Compressed air system control structure of new energy vehicle

Abstract

The utility model belongs to a new energy vehicle compressed air system control structure in the technical field of new energy vehicles. The air processing unit (2) comprises an air inlet (21) and an unloading valve (22), the air inlet (21) is connected with the air compressor (1), the unloading valve (22) is provided with a pressure switch (3), the pressure switch (3) is connected with a control component (5), and the control component (5) is connected with the air compressor (1). The control structure of the compressed air system of the new energy vehicle is simple in structure, capable of conveniently achieving start-stop control of the air compressor and further achieving control of air supply pressure, safe and reliable in control and low in manufacturing and maintenance cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of new energy vehicles, and more specifically, relates to a control structure for a compressed air system of a new energy vehicle. Background Art

[0002] With the continuous development of new energy vehicles, the application of electric air compressors in commercial vehicles is becoming more and more common. At present, most vehicles equipped with electric air compressors on the market are matched with electronic control dryers, and the start and stop of the electric air compressor are controlled by the high and low level signals output by the electronic control dryer. However, for the existing electronic control dryers on the market, because the component body integrates an electronic control unit, on the one hand, the procurement cost is high, and on the other hand, the component performance varies, and the electronic control dryer often fails due to water ingress, ablation, etc. of the electronic control unit, resulting in the inability of the air compressor to work properly. While increasing the vehicle manufacturing cost, it seriously affects the vehicle operation safety. There is an improvement need.

[0003] There is a technology with the name "Method for Controlling a Compressed Air System, Compressed Air System and Vehicle" and the publication number "CN107148377A" in the prior art. This technology relates to a method for controlling a compressed air system (1) of a motor vehicle, wherein a piston compressor (2) is driven by a motor (6) of the motor vehicle, the delivery state of the piston compressor (2) is adjusted by a delivery regulating device (7), the delivery regulating device (7) is controlled by a compressor control module (8), compressed air is generated in a compressed air reservoir (5) by the piston compressor (2) during a filling phase, wherein at least one measurement parameter is measured by at least one sensor (11), and then the at least one measurement parameter is compared with a configured predetermined threshold value, and when the threshold value is exceeded or fallen below, the delivery rate of the compressed air is reduced by adjusting the piston compressor (2). In addition, the present invention relates to a compressed air system (1) for implementing the method and a vehicle having such a compressed air system (1). This technology does not involve the technical problems and technical solutions of this application. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is: aiming at the deficiencies of the prior art, to provide a control structure for a compressed air system of a new energy vehicle with a simple structure, which can conveniently realize the start and stop control of the air compressor, and further realize the control of the air supply pressure, with safe and reliable control, and low manufacturing and maintenance costs.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the utility model is as follows:

[0006] The utility model relates to a control structure of a compressed air system for a new energy vehicle. The air treatment unit includes an air inlet and a relief valve. The air inlet is connected to an air compressor, and a pressure switch is installed at the relief valve part. The pressure switch is connected to a control component, and the control component is connected to the air compressor.

[0007] The air treatment unit includes a plurality of air supply ports, and the air supply ports are connected to air pipelines. The air pipelines include a driving circuit air path I, a driving circuit air path II, a parking system air path, and an auxiliary air pipeline.

[0008] The pressure switch is a normally open switch.

[0009] The air compressor is an electric air compressor.

[0010] The control component is a vehicle control unit.

[0011] The relief valve includes a relief channel, and an opening and closing valve and a spring are installed in the relief channel. The opening and closing valve is close to the inside of the relief valve, and the spring is close to the outside of the relief valve.

[0012] When the supply air pressure of the compressed air system of the new energy vehicle does not reach the set relief pressure of the air treatment unit, the relief valve is set to a structure that can be in a closed state.

[0013] When the supply air pressure of the compressed air system of the new energy vehicle is higher than the set relief pressure of the air treatment unit, the relief valve is set to a structure that can be in an open state and pushes the pressure switch into a closed state.

[0014] When the pressure switch turns into a closed state, the control component is set to a structure that can control the air compressor to stop working.

[0015] Adopting the technical solution of the utility model, the working principle and beneficial effects are as follows:

[0016] The control structure of the compressed air system for new energy vehicles described in the present utility model is provided with an air treatment unit, which is an integrated structure of a mechanical dryer + multi-gas circuit. The air inlet is connected to the air compressor, and is used for the gas generated when the air compressor works to enter the air treatment unit. The unloading valve is used for unloading when the pressure exceeds the set pressure. A pressure switch is installed at the unloading valve part, so that when unloading, the pressure switch is controlled to change from the normally open state to the closed state. Then, according to the state signal of the pressure switch received by the control component, the control component controls the air compressor to stop working. The above structure proposes an improved technical solution for the deficiencies in the prior art. The working principle and process are specifically as follows: The air compressor is an electric air compressor, and the air compressor does not have a control unit. Its start and stop need to be controlled by an external device. The external device used is the control component, and the control component is the vehicle control unit (VCU). The control component is used to receive and judge the vehicle's air filling and air using requirements, and to control the start and stop actions of the air compressor in real time; the air treatment unit is an integrated structure of a mechanical dryer + multi-gas circuit. When the air compressor starts and works normally, the gas generated by the air compressor enters the air treatment unit from the air inlet, and then is distributed to each air using pipeline. When the system pressure does not reach the unloading pressure of the air treatment unit, the unloading valve of the air treatment unit is closed, the pressure switch is in the off state, and the air compressor fills air normally. When the system pressure reaches the unloading pressure of the air treatment unit, the unloading valve of the air treatment unit is ventilated, pushing the pressure switch to close, the circuit of the pressure switch is connected, and a connection signal is fed back to the control component. After receiving the connection signal, the control component controls the air compressor to stop. As the vehicle uses air and consumes it, when the system pressure drops to the return closing pressure of the air treatment unit, the pressure of the unloading valve is emptied, the pressure switch is disconnected again, and the control component controls the air compressor to start filling air again. In this way, the cycle is repeated to reliably ensure that the air pressure in the vehicle air circuit is sufficient, and at the same time avoid the waste caused by the continuous operation of the air compressor, achieving energy conservation and consumption reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following briefly describes the content expressed by each drawing in this specification and the marks in the drawings:

[0018] Figure 1 It is a schematic structural diagram of the control structure of the compressed air system for new energy vehicles described in the present utility model;

[0019] The marks in the drawings are respectively: 1, air compressor; 2, air treatment unit; 21, air inlet; 22, unloading valve; 23, air supply port; 3, pressure switch; 4, air using pipeline; 41, driving circuit air path I; 42, driving circuit air path II; 43, parking system air path; 44, auxiliary air using pipeline; 5, control component. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following is a further detailed description of the specific implementation manners of the present utility model, such as the shapes, structures of various components involved, the mutual positions and connection relationships between various parts, the functions and working principles of various parts, etc., with reference to the accompanying drawings and through the description of embodiments:

[0021] As shown in the Figure 1 accompanying drawings, the present utility model is a control structure for a compressed air system of a new energy vehicle. The air treatment unit 2 includes an air inlet 21 and a relief valve 22. The air inlet 21 is connected to the air compressor 1. A pressure switch 3 is installed at the relief valve 22. The pressure switch 3 is connected to the control component 5, and the control component 5 is connected to the air compressor 1. For the deficiencies in the prior art, the above structure proposes an improved technical solution. When setting up the structure, an air treatment unit 2 is provided. The air treatment unit 2 is an integrated structure of a mechanical dryer + multi-gas circuit. The air inlet 21 is connected to the air compressor 1 and is used for the gas generated when the air compressor works to enter the air treatment unit. The relief valve 22 is used for unloading when the pressure exceeds the set pressure. A pressure switch 3 is installed at the relief valve 22, so that when unloading, the pressure switch 3 is controlled to change from the normally open state to the closed state. Then, according to the state signal of the pressure switch received, the control component 5 controls the air compressor 1 to stop working. For the deficiencies in the prior art, the above structure proposes an improved technical solution. Specifically, the working principle and process are as follows: The air compressor 1 is an electric air compressor. The air compressor 1 does not have a control unit, and its start and stop need to be controlled by an external device. The external device used is the control component 5, and the control component 5 is the vehicle control unit (VCU). The control component 5 is used to receive and judge the vehicle's air injection and air consumption requirements, and to control the start and stop actions of the air compressor 1 in real time. The air treatment unit is an integrated structure of a mechanical dryer + multi-gas circuit. When the air compressor 1 starts and works normally, the gas generated by the air compressor 1 enters the air treatment unit 2 from the air inlet 21, and then is distributed to each air-using pipeline 4. When the system pressure does not reach the unloading pressure of the relief valve 4 of the air treatment unit 2, the relief valve 4 of the air treatment unit 2 is closed, and the pressure switch 3 is in the off state, and the air compressor normally inflates. When the system pressure reaches the unloading pressure of the air treatment unit 2, the relief valve 4 of the air treatment unit 2 opens to ventilate, pushing the pressure switch 3 to close. The circuit of the pressure switch 3 is connected, and a connection signal is fed back to the control component. After receiving the connection signal, the control component 5 controls the air compressor 1 to stop. As the vehicle uses air and consumes it, when the system pressure drops to the return pressure of the relief valve 4 of the air treatment unit 2, the pressure of the relief valve 4 is emptied, the pressure switch 3 is no longer stressed and disconnects again, and the control component 5 controls the air compressor 1 to start inflating again. In this way, the cycle is repeated to ensure that the vehicle air circuit pressure is sufficient, and at the same time, the waste caused by the continuous operation of the air compressor is avoided, realizing energy conservation and consumption reduction. The control structure for the compressed air system of the new energy vehicle described in the present utility model has a simple structure, can conveniently realize the start and stop control of the air compressor, and further realize the control of the supply air pressure. The control is safe and reliable, and the manufacturing and maintenance costs are low.

[0022] The described air handling unit 2 includes a plurality of air supply ports 23, and the air supply ports 23 are connected to an air pipe 4. The air pipe 4 includes a traveling circuit air path I 41, a traveling circuit air path II 42, a parking system air path 43, and an auxiliary air pipe 44. With the above structure, through the air handling unit, gas can be sent into different air pipes. And the air pipe can also be other air pipes.

[0023] The described pressure switch 3 is a normally open switch. With the above structure, the pressure switch 3 is of the normally open type (normally in the off state), and is installed at the outlet position of the unloading valve 4. Before the system inflates to reach the set air pressure (i.e., before reaching the unloading pressure of the air handling unit), the unloading valve is in the closed state, and there is no gas inlet or outlet in the unloading valve 4. As the actual pressure of the system rises and reaches the unloading pressure of the air handling unit 2, the pressure pushes the unloading valve to open, and the unloading valve is ventilated. The pressure switch 3 actually plays a role of feeding back on-off signals to the control component.

[0024] The described air compressor 1 is an electric air compressor. With the above structure, it is convenient for the control component to control the on-off of the circuit of the air compressor 1 to realize the start-stop control of the air compressor, and the start-stop control is simple and reliable.

[0025] The described control component is a vehicle control unit. With the above structure, there is no need to set up a separate control component, but directly use the vehicle control unit, which does not affect the control and reduces costs.

[0026] The described unloading valve 4 includes an unloading channel, and an opening and closing valve and a spring are installed in the unloading channel. The opening and closing valve is close to the inside of the unloading valve 4, and the spring is close to the outside of the unloading valve 4. With the above structure, before the system inflates to reach the set air pressure (i.e., before reaching the unloading pressure of the air handling unit), under the action of the spring, the spring pushes the opening and closing valve to be in the closed state. After the system inflates to reach the set air pressure, the gas pressure pushes the opening and closing valve to squeeze the spring. At this time, a channel is formed between the opening and closing valve and the unloading channel, and the gas passes through the channel to realize the passage of the gas. And after the pressure in the air handling unit decreases, the spring resets and squeezes the opening and closing valve, and the opening and closing valve closes the unloading channel again. One end of the opening and closing valve close to the inside of the unloading valve is a conical structure, one end of the spring close to the outside of the unloading valve is provided with a spring limit step, and one end of the unloading channel close to the inside of the unloading valve is a conical structure to cooperate with the structure of the opening and closing valve, which not only meets the closing requirement but also meets the ventilation requirement.

[0027] When the air supply pressure of the compressed air system of the new energy vehicle does not reach the set unloading pressure of the air handling unit, the unloading valve 22 is set to a structure that can be in the closed state.

[0028] When the supply air pressure of the compressed air system of the new energy vehicle described above is higher than the set unloading pressure of the air treatment unit, the unloading valve 22 is configured to be able to be in an open state and push the pressure switch 3 into a closed state. When the pressure switch 3 is turned into a closed state, the control component 5 is configured to be able to control the air compressor 1 to stop working. With the above structure, according to the pressure condition, the gas on-off of the unloading valve is controlled. And according to the gas on-off of the unloading valve, the disconnection and closing of the pressure switch are realized. Then, according to the feedback signal of the pressure switch to the control component, the control component controls the start and stop of the air compressor according to the feedback signal, which is convenient and reliable to control.

[0029] For the control structure of the compressed air system of the new energy vehicle described in the present utility model, the air compressor 1 is an electric air compressor. The air compressor 1 does not have a control unit, and its start and stop need to be controlled by an external device. The external device used is the control component 5, and the control component 5 is the vehicle control unit (VCU). The control component 5 is used to receive and judge the vehicle's air filling and air using requirements, and control the start and stop actions of the air compressor 1 in real time. The air treatment unit is an integrated structure of a mechanical dryer + multi-gas circuit. When the air compressor 1 starts and works normally, the gas generated by the air compressor 1 enters the air treatment unit 2 from the air inlet 21, and then is distributed to each air using pipeline 4. When the system pressure does not reach the unloading pressure of the unloading valve 4 of the air treatment unit 2, the unloading valve 4 of the air treatment unit 2 is closed, and the pressure switch 3 is in an open state, and the air compressor normally fills air. When the system pressure reaches the unloading pressure of the air treatment unit 2, the unloading valve 4 of the air treatment unit 2 opens to ventilate, pushing the pressure switch 3 to close. The circuit of the pressure switch 3 is connected, and a connection signal is fed back to the control component. After receiving the connection signal, the control component 5 controls the air compressor 1 to stop. As the vehicle uses air and consumes it, when the system pressure drops to the return closing pressure of the unloading valve 4 of the air treatment unit 2, the pressure of the unloading valve 4 is emptied, the pressure switch 3 is no longer stressed and disconnects again. The control component 5 controls the air compressor 1 to start filling air again. In this way, the cycle ensures that the air pressure of the vehicle air circuit is sufficient, and at the same time avoids the waste caused by the continuous operation of the air compressor, realizing energy saving and consumption reduction.

[0030] The above has made an exemplary description of the present utility model in conjunction with the drawings. Obviously, the specific implementation of the present utility model is not limited by the above methods. As long as various improvements are made by adopting the method concept and technical solution of the present utility model, or the concept and technical solution of the present utility model are directly applied to other occasions without improvement, they are all within the protection scope of the present utility model.

Claims

1. A new energy vehicle compressed air system control structure, characterized in that: The air handling unit (2) comprises an air inlet (21) and a relief valve (22); the air inlet (21) is connected to an air compressor (1); a pressure switch (3) is installed at the relief valve (22); the pressure switch (3) is connected to a control component (5); and the control component (5) is connected to the air compressor (1).

2. The new energy vehicle compressed air system control structure according to claim 1 is characterized in that: The air processing unit (2) comprises a plurality of air supply ports (23), the air supply ports (23) being connected to an air pipeline (4), and the air pipeline (4) comprising a driving circuit air circuit I (41), a driving circuit air circuit II (42), a parking system air circuit (43) and an auxiliary air pipeline (44).

3. The new energy vehicle compressed air system control structure according to claim 1 or 2, characterized in that: The pressure switch (3) is a normally open switch.

4. The new energy vehicle compressed air system control structure according to claim 1 or 2, characterized in that: The air compressor (1) is an electric air compressor.

5. The new energy vehicle compressed air system control structure according to claim 1 or 2, characterized in that: The control component is a vehicle control unit.

6. The new energy vehicle compressed air system control structure according to claim 1 or 2, characterized in that: The unloading valve comprises an unloading channel, in which an opening and closing valve and a spring are installed, wherein the opening and closing valve is close to the inside of the unloading valve, and the spring is close to the outside of the unloading valve.

7. The new energy vehicle compressed air system control structure according to claim 6 is characterized in that: When the air supply pressure of the compressed air system of the new energy vehicle does not reach the set air processing unit unloading pressure, the unloading valve (22) is configured to be in a closed state.

8. The new energy vehicle compressed air system control structure according to claim 7 is characterized in that: When the air supply pressure of the compressed air system of the new energy vehicle is higher than the set unloading pressure of the air processing unit, the unloading valve (22) is configured to be in an open state and to push the pressure switch (3) to a closed state.

9. The new energy vehicle compressed air system control structure according to claim 8, characterized in that: When the pressure switch (3) is switched to a closed state, the control component (5) is configured to be a structure capable of controlling the air compressor (1) to stop working.

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