JP2012189257A - Evaporator unit of refrigeration apparatus for transportation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an evaporator unit of a refrigeration apparatus for transportation in which a cover covering a lower face of the unit body can be reliably fixed to the unit body side without being bolted, and thereby, dropping of dew condensation water or the like can be suppressed.SOLUTION: An evaporator unit 5 of a refrigeration apparatus for transportation includes a lower cover 12 that covers a lower face side of a unit body 10 having built-in fan 14 and evaporator 13. A magnet 23 is laid and fixed to one of a predetermined part on the inner face side of a lower face 12A of the lower cover 12 and a corresponding position on a lower face side of the unit body 10 opposing to the predetermined part; and a metal receiving plate 27 that can be magnetically attracted by the magnet 23 is laid and fixed to the other.

Description

  The present invention relates to an evaporator unit of a transport refrigeration apparatus in which a fan and an evaporator are incorporated.

  In a transport refrigeration system mounted on a refrigerated vehicle, an evaporator unit with a built-in fan and evaporator is installed in the bunboty, and the air inside the banboty is circulated to the evaporator via the fan to cool the inside of the bunboti. ing. This evaporator unit has an outer surface covered with a resin or sheet metal cover. For example, the air inside the bunvotee sucked from the air suction port provided on the rear surface is cooled through the evaporator, and then provided on the front surface. It is set as the structure which blows in in Bamboti from the air blower outlet currently made.

  The cover is bolted to the unit body from the outer surface side, and is cooled together with the air inside the banboti during the cooling operation. For this reason, when the door of the Bamboo is opened during the collection and delivery of the luggage, the outside air containing moisture flows into the Bamboo and comes into contact with the surface of the cooled cover, bolt, etc. Condensation may occur. In particular, if condensed water on the cover surface gathers on the bolt heads protruding from the surface and drops onto the load from there, there is a risk of damaging the load.

  In order to prevent dew condensation on the cover surface, an insulation having a heat insulating function such as foamed polyethylene is affixed, but it was not possible to prevent dripping of dew condensation water on the bolt head. Therefore, as shown in Patent Document 1, a cover that covers the lower surface side of the unit main body is provided with a surface fastener (for example, a so-called Velcro fastener or magic tape; both are registered trademarks). ) Is fixed to the unit main body side, and a bolt or a screw head is not projected from the outer surface of the cover.

JP 2008-202912 A

  However, in the case of using the surface fastener as in Patent Document 1, there is a possibility that the surface fastener may be peeled off due to deterioration with time or may be detached due to vibration shock, and it is difficult to confirm whether the cover is firmly fixed when the cover is attached. There was a problem in terms of reliability. For this reason, relying on bolt fastening is the actual situation, increasing the heat insulation of the cover itself and suppressing dripping of condensed water from the bolt head as much as possible. Increasing it included problems such as increasing costs.

  The present invention has been made in view of such circumstances, and it is possible to reliably fix the unit body side to the unit main body without bolting the cover that covers the lower surface of the unit main body, so that the condensation water can be dropped. It aims at providing the evaporator unit of the transport refrigeration apparatus which can be suppressed.

In order to solve the above-described problems, the evaporator unit of the transport refrigeration apparatus of the present invention employs the following means.
That is, the evaporator unit of the transport refrigeration apparatus according to the present invention is the evaporator unit of the transport refrigeration apparatus in which the lower surface side of the unit main body in which the fan and the evaporator are built is covered with the lower cover. A magnet is fixedly disposed at one of a predetermined position on the inner surface side of the unit and a corresponding position on the lower surface side of the unit body facing the predetermined position, and a metal receiving plate that can be magnetically attracted by the magnet is fixed on the other side. It is arranged.

  According to the present invention, in the evaporator unit of the transport refrigeration apparatus in which the lower surface side of the unit body is covered by the lower cover, the predetermined position on the inner surface side of the lower surface of the lower cover and the lower surface side of the unit body facing the predetermined position. Since the magnet is fixedly arranged at one of the corresponding positions, and the metal receiving plate that can be magnetically attracted by the magnet is fixedly arranged at the other, the lower surface of the lower cover is placed on the lower surface side of the unit body with the magnet. The metal backing plate can be fixed by magnetically attracting each other. Therefore, it is not necessary to fix the lower surface of the lower cover to the lower surface side of the unit body from the outer surface side with bolts, etc., and it is possible to prevent dripping of condensed water from the bolt head and protect the load from condensed water, The appearance of the appearance can be improved by eliminating the bolts from the surface of the lower cover. In addition, because it is fixed with a magnet, there is no fear that the lower cover will fall off due to deterioration over time, or even if the adsorption surface rises due to vibration shock etc. beyond the assumption, it will remain detached because it is re-adsorbed. The lower cover can be securely fixed, and the reliability as the fixing structure can be secured.

  Further, the evaporator unit of the transport refrigeration apparatus of the present invention is the evaporator unit of the transport refrigeration apparatus, wherein the front portion and the rear portion of the lower cover are at predetermined positions on the inner surface side of the lower cover at the unit main body side. It is characterized by being fixed through a stay and a bolt.

  According to the present invention, since the front surface portion and the rear surface portion of the lower cover are fixed to the unit main body side via the stay and the bolt at predetermined positions on the inner surface side of the lower cover, the lower surface has the magnet and the metal receiving plate. The lower cover is fixed to the unit main body side at a predetermined position on the inner surface side of the lower cover via a stay and a bolt, thereby fixing the lower cover to the lower surface, the front surface, and the rear surface. Since the bolts that can be firmly fixed to the unit main body side and the front and rear surfaces are arranged on the inner surface side of the lower cover, even if condensation occurs on the bolt head, the condensation Water can be dropped on the inner surface side of the lower cover. Therefore, the lower cover can be securely fixed to the unit body side, and the occurrence of condensation on the outer surface side of the lower cover and the dripping of the condensed water onto the load can be reliably prevented.

  Further, the evaporator unit of the transport refrigeration apparatus of the present invention is the evaporator unit of the transport refrigeration apparatus, wherein the front portion and the rear portion of the lower cover are at predetermined positions on the inner surface side of the lower cover at the unit main body side. It is fixed by being magnetically attracted via the second and third magnets.

  According to the present invention, the front portion and the rear portion of the lower cover are fixed by being magnetically attracted to the unit main body via the second and third magnets at predetermined locations on the inner surface side of the lower cover. The front and rear portions of the lower cover, whose lower surface is fixed via a magnet and a metal plate, are magnetically attracted to the unit main body side via the second and third magnets at predetermined locations on the inner surface side of the lower cover. By fixing, the lower cover can be firmly fixed to the unit main body at the bottom, front and rear surfaces, and the lower cover can be fixed only by magnetic attraction of the magnet. can do. Therefore, the attachment and detachment of the lower cover during maintenance can be performed without tools, and the occurrence of condensation on the outer surface side of the lower cover and the dripping of the condensed water onto the load can be reliably prevented.

  Furthermore, the evaporator unit of the transport refrigeration apparatus of the present invention is the evaporator unit of the transport refrigeration apparatus, wherein the second and third magnets are fixedly disposed on the lower cover side, and the unit main body side It is characterized in that it can be magnetically attracted to the receiving plate and stopper fixedly disposed on the plate.

  According to the present invention, the second and third magnets are fixedly arranged on the lower cover side, and can be magnetically attracted to the receiving plate and stopper fixedly arranged on the unit body side. Even if the lower surface is subjected to vibrations, impacts, or the like that are beyond expectations, even if the magnet attracting surface is lifted, the magnet can be received by the receiving plate / stopper and re-adsorbed. Therefore, the lower cover can be securely fixed to the unit main body only by the magnet's attracting force, and boltless can be achieved.

  Furthermore, the evaporator unit of the transport refrigeration apparatus of the present invention is the evaporator unit of any of the transport refrigeration apparatuses described above, wherein the metal backing plate and / or the backing plate / stopper are made of SUS material. It is characterized by that.

  According to the present invention, since the metal receiving plate and / or receiving plate / stopper is made of SUS material, the lower cover is made of SUS material having low thermal conductivity and / or receiving plate serving as the receiving plate. It can be fixed to the unit main body side via the stopper, and heat conduction from the unit main body side to the lower cover side can be blocked and suppressed, and the occurrence of rust can be suppressed. Therefore, it is possible to improve the heat insulation of the lower cover and suppress the occurrence of condensation on the outer surface. In addition, the heat insulating properties of the lower cover itself can be reduced to reduce the cost, and the product quality can be improved by preventing the occurrence of rust.

  Furthermore, the evaporator unit of the transport refrigeration apparatus of the present invention is characterized in that the magnet is covered with a resin material in any of the evaporator units of the transport refrigeration apparatus described above.

  According to the present invention, since the magnet is covered with the resin material, the lower cover can be fixed to the unit side via the magnet covered with the resin material having low thermal conductivity. Heat conduction to the lower cover side can be blocked and suppressed. Therefore, it is possible to improve the heat insulation for the lower cover, suppress the occurrence of condensation on the outer surface, and reduce the cost by reducing the heat insulation characteristics of the cover itself.

  Furthermore, the evaporator unit of the transport refrigeration apparatus according to the present invention is the evaporator unit of any of the transport refrigeration apparatuses described above, wherein the unit main body and / or the lower cover are the metal receiving plate and / or the receiving plate. It is made of non-magnetic material except for the stopper.

  According to the present invention, the unit main body and / or the lower cover is made of a nonmagnetic material except for the metal backing plate and / or the backing plate / stopper. The parts other than the metal receiving plate and / or receiving plate / stopper of the unit main body and / or the lower cover are not magnetically attracted to the magnet when the lower cover is attached or detached. Therefore, when attaching and detaching the lower cover, the positioning can be facilitated.

  Furthermore, the evaporator unit of the transport refrigeration apparatus according to the present invention is characterized in that, in the evaporator unit of any of the transport refrigeration apparatuses described above, the lower cover has insulation attached to the outer surface thereof. To do.

  According to the present invention, since the insulation is attached to the outer surface of the lower cover, even if the magnet is disposed on the lower cover side, the distance between the magnet and the outer surface of the lower cover is reduced by the insulation. It is possible to ensure and reduce the magnetic force on the outer surface side of the lower cover. Accordingly, it is possible to prevent the magnetic adsorption of dust such as iron powder on the outer surface of the lower cover, and it is possible to facilitate cleaning even if the dust is adsorbed.

  According to the present invention, the lower surface of the lower cover can be fixed to the lower surface side of the unit body by magnetically attracting the magnet and the metal backing plate to each other. It is not necessary to fix the unit to the lower surface of the unit body, and it is possible to protect the load from condensation by preventing dripping water from dripping from the bolt head. The shine can be improved. In addition, because it is fixed with a magnet, there is no fear that the lower cover will fall off due to deterioration over time, or even if the adsorption surface rises due to vibration shock etc. beyond the assumption, it will remain detached because it is re-adsorbed. The lower cover can be securely fixed, and the reliability as the fixing structure can be secured.

It is an external appearance perspective view of the refrigeration vehicle carrying the evaporator unit of the transport refrigeration equipment concerning a 1st embodiment of the present invention. It is an external appearance perspective view of the evaporator unit of the transport refrigeration apparatus shown in FIG. It is a longitudinal cross-sectional view in the mounting state of the evaporator unit shown in FIG. It is a longitudinal cross-sectional view which shows the fixing structure of the lower cover which has covered the lower surface side of the evaporator unit shown in FIG. FIG. 5 is an enlarged vertical cross-sectional view of a portion fixed by a magnet of the lower cover shown in FIG. 4. It is a top view (A) of a magnet which fixes the lower cover shown in FIG. 4, a front view (B), and a right view (C). It is a longitudinal cross-sectional view which shows the fixing structure of the front side of the lower cover which concerns on 2nd Embodiment of this invention. It is a longitudinal cross-sectional view which shows the fixing structure of the rear surface side of the lower cover which concerns on 2nd Embodiment of this invention.

Embodiments according to the present invention will be described below with reference to the drawings.
[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows an external perspective view of a refrigeration vehicle equipped with the evaporator unit of the transport refrigeration apparatus according to the first embodiment of the present invention, and FIG. 2 shows an external perspective view of the evaporator unit. FIG. 3 shows a longitudinal sectional view of the evaporator unit in the mounted state.
The refrigeration vehicle 1 is configured such that a van body 3 is mounted on the rear side of a cabin 2, and a refrigeration apparatus (cooling refrigeration for transportation) for cooling (cooling) cargo loaded inside the van body 3 at the front portion of the van body 3. Device) 4 is mounted.

  This transport refrigeration apparatus 4 is separated into an evaporator unit 5 mounted on the inner side of the van body 3 and a condensing unit 6 mounted on the front wall side of the van body 3. Are connected via a refrigerant pipe as known. In the present embodiment, there are various types of evaporator units 5 that are mounted on the ceiling surface of the van body 3 among various types. Moreover, as the condensing unit 6, what is mounted by the front wall upper part of the van body 3 is shown. The evaporator unit 5 and the condensing unit 6 are not limited to these.

  As shown in FIG. 2, the evaporator unit 5 includes a unit body 10 having a horizontally long rectangular parallelepiped shape whose thickness direction dimension is reduced. The unit main body 10 includes a frame structure (not shown), a partition wall, and the like that form a framework, and the periphery thereof is covered with an upper cover 11 and a lower cover 12 that form an outer shell. The frame structure, partition walls, etc. (not shown) constituting the unit body 10 are preferably made of a nonmagnetic material such as an aluminum alloy material. The unit main body 10 includes at least an evaporator 13 constituting a refrigeration cycle, and a plurality of fans (turbo fans) 14 for circulating air in the van body 3 with respect to the evaporator 13.

  Further, an air flow passage 15 is formed in the unit main body 10 from the rear side to the front side, and the rear portion thereof has an upper and lower two-layer structure partitioned vertically by a partition wall 16 in the unit thickness direction. ing. The lower layer of the upper and lower two layers is an air suction channel 17, and the upper layer is an air outlet channel 18. A plurality of openings 19 are provided in the partition wall 16, and the plurality of fans 14 are arranged so as to be rotationally driven around the vertical axis so as to face the openings 19, and from the air suction channel 17 side. The air sucked through the opening 19 is configured to be blown out to the air blowing flow path 18 side.

  Further, a plate fin tube type evaporator 13 is disposed at a front portion of the air flow passage 15 so as to cross the air flow passage 15, and air blown from the fan 14 to the air blowing flow passage 18 is circulated. It is comprised so that. A dish-shaped drain pan 20 that receives drain water dripped from the evaporator 13 is disposed below the evaporator 13.

  The upper cover 11 of the unit main body 10 is mainly configured to cover the upper surface of the unit main body 10, and the lower cover 12 mainly covers the lower surface, rear surface, front surface, and left and right side surfaces of the unit main body 10. In addition, a so-called bathtub-shaped cover body is provided. The lower cover 12 having a bathtub shape is a heat insulating cover body in which an insulation 12D such as foamed polyethylene is attached to the outer surface of a thin plate made of a resin material or aluminum alloy material which is a non-magnetic material. A function of receiving dew condensation water generated inside the unit body 10 and dripping onto the lower cover 12 is provided.

  The rear surface 12 </ b> C of the lower cover 12 is configured to have a large number of air suction ports 21 for sucking the air in the van body 3 into the air suction flow path 17 in the unit body 10. In addition, a horizontally long air outlet 22 for blowing air cooled through the evaporator 13 into the van body 3 is formed between the upper cover 11 and the upper portion of the lower cover 12 on the front surface 12B side. ing.

  As described above, the lower cover 12 has a bathtub shape and covers the entire lower surface of the unit main body 10. The lower cover 12 is fixed to the unit main body 10 with the lower surface 12A, the front surface 12B, and the rear surface 12C. . As shown in FIGS. 4 and 5, the lower surface 12 </ b> A of the lower cover 12 is fixedly disposed at required locations (three locations along the horizontal direction in this embodiment) at the inner surface side central portion of the lower surface 12 </ b> A of the lower cover 12. The unit main body 10 is magnetically attracted by a plurality of magnets 23 and a metal receiving plate 27 fixedly arranged via brackets 25 and screws 26 at corresponding positions on the lower surface side of the unit main body 10 facing the magnets 23. It is configured to be fixed to the side.

  As the magnet 23, a neodymium-type or ferrite-type magnet that does not cause low-temperature demagnetization or high-temperature demagnetization, an electromagnet using electric power, or the like can be selected and used. Moreover, as this magnet 23, as shown in FIGS. 6A to 6C, it is desirable to use a magnet covered with a resin material 24 having a low thermal conductivity such as polyacetal resin (POM). On the other hand, as the metal receiving plate 27, a SUS material (for example, SUS430) having a lower thermal conductivity than SS material or the like is used. The lower surface 12A of the cover 12 can be fixed to the lower surface side of the unit body 10 on the inner surface side.

  Further, the front surface 12B and the rear surface 12C of the lower cover 12 are arranged so that the front surface 12B and the rear surface of the lower cover 12 with respect to the brackets 28 and 29 provided at the front and rear portions of the unit main body 10, as shown in FIG. It is fixed with screws via stays 30 and 31 and bolts 32 and 33 extending inward from the inner surface side of 12C. Thereby, it is set as the structure by which fixing means, such as a volt | bolt and a screw, do not protrude at all on the outer surface side of the lower cover 12.

Thus, according to the present embodiment, the following operational effects are exhibited.
When the transport refrigeration apparatus 4 mounted on the refrigeration vehicle 1 is operated, low-temperature and low-pressure refrigerant is circulated through the evaporator 13 of the evaporator unit 5 as is well known. At the same time, the fan 14 is driven to circulate the air in the van body 3 to the air flow passage 15 in the evaporator unit 5. The air and the refrigerant are heat-exchanged by the evaporator 13 to cool the air and blown into the van body 3 from the air blowing port 22 to be used for cooling (cooling) in the van body 3. During this time, the unit main body 10 of the evaporator unit 5 is also cooled.

  On the other hand, each time the cargo is collected and delivered by the refrigerated vehicle 1, the door of the van body 3 is opened and closed, and the outside air containing moisture flows into the van botty 3, and the air is a unit of the evaporator unit 5. It contacts the outer surface of the lower cover 12 constituting the outer shell of the main body 10. However, in this embodiment, since the lower cover 12 is configured as follows, it is possible to suppress the occurrence of condensation on the outer surface side of the cover, and even if condensation occurs, it will be on the load. The situation where it drops and damages the load can be prevented.

(1) The lower cover 12 is made of a resin or has an insulation 12D made of foamed polyethylene or the like attached to the lower surface so as to have a high heat insulating property.
(2) The lower cover 12 has a lower surface on the inner surface side due to magnetic adsorption between the magnet 23 covered with the resin material 24 having low thermal conductivity and the metal receiving plate 27 made of SUS material having low thermal conductivity. It is fixed to the main body 10 side, and projections on the outer surface side are eliminated.
(3) The front surface 12B side and the rear surface 12C side of the lower cover 12 are also fixed to the unit main body 10 side via the stays 30 and 31 and the bolts 32 and 33 on the inner surface side of the lower cover 12. Also on the front surface 12A and the rear surface 12C, protrusions to the outer surface side are eliminated.

  For this reason, the dew condensation itself on the outer surface of the lower cover 12 can be suppressed, and even if dew condensation occurs, there is no projection such as a bolt head on the outer surface of the cover, and the dew condensation water is not on the bolt head or the like. It is possible to prevent the protrusions from gathering and dropping on the cargo. Therefore, the load can be protected from the dew condensation water, and the appearance of the appearance can be improved by eliminating the bolts and screws from the outer surface of the lower cover 12. In addition, because of fixing with the magnet 23, even if the lower cover 12 falls off due to deterioration over time, or even if the attracting surface rises due to vibrations or impacts more than expected, it remains detached because it is attracted again. There is no worry, the lower cover 12 can be securely fixed, and the reliability of the fixing structure can be ensured.

  Moreover, since the bolts 32 and 33 for fixing the front surface 12B and the rear surface 12C of the lower cover 12 to the unit main body 10 side are arranged on the inner surface side of the lower cover 12, the heads of the bolts 32 and 33 are temporarily Even if dew condensation occurs, the dew condensation water can be dropped and received on the inner surface side of the lower cover 12. As a result, the lower cover 12 can be securely fixed to the unit base 10 side, and the occurrence of condensation on the outer surface side of the lower cover 12 and the dripping of the condensed water onto the load can be reliably prevented. be able to.

  Further, since the metal receiving plate 27 on the side magnetically attracted to the magnet 23 is made of a SUS material having a low thermal conductivity with respect to the SS material or the like, the lower cover 12 is made of a SUS material having a low thermal conductivity. It can fix to the unit main body 10 side through the metal receiving plate 27 of this, can interrupt | block and suppress the heat conduction from the unit main body 10 side to the lower cover 12 side, and suppresses generation | occurrence | production of rust. be able to. Further, since the magnet 23 is covered with a resin material 24 such as POM having a low thermal conductivity, the lower cover 12 is interposed through the magnet 23 covered with the resin material 24 having a low thermal conductivity. It can fix to the unit main body 10 side, and also by this, the heat conduction from the unit main body 10 side to the lower cover 12 side can be interrupted | blocked and suppressed.

  As a result, the heat insulation with respect to the lower cover 12 can be improved, and the occurrence of condensation on the outer surface of the lower cover 12 can be further suppressed. Moreover, since it becomes possible to reduce the heat insulation characteristic of lower cover 12 itself, cost reduction can be aimed at, and generation | occurrence | production of rust can be prevented and merchantability can be improved.

  Further, in the present embodiment, constituent members such as a frame and a partition wall constituting the unit main body 10 are made of a nonmagnetic material such as an aluminum alloy material except for the metal receiving plate 27. Therefore, the magnet 23 provided on the lower cover 12 side is not magnetically attracted to portions other than the metal receiving plate 27 when the lower cover 12 is attached / detached. Therefore, when the lower cover 12 is attached / detached. The positioning can be facilitated.

  Further, since the insulation 12D is affixed to the outer surface of the lower cover 12, even if a magnet is disposed on the lower cover 12 side, the insulation 12D causes the magnet 23 and the outer surface of the lower cover 12 to be separated. It is possible to secure a distance between them and reduce the magnetic force on the outer surface side of the lower cover 12, thereby preventing magnetic adsorption of dust such as iron powder to the outer surface of the lower cover 12. Even if dust is adsorbed, cleaning can be facilitated.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS.
This embodiment differs from the first embodiment described above in the fixing structure of the front surface 12B and the rear surface 12C of the lower cover 12 to the unit body 10. Since other points are the same as those in the first embodiment, description thereof will be omitted.
In the present embodiment, the front surface 12B side and the rear surface 12C side of the lower cover 12 are also configured to be fixed to the unit body 10 side by magnetic attraction via a magnet.

  That is, as shown in FIGS. 7 and 8, the second magnet 35 and the third magnet 36 are fixedly disposed at predetermined positions on the inner surface side of the front surface 12B and the rear surface 12C of the lower cover 12, and the second and third magnets 35 and 36 are fixed. Metal receiving plates 37 and 38 that can be magnetically attracted to the second and third magnets 35 and 36 are fixedly disposed at corresponding positions on the unit body 10 side facing the third magnets 35 and 36. ing.

  The metal receiving plates 37 and 38 are made of SUS material having a lower thermal conductivity than SS materials and the like, and the attracting surfaces of the magnets 35 and 36 are separated from the metal receiving plates 37 and 38 by vibration shock or the like. The receiving plates and stoppers 37 and 38 having an upward surface or an upward stopper surface are provided so as to be re-adsorbed without being separated even if they float.

  As described above, the front surface 12B and the rear surface 12C of the lower cover 12 in which the lower surface 12A is fixed via the magnet 23 and the metal receiving plate 27 are secondly moved to the unit main body 10 side at predetermined positions on the inner surface side of the lower cover 12. In addition, by adopting a configuration in which the lower cover 12 is fixed by magnetic attraction via the third magnets 35 and 36, the lower cover 12 can be firmly fixed to the unit body 10 side with the three surfaces of the lower surface 12A, the front surface 12B, and the rear surface 12C. In addition, since the lower cover 12 can be fixed only by the magnetic attraction of the magnet 23 and the second and third magnets 35 and 36, the lower cover 12 can be boltlessly fixed. Accordingly, the lower cover 12 can be attached and detached during maintenance without tools, and the occurrence of condensation on the outer surface side of the lower cover 12 and the dripping of the condensed water onto the load can be reliably prevented. it can.

  In addition, since the metal receiving plates 37 and 38 are made of a SUS material receiving plate and stopper having a low thermal conductivity, the lower cover 12 is subjected to vibrations, impacts, and the like that are larger than expected. 3, even if the attracting surfaces of the three magnets 35 and 36 are lifted, the magnets 35 and 36 can be received and re-adsorbed by the receiving plate / stopper, and the heat from the unit body 10 side to the lower cover 12 side can be obtained. Conduction can be suppressed. Therefore, the lower cover 12 can be securely fixed to the unit main body 10 only by the magnet's attraction force, can be made boltless, and the heat insulation with respect to the lower cover 12 is enhanced, and the outer surface side of the lower cover 12 is improved. The occurrence of condensation can be suppressed.

  Further, also in this embodiment, members such as a frame and a partition wall constituting the unit main body 10 are non-magnetic such as an aluminum alloy material except for the metal receiving plates (receiving plate and stopper) 37 and 38. Since it is made of material, the magnets 35 and 36 fixed to the lower cover 12 side are magnetically attracted to portions other than the metal receiving plates (receiving plates and stoppers) 37 and 38 when the lower cover 12 is attached and detached. Therefore, when the lower cover 12 is attached and detached, the positioning can be facilitated.

  In addition, this invention is not limited to the invention concerning the said embodiment, In the range which does not deviate from the summary, it can change suitably. For example, in the above-described embodiment, the so-called pusher type evaporator unit in which the evaporator 13 is disposed on the downstream side of the fan 14 has been described. However, the puller type evaporator unit in which the evaporator 13 is disposed on the upstream side of the fan 14 is described. Of course, the above can be applied similarly.

  In the above-described embodiment, the magnet 23 and the second and third magnets 35 and 36 are fixedly disposed on the lower cover 12 side, and the metal receiving plate is disposed at a corresponding position on the unit body 10 side facing the magnet 23. The example in which 27, 37, and 38 are fixedly arranged has been described, but the reverse configuration, that is, a structure in which a metal receiving plate is fixedly arranged on the lower cover 12 side and a magnet is fixedly arranged on the unit body 10 side Also good. In this case, since the lower cover 12 is a thin plate made of a resin material or an aluminum alloy material which is a nonmagnetic material, the portions other than the metal receiving plates 27 and 37 and 38 are the magnet 23 and the second and third portions. The magnets 35 and 36 are not magnetically attracted, and positioning when the lower cover 12 is attached and detached can be facilitated.

DESCRIPTION OF SYMBOLS 1 Refrigeration vehicle 4 Transportation refrigeration apparatus 5 Evaporator unit 10 Unit main body 12 Lower cover 12A Lower surface 12B Front surface 12C Rear surface 12D Insulation 13 Evaporator 14 Fan 23 Magnet 24 Resin material 27 Metal receiving plate 30, 31 Stay 32, 33 Bolt 35 First 2 magnets 36 3rd magnets 37 and 38 Metal receiving plate (receiving plate and stopper)

Claims (8)

In the evaporator unit of the transport refrigeration system in which the lower surface side of the unit body in which the fan and the evaporator are built is covered with the lower cover,
A magnet is fixedly arranged at one of a predetermined position on the inner surface side of the lower surface of the lower cover and a corresponding position on the lower surface side of the unit body facing the predetermined position, and on the other side, a metal that can be magnetically attracted by the magnet An evaporator unit for a transport refrigeration apparatus, wherein a receiving plate is fixedly arranged.   2. The transport refrigeration according to claim 1, wherein a front surface portion and a rear surface portion of the lower cover are fixed to the unit main body side via stays and bolts at predetermined positions on the inner surface side of the lower cover. The evaporator unit of the device.   The front portion and the rear portion of the lower cover are fixed by being magnetically attracted to the unit main body via second and third magnets at predetermined locations on the inner surface side of the lower cover. The evaporator unit of the transport refrigeration apparatus according to claim 1.   The second and third magnets are fixedly arranged on the lower cover side and can be magnetically attracted to a receiving plate / stopper fixedly arranged on the unit main body side. The evaporator unit of the transport refrigeration apparatus according to claim 3.   The evaporator unit of the transport refrigeration apparatus according to any one of claims 1 to 4, wherein the metal receiving plate and / or the receiving plate / stopper are made of SUS material.   The evaporator unit of the transport refrigeration apparatus according to claim 1, wherein the magnet is covered with a resin material.   7. The unit main body and / or the lower cover is made of a nonmagnetic material except for the metal receiving plate and / or the receiving plate / stopper. Evaporator unit for transport refrigeration equipment. The evaporator unit of the transport refrigeration apparatus according to any one of claims 1 to 7, wherein an insulation is affixed to an outer surface of the lower cover.

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