JP2017129345A - Showcase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrict the lower part of the upper region of an intermediate duct in a storage chamber to be locally cold temperature.SOLUTION: A showcase comprises: a first air duct that is provided inside a case body 10 separately from a storage chamber 12 and in which air sucked in the storage chamber 12 is cooled by an evaporator 41 and blown out into the storage chamber 12; a second air duct that is provided inside the case body 10 in a manner that partly shares the first air duct while separating from the storage chamber 12 and in which air sucked in the storage chamber 12 is blown out into the storage chamber 12; an intermediate duct 50 that is provided in the storage chamber 12 in a manner that blocks the first air duct and in which air cooled by the evaporator 41 is blown out; a heater 60 for partly heating the air passing through the second air duct by driving the heater; and a delivery fan 70 for sending out part of the air heated by the heater 60 toward the intermediate duct 50 by driving the fan in a manner that makes it pass through the downstream side of a part blocked by the intermediate duct 50 in the first air duct.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a showcase that holds products displayed on a product display shelf at at least two temperatures.

  Conventionally, the following is known as a showcase for holding products displayed on a product display shelf at at least two temperatures.

  For example, a plurality of product display shelves are arranged in the storage chamber inside the case body formed with the front opening so as to be arranged in the vertical direction, and the products are placed and displayed on the respective product display shelves. . In addition, two air passages for the air sucked through the suction port are formed inside the case body and outside the storage chamber, and the air passing through one of the air passages is formed in the upper portion of the storage chamber. The air is blown out from the upper outlet. The other air air passage is provided with an evaporator for cooling the air passing therethrough, and the air cooled by the evaporator is passed through an intermediate duct provided at an intermediate height position of the storage chamber from an intermediate outlet. Blown out. The air blown out from the upper outlet and the air blown out from the intermediate outlet form an air curtain at the front opening of the case body by being sucked into the inlet.

  In such a showcase, the storage room has two different temperature zones, a region where the temperature is adjusted by the air blown from the upper outlet and a region where the temperature is adjusted by the air blown from the intermediate outlet. The products formed and displayed on the product display shelf in each temperature band are adjusted to a desired temperature state. More specifically, the air blown out from the intermediate air outlet cools the product displayed on the product display shelf in the region below the intermediate duct as a low temperature zone, and the high temperature above the intermediate duct. The product displayed on the product display shelf in the area as a band is adjusted to a desired temperature (see, for example, Patent Document 1).

Japanese Patent No. 4636505

  By the way, in the above-mentioned showcase, since the lower region from the intermediate duct is the low temperature zone and the upper region from the intermediate duct is the high temperature zone, the cold air from the low temperature zone is cooled at the lower part of the high temperature zone. There is a problem that the temperature is lowered by being transmitted. If the lower part of the high temperature zone becomes locally low in this way, some of the products that are desirably displayed in the high temperature zone will be extremely cooled, resulting in damage to the products and the like. It is not preferable.

  In view of the above circumstances, an object of the present invention is to provide a showcase that can suppress a lower temperature of an upper region of an intermediate duct in a storage room from locally becoming low temperature.

  In order to achieve the above object, a showcase according to the present invention includes a storage chamber formed inside a case body and having a plurality of holes formed in a back panel constituting the back surface, and the case body. An air curtain is provided on the front surface of the storage chamber by being provided by being separated from the storage chamber, and the sucked internal air of the storage chamber is cooled by a cooling means provided therein and blown out to the storage chamber. The first air air passage is formed, and the case body is provided in a manner that is partly shared with the first air air passage while being partitioned from the storage chamber inside the case body, and is sucked in the internal air of the storage chamber Is blown into the storage chamber, so that a second air air passage in which an air curtain is formed on the front surface of the storage chamber, and a hole formed in the back panel in a manner of blocking the first air air passage. Through the storage chamber In the case where it is detachably provided and is provided in the storage chamber, the air cooled by the cooling means is introduced from the inlet provided in the rear end and blown out from the intermediate outlet provided in the front end. Driving in a showcase having an intermediate duct having an air curtain formed in front of the lower area of the storage room, wherein the upper area and the lower area of the intermediate duct are different temperature ranges in the storage room. And heating means for heating a part of the air passing through the second air air passage, and a part of the air heated by the heating means by driving is blocked by the intermediate duct in the first air air passage. And a sending means for sending out toward the intermediate duct in such a manner that it passes through the downstream side of the part.

  Further, the present invention is the above showcase, wherein the sending means does not obstruct the passage of air in the first air passage and the second air passage when the intermediate duct is detached from the storage chamber. The driving is intermittently or continuously at a predetermined time.

  According to the present invention, the heating means heats a part of the air passing through the second air air passage by driving, and the sending means drives a part of the air heated by the heating means by driving. Since it sends out toward the intermediate duct in such a manner that it passes through the downstream side of the portion blocked by the intermediate duct in the first air air passage, the sent air is blown out from the hole of the back panel to the storage chamber. Heat can be exchanged between the heat of the air and the cold from the lower area of the intermediate duct, and the lower part of the upper area of the intermediate duct in the storage room can be prevented from becoming locally low in temperature. There is an effect.

FIG. 1 is a cross-sectional side view of a showcase according to an embodiment of the present invention. FIG. 2 is a cross-sectional side view of the state where the intermediate duct shown in FIG. 1 is detached.

  Hereinafter, preferred embodiments of a showcase according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a cross-sectional side view of a showcase according to an embodiment of the present invention. The showcase illustrated here includes a case body 10.

  The case main body 10 is a substantially rectangular heat insulating casing having an opening (hereinafter also referred to as a front opening) 11 formed on the front surface. A housing chamber 12 is formed inside the case main body 10 and an air circulation means 20 is provided. It has been.

  The storage chamber 12 is a chamber formed so as to face the front opening 11, and a plurality of (six in the illustrated example) product display shelves 13 are arranged in a plurality of stages along the vertical direction. The merchandise display shelf 13 is used for placing and displaying merchandise.

  The air circulation means 20 includes an air passage 30 and a circulation fan 40. The air passage 30 is a passage of air from the suction port 14 to the blowout port 15. Here, the suction port 14 is an opening for sucking air inside the storage chamber 12, and has a long shape provided so as to extend along the left-right direction. The suction port 14 is provided at the lower front edge of the storage chamber 12, that is, at the lower portion near the front opening 11 of the case body 10.

  The air outlet 15 is an opening for blowing air into the storage chamber 12. The air outlet 15 is provided so as to extend in the left-right direction, and is provided at the upper front edge of the storage chamber 12, that is, at the upper portion in the vicinity of the front opening 11 of the case body 10.

  Such an air passage 30 is outside the storage chamber 12 and below the lower duct 31, outside the storage chamber 12 and on the back side of the rear duct 32, and outside the storage chamber 12. The upper duct 33 located above is connected to each other. The back duct 32 is divided into two, and an outer passage 32a and an inner passage 32b are provided. The inward passage 32 b is partitioned from the storage chamber 12 by a back panel 16 that constitutes the back surface of the storage chamber 12. The rear panel 16 is formed with a plurality of hole portions 17 such as a mounting hole 17a for mounting an intermediate duct 50 to be described later and a vent hole 17b for ventilating between the storage chamber 12 and the inner passage 32b. ing.

  The circulation fan 40 circulates air and is provided at a predetermined portion of the lower duct 31. In the present embodiment, the circulation fan 40 is provided at a predetermined portion of the lower duct 31. However, in the present invention, the arrangement position of the circulation fan 40 is not particularly limited, and the circulation fan 40 described later is not limited. It may be provided anywhere as long as the function can be exhibited.

  An evaporator (cooling means) 41 is provided in the inner passage 32 b of the rear duct 32. The evaporator 41 is connected to a compressor, a condenser, and an expansion mechanism (not shown) through a refrigerant pipe and constitutes a refrigeration cycle for circulating the refrigerant. The compressor compresses the refrigerant, and the condenser condenses the refrigerant compressed by the compressor. The expansion mechanism adiabatically expands the refrigerant condensed in the condenser to a low temperature and low pressure state, and forms an air curtain near the front opening 11 of the storage chamber 12.

  Such an air circulation means 20 sucks air inside the storage chamber 12 through the suction port 14 when the circulation fan 40 is driven, and sends out the sucked air to the blowout port 15 in a mode of passing through the air passage 30. Air is circulated between the inside and the outside of the storage chamber 12 by blowing air into the storage chamber 12 through the air outlet 15.

  The evaporator 41 exchanges heat between the air that passes through the inner passage 32b from the lower side to the upper side when the circulation fan 40 is driven and the refrigerant that has been brought into a low-temperature and low-pressure state by the expansion mechanism. Is for cooling the air passing through the inner passage 32b by evaporating the low-temperature and low-pressure refrigerant. The refrigerant evaporated in the evaporator 41 is sucked into the compressor and circulates in the refrigeration cycle.

  In such a showcase, an intermediate duct 50, a heater (heating means) 60, and a sending fan (sending means) 70 are provided.

  The intermediate duct 50 has a substantially flat plate shape as a whole. This intermediate duct 50 is provided in the storage chamber 12 in such a manner that the rear end portion 51 penetrates the mounting hole 17a of the rear panel 16 and blocks the inner passage 32b. Product display shelves 13 (hereinafter also referred to as target product display shelves 13). The intermediate duct 50 is detachable from the storage chamber 12.

  The intermediate duct 50 is provided with a wind tunnel 52 therein. The wind tunnel 52 extends along the front-rear direction, and communicates with an inlet 51 a provided at the rear end 51 and an intermediate outlet 53 a provided at the front end 53. The introduction port 51a is open downward and is for introducing air passing through the inner passage 32b. The intermediate air outlet 53 a is opened toward the front side obliquely downward, and is for blowing out air passing through the wind tunnel 52. The front end portion 53 of the intermediate duct 50 is located on the rear side of the front end portion of the target product display shelf 13.

  The heater 60 is disposed at the upper end portion of the outer passage 32a, that is, the most downstream side of the air flow in the outer passage 32a. The heater 60 is driven by a drive command given from a control unit (not shown) and is energized by driving to heat a part of the air surrounding itself, that is, a part of the air passing through the outer passage 32a. To do.

  The delivery fan 70 is disposed at an upper portion of the rear duct 32 that is a junction of the outer passage 32 a and the inner passage 32 b, that is, a communication portion between the rear duct 32 and the upper duct 33. The delivery fan 70 is driven by a drive command given from the control unit, and drives part of the air that has passed through the outer passage 32a into the inner passage 32b. More specifically, the delivery fan 70 passes the part of the air that has passed through the outer passage 32a through the upper side (downstream side) of the portion of the inner passage 32b that is blocked by the intermediate duct 50. It sends out toward the intermediate duct 50.

  In the showcase having the above-described configuration, the air inside the storage chamber 12 circulates as follows when the compressor is driven and the circulation fan 40 is driven.

  The air inside the storage chamber 12 sucked into the lower duct 31 of the air passage 30 through the suction port 14 passes through the lower duct 31, and then partially passes through the outer passage 32a, and the rest passes through the inner passage 32b. Pass through.

  The air passing through the outer passage 32 a flows through the upper duct 33 to the blowout port 15, and then blown out into the storage chamber 12 through the blowout port 15, and is sucked into the air passage 30 through the suction port 14 again. The inside and outside of the storage chamber 12 are circulated. Thereby, an air curtain is formed on the front surface of the storage chamber 12.

  On the other hand, the air passing through the inner passage 32 b is cooled by the evaporator 41. The air cooled by the evaporator 41 is introduced into the wind tunnel 52 through the inlet 51 a, passes through the wind tunnel 52, is blown out through the intermediate outlet 53 a, and is sucked into the air passage 30 through the inlet 14 again, thereby being stored. It circulates inside and outside the chamber 12. As a result, an air curtain made of air cooled by the evaporator 41 is formed on the front surface of the storage chamber 12 below the intermediate duct 50.

  By circulating the air inside the storage chamber 12 in this way, an air curtain is formed on the front surface of the storage chamber 12 by the air blown from the outlet 15, so that the outside air is introduced into the storage chamber 12 through the front opening 11. Can be prevented from entering.

  Further, since an air curtain is formed in front of the lower area of the intermediate duct 50 by the air (cold air) blown out from the intermediate outlet 53a, the lower area of the intermediate duct 50 in the storage chamber 12 is defined as the upper area of the intermediate duct 50. Than can be cooled. Thereby, the upper region and the lower region of the intermediate duct 50 in the storage chamber 12 can be set to different temperature zones, and the products in the storage chamber 12 can be held at two temperatures.

  In the showcase, part of the air that has passed through the outer passage 32a is heated by the heater 60 and heated by the heater 60 when the heater 60 and the delivery fan 70 are driven by a drive command from the control unit. A part of the air thus made enters the inner passage 32b by the delivery fan 70. The air that has entered the inward passage 32b passes downward toward a portion that is blocked by the intermediate duct 50 and abuts against the rear end portion 51 of the intermediate duct 50, so that it is formed on the rear panel 16 thereafter. The air is blown into the storage chamber 12 through the hole 17.

  As described above, in the showcase according to the present embodiment, the lower duct 31, the inner passage 32 b of the rear duct 32, and the upper duct 33 are provided inside the case body 10 and separated from the storage chamber 12. A first air air passage that forms an air curtain on the front surface of the storage chamber 12 is formed by cooling the sucked internal air of the storage chamber 12 by a cooling means disposed therein and blowing it out to the storage chamber 12. ing. Further, the lower duct 31, the outer passage 32a of the rear duct 32, and the upper duct 33 are provided inside the case body 10 in a manner that is partly shared with the first air air passage while being partitioned from the storage chamber 12. By blowing out the internal air of the storage chamber 12 to the storage chamber 12, a second air air passage that forms an air curtain on the front surface of the storage chamber 12 is configured.

  Then, according to the showcase of the present embodiment, a part of the air that has passed through the outer passage 32a is heated by driving the heater 60, and heated by the heater 60 by driving the delivery fan 70. Since a part of the air is sent toward the intermediate duct 50 in such a manner that it passes through the downstream side of the portion blocked by the intermediate duct 50 in the inner passage 32 b, the sent air is sent to the hole 17 of the back panel 16. By being blown out to the storage chamber 12, the heat of the air can be exchanged with the cold heat from the lower area of the intermediate duct 50, and the lower portion of the upper area of the intermediate duct 50 in the storage chamber 12 is locally It can suppress becoming low temperature.

  According to the showcase, the heater 60 is provided at the upper end portion of the outer passage 32a (the portion of the outer passage 32a that is the most downstream side of the air flow), and the delivery fan 70 is connected to the outer passage 32a. Since it is provided at the upper part of the rear duct 32 that becomes a junction with the inner passage 32b, the air heated by the heater 60 is inward regardless of whether the intermediate duct 50 is provided at the lower part of any product display shelf 13. It can send out toward the rear end 51 of the intermediate duct 50 in the passage 32b.

  By the way, in the showcase, as shown in FIG. 2, the intermediate duct 50 is pulled out forward to be detached from the storage chamber 12, and the compressor and the circulation fan 40 are driven to drive the interior of the storage chamber 12. The air circulates as follows. It is assumed that the heater 60 has stopped driving.

  The air inside the storage chamber 12 sucked into the lower duct 31 of the air passage 30 through the suction port 14 passes through the lower duct 31, and then partially passes through the outer passage 32a, and the rest passes through the inner passage 32b. Pass through.

  The air passing through the outer passage 32 a flows through the upper duct 33 to the blowout port 15, and then blown out into the storage chamber 12 through the blowout port 15, and is sucked into the air passage 30 through the suction port 14 again. The inside and outside of the storage chamber 12 are circulated. Thereby, an air curtain is formed on the front surface of the storage chamber 12.

  On the other hand, the air passing through the inner passage 32 b is cooled by the evaporator 41. The air cooled by the evaporator 41 flows through the upper duct 33 to the blowout port 15, and then blown out into the storage chamber 12 through the blowout port 15 and is sucked into the air passage 30 through the suction port 14 again. The inside and outside of the storage chamber 12 are circulated. Thereby, an air curtain is formed on the front surface of the storage chamber 12.

  By circulating the air inside the storage chamber 12 in this way, an air curtain is formed on the front surface of the storage chamber 12 by the air blown from the outlet 15, so that the outside air is introduced into the storage chamber 12 through the front opening 11. Can be prevented from entering, and the product in the storage chamber 12 can be cooled. Thereby, the inside of the storage chamber 12 can be made into one temperature range, and the goods in the storage chamber 12 can be kept at one temperature.

  In such a showcase, when the intermediate duct 50 is detached from the storage chamber 12 and the inside of the storage chamber 12 is set to one temperature zone, the following may be performed. That is, for example, when performing a defrosting operation or the like for removing frost attached to the evaporator 41, the air is sent at a predetermined time in a manner that does not inhibit the passage of air in the outer passage 32a and the inner passage 32b. It is preferable to drive the fan 70 intermittently.

  According to this, even if the inside of the storage chamber 12 is not set to a different temperature zone for a long period of time, it is possible to prevent the delivery fan 70 from being maintained in a drive stopped state for a long period of time. Thereby, it can suppress that the oil incorporated in order to drive the sending fan 70 solidifies, and it can avoid causing the malfunction of the sending fan 70.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to this, and various modifications can be made.

  In the embodiment described above, the outer passage 32a of the rear duct 32 is located on the rear side of the inner passage 32b. However, in the present invention, the outer passage is provided on the left and right sides of the inner passage. It may be.

  In the above-described embodiment, when the intermediate duct 50 is detached from the storage chamber 12 and the inside of the storage chamber 12 is set to one temperature zone, the delivery fan 70 is intermittently driven during a predetermined time during the defrosting operation. However, in the present invention, the delivery means may be continuously driven, and is not limited to a predetermined time during the frosting operation, and the delivery means is used when the inside of the storage chamber is set to one temperature zone. May be continuously driven. Also by these, it is possible to avoid a malfunction of the sending means.

  In the above-described embodiment, the number of delivery fans 70 is not clearly shown, but in the present invention, a plurality (for example, five) may be provided at predetermined intervals along the left-right direction. Of these five, for example, two are arranged so that the blowing direction is directed rearward as in the embodiment, and when driven, the air that has passed through the outer passage 32a enters the inner passage 32b. Is. The remaining three, for example, are arranged so that the blowing direction is forward and different from the above two, and when driven, the air that has passed through the outer passage 32a is preferably made to enter the upper duct 33. .

  According to such a configuration, when the intermediate duct 50 is detached from the storage chamber 12 and the inside of the storage chamber 12 is adjusted to one temperature zone, three of the delivery fans 70 whose blowing direction is directed forward are arranged. By driving, the air that has passed through the outer passage 32a by the driving of the circulation fan 40 enters the upper duct 33 and is blown out from the blowout port 15 to the storage chamber 12, thereby functioning as an auxiliary to the circulation fan 40. Can play.

  On the other hand, when the intermediate duct 50 is installed and the storage chamber 12 is adjusted to two different temperature zones in the same manner as in the above-described embodiment, two of the delivery fans 70 whose blowing directions are directed backward are driven. As a result, the air that has passed through the outer passage 32a by driving the circulation fan 40 can enter the inner passage 32b.

DESCRIPTION OF SYMBOLS 10 Case main body 11 Front opening 12 Storage chamber 13 Commodity display shelf 30 Air passage 31 Lower duct 32 Rear duct 32a Outer passage 32b Inner passage 33 Upper duct 40 Circulation fan 41 Evaporator 50 Intermediate duct 60 Heater 70 Sending fan

Claims (2)

A storage chamber formed inside the case body and having a plurality of holes formed in the back panel constituting the back surface;
The case body is provided inside the case body so as to be partitioned from the storage chamber, and the suctioned internal air of the storage chamber is cooled by a cooling means disposed therein and blown out into the storage chamber, whereby the storage A first air air passage in which an air curtain is formed in front of the chamber;
The inside of the case body is provided in a manner that is partly shared with the first air air passage while being partitioned from the storage chamber, and the sucked internal air of the storage chamber is blown out into the storage chamber. A second air air passage in which an air curtain is formed on the front surface of the storage chamber;
In a manner that blocks the first air air passage, it is detachably provided in the storage chamber through a hole formed in the back panel, and is cooled by the cooling means when provided in the storage chamber. An intermediate duct in which an air curtain is formed on the front surface of the lower area of the lower area by introducing air from an inlet provided at the rear end and blown out from an intermediate outlet provided at the front end. ,
In the showcase in which the upper area and the lower area of the intermediate duct in the storage room have different temperature ranges,
Heating means for heating a part of the air passing through the second air air passage by driving;
Sending means for sending a part of the air heated by the heating means by driving toward the intermediate duct in such a manner as to pass the downstream side of the portion of the first air air passage blocked by the intermediate duct. A showcase characterized by comprising and.   When the intermediate duct is detached from the storage chamber, the delivery means is intermittently at a predetermined time in a mode that does not obstruct the passage of air in the first air passage and the second air passage. The showcase according to claim 1, wherein the showcase is continuously driven.

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