JP3996698B2 - Air conditioner for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle air conditioner.
[0002]
[Prior art]
Conventionally, a vehicle air conditioner having the following configuration has been proposed as means for uniformly mixing hot air from a hot air passage and cold air from a cold air passage (see, for example, Japanese Patent Publication No. 4-60843). ).
[0003]
That is, in this vehicle air conditioner, as shown in FIG. 8, the position of the auxiliary damper 101 provided separately from the mix damper 100 is indicated by the solid line in a state where the mix damper 100 is rotated to the position a indicated by the solid line. By turning to b, the hot air obtained by heating with the heater core 103 of the hot air passage 102 and the cold air obtained by passing through the cold air passage 104 without heating can be mixed. And the opening area of the opening part 105 is narrowly formed so that this mixing can be performed uniformly.
[0004]
Further, when the hot air passage 102 is fully closed by the mix damper 100, the auxiliary damper 101 is rotated to a position indicated by a one-dot chain line in FIG. 8 so that the cold air passes only through the cold air passage 104 and then blows into the vehicle. To be.
[0005]
Further, when the cool air passage 104 is fully closed by the mix damper 100, the auxiliary damper 101 is rotated to the position indicated by the alternate long and short dash line in FIG. 8, and the hot air passes only through the hot air passage 102 and is heated by the heater core 103. After that, the air is blown into the vehicle.
[0006]
[Problems to be solved by the invention]
By the way, as shown by the solid line in FIG. 9, the opening area of the opening 105 and the air mixing property have a relationship that uniform mixing becomes more difficult as the opening area becomes larger. On the other hand, the opening area of the opening 105 and the ventilation resistance have a relationship that the ventilation resistance increases as the opening area becomes smaller, as indicated by a dashed line in FIG. In other words, there is a conflicting relationship in which the air resistance increases if an attempt is made to obtain excellent air mixing properties, and the air mixing property deteriorates if an attempt is made to reduce the air resistance.
[0007]
In the vehicle air conditioner, the same flow path (opening) flows in the case where hot air and cold air are mixed and blown into the vehicle, and in the case where only hot air is blown into the vehicle. In other words, the conventional vehicle air conditioner has a structure that cannot satisfy both excellent air mixing performance and small ventilation resistance at the same time. In this case, although it is conceivable to configure a part of the wall surface constituting the opening 105 with a damper, the structure becomes complicated and the cost is increased, for example, it becomes necessary to link the mix damper 100 and the damper. Is inevitable.
[0008]
Therefore, an object of the present invention is to provide a vehicle air conditioner that can be manufactured at low cost with a simple configuration capable of uniformly mixing hot air and cold air and reducing ventilation resistance.
[0009]
[Means for Solving the Problems]
As a means for solving the above problems, the present invention provides:
The inside air or outside air introduced into the air conditioning unit is cooled and dehumidified by an evaporator, divided by a mix damper, heated by a heater core disposed in the hot air passage, and passed through the cold air passage while leaving the other as it is. In a vehicle air conditioner that mixes both and blows air into the vehicle through the air distribution chamber,
A first opening and closing plate for opening and closing the outlet of the hot air passage ;
A second opening and closing plate for opening and closing the outlet of the cold air passage ;
A second mix damper consisting of
Wherein each closing plate, adjacent so the opening is formed, respectively, and warm air from the warm air passage, in which so as to mix the cold air from the cold air passage.
[0010]
At the time of maximum heating or maximum cooling, the second mix damper can turn the hot air passage or the outlet of the cold air passage so that the outlet of the hot air passage is fully open, thereby suppressing the ventilation resistance. In addition, when adjusting the temperature to a desired temperature, the opening and closing plates of the second mix damper are positioned at the outlet of the hot air passage and the cold air passage, so that the hot air and the cold air are effective through the adjacent openings. To mix.
[0011]
It is preferable to extend the guide wall from the edge of the opening formed in each opening / closing plate of the second mix damper so as to improve the mixing performance of hot air and cold air in the space surrounded by the guide wall. .
[0012]
Wherein among the exit of warm air passage or cool air passage may be provided a bypass damper for opening and closing a part or all of at least one.
[0013]
A sub- damper having a bypass passage communicating with the upstream and downstream sides of at least one of the outlets of the hot air passage or the cold air passage, and the outlet of the bypass passage formed in a damper disposed in the air distribution chamber It may be more openable.
[0014]
With these configurations, even if the second mix damper that uniformly mixes hot air and cold air is adopted, for example, as in the bi-level mode, it is necessary to make the air temperature different between the head and feet of the occupant. If there is, warm air or cold air can be blown directly into the vehicle by the bypass damper or bypass passage.
The damper is a heat damper,
In the bi-level mode, the opening of the heat outlet is halved by the heat damper, the outlet of the bypass passage is opened by the sub damper,
In vent mode, the heat damper closes the heat outlet, the sub damper closes the outlet of the bypass passage,
In the heat mode, it is preferable that the heat blower outlet is fully opened by the heat damper, and the outlet of the bypass passage is closed by the sub damper.
Further, it is preferable that the outlets of the hot air passage and the cold air passage are closed by the both opening and closing plates after the air flow rate is reduced by reducing the difference between the in-vehicle temperature and the target temperature.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0016]
FIG. 1 is a schematic view of a vehicle air conditioner according to the present embodiment. In this vehicle air conditioner, an intake door 2, a blower fan 3, an evaporator 4, a first mix damper 5, a second mix damper 6, A heater core 7 is arranged, and a downstream side thereof is an air distribution chamber 8.
[0017]
The structure on the side of the air distribution chamber shown in FIG. 1 is an outline, and is actually configured as shown in FIG.
[0018]
The intake door 2 is configured to be able to introduce the outside air or the inside air into the air conditioning unit 1 by closing either the inside air introduction port 9 or the outside air introduction port 10 depending on the rotation position thereof.
[0019]
The blower fan 3 is rotated by driving the blower motor 11 with power supplied from an alternator or a battery (not shown).
[0020]
The evaporator 4 cools and dehumidifies the air passing through the outside (total air flowing in the air conditioning unit) by evaporating when the refrigerant circulating in the refrigeration cycle (not shown) flows inside.
[0021]
The 1st mix damper 5 changes the ratio of the air through which the air cooled and dehumidified with the evaporator 4 passes the warm air path 12 or the cool air path 13 by the rotation position.
[0022]
The heater core 7 is disposed in the hot air passage 12 and heats air passing through the external hot air passage 12 by flowing engine cooling water inside.
[0023]
As shown in FIG. 2, the second mix damper 6 integrates the first and second opening / closing plates 15a, 15b so as to form a predetermined angle with the shaft portion 14, and the shaft portion 14 is connected to each opening / closing plate 15a, 15b. Openings 16a and 16b are formed so as to be adjacent to each other. Guide walls 17 are provided at the upper and lower edges of the openings 16a and 16b. The space sandwiched by the guide walls 17 from the openings 16a and 16b facilitates mixing of hot air and cold air flowing through the openings 16a and 16b, and increases the rigidity of the second mix damper 6. Also plays. As shown in FIG. 3, the second mix damper 6 opens and closes a hot air outlet 18 formed at the boundary between the hot air passage 12 and the air distribution chamber 8 by a first opening / closing plate 15a, and the second opening / closing plate 15b. Thus, the cold air outlet 19 formed at the boundary between the cold air passage 13 and the air distribution chamber 8 is opened and closed. When the first opening / closing plate 15a is located at the hot air outlet 18 and the second opening / closing plate 15b is located at the cold air outlet 19, the adjacent first and second openings 16a, 16b can mix the cold air that is hot air. It has become. In addition, although the said guide wall 17 was comprised with a pair of wall surface which opposes an up-down direction, if a guide wall is provided also in a side edge, it will become possible to improve air mix property further.
[0024]
The air distribution chamber 8 is provided with a heat air outlet 20, a vent air outlet 21, and a differential air outlet 22, and the opening degree is adjusted by a heat damper 23, a vent damper 24, and a differential damper 25, respectively.
[0025]
Next, the operation of the vehicle air conditioner having the above configuration will be described.
[0026]
When the blower motor 11 is driven, the blower fan 3 is rotated, and the inside air or the outside air is introduced into the air conditioning unit 1. The introduced air is cooled and dehumidified by the evaporator 4 and diverted by the first mix damper 5.
[0027]
In the case of maximum heating in which the first mix damper 5 is rotated to the position indicated by the solid line in FIG. 3 and the cool air passage 13 is fully closed, the second mix damper 6 is rotated to the position indicated by the solid line in FIG. The air outlet 18 is fully opened. Moreover, the heat damper 23 rotates and only the heat outlet 20 is opened. Thereby, all the air dehumidified by the evaporator 4 passes through the warm air passage 12, is heated by the heater core 7, and is blown into the vehicle from the air distribution chamber 8 through the heat outlet 20. Also in this case, since a desired cross-sectional area can be ensured over the entire flow path, the interior of the vehicle can be heated with a desired air flow while suppressing ventilation resistance.
[0028]
In the case of maximum cooling in which the first mix damper 5 is rotated to the position indicated by the two-dot chain line in FIG. 3 to fully close the hot air passage 12, the second mix damper 6 is the same as in the case of the maximum heating. 3 is rotated to a position indicated by a solid line 3 so that the cold air outlet 19 is fully opened. Further, the vent damper 24 rotates to open only the vent outlet 21. Thereby, all the air cooled and dehumidified by the evaporator 4 passes through the air distribution chamber 8 from the cold air passage 13 and is blown into the vehicle through the vent outlet 21. In this case, since the cold air outlet 19 is fully open and a desired cross-sectional area can be ensured over the entire flow path, it is possible to suppress the ventilation resistance and cool the interior of the vehicle with a desired air flow rate.
[0029]
Furthermore, for example, when the first mix damper 5 is located at the position indicated by the solid line in FIG. 4, that is, when the temperature is adjusted to a desired temperature and blown into the vehicle, the hot air outlet 18 and the cold air outlet 19 are provided with the second mix. The open / close plates 15a and 15b of the damper 6 are located respectively. Thereby, the warm air passage 12, the cold air passage 13, and the air distribution chamber 8 communicate with each other through the openings 16a and 16b. Since the openings 16a and 16b are provided adjacent to each other, the hot air from the hot air passage 12 and the cold air from the cold air passage 13 are uniformly mixed and blown into the vehicle through the corresponding outlet. The
[0030]
Therefore, for example, when air is blown into the vehicle from a plurality of openings (not shown) via the vent outlet 21 in the vent mode, air having a uniform temperature can be blown from any of the openings. As a result, such a problem that the occupant feels uncomfortable, such as a difference in air temperature between the driver's seat and the passenger's seat, is eliminated.
[0031]
In addition, although ventilation resistance becomes large by passing the opening parts 16a and 16b with a small opening area, changing the rotation position of the 1st mix damper 5 and adjusting ventilation temperature adjusts maximum cooling or maximum heating. This is after the air flow rate is reduced by reducing the difference between the in-vehicle temperature and the target temperature. That is, when blowing the temperature-controlled air into the vehicle, the amount of blowing is not so much required, so the reduction in the amount of blowing due to the increase in ventilation resistance is not a problem.
[0032]
Incidentally, the wall surfaces constituting the hot air outlet 18 and the cold air outlet 19 may be constituted by a bypass damper 26 as shown in FIG. The bypass damper 26 is configured to change the rotation position according to the air blowing mode. For example, when the wall surface constituting the cold air outlet 19 is constituted by the bypass damper 26, the second mix damper 6 is located at the hot air outlet 18 and the cold air outlet 19, and the vent air outlet 21 and the heat air outlet 20 are in the bi-level mode. If both are open, the bypass damper 26 is rotated, so that the cool air passing through the cool air passage 13 can be blown directly from the vent outlet 21. Thereby, it is possible to make a difference in the air blowing temperature between the heat outlet 20 and the vent outlet 21 (see the alternate long and short dash line in FIG. 5), supplying cool air to the passenger's head and supplying warm air to the feet. And a comfortable air-conditioning state can be obtained.
[0033]
The bypass damper 26 may be constituted by a part of the wall surface, may be constituted by the entire wall surface, or may be formed only on one of the wall surfaces.
[0034]
Further, the upstream and downstream sides of the outlet of the hot air passage 12 or the cold air passage 13 may be communicated by a bypass passage 27 as shown in FIG. In this case, the outlet 27 a of the bypass passage 27 can be opened and closed by a sub-damper 28 integrated with any damper provided in the air distribution chamber 8. For example, when the sub damper 28 is provided in the heat damper 23, an opening 28a is formed in the sub damper 28, and the outlet 27a of the bypass passage 27 is opened and closed by the opening 28a. In the bi-level mode, the opening degree of the heat outlet 20 by the heat damper 23 is halved, the opening 28a is located at the outlet 27a, and the cold air passing through the cold air passage 13 passes through the bypass passage 27 and the vent air outlet 21. The air is blown directly into the car. Thereby, it becomes possible to make a difference in blowing temperature between the heat outlet 20 and the vent outlet 21. In the vent mode, the heat damper 23 closes the heat outlet 20, and in the heat mode, the heat damper 23 fully opens the heat outlet 20, and in any case, the outlet 27 a is closed by the sub damper 28.
[0035]
【The invention's effect】
As is clear from the above description, according to the vehicle air conditioner according to the present invention, the second mix damper having the adjacent opening is provided, so the cold air and the hot air are uniformly mixed in the opening. In addition, at the time of maximum cooling or maximum heating, the outlet of the cold air passage or the hot air passage can be fully opened to suppress the ventilation resistance and obtain a desired air flow rate.
[0036]
In addition, since the guide wall is extended from the edge of the opening, it is possible to increase the space area where cold air and hot air can be mixed, and it is possible not only to mix more uniformly, but also to reinforce. As a role to increase the rigidity.
[0037]
In addition, since the wall surface constituting the outlet of the hot air passage and the cold air passage is configured with a bypass damper, or a bypass passage that communicates the upstream and downstream sides of each outlet is formed, when it is necessary to blow into the vehicle from a plurality of locations, The air temperature from each outlet can be made different. Thereby, for example, in the bi-level mode, it is possible to supply cool air to the head of the occupant and supply warm air to the feet.
[Brief description of the drawings]
FIG. 1 is a schematic plan sectional view showing an air conditioning unit of a vehicle air conditioner according to an embodiment.
FIG. 2 is a perspective view of a second mix damper shown in FIG.
FIG. 3 is a cross-sectional view showing the vicinity of the air distribution chamber.
FIG. 4 is a cross-sectional view showing the vicinity of the air distribution chamber.
FIG. 5 is a graph showing a relationship between an air conditioning mode and a blowing temperature.
FIG. 6 is a perspective view of the vicinity of a second mix damper according to another embodiment.
FIG. 7 is a perspective view of the vicinity of a second mix damper according to another embodiment.
FIG. 8 is a cross-sectional view showing an air conditioning unit of a vehicle air conditioner according to a conventional example.
FIG. 9 is a graph showing the relationship between the flow path area and air mixability or ventilation resistance.
[Explanation of symbols]
1: Air conditioning unit 4: Evaporator 5: First mix damper 6: Second mix damper 7: Heater core 12: Hot air passage 13: Cold air passage 15: Opening / closing plate 16: Opening portion 17: Guide wall 18: Hot air outlet 19: Cold air outlet 26: Bypass damper 27: Bypass passage 28: Sub-damper

Claims (6)

The inside air or outside air introduced into the air conditioning unit is cooled and dehumidified by an evaporator, divided by a mix damper, heated by a heater core disposed in a hot air passage, and passed through the cold air passage while leaving the other as it is. In a vehicle air conditioner that mixes both and blows air into the vehicle through the air distribution chamber,
A first opening and closing plate for opening and closing the outlet of the hot air passage ;
A second opening / closing plate for opening and closing the outlet of the cold air passage ;
A second mix damper consisting of
Wherein each closing plate, an opening is formed respectively so that adjacent, the warm air from the warm air passage, air conditioning system is characterized in that so as to mix the cold air from the cold air passage. A guide wall is extended from the edge of the opening formed in each opening / closing plate of the second mix damper, and the mixing performance of hot air and cold air in the space surrounded by the guide wall is enhanced . The vehicle air conditioner according to claim 1. Wherein among the exit of warm air passage or cool air passage, air-conditioning system according to claim 1 or 2, characterized in that a bypass damper for opening and closing a part or all of at least one. A sub- damper having a bypass passage communicating with the upstream and downstream sides of at least one of the outlets of the hot air passage or the cold air passage, and the outlet of the bypass passage formed in a damper disposed in the air distribution chamber The vehicle air conditioner according to claim 1, wherein the vehicle air conditioner is more openable and closable.   The damper is a heat damper,
  In the bi-level mode, the opening of the heat outlet is halved by the heat damper, the outlet of the bypass passage is opened by the sub damper,
  In vent mode, the heat damper closes the heat outlet, the sub damper closes the outlet of the bypass passage,
  5. The vehicle air conditioner according to claim 4, wherein, in a heat mode, the heat blower outlet is fully opened by the heat damper, and the outlet of the bypass passage is closed by the sub damper.   2. The outlets of the hot air passage and the cold air passage are closed by the both opening and closing plates after the air flow rate is reduced by reducing the difference between the in-vehicle temperature and the target temperature. The vehicle air conditioner according to any one of claims 1 to 5.

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