JP2013029257A - Condenser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a condenser having improved supercooling performance at its supercooling part.SOLUTION: One end of the condenser 1 is provided with: a first header tank 3 to which the heat exchange tube 2A of heat exchange paths P1 and P2, except for a heat exchange path P3, located at the refrigerant flow direction downstream edge of a condensation part 1A is connected; a second header tank 4 to which the heat exchange tube 2B of a heat exchange path P3 located at the refrigerant flow direction downstream edge of the condensation part 1A is connected; and a third header tank 5 to which the heat exchange tube 2C of the heat exchange path P4 of a supercooling part 1B is connected. The second header tank 4 is arranged outside of the right-hand side and left-hand side of the first and the third header tanks 3, 5. The upper end of the second header tank 4 is located above the lower end of the first header tank 3, and the lower end thereof is located below the upper end of the third header tank 5. The second header tank 4 has a function to separate vapor and liquid and to store the liquid. The second header tank 4 and the third header tank 5 are connected through a communication part 19.

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 upper and lower sides and the left and right sides refer to the upper and lower sides and the left and right sides of FIGS.

  For example, as a condenser of a car air conditioner, a condensing unit and a supercooling unit are provided so that the former is located on the upper side, and the length direction is directed in the left-right direction, and they are arranged in parallel at intervals in the vertical direction. A plurality of heat exchange pipes, fins arranged between adjacent heat exchange pipes, and a header tank which is arranged with the length direction directed vertically and to which both left and right ends of the heat exchange pipes are connected A heat exchange path comprising a plurality of heat exchange tubes arranged in a row in the vertical direction is provided one by one in the condensing unit and the subcooling unit, and the condensing unit The heat exchange path provided in is a refrigerant condensation path that condenses the refrigerant, and the heat exchange path provided in the supercooling part is a refrigerant supercooling path that supercools the refrigerant, and each of the left and right ends is Heat exchange pipe One header tank to be connected is provided, and the inside of both header tanks is divided into an upper header portion and a lower header portion by a partition plate provided at a height position between the refrigerant condensation path and the refrigerant subcooling path, respectively. The left and right ends of the total heat exchange pipe of the refrigerant condensing path are connected to the upper header parts of both header tanks, and the right and left ends of the total heat exchange pipe of the refrigerant subcooling path are connected to the lower header parts of both header tanks. Connected, a refrigerant inlet is provided in the upper header portion of one header tank, a refrigerant outlet is provided in the lower header portion, and a receiver that separates gas and liquid and collects the liquid is joined to the other header tank The upper and lower header portions of the other header tank and the receiver are communicated with each other, and the refrigerant flows into the receiver from the upper header portion of the other header tank. In the vessel After the liquid has been separated, it is known capacitors liquid phase predominant mixed refrigerant is adapted to flow into the lower header tank of the other header tank (see Patent Document 1).

  However, in the capacitor described in Patent Document 1, since the refrigerant flowing into the liquid receiver from the upper header portion of the other header tank is a gas-liquid mixed phase, bubbles violently flow into the liquid receiver. Therefore, if a buffer such as a desiccant is not properly disposed in the receiver, the gas-liquid separation effect in the receiver is reduced, and air bubbles flow into the lower header section and the supercooling section. There is also a risk of flowing into the heat exchange pipe. Therefore, there exists a problem that the supercooling performance in a supercooling part becomes inadequate.

JP 2001-33121 A

  An object of the present invention is to provide a capacitor that solves the above problems and has improved supercooling performance in a supercooling section.

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

1) A plurality of heat exchange tubes in which the condensing unit and the supercooling unit are provided so that the former is located on the upper side, and the length direction is directed in the left-right direction and the vertical direction is spaced apart in parallel And a header tank that is arranged with the length direction directed in the vertical direction and to which both left and right ends of the heat exchange pipe are connected, and is composed of a plurality of heat exchange pipes arranged continuously in the vertical direction in the condensing part All refrigerants having two or more heat exchange paths, at least one heat exchange path composed of a plurality of heat exchange pipes arranged continuously in the vertical direction in the supercooling section, and flowing through the heat exchange pipe of the condensing section Is a condenser adapted to flow into the heat exchange pipe of the supercooling section,
The first header tank to which the heat exchange pipe of the heat exchange path excluding the heat exchange path at the downstream end in the refrigerant flow direction of the condensing part is connected to either the left or right end side, and the heat at the downstream end of the condensing part in the refrigerant flow direction A second header tank to which the heat exchange pipe of the exchange path is connected and a third header tank to which the heat exchange pipe of the total heat exchange path of the supercooling unit is connected are provided, and the second header tank is the first header. The tank and the third header tank are arranged on the outer side in the left-right direction, the upper end of the second header tank is located above the lower end of the first header tank, and the lower end is also lower than the upper end of the third header tank. The capacitor | condenser which has a function which the 2nd header tank isolate | separates gas-liquid and accumulates, and is made to communicate with the 2nd header tank and the 3rd header tank via a communication part.

  2) The capacitor as described in 1) above, wherein a portion of the second header tank located below the upper end of the third header tank and the third header tank are communicated with each other via a communication portion.

  3) The first header tank and the third header tank are provided at the same position in the ventilation direction and the left-right direction, and the first header tank is located immediately above the third header tank 1) or 2 ) Capacitor described.

  4) The condenser according to any one of 1) to 3), wherein in the condensing unit, the refrigerant flows from the heat exchange path at the upper end toward the heat exchange path at the lower end.

  According to the above capacitors 1) to 3), the first header tank, to which the heat exchange pipe of the heat exchange path excluding the heat exchange path at the downstream end in the refrigerant flow direction of the condensing part is connected to one of the left and right ends. And a second header tank to which the heat exchange pipe of the heat exchange path at the downstream end in the refrigerant flow direction of the condensing part is connected, and a third header tank to which the heat exchange pipe of the total heat exchange path of the supercooling part is connected. Provided, the second header tank is disposed on the outer side in the left-right direction than the first header tank and the third header tank, and the upper end of the second header tank is located above the lower end of the first header tank, Similarly, the lower end is located below the upper end of the third header tank, the second header tank has a function of separating gas and liquid and storing the liquid, and the second header tank and the third header tank are connected to each other. Because it is made to communicate through Even if the refrigerant flowing into the second header tank from the heat exchange path at the downstream end in the refrigerant flow direction of the condensing part is a gas-liquid mixed phase, the bubbles are It flows into the second header tank through the heat exchange pipe on the upper side of the heat exchange path at the downstream end in the refrigerant flow direction. Therefore, the inflow speed of the refrigerant into the second header tank is lowered and gradually flows, and the gas-liquid separation effect in the second header tank is improved. As a result, bubbles are prevented from flowing into the heat exchange pipe of the heat exchange path of the supercooling section.

It is a front view which shows concretely the whole structure of the capacitor | condenser by this invention. FIG. 2 is a front view schematically showing the capacitor of FIG. 1. It is an AA line expanded sectional view of FIG. It is a disassembled perspective view which shows the principal part of the capacitor | condenser of FIG.

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

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

  FIG. 1 specifically shows the overall configuration of the capacitor according to the present invention, FIG. 2 schematically shows the capacitor of FIG. 1, and FIGS. 3 and 4 show the configuration of the main part of the capacitor of FIG. 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. (2A) (2B) (2C) with a plurality of aluminum flat heat exchanger tubes (2A) (2B) (2C) arranged at intervals in the vertical direction with the length direction facing in the horizontal direction Four aluminum header tanks (3), (4), (5), which are arranged with the direction facing up and down and the heat exchange pipes (2A) (2B) (2C) are connected to both left and right ends by brazing 6) and the aluminum corrugated fin (7A) brazed to the heat exchange tubes (2A) (2C) between the adjacent heat exchange tubes (2A) (2B) (2C) and outside the upper and lower ends ) (7B) (7C) and aluminum side plates (8A) placed outside the corrugated fins (7A) (7C) at the upper and lower ends and brazed to the corrugated fins (7A) (7C) ).

  In the condenser (1A) of the condenser (1), there are two or more heat exchange pipes (2A) (2B) arranged in a row vertically, and here three heat exchange paths (P1) (P2) ( P3) is provided, and the supercooling section (1B) is provided with at least one, in this case, one heat exchange path (P4) consisting of a plurality of heat exchange tubes (2C) arranged in a row vertically. The heat exchange path (P1) (P2) (P3) provided in the condensing part (1A) serves as a refrigerant condensation path, and the heat exchange path (P4) provided in the supercooling part (1B) serves as a refrigerant subcooling path. It has become. All the heat exchange tubes (2A) (2B) (2C) constituting each heat exchange path (P1) (P2) (P3) (P4) have the same refrigerant flow direction and two adjacent heat The refrigerant flow directions of the heat exchange tubes (2A), (2B), and (2C) in the exchange path are different. Here, the heat exchange paths (P1), (P2), and (P3) of the condensing part (1A) are called first to third heat exchange paths, and the heat exchange path (P4) of the supercooling part (1B) is fourth heat. This is called an exchange path.

  On the left end side of the condenser (1), the first and second heat exchange paths (P1) and (P2) provided in the condenser (1A) (heat exchange paths excluding the heat exchange path at the downstream end in the refrigerant flow direction) The first header tank (3) to which the left end of the total heat exchange pipe (2A) is connected by brazing, and the third heat exchange path (P3) (downstream end in the refrigerant flow direction) provided in the condenser (1A) The second header tank (4) with the left end of the total heat exchange pipe (2B) of the heat exchange path) connected by brazing and the fourth heat exchange path (P4) provided in the supercooling section (1B) A third header tank (5) to which the left end of the heat exchange pipe (2C) is connected by brazing is provided separately.

  The cross-sectional shapes of the first header tank (3) and the third header tank (5) are the same size. The first header tank (3) and the third header tank (5) are provided at the same position in the ventilation direction and the left-right direction, and the first header tank (3) is the same as the third header tank (5). Located directly above.

  The second header tank (4) is arranged on the outer side in the left-right direction with respect to the first header tank (3) and the third header tank (5), and the upper end of the second header tank (4) is the first header tank (3). The lower end of the third header tank (5) is also positioned below the upper end of the third header tank (5). A third heat exchange path (P3) is provided in a portion of the second header tank (4) located below the lower end of the first header tank (3) and above the upper end of the third header tank (5). The constituent heat exchange tubes (2B) are connected by brazing. The internal volume of the second header tank (4) is such that the liquid-phase mixed phase refrigerant out of the gas-liquid mixed phase refrigerant flowing into the second header tank (4) accumulates in the lower part of the second header tank (4) due to gravity. The gas phase component of the gas-liquid mixed phase refrigerant accumulates in the upper part of the second header tank (4) due to gravity, and thereby has an internal volume capable of separating the gas and liquid. Therefore, the second header tank (4) functions as a liquid receiving part that separates gas and liquid using gravity and stores the liquid.

  Here, the heat exchange pipe (2A) connected to the first header tank (3) is called the first heat exchange pipe, and the heat exchange pipe (2B) connected to the second header tank (4) is the second heat. The heat exchange pipe (2C) connected to the third header tank (5) is called a third heat exchange pipe. Also, between adjacent first heat exchange tubes (2A), between the first heat exchange tube (2A) at the upper end and the upper side plate (8), and between the first heat exchange tube (2A) at the lower end and the upper end The corrugated fin (7A) arranged between the second heat exchange pipe (2B) is called a first corrugated fin, and the corrugated fin (7B) arranged between the adjacent second heat exchange pipes (2B). ) Is called the second corrugated fin, between the adjacent third heat exchange tubes (2C), between the third heat exchange tube (2C) at the upper end and the second heat exchange tube (2B) at the lower end, and at the lower end The corrugated fin (7C) disposed between the third heat exchange pipe (2C) and the lower side plate (8) is referred to as a third corrugated fin.

  On the right end side of the condenser (1) is the right end of all heat exchange pipes (2A) (2B) (2C) that make up the first to fourth heat exchange paths (P1) (P2) (P3) (P4) The 4th header tank (6) to which a part is connected is arrange | positioned. The cross-sectional shape of the fourth header tank (6) is the same as that of the first and third header tanks (3) and (5).

  The fourth header tank (6) has a height position between the first heat exchange path (P1) and the second heat exchange path (P2), and the third heat exchange path (P3) and the fourth heat exchange path. It is divided into an upper header part (12), an intermediate header part (13), and a lower header part (14) by an aluminum partition plate (9) (11) provided at a height position between (P4). ing. A refrigerant inlet (15) is formed in the upper header portion (12) of the fourth header tank (6), and a refrigerant outlet (16) is formed in the lower header portion (14). In addition, a refrigerant inlet member (17) that communicates with the refrigerant inlet (15) and a refrigerant outlet member (18) that communicates with the refrigerant outlet (16) are joined to the fourth header tank (6).

  A portion of the second header tank (4) positioned below the upper end of the third header tank (5) is communicated with the third header tank (5) via the communication portion (19). As shown in FIGS. 3 and 4, the communication part (19) is formed in the through hole (21) formed in the peripheral wall of the second header tank (4) and in the peripheral wall of the third header tank (5). It has a through hole (22) and a flow path (24) through which the through holes (21) and (22) of both header tanks (4) and (5) pass, and is brazed to both header tanks (4) and (5). And an aluminum cylindrical communication member (23). An annular bead (25) positioned between the header tanks (4) and (5) is formed at the center in the length direction of the communication member (23), and the left side of the annular bead (25) in the communication member (23). The portion is provided with a first insertion portion (26) inserted into the through hole (21) of the second header tank (4), and on the right side portion, the through hole (22) of the third header tank (5) is provided. ) Is inserted into the second insertion portion (27).

  The capacitor (1) is manufactured by brazing all parts together.

  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 (17) and the refrigerant inlet (15), and the upper header portion of the fourth header tank (6). (12) flows into the first heat exchange pipe (2A) of the first heat exchange path (P1) and is condensed while flowing leftward and flows into the first header tank (3). The refrigerant flowing into the first header tank (3) is condensed while flowing to the right in the first heat exchange pipe (2A) of the second heat exchange path (P2), and the fourth header tank (6). Into the intermediate header portion (13), and further flows leftward in the second heat exchange pipe (2B) of the third heat exchange path (P3) and into the second header tank (4).

  The refrigerant flowing into the second header tank (4) is a gas-liquid mixed phase refrigerant. Among the gas-liquid mixed phase refrigerant, the liquid phase main mixed refrigerant is accumulated in the lower part of the second header tank (4) due to gravity, and is connected to the communication section. It enters the third header tank (5) through the flow path (24) of the communication member (23) constituting (19).

  The liquid-phase main mixed refrigerant entering the third header tank (5) is supercooled while flowing rightward in the third heat exchange pipe (2C) of the fourth heat exchange path (P4), It enters the lower header section (14) of the 4-header tank (6), flows out through the refrigerant outlet (16) and the refrigerant outlet member (18), and is sent to the evaporator through the expansion valve.

  On the other hand, the gas phase component of the gas-liquid mixed phase refrigerant that has flowed into the second header tank (4) accumulates in the upper part of the second header tank (4).

  In the capacitor (1) shown in FIGS. 1 to 4, a desiccant and a filter may be disposed in the second header tank (4).

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

(1): Capacitor
(1A): Condensing part
(1B): Supercooling section
(2A) (2B) (2C): Heat exchange tube
(3): First header tank
(4): Second header tank
(5): Third header tank
(6): Fourth header tank
(19): Communication part
(P1): First heat exchange path
(P2): Second heat exchange path
(P3): Third heat exchange path
(P4): Fourth heat exchange path

Claims (4)

A plurality of heat exchange tubes arranged in parallel with an interval in the vertical direction, with the condensing unit and the supercooling unit provided so that the former is located on the upper side, with the length direction facing the left and right direction; 2 or more comprising a plurality of heat exchange tubes that are arranged in a vertical direction and have a header tank to which both left and right ends of the heat exchange tube are connected, and that are continuously arranged vertically in the condensing unit A heat exchange path is provided, and at least one heat exchange path consisting of a plurality of heat exchange pipes arranged continuously in the vertical direction is provided in the supercooling section so that all the refrigerant flowing through the heat exchange pipe of the condensing section is superfluous. A condenser adapted to flow into the heat exchange pipe of the cooling section,
The first header tank to which the heat exchange pipe of the heat exchange path excluding the heat exchange path at the downstream end in the refrigerant flow direction of the condensing part is connected to either the left or right end side, and the heat at the downstream end of the condensing part in the refrigerant flow direction A second header tank to which the heat exchange pipe of the exchange path is connected and a third header tank to which the heat exchange pipe of the total heat exchange path of the supercooling unit is connected are provided, and the second header tank is the first header. The tank and the third header tank are arranged on the outer side in the left-right direction, the upper end of the second header tank is located above the lower end of the first header tank, and the lower end is also lower than the upper end of the third header tank. The capacitor | condenser which has a function which the 2nd header tank isolate | separates gas-liquid and accumulates, and is made to communicate with the 2nd header tank and the 3rd header tank via a communication part. The capacitor | condenser of Claim 1 with which the part located below the upper end of the 3rd header tank in a 2nd header tank and the 3rd header tank are connected via the communication part. The first header tank and the third header tank are provided at the same position in the ventilation direction and the left-right direction, and the first header tank is located immediately above the third header tank. Capacitor. The condenser according to any one of claims 1 to 3, wherein in the condensing unit, the refrigerant flows from the upper end heat exchange path toward the lower end heat exchange path.

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