KR100807748B1 - Heat exchanger for air conditioner of two layer air flow type - Google Patents

Abstract

The present invention relates to a heat exchanger for an internal / external air flow-conditioning type air conditioner, which allows separate flow without being mixed with each other around the center of the heat exchanger when the internal air and the outside air pass through the heat exchanger in a state separated from each other. For the purpose of

In the heat exchanger 400 according to the present invention, a plurality of heat exchange tubes 410 formed by joining two plates 420 and 420 and a plurality of heat exchange fins 460 are sequentially stacked. Separation beads 428 are formed in the center of each plate in the width direction thereof, and heat exchange tubes are sequentially stacked such that separation beads of two plates adjacent to each other among heat exchange tubes are in close contact with each other. Therefore, the space between the heat exchanger tubes is separated up and down based on the separation beads. In order to stack one heat exchange fin over the spaces separated from each other, the joint end 464 is sandwiched between the separation beads corresponding to the separation beads and the corresponding inclined surfaces of the inclined surfaces 462 of the heat exchange fins. ) Is formed.

Therefore, when the inside and the outside air passes through the heat exchanger while being separated and flowed, the inside and the outside air are not mixed.

Air Conditioner, Air Conditioner, Air Conditioning, Heat Exchanger, Evaporator, 2F Flow Air Conditioning, 2F Flow Air Conditioning

Description

Heat exchanger for internal and external separation flow type air conditioner {HEAT EXCHANGER FOR AIR CONDITIONER OF TWO LAYER AIR FLOW TYPE}

1 is a cross-sectional view showing an example of a general internal and external air separation flow type air conditioner.

2 is a cross-sectional view showing an example of a general heat exchanger.

3 is a cross-sectional view showing an internal and external air separation flow type air conditioner to which a heat exchanger according to Embodiment 1 of the present invention is applied.

4 is a cross-sectional view showing a heat exchanger according to Embodiment 1 of the present invention.

5 is a front view showing a plate constituting the heat exchanger according to the first embodiment of the present invention.

6 is a sectional view showing the principal parts of a stacked state of plates constituting a heat exchanger according to Embodiment 1 of the present invention.

7 is a partial perspective view showing the heat exchange fins constituting the heat exchanger according to the first embodiment of the present invention.

8 is a front view showing a plate constituting the heat exchanger according to the second embodiment of the present invention.

9 is a front view showing a plate constituting a heat exchanger according to a third embodiment of the present invention.

   <Description of Symbols for Main Parts of Drawings>

400: heat exchanger, 410: heat exchanger tube,

420: plate, 428: separating beads,

460: heat exchange fins, 462: sloped surface,

464: junction

The present invention relates to a heat exchanger for an internal / external air flow-type air conditioner, and in particular, an internal / external air flow-type air conditioner that can form defrosting performance and heating performance in the heating mode, for example, by improving separation fluidity between internal and external air. For a heat exchanger.

An automobile air conditioner is a device for selectively introducing indoor / outdoor air of a vehicle, cooling and heating the air with a heat exchanger, and then discharging the air into the interior of the vehicle to heat and cool the interior of the vehicle. Recently, in the heating mode, hot and humid indoor air (dryer) and dry outdoor air (outer air) are separated and blown to the passenger compartment and the window, respectively, and dry outside air is used for the castle of the car window, and hot and humid bet is used for heating. The outdoor air separation flow type air conditioner has been proposed and used.

Figure 1 shows a general internal and external air separation flow type air conditioner. The air conditioning case 10 constituting the air conditioner has a first flow passage UF and a second flow passage DF partitioned up and down by the first separation wall 12. At the inlet of the air conditioning case 10, the blower 30 is arranged to blow the inside and the outside of the air conditioning case 10 alone or separately. The blower 30 has a scroll case 31 partitioned into an upper blowing chamber 33 and a lower blowing chamber 34 by a second separation wall 32. The upper blower chamber 33 communicates with the second blower chamber DF through the first passage UF of the air conditioning case 10. In addition, a first blowing fan 35 is disposed in the upper blowing chamber 33, a second blowing fan 36 is disposed in the lower blowing chamber 34, and the blowing fans 35 and 36 are motors. (Not shown) to rotate together. Therefore, when the blowing fans 35 and 36 are rotated, the air sucked into the upper blower chamber 33 is blown into the first flow path UF, and the air sucked into the lower blower chamber 34 is the second flow path DF. Can be separated from each other and blown.

An evaporator (E) is built in the inlet of the air conditioning case (10), and a heater core (H) is disposed at the rear side of the evaporator (E). And the temperature control doors 20, 22, 24 are sequentially installed in front and rear of the heater core (H) to adjust the air volume of the air selectively passing through the heater core (H). In addition, the rear of the heater core H is divided into a front flow path FF communicating with the first flow path UF, and a rear flow path RF communicating with the first flow path UF and the second flow path DF.

As shown in FIG. 2, the evaporator E is formed by stacking a plurality of heat exchange tubes T formed by bonding two plates 41 and 41 and a plurality of corrugated fins CF. The configuration of the heater core H is also substantially the same as the configuration of the evaporator E.

According to this air conditioner, the bet and the outside air blown by the blower fans 35 and 36 are blown to the first flow path UF and the second flow path DF and pass through the evaporator E. The air volume of the air selectively passing through the heater core H is controlled by the temperature control doors 20, 22, and 24 provided in the respective flow paths UF and DF. The air cooled or heated while passing through the evaporator E or the heater core H is heated and humidified according to the selection of opening and closing of the doors 14d, 16d, and 18d. The face vent 16 of the air conditioning case 10 And the vent vent 18 are discharged to the interior of the vehicle, and the dry outside air is discharged to the vehicle window through the defroster vent 14 of the air conditioning case 10 so that defrosting of the indoor heating and the vehicle window is performed.

By the way, in the case of the conventional internal and external air flow type air conditioner, although the inside of the air conditioner case 10 is separated into the first flow path UF and the second flow path DF, each heat exchanger, that is, the evaporator E and the heater In the space where the corrugated fins CF are stacked between the heat exchange tubes T among the cores H, there is no boundary for separating the inside and the outside air, as shown in FIG. 2. Therefore, while the inside and the outside air passes through the heat exchangers E and H, the inside flows through the corrugated fins CF and flows as shown by the double-dotted arrow of FIG. For this reason, especially in winter heating mode, the hot and humid bet is mixed with the outside air, and the mixed air is discharged toward the windshield through the defroster vent 14, so the defrosting efficiency of the windshield is greatly reduced by the moisture of the mixed air. In addition, since a part of the dry outside air is blown into the vehicle interior through the face vent 16 together with the hot bet, the heating performance is also lowered.

The present invention has been made to solve the problems of the above-described internal / external air flow-type air conditioner equipped with a heat exchanger, and the boundary between the inside of the heat exchanger and the outside air passing through the heat exchanger in a state in which the blown air and the air are separated from each other. The object is to allow separate flow without mixing with each other.

Two plates are joined to form a heat exchange tube, and the heat exchange tube and the heat exchange fins are alternately stacked, and the internal and external air separation flow type allows the internal and external air to flow separately between the heat exchange tubes where the heat exchange fins are installed. In the heat exchanger for an air conditioner,
Separation beads are formed in the width direction at the center of the outer surface side of the heat exchange tubes of the plates, and the heat exchange tubes are sequentially stacked so that the separation beads of two adjacent plates are closely attached to each other, thereby separating the space between the heat exchange tubes vertically. Heat exchanger for internal and external separation flow type air conditioner, characterized in that the inside and the outside air is separated and flow based on the separation beads.

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According to this, the spaces separated up and down by the separating beads between the heat exchange tubes function as a separate blower, and thus, the blower may be blown up and down by separating the inside and the outside air.

In the heat exchanger according to the present invention, in the inclined surface of the inclined surface of the heat exchange fin and the corresponding inclined surface is formed a junction end which is sandwiched and bonded between the corresponding separation beads, the space between the upper and lower spaces between the heat exchange tubes Heat exchange fins are stacked one by one over.

In the case where the heat exchanger for the internal / external air flow type air conditioner according to the present invention configured as described above is applied to the internal / external air flow type air conditioner, the first and second flow paths of the air conditioner case correspond to each other. Since a space separated up and down between the heat exchange tubes of the heat exchanger is disposed, the hot and humid bet separated by the blower and the dry bet are not mixed with each other during the flow of the air conditioning case. Therefore, in winter heating mode, only the dry bet is discharged to the windshield side, so the defrosting performance is improved, and the heating performance is improved since the hot and humid bet is blown toward the interior of the car.

The features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It must be interpreted to mean meanings and concepts.

<Example 1>

Referring to Figures 3 to 7 will be described in the heat exchanger for the internal and external air separation flow type air conditioner according to the first embodiment of the present invention.

As shown in FIG. 4, the heat exchanger 400 according to the present exemplary embodiment includes an upper first flow path UF and a lower second flow path due to the first separation wall 110 disposed in a substantially transverse direction. DF) is used as an evaporator in the inlet portion of the air conditioning case 100 partitioned by DF), for example, to cool the air blown by the blower 300 to exchange heat with the refrigerant flowing therein as shown in FIG. do.

The blower 300 installed at the inlet of the air conditioning case 100 is configured to blow the inside and the outside air alone or separately to blow into the air conditioning case 100.

The blower 300 has a scroll case 310 partitioned into an upper blowing chamber 330 and a lower blowing chamber 340 by a second separation wall 320. Although not shown in detail here, the blower 300 sucks or blows the inside or outside air to the upper air chamber 330 and the lower air chamber 340 by the air intake duct and the air guide duct not shown. Inhaled separately. The upper blowing chamber 330 communicates with the second passage DF through the first passage UF of the air conditioning case 100. In addition, a first blowing fan 350 is disposed in the upper blowing chamber 330, and a second blowing fan 360 is disposed in the lower blowing chamber 340, and the blowing fans 350 and 360 are motors (not shown). It is to rotate together by the time).

Therefore, when the blowing fans 350 and 360 rotate, the air sucked into the upper blowing chamber 330 is blown into the first passage UF, and the air sucked into the lower blowing chamber 340 into the second passage DF. Can be blown separately from each other. For example, when the outside air is sucked into the upper ventilation chamber 330 and the bet is sucked into the lower ventilation chamber 340, only the outside air is blown into the first flow path UF, and only the bet is flown into the second flow path DF. Can be blown.

An evaporator 400 as a heat exchanger according to the present embodiment is embedded in an inlet of the air conditioning case 100, and a heater core 500 is disposed at a rear of the evaporator 400 at a predetermined interval. The upper half of the evaporator 400 and the upper half of the heater core 500 lie on the first passage UF, and the lower half of the evaporator 400 and the lower half of the heater core 500 lie on the second passage DF. In addition, the first to third temperatures are provided in front of the upper half of the heater core 500 and in front of the lower half of the heater core 500 so as to control the temperature of the vehicle interior by selectively adjusting the air volume of the air passing through the heater core 500. The adjustment doors 510, 520, and 530 are sequentially installed in a rotatable manner. In addition, the rear of the heater core 500 is the front passage FF communicating with the first passage UF by the guide wall 120, and the rear passage communicating with the first passage UF and the second passage DF ( RF).

In addition, the opening degree of the first passage UF of the air conditioning case 100 is controlled by the door 140d, and is provided to the defroster vent 140 and the door 150d for discharging the rough air. The opening degree is adjusted and the face vents 150 for discharging the conditioned air to the upper half of the vehicle interior are installed one by one, and the opening degree is adjusted by the door 160d at the outlet of the second flow path DF and the conditioned air is adjusted. Foot vents 160 for discharging to the vehicle floor are sequentially installed.

In the internal / external air flow type air conditioner configured as described above, for example, when the outside air is sucked into the upper blower chamber 330 and the bet is sucked into the lower blower chamber 340 in the heating mode in winter, the outside air flows through the first flow path (UF). Blowing is carried out to the second flow path and is blown to the second flow path (DF). The dry outside air is discharged to the windshield through the evaporator 400 and the heater core 500 through the defroster vent 140 to remove the frost, and when the face vent 150 is opened, some outside air goes to the upper half of the vehicle interior. It is discharged and used for heating. In addition, the hot and humid bet is discharged toward the floor of the vehicle interior through the foot vent 160 is used for heating. Thus, defrosting of the windshield and heating of the room can be performed more effectively.

However, in the air conditioning operation of the internal / external air flow type air conditioner, if the space between the heat exchange tubes 410 constituting the heat exchanger 400 (see FIGS. 4 and 6) is not partitioned up and down, For example, since the inside and the outside air separated and blown by the blower 300 in the heating mode are mixed with each other on the heat exchange fins 460 (see FIG. 7) stacked in the space between the heat exchange tubes 410, defrosting performance and heating Performance is degraded. Therefore, the heat exchanger 400 of the present embodiment is made to improve the defrosting performance and heating performance of the windshield in the heating mode by preventing the above-described separation blown and the outside air is not mixed with each other when passing through the heat exchanger 400. have.

That is, in the heat exchanger 400 of the present embodiment, as shown in FIGS. 4 and 6, a plurality of heat exchange tubes 410 and a plurality of corrugated heat exchange fins 460 are alternately stacked. Each heat exchange tube 51 is formed by joining two plates 420 as shown in FIG. The first hole cup 421 and the second hole cup 422 are recessed side by side from the inner surface to the outer surface of the plate 420, and seal the inside of the heat exchange tube 410 when the two plates 420 and 420 are joined. The inner surface of the plate 420 by a brazing bead 423 protruding along the inner edge of the plate 420 and a partition bead 424 extending upwardly from the center of the two hole cups 421 and 422 to protrude into a structure. In the U-turn flow path 425 for communicating the two hole cups (421,422) is formed in the recess. Since the protruding height of the partition bead 424 is the same as the protruding height of the brazing bead 423, the brazing beads 423 and the partition bead 424 are joined to each other when the two plates 420 and 420 are joined, and the heat exchange tube 410 is formed. Then, two hole cups 421 and 421 and 422 and 422 form two tanks 411 and 412 of the heat exchange tube 410. Therefore, the two tanks 411 and 412 of the heat exchange tube 410 communicate with each other through the U-turn passage 425.

In addition, the inner surface of the plate 420 to form a turbulence during the flow of the heat exchange fluid and a plurality of embossed beads at the same height as the protrusion height of the brazing bead 423 or the partition bead 424 in order to uniformize the flow distribution 426 is formed in a predetermined arrangement. Thus, when the two plates 420 and 420 are bonded, the embossed beads 426 corresponding to each other are bonded to each other.

According to the present embodiment, the U turn flow path of the plate 420 in order to partition the space in which the heat exchange fins 460 between the heat exchange tubes 410 constituting the heat exchanger 400 are stacked into upper and lower spaces, respectively. A separation bead 428 in the width direction is formed at approximately the center of the 425 to be concaved from the inner surface to the outer surface of the plate 420. That is, the separating beads 428 are protruded from the outer surface side of the plate 420, and formed on two plates 420 and 420 corresponding to each other of two adjacent heat exchange tubes 410 and 410 when the heat exchange tubes 410 are stacked. As the separation beads 428 are bonded to each other, the space between the heat exchange tubes 410 may be divided into upper and lower spaces by the separation beads 428 joined to each other.

In order to stack one heat exchange fin 460 over the upper and lower spaces, the inclined surface 462 corresponding to the separation bead 428 of the inclined surfaces 462 of the heat exchange fin 460 is illustrated in FIG. 7. Bonding end 464 is formed. Therefore, when the heat exchange fins 460 are stacked, the junction end portions 464 are sandwiched and joined between the separation beads 428 corresponding to each other, so that the space between the heat exchange tubes 410 is partitioned up and down and the upper and lower partitions. Stacking of separate heat exchange fins in each space can be avoided.                     

In the present embodiment, only the heat exchanger 400 applied to the evaporator is shown and described, but the space between the heat exchange tubes 410 constituting the heat exchanger 400 as described above is separated by the upper and lower beads (428) The structure partitioned into can be applied to the heater core 500 as it is, detailed description thereof will be omitted.

Looking at the operation of the heat exchanger 400 of the present embodiment in the internal / outdoor air separation flow type air conditioner applied as an evaporator, for example, when the winter air suction mode is the internal and outdoor air separation suction mode and the air discharge mode is the heating mode, the blower fan When the fields 350 and 360 rotate, dry outside air flows into the upper blower chamber 330, and a humid bet flows into the lower blower chamber 340. The outside air flows through the upper half of the evaporator 400 to the first flow path UF, and the bet flows through the lower half of the evaporator 400 to the second flow path DF. As such, the space between the heat exchange tubes 410 constituting the evaporator 400 in the process of passing through the evaporator 400 to the outside air and the bet corresponds to the first flow path UF and the second flow path DF. Since the upper and lower portions are partitioned by 428, the outside air and the inside are prevented from being mixed through the space between the heat exchange tubes 410.

The dry outside air passing through the heater core 500 among the internal and external air flows without being mixed as described above is discharged toward the windshield through the defroster vent 140 and used for defrosting, and when the face vent 150 is opened, some outside air Is discharged to the upper half of the vehicle interior through the face vent 150 is used for indoor heating. In addition, the bet passing through the heater core 500 is discharged toward the vehicle floor through the foot vent 160 and used for indoor heating. Therefore, only the dry outside air is discharged to the windshield, so the defrosting performance is remarkably improved. In addition, since some dry outside air is discharged to the upper half of the room, not only comfortable heating is achieved but also only the bet is discharged toward the floor, thereby improving heating performance.

<Example 2>

Referring to Figure 8 will be described a heat exchanger for the internal and external air separation flow type air conditioner according to a second embodiment of the present invention. In the present embodiment, the same reference numerals as used in the first embodiment indicate the same members.

In the heat exchanger according to the present embodiment, the first hole cup 431 and the second hole cup 432 are recessed side by side at the upper end of the plate 430 from the inner surface to the outer surface thereof, and at the inner surface of the lower end of the plate 430. The third hole cup 433 and the fourth hole cup 434 are recessed side by side toward the outer surface. In addition, the inner surface of the brazing bead 435 protruding along the inner edge of the plate 430 and the inner center of the inner surface of the heat exchange tube (not shown) when the two plates 430 and 430 are bonded to each other. The left channel 437 and the right channel 438 of the plate 430 communicate with each other in the upper and lower hole cups 431, 433, 432, 434 by the partition beads 436 protruding from each other. It is partitioned on the inner surface to form a recess. The left channel 437 and the right channel 438 are not communicated by the partition bead 424. Since the protruding height of the partition bead 436 is the same as the protruding height of the brazing bead 435, when the two plates 430 and 430 are joined, the brazing beads 435 and the partition beads 436 are joined to each other to form a heat exchange tube. The heat exchange tubes have four tanks by corresponding hole cups.

In addition, the inner surface of the plate 430 to form a turbulence during the flow of the heat exchange fluid, as well as a plurality of embossing at the same height as the height of the protrusion of the brazing bead 435 or the compartment bead 436 in order to make the flow distribution uniform Beads 439 are formed in a predetermined arrangement. Therefore, when the two plates 430 and 430 are bonded, the embossed beads 439 corresponding to each other are bonded to each other.

According to the present exemplary embodiment, the left channel 437 and the right channel 438 of the plate 420 are divided into upper and lower spaces so that the spaces in which the heat exchange fins 460 between the heat exchange tubes constituting the heat exchanger are stacked are spaced up and down, respectively. Separation beads 440 in the width direction concavely from the inner surface of the plate 420 toward the outer surface are formed at approximately the center of the cross-section.

That is, as in the first embodiment, the separating bead 440 is protruded from the outer surface side of the plate 430, and formed on two plates 430 and 430 corresponding to each other of two adjacent heat exchange tubes when the heat exchange tubes are stacked. As the separation beads 440 and 440 are bonded to each other, the space between the heat exchange tubes may be partitioned into upper and lower spaces by the separation beads 440 bonded to each other. The heat exchanger of the present embodiment can be obtained by stacking one heat exchange fin 460 in the space separated up and down.

<Example 3>

Referring to Figure 9 will be described in the heat exchanger for the internal / external air separation flow type air conditioner according to a third embodiment of the present invention. In the present embodiment, the same reference numerals as used in the first embodiment indicate the same members.

The plate 450 constituting the heat exchanger of the present embodiment has a first hole cup 451 and a second hole cup 452 recessed from the inner surface of the plate 450 toward the outer surface in order at the upper and lower ends thereof. In addition, the inner surface of the plate 430 by a brazing bead 453 protruding along the inner surface edge of the plate 450 in order to seal the inside of the heat exchange tube (not shown) when the two plates (450,450) are joined. A straight flow path 454 is formed in which two hole cups 451 and 452 communicate with each other. Accordingly, the brazing beads 453 are joined to each other when the two plates 450 and 450 are joined to each other to form a heat exchange tube, and the heat exchange tubes have two tanks by corresponding hole cups.

In addition, a plurality of embossing beads 454 are formed on the inner surface of the plate 450 at the same height as the height of protrusion of the brazing beads 453 in order to form a turbulent flow when the heat exchange fluid flows and to uniformize the flow distribution. It is formed into an array. Therefore, the embossed beads 454 corresponding to each other when the two plates 450 and 450 are bonded to each other are bonded to each other.

According to the present exemplary embodiment, in order to partition the spaces in which the heat exchange fins 460 between the heat exchange tubes constituting the heat exchanger are stacked into upper and lower spaces, the plate is approximately centered on the straight passage 454 of the plate 450. Separation beads 455 in the width direction concaved from the inner surface of the 450 to the outer surface are formed.

That is, as in the first embodiment, the separation beads 455 are protruded from the outer surface side of the plate 450, and are formed on two plates 450 and 450 corresponding to each other of two adjacent heat exchange tubes when the heat exchange tubes are stacked. As the separation beads 455 are bonded to each other, the space between the heat exchange tubes may be divided into upper and lower spaces by the separation beads 455 joined to each other. The heat exchanger of the present embodiment can be obtained by stacking the heat exchange fins 460 in the space separated up and down.

As described in detail above, in the heat exchanger for the internal / external air flow type air conditioner according to the present invention, only dry outside air is discharged toward the windshield by preventing dry air and hot and humid internal air from being mixed with each other when passing through the heat exchanger. Removal performance is improved. Therefore, safe driving of the vehicle can be achieved.

In addition, some dry outside air is discharged to the upper half of the vehicle interior, and only the hot and humid internal air is discharged toward the vehicle floor, so that not only can the heating of the vehicle interior be comfortable, but also the heating performance is improved.

Claims (2)

Two plates are joined to form a heat exchange tube, and the heat exchange tube and the heat exchange fins are alternately stacked, and the internal and external air separation flow type allows the internal and external air to flow separately between the heat exchange tubes where the heat exchange fins are installed. In the heat exchanger for an air conditioner, Separation beads are formed in the width direction at the center of the outer surface side of the heat exchange tubes of the plates, and the heat exchange tubes are sequentially stacked so that the separation beads of two adjacent plates are closely attached to each other, thereby separating the space between the heat exchange tubes vertically. Heat exchanger for internal and external separation flow type air conditioner, characterized in that the inside and the outside air is separated and flow based on the separation beads. The method of claim 1, In the inclined surfaces of the heat exchange fins, the separation beads and the corresponding inclined surfaces are formed to be joined to each other by being interposed between the separation beads corresponding to each other, so that the heat exchange fins are stacked one by one over the upper and lower spaces between the heat exchange tubes. Heat exchanger for internal and external separation flow type air conditioner, characterized in that.

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