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KR-20260062168-A - METHOD FOR HEATING CONTROL AND HVAC SYSTEM THEREOF

KR20260062168AKR 20260062168 AKR20260062168 AKR 20260062168AKR-20260062168-A

Abstract

According to various embodiments, in the operation of an electric vehicle air conditioning system comprising a main heating unit in which a first refrigerant circulates and an auxiliary heating unit in which a second refrigerant circulates, the first refrigerant or the second refrigerant comprises at least one of: a natural refrigerant; a hydrofluorocarbon (HFC)-based refrigerant; a hydrofluoroolefin (HFO)-based refrigerant; a hydrochlorofluorocarbon (HCFC)-based refrigerant; a hydrocarbon-based refrigerant that is not a natural refrigerant; and a halon or perfluorocarbon (PFC)-based refrigerant. A heating control method for an air conditioning system and the air conditioning system thereof may be provided.

Inventors

  • 이수진
  • 노지성

Assignees

  • 에스케이이노베이션 주식회사
  • 에스케이온 주식회사

Dates

Publication Date
20260507
Application Date
20241025

Claims (20)

  1. In the operation of an electric vehicle air conditioning system comprising a main heating unit in which a first refrigerant circulates and an auxiliary heating unit in which a second refrigerant circulates, The first refrigerant or the second refrigerant comprises at least one of: a natural refrigerant; a hydrofluorocarbon (HFC)-based refrigerant; a hydrofluoroolefin (HFO)-based refrigerant; a hydrochlorofluorocarbon (HCFC)-based refrigerant; a hydrocarbon-based refrigerant that is not a natural refrigerant; and a halon or perfluorocarbon (PFC)-based refrigerant. Heating control method for an air conditioning system.
  2. In paragraph 1, The above natural refrigerant comprises at least one of methane (R-50), ammonia (R-717), carbon dioxide (R-744), ethane (R-170), and propane (R-290). Heating control method for an air conditioning system.
  3. In paragraph 1, The above hydrofluorocarbon (HFC) refrigerants are among difluoromethane (R-32), 1,1-difluoroethane (R-152a), pentafluoroethane (R-125), 1,1,1,2-tetrafluoroethane (R-134a), 1,1,1-trifluoroethane (R-143a), trifluoromethane (R-23), fluoroethane (R-161), 1,1,1,2,3,3,3-heptafluoropropane (R-227ea), 1,1,1,2,3,3-hexafluoropropane (R-236ea), 1,1,1,3,3,3-hexafluoropropane (R-236fa), 1,1,1,3,3-pentafluoropropane (R-245fa), and 1,1,1,3,3-pentafluorobutane (R-365mfc). including at least one, Heating control method for an air conditioning system.
  4. In paragraph 1, The above hydrofluoroolefin (HFO)-based refrigerant comprises at least one of 1,1,2-trifluoroethylene (R-1123), 1-chloro-2,3,3,3-tetrafluoropropene (R1224yd(Z)), 2,3,3,3-tetrafluoropropene (R-1234yf), 1,3,3,3-tetrafluoropropene (R-1234ze), 1,2,3,3-tetrafluoropropene (R-1234ye), 3,3,3-trifluoropropene (R-1243zf), 1,1-difluoroethylene (R-1132a), and 1,2,3,3,3-pentafluoropropene (R-1225ye). Heating control method for an air conditioning system.
  5. In paragraph 1, The above hydrochlorofluorocarbon (HCFC)-based refrigerant comprises at least one of difluorochloromethane (R-22), chlorotetrafluoroethane (R-124), and 1-chloro-1,1-difluoroethane (R-142b). Heating control method for an air conditioning system.
  6. In paragraph 1, The above hydrocarbon refrigerant, which is not a natural refrigerant, comprises at least one of propylene (R-1270), isobutane (R-600a), dimethyl ether, isopentane, and pentane. Heating control method for an air conditioning system.
  7. In paragraph 1, The above-mentioned halon or perfluorocarbon (PFC) refrigerant comprises at least one of trifluoroiodomethane (R-13I1), octafluoropropane (R-218), and octafluorocyclobutane (RC318). Heating control method for an air conditioning system.
  8. In paragraph 1, A step of heating the second refrigerant using heat generated from the battery during the charging of the battery of the electric vehicle; A step of circulating the first refrigerant and the second refrigerant when the operation of the heating mode is determined according to user input after starting the electric vehicle; A step comprising supplying air heated using the first refrigerant to the interior of the electric vehicle based on the temperature of the first refrigerant, or supplying air heated using the second refrigerant to the interior; Heating control method for an air conditioning system.
  9. In paragraph 8, In the step of circulating the first refrigerant and the second refrigerant, When the temperature of the second refrigerant is below a preset first temperature, the second refrigerant is heated using a heating electronic element. Heating control method for an air conditioning system.
  10. In paragraph 8, In the step of supplying the heated air into the room, When the temperature of the first refrigerant is lower than or equal to the second temperature, air passing through the heat exchanger of the auxiliary heating unit is supplied to the room, or When the temperature of the first refrigerant exceeds the second temperature, the operation of the auxiliary heating unit is stopped, and air passing through the heater core of the main heating unit is supplied to the room. Heating control method for an air conditioning system.
  11. An air conditioning system for an electric vehicle comprising a main heating unit in which a first refrigerant circulates and an auxiliary heating unit in which a second refrigerant circulates; and The above main heating unit is, A compressor that compresses the first refrigerant; A heat core in which the above-mentioned first refrigerant exchanges heat; and It includes the compressor and a first pipe configured to allow the first refrigerant to circulate through the heat core; The above auxiliary heating unit is, A heating tank storing the above-mentioned second refrigerant; A pump for moving the second refrigerant; A heat exchanger in which the above-mentioned second refrigerant exchanges heat; and It includes a second pipe configured to allow the second refrigerant to circulate through the heating tank, the pump, and the heat exchanger; The first refrigerant or the second refrigerant comprises at least one of a natural refrigerant; a hydrofluorocarbon (HFC)-based refrigerant; a hydrofluoroolefin (HFO)-based refrigerant; a hydrochlorofluorocarbon (HCFC)-based refrigerant; a hydrocarbon-based refrigerant that is not a natural refrigerant; and a halon or perfluorocarbon (PFC)-based refrigerant. Air conditioning system for heating control.
  12. In Paragraph 11, The above natural refrigerant comprises at least one of methane (R-50), ammonia (R-717), carbon dioxide (R-744), ethane (R-170), and propane (R-290). Air conditioning system for heating control.
  13. In Paragraph 11, The above hydrofluorocarbon (HFC) refrigerants are among difluoromethane (R-32), 1,1-difluoroethane (R-152a), pentafluoroethane (R-125), 1,1,1,2-tetrafluoroethane (R-134a), 1,1,1-trifluoroethane (R-143a), trifluoromethane (R-23), fluoroethane (R-161), 1,1,1,2,3,3,3-heptafluoropropane (R-227ea), 1,1,1,2,3,3-hexafluoropropane (R-236ea), 1,1,1,3,3,3-hexafluoropropane (R-236fa), 1,1,1,3,3-pentafluoropropane (R-245fa), and 1,1,1,3,3-pentafluorobutane (R-365mfc). including at least one, Air conditioning system for heating control.
  14. In Paragraph 11, The above hydrofluoroolefin (HFO)-based refrigerant comprises at least one of 1,1,2-trifluoroethylene (R-1123), 1-chloro-2,3,3,3-tetrafluoropropene (R1224yd(Z)), 2,3,3,3-tetrafluoropropene (R-1234yf), 1,3,3,3-tetrafluoropropene (R-1234ze), 1,2,3,3-tetrafluoropropene (R-1234ye), 3,3,3-trifluoropropene (R-1243zf), 1,1-difluoroethylene (R-1132a), and 1,2,3,3,3-pentafluoropropene (R-1225ye). Air conditioning system for heating control.
  15. In Paragraph 11, The above hydrochlorofluorocarbon (HCFC)-based refrigerant comprises at least one of difluorochloromethane (R-22), chlorotetrafluoroethane (R-124), and 1-chloro-1,1-difluoroethane (R-142b). Air conditioning system for heating control.
  16. In Paragraph 11, The above hydrocarbon refrigerant, which is not a natural refrigerant, comprises at least one of propylene (R-1270), isobutane (R-600a), dimethyl ether, isopentane, and pentane. Air conditioning system for heating control.
  17. In Paragraph 11, The above-mentioned halon or perfluorocarbon (PFC) refrigerant comprises at least one of trifluoroiodomethane (R-13I1), octafluoropropane (R-218), and octafluorocyclobutane (RC318). Air conditioning system for heating control.
  18. In Paragraph 11, battery; A waste heat exchanger for heat transfer between the battery and the heating tank; and A processing unit further comprising: heating the second refrigerant using heat generated from the battery during charging of the battery, circulating the first refrigerant and the second refrigerant when the operation of a heating mode is determined according to user input after starting the electric vehicle, and processing to supply air heated using the first refrigerant to the interior of the electric vehicle or to supply air heated using the second refrigerant to the interior based on the temperature of the first refrigerant. Air conditioning system for heating control.
  19. In Paragraph 18, The above processing unit is, When the temperature of the second refrigerant is below a preset first temperature, the second refrigerant is heated using a heating electronic element. Air conditioning system for heating control.
  20. In Paragraph 18, The above processing unit is, When the temperature of the first refrigerant is lower than or equal to the second temperature, air passing through the heat exchanger of the auxiliary heating unit is supplied to the room, or When the temperature of the first refrigerant exceeds the second temperature, the operation of the auxiliary heating unit is stopped, and air passing through the heater core of the main heating unit is supplied to the room. Air conditioning system for heating control.

Description

Method for Heating Control and the Air Conditioning System Thereof The present disclosure relates to a heating control method for an electric vehicle and an air conditioning system thereof. Automotive HVAC (heating ventilation, and air conditioning) systems are configured to heat and cool the air within the passenger cabin for passenger comfort. Additionally, some HVAC systems are configured to selectively change the air supply source. Furthermore, some HVAC systems are configured to draw in a mixture of outside and inside air, condition the mixture, and then supply the conditioned mixture into the passenger cabin. A vehicle air conditioning system includes a condenser and a heat core disposed within an air conditioning casing. The air conditioning casing has an inlet for air intake and a plurality of outlets for exhausting air into the passenger compartment. When cooling the indoor temperature, the condenser introduces cooled air into the passenger compartment by exchanging heat with air blown by a cooling fan, and when heating the indoor temperature, the heat core introduces heated air into the passenger compartment by exchanging heat with air provided by a blower fan. Since electric vehicles rely on battery power for most of the heating or cooling of their air conditioning systems, operating the heating or cooling functions causes a rapid increase in battery consumption, which may result in performance degradation or a reduction in the expected driving range. In particular, when there is a significant difference between the target temperature and the actual temperature upon starting the vehicle, the heating or cooling system consumes more battery power to quickly adjust, resulting in higher initial battery drain, a shorter driving range, and faster charging cycles, which causes inconvenience to the driver. FIG. 1 schematically illustrates components for heating control of an air conditioning system according to one embodiment of the present disclosure. FIG. 2 schematically illustrates the configuration of a heating unit for heating control and the flow of air passing through the heating unit in an air conditioning system according to one embodiment of the present disclosure. FIG. 3 illustrates the detailed configuration of a heating unit for heating control in an air conditioning system according to one embodiment of the present disclosure and the operation of the heating unit based thereon. FIG. 4 illustrates the flow of operation for performing heating control of a vehicle in an air conditioning system according to one embodiment of the present disclosure. FIG. 5 illustrates a detailed flow of operation for performing heating control of a vehicle in an air conditioning system according to one embodiment of the present disclosure. Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The advantages and features of the present disclosure and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below but may be implemented in various different forms. The embodiments are provided to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention will be defined by the scope of the claims. In the following, the same reference numerals refer to the same components. In describing various embodiments of the present disclosure, terms such as first, second, etc. are used to describe various elements, components, and/or sections, but these elements, components, and/or sections are not limited by these terms. These terms are used merely to distinguish one element, component, or section from another. Accordingly, the first element, first component, or first section mentioned below may be a second element, second component, or second section within the technical scope of the present invention. The terms used herein are for describing embodiments and are not intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. As used herein, "comprises" and/or "made of" do not exclude the presence or addition of one or more other components, steps, actions, and/or elements to the mentioned components, steps, actions, and/or elements. Unless otherwise defined, all terms used in this specification (including technical and scientific terms) may be used in a meaning commonly understood by those skilled in the art to which the present invention pertains. Additionally, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise. Preferred embodiments of the present disclosure are described below with reference to