WO2016104059A1

WO2016104059A1 - Air conditioner for motor vehicle

Info

Publication number: WO2016104059A1
Application number: PCT/JP2015/083552
Authority: WO
Inventors: 勝郎渡邉; 孝浩瀬戸
Original assignee: サンデンホールディングス株式会社; 株式会社ケーヒン
Priority date: 2014-12-24
Filing date: 2015-11-30
Publication date: 2016-06-30
Also published as: CN107107707A; JP2016120732A; JP6441663B2; CN107107707B

Abstract

The present invention suppresses thermal degradation of an air conditioning case 2 and furthermore increases the independence of temperature adjustment control. The air conditioning case 2 is partitioned by a partition member 10 into a first air channel 11 and a second air channel 12. An interior condenser 19, which is a heat exchanger for heating, is inserted into a cutout portion 31 formed in the partition member 10 and is disposed across the first air channel 11 and the second air channel 12. In the interior condenser 19, a portion in contact with the air conditioning case 2 is covered by a heat-resistant cover 35a, 35b. The heat-resistant cover 35a, 35b is provided with frame members 36a, 36b that come into contact and mate with edges 31a, 31b of the cutout portion 31 of the partition member 10.

Description

Automotive air conditioner

The present invention relates to a car air conditioner.

DESCRIPTION OF RELATED ART The apparatus of patent document 1 is known as an automotive air conditioner, especially the automotive air conditioner which can control independently the temperature of multiple places (driver's seat and front passenger seat).
This device comprises an air conditioning case having an air intake and an air outlet, a partition member for dividing the inside of the air conditioning case into parallel first and second air passages, and a partition member formed in the air conditioning case. A heat exchanger (heater core) which 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 individually controlling an amount of air passing through the exchanger.

In the above apparatus, the opening degree of the air mix door on the first air passage side and the opening degree of the air mix door on the second air passage side are independently controlled, 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's seat side, and the air in the second air passage is blown out to the passenger's seat side.

Japanese Patent Application Publication Publication No. H10-278547

However, in the case of using an indoor condenser of a heat pump cycle as a heat exchanger for heating in a car air conditioner, the heat exchanger becomes very high temperature, so if the heat exchanger is inserted and arranged as it is, There is a problem that thermal deterioration is caused and the durability is lowered.
Further, in the automotive air conditioner capable of independently controlling the temperature of a plurality of places, the heat exchanger for heating is inserted into the notch portion of the partition member and straddles the first air passage and the second air passage. Due to the arrangement, the air on the side of the first air passage and the air on the side of the second air passage are mixed together at this portion, which prevents independent control of the air temperature in both passages. There was a problem.

This invention makes it a subject to enable it to suppress the heat deterioration of the air-conditioning case by the heat exchanger for heating in the air conditioner for motor vehicles in view of such a real condition. According to the present invention, in the automotive air conditioner capable of independently controlling the temperature of a plurality of locations, temperature control is performed by suppressing mixing of the air on the first air passage side and the air on the second air passage side. The task is to be able to increase the independence of

In order to solve the above-mentioned problems, in the present invention, the heat exchanger for heating has a configuration in which 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 on the front side in the ventilation direction and in the same direction as the edge of the notch of the partition member. And a frame member in contact with the edge.
Here, a concave groove is formed in either one of the end edges of the notched portion of the partition member and the contact portion with the frame member, and the other forms a convex stripe fitting in the concave groove, It is good to fit.
Further, the heat exchanger for heating is inserted into the notch portion from a mounting / removal opening formed on the outer surface of the air conditioning case in a state of being covered by the heat resistant cover, and the concave groove and the convex stripe The fitting portion may be extended in the insertion direction to double as a guide at the time of insertion.
Furthermore, 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, the space between the two heat exchangers can be formed by the frame member of the heat resistant cover and the partition plate. It is good to set it as the partition.

According to the present invention, the heat deterioration of the air conditioning case can be suppressed by covering the heat exchanger for heating which becomes high temperature with the heat resistant cover. Furthermore, in the case of an automotive air conditioner capable of independently controlling temperatures at a plurality of locations, the heat resistance cover is devised to improve the sealability between the first air passage and the second air passage. Can improve the independence of temperature control.

The whole block diagram of the air conditioner for motor vehicles concerning one embodiment of the present invention Main part sectional view of air conditioner same as above Main part plan view of air conditioner same as above An exploded perspective view of the indoor capacitor and the heat-resistant cover A perspective sectional view of an air conditioner showing an arrangement state of an indoor condenser etc. Main part plan view of air conditioner showing modified example

Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a whole block diagram of a car air conditioner according to an embodiment of the present invention, and FIG. 2 is a sectional view of an essential part of the above air conditioner.
An air conditioner (HVAC (Heating Ventilation and Air Conditioning) unit) 1 is disposed in the cabin of a car (including an engine-driven car, an electric car, and a hybrid car), and is equipped with cabin air (inner air) or cabin outdoor air ( Take in the ambient air, adjust the temperature, and blow it out into the passenger compartment.

The air conditioner 1 includes an air intake port at one end and an air outlet at the other end. The air conditioner 1 includes a resin-made air conditioning case 2 that forms an air passage 3 therein.
On the inlet side of the air passage 3, the inside air intake 4 and the outside air intake 5, the inside / outside air switching door 6 for selectively switching these

intakes

4, 5, the filter 7, the air from the intakes 4, 5 A blower 8 for taking in and blowing air (inside air or outside air) is provided.
On the downstream side of the blower 8 of the air passage 3, an evaporator 9 which is a cooling heat exchanger is provided.

The evaporator 9 is a cooling heat exchanger of a heat pump cycle, and during the cooling operation of the heat pump cycle, the refrigerant condensed by the outdoor condenser (not shown) flows in via the pressure reducing means, and the flowing refrigerant is air Heat and evaporate by heat exchange with. At this time, the air flowing through the evaporator 9 is cooled and provided for cooling the passenger compartment. During the heating operation of the heat pump cycle, the refrigerant bypasses the evaporator 9.

The air-conditioning apparatus 1 is also configured as a left-right independent type, and includes a partition member (center plate) 10 that divides the downstream side of the evaporator 9 of the air passage 3 into parallel first air passages 11 and second air passages 12. .
Accordingly, the downstream side of the evaporator 9 of the air passage 3 is divided into the left and right parallel first air passages 11 and the second air passages 12 by the vertically disposed partition member 10.
The air conditioning case 2 is divided at the part of the partition member 10, and is joined integrally while sandwiching the partition member 10.

The first air passage 11 is also divided by the partition wall 13 into a heating passage 15 and a bypass passage 17. Although the bypass passage 17 is shown beside the heating passage 15 in FIG. 1, the bypass passage 17 is actually formed on the upper side of the heating passage 15 as shown in FIG.
The second air passage 12 is also divided by the partition wall 14 into a heating passage 16 and a bypass passage 18. Although the bypass passage 18 is shown beside the heating passage 16 in FIG. 1, the bypass passage 18 is actually formed on the upper side of the heating passage 16 as shown in FIG. In FIG. 2, the second air passage 12 is on the back side of the drawing 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 heating heat exchanger. Specifically, the heater core 20 is provided on the upstream side in the air flow direction, and the indoor condenser 19 is provided on the downstream side. The indoor capacitor 19 and the heater core 20 are respectively inserted into the

notches

31 and 32 formed in the partition member 10, and are disposed straddling the two

heating passages

15 and 16.
Therefore, 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 heating heat exchanger of a heat pump cycle, and during heating operation of the heat pump cycle, a high temperature / high pressure gas refrigerant compressed by a compressor (not shown) flows in and condenses by heat exchange with air. It is liquefied. At this time, the air flowing through the indoor condenser 19 is heated and provided for heating the passenger compartment. During the cooling operation of the heat pump cycle, heat exchange with air is not performed due to the closing of the

air mix doors

21 and 22 described later, and the refrigerant passes as it is.

The heater core 20 is an auxiliary heating unit suitable for an engine-driven automobile, and heats air by using engine cooling water (engine cooling water that has received and cooled the engine) as a heat medium.
Therefore, in the case of an electric vehicle, an electric heater, in particular a PTC heater, is used as the auxiliary heating means in place of the heater core 20. The PTC heater heats the air by passing the air through the electrically heated heater element. Temperature control becomes easy by using a PTC heater especially as an 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 flow of air 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 proportion of air flowing to the heating passage 16 and the bypass passage 18 and has a function of blocking the flow of air to the heating passage 16 during cooling operation.
By providing the two

air mix doors

21 and 22 separately so as to be adjustable in opening degree, it becomes possible to adjust the temperature independently of each other.

In the outlet side of the first air passage 11 (the outlet side joining portion between the heating passage 15 and the bypass passage 17), a face outlet 23 on the driver's seat side to blow out the temperature-controlled air to the driver's seat side; A driver's side foot outlet 25 is provided, which are opened and closed by respective doors.
In the outlet side of the second air passage 12 (the outlet side joining portion between the heating passage 16 and the bypass passage 18), a face outlet 24 on the passenger seat side is provided to blow out the temperature-controlled air to the passenger seat side; A passenger side foot outlet 26 is provided, which are opened and closed by respective doors.
In addition to this, a differential outlet 27 (FIG. 2) is provided as the air outlet. However, in order to blow out air having a uniform temperature on the driver's seat side and the passenger's seat side, the differential outlet 27 is disposed in common to the left and right.

Next, a mounting aspect of the indoor condenser 19 (and the heater core 20), which is a heating heat exchanger, will be described with reference to FIGS.
3 is a plan view of an essential 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 an arrangement state of the indoor condenser and the like.

If the number of heating means for heating is two, that is, the indoor condenser 19 and the heater core (or PTC heater) 20, the air conditioner 1 is increased in size accordingly, and these are disposed as close as possible.
The indoor condenser 19 and the heater core 20 are inserted from and attached to the two attachment /

removal 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 mutually different surfaces of the air conditioning case 2. Therefore, the indoor condenser 19 and the heater core 20 are inserted into and attached to the air conditioning case 2 from different directions.

More specifically, a mounting / removal 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 into and attached to the air conditioning case 2 from below.
Further, a mounting / dismounting 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 from the side to the air conditioning case 2 and attached.
As described above, by inserting and attaching the two heating means to the air conditioning case 2 from different directions, it is possible to prevent the parts outside the air conditioning case 2 from interfering with each other.

The mounting aspect of the indoor condenser 19 will be described in more detail.
As shown in FIG. 4, the indoor capacitor 19 is covered with a frame-shaped heat-resistant cover (cover made of heat-resistant resin) 35 a, 35 b in contact with the air conditioning case 2.
In other words, the heat resistant covers 35 a and 35 b accommodate the indoor capacitor 19 and cover the contact portion with the air conditioning case 2 except the air flow portion on the outer surface of the indoor capacitor 19.
The heat

resistant covers

35a and 35b have a half structure of the front cover 35a and the rear cover 35b, and accommodate the indoor capacitor 19 between the two front and

rear covers

35a and 35b.

Each of the

covers

35a and 35b is a rectangular frame comprising an upper frame, a lower frame and left and right side frames as shown in FIG. 4, but as will be described in detail later, in the case of the front cover 35a, the front side, 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 central part in the width direction of the upper frame and the central part in the width direction of the lower frame.
As a material (heat-resistant resin) of the heat-

resistant covers

35a and 35b, PBT-GF30 (designated as ISO (JIS) material) is preferable.

The heat

resistant covers

35a and 35b extend continuously in the vertical direction on 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 notches 31 of the partition member (center plate) 10. A frame member (center frame) 36a in contact with the end edge 31a is provided. Therefore, the frame member 36 a extends in the same direction as the end edge 31 a of the notch 31 of the partition member 10 and contacts the end edge 31 a.
The heat

resistant covers

35a and 35b also extend continuously in the vertical direction on the rear side of the ventilation direction, that is, in the widthwise center of the rear cover 35b, and the notches 31 of the partition member (center plate) 10 And a frame member (center frame) 36b in contact with the rear edge 31b of the frame. Therefore, the frame member 36 b extends in the same direction as the edge 31 b of the notch 31 of the partition member 10 and contacts with the edge 31 b.

In the present embodiment (FIG. 3), the recessed

grooves

37a, 37b in which the

frame members

36a, 36b are fitted are at the

end edges

31a, 31b of the notches 31 of the partition member 10 in contact with the

frame members

36a, 36b. Be equipped.
Therefore,

concave grooves

37a and 37b are formed on the side of the end edges 31a and 31b at the contact portions between the end edges 31a and 31b of the notch 31 of the partition member 10 and the

frame members

36a and 36b. The sides 36b are in engagement with one another in the form of ridges which fit into the

grooves

37a, 37b.
In other words, a guide rail portion having a U-shaped cross section is formed at the end edges 31 a and 31 b of the notch 31.
Therefore, the indoor capacitor 19 is inserted into the notch 31 of the partition member 10 from the mounting opening 33 formed on the outer surface of the air conditioning case 2 in a state of being housed in the heat

resistant covers

35a and 35b, and the concave groove 37a, The fitting portion between 37b and the ridges (

frame members

36a and 36b) extends in the insertion direction and doubles as a guide at the time of insertion.

FIG. 6 shows a modification of FIG.
Here, on the side of the

frame members

36a and 36b in contact with the end edges 31a and 31b of the notch 31 of the partition member 10,

concave grooves

38a and 38b in which the end edges 31a and 31b are fitted are provided.
Therefore,

concave grooves

38a and 38b are formed on the side of the

frame members

36a and 36b at the contact portions between the end edges 31a and 31b of the notch 31 of the partition member 10 and the

frame members

36a and 36b. The sides 31b engage with each other in the form of ridges that fit into the

grooves

38a, 38b.
In other words, a guide rail portion having a U-shaped cross section is 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 mounting opening 33 formed on the outer surface of the air conditioning case 2 in a state of being accommodated in the heat

resistant covers

35a and 35b, and the concave groove 38a, The fitting portion between the projection 38b and the ridges (

edges

31a and 31b) extends in the insertion direction and doubles as a guide at the time of insertion.

Further, in FIG. 3 or FIG. 6, the heater core 20 is disposed in series with and close to the indoor capacitor 19 covered by the heat

resistant covers

35a, 35b. The space 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 member 10 (specifically, the end edge of the notch 32 of the partition member 10).

According to the above embodiment, the indoor condenser 19 which is the heating heat exchanger is covered with the heat

resistant covers

35a and 35b at the contact portion with the air conditioning case 2, so that the heat deterioration of the air conditioning case 2 can be prevented. However, the present effect is not limited to the left and right independent type automotive air conditioners, and an air conditioning case having an air intake and an air outlet, and a heat exchanger disposed in the air conditioning case to heat the air; The present invention can be obtained in an automotive air conditioner configured to include an air mix door that controls the amount of air passing through the heat exchanger.

Further, according to the above embodiment, the heat

resistant covers

35a, 35b extend in the same direction as the

end edges

31a, 31b of the notch 31 of the partition member 10, and are in contact with the

end edges

31a, 31b. Since the

members

36a and 36b are provided, the sealing performance (wind protection performance) between the first air passage 11 and the second air passage 12 can be improved, and the independence of temperature control can be improved. .

Moreover, according to said embodiment, the contact part of

edge

31a, 31b of the notch 31 of the partition member 10, and

frame member

36a, 36b is

concave groove

37a, 37b (or 38a, and) in any one. The following effects can be obtained by forming the ridges 38b) and forming the ridges in which the other is fitted in the recessed groove to be fitting parts fitted together. That is, the sealing performance (wind protection performance) between the first air passage 11 and the second air passage 12 can be improved by the labyrinth effect by the fitting of the concave portion and the convex portion. As a result, the sealability can be improved without using packing or the like, which can contribute to the reduction of the number of parts and the cost reduction.

Further, according to the above embodiment, the indoor condenser 19 which is a heating heat exchanger is a partition member from the removable opening 33 formed on the outer surface of the air conditioning case 2 in a state of being covered by the heat

resistant covers

35a and 35b. The following effects can be obtained by inserting into the notch portion 31 of 10, the fitting portion between the concave groove and the convex stripe extending in the insertion direction and also serving as a guide at the time of insertion. it can. That is, by providing the guide at the time of insertion, the assembly of the indoor capacitor 19 is facilitated, and since the guide also serves as the seal portion, sealing performance can be secured simultaneously with the assembly.

Further, according to the above embodiment, the

frame members

36a and 36b (and the fitting structure) are the front side in the ventilation direction of the heat

resistant covers

35a and 35b, that is, the rear side in the ventilation direction, that is, the rear side. By providing the cover 35 b as well, the sealability between the first air passage 11 and the second air passage 12 can be sufficiently improved. However, since the air flow resistance on the front side in the ventilation direction is larger than that on the rear side in the ventilation direction, and the influence of air leakage becomes remarkable, the frame member 36a (and the fitting structure) is only on the front side in the ventilation direction, that is, the front cover 35a. May be provided.

In the above embodiment, the heat resistant case is not used for the heater core 20 which is the auxiliary heating means, since there is no problem in heat resistance as compared with the indoor capacitor 19. In this case, the sealability by straddling the first air passage 11 and the second air passage 12 can be solved by using a packing or the like.

Moreover, in the above embodiment, the space between the indoor capacitor 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 end edge of the notch 32 of the partition plate 10). By adopting the configuration, the partition in this portion can be made reliable, and the independence of temperature control can be enhanced.

The illustrated embodiment is merely an example of the present invention, and in addition to the one directly shown by the described embodiment, various improvements made by those skilled in the art within the scope of the claims can be made. It goes without saying that it is intended to cover changes.

1 Air conditioner (HAVC unit)
Reference Signs List 2 air conditioning case 3 air passage 4 inside air intake 5 outside air intake 6 inside / outside air switching door 7 filter 8 blower 9 evaporator 10 partition member (center plate)
11 first air passage 12

second air passage

13, 14

partition wall

15, 16

heating passage

17, 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 side face outlet 25 on the passenger's seat side foot outlet 26 on the driver's seat side foot outlet 27 on the passenger seat side

differential outlet

27, 32

notches

31a, 31b Edges 33 and 34 of the Notched Portion 31 Attachment and

Detachment Ports

35a and 35b Heat-

Resistant Covers

36a and 36b Frame Members (Center Frame)
37a, 37b A recessed groove (guide rail portion) formed on the

edge

31a, 31b of the notch 31
Recesses (guide rails) formed on the

frame members

36a and 36b

Claims

An air conditioning case having an air intake and an air outlet;
A heat exchanger disposed in the air conditioning case for heating the air;
An air mix door controlling an amount of air passing through the heat exchanger;
An automotive air conditioner comprising:
An air conditioner for a vehicle, wherein the heat exchanger is covered with a heat resistant cover at a contact portion with the air conditioning case.
An air conditioning case having an air intake and an air outlet;
A partition member for dividing the inside of the air conditioning case into a parallel first air passage and a second air passage;
A heat exchanger which 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 air in the passage;
An air mix door individually controlling an amount of air passing through the heat exchanger in each of the first air passage and the second air passage;
An automotive air conditioner comprising:
The heat exchanger covers the contact portion with the air conditioning case with a heat resistant cover,
The heat-resistant cover includes a frame member extending at least on the front side in the ventilation direction and in the same direction as an edge of the notch of the partition member and in contact with the edge. Air conditioner.
An end edge of the notch of the partition member and a contact portion between the frame member and the frame member have a concave groove formed in one of them, and the other forms a convex stripe fitting in the concave groove and is engaged with each other The automotive air conditioner according to claim 2, characterized in that.
The heat exchanger is inserted into the cutout portion from a mounting / removal port formed on the outer surface of the air conditioning case in a state of being covered by the heat resistant cover.
The automotive air conditioner according to claim 3, wherein the fitting portion between the concave groove and the convex stripe extends in the insertion direction and doubles as a guide at the time of insertion.
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.
Another heat exchanger is provided in series with the heat exchanger covered with the heat resistant cover, and the space between the two heat exchangers is divided by the frame member of the heat resistant cover and the partition member. The automotive air conditioner according to claim 2, characterized in that.