JP2016120732A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inhibit heat deterioration of an air conditioning case 2 and improve independence of temperature regulation control.SOLUTION: An air conditioning case 2 is divided into a first air passage 11 and a second air passage 12 by a partition member 10. An indoor condenser 19 serving as a heat exchanger for heating is inserted into a cutout part 31 formed in the partition member 10 to be disposed lying astride the first air passage 11 and the second air passage 12. A contact part of the indoor condenser 19 which contacts with the air conditioning case 2 is covered by heat resistant covers 35a, 35b. The heat resistant covers 35a, 35b respectively include frame members 36a, 36b which contact with end edges 31a, 31b of the cutout part 31 of the partition member 10 and fit in the end edges 31a, 31b.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an automotive air conditioner.

As an automobile air conditioner, in particular, an automobile air conditioner capable of independently controlling temperatures at a plurality of locations (driver's seat and passenger seat), an apparatus described in Patent Document 1 is known.
This device is formed in an air conditioning case having an air intake port and an air outlet, a partition member for partitioning the inside of the air conditioning case into a first air passage and a second air passage, and a partition member in the air conditioning case. A heat exchanger (heater core) that is inserted into the notch and straddles the first air passage and the second air passage and heats the air in the passage, and heat is generated in each of the first air passage and the second air passage. And an air mix door that individually controls the amount of air passing through the exchanger.

  In the above apparatus, the opening degree of the air mixing door on the first air passage side and the opening degree of the air mixing door on the second air passage side are controlled independently, and the temperature of the air in the first air passage and the second By independently controlling the temperature of the air in the air passage, the air in the first air passage is blown out to the driver seat side, and the air in the second air passage is blown out to the passenger seat side.

Japanese Patent Laid-Open No. 10-278547

However, in an automotive air conditioner, the heat exchanger becomes considerably hot, such as when using an indoor condenser of a heat pump cycle as a heat exchanger for heating. There was a problem that the thermal deterioration was caused and the durability was lowered.
Moreover, in the automotive air conditioner capable of independently controlling the temperatures at a plurality of locations, the heating heat exchanger is inserted into the notch portion of the partition member and straddles the first air passage and the second air passage. Therefore, the air on the side of the first air passage and the air on the side of the second air passage are mixed in this portion, thereby preventing the air temperature in both passages from being controlled independently. There was a problem.

  This invention makes it a subject to make it possible to suppress the thermal deterioration of the air-conditioning case by the heat exchanger for heating in an automotive air conditioner in view of such a situation. The present invention further provides a temperature control by suppressing the mixing of the air on the first air passage side and the air on the second air passage side in an automotive air conditioner capable of independently controlling the temperatures at a plurality of locations. It is an object to be able to increase the independence of.

In order to solve the above-described problem, in the present invention, the heating heat exchanger is configured such that the contact portion with the air conditioning case is covered with a heat-resistant cover.
In the present invention, in the case of an automotive air conditioner capable of independently controlling temperatures at a plurality of locations, the heat-resistant cover is at least in the same direction as the edge of the notch portion of the partition member on the front side in the ventilation direction. It is set as the structure provided with the frame member which extends to and contacts the said edge.
Here, the edge part of the notch part of the partition member and the contact part of the frame member are formed with a groove on either side, and the other is formed with a ridge that fits into the groove, and It is good to fit.
Further, the heat exchanger for heating is inserted into the cutout portion from the attachment / detachment opening formed on the outer surface of the air conditioning case in a state covered with the heat-resistant cover, and the groove and the ridge The fitting portion may extend in the insertion direction and serve as a guide for insertion.
Further, the frame member may be provided not only on the front side in the ventilation direction of the heat resistant cover but also on the rear side in the ventilation direction.
Furthermore, when another heat exchanger is provided in series with the heat exchanger covered with the heat-resistant cover, a gap between the two heat exchangers is formed between the frame member of the heat-resistant cover and the partition plate. A partitioning configuration is preferable.

  ADVANTAGE OF THE INVENTION According to this invention, the heat deterioration of an air-conditioning case can be suppressed by covering the heat exchanger for heating which becomes high temperature with a heat-resistant cover. Furthermore, in the case of an automotive air conditioner capable of independently controlling the temperatures at a plurality of locations, the sealing performance between the first air passage and the second air passage can be improved by devising this heat-resistant cover. And independence of temperature control can be enhanced.

1 is an overall configuration diagram of an automotive air conditioner according to an embodiment of the present invention. Cross-sectional view of the main part of the air conditioner Plan view of the main part of the air conditioner Disassembled perspective view of indoor capacitor and heat-resistant cover Perspective cross-sectional view of an air conditioner showing an arrangement state of indoor condensers and the like The principal part top view of the air-conditioner which shows a modification

Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is an overall configuration diagram of an automotive air conditioner according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a main part of the same air conditioner.
An air conditioner (HVAC (Heating Ventilation and Air Conditioning) unit) 1 is disposed in a vehicle interior of an automobile (including an engine-driven automobile, an electric vehicle, and a hybrid vehicle), and is equipped with a vehicle interior air (inside air) or a vehicle exterior air ( Take outside air), adjust the temperature, and blow it out into the passenger compartment.

The air conditioner 1 includes a resin air conditioning case 2 having an air intake port on one end side and an air outlet port on the other end side and forming an air passage 3 therein.
On the inlet side of the air passage 3, the air from the inside air intake port 4 and the outside air intake port 5, the inside / outside air switching door 6 that selectively switches between these intake ports 4, 5, the filter 7, and the intake ports 4, 5 And a blower 8 that takes in (inside air or outside air) and blows air.
An evaporator 9, which is a cooling heat exchanger, is provided on the downstream side of the blower 8 in the air passage 3.

  The evaporator 9 is a heat exchanger for cooling the heat pump cycle. During the cooling operation of the heat pump cycle, the refrigerant condensed by the outdoor condenser (not shown) flows in through the decompression means, It is heated and evaporated by heat exchange. At this time, the air flowing through the evaporator 9 is cooled and used for cooling the passenger compartment. In the heating operation of the heat pump cycle, the refrigerant bypasses the evaporator 9.

The air conditioner 1 is also a left and right independent type, and includes a partition member (center plate) 10 that partitions the downstream side of the evaporator 9 of the air passage 3 into a first air passage 11 and a second air passage 12 that are arranged in parallel. .
Therefore, the downstream side of the evaporator 9 in the air passage 3 is partitioned into a left and right parallel first air passage 11 and second air passage 12 by a partition member 10 arranged vertically.
The air conditioning case 2 is divided at the partition member 10 and is integrally joined with the partition member 10 interposed therebetween.

The first air passage 11 is also divided into a heating passage 15 and a bypass passage 17 by a partition wall 13. In FIG. 1, the bypass passage 17 is illustrated beside the heating passage 15, but actually, as shown in FIG. 2, the bypass passage 17 is formed above the heating passage 15.
The second air passage 12 is also partitioned into a heating passage 16 and a bypass passage 18 by a partition wall 14. In FIG. 1, the bypass passage 18 is shown beside the heating passage 16, but actually, as shown in FIG. 2, the bypass passage 18 is formed above the heating passage 16. In FIG. 2, the second air passage 12 is on the back side of the paper surface with respect to the first air passage 11.

An indoor condenser 19 and a heater core 20 are provided in series in the two heating passages 15 and 16 as a heat exchanger for heating. Specifically, the heater core 20 is provided on the upstream side, and the indoor condenser 19 is provided on the downstream side. Each of the indoor condenser 19 and the heater core 20 is inserted into the notches 31 and 32 formed in the partition member 10 and is disposed across the two heating passages 15 and 16.
Accordingly, the bypass passages 17 and 18 bypass the two heating means (the indoor condenser 19 and the heater core 20).

  The indoor condenser 19 is a heat exchanger for heating of the heat pump cycle. During heating operation of the heat pump cycle, high-temperature and high-pressure gas refrigerant compressed by a compressor (not shown) flows in and is condensed by heat exchange with air. Liquefied. At this time, the air flowing through the indoor condenser 19 is heated and used for heating the passenger compartment. In the cooling operation of the heat pump cycle, the air mix doors 21 and 22 described later are closed, so that heat exchange with the air is not performed and the refrigerant passes as it is.

The heater core 20 is auxiliary heating means suitable for an engine-driven automobile, and heats air using engine cooling water (engine cooling water received by cooling the engine) as a heat medium.
Therefore, in the case of an electric vehicle, an electric heater, particularly a PTC heater is used as an auxiliary heating means instead of the heater core 20. The PTC heater heats air by passing air through an electrically heated heater element. Temperature control is facilitated by using a PTC heater as the electric heater.

An air mix door 21 is provided on the inlet side of the heating passage 15 and the bypass passage 17 in the first air passage 11.
The air mix door 21 controls the ratio of air flowing to the heating passage 15 and the bypass passage 17 and has a function of blocking the air flow to the heating passage 15 during the cooling operation.
An air mix door 22 is also provided on the inlet side of the heating passage 16 and the bypass passage 18 in the second air passage 12.
The air mix door 22 controls the ratio of air flowing to the heating passage 16 and the bypass passage 18 and has a function of blocking the air flow to the heating passage 16 during the cooling operation.
By providing the two air mix doors 21 and 22 so that the opening degree can be adjusted separately, the left and right independent temperature adjustment is possible.

On the outlet side of the first air passage 11 (the outlet side joining portion of the heating passage 15 and the bypass passage 17), in order to blow out the temperature-controlled air to the driver seat side, a face outlet 23 on the driver seat side, A foot outlet 25 on the driver's seat side is provided, and these are opened and closed by respective doors.
On the outlet side of the second air passage 12 (the outlet side joining portion of the heating passage 16 and the bypass passage 18), in order to blow out the temperature-controlled air to the passenger seat side, a face outlet 24 on the passenger seat side, There are foot outlets 26 on the passenger seat side, which are opened and closed by the respective doors.
In addition to this, a differential outlet 27 is provided as an air outlet. However, the differential outlet 27 is arranged in common on the left and right sides so as to blow out air at a uniform temperature on the driver seat side and the passenger seat side.

Next, how to attach the indoor condenser 19 (and the heat core 20), which is a heat exchanger for heating, will be described with reference to FIGS.
3 is a plan view of the main part of the air conditioner, FIG. 4 is an exploded perspective view of the indoor condenser and the heat-resistant cover, and FIG. 5 is a perspective sectional view of the air conditioner showing the arrangement state of the indoor condenser and the like.

If the heating means for heating is made into two, the indoor condenser 19 and the heater core (or PTC heater) 20, the air conditioner 1 will be enlarged correspondingly, so these are arranged as close as possible.
The indoor condenser 19 and the heater core 20 are inserted and attached from the two attachment / detachment ports 33 and 34 formed on the outer surface of the air conditioning case 2.
The two attachment / detachment ports 33 and 34 are formed on different surfaces of the air conditioning case 2. Therefore, the indoor condenser 19 and the heater core 20 are inserted and attached to the air conditioning case 2 from different directions.

More specifically, an attachment / detachment port 33 (FIG. 2) for the indoor condenser 19 is formed on the bottom surface of the air conditioning case 2, and the indoor condenser 19 is inserted and attached to the air conditioning case 2 from below.
In addition, an attachment / detachment port 34 (FIG. 3) for the heater core 20 is formed on the side surface of the air conditioning case 2, and the heater core 20 is inserted and attached to the air conditioning case 2 from the side.
In this way, by adopting a configuration in which the two heating means are inserted and attached to the air conditioning case 2 from different directions, it is possible to avoid interference between the parts outside the air conditioning case 2.

The manner of mounting the indoor capacitor 19 will be described in more detail.
As shown in FIG. 4, the indoor capacitor 19 has a contact portion with the air conditioning case 2 covered with frame-shaped heat-resistant covers (heat-resistant resin covers) 35 a and 35 b.
In other words, the heat-resistant covers 35 a and 35 b accommodate the indoor condenser 19 and cover a contact portion with the air-conditioning case 2 except for an air flow portion on the outer surface of the indoor condenser 19.
The heat-resistant covers 35a and 35b have a halved structure of a front cover 35a and a rear cover 35b, and house the indoor capacitor 19 between the two front and rear covers 35a and 35b.

As shown in FIG. 4, each cover 35a, 35b is a rectangular frame composed of an upper frame, a lower frame, and left and right side frames, but as will be described in detail later, in the case of the front cover 35a, In the case of the rear cover 35b, frame members (center frames) 36a and 36b are provided on the rear surface side to connect the center portion in the width direction of the upper frame and the center portion in the width direction of the lower frame.
PBT-GF30 (ISO (JIS) material display) is suitable as a material (heat resistant resin) for the heat resistant covers 35a and 35b.

The heat-resistant covers 35a and 35b extend continuously in the up-down direction to the front side in the ventilation direction, that is, in the center in the width direction of the front cover 35a, and on the front side of the notch 31 of the partition member (center plate) 10. A frame member (center frame) 36a that comes into contact with the end edge 31a is provided. Therefore, the frame member 36a extends in the same direction as the end edge 31a of the notch 31 of the partition member 10, and comes into contact with the end edge 31a.
The heat-resistant covers 35a and 35b also extend continuously in the up-and-down direction to the rear side in the ventilation direction, that is, the central portion in the width direction of the rear cover 35b, and the notches 31 of the partition member (center plate) 10. A frame member (center frame) 36b that comes into contact with the rear edge 31b is provided. Therefore, the frame member 36b extends in the same direction as the end edge 31b of the notch 31 of the partition member 10, and contacts the end edge 31b.

In the present embodiment (FIG. 3), concave grooves 37a and 37b into which the frame members 36a and 36b are fitted are formed at the edges 31a and 31b of the cutout portion 31 of the partition member 10 that contacts the frame members 36a and 36b. Provided.
Accordingly, the contact portions between the edges 31a and 31b of the notch 31 of the partition member 10 and the frame members 36a and 36b are formed with concave grooves 37a and 37b on the side of the edges 31a and 31b, and the frame members 36a and 36b are formed. The side of 36b makes the convex line which fits into the said groove 37a, 37b, and it mutually fits.
In other words, U-shaped (U-shaped) guide rail portions are formed on the edges 31a and 31b of the notch 31.
Therefore, the indoor condenser 19 is inserted into the notch 31 of the partition member 10 from the attachment / detachment opening 33 formed on the outer surface of the air conditioning case 2 in the state of being accommodated in the heat resistant covers 35a, 35b, and the concave grooves 37a, The fitting part of 37b and the said protruding item | line (frame member 36a, 36b) is extended in the insertion direction, and serves also as the guide at the time of insertion.

FIG. 6 shows a modification of FIG.
Here, on the side of the frame members 36a and 36b that come into contact with the end edges 31a and 31b of the notch 31 of the partition member 10, the recessed grooves 38a and 38b into which the end edges 31a and 31b are fitted are provided.
Accordingly, the contact portions between the edges 31a and 31b of the notch 31 of the partition member 10 and the frame members 36a and 36b are formed with concave grooves 38a and 38b on the side of the frame members 36a and 36b. The side of 31b makes the protruding line | wire which fits into the said groove 38a, 38b, and it mutually fits.
In other words, guide rail portions having a U-shaped cross section (a U-shape) are formed on the frame members 36a and 36b.
Therefore, the indoor condenser 19 is inserted into the notch 31 of the partition member 10 from the attachment / detachment opening 33 formed on the outer surface of the air conditioning case 2 in the state of being accommodated in the heat resistant covers 35a and 35b, and the concave grooves 38a, The fitting part of 38b and the said protruding item | line (end edge 31a, 31b) is extended in the insertion direction, and serves also as the guide at the time of insertion.

  3 or 6, the heater core 20 is disposed in series with and in close proximity to the indoor capacitor 19 that is covered with the heat-resistant covers 35 a and 35 b. The gap between the indoor capacitor 19 and the heater core 20 is configured to be partitioned by the frame member 36a of the heat-resistant cover 35a and the partition plate 10 (specifically, the edge of the notch 32 of the partition plate 10).

  According to the above embodiment, the indoor condenser 19 that is a heating heat exchanger is covered with the heat-resistant covers 35a and 35b at the contact portion with the air-conditioning case 2, and thus can prevent thermal deterioration of the air-conditioning case 2. However, for this effect, not only the left and right independent automotive air conditioner, an air conditioning case having an air intake port and an air outlet, and a heat exchanger that is disposed in the air conditioning case and heats the air, It can be obtained in an automotive air conditioner that includes an air mix door that controls the amount of air that passes through the heat exchanger.

  Moreover, according to said embodiment, the heat-resistant covers 35a and 35b are the frames which extend in the same direction as the edge 31a, 31b of the notch part 31 of the partition member 10, and contact the said edge 31a, 31b. Since the members 36a and 36b are provided, the sealing performance (wind performance) between the first air passage 11 and the second air passage 12 can be improved, and the independence of the temperature control can be increased. .

  Moreover, according to said embodiment, the contact parts of the edge 31a, 31b of the notch part 31 of the partition member 10, and the frame members 36a, 36b are recessed grooves 37a, 37b (or 38a, 38b) is formed, and the other is formed into a fitting portion that fits into the groove, and the following effects can be obtained. That is, the sealability (wind performance) between the first air passage 11 and the second air passage 12 can be improved by a labyrinth effect by fitting the concave portion and the convex portion. Thereby, even if it does not use packing etc., a sealing performance can be improved and it can contribute to a reduction in a number of parts and cost reduction.

  Moreover, according to said embodiment, the indoor capacitor | condenser 19 which is a heat exchanger for heating is the partition member from the attachment-and-detachment opening 33 formed in the outer surface of the air-conditioning case 2 in the state covered with the heat-resistant covers 35a and 35b. 10 is inserted into the notch 31, and the fitting portion between the groove and the ridge extends in the insertion direction, and also serves as a guide at the time of insertion, thereby obtaining the following effects. it can. That is, by providing the guide at the time of insertion, the assembly of the indoor capacitor 19 is facilitated, and since this guide also serves as a seal portion, the sealing performance can be ensured simultaneously with the assembly.

  Moreover, according to said embodiment, frame member 36a, 36b (and fitting structure) is the ventilation direction front side, ie, the front side cover 35a of the heat-resistant cover 35a, 35b, the ventilation direction rear side, ie, the rear side. By being provided also in the cover 35b, the sealing performance between the first air passage 11 and the second air passage 12 can be sufficiently improved. However, the airflow direction front side has larger airflow resistance than the rear side in the ventilation direction, and the influence of air leakage becomes significant. Therefore, the frame members 36a and 36b (and the fittings only on the front side 35a, that is, the front cover 35a). Structure) may be provided.

  In the above embodiment, the heater core 20 which is an auxiliary heating means does not have a heat resistance problem as compared with the indoor capacitor 19, and therefore a heat resistant case is not used. In this case, the sealing performance by straddling the first air passage 11 and the second air passage 12 can be solved by using packing or the like.

  In addition, in the above embodiment, the gap between the indoor condenser 19 and the heater core 20 is partitioned by the frame member 36a of the heat-resistant cover 35a and the partition plate 10 (specifically, the edge of the notch 32 of the partition plate 10). By adopting the configuration, it is possible to increase the independence of the temperature control by ensuring the partitioning at this portion.

  The illustrated embodiments are merely examples of the present invention, and the present invention is not limited to those directly described by the described embodiments, and various improvements and modifications made by those skilled in the art within the scope of the claims. Needless to say, it encompasses changes.

1 Air conditioner (HAVC unit)
2 Air Conditioning Case 3 Air Passage 4 Inside Air Intake Port 5 Outside Air Intake Port 6 Inside / Outside Air Switching Door 7 Filter 8 Blower 9 Evaporator 10 Partition Member (Center Plate)
11 First air passage 12 Second air passages 13 and 14 Partition walls 15 and 16 Heating passages 17 and 18 Bypass passage 19 Indoor condenser 20 Heater core (or PTC heater)
21, 22 Air mix door 23 Face outlet 24 on the driver's seat Face outlet 25 on the passenger's seat 25 Foot outlet 26 on the driver's seat 26 Foot outlet 27 on the passenger's side 27 Differential outlet 31, 32 31b Edges 33 and 34 of the cutout portion 31 Removable openings 35a and 35b Heat-resistant covers 36a and 36b Frame member (center frame)
37a, 37b Grooves (guide rail portions) formed in the edges 31a, 31b of the notch 31
38a, 38b Grooves (guide rail portions) formed in the frame members 36a, 36b

Claims (6)

An air conditioning case having an air inlet and an air outlet;
A heat exchanger disposed in the air conditioning case for heating air;
An air mix door for controlling the amount of air passing through the heat exchanger;
An air conditioner for an automobile comprising:
The automotive air conditioner, wherein the heat exchanger has a contact portion with the air conditioning case covered with a heat-resistant cover. An air conditioning case having an air inlet and an air outlet;
A partition member that partitions the inside of the air conditioning case into a first air passage and a second air passage that are parallel to each other;
A heat exchanger that is inserted into a notch formed in the partition member in the air conditioning case, straddles the first air passage and the second air passage, and heats the air in the passage;
An air mix door for individually controlling the amount of air passing through the heat exchanger in each of the first air passage and the second air passage;
An air conditioner for an automobile comprising:
The heat exchanger has a contact portion with the air conditioning case covered with a heat-resistant cover,
The heat-resistant cover includes a frame member that extends in the same direction as the edge of the notch of the partition member at the front side in the ventilation direction and contacts the edge. Air conditioner.   The edge part of the notch part of the partition member and the contact part between the frame member are formed with a concave groove on one side, and the other is fitted with each other by forming a ridge that fits into the concave groove. The automotive air conditioner according to claim 2, wherein The heat exchanger is inserted into the notch from the attachment / detachment opening formed on the outer surface of the air conditioning case in a state covered with the heat-resistant cover,
The automotive air conditioner according to claim 3, wherein a fitting portion between the concave groove and the ridge extends in the insertion direction and also serves as a guide at the time of insertion.   5. The automotive air conditioner according to claim 2, wherein the frame member is provided not only on the front side in the ventilation direction but also on the rear side in the ventilation direction of the heat-resistant cover. .   In series with the heat exchanger covered with the heat-resistant cover, another heat exchanger is provided, and the gap between the two heat exchangers is partitioned by the frame member of the heat-resistant cover and the partition plate. The automotive air conditioner according to any one of claims 2 to 5, wherein the air conditioner is for vehicles.