JP2007024348A - Cooling storage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling storage having a new air curtain forming structure. <P>SOLUTION: A ventilation duct 50 is mounted in upper and lower heat insulating doors 40 in a state of being vertically penetrated therethrough, and a blower device 60 is mounted at a front side of a lower face of a refrigerator main body 10. The blower device 60 sucks the air at a lower face side by a cross flow fan 62 through a rectification member 70, and supplies the air toward a lower face of the lower heat insulating door 40 through a lower duct 80. A machine room 20 is provided with a guide plate 110 for directing the air from the ventilation duct 50 toward a condenser 23. When the heat insulating doors 40 are opened, air curtain A is formed at an outer side of an opening portion 18 by the air supplied from the lower duct 80 at a lower side and from the ventilation duct 50 of the lower heat insulating door 40 at an upper side, and when the heat insulating doors 40 are closed, the air from the blower device 60 rises in the ventilation duct 50 of the upper and lower heat insulating doors 40 and guided by a guide plate 110 to be directed to the condenser 23 as cooling air. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cooling storehouse having an air curtain forming function.

Conventionally, what was described in patent document 1 is known as this kind of cooling storage. This is provided with a top duct that guides a part of the cool air generated by the cooler at the ceiling of the storage room, a cross flow fan is provided on the front side thereof, and an opening at the front of the storage room When the heat insulating door attached to the door is opened, the cross flow fan is driven, and cool air is blown out from the upper part to the lower part inside the opening, so that a so-called air curtain is formed. It is designed to prevent leaking outside.
Japanese Patent Laying-Open No. 2005-77008 (FIG. 1)

However, in the above-mentioned conventional apparatus, since the air curtain is formed inside the opening, that is, inside the opening, there is a problem that the substantial storage capacity of the storage is reduced, and further improvement is eagerly desired. It was.
The present invention has been completed based on the above circumstances.

  As a means for achieving the above object, the invention of claim 1 is provided with a storage body comprising a heat-insulating box body having a front opening and having a storage chamber into which cold air is circulated and supplied, and the front opening of the storage body is provided. In the cooling storage where a heat insulation door is detachably attached to the part, a machine room is provided on the upper surface of the storage body, and a refrigeration apparatus including a condenser is provided in the machine room, the heat insulation door includes A ventilation duct penetrating in the vertical direction is provided, and a lower surface of the storage body is provided with a blower device that sucks air on the lower surface side and blows it upward toward the lower end surface of the heat insulating door. Is characterized in that a guide means for directing the air blown from the upper end of the ventilation duct to the condenser is provided.

The invention of claim 2 is characterized in that, in the apparatus of claim 1, a gap is provided between the blower outlet of the blower and the lower end of the ventilation duct of the heat insulating door.
According to a third aspect of the present invention, in the first aspect, a plurality of the heat insulating doors are provided side by side in the vertical direction, and the ventilation ducts are formed in alignment with each heat insulating door. It has the characteristics.

According to a fourth aspect of the present invention, there is provided the apparatus according to the third aspect, wherein a gap is provided between the outlet of the blower and the lower end of the ventilation duct of the lowermost heat insulating door. It is characterized in that a gap is also provided between the upper end of the ventilation duct of the heat insulation door and the lower end of the ventilation duct of the heat insulation door immediately above.
According to a fifth aspect of the present invention, in the apparatus according to any one of the first to fourth aspects, the air blower sucks air on a lower surface side of the storage body along the lower surface of the storage body. It is characterized in that the straightening member is attached.

<Invention of Claim 1>
When the door is opened, air from the blower is blown up outside the opening to form an air curtain. When the door is closed, the air blown from the blower rises through the ventilation duct in the heat insulating door, and the air blown from the upper end of the air blower is applied toward the condenser by the guide means. Since the air is sucked on the lower surface side of the storage body and has a relatively low temperature, the condenser can be efficiently cooled.
That is, according to the present invention, when the door is opened, a blow-up type air curtain can be formed by the air on the lower surface side of the storage body, and when the door is closed, the air can be used as cooling air for the condenser. Since it can form in the outer side of a part, there is also no possibility of reducing the storage volume of a storage chamber.

<Invention of Claim 2>
When the door is closed, a part of the air blown out from the blower leaks from the gap, and a continuous upward flow is generated in the vicinity of the lip of the opening, thereby suppressing condensation and icing on the lip of the opening. The
<Invention of Claim 3>
When the heat insulation door is open, an air curtain is formed on the outside of the opening by the air blown from the blower or the ventilation duct of the heat insulation door below it. The blown air rises up the ventilation duct in each heat insulation door and is applied toward the condenser.

<Invention of Claim 4>
When the door is closed, a part of the air rising from the blower through the ventilation duct of each heat insulating door leaks from each gap and a continuous upward flow is generated near the mouth edge of each opening, and condensation forms on the mouth edge of each opening. And freezing is suppressed.
<Invention of Claim 5>
When the air on the lower surface side of the storage body is sucked into the blower, the air flows along the lower surface of the storage body by the rectifying member. Since air that is relatively hotter than the inside air flows along the lower surface of the storage body, a temperature drop on the lower surface of the storage body is suppressed, and thus condensation on the lower surface is prevented.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, a case where the present invention is applied to a four-door type vertical refrigerator is illustrated. First, the entire structure of the refrigerator will be described with reference to FIG. Reference numeral 10 denotes a refrigerator main body, which is composed of a vertically long heat insulating box body having a front opening filled with a foamed resin 13 as a heat insulating material between an outer box 11 and an inner box 12, and is set up at four corners on the lower surface. The inside of the storage chamber 15 is supported by the legs 14. The front opening of the storage chamber 15 is partitioned into a total of four openings 18 in the upper, lower, left, and right directions by a cross-shaped partition frame 17, and a heat insulating door 40, which will be described in detail later, can be opened and closed in a double door manner. It is installed.

A machine room 20 is provided on the upper surface of the refrigerator main body 10, and in detail, the machine room 20 has its front panel 20 </ b> A protruding to almost the surface position of the heat insulating door 40 with the bottom surface opened. A refrigeration apparatus 21 is installed at a position in the machine room 20 at the back. The refrigeration apparatus 21 includes a compressor 22, an air-cooled condenser 23, and the like, and is attached to a heat-insulating base 24 as a unit. The base 24 is a window hole 27 in the ceiling wall of the storage room 15. It is attached so as to block.
An air duct 30 is stretched on the lower surface side of the window hole 27 in the ceiling portion of the storage chamber 15, and a cooler chamber 31 is formed above the air duct 30. A suction port 32 is formed on the front side of the air duct 30, and a blower port 33 is formed on the rear edge side.

  In the cooler chamber 31, a cooler 25 (evaporator) is accommodated in a form attached to the lower surface of the base 24, and an internal fan 35 is provided facing the suction port 32. The cooler 25 is circulated and connected to the above-described refrigeration apparatus 21 through a refrigerant pipe to constitute a known refrigeration cycle. When the internal fan 35 is driven while operating the refrigeration apparatus 21 (compressor 22), the internal air of the storage chamber 15 is sucked into the cooler chamber 31 from the suction port 32 by the internal fan 35, and the air The cold air is generated by heat exchange while flowing through the cooler 25, and the cold air is blown out from the outlet 33 along the inner surface of the storage chamber 15, and the cold air is circulated and supplied into the storage chamber 15 for cooling. It has come to be.

Next, the heat insulating door 40 will be described. The heat insulating door 40 includes four pieces, upper, lower, left and right, but is formed in the same structure except for the mounting position of the handle 57 and the hinge structure.
The heat insulating door 40 is basically formed by assembling the exterior plate 42 and the interior plate 43 to form a shallow box-shaped outer shell 41, and a foamed resin 48 that is a heat insulating material is foamed in the outer shell 41. A ventilation duct 50 is mounted in the heat insulating door 40 so as to face in the vertical direction.
Specifically, as shown in FIGS. 2 and 3, an exterior plate 42 made of a metal plate having a shallow box shape opened on the back surface, and an interior plate 43 made of synthetic resin fitted in the back surface opening of the exterior plate 42, Is provided. A mounting groove 44 into which the magnet packing 45 is fitted is formed on the periphery of the back surface of the interior plate 43. In addition, a window hole 47 having a square shape slightly smaller than the upper surface plate 46A or the lower surface plate 46B is formed at a substantially central portion between the upper surface plate 46A and the lower surface plate 46B of the exterior plate 42.

The ventilation duct 50 is made of a metal plate or a synthetic resin, and has a substantially the same cross-sectional shape as the window hole 47 of the exterior plate 42 described above, and has a rectangular tube shape having a height comparable to the overall height of the exterior plate 42. Is formed. Three vertical partition plates 51 shown in the figure are mounted in the ventilation duct 50 with an interval between them, and the upper end of the partition plate 51 is located slightly below the upper end of the ventilation duct 50 and the lower end is The lower end of the ventilation duct 50 is reached.
The above-described ventilation duct 50 is assembled in the outer shell 41 composed of the outer plate 42 and the inner plate 43 in a state where the upper and lower openings thereof are aligned with the upper and lower window holes 47 of the outer plate 42. A foamed resin 48 is filled in the outside of the ventilation duct 50 in 41. A synthetic resin decorative frame 53 having a flange 54 at the upper edge is fitted from the window hole 47 of the upper surface plate 46A of the exterior plate 42 to the upper end portion of the ventilation duct 50. In the decorative frame 53, two louvers 55 shown in the figure are formed in a direction intersecting with the partition plate 51. In addition, the magnet packing 45 is mounted in the mounting groove 44 of the interior plate 43 to complete the heat insulating door 40.

  A handle 57 is attached to the surface of each heat insulation door 40, for example, each is attached to a position gathered at the central portion of the whole of the four heat insulation doors 40. Two heat insulating doors 40 on the left and right sides are mounted so as to be openable and closable. Here, when the upper and lower heat insulating doors 40 are closed, the ventilation ducts 50 of both heat insulating doors 40 are aligned in the vertical direction as shown in FIG. However, a predetermined gap s is opened between the decorative frame 53 arranged at the upper end of the ventilation duct 50 in the lower heat insulation door 40 and the lower end of the ventilation duct 50 in the upper heat insulation door 40. .

  A blower 60 is provided at a front position on the lower surface of the refrigerator body 10. Specifically, as shown in FIGS. 4 to 7, a pair of left and right air supply chambers 61 are formed on the front side of the bottom wall 10 </ b> A of the refrigerator body 10. Each blower chamber 61 is formed in a shape having a horizontally long rectangular cross section and recessed in a predetermined dimension at the back side on both sides of the front surface of the bottom wall 10 </ b> A across the width direction. Includes a cross flow fan 62 that is rotationally driven by a motor 63 so as to face in the left-right direction. A suction port 65 opened in the lower surface of the refrigerator main body 10 is formed at a bottom surface on the back side of the blower chamber 61, specifically, a position corresponding almost directly below the cross flow fan 62, and a front opening of the blower chamber 61 is formed. Is the air outlet 66. The opening dimension of the air outlet 66 is set to be the same as the length of the ventilation duct 50 provided in the heat insulating door 40, and two upper and lower louvers 67 are provided in the air outlet 66. It is arranged.

On the lower surface of the refrigerator main body 10, a rectifying member 70 is arranged in a region extending over almost the entire width on the front half side. The rectifying member 70 is made of a synthetic resin, and is formed in a shallow dish shape that is open on the rear surface as a whole. The upper edge is attached in close contact with the lower surface of the refrigerator main body 10, and the opening on the rear surface is air intake. It is the inlet 71 (refer FIG. 1).
On the other hand, a mounting recess 72 for the filter 105 to be described later is formed on the upper surface on the front end side of the rectifying member 70 so as to be divided into left and right, and the suction port 65 of the air blowing chamber 61 is formed on the bottom surface of each mounting recess 72. A through-hole 73 is formed corresponding to a position directly below the center. The front wall 72A of each mounting recess 72 is formed at a position slightly retracted from the front edge of the rectifying member 70. The front wall 72A has an insertion port 74 into which the filter mounting plate 102 is inserted, and An insertion groove 75 into which the rear end of the filter mounting plate 102 is inserted is formed in the back wall.

  A duct structure 77 is attached to the front surface over both the air blowing chambers 61 by an attachment 90 that also serves as a filter support. The duct structure 77 is made of a synthetic resin, and as shown in FIG. 6, includes an L-shaped main body portion 78 formed by suspending a rear surface plate 78B from the rear edge of the upper surface plate 78A, and the upper surface plate 78A and the rear surface plate. A pair of left and right lower ducts 80 are formed between 78B. Each lower duct 80 has a cross-sectional shape substantially corresponding to the air outlet 66 of the blower chamber 61, and is bent and formed in a substantially arc shape as a whole. As shown in FIG. The rear plate 78B is opened to serve as a suction port 81A, and the upper end is opened to the top plate 78A to serve as a blowout port 81B. Two louvers 67 shown in the figure are formed at the air outlet 81B.

  On the back surface of the rear plate 78B of the duct structure 77, a mounting cylinder 85 through which bolts 83 can be inserted at positions between the positions where the lower ducts 80 are formed and at positions outside the positions where the lower ducts 80 are formed. Projecting from top and bottom. On the other hand, on the front surface of the bottom wall 10 </ b> A of the refrigerator main body 10, mounting holes 86 into which the mounting cylinders 85 are tightly fitted are formed at corresponding six locations, and holes 86 </ b> A are formed on the inner surface of each mounting hole 86. A nut 87 is provided on the back side when opened.

  The mounting body 90 is also made of a synthetic resin, and as a whole, is formed in an L shape in which a slightly thick lower surface plate 91B projects rearward from the lower edge of the front plate 91A, and the rear surface of the front plate 91A. In this case, deep insertion cylinders 92 into which the bolts 83 are inserted are projected at six positions corresponding to the mounting cylinder 85 of the duct structure 77 described above. The rear end of each insertion tube 92 reaches a position slightly before the rear end of the lower surface plate 91B, and a hole 92A is also formed in the rear surface. A positioning groove 94 is formed on the upper surface of the rear edge portion of the lower surface plate 91B. The positioning groove 94 is fitted into the positioning protrusion 93 protruding from the lower edge of the rear surface plate 78B of the duct component 77.

In the duct structure 77, the rear plate 78 </ b> B is applied to the front surface of the bottom wall 10 </ b> A of the refrigerator main body 10 while fitting each mounting cylinder 85 into the corresponding mounting hole 86. Subsequently, the attachment body 90 is pushed in along the lower side of the upper surface plate 78A of the duct structure 77, and the rear end of the fitting cylinder 92 is formed on the rear surface plate 78B of the duct structure 77 as shown in FIG. Pushing is stopped when it hits the front surface, and the positioning protrusion 93 fits in the positioning groove 94 at that time. As will be described later, the rear end of the rail 107 provided on the lower surface of the lower surface plate 91 </ b> B contacts the front wall 72 </ b> A of the mounting recess 72 of the rectifying member 70.
From this state, the bolts 83 are fitted into the respective fitting cylinders 92 together with the washers 84 and screwed into the nuts 87 through the attachment cylinders 85, whereby the duct constituting body 77 is attached over the front surfaces of the blower chambers 61.

  At this time, as shown in FIG. 4, the left and right lower ducts 80 are in close contact with the blowout ports 66 of the corresponding blower chambers 61 with the suction ports 81A at the rear ends thereof, and the blowout ports 81B at the upper ends are Corresponding to match directly below the ventilation duct 50 provided in the corresponding heat insulating door 40 on the side. However, a predetermined gap s is formed between the air outlet 81B at the upper end of the lower duct 80 and the lower end of the ventilation duct 50 in the lower heat insulating door 40 (see FIG. 1). The front edge of the upper surface plate 78 </ b> A in the duct structure 77 protrudes from the front surface of the mounting body 90 to the position of the almost surface of the heat insulating door 40, and this protruding portion is a flange 95.

  The attachment body 90 is configured to be detachably mounted with two left and right attachments 100 to which the filter 105 is mounted. The attachment 100 is made of a synthetic resin, and as shown in FIGS. 6 and 7, a filter mounting plate 102 is formed from a lower edge of the vertical operation plate 101 having a width approximately half the full width of the refrigerator body 10. Projected in a horizontal position. The filter mounting plate 102 is formed in a stepped shape in which the rear end side is a narrow portion 102A that is inserted almost tightly into the mounting recess 72, and an attachment hole that is opened at the center of the narrow portion 102A. A plate-like filter 105 is detachably fitted to 103. The filter 105 has a size capable of covering the upper surface side of the through hole 73 opened in the bottom surface of the mounting recess 72.

On the other hand, on the lower surface of the lower surface plate 91B of the attachment body 90, a pair of left and right rails 107 that slide and guide both side edges of the wide portion 102B of the filter mounting plate 102 of the attachment 100 are provided. The entrance at the front end of each rail 107 is widened for guide.
Therefore, in the attachment 100, both side edges of the wide portion 102B of the filter mounting plate 102 are fitted to the rail 107, and the narrow portion 102A is inserted into the insertion port 74 of the front wall 72A of the mounting recess 72, along the rail 107. The insertion is stopped when the stepped portion 106 of the filter mounting plate 102 hits the front wall 72A and the narrow portion 102A is inserted into the mounting recess 72 and inserted into the insertion groove 75. The

At this time, as shown in FIG. 4, the narrow portion 102 </ b> A of the filter mounting plate 102 fits almost tightly into the peripheral wall of the mounting recess 72, and the filter 105 is connected to the suction port 65 of the blower chamber 61 and the mounting recess 72. It is made into the state stretched horizontally between the through-holes 73 of the bottom face.
Further, the operation plate 101 of the attachment 100 is tightly stored under the flange portion 95 protruding from the upper part of the front surface of the attachment body 90, and the operation plate 101 of both attachments 100 is abutted between adjacent edges. The front surface of the mounting body 90 is covered completely.
A pair of left and right finger hooks 108 used for removing the attachment 100 are cut out at the lower end of the operation plate 101 of the attachment 100.

  Further, a guide plate 110 is mounted on the back surface of the front panel 20A of the machine room 20 at a position corresponding to the front of the condenser 23 described above. This guide plate 110 is formed in an arc shape that bulges outward, and extends from the lower end of the back surface of the front panel 20A toward the position ahead of the predetermined dimension from the front edge of the upper surface of the condenser 23. Is provided. Therefore, as will be described later, the air blown up from the ventilation duct 50 of the upper heat insulating door 40 flows along the guide plate 110 and is directed to the condenser 23.

Then, the effect | action of this embodiment is demonstrated.
During the operation of the refrigerator, the cross flow fan 62 mounted on the blower 60 is driven to rotate. As a result, the air on the lower surface of the refrigerator main body 10 is sucked into the rectifying member 70 from the intake 71, blown into the lower duct 80 through the blower chamber 61 while passing through the filter 105, and upward from the upper outlet 81 </ b> B. Discharged.
Here, as shown in FIG. 8, when the lower heat insulating door 40 is opened, the air discharged from the lower duct 80 is blown up in front of the lower opening 18 to form an air curtain A. Is done. The air curtain A prevents the cool air inside the cabinet from flowing out, and the temperature rise inside the cabinet can be minimized.
Further, as shown in FIG. 9, when the upper heat insulating door 40 is opened, the air discharged from the lower duct 80 is blown into the ventilation duct 50 of the lower heat insulating door 40 which is closed, and the inside thereof is After rising, it blows up from the upper end in front of the upper opening 18. As a result, the air curtain A is similarly formed, and it is possible to suppress the cool air inside the cabinet from flowing out.

  On the other hand, when the upper and lower heat insulating doors 40 are closed, as shown in FIG. 1, the air discharged from the lower duct 80 is passed through the ventilation duct 50 of the lower heat insulating door 40 and then the upper heat insulating door 40. The inside of the duct 50 is raised and blown up from the upper end of the upper ventilation duct 50. At this time, when the condenser fan 23A is driven especially when the refrigeration apparatus 21 is operated, the air blown from the ventilation duct 50 is condensed as cooling air while being guided by the guide plate 110. It is applied to the vessel 23 from the front side and is cooled. This cooling air is air drawn from the lower surface side of the refrigerator main body 10 and is relatively cooler than air at a high position such as around the machine room 20, so that condensation is performed efficiently.

  Moreover, between the blower outlet 81B of the lower duct 80, and the lower end of the ventilation duct 50 of the lower heat insulation door 40, and the upper end of the ventilation duct 50 of the lower heat insulation door 40, and the ventilation of the upper heat insulation door 40 Since gaps s are provided between the lower ends of the ducts 50, a part of the air rising from the lower duct 80 through the ventilation ducts 50 of the lower and upper heat insulating doors 40 leaks from the gaps s and A continuous upward flow is generated in the vicinity of the mouth edge of each opening 18, and condensation or icing on the mouth edge of each opening 18 is suppressed.

As described above, according to the present embodiment, when the heat insulating door 40 is opened, each opening is formed by air blown from the lower duct 80 on the lower side and from the ventilation duct 50 of the lower heat insulating door 40 on the upper side. The air curtain A is formed on the outer side of 18, and it is suppressed that the cool air in the cabinet flows out to the outside, and the inside of the cabinet is effectively kept cool. And since the air curtain A is formed in the outer side of the opening part 18, there is no possibility of reducing the storage capacity of the store room 15. FIG.
On the other hand, when the door is closed, the air blown out from the blower 60 rises in the ventilation duct 50 of the upper and lower heat insulating doors 40 and is directed toward the condenser 23 as cooling air while being guided by the guide plate 110. Since the cooling air is sucked on the lower surface side of the refrigerator main body 10 and has a relatively low temperature, the condenser 23 can be efficiently cooled, that is, the refrigerating capacity can be increased.

Further, when the door is closed, a part of the air rising from the blower 60 through the ventilation duct 50 of the upper and lower heat insulating doors 40 leaks from the upper and lower gaps s and a continuous upward flow is generated in the vicinity of the mouth edges of the upper and lower openings 18. , Condensation and icing are difficult to form on the rim of each opening 18. Therefore, the ability of the dew condensation prevention heater disposed on the back surface of the lip of the opening 18 can be reduced or even removed.
Furthermore, when air on the lower surface side of the refrigerator body 10 is sucked into the blower 60, the air flows along the lower surface of the refrigerator body 10 by the rectifying member 70. That is, since air that is relatively hotter than the inside air flows along the lower surface of the refrigerator main body 10, the temperature drop on the lower surface of the refrigerator main body 10 is suppressed, thereby preventing condensation on the lower surface.

Since the ventilation duct 50 of the heat insulating door 40 is provided in a state of covering the foamed resin 48 that is a heat insulating material, for example, when the heat insulating door 40 is washed with water, it is prevented from being immersed in the foamed resin 48. Since a plurality of vertical partition plates 51 are arranged in the ventilation duct 50, the air can be raised uniformly and smoothly over the entire area.
Since the decorative frame 53 is fitted to the upper end of the ventilation duct 50, it looks good when the heat insulating door 40 is opened and its upper surface is visually observed.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS.
In the second embodiment, the structure of the heat insulating door 40A is changed. First, in the ventilation duct 50A mounted in the heat insulating door 40A, as shown in FIG. 10, three notch holes 120 are formed at intervals on the left and right corners on the back surface side. On the other hand, three long holes 122 shown in the figure are opened corresponding to the left and right side edge portions of the interior plate 43A. The long holes 122 correspond to the cutout holes 120 of the ventilation duct 50A and the foamed resin 48. Are communicated by a through-passage 123 penetrating through the.

  When the heat insulating door 40A of the second embodiment is used, when the air blown from the blower 60 rises in the ventilation duct 50A of the upper and lower heat insulating doors 40A when the door is closed, a part of the air is The gas is diverted from the cutout hole 120 to the through-passage 123 and blown out from the long hole 122 and applied to the left and right mouth edges of the opening 18 of the refrigerator body 10. It is possible to effectively prevent a sudden air flow from occurring on the edge of the mouth, and condensation or icing to occur on the edge of the mouth.

<Embodiment 3>
FIG. 12 shows Embodiment 3 of the present invention.
As shown in FIG. 12, the ventilation duct 50 </ b> B disposed in the heat insulating door 40 may have a long and narrow oval shape or a cylindrical shape having an elliptical cross section. When the ventilation duct 50B has such a shape, there is an advantage that the foamed resin is more easily rotated around the ventilation duct 50B when the foamed resin 48 is filled with foam.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
(1) The cross flow fan may be driven intermittently, for example, only when it is considered to be more effective. For example, you may make it restrict | limit during the opening of the heat insulation door which needs to form an air curtain, and the driving | operation of the refrigeration apparatus (condenser fan) which requires the air for cooling.
(2) The fan provided in the blower is not limited to the cross-flow fan, as long as a flow path of air that can be sucked in from the lower surface side of the refrigerator body and blown up from the lower front surface of the refrigerator body is used. May be used.

(3) In the above embodiment, a four-door type refrigerator has been exemplified, but the heat insulating door has two doors with two upper and lower sides, the heat insulating door has three steps, six door types arranged in two left and right rows, and one door. It can be applied regardless of the number of doors, including types.
(4) Not only a refrigerator but also a freezer, a refrigerator, and the like can be widely applied to all types of cooling storages having a machine room containing a refrigeration device on the upper surface of a storage body.

The longitudinal cross-sectional view of the refrigerator which concerns on Embodiment 1 of this invention Exploded perspective view of insulated door Partial cutaway longitudinal section Sectional view of the area around the blower Sectional view cut at the mounting location Exploded sectional view The cross-sectional view Longitudinal section showing the operation when the lower insulation door is open Longitudinal sectional view showing the operation when the upper insulation door is open The perspective view of the ventilation duct which concerns on Embodiment 2. FIG. Perspective view of the insulated door The perspective view of the ventilation duct of Embodiment 3.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Refrigerator main body (storage main body) 15 ... Refrigeration room (storage room) 18 ... Opening part 20 ... Machine room 21 ... Refrigerating device 23 ... Condenser 23A ... Condenser fan 40, 40A ... Thermal insulation door 44 ... Foam resin 50, 50A 50B ... Ventilation duct 60 ... Blower device 61 ... Blower chamber 62 ... Cross flow fan 70 ... Rectifying member 71 ... Inlet 80 ... Lower duct 81B ... Blower outlet (of the lower duct 80) 110 ... Guide plate (guide means) A ... Air curtain s ... Gap

Claims (5)

It has a storage body consisting of a heat-insulating box with a front opening, and a storage chamber in which cool air is circulated and supplied. A heat insulating door is attached to the front opening of the storage body so that it can be opened and closed, and the upper surface of the storage body In the cooling storage where a machine room is provided and a refrigeration apparatus including a condenser is provided in the machine room,
A ventilation duct penetrating in the vertical direction is provided in the heat insulating door, and a blower device is provided on the lower surface of the storage body to suck in air on the lower surface side and blow it upward toward the lower end surface of the heat insulating door. In addition, the storage room is provided with guide means for directing the air blown from the upper end of the ventilation duct to the condenser. The cooling storage according to claim 1, wherein a gap is provided between a blower outlet of the blower and a lower end of a ventilation duct of the heat insulating door. The cooling storage according to claim 1, wherein a plurality of the heat insulating doors are provided side by side in the vertical direction, and the ventilation ducts are formed in alignment with each heat insulating door. A clearance is provided between the blower outlet of the blower and the lower end of the ventilation duct of the lowermost heat insulating door, and the upper end of the ventilation duct of one heat insulating door and the ventilation of the heat insulating door immediately above The cooling storage according to claim 3, wherein a gap is also provided between the lower end of the duct. The air blower is provided with a rectifying member that sucks air on the lower surface side of the storage body along the lower surface of the storage body. The cold storage according to crab.

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