JP5430542B2 - Refrigerant condenser - Google Patents

Description

  The present invention relates to a refrigerant condenser, and more particularly to an easily assembled refrigerant condenser having an improved connection structure between a liquid receiver and a condenser.

  As a condenser used in a refrigeration circuit, a liquid receiver for gas-liquid separation of a refrigerant in which a gas phase and a liquid phase are mixed is known as a liquid receiver integrated refrigerant condenser integrally joined to a side surface of a header. It has been. Such a liquid receiver-integrated refrigerant condenser is generally provided with a refrigerant passage that connects the header to the liquid receiver, and each component is fixed by brazing.

  For example, Patent Document 1 discloses a refrigerant condenser in which a condensing unit and a supercooling unit are integrally formed and provided with a liquid receiver. In the present invention, a pair of communication passages are provided to communicate between the condensing unit and the liquid receiver and between the liquid receiver and the supercooling unit, and each member is formed of an aluminum material and is integrally brazed. Are assembled.

Japanese Patent No. 3925158

  However, in the invention disclosed in Patent Document 1, the right header tank 130 and the liquid receiver 140 are directly communicated with each other via the linear communication path 151, and the fixing of each member when brazing is particularly performed. Not considered. For this reason, when the right header tank 130, the liquid receiver 140, and the communication path 151 are integrally brazed and joined, a holding jig or the like for holding these assembled states is required. In addition, since the communication passages 151 and 152 are linear, the degree of freedom in designing the inflow / outflow circuit is low. For example, the outflow portion from the header tank and the inflow portion to the liquid receiver cannot be provided at different positions.

  Therefore, the problem of the present invention is that the communication member that communicates between the header and the liquid receiver, in particular, the inflow / outflow circuit can be freely configured while suppressing cost increase with a simple structure without increasing the number of parts, An object of the present invention is to provide a refrigerant condenser that is easy to manufacture and assemble.

In order to solve the above problems, a refrigerant condenser according to the present invention communicates with a condensing core that cools gaseous refrigerant flowing into a plurality of cooling tubes and condenses it into liquid refrigerant, and upstream of the condensing core. A condensing unit comprising a condensing core inlet-side header pipe to which the gaseous refrigerant is supplied, a condensing core outlet-side header pipe communicating with the downstream side of the condensing core and collecting the liquid refrigerant flowing out of the condensing core; A liquid receiving part through which the liquid refrigerant flows from an inlet through an inflow pipe, and a supercooling part to which the liquid refrigerant is supplied from the liquid receiving part through an outflow pipe,
The supercooling core further cools the liquid refrigerant flowing into the plurality of subcooling tubes, and the supercooling is connected to the upstream side of the supercooling core and the liquid refrigerant is supplied from the liquid receiver. A core inlet-side header pipe, and a supercooling core outlet-side header pipe that communicates with the downstream side of the supercooling core and collects liquid refrigerant flowing out of the supercooling core,
The inflow pipe is integrally formed from one end on the upstream side opened in the header pipe on the outlet side of the condensation core to the other end on the downstream side opened in the liquid receiving section, and the inflow pipe has at least a U-shaped pipe section. The U-shaped pipe portion of the inflow pipe has a downstream portion inserted substantially perpendicular to the liquid receiving portion and an upstream portion inserted substantially perpendicular to the condensation core outlet side header tube,
The outflow pipe is integrally formed from one end on the upstream side opened in the liquid receiving part to the other end on the downstream side opened in the header pipe on the supercooling core inlet side, and the outflow pipe has at least a U-shaped pipe part. The U-shaped pipe part of the outflow pipe has an upstream part inserted substantially perpendicularly to the liquid receiving part and a downstream part inserted substantially perpendicularly to the supercooling core inlet side header pipe. And
The condensation core outlet side header pipe and the supercooling core inlet side header pipe are integrally formed, and the liquid receiving portion is arranged adjacent to the condensation core outlet side header pipe and the supercooling core inlet side header pipe As a result, a pair of side surfaces including a side portion of the liquid receiving portion, a side portion of the condensing core outlet side header pipe, and a side portion of the subcooling core inlet side header pipe are formed, and a U side of the inflow pipe is formed. The shaped pipe part and the U-shaped pipe part of the outflow pipe are provided so as to project substantially vertically on one of the pair of side face parts .

  In the refrigerant condenser according to the present invention, the inflow pipe is integrally formed from one end on the upstream side opened in the header pipe on the outlet side of the condensing core to the other end on the downstream side opened in the liquid receiver, and the outflow pipe is formed Since it is integrally formed from one end on the upstream side opened in the liquid receiving section to the other end on the downstream side opened in the header pipe on the inlet side of the supercooling core, the inflow / outlet passage and the inlet / outlet pipe in the liquid receiver are integrated. A smooth flow of the refrigerant can be realized with the simple structure. Further, since the liquid refrigerant is further cooled by the supercooling unit, the coefficient of performance of the refrigerant circuit can be improved.

  In such a refrigerant condenser according to the present invention, the downstream part of the inflow pipe is inserted into the liquid receiving part, and the upstream part is inserted into the condensation core outlet side header pipe in the insertion direction of the downstream part. It is preferable that it is inserted in parallel to. By adopting such a structure, the inflow pipe is supported by two parallel insertion portions and can be assembled with a simple holding member even in a temporary assembly before brazing. Simplification can be realized.

  Further, the inflow pipe is integrally formed so as to serve as a refrigerant introduction pipe and a refrigerant inflow passage of the liquid receiver, and the outflow pipe is formed as one body so as to serve as a refrigerant outflow path of the liquid receiver and the refrigerant outlet pipe. As a result, further simplification of assembly work can be realized.

  In the refrigerant condenser according to the present invention, it is preferable that a distal end portion of the downstream portion of the inflow pipe is arranged upward along an inner wall surface in the liquid receiving portion. As a result, the liquid refrigerant can stably flow into the liquid receiving part along the inner wall surface in the liquid receiving part, and the liquid level of the liquid refrigerant stored in the liquid receiving part can be minimized. Therefore, mixing of the gas into the liquid refrigerant is prevented, and the performance deterioration of the refrigerant condenser can be prevented.

  The inflow pipe may have a structure including a straight pipe portion and a U-shaped pipe portion extending in a direction perpendicular to the axis of the straight pipe portion. Such a simple shape can be easily manufactured by bending a normal pipe into a desired shape, and a reduction in manufacturing cost can be realized.

  It is preferable that the outlet of the inflow pipe is provided above the inlet of the inflow pipe. According to such a structure, out of the liquid refrigerant introduced into the inflow pipe, only the liquid refrigerant overflowing from the outlet of the inflow pipe flows into the liquid receiving section, and the liquid stored in the liquid receiving section. Since the disturbance of the liquid level of the refrigerant can be minimized, it is possible to prevent the refrigerant condenser from degrading.

  It is preferable that an upstream portion of the outflow pipe is inserted into the liquid receiving portion, and a downstream portion is inserted into the subcooling core inlet side header pipe in parallel to the insertion direction of the upstream portion. With such a structure, since the outflow pipe is supported by two parallel insertion portions, the assembling work and the brazing work can be simplified.

  In the refrigerant condenser according to the present invention, it is preferable that a tip portion of the upstream portion of the outflow pipe is disposed downward along an inner wall surface in the liquid receiving portion. Thereby, since the liquid refrigerant stably flows into the liquid receiving part along the inner wall surface in the liquid receiving part, the disturbance of the liquid surface of the liquid refrigerant stored in the liquid receiving part is minimized, The performance degradation of the refrigerant condenser can be prevented.

  The outflow pipe may have a structure including a straight pipe part and a U-shaped pipe part extending in a direction perpendicular to the axis of the straight pipe part. Such a simple shape can be easily manufactured by bending a normal pipe into a desired shape, and a reduction in manufacturing cost can be realized.

  It is preferable that an inlet of the outflow pipe is provided in the vicinity of a lower bottom portion of the liquid receiving portion. By arranging the inlet of the outflow pipe below the liquid level of the liquid refrigerant stored in the liquid receiving part, the gas refrigerant is prevented from being mixed into the liquid refrigerant flowing into the supercooling part. Performance degradation can be prevented.

  Thus, according to the refrigerant condenser according to the present invention, the inflow pipe is integrally formed from one end on the upstream side opened in the header pipe on the condensing core outlet side to the other end on the downstream side opened in the liquid receiver. In addition, since the outflow pipe is integrally formed from one end on the upstream side opened in the liquid receiving part to the other end on the downstream side opened in the header pipe on the supercooling core inlet side, the refrigerant can be smoothly flowed with a simple structure. It is possible to realize the flow.

It is a perspective view of the refrigerant condenser concerning one embodiment of the present invention. It is the elements on larger scale in the inflow pipe vicinity of the refrigerant | coolant condenser shown in FIG. FIG. 2 is a partial cross-sectional view of the refrigerant condenser shown in FIG. 1, (A) is a partial cross-sectional view of the vicinity of the inflow pipe as viewed from above, and (B) is a partial cross-sectional view of the vicinity of the outflow pipe as viewed from below. It is. It is the partial cross-sectional view of the refrigerant condenser which concerns on other embodiment of this invention, (A) is the partial cross-sectional view which looked at the inflow pipe vicinity from the upper side, (B) looked at the outflow pipe vicinity from the lower side. It is a partial cross-sectional view.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
1, 2 and 3 show a refrigerant condenser according to a first embodiment of the present invention. In FIG. 1, the refrigerant condenser 1 is connected to a condensation core 4 that cools a gaseous refrigerant flowing into a plurality of cooling tubes 6 and condenses it into a liquid refrigerant, and is connected to the upstream side of the condensation core 4 to be supplied with gaseous refrigerant. A condensing part 2 comprising a condensing core inlet side header pipe 3 and a condensing core outlet side header pipe 5 connected to the downstream side of the condensing core and collecting liquid refrigerant flowing out of the condensing core. The outlet side header pipe 5 is communicated with the liquid receiving part 7 fixed to the condensation core outlet side header pipe 5 by a fixing member (not shown) via the inflow pipe 8. A subcooling unit 10 to which liquid refrigerant is supplied from the liquid receiving unit 7 through the outflow pipe 9 is provided at the lower part of the refrigerant condenser 1, and the subcooling unit 10 flows into the plurality of subcooling tubes 14. A supercooling core 12 that further cools the liquid refrigerant, a supercooling core inlet-side header pipe 11 that communicates with the upstream side of the supercooling core 12 and is supplied with the liquid refrigerant from the liquid receiver 7, and a downstream side of the supercooling core 12 And a supercooling core outlet side header pipe 13 for collecting the liquid refrigerant flowing out from the supercooling core 12. In this embodiment, the partition 15 is partitioned between the condensation core outlet side header pipe 5 and the supercooled core inlet side header pipe 11. In addition, in order to divide the refrigerant flow path inside the condensation core inlet side header pipe 3, the condensation core outlet side header pipe 5, the supercooling core inlet side header pipe 11, and the supercooling core outlet side header pipe 13, One or more partitions (not shown) different from the partition 15 may be provided. Further, a filter member (not shown) for removing foreign substances in the refrigerant and a drying member (not shown) for removing moisture in the refrigerant may be provided in the liquid receiving unit 7.

  In FIG. 1, a refrigerant inlet passage block 16 is provided in the condensing core inlet side header pipe 3, and a refrigerant outlet passage block 17 is provided in the subcooling core outlet side header pipe 13. The gaseous refrigerant introduced from the refrigerant inlet passage block 16 to the refrigerant condenser 1 is cooled by heat exchange with air in the plurality of cooling tubes 6, and then received from the condenser core outlet header pipe 5 through the inlet pipe 8. It is introduced into the part 7 and is separated into gas and liquid in the liquid receiving part 7. The liquid refrigerant separated in the liquid receiving part 7 is temporarily stored in the liquid receiving part 7 and then introduced into the supercooling core inlet side header pipe 11 through the outflow pipe 9, via the plurality of supercooling tubes 14. It is further cooled by heat exchange with air and is led out of the refrigerant condenser 1 from the outlet passage block 17.

  Note that the refrigerant condenser 1 in FIG. 1 has a substantially flat plate shape, and can be left standing in a state where one surface side (the back surface side in FIG. 1) is in contact with the floor surface. Further, the externally exposed portion 24 of the inflow pipe existing between the upstream portion 23 of the inflow pipe and the downstream portion 25 of the inflow pipe, and the space between the upstream portion 33 of the outflow pipe and the downstream portion 35 of the outflow pipe. The externally exposed portion 34 of the outflow pipe existing in is disposed on the other surface side (front side in FIG. 1) of the refrigerant condenser 1 having a substantially flat plate shape. According to such a structure, when the inflow pipe 8 and the outflow pipe 9 are assembled to the refrigerant condenser 1 and the liquid receiver 7 fixed thereto, the inflow pipe 8 and the outflow pipe 9 are received from the refrigerant condenser 1 and the liquid receiver. The refrigerant condenser 1 can be allowed to stand in a state of being inserted into the vessel 7, and the inflow pipe 8 and the outflow pipe 9 can be brazed to desired positions without using a special holding member. Work and brazing work are facilitated.

  FIG. 2 shows a partially enlarged view of the refrigerant condenser 1 in FIG. 1 in the vicinity of the inflow pipe 8. 3A shows a partial cross-sectional view of the vicinity of the inlet pipe 8 of the refrigerant condenser 1 as viewed from above, and FIG. 3B shows the vicinity of the outlet pipe 9 of the refrigerant condenser 1 below. The partial cross-sectional view seen from the side is shown. In FIG. 2 and FIG. 3A, the inflow pipe 8 has a structure including a straight pipe portion 20 and a U-shaped pipe portion 21 extending in a direction perpendicular to the axis of the straight pipe portion 20. The downstream portion 25 is inserted into the liquid receiving portion, and the upstream portion 23 of the inflow pipe 8 is inserted into the condensation core outlet side header pipe 5 in parallel with the insertion direction of the downstream portion 25. Further, since the outlet 26 of the inflow pipe is provided above the inlet 22 of the inflow pipe, even when the refrigerant flows out of the inflow pipe 8 in the gas-liquid mixed state and flows into the liquid receiving section 7, it is received. Disturbances in the liquid level of the liquid refrigerant stored in the liquid part 7 can be minimized. Inflow pipe 8 in this embodiment is manufactured by bending a pipe into a predetermined shape, and a reduction in manufacturing cost is realized. Further, the insertion portion of the inflow pipe 8 can be fixed by simply joining the pipe and the curved surface, and no special temporary fixing tool is required, so that the temporary assembly work is facilitated and the brazing reliability is improved. The

  In FIG. 2 and FIG. 3B, the outflow pipe 9 has a structure including a straight pipe portion 30 and a U-shaped pipe portion 31 extending in a direction perpendicular to the axis of the straight pipe portion 30, similarly to the inflow pipe 8. Yes, the upstream portion 33 of the outflow pipe 9 is inserted into the liquid receiving portion 7 and the downstream portion 35 is inserted into the subcooling core inlet header pipe 11 in parallel with the insertion direction of the upstream portion 33. Yes. Further, the inlet 32 of the outflow pipe 9 is provided in the vicinity of the lower bottom portion of the liquid receiving unit 7, and gas mixing into the liquid refrigerant flowing into the supercooling unit 10 is prevented. The outflow pipe 9 is manufactured by bending the pipe into a predetermined shape, and, like the inflow pipe 8, reduction in manufacturing cost, ease of temporary assembly work, and improvement of brazing reliability are realized. In addition, it is preferable that the inlet 32 of the outflow pipe 9 has a suction structure (not shown) so that the liquid refrigerant stored in the lower portion of the liquid receiving unit 7 flows out preferentially.

  FIG. 4 shows a partial cross-sectional view of the refrigerant condenser according to the second embodiment of the present invention. 4A shows a partial cross-sectional view of the vicinity of the inflow pipe 8 of the refrigerant condenser according to the second embodiment of the present invention as viewed from above, and FIG. 4B shows the outflow pipe 9. The partial cross-sectional view which looked at the vicinity from the lower side is shown. In the second embodiment of the present invention, the distal end portion 27 of the downstream portion 25 of the inflow pipe 8 is disposed upward along the inner wall surface in the liquid receiving portion 7, and the upstream portion 33 of the outflow pipe 9. The tip portion 37 is disposed downward along the inner wall surface in the liquid receiving portion 7, and the other portions have the same configuration as that of the first embodiment of the present invention. As described above, the distal end portion 27 of the downstream portion of the inflow pipe and the distal end portion 37 of the upstream portion of the outflow pipe are arranged along the inner wall surface in the liquid receiving portion 7, so that they are stored on the bottom surface of the liquid receiving portion 7. The disturbance of the liquid level of the liquid refrigerant to be performed can be minimized, and the performance degradation of the refrigerant condenser can be prevented. In this embodiment as well, the inlet 32 of the outflow pipe 9 preferably has a suction structure (not shown) so that liquid refrigerant stored in the lower part of the liquid receiving section 7 flows out preferentially. .

  The application of the refrigerant condenser according to the present invention is not particularly limited, but is suitable for use in a vehicle air conditioner that is highly demanded of cost reduction, easy manufacturing, and simplified process.

DESCRIPTION OF SYMBOLS 1 Refrigerant condenser 2 Condensing part 3 Condensing core inlet side header pipe 4 Condensing core 5 Condensing core outlet side header pipe 6 Cooling tube 7 Liquid receiving part 8 Inflow pipe 9 Outflow pipe 10 Supercooling part 11 Supercooling core inlet side header pipe 12 Supercooling core 13 Supercooling core outlet side header pipe 14 Supercooling tube 15 Partition 16 Inlet passage block 17 Outlet passage block 20 Straight pipe portion 21 of inflow pipe U-shaped pipe portion 22 of inflow pipe Inlet 23 of inflow pipe Upstream of inflow pipe Side portion 24 Externally exposed portion 25 of the inflow tube Downstream portion 26 of the inflow tube Outlet 27 of the inflow tube The distal end portion 30 of the downstream portion of the inflow tube The straight pipe portion 31 of the outflow tube The U-shaped tube portion 32 of the outflow tube Inlet 33 Upstream portion 34 of outflow pipe Externally exposed portion 35 of outflow pipe Downstream portion 36 of outflow pipe Outlet 37 of outflow pipe Tip of upstream portion of outflow pipe

Claims (9)

A condensing core that cools the gaseous refrigerant flowing into the plurality of cooling tubes and condenses it into a liquid refrigerant, a condensing core inlet-side header pipe that communicates with the upstream side of the condensing core and is supplied with the gaseous refrigerant, and the condensation A condensing part comprising a condensing core outlet side header pipe that communicates with the downstream side of the core and collects the liquid refrigerant flowing out of the condensing core; a liquid receiving part through which the liquid refrigerant flows from the condensing part through an inflow pipe; A supercooling part to which the liquid refrigerant is supplied from the liquid receiving part through an outflow pipe,
The supercooling core further cools the liquid refrigerant flowing into the plurality of subcooling tubes, and the supercooling is connected to the upstream side of the supercooling core and the liquid refrigerant is supplied from the liquid receiver. A core inlet-side header pipe, and a supercooling core outlet-side header pipe that communicates with the downstream side of the supercooling core and collects liquid refrigerant flowing out of the supercooling core,
The inflow pipe is integrally formed from one end on the upstream side opened in the header pipe on the outlet side of the condensation core to the other end on the downstream side opened in the liquid receiving section, and the inflow pipe has at least a U-shaped pipe section. The U-shaped pipe portion of the inflow pipe has a downstream portion inserted substantially perpendicular to the liquid receiving portion and an upstream portion inserted substantially perpendicular to the condensation core outlet side header tube,
The outflow pipe is integrally formed from one end on the upstream side opened in the liquid receiving part to the other end on the downstream side opened in the header pipe on the supercooling core inlet side, and the outflow pipe has at least a U-shaped pipe part. The U-shaped pipe part of the outflow pipe has an upstream part inserted substantially perpendicularly to the liquid receiving part and a downstream part inserted substantially perpendicularly to the supercooling core inlet side header pipe. And
The condensation core outlet side header pipe and the supercooling core inlet side header pipe are integrally formed, and the liquid receiving portion is arranged adjacent to the condensation core outlet side header pipe and the supercooling core inlet side header pipe As a result, a pair of side surfaces including a side portion of the liquid receiving portion, a side portion of the condensing core outlet side header pipe, and a side portion of the subcooling core inlet side header pipe are formed, and a U side of the inflow pipe is formed. A refrigerant condenser, wherein a shape pipe part and a U-shaped pipe part of the outflow pipe are projected substantially vertically on one of the pair of side face parts .   The downstream part of the inflow pipe is inserted into the liquid receiving part, and the upstream part is inserted in the condensation core outlet side header pipe in parallel with the insertion direction of the downstream part. A refrigerant condenser as described in 1.   The refrigerant condenser according to claim 1 or 2, wherein a tip portion of the downstream portion of the inflow pipe is disposed upward along an inner wall surface in the liquid receiving portion. The refrigerant condenser in any one of Claims 1-3 in which the said inflow pipe consists of a straight pipe part and the said U-shaped pipe part extended in the direction perpendicular | vertical to the axis | shaft of this straight pipe part.   The refrigerant condenser in any one of Claims 1-4 with which the exit of the said inflow tube is provided above the entrance of the said inflow tube.   The upstream portion of the outflow pipe is inserted into the liquid receiving portion, and the downstream portion is inserted into the subcooling core inlet-side header pipe in parallel to the insertion direction of the upstream portion. The refrigerant condenser in any one of -5.   The refrigerant condenser in any one of Claims 1-6 by which the front-end | tip part of the said upstream part of the said outflow tube is arrange | positioned downward along the inner wall face in the said liquid receiving part. The outflow pipe, a straight pipe portion, and a said U-shaped pipe portion extending in the axial direction perpendicular straight tube portion, the refrigerant condenser according to any one of claims 1 to 7.   The refrigerant condenser in any one of Claims 1-8 with which the inlet_port | entrance of the said outflow tube is provided in the lower bottom part vicinity of the said liquid receiving part.

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