JP4085217B2 - Heat exchanger - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat exchange device, and more particularly, to a heat exchange device that is applied to an air conditioning facility installed in, for example, an automobile or a house, and includes a condenser and a liquid receiver. It is.
[0002]
[Prior art]
In general, as shown in FIG. 10, an air conditioning system used in an air conditioner such as an automobile or a house has a compressor a, a condenser b, a liquid receiver c, an expansion valve d, and an evaporator e through a pipe f. What is connected is known. In the air conditioning system AC configured as described above, the high-temperature and high-pressure gaseous heat medium discharged from the compressor a exchanges heat with a heat exchange fluid such as air while passing through the condenser b. By releasing latent heat, it begins to condense and liquefy. The high-temperature heat medium liquefied in this way is gas-liquid separated while temporarily stored in the liquid receiver c, and only the liquid is sent to the expansion valve d, and is injected from a small hole (not shown) by the expansion valve d. Is adiabatically expanded to form a low-temperature and low-pressure mist that is sent to the evaporator e.
[0003]
In the evaporator e, the heat medium evaporates and vaporizes by exchanging heat with a heat exchange fluid such as air to absorb latent heat. The low-temperature and low-pressure heat medium thus vaporized is sent to the compressor a and subjected to adiabatic compression, becomes a high-temperature and high-pressure gaseous heat medium, and is sent again to the condenser b. By repeating such a series of cycles, the air conditioning system AC can be used for cooling and heating.
[0004]
In the air conditioning system AC, as shown in FIG. 11, the condenser b has a plurality of heat exchange pipes h installed between the pair of header pipes g1 and g2, and corrugated fins i, for example, between the heat exchange pipes h. The liquid receiver c is connected to one header pipe g1 (left side in FIG. 11) by brazing. In this case, as shown in FIG. 12, the receiver c is provided with a stay j for connecting to the header pipe g1, and an arcuate mounting surface k formed at the tip of the stay j is used as the header. The pipe g1 is in contact with an appropriate position on the outer side surface and connected by brazing.
[0005]
[Problems to be solved by the invention]
However, since the liquid receiver c is generally formed with a larger diameter than the header pipe g1 in order to increase the gas-liquid separation efficiency, the liquid receiver c connected to the header pipe g1 is the header pipe g1, that is, the condenser b. It will protrude outward. Therefore, for example, in a narrow space where there is an obstacle such as a car body, there is a problem that the liquid receiver c cannot be installed by interfering with the obstacle.
[0006]
The present invention has been made in view of the above circumstances, and provides a heat exchange device that avoids obstacles and enables a receiver to be connected to a condenser so that the installation space can be effectively used.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention according to claim 1 is a gas generator comprising a pair of header pipes, a condenser having a plurality of heat exchange pipes connected to the header pipes, and a heat medium liquefied by the condenser. In the heat exchange device comprising a liquid receiver for performing liquid separation, the liquid receiver has a stay for connecting to the header pipe by brazing, and the stay is in a radial extension direction of the header pipe. A first arm portion that extends, a second arm portion that intersects with the first arm portion and extends in the radial extension direction of the liquid receiver, and the first arm portion and the second arm A through hole communicating with the outflow hole and the inflow hole of the heat medium provided in the header pipe is provided in the part. In this case, the through hole includes a first through hole that penetrates the first arm portion and a second through hole that penetrates the second arm portion, and the first and second through holes. The opening is closed with a plug (claim 2 ).
[0008]
With this configuration, even when there are obstacles on the front, rear, left and right of the condenser, the condenser and the liquid receiver can be installed in a state where the obstacle is avoided.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Here, a heat exchange device that is used in an air conditioner such as an automobile and that has a parallel flow type condenser and a liquid receiver integrally brazed and joined will be described.
[0010]
Reference Embodiment FIG. 1 is a front view showing a reference embodiment of a heat exchange device according to the present invention, FIG. 2 is a schematic plan view of FIG. 1, and FIG. 3 is a longitudinal sectional view showing an enlarged main part of FIG. It is.
[0011]
The condenser 1 constituting the heat exchange device includes a pair of header pipes (heat medium flow pipes) 2a and 2b, a plurality of heat exchange pipes 3 installed between the header pipes 2a and 2b, and each heat exchange pipe 3. And heat exchange fins such as corrugated fins 4 that are joined together.
[0012]
The header pipes 2a and 2b are formed in a substantially cylindrical shape with, for example, an extruded shape member made of aluminum, and a cap member 5 is fixedly attached to the upper and lower end portions thereof. In addition, a heat medium inlet 7 is provided, for example, near the outer upper end of one header pipe 2a (left side in FIG. 1), and the outer lower end of the other header pipe 2b (right side in FIG. 1). A heat medium outlet 8 is provided in the vicinity. Further, in order to communicate with the receiver 10, a heat medium outflow hole 9 a and an inflow hole 9 b are formed on the side surface of the header pipe 2 a (see FIG. 3), and the outflow hole 9 a and the inflow hole 9 b are formed. The liquid receiver 10 is integrally brazed and joined via stays 16 and 17 described later so as to communicate with each other. A partition plate 90 is interposed between the outflow hole 9a and the inflow hole 9b in the header pipe 2a.
[0013]
The heat exchange tube 3 is formed of, for example, a flat plate shape made of an aluminum extruded shape, and has a plurality of heat medium flow paths (not shown) penetrating in the longitudinal direction. ) Is formed. Both end portions of the heat exchange pipe 3 formed in this way are inserted and fixed in a plurality of slits (not shown) arranged in parallel with each other on the opposite sides of the header pipes 2a and 2b. Has been.
[0014]
The heat exchange fins, that is, the corrugated fins 4 are formed in a continuous wave shape by bending an aluminum plate, and are brazed between the heat exchange tubes 3. In this case, the corrugated fins 4 are also brazed and joined to the outer sides of the heat exchange tubes 3 arranged at the uppermost and lowermost stages, and both the corrugated fins 4 are protected in order to protect the corrugated fins 4. Further, the side plate 6 is brazed and joined to the outer side.
[0015]
As shown in FIG. 3, the liquid receiver 10 closes the liquid receiver body 11, the filter 30 accommodated in the liquid receiver body 11, and one end (upper end opening) of the liquid receiver body 11. A cap member (blind plug) 15 and a plug body (blind plug) 20 that is inserted into the other end opening (lower end opening) of the receiver body 11 are mainly configured.
[0016]
The liquid receiver body 11 is formed in an approximately cylindrical shape (excluding portions 16 and 17 to be described later in a cylindrical shape), for example, by an aluminum extruded shape, and the liquid receiver body 11 has a plug body 20 side. A mounting hole 14 is provided at an opposing position near the opening. On the side surface of the receiver body 11, stays 16 and 17 joined to the side surface (outer peripheral surface) of the header pipe 2 a in the condenser 1 are integrally formed with the receiver body 11. The stays 16 and 17 are formed with brazing surfaces (mounting surfaces) 16a and 17a each having an arcuate curved surface that coincides with the side surface of the header pipe 2a. And these stays 16 and 17 are extrusion-molded integrally with the liquid receiver body 11, and then leave a part thereof, that is, the upper and lower end portions, and cut (cut) the other portions into a cylindrical shape. It is formed by.
[0017]
Further, the lower stay 17 is formed with a concave groove 17b on the brazing surface 17a for fitting with the head of the partition plate 90 protruding from the outer peripheral surface of the header pipe 2a. Further, the lower stay 17 is provided with an inlet (through hole) 12 and an outlet (through hole) 13 for the heat medium at one and the other positions (upper and lower positions) of the groove 17b. The through holes 12 and 13 are provided at positions eccentric from the center O of the liquid receiver 10 (specifically, the liquid receiver body 11) (see FIGS. 2, 4A, and 4B). . The stays 16 and 17 communicate with the inlet 12 of the receiver body 11 and the outlet hole 9a of the header pipe 2a, and communicate with the outlet 13 of the receiver body 11 and the inlet hole 9b of the header pipe 2a. In this state, the header pipe 2a is brazed and joined. The stays 16 and 17 and the header pipe 2a are brazed by heating with a brazing material interposed therebetween.
[0018]
The brazing surfaces 16a and 17a of the stays 16 and 17 may be clad with a brazing material. The stays 16 and 17 are not necessarily formed at two places. For example, one stay connected in the vertical direction may be formed, or may be formed at three or more places.
[0019]
As described above, by providing the through holes 12 and 13 at a position eccentric from the center O of the liquid receiver 10, that is, the liquid receiver body 11, as shown in FIG. It is possible to connect (braze) the liquid receiver 10 to the header pipe 2a while avoiding the obstacles A and B existing outside in the front-rear direction. Therefore, even when there are obstacles A and B outside the condenser 1 or when the installation width is narrow, the condenser 1 and the liquid receiver 10 can be installed in a connected state.
[0020]
The filter 30 is mainly composed of, for example, a cylindrical body 31 made of, for example, aluminum and formed into a substantially cylindrical shape with a bottom, and a filter element (not shown) filled in the cylindrical body 31. In this case, a ventilation portion 32 formed of, for example, a metal mesh is provided on the side surface of the cylindrical body 31 (see FIG. 3). Further, as shown by an imaginary line in FIG. 3, for example, a desiccant 35 formed in a substantially columnar shape is inserted in the upper part of the filter 30 in the liquid receiver main body 11 and contained in the heat medium. Moisture can be absorbed and removed.
[0021]
The cap member 15 is formed in, for example, an aluminum member in a substantially hat shape, and a part of the cap member 15 is fitted into an opening at one end (upper side in FIG. 3) of the liquid receiver body 11 to close the opening. It is attached and fixed (brazed) as much as possible. In this case, since it is only necessary to close the opening at one end of the liquid receiver body 11, means other than the cap member 15 may be used, for example, an upper part is integrally provided to close one end of the liquid receiver body 11. . However, when the cap member 15 is used, since the inner surface of the liquid receiver body 11 is formed in a cylindrical shape, a part of the cap member 15 can be easily and reliably attached to one end opening of the liquid receiver body 11. And can be fixed by brazing.
[0022]
The plug body 20 is formed in a substantially cylindrical shape by an extruded shape member made of aluminum, for example, and is detachably inserted into the opening of the liquid receiver body 11. For example, two recesses 24 are provided around the side surface of the plug body 20, and seal members such as O-rings 25 are fitted into the recess grooves 24, respectively. The gap with the body 20 is kept airtight. The concave grooves 24 do not necessarily have to be two places, and may be one place or three places.
[0023]
Further, a screw hole 21 connected to the mounting hole 14 of the receiver body 11 is provided in the vicinity of the end portion (lower end in FIG. 3) of the plug body 20, and a fixing member such as a fixing screw 26 penetrating the mounting hole 14 is provided. The screw hole 21 is screwed. In this case, the stopper 20 does not necessarily need to be screwed. For example, a through hole is provided instead of the screw hole 21, and the through hole is provided at a position where the liquid receiver body 11 faces. The protruding portion of the fixing pin that passes through the mounting hole 14 may be fixed by a stopper, for example, an E ring, or a fixing bolt and a nut may be used instead of the fixing pin and the E ring. Good. That is, the fixing bolt may be passed through the through hole and the mounting hole 14, and the nut may be fastened, that is, screwed to the protruding portion of the fixing bolt.
[0024]
According to the liquid receiver 10 configured as described above, as shown by an alternate long and short dash line with an arrow in FIG. 3, the inlet (through hole) of the liquid receiver main body 11 from the outlet hole 9 a of the header pipe 2 a in the condenser 1. ) When the heat medium flows in through 12, and this heat medium permeates and passes through the desiccant 35 and the filter 30, impurities and moisture contained in the heat medium can be removed. Of the heat medium purified in this way, the liquefied part passes through the inflow hole 9b of the header pipe 2a from the outlet (through hole) 13 and flows into the header pipe 2a, and the gas part receives. It remains in the upper part of the liquid vessel 10. In this case, as shown in FIG. 4B, the through holes 12 and 13 are provided in the tangential direction of the inner circumference of the receiver body 11, so that the heat medium changes the inner circumference of the receiver body 11. Since it swirls and flows, gas-liquid separation can be promoted.
[0025]
When replacing the filter 30 and the desiccant 35, first, the fixing screw 26 is loosened, and the fixing screw 26 is extracted from the mounting hole 14 of the receiver body 11 and the screw hole 21 of the plug body 20. Thereafter, the filter 30 and the plug 20 are removed, the desiccant 35 is removed, and a new desiccant 35 is attached. In this way, the filter 30 and the plug 20 can be accommodated in the receiver body 11 and the filter 30 can be replaced by screwing the fixing screw 26 penetrating the mounting hole 14 into the screw hole 21. it can. In addition, it is not limited to the case where the entire filter 30 is replaced as described above, and a used filter element (not shown) is taken out from the cylinder 31, and the cylinder 31 is washed and dried, and then filled with a new filter element. Also good.
[0026]
◎ Embodiment Figure 5 is a schematic plan view showing an embodiment of a heat exchange device of the present invention, FIG. 6 is receiver and enlarged sectional view of the stay in the embodiment, FIG. 7 is a closed portion of the through hole in the embodiment FIG. 8 is a schematic plan view showing another example of the embodiment , and FIG. 9 is an enlarged cross-sectional view of a liquid receiver and a stay, which are the main parts of FIG.
[0027]
In the embodiment , the condenser 1 and the liquid receiver 10 are connected to the mounting portion of the liquid receiver 10 corresponding to the case where two obstacles C, D or E, F exist in a crossed state. It is.
[0028]
In this case, the stays 16 and 17 (represented by reference numeral 17 hereinafter) projecting from the liquid receiver 10 include a first arm portion 41 extending in the radial extension direction of the header pipe 2a and the first arm portion. 41 and a second arm portion 42 extending in the radial extension direction of the liquid receiver 10 (specifically, the liquid receiver main body 11), and a circle is formed at the tip of the first arm portion 41. An arc-shaped brazing surface (mounting surface) 43 is formed and brazed and joined to the header pipe 2a in the same manner as in the reference embodiment .
[0029]
In addition, the first arm portion 41 and the second arm portion 42 have an inlet (through hole) 12 and an outlet (through) that communicate with the outflow hole 9a and the inflow hole 9b of the heat medium provided in the header pipe 2a, respectively. Hole) 13 is provided. The through holes 12 and 13 are configured by a first through hole 51 that penetrates the first arm portion 41 and a second through hole 52 that penetrates the second arm portion 42. The openings 51 a and 52 a of the second through holes 51 and 52 are closed by the plug body 60. In this case, the first through-hole 51 is drilled with a drill or the like (not shown) from the tip of the first arm portion 41 toward the header pipe mounting side, and the second through-hole 52 is formed with the second arm The hole 42 is drilled from the tip of the portion 42 toward the receiver body 11 side with a drill or the like (not shown), and the openings 51 a and 52 a of the first and second through holes 51 and 52 are closed with the plug body 60. Thus, the through holes 12 and 13 are formed.
[0030]
In this case, as shown in FIG. 7, the plug body 60 is provided with a concave groove 61 around one side of the side surface, and a sealing member such as an O-ring 62 is fitted in the concave groove 61. The openings 51a and 52a of the first and second through holes 51 and 52 are closed in an air-watertight manner. Two concave grooves 61 may be provided. Further, the plug body 60 does not necessarily have such a structure, and a female screw portion provided on the openings 51a and 52a of the first and second through holes 51 and 52 by carving a male screw portion on the side surface. May be screwed together. Further, the plug body 60 may be brazed to the openings 51a and 52a.
[0031]
In the embodiment , the other parts are the same as those in the above-described reference embodiment , so the same parts are denoted by the same reference numerals and description thereof is omitted.
[0032]
As described above, the stay 17 is crossed with the first arm portion 41 extending in the radial extension direction of the header pipe 2a and the first arm portion 41, and the liquid receiver 10 (specifically, the liquid receiver). The second arm portion 42 extending in the radial extension direction of the main body 11), and the first arm portion 41 and the second arm portion 42 are provided with a heat medium outflow hole 9a provided in the header pipe 2a, inflow By providing through holes (inlet 12 and outlet 13) communicating with the holes 9b, as shown in FIG. 5 or FIG. 8, two obstacles C, D or E, F exist in an intersecting state. Even in this case, the condenser 1 and the liquid receiver 10 can be installed in a connected state.
[0033]
【The invention's effect】
As described above, according to the present invention, since it is configured as described above, the following excellent effects can be obtained.
[0034]
According to the first aspect of the present invention, even when there are obstacles on the front, rear, left and right of the condenser, the condenser and the liquid receiver can be installed in a state where the obstacle is avoided. Therefore, the installation of the heat exchange device can be facilitated and the space can be effectively used.
[Brief description of the drawings]
FIG. 1 is a front view showing a reference embodiment of a heat exchange device according to the present invention.
FIG. 2 is a schematic plan view of FIG.
FIG. 3 is a longitudinal sectional view showing an enlarged main part of FIG. 1;
FIG. 4 is an enlarged cross-sectional view showing another embodiment of the liquid receiver and the stay in the reference embodiment .
FIG. 5 is a schematic plan view showing an embodiment of a heat exchange device according to the present invention.
FIG. 6 is an enlarged cross-sectional view showing a liquid receiver and a stay in the embodiment .
7 is an enlarged cross-sectional view showing a main part of FIG. 6;
FIG. 8 is a schematic plan view showing another form of the embodiment.
FIG. 9 is an enlarged cross-sectional view showing the liquid receiver and the stay in FIG.
FIG. 10 is a flowchart showing a configuration of an air conditioner.
FIG. 11 is a front view showing a conventional heat exchange device.
12 is a schematic plan view of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Condenser 2a Header pipe 9a Outflow port 9b Inlet port 10 Receiver 11 Receiver body 12 Inlet port (through-hole)
13 Outlet (through hole)
17 stay 41 first arm portion 42 second arm portion 51 first through hole 51a opening portion 52 second through hole 52a opening portion 60 plug A to F obstacle

Claims (2)

In a heat exchange device comprising a pair of header pipes, a condenser having a plurality of heat exchange tubes connected to the header pipes, and a liquid receiver for performing gas-liquid separation of the heat medium liquefied by the condenser,
The liquid receiver has a stay for connecting to the header pipe by brazing,
The stay has a first arm portion extending in the radial extension direction of the header pipe, and a second arm portion that intersects with the first arm portion and extends in the radial extension direction of the liquid receiver, A heat exchange device, wherein the first arm portion and the second arm portion are provided with through holes communicating with the outflow holes and the inflow holes of the heat medium provided in the header pipe, respectively. The heat exchange device according to claim 1 ,
The said through-hole is comprised by the 1st through-hole which penetrates a 1st arm part, and the 2nd through-hole which penetrates a 2nd arm part, The opening part of the said 1st and 2nd through-hole Is a heat exchange device characterized by being plugged with a plug.

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