JP2012047448A - Showcase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a showcase in which a cooling fan is disposed on the cooling chamber side, the cooling fan having a fan motor disposed on the mechanical chamber side is easily attached and detached and the air amount is stabilized by a fan case.SOLUTION: The showcase comprises: a display chamber constituted on the upper side of a heat insulating wall; a mechanical chamber constituted on the lower side of the heat insulating wall; a compressor of a cooling unit, a condenser, etc. disposed in the mechanical chamber; a cooling chamber constituted in the heat insulating wall; and an evaporator of the cooling unit and a cooling fan disposed in the cooling chamber, wherein the cool air thermally exchanged with the evaporator is circulated in the display chamber. The showcase further includes a bottom frame fringing the surrounding of the upper surface of the heat insulating wall, a bottom plate which is disposed on the bottom frame and divides the interior of the showcase into the display chamber and the cooling chamber, and a fan case which is located on the under side of the bottom plate and is integrally formed with the bottom frame, wherein the cooling fan is located within a grill of the fan case.

Description

  The present invention forms a display room above the heat insulating wall, forms a machine room with a compressor or the like below the heat insulating wall, forms a cooling room in the heat insulating wall, and cools the cooling room. The present invention relates to an evaporator of a unit, and a showcase in which cooling air is installed and cooling air exchanged with the evaporator is circulated into the display room by the cooling fan.

  Conventionally, in this type of showcase, left and right and rear transparent walls and front transparent doors (transparent walls) are attached to the pillars that are erected at the four corners of the heat insulating walls to insulate the display room surrounded by these transparent walls. It is constructed above the wall. A cooling chamber in which the evaporator of the cooling unit and a cooling fan are arranged is formed in the heat insulating wall, and a machine room in which a compressor, a condenser and the like are arranged is formed below the heat insulating wall. Yes. Then, by operating the compressor or the like, the evaporator exhibits a cooling action, and the cooling fan discharges cold air from one side of the heat insulating wall, sucks it from the other side, circulates the cold air into the display chamber, and The structure which cooled to the temperature of this was taken (for example, refer patent document 1).

  In such a showcase, since the display chamber is configured to be larger than the overall height, the height below the heat insulating wall is kept low. Therefore, only the cooling fan is disposed in the cooling chamber in the heat insulating wall, and the fan motor for rotating the cooling fan is disposed on the top surface of the machine room.

  In such a configuration, a hole for taking out the fan motor is formed on the bottom surface of the heat insulating wall corresponding to the mounting position of the fan motor, and the hole is closed by a heat insulating material configured similarly to the heat insulating wall. The heat insulating material is formed with a through-hole for penetrating the rotating shaft of the fan motor formed from the machine room side to the cooling room side. And the fan motor arrange | positioned at the machine room side is fixed to the top | upper surface of a machine room, ie, the top plate of a machine room, via a motor mounting plate. The cooling fan disposed on the cooling chamber side is fixed to the rotating shaft from the cooling chamber side.

  In the cooling chamber, a fan case having a grill on which a cooling fan is located is placed. Thus, when the cooling fan is operated, the cool air suppressed by the fan case is discharged into the display chamber, and the cool air circulation is performed.

JP-A-5-203332

  However, in the configuration as described above, since the fan case is only placed in the cooling chamber, there is a problem that the position easily shifts. If the fan case is displaced from an appropriate position, it becomes difficult to stably control the air volume of the cool air discharged into the display chamber, and there is a problem that the cool air cannot be properly circulated in the display chamber. Moreover, since it is not provided stably, there exists a problem that a fan case vibrates by driving | operation of a fan motor, and abnormal noises, such as a vibration sound, generate | occur | produce.

Therefore, it is conceivable to fix the fan case in the cooling chamber. However, although the cooling fan motor is attached to the top plate of the machine room, the height of the machine room cannot be secured sufficiently, so that the fan motor can be attached and detached from the machine room. There is a problem that you can not.

  That is, when performing the mounting / demounting operation of the cooling fan motor for maintenance work or the like, first, the fan case is removed, the cooling fan is removed from the rotating shaft, and a hole formed in the bottom surface of the heat insulating wall; It is necessary to remove the heat insulating material that closes the hole. Thus, the cooling fan motor is removed from the machine room by removing the motor mounting plate to which the fan motor exposed from the cooling room side is attached from the top plate of the machine room.

Therefore, in order to make the cooling fan motor disposed in the machine room detachable from the cooling room side, the fan case must be removable from the cooling room. For this reason, it has been difficult to stabilize the air volume as described above.
In addition, the operation of attaching and detaching the cooling fan motor involves an operation of disassembling a plurality of components. In particular, the hole and the heat insulating material partition the cooling chamber and the machine chamber in which dew formation occurs in a watertight manner. For this reason, since waterproof coking is applied, complicated work is forced.

  Therefore, the present invention has been made to solve the related technical problem, and it is easy to attach and detach a cooling fan in which a cooling fan is provided on the cooling chamber side and a fan motor is provided on the machine room side. In addition, the present invention provides a showcase that can realize the stabilization of the air volume by the fan case.

  The showcase of the invention of claim 1 comprises a display room above the heat insulation wall, a machine room below the heat insulation wall, and a compressor, condenser, etc. of the cooling unit in the machine room. In addition to installing a cooling chamber in the heat insulation wall, an evaporator of the cooling unit and a cooling fan are installed in the cooling chamber, and the cold air exchanged heat with the evaporator is circulated into the display chamber by the cooling fan. A bottom frame that borders the periphery of the upper surface of the heat insulating wall, a bottom plate that is provided on the bottom frame and divides the display chamber and the cooling chamber, and a bottom frame that is positioned below the bottom plate And a fan case formed integrally with the cooling fan, and the cooling fan is located in a grill of the fan case.

  The showcase of the invention of claim 2 comprises a display room above the heat insulation wall, a machine room below the heat insulation wall, and a compressor of the cooling unit, a condenser, etc. in the machine room. In addition to installing a cooling chamber in the heat insulation wall, an evaporator of the cooling unit and a cooling fan are installed in the cooling chamber, and the cold air exchanged heat with the evaporator is circulated into the display chamber by the cooling fan. A bottom frame that borders the periphery of the upper surface of the heat insulating wall, a bottom plate that is provided on the bottom frame and divides the display chamber and the cooling chamber, and a bottom frame that is positioned below the bottom plate A cooling fan motor that is positioned in the machine room and drives the cooling fan. The cooling fan motor has a rotating shaft that penetrates the heat insulating wall and faces the cooling chamber. In this state, it can be detachably attached to the machine room top plate from the side. Cooling fan is detachably mounted on the rotary shaft, characterized in that located in the grill of the fan case.

  The showcase of the invention of claim 3 is the invention according to claim 1 or claim 3, wherein the top plate is raised upward at the portion where the cooling fan motor is located, and the top plate is raised at the raised portion. The cooling fan motor is attached from the side using the shape.

According to the invention of claim 1, a display room is formed above the heat insulating wall, a machine room is formed below the heat insulating wall, and a compressor, a condenser and the like of the cooling unit are installed in the machine room. In addition, a cooling chamber is formed in the heat insulation wall, and an evaporator of the cooling unit and a cooling fan are installed in the cooling chamber, and the cool air exchanged heat with the evaporator is circulated into the display chamber by the cooling fan. A bottom frame that borders the periphery of the upper surface of the heat insulating wall, a bottom plate that is provided on the bottom frame and divides the display chamber and the cooling chamber, and is located on the lower side of the bottom plate and integrated with the bottom frame The cooling fan is positioned within the grill of the fan case, so that the fan case can be stably provided in the cooling chamber configured in the heat insulating wall.

  Therefore, it becomes possible to stably control the air pressure and the air volume by the operation of the cooling fan located in the grill of the fan case, and the cool air circulation into the display room can be appropriately executed. Moreover, since the inconvenience that the fan case rattles due to the operation of the cooling fan can be avoided, the generation of vibration noise by the fan case can be eliminated.

  The showcase of the invention of claim 2 comprises a display room above the heat insulation wall, a machine room below the heat insulation wall, and a compressor of the cooling unit, a condenser, etc. in the machine room. In addition to installing a cooling chamber in the heat insulation wall, an evaporator of the cooling unit and a cooling fan are installed in the cooling chamber, and the cold air exchanged heat with the evaporator is circulated into the display chamber by the cooling fan. A bottom frame that borders the periphery of the upper surface of the heat insulating wall, a bottom plate that is provided on the bottom frame and divides the display chamber and the cooling chamber, and a bottom frame that is positioned below the bottom plate A cooling fan motor that is positioned in the machine room and drives the cooling fan. The cooling fan motor has a rotating shaft that penetrates the heat insulating wall and faces the cooling chamber. In this state, it can be detachably attached to the machine room top plate from the side. The cooling fan is detachably attached to the rotating shaft and is located within the grill of the fan case. Therefore, when removing the cooling fan motor for maintenance or the like, first remove the bottom plate from the cooling chamber side and then remove the cooling fan. Then, the cooling fan motor fixed to the top plate of the machine room can be removed from the side of the machine room.

  This eliminates the need to form a hole for extraction in the heat insulating wall corresponding to the mounting position of the cooling fan motor and remove the fan motor from the cooling chamber side together with the heat insulating material that closes the hole. For this reason, it is possible to easily perform a complicated mounting and dismounting operation of the cooling fan motor, and it is possible to improve maintenance workability.

  In addition, since the cooling fan is mounted in the grill of the fan case that is integrated with the bottom frame, it is possible to stably control the wind pressure and air volume by operating the cooling fan. Cold air circulation can be performed appropriately. In particular, since the hole for taking out the fan motor is not formed in the heat insulating wall as in the prior art, it becomes possible to further stably control the wind pressure and the air volume due to the operation of the cooling fan.

In addition, since the fan case is provided in a cooling chamber that is stably formed in the heat insulating wall, the inconvenience of the fan case shaking due to the operation of the cooling fan can be avoided, and the generation of vibration noise due to the fan case is eliminated. can do.
According to the invention of claim 3, in the invention of claim 2 above, the top plate is raised at the portion where the cooling fan motor is located, and the shape of the top plate rising at the raised portion is utilized. Since the cooling fan motor is attached from the side, the cooling fan motor can be fixed using the inclined surface formed by the height difference between the bottom-up portion of the top plate and the other portions. Therefore, it is possible to perform fixing work such as screwing work from the side to the inclined surface, and further improvement of workability and stable fixing can be realized.

It is a perspective view of the low-temperature showcase of the Example to which this invention is applied. FIG. 2 is a partially enlarged perspective view in a state where a cooling chamber and a machine room of the low temperature showcase of FIG. 1 are exposed. It is the side view seen from the right side toward the front of the showcase of FIG. FIG. 4 is a partially enlarged vertical side view of FIG. 3. It is a perspective view of the lower part of the main body to which the bottom frame is attached. It is a perspective view of the cooling unit in a machine room in the state where the top plate of the machine room was attached. It is a perspective view of the cooling unit in a machine room. It is an expanded sectional view of a main part lower part. It is an expanded sectional view of the lower part of a main part which shows the attachment state of the fan motor for cooling.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a low-temperature showcase 1 according to an embodiment to which the present invention is applied, FIG. 2 is a partially enlarged perspective view of the low-temperature showcase 1 with the cooling chamber 24 and the machine room 2 exposed, and FIG. 4 is a partially enlarged vertical side view of FIG. 3, FIG. 5 is a perspective view of the lower part of the main body 11 to which the bottom frame 7 is attached, and FIG. 6 is a top plate of the machine room. FIG. 7 is a perspective view of the cooling unit R in the machine room 2, FIG. 8 is an enlarged sectional view of the lower part of the main body 11, and FIG. 9 is a cooling fan. The expanded sectional view of the lower part of the main body 11 which shows the attachment state of the motor 27M is shown, respectively.

  In each figure, the low-temperature showcase 1 of the embodiment is a so-called desktop type low-temperature showcase of a four-sided glass type, a container-like heat insulating wall 6 made of polyurethane foam and opened upward, and the heat insulating wall 6. The bottom frame 7 made of a hard synthetic resin that borders the periphery of the top surface of the bottom frame 7, the support columns 8... Standing upright at the four corners of the bottom frame 7, the top plate 9, the bottom frame 7, the support columns 8, And the main body 11 is comprised from the transparent walls 4 and 4 etc. of the right and left surfaces hold | maintained by the top plate 9. FIG.

  The transparent walls 4 and 4 on the left and right surfaces are made of transparent double glass, and the bottom plate 12 made of a hard synthetic resin is also formed on the heat insulating wall 6 inside the transparent walls 4 and 4 (only FIG. 8 is shown). Is detachably attached. A display chamber 3 is formed in the main body 11 between the bottom plate 12, the top plate 9, and the left and right transparent walls 4, 4.

  The front and rear surfaces of the display chamber 2 are open, and the front and rear openings are closed by doors 13 and 13 so as to be freely opened and closed. The front and rear doors 13 and 13 are the same. The doors 13 and 13 are pivotally attached to the top plate 9 and the bottom frame 7 of the main body 11 so that the upper and lower sides on the right side thereof are pivoted. The door 13 is composed of a surrounding hard synthetic resin sash 14 and the transparent double glass transparent wall 4 held on the inner side of the sash 14. That is, the handle 16 is attached to the front surface on the left side of the sash 14.

  A machine room 2 is formed below the display chamber 3 below the heat insulating wall 6, and its periphery is detachably covered with a panel 17. In the machine room 2, in addition to the compressor 18 and the condenser 19 constituting the refrigerant circuit of the cooling unit R, there are also a condenser fan 21, an evaporating dish 23, and an electrical box 25 for ventilating the outside air by air. is set up.

  In this case, the condenser 19 includes a meandering refrigerant pipe 45, a plurality of heat radiation fins 46, and tube plates 47 on both sides, and is disposed at the front (one end) in the machine room 2 and forward (outward). The direction of the radiating fins 46 is set so that air flows from the rear toward the rear (inward of the machine room 2). A flange 47A bent substantially horizontally is formed at the upper end of the tube plate 47 (see FIG. 7). The condenser fan 21 includes a motor 21M and a propeller type fan 21F attached to the rotation shaft of the motor 21M. The fan case is fixed to the rear side of the condenser 19 (inside the machine room 2). 49.

Here, the fan case 49 is made of a hard synthetic resin, and as shown in FIG. 7, the side away from the condenser 19 is high and the condenser 19 side is low when attached to the condenser 19. A grille 51 that faces the fan 21F is formed on an inclined wall 50 inclined at an angle of about 45 °. A side wall 52 is formed across the inclined wall 50 from the condenser 19 side, and a flange 49A bent substantially horizontally toward the outside is formed at the upper end of the side wall 52 and the inclined wall 50. The upper surface 49A is substantially flush with the flange 47A formed at the upper end of the tube plate 47 of the condenser 19.

As a result, when the motor 21M of the condenser fan 21 is operated and the fan 21F is rotated, outside air is sucked into the condenser 19 from the outside air inlet 22 formed in the front panel 17 corresponding to the condenser 19. The air is then cooled by the outside air.
In the present embodiment, the condenser 19 is located on the right side (one side) in the machine room 2 when viewed from the front and corresponds to the inside of the panel 17 on the front side of the machine room 2, and the condenser fan 21 is a condenser. 19 corresponds to the rear side, and the compressor 18 is located on the left back side (back side on the other side) when viewed from the front. The electrical box 25 is located on the left side (the other side) in the machine room 2 when viewed from the front and corresponds to the inside of the panel 17 on the front side of the machine room 2. Furthermore, between the electrical box 25 and the compressor 18, at least the upper part in the machine room 2 is a ceiling of the machine room 2 that covers the bottom surface of the heat insulation wall 6 and the lower side of the heat insulation wall 6 as will be described in detail later. By raising the bottom surface of the plate 44 upward, a space in which a motor 27M of a cooling fan 27 described later is attached is formed.

  On the other hand, a cooling chamber 24 is formed in the heat insulating wall 6, and an evaporator 26 and a cooling fan 27 that form a refrigerant circuit of the cooling unit R together with the compressor 18 and the like are accommodated in the cooling chamber 24. Has been. The cooling fan 27 is composed of a motor 27M and a propeller type fan 27F that is attached to a rotating shaft 55 of the motor 27M and is driven to rotate. A drain outlet (not shown) formed in the bottom of the cooling chamber 24 communicates with the evaporating dish 23.

  When the low temperature showcase 1 is viewed from the front (front side), the right bottom plate 12 is formed with a cold air inlet port 28 at the bottom of the display chamber 3 so as to extend back and forth, and the left bottom plate 12 has a cold air outlet port. 29 is located at the bottom of the display chamber 3 and is formed across the front and rear. The cold air discharge port 29 communicates with the cooling chamber 24 on the discharge side of the cooling fan 27, and the cold air suction port 28 communicates with the cooling chamber 24 on the cold air inflow side of the evaporator 26.

  Here, the bottom frame 7 that borders the periphery of the upper surface of the heat insulating wall 6 constitutes one side, in this embodiment, the inner edge portion on the right side and the corner portion on the right side when the low temperature showcase 1 is viewed from the front (front surface). A fan case 37 of the cooling fan 27 extending from the other side, that is, from the inner edge of the front surface toward the inside of the cooling chamber 24 is formed. The fan case 37 is located on the lower side of the bottom plate 12 attached over the upper peripheral edge of the bottom frame 7 and is formed integrally with the bottom frame 7, and the grill 38 facing the fan 27 </ b> F of the cooling fan 27. Is formed.

  In addition, on the front side and the rear side of the bottom frame 7, a dew receiving portion 39 that protrudes outward is formed corresponding to the lower side of the door 13 provided on the front surface and the rear surface of the display chamber 3. The dew receiving part 39 receives dew condensation water flowing down from the outer surface of the transparent wall 4 constituting the door 13. The dew receiving part 39 evaporates the received dew condensation water in the machine chamber 2 at a substantially central part. A drain hole 39 </ b> A for leading to the dish 23 is formed.

Further, in the corners of the four corners of the bottom frame 7, pillar holes having a substantially L-shaped cross section (not shown) for penetrating the pillars 8 having a substantially L-shaped cross section are formed.
On the other hand, the top plate 44 of the machine room 2 covering the lower side of the heat insulating wall 6 has a substantially rectangular cross section opened upward as shown in FIG. The top plate 44 is made of a steel plate material that covers the lower and side surfaces of the heat insulating wall 6. In this embodiment, the top plate 44 is formed by bending a single steel plate as a whole into a substantially rectangular box shape. ing.

  That is, the front end and the rear end of one steel plate are bent upward at a substantially right angle to form a front wall 44A and a rear wall 44B having predetermined dimensions in the vertical direction, and both side ends of the steel plate are set at a substantially right angle upward. The side walls 44C and 44D of the top plate 44 are formed by bending. Here, the heat insulating wall 6 is one side of the bottom wall, and in this embodiment, the left side of the showcase 1 when viewed from the front forms a space for mounting the motor 27M of the cooling fan 27. It is made the shape.

  Therefore, the bottom surface of the top plate 44 is one side, here, the left side when the showcase 1 is viewed from the front is an inclined surface 44E that is bent upward at a predetermined angle by cutting and raising, The upper end portion is a bottom-up portion 42 bent so as to be substantially horizontal toward the outside, and the end portion forms the side wall 44C bent upward at a substantially right angle. Thereby, the bottom face of the top plate 44 is formed along the shape of the bottom face of the heat insulating wall 6.

Further, both side ends of the front wall 44A and the rear wall 44B are formed with flanges bent inward at substantially right angles, and the side walls 44C and 44D overlapped with the flanges are fixed by screws. Corner portions 43 are formed at the four corners of the top plate 44.
Thereby, the top plate 44 is configured by bending a single steel plate as a whole into a substantially rectangular box shape, so that a predetermined strength of the top plate 44 itself can be ensured. At this time, since the front wall 44A and the rear wall 44B are formed with predetermined dimensions in the vertical direction, each corner 43 has a predetermined dimension in the vertical direction. In the present embodiment, the front and rear walls 44A, 44B and the side walls 44C, 44D are erected upward to form the corner portion 43. However, the present invention is not limited to this, and only the four corners erected upward. The corner portion 43 may be configured.

Furthermore, upper edges 44F are formed at the upper ends of the front wall 44A and the rear wall 44B so as to be bent substantially outward at right angles, and the upper edges 44F are provided around the upper surface of the heat insulating wall 6. The bottom frame 7 is fixed by screwing in contact with the lower surface of the dew receiving portion 39.
In addition, vertical support sides 41 and 41 are formed by cutting and raising the front and rear walls (side walls) 44A and 44B of the top plate 44 corresponding to the raised portion 42 of the top plate 44. Enters the lower side of the bottom raised portion 42 to support the bottom raised portion 42.

  Therefore, as will be described later, even if the motor 27M of the cooling fan 27 is attached to the bottom surface of the bottom raised portion 42 of the top plate 44, the bottom raised portion 42 is stably held from the lower side by the support side 41 in the vertical direction. It is possible to avoid the inconvenience that the bottom raising portion 42 constituted by bending hangs down due to the weight of the motor 27M.

  The bottom raised portion 42 has a cooling portion which is located on the rear side from the upper side of the electrical box 25 and on the front side from the upper side of the compressor 18 and is cut and raised at a substantially right angle toward the lower side. A fan mounting side 40 is formed. A shaft through hole 42A for penetrating the rotating shaft 55 of the cooling fan 27 is formed in the vicinity of the mounting side 40, here, between the mounting side 40 and the inclined surface 44D. A shaft through hole 6 </ b> A is also formed in the bottom wall of the heat insulating wall 6 at a position overlapping with the shaft through hole 42.

On the other hand, the fan 27F of the cooling fan 27 as described above is provided in the grill 38 of the fan case 37 provided in the cooling chamber 24, and the motor 27M is provided on the top plate 44 located on the machine chamber 2 side. It is attached via a mounting plate 56.
The mounting plate 56 holds the motor 27M on the lower surface, and has a mounting side 57 whose one end is bent downward at a substantially right angle, and a mounting side 58 whose other end is formed obliquely downward at a predetermined angle. ing. The attachment side 57 can be attached along the inner surface of the attachment side 40 formed on the bottom raising portion 42 of the top plate 44, and the attachment side 58 can be attached along the lower surface of the inclined surface 44E of the top plate 44. Has been.

  As a result, the cooling fan 27 first attaches the motor 27M to the attachment plate 56 as shown in FIG. The rotating shaft 55 extending from the motor 27M is inserted into the shaft through hole 42A formed in the top plate 44 and the shaft through hole 6A formed in the heat insulating wall 6, and the end portion of the rotating shaft 55 is inserted into the heat insulating wall 6. It faces the cooling chamber 24. In this state, the mounting plate 56 attached to the motor 27M comes into contact with the bottom surface of the bottom raised portion 42 of the top plate 44, and the mounting side 57 of the mounting plate 56 is superposed on the mounting side 40 formed on the top plate 44. The attachment side 58 of the plate 56 is superposed along the inclined surface 44E of the top plate 44.

  Therefore, the side of the machine room 2, in this embodiment, the mounting sides 40 and 56 provided facing the left side from the front of the showcase 1, and the inclined surface 44E and the mounting side 58 are screwed respectively. Thus, the fan motor 27M is fixed to the lower surface of the heat insulating wall 6, that is, the lower surface of the top plate 44 of the machine room. Then, the fan 27F is fixed to the end portion of the rotating shaft 55 provided facing the cooling chamber 24 by the fixture 30.

  The assembly procedure of the showcase 1 will be described with the above configuration. First, the condenser 19, the condenser fan 21, the fan case 49 for the condenser fan, the compressor 18, the electrical box 25, the evaporating dish 23, and the like are arranged on the upper surface of the unit base 60 constituting the bottom surface of the machine room 2. The flanges 47A and 47 formed at the upper ends of the tube plates 47 and 47 of the condenser 19 and the flange 49A formed at the upper end of the fan case 49 formed substantially flush with the flange 47A and The top plate 44 is placed and fixed. Then, the heat insulating wall 6 is attached above the top plate 44. The top plate 44 attached to the heat insulating wall 6 may be placed and fixed on the upper end of the condenser 19 or the like.

  Thereby, since the heat insulation wall 6 and the top plate 44 were hold | maintained on the condenser 19, the heat insulation wall 6 etc. are stably hold | maintained on the tube plate 47 of the condenser 19 stably mounted with respect to a perpendicular direction. It becomes possible. Therefore, it is possible to eliminate the angles provided at the four corners of the lower surface of the heat insulating wall 6 in order to hold the heat insulating wall 6 as in the prior art, and it is possible to reduce the number of parts and improve the productivity.

In the present embodiment, the heat insulating wall 6 and the like can also be held by the upper end of the fan case 49 that is substantially flush with the upper end of the tube plate 47 of the condenser 19. Therefore, the top plate 44 of the machine room that covers the heat insulating wall 6 and the lower surface of the heat insulating wall 6 can be held more stably.
Thereafter, the bottom frame 7 that borders the periphery of the upper surface of the heat insulating wall 6 is attached to the heat insulating wall 6. At this time, since the fan case 37 is integrally formed on the bottom frame 7 as described above, the fan case 37 is disposed in the cooling chamber 24 by attaching the bottom frame 7.

And the dew receiving part 39 formed in the front edge part and the rear edge part of the said bottom frame 7, the upper edge part 44F of the front wall 44A of the top plate 44 of the machine room 2, and the upper edge part 44F of the rear wall 44B. Contact and fix.
The evaporator 26 is disposed in the cooling chamber 24, and the cooling fan 27 is attached as described in detail above. The bottom plate 12 is placed on top of the bottom frame 7 so as to close the upper surface of the cooling chamber 24.

  As described above, after assembling the cooling unit R, the support frame 8 is attached to the bottom frame 7, the heat insulating wall 6, and the four corners of the machine room 2, and the transparent wall 4 and the door 13 are attached to the support column 8. A top plate 9 is attached to form a display chamber 11 inside. A column 8 having a substantially L-shaped cross section is inserted into the column hole formed in the bottom frame 7, and the end penetrates through the machine chamber 2 to reach the four corners of the unit base 60. Fix to the four corners of 60 by screws.

At this time, the support column 8 having a substantially L-shaped cross section is attached along the corners 43 of the top plate 44 of the machine room 2. Therefore, the corner portion 43 of the top plate 44 and the support column 8 can be brought into contact with each other for a long time across the vertical width constituting the corner portion 43. Therefore, the support in the vertical direction of the support column 8 can be realized by the corner portion 43 of the top plate 44 formed wide in the vertical direction. And stable mounting can be realized. Therefore, the opening and closing operation of the door 13 that closes the front and rear surfaces of the display chamber 3 so as to be openable and closable makes it possible to avoid inconvenience that the entire showcase 1 is inclined and the door is lowered.

Moreover, since the top plate 44 to which the support column 8 is attached is fixed to the tube plate 47 of the condenser 19 as described above, the support column 8 and the entire showcase 1 are supported more stably. It becomes possible to do.
In addition, according to the present embodiment, the support column 8 extending upward can be attached after the cooling unit R is assembled, so that the assembling work can be easily performed and the workability can be improved. Can be planned.

  Furthermore, the bottom frame 7 comes into contact with the upper edge portions 44F of the front wall 44A and the rear wall 44B of the top plate 44 formed by rising from the lower surface of the heat insulating wall 6, and is fixed by screwing. The height dimension from the upper end to the unit base 60 can be made constant, and variations in the height dimension of the entire showcase 1 can be eliminated.

  With the above configuration, when the compressor 18, the condenser fan 21, and the cooling fan 27 are operated, the evaporator 26 exhibits a cooling action. In addition, the condenser 19 and the compressor 18 generate heat and heat the surrounding air. The cool air in the cooling chamber 24 cooled by exchanging heat with the evaporator 26 is sucked by the cooling fan 27 and discharged from the cool air discharge port 29 into the upper display chamber 3 (FIG. 8). The cool air discharged into the display chamber 3 rises, circulates within the display chamber 3 and cools to a predetermined temperature, and then descends and returns to the cooling chamber 24 from the cool air suction port 28. Then, after flowing in and cooled by the evaporator 26, it is again sucked into the cooling fan 27 and discharged from the cold air discharge port 29.

  Thereby, the inside of the display chamber 3 is cooled to a predetermined temperature (usually a refrigeration temperature of + 5 ° C. to + 10 ° C.). At this time, in this embodiment, the fan case 37 in which the fan 27F of the cooling fan 27 is provided is formed integrally with the bottom frame 7, so that the inside of the cooling chamber 24 stably configured in the heat insulating wall 6 is provided. Can be provided.

  Therefore, it becomes possible to stably control the wind pressure and the air volume by the operation of the cooling fan 27 located in the grill 38 of the fan case 37, and the cool air circulation into the display chamber 3 can be appropriately executed. . In addition, since the inconvenience that the fan case 37 rattles due to the operation of the cooling fan 27 can be avoided, the generation of vibration noise by the fan case 37 can be eliminated.

  By cooling the display chamber 3, the left and right transparent walls 4 and 4 surrounding the display chamber 3 and the transparent walls 4 and 4 of the doors 13 and 13 are also cooled. Therefore, moisture in the outside air is condensed on the outer surface of each transparent wall 4, flows down along the outer surface of the transparent wall 4, and flows into the dew receiving part 39 formed on the bottom frame 7 as it is.

  The condensed water that has flowed into the dew receiving part 39 passes through the dew receiving part 39 and flows into the cooling chamber 24 and is discharged to the evaporating dish 23 together with the defrosted water of the evaporator 26 and the like. Further, since the waste heat from the compressor 18 and the condenser 19 in the machine room 2 is transmitted to the dew receiving part 39 via the top plate 44 of the machine room 2, the waste heat in the machine room 2 is transmitted. The dew condensation water received in the dew receiving part 39 can be heated by using this, and evaporation can be promoted.

  On the other hand, maintenance work for the fan motor 27M of the cooling fan 27 may be performed due to the use over time or the occurrence of failure. In this case, the bottom plate 12 is removed, the fixture 30 that fixes the fan 27F to the rotating shaft 55 is removed from above the fan case 37, and the fan 27F is removed. Thereafter, the panel 17 that surrounds the outer periphery of the machine room, in particular, the panel on the side facing the mounting sides 40 and 57 used for mounting the motor 27M of the cooling fan 27, in this embodiment, the left panel as viewed from the front. 17 is removed.

  Then, a tool is inserted from the side of the machine room 2 and screwed (fixed) to the attachment sides 40 and 57 for fixing the motor 27M to the lower surface of the top plate 44 and screwed to the inclined surface 44D and the fixed side 58 ( Release (fixed). As a result, the mounting plate 56 for fixing the motor 27M to the top plate 44 is removed from the lower surface of the top plate 44, the motor 27M is pulled down together with the mounting plate 56, and the rotary shaft 55 is pulled out from the shaft through holes 6A and 42A. Thus, the motor 27M can be removed from the machine room 2.

After the motor 27M is individually replaced or maintained, the motor 27M is attached to the lower surface of the top plate 44 of the machine room 2 and the fan 27F is attached from the cooling chamber 24 side in reverse order.
As described above, the attaching / detaching operation of the top plate 44 of the machine room 2 of the motor 27M can be performed from the side of the machine room 2. Therefore, in a model in which the height dimension of the machine room 2 is not sufficiently secured and work is difficult, conventionally, a hole for extraction is formed in the heat insulating wall corresponding to the mounting position of the cooling fan motor, Although the work of removing the fan motor from the cooling chamber side is performed together with the heat insulating material that closes the hole, it is not necessary to adopt such a structure.

  Therefore, it is possible to simplify the complicated mounting and dismounting work of the cooling fan motor 27M, and it is possible to improve the maintenance workability. In addition, since it is not necessary to form a hole for removing the fan motor as described above in the heat insulating wall 6, it is possible to eliminate the need for a special waterproof process, and to reduce the wind pressure and the air volume due to the operation of the cooling fan 27. It becomes possible to control stably.

  In particular, in this embodiment, the top plate 44 is raised at the portion where the cooling fan motor 27M is located, and the shape of the top plate 44 rising at the bottom raised portion 42 is used to cool the cooling fan motor from the side. Since 27M is attached, the cooling fan motor 27M can be fixed using the inclined surface 44E formed by the difference in height between the raised portion 42 of the top plate 44 and other portions. Accordingly, fixing work such as screwing work can be performed from the side with respect to the inclined surface 44E, and further improvement in workability and stable fixing can be realized.

  The showcase according to the present invention is not limited to the configuration shown in the above-described embodiment, but can be applied to various forms, and includes various forms within the technical scope of the present invention.

R Cooling unit 1 Low temperature showcase 2 Machine room 3 Display room 4 Transparent wall 6 Heat insulating wall 6A Shaft through hole 7 Bottom frame 8 Post 9 Top plate 12 Bottom plate 13 Door 17 Panel 18 Compressor 19 Condenser 21 Condenser fan 24 Cooling chamber 27 Cooling fan 27F Fan 27M Motor 37 Fan case (cooling fan)
38 Grill 39 Dew receiving portion 40 Mounting side 41 Support side 42 Bottom raising portion 43 Corner portion 44 Machine room top plate 44A Front wall 44B Rear wall 44C, 44D Side wall 44E Inclined surface 44F Upper edge 47 Tube plate 47A Flange 49 Fan case (For condenser)
49A Flange 50 Inclined wall 55 Rotating shaft 56 Mounting plate 57, 58 Mounting side 60 Unit base

Claims (3)

A display room is formed above the heat insulation wall, a machine room is formed below the heat insulation wall, and a compressor, a condenser, and the like of the cooling unit are installed in the machine room, and the heat insulation wall is provided in the heat insulation wall. Constitutes a cooling chamber, and is installed in the cooling chamber by installing the evaporator of the cooling unit and a cooling fan, and circulating the cool air exchanged with the evaporator by the cooling fan into the display chamber. In case
A bottom frame bordering the periphery of the upper surface of the heat insulating wall; a bottom plate provided on the bottom frame to partition the display chamber and the cooling chamber; and formed integrally with the bottom frame below the bottom plate. A showcase, wherein the cooling fan is located in a grill of the fancase. A display room is formed above the heat insulation wall, a machine room is formed below the heat insulation wall, and a compressor, a condenser, and the like of the cooling unit are installed in the machine room, and the heat insulation wall is provided in the heat insulation wall. Constitutes a cooling chamber, and is installed in the cooling chamber by installing the evaporator of the cooling unit and a cooling fan, and circulating the cool air exchanged with the evaporator by the cooling fan into the display chamber. In case
A bottom frame bordering the periphery of the upper surface of the heat insulating wall; a bottom plate provided on the bottom frame to partition the display chamber and the cooling chamber; and formed integrally with the bottom frame below the bottom plate. A fan case, and a cooling fan motor that drives the cooling fan located in the machine room,
The cooling fan motor is detachably attached to the top plate of the machine room from the side with its rotating shaft passing through the heat insulating wall and facing the cooling chamber, and the cooling fan is A showcase that is detachably attached to the rotating shaft and is located in a grill of the fan case.   The top plate is raised at a position where the cooling fan motor is located, and the cooling fan motor is attached from the side by using the shape of the top plate rising at the raised portion. The showcase according to claim 2.

Images