JP2008224213A - Evaporator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an evaporator capable of improving heat exchange performance, and capable of thinning. <P>SOLUTION: This evaporator has a core 1 longitudinally juxtaposed with upstream side and downstream side heat exchange tube groups P1 and P2, and upper side and lower side header members 10 and 50 arranged on both upper-lower ends of the core 1. The inside of the upper side header member is longitudinally partitioned, and inlet side and outlet side tanks 11 and 12 are formed. One end of respective tubes 6 in the upstream side tube group P1 is connected to the inlet side tank 11, and the other end is connected to the lower side header member 50. One end of respective tubes 7 in the downstream side tube group P2 is connected to the outlet side tank 12, and the other end is connected to the lower side header member 50. While a refrigerant flowing in the inlet side tank 11 is introduced to the outlet side tank 12 by flowing in the upstream tube group P1, the lower side header member 50 and the downstream tube group P2, a refrigerant flowing in both heat exchange tube groups P1 and P2 is evaporated by exchanging heat with outside air A. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an evaporator for a car air conditioner or a room cooler, a manufacturing method thereof, an evaporator header member, and a refrigeration system, for example.

  A refrigeration system for car air conditioners condenses high-temperature and high-pressure gas refrigerant discharged from a compressor by a condenser, and further uses a decompression means such as an expansion valve to form a gas-liquid mixed phase mist refrigerant, which passes through the evaporator. And evaporate and evaporate, and then return to the compressor.

  Conventionally, as an evaporator employed in the above refrigeration system, a plurality of tube elements in which a pair of dish-shaped forming plates are opposed to each other are laminated in the thickness direction with fins interposed between the tube elements. The formed laminate type is the mainstream.

Such a laminate-type evaporator has a large amount of heat for exchange and a low ventilation resistance, so that excellent characteristics can be obtained.
JP-A-5-296606 Japanese Utility Model Publication No. 4-73790

  On the other hand, in recent years, for example, from the viewpoint of odor problems in the passenger compartment, a deodorizing filter may be attached to the front surface of the evaporator, and in order to secure a filter installation space, the evaporator is made thinner. The tendency to demand is increasing.

  In response to such a demand for thinning, the laminate type evaporator has the following drawbacks.

  First of all, in a laminate type evaporator, a pair of dish-shaped forming plates formed by drawing with a press are made to face each other to form a tube element having a heat exchange path. There are many portions where the plates are in direct contact, that is, portions other than the heat exchange path, and as a result, the passage cross-sectional area of the refrigerant is reduced, passage resistance is increased, and performance may be degraded. As a countermeasure, it is possible to increase the refrigerant plate height by increasing the amount of squeezing of the molding plate and to increase the cross-sectional area of the passage. The ventilation path between tube elements becomes small, and the size of the fin arrange | positioned in a ventilation path becomes small. As a result, the ventilation resistance increases, and the heat transfer area of the fin may decrease, leading to a decrease in performance.

  Secondly, in the laminated evaporator, the fins are not in contact with the part where the pair of molded plates are in direct contact, and this results in a decrease in heat transfer efficiency. The ratio of the non-contact part of a fin increases and there exists a possibility of causing the fall of cooling performance.

  Thirdly, the laminated evaporator has a tank part and a tube part (heat exchange path part) that are integrally formed on a dish-shaped molded plate. It is formed by processing. For this reason, the thickness of the tank portion tends to be thinner than the thickness of the tube portion (heat exchange path portion). Therefore, it is necessary to design the wall thickness based on the tank portion, and although the tube portion has a margin in terms of pressure resistance, the thickness cannot be reduced and the weight reduction may be hindered.

  Thus, in the laminate type evaporator, it is difficult to reduce the thickness further while maintaining sufficient performance.

  The present invention has been made in view of the above circumstances, and an evaporator that can be reduced in size, weight, and thickness while maintaining sufficient heat exchange performance, a manufacturing method thereof, an evaporator header member, and a refrigeration system The purpose is to provide.

  In order to achieve the above object, in the evaporator of the first invention, an upstream heat exchange tube group and a downstream heat exchange tube group in which a plurality of heat exchange tubes are arranged in parallel at predetermined intervals overlap each other in the front-rear direction. Cores arranged side by side, an inlet side tank arranged along one end side of the upstream heat exchange tube group, and an outlet side tank arranged along one end side of the downstream heat exchange tube group And a refrigerant turn member disposed along the other end of both heat exchange tube groups, and one end of each heat exchange tube in the upstream heat exchange tube group is connected to the inlet side tank. The other end is connected to the refrigerant turn member, one end of each heat exchange tube in the downstream heat exchange tube group is connected to the outlet side tank, and the other end is the refrigerant turn member. One of the refrigerants connected in communication and flowing into the inlet side tank flows through the upstream side heat exchange tube group, the refrigerant turn member, and the downstream side heat exchange tube group and is introduced into the outlet side tank. The gist is that the refrigerant flowing through both heat exchange tube groups is configured to evaporate by heat exchange with the outside air.

  In the evaporator according to the present invention, since the refrigerant path is formed in a simple U shape by the upstream and downstream heat exchange tube groups, the flow path resistance of the refrigerant can be reduced. For this reason, the passage sectional area of the refrigerant can be reduced, and the tube height of the heat exchange tube can be reduced. Furthermore, since the tube height can be reduced, the number of tubes installed can be increased without increasing the core size, and the dispersibility of the refrigerant can be improved.

  In the present invention, the inlet side tank is provided with a shunting resistance means for diverting the refrigerant in the tank length direction, or the outlet side tank is used to prevent the drift of the refrigerant. It is preferable to employ a configuration in which a resistance means is provided.

  That is, when these configurations are adopted, the refrigerant passing through the heat exchange tube group is evenly distributed over the entire core, and heat can be efficiently exchanged over the entire core.

  On the other hand, in order to achieve the above object, the evaporator according to the second invention includes an upstream heat exchange tube group and a downstream heat exchange tube group in which a plurality of heat exchange tubes are arranged in parallel at predetermined intervals. Cores arranged side by side so as to overlap with each other, an inlet / outlet header member arranged along one end side of both heat exchange tube groups, and a refrigerant turn side arranged along the other end side of both heat exchange tube groups A header member, and the inside of the inlet / outlet header member is partitioned forward and backward by a partition member, and one side is configured as an inlet side tank and the other side is configured as an outlet side tank, and the upstream heat exchange tube One end of each heat exchange tube in the group is connected to the inlet side tank of the inlet / outlet header, and the other end is connected to the refrigerant turn side header member, so that the downstream side heat exchange tube One end of each heat exchange tube of the tube group is connected to the outlet side tank of the inlet / outlet header, the other end is connected to the refrigerant turn side header member, and the refrigerant flowing into the inlet side tank is While the side heat exchange tube group, the refrigerant turn side header member, and the downstream side heat exchange tube group are introduced into the outlet side tank, the refrigerant flowing through both the heat exchange tube groups exchanges heat with the outside air. The gist of this is that it is configured to be evaporated.

  In the evaporator of the present invention, since the refrigerant path is formed in a simple U shape as described above, the flow path resistance of the refrigerant can be reduced and the dispersibility of the refrigerant can be improved.

  In the present invention, the entrance / exit header member employs a configuration having an entrance / exit header plate through which one end of each heat exchange tube is fixed and an entrance / exit header cover attached so as to cover one surface side of the plate. Is preferred.

  Further, in the present invention, the refrigerant turn side header member includes a refrigerant turn side header plate through which the other end of each heat exchange tube is fixed, and a refrigerant turn side header cover attached so as to cover the other surface side of the plate. It is preferable to adopt a configuration having

  In the present invention, it is desirable to adopt the following configuration in order to improve the dispersibility of the refrigerant.

  That is, in the present invention, it is desirable to adopt a configuration in which a diversion resistance means for diverting the refrigerant in the tank length direction is provided inside the inlet side tank in the inlet / outlet header member.

  Further, as the shunting resistance means, a shunting resistance plate in which the inlet side tank is partitioned vertically and a plurality of refrigerant passage holes are formed at intervals along the tank length direction is adopted. Can do.

  Furthermore, it is preferable to adopt a configuration in which a plurality of refrigerant passage holes in the shunt resistor plate are formed so as to have different hole diameters.

  Further, in the present invention, the inlet / outlet header member has a refrigerant inlet for introducing the refrigerant into the inlet side tank, and the plurality of refrigerant passage holes in the shunt resistor plate move away from the refrigerant inlet. A configuration in which the hole diameter is increased, or the refrigerant inlet is provided at an intermediate position in the longitudinal direction of the inlet side tank, and the tank length among the plurality of refrigerant passage holes in the shunt resistor plate It is more preferable to adopt a configuration in which the diameter of the refrigerant passage hole at the end position is larger than the refrigerant passage hole at the intermediate position in the direction.

  In the present invention, it is also possible to adopt a configuration in which the refrigerant inlet is provided at an end position in the length direction of the inlet side tank so that the refrigerant can be smoothly introduced into the inlet side tank. is there.

  In the present invention, in order to further improve the dispersibility of the refrigerant, it is more preferable to employ the following configuration.

  That is, in the present invention, it is preferable to adopt a configuration in which a drift prevention resistance means for preventing drift of the refrigerant is provided inside the outlet side tank of the inlet / outlet header member.

  As the drift prevention resistance means, one composed of a drift prevention resistance plate in which the outlet side tank is vertically divided and a plurality of refrigerant passage holes are formed at intervals along the tank length direction is adopted. Is good.

  Furthermore, in the present invention, a configuration is adopted in which the interval between the adjacent refrigerant passage holes in the drift prevention resistor plate is set to a range of 1 to 4 times the interval between the adjacent heat exchange tubes. Is desirable.

  That is, when this configuration is adopted, the refrigerant can be evenly distributed throughout the core, and the cooling performance can be further improved.

  Furthermore, in the present invention, a configuration is adopted in which the refrigerant passage hole in the drift prevention resistance plate is arranged on the windward side with respect to the air intake direction of the evaporator rather than the center position in the width direction of the heat exchange tube. Is preferred.

  That is, when this configuration is adopted, the liquid refrigerant can be prevented from flowing out from the inlet / outlet header member, and the expansion valve can be controlled stably.

Further, in the present invention, the inlet / outlet header member has a refrigerant outlet for letting out the refrigerant from the outlet side tank thereof, and is the farthest position from the refrigerant outlet among the refrigerant passage holes in the drift prevention resistance plate. It is more desirable to adopt a configuration in which the cross-sectional area of the holes arranged in is set to 7 mm ² or less.

  That is, when this configuration is adopted, the dispersibility of the refrigerant can be further improved.

  Furthermore, in the present invention, for example, the refrigerant outlet is provided at an intermediate position in the longitudinal direction of the outlet side tank, or the refrigerant outlet is provided in the outlet side tank so that the refrigerant can smoothly flow out. It is possible to employ a configuration provided at the end position in the length direction.

  Moreover, in this invention, the cross-sectional area between the said resistance plate for drift prevention in the said outlet side tank and the edge part of the said heat exchange tube is 1-5 times with respect to the passage cross-sectional area of the said heat exchange tube. It is preferable to adopt a configuration set in the range.

  That is, by adopting this configuration, it is possible to prevent an increase in flow resistance between the drift prevention resistance plate and the tube end, and to secure an appropriate space inside the header member.

  In the present invention, the sum of the cross-sectional areas of the refrigerant passage holes in the resistance plate for drift prevention is set to be larger than the sum of the cross-sectional areas of the heat exchange tubes in the downstream heat exchange tube group. It is desirable to adopt.

  That is, when this configuration is adopted, an increase in passage resistance can be suppressed and the dispersibility of the refrigerant can be further improved.

  Furthermore, in the present invention, in order to reduce passage resistance and improve refrigerant dispersibility, the refrigerant passage hole in the drift prevention resistance plate is formed in a circular shape, or the drift prevention resistance. A configuration in which the shape of the refrigerant passage hole in the plate is set to be an oval or a rectangle having the major axis in the width direction of the heat exchange tube can be suitably employed.

  In the present invention, the heat exchange tubes corresponding to each other between the heat exchange tube groups are integrated with each other, or the heat exchange tube is formed of an extruded tube obtained by extrusion molding. Can be preferably employed.

  Furthermore, in the present invention, it is possible to set the tube height of the heat exchange tube to be small, for example, a configuration in which the tube height of the heat exchange tube is set to 0.75 to 1.5 mm is adopted. Is possible.

  The evaporator of the third invention includes a core in which an upstream heat exchange tube group in which a plurality of heat exchange tubes are arranged in parallel at predetermined intervals and a downstream heat exchange tube group are arranged in the front-rear direction. And an inlet / outlet header member disposed along one end side of both heat exchange tube groups, and a refrigerant turn side header member disposed along the other end side of both heat exchange tube groups. The inside of the member is partitioned into an inlet-side tank and an outlet-side tank by an inlet / outlet-side partition member, and the refrigerant turn-side header member is formed of at least two metal plates that are press-molded. The inside is partitioned into an inflow side tank and an outflow side tank by a refrigerant turn side partition member, and both tanks are communicated by a communication hole provided in the partition member. One end of each heat exchange tube in the side heat exchange tube group is connected to the inlet side tank of the inlet / outlet header, and the other end is connected to the inflow side tank of the refrigerant turn side header member, and the downstream heat exchange tube One end of each heat exchange tube in the group is connected to the outlet side tank of the inlet / outlet header member, the other end is connected to the outlet side tank of the refrigerant turn side header member, and the refrigerant flows into the inlet side tank Are introduced into the outlet side tank through the upstream side heat exchange tube group, the inflow side tank, the communication hole, the outflow side tank, and the downstream side heat exchange tube group. The gist is that the refrigerant flowing through the group is configured to evaporate by heat exchange with the outside air.

  In the third invention, similar to the first and second inventions, since the refrigerant path is formed in a simple U shape, the flow resistance of the refrigerant can be reduced and the dispersibility of the refrigerant is improved. Can be made.

  In addition, since a metal plate press-molded product is used as the entry / exit header member, for example, a header component can be produced continuously from a metal sheet wound in a coil shape, and the production efficiency can be increased. Can be improved.

  Moreover, since the header constituent member is made of a plate material, a brazing sheet in which a brazing material such as a brazing material or a sacrificial material is laminated on at least one surface can be used as this constituent member, so that brazing and corrosion resistance can be used. Can be improved.

  Furthermore, in the present invention, the refrigerant turn side header member has a header plate through which an end of each heat exchange tube is fixed and a header cover attached so as to cover one surface side of the plate, It is preferable to employ a configuration in which the turn side partition member is formed by folding an intermediate region of the metal plate material constituting the header cover along the length direction.

  That is, when this configuration is adopted, the partition member can be integrally formed by press molding, so that productivity can be further improved. Furthermore, since it is comprised by the board part on which the partition member was piled up, sufficient intensity | strength as a partition member can be obtained and the pressure | voltage resistance of a header member can be improved further.

  Furthermore, in the present invention, engagement protrusions are provided at predetermined intervals along the length direction at the tip of the refrigerant turn side partition member, and in the middle of the header plate, corresponding to the engagement protrusions, It is desirable to employ a configuration in which engagement holes are provided at predetermined intervals along the length direction, and the engagement protrusions are fixed by a caulking process in a state of being inserted into the engagement holes. .

  That is, when this configuration is employed, the header cover can be positioned and fixed more accurately with respect to the header plate.

  In the present invention, it is even more preferable that the metal plate material constituting the refrigerant turn side header member is formed of an aluminum brazing sheet in which a brazing material is laminated on at least one side.

  That is, when this configuration is adopted, the brazing property of the entire evaporator can be further improved.

  Furthermore, in the present invention, it is more desirable to employ a configuration in which a brazing material is laminated on the outer surface side of the brazing sheet and zinc is contained in the brazing material layer.

  That is, when this configuration is adopted, the sacrificial layer can be reliably formed on the outer surface of the refrigerant turn-side header member, and the corrosion resistance can be improved.

  Furthermore, in the present invention, it is preferable to adopt a configuration in which the thickness of the header cover is set to be thinner than the thickness of the header plate.

  That is, when this configuration is adopted, the header member can be reduced in size and weight, and the evaporator itself can be reduced in size and weight while ensuring sufficient pressure resistance.

  Moreover, in this 3rd invention, it is preferable to employ | adopt the structure which the said entrance / exit side header member consists of at least 2 or more metal plate material press-molded.

  That is, when this configuration is adopted, the production efficiency and brazing performance of the entry / exit header member can be further improved.

  Moreover, in this 3rd invention, it is good to comprise the entrance / exit header member as follows similarly to the said refrigerant | coolant turn side header member.

  That is, in the third invention, the entrance / exit-side saddle member has a header plate through which the end of each heat exchange tube is fixed, and a header cover attached so as to cover one surface side of the plate, It is preferable to employ a configuration in which the entrance / exit partition member is formed by folding an intermediate region of the metal plate material constituting the header cover along the length direction.

  Furthermore, in the third aspect of the present invention, engagement protrusions are provided at predetermined intervals along the length direction at the distal end of the entrance / exit partition member, and the header plate is provided in the middle corresponding to the engagement protrusions. It is possible to employ a configuration in which engagement holes are provided at predetermined intervals along the length direction, and the engagement protrusions are fixed by caulking processing in a state of being inserted into the engagement holes. good.

  Furthermore, in the third aspect of the invention, it is preferable to adopt a configuration in which the metal plate material constituting the entrance / exit header member is formed of an aluminum brazing sheet in which a brazing material is laminated on at least one side.

  Furthermore, in this 3rd invention, it is good to employ | adopt the structure by which a brazing material is laminated | stacked on the outer surface side of the brazing sheet in the said entrance / exit side header member, and zinc is contained in the brazing material layer.

  Furthermore, in the third invention, it is preferable to adopt a configuration in which the thickness of the header cover in the inlet / outlet header member is set to be thinner than the thickness of the header plate.

  The evaporator according to the fourth aspect of the present invention includes an upstream heat exchange tube group in which a plurality of heat exchange tubes are arranged in parallel at predetermined intervals and a core in which a downstream heat exchange tube group is arranged in the front-rear direction. And an inlet / outlet header member disposed along one end side of both heat exchange tube groups, and a refrigerant turn side header member disposed along the other end side of both heat exchange tube groups. The member includes an entry / exit header plate, an entry / exit header cover attached so as to cover one side of the plate, and a partition member for partitioning the inside of the entry / exit header member into an inlet side tank and an outlet side tank. The refrigerant turn-side header member has a refrigerant turn-side header plate and a refrigerant turn-side header cover attached so as to cover one side of the plate, One of the refrigerant turn-side header plate and the refrigerant turn-side header cover is formed of a press-molded metal plate, and the other is formed of an extruded product, and each heat in the upstream heat exchange tube group One end of the exchange tube is penetrated and fixed to the inlet / outlet header plate and connected to the inlet side tank, and the other end is penetrated and fixed to the refrigerant turn side header plate, and each heat in the downstream heat exchange tube group One end of the exchange tube is penetrated and fixed to the inlet / outlet header plate and connected to the outlet side tank, and the other end is penetrated and fixed to the refrigerant turn side header plate, and the refrigerant flowing into the inlet side tank is , The upstream heat exchange tube group, the refrigerant turn side header member, and the downstream heat exchange While in circulation the tube group is introduced into the outlet-side tank, refrigerant flowing through both the heat exchanging tube groups, and gist made is configured to be vaporized is outside air heat exchanger.

  In the fourth aspect of the invention, similar to the third aspect of the invention, since the refrigerant path is formed in a simple U shape, the flow path resistance of the refrigerant can be reduced and the dispersibility of the refrigerant can be improved. In addition, in the refrigerant turn side header member, productivity, brazing property and corrosion resistance can be improved.

  In the fourth invention, one of the inlet / outlet header plate and the inlet / outlet header cover in the inlet / outlet header member is formed of a press-formed metal plate, and the other is formed of an extruded product. It is preferable to adopt the structure formed.

  That is, when this configuration is adopted, productivity and brazing can be improved also in the entry / exit header member.

  The fifth aspect of the invention specifies one aspect of the manufacturing process of the evaporator of the first aspect of the invention.

  That is, the fifth invention includes a step of preparing a heat exchange tube constituting an upstream heat exchange tube group and a downstream heat exchange tube group arranged side by side in the front-rear direction, and one end side of the upstream heat exchange tube group A step of preparing an inlet-side tank disposed along the downstream side, a step of preparing an outlet-side tank disposed along one end side of the downstream heat-exchange tube group, and the other end side of both heat-exchange tube groups. A step of preparing a refrigerant turn member disposed along the upper end, a brazing step of brazing and fixing one end of each heat exchange tube in the upstream heat exchange tube group to the inlet side tank, and the upstream heat exchange tube A brazing step of brazing and fixing the other end of each heat exchange tube in the group to the refrigerant turn member, and one end of each heat exchange tube in the downstream heat exchange tube group as the outlet A brazing step of brazing and fixing to the tank; and a brazing step of brazing and fixing the other end of each heat exchange tube in the downstream heat exchange tube group to the refrigerant turn member, and is introduced into the inlet side tank. The refrigerant flowing through the upstream heat exchange tube group, the refrigerant turn member, and the downstream heat exchange tube group is introduced into the outlet side tank, while the refrigerant flowing through both the heat exchange tube groups The gist of the invention is to form a refrigerant circuit that is heat-exchanged with the outside air and evaporated.

  In the fifth aspect of the invention, the evaporator of the first aspect of the invention can be reliably manufactured.

  In the fifth aspect of the invention, in order to improve productivity, it is preferable to adopt a method in which the plurality of brazing steps are collectively performed by an in-furnace brazing process.

  The sixth invention specifies one aspect of the manufacturing process of the evaporator of the second invention.

  That is, this 6th invention prepares the heat exchange tube which comprises the upstream heat exchange tube group arrange | positioned along with the front-back direction, and the downstream heat exchange tube group, and follows the one end side of both heat exchange tube groups. A step of preparing an inlet / outlet header member in which one side is configured as an inlet side tank and the other side is configured as an outlet side tank; A step of preparing a refrigerant turn side header member disposed along the other end side of the heat exchanger, and brazing and fixing one end of each heat exchange tube in the upstream heat exchange tube group to the inlet side tank of the inlet / outlet header A brazing step and a brazing step of brazing and fixing the other end of each heat exchange tube in the upstream heat exchange tube group to the refrigerant turn side header member; A brazing step of brazing and fixing one end of each heat exchange tube of the downstream heat exchange tube group to the outlet side tank of the inlet / outlet header, and the other end of each heat exchange tube of the downstream heat exchange tube group A brazing step of brazing and fixing to the refrigerant turn side header member, and the refrigerant flowing into the inlet side tank is converted into the upstream heat exchange tube group, the refrigerant turn side header member, and the downstream heat exchange tube. The gist is that the refrigerant flowing through the group and introduced into the outlet side tank forms a refrigerant circuit in which the refrigerant flowing through both heat exchange tube groups is evaporated by heat exchange with the outside air.

  In the sixth aspect of the invention, the evaporator of the second aspect of the invention can be reliably manufactured.

  In the sixth invention, in order to improve productivity, it is preferable to adopt a method in which the plurality of brazing steps are performed collectively by a brazing process in the furnace.

  The seventh aspect of the invention specifies an aspect of the manufacturing process of the evaporator of the third aspect of the invention.

  That is, the seventh aspect of the invention includes a step of preparing heat exchange tubes constituting the upstream heat exchange tube group and the downstream heat exchange tube group arranged side by side in the front-rear direction, and the inside of the inlet side tank by the entrance / exit partition member And a step of preparing an inlet / outlet header member arranged along one end side of both heat exchange tube groups, and a refrigerant turn side partition comprising at least two press-molded metal plates. The inside of the tank is partitioned into an inflow side tank and an outflow side tank by a member, and both tanks are communicated by a communication hole provided in the partition member, and the refrigerant turn side disposed along the other end side of both heat exchange tube groups Preparing a header member, and brazing one end of each heat exchange tube in the upstream heat exchange tube group to an inlet side tank of the inlet / outlet header A brazing step of fixing, a brazing step of brazing the other end of each heat exchange tube in the upstream heat exchange tube group to an inflow side tank of the refrigerant turn side header member, and the downstream heat exchange tube group A brazing step of brazing and fixing one end of each heat exchange tube to the outlet side tank of the inlet / outlet header member, and the other end of each heat exchange tube in the downstream heat exchange tube group of the refrigerant turn side header member A brazing step of brazing the outflow side tank, and the refrigerant that has flowed into the inlet side tank includes the upstream heat exchange tube group, the inflow side tank, the communication hole, the outflow side tank, and the While flowing through the downstream heat exchange tube group and being introduced into the outlet side tank, the refrigerant flowing through both heat exchange tube groups is exchanged with the outside air. It is summarized as to form a refrigerant circuit to be evaporated.

  In the seventh aspect of the invention, the evaporator of the third aspect of the invention can be reliably manufactured.

  In the seventh aspect of the invention, in order to improve productivity, it is preferable to adopt a method in which the plurality of brazing steps are performed collectively by a brazing process in the furnace.

  The eighth aspect of the invention specifies one aspect of the evaporator manufacturing process of the fourth aspect of the invention.

  That is, the eighth invention includes a step of preparing a heat exchange tube constituting an upstream heat exchange tube group and a downstream heat exchange tube group arranged side by side in the front-rear direction, an entrance / exit header plate, and one surface of the plate An inlet / outlet header cover attached to cover the side, and a partition member for partitioning the inside of the inlet / outlet header member into an inlet side tank and an outlet side tank, along one end side of both heat exchange tube groups An inlet / outlet header member disposed; a refrigerant turn side header plate; and a refrigerant turn side header cover attached so as to cover one surface side of the plate, the refrigerant turn side header plate and the refrigerant turn side header cover One of them is formed by press-molded metal plate, and the other is formed by extrusion molding. A step of preparing a refrigerant turn side header member disposed along the other end side of both heat exchange tube groups, and one end of each heat exchange tube in the upstream side heat exchange tube group is connected to the input / output side header member A brazing step of brazing and fixing to a header plate and connecting to the inlet side tank, and brazing and fixing the other end of each heat exchange tube in the upstream heat exchange tube group to the header plate of the refrigerant turn side header member Brazing step, brazing and fixing one end of each heat exchange tube in the downstream heat exchange tube group to the header plate of the inlet / outlet header member, and connecting to the outlet side tank, The other end of each heat exchange tube in the downstream heat exchange tube group is connected to the header plate of the refrigerant turn side header member. And a brazing step for brazing and fixing, and the refrigerant flowing into the inlet side tank flows through the upstream heat exchange tube group, the refrigerant turn side header member, and the downstream heat exchange tube group. The refrigerant is introduced into the outlet side tank, and the refrigerant flowing through both heat exchange tube groups forms a refrigerant circuit that is evaporated by heat exchange with the outside air.

  In the eighth invention, the evaporator of the fourth invention can be reliably manufactured.

  In the eighth aspect of the present invention, in order to improve productivity, it is preferable to adopt a method in which the plurality of brazing steps are performed collectively by a brazing process in the furnace.

  Further, in the eighth invention, it is preferable to adopt a method in which a flux containing zinc is applied to the surface of the header member and a zinc diffusion layer is formed on the surface before performing the brazing treatment in the furnace. .

  That is, in this case, the sacrificial layer can be reliably formed on the outer surface of the header member, and the corrosion resistance can be improved.

  The ninth invention specifies an entry / exit header member applicable to the third or fourth invention.

  That is, the ninth aspect of the present invention is an evaporation having a core in which an upstream heat exchange tube group in which a plurality of heat exchange tubes are arranged in parallel at predetermined intervals and a downstream heat exchange tube group are arranged in the front-rear direction. A header plate for passing through and fixing the end of each heat exchange tube; a header cover attached to cover one side of the header plate; the header plate and the header A partition member for partitioning a hollow portion surrounded by a cover in the front and the rear to form an inlet side tank and an outlet side tank, and at least one of the header plate and the header cover is press-molded metal The refrigerant that is formed of a plate material and flows into the inlet side tank is the upstream heat exchange tube group. Together are introduced, the refrigerant flowing through the downstream-side heat exchanging tube group, and summarized as made is configured to be introduced into the outlet tank.

  In the ninth invention, both the header plate and the header cover are formed of a press-molded metal plate material, and the partition member has an intermediate region of the metal plate material constituting the header cover in the length direction. The header cover is formed integrally with the header cover, or one of the header plate and the header cover is formed of a press-molded metal plate, and the remaining one It is possible to suitably adopt a configuration in which is formed by an extrusion-molded product.

  The tenth aspect of the invention specifies a refrigerant turn-side header member applicable to the third or fourth aspect of the invention.

  That is, the tenth aspect of the present invention is an evaporation having a core in which an upstream heat exchange tube group and a downstream heat exchange tube group in which a plurality of heat exchange tubes are arranged in parallel at predetermined intervals are arranged side by side in the front-rear direction. A refrigerant turn side header member of a container, a header plate for penetrating and fixing the end of each heat exchange tube, a header cover attached to cover one side of the header plate, the header plate, and the header plate Partitioning a hollow portion surrounded by the header cover back and forth to form an inflow side tank and an outflow side tank, and a partition member having a communication hole for communicating between both tanks, the header plate and the header cover At least one of them is formed of a press-formed metal plate, and the upstream heat exchange tube is formed. The refrigerant flowing through the group is introduced into the inflow side tank and introduced into the outflow side tank through the communication hole, and the refrigerant in the outflow side tank is introduced into the downstream heat exchange tube group. The gist of what is configured as described above.

  In the tenth aspect of the invention, both the header plate and the header cover are formed of a press-molded metal plate material, and the partition member has an intermediate region of the metal plate material constituting the header cover in the length direction. The header cover is formed integrally with the header cover, or one of the header plate and the header cover is formed of a press-molded metal plate, and the remaining one It is possible to suitably adopt a configuration in which is formed by an extrusion-molded product.

  The eleventh invention specifies a refrigeration system using the evaporator of the first invention.

  That is, according to the eleventh aspect of the present invention, the refrigerant compressed by the compressor is condensed by the condenser, the condensed refrigerant is passed through the decompressor to reduce the pressure, and the decompressed refrigerant is evaporated by the evaporator and returned to the compressor. In the refrigeration system, the evaporator has an upstream heat exchange tube group and a downstream heat exchange tube group in which a plurality of heat exchange tubes are arranged in parallel at predetermined intervals, and are arranged in the front-rear direction. A core, an inlet tank disposed along one end of the upstream heat exchange tube group, an outlet tank disposed along one end of the downstream heat exchange tube group, and both heat exchanges A refrigerant turn member disposed along the other end of the tube group, one end of each heat exchange tube in the upstream heat exchange tube group is connected to the inlet side tank, and the other end is the cold One end of each heat exchange tube in the downstream heat exchange tube group is connected to the outlet side tank, and the other end is connected to the refrigerant turn member, and is connected to the turn member. The refrigerant flowing in the refrigerant flows through the upstream heat exchange tube group, the refrigerant turn member, and the downstream heat exchange tube group and is introduced into the outlet tank, while flowing through both the heat exchange tube groups. The gist of the refrigerant is such that the refrigerant is evaporated by heat exchange with the outside air.

  The twelfth invention specifies a refrigeration system using the evaporator of the second invention.

  That is, according to the twelfth aspect of the present invention, the refrigerant compressed by the compressor is condensed by the condenser, the condensed refrigerant is passed through the decompressor to reduce the pressure, and the decompressed refrigerant is evaporated by the evaporator and returned to the compressor. In the refrigeration system, the evaporator has an upstream heat exchange tube group and a downstream heat exchange tube group in which a plurality of heat exchange tubes are arranged in parallel at predetermined intervals, and are arranged in the front-rear direction. A core, a header header member disposed along one end side of both heat exchange tube groups, and a refrigerant turn side header member disposed along the other end side of both heat exchange tube groups, The inside of the inlet / outlet header member is partitioned back and forth by a partition member, one side is configured as an inlet side tank, the other side is configured as an outlet side tank, and the upstream heat exchange tube group One end of each heat exchange tube is connected to the inlet side tank of the inlet / outlet header, the other end is connected to the refrigerant turn side header member, and one end of each heat exchange tube of the downstream side heat exchange tube group is The refrigerant is connected to the outlet side tank of the inlet / outlet header, the other end is connected to the refrigerant turn side header member, and the refrigerant flowing into the inlet side tank is supplied to the upstream heat exchange tube group and the refrigerant turn side. The refrigerant flowing through the header member and the downstream heat exchange tube group is introduced into the outlet side tank, while the refrigerant flowing through both the heat exchange tube groups is configured to evaporate by heat exchange with the outside air. It is the gist.

  The thirteenth invention specifies a refrigeration system using the evaporator of the third invention.

  That is, according to the thirteenth aspect of the invention, the refrigerant compressed by the compressor is condensed by the condenser, the condensed refrigerant is passed through the decompressor to reduce the pressure, and the decompressed refrigerant is evaporated by the evaporator and returned to the compressor. In the refrigeration system, the evaporator has an upstream heat exchange tube group and a downstream heat exchange tube group in which a plurality of heat exchange tubes are arranged in parallel at predetermined intervals, and are arranged in the front-rear direction. A core, a header header member disposed along one end side of both heat exchange tube groups, and a refrigerant turn side header member disposed along the other end side of both heat exchange tube groups, At least two or more metals in which the inside of the inlet / outlet header member is partitioned into an inlet side tank and an outlet side tank by an inlet / outlet side partition member, and the refrigerant turn side header member is press-molded The refrigerant turn side partition member divides the inside into an inflow side tank and an outflow side tank, and both tanks communicate with each other through a communication hole provided in the partition member, and each heat in the upstream heat exchange tube group One end of the exchange tube is connected to the inlet side tank of the inlet / outlet header, and the other end is connected to the inflow side tank of the refrigerant turn side header member, and one end of each heat exchange tube in the downstream heat exchange tube group Is connected to the outlet side tank of the inlet / outlet header member, the other end is connected to the outlet side tank of the refrigerant turn side header member, and the refrigerant flowing into the inlet side tank is transferred to the upstream heat exchange tube. Group, the inflow side tank, the communication hole, the outflow side tank, and the downstream heat exchange tube group, and the outlet side While being introduced into the tank, the refrigerant flowing through the two heat exchanging tube group have been summarized as made is configured to be vaporized is outside air heat exchanger.

  This 14th invention specifies the refrigerating system using the evaporator of the said 4th invention.

  That is, according to the fourteenth aspect of the present invention, the refrigerant compressed by the compressor is condensed by the condenser, the condensed refrigerant is passed through the decompressor to reduce the pressure, and the decompressed refrigerant is evaporated by the evaporator and returned to the compressor. In the refrigeration system, the evaporator has an upstream heat exchange tube group and a downstream heat exchange tube group in which a plurality of heat exchange tubes are arranged in parallel at predetermined intervals, and are arranged in the front-rear direction. A core, a header header member disposed along one end side of both heat exchange tube groups, and a refrigerant turn side header member disposed along the other end side of both heat exchange tube groups, The inlet / outlet header member includes an inlet / outlet header plate, an inlet / outlet header cover attached to cover one side of the plate, and an inlet / outlet tank and an outlet / inlet inside the inlet / outlet header member. A partition member for partitioning into a side tank, wherein the refrigerant turn side header member has a refrigerant turn side header plate and a refrigerant turn side header cover attached so as to cover one surface side of the plate, One of the turn-side header plate and the refrigerant turn-side header cover is formed of a press-formed metal plate, and the other is formed of an extruded product, and each heat exchange in the upstream heat exchange tube group One end of the tube is penetrated and fixed to the inlet / outlet header plate and connected to the inlet side tank, and the other end is fixed to the refrigerant turn side header plate, and each heat exchange in the downstream heat exchange tube group One end of the tube is fixed to the inlet / outlet header plate, and the outlet side tank The other end is penetrated and fixed to the refrigerant turn-side header plate, and the refrigerant flowing into the inlet-side tank is converted into the upstream heat exchange tube group, the refrigerant turn-side header member, and the downstream heat. The gist is that the refrigerant flowing through the exchange tube group is introduced into the outlet side tank, while the refrigerant flowing through both heat exchange tube groups is configured to evaporate by heat exchange with the outside air.

  As described above, according to the evaporators of the first to fourth inventions, since the refrigerant path is formed in a simple U shape, the flow path resistance of the refrigerant can be reduced. For this reason, the passage sectional area of the refrigerant can be reduced, the tube height of the heat exchange tube can be reduced, and a reduction in size, weight and thickness can be achieved. Furthermore, by reducing the tube height, the number of tubes installed can be increased without increasing the core size, so that the dispersibility of the refrigerant can be improved and the heat exchange performance can be improved. . In particular, in the evaporator of the third or fourth invention, since a metal plate press-formed product is used as the header member, productivity can be improved and brazing sheet can be used for brazing. There is an effect that improvement of corrosion resistance and improvement of corrosion resistance can be achieved.

  Since the fifth to eighth inventions specify the manufacturing process of the evaporator of the first to fourth inventions, the evaporator can be manufactured more reliably.

  Since the ninth or tenth invention specifies a header member applicable to the evaporator of the third or fourth invention, the evaporator can be more reliably manufactured.

  Since the eleventh to fourteenth inventions specify the refrigeration system using the evaporator according to the first to fourth inventions, the above effects can be obtained more reliably.

<First Embodiment>
1 to 6 are views showing an evaporator according to a first embodiment of the present invention. As shown in these drawings, this evaporator is used as an evaporator of a refrigeration system for a car air conditioner, and is arranged along the core (1) constituting the heat exchange section and the upper end of the core (1). The basic structure includes an upper header member (10) serving as an entry / exit header member and a lower header member (50) serving as a refrigerant turn side header member disposed along the lower end of the core (1). ing.

  The core (1) includes a plurality of flat tube members (5) and a plurality of corrugated fins (2).

  As shown in FIGS. 7 and 8, the tube member (5) has a flat downstream heat exchange tube (7) disposed on the front row side of the core (1) and a downstream heat exchange tube (7). Aluminum which is integrally provided with a flat upstream heat exchange tube (6) disposed on the rear row side of the core (1) and a connecting piece (8) for connecting these tubes (6) and (7). Or it is comprised with the extruded product of the alloy.

  In each heat exchange tube (6) (7), a plurality of heat exchange paths (6a) (7a) are formed in parallel along the length direction (extrusion direction), and each heat exchange path (6a ) (7a) are integrally formed with inner fins (6b) and (7b) so as to project inwardly.

  The tube members (5) and corrugated fins (2) configured as described above are alternately stacked in the core width direction, and side plates (3) are stacked outside the corrugated fins (2) at both end portions. The core (1) is formed. Thus, the upstream heat exchange tubes (6) as the first path are formed by the upstream heat exchange tubes (6) in the plurality of tube members (5), and the downstream heat exchange tubes are formed. (7) forms the downstream heat exchange tube group (P2) as the second path.

  Here, in this embodiment, the tube height (H) is desirably set to 0.75 to 1.5 mm, and preferably the lower limit value is set to 1.0 mm or more.

  The widths of the heat exchange tubes (6) and (7) are preferably set to 12 to 18 mm, and the width of the tube member (5) integrated with the tubes (6) and (7) is preferably set to 32 to 38 mm. . Furthermore, the wall thickness of the outer peripheral wall in the tubes (6) and (7) is preferably set to 0.175 to 0.275 mm. The wall thickness of the partition walls partitioning the heat exchange paths (6a) and (7a) in the tubes (6) and (7) is preferably set to 0.175 to 0.275 mm. It is good to set to 5-3.0 mm. Furthermore, the curvature radius (outside R) on the outer surface side at both sides of the heat exchange tubes (6) and (7) is preferably set to 0.35 to 0.75 mm.

  The height of the corrugated fin (2) (fin height) is preferably set to 7.0 to 10 mm, and the pitch (fin pitch) of the fin (2) is set to 1.3 to 1.8 mm. Good to do.

  That is, when a configuration within these numerical ranges is employed, good heat exchange performance can be obtained.

  In this embodiment, the heat exchange tubes (6) and (7) are integrally formed with each other. However, the present invention is not limited to this, and in the present invention, both tubes (6) and (7) are formed separately. You may do it. Furthermore, the heat exchange tubes (6) and (7) are not limited to extrusion molded products. For example, a bent product obtained by bending a plate material and having inner fins installed therein, or a plate material is roll-formed, and a heat exchange path. You may make it comprise with the roll molded product made to form.

  Furthermore, in the present invention, a plate fin may be used instead of the corrugated fin (2).

  As shown in FIGS. 1 to 6, the upper header member (10) is disposed at the upper end of the core (1) along the core width direction, and includes a header plate (20) and a header cover ( 30), a shunting resistance plate (41), and a drift prevention resistor plate (42).

  In the header plate (20), a plurality of tube attachment holes (21) are formed at predetermined intervals along the length direction in each of the first half region and the second half region.

  The header cover (30) is disposed so as to cover the upper surface side of the header plate (20) from above, and a partition wall (continuous in the longitudinal direction (core width direction)) extends in the front-rear direction intermediate position on the lower surface side. 31) are integrally formed.

  A tube-shaped outlet side tank (12) extending along the core width direction is formed at a front position of the partition wall (31), surrounded by the header plate (20) and the header cover (30). At the same time, a tube-shaped inlet side tank (11) extending along the core width direction is formed at the rear position of the partition wall (31).

  Further, the header cover (30) is formed with a refrigerant inlet (11a) at a position corresponding to the inlet side tank (11) at an intermediate position in the longitudinal direction, and at a position corresponding to the outlet side tank (12). An outlet (12a) is formed.

  Further, a shunt resistor plate (41) is attached to the inlet side tank (11) in such a manner as to divide the inside of the tank on the top and bottom. A plurality of refrigerant passage holes (41a) are formed in the shunt resistor plate (41) at predetermined intervals along the length direction. In this refrigerant passage hole (41a), the hole diameter of the passage hole (41a) located in the vicinity of the refrigerant inlet (11a), in other words, the hole diameter of the passage hole (41a) located in the middle in the longitudinal direction is formed to be the smallest, The hole diameter is formed so as to gradually increase from the intermediate position toward the end position.

  A drift prevention resistance plate (42) is attached to the outlet side tank (12) in such a manner as to divide the inside of the outlet side tank (12) vertically. A plurality of refrigerant passage holes (42a) having the same hole diameter are formed in the drift prevention resistor plate (42) at predetermined intervals along the length direction.

  As is clear from FIG. 3, the number of refrigerant passage holes (41a) in the shunt resistor plate (41) is smaller than the number of heat exchange tubes (6) in the upstream heat exchange tube group (P1). It has become. Further, as is clear from the figure, the number of refrigerant passage holes (42a) in the drift prevention resistor plate (42) is less than the number of heat exchange tubes (7) in the downstream heat exchange tube group (P2). It has become.

  Moreover, as shown in FIG. 1, the header cap (15) is attached to the both-sides opening part of the upper side header member (10), and the both-ends opening part is obstruct | occluded airtightly, respectively.

  Further, joint pipes (11b) and (12b) communicating with the inlets and outlets (11a) and (12a) are connected and fixed to the refrigerant inlet (11a) and the refrigerant outlet (12a) of the upper header member (10).

  In this embodiment, the shunting resistance plate (41) and the drift prevention resistor plate (42) are formed separately from the header plate (20) and the header cover (30). In this case, these resistance plates (41) and (42) are integrally formed on the header plate (20) and the header cover (30), or the partition wall (31) is formed integrally on the header plate (20) side. Alternatively, the partition wall (31) may be provided separately.

  The upper end of the upper header member (10) having the above configuration is fixed in a state where the upper ends of the heat exchange tubes (6) and (7) of the core (1) are inserted into the tube mounting holes (21) of the header plate (20). Is done. At this time, the upstream heat exchange tube (6) is connected in communication with the inlet side tank (11), and the downstream heat exchange tube (7) is connected in communication with the outlet side tank (12).

  On the other hand, as shown in FIGS. 4 and 6, the lower header member (50) is disposed along the core width direction at the lower end of the core (1), and includes a header plate (60), And a header cover (70).

  In the header plate (60), a plurality of tube attachment holes (61) are formed at predetermined intervals along the length direction in each of the first half area and the second half area.

  The header cover (70) is disposed so as to cover the lower surface side of the header plate (60) from below, and is a partition wall (continuous in the longitudinal direction (core width direction)) extending in the longitudinal direction on the upper surface side. 71) is formed. Furthermore, a plurality of notch-like communication holes (71a) are formed in the partition wall (71) at predetermined intervals in the length direction.

  Then, a tube-shaped inflow side tank (51) that is surrounded by the header plate (60) and the header cover (70) and extends continuously along the core width direction is formed at the rear position of the partition wall (71). In addition, a tube-shaped outflow side tank (52) extending continuously in the core width direction is formed at the front position of the partition wall (71). In this case, the inflow side tank (51) and the outflow side tank (52) communicate with each other through a notch-shaped communication hole (71a) formed in the partition wall (71).

  Moreover, as shown in FIG. 1, the header cap (55) is attached to the both-sides opening part of the lower header member (50), and both the opening parts are obstruct | occluded airtightly, respectively.

  In the present invention, the partition wall (71) of the lower header member (50) may be integrally formed on the header plate (60) side or provided separately.

  Fixed in a state where the lower ends of the heat exchange tubes (6) and (7) of the core (1) are inserted into the tube mounting holes (61) of the header plate (60) in the lower header member (50) of the above configuration. Is done. At this time, the upstream heat exchange tube (6) is connected to the inflow side tank (51) in the lower header member (50), and the downstream heat exchange tube (7) is connected to the outflow side tank (52). ).

  In the evaporator according to the first embodiment configured as described above, each constituent member thereof is made of aluminum or an alloy thereof, and further, an aluminum brazing sheet or the like in which a brazing material is laminated on at least one side, and these constituent parts. Are temporarily fixed by assembling into a predetermined evaporator shape via a brazing material as required. The temporarily assembled products temporarily fixed in this manner are connected and integrated together by collectively brazing in a furnace.

  But in this invention, the connection method of each structural member is not specifically limited, You may assemble in what kind of procedure.

  The evaporator having the above-described configuration has a front side (downstream heat exchange tube group P2 side) as an air intake side and a back side (upstream heat exchange tube P1 side) as an air outlet side, and includes a compressor, a condenser, Along with the decompression means, it is mounted as a refrigeration cycle of an automobile. The atomized gas-liquid mixed-phase two-phase refrigerant that has passed through the compressor, the condenser, and the decompression means passes through the refrigerant inlet (11a) of the evaporator and enters the inlet side tank (11) of the upper header member (10). ).

  The refrigerant introduced into the inlet side tank (11) is dispersed in the length direction of the tank (11) by the shunt resistor plate (41), and passes through each refrigerant passage hole (41a) of the resistor plate (41). pass. At this time, the refrigerant tends to pass through the refrigerant passage hole (41a) in the vicinity of the refrigerant inlet (11a), that is, the refrigerant passage hole (41a) at the intermediate position in the longitudinal direction at a large ratio due to inertia. In the form, the resistance plate (41) reduces the flow rate of the refrigerant, so that the refrigerant is smoothly dispersed in the length direction and passes through each refrigerant passage hole (41a). Moreover, in the present embodiment, since the hole diameter of the refrigerant passage hole (41a) at the intermediate position in the resistance plate (41) is reduced and the hole diameter is increased toward the end position, each refrigerant passage hole (41a) is formed. ) Is moderately limited, and the refrigerant passes through each refrigerant passage hole (41a) evenly. Therefore, also in this respect, the refrigerant can be efficiently dispersed in the length direction.

  In this way, the refrigerant equally divided by the resistance plate (41) is uniformly distributed and introduced into each tube (6) of the upstream heat exchange tube group (P1).

  The refrigerant introduced into the upstream heat exchange tube group (P1) passes through each tube (6) and is introduced into the inflow side tank (51) of the lower header member (50) and then into the partition wall (71). It passes through the cutout communication hole (71a) and is introduced into the outflow side tank (52).

  Here, since the refrigerant passing through the upstream heat exchange tube group (P1) is evenly dispersed in each heat exchange tube (6), the lower header member is maintained while maintaining its uniform dispersion state well. After passing through the inflow side and outflow side tanks (51) and (52) of (50), they are evenly distributed and introduced into each tube (7) of the downstream heat exchange tube group (P2).

  The refrigerant that has passed through each heat exchange tube (7) on the downstream side is introduced into the outlet side tank (12) of the upper header member (10), and appropriate resistance is given by the resistance plate (42) for preventing drift. Thus, a uniform pressure balance is obtained over the entire length direction of the tank (12), the drift is surely prevented, and the refrigerant passes through each refrigerant passage hole (42a) of the resistance plate (42), and the refrigerant outlet (12a).

  Here, since the drift of the refrigerant is prevented in the outlet side tank (12) by the drift prevention resistance plate (42), the drift of the refrigerant is effectively prevented also in the downstream heat exchange tube group (P2). The refrigerant passes through the downstream heat exchange tubes (7) more reliably and evenly distributed.

  The refrigerant flowing out from the refrigerant outlet (12a) of the upper header member (10) is returned to the compressor in the refrigeration cycle.

  On the other hand, the refrigerant passing through the upstream and downstream heat exchange tube groups (P1) and (P2) exchanges heat with the air (A) taken in from the front side of the core (1), and thus the air (A) Absorbs heat and evaporates. Air (A) cooled by heat absorption flows out from the back side of the core (1) and is sent into the passenger compartment.

  As mentioned above, according to the evaporator of this embodiment, a refrigerant | coolant is disperse | distributed equally to each heat exchange tube (6) (7) of an upstream and downstream heat exchange tube group (P1) (P2). Since it passes, the refrigerant can efficiently exchange heat throughout the tube groups (P1) and (P2), that is, throughout the core (1), and heat exchange performance can be improved.

  Furthermore, in the present embodiment, a simple U-shaped refrigerant path is formed which only allows the refrigerant to pass through the two tube groups (P1) and (P2), so that the flow resistance of the refrigerant can be reduced. it can. For this reason, the passage cross-sectional area of the refrigerant can be reduced, the tube height of each heat exchange tube (6) (7) can be reduced, and further reduction in size and weight and reduction in thickness can be achieved. Moreover, by reducing the tube height, the number of installed heat exchange tubes (6) and (7) can be increased without changing the evaporator size, and the dispersibility of the refrigerant can be further improved. It is possible to further improve the heat exchange performance.

  In the present embodiment, the upper header member (10) is formed with a partition wall (31) disposed between the upper wall and the lower wall continuously along the length direction, and the lower header. Since the partition wall (71) disposed between the upper wall and the lower wall of the member (50) is continuously formed along the length direction, the partition walls (31) and (71) Since the header members (10) and (50) are reinforced, the pressure resistance of both header members (10) and (50) can be improved.

  Furthermore, in this embodiment, the tube member (5) which integrally formed the heat exchange tubes (6) (7) corresponding to each other between the upstream and downstream heat exchange tube groups (P1) (P2) is adopted. Therefore, the upstream and downstream heat exchange tubes (6) and (7) can be assembled simply by arranging the tube members (5) in a stacked manner, and the evaporator assembly operation can be performed easily. Furthermore, the assembly strength can be improved by connecting the heat exchange tubes (6) and (7) between both the tube groups (P1) and (P2).

  Here, in the evaporator according to the present embodiment, the relationship between the tube height (H) of the heat exchange tube and the exchange heat quantity ratio (%) is shown in the graph of FIG. As apparent from the graph, in the evaporator of the present invention, when the tube height (H) is 0.75 to 1.5 mm, the heat exchange rate ratio is high, and a heat exchange tube having the tube height is preferably used. Can be adopted.

  For reference, the tube height of the heat exchange tube used in a general header type heat exchanger is preferably about 1.5 to 3.0 mm, which is suitable for the evaporator of this embodiment. Compared to twice the height.

  In the above-described embodiment, the inlet side tank (11) and the outlet side tank (12) of the upper header member (10) are provided with the shunt resistor plate (41) and the drift prevention resistor plate (42). However, the present invention is not limited to this. For example, as shown in FIGS. 11 and 12, the drift prevention resistor plate (42) is omitted, or as shown in FIGS. 13 and 14, the shunt resistor plate is used. (41) may be omitted, and further, both the shunting resistance plate (41) and the drift prevention resistor plate (42) may be omitted.

  Moreover, in the said embodiment, although the refrigerant | coolant inlet (11a) and the refrigerant | coolant outlet (12a) are formed in the intermediate part upper surface of the upper side header member (10), this invention is not restricted only to that and is shown in FIG. Thus, the refrigerant inlets (11a) and (12a) may be formed at one end of the header member (10), and the refrigerant may be introduced and led out from the header end position.

  Further, in the above embodiment, as shown in FIG. 16, the refrigerant passage hole (42a) of the drift prevention resistor plate (42) is located on the windward side with respect to the air intake direction of the evaporator rather than the center position in the tube width direction. You may make it arrange | position to. Furthermore, the refrigerant passage hole (42a) may be formed in a circular shape, or may be formed in an oval shape or a rectangular shape whose major axis is the width direction of the heat exchange tube.

  Moreover, in the said embodiment, as shown in FIG. 17, the clearance gap (42) between the resistance board (42) and the edge part of a heat exchange tube (7) in the outflow side tank (12) of an upper header member (10) ( The cross-sectional area of S) (indicated by hatching in FIG. 17) is preferably set to 1 to 5 times the passage cross-sectional area of the heat exchange tube (7). That is, when this configuration is adopted, it is possible to prevent an increase in flow resistance between the drift prevention resistance plate (42) and the tube end, and to secure an appropriate space inside the header member.

  Moreover, in the evaporator of the said embodiment, although the downstream heat exchange tube group (P2) side is made into the front, air (A) is taken in from the downstream heat exchange tube group (P2) side, but this invention However, the present invention is not limited to this, and air (A) may be taken in from the upstream heat exchange tube group (P1) side with the upstream heat exchange tube group (P1) side as the front face of the evaporator.

  Furthermore, in this embodiment, the installation direction of the evaporator is not particularly limited, and may be installed in any direction.

Second Embodiment
18 and 19 are views showing an evaporator according to a second embodiment of the present invention. As shown in these drawings, the evaporator according to this embodiment includes a header plate (20) (60) that constitutes an inlet / outlet (upper side) header member (10) and a refrigerant turn side (lower side) header member (50). ) And header covers (30) and (70) are made of press-formed aluminum (including an alloy thereof) plate material.

  That is, as shown in FIGS. 18 to 20, the header plate (20) of the upper header member (10) is formed by subjecting an aluminum plate material to a predetermined drilling process and then a bending process. ing. By this press molding, a plurality of tube mounting holes (21) are formed in the header plate (20) in two rows in the front and rear at predetermined intervals along the length direction. Between (21), a plurality of engagement holes (22) are formed at predetermined intervals along the length direction.

  As shown in FIG. 21, the upper header cover (30) is made of an aluminum plate having a thickness smaller than that of the plate constituting the header plate (20), and the plate is subjected to a predetermined drilling process. It is formed by bending. As a result of this press molding, the header cover (30) is folded into an intermediate region to form a partition wall (31) so as to protrude downward, and at the tip of each partition wall (31), the header Corresponding to the engagement hole (22) of the plate (20), the engagement protrusion (32) is formed in a downward projecting shape.

  In a state where the header cover (30) is disposed so as to cover the upper surface side of the header plate (20) from above, the engagement protrusion (32) at the tip of the partition wall (31) is formed by the header plate (20). It is fixed by being inserted into the engagement hole (22) and crimped. At this time, while being surrounded by the header plate (20) and the header cover (30), a tube-shaped outlet side tank (12) extending along the core width direction is formed at a front position of the partition wall (31). A tube-shaped inlet side tank (11) extending along the core width direction is formed at a rear position of the partition wall (31).

  As shown in FIG. 22, the header plate (60) of the lower header member (60) is formed by punching and bending an aluminum plate material in the same manner as the header plate (10). The By this press molding, a plurality of tube mounting holes (61) are formed in the header plate (60) in two rows in the front and rear at predetermined intervals along the length direction, and two rows of tube mounting holes in the front and rear. (61) A plurality of engagement holes (62) are formed at predetermined intervals along the length direction.

  As shown in FIG. 23, the lower header cover (70) is formed by punching and bending a thin aluminum plate material in the same manner as the header cover (30). As a result of this press molding, the header cover (70) is folded into an intermediate region to form a partition wall (71) so as to protrude downward, and at the tip of each partition wall (71), the header Corresponding to the engagement hole (62) of the plate (60), the engagement protrusion (72) is formed in a downward projecting shape. Further, the partition wall (71) is formed with a communication hole (71a) in a cutout shape at predetermined intervals along the length direction.

  With the header cover (70) arranged so as to cover the upper surface side of the header plate (60) from above, the engagement protrusion (72) at the tip of the partition wall (71) is engaged with the header plate (60). It is fixed by being inserted into the joint hole (62) and crimped. At this time, a tube-shaped inflow side tank (51) that is surrounded by the header plate (60) and the header cover (70) and extends continuously along the core width direction is formed at the rear position of the partition wall (71). In addition, a tube-shaped outflow side tank (52) extending continuously in the core width direction is formed at the front position of the partition wall (71). Further, the inflow side tank (51) and the outflow side tank (52) communicate with each other through a communication hole (71a) formed in the partition wall (71).

  And as shown in FIG.18 and FIG.19, in each tube attachment hole (21) of the header plate (20) in an upper header member (10), the heat exchange tube of the core (1) similar to the said 1st Embodiment ( 6) The upper end of (7) is fixed in the inserted state, and the heat exchange tube (1) of the core (1) is inserted into each tube mounting hole (61) of the header plate (60) in the lower header member (50). 6) The lower end of (7) is fixed in the inserted state.

  Since other configurations are substantially the same as those of the first embodiment, the same or corresponding parts are denoted by the same reference numerals, and redundant description is omitted.

  Also in the evaporator of the second embodiment, as described above, the evaporator constituent members are assembled and temporarily fixed in a predetermined evaporator shape, and the temporarily assembled product is collectively brazed in the furnace. The whole is connected and integrated.

  In the evaporator of the second embodiment, the same effect can be obtained as described above.

  In addition, since aluminum sheet press-formed products are used as the constituent members (20), (30), (60), and (70) of the header members (10) and (50), aluminum wound in a coil shape is used. The header constituent members (20), (30), (60), and (70) can be produced continuously from the original plate, and the production efficiency can be improved.

  Further, since the header constituent members (20), (30), (60), and (70) are made of a plate material, the constituent members (20), (30), (60), and (70) are made of brazing material and sacrificial material at least on one side. Since a brazing sheet in which a clad material such as a material is laminated can be used, brazability can be improved. In particular, when a clad material is laminated on the outer surface side, the anticorrosion property can be improved by adding zinc (Zn) to the clad material and forming it as a sacrificial material layer.

  Further, since the partition walls (31) and (71) of both header members (10) and (50) function as reinforcing walls, sufficient strength is ensured while reducing the header height and reducing the plate thickness. Therefore, it is possible to reduce the size and weight. In particular, since the partition walls (31) and (71) are formed by folding the plate material twice, sufficient strength can be ensured even if the plate thickness is thin, and further reduction in size and weight can be achieved. Can do.

  In the second embodiment, as in the first embodiment, a shunt resistor plate (41) and a drift prevention resistor plate (42) are provided inside the header members (10) and (50). May be.

  In this embodiment, the header plates (20), (60) and the header covers (30), (70) constituting the header members (10), (50) are all formed of an aluminum plate material. In the invention, a part of these may be formed by an extruded product of aluminum.

  In addition, when an extruded product is used as a part of the header component, it is difficult to form a sacrificial layer by itself, so the extruded product is made into a flux containing zinc before brazing. By applying, a zinc diffusion layer (sacrificial layer) can be formed on the outer surface, and corrosion resistance can be improved.

  Also in the second embodiment, as in the first embodiment, the positions where the refrigerant inlet and the refrigerant outlet are formed, the air intake direction, and the evaporator installation direction are not particularly limited.

It is a figure which shows the evaporator which is 1st Embodiment of this invention, Comprising: The figure (a) is a front view, The figure (b) is a side view. It is a perspective view which shows the evaporator of 1st Embodiment. It is a perspective view which decomposes | disassembles and shows the upper part of the evaporator of 1st Embodiment. It is a perspective view which decomposes | disassembles and shows the lower part of the evaporator of 1st Embodiment. It is side surface sectional drawing which expands and shows the upper side header member periphery of the evaporator of 1st Embodiment. It is side surface sectional drawing which expands and shows the lower header member periphery of the evaporator of 1st Embodiment. It is sectional drawing which expands and shows the heat exchange tube applied to the evaporator of 1st Embodiment. It is a perspective view which shows the tube member applied to the evaporator of 1st Embodiment. It is a perspective view which shows the flow of the refrigerant | coolant in the evaporator of 1st Embodiment. It is a graph which shows the relationship between tube height and exchange heat quantity ratio in the evaporator of 1st Embodiment. It is a perspective view which decomposes | disassembles and shows the upper part of the evaporator which is a 1st modification of this invention. It is side surface sectional drawing which expands and shows the upper side header member periphery of the evaporator of a 1st modification. It is a perspective view which decomposes | disassembles and shows the upper part of the evaporator which is a 2nd modification of this invention. It is side surface sectional drawing which expands and shows the upper side header member periphery of the evaporator which is a 2nd modification. It is a figure which shows the evaporator which is a 3rd modification, Comprising: The figure (a) is a front view, The figure (b) is a top view. It is a top view which shows the resistance plate for drift prevention of the evaporator which is a 4th modification. It is side surface sectional drawing which shows the outlet side tank periphery of the upper side header member in the evaporator of the said 1st Embodiment. It is side surface sectional drawing which expands and shows the upper side header member periphery of the evaporator which is 2nd Embodiment of this invention. It is side surface sectional drawing which expands and shows the lower header member periphery of the evaporator which is 2nd Embodiment. It is a figure which shows the header plate in the upper side header member of 2nd Embodiment, Comprising: The figure (a) is side sectional drawing, The figure (b) is a top view. It is a figure which shows the header cover in the upper side header member of 2nd Embodiment, Comprising: The figure (a) is side sectional drawing, The figure (b) is front sectional drawing. It is a figure which shows the header plate in the lower header member of 2nd Embodiment, Comprising: The figure (a) is side sectional drawing, The figure (b) is a top view. It is a figure which shows the header cover in the lower header member of 2nd Embodiment, Comprising: The figure (a) is side sectional drawing, The figure (b) is a top view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Core 6, 7 ... Heat exchange tube 10 ... Upper header member (entrance / exit header member)
DESCRIPTION OF SYMBOLS 11 ... Inlet side tank 11a ... Refrigerant inlet 12 ... Outlet side tank 20 ... Header plate 22 ... Engagement hole 30 ... Header cover 31 ... Partition wall (partition member)
32 ... Engagement projection 41 ... Shunt resistor plate 41a ... Refrigerant passage hole 42 ... Diffusion prevention resistor plate 42a ... Refrigerant passage hole 50 ... Lower header member (refrigerant turn side header member)
DESCRIPTION OF SYMBOLS 51 ... Inflow side tank 52 ... Outflow side tank 60 ... Header plate 62 ... Engagement hole 70 ... Header cover 71 ... Partition wall 71a ... Communication hole 72 ... Engagement protrusion A ... Air H ... Tube height P1 ... Upstream heat exchange Tube group P2 ... Downstream heat exchange tube group

Claims (19)

An upstream heat exchange tube group in which a plurality of heat exchange tubes are arranged in parallel at predetermined intervals and a core in which a downstream heat exchange tube group is arranged in the front-rear direction;
An inlet side tank disposed along one end side of the upstream heat exchange tube group;
An outlet tank disposed along one end of the downstream heat exchange tube group;
A refrigerant turn member disposed along the other end of both heat exchange tube groups,
One end of each heat exchange tube in the upstream heat exchange tube group is connected to the inlet side tank, and the other end is connected to the refrigerant turn member.
One end of each heat exchange tube in the downstream heat exchange tube group is connected to the outlet side tank, and the other end is connected to the refrigerant turn member.
The refrigerant flowing into the inlet side tank flows through the upstream side heat exchange tube group, the refrigerant turn member, and the downstream side heat exchange tube group and is introduced into the outlet side tank, while both heat exchanges are performed. The refrigerant flowing through the tube group is configured to evaporate by exchanging heat with the outside air,
The inlet side tank is provided with a diversion resistance means for diverting the refrigerant in the tank length direction,
The heat exchange tube has a plurality of heat exchange paths formed in parallel,
The diversion resistance means includes a diversion resistance plate that divides the inlet side tank into upper and lower sides and has a plurality of refrigerant passage holes formed at intervals along the tank length direction. Evaporator.   The evaporator according to claim 1, wherein a plurality of refrigerant passage holes in the shunt resistor plate are formed so as to have different hole diameters. A refrigerant inlet for introducing the refrigerant into the inlet side tank;
The evaporator according to claim 1 or 2, wherein a plurality of refrigerant passage holes in the shunt resistor plate are formed such that the hole diameters increase as the distance from the refrigerant inlet increases.   The evaporator according to any one of claims 1 to 3, wherein the number of refrigerant passage holes in the shunt resistor plate is smaller than the number of tubes in the upstream heat exchange tube group. An upstream heat exchange tube group in which a plurality of heat exchange tubes are arranged in parallel at predetermined intervals and a core in which a downstream heat exchange tube group is arranged in the front-rear direction;
An inlet side tank disposed along one end side of the upstream heat exchange tube group;
An outlet tank disposed along one end of the downstream heat exchange tube group;
A refrigerant turn member disposed along the other end of both heat exchange tube groups,
One end of each heat exchange tube in the upstream heat exchange tube group is connected to the inlet side tank, and the other end is connected to the refrigerant turn member,
One end of each heat exchange tube in the downstream heat exchange tube group is connected to the outlet side tank, and the other end is connected to the refrigerant turn member.
The refrigerant flowing into the inlet side tank flows through the upstream heat exchange tube group, the refrigerant turn member, and the downstream heat exchange tube group and is introduced into the outlet side tank, while both heat exchanges are performed. The refrigerant flowing through the tube group is configured to evaporate by exchanging heat with the outside air,
The inlet side tank is provided with a diversion resistance means for diverting the refrigerant in the tank length direction,
The heat exchange tube has a plurality of heat exchange paths formed in parallel,
The shunting resistance means is configured with a shunting resistance plate that partitions the inlet side tank up and down and has a plurality of refrigerant passage holes formed at intervals along the tank length direction,
The outlet side tank is provided with drift preventing resistance means for preventing drift of the refrigerant,
The drift prevention resistance means includes a drift prevention resistance plate that partitions the outlet side tank up and down and has a plurality of refrigerant passage holes formed at intervals along the tank length direction. A featured evaporator.   The evaporator according to claim 5, wherein an interval between adjacent refrigerant passage holes in the drift prevention resistance plate is set to a range of 1 to 4 times an interval between adjacent heat exchange tubes.   The evaporator according to claim 5 or 6, wherein the refrigerant passage hole in the resistance plate for drift prevention is arranged on the windward side with respect to the air intake direction of the evaporator with respect to the center position in the width direction of the heat exchange tube. . A refrigerant outlet for deriving the refrigerant from the outlet side tank;
The cross-sectional area of the hole arrange | positioned in the position farthest from a refrigerant | coolant exit among the said refrigerant | coolant passage holes in the said resistance plate for drift prevention is set to 7 mm < ² > or less, The any one of Claims 5-7. Evaporator.   The cross-sectional area between the drift prevention resistance plate and the end of the heat exchange tube in the outlet side tank is set in a range of 1 to 5 times the passage cross-sectional area of the heat exchange tube. The evaporator according to any one of claims 5 to 8.   The sum total of the cross-sectional area of the said refrigerant | coolant passage hole in the said resistance plate for drift prevention is set larger than the sum total of the passage cross-sectional area of the heat exchange tube in the said downstream heat exchange tube group. The evaporator according to item 1.   The evaporator according to any one of claims 5 to 10, wherein the number of refrigerant passage holes of the resistance plate for drift prevention is smaller than the number of tubes of the downstream heat exchange tube group.   The evaporator according to any one of claims 5 to 11, wherein a plurality of refrigerant passage holes in the shunt resistor plate are formed to have different hole diameters. A refrigerant inlet for introducing the refrigerant into the inlet side tank;
The evaporator according to any one of claims 5 to 12, wherein a plurality of refrigerant passage holes in the shunt resistor plate are formed such that the hole diameter increases as the distance from the refrigerant inlet increases.   The evaporator according to any one of claims 5 to 13, wherein the number of refrigerant passage holes in the shunt resistor plate is smaller than the number of tubes in the upstream heat exchange tube group.   The evaporator according to any one of claims 1 to 14, wherein heat exchange tubes corresponding to each other between the heat exchange tube groups are integrated with each other.   The evaporator according to any one of claims 1 to 15, wherein the heat exchange tube is constituted by an extruded tube obtained by extrusion molding.   The evaporator according to any one of claims 1 to 16, wherein a tube height of the heat exchange tube is set to 0.75 to 1.5 mm.   The evaporator according to any one of claims 1 to 17, wherein an inner fin is formed in an inward projecting shape on an inner peripheral wall surface of a heat exchange path in the heat exchange tube.   The evaporation according to any one of claims 1 to 18, further comprising an inlet / outlet header member, the inside of which is divided into front and rear by a partition member, and one side is configured as the inlet tank and the other side is configured as the outlet tank. vessel.

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