CN113712399A

CN113712399A - Display cabinet

Info

Publication number: CN113712399A
Application number: CN202010833029.3A
Authority: CN
Inventors: 原宁之; 萩谷修太郎
Original assignee: Nakano Refrigerators Co Ltd
Current assignee: Nakano Refrigerators Co Ltd
Priority date: 2020-05-26
Filing date: 2020-08-18
Publication date: 2021-11-30
Also published as: JP2021185998A; JP6876852B1

Abstract

The invention provides a display cabinet, which can inhibit the leakage of circulated cold air to the outside of a commodity display room. The ventilation duct (6) is formed along the inner periphery of the showcase main body (2). The air duct has a blowing port (7) and a suction port (8), the blowing port (7) is located at the upper part of the front side and is opened downward, and the suction port (8) is located at the lower part of the front side and is opened upward. A fan (9) and a cooler (10) are disposed in the air duct, the fan (9) generates an air flow from the suction port to the discharge port, and the cooler (10) cools the air flowing in the air duct. The display cabinet further comprises a winding type wind shield (11), a detection part and a driving part (14), wherein the wind shield (11) is positioned at the position for opening and closing the opening part, the lower end part of the wind shield is wound on a winding shaft (12) with a horizontal axis, the upper end part of the wind shield can slide in the vertical direction, the detection part detects the approach condition of a shopper approaching the display cabinet, and the driving part enables the wind shield to slide in the vertical direction according to the detection result.

Description

Display cabinet

Technical Field

The present invention relates to a showcase in which commodities in a commodity display chamber are refrigerated and frozen by circulating cold air.

Background

In the past, in stores such as supermarkets and convenience stores, showcases in which commodities in a commodity display room are refrigerated or frozen by circulating cold air have been used. In such a display case, it is desired to reduce energy consumption required for generating cool air by suppressing leakage of the cool air from the inside of the merchandise display chamber. Further, it is desirable to prevent the occurrence of cold aisles (cold air accumulation) within the store.

As a showcase for suppressing leakage of cold air from a commodity display chamber, a showcase described in patent document 1 below is known. In the showcase described in patent document 1, a plate-shaped wind shield (windshield) is provided below an opening for taking out a commodity from a commodity display chamber.

Documents of the prior art

Patent document

Patent document 1 Japanese laid-open patent publication No. 2012-20001

Disclosure of Invention

Problems to be solved by the invention

However, in the display case described in patent document 1, the material of the windshield is glass and is provided in a fixed position, and the height cannot be appropriately adjusted according to the approach of the shopper to the display case.

In order to enhance the effect of suppressing the leakage of cold air from the interior of the merchandise display chamber, it is desirable to increase the height of the wind screen. However, if the height of the wind screen is increased, the performance of taking and placing the commodity from the commodity display chamber is deteriorated. Further, if the wind screen is raised, there is a problem that the shopping basket held by the customer is likely to be damaged by the wind screen.

The present invention has been made to solve the above problems, and an object of the present invention is to suppress leakage of cold air circulating in a showcase from inside a product display chamber, and to reduce energy consumption required for generating the cold air. In addition, occurrence of cold aisles in the shop is prevented.

Means for solving the problems

The display cabinet according to the present invention includes: a showcase main body having a product display portion inside and an opening portion on a front surface; a ventilation duct formed along an inner periphery of the showcase main body, having a blow-out port opened downward at an upper portion of a front side thereof and a suction port opened upward at a lower portion of the front side thereof; a fan disposed in the air duct, the fan generating a flow of air from the suction port to the discharge port in the air duct; a cooler disposed in the air duct and configured to cool air flowing in the air duct; a wind-up type wind deflector disposed at a position for opening and closing the opening, having a lower end wound around a wind-up shaft having a horizontal axis and an upper end slidable in a vertical direction; a detection unit for detecting the approach of a shopper approaching the display case, the in-store environment, and the busy condition in the store; and a driving unit that slides the wind deflector in the vertical direction based on a detection result of the detecting unit.

In addition, the above display case preferably includes: the driving part is arranged at the upper part of the display cabinet main body; a pair of left and right guide rails provided on the display cabinet main body and extending in the vertical direction; and a wire rod which is disposed in the guide rail and is slidable in the vertical direction, an upper end portion of which is connected to the driving portion, and a lower end portion of which is connected to upper portions on both end sides of the wind deflector.

In the above-described display case, preferably, when a plurality of display cases are arranged side by side, one drive unit is provided for each display case, or one drive unit is provided for a plurality of display cases.

In addition, the above display case preferably includes: a cylindrical rotary filter provided above the suction port; a coupling mechanism that couples the take-up shaft and the filter so that the filter rotates in accordance with rotation of the take-up shaft; and a brush contacting an outer circumferential surface of the spin filter.

In the above showcase, it is preferable that the amount of air blown by the fan is variable, and the amount of air blown by the fan is reduced when the upper end portion of the wind screen is at a high position.

ADVANTAGEOUS EFFECTS OF INVENTION

The present invention relates to a showcase in which a windup wind deflector is disposed at a position for opening and closing an opening. The wind deflector is configured such that a lower end portion thereof is wound around a winding shaft having a horizontal axis, and is slidable in the vertical direction in accordance with an upper end portion of the wind deflector. When the approach of a shopper approaching the display case, the in-store environment, or the in-store busy condition is detected by the detection unit, the drive unit is driven based on the detection result. When the driving portion is driven and the wind guard is wound around the winding shaft, the upper end portion of the wind guard slides toward the lower end, the lower end position of the opening portion is lowered, and the vertical opening width of the opening portion is increased. Therefore, the shopper can easily take out the merchandise in the display room from the opening. On the other hand, when the driving portion is driven and the wind deflector is pulled out from the wind-up shaft, the upper end portion of the wind deflector slides upward, the lower end position of the opening portion is raised, and the vertical opening width of the opening portion is narrowed. Therefore, the leakage of the cold air in the commodity display chamber from the opening portion can be suppressed. Further, energy consumption required for generating cold air can be reduced, and cold aisle leakage in stores can be prevented.

Further, when the wind deflector is slid in the vertical direction, the wire can be easily slid in the vertical direction by driving the driving portion.

In addition, when a plurality of display cases are arranged side by side, one driving unit may be provided for the plurality of display cases, and energy consumption of the driving unit required for sliding the wind deflector in the vertical direction may be reduced.

In addition, fine dust contained in the air sucked from the suction port adheres to the rotary filter. When the wind screen slides in the vertical direction and the winding shaft rotates, the rotary filter coupled to the winding shaft via the coupling mechanism rotates. The rotary filter is rotated, and dust attached to the rotary filter is removed by the brush. The removed dust falls in a lump and flows out of the discharge hole, or is caught by a discharge screen covering the discharge hole and removed at the time of cleaning. Therefore, the blocking of dust in the air at the suction port or the blocking at the discharge port can be prevented.

Further, when the upper end portion of the wind deflector is located at a high position, the distance from the air outlet to the upper end portion of the wind deflector is shortened. Thus, even if the amount of cold air blown by the fan is reduced, the curtain of cold air blown out from the outlet port does not break, and the cold air reaches the upper end portion of the wind screen. Therefore, the cooling performance in the commodity display chamber can be maintained, and the energy for driving the fan can be reduced.

Drawings

Fig. 1 is a side sectional view showing the overall structure of a display case of a first embodiment.

Fig. 2 is a front view showing the overall structure of the display case.

Fig. 3 is a perspective view showing the entire showcase in each case where the wind deflector slides in the vertical direction.

Fig. 4 is an enlarged side sectional view of the take-up shaft, the rotary filter, and the coupling mechanism.

Fig. 5 is a side sectional view showing the entire structure of the display case of the second embodiment.

Motor belt discharge screen

Detailed Description

A first embodiment of the present invention will be described with reference to fig. 1 to 4. Fig. 1 is a side sectional view showing a display case 1 installed in a store such as a supermarket or a convenience store. The showcase 1 has a showcase main body 2 whose sectional shape is formed in an コ shape. A commodity display chamber 3 is provided inside the showcase main body 2. The front surface of the showcase main body 2 is provided with an opening 4. Further, a plurality of commodity display shelves 5 are provided in the commodity display chamber 3 in the vertical direction.

An air duct 6 is formed in the display case main body 2 along an inner peripheral surface thereof. A blow-out port 7 is provided at one end of the air duct 6, and the blow-out port 7 is located at the upper portion of the front side of the showcase main body 2 and opens downward. A suction port 8 is provided at the other end of the air duct 6, and the suction port 8 is located at the lower part of the front side of the showcase main body 2 and opens upward. A fan 9 is disposed in the air duct 6, and the fan 9 generates a flow of air so as to suck air from the suction port 8 and blow out air from the blow-out port 7. Further, a cooler 10 is disposed in the air duct 6, and the cooler 10 cools air flowing in the air duct 6.

Further, in the showcase main body 2, a windguard 11 of a windguard type is provided at a position for opening and closing the opening 4. The lower end portion of the wind deflector 11 is wound around a winding shaft 12 having a horizontal axis and rotatable about the axis. The upper end portion of the wind deflector 11 is slidable in the vertical direction. When the upper end portion of the wind deflector 11 slides in the vertical direction, the lower end position of the opening 4 moves in the vertical direction, and the vertical opening width of the opening 4 changes.

A winding spring 13 is provided inside the winding shaft 12. When the wind-up shaft 12 rotates in a direction in which the upper end portion of the wind deflector 11 slides upward, the wind-up spring 13 winds up in the contraction direction. The wound winding spring 13 rotationally biases the winding shaft 12 in the opposite direction.

A motor 14 as a driving unit is disposed at an upper portion of the showcase main body 2. Further, a human body sensor (not shown) as a detection unit for detecting the approach of a shopper approaching the display case is disposed on the front side of the display case 1. The motor 14 is driven according to the detection result of the human body sensor, and the windshield 11 slides in the vertical direction by the driving. As shown in fig. 2, a pair of guide rails 15 extending in the vertical direction are provided on both left and right sides of the showcase main body 2. A wire 16 is disposed inside these guide rails 15 so as to be slidable in the vertical direction. The upper end portion of the wire 16 is wound around a spool 17 connected to the rotary shaft 14a of the motor 14. The lower end portions of the wires 16 are connected to both end side upper portions of the wind deflector 11.

In the present embodiment, a human body sensor for detecting the approach of a shopper approaching the display case 1 is used as the detection unit. However, the detection unit may use a sensor for detecting an in-store environment such as temperature or humidity or a sensor for detecting a busy state in a store, and the motor 14 may be driven according to the detection result of these sensors.

A cylindrical rotary filter 18 having a length substantially equal to the width direction length of the suction port 8 is provided at the lower portion of the suction port 8. The rotary filter 18 is a filter formed by winding a mesh into a cylindrical shape, and is provided to be rotatable about an axis in the horizontal direction. As shown in fig. 4, pulleys 19 are connected to both ends of the winding shaft 12, and pulleys 20 are connected to both ends of the rotary filter 18. A belt 21 is wound between the

pulleys

19 and 20, a coupling mechanism 22 is constituted by the

pulleys

19 and 20 and the belt 21, and the coupling mechanism 22 rotates the rotary filter 18 as the winding shaft 12 rotates.

A brush 24 attached to a brush attachment table 23 is disposed below the rotary filter 18. The brush 24 has a distal end portion abutting against the outer peripheral surface of the rotary filter 18.

The bottom of the air duct 6 is provided with a discharge hole 25 for discharging water or clean water bred in the display case 1. A discharge screen 26 is detachably mounted at an upper end of the discharge hole 25 for preventing foreign materials from entering the discharge hole 25.

In the present embodiment, the case where the

pulleys

19, 20 and the belt 21 are provided at both left and right ends of the winding shaft 12 is exemplified, but the

pulleys

19, 20 and the belt 21 may be provided only on one side of the winding shaft 12.

The amount of air blown by the fan 9 is variable, and when the upper end portion of the wind screen 11 is located at a high position, the amount of air blown is reduced. Specific methods for reducing the amount of air blown include reducing the number of revolutions of the fan 9, reducing the number of driving fans 9 when a plurality of fans 9 are provided, and the like. Further, when the air blowing amount is decreased, it is preferable that the air blowing amount is returned to the original state when the temperature of the commodity display chamber 3 is increased, and the temperature in the commodity display chamber 3 is decreased.

In the showcase 1 of the present embodiment, a case where the motor 14 for sliding the wind deflector 11 is provided in the showcase 1 is exemplified. However, in the case where a plurality of display cabinets 1 are arranged side by side, one motor 14 may be provided for a plurality of display cabinets 1. Furthermore, by sliding multiple wind deflectors 11 of a display case 1 with one motor 14, the energy consumption of the motor 14 necessary to slide the wind deflectors 11 can be reduced.

In this configuration, in the showcase 1, air is sucked from the suction port 8 by driving the fan 9, and the sucked air flows in the air duct 6 in the direction indicated by the arrow in fig. 1 and is blown downward from the air outlet 7. The air blown out from the air outlet 7 is again sucked from the air inlet 8. The air flowing through the air duct 6 is cooled by the cooler 10 into cold air, and the commodities in the commodity display chamber 3 are cooled by the cold air.

Next, in the showcase 1, the wind deflector 11 can be slid in the vertical direction as needed. The windshield 11 is slid by driving (opening and closing) the motor 14.

When the motor 14 is turned on and driven to rotate, the wire 16 is drawn upward and wound on the coil 17. Thereby, the wind deflector 11 slides upward. When the wind deflector 11 slides upward, the windup shaft 12 rotates in a direction in which the wind deflector 11 is pulled out. Then, the windshield 11 slides upward, so that the lower end position of the opening 4 (the upper end portion of the windshield 11) is increased, and the opening width of the opening 4 in the vertical direction is narrowed. When the wind-up shaft 12 rotates in the direction in which the wind deflector 11 slides upward, the wind-up spring 13 winds up along with the rotation. Then, when the motor 14 is turned off and rotation is stopped, and the motor 14 is locked in the rotation stopped state, the wind deflector 11 is held at the slide position.

When the locked state of the motor 14 is released, the force of the wound winding spring 13 is released, and the winding shaft 12 rotates in the opposite direction. The wind deflector 11 is wound around the winding shaft 12 by the reverse rotation of the winding shaft 12. By winding the wind deflector 11 around the winding shaft 12, the upper end of the wind deflector 11 slides downward, and the lower end position of the opening 4 (the upper end of the wind deflector 11) is gradually lowered, and the opening width of the opening 4 in the vertical direction is widened.

In the present embodiment, the force of the motor 14 is used to slide the wind deflector 11 upward, and the force of the return spring 13 is used to slide the wind deflector 11 downward. However, other motors may be used instead of the return spring 13. Further, the vertical sliding of the wind deflector 11 may be performed by a motor, which may be rotated in the forward or reverse direction.

Fig. 3(a) shows a state in which the upper end portion of the wind deflector 11 slides to the lowermost position. This state is a case where a shopper approaches the front of the showcase 1. In this state, when the shopper takes out the merchandise from the merchandise display chamber 3, the windshield 11 does not get in the way, and the shopper can easily take out the merchandise from the merchandise display chamber 3. Further, a shopping basket held by a shopper can be prevented from colliding against the wind deflector 11.

Fig. 3(b) shows a state in which the motor 14 is driven to slide the wind deflector 11 upward from the state of fig. 3 (a).

Fig. 3(c) shows a state in which the wind deflector 11 slides upward from the position shown in fig. 3 (b). In the case of fig. 3(c), the lower end position of the opening 4 is higher than in the case of fig. 3(b), while the opening width in the up-down direction of the opening 4 becomes narrower. The wind deflector 11 is switched from the state of fig. 3(a) to the state shown in fig. 3(b) or 3(c) by driving the motor 14 based on the detection result when the human body sensor detects that no shopper approaches the front of the showcase 1.

By sliding the wind deflector 11 to the upper position as shown in fig. 3(b) or 3(c), the lower end position of the opening 4 is increased, and the opening width of the opening 4 in the vertical direction is narrowed. Therefore, the leakage of the cool air in the commodity display chamber 3 from the opening 4 can be suppressed. Also, energy consumption required for generating cool air can be reduced. Further, it is possible to prevent the occurrence of a cold aisle caused by the accumulation of leaked cold air on the floor in the store.

Whether the wind deflector 11 is slid to the position shown in fig. 3(b) or the position shown in fig. 3(c) may be appropriately set according to the season, the type or number of products displayed in the product display chamber 3, and the like. For example, when it is desired to further reduce the leakage of cold air and improve the effect of keeping the cold within the merchandise display 3, the wind deflector 11 is slid to the upper position shown in fig. 3 (c).

On the other hand, switching from the state shown in fig. 3(b) or 3(c) to the state shown in fig. 3(a) is performed when the human body sensor detects that a shopper approaches the front of the showcase 1. The locked state of the motor 14 is released based on the detection result of the motion sensor, and the winding shaft 12 is rotated by the force of the winding spring 13 due to the release of the locked state. Due to this rotation, the wind deflector 11 is wound around the winding shaft 12 and slides downward.

Fig. 3(d) shows a state where the wind deflector 11 is slid to the highest position and the opening portion 4 is closed. The wind deflector 11 may be used as a so-called night cover for maintaining the cold insulation state in the commodity display room 3 for a long time at night.

The wire 16 that slides in the vertical direction as the windshield 11 slides in the vertical direction is disposed in the guide rail 15. Accordingly, the slide wire 16 can be prevented from colliding with various components located around the display counter 1, such as a shopping basket or a shopping bag held by a shopper, and the like.

When the wind deflector 11 slides in the vertical direction, the windup shaft 12 also rotates. Then, as the take-up shaft 12 rotates, the rotary filter 18 coupled to the take-up shaft 12 via the coupling mechanism 22 rotates. By the rotation of the rotary filter 18, dust attached to the rotary filter 18 is removed by the brush 24. The dust removed from the rotary filter 18 is formed into a lump and falls on the bottom surface of the air duct 6 to flow out of the discharge hole 25 together with water or to hang on a discharge screen 26 covering the discharge hole 25 to be removed at the time of cleaning. Therefore, the dust in the air can be prevented from blocking the suction port 8 or the discharge port 7.

Further, when the upper end portion of the wind shield 11 is located at a high position, the amount of cold air blown by driving the fan 9 can be reduced. This is because the distance from the air outlet 7 to the upper end portion of the wind deflector 11 is shortened, and even if the amount of cold air blown out from the air outlet 7 is reduced, the curtain of cold air does not break and the cold air reaches the upper end portion of the wind deflector 11.

A second embodiment of the present invention will be described with reference to fig. 5. Note that the same structures as those described in the first embodiment are denoted by the same reference numerals, and are not described again. Figure 5 illustrates one embodiment of a walk-in display case 27. The walk-in showcase 27 has a rectangular showcase main body 28, a display stand 29 serving as a product display portion is disposed on a front side of the showcase main body 28, and a storage stand 30 is disposed on a rear side of the showcase main body 28.

A plurality of stages of shelves 31 are provided in the vertical direction in the display rack 29, and the products to be sold are displayed on these shelves 31. The merchandise items displayed on the shelf 31 are stored in the storage rack 30. A working space 32 is provided between the display rack 29 and the storage rack 30, and is used for displaying the commodities in the storage rack 30 on the shelf 31. Further, an openable and closable rear side door 33 is provided on the rear side of the display rack 29. The rear side door 33 is normally closed and opened when merchandise is displayed on the shelf 31.

An opening 34 is formed on the front side of the showcase main body 28 for a shopper to take out a commodity from the shelf plate 31.

An air duct 35 is formed in the display case main body 28, and air circulates in the air duct 35 in the display case main body 28. Further, the working space 32 serves as a part of the air duct 35. The air outlet 36 is provided at one end of the air duct 35, and the air outlet 36 is located at the upper front side of the showcase main body 28 and opens downward. The suction port 37 is provided at the other end of the air duct 35, and the suction port 37 is located at the lower portion of the front side of the showcase main body 28 and opens upward.

Fans

38a and 38b are disposed in air duct 35, and

fans

38a and 38b generate an air flow that draws air in from intake port 37 and blows out the air from blow-out port 36. Further, a cooler 39 is disposed in the air duct 35, and the cooler 39 cools air flowing in the air duct 35.

In the showcase main body 28, the windguard 11 of the windguard type is provided at a position where the opening 34 is opened and closed. The wind deflector 11 has a lateral width dimension slightly larger than that of the opening portion 34. The lower end portion of the wind deflector 11 is wound around a winding shaft 12 having a horizontal axis and rotatable about the axis. The upper end portion of the wind deflector 11 is slidable in the vertical direction. When the upper end portion of the windshield 11 slides in the vertical direction, the lower end position of the opening 34 moves in the vertical direction, and the vertical opening width of the opening 34 changes.

The motor 14 is disposed on the upper portion of the showcase main body 28. The motor 14 is connected to the upper end of the wind deflector 11 via a wire 16. Then, the windshield 11 slides in the vertical direction by driving the motor 14, and the opening width of the opening 34 in the vertical direction is changed.

In such a configuration, the walk-in showcase 27 can slide the wind deflector 11 in the vertical direction by driving the motor 14 according to whether a shopper approaches the showcase main body 28, the in-store environment, or the busy condition in the store. Further, by sliding the wind deflector 11 upward, leakage of cold air to the outside of the showcase main body 28 can be suppressed. This suppression can reduce energy consumption required for generating cold air. Further, it is possible to prevent the occurrence of a cold aisle where leaked cold air collects on the floor inside the store. On the other hand, by sliding the wind deflector 11 downward, the shopper can easily take out the merchandise on the shelf plate 31.

Reference numerals:

1 show cabinet

2 main body of display cabinet

3 Commodity display room (Commodity display part)

4 opening part

5 Commodity display shelf

6 ventilating duct

7 blow-out port

8 suction ロ

9 Fan

10 cooler

11 wind screen

12 winding shaft

13 coil spring

14 Motor (drive part)

14a motor shaft

15 guide rail

16 wire rod

17 wire coil

18 rotary filter

19 Pulley

20 pulley

21 band

22 connecting mechanism

23 Brush mount table

24 brushes

25 discharge hole

26 discharge sieve

27 walk-in type display cabinet

28 show cabinet main body

29 display rack (merchandise display part)

30 support for keeping

31 shelf board

32 work space

33 Back side door

34 opening part

35 air duct

36 blow-out port

37 suction inlet

38a 38b Fan

39 cooler

Claims

1. A display case, comprising:

a showcase main body having a product display portion inside and an opening portion on a front surface;

a ventilation duct formed along an inner periphery of the showcase main body, having a blow-out port opened downward at an upper portion of a front side thereof and a suction port opened upward at a lower portion of the front side thereof;

a fan disposed in the air duct, the fan generating a flow of air from the suction port to the discharge port in the air duct;

A cooler disposed in the air duct and configured to cool air flowing in the air duct;

a wind-up type wind deflector disposed at a position for opening and closing the opening, having a lower end wound around a wind-up shaft having a horizontal axis and an upper end slidable in a vertical direction;

a detection unit for detecting the approach of a shopper approaching the display case, the in-store environment, and the busy condition in the store; and

and a driving unit that slides the wind deflector in the vertical direction based on a detection result of the detecting unit.

2. The display case of claim 1, having:

the driving part is arranged at the upper part of the display cabinet main body;

a pair of left and right guide rails provided on the display cabinet main body and extending in the vertical direction; and

and a wire rod which is disposed in the guide rail and is slidable in the vertical direction, an upper end portion of which is connected to the driving portion, and a lower end portion of which is connected to upper portions on both end sides of the wind deflector.

3. The display case of claim 2,

when a plurality of display cabinets are arranged side by side, each display cabinet is provided with one driving part, or the plurality of display cabinets are provided with one driving part.

4. A display case as claimed in any one of claims 1 to 3, having:

a cylindrical rotary filter provided above the suction port;

a coupling mechanism that couples the take-up shaft and the filter so that the filter rotates in accordance with rotation of the take-up shaft; and

and a brush contacting an outer circumferential surface of the spin filter.

5. The display case of any one of claims 1 to 4,

the amount of air blown by the fan is variable, and the amount of air blown is reduced when the upper end portion of the wind screen is located at a high position.