JP4671732B2 - Air conditioner for vehicles - Google Patents

Description

  The present invention relates to an air conditioner mounted on a vehicle, and particularly belongs to a technical field of a structure in which a cooling heat exchanger is accommodated in a casing of an air conditioner.

  Conventionally, as disclosed in Patent Document 1, for example, a vehicle air conditioner mounted on an automobile or the like includes a resin casing, a cooling heat exchanger accommodated in the casing, and heating heat. And an exchange. The cooling heat exchanger is an evaporator that constitutes one element of the refrigeration apparatus, and is disposed so that the air-conditioning air passage surface extends substantially in the vertical direction, and is held on the inner surface of the casing in this state.

The air-conditioning air introduced into the casing is first cooled by exchanging heat with the refrigerant that passes through the cooling heat exchanger and flows inside the cooling heat exchanger. At this time, condensed water is generated on the surface of the cooling heat exchanger. This condensed water flows downward along the surface of the cooling heat exchanger. A part or all of the air cooled by the cooling heat exchanger passes through the heating heat exchanger and is adjusted in temperature, and then blown out from the outlet of the casing to each part of the vehicle compartment.
JP 2004-249903 A

  However, when the cooling heat exchanger is held on the inner surface of the casing as in Patent Document 1, a part of the air conditioning air introduced into the casing is separated from the outer periphery of the cooling heat exchanger and the casing. There is a risk of leakage from between the inner surface and the downstream side. When this happens, the air-conditioning air introduced into the casing cannot be efficiently cooled, and the air-conditioning performance deteriorates.

  In addition, the condensed water generated in the cooling heat exchanger when cooling the air-conditioning air flows downward, so that there is almost no upper part of the heat exchanger, and a relatively large amount exists in the lower part. For this reason, condensed water tends to accumulate in the lower part of the cooling heat exchanger. Of the condensed water accumulated in the lower part of the cooling heat exchanger, the condensed water accumulated in the portion that tends to be low in the cooling heat exchanger may start to freeze. When condensed water begins to freeze, it becomes an obstacle to heat exchange, so it is necessary to control the operation of the refrigeration apparatus to prevent the condensed water from freezing. In other words, although there is almost no risk of freezing of the condensed water at the upper part of the cooling heat exchanger, the operation of the refrigeration apparatus is stopped and the temperature of the part that tends to be low at the lower part of the cooling heat exchanger is Since it is necessary to wait for the temperature to rise to a temperature that is difficult to freeze, it is difficult to improve the air conditioning performance.

  The present invention has been made in view of such various points, and the object of the present invention is to condense water while suppressing leakage of air-conditioning air from between the outer peripheral portion of the cooling heat exchanger and the casing. An object of the present invention is to improve the air-conditioning performance by preventing the condensate from freezing by making it difficult to accumulate in a portion of the cooling heat exchanger that tends to be low in temperature.

  In order to achieve the above object, in the present invention, a sealing member is provided between the outer peripheral portion of the cooling heat exchanger and the casing, and the shape of the sealing member is devised so that the cooling heat exchanger can be The condensed water can be drained.

  Specifically, in the invention of claim 1, a casing into which air-conditioning air is introduced, a cooling heat exchanger that is accommodated in the casing and that cools the air-conditioning air introduced into the casing through the casing. A vehicle air conditioner equipped with

The cooling heat exchanger includes a plurality of paths through which the refrigerant sequentially flows so as to be arranged in a direction intersecting the air-conditioning air passage direction, and a high-pressure refrigerant is present in the most upstream path in the refrigerant flow direction. The refrigerant is introduced via the decompression means, and the refrigerant is configured to flow to a downstream path in the refrigerant flow direction. The cooling heat exchanger is disposed such that the air-conditioning air passage surface extends in a substantially vertical direction. In the casing, there is provided a holding part for holding the outer peripheral part of the cooling heat exchange, and between the holding part and the outer peripheral part of the cooling heat exchanger, air for air conditioning and the holding part are provided. suppressing from between the outer peripheral portion of the cooling heat exchanger from leaking to the leeward side in the casing sealing member is provided, the seal member is affixed to the cooling heat exchanger, in the seal member, of exposing the leeward side in the lower part of the cooling heat exchanger A notch is formed, and an opening continuous with the notch is formed at a portion facing the lower end surface of the cooling heat exchanger, and the notch is downstream of the most upstream path in the refrigerant flow direction. It is set as the structure arrange | positioned so as to correspond to the path | pass adjacent to.

  According to this configuration, the space between the outer peripheral portion of the cooling heat exchanger and the holding portion of the casing is sealed with the sealing member. Thus, the air-conditioning air introduced into the casing and flowing toward the cooling heat exchanger is prevented from leaking to the leeward side in the casing from between the cooling heat exchanger and the holding portion. As a result, substantially the entire amount of air-conditioning air passes through the cooling heat exchanger, and the air-conditioning air can be efficiently cooled.

  At this time, the condensed water generated in the cooling heat exchanger flows downward. Further, since the relatively low temperature air that has been cooled by passing through the windward side of the cooling heat exchanger flows on the leeward side of the cooling heat exchanger, the temperature on the leeward side of the cooling heat exchanger is Lower than Therefore, the leeward side of the cooling heat exchanger is in a temperature state in which condensed water is more likely to freeze than the leeward side. Since the leeward side of the lower part of the cooling heat exchanger is exposed from the sealing member, the condensed water is drained below the cooling heat exchanger through the portion exposed from the sealing member. Thereby, it becomes difficult for condensed water to accumulate in the part which is easy to become low temperature of the heat exchanger for cooling.

Further , it is possible to expose the leeward side of the lower portion of the cooling heat exchanger by a simple method of forming a notch in the seal member. In addition, since only a predetermined area on the leeward side in the lower part of the cooling heat exchanger is exposed from the seal member, the seal member is disposed between the portion other than the exposed part on the leeward side and the holding portion of the casing. become. By arranging the sealing member also on the leeward side of the cooling heat exchanger in this way, it becomes possible to increase the area where the cooling heat exchanger is held by the holding portion via the sealing member. Further, it becomes possible to suppress rattling of the heat exchanger for cooling when the seal member changes with time.

In addition , most of the refrigerant introduced into the most upstream path of the cooling heat exchanger is a liquid component, and this refrigerant flows into the downstream path and evaporates in the process of exchanging heat with air-conditioning air. The liquid component decreases and the gas component increases. When this gas component increases, the pressure loss of the refrigerant increases, and the evaporation pressure decreases accordingly, and the evaporation temperature decreases. Therefore, the portion constituting the path adjacent to the downstream side of the most upstream path of the cooling heat exchanger The surface temperature of is relatively low. Since the portion where the surface temperature is low is exposed from the seal member by the notch, it is possible to reliably reduce the condensed water accumulated in the portion where the temperature of the cooling heat exchanger tends to be low.

Further , the condensed water is drained from the opening of the seal member to the lower side of the cooling heat exchanger.

Further , the sealing member can be easily fixed without being displaced with respect to the cooling heat exchanger .

  According to the invention of claim 1, the shape of the seal member provided between the outer peripheral portion of the cooling heat exchanger and the holding portion of the casing is configured to expose the leeward side in the lower portion of the cooling heat exchanger. As a result, air conditioning air is prevented from leaking from the outer periphery of the cooling heat exchanger to the leeward side, while condensate is less likely to accumulate in the cooling heat exchanger where it tends to be cold, and condensate water is prevented from freezing. In addition, the operation time of the refrigeration apparatus can be lengthened, and thereby the air conditioning performance can be improved.

Moreover , since the notch part was formed in the sealing member and the lower part of the heat exchanger for cooling was exposed, manufacture of a sealing member can be made easy. In addition, since only a predetermined area on the leeward side in the lower part of the cooling heat exchanger is exposed, a seal member can be disposed between the part other than the exposed part on the leeward side and the holding part of the casing. it can. Thereby, when the sealing member changes with time, rattling of the heat exchanger for cooling can be suppressed, sealing performance can be ensured, and generation of abnormal noise can be prevented.

In addition , since the cutout portion of the seal member is formed so as to correspond to the downstream path adjacent to the most upstream path of the cooling heat exchanger, the condensed water that collects in the portion that tends to be low in the cooling heat exchanger Can be reliably reduced.

Moreover , since the opening is formed in the seal member, the drainage of the condensed water can be further improved.

Further , since the sealing member can be simply fixed without being displaced by simply attaching the sealing member to the cooling heat exchanger, the manufacturing cost can be reduced .

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature and is not intended to limit the present invention, its application, or its use.

  FIG. 1 shows an air conditioning unit 100 constituting a vehicle air conditioner according to an embodiment of the present invention. In the description of this embodiment, for convenience of explanation, the front side of the vehicle is simply referred to as “front”, the rear side of the vehicle is simply referred to as “rear”, the left side of the vehicle is simply referred to as “left”, and the vehicle The right side is simply called “right”.

  The air conditioner is housed in an instrument panel (not shown) disposed in the front part of the passenger compartment, and includes a blower unit (not shown) in addition to the air conditioning unit 100. The blower unit includes a blower fan, a fan drive motor, and the like, and is configured to blow air for air conditioning. On the other hand, the air conditioning unit 100 is configured to adjust the temperature of the air-conditioning air blown from the blower unit and supply the air-conditioning air to each part of the passenger compartment.

  As shown in FIG. 2, the air conditioning unit 100 includes a resin casing 101 and a substantially rectangular cooling heat exchanger 1 and heating heat exchanger 102 housed in the casing 101. The casing 101 is configured by combining an upper case constituent member 103 and a lower case constituent member 104. An air introduction port 105 extending in the vertical direction is formed on the front side of the right side wall of the casing 101, so that the air-conditioning air blown from the blowing unit is introduced into the casing 101 through the air introduction port 105. It has become. On the upper side of the casing 101, although not shown, a plurality of air outlets through which conditioned air generated therein is blown out are formed.

  The cooling heat exchanger 1 is an evaporator constituting one element of the refrigeration apparatus, and is accommodated in front of the air inlet 105 in the casing 100. The cooling heat exchanger 1 is arranged such that the air passage surface extends substantially in the vertical direction in a slightly inclined state so as to be located on the front side as it goes upward. As shown in FIGS. 3 and 4, a lower holding portion 107 that holds the lower portion of the cooling heat exchanger 1 is provided on the lower wall portion 104 a of the lower case constituent member 104. The lower holding portion 107 includes a rear side portion 108 that holds the rear end side in the lower portion of the cooling heat exchanger 1, a first rib 109 that holds an intermediate portion in the front-rear direction in the lower portion of the cooling heat exchanger 1, and The second rib 110 includes a front side portion 111 that holds the lower front end side of the cooling heat exchanger 1. The rear side portion 108 and the front side portion 111 are formed by causing the lower wall portion 104 a of the lower case constituent member 104 to bulge into the casing 101 in a mountain shape. The first rib 109 and the second rib 110 are formed so as to protrude upward from the lower wall portion 104a of the lower case constituent member 104 and extend in the left-right direction, and as shown in FIG. A plurality are arranged at intervals in the direction. As shown in FIG. 4, the protruding heights of the first rib 109 and the second rib 110 correspond to the inclined arrangement of the cooling heat exchanger 1, and the protruding height of the first rib 109 is the second. It is set higher than the rib 110. Further, the first rib 109 is formed so as to correspond to a portion where the second rib 110 is not formed when viewed from the front-rear direction. Due to the lower holding portion 107, the cooling heat exchanger 1 is in a state of floating from the lower wall portion 104a.

  Moreover, as shown in FIG.1 and FIG.3, the right side holding part which hold | maintains the right side part, left side part, and upper part of the heat exchanger 1 for cooling on the right wall part, left wall part, and upper wall part of the casing 101, respectively. 113, a left side holding part 114 and an upper side holding part 115 are provided. The right side holding part 113, the left side holding part 114, the upper side holding part 115, and the lower side holding part 107 are continuous.

  The heating heat exchanger 102 is disposed downstream of the cooling heat exchanger 1 in the flow direction of the air-conditioning air. Further, a temperature adjusting door (not shown) is provided in the casing 101. The amount of air conditioning air that has passed through the cooling heat exchanger 1 that passes through the heating heat exchanger 102 is determined by the temperature adjustment door. The air for air conditioning passes through the cooling heat exchanger 1 to the heat exchanger 102 for heating to become conditioned air, and this conditioned air is blown out from the outlet.

  As shown in FIG. 5, the cooling heat exchanger 1 includes a plurality of heat transfer members 3 formed by stacking and joining a pair of molding plates 2 and stacked in the left-right direction via heat transfer fins 4. The main body 5 and end plates 6 provided at both ends of the main body 5 in the stacking direction, that is, the left end portion and the right end portion. The air for air conditioning passes through the fins 4 between the heat transfer members 3 in a direction substantially orthogonal to the stacking direction of the heat transfer members 3.

  In each heat transfer member 3, it communicates with the windward side refrigerant passage 7 and the leeward side refrigerant passage 8 (both shown only in FIG. 7) extending in parallel in the vertical direction, and the upper end portion and the lower end portion of the windward refrigerant passage 7. A windward upper space and a windward lower space (not shown) and a leeward upper space and a leeward lower space (not shown) communicating with the upper and lower ends of the leeward refrigerant passage 8 are formed. . The windward side refrigerant passage 7 and the leeward side refrigerant passage 8 have a flat shape that is long in the air flow direction.

  As shown in FIG. 8, each of the pair of molding plates 2 is obtained by press molding an aluminum plate material. As shown in FIG. 6, the windward upper cup part 10 and the leeward upper cup part 11 are formed at the upper part of each forming plate 2 with a gap in the air-conditioning air flow direction. The windward upper cup part 10 and the leeward upper cup part 11 have substantially the same shape. Further, an upwind lower cup portion 12 and a leeward lower cup portion 13 are formed at a lower portion of the forming plate 2 with an interval in the flow direction of the air for air conditioning. These lower cup portions 12 and 13 have substantially the same shape. On the bottom surfaces of the cup portions 10 to 13, substantially oval openings 10 a to 13 a that are long in the air flow direction are formed.

  The forming plate 2 includes an upwind passage component 15 extending from the upwind upper cup portion 10 to the upwind lower cup portion 12 and an upwind side extending from the downwind upper cup portion 11 to the downwind lower cup portion 13. A passage component 16 is formed. The width of the windward side passage component 15 is set to be substantially the same as the dimension in the same direction of the windward upper cup portion 10. The depth of the windward side passage component 15 is set to be shallower than the depth of the windward upper cup portion 10. The leeward side passage component 16 has substantially the same shape as the leeward side passage component 15.

  The molding plate 2 is formed with a joint portion 17 to be joined to the molding plate 2 to be joined. The joint portion 17 includes a peripheral portion of the forming plate 2, between the windward upper cup portion 10 and the leeward upper cup portion 11, between the windward lower cup portion 12 and the leeward lower cup portion 13, and the windward passage. It is formed continuously between the component 15 and the leeward passage component 16. Note that a brazing material is provided in layers on both surfaces of the molding plate 2, and the brazing material is joined to the molding plate 2 to be joined.

  As shown in FIGS. 7 and 8, the leeward passage constituting portion 15 is formed with a plurality of bulging portions 20 that bulge toward the windward refrigerant passage 7 side. The front end surface of each bulging portion 20 is positioned substantially on the same plane as the joint portion 17, and is joined to the front end surface of the bulging portion 20 of the molding plate 2 to be joined. The said bulging part 20 is arrange | positioned at intervals in the up-down direction and the width direction of the upwind path structure part 15. The leeward side passage constituting portion 16 is also formed with a bulging portion 20 in the same manner as the leeward side passage constituting portion 15.

  When the pair of molding plates 2 are overlapped to join the protrusions 17, the windward side refrigerant passage 7 and the leeward side refrigerant passage 8 are constituted by the windward side passage constituting portion 15 and the leeward side passage constituting portion 16, respectively. At this time, the windward upper space is constituted by the windward upper cup portion 10, and the leeward upper space is constituted by the leeward upper cup portion 11. Further, the windward lower cup portion 12 constitutes the windward lower space, and the leeward lower cup portion 13 constitutes the leeward lower space.

  When the heat transfer member 3 is laminated, the peripheral edges of the opening portions 10a, 11a, 12a, and 13a of the cup portions 10 to 13 adjacent in the laminating direction come into contact with each other. In this state, when the peripheral edges of the openings 10a, 11a, 12a, and 13a adjacent to each other in the stacking direction are joined, the windward upper space arranged in the stacking direction communicates with each other via the openings 10a, 11a, 12a, and 13a. The tank 23 is configured, the leeward upper space communicates to form the leeward upper tank 24, the windward lower space communicates to the windward lower tank 25, and the leeward lower space communicates to the leeward side. A lower tank 26 is configured.

  Further, as shown in FIG. 5, a fin 4 is disposed at the left end of the cooling heat exchanger 1, and the end plate 6 is joined to the left side of the fin 4. Similarly, the fin 4 is arranged at the right end of the cooling heat exchanger 1, and the end plate 6 is joined to the right side thereof.

  As shown in FIG. 6, a refrigerant introduction pipe portion 27 is provided at the right end portion of the leeward side upper tank 24. A refrigerant outlet pipe 28 is provided at the right end of the windward upper tank 23. An expansion valve block (not shown) incorporating an expansion valve as a decompression means is connected to the introduction pipe portion 27 and the outlet pipe portion 28. The high-pressure liquid refrigerant generated through the compressor and the condenser outside the figure is decompressed through the expansion valve block and introduced into the cooling heat exchanger 1 from the introduction pipe portion 27, and the cooling heat The refrigerant in the exchanger 1 is led out to the outside from the lead-out pipe portion 28 through the expansion valve block.

  Of the heat transfer members 3 stacked in the left-right direction, the forming plate 2a of the heat transfer member 3a located on the right side of the cooling heat exchanger 1 has the windward upper cup portion 10 and the leeward upper cup portion 11 on the molding plate 2a. Openings 10a and 11a are not formed. As shown in FIG. 9, the windward upper tank 23 and the leeward upper tank 24 are partitioned into left space 23a, 24a and right space 23b, 24b, respectively, at the right side by the heat transfer member 3a located on the right side. ing. Of the heat transfer members 3 stacked in the left-right direction, the molding plate 2b of the heat transfer member 3b located on the left side of the cooling heat exchanger 1 has an upwind lower cup portion 12 and a leeward lower cup portion 13. The openings 12a and 13a are not formed. By the heat transfer member 3b located on the left side, the windward lower tank 25 and the leeward lower tank 26 are partitioned into left space 25a, 26a and right space 25b, 26b, respectively, on the left side.

  Further, the gap between the windward lower cup portion 12 and the leeward lower cup portion 13 of the molding plate 2c constituting the heat transfer member 3c located on the left side of the heat transfer member 3b located on the left side is cut out. It has a shape. As shown in FIG. 6 (b), the cutout portion forms a communication passage 30 that connects the windward lower space and the leeward lower space of the heat transfer member 3c. The left space 25 a of the leeward lower tank 25 and the left space 26 a of the leeward lower tank 26 communicate with each other via the communication path 30.

  Next, the flow of the refrigerant in the cooling heat exchanger 1 configured as described above will be described with reference to FIG. First, the refrigerant introduced into the right space 24 b of the leeward upper tank 24 from the introduction pipe portion 27 flows into the refrigerant passage 8 communicating with the right space 24 b and flows downward, and the right space 26 b of the leeward lower tank 26. Flow into. The refrigerant path 8 that communicates with the right space 24b of the leeward upper tank 24 constitutes a first path P1 that is located at the most upstream side in the refrigerant flow direction.

  The refrigerant flowing into the right space 26b of the leeward lower tank 26 flows to the left, flows into the refrigerant passage 8 between the heat transfer member 3a and the heat transfer member 3b, flows upward, and the left space of the leeward upper tank 24. It flows into 24a. A second path P2 is configured by the refrigerant passage 8 between the heat transfer member 3a and the heat transfer member 3b.

  The refrigerant that has flowed into the left space 24a of the leeward upper tank 24 flows to the left, flows into the refrigerant passage 8 that communicates with the left space 26a of the leeward lower tank 26, flows downward, and flows into the left space of the leeward lower tank 26. 26a. A third path P3 is constituted by the refrigerant passage 8 communicating with the left space 26a of the leeward lower tank 26.

  The refrigerant flowing into the left space 26a of the leeward lower tank 26 flows into the left space 25a of the windward lower tank 25 through the communication passage 30, flows into the refrigerant passage 7 communicating with the left space 25a, and flows upward. Then, it flows into the left space 23 a of the windward upper tank 23. A fourth path P4 is formed by the refrigerant passage 7 communicating with the left space 25a of the upwind lower tank 25.

  The refrigerant that has flowed into the left space 23a of the windward upper tank 23 flows to the right, flows into the refrigerant passage 7 between the heat transfer member 3a and the heat transfer member 3b, flows downward, and flows to the right of the windward lower tank 25. It flows into the space 25b. The refrigerant path 7 between the heat transfer member 3a and the heat transfer member 3b constitutes a fifth path P5.

  The refrigerant that has flowed into the right space 25b of the windward lower tank 25 flows to the right, flows into the refrigerant passage 7 that communicates with the right space 23b of the windward upper tank 23, flows upward, and flows into the right space of the windward upper tank 23. 23b. A sixth path P <b> 6 is configured by the refrigerant passage 7 that communicates with the right space 23 b of the upwind upper tank 23. The refrigerant that has flowed into the right space 23 b of the windward upper tank 23 is led out to the outside from the lead-out pipe portion 28.

  As shown in FIGS. 10 and 11, an upper seal member 40, a lower seal member 41, a right seal member 42 and a left seal member 43 are provided on the upper, lower, left and right sides of the cooling heat exchanger 1. Each is provided. The sealing members 40 to 43 allow the air-conditioning air introduced into the casing 101 to leak downstream from between the outer peripheral portion of the cooling heat exchanger 1 and the holding portions 107, 113, 114, 115 of the casing 101. For example, it is made of an elastically deformable foamed resin material such as foamed polyethylene.

  The upper seal member 40 is formed so as to extend from the windward side upper surface of the windward upper tank 23 to the upper surface and then extend from the upper surface of the leeward upper tank 24 to the leeward side surface of the leeward upper tank 24. ing. The upper seal member 40 covers substantially the entire leeward upper tank 23 and leeward upper tank 24. The upper seal member 40 is attached to the windward upper tank 23 and the leeward upper tank 24. The upper surface of the upper seal member 40 is in contact with the upper holding portion 115 of the casing 101.

  The lower seal member 41 is formed so as to extend from the windward surface of the leeward lower tank 25 to the lower surface and the lower surface of the leeward lower tank 26 to reach the leeward surface of the leeward lower tank 26. . An opening 45 extending in the left-right direction is formed at a portion of the lower seal 41 facing the lower end surfaces of the lower tanks 25 and 26. A gap between the windward lower cup part 12 and the leeward lower cup part 13 is located immediately above the opening 45.

  The lower seal member 41 is formed with a notch 46 having a shape extending from the leeward side to the lower side of the lower seal member 41. The notch 46 is continuous with the opening 45. The notch 46 is shaped to expose only a predetermined region of the leeward lower tank 26, that is, a portion corresponding to the second path P <b> 2 in the lower tank 26. The lower seal member 41 is attached to the leeward lower tank 25 and the leeward lower tank 26. The lower surface of the lower seal member 41 is in contact with the lower holding portion 107. Therefore, the portion of the leeward lower tank 26 exposed from the lower seal member 41 is in a state of being separated from the rear side portion 108 and the first rib 109 of the lower holding portion 107.

  The right seal member 42 and the left seal member 43 are formed so as to cover the end plate 6 and are attached to the end plate 6. The right side seal member 42 and the left side seal member 43 are in contact with the right side holding part 113 and the left side holding part 114. The upper seal member 40, the lower seal member 41, the right side seal member 42, and the left side seal member 43 may be integrated without being separated.

  A temperature sensor S (shown only in FIGS. 5 and 10) is attached to the lower part of the cooling heat exchanger 1 on the leeward side. The temperature sensor S detects the surface temperature of the heat transfer member 3 and the fins 4 and is connected to a control device (not shown) that controls the operating state of the refrigeration apparatus. The control device basically controls the operation state of the refrigeration apparatus corresponding to the air conditioning mode set by the passenger. For example, when the temperature detected by the temperature sensor S is close to the freezing temperature of the condensed water, Regardless of the air conditioning mode, the compressor is stopped to stop the operation of the refrigeration system.If the temperature is higher than the freezing temperature of the condensed water and the condensed water does not freeze, the compressor is It is configured to operate and operate the refrigeration apparatus. That is, the refrigeration apparatus is intermittently operated according to the surface temperatures of the heat transfer member 3 and the fins 4.

  A turbulent flow is formed by the bulging portion 20 of the heat transfer member 3 in the refrigerant flowing through the first path P1 to the sixth path P6 of the cooling heat exchanger 1. This turbulent flow enables the refrigerant in the refrigerant passages 7 and 8 to exchange heat substantially uniformly with the external air.

  Further, since the seal members 40 to 43 are disposed between the outer peripheral portion of the cooling heat exchanger 1 and the holding portions 115, 107, 113, 114 of the casing 101, the air conditioning introduced into the casing 101. Almost all of the working air passes through the cooling heat exchanger 1. Thereby, it becomes possible to cool air-conditioning air efficiently.

  When the air for air conditioning is cooled, condensed water is generated on the surfaces of the heat transfer member 3 and the fins 4. Since the heat transfer member 3 extends substantially in the vertical direction, the condensed water flows below the cooling heat exchanger 1 through the heat transfer member 3. The condensed water that flows downward falls from the gap between the lower cup portions 12 and 13 to the lower wall portion 104a of the casing 101 through the opening 45 of the lower seal member 41 and is discharged out of the casing 101.

  Moreover, since the relatively low-temperature air cooled by passing through the leeward side of the cooling heat exchanger 1 flows on the leeward side of the lower part of the cooling heat exchanger 1, the leeward side of the cooling heat exchanger 1 The temperature on the side tends to be lower than that on the windward side. Therefore, the leeward side of the cooling heat exchanger 1 is in a temperature state in which condensed water is more likely to freeze than the leeward side.

  In this cooling heat exchanger 1, the leeward side in the lower part is exposed by the notch 46 of the lower seal member 41. For this reason, the condensed water is drained below the cooling heat exchanger 1 through the portion exposed from the seal member 41 of the cooling heat exchanger 1. Thereby, it becomes difficult for condensed water to accumulate in the part which becomes easy to become the low temperature of the heat exchanger 1 for cooling.

  In addition, a refrigerant having a large amount of liquid component immediately after passing through the expansion valve flows into the first path P1 of the heat exchanger 1 for cooling. The refrigerant in the first path P1 evaporates by exchanging heat with air-conditioning air while flowing through the first path P1, and the liquid component in the refrigerant decreases and the gas component increases. When this gas component increases, the pressure loss of the refrigerant increases, and accordingly, the evaporation pressure decreases and the evaporation temperature decreases. Therefore, the evaporation temperature in the second path P2 adjacent to the first path P1 becomes relatively low. As a result, the surface temperature of the heat transfer member 3 constituting the second path P2 is lower than the surface temperature of the heat transfer member 3 constituting the first path P1. Since the notched portion 46 of the lower seal member 41 is set so as to correspond to the portion where the surface temperature becomes low, it is possible to reliably reduce the condensed water accumulated in the portion of the cooling heat exchanger 1 that tends to become low temperature. It becomes possible.

  Further, as described above, only a part of the leeward side in the lower part of the cooling heat exchanger 1 is exposed by the notch 46 of the lower seal member 41, so that the part other than the exposed part and the lower holding of the casing 101 are retained. The seal member 41 is disposed between the portion 107. As described above, the sealing member 41 is also arranged on the leeward side in the lower portion of the cooling heat exchanger 1, so that a wide portion in the lower portion of the cooling heat exchanger 1 is placed on the lower holding portion 107 via the lower sealing member 41. It becomes possible to hold on. Thereby, since the heat exchanger 1 for cooling is stabilized, shakiness of the heat exchanger 1 for cooling when the lower seal member 41 changes with time is suppressed.

  Therefore, according to the vehicle air conditioner according to this embodiment, the outer peripheral portion of the cooling heat exchanger 1, the upper holding portion 115, the lower holding portion 107, the right holding portion 113, the left holding portion 114 of the casing 101, Since the upper seal member 40, the lower seal member 41, the right seal member 42, and the left seal member 43 are respectively disposed between the two, the air conditioning air can be efficiently cooled by suppressing leakage of the air conditioning air. . Furthermore, since the shape of the lower seal member 41 is a shape that exposes the leeward side of the lower portion of the cooling heat exchanger 1, the condensed water is less likely to accumulate in the portion of the cooling heat exchanger 1 that tends to be low in temperature. Freezing of water is suppressed, and the operation time of the refrigeration apparatus can be extended. Thereby, air-conditioning performance can be improved.

  Further, since the notch 46 is formed in the lower seal member 41 so that the lower portion of the cooling heat exchanger 1 is exposed, the lower seal member 41 can be easily manufactured.

  In addition, since only a part of the leeward side of the lower part of the cooling heat exchanger 1 is exposed from the lower seal member 41, the rattling of the cooling heat exchanger 1 changes when the lower seal member 41 changes over time. As a result, it is possible to ensure sealing performance and prevent the generation of abnormal noise.

  Further, since the notch 46 of the lower seal member 41 is formed so as to correspond to the second path P2 adjacent to the first path P1 on the most upstream side, the portion where the condensed water tends to become a low temperature of the heat exchanger 1 for cooling. It is possible to reliably reduce the amount of condensed water accumulated in the water.

  Moreover, since the opening part 45 was formed in the lower seal member 41, the drainage property of condensed water can be made favorable.

  Further, since the sealing members 40 to 43 are attached to the cooling heat exchanger 1, the sealing members 40 to 43 can be easily fixed without being displaced with respect to the cooling heat exchanger 1, and manufactured. Cost can be reduced.

  In addition, since the sealing members 40 to 43 are made of foamed polyethylene that can be elastically deformed, for example, when the vehicle is running, the cooling heat exchanger 1 and the casing 101 vibrate and their relative positions change. The sealing members 40 to 43 are deformed so as to follow the change in the relative position, and the sealing performance between the outer peripheral portion of the cooling heat exchanger 1 and the holding portions 115, 107, 113, 114 of the casing 101 is ensured. The air for air conditioning can be prevented from leaking from the outer peripheral portion of the heat exchanger 1 for cooling.

  In addition, although this embodiment demonstrated the case where the air conditioner was divided | segmented into the ventilation unit and the air conditioning unit 100, the air conditioner was integrated type which accommodated the heat exchanger, the ventilation fan, etc. in one casing, for example. It may be.

  Moreover, you may comprise the sealing members 40-43 with foamed resin materials other than foamed polyethylene.

  Further, the cooling heat exchanger 1 may be constituted by a plurality of tubes and a header tank communicating with the end portions of the tubes without being constituted by the molding plate 2.

  In this embodiment, three paths P1 to P3 and P4 to P6 are provided on the windward side and leeward side of the cooling heat exchanger 1, respectively, but the number of paths is not limited to this, and the transmission is not limited to this. It can be arbitrarily changed by changing the arrangement of the heat members 3a and 3b and the position where the communication passage 30 is formed. In this embodiment, the refrigerant passages 7 and 8 are provided in two rows in the flow direction of the air-conditioning air, but the refrigerant passage may be in one row in the flow direction of the air-conditioning air, or in three or more rows. There may be.

  As described above, the vehicle air conditioner according to the present invention is suitable for an apparatus in which a cooling heat exchanger composed of an evaporator of a refrigeration apparatus is accommodated and held in a casing.

It is the side view which looked at the lower half part of the air-conditioning unit concerning the embodiment of the present invention from the right side. FIG. 2 is a view corresponding to FIG. 1 with an upper case constituent member of the air conditioning unit removed. It is a top view of the front half part of a lower case component member (A) is the sectional view on the AA line of FIG. 3, (b) is the sectional view on the BB line of FIG. It is the figure which looked at the heat exchanger for cooling before sticking a sealing member from the flow direction downstream of the air for air conditioning. The heat exchanger for cooling before sticking a sealing member is shown, (a) is a top view, (b) is a bottom view. (A) is sectional drawing of the heat-transfer member corresponded to the AA line of FIG. 8, (b) is sectional drawing of the heat-transfer member corresponded to the BB line of FIG. It is a side view of a shaping | molding plate. It is the schematic which shows the flow of the refrigerant | coolant in the inside of the heat exchanger for cooling. FIG. 6 is a view corresponding to FIG. 5 in a state where a seal member is attached. FIG. 7 is a view corresponding to FIG. 6 in a state where a seal member is attached.

DESCRIPTION OF SYMBOLS 1 Cooling heat exchanger 40 Upper seal member 41 Lower seal member 42 Right side seal member 43 Left side seal member 45 Opening part 46 Notch part 101 Casing 107 Lower side holding part 113 Right side holding part 114 Left side holding part 115 Upper side holding part P1-P6 1st to 6th passes

Claims (1)

A casing into which air for air conditioning is introduced;
A vehicle air conditioner including a cooling heat exchanger that is housed in the casing and that cools the air conditioning air introduced into the casing through the air,
The cooling heat exchanger is provided with a plurality of paths through which the refrigerant flows in order so as to line up in a direction intersecting the air-conditioning air passage direction,
A high-pressure refrigerant is introduced into the uppermost stream side path in the refrigerant flow direction through the decompression means, and the refrigerant flows to the downstream path in the refrigerant flow direction.
The cooling heat exchanger is disposed such that the air-conditioning air passage surface extends substantially vertically.
In the casing, a holding portion for holding the outer periphery of the cooling heat exchange is provided,
A seal between the holding part and the outer peripheral part of the cooling heat exchanger that suppresses air-conditioning air from leaking from the gap between the holding part and the outer peripheral part of the cooling heat exchanger to the leeward side in the casing. A member is provided, and the sealing member is attached to the cooling heat exchanger,
The aforementioned sealing member, together with the notch to expose the leeward side in the lower part of the cooling heat exchanger is formed, an opening in a portion of the lower end surface facing the said cooling heat exchanger is continuous with the cutout part Formed,
The vehicle air conditioner , wherein the notch is disposed so as to correspond to a path adjacent to the downstream side of the most upstream path in the refrigerant flow direction .

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