JP2011195078A - Vehicle air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle air conditioner reducing thermal loss of air-conditioning air when the air-conditioning air is transported from the lower part to the upper part of a vehicle.SOLUTION: A pipe section 3 is disposed upward and downward in a seat 12, and the pipe section 3 is connected to a Peltier element 2. A headrest ventilation opening 322 is faced upward on the upper surface of a headrest 121. A ceiling 14 of the vehicle includes a ceiling pipe section 4 allowing air to pass therethrough. A first ceiling ventilation section 41 made up of a plurality of ceiling openings 411 is formed at a position located above the headrest ventilation opening 322 and corresponding to the headrest ventilation opening 322 in the ceiling pipe section 4. A second ceiling ventilation section 42 for blowing out air is formed closer to the front of the vehicle than the first ceiling ventilation section 41 of the vehicle in the ceiling pipe section 4. The headrest ventilation opening 322 and the first ceiling ventilation section 41 are spaced apart.

Description

  The present invention relates to a vehicle air conditioner.

  Patent Document 1 discloses a vehicle in which a Peltier element is installed under the floor. The heat absorption fins of the Peltier element are provided from the floor of the vehicle body toward the bottom of the vehicle body, and a heat radiating plate fixed to the Peltier element is disposed at the foot of the passenger.

  Patent Document 2 discloses an air curtain device that blows air forming an air curtain between a front seat side space and a rear seat side space of a passenger compartment, and air from the vehicle front side toward the front seat side space. A vehicle air conditioner including a front seat air conditioning unit that blows air and a rear seat air conditioning unit that blows air from the side of the vehicle toward the space on the rear seat side is disclosed. The rear seat air conditioning unit is disposed on the side surface of the vehicle. A face duct (216) connected to the rear seat air conditioning unit extends from the rear seat air conditioning unit to the ceiling side. Air is blown from the rear seat air conditioning unit through the face duct to the rear seat space.

JP-A-8-11517 JP 2002-362128 A

  In the vehicle air conditioner as in Patent Document 1, the heat of the Peltier element is dissipated (heat absorbed) by the fins arranged toward the outside of the vehicle, and the feet of the passenger can be warmed (cooled). However, since heat is not transported upward in the passenger compartment, it is not possible to heat (cool) the portions other than the feet of the occupant seated in the seat.

  In the case of transporting air to the ceiling side by circulating a duct arranged on the side surface of the vehicle as in Patent Document 2, heat (hot or cold) is transferred to the outside of the passenger compartment in the process of air circulating through the duct. There is a problem of being easily leaked.

  An object of the present invention is to provide a vehicle air conditioner capable of reducing heat loss of conditioned air when conditioned air is transported from below to above the vehicle.

  The present invention according to claim 1 includes a first air circulation means that extends in the vertical direction at least in a vehicle seat and is capable of circulating air, a heat supply section connected to the first air circulation means, A second air circulation means provided on a ceiling of the vehicle and capable of circulating air; a first ventilation port through which air can be blown into the vehicle interior from the first air circulation means; and the vehicle interior in the second air circulation means. An air conditioner for a vehicle having a second ventilation port from which air can be taken in, and a third ventilation port from which air can be blown into the vehicle interior from the second air circulation means, wherein the first ventilation port is: It is installed so as to have an opening direction at a position above the first air circulation means and corresponding to the second ventilation opening, and the second ventilation opening corresponds to the lower side from the ceiling and at least the first ventilation opening. Set to have an opening direction at the position. Is characterized in that said first vent and the second vent hole are spaced apart.

  Further, the fact that the first ventilation port and the second ventilation port are spaced apart from each other means that the air blown from the first ventilation port can be sucked from the second ventilation port. And a case where a part of the air blown out from the first ventilation port spreads into the vehicle interior without being sucked from the second ventilation port.

  In addition, the second vent is located at a position below the ceiling and at least in a position corresponding to the first vent, so that at least the second vent is in a region corresponding to the first vent. This is the case where the second vent is provided so as to be located, where the second vent is formed in an area sufficiently larger than the first vent, and the position and angle of the first vent are changed. This also includes the case where the air blown from the first ventilation port can be sucked from the second ventilation port.

  Therefore, according to the first aspect of the present invention, the air heated or cooled by the heat supply section passes through the interior of the seat and is distributed to the second air circulation means. Therefore, when air is transported from the lower side to the upper side of the vehicle, heat loss due to the heat of the air flowing out of the passenger compartment can be reduced.

  The present invention according to claim 2 is characterized in that the heat supply section is provided on a floor of a vehicle.

  The phrase “provided on the floor” refers to a case where it is provided below the floor and a case where it is provided on the upper surface of the floor, and includes a case where it is provided in contact with the floor inside the seat.

Therefore, it is suitable for the present invention which transports conditioned air from the bottom to the top of the vehicle.

  According to a third aspect of the present invention, the seat is a seat whose position or angle is adjustable, and the second ventilation opening is adjusted to have an opening direction at a position corresponding to the first ventilation opening. Characterized by

  Note that the second vent can be adjusted to have an opening direction at a position corresponding to the first vent, which means that the first vent with respect to the second vent is changed by changing the position or angle of the seat. Even if the position of the second vent is adjusted, the second vent is disposed in the region corresponding to the first vent above the first vent, and the air blown from the first vent is the second vent. This includes a case where the position of the second ventilation port on the ceiling is adjusted so that the second ventilation port is positioned at a position corresponding to the first ventilation port.

  Therefore, even when the position or angle of the seat is adjusted, air is circulated from the lower side to the upper side of the vehicle without requiring a separate member for connecting the first air circulation means and the first air circulation means. be able to.

  The present invention described in claim 4 is characterized in that the first ventilation hole is provided on an upper surface of a headrest of the seat.

  Accordingly, since the first air circulation means is not provided above the upper surface of the seat, the occupant's visibility is improved.

  According to a fifth aspect of the present invention, there is provided switching means capable of switching a state in which air is sucked or blown from the third ventilation opening between cooling and heating.

  Therefore, by switching the airflow of the air to the occupant, the decrease in the sensible temperature due to the airflow can be used for air conditioning, and the air conditioning efficiency is improved.

  The present invention according to claim 6 is characterized in that a direct injection portion capable of blowing out air is formed on a surface of the seat that comes into contact with an occupant seated on the seat.

  Therefore, air can be directly blown out to the occupant seated in the seat, and the efficiency of cooling or heating can be improved.

  The present invention according to claim 7 is characterized in that the direct injection part includes a check valve capable of ventilating in the air blowing direction of the direct injection part.

  Therefore, the air blowing state from the direct injection portion can be switched depending on the pressure difference or the air flow direction without providing a control device, and the number of parts can be reduced.

  The present invention according to claim 8 is characterized in that the heat supply unit is a Peltier element.

  Therefore, since one heat supply part can be utilized as a cold heat supply part and a heat supply part, the number of parts can be reduced.

  The present invention can reduce heat loss of conditioned air when conditioned air is transported from below to above the vehicle.

It is a mimetic diagram explaining the flow of the air at the time of air conditioning in vehicular air conditioner 1 of an embodiment. It is a schematic diagram explaining the structure which looked at the ceiling piping part 4 in the vehicle air conditioner 1 of embodiment from the vehicle interior side. It is a schematic diagram explaining the flow of the air at the time of heating in the vehicle air conditioner 1 of embodiment.

(Embodiment)
The embodiment will be described with reference to FIGS. 1 to 3. For convenience of illustration, some dimensions are exaggerated for easy understanding.

First, the structure of the vehicle air conditioner 1 of this embodiment is demonstrated.
As shown in FIG. 1, the vehicle air conditioner 1 includes a Peltier element 2 as a heat supply unit disposed on a floor 11 of the vehicle, a first fin 21 provided in thermal connection with the Peltier element 2, and a first fin 21. 2 fins 22, a piping part 3 as a first air circulation means provided inside the seat 12, and a ceiling piping part 4 as a second air circulation means provided on the ceiling 14.
In the present embodiment, the seat 12 is configured such that the position of the seat 12 and the angle of the headrest 121 or the backrest 122 can be adjusted.

The Peltier element 2 is disposed on the upper surface of the floor 11. A first fin 21 is disposed on the lower surface of the Peltier element 2 so as to contact the Peltier element 2.
The first fin 21 is connected to an underfloor outside air introduction section 5 that can circulate outside air that is outside the vehicle. The underfloor outside air introduction part 5 is provided with an outside air inlet 51 through which a position where outside air flows is opened below the floor 11 and on the front side of the vehicle (left side in FIG. 1). In addition, an outdoor air discharge port 52 that is open so that air can be discharged to the outside of the vehicle is provided on the rear side (right side in FIG. 1) of the underfloor outside air introduction unit 5.
On the upper surface of the Peltier element 2, the second fin 22 is disposed in contact with the Peltier element 2, and the second fin 22 is configured to be located inside the pipe portion 3.

In the piping part 3, a foot piping part 6 is connected to the piping part 3 at a position corresponding to the vicinity of the feet of an occupant seated on the seat 12 on the lower front side of the vehicle (lower left side in FIG. 1). In the foot piping section 6, a foot ventilation opening 61 that is open to allow air to flow is formed on the side that is located on the front side of the vehicle and is not connected to the piping section 3.
The piping unit 3 includes a first path unit 31, a second path unit 32, a third path unit 33, and a fourth path unit 34.

  The first path portion 31 extends from the place connected to the foot piping portion 6 in the vehicle front-rear direction (left-right direction in FIG. 1). Further, below the seating portion 123 of the seat 12, in the first path portion 31, from the end of the side that is not connected to the foot piping portion 6 (right side in FIG. 1), the vehicle vertical direction (vertical direction in FIG. 1). A second path portion 32 is extended. In the present embodiment, the third path portion 33 is provided above the first path portion 31 in parallel with the first path portion 31, and is connected to the second path portion 32 at the branch point P. One end (the front side of the vehicle, the left side in FIG. 1) of the third piping portion is connected to a fourth path portion 34 extending in the vertical direction of the vehicle below the third path portion 33. The fourth path portion 34 is connected to the first path portion 31 and the foot piping portion 6.

  In the second path portion 32, the upper side of the branch point P is configured as a backrest piping portion 321. The backrest piping part 321 extends from the branch point P to the upper surface part of the headrest 121 that is the upper part of the seat, and is opened on the upper surface of the headrest 121. Air can flow through the opened portion of the backrest piping portion 321 and constitutes a headrest ventilation port 322.

There is a gap between the headrest 121 and the ceiling 14, and the headrest ventilation port 322 and a first ceiling ventilation unit 41 described later are disposed apart from each other.
In the second path portion 32, a first fan 7 that can blow air by rotation of the wings is installed below the branch point P. In addition, the 1st fan 7 becomes a structure which can switch the rotation direction of a wing | blade.

In the backrest piping section 321, a backrest direct injection section 323 that is open so that air can be blown out is formed on the back side of the occupant seated in the seat 12 (the surface side of the seat 12, the left side in FIG. 1). A backrest direct injection valve 324 (illustrated in FIG. 3), which is a check valve, is fixed to the backrest direct injection section 323 so as to be openable and closable. The backrest direct injection valve 324 is configured to be switchable so as to be opened during cooling and closed during heating due to the pressure difference of the back piping 321.
Further, in the third path portion 33, a seating portion direct injection portion 333 that is open so that air can be blown out is formed on the buttock side of the occupant seated on the seat 12 (surface side of the seat 12, upper side in FIG. 1). ing.

In the 3rd channel | path part 33, the 1st seat part valve | bulb 36 is being fixed between the seat part direct injection part 333 and the branch point P so that opening and closing is possible. Moreover, in the 3rd path | route part 33, the 2nd seat part valve | bulb 37 is fixed so that opening and closing is possible between the location connected with the 4th path | route part 34, and the seat part direct injection part 333. FIG.
Each of the first seating part valve 36 and the second seating part valve 37 is a check valve that can be driven by a pressure difference, and is configured to be able to switch between opening and closing of the third path part 33.

The ceiling piping unit 4 is configured to be disposed above the seat 12 on the ceiling 14 of the vehicle. In the ceiling piping part 4, a first ceiling ventilation part 41 that is configured to allow air to flow is formed above the seat 12 (part corresponding to the headrest ventilation opening 322). The first ceiling ventilation part 41 corresponds to the second ventilation opening.
That is, the headrest ventilation port 322 is installed so as to have an opening direction at a position above the backrest piping unit 321 and corresponding to the first ceiling ventilation unit 41, and the first ceiling ventilation port is located below the ceiling 14 and It is installed so as to have an opening direction at least at a position corresponding to the headrest ventilation port 322.

  FIG. 2 is a schematic view of the ceiling piping section 4 as viewed from the lower side (vehicle interior). The first ceiling ventilation portion 41 is provided with a plurality of ceiling openings 411 that are opened in a slit shape in parallel with the vehicle front-rear direction (vertical direction in FIG. 2). In this embodiment, a shutter member (not shown) that can open and close the ceiling opening 411 is provided. The shutter member can selectively open and close at least a part of the ceiling opening 411 by a control device (not shown), and the first ceiling ventilation portion 41 is adjusted to have an opening direction at a position corresponding to the headrest ventilation port 322. Is possible. That is, even when the position or angle of the seat 12 is changed and the position of the headrest ventilation port 322 with respect to the ceiling piping unit 4 is changed, the ceiling opening 411 disposed above the headrest ventilation port 322 is provided. It is controlled to be in an open state. In the present embodiment, control is performed so that the ceiling opening 411 positioned directly above the headrest ventilation opening 322 is in an open state, and the ceiling opening 411 not positioned directly above the headrest ventilation opening 322 is closed. It becomes the composition which is done.

  In addition, a second ceiling ventilation portion 42 that can circulate air toward the vehicle interior is formed on the front side (lower side in FIG. 2) of the vehicle in the ceiling piping portion 4. In this embodiment, the 2nd ceiling ventilation part 42 respond | corresponds to a 3rd ventilation opening, and becomes a structure which can blow off air to the upper body of the passenger | crew who seated on the seat 12. FIG.

  In the ceiling piping part 4, the second fan 8 is installed above the second ceiling ventilation part 42 (upward in FIG. 1). The second fan 8 is configured to be able to blow air by rotating the wings and to switch the rotation direction of the wings. In this embodiment, the second fan 8 corresponds to switching means. The second fan 8 is switched by control means (not shown) so as to rotate during cooling and stop during heating. That is, the blowing state of the air from the second ceiling ventilation portion 42 is configured to be switched so that it is blown out during cooling and is not blown out during heating.

Next, the air flow during cooling in the vehicle air conditioner 1 of the present embodiment will be described.
In addition, in FIG. 1, the arrow has shown the direction through which air flows.

  The heat of the outside air circulated through the underfloor outside air introduction unit 5 is transferred to the Peltier element 2 by the first fins 21. The cold heat of the Peltier element 2 cools the air flowing through the piping part 3 (first path part 31) by the second fins 22. The cooled air (cold air) is circulated (blowed) from the first path portion 31 toward the second path portion 32 by the rotation of the first fan 7. The direction of the cool air blown is branched at the branch point P to the third path portion 33 and the backrest piping portion 321, and is circulated in the direction of the arrow at the third path portion 33 and the backrest piping portion 321.

  During cooling, the first seating part valve 36 is opened and the second seating part valve 37 is closed. That is, the first seating section valve 36 is opened and the second seating section valve 37 is closed due to the pressure difference in the third path section 33. The cool air circulated through the third path portion 33 is circulated from the seating portion direct injection portion 333 to the surface side of the seat 12. Further, the third passage portion 33 is closed by the second seat portion valve 37, so that the cool air is not circulated from the third passage portion 33 to the fourth passage portion 34. Further, when the second seat valve 37 is closed, the air flowing from the foot vent 61 to the first path portion 31 through the foot piping section 6 passes through the fourth path portion 34 to the third path portion. 33 is not distributed.

As shown in FIG. 1, the backrest direct injection part valve 324 is opened during cooling, and the cool air circulated through the backrest pipe part 321 is blown out from the backrest direct injection part 323 toward the surface of the seat 12.
That is, when an occupant is seated on the seat 12, cold air is blown directly from the backrest direct injection part 323 or the seating part direct injection part 333 toward the head, back, legs, or buttocks of the occupant.
Further, the cold air circulated through the backrest piping section 321 is blown upward from the headrest ventilation port 322.

The cold air blown out from the headrest ventilation port 322 is circulated from the first ceiling ventilation unit 41 to the ceiling piping unit 4. During cooling, the second fan 8 is rotated so as to suck air from the first ceiling ventilation part 41 and blow it out from the second ceiling ventilation part 42. Due to the rotation of the second fan 8, the cold air is sucked from the first ceiling ventilation part 41 and blown out from the second ceiling ventilation part 42. The cool air is blown out from the second ceiling ventilation portion 42 toward the seat 12.
That is, when an occupant sits on the seat 12, the cold air is blown out from the second ceiling ventilation portion 42 toward the occupant.

Next, the flow of air during heating in the vehicle air conditioner 1 of the present embodiment will be described.
In FIG. 3, the arrows indicate the direction of air flow.

During heating, the rotation direction of the first fan 7 is switched to the opposite direction to that during cooling. By the rotation of the first fan 7, warm air (warm air) staying near the ceiling of the vehicle is sucked from the headrest ventilation port 322.
A backrest direct injection portion 323 valve fixed to the backrest direct injection portion 323 so as to be openable and closable is switched by a control device (not shown) to be closed during heating. The air that has flowed into the backrest piping part 321 is not blown out from the backrest direct injection part 323 by closing the backrest direct injection part valve 324, and passes downward through the second path part 32 (backrest piping part 321). It is distributed toward. During heating, the first seating section valve 36 is closed, and the second seating section valve 37 is switched by a control device (not shown) so as to be opened.

  The air circulated through the second path part 32 is circulated through the first path part 31. The heat of the outside air introduced from the underfloor outside air introduction part 5 is transferred to the Peltier element 2 by the first fin 21, and the heat of the Peltier element 2 is transferred to the air of the first path part 31 by the second fin 22. That is, when the outside air is cold, the air in the first path portion 31 is heated by the Peltier element 2 and becomes warm air. Warm air is blown out from the foot vent 61 of the foot piping portion 6 via the first path portion 31. That is, when an occupant is seated on the seat 12, warm air is blown out from the foot vent 61 to the feet of the occupant.

  Further, the warm air circulated from the first path part 31 and circulated upward through the fourth path part 34 is circulated to the third path part 33 because the second seating part valve 37 is opened. The warm air circulated through the third path portion 33 is blown out from the seating portion direct injection portion 333 to the surface of the seat 12. That is, when an occupant is seated on the seat 12, warm air is directly blown out to the occupant's legs or buttocks.

Next, the operation in this embodiment will be described.
In the piping part 3, the second path part 32 (backrest piping part 321) extends in the vertical direction (the direction from the floor 11 toward the ceiling 14, the vertical direction in FIG. 1) inside the seat 12. The piping part 3 is connected to the Peltier element 2 in the first path part 31. In addition, a headrest ventilation port 322 in which the pipe portion 3 is opened is formed on the upper surface of the headrest 121 so as to face upward.

The ceiling 14 of the vehicle is provided with a ceiling piping section 4 through which air can flow. In the ceiling piping part 4, a first ceiling ventilation part 41 including a plurality of ceiling openings 411 is formed above the headrest ventilation hole 322 and at a position corresponding to the headrest ventilation hole 322. Moreover, in the ceiling piping part 4, the 2nd ceiling ventilation part 42 which can blow off air is formed in the front (left side in FIG. 1) of the vehicle from the 1st ceiling ventilation part 41 of a vehicle.
The headrest ventilation opening 322 and the first ceiling ventilation section 41 are arranged apart from each other.

  The air cooled by the Peltier element 2 passes through the backrest piping portion 321 provided inside the seat 12 and is blown from the headrest ventilation port 322, and then flows from the first ceiling ventilation portion 41 to the ceiling piping portion 4. Is done. Therefore, when the air cooled by the Peltier element 2 provided on the upper surface of the vehicle floor 11 (below the vehicle) is transported to the ceiling 14 side (upward), the air is circulated inside the seat 12. Therefore, it is difficult for the heat of air to flow out of the passenger compartment. Therefore, heat loss in air conditioning can be reduced.

  The position or angle of the seat 12 can be adjusted. The ceiling piping unit 4 is provided with a shutter member that can adjust the open / close state of the first ceiling opening 411 in conjunction with the position or angle of the seat 12. The shutter member is controlled such that the ceiling opening 411 disposed above the headrest ventilation port 322 is opened when the position of the headrest ventilation port 322 with respect to the ceiling piping unit 4 changes. With the shutter member, the first ceiling portion is opened and closed such that the ceiling opening 411 positioned directly above the headrest ventilation port 322 is opened and the ceiling opening 411 not positioned directly above the headrest ventilation port 322 is closed. Be controlled.

There is a gap between the headrest vent 322 and the first ceiling vent 41. That is, a space is formed between the backrest piping part 321 (headrest ventilation port 322) and the ceiling piping part 4 (first ceiling ventilation part 41). When air flows from the lower side to the upper side in the space, the back pipe part 321 and the ceiling pipe part 4 may be connected by another member such as a duct. However, when air is circulated through the separate member, the seat 12 is connected to the ceiling 14 by a separate member, so the position or angle of the seat 12 cannot be changed. That is, there is a problem that the degree of freedom of the position or angle of the seat 12 is limited.
On the other hand, a headrest ventilation port 322 and a first ceiling ventilation unit 41 are provided, and air is circulated from the backrest piping unit 321 to the ceiling piping unit 4 through the space between the headrest ventilation port 322 and the first ceiling ventilation unit 41. In such a case, the degree of freedom of the position or angle of the seat 12 is not limited. That is, even when the position or angle of the seat 12 is adjusted, air can be circulated from the lower side of the vehicle (the vehicle floor 11) to the upper side (the ceiling).

  The headrest ventilation opening 322 is provided on the upper surface of the headrest 121 of the seat 12. That is, the backrest piping part 321 is not provided above the upper surface of the headrest 121. Therefore, since a member that blocks the occupant's field of view is not provided between the headrest 121 and the ceiling 14, the occupant's field of view is improved.

  The second ceiling ventilation portion 42 is configured to be able to blow out air to the upper body of the occupant seated on the seat 12. The second fan 8 is switched by the control means so as to rotate during cooling and to stop rotating during heating. That is, the air blowing state from the second ceiling ventilation unit 42 is switched so that air is blown out from the second ceiling ventilation unit 42 during cooling, and air is not blown out from the second ceiling ventilation unit 42 during heating.

  Therefore, the temperature of the occupant can be reduced by blowing air directly to the occupant during cooling. On the other hand, at the time of heating, by adjusting so that air is not blown directly to the occupant, it is possible to prevent a decrease in the sensible temperature of the occupant. That is, by switching the airflow of air to the occupant between cooling and heating, a change in the temperature of the sensation due to the airflow can be used for air conditioning, and air conditioning efficiency is improved.

  Warm air staying on the ceiling of the vehicle is blown out from the foot vent 61 to the feet of the occupant through the back piping 321. Therefore, warm air near the ceiling can be used for heating. Moreover, the passenger | crew's discomfort resulting from warming a passenger | crew's head at the time of heating can be suppressed, and an air-conditioning load can be reduced.

The seat 12 is formed with a backrest direct injection portion 323 and a seating portion direct injection portion 333 that can blow out air on the surface (the backrest portion 122, the surface of the seating portion 123) that comes into contact with an occupant seated in the seat 12. ing.
Since air can be blown directly to the head, back, legs or buttocks of the occupant seated on the seat 12, the sensible temperature of the occupant can be lowered. Therefore, the cooling efficiency can be improved during cooling.

  A Peltier element 2 as a heat supply unit is provided on the upper surface of the floor 11. Since the Peltier element 2 can also serve as a cold heat supply unit and a heat supply unit, the number of components may be smaller than when both an evaporator as a cold heat supply unit and a heater as a heat supply unit are installed, for example. . Further, for example, it is not necessary to provide complicated piping as compared with the case where an evaporator is installed.

  In the piping part 3, a foot piping part 6 is connected to the piping part 3 at a position corresponding to the vicinity of the feet of the occupant seated on the seat 12 below the front side of the vehicle. A foot vent 61 is formed on the front side so as to allow air to flow therethrough. The warm air is circulated from the first path portion to the foot piping portion 6 and then blown out from the foot vent 61. As a result, the feet of the passenger can be warmed.

  Cooling air is blown out from the back direct injection part 323 and the seating part direct injection part 333 during cooling, and the air outlet is switched between cooling and heating so that warm air is blown out from the foot vent 61 of the foot piping part 6 during heating. ing. For this reason, by air-conditioning each suitable part at the time of cooling and heating, the sensible temperature can be kept comfortable with a small air conditioning load, and the cooling or heating efficiency is improved.

  A backrest direct injection valve 324, a first seating section valve 36, and a second seating section valve 37, which are check valves capable of switching the blowing of air from the backrest direct injection section 323 or the seating section direct injection section 333, are provided. . Therefore, even if a control device for controlling the open / closed state of the backrest direct injection valve 324, the first seating valve 36, and the second seating valve 37 is not provided, the pressure from the direct injection unit due to the pressure difference of the piping unit 3 can be provided. The air blowing state can be switched, and the number of parts can be reduced.

The above-described embodiment has the following operational effects.
(1) Inside the seat 12, a pipe part 3 (backrest pipe part 321) is provided in the vertical direction, and the pipe part 3 is connected to the Peltier element 2 in the first path part 31. In addition, a headrest ventilation port 322 in which the pipe portion 3 is opened is formed on the upper surface of the headrest 121 so as to face upward. The ceiling 14 of the vehicle is provided with a ceiling piping section 4 through which air can flow. In the ceiling piping part 4, a first ceiling ventilation part 41 including a plurality of ceiling openings 411 is formed above the headrest ventilation hole 322 and at a position corresponding to the headrest ventilation hole 322. Moreover, in the ceiling piping part 4, the 2nd ceiling ventilation part 42 which can blow off air is formed ahead of the vehicle from the 1st ceiling ventilation part 41 of the vehicle. The headrest ventilation opening 322 and the first ceiling ventilation section 41 are arranged apart from each other. Therefore, the air cooled by the Peltier element 2 passes through the interior of the seat 12 and is circulated to the ceiling piping part 4. Therefore, when air is transported from the lower side to the upper side of the vehicle, heat loss due to the heat of the air flowing out of the passenger compartment can be reduced.

(2) The position or angle of the seat 12 can be adjusted, and the first ceiling ventilation portion 41 includes a shutter member that can be adjusted to have an opening direction at a position corresponding to the headrest ventilation port 322.
Therefore, even when the position or angle of the seat 12 is adjusted, air is circulated from the lower side to the upper side of the vehicle without requiring another member for connecting the backrest pipe part 321 and the ceiling pipe part 4. be able to.

(3) The headrest ventilation opening 322 is provided on the upper surface of the headrest 121 of the seat 12. Therefore, since the backrest piping part 321 is not provided above the upper surface of the seat 12, the occupant's field of view is improved.

(4) The ceiling piping part 4 is provided with a switching means capable of switching the state of air suction or blowing from the second ceiling ventilation part 42 between cooling and heating. Therefore, by switching the air flow for the passenger between cooling and heating, the reduction in the temperature of the sensation due to the air flow can be used effectively for air conditioning, thus improving the air conditioning efficiency.

(5) In the seat 12, the backrest direct injection portion 323 and the seating portion direct injection portion 333 that can blow out air are provided on the surfaces (the backrest portion 122 and the surface of the seating portion 123) that come into contact with the occupant seated in the seat 12. Is formed. Therefore, air can be directly blown out to the occupant seated in the seat 12, and the efficiency of cooling or heating is improved.

(6) Since the heat supply unit is the Peltier element 2, one heat supply unit can also serve as the cold supply unit and the warm supply unit. Therefore, the number of parts can be reduced.

(7) In the piping part 3, a foot piping part 6 connected to the piping part 3 is installed at a position corresponding to the vicinity of the feet of the occupant seated on the seat 12 below the front side of the vehicle. In the front side of the vehicle, a foot vent 61 that is open to allow air to flow is formed. As a result, the feet of the passenger can be warmed.

(8) Air is blown out from the back direct injection part 323 and the seating part direct injection part 333 during cooling, and air is blown out during cooling and heating so that warm air is blown out from the foot vent 61 of the foot piping part 6 during heating. The mouth is switched. For this reason, by air-conditioning each suitable part at the time of cooling and heating, the sensible temperature can be kept comfortable with a small air conditioning load, and the cooling or heating efficiency is improved.

(9) A backrest direct injection valve 324, a first seating section valve 36, and a second seating section valve 37, which are check valves capable of switching the blowing of air from the backrest direct injection section or the seating section direct injection section. Yes. Therefore, even if a control device for controlling the open / closed state of the backrest direct injection valve 324, the first seating valve 36, and the second seating valve 37 is not provided, it depends on the pressure difference in the piping 3 or the air flow direction. The blowing state of air from the direct injection part can be switched, and the number of parts can be reduced.

  The present invention is not limited to the configuration of the embodiment described above, and various modifications are possible within the scope of the gist of the present invention, and can be implemented as follows.

  In the embodiment, the headrest vent 322 may be provided with a valve that can be closed during heating. For example, during heating, the headrest vent 322 is closed by the valve, and the first fan 7 is rotated in the same direction as that during cooling, so that air flowing from the foot piping unit 6 is heated by the Peltier element 2. After that, the backrest direct injection part 323 or the seating part direct injection part 333 may be blown out.

  In the embodiment, air may be blown out from the second ceiling vent toward the occupant during heating.

  In the embodiment, the headrest vent 322 as the first vent may not be formed in the headrest 121. For example, it may be formed on the upper surface of the backrest portion 122. Further, the first ventilation opening may not be formed on the upper surface of the seat 12. For example, a part of the backrest piping part 321 is provided above the surface of the seat 12, and a first ventilation opening is provided in which the backrest piping part 321 provided above the surface of the seat 12 is opened. Also good.

  In the embodiment, a part of the air blown out from the second ceiling ventilation part 42 may be sucked from the first ceiling ventilation part 41. In that case, since the air can be circulated in the ceiling piping part 4, the outflow of heat to other than the periphery of the seat 12 in the vehicle interior can be reduced, and the heat loss is reduced.

  In the embodiment, the second ceiling vent is not limited to a configuration capable of blowing air to the upper body of the passenger seated on the seat 12. As long as it is blown out to at least the passenger, for example, it may be blown out to the legs of the passenger. When air is blown out to the upper body or head of the occupant, the sensible temperature of the occupant can be further reduced.

  In the embodiment, another ceiling piping unit 4 having a vent hole that can blow out air to a passenger seated in the rear seat may be installed. Moreover, the ventilation port which can blow off air to the passenger | crew who seated on the back seat may be provided in one ceiling piping part 4 not only in the structure provided with another ceiling piping part 4 for rear seats.

  In the embodiment, the shutter member may not be provided. For example, the first ceiling ventilation part 41 is formed in an area sufficiently wider than the headrest ventilation hole 322, and the air blown from the headrest ventilation hole 322 is always in the ceiling piping part 4 regardless of the position and angle of the seat 12. Any configuration that can be distributed is acceptable. Here, the sufficiently large area means a case where the position or angle of the seat 12 changes, and at least the first ceiling ventilation part 41 is formed in a region corresponding to the position where the headrest ventilation hole 322 is arranged. Point to.

  In the embodiment, the backrest direct injection part 323 or the seating part direct injection part 333 may not be provided. In this case, the back direct injection valve 342, the first seat valve 36, or the second seat valve 37 may not be provided.

  In the embodiment, the rotation direction of the first fan 7 or the second fan 8 may not be switched between cooling and heating. It is sufficient that at least the air heated or cooled by the Peltier element 2 can be circulated from the backrest piping part 321 to the ceiling piping part 4.

  In the embodiment, the heat supply unit may not be the Peltier element 2. For example, a heater or an evaporator may be used.

  In the embodiment, the foot piping unit 6 may not be provided as long as air can be blown out from the second ceiling ventilation unit 42 toward the occupant. Further, the cooling air may be configured to be blown out from the foot vent 61 during cooling. In that case, the feet of the passenger can be cooled.

  In the embodiment, the floor 11 of the vehicle may have a heat storage material as a heat supply unit, and the heat storage material may store cold or warm heat supplied from an air conditioner or the like provided in the engine room.

  In the embodiment, the second ceiling ventilation portion 41 has a shape (for example, a cross section) that can change the air flow direction provided in the area corresponding to the headrest ventilation opening 322 along the ceiling 12 so as to face the front-rear direction of the vehicle. A guide member having an arcuate shape) may be used. In that case, since air is circulated along the guide member, the air blown from the headrest vent 322 can be circulated into the vehicle compartment even when the second fan 8 is not provided.

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 2 Peltier element 3 Piping part 4 Ceiling piping part 7 1st fan 8 2nd fan 11 Floor 12 Seat 14 Ceiling 41 1st ceiling ventilation part 42 2nd ceiling ventilation part 121 Headrest 322 Headrest ventilation opening 323 Straight back Injection unit 333 Seating unit direct injection unit

Claims (8)

First air circulation means extending in the vertical direction at least in a vehicle seat and capable of circulating air;
A heat supply unit connected to the first air circulation means;
Second air circulation means provided on a ceiling of the vehicle and capable of circulating air;
A first ventilation port through which air can be blown into the vehicle compartment from the first air circulation means;
A second ventilation opening capable of taking air from the passenger compartment into the second air circulation means;
A vehicle air conditioner having a third ventilation port through which air can be blown into the vehicle compartment from the second air circulation means,
The first ventilation port is installed so as to have an opening direction at a position above the first air circulation means and corresponding to the second ventilation port,
The second ventilation port is installed so as to have an opening direction at a position below the ceiling and at least corresponding to the first ventilation port,
The vehicle air conditioner characterized in that the first ventilation port and the second ventilation port are spaced apart.   The vehicle air conditioner according to claim 1, wherein the heat supply unit is provided on a floor of the vehicle. The seat is a seat whose position or angle is adjustable,
3. The vehicle air conditioner according to claim 1, wherein the second ventilation opening is adjusted to have an opening direction at a position corresponding to the first ventilation opening. 4.   The vehicle air conditioner according to any one of claims 1 to 3, wherein the first ventilation opening is provided on an upper surface of a headrest of the seat.   5. The vehicle air conditioner according to claim 1, further comprising a switching unit capable of switching a state of air sucking or blowing from the third ventilation opening between cooling and heating. apparatus.   The vehicle air conditioner according to any one of claims 1 to 5, wherein a direct injection portion capable of blowing out air is formed on a surface of the seat that comes into contact with an occupant seated on the seat. apparatus.   The vehicle air conditioner according to claim 6, wherein the direct injection unit includes a check valve capable of ventilating in the air blowing direction of the direct injection unit.   The vehicle air conditioner according to any one of claims 1 to 7, wherein the heat supply unit is a Peltier element.

Images