JP2012207854A - Vehicular refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the thickness of an evaporator unit installed on the upper part of a front wall member of a refrigerator car or the like as much as possible so as to inhibit its protrusion into a luggage compartment, and to guide cold air from an air outlet along a ceiling surface so as to ensure that the cold air flows to the rear part of the luggage compartment.SOLUTION: On the front wall member, two cross flow fans 5 are installed as an evaporator fan above an evaporator 4 in the evaporator unit EU installed below an upper rail UR. The cold air from each cross flow fan 5 flows uniformly over a wide range in the width direction of the luggage compartment, and flows along a heat insulating panel IP of the ceiling surface to the rear part of the luggage compartment by s so-called wall effect. A central axis is provided in an impeller which is long in the axial direction of each cross flow fan 5. The central axis is rotatably supported by a casing through an antivibration rubber and is connected to a drive motor 6 through a deflection joint.

Description

  The present invention relates to a refrigeration apparatus for cooling a cargo compartment of a box-type carrier mounted on a refrigeration vehicle or the like, and more particularly to a structure of an evaporator (evaporator) portion of the refrigeration apparatus installed in the cargo compartment. .

  In the field of freight transportation by trucks and the like, the demand for transportation of fresh foods such as vegetables, fruits and seafood or frozen foods is increasing with the diversification of consumer life and the pursuit of convenience. For transporting fresh foods, frozen foods, etc., a refrigerator car or a freezer car that keeps the temperature in the cargo box of a sealed box-type carrier at a low temperature using a freezing device is used. In order to prevent heat from entering from outside, the inside of the cargo compartment of a box type carrier such as a freezer car is usually surrounded by a heat insulating panel in which thin metal plates are laminated on both sides of the heat insulating material. Recently, food safety requirements have become stricter, and it has become necessary to strictly control the temperature in the cargo compartment during transportation so that it does not deviate from the appropriate range according to the cargo to be loaded. Vehicles are also increasing.

  As a box-type loading platform, a wing body with a flip-up roof is often used for the purpose of rationalizing cargo handling operations such as quick loading and unloading of cargo. When transporting fresh foods or frozen foods with strict temperature control, the wing body is installed with a freezing device and the inside of the cargo compartment is surrounded by a heat insulating panel with the required thickness to prevent heat from entering. Prevent as much as possible. On the other hand, for example, in the wing body that transports vegetables etc., emphasizing the efficiency of cargo handling work when loading cargo and increasing the volume inside the cargo compartment, installing only the refrigeration apparatus without the heat insulation panel, A simple refrigerator car may be used.

In a refrigeration system mounted on a vehicle such as a refrigeration vehicle, a compressor (compressor) is driven by a vehicle running engine or an engine dedicated to the refrigeration system to compress refrigerant such as chlorofluorocarbon, and this is placed outside the cargo compartment. It is sent to the condenser (condenser) where it is liquefied. The liquefied refrigerant is squeezed and expanded by an expansion valve to become a low temperature, and then vaporizes while cooling the surrounding air with an evaporator (evaporator) placed in the cargo compartment. The cold air cooled by the evaporator is blown out from above the cargo compartment by the evaporator fan and circulates in the cargo compartment. An evaporator fan is generally assembled together with an evaporator, and a unit in which an evaporator and an evaporator fan are integrated and placed in a cargo compartment is hereinafter referred to as an “evaporator unit”.
In many refrigerator cars, an evaporator unit is further combined with a condenser unit, and the assembly is attached to the upper part of the vehicle cab of the front wall member (front wall) of the box-type cargo bed. In this case, a heat insulating material is disposed between the evaporator unit and the capacitor unit, the evaporator unit is installed in the luggage compartment, and the capacitor unit is placed outside the luggage compartment above the cab. Such a vehicle refrigeration apparatus is described in Japanese Patent Application Laid-Open No. 2000-205728 as an example, and FIG. 6 shows the refrigeration apparatus described in this publication.

  In FIG. 6A, the refrigeration vehicle includes a box-type cargo bed 101 and a cab 102, and each surface of the box-type cargo bed 101 is constituted by a heat insulating panel. Above the cab 102, an assembly 103 in which an evaporator unit and a capacitor unit are integrated is installed. As shown in FIG. 6 (b), this is a structure of a luggage compartment of a housing 104 made of a heat insulating material. The capacitor unit CU is mounted on the external side, and the evaporator unit EU is mounted on the cargo compartment side. The refrigerant compressed by the compressor 105 placed in the engine room is introduced into the condenser 106 through a pipe line and liquefies here. The liquefied refrigerant is sent to an expansion valve (not shown), and is introduced into the evaporator 108 at a low temperature by expansion of the throttle.

  The evaporator 108 is a heat exchanger for cooling the cargo compartment, and an evaporator fan 109 is provided above the heat exchanger. Air in the cargo compartment is sucked by the evaporator fan 109 through the evaporator 108 and cooled. The blown air is blown into the cargo compartment. Such an evaporator unit EU is attached to the upper part of the front wall member FW of the box-type loading platform 101 so as not to protrude into the cargo compartment in order to avoid interference with the loaded cargo.

  In the case of the wing body, as shown in FIG. 7, a hydraulic cylinder OC for opening and closing the wing WG is installed at the top of the front wall member FW, and the evaporator unit is placed below the hydraulic cylinder OC. At the same time, the cold air outlet opens at a position below the hydraulic cylinder OC in the front wall member FW. That is, the front wall member FW to which the evaporator unit is attached has a frame composed of the upper rail UR extending in the vehicle width direction and the side post SP extending in the vertical direction (the same applies to the rear wall member provided with the rear door). A wing WG is attached to a center beam CB mounted on the upper rail UR by a hinge, and an opening / closing hydraulic cylinder OC is accommodated inside the upper rail UR. Such a frame is provided not only in the wing body but also in a normal box-type cargo bed to which a roof panel and a side panel are fixed, and the roof panel is placed on and supported by the upper rail.

Japanese Unexamined Patent Publication No. 2000-205728

  When the evaporator unit attached to the front wall member of the box-type cargo bed is installed so as to overhang the cargo compartment, the loadable cargo is reduced by that amount, and the evaporator unit may be damaged due to the collision of the cargo. In order to store the evaporator unit inside the front wall member and prevent it from protruding into the cargo compartment, it is necessary to reduce the thickness dimension of the evaporator, which is a heat exchanger, and the evaporator fan for blowing air as much as possible.

In addition, in order to cool the entire cargo compartment with the evaporator unit attached to the front wall member, the cool air outlet is set as high as possible, and the cold air is placed along the ceiling surface of the box-type cargo bed. It is desirable to flow to the rear part. If it carries out like this, circulation will be accelerated | stimulated in the form which cool air reaches the rear part through the upper side of the loaded cargo, and cold air with a large specific gravity descends to the floor of the cargo compartment while cooling the cargo.
However, since there is an upper rail of the frame that supports the roof panel at the upper part of the front wall member, the cold air outlet cannot be formed above it. There may be a mounting frame around the actual evaporator unit, so that a certain distance is created between the air outlet and the ceiling surface of the box-type cargo bed so that the cold air follows the ceiling surface. It is difficult to shed it. In particular, in the case of a wing body, the distance between the outlet and the ceiling surface should be larger than that of a normal box-type carrier because the hydraulic cylinder for opening and closing the wing is accommodated in the upper rail of the front wall member. I must.
An object of the present invention is to reduce the thickness of an evaporator unit installed on a front wall member of a box-type cargo bed such as a freezer car to prevent protrusion into a cargo compartment, and further, cool air from a blowout port is applied to a ceiling surface. This is to solve the above-mentioned problems.

In view of the above problems, the evaporator unit of the present invention employs a crossflow fan (a transverse flow fan) as an evaporator fan, and reduces the thickness of the evaporator unit as much as possible. By blowing out as a uniform flow in the width direction, the flow of cold air along the ceiling surface is secured by utilizing the wall effect (Coanda effect). That is, the present invention
“An evaporator unit of a refrigeration system that is mounted in a vehicle and cools the cargo compartment of a sealed box-type carrier,
The box-type loading platform includes a front wall member that supports a roof panel of the box-type loading platform and is provided with an upper rail that extends in the vehicle width direction.
The evaporator unit is mounted on the front wall member below the upper rail so as not to protrude to the cargo compartment side of the wall surface, and the evaporator unit includes an evaporator of a refrigeration apparatus and an upper part of the evaporator. There is a cross flow fan arranged,
The cross flow fan blows out the cold air that has passed through the evaporator along the ceiling surface of the box-type cargo bed ”
It is an evaporator unit characterized by this.

  According to a second aspect of the present invention, a center beam is placed on the wing body, that is, the upper rail, and two wings serving as roof panels are attached to the center beam by hinges. It is preferable to apply to a box type carrier. Moreover, as described in claim 3, it is preferable to apply to a box-type cargo bed having a heat insulating panel attached to the inner surface.

  According to a fourth aspect of the present invention, it is preferable that a guide vane for guiding cool air is provided at the outlet of the cross flow fan.

  As described in claim 5, in the evaporator unit of the present invention, the two cross flow fans can be arranged symmetrically with respect to a center plane extending in the front-rear direction of the box-type cargo bed. In addition, as described in claim 6, the axial length of the cross flow fan (or the total axial length of the two cross flow fans) is an internal method in the width direction of the luggage compartment in the box-type loading platform. It is preferable to set it to 1/2 or more of the dimension.

  According to a seventh aspect of the present invention, it is preferable that the cross flow fan includes a central shaft that is rotated by a motor, and an impeller that is fixed to the central shaft and has a large number of blades around it. In this case, as described in claim 8, the impeller can be configured by combining a plurality of impeller unit bodies in the axial direction and fixing each impeller unit body to the central shaft. .

  Furthermore, as described in claim 9, the central axis of the cross flow fan is connected to the motor via a flexible joint and the other end is supported via an anti-vibration rubber. It is preferable to configure. When this configuration is applied to an evaporator unit (see claim 4) in which the two cross flow fans are arranged symmetrically with respect to a center plane extending in the front-rear direction of the box-type cargo bed, 10, the center axis of each of the crossflow fans is supported by the end on the center plane side via a vibration-proof rubber, and the other end is connected to the motor via a flexible joint. It is preferable to adopt the structure.

  As described in claim 11, the evaporator unit is provided with a frame body that surrounds the evaporator and the cross flow fan, and a rear heat insulating panel that is attached to the frame body outside the cargo compartment of the box-type cargo bed. Is preferred. In this case, as described in claim 12, the condenser of the refrigeration apparatus and the condenser fan can be attached to the outside of the luggage compartment of the box-type loading platform of the rear heat insulating panel.

  In the evaporator unit of the present invention, a cross flow fan is provided as an evaporator fan for sending cold air into the cargo compartment above the evaporator, which is a cooling heat exchanger. A cross-flow fan is a blower that combines an impeller with a large number of small forward-facing blades and a casing, also called a cross-flow fan. Air flows from the outer periphery of the impeller into the interior of the fan and is perpendicular to the rotation axis It flows in, passes through a part of the forward-facing blade again, and is sent while being bent at a substantially right angle from the inflow direction. Moreover, this crossflow fan can make an impeller long in the axial direction of a rotating shaft, and can obtain a uniform flow in an axial direction. Therefore, in the evaporator unit of the present invention, the cold air sucked from the lower side of the cross flow fan is efficiently bent toward the cargo compartment and does not protrude from the front wall member of the box-type cargo bed. In addition, uniform air blowing can be performed over the entire cargo compartment.

In the cross-flow fan, a uniform flow with almost no change in flow velocity in the axial direction of the rotating shaft of the impeller, that is, a two-dimensional flow in a plane perpendicular to the rotating shaft is widely generated at the outlet. Therefore, in the evaporator unit of the present invention, the so-called wall effect (Coanda effect) in which the cold air sent out from the blowout port flows along the ceiling surface of the box-type cargo bed is secured, and the cold air reaches the rear part of the box-type cargo bed. become. This is because the uniform two-dimensional flow in the vertical plane is widely generated at the outlet of the cross flow fan, so that the attached vortex required for the wall effect occurs stably in a wide range in the width direction. (See FIG. 3 described later). Incidentally, at the outlet of a centrifugal fan or the like, the flow velocity distribution is not uniform in the width direction, so that a three-dimensional flow is likely to occur, and the attached vortex cannot be stably held.
Thus, in the evaporator unit of the present invention, it is placed below the upper rail that supports the roof panel, although there is a certain distance between the cold air outlet and the ceiling surface of the box-type cargo bed, Cold air can flow to the rear along the ceiling surface. This effect becomes more prominent when the present invention is applied to the wing body as in the invention of claim 2.

  The distance between the outlet of the evaporator unit and the ceiling surface of the box-type carrier varies depending on the type of the box-type carrier. When the guide vane for guiding the cold air is provided at the outlet of the cross flow fan as in the invention according to claim 4, the cold air blown out is guided in an optimum direction corresponding to the distance from the ceiling surface. Can do.

  In the invention of claim 5, two cross flow fans are arranged in the evaporator unit symmetrically with respect to the center plane extending in the front-rear direction of the box-type cargo bed. Thereby, the circulation of the cold air in the box-type carrier is made more uniform. Furthermore, in order to ensure the circulation of the cool air to the rear part along the ceiling surface of the box-type cargo bed, as in the invention of claim 6, the axial length of the cross flow fan (or the total of the two cross flow fans) The axial length) is preferably set to 1/2 or more of the inner dimension in the width direction of the cargo compartment in the box-type loading platform.

An evaporator unit installed on a box-type cargo bed for a vehicle is subjected to severe vibration accompanying acceleration / deceleration and vertical movement during traveling of the vehicle. The crossflow fan used in the present invention is easily damaged due to the influence of vibration because the impeller is elongated in the axial direction of the rotating shaft.
According to a seventh aspect of the present invention, a cross flow fan is constituted by a central shaft that is rotated by a motor, and an impeller that is fixed to the central shaft and has a large number of blades around it. A general crossflow fan has a structure in which forward-facing blades fixed by a circumferential ring are connected in the axial direction. However, the invention of claim 7 includes a central shaft that is rotated by a motor. Can be increased. As in the invention of claim 8, when the impeller is configured by combining a plurality of impeller unit bodies in the axial direction and fixing each impeller unit body to the central axis, It is possible to easily manufacture a cross flow fan according to the width direction dimension by increasing or decreasing the number of impeller unit bodies.

Further, as in the invention of claim 9, the central axis of the cross flow fan is configured such that one end thereof is connected to the motor via a flexible joint and the other end is supported via an anti-vibration rubber. In some cases, the cross flow fan of the evaporator unit for a vehicle is supported in a floating state by the anti-vibration rubber, and the adverse effect of vibration or noise can be reduced. At the same time, since the motor driving the central shaft is connected via a flexible joint, the rotation of the floating cross flow fan causes the center of the shaft to move between the motor drive shaft and the central shaft of the cross flow fan. Even if a deviation occurs, it is possible to transmit a smooth rotational force while correcting this.
In the invention of claim 10, when such a cross flow fan support structure is applied to an evaporator unit in which two cross flow fans are symmetrically arranged, the center side of the box-type cargo bed is provided for each cross flow fan. The other end is supported by a vibration-proof rubber, and the other end is connected to the motor via a flexible joint. According to the configuration of the invention of claim 10, since there is a bearing having a shorter axial length than the driving unit such as a motor at the center of the box-type loading platform in the vehicle width direction, The part where the flow of blowout is interrupted is shortened, and the uniformity of the flow velocity distribution in the width direction is ensured.

  When the frame surrounding the evaporator and the cross flow fan is provided as in the invention of the eleventh aspect, and the rear heat insulating panel is attached to the outside of the cargo compartment of this frame, the frame has a large number of heat transfer tubes and the like and has a relatively heavy A large evaporator unit can be reliably held on the front wall member. Further, as in the invention of claim 12, the condenser of the refrigeration apparatus and the condenser fan can be mounted outside the luggage compartment of the rear heat insulating panel, so that the refrigeration apparatus can be made compact.

It is a perspective view which shows roughly the evaporator unit of this invention. It is the principal part expansion perspective view and sectional drawing of the evaporator unit of this invention. It is a figure explaining the flow of an evaporator unit. It is an assembly drawing of the cross flow fan of the present invention. It is a figure which shows the components etc. of the crossflow fan of this invention. It is a figure which shows the evaporator unit etc. in the conventional freezing vehicle. It is a figure which shows the structure of the conventional wing body refrigerator, etc.

  Hereinafter, an evaporator unit of the present invention mounted on a box-type cargo bed for a vehicle will be described based on the drawings. In the drawings for explaining the present invention, parts corresponding to the parts of FIGS. 6 and 7 describing the prior art are denoted by the same reference numerals.

  FIG. 1 is a perspective view schematically showing an embodiment of an evaporator unit of the present invention mounted on a wing body similar to FIG. 7, and shows a state where wings and the like are removed for easy understanding. ing. The front wall member FW includes a front frame including an upper rail UR extending in the vehicle width direction and a side post SP extending in the vertical direction, and a hydraulic cylinder (not shown) for opening and closing the wing is installed on the upper rail UR. It is. A center beam CB is spanned between the upper rail UR of the front frame and the upper rail of the rear frame, and the wing is attached to the center beam CB by a hinge in the same manner as the wing body of FIG. Each panel surface constituting the wing body is provided with a heat insulating panel in which thin metal sheets are laminated on both surfaces of a heat insulating material of foamed synthetic resin so as to prevent intrusion of outside air heat.

  The evaporator unit EU of the present invention is mounted below the upper rail UR in the front wall member FW. On the cargo compartment side of the evaporator unit EU, a flat cover 3 formed with an inlet 1 for cargo compartment air and an outlet 2 for cold air is attached at a position substantially coincident with the surface of the front wall member FW. The evaporator unit EU is mounted so as not to protrude from the front wall member FW surface (see FIG. 2B described later). A condenser unit CU of the refrigeration apparatus is mounted on the outer side of the cargo compartment of the evaporator unit EU.

An enlarged perspective view of a portion of the evaporator unit in FIG. 1 is shown in FIG.
As shown in these drawings, the evaporator unit EU has a cross flow fan 5 as an evaporator fan disposed above an evaporator 4 as a heat exchanger for cooling the cargo compartment. In this embodiment, two cross flow fans 5 having the same structure are arranged symmetrically with respect to the center plane extending in the front-rear direction of the wing body, and two motors 6 that drive these cross flow fans 5 are arranged. Are respectively placed on the vehicle width direction end side of the wing body. The evaporator 4, the cross flow fan 5, and the like are surrounded by a frame body 7, and the frame body 7 is attached to the front wall member FW below the upper rail UR.

As shown in FIG. 2 (b), a center beam CB pivotally mounted on the wing WG is placed on the upper rail UR, and a roof panel of the wing WG has a heat insulating panel IP serving as a ceiling surface of the wing body. Is provided. The front wall member FW is also basically composed of a heat insulating panel IP, and its cargo compartment side is covered with a protective plate 8 made of synthetic resin or the like. Further, a rear heat insulating panel 9 fitted with a condenser unit CU of the refrigeration apparatus is fixed to the outside of the cargo compartment of the frame body 7 to prevent the heat of the condenser unit CU and outside air from entering the cargo compartment.
The evaporator unit EU is accommodated in the frame body 7 and the rear heat insulating panel 9 and is installed so as not to protrude from the protective plate 8 to the cargo compartment side. The cold air outlet 2 from the cross flow fan 5 is located directly below the frame body 7, and the outlet 2 is provided with a guide vane 10 for adjusting the direction of the cold air.

The flow of cold air in the evaporator unit EU of the present invention will be described with reference to FIG. FIG. 3A is a schematic diagram for explaining the wall effect (from the Japan Society of Mechanical Engineers, issued July 15, 1977, “Mechanical Engineering Handbook (6th revised edition)”, pages 10-62. (Excerpt)
As indicated by the white arrow in FIG. 3B, the air whose temperature has risen as a result of cooling the inside of the cargo compartment is introduced into the evaporator unit EU from the suction port 1 (FIG. 1) of the cover 3, and the inside of the evaporator 4 It is cooled when it passes while rising. The cold air whose temperature has been lowered is sucked by the cross flow fan 5, passes between the forward-facing blades, is bent at a substantially right angle, and is blown out from below the ceiling surface of the wing body toward the rear of the cargo compartment. .
At this time, in the cross flow fan 5, there is almost no change in flow velocity in the axial direction of the rotating shaft of the impeller at the outlet, and a wide two-dimensional flow in a plane perpendicular to the rotating shaft is generated. Therefore, it is possible to stably generate the attached vortex of FIG. 3A (if the flow velocity distribution is not uniform in the width direction, a three-dimensional flow is generated and the attached vortex is not retained), and the wall effect is achieved. Since it is sufficiently exerted, the cool air flows along the ceiling surface of the heat insulating panel IP to the rear part of the luggage compartment. In order to ensure such an effect, the total axial length of the two cross flow fans 5 is set to be 1/2 or more of the internal dimension in the width direction of the cargo compartment. Furthermore, since there is no drive unit such as a motor having a long axial length at the center in the vehicle width direction (see FIG. 2A), the portion where the flow blown out from the cross flow fan 5 is interrupted is short, and the flow velocity distribution Uniformity in the width direction is ensured.

  As described above, in the evaporator unit of the present invention, by using the cross flow fan, the cold air sucked from below is efficiently bent toward the cargo compartment and does not protrude from the front wall member. Even so, uniform blowing can be performed over the entire cargo compartment. And even if the vertical dimension of the upper rail which supports a roof panel is large like a wing body, cold air can be flowed to back along a ceiling surface using a wall effect.

  Next, the specific structure of the crossflow fan in this embodiment will be described with reference to FIGS. FIG. 4 shows an assembly in which a cross flow fan is housed in a casing. FIG. 5 shows an impeller, a central shaft, and the like of the cross flow fan as a single unit.

  As shown in FIG. 4, the impeller 51 of the cross flow fan 5 includes wall portions 52 at both ends, is accommodated in a casing 53 whose bottom is open, and is supported by the wall portions 52 at both ends. A motor 52 for driving the cross flow fan 5 is mounted on the wall 52 on the vehicle width direction end side, and the drive shaft of the motor 6 is connected to the central shaft 54 of the impeller 51 through the flexible joint 11. (See also FIG. 5). Further, a guide vane 10 that adjusts the blowing direction of the cold air is provided in the casing 53 at the portion of the blowing port 2.

  As shown in FIGS. 5A and 5B, the impeller 51 is an assembly in which a plurality of impeller unit bodies 5U are connected in the axial direction, and the impeller unit body 5U has the forward blades 5B in the circumferential direction. It is fixed with a ring. The circumferential ring is provided at both ends and the center of the impeller unit body 5U in the axial direction, and the central ring 5R is fixed to the central shaft 54 by a rib. That is, the impeller 51 is a combination of a plurality of impeller unit bodies 5U connected to the central shaft 54 rotated by the motor 6 in the axial direction. Accordingly, the number of the impeller unit bodies 5U can be increased or decreased to easily manufacture a cross flow fan according to the width direction dimensions of various loading platforms, and the impeller 51 fixed to the central shaft 54. This increases the strength and rigidity.

As shown in FIGS. 5 (c) and 5 (d), one end of the central shaft 54 of the cross flow fan 5 is connected to the motor 6 via the flexible joint 11. The flexible joint 11 is formed by engaging two claw portions alternately projecting in the circumferential direction with an elastic body such as rubber interposed therebetween, one of the claw portions being a drive shaft of the motor 6 and the other being a blade. It is fixed to the central shaft 54 of the car 51. Further, a bearing having an anti-vibration rubber 12 attached to the periphery thereof is provided at an end portion of the central shaft 54 opposite to the motor 6, and this end portion is provided with a wall portion 52 of the casing via the anti-vibration rubber 12. (Fig. 4).
That is, since the impeller 51 of the cross flow fan that is long in the axial direction is supported by the casing 53 in a floating state by the anti-vibration rubber 12, it is possible to reduce adverse effects of vibration or noise. Furthermore, since the motor 6 that drives the central shaft is connected via the flexible joint 11, even if the shaft center of the motor drive shaft is misaligned due to the rotation of the impeller 51 in the floating state, Smooth rotation is possible.

  As described in detail above, the evaporator unit of the present invention applied to a refrigeration vehicle or the like employs a cross flow fan as an evaporator fan, and prevents the protrusion of the evaporator unit into the cargo compartment by minimizing the thickness dimension of the evaporator unit. The cold air from the air outlet is blown out as a uniform flow in the width direction of the cargo compartment, and the flow of the cold air along the ceiling surface is secured by utilizing the wall effect. In the above-described embodiments, the evaporator unit of the present invention mounted on the wing body has been described. However, the present invention is also applicable to a normal box-type carrier and a container that is detachably loaded on a vehicle. Can do. In the above-described embodiment, the capacitor unit is mounted integrally with the evaporator unit. However, it is obvious that various modifications can be made to the embodiment, such as installing the capacitor unit in the lower part of the vehicle. .

4 Evaporator 5 Cross Flow Fan 51 Impeller 53 Casing 54 Center Shaft 5U Impeller Unit Body 6 Motor 7 Frame 10 Guide Vane 11 Flexible Joint 12 Antivibration Rubber EU Evaporator Unit CU Capacitor Unit FW Front Wall Member UR Upper Rail

Claims (12)

An evaporator unit of a refrigeration apparatus that is mounted on a vehicle and cools the cargo compartment of a sealed box-type carrier,
The box-type loading platform includes a front wall member that supports a roof panel of the box-type loading platform and is provided with an upper rail that extends in the vehicle width direction.
The evaporator unit is mounted on the front wall member below the upper rail so as not to protrude to the cargo compartment side of the wall surface, and the evaporator unit includes an evaporator of a refrigeration apparatus and an upper part of the evaporator. There is a cross flow fan arranged,
The evaporator unit, wherein the cross flow fan blows out cold air that has passed through the evaporator along a ceiling surface of the box-type cargo bed. The evaporator according to claim 1, wherein the box-type cargo bed is a wing body, a center beam is placed on the upper rail, and two wings serving as roof panels are attached to the center beam by hinges. unit. The evaporator unit according to claim 1, wherein a heat insulating panel is attached to an inner surface of the box-type carrier. The evaporator unit according to any one of claims 1 to 3, wherein a guide vane for guiding cool air is provided at an outlet of the cross flow fan. The evaporator unit according to any one of claims 1 to 4, wherein the two cross flow fans are arranged symmetrically with respect to a center plane extending in the front-rear direction of the box-type carrier. The axial length of the cross-flow fan or the total axial length of the two cross-flow fans is set to ½ or more of the inner dimension in the width direction of the cargo compartment in the box-type loading platform. The evaporator unit according to claim 1. The said crossflow fan is comprised from the center axis | shaft rotated with a motor, and the impeller which was fixed to the said center axis | shaft and formed many blade | wings in the circumference | surroundings. Evaporator unit. The evaporator unit according to claim 7, wherein the impeller is configured by combining a plurality of impeller unit bodies in an axial direction, and each impeller unit body is fixed to the central shaft. The evaporator unit according to claim 7 or 8, wherein one end of the central shaft is connected to the motor via a flexible joint, and the other end is supported via a vibration isolating rubber. The two cross flow fans are arranged symmetrically with respect to a central plane extending in the front-rear direction of the box-type carrier, and each central axis of the cross flow fans is an end portion on the central plane side. The evaporator unit according to claim 9, wherein a bearing is supported via an anti-vibration rubber, and an end on the other side is coupled to the motor via a flexible joint. The said evaporator unit is provided with the frame which surrounds the said evaporator and the said cross flow fan, and the back heat insulation panel attached to the said frame on the outer side of the luggage compartment of the said box type loading platform. The evaporator unit described in the crab. The evaporator unit according to claim 11, wherein a condenser of a refrigeration apparatus and a condenser fan are mounted outside the cargo compartment of the box-type cargo bed of the rear heat insulating panel.

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