JP2015034670A - Evaporator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an evaporator capable of reducing irregularities in the temperature of air blown into a vehicle compartment from four portions when a compressor stops operating.SOLUTION: An evaporator 1 includes: a leeward tube row 3; a windward tube row 4; lower and upper leeward headers 5 and 6; and lower and upper windward headers 7 and 8. Five tube groups 13 to 17 each including a plurality of heat exchange tubes are provided in the leeward tube row 3, and three tube groups 18, 19, and 21 each including a plurality of heat exchange tubes are provided in the windward tube row 4. The first tube group 13 that is a horizontally central tube group in the leeward tube row 3 serves as a first path in which refrigerant flows first, and the eighth tube group 21 that is a horizontally central tube group in the windward tube row 4 serves as a final path in which the refrigerant flows finally. The tube groups 16 and 17 and the tube groups 18 and 19 located on right and left ends of the two tube rows 3 and 4 are identical in a refrigerant flow direction, and the two tube groups 16 and 17 and the two tube groups 18 and 19 constitute one path.

Description

  The present invention relates to an evaporator suitably used for a vehicle air conditioner that is a refrigeration cycle mounted on an automobile, for example.

  In this specification and claims, the upper and lower sides and the left and right sides of each drawing are referred to as up and down and left and right.

  As an evaporator used in a vehicle air conditioner, the present applicant has firstly made a plurality of heat exchange tubes arranged at intervals in a direction perpendicular to the ventilation direction in a state where the longitudinal direction is directed vertically. The leeward side tube row and the leeward side tube row that are arranged in the ventilation direction and the upper and lower ends of the heat exchange tubes of the leeward side tube row are arranged with the longitudinal direction facing the direction of the heat exchange tubes, and the leeward side Arrange the longitudinal direction of the leeward upper header section and leeward lower header section to which the total heat exchange tubes of the tube row are connected, and the upper and lower ends of the heat exchange tubes of the windward tube row with the heat exchange tubes aligned. And a windward upper header portion and a windward lower header portion to which the total heat exchange tubes of the windward tube row are connected, and a refrigerant inlet is provided at one end of the leeward upper header portion. In addition, a refrigerant outlet is provided at the same end as the refrigerant inlet of the upwind header section, and the first to third tube groups composed of a plurality of heat exchange tubes are provided in the refrigerant inlet side end of the leeward tube row. From the end opposite to the refrigerant outlet to the end of the refrigerant inlet side. The first tube group serves as a first path through which the refrigerant flows first, and the fifth tube group serves as a final path through which the refrigerant flows last. The first tube group, the third tube group, and the fourth tube group are arranged side by side. In the tube group, the refrigerant flows from the top to the bottom in the heat exchange tube, and in the second tube group and the fifth tube group, the refrigerant flows in the heat exchange tube from the bottom to the top, and the first tube group and the second tube group The horizontal dimensions of the fifth tube group are equal to the horizontal dimensions of the fifth tube group, and the horizontal dimensions of the third tube group and the fourth tube group are equal. The dimension in the direction is larger than ½ of the entire width, and the first section where the heat exchange tubes of the first tube group communicate with the heat exchange tubes of the second and third tube groups communicate with the leeward side upper header portion. The second section is provided, and the third section through which the heat exchange tubes of the first and second tube groups communicate and the fourth section through which the heat exchange tubes of the third tube group communicate are provided in the leeward lower header section. The fifth section through which the heat exchange tubes of the fourth and fifth tube groups communicate with the upwind lower header section, and the sixth section through which the heat exchange tubes of the fourth tube group communicate with the upwind header section, 5th Chu And a seventh section through which the heat exchange tubes of the second group communicate with each other, a portion through which the heat exchange tubes of the third tube group in the second section communicate with the sixth section, and a fourth section, An evaporator is proposed in which the portion of the fourth tube group in the fifth section that communicates with the heat exchange tube communicates with each other (see Patent Document 1).

  According to the evaporator of patent document 1, it becomes possible to suppress the increase in passage resistance in the 5th tube group which a superheat area produces. However, since a superheat region is generated in the fifth tube group, when the compressor is turned off, the temperature of the air immediately after passing through the ventilation gap between adjacent heat exchange tubes of the fifth tube group is adjacent to the other tube groups. It becomes higher than the temperature of the air immediately after passing through the ventilation gap between the matching heat exchange tubes. Even when the compressor is off, the refrigerant tends to remain in the heat exchange tubes of the third and fourth tube groups, so that the air immediately after passing through the ventilation gap between adjacent heat exchange tubes of both tube groups The temperature is relatively low. Therefore, the temperature of the air immediately after passing through the evaporator becomes uneven in the left-right direction.

  By the way, in the vehicle air conditioner, the air that has passed through the central part of the vehicle in one half of the evaporator in the width direction is blown out from the air outlet provided in the central part of the vehicle through the duct toward the driver's seat. The air that has passed through the window is blown out from the outlet provided on the window side through the duct toward the driver's seat. In addition, the air that has passed through the center of the vehicle in the other half of the evaporator in the width direction is blown out from the outlet provided in the center of the vehicle through the duct toward the passenger seat, and the air that has also passed through the window is The air is blown out from the air outlet provided on the window side through the duct toward the passenger seat. As a result, the length of the duct that guides the air that has passed through the evaporator to the outlet provided on the window side is considerably longer than the length of the duct that leads to the outlet provided in the center of the vehicle, and while passing through the duct. Since the air is warmed, the degree of warming of the air blown from the air outlet provided on the window side is higher than the degree of warming of the air blown from the air outlet provided in the center of the vehicle.

  That is, in the evaporator described in Patent Document 1, the horizontal dimension of the first tube group and the second tube group is equal to the horizontal dimension of the fifth tube group, and the third tube group and Since the horizontal dimension of the fourth tube group is equal, and the horizontal dimension of the fifth tube group is larger than ½ of the overall width, either the driver seat or the passenger seat The air that has passed through the ventilation gap between the adjacent heat exchange tubes of the fifth tube group, the first tube group, and the second tube group is blown out from the vehicle central portion and the window-side outlet, and the driver seat or the passenger seat The air that has passed through the ventilation gap between adjacent heat exchange tubes of the fifth tube group and the second tube group is blown out from the blowout port in the center of the vehicle. Together with the air passing through the air-passing clearances between the third tube group and the fourth heat exchange tubes adjacent the tube group, will be blown out from the window side of the outlet. Accordingly, the temperature of the air immediately after passing through the evaporator described in Patent Document 1 is uneven in the left-right direction, and the air blown into the passenger compartment is warmed while passing through the duct, and the vehicle center portion and the window side Due to the difference in the degree of warming when passing through a duct that sends air to the air outlet, there is a risk that the temperature of the air blown out from the four locations will vary greatly, which may impair passenger comfort is there.

JP 2011-257111 A

  An object of the present invention is to provide an evaporator that can solve the above-described problems and can reduce variations in the temperature of air blown from four locations into the vehicle interior when the compressor is stopped.

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

1) A first tube row and a second tube row which are composed of a plurality of heat exchange tubes arranged at intervals in a direction perpendicular to the ventilation direction with the longitudinal direction thereof being directed vertically, and arranged in the ventilation direction. And a first header portion that is disposed on both ends in the longitudinal direction of the heat exchange tubes of the first tube row with the longitudinal direction oriented in the direction of arrangement of the heat exchange tubes, and to which the total heat exchange tubes of the first tube row are connected, and The second header portion and the second heat exchanger tube of the second tube row are arranged at both ends in the longitudinal direction with the longitudinal direction directed in the direction in which the heat exchanger tubes are arranged, and the second heat exchanger tube of the second tube row is connected. An evaporator comprising a 3 header part and a fourth header part,
The first tube row is provided with an odd number of five or more groups of heat exchange tubes arranged in series, and the first tube row comprises a plurality of heat exchange tubes arranged in series in the second tube row. Two tube groups fewer than the tube groups in the tube row are provided, and the tube group at the center in the left-right direction of the first tube row becomes the first path through which the refrigerant flows first, and the left-right direction of the second tube row The central tube group is the final path through which the refrigerant flows last. In the first tube row, the refrigerant sequentially flows from the tube group serving as the first pass toward the left and right tube groups, and in the second tube row, the left and right ends. The refrigerant is made to flow sequentially from the tube group toward the tube group as the final pass,
An evaporator in which the refrigerant flow directions in the tube groups located at the left and right ends of the first tube row and the second tube row are the same, and one path is constituted by both the tube groups.

2) The first header portion is provided with a refrigerant inlet and a central section through which the heat exchange tube of the central tube group in the left-right direction communicates, and a tube group provided inside the left-right end tube group and the left-right end tube group in the left-right direction Left and right end sections through which the heat exchange tube communicates, the second header section has left and right end sections through which the heat exchange tubes of the left and right end tube groups communicate, and the third header section is provided with a refrigerant outlet and in the left-right direction Left and right ends where the fourth header part has a central section through which the heat exchange tube of the central tube group communicates and left and right end sections through which the heat exchange tubes of the left and right end tube groups communicate, and the fourth header part communicates with the heat exchange tubes of the left and right end tube groups A compartment and a central compartment through which the heat exchange tubes of the central tube group in the left-right direction are communicated;
The portion where the heat exchange tubes of the left and right end tube groups in the left and right end sections of the first header section communicate with the left and right end sections of the third header section are communicated, and the left and right end sections of the second header section, 4. The evaporator according to 1) above, wherein the heat exchange tubes of the left and right end tube groups in the left and right end sections of the four header portions are communicated with each other.

3) In the first tube row, the first to fifth tube groups are located at the center in the left-right direction, and the second and third tube groups are located on the left and right sides of the first tube group. Furthermore, the fourth and fifth tube groups are provided so as to be located at both left and right ends,
Sixth to eighth tube groups are provided in the second tube row so that the sixth tube group is located at the center in the left-right direction, and the seventh and eighth tube groups are located at both left and right ends,
The first header portion is provided with a refrigerant inlet, and the first section through which the heat exchange tubes of the first tube group communicate, the second section through which the heat exchange tubes of the second and fourth tube groups communicate, and the third and fifth sections. A third compartment through which the heat exchange tubes of the tube group are connected,
A fourth section through which the heat exchange tubes of the first to third tube groups communicate with the second header section, a fifth section through which the heat exchange tubes of the fourth tube group communicate, and a first section through which the heat exchange tubes of the fifth tube group communicate. There are 6 sections,
The third header portion is provided with a seventh section through which the heat exchange tube of the sixth tube group communicates, an eighth section through which the heat exchange tube of the seventh tube group communicates, a refrigerant outlet, and a heat exchange tube of the eighth tube group And a ninth section that leads to
A tenth section through which the heat exchange tube of the sixth tube group communicates with the fourth header section, an eleventh section through which the heat exchange tube of the seventh tube group communicates, and a twelfth section through which the heat exchange tube of the eighth tube group communicates. Are provided, and the tenth and eleventh sections are connected to the twelfth section,
The portion where the heat exchange tubes of the fourth tube group in the second section of the first header section communicate with the seventh section of the third header section communicates, and the fifth section in the third section of the first header section. The portion of the tube group in which the heat exchange tubes communicate with the eighth section of the third header section is communicated, and the fifth section of the second header section, the tenth section of the fourth header section, and the second header The evaporator according to 2) above, wherein the sixth section of the section and the eleventh section of the fourth header section are communicated with each other.

  4) The total lateral width of the first to third tube groups is the same as the lateral width of the eighth tube group, and the lateral widths of the fourth and sixth tube groups are the same, The evaporator according to 3) above, wherein the fifth tube group and the seventh tube group have the same lateral width.

  5) The above 1) to 4), wherein the first tube row, the first header portion and the second header portion are provided on the leeward side, and the second tube row, the third header portion and the fourth header portion are provided on the leeward side. The evaporator according to any one of the above.

  6) The evaporator according to any one of 1) to 5) above, wherein the refrigerant flows from the bottom to the top in the heat exchange tubes of the left and right end tube groups of the first and second tube rows.

  According to the evaporators 1) to 6), since the superheat region is generated in the tube group at the central portion in the left-right direction of the second tube row, which is the final path through which the refrigerant finally flows, when the compressor is turned off, The temperature of air immediately after passing through the ventilation gap between adjacent heat exchange tubes of the tube group becomes higher than the temperature of air immediately after passing through the ventilation gap between adjacent heat exchange tubes of other tube groups. . In addition, the refrigerant flow directions in the tube groups located at the left and right ends of the first tube row and the second tube row are the same, and one tube path is constituted by the two tube groups, so that the compressor is off. However, the refrigerant tends to remain in the heat exchange tubes of the tube groups at the left and right ends of both tube rows, and the temperature of the air immediately after passing through the ventilation gap between adjacent heat exchange tubes of both tube groups is relatively low. Become.

  In addition, according to the evaporators 1) to 6) described above, the refrigerant that has passed through the ventilation gap between the adjacent heat exchange tubes in the tube group in the central portion in the left-right direction of the second tube row that is the final path through which the refrigerant finally flows. Hot air is sent through a relatively short duct to a blowout port provided in the center of the driver's seat and the passenger's seat, and is located at a portion near the left and right ends of the tube group at the center in the left-right direction of the second tube row. The air that has passed through the ventilation gap between some adjacent heat exchange tubes, and the air that has passed through the ventilation gap between adjacent heat exchange tubes of the tube groups located at the left and right ends of the first tube row and the second tube row Low-temperature air is sent through a relatively long duct to an outlet provided on the window side of the driver's seat and passenger seat. Therefore, the temperature immediately after passing the evaporator of the air blown out from the window side outlets of the driver's seat and the passenger seat is higher than the temperature immediately after passing the evaporator of the air in the central part of the driver's seat and the front passenger seat. Lower. And since the degree to which the air sent to the driver side and the passenger side window side air outlet is warmed is higher than the degree to which the air sent to the air outlet at the center of the vehicle is warmed, And the temperature of air blown out from the window outlet and the center of the passenger seat and the window outlet, and the variation in the temperature of the air blown into the passenger compartment from four locations is reduced. The decrease in comfort can be suppressed.

FIG. 3 is a partially cutaway perspective view specifically showing the evaporator of the present invention. It is the AA line expanded sectional view of Drawing 1 which omitted some. It is the BB line expanded sectional view of Drawing 1 which omitted some. It is a figure which shows the flow of the refrigerant | coolant in the evaporator of FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In the embodiment described below, the evaporator according to the present invention is applied to a refrigeration cycle constituting a vehicle air conditioner. In this embodiment, air flows in the direction indicated by the arrow X in the drawing, passes through the evaporator, and is sent into the vehicle interior of the vehicle in which the vehicle air conditioner is mounted.

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

  FIG. 1 shows the overall configuration of an evaporator to which the evaporator of the present invention is applied, FIGS. 2 and 3 schematically show the configuration, and FIG. 4 shows the flow of refrigerant in the evaporator of FIG.

  1 to 3, the evaporator (1) is in the left-right direction (the direction perpendicular to the ventilation direction) with the width direction directed to the ventilation direction indicated by arrow X in FIG. 1 and the longitudinal direction directed to the vertical direction. The leeward side tube row (3) (first tube row) and the upwind side tube row (4) comprising a plurality of aluminum heat exchange tubes (2) arranged at intervals, and the leeward side tube row (3) The heat exchange tubes (2) are arranged on both upper and lower ends (both ends in the longitudinal direction) with the longitudinal direction facing the left and right direction (the direction in which the heat exchange tubes (2) are arranged), and all of the leeward tube rows (3) An aluminum leeward lower header (5) (first header) and an aluminum leeward upper header (6) (second header) to which the heat exchange tube (2) is connected, 4) The heat exchange tube (2) in the upper and lower ends of the heat exchange tube (7) (third header part) made of aluminum, which is disposed toward the direction of (2) and to which the total heat exchange tube (2) of the windward tube row (4) is connected, and A windward upper header section (8) (fourth header section). The number of heat exchange tubes (2) in the leeward tube row (3) is equal to the number of heat exchange tubes (2) in the windward tube row (4).

  Both tube rows (3) (4) are placed outside the ventilation gap (9) between adjacent heat exchange tubes (2) of both tube rows (3) and (4) and outside the heat exchange tubes (2) on both left and right ends. The aluminum corrugated fins (11) are placed so as to be shared across the heat exchange tubes (2) and brazed to both heat exchange tubes (2), and the outer sides of the corrugated fins (11) at the left and right ends. Aluminum side plates (12) are respectively disposed and brazed to the corrugated fins (11). A ventilation gap (9) is also formed between the heat exchange tubes (2) at the left and right ends and the side plates (12). The air that has passed through the ventilation gap (9) between the adjacent heat exchange tubes (2) in the tube rows (3) and (4) is sent into the vehicle compartment of the vehicle in which the vehicle air conditioner is mounted.

  An odd number of 5 or more consisting of a plurality of heat exchange tubes (2) arranged in series in the leeward side tube row (3), here, the first to fifth five tube groups (13), (14), (15) (16) (17) is provided, and the tube group (13) (14) of the plurality of heat exchange tubes (2) arranged continuously in the windward tube row (4) and in the leeward tube row (3). ), (15), (16), and (17), a number that is two less, here, six to eighth tube groups (18), (19), and (21) are provided. In the leeward tube row (3), the first tube group (13) is located at the center in the left-right direction, and the second and third tube groups (14), (15) are the left and right sides of the first tube group (13). Located on both sides, the fourth and fifth tube groups (16), (17) are located on the left and right ends. In the windward tube row (4), the sixth and seventh tube groups (18), (19) are located at the left and right ends, and the eighth tube group (21) is located at the center in the left-right direction. The total width in the left-right direction of the first to third tube groups (13), (14), and (15) is the same as the width in the left-right direction of the eighth tube group (21), and the fourth tube group (16) and the fourth tube group (16) The width in the left-right direction of the 6 tube group (18) is the same, and the width in the left-right direction of the fifth tube group (17) and the seventh tube group (19) is the same. The first tube group (13) at the center in the left-right direction of the leeward side tube row (3) becomes the first path through which the refrigerant flows first, and the eighth tube at the center in the left-right direction of the windward side tube row (4). The tube group (21) is the final path through which the refrigerant flows last.

  The leeward lower header (5) and the windward lower header (7), and the leeward upper header (6) and the windward upper header (8) are, for example, in one tank (22) (23). Is divided into two spaces in the ventilation direction by partition portions (22a) and (23a) extending in the left-right direction.

  The leeward side lower header portion (5) is provided with a refrigerant inlet (24) by dividing the inside of the leeward side lower header portion (5) into a plurality of spaces arranged in the left-right direction by the dividing portion (5a). A first section (25) through which the heat exchange tube (2) of one tube group (13) communicates and a second section (26) through which the heat exchange tubes (2) of the second and fourth tube groups (14) and (16) communicate. ) And a third section (27) through which the heat exchange tubes (2) of the third and fifth tube groups (15) and (17) communicate. The refrigerant inlet (24) is provided downward on the lower wall portion of the leeward lower header portion (5).

  By dividing the leeward side upper header part (6) into a plurality of spaces arranged in the left and right direction by the dividing part (6a), the first to third tube groups (13) (14) A fourth section (28) through which the heat exchange tube (2) of (15) communicates, a fifth section (29) through which the heat exchange tube (2) of the fourth tube group (16) communicates, and a fifth tube A sixth section (31) through which the heat exchange tube (2) of the group (17) communicates is provided.

  By dividing the inside of the windward lower header part (7) into a plurality of spaces arranged in the left and right direction by the dividing part (7a) in the windward lower header part (7), heat exchange of the sixth tube group (18) A seventh compartment (32) through which the tube (2) communicates, an eighth compartment (33) through which the heat exchange tube (2) of the seventh tube group (19) communicates, a refrigerant outlet (35) and an eighth tube A ninth section (34) through which the heat exchange tube (2) of the group (21) communicates is provided. The refrigerant outlet (35) is provided downward on the lower wall portion of the windward lower header portion (7).

  The 10th section (36) through which the heat exchange tube (2) of the sixth tube group (18) communicates and the heat exchange tube (2) of the seventh tube group (19) communicate with the upwind header section (8). An eleventh section (37) and a twelfth section (38) through which the heat exchange tube (2) of the eighth tube group (21) communicates are provided, and the tenth and eleventh sections (36), (37) and the Twelve sections (38) are connected. That is, the inside of the windward upper header portion (8) is not divided into a plurality of spaces, and the dividing portion is between the tenth and eleventh sections (36), (37) and the twelfth section (38). not exist.

  The portion where the heat exchange tube (2) of the fourth tube group (16) communicates with the second compartment (26) of the leeward lower header portion (5) and the seventh compartment of the leeward lower header portion (7). (32) is communicated through a plurality of communication holes (39) (communication portion) provided in the partition portion (22a), and the third section (27) in the third section (27) of the leeward side lower header portion (5) is provided. A portion where the heat exchange tubes (2) of the 5 tube group (17) communicate with each other and an eighth section (33) of the windward lower header portion (7) are provided in the partition portion (22a). The fifth section (29) of the leeward upper header section (6), the tenth section (36) of the leeward upper header section (8), and the leeward are communicated through the communication hole (41) (communication section). The sixth section (31) of the upper header section (6) and the eleventh section (37) of the windward upper header section (8) each have a plurality of communication holes (42) provided in the partition section (23a). (43) It is made to communicate through (communication part).

  As described above, the leeward side tube row (3) and the leeward side tube row (4) are provided with the first to eighth tube groups (13) to (19) (21), and both the leeward side header portions (5 ) (6) and the windward header sections (7) and (8) as described above, the refrigerant inlet (24), the refrigerant outlet (35) and the first to twelfth sections (25) to (29) (31) ˜ (34) (36) ˜ (38) are provided so that the refrigerant flows in the heat exchange tubes (2) of the first tube group (13) and the fourth to seventh tube groups (16) to (19). The refrigerant flows from the bottom to the top, and the refrigerant flows from the top to the bottom in the heat exchange tubes (2) of the second tube group (14), the third tube group (15), and the eighth tube group (21). The first to third tube groups (13) to (15) and the eighth tube group (21) constitute one heat exchange path, and the fourth and sixth tube groups. (16) (18) constitutes one heat exchange path The fifth and seventh two tube groups (17) and (19) constitute one heat exchange path.

  Therefore, as shown in FIG. 4, the refrigerant depressurized by the decompressor flows into the first section (25) from the refrigerant inlet (24), flows through the four paths as follows, and passes through the ninth section (34). ) From the refrigerant outlet (35) toward the compressor. The first path consists of the first section (25), the first tube group (13), the fourth section (28), the second tube group (14), the second section (26), and the fourth tube group (16). The fifth section (29), the communication hole (42), the tenth section (36), the twelfth section (38), the eighth tube group (21), and the ninth section (34). The second path consists of the first section (25), the first tube group (13), the fourth section (28), the second tube group (14), the second section (26), the communication hole (39), They are 7 divisions (32), 6th tube group (18), 10th division (36), 12th division (38), 8th tube group (21), and 9th division (34). The third path consists of the first section (25), the first tube group (13), the fourth section (28), the third tube group (15), the third section (27), and the fifth tube group (17). The sixth section (31), the communication hole (43), the eleventh section (37), the twelfth section (38), the eighth tube group (21), and the ninth section (34). The fourth path consists of the first section (25), the first tube group (13), the fourth section (28), the third tube group (15), the third section (27), the communication hole (41), They are 8 divisions (33), 7th tube group (19), 11th division (37), 12th division (38), 8th tube group (21), and 9th division (34). The first tube group (13) is in the first pass, the second and third tube groups (15) are in the second pass, both the fourth and sixth tube groups (18), and Both tube groups 5 and 7 (19) constitute the third pass, and the eighth tube group (21) constitutes the fourth pass.

  The evaporator (1) described above constitutes a refrigeration cycle together with a compressor, a condenser as a refrigerant cooler, and an expansion valve as a decompressor, and is mounted on a vehicle, for example, an automobile, as a vehicle air conditioner. Then, for example, air that has passed through the ventilation gap (9) closer to the vehicle center (right side) in the left half of the evaporator (1) is sent to a blowout port provided in the vehicle center through a relatively short duct and Air blown out from the mouth toward the driver's seat and passed through the ventilation gap (9) on the window side (left side) in the left half is sent to the air outlet provided on the window side through a relatively long duct and the air outlet The air is blown out toward the driver's seat. In addition, the air that has passed through the ventilation gap (9) near the center of the vehicle (left side) in the right half of the evaporator (1) is sent to the outlet provided in the center of the vehicle through a relatively short duct and the outlet The air that was blown out from the front passenger seat and passed through the window side (right side) ventilation gap (9) in the right half is sent to the air outlet provided on the window side through a relatively long duct and from the air outlet. It is blown out toward the passenger seat.

  When the compressor is on, the refrigerant that has passed through the compressor, the condenser, and the expansion valve flows in from the refrigerant inlet (24) and out of the refrigerant outlet (35) through the four paths described above. While flowing in the heat exchange tube (2) of the tube row (3) and the heat exchange tube (2) of the windward side tube row (4), heat exchange is performed with the air passing through the ventilation gap (9). The air is cooled and the refrigerant flows out as a gas phase. As described above, the air that has passed through the refrigerant is blown out from the air outlet provided in the center of the vehicle and the air outlet provided on the window side to the driver's seat and the passenger seat, thereby cooling the passenger compartment.

  That is, after passing through the ventilation gap (9) provided between the adjacent heat exchange tubes (2) in the left half of the eighth tube group (21) of the evaporator (1), the first tube group (13) Ventilation gap (9) provided between adjacent heat exchange tubes (2) on the left half, and Ventilation gap (9) provided between adjacent heat exchange tubes (2) of the second tube group (14) The air that has passed through is sent to a blowout port provided in the center of the vehicle through a relatively short duct, and blown out from the blowout port toward the driver's seat. 2) After passing through the ventilation gap (9) provided between, the air that passed through the ventilation gap (9) provided between the adjacent heat exchange tubes (2) of the fourth tube group (16) is compared. Through the long duct and sent to the outlet provided on the window side. It is adapted to be blown out toward the Utateseki. Further, after passing through the ventilation gap (9) provided between the adjacent heat exchange tubes (2) in the right half of the eighth tube group (21) of the evaporator (1), the first tube group (13) Ventilation gap (9) provided between adjacent heat exchange tubes (2) in the right half, and Ventilation gap (9) provided between adjacent heat exchange tubes (2) of the third tube group (15) The air that has passed through is sent to a blowout port provided in the center of the vehicle through a relatively short duct and blown out from the blowout port toward the passenger seat, and the heat exchange tubes adjacent to the seventh tube group (19) ( 2) After passing through the ventilation gap (9) provided between, the air that passed through the ventilation gap (9) provided between the adjacent heat exchange tubes (2) of the fifth tube group (17) is compared. Through the long duct and sent to the outlet provided on the window side, and the assistant from the outlet It has become as to be blown out toward the.

  When the compressor is off, the temperature of the air immediately after passing through the ventilation gap (9) between the adjacent heat exchange tubes (2) of the eighth tube group (21) having the superheat region is adjacent to the other tube groups. It becomes higher than the temperature of the air immediately after passing through the ventilation gap (9) between the matching heat exchange tubes (2). In the fourth tube group (16) and the sixth tube group (18), and in the fifth tube group (17) and the seventh tube group (19), the flow direction of the refrigerant is the same from the bottom to the top. Since both the tube groups (16), (18) and (17), (19) constitute one path, these tube groups (16), (18) and (17 ) (19) The heat exchange tube (2) is likely to leave a refrigerant, and as a result, the ventilation gap between the adjacent heat exchange tubes (2) of both tube groups (16) (18) and (17) (19). The temperature of the air immediately after passing through (9) is relatively low.

  Therefore, the temperature of the air immediately after passing the evaporator (1) of the air blown from the window side outlet of the driver's seat and the passenger's seat is the temperature of the air blown from the outlet of the vehicle central portion of the driver's seat and the passenger's seat (1). The temperature is lower than the temperature immediately after passing, and the degree of warming of the air sent to the driver's and front passenger's window side air outlets is higher than the degree of warming of the air sent to the air outlets in the center of the vehicle Therefore, the temperature of the air blown out from the vehicle central part of the driver's seat and the window-side outlet and the vehicle central part of the passenger seat and the window-side outlet is made uniform, and the air blown out from the four places into the vehicle interior The variation in the temperature of the passenger can be reduced, and a decrease in passenger comfort can be suppressed.

  In the evaporator according to the present invention, the heat exchange tubes (2) of the first tube group (13) and the fourth to seventh tube groups (16) to (19) are opposite to the evaporator (1) of the embodiment described above. The refrigerant flows from top to bottom in the interior, and the refrigerant flows from bottom to top in the heat exchange tubes (2) of the second tube group (14), the third tube group (15), and the eighth tube group (21). In addition, a refrigerant inlet (24), a refrigerant outlet (35), and first to twelfth sections (25) to (29) (31) to (34) (36) to (38) may be provided.

  Moreover, in the evaporator (1) of embodiment mentioned above, five tube groups (13)-(17) are provided in the leeward side tube row | line | column (3) (1st tube row | line | column), and an upwind side tube row | line | column (4) Three tube groups (18), (19) and (21) are provided in the (second tube row), but an odd number of five or more tube groups are provided in the leeward tube row (3). If (4) is provided with two less tube groups than the tube group of the leeward side tube row (3), the number of tube groups is not limited to the number of the embodiments described above.

  The evaporator according to the present invention is suitably used for a refrigeration cycle constituting a vehicle air conditioner.

(1): Evaporator
(2): Heat exchange tube
(3): Downward tube row (first tube row)
(4): Windward tube row (second tube row)
(5): Downward lower header (first header)
(6): Downward upper header (second header)
(7): Upwind lower header (third header)
(8): Windward upper header (fourth header)
(13): First tube group (tube group at the center in the left-right direction of the first tube row)
(14) (15): Second and third tube groups
(16) (17): 4th and 5th tube group (both ends in the left and right direction of the 1st tube row)
(18) (19): Sixth and seventh tube groups (tube groups on both ends of the second tube row in the left-right direction)
(21): Eighth tube group (tube group at the center in the left-right direction of the second tube row)
(24): Refrigerant inlet
(25): First section (center section of the first header section)
(26) (27): 2nd and 3rd sections (left and right end sections of the first header section)
(28): Fourth section (center section of the second header section)
(29) (31): Fifth and sixth sections (left and right end sections of the second header section)
(32) (33): Seventh and eighth sections (left and right end sections of the third header section)
(34): 9th section (center section of the 3rd header section)
(35): Refrigerant outlet
(36) (37): Tenth and eleventh sections (left and right end sections of the fourth saddle section)
(38): 12th section (center section of the 4th header section)
(39) (41) (42) (43): Communication hole

Claims (6)

A plurality of heat exchange tubes arranged at intervals in a direction perpendicular to the ventilation direction with the longitudinal direction oriented in the vertical direction, and the first tube row and the second tube row arranged in the ventilation direction; A first header section and a second header section, which are arranged on both ends in the longitudinal direction of the heat exchange tubes of the first tube row, with the longitudinal direction directed in the direction of arrangement of the heat exchange tubes, and to which the total heat exchange tubes of the first tube row are connected A header portion and a third header in which the longitudinal direction is arranged on both ends of the longitudinal direction of the heat exchange tubes in the second tube row with the heat exchange tubes arranged in the longitudinal direction and the total heat exchange tubes in the second tube row are connected An evaporator comprising a portion and a fourth header portion,
The first tube row is provided with an odd number of five or more groups of heat exchange tubes arranged in series, and the first tube row comprises a plurality of heat exchange tubes arranged in series in the second tube row. Two tube groups fewer than the tube groups in the tube row are provided, and the tube group at the center in the left-right direction of the first tube row becomes the first path through which the refrigerant flows first, and the left-right direction of the second tube row The central tube group is the final path through which the refrigerant flows last. In the first tube row, the refrigerant sequentially flows from the tube group serving as the first pass toward the left and right tube groups, and in the second tube row, the left and right ends. The refrigerant is made to flow sequentially from the tube group toward the tube group as the final pass,
An evaporator in which the refrigerant flow directions in the tube groups located at the left and right ends of the first tube row and the second tube row are the same, and one path is constituted by both the tube groups. The first header portion is provided with a refrigerant inlet and the center section through which the heat exchange tubes of the center tube group in the left and right direction communicate, and the heat exchange between the left and right end tube groups and the left and right end tube groups provided in the left and right direction Left and right end sections through which the tubes communicate, the second header section has left and right end sections through which the heat exchange tubes of the left and right end tube groups communicate, and the third header section is provided with a refrigerant outlet and at the center in the left-right direction. A central section through which the heat exchange tubes of the tube group communicate, and left and right end sections through which the heat exchange tubes of the left and right end tube groups communicate, and the fourth header section includes left and right end sections through which the heat exchange tubes of the left and right end tube groups communicate. A central section through which the heat exchange tubes of the tube group in the center in the left-right direction communicate with,
The portion where the heat exchange tubes of the left and right end tube groups in the left and right end sections of the first header section communicate with the left and right end sections of the third header section are communicated, and the left and right end sections of the second header section, The evaporator according to claim 1, wherein the heat exchange tubes of the left and right end tube groups in the left and right end sections of the four header portions communicate with each other. In the first tube row, the first to fifth tube groups are arranged such that the first tube group is located at the center in the left-right direction, and the second and third tube groups are located on the left and right sides of the first tube group, The fourth and fifth tube groups are provided so as to be located at both left and right ends,
Sixth to eighth tube groups are provided in the second tube row so that the sixth tube group is located at the center in the left-right direction, and the seventh and eighth tube groups are located at both left and right ends,
The first header portion is provided with a refrigerant inlet, and the first section through which the heat exchange tubes of the first tube group communicate, the second section through which the heat exchange tubes of the second and fourth tube groups communicate, and the third and fifth sections. A third compartment through which the heat exchange tubes of the tube group are connected,
A fourth section through which the heat exchange tubes of the first to third tube groups communicate with the second header section, a fifth section through which the heat exchange tubes of the fourth tube group communicate, and a first section through which the heat exchange tubes of the fifth tube group communicate. There are 6 sections,
The third header portion is provided with a seventh section through which the heat exchange tube of the sixth tube group communicates, an eighth section through which the heat exchange tube of the seventh tube group communicates, a refrigerant outlet, and a heat exchange tube of the eighth tube group And a ninth section that leads to
A tenth section through which the heat exchange tube of the sixth tube group communicates with the fourth header section, an eleventh section through which the heat exchange tube of the seventh tube group communicates, and a twelfth section through which the heat exchange tube of the eighth tube group communicates. Are provided, and the tenth and eleventh sections are connected to the twelfth section,
The portion where the heat exchange tubes of the fourth tube group in the second section of the first header section communicate with the seventh section of the third header section communicates, and the fifth section in the third section of the first header section. The portion of the tube group in which the heat exchange tubes communicate with the eighth section of the third header section is communicated, and the fifth section of the second header section, the tenth section of the fourth header section, and the second header The evaporator according to claim 2, wherein the sixth section of the section and the eleventh section of the fourth header section are respectively communicated. The total width in the left-right direction of the first to third tube groups is the same as the width in the left-right direction of the eighth tube group, the width in the left-right direction of the fourth tube group and the sixth tube group is the same, The evaporator according to claim 3, wherein the tube group and the seventh tube group have the same width in the left-right direction. The first tube row, the first header portion, and the second header portion are provided on the leeward side, and the second tube row, the third header portion, and the fourth header portion are provided on the leeward side. The evaporator as described in any one of. The evaporator according to any one of claims 1 to 5, wherein the refrigerant flows from the bottom to the top in the heat exchange tubes of the left and right end tube groups of the first and second tube rows.

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