CN213649284U - Vehicle-mounted air conditioner communication device, vehicle-mounted air conditioner system and vehicle - Google Patents
Vehicle-mounted air conditioner communication device, vehicle-mounted air conditioner system and vehicle Download PDFInfo
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- CN213649284U CN213649284U CN202022429914.3U CN202022429914U CN213649284U CN 213649284 U CN213649284 U CN 213649284U CN 202022429914 U CN202022429914 U CN 202022429914U CN 213649284 U CN213649284 U CN 213649284U
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Abstract
The utility model discloses a vehicle-mounted air conditioner communication device, vehicle-mounted air conditioning system and vehicle, the device includes: the high-voltage side is connected with the master control chip, and the low-voltage side is respectively connected with the CAN communication chip and the LIN communication chip. The utility model discloses on-vehicle air conditioner communication device reduces chip quantity through multiplexing isolation chip, practices thrift the cost.
Description
Technical Field
The utility model belongs to the technical field of the vehicle technique and specifically relates to a vehicle-mounted air conditioner communication device, vehicle-mounted air conditioning system and vehicle are related to.
Background
New energy technology has become the development trend of energy conservation and emission reduction in the vehicle industry, and new energy vehicles such as pure electric vehicles and hybrid electric vehicles are the trend in the vehicle industry at present. The heating system of the new energy vehicle can not use the heat of the engine and needs an independent heating module to meet the temperature requirement of a customer.
However, since the refrigeration compressor module and the heating module of the air conditioning system of the new energy vehicle, such as a PTC (Positive Temperature Coefficient) are controlled by separate control modules, separate high-voltage power input module, low-voltage input module, acquisition module and communication system are required, that is, two separate power supply and control driving systems are required, which is not advantageous in cost. When vehicle communication is performed, two communication modes are generally used, for example, CAN (Controller Area Network, CAN bus) communication and LIN (Local Interconnect Network ) communication, and based on the two communication modes, corresponding isolation processing needs to be performed through two isolation chips, so that communication between a master control MCU (Microcontroller Unit) and a CAN communication chip and a LIN communication chip is realized, and the cost is high and the space is occupied.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide an on-vehicle air conditioner communication device, the device can reduce the isolation chip quantity for communication, practices thrift the cost.
Two objects of the utility model are to provide an on-vehicle air conditioning system.
The utility model discloses a three aim at provides a vehicle.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides an on-vehicle air conditioner communication device, the device includes: a main control chip; a CAN communication chip and a LIN communication chip; the isolation chip comprises a high-voltage side and a low-voltage side, the high-voltage side is connected with the master control chip, and the low-voltage side is connected with the CAN communication chip and the LIN communication chip respectively.
According to the utility model discloses on-vehicle air conditioner communication device, main control chip sets up at the high-pressure side, keeps apart the high-pressure side and the main control chip of chip, keeps apart the low-pressure side of chip and is connected respectively with CAN communication chip and LIN communication chip, and both communication of CAN and LIN adopt an isolation chip promptly to, through the effective isolation integration of multiplexing isolation chip realization CAN and two kinds of communication modes of LIN, reduce and keep apart chip quantity, greatly reduced the cost.
In some embodiments, a high-voltage side of the isolation chip is provided with a first pin, a second pin, a third pin and a fourth pin; the first pin of the isolation chip is connected with a VDD power supply, the second pin of the isolation chip is connected with the data receiving end of the main control chip, the third pin of the isolation chip is connected with the data sending end of the main control chip, and the fourth pin of the isolation chip is grounded.
In some embodiments, a low voltage side of the isolation chip is provided with a fifth pin, a sixth pin, a seventh pin and an eighth pin; the isolation chip comprises a first pin, a second pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin, a fifth pin, a sixth pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin, a sixth pin, a seventh pin, a fourth pin, a LIN communication chip, a eighth pin, a VCC power supply and a third pin.
In some embodiments, a seventh pin of the CAN communication chip is connected with a vehicle-mounted CANH line, and a sixth pin of the CAN communication chip is connected with a vehicle-mounted CANL line.
In some embodiments, the second pin, the sixth pin and the eighth pin of the LIN communication chip are all connected to the VCC power supply, and the fourth pin of the LIN communication chip is connected to a vehicle-mounted LIN line.
In some embodiments, the in-vehicle air-conditioning communication device further includes: and the first end of the voltage stabilizing module is connected with the first pin of the isolation chip and the VDD power supply, the second end of the voltage stabilizing module is connected with the data sending end of the main control chip and the third pin of the isolation chip respectively, and the voltage stabilizing module is used for enabling the third pin of the isolation chip and the sixth pin of the isolation chip to be in a voltage stabilizing state when the VCC power supply is powered down and the VDD power supply is not powered down.
In some embodiments, the voltage stabilization module comprises: and a first end of the pull-up resistor is connected with the first pin of the isolation chip and the VDD power supply, and a second end of the pull-up resistor is connected with the third pin of the isolation chip. Through setting up pull-up resistor, make the third pin of keeping apart the chip be in confirms the level state all the time, avoid VDD power and VCC power supply to fall the electric time sequence difference, cause the signal transmission mistake to influence normal communication.
In some embodiments, the in-vehicle air-conditioning communication device further includes: and the external memory chip is connected with the main control chip and is used for storing main control data. Through increasing the external memory chip, realize the dilatation function of main control chip, need not to choose for use the bigger chip of memory for use, avoid the chip port to appear extravagantly, the cost is reduced.
In order to achieve the above object, an embodiment of a second aspect of the present invention provides an on-vehicle air conditioning system, including: an air conditioner controller; a compressor motor and a heating module; the compressor driving module and the heating driving module are arranged on the high-pressure side; the vehicle-mounted air conditioner communication device is characterized in that a main control chip of the vehicle-mounted air conditioner communication device is respectively connected with the compressor driving module and the heating driving module, and the vehicle-mounted air conditioner communication device is in communication connection with the air conditioner controller.
According to the utility model discloses on-vehicle air conditioning system, compressor drive module, heating drive module and host system chip all set up at the high-pressure side, need not to keep apart the design to compressor drive module and heating drive module are controlled by same host system chip, realize effective integration between them, and the cost is reduced to and, through adopting the on-vehicle air conditioner communication device of above embodiment, the isolation chip of multiplexing CAN and LIN communication CAN reduce the quantity that the chip was kept apart in the communication, the cost is reduced.
In order to achieve the above object, a third aspect of the present invention provides a vehicle including the vehicle-mounted air conditioning system mentioned in the above embodiment.
According to the utility model discloses vehicle adopts the on-vehicle air conditioning system of above embodiment, and on-vehicle communication system includes vehicle communication device, and the chip realizes the effective isolation integration of two kinds of communication methods of CAN and LIN through multiplexing isolation, CAN reduce the quantity of keeping apart the chip, reduce cost.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic diagram of an architecture of a new energy vehicle air conditioning system according to an embodiment of the present invention;
fig. 2 is a block diagram of an in-vehicle air conditioner communication device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a communication structure of CAN communication and LIN communication according to an embodiment of the present invention;
fig. 4 is a block diagram of an in-vehicle air conditioning system according to an embodiment of the present invention;
fig. 5 is a block diagram of a vehicle according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.
The utility model discloses new forms of energy vehicle air conditioning system's basic thinking does, effectively integrate two independent schemes of compressor module and heating module, for example, carry out the processing in unison with repeated resources such as low voltage power supply, high voltage power supply, the control unit, communication module, collection module, carry out reasonable the unity with the drive scheme, unite two into one the scheme of compressor module and heating module, optimized current hardware framework, temperature in can the real time control car, the best body sense of temperature in the realization car.
Fig. 1 is an architecture diagram of a new energy vehicle air conditioning system according to an embodiment of the present invention, and the following description is made with reference to fig. 1 to summarize the architecture of a vehicle-mounted air conditioning system according to an embodiment of the present invention.
As shown in fig. 1, the low voltage part includes a low voltage power supply and a communication part, the high voltage part includes a high voltage input module, a control module, a compressor driving module, a heating driving module, each power supply module, an acquisition module, and a peripheral circuit module of the control module, etc., and the load includes a compressor motor, a heating module body such as a PTC core, a temperature sensor, etc.
Wherein, the low-voltage power supply of the system, such as 12V low-voltage power supply, is input from the low-voltage power supply of the whole vehicle and is subjected to filtering processing so as to supply power for the low-voltage part of the air conditioning system. In some embodiments, a BDL (balanced dual-line) may be used to perform filtering processing in a wider frequency band, where the BDL is an integrated passive device and may replace a conventional LC filter and a common-mode inductor to perform EMI (Electromagnetic Interference) filtering, simplify Circuit design, and optimize a usage space of a PCB (Printed Circuit Board).
The low-voltage power supply is processed by the switching power supply chip and the isolation transformer device, so that the power supply requirement of the high-voltage side control loop is met. Specifically, the voltage transformation device, such as a DC-DC module, can be adjusted to process the input voltage to 18V, 15V, 6V, 5V or 3.3V according to actual needs to supply power to the control module and the driving module. The isolation transformer can achieve the effect of high-low voltage insulation and ensure the operation safety of users.
The communication loop receives demand information of a user for an air conditioning system, which is input by an air conditioner controller, through a CAN bus, and the demand information is communicated with a control module such as a main control MCU (micro control Unit) after being processed and isolated by an isolation device. The device also comprises a peripheral circuit module such as a programming module and a crystal oscillator module, an external memory module and an indicator light module, wherein the peripheral circuit module performs data interaction with the main control MCU.
The high-voltage input module obtains input voltage from a high-voltage power supply of the whole vehicle and provides power for the heating driving module and the compressor driving module. In some embodiments, the high voltage input module includes a filtering module, and the filtering module may use a combination of LC and BDL to effectively reduce noise transfer of the air conditioning system.
Wherein, the heating driving module, such as the PTC driving module, executes a heating command sent by the control module, such as a main control MCU, and transmits a signal to a power device, such as an IGBT (Insulated Gate Bipolar Transistor), through driving, so as to control the operating state of the PTC, so that it meets the temperature requirement of the customer.
The compressor driving Module executes a refrigeration command sent by the control Module, such as a main control MCU, and transmits a signal to an IPM (Intelligent Power Module) or an IGBT (insulated gate bipolar translator) through driving to control the operating state of the compressor motor, so that the compressor motor can meet the temperature requirement of a customer.
The acquisition module comprises a high-voltage current acquisition module, a high-voltage acquisition module and a high-voltage temperature acquisition module. The high-voltage temperature acquisition module acquires the whole control system hardware acquired by the temperature sensor in real time and the heating conditions of the IGBT and the IPM, and transmits the actual conditions to the MCU in real time; the high-voltage current acquisition module and the high-voltage acquisition module read the working state of the system voltage and current in real time and feed back normal and abnormal conditions to the master control MCU in real time.
The control module, such as the main control MCU module and the air conditioner controller, transmits and processes user instruction information to control the working states of the compressor and the PTC, monitors voltage, current and temperature information in real time, analyzes the working state, processes abnormal information in time and protects the system in a normal working state.
By last, in the embodiment of the utility model discloses an in, with compressor drive module and heating drive module for example PTC drive module integration setting in the high-pressure side to by same control module master control MCU control promptly, and both multiplexing low voltage power supply, high voltage power supply, communication module and gather partial module, this design can the maximize share basic circuit, save the PCB space, optimize temperature control system's hardware architecture, make the cost reach the biggest advantage. And the software control is facilitated, the product volume is reduced, the installation space of the whole vehicle is reduced, the layout requirement of the whole vehicle is reduced, and the convenience for designing the whole vehicle is improved.
Based on the framework of the vehicle-mounted air conditioning system of the embodiment, aiming at the integrated design that the compressor drive and the heating drive are combined into a whole, the specific implementation of each module in the framework is reasonably set and optimized, so that the compressor motor and the heating module are effectively controlled, the temperature in the vehicle is adjusted in real time, and the comfort in the vehicle is improved.
In the embodiment, two communication modes are usually designed in the vehicle, and the communication modes are selected by selecting and pasting different materials, so that the flexibility and the adaptability of the vehicle are improved, the development quantity of schemes is reduced, and the cost is saved.
An in-vehicle air conditioner communication device according to an embodiment of a first aspect of the present invention is described below with reference to fig. 2 to 3.
As shown in fig. 2, the vehicle-mounted air conditioner communication device 1 according to the embodiment of the present invention includes a main control chip 30, a CAN communication chip 40, a LIN communication chip 50, and an isolation chip 60.
The main control chip 30 is disposed on the high-voltage side, and the CAN communication chip 40 and the LIN communication chip 50 are disposed on the low-voltage side, so that the main control chip 30 cannot directly communicate with the communication chip, and the isolation chip 60 needs to be disposed to achieve communication between the main control chip 30 and the CAN communication chip 40 or between the main control chip 30 and the LIN communication chip 50.
The isolation chip 60 includes a high-voltage side connected to the main control chip 30 and a low-voltage side connected to the CAN communication chip 40 and the LIN communication chip 50, respectively. The communication signals sent by the main control chip 30 or the communication chip are isolated by the isolation chip 60, so that the communication safety is ensured.
In an embodiment, when the main control chip 30 communicates with the CAN communication chip 40 or the LIN communication chip 50, the CAN communication chip 40 or the LIN communication chip 50 receives a communication signal sent out by the main control chip 30, the communication signal is output from the main control chip 30 to the isolation chip 60, and then the communication signal is transmitted to the CAN communication chip 40 or the LIN communication chip 50 by the isolation chip 60, so that the main control chip 30 communicates with the two communication chips.
When an external inward input signal is input, a communication signal is input from the external inward input signal, such as an air conditioner remote controller, and reaches the isolation chip 60 through the CAN communication chip 40 or the LIN communication chip 50, and the communication signal is input to the main control chip 30 through the isolation chip 60, and when the main control chip 30 communicates with the two communication chips, the communication signal needs to be isolated through the isolation chip 60, so that the communication safety is ensured. And, through multiplexing the same isolated chip 60 to the isolated processing of communication signal, compare when carrying out CAN communication and LIN communication, adopt a plurality of isolated chips 60 to carry out the isolated processing to communication signal, the device has reduced the quantity of isolated chip through multiplexing isolated chip 60, the cost is reduced.
According to the utility model discloses on-vehicle air conditioner communication device 1, main control chip 30 sets up at the high-pressure side, keeps apart the high-pressure side and main control chip 30 of chip 60, keeps apart the low-pressure side of chip 60 and is connected respectively with CAN communication chip 40 and LIN communication chip 50, and CAN and LIN both communicate promptly and adopt one to keep apart chip 60 to, keep apart chip 60 through multiplexing and realize the effective isolation integration of two kinds of communication methods of CAN and LIN, reduce and keep apart chip 60 quantity, greatly reduced the cost.
In some embodiments, as shown in fig. 3, a schematic diagram of a communication circuit for CAN communication and LIN communication according to an embodiment of the present invention is shown. A first pin 1, a second pin 2, a third pin 3 and a fourth pin 4 are arranged on the high-voltage side of the isolation chip 60; the first pin 1 of the isolation chip 60 is connected to a VDD power supply, the second pin 2 of the isolation chip 60 is connected to a data receiving terminal of the main control chip 30, the third pin 3 of the isolation chip 60 is connected to a data transmitting terminal of the main control chip 30, and the fourth pin 4 of the isolation chip 60 is grounded. When the CAN communication is performed, the main control chip 30 sends out a level signal, and the signal is output from the data sending end of the main control chip 30, reaches the second pin 2 and the third pin 3 of the isolation chip 60, and forms signal intercommunication with the outside through the communication chip. An external inward input level signal, such as an inward input level signal of an air conditioner remote controller, may input a level signal to a data receiving terminal of the main control chip 30 through the second pin 2 and the third pin 3 of the isolation chip 60. The high-voltage side of the isolation chip 60 is provided with a second pin 2 and a third pin 3 for transmitting or receiving data, such as high and low level signals, so as to implement communication between the main control chip 30 and the communication chip.
In some embodiments, as shown in fig. 3, the low voltage side of the isolation chip 60 is provided with a fifth pin 5, a sixth pin 6, a seventh pin 7, and an eighth pin 8; the fifth pin 5 of the isolation chip 60 and the second pin 2 of the CAN communication chip are at the same potential, the sixth pin 6 of the isolation chip 60 is connected with the first pin 1 of the CAN communication chip, the seventh pin 7 of the isolation chip 60 is connected with the fourth pin 4 of the CAN communication chip 40 and the fifth pin 5 of the LIN communication chip 50, respectively, and the eighth pin 8 of the isolation chip 60 is connected with the VCC power supply and the third pin 3 of the CAN communication chip 40, respectively. The pins of the low-voltage side of the isolation chip 60 are correspondingly connected with the pins of the CAN communication chip 40, and the pins of the low-voltage side of the isolation chip 60 are correspondingly connected with the pins of the LIN communication chip 50, and are used for transmitting high and low level signals when the CAN communication or the LIN communication is performed.
In some embodiments, as shown in fig. 3, the seventh pin 7 of the CAN communication chip 40 is connected to the onboard CANH line, and the sixth pin 6 of the CAN communication chip 40 is connected to the onboard CANL line. When CAN communication is carried out, the main control chip 30 sends out a level signal, the signal is output from the pin of the main control chip 30 and reaches the second pin 2 and the third pin 3 of the isolation chip 60, then the sixth pin 6 and the seventh pin 7 of the isolation chip 60 are input into the first pin 1 and the fourth pin 4 of the CAN communication chip 40 through a TXD connecting line and an RXD connecting line, and finally signal intercommunication is formed between the vehicle-mounted CANH line of the sixth pin 6 and the CANL line of the seventh pin 7 of the CAN communication chip 40 and the outside. Signals are input from the outside to the inside, enter the CAN communication chip 40 from the outside, are input to the sixth pin 6 and the seventh pin 7 on the low-voltage side of the isolation chip 60 through the vehicle-mounted CANL line of the sixth pin 6 and the vehicle-mounted CANH line of the seventh pin 7 of the CAN communication chip 40, and are input to the main control chip 30 through the second pin 2 and the third pin 3 on the high-voltage side of the isolation chip 60, so that the bidirectional communication between the main control chip 30 and the communication chip is realized. The CANH signals and the CANL signals sent by the signals through the vehicle-mounted CANH line and the vehicle-mounted CANL line are a group of differential signals, and differential transmission is adopted, so that interference signals are eliminated, and the anti-interference capacity of communication signals is improved.
In some embodiments, as shown in fig. 3, the second pin 2, the sixth pin 6, and the eighth pin of the LIN communication chip 50 are all connected to the VCC power supply, and the fourth pin 4 of the LIN communication chip 50 is connected to the on-board LIN line. When the main control chip 30 communicates with the LIN communication chip 50, for example, when a signal is input from the outside, the signal reaches the fifth pin 5 from the fourth pin 4 of the external LIN communication chip 50, and is input to the seventh pin 7 on the low-voltage side of the isolation chip 60, and finally, the signal is input to the main control chip 30 through the second pin 2 on the high-voltage side of the isolation chip 60, so that the transmission of the signal from the outside to the inside is completed.
In some embodiments, as shown in fig. 3, the vehicle-mounted air conditioner communication device 1 further includes a voltage stabilizing module 21, the stability of signal transmission between the main control chip 30 and the isolation chip 60 can be improved by setting the voltage stabilizing module 21, a first end of the voltage stabilizing module 21 is connected to the first pin 1 of the isolation chip 60 and the VDD power supply, a second end of the voltage stabilizing module 21 is connected to the data transmitting end of the main control chip 30 and the third pin 3 of the isolation chip 60, respectively, and is configured to enable the third pin 3 of the isolation chip 60 and the sixth pin 6 of the isolation chip 60 to be in a voltage stabilizing state when the VCC power supply is powered down and the VDD power supply is not powered down. For example, when the vehicle is stopped and enters a sleep state, the VDD power supply can maintain tens of milliseconds for storing product failure information after the vehicle stops supplying low voltage power, therefore, the power-down timing of the VCC power supply and the VDD power supply is different, that is, the VCC power supply is powered down first, and the VDD power supply is powered down later, so that the sixth pin 6 of the isolation chip 60 outputs an error frame signal when the power-down timing of the two power supplies is different, at this time, the voltage signal at the third pin 3 of the isolation chip 30 is changed into a determined voltage signal by adding the voltage stabilizing module 21, that is, the voltage signal output by the VDD power supply is sent to the third pin 3 of the isolation chip 30 through the voltage stabilizing module 21, so that the third pin 3 at the high voltage side of the isolation chip 60 and the sixth pin 6 at the low voltage side of the isolation chip 60 are in a determined level state, even if the VCC power supply is unstable, the third pin 3 and the sixth pin 6 of, the accuracy of signal transmission is guaranteed.
In some embodiments, the voltage regulation module 21 includes a pull-up resistor R1, a first terminal of the pull-up resistor R1 is connected to the first pin 1 of the isolation chip 60 and the VDD power supply, and a second terminal of the pull-up resistor R1 is connected to the third pin 3 of the isolation chip 60. The voltage signal output by the VDD power supply is directly supplied to the third pin 3 through the first pin 1, so that the third pin 3 of the isolation chip 60 is always in a determined level state, and the condition that the power failure time sequences of the VDD power supply and the VCC power supply are different, so that signal transmission errors are caused, and normal communication is influenced is avoided.
In some embodiments, the vehicle-mounted air conditioner communication device 1 further includes an external memory chip 22, and the external memory chip 22 is connected to the main control chip 30 for storing the main control data. The device has realized the multiplexing of singlechip for example isolation chip 60 in the design, because integrated program is great, the memory data is more, need bigger storage space, but if choose for use the bigger chip of memory probably the chip port is extravagant, increase cost, in the embodiment, under the condition that satisfies port resource demand, through increasing external memory chip 22, realize the extended capacity function of main control chip 30, main control chip 30 is used for the information that the storage need not frequently read, port resource waste can not appear yet, very big saving the cost.
In conclusion, according to the utility model discloses on-vehicle air conditioner communication device 1, main control chip 30 sets up at the high-pressure side, keeps apart the high-pressure side and the main control chip 30 of chip 60, and the low-pressure side that keeps apart chip 60 is connected respectively with CAN communication chip 40 and LIN communication chip 50, and CAN and LIN both communicate promptly and adopt an isolation chip 60 to, through the effective isolation integration that multiplexing isolation chip 60 realized CAN and LIN two kinds of communication methods, reduce isolation chip 60 quantity, greatly reduced the cost.
An on-vehicle air conditioning system according to a second aspect of the present invention will be described with reference to the drawings.
Fig. 4 is a block diagram of an in-vehicle air conditioning system according to an embodiment of the present invention. As shown in fig. 4, the vehicle air conditioning system 2 of the embodiment of the present invention includes a compressor motor 32, a heating module 31, an air conditioner controller 33, a compressor driving module 10, a heating driving module 20, and the vehicle air conditioning communication device 1 mentioned in the above embodiment. The main control chip 30 of the vehicle-mounted air conditioner communication device 1 is respectively connected with the compressor driving module 10 and the heating driving module 20, and the vehicle-mounted air conditioner communication device 1 is in communication connection with the air conditioner controller 33.
In the embodiment, the compressor driving module 10, the heating driving module 20, and the main control chip 30 are disposed at the high pressure side, and thus, an isolation driving is not required. That is, the compressor driving module 10 and the heating driving module 20 are integrated and controlled by the same main control chip 30, and there is no need to provide two independent sets of control units, thereby reducing the cost. And, with the vehicle-mounted air conditioner communication device 1 mentioned in the above embodiment, communication between the vehicle-mounted air conditioner communication device 1 and the air conditioner remote controller is realized by multiplexing the isolation chip 60.
According to the utility model discloses on-vehicle air conditioning system 2, compressor drive module 10, heating drive module 20 and main control chip 30 all set up at the high-pressure side, need not to keep apart the design, and compressor drive module 10 and heating drive module 20 are controlled by same main control chip 30, realize effective integration between them, the cost is reduced, and, through adopting the on-vehicle air conditioner communication device 1 of above embodiment, the isolation chip 60 of multiplexing CAN and LIN communication, CAN reduce the quantity that communication kept apart chip 60, the cost is reduced.
A vehicle according to an embodiment of a third aspect of the present invention is described below with reference to the drawings.
Fig. 5 is a block diagram of a vehicle according to an embodiment of the present invention. As shown in fig. 5, a vehicle 3 according to an embodiment of the present invention includes the vehicle-mounted air conditioning system 2 according to the above-described embodiment.
According to the utility model discloses vehicle 3 adopts the on-vehicle air conditioning system 2 of above embodiment, and on-vehicle communication system includes vehicle-mounted communication device 1, realizes the effective isolation integration of two kinds of communication methods of CAN and LIN through multiplexing isolation chip 60, CAN reduce the quantity of keeping apart chip 60, reduce cost.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An on-vehicle air conditioner communication device, characterized by comprising: a main control chip;
a CAN communication chip and a LIN communication chip;
the isolation chip comprises a high-voltage side and a low-voltage side, the high-voltage side is connected with the master control chip, and the low-voltage side is connected with the CAN communication chip and the LIN communication chip respectively.
2. The on-vehicle air-conditioning communication device according to claim 1,
a first pin, a second pin, a third pin and a fourth pin are arranged on the high-voltage side of the isolation chip;
the first pin of the isolation chip is connected with a VDD power supply, the second pin of the isolation chip is connected with the data receiving end of the main control chip, the third pin of the isolation chip is connected with the data sending end of the main control chip, and the fourth pin of the isolation chip is grounded.
3. The on-vehicle air-conditioning communication device according to claim 2,
a fifth pin, a sixth pin, a seventh pin and an eighth pin are arranged on the low-voltage side of the isolation chip;
the isolation chip comprises a first pin, a second pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin, a fifth pin, a sixth pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin, a sixth pin, a seventh pin, a fourth pin, a LIN communication chip, a eighth pin, a VCC power supply and a third pin.
4. The on-vehicle air conditioner communication device of claim 3, wherein a seventh pin of the CAN communication chip is connected with an on-vehicle CANH line, and a sixth pin of the CAN communication chip is connected with an on-vehicle CANL line.
5. The vehicle-mounted air conditioner communication device as claimed in claim 3, wherein the second pin, the sixth pin and the eighth pin of the LIN communication chip are all connected with the VCC power supply, and the fourth pin of the LIN communication chip is connected with a vehicle-mounted LIN line.
6. The on-vehicle air-conditioning communication device according to claim 3, characterized by further comprising:
and the first end of the voltage stabilizing module is connected with the first pin of the isolation chip and the VDD power supply, the second end of the voltage stabilizing module is connected with the data sending end of the main control chip and the third pin of the isolation chip respectively, and the voltage stabilizing module is used for enabling the third pin of the isolation chip and the sixth pin of the isolation chip to be in a voltage stabilizing state when the VCC power supply is powered down and the VDD power supply is not powered down.
7. The on-vehicle air conditioner communication device according to claim 6, wherein the voltage stabilization module includes:
and a first end of the pull-up resistor is connected with the first pin of the isolation chip and the VDD power supply, and a second end of the pull-up resistor is connected with the third pin of the isolation chip.
8. The on-vehicle air-conditioning communication device according to claim 1, characterized by further comprising:
and the external memory chip is connected with the main control chip and is used for storing main control data.
9. An in-vehicle air conditioning system, comprising:
an air conditioner controller;
a compressor motor and a heating module;
the compressor driving module and the heating driving module are arranged on the high-pressure side;
the on-vehicle air conditioner communication device of any one of claims 1-8, a main control chip of the on-vehicle air conditioner communication device is connected with the compressor driving module and the heating driving module respectively, and the on-vehicle air conditioner communication device is in communication connection with the air conditioner controller.
10. A vehicle characterized by comprising the on-vehicle air conditioning system of claim 9.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023023975A1 (en) * | 2021-08-25 | 2023-03-02 | 华为技术有限公司 | Chip, chip manufacturing method, and related apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023023975A1 (en) * | 2021-08-25 | 2023-03-02 | 华为技术有限公司 | Chip, chip manufacturing method, and related apparatus |
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