JP2019137244A - Air conditioner for vehicle - Google Patents

Abstract

To provide an air conditioner for a vehicle, facilitating making an occupant recognize that humidifying air is blown out into a cabin.SOLUTION: An air conditioner 1 includes: a storage part 25 for storing a moisture absorbing material 6; a recovery air passage 41 for guiding cool air to the storage part 25; a hot air passage 42 for guiding hot air to the storage part 25; a humidifying air passage 44 for guiding humidifying air into a cabin; and a bypass passage 45. Cool air passes through the moisture absorbing material 6 so as to supply moisture in cool air to the moisture absorbing material 6, and warm air passes through the moisture absorbing material 6 so as to form humidifying air. The bypass passage 45 bypasses the moisture absorbing material 6, and makes low-temperature air as air having a lower temperature than humidifying air join with humidifying air. With this, low-temperature air of an air quantity allowing lowering a temperature of humidifying air to a dew-point temperature or less is joined with humidifying air so as to generate white fog. Humidifying air can be recognized by an occupant by blowing out white fog into a cabin.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle air conditioner.

  Patent Document 1 discloses an air conditioner with a humidifier in which a humidifier operable with no water supply is installed in a vehicle air conditioner that performs air conditioning in a vehicle interior.

Japanese Patent Laying-Open No. 2015-217917

  Even if the humidified air humidified by the humidifier is blown into the vehicle interior from the vehicle air conditioner, the humidified air is not visible. For this reason, it is difficult for the occupant to know whether or not the humidified air is blown out.

  An object of this invention is to provide the vehicle air conditioner which can make a passenger | crew easily recognize that the humidification wind is blowing in the vehicle interior in view of the said point.

In order to achieve the above object, the invention described in claim 1
A vehicle air conditioner that performs air conditioning in a passenger compartment,
An air conditioning case (2) forming a ventilation path (10);
A cooling device (4) for cooling the wind in the ventilation path;
A heating device (5) for heating the wind that has passed through the cooling device;
A moisture absorbent (6) capable of adsorbing moisture in the air and releasing moisture into the air;
An accommodating portion (25) for accommodating a moisture absorbent;
The cool air that has passed through the cooling device and is cooled and does not pass through the heating device is guided to the housing, and the cool air passes through the hygroscopic material so that moisture contained in the cold air is adsorbed to the hygroscopic material. A cold air passage (41);
A warm air passage (42) that guides warm air, which is wind heated through the heating device, to the housing;
A humidified air passage (44) that guides humidified air, which is wind that has been warmed by the warm air passing through the absorbent material, into the vehicle interior;
A bypass passage (45) is provided that bypasses the hygroscopic material and joins the low-temperature air, which is lower in temperature than the humidified air, to the humidified air.

  According to this, white mist can be generated by merging the humidified air with a low-temperature air having an air volume capable of lowering the temperature of the humidified air below the dew point temperature. Therefore, by blowing white mist into the passenger compartment, the occupant can easily recognize that the humidified air is blown into the passenger compartment.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

It is a front view of the air-conditioner for vehicles of a 1st embodiment. It is a side view of the temperature adjustment unit and humidifier of the vehicle air conditioner in the II-II line cross section of FIG. It is sectional drawing of the temperature adjustment unit and humidifier of the vehicle air conditioner in the III-III line cross section of FIG. It is sectional drawing of the temperature adjustment unit of a vehicle air conditioner and a humidifier in the IV-IV line cross section of FIG. It is sectional drawing of the humidifier of 1st Embodiment at the time of a 1st humidification driving | operation. It is sectional drawing of the humidifier of 1st Embodiment at the time of a 2nd humidification driving | operation. It is sectional drawing of the temperature adjustment unit and humidifier of the vehicle air conditioner of 2nd Embodiment.

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

(First embodiment)
A first embodiment will be described with reference to the drawings. The air conditioner of this embodiment is mounted inside the instrument panel of the vehicle. This air conditioner adjusts the temperature and humidity of air taken from inside or outside the vehicle interior, and air is conditioned in the vehicle interior by blowing the air into the vehicle interior from a plurality of outlets provided in the vehicle interior. It is. Moreover, this air conditioner can also blow humid air toward a passenger's face or the like from a predetermined outlet provided in the passenger compartment without requiring water supply.

  As shown in FIGS. 1 to 4, the air conditioner 1 includes an air conditioning case 2, a blower 3, an evaporator 4, a heater core 5, and a hygroscopic material 6.

  The air conditioning case 2 constitutes the outer shell of the air conditioner 1. The air conditioning case 2 is formed of a resin (for example, polypropylene) having a certain degree of elasticity and excellent in strength. A ventilation path 10 through which air flows is formed inside the air conditioning case 2. In other words, the air conditioning case 2 forms the ventilation path 10 through which the wind passes inside the air conditioning case 2.

  Inside the air conditioning case 2, a partition plate 13 that partitions the ventilation path 10 into an upper ventilation path 11 on the upper side in the gravity direction and a lower ventilation path 12 on the lower side in the gravity direction is provided.

  The air-conditioning case 2 has an inside air introduction port 14 for introducing vehicle interior air (ie, inside air) into the air passage 10 and an air flow outside the vehicle compartment (ie, outside air) on the most upstream side of the air passage 10 in the air flow direction. 10 has an outside air inlet 15 for introduction into the air. The inside air introduction port 14 and the outside air introduction port 15 are connected to a duct (not shown) configured as a separate member from the air conditioning case 2. Air is introduced into the upper ventilation path 11 and the lower ventilation path 12 from the inside air introduction port 14 or the outside air introduction port 15 through these ducts.

  In the vicinity of the inside air introduction port 14 and the outside air introduction port 15, an inside / outside air switching door 16 as an inside / outside air switching unit is provided. The inside / outside air switching door 16 opens and closes the inside air introduction port 14 and the outside air introduction port 15. The inside / outside air switching door 16 may be provided with a door for opening / closing the inside air introduction port 14 and a door for opening / closing the outside air introduction port 15 separately.

  The air conditioner 1 of the present embodiment can switch the air conditioning mode for introducing outside air or inside air to the upper ventilation path 11 and the lower ventilation path 12 by rotating the inside / outside air switching door 16 to a desired position. Is possible. As this air conditioning mode, an outside air mode, an inside air mode, and an inside / outside air two-layer mode can be set.

  In the outside air mode, the inside / outside air switching door 16 opens the outside air introduction port 15 and closes the inside air introduction port 14. At this time, the outside air inlet 15, the upper ventilation path 11, and the lower ventilation path 12 communicate with each other. Thereby, outside air is introduced into the upper ventilation path 11 and the lower ventilation path 12.

  In the inside air mode, the inside / outside air switching door 16 closes the outside air introduction port 15 and opens the inside air introduction port 14. At this time, the inside air inlet port 14, the upper ventilation path 11, and the lower ventilation path 12 communicate with each other. Thus, the inside air is introduced into the upper ventilation path 11 and the lower ventilation path 12.

  In the inside / outside air two-layer mode, the inside / outside air switching door 16 opens both the outside air introduction port 15 and the inside air introduction port 14. At this time, the outside air introduction port 15 and the upper ventilation path 11 communicate with each other, and the inside air introduction port 14 and the lower ventilation path 12 communicate with each other. Thereby, outside air is introduced into the upper ventilation path 11 and inside air is introduced into the lower ventilation path 12. FIG. 1 shows the position of the inside / outside air switching door 16 when the inside / outside air two-layer mode is selected.

  A blower 3 is provided in the ventilation path 10 inside the air conditioning case 2. The blower 3 includes a first centrifugal fan 31, a second centrifugal fan 32, an electric motor (not shown), and the like. By driving the electric motor, the first centrifugal fan 31 and the second centrifugal fan 32 rotate, and air is introduced into the upper ventilation path 11 and the lower ventilation path 12 from the inside air introduction port 14 or the outside air introduction port 15. Air blown by the first centrifugal fan 31 flows through the upper ventilation path 11, and air blown by the second centrifugal fan 32 flows through the lower ventilation path 12.

  Depending on the air conditioning mode, the air flowing through the ventilation path 10 is defroster blowing opening 19, face blowing opening 20, foot blowing opening 21, exhaust passage 43, or humidified air passage provided on the most downstream side in the air flow direction. 44 is blown out. In addition, the fan which the air blower 3 has is not restricted to a centrifugal fan, For example, it is good also as an axial fan or a cross flow fan.

  The evaporator 4 is a cooling device that cools the wind in the ventilation path 10. The evaporator 4 constitutes a vapor compression refrigeration cycle together with a compressor, a condenser, an expansion valve, and the like (not shown). The evaporator 4 is disposed downstream of the expansion valve and upstream of the compressor in the refrigeration cycle. In the tube (not shown) of the evaporator 4, the refrigerant that has been decompressed by the expansion valve and is in a gas-liquid two-layer state flows. The air flowing through the ventilation path 10 is cooled by heat exchange between the refrigerant flowing inside the tube of the evaporator 4 and the air flowing through the ventilation path 10.

  The heater core 5 is provided downstream of the evaporator 4 in the air flow direction. The heater core 5 is a heating device that heats the wind that has passed through the evaporator 4. Warm water (for example, engine cooling water) flows inside a tube (not shown) of the heater core 5. The air flowing through the ventilation path 10 is heated by heat exchange between the hot water flowing inside the tube of the heater core 5 and the air flowing through the ventilation path 10. A PCT heater or the like may be provided together with the heater core 5.

  Two air mix doors 17 are provided in the ventilation path 10 between the evaporator 4 and the heater core 5. The air mix door 17 is a sliding film door and is driven by the rotation of the gear 18. The air mix door 17 adjusts the ratio between the amount of air that bypasses the heater core 5 after passing through the evaporator 4 and the amount of air that passes through the heater core 5 after passing through the evaporator 4.

  The air conditioning case 2 has a plurality of outlet openings for sending conditioned air from the ventilation path 10 into the vehicle interior on the most downstream side in the air flow direction of the ventilation path 10. The plurality of blowing openings are configured by a defroster blowing opening 19, a face blowing opening 20, a foot blowing opening 21, and the like.

  In the state where the air conditioner 1 is mounted on the vehicle, the defroster blowout opening 19 and the face blowout opening 20 are provided in the upper part of the air conditioning case 2 in the gravity direction. The face blowing opening 20 blows air-conditioned air toward the upper body of the occupant seated in the front seat. A face door 22 is provided in the vicinity of the face blowing opening 20. The face door 22 opens and closes the face blowing opening 20. A face duct (not shown) is connected to the face blowing opening 20. The face duct is a duct that connects the face outlet 20 and a face outlet (not shown) provided in the passenger compartment. When the face door 22 opens the face blowing opening 20, the conditioned air flowing through the ventilation path 10 is blown from the face blowing opening 20 through the face duct toward the upper body of the occupant seated on the front seat from the face blowing opening. The

  The defroster blowing opening 19 blows conditioned air toward the windshield of the vehicle. A defroster door 23 is provided in the vicinity of the defroster outlet opening 19. The defroster door 23 opens and closes the defroster outlet opening 19. When the defroster door 23 opens the defroster blowout opening 19, the conditioned air flowing through the ventilation path 10 is blown out from the defroster blowout opening 19 through a defroster duct (not shown) toward the front windshield of the vehicle.

  The foot blowout openings 21 are respectively provided at the left and right portions in the vehicle width direction in a state where the air conditioner 1 is mounted on the vehicle. The foot blowing opening 21 blows air-conditioned air toward the lower body side of the occupant seated in the right front seat and the left front seat of the vehicle. A foot door 24 is provided at a location where the ventilation path 10 and the foot outlet opening 21 communicate with each other. The foot door 24 communicates or blocks the ventilation path 10 and the foot outlet opening 21. When the foot door 24 communicates the ventilation path 10 and the foot blowing opening 21, the conditioned air flowing through the ventilation path 10 is blown out from the foot blowing opening 21 toward the lower body side of the occupant.

  Furthermore, the air conditioner 1 according to the present embodiment includes an accommodating portion 25 that can accommodate the hygroscopic material 6. In the present embodiment, the accommodating portion 25 is configured as a separate body from the air conditioning case 2. In addition, the accommodating part 25 may be comprised as an integral molded product integrally molded with a part or all of the air conditioning case 2.

  The hygroscopic material 6 is accommodated in the accommodating space 26 formed inside the accommodating portion 25. The hygroscopic material 6 can adsorb moisture in the air and release moisture to the air. More specifically, the hygroscopic material 6 is a material in which a hygroscopic substance is carried on a corrugated member and is formed into a roll shape or a rectangular parallelepiped shape. The hygroscopic substance has characteristics of collecting moisture in the air and desorbing moisture in the air according to the humidity of the air. The hygroscopic material 6 may be one in which the above-described hygroscopic substance is supported on a honeycomb-like structure formed in a columnar shape or a rectangular parallelepiped shape. As the hygroscopic substance described above, for example, a polymer adsorbent of an organic material, or zeolite, silica gel, or the like of an inorganic material can be employed.

  As shown in FIGS. 3 and 4, the hygroscopic material 6 has an air inflow surface 61 and an air outflow surface 62. The air that has flowed in from the air inflow surface 61 of the hygroscopic material 6 flows through the gap between the structures formed inside the hygroscopic material 6, and flows out from the air outflow surface 62. In the following description, the space on the side where the air inflow surface 61 of the hygroscopic material 6 is arranged in the accommodation space 26 inside the accommodating portion 25 is referred to as the inflow space 261, and the air outflow surface 62 of the hygroscopic material 6 is The space on the side where it is arranged will be referred to as the outflow space 262. When the humidity of the air flowing through the storage space 26 from the inflow space 261 to the outflow space 262 is high, the hygroscopic material 6 collects moisture contained in the air. When the humidity of the air flowing through the storage space 26 from the inflow space 261 to the outflow space 262 is low, the hygroscopic material 6 releases moisture contained in the hygroscopic material 6 to the air.

  Further, the air conditioner 1 of the present embodiment includes a recovery air passage 41, a warm air passage 42, an exhaust passage 43, and a humidified air passage 44. The collection air passage 41, the warm air passage 42, the exhaust passage 43, and the humidified air passage 44 are formed inside the passage forming member. As the material constituting the passage forming member, the same type of resin as that constituting the air conditioning case 2 is used.

  The recovery air passage 41 communicates the recovery air outlet 40 provided in the side wall 200 of the ventilation path 10 and the inflow space 261. The recovery air outlet 40 is an opening provided in the side wall 200 of the ventilation path 10 in order to introduce the air, which has been cooled by the evaporator 4 and has a high relative humidity, into the recovery air passage 41. The side wall 200 of the ventilation path 10 is a wall extending from the lower side toward the upper side among the walls forming the ventilation path 10 in a state where the air conditioner 1 is mounted on the vehicle. The recovery air passage 41 is a passage for taking out the air cooled by the evaporator 4 from the recovery air outlet 40 and introducing it into the inflow space 261 of the housing portion 25. In other words, the recovery air passage 41 is a cold air passage that guides the cool air that has been cooled by passing through the evaporator 4 and that has not passed through the heater core 5 to the housing portion 25. The recovery air passage 41 is a passage for adsorbing moisture contained in the cold air to the hygroscopic material 6 during the recovery operation, as will be described later.

  The recovery air outlet 40 is provided between the evaporator 4 and the heater core 5 in the side wall 200 of the ventilation path 10. As described above, the recovery air outlet 40 is provided between the evaporator 4 and the heater core 5 in the ventilation path 10.

  Further, the recovery wind outlet 40 is provided on the side wall 200 of the lower ventilation path 12. When the inside / outside air two-layer mode or the inside air mode is performed, the inside air circulates in the lower ventilation path 12. The humidity of the inside air circulation is high due to the sweating of the passengers. Therefore, by providing the recovery wind take-off port 40 on the side wall 200 of the lower ventilation path 12 where the inside air circulation is performed, air having a high absolute humidity and a high relative humidity can be supplied from the recovery wind take-off port 40 to the storage unit 25 through the recovery wind passage 41. It is possible to supply.

  Further, as shown in FIG. 4, the recovery air outlet 40 is provided on one side wall 200 of the ventilation path 10 and the other side wall 200 of the ventilation path 10. The recovery air outlet 40 provided in one side wall 200 of the ventilation path 10 is referred to as a first recovery air outlet 401, and the recovery air outlet 40 provided in the other side wall 200 of the ventilation path 10 is referred to as a second recovery air outlet. It will be referred to as an outlet 402. Further, the recovery wind passage 41 that communicates the first recovery wind outlet 401 and the housing portion 25 is referred to as a first recovery wind passage 411, and the recovery wind passage 41 that communicates the second recovery wind outlet 402 and the housing portion 25. Is referred to as a second recovery air passage 412. Thus, the recovery air passage 41 of the present embodiment is provided outside the first recovery air passage 411 provided outside the one side wall 200 of the air conditioning case 2 and the other side wall 200 of the air conditioning case 2. And a second recovery air passage 412. Thereby, the temperature of the conditioned air blown out from each blowing opening provided on the right side in the vehicle width direction of the air conditioning case 2 and the conditioned air blown out from each blowing opening provided on the left side in the vehicle width direction, and The air volume balance is maintained.

  Further, as shown in FIG. 4, the recovery air passage 41 has a confluence portion 413 where the first recovery air passage 411 and the second recovery air passage 412 merge. A merge portion 413 is connected to the accommodating portion 25.

  One end of the warm air passage 42 opens to the downstream side of the heater core 5 in the ventilation passage 10, and the other end is connected to the accommodating portion 25. The warm air passage 42 is a passage for introducing air heated by the heater core 5 and having a low relative humidity into the inflow space 261 of the housing portion 25. In other words, the warm air passage 42 is a passage that guides the warm air that is heated by passing through the heater core 5 to the housing portion 25.

  One end of the exhaust passage 43 is connected to the housing portion 25, and the other end opens to the outside of the housing portion 25. The exhaust passage 43 is a passage for discharging air from the outflow space 262 of the housing portion 25.

  One end of the humidified air passage 44 is connected to the accommodating portion 25, and the other end is connected to a face air outlet (not shown) provided in the vehicle interior. The other end of the humidified air passage 44 may be connected to a humidified air outlet (not shown) provided in the vehicle compartment separately from the face outlet. The humidified air outlet blows out the humidified air toward the passenger's upper body, particularly the face. The humidified air passage 44 is a passage for blowing the air humidified in the accommodation space 26 toward the vehicle interior. In other words, the humidified air passage 44 is a passage that guides the humidified air, which is a wind that has been warmed by the warm air passing through the hygroscopic material 6, into the vehicle interior.

  Further, as shown in FIG. 3, the air conditioner 1 of the present embodiment includes a recovery wind door 51, a warm air door 52, an exhaust door 53, and a humidified air door 54. The recovery wind door 51 and the warm air door 52 are provided in the inflow space 261 of the housing portion 25. The recovery wind door 51 communicates and blocks the recovery wind passage 41 and the accommodation space 26. More specifically, the recovery wind door 51 communicates and blocks the merging portion 413 and the accommodation space 26 shown in FIG. The warm air door 52 communicates and blocks the warm air passage 42 and the accommodation space 26. The exhaust door 53 and the humidified air door 54 are provided in the outflow space 262 of the housing portion 25. The exhaust door 53 communicates and blocks the exhaust passage 43 and the accommodation space 26. The humidified air door 54 communicates and blocks the humidified air passage 44 and the accommodation space 26.

  Furthermore, the air conditioner 1 of this embodiment includes a bypass passage 45 and a low temperature wind door 55. The bypass passage 45 is a passage that bypasses the hygroscopic material 6 and joins the humid air with low-temperature air that is lower in temperature than the humid air. In the present embodiment, cold air that is cooled by passing through the evaporator 4 and not passing through the heater core 5 is used as the low-temperature air. The bypass passage 45 guides the cool air that has flowed out of the recovery air passage 41 to the humidified air passage 44.

  The bypass passage 45 has one end 451 connected to the housing portion 25 and the other end 452 connected to the humidified air passage 44. One end 451 of the bypass passage 45 is connected next to the connection port of the recovery air passage 41 in the housing portion 25. The other end 452 of the bypass passage 45 is connected to the vicinity of the accommodating portion 25 in the humidified air passage 44.

The low temperature wind door 55 is provided at a confluence portion of the bypass passage 45 in the humidified air passage 44. In other words, the low temperature wind door 55 is provided on the outlet side of the bypass passage 45.
The low temperature wind door 55 communicates and blocks the bypass passage 45 and the humidified air passage 44.

  Further, in the present embodiment, the recovery wind door 51 has a first state where the recovery air passage 41 communicates with at least the accommodation space 26 and a second state where the recovery air passage 41 does not communicate with both the accommodation space 26 and the bypass passage 45. The state and the third state in which the collection air passage 41 communicates only with the bypass passage 45 of the accommodation space 26 and the bypass passage 45 are switched.

  The air conditioner 1 according to the present embodiment switches between the recovery operation and the humidification operation as described below. The recovery operation is an operation in which cold air passes through the hygroscopic material 6 and warm air does not pass through the hygroscopic material 6. Thereby, the hygroscopic material 6 collects moisture from the cold air. The hygroscopic material 6 stores the collected water. The humidification operation is an operation in which warm air passes through the moisture absorbent 6 and passes through the humidified air passage 44, and cold air does not pass through the moisture absorbent 6. Thereby, the moisture absorption material 6 discharge | releases a water | moisture content to warm air, and warm air is humidified. A humidified wind is created.

  The humidification operation includes a first humidification operation and a second humidification operation. The first humidifying operation is a humidifying operation that does not generate white fog. The second humidification operation is a humidification operation in which white mist is generated by combining low-temperature air with humidified air. For example, the second humidifying operation is performed when the vehicle is stopped. Further, the second humidification operation may be performed during a predetermined period immediately after the start of the humidification operation.

(Recovery operation)
As shown in FIG. 3, each of the recovery wind door 51 and the exhaust door 53 is opened. For this reason, it will be in the 1st state where recovery wind passage 41 and accommodation space 26 communicate. The exhaust passage 43 and the accommodation space 26 communicate with each other. Each of the warm air door 52, the humidified air door 54, and the low temperature air door 55 is closed. For this reason, the warm air passage 42 and the accommodation space 26 are blocked. The humidified air passage 44 and the accommodation space 26 are blocked. The humidified air passage 44 and the bypass passage 45 are blocked.

  As a result, the cold air introduced into the accommodation space 26 from the recovery air passage 41 flows through the moisture absorbent material 6 from the air inflow surface 61 of the moisture absorbent material 6. Moisture contained in the cold air flowing through the hygroscopic material 6 is adsorbed by the hygroscopic material 6. Then, the cold air whose humidity has been lowered through the hygroscopic material 6 is discharged from the exhaust passage 43 to the outside of the air conditioning case 2.

(First humidification operation)
As shown in FIG. 5, each of the warm air door 52 and the humidified air door 54 is opened. For this reason, the warm air passage 42 and the accommodation space 26 communicate with each other. The humidified air passage 44 and the accommodation space 26 communicate with each other. The recovery wind door 51 is closed. For this reason, it will be in the 2nd state where recovery wind passage 41 does not communicate with both accommodation space 26 and bypass passage 45. Each of the exhaust door 53 and the low temperature wind door 55 is closed. For this reason, the exhaust passage 43 and the accommodation space 26 are blocked. The humidified air passage 44 and the bypass passage 45 are blocked.

  Thereby, the warm air introduced into the accommodation space 26 from the warm air passage 42 flows through the moisture absorbent material 6. Humidified air is formed by releasing moisture contained in the hygroscopic material 6 against the warm air flowing through the hygroscopic material 6. Then, the humidified air having increased in humidity after passing through the moisture absorbent 6 passes through the humidified air passage 44 and is blown out from the face air outlet or the humidified air outlet into the vehicle interior.

(Second humidification operation)
As shown in FIG. 6, each of the warm air door 52 and the humid air door 54 is opened as in the first humidification operation. The exhaust door 53 is closed. Accordingly, the humidified air flows through the humidified air passage 44 as in the first humidifying operation.

  Further, in the second humidification operation, the recovery wind door 51 is set to the third state position. The low temperature wind door 55 is opened. At this time, the low temperature wind door 55 does not block the humidified air passage 44. For this reason, the recovery air passage 41 and the humidification air passage 44 communicate with each other through the bypass passage 45.

  As a result, cool air that has been cooled by passing through the evaporator 4 and not passing through the heater core 5 flows in the order of the recovery air passage 41 and the bypass passage 45 and flows into the humidified air passage 44. Cold air merges with the humidified air flowing through the humidified air passage 44. At this time, the door position of the low temperature wind door 55 is set to a position where the air volume of the cool air flowing through the bypass passage 45 becomes an air volume capable of setting the temperature of the humidified air below the dew point temperature. When the humidified air is cooled below the dew point temperature by the cold air, the moisture contained in the humidified air is liquefied in the air and white mist is generated. White fog is a collection of minute droplets. In this way, white mist is generated by the cool air that satisfies the condition for generating white mist joining the humidified air. The white mist passes through the humidified air passage 44 and is blown into the vehicle compartment from the face air outlet or the humid air outlet.

(Temperature adjustment of humidification air during the first humidification operation)
When it is desired to lower the temperature of the humidified air in the first humidifying operation, the recovery wind door 51 is set to the third state as in the second humidifying operation. The low temperature wind door 55 is opened. However, unlike the second humidifying operation, the door position of the low temperature wind door 55 is a position where white fog does not occur. At this time, the amount of wind flowing through the bypass passage 45 can be adjusted by changing the position of the low temperature wind door 55. Thereby, the temperature of humidification air can be adjusted to desired temperature.

  The air conditioner 1 of this embodiment demonstrated above has the following effect.

  (1) The air conditioner 1 includes a bypass passage 45 that bypasses the hygroscopic material 6 and joins the low-temperature air to the humidified air. According to this, white mist can be generated by merging the humidified air with a low-temperature air having an air volume capable of lowering the temperature of the humidified air below the dew point temperature. Therefore, by blowing white mist into the passenger compartment, the occupant can easily recognize that the humidified air is blown into the passenger compartment.

  (2) The air conditioner 1 includes a recovery air door 51, a warm air door 52, an exhaust door 53, and a humidified air door 54. These doors 51, 52, 53, and 54 are switching devices for switching between the recovery operation and the humidification operation as described above. According to this, the recovery operation and the humidification operation can be performed alternately. For this reason, after fully storing water | moisture content in the hygroscopic material 6, the humid air of high humidity about 80-90% of relative humidity can be produced by letting warm air pass through this hygroscopic material 6. FIG.

  (3) The air conditioner 1 includes a recovery wind door 51 and a low temperature wind door 55. In the recovery operation, these doors 51 and 55 reduce the amount of cool air flowing through the bypass passage 45 to zero. In the first humidification operation, the doors 51 and 55 reduce the air volume of the cool air flowing through the bypass passage 45 to zero. At the time of temperature adjustment in the first humidifying operation, these doors 51 and 55 make the air volume of the cool air flowing through the bypass passage 45 an air volume that does not satisfy the condition for generating white fog. In the second humidification operation, these doors 51 and 55 make the air volume of the cool air flowing through the bypass passage 45 the air volume that satisfies the condition for generating white fog. Thus, these doors 51 and 55 are adjusting devices that adjust the air volume of the cold air flowing through the bypass passage 45.

  According to this, when supplying the humidified air into the vehicle interior, it is possible to adjust the amount of the cool air to be added to the humidified air by the recovery wind door 51 and the low temperature wind door 55. Thereby, a 1st humidification driving | operation and a 2nd humidification driving | operation can be switched. Further, in the first humidifying operation, the temperature of the humidified air can be adjusted by adjusting the amount of the cool air to be added to the humidified air within a range where white fog does not occur. Here, in the first humidification operation, the humidified air is blown out to the occupant from the face air outlet or the humidified air outlet. At this time, when the high-temperature humidified air reaches the occupant's face, discomfort due to hot flashes occurs in the occupant. According to this embodiment, the temperature of the humidified air can be adjusted during the first humidifying operation. For this reason, the discomfort by hot flashes can be reduced by lowering the temperature of the humidified air.

  (4) The bypass passage 45 bypasses the hygroscopic material 6 and joins the humidified air with the cool air that has been cooled by passing through the evaporator 4 and not passing through the heater core 5. According to this, the cold air formed by the evaporator 4 is used as the low temperature air. Thereby, compared with the case where low temperature wind is formed with the cooling device different from the evaporator 4 with which the air conditioner 1 is provided, the number of components of the air conditioner 1 can be reduced. Therefore, the cost of the air conditioner 1 can be reduced.

(Second Embodiment)
As shown in FIG. 7, in the present embodiment, the wind flowing through the bypass passage 45 is different from that in the first embodiment. The other structure of the air conditioner 1 is the same as 1st Embodiment.

  One end 451 of the bypass passage 45 is connected to a portion of the air conditioning case 2 that is on the upstream side of the air flow from the evaporator 4 and in which the upper ventilation path 11 is formed. The bypass passage 45 can guide the outside air introduced into the upper ventilation path 11 to the humidified air passage 44 in the outside air mode or the inside / outside air two-layer mode.

  The second humidification operation is performed mainly in the winter when the temperature of the outside air is low. For this reason, in the second humidification operation, the low temperature wind door 55 opens the bypass passage 45 in the outside air mode or the inside / outside air two-layer mode. Thereby, the wind of the outside air having a temperature lower than that of the humidified air flows in the order of the bypass passage 45 and flows into the humidified air passage 44. A wind of outside air that is cooler than the humidified air joins the humidified air flowing through the humidified air passage 44. Thereby, also by this embodiment, white fog can be generated and the effect similar to 1st Embodiment is acquired.

  (Other embodiments)

  (1) In the first embodiment, one end 451 of the bypass passage 45 is connected to the accommodating portion 25. However, one end 451 of the bypass passage 45 may be connected to the recovery air passage 41. Further, one end 451 of the bypass passage 45 may be directly connected to the air conditioning case 2 instead of the recovery air passage 41. In this case, one end 451 of the bypass passage 45 is connected to a portion of the air conditioning case 2 through which cold air that has been cooled by passing through the evaporator 4 and not passing through the heater core 5 flows. Also by these, it is possible to flow cool air that is cooled by passing through the evaporator 4 and not passing through the heater core 5 through the bypass passage 45. In these cases, a door for opening and closing the bypass passage 45 may be provided on the inlet side of the bypass passage 45.

  (2) In each of the above embodiments, the other end 452 of the bypass passage 45 is connected to the humidified air passage 44. However, the other end 452 of the bypass passage 45 may be connected to the outflow space 262 of the housing portion 25. Even in this case, the low-temperature air can be combined with the humidified air by bypassing the hygroscopic material 6.

  (3) In the first and second embodiments, the low temperature wind flowing through the bypass passage 45 is wind passing through the ventilation path 10 of the air conditioning case 2. However, the low temperature wind flowing through the bypass passage 45 may not be the wind passing through the ventilation path 10. For example, outside air in winter may flow through the bypass passage 45 without passing through the air conditioning case 2.

  (3) In each of the above embodiments, the air conditioner 1 switches between the recovery operation and the humidification operation. That is, in each of the above embodiments, the humidified air is intermittently blown out into the passenger compartment. However, the humidified air may be continuously blown out into the passenger compartment. For example, the continuous blowing of the humidified air is realized as follows. In this case, the air conditioner 1 is configured so that the cool air passes through a part of the hygroscopic material 6 and the warm air passes through another part of the hygroscopic material 6. According to this, moisture is collected from the cool air to the moisture absorbent material 6 in the portion of the moisture absorbent material 6 through which the cold wind has passed. In the portion of the hygroscopic material 6 where warm air passes, moisture is released from the hygroscopic material 6 to the warm air.

  (4) In each of the above-described embodiments, the evaporator 4 is used as a cooling device that cools the wind passing through the ventilation path 10 of the air conditioning case 2. On the other hand, in other embodiments, for example, an air-air heat exchanger that cools air using low-temperature air such as outside air or a Peltier module may be used as the cooling device.

  (5) In each of the above embodiments, the heater core 5 is used as a heating device that heats the air passing through the ventilation path 10 of the air conditioning case 2. On the other hand, in other embodiments, for example, an electric heater or a Peltier module may be used as the heating device.

  (6) The present invention is not limited to the above-described embodiment, and can be appropriately changed within the scope described in the claims, and includes various modifications and modifications within the equivalent range. Further, the above embodiments are not irrelevant to each other, and can be combined as appropriate unless the combination is clearly impossible. In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily essential unless explicitly stated as essential and clearly considered essential in principle. Yes. Further, in each of the above embodiments, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is clearly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to the specific number except for the case. In each of the above embodiments, when referring to the material, shape, positional relationship, etc. of the constituent elements, etc., unless otherwise specified, or in principle limited to a specific material, shape, positional relationship, etc. The material, shape, positional relationship, etc. are not limited.

(Summary)
According to the first aspect shown in part or all of the above embodiments, the vehicle air conditioner includes an air conditioning case, a cooling device, a heating device, a hygroscopic material, a housing portion, and a cold air passage. A warm air passage, a humidified air passage, and a bypass passage are provided.

  According to the second aspect, the vehicle air conditioner further includes a switching device that switches between the recovery operation and the humidification operation. In the recovery operation, cold air passes through the hygroscopic material, and warm air does not pass through the hygroscopic material. As a result, moisture contained in the cold air is adsorbed by the moisture absorbent and the moisture is recovered. In the humidification operation, warm air passes through the moisture absorbing material and flows through the humidified air passage, and cold air does not pass through the moisture absorbing material. This humidifies the warm air.

  According to this, the recovery operation and the humidification operation can be performed alternately. For this reason, after fully storing a moisture in a hygroscopic material, a humid air of high humidity can be created by passing warm air through the hygroscopic material. The first aspect is preferably applied to the vehicle air conditioner according to the second aspect.

  Moreover, according to the 3rd viewpoint, the vehicle air conditioner is further equipped with the adjustment apparatus which adjusts the quantity of the wind which flows through a bypass channel. According to this, when supplying humidified air into a vehicle interior, the quantity of the low temperature wind added to humidified air can be adjusted. Adjusting the amount of wind includes reducing the amount of wind to zero. By adjusting the amount of low-temperature air added to the humidified air, when supplying the humidified air into the vehicle interior, it is possible to switch between when white mist is generated and when white mist is not generated. Furthermore, the temperature of the humidified air can be adjusted by adjusting the amount of the low temperature air added to the humidified air.

  Further, according to the fourth aspect, the bypass passage is a low-temperature wind that is cooled by passing through the cooling device and not passing through the heating device, bypassing the hygroscopic material and joining the humidified air. Let According to this, the cold wind formed by the cooling device of the vehicle air conditioner is used as the low temperature wind. For this reason, compared with the case where low temperature wind is formed with the cooling device different from the cooling device with which a vehicle air conditioner is provided, the number of the components of a vehicle air conditioner can be reduced. Therefore, the cost of the vehicle air conditioner can be reduced.

2 Air Conditioning Case 4 Evaporator 5 Heater Core 6 Moisture Absorbing Material 25 Storage Portion 41 Recovery Air Passage 42 Warm Air Passage 44 Humidification Air Passage 45 Bypass Passage

Claims (4)

A vehicle air conditioner that performs air conditioning in a passenger compartment,
An air conditioning case (2) forming a ventilation path (10);
A cooling device (4) for cooling the wind in the ventilation path;
A heating device (5) for heating the wind that has passed through the cooling device;
A moisture absorbent (6) capable of adsorbing moisture in the air and releasing moisture into the air;
An accommodating portion (25) for accommodating the moisture absorbent;
The cool air that has passed through the cooling device and has been cooled and that has not passed through the heating device is guided to the housing portion, and the cold air passes through the moisture absorbent, so that moisture contained in the cool air is reduced. A cold air passage (41) to be adsorbed on the moisture absorbent,
A warm air passage (42) for guiding warm air, which is wind heated through the heating device, to the housing portion;
A humidified air passage (44) for introducing humidified air, which is a wind humidified by the warm air passing through the hygroscopic material, into the vehicle interior;
A vehicle air conditioner comprising: a bypass passage (45) for bypassing the hygroscopic material and merging the humid air with low-temperature air that is lower in temperature than the humid air.   The cold air passes through the hygroscopic material, and the warm air does not pass through the hygroscopic material, whereby the moisture contained in the cold air is adsorbed to the hygroscopic material and the moisture is collected from the cold air; and the warm air The apparatus further comprises a switching device (51, 52, 53, 54) for switching between a humidifying operation for humidifying the warm air when the wind passes through the hygroscopic material and the cold air does not pass through the hygroscopic material. The vehicle air conditioner described in 1.   The vehicle air conditioner according to claim 1 or 2, further comprising an adjustment device (51, 55) for adjusting an amount of air flowing through the bypass passage.   The bypass passage bypasses the hygroscopic material and joins the humidified air with the low-temperature air that has been cooled by passing through the cooling device and does not pass through the heating device. The vehicle air conditioner according to any one of 1 to 3.

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