JP2018096592A - Cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooler capable of sufficiently removing frost adhering to a heat transfer surface of a heat exchanger, and suppressing enlargement.SOLUTION: A cooler 100 includes: a heat exchanger 1 including a flow passage for passing refrigerant; a blower fan 2 configured to feed wind W0 for removing frost adhering to a heat transfer surface 13 of the heat exchanger 1; and a flat plate-like member 3 provided so as to be opposite to the heat transfer surface 13 with a predetermined interval. The flat plate-like member 3 has a plurality of hole parts 3a for passing wind, which is incident to the hole parts so as to cross with the heat transfer surface 13 after being fed out by the blower fan 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cooler, and more particularly to a cooler including a blower fan that sends out wind for removing frost attached to a heat transfer surface of a heat exchanger.

  2. Description of the Related Art Conventionally, a cooler including a nozzle that sends out air for removing frost attached to a heat transfer surface of a heat exchanger is known (see, for example, Patent Document 1).

  Patent Document 1 discloses a heat exchanger in which a plurality of fins are joined to a heat transfer tube (heat transfer surface) through which a refrigerant passes, and air that is perpendicular to or parallel to the heat transfer surface of the fins. Disclosed is a frost reduction device for a cooler comprising a plurality of nozzles for removing frost ejected and adhering to fins and heat transfer tubes, and drive means for moving the plurality of nozzles relative to the plurality of fins. Yes. Here, the heat transfer tube has a relatively thin tube shape and has a shape folded back so as to meander. The fin has a flat plate shape. A plurality of fins are provided at intervals so as to be parallel to each other. And it is comprised so that the heat exchanger tube folded back so that it may meander may penetrate the several fin provided in the space | interval so that it might become mutually parallel. Then, the plurality of nozzles ejects air along the heat transfer surface of the flat plate-shaped fins provided at intervals so as to be parallel to each other so as to remove frost attached to the fins and the heat transfer tubes. It is configured.

JP 2008-64326 A

  However, in the cooler described in the above-mentioned Patent Document 1, when air is ejected along the heat transfer surface of the fin, the separation flow due to wall friction with respect to the heat transfer surface (wall surface) (the air flow is separated) ) And resistance increases. For this reason, the wind pressure to frost becomes small. As a result, in addition to the device configuration by providing the nozzle and the nozzle driving means, it is necessary to further provide ancillary equipment (blower compressor and air tank) for supplementing the wind pressure with respect to the nozzle, which increases the size of the device. There is a problem that.

  The present invention has been made to solve the above-mentioned problems, and one object of the present invention is to increase the size while sufficiently removing frost attached to the heat transfer surface of the heat exchanger. It is providing the cooler which can be suppressed.

  A cooler according to one aspect of the present invention includes a heat exchanger that includes a flow path for allowing a refrigerant to pass therethrough, a blower fan that sends out wind for removing frost attached to the heat transfer surface of the heat exchanger, A flat plate-like member provided so as to face the heat transfer surface at a predetermined interval, and the flat plate member is sent by the blower fan and then enters the heat transfer surface so as to intersect the heat transfer surface. Including a plurality of holes for passing the.

  In the cooler according to one aspect of the present invention, as described above, a plurality of holes for allowing the plate-like member to pass through the air flowing in so as to intersect the heat transfer surface after being sent out by the blower fan. Is configured to include. As a result, a plurality of impinging jet flows that collide against the heat transfer surface through the plurality of holes due to the wind incident so as to intersect the heat transfer surface are generated. Can be bigger. Thereby, the frost adhering to the heat-transfer surface of a heat exchanger can fully be removed, without providing incidental facilities (for example, a ventilation compressor and an air tank) for supplementing a wind pressure separately. That is, it is possible to suppress an increase in size of the cooler while sufficiently removing frost attached to the heat transfer surface of the heat exchanger.

  In the cooler according to the above aspect, the blower fan is preferably provided so as to send air in the first direction along the heat transfer surface of the heat exchanger, and is downstream of the heat transfer surface in the first direction. And a wind guide member for passing the wind sent by the blower fan through the plurality of holes provided in the flat plate-like member so as to cross the heat transfer surface. . If comprised in this way, even if the wind sent out by the blower fan is in the direction along the heat transfer surface, the air can be guided by the air guide member so as to intersect the heat transfer surface. The frost adhering to the hot surface can be effectively removed.

  In the cooler according to the above aspect, the air guide member is preferably connected to the downstream end of the flat plate member in the first direction and orthogonal to the surface of the flat plate member extending in the first direction. The first air guide member is provided so as to extend along the second direction and guides the air so as to cross the heat transfer surface, and is connected to the upstream end portion of the flat plate member in the first direction. A second member is provided to extend along a third direction opposite to the second direction orthogonal to the surface of the flat plate member extending in the first direction, and to block incident wind along the heat transfer surface. A wind guide member. If comprised in this way, since the wind of the direction in alignment with the heat-transfer surface sent out from the ventilation fan can be guided in the direction which cross | intersects with respect to a heat-transfer surface by a 1st air guide member, it is Frost adhering to can be sufficiently removed by wind (air flow). Further, the second wind guide member can block the wind sent from the blower fan from flowing directly between the heat transfer surface and the flat plate member. Thereby, the flow direction of the wind incident (inflowing) so as to intersect the heat transfer surface that has passed through the hole of the flat plate member is the flow of the wind directly flowing between the heat transfer surface and the flat plate member. It can suppress that it is changed by.

  In the cooler according to the above aspect, the flat plate member and the air guide member are preferably formed integrally. If comprised in this way, a flat plate member and an air guide member can be easily formed only by bending one plate-shaped member. Further, unlike the case where the flat plate member and the air guide member are provided separately, it is possible to suppress an increase in the number of parts. Further, since the flat plate member and the air guide member are integrally formed, the flat plate member and the air guide member are fixed at a desired position without individually supporting the flat plate member and the air guide member. be able to.

  In the cooler according to the above aspect, the heat transfer surface of the heat exchanger is preferably a first heat transfer surface disposed so as to face each other in a direction intersecting with a direction in which wind is sent out by the blower fan. The flat plate member includes a second heat transfer surface, and the flat plate member is predetermined with respect to the first heat transfer surface with a predetermined distance from the first flat plate member and the second heat transfer surface. And a second flat plate-like member provided so as to be opposed to each other with a gap therebetween. If comprised in this way, the wind sent from the ventilation fan along the 1st heat transfer surface and the 2nd heat transfer surface which are arrange | positioned so that it may mutually oppose may be made into the 1st heat transfer surface and the 2nd heat transfer surface. The air can be easily guided so as to intersect the hot surface. As a result, frost attached to each of the first heat transfer surface and the second heat transfer surface can be effectively removed.

  In the cooler according to the above aspect, the heat exchanger is preferably configured to have a flat shape and a plurality of flow paths through which the refrigerant flows. If comprised in this way, since a heat-transfer surface can be made comparatively large, it is not necessary to provide the fin for cooling etc. in a heat-transfer surface separately. Thereby, the structure of a cooler can be simplified.

  The cooler according to the above aspect preferably further includes a discharge mechanism that is disposed below the heat transfer surface and accumulates frost removed from the heat transfer surface and discharges the frost to the outside. If comprised in this way, since the accumulated frost is partly melted in the discharge mechanism and can be made into ice water and discharged outside the cooler, it is discharged outside the cooler in the form of frost. Unlike the case, the removed frost (ice water) can be easily treated.

  According to the present invention, as described above, an increase in size can be suppressed while sufficiently removing frost attached to the heat transfer surface of the heat exchanger.

It is the figure which showed the structure of the air cooler by 1st Embodiment of this invention. It is the figure which showed the cross section of the heat exchanger of the air cooler by 1st Embodiment of this invention. It is a figure for demonstrating the flow of the wind at the time of the defrost of the air cooler by 1st Embodiment of this invention, and cooling. It is the figure which showed the discharge mechanism by 1st Embodiment of this invention. It is a figure for demonstrating the peeling flow which arises when a wind is entered along the heat-transfer surface (wall surface) by a comparative example. It is the figure which showed the structure of the air cooler by 2nd Embodiment of this invention. It is the figure which showed the cross section of the heat exchanger of the air cooler by 2nd Embodiment of this invention. It is a figure for demonstrating the flow of the wind at the time of the defrost of the air cooler by 2nd Embodiment of this invention, and cooling. It is the figure which showed the structure of the air cooler by 3rd Embodiment of this invention, and the flow of the air at the time of defrosting. It is the figure which showed the flat member and the baffle member by the modification of the air cooler by 2nd Embodiment of this invention. It is the figure which showed the fine uneven structure of the heat-transfer surface by the modification of the air cooler by 1st-1st embodiment of this invention.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

(First embodiment)
First, with reference to FIGS. 1-5, the structure of the air cooler 100 by 1st Embodiment is demonstrated. The air cooler 100 is an example of the “cooler” in the present invention. The air cooler 100 is used, for example, as a unit cooler for cooling a refrigerated (refrigerated) warehouse.

  As shown in FIG. 1, the air cooler 100 includes a heat exchanger 1 that includes therein a flow path 1a (see FIG. 2) for allowing a refrigerant to pass therethrough. The heat exchanger 1 constitutes a refrigeration cycle with a compressor, a condenser, and an expansion valve (not shown), and a low-temperature refrigerant is caused to flow through the flow path 1a so as to pass through the heat transfer surface 13 and the heat transfer surface 130. Thus, the air in the air cooler 100 is cooled. Further, the heat exchanger 1, the blower fan 2, the flat plate member 3, and the air guide member 4 are housed inside the housing C. In FIG. 1, the blower fan 2 is disposed outside the housing C, but in reality, the blower fan 2 is disposed inside the housing C.

  Here, in 1st Embodiment, while the heat exchanger 1 has a flat shape, it has the some flow path 1a (refer FIG. 2) into which a refrigerant | coolant flows inside. Specifically, the refrigerant flows from the direction P1 (Z2 direction) at the end 11 of the heat exchanger 1, and passes through the inside of the flat portion (channel 1a) having a plurality of channels 1a through which the refrigerant flows. It flows while turning back (meandering) in the Y1 direction and the Y2 direction, and flows out in the direction P2 (Z1 direction) at the end 12 of the heat exchanger 1. The flat portion includes a plurality of semicylindrical folded portions and a flat region sandwiched between the folded portions, and the flat regions are arranged at substantially equal intervals in the X direction (X1 and X2 directions). It is out. Thus, the heat exchanger 1 includes a flat porous tube (microchannel) having a plurality of flow paths 1a inside.

  As shown in FIG. 2 (a), the heat transfer surfaces 13 and 130, which are one surface of the flat region of the flat shape, have a fine concavo-convex structure (for example, concavo-convex with a width and depth of about 1/10 mm in the number of digits) Pattern). Further, as shown in FIGS. 2A and 2B, each of the heat transfer surfaces 13 and 130 is repeatedly provided with recesses (grooves) extending in the Y direction and the Z direction, respectively, and is minutely surrounded by the recesses. The convex portions 13a and 130a (for example, a rectangular convex portion as shown in FIG. 2B) are configured to appear periodically in the Y direction and the Z direction. Thereby, it is possible to easily create the heat transfer surfaces 13 and 130 having optimum sizes with respect to the dimensional changes in the Y direction and the X direction. Moreover, as for the convex part 13a, groove pitch (interval) and the depth of a groove | channel are about several hundred micrometers, for example. Since the fine concavo-convex structure causes the frost F (or dew condensation caused by subcooled water droplets) to concentrate on and adhere to the convex portion (grow from the convex portion), the frost F is attached to the heat transfer surfaces 13 and 130. Attaching power is reduced, and the amount and thickness of frost F can be reduced. Thereby, the frost F can be easily removed by the wind W2 (described later) incident so as to intersect (substantially orthogonally) the heat transfer surface 13 after being sent out by the blower fan 2 described later. Further, as shown in FIG. 3, the heat transfer surface 13 and the heat transfer surface 130 are provided on both sides of the flat portion (the front side and the back side of the flat portion, or the X1 direction side and the X2 direction side). They are parallel to the direction and arranged at equal intervals alternately.

  In addition, the air cooler 100 includes a blower fan 2 that sends out wind for removing frost F adhering to the heat transfer surfaces 13 and 130 of the heat exchanger 1. As shown in FIG. 1, the blower fan 2 sends the wind W0 toward the heat exchanger 1 in the Z1 direction, which is a direction along the heat transfer surfaces 13 and 130. In addition, the ventilation fan 2 is comprised so that reverse rotation is possible. As will be described later, the rotation direction of the blower fan 2 is reversed between defrosting and cooling. At this time, the direction of the wind W0 is also the opposite Z2 direction. The Z1 direction is an example of the “first direction” in the claims.

  In addition, the air cooler 100 includes a flat plate-like member 3 provided so as to face the heat transfer surfaces 13 and 130 at a predetermined interval (substantially parallel). Here, in 1st Embodiment, as shown to Fig.3 (a) (cross section in the XY plane of the air cooler 100), the flat member 3 is the heat-transfer surface 13 after sending out with the ventilation fan 2. As shown in FIG. A plurality of circular holes 3a for allowing the wind W2 incident so as to intersect with each other is passed. The wind that has passed through the hole 3 a moves so as to collide with the heat transfer surface 13.

  Moreover, in 1st Embodiment, the air cooler 100 is provided with the baffle member 4 for guiding the wind sent out by the ventilation fan 2 so that it may cross | intersect with respect to the heat-transfer surface 13. FIG. The air guide member 4 is provided so as to extend along the X1 direction orthogonal to the surface of the flat plate member 3 that is connected to the downstream end of the flat plate member 3 in the Z1 direction and extends in the Z1 direction. A first air guide member 41 for introducing air so as to intersect the heat transfer surface 13 is included. The air guide member 4 is connected to the upstream end of the flat plate member 3 in the Z1 direction and extends in the X2 direction opposite to the X1 direction orthogonal to the surface of the flat plate member 3 extending in the Z1 direction. A second air guide member 42 that is provided so as to extend along the heat transfer surface 13 and shields the wind W <b> 0 incident along the heat transfer surface 13. The X2 direction is an example of the “second direction” in the claims. The X1 direction is an example of the “third direction” in the claims.

  The flat plate member 3 and the air guide member 4 (the first air guide member 41 and the second air guide member 42) are provided between the flat regions of the heat exchanger 1 having a meandering folded shape. .

  In the first embodiment, the flat plate member 3 and the air guide member 4 are integrally formed. For example, the flat plate member 3 and the air guide member 4 are formed by bending a single metal plate. Further, before the flat member 3 and the air guide member 4 are bent, a hole 3a is formed in a desired position in advance. Therefore, a plurality of holes 3a are formed in a region functioning as the flat plate member 3 at a size and interval necessary and sufficient to change the wind W1 into the wind W2 that is a collision jet flow. On the other hand, no hole is formed in the region functioning as the air guide member 4. Further, the flat plate member 3 and the air guide member 4 are made of a metal having a high heat transfer property so that the flat plate member 3 and the air guide member 4 themselves also serve as a heat absorbing plate that absorbs heat from the air in the air cooler 100. For example, aluminum, copper, and a metal coated with polytetrafluoroethylene are used.

  Moreover, in 1st Embodiment, as shown in FIG. 4, the discharge mechanism 5 arrange | positioned under the heat-transfer surface 13 and accumulating the frost F removed from the heat-transfer surface 13 and discharging | emitting outside is provided. It has been. The discharge mechanism 5 includes a frost receiving part 51 and a discharge pipe part 52. The frost F accumulated from the frost receiving part 51 is discharged through the discharge pipe part 52. Specifically, the frost F (including condensation) peeled off or slid down by the wind (airflow) is accumulated in the frost receiving part 51, partially melted, and discharged from the discharge pipe part 52. Thereby, it is not necessary to separately provide a heater for melting the defrosted frost F, a pump for discharging the defrosted frost F, and the like. Further, the heat exchanger 1 and the discharge mechanism 5 are arranged in a separated state. And the wind which removed the frost F is escaped from the clearance gap A between the heat exchanger 1 and the discharge mechanism 5. FIG. Further, outside air is taken in from the gap A during cooling (described later). The discharged ice water (frost F and melted water) can be reused as a cooling heat source.

  Next, the operation at the time of operation of the air cooler 400 will be described while comparing with the air cooler 400 according to the comparative example in which the flat plate member 3 and the air guide member 4 are not provided.

  As shown in FIG. 5, in the air cooler 400 according to the comparative example in which the flat plate member 3 and the air guide member 4 are not provided, even if the wind W7 flows in the direction along the heat transfer surface S to which the frost F is attached. Then, a separation flow V (such as a small vortex-like turbulent flow) is generated due to friction of the heat transfer surface S (wall surface), and the resistance to the wind W7 increases. For this reason, sufficient wind pressure with respect to the frost F cannot be obtained. Therefore, the frost F cannot be removed sufficiently.

  Next, the operation at the time of defrosting of the air cooler 100 of the first embodiment will be described.

  In the air cooler 100, the wind W0 sent out by the blower fan 2 flows as wind W1 (main air) between the plurality of second air guide members 42 as shown in FIG. The first air guide member 41 (air guide member 4) passes the plurality of holes 3 a provided in the flat plate member 3 through the air W 1 and becomes the air W 2 that intersects the heat transfer surface 13. To guide. The bundles of the plurality of winds W2 that have passed through the hole 3a of the flat plate member 3 become collision jet flows that are incident on the heat transfer surface 13 so as to intersect each other. The wind W2 collides with the heat transfer surface 13 and blows away the frost F (or condensation due to the supercooled water droplets) adhering to the heat transfer surface 13, and then flows out with the frost F as the wind W3. Here, the collision jet flow incident and colliding so as to cross the heat transfer surface 13 flows from the blower fan 2 along the heat transfer surface 13 and hits the frost F (air cooler of a comparative example) 400, see FIG. 5), the wind pressure against the frost F is increased. Thereby, even if it is the uncompressed wind W0 by the ventilation fan 2, since sufficient wind pressure can be obtained, the frost F can be fully removed.

  Next, the operation at the time of cooling the air cooler 100 will be described. By rotating the blower fan 2 in the opposite direction to that during defrosting, wind (airflow) in the Z2 direction is generated as shown in FIG. 3B, and warm air that enters from the outside of the air cooler 100 is stored. (Air) W4 comes into contact with the heat transfer surfaces 13 and 130 and is cooled to form a bundle of a plurality of winds W5 passing through the plurality of holes 3a. Then, the wind W5 is merged to become the wind W6, and blown out by the blower fan 2 to cool the outside. The wind W6 blows off and removes the frost F (or dew condensation caused by supercooled water droplets) that collides with the heat transfer surface 130 and adheres to the heat transfer surface 130.

(Effect of 1st Embodiment)
In the first embodiment, the following effects can be obtained.

  In the first embodiment, as described above, the flat member 3 is passed through the wind W2 that is incident so as to intersect (substantially orthogonally) the heat transfer surface 13 after being sent out by the blower fan 2. It comprises so that the some hole part 3a may be included. As a result, a plurality of collision jet flows that pass through the plurality of holes 3a and collide with the heat transfer surface 13 are generated by the wind W2 flowing so as to intersect (substantially orthogonal) to the heat transfer surface 13. Therefore, the wind pressure with respect to the frost of the ventilation fan 2 can be enlarged. Thereby, the frost F adhering to the heat transfer surface 13 of the heat exchanger 1 can be sufficiently removed without separately providing incidental equipment (for example, a blower compressor or an air tank) for compensating the wind pressure. That is, the air cooler 100 can be prevented from increasing in size while sufficiently removing the frost F adhering to the heat transfer surface 13 of the heat exchanger 1.

  Moreover, in 1st Embodiment, as mentioned above, the ventilation fan 2 is provided so that a wind may be sent in the Z1 direction (1st direction) along the heat transfer surface 13 of the heat exchanger 1, and the heat transfer surface 13 of The wind W0 (wind W1), which is disposed downstream of the Z1 direction (first direction) and is sent out by the blower fan 2, passes through the plurality of holes 3a provided in the flat plate member 3, and passes through the heat transfer surface 13. A wind guide member 4 is provided to guide the wind so as to intersect (substantially orthogonal) with respect to. Thereby, even when the wind W0 sent out by the blower fan 2 is in the direction along the heat transfer surface 13, the wind guide member 4 guides the air so as to intersect (substantially orthogonal) to the heat transfer surface 13. Therefore, the frost F adhering to the heat transfer surface 13 can be effectively removed.

  In the first embodiment, as described above, the air guide member 4 is connected to the downstream end of the flat plate member 3 in the Z1 direction (first direction) and in the Z1 direction (first direction). A first guide is provided to extend along the X2 direction (second direction) orthogonal to the surface of the extending flat plate-shaped member 3 and to guide the air so as to intersect (substantially orthogonal) the heat transfer surface 13. The wind member 41 and the X2 direction orthogonal to the surface of the flat plate member 3 connected to the upstream end of the flat plate member 3 in the Z1 direction (first direction) and extending in the Z1 direction (first direction) ( A second air guide member 42 that is provided so as to extend along the X1 direction (third direction) opposite to the second direction and that blocks incident wind along the heat transfer surface 13. If comprised in this way, the wind W0 of the direction along the heat-transfer surface 13 sent out from the ventilation fan 2 will be guide | induced to the direction which cross | intersects (substantially orthogonal) with respect to the heat-transfer surface 13 by the 1st air guide member 41. Since it can wind, the frost F adhering to the heat transfer surface 13 can be sufficiently removed by wind (air flow). Further, the second air guide member 42 can block the wind W0 sent from the blower fan 2 from flowing directly between the heat transfer surface 13 and the flat plate member 3. As a result, the flow direction of the wind W2 incident (inflowing) so as to intersect (substantially orthogonal) to the heat transfer surface 13 that has passed through the hole 3a of the flat plate member 3 is such that the heat transfer surface 13 and the flat plate member flow. 3 can be prevented from being changed by the flow of the wind W0 directly flowing in between.

  In the first embodiment, as described above, the flat plate member 3 and the air guide member 4 are integrally formed. If comprised in this way, the flat plate member 3 and the baffle member 4 can be easily formed only by bending one plate-shaped member. Further, unlike the case where the flat plate member 3 and the air guide member 4 are provided separately, an increase in the number of parts can be suppressed. Further, since the flat plate member 3 and the air guide member 4 are integrally formed, the flat plate member 3 and the air guide member 4 can be supported without individually supporting the flat plate member 3 and the air guide member 4. It can be fixed at a desired position.

  In the first embodiment, as described above, the heat exchanger 1 has a flat shape and is configured to have a plurality of flow paths 1a through which refrigerant flows. Thereby, since the heat transfer surface 13 can be made relatively large, it is not necessary to separately provide fins or the like for cooling on the heat transfer surface 13. Thereby, the structure of the air cooler 100 can be simplified.

  Moreover, in 1st Embodiment, as above-mentioned, the discharge mechanism 5 arrange | positioned under the heat-transfer surface 13 and accumulating the frost F removed from the heat-transfer surface 13 for discharging | emitting outside is further provided. If comprised in this way, since the accumulated frost F can be partly melted in the discharge mechanism 5 to be made into ice water and discharged to the outside of the air cooler 100, the air cooler in the frost state can be discharged. Unlike the case of being discharged to the outside, the removed frost (ice water) can be easily treated.

(Second Embodiment)
Next, the air cooler 200 of 2nd Embodiment is demonstrated with reference to FIGS. In the second embodiment, unlike the first embodiment, a first flat plate member 31 and a second flat plate member 32 are provided so as to face each other (substantially parallel). In the drawing, the same components as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  In the second embodiment, as shown in FIGS. 6 and 7, the heat exchanger 101 has an X direction (X1 direction and X2) that intersects (substantially orthogonal to) the Z1 direction in which the wind W0 is sent out by the blower fan 2. The first heat transfer surface 131 and the second heat transfer surface 132 are disposed so as to face each other (substantially parallel) in the direction). The air cooler 200 includes a flat plate member 301. The flat plate member 301 is opposed to the first flat plate member 31 provided to face the first heat transfer surface 131 at a predetermined interval (substantially parallel) and the second heat transfer surface 132. And a second flat plate-like member 32 provided so as to be opposed (substantially parallel) with a predetermined interval.

  The air cooler 200 includes an air guide member 401. The air guide member 401 includes a first air guide member 43 and a second air guide member 44. An end portion on the Z1 direction side of the first flat plate member 31 and an end portion on the Z1 direction side of the second flat plate member 32 are connected by a first air guide member 43. Further, the end of the first flat plate member 31 on the Z2 direction side and the end of the second flat plate member 32 on the Z2 direction side straddle the first heat transfer surface 131 and the second heat transfer surface 132. The second air guide member 44 is connected.

  Here, the operation at the time of defrosting the air cooler 200 will be described. As shown in FIG. 8A (a cross section in the XY plane of the air cooler 200), the wind W0 sent out by the blower fan 2 is wind W11 (mainstream air) between the plurality of second air guide members 44. ) The first air guide member 43 passes the plurality of holes 3a provided in the first flat plate member 31 through the wind W11 and intersects (substantially orthogonally) with the first heat transfer surface 131. Wind W21 and wind W11 are passed through a plurality of holes 3a provided in the second flat plate member 32, and divided into wind W22 that intersects (substantially orthogonal to) the second heat transfer surface 132 and conducts the wind. To do. The plurality of winds W21 that have passed through the hole 3a of the first flat plate member 31 and the wind W22 that has passed through the hole 3a of the second flat plate member 32 are the first heat transfer surface 131 and the second heat transfer surface 132, respectively. The impinging jet flow is incident so as to intersect (substantially orthogonal) with respect to. Each of the wind W21 and the wind W22 collides with the first heat transfer surface 131 and the second heat transfer surface 132 and intersects the first heat transfer surface 131 and the second heat transfer surface 132 (substantially orthogonal). So that it enters (inflows). The frost F (or dew condensation caused by subcooled water droplets) adhering to the first heat transfer surface 131 and the second heat transfer surface 132 is blown off and removed by the incident wind W21 and the wind W22, respectively. At the same time, it flows out as wind W31 and wind W32. Since the first heat transfer surface 131 and the second heat transfer surface 132 are collision jet flows, the frost F adhering to the first heat transfer surface 131 and the second heat transfer surface 132 can be sufficiently removed.

  Moreover, the removed frost F is discharged | emitted after being integrated | stacked by the discharge mechanism 5 similarly to 1st Embodiment.

  Next, the operation at the time of cooling the air cooler 200 will be described. By rotating the blower fan 2 in the direction opposite to that during defrosting, wind (airflow) in the Z2 direction is generated as shown in FIG. 8B, and warm wind (from the outside of the air cooler 200) ( Air) W41 comes into contact with the first heat transfer surface 131 and the second heat transfer surface 132 and is cooled to become a plurality of winds W51 and winds W52 passing through the plurality of holes 3a. The wind W51 and the wind W52 merge to become the wind W61, and are blown out of the air cooler 200 by the blower fan 2 to cool the outside of the air cooler 200.

(Effect of 2nd Embodiment)
In the second embodiment, the following effects can be obtained.

  In the second embodiment, as described above, the heat transfer surface 13 of the heat exchanger 1 intersects (substantially orthogonally) the Z1 direction in which the wind W0 is sent out by the blower fan 2 (X1 direction and X2). The first heat transfer surface 131 and the second heat transfer surface 132 disposed so as to face each other (substantially parallel) in the direction), and the plate-like member 3 is predetermined with respect to the first heat transfer surface 131. The first flat plate member 31 provided so as to be opposed (substantially parallel) with a gap of 2 to the second heat transfer surface 132 with a predetermined gap (substantially parallel). And a second flat plate member 32 provided. Thereby, the wind W0 sent from the blower fan 2 along the first heat transfer surface 131 and the second heat transfer surface 132 arranged so as to face each other (substantially parallel) is changed to the first heat transfer. The air can be easily guided so as to intersect (substantially orthogonal) the heat surface 131 and the second heat transfer surface 132. As a result, the frost F adhering to each of the first heat transfer surface 131 and the second heat transfer surface 132 can be effectively removed.

  The remaining effects of the second embodiment are similar to those of the aforementioned first embodiment.

(Third embodiment)
Next, the air cooler 300 of 3rd Embodiment is demonstrated with reference to FIG. In the third embodiment, unlike the first embodiment, no air guide member is provided.

  In the third embodiment, as shown in FIG. 9, the heat transfer surface 133 of the heat exchanger 102 and the flat plate member 302 are disposed so as to face each other (substantially parallel). The blower fan 2 sends out the wind W8 so as to intersect (substantially orthogonal) the heat transfer surface 133. The wind W8 sent out from the blower fan 2 passes through the inside of the housing C and reaches the flat plate member 302. The wind W8 that has passed through the hole 3a of the flat plate member 302 becomes wind W9 that is a collision jet flow, collides with the heat transfer surface 133 so as to intersect (substantially orthogonal), and adheres to the heat transfer surface 133. Remove frost F (including condensation). The removed frost F falls, and is collected and discharged by a discharge mechanism 5 (not shown) provided below the heat transfer surface 133. In FIG. 9, the uneven structure of the heat transfer surface 133 is omitted.

  The remaining effects of the third embodiment are similar to those of the aforementioned first embodiment.

(Modification)
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiment but by the scope of claims for patent, and further includes all modifications (modifications) within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the said 1st-3rd embodiment, although the example whose heat transfer surface is a planar shape without a substantially flat curve was shown, this invention is not limited to this. In the present invention, the heat transfer surface may be constituted by a curved surface or the like. In this case, the flat plate member is also configured by a curved surface or the like along the heat transfer surface at a predetermined interval from the heat transfer surface.

  Moreover, in the said 1st-3rd embodiment, as shown in FIG. 2 etc., the heat transfer surface was repeatedly provided with the recessed part (groove | channel) each extended in a Y direction and a Z direction, and the minute convexity enclosed by the recessed part. Although the example is shown so that the portion periodically appears in the Y direction and the Z direction, the present invention is not limited to this. In the present invention, as shown in FIG. 11, a fine concavo-convex structure may be provided by attaching a metal mesh 135a (made of, for example, aluminum, copper, polytetrafluoroethylene, etc.) to a flat heat transfer surface 135. Good. In this case, for example, the wire mesh 135a has a groove pitch (interval) and a groove depth of about several hundred to 1,000 μm. As a result, the wire mesh 136a can be easily obtained, and can be fixed by simply attaching the support portion 135b to the heat transfer surface 135 with an adhesive, so that a fine uneven structure can be easily formed on the flat heat transfer surface 135. Can be configured. The support portion 135b is a portion sandwiched between the heat transfer surface 135 and the wire mesh 136a.

  Moreover, in the said 1st-3rd embodiment, although the hole part opened by the flat member showed the example which is circular, this invention is not limited to this. In the present invention, the hole portion may be formed of a hexagonal shape (polygonal shape), a cross shape, or a circular shape and a combination of these shapes. In addition to the matrix arrangement, the pattern in which the holes are formed may be configured as a staggered arrangement or an irregular arrangement. Moreover, you may change the shape of a hole, a magnitude | size, a density, etc. by a hole part according to a place.

  Moreover, in the said 1st-3rd embodiment, although the example which comprises a flat member and an air guide member with a metal was shown, this invention is not limited to this. In the present invention, the flat plate member and the air guide member may be formed of a resin plate (for example, plastic). In addition, also when the plate-shaped member 3 and the air guide member 4 are made of resin, they can be integrally formed by a single mold. In addition, it can suppress that dew condensation and frost adhere to a flat plate member and an air guide member by making a flat member and an air guide member from resin.

  Moreover, although the example which uses an air cooler for a unit cooler was shown in the said 1st-3rd embodiment, this invention is not limited to this. In this invention, an air cooler can be widely used for the apparatus which comprises a refrigerating cycle, such as a large sized refrigerator (large sized freezer), for example.

  Moreover, in this invention, although the example which applies this invention to the heat exchanger which has a flat porous tube was shown, this invention is not limited to this. The present invention may be applied to a heat exchanger other than a heat exchanger having a flat porous tube.

  Moreover, although the said 1st-3rd embodiment showed the example comprised so that the wind which passes through the hole part of a plate-shaped member and injects (inflow) may become substantially orthogonal with respect to a heat-transfer surface, this invention is shown. Is not limited to this. In this invention, you may comprise so that the wind which injects with respect to a heat-transfer surface may inject (inflow) diagonally with respect to a heat-transfer surface.

  In the first to third embodiments, the flat plate member and the heat transfer surface, the first heat transfer surface and the second heat transfer surface, the first flat plate member and the second flat plate member are substantially parallel to each other. However, the present invention is not limited to this. In the present invention, the flat plate member and the heat transfer surface, the first heat transfer surface and the second heat transfer surface, the first flat plate member and the second flat plate member are diagonally opposed (substantially parallel). It may be configured.

  Moreover, in the said 1st and 2nd embodiment, although the flat member and the baffle member were integrally formed, the present invention is not limited to this. In the present invention, the flat plate member and the air guide member may be configured separately. In this case, the flat plate member and the air guide member may be made of different materials.

  Moreover, in the said 1st and 2nd embodiment, although the example by which the hole part is not provided in the wind guide member was shown, this invention is not limited to this. In the present invention, as shown in FIG. 10, holes may be provided in the first air guide member 45 and the second air guide member 46. Thereby, the flat plate member 303 and the air guide member 403 can be formed by bending a plate provided with a uniform hole as a whole. In this case, there is no need to design the metal plate so that the hole 3a is formed only in the portion corresponding to the first flat plate member 33 and the second flat plate member 34 of the flat plate member 303. The shaped member 303 and the air guide member 403 can be easily formed. For simplification, in FIG. 10, the heat exchanger 101 (the flat portion having the first heat transfer surface 131 and the second heat transfer surface 132), the flat plate member 303, and the air guide member 403 have a thickness. Is omitted. In addition, the code | symbol in FIG. 10 was shown based on 2nd Embodiment.

  Further, the number of times of folding back of the heat exchangers of the first and second embodiments (the number of heat transfer surfaces 13) is not limited to that shown in the drawing. The number of turns is determined according to the design such as the size and cooling capacity of the device.

  In the heat exchangers of the first and second embodiments, the end of the flat portion or the semi-cylindrical folded portion of the flat portion may be thermally insulated. In this case, for example, the end portion or the folded portion is formed of a heat insulating material, or the heat insulating material is attached to the surface of the end portion or the folded portion. Insulating the end portion and the folded portion of the heat exchanger field can suppress frost from adhering to the end portion and the folded portion of the flat portion.

  Moreover, in the said 3rd Embodiment, although the example which provides a ventilation fan and a flat member on the heat-transfer surface of one side was shown, this invention is not limited to this. In this invention, you may provide a ventilation fan and a flat member in the heat-transfer surface of both sides.

1, 101, 102 Heat exchanger 1a Flow path 2 Blower fan 3, 301, 302, 303 Flat plate member 3a Hole,
4, 401, 403 Wind guide member 5 Discharge mechanism 13, 130, 133, 135 Heat transfer surface 31, 33 First flat plate member 32, 34 Second flat plate member 41, 43, 45 First wind guide member 42, 44 46 Second air guide member 100, 200, 300 Air cooler (cooler)
131 1st heat transfer surface 132 2nd heat transfer surface

Claims (7)

A heat exchanger including a flow path for allowing the refrigerant to pass therethrough,
A blower fan that sends out wind to remove frost attached to the heat transfer surface of the heat exchanger;
A flat member provided to face the heat transfer surface at a predetermined interval;
The flat plate member is a cooler including a plurality of holes for allowing the wind incident thereon to cross the heat transfer surface after being sent out by the blower fan. The blower fan is provided to send air in a first direction along the heat transfer surface of the heat exchanger,
At least downstream of the heat transfer surface in the first direction, the air sent by the blower fan is passed through the plurality of holes provided in the flat plate member, and the heat transfer surface is The cooler according to claim 1, further comprising an air guide member for introducing air so as to intersect with each other. The air guide member is
The flat plate member is provided so as to extend along a second direction orthogonal to the surface of the flat plate member connected to the downstream end of the flat plate member in the first direction and extending in the first direction, A first air guide member for introducing air so as to intersect the heat transfer surface;
Along the third direction opposite to the second direction orthogonal to the surface of the flat plate member connected to the upstream end of the flat plate member in the first direction and extending in the first direction. The cooler according to claim 2, further comprising: a second air guide member that is provided so as to extend along the heat transfer surface and shields the incident air along the heat transfer surface.   The cooler according to claim 2 or 3, wherein the flat plate member and the air guide member are integrally formed. The heat transfer surface of the heat exchanger is
Including a first heat transfer surface and a second heat transfer surface arranged to face each other in a direction intersecting a direction in which wind is sent out by the blower fan,
The flat plate member is
A first flat plate-like member provided to face the first heat transfer surface with a predetermined gap and a first flat member provided to face the second heat transfer surface with a predetermined gap. The cooler according to any one of claims 1 to 4, comprising two flat members.   The cooler according to any one of claims 1 to 5, wherein the heat exchanger has a flat shape and a plurality of flow paths through which a refrigerant flows.   The cooler according to any one of claims 1 to 6, further comprising a discharge mechanism that is disposed below the heat transfer surface and accumulates frost removed from the heat transfer surface and discharges the frost to the outside. .

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