and 16 of the MCU minimum system are electrically connected to one end of the SW4 button, the SW3 button, the SW2 button, and the SW1 button, respectively. The SW1 button, the SW2 button, the SW3 button, and the SW4 button are connected in series to the R20 resistor, and the R20 resistor is connected in series to ground.

[0012] Preferably, the temperature acquisition includes an R9 resistor, an R10 resistor, and a JP4 temperature sensor, the R9 resistor and the R10 resistor are electrically connected to port 1 of the JP4 temperature sensor, the other end of the R9 resistor is electrically connected to port 9 of the control chip, the other end of the R10 resistor is electrically connected to port 1 of the control chip, and port 2 of the JP4 temperature sensor is grounded.

[0013] Preferably, the relay capable of withstanding high power is configured as a 63A magnetic latching relay.

[0014] Beneficial effects:

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model uses the MCU minimum system to detect the ambient temperature in real time based on temperature acquisition, and then sends corresponding instructions to the drive module. The drive module drives the coils of the SK1, SK2, and SK3 relays to energize and perform closing or opening actions to connect or disconnect the A, B, and C phase lines. In addition, since the relay of this product adopts a 63A high-current magnetic latching relay, the product can withstand high-current output, thereby enabling the product to control high-power equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a module logic diagram of a high-power temperature-controlled switch of the utility model;

[0018] Figure 2This is a schematic diagram of the minimum MCU system of a high-power temperature-controlled switch of the utility model;

[0019] Figure 3 This is a schematic diagram of a step-down circuit of a high-power temperature-controlled switch of the utility model;

[0020] Figure 4 This is a schematic diagram of a digital display circuit of a high-power temperature-controlled switch of the utility model;

[0021] Figure 5 This is a schematic diagram of a driving circuit for a high-power temperature-controlled switch of the utility model;

[0022] Figure 6 This is a schematic diagram of a relay circuit of a high-power temperature-controlled switch of the utility model;

[0023] Figure 7 This is a schematic diagram of a temperature acquisition circuit for a high-power temperature-controlled switch of the present invention;

[0024] Figure 8 This is a schematic diagram of a key operation circuit of a high-power temperature control switch of the utility model; DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0027] In the embodiments of the present invention, "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0028] Reference example Figures 1 to 8, a high-power temperature control switch, including an MCU minimum system, an E1 power battery; a step-down circuit, the step-down circuit is electrically connected to the power supply end of the MCU minimum system, and the step-down circuit is used to convert the input AC power into a DC power supply for use by the MCU minimum system; a digital display screen, the digital display screen is electrically connected to the MCU minimum system, and the digital display screen is used to display temperature information; a drive module, the drive module is electrically connected to the MCU minimum system, and the drive module receives a control signal from the MCU minimum system; a relay, the relay is electrically connected to the drive module, the relay is used to control the on and off of the device, and the relay is set to be a relay that can withstand high power; temperature acquisition, the temperature acquisition is electrically connected to the signal end of the MCU minimum system, and the temperature acquisition is used to transmit the collected ambient temperature information to the MCU minimum system; key operation, the key operation is electrically connected to the MCU minimum system, and the key operation is used to set the range value of the control temperature;

[0029] It is worth mentioning that the step-down circuit includes the power chip SM7015, the three-terminal integrated stabilizer 78L05, the D1 rectifier diode, the E3 power battery, the E4 power battery, the C1 capacitor, and the C2 capacitor. Port 1 of the power chip SM7015 is provided with a D4 fast recovery diode, and port 8 of the power chip SM7015 is provided with an L2 inductor. The D4 fast recovery diode is connected in series with the L2 inductor. The E1 power battery is connected in parallel to ports 1 and 8 of the power chip SM7015. Port 2 of the power chip SM7015 is electrically connected to port 1. Ports 5, 6, and 7 of the power chip SM7015 are electrically connected to port 8. Port 5 of the power chip SM7015 is provided with a D5 fast recovery diode. The recovery diode and the D5 fast recovery diode are connected to the N neutral line. Port 4 of the power chip SM7015 is provided with an L1 inductor. The inductor is provided with power terminals L1, L2, and L3. Resistors and rectifier diodes are connected in series between the power terminals L1, L2, and L3 and the L1 inductor in sequence. An E2 power battery is connected in parallel between the L1 inductor and the N neutral line. The input terminal of the three-terminal integrated stabilizer 78L05 is connected in series with the L2 inductor. The ground wire of the three-terminal integrated stabilizer 78L05 is electrically connected to the N neutral line. The E4 power battery and the C1 capacitor are connected in parallel to the output terminal of the three-terminal integrated stabilizer 78L05 and the N neutral line. The E3 power battery and the C2 capacitor are connected in parallel to the input terminal of the three-terminal integrated stabilizer 78L05 and the N neutral line.

[0030] At the power supply terminals L1, L2, and L3, resistors R19, R18, and R17 are connected in series, respectively. These resistors are then connected in series with rectifier diodes D1, D2, and D3, respectively. The R19, R18, and R17 resistors rectify the current-limited AC power into a unidirectional DC power supply. This DC power supply not only provides rated power for the SM7015 power supply chip, but also replenishes energy for the E1, E2, and E3 power batteries. The L1 and L2 inductors limit sudden current changes, filtering out noise and unwanted signals in the circuit. The D4 and D5 fast recovery diodes effectively reduce electromagnetic interference in the circuit and improve overall circuit stability and efficiency. Compared to traditional diodes, fast recovery diodes have lower losses and higher efficiency during switching. They also have unidirectional conductivity and low reverse leakage current. The three-terminal integrated stabilizer 78L05 The input and output terminals of the MCU are connected to capacitors C2 and C1, respectively. This is because the power supply may carry ripple and high-frequency signals, which can affect the circuit. Capacitors perform filtering and decoupling functions in the circuit. Filtering reduces ripple and high-frequency signals in the input voltage, maintaining a stable output voltage. Decoupling removes ripple and spikes in the input voltage, protecting the circuit. Therefore, capacitors C2 and C1 ensure the stable operation and service life of the three-terminal integrated stabilizer 78L05, further improving the current and voltage stability of the circuit. When power supply terminals L1, L2, and L3 stop supplying power, to ensure that the MCU minimum system retains the temperature parameters set before power failure, the E1, E2, E3, and E4 power batteries provide power to the power chip SM7015 and the MCU minimum system. The MCU minimum system is configured as the N76E003 controller chip, which has a built-in power-off memory module.

[0031] It is worth mentioning that the signal terminals of SEG1, SEG2, SEG3 and SEG4 of the digital display are electrically connected to 13, 14, 15 and 16 of the MCU minimum system respectively, and the ports 1, 2, 3, 4, 5, 7, 10 and 11 of the digital display are connected to the ports 18, 17, 8, 12, 20, 11, 19 and 10 of the MCU minimum system respectively, and the ports 1, 2, 3, 4, 5, 7, 10 and 11 of the digital display are connected to the LEDA, LEDB, LEDC, LEDD, LEDE, LEDF, LEDG and LEDH lights inside it. According to the signals sent by the MCU minimum system, the digital display screen displays different temperature data.

[0032] It is worth mentioning that the drive module includes U4 relay driver chip, U5 relay driver chip, and U6 relay driver chip. The No. 6 port of U4 relay driver chip, U5 relay driver chip, and U6 relay driver chip are respectively provided with R11 resistor, R14 resistor, and R16 resistor. The No. 6 port of U4 relay driver chip, U5 relay driver chip, and U6 relay driver chip are respectively provided with R12 resistor, R13 resistor, and R15 resistor. The No. 5 port of U4 relay driver chip, U5 relay driver chip, and U6 relay driver chip is electrically connected to the 12V output end of the step-down circuit. The U4, U5, and U6 relay driver chips are MD7620A bidirectional magnetic latching relay driver chips. The main features are: The key point is the low voltage difference and ultra-low power consumption characteristics. Port 3 of the U4, U5, and U6 relay driver chips receives the control signal from the MCU minimum system, and the received control signal is amplified by the amplifier circuit inside the U4, U5, and U6 relay driver chips to drive the coils of the SK1 relay, SK2 relay, and SK3 relay to generate sufficient magnetic force to realize the on and off of the contacts of the SK1 relay, SK2 relay, and SK3 relay. When the SK1 relay, SK2 relay, and SK3 relay are closed or disconnected, the U4, U5, and U6 relay driver chips can provide feedback signals to the MCU minimum system to indicate the working status of the relay at this time, which helps the MCU minimum system to monitor the working status of the relay in real time.

[0033] It is worth mentioning that the relays include SK1 relay, SK2 relay, and SK3 relay. The OB1 port of SK1 relay is electrically connected to the No. 1 port of U4 relay driver chip, the OB2 port of SK2 relay is electrically connected to the No. 1 port of U5 relay driver chip, the OB3 port of SK3 relay is electrically connected to the No. 1 port of U6 relay driver chip, the OB1 port of SK1 relay is electrically connected to the No. 4 port of U4 relay driver chip, the OB2 port of SK2 relay is electrically connected to the No. 4 port of U5 relay driver chip, the OB3 port of SK3 relay is electrically connected to the No. 4 port of U6 relay driver chip. When the amplifying circuit inside the U4, U5, and U6 relay driver chips receives the control signal Amplify, output positive 12V DC power to the coils of SK1 relay, SK2 relay and SK3 relay through port 5 of U4, U5 and U6 relay driver chips, so that the contacts of SK1 relay, SK2 relay and SK3 relay are closed, and the A, B and C phase lines connected to SK1 relay, SK2 relay and SK3 relay and large equipment are connected; when port 5 of U4, U5 and U6 relay driver chips output negative 12V DC power to the coils of SK1 relay, SK2 relay and SK3 relay, the contacts of SK1 relay, SK2 relay and SK3 relay are disconnected, and the circuit power of A, B and C phase lines connected to SK1 relay, SK2 relay and SK3 relay and large equipment is cut off;

[0034] It is worth mentioning that the button operations include SW1 button, SW2 button, SW3 button, SW4 button, and R20 resistor. The 13, 14, 15, and 16 ports of the MCU minimum system are electrically connected to one end of the SW4 button, SW3 button, SW2 button, and SW1 button respectively. The SW1 button, SW2 button, SW3 button, and SW4 button are connected in series with the R20 resistor, and the R20 resistor is connected in series to ground. The SW1 button, SW2 button, SW3 button, and SW4 button correspond to the settings, start / stop, increase, and decrease functions respectively. When the SW2 button is pressed, the MCU minimum system, buck module, digital tube display, and temperature acquisition are started. When the SW1 button is pressed, the LED light on the digital display starts flashing. At this time, the upper temperature limit is set by the SW3 and SW4 buttons, and then the lower temperature limit is set by pressing the SW1 button. Then long press the SW1 button to confirm that the setting is successful.

[0035] It is worth mentioning that the temperature acquisition includes the R9 resistor, the R10 resistor, and the JP4 temperature sensor. The R9 resistor and the R10 resistor are electrically connected to port 1 of the JP4 temperature sensor. The other end of the R9 resistor is electrically connected to port 9 of the control chip. The other end of the R10 resistor is electrically connected to port 1 of the control chip. Port 2 of the JP4 temperature sensor is grounded. The ADC (Analog-to-Digital Converter) is an electronic component that converts analog signals into digital signals. The ADC output by the JP4 temperature sensor converts continuously changing analog signals (such as voltage, current, etc.) into discrete digital signals for processing and analysis by the MCU minimum system. The VCC high-voltage DC power supply is converted to a low-voltage DC power supply suitable for the JP4 temperature sensor through the R9 resistor.

[0036] It is worth mentioning that the relay that can withstand high power is set to a 63A magnetic latching relay. The MCU minimum system detects the ambient temperature in real time based on temperature acquisition, and then issues corresponding instructions to the drive module. The drive module drives the coils of the SK1, SK2, and SK3 relays to energize and perform closing or opening actions to connect or disconnect the A, B, and C phase lines. In addition, since the relay of this product uses a 63A high-current magnetic latching relay, the product can withstand high-current output, so that the product has the function of controlling high-power equipment.

[0037] The above design solution can enable the product to achieve the advantage of high power.

[0038] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as falling within the scope of protection determined by the claims submitted for the present invention.

Claims

1. A high-power temperature-controlled switch, characterized by: include MCU minimum system, E1 power battery; A step-down circuit, electrically connected to a power supply terminal of the MCU minimum system, and configured to convert an input AC power supply into a DC power supply for use by the MCU minimum system; A digital display screen is electrically connected to the MCU minimum system and is used to display temperature information; A driving module, the driving module being electrically connected to the MCU minimum system and receiving a control signal from the MCU minimum system; A relay, electrically connected to the drive module, used to control the on / off of the device, and configured to be capable of withstanding high power; Temperature acquisition, the temperature acquisition is electrically connected to the signal terminal of the MCU minimum system, and the temperature acquisition is used to transmit the collected ambient temperature information to the MCU minimum system; Key operation, the key operation is electrically connected to the MCU minimum system, and the key operation is used to set the range value of the control temperature.

2. The high-power temperature-controlled switch according to claim 1, characterized in that: The step-down circuit includes a power chip SM7015, a three-terminal integrated stabilizer 78L05, a D1 rectifier diode, an E3 power battery, an E4 power battery, a C1 capacitor, and a C2 capacitor. Port 1 of the power chip SM7015 is provided with a D4 fast recovery diode, and port 8 of the power chip SM7015 is provided with an L2 inductor. The D4 fast recovery diode and the L2 inductor are connected in series. The E1 power battery is connected in parallel to ports 1 and 8 of the power chip SM7015. Port 2 of the power chip SM7015 is electrically connected to port 1. Ports 5, 6, and 7 of the power chip SM7015 are electrically connected to port 8. Port 5 of the power chip SM7015 is provided with a D5 fast recovery diode. tube, the D5 fast recovery diode is connected to the N zero line, port 4 of the power chip SM7015 is provided with an L1 inductor, and the inductor is provided with power terminals L1, L2, and L3. Resistors and rectifier diodes are connected in series between the power terminals L1, L2, and L3 and the L1 inductor in sequence, and an E2 power battery is connected in parallel between the L1 inductor and the N zero line. The input terminal of the three-terminal integrated stabilizer 78L05 is connected in series with the L2 inductor, and the ground wire of the three-terminal integrated stabilizer 78L05 is electrically connected to the N zero line. The E4 power battery and the C1 capacitor are connected in parallel to the output terminal of the three-terminal integrated stabilizer 78L05 and the N zero line, and the E3 power battery and the C2 capacitor are connected in parallel to the input terminal of the three-terminal integrated stabilizer 78L05 and the N zero line.

3. The high-power temperature-controlled switch according to claim 1, characterized in that: The signal ends of SEG1, SEG2, SEG3 and SEG4 of the digital display screen are electrically connected to 13, 14, 15 and 16 of the MCU minimum system respectively.

4. The high-power temperature-controlled switch according to claim 1, characterized in that: The drive module includes a U4 relay drive chip, a U5 relay drive chip, and a U6 relay drive chip. Port No. 6 of the U4 relay drive chip, the U5 relay drive chip, and the U6 relay drive chip is respectively provided with an R11 resistor, an R14 resistor, and an R16 resistor. Port No. 6 of the U4 relay drive chip, the U5 relay drive chip, and the U6 relay drive chip is respectively provided with an R12 resistor, an R13 resistor, and an R15 resistor. Port No. 5 of the U4 relay drive chip, the U5 relay drive chip, and the U6 relay drive chip is electrically connected to the 12V output end of the step-down circuit.

5. The high-power temperature-controlled switch according to claim 4, characterized in that: The relays include SK1 relay, SK2 relay, and SK3 relay. The OB1 port of the SK1 relay is electrically connected to port 1 of the U4 relay driver chip, the OB2 port of the SK2 relay is electrically connected to port 1 of the U5 relay driver chip, the OB3 port of the SK3 relay is electrically connected to port 1 of the U6 relay driver chip, the OB1 port of the SK1 relay is electrically connected to port 4 of the U4 relay driver chip, the OB2 port of the SK2 relay is electrically connected to port 4 of the U5 relay driver chip, and the OB3 port of the SK3 relay is electrically connected to port 4 of the U6 relay driver chip.

6. The high-power temperature-controlled switch according to claim 1, characterized in that: The key operation includes the SW1 button, the SW2 button, the SW3 button, the SW4 button, and the R20 resistor. The 13, 14, 15, and 16 ports of the MCU minimum system are electrically connected to one end of the SW4 button, the SW3 button, the SW2 button, and the SW1 button, respectively. The SW1 button, the SW2 button, the SW3 button, and the SW4 button are connected in series to the R20 resistor, and the R20 resistor is connected in series to the ground.

7. The high-power temperature-controlled switch according to claim 1, characterized in that: The temperature acquisition includes an R9 resistor, an R10 resistor, and a JP4 temperature sensor. The R9 resistor and the R10 resistor are electrically connected to port 1 of the JP4 temperature sensor. The other end of the R9 resistor is electrically connected to port 9 of the control chip. The other end of the R10 resistor is electrically connected to port 1 of the control chip. Port 2 of the JP4 temperature sensor is grounded.

8. The high-power temperature-controlled switch according to any one of claims 1 to 7, characterized in that: The relay capable of withstanding high power is set to be a 63A magnetic latching relay.

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