JP2004061076A - Condenser and air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To satisfy conditions for improving the condensation performance of a condenser. <P>SOLUTION: An air conditioner for vehicles has an evaporator 33, a compressor 31, a liquid reception section 32, refrigerant piping 34, and the condenser 1. In the air conditioner for vehicles, header pipes 2, 3 for passing a refrigerant are arranged at both the side end sections of the condenser 1. A projection section 21 or an uneven section is provided in the header pipes 2, 3 and on the outer surface of the header pipes 2, 3, and an outer surface area is expanded, thus increasing the amount of heat exchange and improving the condensation performance of the condenser 1. Additionally, a projection on the outer surface is provided between the side of a radiator 54 and the front from both the ends of the condenser 1, thus shielding high-temperature air from an engine room 51 and providing the air conditioner for vehicles for reducing expenses for mounting countermeasures for wind obstruction. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a condenser and a structure of a vehicle air conditioner using the condenser.
[0002]
[Prior art]
FIG. 9 is a schematic perspective view showing a condenser of a conventional vehicle air conditioner. FIG. 10 is a development view showing main components of the present condenser. FIG. 11 is a schematic diagram showing a state in which a conventional vehicle air conditioner is mounted on a vehicle and a flow of cooling air. In the figure, a condenser 1 has a pair of left and right header pipes 2 and 3 and a number of tube insertion holes 11 formed on one side of the pair of header pipes 2 and 3 facing each other. And a large number of tubes 4 having a rectangular cross section connecting the pair of header pipes 2 and 3 and being closely inserted between adjacent tubes 4. Corrugated fins 5, side plates 6, 7 mounted on the outer side of the corrugated fins 5 located on the upper and lower outermost sides, and refrigerant inlet pipes 8 arranged through mounting holes 12 formed on one side of the header pipe 2; A refrigerant outlet pipe 9 penetrating through a mounting hole drilled in the side surface of the header pipe 3 (a mounting hole of the header pipe 3 is not shown), caps 10 disposed at both ends of the header pipes 2 and 3, and the like. Thus constructed, all are assembled by integrally brazing.
[0003]
The refrigerant that has entered the header pipe 2 from the refrigerant inlet pipe 8 enters the header pipe 3 through each of the tubes 4 having a plurality of refrigerant passages connecting the header pipe 2 and the header pipe 3, and the refrigerant outlet pipe installed therein. It flows out of 9. In addition, a partition plate may be provided in the middle of the header pipes 2 and 3 so that the refrigerant flowing from the refrigerant inlet pipe 8 flows through the tubes 4 meandering several times and flows out from the refrigerant outlet pipe 9. In this case, the inlet pipe 8 and the outlet pipe 9 for the refrigerant can be provided on the same header pipe, or can be provided on different header pipes. The refrigerant exchanges heat with the cooling air passing between the corrugated fins 5 in the process of flowing through the tubes 4. In FIG. 11, a vehicle constituted by a compressor 31 driven by a vehicle engine 53, a condenser 1, a liquid receiver 32 as a liquid receiver, an evaporator 33, a refrigerant pipe 34 connecting these, and the like. In the air conditioner for use, the condenser 1 is disposed in front of a radiator 54 for a vehicle, and is cooled by forced air by a cooling fan 55.
[0004]
[Problems to be solved by the invention]
By the way, in the condenser 1, as a method of improving the condensation performance, it is usually considered that the outer size of the condenser 1 is increased, or the fin pitch of the corrugated fins 5 is reduced to increase the surface area of the corrugated fins 5. Can be
[0005]
However, as shown in FIG. 11, since the condenser 1 is installed in the engine room 51 of the vehicle 50, the mounting space is restricted, and the external size cannot be increased unnecessarily. Further, when the fin pitch of the corrugated fins 5 is reduced, the pressure loss on the air side of the condenser 1 increases, the amount of cooling air passing by the cooling fan 55 decreases, the power consumption of the cooling fan motor increases, and the like. There are disadvantages.
[0006]
Then, this invention is made | formed in view of the above, and an object of this invention is to improve the condensation performance of a condenser.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a condenser according to the present invention is characterized in that a pipe through which a refrigerant passes is disposed at both end portions of the condenser, and a heat radiation projection is provided on an outer surface of the pipe. I do. By providing the projections for heat dissipation on the surface of the pipe in this way, the outer surface area of the pipe is increased, and the heat transfer area can be increased with a limited storage space. As a result, the amount of heat exchange in the pipe portion can be increased, and condensing performance can be improved.
[0008]
Further, in the condenser according to the present invention, a pipe through which the refrigerant passes is disposed at both end portions of the condenser, and a heat-radiating projection is provided on the outer surface of the pipe in a radial direction in the axial direction of the pipe. Features. Thus, by providing the projections for heat radiation on the surface of the pipe in a substantially radial manner, the outer surface area of the pipe is increased, and the heat transfer area can be increased with a limited storage space. As a result, the amount of heat exchange in the pipe portion can be increased, and condensing performance can be improved. Since the projections for heat radiation are provided in the axial direction, the pipe can be manufactured at low cost by extrusion molding.
[0009]
Here, the shape of the projection for heat dissipation in the cross section of the pipe is not only a substantially rectangular shape but also a curved shape, a wavy shape, a trapezoidal shape, a gear shape, an L shape, a T time shape, and a gap between adjacent projections. Including a shape narrower than the width of the protrusion. In addition, the protrusion may be provided with a groove for further improving the heat radiation, so that the outer surface area is increased. Further, a combination of these shapes may be used (the same applies hereinafter). Further, the term “substantially radial” includes a state in which the projection extends in all directions from the center, and also includes a state in which there is no protrusion in a part of the circumferential direction. In addition, a case where only one portion is projected is included. Further, this also includes a state in which the lens is attached at an angle from the center to the attachment surface.
[0010]
Further, the condenser according to the present invention is provided with a pipe communicating with the inside of the heat exchange part on both sides of the heat exchange part through which the refrigerant passes, and on the outer surface of the pipe, A plurality of protrusions are provided continuously or intermittently in the substantially axial direction of the pipe.
[0011]
In the condenser, the heat exchange portion is constituted by, for example, a tube through which a refrigerant passes, and a corrugated fin that is in close contact with the tube, and the pipe portion does not have a heat exchange function. This allows the pipe portion to have a heat exchange function by enlarging the outer surface area of the pipe. Therefore, the main heat exchange portion can be reduced or the heat exchange amount can be increased in a limited space.
[0012]
Further, the condenser according to the present invention is characterized in that a pipe through which a refrigerant passes is disposed at both ends of the condenser, and a ring-shaped projection is provided on an outer surface of the pipe in a direction crossing the pipe axis. .
[0013]
As described above, since the ring-shaped protrusion is provided on the pipe through which the refrigerant passes, the outer surface area of the pipe is increased, and the heat transfer area can be increased with a limited storage space. As a result, the amount of heat exchange in the pipe section can be increased even in a limited space.
[0014]
Further, in the condenser according to the present invention, a pipe through which the refrigerant passes is disposed at both end portions of the condenser, and on the inner surface of the pipe, a heat-radiating projection or a heat-radiating uneven portion is provided in an axial direction of the pipe. The inner surface area of the pipe is enlarged.
[0015]
As described above, since the protrusion is provided on the inner surface of the pipe, the heat transfer area can be increased without changing the outer shape. Thereby, the amount of heat exchange in the pipe portion can be increased. Further, since the heat exchange amount can be increased without changing the outer shape, the heat transfer efficiency can be improved in a limited storage space.
[0016]
Further, in the condenser according to the present invention, a pipe through which the refrigerant passes is disposed at both end portions of the condenser, and on the outer surface of the pipe, projections for heat radiation are provided in a radial direction in the axial direction of the pipe, and A heat radiating projection or a heat radiating uneven portion is provided on the inner surface of the pipe in the axial direction of the pipe.
[0017]
As described above, since the projections or the irregularities are provided on the inner and outer surfaces of the pipe, the inner and outer surface areas of the pipe can be further increased. Therefore, the heat transfer area can be further increased in the limited storage space, and the heat exchange amount in the pipe portion can be increased in the limited space.
[0018]
Further, an air conditioner for a vehicle according to the present invention includes an evaporator, a compressor, a liquid receiving part, a refrigerant pipe, and the condenser described above, and further includes a pipe for the condenser, A projection is provided at least between the rear side and the front part. As described above, since the inner and outer surface areas of the pipe can be increased by using the condenser, the condensation performance can be improved. Obtainable.
[0019]
Also, in the condenser mounted on the vehicle, if the pitch of the corrugated fins is reduced in order to secure the heat transfer area, the pressure loss on the air side of the condenser increases, and the amount of cooling air passing by the cooling fan decreases, There are disadvantages such as an increase in power consumption of the fan motor. However, in the present invention, since the heat transfer area of the pipe of the condenser is increased, it is not necessary to reduce the pitch of the corrugated fins. Therefore, the amount of cooling air passed by the cooling fan and the power consumption of the cooling fan motor do not change.
[0020]
Further, the vehicle air conditioner according to the present invention has an evaporator, a compressor, a liquid receiving part, a refrigerant pipe, and a condenser, and the condenser is installed at a front part of a radiator for a vehicle. Further, the condenser pipe is provided with a projection on the front side of the radiator and on the rear side of the condenser.
[0021]
In the condenser air conditioner, in the vehicle air conditioner, a projection is further provided on the front side of the radiator and on the rear side of the condenser, so that the condensing performance is improved by increasing the surface area of the pipe, and from the engine room. Hot air flowing to the front of the condenser and radiator can be blocked. Thus, it is possible to prevent the radiator from deteriorating in condensation performance due to suction of high-temperature air.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings. It should be noted that the present invention is not limited by the embodiment. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same. Further, for the same configuration as that described in the conventional example, the description will be omitted and the reference numerals will be unified.
[0023]
(Embodiment 1)
FIG. 1 is a side view (a) and a top view (b) of a header pipe of a condenser according to Embodiment 1 of the present invention. The header pipe of the condenser according to the first embodiment is characterized in that heat-radiating projections are provided radially on the outer surface of the header pipe in the axial direction of the pipe. In the figure, a plurality of protrusions 21a are formed on the outer surface of the header pipe 2 in a range where the tube insertion hole 11 is not formed so as to radiate outward from the upper end to the lower end. The inside of the header pipe 2a is a refrigerant passage 23a. The cross section of the projection 21a is rectangular, and the outer surface area of the header pipe 2 is enlarged by the plurality of projections 21a, so that the heat radiation performance of the condenser is improved. It is desirable that the material of the projections 21a is the same as that of the header pipe 2 or has high thermal conductivity. As such a material, it is preferable to use a metal material generally considered to have good thermal conductivity, and particularly, aluminum, an aluminum alloy, copper, and the like are preferable.
[0024]
The projection 21a is formed in a molding die of the header pipe 2 in a projection shape, and is integrally formed at the time of extrusion molding. In this way, the header pipe 2 can be manufactured at low cost. Further, the protrusion 21a can be attached to the header pipe 2 by brazing or welding. Although not shown, a projection 21a may be provided between the tube insertion holes 11 so as not to block the tube insertion holes 11. Thereby, the outer surface area can be further increased. At that time, since the tube insertion hole 11 is formed by machining, the projection 21a is formed on the entire circumference of the header pipe, and then the tube insertion hole 11 is provided by machining at a predetermined position.
[0025]
Hereinafter, modified examples of the shape of the projection will be described. FIG. 2 is an explanatory diagram illustrating a protrusion according to a modification of the first embodiment. FIG. 1A is a top view of a header pipe 2 of a condenser having a trapezoidal projection. As described above, when the cross-sectional shape of the projection 21 is trapezoidal, the surface area is somewhat smaller than that of the rectangular shape, but the integral molding by extrusion is easier by that much. FIG. 2B is a top view of the header pipe 2 of the condenser in which the protrusion 21 has a wavy shape. When the shape of the projection 21 is corrugated, since there is no corner portion as compared with a rectangular shape, integral molding by extrusion is facilitated accordingly. FIG. 3C is a top view of the header pipe 2 of the condenser in which the shape of the protrusion 21 is L-shaped. If the shape of the projection 21 is L-shaped, the surface area can be increased when the external dimensions when the projection 21a as shown in FIG. 1 are attached to the header pipe 2 are the same, so that the heat radiation performance is further improved. Can be.
[0026]
FIG. 4D is a top view of the header pipe 2 of the condenser in which the shape of the protrusion 21 is T-shaped. If the shape of the projections 21 is T-shaped, the surface area can be increased when the external dimensions are the same when the projections 21 are attached to the header pipe 2 as shown in FIG. Can be done. FIG. 7E is a top view of the header pipe 2 according to another modification. The shape of the projection 21 is such that the gap S1 between the adjacent projections 21 is smaller than the width S2 of each projection 21, thereby improving the strength as compared with the conventional header pipe 2 and further increasing the surface area. Can be improved. FIG. 1F is a top view of the header pipe 2 of the condenser in which the protrusion 21 is provided with the groove 24. Providing the groove 24 in the projection 21 further increases the surface area and improves the heat radiation performance. The groove 24 may be provided in the header pipe 2, or the groove 24 may be provided in a protrusion having a rectangular or trapezoidal cross section.
[0027]
FIG. 7G is a top view of the header pipe 2 according to another modification. As described above, when the protrusion 21 is attached to the mounting surface at an angle from the center of the header pipe 2, when the outer dimensions when the protrusion 21 a as shown in FIG. Since it can be large, the heat radiation performance can be improved. FIG. 7H is a top view of the header pipe 2 according to another modification. As described above, when the projection 21 has a curved surface, the surface area can be increased when the external dimensions are the same when the projection 21a is attached as shown in FIG. 1, so that the heat radiation performance can be improved. Although not shown, if the protrusion has a gear shape, the surface area is somewhat smaller than that of a rectangular shape, but the integral molding by extrusion is easier by that much. Although not shown, any combination of two or more of the above shapes is more effective in improving heat dissipation efficiency.
[0028]
(Embodiment 2)
FIG. 3 is a side view (a) and a top view (b) of a header pipe of a condenser according to Embodiment 2 of the present invention. The condenser according to the second embodiment has substantially the same configuration as that of the condenser according to the first embodiment in that a projection is provided on the outer surface of the header pipe, but the projection is positioned with respect to the axis of the header pipe. The difference is that they are provided inclined. The other configuration is the same as that of the first embodiment, and thus the same reference numerals are given and the description is omitted.
[0029]
In the figure, a plurality of projections 21b are continuously or intermittently inclined at a predetermined angle with respect to the axial direction of the header pipe 2 on the outer surface of the header pipe 2 in a range where the tube insertion hole 11 is not formed. Is provided. In addition, since it is formed so as to be inclined with respect to the axial direction of the header pipe, drawing is difficult, and it is preferable to form the projection 21b by brazing or welding. The inside of the header pipe 2 becomes a refrigerant passage 23b. Since a plurality of projections 21b are formed on the outer surface of the header pipe 2, the outer surface area of the header pipe 2 is increased, and the heat radiation performance of the condenser is improved. It is desirable that the material of the protrusion 21b is the same as that of the header pipe 2 or has high conductivity. Note that it goes without saying that the protrusion described in the first embodiment can be applied to the protrusion according to the second embodiment.
[0030]
(Embodiment 3)
FIG. 4 is a side view (a) and a top view (b) of a header pipe of a condenser according to Embodiment 3 of the present invention. The condenser according to the second embodiment has substantially the same configuration as the condenser according to the first or second embodiment in that a protrusion is provided on the outer surface of the header pipe, but the protrusion has a ring shape. Is different. Other configurations are the same as those in the first or second embodiment, and therefore, are denoted by the same reference numerals and description thereof will be omitted.
[0031]
In the figure, a number of tube insertion holes 11 are drilled on one outer side surface of the header pipe 2 of the condenser, and a ring-shaped projection 21c is formed on the outer surface of each intermediate portion of the adjacent tube insertion holes 11 by a header pipe. 2 is fitted closely. And the inside of header pipe 2 serves as refrigerant passage 23c. Since a plurality of ring-shaped projections 21c are closely attached to the outer surface of the header pipe 2, the outer surface area of the header pipe 2 is increased, and the heat radiation performance of the condenser is improved accordingly.
[0032]
It is desirable that the material of the protrusion 21c is the same as the material of the header pipe 2 or has high conductivity. Although not shown, the ring-shaped protrusion 21c may have a disc shape or a disc shape with a hole. Further, the yield of the plate material when the ring-shaped projection 21c is extracted by a press is not very good. Further, when the ring-shaped projection 21c is inserted into the header pipe 2, it may be damaged. Therefore, when the ring-shaped protrusion 21c is divided and attached to the header pipe 2, the retention of the member is improved, and no damage is caused when the member is inserted into the header pipe 2.
[0033]
(Embodiment 4)
FIG. 5 is an explanatory diagram showing a condenser header pipe according to Embodiment 4 of the present invention. The condenser according to the fourth embodiment has substantially the same configuration as the condenser according to the first to third embodiments in that a protrusion is provided on the header pipe, but the protrusion or the unevenness is formed on the inner surface of the header pipe. The difference is that the unit is provided. Other configurations are the same as those in the first or second embodiment, and therefore, are denoted by the same reference numerals and description thereof will be omitted.
[0034]
In the figure, a number of tube insertion holes 11 are drilled on one outer side surface of the header pipe 2 of the condenser, and a radiation projection 22d is provided on the inner surface of the header pipe 2 in the axial direction of the header pipe 2. The inside of the header pipe 2 is a refrigerant passage 23d. Since a plurality of heat radiation projections 22d are provided on the inner surface of the header pipe 2, the inner surface area of the header pipe 2 is increased, and the heat radiation performance of the condenser is improved accordingly.
[0035]
The projection 22d is provided with a projection shape on a molding die of the header pipe 2, and is integrally formed during extrusion molding. In this way, the header pipe 2 can be manufactured at low cost. Further, in addition to the projection 22d for heat dissipation, a recess 25 may be provided on the inner surface of the header pipe 2. That is, the protrusion 22d may be provided on the reference inner surface of the head pipe and the recess 25 may be formed on the reference inner surface, and the protrusion 22d and the recess 25 may be used to increase the inner surface area. Thereby, the heat radiation performance of the condenser can be further improved. The shape of the heat radiating projection or the heat radiating uneven portion may be a substantially rectangular shape, a trapezoidal shape, a gear shape, or a waveform.
[0036]
(Embodiment 5)
FIG. 6A is an explanatory diagram showing a header pipe 2 of a condenser according to Embodiment 5 of the present invention. The condenser according to the fifth embodiment is similar to the condenser according to the first, second or fourth embodiment in that a projection is provided on the header pipe 2, but the projection is simultaneously formed on the inner and outer surfaces of the header pipe 2. The difference is that the projection 22e is provided on the reference inner surface of the head pipe 22e or 22e and the recess 25 is provided on the reference inner surface. Other configurations are the same as those of the first, second, or fourth embodiment, and thus the same reference numerals are given and the description thereof is omitted.
[0037]
As shown in the figure, a heat radiating projection 21e is provided in the axial direction of the header pipe 2 substantially radially, and a heat radiating projection 22e or a head is formed on the inner surface of the header pipe 2 in the axial direction of the header pipe 2. A projection 22e is provided on the reference inner surface of the pipe, and a recess 25 is provided on the reference inner surface. The inside of the header pipe 2 becomes a refrigerant passage 23e. Since a plurality of projections 22e or recesses 25 are provided on the inner and outer surfaces of the header pipe 2, the inner and outer surface areas of the header pipe 2 are enlarged. Thereby, the heat radiation performance of the condenser is further improved, and the condensation performance can be further improved. In addition, when the protrusions 21e are provided on the outer surface of the header pipe 2 where the recess 25 is provided, a condenser having excellent heat radiation properties in the header pipe 2 can be provided. Here, the header pipe 2 having the projections 21e, 22e and the concave portion 25 can be manufactured at low cost by integrally extruding. Note that the protrusion described in Embodiment 2 or 4 can be applied to the protrusion according to Embodiment 5. FIG. 6B is a top view according to a modified example of the header pipe. This has a shape like the header pipe itself waving. By doing so, the inner and outer surface areas are larger than the cylindrical header pipe. Thereby, the heat radiation performance of the condenser is further improved, and the condensation performance can be further improved. Further, by providing the projection 21e on the header pipe, further improvement in condensation performance can be expected.
[0038]
(Embodiment 6)
FIG. 7A is an explanatory diagram showing a vehicle air conditioner according to Embodiment 6 of the present invention. Normally, the condenser 1 of the vehicle air conditioner mounted on the front part of the vehicle 50 is exposed to outside air introduced from the front of the vehicle 50 by the traveling wind of the vehicle 50 or a cooling fan. The header pipe 2 is provided with a positive heat exchange function by incorporating the header pipe 2 having a plurality of heat radiation projections 21 having an increased outer surface area for heat exchange with the outside air into the condenser 1. Since the condensation of the refrigerant is promoted by this heat exchange function, the condensation performance of the entire condenser 1 can be further improved. Since this vehicle air conditioner employs the condenser 1 having improved condensation performance, the cooling performance is improved as compared with the conventional case. Therefore, power consumption can be reduced, and the fuel efficiency of the vehicle 50 can be improved.
[0039]
Also, not all of the air from outside the vehicle whose temperature has increased after passing through the condenser 1 is exhausted from the engine room 51. In the conventional vehicle, a part of the high-temperature air flows backward to the front part of the condenser 1 as shown by a dotted arrow 61 in FIG. In order to prevent the performance of the condenser 1 from deteriorating due to the re-suction of the high-temperature air, a windshield 41 such as a sponge is often attached to the condenser 1 in a conventional vehicle. For this reason, there has been a problem that the cost is increased due to the addition of parts and the cost of mounting them.
[0040]
As shown in FIG. 7 (b), on the outer surface of the header pipe 3, a heat radiation projection 21 is provided between the rear outer side of the condenser 1 and the front inner side (the area indicated by A in the figure) via both ends. If so, the heat radiation projection 21 functions not only as a heat radiation means but also as a wind shield plate, and prevents the high-temperature air passing through the condenser 1 from flowing around to the front surface of the condenser 1 and being sucked again. Here, the front and the front of the condenser 1 indicate the direction of travel of the vehicle 50 and the surface facing the direction of travel of the vehicle 50. In order to prevent high-temperature air from flowing in, it is preferable that the heat radiation projections 21 be attached between both ends of the condenser 1 and the traveling direction of the vehicle 50 (the area indicated by B in the figure).
[0041]
Therefore, the condenser 1 incorporating the header pipes 2 and 3 with the heat radiating projections 21 can enhance the condensation function by a high heat exchange function, and can reduce the cost of mounting the windproof components on the front of the condenser 1. Cost can be reduced.
[0042]
(Embodiment 7)
FIG. 8 is an explanatory diagram showing a vehicle air conditioner according to Embodiment 7 of the present invention. The vehicle air conditioner according to the seventh embodiment is similar to the vehicle air conditioner according to the sixth embodiment in that the condenser 1 according to the first, second, or fifth embodiment is a part of the configuration. 1 in that a projection 21 is provided on the front side of the radiator 54 and on the rear side of the condenser 1. Other configurations are the same as those in the sixth embodiment, and therefore are denoted by the same reference numerals and description thereof will be omitted.
[0043]
The condenser 1 of the vehicle air conditioner mounted on the front of the vehicle 50 is often installed in front of the radiator 54, that is, in front of the vehicle 50 in the traveling direction. This is because the temperature of the refrigerant of the vehicle air conditioner is lower than the temperature of the refrigerant of the radiator 54, and the air conditioner is arranged so that heat exchange can be performed efficiently in a limited space. The condenser 1 of the vehicle air conditioner is exposed to outside air introduced from the front of the vehicle by a vehicle running wind or a cooling fan. The header pipe 2 is provided with a positive heat exchange function by incorporating the header pipe 2 having a plurality of heat radiation projections 21 having an increased outer surface area for heat exchange with the outside air into the condenser 1. Since the condensation of the refrigerant is promoted by this heat exchange function, the condensation performance of the entire condenser 1 can be further improved. Since this vehicle air conditioner employs the condenser 1 having improved condensation performance, the cooling performance is improved as compared with the conventional case. Therefore, this vehicle air conditioner requires less power consumption and contributes to improving the fuel efficiency of the vehicle 50.
[0044]
Further, in the process of passing through the condenser 1 and the radiator 54, all of the air that has been subjected to heat exchange and the temperature of which has increased is not exhausted from the engine room 51, and a part of the air is indicated by a solid line arrow 62 in FIG. Then, the air flows back into the gap between the condenser 1 and the hot air is sucked again. In order to prevent the performance of the radiator 54 from deteriorating due to the re-suction of the high-temperature air, the windshield means 42 made of a simple material such as a sponge is often attached to the condenser 1 or the radiator 54. For this reason, there has been a problem that the cost is increased due to the addition of parts and the cost of mounting them.
[0045]
Therefore, as shown in FIG. 8, in the header pipe 2 in which a plurality of heat radiation projections 21 are mounted and heat exchange with outside air is enlarged, the projections 21 are provided in the gap between the condenser 1 and the radiator 54. The projections 21 also function as wind shields, and prevent high-temperature air that has passed through the condenser 1 and the radiator 54 from flowing around to the front of the radiator 54 and the condenser 1 and being sucked again. Therefore, the condenser 1 incorporating the header pipes 2 and 3 with the heat-radiating projections 21 performs efficient heat exchange to improve the condensation capacity, and also shields the gap between the condenser 1 and the radiator 54 from wind. Cost reduction can be achieved by reducing the cost of mounting countermeasure parts.
[0046]
【The invention's effect】
As described above, in the condenser of the present invention, a positive heat exchange function is given to the pipe by increasing the outer surface area and / or the inner surface area of the pipe, and the condensation performance of the entire condenser is improved.
[0047]
Further, in the vehicle air conditioner of the present invention, it is possible to provide a vehicle air conditioner having a high condensation effect by the condenser, and to prevent high-temperature air from the engine room from entering the front part of the condenser. The performance of the vessel can be prevented from deteriorating. Similarly, in the vehicle air conditioner of the present invention, high-temperature air from the engine room can be prevented from entering the front portions of the radiator and the condenser, so that the performance of the radiator can be prevented from deteriorating.
[Brief description of the drawings]
FIG. 1 is a side view and a top view of a first embodiment of a header pipe according to the present invention.
FIG. 2 is a modified example of the first embodiment of the header pipe according to the present invention.
FIG. 3 is a side view and a top view of a second embodiment of the header pipe according to the present invention.
FIG. 4 is a side view and a top view of a third embodiment of the header pipe according to the present invention.
FIG. 5 is a sectional view of a fourth embodiment of a header pipe according to the present invention.
FIG. 6 is a sectional view of a fifth embodiment of the header pipe according to the present invention.
FIG. 7 is a vehicle mounting state diagram of the vehicle air conditioner using the condenser according to the present invention.
FIG. 8 is a vehicle mounting state diagram of a vehicle air conditioner using the condenser according to the present invention.
FIG. 9 is a schematic perspective view of a condenser.
10 is an exploded view of main components of the condenser shown in FIG.
FIG. 11 is a schematic diagram showing a state in which a vehicle air conditioner is mounted on a vehicle and a flow of cooling air.
[Explanation of symbols]
1 condenser
2, 3 header pipe
21 Projection or uneven part
22 Projection
24 grooves
25 recess
31 Compressor
32 Liquid receiving part
33 evaporator
34 refrigerant piping
51 Engine room
54 radiator

Claims (8)

A condenser, wherein a pipe through which a refrigerant passes is disposed at both end portions of the condenser, and a radiating projection is provided on an outer surface of the pipe. A condenser, wherein a pipe through which a refrigerant passes is disposed at both end portions of the condenser, and heat radiation projections are provided on the outer surface of the pipe in a radial direction in the axial direction of the pipe. On both sides of the heat exchange portion through which the refrigerant passes, pipes communicating with the inside of the heat exchange portion are provided, and on the outer surface of the pipe, a projection that is joined to the outer surface is continuously or intermittently provided. A condenser provided substantially in the axial direction. A condenser, wherein a pipe through which a refrigerant passes is disposed at both ends of the condenser, and a ring-shaped projection is provided on an outer surface of the pipe in a direction crossing the pipe axis. A condenser, wherein a pipe through which a refrigerant passes is disposed at both end portions of the condenser, and a heat-radiating projection or a heat-radiating uneven portion is provided on an inner surface of the pipe in an axial direction of the pipe. A pipe through which the refrigerant passes is disposed at both end portions of the condenser, and a heat-radiating projection is provided on the outer surface of the pipe in a radial direction in the axial direction of the pipe,
A condenser characterized in that a heat radiating projection or a heat radiating uneven portion is provided on an inner surface of the pipe in an axial direction of the pipe. In an air conditioner for a vehicle having an evaporator, a compressor, a liquid receiving part, a refrigerant pipe, and a condenser,
The condenser is the condenser according to any one of claims 1 to 6, further comprising a condenser pipe having at least a rear outer side of the condenser via both ends and a front inner side. An air conditioner for a vehicle, wherein a projection is provided between the air conditioners. In an air conditioner for a vehicle having an evaporator, a compressor, a liquid receiving part, a refrigerant pipe, and a condenser,
The condenser according to claim 7 is installed at a front portion of a radiator for a vehicle, and further, a pipe is provided with a projection on a front side of the radiator and a rear side of the condenser. An air conditioner for a vehicle.

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