JP2016173223A - Air conditioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve heat exchange efficiency of a cooling heat exchanger 40.SOLUTION: A vehicular air conditioning device 1 includes an air blower 30 disposed on the downstream side of an air flow relative to a cooling heat exchanger 40. In an air flowing direction Ya between the cooling heat exchanger 40 and a suction port 34a of the air blower 30, an air outlet surface 40a of the cooling heat exchanger 40 and a suction port 34a are overlapped with each other, and an axial direction of a rotating shaft 31a is orthogonal to the air outlet surface 40a. The suction port 34a is disposed on the cooling heat exchanger 40 side, and a suction port 34b is disposed on the side opposite to the cooling heat exchanger 40 relative to the suction port 34a. Cold air is made to flow from a projection region 40X of the cooling heat exchanger 40 to the suction port 34a, and cold air is made to flow from a peripheral region 40Y of the cooling heat exchanger 40 to the suction port 34b.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an air conditioner.

  Conventionally, in a vehicle air conditioner, an evaporator that is disposed in an air conditioning casing and cools air sucked from at least one of an inside air inlet and an outside air inlet, and an air flow downstream of the evaporator in the air conditioning casing. There is a vehicle interior air conditioning unit that includes a blower that is arranged and sucks an airflow that has passed through an evaporator and blows out the airflow toward the vehicle interior (see, for example, Patent Document 1).

  In this device, the blower has a centrifugal fan that is rotationally driven by the rotating shaft of the electric motor and sucks in from the one axial side of the rotating shaft and blows it outward in the radial direction, and an air suction port that houses the centrifugal fan and sucks the air flow. And a scroll casing that collects an air flow blown from the centrifugal fan and blows it out into the passenger compartment.

  Here, the electric motor and the evaporator are arranged so that the axial direction of the rotating shaft of the electric motor is parallel to the air outlet surface that blows the passing air flow out of the evaporator.

JP 2011-126401 A

  The inventor pays attention to the wind speed distribution of the air flow passing through the evaporator 1 while directing the axial direction one side of the rotating shaft 2a toward the air outlet surface 1a of the evaporator 1, and the axial direction with respect to the air outlet surface 1a. The vehicle interior air conditioning unit 4 (see FIG. 9) in which the blower 3 and the evaporator 1 are arranged so as to be orthogonal to each other was examined.

  According to the study of the present inventor, the air suction port 3b of the scroll casing 3a of the evaporator 1 is projected from the other side in the axial direction (see FIG. 10), and the evaporator 1 is formed around the projection area 5a. It was found that there was a difference in the wind speed of the air flow with the surrounding area 5b.

  That is, the wind speed of the airflow passing through the projection area 5a is higher than the wind speed of the airflow passing through the surrounding area 5b. For this reason, in the evaporator 1, since a difference arises in heat exchange between the projection area 5a and the surrounding area 5b, the efficiency of heat exchange of the evaporator is lowered.

  In view of the above points, an object of the present invention is to provide an air conditioner that suppresses the occurrence of unevenness in the wind speed distribution of an air flow passing through a heat exchanger.

In order to achieve the above object, in the invention according to claim 1, an air conditioning casing (20) that circulates an air flow toward the room;
A first heat exchanger (40) disposed in the air conditioning casing for exchanging heat with the airflow;
The first and second suction ports (34a, 34b) are disposed downstream of the air flow with respect to the first heat exchanger and suck the air flow that has passed through the first heat exchanger. A blower (30) that circulates the air flow into the air conditioning casing by blowing out the air flow sucked from the suction port of 2 into the room,
One of the first and second suction ports is disposed on the first heat exchanger side, and the remaining suction ports are disposed on the opposite side of the first heat exchanger with respect to the one suction port. It is characterized by.

  According to the first aspect of the present invention, one of the first and second suction ports is disposed on the first heat exchanger side, and the remaining suction ports are in relation to the one suction port. Arranged on the opposite side of the first heat exchanger. Therefore, an air flow is blown out from the first region (40X) of the first heat exchanger to the first suction port, and the second suction from the second region (40Y) other than the first region of the first heat exchanger. Airflow flows through the mouth. For this reason, it can suppress that a nonuniformity arises in the wind speed distribution of the airflow which passes a 1st heat exchanger. Therefore, the wind speed of the airflow passing through the first heat exchanger can be made uniform. Therefore, since unevenness in the heat exchange of the first heat exchanger is suppressed, the efficiency of heat exchange in the first heat exchanger can be improved.

  In addition, in the first aspect of the present invention, the blower is provided with first and second suction ports. For this reason, compared with the conventional air blower provided with one suction inlet, the opening area for sucking an airflow in a air blower can be enlarged. Along with this, the wind speed of the air flow sucked into the first and second suction ports can be lowered, so that the pressure loss generated when the air flow is sucked into the first and second suction ports is reduced and noise is reduced. Can be reduced.

  Specifically, in the invention according to claim 2, in the flow direction (Ya) of the air flow between the first heat exchanger and the one suction port, the air outlet that blows out the air flow in the first heat exchanger. The first heat exchanger and the blower are arranged so that the surface (40a) and one suction port overlap.

  However, the flow direction of the air flow is a direction in which the main flow with the largest airflow flows among the air flows flowing between the first heat exchanger and the one suction port.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

1 is a vehicle mounting diagram of an air conditioning unit for a rear seat of a vehicle air conditioner according to a first embodiment of the present invention. It is sectional drawing of the air conditioning unit for rear seats in FIG. FIG. 3 is a sectional view taken along line III-III in FIG. 2. It is the figure which looked at the air exit surface of the heat exchanger for cooling in FIG. 2 from the axial direction other side. It is sectional drawing corresponding to FIG. 2 in the air conditioning unit for rear seats of 2nd Embodiment of this invention. It is VI-VI sectional drawing in FIG. It is sectional drawing corresponding to FIG. 2 in the air conditioning unit for rear seats in 3rd Embodiment of this invention. It is sectional drawing corresponding to FIG. 2 in the air conditioning unit for rear seats in 4th Embodiment of this invention. It is sectional drawing of the air conditioning unit for rear seats in the comparative example of this invention. FIG. 10 is a diagram of the evaporator viewed from the other side in the axial direction in FIG. 9.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, parts that are the same or equivalent to each other are given the same reference numerals in the drawings in order to simplify the description.

(First embodiment)
1 and 2 show a vehicle air conditioner of this embodiment according to the present invention. The front and rear arrows in FIG. 1 indicate directions in the vehicle mounted state, respectively.

  The automobile 1 in which the vehicle air conditioner is mounted includes a rear space 1c on the rear side in the vehicle traveling direction with respect to the front seat 1a and the rear seat 1b in the vehicle interior. The rear space 1c is used for the rear seat arrangement and luggage compartment.

  The vehicle air conditioner of the present embodiment includes a rear seat air conditioning unit 10 that air-conditions the vehicle interior rear seat side, in addition to the front seat air conditioning unit (not shown) that air-conditions the vehicle interior front seat side.

  The air conditioning unit for the front seat is a well-known unit that is disposed at the substantially central portion in the left-right direction of the vehicle (that is, in the vehicle width direction) inside the instrument panel 1d (instrument panel) at the foremost part of the vehicle interior. For this reason, description of the front seat air conditioning unit is omitted.

  As shown in FIG. 1, the rear seat air conditioning unit 10 is disposed on the rear side in the vehicle traveling direction with respect to the front seat 1 a in the vehicle compartment. That is, the rear seat air conditioning unit 10 is disposed on the rear side in the vehicle traveling direction with respect to the instrument panel 1d. More specifically, the rear seat air conditioning unit 10 is arranged on the rear side in the vehicle traveling direction with respect to the rear door. The rear seat air conditioning unit 10 of the present embodiment is disposed on the right side in the vehicle left-right direction.

  The rear seat air conditioning unit 10 is disposed between the outer plate and the quarter trim. The outer plate is an outer plate exposed to the right side in the vehicle left-right direction outside the automobile. The quarter trim is an inner wall that is disposed on the rear side in the vehicle traveling direction with respect to the front seat 1a in the vehicle interior and is exposed to the vehicle interior.

  The rear seat air conditioning unit 10 constitutes a so-called “fan suction layout” in which the blower 30 is disposed on the downstream side of the air flow with respect to the cooling heat exchanger 40 in the air conditioning casing 20.

  Specifically, as shown in FIGS. 2 and 3, the rear seat air conditioning unit 10 includes an air conditioning casing 20, a blower 30, and a cooling heat exchanger 40. An air outlet surface 40a indicated by a chain line in FIG. 3 indicates a region obtained by projecting the air outlet surface 40a from one axial direction side.

  The air-conditioning casing 20 forms an outer shell thereof, and also forms an air passage for indoor blown air that is blown toward the rear seat side of the vehicle interior. The air conditioning casing 20 is molded of a resin (for example, polypropylene) having a certain degree of elasticity and excellent in strength.

  An inlet 21 for introducing an air flow from the passenger compartment is formed in the airflow casing 20 on the front side in the vehicle traveling direction and at the most upstream portion of the air passage formed in the air conditioning casing 20. The introduction port 21 opens to the front side in the vehicle traveling direction. A blow-off opening 22 is formed on the rear side in the vehicle traveling direction of the air-conditioning casing 20 to blow an air flow toward the rear seat side of the vehicle interior.

  The blower 30 is disposed on the downstream side of the air flow with respect to the air conditioning casing 20. The blower 30 constitutes a so-called “double suction double fan” in which an air flow is sucked from the two suction ports 34a, 34b by the two fans 32a, 32b. Specifically, the blower 30 is a blower including an electric motor 31, fans 32 a and 32 b, and a scroll casing 33. In the present embodiment, sirocco fans are used as the fans 32a and 32b.

  The electric motor 31 rotates the fans 32a and 32b by the rotating shaft 31a. The rotating shaft 31a of the electric motor 31 is disposed so as to extend in the vehicle traveling direction. For this reason, the axial direction of the rotating shaft 31a corresponds to the vehicle traveling direction. The electric motor 31 is disposed on the rear side in the vehicle traveling direction with respect to the fans 32a and 32b.

  The fans 32 a and 32 b are fixed to the rotating shaft 31 a of the electric motor 31. The fan 32a is disposed on the front side in the vehicle traveling direction, and the fan 32b is disposed on the rear side in the vehicle traveling direction. The rotation of the fan 32a sucks an air flow through the suction port 34a and blows it outward in the radial direction. The rotation of the fan 32b sucks an air flow through the suction port 34b and blows it outward in the radial direction.

  The scroll casing 33 has suction ports 34a and 34b, and houses the fans 32a and 32b (see FIG. 2).

  The suction ports 34 a and 34 b are each formed by a scroll casing 33. The suction ports 34a and 34b are arranged in the vehicle traveling direction. The suction port 34a opens to the front side in the vehicle traveling direction. The suction port 34b opens to the rear side in the vehicle traveling direction. That is, the suction port 34a opens on one side in the axial direction of the rotating shaft 31a, and the suction port 34b opens on the other side in the axial direction of the rotating shaft 31a. Specifically, the suction port 34a is disposed on the cooling heat exchanger 40 side, and the suction port 34b is disposed on the opposite side of the cooling heat exchanger 40 with respect to the suction port 34a.

  The scroll casing 33 collects the air blown from the fans 32 a and 32 b and blows it out from the blowout opening 35. The blowout opening 35 is connected to the blowout opening 22 through the duct 50. The blowout opening 22 communicates with the rear seat side space 4 of the vehicle compartment via a duct (not shown).

  Here, an air passage 23 is formed on the radially outer side of the rotary shaft 31 a with respect to the scroll casing 33 in the air conditioning casing 20. The air passage 23 plays a role of guiding the air flow blown out from the cooling heat exchanger 40 to the suction port 34b.

  The cooling heat exchanger 40 is disposed on the air flow upstream side of the blower 30 in the air conditioning casing 20. The cooling heat exchanger 40 is one of devices constituting a well-known vapor compression refrigeration cycle (not shown), and evaporates the low-pressure refrigerant in the refrigeration cycle to exert an endothermic effect, thereby providing an air conditioning casing. The heat exchanger cools the air flow sucked through 20 inlets 21.

  The cooling heat exchanger 40 is formed in a flat shape from a plurality of tubes, first and second tanks, and heat exchange fins. The plurality of tubes are arranged in a direction orthogonal to the air flow. The first tank diverts the refrigerant flowing from the expansion valve to each of the plurality of tubes. The second tank collects the refrigerant flowing out from the plurality of tubes and flows it to the compressor side. A heat exchange fin is arrange | positioned at each surface of a several tube, and promotes the heat exchange between a refrigerant | coolant and air. Thus, the cooling heat exchanger 40 passes the air flow in the thickness direction, thereby cooling the air flow with the refrigerant and blowing out cold air.

  Of the heat exchanger 40 for cooling, the air outlet surface 40a for blowing out the cold air is arranged so as to face the rear side in the vehicle traveling direction. The air outlet surface 40a of the cooling heat exchanger 40 is orthogonal to the vehicle traveling direction. The air outlet surface 40 a is a heat radiating surface formed on the air downstream side in the thickness direction of the cooling heat exchanger 40.

  In the present embodiment, the cooling heat exchanger 40 and the blower 30 are arranged so that the air outlet surface 40a of the cooling heat exchanger 40 and the suction port 34a of the scroll casing 33 overlap in the air flow direction Ya. . In particular, the cooling heat exchanger 40 and the blower 30 are arranged so that the axial direction of the rotary shaft 31a is orthogonal to the air outlet surface 40a of the cooling heat exchanger 40.

  Here, the flow direction Ya is the direction in which the main flow with the highest airflow flows among the air flows flowing from the air outlet surface 40a of the cooling heat exchanger 40 to the suction port 34a of the scroll casing 33.

  Next, the operation of the rear seat air conditioning unit 10 of this embodiment will be described.

  First, when the electric motor 31 rotates the fans 32 a and 32 b in the blower 30, an air flow that flows from the inlet 21 toward the blower 30 is generated in the air conditioning casing 20.

  The airflow introduced into the air conditioning casing 20 from the passenger compartment through the introduction port 21 passes through the cooling heat exchanger 40 in the thickness direction. At this time, the air flow is cooled by the refrigerant in the plurality of tubes and blown out from the air outlet surface 40a as cold air. The blown-out cool air flows from the air outlet surface 40a toward the blower 30 as indicated by arrows Ya and Yb.

  Here, a projection area in which the suction port 34a is projected from the other side in the axial direction in the cooling heat exchanger 40 is defined as a projection area 40X, and an area formed around the projection area 40X in the cooling heat exchanger 40 is defined as a surrounding area. The region 40Y is assumed (see FIG. 4). The surrounding area 40Y is an area overlapping with the air passage 23 in the axial direction in the heat exchanger 40 for cooling.

  Along with the rotation of the fan 32a, the cool air from the projection region 40X of the cooling heat exchanger 40 flows into the scroll casing 33 through the suction port 34a as indicated by the arrow Ya. For this reason, the fan 32a sucks the cold air from the projection region 40X of the cooling heat exchanger 40 through the suction port 34a and blows it out to the outside in the radial direction of the rotating shaft 31a.

  Along with the rotation of the fan 32b, the cool air from the surrounding area 40Y of the cooling heat exchanger 40 passes through the air passage 23 as indicated by the arrow Yb and then flows into the scroll casing 33 through the suction port 34b. For this reason, the fan 32b sucks the cool air from the surrounding area 40Y of the heat exchanger 40 for cooling through the air passage 23 and the suction port 34b and blows it outward in the radial direction of the rotating shaft 31a.

  In this manner, the cold air blown out from the fans 32 a and 32 b is collected by the scroll casing 33 and guided into the duct 50 from the blowout opening 35. The cold wind guided into the duct 50 is blown out from the blowout opening 22 to the rear seat side space 4 through a duct (not shown). Thereby, the rear seat side space 4 can be air-conditioned.

  According to this embodiment described above, the vehicle air conditioner 1 includes an air conditioning casing 20 that circulates an air flow toward the vehicle interior, and a cooling heat exchanger that is disposed in the air conditioning casing 20 and cools the air flow. 40 and a blower 30 disposed on the downstream side of the air flow with respect to the cooling heat exchanger 40. The blower 30 includes a scroll casing 33 including suction ports 34a and 34b for sucking cold air from the cooling heat exchanger 40, and blows out the cold air sucked from the suction ports 34a and 34b into the air conditioning casing 20. Fans 32a and 32b for circulating an air flow are provided.

  Here, in the air flow direction Ya between the cooling heat exchanger 40 and the suction port 34a, the air outlet surface 40a and the suction port 34a of the cooling heat exchanger 40 overlap and rotate with respect to the air outlet surface 40a. The axial direction of the shaft 31a is orthogonal. The suction port 34a is disposed on the cooling heat exchanger 40 side, and the suction port 34b is disposed on the opposite side of the cooling heat exchanger 40 with respect to the suction port 34a.

  Therefore, cool air flows from the projection region 40X of the cooling heat exchanger 40 to the suction port 34a, and cool air flows from the surrounding region 40Y of the cooling heat exchanger 40 to the suction port 34b. For this reason, the difference between the wind speed of the airflow passing through the projection area 40X and the wind speed of the airflow passing through the surrounding area 40Y is reduced. Therefore, the difference in heat exchange between the projection region 40X and the surrounding region 40Y is reduced, and the efficiency of heat exchange of the cooling heat exchanger 40 can be improved.

  In the present embodiment, the blower 30 is provided with suction ports 34a and 34b. For this reason, compared with the conventional air blower provided with one suction inlet, the opening area for sucking an airflow in the air blower 30 can be enlarged. In connection with this, the opening area of a suction inlet can be enlarged by providing the two suction inlets 34a and 34b in the air blower 30. FIG. Accordingly, the wind speed of the airflow passing through the suction ports 34a and 34b can be reduced. For this reason, it is possible to reduce the noise by reducing the pressure loss generated when the air flow is sucked into the suction ports 34a and 34b.

(Second Embodiment)
In the second embodiment, the rear seat air conditioning unit 10 in which a heating heat exchanger and an air mix door are added in the first embodiment will be described.

  Next, the rear seat air conditioning unit 10 of this embodiment will be described with reference to FIGS. 5 and 6.

  As shown in FIGS. 5 and 6, the rear seat air conditioning unit 10 of the present embodiment includes an air conditioning casing 20, a blower 30, a cooling heat exchanger 40, a duct 50 </ b> A, a heating heat exchanger 60, and an air mix door. 70.

  The air conditioning casing 20, the blower 30, and the cooling heat exchanger 40 in FIG. 5 are the same as the air conditioning casing 20, the blower 30, and the cooling heat exchanger 40 in FIG. Therefore, description of the air conditioning casing 20, the blower 30, and the cooling heat exchanger 40 will be omitted, and the duct 50A, the heating heat exchanger 60, and the air mix door 70 will be described below.

  The duct 50 </ b> A is used in place of the duct 50 in FIG. 3, and includes an intake port 51 for sucking an air flow blown from the blowing opening 35 of the scroll casing 33, and an air flow sucked through the suction port 51. Are provided with blowout openings 52 and 53 for blowing the air toward the rear seat side space 4.

  The blow-out opening 52 is connected to a face blow-out port that blows out to the upper occupant seated in the rear seat via a duct (not shown). The blowout opening 53 is connected to a foot blowout opening that blows out to the lower half of the occupant seated on the rear seat via a duct (not shown).

  A heat exchanger 60 for heating and an air mix door 70 are disposed in the duct 50A.

  The heating heat exchanger 60 is a heat exchanger that heats the cold air sucked through the suction port 51. In the present embodiment, as the heat exchanger 60 for heating, an electric heater that heats cold air with electric power or a hot water heater unit that heats with hot water as engine cooling water is used.

  The duct 50 </ b> A includes a bypass passage 61 through which the cold air from the suction port 51 bypasses the heating heat exchanger 60 and flows to the outlet openings 52 and 53, and the cold air that has passed through the bypass passage 61 and the heating heat exchanger 60. A mixing chamber 54 for mixing with the hot air blown out is formed.

  The air mix door 70 adjusts the ratio of the amount of cold air flowing through the heating heat exchanger 60 and the amount of cold air flowing through the bypass passage 61 out of the amount of cold air sucked through the suction port 51.

  In the present embodiment, the suction port 51 of the duct 50 </ b> A is disposed inside the air conditioning casing 20. Outlet openings 52 and 53, bypass passage 61, and mixing chamber 54 in duct 50 </ b> A are arranged on the outer side with respect to air conditioning casing 20 and on the eastern region improvement side. The heat exchanger 60 for heating is arrange | positioned on the outer side with respect to the air-conditioning casing 20, and the heaven district improvement side.

  Next, the operation of the rear seat air conditioning unit 10 of this embodiment will be described.

  First, in the blower 30, the electric motor 31 rotates the fans 32a and 32b. Then, as in the first embodiment, the fan 32a sucks the cold air from the projection region 40X of the cooling heat exchanger 40 through the suction port 34a and blows it outward in the radial direction of the rotating shaft 31a. The fan 32b sucks cold air from the surrounding area 40Y of the cooling heat exchanger 40 through the air passage 23 and the suction port 34b and blows it out to the outside in the radial direction of the rotating shaft 31a. The cool air blown from the fans 32a and 32b is collected by the scroll casing 33 and guided into the duct 50A from the blowout opening 35.

  Part of the amount of cold air introduced into the duct 50 </ b> A flows into the heating heat exchanger 60. For this reason, the cold air is heated by the heating heat exchanger 60 and blown out to the mixing chamber 54 as hot air. On the other hand, the remaining cold air other than the cold air flowing through the heating heat exchanger 60 out of the amount of cold air guided into the duct 50 </ b> A passes through the bypass passage 61 and flows into the mixing chamber 54. For this reason, in the mixing chamber 54, the cold air that has passed through the bypass passage 61 and the hot air blown from the heat exchanger 60 for heating are mixed, and the mixed air flow is supplied to the blowout openings 52 and 53 as conditioned air. Flowing.

  As described above, the air mix door 70 adjusts the ratio between the amount of cold air flowing through the heating heat exchanger 60 and the amount of cold air flowing through the bypass passage 61. Thereby, the temperature of the conditioned air flowing from the mixing chamber 54 to the blowing openings 52 and 53 can be adjusted.

  The conditioned air flowing from the mixing chamber 54 to the blowout opening 52 is blown into the rear seat side space 4 through a duct (not shown) and a face blowout port. The conditioned air flowing from the mixing chamber 54 to the blowout opening 53 is blown out to the rear seat side space 4 through a duct (not shown) and a foot blowout port. Thereby, the rear seat side space 4 can be air-conditioned.

  According to the present embodiment described above, the air outlet surface 40a of the cooling heat exchanger 40 and the suction in the air flow direction Ya between the cooling heat exchanger 40 and the suction port 34a, as in the first embodiment. The opening 34a overlaps, and the axial direction of the rotary shaft 31a is orthogonal to the air outlet surface 40a. The suction port 34a is disposed on the cooling heat exchanger 40 side, and the suction port 34b is disposed on the opposite side of the cooling heat exchanger 40 with respect to the suction port 34a.

  Therefore, cool air flows from the projection region 40X of the cooling heat exchanger 40 to the suction port 34a, and cool air flows from the surrounding region 40Y of the cooling heat exchanger 40 to the suction port 34b. For this reason, in the heat exchanger 40 for cooling, it can suppress that the nonuniformity of the wind speed distribution of an airflow arises. Therefore, the heat exchange efficiency of the cooling heat exchanger 40 can be improved. In addition to this, the opening area of the suction port can be increased by providing the blower 30 with the two suction ports 34a and 34b. Along with this, the wind speed of the airflow passing through the suction ports 34a and 34b can be lowered, so that pressure loss can be reduced and generation of noise can be suppressed.

(Third embodiment)
In the third embodiment, in the second embodiment, two air mix doors are provided to independently adjust the temperature of the air blown to the left rear seat in the vehicle interior and the temperature of the air blown to the right rear seat in the vehicle compartment. The rear seat air conditioning unit 10 will be described.

  Next, the rear seat air conditioning unit 10 of this embodiment will be described with reference to FIG.

  In the rear seat air conditioning unit 10 of the present embodiment, air mix doors 70A and 70B are provided in the rear seat air conditioning unit 10 of FIGS.

  The air mix door 70A is disposed in the right air passage 80a of the duct 50A. The air mix door 70B is disposed in the left air passage 80b in the duct 50A. The right air passage 80a and the left air passage 80b are separated by a partition wall 90. The heating heat exchanger 60 is disposed so as to straddle the right air passage 80a and the left air passage 80b.

  The right air passage 80a is an air passage that guides the cool air sucked from the suction port 51 to the right outlet openings 52a and 53a. Specifically, the right air passage 80a includes a right bypass passage and a right mixing chamber 54a. In addition, illustration of the right side blowing opening part 53a in FIG. 7 is abbreviate | omitted.

  The right bypass passage allows the cold air from the suction port 51 to bypass the heating heat exchanger 60 and flow to the right mixing chamber 54a. The right mixing chamber 54 a mixes the cold air that has passed through the right bypass passage and the hot air blown out from the heating heat exchanger 60.

  The air mix door 70A adjusts the ratio of the amount of cold air flowing through the heating heat exchanger 60 and the amount of cold air flowing through the right bypass passage out of the amount of cold air sucked into the right air passage 80a via the suction port 51.

  The right outlet openings 52a and 53a are provided in place of the outlet opening 52 in FIG. 5 in the duct 50A. The right outlet opening 52a is connected via a duct (not shown) to a face outlet that blows out to the upper body of the occupant seated in the right rear seat. The right outlet opening 53a is connected to a foot outlet that blows out to the lower half of the occupant seated on the right rear seat via a duct (not shown).

  The left air passage 80b is an air passage that guides the cool air sucked from the suction port 51 to the left outlet openings 52b and 53b. Specifically, the left air passage 80b includes a left bypass passage and a left mixing chamber 54b. In addition, illustration of the left side blowing opening part 53b in FIG. 7 is abbreviate | omitted.

  The left bypass passage allows the cold air from the suction port 51 to bypass the heating heat exchanger 60 and flow to the left mixing chamber 54b. The left mixing chamber 54b mixes the cold air that has passed through the left bypass passage and the hot air blown from the heating heat exchanger 60.

  The air mix door 70B adjusts the ratio of the amount of cold air flowing into the heating heat exchanger 60 and the amount of cold air flowing into the left bypass passage out of the amount of cold air sucked into the left air passage 80b through the suction port 51.

  The left outlet openings 52b and 53b are provided in place of the outlet openings 53 of FIG. 5 in the duct 50A. The left outlet 52b is connected via a duct (not shown) to a face outlet that blows out to the upper body of the occupant seated in the left rear seat. The left outlet opening 53b is connected via a duct (not shown) to a foot outlet that blows out to the lower half of the passenger seated on the left rear seat.

  The right side bypass passage and the left side bypass passage correspond to the bypass passage 61, respectively, and the right side mixing chamber 54 a and the left side mixing chamber 54 b correspond to the mixing chamber 54. The right outlet opening 52 a and the left outlet opening 52 b correspond to the outlet opening 52, and the right outlet opening 53 a and the left outlet opening 53 b correspond to the outlet opening 53.

  Next, the operation of the rear seat air conditioning unit 10 of this embodiment will be described.

  The blower 30 blows out cool air from the blowout opening 35 into the duct 50A, as in the first embodiment. For this reason, the cool air from the blowout opening 35 flows into the right air passage 80a and the left air passage 80b.

  The air mix door 70A adjusts the ratio of the amount of cold air flowing through the heating heat exchanger 60 to the amount of cold air flowing through the right bypass passage out of the amount of cold air flowing through the right air passage 80a. Thus, the temperature of the conditioned air flowing from the right mixing chamber 54a to the blowout openings 52a and 52b can be adjusted. For this reason, the temperature of the conditioned air flowing from the right mixing chamber 54a to the outlet openings 52a and 52b can be adjusted. Thereby, the temperature of the conditioned air blown out to the right rear seat can be adjusted.

  The air mix door 70B adjusts the ratio of the amount of cold air flowing through the heating heat exchanger 60 and the amount of cold air flowing through the left bypass passage out of the amount of cold air flowing through the left air passage 80b. Thus, the temperature of the conditioned air flowing from the left mixing chamber 54b to the blowout openings 52b and 53b can be adjusted. For this reason, the temperature of the conditioned air flowing from the left mixing chamber 54b to the blowing openings 52b and 53b can be adjusted. Thereby, the temperature of the conditioned air blown to the left rear seat can be adjusted.

  As described above, the temperature of the conditioned air blown to the right rear seat and the temperature of the conditioned air blown to the left rear seat can be independently adjusted by the air mix doors 70A and 70B.

  According to the present embodiment described above, as in the first embodiment, the cool air flows from the projection region 40X to the suction port 34a in the cooling heat exchanger 40 and the surrounding region in the cooling heat exchanger 40. Cold air flows from 40Y to the suction port 34b. For this reason, in the heat exchanger 40 for cooling, it can suppress that the nonuniformity of the wind speed distribution of an airflow arises. Therefore, the heat exchange efficiency of the cooling heat exchanger 40 can be improved. In addition to this, the opening area of the suction port can be increased by providing the blower 30 with the two suction ports 34a and 34b. Along with this, the wind speed of the airflow passing through the suction ports 34a and 34b can be lowered, so that pressure loss can be reduced and generation of noise can be suppressed.

(Fourth embodiment)
In the said 2nd, 3rd embodiment, although the example which has arrange | positioned the heat exchanger 60 for a heating to the air flow downstream with respect to the air blower 30 was demonstrated, it replaced with this and the heat exchanger 60 for a heating was replaced with the air blower 30. The fourth embodiment arranged on the upstream side of the air flow will be described.

  Next, the rear seat air conditioning unit 10 of this embodiment will be described with reference to FIG.

  The rear seat air conditioning unit 10 of this embodiment is obtained by adding a heating heat exchanger 60 and air mix doors 70X and 70Y to the rear seat air conditioning unit 10 of the first embodiment. Therefore, hereinafter, the heat exchanger 60 for heating and the air mix doors 70X and 70Y will be described, and the description of other configurations will be simplified.

  The heating heat exchanger 60 is a second heat exchanger that is disposed between the blower 30 and the cooling heat exchanger 40 in the air conditioning casing 20. The heating heat exchanger 60 is disposed so as to face the suction port 34a. The heating heat exchanger 60 heats the cold air from the cooling heat exchanger 40 and blows out hot air. The air conditioning casing 20 is provided with bypass passages 61 a and 61 b that allow the cool air from the cooling heat exchanger 40 to flow to the blower 30 by bypassing the heating heat exchanger 60. The bypass passage 61a is located on the heaven region improvement side with respect to the heat exchanger 60 for heating. The bypass passage 61b is located on the lower side in the vertical direction with respect to the heat exchanger 60 for heating.

  The air mix door 70 </ b> X changes the ratio between the amount of air that passes through the upper heat exchange part 60 a of the heat exchanger 60 for heating and the amount of air that passes through the bypass passage 61 a. The air mix door 70Y changes the ratio between the amount of air that passes through the lower heat exchange section 60b of the heat exchanger 60 for heating and the amount of air that passes through the bypass passage 61b.

  Next, the operation of the rear seat air conditioning unit 10 of this embodiment will be described.

  First, when the electric motor 31 rotates the fans 32 a and 32 b in the blower 30, an air flow that flows from the inlet 21 toward the blower 30 is generated in the air conditioning casing 20.

  The airflow introduced into the air conditioning casing 20 from the passenger compartment through the inlet 21 is cooled by the cooling heat exchanger 40 and blown out from the air outlet surface 40a as cold air. The blown-out cool air flows from the air outlet surface 40a toward the blower 30 as indicated by arrows Ya and Yb.

  Along with the rotation of the fan 32a, the cool air from the projection region 40X of the cooling heat exchanger 40 flows to the heating heat exchanger 60 as indicated by an arrow Ya. For this reason, the cold air from the projection region 40X is heated by the heating heat exchanger 60 and flows into the scroll casing 33 through the suction port 34a as indicated by the arrow Yc as hot air. For this reason, the fan 32a sucks the warm air from the heating heat exchanger 60 through the suction port 34a and blows it out to the outside in the radial direction of the rotating shaft 31a.

  As the fan 32b rotates, the cool air from the surrounding area 40Y of the cooling heat exchanger 40 passes through the bypass passages 61 and 62 and the air passage 23 as indicated by the arrow Yb, and then passes through the suction port 34b to enter the scroll casing 33. Flowing into. Therefore, the fan 32b sucks the cold air from the surrounding area 40Y of the cooling heat exchanger 40 through the bypass passages 61 and 62, the air passage 23, and the suction port 34b and blows it out to the outside in the radial direction of the rotary shaft 31a.

  Thus, the airflow blown out from the fans 32a and 32b is collected by the scroll casing 33 and guided into the duct 50 from the blowout opening 35. Hot air and cold air guided into the duct 50 are blown out from the blowout opening 22 to the rear seat side space 4 through a duct (not shown).

  The air mix door 70 </ b> X changes the ratio between the amount of air that passes through the upper heat exchange part 60 a of the heat exchanger 60 for heating and the amount of air that passes through the bypass passage 61 a. The air mix door 70Y changes the ratio between the amount of air that passes through the lower heat exchange section 60b of the heat exchanger 60 for heating and the amount of air that passes through the bypass passage 61b. Thereby, the temperature of the airflow blown out from the scroll casing 33 to the rear seat side space 4 through the duct 50 or the like can be adjusted.

  According to the present embodiment described above, the cool air from the projection region 40X in the cooling heat exchanger 40 is heated by the heating heat exchanger 60 and flows as hot air to the suction port 34a, and the cooling heat exchange. Cold air flows from the surrounding area 40Y of the container 40 to the suction port 34b. For this reason, in the heat exchanger 40 for cooling, it can suppress that the nonuniformity of the wind speed distribution of an airflow arises. Therefore, the heat exchange efficiency of the cooling heat exchanger 40 can be improved. In addition to this, by providing the blower 30 with the two suction ports 34a and 34b, the opening area of the suction port can be increased. Along with this, the wind speed of the airflow passing through the suction ports 34a and 34b can be lowered, so that pressure loss can be reduced and generation of noise can be suppressed.

(Other embodiments)
(1) In the first to fourth embodiments, the cooling heat exchanger 40 and the blower 30 are arranged so that the axial direction of the rotary shaft 31a is orthogonal to the air outlet surface 40a of the cooling heat exchanger 40. However, if the axial direction of the rotating shaft 31a intersects the air outlet surface 40a of the cooling heat exchanger 40, the rotating shaft corresponds to the air outlet surface 40a of the cooling heat exchanger 40. It is not restricted to the case where the axial direction of 31a is orthogonal.

  (2) In the first to fourth embodiments described above, an example is described in which the rear seat air conditioning unit 10 disposed between the outer plate exposed to the right side in the vehicle left-right direction and the quarter trim is the air conditioning unit of the present invention. However, instead of this, the rear seat air conditioning unit 10 disposed between the outer plate exposed on the left side in the left-right direction of the vehicle and the quarter trim may be used as the air conditioning unit of the present invention. Alternatively, the rear seat air conditioning unit 10 arranged on the ceiling side in the passenger compartment may be the air conditioning unit of the present invention.

  (3) In the first embodiment, the example in which the cooling heat exchanger 40 as the cooling heat exchanger is used as the first heat exchanger of the present invention has been described. Instead, the air flow is heated. A heat exchanger for heating may be used as the heat exchanger of the present invention.

  (4) In the first to fourth embodiments, the example in which the rear seat air conditioning unit 10 is the air conditioning unit of the present invention has been described, but instead of this, a predetermined other than the rear seat side in the vehicle interior. An air conditioning unit that blows out an air flow to a place may be used as the air conditioning unit of the present invention.

  (5) In the first to fourth embodiments, the example in which the cooling heat exchanger 40 that cools the air with the refrigerant is used as the cooling heat exchanger has been described. However, instead of this, the heat exchange for cooling is performed. The air may be cooled using a Peltier element as a vessel.

  (6) In the first to fourth embodiments described above, the example using the heating heat exchanger 60 that heats the air with engine cooling water (hot water) as the heating heat exchanger has been described. The air may be heated using an electric heater as a heating heat exchanger.

  (7) In the first to fourth embodiments, the example using the sirocco fan, which is a centrifugal fan, has been described as the fans 32a, 32b. However, the present invention is not limited to this, and the fans 32a, 32b may be centrifugal fans. If it is, you may use various fans (a rear-facing fan, a silent fan, a limit road fan, etc.) other than a sirocco fan.

  (8) In the fourth embodiment, the example in which one second heat exchanger as the heat exchanger 60 for heating is arranged in the air conditioning casing 20 has been described, but instead of this, in the air conditioning casing 20 Two or more heating heat exchangers 60 as the second heat exchanger may be arranged.

  (9) In the first to fourth embodiments, the example in which the cooling heat exchanger 40 is used as the first heat exchanger of the present invention has been described. Instead, the first heat exchange of the present invention is used. A heat exchanger for heating may be used as the vessel.

  (10) In the first to fourth embodiments, the example in which the introduction port 21 of the air conditioning casing 20 is opened to the front side in the vehicle traveling direction has been described. However, the present invention is not limited thereto, and the introduction port 21 of the air conditioning casing 20 is opened. The direction may be any direction and may be opened to the rear side in the vehicle traveling direction. Or you may open the inlet 21 of the air-conditioning casing 20 in the vehicle width direction right side or the vehicle width direction left side. The mounting position of the blower 30 may be any position, and may be on the front side in the vehicle traveling direction or on the rear side in the vehicle traveling direction in the vehicle interior, regardless of the location.

  (11) In the first to fourth embodiments, the example in which the axial direction of the rotating shaft 31a of the electric motor 31 is made coincident with the vehicle traveling direction is not limited to this, but the rotating shaft 31a of the electric motor 31 is not limited thereto. The axial direction may be any direction.

  (12) In the first to fourth embodiments, the example in which the suction port 34a is disposed on the front side in the vehicle traveling direction and the suction port 34b is disposed on the rear side in the vehicle traveling direction has been described. The suction ports 34a and 34b may be arranged in any manner as long as the shaft 31a is opened on one side in the axial direction and the suction port 34b is opened on the other side in the axial direction.

  (13) In the first to fourth embodiments, the example in which the air conditioner of the present invention is a vehicle air conditioner has been described. Instead, various types of air conditioners for houses, air conditioners for buildings, etc. The air conditioner of the present invention may be applied to a stationary air conditioner or a moving air conditioner such as a train air conditioner, a ship air conditioner, and an airplane air conditioner.

  In addition, this invention is not limited to above-described embodiment, In the range described in the claim, it can change suitably. Further, the above embodiments are not irrelevant to each other, and can be combined as appropriate unless the combination is clearly impossible. In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily essential unless explicitly stated as essential and clearly considered essential in principle. Yes. Further, in each of the above embodiments, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is clearly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to the specific number except for the case. Further, in each of the above embodiments, when referring to the shape, positional relationship, etc. of the component, etc., the shape, unless otherwise specified and in principle limited to a specific shape, positional relationship, etc. It is not limited to the positional relationship or the like.

DESCRIPTION OF SYMBOLS 10 Rear seat air conditioning unit 20 Air conditioning casing 23 Air passage 30 Blower 31 Electric motor 31a Rotating shaft 32a, 32b Fan (1st, 2nd fan)
34a, 34b Suction port (first and second suction ports)
33 Scroll casing 40 Heat exchanger for cooling (first heat exchanger)
60 Heat exchanger for heating

Claims (6)

An air conditioning casing (20) that circulates an air flow toward the room;
A first heat exchanger (40) disposed in the air conditioning casing for exchanging heat with the air flow;
The first and second suction ports (34a, 34b) that are disposed downstream of the air flow with respect to the first heat exchanger and suck the air flow that has passed through the first heat exchanger, A blower (30) that circulates the air flow into the air conditioning casing by blowing out the air flow sucked from the first and second suction ports toward the room; and
One of the first and second suction ports is disposed on the first heat exchanger side, and the remaining suction ports are opposite to the first heat exchanger with respect to the one suction port. An air conditioner arranged on the side.   In the flow direction (Ya) of the air flow between the first heat exchanger and the one suction port, an air outlet surface (40a) for blowing out the air flow in the first heat exchanger and the one suction port The air conditioner according to claim 1, wherein the first heat exchanger and the blower are arranged so as to overlap with a mouth. The blower is
By rotating about the axis of the rotating shaft as the rotating shaft (31a) rotates, the air flow is sucked from the one side in the axial direction of the rotating shaft through the first suction port, and the diameter of the rotating shaft A first fan (32a) that blows outward in the direction,
A second fan that sucks the air flow from the other side in the axial direction through the second suction port and blows it outward in the radial direction by rotating about the axis of the rotation shaft as the rotation shaft rotates. 32b)
A blower casing (33) for guiding an air flow blown from the first and second fans toward the room;
The air conditioner according to claim 1 or 2, further comprising:   The said 1st heat exchanger and the said air blower are arrange | positioned so that the axial direction of the said rotating shaft may cross | intersect with respect to the air outlet surface which blows off the said air flow among the said 1st heat exchangers. Item 4. The air conditioner according to item 3. A cooling heat exchanger (40) as the first heat exchanger disposed in the air conditioning casing to cool the air flow;
The air conditioner according to any one of claims 1 to 4, further comprising a heating heat exchanger (60) for heating an air flow blown from the blower.   The air conditioner according to any one of claims 1 to 4, further comprising one or more second heat exchangers (60) disposed in the air conditioning casing and exchanging heat with the air flow. .

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