JP2010249419A - Open showcase and method of operating the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an open showcase and its operating method capable of saving energy by optimizing a defrosting method of each of coolers in a plurality of cooling units, and reducing manufacturing costs. <P>SOLUTION: The plurality of cooling units respectively having the coolers 10, blowers 11 and controllers are disposed in the longitudinal direction of this oven showcase 1, a display chamber is formed in such a state that it can be divided into a plurality of display sections 9, 9 corresponding to each of the cooling units, and the coolers and the blowers are respectively controlled by the controllers of the cooling units, so that the plurality of display sections can be respectively set to different cooling temperatures. Defrosting of the coolers can be selected from heater defrosting and off-cycle defrosting according to the cooling temperatures set to the display sections. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an open showcase and a method of operating the same, and more specifically, an open showcase that can be used with a plurality of compartments in the longitudinal direction in a display room in which products are displayed and sold, and each compartment can be used at a different temperature setting. It relates to the driving method.

  As an open showcase, the inside of the main body is divided into a plurality of longitudinal directions, and a cooling unit having a cooler, a blower, and a controller is arranged for each section, and each section can be cooled to a different temperature by each cooling unit. An open showcase formed as described above is known (see, for example, Patent Document 1).

Japanese Patent Publication No. 3-78553

  However, in the conventional open showcase with multiple longitudinal directions, sufficient consideration has not been given to the defrosting method of the cooler, the energy consumption is large, and it is manufactured compared to the general open showcase. There was a problem such as high cost.

  Therefore, the present invention provides an open showcase that can save energy by optimizing the defrosting method of each cooler in a plurality of cooling units, and can reduce the manufacturing cost, and an operating method thereof. It is an object.

  In order to achieve the above object, an open showcase of the present invention forms a display chamber whose front surface is opened in a main body constituted by a heat insulating wall, and includes a lower portion of a bottom plate of the display chamber, a rear portion of a rear plate, and a top plate. It passes through the duct provided in the upper part, is blown downward from the outlet provided in the upper front end of the display room, is sucked into the suction port provided in the lower front end of the display room, and circulates in the lower part of the display room A plurality of cooling units having a cooler, a blower and a controller are arranged in the longitudinal direction of the open showcase that cools the display room by covering the opening of the display room with a cool air curtain, and each cooling unit is associated with each cooling unit. The display chamber is formed in a longitudinal direction so that the display chamber can be divided into a plurality of display sections, and each cooler and each blower are controlled by a controller of each cooling unit. In the open showcase in which the compartments can be set to different cooling temperatures, the controller selects either defrosting of the cooler or off-cycle defrosting according to the set cooling temperature. It is characterized by that.

  Furthermore, the open showcase of the present invention is detachably provided with a partition plate that divides the display chamber in the longitudinal direction, and at the rear part of the partition plate inserted through a vertical slit provided in the back plate, The duct division part which divides | segments the duct provided in the rear part of the backplate in the longitudinal direction is provided.

  Also, each blower of each cooling unit is disposed in an integrated plenum chamber having the same planar shape in the longitudinal direction of the open showcase, and the longitudinal interior of the integral plenum chamber is located on the back surface of the main body. It is preferable to be partitioned by a partition plate provided corresponding to the position of the provided shelf column, and further, the duct is divided into an inner layer duct and an outer layer duct provided outside the inner layer duct. Forming and disposing the cooler and the blower in the inner layer duct, providing an outer layer duct blower different from the blower in the outer layer duct, and arranging the blower for the outer layer duct. It is preferable to adopt a configuration in which the plenum chamber is disposed in a compartment formed independently of the compartment of the plenum chamber.

  The operating method of the open showcase of the present invention is the operating method of the open showcase having the above-described configuration, and when the cooling temperature of the display section is 0 ° C. or lower, the heater defrosting that operates the heater attached to the cooler And when the cooling temperature of the display section exceeds 0 ° C., off-cycle defrosting is performed to stop introduction of the refrigerant into the cooler, and the display section having the cooling temperature exceeding 0 ° C. is continuous. When doing so, it is preferable to perform off-cycle defrosting by shifting the time for each display section.

  Furthermore, it is preferable that a DC fan motor is used as the blower and that the rotational speed of the DC fan motor is adjusted according to the operating conditions of the cooling unit. When pulled out to the side, it is preferable to stop the operation of the cooling unit that cools the section including the commodity display shelf deck portion.

  According to the present invention, since the defrosting method is selected according to the cooling temperature (set temperature) set for each display section, the defrosting of the cooler can be reliably performed in a short time, and energy saving can be achieved. Further, by performing the division in the duct at the duct division portion provided at the rear portion of the partition plate, it is not necessary to previously provide the partition member in the duct, so that the manufacturing cost can be reduced. Furthermore, when the set temperatures of adjacent display sections are the same or the temperature difference is small, it is not necessary to divide the inside of the duct, so the partition plate can be removed and a plurality of display sections can be used in a continuous state. it can. In addition, by providing a partition in the plenum chamber in which the blower is disposed only at the minimum necessary position, it is possible to reduce the manufacturing cost while maintaining the cooling performance. Further, by dividing the duct into the inside and outside and blowing the air to the outside duct with the outer layer duct blower, the occurrence of condensation can be prevented even when the temperature difference from the adjacent display section is large.

  As the selection of the defrosting method, heater defrosting is performed at 0 ° C or less with 0 ° C as a boundary, and off-cycle defrosting is performed when the temperature exceeds 0 ° C, so that the defrosting of the cooler can be quickly performed while saving energy. It can be done reliably. In addition, when the display section where the cooling temperature exceeds 0 ° C. is continuous, the defrosting of the cooler can be effectively performed by shifting the time and performing the off-cycle defrosting. Temperature change can be suppressed. Furthermore, by adjusting the rotational speed using a DC fan motor, air can be blown according to the situation, so that the cooling efficiency can be improved. Moreover, the temperature rise in the cooling compartment can be suppressed by stopping the cooling unit when the lowermost product display shelf deck portion is pulled out to the front side of the main body.

It is a sectional side view showing an example of one form of the open showcase of the present invention. It is a cross-sectional top view of the principal part of an open showcase similarly. It is a cross-sectional top view of the other principal part of an open showcase similarly. Similarly, it is a front view of an open showcase.

  The open showcase 1 shown in the present embodiment forms a multistage display chamber 4 having a front surface opened in a main body 3 constituted by a heat insulating wall 2, a lower portion of a bottom plate 3 a of the main body 3, and a rear portion of the back plate 3 b In addition, an outer layer duct 5 and an inner layer duct 6 are provided in a two-layer structure on the top surface plate 3c, and a plurality of cooling units 7, 7 are arranged in the longitudinal direction of the main body 3, and the display chamber 4 is associated with each cooling unit 7. The partition plate 8 is attached to the display chamber 4 so that the longitudinal direction of the display chamber 4 can be divided into a plurality of display sections 9 and 9. Inside the outer layer duct 5 and the inner layer duct 6, by providing a support for joining shelf columns and inner and outer plate-like members at the boundary between adjacent display sections 9, 9 without providing a conventional partition. It is a simple partition.

  In each inner layer duct 6, a cooler 10 and an inner layer blower 11 constituting the cooling unit 7 are provided, and a cooling operation and a defrosting operation are performed by a controller 12 at a temperature set in the controller 12. Each display section 9 is formed so that it can be cooled. The outer layer duct 5 is provided with an outer layer blower 13.

  The inner layer blower 11 and the outer layer blower 13 are respectively provided in an integrated plenum chamber 14 provided at the lower back of the main body, and the inner layer blowers 11, 11 are arranged on both sides of one outer layer blower 13. . The plenum chamber 14 is formed in the same plane shape in the longitudinal direction of the main body, and the inside of the plenum chamber 14 is provided corresponding to the position of the shelf column 3d provided at the center of the back surface of the main body 3. It is divided into left and right by one partition plate 14a, and is in a state in which the inner layer blowers 11 and 11 are adjacent to each other. The outer layer blower 13 is disposed between the two inner layer blowers 11, 11 via the second partition plate 14 b that partitions the plenum chamber 14, and is arranged in the outer layer duct 5 in a state independent of the inner layer blower 11. It is formed so that it can blow.

  The upper front end portion of the main body 3 is provided with an outer layer outlet 15 on the outer side and an inner layer outlet 16 on the inner side over the entire longitudinal direction of the case. The lower front end portion of the main body 3 has an outer layer on the outer side. A suction port 17 and an inner layer suction port 18 are provided on the inner side of the entire case in the longitudinal direction. The outer layer airflow blown by the outer layer blower 13 is rectified and blown downward from the outer layer outlet 15 through the upper part of the outer layer duct 5, and sucked into the lower part of the outer layer duct 5 from the outer layer inlet 17 and circulates. The inner layer air flow blown by the inner layer blower 11 is cooled by the cooler 10, and then rectified and blown downward from the inner layer outlet 16 through the upper portion of the inner layer duct 6, and from the inner layer inlet 18. It is sucked into the lower part of the duct 6 and circulates.

  The outer layer airflow blown out from the outer layer outlet 15 and the inner layer airflow blown out from the inner layer outlet 16 form an air curtain that doublely covers the opening of the display chamber 4 and cool the inside of the display chamber 4. I have to. The outer layer airflow that forms an outer layer air curtain by circulating through the outer layer duct 5, the outer layer outlet 15, and the outer layer suction port 17 acts as a heat insulating layer for the inner layer airflow, and the inner layer airflow in the display chamber 4 ( The cooling effect in the display room 4 by the inner layer airflow is improved by protecting the cold airflow) and suppressing the diffusion of the cold air to the outside air and the rise in the product temperature.

  In the open showcase 1 formed in this way, the defrosting operation of each cooler 10 is selected according to the cooling temperature (set temperature) of each display section 9 set in each controller 12, and the set temperature is low. Sometimes it is set to perform heater defrosting that activates the heaters attached to each cooler 10, and when the set temperature is high, it is set to perform off-cycle defrosting that stops the introduction of refrigerant to each cooler 10. ing. For example, by performing the heater defrosting when the set temperature is 0 ° C. or less, the frost adhering to the cooler 10 can be reliably removed in a short time, and the defrosting time can be shortened to reduce the inside of the display section 9. Temperature rise can be kept small. Moreover, the energy which operates a heater can be reduced by performing off-cycle defrost when the preset temperature of the display section 9 exceeds 0 degreeC.

  Further, a DC fan motor is used as the inner layer blower 11, and the air volume at the time of defrosting is appropriately set according to the difference in set temperature and defrosting operation, for example, in the case of heater defrosting, the speed is reduced. Thus, the defrosting of the cooler 10 can be performed more efficiently, and the temperature rise in the display section 9 can be further suppressed. Furthermore, when a DC fan motor is used as the blower 11 for the inner layer, efficient cooling is performed while reducing energy consumption by appropriately setting the air volume according to conditions such as the pull-down of the cooling start, season, day and night. You can drive.

  The partition plate 8 is mounted when the interior of the display chamber 4 is divided into a plurality of display compartments 9 as necessary. The partition plate 8 is provided on the rear plate 3b of the main body 3 on the rear side of the partition plate 8. A duct dividing portion 8a to be inserted into the vertical slit 3e is provided. That is, when the partition plate 8 is mounted in the display chamber 4, the duct dividing portion 8 a protrudes into the inner layer duct 6 on the back surface of the main body, divides the inner layer duct 6 into right and left, and cool air that has passed through each cooler 10. It acts as a partition that guides upward. Therefore, when there is a large temperature difference between the set temperatures of the adjacent display sections 9, the partition plate 8 is attached to suppress the mixing of cold air having a large temperature difference within each display section 9 to a predetermined temperature. Can be reliably cooled. Further, by setting the front end portion of the partition plate 8 at a position where the inner layer air curtain blown from the inner layer outlet 16 can be partitioned for each display section 9, mixing of cold air on the opening side can be suppressed. .

  Further, in the plenum chamber 14, a first partition plate 14 a is provided in advance at a portion where the inner layer blower 11 is adjacent to the plenum chamber 14 at the time of manufacture. Since the inner layer duct 6 is divided by mounting the inner layer duct 6 and the outer layer duct 5, the manufacturing cost is lower than that of the conventional method in which a partition corresponding to the divided portion of the display section 9 is provided in advance. Reduction is also possible.

  In addition, when the set temperatures of the adjacent display sections 9 are the same, or when there is a temperature difference that does not cause any problem even if the cold air is mixed somewhat, for example, up to about 5 ° C., the display is performed by removing the partition plate 8. The continuity of the product is not impaired, and the aesthetic appearance is also favorable. Further, by providing a simple partition between the display sections 9 and 9 as necessary, the movement of cool air between the adjacent display sections 9 can be suppressed. Furthermore, when the temperature difference between the adjacent display sections 9 and 9 is small, it is possible to cope with it only by adjusting the set temperature etc. of the controller 12, and it is possible to show the part where the product is displayed widely. Is not shredded and the appearance of the product can be improved.

  Therefore, it is possible to deal with a wide range of usage changes according to the product configuration displayed in each display section 9. For example, when the product composition to be displayed changes not only at special times such as seasons and year-ends, but also on weekdays and holidays, the position of the partition plate 8 is set according to the product configuration and the setting of each display section 9 By adjusting the temperature according to the displayed product, it is possible to easily cope with it and create a changing sales floor.

  Furthermore, since it is possible to cope with the case where the temperature difference between the adjacent display sections 9 and 9 is large, for example, the cooling operation of the section adjacent to the meat display section set to a low temperature is stopped to be a non-cooling zone. Curry roux and Chinese seasonings in the glossary zone can also be displayed, improving convenience for shoppers and contributing to sales promotion. Furthermore, by setting in this way, it is possible to reduce the electricity cost of the refrigerator, and to reduce product loss by increasing the sales volume.

  Even when the cooling operation is stopped and the inner layer blower 11 in the non-cooling zone is stopped in this way, the outer layer blower 13 is operated independently, and air is circulated in the outer layer duct 5. Condensation can be prevented from occurring in the cooling zone. Further, since the conventional duct is not provided in the duct of the ceiling portion, only a simple partition by the support is provided, and no condensation occurs in this portion.

  Furthermore, when the display sections 9 having a set temperature exceeding 0 ° C. continue, the defrosting of the coolers 10 in each display section 9 may be performed in a plurality of sections at once, but there is a time difference for each display section 9. It can set so that it may provide and defrost each cooler 10 in order. In this way, by providing a time difference for each display section and performing defrosting in order, the defrosting time per time can be shortened by increasing the number of defrosting, and the temperature rise in the display section can be reduced. Suppressed defrosting operation can be performed. Thereby, the temperature change of the displayed goods can be reduced and the cooling operation excellent in freshness management can be performed. Further, when the lowermost product display shelf is formed in a slide structure that can be pulled out to the front side of the main body, the compartment including the product display shelf deck portion when the product display shelf deck portion is pulled out to the front side of the main body By stopping the operation of the cooling unit that cools the battery, it is possible to prevent the cooling operation from being adversely affected.

DESCRIPTION OF SYMBOLS 1 Open showcase 2 Heat insulation wall 3 Main body 3a Bottom plate 3b Back plate 3c Top plate 3d Shelf column 3e Slit 4 Display chamber 5 Outer layer duct 6 Inner layer duct 7 Cooling unit 8 Partition plate 8a Duct division part 9 Display section 10 Cooler 11 Inner layer Blower 12 Controller 13 Blower 14 Plenum chamber 14a First divider 14b Second divider 15 Outer outlet 16 Inner outlet 17 Outer inlet 18 Inner inlet

Claims (8)

A display chamber having a front opening is formed in a main body constituted by a heat insulating wall, and passes through a duct provided in a lower portion of a bottom plate of the display chamber, a rear portion of the back plate, and an upper portion of the top plate, and the upper front end of the display chamber Displayed by covering the opening of the display chamber with a cool air curtain that is blown downward from the outlet provided in the display chamber, sucked into a suction port provided at the lower front end of the display chamber, and circulated to the lower portion of the display chamber A plurality of cooling units having a cooler, a blower, and a controller are arranged in the longitudinal direction of the open showcase that cools the room, and the display chamber can be partitioned into a plurality of display sections in the longitudinal direction corresponding to each cooling unit. In addition, an open showcase in which the plurality of display sections can be set to different cooling temperatures by controlling each cooler and each blower by a controller of each cooling unit. In,
An open showcase in which the controller selects either defrosting of the heater or off-cycle defrosting according to the set cooling temperature.   A partition plate that divides the display chamber in the longitudinal direction is detachably provided, and a duct provided at a rear portion of the back plate is provided at a rear portion of the partition plate inserted into a vertical slit provided in the back plate. The open showcase according to claim 1, further comprising a duct dividing portion that is divided in a longitudinal direction.   Each blower of each cooling unit is disposed in an integral plenum chamber having the same plane shape in the longitudinal direction of the open showcase, and the longitudinal interior of the integral plenum chamber is provided on the back surface of the main body. The open showcase according to claim 1 or 2, wherein the open showcase is partitioned by a partition plate provided corresponding to the position of the shelf column.   The duct is divided and formed into an inner layer duct and an outer layer duct provided outside the inner layer duct, the cooler and the blower are disposed in the inner layer duct, and the blower is in the outer layer duct. The blower for another outer layer duct is provided, and the blower for the outer layer duct is disposed in a section formed independently of the section of the plenum chamber in which the blower is disposed. Open showcase.   The operation method of the open showcase according to any one of claims 1 to 4, wherein when the cooling temperature of the display section is 0 ° C or lower, heater defrosting is performed to operate a heater attached to the cooler, An operating method of an open showcase, characterized in that when the cooling temperature of the display section exceeds 0 ° C, off-cycle defrosting is performed to stop introduction of the refrigerant into the cooler.   6. The open showcase operating method according to claim 5, wherein when the display section having a cooling temperature exceeding 0 ° C. is continuous, off-cycle defrosting is performed by shifting the time for each display section.   7. The open showcase operating method according to claim 5, wherein a DC fan motor is used as the blower, and a rotational speed of the DC fan motor is adjusted according to an operating condition of the cooling unit.   The operation of the cooling unit that cools the compartment including the product display shelf deck portion is stopped when the product display shelf deck portion at the lowest stage of the display room is pulled out to the front side of the main body. The operating method of the open showcase of any one of 7.

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