US20120312040A1 - Air conditioner in electric vehicle - Google Patents
Air conditioner in electric vehicle Download PDFInfo
- Publication number
- US20120312040A1 US20120312040A1 US13/490,552 US201213490552A US2012312040A1 US 20120312040 A1 US20120312040 A1 US 20120312040A1 US 201213490552 A US201213490552 A US 201213490552A US 2012312040 A1 US2012312040 A1 US 2012312040A1
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- United States
- Prior art keywords
- heat exchanger
- outdoor heat
- refrigerant
- outdoor
- air conditioner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
- B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H1/00899—Controlling the flow of liquid in a heat pump system
- B60H1/00907—Controlling the flow of liquid in a heat pump system where the flow direction of the refrigerant changes and an evaporator becomes condenser
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3205—Control means therefor
- B60H1/321—Control means therefor for preventing the freezing of a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H2001/00949—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising additional heating/cooling sources, e.g. second evaporator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H2001/00961—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising means for defrosting outside heat exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/008—Refrigerant heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
- F25B2313/0251—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units being defrosted alternately
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The present invention relates to an air conditioner in an electric vehicle, and more particularly to an air conditioner in an electric vehicle, which can make continuous heating operation even in defrosting operation, can enhance heating efficiency and performance even in the defrosting operation, and can recover heat discharged from various components of the electric vehicle even in the defrosting operation for preventing liquid refrigerant from being introduced to a compressor.
Description
- This application claims the benefit of the Patent Korean Application Nos. 10-2011-0056423, filed on Jun. 10, 2011, and 10-2012-0045397 filed on Apr. 30, 2012 which are hereby incorporated by reference as if fully set forth herein.
- 1. Field of the Disclosure
- The present invention relates to an air conditioner in an electric vehicle, and more particularly to an air conditioner in an electric vehicle, which can make continuous heating operation even in defrosting operation, can enhance heating efficiency and performance even in the defrosting operation, and can recover heat discharged from various components of the electric vehicle even in the defrosting operation for preventing liquid refrigerant from being introduced to a compressor.
- 2. Discussion of the Related Art
- According to recent global environmental regulation strengthening and energy cost reducing trend, demands on environment friendly EV (Electric Vehicle) is increasing. The USA and the Europe are in a state in which supply of the electric vehicle is obliged by legislation of the clean air act, and interest in, and research on, green car is active in the Korea as a part of low carbon green growth activity, too.
- The electric vehicle is provided with a motor for driving the vehicle, a battery mounted thereto for operating various electric units, and an air conditioner for cooling in summer and heating in winter.
- The air conditioner has a cycle in which refrigerant which circulates an inside thereof in an order of compression, condensation, expansion and evaporation for transfer of heat. Owing to the cycle, the air conditioner is operated in a cooling cycle for discharging the heat from a room to an outside of the room in summer, and in a heating cycle of a heat pump opposite to the cooling cycle in which the heat is supplied to the room in winter.
- In the meantime, if the air conditioner is operated in a heating cycle in winter, the refrigerant is vaporized as a heat exchanger in an outdoor unit absorbs the heat, and the refrigerant is condensed as a heat exchanger in an indoor unit discharges the heat. In the meantime, if the air conditioner is operated in the heating cycle, since frost is formed on a surface of the outdoor unit heat exchanger due to a surface temperature thereof which becomes lower significantly as the outdoor unit absorbs the heat, the heat exchange efficiency of the heat exchanger becomes poorer.
- Though a technology has been used in a related art, in which heat being discharged from an engine is used for removal of the frost from the surface of the heat exchanger, the electric vehicle has a problem in that the heat discharged from the engine can not be utilized.
- Moreover, as a method for removal of the frost from the surface of the outdoor unit heat exchanger, there is a defrosting operation method in which the circulation of the refrigerant is reversed in middle of the heating cycle to operate the refrigerating cycle in the cooling cycle. That is, if the refrigerating cycle is changed to the cooling cycle in middle of the heating cycle, the refrigerant is condensed at the outdoor heat exchanger to discharge the heat, and the heat discharged thus removes the frost from the surface of the outdoor heat exchanger.
- However, if the refrigerating cycle is operated reversely, there is a problem in that a room temperature of the electric vehicle drops in the defrosting operation.
- Accordingly, the present invention is directed to an air conditioner in an electric vehicle.
- An object of the present invention is to provide an air conditioner in an electric vehicle, which can make continuous heating operation even in defrosting operation.
- Another object of the present invention is to provide an air conditioner in an electric vehicle, which can recover heat discharged from various components of the electric vehicle even in defrosting operation for preventing liquid refrigerant from being introduced to a compressor.
- Another object of the present invention is to provide an air conditioner in an electric vehicle, which can enhance heating efficiency and performance even in defrosting operation.
- Additional advantages, objects, and features of the disclosure will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
- To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, an air conditioner in an electric vehicle having a battery and a driving unit includes a compressor for compressing refrigerant, an indoor heat exchanger for introducing the refrigerant thereto from the compressor in heating operation, first and second outdoor heat exchangers connected to the indoor heat exchanger, first and second refrigerant flow passage controllers provided between the indoor heat exchanger and each of the outdoor heat exchangers, and a controller for making defrosting operation of the first outdoor heat exchanger if the first outdoor heat exchanger meets at least one of defrosting operation starting conditions of an outdoor temperature, and refrigerant temperatures at an inlet and an outlet of the outdoor heat exchanger in the heating operation, and controlling the first and second refrigerant flow passage controllers for making the refrigerant passed through the indoor heat exchanger to be introduced only to the second outdoor heat exchanger according to a state of remained charge of the battery or the outdoor temperature.
- As has been described, the air conditioner in an electric vehicle related to a preferred embodiment of the present invention can make continuous heating operation even in defrosting operation.
- And, the air conditioner in an electric vehicle related to a preferred embodiment of the present invention can recover the heat discharged from various components of the electric vehicle even in defrosting operation for preventing liquid refrigerant from being introduced to the compressor.
- And, the air conditioner in an electric vehicle related to a preferred embodiment of the present invention can enhance heating efficiency and performance in defrosting operation.
- It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
- The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the disclosure and together with the description serve to explain the principle of the disclosure. In the drawings:
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FIG. 1 illustrates a block diagram of an air conditioner in an electric vehicle related to a first preferred embodiment of the present invention. -
FIG. 2 illustrates a component block diagram of an air conditioner in an electric vehicle related to a first preferred embodiment of the present invention. -
FIGS. 3 and 4 illustrate block diagrams each for describing an operation state of an air conditioner in an electric vehicle related to a first preferred embodiment of the present invention. -
FIG. 5 illustrates a conceptual drawing of a refrigerant heater in an air conditioner in an electric vehicle related to a preferred embodiment of the present invention. -
FIGS. 6 and 7 illustrate block diagrams each for describing a discharged heat recovery unit in air conditioner in an electric vehicle related to the present invention. -
FIG. 8 illustrates a block diagram of an air conditioner in an electric vehicle related to a second preferred embodiment of the present invention. -
FIG. 9 illustrates a block diagram of an air conditioner in an electric vehicle related to a third preferred embodiment of the present invention. -
FIG. 10 illustrates a block diagram of an air conditioner in an electric vehicle related to a fourth preferred embodiment of the present invention. -
FIG. 11 illustrates a block diagram of an air conditioner in an electric vehicle related to a fifth preferred embodiment of the present invention. - An air conditioner in an electric vehicle (Hereafter an air conditioner) related to a first preferred embodiment of the present invention will be described with reference to the attached drawings, in detail. The attached drawings are in illustrative exemplary modes of the present invention, which are provided for describing the present invention in more detail, but not for confining technical scopes of the present invention.
- Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts, repetitive description of which will be omitted, and, for convenience of description, a size or a shape of a member may be shown exaggerated or not to scale, perfectly.
- In the meantime, though terms including ordinal numbers, such as first or second, can be used for describing various elements, the elements are not confined by the terms, and, but are used only for making one element distinctive from other elements.
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FIG. 1 illustrates a block diagram of an air conditioner in an electric vehicle related to a first preferred embodiment of the present invention, andFIG. 2 illustrates a component block diagram of an air conditioner in an electric vehicle related to a first preferred embodiment of the present invention. - The
air conditioner 1 in an electric vehicle related to a first preferred embodiment of the present invention is related to anair conditioner 1 in an electric vehicle including battery 13-1 and a driving unit. - The
air conditioner 1 includes acompressor 13 for compressing refrigerant, anindoor heat exchanger 14 for introducing refrigerant thereto from thecompressor 13 in heating operation, first and secondoutdoor heat exchangers indoor heat exchanger 14, first and second refrigerantflow passage controllers indoor heat exchanger 14 and each of theoutdoor heat exchangers controller 70 for making defrosting operation of the firstoutdoor heat exchanger 11 if the firstoutdoor heat exchanger 11 meets at least one of defrosting operation starting conditions of an outdoor temperature, and refrigerant temperatures at an inlet and an outlet of the outdoor heat exchanger in the heating operation, and controlling the first and second refrigerantflow passage controllers outdoor heat exchanger 12 according to a state of remained charge of the battery or the outdoor temperature. - In this instance, the
controller 70 may finish the defrosting operation of the firstoutdoor heat exchanger 11 if the outlet side refrigerant temperature of the firstoutdoor heat exchanger 11 of which defrosting operation is being performed is higher than a set temperature. - And, the
controller 70 may perform defrosting of the secondoutdoor heat exchanger 12 in succession if the defrosting operation of the firstoutdoor heat exchanger 11 is finished, and control the first and second refrigerantflow passage controllers outdoor heat exchanger 11 according to the state of remained charge of the battery or the outdoor temperature. - Different from this, if the second
outdoor heat exchanger 12 does not meet the defrosting operation starting conditions after finishing the defrosting operation of the firstoutdoor heat exchanger 11, thecontroller 70 may control the first and second refrigerantflow passage controllers outdoor heat exchangers - Referring to
FIG. 1 , theair conditioner 1 related to the first preferred embodiment of the present invention includes anair conditioning unit 10 for cooling or heating a room space of the electric vehicle C, a dischargeheat recovery unit 30 having a working fluid for circulating aheat generation source 31 related to a driving unit of the electric vehicle to recover the discharged heat, and arefrigerant heater 40 for heating refrigerant circulating theair conditioning unit 10. - The
air conditioning unit 10 includes the firstoutdoor heat exchanger 11, the secondoutdoor heat exchanger 12, thecompressor 13, and theindoor heat exchanger 14. And, theair conditioning unit 10 may include a four-way valve 15 for change-over of a refrigerant flow passage to make theair conditioning unit 10 to be operated in the cooling cycle for the cooling operation and to be operated as the heat pump for the heating operation. - If the
air conditioning unit 10 is operated as the heat pump which heats the room space, vaporization of the refrigerant takes place at the first and secondoutdoor heat exchangers outdoor heat exchangers indoor heat exchanger 14 as heat exchange between the room air and the refrigerant takes place at theindoor heat exchanger 14. That is, the refrigerant receives the heat from the outdoor air in a course the refrigerant passes through the first and second outdoor heat exchangers, and transfers the heat to the room air in a course the refrigerant passes through the indoor heat exchanger. - A refrigerant flow path of the refrigerant circulating through the
air conditioning unit 10 will be described in more detail. The refrigerant discharged from thecompressor 13 passes through theindoor heat exchanger 14, and the refrigerant having heat exchanged thus at theindoor heat exchanger 14 is introduced to the first and secondoutdoor heat exchangers - And, the refrigerant discharged from the first and second
outdoor heat exchangers refrigerant heater 40, and the refrigerant discharged from therefrigerant heater 40 is introduced to thecompressor 13. - In the meantime, a first
electronic expansion valve 16 is mounted on a refrigerant pipeline connected between theindoor heat exchanger 14 and the firstoutdoor heat exchanger 11, and a secondelectronic expansion valve 17 is mounted on a refrigerant pipeline connected between theindoor heat exchanger 14 and the secondoutdoor heat exchanger 12. - In this instance, the first
electronic expansion valve 16 construes the first refrigerantflow passage controller 50, and the secondelectronic expansion valve 17 construes the second refrigerantflow passage controller 60. - The first refrigerant
flow passage controller 50 and the second refrigerantflow passage controller 60 may include at least one electronic expansion valve, and may include a solenoid valve and a check vale for controlling a flow passage or flow rates of the refrigerant being introduced to the first and secondoutdoor heat exchangers - The first refrigerant
flow passage controller 50 and the second refrigerantflow passage controller 60 may be configured in a variety of ways based on a number of pipelines and a number of valves through which the refrigerant flows. The first and second refrigerantflow passage controllers - The first
outdoor heat exchanger 11 and the secondoutdoor heat exchanger 12 may be connected to theindoor heat exchanger 14 in parallel, and therefrigerant pipeline 22 connected to theindoor heat exchanger 14 is branched to the first and secondoutdoor heat exchangers electronic expansion valves - And, there may be a
first solenoid valve 18 and afirst expansion valve 19 provided in parallel between the firstoutdoor heat exchanger 11 and therefrigerant heater 40. That is, the refrigerant discharged from the firstoutdoor heat exchanger 11 may be introduced to therefrigerant heater 40 passed through thefirst solenoid valve 18 in a state thefirst solenoid valve 18 is opened, and may be introduced to therefrigerant heater 40 passed through thefirst expansion valve 19 in a state thefirst solenoid valve 18 is closed. - And, there may be a
second solenoid valve 20 and asecond expansion valve 21 connected in parallel between the secondoutdoor heat exchanger 12 and therefrigerant heater 40. That is, the refrigerant discharged from the secondoutdoor heat exchanger 12 is introduced to therefrigerant heater 40 passed through thesecond solenoid valve 20 in a state thesecond solenoid valve 20 is opened, and is introduced to therefrigerant heater 40 passed through thesecond expansion valve 21 in a state thesecond solenoid valve 20 is closed. - And, the
controller 70 can control openings of the first and secondelectronic expansion valves second solenoid valves second expansion valves flow passage controller 50 may include the firstelectronic expansion valve 16, thefirst solenoid valve 18, and thefirst expansion valve 19, and the second refrigerantflow passage controller 60 may include the secondelectronic expansion valve 17, thesecond solenoid valve 20, and thesecond expansion valve 21. - In the meantime, the first and second
outdoor heat exchangers outdoor heat exchangers outdoor heat exchangers outdoor heat exchangers - In order to remove the frost, the
air conditioning unit 10 may perform the defrosting operation. A defrosting process of the first and secondoutdoor heat exchangers -
FIGS. 3 and 4 illustrate block diagrams each for describing an operation state of an air conditioner in an electric vehicle related to a first preferred embodiment of the present invention. - The
controller 70 determines whether one of theoutdoor heat exchangers - As one mode of the embodiment, the
controller 70 may determine whether the defrosting operation starting condition is met or not by measuring the refrigerant temperature passed through theoutdoor heat exchangers controller 70 may finish the defrosting operation of a relevantoutdoor heat exchanger - An alternated defrosting process of the first
outdoor heat exchanger 11 and the secondoutdoor heat exchanger 12 in theair conditioner 1 related to the first embodiment will be described with reference to the attached drawing, in detail. - In the meantime, as described before, if the second
outdoor heat exchanger 12 does not meet the defrosting operation starting condition even after the defrosting operation of the firstoutdoor heat exchanger 11 is finished as the firstoutdoor heat exchanger 11 meets the defrosting operation starting condition, the alternated defrosting operation is not made, but a general heating operation may be performed, when thecontroller 70 controls the flow rate of the refrigerant being introduced to the first and secondoutdoor heat exchangers - At first, a process for operating the first
outdoor heat exchanger 11 as a condenser for defrosting the firstoutdoor heat exchanger 11, and for operating the secondoutdoor heat exchanger 12 as an evaporator for making continuous heating in the defrosting process. - Referring to
FIG. 3 , the controller 70 (SeeFIG. 2 ) opens the firstelectronic expansion valve 16 connected to the firstoutdoor heat exchanger 11, and closes thefirst solenoid valve 18. The refrigerant condensed in a course the refrigerant passes through theindoor heat exchanger 14 does not expand in a course the refrigerant passes through the firstelectronic expansion valve 16, but condenses in a course the refrigerant passes through the firstoutdoor heat exchanger 11. - Therefore, the first
outdoor heat exchanger 11 is operated as a condenser like theindoor heat exchanger 14, to make the defrosting of the firstoutdoor heat exchanger 11. In the meantime, the refrigerant discharged from the firstoutdoor heat exchanger 11 expands in a course the refrigerant passes through thefirst expansion valve 19, and is introduced to therefrigerant heater 40. - At the same time with this, the
controller 70 controls opening of the secondelectronic expansion valve 17 connected to the secondoutdoor heat exchanger 12, and opens thesecond solenoid valve 20. The refrigerant condensed in a course of passing through theindoor heat exchanger 14 expands in a course of passing through the secondelectronic expansion valve 17, and vaporizes in a course of passing through the secondoutdoor heat exchanger 12. - Therefore, different from the first
outdoor heat exchanger 11, the secondoutdoor heat exchanger 12 is operated as an evaporator, and the refrigerant discharged from the secondoutdoor heat exchanger 12 is introduced to therefrigerant heater 40 after passing through thesecond solenoid valve 20. - In this instance, since the refrigerant discharged from the first
outdoor heat exchanger 11 is not vaporized, the refrigerant is required to vaporize before being introduced to thecompressor 13. The refrigerant may vaporize in a course of passing through therefrigerant heater 40. - Thus, since the second
outdoor heat exchanger 12 is operated as an evaporator even during the defrosting of the firstoutdoor heat exchanger 11, the room space can be heated, continuously. - A process will be described, for operating the second
outdoor heat exchanger 12 as a condenser for defrosting the secondoutdoor heat exchanger 12, and for operating the firstoutdoor heat exchanger 11 as an evaporator for making continuous heating in the defrosting process. - Referring to
FIG. 4 , the controller 70 (SeeFIG. 2 ) opens the secondelectronic expansion valve 17 connected to the secondoutdoor heat exchanger 12, and closes thesecond solenoid valve 20. The refrigerant condensed in a course the refrigerant passes through theindoor heat exchanger 14 does not expand in a course the refrigerant passes through the secondelectronic expansion valve 17, but condenses in a course the refrigerant passes through the secondoutdoor heat exchanger 12. - Therefore, the second
outdoor heat exchanger 12 is operated as a condenser like theindoor heat exchanger 14, to make the defrosting of the secondoutdoor heat exchanger 12. In the meantime, the refrigerant discharged from the secondoutdoor heat exchanger 12 expands in a course the refrigerant passes through thesecond expansion valve 21, and is introduced to therefrigerant heater 40. - At the same time with this, the
controller 70 controls opening of the firstelectronic expansion valve 16 connected to the firstoutdoor heat exchanger 11, and opens thefirst solenoid valve 18. The refrigerant condensed in a course of passing through theindoor heat exchanger 14 expands in a course of passing through the firstelectronic expansion valve 16, and vaporizes in a course of passing through the firstoutdoor heat exchanger 11. - Therefore, different from the second
outdoor heat exchanger 12, the firstoutdoor heat exchanger 11 is operated as an evaporator, and the refrigerant discharged from the firstoutdoor heat exchanger 11 is introduced to therefrigerant heater 40 after passing through thefirst solenoid valve 18. - In this instance, since the refrigerant discharged from the second
outdoor heat exchanger 12 is not vaporized, the refrigerant is required to vaporize before being introduced to thecompressor 13. The refrigerant may vaporize in a course of passing through therefrigerant heater 40. - Thus, since the first
outdoor heat exchanger 11 is operated as an evaporator even during the defrosting of the secondoutdoor heat exchanger 12, the room space can be heated, continuously. - For the defrosting operation of the first
outdoor heat exchanger 11 and the secondoutdoor heat exchanger 12, thecontroller 70 can determine whether the frost is formed or not by measuring evaporation temperatures of theoutdoor heat exchangers - And, the first
outdoor heat exchanger 11 and the secondoutdoor heat exchanger 12 may be arranged on a front side of the electric car, side by side in a vertical direction. In this case, the secondoutdoor heat exchanger 12 close to a road surface may be defrosted at first. - In the meantime, the
refrigerant heater 40 may have a chamber of a predetermined volume through which the refrigerant and a working fluid for heating the refrigerant to pass. - The
refrigerant heater 40 and the dischargedheat recovery unit 30 will be described with reference to the attached drawings, in detail. -
FIG. 5 illustrates a conceptual drawing of arefrigerant heater 40 in an air conditioner in an electric vehicle related to a preferred embodiment of the present invention, andFIGS. 6 and 7 illustrate block diagrams each for describing a dischargedheat recovery unit 30 in air conditioner in an electric vehicle related to the present invention. - The electric vehicle may have a motor 31-2 for driving the electric vehicle, a battery 31-1 for charging electricity therein, a converter (Not shown), and an inverter 331-3 (Not shown) provided thereto.
- In a process of operation of the electric vehicle, heat is generated from the motor 31-2, the inverter 31-3 and the battery 31-1, and the discharged
heat recovery unit 30 may include aheat generation unit 31 including at least one of the motor, the converter, the inverter, and the battery, a working fluid for circulating theheat generation source 31 to recover the heat from theheat generation source 31, and apump 32 for circulating the working fluid. - As one mode of the embodiment, in order to construe the discharged
heat recovery unit 30, the motor 31-2, the converter, and the inverter 31-3 may be arranged in series along a circulating course of the working fluid, for the working fluid to have a temperature which is elevated in a course of passing through theheat generation source 31. - Referring to
FIG. 5 , provided therein therefrigerant heater 40, there may be a flow passage for passing the refrigerant R therethrough, and a flow passage for passing the working fluid (For an example, cooling water) therethrough. - And, the
refrigerant heater 40 may have a double pipe structure such that the refrigerant R flows through an inner pipe and the working fluid flows through an outer pipe. Or, different from this, the working fluid may flow through the inner pipe, and the refrigerant R may flow through the outer pipe. - Therefore, in a course the refrigerant and the working fluid pass through the
refrigerant heater 40 respectively, the heat transfers from the working fluid to the refrigerant, to heat the refrigerant before the refrigerant is introduced to thecompressor 13. - In the meantime, for a case in which heating of the refrigerant is not adequate only with the heat recovered from the
heat generation source 31, therefrigerant heater 40 may include aheater 43 for heating the refrigerant, and the heater may be an induction heater. - In the meantime, the discharged
heat recovery unit 30 may include a heat accumulator (Not shown) for storage of the discharged heat recovered from theheat generation source 31, additionally. The heat accumulator may have a phase change material PCM provided therein for storage of an amount of heat by heat exchange with the working fluid. - The heat stored in the phase change material may heat the refrigerant together with the heat recovered from the
heat generation source 31 at the time of the defrosting operation of theair conditioning unit 10. - In comparison to general heating operation in which the room space of the electric vehicle is heated with the two
outdoor heat exchangers compressor 13 is elevated with therefrigerant heater 40, to elevate an air blow out temperature from theindoor heat exchanger 14, the heating performance can be made higher. - In the meantime, since heating of the refrigerant with the
refrigerant heater 40 is required only in the defrosting operation of the first or secondoutdoor heat exchanger controller 70 may put thepump 32 of the dischargedheat recovery unit 30 only in the defrosting operation of one of theoutdoor heat exchangers - Referring to
FIG. 6 , the dischargedheat recovery unit 30 may include a supplementaryindoor heat exchanger 33 connected to make the working fluid having the discharged heat recovered from the heat generation source flow therethrough. - The supplementary
indoor heat exchanger 33 may be positioned in aduct 80 connected to the room space of the electric vehicle together with theindoor heat exchanger 14 described before, and thecontroller 70 may control such that the heating is performed with the supplementaryindoor heat exchanger 33 and theindoor heat exchanger 14 in general heating. - The
duct 80 has a roomair suction hole 81 and a roomair discharge hole 82 in communication with the room space such that the air introduced to the roomair suction hole 81 is heated in a course passing through the supplementaryindoor heat exchanger 33 and theindoor heat exchanger 14 and is discharged to the room space again. - In the meantime, the discharged
heat recovery unit 30 may include a flow passage change-over valve (Not shown) for making the working fluid to flow to the supplementaryindoor heat exchanger 33 in general heating, and to therefrigerant heater 40 in the defrosting operation. The flow passage change-over valve may be a four-way valve. - Therefore, the
controller 70 may improve heating performance by controlling the first and second refrigerantflow passage controllers outdoor heat exchangers indoor heat exchanger 33. - Different from this, the
controller 70 may improve heating efficiency of theair conditioning unit 10 by lowering the heating load of the compressor in theair conditioning unit 10 and compensating for a lost portion with the supplementaryindoor heat exchanger 33. - And, once the first
outdoor heat exchanger 11 is put into the defrosting operation, thecontroller 70 may control the first refrigerantflow passage controller 50 to make the firstoutdoor heat exchanger 11 to operate as a condenser, and controls the second refrigerantflow passage controller 60 to make the secondoutdoor heat exchanger 12 to operate as an evaporator for the continuous heating, and, at the same time with this, changes-over a flow of the working fluid of the dischargedheat recovery unit 30 to heat the refrigerant with the discharged heat from the dischargedheat recovery unit 30 for enhancing the heating performance. - In detail, in general heating operation, the
controller 70 may control the flow passage change-over valve to introduce the working fluid from the dischargedheat recovery unit 30 to the supplementaryindoor heat exchanger 33, and, in defrosting operation, thecontroller 70 may control the flow passage change-over valve to introduce the working fluid from the dischargedheat recovery unit 30 to therefrigerant heater 40. - Accordingly, the heating efficiency and heating performance of the
air conditioner 1 can be enhanced, and a battery use time period can be increased. - Different from this, referring to
FIG. 7 , the dischargedheat recovery unit 30 may include a supplementaryoutdoor heat exchanger 34 connected to make the working fluid having the discharged heat recovered from theheat generation source 31 to flow therethrough. The supplementaryoutdoor heat exchanger 34 may be positioned on an outdoor air suction side or an outdoor air discharge side of theoutdoor heat exchangers outdoor heat exchanger 34 may be arranged in front of or in rear of theoutdoor heat exchangers - In general heating operation, the
controller 70 may elevate a temperature of the outdoor air being introduced to theoutdoor heat exchangers outdoor heat exchanger 34, or, in defrosting operation of one of theoutdoor heat exchangers outdoor heat exchanger 34. If the working fluid flows to the supplementaryoutdoor heat exchanger 34, formation of the frost can be delayed to delay the defrosting operation starting time or to shorten a defrosting operation time period. - And, as described before, the
controller 70 may control the first refrigerantflow passage controller 50 to the firstoutdoor heat exchanger 11 as a condenser if the firstoutdoor heat exchanger 11 is put into the defrosting operation, and the second refrigerantflow passage controller 60 to the secondoutdoor heat exchanger 12 as an evaporator for making continuous heating, and, at the same time with this, may changes-over a flow of the working fluid of the dischargedheat recovery unit 30 to heat the refrigerant with the discharged heat of the dischargedheat recovery unit 30 for enhancing the heating performance. - And, the discharged
heat recovery unit 30 may include a flow passage change-over valve which can make the working fluid to be introduced to therefrigerant heater 40 or to the supplementaryoutdoor heat exchanger 34, selectively. The flow passage change-over valve may be a four-way valve. - As one mode of the embodiment, in general heating operation, the
controller 70 may control the flow passage change-over valve to make the working fluid to be introduced from the dischargedheat recovery unit 30 to the supplementaryoutdoor heat exchanger 34, and, in defrosting operation, thecontroller 70 may control the flow passage change-over valve to make the working fluid to be introduced to therefrigerant heater 40 from the dischargedheat recovery unit 30. - Therefore, the heating efficiency and heating performance of the
air conditioner 1 can be enhanced, and a time period of use of the battery can be increased. - And, the discharged
heat recovery unit 30 may include the supplementaryoutdoor heat exchanger 34 and the supplementaryindoor heat exchanger 33, and theheat generation source 31, the supplementaryoutdoor heat exchanger 34, the supplementaryindoor heat exchanger 33, and thepump 32 in the dischargedheat recovery unit 30 may construe one cycle. - In this instance, the supplementary
indoor heat exchanger 33 may perform a function of providing supplementary heating heat for heating the room space with the discharged heat recovered from theheat generation source 31, and supplementaryoutdoor heat exchanger 34 may perform a function of discharging heat from the battery 31-1, the motor 31-5 and so on. - In the general heating, the
controller 70 may control to perform heating with the supplementaryindoor heat exchanger 33 and theindoor heat exchanger 14, and to make the battery and so on to discharge heat through the supplementaryoutdoor heat exchanger 34. - As described before, the supplementary
outdoor heat exchanger 34 may be positioned on the outdoor air suction side or the outdoor air discharge side of theoutdoor heat exchangers controller 70 may heat the room space with the supplementaryindoor heat exchanger 33, and may elevate a surrounding air temperature of the outdoor heat exchanger of which defrosting operation is performed with the supplementaryoutdoor heat exchanger 34 for shortening the defrosting operation time period. - In the meantime, the
controller 70 may control the first and second refrigerant flow passage controllers to operate the first and secondoutdoor heat exchangers controller 70 may control both the firstoutdoor heat exchanger 11 and the secondoutdoor heat exchanger 12 to be operated as evaporators, and, in cooling operation, thecontroller 70 may control both the firstoutdoor heat exchanger 11 and the secondoutdoor heat exchanger 12 to be operated as condensers. - And, in heating operation, the
controller 70 may control the first and second refrigerantflow passage controllers -
FIG. 8 illustrates a block diagram of an air conditioner in an electric vehicle related to a second preferred embodiment of the present invention. - Referring to
FIG. 8 , theair conditioner 1 related to the second embodiment has a position of therefrigerant heater 70 different from therefrigerant heater 40 in the first embodiment. And, other configuration is identical except the position of therefrigerant heater 70, and detailed description of the identical configuration will be omitted. - Though the first embodiment suggests providing the
refrigerant heater 40 at a position for heating the refrigerant being introduced to thecompressor 13 in defrosting operation, the embodiment suggests providing therefrigerant heater 70 between theindoor heat exchanger 14 and theoutdoor heat exchangers outdoor heat exchangers -
FIG. 9 illustrates a block diagram of anair conditioner 100 in an electric vehicle related to a third preferred embodiment of the present invention, andFIG. 10 illustrates a block diagram of anair conditioner 200 in an electric vehicle related to a fourth preferred embodiment of the present invention. - The
air conditioner air conditioner 1 described in the first embodiment, with only difference in configurations of the first refrigerant flow passage controller and the second refrigerant flow passage controller. - That is, the third or the fourth embodiment is identical to the first embodiment in that, if the first
outdoor heat exchanger indoor heat exchanger outdoor heat exchanger outdoor heat exchanger outdoor heat exchanger outdoor heat exchanger - However, positions and a number of the valves and the pipelines on which the valves are mounted are different from the first embodiment.
- In the meantime, the discharged
heat recovery unit heat recovery unit 30 described in the first embodiment. In detail, the refrigerant being introduced to the outdoor heat exchanger from therefrigerant heater compressor heat recovery unit - And, the discharged
heat recovery unit heat generation source pump heat recovery unit - In this instance, the supplementary indoor heat exchanger performs a function of providing supplementary heating heat for heating the room space with the discharged heat recovered from the heat generation source, and the supplementary outdoor heat exchanger performs a function of discharging heat from the battery and so on.
- In general heating, the controller may control to perform heating with the supplementary indoor heat exchanger and the indoor heat exchanger, and to have the battery and so on to discharge the heat through the supplementary outdoor heat exchanger.
- As described before, the supplementary outdoor heat exchanger may be positioned on an outdoor air suction side or an outdoor air discharge side of the outdoor heat exchanger, when the controller may heat the room space with the supplementary indoor heat exchanger in defrosting operation, and may elevate a surrounding air temperature of the outdoor heat exchanger of which defrosting operation is being performed with the supplementary outdoor heat exchanger for shortening a defrosting operation time period.
- The third and fourth embodiments will be described centered on differences from the first embodiment with reference to the attached drawings, in detail.
- Referring to
FIG. 9 , theair conditioner 100 includes abypass pipeline 170 connected between thecompressor 113 and each of theoutdoor heat exchangers valves 171 provided to the bypass pipeline 170, additionally. In defrosting operation, the controller may make a portion of the refrigerant discharged from thecompressor 113 to be introduced to the outdoor heat exchanger which is put into defrosting operation, and the other portion of the refrigerant to be introduced to the indoor heat exchanger and the outdoor heat exchanger which performs the heating operation. - In detail, the by
pass pipeline 170 has thefirst valve 171 provided thereto for controlling the refrigerant being introduced to the firstoutdoor heat exchanger 111, and asecond valve 172 provided thereto for controlling the refrigerant being introduced to the secondoutdoor heat exchanger 112. - And, there may be a
first expansion valve 151 and afirst check valve 152 provided in parallel between theindoor heat exchanger 114 and the firstoutdoor heat exchanger 111, and thefirst expansion valve 151 and thefirst check valve 152 may construe a first refrigerantflow passage controller 150. - And, there may be a
second expansion valve 161 and asecond check vale 162 provided in parallel between theindoor heat exchanger 114 and the secondoutdoor heat exchanger 112, and thesecond expansion valve 161 and thesecond check vale 162 may construe a second refrigerantflow passage controller 160. - If the first
outdoor heat exchanger 111 is put into defrosting operation, a portion of the refrigerant compressed at thecompressor 113 may be introduced to the firstoutdoor heat exchanger 111 along thebypass pipeline 170, when the controller opens thefirst valve 171 and closes thesecond valve 172 for defrosting the firstoutdoor heat exchanger 111. - And, the other portion of the refrigerant discharged from the
compressor 113 and passed through the firstoutdoor heat exchanger 111 is introduced only to the secondoutdoor heat exchanger 112 for making continuous heating with the secondoutdoor heat exchanger 112. - In this instance, the controller controls to close the
first expansion valve 151, and to adjust opening of thesecond expansion valve 161 so that the other portion of the refrigerant passed through theindoor heat exchanger 114 is, not to be introduced to the firstoutdoor heat exchanger 111, but to be introduced to, and to vaporize at, the secondoutdoor heat exchanger 112. - Referring to
FIG. 10 , theair conditioner 200 includes a bypass line 270 connected between thecompressor 213 and each of theoutdoor heat exchangers valves 271 to 274 provided to the bypass pipeline 270 additionally, and, in defrosting operation, the controller may make a portion of the refrigerant discharged from thecompressor 213 to flow to the outdoor heat exchanger of which defrosting operation is starting, and the other portion of the refrigerant to flow to the indoor heat exchanger and the outdoor heat exchanger which performs the heating. - In detail, a
first check valve 273 is provided to the bypass line 270 between the firstoutdoor heat exchanger 211 and a fourway valve 272, and asecond check valve 274 is provided between the secondoutdoor heat exchanger 212 and the fourway valve 272, and the fourway valve 272 is provided at a branch point of thefirst check valve 273 and thesecond check valve 274. And, the bypass pipeline 270 has afirst valve 271 which is opened only in the defrosting operation provided thereto. - That is, if the
first valve 271 is opened, a portion of the refrigerant compressed at thecompressor 213 flows along the bypass line 270, and may be introduced to the firstoutdoor heat exchanger 211 or the secondoutdoor heat exchanger 212 by the fourway valve 272. - In this instance, if the refrigerant compressed at the
compressor 213 is introduced to the firstoutdoor heat exchanger 211 by the fourway valve 272, defrosting of the firstoutdoor heat exchanger 211 is made, and, if the fourway valve 272 makes change-over of the flow passage, the refrigerant compressed at thecompressor 213 is introduced to the secondoutdoor heat exchanger 212, and defrosting of the secondoutdoor heat exchanger 212 is made. - And, a
first expansion valve 251 may be provided between theindoor heat exchanger 214 and theoutdoor heat exchanger second valve 252 may be provided between afirst expansion valve 251 and the fourway valve 272, and asecond expansion valve 261 and athird check valve 262 may be provided in parallel to thesecond valve 252. In this instance, the refrigerant passed through thesecond valve 252 flows toward the fourway valve 272, and may flow toward the firstoutdoor heat exchanger 211 or the secondoutdoor heat exchanger 212 according to a flow passage of the fourway valve 272. - And, the refrigerant passed through the
second expansion valve 261 may be connected to a pipeline having the first check valve provided thereto, and a pipeline having thesecond check valve 274 provided thereto. - In this instance, in defrosting operation of the first
outdoor heat exchanger 211, by the fourway valve 272, a portion of the refrigerant compressed at thecompressor 213 is introduced to the firstoutdoor heat exchanger 211, and the refrigerant passed through theindoor heat exchanger 214 is introduced to the secondoutdoor heat exchanger 212. In defrosting operation of the secondoutdoor heat exchanger 212, by the fourway valve 272, a portion of the refrigerant compressed at thecompressor 213 is introduced to the secondoutdoor heat exchanger 212, and the refrigerant passed through theindoor heat exchanger 214 is introduced to the firstoutdoor heat exchanger 211. - Though a case has been described, in which the outdoor heat exchanger is defrosted, dividing the outdoor heat exchanger into the first and second
outdoor heat exchangers -
FIG. 11 illustrates a block diagram of an air conditioner in an electric vehicle related to a fifth preferred embodiment of the present invention. - Referring to
FIG. 11 , theair conditioner 300 may include anair conditioning unit 310 having first to thirdoutdoor heat exchangers 311 to 313 connected to an indoor heat exchanger in parallel, and a dischargedheat recovery unit 330 including heat generation sources, such as a motor, and so on. - The
air conditioning unit 310 is identical to theair conditioning unit 10 described in the first embodiment except that the outdoor heat exchanger is divided into three outdoor heat exchangers. - And, the discharged
heat recovery unit 330 is identical to the dischargedheat recovery unit 30 described in the first embodiment. - As one mode of the embodiment, the
air conditioner 300 can make continuous heating operation by using the first and secondoutdoor heat exchangers outdoor heat exchanger 313. - As has been described, the air conditioner in an electric vehicle related to a preferred embodiment of the present invention can make continuous heating operation even in defrosting operation.
- And, the air conditioner in an electric vehicle related to a preferred embodiment of the present invention can recover the heat discharged from various components of the electric vehicle even in defrosting operation for preventing liquid refrigerant from being introduced to the compressor.
- And, the air conditioner in an electric vehicle related to a preferred embodiment of the present invention can enhance heating efficiency and performance in defrosting operation.
- It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. Thus, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (13)
1. An air conditioner in an electric vehicle having a battery and a driving unit comprising:
a compressor for compressing refrigerant;
an indoor heat exchanger for introducing the refrigerant thereto from the compressor in heating operation;
first and second outdoor heat exchangers connected to the indoor heat exchanger;
first and second refrigerant flow passage controllers provided between the indoor heat exchanger and each of the outdoor heat exchangers; and
a controller for making defrosting operation of the first outdoor heat exchanger if the first outdoor heat exchanger meets at least one of defrosting operation starting conditions of an outdoor temperature, and refrigerant temperatures at an inlet and an outlet of the outdoor heat exchanger in the heating operation, and controlling the first and second refrigerant flow passage controllers for making the refrigerant passed through the indoor heat exchanger to be introduced only to the second outdoor heat exchanger according to a state of remained charge of the battery or the outdoor temperature.
2. The air conditioner as claimed in claim 1 , wherein the controller finishes the defrosting operation of the first outdoor heat exchanger if the refrigerant temperature at the outlet of the first outdoor heat exchanger of which defrosting operation is being performed is higher than a set temperature.
3. The air conditioner as claimed in claim 2 , wherein the controller performs defrosting of the second outdoor heat exchanger in succession if the defrosting operation of the first outdoor heat exchanger is finished, and controls the first and second refrigerant flow passage controllers for making the refrigerant passed through the indoor heat exchanger to be introduced only to the first outdoor heat exchanger according to the state of remained charge of the battery or the outdoor temperature.
4. The air conditioner as claimed in claim 2 , wherein the controller controls the first and second refrigerant flow passage controllers for controlling flow rates of the refrigerant being introduced to the first and second outdoor heat exchangers according to the state of remained charge of the battery or the outdoor temperature, if the second outdoor heat exchanger does not meet the defrosting operation starting condition after finishing the defrosting operation of the first outdoor heat exchanger.
5. The air conditioner as claimed in claim 1 , further comprising a discharged heat recovery unit having a working fluid for circulating at least one of heat generation sources of the battery and a motor to recover discharged heat from the heat generation source.
6. The air conditioner as claimed in claim 5 , further comprising a refrigerant heater for heating the refrigerant with the discharged heat of the discharged heat recovery unit,
wherein the refrigerant heater heats the refrigerant being introduced to the compressor in the defrosting operation, or the refrigerant being introduced to the outdoor heat exchanger.
7. The air conditioner as claimed in claim 5 , wherein the discharged heat recovery unit includes a supplementary indoor heat exchanger and a supplementary outdoor heat exchanger connected to make the working fluid having the discharged heat recovered from the heat generation sources to flow therethrough, and
the controller controls to perform heating with the supplementary indoor heat exchanger and the indoor heat exchanger in general heating operation, and to have the battery to discharge heat through the supplementary outdoor heat exchanger.
8. The air conditioner as claimed in claim 7 , wherein the supplementary outdoor heat exchanger is positioned at an outdoor air suction side or an outdoor air discharge side of the outdoor heat exchanger.
9. The air conditioner as claimed in claim 8 , wherein, in defrosting operation, the controller heats the room space with the supplementary indoor heat exchanger, and elevates a surrounding air temperature of the outdoor heat exchanger of which defrosting operation is performed with the supplementary outdoor heat exchanger for shortening a defrosting operation time period.
10. The air conditioner as claimed in claim 1 , further comprising a by pass pipeline connected between the compressor and each of the outdoor heat exchangers, and a plurality of valves provided to the by pass pipeline, and,
in defrosting operation, the controller makes a portion of the refrigerant discharged from the compressor to be introduced to the outdoor heat exchanger which is put into defrosting operation, and the other portion of the refrigerant to be introduced to the indoor heat exchanger and the outdoor heat exchanger which performs the heating operation.
11. The air conditioner as claimed in claim 1 , wherein the controller controls the first and second refrigerant flow passage controllers to operate the first and second outdoor heat exchangers at the same condition according to the outdoor temperature and a heating load.
12. The air conditioner as claimed in claim 1 , wherein, in the heating operation, the controller controls the first and second refrigerant flow passage controllers to make only one, or all, of a plurality of the outdoor heat exchangers is operated according to the remained state of charge in the battery.
13. The air conditioner as claimed in claim 1 , wherein the first refrigerant flow passage controller includes a first electronic expansion valve provided between the first outdoor heat exchanger and the indoor heat exchanger,
the second refrigerant flow passage controller includes a second electronic expansion valve provided between the second outdoor heat exchanger and the indoor heat exchanger, and
the controller opens the first electronic expansion valve, and controls opening of the second electronic expansion valve, if the first outdoor heat exchanger meets the defrosting operation starting condition.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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KR10-2011-0056423 | 2011-06-10 | ||
KR20110056423 | 2011-06-10 | ||
KR10-2012-0045397 | 2012-04-30 | ||
KR1020120045397A KR101342385B1 (en) | 2011-06-10 | 2012-04-30 | Air conditioner for electric vehicle |
Publications (1)
Publication Number | Publication Date |
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US20120312040A1 true US20120312040A1 (en) | 2012-12-13 |
Family
ID=47904440
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/490,552 Abandoned US20120312040A1 (en) | 2011-06-10 | 2012-06-07 | Air conditioner in electric vehicle |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120312040A1 (en) |
EP (1) | EP2718130B1 (en) |
KR (1) | KR101342385B1 (en) |
CN (1) | CN103596783B (en) |
WO (1) | WO2012169764A2 (en) |
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Also Published As
Publication number | Publication date |
---|---|
WO2012169764A2 (en) | 2012-12-13 |
EP2718130B1 (en) | 2018-08-08 |
WO2012169764A3 (en) | 2013-04-04 |
KR101342385B1 (en) | 2013-12-16 |
CN103596783A (en) | 2014-02-19 |
CN103596783B (en) | 2016-07-06 |
KR20120137221A (en) | 2012-12-20 |
EP2718130A4 (en) | 2015-11-25 |
EP2718130A2 (en) | 2014-04-16 |
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