Circuit of vehicle-mounted refrigerator compressor controller and vehicle-mounted refrigerator

Abstract

The utility model relates to the technical field of electronic circuits, and discloses a circuit of a vehicle-mounted refrigerator compressor controller, which comprises an alternating current input module used for connecting external alternating current to the compressor controller and comprising a first circuit and a second circuit, the first circuit comprises an AC end, a first capacitor C1, a first inductor R1, a single-stage PFC controller, a first grounding terminal GND1 and a second grounding terminal GND2, and the AC end is used for connecting external alternating current to the first circuit; the second circuit comprises a second capacitor C2, a second inductor R2 and a diode; and the direct current input module is used for connecting external direct current into the compressor controller.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic circuit technical field, in particular to a kind of circuit and vehicle refrigerator of vehicle refrigerator compressor controller. BACKGROUND

[0002] Vehicle refrigerator as one of important accessories of modern automobile life, gradually from high-end vehicle popularization to ordinary private car, even some home users also hope to use vehicle refrigerator at home. However, the traditional design of vehicle refrigerator is mainly aimed at vehicle direct-current power supply environment, and is usually powered by 12V or 24V battery of vehicle. This design makes vehicle refrigerator very convenient when used in vehicle interior, but not flexible enough when used in household or other AC power supply environment, and needs to be additionally configured with AC adapter.

[0003] In order to improve user experience, enterprises begin to try to design AC / DC integrated vehicle refrigerator compressor controller, and some enterprises adopt the design of simple built-in flyback conversion circuit. This design converts AC into required DC through flyback converter, thereby driving compressor to work. However, since this design does not contain power factor correction (PFC) circuit, its power factor is usually low, generally between 0.5-0.7, and the lower the power factor, the greater the reactive power absorbed by the device from the power grid, which not only leads to the decline of power grid efficiency, but also may cause problems such as power grid voltage fluctuation and current harmonic, therefore, this simple built-in flyback conversion circuit design has been unable to meet the latest energy efficiency standard requirements. Some enterprises begin to adopt the design of built-in two-stage circuit. This design divides the circuit into two parts: front stage and rear stage. The front stage is PFC power factor correction circuit, used to improve power factor and reduce the absorption of reactive power; the rear stage is high-frequency DC / DC circuit, used to convert the corrected DC into the required DC of compressor. The design of built-in two-stage circuit is more complex in circuit, and needs more components and more delicate layout and wiring. This not only increases the difficulty of design and production, leading to cost rise. SUMMARY

[0004] The technical problem to be solved by the utility model is to solve the problems of high cost and complex circuit of existing vehicle refrigerator compressor controller with high power factor.

[0005] In order to solve the above technical problems, the utility model provides a kind of circuit of vehicle refrigerator compressor controller, the circuit includes:

[0006] An alternating current input module is configured to connect external alternating current to the compressor controller, the alternating current input module comprising a first circuit and a second circuit, the first circuit comprising an AC terminal, a first capacitor C1, a first inductor R1, a single-stage PFC controller, a first ground terminal GND1, and a second ground terminal GND2, the AC terminal being configured to connect external alternating current to the first circuit, a positive pole of the AC terminal, the first capacitor C1, the first inductor R1, and the first ground terminal GND1 being connected in sequence by a conductor, the single-stage PFC controller being connected between the second inductor R2 and the second ground terminal GND2, and a negative pole of the AC terminal being connected to the first ground terminal GND1, the second circuit comprising a second capacitor C2, a second inductor R2, and a diode, a positive pole of the second capacitor C2, a negative pole of the diode, a positive pole of the diode, the second inductor R2, and a negative pole of the second capacitor C2 being connected in sequence, the first inductor R1 being arranged opposite to the second inductor R2.

[0007] A direct current input module is configured to connect external direct current to the compressor controller.

[0008] Further, the first capacitor C1 is a non-electrolytic capacitor.

[0009] Further, the first circuit further comprises an electromagnetic interference filter, the electromagnetic interference filter being connected between the AC terminal and the first capacitor C1.

[0010] Further, the first circuit further comprises a power factor detection module, the power factor detection module being configured to detect a power factor of the circuit in real time.

[0011] Further, the direct current input module comprises a DC-DC converter.

[0012] Further, the first inductor R1 and the second inductor R2 are made of ferrite material.

[0013] The utility model embodiment further provides a refrigerator comprising the circuit of the compressor controller according to any one of the above.

[0014] Compared with the prior art, the circuit of the vehicle-mounted refrigerator compressor controller has the following beneficial effects:

[0015] The utility model embodiment reduces the cost of the circuit of the vehicle refrigerator compressor controller, solves the problem of complex circuit of the vehicle refrigerator compressor controller with high power factor, and optimizes the circuit of the vehicle refrigerator compressor controller.

[0016] The utility model embodiment reduces the cost of the circuit of the vehicle refrigerator compressor controller, solves the problem of complex circuit of the vehicle refrigerator compressor controller with high power factor, and optimizes the circuit of the vehicle refrigerator compressor controller. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structural drawing of the circuit of the vehicle refrigerator compressor controller provided by the utility model embodiment;

[0018] Figure 2 It is the circuit diagram of the circuit of the vehicle refrigerator compressor controller provided by the utility model embodiment;

[0019] Figure 3 It is another circuit diagram of the first circuit provided by the utility model embodiment. DETAILED DESCRIPTION

[0020] The exemplary embodiments of the utility model are described below in conjunction with the drawings, which include various details of the utility model embodiments to help understanding, and they should be considered only as exemplary. Therefore, those skilled in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope of the utility model. Similarly, in order to be clear and concise, the description in the following is omitted to the known functions and structures.

[0021] As Figures 1-3 Shown in the utility model one optional embodiment, a kind of circuit of vehicle refrigerator compressor controller, the circuit includes:

[0022] An AC input module for connecting external AC power to the compressor controller, the AC input module comprising a first circuit and a second circuit, the first circuit comprising an AC terminal for connecting external AC power to the first circuit, a first capacitor C1, a first inductor R1, a single-stage PFC controller, a first ground terminal GND1, and a second ground terminal GND2, the positive terminal of the AC terminal, the first capacitor C1, the first inductor R1, and the first ground terminal GND1 being connected in sequence by a conductor, the single-stage PFC controller being connected between the second inductor R2 and the second ground terminal GND2, and the negative terminal of the AC terminal being connected to the first ground terminal GND1; the second circuit comprising a second capacitor C2, a second inductor R2, and a diode, the positive terminal of the second capacitor C2, the negative terminal of the diode, the positive terminal of the diode, the second inductor R2, and the negative terminal of the second capacitor C2 being connected in sequence, the first inductor R1 being arranged opposite the second inductor R2;

[0023] A DC input module for connecting external DC power to the compressor controller.

[0024] wherein, Figure 1 is a structure diagram of a circuit of a vehicle-mounted refrigerator compressor controller provided by the embodiment of the utility model, the AC input module is connected with external AC power, the external AC power generally comes from a power grid, the AC input module is used as an input terminal of the vehicle-mounted refrigerator compressor controller, the DC input module is used for connecting external DC power to the circuit of the compressor controller, and is also used as an input terminal of the circuit of the vehicle-mounted refrigerator compressor controller, the AC input module and the DC input module can be independently used as the input terminal of the circuit of the vehicle-mounted refrigerator compressor controller respectively, so that the circuit of the vehicle-mounted refrigerator compressor controller is integrated with AC and DC;

[0025] wherein, the single-stage PFC controller in the circuit can not only realize power factor correction, but also realize DC-DC conversion function by setting a DC-DC module in the PFC controller;

[0026] wherein, the compressor controller is internally provided with a compressor drive circuit comprising compressor drive software, the compressor drive software feeds back circuit voltage parameters detected by the compressor drive, then calculates the required PWM duty cycle by the compressor drive, adjusts the output voltage by the duty cycle, so that the circuit well adapts to voltage fluctuation caused by the single-stage PFC controller.

[0027] In the utility model embodiment, the utility model embodiment sets up single stage PFC controller in AC input module, the single stage PFC controller can realize power factor correction function, improves power factor, reduces harmonic distortion, and can realize through a power tube, although the ripple of single stage PFC controller output voltage is big, but the drive circuit in compressor controller has the function of automatically adjusting voltage, can be well adapted to the voltage fluctuation brought by this single stage PFC controller, and the combination guarantees the stable operation of the vehicle refrigerator compressor controller, which can effectively improve the power factor of the vehicle refrigerator compressor controller, and meet the energy efficiency standard requirements.

[0028] In conclusion, the utility model embodiment reduces the cost of the circuit of the vehicle refrigerator compressor controller, solves the problem of complex circuit of the vehicle refrigerator compressor controller with high power factor, and optimizes the circuit of the vehicle refrigerator compressor controller.

[0029] In an optional embodiment of the utility model, the first capacitor C1 is a non-electrolytic capacitor.

[0030] The non-electrolytic capacitor is a metal foil capacitor, and its structure usually includes two metal foils as electrodes and an organic film (such as a polyester film, a polypropylene film) or an aluminum oxide film as a medium sandwiched between them. This capacitor does not use liquid electrolyte, so it is called a non-electrolytic capacitor.

[0031] Specifically, the non-electrolytic capacitor is made of high-strength metal foil, and its volume is smaller than that of the traditional electrolytic capacitor. This is a significant advantage for the vehicle refrigerator compressor controller with limited circuit board space. The non-electrolytic capacitor does not contain electrolyte, so its service life is longer than that of the electrolytic capacitor.

[0032] In the utility model, setting the first capacitor C1 in the vehicle refrigerator compressor controller as a non-electrolytic capacitor not only improves the stability and reliability of the circuit, but also reduces the maintenance cost; at the same time, the excellent performance of the non-electrolytic capacitor also helps to simplify the circuit design.

[0033] In an optional embodiment of the utility model, the first circuit further includes an electromagnetic interference filter, and the electromagnetic interference filter is connected between the AC end and the first capacitor C1.

[0034] The electromagnetic interference filter is used to reduce the electromagnetic interference introduced by external alternating current and improve the anti-interference ability and stability of the circuit.

[0035] In an optional embodiment of the utility model, the first circuit further includes a power factor detection module, and the power factor detection module is used to detect the power factor of the circuit in real time.

[0036] The power factor detection module adjusts the working parameters of the single-stage PFC controller according to the detection result, so that the entire circuit can always operate in a high power factor state. The main function of the module is to detect the power factor of the first circuit in real time. The power factor is an important indicator of the efficiency of AC circuit, which reflects how much of the apparent power output by the power supply is active power. Real-time detection of power factor helps to discover the problem of low power factor in the circuit in a timely manner, which usually means that there is reactive power loss in the circuit, that is, the electric energy is not effectively utilized. Timely discovery and correction of the low power factor problem can ensure that the circuit always operates efficiently and reduces energy waste.

[0037] In the embodiment of the utility model, by increasing the power factor detection module and adjusting the working parameters of the single-stage PFC controller in the first circuit, the utility model can ensure that the circuit always operates in a high power factor state, improve the electric energy utilization efficiency of the circuit and reduce energy waste.

[0038] In an optional embodiment of the utility model, the direct current input module comprises a DC-DC converter, which is used to convert external direct current into a voltage level suitable for the operation of the compressor controller while maintaining a high energy conversion rate.

[0039] In an optional embodiment of the utility model, the first inductor R1 and the second inductor R2 are ferrite materials.

[0040] The ferrite material is a ferrite compound containing nickel-zinc (NiZn) or manganese-zinc (MnZn), which belongs to a soft magnetic ferromagnetic material with low coercivity. In the inductor, the inductance of the ferrite material can enhance the performance of the inductor, such as increasing the inductance value and reducing the loss. The selection of such material helps to improve the performance of the inductor and the efficiency of the circuit of the entire compressor controller.

[0041] The embodiment of the utility model provides a vehicle-mounted refrigerator, which comprises the circuit of the compressor controller according to any one of the above.

[0042] The refrigerator comprises the corresponding structure of the circuit of the compressor controller according to any one of the above embodiments, and can also realize the corresponding operation. The circuit structure and the corresponding functions of the vehicle-mounted refrigerator are not described here.

[0043] It should be noted that the vehicle-mounted refrigerator comprises at least one storage compartment, such as a refrigeration compartment and / or a freezing compartment, for storing items with preservation or freezing requirements. The vehicle-mounted refrigerator further comprises a refrigeration system for performing refrigeration operation of the refrigerator.

[0044] The specific embodiments described above do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. A circuit for a vehicle-mounted refrigerator compressor controller, characterized in that, The circuit includes: An AC input module is provided for connecting external AC power to a compressor controller. The AC input module includes a first circuit and a second circuit. The first circuit includes an AC terminal, a first capacitor C1, a first inductor R1, a single-stage PFC controller, a first grounding terminal GND1, and a second grounding terminal GND2. The AC terminal is used to connect external AC power to the first circuit. The positive terminal of the AC terminal, the first capacitor C1, the first inductor R1, and the first grounding terminal GND1 are connected sequentially via conductors. The negative terminal of the AC terminal is connected to the first grounding terminal GND1. The second circuit includes a second capacitor C2, a second inductor R2, and a diode. The positive terminal of the second capacitor C2, the negative terminal of the diode, the positive terminal of the diode, the second inductor R2, and the negative terminal of the second capacitor C2 are connected sequentially. The single-stage PFC controller is connected between the second inductor R2 and the second grounding terminal GND2. The first inductor R1 and the second inductor R2 are positioned opposite each other. A DC input module is provided for connecting external DC power to the compressor controller.

2. The circuit according to claim 1, characterized in that, The first capacitor C1 is a non-electrolytic capacitor.

3. The circuit according to claim 1, characterized in that, The first circuit also includes an electromagnetic interference filter, which is connected between the AC terminal and the first capacitor C1.

4. The circuit according to claim 1, characterized in that, The first circuit also includes a power factor detection module, which is used to detect the power factor of the circuit in real time.

5. The circuit according to claim 1, characterized in that, The DC input module includes a DC-DC converter.

6. The circuit according to claim 1, characterized in that, The first inductor R1 and the second inductor R2 are made of ferrite material.

7. A vehicle-mounted refrigerator, characterized in that, The circuit includes the compressor controller as described in any one of claims 1 to 6.

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