JP3670154B2 - Equipment with refrigeration mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus having a refrigeration mechanism, and more particularly to an apparatus having a refrigeration mechanism that can efficiently cool a condenser disposed in a machine room by air sucked from outside. It is.
[0002]
[Prior art]
A refrigerated showcase having a vertically long cabinet that stores and displays food, beverages and the like in a refrigerated state at a grocery store or a convenience store is suitably used. In this refrigerated showcase, a storage room for storing cold food and a machine room are vertically defined in a box-shaped main body (cabinet) formed vertically. Inside the machine room, a refrigeration mechanism consisting of a condenser, a cooling fan, a compressor, etc. and an electrical equipment box that houses various electrical components are arranged. The refrigeration mechanism cools the cooler for cooling the storage room. It is supposed to be. As the condenser, a fin-and-tube type is generally used, and forced air cooling of the heat generating parts such as the condenser and the compressor is performed by operation of a cooling fan disposed between the condenser and the compressor.
[0003]
In a refrigerated showcase equipped with an air-cooled condenser as described above, a plurality of air inlets are generally formed in the side panel covering the side of the machine room at positions facing the condenser, and the machine room is defined. A discharge port is formed in each of the opposite side panel and rear panel. Then, the external air sucked from the suction port by the rotation of the cooling fan first contacts the condenser to cool it, and then touches the compressor to cool it, and then cools from each discharge port as hot air (air). It is designed to be discharged outside.
[0004]
[Problems to be solved by the invention]
In the refrigerated showcase, an opening for performing maintenance of the refrigeration mechanism is opened in the front of the machine room in the main body, and this opening is configured to be opened and closed by a front panel. In this case, there is a gap between the condenser disposed in the machine room and the front panel, and a part of the warm air blown out from the cooling fan is again returned from the suction side of the condenser through the gap. A so-called wraparound phenomenon was generated. In such a case, the effective cooling of the heat generating parts such as the condenser and the compressor is hindered, and there is a serious problem that the cooling capacity is lowered due to insufficient cooling of the condenser. Further, it is pointed out that the internal temperature of the machine room is increased due to insufficient cooling of the heat generating part, and various electrical components housed in the electrical box generate heat and cause malfunction or failure.
[0005]
In the refrigerated showcase, the outside of the door disposed in the main body is configured to open and close the front opening of the storage room so that the front opening of the storage room can be opened and closed due to the difference between the internal temperature of the storage room and the outside air temperature and humidity during the cooling operation. Condensation on the surface (front surface) is inevitable, and this condensed water may flow down the outer surface of the door and reach the front panel. In this case, a gap is inevitably formed in the overlap between the front panel and the main body, which is detachably attached to the main body. Condensed water infiltrates into the machine room from this gap and is arranged inside. There is a possibility that the electrical components and the connection portion of the electrical box that has been used will get wet and cause corrosion, electric leakage, and the like. In addition, the cleaning water for cleaning the main body may enter the machine room through the gap between the front panel and the main body, which may similarly cause corrosion, electric leakage, etc. of electrical components and connection parts.
[0006]
Since the front panel generally has an upper portion and a lower portion fixed to the main body via a plurality of screws, there is a problem that the screwing work increases. In addition, when attaching or detaching, it is necessary for the operator to support the front panel with hands, knees, or the like until the upper or lower screws are fixed, which is complicated.
[0007]
OBJECT OF THE INVENTION
The present invention has been proposed in view of the above-mentioned drawbacks inherent in the prior art, and has been proposed to suitably solve this problem, and achieves efficient cooling of the condenser disposed in the machine room. Another object of the present invention is to provide an apparatus including a refrigeration mechanism that can prevent the occurrence of corrosion, electric leakage, and the like of electrical components due to condensed water.
[0008]
[Means for Solving the Problems]
In order to overcome the above-mentioned problems and achieve the intended purpose, an apparatus equipped with a refrigeration mechanism according to the present invention includes:
A machine room defined inside the main body is equipped with a refrigeration mechanism consisting of a compressor, a condenser, etc., and a cooling fan provided adjacent to the condenser is rotated through a plurality of suction holes formed in the main body. In the device that sucks in external air and performs the air cooling action of the condenser and discharges the air after heat exchange to the outside through a plurality of discharge ports provided in the main body,
On the front side of the fan cover that surrounds the cooling fan, an electrical box is arranged in a posture in which the arrangement surface of various operation parts faces the front side,
On the rear surface of the machine room side of the front panel that opens and closes the opening that opens to the front of the machine room, a shielding member that abuts the installation surface of the electrical box and surrounds various operation parts is provided. It is characterized by that.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, a preferred embodiment of the apparatus having the refrigeration mechanism according to the present invention will be described below with reference to the accompanying drawings. In the embodiment, a refrigerated showcase will be described as an apparatus having a refrigeration mechanism. However, the present application is not limited to this, and the apparatus having a refrigeration mechanism may be various refrigerators or ice makers. May be.
[0010]
As shown in FIGS. 2 and 3, a refrigerated showcase 10 according to an embodiment includes a vertically long box-shaped main body 11 with a storage chamber 12 for refrigeration of food, beverages, etc., and a freezing mechanism. 13 and the machine room 15 that houses the electrical box 14 are defined in a vertical relationship. The upper storage chamber 12 is defined inside a heat insulating box 16 formed by filling a foam heat insulating material such as urethane between the interior plate and the exterior plate. As shown in FIG. 3, a rectangular opening 16a that opens to the front is formed in the front portion of the heat insulating box 16, and the inner circumferential upper and lower portions of the opening 16a have a total length in the width direction. The upper rail 17 and the lower rail 18 made of synthetic resin are disposed correspondingly. A front door 19 and a rear door 20 are supported between the rails 17 and 18 so as to be slidable in the width direction, and the opening 16a can be opened and closed.
[0011]
The upper ends of the columns 21 are bolted to the four corners of the lower surface of the heat insulation box 16, and the lower ends of the four columns 21 are arranged at the lower horizontal portion 21 a of the base plate 22 on which the refrigeration mechanism 13 is installed. These are fixed to the upper side (the inner bottom surface of the machine room 15) via bolts 23 with a head 23a protruding (see FIG. 1). The lower ends of the left and right side panels 24 and 25 and the rear panel 26 disposed on the left and right side surfaces and the rear surface of the heat insulating box 16 extend to the base plate 22, so that the base plate 22 and the heat insulating box are provided. A machine room 15 is defined between the body 16 and the body 16. Further, in the right side panel 25 located on the right side in FIG. 2, a plurality of suction ports 27 are formed at positions corresponding to the machine room 15, and the left side panel 24 located on the left side similarly includes the machine room. A plurality of discharge ports (not shown) are formed at positions corresponding to 15.
[0012]
As shown in FIG. 3, a cooler 28 in which refrigerant is circulated and supplied from the refrigeration mechanism 13 and a fan 29 for circulating cold air are disposed below the inside of the heat insulating box 16, and air is supplied by operating the fan 29. The storage chamber 12 is configured to be cooled by cold air. On the base plate 22, as shown in FIG. 1, a condenser 30 constituting a refrigeration mechanism 13 for cooling the cooler 28, a plurality (two in the embodiment) of cooling fans 31 and a compressor 32 are provided. Are arranged in order from the right side to the left side of the machine room 15. The cooling fan 31 is surrounded by a fan cover 33 that covers the outlet side (left side) of the condenser 30, and efficiently guides the external air sucked from the suction port 27 of the right side panel 25 to the condenser 30. Constructed like a jump. The height dimension of the condenser 30 and the fan cover 33 is set slightly smaller than the height dimension of the machine room 15, and is between the upper surface of the condenser 30 and the fan cover 33 and the bottom surface of the heat insulating box 16. Only a small gap is defined.
[0013]
On the front side of the fan cover 33, an electrical box 14 containing electrical components such as a microcomputer board for controlling the operation of the refrigerated showcase 10 is disposed so as to be in contact with the cover 33. The installation surface (front surface) facing the front side of the electrical box 14 is provided with operation units such as a temperature setting knob 34 and a power switch 35 for operating the internal electrical components. The operation unit is operated from the front side. Configured to obtain.
[0014]
On the front side of the machine room 15, an opening 36 that opens forward is defined by the heat insulating box 16, the left and right support columns 21 and 21, and the base plate 22. The temperature setting knob 34 and the power switch 35 can be operated and the refrigeration mechanism 13 can be maintained. The opening 36 is configured to be openable and closable by a front panel 37. As shown in FIG. 4, the front panel 37 extends horizontally rearwardly on a lower rear surface (a surface facing the machine room 15) of a rectangular front plate 38 set to a size capable of covering the opening 36. The support part 39 to be extended is formed with a predetermined length in the width direction of the opening 36. The support portion 39 is inserted into the machine room 15 through the opening 36 and is placed in contact with the upper surface of the base plate 22 via the lower end horizontal portion 21a of the support column 21. In this state, the upper portion of the front plate 38 is It is set so as to contact the front surface of the lower rail 18. Further, the support portion 39 is loosely fitted to each head portion 23a at a position corresponding to the head portions (projections) 23a, 23a of the bolts 23, 23 for fixing the front left and right support columns 21, 21 to the base plate 22. Through holes 39a set to have possible inner diameters are formed (see FIG. 7). Then, each through hole 39a is loosely fitted to the head 23a of the corresponding bolt 23, and the upper portion of the front plate 38 is in contact with the front surface of the lower rail 18, and the upper portion of the front plate 38 is covered with a plurality of cosmetics. The front panel 37 is fixed to the main body 11 by screwing and fixing to the lower rail 18 via the screws 40.
[0015]
The projecting height of the head 23a from the bottom of the machine room in the bolt 23 is such that a through hole 39a is formed in the head 23a as shown in FIG. The dimensions are set such that the front panel 37 can be engaged to hold the front panel 37 in an oblique posture in which the upper end is separated from the main body 11. That is, when the front panel 37 is attached to or detached from the main body 11, the operator can perform the work without supporting the front panel 37 with a hand, knee or the like.
[0016]
On the rear surface of the front panel 37, as shown in FIGS. 1 and 4, a pair of side shields 41, 42 and side shields 41, 42 that are spaced apart in the width direction are provided at positions corresponding to the electrical equipment box 14. A shielding member 44 composed of an upper shielding body 43 located between the upper ends of the two is disposed. The shielding member 44 is set so that its rear surface comes into contact with the installation surface (front surface) of the electrical box 14 when the opening 36 is closed by the front panel 37. The upper end of the shielding member 44 extends to the vicinity of the upper end of the electrical box 14, shields the gap defined between the electrical box 14 and the front panel 37, and after the heat exchange blown out from the cooling fan 31. The warm air (air) is prevented from entering the air suction side of the condenser 30. The shielding member 44 is made of an elastic member such as a soft synthetic resin or rubber so that its projecting dimension is larger than the designed gap, and the processing accuracy and assembly accuracy of the front panel 37 and the electrical equipment box 14 are set. Therefore, even if there is a variation in the gap, the gap can be shielded by always contacting the arrangement surface of the electrical box 14.
[0017]
The lower ends of the side shields 41 and 42 are in contact with the support 39, and the electric box 14 is arranged between the shield member 44 and the support 39 in a state where the opening 36 is closed by the front panel 37. It is configured to surround the operation unit such as the temperature setting knob 34 and the power switch 35 facing the installation surface. That is, even if the dew condensation water and the washing water flowing down the doors 19 and 20 enter the machine room 15 through the gap between the front panel 37 and the lower rail (main body 11) 18, these waters operate the electrical equipment box 14. It is designed to reliably prevent it from getting wet on the part. In addition, as shown in FIG. 6, the left and right side shields 41 and 42 are set to have different height dimensions, and the upper shield 43 is configured to incline in the width direction. Thereby, the dew condensation water and washing water which have entered the machine room 15 can be received by the inclined upper shield 43 and quickly flowed down.
[0018]
[Effect of the embodiment]
Next, the operation of the refrigerated showcase according to the embodiment will be described. When the cooling fan 31 is rotated, external air is sucked into the machine chamber 15 through a plurality of suction ports 27 formed in the right side panel 25 as shown in FIG. The air is sucked in from the air suction side of the condenser 30 to exchange heat, and then blown out from the cooling fan 31 toward the compressor 32. After heat exchange with the compressor 32, the left side surface It is discharged to the outside through a discharge port formed in the panel 24.
[0019]
As described above, as shown in FIGS. 1 and 4, the shielding member 44 of the front panel 37 is in contact with the front surface of the electrical box 14 disposed on the front side of the fan cover 33. The gap between them is shielded over substantially the entire height of the machine room 15. Therefore, it is possible to effectively prevent the sneak phenomenon in which the air after heat exchange blown from the cooling fan 31 moves through the gap and is sucked again from the air suction side of the condenser 30. Thereby, insufficient cooling of the heat generating parts such as the condenser 30 and the compressor 32 due to overheating in the machine room can be prevented, and efficient operation of the condenser 30 and the compressor 32 can be achieved. Further, it is possible to effectively prevent the occurrence of malfunction and failure by suppressing the heat generation of various electrical components housed in the electrical box 14.
[0020]
When the condensed water generated in the doors 19 and 20 by the operation of the refrigerated showcase 10 flows down to the upper end of the front panel 37, the condensed water enters the machine room 15 through the gap between the panel 37 and the lower rail 18. Further, cleaning water used for cleaning the refrigerated showcase 10 may enter the machine room 15 through a gap between the front panel 37 and the lower rail 18. In this case, in the refrigerated showcase 10 according to the embodiment, the operation parts such as the temperature setting knob 34 and the power switch 35 provided on the surface where the electrical equipment box 14 is disposed are surrounded by the shielding member 44. It is possible to prevent the dew condensation water and cleaning water that has entered from the outside from splashing on the operation unit, and it is possible to prevent the occurrence of corrosion and electric leakage of electrical components. Furthermore, since the upper shielding body 43 in the shielding member 44 is inclined, the dew condensation water and the washing water flow quickly without accumulating on the upper part of the shielding member 44. Since the shielding member 44 is formed of an elastic member such as soft synthetic resin or rubber, the size of the gap varies depending on the processing accuracy and assembly accuracy of the front panel 37 and the electrical box 14. However, the gap can be shielded by always abutting against the arrangement surface of the electrical box 14.
[0021]
When the maintenance of the refrigeration mechanism 13 disposed in the machine room 15 or the operation part of the electrical box 14 is operated, it is necessary to remove the front panel 37 from the main body 11. In this case, the front panel 37 according to the embodiment can hold the through hole 39a of the support portion 39 obliquely in a state where the through hole 39a is engaged with the head portion 23a of the bolt 23 in the machine chamber 15 (see FIG. 5). The operator does not need to support the front panel 37 using hands, knees, or the like, and can easily remove or attach the panel 37. Further, the front panel 37 can be prevented from being accidentally dropped on the floor surface during installation or removal, and the panel 37 can be prevented from being damaged. Further, as a protrusion for supporting the lower portion of the front panel 37, a head 23a of a bolt 23 for fixing the support columns 21 and 21 for defining the machine room 15 to the base plate 22 is used. Since fixing is possible by screwing at a plurality of locations, the number of parts (the number of decorative screws 40) can be reduced, and the number of man-hours for installation and removal can be reduced.
[0022]
Since the shielding member 44 is disposed on the front panel 37, the shielding member 44 does not interfere with the operation or maintenance of the operation unit when the panel 37 is removed. In addition, since the front panel 37 and the shielding member 44 are integrated, it is not necessary to separately provide a lid that covers the installation surface of the electrical box 14.
[0023]
In the embodiment, the shielding member is composed of the three shielding bodies on the left, right, and top, but may be composed of four shielding bodies on the left, right, and top and bottom. Each shield may be a separate body or an integral body. Further, in the embodiment, the case where two cooling fans are provided has been described, but the number of fans may be one or three or more. In the embodiment, the front panel is screwed to the lower rail, but the upper portion of the panel may be screwed to the main body (heat insulating box).
[0024]
【The invention's effect】
As described above, according to the apparatus provided with the refrigeration mechanism according to the present invention, the front panel shielding member disposed on the front side of the electrical box disposed on the front side of the fan cover is brought into contact with the gap between the two. Since the air after the heat exchange blown out from the cooling fan is sucked in again from the air suction side of the condenser, it is possible to effectively prevent the sneaking phenomenon. Thereby, insufficient cooling of the heat generating parts such as the condenser and the compressor due to overheating in the machine room can be prevented, and efficient operation of the condenser and the compressor can be achieved. In addition, there is an effect that the generation of malfunctions and failures can be effectively prevented by suppressing the heat generation of various electrical components housed in the electrical box.
[0025]
Since the operation part provided on the installation surface of the electrical box is surrounded by a shielding member, it is possible to prevent dew condensation water and cleaning water that has entered the machine room from the gap between the front panel and the main body from entering the operation part. It is possible to prevent the occurrence of corrosion and leakage of electrical components. Further, since the shielding member 44 is formed of an elastic member, even if there is a gap in the gap due to the processing accuracy or assembly accuracy of the front panel or the electrical equipment box, the shielding member 44 is always in contact with the installation surface of the electrical equipment box. The gap can be shielded.
[0026]
Since the front panel can be held obliquely with the through hole of the support portion engaged with the protrusion in the machine room, it is not necessary for the operator to support the front panel using a hand, knee or the like. Can be removed and attached easily. And since the head part of the volt | bolt which fixes the support | pillar for defining a machine room to a base plate as a protrusion is utilized, a number of parts and work man-hours can be reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional plan view showing a refrigerated showcase according to an embodiment of the present invention.
FIG. 2 is a front view showing the refrigerated showcase of the embodiment with a part cut away.
FIG. 3 is a side view showing a part of the refrigerated showcase of the embodiment in a longitudinal section.
FIG. 4 is a side cross-sectional view of a main part shown in a state where a front panel is fixed to the main body of the embodiment.
FIG. 5 is a cross-sectional side view of a main part shown in a state where the front panel is held obliquely with respect to the main body of the embodiment.
FIG. 6 is a rear view of the front panel of the embodiment.
FIG. 7 is a cross-sectional side view of an essential part showing an engagement portion between a front panel and a bolt head according to an embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Main body, 13 Refrigeration mechanism, 14 Electrical box, 15 Machine room, 21 Support 22 Base plate, 23 Bolt, 23a Head (projection), 27 Suction port, 30 Condenser 31 Cooling fan, 32 Compressor, 33 Fan cover 34 Temperature setting knob (operation unit), 35 Power switch (operation unit)
36 opening part, 37 front panel, 38 front plate, 39 support part 39a through hole, 44 shielding member

Claims (5)

The machine room (15) defined inside the main body (11) is provided with a refrigeration mechanism (13) composed of a compressor (32), a condenser (30), etc., and is provided adjacent to the condenser (30). By rotating the cooling fan (31), external air is sucked through the plurality of suction ports (27) drilled in the main body (11) to perform the air cooling action of the condenser (30), and the air after heat exchange is In the device that discharges to the outside through a plurality of discharge ports provided in (11),
On the front side of the fan cover (31) that surrounds the cooling fan (31), an electrical box (14) is arranged with the orientation of the operation parts (34, 35) facing the front side,
On the rear surface of the machine room side of the front panel (37) that opens and closes the opening (36) that opens to the front of the machine room (15), abuts on the arrangement surface of the electrical box (14) A device provided with a refrigeration mechanism, characterized in that a shielding member (44) surrounding the various operation sections (34, 35) is provided. The apparatus having a refrigeration mechanism according to claim 1, wherein the shielding member (44) is formed of an elastic member. The front panel (37) has a support portion (39) inserted into the machine room (15) from the opening (36) on the lower rear surface of the front plate (38) set to a size capable of covering the opening (36). ) And a through hole (39a) that is loosely fitted into a protrusion (23a) protruding from the inner bottom surface of the machine chamber (15) is formed in the support portion (39), and the through hole (39a The apparatus having the refrigeration mechanism according to claim 1 or 2, wherein the upper part of the front plate (38) is screwed to the main body (11) in a state in which the protrusion (23a) is loosely fitted. The protruding height of the protrusion (23a) is such that the through hole (39a) is engaged with the protrusion (23a) with the front panel (37) being unscrewed from the upper portion, and the front panel (37) is The apparatus provided with the refrigeration mechanism according to claim 3, wherein the apparatus is set to a size that can be held obliquely. The protrusion is a head (23a) of a bolt (23) for fixing a column (21) defining the machine room (15) to a base plate (22) on which the refrigeration mechanism (13) is installed. The apparatus provided with the refrigeration mechanism according to claim 3 or 4.

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