Driving, control and display integrated vehicle-mounted refrigerator electric control structure

Abstract

The utility model belongs to the technical field of vehicle-mounted refrigerator control, and particularly relates to a drive-control-display integrated vehicle-mounted refrigerator electric control structure. The power supply processing circuit is connected with the main control MCU to supply power; the main control MCU, the display unit, the key control module and the detection unit are used for displaying, controlling and detecting the state of the refrigerator; the main control MCU is further connected with the control unit and the driving unit, the control unit is connected with an external fan / heating module, and the driving unit is connected with the compressor. According to the utility model, by combining the functions of each dispersed electric control module, each function is effectively unified on one PCBA, a connection structure is directly improved, a connection wire harness is removed, the assembly complexity is reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of in-vehicle refrigerator control, and particularly relates to an integrated drive, control and display in-vehicle refrigerator electronic control structure. Background Art

[0002] In the current electronic control topology structure of refrigerators, the compressor drive is provided as a module by the compressor manufacturer or separately by an external agency, and the shape is relatively large. Such an independent module inevitably needs to be connected to it with a wiring harness, which invisibly increases the complexity of assembly, increases the material cost of the wiring harness, and reduces the available space in the refrigerator structure design. And the independent display part also needs a wiring harness to be connected to the main control or the module, which further exacerbates the complexity of production and assembly, reduces the available space, increases the instability between the wiring harness connectors, and increases the cost. Content of the Utility Model

[0003] To solve the defects and deficiencies of the prior art; the purpose of the utility model is to provide an integrated drive, control and display in-vehicle refrigerator electronic control structure with simple structure, reasonable design and convenient use. It combines the functions of each dispersed electronic control module, effectively unifies each function onto a single PCBA, directly improves the connection structure, removes the connecting wiring harness, reduces the assembly complexity, and reduces the cost.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: it includes a main control MCU, a power supply processing circuit, a display unit, a key control module, a detection unit, a control unit, a drive unit, a fan / heater module, and a compressor; the power supply processing circuit is connected to the main control MCU for power supply; and the main control MCU is connected to the display unit, the key control module, and the detection unit for displaying, controlling and detecting the state of the refrigerator; and the main control MCU is also connected to the control unit and the drive unit, the control unit is connected to the external fan / heater module, and the drive unit is connected to the compressor.

[0005] Preferably, the main control MCU is composed of a dedicated chip for high-performance motor drive such as a motor control engine, AD detection and an 8051 core.

[0006] Preferably, the main control MCU, the power supply processing circuit, the display unit, the key control module, the detection unit, the control unit, and the drive unit are all integrated on the PCBA.

[0007] Preferably, the power supply processing circuit is directly connected to the in-vehicle refrigerator power supply or the vehicle power supply through a connection jack.

[0008] Preferably, the main control MCU controls the on / off of the compressor and the fan / heater module through the IO via a switching MOS transistor, and the detection unit feeds back the state by detecting the switching MOS transistor.

[0009] After adopting the above structure, the beneficial effects of the present utility model are as follows:

[0010] By combining the functions of each decentralized electronic control module, it effectively unifies various functions onto one PCBA, directly improving the connection structure, removing the connecting wire harness, reducing the assembly complexity, and lowering the cost.

[0011] At the same time, it also reduces manual operations. Since it is integrated on one PCBA, automated production can be carried out, using fully automated production lines such as chip mounters, insertion machines, wave soldering machines, and reflow soldering machines, which also improves the product quality invisibly. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the present utility model will be described in detail by the following specific embodiments and the accompanying drawings.

[0013] Figure 1 It is a schematic structural diagram of the present utility model;

[0014] Figure 2 It is a schematic structural diagram of the main control MCU1 of the present utility model;

[0015] Figure 3 It is a schematic structural diagram of the power supply processing circuit 2 of the present utility model;

[0016] Figure 4 It is a schematic structural diagram of the driving unit 7 of the present utility model;

[0017] Figure 5 It is a schematic structural diagram of the display unit 3 of the present utility model;

[0018] Description of the reference numerals: main control MCU1, power supply processing circuit 2, display unit 3, key control module 4, detection unit 5, control unit 6, driving unit 7, fan / heating module 8, compressor 9. Detailed Embodiment

[0019] To make the purpose, technical solutions, and advantages of the present utility model clearer and more understandable, the present utility model will be described by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and do not limit the scope of the present utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concept of the present utility model.

[0020] Here, it should also be noted that in order to avoid obscuring the present utility model due to unnecessary details, only the structures and / or processing steps closely related to the solution of the present utility model are shown in the drawings, while other details less related to the present utility model are omitted.

[0021] Refer to, as shown in Figures 1 - 5 This specific embodiment adopts the following technical solutions: It includes a main control MCU 1, a power processing circuit 2, a display unit 3, a button control module 4, a detection unit 5, a control unit 6, a driving unit 7, a fan / heating module 8, and a compressor 9; the power processing circuit 2 is connected to the main control MCU 1 for power supply; and the main control MCU 1 is connected to the display unit 3, the button control module 4, and the detection unit 5 for displaying, controlling, and detecting the state of the refrigerator; and the main control MCU 1 is also connected to the control unit 6 and the driving unit 7, the control unit 6 is connected to the external fan / heating module 8, and the driving unit 7 is connected to the compressor 9.

[0022] Among them, the main control MCU 1 is composed of a motor control engine, AD detection, and a dedicated chip for high-performance motor drive such as an 8051 core; the main control MCU 1, the power processing circuit 2, the display unit 3, the button control module 4, the detection unit 5, the control unit 6, and the driving unit 7 are all integrated on the PCBA; the power processing circuit 2 is directly connected to the in-vehicle refrigerator power supply or the in-vehicle power supply through a connection jack; the main control MCU 1 controls the on / off of the compressor 9 and the fan / heating module 8 through the IO via a switching MOS tube, and the detection unit 5 feeds back the state by detecting the switching MOS tube.

[0023] The working principle of this specific embodiment is as follows: Drive, control, and display integration: Using a dedicated chip integrating a motor control engine, AD detection, and an 8051 core for high-performance motor drive as the main control MCU, the operation and control of the compressor motor can be automatically completed by the hardware, and at the same time, the temperature value, working current, and other peripheral circuit parameters can be detected through its own AD detection port.

[0024] Power supply end: The power input end of the PCBA directly uses the power input end of the refrigerator, that is, the socket at the power input end on the refrigerator shell and the power input socket on the PCBA are unified into one, using a common 8-shaped socket on the market and directly welding it to the PCBA; during assembly, directly place the PCBA welded with the power DC socket near the position of the refrigerator DC socket, and let the DC socket welded to the PCBA be directly assembled into the overall power input port of the refrigerator; eliminate the power connection wire between the DC socket at the power input end and the PBCA; in the circuit, a DC-DC chip with a wide input voltage range (4.5V - 60V) is used to provide 12V working voltage for each circuit, and then an LDO chip is used to regulate the voltage to 5V to provide the working voltage for each chip. At the same time, a series MOS tube is used at the power supply end to achieve the purpose of preventing reverse power connection; in addition, the detection of the input voltage is read by the voltage division method of pull-up and pull-down resistors.

[0025] Display end: Using 1652 series integrated LED driver IC, the main control system MCU only needs to input display data through its own UART TX, and the SDA of the 1652 driver chip receives data to directly drive the display. The main control MCU does not need to output IO ports one by one to control the LED display; the LED end is directly connected to the 1652 driver.

[0026] Control side: The main control MCU controls the compressor, fan and other loads through the IO port through the switch MOS tube. The working current of the fan, the working current of the compressor, and the temperature detection of the NTC are sampled by voltage through the AD port of the main control MCU to determine whether the work is normal. In addition, the MOS tube device driven by the compressor motor is equipped with a thermistor to detect the working status of the MOS tube at all times, determine whether the upper limit of the working temperature is reached, and protect the normal operation of the circuit. In addition, the drive of the compressor motor is directly controlled by the high-performance motor pre-drive dedicated IO port of the main control MCU to control three groups of MOS tubes, a total of 6, for driving.

[0027] Beneficial effects of this specific implementation method: 1. This solution integrates the compressor drive, fan control, temperature detection, data display, key operation, power input DC socket, etc. of the vehicle refrigerator electronic control into one, without the need to be dispersed into multiple PCBAs; while simplifying the electronic control topology, it also improves reliability, reduces production costs, and simplifies PCBA material preparation, inspection, warehousing and other links;

[0028] 2. The integrated solution of drive, control and display eliminates the connection between scattered PCBAs, reduces the connection harness, reduces costs and is more energy-saving and environmentally friendly. In this way, there is no virtual connection or virtual insertion at the connection, which is more reliable and stable, and avoids unstable factors such as poor contact caused by aging of the connection after long-term work;

[0029] 3. The integrated PCBA solution of drive, control and display also simplifies the production and assembly process. There is no connection between scattered PCBAs. You only need to install the only main control PCBA in the planned position of the refrigerator; and the DC socket integrated on the PCBA directly corresponds to the power input plug position outside the refrigerator; in this way, there is no connecting wire between the main control PCBA and the external power input terminal of the refrigerator. The DC socket on the PCBA and the PCBA are directly fixed on the power input port of the refrigerator, and the main control PCBA is directly connected to the compressor, fan, probe and other loads inside the refrigerator.

[0030] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model.

[0031] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A drive, control and display integrated vehicle refrigerator electric control structure, characterized in that: It includes a main control MCU, a power processing circuit, a display unit, a button control module, a detection unit, a control unit, a drive unit, a fan / heating module, and a compressor; the power processing circuit is connected to the main control MCU for power supply; and the main control MCU and the display unit, the button control module, and the detection unit display, control, and detect the state of the refrigerator; and the main control MCU is also connected to the control unit and the drive unit, the control unit is connected to the external fan / heating module, and the drive unit is connected to the compressor.

2. The electric control structure of a vehicle refrigerator with integrated drive, control and display according to claim 1, characterized in that: The main control MCU is composed of a motor control engine, AD detection and an 8051 core high-performance motor drive dedicated chip.

3. The electric control structure of a vehicle refrigerator with integrated drive, control and display according to claim 1, characterized in that: The main control MCU, power processing circuit, display unit, key control module, detection unit, control unit and drive unit are all integrated on the PCBA.

4. The electric control structure of a vehicle refrigerator with integrated drive, control and display according to claim 1, characterized in that: The power processing circuit is directly connected to the vehicle refrigerator power supply or the vehicle power supply via a connection socket.

5. The electric control structure of a vehicle refrigerator with integrated drive, control and display according to claim 1, characterized in that: The main control MCU controls the compressor and the fan / heating module on and off through the IO via the switch MOS tube, and the detection unit performs status feedback by detecting the switch MOS tube.

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