KR102004354B1 - Control method for driving electric compressor - Google Patents
Control method for driving electric compressor Download PDFInfo
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- KR102004354B1 KR102004354B1 KR1020140027088A KR20140027088A KR102004354B1 KR 102004354 B1 KR102004354 B1 KR 102004354B1 KR 1020140027088 A KR1020140027088 A KR 1020140027088A KR 20140027088 A KR20140027088 A KR 20140027088A KR 102004354 B1 KR102004354 B1 KR 102004354B1
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- Air-Conditioning For Vehicles (AREA)
Abstract
The target discharge temperature of the air conditioning system and the target rotational speed of the electric compressor are calculated based on the difference between the calorie required in the interior of the environmentally friendly car and the internal temperature measured in the current car room, Disclosed is an operation control method of an electric compressor capable of reducing power consumed by turning off the compressor and reducing fuel consumption when the target rotation speed is lower than the minimum rotation speed of the compressor.
The operation control method of the compressor includes calculating a target discharge temperature for the air conditioning system (S10), calculating a target rotation speed of the motor-driven compressor (10) based on the target discharge temperature calculated in the step S10 (S12), comparing the target discharge temperature calculated in the step S10 with the current temperature (S14), and if the target discharge temperature is lower than the current temperature in the car interior in the step S14, (S16) of comparing the target rotational speed of the electric compressor (10) with the minimum rotational speed required for driving the motor-driven compressor (10) And turning off the driving of the motor-driven compressor 10 (S18) if it is lower than the number of revolutions.
Description
More particularly, the present invention relates to a control method of an electric compressor, and more particularly, to a control method of an electric compressor, The target rotational speed of the compressor is calculated, and if the target temperature is lower than the current temperature and the target rotational speed is lower than the minimum rotational speed of the compressor, the electric power consumed by turning off the compressor is reduced, And a method of controlling the operation of the compressor.
In general, an internal combustion engine of an automobile that uses fossil fuel as a fuel, such as gasoline or diesel, pollutes the environment due to a variety of harmful components contained in the exhaust gas discharged into the atmosphere after the combustion of the fuel. And the generation of ozone causes respiratory diseases. In particular, since the amount of fossil fuels existing on the earth is limited, a new scheme for utilizing new alternative energy for depletion is required.
As a result, in the past, electric vehicles (EVs) that drive through motors driven by electric energy, hybrid electric vehicles (hybrid electric vehicles) that make use of hybrid energy sources such as engines and electric motors, Vehicle, HEV), and a fuel cell electric vehicle (FCEV) that drives an electric motor using electric power generated from a fuel cell to develop a variety of eco-friendly vehicles.
In this case, the electric vehicle is a low-pollution environment-friendly vehicle (hybrid vehicle) that can minimize the environmental problems and can solve the exhaustion problem of resources, or an environmentally friendly environment-friendly vehicle Fuel cell vehicle) includes an electric motor for driving a vehicle, a battery (high-voltage battery) as a storage means for supplying electric power to the electric motor, and an inverter for rotating the electric motor.
In the case of a fuel cell vehicle, a fuel cell hybrid system in which a storage means such as a battery is connected in parallel with a fuel cell, which is a main power source, as an auxiliary power source, and a supercapacitor in addition to a battery as an auxiliary power source, has been developed . The inverter plays a role of driving the motor by phase-converting the power supplied from the storage means (or the fuel cell) according to the control signal applied from the controller.
In addition, the electric vehicle is equipped with a converter for power conversion, for example, a low voltage DC-DC converter (LDC) for power conversion between a high voltage battery (main battery) and a low voltage battery do.
On the other hand, in spite of being an environment-friendly vehicle, an electric vehicle generates heat due to energy loss in various parts such as high-voltage parts, like a car of a general internal combustion engine. Therefore, a cooling device for cooling the electric vehicle is required. To provide the thermal comfort of the air conditioning and air conditioning equipment should be equipped.
For example, the cooling system and control method of an environmentally friendly vehicle disclosed in Korean Patent Publication No. 10-2012-0135537 minimizes unnecessary electric power consumption when cooling a vehicle in an environmentally friendly vehicle using an electric compressor for cooling the vehicle, A) a one-person boarding mode in which a controller confirms whether or not a passenger of a passenger seat is boarded from a signal of a passenger detecting unit during the operation of the cooling system and only the driver is boarded, and a control unit Determining which of the additional boarding modes the passenger is additionally boarding; b) controlling the position of the mode control door such that when the mode is the single passenger mode, the controller reduces the electric power supply amount of the electric compressor and the air conditioning blower to a predetermined value as compared with the additional boarding mode and simultaneously the cold air is supplied only to the driver's seat .
However, the cooling system of the environmentally friendly vehicle as described above determines the boarding mode in accordance with the number of passengers. In the case of the one-boarding mode, the supply of electric power is reduced compared to the additional boarding mode, It is necessary to take measures to improve the energy use efficiency more fundamentally.
Accordingly, control of an electric compressor used in an environmentally friendly automobile is implemented by calculating the target evaporator temperature and then increasing or decreasing the RPM of the electric compressor until the temperature of the evaporator approaches the target temperature , The temperature of the evaporator may not rise to the target temperature even if the RPM is controlled to a minimum in order to drive the compressor under specific conditions.
For example, when the electric compressor is driven at a minimum number of revolutions, when the actual evaporator temperature is lower than the target temperature of the set evaporator, the opening amount of the air temperature door (TEMP DOOR) The discharge temperature was controlled by allowing low temperature air to pass through the heater core.
Further, in an air conditioning system using a heat pump which can selectively perform cooling and heating by switching the direction of flow of the refrigerant, the driving rotational speed of the motor-driven compressor is controlled so that air having a desired discharge temperature is discharged. However, even in this case, if the target discharge temperature is lower even if the motor compressor is driven at the minimum number of revolutions to match the target discharge temperature under a certain condition, the outdoor air inlet door is controlled in the cooling direction to adjust the target discharge temperature do.
As a result, in a conventional air conditioning system operating in an environment-friendly automobile, a series of methods for controlling an electric compressor for temperature control are limited to a method of adding and subtracting the number of revolutions of the compressor. Which is not consistent with the intention of implementing fuel efficiency improvements.
Accordingly, the present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide an air conditioner, And then the electric power consumed by the compressor is turned off when the target temperature is lower than the current temperature and the target rotation speed is lower than the minimum rotation speed of the compressor, And an object of the present invention is to provide a method of controlling the operation of a compressor.
According to another aspect of the present invention, there is provided a method of controlling the operation of an electric compressor in an auto mode of an air conditioning system, the method comprising: calculating a target discharge temperature for the air conditioning system; Comparing the target discharge temperature calculated in the step with the present temperature, and if the target discharge temperature is lower than the current temperature in the vehicle interior, Comparing the target number of rotations with a minimum number of rotations required for driving the motor-driven compressor, and turning off the motor-driven compressor when the target number of rotations of the motor-driven compressor is lower than the minimum number of rotations in the step And the like.
In the present invention, the target discharge temperature calculated in the step is characterized by comparing the amount of heat required in the interior of the vehicle with the temperature of the interior of the vehicle measured at present.
In the present invention, if the target discharge temperature is not lower than the current temperature in the passenger compartment, the drive control of the motor-driven compressor enters the step corresponding to the target rotational speed calculated in the step, And returning to the calculating step.
In the present invention, when the target rotational speed of the motor-driven compressor is not less than the minimum rotational speed, the target rotational speed of the motor-driven compressor is calculated again.
In the present invention, in the step, the driving of the motor-driven compressor is turned off, and then the operation returns to the step of calculating the target discharge temperature.
The method for controlling the operation of the electric compressor according to the present invention compares the temperature measured in the vehicle interior with the calorific value required in the vehicle interior in an environmentally friendly automobile employing the electric compressor, After the temperature and the target rotation speed of the electric compressor are calculated, if the target temperature is lower than the current temperature in the vehicle interior and the target rotation speed calculated from the minimum rotation speed of the electric compressor is low, It is possible to reduce the power consumed by the automobile and thereby improve the fuel efficiency of the automobile.
Further, the present invention controls the driving of the electric compressor to the target rotational speed when the target temperature is not lower than the current temperature in the car in the process of temporarily turning off the electric compressor, If the target rotation speed is not smaller than the minimum rotation speed of the compressor, the target rotation speed is calculated again, and then the target temperature is compared with the current temperature. Then, a series of subroutine control is repeated, The power consumption in the process can be greatly reduced.
1 is a block diagram illustrating an apparatus for implementing an operation control method of an electric compressor according to an embodiment of the present invention.
2 is a flowchart illustrating an overall control process for explaining an operation control method of an electric compressor according to an embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a control method of a compressor according to the present invention will be described in detail with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.
Further, the terms to be described below are defined in consideration of the functions of the present invention, which may vary according to the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.
In addition, the following embodiments are not intended to limit the scope of the present invention, but merely as exemplifications of the constituent elements set forth in the claims of the present invention, and are included in technical ideas throughout the specification of the present invention, Embodiments that include components replaceable as equivalents in the elements may be included within the scope of the present invention.
- Example
1 is a block diagram illustrating an apparatus for implementing an operation control method of an electric compressor according to an embodiment of the present invention.
Referring to FIG. 1, the present invention is an apparatus for controlling operation of an electric compressor applied to an air conditioning system mounted on an environmentally friendly automobile. The air conditioning system includes an
Since the
First, the air conditioning
The
The
2 is a flowchart illustrating an overall control process for explaining an operation control method of an electric compressor according to an embodiment of the present invention.
Referring to FIG. 2, the present invention is implemented through a series of control processes as follows.
First, when the air conditioning mode is selected as the auto mode by the user, the target discharge temperature is calculated by comparing the amount of heat required in the interior of the vehicle with the temperature measured in the current vehicle interior.
In this process, the
At this time, the
Subsequently, the target rotation speed for the motor-driven
In this process, the
Next, a process of comparing the target discharge temperature calculated in step S10 with the measured current temperature is performed (S14)
In this process, when the target discharge temperature is lower than the current temperature in the vehicle interior, the
Conversely, if the target discharge temperature is not lower than the current temperature in the passenger compartment, the
This process corresponds to performing the following process again from the step S10 of calculating the target discharge temperature by comparing the heat quantity required in the car room with the temperature of the current car room.
If the target discharge temperature is lower than the current temperature in the car interior, the target rotation speed for the motor-driven
In this process, when the target rotation speed is lower than the minimum rotation speed, the
On the other hand, if the target rotational speed of the motor-driven
In addition, after turning off the driving of the motor-driven
Therefore, when the air conditioning system is operated in the auto mode in the environment-friendly automobile, the operation control method of the electric compressor according to the present invention compares the temperature measured in the present vehicle interior with the heat quantity required in the vehicle interior, The target discharge temperature of the air conditioning system and the target rotational speed of the electric compressor are calculated, and then the current temperature of the vehicle interior is compared with the target temperature.
In this process, if the target temperature is lower than the current temperature in the vehicle interior, the minimum number of revolutions of the electric compressor is compared with the calculated target number of revolutions. At this time, if the target rotation speed calculated from the minimum rotation speed of the electric compressor is low, the system is switched to a mode in which the drive control for the compressor is turned off.
As a result, when the driving of the motor-driven compressor is switched to the off-state, the electric power consumed by the eco-friendly vehicle is greatly reduced, thereby improving the fuel efficiency of the eco-friendly vehicle.
Further, the present invention controls the driving of the electric compressor to the target rotational speed when the target temperature is not lower than the current temperature in the car in the process of temporarily turning off the electric compressor, If the target rotation speed is not smaller than the minimum rotation speed of the compressor, the target rotation speed is calculated again, and then the target temperature is compared with the current temperature. Then, a series of subroutine control is repeated, The power consumption in the process can be greatly reduced.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the particular details of the embodiments set forth herein. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.
10-Electric compressor 12-Condenser
14-Expansion Valve 16-Evaporator
20-air conditioning mode selection unit 22-compressor control unit
30-
Claims (5)
(S10) calculating a target discharge temperature for the air conditioning system,
A step S12 of calculating a target rotational speed of the motor-driven compressor 10 based on the target discharge temperature calculated in the step S10,
(S14) comparing the target discharge temperature calculated in the step (S10) with the current temperature,
If the target discharge temperature is lower than the current temperature in the vehicle interior in the step S14, the target rotation speed for the motor-driven compressor 10 is compared with the minimum rotation speed required for driving the motor-driven compressor 10 Step S16, and
And turning off the operation of the motor-driven compressor (10) when the target number of rotations of the motor-driven compressor (10) is lower than the minimum number of revolutions in the step (S16) Operation control method.
Wherein the target discharge temperature calculated in the step (S10) is obtained by comparing the amount of heat required in the interior of the vehicle with the temperature of the interior of the vehicle measured currently.
If it is determined in step S14 that the target discharge temperature is not lower than the current temperature in the passenger compartment, the drive control of the motor-driven compressor 10 proceeds to step S20, which is performed in accordance with the target engine speed calculated in step S12 Next, the operation returns to the step (S10) of calculating the target discharge temperature.
, And returns to the step S12 of calculating the target number of revolutions for the electric compressor (10) when the target number of revolutions of the electric compressor (10) is not smaller than the minimum number of revolutions in the step (S16) A method for controlling operation of a compressor.
Wherein the operation returns to step (S10) in which the driving of the motor-driven compressor (10) is turned off in the step (S18) and then the target discharge temperature is calculated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140027088A KR102004354B1 (en) | 2014-03-07 | 2014-03-07 | Control method for driving electric compressor |
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| KR1020140027088A KR102004354B1 (en) | 2014-03-07 | 2014-03-07 | Control method for driving electric compressor |
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| KR20150104996A KR20150104996A (en) | 2015-09-16 |
| KR102004354B1 true KR102004354B1 (en) | 2019-07-29 |
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| KR1020140027088A KR102004354B1 (en) | 2014-03-07 | 2014-03-07 | Control method for driving electric compressor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20210015458A (en) * | 2019-08-02 | 2021-02-10 | 동아전장주식회사 | Itegrated control apparatus and method of heating and cooling air-conditioner for vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000255253A (en) | 1999-03-04 | 2000-09-19 | Denso Corp | Air conditioning system |
| JP2002254917A (en) | 2001-03-01 | 2002-09-11 | Denso Corp | Air conditioner |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4559241B2 (en) * | 2005-01-21 | 2010-10-06 | 株式会社神戸製鋼所 | Refrigeration equipment |
| KR101724723B1 (en) | 2011-06-07 | 2017-04-07 | 현대자동차주식회사 | Air conditioning system of clean car and method for controlling the same |
| KR101587108B1 (en) * | 2012-03-02 | 2016-01-21 | 한온시스템 주식회사 | Control method of heat pump system for vehicle and its system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000255253A (en) | 1999-03-04 | 2000-09-19 | Denso Corp | Air conditioning system |
| JP2002254917A (en) | 2001-03-01 | 2002-09-11 | Denso Corp | Air conditioner |
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| KR20150104996A (en) | 2015-09-16 |
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