KR100303821B1 - Air conditioning apparatus for motor vehicle - Google Patents

Abstract

PURPOSE: An air conditioning apparatus for motor vehicle is provided to achieve improved cooling/heating efficiency for passenger compartment by controlling the air flowing through the air conditioning duct. CONSTITUTION: An air conditioning apparatus comprises a duct(70) including a first section(71) for introduction of air; a second section(72) communicated to the first section, and which has a first path(72a) and a second path(72b); a third section(73) communicated to the second section, and which passes the air passed through the first path and second path of the second section; a fourth section(74) communicated to the third section, and which has a third path(74a) and a fourth path(74b); and an open/shut unit(80) for controlling an air flow path in such a manner that the air introduced into the first section passes through the second path of the second section, the third section and the third path of the fourth section during heating operation, and controlling an air flow path in such a manner that the air introduced into the first section passes through the first path of the second section, the third section and the fourth path of the fourth section during heating operation. An auxiliary condenser(52) is arranged at the first path of the second section, and an evaporator(51) is arranged at the third path of the fourth section. A bypass unit(90) for partially bypassing the air passed through the evaporator is arranged in the rear side of the third path of the fourth section.

Description

Automotive Air Conditioning Units

1 is a schematic diagram showing a conventional automotive air conditioner.

2 is a schematic view showing another embodiment of a conventional automotive air conditioner.

3 and 4 are schematic diagrams showing a vehicle air conditioner according to the present invention.

5 is a schematic diagram showing an air conditioner for a vehicle according to another embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

51: evaporator 52: auxiliary condenser

53: Compressor 54: Main Condenser

55: first connector 57: second connector

58: three-way valve 59: third connector

70,100: Duct 70, 101: Section 1

72, 102: Second section 73: Third section

74: fourth section 80, 110: opening and closing means

90, 120: bypass means

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner, and more particularly, to an air conditioner for an electric vehicle using the principle of a heat pump.

As the environmental problem based on the global greenhouse effect has become a global concern, automobile companies and automobile related organizations around the world can replace gasoline cars, which are considered as the main causes of pollution, namely electric cars and hydrogen cars. In addition, the company is devoted to the development of automobiles using solar cells, and in addition to these trends, automobile and household air conditioners are also making efforts to develop air conditioners using alternative refrigerants.

Of these pollution-free vehicles, electric vehicles are the most advanced, and the air conditioners applied to these electric vehicles are not able to obtain a heating source by engine coolant like gasoline engine vehicles. Equipped with or using the principle of the heat pump.

1 shows an example of an air conditioner using the principle of a heat pump in such a cooling device.

The indoor heat exchanger 12 and the outdoor heat exchanger 13 are respectively installed inside and outside the duct 11, and the indoor and outdoor heat exchanger 12 and 13 are closed by a first connecting pipe 15 through which a heat exchange medium flows. The first connection pipe 15 is provided with a compressor 27, which is a four-way valve 18 that can switch the flow direction of the heat exchange refrigerant flowing in the indoor and outdoor heat exchanger (12) (13) And is installed by the second connecting pipe (19). In addition, a separate heat transfer heater 14 is further provided at a rear portion of the indoor heat exchanger 12 in the air conditioning duct 11. Reference numeral 20 is a door.

In the conventional air conditioner configured as described above, the indoor heat exchanger 12 serves as an evaporator during cooling and the outdoor heat exchanger 13 serves as a radiator, and the indoor heat exchanger 12 serves as a radiator during heating. The four-way valve 18 is switched to the circulation direction of the heat exchange medium to perform the cooling and heating operation so that the heat exchanger 13 may serve as an evaporator.

However, such a conventional air conditioner in the indoor heat exchanger 12 when the indoor heat exchanger performs only one of cooling or heating, when the air conditioning apparatus of the water-cooled engine-mounted vehicle performs anti-fog of the glass window during cooling. Since the air must be reheated by using the heat transfer heater 14 separately installed, there is a problem in that power consumption increases due to heating and cooling.

In order to solve such a problem, as shown in FIG. 2, a partition wall 22 is formed in the duct 21 to form at least two air passages, and a passage formed separately by the partition wall 22 is provided. The front of the door 23 is installed to selectively control the flow of air to each passage. An auxiliary condenser 26 is installed at one side of the passage separated by the partition wall 22, and an evaporator 25 is installed at an inlet side of the duct 21. The evaporator 25 and the auxiliary condenser 26 are connected by the compressor 27 and the first connecting pipe 28 to form a closed circuit, and the first connection between the compressor 27 and the auxiliary condenser 26 is performed. The pipe 28 is provided with a main condenser 29 located on the outdoor side, and the first connection pipe 28 connecting the inlet side and the outlet side of the main condenser 29 has a first connection tube 28 on the inlet side. It is connected by the three-way valve 31 and the second connecting pipe (32) installed in the).

The conventional automotive air conditioner configured as described above has a main mode connected to the compressor 27 to block the passage in which the auxiliary 23 is rotated when the door 23 is rotated when the vent mode is in the vent mode. The heat exchange medium passes through the condenser 29 and the evaporator 25. Therefore, the air flowing through the air conditioning duct is cooled while passing through the evaporator 25 is supplied to the interior of the vehicle. In the heating operation, the three-way valve 31 is closed to form a separate closed circuit so that the heat exchange medium pumped by the compressor 27 flows through the auxiliary condenser 26 and the evaporator 25. Then, the door 23 is operated to open a passage in which the auxiliary condenser 26 is installed. In this way, the air flowing into the air conditioning duct is primarily cooled by the evaporator 25 and then heated by the auxiliary condenser 26 to be supplied to the interior of the vehicle. At this time, the amount of heat absorbed by the evaporator 25 is less than the amount of heat radiated by the auxiliary condenser 26. That is, since the heat exchange medium passing through the auxiliary condenser 26 includes the amount of heat absorbed from the evaporator 25 and the compression work of the compressor 27, the amount of heat dissipation from the auxiliary condenser 26 is large. Will be able to heat.

However, such a conventional air conditioner for automobiles is the air supplied to the inside of the air conditioning duct 21 from the outside in the heating mode is cooled in the evaporator 25 and heated by the auxiliary condenser 26 and then through the car through the duct Since it is supplied to the interior of the room can not obtain a satisfactory heating performance, there was a problem that must circulate the indoor air of the car to maintain the temperature inside the car at a predetermined temperature.

The present invention has been made to solve the above problems, an object of the present invention is to provide a vehicle air conditioner that can improve the air-conditioning efficiency of the vehicle interior by controlling the flow of air flowing into the air conditioning duct.

In order to achieve the above object, the present invention provides a duct for distributing air in one direction, a compressor and a main condenser constituting an air conditioning circuit with an evaporator and an auxiliary condenser, an evaporator and an auxiliary condenser located in the duct, and an air conditioning circuit. An air conditioner for a vehicle having a valve for controlling a flow of a coolant to determine a flow of a coolant selectively to the auxiliary condenser and the main condenser, the duct comprising: a first section through which air is introduced; A second section continuous to the first section and having two independent first and second parallel passages; A third section continuous to the second section and through which air passing through the first passage and the second passage of the second section pass; A fourth section that is continuous to the third section and has two independent third and fourth passages; and further, in the duct, air introduced into the first section when cooling the first section; In addition, the air flows into the first section and the first passage of the second section and the third section. Section-specific passage opening and closing means for controlling the distribution path of the air is provided so that the distribution path connecting the fourth passage is provided, the auxiliary condenser has a first in the second section in which the air inlet side is continuous in the first section On the passage and the evaporator is provided on the third passage of the fourth section through which the air is discharged, and on the rear side of the third passage is provided with bypass means for bypassing some of the air passing through the evaporator during heating. It is characterized by that.

Another feature of the present invention is a duct for circulating air in one direction, an evaporator and an auxiliary condenser located in the duct, a compressor and a main condenser constituting the refrigerant circuit and the evaporator and an auxiliary condenser, and a refrigerant provided on the refrigerant circuit. 1. An air conditioner for an automobile having a valve for controlling flow to determine a flow of refrigerant to be selectively made to the auxiliary condenser and the main condenser, wherein the duct is a first section formed of a single passage through which air is introduced; ; And a second section having two independent first passages and a second passage continuous to the first section, wherein the duct includes air introduced into the first section during cooling, when the air flows into the first section. In addition, the passage selectively opens and closes each section for controlling the flow path of air so that the air introduced into the first section can be distributed to the distribution route of the second passage of the second section. Means are provided, the condenser is installed on the first section of the air inlet side and the evaporator is installed on the first passage of the second section where air is discharged, and on the rear side of the second passage the evaporator on heating Bypass means for bypassing some of the air that has passed is provided.

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

As shown in FIG. 3, the automotive air conditioner according to the present invention is roughly divided into an air conditioning circuit 50 through which a heat exchange medium flows, and a duct 70 provided with an evaporator and an auxiliary condenser of the circuit.

In the air conditioning circuit 50, an evaporator 51 and an auxiliary condenser 52 are installed in the duct 70, and an outlet of the evaporator 51 and an inlet of the auxiliary condenser 52 are connected to the compressor 53 and the main. The condenser 54 is connected by the first connecting pipe 55 is installed. In addition, an inlet side of the evaporator 51 and an outlet of the auxiliary condenser 52 are connected by a second connecting tube 57 provided with a shank valve 56 and a first connection connected to the outlet side of the compressor 53. The pipe 55 is provided with a three-way valve 58, which is connected by a first connecting pipe 55 and a third connecting pipe 59 on the outlet side of the main condenser 54. The first connecting pipe 55 adjacent to the heat exchange medium inlet of the auxiliary condenser 52 switches the heat exchange medium flowing therethrough to selectively flow to the auxiliary condenser 52 or the second connection pipe 57. 60 is installed. At this time, it is preferable that the switching valve 60 uses a three-way valve.

In addition, the duct 70 in which the evaporator 51 and the auxiliary condenser 52 are installed has a first section 71 through which air is introduced, as shown in FIG. 3, and continues with the first section 71. The second section 72 is provided with two independent first and second passages 72a and 72b. And a third section 73 which is continuous with the second section 72 and through which the air passing through the first and second passages 72a and 72b passes through is formed and is continuous with the third section 73. A fourth section 74 in which two independent third and fourth passages 74a and 74b are arranged next to each other is provided. Here, the auxiliary condenser 52 of the air conditioning circuit 50 is installed in the first passage 72a of the second section 72 and the evaporator 51 is the first passage 74a of the fourth section 74. Is installed on. In addition, opening and closing means 80 are provided at front and rear ends of each passage to allow the air flowing into the first section 71 to selectively flow into the respective passages, and a rear end of the third passage 74a passes through the evaporator during cooling. Bypass means 90 is provided for bypassing a portion of the air.

The opening and closing means 80 for selectively opening and closing the passages is provided with first and second doors 81 and 82 at the front and rear exit sides of the second section 72 so that the first and second passages 72a and 72b are provided. It can be selectively opened and closed, and the third door (83) for selectively opening and closing it is provided on the inlet side of the third and fourth passages (74a, 74b) provided in the fourth section (74).

The bypass means 90 is for cooling the air passing through the third passage (74a) to the outside when the cooling, the bypass passage 91 is formed at the rear end of the third passage (74a) and the The inlet is provided with a fourth door 92 to selectively open and close the bypass passage 91.

In another embodiment of a vehicle air conditioner according to the present invention, the air conditioning circuit is the same as that described in the above-described embodiment, but the duct 100 is formed by the blower as shown in FIG. The first section 101 formed of a single passage is provided inside or outside air, and the first and second passages 102a and 102b which are continuous and independent of the first section 101 are formed in parallel with each other. The second section 102 is provided, and the opening and closing means 110 for opening and closing the air to selectively flow to the inlet side of the first and second passages 102a and 102b is the first and second passages 102a and 102b. The first door 111 is provided at the entrance side of the. Here, the evaporator 51 constituting the air conditioning circuit is installed in the first passage 101a and the auxiliary condenser 52 is installed in the first section 101. In addition, a bypass means 120 is installed at the rear side of the first passage 102a to bypass the air passing through the evaporator 51 at the time of cooling, and the bypass means 120 includes the first passage 102a. The bypass passage 121 is formed at the rear end of the door 122 and a door 122 is installed at the inlet side thereof.

Referring to the operation of the automotive air conditioner according to the present invention configured as described above are as follows.

First, during the cooling operation for cooling the interior of the vehicle, as shown in FIG. 3, the first door 81 installed in the duct 70 is operated to flow into the first section 71 of the duct 70. To allow the air to be introduced into the second passage 72b and to operate the second and third doors 82 and 83 to close the inlet of the fourth passage 74b and the outlet of the first passage 72a, respectively. do. In this state, by operating the 3-way valve 58 and the switching valve 60 of the air conditioning circuit, the heat exchange medium compressed from the compressor 53 passes through the auxiliary condenser 52 as shown by the first arrow 200. Instead of allowing heat to flow along the first connecting pipe 55, the second connecting pipe 57, and the evaporator 51, the heat is absorbed by the evaporator 51 to release heat from the main condenser 54. Therefore, the air flowing into the first section 71 of the air conditioning duct 70 is introduced into the third section 73 through the second passage 72b and the air passes through the third passage (4) of the fourth section 74. Cooled while passing through the evaporator 51 installed in 74a) is supplied to the interior of the vehicle.

In the heating operation for warming the interior of the automobile, as shown in FIG. 4, the first door 81 inside the duct 70 is operated to close the entrance of the second passage 72b and to close the first passage ( The entrance of 72a is opened and the third door 83 is operated to close a part of the third passage 74a and open the fourth passage 74b. The second door 82 is operated to close the outlet of the second passage 72b, open the outlet of the first passage 72a, and be provided by the fourth door 92 installed at the entrance of the bypass passage 91. Bypass passage 91 is opened. Then, the three-way valve 58 and the switching valve 60 of the air conditioning circuit are operated so that the heat exchange medium discharged from the compressor 53 does not pass through the main condenser 54 and the third connecting pipe 59 and the switching valve. It is introduced into the auxiliary condenser 52 through the 60 (see the indication of the refrigerant flow direction by the second arrow 300).

In this case, since the main heat dissipation occurs in the auxiliary condenser 52, the air introduced into the first section 71 of the duct 70 passes through the first passage 72a and is installed by the auxiliary condenser 52. After the heating, it is supplied to the interior of the vehicle through the fourth passage 74b of the third section 73 and the fourth section 74. At this time, since the third door 83 installed at the inlet of the third passage 74a is not completely closed, but only a part of the third passage 74a is closed, a part of the heating air passing through the auxiliary condenser 52 is passed through the evaporator. As it passes through (51), the heat exchange medium inside the evaporator absorbs the surrounding heat, and the air passing through the evaporator is cooled and then blown out through the bypass passage (92), thereby achieving continuous heat exchange. Will be able to heat the interior of the car.

In another embodiment according to the present invention as shown in FIG. 5, the air conditioning circuit 50 is operated as described above, and the auxiliary condenser may be installed in the first section 101. The heat exchange efficiency can be further improved.

As described above, the air conditioner for an electric vehicle using the principle of the heat pump of the present invention can prevent the deterioration of heating efficiency, which has been a problem in the past, by separating the air flow passage and the air flow passage during cooling the air conditioner duct. .

Claims (4)

A duct for circulating air in one direction, an evaporator and an auxiliary condenser located in the duct, a compressor and a main condenser constituting the refrigerant circuit and an evaporator and an auxiliary condenser, and a refrigerant provided on the refrigerant circuit to control the circulation of the refrigerant. In the air conditioner for a vehicle having a valve for determining to be made selectively with respect to the auxiliary condenser and the main condenser, The duct (70); The first section of the air is introduced; A second section 72 that is continuous to the first section 71 and has two independent first and second parallel passages 72a and 72b, and is continuous to the second section 72, and the second section 72 Two independent passages (3) connected to the third section (73) and the third section (73) through which air passing through the first passage (72a) and the second passage (72b) of (72) pass through each other; A fourth section 74 having 74a and a fourth passage 74b is provided, and in the duct 70, air introduced into the first section 71 is cooled in the duct 70. In addition, the air flowing into the first section 71 may be supplied to the distribution section connecting the second passage, the third segment, and the third passage. Sectional selective opening and closing means 80 for controlling the distribution path of the air is provided so that the distribution path connecting the first passage and the third section to the fourth passage is provided, and the auxiliary condenser has an air inlet side. The second continuous to the first section 71; On the first passageway 72a of the section 72 and the evaporator 51 is provided on the third passageway 74a of the fourth section 74 where air is discharged, and the third passageway 74a. The rear side of the) is provided with a bypass means for bypassing a portion of the air passing through the evaporator during heating 90 for a vehicle air conditioner. The bypass means (90) provided in the rear end of the duct (70) further comprises a bypass passage (91) for bypassing cold air and a fourth door (92) for opening and closing the inlet thereof. Automotive air conditioner, characterized in that. A duct for circulating air in one direction, an evaporator and an auxiliary condenser located in the duct, a compressor and a main condenser constituting the refrigerant circuit and an evaporator and an auxiliary condenser, and a refrigerant provided on the refrigerant circuit to control the circulation of the refrigerant. An air conditioner for a vehicle having a valve configured to selectively be made to the auxiliary condenser and the main condenser, wherein the duct 100 comprises: a first section 101 through which air is introduced and formed as a single passage; And a second section (102) having two first passages (102a) and a second passage (102b) that are continuous and independent of the first section (101). The duct (100) is provided with the The air introduced into the first section 101 can be distributed to the first passageway 102a of the second section 102 and, when heated, the air introduced into the first section 101 is Sectional passage selective opening and closing means for controlling the distribution path of the air is provided to be distributed in the distribution path of the second passage of the second section 102, the auxiliary condenser 52 is the air inlet side On the first section 101 and the evaporator 51 is installed on the first passageway 102a of the second section 102 where air is discharged, and on the rear side of the first passageway 102a during heating. The air conditioner for automobiles, characterized in that the bypass means 120 for bypassing some of the air passing through the evaporator (51). According to claim 3, wherein the bypass means 120 provided at the rear end of the duct 100 is further provided with a bypass passage 121 for bypassing the cold wind, and a door 122 for opening and closing its entrance Automotive air conditioning apparatus, characterized in that.