JPH0829089A - Heat exchanger and air conditioner using the same heat exchanger - Google Patents

Abstract

PURPOSE:To improve the pressure-resistant strength of a heat exchanger by a method wherein the breadth of a tube in the flow direction of external fluid is at least a specified value, plate members having a rigidity are provided in header tanks, and one end of each plate member is fixed out a header plate and the other end on the inner wall surface of a header cover. CONSTITUTION:The breadth of a tube 103 in the flow direction of external fluid is 30mm or larger and plate members 111 and 112 having a rigidity are provided in header tanks 102. One end of each of the plate members 111 and 112 is attached on the inner wall surface of a header place 105 and the other end on the inner wall surface of a header cover 106. Thereby, deformation of the header cover 106 that tends to expand due to internal pressure can be restrained. In addition, as the breadth of the tube 103 is 30mm or larger, the external shape of a condenser 10 itself can be the same as that of a heater core that is a heat exchanger to heat air using engine cooling water as a heat source.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger provided in an air conditioning duct, particularly a heat exchanger which can be used as a condenser, and an air conditioner using the heat exchanger.

[0002]

2. Description of the Related Art In a system, such as an electric vehicle, in which waste heat of an engine cannot be used as a heat source for heating a passenger compartment, a method of performing air conditioning in the passenger compartment using a heat pump cycle has been well known. In this case, the first heat exchanger and the second heat exchanger, which are components of the heat pump cycle, are used.
By installing a heat exchanger in series in the air conditioning duct and controlling a switching valve that switches the flow direction of the refrigerant in this cycle, the first heat exchanger on the upstream side functions as an evaporator during air conditioning in the vehicle interior. Cools the air in the duct,
At the time of heating the vehicle interior, the second heat exchanger on the downstream side functions as a condenser to heat the air in the air conditioning duct.

[0003]

Since the air conditioning duct is provided in the limited space in the vehicle compartment,
The air passage cross-sectional area of the air conditioning duct is small. Considering this point, in order to secure the vehicle interior heating performance in the second heat exchanger, the depth width (width in the ventilation direction) of the second heat exchanger must be set to be somewhat longer.

In order to increase the depth width, the second
It suffices to configure the heat exchanger with a conventionally well-known heater core (heat exchanger through which the cooling water of the vehicle engine flows). However, since the medium flowing inside the heater core is engine cooling water, the pressure resistance of the header tank is not so strong. Therefore, when this heater core is used as a condenser, a large pressure is applied to the header tank having a long depth and the header tank is damaged.

Therefore, as described in US Pat. No. 4,829,780, a plurality of heat exchangers each having a tube and a header tank whose depth width is shorter than that of the heater core are arranged in series in the ventilation direction to form one large heat exchanger group. There is something. Certainly, according to this, since the depth width of the header tank in each heat exchanger is short, the pressure resistance of the header tank becomes strong, and a plurality of heat exchangers are provided adjacent to each other in the depth direction. Therefore, the heating performance is improved.

However, in this case, the number of parts is increased because a plurality of heat exchangers are provided. Further, since the outer shape of the heat exchanger group is different from the outer shape of the heater core, from the mounting surface, the evaporator and the heater core are different from the air conditioning duct of the air conditioner in which the evaporator and the heater core are provided in series in the air conditioning duct. Different air conditioning ducts need to be provided. Therefore, in view of the above problems, the present invention enables a heat exchanger provided in an air conditioning duct to be used as a condenser while having the same outer shape as a conventional heater core and satisfying pressure resistance. With the goal.

[0007]

In order to achieve the above object, in the invention according to claim 1, a plurality of tubes (103) through which a fluid to be heat-exchanged flows, and both ends of the plurality of tubes (103) are provided. A heat exchanger including a header tank (102) that is connected and collects and distributes the heat exchanged fluid, and exchanges heat between the heat exchanged fluid flowing in the tube and an external fluid flowing around the outer periphery of the tube. In the header tank (102), the header plate (10) for fixing the ends of the plurality of tubes (103).
5) and a header cover (106) joined to cover the header plate (105) so as to cover the tube (1) in the flow direction of the external fluid.
03) has a width (t3) of 30 mm or more, and a plate-like member (11) having rigidity inside the header tank (102).
1, 112) are provided, and the plate-shaped members (111, 11)
2) One end surface on one side is fixed to the inner wall surface of the header plate (105), and the other end surface on the other side of the plate-shaped members (111, 112) is fixed to the inner wall surface of the header cover (106). Characterize.

As described in claim 2, claim 1
In the heat exchanger described above, a high-pressure refrigerant may flow as the fluid to be heat-exchanged in the plurality of tubes, and the heat exchanger may be used as a condenser of an air conditioner. Further, as described in claim 3, in the heat exchanger according to claim 1, the plurality of tubes (103) may be a multi-hole flat tube (103) having a large number of fine holes (110).

Further, as described in claim 4, claim 1
The heat exchanger according to claim 1, wherein the plate-shaped members (111, 11)
2) is formed so that substantially the entire circumference of the end face of the plate-shaped member (111, 112) is fixed to the inner wall surface of the header tank (102), and the plate-shaped member (111, 112) is formed.
In addition, an opening (111a) through which the internal fluid passes may be formed.

Further, as described in claim 5, claim 1
A heat exchanger as described above, wherein the header tank (102)
The inner wall surface and the end surface of the plate-shaped member (111, 112) may be fixed by brazing. In the invention according to claim 6, the blower means (5) for generating an air flow, the air conditioning duct (8) for guiding the air from the blower means (5) into the room, and the external drive source (20). A compressor (12) driven by a driving force to suck, compress, and discharge the refrigerant, a condenser (10) for condensing the refrigerant discharged by the compressor (12), and a condenser (10) from the condenser (10). A decompression means (15) for decompressing the refrigerant and an evaporator (provided on the downstream side of the decompression means (15) and on the suction side of the compressor (12) for evaporating the refrigerant from the decompression means (15) ( 9) and, in the air conditioning duct (8),
The evaporator (9) is provided, and the condenser (10) is provided on the air downstream side of the evaporator (9), and the condenser (10) and the air conditioner together with the refrigerant flowing inside the condenser (10). A plurality of tubes (103) for exchanging heat with the air in the duct (8), and the plurality of tubes (103)
A header tank (102) which is connected to both ends of the refrigerant tank and collects and distributes the refrigerant.
Includes a header plate (105) for fixing the ends of the plurality of tubes (103), and the header plate (10).
5) Header cover (1) joined so as to cover it
06) and the width (t3 of the tube (103) in the air flow direction in the air conditioning duct (8).
) Is 30 mm or more, and the header tank (10
2) A plate-shaped member (111, 112) having rigidity inside
Is provided, and one end side of the plate-shaped members (111, 112) is fixed to the inner wall surface of the header plate (105),
The other end of the plate member (111, 112) is fixed to the inner wall surface of the header cover (106).

Further, as described in claim 7, claim 6
In the air conditioner described above, the drive source (20) may be an electric motor (20) driven by electric power from a battery for running an electric vehicle, and the air conditioner may be mounted on the electric vehicle. The reference numerals in the parentheses of the above means indicate the correspondence with the specific means of the embodiments described later.

[0012]

When the heat exchanger is constructed such that the depth width of the tube (width in the flow direction of the external fluid) is 30 mm or more as in the invention described in claims 1 to 5, in the header tank, The depth width is also 30 mm or more. If the depth of the header tank is 30 mm or more,
The header tank has a larger cross-sectional area, and the header tank has a lower pressure resistance.

Therefore, as in the present invention, a plate member having rigidity is provided inside the header tank, one end surface of the plate member is fixed to the inner wall surface of the header plate, and the other end surface is attached to the header cover. By fixing to the inner wall of
It is possible to suppress the deformation of the header cover, which tends to expand due to the internal pressure. Therefore, the pressure resistance of the header tank can be secured.

Further, by setting the depth width of the tube to 30 mm or more, the outer shape of the condenser itself can be made the same as that of the conventional heater core (heat exchanger that heats air by using engine cooling water as a heat source). In this case,
When the evaporator and the condenser of the present invention are provided in series in the air conditioning duct as in the invention according to claim 6, as the air conditioning duct, the air conditioning duct in which the evaporator and the heater core are provided in series as in the conventional case The same can be used. Therefore, the air conditioning duct can be shared with the conventional one.

[0015]

Next, an embodiment of the present invention will be described with reference to the drawings. First, the overall configuration of this embodiment will be described with reference to FIG. In FIG. 1, reference numeral 1 denotes the entire ventilation system of an air conditioner for an electric vehicle, and the main body of this ventilation system 1 is disposed below a vehicle interior instrument panel of the vehicle. The ventilation system 1 is roughly divided into a ventilation unit 2 and an air conditioning unit 3.

An inside / outside air switching box (not shown) is provided on the air upstream side of the blower unit, and an inside air inlet and an outside air inlet (not shown) are formed in this inside / outside air switching box. These inlets are selectively opened / closed by an inside / outside air switching door (not shown). Further, the inside / outside air switching door is driven by a driving means 4 (specifically, a servo motor, see FIG. 2).
Driven by.

The blower unit 2 comprises a centrifugal fan 5, a fan motor 6 for driving the centrifugal fan 5 (see FIG. 2), and a scroll casing 7 which houses the centrifugal fan 5. A duct 8 of the air conditioning unit 3 is connected to the air outlet side portion of the scroll casing 7. An indoor evaporator 9 serving as an air cooling means is arranged on the upstream side of the duct 8, and an indoor condenser 10 serving as an air heating means is arranged on the downstream side of the air. Further, a bypass passage 11 is formed in the duct 8 so that the cold air cooled by the indoor evaporator 9 bypasses the indoor condenser 10.

The indoor evaporator 9 and the indoor condenser 10 together with the compressor 12, the outdoor heat exchanger 13, the pressure reducing devices 14 and 15, and the gas-liquid separator 16 are connected by a pipe 17 to form a well-known refrigeration cycle. It is an exchange. Further, in this refrigeration cycle, bypass pipes 17a and 17b for bypassing the pressure reducing devices 14 and 15, respectively, are formed, and solenoid valves 18 and 19 for opening and closing these pipes are provided on the bypass pipes 17a and 17b, respectively. There is.

The compressor 12 sucks, compresses, and discharges the refrigerant in the refrigeration cycle, and is driven by the electric motor 20 as shown in FIG. The electric motor 20 is provided integrally with the compressor 12 in a sealed case. The electric motor 20 has a rotation speed that is continuously variable under the control of an inverter 22 that is operated by being supplied with power from a vehicle running battery 21.
The refrigerant discharge capacity of the compressor 12 continuously changes due to the change in the rotation speed of the.

The outdoor heat exchanger 13 exchanges heat between the vehicle exterior air and the refrigerant outside the air conditioning duct 8, and is equipped with an outdoor fan 23. Each of the decompression devices 14 and 15 is composed of a capillary tube, the decompression device 14 decompresses and expands the refrigerant from the indoor condenser 10, and the decompression device 15 decompresses and expands the refrigerant from the outdoor heat exchanger 13.

The accumulator 16 stores excess refrigerant in the refrigeration cycle and sends only the gaseous refrigerant to the compressor 12. In the air conditioning duct 8, on the air upstream side of the indoor condenser 10, air for adjusting how much of the air from the indoor evaporator 9 is allowed to flow to the indoor condenser 10 and how much to flow to the bypass passage 11. Mixed door 2
4 are provided. The air mix door 24 is driven by a drive means 25 (specifically, a servo motor, see FIG. 2).

On the air downstream side of the air conditioning duct 8, a face outlet for blowing air toward the upper half of the passenger in the passenger compartment, a foot outlet for blowing air toward the feet of the occupant, and air for the window glass. Defroster outlets (not shown) for ejecting toward the inner surface are formed. These outlets are selectively opened and closed by an outlet switching door (not shown). Further, this outlet switching door is provided with a drive means 26 (specifically, a servo motor, FIG.
Driven).

In FIG. 2, a control panel 27 is provided on the front surface of the passenger compartment, and the control panel 27 has a temperature setter for setting the passenger compartment temperature, an auto switch for setting an automatic air conditioner state, A cooling / heating mode selector switch for switching the cooling / heating mode, which will be described later, is provided. The pipe 17 on the discharge side of the compressor 12 is provided with a high pressure sensor 28 for detecting the high pressure of the refrigeration cycle and a discharge temperature sensor 29 for detecting the discharge side refrigerant temperature of the compressor 12. Further, an outside air temperature sensor 30 for detecting the outside air temperature is provided at an arbitrary position outside the vehicle compartment, and the outdoor heat exchanger 13 is provided with an outdoor heat exchanger sensor 31 for detecting the temperature of the heat exchanger 13. .

The ECU 32 includes the above-mentioned sensors, switches,
The setting device and the actuator are connected, and the device is a well-known device including an A / D converter, a microcomputer, and the like (not shown). The signal from each sensor is
After being A / D converted by the / D converter, it is input to the microcomputer. In the above configuration, when the cooling / heating changeover switch is operated to specify the cooling mode or the defrosting mode, the solenoid valve 18 opens and the solenoid valve 19 closes. The refrigerant discharged from the compressor 12 is the indoor condenser 10
→ Solenoid valve 18 → Outdoor heat exchanger 13 → Decompressor 15 → Indoor evaporator 9 → Accumulator 16 → Compressor 12
That is, the indoor evaporator 9 cools the air in the air conditioning duct 8,
The indoor condenser 10 reheats this cooling air. The reheating amount is adjusted by the opening degree of the air mix door 24.

When the heating / cooling selector switch is operated to specify the heating mode, the solenoid valve 18 is closed and the solenoid valve 19 is opened. The refrigerant discharged from the compressor 12 is the indoor condenser 10 → the pressure reducing device 14 → the outdoor heat exchanger 13 → the solenoid valve 1
The flow is 9 → accumulator 16 → compressor 12. That is, the refrigerant does not flow into the indoor evaporator 9, and the indoor condenser 1
0 heats the air in the air conditioning duct 8. The heating amount is adjusted by the opening degree of the air mix door 24.

By the way, the outside shape of the indoor condenser 10 is the same as that of a conventional heater core (heat exchanger for heating air by using engine cooling water as a heat source). Less than,
The specific structure of the indoor condenser 10 will be described in detail. FIG. 3 is a front view of the indoor condenser 10, and FIG. 4 is a perspective view schematically showing the indoor condenser 10.

As shown in the figure, the indoor condenser 10 comprises a heat exchanging section 101 for exchanging heat with the air in the air conditioning duct 8 and two header tanks 102 connected to both ends of the heat exchanging section 101. Composed. And header tank 102
Fig. 3 Vertical dimension (t1) is 100 to 200 (mm)
In addition, the dimension (t2) from the end to the end of the header tank 102 is set to 120 to 300 (mm).

The heat exchange section 101 is a tube 103 that constitutes a refrigerant passage through which the refrigerant flows, and the fins 1 provided to enhance the heat exchange efficiency of the refrigerant flowing inside the tube 103.
And 04 are alternately laminated. Both ends of the plurality of tubes 103 are connected to the header tank 102.
Is fixed to the header plate 105, and a header cover 106 is joined so as to cover the header plate 105. Caps 107 for closing the header tank 102 are provided at both ends of the header tank 102 in the vertical direction in FIG.

Of the above two header tanks 102, FIG.
The header tank 102 on the right side has a refrigerant inlet pipe 10
8 and the refrigerant outlet pipe 109 are connected to each other, and these are connected to the refrigerant pipe 17, respectively. The tube 103 has a large number of fine holes 110 formed therein as shown in FIG. 5 by extruding a high-temperature aluminum block into a flat mold having a plurality of rods provided therein. A flat tube is formed. Note that FIG. 5 is a sectional view taken along the line AA of FIG. Further, the depth width (width in the air flow direction) t3 of the tube 103 is 30 m.
m and height t4 are 1.5 mm to 3.0 mm.
The depth width of the header tank 102 is 30 mm or more.

The fin 104 is an aluminum plate material having both surfaces clad with a brazing material (material A4045) and formed in a corrugated shape by a fin forming roller. The header plate 105, as shown in FIG.
Both ends of the flat portion 105a are curved. The header plate 105 is formed by press-molding an aluminum plate material in which the brazing material is clad on both sides, and then punching out a plurality of portions of the plate material in an oval shape to form a plurality of burring-shaped tube insertion holes 105b. To be done.

Here, FIG. 6A shows the header plate 10
5 viewed from above (or below) in FIG. 3, FIG. 6 (b)
6 is a view of the header plate 105 as viewed from the inside of the header tank 102, and FIG. 6C is a view of the header plate 105 as viewed in the direction perpendicular to the plane of FIG. The header cover 106
As shown in FIG. 7, an aluminum plate material having the above brazing material clad on both sides is press-molded, and then rectangular openings 1 are formed at a plurality of positions (five in this embodiment) of the plate material.
It is molded by forming 06a by punching. Further, in the header cover 106 of the header tank 102 on the side to which the pipes 108 and 109 are connected, in addition to the opening 106a, the refrigerant inlet pipe 10
8 is formed by punching, and a circular opening 106c that is fitted in the refrigerant outlet pipe 109 is formed by punching.

Further, the flat portion 106d of the header cover 106
Both ends of the curved portion have a curved shape.
At the end of the curved portion 105 of the header plate 105.
A bent portion 106f that fits with c is formed. Further, a total of ten claw portions 10 are provided at the end of the bent portion 106f.
6 g are formed. Here, FIG. 7 shows the opening 10
7B is a view showing the shape of the header cover 106 on the side where 6b and 106c are formed, and FIG. 7A is a view of the header cover 106 seen from above (or below) in FIG.
(B) shows the header cover 106 with the pipe 108,
FIG. 7C shows the header cover 1 viewed from the 109 side.
It is the figure which looked at 06 from the paper surface perpendicular direction of FIG.

The cap 107 is formed by pressing an aluminum plate having both surfaces clad with the brazing material. Further, as shown in FIG. 3, inside the header tank 102, nine plate-shaped members 111 and one plate-shaped member 112 are provided. This plate member 11
1, 112 are provided between the tube insertion holes 105b and 105b of the header plate 105, and two or more and five or less tube insertion holes 105b are interposed between each plate member.

The plate members 111 and 112 are shown in FIG.
As shown in (a) and (b), the outer shape is the header tank 10.
The plate-shaped member 11 has the same shape as the inner cross-sectional shape of No. 2.
The outer circumferences of the outer end surfaces of 1, 112 are in close contact with the inner wall surface of the header tank 102. In addition, these plate-shaped members 1
Claws 111a and 112a, which are fitted to the rectangular opening 106a of the header cover 106, are provided on the reference numerals 11 and 112, respectively.
Is provided. Further, the dimension shown at t5 in FIG. 8, that is, the inner wall surface of the flat portion 105a and the flat portion 1 in the state where the header plate 105 and the header cover 106 are assembled.
The dimension between the inner wall surface of 06d is 19 mm.

The plate-shaped member 112 is formed by pressing an aluminum plate having both surfaces clad with a brazing material, and the plate-shaped member 111 is punched out from the plate-shaped member 112 to form an opening 111b for passing a refrigerant. By molding. It should be noted that this opening 111b is formed at t in FIG.
1 is 100 to 200 (mm), t2 is 120 to 300
The size of the opening 111b is 50 to 100 so that the refrigerant flowing in the indoor condenser 10 having a size of (mm) does not become a resistance when flowing in the header tank 102.
(Mm ² ).

By providing the plate-shaped member 111 having the opening 111b and the plate-shaped member 112 having no opening as shown in FIG. 3, the refrigerant from the refrigerant inlet pipe 108 is discharged from the header tank 102. The plate-shaped member 112 is collected above the plate member 112 in FIG.
The left-side header tank 102 → the tube 103 in FIG. 3 flows in a U-shape, gathers below the plate-shaped member 112 in the right-side header tank 102 in FIG. 3, and flows out from the refrigerant outlet pipe 109.

Next, a method for manufacturing the indoor condenser 10 will be briefly described. First, a plurality of tubes 103 and fins 1
No. 04 and No. 04 are alternately laminated, and this laminated assembly is longitudinally arranged (see FIG. 3).
The heat exchange section 101 is held by an assembling jig
Maintain the laminated state of. While maintaining this laminated state,
The heat exchange portion 101 and the header tank 102 are joined by inserting and fitting the tip end portion of the tube 103 into the tube insertion hole 105b of the header plate 105.

Then, the opening 10 of the header cover 106.
6a includes tabs 111a and 112 of the plate members 111 and 112.
After the header cover 106 is put on the header plate 105 in the state of fitting a, the header cover 10
The claw portion 106g of No. 6 is caulked to join the header cover 106 to the header plate 105. As a result, the plate-shaped members 111 and 112 are temporarily fixed in the header tank 102. Here, FIG. 9 shows a sectional view taken along the line BB of FIG.

Then, the cap 107 is fitted to both ends of the header tank 102, and the cap 107 is joined to the header tank 102 by caulking the claw portions 107a formed on the cap 107. Then, this joined body is carried into a furnace and heated to a temperature equal to or higher than the melting point of the brazing material of the aluminum clad material (for example, 560 ° C to 590 ° C). As a result, the entire outer end surfaces of the plate-shaped members 111 and 112 and the inner wall surface of the header tank 102 are integrally joined by brazing, and the other joining portions are integrally joined by brazing, so that the entire indoor condenser 10 is integrated. Make it a structure. In addition,
Non-corrosive flux is used for brazing.

As described above, the manufacturing of the skeleton structure of the indoor condenser 10 can be completed, and after that, the manufacturing of the indoor condenser 10 can be completed by finishing the surface treatment. As described above, in this embodiment, the depth width of the tube 103 (width in the air flow direction) is 30 mm, and the depth width of the header tank 102 is 30 mm or more.
2 has a structure in which a large pressure is applied to the inner wall surface of the header tank 102.
12 is fixed by brazing to the entire outer end surface of the plate 12, so that one end surface of the plate-shaped members 111 and 112 (see FIG.
Is fixed to the inner wall surface of the header plate 105, and the other end surface (upper end surface in FIG. 8) of the plate members 111 and 112 is the header cover 10.
The header tank 102 is fixed to the inner wall surface of No. 6, and the portion is reinforced, and the pressure resistance of the header tank 102 increases. Therefore, even if the high-pressure refrigerant discharged from the compressor 12 flows into the header tank 102, the header tank 102 can sufficiently withstand this high pressure.

Further, in this embodiment, the depth width of the tube 103 and the header tank 102 is long, and the indoor condenser 10
Since the outer shape of the heater is the same as the outer shape of the conventional heater core, the following can be performed. That is, FIG.
As shown in, the indoor evaporator 9 is always functioned as an evaporator, while the indoor condenser 10 is used as a heater core into which hot water heated by the combustion of the fuel in the combustion tank 40 by the combustion heater 41 flows. This can also be realized by using the same air conditioning duct 8.

(Other Embodiments) In the above embodiment, the tabs 111a and 112a are provided on the plate-like members 111 and 112 only on the header cover 106 side, but the tabs are also provided on the header plate 105 side. The header plate 105 may also be provided with an opening for fitting with the claw portion. In the above embodiment, the flat tube 1 is placed between the two header tanks 102.
03 connected in parallel, and each tube 1
The present invention has been applied to a condenser of the type in which corrugated fins 104 are provided between 03, but a plurality of circular pipes are passed through a plurality of circular openings formed in plate fins. The present invention can also be applied to a condenser of the type in which the header tanks 102 are provided at both ends of a plurality of pipes.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention.

FIG. 2 is a block diagram of a control system of the above embodiment.

FIG. 3 is a front view of the indoor condenser 10 of the above embodiment.

FIG. 4 is a schematic perspective view of the indoor condenser 10.

5 is a cross-sectional view taken along the line AA of FIG.

FIG. 6 is a diagram showing a header plate 105.

7 is a diagram showing a header cover 106. FIG.

8A is a front view of the plate-shaped member 111, and FIG. 8B is a front view of the plate-shaped member 112.

9 is a sectional view taken along the line BB of FIG.

FIG. 10 is an overall configuration diagram of an example in which the indoor condenser 10 is used as a heater core.

[Explanation of symbols]

 5 Centrifugal Fan (Blower) 8 Air Conditioning Duct 9 Indoor Evaporator (Evaporator) 10 Indoor Condenser (Condenser) 12 Compressor 15 Pressure Reduction Means (Decompression Device) 20 Electric Motor (External Drive Source) 102 Header Tank 103 Tube 105 header plate 106 header cover 110 holes 111, 112 plate member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Ishikawa 1-1-1, Showa-cho, Kariya city, Aichi prefecture Nihon Denso Co., Ltd.

Claims (7)

[Claims] 1. A plurality of tubes in which a fluid to be heat-exchanged flows, and a header tank connected to both ends of the plurality of tubes to collect and distribute the fluid to be heat-exchanged,
A heat exchanger for exchanging heat between the fluid to be heat-exchanged flowing in the tube and an external fluid flowing in the outer periphery of the tube, wherein the header tank fixes a header plate for fixing ends of the plurality of tubes, and And a header cover joined to cover the header plate so that the width of the tube in the flow direction of the external fluid is 3
A plate member having a rigidity of 0 mm or more is provided inside the header tank, one end surface of the plate member is fixed to an inner wall surface of the header plate, and the other end surface of the plate member is A heat exchanger characterized by being fixed to the inner wall surface of the header cover. 2. The heat exchanger according to claim 1, wherein a high-pressure refrigerant flows as the heat exchanged fluid in the plurality of tubes and is used as a condenser of an air conditioner. 3. The heat exchanger according to claim 1, wherein the plurality of tubes are multi-hole flat tubes having a large number of fine holes. 4. The plate-shaped member is formed such that substantially the entire circumference of the end face of the plate-shaped member is fixed to the inner wall surface of the header tank, and the internal fluid passes through the plate-shaped member. The heat exchanger according to claim 1, wherein an opening portion is formed. 5. The heat exchanger according to claim 1, wherein the inner wall surface of the header tank and the end surface of the plate member are fixed by brazing. 6. A blower that generates an air flow, an air-conditioning duct that guides the air from the blower into the room, and a compressor that sucks, compresses, and discharges a refrigerant driven by a driving force from an external drive source. Machine, a condenser for condensing the refrigerant discharged by the compressor, a decompression means for decompressing the refrigerant from the condenser, and a downstream side of the decompression means and on the suction side of the compressor, the decompression An evaporator for evaporating the refrigerant from the means, the evaporator is provided in the air conditioning duct, the condenser is provided on the air downstream side of the evaporator, the condenser is its own. A plurality of tubes that perform heat exchange between the refrigerant flowing inside and the air in the air conditioning duct, and a header tank that is connected to both ends of the plurality of tubes and that collects and distributes the refrigerant, the header tank, A header plate for fixing the ends of a plurality of tubes, and a header cover joined so as to cover and cover the header plate, wherein the width of the tube in the air flow direction in the air conditioning duct is 30 mm or more. A rigid plate member is provided inside the header tank, one end side of the plate member is fixed to an inner wall surface of the header plate, and the other end side of the plate member is an inner wall surface of the header cover. An air conditioner characterized by being fixed. 7. The air conditioner according to claim 6, wherein the drive source is an electric motor driven by electric power from a running battery of the electric vehicle, and the air conditioner is mounted on the electric vehicle. .