JP2001105833A - Vehicular airconditioning unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular airconditioning unit with a favorable mixing performance of a cool wind and hot wind while making the unit compact. SOLUTION: This unit case 2 is provided with a ventilator 3, a lowering passage 6A for lowering and guiding the air sent out from the ventilator 3 along the case wall surface 2A of a car room 14 side, U turn passage 6B for guiding the air to the case wall surface 2C while communicating with the lower part of the lowering passage 6A and a rising passage 6C, whose lower end is communicated to the U turn passage 6B and whose upper end is communicated to the upper release ports 4, 5 of the upper part of the unit case 2, for rising and guiding the air passed the U turn passage 6B along the case wall surface 2C of an engine room 16 side. A heat exchanger 7 for cooling, slide door device 9 and heat exchanger 8 for heating are arranged in the U turn passage 6B. In the slide door device 9, the air passed the heat exchanger 7 for cooling is passed to the heat exchanger 8 for heating and hot wind and cool wind are mixed and harmonized in the air mix chamber 40 of the down streamside of the heat exchanger 8 for heating.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioning unit mainly used for automobiles.

[0002]

2. Description of the Related Art Conventionally, an air conditioning unit for a vehicle in which a heat exchanger for cooling, a heat exchanger for heating, and a blower are integrated is disposed in the center of a vehicle width direction behind an engine room and in a front part of a vehicle compartment. There is. As such an air conditioning unit for a vehicle, one shown in FIG. 14 disclosed in Japanese Patent Application Laid-Open No. 9-267620 is known.

In this vehicle air conditioning unit 100,
As shown in the figure, the air blown from the blower 101 is cooled, for example, by a cooling heat exchanger 1 for cooling the passing air.
02 and a heating heat exchanger 103 for warming the passing air, respectively, and are mixed again so as to be mixed and adjusted to a predetermined blowing temperature. Here, the conditioned air rises along the unit case wall surface on the vehicle room 104 side, and is then blown out from the indoor air outlet 105 into the vehicle room 104. Note that, in the figure, reference numeral 106 denotes an engine room.

However, in such an air conditioning unit for a vehicle, the conditioned air flow is blown into the vehicle compartment 104 immediately after rising along the wall of the unit case on the vehicle compartment 104 side. The flow of the raised air is a flow that is forcibly bent rightward in FIG. For this reason, the ventilation resistance up to the cabin outlet 105 is increased, leading to a reduction in ventilation efficiency. Also,
When the indoor outlet 105 is a ventilator outlet, since it is located at the center and both the left and right sides, the conditioned air is branched right and left at the center where the outlet is located, and flows toward both sides. For this reason, there has been a problem that the blowout wind is unbalanced in that the central portion is stronger than both sides. To solve this problem, measures have been taken to balance the two sides by restricting the flow toward the center.However, this complicates the structure and increases the ventilation resistance. Therefore, there is a problem that the maximum air volume is reduced because the air flow is restricted. For this reason, if the blowing air volume of the blower 101 is increased in order to compensate for the decrease in the maximum air volume, the air volume noise becomes loud, silence cannot be maintained, and there is a problem that quality is impaired.

[0005] Further, when the vehicle air conditioning unit 100 having such a structure is assembled to a vehicle body in a state where the cabin 104 side of the air conditioning unit 100 is previously attached to a steering fixing member, for example, due to the own weight of the vehicle air conditioning unit. As a result, the unit case of the vehicle air conditioning unit is likely to be affected by distortion or the like on the cabin 104 side. As shown in FIG. 14, in the conventional air conditioning unit for a vehicle, the doors 107, 108 and the like are concentrated on the vehicle compartment 104 side, so that these doors 107 and 108 are adversely affected by the distortion of the unit case. There is a possibility that the opening and closing operations may be hindered.

To solve the above-mentioned problems of the conventional air conditioning unit for a vehicle, the present applicant has disclosed Japanese Patent Application No.
Japanese Patent No. 285774 proposes an air conditioning unit 200 for a vehicle having a structure having a ventilation passage as shown in FIG.
In the figure, reference numeral 201 denotes an engine room, and 202 denotes a vehicle room. This vehicle air conditioning unit 200 includes a blower 204 and air from the blower 204 in a unit case 203 located in front of a vehicle room 202 behind an engine room 201.
03 along the wall of the engine room 201
An air conditioning passage 205 that rises along the wall surface of the unit case 203 on the side and flows toward the upper release port communicating with the indoor air outlet, and a cooling heat exchanger is provided in the air conditioning passage 205. 206 and a heat exchanger 207 for heating are arranged. In the figure, reference numeral 209 denotes a cooling heat exchanger 2
6 shows an air mixing chamber where the cold air passing through the heat exchanger 06 and the hot air passing through the heating heat exchanger 207 merge.
Thereby, the air blown out from the blower 204 is, for example, cooled by the heat exchanger 206 and the heat exchanger 207 by heating.
Through the air mixing chamber 209, and is blown into the vehicle compartment from the ventilator outlet 208 and the like. At this time, the conditioned air is supplied to the unit case 203 on the engine room 201 side.
After rising along the wall of the ventilator outlet 208
As a result, a long approach path to the outlet is ensured, so that a continuous and reasonable flow with low airflow resistance can be obtained.

In the example shown in FIG. 15, the cooling heat exchanger 206 is held in a position inclined toward the engine room 201 and the heating heat exchanger 207 is connected to the cooling heat exchanger 2.
06 in combination with a T-shape to achieve a smooth air flow path and a compact unit. In the figure, reference numeral 210 denotes an air mixing door for controlling the amount of cold air and warm air from the cooling heat exchanger 206 to the air mixing chamber 209, and reference numeral 211 denotes a foot air passage entrance for blowing air to the feet in the vehicle compartment. Reference numeral 212 denotes an opening / closing door for opening / closing a foot ventilation path entrance 211 and opening / closing a portion where the air mix chamber 209 communicates with the indoor air outlet side.
The steering fixing member held by the side is shown.
In this way, by adopting a structure in which the vehicle air conditioning unit 200 is held by the steering fixing member 213 on the wall of the unit case 203 on the vehicle compartment 202 side, each door for opening and closing the air flow path is moved from the unit holding position. The structure is separated so that each door is not affected by the distortion of the unit case.

[0008]

However, in the above reference example, the air mix door 210 and the opening / closing door 21 are not provided.
2 is close to each other, and since each door has a plate-like door structure, there is a problem that the opening / closing space between the air mix door 210 and the opening / closing door 212 becomes large, which hinders downsizing. When the opening / closing space is increased as described above, there is a problem that the volume of the air mix chamber 209 for mixing the cool air and the warm air is reduced. In particular, as shown in FIG.
In the case of the bi-level (combined) mode in which the opening 0 and the opening / closing door 212 are each opened at the intermediate position, the substantial air mixing space in the air mixing chamber 209 is narrowed, so that the cooling heat exchanger 206 to the air mixing door 210
, The hot air H passing through the heating heat exchanger 207 passes along the lower surfaces of the air mixing door 210 and the opening / closing door 212, and passes through the foot air passage. The laminar flow is led to the inlet 211.
As described above, since the cold air C and the hot air H are not easily mixed properly, for example, the ventilator outlet 2
In the upper outlet such as 08, the temperature of the blown air is too low,
At the foot outlet, the temperature tends to be too high. FIG.
Means full cool (F / C) state and full hot (F / H)
It is a figure which shows the foot side temperature and the ventilator side temperature which change between states. As shown in the figure, when no measures are taken, the vehicle temperature conditioning unit 200 of the reference example is used.
In this case, there is a problem that the difference between the temperature of the air blown out from the foot side and the temperature of the air blown out from the ventilator side is excessively large at 45 to 50 ° C.

Therefore, the present invention has been made in view of such problems, and achieves a compact unit while achieving a good air-conditioning unit for a vehicle having good mixing performance of cold air and hot air. The purpose is to provide.

[0010]

According to the first aspect of the present invention,
A blower, a descending passage for descending and guiding the air sent from the blower along the case wall on the vehicle interior side in a unit case disposed behind the engine room and in a front part of the vehicle interior, and a descending passage. A lower passage communicating with a lower portion of the unit case and guiding the air toward the case wall on the engine room side; a lower end communicating with the lower passage and an upper end communicating with an upper opening formed in the upper part of the unit case. A rising passage that rises and guides the air that has passed through the lower passage along the case wall on the engine room side,
In the lower passage, a cooling heat exchanger, a sliding door device, and a heating heat exchanger are arranged in order from the upstream side to the downstream side, and the slide door device is configured such that air passing through the cooling heat exchanger is provided. Is variably passed through the upstream side and the downstream side of the heating heat exchanger, and the hot air and the cold air are mixed and harmonized in a region of the lower passage downstream of the heating heat exchanger. It is characterized by the following.

According to the first aspect of the present invention, the air blown out from the blower passes through the descending passage and descends along the case wall on the passenger compartment side. The air that has descended the descending passage passes through the cooling heat exchanger and is cooled. The air that has passed through the cooling heat exchanger is sent by the sliding door device directly to the downstream of the heating heat exchanger located downstream, and to the upstream of the heating heat exchanger. And divided into For this reason, at the downstream position of the heating heat exchanger in the lower passage, the cool air that has passed only through the slide door device and the hot air that has passed through the heating heat exchanger and have been heated are mixed and air-conditioned. . The air mixed and conditioned on the downstream side of the heating heat exchanger passing through the lower part rises through an ascending passage located on the engine room side of the unit case, and flows into an upper opening formed in the upper part of the unit case. It can be sent out. Also, the ascending passage is located on the engine room side, away from the cabin,
For example, it is possible to suppress an operation sound of an opening / closing door for performing opening / closing control of the upper release port from being transmitted to the vehicle interior. Furthermore, in the case of a structure in which the unit case is supported by, for example, a steering fixing member or the like at the position inside the vehicle cabin, since the opening / closing door mechanism of the upper opening is located away from the support portion, the unit case is generated near the support portion. It is possible to suppress the adverse effect of low-cost distortion from affecting the opening and closing door mechanism.

According to a second aspect of the present invention, there is provided the air conditioning unit for a vehicle according to the first aspect, wherein the cooling heat exchanger is installed in the lower passage so as to stand substantially vertically. The sliding door device is installed so as to overlap with the cooling heat exchanger, and the heating heat exchanger is laid through the sliding door device so as to be substantially orthogonal to a vertically intermediate portion of the cooling heat exchanger. And the cooling heat exchanger and the heating heat exchanger are arranged so as to form a substantially T-shape in the horizontal direction in the lower passage.

Therefore, the invention according to claim 2 can reduce the size of the upper and lower arrangements of the cooling heat exchanger and the heating heat exchanger in addition to the operation of the invention of claim 1, and can reduce the overall size of the unit. Is reduced in size. Further, since the cooling heat exchanger is installed upright in the lower passage, the cross-sectional area of the flow passage of the air passing through the cooling heat exchanger can be made closer to the cross-sectional area of the lower passage, and the air circulation Resistance can be reduced. As a result, an increase in wind pressure can be suppressed, and there is an effect of suppressing generation of noise due to blowing. Furthermore, since the heat exchanger for heating is arranged so as to be substantially T-shaped together with the heat exchanger for cooling in the lower passage with respect to the heat exchanger for cooling standing in the lower passage, It is possible to increase the volume of an area (air mixing chamber) for mixing the warm air that has passed through the exchanger and the cool air that has passed only through the slide door device and has been sent downstream of the heating heat exchanger. . In other words, since the sliding door device performs the gate operation of passing the air passing through the cooling heat exchanger to the heating heat exchanger, the sliding direction of the sliding door is substantially the same as the vertical direction in which the cooling heat exchanger stands. Match. For this reason, the sliding door does not interfere with the downstream area of the heating heat exchanger, which is an area for mixing the cold air and the hot air, and the volume of this area can be set to be constant and large.

[0014] Further, the invention according to claim 3 is based on claim 2.
The vehicle air conditioning unit according to claim 1, wherein the slide door device includes an air passage frame disposed so as to cover an entire cross section in a direction substantially orthogonal to a flow direction of the lower passage, and an upper and lower side along the air passage frame. It is characterized by comprising a slide plate capable of sliding movement, and a slide drive transmitting means for vertically sliding the slide plate with respect to the air passing frame.

Therefore, according to the third aspect of the present invention, in addition to the function of the second aspect of the present invention, the air passing through the cooling heat exchanger is disposed by arranging the air passage frame over the entire cross section of the lower passage. In addition, it is possible to set a large flow path cross-sectional area of the air passing through the heating heat exchanger. For this reason, it is possible to reduce the air flow resistance and to suppress the generation of noise such as blowing noise.

According to a fourth aspect of the present invention, in the vehicle air conditioner according to the third aspect, the slide plate divides the lower passage into an upper passage and a lower passage, and further comprises the air passage. The ratio of the cross-sectional area of the upper passage to the cross-sectional area of the lower passage is changed by performing an elevating operation along the passing frame.

Therefore, according to the fourth aspect of the present invention, in addition to the operation of the third aspect of the present invention, the passage disconnection between the upper passage and the lower passage of the lower passage depends on the position of the slide plate with respect to the air passage frame. The area can be changed, and the flow ratio of each of the cool air and the warm air can be controlled.
Further, even if the slide plate slides with respect to the air passage frame, the cross-sectional area of the air passing through the entire slide door device can be kept constant, thereby preventing the output efficiency of the air conditioning unit for a vehicle from lowering. can do.
Needless to say, the strength of the blower can be easily adjusted by adjusting the output of the blower.

Further, the invention according to claim 5 is the same as the invention according to claim 3.
5. The air conditioning unit for a vehicle according to claim 4, wherein the air passage frame and the slide plate are curved so as to expand toward a downstream side of the lower passage, and the slide plate and the cooling heat are curved. A gap is formed between the heat exchanger and the exchanger to reduce wind pressure.

Therefore, in the fifth aspect of the invention, in addition to the functions of the third and fourth aspects, the air passage frame and the slide plate constituting the slide door device are expanded toward the downstream side. With the curved shape, a gap of a predetermined volume can be secured between the cooling heat exchanger and the slide plate, and the cool air blown from the cooling heat exchanger side hits the slide plate to reduce pressure loss. Can be suppressed. For this reason, it is possible to increase the gap between the cooling heat exchanger and the heating heat exchanger disposed downstream of the cooling heat exchanger.For example, the main flow of air passing through the cooling heat exchanger in the full cool mode is reduced. It is possible to suppress the bias toward the upper passage of the cooling heat exchanger and to suppress an increase in the wind speed downstream of the cooling heat exchanger. As a result, splashing of condensed water adhering to the surface of the cooling heat exchanger and generation of noise can be prevented.

According to a sixth aspect of the present invention, there is provided the air conditioning unit for a vehicle according to the fifth aspect, wherein the lower passage is provided on a downstream side of the heating heat exchanger and a foot outlet in the vehicle compartment. An opening for communicating with the foot outlet passage is formed on a lower wall surface of the lower passage, and an opening / closing door for opening and closing both the inlet for the foot outlet passage and the lower passage is located on the ascending passage side from the inlet for the foot outlet passage. And is pivotally supported by a pivot shaft.

Therefore, according to the sixth aspect of the invention, in addition to the function of the fifth aspect of the present invention, the foot outlet passage inlet is communicated with the lower wall surface of the lower passage, so that the foot outlet passage is located at a position higher than the foot outlet passage inlet. By pivoting the opening / closing door, depending on the angle of the opening / closing door, air is entirely sent to the ascending passage side, air is sent only to the foot outlet, warm air is sent to the foot outlet, and the upper opening port is opened. It is possible to set various air blowing modes for sending cold air to the side.

Further, the invention according to claim 7 provides the invention according to claim 6
In the air conditioning unit for a vehicle according to the above, in a state where the slide plate is moved to an uppermost position of the air passage frame, air passing through the cooling heat exchanger is only upstream of the heating heat exchanger. In the state where the slide plate is moved to the lowermost position of the air passing frame, the air passing through the cooling heat exchanger is prevented from flowing out to the upstream side of the heating heat exchanger. And the heating heat exchanger is set to be lower than a straight line connecting the lower end of the air passage of the cooling heat exchanger and the pivot.

Therefore, according to the seventh aspect of the invention, in addition to the operation of the sixth aspect, the full hot mode can be set by positioning the slide plate at the highest position of the air passage frame. Further, by setting the slide plate at the lowest position of the air passage frame, the full cool mode can be set. In this full cool mode, the heating heat exchanger is set to be located below the straight line connecting the lower end of the air passage of the cooling heat exchanger and the pivot of the opening / closing door, The cool air that has passed through the upper opening of the air passage frame can flow smoothly without the presence of the heating heat exchanger obstructing the circulation. For this reason, the air distribution at the time of full cooling can be improved.

According to an eighth aspect of the present invention, in the vehicle air conditioner unit according to any one of the third to seventh aspects, the air passage frame has passed through the heating heat exchanger. A guide plate is provided for guiding a part of the air to the upper wall surface of the lower passage.

Therefore, the invention according to claim 8 is characterized in that, in addition to the effects of the inventions according to claims 3 to 7, since the air passing frame is provided with the guide plate, the temperature passing through the heat exchanger for heating is increased. A part of the wind is guided to the upper wall surface of the lower passage by the guide plate portion, and the warm air is guided to the ascending passage side along the wall surface. For example, in the case of a so-called bi-level mode, in which cold air is sent to the upper opening and the warm air is sent to the foot outlet, the temperature of the cool air sent to the upper opening is suppressed from excessively decreasing, and the foot outlet is closed. Excessive rise in the temperature of the hot air sent to the vehicle can be suppressed, and comfort in the vehicle cabin can be improved.

[0026]

According to the first aspect of the present invention, at the downstream position of the heating heat exchanger, the cold air that has passed only through the sliding door device and the hot air that has passed through the heating heat exchanger and have been heated. By using a sliding door device, an appropriate volume can be secured in a region where the air is mixed, and there is an effect that air conditioning can be favorably performed. Also, the air mixed and conditioned on the downstream side of the heating heat exchanger in the lower passage rises through an ascending passage located in the unit case on the engine room side, and is released upward in the upper part of the unit case. The air can be sent to the mouth, and the passage distance of the mixed air can be increased. For example, the effect of mixing the cool air and the hot air in the air sent to the ventilator outlet or the like can be enhanced. Further, since the ascending passage is located on the engine room side away from the cabin, there is an effect of suppressing the operation sound of, for example, an opening / closing door for controlling opening / closing of the upper release port from being transmitted to the cabin. Further, according to the first aspect of the present invention, when the unit case has a structure in which the unit case is supported by the steering fixing member or the like at the position inside the vehicle compartment, the opening / closing door mechanism of the upper opening is separated from the supporting portion. Since it is located at the position, there is an effect of suppressing the adverse effect of cheap distortion generated near the support portion from affecting the opening / closing door mechanism and the like.

According to the second aspect of the invention, in addition to the effect of the first aspect, the cross-sectional area of the air passage passing through the cooling heat exchanger can be made closer to the cross-sectional area of the lower passage. This has the effect of reducing air flow resistance. As a result,
An increase in wind pressure can be suppressed, and an effect of suppressing generation of noise due to blowing can be achieved. In addition, the volume of an area (air mixing chamber) for mixing warm air that has passed through the heat exchanger for heating and cool air that has passed only through the slide door device and that has been sent downstream of the heat exchanger for heating is increased. It is possible,
This has the effect of improving the mixing efficiency of cold and hot air.

Further, the size of the upper and lower arrangement of the cooling heat exchanger and the heating heat exchanger can be reduced, and the size of the entire unit can be reduced.

According to the third aspect of the present invention, in addition to the effect of the second aspect of the present invention, the air passing through the cooling heat exchanger is disposed by arranging the air passage frame over the entire cross section of the lower passage. In addition, it is possible to set a large flow path cross-sectional area of the air passing through the heating heat exchanger. This has the effect of reducing air flow resistance and suppressing the generation of noise such as blowing noise.

According to the fourth aspect of the invention, in addition to the effect of the third aspect of the present invention, the disconnection between the upper passage and the lower passage of the lower passage depends on the position of the slide plate with respect to the air passage frame. The area can be changed, the flow ratio of each of the cool air and the warm air can be controlled, and there is an effect of enhancing the temperature control function. Further, even if the slide plate slides with respect to the air passage frame, the cross-sectional area of the air passing through the entire slide door device can be kept constant, thereby preventing the output efficiency of the air conditioning unit for a vehicle from lowering. Has the effect of doing

According to the fifth aspect of the present invention, in addition to the effects of the third and fourth aspects, the air passage frame and the slide plate constituting the slide door device are expanded toward the downstream side. With the curved shape, a gap of a predetermined volume can be secured between the cooling heat exchanger and the slide plate, and the cool air blown from the cooling heat exchanger side hits the slide plate to reduce pressure loss. It has the effect of suppressing. According to the invention described in claim 5, for example, in the full cool mode, the main flow of the air passing through the cooling heat exchanger can be suppressed from being biased to the upper passage of the cooling heat exchanger, and the downstream of the cooling heat exchanger can be suppressed. This has the effect of suppressing an increase in the wind speed on the side, and has the effect of preventing splashing of condensed water adhering to the surface of the cooling heat exchanger and generation of noise.

According to the invention described in claim 6, in addition to the effect of the invention described in claim 5, there is an effect that various air blowing modes can be set.

According to the invention of claim 7, in addition to the effect of the invention of claim 6, in the full cool mode,
Since the heat exchanger for heating is set below the straight line connecting the upper end of the slide plate and the pivot of the opening and closing door, the cool air that has passed through the upper opening of the air passage frame is It can flow smoothly without the presence of the heating heat exchanger obstructing the flow. For this reason, there is an effect of improving the air distribution at the time of full cooling.

According to the invention described in claim 8, claims 3 to
In addition to the effect of the invention according to claim 7, for example, in the case of a so-called bi-level mode, in which cold air is sent to the upper release port side and warm air is sent to the foot outlet side, the cool air sent to the upper release port is It is possible to suppress an excessive decrease in the temperature and to suppress an excessive increase in the temperature of the warm air sent to the foot outlet side, thereby improving the comfort in the vehicle compartment.

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of an air conditioning unit for a vehicle according to the present invention will be described below using embodiments shown in the drawings.

In FIG. 1, reference numeral 1 denotes an air conditioning unit for a vehicle, and reference numeral 2 denotes a unit case.

The unit case 2 has a shape that can be separated left and right by a fastening screw or the like. FIG. 2 is a perspective view showing a half part of the unit case 2 separated into right and left.
FIG. 3 is a perspective view showing the external appearance of the entire unit case 2. Inside the unit case 2, a blower (blower) 3 as a main component, an air conditioning passage 6 for guiding air sent from the blower 3 toward upper opening ports 4, 5 described below, A cooling heat exchanger (evaporator) 7 and a heating heat exchanger (heat core) 8 arranged in the air conditioning passage 6, and a cooling heat exchanger 7 arranged downstream of the cooling heat exchanger 7. Door device 9 through which the air passing through the air passes without exception, and the cooling heat exchanger 7
And the opening / closing door 1 disposed downstream of the heating heat exchanger 8
0, the opening / closing door 1 arranged at the last part of the air conditioning passage 6
1 is provided.

The blower 3 is arranged in an arcuate housing 12 provided above the unit case 2 and is rotated by a drive motor (not shown).

The housing 12 has an inlet 13 for taking air into the housing 12 by rotation of the blower 3.
And an air outlet 15 are formed.

The air-conditioning passage 6 communicates with the air outlet 15 of the housing 12 so that air blown out from the air outlet 15 is supplied to the passenger compartment 1.
A down passage 6A that guides down along the side 4, a U-turn passage 6B as a lower passage that guides the descended air toward the engine room 16 and makes a U-turn, and a U-turn passage 6B.
And an ascending passage 6C for guiding the air U-turned toward the upper opening ports 4, 5.

The descending passage 6A of the air conditioning passage 6 is formed so as to be surrounded by the case wall surface 2A on the passenger compartment side of the unit case 2 and the left and right side walls 17, 17 (shown in FIGS. 2 and 3) of the unit case 2. Have been. The U-turn passage 6B is formed between the case bottom wall 2B of the unit case 2 and the left and right side walls 17,17.
It is formed surrounded by. The ascending passage 6C is formed by the case wall 2C on the engine room 16 side of the unit case 2, the left and right side walls 17, 17 and the housing 1 formed in an arc shape.
2 and is formed so as to be surrounded by the back surface.

The cooling heat exchanger 7 and the heating heat exchanger 8 are connected to the descending passage 6A of the air conditioning passage 6 and the U-turn passage 6B.
The cooling heat exchanger 7 is provided on the upstream side, and the heating heat exchanger 8 is provided on the downstream side.

The cooling heat exchanger 7 is composed of a refrigerant pipe through which the refrigerant flows and a number of fins (all are not shown). The cooling heat exchanger 7 is supported by upper and lower support brackets 18 provided in the unit case 2 as shown in FIG. 2, and is inclined forward by a predetermined angle toward the engine room 16 side. It has an inclined posture. The inclination angle of the cooling heat exchanger 7 is set in a range of about 0 to 30 degrees with respect to the vertical direction, and particularly, a forward inclination posture of about 20 degrees is preferable. With such an angle setting, the air from the air outlet 15 passes between the fins of the cooling heat exchanger 7 through the descending passage 2A, and an efficient flow is ensured. Is performed and cooled.

The cooling heat exchanger 7 communicates with a compressor, a condenser and an expansion valve (not shown) so that the refrigerant discharged from the compressor passes through the condenser and the expansion valve and becomes a cooling evaporator. A refrigeration cycle that returns from the heat exchanger 7 to the compressor again is configured.

The heating heat exchanger 8 is, as shown in FIG.
Lower end of air blowing area of cooling heat exchanger 7 and door 1
0, which is located below a straight line connecting the pivot shaft 10A to the front and rear support brackets 1 and is arranged to take a substantially horizontal posture.
9 and 19 are supported. More specifically, the heating heat exchanger 8 is connected to the upper end of the slide plate 21 and the opening / closing door 10 when a sliding door device 9 described later is in a full cool mode.
Are arranged below a straight line connecting the pivot shaft 10A to the pivot shaft 10A. The attitude angle of the heating heat exchanger 8 is desirably an angle that rises in a range of about 10 degrees from the substantially horizontal direction to the upstream side. By taking such a posture, as shown in FIG. 1, the cooling heat exchanger 7 and the heating heat exchanger 8 have a substantially horizontal T-shaped layout structure, and the vertical dimension of the unit case 2 The shape is reduced.

The heating heat exchanger 8 is configured to allow heated water heated by an engine (not shown) to flow therethrough. When air passes through the heat exchanger body, heat is exchanged and heated. It has become so.

Next, the structure of the slide door device 9 will be described with reference to FIGS. The sliding door device 9 includes a rectangular air passing frame (hereinafter, simply referred to as a frame) 2.
0 and a slide plate 2 slidable on the frame 20
1, a drive shaft 22, and a rotation drive unit (not shown) for driving the drive shaft 22 to rotate.

As shown in FIG. 4, the frame 20 has a pair of frame side plates 23 and 23 formed by arcs and chords each having a shape obtained by cutting a circle with a chord. 23 are arranged on both sides in the width direction w to face each other. In the center of each frame side plate 23, a bearing opening 23A is opened. Further, a pair of slide guide grooves 23B, 23B having a substantially arc shape are formed on surfaces of the frame side plate portions 23, 23 facing each other along an arc edge. The pair of slide guide grooves 23B, 23B is formed along the arc-shaped edge as described above, and is separated at the center of the frame side plate portion 23. Further, these frame side plate portions 23, 23
Are parallel to each other with the bearing opening 23A interposed therebetween, and slide guide grooves 23B, 23
Slide pin insertion grooves 23C, 23C communicating with B are formed.

The distance between the frame side plates 23, 23 is set substantially equal to the width of the air passage area of the cooling heat exchanger 7. These frame side plates 23, 23
Are opposed to each other by a frame horizontal frame portion 24,
24. In addition, these frame side plate portions 2
A guide plate portion 2 extending along the arcuate edges of the arcs 3 and 23 from the edge toward the inside facing the inside with a width of a predetermined dimension.
5, 25 are formed. In addition, the frame horizontal frame 2
The central portions in the width direction w of 4 and 24 are connected by a central guide plate portion 26 that is curved in the same manner as the guide plate portion 25.

Further, the central portions of the guide plates 25, 25 and the central guide plate 26 in the vertical direction h (indicated by an arrow in FIG. 4) are connected by a reinforcing horizontal plate 27. As a result,
The opening formed of the curved surface surrounded by the frame lateral frame portions 24, 24 and the guide plate portions 25, 25 is the central guide plate portion 2.
6 and the reinforcing horizontal plate 27, and are divided into two cross-shaped upper openings 28 </ b> A,
8A and two lower openings 28B, 28B located below the frame 20 are formed.

The slide plate 21 is connected to the frame 20 described above.
It is formed of a rectangular plate that is curved in the same manner as the degree of curvature of the curved opening surface, and is disposed inside the curved opening surface of the frame 20. Further, slide pins 29 projecting outward in the width direction w are integrally formed at upper and lower ends of both side edges in the width direction w of the slide plate 21. On the surface of each slide pin 29, a slide cylinder 29A made of a material that is easy to slide on the inner wall of the slide guide groove 23B of the frame side plate portion 23.
Is covered. In addition, the rack teeth 30 are formed along the side edges on the curved inner surfaces of both side edges in the width direction w of the slide plate 21.
Is engraved. The dimension of the slide plate 21 in the width direction w is a pair of the frame side plate portions 23 of the frame 20.
The distance is set substantially the same as the distance between them. The dimension of the slide plate 21 in the up-down direction h is set slightly longer than half of the guide plate portion 25 of the frame 20, and when the slide plate 21 is mounted on the frame 20, the pair of upper openings 28 </ b> A , 28A and a pair of lower openings 28B,
8B is set so that either one of them can be completely closed or opened.

The length of the drive shaft 22 is set substantially equal to the length of the slide plate 21 in the width direction w. At both ends of the drive shaft 22, a pinion gear 3
Each of the rotary cylinders 32 formed with 1 is mounted. Outside the rotary cylinder 32, a cylinder shaft 32 </ b> A having a shorter diameter than the pinion gear 31 is provided to protrude coaxially with the pinion gear 31. The cylindrical shaft 32 </ b> A is formed at the center of the frame side plate 23 of the frame 20.
It is rotatably supported by 3A. A connecting groove 32B is formed on the end face of the cylindrical shaft 32A so as to be connected to a rotation driving means (not shown) to transmit the rotation driving force. FIG. 5 is a perspective view showing a state where the slide door device 9 is configured by assembling the frame 20, the slide plate 21, and the drive shaft 22.

As shown in FIGS. 1 and 2, the sliding door device 9 having the above-described structure is provided with the support brackets 18, 1 in the unit case 2 for mounting the cooling heat exchanger 7.
8, door support brackets 33, 33 formed integrally with each other.
It is attached to. In the slide door device 9, the curved and protruding side faces the downstream side, and the upper opening 28
A and 28A are arranged and mounted such that the lower openings 28B and 28B are located below and the lower openings 28B and 28B are located below. With the slide door device 9 mounted in the unit case 2 in this manner, the rotary cylinder 32 mounted on the end of the drive shaft 22
The rotation transmission connecting portion (not shown) of the rotation driving means is connected to the connection concave groove 32B, and the rotation of the rotary cylinder 32 is enabled by controlling the rotation driving means.

The upper openings 4 and 5 are arranged in a concentrated manner on the case wall 2C on the engine room 16 side and the upper wall 2D continuing from the case wall 2C. Upper wall 2
The upper opening port 5 provided in D is a vent port, and the upper opening port 4 provided in the case wall 2C on the engine room 16 side is a defroster port. An opening / closing door 11 is provided between the upper opening ports 4 and 5 to switch and control the upper opening ports 4 and 5 alternately.

Further, the upper opening port 5 serving as a vent port has
As shown in FIG. 6, a ventilator duct 3 having indoor air outlets 34C, 34L, 34R at the center and both left and right sides.
4 are connected. As shown in FIG.
, The distances to the indoor air outlets 34C, 34L, 34R, particularly the distances to the indoor air outlets 34C can be made relatively long.
It is possible to make air flow almost uniformly toward L and 34R. On the other hand, an upper opening 4 serving as a defroster port
Is connected to a defroster duct 36 for blowing air toward a windshield 35.

Further, in FIG. 1, reference numeral 37 denotes a foot opening serving as a foot outlet passage entrance for sending air to the foot, and reference numeral 38 denotes a foot opening.
Indicates a drain pool. The opening and closing of the foot opening 37 is controlled by the opening and closing door 10. The drain reservoir 38 is partitioned by a partition plate 39, and has a structure that is not directly affected by air passing through the cooling heat exchanger 7. A drain port (not shown) is provided at the bottom of the drain reservoir 38.

In the air conditioning unit 1 for a vehicle configured as described above, the air blown from the blower 3 passes through the cooling heat exchanger 7 and the heating heat exchanger 8 to be cooled or heated. The mixture is mixed in the air mixing chamber indicated by reference numeral 40 in FIG. The conditioned air is blown into the passenger compartment 14 by controlling the opening and closing of each of the opening and closing doors 10 and 11.

In these series of operations, in the case of ventilator blowing, the conditioned air is supplied to the engine room 16.
When ascending along the ascending passage 6C on the side, the air flows along the back surface of the arc-shaped (curved) housing 12, and a smooth flow toward the indoor outlets 34C, 34L, 34R is obtained. Moreover, as a result of ensuring a long approaching distance of the air to the indoor outlet 34C, a continuous and smooth flow with small airflow resistance can be produced as shown by the arrow a in FIG. Outlets 34C, 34
Air can be blown from the L and 34R substantially evenly.

The opening / closing door 11 is provided in the engine room 1
Since it is located on the sixth side, there is an advantage that the opening and closing sound transmitted into the vehicle interior 14 is reduced. Moreover, the vehicle air conditioning unit 1 can be assembled to the steering fixing member 41 in advance by using the steering fixing member 41 as shown in FIG. In this case, since the casing 14 side of the unit case 2 is supported by the steering fixing member 41, the mounting portion of the opening and closing door 11 is far from the supporting point,
Even if distortion occurs in the unit case 2 near the support point, the influence of the distortion is not easily transmitted to the opening / closing door 11, and the opening / closing door 1
1 can be maintained smoothly.

Next, the operation and operation of the sliding door device 9 and the opening / closing door 10 for each mode will be described.

First, as shown in FIG. 7, when the vehicle air conditioner unit 1 is in the full cool mode, the slide plate 21 is completely lowered in the slide door device 9, and the lower opening 28B formed in the frame 20 is removed. Reference numeral 28B denotes a state where the slide plate 21 is completely closed. In order to move the slide plate 21, the above-described rotation driving means is driven to transmit the rotation to the drive shaft 22, and the pinion gear 31 is rotated. Moves. In this case, it is assumed that the opening / closing door 10 has the foot opening 37 closed. At this time, the air blown from the blower 3 side (indicated by a thick arrow in the figure) descends through the descending passage 6A, passes through the cooling heat exchanger 7, and is cooled. The air cooled by the cooling heat exchanger 7 (indicated by solid arrows in the figure) flows through the air mix chamber 40 to the ascending passage 6C. As described above, since the heating heat exchanger 8 is located below the straight line connecting the lower end of the air passage of the cooling heat exchanger 7 and the pivot 10A of the opening and closing door 10, the heating heat exchanger 8 The lower end of the cool air that has passed through the upper openings 28A, 28A can smoothly flow toward the upward passage 6C without hitting an obstacle. Therefore, the cool air downstream of the cooling heat exchanger 7 is
The ventilation resistance is reduced, and the generation of noise can be suppressed. Furthermore, since there is no obstacle to the cool air that has passed through the cooling heat exchanger 7, it is possible to suppress the generation of the turbulent flow that is drawn into the heating heat exchanger 8 side. As a result, entrainment of hot air in the heating heat exchanger 8 can be suppressed, and an increase in the blow-out temperature can be suppressed.

When the sliding door 21 is lowered and the opening / closing door 10 is half-opened, cool air is blown to the upper opening ports 4 and 5 via the ascending passage 6C and also to the foot opening 37 side. Can be blown.

Next, as shown in FIG. 8, a case where the slide plate 21 of the slide door device 9 is located at the intermediate position and the opening / closing door 10 closes the foot opening 37 will be described. In this case, the air sent from the blower 3 is cooled by passing through the cooling heat exchanger 7 and cooled (solid arrow).
Becomes This cold air passes above and below the slide plate 21 respectively. The cold air that has passed above the slide plate 21 (upper openings 28A, 28A) is blown into the air mix chamber 40 as it is. On the other hand, the cool air that has passed under the slide plate 21 (the lower openings 28B, 28B) passes through the heating heat exchanger 8 and becomes hot air (indicated by a broken arrow in FIG. 8). It is blown out and mixes with the cool air that has passed above the slide plate 21. In the present embodiment, since the slide door device 9 is provided as described above, the volume of the air mix chamber 40 can be set to be large. Has the effect of reducing the passage resistance of the wire. When the opening / closing door 10 opens the foot opening 37 in this state, air mixed appropriately in the air mix chamber 40 is introduced into the foot opening 37 and blown to the foot outlet.

Here, the case of the bi-level mode in which the sliding plate 21 of the sliding door device 9 is located at the intermediate position and the opening / closing door 10 is located at the intermediate position as shown in FIG. 9 will be described. In such a bi-level mode, the air sent from the blower 3 passes through the cooling heat exchanger 7 and the cool air passes through the upper and lower sides of the slide plate 21 respectively. The cold air that has passed under the slide plate 21 passes through the heating heat exchanger 8 and becomes hot air. The cool air that has passed through the upper openings 28A, 28A on the upper side of the slide plate 21 is sent out in a laminar state toward the upward passage 6C. Most of the warm air that has passed through the heating heat exchanger 8 is
Is introduced into the foot opening 37 by the rectifying action of As shown in FIG. 9, a part of the hot air is supplied to the guide plate 2 of the frame 20.
5, mixed with the cool air along the central guide plate portion 26. FIG.
0 is a perspective explanatory view showing this state, and shows a state in which warm air from the heating heat exchanger 8 is guided to the ascending passage 6C side along the guide plate 25 and the central guide plate 26. As described above, in the present embodiment, the cold air and the hot air are not completely separated from each other, but have an action of mixing a part of the hot air with the cold air. It is possible to prevent the difference between the temperature of the blown air and the air blown from the foot outlet from becoming too large. FIG. 11 is a diagram showing the difference between the foot temperature and the ventilator temperature in the present embodiment. As a result, it is possible to prevent the difference between the foot temperature and the ventilator temperature from becoming excessively large. Therefore, it is possible to make the occupant feel the comfort of the indoor temperature in the bi-level mode. The difference between the foot temperature and the ventilator temperature in the bi-level mode is determined by the rib 25.
And 26 allow easy tuning.

Next, a description will be given of a full hot state in which the slide plate 21 of the slide door device 9 closes the upper half of the frame 20, as shown in FIG. In this state, the air that has passed through the cooling heat exchanger 7 passes through the heating heat exchanger 8 and becomes hot air, and when the opening / closing door 10 closes the foot opening 37, the hot air flows to the ascending passage 6C side. It is designed to be sent out. In the state where the opening / closing door 10 releases the foot opening 37 (shown by a two-dot chain line in FIG. 12), the foot opening 3 is opened.
The warm air is introduced into the inside of the chamber 7.

In this embodiment, since the air passage frame 20 and the slide plate 21 are integrated into a so-called cartridge, the manufacture of the air conditioning unit for a vehicle becomes extremely easy, the workability is improved, and the manufacturing is improved. Cost can be reduced. Also, even if the model is different,
The slide door device can be shared, thereby further improving workability and reducing costs. Furthermore, even if a plastic material different from that of the unit case 2 or the like is used for the sliding door device, it can be easily removed, so that the sorting process after use can be performed, and the unit can be easily recycled. Moreover, the sliding movement stability of the sliding plate 21 can be guaranteed by the sliding door device alone, and the operational reliability is improved.

Further, in the present embodiment, by integrating the air passage frame 20 and the slide plate 21 and forming a cartridge, the size of the upper and lower arrangement of the cooling heat exchanger and the heating heat exchanger can be reduced. Thus, the size of the entire unit can be reduced.

Next, the embodiment shown in FIG. 13 will be described. In the present embodiment, the form of the support bracket 33 that supports the slide door device 9 is different. That is, in the above embodiment, the slide door device 9 is supported by the door support brackets 33, 33 formed integrally with the support brackets 18, 18 for mounting the cooling heat exchanger 7, but FIG. As shown, the support brackets 18, 18
Separately from this, the slide door device 9 may be supported on a partition wall 33A that partitions each air passage.

Further, in the above embodiment, the slide door device 9 made into a cartridge is connected to the support brackets 33 and 3.
3, the air passage frame of the sliding door device 9 is provided on a partition wall for partitioning each passage, and the slide plate 21 is directly slidably mounted on the air passage frame provided on the partition wall. Is also good.

Although the embodiments have been described above, the present invention allows various design changes accompanying the gist of the configuration. For example, in the above-described embodiment, the frame 20 and the slide plate 21 constituting the slide door device 9 are curved so as to swell toward the downstream side. It is possible.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a vehicle air conditioning unit according to the present invention.

FIG. 2 is a perspective view showing a half of a unit case used in the embodiment.

FIG. 3 is a perspective view of the vehicle air conditioning unit of the embodiment.

FIG. 4 is an exploded perspective view of the slide door device used in the embodiment.

FIG. 5 is a perspective view of a slide door device used in the embodiment.

FIG. 6 is an explanatory plan view illustrating a blowing path near an upper opening according to the embodiment.

FIG. 7 is an essential part cross-sectional view showing a full cool mode in the vehicle air conditioning unit of the embodiment.

FIG. 8 is a main-portion cross-sectional view showing a vent mode or a differential mode in the vehicle air-conditioning unit of the embodiment.

FIG. 9 is an essential part cross-sectional view showing a bi-level mode in the vehicle air conditioning unit of the embodiment.

FIG. 10 is a perspective view showing a bi-level mode in the vehicle air conditioning unit of the embodiment.

FIG. 11 is a graph showing a relationship between each mode and a blowout temperature in a bilevel mode of the embodiment.

FIG. 12 is an essential part cross-sectional view showing a full hot mode in the vehicle air conditioning unit of the embodiment.

FIG. 13 is a perspective view showing a half of a unit case of another embodiment of the vehicle air conditioning unit of the embodiment.

FIG. 14 is an explanatory view of a conventional vehicle air conditioning unit.

FIG. 15 is an explanatory diagram showing a reference example of an air conditioning unit for a vehicle.

FIG. 16 is a graph showing a relationship between each mode and a blowout temperature in a bilevel mode in a reference example.

[Explanation of symbols]

 Reference Signs List 2 Unit case 2A, 2C Case wall surface 2B Case bottom wall surface 3 Blower 4, 5 Upper release opening 6A Down passage 6B U-turn passage 6C Up passage 7 Cooling heat exchanger 8 Heating heat exchanger 9 Slide door device 10 Opening / closing door 10A Pivot shaft 14 Car room 16 Engine room 22 Drive shaft 25 Guide plate 26 Central guide plate 32 Rotating cylinder 37 Foot port 40 Air mix chamber

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Kuniyoshi Takahashi, 5-24-15 Minamidai, Nakano-ku, Tokyo Calsonic Co., Ltd. (72) Kaoru Kamiyama 5-24-15 Minamidai, Nakano-ku, Tokyo Calso Nick Corporation F-term (reference) 3L011 BA01

Claims (8)

[Claims] 1. A blower (3) and air blown out of the blower (3) are provided in a unit case (2) disposed in a front part of a vehicle interior (14) behind an engine room (16). (6A) that descends and guides the case along the case wall (2A) on the vehicle compartment (14) side, and the descending passage (6A)
And communicates with the lower part of the engine room (1).
A lower passageway (6B) for guiding toward the case wall (2C) on the side of the unit (6), and an upper opening ( 4, 5) and the lower passage (6).
B) the air passing through B) rises and guides along the case wall (2C) on the side of the engine room (16), and an ascending passage (6C), from the upstream to the downstream in the lower passage (6B). Heat exchanger for cooling (7), sliding door device (9),
A heating heat exchanger (8) is disposed, and the slide door device (9) transfers the air passing through the cooling heat exchanger (7) upstream and downstream of the heating heat exchanger (8). And mixing and harmonizing hot air and cold air in a region (40) downstream of the heating heat exchanger (8) in the lower passage (6B). Air conditioning unit for vehicles. 2. The vehicle air conditioner unit (1) according to claim 1, wherein the cooling heat exchanger (7) is installed so as to stand substantially vertically in the lower passage (6B), The sliding door device (9) is installed so as to overlap the cooling heat exchanger (7), and the heating heat exchanger (8) is connected to the cooling heat exchanger via the sliding door device (9). The cooling heat exchanger (7) and the heating heat exchanger (8) are placed sideways in the lower passage (6B) so as to lie substantially perpendicularly to the vertical middle part of (7). An air conditioning unit for a vehicle, wherein the air conditioning unit is arranged so as to form a substantially T-shape. 3. The vehicle air conditioning unit (1) according to claim 2, wherein the slide door device (9) is provided in the lower passage (6B).
An air passage frame (20) disposed so as to cover the entire cross section in a direction substantially perpendicular to the flow direction of the air, a slide plate (21) slidable up and down along the air passage frame (20), and the slide plate An air conditioning unit for a vehicle, comprising: slide drive transmission means (22, 32) for vertically sliding (21) with respect to the air passing frame (20). 4. The vehicle air conditioning unit (1) according to claim 3, wherein the slide plate (21) divides the lower passage (6B) into an upper passage and a lower passage, and An air conditioning unit for a vehicle, wherein a ratio of a cross-sectional area of the upper passage to a cross-sectional area of the lower passage is changed by performing a lifting operation along an air passage frame (20). 5. The air conditioning unit (1) for a vehicle according to claim 3, wherein the air passing frame (20) and the slide plate (2).
1) is curved so as to bulge toward the downstream side of the lower passage (6B), and a gap is formed between the slide plate (21) and the cooling heat exchanger (7) to reduce wind pressure. An air conditioning unit for a vehicle, comprising: 6. An air conditioning unit (1) for a vehicle according to claim 5, wherein the lower passage (6B) is provided on the downstream side of the heating heat exchanger (8) in the vehicle compartment (14). A foot outlet passage inlet (37) communicating with the foot outlet of the foot passage is formed on the lower wall surface (2B) in the lower passage (6B), and the foot outlet passage inlet (3) is formed.
An opening / closing door (10) for opening and closing both the lower passage (7) and the lower passage (6B) is pivoted on a pivot shaft (10A) at a position on the ascending passage (6C) side from the foot outlet passage entrance (37). An air conditioning unit for a vehicle, which is supported. 7. The air conditioning unit (1) for a vehicle according to claim 6, wherein the slide plate (21) is connected to the air passage frame (2).
In the state moved to the uppermost position of (0), the air that has passed through the cooling heat exchanger (7) is discharged from the heating heat exchanger (8).
When the slide plate (21) is moved to the lowermost position of the air passage frame (20), the air that has passed through the cooling heat exchanger (7) loses the heating heat. The heating heat exchanger (7) is prevented from flowing out to the upstream side of the exchanger (8) and a straight line connecting the lower end of the air passage of the cooling heat exchanger (7) and the pivot (10A). 8) The air conditioning unit for a vehicle, wherein is set to be located on the lower side. 8. The air conditioning unit (1) according to claim 3, wherein the air passage frame (20) passes through the heating heat exchanger (8). An air conditioning unit for a vehicle, comprising: a guide plate (25, 26) for guiding a part of the generated air to an upper wall surface of the lower passage (6B).