Microcomputer protection measurement and control heat dissipation circuit device

Abstract

The utility model discloses a microcomputer protection measurement and control heat dissipation circuit device, comprising a main circuit breaker QF which is connected with three-phase power supplies L1, L2 and L3; the main loop comprises a motor M1 and a motor M2 which are connected with the main circuit breaker QF, the motor M1 is connected with a contactor KM1 and a contactor KM3, and the motor M2 is connected with a contactor KM2 and a contactor KM4; the secondary loop comprises a switch SB1, a loop 1, a loop 2, a loop 3 and a loop 4, the loop 1 and the loop 2 are used for controlling the motor to rotate forwards for heat dissipation, and the loop 3 and the loop 4 are used for controlling the motor to rotate backwards for exhausting and heating. The microcomputer protection measurement and control heat dissipation circuit device has the following beneficial effects: the microcomputer protection measurement and control heat dissipation circuit device can increase the temperature in the microcomputer protection measurement and control device when the temperature is relatively low, prevent water vapor from condensing, and discharge the water vapor.

Description

Technical Field

[0001] The utility model relates to a heat dissipation system, in particular to a microcomputer protection, measurement and control heat dissipation circuit device. Background Art

[0002] As a key device in the power system, the operating reliability of the microcomputer protection and control device directly affects the safe and stable operation of the entire system. Existing microcomputer protection and control devices generally use forced air cooling or natural heat dissipation to dissipate heat to ensure the normal operating temperature of the internal components of the equipment. These heat dissipation methods play an important role in practical applications.

[0003] The existing heat dissipation system of microcomputer protection and control devices usually adopts the following methods: opening ventilation holes on the device shell, installing a cooling fan inside, and taking away the heat generated during the operation of the equipment by forced convection; or using heat conducting elements such as heat sinks and heat dissipation fins to dissipate heat by heat conduction and natural convection. These heat dissipation methods can meet the basic heat dissipation needs of the equipment to a certain extent.

[0004] However, the existing heat dissipation system has obvious technical defects. The existing heat dissipation system ignores the problem of water vapor condensation caused by changes in ambient temperature. When the ambient temperature is low, there is a large temperature difference between the inside and outside of the equipment. In addition, the ventilation and heat dissipation system continuously introduces humid air into the equipment, which easily forms condensation on the surface of the circuit board and components. This phenomenon is particularly obvious in areas where the seasons change or the temperature difference between day and night is large.

[0005] The problem of water vapor condensation is extremely harmful. First, condensed water will cause a conductive path to form on the surface of the printed circuit board, causing a short circuit or leakage. Second, long-term water vapor erosion will accelerate the aging and corrosion of electronic components, reducing the service life of the equipment. More seriously, when the temperature rises, the humid environment inside the equipment will accelerate the oxidation of metal parts and affect the reliability of electrical connections. The traditional heat dissipation system is mainly designed to quickly discharge heat and adopts an open ventilation structure. Although this structure is conducive to heat dissipation, it also provides a channel for the intrusion of water vapor. Utility Model Content

[0006] The purpose of the utility model is to provide a microcomputer protection, measurement and control heat dissipation circuit device, which can increase the temperature inside the microcomputer protection, measurement and control device when the temperature is low, prevent water vapor from condensing, and discharge the water vapor.

[0007] The above technical objectives of the utility model are achieved through the following technical solutions:

[0008] A microcomputer protection, measurement and control heat dissipation circuit device comprises: a main circuit breaker QF, the main circuit breaker QF is connected to a three-phase power supply L1, L2, L3; a main circuit comprises a motor M1 and a motor M2 connected to the main circuit breaker QF, the motor M1 is connected to a contactor KM1 and a contactor KM3, and the motor M2 is connected to a contactor KM2 and a contactor KM4; a secondary circuit comprises a switch SB1, a circuit 1, a circuit 2, a circuit 3 and a circuit 4, the circuit 1 and the circuit 2 are used to control the forward rotation heat dissipation of the motor, and the circuit 3 and the circuit 4 are used to control the reverse rotation exhaust and heating of the motor.

[0009] The utility model is further configured as follows: loop 1 includes: an auxiliary relay FR1, a temperature switch TS1 connected in series with the auxiliary relay FR1, the temperature switch TS1 is closed when the temperature is greater than 30°C; the auxiliary relay FR1 is connected to an auxiliary contactor KM1, which is used to control the contactor KM1 to close and make the motor M1 rotate forward.

[0010] The utility model is further configured as follows: loop 2 includes: an auxiliary relay FR2, a temperature switch TS2 connected in series with the auxiliary relay FR2, the temperature switch TS2 is closed when the temperature is greater than 45°C; the auxiliary relay FR2 is connected to an auxiliary contactor KM2, which is used to control the contactor KM2 to close and make the motor M2 rotate forward.

[0011] The utility model is further configured as follows: loop 3 includes: an auxiliary relay FR1 which is identical to and connected in parallel with the auxiliary relay FR1 in loop 1, and the auxiliary relay FR2 is connected in series with a temperature switch TS3; the temperature switch TS3 is connected with a resistor R1 and an auxiliary contactor KM3, and the temperature switch TS3 is closed when the temperature is lower than 15°C.

[0012] The utility model is further configured as follows: loop 4 includes: an auxiliary relay FR2 which is identical to and connected in parallel with the auxiliary relay FR2 in loop 2, the auxiliary relay FR2 being connected in series with a temperature switch TS4; the temperature switch TS4 being connected with a resistor R2 and an auxiliary contactor KM4, the temperature switch TS4 being closed when the temperature is below 0°C.

[0013] The utility model is further configured as follows: the motor M1 and the motor M2 are connected to a thermal relay FR1 and a thermal relay FR2 respectively.

[0014] The utility model is further configured as follows: the motor M1 and the motor M2 are both arranged at the bottom of the microcomputer protection and measurement and control device.

[0015] The utility model is further configured as follows: the voltage of the three-phase power supply L1, L2, L3 is 380V

[0016] The utility model is further configured as follows: when the contactor KM1 is closed and the contactor KM3 is disconnected, the motor M1 rotates forward; when the contactor KM1 is disconnected and the contactor KM3 is closed, the motor M1 rotates reversely.

[0017] The utility model is further configured as follows: when the contactor KM2 is closed and the contactor KM4 is disconnected, the motor M2 rotates forward; when the contactor KM2 is disconnected and the contactor KM4 is closed, the motor M2 rotates reversely.

[0018] In summary, the utility model has the following beneficial effects:

[0019] This application solves the problem of water vapor condensation caused by temperature difference in traditional heat dissipation systems. Temperature graded control and two-way airflow adjustment are achieved through a dual-motor system: when the temperature rises (30-44°C), the first motor rotates forward for basic heat dissipation; when the temperature continues to rise (≥45°C), the second motor cooperates to accelerate heat dissipation. In low temperature environments (≤15°C), the system not only increases the internal temperature through resistance heating, but also allows the motor to reverse and actively discharge humid air outside the device, effectively preventing water vapor from condensing on the surface of circuit boards and components, overcoming the problem that traditional open ventilation structures are prone to water vapor intrusion, improving the reliability of microcomputer protection and measurement and control devices in different temperature environments, extending the service life of electronic components, and avoiding problems such as short circuits, leakage and metal oxidation caused by water vapor condensation. It is especially suitable for application environments with seasonal changes or large temperature differences between day and night. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the circuit structure of the embodiment; DETAILED DESCRIPTION

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0023] In the description of the present utility model, "multiple" means two or more than two, unless otherwise clearly specified and specifically defined. In the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0025] like Figure 1 As shown, a microcomputer protection, measurement and control heat dissipation circuit device includes a main circuit breaker QF. QF is a three-phase circuit breaker connected to a three-phase power supply L1, L2, and L3. The voltage of the three-phase power supply is 380V. The main circuit breaker QF is connected to a main circuit and a secondary circuit.

[0026] 1. Main circuit

[0027] The main circuit includes a motor M1 connected to the main circuit breaker QF, and a contactor KM1 is connected between the motor M1 and the main circuit breaker QF. A contactor KM3 is arranged in parallel on one side of the contactor KM1. When the contactor KM1 is connected and the contactor KM3 is disconnected, the motor M1 rotates forward, otherwise the motor M1 rotates reversely.

[0028] Motor M2 is connected in parallel with motor M1 and connected to main circuit breaker QF. Motor M2 is connected to contactor KM2. Contactor KM2 is connected in parallel with contactor KM4. When contactor KM2 is connected and contactor KM4 is disconnected, motor M2 rotates forward, otherwise motor M2 rotates reversely.

[0029] As mentioned above, the motor M1 and the motor M2 are respectively connected to the thermal relays FR1 and FR2 to protect the motors M1 and M2 from overload.

[0030] As described above, when the motors M1 and M2 rotate forward, air is blown into the microcomputer protection and control device to achieve the heat dissipation effect on the internal components of the microcomputer protection and control device. When the motors M1 and M2 rotate reversely, the air flows out of the microcomputer protection and control device, thereby sucking water vapor out of the microcomputer protection and control device at a low temperature.

[0031] As mentioned above, the motor M1 and the motor M2 are both arranged at the bottom of the microcomputer protection and measurement and control device.

[0032] 2. Secondary circuit

[0033] The secondary loop is a control loop, which mainly includes a switch SB1, loop 1, loop 2, loop 3 and loop 4. The switch SB1 is used to control the closing and opening of the entire secondary loop.

[0034] Circuit 1 includes auxiliary relay FR1 and temperature switch TS1 connected in series with auxiliary relay FR1. When the temperature is greater than 30°C, temperature switch TS1 is closed, and when the temperature is lower than 30°C, temperature switch TS1 is disconnected. Auxiliary relay FR1 is connected to auxiliary contactor KM1. When circuit 1 is closed, auxiliary contactor KM1 works, so that contactor KM1 in the main circuit is closed, motor M1 rotates forward, and heat is dissipated inside the microcomputer protection and measurement and control device.

[0035] Circuit 2 includes auxiliary relay FR2 and temperature switch TS2 connected in series with auxiliary relay FR2. When the temperature is greater than 45°C, temperature switch TS2 is closed, and when it is lower than 45°C, temperature switch TS2 is disconnected. Auxiliary relay FR2 is connected to auxiliary contactor KM2. When circuit 2 is closed, auxiliary contactor KM2 works, so that contactor KM2 in the main circuit is closed, and motor M2 rotates forward. When the temperature continues to rise to more than 45°C, the heat dissipation inside the microcomputer protection and control device is accelerated through two motors.

[0036] Through the above-mentioned loop 1 and loop 2, the forward rotation order of motor M1 and motor M2 can be controlled, so that when the temperature rises to 30-44°C, heat is dissipated through motor M1. When the temperature continues to rise, heat is dissipated faster through motor M2, thereby improving the overall heat dissipation gradient and heat dissipation effect.

[0037] Loop 3 includes an auxiliary relay FR1, which is the same as the auxiliary relay FR1 in loop 1, and the two are arranged in parallel. The auxiliary relay FR1 is connected in series with a temperature switch TS3, which is turned on when the temperature is lower than 15°C and turned off when the temperature is higher than 15°C. The temperature switch TS3 is connected to a resistor R1, which generates heat when the resistor R1 is closed to heat the inside of the microcomputer protection and measurement and control device. The resistor R1 is connected to an auxiliary contactor KM3. When the temperature is lower than 15°C, the temperature switch TS3 is closed, so that loop 3 is connected. The resistor R1 works to increase the temperature inside the microcomputer protection and measurement and control device to prevent water vapor condensation. At the same time, the auxiliary contactor KM3 works, so that the contactor KM3 in the main circuit is closed, and the motor M1 is reversed. While preventing water vapor condensation, the water vapor inside the microcomputer protection and measurement and control device is also taken out to prevent the water vapor from condensing on the components, causing corrosion or short circuit of the components.

[0038] Loop 4 includes an auxiliary relay FR2, which is the same as the auxiliary relay FR2 in loop 1, and the two are arranged in parallel. The auxiliary relay FR2 is connected in series with a temperature switch TS4, which is turned on when the temperature is lower than 0°C and turned off when the temperature is higher than 0°C. The temperature switch TS4 is connected to a resistor R2, which generates heat when the resistor R2 is closed to heat the inside of the microcomputer protection and measurement and control device. The resistor R2 is connected to an auxiliary contactor KM4. When the temperature is lower than 0°C, the temperature switch TS4 is closed, so that loop 4 is connected. The resistor R2 works to increase the temperature inside the microcomputer protection and measurement and control device to prevent water vapor condensation. At the same time, the auxiliary contactor KM4 works, so that the contactor KM4 in the main circuit is closed, and the motor M2 reverses. In conjunction with the above-mentioned motor M1, the two motors work at the same time, and the two resistors are heated at the same time, further improving the function of preventing water vapor condensation.

[0039] Through the above-mentioned loop 3 and loop 4, the reversing order of motor M1 and motor M2 can be controlled, so that when the temperature drops to 0-15°C, heating is performed through resistor R1, and water vapor is discharged through motor M1. When the temperature continues to drop, heating is performed together with resistor R2 and resistor R1, and water vapor is discharged together through motor M1 and motor M2, thereby improving the overall anti-condensation effect.

[0040] As mentioned above, necessary interlocking protection measures can be added when the motors M1 and M2 are switched forward and reverse. This is a prior art and will not be described in detail.

[0041] As mentioned above, four temperature switches are arranged in the middle of the microcomputer protection and measurement and control device to measure the central temperature of the microcomputer protection and measurement and control device.

[0042] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A microcomputer protection, measurement and control heat dissipation circuit device, characterized in that: include: A main circuit breaker QF, wherein the main circuit breaker QF is connected to a three-phase power supply L1, L2, L3; A main circuit includes a motor M1 and a motor M2 connected to the main circuit breaker QF, the motor M1 is connected to the contactor KM1 and the contactor KM3, and the motor M2 is connected to the contactor KM2 and the contactor KM4; The secondary circuit includes a switch SB1, a circuit 1, a circuit 2, a circuit 3 and a circuit 4. The circuit 1 and the circuit 2 are used to control the forward rotation of the motor to dissipate heat, and the circuit 3 and the circuit 4 are used to control the reverse rotation of the motor to exhaust and heat.

2. The microcomputer protection, measurement and control heat dissipation circuit device according to claim 1 is characterized in that: The circuit 1 comprises: An auxiliary relay FR1, a temperature switch TS1 connected in series with the auxiliary relay FR1, wherein the temperature switch TS1 is closed when the temperature is greater than 30°C; The auxiliary relay FR1 is connected to an auxiliary contactor KM1, which is used to control the contactor KM1 to close and make the motor M1 rotate forward.

3. The microcomputer protection, measurement and control heat dissipation circuit device according to claim 1 is characterized in that: The circuit 2 comprises: An auxiliary relay FR2, a temperature switch TS2 connected in series with the auxiliary relay FR2, wherein the temperature switch TS2 is closed when the temperature is greater than 45°C; The auxiliary relay FR2 is connected to an auxiliary contactor KM2, which is used to control the contactor KM2 to close and make the motor M2 rotate forward.

4. The microcomputer protection, measurement and control heat dissipation circuit device according to claim 1 is characterized in that: The circuit 3 comprises: An auxiliary relay FR1, wherein the auxiliary relay FR1 is connected in series with a temperature switch TS3; The temperature switch TS3 is connected to a resistor R1 and an auxiliary contactor KM3, and the temperature switch TS3 is closed when the temperature is lower than 15°C.

5. The microcomputer protection, measurement and control heat dissipation circuit device according to claim 1 is characterized in that: The circuit 4 comprises: Auxiliary relay FR2, wherein the auxiliary relay FR2 is connected in series with a temperature switch TS4; The temperature switch TS4 is connected to a resistor R2 and an auxiliary contactor KM4 , and the temperature switch TS4 is closed when the temperature is lower than 0° C.

6. The microcomputer protection, measurement and control heat dissipation circuit device according to claim 1 is characterized in that: The motor M1 and the motor M2 are connected to a thermal relay FR1 and a thermal relay FR2 respectively.

7. The microcomputer protection, measurement and control heat dissipation circuit device according to claim 1 is characterized in that: The motor M1 and the motor M2 are both arranged at the bottom of the microcomputer protection and measurement and control device.

8. The microcomputer protection, measurement and control heat dissipation circuit device according to claim 1 is characterized in that: The voltage of the three-phase power supply L1, L2, L3 is 380V.

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