KR102326346B1 - Heat pump system for vehicle - Google Patents

Abstract

The present invention relates to a vehicle heat pump system, and more particularly, in a heat pump system in which an evaporator is installed in a cold air passage in an air conditioning case and an air-cooled condenser is installed in a hot air passage, in the refrigerant circulation line at the outlet side of the air-cooled condenser The present invention relates to a vehicle heat pump system capable of improving heating performance by increasing the refrigerant pressure of the system by installing a pressure increasing means for increasing the pressure of the refrigerant.

Description

Heat pump system for vehicle

The present invention relates to a vehicle heat pump system, and more particularly, in a heat pump system in which an evaporator is installed in a cold air passage in an air conditioning case and an air-cooled condenser is installed in a hot air passage, in the refrigerant circulation line at the outlet side of the air-cooled condenser It relates to a vehicle heat pump system in which a pressure increasing means for increasing the pressure of a refrigerant is installed.

As shown in FIG. 1, a general vehicle air conditioner system generally includes a compressor (1) for compressing and sending out a refrigerant, a condenser (2) for condensing a high-pressure refrigerant sent from the compressor (1), For example, an expansion valve 3 for throttling the liquefied refrigerant condensed in the condenser 2, and the low-pressure liquid refrigerant throttled by the expansion valve 3 exchanges heat with air blown into the vehicle interior. It consists of a refrigeration cycle in which an evaporator (4) that cools the air discharged into the room due to the endothermic action by the latent heat of evaporation of the refrigerant by evaporating the refrigerant is connected by a refrigerant pipe. to cool

When the cooling switch (not shown) of the air conditioner system is turned on, first, the compressor 1 is driven by the power of the engine or motor while suctioning and compressing the low-temperature and low-pressure gaseous refrigerant to convert the high-temperature and high-pressure gaseous state into the condenser 2 ), and the condenser 2 condenses the gaseous refrigerant into a high-temperature and high-pressure liquid by exchanging heat with the outside air. Then, the liquid refrigerant sent from the condenser 2 in a high-temperature and high-pressure state is rapidly expanded by the throttling action of the expansion valve 3 and is sent to the evaporator 4 in a low-temperature and low-pressure wet state, and the evaporator 4 is the The refrigerant exchanges heat with air blown into the vehicle interior by a blower (not shown). Accordingly, the refrigerant evaporates in the evaporator 4 and is discharged in a gaseous state of low temperature and low pressure, and is again sucked into the compressor 1 to recirculate the refrigeration cycle as described above.

The evaporator is installed inside the air conditioning case installed on the inside of the vehicle and plays a cooling role, that is, the liquid air blown by a blower (not shown) circulates in the evaporator 4 while passing through the evaporator 4 . It is cooled by the latent heat of evaporation of the refrigerant and discharged into the vehicle interior in a cooled state.

In addition, the heating of the vehicle interior uses a heater core (not shown) installed inside the air conditioning case and circulating engine coolant, or an electric heating type heater (not shown) installed inside the air conditioning case. .

On the other hand, the condenser 2 is installed on the front side of the vehicle to radiate heat while exchanging heat with air.

Recently, a heat pump system that performs cooling and heating using only a refrigeration cycle has been developed. As shown in FIG. 2 , a cold air passage 11 and a hot air passage 12 inside one air conditioning case 10 ) is divided into left and right, an evaporator 4 for cooling is installed in the cold air passage 11 , and a condenser 2 for heating is installed in the warm air passage 12 .

At this time, an air outlet 15 for supplying air to the inside of the vehicle and an air outlet 16 for discharging air to the outside of the vehicle are formed on the outlet side of the air conditioning case 10 .

In addition, blowers 20 that operate individually are installed at each inlet side of the cold air passage 11 and the hot air passage 12 .

Therefore, in the cooling mode, the cold air cooled while passing through the evaporator 4 of the cold air passage 11 is discharged into the vehicle interior through the air outlet 15 to be cooled, and at this time, the condenser ( 2) The warm air heated while passing through is discharged to the outside of the vehicle through the air outlet 16 .

In the heating mode, the hot air heated while passing through the condenser 2 of the hot air passage 12 is discharged into the vehicle interior through the air outlet 15 to heat, and at this time, the evaporator 4 of the cold air passage 11 ), the cold air cooled while passing through the air outlet 16 is discharged to the outside of the vehicle.

In the dehumidification mode, the dehumidification is performed simultaneously with cooling by supplying the dried cool air that has passed through the evaporator 4 into the interior of the vehicle by operating it like the cooling mode.

In addition, in the conventional heat pump system, the evaporator 4 and the condenser 2 are disposed inside the air conditioning case 10 , and the compressor 1 and the expansion valve 3 are disposed outside the air conditioning case 10 . ) are arranged and connected to each other through a refrigerant circulation line (refrigerant pipe).

However, in the conventional heat pump system, since the refrigerant pressure of the system is low in the heating mode, the heating heat source required in the vehicle interior is insufficient, and thus there is a limit in improving the heating performance.

An object of the present invention to solve the above problems is to provide a refrigerant pressure in the refrigerant circulation line at the outlet side of the air-cooled condenser in a heat pump system in which an evaporator is installed in a cold air passage in an air conditioning case and an air-cooled condenser is installed in a hot air passage. An object of the present invention is to provide a vehicle heat pump system capable of improving heating performance by increasing the refrigerant pressure of the system by installing a pressure increasing means for raising the pressure.

The present invention for achieving the above object is a heat pump system for a vehicle in which a compressor, an air-cooled condenser, an expansion means, and an evaporator are connected through a refrigerant circulation line, a cold air passage and a hot air passage are partitioned therein, and the cold air passage It is characterized in that it comprises an air conditioning case in which the evaporator is installed and the air-cooled condenser is installed in the warm air passage, and a pressure increasing means installed in the refrigerant circulation line at the outlet side of the air-cooled condenser to increase the pressure of the refrigerant.

In a heat pump system in which an evaporator is installed in a cold air passage in an air conditioning case and an air-cooled condenser is installed in the hot air passage, the receiver dryer is a pressure increasing means for increasing the pressure of the refrigerant in the refrigerant circulation line at the outlet side of the air-cooled condenser. By installing the system, it is possible to improve the heating performance by increasing the refrigerant pressure of the system.

1 is a block diagram showing a refrigeration cycle of a general vehicle air conditioner system;
2 is a configuration diagram schematically showing a conventional vehicle heat pump system;
3 is a configuration diagram schematically showing a vehicle heat pump system according to the present invention;
4 is a configuration diagram showing a case in which a first bypass line and a first directional selector valve are added in FIG. 3;
5 is a configuration diagram showing a case in which a water-cooled condenser is added in FIG. 4;
6 is a configuration diagram showing a cooling mode of the vehicle heat pump system according to the present invention;
7 is a configuration diagram showing a heating mode of the vehicle heat pump system according to the present invention;
8 is a PH diagram of a heat pump system according to the present invention and a conventional heat pump system.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown, the vehicle heat pump system according to the present invention connects the compressor 100 -> air-cooled condenser 101 -> expansion means 103 -> evaporator 104 to the refrigerant circulation line (R), Cooling is performed through the evaporator 104 and heating is performed through the air-cooled condenser 101 .

First, the compressor 100 receives power from a power supply source (engine or motor, etc.) and operates while suctioning and compressing the low-temperature and low-pressure gaseous refrigerant discharged from the evaporator 104 to discharge it in a high-temperature and high-pressure gaseous state.

The air-cooled condenser 101 exchanges heat between the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 100 and flowing in the air-cooled condenser 101 and the air passing through the air-cooled condenser 101 , this process The refrigerant is condensed, and the air is heated and turned into warm air.

The air-cooled condenser 101 has a structure in which a heat dissipation fin (not shown) is installed after configuring a refrigerant purification line (R; refrigerant pipe) in a zigzag form, or a plurality of tubes (not shown) between a pair of header tanks. It can be configured as a structure in which a heat dissipation fin is installed between each tube.

Therefore, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 100 is condensed by heat exchange with air while flowing along the zigzag-shaped refrigerant circulation line or a plurality of tubes, and at this time, the air passing through the air-cooled condenser 101 is heated It will turn into a warm breeze.

Then, the expansion means 103 rapidly expands the liquid refrigerant discharged from the air-cooled condenser 101 and flowing through a throttling action to send it to the evaporator 104 in a low-temperature, low-pressure, wet-saturated state.

As the expansion means 103, an expansion valve or an orifice structure may be used.

The evaporator 104 heats the low-pressure liquid refrigerant discharged from the expansion means 103 and flows with the air in the air conditioning case 110 and evaporates it, thereby cooling the air by endothermic action due to the latent heat of evaporation of the refrigerant.

Subsequently, the low-temperature, low-pressure gaseous refrigerant evaporated and discharged from the evaporator 104 is again sucked into the compressor 100 to recirculate the cycle as described above.

In addition, in the refrigerant circulation process as described above, in the cooling of the vehicle interior, the air blown from the blower 130 flows into the air conditioning case 110 and passes through the evaporator 104 while circulating the inside of the evaporator 104 . It is cooled by the latent heat of evaporation of the liquid refrigerant and discharged into the vehicle interior in a cool state,

In the heating of the vehicle interior, the air blown by the blower 130 flows into the air conditioning case 110 and passes through the air-cooled condenser 101 . This is achieved by being heated and discharged into the interior of the vehicle in a hot state.

In addition, the air conditioning case 110 has a cold air passage 111 and a hot air passage 112 by a partition wall 113 dividing the inside of the air conditioning case 110 between the inlet and the outlet of the air conditioning case 110 . is formed into a compartment.

The partition wall 113 has a cold air passage 111 and a hot air passage 112 inside the air conditioning case 110 by turning the inner passage of the air conditioning case 110 to the left and right as shown in FIG. It may be formed by partitioning it to the right, and although not shown in the drawing, the inside of the air conditioning case 110 may be partitioned up and down to form the cold air passage 111 and the warm air passage 112 up and down.

In addition, the evaporator 104 is installed in the cold air passage 111, and the air-cooled condenser 101 is installed in the warm air passage 112. At this time, the evaporator 104 and the air-cooled condenser 101 are air They are installed spaced apart from each other in the flow direction.

A bypass passage 114 for communicating the hot air passage 112 and the cold air passage 111 is formed through the partition wall 113, and a bypass passage 114 is formed in the bypass passage 114. A bypass door 115 to open and close is installed.

At this time, depending on the position of the evaporator 104 and the air-cooled condenser 101 and the position of the bypass passage 114, the warm air in the hot air passage 112 may be bypassed toward the cold air passage 111 side, or The cold air in the cold air passage 111 may be bypassed toward the warm air passage 112 .

In the drawing, as an example, bypass passages 114 are formed on the upstream and downstream partition walls 113 of the air-cooled condenser 101, and in this case, bypass doors installed in each bypass passage 114 ( 115) to bypass the cold air of the cold air passage 111 toward the warm air passage 112 or bypass the warm air of the hot air passage 112 toward the cold air passage 111 by adjusting the 115.

For example, in the cooling mode in a state in which the bypass door 115 closes the bypass passage 114, the cold air cooled by the evaporator 104 is supplied into the vehicle while flowing through the cold air passage 111. The cooling is performed, and in the heating mode, the hot air heated by the air-cooled condenser 101 is supplied into the vehicle interior while flowing through the hot air passage 112 to perform heating.

In addition, in the cooling mode, when the bypass door 115 opens the bypass passage 114 , a part of the cold air cooled by the evaporator 104 while flowing through the cold air passage 111 is the bypass By bypassing the hot air passage 112 through the passage 114 and supplying it to the air-cooled condenser 101, the air-cooled condenser 101 smoothly radiates heat, thereby lowering the refrigerant temperature and improving the cooling performance. .

In addition, the evaporator 104 is installed on the upstream side of the bypass passage 114 in the air flow direction in the cold air passage 111 .

A blower 130 for blowing air to the cold air passage 111 and the warm air passage 112 is installed at the inlet side of the air conditioning case 110 .

The blower 130 includes a first blower 130a installed on the inlet side of the cold air passage 111 of the air conditioning case 110 to blow air toward the cold air passage 111, and the air conditioning case 110. It is installed on the inlet side of the warm air passage 112 and consists of a second blower (130b) for blowing air toward the warm air passage (112).

A motor (not shown) and a blowing fan (not shown) are installed in the first blower 130a and the second blower 130b, respectively, and an intake duct (not shown) for introducing internal and external air may also be installed. have.

Of course, one intake duct may be installed so that the first and second blowers 130a and 130b may use it in common.

And, the outlet of the cold air passage 111 of the air conditioning case 110 is a cold air outlet 111a for discharging cool air into the interior of the vehicle in the cooling mode, and a cold air outlet 111b for discharging the cold air to the outside in the heating mode. composed,

The outlet of the hot air passage 112 of the air conditioning case 110 is composed of a hot air outlet 112a for discharging hot air into the interior of the vehicle in heating mode, and a hot air outlet 112b for discharging hot air to the outside in cooling mode. .

In addition, a cold air mode door 120 for opening and closing the cold air outlet 111a and the cold air outlet 111b is provided, and a warm air mode door 121 for opening and closing the hot air outlet 112a and the warm air outlet 112b. is provided

Accordingly, in the cooling mode, as shown in FIG. 6 , the cold air outlet 111a and the hot air outlet 112b are opened, and the air flowing through the cold air passage 111 passes through the evaporator 104 and is cooled, followed by cold air. The air flowing through the hot air passage 112 is heated while passing through the air-cooled condenser 101, and then discharged to the outside of the vehicle through the hot air outlet 112b. will become

In the heating mode, as shown in FIG. 7 , the hot air outlet 112a and the cold air outlet 111b are opened, and the air flowing through the hot air passage 112 is heated while passing through the air-cooled condenser 101 and then the hot air outlet The air flowing through the cold air passage 111 is cooled while passing through the evaporator 104, and then is discharged to the outside of the vehicle through the cold air outlet 111b. .

In addition, a pressure increasing means 140 for increasing the refrigerant pressure of the system is installed in the refrigerant circulation line R on the outlet side of the air-cooled condenser 101 .

The pressure increasing means 140 is composed of a receiver dryer 141 that separates and stores gaseous refrigerant and liquid refrigerant from the refrigerant circulating in the refrigerant circulation line R, and discharges the liquid refrigerant.

The receiver dryer 141 is installed in the refrigerant circulation line (R) between the air-cooled condenser 101 and the expansion means 103, and not only serves to store the liquid refrigerant, but also flows the refrigerant circulation line (R) By acting as a resistance to the refrigerant, the pressure of the refrigerant in the system is increased, thereby improving the heating performance.

8 is a PH diagram of the heat pump system and the conventional heat pump system according to the present invention, and as in the present invention, the pressure increasing means 140 is the receiver in the refrigerant circulation line R on the outlet side of the air-cooled condenser 101. When the dryer 141 is installed, it can be seen that the heating performance is improved by increasing the refrigerant pressure of the system by raising the PH curve compared to the prior art without the pressure increasing means.

And, as shown in FIG. 4, the refrigerant circulation line (R) is connected to the inlet side refrigerant circulation line (R) and the outlet side refrigerant circulation line (R) of the receiver dryer 141, which is the pressure increasing means 140, A first bypass line (R1) for allowing the refrigerant to bypass the receiver dryer 141 is installed,

A first direction switching valve 145 for switching the flow direction of the refrigerant is installed at the branch point of the refrigerant circulation line (R) and the first bypass line (R1).

That is, by installing the first bypass line (R1) and the first direction switching valve (145), the refrigerant circulating in the refrigerant circulation line (R) to improve the cooling and heating performance of the system is transferred to the receiver dryer (141). ) can be optionally passed.

In addition, at one side of the air-cooled condenser 101, an auxiliary receiver drier 102 that separates and stores a gaseous refrigerant and a liquid refrigerant from the refrigerant flowing through the air-cooled condenser 101 and discharges the liquid refrigerant is installed.

That is, the air-cooled condenser 101 is divided into two heat exchange areas, and the auxiliary receiver dryer 102 is connected to the refrigerant circulation line R connecting the two heat exchange areas. In this case, an upstream area of the auxiliary receiver dryer 102 among the two heat exchange areas is set as a condensation area, and a downstream area of the auxiliary receiver dryer 102 is set as a subcooling area.

As such, there is an advantage that the sub-receiver dryer 102 downstream air-cooled condenser 101 area can be utilized as a supercooling area through the auxiliary receiver dryer 102 .

And, as shown in FIG. 5, in the refrigerant circulation line R between the compressor 100 and the air-cooled condenser 101, a water-cooled condenser 106 for condensing the refrigerant discharged from the compressor 100 and flowing through heat exchange with the cooling water. ) is connected and installed.

The water-cooled condenser 106 heats the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 100 and flowing with cooling water to condense and discharge the liquid refrigerant.

The water-cooled condenser 106 is configured such that the refrigerant passage 106a through which the refrigerant discharged from the compressor 100 flows and the cooling water passage 106b through which the coolant circulating in the vehicle electrical equipment 220 flows can exchange heat with each other. and heat exchange between the refrigerant and the cooling water.

The water-cooled condenser 106 is preferably configured as a plate heat exchanger having a refrigerant passage 106a and a cooling water passage 106b alternately.

In addition, the water-cooled condenser 106 is connected to the vehicle electrical components 220 and the water pump 200 through a cooling water circulation line W, and the cooling water circulating the vehicle electrical components 220 is supplied to the water-cooled condenser (106). will be cycled to

In addition, a water cooling radiator 210 for cooling the cooling water by heat exchange with air is installed in the cooling water circulation line (W).

Meanwhile, a cooling water bypass line W1 is installed in the cooling water circulation line W so that the cooling water circulating in the cooling water circulation line W can bypass the electrical equipment 220 .

The cooling water bypass line (W1) is installed to connect the inlet side cooling water circulation line (W) and the outlet side cooling water circulation line (W) of the electrical equipment 220, and the cooling water bypass line (W1) and the cooling water circulation A cooling water direction switching valve 230 is installed at the branch point of the line (W).

The cooling water direction switching valve 230 circulates the cooling water to the electrical component 220 when cooling of the electrical component 220 is required, and when cooling of the electrical component 220 is not required, the cooling water is supplied to the cooling water bypass line It circulates to (W1) side.

Accordingly, when the water pump 200 is operated, the coolant circulating in the coolant circulation line W flows through the coolant flow passage 106b of the water-cooled condenser 106. The coolant flow path of the water-cooled condenser 106. Heat exchange with the refrigerant flowing through (106a), and in this process, the refrigerant flowing through the water-cooled condenser 106 is cooled and condensed.

The refrigerant condensed in the water-cooled condenser 106 flows to the air-cooled condenser 101 and is cooled again while exchanging heat with the air flowing through the hot air passage 112 of the air conditioning case 110 .

In this way, by additionally configuring the water-cooled condenser 106 as well as the air-cooled condenser 101, many heat dissipation heat sources can be used, and accordingly, it is possible to lower the heat dissipation performance of the air-cooled condenser 101. 101) can be reduced, and the air volume and size of the blower 130 can be reduced accordingly, thereby reducing the overall size of the system.

And, a second bypass line (R2) connecting the inlet side refrigerant circulation line (R) and the outlet side refrigerant circulation line (R) of the water-cooled condenser 106 is installed,

A second direction switching valve 107 is installed at the branch point of the refrigerant circulation line (R) and the second bypass line (R2) to switch the flow direction of the refrigerant according to the cooling/heating mode.

The second direction switching valve 107 switches the flow direction so that the refrigerant discharged from the compressor 100 flows toward the water-cooled condenser 106 in the cooling mode, and in the heating mode, in the compressor 100 The discharged refrigerant flows toward the second bypass line R2 and changes the flow direction to bypass the water-cooled condenser 106 .

That is, in the cooling mode, by using both the water-cooled condenser 106 and the air-cooled condenser 101 to use a large number of radiating heat sources, the temperature of the refrigerant can be further lowered, thereby improving the cooling performance.

At this time, the cooling water circulating in the water cooling radiator 210 and the electrical equipment 220 of the cooling water circulation line W circulates to the water cooling condenser 106 to exchange heat with the refrigerant.

In the heating mode, since the refrigerant circulates through the second bypass line R2, the refrigerant does not flow to the water-cooled condenser 106, and heating performance is realized using only the heat source of the air-cooled condenser 101, so heating performance is achieved. can improve

And, in the refrigerant circulation line (R) between the water-cooled condenser 106 and the air-cooled condenser 101, the gaseous refrigerant and the liquid refrigerant are separated from the refrigerant discharged from the water-cooled condenser 106 and flowing, and the liquid refrigerant is stored. The auxiliary receiver dryer 108 for discharging is connected and installed.

That is, in FIG. 4, the auxiliary receiver dryer 102 is connected to one side of the air-cooled condenser 101, but when the water-cooled condenser 106 is installed as shown in FIG. 5, the auxiliary receiver dryer 108 is the water-cooled type. It is preferably installed between the condenser 106 and the air-cooled condenser 101 .

As such, when the auxiliary receiver dryer 108 is installed between the water-cooled condenser 106 and the air-cooled condenser 101, the water-cooled condenser 106 installed on the upstream side of the auxiliary receiver dryer 108 is completely condensed. The air-cooled condenser 101 installed on the downstream side of the auxiliary receiver dryer 108 is set as a sub-cooling region as a whole.

On the other hand, in the heating mode, the refrigerant flows to the second bypass line R2 and the refrigerant bypasses the water-cooled condenser 106 as well as the auxiliary receiver dryer 108 .

In addition, an accumulator 105 is installed in the refrigerant circulation line R on the inlet side of the compressor 100 .

The accumulator 105 separates and stores the gaseous refrigerant and the liquid refrigerant from the refrigerant circulating in the refrigerant circulation line R, and discharges the gaseous refrigerant to the compressor 100 side.

As such, the accumulator 105 supplies only the gaseous refrigerant to the compressor 100 and blocks the supply of the liquid refrigerant to prevent damage to the compressor 100 .

Hereinafter, a refrigerant flow process of the vehicle heat pump system according to the present invention will be described with reference to FIG. 5 .

First, the high-temperature and high-pressure gaseous refrigerant compressed and discharged from the compressor 100 flows into the refrigerant passage 106a of the water-cooled condenser 106 .

The gaseous refrigerant introduced into the refrigerant passage 106a of the water-cooled condenser 106 is circulated through the water-cooled radiator 210 and the electrical equipment 220 while the coolant introduced into the cooling water passage 106b of the water-cooled condenser 106 and It exchanges heat, and in this process, the refrigerant is cooled and phase-changed into a liquid phase.

The refrigerant discharged from the water-cooled condenser 106 flows into the auxiliary receiver dryer 108 to separate the gaseous refrigerant and the liquid refrigerant, and the liquid refrigerant flows into the air-cooled condenser 101 .

The refrigerant introduced into the air-cooled condenser 101 is cooled (supercooled) once more through heat exchange with the air flowing through the hot air passage 112 of the air conditioning case 110, and then the pressure increasing means 140 is the receiver. As it passes through the dryer 141, the refrigerant pressure rises.

Subsequently, the refrigerant that has passed through the receiver dryer 141 flows into the expansion means 103 and expands under reduced pressure.

The refrigerant expanded under reduced pressure in the expansion means 103 becomes an atomized state of low temperature and low pressure and flows into the evaporator 104 , and the refrigerant introduced into the evaporator 104 is a cold air passage 111 of the air conditioning case 110 . ) is evaporated by heat exchange with the flowing air.

Thereafter, the low-temperature and low-pressure refrigerant discharged from the evaporator 104 flows into the accumulator 105 to separate the vapor-phase refrigerant and the liquid refrigerant, and only the vapor-phase refrigerant is discharged.

The gaseous refrigerant discharged from the accumulator 105 flows into the compressor 100 and then recirculates the refrigeration cycle as described above.

Hereinafter, the air flow process in the cooling mode and the heating mode will be described.

go. Cooling mode (Fig. 6)

In the cooling mode, as shown in FIG. 6 , the cold air mode door 120 opens the cold air outlet 111a, and the warm air mode door 121 opens the warm air outlet 112b.

In addition, air is blown into the cold air passage 111 and the warm air passage 112 of the air conditioning case 110 through the blower 130 .

Subsequently, the air blown through the cold air passage 111 of the air conditioning case 110 exchanges heat with the evaporator 104 to change to cold air, and then is discharged into the vehicle interior through the cold air outlet 111a to cool the vehicle interior. will do

In addition, the air blown through the hot air passage 112 of the air conditioning case 110 is heated while passing through the air-cooled condenser 101 and is changed to hot air, and the warm air is discharged to the outside through the warm air outlet 112b. do.

me. Heating mode (Fig. 7)

In the heating mode, as shown in FIG. 7 , the cold air mode door 120 opens the cold air outlet 111b, and the warm air mode door 121 opens the warm air outlet 112a.

In addition, air is blown into the cold air passage 111 and the warm air passage 112 of the air conditioning case 110 through the blower 130 .

Subsequently, the air blown through the cold air passage 111 of the air conditioning case 110 exchanges heat with the evaporator 104 to change to cold air, and then is discharged to the outside through the cold air outlet 111b.

In addition, the air blown through the warm air passage 112 of the air conditioning case 110 is heated while passing through the air-cooled condenser 101 and is changed to hot air, and the warm air is discharged into the vehicle interior through the warm air outlet 112a. This will heat the interior of the car.

100: compressor 101: air-cooled condenser
102: auxiliary receiver dryer 103: expansion means
104: evaporator 105: accumulator
106: water-cooled condenser 107: second direction switching valve
108: auxiliary receiver dryer
110: air conditioning case 111: cold air passage
112: hot air passage 113: partition wall
114: bypass passage 115: bypass door
111a: cold air outlet 111b: cold air outlet
112a: hot air outlet 112b: warm air outlet
120: cold air mode door 121: warm air mode door
130: blower 130a: first blower
130b: second blower
140: pressure rising means 141: receiver dryer
145: first direction switching valve 200: water pump
210: water cooling radiator 220: electronics
230: coolant directional valve
R: Refrigerant circulation line R1: First bypass line
R2: Second bypass line W: Cooling water circulation line
W1: coolant bypass line

Claims (11)

In the heat pump system for a vehicle, the compressor 100, the air-cooled condenser 101, the expansion means 103, and the evaporator 104 are connected by a refrigerant circulation line (R),
A cold air passage 111 and a hot air passage 112 are partitioned therein, the evaporator 104 is installed in the cold air passage 111, and the air-cooled condenser 101 is installed in the hot air passage 112. 110, a blower 130 installed in the air conditioning case 110 to blow air to the cold air passage 111 and the hot air passage 112, and the refrigerant between the compressor 100 and the air-cooled condenser 101 It is installed in the circulation line (R) and includes a water-cooled condenser 106 for condensing the refrigerant discharged from the compressor 100 by heat exchange with cooling water,
A second bypass line (R2) connecting the refrigerant circulation line (R) on the inlet side of the water-cooled condenser (106) and the refrigerant circulation line (R) on the outlet side of the water-cooled condenser (106), and the second bypass line ( R2) and a second direction switching valve 107 installed at the branch point of the refrigerant circulation line (R) to switch the flow direction of the refrigerant,
In the refrigerant circulation line (R) between the water-cooled condenser 106 and the air-cooled condenser 101, the gas-phase refrigerant and the liquid refrigerant are separated from the flowing refrigerant discharged from the water-cooled condenser 106 and stored, and the auxiliary receiver for discharging the liquid refrigerant The dryer 108 is connected and installed,
The inlet of the second bypass line R2 is installed between the side inlet of the compressor 100 and the water-cooled condenser 106, and the outlet of the second bypass line R2 is an auxiliary receiver dryer 108 and an air-cooled type. Installed between the condenser 101,
The water-cooled condenser 106 installed on the upstream side of the auxiliary receiver dryer 108 is set as the condensation area, and the air-cooled condenser 101 installed on the downstream side of the auxiliary receiver dryer 108 is set as the supercooling area. Vehicle heat pump system. The method of claim 1,
and a receiver dryer (141) that separates and stores gaseous refrigerant and liquid refrigerant from the refrigerant circulating in the refrigerant circulation line (R) and discharges the liquid refrigerant. 3. The method of claim 2,
In the refrigerant circulation line (R), by connecting the inlet side refrigerant circulation line (R) and the outlet side refrigerant circulation line (R) of the receiver dryer 141 to bypass the refrigerant to the receiver dryer (141) 1 Bypass line (R1) is installed,
A heat pump system for a vehicle, characterized in that a first direction switching valve (145) for switching the flow direction of the refrigerant is installed at the branch point of the refrigerant circulation line (R) and the first bypass line (R1). The method of claim 1,
At one side of the air-cooled condenser 101, an auxiliary receiver dryer 102 that separates and stores a gaseous refrigerant and a liquid refrigerant from the refrigerant flowing through the air-cooled condenser 101 and discharges the liquid refrigerant is connected and installed. heat pump system. delete The method of claim 1,
The water-cooled condenser (106) is a vehicle heat pump system, characterized in that it is connected to the vehicle electrical equipment (220) and the water pump (200) through a coolant circulation line (W). delete The method of claim 1,
The second direction switching valve 107,
In the cooling mode, the flow direction is changed so that the refrigerant discharged from the compressor 100 flows to the water-cooled condenser 106 side,
In the heating mode, the refrigerant discharged from the compressor (100) flows to the second bypass line (R2) side, and the flow direction is changed to bypass the water-cooled condenser (106). delete The method of claim 1,
A first blower 130a installed on the inlet side of the cold air passage 111 of the air conditioning case 110 to blow air toward the cold air passage 111, and the hot air passage 112 inlet side of the air conditioning case 110 The vehicle heat pump system, characterized in that it further comprises a blower (130) consisting of a second blower (130b) installed in the hot air passage (112) for blowing air. The method of claim 1,
The outlet of the cold air passage 111 of the air conditioning case 110 is composed of a cold air outlet 111a for discharging cold air into the interior of the vehicle in cooling mode, and a cold air outlet 111b for discharging cold air to the outside in heating mode. ,
The outlet of the hot air passage 112 of the air conditioning case 110 is composed of a hot air outlet 112a for discharging hot air into the interior of the vehicle in heating mode, and a hot air outlet 112b for discharging hot air to the outside in cooling mode. A vehicle heat pump system.

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