WO2015029395A1 - Back seat air conditioning unit - Google Patents

Abstract

In this back seat air conditioning unit (10), an evaporator (40) is arranged within a casing (20). The evaporator (40) is formed to a flattened shape, and heats or cools air passing through in the thickness direction, by a refrigerant flowing inside the evaporator (40). The evaporator (40) has an air outflow surface (40a) situated at the air downstream side in the thickness direction of the evaporator (40). The evaporator (40) is arranged such that the air outflow surface (40a) faces towards the left-right direction of the vehicle. Consequently, the dimension of the casing (20) in the left-right direction can be smaller, while giving the evaporator (40) a shape approximating a square when viewed from the thickness direction.

Description

Rear seat air conditioning unit Cross-reference of related applications

This application is based on Japanese Patent Application No. 2013-175837 filed on Aug. 27, 2013, the disclosure of which is incorporated herein by reference.

This disclosure relates to a rear seat air conditioning unit.

Conventionally, the rear seat air conditioning unit includes a casing, a cooling heat exchanger, and a heating heat exchanger. The cooling heat exchanger is disposed in the casing and cools air with a refrigerant. The heating heat exchanger heats cold air, which is disposed in the casing and blown out from the cooling heat exchanger, with hot water. Air whose temperature has been adjusted by a cooling heat exchanger or a heating heat exchanger is blown out to the rear seat side of the vehicle interior (see, for example, Patent Documents 1 and 2).

The cooling heat exchanger and the heating heat exchanger are formed in a flat shape, and heat exchange is performed on air passing in the thickness direction. Hereinafter, the cooling heat exchanger and the heating heat exchanger are collectively referred to as a heat exchanger.

In the heat exchanger of Patent Document 1, the air outflow surface faces the traveling direction. The air outflow surface is a heat dissipating surface located on the air downstream side in the thickness direction in the heat exchanger. As for the heat exchanger of the said patent document 2, the air outflow surface faces the up-down direction.

JP-A-10-236137 JP 2000-168346 A

The inventor of the present application examined mounting a rear seat air conditioning unit between the outer plate and the quarter trim in a vehicle such as MPV (Multi-Purpose Vehicle), SUV (Sport Utility Vehicle) or the like. The quarter trim is an inner wall disposed on the rear side in the vehicle traveling direction (hereinafter referred to as the traveling direction) with respect to the rear seat in the passenger compartment.

Recent vehicles such as MPV and SUV have a tendency to expand the passenger space in order to improve the comfort of the passenger compartment. Accordingly, the rear seat air conditioning unit mounted between the outer plate and the quarter trim is required to be thin. That is, in the rear seat air conditioning unit, it is required to reduce the size in the vehicle left-right direction (hereinafter referred to as the left-right direction).

However, the horizontal dimension of the rear seat air conditioning unit is determined by the horizontal dimension of the heat exchanger. For this reason, as in Patent Documents 1 and 2, when the heat exchanger is arranged so that the air outflow surface faces the traveling direction or the vehicle vertical direction (hereinafter referred to as the vertical direction), the rear seat air conditioning unit The dimensions increase.

In order to reduce the horizontal dimension of the air conditioning unit for the rear seat, the heat exchanger 40A has a vertically long shape (see FIG. 11B) in which the vertical dimension h is larger than the horizontal dimension W, or a horizontal dimension W larger than the vertical dimension h. It can be considered to have a horizontally long shape (see FIG. 11C).

In this case, when the heat exchanger 40A has a vertically long shape, the longitudinal dimension of a plurality of tubes through which a heat medium such as refrigerant or hot water flows increases. For this reason, the pressure loss of a heat medium increases and heat exchange efficiency falls.

On the other hand, when the heat exchanger 40A has a horizontally long shape, the dimension in the direction in which the plurality of tubes are arranged increases. For this reason, in the heat medium flowing through the plurality of tubes, the temperature distribution occurs in the direction in which the plurality of tubes are arranged. Specifically, in the plurality of tubes, a temperature difference is generated between the heat medium in the tube on the center side in the direction in which the plurality of tubes are arranged and the heat medium in the tube on the end side in the direction in which the tubes are arranged.

As described above, when the heat exchanger 40A has a vertically long shape or a horizontally long shape, the performance as a heat exchanger is deteriorated as compared with a shape in which the vertical dimension h and the horizontal dimension W are the same (see FIG. 11A). For this reason, measures such as an increase in the size of the heat exchanger 40A and an increase in the air volume are required, leading to an increase in cost.

In view of the above points, it is an object of the present disclosure to provide a rear seat air conditioning unit in which the size of the rear seat air conditioning unit itself is reduced while maintaining good performance as a heat exchanger. And

The rear seat air conditioning unit of the present disclosure is disposed on the rear side in the vehicle traveling direction with respect to the rear seat in the vehicle interior, and blows air toward the rear seat side of the vehicle interior. The rear seat air conditioning unit includes a casing and a heat exchanger. The casing is provided between an inner wall of the vehicle interior in the left-right direction of the vehicle and an outer plate on the outside of the vehicle in the left-right direction of the vehicle, and forms an air flow path through which the air flows. A heat exchanger is disposed in the casing to heat or cool the air. The heat exchanger is formed in a flat shape, and the air passes in the thickness direction. The heat exchanger is positioned such that an air outflow surface located on the air downstream side of the heat exchanger faces in the left-right direction.

Alternatively, the heat exchanger is formed in a flat shape that is thin in the thickness direction through which the air passes, and the heat exchanger is arranged such that an air outflow surface faces in the left-right direction of the vehicle in the heat exchanger. May be.

According to this, the dimension of the casing in the left-right direction can be reduced while the shape of the heat exchanger viewed from the thickness direction is made close to a square. For this reason, the dimension of the left-right direction of the air conditioning unit for rear seats can be made small, maintaining the performance as a heat exchanger favorably.

It is the figure which looked at the air conditioning unit for backseats in 1st Embodiment from the vehicle up-down direction upper side. It is the figure which looked at the air conditioning unit for rear seats of FIG. 1 from the vehicle up-down direction upper side. FIG. 3 is a sectional view taken along line III-III in FIG. It is a figure which shows the angle which the air outflow surface of a heat exchanger makes with respect to the left-right direction of a vehicle. It is the figure which looked at the air conditioning unit for back seats which is a comparative example from the vehicle up-down direction upper side. It is the figure which looked at the air conditioning unit for back seats which is a comparative example from the vehicle up-down direction upper side. It is the figure which looked at the air conditioning unit for backseats in 2nd Embodiment from the vehicle up-down direction upper side. It is the figure which looked at the air conditioning unit for backseats in 3rd Embodiment from the vehicle up-down direction upper side. It is the figure which looked at the air conditioning unit for backseats in 4th Embodiment from the vehicle up-down direction upper side. It is the figure which looked at the air conditioning unit for backseats in 5th Embodiment from the vehicle up-down direction upper side. It is a figure which shows the heat exchanger which concerns on a prior art example. It is a figure which shows the modification which made the heat exchanger which concerns on the prior art example shown to FIG. 11A vertically long shape. It is a figure which shows the modification which made the heat exchanger which concerns on the prior art example shown to FIG. 11A a horizontally long shape.

Hereinafter, embodiments of the present disclosure 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. In the following description, for example, as shown in FIG. 1, “front”, “rear”, “left”, “right”, “up” and “lower” are based on the traveling direction during normal traveling of the vehicle. Called.
(First embodiment)
1 and 2 show a vehicle air conditioner according to a first embodiment. The arrows in FIGS. 1 and 2 indicate directions in the vehicle mounted state.

The vehicle 1 in which the vehicle air conditioner is mounted includes a rear space 1c on the rear side of the vehicle with respect to the front seat 1a and the rear seat 1b. In the rear space 1c, a rear seat and a luggage room are provided. As the automobile 1 of the present embodiment, vehicles such as MPV (Multi-Purpose Vehicle) and SUV (Sport Utility Vehicle) are used.

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

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

The rear seat air conditioning unit 10 is disposed on the rear side of the vehicle with respect to the rear seat 1b in the passenger compartment. The rear seat air conditioning unit 10 is disposed rearward of the rear wheel shaft. The rear seat air conditioning unit 10 of the present embodiment is disposed on the right side of the vehicle.

The rear seat air conditioning unit 10 is disposed between the outer plate 2 and the quarter trim 3, as shown in FIG. The outer plate 2 is located outside on the right side of the vehicle. The quarter trim 3 is disposed on the rear side of the rear seat 1b in the vehicle interior and is an inner wall of the vehicle interior.

The rear seat air conditioning unit 10 includes a casing 20, a blower 30, and an evaporator 40.

The casing 20 forms an outer shell of the air conditioning unit for the rear seat and forms an air flow path through which air blown toward the rear seat flows. The casing 20 is formed of a resin (for example, polypropylene) having a certain degree of elasticity and excellent in strength.

An inlet 21 for introducing the air blown from the blower 30 is formed in the uppermost part of the air flow path formed in the casing 20 on the front side of the casing 20. The introduction port 21 opens to the front side.

A blowout opening 22 is provided on the rear side of the casing 20. The blowout opening 22 is connected to a plurality of blowout ports through a duct (not shown). The plurality of outlets are respectively opened in the rear seat side space 4 of the vehicle interior.

The blower 30 is a centrifugal multiblade fan including an electric motor 31, an impeller 32, and a scroll case 33.

The electric motor 31 is disposed on the front side of the casing 20. The electric motor 31 rotates the impeller 32 by its rotating shaft. The rotating shaft of the electric motor 31 extends in the left-right direction.

The impeller 32 is a centrifugal fan, and is arranged on the right side of the electric motor 31 on the front side of the inlet 21 of the casing 20.

The impeller 32 is fixed to the rotating shaft of the electric motor 22. The impeller 32 sucks air through the inside air introduction port 34 and blows it outward in the radial direction. The inside air inlet 34 is open on the right side. The scroll case 33 is disposed on the outer side in the radial direction with the rotation axis as the center with respect to the impeller 32. The scroll case 33 collects air blown from the impeller 32 and blows it rearward with respect to the inlet 21 of the casing 20.

The evaporator 40 is disposed in the casing 20 on the air flow downstream side of the blower 30 and on the air flow upstream side of the blowout opening 22. The evaporator 40 is supported by the right wall part 23a and the left wall part 23b of the casing 20 from the surface direction.

The right wall portion 23 a constitutes the right wall of the casing 20 and is formed along the side wall of the evaporator 40. The left wall portion 23 b constitutes the left wall of the casing 20 and is formed along the side wall of the evaporator 40.

The evaporator 40 is one of the devices constituting a well-known vapor compression refrigeration cycle (not shown), and evaporates the low-pressure refrigerant in the refrigeration cycle to exert its endothermic effect. It is a heat exchanger for cooling which cools the air blown to.

The evaporator 40 is configured 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 direction. 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. Thereby, the evaporator 40 cools air with a refrigerant | coolant by allowing air to pass through in the thickness direction.

In this embodiment, the evaporator 40 is arranged so that the air outflow surface 40a faces the left side. That is, the evaporator 40 is arranged so that the air outflow surface 40a faces the passenger compartment side. Here, the fact that the air outflow surface 40a faces in the left-right direction is not limited to the air outflow surface 40a being perpendicular to the left-right direction. For example, as shown in FIG. 4, the angle θ formed by the air outflow surface 40a of the evaporator 40 in the clockwise direction with respect to the left-right direction is within a range of 45 ° <θ <135 °. In the present embodiment, the air outflow surface 40a is inclined by about 45 ° with respect to the left-right direction. The air outflow surface 40a is a heat radiating surface formed on the air downstream side in the thickness direction of the evaporator 40.

In the present embodiment, the cross-sectional area of the air flow path is constant in the region between the blower 30 and the evaporator 40 in the casing 20. More specifically, between the blower 30 and the evaporator 40, as shown in FIG. 3, the right side wall 24a and the left side wall 24b constituting the casing 20 are parallel to each other. Between the blower 30 and the evaporator 40, the upper wall 24c and the lower wall 24d constituting the casing 20 are parallel to each other.

The right side wall 24a constitutes the right wall of the casing 20, and is disposed between the right wall portion 23a and the blower 30. The left side wall 24 b constitutes the left wall of the casing 20 and is disposed between the left side wall 23 b and the blower 30.

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

The electric motor 31 of the blower 30 rotates the impeller 32. Along with this, air flows from the inside air introduction port 34 to the one side in the axial direction with respect to the impeller 32, and the air thus blown out is blown into the introduction port 21 of the casing 20 through the scroll case 33. The blown air passes through the evaporator 40 in the thickness direction. At this time, the air is heated or cooled by the refrigerant in the plurality of tubes. The heated or cooled air flows from the blowout opening 22 through the duct to the plurality of blowout openings, and is blown out from the plurality of blowout openings to the rear seat side space 4.

According to the present embodiment described above, the rear seat air conditioning unit 10 includes the casing 20. The casing 20 is provided between the quarter trim 3 and the outer outer plate 2 on the right side of the vehicle on the rear side with respect to the rear seat 1b side in the vehicle interior, and air is supplied to the rear seat side of the vehicle interior. Shed. The evaporator 40 is arrange | positioned in the casing 20, and heats or cools the air which passes the thickness direction with a refrigerant | coolant. The evaporator 40 is formed in a thin flat shape in the thickness direction through which air passes. The evaporator 40 is located on the air downstream side of the evaporator 40 in the thickness direction, and has an air outflow surface 40a facing the left side.

In the rear seat air conditioning unit 10 according to the comparative example shown in FIGS. 5 and 6, the evaporator 40 is arranged so that the air outflow surface 40 a faces the front-rear direction and the vertical direction.

In contrast, in the present embodiment, as described above, the evaporator 40 is arranged so that the air outflow surface 40a faces the left side. Therefore, the dimension in the left-right direction of the casing 20 can be reduced while the shape of the evaporator 40 viewed from the thickness direction is brought close to a square. For this reason, the dimension of the left-right direction of the air conditioning unit 10 for backseats can be made small, maintaining the performance as a heat exchanger in the evaporator 40 favorably.

As shown in FIG. 5, the rear seat air conditioning unit 10 according to the comparative example connects the evaporator 40 and the refrigerant pipe R when the evaporator 40 is disposed so as to have the air outflow surface 40a in the front-rear direction. It is necessary to provide the piping processing space 41 to be provided outside the evaporator 40 in the left-right direction. For this reason, the dimension of the left-right direction of the air conditioning unit 10 for rear seats will become large.

In contrast, in the present embodiment, as described above, the evaporator 40 is arranged so that the air outflow surface 40a faces the left side. For this reason, the piping processing space 41 which connects the evaporator 40 and the refrigerant | coolant piping R can be provided in the outer side of the evaporator 40 in the advancing direction. For this reason, the dimension of the left-right direction of the air conditioning unit 10 for rear seats can be made still smaller.

In the present embodiment, the cross-sectional area of the air flow path between the blower 30 and the evaporator 40 is constant in the casing 20. For this reason, the pressure loss at the time of air flowing into the evaporator 40 from the air blower 30 can be made small.
(Second Embodiment)
In the second embodiment, an example in which a heater core is added to the rear seat air conditioning unit 10 of the first embodiment will be described.

FIG. 7 shows a view of the rear seat air conditioning unit 10A according to the present embodiment as viewed from above.

The rear seat air conditioning unit 10A includes a casing 20A, a blower 30, an evaporator 40, a heater core 50, and an air mix door 60. In FIG. 7, the same reference numerals as those in FIG. 2 denote the same components, and the description thereof will be simplified.

The casing 20A includes an upper wall (not shown), a lower wall (not shown), a right side wall 25, and a left side wall 26. The right wall 25 includes right wall portions 25a, 25b, 25c, and 25d. The left side wall 26 includes left wall portions 26a, 26b, and 26c.

The right wall portion 25a is formed on the rear side of the introduction port 21 in parallel with the traveling direction. The right wall portion 25b is disposed along the side wall of the evaporator 40 on the rear side of the right wall portion 25a. The right wall portion 25c is disposed in parallel to the air outflow surface 40a of the evaporator 40 on the rear side of the right wall portion 25a. The right wall portion 25d is disposed in parallel to the traveling direction on the rear side of the right wall portion 25b.

The left wall portion 26 a is arranged along the side wall of the evaporator 40 on the rear side of the introduction port 21. The left wall portion 26b is disposed in parallel to the traveling direction on the rear side of the left wall portion 26a. The left wall portion 26c is disposed in parallel to the air outflow surface 40a of the evaporator 40 on the rear side of the left wall portion 26b.

In this embodiment, the evaporator 40 is disposed so that the air outflow surface 40a faces the left side. For example, in the evaporator 40, the angle θ that the air outflow surface 40a makes clockwise with respect to the left-right direction is in the range of 45 ° <θ <135 °. The evaporator 40 is supported by the right wall portion 25b and the left wall portion 26a.

The heater core 50 is disposed between the right wall portion 25c and the left wall portion 26c. The heater core 50 is disposed on the downstream side of the air flow with respect to the evaporator 40. That is, the heater core 50 and the evaporator 40 are arranged in series in the air flow direction. The heater core 50 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 direction. The first tank diverts warm water flowing from the traveling engine side to each of the plurality of tubes. The second tank collects the hot water flowing out from the plurality of tubes and flows it to the traveling engine side. A heat exchange fin is arrange | positioned at each surface of a several tube, and accelerates | stimulates the heat exchange between warm water and air. The heater core 50 heats air with warm water by allowing air to pass in the thickness direction.

The heater core 50 is arranged so that the air outflow surface 50b faces the left side. In the present embodiment, the heater core 50 is arranged so that the air outflow surface 50b thereof is parallel to the air outflow surface 40a of the evaporator 40. The air outflow surface 50 b is a heat radiating surface located on the air downstream side in the thickness direction of the heater core 50.

A bypass passage 26 is provided between the air inflow surface 50a and the right wall portion 25c. The bypass passage 26 allows the cool air blown from the evaporator 40 to flow around the heater core 50 to the blowout opening 22. An outflow passage 27 is provided between the air outflow surface 50b of the heater core 50 and the left wall portions 26b and 26c.

The air mix door 60 is disposed downstream of the heater core 50 in the air flow direction. The air mix door 60 of the present embodiment is configured by a sliding door that is slidably disposed and is driven by an electric motor 61. The air mix door 60 changes the ratio of the amount of air passing through the bypass passage 26 and the amount of air passing through the outflow passage 27 by changing the ratio between the opening area of the bypass passage 26 and the opening area of the outflow passage 27.

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

The electric motor 31 of the blower 30 rotates the impeller 32. Along with this, air flows from the inside air introduction port 34 to one side in the axial direction with respect to the impeller 32, and this air is blown out into the introduction port 21 of the casing 20 </ b> A through the scroll case 33. The blown air passes through the evaporator 40 in the thickness direction. At this time, the air is cooled by the refrigerant in the plurality of tubes and blown out from the air outflow surface 40a as cold air. Thus, the air introduced from the inside air inlet 34 is dehumidified by the evaporator 40 and blown out from the air outflow surface 40a.

A part of the cold air blown out from the air outflow surface 40a passes through the bypass passage 26 and flows to the blowout opening 22 side. On the other hand, the remaining cold air that does not pass through the bypass passage 26 passes through the heater core 50 in the thickness direction. At this time, the remaining cold air is heated by the hot water in the plurality of tubes when passing through the heater core 50. For this reason, warm air flows from the air outlet surface 50 b of the heater core 50 to the outlet opening 22 side through the outlet passage 27.

Thus, the hot air flowing through the outflow passage 27 and the cold air flowing through the bypass passage 26 are mixed and flow into the blowout opening 22 as conditioned air. For this reason, the conditioned air flows from the outlet opening 22 through the duct to the plurality of outlets, and the conditioned air is blown out from the plurality of outlets to the rear seat side space 4.

According to the present embodiment described above, the rear seat air conditioning unit 10A includes the evaporator 40 in the casing 20A. The evaporator 40 is arranged so that the air outflow surface 40a faces the left side. Therefore, as in the above-described embodiment, the dimension of the casing 20A in the left-right direction can be reduced while the shape of the evaporator 40 viewed from the thickness direction is made close to a square. For this reason, the dimension of the left-right direction of 10 A of rear seat air conditioning units can be made small, maintaining the performance as a heat exchanger favorably in the evaporator 40. FIG.

In the present embodiment, the heater core 50 is disposed on the downstream side of the air flow of the evaporator 40. The heater core 50 is disposed such that the air outflow surface 50b faces the left side. For this reason, similarly to the evaporator 40, the dimension in the left-right direction of the casing 20A can be reduced while the shape of the heater core 50 viewed from the thickness direction is made close to a square. For this reason, the dimension in the left-right direction of the rear seat air conditioning unit 10A can be reduced while maintaining the performance as the heat exchanger in the heater core 50 favorably.

In addition, the evaporator 40 and the heater core 50 are arranged so that the air outflow surfaces 40a and 50b are parallel to each other. For this reason, compared with the case where heater core 50 is arranged so that air outflow surface 50b faces the up-and-down direction and the advancing direction, the size in the left-and-right direction of rear seat air conditioning unit 10A can be made still smaller.
(Third embodiment)
In the second embodiment, the example in which the heater core 50 is disposed on the downstream side of the air flow with respect to the evaporator 40 has been described. In the third embodiment, an example in which the evaporator 40 and the heater core 50 are arranged in parallel in a direction crossing the air flow direction will be described.

FIG. 8 shows a view of the rear seat air conditioning unit 10B of this embodiment as viewed from above.

The rear seat air conditioning unit 10B includes a casing 20B, a blower 30, an evaporator 40, a heater core 50, an air mix door 60, and an electric motor 61. In FIG. 8, the same reference numerals as those in FIG. 7 denote the same components, and the description thereof will be simplified.

The casing 20B is provided instead of the casing 20A of FIG. 7, and includes an upper wall (not shown), a lower wall (not shown), a right side wall 70, and a left side wall 71. The right wall 70 includes right wall portions 70a, 70b, 70c, 70d, and 70e. The right wall portion 70a is disposed on the rear side of the introduction port 21 in parallel with the traveling direction. The right wall part 70b is located on the rear side of the right wall part 70a. The right wall portion 70b is arranged so that the dimension between the right wall portion 70b and the left side wall 71 increases toward the rear side. The right wall portion 70c is disposed in parallel to the traveling direction on the rear side of the right wall portion 70b. The right wall portion 70d is located on the rear side of the right wall portion 70c. The right wall portion 70d is arranged so that the dimension between the right wall portion 70d and the left side wall 71 becomes smaller toward the rear side. The right wall portion 70e and the right wall portion 70d are arranged in parallel to the traveling direction on the rear side of the right wall portion 70c.

The left wall 71 includes left wall portions 71a, 71b, 71c. The left wall portion 71a is disposed on the rear side of the introduction port 21 in parallel with the traveling direction. The left wall 71b is located on the rear side of the left wall 71a. The left wall 71b is arranged such that the dimension between the left wall 71b and the right wall 70 increases toward the rear side. The left wall portion 71c is disposed in parallel to the traveling direction on the rear side of the left wall portion 71b.

The evaporator 40 is arranged so that the air outflow surface 40a faces the left side. The heater core 50 is disposed such that the air outflow surface 50b faces the left side. In the present embodiment, the evaporator 40 and the heater core 50 are arranged in parallel in a direction crossing the air flow direction. The evaporator 40 and the heater core 50 are arranged in a V shape in which the dimension between the air inflow surface 40b and the air inflow surface 50a increases toward the upstream side of the air flow. Here, the phrase “the evaporator 40 and the heater core 50 are arranged in parallel in a direction intersecting the air flow direction” includes a state in which both members are arranged in a direction intersecting the air flow direction. . Therefore, as in this embodiment, the evaporator 40 and the heater core 50 may not be parallel but may be inclined with respect to each other.

An outflow passage 28 is provided between the air outflow surface 40a of the evaporator 40 and the left wall 71c. The outflow passage 28 is a passage through which cool air blown from the evaporator 40 flows toward the blowout opening 22.

An outflow passage 27 is provided between the air outflow surface 50b of the heater core 50 and the right wall portion 70c. The outflow passage 27 is a passage through which warm air blown from the heater core 50 flows toward the blowout opening 22. The air mix door 60 is disposed downstream of the outflow passages 27 and 28 in the air flow direction.

The air mix door 60 is driven by an electric motor 61. The air mix door 60 is slidable in the left-right direction. The air mix door 60 changes the ratio of the opening area of the outflow passage 27 and the opening area of the outflow passage 28 by sliding movement, so that the amount of air passing through the outflow passage 27 and the amount of air passing through the outflow passage 28 are changed. Change the ratio.

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

The blower 30 takes in air through the inside air inlet 34 and blows it out into the inlet 21 of the casing 20B. A part of the blown air passes through the evaporator 40 in the thickness direction. At this time, the air is cooled by the refrigerant in the plurality of tubes and blown out from the air outflow surface 40a as cold air. The cold air flows from the outflow passage 28 toward the blowout opening 22.

On the other hand, the remaining air that does not pass through the evaporator 40 passes through the heater core 50 in the thickness direction. At this time, the remaining air is heated by the hot water when passing through the heater core 50. For this reason, warm air flows from the air outlet surface 50 b of the heater core 50 to the outlet opening 22 side through the outlet passage 27.

Here, the ratio of the amount of air passing through the outflow passage 27 and the amount of air passing through the outflow passage 28 is set by the air mix door 60. For this reason, the air temperature blown out from the blowout opening 22 to the rear seat side space 4 side through the duct and the plurality of blowout openings is set by the air mix door 60.

According to the present embodiment described above, the evaporator 40 of the rear seat air conditioning unit 10B is arranged so that the air outflow surface 40a faces the left side. Therefore, as in the first and second embodiments, the size of the casing 20B in the left-right direction can be reduced while the shape of the evaporator 40 viewed from the thickness direction is brought close to a square. For this reason, the dimension of the left-right direction of air conditioning unit 10B for backseats can be made small, maintaining the performance as a heat exchanger in evaporator 40 favorably.

In the present embodiment, the heater core 50 is arranged so that the air outflow surface 50b faces the right side. Therefore, the same effect as the second embodiment can be obtained.

In particular, in this embodiment, the evaporator 40 and the heater core 50 are arranged in a V shape in which the dimension between the air inflow surface 40b and the air inflow surface 50a increases toward the upstream side of the air flow. For this reason, compared with the case where heater core 50 is arranged so that air outflow surface 50b faces the up-and-down direction and the advancing direction, the size in the left-right direction of rear seat air conditioning unit 10B can be made small.

In the present embodiment, the right side wall 70a and the left side wall 71a constituting the casing 20B are parallel between the blower 30 and the evaporator 40. Between the blower 30 and the evaporator 40, the upper wall and the lower wall 2 constituting the casing 20B are parallel to each other. For this reason, the cross-sectional area of the air flow path is constant in the region between the blower 30 and the evaporator 40. Therefore, the pressure loss when air flows from the blower 30 to the evaporator 40 can be reduced.
(Fourth embodiment)
In the third embodiment, the example in which the evaporator 40 and the heater core 50 are arranged in a V shape has been described. In the fourth embodiment, an example in which the evaporator 40 and the heater core 50 are arranged in parallel to the air flow direction will be described.

FIG. 9 shows a view of the rear seat air conditioning unit 10 </ b> C of this embodiment as viewed from above. The rear seat air conditioning unit 10C includes a casing 20C, a blower 30, an evaporator 40, a heater core 50, an air mix door 60, and an electric motor 61. In FIG. 9, the same reference numerals as those in FIG. 8 denote the same components, and the description thereof will be simplified.

The casing 20C is provided instead of the casing 20B of FIG. 8, and includes an upper wall (not shown), a lower wall (not shown), a right side wall 72, and a left side wall 73.

The right wall 72 includes right wall portions 72a, 72b, and 72c. The right wall portion 72a is disposed on the rear side of the introduction port 21 in parallel with the traveling direction. The right wall portion 72b is located on the rear side of the right wall portion 72a. The dimension between the right wall part 72b and the left side wall 73 becomes smaller toward the rear side. The right wall portion 72c is disposed in parallel to the left-right direction on the rear side of the right wall portion 72b.

The left wall 73 includes left wall portions 73a, 73b, and 73c. The left wall portion 73a is disposed on the rear side of the introduction port 21 in parallel with the traveling direction. The left wall portion 73b is located on the rear side of the left wall portion 73a. The dimension between the left wall part 73b and the right side wall 72 becomes larger toward the rear side. The left wall portion 73c is disposed in parallel to the traveling direction on the rear side of the left wall portion 73b.

The evaporator 40 is arranged so that its air outflow surface 40a is parallel to the traveling direction. The heater core 50 is arranged on the rear side of the evaporator 40 so as to be parallel to the traveling direction. That is, the evaporator 40 and the heater core 50 are arranged in parallel to the air flow direction. Accordingly, each of the air outflow surface 40a and the air outflow surface 50b faces the left side.

An inflow passage 29a is provided between the air inflow surface 40b of the evaporator 40 and the air inflow surface 50a of the heater core 50 and the right wall portions 72a and 72b. The inflow passage 29 a guides the air blown from the blower 30 toward the air inflow surface 40 b of the evaporator 40 and the air inflow surface 50 a of the heater core 50.

An inflow passage 29b is provided between the air outflow surface 40a of the evaporator 40 and the air outflow surface 50b of the heater core 50 and the differential wall portions 73a and 73b. The inflow passage 29b guides the cool air blown from the air outflow surface 40a of the evaporator 40 and the warm air blown out from the air outflow surface 50b of the heater core 50 toward the blowout opening 22 side.

The air mix door 60 and the electric motor 61 are arranged on the left side with respect to the evaporator 40 and the heater core 50. The air mix door 60 is driven by an electric motor 61 and is arranged to be slidable in the traveling direction. The air mix door 60 changes the ratio between the opening area of the air inflow surface 40b of the evaporator 40 and the opening area of the air inflow surface 50a of the heater core 50 by sliding movement. As a result, the ratio between the amount of air passing through the evaporator 40 and the amount of air passing through the heater core 50 is changed.

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

The blower 30 takes in air through the inside air inlet 34 and blows it out into the inlet 21 of the casing 20C. This blown air flows into the inflow passage 29a. Part of the air flowing through the inflow passage 29a passes through the evaporator 40 in the thickness direction. At this time, the air is cooled by the refrigerant in the plurality of tubes and blown out from the air outflow surface 40a as cold air. The cold air flows from the outflow passage 29 b toward the blowout opening 22.

On the other hand, the remaining air that does not flow into the evaporator 40 passes through the heater core 50 in the thickness direction. At this time, the remaining air is heated by hot water. For this reason, warm air flows from the air outflow surface 50b of the heater core 50 to the blowout opening 22 side through the outflow passage 29b.

Here, the ratio of the amount of air passing through the evaporator 40 and the amount of air passing through the heater core 50 is set by the air mix door 60. For this reason, the air temperature blown out from the blowout opening 22 to the rear seat side space 4 side through the duct and the plurality of blowout openings is set by the air mix door 60.

According to this embodiment described above, the evaporator 40 is arranged so that the air outflow surface 40a faces the left side. Therefore, as in the first to third embodiments, the dimension of the casing 20C in the left-right direction can be reduced while the shape of the evaporator 40 viewed from the thickness direction is made close to a square. For this reason, the dimension of the left-right direction of 10 C of rear seat air conditioning units can be made small, maintaining the performance as a heat exchanger favorably in the evaporator 40. FIG.

In the present embodiment, the heater core 50 is arranged so that the air outflow surface 50b faces the left side. Therefore, the same effect as the second embodiment can be obtained.

In particular, in the present embodiment, the heater core 50 is disposed on the rear side of the evaporator 40 so as to be parallel to the traveling direction. For this reason, compared with the case where heater core 50 is arranged so that air outflow surface 50b faces the up-and-down direction and the direction of movement, the size in the left-right direction of rear seat air conditioning unit 10C can be made smaller.

In the present embodiment, the right side wall 72a and the left side wall 73a constituting the casing 20C are parallel between the blower 30 and the evaporator 40. Between the blower 30 and the evaporator 40, the upper wall and the lower wall constituting the casing 20C are parallel to each other. For this reason, the cross-sectional area of the air flow path is constant in the region between the blower 30 and the evaporator 40. Therefore, the pressure loss when air flows from the blower 30 to the evaporator 40 can be reduced.
(Fifth embodiment)
In the said 1st Embodiment, the example which has arrange | positioned the evaporator 40 to the air flow downstream of the air blower 30 was demonstrated. In the fifth embodiment, an example in which the evaporator 40 is disposed on the upstream side of the air flow of the blower 30 will be described.

FIG. 10 shows a view of the rear seat air conditioning unit 10D of this embodiment as viewed from above. The rear seat air conditioning unit 10D includes a casing 20D, a blower 30, and an evaporator 40. 10, the same reference numerals as those in FIG. 2 denote the same components, and the description thereof is simplified.

The casing 20D is provided instead of the casing 20 of FIG. 2, and includes an upper wall (not shown), a lower wall (not shown), a right side wall 74, and a left side wall 75.

The right wall 74 includes right wall portions 74a, 74b, 74c, and 74d. The right wall 74a is disposed on the rear side of the introduction port 21 in parallel with the traveling direction. The right wall portion 74b is disposed in parallel to the thickness direction of the evaporator 40 on the rear side of the right wall portion 74a. The right wall portion 74c is disposed in parallel with the traveling direction on the rear side of the right wall portion 74b. The right wall portion 74d is disposed parallel to the left-right direction on the rear side of the right wall portion 74c.

The left wall 75 includes left wall portions 75a, 75b, and 75c. The left wall portion 75a is disposed on the rear side of the introduction port 21 in parallel with the traveling direction. The left wall portion 75b is disposed in parallel to the thickness direction of the evaporator 40 on the rear side of the left wall portion 75a. The left wall portion 75c is disposed in parallel to the traveling direction on the rear side of the left wall portion 75b.

In this embodiment, the evaporator 40 is disposed so that the air outflow surface 40a faces the right side. The blower 30 is disposed on the air flow downstream side of the evaporator 40. Specifically, the blower 30 is arranged so that the inside air inlet 34 faces the right wall 74c side.

Here, between the evaporator 40 and the blower 30, the right wall portion 74c and the left wall portion 75c are arranged in parallel, and the upper wall (not shown) and the lower wall (not shown) are arranged in parallel. Yes.

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

The blower 30 circulates air from the inlet 21 side toward the outlet opening 22. For this reason, the air sucked into the casing 20 </ b> D from the inlet 21 is cooled by the evaporator 40. As a result, cold air is blown from the evaporator 40. This cold air is taken into the blower 30 through the inside air introduction port 34, flows through the scroll case 33 from the blowout opening 22 to the plurality of blowout ports through the duct, and is blown out from the plurality of blowout ports to the rear seat side space 4. .

According to the present embodiment described above, in the rear seat air conditioning unit 10D, the evaporator 40 is arranged so that the air outflow surface 40a faces the right side. Therefore, the size of the casing 20D in the left-right direction can be reduced while the shape of the evaporator 40 viewed from the thickness direction is made close to a square. For this reason, the dimension of the left-right direction of air conditioning unit 10D for backseats can be made small, maintaining the performance as a heat exchanger favorably in the evaporator 40 similarly to the said 1st Embodiment.

In the present embodiment, the right wall portion 74c and the left wall portion 75c are arranged in parallel between the evaporator 40 and the blower 30, and the upper wall (not shown) and the lower wall (not shown) are parallel. Has been placed. For this reason, the cross-sectional area of the air flow path is constant in the region between the blower 30 and the evaporator 40 in the casing 20D. Thereby, the pressure loss at the time of air flowing into the air blower 30 from the evaporator 40 can be made small.
(Other embodiments)
In the first embodiment, the evaporator 40 is arranged such that the angle θ formed by the air outflow surface 40a of the evaporator 40 in the clockwise direction with respect to the left-right direction is within a range of 45 ° <θ <135 °. Explained. However, the present invention is not limited to this, and the evaporator 40 may be arranged so that the clockwise angle θ is within a range of 0 ° <θ <180 °.

Similarly, in the second embodiment, the heater core 50 is arranged so that the angle θ formed by the air outflow surface 50b of the heater core 50 clockwise with respect to the left-right direction is within the range of 0 ° <θ <180 °. May be.

In the second embodiment, the example in which the evaporator 40 and the heater core 50 arranged on the downstream side of the air flow of the blower 30 are arranged in parallel has been described. However, the evaporator 40 and the heater core 50 arranged on the upstream side of the air flow of the blower 30 may be arranged in parallel.

In the second embodiment, the example in which the heater core 50 is disposed on the air flow downstream side of the evaporator 40 has been described. However, the evaporator 40 may be arranged on the downstream side of the air flow of the heater core 50.

In the third embodiment, the example in which the evaporator 40 and the heater core 50 arranged on the downstream side of the air flow of the blower 30 are arranged in a V shape has been described. However, the evaporator 40 and the heater core 50 arranged on the upstream side of the air flow of the blower 30 may be arranged in a V shape.

In the fourth embodiment, the example in which the evaporator 40 and the heater core 50 arranged on the downstream side of the air flow of the blower 30 are arranged in parallel to the traveling direction has been described. However, the evaporator 40 and the heater core 50 arranged on the upstream side of the air flow of the blower 30 may be arranged in parallel with the traveling direction.

In the fifth embodiment, the example in which the evaporator 40 is arranged on the upstream side of the air flow with respect to the blower 30 has been described. However, the evaporator 40 and the heater core 50 may be disposed on the upstream side of the air flow with respect to the blower 30. In this case, the heater core 50 may be arranged so that the air outflow surface 50b faces in the left-right direction.

The evaporator 40 and the heater core 50 may be arranged side by side in a direction intersecting the air flow direction, and the evaporator 40 and the heater core 50 may be arranged in series in the air flow direction. Furthermore, you may arrange | position the air mix door 60 similarly to FIG. 7 or FIG.

In the above first to fifth embodiments, examples in which the rear seat air conditioning units 10, 10A, 10B, 10C, and 10D are arranged on the right side of the vehicle have been described. However, the rear seat air conditioning units 10, 10A, 10B, 10C, and 10D may be arranged on the left side of the vehicle.

Note that the present disclosure is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist of the present disclosure. Further, the above embodiments are not irrelevant to each other, and can be combined as appropriate unless the combination is clearly impossible.

Claims (9)

An air conditioning unit for a rear seat that is disposed on the rear side in the vehicle traveling direction with respect to the rear seat in the vehicle interior and blows air toward the rear seat side of the vehicle interior,
A casing (20) provided between an inner wall (3) in the vehicle interior in the left-right direction of the vehicle and an outer plate (2) outside the vehicle in the left-right direction to form an air flow path through which the air flows. 20A, 20B, 20C, 20D), and
A heat exchanger (40, 50) disposed in the casing for heating or cooling the air flowing through the air flow path,
The heat exchanger is formed in a thin flat shape in the thickness direction through which the air passes, and air outflow surfaces (40a, 50b) located on the air downstream side of the heat exchanger are arranged in the left-right direction of the vehicle. A rear-seat air conditioning unit in which the heat exchanger is arranged to face. An air conditioning unit for a rear seat that is arranged on the rear side in the vehicle traveling direction with respect to the front seat in the vehicle interior and blows air toward the rear seat side of the vehicle interior,
A casing (20) provided between an inner wall (3) in the vehicle interior in the left-right direction of the vehicle and an outer plate (2) outside the vehicle in the left-right direction to form an air flow path through which the air flows. 20A, 20B, 20C, 20D), and
A heat exchanger (40, 50) disposed in the casing for heating or cooling the air flowing through the air flow path,
The heat exchanger is formed in a thin flat shape in the thickness direction through which the air passes, and the heat exchanger is arranged so that the air outflow surface (40a, 50b) of the heat exchanger faces the left-right direction. The rear seat air conditioning unit. A heating heat exchanger (50) as the heat exchanger for heating the air;
A cooling heat exchanger (40) as the heat exchanger for cooling the air,
The rear seat air conditioning unit according to claim 1 or 2, wherein the heating heat exchanger and the cooling heat exchanger are arranged in a direction crossing the air flow direction. The rear seat air conditioning unit according to claim 3, further comprising an air mix door (60) for changing a ratio of an amount of air passing through the heating heat exchanger and an amount of air passing through the cooling heat exchanger. A heating heat exchanger (50) as the heat exchanger for heating the air;
A cooling heat exchanger (40) as the heat exchanger for cooling the air,
The rear seat air conditioning unit according to claim 1 or 2, wherein the cooling heat exchanger and the heating heat exchanger are arranged in series in the air flow direction. A bypass passage (26) formed in the casing, through which the air passing through the cooling heat exchanger bypassing the heating heat exchanger flows;
The rear seat air conditioning unit according to claim 5, further comprising an air mix door (60) that changes a ratio of an amount of air passing through the heat exchanger for heating and an amount of air passing through the bypass passage. The rear seat air conditioning unit according to any one of claims 1 to 6, further comprising a blower (30) disposed downstream of the heat exchanger in the air flow direction to distribute the air. The rear-seat air conditioning unit according to any one of claims 1 to 6, further comprising a blower (30) that is arranged upstream of the heat exchanger in the air flow direction and distributes the air. The rear seat air conditioning unit according to any one of claims 1 to 8, wherein the casing has a constant cross-sectional area of the air flow path between the heat exchanger and the blower.

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