JP2006306292A - Air conditioning unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioning unit capable of suppressing the air from being heated at the time of maximum cooling. <P>SOLUTION: A heater core 15 is movably constituted between a non heating position where the air does not pass through the heater core 15, and a heating position where the air passes through the heater core 15, and the blowout temperature of the air is adjusted by adjusting the moving amount. A guide plate 22 which guides the air flowing on the surface 21 of the heater core 15 when being disposed at the non-heating position so as to circulate to the direction separating from the heater core 15 is provided on the surface 21 of the heater core 15. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an air conditioning unit.

Conventionally, as disclosed in Patent Document 1, an air mix type air conditioning unit has been proposed that adjusts the air blowing temperature by rotating or sliding a heater core without using an air mix door. . In the air conditioning unit having such a configuration, the heater core is arranged at all heating positions where all the air passing through the air passage passes through the heater core at the time of max hot that exhibits the maximum heating capacity by the movement of the heater core. On the other hand, the heater core is arranged at a non-heated position where air does not pass through the heater core at the time of max cool that exhibits the maximum cooling capacity. As a result, the air blowing temperature can be adjusted by adjusting the amount of movement of the heater core without using an air mix door.
Japanese Patent Laid-Open No. 2001-246721

  However, in the configuration as described above, air flows in the same air passage at the time of max cool and at the time of max hot. Therefore, the surface of the heater core is exposed to the air passage when the heater core is disposed at the non-heated position at the max cool. To do. As a result, there is a problem that the air (cold air) flowing on the surface of the heater core is heated on the exposed surface of the heater core, and the temperature of the air flowing in the air passage rises.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide an air conditioning unit capable of suppressing air from being heated during the max cool.

  In order to solve the above problems, the invention described in claim 1 includes a case for forming an air passage, and a heat exchanger for heating that is provided in the case and heats air passing therethrough. The heat exchanger is configured to be movable between a non-heating position where air does not pass through the heating heat exchanger and a heating position where air passes through the heating heat exchanger, and the movement amount is adjusted. In the air conditioning unit that adjusts the air blowing temperature in the air, the air that flows through the surface of the heating heat exchanger when arranged at the non-heating position on the surface of the heating heat exchanger The gist of the invention is that a guide member is provided to guide the flow in a direction away from the head.

  According to the first aspect of the present invention, when the heat exchanger for heating is disposed at the non-heating position, it is a max cool time that exhibits the maximum cooling capacity. At this position, even if the air is about to flow on the surface of the heating heat exchanger, the air is caused to flow away from the heating heat exchanger by the guide member provided on the surface of the heating heat exchanger. Guided by For this reason, it can suppress that air is heated at the time of a max school.

  According to a second aspect of the present invention, in the first aspect, the heat exchanger for heating is configured to be movable between the non-heating position and the heating position by rotating about a rotating shaft. The air blowing temperature is adjusted by adjusting the rotation angle, and the guide member is disposed so as to be exposed to the air passage even in the non-heating position, and the guide member is exposed to the air passage in the non-heating position. The main point is that the heat exchanger is provided on the surface of the heat exchanger.

  According to the second aspect of the present invention, it is possible to prevent the air from being appropriately heated during the max cool in the air conditioning unit including the heating heat exchanger that rotates and moves.

  According to a third aspect of the present invention, in the first aspect, the case includes a storage portion that stores the heating heat exchanger outside the air passage, and the heating heat exchanger is in the non-heating position. Then, it is stored in the storage part, and is configured to be movable between the non-heating position and the heating position by sliding between the storage part and the air passage, and by adjusting the sliding position. An air blowing temperature is adjusted so as to be exposed to the air passage even in the non-heating position, and the guide member is disposed on the surface of the heating heat exchanger exposed to the air passage in the non-heating position. The summary is provided.

  According to this invention of Claim 3, it can suppress that air is appropriately heated at the time of a max cool in an air-conditioning unit provided with the heat exchanger for a heating which slides.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the guide member is formed so that an angle with the surface of the heat exchanger for heating is an acute angle. Is the gist.

  According to the fourth aspect of the present invention, the guide member is formed so that the angle with the surface of the heating heat exchanger is an acute angle. Compared with the case where the angle is formed to be a right angle, the air after being guided by the guide member is less likely to enter the surface of the heating heat exchanger.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the guide member is provided in plural on the surface of the heating heat exchanger along the flow of the air. Is the gist.

  According to the fifth aspect of the present invention, by providing a plurality of guide members, air is guided in a direction in which the air is separated at a plurality of locations as compared with the case where a single member is provided. Can be suppressed.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a cross-sectional view showing a schematic configuration of an air conditioning unit (hereinafter simply referred to as “air conditioning unit”) 11.

  The case 12 that forms the outline of the air conditioning unit 11 forms an air passage 13. The air passage 13 is bent about 90 degrees in the middle thereof to form a bent portion 13a. In the air passage 13, air flows from the windward side to the leeward side by a blower (not shown).

  In the case 12, an evaporator 14 as a heat exchanger for cooling is provided on the windward side of the bent portion 13 a of the air passage 13. The evaporator 14 has a rectangular thin shape, and all the air blown from a windward blower (not shown) passes through the evaporator 14. A refrigerant from a refrigeration cycle (not shown) circulates in the evaporator 14, and heat exchange between the refrigerant in the evaporator 14 and the air passing through the evaporator 14 cools the air passing through the evaporator 14.

  A heater core 15 as a heat exchanger for heating is provided in the case 12 on the leeward side of the evaporator 14. The heater core 15 is provided on the leeward side of the bent portion 13a in the air passage 13, and is disposed at a position bent about 90 degrees from the evaporator 14 described above. The heater core 15 includes a rectangular thin core portion 16 and a pair of first and second tank portions 17 and 18 provided on both sides of the core portion 16. A rotating shaft 20 is provided coaxially with the second tank portion 18 in the heater core 15.

  Cooling water from a vehicle engine (not shown) circulates in the heater core 15. That is, the cooling water flows from a fixed side pipe (not shown) that supports the rotating shaft 20 and flows into the first tank part 17 via a bypass pipe (not shown) in the core part 16. And it distribute | distributes to the some tube (not shown) which comprises the core part 16 from this 1st tank part 17, and distribute | circulates the said core part 16. FIG. After that, it is collected in the second tank portion 18 and flows out from a rotation side pipe (not shown) constituting the rotation shaft 20. Since the cooling water flowing into the heater core 15 is warm water after cooling the engine, heat is exchanged between the warm water (cooling water) and the air passing through the core portion 16 of the heater core 15 so that the heater core 15 is cooled. Heat the passing air. An air outlet 19 is provided on the leeward side of the heater core 15 in the air passage 13. Air that has passed through the air passage 13 is sent out from the air outlet 19.

  The rotating shaft 20 is disposed close to the inner surface of the case 12. The heater core 15 rotates around the rotating shaft 20 as a fulcrum, so that all air flowing through the air passage 13 passes through the core portion 16 of the heater core 15 and the non-heated position where the air does not pass through the core portion 16 of the heater core 15. It is possible to move between all heating positions (see FIG. 2).

  As shown in FIG. 1, in the non-heating position, the core portion 16 of the heater core 15 is disposed so as to contact the inner surface of the case 12 adjacent to the rotating shaft 20, and the total amount of air that has passed through the evaporator 14 is It flows to the leeward air outlet 19 without passing through the core 16. As a result, when the heater core 15 is disposed at the non-heated position, it is a max cool time in which the maximum cooling capacity can be exhibited. In this state, the core portion 16 and both tank portions 17 and 18 of the heater core 15 are exposed to the air passage 13.

  On the other hand, as shown in FIG. 2, the first tank portion 17 of the heater core 15 is disposed so as to be in contact with the inner surface of the case 12 separated from the rotary shaft 20 at the full heating position. Then, the entire amount of air that has passed through the evaporator 14 passes through the core portion 16 of the heater core 15, is heated by the core portion 16, and flows to the leeward air outlet 19. As a result, in the state where the heater core 15 is disposed at all the heating positions, the maximum hot time during which the maximum heating capacity can be exhibited is reached. Even in this state, the heater core 15 is exposed to the air passage 13. Further, the first tank portion 17 of the heater core 15 may be configured not to contact the inner surface of the case 12 at the full heating position.

  If the heater core 15 is stopped at an intermediate position between the full heating position and the non-heating position, the warm air passing through the core portion 16 of the heater core 15 and the first tank portion 17 and the case 12 bypassing the heater core 15 are bypassed. The cold air that has passed between the inner surfaces of the heater core 15 is mixed on the leeward side of the heater core 15 and flows to the outlet 19. As a result, by adjusting the rotation angle (movement amount) of the heater core 15, it is possible to adjust the temperature of the air flowing through the outlet 19. The heater core 15 rotates when a motor (not shown) is driven.

  A flat guide plate 22 protrudes from the surface 21 of the heater core 15 exposed to the air passage 13 at the non-heating position as shown in FIG. 1, and the guide plate 22 allows air flowing through the surface 21 of the heater core 15 to flow. The flow is guided in a direction away from the heater core 15. The guide plate 22 corresponds to a guide member. The guide plate 22 will be described in detail. The surface 23 of the core portion 16 exposed to the air passage 13 at the non-heating position and the first tank portion located on the leeward side at the non-heating position among the tank portions 17 and 18. A plurality of guide plates 22 are arranged on a straight line at predetermined intervals along the air flow (indicated by an arrow N in FIG. 1) on the surface 24 of 17. As shown in FIG. 1, the surface 24 of the first tank portion 17 exposed to the air passage 13 has a surface 24 a along the surface 23 of the core portion 16 and a surface 24 b orthogonal to the surface 23 of the core portion 16. However, in this embodiment, the guide plate 22 is provided only on the surface 24 a along the surface 23 of the core portion 16. In the present embodiment, two guide plates 22 are provided on the surface 23 of the core portion 16 and one guide plate 22 is provided on the surface 24 a of the core portion 16.

  Moreover, the guide plate 22 is provided on the surfaces 23 and 24 of the core portion 16 and the first tank portion 17 so that the angle θ with the surface 21 of the heater core 15 is an acute angle. In other words, the guide plate 22 is inclined with respect to the surfaces 23 and 24 of the core portion 16 and the first tank portion 17 so that the distal end portion thereof is located on the leeward side with respect to the proximal end portion in the non-heating position. Is provided. Here, the rotating shaft 20 of the heater core 15 is provided in the second tank portion 18 located on the leeward side in the non-heating position among the tank portions 17 and 18 of the heater core 15. For this reason, the guide plate 22 provided on the surfaces 23 and 24 exposed to the air passage 13 at the non-heating position is positioned on the leeward side of the heater core 15 at the entire heating position.

  Next, the operation of the air conditioning unit 11 configured as described above will be described.

  When the user desires the maximum heating capacity, the heater core 15 is disposed at all heating positions as shown in FIG. In this state, all the air (cold air) passing through the evaporator 14 and flowing through the air passage 13 passes through the core portion 16 of the heater core 15. The air (hot air) that has passed through the heater core 15 and exchanged heat is sent out from the air outlet 19. In this full heating position, the guide plate 22 is located on the leeward side of the heater core 15, and the air immediately after passing through the core portion 16 of the heater core 15 flows along the guide plate 22 to the leeward side.

  On the other hand, when the user desires the maximum cooling capacity, the heater core 15 is disposed at the non-heating position as shown in FIG. In this state, all the air (cold air) passing through the evaporator 14 and flowing through the air passage 13 is sent out from the outlet 19 without passing through the core portion 16 of the heater core 15. At this time, the core portion 16 and both tank portions 17 and 18 of the heater core 15 are exposed to the air passage 13. For this reason, after passing through the evaporator 14, the air bent 90 degrees and passing through the air passage 13 tends to flow on the surface 21 of the heater core 15 exposed in the air passage 13. However, the guide plate 22 is provided on the core portion 16 exposed to the air passage 13 and the surfaces 23 and 24 of the first tank portion 17, and the guide plate 22 guides the air to flow away from the heater core 15. Is done. For this reason, it can suppress that air is heated at the time of a max school.

  In addition, when the heater core 15 configured to rotate as described above is used, air flows through the same air passage 13 at the time of max cool and max hot, unlike the case of using an air mix door as in the prior art. As a result, the heater core 15 is necessarily disposed so as to be exposed to the air passage 13 in the non-heating position. For this reason, in the air conditioning unit 11 including the heater core 15 that rotates and moves, the guide plate 22 is provided on the surface 21 of the heater core 15 that is exposed to the air passage 13 at the non-heating position to appropriately exhibit the maximum cooling capacity at the time of max school. can do.

  In the guide plate 22, the guide plate 22 is formed so that the angle θ with the surface 21 of the heater core 15 is an acute angle. For this reason, for example, the air after being guided by the guide plate 22 is less likely to enter the surface 21 of the heater core 15 as compared with the case where the guide plate 22 is formed so that the angle with the surface 21 of the heater core 15 is a right angle. Therefore, it is possible to suppress the air after being guided from being heated on the surface 21 of the heater core 15. Further, in the present embodiment, a plurality of guide plates 22 are provided along the air flow (indicated by arrow N in FIG. 1). For this reason, compared with the case of single, it will guide in the direction which separates air in several places, and it can suppress that air is heated more suitably.

  Further, when the guide plate 22 is provided on the surface 21 of the heater core 15 exposed to the air passage 13, the guide plate 22 can serve as a ventilation resistance for air passing through the air passage 13. When the guide plate 22 is inclined as described above, for example, the ventilation resistance is lower than when the angle between the guide plate 22 and the surface 21 of the heater core 15 is a right angle. For this reason, by heating the guide plate 22 as described above, heating of air can be suppressed while suppressing ventilation resistance.

  Furthermore, in this embodiment, the guide plate 22 is not provided on the surface 24b of the first tank portion 17, but is provided only on the surface 24a. The reason why the guide plate 22 is not provided on the surface 24b is that, even if the guide plate 22 is provided on the surface 24b, the effect of suppressing air heating cannot be expected so much. If the guide plate 22 is provided, the ventilation resistance increases. It is. For this reason, about the 1st tank part 17, by providing the guide plate 22 only in the surface 24a, it can suppress appropriately that air is heated by the surface 23 of the core part 16, further suppressing ventilation resistance.

  By the way, when the user desires an intermediate temperature between the maximum hot time and the maximum cool time, the rotation angle of the heater core 15 is adjusted, and the heater core 15 is disposed at an arbitrary position between the entire heating position and the non-heating position. . In this state, the warm air that has passed through the core portion 16 of the heater core 15 and the cool air that has bypassed the heater core 15 are mixed on the leeward side of the heater core 15 and sent out from the blowout port 19. As a result, the blowing temperature is set to an intermediate temperature desired by the user.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIG. In the following embodiments, the same or corresponding components as those of the first embodiment described above are denoted by the same reference numerals and description thereof is omitted. The second embodiment is different from the first embodiment in that the heater core 15 is configured to slide.

  In the case 12, a storage portion 25 for storing the heater core 15 is provided on the windward side of the bent portion 13 a of the air passage 13 and outside the air passage 13. That is, the storage portion 25 is recessed so as to open to the air passage 13. The heater core 15 is configured to slide between the storage unit 25 and the air passage 13. Specifically, a non-heated position (shown by a solid line in FIG. 4) where air does not pass through the core portion 16 of the heater core 15 and a heating position where the most air flowing through the air passage 13 passes through the core portion 16 due to slide movement. (Indicated by a two-dot chain line in FIG. 4).

  In the non-heating position, the entire amount of air that has been stored in the storage portion 25 and has passed through the evaporator 14 does not pass through the core portion 16 of the heater core 15 and flows to the leeward air outlet 19. In this state, of the two tank parts 17 and 18, the second tank part 18 is located in the back part of the storage part 25, and the surface 24b orthogonal to the surface 23 of the core part 16 in the first tank part 17 is air. It is exposed to the passage 13. On the other hand, in the heating position, the first tank portion 17 of the heater core 15 is disposed closest to the inner surface of the case 12 facing the storage portion 25. The air that has passed through the evaporator 14 passes through the core portion 16 of the heater core 15, is heated by the core portion 16, and flows to the air outlet 19 on the leeward side. And the blowing temperature of the air which flows into the blower outlet 19 can be adjusted by adjusting the sliding position of the heater core 15 between both above-mentioned positions.

  A guide plate 22 is provided on the surface 24b of the first tank portion 17 of the heater core 15 exposed to the air passage 13 at the non-heating position indicated by a solid line in FIG. In the present embodiment, two guide plates 22 are provided on the surface 24b of the first tank portion 17 along the air flow (indicated by an arrow N in FIG. 1).

  In the air conditioning unit 11 having such a configuration, when the heater core 15 is disposed at the non-heating position, the air that has passed through the evaporator 14 will flow on the surface 24 b of the first tank portion 17 exposed to the air passage 13. And However, the air is guided by the guide plate 22 provided on the surface 24 b of the first tank portion 17 so as to flow in a direction away from the heater core 15. As a result, the air flowing through the surface 21 of the heater core 15 is not heated by the surface 24b of the first tank portion 17, and it is possible to suppress the air from being heated during the max cool.

  In addition, when the heater core 15 configured to slide and move as described above is used, air flows through the same air passage 13 at the time of max cool or max hot, unlike the case of using an air mix door as in the prior art. As a result, even if the heater core 15 is accommodated in the accommodating portion 25 at the non-heated position, a part of the heater core 15 is necessarily disposed so as to be exposed to the air passage 13. For this reason, in the air conditioning unit 11 including the heater core 15 that slides, the guide plate 22 is provided on the surface 21 of the heater core 15 exposed to the air passage 13 in the non-heated position, so that the maximum cooling capability at the time of max school is appropriately exhibited. can do.

(Other embodiments)
In addition, you may change the said embodiment as follows.

  In each embodiment described above, the number of guide plates 22 may be increased or decreased without being limited to the number described above. In each of the above embodiments, a plurality of guide plates 22 are provided, but a single guide plate 22 may be provided. In this case, the air conditioning unit having a configuration in which the heater core 15 rotates can be configured as shown in FIG. That is, in FIG. 4, the guide plate 22 is 1 on the surface 24 of the first tank portion 17 on the windward side along the surface 23 of the core portion 16 of the surface 21 of the heater core 15 exposed to the air passage 13 in the non-heating position. One is provided. Even in this case, before the air flowing through the air passage 13 flows through the surface 23 of the core portion 16, the air is separated from the heater core 15 by the guide plate 22 provided on the surface 24 of the first tank portion 17. You can guide it to flow.

  In each of the above embodiments, the flat guide plate 22 is provided on the surface 21 of the heater core 15. However, a block-shaped guide member may be provided on the surface 21 of the heater core 15.

  In each of the above embodiments, the guide plate 22 is formed so that the angle with the surface 21 of the heater core 15 is an acute angle, but may be formed so that the angle with the surface 21 of the heater core 15 is a right angle.

  In each of the above embodiments, the case 12 in which the air passage 13 is bent about 90 degrees in the middle thereof is used. However, the air passage 13 may be embodied by using a linear case 12.

  In the first embodiment, the heater core 15 can be moved between the non-heating position where the air does not pass through the core portion 16 and the entire heating position where all the air flowing through the air passage 13 passes through the core portion 16 of the heater core 15. However, the heater core 15 may be configured to be movable between the non-heating position and a heating position where a predetermined amount of air passes through the core portion 16 of the heater core 15.

  In the first embodiment, the guide plate 22 is provided only on the surface 24 a along the surface 23 of the core portion 16 of the surface 24 exposed to the air passage 13 in the first tank portion 17. The guide plate 22 may also be provided on the surface 24 b orthogonal to the surface 23. Further, the guide plate 22 may be provided on the entire surface 21 of the heater core 15 exposed at the non-heated position.

  In the second embodiment, a guide plate storage portion that stores a guide plate provided on the surface 24 of the first tank portion 17 at the heating position at a portion facing the storage portion 25 with the air passage 13 interposed therebetween. It may be provided. If it does in this way, it can be stuck to the inner surface of the 1st tank part 17 and air passage 13, and all the air which flows through an air passage at the time of max hot can be led to heater core 15 appropriately.

  In the second embodiment, at least the core portion 16 may be stored in the storage portion 25 in the non-heating position.

Sectional drawing which shows schematic structure of the air-conditioning unit by which the heater core which rotates in 1st Embodiment of this invention was arrange | positioned in the non-heating position. Sectional drawing which shows schematic structure of the air-conditioning unit by which the heater core similarly rotated and moved is arrange | positioned in all the heating positions. Sectional drawing which shows schematic structure of the air conditioning unit in 2nd Embodiment of this invention. Sectional drawing which shows schematic structure of the air conditioning unit in other embodiment of this invention.

Explanation of symbols

11 air conditioning unit 12 case 13 air passage 15 heater core (heat exchanger for heating)
20 Rotating shaft 21 Heater core surface (heating heat exchanger surface)
22 Guide plate (guide member)
25 Storage section

Claims (5)

A case that forms an air passage; and a heating heat exchanger that is provided in the case and heats air passing therethrough, and the heating heat exchanger is non-heated in which air does not pass through the heating heat exchanger. In an air conditioning unit configured to be movable between a position and a heating position where air passes through the heating heat exchanger, and adjusting the air blowing temperature by adjusting the amount of movement,
A guide member that guides the air flowing on the surface of the heating heat exchanger to flow away from the heating heat exchanger when arranged on the non-heating position on the surface of the heating heat exchanger. An air conditioning unit characterized by providing. The heating heat exchanger is configured to be movable between the non-heating position and the heating position by rotating about a rotating shaft, and the air blowing temperature is adjusted by adjusting the rotation angle. , Arranged so as to be exposed to the air passage even in the non-heated position,
2. The air conditioning unit according to claim 1, wherein the guide member is provided on a surface of the heating heat exchanger exposed to the air passage at the non-heating position. The case includes a storage unit that stores the heating heat exchanger outside the air passage, and the heating heat exchanger is stored in the storage unit in the non-heating position, and the storage unit and the air It is configured to be movable between the non-heated position and the heated position by sliding between the passage, and by adjusting the slide position, the air blowing temperature is adjusted, even in the non-heated position. Arranged to be exposed in the air passage,
2. The air conditioning unit according to claim 1, wherein the guide member is provided on a surface of the heating heat exchanger exposed to the air passage at the non-heating position. The air conditioning unit according to any one of claims 1 to 3, wherein the guide member is formed so that an angle with the surface of the heating heat exchanger is an acute angle. 5. The air conditioning unit according to claim 1, wherein a plurality of the guide members are provided on the surface of the heating heat exchanger along the flow of the air.

Images