JP2015148404A - Evaporator with cold storage function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an evaporator with a cold storage function which can suppress increase in weight.SOLUTION: An evaporator with a cold storage function includes a plurality of refrigerant circulation pipes 12 arranged in parallel shape at intervals with each other in a state where the longer direction faces the vertical direction and the width direction faces the ventilation direction. Out of all gaps 14A, 14B formed between the adjacent refrigerant circulation pipes 12, at one part of the plurality of gaps 14A, condensate water storage members 15 are arranged, and heat transfer fins 16 are arranged at the remaining gaps 14B. At the gaps 14B on both sides of the gaps 14A in which the condensate water storage members 15 are arranged, heat transfer fins 16 are located. On both left and right side surfaces of the condensate water storage members 15, two rows of ventilation passage rows 17A, 18A comprising a plurality of ventilation passages 17, 18 formed at intervals in the vertical direction are provided. At a leeward side end part of the ventilation passage 17 of the windward side ventilation passage row 17A and a windward side end part of the ventilation passage 18 of the leeward side ventilation passage row 18A are deviated in the vertical direction.

Description

  The present invention relates to an evaporator with a cold storage function.

  In this specification and the claims, the top and bottom of FIGS. 1 and 3 are the top and bottom.

  In recent years, automobiles have been proposed that automatically stop the engine when the vehicle stops, such as when waiting for a signal, for the purpose of environmental protection or improvement in automobile fuel efficiency.

  However, in a normal car air conditioner, when the engine is stopped, the compressor using the engine as a driving source stops, so that there is a problem that the refrigerant is not supplied to the evaporator and the cooling capacity is rapidly reduced.

  Therefore, in order to solve such problems, the evaporator is provided with a cold storage function, and when the engine stops and the compressor stops, the cold stored in the evaporator is discharged to cool the vehicle interior. Is considered.

  As an evaporator with this kind of cold storage function, it has a plurality of flat refrigerant flow pipes arranged in parallel and spaced apart from each other in a state in which the longitudinal direction is directed in the vertical direction and the width direction is directed in the ventilation direction. The regenerator material container in which the regenerator material is sealed is disposed in a plurality of gaps among all the gaps formed between adjacent refrigerant flow pipes, and heat transfer fins are disposed in the remaining gaps. An evaporator with a cold storage function has been proposed in which heat transfer fins are located in at least one of the gaps on both sides of the gap where the cold storage material container is disposed (see Patent Document 1).

  According to the evaporator with a cold storage function described in Patent Document 1, during normal cooling when the compressor is operating, the cold heat of the refrigerant flowing in the refrigerant flow pipe is transmitted to the cold storage material in the cold storage material container to cool the cold storage material. Can be stored. On the other hand, when the compressor is stopped, the cold heat stored in the regenerator material in the regenerator material container is transmitted to the refrigerant flow pipe, and the gap between both sides of the gap where the regenerator material container is disposed through the refrigerant flow pipe. It is transmitted to the arranged heat transfer fins, and is cooled by the air flowing through the gap from the heat transfer fins.

  However, according to the evaporator with a cool storage function described in Patent Document 1, since the cool storage material container in which the cool storage material is enclosed is provided, there is a problem that the overall weight increases.

JP 2013-61137 A

  The objective of this invention is providing the evaporator with a cool storage function which can solve the said problem and can suppress the increase in a weight.

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

  1) It has a plurality of flat refrigerant flow pipes arranged in parallel and spaced apart from each other in a state where the longitudinal direction is directed in the vertical direction and the width direction is directed in the ventilation direction. Condensate storage members are arranged in some of the gaps formed between the two, and heat transfer fins are arranged in the remaining gaps, and both sides of the gap where the condensed water storage members are arranged. The heat transfer fin is located in at least one of the gaps, and includes a plurality of ventilation paths formed on both sides in the thickness direction of the refrigerant flow pipe in the condensed water storage member and spaced in the vertical direction. A plurality of rows of ventilation paths are provided at intervals in the ventilation direction, and the leeward side end of the ventilation path of the windward ventilation path of two ventilation paths adjacent to each other in the ventilation direction, and the same ventilation lower ventilation path The upwind end of the ventilation path of Evaporator with a cool storage function that is.

  2) The evaporator with a regenerative function according to 1) above, wherein the ventilation path of at least one ventilation path line out of the ventilation path line except the ventilation path line located on the most windward side is inclined upward toward the leeward side. .

  3) A plurality of pipe assemblies composed of two flat refrigerant flow pipes arranged at intervals in the ventilation direction are arranged at intervals in the thickness direction of the refrigerant flow pipe, and there are gaps between adjacent pipe sets. Two condensate storage members are formed and arranged in the ventilation direction. The ventilation path of the windward ventilation path is horizontal, and the ventilation path of the leeward ventilation path is directed toward the leeward side. Inclined upward, and the leeward end of the ventilation path of the leeward ventilation path row and the leeward end of the ventilation path of the leeward ventilation path row are within the range in the width direction of the leeward refrigerant circulation pipe, respectively. The evaporator with a cool storage function as described in 2) above.

  4) The condensate storage member is formed by joining two metal plates, the ventilation path is provided on both metal plates and protrudes toward the refrigerant flow pipe, and the protruding end is bonded to the refrigerant flow pipe. Furthermore, the evaporator with a cool storage function in any one of said 1) -3) formed between the two convex parts for ventilation paths.

  5) Between the two airflow passage convex portions forming one air passage of the condensed water storage member, each metal plate is provided with a joint convex portion projecting to the other metal plate side. The evaporator with a cold storage function according to 4) above, wherein the joining convex portions are brazed.

  6) The shortest distance between the protruding end of the convex part for the ventilation path in one metal plate of the condensed water storage member and the protruding end of the convex part for the ventilation path in the other metal plate is the refrigerant flow in the heat transfer fin. The evaporator with a cold storage function according to 5) above, which is equal to a fin height which is a dimension in the thickness direction of the pipe.

  According to the evaporator with a cold storage function of 1) to 6) above, since the wind is difficult to pass through the gap where the condensed water storage member is disposed, the condensed water generated on the surface of the condensed water storage member during the operation of the compressor Is held in the condensed water storage member for a relatively long time. When the engine is stopped and the compressor is stopped, if the condensed water stored in the condensed water storage member is cold as sensible heat or if the condensed water is frozen in the condensed water storage member The cold heat as the latent heat of the frozen condensed water and the cold heat as the sensible heat of the condensed water after melting are allowed to cool to the air flowing through the gap where the condensed water storage member is disposed. Furthermore, when the condensed water is frozen as the sensible heat of the condensed water described above, or when the condensed water is frozen in the condensed water storage member, the sensible heat as the latent heat of the frozen condensed water and the sensible heat of the condensed water after melting Is transmitted to the heat transfer fins located in at least one of the gaps on both sides of the gap where the condensed water storage member is disposed through the refrigerant flow pipes on both sides of the condensed water storage member. It cools to the air which flows through the clearance gap in which the heat-transfer fin is arrange | positioned. Therefore, it is possible to extend the cooling time, and it is possible to suppress a decrease in cooling capacity for a longer time. As a result, it is possible to reduce the weight as compared with the evaporator with a cool storage function described in Patent Document 1 without requiring a cool storage material container containing a latent heat storage material.

  According to the evaporator with a cold storage function of 2) and 3) above, since the wind is more difficult to pass through the gap where the condensed water storage member is disposed, the condensed water generated on the surface of the condensed water storage member during the operation of the compressor Becomes difficult to be discharged out of the heat exchange core. Therefore, it is possible to effectively extend the time held by the condensed water storage member of the condensed water.

  According to the evaporator with the cold storage function of 3) above, since the ventilation path of the leeward side ventilation path row is inclined upward toward the leeward side, the condensed water generated on the surface of the ventilation path of the leeward side ventilation path row Scattering can be suppressed.

  According to the evaporator with a cold storage function of 4) above, a condensed water storage member having a ventilation path can be made relatively easily.

  According to the evaporator with a cold storage function of 5) above, it is possible to increase the area of the portion where condensed water is generated in the condensed water storage member, and to effectively extend the cooling time when the compressor is stopped. it can.

  According to the evaporator with a cold storage function of 6) above, the thickness in the thickness direction of the refrigerant flow pipe in the gap formed between adjacent refrigerant flow pipes can be made equal in all the gaps. The manufacturing process becomes relatively simple.

It is the perspective view which abbreviate | omitted one part which shows the whole structure of the evaporator with a cool storage function of this invention. It is an AA line expanded sectional view of FIG. It is a left view which shows the condensed water storage member used for the evaporator with a cool storage function of FIG. It is a partial expansion perspective view which shows the condensed water storage member used for the evaporator with a cool storage function of FIG. It is the BB sectional view taken on the line of FIG. It is CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG.

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

  In the following description, the downstream side in the ventilation direction (the direction indicated by the arrow X in FIGS. 1 to 3) is referred to as the front side, and the opposite side is referred to as the rear side. ) Is left and right.

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

  FIG. 1 shows the overall structure of an evaporator with a cold storage function according to the present invention, and FIGS.

  In FIG. 1, an evaporator with a cold storage function (1) is composed of an aluminum upper header tank (2) and an aluminum lower header tank (3) arranged at intervals in the vertical direction with the longitudinal direction directed in the horizontal direction. And a heat exchange core part (4) provided between the header tanks (2) and (3).

  The upper header tank (2) is integrated with the leeward upper header part (5) located on the front side (downstream side of the ventilation direction) and the rear side (upstream side of the ventilation direction) and integrated with the leeward side upper header part (5) And a windward upper header section (6). A refrigerant inlet (7) is provided at the left end of the leeward upper header portion (5), and a refrigerant outlet (8) is provided at the left end of the leeward upper header portion (6). The lower header tank (3) includes a leeward lower header portion (9) located on the front side, and an upwind lower header portion (11) located on the rear side and integrated with the leeward lower header portion (9). It has.

  As shown in FIGS. 1 and 2, the heat exchange core (4) has a flat refrigerant made of a plurality of extruded aluminum shapes whose longitudinal direction faces the vertical direction and whose width direction faces the ventilation direction (front-rear direction). The flow pipes (12) are arranged in parallel in the left-right direction (thickness direction of the refrigerant flow pipe (12)). Here, a plurality of sets (13) consisting of two refrigerant flow pipes (12) arranged at intervals in the front-rear direction are arranged at intervals in the left-right direction, and the front and rear refrigerant flow pipes (12) A gap (14A) (14B) is formed between adjacent members of the set (13). The upper end of the leeward refrigerant circulation pipe (12) is connected to the leeward upper header (5), and the lower end is connected to the leeward lower header (9). The upper end portion of the windward side refrigerant circulation pipe (12) is connected to the windward upper header portion (6), and the lower end portion thereof is connected to the windward lower header portion (11). The refrigerant passes through the refrigerant inlet (7) and enters the leeward upper header portion (5) of the evaporator (1), passes through the entire refrigerant flow pipe (12), and the refrigerant outlet ( It is designed to flow out of 8).

  Among the total gaps (14A) (14B) in the heat exchange core part (4), in some gaps (14A) and not adjacent (14A), the aluminum condensed water storage member (15) is The remaining gap (14B) is brazed to both the front and rear refrigerant flow pipes (12) of the left and right pipe assemblies (13) that are arranged so as to straddle the front and rear refrigerant flow pipes (12) to form a gap (14A). The heat transfer fins (16) made of aluminum are disposed so as to straddle the front and rear refrigerant flow pipes (12) to form both the front and rear refrigerant flow pipes (12) of the left and right pipe assemblies (13) forming a gap (14B). ) Is brazed. Here, corrugated heat transfer fins (16) are arranged in the gaps (14B) adjacent to the left and right sides of the gap (14A) in which the condensed water storage member (15) is arranged, and are adjacent in the left-right direction. Two heat transfer fins (16) are located between the matching condensate storage members (15). Also, heat transfer fins (16) made of an aluminum brazing sheet having brazing filler metal layers on both sides are also arranged outside the pipe assembly (13) of the refrigerant flow pipes (12) at both left and right ends, and both the front and rear refrigerant flow pipes (12 The aluminum side plate (26) is disposed outside the heat transfer fins (16) at the left and right ends, and is brazed to the heat transfer fins (16).

  As shown in FIGS. 3 to 7, the left and right side surfaces of the condensate water storage member (15) (both side surfaces of the refrigerant flow pipe (12) in the thickness direction of the condensate water storage member (15)) are spaced vertically. A plurality of ventilation passages (17A) (18A) composed of a plurality of ventilation passages (17) and (18) formed in the above are provided in a plurality of rows, two in this case at intervals in the ventilation direction. Of the two adjacent ventilation path rows (17A) and (18A), the leeward side end of the ventilation path (17) of the windward ventilation path row (17A) and the ventilation path (18A) of the windward side ventilation path row (18A) ) In the vertical direction. The ventilation path (17) of the windward side ventilation path row (17A) of the condensed water storage member (15) is horizontal, and the ventilation path (18) of the leeward side ventilation path row (18A) is directed upward toward the leeward side. The pipes are inclined, and the leeward end of the ventilation path (17) of the windward ventilation path row (17A) and the windward end of the ventilation path (18) of the leeward ventilation path row (18A) are respectively connected to the pipes. It is located within the range in the width direction of the leeward refrigerant circulation pipe (12) of the group (13). The windward end of the ventilation path (17) of the windward ventilation path row (17A) opens to the windward side of the heat exchange core (4), and the ventilation path (18) of the windward ventilation path row (18A). The end of the leeward side is open to the leeward side of the heat exchange core (4). In FIG. 3, one ventilation path (17) of the windward side ventilation path row (17A) and one ventilation path (18) of the leeward side ventilation path row (18A) are respectively shown by shading. .

  The condensed water storage member (15) is formed by laminating and brazing two metal plates (19) and (21) made of an aluminum brazing sheet having a brazing filler metal layer on both sides. ) (18) is provided in a bulging shape on both metal plates (19) and (21) and protrudes toward the refrigerant flow pipe (12), and a flat protruding end is brazed to the refrigerant flow pipe (12). It is formed between the two ventilation path convex portions (22) and (23). Note that a space is formed between the metal plate (19) (21) between the ventilation path protrusions (22) with one end opened to the windward side and the other end closed. Between the portions (23), a space is formed in which one end opens to the leeward side and the other end is closed. In addition, the metal plates (19) and (21) are disposed between the two ventilation path convex portions (22) and (23) forming one ventilation path (17) and (18) of the condensed water storage member (15). The projections (24) and (25) for joining projecting toward the other metal plates (21) and (19) are provided, and the projections for joining (24) and (25) of both metal plates (19) and (21) are provided. It is brazed. The protruding end of the vent path convex portion (22) (23) in one metal plate (19) of the condensed water storage member (15) and the vent path convex portion (22) in the other metal plate (21) ( The shortest distance between the protruding end of 23) is equal to the fin height which is the dimension in the thickness direction (left-right direction) of the refrigerant flow pipe (12) in the heat transfer fin (16).

  The evaporator with a cold storage function (1) described above includes a compressor that uses a vehicle engine as a drive source, a condenser that cools the refrigerant discharged from the compressor (refrigerant cooler), and an expansion valve that depressurizes the refrigerant that has passed through the condenser ( A refrigeration cycle is configured together with a decompressor, and is mounted as a car air conditioner on a vehicle, such as an automobile, that temporarily stops an engine that is a drive source of a compressor when the vehicle is stopped. When the compressor is operating, the low-pressure gas-liquid mixed-phase two-phase refrigerant compressed by the compressor and passed through the condenser and the expansion valve passes through the refrigerant inlet (7) and has an evaporator with a cold storage function ( It enters into the leeward upper header part (5) of 1) and flows out from the refrigerant outlet (8) of the leeward upper header part (6) through the entire refrigerant flow pipe (12). While the refrigerant flows through the refrigerant flow pipe (12), heat exchange is performed with the air passing through the gap (14B), and the refrigerant flows out as a gas phase.

  During the operation of the compressor, the airflow path convex portion (cooled by the refrigerant flowing in the refrigerant flow pipe (12) and brazed to the refrigerant flow pipe (12) on the left and right side surfaces of the condensed water storage member (15) ( 22) Condensed water is generated in the portion excluding the protruding end of (23). And the ventilation path row (17A) (18A) consisting of a plurality of ventilation paths (17) (18) formed on the left and right side surfaces of the condensed water storage member (15) at intervals in the vertical direction is the ventilation direction. Two rows are provided at intervals, and the leeward side end of the ventilation channel (17) of the windward ventilation channel row (17A) of the two ventilation channel rows (17A) (18A) adjacent to each other in the ventilation direction And the upwind side end of the ventilation path (18) of the same downwind ventilation path row (18A), the ventilation of the upwind ventilation path row (17A) of the condensed water storage member (15) The passage (17) is horizontal, the ventilation passage (18) of the leeward ventilation passage row (18A) is inclined upward toward the leeward side, and the ventilation passage of the windward ventilation passage row (17A). The leeward side end of (17) and the windward side end of the ventilation path (18) of the leeward side ventilation path row (18A) are respectively in the width direction of the leeward side refrigerant circulation pipe (12) of each pipe assembly (13) The condensate storage member (15) is In the formed gap (14A), it is difficult for the wind to pass through, so the condensed water generated in the above-mentioned portion of the condensed water storage member (15) during the operation of the compressor is relatively long in the condensed water storage member (15). Will be held for hours. As a result, when the compressor is turned off, if the condensed water stored in the condensed water storage member (15) is cold as sensible heat or if the condensed water freezes on the surface of the condensed water storage member (15), The cold heat as the latent heat of the heat and the cold heat as the sensible heat of the condensed water after melting pass through the refrigerant flow pipe (12), and the condensed water storage member (15) is disposed via the heat transfer fin (16). It is transmitted to the air passing through the gap (14B) adjacent to the gap (14A). Therefore, it is possible to extend the cooling time for cooling to the air flowing through the gap (14B), and even if the temperature of the wind passing through the evaporator (1) with a cold storage function rises, the wind is cooled. As a result, a rapid decrease in cooling capacity is suppressed for a relatively long time.

  The evaporator with a cool storage function according to the present invention is suitably used for an evaporator with a cool storage function of a refrigeration cycle that constitutes a car air conditioner of a vehicle that temporarily stops an engine that is a drive source of a compressor when the vehicle is stopped.

(1): Evaporator with cool storage function
(12): Refrigerant distribution pipe
(13): Tube assembly
(14A) (14B): Gap
(15): Condensate storage member
(16): Heat transfer fin
(17) (18): Ventilation path
(17A): Upwind ventilation line
(18A): Downstream side
(19) (21): Metal plate
(22) (23): Convex part for ventilation path
(24) (25): Convex protrusion

Claims (6)

It has a plurality of flat refrigerant flow pipes arranged in parallel and spaced apart from each other in a state where the longitudinal direction is directed vertically and the width direction is directed to the ventilation direction. The condensate storage members are arranged in some of the gaps formed in the gap, and the heat transfer fins are arranged in the remaining gaps, and the gaps on both sides of the gap where the condensate storage members are arranged. The heat transfer fin is located in at least one of the gaps, and the air flow path is composed of a plurality of air flow paths formed at intervals in the vertical direction on both side surfaces in the thickness direction of the refrigerant flow pipe in the condensed water storage member. A plurality of rows are provided at intervals in the ventilation direction, and among the two ventilation channel rows adjacent to each other in the ventilation direction, the leeward side end of the ventilation channel of the windward ventilation channel row and the ventilation of the same ventilation lower side ventilation channel row The windward end of the road is not in the vertical direction And it has an evaporator with a cool storage function. The evaporator with a cool storage function according to claim 1, wherein a ventilation path of at least one of the ventilation path lines excluding the ventilation path line positioned on the most windward side is inclined upward toward the leeward side. A plurality of pipe assemblies composed of two flat refrigerant flow pipes arranged at intervals in the ventilation direction are arranged at intervals in the thickness direction of the refrigerant flow pipe, and a gap is formed between adjacent pipe sets. The condensate storage member is provided with two ventilation path rows arranged in the ventilation direction, the ventilation path of the windward ventilation path row is horizontal, and the ventilation path of the leeward ventilation path row is directed upward toward the leeward side. It is inclined, and the leeward side end of the ventilation path of the leeward side ventilation path row and the windward side end of the ventilation path of the leeward side ventilation path row are respectively located within the range in the width direction of the leeward side refrigerant circulation pipe. The evaporator with a cool storage function according to claim 2. The condensate storage member is formed by joining two metal plates, the ventilation path is provided on both metal plates and protrudes toward the refrigerant flow pipe side, and the protruding end is joined to the refrigerant flow pipe 2 The evaporator with a cool storage function according to any one of claims 1 to 3, wherein the evaporator is formed between two ventilation path convex portions. Between the two airflow passage convex portions forming one air passage of the condensed water storage member, each metal plate is provided with a joint convex portion projecting to the other metal plate side, for joining both metal plates The evaporator with a cool storage function according to claim 4, wherein the convex portions are brazed. The shortest distance between the projecting end of the convex part for the ventilation path in one metal plate of the condensed water storage member and the projecting end of the convex part for the ventilation path in the other metal plate is the refrigerant flow pipe in the heat transfer fin. The evaporator with a cool storage function according to claim 5, which is equal to a fin height which is a dimension in a thickness direction.

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