KR20030016820A - Air conditioner for vehicles two-layer air flow type - Google Patents

Abstract

PURPOSE: A two-layer air flow type air conditioner for vehicles is provided to prevent dropping of efficiency of a blower. CONSTITUTION: A floor door(100) comprises a short axis door part(110) rotating with a hinge part(101) as a center to open and close an upper half part of a floor vent(15); and a long axis door part(120) opening and closing a lower half part of the floor vent and a rear channel(53). The floor door rotates to be at a first position(D1) closing the floor vent, a second position(D2) opening the floor vent to be fluidically connected with a lower channel(52) and a third position(D3) opening the floor vent to be fluidically connected with the lower channel as well as the rear channel.

Description

Air Conditioning Device for 2F Air Flow Type Automotive Air Conditioning Unit {AIR CONDITIONER FOR VEHICLES TWO-LAYER AIR FLOW TYPE}

The present invention relates to an air conditioner, and more particularly, to an automotive air conditioner having a two-layer air flow structure capable of separating and inhaling internal and external air.

The air conditioner for two-layer air-flow type automobiles has been developed for the purpose of maintaining high heating performance while ensuring defogging performance during heating. In other words, when removing the frost on the window during the heating run in winter, low-humid cold air is effective, so it is introduced to remove the frost, which results in a decrease in room temperature. In the above case, the two-layer air flow type air conditioner uses fresh and low humidity air supplied to the upper part by realizing two-layer air flow between the upper part of the vehicle and the lower part to circulate the inner part. It effectively removes the frost, while providing fresh outside air to the passengers, and supplies a warm bet to maintain a high heating performance.

An example of such a two-layer air flow type automotive air conditioner is illustrated in FIG. 1, which will be briefly described as follows.

As shown, a two-layer air flow type automotive air conditioner is provided with a blower 20 for forcibly blowing air at the inlet side of the air conditioner case 10, and the evaporator 30 behind the blower 20. ) And the heater core 40 are respectively disposed, and the separation wall 50 to prevent the internal and external air from flowing through the inlet of the air conditioning case 10 between the evaporator 30 and the heater core 40. ) Is formed. In addition, the first and second temperature control doors (60, 60a) are installed in the front of the heater core 40 to be interlocked, and the third temperature control door (60b) is installed in the rear of the heater core (40). do.

The inlet of the air conditioning case 10 is divided by the partition 10a and is divided into internal and external air inlets 11 and 12. In addition, a defrost vent 13 and a face vent 14 are formed at an upper portion of the air conditioning case 10, and a floor vent 15 is formed at a lower portion thereof. Each of these vents 13, 14, 15 is opened and closed by the doors 13a, 14a, 15a.

The blower 20 is divided into first and second fans 21 and 22, and the first fan 21 is installed at the air inlet 11 of the air conditioning case 10. The lower fan 10 is circulated, and the second fan 22 is installed at the outside air inlet 12 of the air conditioner case 10 to circulate the outside air to the top of the air conditioner case 10.

Since the evaporator 30 and the heater core 40 are ordinary heat exchangers for heat-exchanging air, detailed description thereof will be omitted.

The separating wall 50 has a distal end extending from the rear approximately center of the evaporator 30 to the rear via the center of the heater core 40, and the extended end 50a of the dividing wall 50 faces the face vent 14. It is disposed so as to direct air passing through the heater core 40 to be discharged to the defrost vent 13 or the face vent (14). The interior of the air conditioner case 10 is divided into an upper flow passage 51, a lower flow passage 52, and a rear flow passage 53 behind the extension end 50 a by the separation wall 50.

The first and second temperature control doors (60, 60a) are assembled to be interlocked with each other by the interlocking means in the upper and lower portions of the separation wall 50, the front of the heater core 40 and the heater core 40 The upper and lower flow paths (51, 52) formed in the upper and lower portions of the selectively acts to open and close. In addition, the third temperature control door 60b is rotatably installed at the rear of the heater core 40 so that air flowing in the lower flow path 52 below the heater core 40 in the cooling mode is heated by the heater core 40. It serves to close the rear of the heater core 40 so as not to heat exchange with.

The general two-layer air flow type automotive air conditioner configured as described above operates in such a manner as to operate the first and second temperature control doors 60 and 60a to block the front of the heater core 40 in the cooling mode. The control door 60b operates to block the rear of the heater core 40 so that the inside and outside heat exchanged in the evaporator 30 are separated on both sides by the separating wall 50 and formed outside the upper and lower parts of the heater core 40. The upper and lower flow passages 51 and 52 are supplied to the interior of the vehicle through a designated vent to cool the interior of the vehicle. At this time, the bet introduced by the first fan 21 of the blower 20 passes through the lower passage 52, and the outside air introduced by the second fan 22 passes through the upper passage 51. .

In the heating mode, the first and second temperature control doors 60 and 60a operate to open the front of the heater core 40 and the third temperature control door 60b is heated to the heater core 40. By operating to open the rear of the internal and external air discharged from the evaporator 30 passes through the heater core 40 is supplied to the interior of the vehicle interior through the designated vent to heat the interior. At this time, the bet introduced by the first fan 21 of the blower 20 passes through the lower half of the heater core 40 at the boundary of the separation wall 50, and the outside air introduced by the second fan 22. Passes through the upper half of the heater core 40.

On the other hand, the two-layer air-flow type car air conditioner is operated in a variety of modes in addition to the above-described modes, such as air-conditioning floor mode and air-conditioning mix mode.

In the cooling and heating floor mode, the air is discharged to the defrost vent 13 and the floor vent 15. In the cooling floor mode, the first, second and third temperature control doors 60, 60a and 60b are heaters. The core 40 is operated to close and close (open in the heating floor mode), the floor door 15a is operated to open the floor vent 15, and the defrost door 13a is also a defrost vent 13 ) To approximately half or less open. Therefore, the inside and the outside air passing through the evaporator 30 is separated by the separating wall 50 through the floor vent 15 via the lower flow path 52 (the lower half of the heater core in the heating floor mode). The outside air is supplied to the room and the outside air is supplied into the vehicle interior through the defrost vent 13 via the upper flow path 51 (upper half of the heater core in the heating floor mode). At this time, approximately 70 to 80% of air is discharged to the floor vent 15 and approximately 20 to 30% of air is discharged to the defrost vent 13.

The air-conditioning mix mode has all the same conditions as the above floor mode, except that the defrost door 13a operates to open the defrost vent 13 by approximately half or more. At this time, the air discharge amount ratio of the defrost vent 13 to the floor vent 15 is set to about 50:50.

Here, the air vent amount ratio of the floor vent 15 to the defrost vent 13 is set at a ratio that can obtain an optimal comfort in ergonomics. In particular, in the floor mode, the above-described floor vent 15 vs. D The air discharge amount ratio of the frost vent 13 is most preferably about 70 to 80:20 to 30.

However, in a general two-layer air flow type automotive air conditioner, since air is blown to each of the flow paths 51 and 52 through the blower 20 in the floor mode at the same ratio, for example, 50:50, The amount of air that can be discharged through the fully open floor vent 15 is only about 50%. That is, the amount of air blown out through the floor vent 15 in the floor mode is inevitably lower than the above-described optimum conditions. Furthermore, since 50% of the air blown into the upper flow path 51 is discharged through the actual defrost vent 13, the amount of air discharged through the upper flow path 51 is about 20-30%. As a result, the air pressure on the upper flow path 51 is increased, so that the load on the second fan 22 of the blower 20 is not only large, but also a large amount of air leakage is generated, thereby reducing the overall efficiency of the blower 20. This results in a decrease in air volume. Such a decrease in the amount of air eventually leads to a decrease in the heating and cooling efficiency, so improvement is required.

The present invention has been made in view of the above, and in the floor mode, the air discharge amount ratio of the floor vent to the defrost vent is reduced by inducing and discharging excess air on the upper flow path remaining without being discharged to the defrost vent to the floor vent. By controlling air optimally and lowering the air pressure in the upper flow path so that the blower is not loaded, the overall efficiency of the blower can be prevented from being reduced. As a result, the blowing efficiency of the blower can be improved, and thus the heating and cooling performance can be improved. It is an object of the present invention to provide an air conditioner for a floor air flow type vehicle.

1 is a cross-sectional view schematically showing the structure of a general two-layer airflow type automotive air conditioner;

Figure 2 is a cross-sectional view schematically showing the structure of a two-layer airflow vehicle air conditioner according to an embodiment of the present invention,

Figure 3 is a detailed view showing the operation state of the air conditioner for a two-layer airflow type automobile according to an embodiment of the present invention,

4 is a detailed view of the main part showing another operating state of the air conditioner for a two-layer airflow type automobile according to an embodiment of the present invention;

Figure 5 is a detailed view showing the main structure and operation state of the air conditioner for a two-layer airflow vehicle according to another embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

10; air conditioning cases 11 and 12; inside and outside air inlet

13,14,15; vent 20; blower

30; Evaporator 40; Heater core

50; separating wall 50a; extending end of the separating wall

60, 60a, 60b; Temperature control door 100; Floor door

101; hinge portion 110; shortening door portion

120; long shaft door parts 111 and 121; first and second guide parts

In order to achieve the above object, a two-layer airflow type automotive air conditioner according to the present invention includes an internal and external air inlet at a front end thereof, and a defrost vent and a face vent that are opened and closed by a defrost door and a face door at an upper end thereof. An air conditioning case having a floor vent formed at a lower portion thereof, the floor vent being opened and closed by a floor door; A blower divided into an inner side first fan and an outer side second fan installed at the inner and outer air inlets of the air conditioning case; An evaporator disposed at the rear of the blower; A heater core disposed behind the evaporator; It is installed extending from the center of the rear of the evaporator via the center of the heater core, the extension end is bent toward the defrost vent of the air conditioning case, the interior of the air conditioning case to the upper flow path, the lower flow path and the rear end of the extension end A partition wall partitioning into a rear channel of the filter; First and second temperature control doors rotatably installed at upper and lower positions of the separation wall in front of the heater core to open and close the front of the heater core; And a third temperature control door rotatably installed at the rear of the heater core to selectively block the rear of the heater core, wherein the floor door pivots around the hinge to open and close the upper half of the floor vent. And a long axis door part for opening and closing the bottom half of the floor vent and the rear flow passage, the first position for closing the floor vent, the second position for opening the floor vent to communicate with the lower flow passage, and the floor vent to communicate with the lower flow passage. And turning to a third position which is open to communicate with the rear flow passage at the same time.

According to this, in the floor mode, the floor door swings to the third position and opens the floor vent to communicate with the lower flow passage and also communicates with the rear flow passage, so that not only the bet flowing through the lower flow passage but also the upper flow passage flows. Part of the outside air may be discharged to the floor vent through the rear channel.

Therefore, in the floor mode, the air discharge ratio of the floor vent to the disproven vent can be controlled to an optimum condition of 80:20, and since a part of the outside air flowing through the upper flow path is discharged to the floor vent, the air pressure in the upper flow path is lowered. Since the blower is not loaded, the overall blowing efficiency of the blower can be improved.

According to a preferred embodiment of the present invention, arc-shaped first and second arcs having the same radius of curvature as the turning trajectory of the floor door are provided at the upper end of the floor vent and the extended end of the separation wall that interfere with both ends thereof for smooth swinging of the floor door. Guides are formed respectively.

In addition, the floor door may be formed in a straight line shape in which the short axis door part and the long axis door part lie on the same line, and the short door part and the long axis door part may be formed in a wavy structure bent in opposite directions to each other.

The floor door preferably has a length ratio of the short axis door part and the long axis door part in a range of 2: 8 to 3: 7.

Best Mode for Carrying Out the Invention Preferred embodiments of the present invention will now be described based on the accompanying drawings.

2 is a cross-sectional view schematically showing the structure of a two-layer air-flow type automotive air conditioner according to an embodiment of the present invention, Figure 3 is an operating state of a two-layer airflow type automotive air conditioner according to an embodiment of the present invention 4 is a detailed view showing the main operation of the two-layer air flow type vehicle air conditioner according to an embodiment of the present invention. For reference, in describing the present embodiment, the same reference numerals refer to the same parts as those in the related art.

As shown in FIG. 2, in the air conditioner for a two-layer air flow type automobile according to an embodiment of the present invention, a blower 20 for forcibly blowing air is installed at an inlet side of the air conditioning case 10. An evaporator 30 and a heater core 40 are respectively disposed at the rear of the blower 20, and between the evaporator 30 and the heater core 40 flows through an inlet of the air conditioning case 10. The separation wall 50 is formed so that outside air is not mixed. In addition, the first and second temperature control doors (60, 60a) are installed in the front of the heater core 40 to be interlocked, and the third temperature control door (60b) is installed in the rear of the heater core (40). do.

The inlet of the air conditioning case 10 is divided by the partition 10a and is divided into internal and external air inlets 11 and 12. In addition, a defrost vent 13 and a face vent 14 are formed at an upper portion of the air conditioning case 10, and a floor vent 15 is formed at a lower portion thereof. Each of these vents 13, 14, 15 is opened and closed by the door, that is, the defrost door 13a, the face door 14a, and the floor door 100.

The blower 20 is divided into first and second fans 21 and 22, and the first fan 21 is installed at the air inlet 11 of the air conditioning case 10. 10, the second fan 22 is installed at the outside air inlet 12 of the air conditioning case 10 to circulate the outside air to the top of the air conditioning case 10.

Since the evaporator 30 and the heater core 40 are ordinary heat exchangers for heat-exchanging air, detailed description thereof will be omitted.

The separating wall 50 has a distal end extending from the rear approximately center of the evaporator 30 to the rear via the center of the heater core 40, and the extended end 50a of the dividing wall 50 faces the face vent 14. It is disposed so as to direct air passing through the heater core 40 to be discharged to the defrost vent 13 or the face vent (14). The interior of the air conditioner case 10 is divided into an upper flow passage 51, a lower flow passage 52, and a rear flow passage 53 by the separation wall 50.

The first and second temperature control doors (60, 60a) are assembled to be interlocked with each other by the interlocking means in the upper and lower portions of the separation wall 50, the front of the heater core 40 and the heater core 40 The upper and lower flow paths (51, 52) formed in the upper and lower portions of the selectively acts to open and close. In addition, the third temperature control door 60b is rotatably installed at the rear of the heater core 40 so that air flowing in the lower flow path 52 below the heater core 40 in the cooling mode is heated by the heater core 40. It serves to close the rear of the heater core 40 so as not to heat exchange with.

The basic configuration of the air conditioner as described above is not significantly different from the conventional case described above. However, the present invention is different from the conventional in the configuration and operation of the floor door 100 for opening and closing the floor vent 15, by which the object of the present invention can be achieved, it will be described in detail.

According to a feature of the present invention, the floor door 100 as shown in Figures 3 and 4, pivoting around the hinge portion 101, the shortening door portion 110 for opening and closing the upper half of the floor vent (15) ) And the long shaft door part 120 that opens and closes the lower half and the rear passage 53 of the floor vent 15. The hinge portion 101 is present at an arbitrary position on an imaginary line connecting upper and lower ends of the inlet portion of the floor vent 15.

The floor door 100 configured as described above opens and closes the floor vent 15 while pivoting around the hinge portion 101 according to the mode switching. In this case, the floor mode 100 closes the floor vent 15. It turns to not only the 2nd position D2 which opens the 1st position D1 and the floor vent 15 but also the 3rd position D3. Here, the first position D1 is a position where the floor door 100 completely closes the floor vent 15 in the full defrost mode or the full face mode so that air is not discharged through the floor vent 15. The second position D2 is a position in which the floor door 100 opens the floor vent 15 to communicate with the lower flow passage 52 in the air-conditioning mix mode so that the bet is discharged through the floor vent 15. The third position D3 opens the lower flow passage 52 by opening the floor door 100 so that the floor vent 15 communicates with the lower flow passage 52 and also communicates with the rear flow passage 53 in the air-conditioning floor mode. A portion of the flowing bet and the outside air flowing in the upper flow path 51 is discharged through the floor vent 15. In this way, since the floor door 100 is turned to the third position D3 in the floor mode, not only the lower passage 52 but also a part of the outside air of the upper passage 51 are discharged together to the floor vent 15. The blowing amount discharged to the floor vent 15 is increased, and the air pressure on the upper flow passage 51 is lowered so that the blower 20 is not loaded.

According to a preferred embodiment of the present invention, the floor door 100 is disposed at an upper end of the floor vent 15 and an extended end 50a of the separation wall 50 that interfere with both ends thereof for smooth swinging of the floor door 100. Circular arc-shaped first and second guide parts 111 and 121 having the same radius of curvature as are respectively formed.

In addition, it is preferable that the floor door 100 has a length ratio of the shortened door part 110 and the long axis door part 120 in a range of 2: 8 to 3: 7.

The floor door 100 is formed in a straight line shape in which the shortened door part 110 and the long axis door part 120 lie on the same line. However, the floor door 100 is not limited thereto, and the floor door 100 is illustrated in FIG. 5. As shown, the short axis door part 110 and the long axis door part 120 may be formed in a wavy structure bent in opposite directions to each other.

Hereinafter, the operation of the two-layer air flow type vehicle air conditioner according to the present invention configured as described above will be described.

In the basic cooling and heating mode, the air forced by the blower 20 through the internal and external air inlets is separated by the separating wall 50 and blown by the lower passage 52 and / or the lower half of the heater core 40 and the outside air. Is discharged to the designated vent while flowing through the upper passage 51 and / or the upper half of the heater core 40 is the same as the conventional case described above. In addition, since the operating conditions of the doors other than the floor door 100 in the air-conditioning floor mode and the mix mode are also not different from those of the conventional case described above, the description thereof will be omitted and only the operation of the floor door 100 will be described. .

According to an aspect of the present invention, the floor door 100 pivots to the first position D1 for closing the floor vent 15 in the full defrost mode and the full face mode, and in the mixed mode, as shown in FIG. By turning to the second position D2, the floor vent 15 is opened so that the lower flow passage 52 and the floor vent 15 communicate with each other.

Meanwhile, in the floor mode, the floor door 100 has a third position D3, that is, the lower flow passage 52 and the floor vent 15 communicate with each other and the rear flow passage 53 and the floor vent 15 as shown in FIG. 4. The floor vent 15 is opened to communicate with each other.

Thereby, not only the entire amount of bet flowing in the lower flow passage 52 in the floor mode is discharged to the floor vent 15, but also the surplus remaining after being discharged through the defrost vent 13 in the outside air flowing in the upper flow passage 51. Air is discharged to the floor vent 15 through the rear flow passage 53. That is, in the floor mode, the discharge amount of air through the floor vent 15 can be greatly increased as compared with the related art. In other words, in the prior art, the rear passage 53 is blocked by the floor door in the floor mode, so that the maximum amount of air discharged through the floor vent 15 is only about 50%. Since some air flowing through the upper flow passage 51 is added, air of about 70 to 80% can be discharged through the floor vent 15. In addition, since the surplus air remaining without being discharged through the defrost vent 13 from the upper flow passage 51 is discharged to the floor vent 15 via the rear flow passage 53, the upper flow passage 51 Since the air pressure is lowered, it is possible to prevent the blower from being loaded due to the high air pressure in the upper flow path.

According to the present invention as described above, a part of the outside air flowing in the upper flow passage in the air-conditioning floor mode, that is, surplus air remaining without being discharged to the defrost vent is discharged to the floor vent via the rear flow passage, Since the furnace is discharged by adding a part of the outside air of the upper passage to the bet flowing in the lower passage, the air discharge amount of the floor vent can be increased. Therefore, since the air discharge amount ratio of the floor vent to the defrost vent in the floor mode is adjusted at an optimum condition, for example, a ratio of 80:20, the passenger comfort can be improved.

Further, according to the present invention, since the air remaining in the upper flow passage without being discharged to the defrost vent is discharged through the floor vent as described above, the air pressure in the upper flow passage is lowered, and thus, the upper flow passage as in the prior art. Since the high pressure of the blower does not apply a load, the overall efficiency of the blower can be prevented from being reduced. That is, the air volume increases due to the high blowing efficiency of the blower, it is possible to improve the cooling and heating performance.

While the invention has been described and illustrated with reference to preferred embodiments for illustrating the principles of the invention, the invention is not limited to the configuration and operation as such is shown and described. Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

Claims (5)

An air conditioning case in which an inner and outer air inlet is formed at a front end, a defrost vent and a face vent are opened and closed by a defrost door and a face door, and a floor vent is opened and closed by a floor door; A blower divided into an inner side first fan and an outer side second fan installed at the inner and outer air inlets of the air conditioning case; An evaporator disposed at the rear of the blower; A heater core disposed at the rear of the evaporator; It is installed extending from the center of the rear of the evaporator via the center of the heater core, the extension end is bent toward the face vent of the air conditioning case, the interior of the air conditioning case, the upper passage, the lower passage and the extension end A partition wall partitioning into a rear rear channel; First and second temperature control doors rotatably installed at upper and lower positions of the separation wall in front of the heater core to open and close the heater core; And a third temperature regulating door rotatably installed at the rear of the heater core to selectively block the rear of the heater core. The floor door, It consists of a shortened door part for turning the hinge part to open and close the upper half of the floor vent, and a long axis door part for opening and closing the bottom half of the floor vent and the rear flow path, which is the first position and floor for closing the floor vent depending on the mode. A two-stage airflow type vehicle characterized in that the vent is opened in a second position for communicating with the lower flow passage and the floor vent is in communication with the lower flow passage and in a third position for opening communication with the rear flow passage. Air Conditioning Unit The method of claim 1, The first and second guide parts having the same radius of curvature as the turning trajectory of the floor door are respectively formed at the upper end of the floor vent and the extension end of the separation wall so as to smoothly swing the floor door. Air conditioner for two-floor air-flow type automobile. The method according to claim 1 or 2, The length ratio of the shortened door part and the long shaft door part of the floor door is in the range of 2: 8 to 3: 7. The method of claim 3, wherein The floor door is a two-layer air flow type automotive air conditioner, characterized in that formed in a straight line form the short axis door portion and the long axis door portion on the same line. The method of claim 3, wherein The floor door is a two-layer air flow type automotive air conditioner, characterized in that the short-shape door portion and the long-shape door portion is formed in a corrugated structure bent in the opposite direction.