Vehicle-mounted air conditioning system based on millimeter wave isolation communication

Abstract

The utility model provides a vehicle-mounted air conditioning system based on millimeter wave isolation communication. The vehicle-mounted air conditioning system comprises an air conditioning driver, a millimeter wave isolation module, a central control unit VCU and an automobile bus, one end of the millimeter wave isolation module is connected with the central control unit VCU through an automobile bus, and the other end of the millimeter wave isolation module is connected with the air conditioner driver through another automobile bus. The utility model provides a brand new isolation scheme, and the millimeter wave isolation module is matched with the automobile bus to realize isolated communication transmission between the air conditioner driver and the central control unit VCU. The safety and reliability of isolated communication can be remarkably improved, and interference brought by an air conditioner driver to a central control unit VCU is effectively isolated; and the millimeter wave isolation module has the characteristics of high transmission speed, small time delay, high efficiency and strong anti-interference capability, so that the communication quality of the air conditioner driver and the central control unit VCU is optimized to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted air conditioners, and in particular to a vehicle-mounted air conditioner system based on millimeter wave isolation communication. Background Art

[0002] Traditional fuel vehicles use the engine to directly transfer kinetic energy to the air-conditioning compressor to drive the air-conditioning compressor; while the air-conditioning compressor of new energy vehicles is driven by the battery in the car. The following steps are required for the power battery to drive the compressor of new energy vehicles: first, the direct current must be converted into alternating current through inversion, and then the frequency of the alternating current must be adjusted so that it can stably drive the motor in the compressor. The functional components of this part exist in the vehicle as an air-conditioning drive unit. However, high voltage, inversion, frequency conversion, and motors are often accompanied by interference, and the interference caused is very likely to increase the number of error frames between the air-conditioning driver and the central control unit VCU, poor communication, and even direct damage to the CAN transceiver on the control board.

[0003] In the prior art, the air conditioning system of new energy vehicles inevitably needs to use CAN bus for communication to achieve isolation due to the above-mentioned particularities. However, using only CAN bus communication isolation method still cannot perfectly isolate the interference brought by the air conditioning driver to the central control unit VCU. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a vehicle air-conditioning system based on millimeter wave isolation communication, which can better and more stably isolate the interference brought by the air-conditioning driver to the central control unit VCU, and at the same time has the advantages of fast isolation transmission speed, small delay and high efficiency.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A vehicle air-conditioning system based on millimeter wave isolation communication includes an air-conditioning driver, a millimeter wave isolation module, a central control unit VCU and a vehicle bus; one end of the millimeter wave isolation module is connected to the central control unit VCU through a vehicle bus, and the other end of the millimeter wave isolation module is connected to the air-conditioning driver through another vehicle bus.

[0007] Optionally, the millimeter wave isolation module includes a millimeter wave transmitting mechanism and a millimeter wave receiving mechanism connected via millimeter wave wireless; the millimeter wave transmitting mechanism is connected to the central control unit VCU via the one vehicle bus; and the millimeter wave receiving mechanism is connected to the air-conditioning driver via the other vehicle bus.

[0008] Optionally, the millimeter wave isolation module is a full-duplex millimeter wave isolation module.

[0009] Optionally, the full-duplex millimeter wave isolation module includes a first millimeter wave transmitting mechanism, a first millimeter wave receiving mechanism, a second millimeter wave transmitting mechanism and a second millimeter wave receiving mechanism; the first millimeter wave transmitting mechanism and the second millimeter wave receiving mechanism are respectively connected to the central control unit VCU through the first vehicle bus; the first millimeter wave receiving mechanism and the second millimeter wave transmitting mechanism are respectively connected to the air-conditioning driver through the other vehicle bus.

[0010] Optionally, the millimeter wave isolation module is a millimeter wave isolation chip.

[0011] Optionally, the vehicle bus is a CAN bus, a LIN bus, a FlexRay bus or a MOST bus.

[0012] Optionally, a battery and an air-conditioning compressor are also included; the battery and the air-conditioning compressor are respectively connected to the air-conditioning driver.

[0013] Optionally, an evaporation temperature sensor is also included; the evaporation temperature sensor is connected to the central control unit VCU.

[0014] Optionally, a pressure switch is also included; the pressure switch is connected to the central control unit VCU.

[0015] Optionally, it also includes an air conditioning control panel; the air conditioning control panel is connected to the central control unit VCU.

[0016] The beneficial effect of the utility model is that it provides a new isolation solution for vehicle air-conditioning systems. The new isolation solution uses a millimeter wave isolation module in conjunction with the vehicle bus to achieve isolated communication transmission between the air-conditioning driver and the central control unit VCU. By introducing the millimeter wave isolation module, it can not only significantly improve the safety and reliability of the isolated communication, but also effectively isolate the interference caused by the air-conditioning driver to the central control unit VCU; and based on the characteristics of the millimeter wave isolation module with fast transmission speed, small delay, high efficiency and strong anti-interference ability, it will also optimize the communication quality between the air-conditioning driver and the central control unit VCU to a certain extent; further, based on the millimeter wave isolation module, it also has the advantages of small size, no need for external connectors, connecting wires and support for integrated single chip, so the new isolation solution also has the characteristics of simple circuit structure, easy design and low-cost competitive advantage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall framework of a vehicle air conditioning system based on millimeter wave isolation communication provided in the first embodiment of the utility model;

[0018] Figure 2A schematic diagram of the overall structural connection of a vehicle air conditioning system based on millimeter wave isolation communication provided in the first embodiment of the utility model;

[0019] Figure 3 This is a structural schematic diagram of a simplex transceiver millimeter wave isolation module in a vehicle air conditioning system provided in Embodiment 2 of the present utility model;

[0020] Figure 4 This is a structural schematic diagram of a full-duplex transceiver millimeter wave isolation module in a vehicle air-conditioning system provided in Embodiment 2 of the utility model.

[0021] Description of labels:

[0022] 1. Central control unit VCU; 2. Millimeter wave isolation module; 3. Air conditioning driver; 4. Vehicle bus;

[0023] 5. Battery; 6. Air conditioning compressor;

[0024] 7. Evaporation temperature sensor; 8. Pressure switch; 9. Air conditioning control panel;

[0025] 21. Millimeter wave transmitting mechanism; 22. Millimeter wave receiving mechanism;

[0026] 23. A first millimeter wave transmitting mechanism; 24. A first millimeter wave receiving mechanism; 25. A second millimeter wave transmitting mechanism; 26. A second millimeter wave receiving mechanism. DETAILED DESCRIPTION

[0027] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0028] The most critical concept of the utility model is to introduce a millimeter wave isolation module between the air-conditioning driver and the central control unit VCU, which significantly improves the safety and reliability of isolated communication and optimizes the communication quality to a certain extent.

[0029] Please refer to Figure 1 and Figure 2 , Embodiment 1 of the present utility model is:

[0030] like Figure 1 As shown, the present embodiment provides a vehicle air-conditioning system based on millimeter wave isolation communication, which includes an air-conditioning driver 3, a millimeter wave isolation module 2, a central control unit VCU 1 and two vehicle buses 4; one end of the millimeter wave isolation module 2 is connected to the central control unit VCU 1 through a vehicle bus 4, and the other end of the millimeter wave isolation module 2 is connected to the air-conditioning driver 3 through another vehicle bus 4.

[0031] It can be understood that this embodiment adds a millimeter wave isolation module on the basis of the original bus isolation solution to better isolate the high and low voltage crosstalk problem between the air conditioner driver and the central control unit VCU. In addition, the millimeter wave isolation module also has the characteristics of fast transmission speed, small delay, high efficiency and strong anti-interference ability, so it will also optimize the communication quality between the air conditioner driver and the central control unit VCU to a certain extent; in particular, the short-distance transmission method using millimeter waves as the carrier will be able to reach a bandwidth of 1Mbps to 10Gbps.

[0032] In some specific implementations of this embodiment, the vehicle bus may be a CAN bus, a LIN bus, a FlexRay bus or a MOST bus. Here, the vehicle bus used to connect the millimeter wave isolation module and the central control unit VCU, and the vehicle bus used to connect the millimeter wave isolation module and the air conditioner driver may use the same type of bus, or different types of buses may be used respectively. Therefore, it is more flexible and can better meet user needs.

[0033] In some specific implementations of this embodiment, Figure 2 As shown, one side of the air-conditioning driver 3 in the vehicle air-conditioning system, i.e., the high-voltage side, also includes a battery 5 and an air-conditioning compressor 6; the battery 5 and the air-conditioning compressor 6 are respectively connected to the air-conditioning driver 3. The battery 5 is used to provide direct current; the air-conditioning compressor 6 is used to drive the air-conditioning refrigeration.

[0034] Here, the working principle of the high-voltage side of the vehicle air-conditioning system described in this embodiment is: the DC power output by the battery is first converted into AC power through the air-conditioning driver, and then the AC power frequency is adjusted accordingly according to the control signal of the central control unit VCU, so as to be output to the air-conditioning compressor to control the action of its driver, thereby realizing the temperature control in the car.

[0035] In some specific implementations of this embodiment, Figure 2 As shown, the central control unit VCU 1 side in the vehicle air-conditioning system, i.e., the low-pressure side, also includes an evaporation temperature sensor 7, which is connected to the central control unit VCU 1. The evaporation temperature sensor 7 is used to sense and obtain the inlet and outlet evaporation temperature of the air-conditioning compressor, which is one of the air-conditioning working state information, and send the measured compressor inlet and outlet evaporation temperature information to the central control unit VCU as reference information for the central control VCU to make air-conditioning control decisions.

[0036] Furthermore, if Figure 2As shown, the central control unit VCU 1 side in the vehicle air conditioning system, i.e., the low-pressure side, also includes a pressure switch 8; the pressure switch 8 is connected to the central control unit VCU 1. The pressure switch 8 is used to obtain the air conditioning compressor pressure information, which is one of the air conditioning working state information, and send it to the central control unit VCU as reference information for the central control VCU to make air conditioning control decisions.

[0037] Furthermore, if Figure 2 As shown, the central control unit VCU 1 side in the vehicle air conditioning system, i.e., the low-pressure side, also includes an air conditioning control panel 9; the air conditioning control panel 9 is connected to the central control unit VCU 1. The air conditioning control panel 9 is used to receive the user's air conditioning control instructions and send them to the central control unit VCU. The air conditioning control instructions include an air conditioning on / off instruction, an air conditioning temperature adjustment control instruction, an air conditioning mode switching instruction, etc.

[0038] Here, the working principle of the low-pressure side of the vehicle air-conditioning system described in this embodiment is: the central control unit VCU receives the air-conditioning working status information, and the air-conditioning working status information includes but is not limited to the compressor inlet and outlet evaporation temperature information, the air-conditioning compressor pressure information, etc.; the central control unit VCU determines whether it is necessary to control the air-conditioning compressor based on the received air-conditioning working status information, and if necessary, it sends an air-conditioning control signal; the central control unit VCU will also receive air-conditioning control instructions from the air-conditioning control panel, and send corresponding air-conditioning control signals after processing; the air-conditioning control signal sent by the central control unit VCU will reach the millimeter wave isolation module through the vehicle bus, and be isolated and transmitted to the air-conditioning driver via the millimeter wave isolation module.

[0039] Therefore, the complete working principle of the vehicle air conditioning system based on millimeter wave isolation communication in this embodiment is as follows:

[0040] On the high-voltage side, the DC power output by the battery is first inverted into AC power through the air-conditioning driver, and then the AC power frequency is adjusted, and then output to the air-conditioning compressor to control the action of its driver. On the low-voltage side, the central control unit VCU receives the air-conditioning working status information in real time, which includes but is not limited to the compressor inlet and outlet evaporation temperature information, air-conditioning compressor pressure information, etc.; the central control unit VCU determines whether it is necessary to control the air-conditioning compressor based on the received air-conditioning working status information, and if necessary, it sends out an air-conditioning control signal; at the same time, the central control unit VCU will also determine in real time whether it has received the air-conditioning control command from the air-conditioning control panel, and if so, it will send out the corresponding air-conditioning control signal after processing; the air-conditioning control signal sent by the central control unit VCU will reach the millimeter wave isolation module through the vehicle bus, and will be isolated and transmitted to the air-conditioning driver through the millimeter wave isolation module; the air-conditioning driver will control the vehicle air-conditioning based on the received air-conditioning control signal. For example, the air-conditioning driver controls the driver action of the air-conditioning compressor by controlling the frequency of the AC power according to the air-conditioning control signal corresponding to temperature control, thereby achieving temperature control inside the car; the air-conditioning driver controls the switch of the vehicle air-conditioning by controlling the "air-conditioning relay" of the 12V power supply circuit according to the air-conditioning control signal corresponding to turning the air-conditioning on / off (i.e. the on-off control signal of the high-voltage circuit switch).

[0041] Please refer to Figure 3 and Figure 4 , Embodiment 2 of the present utility model is:

[0042] This embodiment is based on the above-mentioned embodiment 1, and provides a vehicle air conditioning system based on millimeter wave isolation communication, mainly expanding the introduced millimeter wave isolation module. Below, two specific implementation methods will be discussed in detail.

[0043] As a specific implementation of this embodiment, the millimeter wave isolation module in the vehicle air-conditioning system can be a "one-transmit-one-receive" simplex transceiver millimeter wave isolation module.

[0044] like Figure 3 As shown, the simplex transceiver millimeter wave isolation module specifically includes: a millimeter wave sending mechanism 21 and a millimeter wave receiving mechanism 22 connected via millimeter wave wireless; the millimeter wave sending mechanism 21 is connected to the central control unit VCU 1 via a vehicle bus 4; the millimeter wave receiving mechanism 22 is connected to the air conditioner driver 3 via another vehicle bus 4.

[0045] That is, in the above specific implementation, the central control unit VCU of the vehicle air-conditioning system serves as a transmitting end, and the air-conditioning driver serves as a receiving end.

[0046] Therefore, the working principle of the above specific implementation is: after the central control unit VCU sends out the corresponding air conditioning control signal according to the received air conditioning working status information or the air conditioning control command from the air conditioning control panel; the air conditioning control signal sent by the central control unit VCU will reach the millimeter wave sending mechanism of the millimeter wave isolation module through the vehicle bus, and then be sent out through the millimeter wave sending mechanism; the air conditioning control signal will be received by the millimeter wave receiving mechanism of the millimeter wave isolation module in the form of millimeter wave wireless transmission, and then reach the air conditioning driver through the vehicle bus, so as to effectively isolate the high and low voltage crosstalk signals. The air conditioning driver will control the vehicle air conditioning accordingly according to the received air conditioning control signal.

[0047] As another specific implementation of this embodiment, the millimeter wave isolation module in the vehicle air-conditioning system can be a full-duplex transceiver millimeter wave isolation module with "bidirectional transmission and reception".

[0048] like Figure 4 As shown, the full-duplex transceiver millimeter wave isolation module specifically includes: a first millimeter wave sending mechanism 23, a first millimeter wave receiving mechanism 24, a second millimeter wave sending mechanism 26 and a second millimeter wave receiving mechanism 25; the first millimeter wave sending mechanism 23 and the second millimeter wave receiving mechanism 25 are respectively connected to the central control unit VCU 1 through the one vehicle bus 4; the first millimeter wave receiving mechanism 24 and the second millimeter wave sending mechanism 26 are respectively connected to the air-conditioning driver 3 through the other vehicle bus 4.

[0049] That is, in the above specific implementation, the central control unit VCU of the vehicle air-conditioning system can be used as both a transmitting end and a receiving end; similarly, the air-conditioning driver can also be used as both a receiving end and a transmitting end.

[0050] Therefore, the working principle of the above specific implementation is:

[0051] (1) The first millimeter wave transmitting mechanism and the first millimeter wave receiving mechanism correspond to the communication path from the central control unit VCU to the air conditioner driver.

[0052] After the central control unit VCU sends out the corresponding air conditioning control signal based on the received air conditioning working status information or the air conditioning control command from the air conditioning control panel; the air conditioning control signal will reach the first millimeter wave transmitting mechanism of the millimeter wave isolation module through the vehicle bus, and then be sent out through the first millimeter wave transmitting mechanism; the air conditioning control signal will be received by the first millimeter wave receiving mechanism in the form of millimeter wave wireless transmission, and then reach the air conditioning driver through the vehicle bus, thereby effectively isolating the crosstalk signal brought by the high-voltage side. The air conditioning driver will control the vehicle air conditioning accordingly based on the received air conditioning control signal.

[0053] (2) The second millimeter wave transmitting mechanism and the second millimeter wave receiving mechanism correspond to the communication path from the air conditioner driver to the central control unit VCU.

[0054] The air conditioner driver can send feedback information including but not limited to: control result information, battery power information, compressor working status information, etc. to the second millimeter wave transmission mechanism of the millimeter wave isolation module, and send it out through the second millimeter wave transmission mechanism; the feedback information will be received by the second millimeter wave receiving mechanism in the form of millimeter wave wireless transmission, and then reach the central control unit VCU through the vehicle bus, so as to realize the information feedback from the low-voltage side to the high-voltage side. The central control unit VCU can grasp the air-conditioning related information based on the received feedback information, which can be displayed to the user to realize function expansion and assist in making air-conditioning control decisions.

[0055] It should be particularly noted that, regardless of whether it is the vehicle air-conditioning system provided in the first embodiment or the vehicle air-conditioning system provided in the second embodiment, the millimeter wave isolation module therein can be implemented using a millimeter wave isolation chip.

[0056] The millimeter wave isolation chip is used as an isolation communication chip in the vehicle air conditioning system provided by the utility model. It does not require external connectors and connecting wires; the millimeter wave carrier antenna is small; more importantly, the contactless chip embedded antenna transmission also has the characteristics of isolation, safety and reliability. Furthermore, the integrated single-chip solution can make the peripheral circuit simple, with fewer components, more convenient to design, and can use standard CMOS technology and standard packaging technology, with low-cost competitive advantages.

[0057] In summary, the vehicle air conditioning system based on millimeter wave isolation communication provided by the utility model can ensure the maximum effective isolation of crosstalk between high and low voltage ends by introducing a millimeter wave isolation module as a safety isolation circuit between the central control unit VCU and the air conditioning driver, and then cooperate with the communication isolation function of the vehicle bus, so as to significantly improve the safety and reliability of the isolated communication between the central control unit VCU and the air conditioning driver. In addition, the millimeter wave isolation module also has the characteristics of fast transmission speed, small delay, high efficiency and strong anti-interference ability, and will also optimize the communication quality between the air conditioning driver and the central control unit VCU to a certain extent; further, the millimeter wave isolation module integrated single chip solution can also make the isolation circuit structure simple, easy to design and have the characteristics of low cost competitive advantage.

[0058] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A vehicle air conditioning system based on millimeter wave isolation communication, characterized in that: It includes an air conditioner driver, a millimeter wave isolation module, a central control unit VCU and a car bus; one end of the millimeter wave isolation module is connected to the central control unit VCU through a car bus, and the other end of the millimeter wave isolation module is connected to the air conditioner driver through another car bus; The millimeter wave isolation module includes a millimeter wave transmitting mechanism and a millimeter wave receiving mechanism connected via millimeter wave wireless; the millimeter wave transmitting mechanism is connected to the central control unit VCU via the one vehicle bus; the millimeter wave receiving mechanism is connected to the air conditioner driver via the other vehicle bus.

2. The vehicle air conditioning system based on millimeter wave isolation communication as claimed in claim 1, characterized in that: The millimeter wave isolation module is a full-duplex millimeter wave isolation module; the full-duplex millimeter wave isolation module includes a first millimeter wave sending mechanism, a first millimeter wave receiving mechanism, a second millimeter wave sending mechanism and a second millimeter wave receiving mechanism; the first millimeter wave sending mechanism and the second millimeter wave receiving mechanism are respectively connected to the central control unit VCU through the first vehicle bus; the first millimeter wave receiving mechanism and the second millimeter wave sending mechanism are respectively connected to the air-conditioning driver through the other vehicle bus.

3. The vehicle air conditioning system based on millimeter wave isolation communication as claimed in claim 1, characterized in that: The millimeter wave isolation module is a millimeter wave isolation chip.

4. The vehicle air conditioning system based on millimeter wave isolation communication as claimed in claim 1, characterized in that: The automobile bus is a CAN bus, a LIN bus, a FlexRay bus or a MOST bus.

5. The vehicle air conditioning system based on millimeter wave isolation communication as claimed in claim 1, characterized in that: It also includes a battery and an air-conditioning compressor; the battery and the air-conditioning compressor are respectively connected to the air-conditioning driver.

6. The vehicle air conditioning system based on millimeter wave isolation communication as claimed in claim 1, characterized in that: It also includes an evaporation temperature sensor; the evaporation temperature sensor is connected to the central control unit VCU.

7. The vehicle air conditioning system based on millimeter wave isolation communication as claimed in claim 1, characterized in that: It also includes a pressure switch; the pressure switch is connected to the central control unit VCU.

8. The vehicle air conditioning system based on millimeter wave isolation communication as claimed in claim 1, characterized in that: It also includes an air conditioning control panel; the air conditioning control panel is connected to the central control unit VCU.

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