CN116215182A

CN116215182A - Heat pump system for vehicle

Info

Publication number: CN116215182A
Application number: CN202211107932.7A
Authority: CN
Inventors: 郑成斌
Original assignee: Hyundai Motor Co; Kia Corp
Current assignee: Hyundai Motor Co; Kia Corp
Priority date: 2021-12-06
Filing date: 2022-09-13
Publication date: 2023-06-06
Also published as: KR20230084934A; DE102022124096A1

Abstract

The present invention relates to a heat pump system for a vehicle, the heat pump system comprising: an electrical component cooling device including a radiator and a first water pump disposed in a first line, and circulating a coolant in the first line to cool at least one electrical component disposed in the first line; a battery cooling device including a second water pump and a battery module provided in the second line, and circulating a coolant in the battery module; an indoor heating device; an indoor cooling device; a centralized energy device; and a refrigerator connected to a refrigerant connection line connected to the refrigerant line, the refrigerator being provided in the fifth line, wherein a condenser included in the concentrated energy device is connected to the second line through a second valve to condense the refrigerant supplied through the refrigerant line by heat exchange with the coolant, and the condenser is provided in a sixth line through which the coolant flows, a first end of the third line being connected to a third valve provided in the sixth line.

Description

Heat pump system for vehicle

Cross Reference to Related Applications

The present application claims priority from korean patent application No. 10-2021-0173118 filed at korean intellectual property office on 12 th month 2021, the disclosure of which is incorporated herein by reference for all purposes.

Technical Field

The present invention relates to a heat pump system for a vehicle. More particularly, the present invention relates to a heat pump system for a vehicle capable of controlling the temperature of a battery module by selectively using a refrigerator in which a refrigerant and a coolant exchange heat, and capable of cooling or heating the interior of the vehicle by selectively using a high-temperature coolant and a low-temperature coolant.

Background

Conventionally, an air conditioning system of a vehicle includes an air conditioning device for circulating a refrigerant to heat or cool an interior of the vehicle.

An air conditioning system, which can maintain a fresh indoor environment by maintaining an indoor temperature of a vehicle at an appropriate temperature regardless of a change in an outdoor temperature, is configured to heat or cool the interior of the vehicle by heat exchange between the condenser and the evaporator in a process of recirculating a refrigerant discharged by driving the compressor to the compressor through the condenser, the receiver drier, the expansion valve and the evaporator.

That is, in the air conditioning system, a high temperature and high pressure gas refrigerant compressed by a compressor is condensed by a condenser and then evaporated by an evaporator through a receiver dryer and an expansion valve to reduce indoor temperature and humidity in a summer cooling mode.

Recently, as concerns about energy efficiency and environmental pollution have increased, there has been a need to develop an environmentally friendly vehicle that substantially replaces an internal combustion engine vehicle, which is generally classified into an electric vehicle (typically driven using a fuel cell or electric power as a power source) and a hybrid vehicle (driven using an engine and a battery).

In the electric vehicle and the hybrid vehicle of the environment-friendly vehicle, a separate heater is not used, unlike the air conditioner of the ordinary vehicle, and the air conditioner applied to the environment-friendly vehicle is generally called a heat pump system.

In the case of an electric vehicle using a fuel cell, chemical reaction energy of oxygen and hydrogen is converted into electric energy to generate driving force, and in this process, heat energy is generated by chemical reaction in the fuel cell, and thus, it is necessary to effectively remove the generated heat to ensure performance of the fuel cell.

Even in the hybrid vehicle, the driving force is generated by driving the motor using electric power supplied from the fuel cell or battery and the engine driven by the ordinary fuel, and therefore, the performance of the motor can be ensured only by effectively removing heat generated from the fuel cell or battery and the motor.

Accordingly, in the related art hybrid vehicle or electric vehicle, the battery cooling system, the cooling portion, and the heat pump system may be configured to each have an independent circuit to prevent the motor, the electric components, and the battery including the fuel cell from generating heat.

Therefore, the size and weight of the cooling module provided at the front of the vehicle are increased, and the layout of the connection pipes for supplying the refrigerant or coolant to the heat pump system, the cooling device, and the battery cooling system in the engine compartment, respectively, becomes complicated.

Further, since a battery cooling system for heating or cooling a battery is separately provided according to the state of a vehicle so that the battery can be operated in an optimal state, a plurality of valves are applied to connect respective connection lines, whereby noise and vibration are transmitted to the inside of the vehicle, resulting in poor riding comfort.

Further, when heating the vehicle interior, the heating performance is lowered due to lack of a heat source, and the power consumption is increased due to use of an electric heater, and the power consumption of the compressor is increased.

The information contained in the background section of the invention is only for enhancement of understanding of the general background of the invention and is not to be taken as an acknowledgement or any form of suggestion that information forms the prior art that is known to a person skilled in the art.

Disclosure of Invention

Aspects of the present invention are directed to providing a heat pump system for a vehicle capable of controlling the temperature of a battery module by using a refrigerator (refrigerator) in which a coolant and a refrigerant exchange heat, and improving heating efficiency by recovering heat from various heat sources and using the heat for indoor heating in a heating mode of the vehicle.

Various aspects of the present invention are directed to a heat pump system for a vehicle, including: an electrical component cooling device including a radiator and a first water pump disposed in a first line, and circulating a coolant in the first line to cool at least one electrical component disposed in the first line; a battery cooling device including a second water pump and a battery module provided in the second line, and circulating a coolant in the battery module; an indoor heating device including a third water pump and a heater provided in a third line to heat the vehicle interior by using a high-temperature coolant; an indoor cooling device including a fourth water pump and a cooler connected to each other through a fourth line to cool the vehicle interior using a low-temperature coolant; a Concentrated Energy (CE) device in which heat energy generated during condensation and evaporation of a refrigerant circulating in a refrigerant line is exchanged with a introduced refrigerant to control a temperature of the refrigerant in order to supply a high-temperature coolant to an indoor heating device and a low-temperature coolant to the indoor cooling device; and a refrigerator connected to a refrigerant connection line connected to the refrigerant line, the refrigerator being provided in a fifth line connected to the first line and the second line through a first valve and a second valve, respectively, and controlling a temperature of the refrigerant by heat-exchanging the selectively introduced refrigerant with the refrigerant, wherein a condenser included in the concentrated energy device is connected to the second line through the second valve to condense the refrigerant supplied through the refrigerant line by heat-exchanging with the refrigerant, and is provided in a sixth line through which the refrigerant flows; and the first end of the third line is connected to a third valve provided in the sixth line.

The concentrated energy device includes: a first expansion valve connected to the condenser and the refrigerant line; an evaporator connected to the first expansion valve through a refrigerant line, connected to the fourth line, and evaporating the refrigerant through heat exchange between the refrigerant and the coolant while reducing the temperature of the coolant; a compressor disposed in a refrigerant line between the evaporator and the condenser; and an accumulator disposed in the refrigerant line between the evaporator and the compressor, wherein one end portion of the refrigerant connection line is connected to the refrigerant line between the condenser and the first expansion valve, and the other end portion of the refrigerant connection line is connected to the refrigerant line between the evaporator and the accumulator.

The first line is selectively connected to the sixth line through a first valve, the other end of the third line is connected to the sixth line at a position where the first line intersects the sixth line, and the first line connected to the radiator is connected to the third valve through a radiator connection line connecting the first line and the third valve.

A heat pump system for a vehicle, further comprising: a supply line, wherein a first end of the supply line is connected to the third line and a second end of the supply line is selectively connected to the second line through a fourth valve; a fifth valve disposed between the first line and the fifth line such that the fifth line connected to the refrigerator and the first line are selectively connected by an operation of the fifth valve; a bypass line selectively connecting the first line connected to the first water pump through operation of the fifth valve such that coolant circulates to the at least one electrical component without flowing through the radiator; a first branch line selectively connecting the first valve and the fourth valve; and a second branch line selectively connecting the fourth valve and the fifth valve.

When the battery module is cooled in the cooling mode of the vehicle, in the electric component cooling device, the first water pump is operated; closing the first branch line by operating the first valve and opening the first line connected to the sixth line; opening the sixth line and the radiator connection line by operating the third valve, and closing the third line; a coolant circulating through the radiator, the at least one electrical component, and the condenser along the open first line, a portion of the sixth line, and the radiator connecting line; in the battery cooling device, operating a second water pump; by operation of the second valve, the second line and the fifth line are connected, and a portion of the sixth line connected to the second valve is closed; closing the first branch line by operation of the first valve and the fourth valve; opening the second branch line by operation of the fourth valve and the fifth valve; the coolant having flowed through the battery module flows from the second line through the refrigerator along the fifth line, and then circulates along the opened second line, fifth line, and second branch line while flowing back to the second line through the second branch line; in a centralized energy device, each component operates such that refrigerant circulates along a refrigerant line; and in the indoor cooling device, the fourth water pump is operated such that the coolant circulates along a fourth line connecting the evaporator and the cooler to supply the cooler with the coolant that has flowed through the evaporator provided in the concentrated energy device.

When at least one of the electric component and the battery module is cooled by using the coolant cooled in the radiator in the cooling mode of the vehicle, the first water pump and the second water pump are operated in the electric component cooling device and the battery cooling device, respectively; a portion of the first line connecting the first valve and the sixth line is closed by operation of the first valve; by operation of the first valve, the fifth line is closed while the first branch line is open; by operation of the fourth valve, the second line connected to the battery module is connected to the first branch line, and the supply line is closed; opening the sixth line in a state where the fifth line is closed by the operation of the second valve; the radiator connection pipe is connected to the first pipe connected to the radiator in a state where the third pipe is closed by an operation of the third valve; the coolant cooled in the radiator passes through the at least one electric component, the battery module, and the condenser in order along the opened first line, the first branch line, the second line, the sixth line, and the radiator connection line to flow into the radiator; in a centralized energy device, each component operates such that refrigerant circulates along a refrigerant line; and in the indoor cooling device, the fourth water pump is operated so that the coolant circulates along the second connecting line connecting the evaporator and the cooler to supply the coolant, which has passed through the evaporator provided in the concentrated energy device, to the cooler.

When heat is recovered from an external heat source and the temperature of the battery module is raised in the heating mode of the vehicle, the first water pump and the second water pump are operated in the electric component cooling device and the battery cooling device, respectively; in the indoor heating device, operating a third water pump; the first line is connected to the fifth line and closes the first branch line by operation of the first valve; a portion of the first line connecting the first valve and the sixth line is closed by operation of the first valve; in a state where the bypass line is closed by the operation of the fifth valve, the first line connected to the radiator is opened, and the fifth line and the first line are connected; the coolant having passed through the at least one electrical component passes through the refrigerator along the opened first and fifth lines, and then recovers heat from the external air heat source while again passing through the radiator along the opened first line; the fifth line connected to the second valve is closed, and the second line is connected to the sixth line through the second valve by the operation of the second valve; opening the third line in a state where the radiator connection line is closed by the operation of the third valve; the supply line and the second line are connected by operation of a fourth valve; closing the second branch line by operation of the fourth valve and the fifth valve; the coolant having flowed through the battery module flows through the condenser along the opened second and sixth lines and is then supplied to the heater along the opened third line; the coolant having passed through the heater flows back to the condenser along the third line and the sixth line; some of the coolant that has passed through the condenser circulates while flowing back to the battery module along the open supply line and the second line; and in the concentrated energy device, each constituent element operates such that the refrigerant circulates along the refrigerant line.

When waste heat of at least one electric component is recovered and the temperature of the battery module is raised in the heating mode of the vehicle, operating the first water pump and the second water pump in the electric component cooling device and the battery cooling device, respectively; in the indoor heating device, operating a third water pump; by operation of the first valve, the first line is connected to the fifth line and closes the first branch line; a portion of the first line connecting the first valve and the sixth line is closed by operation of the first valve; opening the bypass line in a state where the first line connected to the radiator is closed by the operation of the fifth valve; the fifth line and the open bypass line are connected by operation of a fifth valve; the coolant having passed through the at least one electrical component flows through the refrigerator along the open first and fifth lines and is then heated by waste heat of the at least one electrical component while flowing through the at least one electrical component along the open bypass line without flowing through the radiator; the fifth line connected to the second valve is closed, and the second line is connected to the sixth line through the second valve by the operation of the second valve; in a state where the radiator connection line is closed by the operation of the third valve, the third line is opened; the supply line and the second line are connected by operation of a fourth valve; closing the second branch line by operation of the fourth valve and the fifth valve; the coolant having flowed through the battery module flows through the condenser along the opened second and sixth lines and is then supplied to the heater along the opened third line; the coolant having passed through the heater flows back to the condenser along the third line and the sixth line; some of the coolant that has passed through the condenser circulates while flowing back to the battery module along the open supply line and the second line; and in the concentrated energy device, each constituent element operates such that the refrigerant circulates along the refrigerant line.

The refrigerator increases the temperature of the coolant by heat exchanging the coolant and the refrigerant to recover waste heat from the coolant that is heated while flowing through the at least one electrical component.

When heat is recovered from an external heat source and waste heat of the battery module is recovered in a heating mode of the vehicle, a first water pump and a second water pump are operated in the electric component cooling device and the battery cooling device, respectively; in the indoor heating device, operating a third water pump; closing a fifth line connected to the first line and opening the first branch line by operation of the first valve; a portion of the first line connecting the first valve and the sixth line is closed by operation of the first valve; by operation of the fourth valve, the second line connected to the battery module is connected to the first branch line, and the supply line is closed; the second line is connected to the fifth line, and a portion of the sixth line connected to the second line is closed by operation of the second valve; in a state where the bypass line is closed by operating the fifth valve, the first line connected to the radiator is opened, and the fifth line and the first line are connected; closing the second branch line by operation of the fourth valve and the fifth valve; the coolant having flowed through the at least one electric component flows through the battery module and the refrigerator in this order along the opened first line, the first branch line, the second line, and the fifth line, and then recovers heat from the heat source of the external air while flowing through the radiator again along the opened first line; in a state where the radiator connection line is closed by the operation of the third valve, the third line is opened; the coolant flowing through the condenser along the opened sixth line is supplied to the heater along the third line; the coolant having passed through the heater circulates while flowing back to the condenser along the third line and the opened sixth line; and in the concentrated energy device, each constituent element operates such that the refrigerant circulates along the refrigerant line.

When waste heat of at least one electric component and a battery module is recovered in a heating mode of a vehicle, operating a first water pump and a second water pump in an electric component cooling device and a battery cooling device, respectively; in the indoor heating device, operating a third water pump; closing a fifth line connected to the first line and opening the first branch line by operation of the first valve; a portion of the first line connecting the first valve and the sixth line is closed by operation of the first valve; by operation of the fourth valve, the second line connected to the battery module is connected to the first branch line, and the supply line is closed; the second line is connected to the fifth line, and a portion of the sixth line connected to the second line is closed by operation of the second valve; in a state where the first line connected to the radiator is closed by the operation of the fifth valve, the bypass line is opened; the fifth line and the open bypass line are connected by operation of a fifth valve; the second branch line is closed by the operation of the fourth valve and the fifth valve; the coolant having flowed through the at least one electrical component flows through the refrigerator along the opened first line, the first branch line, the second line, and the fifth line, and is then heated by waste heat of the at least one electrical component and the battery module while flowing through the at least one electrical component and the battery module along the opened bypass line without flowing through the radiator; in a state where the radiator connection line is closed by the operation of the third valve, the third line is opened; the coolant having flowed through the condenser along the opened sixth line is supplied to the heater along the third line; the coolant having passed through the heater circulates while flowing back to the condenser along the third line and the opened sixth line; and in the concentrated energy device, each constituent element operates such that the refrigerant circulates along the refrigerant line.

The first, fourth and fifth valves are four-way valves, and the second and third valves are three-way valves.

At the front end portion of the refrigerator, a refrigerant connection line is provided with a second expansion valve to control the flow rate of the refrigerant flowing into the refrigerator and selectively expand the refrigerant.

When the battery module is cooled using the coolant after heat exchange with the refrigerant, or when waste heat from at least one electrical component and the battery module is selectively recovered, the second expansion valve expands the refrigerant flowing into the refrigerant connection line to flow the refrigerant into the refrigerator.

The first expansion valve and the second expansion valve are electronic expansion valves that selectively expand the refrigerant while controlling the flow rate of the refrigerant.

When dehumidification is required in the heating mode of the vehicle, a fourth water pump provided in the indoor cooling device is operated, and the refrigerant is supplied to an evaporator in the concentrated energy device.

The indoor heating device further includes a coolant heater disposed in a third line between the third valve and the third water pump.

The coolant heater is operated when the temperature of the coolant supplied to the heater is lower than the target temperature in the heating mode of the vehicle or when the battery module is heated.

The refrigerator recovers waste heat generated from at least one electrical component or the battery module according to a cooling mode or a heating mode of the vehicle, or controls the temperature of the battery module.

As described above, according to the heat pump system for a vehicle of the exemplary embodiment of the present invention, simplification of the system can be achieved by using one refrigerator (in which a refrigerant and a coolant exchange heat) in an electric vehicle to control the temperature of a battery module according to a vehicle mode.

Further, according to an exemplary embodiment of the present invention, heating efficiency may be improved by selectively recovering waste heat generated from an external heat source, an electrical component, or a battery module to use it for indoor heating in a vehicle heating mode.

Further, according to an exemplary embodiment of the present invention, by selectively exchanging heat energy generated during condensation and evaporation of a refrigerant with a coolant, and by controlling an indoor temperature of a vehicle using low-temperature or high-temperature coolant after heat exchange, respectively, a system can be simplified and a layout of connection pipes through which the refrigerant circulates can be simplified.

Further, according to the exemplary embodiments of the present invention, by effectively controlling the temperature of the battery module, the battery module can be operated with optimal performance, and the total mileage of the vehicle can be increased by effectively managing the battery module.

Further, according to the exemplary embodiment of the present invention, by modularizing the concentrated energy apparatus generating heat energy by condensation and evaporation of the refrigerant, and by using the high-performance refrigerant, the size and weight thereof can be reduced, and noise, vibration, and various operational instabilities can be further prevented as compared to the conventional air conditioner.

Further, according to an exemplary embodiment of the present invention, by using a coolant heater applied to an indoor heating device, the coolant heater may be used as an auxiliary device for indoor heating, thereby reducing cost and weight.

Further, according to exemplary embodiments of the present invention, it is possible to reduce manufacturing costs and weight and improve space utilization by simplifying the entire system.

The method and apparatus of the present invention have other features and advantages which will be apparent from or are set forth in more detail in the accompanying drawings, the following detailed description of which, together with the drawings, serve to explain certain principles of the invention.

Drawings

Fig. 1 is a block diagram illustrating a heat pump system for a vehicle according to various exemplary embodiments of the present invention;

fig. 2 is a view showing an operation state during cooling of a battery module based on a cooling mode in a heat pump system for a vehicle according to various exemplary embodiments of the present invention;

Fig. 3 illustrates an operation state diagram of cooling electric components and a battery module using a coolant in a cooling mode in a heat pump system for a vehicle according to various exemplary embodiments of the present invention;

fig. 4 illustrates an operation state diagram for recovering heat from an external heat source and increasing the temperature of a battery module based on a heating mode in a heat pump system for a vehicle according to various exemplary embodiments of the present invention;

fig. 5 illustrates an operation state diagram for recovering waste heat from an electrical component and raising a temperature of a battery module based on a heating mode in a heat pump system for a vehicle according to various exemplary embodiments of the present invention;

fig. 6 illustrates an operation state diagram of an external heat source and recovering waste heat from a battery module based on a heating mode in a heat pump system for a vehicle according to various exemplary embodiments of the present invention;

fig. 7 illustrates an operation state diagram for recovering waste heat from an electrical component and a battery module based on a heating mode in a heat pump system for a vehicle according to various exemplary embodiments of the present invention.

It should be understood that the drawings are not necessarily to scale, presenting a simplified representation of various features illustrative of the basic principles of the invention. The specific design features of the invention, including, for example, specific dimensions, orientations, locations, and shapes, included herein will be determined in part by the particular intended application and use environment.

In the drawings, reference numerals designate identical or equivalent parts of the present invention.

Detailed Description

Reference will now be made in detail to various embodiments of the invention, examples of which are illustrated in the accompanying drawings and described below. While the invention will be described in conjunction with the exemplary embodiments thereof, it will be understood that the present description is not intended to limit the invention to the exemplary embodiments of the invention. On the other hand, the invention is intended to cover not only the exemplary embodiments of the invention, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.

Since the exemplary embodiments described in the specification and the configurations shown in the drawings are only the most preferable embodiments and configurations of the present invention, they do not represent all technical ideas of the present invention, and it is understood that various equivalents and modified examples may be used instead of the embodiments when the present application is filed.

For clarity of description of the present invention, parts irrelevant to the description are omitted, and the same or similar constituent elements are denoted by the same reference numerals throughout the specification.

Since the size and thickness of each configuration shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to the configuration shown in the drawings, and enlarged thicknesses are shown for clarity of illustration of the various parts and regions.

Furthermore, throughout the specification, unless explicitly described to the contrary, the word "comprise" and variations such as "comprises" or "comprising" will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.

Further, components such as "… … unit," "… … device," "… … portion," and "… … component" refer to an integrated configuration that includes at least one function or operation.

Fig. 1 illustrates a block diagram of a heat pump system for a vehicle according to various exemplary embodiments of the present invention.

According to various exemplary embodiments of the present invention, the heat pump system 100 for a vehicle selectively utilizes a refrigerator (refrigerator) 160 in which a refrigerant and a coolant are heat-exchanged to control the temperature of the battery module 122, and selectively utilizes a high-temperature coolant and a low-temperature coolant to cool or heat the interior of the vehicle.

Referring to fig. 1, a heat pump system 100 according to an exemplary embodiment of the present invention includes: an electrical component cooling device 110, a battery cooling device 120, an indoor heating device 140, an indoor cooling device 170, a concentrated energy device 150 (hereinafter referred to as CE device), and a refrigerator 160.

First, the electric component cooling device 110 includes a radiator 112 and a first water pump 114 provided in a first line 111.

The radiator 112 is provided at the front of the vehicle, and the cooling fan is provided at the rear of the vehicle so that the coolant is cooled by the operation of the cooling fan and heat exchange with outside air.

The electrical component cooling device 110 may circulate the coolant in the first line 111 by operation of the first water pump 114 to cool at least one electrical component 116 disposed in the first line 111.

Here, the electrical component 116 may include one of a drive motor, a power control device, an inverter, an on-board charger (OBC), a controller, and an autonomous drive controller.

The drive motor, power control, inverter, controller, and autonomous drive controller may be configured to generate heat when driving, and the OBC may generate heat when charging the battery module 122.

The electric component cooling apparatus 110 configured as described above circulates the coolant cooled by the radiator 112 along the first line 111 by the operation of the first water pump 114, thereby cooling the electric component 116 from overheating.

In an exemplary embodiment of the present invention, the battery cooling device 120 may include a battery module 122 and a second water pump 124 disposed in the second line 121.

The battery cooling device 120 configured as described above may control the temperature of the battery module 122 by circulating coolant in the battery module 122 by the operation of the second water pump 124.

In an exemplary embodiment of the present invention, the indoor heating device 140 may include a third water pump 142 and a heater 144 provided in a third line 141 to heat the vehicle interior using a high temperature coolant.

When the vehicle interior is heated, the indoor heating device 140 as described above may circulate the high-temperature coolant in the third line 141 by the operation of the third water pump 142, thereby supplying the high-temperature coolant to the heater 144.

Accordingly, the high temperature coolant may be supplied to the heater 144 along the third line 141.

That is, the indoor heating device 140 may heat the vehicle interior by operating the third water pump 142 to supply the high temperature coolant to the heater 144 in the vehicle heating mode.

Meanwhile, the heater 144 may be disposed in a heating, ventilation and air conditioning (HVAC) module.

Here, a coolant heater 146 may be provided between a third valve V3 (described later) in the third line 141 and the third water pump 142, the coolant heater 146 being for selectively heating the coolant circulated in the third line 141.

When the temperature of the coolant supplied to the heater 144 is lower than the target temperature in the vehicle heating mode, the coolant heater 146 is turned on to heat the coolant circulating in the third line 141, and the coolant including the temperature increase may be introduced into the heater 144.

Further, even when the temperature of the battery module 122 increases, the coolant heater 146 may be selectively operated.

The coolant heater 146 may be an electric heater that operates based on a power supply.

Meanwhile, in the exemplary embodiment of the present invention, as an example, the coolant heater 146 is provided in the third line 141, but the present invention is not limited thereto, and an air heater for raising the temperature of the outside air flowing into the vehicle interior may be applied instead of the coolant heater 146.

An air heater may be provided in the HVAC module rearward of the heater 144 toward the vehicle interior to selectively heat the outside air flowing through the heater 144.

The indoor heating device 140 configured as described above may supply the high-temperature coolant to the heater 144 to heat the vehicle interior by operating the third water pump 142 in the vehicle heating mode.

In an exemplary embodiment of the present invention, the indoor cooling device 170 may include a fourth water pump 172 and a cooler 174 interconnected by a fourth line 171 to cool the vehicle interior using a low-temperature coolant.

The fourth line 171 may be connected to an evaporator 156 provided in the centralized energy device 150.

The indoor cooling apparatus 170 configured as described above supplies the coolant, the temperature of which has been reduced, to the cooler 174 by operating the fourth water pump 172 while circulating in the fourth line 171 in the vehicle cooling mode to cool the vehicle interior.

Here, the chiller 174 may be installed within the HVAC module.

On the other hand, an HVAC module is provided between the heater 144 and the cooler 174, and a door is provided therein for controlling the external air flowing through the cooler 174 to selectively flow into the heater 144 according to the cooling, heating and dehumidifying modes of the vehicle.

That is, the door is opened in the heating mode of the vehicle, and the outdoor air having passed through the cooler 174 is caused to flow into the heater 144. In contrast, in the cooling mode of the vehicle, the door closes the heater 144 side, so that the outdoor air cooled while flowing through the cooler 174 directly flows into the vehicle.

In an exemplary embodiment of the present invention, the concentrated energy device 150 (hereinafter, referred to as a CE device) may be connected to the indoor heating apparatus 140 and may be connected to the fourth pipeline 171 to supply high temperature cooling water to the indoor heating apparatus 140 and supply low temperature cooling water to the indoor cooling device 170.

CE device 150 may exchange heat energy generated during condensation and evaporation of the refrigerant circulating in refrigerant line 151 with each of the provided coolants.

The refrigerant may be a high performance R152-a, R744 or R290 refrigerant.

That is, the high temperature coolant is supplied to the heater 144 through the third line 141, and the low temperature coolant is supplied to the cooler 174 through the fourth line 171.

Here, the CE apparatus 150 includes a condenser 153, a first expansion valve 155, an evaporator 156, an accumulator (accumulator) 157, and a compressor 159, which are connected through a refrigerant line 151.

First, the refrigerant circulates in the condenser 153, and the condenser 153 may be disposed in the sixth line 131, and the sixth line 131 is selectively connected to the first line 111 or the second line 121.

That is, the condenser 153 may exchange heat of the coolant introduced through the sixth line 131 with the refrigerant to condense the refrigerant.

The first expansion valve 155 may be connected to the condenser 153 through a refrigerant line 151. The first expansion valve 155 is supplied with the refrigerant having passed through the condenser 153 to expand it.

The evaporator 156 is connected to a first expansion valve 155 through a refrigerant line 151. The evaporator 156 may be connected to the fourth line 171 to cool the coolant circulated in the fourth line 171 in the indoor cooling device 170.

The evaporator 156 configured as described above can evaporate the refrigerant by heat exchange with the refrigerant, and at the same time can reduce the temperature of the refrigerant.

Here, the coolant circulated in the indoor cooling device 170 may be supplied to the evaporator 156 along the fourth line 171 such that the evaporator 156 evaporates the refrigerant through heat exchange with the coolant.

Therefore, in the vehicle cooling mode, the evaporator 156 can cool the coolant circulating in the fourth line 171 by heat exchange with the low-temperature refrigerant evaporated therein, and can supply the low-temperature coolant to the cooler 174 through the fourth line 171.

Further, a compressor 159 is disposed in the refrigerant line 151 between the evaporator 156 and the condenser 153. The compressor 159 may compress gaseous refrigerant discharged from the evaporator 156 and supply the compressed refrigerant to the condenser 153.

Meanwhile, an accumulator 157 is disposed in the refrigerant line 151 between the evaporator 156 and the compressor 159.

The accumulator 157 increases the efficiency and durability of the compressor 159 by supplying only gaseous refrigerant to the compressor 159.

Further, the refrigerator 160 is connected to the concentrated energy device 150 through a refrigerant connection pipe 163 so that the coolant is selectively circulated.

Further, a refrigerator 160 may be provided in the fifth line 161, connected to the first line 111 and the second line 121 through a first valve V1 and a second valve V2, respectively.

Accordingly, the refrigerator 160 may adjust the temperature of the coolant by exchanging heat of the coolant selectively flowing therein with the coolant.

That is, the refrigerator 160 may recover waste heat generated from the electrical components 116 or the battery module 122, or adjust the temperature of the battery module 122, according to a cooling mode or a heating mode of the vehicle.

Meanwhile, one end of the refrigerant connection line 163 may be connected to the refrigerant line 151 connecting the condenser 153 and the first expansion valve 155.

Further, the other end of the refrigerant connection line 163 may be connected to the refrigerant line 151 between the evaporator 156 and the accumulator 157.

Here, in the refrigerant connection line 163 at the front end portion of the refrigerator 160, a second expansion valve 165 is provided to control the flow rate of the refrigerant flowing into the refrigerator 160 and selectively expand the refrigerant.

When the battery module 122 is cooled using the coolant heat-exchanged with the refrigerant or the waste heat from the electric components 116 and the battery module 122 is selectively recovered, the second expansion valve 165 may expand the refrigerant flowing into the refrigerant connection line 163 to flow into the refrigerator 160.

The second expansion valve 165 expands the condensed refrigerant discharged from the condenser 153 so that it flows into the refrigerator 160 in a state where the temperature thereof is reduced, so that the temperature of the coolant flowing through the inside of the refrigerator 160 is further reduced.

That is, when the refrigerator 160 cools the battery module 122 using the coolant heat-exchanged with the refrigerant, the refrigerator 160 may use the supplied low-temperature refrigerant to reduce the temperature of the coolant flowing through the inside of the refrigerator 160.

Thus, the coolant, which has a reduced temperature while flowing through the refrigerator 160, may flow into the battery module 122 to be more effectively cooled.

Meanwhile, when dehumidification is required in the heating mode of the vehicle, the fourth water pump 172 provided in the indoor cooling device 170 may be operated, and the refrigerant expanded by the operation of the first expansion valve 155 may be supplied to the evaporator 156.

Accordingly, the cooler 174 is supplied with the low-temperature coolant that has heat-exchanged with the refrigerant in the evaporator 156, so that indoor dehumidification can be performed.

In the CE device 150 configured as described above, the condenser 153, the evaporator 156, and the refrigerator 160 may be water-cooled heat exchangers into which the coolant flows.

Further, the first expansion valve 155 and the second expansion valve 165 may be electronic expansion valves to selectively expand the refrigerant while controlling the flow rate of the refrigerant.

Meanwhile, in an exemplary embodiment of the present invention, the condenser 153 may be disposed in the sixth line 131, and the sixth line 131 includes one end connected to the second valve V2.

Further, the first line 111 may be selectively connected to the sixth line 131 through a first valve V1.

In an exemplary embodiment of the present invention, one end of the third line 141 may be connected to a third valve V3 provided in the sixth line 131. Further, the other end portion of the third line 141 may be connected to the sixth line 131 at a position where the first line 111 and the sixth line 131 cross each other.

Therefore, coolant may be introduced into the third line 141 by operating the third valve V3 in the vehicle heating mode.

Further, the first line 111 connected to the radiator 112 may be connected to the third valve V3 through the radiator connection line 117.

Meanwhile, the heat pump system 100 may further include a bypass line 118, a supply line 133, a fifth valve V5, a first branch line 135, and a second branch line 137.

First, the bypass line 118 may selectively connect the first line 111 to the first water pump 114 by the operation of the fifth valve V5 provided in the first line 111 at the front end portion of the radiator 112 based on the flow direction of the coolant, so that the coolant having flowed through the electrical component 116 is circulated back to the electrical component 116 without passing through the radiator 112.

That is, when the coolant temperature increases by absorbing waste heat generated by the electrical component 116, the bypass line 118 may be selectively opened by operating the fifth valve V5.

One end of the supply line 133 is connected to one end of the third line 141. Further, the other end of the supply line 133 may be connected to the second line 121 through a fourth valve V4.

The fifth valve V5 may selectively connect the fifth line 161 and the first line 111 connected to the rear end portion of the refrigerator 160 based on the flow direction of the coolant.

In an exemplary embodiment of the present invention, the first branch line 135 may connect the first valve V1 and the fourth valve V4. In addition, the second branch 137 may connect the fourth valve V4 and the fifth valve V5.

The first branch line 135 and the second branch line 137 may be selectively opened or closed by operating the first, fourth, and fifth valves V1, V4, and V5 based on a cooling or heating mode of the vehicle.

Here, the first, fourth and fifth valves V1, V4 and V5 may be four-way valves, and the second and third valves V2 and V3 may be three-way valves.

Hereinafter, the operation and action of the heat pump system for a vehicle according to an exemplary embodiment of the present invention will be described in detail with reference to fig. 2 to 7.

First, an operation when cooling a battery module based on a vehicle cooling mode in a heat pump system for a vehicle according to an exemplary embodiment of the present invention will be described with reference to fig. 2.

Fig. 2 shows an operation state diagram when the battery module is cooled according to a cooling mode in the heat pump system for a vehicle according to the exemplary embodiment of the present invention.

Referring to fig. 2, when the battery module 122 is cooled in the vehicle cooling mode, coolant is circulated in the first line 111 by the operation of the first water pump 114 in the electric component cooling device 110.

Here, the first line 111 connected to the sixth line 131 may be opened by the operation of the first valve V1.

Further, the sixth line 131 and the radiator connecting line 117 are opened by the operation of the third valve V3. In this case, the third line 141 may be closed by the operation of the third valve V3.

Accordingly, coolant may circulate in the radiator 112, the electrical component 116, and the condenser 153 along the open first line 111, a portion of the sixth line 131, and the radiator connection line 117.

That is, the coolant cooled by the radiator 112 may cool the electrical components 116, and may exchange heat with the refrigerant supplied to the condenser 153.

Further, in the battery cooling device 120, the coolant circulates in the battery coolant line 121 by the operation of the second water pump 124.

Here, the second line 121 and the fifth line 161 are connected by the operation of the second valve V2. Further, a portion of the sixth line 131 connected to the second valve V2 may be closed.

Further, the first branch line 135 may be closed by the operation of the first valve V1 and the fourth valve V4. The second branch 137 is openable by operation of the fourth valve V4 and the fifth valve V5.

In this case, the supply line 133 may be closed by the operation of the fourth valve, and the bypass line 118 and a portion of the first line 111 connected to the fifth valve may be closed.

Accordingly, the coolant that has flowed through the battery module 122 flows from the second line 121 through the refrigerator 160 along the fifth line 161. Thus, while coolant that has flowed through the chiller 160 again flows into the second line 121 through the second branch line 137, it can circulate along the open second line 121, fifth line 161, and second branch line 137.

Here, in the CE device 150, the respective constituent elements operate such that the refrigerant may circulate along the refrigerant line 151 to heat the vehicle interior.

In this case, the first expansion valve 155 and the second expansion valve 165 may expand the refrigerant having passed through the condenser 153 to supply it to the evaporator 156 and the refrigerator 160, respectively.

Accordingly, the coolant supplied through the fifth line 161 is cooled by heat exchange with the low temperature refrigerant supplied to the refrigerator 160.

The cooled coolant may effectively cool the battery module 122 while circulating along the fifth line 161, the second branch line 137, and the second line 121.

Meanwhile, in the indoor cooling device 170, the fourth water pump 172 may be operated so that the coolant may circulate along the fourth line 171 connecting the evaporator 156 and the cooler 174 to supply the cooler 174 with the coolant having passed through the evaporator 156.

Here, the external air flowing into the HVAC module is cooled by the low-temperature coolant flowing into the cooler 174 while flowing through the cooler 174.

In this case, the door closes the portion flowing through the heater 144 so that the cooled external air does not flow through the heater 144. Therefore, the cooled outside air can directly flow into the vehicle interior.

Accordingly, the indoor cooling device 170 supplies the coolant, which is circulated in the fourth line 171 in the vehicle cooling mode while the temperature is reduced, to the cooler 174 by operating the fourth water pump 172, thereby cooling the vehicle interior.

In an exemplary embodiment of the present invention, an operation of cooling the electric components 116 and the battery module 122 using the coolant cooled by the radiator 112 in the vehicle cooling mode will be described with reference to fig. 3.

Fig. 3 illustrates an operation state diagram of cooling electric components and a battery module using a coolant in a cooling mode in a heat pump system for a vehicle according to various exemplary embodiments of the present invention.

Referring to fig. 3, the heat pump system 100 may cool the electrical components 116 and the battery module 122 using coolant cooled by the radiator 112 in the vehicle cooling mode.

In the electric component cooling device 110 and the battery cooling device 120, the first water pump 114 and the second water pump 124 are operated, respectively.

Here, the first valve V1 and a portion of the first line 111 for connecting the sixth line 131 are closed by the operation of the first valve V1.

Further, the fifth line 161 is closed by the operation of the first valve V1, while the first branch line 135 is opened.

By the operation of the fourth valve V4, the second line 121 connected to the battery module 122 is connected to the first branch line 135, and the supply line 133 is closed.

In a state where the fifth line 161 is closed by the operation of the second valve V2, the sixth line 131 is opened.

Further, in a state where the third line 141 is closed by the operation of the third valve V3, the radiator connection line 117 is connected to the first line 111 connected to the radiator 112.

Accordingly, the coolant cooled in the radiator 112 may sequentially flow through the electric component 116, the battery module 122, and the condenser 153 along the opened first line 111, the first branch line 135, the second line 121, the sixth line 131, and the radiator, thereby flowing into the radiator 112.

That is, the coolant cooled in the radiator 112 may circulate along the first line 111, the first branch line 135, and the second line 121 to cool the electrical components 116 and the battery module 122.

Accordingly, the coolant may exchange heat with the refrigerant supplied to the condenser 153 while flowing through the condenser 153 along the sixth line 131.

Here, in the CE device 150, the respective constituent elements operate such that the refrigerant may circulate along the refrigerant line 151 to cool the vehicle interior.

In this case, the first expansion valve 155 expands the refrigerant having passed through the condenser 153 to supply it to the evaporator 156, while the second expansion valve 165 is not operated. Therefore, the supply of the refrigerant to the refrigerator 160 is stopped.

Accordingly, the coolant cooled in the radiator 112 circulates along the first and

second lines

111 and 121 to effectively cool the electrical components 116 and the battery module 122.

Meanwhile, in the indoor cooling device 170, the fourth water pump 172 may be operated so that the coolant may circulate along the fourth line 171 connecting the evaporator 156 and the cooler 174 to supply the coolant having passed through the evaporator 156 to the cooler 174.

In this case, the door closes the portion flowing through the heater 144 so that the cooled external air does not flow through the heater 144. Thus, the cooled outside air can directly flow into the vehicle interior.

Accordingly, the indoor cooling device 170 supplies the coolant, the temperature of which is lowered while circulating in the fourth line 171 in the vehicle cooling mode, to the cooler 174 by the operation of the fourth water pump 172 to cool the vehicle interior.

In an exemplary embodiment of the present invention, an operation of recovering heat from an external heat source and raising the temperature of the battery module 122 in the vehicle heating mode will be described with reference to fig. 4.

Fig. 4 illustrates an operation state diagram for recovering heat from an external heat source and increasing the temperature of a battery module based on a heating mode in a heat pump system for a vehicle according to various exemplary embodiments of the present invention.

Referring to fig. 4, the heat pump system 100 may recover heat from an external heat source in a vehicle heating mode, use it for indoor heating, and may raise the temperature of the battery module 122.

In the present embodiment, in the electric component cooling device 110 and the battery cooling device 120, the first water pump 114 and the second water pump 124 are operated, respectively.

Further, in the indoor heating device 140, the third water pump 142 is operated.

First, the first line 111 is connected to the fifth line 161 by the operation of the first valve V1. At the same time, the first leg 135 is closed.

Further, a portion of the first line 111 connecting the first valve V1 and the sixth line 131 is closed by the operation of the first valve V1.

In a state where the bypass line 118 is closed by the operation of the fifth valve V5, the first line 111 connected to the radiator 112 is opened.

Further, the fifth line 161 may be connected to the first line 111 connected to the radiator 112 through the operation of the fifth valve V5.

Accordingly, the coolant flowing through the electric part 116 flows through the refrigerator 160 along the opened first and

fifth lines

111 and 161, and then it can recover heat of the heat source from the outside air while flowing through the radiator 112 again along the opened first line 111.

Meanwhile, a portion of the fifth line 161 connected to the second valve V2 is closed by the operation of the second valve V2, and the second line 121 is connected to the sixth line 131 by the operation of the second valve V2.

Further, the radiator connection line 117 is closed by the operation of the third valve V3, and at the same time, the third line 141 is opened.

Supply line 133 is connected to second line 121 by operation of fourth valve V4 and second branch 137 is closed by operation of fourth valve V4 and fifth valve V5.

Accordingly, the coolant having flowed through the battery module 122 flows through the condenser 153 along the opened second and

sixth lines

121 and 131, and is then supplied to the heater 144 along the opened third line 141.

Here, when the temperature of the coolant circulating along the third line 141 is lower than the target temperature, the coolant heater 146 is operated to heat the coolant circulating in the third line 141.

At the same time, the door is opened so that outside air flowing into the HVAC module to flow through the cooler 174 flows through the heater 144.

Therefore, the external air flowing in from the outside flows in a room temperature state in which it is not cooled when flowing through the cooler 174 to which the low-temperature coolant is not supplied. The flowing outside air is converted into a high temperature state while flowing through the heater 144 to flow into the vehicle interior so that the vehicle interior can be heated.

That is, the heat pump system 100 according to the exemplary embodiment absorbs heat of an external heat source from the radiator 112 to be used for indoor heating of a vehicle, reduces power consumption of the compressor 59, and improves heating efficiency.

Meanwhile, the coolant flowing through the heater 144 flows back to the condenser 153 along the third line 141 and the sixth line 131.

In addition, some of the coolant that has passed through the condenser 153 may circulate while flowing back to the battery module 122 along the opened supply line 133 and the second line 121.

Therefore, the coolant, the temperature of which has been raised while flowing through the heater 144 and the condenser 153, flows into the battery module 122, so that the temperature of the battery module 122 can be raised.

Meanwhile, in the CE device 150, the respective constituent elements operate so that the refrigerant may circulate along the refrigerant line 151 to heat the vehicle interior.

In this case, the first expansion valve 155 is not operated, and the second expansion valve 165 expands the refrigerant having passed through the condenser 153 to supply it to the refrigerator 160. Accordingly, the supply of refrigerant to the evaporator 156 is stopped.

Here, when it is necessary to dehumidify the interior of the vehicle while the vehicle is in the heating mode, the first expansion valve 155 operates to supply the expanded refrigerant to the evaporator 156.

At the same time, in the indoor cooling unit 170, the fourth water pump 172 is operated, and the coolant circulates along the fourth line 171.

The coolant circulated along the fourth line 171 may flow into the cooler 174 while being cooled by heat exchange with the refrigerant in the evaporator 156.

That is, the external air flowing into the HVAC module is dehumidified by the low-temperature coolant flowing into the cooler 174 while flowing through the cooler 174. Accordingly, while flowing through the heater 114, it is converted into a high temperature state to flow into the vehicle interior, heating and dehumidifying the vehicle interior.

In an exemplary embodiment of the present invention, an operation for recovering waste heat of the electric components 116 and raising the temperature of the battery module 122 in the vehicle heating mode will be described with reference to fig. 5.

Fig. 5 illustrates an operation state diagram for recovering waste heat from electrical components and raising a temperature of a battery module based on a heating mode in a heat pump system for a vehicle according to various exemplary embodiments of the present invention.

Referring to fig. 5, the heat pump system 100 may recover waste heat of the electrical components 116 in a vehicle heating mode, use it for indoor heating, and may raise the temperature of the battery module 122.

Further, a part of the first line 111 and the sixth line 131, which connect the first valve V1, are closed by the operation of the first valve V1.

In a state where the first line 111 connected to the radiator is closed by the operation of the fifth valve V5, the bypass line 118 is opened.

Furthermore, the open bypass line 118 may be connected to the fifth line 161 by operation of the fifth valve V5.

Thus, the coolant that has flowed through the electrical component 116 flows through the refrigerator 160 along the opened first line 111 and the fifth line 161. Thus, the coolant again flows through the electrical component 116 along the fifth line 161 and the open bypass line 118 without passing through the radiator 112, the temperature of which can be raised by the waste heat of the electrical component 116.

That is, in the electric component cooling apparatus 110, the coolant is circulated in the open first line 111, the open fifth line 161, and the bypass line 118 while the waste heat generated by the electric component 116 is recovered, so that the temperature of the coolant is increased.

The coolant having an increased temperature may be supplied to the refrigerator 160 connected to the fifth line 161. Accordingly, the waste heat generated from the electrical component 116 increases the temperature of the refrigerant supplied to the refrigerator 160.

That is, while the current operation is repeatedly performed, the coolant absorbs the waste heat of the electric component 116, so that the temperature of the coolant rises.

Further, when the coolant whose temperature has been raised by absorbing the waste heat of the electric component 116 flows through the refrigerator 160 by the operation of the first water pump 114, it is recovered while raising the temperature of the refrigerant supplied to the refrigerator 160.

Accordingly, the refrigerator 160 may raise the temperature of the refrigerant by heat exchanging the refrigerant with the refrigerant to recover waste heat from the refrigerant whose temperature is raised while flowing through the electrical component 116.

That is, the refrigerator 160 receives the refrigerant expanded by the operation of the second expansion valve 165 through the refrigerant connection line 163, and evaporates the supplied refrigerant by heat exchange with the coolant having a temperature increased while flowing through the electric component 116, thereby recovering waste heat of the electric component 116.

Supply line 133 is connected to second line 121 by operation of fourth valve V4, and second branch 137 is closed by operation of fourth valve V4 and fifth valve V5.

sixth lines

Here, when the temperature of the coolant circulating along the third line 141 is lower than the target temperature, the coolant heater 146 may be operated to heat the coolant circulating in the third line 141.

At the same time, the door opens, allowing outside air flowing into the HVAC module to flow through the heater 144 with the flow through the cooler 174.

Therefore, the outside air flowing in from the outside in the room temperature state, in which the outside air is not cooled while flowing through the cooler 174 to which the low temperature coolant is not supplied. The flowing outside air is converted into a high temperature state while flowing through the heater 144 to flow into the vehicle interior, so that the vehicle interior can be heated.

That is, the heat pump system 100 according to the exemplary embodiment of the present invention recovers waste heat generated by the electrical component 116 to be used for indoor heating of a vehicle, reduces power consumption of the compressor 59, and improves heating efficiency.

Meanwhile, the coolant having flowed through the heater 144 flows back to the condenser 153 along the third line 141 and the sixth line 131.

Accordingly, the coolant, the temperature of which has been raised while flowing through the heater 144 and the condenser 153, flows into the battery module 122, so that the temperature of the battery module 122 can be raised.

Meanwhile, in the CE device 150, the respective constituent elements may operate such that the refrigerant may circulate along the refrigerant line 151 to heat the vehicle interior.

Meanwhile, in the indoor cooling device 170, the fourth water pump 172 is operated, and the coolant circulates along the fourth pipe 171.

In one exemplary embodiment of the present invention, an operation of recovering heat from an external heat source and waste heat of the battery module 122 in a heating mode of the vehicle will be described with reference to fig. 6.

Fig. 6 illustrates an operation state diagram of recovering heat from an external heat source and recovering waste heat from a battery module based on a heating mode in a heat pump system for a vehicle according to various exemplary embodiments of the present invention.

Referring to fig. 6, the heat pump system 100 may be used for indoor heating by recovering heat from an external heat source and waste heat of the battery module 122 in a vehicle heating mode.

First, the fifth line 161 connected to the first line 111 is closed by the operation of the first valve V1. At the same time, the first leg 135 is opened.

Meanwhile, the second line 121 is connected to the fifth line 161 by the operation of the second valve V2. Further, a portion of the sixth line 131 connected to the second line 121 is closed by the operation of the second valve V2.

In an exemplary embodiment of the present invention, the fifth line 161 is connected to the first line 111 connected to the radiator 112 through the operation of the fifth valve V5.

Further, the second branch line 137 is closed by the operations of the fourth valve V4 and the fifth valve V5.

Accordingly, the coolant having flowed through the electrical component 116 may sequentially pass through the battery module 122 and the refrigerator 160 along the opened first line 111, the first branch line 135, the second line 121, and the fifth line 161.

Accordingly, the coolant having passed through the refrigerator 160 may recover heat of the heat source from the outside air while again passing through the radiator 112 along the opened fifth line 161 and the first line 111.

That is, the coolant may recover heat from the external air heat source from the radiator 112 while absorbing waste heat of the battery module 122 to be heated while circulating along the opened first, second, and

fifth lines

111, 135, 121, and 161 by the operation of the first and second water pumps 114 and 124.

Further, when the coolant having a temperature increased by absorbing heat from the external heat source and waste heat of the battery module 122 flows through the refrigerator 160 by the operation of the first and second water pumps 114, 124, it is recovered while increasing the temperature of the refrigerant supplied to the refrigerator 160.

Accordingly, the refrigerator 160 may increase the temperature of the refrigerant by heat-exchanging the refrigerant with the refrigerant to recover waste heat from the refrigerant whose temperature has been increased.

That is, the refrigerator 160 is supplied with the refrigerant expanded by the operation of the second expansion valve 165 through the refrigerant connection line 163, and the supplied refrigerant is evaporated by heat exchange between the supplied refrigerant and the coolant having a temperature increased by recovering heat from the external heat source and waste heat of the battery module 122, recovering heat from the external heat source and waste heat of the battery module 122.

Meanwhile, in an exemplary embodiment of the present invention, in a state where the radiator connection line 117 is closed by the operation of the third valve V3, the third line 141 is opened.

Accordingly, the coolant having flowed through the condenser 153 along the opened sixth line 131 may be supplied to the heater 144 along the third line 141.

Here, when the temperature of the coolant circulated along the third line 141 is lower than the target temperature, the coolant heater 146 may be operated to heat the coolant circulated in the third line 41.

Therefore, the outside air flowing in from the outside flows in a room temperature state, in which the outside air is not cooled while flowing through the cooler 174 to which the low-temperature coolant is not supplied. The flowing outside air is converted into a high temperature state while flowing through the heater 144 to flow into the vehicle interior, so that the vehicle interior can be heated.

That is, the heat pump system 100 according to the exemplary embodiment of the present invention recovers heat from waste heat generated from an external heat source and the battery module 122 to be used for indoor heating of a vehicle, reduces power consumption of the compressor 59 and improves heating efficiency.

Further, the coolant having flowed through the heater 144 flows through the condenser 153 along the sixth line 131 connected to the third line 141, and then circulates along the third line 141 and the sixth line 131 while being discharged back to the third line 141.

By repeatedly performing these operations, the vehicle interior can be heated.

In this case, the first expansion valve 155 is not operated, and the second expansion valve 165 expands the refrigerant having passed through the condenser 153 to supply it to the refrigerator 160. Thus, the supply of refrigerant to the evaporator 156 is stopped.

Meanwhile, in the indoor cooling device 170, the fourth water pump 172 operates, and the coolant circulates along the fourth pipe 171.

That is, the external air flowing into the HVAC module is dehumidified by the low-temperature coolant flowing into the cooler 174 while flowing through the cooler 174. Therefore, while flowing through the heater 114, it is converted into a high temperature state to flow into the vehicle interior, heating and dehumidifying the vehicle interior.

Further, an operation of recovering waste heat of the electric component 116 and the battery module 122 in the heating mode of the vehicle will be described with reference to fig. 7.

Referring to fig. 7, the heat pump system 100 may heat the indoor by recovering waste heat of the electrical components 116 and the battery module 122 in the vehicle heating mode.

First, the fifth line 161 connected to the first line 111 is closed by the operation of the first valve V1. At the same time, the first leg 135 is open.

Thereafter, the coolant that has passed through the refrigerator 160 again passes through the electrical component 116 and the battery module 122 along the open bypass line 118 without passing through the radiator 112, and thus, it may be heated by waste heat of the electrical component 116 and the battery module 122.

That is, in the electric component cooling device 110 and the battery cooling device 120, when the coolant circulates along the opened first line 111, first branch line 135, second line 121, fifth line 161, and bypass line 118, it can recover waste heat generated from the electric component 116 and the battery module 122, and can be heated.

The heated coolant may be supplied to a refrigerator 160 connected to a fifth line 161. Accordingly, the waste heat generated from the electrical components 116 and the battery module 122 increases the temperature of the coolant supplied to the refrigerator 160.

That is, the coolant may be heated by absorbing waste heat of the electrical components 116 and the battery modules 122 while repeatedly performing these operations.

Further, when the coolant heated by absorbing the waste heat of the electric components 116 and the battery module 122 flows through the refrigerator 160 by the operation of the first and second water pumps 114 and 124, the coolant is recovered while raising the temperature of the refrigerant supplied to the refrigerator 160.

Accordingly, the refrigerator 160 may raise the temperature of the refrigerant by heat exchanging the refrigerant with the refrigerant to recover waste heat from the refrigerant heated while flowing through the electrical components 116 and the battery module 122.

That is, the refrigerator 160 receives the refrigerant expanded by the operation of the second expansion valve 165 through the refrigerant connection line 163, evaporates the supplied refrigerant by heat exchange with the coolant heated while flowing through the electric components 116, and recovers waste heat from the electric components 116 and the battery module 122.

Meanwhile, in an exemplary embodiment of the present invention, the third line 141 may be opened in a state where the radiator connection line 117 is closed by the operation of the third valve V3.

Accordingly, the coolant flowing through the condenser 153 along the opened sixth line 131 may be supplied to the heater 144 along the third line 141.

Here, when the temperature of the coolant circulated along the third line 141 is lower than the target temperature, the coolant heater 146 may be operated to heat the coolant circulated in the third line 141.

That is, the heat pump system 100 according to the exemplary embodiment of the present invention recovers waste heat generated from the electric component 116 and the battery module 122 to be used for indoor heating of a vehicle, reduces power consumption of the compressor 59 and improves heating efficiency.

By repeatedly performing these operations, the vehicle interior can be heated.

That is, the external air flowing into the HVAC module is dehumidified by the low-temperature coolant flowing into the cooler 174 while flowing through the cooler 174. Therefore, while flowing through the heater 114, it is converted into a high temperature state to flow into the vehicle interior to heat and dehumidify the vehicle interior.

Therefore, when the heat pump system 100 for a vehicle according to the exemplary embodiment of the present invention is applied as described above, by using the refrigerator 160 in which the coolant and the refrigerant are heat-exchanged in the electric vehicle, the temperature of the battery module 122 can be controlled based on the vehicle mode, thereby simplifying the system.

Further, according to the exemplary embodiment of the present invention, the heating efficiency may be improved by selectively recovering heat from an external heat source in a vehicle heating mode, or waste heat generated from the electric component 116 or the battery module to be used for indoor heating.

Further, according to the exemplary embodiment of the present invention, by selectively heat-exchanging heat energy generated by the refrigerant during condensation and evaporation thereof with the coolant, and by controlling the temperature in the vehicle using the low-temperature or high-temperature coolant after the heat exchange, respectively, it is possible to simplify the system and simplify the layout of the connection lines through which the refrigerant circulates.

Further, according to the exemplary embodiment of the present invention, by effectively controlling the temperature of the battery module 122, the battery module 122 may be operated in an optimal performance state, and the total travel distance of the vehicle may be increased by effectively managing the battery module 122.

Further, according to the exemplary embodiment of the present invention, by modularizing the concentrated energy device 150 generating heat energy through condensation and evaporation of the refrigerant, and by using the high-performance refrigerant, the size and weight thereof can be reduced, and noise, vibration, and unstable operation can be further prevented as compared to the conventional air conditioner.

Further, according to an exemplary embodiment of the present invention, the coolant heater 146 applied to the indoor heating device 140 may be used as an auxiliary device for indoor heating to reduce cost and weight.

Further, according to the exemplary embodiments of the present invention, it is possible to reduce manufacturing cost and weight by simplifying the entire system, and to improve space utilization.

In various exemplary embodiments of the present invention, a controller is connected with at least one element of the heat pump system 100, such as, but not limited to, the first, second, third, fourth, and fifth valves V1, V2, V3, V4, and V5, to control the operation thereof.

Furthermore, terms associated with a control means such as "controller," "control device," "control unit," "control device," "control module," or "server" refer to a hardware device, including a memory and a processor, configured to perform one or more steps interpreted as an algorithmic structure. The memory stores algorithm steps and the processor executes the algorithm steps to perform one or more processes of the method according to various exemplary embodiments of the present invention. The control apparatus according to the exemplary embodiment of the present invention may be implemented by a nonvolatile memory configured to store an algorithm for controlling operations of various components of the vehicle or data regarding software commands for executing the algorithm, and a processor configured to perform the operations using the data stored in the memory. The memory and processor may be a single chip. Alternatively, the memory and processor may be integrated in a single chip. A processor may be implemented as one or more processors. The processor may include various logic circuits and operation circuits, may process data according to a program supplied from the memory, and may generate a control signal according to a processing result.

The control means may be at least one microprocessor operated by a predetermined program, which may include a series of commands for performing the methods included in the above-described various exemplary embodiments of the present invention.

The above-described invention can also be embodied as computer readable codes on a computer readable recording medium. The computer readable recording medium is any data storage device that can store data which can be thereafter read by a computer system and which can store and execute program instructions which can be thereafter read by the computer system. Examples of the computer-readable recording medium include a Hard Disk Drive (HDD), a Solid State Disk (SSD), a Silicon Disk Drive (SDD), a read-only memory (ROM), a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and an implementation as a carrier wave (e.g., transmission through the internet). Examples of program instructions include machine language code, such as produced by a compiler, and high-level language code that may be executed by the computer using an interpreter or the like.

In various exemplary embodiments of the present invention, each of the operations described above may be performed by a control device, and the control device may be configured by a plurality of control devices or an integrated single control device.

In various exemplary embodiments of the present invention, the control means may be implemented in the form of hardware or software, or may be implemented in a combination of hardware and software.

Furthermore, terms such as "unit," "module," and the like included in the specification mean that a unit for processing at least one function or operation can be implemented by hardware, software, or a combination thereof.

For convenience in explanation and accurate definition in the appended claims, the terms "upper", "lower", "inner", "outer", "upward", "downward", "front", "rear", "inner", "outer", "inward", "outward", "inner", "outer", "inner", "outer", "forward" and "rearward" are used to describe features of the exemplary embodiments with reference to the positions of such features as displayed in the figures. It is further understood that the term "attached" or derivatives thereof refers to both direct and indirect attachment.

The foregoing description of the predetermined exemplary embodiments of the invention has been presented for the purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable others skilled in the art to make and utilize various exemplary embodiments of the invention and various alternatives and modifications thereof. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A heat pump system for a vehicle, the heat pump system comprising:

an electrical component cooling device including a radiator and a first water pump disposed in a first line, and circulating coolant in the first line to cool at least one electrical component disposed in the first line;

a battery cooling device including a second water pump and a battery module provided in a second line, and circulating a coolant in the battery module;

an indoor heating device including a third water pump and a heater provided in a third line to heat the vehicle interior by using a high-temperature coolant;

an indoor cooling device including a fourth water pump and a cooler connected to each other through a fourth line to cool the vehicle interior using a low-temperature coolant;

a concentrated energy device in which heat energy generated during condensation and evaporation of a refrigerant circulating in a refrigerant line is exchanged with a introduced refrigerant to control a temperature of the refrigerant in order to supply a high-temperature coolant to the indoor heating device and a low-temperature coolant to the indoor cooling device; and

a refrigerator connected to a refrigerant connection line connected to the refrigerant line, the refrigerator being provided in a fifth line connected to the first line and the second line through a first valve and a second valve, respectively, and controlling a temperature of the coolant by exchanging heat of the selectively introduced coolant with the refrigerant,

Wherein a condenser included in the concentrated energy device is connected to the second line through the second valve to condense the refrigerant supplied through the refrigerant line by heat exchange with the refrigerant, and the condenser is disposed in a sixth line through which the refrigerant flows, and

wherein the first end of the third line is connected to a third valve provided in the sixth line.

2. The heat pump system for a vehicle of claim 1, wherein the centralized energy device comprises:

a first expansion valve connected to the condenser and the refrigerant line;

an evaporator connected to the first expansion valve through the refrigerant line, connected to the fourth line, and evaporating the refrigerant through heat exchange between the refrigerant and the coolant while reducing the temperature of the coolant;

a compressor disposed in the refrigerant line between the evaporator and the condenser; and

a receiver disposed in the refrigerant line between the evaporator and the compressor,

wherein a first end of the refrigerant connection line is connected to the refrigerant line between the condenser and the first expansion valve, an

Wherein a second end of the refrigerant connection line is connected to the refrigerant line between the evaporator and the accumulator.

3. The heat pump system for a vehicle according to claim 2,

wherein the first line is selectively connected to the sixth line through the first valve,

wherein the second end of the third pipeline is connected to the sixth pipeline at a position where the first pipeline intersects the sixth pipeline, and

wherein the first line connected to the radiator is connected to the third valve through a radiator connection line connecting the first line and the third valve.

4. A heat pump system for a vehicle according to claim 3, further comprising:

a supply line, wherein a first end of the supply line is connected to the third line and a second end of the supply line is selectively connected to the second line through a fourth valve;

a fifth valve disposed between the first line and the fifth line such that the fifth line connected to the refrigerator and the first line are selectively connected by an operation of the fifth valve;

a bypass line selectively connecting the first line connected to the first water pump by operation of the fifth valve such that coolant circulates to the at least one electrical component without flowing through the radiator;

A first branch selectively connecting the first valve and the fourth valve; and

a second branch selectively connecting the fourth valve and the fifth valve.

5. The heat pump system for a vehicle according to claim 4, wherein:

when the battery module is cooled in the cooling mode of the vehicle,

in the electric component cooling device, operating the first water pump;

closing the first branch line by operating the first valve and opening the first line connected to the sixth line;

opening the sixth line and the radiator connection line by operating the third valve, and closing the third line;

a coolant circulates through the radiator, the at least one electrical component, and the condenser along the open first line, a portion of the sixth line, and the radiator connection line;

in the battery cooling device, operating the second water pump;

by operation of the second valve, the second line and the fifth line are connected, and a portion of the sixth line connected to the second valve is closed;

closing the first branch line by operation of the first valve and the fourth valve;

Opening the second branch line by operation of the fourth valve and the fifth valve;

coolant that has flowed through the battery module flows from the second line through the refrigerator along the fifth line and then circulates along the opened second line, the fifth line, and the second branch line while flowing back through the second branch line to the second line;

in the centralized energy device, each constituent element operates such that refrigerant circulates along the refrigerant line; and is also provided with

In the indoor cooling device, the fourth water pump is operated such that coolant circulates along the fourth line connecting the evaporator and the cooler to supply the cooler with coolant that has flowed through the evaporator provided in the concentrated energy device.

6. The heat pump system for a vehicle according to claim 4, wherein:

when the at least one electrical component and the battery module are cooled by using the coolant cooled in the radiator in the cooling mode of the vehicle,

operating the first water pump and the second water pump in the electric component cooling device and the battery cooling device, respectively;

A portion of the first line connecting the first valve and the sixth line is closed by operation of the first valve;

by operation of the first valve, the fifth line is closed while the first branch line is open;

by operation of the fourth valve, the second line connected to the battery module is connected to the first branch line, and the supply line is closed;

opening the sixth line in a state where the fifth line is closed by the operation of the second valve;

the radiator connection pipe is connected to the first pipe connected to the radiator in a state where the third pipe is closed by an operation of the third valve;

the coolant cooled in the radiator passes through the at least one electrical component, the battery module, and the condenser in order along the opened first line, the first branch line, the second line, the sixth line, and the radiator connection line to flow into the radiator;

In the indoor cooling device, the fourth water pump is operated such that coolant circulates along the second connecting line connecting the evaporator and the cooler to supply the coolant that has flowed through the evaporator provided in the concentrated energy device to the cooler.

7. The heat pump system for a vehicle according to claim 4, wherein:

when heat is recovered from an external heat source and the temperature of the battery module is increased in the heating mode of the vehicle,

in the indoor heating device, operating the third water pump;

the first line is connected to the fifth line and closes the first branch line by operation of the first valve;

in a state where the bypass line is closed by an operation of the fifth valve, the first line connected to the radiator is opened, and the fifth line and the first line are connected;

the coolant having flowed through the at least one electric component flows through the refrigerator along the opened first and fifth lines, and then recovers heat from an external air heat source while flowing through the radiator again along the opened first line;

the fifth line connected to the second valve is closed, and the second line is connected to the sixth line through the second valve by operation of the second valve;

Opening the third line in a state where the radiator connection line is closed by an operation of the third valve;

the supply line and the second line are connected by operation of the fourth valve;

closing the second branch line by operation of the fourth valve and the fifth valve;

the coolant having flowed through the battery module flows through the condenser along the second and sixth opened lines and is then supplied to the heater along the third opened line;

coolant that has flowed through the heater flows back to the condenser along the third line and the sixth line;

some of the coolant that has passed through the condenser circulates while flowing back to the battery module along the open supply line and the second line; and is also provided with

In the centralized energy device, each constituent element operates such that refrigerant circulates along the refrigerant line.

8. The heat pump system for a vehicle according to claim 4, wherein:

when waste heat of the at least one electrical component is recovered and the temperature of the battery module is raised in the heating mode of the vehicle,

In the indoor heating device, operating the third water pump;

by operation of the first valve, the first line is connected to the fifth line and closes the first branch line;

opening the bypass line in a state where the first line connected to the radiator is closed by an operation of the fifth valve;

the fifth line and the open bypass line are connected by operation of the fifth valve;

the coolant having flowed through the at least one electrical component flows through the refrigerator along the opened first and fifth lines, and is then heated by waste heat of the at least one electrical component while flowing through the at least one electrical component along the opened bypass line without flowing through the radiator;

in a state where the radiator connection line is closed by the operation of the third valve, the third line is opened;

9. The heat pump system for a vehicle according to claim 8, wherein the refrigerator increases a temperature of the coolant by heat exchanging the coolant and the refrigerant to recover waste heat from the coolant heated while flowing through the at least one electric component.

10. The heat pump system for a vehicle according to claim 4, wherein:

When heat is recovered from an external heat source and waste heat of the battery module is recovered in the heating mode of the vehicle,

in the indoor heating device, operating a third water pump;

closing the fifth line connected to the first line and opening the first branch line by operation of the first valve;

a second line connected to the battery module is connected to the first branch line by operation of the fourth valve, and the supply line is closed;

the second line is connected to the fifth line, and a portion of the sixth line connected to the second line is closed by an operation of the second valve;

in a state where the bypass line is closed by operating the fifth valve, the first line connected to the radiator is opened, and the fifth line and the first line are connected;

The coolant having flowed through the at least one electric component flows through the battery module and the refrigerator in this order along the opened first line, the first branch line, the second line, and the fifth line, and then recovers heat from a heat source of external air while flowing through the radiator again along the opened first line;

coolant flowing through the condenser along the opened sixth line is supplied to the heater along the third line;

the coolant that has passed through the heater circulates while flowing back to the condenser along the third line and the opened sixth line; and is also provided with

11. The heat pump system for a vehicle according to claim 4, wherein,

when waste heat of the at least one electrical component and the battery module is recovered in the heating mode of the vehicle,

In the indoor heating device, operating a third water pump;

in a state where the first line connected to the radiator is closed by the operation of the fifth valve, a bypass line is opened;

the second branch line is closed by operation of the fourth valve and the fifth valve;

the coolant having flowed through the at least one electric component flows through the refrigerator along the opened first, second and fifth lines, and is then heated by waste heat of the at least one electric component and the battery module while flowing through the at least one electric component and the battery module along the opened bypass line without flowing through the radiator;

coolant that has flowed through a condenser along the opened sixth line is supplied to the heater along the third line;

12. The heat pump system for a vehicle according to claim 4, wherein the first valve, the fourth valve, and the fifth valve are four-way valves, and then the second valve and the third valve are three-way valves.

13. The heat pump system for a vehicle according to claim 2, wherein the refrigerant connection line is provided with a second expansion valve at a front end portion of the refrigerator to control a flow rate of the refrigerant flowing into the refrigerator and to selectively expand the refrigerant.

14. The heat pump system for a vehicle according to claim 13, wherein when the battery module is cooled using a coolant heat-exchanged with a refrigerant, or when waste heat from the at least one electric component and the battery module is selectively recovered, the second expansion valve expands the refrigerant flowing into the refrigerant connection line to flow the refrigerant into the refrigerator.

15. The heat pump system for a vehicle according to claim 13, wherein the first expansion valve and the second expansion valve are electronic expansion valves that selectively expand refrigerant while controlling a flow rate of the refrigerant.

16. The heat pump system for a vehicle according to claim 2, wherein when dehumidification is required in a heating mode of the vehicle, the fourth water pump provided in the indoor cooling device is operated, and a refrigerant is supplied to the evaporator in the concentrated energy device.

17. The heat pump system for a vehicle according to claim 1, wherein the indoor heating device further comprises a coolant heater provided in the third line between the third valve and the third water pump.

18. The heat pump system for a vehicle according to claim 17, wherein the coolant heater is operated when a temperature of coolant supplied to the heater is lower than a target temperature in a heating mode of the vehicle or when the battery module is heated.

19. The heat pump system for a vehicle according to claim 1, wherein the refrigerator recovers waste heat generated from the at least one electrical component or the battery module according to a cooling mode or a heating mode of the vehicle, or controls a temperature of the battery module.