KR20240000664A - Refrigerant valve module and vehicle heat pump system having the same - Google Patents

Abstract

The present invention selectively generates a rotational force to rotate the ball valve contained within the valve unit and the valve unit to open or close the flow passage or expand the refrigerant by selectively rotating the ball valve provided therein at a corresponding angle. an actuator, and a stem provided between the valve unit and the actuator to transmit the rotational force generated by the actuator to the ball valve of the refrigerant valve, and a stem stopper to transmit the rotational force of the actuator to the ball valve. Provides a refrigerant valve that is fixed to one specification and provides a diverse rotation angle range of the connecting shaft that transmits the rotational force of the actuator to the ball valve through a structure with one or two fixing pins, and a heat pump system for vehicles equipped with the same. do.

Description

Refrigerant valve and vehicle heat pump system equipped with the same {Refrigerant valve module and vehicle heat pump system having the same}

The present invention relates to a valve for refrigerant and a heat pump system for a vehicle equipped with the same, and more specifically, to a valve that fixes the stopper of the stem that transmits the rotational force of the actuator to the ball valve to a specification and has one or two fixing pins. The present invention relates to a valve for refrigerant that provides various rotation angle ranges of a connecting shaft that transmits the rotational force of the actuator to a ball valve through a structure, and a heat pump system for a vehicle equipped with the same.

Conventional refrigerant circuits for vehicle air conditioning operate as a compressor and evaporator or condenser and have multiple heat exchangers to transfer heat using refrigerant.

The components of the refrigerant circuit, in particular a large number of valves, are each integrated into the refrigerant circuit via connecting lines.

In this case, each valve is formed to perform only one function, which results in the need for a large number of valves and connection lines each, which not only increases the cost, but also increases the weight of the refrigerant circuit and requires a lot of installation space. do.

For this reason, as described in Patent Publication No. 10-2018-0087142 (2018.08.01), 'a valve for a vehicle heat pump system having one or more inlets, two or more outlets, and a valve member, wherein the valve member passes through one or more passages. and a valve for a vehicle heat pump system having one or more expansion recesses, wherein the expansion recesses can be fluidly connected to one or more outlets.

In order to change the flow path, expand, and close the refrigerant valve, a rotational force is generated through an actuator, and a stem is provided to transmit the rotational force to the refrigerant valve.

At this time, as shown in Figure 1, the stem transmits rotation according to the mode by limiting the rotation range of the rotation axis through a stopper and a fixing pin. One fixing pin is provided to limit the range of rotation, and the rotation Due to the different ranges, the stoppers were custom-made to fit each product.

In the prior art, the range of angles was limited through the shape of the stopper according to the position of the fixing pin, but in this case, it was difficult to commonize products with different angle ranges, and it caused additional development and processing costs according to new specifications.

The present invention provides a case for various rotation angle ranges through a structure that fixes the stopper to one specification and has a single or multiple fixing pins, and provides a refrigerant valve that can be expected to have a cost reduction effect through common valve use, and a valve equipped with the same. The purpose is to provide a heat pump system for vehicles.

The valve for refrigerant according to the present invention includes a valve portion that opens or closes a flow path or expands the refrigerant by selectively rotating a ball valve provided therein at a corresponding angle; an actuator that selectively generates a rotational force to rotate the ball valve accommodated inside the valve unit; and a stem that is provided between the valve unit and the actuator and transmits the rotational force generated by the actuator to the ball valve of the refrigerant valve.

At this time, the stem according to the present invention is provided between the actuator and the refrigerant valve, and is provided with a body that airtightens between the actuator and the refrigerant valve, and a connection part formed on the body at a position corresponding to the rotation axis of the actuator, , a connection shaft whose one end is connected to the rotation axis of the actuator and the other end connected to the ball valve of the refrigerant valve, a fixing pin inserted into a fixing hole formed around the connection shaft among the connection parts, and a connection shaft formed on the connection shaft. and includes a stopper that contacts the fixing pin to control the rotation angle range of the connecting shaft.

Here, it is preferable to form a plurality of fixing holes according to the present invention at intervals along the periphery of the connection axis among the connection parts.

At this time, the fixing hole according to the present invention forms a total of three fixing holes in the connection part, a first fixing hole, a second fixing hole, and a third fixing hole, so that the rotation angle range of the connecting shaft can be operated in four cases.

The first fixing hole according to the present invention is formed at the 9 o'clock point (rotation angle 0°) based on the plane view of the connection part, and the second fixing hole is formed counterclockwise with respect to the first fixing hole. It is formed at a point spaced apart at an angle of 60° in the direction, and the third fixing hole is formed at a point spaced at an angle of 30° counterclockwise with respect to the second fixing hole.

At this time, it is preferable that the separation angle from the first fixing hole to the third fixing hole according to the present invention is 90°.

Among the four cases according to the present invention, the first to third cases have two fixing pins, and the fourth case has one fixing pin.

In addition, the valve unit according to the present invention has a cylindrical overall shape, a body having a plurality of communication holes communicating from the outside to the inside on the outer surface, and is accommodated inside the body and optionally rotates inside the body. A ball valve that changes the flow path of the refrigerant and expands the refrigerant, a plurality of ball seals provided adjacent to the ball valve and airtight between the inner surface of the body and the ball valve, and a device through which the ball valve enters and exits the body. It includes a ball cap that is screwed into the communication hole and secures the ball valve accommodated inside the body so that it does not escape to the outside.

A heat pump system for a vehicle according to the present invention includes a compressor provided on a refrigerant circulation line through which a refrigerant circulates, and compressing and discharging the refrigerant flowing along the refrigerant circulation line; an indoor condenser connected to the compressor on the refrigerant circulation line, to heat the air provided to the interior of the vehicle by introducing the refrigerant discharged from the compressor and dissipating heat through heat exchange with the air provided to the interior; a water-cooled condenser connected to the indoor condenser on the refrigerant circulation line and introducing the refrigerant discharged from the indoor condenser to cool the refrigerant by water cooling; an air-cooled condenser connected to the water-cooled heat exchanger on the refrigerant circulation line and cooling the refrigerant discharged from the water-cooled heat exchanger by heat exchange with external air; An evaporator connected to the air-cooled condenser on the refrigerant circulation line, cools the air provided to the interior of the vehicle by introducing the refrigerant discharged from the air-cooled condenser and absorbing heat through heat exchange with the air provided to the interior of the vehicle; An accumulator provided at the inlet side of the compressor in the refrigerant circulation line, separates the refrigerant flowing into the compressor into gaseous refrigerant and liquid refrigerant, and then introduces only the gaseous refrigerant into the compressor; A first expansion valve provided at the inflow end of the water-cooled condenser in the refrigerant circulation line and controlling the flow path in one of open, closed, and expansion modes; and a second expansion valve provided at the inflow end of the evaporator in the refrigerant circulation line and controlling the flow path in one of a closed and expansion mode.

At this time, the refrigerant circulation line according to the present invention connects the compressor and the indoor condenser, and connects the first refrigerant circulation line that guides the refrigerant discharged from the compressor to flow to the indoor condenser, and connects the indoor condenser and the water-cooled condenser, A second refrigerant circulation line that guides the refrigerant leaked from the indoor condenser to flow to the water-cooled condenser, and a third refrigerant that connects the water-cooled condenser and the air-cooled condenser and guides the refrigerant leaked from the water-cooled condenser to flow to the air-cooled condenser. A fourth refrigerant circulation line connects the air-cooled condenser and the evaporator to guide the refrigerant flowing from the air-cooled condenser to the evaporator, and connects the evaporator and the accumulator to allow the refrigerant leaked from the evaporator to flow into the accumulator. A fifth refrigerant circulation line that guides the flow to, a sixth refrigerant circulation line branched from the outlet side of the indoor condenser of the second refrigerant circulation line and connected to the inlet side of the air-cooled condenser of the third refrigerant circulation line, and , It includes a seventh refrigerant purification line branched from the sixth refrigerant circulation line and connected to the inlet side of the evaporator of the fourth refrigerant circulation line.

Here, of the sixth refrigerant circulation lines according to the present invention, it is provided at a point where the seventh refrigerant purification line branches, and includes a third expansion valve that selectively controls the flow path in one of the opening and switching, expansion, and closing modes. .

And of the fourth refrigerant circulation line according to the present invention, it branches off from the outlet side of the air-cooled condenser and is connected to the battery and the ninth refrigerant circulation line, which is connected to the inlet side of the accumulator among the fifth refrigerant circulation line, A battery chiller that cools the battery by exchanging heat between the refrigerant flowing along the ninth refrigerant circulation line and the heat generated from the battery, and is provided on the inlet side of the battery chiller among the ninth refrigerant circulation lines, and is selectively opened and opened. It includes a fourth expansion valve that controls the flow path in one of switching, expansion, and closing modes.

In addition, it is provided at a branch point where the eighth refrigerant circulation line branches among the third refrigerant circulation lines according to the present invention, so that the refrigerant flowing out of the water-cooled condenser selectively flows only to the air-cooled condenser along the third refrigerant circulation line. It includes a three-way valve that opens and closes the flow path to allow the refrigerant to flow, or to allow the refrigerant to flow only to the eighth refrigerant circulation line.

In addition, it includes a 10th refrigerant circulation line that branches off from the point where the 4th expansion valve is provided among the 9th refrigerant circulation lines according to the present invention and is connected to the 8th refrigerant circulation line.

Here, in the outside air heat absorption heating mode (PE (Power Electric) + outside air heat absorption) of the vehicle heat pump system according to the present invention, the first expansion valve and the third expansion valve are controlled in the expansion mode, and the second expansion valve is closed. mode, the fourth expansion valve is controlled in an open mode, and the 3-way valve provided at the branch point of the 8th refrigerant circulation line among the 3rd refrigerant circulation lines operates the 8th refrigerant circulation in the 3rd refrigerant circulation line. The flow path is controlled so that the refrigerant flows through the line, so that the refrigerant flows into the compressor, is compressed, and then discharged. The refrigerant discharged from the compressor flows into the indoor condenser along the first refrigerant circulation line, and flows from the indoor condenser to the vehicle. The supplied air is heated by heat exchange with the supplied air provided to the interior, and the heated supplied air is supplied to the vehicle interior to heat the vehicle interior. The refrigerant flowing out of the indoor condenser is transferred to the water-cooled condenser and the water-cooled condenser along the second refrigerant circulation line. Each branch is branched to the air-cooled condenser. The refrigerant flowing out of the indoor condenser flows into the first expansion valve along the second refrigerant circulation line and expands, and the refrigerant expanded in the first expansion valve is transferred to the PE in the water-cooled condenser. After absorbing the temperature of the coolant circulating through the (Power Electric), the refrigerant flowing out of the water-cooled condenser flows to the fifth refrigerant circulation line along the eighth refrigerant circulation line by the three-way valve, and the fifth refrigerant The refrigerant flowing into the circulation line forms a circulation path of the refrigerant in which only the gaseous refrigerant flows back into the compressor through the accumulator, and the refrigerant flowing out of the indoor condenser circulates the sixth refrigerant along the second refrigerant circulation line. It branches off into a line and flows into the third expansion valve along the sixth refrigerant circulation line to expand, and the refrigerant expanded in the third expansion valve flows into the air-cooled condenser along the sixth refrigerant circulation line, After heat exchange with the outside air in the air-cooled condenser, the refrigerant flowing out of the air-cooled condenser flows to the ninth refrigerant circulation line along the fourth refrigerant circulation line, and the refrigerant flowing in the ninth refrigerant circulation line is the fourth refrigerant circulation line. By opening the expansion valve, the 9th refrigerant circulation line joins the 8th refrigerant circulation line along the 10th refrigerant circulation line, and flows into the 5th refrigerant circulation line along the 8th refrigerant circulation line. 5. The refrigerant flowing into the refrigerant circulation line forms a circulation path of the refrigerant in which only the gaseous refrigerant flows back into the compressor through the accumulator.

And in the heating and dehumidifying mode of the vehicle heat pump system according to the present invention, the first expansion valve is controlled in an expansion mode, the second expansion valve is controlled in a closed mode, and the third expansion valve is controlled in an open mode, The fourth expansion valve is controlled in a closed mode, and the three-way valve provided at the branch point of the eighth refrigerant circulation line among the third refrigerant circulation lines allows refrigerant to flow from the third refrigerant circulation line to the eighth refrigerant circulation line. The flow path is controlled so that the refrigerant flows into the compressor, is compressed, and then discharged, and the refrigerant discharged from the compressor flows into the indoor condenser along the first refrigerant circulation line, and supplies air from the indoor condenser to the vehicle interior. The supply air is heated through heat exchange with the vehicle, and the heated supply air is provided to the vehicle interior to heat the vehicle interior. The refrigerant flowing out of the indoor condenser branches to the water-cooled condenser and the evaporator along the second refrigerant circulation line, respectively. The refrigerant flowing out of the indoor condenser flows into the first expansion valve along the second refrigerant circulation line and expands, and the refrigerant expanded in the first expansion valve absorbs the cooling water temperature in the water-cooled condenser, The refrigerant flowing out of the water-cooled condenser flows along the 8th refrigerant circulation line to the 5th refrigerant circulation line by the 3-way valve, and the refrigerant flowing into the 5th refrigerant circulation line is in a gaseous state through the accumulator. Only the refrigerant flows back into the compressor, forming a circulation path for the refrigerant, and the refrigerant flowing out of the indoor condenser branches into the sixth refrigerant circulation line along the second refrigerant circulation line, and the second refrigerant circulation line follows the sixth refrigerant circulation line. 3 flows into the expansion valve, bypasses, flows from the 3rd expansion valve to the 4th refrigerant circulation line along the 7th refrigerant circulation line, expands by the 2nd expansion valve, and then flows to the evaporator. The moisture contained in the supplied air is removed through heat exchange with the supplied air provided from the evaporator to the vehicle interior, and the dehumidified supplied air is provided to the vehicle interior to heat and dehumidify the vehicle interior, and the moisture flowing out of the evaporator is removed. The refrigerant flows into the accumulator along the fifth refrigerant circulation line, forming a circulation path of the refrigerant in which only the gaseous refrigerant flows back into the compressor through the accumulator.

In addition, in the heating mode (PE (Power Electric) only) of the vehicle heat pump system according to the present invention, the first expansion valve is controlled in expansion mode, and the second expansion valve, third expansion valve, and fourth expansion valve is controlled in closed mode, and the 3-way valve provided at the branch point of the 8th refrigerant circulation line among the 3rd refrigerant circulation lines is controlled so that the refrigerant flows from the 3rd refrigerant circulation line to the 8th refrigerant circulation line. , the refrigerant flows into the compressor, is compressed, and then discharged, and the refrigerant discharged from the compressor flows into the indoor condenser along the first refrigerant circulation line, and exchanges heat with the supply air provided from the indoor condenser to the vehicle interior. is heated, the heated supply air is provided to the vehicle interior to heat the vehicle interior, and the refrigerant flowing out of the indoor condenser flows into the first expansion valve along the second refrigerant circulation line and expands. The refrigerant expanded in the first expansion valve absorbs the temperature of the cooling water circulating through the PE (Power Electric) in the water-cooled condenser, and then the refrigerant flowing out of the water-cooled condenser flows along the 8th refrigerant circulation line by the 3-way valve. The refrigerant flowing into the fifth refrigerant circulation line forms a circulation path of the refrigerant in which only the gaseous refrigerant flows back into the compressor through the accumulator.

In addition, in the cooling and battery cooling mode of the vehicle heat pump system according to the present invention, the first expansion valve is controlled in the open mode, the second expansion valve and the fourth expansion valve are controlled in the expansion mode, and the third expansion valve is controlled in the expansion mode. is controlled in closed mode, and the 3-way valve provided at the branch point of the 8th refrigerant circulation line among the 3rd refrigerant circulation lines is controlled so that the refrigerant flows only to the 3rd refrigerant circulation line, so that the refrigerant flows into the compressor. The refrigerant discharged from the compressor flows into the indoor condenser along the first refrigerant circulation line and passes through the indoor condenser, and the refrigerant discharged from the indoor condenser is the second refrigerant. It flows out as is without expanding into the first expansion valve along the circulation line, and the refrigerant passing through the first expansion valve radiates heat in the water-cooled condenser, and the refrigerant flowing out of the water-cooled condenser is expanded to the third refrigerant by the 3-way valve. The refrigerant flows into the air-cooled condenser along the circulation line, is condensed by heat exchange with the outside air in the air-cooled condenser, and then flows into the second expansion valve along the fourth refrigerant circulation line. The refrigerant flowing into the second expansion valve is After being expanded by the second expansion valve, it flows into the evaporator, cools the supplied air through heat exchange with the supplied air provided from the evaporator to the vehicle interior, and the cooled supplied air is provided to the vehicle interior to cool the vehicle interior. , the refrigerant flowing out of the evaporator flows along the fifth refrigerant circulation line and forms a circulation path of the refrigerant in which only the gaseous refrigerant flows back into the compressor through the accumulator, and the air-cooled condenser so that the battery is cooled. The refrigerant flowing out of the fourth refrigerant circulation line branches off and flows to the battery chiller. After being condensed by heat exchange with the outside air in the air-cooled condenser, the refrigerant branched from the fourth refrigerant circulation line flows into the ninth refrigerant circulation line. The refrigerant flows into the fourth expansion valve and flows along the ninth refrigerant circulation line, is expanded by the fourth expansion valve, and then cools the battery through heat exchange with the battery coolant in the battery chiller. , the refrigerant flowing out of the battery chiller joins the fifth refrigerant circulation line, forming a circulation path of the refrigerant flowing into the compressor through the accumulator along the fifth refrigerant circulation line.

The effects exhibited by the refrigerant valve according to the present invention and the vehicle heat pump system equipped with the same are as follows.

By fixing the stem stopper provided in the refrigerant valve to one specification and providing a variety of rotation angle range cases through a structure equipped with a single or multiple fixing pins, cost reduction effects can be expected through valve commonization.

Figure 1 is an exemplary diagram showing a stem fixing pin and a stopper provided in a refrigerant valve according to the prior art.
Figure 2 is an exemplary diagram showing a heat pump system for a vehicle equipped with a valve for refrigerant according to the present invention.
Figure 3 is a reference diagram showing the state of assembling a refrigerant valve to a manifold module according to an embodiment of the present invention.
Figure 4 is an exploded perspective view showing a valve for refrigerant according to an embodiment of the present invention.
Figure 5 is a cross-sectional view showing a valve for refrigerant according to an embodiment of the present invention.
Figure 6 is an exemplary diagram showing a state in which the stem of a refrigerant valve according to an embodiment of the present invention is coupled.
Figures 7a to 7c are exemplary diagrams showing a state in which a rotation angle range is set by coupling two fixing pins to a plurality of fixing holes formed in the connection portion of the stem according to an embodiment of the present invention.
Figures 8a to 8c are exemplary diagrams showing a state in which a rotation angle range is set by coupling one fixing pin to a plurality of fixing holes formed in the connection portion of the stem according to an embodiment of the present invention.
Figure 9 is an exemplary diagram showing the circulation process of the refrigerant in the outside air heat absorption heating mode (PE (Power Electric) + outside air heat absorption) of a vehicle heat pump system equipped with a refrigerant valve according to an embodiment of the present invention.
Figure 10 is an exemplary diagram showing the circulation process of refrigerant in the heating and dehumidifying mode of a vehicle heat pump system equipped with a refrigerant valve according to an embodiment of the present invention.
Figure 11 is an exemplary diagram showing the circulation process of the refrigerant in the heating mode (PE (Power Electric) only) of a vehicle heat pump system equipped with a refrigerant valve according to an embodiment of the present invention.
Figure 12 is an exemplary diagram showing the circulation process of refrigerant in the cooling and battery cooling modes of a vehicle heat pump system equipped with a refrigerant valve according to an embodiment of the present invention.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. Prior to this, the terms or words used in this specification and claims should not be construed as limited to their usual or dictionary meanings, and the inventor should appropriately define the concept of terms in order to explain his or her invention in the best way. Based on the principle of definability, it must be interpreted with meaning and concept consistent with the technical idea of the present invention.

Accordingly, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, and therefore, at the time of filing this application, they can be replaced by equivalent equivalents. It should be understood that there may be variations.

The present invention fixes the stopper of the stem, which transmits the rotational force of the actuator to the ball valve, to one specification, and provides various rotation angle ranges of the connecting shaft that transmits the rotational force of the actuator to the ball valve through a structure provided with one or two fixing pins. This relates to a refrigerant valve and a vehicle heat pump system equipped with the same, which can reduce costs through common use of valves. When examined with reference to the drawings, the present invention is as follows.

First, looking at the vehicle heat pump system 100 equipped with a refrigerant valve according to an embodiment of the present invention, as follows.

Referring to FIG. 2, the vehicle heat pump system 100 equipped with a refrigerant valve according to an embodiment of the present invention includes a compressor 110, an indoor condenser 120, a water-cooled condenser 130, an air-cooled condenser 140, and an evaporator. It includes a battery chiller (150), a battery chiller (160), an accumulator (170), etc. First, the compressor (110) compresses the refrigerant introduced through the inlet end to high temperature and high pressure and discharges it.

At this time, the compressor 110 is an electric compressor driven by power, and is driven by power applied from the outside according to a drive signal sent from the control unit (not shown) of the vehicle heat pump system 100 to compress the introduced refrigerant. and discharge it.

And the refrigerant discharged from the compressor 110 flows into the indoor condenser 120, where the indoor condenser 120 flows in the refrigerant discharged from the compressor 110 and heats the supplied air through heat exchange with the supplied air. do.

Therefore, the refrigerant flowing into the indoor condenser 120 heats the supplied air through heat exchange with the supplied air supplied from the indoor condenser 120 to the interior of the vehicle, and the heated supplied air is provided to the interior of the vehicle to heat the interior of the vehicle. .

Here, the compressor 110 and the indoor condenser 120 are connected to the first refrigerant circulation line 10, where one side of the first refrigerant circulation line 10 is connected to the discharge end of the compressor 110, and the other side is connected to the discharge end of the compressor 110. The side is connected to the inlet end of the indoor condenser 120, so that the refrigerant compressed in the compressor 110 flows into the indoor condenser 120.

And the refrigerant flowing out of the indoor condenser 120 flows into the water-cooled condenser 130 and the air-cooled condenser 140. The water-cooled condenser 130 cools the inflow refrigerant with cooling water and then transfers it to the air-cooled condenser 140. The air-cooled condenser 140 air-cools the introduced refrigerant through heat exchange with external air and discharges it.

Here, it is desirable that the cooling water flowing into the water-cooled condenser 130 circulates through electrical components (not shown).

And the indoor condenser 120 and the water-cooled condenser 130 are connected to each other through a second refrigerant circulation line 20, where one side of the second refrigerant circulation line 20 is connected to the outlet end of the indoor condenser 120. And the other side is connected to the inflow end of the water-cooled condenser 130, so that the refrigerant discharged from the indoor condenser 120 flows into the water-cooled condenser 130.

At this time, a first expansion valve 210 is provided on the inlet side of the water-cooled condenser 130 of the second refrigerant circulation line 20. The first expansion valve 210 is a refrigerant valve having a refrigerant expansion function. , It is a heating expansion valve (EXV) that exerts an expansion function to expand the refrigerant during heating and heating + dehumidification mode, and operates according to a signal sent from the control unit (not shown) of the vehicle heat pump system or the mode selected by the user. The refrigerant is selectively discharged without expansion, or expanded and discharged.

Accordingly, the refrigerant flowing out of the indoor condenser 120 flows along the second refrigerant circulation line 20 and flows into the water-cooled condenser 130 without being selectively expanded by the first expansion valve 210. It may be expanded, or it may be injected after expansion.

And the air-cooled condenser 140 is connected to the water-cooled condenser 130 and the third refrigerant circulation line 30, and the refrigerant flowing out of the water-cooled condenser 130 is air-cooled through heat exchange with external air and flows out.

In addition, the refrigerant flowing out of the air-cooled condenser 140 selectively flows into the evaporator 150, which is connected to the air-cooled condenser 140 and the fourth refrigerant circulation line 40, and the air-cooled condenser 140 is connected to the fourth refrigerant circulation line 40. After the refrigerant leaked from the condenser 140 is introduced, the supplied air is cooled by heat exchange with the supplied air provided to the car interior.

At this time, the second expansion valve 230 is provided on the inlet side of the evaporator 150 of the fourth refrigerant circulation line 40. The second expansion valve 230 is a solenoid expansion valve (SOL TXV) for vehicles. It is selectively controlled to open according to a signal sent from the control unit (not shown) of the heat pump system or the mode selected by the user, and the refrigerant flowing into the evaporator 150 along the fourth refrigerant circulation line 40 is controlled. By expanding, the expanded refrigerant flows into the evaporator 150.

Therefore, after being expanded by the second expansion valve 230, the refrigerant flowing into the evaporator 150 cools the supplied air through heat exchange with the supplied air provided from the evaporator 150 to the vehicle interior, and the cooled supplied air is It is provided to the vehicle interior to cool the interior of the vehicle.

Here, the indoor condenser 120 and the evaporator 150 are provided inside the housing (not shown) of the air conditioning unit, and a blowing means (not shown) is provided at the tip of the housing (not shown) of the air conditioning unit, and the blowing means The indoor condenser 120 and the evaporator 150 are provided at the rear (not shown), and the blowing means (not shown) is driven according to a signal for each operation mode sent from the control unit (not shown) of the vehicle heat pump system. As the outside air flowing in from outside the vehicle or the inside air flowing in from the inside of the vehicle is converted into supply air, it passes through the indoor condenser 120 and the evaporator 150 and is blown into the rear of the vehicle interior.

In addition, the rear of the indoor condenser 120 and the evaporator 150 may be divided into a heating passage and a cooling passage by a partition, and a passage opening and closing door (not shown) is provided at the tip of the partition, so that the control unit of the vehicle heat pump system By rotating the passage opening/closing door (not shown) according to a signal for each operation mode transmitted from (not shown), the heating passage or cooling passage is selectively opened or closed, or the opening degree is adjusted.

In addition, a PTC heater (not shown) is provided behind the indoor condenser 120, and the PTC heater (not shown) is applied from the outside according to a signal for each operation mode transmitted from the control unit (not shown) of the heat pump system. It is selectively driven by a power source to add heat to the air supply that has passed through the indoor condenser 120. In winter, when heating the interior of a vehicle, insufficient heat can be supplemented through a PTC heater (not shown).

And the refrigerant flowing out of the evaporator 150 forms a refrigerant circulation path that flows back into the compressor 110 along the fifth refrigerant circulation line 50.

Among the fifth refrigerant circulation lines 50, an accumulator 170 is provided at the rear of the compressor 110. The accumulator 170 separates the inflow refrigerant into liquid phase and gas phase and discharges only the gas phase refrigerant to the compressor 110. ) so that it flows into the

Therefore, the first refrigerant circulation line 10 to the fifth refrigerant circulation line 50 includes the compressor 110, the indoor condenser 120, the first expansion valve 210, the water-cooled condenser 130, and the air-cooled condenser 140. ), the second expansion valve 230, the evaporator 150, and the accumulator 170 are connected in that order to allow the refrigerant to flow.

And the vehicle heat pump system 100 according to an embodiment of the present invention includes the indoor condenser 120 of the second refrigerant circulation line 20 connecting the indoor condenser 120 and the water-cooled condenser 130. A sixth refrigerant circulation branched from the outlet side and connected to the inlet side of the air-cooled condenser 140 among the third refrigerant circulation lines 30 connecting the water-cooled condenser 130 and the air-cooled condenser 140. Including the line 60, the refrigerant discharged from the indoor condenser 120 flows into the air-cooled condenser 140.

At this time, the sixth refrigerant circulation line 60 is provided with a third expansion valve 240. The third expansion valve 240 is a refrigerant valve with a refrigerant expansion function, and the refrigerant is used in heating and heating + dehumidification mode. It is a dehumidifying expansion valve (EXV) that exerts an expansion function to expand the refrigerant, and selectively opens or closes the passage through which the refrigerant flows, or expands and flows out the refrigerant while switching the passage.

Here, the seventh refrigerant circulation line 70 is branched from the third expansion valve 240, and the seventh refrigerant circulation line 70 is connected to the third expansion valve 240 of the sixth refrigerant circulation line 60. It is branched and connected to the inlet side of the evaporator 150 of the fourth refrigerant circulation line 40 connecting the air-cooled condenser 140 and the evaporator 150.

The third expansion valve 240 selectively flows the refrigerant according to a signal transmitted from the control unit (not shown) of the vehicle heat pump system 100 or the mode selected by the user, or expands the refrigerant by switching the flow path. It leaks.

Therefore, the refrigerant flowing out of the indoor condenser 120 flows along the second refrigerant circulation line 20 and is selectively expanded by the third expansion valve 240, thereby flowing along the sixth refrigerant circulation line 60. It may flow into the air-cooled condenser 140, or it may expand and flow into the evaporator 150 along the seventh refrigerant circulation line 70.

Therefore, when the seventh refrigerant circulation line 70 is opened, before entering the first expansion valve 210, some of the high-temperature, high-pressure refrigerant flows along the sixth refrigerant circulation line 60 and opens the third expansion valve ( 240), the expanded refrigerant flows into the evaporator 150 along the seventh refrigerant circulation line 70, and the moisture contained in the air is removed through heat exchange with the air supply provided to the interior of the vehicle. Accordingly, the dehumidifying performance of the vehicle interior is demonstrated.

And the third refrigerant circulation line 30 connecting the water-cooled condenser 130 and the air-cooled condenser 140 is branched from the outlet side of the water-cooled condenser 130, and connects the indoor condenser 120 and the accumulator. Among the fifth refrigerant circulation lines 50 connected to (170), including the eighth refrigerant circulation line 80 connected to the inlet side of the accumulator 170, water-cooled with cooling water from the water-cooled condenser 130 The refrigerant flows into the accumulator 170.

At this time, a 3-way valve 220 is provided at a branch point of the 3rd refrigerant circulation line 30 where the 8th refrigerant circulation line 80 branches. The 3-way valve 220 selectively operates the 8th refrigerant circulation. By opening or closing the line 80, the refrigerant flowing out of the water-cooled condenser 130 selectively flows along the second refrigerant circulation line 20 or the eighth refrigerant circulation line 80. 5Make sure it joins the refrigerant circulation line (50).

Therefore, the refrigerant flowing out of the water-cooled condenser 130 by the 3-way valve 220 flows into the air-cooled condenser 140 along the third refrigerant circulation line 30, or flows into the water-cooled condenser 130. The leaked refrigerant flows into the accumulator 170 along the eighth refrigerant circulation line 80.

In addition, the fourth refrigerant circulation line 40 connecting the air-cooled condenser 140 and the evaporator 150 branches off from the outlet side of the air-cooled condenser 140, and connects the evaporator 150 and the accumulator 170. ), including the ninth refrigerant circulation line 90 connected to the inlet side of the accumulator 170 among the fifth refrigerant circulation lines 50 connected to the air-cooled condenser 140. flows into the accumulator 170.

At this time, a fourth expansion valve 250 and a battery chiller 160 are provided on the ninth refrigerant circulation line 90. The battery chiller 160 is in contact with a battery (not shown), and the ninth refrigerant circulation line 90 is provided with a fourth expansion valve 250 and a battery chiller 160. The refrigerant flowing in along (90) is exchanged with heat generated from the battery (not shown) to cool the battery (not shown).

And the fourth expansion valve 250 is a refrigerant valve with a refrigerant expansion function, and is a battery expansion valve (EXV) that exerts an expansion function to expand the refrigerant in the cooling + battery cooling mode, and selectively allows the refrigerant to flow. The flow path is opened or closed, or the refrigerant expands and flows out.

Here, the 10th refrigerant circulation line 91 is branched from the 4th expansion valve 250, and the 10th refrigerant circulation line 91 is branched from the 4th expansion valve 250 of the 9th refrigerant circulation line 90. It is branched and connected to the inlet side of the accumulator 170 among the eighth refrigerant circulation lines 80 connecting the water-cooled condenser 130 and the accumulator 170.

The fourth expansion valve 250 selectively expands and discharges the refrigerant according to a signal transmitted from the control unit (not shown) of the vehicle heat pump system 100 or the mode selected by the user, or allows the refrigerant to flow as is without expansion. Convert and make it flow.

Therefore, the refrigerant flowing out of the air-cooled condenser 140 flows along the fourth refrigerant circulation line 40 and is selectively expanded to low temperature and low pressure by the fourth expansion valve 250, so that the expanded refrigerant becomes the 9th refrigerant. The refrigerant flows into the battery chiller 160 along the refrigerant circulation line 90, exchanges heat with heat generated from the battery (not shown) to cool the battery (not shown), or cools the refrigerant flowing out of the air-cooled condenser 140. is allowed to flow into the accumulator (170) along the tenth refrigerant circulation line (91).

The first refrigerant circulation line 10 to the tenth refrigerant circulation line 91 according to the embodiment of the present invention with reference to FIG. 3 is preferably not formed as a pipe, but as a manifold structure, and the manifold The fold module 1000 has a manifold-shaped flow path inside the first refrigerant circulation line 10 to the tenth refrigerant circulation line 91 through which refrigerant can flow according to the heat pump system mode such as heating, dehumidification, and cooling. and a mounting hole for mounting the first to fourth expansion valves 210 to 250 and the battery chiller 160, and each element is connected to a coolant module (not shown). Integrated thermal management within the vehicle is possible.

The upper plate 1000a of the manifold module 1000 is preferably manufactured through a forging process, and the lower plate 1000b is preferably manufactured through a pressing process. The upper plate 1000a and lower plate 1000b of the manifold module 1000 manufactured in this way are formed by joining them to each other through a brazing process.

The manifold module 1000 is a structure that can maximize thermal efficiency through a thermal interference prevention structure, and by applying a manifold structure to each refrigerant circulation line through which refrigerant flows, individual housings and connections are significantly reduced, resulting in cost reduction. There is an advantage.

Here, the first expansion valve 210, the third expansion valve 240, and the fourth expansion valve 250 are expansion valves 2000 for refrigerant, and are largely comprised of an actuator 2500 for driving the valve, and a stem. It is divided into (2600) and a valve part (2700) for expansion and refrigerant flow conversion.

Looking at the refrigerant valve 2000 according to an embodiment of the present invention in more detail, as follows.

The refrigerant valve 2000 with reference to FIGS. 4 to 6 includes a valve portion 2700, an actuator 2500, and a stem 2600. First, the valve portion 2700 is a ball valve provided therein. (2200) is selectively rotated at a corresponding angle to open or close the flow path or to expand the refrigerant.

Looking at the valve unit 2700 in more detail, the valve unit 2700 includes a body 2100, a ball valve 2200, a ball seal 2300, and a ball cap 2400, and the body 2100 is the overall The shape is cylindrical, and a plurality of communication holes 2101 communicating from the outside to the inside are formed on the outer surface.

At this time, the overall shape of the body 2100 is formed in a tapered shape where the area of the lower surface is smaller than the area of the upper surface. The tapered shape is formed on both left and right sides based on the center line that vertically divides the center of the body 2100. It is desirable that the slope of is symmetrical.

When assembling the body 2100 into the mounting hole of the manifold module 1000, there is a risk that the O-rings 2102 provided on the upper and lower sides of the body 2100 may interfere with the flow path, causing damage such as being chewed or torn. However, by forming the body 2100 in a tapered shape, it is possible to prevent the O-ring 2102 from being compressed past the opening and thus being damaged.

Therefore, as the body 2100 is formed in a tapered shape, there is an advantage in that it is easy to mount.

The ball valve 2200 is accommodated inside the body 2100, and rotates inside the body 2100 to change the refrigerant flow path and expand the refrigerant.

At this time, the ball valve 2200 is formed with a flow path 2201, an expansion recess 2202, and a rotation control hole 2203. The flow path 2201 of the ball valve 2200 runs from the vertical direction to the horizontal direction, Alternatively, it is preferable to form it to have a length in a right angle shape so that the refrigerant can flow from the horizontal direction to the vertical direction.

Here, the flow path 2201 is preferably formed in a curved shape, and the fan-shaped member 2205 forming the inner wall of the flow path 2201 is removed, so that the cross-section of the flow path 2201 is streamlined.

The main factor in the conventional right-angled flow path is the pressure drop due to sudden change in flow path, but the flow path 2201 of the present invention is formed as a curve without corners, and a fan-shaped member 2205 forming the inner surface of the flow path 2201 is used. ) is removed, the effect of improving the pressure drop between the inlet and outlet of the flow path 2201 is achieved. Therefore, the stability of the heat pump system can be secured by minimizing damage that can be transmitted to other elements such as the condensers 120, 140, 150, compressor 110, and accumulator 170 in the heat pump system through pressure drop. .

In addition, the expansion recess 2202 of the ball valve 2200 is formed in a groove shape on one side of the outer surface of the ball valve 2200, and is not fully open as the ball valve 2200 rotates. A certain amount of refrigerant can be expanded.

Here, a partition 2204 is formed between the expansion recess 2202 and the flow path 2201, and the partition 2204 distinguishes between the open mode and the expansion mode.

In addition, an additional closed mode is created through the partition 2204 between the expansion recess 2202 and the flow path 2201, thereby improving the responsiveness of the valve and reducing the load due to a decrease in the rotation speed of the motor and gear. You can.

In addition, it is desirable that the width of the partition wall 2204 of the expansion recess 2202 exactly corresponds to the length of the circumference of the ball valve 2200, and the surface area of the ball valve 2200 moves in close contact with the ball seal 2300, When the inner surface of the ball seal 2300 is placed on the partition 2204, refrigerant does not flow through the expansion recess 2202.

In addition, the depth and width of the expansion recess 2202 can be variably formed as needed.

In addition, a plurality of ball seals 2300 are provided adjacent to the ball valve 2200, and provide airtightness between the inner surface of the body 2100 and the ball valve 2200.

At this time, the ball seal 2300 is in the form of a ring with a hole in the center to allow the flow of refrigerant. It is preferable that a pair of ball seals 2300 are adjacent to each other on both sides with the ball valve 2200 in the center.

The ball cap 2400 is screwed to the communication hole 2101 through which the ball valve 2200 enters and exits among the communication holes 2101 of the body 2100, so that the ball valve 2200 accommodated inside the body 2100 ) is fixed so that it does not escape to the outside, and the ball seal 2300 is pressed so as to be in close contact with the outer surface of the ball valve 2200.

At this time, the ball cap 2400 also forms a through hole in the center to allow the flow of refrigerant.

And the actuator 2500 selectively generates rotational force to rotate the ball valve 2200 accommodated inside the body 2100.

At this time, the actuator 2500 and the ball valve 2200 are connected by a stem 2600, and the stem 2600 airtightens the space between the valve portion 2700 and the actuator 2500, and the actuator 2500 ) is transmitted to the ball valve (2200).

Here, the stem 2600 includes a stem body 2610, a connecting shaft 2620, a fixing pin 2630, and a stopper 2640, and the stem body 2610 includes the valve portion 2700 and It is preferably formed in the form of a plate so that it can be provided between the actuators 2500 and airtight, and a connecting shaft 2620 is provided at the point where the rotation axis of the actuator 2500 is located among the stem body 2610. A connection portion 2611 is formed.

The connecting shaft 2620 is provided in a vertical line at the connecting portion 2611 of the stem body 2610 formed on a position corresponding to the rotation axis of the actuator 2500 among the stem body 2610, and one end is at the It is connected to the rotation axis of the actuator 2500, and the other end is connected to the ball valve 2200 of the valve unit 2700.

Therefore, when the rotation axis of the actuator 2500 is rotated in the above configuration, the connection shaft 2620 of the stem 2600 rotates in conjunction, and the rotation of the connection shaft 2620 causes the valve unit 2700 to rotate. The ball valve 2200 rotates.

And the fixing pin 2630 is inserted into the fixing hole 2612 formed around the connecting shaft 2620 of the connecting portion 2611.

At this time, the connecting shaft 2620 is provided with a stopper 2640. The stopper 2640 is fan-shaped and both ends contact the fixing pin 2630 to control the rotation angle range of the connecting shaft 2620. ( It is desirable that the circumferential angle of the stopper 2640 be formed differently depending on design conditions.)

Therefore, when the connecting shaft 2620 rotates, the rotation angle range of the ball valve 2200 is limited by the stopper 2640 provided on the connecting shaft 2620, thereby realizing the functions of closing, expanding, and opening. You can.

The fixing hole 2612 formed in the connection portion 2611 of the stem body 2610 according to an embodiment of the present invention with reference to FIGS. 7A to 8C is not formed as a single hole as in the prior art, but is formed in plural pieces. Two fixing holes 2612 are formed at intervals around the connecting shaft 2620 of the connecting portion 2611.

At this time, the fixing pin 2630 is press-fitted into the fixing hole 2612 and is provided in one or two pieces, thereby limiting the rotation angle range of the connecting shaft 2620.

For example, a total of three fixing holes (2612a, 2612b, 2612c), including a first fixing hole (2612a), a second fixing hole (2612b), and a third fixing hole (2612c), are formed in the connection portion 2611 to make the connection. The rotation angle range of the axis 2620 can be operated in four cases.

Here, the first fixing hole 2612a is formed at the 9 o'clock point (rotation angle 0°) when viewed from the plane of the connection part 2611, and the second fixing hole 2612b is formed based on this point. They are formed at points spaced apart at an angle of 60° in the counterclockwise direction, and based on this point, the third fixing holes 2612c are formed at each point spaced apart at an angle of 30° in the counterclockwise direction.

Therefore, the separation angle from the first fixing hole 2612a to the third fixing hole 2612c is 90°.

And among the four cases, the first to third cases are equipped with two fixing pins 2630, and the fourth case is equipped with one fixing pin 2630.

First, in the first case, fixing pins 2630 are provided in each of the first fixing hole 2612a and the second fixing hole 2612b, and the rotation angle range of the connecting shaft 2620 is the first fixing hole (2612a). The rotation angle θ1 can be rotated to 290° by the two fixing pins 2630 provided in each of the second fixing holes 2612a) and 2612b.

At this time, the separation angle between the first fixing hole 2612a and the second fixing hole 2612b is 60°, and due to the thickness of the fixing pin 2630, it is preferable to exclude 10° from the angle range.

And in the second case, fixing pins 2630 are provided in each of the first fixing hole 2612a and the third fixing hole 2612c, and the rotation angle range of the connecting shaft 2620 is the first fixing hole 2612a. ) and the two fixing pins 2630 provided in the third fixing hole 2612c, respectively, the rotation angle θ2 can be rotated to 260°.

At this time, the separation angle between the first fixing hole 2612a and the third fixing hole 2612c is 90°, and due to the thickness of the fixing pin 2630, it is preferable to exclude 10° from the angle range.

And in the third case, fixing pins 2630 are provided in each of the second fixing holes 2612b and the third fixing holes 2612c, and the rotation angle range of the connecting shaft 2620 is the second fixing hole 2612b. ) and the two fixing pins 2630 provided in the third fixing hole 2612c, respectively, the rotation angle θ3 can be rotated to 320°.

At this time, the separation angle between the second fixing hole 2612b and the third fixing hole 2612c is 30°, and due to the thickness of the fixing pin 2630, it is preferable to exclude 10° from the angle range.

Case 4 is equipped with a single fixing pin and is operated as Case 4-1, Case 4-2, and Case 4-3, respectively.

In case 4-1, the fixing pin 2630 is provided only in the first fixing hole 2612a, and the rotation angle range of the connecting shaft 2620 is the fixing pin 2630 provided only in the first fixing hole 2612a. ), the rotation angle (θ4) can be rotated to 350°.

At this time, due to the thickness of the fixing pin 2630, it is desirable to exclude 10° from the angle range.

In case 4-2, the fixing pin 2630 is provided only in the second fixing hole 2612b, and the rotation angle range of the connecting shaft 2620 is the fixing pin 2630 provided only in the second fixing hole 2612b. ), the rotation angle (θ5) can be rotated to 350°.

In case 4-3, the fixing pin 2630 is provided only in the third fixing hole 2612c, and the rotation angle range of the connecting shaft 2620 is the fixing pin 2630 provided only in the third fixing hole 2612c. ), the rotation angle (θ6) can be rotated to 350°.

Therefore, the stem 2600 according to an embodiment of the present invention fixes the stopper 2640 provided on the connection shaft 2620, which transmits the rotational force of the actuator 2500 to the ball valve 2200, to one specification, and the connection Various rotation angles of the connecting shaft 2620 can be adjusted through a structure including one or two fixing pins 2630 in the first to third fixing holes 2612a to 2612c formed around the shaft 2620. By providing a range, costs can be reduced through valve sharing.

Referring to FIGS. 9 to 12, the refrigerant circulation process for each external air absorption heating mode (PE (Power Electric) + external air absorption), heating dehumidification mode, cooling, and battery cooling mode of the vehicle heat pump system according to an embodiment of the present invention is shown. Looking at it, it is as follows.

In the outside air endothermic heating mode (PE (Power Electric) + outside air endotherm) referring to FIG. 9, when the outside air endothermic heating mode is selected by a signal sent from the control unit (not shown) of the vehicle heat pump system 100 or the user's selection, By rotating a passage opening/closing door (not shown) provided inside the housing (not shown) of the air conditioning unit, the heating passage is opened and the cooling passage is closed.

And the first expansion valve 210 and the third expansion valve 240 are controlled in expansion mode, the second expansion valve 230 is controlled in closed mode, and the fourth expansion valve 250 is open ( It is controlled in bypass) mode, and the 3-way valve 220 provided at the branch point of the 8th refrigerant circulation line 80 of the 3rd refrigerant circulation line 30 is operated in the third refrigerant circulation line 30. 8 The flow path is controlled so that the refrigerant flows through the refrigerant circulation line (80).

By controlling the above valves, the refrigerant flows into the compressor 110, is compressed, and then discharged, and the refrigerant discharged from the compressor 110 flows to the indoor condenser 120 along the first refrigerant circulation line 10. The supplied air is heated through heat exchange with the supplied air supplied from the indoor condenser 120 to the vehicle interior, and the heated supplied air is supplied to the vehicle interior to heat the vehicle interior.

And the refrigerant leaked from the indoor condenser 120 is branched to the water-cooled condenser 130 and the air-cooled condenser 140 along the second refrigerant circulation line 20, respectively. The refrigerant flows into the first expansion valve 210 along the second refrigerant circulation line 20 and expands, and the refrigerant expanded in the first expansion valve 210 is used as PE (Power Electric) in the water-cooled condenser 130. ), the refrigerant flowing out of the water-cooled condenser (130) is circulated through the fifth refrigerant circulation line (50) along the eighth refrigerant circulation line (80) by the three-way valve (220). ) flows.

The refrigerant flowing into the fifth refrigerant circulation line 50 forms a circulation path in which only the gaseous refrigerant flows back into the compressor 110 through the accumulator 170.

In addition, the refrigerant flowing out of the indoor condenser 120 branches off into the sixth refrigerant circulation line 60 along the second refrigerant circulation line 20, and into the third refrigerant circulation line 60 along the sixth refrigerant circulation line 60. Expansion occurs by flowing into the expansion valve 240, and the refrigerant expanded in the third expansion valve 240 flows into the air-cooled condenser 140 along the sixth refrigerant circulation line 60. After heat exchange with the outside air in (140), the refrigerant flowing out of the air-cooled condenser (140) flows to the ninth refrigerant circulation line (90) along the fourth refrigerant circulation line (40), and the ninth refrigerant circulation. The refrigerant flowing through the line 90 is circulated through the eighth refrigerant along the tenth refrigerant circulation line 91 in the ninth refrigerant circulation line 90 by opening (flow conversion) of the fourth expansion valve 250. It joins the line 80 and flows into the fifth refrigerant circulation line 50 along the eighth refrigerant circulation line 80.

The refrigerant flowing into the fifth refrigerant circulation line 50 forms a circulation path in which only the gaseous refrigerant flows back into the compressor 110 through the accumulator 170.

In the heating and dehumidifying mode referring to FIG. 10, when the heating and dehumidifying mode is selected by a signal transmitted from the control unit (not shown) of the vehicle heat pump system 100 or the user's selection, the heating and dehumidifying mode is installed inside the housing (not shown) of the air conditioning unit. By rotating the passage opening/closing door (not shown), the heating passage is opened and the cooling passage is also opened.

And the first expansion valve 210 is controlled in expansion mode, the second expansion valve 230 is controlled in closed mode, and the third expansion valve 240 is controlled in open (bypass) mode, The fourth expansion valve 250 is controlled in a closed mode, and the three-way valve 220 provided at the branch point of the eighth refrigerant circulation line 80 among the third refrigerant circulation lines 30 is used to control the third refrigerant. The flow path is controlled so that the refrigerant flows from the circulation line 30 to the eighth refrigerant circulation line 80.

By controlling the above valves, the refrigerant flows into the compressor 110, is compressed, and then discharged, and the refrigerant discharged from the compressor 110 flows to the indoor condenser 120 along the first refrigerant circulation line 10. The supplied air is heated through heat exchange with the supplied air supplied from the indoor condenser 120 to the vehicle interior, and the heated supplied air is supplied to the vehicle interior to heat the vehicle interior.

And the refrigerant leaked from the indoor condenser 120 is branched to the water-cooled condenser 130 and the evaporator 150 along the second refrigerant circulation line 20, respectively. It flows into the first expansion valve 210 along the second refrigerant circulation line 20 and expands, and the refrigerant expanded in the first expansion valve 210 absorbs the coolant temperature in the water-cooled condenser 130. Afterwards, the refrigerant flowing out of the water-cooled condenser 130 flows to the fifth refrigerant circulation line 50 along the eighth refrigerant circulation line 80 by the three-way valve 220.

The refrigerant flowing into the fifth refrigerant circulation line 50 forms a circulation path in which only the gaseous refrigerant flows back into the compressor 110 through the accumulator 170.

In addition, the refrigerant flowing out of the indoor condenser 120 branches off into the sixth refrigerant circulation line 60 along the second refrigerant circulation line 20, and into the third refrigerant circulation line 60 along the sixth refrigerant circulation line 60. It flows into the expansion valve 240 and is bypassed, and from the third expansion valve 240, it joins the fourth refrigerant circulation line 40 along the seventh refrigerant circulation line 70, and the second After being expanded by the expansion valve 230, it flows into the evaporator 150, and the moisture contained in the supplied air is removed through heat exchange with the supplied air supplied from the evaporator 150 to the vehicle interior, and the dehumidified supplied air is removed from the vehicle. It is provided indoors and dehumidifies the vehicle interior along with heating.

The refrigerant flowing out of the evaporator 150 flows into the accumulator 170 along the fifth refrigerant circulation line 50, and only the gaseous refrigerant flows back into the compressor 110 through the accumulator 170. It forms a circulation path for the refrigerant.

Here, an intermediate heat exchanger (IHX) is provided that overlaps the fifth refrigerant circulation line 50 and the seventh refrigerant circulation line 70, and the intermediate heat exchanger (IHX) connects the seventh refrigerant circulation line 70. The refrigerant flowing along and the refrigerant flowing out of the evaporator 150 exchange heat with each other.

As the intermediate heat exchanger exchanges heat with the refrigerant flowing along the seventh refrigerant circulation line 70 and the refrigerant flowing out of the evaporator 150, the degree of superheating of the refrigerant flowing out of the evaporator 150 increases. Damage to the compressor 110 due to inflow of liquid refrigerant can be prevented, and through this, constant dehumidification performance can be maintained.

In the heating mode (PE (Power Electric) only) referring to FIG. 11, when the heating mode is selected by a signal sent from the control unit (not shown) of the vehicle heat pump system 100 or the user's selection, the housing of the air conditioning unit ( By rotating the passage opening/closing door (not shown) provided inside, the heating passage is opened and the cooling passage is closed.

And the first expansion valve 210 is controlled in expansion mode, and the second expansion valve 230, third expansion valve 240, and fourth expansion valve 250 are controlled in closing mode, and the first expansion valve 230 is controlled in expansion mode. The 3-way valve 220 provided at the branch point of the 8th refrigerant circulation line 80 among the 3 refrigerant circulation lines 30 allows the refrigerant to flow from the 3rd refrigerant circulation line 30 to the 8th refrigerant circulation line 80. The flow path is controlled to flow.

By controlling the above valves, the refrigerant flows into the compressor 110, is compressed, and then discharged, and the refrigerant discharged from the compressor 110 flows to the indoor condenser 120 along the first refrigerant circulation line 10. The supplied air is heated through heat exchange with the supplied air supplied from the indoor condenser 120 to the vehicle interior, and the heated supplied air is supplied to the vehicle interior to heat the vehicle interior.

And the refrigerant flowing out of the indoor condenser 120 flows into the first expansion valve 210 along the second refrigerant circulation line 20 and expands, and the refrigerant expanded in the first expansion valve 210 After absorbing the temperature of the coolant circulating through PE (Power Electric) in the water-cooled condenser 130, the refrigerant flowing out of the water-cooled condenser 130 is circulated through the 8th refrigerant circulation line 80 by the 3-way valve 220. ) flows into the fifth refrigerant circulation line (50).

The refrigerant flowing into the fifth refrigerant circulation line 50 forms a circulation path in which only the gaseous refrigerant flows back into the compressor 110 through the accumulator 170.

In the air conditioning and battery cooling mode referring to FIG. 12, when the air conditioning and battery cooling mode is selected by a signal sent from the control unit (not shown) of the vehicle heat pump system 100 or the user's selection, the housing (not shown) of the air conditioning unit ) By rotating the passage opening/closing door (not shown) provided inside, the heating passage is closed and the cooling passage is opened.

And the first expansion valve 210 is controlled in an open mode, the second expansion valve 230 and the fourth expansion valve 250 are controlled in an expansion mode, and the third expansion valve 240 is in a closed mode. The three-way valve 220 provided at the branch point of the eighth refrigerant circulation line 80 among the third refrigerant circulation lines 30 allows the refrigerant to flow only to the third refrigerant circulation line 30. The euro is controlled.

By controlling the above valves, the refrigerant flows into the compressor 110, is compressed, and then discharged, and the refrigerant discharged from the compressor 110 flows to the indoor condenser 120 along the first refrigerant circulation line 10. It flows in and passes through the indoor condenser 120.

And the refrigerant flowing out of the indoor condenser 120 flows out as is without expanding into the first expansion valve 210 along the second refrigerant circulation line 20, and the refrigerant passing through the first expansion valve 210 Heat is dissipated from the water-cooled condenser 130.

The refrigerant flowing out of the water-cooled condenser 130 flows into the air-cooled condenser 140 along the third refrigerant circulation line 30 by the 3-way valve 220, and exchanges heat with the outside air in the air-cooled condenser 140. After being condensed, it flows into the second expansion valve 230 along the fourth refrigerant circulation line 40, and the refrigerant flowing into the second expansion valve 230 is sent to the second expansion valve 230. After being expanded, it flows into the evaporator 150, cools the supplied air through heat exchange with the supplied air supplied from the evaporator 150 to the vehicle interior, and the cooled supplied air is provided to the vehicle interior to cool the vehicle interior. .

The refrigerant flowing out of the evaporator 150 flows along the fifth refrigerant circulation line 50 and forms a circulation path of the refrigerant in which only the gaseous refrigerant flows back into the compressor 110 through the accumulator 170. .

In order to cool the battery, the refrigerant leaked from the air-cooled condenser 140 branches off along the fourth refrigerant circulation line 40 and flows to the battery chiller 160, where it is used to cool the outside air and cool the battery. After condensing through heat exchange, the refrigerant branched from the fourth refrigerant circulation line 40 flows into the fourth expansion valve 250 along the ninth refrigerant circulation line 90, and the ninth refrigerant circulation line ( The refrigerant flowing along 90) is expanded by the fourth expansion valve 250 and then cools the battery (not shown) through heat exchange with the battery coolant (not shown) in the battery chiller 160. The refrigerant leaked from the battery chiller 160 joins the fifth refrigerant circulation line 50, and the refrigerant flows into the compressor 110 through the accumulator 170 along the fifth refrigerant circulation line 50. It forms a circular path of

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely illustrative, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the attached patent claims.

10: first refrigerant circulation line 20: second refrigerant circulation line
30: Third refrigerant circulation line 40: Fourth refrigerant circulation line
50: 5th refrigerant circulation line 60: 6th refrigerant circulation line
70: 7th refrigerant circulation line 80: 8th refrigerant circulation line
90: 9th refrigerant circulation line 91: 10th refrigerant circulation line
100: Vehicle heat pump system
110: Compressor 120: Indoor condenser
130: Water-cooled condenser 140: Air-cooled condenser
150: Evaporator 160: Battery chiller
170: Accumulator 210: First expansion valve
220: 3-way valve 230: second expansion valve
240: Third expansion valve 250: Fourth expansion valve
1000: Manifold module 1000a: Top plate
1000b: Lower plate 2000: Expansion valve for refrigerant
2100: body 2101: communication hole
2102: O-ring 2200: Ball valve
2201: Euro 2202: Expansion recess
2203: Rotation adjuster 2204: Bulkhead
2205: Sector-shaped member 2300: Ball seal
2400: Ball cap 2500: Actuator
2600: Stem 2610: Stem body
2611: Connection 2612: Fixing hole
2620: Connecting shaft 2630: Fixing pin
2640: Stopper 2700: Valve part

Claims (18)

A valve unit that selectively rotates the ball valve provided therein at a corresponding angle to open or close the flow path or expand the refrigerant;
an actuator that selectively generates a rotational force to rotate the ball valve accommodated inside the valve unit; and
A refrigerant valve including a stem provided between the valve unit and the actuator and transmitting rotational force generated by the actuator to a ball valve of the refrigerant valve.
In claim 1,
The stem is
A body provided between the actuator and the refrigerant valve to airtightly seal the space between the actuator and the refrigerant valve;
A connection shaft provided at a connection part of the body at a position corresponding to the rotation axis of the actuator, one end of which is connected to the rotation axis of the actuator and the other end of which is connected to a ball valve of the refrigerant valve;
A fixing pin inserted into a fixing hole formed around the connection shaft of the connection part,
A refrigerant valve formed on the connecting shaft and including a stopper that contacts the fixing pin to regulate the rotation angle range of the connecting shaft.
In claim 2,
The fixing hole is
A refrigerant valve, characterized in that a plurality of the connection parts are formed at intervals around the connection shaft.
In claim 2,
The fixing hole is
A refrigerant valve in which a total of three fixing holes, a first fixing hole, a second fixing hole, and a third fixing hole, are formed in the connection part so that the rotation angle range of the connection shaft can be operated in four cases.
In claim 4,
The first fixing hole is formed at the 9 o'clock point (rotation angle 0°) with respect to the plane of the connection part,
The second fixing hole is formed at a point spaced apart from the first fixing hole at an angle of 60° counterclockwise,
A valve for refrigerant, characterized in that the third fixing hole is formed at a point spaced apart from the second fixing hole at an angle of 30° counterclockwise.
In claim 5,
A valve for refrigerant, characterized in that the separation angle from the first fixing hole to the third fixing hole is 90°.
In claim 4,
Among the four cases, the first to third cases are provided with two fixing pins, and the fourth case is provided with one fixing pin.
In claim 2,
The valve part
The body has a cylindrical overall shape and has a plurality of communication holes on the outer surface communicating from the outside to the inside,
a ball valve accommodated inside the body and selectively rotating inside the body to change the refrigerant flow path and expand the refrigerant;
A plurality of ball seals provided adjacent to the ball valve and airtight between the inner surface of the body and the ball valve,
A refrigerant valve including a ball cap that is screwed to a communication hole through which the ball valve enters and exits the body and secures the ball valve accommodated in the body so that it does not escape to the outside.
A compressor provided on a refrigerant circulation line through which a refrigerant circulates, and compressing and discharging the refrigerant flowing along the refrigerant circulation line;
an indoor condenser connected to the compressor on the refrigerant circulation line, to heat the air provided to the interior of the vehicle by introducing the refrigerant discharged from the compressor and dissipating heat through heat exchange with the air provided to the interior;
a water-cooled condenser connected to the indoor condenser on the refrigerant circulation line and introducing the refrigerant discharged from the indoor condenser to cool the refrigerant by water cooling;
an air-cooled condenser connected to the water-cooled heat exchanger on the refrigerant circulation line and cooling the refrigerant discharged from the water-cooled heat exchanger by heat exchange with external air;
An evaporator connected to the air-cooled condenser on the refrigerant circulation line, cools the air provided to the interior of the vehicle by introducing the refrigerant discharged from the air-cooled condenser and absorbing heat through heat exchange with the air provided to the interior of the vehicle;
An accumulator provided at the inlet side of the compressor in the refrigerant circulation line, separates the refrigerant flowing into the compressor into gaseous refrigerant and liquid refrigerant, and then introduces only the gaseous refrigerant into the compressor;
A first expansion valve provided at the inflow end of the water-cooled condenser in the refrigerant circulation line and controlling the flow path in one of open, closed, and expansion modes; and
A heat pump system for a vehicle including a second expansion valve provided at an inflow end of the evaporator in the refrigerant circulation line and controlling the flow path in one of a closed mode and an expansion mode.
In claim 9,
The refrigerant circulation line is
A first refrigerant circulation line that connects the compressor and the indoor condenser and guides the refrigerant discharged from the compressor to flow to the indoor condenser;
A second refrigerant circulation line that connects the indoor condenser and the water-cooled condenser and guides the refrigerant leaked from the indoor condenser to flow to the water-cooled condenser;
A third refrigerant circulation line that connects the water-cooled condenser and the air-cooled condenser and guides the refrigerant flowing out of the water-cooled condenser to flow to the air-cooled condenser;
A fourth refrigerant circulation line that connects the air-cooled condenser and the evaporator and guides the refrigerant discharged from the air-cooled condenser to flow to the evaporator,
A fifth refrigerant circulation line that connects the evaporator and the accumulator and guides the refrigerant leaked from the evaporator to flow to the accumulator,
A sixth refrigerant circulation line branched from the outlet side of the indoor condenser of the second refrigerant circulation line and connected to the inlet side of the air-cooled condenser of the third refrigerant circulation line,
A heat pump system for a vehicle including a seventh refrigerant purification line branched from the sixth refrigerant circulation line and connected to the inflow end of the evaporator of the fourth refrigerant circulation line.
In claim 10,
A heat pump system for a vehicle including a third expansion valve provided at a point where the seventh refrigerant purification line of the sixth refrigerant circulation line branches, and selectively controlling the flow path in any one of open and switching, expansion, and closing modes.
In claim 11,
A ninth refrigerant circulation line branched from the outlet side of the air-cooled condenser among the fourth refrigerant circulation lines and connected to the inlet side of the accumulator among the fifth refrigerant circulation lines;
a battery chiller that interacts with the battery and cools the battery by exchanging heat between a refrigerant flowing along the ninth refrigerant circulation line and heat generated from the battery;
A heat pump system for a vehicle including a fourth expansion valve provided at the inflow end of the battery chiller in the ninth refrigerant circulation line and selectively controlling the flow path in any one of open, switching, expansion, and closing modes.
In claim 12,
It is provided at a branch point where the eighth refrigerant circulation line of the third refrigerant circulation line branches, so that the refrigerant flowing out of the water-cooled condenser selectively flows only to the air-cooled condenser along the third refrigerant circulation line, or A heat pump system for a vehicle including a three-way valve that opens and closes a flow path so that the refrigerant flows only into the eighth refrigerant circulation line.
In claim 13,
A heat pump system for a vehicle including a tenth refrigerant circulation line branched from the ninth refrigerant circulation line at a point where a fourth expansion valve is provided and connected to the eighth refrigerant circulation line.
In claim 14,
In outside air heat absorption heating mode (PE (Power Electric) + outside air heat absorption),
The first expansion valve and the third expansion valve are controlled in an expansion mode, the second expansion valve is controlled in a closed mode, the fourth expansion valve is controlled in an open mode, and the first expansion valve of the third refrigerant circulation line is controlled in an open mode. The 3-way valve provided at the branch point of the 8th refrigerant circulation line controls the flow path so that the refrigerant flows from the 3rd refrigerant circulation line to the 8th refrigerant circulation line.
The refrigerant flows into the compressor, is compressed, and is then discharged, and the refrigerant discharged from the compressor flows into the indoor condenser along the first refrigerant circulation line, and heat exchanges with the supply air provided from the indoor condenser to the vehicle interior. Heated, heated supply air is provided to the vehicle interior to heat the vehicle interior.
The refrigerant flowing out of the indoor condenser is branched into the water-cooled condenser and the air-cooled condenser along the second refrigerant circulation line, and the refrigerant flowing out of the indoor condenser flows into the first expansion valve along the second refrigerant circulation line. Expansion occurs, and the refrigerant expanded in the first expansion valve absorbs the temperature of the coolant circulating through the PE (Power Electric) in the water-cooled condenser, and then the refrigerant flowing out of the water-cooled condenser is transferred to the 8th valve by the 3-way valve. The refrigerant flows into the fifth refrigerant circulation line along the refrigerant circulation line, and the refrigerant flowing into the fifth refrigerant circulation line forms a circulation path of the refrigerant in which only the gaseous refrigerant flows back into the compressor through the accumulator,
The refrigerant flowing out of the indoor condenser branches off into the sixth refrigerant circulation line along the second refrigerant circulation line, flows into the third expansion valve along the sixth refrigerant circulation line, and expands, and the third expansion occurs. The refrigerant expanded in the valve flows into the air-cooled condenser along the sixth refrigerant circulation line, and after exchanging heat with the outside air in the air-cooled condenser, the refrigerant flowing out of the air-cooled condenser flows into the ninth refrigerant circulation line along the fourth refrigerant circulation line. The refrigerant flowing in the refrigerant circulation line and the 9th refrigerant circulation line joins the 8th refrigerant circulation line along the 10th refrigerant circulation line from the 9th refrigerant circulation line by opening the fourth expansion valve. , flows into the fifth refrigerant circulation line along the eighth refrigerant circulation line, and the refrigerant flowing into the fifth refrigerant circulation line has a circulation path of the refrigerant in which only the gaseous refrigerant flows back into the compressor through the accumulator. A heat pump system for vehicles.
In claim 14,
In heating and dehumidifying mode,
The first expansion valve is controlled in an expansion mode, the second expansion valve is controlled in a closed mode, the third expansion valve is controlled in an open mode, the fourth expansion valve is controlled in a closed mode, and the fourth expansion valve is controlled in a closed mode. The 3-way valve provided at the branch point of the 8th refrigerant circulation line among the 3 refrigerant circulation lines controls the flow path so that the refrigerant flows from the 3rd refrigerant circulation line to the 8th refrigerant circulation line,
The refrigerant flows into the compressor, is compressed, and is then discharged, and the refrigerant discharged from the compressor flows into the indoor condenser along the first refrigerant circulation line, and heat exchanges with the supply air provided from the indoor condenser to the vehicle interior. Heated, heated supply air is provided to the vehicle interior to heat the vehicle interior.
The refrigerant flowing out of the indoor condenser is branched into the water-cooled condenser and the evaporator along the second refrigerant circulation line, and the refrigerant flowing out of the indoor condenser flows into the first expansion valve along the second refrigerant circulation line and expands. This is accomplished, the refrigerant expanded in the first expansion valve absorbs the cooling water temperature in the water-cooled condenser, and then the refrigerant flowing out of the water-cooled condenser is transferred to the fifth refrigerant along the eighth refrigerant circulation line by the three-way valve. The refrigerant flowing in the circulation line and the fifth refrigerant circulation line forms a circulation path of the refrigerant in which only the gaseous refrigerant flows back into the compressor through the accumulator,
The refrigerant flowing out of the indoor condenser branches off into the sixth refrigerant circulation line along the second refrigerant circulation line, flows into the third expansion valve along the sixth refrigerant circulation line, and bypasses the third expansion valve. From the expansion valve, it joins the fourth refrigerant circulation line along the seventh refrigerant circulation line, is expanded by the second expansion valve, and flows into the evaporator, thereby exchanging heat with the supply air provided from the evaporator to the vehicle interior. The moisture contained in the supplied air is removed, and the dehumidified supplied air is provided to the vehicle interior, where dehumidification is performed along with heating the vehicle interior.
The refrigerant flowing out of the evaporator flows into the accumulator along the fifth refrigerant circulation line, forming a circulation path of the refrigerant in which only the gaseous refrigerant flows back into the compressor through the accumulator.
In claim 14,
In heating mode (PE (Power Electric) only),
The first expansion valve is controlled in an expansion mode, the second expansion valve, the third expansion valve, and the fourth expansion valve are controlled in a closed mode, and the branch of the eighth refrigerant circulation line among the third refrigerant circulation lines The 3-way valve provided at this point controls the flow path so that the refrigerant flows from the 3rd refrigerant circulation line to the 8th refrigerant circulation line,
The refrigerant flows into the compressor, is compressed, and is then discharged, and the refrigerant discharged from the compressor flows into the indoor condenser along the first refrigerant circulation line, and heat exchanges with the supply air provided from the indoor condenser to the vehicle interior. Heated, heated supply air is provided to the vehicle interior to heat the vehicle interior,
The refrigerant flowing out of the indoor condenser flows into the first expansion valve along the second refrigerant circulation line and expands, and the refrigerant expanded in the first expansion valve is the coolant that circulates PE (Power Electric) in the water-cooled condenser. After absorbing heat, the refrigerant flowing out of the water-cooled condenser flows along the 8th refrigerant circulation line to the 5th refrigerant circulation line by the 3-way valve, and the refrigerant flowing into the 5th refrigerant circulation line is the A vehicle heat pump system that forms a circulation path for refrigerant in which only gaseous refrigerant flows back into the compressor through an accumulator.
In claim 14,
In cooling and battery cooling mode,
The first expansion valve is controlled in an open mode, the second expansion valve and the fourth expansion valve are controlled in an expansion mode, the third expansion valve is controlled in a closed mode, and the first expansion valve of the third refrigerant circulation line is controlled in an expansion mode. The 3-way valve provided at the branch point of the 8 refrigerant circulation line controls the flow path so that the refrigerant flows only to the 3rd refrigerant circulation line.
The refrigerant flows into the compressor, is compressed, and then discharged. The refrigerant discharged from the compressor flows into the indoor condenser along the first refrigerant circulation line and passes through the indoor condenser. The refrigerant discharged from the indoor condenser is The refrigerant flows out without being expanded into the first expansion valve along the second refrigerant circulation line, the refrigerant passing through the first expansion valve dissipates heat in the water-cooled condenser, and the refrigerant flowing out of the water-cooled condenser is expanded by the three-way valve. It flows into the air-cooled condenser along the third refrigerant circulation line, is condensed by heat exchange with the outside air in the air-cooled condenser, then flows into the second expansion valve along the fourth refrigerant circulation line, and flows into the second expansion valve. The refrigerant is expanded by the second expansion valve, then flows into the evaporator, cools the supplied air through heat exchange with the supplied air supplied from the evaporator to the vehicle interior, and the cooled supplied air is provided to the vehicle interior. Cooling is achieved, and the refrigerant flowing out of the evaporator flows along the fifth refrigerant circulation line and forms a circulation path of the refrigerant in which only the gaseous refrigerant flows back into the compressor through the accumulator,
To cool the battery, the refrigerant flowing out of the air-cooled condenser branches off along the fourth refrigerant circulation line and flows to the battery chiller. After being condensed through heat exchange with the outside air in the air-cooled condenser, the refrigerant flows into the fourth refrigerant circulation line. The branched refrigerant flows into the fourth expansion valve along the ninth refrigerant circulation line, and the refrigerant flowing along the ninth refrigerant circulation line is expanded by the fourth expansion valve and then transferred to the battery in the battery chiller. The battery is cooled by heat exchange with the coolant, and the refrigerant flowing out of the battery chiller joins the fifth refrigerant circulation line, and flows into the compressor through the accumulator along the fifth refrigerant circulation line. A vehicle heat pump system that constitutes a

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