JP2017189463A - Show case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a show case in which a cold chamber and a cold/hot chamber are partitioned by a partition wall, the cold/hot chamber can be switched between a cold mode and a hot mode only by switching operation of a mode selection lever, and the cold/hot chamber can be cooled inside not only in a cold mode but also in a hot mode without causing a large rise of a manufacturing cost.SOLUTION: A partition wall 2 includes: an opening 22 for cold air for sending cold air in a cold chamber 3 into a cold/hot chamber 4; a damper 24 opening/closing the opening 22 for cold air; an opening/closing mechanism 25 opening/closing the damer 24 by receiving operation of a mode selection lever 36; a heating structure 26 for sending hot air toward the cold/hot chamber 4; and a forcible sending structure 27 for sending forcibly cold air in the cold chamber 3 into the cold/hot chamber 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a showcase including a refrigerator compartment and two storage compartments of a refrigerator compartment that can be switched between a refrigerator mode and a refrigerator mode. The present invention is particularly suitable as a showcase for food and drink installed in a small manned store provided in a station platform.

  The showcase according to the present invention includes an operation mechanism for switching the refrigeration room between the refrigeration mode and the refrigeration mode in a partition wall that partitions the refrigeration room and the cold storage room. It is disclosed in Document 1 and is publicly known. In the showcase described in Patent Document 1, a lever as an operation unit for switching the cold / warm room between the cold mode and the warm mode is configured to be movable in the front-rear direction below the partition wall. When the lever is moved backward, the damper is opened, and the refrigeration chamber side cold air flows into the refrigeration room side. The cold air is prevented from flowing into the cold storage room, and the heater installed in the cold storage room is in a storage mode in which the heater is turned on.

  Inside the partition wall, there are provided a damper drive mechanism that opens and closes the damper according to a lever operation, and an operation mode changeover switch that switches an on / off operation of the heater in the cold / warm room. The damper drive mechanism is composed of a total of four damper arms that connect the lever and the damper, and a switch bar. The damper is opened and closed via the damper arm according to the movement operation of the lever in the front-rear direction, and the switch lever Thus, the operation mode changeover switch is turned on and off.

Japanese Patent Laid-Open No. 2002-102024 (FIGS. 1, 6, and 7)

  According to the showcase described in Patent Document 1, the operation of switching the operation mode of the cold / warm room accompanied by the opening / closing operation of the damper and the on / off operation of the heater can be performed only by moving the lever. The operation mode of the room can be switched easily and reliably. However, the showcase described in Patent Document 1 cannot cool the cold storage room in the storage mode, and there is room for improvement in that respect.

  In other words, the temperature control in the refrigerator in the storage mode of the cold storage room in this type of showcase is not limited to the heating control that simply involves the heater on / off operation, and cooling control is required for the cold storage room. There are also cases (for example, when the temperature inside the cabinet is inadvertently raised due to the warm air of the air conditioner entering the cold storage room in winter). However, in the showcase described in Patent Document 1, it is not assumed that the cooling control for the cold storage room is performed in the storage mode, and there is room for improvement in that respect.

  However, the cooling control of the refrigerator compartment in the refrigerator mode as described above is performed by installing individual coolers in the refrigerator compartment and the refrigerator compartment, and using the detected temperature in the refrigerator compartment as the set temperature. It can be completely eliminated by controlling the cooler on and off while comparing. However, in the case of adopting the configuration as described above, it is inevitable that the manufacturing cost of the showcase will increase significantly as much as the cooler is installed in each room, and the refrigerant from the compressor to the cooler is inevitably increased. It is inevitable that the manufacturing cost of the showcase will rise significantly in terms of the complicated supply route.

  An object of the present invention is that a partition between a refrigerator compartment and a refrigerator greenhouse is partitioned by a partition wall, and the refrigerator compartment is switched between a refrigerator mode and a refrigerator mode only by a switching operation of a mode selection lever provided on the partition wall. In the showcase that can be switched to, the cold storage room can be cooled not only in the refrigeration mode but also in the refrigeration mode without causing a significant increase in manufacturing cost.

  The present invention includes a refrigerating room 3, a refrigerating / warming room 4, and a partition wall 2 that divides both chambers 3 and 4, and the mode selection lever 36 provided on the partition wall 2 is switched to operate the cooling / warming temperature. It is intended for a showcase in which the storage room 4 can be switched between a refrigerated mode and a warmed mode. In response to the operation of the cool air opening 22 for allowing the cool air in the refrigerating chamber 3 to flow into the refrigerating and refrigerating chamber 4, the damper 24 for opening and closing the cool air opening 22, and the mode selection lever 36, the damper is received on the partition wall 2. An open / close mechanism 25 that opens and closes 24, a heating structure 26 for sending warm air toward the cold / warm room 4, and forced sending for forcibly feeding cold air in the cold room 3 into the cold / hot room 4 A feeding structure 27 is provided.

  The heating structure 26 opens to the cold storage room 4 side and takes in the air in the refrigerator compartment 4 and takes in air inside the cold storage room 4. The heating structure 26 opens to the cold storage room 4 side and warms toward the cold storage room 4. And a heating bypass passage 42 that guides the air taken in from the air intake port 40 to the warm air supply port 41. The heating fan bypass passage 42 is heated with the first blower 43 for taking the inside air into the bypass passage 42 via the air intake port 40 and the inside air taken in from the air intake port 40. A heater 44 for warming air is provided. The forced supply structure 27 is taken in from the cold air inlet 50 that opens to the refrigerator compartment 3 side and takes in cold air, the cold air outlet 51 that opens to the cold-warm chamber 4 side and sends out cold air, and the cold air inlet 50. And a bypass passage 52 for cool air that guides the cool air to the cool air outlet 51. The cold air bypass passage 52 is provided with a second blower 53 for taking in the cold air from the cold air inlet 50 and delivering the cold air from the cold air outlet 51.

  When the warming mode is selected, the first blower 43 is normally turned on regardless of the on / off control of the heater 44 and the on / off control of the second blower 53 constituting the forced feeding structure 27. The air in the refrigerator compartment 4 is configured to be circulated by the air blown by the blower 43.

  The partition wall 2 is divided into a lower chamber 30 in which a mode changeover switch 32 that is turned on and off in response to operations of the damper 24, the opening / closing mechanism 25, and the mode selection lever 36 is disposed, and an upper chamber 31 in which a heater 44 is disposed. 29. The bypass path 42 for heating avoids the opening / closing mechanism 25 and is configured to straddle the upper and lower chambers 31 and 30. The first blower 43 is installed in the middle of the heating bypass path 42 in an inclined posture with its fan shaft facing obliquely upward.

  Ducts 15 and 18 for feeding cold air toward both chambers 3 and 4 are provided on the side surfaces of the refrigerator compartment 3 and the cold and warm compartment 4. A warm air outlet 41 and the cold air outlet 51 are provided on the side surface of the upper chamber 31 of the partition wall 2 so as to face the duct 18.

  In the showcase 1 according to the present invention, a heating structure 26 for sending warm air toward the cold / warm room 4 and the cold air in the cold room 3 are supplied to the partition wall 2 that partitions the cold room 3 and the cold / warm room 4. A forced feeding structure 27 for forcibly feeding toward the cold / warm room 4 is provided, and when the warm mode is selected, warm air is fed to the cold / warm room 4 by the heating structure 26, or Cold air was supplied to the cold / hot storage room 4 by the forced supply structure 27. According to the showcase 1 having the above-described configuration, when the internal temperature of the cold storage room 4 is lower than a predetermined set temperature in the state where the storage mode is selected, the heating structure 26 cools the warm air. The inside of the cold / hot storage room 4 can be heated and controlled by feeding it into the storage room 4, and when the inside temperature of the cold / hot storage room 4 is higher than a predetermined set temperature, the forced supply structure 27 Thus, the inside of the cold / warm room 4 can be controlled to be cooled by supplying the cold air in the cold room 3.

  As described above, in the present invention, the cooling control in the refrigeration mode employs a structure in which the inside of the refrigeration room 4 is cooled using the cold air in the refrigeration room 3, so that each of the refrigeration room 3 and the refrigeration room 4 is provided. Compared to the configuration in which the cooler is installed, the cooling structure of the cold / warm room 4 is remarkably simplified, the manufacturing cost can be reduced, and the showcase having the cooling capacity in the warming mode can be provided at a lower cost. Further, the showcase 1 having such a configuration is suitable as a showcase 1 for a lunch box in which the room temperature of the cold / hot storage room 4 is set in a range of 15 to 20 ° C., and is warmed by an air conditioner in winter, for example. Even when the outside air enters the cold storage room 4 and the temperature in the cold storage room 4 rises, the forced supply structure 27 cools the cold storage room 4 by sending cold air into it. The inside of the cabinet and the stored items can be kept at the optimum temperature.

  Further, according to the present invention, not only the mode selection lever 36, the damper 24, and the opening / closing mechanism 25 but also the heating structure 26 and the forcible feeding structure 27 are provided on the partition wall 2, so that all the mode switching structures are partitioned. Since it is centrally arranged on the wall 2, the storage space loss of the refrigerator compartment 3 and the refrigerator compartment 4 is reduced and larger accommodation compared to the case where a switching structure is provided in each of the refrigerator compartment 3 or the refrigerator compartment 4. Space can be secured.

  Specifically, as the heating structure 26, an air inlet 40 and a warm air outlet 41 are provided on the cold storage room 4 side of the partition wall 2, and are provided between the air inlet 40 and the warm air outlet 41. A bypass passage 42 for heating is provided, and a first blower 43 and a heater 44 are provided in the bypass passage 42. As the forced supply structure 27, a cold air inlet 50 is provided on the side of the refrigerator compartment 3, and a cold air outlet 51 that opens to the side of the cold compartment 4 and sends out the cold air, and the cold air inlet 50 and the cold air outlet 51 A bypass passage 52 for cold air is provided therebetween, and a second blower 53 is provided in the bypass passage 52. By adopting the heating structure 26 and the forced supply structure 27 as described above, the both structures 26 and 27 can be centrally arranged in the partition wall 2, so that the heating structure 26 or the forced convection structure 27 is placed in the refrigerator compartment 3. The loss of the storage space of the refrigeration chamber 3 and the refrigeration chamber 4 can be reduced as compared with the configuration provided inside or in the refrigeration chamber 4, and a larger storage space can be secured in these chambers 3 and 4.

  When the warming mode is selected, the first blower 43 that constitutes the heating structure 26 is normally turned on, and the air in the refrigerator compartment 4 is circulated by the air blown by the blower 43. Can be taken. According to this, since the inside of the cold storage room 4 can be cooled or heated by the forced convection method in the storage mode, the inside of the cold storage room 4 can be cooled more efficiently.

  The inside of the partition wall 2 is divided into a lower chamber 30 and an upper chamber 31, and a heating bypass passage 42 is disposed so as to straddle the upper and lower chambers 31 and 30, and the first blower 43 is inclined so that the fan shaft faces obliquely upward. It is possible to adopt a configuration that is installed in the middle of the heating bypass path 42 in the posture. According to this, since the vertical dimension of the first blower 43 can be reduced as compared with the case where the first blower 43 is in a horizontal posture in which the fan shaft is oriented in the vertical direction, the heating bypass is provided. The thickness dimension in the vertical direction of the path 42 can be reduced. This means that the thickness dimension in the vertical direction of the partition wall 2 can be reduced. As a result, the loss of the storage space in the refrigeration room 3 and the cold storage room 4 is reduced, and the capacity of the storage space is increased. Can contribute.

  Ducts 15 and 18 for feeding cold air toward both the chambers 3 and 4 are provided on the side surfaces of the refrigerator compartment 3 and the refrigerator compartment 4 so as to face the duct 18 on the side surface of the upper chamber 31 of the partition wall 2. It is possible to adopt a configuration in which the warm air outlet 41 and the cold air outlet 51 are provided. According to this, since the warm air can be sent into the cold storage room 4 using the cool air duct 18, the heating structure 26 can be simplified and the showcase compared with a case where a separate warm air duct is provided. 1 manufacturing cost can be reduced. Further, since there are no openings such as the warm air outlet 41 and the cold air outlet 51 on the upper surface of the partition wall 2, it is difficult to cause a problem of malfunction caused by closing the opening with storage items. Contributes to improved reliability. Since stored items can be placed on the partition wall 2, the storage space can be increased in capacity.

FIG. 3 is a cross-sectional plan view of the partition wall constituting the showcase according to the present invention (a cross-sectional view taken along line AA in FIG. 2). It is a vertical front view which shows the outline of the showcase which concerns on this invention. It is a vertical front view of a partition wall (BB sectional view of Drawing 1), and shows a heating structure. It is a vertical side view of a partition wall. It is a vertical front view (CC sectional view of FIG. 1) of a partition wall, and shows the forced feeding structure. It is a vertical side view of a showcase. It is a cross-sectional top view of the partition wall for demonstrating an opening-and-closing mechanism, (a) is a refrigeration mode, and has shown the state when a damper is in an open position, (b) is a refrigeration mode, and a damper Indicates a state of being in a closed posture. It is a figure for demonstrating operation | movement of a showcase, (a) is a refrigeration mode, and has shown the state when a damper exists in an open position, (b) is a refrigeration mode, and a damper is a closed position It shows the state when It is a flowchart for demonstrating operation | movement of the showcase in warm storage mode.

  FIG. 1 to FIG. 9 show an embodiment in which the present invention is applied to a showcase installed at a manned sales office of a station platform. In the present embodiment, front and rear, left and right, and up and down follow the cross arrows shown in FIGS. 1, 2, and 6, and the front, back, left, right, and top displays shown near each arrow. As shown in FIG. 2, the showcase 1 includes two storage chambers, a lower refrigeration chamber 3 partitioned by a partition wall 2 and an upper refrigeration chamber 4 with a vertically long heat insulating box as a base. . As shown in FIGS. 1 and 6, openings are provided in the front and rear of the refrigerator compartment 3 and the refrigerator compartment 4, respectively, and the sliding door type glass doors 5 and 5 that are opened and closed in the openings are opened and closed. Is installed. By providing openings in the front and rear in this way, it is possible to sell products from the front of each chamber 3 and 4 and replenish the products from the rear of each chamber 3 and 4. Each room 3 and 4 is provided with a product display shelf 6 whose height position can be changed.

  As shown in FIG. 2, a machine room 7 is disposed below the refrigerating room 3. In the machine room 7, a cooler 9 that generates heat by exchanging heat and air in the refrigerating room 3 are supplied. A blower 10 is provided for sucking and supplying cold air into the refrigerator compartment 3 through the cooler 9. Reference numeral 11 denotes an outdoor unit that includes the compressor 12, the condenser 13, and the blower 14 for the condenser 13, and sends the refrigerant to the cooler 9 in the machine room 7.

  As shown in FIGS. 2 and 8, a lower duct 15 for cold air is provided on the left side surface of the refrigerator compartment 3, and is sucked from a suction port 16 opened on the bottom wall of the refrigerator compartment 3 by the blower 10. The inside air in the refrigerator compartment 3 is cooled by the cooler 9 and then blown into the refrigerator compartment 3 from the cold air outlet 17 provided in the lower duct 15. In addition, when a cooling mode to be described later is selected, cold air is also supplied to the cold storage room 4 via the upper duct 18 provided on the left side surface of the cold storage room 4 and communicating with the lower duct 15. . Reference numeral 19 denotes an air outlet provided in the upper duct 18, and cold air supplied to the upper duct 18 and warm air generated by a heating structure 26 described later are supplied from the air outlet 19 into the cold / warm storage chamber 4. Be blown out.

  As shown in FIGS. 3 and 4, the partition wall 2 is formed in a hollow shape provided with a lower lower plate 20 facing the refrigerator compartment 3 and an upper upper plate 21 facing the refrigerator compartment 4, A pair of left and right openings (openings for cold air) 22 (22a and 22b) for allowing the cold air in the refrigerator compartment 3 to flow into the cold refrigerator compartment 4 are provided at the left and right ends. Inside the partition wall 2, a pair of left and right dampers 24 (24 a, 24 b) that open and close the openings 22 a, 22 b and a damper opening / closing mechanism that opens and closes the dampers 24 a, 24 b in response to the operation of the mode selection lever 36 ( An opening / closing mechanism) 25, a heating structure 26 for sending warm air toward the cold / warm room 4, and a forced feeding structure 27 for forcing the cold air in the cold room 3 into the cold / warm room 4; Is provided.

  As shown in FIG. 3, the interior of the partition wall 2 is divided into two chambers, a lower chamber 30 and an upper chamber 31, by a partition wall 29 disposed between the lower plate 20 and the upper plate 21. Openings 22a and 22b are formed in the left and right ends of the partition wall 2 so as to be long in the front-rear direction. Inside the lower chamber 30, dampers 24a and 24b long in the front-rear direction for opening and closing the openings 22a and 22b, respectively, A damper opening / closing mechanism 25 that opens and closes the dampers 24a and 24b at the same time, and a mode changeover switch 32 for changing the operation mode of the cold / hot storage room 4 between the cold storage mode and the warm storage mode are arranged. The mode switch 32 is composed of a magnetic proximity sensor, and the state of the switch is switched depending on the presence or absence of a magnet, and the output is turned on when the magnet is brought close.

  As shown in FIG. 3, the damper 24a on the left side includes a connecting piece 60 connected to the damper opening / closing mechanism 25, and a square columnar damper that closes the opening 22a in the closed position (FIGS. 7B and 8B). A main body 61 and an upper piece 62 extending upward from the damper main body 61 and closing a warm air outlet 41 and a cold air outlet 51, which will be described later, in an open position (FIG. 7 (a), FIG. 8 (a)); And a lower piece 63 for closing the cold air outlet 17 (17a) located at the uppermost end of the lower duct 15 in the open posture. The right damper 24b is generally in common with the shape of the left damper 24a except that the length of the upper piece 62 in the vertical direction is shorter than that of the left damper 24a.

  As shown in FIGS. 1, 4, and 7 (a) and 7 (b), the damper opening / closing mechanism 25 includes a moving body 33 configured to be movable in the front-rear direction at the center of the lower chamber 30 in the partition wall 2. A total of four damper arms 34 for connecting the movable body 33 and the dampers 24a and 24b respectively, and a magnet at the tip that extends in a cantilevered direction from the movable body 33 to turn the mode switch 32 on and off. And a switch bar 35. A mode selection lever 36 as an operation unit is connected to the moving body 33. The mode selection lever 36 protrudes outward and downward from the partition wall 2 from a slit 37 that is long in the front-rear direction at the center in the left-right direction of the lower plate 20 of the partition wall 2, as shown in FIG. When the mode selection lever 36 is moved backward along the slit 37 and the refrigeration chamber 4 is set to the refrigeration mode, the dampers 24a and 24b are moved via the movable body 33 and the damper arm 34 constituting the damper opening / closing mechanism 25. It can be set as the open posture which opens opening 22a * 22b. Further, as shown in FIG. 7B, when the mode selection lever 36 is moved in the forward direction and the cold storage room is set to the warming mode, the dampers 24a and 24b may be closed to close the openings 22a and 22b. it can.

  4 and 7, reference numeral 39 denotes a catcher composed of magnets arranged at two front and rear positions in the lower chamber 30 for the purpose of holding the moving body 33 moved to the front end position or the rear end position. Show. When the catchers 39 and 39 are provided in this way, the moving body 33 moved to the position of the front end or the rear end in response to the operation of the mode selection lever 36 can be sucked and held, so that it moves carelessly. It can prevent that the body 33 moves and the mode of the cold / warm room 4 is changed.

  As shown in FIG. 3, the opening 22a on the left side of the partition wall 2 is formed at the connecting portion of the upper and lower ducts 15 and 18, and the left damper 24a functions as an opening / closing element for the upper and lower ducts 15 and 18. . Specifically, when the mode selection lever 36 is moved rearward to open the left damper 24a (see FIG. 7A), the opening 22a is opened and the upper and lower ducts 15 and 18 are brought into a communication state. By doing so, cold air can be flowed from the lower duct 15 toward the upper duct 18, and the cold air can be fed into the cold storage room 4 (FIG. 8A). At this time, the right damper 24b is also in an open posture in synchronization with the left damper 24a, so that the opening 22b provided at the right end of the partition wall 2 is opened, and the cold storage room 4 and the cold storage room 3 are in communication with each other. As described above, air can be caused to flow from the cold storage room 4 into the cold storage room 3.

  When the lever 36 is moved in the forward direction and the left and right dampers 24a and 24b are closed, the openings 22a and 22b can be closed. Accordingly, in the state where the dampers 24a and 24b are in the closed posture, air does not flow through the openings 22a and 22b.

  As shown in FIG. 1 and FIG. 3, the heating structure 26 is provided near the front of the partition wall 2, opens to the side of the cold / warm room 4 and takes in the air in the cold / warm room 4. An inlet 40, a warm air outlet 41 that opens to the cold storage room 4 and sends warm air toward the cold storage room 4, and a heating bypass that guides the air taken in from the air intake 40 to the warm air outlet 41 A first air blower 43 for taking in the internal air into the bypass passage 42 for heating via the air intake port 40, provided in the passage 42, and the heating bypass passage 42; It is comprised with the heater 44 which heats the produced internal air and makes warm air. In FIG. 3, reference numeral 45 denotes an internal temperature sensor for measuring the temperature of the internal air sucked from the air intake 40 (internal temperature of the cold / hot storage room 4), and reference numeral 46 denotes after heating by the heater 44. The warm air sensor which measures the temperature of warm air of is shown. 8 (a) and 8 (b), reference numeral 47 denotes an interior for measuring the temperature of the interior air that is disposed in the machine room 7 and is sucked from the suction port 16 (the interior temperature of the refrigerator compartment 3). A temperature sensor is shown. These sensors 45, 46 and 47 are thermistors.

  The heating bypass path 42 is configured to straddle the upper chamber 31 and the lower chamber 30. Specifically, as shown in FIG. 3, the heating bypass passage 42 is connected to the first chamber 42 a on the upper chamber 31 side having the air intake port 40 and the lower chamber 30 side in communication with the first chamber 42 a. The second chamber 42b is formed, and the third chamber 42c is formed on the upper chamber 31 side in communication with the second chamber 42b. A first blower 43 is disposed between the second chamber 42b and the third chamber 42c, and a heater 44 is disposed in the third chamber 42c. As described above, the air sucked into the first chamber 42a on the upper chamber 31 side from the air intake port 40 provided at the right end of the partition wall 2 by the first blower 43 is the second chamber 42b on the lower chamber 30 side. After being sent to the inside, it is sent again to the third chamber 42c on the upper chamber 31 side, heated by the heater 44 to be warmed, and then cooled and warmed from the warm air outlet 41 provided at the left end of the upper chamber 31. It is blown out into the chamber 4. The warm air outlet 41 communicates with the lower end of the upper duct 18, and the warm air is blown out from the air outlet 19 into the cold / warm room 4 through the upper duct 18.

  The heating bypass path 42 is formed so as to avoid the damper opening / closing mechanism 25. Specifically, as shown in FIGS. 7A and 7B, the second chamber 42b constituting the heating bypass passage 42 is formed between the front and rear damper arms 34 and 34. The damper arm 34 is configured not to interfere with the movement trajectory in the front-rear direction accompanying the opening / closing operation of the dampers 24a and 24b. The first blower 43 is disposed between the second chamber 42b and the third chamber 42c in an inclined posture in which the fan shaft faces obliquely upward.

  In this way, the inside of the partition wall 2 is divided into the upper chamber 31 and the lower chamber 30, and the heating bypass path 42 is disposed so as to straddle the upper and lower chambers 31 and 30, and the first blower 43 is installed. If it arrange | positions with the inclination attitude | position, the dead space in the partition wall 2 can be decreased, and the space of the partition wall 2 can be reduced and thickness reduction can be achieved. Thereby, the ratio which the partition wall 2 occupies in the showcase 1 can be made small, and the storage space of the refrigerator compartment 3 or the refrigerator compartment 4 of the showcase 1 can be taken large.

  As shown in FIG. 1 and FIG. 5, the forced feeding structure 27 for forcibly feeding the cold air in the refrigerator compartment 3 into the cold-warm compartment 4 is arranged on the left rear side of the partition wall 2. A cold air inlet 50 that opens to the refrigerating room 3 side and takes in the air (cold air) in the refrigerating room 3, a cold air outlet 51 that opens to the cold and hot room 4 side and sends out the cold air, and a cold air inlet 50 And a cold air bypass passage 52 formed between the cold air outlet 51 and a second blower 53 provided in the cold air bypass passage 52. The cold air intake 50 is established in the lower plate 20, and the second blower 53 is disposed so as to face the cold air intake 50, and the cold air bypass passage 52 includes the lower chamber 30 and the upper chamber 31. It is configured to straddle. The cold air outlet 51 is provided on the upper chamber 31 side and communicates with the lower end of the upper duct 18, and the cold air sent from the cold air outlet 51 to the upper duct 18 is supplied from the outlet 19 into the cold / warm compartment 4. Is blown out. As shown in FIG. 1, the warm air outlet 41 and the cold air outlet 51 are opened on the left side of the upper chamber 31.

  The forced feeding structure 27 is formed so as to avoid the damper opening / closing mechanism 25. Specifically, as shown in FIGS. 7 (a) and 7 (b), the cool air bypass path 52 is disposed on the rear side of the left rear damper arm 34, and is associated with the opening / closing operation of the dampers 24a and 24b. The damper arm 34 does not interfere with the movement trajectory in the front-rear direction.

  Next, a method of using the showcase 1 having the above configuration will be described. First, when the refrigerator compartment 4 is used in the refrigerator mode, the glass door 5 on the rear side of the refrigerator compartment 3 is opened, and a mode selection lever 36 protruding downward from the partition wall 2 as indicated by a virtual line in FIG. Pull backwards. As a result, as shown in FIG. 7A, the moving body 33 constituting the damper opening / closing mechanism 25 moves rearward, and accordingly, the dampers 24a and 24b move inward in the left-right direction via the damper arm 34, and the opening is opened. The cool air flowing through the lower duct 15 flows into the upper duct 18 through the left opening 22a, and is supplied from the air outlet 19 into the cold storage room 4. At this time, the air in the refrigerator compartment 4 is returned to the refrigerator compartment 3 through the opening 22b on the right side, whereby cold air circulates between the refrigerator compartment 3 and the refrigerator compartment 4, and the inside of the refrigerator compartment 3 The product is refrigerated.

  As shown in FIG. 8A, when the dampers 24a and 24b are moved inward in the left-right direction, the cold air outlet 17 (17a) located at the uppermost end of the lower duct 15 moves the left damper 24a. Since it is closed by the lower piece 63 that constitutes, more cold air can be sent to the cold storage room 4 via the upper duct 18. When the dampers 24a and 24b are moved inward in the left-right direction, the warm air outlet 41 and the cold air outlet 51 facing the upper duct 18 are closed by the upper piece 62 constituting the left damper 24a. The cold air sent into the duct 18 does not flow into the warm air outlet 41 and the like, and more cold air can be sent to the cold / hot storage room 4.

  As described above, in the refrigerating mode, both the refrigerating room 3 and the refrigerating / warming room 4 are controlled to be cooled by the cold air supplied from the cooler 9. That is, in the refrigerating mode, the refrigerating room 3 and the refrigerating / warming room 4 are controlled to be at the same temperature as one room. More specifically, the internal air temperature (detected temperature) measured by the internal temperature sensor 47 installed in the machine room 7 is compared with a preset threshold temperature, and the internal temperature sensor The cooler 9 is on / off controlled so that the temperature detected by 47 is within the threshold. As shown in FIG. 7A, in the refrigeration mode, the switch bar 35 is separated from the mode changeover switch 32 and turns off the switch 32. Therefore, the heater 44 constituting the heating structure 26, etc. Will never turn on. Moreover, as shown to Fig.7 (a), since the moving body 33 is hold | maintained by the catcher 39 located in the back side, careless displacement of the moving body 33 is prevented.

  When the cold storage room 4 is used in the storage mode, the mode selection lever 36 is pushed forward as shown by the solid line in FIG. As a result, the moving body 33 constituting the damper opening / closing mechanism 25 moves forward, and accordingly, the dampers 24a and 24b move outward in the left-right direction via the damper arm 34, and the openings 22a and 22b are closed (FIG. 8 ( b)). From the above, the flow of cold air from the refrigerator compartment 3 to the refrigerator compartment 4 via the openings 22a and 22b is blocked. Further, as the mode selection lever 36 moves, the magnet at the tip of the switch bar 35 comes close to the mode changeover switch 32 and turns it on, and the heating structure 26, the forced feeding structure 27, etc. are in operation.

  The flowchart of FIG. 9 shows the control operation of the showcase 1 in the warming mode. First, when the warming mode is selected by the operation of the mode selection lever 36 as described above (YES in S1), the first blower 43 constituting the heating structure 26 is activated, and the cold warming chamber 4 The inside air is forcibly circulated (S2). Note that the forced circulation of the first blower 43 to the cold storage room 4 is continued until the storage mode ends (NO in S9, NO in S14) (S15).

  When the warm mode is selected (YES in S1), the showcase 1 compares the internal temperature (T1) detected by the internal temperature sensor 45 with the set temperature (Tc (eg, 18 ° C.)) ( S3) When the internal temperature (T1) is equal to or higher than the set temperature (Tc) (≧ in S3), the internal temperature (T1) detected by the internal temperature sensor 45 is set to the upper limit value of the set temperature. Is compared with a first threshold value (Tc + d1) for defining (S4). Here, d1 is, for example, 0.5 ° C., and the first threshold may be “18.5 ° C.”. When the internal temperature (T1) is equal to or higher than the first threshold (Tc + d1) (YES in S4), it is determined that the internal temperature is high and cooling control is necessary, and the forced feeding structure 27 is configured. The 2nd air blower 53 is started and the cool air by the side of the refrigerator compartment 3 is sent in into the refrigerator compartment 4 (S5). On the other hand, when the internal temperature (T1) is lower than the first threshold value (Tc + d1) (NO in S4), it is determined that the internal temperature is not high and cooling control is unnecessary, and the process returns to S3.

  The supply of cold air by the forced supply structure 27 is continued until the internal temperature of the cold / hot storage room 4 is lowered to a predetermined temperature. Specifically, when the internal temperature (T1) detected by the internal temperature sensor 45 is equal to or lower than the second threshold (Tc-d2) (YES in S6), the second blower 53 of the forced feeding structure 27 is used. Is stopped (S7). On the other hand, when the internal temperature (T1) exceeds the second threshold value (Tc-d2) (NO in S6), the driving of the second blower 53 is continued. Here, d2 can be 2 ° C., for example, and the second threshold can be “16 ° C.”.

  When the inside of the cold storage room 4 falls into a supercooled state, heating control by the heating structure 26 is performed. Specifically, when the internal temperature (T1) detected by the internal temperature sensor 45 is lower than the first low temperature threshold (Tc-P1) for 5 minutes (first heating condition), or When the chamber temperature (T1) is lower than the second low temperature threshold value (Tc-P2) for 2 seconds (second heating condition) (YES in S8), the warming mode is continued. If the warming mode is continued (YES in S9), the heater 44 is energized (S10), and the warm air generated by the heater 44 is sent into the cold warming chamber 4 . Here, as P1, for example, 2 ° C. can be exemplified, and as the first low temperature threshold, “16 ° C.” can be exemplified. Further, as P2, for example, “5 ° C.” can be mentioned, and as the second low temperature threshold, “13 ° C.” can be mentioned. In other words, in this embodiment, the state where the internal temperature (T1) captured by the internal temperature sensor 45 is 16 ° C. or lower continues for 5 minutes, or the internal temperature (T1) is 13 ° C. or lower. Is continued for 2 seconds (YES in S8), the heater 44 is energized to perform heating control (S10). On the other hand, when the internal temperature (T1) does not satisfy the first heating condition based on the first low temperature threshold or the second heating condition based on the second low temperature threshold (NO in S8), The heating control is not performed, and the process returns to S3.

  As described above, in this showcase 1, when the internal temperature (T1) captured by the internal temperature sensor 45 is equal to or higher than the set temperature (Tc) (≧ in S3), forced to reach S4 to S7. Cooling control by the feed structure 27 is performed. However, even if the internal temperature (T1) captured by the internal temperature sensor 45 is equal to or higher than the set temperature (Tc) (≧ in S3), if it is below the first threshold (Tc + d1) Cooling control is not performed (NO in S4). Similarly, even if the internal temperature (T1) captured by the internal temperature sensor 45 is lower than the set temperature (Tc) (<in S3), the internal temperature (T1) is the first low temperature. When the first heating condition based on the threshold value or the second heating condition based on the second low temperature threshold value is not satisfied (NO in S8), the heating control is not performed.

  When energization of the heater 44 is started (S10), the temperature of the warm air is measured by the warm air sensor 46 disposed on the downstream side of the heater 44 (S11), and the detected temperature (T2) by the sensor 46 is the third threshold value. If less than (Tc + d3) (NO in S11), energization to the heater 44 is continued, and if the detected temperature (T2) is equal to or higher than the third threshold (Tc + d3) (YES in S11), energization to the heater 44 is stopped (S12). As d3 here, 5 degreeC can be mentioned, for example, and "23 degreeC" can be mentioned as a 3rd threshold value.

  When the inside of the cold storage room 4 falls into an overheated state, cooling control by the forced feeding structure 27 is performed. Specifically, when the internal temperature (T1) detected by the internal temperature sensor 45 is higher than the first high temperature threshold (Tc + P3) for 5 minutes (first cooling condition), or If the temperature (T1) is higher than the second high temperature threshold (Tc + P4) for 2 seconds (second cooling condition) (YES in S13), confirm that the warming mode is continued If the warm storage mode is continued (YES in S14), the process returns to S3. As P3 here, 2 degreeC can be mentioned, for example, and "20 degreeC" can be mentioned as a 1st high temperature threshold value. Moreover, as P4, 5 degreeC can be mentioned, for example, and "23 degreeC" can be mentioned as a 2nd high temperature threshold value. That is, in the present embodiment, the state where the internal temperature (T1) captured by the internal temperature sensor 45 is 20 ° C. or higher continues for 5 minutes, or the internal temperature (T1) is 23 ° C. or higher. Is continued for 2 seconds (YES in S13), the process returns to S3, the second blower 53 of the forced feed structure 27 is activated, and cold air is sent into the cold / hot storage room 4. On the other hand, when the internal temperature (T1) does not satisfy the first cooling condition based on the first high temperature threshold or the second cooling condition based on the second high temperature threshold (NO in S13), Cooling control is not performed, and the process returns to S10. When the warming mode is finished (NO in S14), the first blower 43 is stopped and the cooling mode is returned.

  As described above, in the showcase according to the present embodiment, the heating wall 26 for sending warm air toward the cold / warm room 4 to the partition wall 2 that partitions the cold room 3 and the cold / warm room 4, and the inside of the cold room 3 Is provided with a forced feeding structure 27 for forcibly feeding the cool air toward the cold / hot storage room 4, and when the warming mode is selected, the heating structure 26 sends warm air to the cold / hot storage room 4. Alternatively, since the cold air is supplied to the cold storage room 4 by the forced supply structure 27, the internal temperature of the cold storage room 4 is lower than a predetermined set temperature in the state where the storage mode is selected. In this case, the inside of the cold / warm room 4 can be heated and controlled by supplying warm air into the cold / hot room 4 by the heating structure 26, and the inside temperature of the cold / warm room 4 is higher than a predetermined set temperature. If it is too high, the forced supply structure 27 supplies the cold air in the refrigerator compartment 3 to the cold storage. The 4 can be controlled cooling.

  As described above, in the showcase according to the present embodiment, the cooling control in the refrigeration mode employs a structure in which the inside of the refrigeration room 4 is cooled by using the cold air in the refrigeration room 3, so the refrigeration room 3 and the refrigeration room Compared to the configuration in which a cooler is installed in each of the chambers 4, the cooling structure of the cold storage room 4 is much simpler, the manufacturing cost is reduced, and the showcase having the cooling capacity in the storage mode is made cheaper Can be provided. Further, the showcase 1 having such a configuration is suitable as a showcase 1 for a lunch box in which the room temperature of the cold / hot storage room 4 is set in a range of 15 to 20 ° C., and is warmed by an air conditioner in winter, for example. Even when the outside air enters the cold storage room 4 and the temperature in the cold storage room 4 rises, the forced supply structure 27 cools the cold storage room 4 by sending cold air into it. The inside of the cabinet and the stored items can be kept at the optimum temperature.

  Further, not only the mode selection lever 36, the damper 24, and the opening / closing mechanism 25 but also the heating structure 26 and the forced feeding structure 27 are provided on the partition wall 2, and all the mode switching structures are centrally arranged on the partition wall 2. Therefore, compared with the case where a switching structure is provided in each of the refrigerator compartment 3 or the refrigerator compartment 4, the loss of the accommodation spaces in the refrigerator compartment 3 and the refrigerator compartment 4 can be reduced, and a larger accommodation space can be secured.

  When the warming mode is selected, the first blower 43 constituting the heating structure 26 is normally on-controlled, and the air in the cold warming chamber 4 is circulated by the air blown by the blower 43. Therefore, the inside of the cold / warm room 4 can be cooled or heated by the forced convection method to cool the inside of the cold / hot room 4 more efficiently.

  The inside of the partition wall 2 is divided into a lower chamber 30 and an upper chamber 31, and a heating bypass passage 42 is disposed so as to straddle the upper and lower chambers 31 and 30, and the first blower 43 is inclined so that the fan shaft faces obliquely upward. Since the posture is installed in the middle of the bypass passage 42, the vertical size of the first blower 43 is reduced as compared with the case where the first blower 43 is in a horizontal posture with the fan shaft facing the vertical direction. And the thickness dimension of the up-down direction of the bypass path 42 for a heating can be made small. This means that the thickness dimension in the vertical direction of the partition wall 2 can be reduced. As a result, the loss of the storage space in the refrigeration room 3 and the cold storage room 4 is reduced, and the capacity of the storage space is increased. Can contribute.

  Ducts 15 and 18 for feeding cold air toward both the chambers 3 and 4 are provided on the side surfaces of the refrigerator compartment 3 and the refrigerator compartment 4 so as to face the duct 18 on the side surface of the upper chamber 31 of the partition wall 2. Since the warm air delivery port 41 and the cold air delivery port 51 are provided, warm air can be sent into the cold storage room 4 using the cold air duct 18. Thereby, the heating structure 26 can be simplified and the manufacturing cost of the showcase 1 can be reduced as compared with the case where a duct for warming is separately provided. In addition, since there are no openings such as the cold air outlet 51 and the warm air outlet 41 on the upper surface of the partition wall 2, the problem of malfunction caused by closing the openings with the stored items hardly occurs. Contributes to improved reliability. Since stored items can be placed on the partition wall 2, the storage space can be increased in capacity.

  The threshold temperatures such as the high temperature threshold and the low temperature threshold in the present invention are not limited to those described in the above embodiments. However, it is preferable that the threshold temperature in the present invention is configured so that the user can appropriately change it according to the type of the object to be accommodated. The configuration of the heater 44 and the like is not limited to that shown in the above embodiment.

DESCRIPTION OF SYMBOLS 1 Showcase 2 Partition wall 3 Cold room 4 Cold / warm room 22 Opening 24 Damper 25 Opening / closing mechanism (damper opening / closing mechanism)
26 Heating structure 27 Forced feeding structure 36 Mode selection lever 42 Bypass path 43 for heating 43 First blower 44 Heater 45 Internal temperature sensor 52 Bypass path 53 for cooling Second blower

Claims (5)

A refrigerator compartment (3), a refrigerator compartment (4), and a partition wall (2) partitioning both chambers (3, 4) are provided, and a mode selection lever (36) provided on the partition wall (2) is provided. In the showcase which can switch the cold storage room (4) between the cold storage mode and the warm storage mode by switching operation,
The partition wall (2) has a cold air opening (22) through which cold air in the refrigerator compartment (3) flows into the cold refrigerator room (4), and a damper that opens and closes the cold air opening (22). (24), an opening / closing mechanism (25) that opens and closes the damper (24) in response to the operation of the mode selection lever (36), and a heating structure for sending warm air toward the cold-storage room (4) (26) and a forced feeding structure (27) for forcibly feeding cold air in the cold storage room (3) into the cold storage room (4). Showcase. The heating structure (26) is open to the cold storage room (4) side and takes in the air in the cold storage room (4) and the air intake (40), and on the cold storage room (4) side. A warm air outlet (41) that opens and sends warm air toward the cold storage room (4), and a heating bypass passage that guides the air taken in from the air intake (40) to the warm air outlet (41) (42), and the heating bypass passage (42) is a first for taking the internal air into the heating bypass passage (42) via the air intake port (40). Fan (43), and a heater (44) that heats the internal air taken from the air intake (40) and warms it, are provided,
The forced feeding structure (27) is opened to the cold storage chamber (3) side to take in cold air, and a cold air intake port (50) to take in cold air, and a cold air supply outlet (open to the cold storage room (4) side to send out cold air ( 51) and a cold air bypass passage (52) for guiding the cold air taken in from the cold air inlet (50) to the cold air outlet (51). The cold air bypass passage (52) The showcase according to claim 1, further comprising a second blower (53) for taking in the cold air from the cold air inlet (50) and sending out the cold air from the cold air outlet (51).   When the warming mode is selected, the first (1) independent of the on / off control of the heater (44) and the on / off control of the second blower (53) constituting the forced feeding structure (27). The showcase according to claim 2, wherein the blower (43) is normally on-controlled, and the air in the cold storage room (4) is circulated by air blown by the blower (43). . The partition wall (2) includes a lower chamber (32) in which a mode changeover switch (32) that is turned on and off in response to operations of the damper (24), the opening / closing mechanism (25), and the mode selection lever (36) is disposed. 30) and an upper chamber (31) in which the heater (44) is disposed, and is partitioned by a partition wall (29),
The heating bypass (42) is configured to straddle the upper and lower chambers (31, 30), avoiding the opening / closing mechanism (25),
The showcase of Claim 2 or 3 with which the 1st air blower (43) is installed in the middle part of the bypass path (42) for the said heating with the inclination attitude | position in which the fan axis | shaft faces diagonally upward. Ducts (15, 18) for sending cold air to both chambers (3, 4) are provided on the side surfaces of the refrigerator compartment (3) and the cold-warm chamber (4),
The warm air outlet (41) and the cold air outlet (51) are provided on the side surface of the upper chamber (31) of the partition wall (2) so as to face the duct (18). 4. The showcase according to 4.

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