JP3705136B2 - Air conditioner for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle air conditioner mounted on an automobile or the like.
[0002]
[Prior art]
The vehicle air conditioner includes a cooler that cools the intake air taken into the device, a heater that heats the cooled air, and an adjustment unit that adjusts the ratio of the amount of air that is led to the heater. . And the ratio of the air quantity is changed by this adjusting means, and the temperature of the conditioned air blown out from the air conditioner into the vehicle interior is adjusted.
[0003]
[Problems to be solved by the invention]
When the intake air is cooled, dehumidified water is condensed on the cooler, and the water droplets may be blown off by the cooling air and reach the heater. As a result, there has been a problem that the heating capacity of the heater is reduced, or the blown air is humidified by heating and evaporation of water droplets, resulting in fogging of the passenger compartment windows. Conventionally, for such a problem, the distance between the cooler and the heater is lengthened so that the scattered water droplets do not reach the heater (see FIG. 2), or between the cooler and the heater. A shielding plate for preventing water droplets was provided in the air blowing space (see FIG. 3).
[0004]
However, when the distance between the cooler and the heater is increased, there is a disadvantage that the apparatus itself is increased in size. Further, when a shielding plate is additionally installed in the air blowing space between the cooler and the heater, there is a problem that the air blowing resistance increases and the air flow resistance of the air conditioner deteriorates.
[0005]
The objective of this invention is providing the vehicle air conditioner which can reduce re-evaporation of dehumidified water, suppressing the enlargement of an apparatus and deterioration of ventilation resistance.
[0006]
[Means for Solving the Problems]
In association with FIGS. 1 and 5 shows an embodiment of the invention will be described.
(1) Describing in association with FIG. 5, the invention of claim 1 relates to a cooler 7 that cools the sucked air, a heater 8 that heats the sucked air, and a maximum heating state (a). A temperature adjustment door 19 that moves between the maximum cooling state (b) and adjusts the air volume of the cooling air from the cooler 7 and the heating air from the heater 8 to adjust the temperature of the conditioned air; It is applied to the vehicle air conditioner provided, and is provided below the cooler 7 and the temperature control door 19 , and is provided with drainage paths 11a and 11b for discharging the dehumidified water W generated by the cooling to the outside of the apparatus, and the temperature control door 19 is the cooler 7 so that the heater 8 is disposed behind the temperature control door 19 when viewed from the cooler 7 side in any state from the maximum heating state (a) to the maximum cooling state (b). It is provided between the heater 8 and scattered from the cooler 7 to the heater 8. The above-mentioned object is achieved by shielding the dehumidified water W to be performed.
(2) Referring to FIG. 1, the vehicle air conditioner according to the second aspect of the present invention includes a cooler 7 that cools the sucked air, a heater 8 that heats the sucked air, and a cooler. A shielding member 9 that is provided between the cooler 7 and the heater 8 so that the heater 8 is hidden behind when viewed from the side 7, and shields the dehumidified water W scattered from the cooler 7 to the heater 8 ; It constitutes a part of the shielding member 9 and moves between the maximum heating state (a) and the maximum cooling state (b), and the respective air volumes of the cooling air from the cooler 7 and the heating air from the heater 8 And a temperature adjustment door 9a for adjusting the temperature of the conditioned air.
(3) Referring to FIG. 5, the invention of claim 3 is provided with drainage paths 11a and 11b for discharging the dehumidified water W to the outside of the apparatus, and the surface of the temperature control door 19 facing the cooler 7 is provided. The drainage channels 11a and 11b are formed so as to be inclined downward.
( 4 ) Describing in association with FIG. 1, the invention of claim 4 is the vehicle air conditioner according to any one of claims 1 to 3, and opposes at least the heater 8 of the temperature adjustment door 9. The part is formed of the heat insulating material 9c.
[0007]
In the section of means for solving the above problems, the drawings of the embodiments of the invention are used for easy understanding of the present invention. However, the present invention is not limited to the embodiments of the invention. Absent.
[0008]
【The invention's effect】
(1) According to the inventions of claims 1 and 2 , since the dehumidified water splashed from the cooler is shielded by the temperature control door, the re-evaporation of the dehumidified water is reduced while suppressing the enlargement of the device and the deterioration of the airflow resistance. can do.
(2) According to the invention of claim 3, since the dehumidified water adhering to the temperature control door also flows down to the drainage path, it is surely discharged out of the apparatus through the drainage path.
(3) According to the invention of claim 4 , the same effect as in claims 1 to 3 can be obtained, and at least the portion of the temperature control door that faces the heater is formed of a heat insulating material. The resulting temperature rise on the cooler side of the temperature control door can be suppressed, and re-evaporation of the dehumidified water scattered on the temperature control door can be reduced.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
-First embodiment-
FIG. 1 is a diagram for explaining a first embodiment of a vehicle air conditioner according to the present invention, and is a diagram showing a schematic configuration of a main part of the vehicle air conditioner. Reference numeral 2 denotes an outside air intake port for taking air outside the vehicle into the air conditioner 1, and 3 is an inside air intake port for taking air inside the vehicle interior into the air conditioner 1. These air is taken into the air conditioner 1 when the blower fan 4 operates. The intake door 5 is for adjusting the ratio of outside air and inside air taken into the air conditioner 1, and the ratio is adjusted by changing the inclination of the intake door 5.
[0010]
The air conditioning unit 6 includes an evaporator 7 for cooling the intake air, a heater core 8 for heating a part of the cooling air from the evaporator 7, an air mix door 9 for adjusting the ratio of the cooling air heated by the heater core 8, and the like. Is provided. The evaporator 7 is disposed so as to be inclined so that the cooling air is blown out obliquely downward to the right in the figure. The air mix door 9 includes a movable portion 9a and a fixed portion 9b. A heat insulating member 9c is provided on the surface of the movable portion 9a facing the heater core 8. Reference numeral 11 denotes a case of the air conditioning unit 6, and a bottom surface portion 11 a of the case 11 is inclined downward to the left, and a drain outlet 11 b is formed at the lower left corner of the case 11. That is, the drainage path is constituted by the bottom 11a and the drainage port 11b.
[0011]
The movable portion 9a is provided so as to be rotatable with respect to the fixed portion 9b with the shaft portion 9d as a rotation axis. By driving a drive device (not shown), the movable portion 9a can be rotated to an arbitrary position between the position (a) in the maximum heating state and the position (b) in the maximum cooling state. Since the heater core 8 is disposed so that the left side of the heated air outlet is lower in the figure, the movable portion 9a is inclined downwardly to the left even if the movable portion 9a is in a position (b) where the movable portion 9a is substantially in close contact with the outlet of the heater core 8. are doing. The fixing portion 9b is formed of a heat insulating material so that the temperature rise due to the heater core 8 is small, or a minute gap is formed between the fixing portion 9b and the heater core 8.
[0012]
As can be seen from FIG. 1, the heater core 8 is disposed behind the movable portion 9 a and the fixed portion 9 b when viewed from the evaporator 7 side, and the evaporator 7 cannot be directly viewed from the heater core 8. Such a situation does not change at all even if the movable part 9a is moved between the position (a) and the position (b). In FIG. 1, only a part of the air conditioning unit 6 is shown. A vent door that adjusts the amount of air blown from the vent outlet of the air conditioner, a foot door that adjusts the amount of air blown from the foot outlet, etc. Illustration is omitted.
[0013]
Outside air and / or inside air is sucked into the apparatus 1 by the blower fan 4, and the sucked air is introduced into the case 11 of the air conditioning unit 6 through the evaporator 7. The intake air is cooled while passing through the evaporator 7, a part further passes through the heater core 8, and the rest passes between the evaporator 7 and the movable portion 9a and is sent in the downstream direction of the air conditioner.
[0014]
On the other hand, the cooling air sent to the heater core 8 side is heated by the heater core 8. The heated air passes through between the movable portion 9a and the heater core 8 and is mixed with the cooling air that passes through between the evaporator 7 and the movable portion 9a. As a result, the conditioned air at a desired temperature is sent to a vehicle interior outlet (not shown) provided on the downstream side of the case 11.
[0015]
The ratio of the cooling air heated by the heater core 8 and the cooling air passing between the evaporator 7 and the movable part 9a can be changed by changing the position (opening degree) of the movable part 9a. That is, the temperature of the conditioned air is adjusted to a desired set temperature by changing the position of the movable portion 9a and changing the ratio of the cooling air and the heating air. For example, if the movable part 9a is moved in the position (a) direction, the ratio of heated air increases and the temperature of the conditioned air increases. Conversely, if the movable part 9a is moved in the position (b) direction, the temperature of the conditioned air decreases. To do.
[0016]
By the way, when the intake air is cooled by the evaporator 7, a part of the water vapor contained in the intake air is condensed and dehumidified water W is generated. The dehumidified water W is blown off by the cooling air blown obliquely downward from the evaporator 7 and scattered in the diagonally downward right direction, that is, toward the air mix door 9 and the bottom of the case 11.
[0017]
However, since the heater core 8 is shielded by the movable portion 9 a and the fixed portion 9 b and is disposed at a position where the evaporator 7 cannot be directly viewed, the scattered dehumidified water W cannot reach the heater core 8. Therefore, it is possible to prevent the scattered dehumidified water W from contacting the heater core 8 and re-evaporating. Further, since the heat insulating material 9c is provided on the heater core side of the movable portion 9a, and the fixed portion 9b is formed of a heat insulating material, the evaporator side and the fixed portion 9b of the movable portion 9a are prevented from increasing in temperature due to the influence of the heater core 8. Thus, evaporation of the dehumidified water W adhering to the air mix door 9 can be reduced.
[0018]
The movable portion 9a is inclined to the lower left at any position between the position (a) and the position (b), and the surface of the fixed portion 9b is substantially vertical, so that the movable portion 9a is attached to the air mix door 9. The dehumidified water W thus dropped falls on the bottom 11a of the case 11 due to gravity. Since the bottom portion 11a is inclined downwardly to the left, the dehumidified water W dropped from the air mix door 9 and the dehumidified water W scattered on the bottom portion 11a flow down on the left side on the bottom portion 11a to the outside of the apparatus from the drain port 11b. It is discharged and further out of the passenger compartment.
[0019]
Further, when the blowing by the blower fan 4 is stopped, the dehumidified water W condensed on the surface of the evaporator 7 falls due to gravity. In the present embodiment, the evaporator 7 is arranged so as to be inclined so that the cooling air is blown out to the lower right, so that the dehumidified water W adhering to the evaporator 7 falls to the bottom 11 a of the case 11. And discharged from the drain port 11b to the outside of the apparatus.
[0020]
2-4 is a figure which shows the other example of the vehicle air conditioner which solved the subject of this invention, and each shows an air-conditioning unit. In the air conditioner of FIG. 2, the distance between the evaporator 7 and the heater core 8 in the air conditioning unit 26 is increased so that the scattered dehumidified water W does not reach the heater core 8. For this reason, the apparatus itself is increased in size. The dehumidified water W is scattered on the bottom 21a of the case 21, flows down the bottom 21a in the direction of the drain 21b, and is drained out of the apparatus from the drain 21b. 29 is an air mix door.
[0021]
In the apparatus shown in FIG. 3, a shielding plate 30 is provided between the evaporator 7 and the heater core 8 in the air conditioning unit 36 instead of increasing the distance between the evaporator 7 and the heater core 8. The scattered dehumidified water W adheres to the shielding plate 30 and is drained out of the apparatus through the drain port 31b. However, in this apparatus, since the shielding plate 30 is provided in the ventilation passage between the evaporator 7 and the heater core 8, the ventilation resistance in the case 21 is deteriorated. In addition, when the air mix door 29 is in the maximum heating state (a), water droplets may reach the heater core 8 beyond the upper end of the shielding plate 30.
[0022]
In the apparatus shown in FIG. 4, the evaporator 7 and the heater core 8 are arranged in this order from the bottom in the vertical vertical direction in the case 41 of the air conditioning unit 46, and the intake air is directed from below to above as shown in FIG. It has a configuration to introduce. Therefore, the scattered dehumidified water W reaching the heater core 8 is reduced. Since the evaporator 7 is disposed so as to be inclined toward the drain port 41b, the dehumidified water W that has flowed down through the evaporator 7 is discharged from the drain port 41b to the outside of the apparatus. However, when the air supply is stopped as shown in FIG. 4B, since the air supply pressure from below the evaporator 7 is lost, most of the dehumidified water W falls inside the evaporator 7 due to gravity and drops to a place other than the drainage path. As a result, normal drainage cannot be performed.
[0023]
On the other hand, in the first embodiment described above, the dehumidified water W does not reach the heater core 8 and re-evaporation of the dehumidified water W due to the heat of the heater core 8 can be greatly reduced. Further, since the evaporator 7 is disposed so as to be inclined so that the direction of the cooling air outlet 7a of the evaporator 7 is lower than horizontal, the dehumidified water W dripped from the evaporator 7 enters the drainage path (the bottom portion 11a and the drainage port 11b). It falls and is properly discharged out of the device. Even if the direction of the cooling air outlet 7a of the evaporator 7 is horizontal, the same effect can be obtained.
[0024]
Furthermore, since the air mix door 9 also serves as a shielding means for the scattered dehumidified water W, the airflow resistance is not deteriorated and an increase in cost due to an increase in the number of parts can be suppressed.
[0025]
-Second Embodiment-
FIG. 5 is a diagram showing a second embodiment of the vehicle air conditioner according to the present invention, and is a diagram showing a schematic configuration of a part of the air conditioning unit 6 as in FIG. The same parts as those in FIG. 1 are denoted by the same reference numerals, and different parts will be mainly described below. In FIG. 5, illustration of the outside air introduction port 2, the inside air introduction port 3, and the intake door 5 is omitted.
[0026]
In the air conditioner 50 shown in FIG. 5, the heater core 8 is fixed on the bottom 11 a side of the case 11, and intake air from the blower fan 4 is independently introduced through the duct 18. Reference numeral 19 denotes an air mix door, which is configured to be rotatable between a position (a) and a position (b) about a shaft 19d provided on the bottom surface 11a as a rotation axis. Also in the case of the air mix door 19, a heat insulating material 19 c is provided on the side facing the heater core 8. The arrangement of the evaporator 7 is the same as that in the first embodiment described above. The heater core 3 is shielded by the air mix door 19 so that the evaporator 7 cannot be directly viewed from the heater core 8 side.
[0027]
The intake air blown to the evaporator 7 side is cooled by the evaporator 7, and the cooling air passes between the evaporator 7 and the air mix door 19 and is sent to the downstream side of the system. On the other hand, the intake air introduced into the heater core 8 is heated by the heater core 8, and the heated air passes between the air mix door 19 and the heater core 8 and is mixed with the cooling air cooled by the evaporator 7. As a result, conditioned air having a desired temperature is formed, and the conditioned air is sent to a vehicle interior outlet (not shown) provided on the downstream side of the system.
[0028]
Since the cooling air from the evaporator 7 is blown in the direction of the air mix door 19 obliquely downward to the right, the scattered dehumidified water W blown off by the cooling air is blocked by the air mix door 19 and reaches the heater core 8 side. No. Although the air mix door 19 is affected by the heat of the heater core 8, since the heat insulating material 18 a is provided on the heater core side of the air mix door 19, the temperature increase on the evaporator side of the air mix door 19 can be suppressed low. As a result, the re-evaporation of the dehumidified water W adhering to the evaporator side of the air mix door 19 can be reduced, and the dehumidified water W flows down along the air mix door 1 to the drain port side and from the drain port 11b to the outside of the apparatus. Drained.
[0029]
As a result, also in the second embodiment described above, the same effect as in the first embodiment can be obtained. Furthermore, in the second embodiment, unlike the first embodiment, the intake air is independently introduced into each of the evaporator 7 and the heater core 8, so that it is compared with the first embodiment. The intake area of the intake air is increased, and the ventilation resistance of the entire system can be reduced. Therefore, it is suitable for an air conditioner having a configuration in which a blower fan having a small static pressure characteristic is provided on the downstream side of the system.
[0030]
In the embodiment described above, only the movable core 9a and the heater core side of the air mix door 19 are made of a heat insulating material, but the entire air mix doors 9 and 19 may be formed of a heat insulating material.
[0031]
In the correspondence between the embodiment described above and the elements of the claims, the evaporator 7 is a cooler, the heater core 8 is a heater, the air mix door 9 is a temperature control door, and the bottom 11a and the drain port 11b are drains. Configure each path.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining a first embodiment of a vehicle air conditioner according to the present invention, and is a diagram showing a schematic configuration of a main part of the vehicle air conditioner.
FIG. 2 is a diagram showing another example of a vehicle air conditioner that solves the problem of the present invention, and shows a first example thereof;
FIG. 3 is a diagram showing another example of a vehicle air conditioner that solves the problem of the present invention, and shows a second example thereof.
FIG. 4 is a diagram showing another example of a vehicle air conditioner that solves the problems of the present invention, and shows a third example thereof, in which (a) shows when air is blown, and (b) ) Indicates when the air flow is stopped.
FIG. 5 is a diagram for explaining a second embodiment of a vehicle air conditioner according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,50 Vehicle air conditioner 4 Blower fan 6, 26, 36, 46 Air conditioning unit 7 Evaporator 8 Heater core 9, 19, 29 Air mix door 9a Movable part 9b Fixed part 9c, 19c Thermal insulation member 11, 21, 41 Case 11a, 21a Bottom portion 11b, 21b, 41b Drain port W Dehumidified water

Claims (4)

A cooler that cools the sucked air, a heater that heats the sucked air, and moves between a maximum heating state and a maximum cooling state, and the cooling air from the cooler and the heater In a vehicle air conditioner comprising a temperature adjustment door that adjusts the temperature of air-conditioned air by adjusting the air volume of each heated air,
The temperature control door includes the cooler and the heater so that the heater is hidden behind the temperature control door when viewed from the cooler side in any state from the maximum heating state to the maximum cooling state. An air conditioner for a vehicle, characterized in that the dehumidified water scattered between the cooler and the heater is shielded. A cooler for cooling the inhaled air;
A heater for heating the inhaled air;
A shielding member that is provided between the cooler and the heater so that the heater is hidden behind the cooler when viewed from the cooler side, and shields dehumidified water scattered from the cooler to the heater;
A part of the shielding member is configured to move between the maximum heating state and the maximum cooling state, and adjust the air volume of the cooling air from the cooler and the heating air from the heater to control the conditioned air. A vehicle air conditioner comprising a temperature control door for adjusting the temperature of the vehicle. The vehicle air conditioner according to claim 1 or 2,
  A drainage path for discharging the dehumidified water to the outside of the apparatus is provided,
  A vehicle air conditioner, wherein a surface of the temperature control door facing the cooler is formed to be inclined downward in the direction of the drainage path. In the vehicle air conditioner according to any one of claims 1 to 3 ,
The vehicle air conditioner characterized in that at least a portion of the temperature control door facing the heater is formed of a heat insulating material.

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