Show case

Abstract

To suppress generation of dew condensation of a door body for blocking a front opening.SOLUTION: A show case 1 for cooling commodities mounted on commodity mounting shelves 12 includes: a case body 10 provided with a door body 17 in the form of opening / closing a front opening 10a formed on a front surface; the commodity mounting shelves 12 provided in a plurality of stages along a vertical direction in a storage chamber 11 provided inside the case body 10 in the form of facing the front opening 10a; a circulation fan 21 for circulating air between the inside and the outside of the storage chamber 11 in the form of sucking air of the storage chamber 11 from a suction port 141 opening in a front lower part of the storage chamber 11, and blowing air to the storage chamber 11 from an air outlet 142 opening in a front upper part of the storage chamber 11; and a cooling unit 22 for cooling air circulated by the circulation fan 21. The show case also includes a blower fan 26 for sending air out toward an upper side inner surface 17a of the door body 17 blocking the front opening 10a.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a showcase. [Background technology]

[0002] Conventionally, a known showcase has multiple product placement shelves arranged vertically in a storage chamber facing the front opening of the case body. Some such showcases are retrofitted with a door that opens and closes the front opening in order to reduce power consumption (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-161345 Summary of the Invention [Problem to be solved by the invention]

[0004] In the showcase of Patent Document 1, when the door body closes the front opening, air pockets tend to form near the upper inner surface of the door body, causing condensation on the upper inner surface. In particular, when the door body is installed after the fact, the distance between the air outlet and the door body becomes relatively large, making it easy for air pockets to form near the upper inner surface of the door body that closes the front opening, resulting in significant condensation on the upper inner surface.

[0005] In view of the above-mentioned circumstances, an object of the present invention is to provide a showcase that can suppress the occurrence of condensation on a door body that closes a front opening. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the showcase of the present invention comprises a case body having a door body that opens and closes a front opening formed on the front, a storage chamber that is arranged inside the case body facing the front opening, a product storage shelf that is arranged in multiple tiers along the vertical direction in a storage chamber, a circulation fan that circulates air between the inside and outside of the storage chamber in a manner that draws in air from an intake port that opens at the front lower part of the storage chamber and blows air into the storage chamber from an outlet port that opens at the front upper part of the storage chamber, and a cooling unit that cools the air circulated by the circulation fan, and is characterized in that the showcase cools products placed on the product storage shelf, and is equipped with a blower fan that blows air toward the upper inner surface of the door body that closes the front opening.

[0007] The present invention is also characterized in that, in the above-mentioned showcase, the blower fan is installed inside a canopy that forms the upper front end of the case body, and blows out air through ventilation holes formed in the canopy.

[0008] The present invention is also characterized in that, in the above-mentioned showcase, the blower fan takes in a portion of the air blown out from the outlet through an intake hole formed in the canopy and sends out the air through the ventilation hole.

[0009] Furthermore, the present invention is characterized in that the showcase further comprises an air direction member for guiding a portion of the air blown out from the air outlet toward the air intake hole.

[0010] The present invention is also characterized in that the above-mentioned showcase is provided with an opening / closing detection unit that detects the opening and closing of the front opening, and a control unit that drives the blower fan on the condition that the opening / closing detection unit detects that the front opening is blocked.

[0011] The present invention is also characterized in that the above-mentioned showcase is provided with a temperature and humidity sensor that detects the temperature and humidity around the case body, and the control unit drives the blower fan when the detection result of the temperature and humidity sensor meets predetermined driving conditions.

[0012] Furthermore, a showcase according to the present invention comprises a case body having a door body provided in a manner that opens and closes a front opening formed on the front surface, a storage chamber provided inside the case body facing the front opening, product storage shelves provided in multiple tiers along the vertical direction in a manner that opens to the front opening, a circulation fan that circulates air between the inside and outside of the storage chamber in a manner that draws in air from the storage chamber through an intake port opening at the front lower part of the storage chamber and blows air into the storage chamber through an outlet opening at the front upper part of the storage chamber, and a cooling unit that cools the air circulated by the circulation fan, and is a showcase for cooling products placed on the product storage shelves, and further comprises a straightening member that is arranged in a manner that closes the outlet and straightens the flow of air blown out from the outlet, the straightening member having a slit formed in its front end portion and that relatively increases the wind speed of air passing through the slit and sends the air toward the upper inner surface of the door body that closes the front opening.

[0013] Furthermore, in the showcase of the present invention, the rectifying member is formed in such a manner that the thickness thereof gradually decreases as it approaches the slit.

[0014] Furthermore, in the showcase of the present invention, the flow straightening member has a honeycomb structure.

[0015] Furthermore, the present invention is characterized in that in the showcase, the door body is a heat insulating glass door. [Effects of the Invention]

[0016] According to the present invention, the blower fan blows air toward the upper inner surface of the door body that blocks the front opening, thereby preventing air from accumulating near the upper inner surface of the door body and suppressing condensation on the door body that blocks the front opening.

[0017] Furthermore, according to the present invention, the straightening member that is arranged in a manner that blocks the air outlet and straightens the flow of air blown out from the air outlet has a slit formed at the front end portion, and the wind speed of the air passing through the slit is relatively increased so that the air is sent toward the upper inner surface of the door body that blocks the front opening.As a result, the air that passes through the slit flows toward the upper inner surface of the door body while carrying with it surrounding air, which prevents air from accumulating near the upper inner surface of the door body and has the effect of suppressing condensation on the door body that blocks the front opening. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a cross-sectional side view schematically showing the internal structure of a showcase according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a block diagram that schematically shows a characteristic control system of the showcase according to the first embodiment of the present invention. [Figure 3] FIG. 3 is a front view of the showcase shown in FIG. [Figure 4] 4 is an enlarged cross-sectional side view showing a main part of the showcase shown in FIG. [Figure 5] FIG. 5 is a flowchart showing the details of the blower fan drive control process performed by the control unit shown in FIG. [Figure 6] FIG. 6 is a cross-sectional side view schematically showing the internal structure of a showcase according to the second embodiment of the present invention. [Figure 7] FIG. 7 is an enlarged cross-sectional side view showing a main part of the showcase shown in FIG. [Figure 8] FIG. 8 is an enlarged cross-sectional side view showing a main part of a modified example of the showcase shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a showcase according to the present invention will be described in detail below with reference to the accompanying drawings.

[0020] <First Embodiment> Figures 1 and 2 each show a showcase according to embodiment 1 of the present invention, where Figure 1 is a cross-sectional side view showing the internal structure, and Figure 2 is a block diagram showing the characteristic control system.

[0021] The showcase 1 illustrated here is one that is installed in stores such as convenience stores and supermarkets, and includes a case body 10.

[0022] The case body 10 is a substantially rectangular heat-insulating housing with an opening 10a (hereinafter also referred to as the "front opening") formed on the front side. The case body 10 is provided with a storage chamber 11, a ventilation passage 13, a canopy 15, and a door body 17.

[0023] The storage room 11 is a room formed in a manner facing the front opening 10a. In this storage room 11, a plurality of (six in the illustrated example) product placement shelves 12 are provided in multiple levels along the vertical direction.

[0024] The product placement shelves 12 are conventionally known and each include a shelf board 12a. The shelf board 12a is a substantially flat member, and its upper surface forms a placement surface on which products are placed. The shelf board 12a is mounted on a pair of left and right bracket members 12b via rail members (not shown). The shelf board 12a is slidable in the front-to-rear direction relative to the bracket members 12b.

[0025] The ventilation passage 13 is formed inside the case body 10 and outside the storage chamber 11, and is an air passage from the intake port 141 to the air outlet 142.

[0026] Suction port 141 is an opening for drawing in air inside storage chamber 11, and is elongated and extends in the left-right direction. Suction port 141 opens at the lower front edge of storage chamber 11, i.e., at the front lower part of storage chamber 11.

[0027] The air outlet 142 is an opening for blowing air into the interior of the storage chamber 11. The air outlet 142 is provided to extend in the left-right direction and is provided at the upper front edge of the storage chamber 11, i.e., at the front upper part of the storage chamber 11.

[0028] A honeycomb-structured straightening member 19 is provided at this air outlet 142 in a manner that closes the air outlet 142. The straightening member 19 straightens the flow of air passing through it, i.e., the air blown out from the air outlet 142. A slit 19a is formed in the rear end portion of this straightening member 19, and the thickness of the member is configured to gradually decrease as it approaches the slit 19a.

[0029] Such ventilation passage 13 comprises a lower duct 13a located below and outside the storage room 11, a rear duct 13b located behind and outside the storage room 11, and an upper duct 13c located above and outside the storage room 11, and these lower duct 13a, rear duct 13b and upper duct 13c are connected to one another.

[0030] A circulation fan 21 and an evaporator 22a are installed inside such ventilation duct 13. The circulation fan 21 is equipped with a circulation fan drive unit, such as a motor, and is driven by commands given from a control unit 27, which will be described later. This circulation fan 21 circulates air when driven. In the showcase 1, when the circulation fan 21 is driven, air drawn into the ventilation duct 13 through the suction port 141 is sent to the outlet 142, and then blown out from the outlet 142 into the storage chamber 11. In this way, the circulation fan 21 circulates air between the storage chamber 11 and the ventilation duct 13, i.e., between the inside and outside of the storage chamber 11.

[0031] The evaporator 22a is connected in a circular fashion to a compressor, a condenser, and an electronic expansion valve (not shown) through refrigerant pipes, thereby constituting the cooling unit 22 that circulates the refrigerant. The cooling unit 22 (mainly the compressor) is driven by commands given from the control unit 27.

[0032] This evaporator 22a exchanges heat between the refrigerant supplied to it and the air passing through the ventilation path 13 as the circulation fan 21 is driven, and more specifically, cools the air passing through the ventilation path 13 by evaporating the refrigerant.

[0033] The canopy 15 constitutes the upper front end of the case body 10 and forms the upper edge of the front opening 10a. A light source 16, such as a fluorescent lamp, is installed below the canopy 15 so as to illuminate downward.

[0034] 3, the door body 17 has a left front door 17L and a right front door 17R. The left front door 17L is a heat-insulating glass door large enough to close the left half of the front opening 10a of the case body 10. The upper and lower ends of the left end portion of the left front door 17L are pivotally supported, allowing it to swing in the front-to-rear direction.

[0035] The right front door 17R is a heat-insulating glass door large enough to close the right half of the front opening 10a of the case body 10. The upper and lower ends of the right end portion of the right front door 17R are pivotally supported, allowing it to swing in the front-to-rear direction.

[0036] The showcase 1 includes a setting input unit 23, an open / close detection unit 24, a temperature and humidity sensor 25, a blower fan 26, and a control unit 27 in addition to the above configuration.

[0037] The setting input unit 23 is provided, for example, on the front surface of the canopy 15, and is an operation portion for inputting various settings. The open / close detection unit 24 is provided near the front opening 10a of the case body 10. This open / close detection unit 24 is turned off when the front opening 10a is closed by the door body 17 (the left front door 17L and the right front door 17R), and is turned on when at least one of the left front door 17L and the right front door 17R swings forward to open the front opening 10a, thereby sending an on signal to the control unit 27. The temperature and humidity sensor 25 is a detection means for detecting the temperature and humidity around the case body 10. The detection result of this temperature and humidity sensor 25 is provided to the control unit 27 as a detection signal.

[0038] The blower fan 26 is disposed inside the canopy 15. The blower fan 26 includes a blower fan drive unit such as a motor, and is driven by a command given from the control unit 27. In this embodiment, as shown in FIG. 3, the number of blower fans 26 provided corresponds to the number of doors constituting the door body 17. More specifically, blower fans 26 are provided above the left front door 17L and above the right front door 17R.

[0039] As shown in Figure 4, when the blower fan 26 is driven, it takes in air from the storage room 11 (mainly a portion of the air blown out from the outlet 142) into the canopy 15 through an intake hole 151 formed in the canopy 15, and then blows the air out through a ventilation hole 152 formed in the canopy 15 to the upper inner surface 17a of the door body 17 that closes the front opening 10a.

[0040] The control unit 27 comprehensively controls the operation of each unit of the showcase 1 in accordance with the programs and data stored in the storage unit 28. The control unit 27 may be realized by, for example, having a processing device such as a CPU (Central Processing Unit) execute a program, that is, by software, or by hardware such as an IC (Integrated Circuit), or by using both software and hardware.

[0041] In the showcase 1 having the above-described configuration, the control unit 27 drives the circulation fan 21 while driving the cooling unit 22, thereby cooling the air circulating between the storage room 11 and the ventilation passage 13, and cooling the products placed on each product storage shelf 12.

[0042] When the circulation fan 21 and the cooling unit 22 are driven to cool the products in this way, the control unit 27 performs the following blower fan drive control process.

[0043] FIG. 5 is a flowchart showing the details of the blower fan drive control process performed by the control unit 27 shown in FIG.

[0044] 5, the control unit 27 determines whether the open / close detection unit 24 is off (step S101). If the open / close detection unit 24 is not off (step S101: No), that is, if the open / close detection unit 24 is on and at least a part of the front opening 10a is open, the control unit 27 issues a command to the blower fan drive unit to stop driving the blower fan 26 (step S102), and then returns the procedure to end the current processing.

[0045] On the other hand, if the open / close detection unit 24 is off (step S101: Yes), the control unit 27 determines whether or not a detection signal is input from the temperature and humidity sensor 25 (step S103). If a detection signal is not input from the temperature and humidity sensor 25 (step S103: No), the control unit 27 repeats the above process.

[0046] On the other hand, if a detection signal is input from the temperature and humidity sensor 25 (step S103: Yes), the control unit 27 reads out the driving condition information for driving the blower fan 26 from the memory unit 28, and determines whether the detection result from the temperature and humidity sensor 25 satisfies the preset driving conditions (step S104).

[0047] If the detection result of the temperature and humidity sensor 25 does not satisfy the drive condition (step S104: No), the control unit 27 repeats the process of step S103. On the other hand, if the detection result of the temperature and humidity sensor 25 satisfies the drive condition (step S104: Yes), the control unit 27 issues a command to the blower fan drive unit to drive the blower fan 26 (step S105), and then returns the procedure to end the current process.

[0048] According to this, the blower fan 26 takes in air from the storage room 11 (mainly a portion of the air blown out from the outlet 142) into the inside of the canopy 15 through the intake hole 151, and then sends the air out through the ventilation hole 152 to the upper inner surface 17a of the door body 17 that closes the front opening 10a.

[0049] In this way, the control unit 27 drives the blower fan 26 when the detection result of the temperature and humidity sensor 25 satisfies the predetermined driving conditions, while the opening / closing detection unit 24 detects that the front opening 10a is blocked.

[0050] Incidentally, when the control unit 27 stops the operation of the cooling unit 22 to perform defrosting operation to remove frost that has adhered to the evaporator 22a, or when it stops cooling the products placed on each product storage shelf 12, it issues a command to the blower fan drive unit to stop the operation of the blower fan 26.

[0051] As described above, according to the showcase 1 which is embodiment 1 of the present invention, the blower fan 26 blows air toward the upper inner surface 17a of the door body 17 which blocks the front opening 10a, thereby preventing air from accumulating near the upper inner surface 17a of the door body 17 and suppressing condensation on the door body 17 which blocks the front opening 10a.

[0052] According to the showcase 1, the blower fan 26 is arranged inside the canopy 15, so there is no risk that the blower fan 26 will be visible to users of the showcase 1, and the showcase 1 can be designed to be good.

[0053] According to the showcase 1, the control unit 27 drives the blower fan 26 when the opening / closing detection unit 24 detects that the front opening 10a is blocked, and when the detection result of the temperature and humidity sensor 25 satisfies predetermined driving conditions. Therefore, the blower fan 26 is driven only in situations where condensation is likely to occur, thereby reducing power consumption.

[0054] According to the above-mentioned showcase 1, when the control unit 27 stops the operation of the cooling unit 22 to perform defrosting operation to remove frost adhering to the evaporator 22a, or when it stops cooling the products placed on each product storage shelf 12, it issues a command to the blower fan drive unit to stop the operation of the blower fan 26, which also helps to reduce power consumption.

[0055] <Embodiment 2> FIG. 6 is a cross-sectional side view schematically showing the internal structure of a showcase according to the second embodiment of the present invention.

[0056] The showcase 2 illustrated here is one that is installed in stores such as convenience stores and supermarkets, and includes a case body 30.

[0057] The case body 30 is a substantially rectangular heat-insulating housing with an opening 30a (hereinafter also referred to as the "front opening") formed on the front side. The case body 30 is provided with a storage chamber 31, a ventilation passage 33, a canopy 35, and a door body 37.

[0058] The storage room 31 is a room formed in a manner facing the front opening 30a. In this storage room 31, a plurality of (six in the illustrated example) product placement shelves 32 are provided in multiple levels along the vertical direction.

[0059] The product placement shelves 32 are conventionally known and each include a shelf board 32a. The shelf board 32a is a substantially flat member, and its upper surface forms a placement surface on which products are placed. The shelf board 32a is mounted on a pair of left and right bracket members 32b via rail members (not shown). The shelf board 32a is slidable in the front-to-rear direction relative to the bracket members 32b.

[0060] The ventilation passage 33 is formed inside the case body 30 and outside the storage chamber 31, and is an air passage from the intake port 341 to the air outlet 342.

[0061] The suction port 341 is an opening for drawing in air inside the storage chamber 31, and is elongated and extends in the left-right direction. The suction port 341 opens at the lower front edge of the storage chamber 31, i.e., at the front lower part of the storage chamber 31.

[0062] The air outlet 342 is an opening for blowing air into the interior of the storage chamber 31. The air outlet 342 is provided to extend in the left-right direction and is provided at the upper front edge of the storage chamber 31, i.e., at the front upper part of the storage chamber 31.

[0063] A honeycomb-structured straightening member 39 is provided at this air outlet 342 in a manner that closes the air outlet 342. The straightening member 39 straightens the flow of air passing through it, i.e., the air blown out from the air outlet 342. As shown in Fig. 7, this straightening member 39 has a slit 39a formed in its front end portion, and is configured so that its thickness gradually decreases as it approaches the slit 39a.

[0064] Such ventilation passage 33 comprises a lower duct 33a located below and outside the storage room 31, a rear duct 33b located behind and outside the storage room 31, and an upper duct 33c located above and outside the storage room 31, and these lower duct 33a, rear duct 33b and upper duct 33c are connected to one another.

[0065] A circulation fan 41 and an evaporator 42a are installed inside such ventilation duct 33. The circulation fan 41 is equipped with a circulation fan drive unit, such as a motor, and is driven by commands given from a control unit (not shown). This circulation fan 41 circulates air when driven. In the showcase 2, when the circulation fan 41 is driven, air drawn into the ventilation duct 33 through the suction port 341 is sent to the outlet 342, and then blown out from the outlet 342 into the storage chamber 31. In this way, the circulation fan 41 circulates air between the storage chamber 31 and the ventilation duct 33, i.e., between the inside and outside of the storage chamber 31.

[0066] The evaporator 42a is connected to a compressor, a condenser, and an electronic expansion valve (not shown) in a circular arrangement with refrigerant pipes to form a cooling unit that circulates the refrigerant. The cooling unit (mainly the compressor) is driven by commands given from the control unit.

[0067] This evaporator 42a exchanges heat between the refrigerant supplied to it and the air passing through the ventilation path 33 as the circulation fan 41 is driven, and more specifically, cools the air passing through the ventilation path 33 by evaporating the refrigerant.

[0068] The canopy 35 constitutes the upper front end of the case body 30 and forms the upper edge of the front opening 30a. A light source 36, such as a fluorescent lamp, is installed below the canopy 35 so as to illuminate downward.

[0069] The door body 37 has a left front door 37L and a right front door (not shown). The left front door 37L is a heat-insulating glass door large enough to close the left half of the front opening 30a of the case body 30. The upper and lower ends of the left end portion of the left front door 37L are pivotally supported, allowing it to swing in the front-to-rear direction.

[0070] The right front door is a heat-insulating glass door large enough to close the right half of the front opening 30a of the case body 30. The upper and lower ends of the right end portion of the right front door are pivotally supported, allowing it to swing back and forth.

[0071] In the showcase 2 having the above-described configuration, the control unit drives the circulation fan 41 while driving the cooling unit, thereby cooling the air circulating between the storage room 31 and the ventilation duct 33, and cooling the products placed on each product storage shelf 32.

[0072] As described above, the straightening member 39 has a slit 39a formed in its front end portion, and is configured so that its thickness gradually decreases as it approaches the slit 39a. This allows the wind speed of the air passing through the slit 39a to be relatively greater than the wind speed of the air on the rear side of the slit 39a, and the air that has passed through the slit 39a is sent toward the upper inner surface 37a of the door body 37 that closes the front opening 30a.

[0073] As described above, according to the showcase 2 which is the second embodiment of the present invention, the straightening member 39 arranged in a manner to block the air outlet 342 has a slit 39a formed at the front end portion, and the wind speed of the air passing through the slit 39a is relatively increased, causing the air to be sent toward the upper inner surface 37a of the door body 37 which blocks the front opening 30a. Therefore, the air which passes through the slit 39a flows toward the upper inner surface 37a of the door body 37 while incorporating surrounding air, thereby preventing air from accumulating near the upper inner surface 37a of the door body 37 and suppressing condensation on the door body 37 which blocks the front opening 30a.

[0074] According to the showcase 2, the straightening member 39 is configured so that its thickness gradually decreases as it approaches the slit 39a, so that the wind speed of the air passing through the straightening member 39 can be increased toward the front side, making it easier to send the air toward the upper inner surface 37a of the door body 37 that blocks the front opening 30a.

[0075] Although the first and second embodiments of the present invention have been described above, the present invention is not limited to these and various modifications can be made.

[0076] 8 is a cross-sectional side view showing a main part of a modified example of the showcase 1 according to the above-described embodiment 1. The same components as those in the showcase 1 according to the above-described embodiment 1 are given the same reference numerals and their description will be omitted. The showcase 3 illustrated here includes a straightening member 51 and an airflow direction member 52.

[0077] The flow rectifying member 51 has a honeycomb structure and is provided in a manner that closes the air outlet 142. The flow rectifying member 51 regulates the flow of air passing through it, i.e., the air blown out from the air outlet 142. The flow rectifying member 51 has a slit 51a formed in the front end portion, and is configured so that the thickness gradually decreases with increasing distance from the slit 51a.

[0078] The airflow direction member 52 is formed by bending, for example, a metal plate, and is attached to the airflow rectifying member 51. The airflow direction member 52 serves to guide a portion of the air blown out from the air outlet 142, i.e., the air that has passed through the slits 51a of the airflow rectifying member 51, toward the intake hole 151.

[0079] According to such a showcase 3, the blower fan 26 can actively send the air blown out from the air outlet 142 to the upper inner surface 17a of the door body 17, thereby preventing air from accumulating near the upper inner surface 17a of the door body 17 and suppressing condensation on the door body 17 that blocks the front opening 10a.

[0080] In the above-described first embodiment, the control unit 27 drives the blower fan 26 when the detection result of the temperature and humidity sensor 25 satisfies predetermined driving conditions, provided that the opening / closing detection unit 24 detects that the front opening 10a is blocked. However, in the present invention, the blower fan may also be driven when the opening / closing detection unit detects that the front opening is blocked.

[0081] In the above-described first embodiment, a temperature and humidity sensor 25 is provided, and the blower fan 26 is driven in accordance with the detection results of the temperature and humidity sensor 25. However, in the present invention, the temperature and humidity sensor is merely an example, and a condensation sensor may be used instead of the temperature and humidity sensor.

[0082] Although not specifically mentioned in the above-described first embodiment, the control unit may increase the rotation speed of the blower fan for a predetermined period of time when the open / close detection unit switches from on to off.

[0083] In the above-mentioned first and second embodiments, the left front door 17L, 37L and the right front door 17R constituting the door body 17, 37 were able to swing in the front-to-back direction, but in the present invention, they may be able to slide in the left-to-right direction as long as the front opening can be opened and closed. [Explanation of symbols]

[0084] 1...showcase, 10...case body, 10a...front opening, 11...storage room, 12...product placement shelf, 13...ventilation duct, 13a...lower duct, 13b...rear duct, 13c...upper duct, 141...intake port, 142...blowout port, 15...canopy, 151...intake hole, 152...ventilation hole, 16...light source, 17...door body, 17a...upper inner surface, 17L...left front door, 17R...right front door, 19...rectifying member, 21...circulation fan, 22...cooling unit, 22a...evaporator, 23...setting input section, 24...open / close detection section, 25...temperature and humidity sensor, 26...blower fan, 27...control section, 28...memory section.

Claims

1. a case body having a door provided in a manner to open and close a front opening formed on the front surface; a storage chamber provided inside the case body facing the front opening, the storage chamber having a plurality of product placement shelves provided along a vertical direction; a circulation fan that circulates air between the inside and outside of the storage chamber by sucking air into the storage chamber through an intake port that opens at a front lower portion of the storage chamber and blowing air into the storage chamber through an outlet that opens at a front upper portion of the storage chamber; a cooling unit that cools the air circulated by the circulation fan; A showcase for cooling products placed on the product placement shelf, comprising: The showcase is characterized by comprising a blower fan that blows air toward the upper inner surface of the door body that closes the front opening.

2. 2. The showcase according to claim 1, wherein the blower fan is installed inside a canopy that constitutes the upper front end of the case body, and blows air through ventilation holes formed in the canopy.

3. The showcase according to claim 2, wherein the blower fan takes in a portion of the air blown out from the outlet through an intake hole formed in the canopy and sends out the air through the ventilation hole.

4. 4. The showcase according to claim 3, further comprising an airflow direction member for guiding a portion of the air blown out from the air outlet toward the intake hole.

5. an opening / closing detection unit that detects whether the front opening is open or closed; a control unit that drives the blower fan on condition that the opening / closing detection unit detects that the front opening is closed; 2. The showcase according to claim 1, further comprising:

6. a temperature and humidity sensor for detecting the temperature and humidity around the case body; 6. The showcase according to claim 5, wherein the control unit drives the blower fan when the detection result of the temperature and humidity sensor satisfies a predetermined driving condition.

7. a case body having a door provided in a manner to open and close a front opening formed on the front surface; a storage chamber provided inside the case body facing the front opening, the storage chamber having a plurality of product placement shelves provided along a vertical direction; a circulation fan that circulates air between the inside and outside of the storage chamber by sucking air into the storage chamber through an intake port that opens at a front lower portion of the storage chamber and blowing air into the storage chamber through an outlet that opens at a front upper portion of the storage chamber; a cooling unit that cools the air circulated by the circulation fan; A showcase for cooling products placed on the product placement shelf, comprising: a straightening member disposed in a manner to close the air outlet and straightening the flow of air blown out from the air outlet; The straightening member has a slit formed at the front end portion, and the air speed of the air passing through the slit is relatively increased, thereby sending the air toward the upper inner surface of the door body that closes the front opening.

8. 8. The showcase according to claim 7, wherein the flow regulating member is formed so that its thickness gradually decreases as it approaches the slit.

9. 9. The showcase according to claim 7, wherein the flow straightening member has a honeycomb structure.

10. 10. The showcase according to claim 1, wherein the door body is a heat-insulating glass door.

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