Warm air control circuit of extended-range vehicle cab

Abstract

The utility model relates to the technical field of vehicle warm air control, and discloses a warm air control circuit of an extended-range vehicle cab, which is characterized in that a water cut-off valve is connected in a connecting branch of an engine minor cycle and a warm air water tank, and the water cut-off valve is normally closed; a heating area branch of the air conditioner controller is connected with the vehicle-mounted control unit, an air volume switch signal output end of the fan controller is integrally connected with the air conditioner controller, and the water-break valve relay is connected between the vehicle-mounted control unit and the water-break valve; when the air conditioner controller is controlled by the air conditioner knob to be connected with the heating area branch and receives an air volume switch turn-on signal, the air conditioner controller sends a water cut-off valve turn-on signal and an engine start signal to the vehicle-mounted control unit. The vehicle-mounted control unit receives the signal and then sends a water-break valve starting signal to control a water-break valve relay to act so as to open a water-break valve, and meanwhile an engine is controlled to start. According to the scheme, on-off of the water break valve can be controlled through the angle of the cab air conditioner panel knob, cab heating is provided, and switches special for opening the water break valve are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle heater control, in particular to a heater control circuit for a cab of an extended-range vehicle. Background Art

[0002] Range-Extended Electric Vehicles (REEVs) are typically equipped with a small internal combustion engine (such as a gasoline engine) as a range extender to provide additional electrical energy when the battery charge is low. In these vehicles, waste heat from the engine is used to heat the cabin. This heat is transferred through the engine cooling system to a heat exchanger, and then a blower blows the heated air into the cabin. This method improves heating efficiency, conserves battery power, and extends the vehicle's range, making it particularly useful in cold climates and for long-distance driving.

[0003] Prior art methods include adding an air conditioning shutoff valve to the vehicle's air conditioning circuit. This method uses engine operating parameters to accurately control the valve, obtaining engine operating parameters when the valve meets preset control conditions. However, this approach is intended to improve the vehicle's overall cooling performance. Even if it can be applied to improve heating performance, in practice, this method is cumbersome to control, and ultimately achieves overall vehicle cooling or heating performance slowly. This adjustment method is not suitable for extended-range vehicles with different operating modes or those requiring only rapid heating in the cab. Utility Model Content

[0004] The utility model aims to provide a heating control circuit for the cab of an extended-range vehicle, which can quickly utilize the waste heat of a generator to provide heating when the cab of the extended-range vehicle needs to be heated.

[0005] The basic solution provided by the utility model is: a range-extended vehicle cab heater control circuit, the control circuit including a branch connecting the engine small cycle and the heater water tank, an air conditioning controller, an on-board control unit, a fan controller, an air conditioning knob located in the vehicle cab and connected to the air conditioning controller for controlling the air conditioning controller to connect the heating zone, natural ventilation zone and cooling zone branches, a water shut-off valve and a water shut-off valve relay;

[0006] The water shut-off valve is connected to the branch connecting the engine small circulation and the heater water tank, wherein the water shut-off valve is in a normally closed state;

[0007] The heating zone branch of the air conditioning controller is connected to the vehicle control unit, and the air volume switch signal output end of the fan controller is integrated with the air conditioning controller. When the air conditioning controller is controlled by the air conditioning knob to turn on the heating zone branch and the air conditioning controller receives the air volume switch on signal, the air conditioning controller sends a water shut-off valve conduction and engine start signal to the vehicle control unit;

[0008] The water shut-off valve relay is connected between the vehicle-mounted control unit and the water shut-off valve, and is used to control the water shut-off valve relay to open the water shut-off valve and control the engine start after the vehicle-mounted control unit receives the water shut-off valve conduction and engine start signals and sends a water shut-off valve start signal.

[0009] The working principle and advantages of the utility model are: when there is a demand for heating inside the cab, the knob is rotated to the heating zone, and at the same time the air volume switch is turned on, the air conditioning controller sends a water shut-off valve conduction and engine start signal to the on-board control unit. After receiving the water shut-off valve conduction and engine start signal, the on-board control unit sends a water shut-off valve start signal to control the water shut-off valve relay to open the water shut-off valve, and at the same time control the engine to start. At this time, the heater water tank provides the heating function.

[0010] Compared with the existing technology, the cab heater control circuit of the extended-range vehicle in this scheme cleverly uses the engine waste heat specifically for supplying cab heating, so as to meet the needs of rapid cab heating and reasonable matching of heat energy exchange between waste heat and heating, avoiding the inability of engine waste heat to supply heating for the entire vehicle, resulting in ineffective utilization of engine waste heat; secondly, through this circuit, the on-off of the water shut-off valve can be controlled by the angle of the operating knob on the cab air-conditioning panel, directly realizing the heating function of the heater water tank, making the control of the cab heating demand more convenient and can be quickly met according to the driver's needs; by integrating the on-off signal of the water shut-off valve on the air-conditioning panel, the number of switches dedicated to opening the water shut-off valve is reduced, the modification of the cab panel is reduced, and the cost is reduced; at the same time, the waste heat of the engine is efficiently utilized during the operation of the extended-range vehicle. When the cab has a heating demand, the switch of the water shut-off valve is controlled, and after starting the engine, the battery can be charged and the cab can be heated at the same time, without consuming the battery power, thereby increasing the cruising range of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the structure of the extended-range vehicle cab heater control circuit provided by an embodiment of the present utility model;

[0012] Figure 2 A schematic diagram of the connection of the water shut-off valve in the state where the engine small cycle shares the engine water inlet interface provided by the embodiment of the present utility model;

[0013] Figure 3This is a connection diagram of the water shut-off valve under the separate interface of the engine small circulation provided by an embodiment of the utility model.

[0014] The symbols in the drawings of the specification include: engine 100, heater tank 200, air conditioning controller 300, vehicle control unit 400, fan controller 500, water shut-off valve 600, water shut-off valve relay 700, and blower 800. DETAILED DESCRIPTION

[0015] The following is a further detailed description through specific implementation methods:

[0016] The embodiment is basically as shown in the attached Figure 1 As shown: the extended-range vehicle cab heater control circuit, the control circuit includes a branch connecting the engine 100 and the heater water tank 200, an air-conditioning controller 300, an on-board control unit 400 (VCU), a fan controller 500 integrated with the air-conditioning controller 300, and an air-conditioning knob located in the vehicle cab and connected to the air-conditioning controller 300 for controlling the air-conditioning controller 300 to connect the heating zone, natural ventilation zone and cooling zone branches; a water shut-off valve 600 and a water shut-off valve relay 700; the water shut-off valve 600 model can be selected: nominal voltage: DV12V, working voltage: 9V≤U≤16V, waterproof grade: IP67 water shut-off valve 600, solenoid valve flow: ≥11L / min (can be selected according to needs), meeting the requirements of conventional extended-range heating operation circuits.

[0017] The water shutoff valve 600 is connected to a branch connecting the engine 100 and the heater water tank 200 , wherein the water shutoff valve 600 is in a normally closed state.

[0018] Specifically, the water shutoff valve 600 can be specifically set between the range-extended vehicle engine 100 and the heater water tank 200, which can be divided into a state where the engine 100 small cycle shares the engine 100 water inlet interface and a state where the engine 100 small cycle does not share the same position. Figure 2 As shown, when the engine 100 small cycle shares the engine 100 water inlet interface, the water cut-off valve 600 is installed on the small cycle water outlet branch. Figure 3 As shown, when the engine 100 has a separate small cycle interface, the water shutoff valve 600 can be installed in the small cycle water outlet branch ( Figure 3 (a)), can also be installed in the small circulation water inlet branch ( Figure 3 (as shown in (b)).

[0019] The water shut-off valve 600 is arranged at a position higher than the upper plane of the frame, that is, the actual installation position of the water shut-off valve 600 is not lower than the upper plane of the frame of the extended-range vehicle, and avoids the area directly exposed to water. The effect is that it is easy to install on the frame, the fixed structure strength of the water shut-off valve 600 is better, the waterproof effect is better, and it conforms to the space of the extended-range vehicle, the operation control effect, etc.

[0020] The water shutoff valve relay 700 is connected between the onboard control unit 400 and the water shutoff valve 600. Upon receiving the water shutoff valve 600 on and engine 100 start signals, the onboard control unit 400 transmits a water shutoff valve 600 start signal to control the water shutoff valve relay 700, thereby opening the water shutoff valve 600 and starting the engine 100. Specifically, pin 1 of the water shutoff valve relay 700 is connected to the IG power supply, and pin 2 is connected to the onboard control unit 400. When the signal output is active low, the normally open contact of the water shutoff valve relay 700 closes, energizing and opening the water shutoff valve 600. The water shutoff valve relay 700 can be mounted inside the vehicle's fuse box, i.e., within the vehicle's fuse box for easy maintenance. The air volume switch signal output end of the fan controller 500 (the fan common end in this embodiment) is connected to pin 4 of the air conditioning controller 300. When the air conditioning controller 300 is controlled by the air conditioning knob to connect the heating zone branch and the air conditioning controller 300 receives the air volume switch on signal, the water shut-off valve 600 is turned on and the engine 100 is started. The signal is sent to the vehicle control unit 400 through the air conditioning controller 300.

[0021] A branch circuit is added between the heating zone control branch of the air conditioning controller 300 and the onboard control unit 400, connected to indicator light 1. The other end of indicator light 1 is connected to the FS30 fuse. FS07 is connected to protect the water shutoff valve relay 700 circuit. FS29 is connected to the blower 800 to protect it from high current.

[0022] During specific use, the cab air conditioning knob is divided into heating zone, natural ventilation zone, and cooling zone. The knob rotation angle in the three partitions is 270° in total, which is divided into three sections. Rotating from left to right, 0-90° is the cooling zone, 90°-180° is the natural wind zone, and 180°-270° is the heating zone.

[0023] When there is a need for heating inside the cab, the knob is turned to the heating zone. At the same time, when the air volume switch is turned on, the air conditioning controller 300 sends a water shut-off valve 600 conduction and engine 100 start signal to the vehicle control unit 400 (VCU). After receiving the water shut-off valve 600 conduction and engine 100 start signal, the vehicle control unit 400 sends a water shut-off valve 600 start signal to control the water shut-off valve relay 700 to open the water shut-off valve 600 and control the engine 100 to start. At this time, the heater tank 200 provides the heating function.

[0024] When there is no need for heating inside the cab and the knob is rotated to the cooling zone and ventilation zone, the air-conditioning controller 300 sends a water shut-off valve 600 closing and engine 100 closing signal to the on-board control unit 400VCU. After receiving the water shut-off valve 600 closing and engine 100 closing signals, the on-board control unit 400 sends a water shut-off valve 600 closing signal to control the water shut-off valve relay 700 to operate to close the water shut-off valve 600, and at the same time control the engine 100 to shut down, and the heater water tank 200 does not provide heating function.

[0025] The extended-range vehicle cab heater control circuit provided in this embodiment cleverly uses the engine waste heat specifically for supplying cab heating, thereby meeting the needs of rapid cab heating and reasonable matching of heat energy exchange between waste heat and heating, avoiding the inability of the engine waste heat to supply heating for the entire vehicle, resulting in ineffective utilization of the engine waste heat; secondly, through this circuit, the on-off of the water shut-off valve can be controlled by the angle of the operating knob on the cab air-conditioning panel, directly realizing the heating function of the heater water tank, making the control of the cab heating demand more convenient and quickly meeting the driver's needs; by integrating the on-off signal of the water shut-off valve on the air-conditioning panel, the number of switches dedicated to opening the water shut-off valve is reduced, the modification of the cab panel is reduced, and the cost is reduced; at the same time, the waste heat of the engine is efficiently utilized during the operation of the extended-range vehicle model. When the cab has a heating demand, the switch of the water shut-off valve is controlled, and after starting the engine, the battery can be charged and the cab can be heated at the same time, without consuming the battery power, thereby increasing the cruising range of the entire vehicle.

[0026] The above description is merely an embodiment of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. A person of ordinary skill in the art is aware of all common technical knowledge in the technical field to which the utility model belongs before the application date or priority date, is able to obtain all existing technologies in the field, and has the ability to apply conventional experimental means before that date. A person of ordinary skill in the art can, under the guidance of this application, improve and implement the present scheme in combination with his or her own abilities. Some typical known structures or methods should not become an obstacle for a person of ordinary skill in the art to implement the present application. It should be pointed out that a person of ordinary skill in the art can make several variations and improvements without departing from the structure of the present invention. These should also be considered as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. The extended range vehicle cab heater control circuit is characterized by: The control circuit includes a branch connecting the engine small cycle and the heater water tank, an air conditioning controller, an onboard control unit, a fan controller, an air conditioning knob located in the vehicle cab and connected to the air conditioning controller for controlling the air conditioning controller to connect the heating zone, natural ventilation zone and cooling zone branches, a water shut-off valve and a water shut-off valve relay; The water shut-off valve is connected to the branch connecting the engine small circulation and the heater water tank, wherein the water shut-off valve is in a normally closed state; The heating zone branch of the air conditioning controller is connected to the vehicle control unit, and the air volume switch signal output end of the fan controller is integrated with the air conditioning controller. When the air conditioning controller is controlled by the air conditioning knob to turn on the heating zone branch and the air conditioning controller receives the air volume switch on signal, the air conditioning controller sends a water shut-off valve conduction and engine start signal to the vehicle control unit; The water shut-off valve relay is connected between the vehicle-mounted control unit and the water shut-off valve, and is used to control the water shut-off valve relay to open the water shut-off valve and control the engine start after the vehicle-mounted control unit receives the water shut-off valve conduction and engine start signals and sends a water shut-off valve start signal.

2. The extended-range vehicle cab heater control circuit according to claim 1, characterized in that: When the engine small cycle of the extended-range vehicle shares the engine water inlet interface, the water shut-off valve is installed on the small cycle water outlet branch.

3. The extended-range vehicle cab heater control circuit according to claim 1, characterized in that: When the engine small cycle of the range-extended vehicle has a separate interface, the water shut-off valve is installed on the small cycle water outlet branch or the small cycle water inlet branch.

4. The extended-range vehicle cab heater control circuit according to claim 1, characterized in that: The actual installation position of the water shut-off valve is not lower than the upper plane of the frame of the extended-range vehicle.

5. The extended-range vehicle cab heater control circuit according to claim 1, characterized in that: Pin 1 of the water shut-off valve relay is connected to the IG power, and pin 2 is connected to the vehicle control unit.

6. The extended-range vehicle cab heater control circuit according to claim 1, characterized in that: The actual installation position of the water shut-off valve relay is in the body fuse box of the range-extended vehicle.

Images