Electric defrosting control system for vehicle and electric bus

Abstract

The utility model belongs to electric motor car technical field provides a kind of vehicle electric defrosting control system and electric motor car, control system includes VCU controller, defrosting fan control circuit and defrosting heating control circuit;Defrosting fan control circuit, including defrosting fan switch, resistance and motor, defrosting fan switch includes one wind fan switch and two wind fan switches, when one wind fan switch is closed, resistance, motor and low voltage power supply conduction;When two wind fan switches are closed, motor is directly connected with low voltage power supply conduction;Defrosting heating control circuit includes main high voltage contactor, branch high voltage contactor, one PTC and two PTC, when main high voltage contactor is closed, one PTC and high voltage power supply conduction;When main high voltage contactor and branch high voltage contactor are closed, one PTC and two PTC parallel connection and high voltage power supply conduction.The utility model can realize the free combination between the gear of wind speed and heating power, realize accurate temperature control and energy efficiency optimization.

Description

Technical Field

[0001] This utility model relates to the field of electric bus technology, specifically to a vehicle electric defrosting control system and an electric bus. Background Technology

[0002] In winter, frost forms on car windows due to temperature differences, severely affecting the driver's visibility and increasing driving risks. Frost on car windshields in winter causes significant inconvenience and trouble for drivers. Currently, there are three main methods for defrosting: in-vehicle heating defrosting systems, electric heating glass defrosting systems with resistance wires, and using anti-fog sprays and anti-fog films.

[0003] Currently, the defrosting system in pure electric buses mainly uses onboard heating defrosting, with the speed adjusted via a control panel knob. The fan speed and PTC heating power are fixedly matched (low-speed fan corresponds to low-power PTC, high-speed fan corresponds to high-power PTC), preventing flexible combinations between speeds. This design means that when the fan is running at high speed and generating significant noise, the comfortable combination mode of "low fan speed + high-power heating" cannot be selected, impacting passenger experience. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a vehicle electric defrosting control system and an electric bus, which solves the problem that the current electric defrosting system of pure electric buses cannot freely combine fan speed and heating speed.

[0005] In a first aspect, the present invention provides a vehicle electric defrosting control system, comprising:

[0006] VCU controller;

[0007] A defrosting fan control circuit includes a defrosting fan switch, a resistor, and a motor. The defrosting fan switch includes a first-speed fan switch and a second-speed fan switch. When the first-speed fan switch is closed, the resistor and the motor are connected to the low-voltage power supply. When the second-speed fan switch is closed, the motor is directly connected to the low-voltage power supply.

[0008] The defrosting heating control circuit includes a main high-voltage contactor, a branch high-voltage contactor, a first-stage PTC, and a second-stage PTC. The main high-voltage contactor and the branch high-voltage contactor are both controlled by the VCU controller. When the main high-voltage contactor is closed, the first-stage PTC is connected to the high-voltage power supply. When the main high-voltage contactor and the branch high-voltage contactor are closed, the first-stage PTC and the second-stage PTC are connected in parallel to the high-voltage power supply.

[0009] As can be seen from the above technical solution, the vehicle electric defrosting control system provided by this utility model realizes two-speed adjustment of the fan based on the defrosting fan control circuit, and realizes two-speed adjustment of PTC heating power based on the defrosting heating control circuit. The speed and heating power levels can be freely combined to achieve precise temperature control and energy efficiency optimization.

[0010] Optionally, it also includes a heating switch circuit, which includes a diode and a defrost heating switch. The positive terminal of the diode is connected to the first-speed fan switch, the negative terminal of the diode is connected to the second-speed fan switch, one end of the defrost heating switch is connected to the negative terminal of the diode, and the other end is connected to the VCU controller.

[0011] Optionally, the heating switch circuit is further provided with a temperature control protection switch, which is located between the defrosting heating switch and the VCU controller.

[0012] Optionally, the defrost fan control circuit further includes a defrost fan relay, which is controlled by the VCU controller to switch on and off; the normally closed contact of the defrost fan switch and the defrost fan relay are connected, and the normally open contact of the defrost fan relay is connected to the low-voltage power supply.

[0013] Optionally, the defrost fan switch is a double-position rocker switch.

[0014] Optionally, the defrosting heating control circuit further includes a defrosting heating reset switch, which is connected to the VCU controller.

[0015] Optionally, the defrosting heating control circuit further includes a first-level heating indicator light and a second-level heating indicator light. When the main high-voltage contactor is closed, the first-level heating indicator light is lit; when the main high-voltage contactor and the branch high-voltage contactor are closed, the second-level heating indicator light is lit.

[0016] Secondly, the present invention provides an electric bus, including a vehicle electric defrosting control system of any possible implementation of the first aspect.

[0017] By adopting the above technical solution, this application has the following technical effects:

[0018] The vehicle electric defrosting control system provided by this utility model realizes two-speed adjustment of the fan based on the defrosting fan control circuit and two-speed adjustment of the PTC heating power based on the defrosting heating control circuit. Compared with the current setting method of low-speed fan corresponding to low-power PTC and high-speed fan corresponding to high-power PTC, this utility model realizes the free combination between the speed and heating power levels, achieving precise temperature control and energy efficiency optimization. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 This is a schematic diagram of an automotive electric defrosting control system provided in an embodiment of the present invention.

[0021] Figure label:

[0022] 1-VCU controller; 2-Defrosting fan switch; 21-First-gear fan switch; 22-Second-gear fan switch; 3-Resistor; 4-Motor; 5-Main high-voltage contactor; 6-Second-gear high-voltage contactor; 7-First-gear PTC; 8-Second-gear PTC; 9-Diode; 10-Defrosting heating switch; 11-Temperature control protection switch; 12-Defrosting fan relay; 13-Defrosting heating reset switch; 14-First-gear heating indicator light; 15-Second-gear heating indicator light. Detailed Implementation

[0023] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0024] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0025] Example 1

[0026] like Figure 1 As shown, a vehicle electric defrosting control system is provided, including a VCU controller 1, a defrosting fan control circuit, and a defrosting heating control circuit. The defrosting fan control circuit includes a defrosting fan switch 2, a resistor 3, and a motor 4. The defrosting fan switch 2 includes a first-speed fan switch 21 and a second-speed fan switch 22. When the first-speed fan switch 21 is closed, the resistor 3 and the motor 4 are connected to the low-voltage power supply; when the second-speed fan switch 22 is closed, the motor 4 is directly connected to the low-voltage power supply. The defrosting heating control circuit includes a main high-voltage contactor 5, a branch high-voltage contactor 6, a first-speed PTC 7, and a second-speed PTC 8. The main high-voltage contactor 5 and the branch high-voltage contactor 6 are both controlled by the VCU controller 1. When the main high-voltage contactor 5 is closed, the first-speed PTC 7 is connected to the high-voltage power supply; when the main high-voltage contactor 5 and the branch high-voltage contactor 6 are closed, the first-speed PTC 7 and the second-speed PTC 8 are connected in parallel to the high-voltage power supply.

[0027] The defrost fan control circuit enables two-speed adjustment of the fan, and the defrost heating control circuit enables two-speed adjustment of the PTC heating power. The speed and heating power settings can be freely combined to achieve precise temperature control and energy efficiency optimization.

[0028] Specifically, the defrost fan switch 2 is controlled by the operator and is a double-position rocker switch. For example... Figure 1 As shown, when the driver or passenger closes the first-speed fan switch 21 via the rocker switch, the low-voltage power supply 24V+, resistor R, and motor 4 are connected; when the driver or passenger closes the second-speed fan switch 22 via the rocker switch, the low-voltage power supply 24V+ and motor 4 are directly connected. In this embodiment, the fan speed adjustment of the two speeds is achieved by controlling whether resistor 3 is connected; when resistor 3 is connected, the current decreases, and motor 4 will operate at low power, at which point the fan speed is lower.

[0029] Optionally, a heating switch circuit is also included. This circuit includes a diode 9 and a defrost heating switch 10. The positive terminal of diode 9 is connected to a first-speed fan switch 21, and the negative terminal is connected to a second-speed fan switch 22. One end of the defrost heating switch 10 is connected to the negative terminal of diode 9, and the other end is connected to the VCU controller 1. Regardless of whether the fan speed is at first or second speed, when the defrost heating switch 10 is closed by the operator, the VCU controller 1 will receive a first-speed heating signal. The VCU controller 1 then controls the main high-voltage contactor 5 to close, allowing the first-speed PTC 7 to operate.

[0030] In one embodiment, the heating switch circuit is further provided with a temperature control protection switch 11, which is located between the defrost heating switch 2 and the VCU controller 1.

[0031] Optionally, the defrost fan control circuit also includes a defrost fan relay 12, which is controlled by the VCU controller 1. The normally closed contacts of the defrost fan switch 2 and the defrost fan relay 12 are connected, and the normally open contacts of the defrost fan relay 12 are connected to the low-voltage power supply. When the defrost heating function is turned off, the defrost fan switch 2 is opened, and the fan will stop working immediately under normal circumstances. However, by adding the defrost fan relay 12, the VCU controller 1 can also keep the fan running by controlling the defrost fan relay 12 to ensure that residual heat is fully dissipated. When the temperature drops to a certain level, the defrost fan relay 12 is then opened.

[0032] It should be understood that those skilled in the art can implement, for example, the VCU controller to control the corresponding contactor or relay based on the acquired electrical signal, using existing technology, which will not be elaborated here.

[0033] like Figure 1As shown, the defrosting heating control circuit also includes a defrosting heating reset switch 13, which is connected to the VCU controller 1. When the defrosting heating switch 10 is closed, if the defrosting heating reset switch 13 is pressed, the VCU controller 1 receives a second-level heating signal and controls the high-voltage contactor 6 to close, causing the second-level PTC8 to also operate. At this time, the first-level PTC7 and the second-level PTC8 will operate simultaneously.

[0034] like Figure 1 As shown, the defrosting heating control circuit also includes a first-level heating indicator light 14 and a second-level heating indicator light 15. One end of the first-level heating indicator light 14 is connected to the control terminal of the VCU controller 1 for the main high-voltage contactor 5, and the other end is connected to 24V+. When the main high-voltage contactor 5 is closed, the first-level heating indicator light 14 illuminates. The second-level heating indicator light 15 is connected to the control terminal of the VCU controller 1 for the secondary high-voltage contactor 6. When both the main high-voltage contactor 5 and the secondary high-voltage contactor 6 are closed, the second-level heating indicator light 15 illuminates.

[0035] Example 2

[0036] An electric bus is provided, including the vehicle electric defrosting control system provided in Embodiment 1. The electric bus provided in this embodiment adopts the same inventive concept as the above-mentioned vehicle electric defrosting control system and can achieve the same beneficial effects, which will not be described again here.

[0037] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A vehicle electric defrosting control system, characterized in that, include: VCU controller; A defrosting fan control circuit includes a defrosting fan switch, a resistor, and a motor. The defrosting fan switch includes a first-speed fan switch and a second-speed fan switch. When the first-speed fan switch is closed, the resistor and the motor are connected to the low-voltage power supply. When the second-speed fan switch is closed, the motor is directly connected to the low-voltage power supply. The defrosting heating control circuit includes a main high-voltage contactor, a branch high-voltage contactor, a first-stage PTC and a second-stage PTC. The main high-voltage contactor and the branch high-voltage contactor are both controlled by the VCU controller. When the main high-voltage contactor is closed, the first-stage PTC is connected to the high-voltage power supply. When the main high-voltage contactor and the branch high-voltage contactor are closed, the first-stage PTC and the second-stage PTC are connected in parallel to conduct the high-voltage power supply.

2. The vehicle electric defrosting control system according to claim 1, characterized in that, It also includes a heating switch circuit, which includes a diode and a defrost heating switch. The positive terminal of the diode is connected to the first-speed fan switch, and the negative terminal of the diode is connected to the second-speed fan switch. One end of the defrost heating switch is connected to the negative terminal of the diode, and the other end is connected to the VCU controller.

3. The vehicle electric defrosting control system according to claim 2, characterized in that, The heating switch circuit is also equipped with a temperature control protection switch, which is located between the defrosting heating switch and the VCU controller.

4. The vehicle electric defrosting control system according to claim 2, characterized in that, The defrost fan control circuit also includes a defrost fan relay, which is controlled by the VCU controller to switch on and off; the defrost fan switch and the normally closed contact of the defrost fan relay are connected, and the normally open contact of the defrost fan relay is connected to the low-voltage power supply.

5. The vehicle electric defrosting control system according to claim 4, characterized in that, The defrost fan switch is a double-position rocker switch.

6. The vehicle electric defrosting control system according to claim 2, characterized in that, The defrosting heating control circuit also includes a defrosting heating reset switch, which is connected to the VCU controller.

7. The vehicle electric defrosting control system according to claim 6, characterized in that, The defrosting heating control circuit also includes a first-level heating indicator light and a second-level heating indicator light. When the main high-voltage contactor is closed, the first-level heating indicator light is lit; when the main high-voltage contactor and the branch high-voltage contactor are closed, the second-level heating indicator light is lit.

8. An electric bus, characterized in that, Includes the vehicle electric defrosting control system as described in any one of claims 1-7.

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