JP2007209513A - Storage apparatus, and temperature control method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a storage apparatus which is compact and can be used for cold storage and also warm storage. <P>SOLUTION: The storage apparatus has: a display chamber 3 where at least a part of its front side is made to be an outlet port 2; a cold/warm air supply unit 4 which is provided with a Peltier element unit 63 and which can supply cold air and warm air for forming an air curtain at the outlet port 2 through a duct 30 arranged at a lower and back sides of the display chamber 3; and a control unit 64 which can select a cold mode which blows upward to the duct 30 from its lower side to generate the cold air to form the air curtain made of a flow downward from an upper side at the outlet port 2 to make the display chamber 3 cold and a warm mode which blows downward to the duct 30 from its lower side to form the air curtain facing upward from a lower side at the outlet port 2 to make the display chamber 3 warm. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a storage device that can be installed on a shelf or the like and can display commodities such as food and beverage cans, and a temperature control method therefor.

  In a store such as a convenience store, products that require refrigeration are usually stored in a storage device (showcase) for refrigeration fixed in the store.

On the other hand, a small storage device such as a desktop type is also known. Patent Document 1 discloses a refrigerated showcase for installation on a tabletop. This refrigerated showcase has a vertically long display box with the upper surface and both left and right sides closed by transparent plates, and both front and rear sides closed by transparent doors. It has become.
JP-A 64-46556

  In a store such as a convenience store, a place where the area where products are displayed occupies a large area is a shelf called a gondola that displays products at room temperature. Therefore, if a refrigerated product can be displayed on a part of a shelf according to conditions such as the season and the flow of customers, variations in the display of the product are further increased than displaying a refrigerated product on a table. However, since the desktop refrigerated showcase described in Patent Document 1 is vertically long, it cannot be installed on a shelf as it is.

  On the other hand, there is a demand to display a refrigerated product together with a refrigerated product or in place of a refrigerated product on a part of the shelf. It is cumbersome and not economical to prepare a shelf-type storage device for warm storage in addition to a shelf-type storage device for refrigeration, and to properly use these as needed.

  A storage device that can be switched between a refrigerated state and a refrigerated state is designed to be compact with a common endothermic and heat generating area, because cold air flows downward and warm air flows upward. The efficiency of either one cannot be improved. In order to appropriately control the flow of the cold air and the warm air, a region for absorbing heat and a region for generating heat are separately arranged, or a duct for cold air and a duct for hot air are individually prepared. However, such a storage device tends to be large and difficult to install on a shelf. In particular, the storage device installed on the shelf can easily show the product stored in the storage device installed on the shelf, as well as other products displayed at room temperature, without making the storage device on the shelf stand out. It is required to be able to take out. For this reason, the space which can be divided for refrigeration and warm storage is small.

  One embodiment of the present invention includes a display chamber in which at least a part of the front is an open outlet, and a Peltier element unit, and an air curtain is provided at the outlet via ducts disposed below and behind the display chamber. A cool and warm air supply unit capable of supplying cool air and hot air to form the air, and generating a cool air by blowing the duct from below to above the duct, and forming an air curtain with a flow directed from above to the outlet A refrigeration mode for refrigeration of the display room, and hot air is generated by blowing air from above to the duct, and an air curtain is formed at the outlet by a flow directed downward from above to make the display room refrigerated. And a control unit capable of selecting a warming mode.

  Another aspect of the present invention is a temperature control method for a storage device, wherein the storage device includes a display chamber in which at least a part of the front is an open outlet, and a Peltier element unit, and is provided below the display chamber. And a cold / hot air supply unit capable of supplying cold air and hot air for forming an air curtain at the outlet through a duct arranged at the rear, and the temperature control method is selected as refrigeration Then, the step of blowing air upward from below to the duct to generate cold air, forming the air curtain by the flow directed downward from above at the outlet, and refrigeration of the display room, and when warming is selected, The duct has a step of generating hot air by blowing from above to below the duct, and forming an air curtain by a flow directed upward from below at the outlet to warm the display chamber.

  The cool air is preferably supplied from the top to the bottom, and the warm air is preferably supplied from the bottom to the top. Therefore, in the present invention, the air blowing direction for forming the air curtain is reversed between refrigeration and warming, and at the same time, the air blowing direction in the duct is reversed, so that the path of cold air during refrigeration and It is trying to reduce the size of the storage device by sharing the hot air path. In addition, the Peltier element unit can switch between heat absorption and heat dissipation by changing the direction of the current, so it can be compact and generate cold and hot air by installing it in a common duct for cold and hot air. Can be supplied.

  That is, in the refrigeration mode (during refrigeration), air flows from below to the duct, which is a common fluid path for cold air and hot air, to generate cold air, and flows from the upper side to the lower side at the outlet of the display room Form an air curtain to cool the display room. On the other hand, in the warm storage mode (during warm storage), hot air is generated by blowing air from above to the duct, which is a common fluid path for cold air and hot air, and from the bottom upward to the display room outlet. An air curtain is formed by the flow of air and the display room is kept warm. Therefore, according to this temperature control method, it is possible to provide a compact storage device that can be refrigerated and warmed.

  The display room has at least one display shelf for displaying commodities such as food and beverage cans. If merchandise is displayed in a single row, the display shelves will only serve as the floor of the display room. If the product is displayed in two or more levels, a display shelf is added on the way from the floor of the display room to the canopy. The at least one display shelf preferably includes an internal duct that communicates the duct with a plurality of pores provided in a surface constituting member of the display shelf. In order to make it easy to take out the product from the outlet, the display shelf is installed at least below the upper end of the outlet. That is, the display shelf is installed below the upper opening of the duct for forming the air curtain. Accordingly, a part of the cold air supplied from the upper side to the lower side in order to form an air curtain at the outlet is sucked from a plurality of pores provided in the surface constituting member of the display shelf, and is passed through the internal duct. Circulate and cool products placed on display shelves more efficiently. Further, a part of the warm air supplied from the lower side to the upper side to form an air curtain at the outlet is blown out from a plurality of pores provided in the surface constituting member of the display shelf, and is arranged on the display shelf. Warm more efficient products.

  In general, the temperature difference between warm air and room temperature required in the refrigeration mode is larger than the temperature difference between cold air and room temperature required in the refrigeration mode. For this reason, it is desirable to change the balance between the air volume of the air curtain and the air volume via the display shelf in the warming mode.

  Accordingly, the damper further has a damper capable of controlling the flow rate passing through the plurality of pores, and in the refrigeration mode (step of refrigeration), the control unit reduces the flow rate passing through the plurality of pores to reduce the flow rate through the plurality of pores. In the storing step), it is preferable to increase the flow rate through the plurality of pores. The duct is preferably provided with a damper capable of controlling the opening degree of the flow path to the lower side of the outlet of the display room. In this case, the control unit opens the damper in the refrigeration mode (refrigeration step). It is preferable to increase the degree and reduce the opening of the damper in the warming mode (step of warming). In the warming mode, it is more efficient to heat the product if it is blown from the display shelf closer to the product, rather than blowing a large amount of hot air that has a temperature difference from the room temperature to the outlet where the user hands. Since the temperature at the outlet does not fluctuate rapidly, the user can easily put his hand. In the refrigeration mode (the refrigeration step), condensation is less likely to occur in the merchandise being displayed when the interior of the display chamber is cooled by the air curtain than when the merchandise is rapidly cooled by sucking a large amount of cold air from the display shelf.

  Since the cold / hot air supply unit includes the Peltier element unit, it is possible to supply cold air and hot air into the display chamber. Generally, the temperature difference between hot air and room temperature is larger than the temperature difference between cold air and room temperature. By placing a heater in the duct, a Peltier element unit that is efficient for both cooling and heating can be obtained. Can be installed in a duct. In the warming mode, a system that heats only with a heater can be used. Further, in the warming mode, in order to blow out the warm air heated by the heater from the display shelf, the heater is preferably arranged at the upper communication portion between the duct and the internal duct of the display shelf.

  A transparent canopy that reaches the upper end of the take-out port from the upper side of the display chamber is provided, and air blowing between the opening of the duct provided above the display chamber and the take-out port can be guided by this canopy.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing the external appearance of the storage device. FIG. 2 is an exploded perspective view showing a schematic configuration of a display shelf included in the storage device. 3 (a) and 3 (b), the storage device is shown in a longitudinal sectional view. This storage device 1 is a storage device of size and weight that can be installed on a shelf of products displayed at room temperature called a gondola at a convenience store, and as a device that refrigerates and stores products such as food and beverage cans It has both the functions of and as a showcase.

  As shown in FIGS. 1, 3 (a), and 3 (b), the storage device 1 includes a horizontally long display chamber 3 that is partially opened in front and serves as a product outlet 2, and a display chamber 3. And a cool / warm air supply unit (hereinafter referred to as a supply unit) 4 disposed at the rear and below the housing 5. The housing 5 has a transparent ceiling (canopy) 5a, transparent side walls 5b and 5c, a rear wall 5d, and a lower wall 5e. Inside the display chamber 3, first and second display shelves 10 and 20 are arranged. The second display shelf 20 also serves as the floor surface of the display chamber 3. Inside the supply unit 4, a duct 30 extending rearward and downward of the display chamber 3 and a Peltier element unit 63 capable of cooling and heating the air inside the duct 30 are arranged.

  The display chamber 3 is surrounded by a transparent canopy 5a and transparent side walls 5b and 5c on the upper side and the side. The lower side and the rear side are in contact with the supply unit 4, and the front (front side) is open. Therefore, the display chamber 3 has a form in which products are displayed inside and the products are easily taken in and out from the front outlet 2. The transparent canopy 5a and the side walls 5b and 5c employ a double acrylic structure wall that is lightweight, strong, and has high heat insulation performance. The transparent canopy 5a is substantially flat at the upper wall 5f, and the front end portion 5g is curved downward to form the upper end of the outlet 2. Therefore, the transparent canopy 5a guides indoor light into the display chamber 3 to make it easy to see the product, and blows air between the opening 31 of the duct 30 provided above the display chamber 3 and the outlet 2. Serves as a guide.

  The duct 30 of the supply unit 4 includes a plurality of first openings 31 arranged at the upper end portion on the rear side of the display chamber 3 and the front end portion of the display shelf 20 below the display chamber 3 that hits the lower end of the outlet 2. And a plurality of second openings 32 arranged at the same position. Further, the duct 30 has a plurality of third openings 33 at a position where the display shelf 10 in the middle part of the rear wall of the display chamber 3 is connected.

  In the vicinity of the first opening 31 of the duct 30, first and second cross flow fans 34 and 35 whose air blowing directions are opposite to each other are provided. A Peltier element unit 63 having a Peltier element 61 is attached below the portion where the duct 30 extends vertically along the rear surface of the display chamber 3, and the first fin 66 of the Peltier element unit 63 is placed in the duct 30. Stick out. A heater 62 is disposed inside the duct 30 above the duct 30. Heat insulating materials 71 and 72 are attached to the outside of the duct 30 (the rear side of the duct 30 and the lower side of the duct 30), and the exhaust heat path extending vertically with the heat insulating material 71 sandwiched behind the housing 5. 79 is configured. A second fin 67 of the Peltier element unit 63 protrudes from the heat exhaust path 79, and a propeller fan 68 is disposed behind the fin 67. Further, a substrate 65 including a control unit 64 is disposed above the exhaust heat path 79, and the entire supply unit 4 including the fans 34 and 35, the Peltier element unit 63, the heater 62, and the exhaust heat fan 68. Can be controlled by the control unit 64.

  The control unit 64 can select a refrigeration mode or a refrigeration mode. In the refrigeration mode, the first fin 66 inside the duct 30 absorbs heat with respect to the Peltier element unit 63, and the first heat exhaust path 79 has a first heat sink. Electric power is supplied by the flow of current that radiates heat through the two fins. Further, the first cross flow fan 34 is selected to form a flow from the bottom to the top in the duct 30. In the warming mode, electric power is supplied to the Peltier element unit 63 by a current flow in which the first fin 66 inside the duct 30 dissipates heat and the second fin of the heat exhaust path 79 absorbs heat. Electric power is also supplied to the heater 62. Further, the second cross flow fan 35 is selected to form a flow from the top to the bottom in the duct 30. Switching between the refrigerated mode and the warmed mode is possible by providing an operation switch 75 on the rear wall 5d of the housing 5 or the like.

  The supply unit 4 can supply cold air and hot air for forming an air curtain to the outlet 2 via the duct 30. As shown in FIG. 3A, when the refrigeration mode is selected by the operation switch 75, the control unit 64 drives the first crossflow fan 34 to form a flow from below to above in the duct 30. To do. The flow from the lower side to the upper side of the duct 30 is cooled by the Peltier element unit 63 to become cold air, and is blown out from the first opening 31 to the display chamber 3 in the horizontal direction. Since the front end portion 5g of the canopy 5a is curved downward, the cool air flows downward along the front end portion 5g of the canopy 5a. The second opening 32 of the duct 30 arranged on the lower side of the outlet 2 sucks air from the lower side of the outlet 2. As a result, an air curtain is formed by the cold air flowing from the upper side to the lower side at the outlet 2.

  When the warming mode is selected by the operation switch 75, as shown in FIG. 3B, the control unit 64 drives the second cross-flow fan 35 and causes the duct 30 to flow from above to below. Form. The flow from the upper side to the lower side of the duct 30 is heated by the heater 62 and the Peltier element unit 63 to become hot air. This warm air is blown upward in the vertical direction from the second opening 32 to the display chamber 3, and flows into the outlet 2 from below to above. Further, since air is sucked into the duct 30 from the first opening 31 and the front end portion 5g of the canopy 5a is curved downward, the front end portion 5g of the canopy 5a serving as the upper end of the outlet 2 is provided. An upward flow along the line is formed. As a result, an air curtain is formed in the outlet 2 by the warm air flowing upward from below.

  FIG. 2 shows the first display shelf 10 in an exploded perspective view. The first display shelf 10 includes a shelf body 12 having a recess 11 having an opening 11a at the top, and a plurality of SUS shelf boards laid on the shelf body 12 so as to close the opening 11a at the top of the recess 11 13 (only one is shown in FIG. 2). A space surrounded by the shelf main body 12 and the plurality of shelf boards 13 serves as an internal duct 40 and communicates with the plurality of pores 14 provided in each shelf board 13 which is a surface constituting member of the display shelf. The first display shelf 10 is arranged in the middle portion of the display chamber 3 so that the third opening 33 of the duct 30 and the internal duct 40 communicate with each other. The second display shelf 20 that also serves as the bottom plate of the display chamber 3 has substantially the same configuration. However, in the storage device 1, the internal duct 40 is integrated with the duct 30 disposed below the display chamber 3. Yes. It is also possible to separate the internal duct of the second display shelf 20.

  The pores 14 provided in the shelf boards 13 of these display shelves 10 and 20 communicate with the duct 30, and cold air and hot air can be supplied and exhausted through the pores 14. For example, in the refrigeration mode shown in FIG. 3A, the fan 34 and the opening 31 are disposed above the display shelves 10 and 20, and the cold air is blown out, so that the cold air is sucked into the duct 30 from the pores 14. . In the warm storage mode shown in FIG. 3B, the fan 35 and the opening 31 are arranged above the display shelves 10 and 20 and suck in warm air. Is blown out.

  On the shelf plates 13 of the first and second display shelves 10 and 20, resin-made slats 51 are arranged, respectively. By using a fluorine-based resin having a low friction coefficient as the slats 51, it is possible to obtain the display shelves 10 and 20 in which beverage cans and the like are slippery to some extent. Further, by placing the slats 51 on the shelf board 13, the pores 14 of the shelf board 13 are placed between the shelf board 13 and the displayed product so that they are not blocked by the displayed beverage cans or the like. A certain distance can be secured. Therefore, the product on the display shelf can be cooled by the cool air sucked from the pores 14, and the product can be heated by the warm air blown from the pores 14.

  The first and second display shelves 10 and 20 are provided with a stopper 52 for preventing the product from collapsing in front, the slats 51 and the stopper 52 are omitted, and the shelf main body 12 and the shelf board 13 are formed into a plurality of sheets. It is possible to change such as using a single plate instead of dividing.

  Further, in the vicinity of the second opening 32 of the duct 30, a damper 36 that can control the opening degree of the flow path of the duct 30 reaching the lower side of the outlet 2 is provided. By adjusting the opening degree of the damper 36 by the control unit 64, the amount sucked into the duct 30 from the second opening 32 when the first crossflow fan 34 is driven, and the second crossflow fan The amount of air discharged from the second opening 32 when the 35 is driven can be adjusted. As a result, the flow rate passing through the plurality of pores 14 of the display shelves 10 and 20 can be controlled. In the refrigeration mode, it is desirable to increase the amount of suction from the second opening 32 by increasing the opening of the damper 36, thereby reducing the flow rate through the pores 14. In the warming mode, it is desirable to reduce the opening of the damper 36 to reduce the amount of air blown out from the second opening 32, thereby increasing the flow rate passing through the pores 14.

  FIG. 4 is a flowchart for explaining a temperature control method of the storage device 1. In step 101, when the operation switch 75 is operated to change the mode, in step 102, it is determined whether it is refrigerated or refrigerated. If refrigeration is selected, refrigeration conditions are set at step 103. That is, the first cross flow fan 34 that forms a flow from the bottom to the top in the duct 30 is selected, the direction of the current with respect to the Peltier element unit 63 is selected, and the opening degree of the damper 36 is selected. As a result, the first crossflow fan 34 is driven in step 105, and the damper 36 is opened in step 106. Thus, the duct 30 is blown upward from below to generate cold air, and an air curtain is formed at the outlet 2 by a flow directed from above to below to cool the display chamber 3.

  On the other hand, if warming is selected in step 102, warming conditions are set in step 104. That is, the second cross flow fan 35 that forms a flow from the upper side to the lower side in the duct 30 is selected, the direction of the current with respect to the Peltier element unit 63 is selected, and the opening degree of the damper 36 is selected. In step 105, the second cross flow fan 35 is driven, and in step 106, the damper 36 moves in the closing direction. Accordingly, the duct 30 is blown from the upper side to the lower side to generate hot air, and mainly flows through the internal ducts 40 of the display shelves 10 and 20, and the surfaces of the display shelves 10 and 20 through the plurality of pores 14. The display chamber 3 is warmed by forming an air curtain by the flow from the lower side to the upper side.

  As described above, the storage device 1 of the present embodiment reverses the direction of the cold air and the hot air for forming the air curtain at the outlet 2, thereby reversing the path of the cold air during the refrigeration and the temperature during the refrigeration. The wind path is formed by a common fluid path (duct 30), and is sized so that it can be installed on a shelf (gondola) on which room temperature products such as confectionery and daily necessities in a convenience store are displayed. Furthermore, it is possible to suck in cool air from the display shelves 10 and 20 and blow out warm air, and efficiently cool and warm the products displayed on the display shelves 10 and 20. Further, in the refrigeration mode, by increasing the amount of air forming the air curtain and reducing the amount of air sucked from the display shelf, it is possible to cool the entire interior of the display chamber 3 and prevent the product from condensing. On the other hand, in the warming mode, by reducing the amount of air forming the air curtain and increasing the amount of air blown from the display shelf, it is possible to promote the heating of the product and prevent the temperature of the outlet 2 from rising rapidly. Therefore, it is possible to provide a storage device that can heat and cool a product safely and efficiently.

  Further, the storage device 1 of the present embodiment is designed so that the products displayed on the display shelves 10 and 20 in the display chamber 3 can be easily reached because the front of the horizontally long display chamber 3 is opened. Yes. In addition, the ceiling 5a and the left and right side walls are transparent, so that the products displayed from the top and left and right as well as the front can be seen, so that it can function as a showcase as well as other products on the gondola. Have both. In particular, the transparent canopy 5a can prevent the air for indoor air conditioning from directly hitting the product and improve the efficiency of cooling or heating. And since the inside of the display chamber 3 can be kept bright without arranging the illumination inside the display chamber 3, an increase in the cooling load due to the illumination can be prevented, the Peltier element unit 63 is made small, and the storage device 1 is placed on the shelf. It is possible to combine them into a suitable size. Further, as described above, the canopy 5a contributes to forming an air flow for forming an air curtain at the outlet 2 in the storage device 1 of the present example. Thus, the storage device 1 of the present embodiment is suitable as a storage device that is installed on a shelf such as a convenience store.

  The storage device 1 of the present embodiment is provided with display shelves 10 and 20 in the middle and lower portions of the display chamber 3 and has a two-stage structure. However, the storage device of the present invention has an arbitrary number of display shelves. There may be one stage or three or more stages. In the present embodiment, the internal duct of the second display shelf 20 provided in the lower part is omitted, and the wind blows directly from the duct 30 through the plurality of pores 14, but the second display shelf Similarly to the first display shelf 10, the internal duct 40 may also be provided at 20.

It is a perspective view which shows the external appearance of the storage apparatus which concerns on one Embodiment of this invention. The disassembled perspective view for demonstrating the display shelf with which the storage apparatus shown in FIG. 1 is provided. It is a longitudinal cross-sectional view which shows the storage apparatus shown in FIG. 1, Comprising: (a) is a figure for demonstrating the flow of the cold air in refrigeration mode, (b) demonstrates the flow of the warm air in the refrigeration mode. Figure for. The flowchart for demonstrating the temperature control method of the storage apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Storage device, 2 Outlet 3 Display room, 4 Cold / hot air supply unit 10, 20 Display shelf, 14 Porous 30 Duct, 36 Damper 40 Internal duct, 61 Peltier element 62 Heater, 63 Peltier element unit 64 Control unit

Claims (10)

A display room in which at least a part of the front is an open outlet,
A cold / hot air supply unit comprising a Peltier element unit and capable of supplying cold air and hot air for forming an air curtain at the outlet through ducts disposed below and behind the display chamber;
A refrigeration mode in which air is blown upward from below to the duct to generate cold air, an air curtain is formed at the outlet by a flow directed downward from above, and the display chamber is refrigerated, and the duct is from above A storage unit having a control unit capable of generating a warm air by blowing downward, forming an air curtain by a flow directed downward from above at the outlet, and selecting a warming mode for warming the display chamber apparatus.   2. The display chamber according to claim 1, wherein the display chamber includes at least one display shelf, and the at least one display shelf includes an internal duct that communicates the duct with a plurality of pores provided in a surface constituent member of the display shelf. Equipped storage device. The damper according to claim 2, further comprising a damper capable of controlling a flow rate passing through the plurality of pores.
The control unit is configured to reduce a flow rate passing through the plurality of pores in the refrigeration mode and increase a flow rate passing through the plurality of pores in the refrigeration mode. In claim 2,
The duct includes a damper that can control the opening degree of the flow path to the lower side of the outlet,
The control unit increases the opening degree of the damper in the refrigeration mode and decreases the opening degree of the damper in the refrigeration mode.   The storage device according to claim 1, wherein the cold / hot air supply unit includes a heater disposed in the duct.   The storage device according to claim 2, wherein the cool / warm air supply unit includes a heater disposed in a communication upper portion between the duct and an internal duct of the display shelf.   7. The transparent canopy according to any one of claims 1 to 6, wherein the canopy reaches the upper end of the outlet from above the display chamber, and the canopy includes an opening of the duct provided above the display chamber and the take-off. A storage device that guides air flow to and from the outlet. A temperature control method for a storage device, wherein the storage device includes:
A display room in which at least a part of the front is an open outlet,
A cold / hot air supply unit that includes a Peltier element unit and that can supply cold air and hot air to form an air curtain at the outlet through ducts disposed below and behind the display chamber. ,
The temperature control method includes:
When refrigeration is selected, the duct is blown upward from below to generate cold air, and an air curtain is formed at the outlet by a flow directed downward from above to refrigerate the display chamber;
When warm storage is selected, warm air is generated by blowing air from above to the duct, and the display chamber is warmed by forming an air curtain at the outlet from the flow upward from below. And a temperature control method. 9. The display shelf according to claim 8, wherein the display shelf of the display chamber of the storage device includes an internal duct that communicates the duct and a plurality of pores provided in a surface constituting member of the display shelf. It further has a damper capable of controlling the flow rate passing through the plurality of pores,
In the refrigeration step, the flow rate passing through the plurality of pores is reduced,
The temperature control method, wherein in the step of warming, the flow rate passing through the plurality of pores is increased. 9. The display shelf according to claim 8, wherein the display shelf of the display chamber includes an internal duct that communicates the duct with a plurality of pores provided in a surface constituent member of the display shelf. Equipped with a damper that can control the opening of the flow path to the lower side of the outlet,
In the refrigeration step, the opening of the damper is increased,
A temperature control method in which the opening of the damper is reduced in the step of warming.

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