JPH0396426A - Vehicle air conditioner - Google Patents

Abstract

PURPOSE:To obtain the preference of a passenger whose head part is cool and foot part is warm by making an opening between a heater core and a throttling part to form an auxiliary cool and warm air passage connected in series with an auxiliary cool air passage where warm air and cool air can pass through, and installing a damper for auxiliary passage to open and close the auxiliary cool air passage and the auxiliary cool and warm air passage. CONSTITUTION:Cool air passes through a heater core 12 according to opening of a temperature control damper 14 and is heated, and supplied as warm air. A part of cool air bypassing the heater core 12 is supplied to an upper blow-off opening 30 through an auxiliary cool air passage 18. The other cool air bypassing the core 12 is supplied to the outlet 30 as mixed air of cool air and warm air through a throttling part 20 and a mixing chamber 22, whereas, a part of warm air and a part of cool air are supplied to the outlet 30 through an intake opening 24, an auxiliary cool and warm air passage 26 and the auxiliary cool air passage 18. Therefore, warm air and cool air are supplied to the outlet 30 through three parts of the passage 18, the throttling part 20, the chamber 22, and the passage 26. In this constitution, air volume passing through the passages 18 and 26 is controlled according to the opening of the damper 28 for auxiliary passage.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an automobile air conditioner that adjusts the temperature of blown air by adjusting the opening degree of a temperature control damper.

[Prior Art] Conventionally, the opening degree of a temperature control damper is adjusted to adjust the temperature of the blown air. The type of air conditioner that can be set to various modes, such as pie level mode, which allows you to have a cold head and warm feet, and vent mode, which blows cold air only from the upper outlet, is used. And further 1:. As stated in Japanese Utility Model Publication No. 57-28653, one end of the auxiliary cold air passage is opened on the downstream side of the temperature control damper, and the other end is opened to the upper blowing duct connected to the inlet side of the upper blowing outlet. A known device is equipped with a damper that opens and closes a cold air passage to provide a comfortable state of cold head and warm feet when set to pie level mode.

[Problems to be Solved by the Invention] However, with such conventional automobile air conditioners, for example, when the pie level mode is set, depending on the opening degree of the temperature control damper, there is a large ventilation resistance, and a sufficient amount of air is blown from the upper air outlet. In addition, when setting the vent mode, you may want to increase the air volume from the upper outlet.

Therefore, in such cases, the auxiliary cold air passage can be made larger to ensure sufficient air volume, but it is necessary to make the auxiliary cold air passage larger. There was also the problem that simply providing an auxiliary cold air passage to take in cold air from the upper air outlet would not be able to sufficiently respond to the cold head and warm feet conditions that the occupants preferred. The present invention aims to solve the above problems,
To provide an air conditioner for an automobile capable of obtaining a sufficient amount of air from an upper air outlet without increasing the size of the air conditioner, and capable of keeping the head cold and feet warm according to the occupant's preference.

[Means for Solving the Problems] In order to achieve the above object, the present invention adopts the following configuration as a means for solving the problems. That is, the hot air passing through the heater core and the cold air bypassing the heater core are combined. an upper air outlet and a lower air outlet that have a temperature control damper that adjusts the air volume ratio, and guide the mixed air that has passed through the crest that mixes the hot air and cold air adjusted by the temperature control damper into the vehicle interior; , an air conditioner for an automobile including an auxiliary cold air passage provided on a side of the heater core to guide the cold air that has bypassed the heater core to the upper air outlet; and an auxiliary cold/hot air passage that communicates with the auxiliary cold air passage through which cold air can pass, and an auxiliary passage damper that opens and closes the auxiliary cold air passage and the auxiliary cold/hot air passage. This is the configuration of the air conditioner.

[Function] An automotive air conditioner having the above structure.The temperature control damper adjusts the air volume ratio between the hot air passing through the heater core and the cold air bypassing the heater core according to the opening degree of the temperature control damper. The mixed hot air and cold air adjusted by the above are mixed and the mixed air is guided into the passenger compartment from the upper air outlet and the lower air outlet.Then, the auxiliary cold air passage guides the cold air that has bypassed the heater core to the upper air outlet, and the auxiliary cold air passage leads to the upper air outlet. The air passage supplies cold air and warm air between the heater core and the throttle portion to the upper outlet.

Further, the auxiliary passage damper opens and closes the auxiliary cold air passage and the auxiliary cold and hot air passage to adjust the amount of cold air and hot air supplied to the upper outlet.

[Example] Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 is a schematic exploded view of an automobile air conditioner according to an embodiment of the present invention. 1 is the duct body; duct body 1
An outside air introduction port 2 for introducing air outside the vehicle interior and an inside air introduction port 4 for introducing air inside the vehicle interior are formed in the vehicle. Both inlet ports 2.4F and 4F are designed so that they can be selectively opened and closed by swinging the internal/external air switching damper 6.
On the downstream side, an electric blower 8 is provided that blows air sucked in from either the outside air inlet 2 or the inside air inlet 4.

The duct body on the downstream side of this electric blower 8]
An evaporator 1o is provided to cool and dehumidify the inhaled air.Additional 1:. A heater core 12 whose heat source is engine cooling water (not shown) is provided downstream thereof. In this embodiment, a temperature control damper 1 is installed on the side of the heater core 12.
4 is swingably arranged. This temperature control damper 1
4 (Companion) By operating a temperature control lever (not shown), the damper opening degree is adjusted to adjust the air volume ratio between the warm air passing through the heater core 12 and the cold air bypassing the heater core 12, thereby controlling the temperature of the blown air. is made possible.

The inner part of the duct body 1 on the downstream side of this heater core 12
A partition wall 16 is provided, and the inside of the duct body 1 is partitioned by this partition wall 16.

A part of the cold air that has passed through the evaporator 10 forms an auxiliary cold air passage 18 through which the cool air passes by bypassing the heater core 12.

In addition, a chevron portion 16a is formed in a part of the partition wall 16.
One aperture wall extends from the chevron portion 16a and the duct body 1 to form the aperture portion 20. This aperture part 20
According to the opening degree of the temperature control damper 14, the warm air that has passed through the heater core 12 and the cold air that has bypassed the heater core 12 are mixed, and the mixed air is sent to the mixing chamber 2 in the duct body 1.
12 so that it flows into 2. Tsui Yamagata section 16a
may be flat.

Further 1:. The partition wall 16 between the heater core 12 and the ridged portion 20 is opened, and in this embodiment, a portion of the chevron portion 16a is opened to form an introduction port 24. This introduction port 2
4 (common) The auxiliary cold air passage 18 is connected to the auxiliary cold air passage 18 via the auxiliary cold air passage 26 formed by the chevron portion 16a. It is possible to change the degree of
(iii) An auxiliary passage damper 28 is provided which can change the opening degree of the auxiliary cold/hot air passage 26 from a fully open state to a fully closed state. This auxiliary passage damper 28 (in this embodiment, it is integrated), but it may be configured with two dampers that open and close the auxiliary cold air passage 18 and the auxiliary cold air passage 26, respectively.

The auxiliary cold air passage 20 is connected to the upper air outlet 30 formed in the duct body 1 so as to directly introduce air thereto. This upper blow-off outlet 3011 is connected to the mixing chamber 22 and can be opened and closed by an upper blow-off damper 32. Further, it is connected to each ventilation outlet 36a to 36d that blows air toward the upper body of the occupant in the vehicle interior via the upper outlet 301 and the upper outlet duct 34.

On the other hand, an upper and lower outlet 38 is formed in the duct body 1, and this lower outlet 38 is connected to the mixing chamber 22.
Further, it can be opened and closed by a downward blowing damper 40. Then, the lower air outlet 38 (upper and lower air outlet duct 4
2 to a front seat heat outlet 44 and a rear seat heat outlet 46 which blow out air to the feet of passengers in the vehicle interior.

Furthermore, an upper differential air outlet 48 is formed in the duct body 1, and this differential air outlet 48 is connected to the mixing chamber 22 and can be opened and closed by a differential air outlet damper 50. This differential air outlet 48 {upper side} is connected to a defroster air outlet 54 that blows air out to the windshield of the automobile via a differential air outlet duct 52.

By operating a lever (not shown) or the like, a vent mode can be set in which the upper blow-off damper 32 is placed in an open state and the lower blow-off damper 40 and the differential blow-off damper 50 are placed in a closed state. When this vent mode is set, in this embodiment, the auxiliary cold air passage 18 and the auxiliary cold/hot air passage 26 are fully opened. The degree may be set separately.

In addition, by operating a lever (not shown) or the like, each of the above-mentioned dampers (the upper blow damper 32 and the lower blow damper 4
0 is an open state {2) A pie level mode in which the differential blowing damper 50 is closed can be set.

When this pie level mode is set {Mi Auxiliary passage damper 2
Opening degree of 8 {company Auxiliary cold air passage 18 and auxiliary cold air passage 26
It may be in a fully open state, or it may be configured so that it can be changed continuously or in steps.

Next, the operation of the automotive air conditioner of this embodiment will be explained.

Air is introduced by the electric blower 8 through the outside air inlet 2 or the inside air inlet 4 depending on the switching position of the inside/outside air switching damper 6, and is cooled and dehumidified by passing through the evaporator 10. The cold air that has passed through the evaporator 10 passes through the heater core 12 or bypasses the heater core 12, depending on the opening degree of the temperature control damper 14. The cold air that has passed through the heater core 12 is warmed by the heater core 2 and blown out as warm air. The opening degree of the temperature control damper 14 (the temperature inside the conductor is adjusted to the passenger's preference, and the heater core is adjusted according to the opening degree) 2 The air volume of hot air passing through the heater core 2 and cold air bypassing the heater core 12 The percentage is adjusted.

Then, a lever (not shown) or the like is operated, and the vent mode is set as shown in Figure 2.Temperature Control Damper 1
4 is fully closed, the cold air that has passed through the evaporator 10 bypasses the heater core 12.
A portion of the cold air (passes through the auxiliary cold air passage 18 that is fully open by the auxiliary passage damper 28 and is discharged to the upper air outlet 30.
guided by.

On the other hand, the other part 1 of the cold air goes around the opposite side of the partition wall 16, flows into the mixing chamber 22 (2) via the ridge 20, and is supplied from the mixing chamber 22 to the upper outlet 30. 20, the air flow creates resistance and the air pressure on the upstream side of the throttle section 20 becomes high. Therefore, the flow from the inlet 24 into the auxiliary cold/hot air passage 26 is promoted.
[auxiliary cold air passage] 8 is supplied to the upper air outlet 30.

In this way, the cold air tL is supplied to the upper air outlet 30 from three locations via the auxiliary cold air passage 1B, the ridge portion 20 and the mixing chamber 22, and the auxiliary cold and hot air passage 26. Therefore, the amount of air supplied increases compared to the case where only the auxiliary cold air passage 18 and the mixing chamber 22 are used.

On the other hand, when the vent mode is set 1: When the occupant adjusts the temperature control damper 14 to a predetermined opening degree in order to adjust the temperature inside the vehicle interior to a desired temperature, cold air according to the degree of opening passes through the heater core 12. is heated and supplied as hot air. In addition, a part of the cold air that has bypassed the heater core 12 (Table 1) is supplied to the upper air outlet 30 via the auxiliary cold air passage 18, and another part of the cold air that has bypassed the heater core 12 (Table 1) is supplied to the upper outlet 30 through the auxiliary cold air passage 18. 22 to the upper outlet 30.

When passing through this constriction part 20 1: hot air and cold air are mixed and supplied as mixed air.

Further, a part of the hot air and a part of the cold air are passed through the inlet 24, the auxiliary cold/hot air passage 26, and the auxiliary cold air passage 18 to the upper air outlet 3.
0. At this time, warm air and cold air are mixed in the auxiliary cold air passage 18 and supplied to the upper air outlet 301 .

Fig. 4 Company 1 Auxiliary cold air passage 18 and auxiliary cold air passage 26
Each ventilation outlet 36a to 36 when closed
d is a graph obtained by measuring the temperature according to the opening degree of the temperature control damper 14. Each ventilation outlet 3 at this time
Temperature variation between 6a and 36d {friend temperature control damper 1
When the opening degree of 4 is 5, it is 6.5 degrees and f-. In addition, FIG.
6 is in a closed state, each ventilation outlet 36
8 to 36d is a graph obtained by measuring temperatures according to the opening degree of the temperature control damper 14. At this time, the temperature variation of each ventilation outlet 36a to 36d was 11 degrees when the opening degree of the temperature control damper 14 was 6. In this way, when only the auxiliary cold air passage 18 was opened (Top) The temperature variation of each ventilation outlet 36a to 36d becomes large.

On the other hand, in the case of the present embodiment described above in FIG. It is a graph measured according to the opening degree of No. 14. Each ventilation outlet 36a at this time
Temperature variation of ~36d (y) When the opening degree of the temperature control damper 14 is 6, it is 6.5 degrees, and by providing the auxiliary cold/hot air passage 26, the occurrence of temperature variation can be suppressed.

Next 1: +2 We will explain what happens when the lever not shown is operated and the pie level mode is set. When the pie level mode is set (as shown in FIG. 3, the upper blowout damper 32 and the lower blowout damper 40 are in the open state and the differential blowout damper 50 is in the closed state. At this time, in this embodiment, { The auxiliary passage damper 28 is set to a predetermined opening degree to achieve a predetermined temperature according to the passenger's preference.The temperature control damper 14 is also set to a predetermined opening degree according to the passenger's preference, apart from the pie level mode setting. A predetermined opening degree is set so that a predetermined temperature is achieved.

Cool air flows to the heater core according to the opening degree of the temperature control damper 14]
A portion of the cold air that bypasses the heater core 12 is heated through the heater core 12 and supplied as warm air (the auxiliary cold air passage 1
8 to the upper air outlet 30. Then, the other part of the cold air that bypassed the heater core 12 (the constriction part 2
0. The air is supplied to the upper air outlet 30 via the mixing chamber 22. When passing through the constriction section 20, hot air and cold air are mixed and supplied as mixed air.

Also, at this time, depending on the opening degree of the temperature control damper 14, a portion of the hot air and a portion of the cold air flow into the upper outlet 30 via the inlet 24, the auxiliary cold/hot air passage 26, and the auxiliary cold air passage 18. Supplied. At this time, as described above, when passing through the constriction part 20, the flow is curdled and becomes a resistance, and the constriction part 2
The air pressure on the upstream side of 0 is high. Therefore, inlet 2
4 into the auxiliary cold/hot air passage 26 and is supplied to the upper air outlet 30 via the auxiliary cold air passage 8.

Therefore, hot air and cold air flow through the auxiliary cold air passage 18 and the ridge portion 2.
The air is supplied to the upper air outlet 30 from three locations via the mixing chamber 22 and the auxiliary cold/hot air passage 26. As a result, the amount of air supplied increases compared to the case where only the auxiliary cold air passage 8 and the mixing chamber 22 are used. At this time, the amount of air passing through the auxiliary cold air passage 18 and the auxiliary cold/hot air passage 26 is adjusted according to the opening degree of the auxiliary passage damper 28.

Graph f shown in FIG. , which shows changes in the temperature TU of the air blown from the upper outlet 30 and the temperature TL of the air blown from the lower outlet 38 at that time. In this embodiment, there is a maximum temperature difference of 21 degrees in this case. When the bilevel mode is set on the graph 1 shown in FIG. The opening degree of the temperature control damper 14 was changed from the fully open state to the fully open state, and the changes in the temperature TU of the air blown from the upper outlet 22 and the temperature TL of the air blown from the lower outlet 30 at that time were shown. It is a graph.

In this example, there was a maximum temperature difference of 27 degrees in this case, which was 6 degrees larger than in the state shown in FIG. 7. In contrast, the graph shown in FIG. When setting the repel mode, both the auxiliary cold air passage 18 and the auxiliary cold/hot air passage 26 are fully opened, and the opening degree of the temperature control damper 14 is also changed from the fully open state to the fully open state, and the air blown from the upper air outlet 30 at that time is Temperature TU and lower outlet 38
It is a graph showing the change in the blown air temperature TL from .

In this example, there is a maximum temperature difference of 31 degrees in this case, which is 10 degrees larger than in the state shown in FIG. 1: The temperature difference between when the auxiliary cold and hot air passage 26 is fully closed, that is, when the auxiliary cold and hot air passage 26 is not provided, and when it is fully opened, that is, when the auxiliary cold and hot air passage 26 is provided, is 4. By providing the auxiliary cold/hot air passage 26 with an increased temperature, the amount of air blown from the upper outlet 30 increases. Therefore, the temperature difference between the cold air and the warm air blown from the upper air outlet 30 and the lower air outlet 38 can be changed over a sufficiently wide range, and the ceiling of the vehicle interior can be On the contrary, the area near the floor is sufficiently warm, creating the ideal condition for keeping your head cold and your feet warm.
Although the auxiliary cold/hot air passage 26 was fully opened, the opening degree of the auxiliary passage damper 28 was adjusted according to the passenger's preference.
The amount of air passing through the auxiliary cold air passage 18 and the auxiliary cold air passage 26 can be adjusted. As a result, although the temperature difference that each passenger prefers differs, by being able to vary the temperature difference over a sufficiently wide range, an ideal state of keeping the head cold and feet warm can be obtained with a temperature difference that corresponds to the passenger's preference.

Ugly In this embodiment, a case where cooling is performed using the evaporator 10 is used as an example, but the same implementation is possible even if the cooling is not provided with the evaporator 0.

The present invention is not limited to these embodiments in any way, and may be implemented in various forms without departing from the gist of the present invention.

[Effects of the Invention] As described in detail above, the automotive air conditioner of the present invention can increase the amount of air blown from the upper air outlet by providing an auxiliary cold/hot air passage. When setting vent mode {
The variation in the temperature of the blown air is suppressed by increasing the amount of air blown out from the upper outlet. When the pie level mode is set (by increasing the air volume from the upper outlet,
The temperature difference between the cold air and hot air blown out from the upper and lower air outlets can be varied over a sufficiently wide range, making it ideal for those with cold heads and feet, where the ceiling of the vehicle interior is cold while the floor area is sufficiently warm. The state is obtained. Further, by adjusting the opening degree of the auxiliary cold/hot air passage and the auxiliary cold/hot air passage with the auxiliary passage damper, an ideal state of head cold/foot heat can be obtained with a temperature difference corresponding to the passenger's preference over a wide range.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the deployment of an automotive air conditioner as an embodiment of the present invention. Fig. 2 is a schematic diagram showing the flow when setting the vent mode in this embodiment. Fig. 3 is a diagram showing the pie level mode setting in this embodiment. The diagram showing the flow of time is as follows: Figure 4 is a graph showing the variation in air temperature from the upper outlet when the auxiliary cold air passage and auxiliary cold air passage are closed when vent mode is set, and Figure 5 is a graph when vent mode is set. Figure 6 is a graph showing the variation in temperature of the air blown from the upper outlet when the auxiliary cold air passage is opened and the auxiliary cold and hot air passage is closed. A graph showing the variation in temperature of the air blown from the upper air outlet, Figure 7 shows the air blown from the upper air outlet and the lower air outlet when the auxiliary cold air passage and the auxiliary cold air passage are closed when pie level mode is set. Temperature graph, Figure 8 is a graph of the temperature of the air blown from the upper outlet and lower outlet when the auxiliary cold air passage is opened and the auxiliary cold air passage is closed when the pie level mode is set, and Figure 9 is the pie level mode graph It is a graph of the temperature of the air blown from the upper outlet and the lower outlet when the auxiliary cold air passage and the auxiliary cold air passage are opened at the time of setting. 1... Duct body 10... Evaporator 12... Heater core 14... Temperature control damper 18... Auxiliary cold air passage 20... Throttle part 22
...Mixing chamber 26...Auxiliary cold/hot air passage 2
8... Auxiliary passage damper 30... Upper air outlet 38
...Lower air outlet

Claims (1)

[Scope of Claims] A temperature control damper that adjusts the air volume ratio of warm air passing through the heater core and cold air bypassing the heater core,
an upper outlet and a lower outlet that guide the mixed air that has passed through the throttle section that mixes the hot air and cold air adjusted by the temperature control damper into the vehicle interior; and an upper outlet and a lower outlet that are provided on the side of the heater core and bypass the heater core. In the automotive air conditioner, the vehicle air conditioner includes an auxiliary cold air passage that guides the cooled air to the upper outlet, the air conditioner being open between the heater core and the throttle part and communicating with the auxiliary cold air passage through which the warm air and the cold air can pass. 1. An air conditioner for an automobile, comprising: an auxiliary cold/hot air passage forming an auxiliary cold/hot air passage; and an auxiliary passage damper for opening/closing the auxiliary cold/hot air passage.