JP2013204962A - Showcase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a showcase that can achieve energy saving by reducing an air volume when a night cover of the showcase is closed.SOLUTION: When an opening 2 for taking in and out a product of a showcase 50 is closed with a night cover 11, a volume of cold air blown from a side of a partitioning plate 3, which is a back face wall plate arranged in a product storage 4 for partitioning thereof, is reduced to a volume of air coming only from a ceiling blowing hole 55a while the night cover 11 is open.

Description

  The present invention relates to a showcase capable of displaying and storing refrigerated / frozen products by circulating cold air.

  As is well known, for example, as shown in FIG. 5, among the showcases, as shown in FIG. 5, for example, as shown in FIG. (Partition plate) 3 is divided into a product storage 4 and a cold air circulation duct 5, a cooler 9 is provided in the cold air circulation duct 5, and the lower end of the cold air circulation duct 5 is connected to the air inlet 6 and the upper end Is formed in the cold air outlet 7, and the cold air curtain is formed in the opening 2 by the cold air blown out from the air outlet 7 to cool the inside of the product storage 4 and prevent the outside air from entering the interior.

  The lower part of the showcase main body 1 is a machine room 8, which is not shown in the figure. Here, a condenser and a compressor connected to the cooler 9 to form a refrigeration cycle, and a machine that mainly cools the condenser and cools the machine. A condenser fan is installed to cool the equipment in the room.

  Then, when the store is closed at night or the like, the night cover 11 wound up and stored in the upper part of the opening 2 is pulled down to prevent the outside air from entering the interior. In the figure, reference numeral 12 denotes an illuminating lamp such as a fluorescent lamp that illuminates the inside of the cabinet attached to the lower surface of the display shelf 13 of the merchandise installed in the merchandise storage cabinet 4, and the illuminating lamp 12 is turned off at night.

The showcase described in the following Patent Document 1 has a blowout hole for blowing cool air in the duct formed in the inner wall surface plate (partition plate) 3, and the blowout hole is formed in the receding portion of the partition plate 3 in this way. Therefore, the cool air in the duct is blown out at the lower part of the product storage unit. As a result, the product stored in the lower part of the product storage unit that is likely to be insufficiently cooled can be reliably cooled.
Japanese Patent No. 4157637

  In the showcase of the said patent document 1, the correlation with the night cover 11 and the internal blowing from the blowing hole of the wall surface board (partition plate) 3 in the warehouse was not considered at all.

  If the night cover 11 is in the closed state at night or the like, it is possible to store only by blowing out the ceiling part without carrying out the blowing from both the ceiling and the inner wall surface plate (partition plate) 3 which is the rear wall in the warehouse. Although it is possible to perform cooling at a target temperature while keeping the inside temperature uniform, useless operation is performed.

  The object of the present invention is to eliminate the inconvenience of the conventional example, so that the air volume when the night cover is closed can be reduced only to the air volume from the ceiling blowing portion when the night cover is open, and the night cover is opened. Therefore, it is necessary to provide a showcase that can save energy by approximately halving the air volume of the cooling air because the air volume from the partition plate, which is the back wall of the interior, is not necessary.

  In order to achieve the above-mentioned object, the present invention according to claim 1 is a product storage container having an opening for putting in and out a product and having a product display shelf inside the showcase body formed of a heat insulating wall, The outer cold air circulation duct is partitioned by an inner wall plate, a cooler is disposed in the cold air circulation duct, the lower end of the cold air circulation duct is formed as an air inlet, and the upper end is formed as a cold air outlet, A cold air curtain is formed in the opening by the cold air blown out from the outlet, and the opening for putting in / out the product is closed, the inside of the product storage box is cooled, and a blowout hole for blowing out the cold air in the cold air circulation duct is provided on the inner wall surface plate. In a showcase where a part of the cool air that is formed and exits from the back of the product storage cabinet toward the display shelf, if the product outlet is closed with a night cover, the blowout of cool air from the back of the product storage must be reduced. The It is an effect.

  According to the first aspect of the present invention, when the night cover is closed, the blowout from the back wall of the inside of the cabinet can be narrowed so that the blowout from the ceiling occupies almost the whole. In addition, by making the air volume of the ceiling blowout the same as when the night cover is opened, the amount of air from the rear wall of the interior when the openable night cover is opened becomes unnecessary, and there is an energy saving effect.

  The gist of the present invention described in claim 2 is that the detection that the night cover is closed is performed by a magnet in the hook portion of the night cover and a proximity sensor provided in the vicinity of the hook holding portion.

  According to the second aspect of the present invention, it is possible to detect that the night cover is closed by a magnet and a proximity sensor (for example, a Hall IC or a reed switch), and detect that the night cover is closed by a temperature sensor. It can be detected with higher accuracy than

  The gist of the present invention described in claim 3 is that the means for reducing the blowout of the cold air from the rear surface of the product storage box performs opening / closing adjustment of the blowout hole with the adjusting plate.

  According to the third aspect of the present invention, the blowout of the cold air can be reduced mechanically and reliably from the partition plate by performing opening / closing adjustment of the blowout hole with the adjustment plate.

  The gist of the present invention described in claim 4 is that when the blowout of the cold air from the back of the product storage is reduced, the rotational speed of the fan motor for circulating cold air is reduced.

  According to the fourth aspect of the present invention, when the blowout from the rear wall of the interior is restricted by the air path adjustment plate so that the blowout from the ceiling occupies almost all the time, the night cover is opened. The amount of air from the rear wall of the inside of the cabinet becomes unnecessary, but by reducing the number of rotations of the fan motor for circulating cold air, this need can be reliably reduced and a power saving effect can be obtained.

  As described above, the showcase of the present invention has a showcase main body formed of a heat insulating wall, a merchandise storage box having a merchandise display shelf having an opening for putting in and out the merchandise, and a cold air circulation outside thereof. A cooler is installed in the cool air circulation duct, and the cool air circulation duct is formed with a lower end at the air inlet and an upper end at the cool air outlet, and blows out from the outlet. A cold air curtain is formed in the opening with cold air to close the opening for putting in and out the product, the inside of the product storage box is cooled, and a blowout hole for blowing out the cold air in the cold air circulation duct is formed in the inner wall surface plate to cool the air. In a showcase with a structure that partly protrudes from the back of the product storage in the direction of the display shelf, the air volume when the night cover is closed can be reduced to just the air volume from the ceiling blowing part when it is open. The Since the wind amount from the partition plate is a refrigerator in the rear wall plate when night cover is open there is no need, in which it is possible to achieve energy saving in that to half the approximate flow rate of the cooling air.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal side view showing an embodiment of a showcase of the present invention. The showcase shown in the drawing is configured by connecting at least a compressor, a radiator, a throttle device, and an evaporator with piping to form a refrigerant circuit, An integrated refrigerator built-in showcase installed in, using a fluid in a supercritical state on the high pressure side of the refrigerant circuit as a refrigerant, performing a cooling operation using heat absorption in the evaporator, Through a partition plate having a damper capable of opening and closing a heating air generation space having the radiator and a cooling air generation space having the evaporator while performing heating operation using heat radiation in the radiator The at least two or more case shelf spaces can be operated with full heating, total cooling, and combined heating and cooling by opening and closing the damper.

  The showcase 50 stores the interior of the showcase body formed of a heat insulating wall in a product storage 4 having an opening 2 for putting in and out the product and having a display shelf for the product, and a cold air circulation duct 5 on the outside thereof. Although partitioned by the inner wall surface plate 3, the product storage 4 is partitioned into an upper shelf portion 57a and a lower shelf portion 57b composed of two shelves, and each of the machine room 58, the rear upper space 59a, and the rear lower space 59b is provided outside thereof. A space is formed.

  The upper shelf 57a and the lower shelf 57b are partitioned by a partition plate 52a, and the space on the suction side to the evaporator 34 provided on the rear rear surface of the lower shelf 57b above the machine chamber 58 and the space of the lower shelf 57b It is partitioned off by a partition plate 52b.

  In addition, a rear upper space 59a in the space in which the radiator 32 is provided to generate the heated air and a lower lower space 59b in the space in which the cooler (evaporator) 34 is provided to generate the cooling air are separated from the partition plate 53. It is partitioned by dampers 62 and 63, and by opening and closing these dampers 62 and 63, the back upper space 59a and the back lower space 59b can communicate with each other.

  Furthermore, the suction space and the blowout space of the radiator 32 provided on the rear rear surface of the upper shelf 57a above the cooler (evaporator) 34 are separated from the suction space and the blowout space of the cooler (evaporator) 34 by the partition plate 54a. The space is partitioned by a partition plate 54b.

  The compressor 31 is housed in a machine room 58 located at the lowermost end in the showcase 50, and the radiator 32 and the radiator fan 21 are placed in the rear upper space 59a, the expansion device 33 and the cooler (evaporator) 34. In the rear lower space 59b, the evaporator blower 22 is supplied to the cooler (evaporator) 34 so that the cooling air from the upper shelf 57a and the lower shelf 57b space flows into the cooler (evaporator) 34. They are arranged in the suction portions (located between the lower shelf 57b and the machine room 58).

  Further, dampers 60 and 61 are provided at the outlet portion of the radiator 32, and dampers 64 and 65 are provided at the outlet portion of the cooler (evaporator) 34. 32 and the discharge direction of the air blown from the evaporator 34 can be determined. The white arrows in the figure indicate the flow of cooling air, and the hatched arrows indicate the flow of heating air.

  Here, the cooler (evaporator) 34 through which the cooling air passes has 10 or more rows in the air flow direction, and further includes one path in which the refrigerant flow channel faces the air flow.

  Further, the radiator 32 through which the heating air passes has five or more rows in the air flow direction, and further, the refrigerant flow path is configured by one path facing the air flow.

  In addition, an air blowing hole 55a at the time of cooling operation is provided on the back surface of the upper shelf portion 57a, and an air blowing hole 51a at the time of heating operation is provided on the bottom surface, both of which are constituted by a multi-hole plate having a honeycomb structure. ing.

  Similarly, the lower shelf 57b is provided with an air blowing hole 55b during the cooling operation on the back surface and an air blowing hole 51b during the heating operation on the bottom surface. As shown in FIG. 2, the air blowing hole 55 b is formed as a blowing hole formed in the inner wall surface plate 3 that divides the commodity storage 4 having a commodity display shelf and the cold air circulation duct 5 outside thereof. .

  A suction port 66 for heating operation is provided at the upper part of the upper shelf 57a, and an exhaust port 67 to the outside is provided at the bottom of the back surface of the lower back space 59b.

  Heater 70, which is a heating means for auxiliary heating operation, is provided in portions where heated air is blown between the air blowing holes 51a and the partition plate 52a and between the air blowing holes 51b and the partition plate 52b during the heating operation. 71 is provided.

  The driving operation will be described. There are three operation modes: full heating operation, full cooling operation, and combined heating / cooling operation. First, in the full heating operation, both the upper shelf portion 57a and the lower shelf portion 57b are heated. In this case, the damper 60 is closed (solid line), 61 is open (dashed line), 62 is closed (solid line), 63 is open (dashed line), 64 is open (dashed line), and 65 is closed (solid line). At this time, the refrigerant discharged from the compressor 31 dissipates heat in the radiator 32 and the temperature of the refrigerant itself decreases, the pressure is reduced by the expansion device 33, evaporates in the cooler (evaporator) 34, and returns to the compressor 31 again. This establishes the refrigeration cycle.

  The air sucked from the suction port 66 by the radiator blower 21 is radiated from the refrigerant by the radiator 32, and its temperature rises and is discharged from the opening of the damper 61. The discharged high-temperature air passes between the air blowing hole 51a and the partition plate 52a and between the air blowing hole 51b and the partition plate 52b, and the product temperature arranged on each shelf by the heaters 70 and 71 has a predetermined value. (For example, 50 degreeC) is further auxiliary-heated and blown out from blowouts 51a and 51b at the bottom of the upper shelf 57a and the lower shelf 57b.

  On the other hand, the air sucked by the evaporator blower 22 is deprived of heat from the refrigerant by the evaporator 34, and the temperature of the air itself is lowered and is discharged from the opening of the damper 64. Since the discharged low-temperature air is unnecessary in the full heating operation, it is discharged into the room through the exhaust port 67 at the bottom of the back surface of the back lower space 59b.

  Next, in the heating / cooling combined operation, the upper shelf 57a is a heating operation, and the lower shelf 57b is a cooling operation. In this case, the dampers 60 and 61 are both open (dashed line), 62 and 63 are both closed (solid line), and 64 and 65 are both open (dashed line). At this time, the flow of the refrigerant is the same as in the full heating operation.

  The air sucked from the suction port 66 by the radiator blower 21 is radiated from the refrigerant by the radiator 32, and its temperature rises and is discharged from the openings of the dampers 60 and 61. The discharged high-temperature air passes between the air blowing holes 51a and the partition plate 52a, and further heated so that the product temperature placed on the upper shelf 57a by the heater 70 becomes a predetermined value (for example, 50 ° C.). And blown out from the air blowing hole 51a.

  On the other hand, the air sucked by the evaporator blower 22 is deprived of heat from the refrigerant by the evaporator 34, and the temperature of the air itself is lowered and is discharged from the openings of the dampers 64 and 65. The discharged low-temperature air is blown out from the air blowing hole 55b to the lower shelf 57b so that the product temperature arranged on the lower shelf 57b becomes a predetermined value (for example, 9 ° C.), and the lower shelf 57b is cooled. Driving is performed.

  In the total cooling operation, both the upper shelf portion 57a and the lower shelf portion 57b are cooled. In this case, the damper 60 is open (dashed line), 61 is closed (solid line), 62 is open (dashed line), 63 is open (dashed line), 64 is closed (solid line), and 65 is open (dashed line). At this time, the flow of the refrigerant is the same as in the full heating operation.

  The air sucked from the suction port 66 by the radiator blower 21 receives heat radiated from the refrigerant by the radiator 32, and its temperature rises and is discharged from the opening of the damper 60. Since the discharged high-temperature air is unnecessary in the total cooling operation, it is discharged into the room through the exhaust port 67 at the bottom of the back surface of the back lower space 59b.

  On the other hand, the air sucked by the evaporator blower 22 is deprived of heat from the refrigerant by the evaporator 34, and the temperature of the air itself is lowered and is discharged from the opening of the damper 65.

  The discharged low temperature air is blown out from the air blowing holes 55a and 55b so that the product temperature arranged on the upper shelf 57a and the lower shelf 57b becomes a predetermined value (for example, 9 ° C.), and the cooling operation is performed. Done.

  By the way, in the present invention, the adjustment plate 24 is attached to the air blowing hole 55b, and the adjustment plate 24 performs opening / closing adjustment. As shown in FIG. 2, the adjustment plate 24 is an opening / closing plate pivotally supported at one end, and is connected to a driving device such as a stepping motor 25.

  The showcase 50 is provided with a night cover 11 wound up and stored at the top to close the opening 2 and prevent outside air from entering the cabinet when the store is closed at night or the like. The proximity sensor 28 provided in the vicinity of the magnet 26 of the hook portion 11a of the cover 11 and the hook holding portion 27 of the hook portion 11a provided on the main body side of the showcase 50 is used.

  As the proximity sensor 28, a Hall IC, a reed switch, or the like can be used. When the magnet 26 is close, the proximity sensor 28 is turned on, and when the magnet 26 is separated, the opening / closing of the night cover 11 is detected.

  FIG. 4 shows the control flow of the present invention. The air sucked by the evaporator blower 22 in the total cooling operation is deprived of heat from the refrigerant by the cooler (evaporator) 34, and the temperature itself decreases. The liquid is discharged from the opening of the damper 65.

  The discharged low temperature air is blown out from the air blowing holes 55a and 55b so that the product temperature arranged on the upper shelf 57a and the lower shelf 57b becomes a predetermined value (for example, 9 ° C.), and the cooling operation is performed. However, when the proximity sensor 28 detects that the night cover 11 is closed, the stepping motor 25 operates to move the adjusting plate 24 from the position a to the position b as shown in FIG. 55b is closed.

  As a result, the amount of cool air blown from the ceiling through the air blowing hole 55a is maximized, and the value of the back wall in the cabinet from the air blowing hole 55b becomes zero.

  When the blowout of cool air from the back of the product storage through the air blowing hole 55b is reduced in this way, the rotational speed of the cool air circulation fan motor of the evaporator blower 22 is reduced.

It is a vertical side view which shows one Embodiment of the showcase of this invention. It is explanatory drawing of a means to reduce the blowing of the cold air from the back of goods storage. It is explanatory drawing of the means to detect opening / closing of a night cover. It is a flowchart which shows the control flow of this invention. It is a vertical side view of a freezer-refrigerated open showcase.

DESCRIPTION OF SYMBOLS 1 Showcase body 2 Opening 3 Inner wall surface board (partition plate) 4 Goods storage 5 Cold air circulation duct 6 Suction inlet 7 Outlet 8 Machine room 9 Cooler 10 Temperature controller 11 Night cover 11a Hook part 12 Illumination lamp 13 Display shelf DESCRIPTION OF SYMBOLS 21 Blower for radiator 22 Blower for evaporator 24 Adjustment plate 25 Stepping motor 26 Magnet 27 Hook holding part 28 Proximity sensor 31 Compressor 32 Radiator 33 Throttle device 34 Cooler (evaporator)
50 Showcases 51a, 51b, 55a, 55b Air outlet holes 52a, 52b, 53, 54a, 54b Partition plate 57a Upper shelf 57b Lower shelf 58 Machine room 59 Rear space 59a Rear upper space 59b Rear lower space 60-65 Damper 66 Suction port 67 Exhaust port 68 Damper 70, 71 Heater

Claims (4)

The inside of the showcase body formed by the heat insulating wall is partitioned by a wall plate in the cabinet into a product storage having an opening for putting in and out of the product and having a display shelf for the product, and a cold air circulation duct on the outside thereof. A cooler is installed in the circulation duct, the lower end of the cold air circulation duct is formed at the air inlet, the upper end is formed at the cold air outlet, and the cold air blown from the outlet forms a cold air curtain at the opening. The opening for taking in and out is closed, the interior of the product storage is cooled, and a blowout hole for blowing out the cool air in the cool air circulation duct is formed on the inner wall surface plate, and a part of the cool air is directed to the display shelf from the back of the product storage In the showcase of the structure that appears in
A showcase characterized by reducing the blowing of cool air from the back of the product storage when the product door is closed with a night cover.   The showcase according to claim 1, wherein the detection of closing by the night cover is performed by a magnet of a hook portion of the night cover and a proximity sensor provided in the vicinity of the hook holding portion.   The showcase according to claim 1, wherein the means for reducing the blowing of cool air from the back of the product storage is to adjust the opening and closing of the blowout hole with an adjustment plate.   The showcase according to claim 1 or 2, wherein when the blowout of cool air from the back of the product storage is reduced, the number of rotations of the cool air circulation fan motor is reduced.

Images