Heat pump system for vehicle and method of controlling the same

Patent metadata

Field	Value
Publication number	US-2016116192-A1
Application number	US-201514986162-A
Country	US
Kind code	A1
Filing date	Dec 31, 2015
Priority date	Sep 7, 2012
Publication date	Apr 28, 2016
Grant date	—

Abstract

A heat pump system for a vehicle may include a cooling apparatus that supplies and circulates coolant to a motor and an electrical equipment through a cooling line, wherein the cooling apparatus includes a radiator, a cooling fan that ventilates wind to the radiator, and a water pump connected to the cooling line, and an air conditioner apparatus connected through a refrigerant line, wherein the air conditioner apparatus includes a water-cooled condenser connected to the cooling line to change a temperature of the coolant using a waste heat that has occurred in the motor and the electrical equipment according to each mode of the vehicle and that is connected to the refrigerant line to enable an injected refrigerant in the refrigerant line to exchange a heat with the coolant at the inside thereof, and an air-cooled condenser connected in series to the water-cooled condenser through the refrigerant line.

First claim

1 . A heat pump system for a vehicle, comprising:
a cooling apparatus that supplies and circulates coolant to a motor and an electrical equipment through a cooling line, wherein the cooling apparatus includes:
a radiator that cools the supplied coolant through heat exchange with outdoor air;
a cooling fan that ventilates wind to the radiator; and
a water pump that is connected to the cooling line and circulates the coolant along the cooling line; and
an air conditioner apparatus that is connected through a refrigerant line in order to adjust heating and air conditioning of vehicle indoors, wherein the air conditioner apparatus includes:
a water-cooled condenser that is connected to the cooling line to change a temperature of the coolant using a waste heat that has occurred in the motor and the electrical equipment according to each mode of the vehicle and that is connected to the refrigerant line to enable an injected refrigerant in the refrigerant line to exchange a heat with the coolant at the inside thereof;
an air-cooled condenser that is connected in series to the water-cooled condenser through the refrigerant line and that enables a refrigerant that is injected into the inside thereof to exchange a heat with the outdoor air; and wherein the air-cooled condenser has a plurality of switch films that selectively inject outdoor air at the front thereof.

2 . The heat pump system of claim 1 , wherein the air conditioner apparatus includes
a heating, ventilation, and air conditioning (HVAC) module having a switch door that selectively adjusts opening at the inside thereof in order to inject outdoor air having passed through an evaporator according to a heating mode, an air conditioning mode, and a dehumidification mode into an internal condenser and a positive temperature coefficient (PTC) heater; a compressor that is connected to the evaporator through the refrigerant line and that compresses a refrigerant of a gas state; an accumulator that is provided on the refrigerant line between the compressor and the evaporator and that supplies a gas refrigerant to the compressor; a first valve that selectively supplies a refrigerant that is exhausted from the compressor to the water-cooled condenser or the internal condenser according to a mode of the vehicle; a first expansion valve that receives and expands a refrigerant having passed through the internal condenser; a second valve that enables a refrigerant that is expanded through the first expansion valve to sequentially pass through the water-cooled condenser and the air-cooled condenser and that selectively supplies the refrigerant to the evaporator or the accumulator; and a second expansion valve that is provided between the evaporator and the second valve and that expands a refrigerant that is injected through switch of the second valve.

3 . (canceled)

4 . The heat pump system of claim 2 , wherein the first and second, and third valves are formed with a 3-way valve.

5 . The heat pump system of claim 1 , wherein the cooling apparatus and the air conditioner apparatus are operated by a control signal of a controller.

6 - 8 . (canceled)

9 . The heat pump system of claim 1 , wherein the switch film operates by a control signal of a controller, is closed in a heating mode, and is opened in an air conditioning mode and a dehumidification mode.

10 . A method of controlling a heat pump system for a vehicle having a cooling apparatus that is electrically connected to a controller and that is fluid-connected through a cooling line and that includes a radiator, a water pump, and an electrical equipment, and an air conditioner apparatus that is connected through a refrigerant line and that includes a heating, ventilation, and air conditioning (HVAC) module that is formed with a plurality of valves, an expansion valve, a compressor, an accumulator, an evaporator, an internal condenser, a positive temperature coefficient (PTC) heater, and a switch door, the method comprising:
operating the heat pump system, in a heating mode, an air conditioning mode, and a dehumidification mode according to a user's selection, wherein the heat pump system includes a water-cooled condenser that is connected to the cooling line and the refrigerant line and an air-cooled condenser that is disposed at the front of the radiator and connected to the refrigerant line, and changing a moving path of a refrigerant that circulates the air conditioner apparatus based on the heating mode, the air conditioning mode, and the dehumidification mode according to the user's selection, through operation of the each valve, such that a switch door of the HVAC module is selectively open and closed.

11 . The method of claim 10 , wherein:
in the heating mode, by the cooling apparatus,
raising a temperature of coolant that is injected into the water-cooled condenser through a waste heat that has occurred in the motor and the electrical equipment;
enabling the coolant to exchange a heat with a refrigerant that is injected into the water-cooled condenser through the refrigerant line;
injecting the refrigerant having passed through the water-cooled condenser into the air-cooled condenser; and
enabling the refrigerant to exchange a heat with a heat source of outdoor air; and
in the heating mode, by the air conditioner apparatus,
enabling a heated refrigerant through heat exchange with coolant and outdoor air in the water-cooled condenser and the air-cooled condenser;
supplying the refrigerant to the internal condenser of the HVAC module through operation of the first valve in a state that is compressed with a gas refrigerant of a high temperature and high pressure state by passing through the accumulator and the compressor along a refrigerant line through opening of the second valve;
sequentially supplying and circulating the refrigerant having passed through the internal condenser to the water-cooled condenser and the air-cooled condenser in a state that is expanded through the first expansion valve; and
opening the switch door so that outdoor air, having passed through the evaporator of the HVAC module from the outside passes through the internal condenser; and
enabling the injected outdoor air to heat vehicle indoors together with a selective operation of the PTC heater while passing through the internal condenser.

12 . The method of claim 10 , wherein in the air conditioning mode,
cooling coolant that is injected into the radiator together with outdoor air by a cooling fan; and by the cooling apparatus:
lowering a temperature of a refrigerant by second heat exchange with outdoor air by injecting a refrigerant that has exchanged a heat with coolant while passing through the water-cooled condenser into the air-cooled condenser while cooling the electrical equipment and the motor by circulating the coolant along the cooling line in a state that is cooled through heat exchange with a refrigerant that is injected into the water-cooled condenser, and
by the air conditioner apparatus:
supplying an expanded refrigerant to the evaporator by operating the second valve so that a refrigerant of a low temperature that is cooled while passing through the air-cooled condenser injects into the second expansion valve that is connected to the evaporator of the HVAC module;
exhausting the refrigerant that is evaporated through heat exchange with outdoor air in the evaporator;
opening a refrigerant line that is connected to the water-cooled condenser through operation of the first valve and circulates the refrigerant in a state that is compressed while passing through the accumulator and the compressor; and
cooling the vehicle indoors by closing the switch door so that outdoor air that is cool

Assignees

• Hyundai Motor Co Ltd

Inventors

• Kim Jae Yeon

Classifications

• F25B49/02

  for compression type machines, plants or systems · CPC title

• F25B13/00 Primary

  Compression machines, plants or systems, with reversible cycle (defrosting cycles F25B47/02) · CPC title

• F25B41/39

  Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator · CPC title

• F25B41/20

  Disposition of valves, e.g. of on-off valves or flow control valves (expansion valves F25B41/31) · CPC title

• B60H3/00

  Other air-treating devices · CPC title