JPWO2009075255A1 - Air conditioner for automobile - Google Patents

Abstract

An object of the present invention is to provide an air conditioner for automobiles that can suppress the temperature variation at the temperature-controlled air outlet by improving the air-mixing property and can eliminate the uncomfortable feeling given to the passenger who receives the wind directly from the temperature-controlled air outlet grill in the passenger compartment. And The present invention that achieves this object includes an evaporator 2 and a heater core 3 arranged in a unit case 1, a first air mix space 10 that mixes cool air that has passed through the evaporator 2 and warm air that has passed through the heater core 3, and vent air. In an automotive air conditioner equipped with vent outlets 15L and 15R for blowing out air, the cool air from the evaporator 2 is moved up and down by the mixed air from the first air mix space 10 immediately before the vent outlets 15L and 15R. A second air mix space 11 of a three-layer flow type sandwiched between the two was set.

Description

  The present invention relates to an automotive air conditioner including a temperature-controlled air outlet that mixes cold air that has passed through an evaporator and warm air that has passed through a heater core, and blows out temperature-controlled air obtained by mixing.

  Conventionally, by providing a cool air bypass passage above the passage through which mixed air mixed with cold air and warm air passes and opening the max cool door, the temperature of the vent outlet is made independent of the temperature of the other air outlets. An automotive air conditioner that can be controlled to a low temperature side is known (see, for example, Japanese Patent Laid-Open No. 9-328008).

  However, in the conventional automobile air conditioner, since the air mix space is set by the two-layer flow type of mixed air and cold air at the vent outlet, the mixed air and the cold air are not mixed and the vent air blower is not mixed. There has been a problem that temperature variation occurs in the wind blown out from the exit through the vent duct by the vent blow grill, resulting in an uncomfortable feeling to the occupant.

  The present invention has been made paying attention to the above-mentioned problem, and by suppressing the temperature variation at the temperature-controlled air outlet by improving the air-mixing property, it is given to the passenger who directly receives the wind from the temperature-controlled air outlet grill in the passenger compartment. An object of the present invention is to provide an automotive air conditioner that can eliminate the uncomfortable feeling.

In order to achieve the above object, in the present invention, an evaporator and a heater core arranged in a unit case, an air mix space for mixing the cool air that has passed through the evaporator and the warm air that has passed through the heater core, and the temperature at which the temperature-controlled air is blown out. In an air conditioner for an automobile provided with a wind outlet,
A second air mix space of a three-layer flow type in which the cool air from the evaporator is sandwiched from above and below by the mix air from the air mix space is set immediately before the temperature control air outlet.

Therefore, in the automotive air conditioner of the present invention, in the second air mix space set immediately before the temperature-controlled air outlet, the cold air from the evaporator is changed from above and below by the mix air from the air mix space. It is caught. Even though the distance from the second air mix space to the temperature-controlled air outlet is short, the mixing air in the contact area and the wraparound mixing action are exhibited by the cold air in the middle layer and the mixed air in the upper and lower layers. Mix style mixes in an orderly manner.
In this way, by improving the air mixing property in the second air mixing space of the three-layer flow type, it is possible to obtain a temperature adjustment diagram at the temperature adjusting air outlet where the temperature variation is suppressed to be small. For this reason, even if the occupant directly receives the temperature adjustment air blown from the temperature adjustment air outlet through the temperature adjustment air duct by the temperature adjustment air outlet grille, the upper side of the face is cold and the lower side of the face is warm, for example There is no such a sense of incongruity.
As a result, it is possible to suppress the temperature variation at the temperature-controlled air outlet by improving the air mix, and to eliminate the uncomfortable feeling given to the passenger who receives the wind directly from the temperature-controlled air outlet grill in the passenger compartment.

It is a top view which shows the air conditioning apparatus for motor vehicles of Example 1. FIG. It is a vertical front view by the AA line of FIG. 1 which shows the air conditioning apparatus for motor vehicles of Example 1. FIG. It is a mixed wind passage position vertical side view by the BB line of FIG. 2 which shows the air conditioning apparatus for motor vehicles of Example 1. FIG. It is a cold wind bypass passage position vertical side view by the CC line of FIG. 2 which shows the air conditioning apparatus for motor vehicles of Example 1. FIG. FIG. 5 is an enlarged cross-sectional view of a D part in FIG. 4 illustrating a structure of a vent outlet in the air conditioner for an automobile according to the first embodiment. FIG. 5 is a passage sectional view taken along a section E in FIG. 4 showing a mixed air passage and a cold air bypass passage leading to a vent outlet in the automotive air conditioner of the first embodiment. FIG. 3 is an explanatory diagram of a mixed-air blowing action in the automotive air conditioner of the first embodiment. It is blow-out effect explanatory drawing of the bypass cold wind in the air harmony device for cars of Example 1. It is an air mix action explanatory view by the three layer flow in the vent blower outlet in the air harmony device for vehicles of Example 1. FIG. It is a temperature distribution figure of the simulation result in 15 L of vent outlets in the air conditioning apparatus for motor vehicles of Example 1. FIG. It is a vertical side view which shows an example of the conventional air conditioning apparatus for motor vehicles. It is a temperature distribution figure of the simulation result in the vent blower outlet in the conventional air conditioning apparatus for motor vehicles.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Unit case 2 Evaporator 3 Heater core 4 Max cool door 5 Cool air side mix door 6 Warm air side mix door 7 1st vent door 7a Door shaft 7b Passage opening side door portion 7c Outlet side door portion 8 Second vent door 8a Door shaft 8b Passage opening side door portion 8c Outlet side door portion 9 Differential door 10 First air mix space (air mix space)
11 Second air mix space (second air mix space)
12 cold air bypass passage 12a cold air bypass passage opening 12a 'upper opening end 12a "lower opening end 13 mixed air passages 13a, 13b mixed air passage openings 14L, 14R left and right differential outlets 15L, 15R left and right vent outlets ( Temperature controlled air outlet)
16 Left and right bulkheads

  Hereinafter, the best mode for realizing an air conditioner for automobiles of the present invention will be described based on Example 1 shown in the drawings.

First, the configuration will be described.
FIG. 1 is a plan view illustrating an automotive air conditioner according to a first embodiment. FIG. 2 is a longitudinal front view taken along line AA of FIG. FIG. 3 is a side view of the mixed air passage position longitudinally taken along line BB in FIG. 2 showing the automotive air conditioner of the first embodiment. FIG. 4 is a vertical side view of the cold air bypass passage position taken along line CC of FIG. 2 showing the automotive air conditioner of the first embodiment. FIG. 5 is an enlarged cross-sectional view of a portion D in FIG. 4 illustrating the structure of the vent outlet in the air conditioner for an automobile according to the first embodiment. FIG. 6 is a cross-sectional view taken along line EE in FIG. 4 showing a mixed air passage and a cold air bypass passage leading to a vent outlet in the automotive air conditioner of the first embodiment.

  As shown in FIGS. 1 to 4, the automotive air conditioner of Embodiment 1 includes a unit case 1, an evaporator 2, a heater core 3, a max cool door 4, a cold air side mix door 5, and a warm air side. A mix door 6, a first vent door 7, a second vent door 8, a differential door 9, a first air mix space 10 (air mix space), a second air mix space 11 (second air mix space), The cool air bypass passage 12, the mixed air passage 13, the left and right differential outlets 14 </ b> L and 14 </ b> R, the left and right vent outlets 15 </ b> L and 15 </ b> R (temperature-controlled air outlet), and the left and right partition walls 16 are provided.

  The evaporator 2 is a heat exchanger that is arranged at an upstream position in the unit case 1 and draws heat from the wind sent from the blower unit shown in the figure to generate cold air. In the evaporator 2, a refrigerant circulating in the in-vehicle refrigeration cycle flows.

  The heater core 3 is a heat exchanger that is disposed in the unit case 1 at a position downstream of the evaporator 2 and heats the wind that has passed through the evaporator 2 to produce warm air. In the heater core 3, for example, engine cooling water that is hot water circulates.

  The max cool door 4 is set at an upper position on the outlet side of the evaporator 2 and is opened at the max cool time or when adjusting the vent blowing temperature (adjusting the cool air temperature by mixing with the mix air), and the cool air is supplied to the cool air bypass passage 12. Lead.

  The cold air side mix door 5 is set at the lower side of the max cool door 4 on the outlet side of the evaporator 2 and determines the amount of cold air to be led to the first air mix space 10 according to the door opening.

  The warm air side mix door 6 is set at a passage position from the outlet side of the evaporator 2 to the inlet side of the heater core 3, and determines the amount of warm air guided to the first air mix space 10 by the door opening.

  The first vent door 7 and the second vent door 8 are set at the positions of the left and right vent outlets 15L and 15R for blowing out vent air.

  The differential door 9 is set at the positions of the left and right differential outlets 14L and 14R for blowing the differential air.

  The first air mix space 10 is a space that mixes the cool air that has passed through the evaporator 2 and the cool air side mix door 5, and the warm air that has passed through the heater core 3 and the warm air side mix door 6, and a unit case 1 is formed at a position where cold air and warm air intersect.

  The second air mix space 11 is set at a position immediately before the vent outlets 15L, 15R, and a three-layer flow type in which the cold air from the evaporator 2 is sandwiched from above and below by the mix air from the first air mix space 10 Is an air mix space. Hereinafter, the configuration of the second air mix space 11 will be described in detail.

  As shown in FIG. 5, the second air mix space 11 has a cold air bypass passage opening 12a of the cold air bypass passage 12 sandwiched from above and below at a position immediately before the vent outlets 15L and 15R. 13a and 13b are disposed, and the first vent door 7 and the second vent door 8 are disposed at the extended position of the upper open end 12a ′ and the extended position of the lower open end 12a ″ of the cold air bypass passage opening 12a, respectively. Composed.

  As shown in FIG. 5, the first vent door 7 and the second vent door 8 are respectively provided with passage opening side door portions 7b and 8b and outlet side door portions 7c having predetermined folding angles with respect to the door shafts 7a and 8a. , 8c.

  As shown by the phantom line in FIG. 5, the passage opening side door portions 7b and 8b are in contact with the upper opening end 12a ′ and the lower opening end 12a ″ of the cold air bypass passage opening 12a and When the conditioned air is blown, as shown by the solid line in FIG. 5, the angle is set so that the mixed air is introduced from the mixed air passage openings 13a and 13b (substantially parallel to the flow of the mixed air).

  As shown by the phantom line in FIG. 5, the outlet side door portions 7c and 8c are in contact with the upper inner surface 15a and the lower inner surface 15b of the vent outlets 15L and 15R, and at the time of temperature controlled air blowing, As shown by the solid line in FIG. 5, the angle is set so that the cold air is sandwiched in a nozzle shape from above and below by the mixed air.

  As shown in FIG. 4, the cold air bypass passage 12 leading to the cold air bypass passage opening 12a bypasses the mixed air passages 13 and 13 from the cold air passing through the max cool door 4 to the vent outlets 15L and 15R. It is a passage set to go. And as shown in FIG. 6, it sets independently from the mix wind path 13 and 13 so that the mix wind path 13 and 13 which goes to the differential blower outlets 14L and 14R may be bypassed. The cold air bypass passage 12 is defined by the first partition wall 17 and the second partition wall 18 so that the mixed wind passages 13 and 13 guide the mixed air from the first air mix space 10 to the second air mix space 11. Independent setting.

  As shown in FIG. 3, the mixed air passage 13 leading to the mixed air passage openings 13 a and 13 b is a first air mix that combines the cold air passing through the cold air side mix door 5 and the warm air passing through the warm air side mix door 6. It mixes in the space 10, and it sets so that it may go to the said vent blower outlet 15L, 15R from this 1st air mix space 10 as it is.

Next, the operation will be described.
The operation of the air conditioning apparatus for an automobile according to the first embodiment is divided into “mix wind blowing action”, “bypass cold wind blowing action”, “air mixing action by three-layer flow”, and “comparison action of outlet temperature distribution”. To do.

[Mix-style blowing action]
FIG. 7 is an explanatory view of the mixed-air blowing action in the automotive air conditioner of the first embodiment.
The cold air passing through the evaporator 2 and the cool air side mix door 5 and the warm air passing from the evaporator 2 through the warm air side mix door 6 and the heater core 3 are mixed in the first air mix space 10 as shown in FIG. . The mixed air mixed in the first air mix space 10 is divided into upper and lower portions in the mixed air passage 13, the upper mixed air reaches the mixed air passage opening 13a, and the lower mixed air is mixed with the mixed air passage. It reaches the opening 13b. And it receives an air mix effect with cold air in the 2nd air mix space 11, and goes to vent outlets 15L and 15R.

[Bypass cold air blowing action]
FIG. 8 is an explanatory view of a bypass cold air blowing action in the automotive air conditioner of the first embodiment.
As shown in FIGS. 6 and 8, the cool air passing through the evaporator 2 and the max cool door 4 passes through the cool air bypass passage 12 set independently from the mix air passages 13 and 13, and the mixed air passage openings 13a and 13b. To the cold air bypass passage opening 12a. And in the 2nd air mix space 11, it receives an air mix effect | action with a mix wind, and goes to vent blower outlet 15L, 15R.
At this time, the cold air bypass passage 12 is defined by the first partition wall 17 and the second partition wall 18, and is set independently from the mixed air passages 13 and 13 that guide the mixed air to the second air mix space 11. For this reason, the cold air that has passed through the evaporator 2 and the max cool door 4 is neatly arranged in the second air mix space 11 without being mixed with the mixed air in the route from the evaporator 2 to the second air mix space 11. Led to.

[Air mix action by three-layer flow]
FIG. 9 is an explanatory diagram of an air mix action by a three-layer flow at the vent outlet in the automotive air conditioner of the first embodiment.
In the automotive air conditioner of the first embodiment, in the second air mix space 11 set immediately before the vent outlets 15L and 15R, as shown in FIG. The cold air reaching the bypass passage opening 12a is sandwiched from above and below by the mixed air passing through the mix air passage 13 and reaching the mix air passage openings 13a and 13b. Although the distance from the second air mix space 11 to the vent outlets 15L and 15R is short, as shown in FIG. 9, the second air mix space 11 is caused by the cold air in the middle layer and the mixed air in the upper and lower layers. Shows a mixing action and a wraparound mixing action in the contact area, and cool air and mixed air are mixed in an orderly manner.

[Contrast effect of outlet temperature distribution]
For example, as shown in FIG. 11, a conventional automobile air conditioner sets an air mix space by a two-layer flow type of mixed air and cold air at a vent outlet. For this reason, the mixed air and the cold air cannot be mixed, and temperature variation occurs in the air blown out from the vent air outlet through the vent duct by the vent air outlet grille, which makes the passenger feel uncomfortable. Incidentally, FIG. 12 is a temperature distribution diagram of a simulation result at a vent outlet in a conventional automobile air conditioner. As apparent from FIG. 12, the upper side of the vent outlet is greatly affected by the cold air, and the temperature is as low as 5 ° C. to 9 ° C., whereas the lower side of the vent outlet is greatly affected by the mixed air. The temperature is as high as 12 ° C to 18 ° C. Therefore, when the occupant directly receives the vent air blown from the vent outlet through the vent duct and into the passenger compartment by the vent outlet grille, the upper side of the face is cold and the lower side of the face is warm. become.

On the other hand, the air conditioner for automobiles according to the first embodiment is a vent whose temperature variation is suppressed to be small by improving the air mixing property in the three-layer flow type second air mixing space 11 as described above. Temperature control diagrams at the air outlets 15L and 15R can be obtained.
Incidentally, FIG. 10 is a temperature distribution diagram of a simulation result at the vent outlet 15L in the automotive air conditioner of the first embodiment. As is apparent from FIG. 10, the temperature of the central region of the vent outlet 15L is 7 ° C. to 10 ° C., and the temperature gradually increases from 12 ° C. to 15 ° C. from the central region to the outer region. Go. Therefore, even if the occupant directly receives the vent air blown from the vent air outlets 15L and 15R through the vent duct into the vehicle interior by the vent air outlet grille, the temperature balance that the entire face receives can be maintained. There is no sense of incongruity.

Next, the effect will be described.
In the automotive air conditioner of Embodiment 1, the effects listed below can be obtained.

  (1) The evaporator 2 and the heater core 3 arranged in the unit case 1, the first air mix space 10 for mixing the cool air that has passed through the evaporator 2 and the warm air that has passed through the heater core 3, and the temperature at which the temperature-controlled air is blown out In an automotive air conditioner equipped with air conditioning outlets (vent air outlets 15L, 15R), cool air from the evaporator 2 is supplied from the first air mix space 10 to a position immediately before the temperature air conditioning outlet. The second air mix space 11 of the three laminar flow type that is sandwiched from above and below by the mixed wind is set, so that the air variation improves the temperature variation at the temperature controlled air outlet and the wind from the temperature controlled air outlet grill in the passenger compartment The feeling of discomfort given to passengers who receive the car directly can be resolved.

  (2) The passage for guiding the cold air from the evaporator 2 to the second air mix space 11 is a cold air bypass passage 12 defined by the first partition wall 17 and the second partition wall 18, and the cold air bypass passage 12 is Since the mixed air from the first air mix space 10 is set independently from the mixed air passages 13 and 13 that guide the mixed air from the first air mix space 10 to the second air mix space 11, the mixing is performed along the route from the evaporator 2 to the second air mix space 11. The cold air from the evaporator 2 can be led to the second air mix space 11 without being mixed with the wind.

  (3) The temperature-controlled air outlets are vent outlets 15L and 15R for blowing out vent air, and the second air mix space 11 is located immediately before the vent outlets 15L and 15R with the cold air bypass passage 12 The mixed air passage openings 13a and 13b are disposed with the cold air bypass passage opening 12a sandwiched from above and below, and the extended position of the upper opening end 12a ′ and the extended position of the lower opening end 12a ″ of the cold air bypass passage opening 12a. Since the first vent door 7 and the second vent door 8 are respectively arranged in the vent mode, when the vent mode is selected, the temperature variation at the vent outlets 15L and 15R is suppressed by the three-layer flow control by both the vent doors 7 and 8. be able to.

  (4) The first vent door 7 and the second vent door 8 have passage opening side door portions 7b and 8b and outlet side door portions 7c and 8c having predetermined folding angles with respect to the door shafts 7a and 8a, respectively. The passage opening side door portions 7b and 8b are in contact with the upper opening end 12a ′ and the lower opening end 12a ″ of the cold air bypass passage opening 12a at the time of max cool, and when the temperature-controlled air is blown out, The angle is set to introduce mixed air from the passage openings 13a, 13b, and the outlet side door portions 7c, 8c are in contact with the upper inner surface 15a and the lower inner surface 15b of the vent outlets 15L, 15R at the time of max school, When the temperature control air is blown out, the angle is set so that the cold air is sandwiched from above and below by the mixed air. By crossing the mixed wind toward the cold wind from above and below at the time, it is possible to achieve a high airmic property with a short wind moving distance.

  (5) The cold air bypass passage 12 leading to the cold air bypass passage opening 12a bypasses the cold air that has passed through the max cool door 4 so as to bypass the mixed air passage 13 toward the differential outlets 14L and 14R. Since it is set independently from the passage 13, when air mixing is performed in a three-layer flow in the second air mix space 11, the second air mix space 11 does not receive a mixing action in the middle route, and the second air mix space 11 Cold air that has passed through the door 4 can be guided.

  (6) The mixed-air passage 13 leading to the mixed-air passage openings 13a and 13b is configured so that the cold air passing through the cold-air-side mix door 5 and the warm air passing through the warm-air-side mix door 6 are generated in the first air mix space 10. Mixing and setting was made so as to go directly from the first air mix space 10 to the vent outlets 15L and 15R. The mixed air mixed by the first air mix space 10 can be guided to the second air mix space 11 without receiving the mixing action.

  As mentioned above, although the air conditioner for motor vehicles of this invention has been demonstrated based on Example 1, it is not restricted to this Example 1 about a concrete structure, The invention which concerns on each claim of a claim Design changes and additions are permitted without departing from the gist of the present invention.

  In Example 1, the example of the vent blower outlet was shown as a temperature control wind blower. However, as long as it is a temperature-controlled air outlet other than the vent outlet, for example, the foot outlet may be a temperature-controlled air outlet.

  In Example 1, the example which arrange | positions the two vent doors 7 and 8 in the 2nd air mix space 11 was shown. However, one vent door may be arranged in the second air mix space, or three vent doors may be arranged in the second air mix space.

  In short, as long as the second air mix space of the three-layer flow type in which the cool air from the evaporator is sandwiched from above and below by the mix air from the air mix space at the position immediately before the temperature control air outlet, Example 1 It is not limited to.

  In the first embodiment, an example of application to an air conditioner for an automobile that performs air conditioning of a front seat of the automobile has been shown. In short, an automobile air equipped with an evaporator and a heater core arranged in the unit case, an air mix space for mixing the cool air that has passed through the evaporator and the warm air that has passed through the heater core, and a temperature-controlled air outlet that blows out the temperature-controlled air Any harmony device can be applied.

Claims (6)

Automotive air provided with an evaporator and a heater core disposed in a unit case, an air mix space for mixing the cool air that has passed through the evaporator and the warm air that has passed through the heater core, and a temperature-controlled air outlet that blows out the temperature-controlled air In the harmony device,
A second air mix space of a three-layer flow type in which the cool air from the evaporator is sandwiched from above and below by the mix air from the air mix space is set immediately before the temperature control air outlet. Air conditioner. In the air conditioning apparatus for motor vehicles described in Claim 1,
The passage for guiding the cold air from the evaporator to the second air mix space is a cold air bypass passage defined by the first partition and the second partition,
The automotive air conditioner, wherein the cold air bypass passage is set independently of a mixed air passage that guides mixed air from the air mix space to a second air mix space. The automotive air conditioner according to claim 2,
The temperature-controlled air outlet is a vent outlet that blows out vent air,
The second air mix space has a mixed air passage opening disposed between the upper and lower sides of the cold air bypass passage at a position immediately before the vent outlet, and the cold air bypass passage opening. An automotive air conditioner comprising a first vent door and a second vent door disposed at an extended position of an upper open end and an extended position of a lower open end, respectively. The automotive air conditioner according to claim 3,
The first vent door and the second vent door each have a passage opening side door portion and a blowout side door portion having a predetermined folding angle with respect to the door shaft,
The passage opening side door portion is in contact with the upper opening end and the lower opening end of the cold air bypass passage opening at the time of max school, and the angle at which the mixed air is introduced from the mixing air passage opening at the time of temperature-controlled air blowing Set as
The air outlet side door portion is in contact with the upper inner surface and the lower inner surface of the vent air outlet at the time of max school, and at the time of temperature-controlled air blowing, the angle is set so that the cold air is sandwiched from above and below by the mixed air. Air conditioner for automobiles. In the air conditioning apparatus for motor vehicles described in any one of Claim 2 thru | or 4,
The cold air bypass passage leading to the cold air bypass passage opening is configured to bypass the cold air passing through the max cool door so as to bypass the mixed air passage toward the differential outlet, and is set independently from the mixed air passage. Air conditioner for automobiles. The automotive air conditioner according to any one of claims 2 to 5,
The mix air passage leading to the opening of the mix air passage mixes the cold air passing through the cold air side mix door and the warm air passing through the warm air side mix door in the air mix space, and directly vents the vent blow from the air mix space. An automotive air conditioner set to go to an exit.

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