Closed refrigeration display cabinet

Abstract

The cold air is blown upwards through the blow-out opening, so that the cold air cannot directly reach the upper side sometimes. In addition, if the glass plates are four-side glass plates, the heat insulation effect is limited. Cold air is supplied to an air flow pipe (25) in the display chamber (21) through driving of the micro-blower (15). Then, the air is blown out from the blow-out hole (27) with a momentum. The blow-out hole (27) is also disposed near the top surface portion (21c) in the display chamber (21). Furthermore, the blow-out holes (27) do not face the center, when one air flow pipe (25) is focused on, the blow-out holes (27) of the blow-out hole row (29X) face the direction close to the plate surface of the glass plate (21d (1)) and the blow-out holes (27) of the blow-out hole row (29Y) face the direction close to the plate surface of the glass plate (21d (2)), and cold air is blown out by two adjacent air flow pipes (25, 25) so as to traverse the plate surface of one glass plate (21d). As a result, even cooling can be achieved without omission at the portion where the article is displayed. In addition, the airflow tube (25) does not impair visibility.

Description

Technical Field

[0001] The present invention relates to a closed refrigerated display case having a display room that cools food and other items and displays them in a manner that can be visually recognized from the outside. Background Technology

[0002] In traditional enclosed refrigerated display cases, the display room has windows made of transparent panels such as glass, which can be seen from the outside. The machine room and cooling room are located on the lower side of the display room.

[0003] Furthermore, the display room is cooled by a compression refrigeration cycle to keep the items in a refrigerated state. The compressor, condenser, and expansion valve, which are essential components of the compression refrigeration cycle, are housed in the machine room, and the cooler (= evaporator) is housed in the cooling room. The cold air generated by the cooler cooling the air is blown into the display room through the outlet located between the display room and the cooler. Then, the air in the display room returns to the cooling room through the inlet.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2017-124237 Summary of the Invention

[0007] The problem the invention aims to solve

[0008] Recently, showrooms have become larger and taller, and to maximize visual recognition, showrooms with four transparent glass panels on all sides have been adopted.

[0009] In this type, because the cold air is blown upwards through the vents, it sometimes cannot reach the upper part directly, even inside the showroom. Furthermore, even with an insulating film applied to the glass surface, the insulating effect has its limits if visibility is prioritized and all four sides are made of glass.

[0010] On the other hand, if the force of the cold air is increased so that the cold air reaches the upper part of the display room directly, the lower part will be overcooled because it is a closed system.

[0011] This invention addresses the aforementioned problems and aims to provide a novel and useful enclosed refrigerated display case that can cool the display room thoroughly and as evenly as possible without compromising external visibility.

[0012] Solution for solving the problem

[0013] This invention addresses the aforementioned problems of conventional refrigerated display cases by providing a closed refrigerated display case. It comprises a cooling unit and a display chamber with a transparent window above the cooling unit. Air cooled by the cooling unit is blown into the display chamber, and air heated in the display chamber returns to the cooling unit for further cooling. Thus, the air circulates between the cooling unit side and the display chamber side while simultaneously cooling the display chamber. The display chamber is characterized by side panels and multiple support columns located at various corners. The side panels are primarily composed of transparent panels that act as windows enclosing the support columns to maintain a refrigerated state. Airflow pipes are installed on each support column in an upright position, or the support columns themselves function as airflow pipes. At least a portion of each airflow pipe enters the interior of the display chamber, while the side of each airflow pipe is exposed inside the display chamber.

[0014] Each airflow pipe has an air outlet array formed on its exposed side inside the showroom. The air outlet array consists of a plurality of air outlets spaced apart in the vertical direction. The plurality of air outlets of the air outlet array of one airflow pipe, separated by one side portion, face a direction that is nearly parallel to the inner surface of the side portion. The plurality of air outlets of the air outlet array of another airflow pipe face a direction that is nearly parallel to the inner surface of another side portion, which is located on the opposite side portion, separated by another airflow pipe. Cooled air is blown into the showroom from the air outlets.

[0015] Preferably, in an airflow pipe, two rows of blowholes are arranged circumferentially offset, with the blowholes of one row facing a direction nearly parallel to the plate surface of one inner side of the airflow pipe, and the blowholes of the other row facing a direction nearly parallel to the plate surface of the other inner side of the airflow pipe.

[0016] Preferably, the vertical positions of the blowholes in one of the two rows of blowholes are different from each other.

[0017] Preferably, the blow-out holes are configured to also serve as holes for setting up the space frame.

[0018] Preferably, the cooling unit is divided into a cooling chamber and a mechanical chamber, with the cooler constituting the vapor compression refrigeration cycle housed in the cooling chamber. The air cooled in the cooling chamber is pressurized and delivered to multiple airflow pipes via a miniature blower and branch pipes.

[0019] Preferably, the airflow duct, which also serves as a support column, is longitudinally divided into a side facing the interior of the display room and a side facing the exterior of the display room. Cooled air is blown into the display room from the part formed on the side facing the interior of the display room. On the other hand, the anti-fog function of the transparent panel can also be achieved by blowing air out from a plurality of airflow holes that are also spaced apart vertically on the side facing the exterior of the display room.

[0020] Preferably, a guide tube for generating directional airflow is provided on the edge of the blow-out hole on the side facing the display room, and the air blown out from the guide tube is guided in a swirling direction.

[0021] Preferably, the cooling unit is divided into a cooling chamber and a mechanical chamber. The cooler that constitutes the vapor compression refrigeration cycle is housed in the cooling chamber. The air cooled in the cooling chamber is pressurized and delivered to multiple airflow pipes through a micro blower and branch pipes. The condenser that constitutes the vapor compression refrigeration cycle is housed in the mechanical chamber. The air heated by the condenser is pressurized and delivered to multiple airflow pipes through a micro blower and branch pipes.

[0022] Invention Effects

[0023] In the enclosed refrigerated display case of the present invention, the height-adjusted display chamber can be cooled as evenly as possible without compromising external visibility. Furthermore, it can also be equipped with an anti-fogging mechanism. Attached Figure Description

[0024] Figure 1 This is a perspective view of the enclosed refrigerated display case according to the first embodiment of the present invention.

[0025] Figure 2 yes Figure 1 The front view of the enclosed refrigerated display case.

[0026] Figure 3 yes Figure 1 Side view of a closed refrigerated display case.

[0027] Figure 4 yes Figure 1 An extraction diagram of the cooling mechanism of a closed refrigerated display case.

[0028] Figure 5 yes Figure 1 A three-dimensional view of the airflow tube.

[0029] Figure 6 yes Figure 5 A cross-sectional view of the airflow pipe.

[0030] Figure 7 yes Figure 1A cross-sectional view of a closed refrigerated display case.

[0031] Figure 8 This is an instruction on how to use. Figure 5 A diagram illustrating the installation method of the space frame when the airflow pipe's outlet hole is used as a support hole for the space frame.

[0032] Figure 9 This is an extracted diagram of the cooling mechanism and anti-fog mechanism of the enclosed refrigerated display case according to the second embodiment of the present invention.

[0033] Figure 10 yes Figure 9 A cross-sectional view of a closed refrigerated display case.

[0034] Figure 11 This is a perspective view of the enclosed refrigerated display case according to the third embodiment of the present invention.

[0035] Figure 12 yes Figure 11 Extraction diagram of the cooling and anti-fogging mechanisms of a closed refrigerated display case.

[0036] Figure 13 yes Figure 11 A cross-sectional view of a closed refrigerated display case.

[0037] Figure 14 yes Figure 13 A magnified view of a portion of the image.

[0038] Figure 15 yes Figure 11 A three-dimensional view of the support columns of a closed refrigerated display case.

[0039] Figure 16 yes Figure 15 AA section view of the support column.

[0040] Figure 17 yes Figure 11 A cross-sectional view of another example of the glass door of a closed refrigerated display case. Detailed Implementation

[0041] The closed refrigerated display case 1 according to the first embodiment of the present invention will be described with reference to the accompanying drawings.

[0042] like Figures 1-3 As shown, the enclosed refrigerated display case 1 has a shell 3. The shell 3 is generally a long, rectangular box. Casters 3a are installed at the four corners of the lower surface, allowing it to move.

[0043] In the following description, the top, bottom, front, back, left, and right directions of the enclosed refrigerated display case 1 are... Figure 1 Based on.

[0044] like Figures 1-4 As shown, a cooling unit storage chamber is arranged in the lower part 5 of the housing 3. The lower part is called the mechanical chamber 7, and the upper part is called the cooling chamber 9, which are separated by thermal insulation.

[0045] In the cooling unit, the various components are connected in the order of compressor, condenser 11, expansion valve, and evaporator 13 in a closed-loop refrigerant piping system, forming a refrigerant circuit. Furthermore, refrigerant is sealed within the refrigerant piping.

[0046] The compressor, condenser 11, and expansion valve are housed in the machine compartment 7, and the evaporator 13 is housed in the cooling compartment 9. The refrigerant piping runs through the partition between the machine compartment 7 and the cooling compartment 9.

[0047] The vapor compression refrigeration cycle is achieved by circulating the refrigerant in a refrigerant circuit as described above in the order of compressor → condenser 11 → expansion valve → evaporator 13 → compressor.

[0048] Evaporator 13 exchanges heat between the refrigerant, which has been depressurized by the expansion valve, and the surrounding air, causing the refrigerant to absorb heat and evaporate. At this time, the air that has exchanged heat with the refrigerant is cooled. In this embodiment, evaporator 13 operates as a cooler, hereinafter referred to as "evaporator (=cooler) 13". Evaporator (=cooler) 13 comes in various types, but a compact and easy-to-maintain plate shape is recommended. The condenser 11 is similar.

[0049] In normal use, the evaporator fan delivers the surrounding air cooled by the evaporator (= cooler) 13 and introduces fresh air into the vicinity of the evaporator (= cooler) 13, thereby promoting heat exchange in the evaporator (= cooler) 13.

[0050] However, in this embodiment, a miniature blower 15 is used instead of an evaporator fan.

[0051] The miniature blower 15 is piezoelectric, and the diaphragm is bent and vibrated by the drive of the piezoelectric element, thereby expelling air. Since the piezoelectric element is attached to the diaphragm to form the drive body, it can be made thin and can achieve a large flow rate with low power consumption. The miniature blower 15 is fixed in a suspended manner relative to the top surface of the cooling chamber 9, and adjusted so that the inlet 15a is at the bottom and the outlet 15b is at the side.

[0052] Because the lower end of the intake 15a is open, air can be drawn into the cooling chamber 9.

[0053] The outlet 15b is connected to the four-way branch pipe 19 via a connector 17. The four-way branch pipe 19 is composed of a combination of cylindrical pipes, with one end of each branch pipe 19b, 19b, 19b, 19b connected to the lower part of the central pipe 19a, which is axially oriented vertically, and thus integrated. Because the connector 17 is bent, the four-way branch pipe 19 can be installed in the above-described manner.

[0054] The branch pipes 19b, 19b, 19b, 19b extend radially in a roughly horizontal plane, and each of them has a connector 17 connected to its opening at the other end.

[0055] Inside the cooling chamber 9, the miniature blower 15 is fixed at a position slightly offset from the center, so that the central pipe 19a of the four-way branch pipe 19 is located in the center, and the branch pipes 19b, 19b, 19b, 19b extend radially along the diagonal lines of the four corners toward the inner side of the cooling chamber 9.

[0056] In the cooling chamber 9, a plate-type evaporator (=cooler) 13 is housed in a ground-mounted state, with ample space above it.

[0057] The four-way branch pipe 19 is housed in the above spare space and does not directly contact the evaporator (=cooler) 13.

[0058] The upper part of the shell 3 becomes the display room 21. The display room 21 is approximately three times the size of the lower part 5, and the height of the shell 3 also increases accordingly.

[0059] Showroom 21 is a room set up in supermarkets, convenience stores, etc., to display beverages, food and other items in a refrigerated manner, and is a closed room with a door that can be opened and closed.

[0060] For showroom 21, the top surface of the lower part 5 becomes the bottom surface 21a, and support columns 21b, 21b, 21b, 21b rise from the four corners of the bottom surface 21a. Moreover, the top surface 21c is supported by the upper ends of these support columns. These components are combined into one unit, forming a quadrilateral frame in the front, back, left, and right directions, consisting of the bottom surface 21a, the top surface 21c, and a pair of horizontally adjacent support columns 21b, 21b. However, transparent glass panels 21d are embedded in the frame on the left, right, and rear sides as windows.

[0061] The front side serves as an opening for taking out or placing items for display. The front side is closed by a glass door 21e formed by a glass panel 21d embedded in a frame. This glass door 21e opens and closes by rotating around a pivot located on the side of a support column 21b. Furthermore, the glass panel 21d embedded in the frame of the glass door 21e is slightly smaller than the glass panel 21d directly embedded in the support columns 21b, 21b, but since it is made of the same material, it is labeled with the same reference numerals.

[0062] The support columns 21b, 21b on the front side are recessed rearward by an amount corresponding to the thickness of the glass door 21e. When the glass door 21e is closed, this recess allows the glass door 21e to fit into the gap between the bottom surface 21a and the top surface 21c. Therefore, when the showroom 21 is closed by the glass door 21e, the showroom 21 is sealed in a way that maintains a refrigerated state. In addition, the showroom 21, including the bottom surface 21a, forms a heat-insulating structure.

[0063] Showroom 21 is constructed as described above, and is a four-sided glass refrigerated type that allows the interior to be visually recognized from the outside from any direction.

[0064] The bottom surface 21a is provided with vents 23, 23, 23, 23 that connect the cooling chamber 9 and the display chamber 21. The vents 23, 23, 23, 23 are located in the middle of the four edges of the bottom surface 21a.

[0065] Additionally, airflow pipes 25 are installed on the support columns 21b, 21b, 21b, 21b, which rise from the four corners of the bottom surface 21a along the inner side of the display chamber 21. Each airflow pipe 25 is a slender cylindrical shape, rising parallel to the support column 21b (i.e., along the inner side of the display chamber 21) with its axial direction running vertically. The upper end of the airflow pipe 25 is closed. Furthermore, multiple circular blowholes 27 are provided on the circumferential surface (i.e., the side surface).

[0066] like Figure 5 , Figure 6 As shown, blowholes 27, 27, ... are arranged at intervals in the axial direction (vertical direction) to form a blowhole row 29X. Additionally, another blowhole row 29Y is formed at intervals in the circumferential direction, with blowholes 27, 27, ... also spaced at intervals in the axial direction. The vertical spacing of adjacent blowholes 27, 27 in both blowhole rows 29X and 29Y is the same, but they differ in the circumferential direction. The blowhole 27 of blowhole row 29Y is located approximately in the middle between the vertically adjacent blowholes 27, 27 of blowhole row 29X.

[0067] In addition, such as Figure 7 As shown, the blow-out hole rows 29X and 29Y are separated in the circumferential direction by α (inter-row angle) = 70 degrees to 90 degrees.

[0068] Reference numeral 31 indicates a support frame, which is constructed from slender angle members with an L-shaped cross-section. In the support frame 31, the thicker side of one face 31a is welded integrally to the outer periphery of the airflow pipe 25, and the other face 31b is also integrally fixed to the support column 21b. Thus, with the aid of the support frame 31, the airflow pipe 25 stands parallel to the support column 21b, occupying the four corners of the display room 21. The upper end of the airflow pipe 25 reaches near the inner surface of the top surface 21c of the display room 21.

[0069] One side 31a of the bracket 31 is fixed at a position relative to the airflow tube 25, opposite to the rows of blow-out holes 29X, 29Y.

[0070] The bracket 31 is fixed relative to the support column 21b, and the airflow pipe 25 is located at the corner of the extension lines of the two orthogonal glass plates 21d, 21d. Furthermore, the airflow hole rows 29X and 29Y are separated by an inter-row angle α and are located near the inner surfaces of the glass plates 21d, 21d, respectively. The four airflow pipes 25 are positioned as described above.

[0071] Circular through holes are formed at the four corners of the bottom surface 21a. Connectors 17, 17, 17, 17, which connect to branch pipes 19b, 19b, 19b, 19b respectively, are inserted into these through holes, with their other ends protruding into the display chamber 21. Connectors 17 are bent, with their other ends facing upwards. The lower openings of airflow pipes 25, 25, 25, 25 are connected to the other protruding ends of each pipe, forming a supply path for cold air.

[0072] A wire rack 33 is provided in showroom 21 for holding and displaying items. For example... Figure 8 As shown, the mesh frame 33 has a rod-shaped insert 33b near a corner of one edge of the mesh plate 33a, which serves as the mounting surface, and a hook 33c is provided at the edge opposite to the insert 33b across the mesh plate 33a. The insert 33b and the hook 33c are arranged as a group, with two sets of them near the two corners of their respective opposite edges.

[0073] The size of the blowout hole 27 is set so that not only the insert 33b can be inserted, but the insert 33b can also rotate in the vertical direction when inserted.

[0074] Additionally, reference numeral 35 in the attached drawing indicates a bracket. The bracket 35 has L-shaped locking claws 35a, 35a in cross-section that align with the blow holes 27, 27 arranged vertically, allowing the locking claws 35a, 35a to be inserted into and locked into the blow holes 27, 27. The bracket 35 also has U-shaped hook recesses 35b that protrude inwards.

[0075] Insert the insert pieces 33b, 33b into the respective blowout holes 27, 27 of the two airflow pipes 25, 25. After rotating the mesh plate 33a by lifting it, the hanging pieces 33c, 33c descend and hook onto the hanging recesses 35b, 35b from above, thereby setting up the mesh frame 33. Using the mesh plate 33a of this mesh frame 33, the showroom 21 is divided vertically, but sufficient ventilation is still possible through the mesh.

[0076] Multiple space frames 33 can be set.

[0077] In this way, the blowout hole 27 can also be used as an insertion hole for setting the mesh frame 33. Taking into account the relationship with the mesh frame 33, the hole size of the blowout hole 27 and the spacing between the holes are optimally designed.

[0078] The enclosed refrigerated display case 1 is configured as described above. When the display chamber 21 is closed and the start switch for operating the enclosed refrigerated display case 1 is turned on, a vapor compression refrigeration cycle is implemented, and the miniature blower 15 is driven. The cold air generated in the cooling chamber 9 is drawn in through the intake 15a of the miniature blower 15, pressurized and transported from the exhaust 15b to the four-way branch pipe 19, and supplied from these branch pipes 19b, 19b, 19b, 19b to the airflow pipes 25, 25, 25, 25 within the display chamber 21. Then, as... Figure 4 , Figure 7 The arrows indicate that the air is blown out with force from the blow holes 27, 27, ...

[0079] In addition, corresponding to the amount of cold air blown out, the air in showroom 21 was warmed up as follows: Figure 4 , Figure 7 As indicated by the arrows, the air returns from vents 23, 23, 23, 23 to the cooling chamber 9, where it becomes cold air, and is then blown out into the display chamber 21 again as described above. This forms an air circulation path.

[0080] The blow holes 27, 27, ... are also located near the top surface 21c inside the showroom 21.

[0081] Furthermore, the blowout 27 is not directed toward the center of the display room 21. If we focus on an airflow pipe 25, the blowout 27 of the blowout pipe row 29X is directed toward a direction that is nearly parallel to the surface of one glass plate 21d, and the blowout 27 of the blowout pipe row 29Y is directed toward a direction that is nearly parallel to the surface of another glass plate 21d. As a result, by using two adjacent airflow pipes 25, 25, cold air is blown out in a manner that crosses the surface of a glass plate 21d, and then directed toward the center of the display room 21 through natural convection. Therefore, strong cold air is not directly blown onto the displayed items.

[0082] Using the cooling mechanism described above, all parts of the displayed items in the showroom 21, whether on the lower or upper level, can be cooled as uniformly as possible without any omissions.

[0083] In addition, since the airflow ducts 25 are located at the four corners, the arrangement of the airflow ducts 25 will not impair visibility.

[0084] In the machine room 7, the condenser fan 12 delivers the surrounding air heated by the condenser 11 and introduces fresh air around the condenser 11, thereby promoting heat exchange in the condenser 11.

[0085] The flow of hot air is used to prevent fogging of the glass panel 21d of the showroom 21.

[0086] A vent 37 is provided on the side of the machine room 7, through which heated air in the machine room 7 is discharged upwards. Since the discharged hot air is directed upwards along the glass plate 21d, the outer surface of the glass plate 21d is heated to prevent condensation. Inside the display room 21, cool air is blown out from the airflow pipe 25 along the inner surface of the glass plate 21d. Therefore, the inner surface of the glass plate 21d cools down more easily than the storage space of the display room 21. However, as described above, the outer surface of the glass plate 21d is heated efficiently, thus achieving an anti-fog effect.

[0087] Next, the enclosed refrigerated display case 39 of the second embodiment is shown. (As...) Figure 9 As shown, in the machine room 7, instead of the condenser fan 12, a miniature blower 15 and a four-way branch pipe 19 are installed in the same manner as in the cooling chamber 9 via connectors 17. In addition, circular through holes are formed at the four corners of the machine room 7, and the other ends of the connectors 17, 17, 17, 17 that connect to the branch pipes 19b, 19b, 19b protrude outward through these through holes.

[0088] Airflow pipes 25 are also installed at the outer corners of the display room 21 with the aid of brackets 41. These airflow pipes 25 are erected parallel to the airflow pipes 25 inside the display room 21. The brackets 41 are Y-shaped, with opposite single sides 41a and 41a fixed to the support column 21b, and the airflow pipes 25 are fixed to the remaining protruding surface 41b.

[0089] The connector 17, which connects to the branch pipe 19b, is bent with its other end facing upwards. The lower openings of the airflow pipes 25, 25, 25, 25 are connected to the other protruding end of each of these protrusions.

[0090] To differentiate them, the airflow pipe 25 inside the display chamber 21 is designated as airflow pipe 25A, and the outer airflow pipe 25 is designated as airflow pipe 25B. Like airflow pipe 25A, airflow pipe 25B has its blowholes 27 in rows 29X and 29Y oriented in a direction nearly parallel to the surface of the glass plate 21d, efficiently heating the outer surface of the glass plate 21d over its entire surface. Therefore, as... Figure 10 As indicated by the arrow, hot air is blown out along the outer surface of the glass plate 21d and cold air is blown out along its inner surface to achieve thorough and uniform cooling within the showroom 21 in a fog-free state.

[0091] In addition, since the airflow duct 25B is located at the four corners, the placement of the airflow duct 25B will not impair visibility.

[0092] Using this anti-fog mechanism, the anti-fog effect is better than that of the type that discharges hot air from the vent 37 of the closed refrigerated display case 1 in the first embodiment.

[0093] Furthermore, the operation of the miniature blower 15 in the machine chamber 7 can be stopped from the outside of the enclosed refrigerated display case 39 using an operating part (not shown), allowing the miniature blower 15 to be stopped when anti-fogging is not required. An appropriate gap is formed on the bottom side of the machine chamber 7, allowing for natural ventilation and preventing the interior of the machine chamber 7 from overheating to the required level.

[0094] In addition, since both cold and hot air can be adjusted, the required cooling and anti-fogging effects can be obtained in combination with the conditions inside the showroom 21 and the external environment around the enclosed refrigerated display case 39.

[0095] Next, the enclosed refrigerated display case 51 of the third embodiment is shown. (As...) Figure 11 , Figure 12 As shown, the enclosed refrigerated display case 39 of the second embodiment is the same as the one in the second embodiment, and has both a cooling mechanism and an anti-fog mechanism.

[0096] However, the support column 53 of the showroom 21 also serves as an airflow duct for both cold and hot air. The support column 53 extends not only into the showroom 21 but also below it, becoming the support columns at the four corners of the shell 3.

[0097] In the second embodiment, the entire airflow pipe 25A enters the display room 21, but also serves as part of the support column 53 for the airflow pipe.

[0098] Furthermore, the same reference numerals are used for the same components as those in the enclosed refrigerated display cases 1 and 39 of the first and second embodiments, and descriptions are omitted.

[0099] Support column 53 is cylindrical, such as Figures 13-16As shown, its cross-section in the direction orthogonal to the length direction consists of a curved portion 53a of approximately a quarter circle and two flat portions 53b and 53c, which are divided into two partition chambers 55 and 57 in the longitudinal direction by a partition plate 53d. The partition plate 53d makes the two partition chambers 55 and 57 approximately equal, but partition chamber 55 includes a corner portion between the two flat portions 53b and 53c, and is correspondingly larger.

[0100] Between the flat portion 53b of one support column 53 and the flat portion 53c of the other support column 53, glass panels 21d are embedded on the left and right rear sides. In addition, the front side is closed by a glass door 21e with the glass panels 21d embedded in it.

[0101] The width dimensions of the planar portions 53b and 53c of the support column 53 are slightly larger than the thickness of the glass panel 21d and the glass door 21e, and correspondingly protrude outwards in the thickness direction of the glass panel 21d and the glass door 21e. Therefore, a portion of the support column 53 extends into the display room 21. Furthermore, the glass door 21e is rotatably supported by a support member 54, which is installed on the upper and lower ends of the support column 53, respectively.

[0102] The corner of the partition chamber 55 extends into the display chamber 21. At this corner, multiple blowholes 59, 59, ... are spaced apart vertically, thus making the partition chamber 55 face the display chamber. The blowholes 59 are formed in the same manner as the blowholes 27.

[0103] A shorter guide tube 61 stands upright from the edge of the blowout hole 59 and communicates with the partition chamber 55. The axial direction of the guide tube 61 lies down towards the side of the display chamber 21.

[0104] Therefore, the air, which is pressurized and delivered to the four corner compartments 55, 55, 55, 55 respectively, becomes a spiral airflow when it is blown out from each guide tube 61. Depending on the external environment, the parts that are easily heated are preferentially cooled without any omissions, so as a result, the displayed items are cooled as evenly as possible.

[0105] Depending on the type, size, and method of displaying the items, there may be situations where a spiral shape is better than blowing air towards the center of the display room 21. By adjusting the installation angle of the guide tube 61, the air blowing angle can be adjusted freely.

[0106] In the case where the airflow pipe 25 is separate from the display chamber 21 as in the first embodiment, the problem can be solved by adjusting the circumferential position of the blowout hole 27. However, in this embodiment, since the area where the blowout hole 59 can be formed is limited, the guide tube 61 is used together.

[0107] On the partition chamber 57 side, at the portion of the flat portion 53c protruding outside the display chamber 21, blow holes 63, 63, ... are formed at intervals in the vertical direction. These blow holes 63 are also formed in the same way as the blow holes 27. In addition, a guide tube 61 is also installed.

[0108] The flat portion 53c is orthogonal to the outer surfaces of the glass plate 21d and the glass door 21e. Furthermore, the axial direction of the guide tube 61 is parallel to the glass plate 21d. Therefore, the air that is pressurized and delivered to the four corner partition chambers 57, 57, 57, 57 respectively becomes an airflow that flows parallel to the outer surface when it is blown out from each blow-out hole 63.

[0109] Similar to the second embodiment, the partition chamber 55 is connected to the miniature blower 15 of the cooling chamber 9, and the partition chamber 57 is connected to the miniature blower 15 of the machine chamber 7, and is supplied with cold air and hot air respectively. Between adjacent support columns 53, hot air is blown out from the blowout holes 63, 63, ... of the flat portion 53c of one support column 53, but the airflow can be adjusted by using the miniature blower 15, so that it can reach another support column 53.

[0110] The same conditions as in the second embodiment are achieved, namely, cooling of the interior of the showroom 21 and anti-fogging of the transparent panel, but since the support column 53 also serves as an airflow duct, it has a simple appearance.

[0111] like Figure 17 As shown, the glass door 21e can be of the type that curves outward from the center, but in this case, instead of the support column 53, the front and rear corners of the left side of the showroom 21 are supported by the support column 65.

[0112] When the partition chambers 55 and 57 are arranged in a left-right orientation, the support column 65 is opposite to the support column 53.

[0113] The outer surface of the glass door 21e is curved, but by using the support column 65 together, hot air is blown from the left and right sides onto the outer surface of the glass door 21e of the showroom 21, so that the hot air flows into the entire surface of the outer surface of the glass door 21e.

[0114] As for the outer surface of the rear glass panel 21d, since hot air does not flow in, it cannot achieve an anti-fog effect, but this is not an obstacle if it is designed to be installed close to the wall.

[0115] The embodiments of the present invention have been described in detail above, but the specific structure is not limited to these embodiments. Design changes and other modifications that do not depart from the spirit of the present invention are also included in the invention.

[0116] For example, the display room of a closed refrigerated display case can also be a type that removes the three glass sides on the back. In addition, the display room does not have to be a quadrilateral, but a triangle or pentagon.

[0117] Furthermore, the shape, size, raw materials, and structure of each component are all included within the scope of this invention, as long as they can achieve the intended function of this invention. Even if they are combined in the form of a special product, a commercially available product, or a product to be proposed in the future, they are all included in the scope of this invention.

[0118] Alternatively, the airflow pipe can be embedded inside the support column to form a double-layered cylindrical shape, with the hole connecting the airflow pipe and the support column serving as the blow-out hole.

[0119] Alternatively, if the position of the blowhole can ensure the generation of airflow in the desired direction, a guide tube may not be necessary.

[0120] Explanation of reference numerals in the attached figures

[0121] 1. Enclosed refrigerated display case (first embodiment); 3. Shell; 3a. Casters; 5. Lower part; 7. Machinery room; 9. Cooling chamber; 11. Condenser; 12. Condenser fan; 13. Evaporator (=cooler); 15. Miniature blower; 15a. Inlet; 15b. Outlet; 17. Connector; 19. Four-way branch pipe; 19a. Central pipe; 19b. Branch pipe; 21. Display room; 21a. Bottom surface; 21b. Support column; 21c. Top surface; 21d. Glass plate; 21e. Glass door; 23. Ventilation opening; 25. Airflow pipe; 27. Outlet hole; 29X, 29Y. Outlet hole array; 31. Support Frame; 31a, 31b, single-sided; 33, mesh frame; 33a, mesh plate; 33b, insert piece; 33c, hanging piece; 35, bracket; 35a, locking claw; 35b, hanging recess; 37, ventilation hole; 39, enclosed refrigerated display case (second embodiment); 41, bracket; 41a, single-sided; 41b, raised surface; 51, enclosed refrigerated display case (third embodiment); 53, support column; 53a, curved surface; 53b, 53c, flat surface; 53d, partition plate; 54, support member; 55, 57, partition chamber; 59, blow-out hole; 61, guide tube; 63, blow-out hole; 65, support column; α, inter-row angle

Claims

1. A closed refrigerated display case comprising a cooling unit and a display chamber with a transparent window above the cooling unit, wherein air cooled by the cooling unit is blown into the display chamber, and air heated in the display chamber returns to the cooling unit for further cooling, thereby circulating the air between the cooling unit side and the display chamber side while simultaneously cooling the display chamber, characterized in that, The showroom consists of a side panel and multiple supporting columns, which are located at various corners. The side panel is primarily made of a transparent panel, which serves as a window to enclose the supporting columns and maintain a refrigerated state. Airflow pipes are installed on each of the supporting columns in an upright position, or the supporting columns are configured to function as airflow pipes. At least a portion of each airflow pipe enters the interior of the showroom, and the side of each airflow pipe is exposed inside the showroom. Each airflow pipe has an exposed side panel inside the showroom with a row of airflow holes, which is formed by multiple airflow holes spaced apart in the vertical direction. The plurality of blowholes in the airflow pipe of one side portion are oriented in a direction nearly parallel to the inner surface of that side portion, and the plurality of blowholes in the airflow pipe of another side portion are oriented in a direction nearly parallel to the inner surface of that other side portion, which is located on the opposite side portion across the other airflow pipe. Cooled air is blown into the display room from the blowout.

2. The enclosed refrigerated display case according to claim 1, characterized in that, In an airflow tube, two rows of blowholes are arranged circumferentially offset. The blowholes of one row face a direction that is nearly parallel to the plate surface of one inner side of the airflow tube, while the blowholes of the other row face a direction that is nearly parallel to the plate surface of the other inner side of the airflow tube.

3. The enclosed refrigerated display case according to claim 2, characterized in that, The positions of the blow holes in one of the two rows of blow holes are different from those in the vertical direction.

4. The enclosed refrigerated display case according to claim 2 or 3, characterized in that, The blowout holes are designed to also serve as holes for setting up the space frame.

5. The enclosed refrigerated display case according to claim 1, characterized in that, The cooling unit is divided into a cooling chamber and a mechanical chamber. The cooler that constitutes the vapor compression refrigeration cycle is housed in the cooling chamber. The air cooled in the cooling chamber is pressurized and delivered to multiple airflow pipes through a miniature blower and branch pipes.

6. The enclosed refrigerated display case according to claim 1, characterized in that, The airflow duct, which also serves as a support column, is longitudinally divided into a side facing the interior of the display room and a side facing the exterior of the display room. Cooled air is blown into the display room from the portion facing the interior of the display room, while on the other hand... By blowing air out from multiple air outlets spaced apart vertically on the side facing out of the display room, the transparent panel can also achieve an anti-fog function.

7. The enclosed refrigerated display case according to claim 6, characterized in that, A guide tube for generating directional airflow is provided on the edge of the blow-out hole on the side facing the showroom, and the air blown out from the guide tube is guided in a swirling direction.

8. The enclosed refrigerated display case according to claim 6 or 7, characterized in that, The cooling unit is divided into a cooling chamber and a mechanical chamber. The cooler that constitutes the vapor compression refrigeration cycle is housed in the cooling chamber. The air cooled in the cooling chamber is pressurized and delivered to multiple airflow pipes through a micro blower and branch pipes. The condenser that constitutes the vapor compression refrigeration cycle is housed in the mechanical chamber. The air heated by the condenser is pressurized and delivered to multiple airflow pipes through a micro blower and branch pipes.

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