JP2014020598A - Condenser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a condenser capable of extending the width of a stable range in a charge graph.SOLUTION: In the condenser 1, a condensation section outlet header part 11 is provided in a first header tank 4. The bottom end of a second header tank 5 is positioned lower than the bottom end of a first header tank 4, while the top end thereof is positioned upper than the bottom end of the first header tank 4. A supercooling section inlet header part 12 is provided in a part of the second header tank 5, which is positioned lower than the bottom end of the first header tank 4. The second header tank 5 doubles as a liquid reserving part 2. The interior of the condensation section outlet header part 11 of the first header tank 4 is communicated to a part of the interior of the second header tank 5, which is positioned upper than the bottom end of the first header tank 4, through a communication part 21. A guide 27 is provided inside the second header tank 5 to guide downward a liquid phase principal refrigerant that flows into the liquid reserving part 2 through the communication part 21.

Description

  The present invention relates to a capacitor suitably used for, for example, a car air conditioner mounted on an automobile.

  Further, in this specification and claims, the top, bottom, left and right refer to the top, bottom, left, and right in FIGS. 1, 2, and 7.

  For example, as a condenser of a car air conditioner, a condensing part and a supercooling part are provided so that the former is located on the upper side, and a liquid reservoir part is provided between the condensing part and the supercooling part with the length direction directed vertically. And the condensing unit has at least one heat exchanging path composed of a plurality of heat exchanging tubes arranged in parallel with an interval in the vertical direction with the length direction directed in the left-right direction, and a lower end of the condensing unit A plurality of condensing unit outlet headers that communicate with the downstream end of the heat exchange path in the refrigerant flow direction, and the supercooling units are arranged in parallel at intervals in the vertical direction with the length direction directed in the horizontal direction At least one heat exchange path comprising the heat exchange pipes and the upstream side end in the refrigerant flow direction of the heat exchange path at the upper end of the supercooling section, which is arranged on either the left or right side of the condenser outlet header. To cooling unit inlet And the lower end of the liquid reservoir is located below the lower end of the condenser outlet header, and the upper end of the liquid reservoir is located above the lower end of the condenser outlet header. A header tank that is provided on one end side and to which the total heat exchange pipes of the condenser and the supercooling unit are connected, and a liquid reservoir that is formed separately from the header tank. Divided into two upper and lower sections by a partition wall, a condensing section outlet header section is provided in the upper section of the header tank, and a subcooling section inlet header section is provided in the lower section, and the inside of the condensing section outlet header section and the liquid reservoir A portion above the lower end of the condensing portion outlet header portion in the portion is communicated via the first communication portion, a portion below the first communication portion in the liquid reservoir portion, and a supercooling portion of the header tank The inside of the entrance header is second The liquid phase main refrigerant that has been communicated through the communication portion and has flowed out of the outlet portion of the condensing portion flows laterally into the liquid reservoir through the first communication portion, and the flow rate is reduced by the flow velocity reducing member. A capacitor is known in which a main refrigerant flows into a supercooling portion inlet header portion through a second communication portion (see Patent Document 1).

  According to the capacitor described in Patent Document 1, in a refrigeration cycle incorporating this capacitor, a charge as shown in FIG. 9 is obtained by determining the relationship between the degree of supercooling and the amount of refrigerant charged in order to determine the amount of refrigerant charged in the car air conditioner. When the graph is created, a stable region in which the degree of supercooling in the charge graph of FIG. 9 is constant when the portion above the center of the refrigerant inlet in the liquid reservoir is filled with the liquid phase refrigerant is obtained. It is done.

  However, in the capacitor described in Patent Document 1, when the liquid-phase main refrigerant that has flowed laterally from the condenser outlet header through the refrigerant outlet flows into the liquid reservoir through the refrigerant inlet, The flow is disturbed, and the gas phase refrigerant contained in the liquid phase main refrigerant in a bubble state rises. As a result, the width of the refrigerant filling amount in the stable region described above becomes relatively narrow, and a stable supercooling characteristic against load fluctuation or refrigerant leakage may not be obtained.

JP2003-302126A

  In view of the above circumstances, an object of the present invention is to provide a capacitor capable of widening the width of the stable region in the above-described charge graph.

  In order to achieve the above object, the present invention comprises the following aspects.

1) The condensing part and the supercooling part are provided so that the former is located on the upper side, and a liquid reservoir part is provided between the condensing part and the supercooling part with the length direction directed vertically. At least one heat exchange path composed of a plurality of heat exchange tubes arranged in parallel in the vertical direction and spaced apart in the vertical direction, and a refrigerant in the heat exchange path at the lower end of the condensing unit A condensing part outlet header part that communicates with the downstream end part in the flow direction, and the supercooling part has a length direction in the left-right direction and a plurality of heat exchange tubes arranged in parallel at intervals in the up-down direction. And at least one heat exchange path, and a supercooling section inlet header section that is arranged on either the left or right side of the condensing section outlet header section and communicates with an upstream end section in the refrigerant flow direction of the heat exchange path at the upper end of the supercooling section The bottom of the liquid reservoir is It is located below the lower end of the header part, and the upper end of the liquid reservoir is located above the lower end of the condenser outlet header part, and the condenser outlet header part in the condenser outlet header part and in the liquid reservoir part A condenser in which the liquid phase main refrigerant that has flowed out of the condensing unit outlet header portion flows into the liquid storage portion laterally through the communicating portion is communicated with a portion above the lower end via the communicating portion. Because
A capacitor provided with a guide for guiding the liquid-phase main refrigerant flowing into the liquid reservoir through the communication part downward at a height position corresponding to the liquid reservoir side end of the communication part in the liquid reservoir.

  2) The capacitor according to 1) above, wherein a flow velocity reducing member for reducing the flow velocity of the liquid-phase main refrigerant flowing into the liquid reservoir through the communication portion is provided at a guide start end of the guide or a portion downstream of the guide start end. .

  3) The capacitor as described in 1) or 2) above, wherein a frame member for holding the filter of the foreign substance removing member is integrally formed or assembled to the lower end of the guide.

  24 The first header tank to which the total heat exchange pipe of the condensing unit is connected to either one of the left and right end sides, and the second header tank to which the total heat exchange pipe of the supercooling unit is connected, It is provided so as to be positioned on the outer side in the left-right direction with respect to the first header tank, the condensation header outlet header is provided in the first header tank, and the lower end of the second header tank is located below the lower end of the first header tank. The upper end of the second header tank is located above the lower end of the first header tank and the lower header of the second header tank is located below the lower end of the first header tank. Also serves as a liquid reservoir, and the inside of the condensing part outlet header part of the first header tank and the part above the lower end of the first header tank in the second header tank are communicated via the communication part, 2 The liquid phase main refrigerant flowing out from the condenser outlet header flows into the second header tank, and the liquid main refrigerant guided downward by the guide flows into the subcooler inlet header. The capacitor according to any one of the above 1) to 3), wherein

  5) One heat exchange path is provided in the condensing part, and the total heat exchange pipe of the heat exchanging path of the condensing part is connected to the condensing part outlet header part of the first header tank. The capacitor as described in 4) above, wherein the lower part and the second header tank are communicated with each other via a communication part.

  6) a header tank provided on one of the left and right ends and connected to the total heat exchange pipes of the condensing unit and the supercooling unit, and a liquid reservoir formed separately from the header tank, The header tank is divided into two upper and lower sections by a partition wall, a condensing section outlet header section is provided in the upper section of the header tank, and a supercooling section inlet header section is provided in the lower section, inside the condensing section outlet header section. And a portion above the lower end of the condenser outlet header in the liquid reservoir via the first communication portion, a portion below the first communication in the liquid reservoir, and a header tank The inside of the supercooling section inlet header section is communicated with the second communication section, and the liquid phase main refrigerant flowing out from the condensing section outlet header section flows into the liquid reservoir section through the first communication section and is lowered by the guide. Liquid phase guided by Capacitor according to any one of the above 1) to 3) which medium is adapted to flow through the second communication portion to the supercooling part inlet header section.

  7) The flow rate reducing member is made of a net-like material, and is provided at the guide start end of the guide. The communication portion is connected to the inside of the condensing unit outlet header and the portion above the lower end of the condensing unit outlet header in the liquid reservoir. A refrigerant outlet is provided at the end of the liquid reservoir, and a viewpoint is set on a portion closer to the condenser outlet outlet than the refrigerant outlet on a horizontal line passing through the center of the refrigerant outlet and extending in the left-right direction, Further, the perspective projection of the upper half of the inner peripheral edge of the refrigerant outlet according to the one-point perspective method in which the angle between the projection line and the horizontal line is 45 degrees is drawn on the flow velocity reducing member 2) The capacitor according to any one of -6).

  8) The capacitor as described in 7) above, wherein the mesh of the flow velocity reducing member has an opening of 160 μm or less and an aperture ratio of 50% or less.

  9) The capacitor according to any one of 1) to 8) above, wherein a desiccant is disposed in the liquid reservoir so as not to interfere with the guide.

  According to the capacitors 1) to 9), the liquid-phase main refrigerant flowing into the liquid reservoir through the communication portion is placed at a height corresponding to the liquid reservoir-side end of the communication portion in the liquid reservoir. Therefore, the liquid-phase main refrigerant that has flowed sideways through the refrigerant inlet is guided downward by the guide. As a result, the gas-phase refrigerant contained in the liquid-phase main refrigerant in a bubble state is also forcibly moved downward together with the liquid-phase main refrigerant, and above the center in the vertical direction of the communication portion in the liquid reservoir. This part is quickly filled with the liquid refrigerant. Therefore, it is possible to effectively widen the width of the refrigerant filling amount in the stable region where the degree of supercooling in the charge graph shown in FIG. 9 is constant as compared with the capacitor described in Patent Document 1, Stable supercooling characteristics against refrigerant leakage can be obtained.

  According to the capacitor of 2) above, the flow velocity of the liquid phase main refrigerant flowing into the liquid reservoir through the communication portion is reduced by the flow rate lowering member. It becomes easier to flow downward. Therefore, the gas phase refrigerant contained in the liquid phase main refrigerant in a bubble state also efficiently moves downward together with the liquid phase main refrigerant, and the portion above the center in the vertical direction of the communicating portion in the liquid reservoir is quickly liquefied. It will be filled with phase refrigerant. As a result, the width of the refrigerant filling amount in the stable region where the degree of supercooling in the charge graph shown in FIG. 9 is constant can be made wider than that of the capacitor described in Patent Document 1, and it is possible to prevent load fluctuations and refrigerant leakage. On the other hand, a stable supercooling characteristic can be obtained.

  According to the capacitor of 6), the length of the heat exchange pipe of the total heat exchange path of the subcooling section is longer than the length of the heat exchange pipe of the total heat exchange path of the condensation section. As compared with the above, the area of the heat exchanging portion is increased, and the refrigerant supercooling efficiency is improved.

  According to the capacitor of the above 7, the flow rate of most of the liquid phase main refrigerant flowing into the liquid reservoir through the communication part can be reduced by the flow rate reducing member.

  According to the capacitor of 8), the flow rate of the liquid-phase main refrigerant flowing into the liquid reservoir through the communicating portion can be effectively reduced by the flow velocity reducing member.

  According to the capacitor 9), the function of the flow velocity reducing member is prevented from being hindered by the desiccant disposed in the liquid reservoir.

1 is a front view specifically showing the overall configuration of a first embodiment of a capacitor according to the present invention; FIG. 2 is a front view schematically showing the capacitor of FIG. 1. It is an AA line expanded sectional view of FIG. FIG. 4 is a sectional view taken along line BB in FIG. 3. It is a disassembled perspective view which shows the principal part of the capacitor | condenser of FIG. It is a figure which shows the net-like object used as the flow velocity fall member in the capacitor | condenser of FIG. FIG. 5 is a view corresponding to FIG. 4 showing a configuration of a main part of a second embodiment of the capacitor according to the present invention. It is a perspective view which shows the guide and foreign material removal member which are used for the capacitor | condenser of FIG. It is a charge graph which shows the relationship between a supercooling degree and the refrigerant | coolant enclosure amount.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the following description, the back side of the sheet of FIG. 1 is the front, and the opposite side is the back.

  In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.

  Furthermore, the same parts and the same parts are denoted by the same reference numerals throughout the drawings, and redundant description is omitted.

  FIG. 1 specifically shows the overall configuration of the first embodiment of the capacitor according to the present invention, FIG. 2 schematically shows the capacitor of FIG. 1, and FIGS. 3 to 6 show the configuration of the main part of the capacitor of FIG. Indicates. In FIG. 2, illustration of individual heat exchange tubes is omitted, and illustration of corrugated fins, side plates, a refrigerant inlet member, and a refrigerant outlet member is also omitted.

  1 and 2, the condenser (1) is provided with a condensing part (1A) and a supercooling part (1B) so that the former is located on the upper side, and the condensing part (1A) and the supercooling part ( 1B) is provided with a liquid reservoir (2) whose length direction is directed vertically. The condenser (1) has a plurality of flat aluminum heat exchange tubes (3A) (3B) arranged at intervals in the vertical direction with the width direction facing the ventilation direction and the length direction facing the left-right direction. And three aluminum header tanks (4), (5), (6) that are arranged with the length direction facing up and down and the left and right ends of the heat exchange tubes (3A) (3B) are connected by brazing And aluminum corrugated fins (7A) (7B) brazed to the heat exchange tubes (3A) (3B) between the adjacent heat exchange tubes (3A) (3B) and outside the upper and lower ends. And aluminum side plates (8) disposed on the outer sides of the corrugated fins (7A) and (7B) at both upper and lower ends and brazed to the corrugated fins (7A) and (7B).

  The condenser (1A) and the supercooling section (1B) of the condenser (1) each have at least one heat exchange pipe (3A) (3B) arranged in a row in the vertical direction, one heat here. An exchange path (P1) (P2) is provided, the heat exchange path (P1) provided in the condensing part (1A) becomes a refrigerant condensing path, and the heat exchange path (P2 provided in the supercooling part (1B)) ) Is the refrigerant supercooling path. Then, the refrigerant flow directions of all the heat exchange tubes (3A) (3B) constituting each heat exchange path (P1) (P2) are the same, and the heat exchange tubes of two adjacent heat exchange paths ( The refrigerant flow directions of 3A and 3B are different. Here, the heat exchange path (P1) of the condensing part (1A) is referred to as a first heat exchange path, and the heat exchange path (P2) of the supercooling part (1B) is referred to as a second heat exchange path.

  On the left end side of the condenser (1) is a first header tank (with the left end of the total heat exchange pipe (3A) of the first heat exchange path (P1) provided in the condenser (1A) connected by brazing. 4) and the second header tank (5) in which the left end of the heat exchange pipe (3B) of the second heat exchange path (P2) provided in the supercooling section (1B) is connected by brazing. Two header tanks (5) are provided separately so as to be located on the outer side in the left-right direction. The upper end of the second header tank (5) is above the lower end of the first header tank (4), here, at the same height as the upper end of the first header tank (4). The lower end of the second header tank (5) is located below the lower end of the first header tank (4), and is located below the first header tank (4) in the second header tank (5). The second heat exchange pipe (3B) constituting the second heat exchange path (P2) is connected to the portion to be brazed by brazing. The second header tank (5) also serves as a liquid reservoir (2) that stores the liquid-phase main refrigerant condensed by the condensing unit (1A) and supplies the liquid-phase main refrigerant to the supercooling unit (1B).

  The condensing part where the downstream end part in the refrigerant flow direction of the first heat exchange path (P1) of the condensing part (1A) (the heat exchanging path at the lower end of the condensing part (1A)) communicates with the entire first header tank (4). An outlet header portion (11) is provided. In the portion of the second header tank (5) located below the lower end of the first header tank (4), the second heat exchange path (P2) of the supercooling part (1B) (the upper end of the supercooling part (1B)) The subcooling portion inlet header portion (12) that communicates with the upstream end portion of the refrigerant flow direction in the refrigerant flow direction is provided.

  Here, the heat exchange pipe (3A) connected to the first header tank (4) is called a first heat exchange pipe, and the heat exchange pipe (3B) connected to the second header tank (5) is a second heat. This is called an exchange tube. Also, between the adjacent first heat exchange tubes (3A), between the first heat exchange tube (3A) at the upper end and the upper side plate (8), and between the first heat exchange tube (3A) at the lower end and the upper end The corrugated fin (7A) disposed between the second heat exchange pipe (3B) is referred to as the first corrugated fin, and the second heat exchange pipe between the adjacent second heat exchange pipes (3B) and at the lower end. The corrugated fin (7B) disposed between (3B) and the lower side plate (8) is referred to as a second corrugated fin.

  A third header tank connected to the right end of the condenser (1) is connected to the right ends of all the heat exchange pipes (3A) (3B) constituting the first and second heat exchange paths (P1) (P2). (6) is arranged. The cross-sectional shape of the third header tank (6) is the same as that of the first header tank (4).

  The third header tank (6) is divided into two upper and lower sections by an aluminum partition member (13) provided at a height between the first heat exchange path (P1) and the second heat exchange path (P2). (6a) (6b) is a condensing unit inlet header that is divided into the entire upper section (6a) and communicates with the upstream end of the first heat exchange path (P1) of the condensing unit (1A) in the refrigerant flow direction. (14) is provided, and in the same way, the lower section (6b) has a supercooling section outlet header section that communicates with the downstream end of the second heat exchange path (P2) of the subcooling section (1B) in the refrigerant flow direction ( 15) is provided. A refrigerant inlet (16) is formed in the middle of the height direction of the condenser inlet header (14) of the third header tank (6), and a refrigerant outlet (17) is formed at the subcooling outlet (15). Has been. In addition, a refrigerant inlet member (18) that communicates with the refrigerant inlet (16) and a refrigerant outlet member (19) that communicates with the refrigerant outlet (17) are joined to the third header tank (6).

  As shown in FIGS. 3 to 5, the first header tank (4) has a portion below the middle of the height in the condenser outlet header (11) and closer to the lower end, and the second header tank (5 ) Is connected to a portion above the lower end of the condensing unit outlet header (11) through the communication unit (21). The communication portion (21) includes a through hole (22) formed in the peripheral wall (4a) of the first header tank (4) and the first header tank (4) in the peripheral wall (5a) of the second header tank (5). The through-holes (23) formed at the same height as the through-holes (22) of the first header tank (4) and the second header tank (5) are disposed between the two header tanks (4). A horizontal tubular aluminum communication member (24) brazed to (5) and having a flow path (25) passing through the through holes (22) and (23) of both header tanks (4) and (5). ing. An outwardly projecting portion (24a) located between the header tanks (4) and (5) is formed at the center in the length direction of the communicating member (24), and the outwardly projecting portion (24) of the communicating member (24) ( The right part of 24a) is inserted into the through hole (22) of the first header tank (4) and brazed to the peripheral wall (4a) of the first header tank (4), and the left part is the second header tank ( It is inserted into the through hole (23) of 5) and brazed to the peripheral wall (5a) of the second header tank (5). The left end opening of the flow path (25) of the communication member (24) serves as a refrigerant inlet (26) through which the liquid phase main refrigerant flows into the liquid reservoir (2). The shape of both the through holes (22) and (23) and the cross-sectional shape of the communication member (24) are vertically long circles.

  In the second header tank (5), which is the liquid reservoir (2), the liquid reservoir from the refrigerant inlet (26) through the flow path (25) of the communication member (24) constituting the communication portion (21). (2) A synthetic resin guide (27) is provided for guiding the liquid-phase main refrigerant flowing horizontally into the lower part. The guide (27) has a bent refrigerant flow path having one end provided in the right cylindrical portion (28a) of the outer peripheral surface (28) and extending in the vertical direction and the other end opened in the lower surface. (29) is provided. From the upper part to the left part of the inner circumferential surface of the refrigerant flow path (29), the flow direction of the refrigerant flowing from the opening (29a) to the concave cylindrical part (28a) of the refrigerant flow path (29) is changed downward. An arcuate guide portion (29c) leading to the downward opening (29b) is provided. The outer peripheral surface (28) of the guide (27) is provided with a lightening portion (28b) for weight reduction.

A communicating member constituting the communicating portion (21) so that the concave cylindrical portion (28a) of the outer peripheral surface (28) of the guide (27) closes the rightward opening (29a) of the refrigerant flow path (29). A flow rate reducing member (30) for reducing the flow rate of the liquid phase main refrigerant flowing laterally from the refrigerant inlet (26) into the liquid reservoir (2) through the flow path (25) of (24) is fixed. Yes. That is, the flow velocity reducing member (30) is provided at the guide start end of the guide (27). Instead of this, the flow velocity lowering member (30) may be provided in a portion downstream of the opening (29a) of the refrigerant channel (29), that is, in a portion downstream of the guide start end. The flow rate reducing member (30) is made of a net-like material, and preferably has an opening of 160 μm or less and an opening ratio of 50% or less. Here, the aperture ratio is {mesh of mesh / (diameter of wire constituting mesh + mesh)} ² × 100 (%). The size of the flow velocity reducing member (30) and the distance between the flow velocity reducing member (30) and the refrigerant inlet (26) are preferably determined as follows. That is, as shown in FIG. 6, it passes through the center (O) of the refrigerant inlet (26) and extends in the left-right direction at a portion closer to the condenser outlet header (11) than the refrigerant inlet (26). The perspective projection (FA) of the upper half of the inner peripheral edge of the refrigerant inlet (26) according to the one-point perspective method in which the viewpoint is set and the angle between the projection line and the horizontal line is 45 degrees is a flow velocity reducing member ( 30) As depicted above, the size of the flow velocity reducing member (30) and the distance between the flow velocity reducing member (30) and the refrigerant inlet (26) are preferably determined. Furthermore, a viewpoint is set at a portion closer to the condenser outlet header (11) than the refrigerant inlet (26) on the horizontal line passing through the center (O) of the refrigerant inlet (26) and extending in the left-right direction, and further projected. The perspective projection (FB) of the lower half of the inner peripheral edge of the refrigerant inlet (26) according to the one-point perspective method in which the angle between the line and the horizontal line is 45 degrees is not necessarily drawn on the flow velocity reducing member (30). Although not necessary, on the flow velocity reducing member (30) in FIG. 6, the portions corresponding to the left and right ends of the upper perspective projection (FA) and the lower end of the refrigerant inlet (26) on the flow velocity reducing member (30) It is also preferable that an arc (X) connecting the three points is also present. This is because the refrigerant accumulated in the lower part of the condenser outlet header (11) contains almost no gas-phase refrigerant, and passes through the lower part of the flow path (25) and the lower part of the refrigerant inlet (26). The refrigerant flowing out into the liquid reservoir (2) also contains almost no gas-phase refrigerant, so the portion below the arc (X) in the lower perspective view (FB) is the flow velocity reducing member (30 This is because it does not need to be drawn above.

  A foreign matter removing member (31) for removing foreign matter contained in the refrigerant is disposed in the second header tank (5). The foreign matter removing member (31) is arranged with a bottomed cylindrical synthetic resin frame member (32) which is arranged with its length direction directed in the vertical direction and has an upper end opened and a lower end closed, and a frame member (32 And a net-like filter (34) that closes the plurality of communication ports (33) formed in the peripheral wall (32a). The frame member (32) has an upper end positioned between the first heat exchange path (P1) and the second heat exchange path (P2), and a lower end of the heat of the lower end of the second heat exchange path (P2). It is located above the exchange pipe (3B) and is formed integrally with the guide (27). A flat portion (32b) is provided on a part of the peripheral wall (32a) of the frame member (32), that is, on the right side portion so as not to interfere with the left end portion of the heat exchange pipe (3B) of the second heat exchange path (P2). Yes.

  The foreign matter removing member (31) is inserted into the slit (35) formed in the peripheral wall (5a) of the second header tank (5) from the outside and brazed to the peripheral wall (5a) (36). ). The plate-like body (36) has a through hole (37) through which the frame member (32) of the foreign matter removing member (31) is passed, and the frame member (32) is passed through the through hole (37) from above, An outward flange portion (38) formed at the upper end of the peripheral wall (32a) of the frame member (32) is placed on a portion around the through hole (36) in the plate-like body (35).

  A desiccant storage container (39) filled with a desiccant (not shown) is disposed in a portion of the second header tank (5) above the plate-like body (36). The desiccant storage container (39) is made of a material that allows passage of the refrigerant but prevents passage of the desiccant.

  The condenser (1) constitutes a refrigeration cycle together with a compressor, an expansion valve (decompressor) and an evaporator, and is mounted on a vehicle as a car air conditioner.

  In the condenser (1) having the above-described configuration, the high-temperature and high-pressure gas-phase refrigerant compressed by the compressor passes through the refrigerant inlet member (18) and the refrigerant inlet (16), and enters the condenser section inlet of the third header tank (6). The refrigerant flows into the header (14) and is condensed while flowing leftward in the first heat exchange pipe (3A) of the first heat exchange path (P1), and the liquid-phase main refrigerant becomes the first header tank (4 ) Into the condensing part outlet header part (11). The liquid-phase main refrigerant that has flowed into the condensing part outlet header part (11) of the first header tank (4) flows through the flow path (25) of the communicating member (24) constituting the communicating part (21). From the inlet (26), it flows sideways into the second header tank (5), which is the liquid reservoir (2), passes through the opening (29a), flows into the refrigerant flow path (29) of the guide (27), It is guided by the guide part (29c) and forced to flow downward. Further, when the liquid-phase main refrigerant that has flowed sideways into the second header tank (5) flows into the refrigerant flow path (29) through the opening (29a), it passes through the flow velocity reducing member (30). As a result, the flow velocity is reduced, so that it is easy to flow downward in combination with the function of the guide portion (29c) of the guide (27).

  The gas phase refrigerant contained in the liquid phase main refrigerant in a bubble state is also moved downward together with the liquid phase main refrigerant. The liquid-phase main refrigerant including the gas-phase refrigerant in the bubble state and flowing downward is the lower end opening (29b) of the refrigerant flow path (29), the upper end opening of the frame member (32) of the foreign matter removing member (31), and the communication. It enters the supercooling section inlet header section (12) through the filter (34) disposed in the mouth (33). Therefore, the portion above the center in the vertical direction of the refrigerant inlet (26) in the communicating member (24) of the communicating portion (21) in the liquid reservoir (2) is quickly filled with the liquid phase refrigerant. 9, it is possible to widen the amount of refrigerant filling in the stable region where the degree of supercooling in the charge graph shown in FIG. 9 is constant as compared with the capacitor described in Patent Document 1, and against the load fluctuation and refrigerant leakage. Stable supercooling characteristics can be obtained.

  The refrigerant that has entered the supercooling section inlet header section (12) enters the second heat exchange pipe (3B) of the second heat exchange path (P2) and flows to the right in the second heat exchange pipe (3B). After being supercooled in between, it enters the supercooler outlet header part (15) of the third header tank (6), flows out through the refrigerant outlet (17) and the refrigerant outlet member (19), Then it is sent to the evaporator.

  In the condenser shown in FIG. 1 and FIG. 2, a plurality of heat exchange paths composed of a plurality of heat exchange tubes (3A) arranged continuously in the vertical direction are provided in the condenser (1A) side by side. (1B) may be provided with at least one heat exchange path composed of a plurality of heat exchange tubes (3B) arranged continuously in the vertical direction. When a plurality of heat exchange paths are provided vertically in the condensing unit (1A), in the first header tank (4) and so that the refrigerant sequentially flows from the upper end heat exchange path to the lower end heat exchange path. The inside of the third header tank (6) is partitioned into a plurality of header parts by partition members provided at appropriate height positions, and the header part at the lower end of the first header tank (4) is the condenser outlet header part (11 ). When a plurality of heat exchange paths are provided in the supercooling section (1B) vertically, the second header tank (5) is arranged so that the refrigerant sequentially flows from the upper end heat exchange path toward the lower end heat exchange path. ) And the third header tank (6) are divided into a plurality of header sections by partition members provided at appropriate height positions, and the header section at the upper end of the second header tank (5) is the inlet of the supercooling section. It becomes the header part (12).

  7 and 8 show a second embodiment of the capacitor according to the present invention.

  In FIG. 7, the condenser (60) is provided with a condensing part (60A) and a supercooling part (60B) so that the former is located on the upper side, and the condensing part (60A) and the supercooling part (60B) In between, a liquid reservoir (61) whose length direction is directed in the vertical direction is provided separately from the condensing part (60A) and the supercooling part (60B). The condenser (60) has a plurality of flat aluminum heat exchange tubes (62) spaced apart in the vertical direction with the width direction facing the ventilation direction and the length direction facing the left-right direction, and a long Two aluminum header tanks (63), (64), which are arranged with the vertical direction and the left and right ends of the heat exchange pipe (62) are connected by brazing, and adjacent heat exchange pipes (62 ) Aluminum corrugated fins (65) brazed to the heat exchange pipe (62) between the upper and lower ends and between the upper and lower ends, and corrugated fins (65) disposed outside the upper and lower corrugated fins (65) And an aluminum side plate (66) brazed to 65).

  The condenser section (60A) of the condenser (60) has at least one, in this case, three heat exchange paths (P1), (P2), and (P3) consisting of a plurality of heat exchange pipes (62) arranged vertically. Is provided. In addition, the supercooling section (60B) of the condenser (60) is provided with at least one, in this case, one heat exchange path (P4) composed of a plurality of heat exchange tubes (62) arranged continuously in the vertical direction. ing. Three heat exchange paths (P1), (P2), and (P3) provided in the condensing part (60A) serve as a refrigerant condensing path, and one heat exchange path (P4) provided in the supercooling part (60B) serves as a refrigerant excess. It is a cooling path. In addition, the refrigerant flow directions of all the heat exchange tubes (62) constituting each heat exchange path (P1) (P2) (P3) (P4) are the same, and the heat of two adjacent heat exchange paths The direction of refrigerant flow in the exchange pipe (62) is different. Here, the three heat exchange paths (P1), (P2), and (P3) of the condenser section (60A) are referred to as the first to third heat exchange paths in order from the top, and the heat exchange paths (P4 of the subcooling section (60B)). ) Is referred to as a fourth heat exchange path.

  In the left and right header tanks (63), (64) of the condenser (60), the partition members (67) (67) (in the height positions between the third heat exchange path (P3) and the fourth heat exchange path (P4)) 68) is divided into two upper and lower compartments (63a), (63b), (64a) and (64b), thereby condensing the gas-phase refrigerant into a liquid phase and a condensing unit (60A). And a supercooling section (60B) for supercooling the liquid refrigerant condensed in (1) so that the former is positioned above.

  The upper section (63a) above the partition member (67) in the left header tank (63) of the condenser (60) is between the second heat exchange path (P2) and the third heat exchange path (P3). At the height position, the aluminum dividing member (69) causes the downstream end of the first heat exchange path (P1) of the condensing part (60A) in the refrigerant flow direction and the upstream of the second heat exchange path (P2) in the refrigerant flow direction. It is divided into a left intermediate header portion (71) that communicates with the side end portion and a condensing portion outlet header portion (72) that communicates with the downstream end portion in the refrigerant flow direction of the third heat exchange path (P3). The upper section (64a) above the partition member (68) in the right header tank (64) of the condenser (60) is between the first heat exchange path (P1) and the second heat exchange path (P2). At the height position, the aluminum dividing member (73) causes the condenser portion inlet header (74) to communicate with the upstream end of the first heat exchange path (P1) in the refrigerant flow direction, and the second heat exchange path (P2). Of the third heat exchange path (P3) and the right intermediate header portion (75) that communicates with the upstream end of the third heat exchange path (P3).

  The upstream end of the fourth heat exchange path (P4) in the refrigerant flow direction leads to the entire lower section (63b) below the partition member (67) in the left header tank (63) of the condenser (60). A supercooling section inlet header section (76) is provided, and the refrigerant in the fourth heat exchange path (P4) is disposed in the entire lower section (64b) below the partition member (68) in the right header tank (64). A subcooling section outlet header section (77) that communicates with the downstream end portion in the flow direction is provided. A refrigerant inlet (not shown) is formed in the upper part of the condensing part inlet header part (74) of the right header tank (6), and a refrigerant outlet (not shown) is formed in the supercooling part outlet header part (77). The refrigerant inlet member (78) leading to the refrigerant inlet and the refrigerant outlet member (79) leading to the refrigerant outlet are joined to the right header tank (64).

  The liquid reservoir (61) has an aluminum base member (81) fixed to the lower part of the left header tank (63) by brazing, etc., a cylindrical shape with the upper end closed and the lower end opened, and the base An aluminum liquid reservoir main body (82) detachably attached to the member (81), and the upper end of the liquid reservoir (61) is located above the lower end of the condenser outlet header (72). The lower end is located below the upper end of the supercooling unit inlet header (76).

  As shown in FIG. 8, the base member (81) has a cylindrical shape with the lower end closed and the upper end opened, and the condensing portion outlet of the left header tank (63) in the peripheral wall (81a) of the base member (81). The part corresponding to the lower part of the height of the header part (72) and the part corresponding to the upper part of the height of the header part (76) of the supercooling part inlet of the left header tank (63). The fixed portions (83) and (84) are formed to protrude rightward, and the tip of the upper fixed portion (83) is the peripheral wall (72a) of the condensing portion outlet header portion (72) in the left header tank (63). The lower fixing portion (84) is also brazed to the peripheral wall (76a) of the supercooling portion inlet header portion (76) in the left header tank (63). A male screw (86) is formed on the outer peripheral surface of the upper end portion of the base member (81). On the inner peripheral surface of the lower end of the liquid reservoir body (82), a female screw (87) is formed that is screwed onto the male thread (86) of the base member (81), and the lower end of the liquid reservoir body (82). The liquid reservoir main body (82) is detachably attached to the base member (81) by screwing the portion on the upper end of the base member (81), and the lower end opening of the liquid reservoir main body (82) is the base member. Closed by (81).

  The portion of the left header tank (63) that is below the middle of the height in the condenser outlet header (72) and near the lower end, and the condenser outlet header (72) in the liquid reservoir (61). A portion above the lower end is communicated with the first communicating portion (85). The first communication part (85) is formed at a position corresponding to the tip of the upper fixing part (83) of the base member (81) in the peripheral wall (72a) of the condensing part outlet header part (72) of the left header tank (63). And the through hole (88) of the left header tank (63) and the base formed from the inner peripheral surface of the peripheral wall (81a) of the base member (81) to the tip of the upper fixing portion (83). A flow path (89) that passes through the inside of the member (81), and the opening on the peripheral wall (81a) side of the base member (81) in the flow path (89) is a liquid phase main refrigerant in the base member (81). It is a refrigerant inlet (91) through which the water flows.

  In addition, the upper part of the left header tank (63) above the middle in the supercooling part inlet header (76) and the lower end of the condensing part outlet header (72) in the liquid reservoir (61) The lower portion is communicated with the second communicating portion (92). The second communicating portion (92) is a through hole formed at a position corresponding to the tip of the lower fixing portion (84) in the peripheral wall (76a) of the supercooling portion inlet header portion (76) of the left header tank (63). (93) and the through hole (93) of the left header tank (63) and the base member (81) formed from the inner peripheral surface of the peripheral wall (81a) of the base member (81) to the tip of the lower fixing portion (84). ) And a flow path (94) for passing through the inside.

  The base member (81) of the liquid reservoir (61) passes from the refrigerant inlet (91) through the flow path (89) of the first communication portion (85) into the base member (81) of the liquid reservoir (61). A synthetic resin guide (27) is provided for guiding the liquid-phase main refrigerant flowing horizontally into the interior downward. The structure of the guide (27) is the same as that of the guide (27) used in the capacitor (1) of the first embodiment described above. The size of the flow velocity reducing member (30) of the guide (27) and the distance between the flow velocity reducing member (30) and the refrigerant inlet (91) are the same as in the case of the capacitor (1) of the first embodiment. It is preferable that it is determined.

  A foreign substance removing member (95) for removing foreign substances contained in the refrigerant is disposed in the base member (81) of the liquid reservoir (61). The foreign matter removing member (95) is arranged with the length direction thereof directed vertically, and the upper end is formed between the flow path (89) of the upper fixed portion (83) and the flow path (94) of the lower fixed portion (84). A bottomed cylindrical synthetic resin frame member (96) located between and having an upper end opened and a lower end closed, and a plurality of communication holes formed on the peripheral wall (96a) of the frame member (96) And a net-like filter (98) for closing the mouth (97). A plate-like partition member (99) that partitions the liquid reservoir (61) vertically is formed at the upper end of the peripheral wall (96a) of the frame member (96). A guide (27) is formed integrally with the partition member (99).

  The condenser (60) constitutes a refrigeration cycle together with a compressor, an expansion valve (decompressor) and an evaporator, and is mounted on a vehicle as a car air conditioner.

  In the condenser (60) configured as described above, the high-temperature and high-pressure gas-phase refrigerant compressed by the compressor passes through the refrigerant inlet member (78) and the refrigerant inlet, and enters the condenser inlet header (74) of the right header tank (64). ) And is condensed while flowing to the left in the heat exchange pipe (62) of the first heat exchange path (P1) and flows into the left intermediate header (71) of the left header tank (63). To do. The refrigerant that has flowed into the left intermediate header portion (71) of the left header tank (63) is condensed while flowing to the right in the heat exchange pipe (62) of the second heat exchange path (P2), and the right header. It flows into the right intermediate header section (75) of the tank (64) and is further condensed while flowing to the left in the heat exchange pipe (62) of the third heat exchange path (P3). ) Flows into the condensing part outlet header part (72). The liquid phase main refrigerant that has flowed into the condensing part outlet header part (72) of the left header tank (63) passes through the through hole (88) and the flow path (89) that constitute the first communication part (92). From the inflow port (91), it flows horizontally into the liquid reservoir (61), passes through the opening (29a), flows into the refrigerant channel (29) of the guide (27), and is guided by the guide (29c). And forced to flow downward. Further, when the liquid-phase main refrigerant that has flowed sideways into the second header tank (5) flows into the refrigerant flow path (29) through the opening (29a), it passes through the flow velocity reducing member (30). As a result, the flow velocity is reduced, so that it is easy to flow downward in combination with the function of the guide portion (29c) of the guide (27).

  The gas phase refrigerant contained in the liquid phase main refrigerant in a bubble state is also moved downward together with the liquid phase main refrigerant. The liquid main refrigerant including the gas-phase refrigerant in the bubble state and flowing downward includes the lower end opening (29b) of the refrigerant flow path (29), the upper end opening of the frame member (96) of the foreign matter removing member (95), and the communication port. The supercooling section inlet header section (76) enters the supercooling section inlet header section (76) through the filter (98) disposed in (97) and the second communication section (92). Therefore, the portion above the center in the vertical direction of the refrigerant inlet (91) of the first communicating portion (85) in the liquid reservoir (61) is quickly filled with the liquid phase refrigerant, as shown in FIG. In the charge graph shown, it is possible to widen the range of refrigerant filling amount in a stable region where the degree of supercooling is constant as compared with the capacitor described in Patent Document 1, and stable supercooling against load fluctuations and refrigerant leakage Characteristics can be obtained.

  The refrigerant that has entered the supercooling section inlet header section (76) enters the heat exchange pipe (62) of the fourth heat exchange path (P4), and supercools while flowing in the heat exchange pipe (62) to the right. After that, it enters the supercooling part outlet header part (77) of the right header tank (64), flows out through the refrigerant outlet and the refrigerant outlet member (79), and is sent to the evaporator through the expansion valve.

  The liquid reservoir (61) of the capacitor (60) of the third embodiment described above has the same configuration as the guide (31) of the capacitor (50) of the second embodiment, and the first communicating portion (87). There may be provided a guide (31) for guiding the liquid-phase main refrigerant flowing laterally through the lower side. Further, the number of heat exchange paths of the condenser section (60A) and the supercooling section (60B) of the condenser (60) of the third embodiment described above is not limited to that described above.

  The capacitor | condenser by this invention is used suitably for the car air conditioner mounted in a motor vehicle.

(1) (60): Capacitor
(1A) (60A): Condensing part
(1B) (60B): Supercooling section
(2) (61): Liquid reservoir
(3A) (3B) (62): Heat exchange pipe
(4): First header tank
(5): Second header tank
(6): Third header tank
(11): Condenser outlet header
(12): Supercooler inlet header
(21): Communication part
(26): Refrigerant inlet
(27): Guide
(30): Flow velocity reducing member
(39): Desiccant storage container
(63): Left header tank
(64): Right header tank
(72): Condenser outlet header
(76): Supercooler inlet header
(85): 1st communication part
(91): Refrigerant inlet
(92): Second communication part

Claims (9)

The condensing part and the supercooling part are provided so that the former is positioned on the upper side, and a liquid reservoir part is provided between the condensing part and the supercooling part with the length direction directed in the vertical direction. The flow direction of refrigerant in at least one heat exchange path comprising a plurality of heat exchange tubes arranged in parallel in the vertical direction with the length direction turned in the left-right direction and the heat exchange path at the lower end of the condensing unit A condensing part outlet header part that communicates with the downstream end part, and the supercooling part comprises at least a plurality of heat exchange pipes arranged in parallel at intervals in the vertical direction with the length direction directed in the horizontal direction One heat exchange path and a supercooling section inlet header section that is arranged on the same side of the condenser outlet header as well as the upstream end of the heat exchange path at the upper end of the supercooling section. The bottom of the liquid reservoir is at the outlet of the condenser The condensing unit outlet header portion in the condensing unit outlet header portion and the condensing unit outlet header portion is located below the lower end of the header portion and the upper end of the liquid reservoir portion is located above the lower end of the condensing portion outlet header portion. The liquid phase main refrigerant that has flowed out of the outlet header portion of the condensing part flows into the liquid reservoir part sideways through the communicating part. A capacitor,
A capacitor provided with a guide for guiding the liquid-phase main refrigerant flowing into the liquid reservoir through the communication part downward at a height position corresponding to the liquid reservoir side end of the communication part in the liquid reservoir. The capacitor according to claim 1, further comprising a flow velocity reducing member that reduces a flow velocity of the liquid-phase main refrigerant flowing into the liquid reservoir through the communication portion at a guide start end of the guide or a portion downstream of the guide start end. The capacitor according to claim 1, wherein a frame member that holds a filter of the foreign matter removing member is integrally formed or assembled to the lower end of the guide. The first header tank to which the total heat exchange pipe of the condensing unit is connected to either one of the left and right end sides, and the second header tank to which the total heat exchange pipe of the supercooling unit is connected are the second header tank The first header tank is provided with a condensing portion outlet header portion, and the lower end of the second header tank is positioned below the lower end of the first header tank. The upper end is located above the lower end of the first header tank, and a subcooling portion inlet header is provided in a portion of the second header tank located below the lower end of the first header tank. It also serves as a liquid reservoir, and the inside of the condensing part outlet header part of the first header tank and the part above the lower end of the first header tank in the second header tank are communicated via the communication part, He A guide is provided in the tank, the liquid phase main refrigerant flowing out from the outlet header portion of the condensing part flows into the second header tank, and the liquid phase main refrigerant guided downward by the guide flows into the subcooler inlet header part. The capacitor according to any one of claims 1 to 3, wherein the capacitor is configured to perform. One heat exchange path is provided in the condensing part, and the total heat exchange pipe of the heat exchanging path of the condensing part is connected to the condensing part outlet header part of the first header tank, from the middle of the height of the condensing part outlet header part The capacitor according to claim 4, wherein the lower portion and the second header tank are communicated with each other via a communication portion. A header tank provided on one of the left and right ends and connected to the total heat exchange pipes of the condensing unit and the supercooling unit; and a liquid reservoir formed separately from the header tank. Is divided into two upper and lower sections by a partition wall, a condensing section outlet header section is provided in the upper section of the header tank, a supercooling section inlet header section is provided in the lower section, and the inside of the condensing section outlet header section and the liquid A portion above the lower end of the condenser outlet header in the reservoir is communicated via the first communication portion, and a portion below the first communication in the liquid reservoir and the supercooling of the header tank The liquid phase main refrigerant flowing out from the condenser outlet header part flows into the liquid reservoir part through the first communication part and is guided downward by the guide. Liquid phase cooling There capacitor according to any one of claims 1 to 3 is adapted to flow into through the second communication portion to the supercooling part inlet header section. The flow rate reducing member is made of a net-like material, and is provided at the guide start end of the guide. The liquid reservoir in the communication portion is connected through the inside of the condenser outlet header portion and the portion above the lower end of the condenser outlet header portion in the liquid reservoir. A refrigerant outlet is provided at the end of the unit, and a viewpoint is set on the portion closer to the condenser outlet header than the refrigerant outlet on the horizontal line that passes through the center of the refrigerant outlet and extends in the left-right direction. The perspective projection view of the upper half of the inner peripheral edge of the refrigerant outlet according to the one-point perspective method in which the angle formed between the line and the horizontal line is 45 degrees is drawn on the flow velocity reducing member. The capacitor according to any one of the above. The capacitor according to claim 7, wherein the mesh of the flow velocity reducing member has an opening of 160 μm or less and an aperture ratio of 50% or less. The capacitor according to any one of claims 1 to 8, wherein a desiccant is disposed in the liquid reservoir so as not to interfere with the guide.

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