KR20210001470A - Air heating system for an electric vehicle - Google Patents

Abstract

The present invention relates to a heating and air conditioning system for an electric vehicle and, more specifically, to a heating and air conditioning system for an electric vehicle, which can be easily applied to an electric vehicle which is converted from an engine-driven vehicle into a motor-driven vehicle by an electric vehicle conversion kit, and can provide stable heating. The heating and air conditioning system for an electric vehicle according to the present invention is a heating and air conditioning system for an electric vehicle for heating outside air sucked from the electric vehicle converted from the engine-driven vehicle to be driven by the motor and blowing the heated outside air into the vehicle. The heating and air conditioning system for an electric vehicle comprises: a hot water tank for storing hot water; a heater for heating the hot water accommodated in the hot water tank; a heat exchanger for heat exchange between air and the hot water flowing into and discharged from the inside; a circulation pump mounted on a pipe connected so that the hot water discharged from the hot water tank flows into the heat exchanger and returns to the hot water tank, and circulating the hot water; a blower provided to suck air from the outside of the vehicle and blow the air through the heat exchanger into the inside of the vehicle; a control unit for controlling the operation of the heater, the circulation pump and the blower; and a power supply unit for supplying power for the operation of the heater, the circulation pump and the blower, and the operation of the control unit.

Description

Electric vehicle heating and air conditioning system {AIR HEATING SYSTEM FOR AN ELECTRIC VEHICLE}

The present invention relates to a heating and air conditioning system for an electric vehicle, and more particularly, the electric vehicle conversion kit can be easily applied to an electric vehicle in which an engine-driven vehicle is converted into a motor-driven vehicle, as well as stable heating. It relates to a heating and air conditioning system for electric vehicles.

In general, internal combustion engines, including gasoline engines, which are widely used as engines for automobiles, burn fuel in cylinders, and use heat energy generated at this time as power. In such an internal combustion engine, the exhaust gas discharged after combustion contains harmful components such as nitrogen oxides caused by combustion and carbon monoxide and hydrocarbons caused by incomplete combustion, thereby polluting the atmosphere.

Due to such environmental pollution problems and depletion of fossil fuels, research on automobile engines using alternative energy such as solar heat or electricity is being conducted more actively in various countries around the world.

Among the engines for automobiles using alternative energy, an electric vehicle in which a vehicle is driven using electric energy is most likely to be put into practical use.

For this reason, it is possible to reuse many existing parts or devices such as the chassis, transmission, and suspension of the existing vehicle, which has potential as well as realistic advantages in terms of environment and economics. Attempts are being made to convert them into automobiles.

However, conventional engine-driven vehicles use heat generated from the engine to increase the temperature of the outside air introduced through the air intake duct and blow them into the vehicle interior using a blower.In the case of an electric vehicle, engine heat cannot be used. Therefore, Korean Utility Model Registration No. 20-0161598 (Electric Vehicle Heating System, 1999.09.02), Korean Registration Patent No. 10-1416416 (Electric Vehicle Heating System, 2014.07.01), and Korean Registered Patent No. 10-1869494 As in (Electric Vehicle Heating System, 2018.06.14), a method of additionally installing and using a separate auxiliary heat source is being used.

However, the heating device of the electric vehicle has a limitation in applying it to an electric vehicle manufactured by remodeling an existing engine-driven vehicle, and it is difficult to heat it to an appropriate temperature.

Republic of Korea Utility Model No. 20-0161598 (1999.09.02): Electric vehicle heating system Korean Patent Registration No. 10-1416416 (2014.07.01): Heating system for electric vehicles Republic of Korea Patent Registration No. 10-1869494 (2018.06.14): Heating device for electric vehicle

The present invention has been conceived by recognizing the above points, and an object of the present invention is that the electric vehicle conversion kit can be easily applied to an electric vehicle in which an engine-driven vehicle is converted into a motor-driven vehicle, as well as stable heating. It is to provide a heating and air conditioning system for electric vehicles.

In order to achieve the above object, the heating and air conditioning system for an electric vehicle according to the present invention is a heating and air conditioning system for an electric vehicle to heat the outside air sucked in from an electric vehicle that has been converted to be driven by a motor and blow it into the vehicle. In the system, a hot water tank in which hot water is stored, a heater for heating hot water accommodated in the hot water tank, a heat exchanger for heat exchange between hot water and air introduced and discharged, from the hot water tank A circulation pump that is installed on a pipe connected so that the discharged hot water flows into the heat exchanger and returns to the hot water tank to circulate the hot water, and a circulation pump that sucks air from the outside of the vehicle and blows it into the vehicle through the heat exchanger. A blower, a control unit for controlling the operation of the heater, the circulation pump and the blower, and a power supply unit for supplying power for the operation of the heater, the circulation pump and the blower and the operation of the control unit are provided. .

In addition, in the heating and air conditioning system for an electric vehicle according to the present invention, the controller controls the circulation pump to be driven when the temperature of the hot water in the hot water tank is within a predetermined range.

In addition, in the heating and air conditioning system for an electric vehicle according to the present invention, the control unit includes a water temperature sensor for sensing the temperature of the hot water tank, and a water temperature detected by the water temperature sensor by being connected in series with a ignition switch and a heating switch. If it is within a range, a pump intermittent relay is provided that is connected and regulates the supply of power from the power supply to the circulation pump, and the vacuum so that the circulation pump is driven when the temperature of the hot water in the hot water tank is within a certain range. It is characterized in that the control unit is operated.

In addition, in the heating and air conditioning system for an electric vehicle according to the present invention, the control unit controls the heater to be operated when the hot water in the hot water tank is less than a certain level.

In addition, in the heating system for an electric vehicle according to the present invention, power supplied from the power supply to the heater is high voltage power supplied from a high voltage battery, and the power supplied from the power supply to the circulation pump and blower is supplied from an auxiliary battery. It is characterized in that it is low voltage power or low voltage power output by converting a high voltage of a high voltage battery.

With the configuration as described above, the heating and air conditioning system for an electric vehicle according to the present invention can be easily applied to an electric vehicle in which an engine-driven vehicle is converted into a motor-driven vehicle by an electric vehicle conversion kit, as well as stable heating. It has the advantage of being able to.

1A and 1B are a front and rear view of a state in which an electric vehicle conversion kit is coupled to a body frame in order to convert an engine-driven vehicle into an electric vehicle in an electric vehicle to which a heating and air conditioning system for an electric vehicle according to an embodiment of the present invention is applied. A perspective view showing each
2 is a diagram illustrating a state in which an electric vehicle conversion kit for converting an engine-driven vehicle into an electric vehicle in an electric vehicle to which a heating and air conditioning system for an electric vehicle according to an embodiment of the present invention is applied is viewed from a front view of a coupling relationship with a vehicle body frame. Exploded perspective view
3 is a block diagram showing the configuration of a heating and air conditioning system for an electric vehicle according to an embodiment of the present invention

Hereinafter, a heating and air conditioning system for an electric vehicle according to the present invention will be described in more detail with reference to the drawings and examples.

1A and 1B are a front and rear view of a state in which an electric vehicle conversion kit is coupled to a vehicle body frame in order to convert an engine-driven vehicle into an electric vehicle in an electric vehicle to which a heating and air conditioning system for an electric vehicle according to an embodiment of the present invention is applied. Is a perspective view showing each, and Figure 2 is an electric vehicle conversion kit for converting an engine-driven vehicle into an electric vehicle in an electric vehicle to which the heating and air conditioning system for an electric vehicle according to an embodiment of the present invention is applied, showing a coupling relationship with the body frame It is an exploded perspective view showing a state viewed from above, and FIG. 3 is a block diagram showing the configuration of a heating and air conditioning system for an electric vehicle according to an embodiment of the present invention.

The heating and air conditioning system for an electric vehicle according to the present invention removes the engine and other accessory parts from the engine-driven vehicle, and is converted by installing an electric vehicle conversion kit equipped with a drive motor to replace the removed configuration on the engine-driven vehicle. It characterized in that it is configured to easily configure the heating and air conditioning system.

1A and 1B are perspective views illustrating a state in which an electric vehicle conversion kit for converting an engine-driven vehicle into an electric vehicle in an electric vehicle to which a heating and air conditioning system for an electric vehicle according to an embodiment of the present invention is applied is coupled to a vehicle body frame. , FIG. 2 is an exploded perspective view showing a coupling relationship between an electric vehicle conversion kit for converting an engine-driven vehicle into an electric vehicle and a vehicle body frame.

Referring to the drawings, an electric vehicle to which the heating and air conditioning system for an electric vehicle according to the present invention is applied is configured by converting an engine-driven vehicle into an electric vehicle using an electric vehicle conversion kit, and the engine-driven vehicle, which is the target vehicle, adopts a frame structure. It is a vehicle. That is, in an engine-driven vehicle converted into an electric vehicle to which the present invention is applied, a vehicle such as a truck, a small bus, or a van in which a cab (not shown in the drawing) is mounted on the body frame 1 corresponding to the skeleton. This corresponds to a vehicle in which a body shell (not shown in the drawing) is mounted on the body frame 1 as described above.

Referring to the drawing, in the vehicle to be applied, two rows of main beams 1a are arranged side by side in the front-rear direction, and a plurality of horizontal frames 1b, 1c, 1d, 1e, 1f, 1g are interposed between the main beams 1a. ), the body frame 1 formed by connecting the main beams 1a to each other is provided, and the front wheels 2a and the rear wheels 2b are attached to the body frame 1 through an axle suspension. It is connected, and the engine (not shown in the drawing) is mounted in the space between the cab or the body shell and the body frame 1, and the front wheel 2a or the front wheel 2a through the transmission and the drive shaft 3 It is configured to drive the rear wheels 2b.

In the drawing, an engine room is formed in the front part of the body frame 1, and the drive shaft 3 connected to the engine installed in the space extends to the rear to drive the rear wheels 2b. An embodiment in which an engine-driven vehicle of a driving type is converted into an electric vehicle using an electric vehicle conversion kit for converting an engine-driven vehicle according to the present invention into an electric vehicle is illustrated. A pair of engine mounting portions 1a' are provided on the main beam 1a at positions facing each other in a portion where a space for mounting the engine is formed, and the plurality of horizontal frames 1b, 1c, 1d,1e,1f,1g), a transmission mounting part (1c') for mounting a transmission integrally combined with the engine at the central position of the horizontal frame 1c located in the part where the space for the engine is formed Is equipped.

Referring to the drawings, an electric vehicle conversion kit for converting an engine driven vehicle into an electric vehicle includes a motor assembly 10, a pump assembly 20, a power supply and control assembly 30, a brake vacuum pump assembly 40, and a heater assembly ( 50) and a battery assembly 60 are included. In particular, the motor assembly 10, the pump assembly 20, the power supply and control assembly 30, and the brake vacuum pump assembly 40 are integrated through a plurality of brackets and are configured to be mounted in the engine mounting space where the engine is removed. It is characterized. 3 illustrates in detail a configuration in which the motor assembly 10, the pump assembly 20, the power supply and control assembly 30, and the brake vacuum pump assembly 40 are integrally coupled as described above.

As described above, the pump assembly 20, the power supply and control assembly 30, and the brake vacuum pump assembly 40 are integrally coupled to the motor assembly 10. That is, the pump assembly 20 is located in front of the motor assembly 10 and is integrally coupled with the motor assembly 10, and the power supply and control assembly 30 is an upper portion of the motor assembly 10 The brake vacuum pump assembly 40 is positioned at the motor assembly 10 and integrally coupled to the motor assembly 10, and the brake vacuum pump assembly 40 is positioned at a side of the motor assembly 10 to be integrally coupled with the motor assembly 10.

The motor assembly 10 is provided with a drive motor for replacing the engine of an existing engine-driven vehicle, and is configured to transmit the output of the drive motor to the drive shaft 3 connected to the rear wheel 2b of the vehicle.

The pump assembly 20 is an accessory system for operating an air conditioner compressor for indoor air conditioning of the vehicle and a steering pump for forming hydraulic pressure of the power steering system by using an accessory motor separate from the driving motor for driving the vehicle. It is a configuration for integration.

The power supply and control assembly 30 is a mounted slow speed for controlling the supply of power to the driving motor and other accessory parts of the motor assembly 10 and charging and discharging power to the battery of the battery assembly 60 to be described later. An On-Board Charger (OBC), a Low DC-DC Converter (LDC), and a Power Distribution Unit (PDU) are integrated.

The brake vacuum pump assembly 40 is a component for supplying a vacuum pressure to a vacuum type brake booster for increasing an operating force of a brake. The brake vacuum pump assembly 40 has a structure in which a vacuum tank in which a vacuum pressure is formed and a vacuum pump for pumping air to form a vacuum in the vacuum tank are integrally formed.

The heater assembly 50 includes a hot water tank 51 and a heater 52 for heating and supplying water in the heating and air conditioning system for an electric vehicle according to an embodiment of the present invention, so that the vehicle body frame 1 ). The heater assembly 50 includes a hot water tank 51 containing heated hot water and a heater 52 for heating the hot water inside the hot water tank 51. The heater assembly 50 configured as described above is located in front of the motor assembly 10 and is coupled to and mounted on the vehicle body frame 1.

The battery assembly 60 is configured in a state in which a plurality of batteries are fixed to the mounting frame, positioned at the rear of the motor assembly 10, and coupled to the vehicle body frame 1 of the vehicle.

3 is a block diagram showing a heating and air conditioning system for an electric vehicle according to an embodiment of the present invention.

Referring to FIG. 3, the heating and air conditioning system for an electric vehicle according to an embodiment of the present invention heats water in an electric vehicle converted to drive an engine-driven vehicle with a motor, and heats the sucked outside air while circulating the heated water. As a system for blowing air into the vehicle interior, a hot water tank 51, a heater 52, a circulation pump 54, a blower 55, a heat exchanger 56, a control unit 53, 57, 58, and a power supply unit ( 30,60) are provided and configured.

The hot water tank 51 is configured to contain water (hot water) therein. The hot water contained in the hot water tank 51 is heated by the heater 52 and returned through the heat exchanger 56 by driving the circulation pump 54.

The heater 52 is a component for heating hot water accommodated in the hot water tank 51. Electric heat is generated by receiving power from the power supply units 30 and 60 of the heater 52.

The heat exchanger 56 is configured to cool hot water and heat air while heat exchange is performed between hot water and air. That is, the heat exchanger 56 exchanges heat between hot water introduced and discharged from the inside by the drive of the circulation pump 54 and the air sucked from the outside of the vehicle by the blower 55 and blown into the vehicle. Let this happen.

The circulation pump 54 is mounted on a pipe connected so that the hot water discharged from the hot water tank 51 flows into the heat exchanger 56 and returns to the hot water tank 51 to pump and circulate hot water. Configuration.

The blower 55 is configured to suck air from the outside of the vehicle and blow the air through the heat exchanger 56 to be blown into the vehicle. Referring to the drawings, a duct D is provided in the vehicle for blowing air by the blower 55, and the blower 55 sucks air through the inlet of the duct D and blows it to the outlet. The heat exchanger 56 is positioned on the passage of the duct D, and accordingly, the air blown by the blower 55 passes through the heat exchanger 56 and is heated by heat exchange with hot water.

The controllers 53, 57 and 58 are configured to control the operation of the heater 52, the circulation pump 54, and the blower 55.

In particular, the controllers 53, 57, 58 control the circulation pump 54 to be driven when the temperature of the hot water in the hot water tank 51 is within a certain range, and the hot water in the hot water tank 51 is less than a certain range. In this case, the heater 52 is controlled to be operated. The controllers 53, 57 and 58 are configured with a water temperature sensor 53, a pump intermittent relay 57, and a heater intermittent relay 58.

The water temperature sensor 53 senses the temperature of the hot water tank 51 and generates an electric signal according to the sensed temperature. The pump intermittent relay 57 and the heater intermittent relay 58 are intercepted according to the water temperature sensed by the water temperature sensor 53.

The pump intermittent relay 57 is configured to control the driving of the circulation pump 54 according to the water temperature sensed by the water temperature sensor 53. Referring to the drawing, the pump intermittent relay 57 is connected in series with the start switch K and the heating switch Hs, and the water temperature sensed by the water temperature sensor 53 is within a certain range, for example, water temperature. It is connected when the temperature of is between 60 and 80 degrees. Accordingly, the water temperature sensed by the water temperature sensor 53 is 60 to 80 when the user turns on the vehicle's ignition switch (K) and turns on the heating switch (Hs) for heating. In the case of between degrees, while the pump intermittent relay 57 is connected, power is supplied from the power supply units 30 and 60 to the circulation pump 54 to drive the circulation pump 54, and accordingly, the hot water becomes hot water. It circulates between the heat exchanger 56 in the tank 51. In addition, although the vehicle's ignition switch (K) is turned on (ON) and the heating switch (Hs) for heating is turned on (ON), the water temperature sensed by the water temperature sensor 53 is lower than 60 degrees or 80 degrees. If it is higher than the degree, the pump intermittent relay 57 is short-circuited, and the power supply from the power supply units 30 and 60 to the circulation pump 54 is cut off.

The heater intermittent relay 58 is configured to intercept the power supplied to the heater 52 according to the temperature of the water temperature. That is, when the water temperature sensed by the water temperature sensor 53 is higher than a certain temperature, for example, the water temperature is higher than 80 degrees, the heater intermittent relay 58 is short-circuited, and the heater ( 52), the power supply is cut off. Conversely, when the water temperature sensed by the water temperature sensor 53 is 80 degrees or less, the heater intermittent relay 58 is connected and power is supplied from the power supply units 30 and 60 to the heater 52 so that the hot water tank ( At 51), hot water is heated.

The power supply units 30 and 60 are configured for supplying electric power for the operation of the heater 52, the circulation pump 54, and the blower 55 and the operation of the control unit. In the present invention, the power supply units 30 and 60 are configured by the power supply and control assembly 30 and the battery assembly 60 described above.

On the other hand, the battery assembly 60 is mainly composed of a 300V high voltage battery for supplying power to a driving motor for driving a vehicle, the power of the high voltage battery is 12V by the power supply and control assembly 30. It is converted to low voltage power and supplied to other accessory parts.

The heating and air conditioning system for an electric vehicle according to the present invention is configured to supply high voltage power to the heater 52 for rapid heating of hot water, and to supply low voltage power to the circulation pump 54 and the blower 54 To do.

To this end, the power supplied from the power supply units 30 and 60 to the heater 52 is configured to supply high voltage power of 300V from the high voltage battery. In addition, in the heating and air conditioning system for an electric vehicle according to the present invention, the 12V low voltage power supplied from the auxiliary battery (not shown in the drawing) or the high voltage of the high voltage battery is converted to a DC converter (LDC, Low Voltage DC-DC Converter) is configured to supply the low voltage power output by converting to 12V to the circulation pump 54 and the blower 54.

The heating and air conditioning system for an electric vehicle described above and illustrated in the drawings is only one embodiment for carrying out the present invention, and should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is determined only by the matters described in the following claims, and the improved and modified embodiments without departing from the gist of the present invention will be apparent to those of ordinary skill in the technical field to which the present invention belongs. As long as it will be said to belong to the protection scope of the present invention.

1 body frame
1a main beam
1a' engine mounting part
1b,1c,1d,1e,1f,1g horizontal frame
1c' mission mounting part
2a, 2b front wheel, rear wheel
3 drive shaft
10 motor assembly
30 power supply and control assembly
40 brake vacuum pump assembly
50 heater assembly
51 Hot water tank
52 heater
53 Water temperature sensor
54 Circulation pump
55 blower
56 Heat Exchanger
57 Pump Isolation Relay
58 Heater Isolation Relay
60 battery assembly

Claims (5)

In the heating and air conditioning system for an electric vehicle for heating the outside air sucked from the electric vehicle converted to be driven by a motor and blowing it into the vehicle,
A hot water tank in which hot water is stored,
A heater for heating the hot water accommodated in the hot water tank,
A heat exchanger for heat exchange between the hot water flowing into and discharged from the air, and
A circulation pump installed on a pipe connected so that the hot water discharged from the hot water tank flows into the heat exchanger and returns to the hot water tank to circulate the hot water;
A blower provided to suck air from the outside of the vehicle and blow it into the vehicle through the heat exchanger;
A control unit for controlling the operation of the heater, the circulation pump and the blower,
A heating and air conditioning system for an electric vehicle, characterized in that provided with a power supply for supplying power for the operation of the heater, the circulation pump and the blower and the operation of the control unit. The method of claim 1,
The control unit controls the circulation pump to be driven when the temperature of the hot water in the hot water tank is within a predetermined range. The method of claim 2,
The control unit is connected in series with a water temperature sensor for sensing the temperature of the hot water tank, a start switch and a heating switch, and is connected when the water temperature detected by the water temperature sensor is within a certain range, and is connected from the power supply to the circulation pump. It is configured to be provided with a pump intermittent relay that regulates the supply of power,
When the temperature of the hot water in the hot water tank is within a certain range, the vacuum control unit is operated to drive the circulation pump. The method according to any one of claims 1 to 3,
The controller is a heating system for an electric vehicle, characterized in that for controlling the heater to operate when the hot water in the hot water tank is less than a certain level. The method of claim 4,
Power supplied from the power supply to the heater is high voltage power supplied from a high voltage battery,
The electric power supplied from the power supply to the circulation pump and the blower is low voltage power supplied from an auxiliary battery or low voltage power output by converting a high voltage of a high voltage battery.

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