JP6236332B2 - Refrigeration equipment - Google Patents

Description

  The present invention relates to a refrigerated storage apparatus that can be stored after refrigerated storage of both hot and cold foods, and then the hot food is reheated and the chilled food is subsequently stored after refrigeration. It is.

Conventionally, as an example of this kind of refrigeration apparatus, the thing of the following patent document 1 is known. This includes a cart with casters for storing trays, and a fixed station that is equipped with a cooling unit and a heating unit and stores the cart so that it can be taken in and out.
More specifically, in the cart, the inside of the cart body made of a heat insulating box with an open / close door is divided into a warm room and a cold room with a heat insulating partition wall, and the hot and cold foods are separated. The trays arranged in such a manner are stored in a plurality of stages in a form extending through the partition wall and extending between the warm room and the cold room.
A first heat exchange chamber equipped with a cooling unit and a heating unit and a second heat exchange chamber equipped with only the cooling unit are partitioned and formed side by side on the ceiling of the station. When the cart is stored in the station, an air circulation path is individually formed between the first heat exchange chamber and the cold storage chamber and between the second heat exchange chamber and the cold storage chamber. ing.

As a usage mode, for example, taking breakfast as an example, hot and cold foods prepared for cooking, etc., are prepared in the evening of the previous day, and each tray is stored in a cart, and then the cart is placed in a station. When the operation is started in this state, the cooling unit is first operated in both heat exchange chambers, and cold air is circulated and supplied to both the hot and cold rooms, so that both hot and cold foods placed on the trays are supplied. Refrigerated storage (chilled storage) (refrigerated mode). When the predetermined time before the breakfast arrangement time, the cooling unit is switched to the heating unit in the first heat exchange chamber, while the cooling unit is continuously activated in the second heat exchange chamber. As hot air is circulated, the hot food is reheated, while the cold food is continuously stored in the cold room (reheating mode). When it is time to serve after the operation is stopped, the cart is pulled out from the station, and the tray is taken out for serving.
It can be similarly applied to lunch and dinner arrangements. However, since the time after the arrangement of the previous meal is short, the refrigeration mode is short and may be omitted.

JP 2011-43310 A

By the way, this kind of refrigeration equipment is operated at intervals, so that off-cycle defrosting is possible when the operation is stopped, but for example, the set temperature during refrigeration storage is low or before breakfast is served Thus, when the refrigeration mode lasts for a long time, the amount of frost formation tends to increase, and there are many cases where the defrosting cannot be completed only by off-cycle defrosting, and an effective countermeasure has been desired.
The present invention has been completed based on the above circumstances, and an object thereof is to enable forced defrosting at an appropriate timing when necessary.

  The present invention comprises a cart body made of an insulated box having an entrance with an open / close door, and a heat insulating partition wall that partitions the inside of the cart body into a warm room and a cold room, and serves hot and cold foods. A cart in which trays that are separately provided penetrate through the partition wall and are stored in a plurality of stages in a form extending between the warm room and the cold room, the cart is stored in a removable manner, and a cooling part and a heating part When the cart is stored in the station, the first heat exchange chamber equipped with the first heat exchange chamber equipped with the cooling unit and the second heat exchange chamber equipped with the cooling unit are formed in the first compartment. An air circulation path formed separately between the second heat exchange chamber and the refrigeration chamber, and an operation control means for controlling the operation of the cooling unit and the heating unit. The cooling unit is operated in both the heat exchange chambers, and the warming chamber The cold air is circulated and supplied to the refrigeration chamber so that both hot and cold foods on the tray are refrigerated and stored in the first heat exchange chamber. On the other hand, in the second heat exchange chamber, the cooling unit is continuously operated, and warm food is reheated by circulating warm air in the warm room, while cold food continues in the cold room. In the refrigerating and refrigerating apparatus capable of performing reheating mode stored refrigerated, a defrosting mode can be performed by continuously disabling the cooling unit for a predetermined time during the refrigerating mode, and Measures the time since the start of the refrigeration mode, and when the measured time reaches the set time, the refrigeration detection means detects the refrigeration for a long time, and the timing when the long-time refrigeration is detected. And a defrosting mode for executing the defrosting mode on the condition that the time calculated by the pre-starting time calculating unit is equal to or longer than a set time. And a control means.

  According to the above configuration, during the refrigeration mode, it is detected that the refrigeration mode has continued for a long time, and there is room in the time before the start of the next reheating mode, that is, it does not suffer from the next reheating mode. Only in timing, the defrost mode which makes a cooling part a non-operation state continuously is performed. In short, forced defrosting during the refrigeration mode is performed at an appropriate timing when necessary, so that the temperature rise in the warming room and refrigeration room due to forced defrosting can be minimized, The refrigerating capacity required for re-cooling can be suppressed and energy saving can be realized.

The following configuration may also be used.
(1) The cooling unit is a cooler connected to a refrigeration apparatus including a compressor, and a temperature sensor that detects the internal temperature of the refrigerator compartment and the refrigerator compartment is provided. In the refrigerator mode, By controlling the operation and stop of the compressor based on a comparison between the refrigerator compartment temperature detected by the temperature sensor and the inside temperature of the refrigerator compartment, and a predetermined set temperature for refrigeration, the A refrigerator operating time integrating means for integrating the operating time of the compressor from the start of the refrigeration mode is provided, wherein the refrigerator compartment and the refrigerator compartment are maintained at a set temperature for refrigeration. At the timing when the defrosting mode is started by the frost control means, if the accumulated time obtained from the compressor operating time integrating means is smaller than the set time, the key for canceling the defrosting mode is canceled. Nseru means is attached.

  If the ambient temperature of the refrigeration system is low or the set temperature for refrigeration is high, it is sufficient to keep the temperature of the cooling section relatively high, so the compressor can be operated for a short time even in the refrigeration mode. It is considered that the amount of frost formation is small, and in such a case, the execution of the defrosting mode is cancelled. The time when forced defrosting is required is more carefully selected, and further energy saving can be achieved.

  (2) The cooling unit is a cooler connected to a refrigeration apparatus including a compressor, and a temperature sensor that detects the internal temperature of the refrigerator compartment and the refrigerator compartment is provided, and in the refrigerator mode, By controlling the operation and stop of the compressor based on a comparison between the refrigerator compartment temperature detected by the temperature sensor and the inside temperature of the refrigerator compartment, and a predetermined set temperature for refrigeration, the In the refrigeration chamber and the refrigeration chamber maintained at the refrigeration set temperature, set temperature reading means for reading the refrigeration set temperature is provided, and the defrost control means executes the defrost mode. If the set temperature value obtained from the set temperature reading means is larger than a reference value at the start timing, a cancel means for canceling the execution of the defrost mode is provided.

  When the set temperature for refrigeration in the refrigeration mode is relatively high, it is considered that the amount of frost formation is small because the temperature of the cooling section is maintained at a relatively high temperature. Execution is cancelled. The time when forced defrosting is required is more carefully selected, and further energy saving can be achieved.

  According to the present invention, forced defrosting can be performed at an appropriate timing when necessary.

1 is an exploded perspective view of a refrigeration apparatus according to Embodiment 1 of the present invention. A longitudinal sectional view of the front view Explanatory drawing which shows the use aspect of a refrigerator-freezer Block diagram of defrost control system Timing chart showing usage pattern Flow chart of defrost control Flowchart of defrost control according to Embodiment 2 Flowchart of defrost control according to Embodiment 3

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. The entire structure of the refrigeration apparatus of this embodiment will be described with reference to FIGS. 1 and 2. The cold storage apparatus includes a cart 10 for storing the tray X and a station 30 for storing the cart 10 so that the cart 10 can be taken in and out.
The cart 10 further includes a cart body 11 formed of a heat insulating box and a frame cart 20 that stores the tray X. Both the front and rear sides of the cart body 11 are opened, and a double-spread type heat insulating door 12 is mounted in each opening 11A. A caster 13 is provided on the bottom surface of the cart body 11.

The frame cart 20 has a structure in which a metal frame 23 is raised from the left and right side edges of the bottom plate 21 provided with casters 22, and can be inserted into and removed from the cart body 11 from the front side. A heat insulating partition wall 24 is provided in a substantially central portion in the left-right direction of the frame cart 20 over the entire front-rear direction. The partition wall 24 has a shape in which a plurality of unit partition walls 24A are stacked, and the tray X is stored in a plurality of stages while penetrating between the upper and lower unit partition walls 24A from both front and rear surfaces. Yes.
In the state in which the frame cart 20 is stored in the cart body 11, as shown in FIG. 2, the interior of the cart body 11 is divided into left and right by a partition wall 24, and a warming room 25H is on the left side of the partition wall 24 and on the right side. A refrigerator compartment 25C is formed.

The station 30 has a substantially box shape whose front is opened, and the cart 10 can be taken in and out through the opening. A first heat exchange chamber 31 and a second heat exchange chamber 32 are partitioned and formed side by side on the ceiling portion of the station 30, and the left first heat exchange chamber 31 is arranged above the warming chamber 25 </ b> H. Is provided with a cooler 33 serving as a cooling unit and a heater 34 serving as a heating unit, and the right second heat exchange chamber 32 disposed above the refrigerator compartment 25C has a cooler 33 serving as a cooling unit. Only provided. Both heat exchange chambers 31 and 32 are provided with circulation fans 35, respectively.
Both coolers 33 are connected in parallel to a refrigeration apparatus 37 including a compressor 38 and the like installed in the machine room 36 of the station 30 via an on-off valve.

  When the cart 10 is stored in the station 30, the first heat exchange chamber 31 is circulated between the first heat exchange chamber 31 and the warm storage chamber 25H by drawing the air in the cabinet from the ceiling of the warm storage chamber 25H. As a result, a first air circulation path 41 is formed so that the air exchanged by the air is driven from the side surface of the warm room 25H, and the cold room 25C is provided between the second heat exchange room 32 and the cold room 25C. A second air circulation path 42 is formed in which air that has been heat-exchanged is drawn from the side surface of the refrigerator compartment 25C by drawing the interior air from the ceiling and circulating the air in the second heat exchange chamber 32.

  An example of the usage pattern of the refrigeration apparatus of this embodiment is demonstrated with reference to FIG. First, hot food and cold food prepared for cooking and the like are divided and arranged in trays X, each tray X is stored in a frame cart 20, and the cart 10 is configured by storing the frame cart 20 in a cart body 11. (Laying process). Next, when the cart 10 is placed in the station 30 and the operation switch is turned on, the refrigeration mode is executed first. In the refrigeration mode, the cooler 33 is activated in both the heat exchange chambers 31 and 32, and cold air is circulated and supplied to both the refrigeration chamber 25H and the refrigeration chamber 25C. And cold food are refrigerated (chilled). More specifically, in this refrigeration mode, the internal temperature is detected by the temperature sensors 43H and 43C in the refrigerator compartment 25H and the refrigerator compartment 25C, respectively, and the detected temperature is compared with the set temperature, and based on the comparison. The operation of the coolers 33 in the heat exchange chambers 31 and 32 corresponding to the chambers 25H and 25C is controlled in accordance with the on / off switching of the on-off valves and the on / off switching of the compressor 38, and the warming chamber 25H The internal temperature of the refrigerator compartment 25C is maintained at a substantially set temperature.

When it reaches a predetermined time (set by a 24-hour timer) calculated backward from the distribution time of lunch, the mode is switched to the reheating mode. In the reheating mode, the first heat exchange chamber 31 switches to the operation of the heater 34, while the second heat exchange chamber 32 maintains the state where the cooler 33 is continuously operated. Thus, warm air is circulated in the warm room 25H and the hot food is reheated, while cold air is continuously circulated and supplied to the cold room 25C for chilled storage.
When the predetermined time elapses and the serving time is reached, the reheating mode is finished and the operation switch is turned off. Then, the cart 10 is pulled out from the station 30, and the tray X is taken out and used for serving. When the arrangement is finished, only the frame cart 20 is left at the arrangement place and used for lowering.

The refrigeration apparatus of the present embodiment is configured to be operated when necessary as described above, and so-called off-cycle defrosting is possible when the operation is stopped, but for example, the set temperature during refrigeration storage is low. When the refrigeration mode lasts for a long time, such as before serving breakfast, the amount of frost formation tends to increase, and there are cases where defrosting cannot be achieved by off-cycle defrosting alone.
On the other hand, in this embodiment, the means which can perform forced defrost at an appropriate timing is required. The forced defrosting in the present embodiment is performed by continuously stopping the compressor 38 for a predetermined time during execution of the refrigeration mode. In addition, for example, when the forced defrosting is performed during execution of the reheating mode, the cooling room 25C is not cooled during that time, and therefore, the appropriate timing is affected by the temperature of the adjacent storage room 25H. This is a timing at which there is no possibility of causing such a problem because the room temperature may be raised due to the above.

In the present embodiment, as shown in FIG. 4, a control system for executing forced defrosting is constructed.
The control system is provided with a defrost control unit 50 that includes a microcomputer and can execute a predetermined program. Connected to the input side of the defrost control unit 50 are a mode identifying unit 51 for identifying which of the refrigeration mode and the reheating mode is being executed, and a time setting unit 52 for setting the serving time.
On the other hand, a compressor control unit 53 provided with a first timer 54 is connected to the output side.

The defrost control unit 50 includes a reheating time storage unit 55, a long-time refrigeration detection unit 56, a pre-start time calculation unit 57, and a second timer 58.
The reheating time storage unit 55 functions to calculate and store the start time of the reheating mode related to each serving based on the serving time input from the time setting unit 52.
The long-time refrigeration detection unit 56 measures the execution time of the refrigeration mode by the second timer 58, and when the measurement time reaches a predetermined set time H2 (for example, 4 hours), “long-time refrigeration” It detects a certain thing and outputs a detection signal.
The pre-start time calculation unit 57 calculates the time until the corresponding reheating mode is started at the timing when “long-time refrigeration” is detected by the long-time refrigeration detection unit 56, and calculates the calculated “pre-start time Is a set time H3 (for example, 2 hours) or longer, a defrost signal is output to the compressor control unit 53.
Upon receiving the defrost signal, the compressor control unit 53 functions to forcibly stop the operation of the compressor 38 for a predetermined time H1 (for example, 1 hour) set in the first timer 54. .

Next, an example of the operation of the present embodiment will be described based on the timing chart of FIG. 5 and the flowchart of FIG.
In this embodiment, as shown in FIG. 5, the case where it applies to all three meals of breakfast, lunch, and dinner is illustrated. The serving time is set at 7am for breakfast, 11:30 for lunch, and 17:30 for dinner. Therefore, the start time of the reheating mode corresponding to each meal is 5:30, 10:00 and 16:00, 1 hour and 30 minutes before each serving time, and is stored in the reheating time storage unit 55. .

  As shown in FIG. 5, the use form of the refrigeration apparatus for one day (24 hours) starts from 0 o'clock (continues from the previous night), refrigeration mode Ba for breakfast (0 o'clock-5:30), for breakfast Reheating mode Bb (5: 30-7 o'clock), unused Off (7: 30-9: 30), refrigeration mode La for lunch (9: 30-10 o'clock), lunch reheating mode Lb (10 Hours-11: 30), Unused Off (11: 30-14: 00), Refrigeration mode Sa for dinner (14: 00-16: 00), Reheating mode for dinner Sb (16: 00-17: 30), Unused Off (17: 30-18: 00), (next day) Breakfast refrigeration mode Ba (18: 00-24: 00 (0 o'clock)).

  Under such a usage pattern, the mode of defrosting control will be described with reference to the flowchart of FIG. In preparing breakfast, at 18:00 of the previous day, after storing the cart 10 containing the tray X with lunch (hot and cold) in the station 30, the refrigeration mode Ba is turned on. Is started, and a program for defrosting control is executed. When the program is started and it is confirmed that the refrigeration mode Ba is executed (step S10 is “YES”), the second timer 58 starts measuring the execution time of the refrigeration mode Ba and sets the refrigeration time. Until the time H2 (4 hours) is reached (step S11 is “NO”), the time measurement is continued on the condition that the reheating mode Bb is not entered (step S12 is “NO”).

At the timing t1 (22:00) when 4 hours have elapsed since the start of the refrigeration mode Bb (step S11 is “YES”), a “long-time refrigeration” detection signal is output, and in step S13, the above timing is reached. The time until the start of the next reheating mode Bb at t1 (pre-start time) is calculated, and then in step S14, it is determined whether the “pre-start time” is equal to or longer than the set time H3 (2 hours).
At this timing t1, it is determined that the “pre-start time” is equal to or longer than the set time H3 (2 hours) (step S14 is “YES”), and a defrost signal is issued. Thereby, after the 2nd timer 58 is reset, defrost mode Def is started in step S15 (22:00). When the defrosting time H1 (1 hour) set in the first timer 54 has elapsed (step S16 is “YES”), the defrosting mode Def ends in step S17 (23:00), and the first timer 54 is reset. Then, the process returns to step S10.

When the defrost mode Def ends, the process returns to the refrigeration mode Ba, and the same control as described above is performed. That is, at timing t2 (3 o'clock) when 4 hours have elapsed since resumption of the refrigeration mode Ba (step S11 is “YES”), the time until the start of the reheating mode Bb at this timing t2 (pre-start time) is In step S14, it is determined whether or not the set time H3 (2 hours) or more is present. At this timing t2, the "pre-start time" is still more than the set time H3 (2 hours). Until the time, the second defrosting mode Def is executed.
When the second defrosting mode Def ends, the refrigeration mode Ba is returned again and then the reheating mode Bb is switched. On the program, it is recognized that the reheating mode Bb has been switched during the measurement of the execution time of the refrigeration mode Ba in step S11 (step S12 is “YES”), and the program is terminated.

In preparation for lunch, at 9:30 on that day, the cart 10 storing the tray X with the meals stored therein is stored in the station 30, and the operation switch is turned on to start the refrigeration mode La. At the same time, a program for defrosting control is executed.
In the case of lunch, since the refrigeration mode La is switched to the reheating mode Lb 30 minutes after the start of the refrigeration mode La, in the program, the reheating mode is being measured while the execution time of the refrigeration mode La is being measured in step S11. It is recognized that the switch has been made to Lb ("YES" in step S12), and the program is terminated. As a result, the defrosting mode is not executed.

In preparing for dinner, at 14:00 on the day, the cart 10 storing the tray X with lunch was stored in the station 30, and the operation switch was turned on to start the refrigeration mode Sa. A program for defrosting control is executed.
In the case of dinner, since the refrigeration mode Sa is switched to the reheating mode Sb after two hours have passed since the start of the refrigeration mode Sa, the reheating is performed while measuring the execution time of the refrigeration mode Sa in step S11 on the program. It is recognized that the mode has been switched to the mode Sb (step S12 is “YES”), and the program is terminated. Similarly, the defrosting mode is not executed.
In the case of the usage example illustrated in FIG. 5, the defrosting mode Def is executed twice only when the refrigeration mode Ba for breakfast is executed.

Depending on the mode of use, when preparing one meal, the refrigeration mode is continued for 4 hours or more (including resumption), but at the timing when 4 hours have passed, it may take 2 hours before switching to the reheating mode. possible.
In this case, step S14 for determining whether or not the “pre-start time” in the program is equal to or longer than the set time H3 (2 hours) becomes “NO”, and the program ends. That is, the defrosting mode is not executed at the above timing.

  In preparation for one meal, if the time after the arrangement of the previous meal is short, the reheating mode may be immediately executed without executing the refrigeration mode. In that case, since the execution of the refrigeration mode is not recognized after the program is started in FIG. 6 (step S10 is “NO”), the process cannot proceed to the next step S11, and as a result, the defrost mode is not executed.

As described above, according to the present embodiment, when it is considered that the amount of frost on the cooler 33 is large, such as when the refrigeration mode is executed for a long time prior to the reheating mode, Forcible defrosting is appropriately performed in the middle of the refrigeration mode. Therefore, when the mode is switched to the reheating mode, frost formation on the cooler 33 is kept small. Therefore, it is possible to efficiently cool on the side of the refrigerating room 25C where the refrigerating capacity is more required, and on the other hand, on the side of the refrigerating room 25H, it is possible to suppress the amount of circulation of steam.
In addition, since the defrosting mode is performed at a timing that is not incurred when the reheating mode is performed, a problem that the cooling operation is delayed particularly in the refrigerator compartment 25C side can be avoided.
In short, since forced defrosting during the refrigeration mode is performed at an appropriate timing when necessary, the temperature rise in the warming room 25H and the cold room 25C due to forced defrosting is minimized. Therefore, the refrigerating capacity required for recooling can be suppressed, and energy saving can be realized.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS.
In the refrigeration mode, as described above, the internal temperature is detected in the refrigerator compartment 25H and the refrigerator compartment 25C, and the detected temperature is compared with the set temperature. With the on / off switching of the compressor 38, the operation and non-operation of the coolers 33 of the heat exchange chambers 31 and 32 corresponding to the respective chambers 25H and 25C are controlled, and the internal temperatures of the warm room 25H and the cold room 25C are controlled. The set temperature is maintained.
Here, when the ambient temperature of the refrigeration apparatus is low or the set temperature in the refrigerator is high, it is sufficient to maintain the temperature of the cooler 33 at a relatively high temperature. As a result, the amount of frost formation is thought to be small.

  In this embodiment, in view of the above points, in the defrost control system shown in the first embodiment, at the timing when the defrost mode is started in the middle of the refrigeration mode, the operation time of the compressor 38 during that time is integrated. If the value is equal to or shorter than the set time, a function for canceling the defrosting mode is provided.

Therefore, as shown in FIG. 4, a compressor operating condition detection unit 60 is additionally connected to the input side of the defrost control unit 50, and the defrost control unit 50 starts a refrigeration mode ( An integration timer 61 that integrates the operation time of the compressor 38 from when the "refrigeration for a long time (4 hours)" is detected until the "long-time refrigeration (4 hours)" is detected; In the following cases, a first cancel unit 62 that cancels the execution of the defrost mode is additionally provided.
As shown in FIG. 7, as a program, step S20 for determining whether or not the “compressor accumulated operation time” is equal to or less than the set time H4 is interposed between step S14 and step S15. If S20 is “NO”, the process proceeds to step S15, and if “YES”, the process returns to step S10.

Therefore, when “refrigeration for a long time” is detected (step S11 is “YES”) and the “pre-start time” until the start of the next reheating mode is 2 hours or more (step S14 is “YES”). As a further condition, the “compressor accumulated operation time” is compared with the set time H4 in step S20. If the “compressor operation accumulated time” is equal to or shorter than the set time H4 (step S20 is “YES”), the process returns to step S10 without starting the defrosting mode, and the “compressor operation accumulated time” is set. For the first time in less than time H4, the defrosting mode is started in step S15.
According to the second embodiment, the time when forced defrosting is required is more carefully selected, and further energy saving can be achieved.

<Embodiment 3>
A third embodiment of the present invention will be described with reference to FIGS.
This Embodiment 3 is based on the knowledge that when the set temperature for refrigeration in the refrigeration mode is relatively high, the temperature of the cooler 33 is maintained at a relatively high temperature, so that the amount of frost formation will be small. Has been made.
Therefore, in this embodiment, in the defrost control system shown in Embodiment 1, the set temperature for refrigeration is confirmed at the timing when the defrost mode is started in the middle of the refrigeration mode, and the set temperature for refrigeration is the reference. If the temperature is equal to or higher than T (8 ° C.), the function of canceling the defrosting mode is provided.

Therefore, as shown in FIG. 4, a refrigeration temperature setting unit 65 for inputting a set temperature for refrigeration is additionally connected to the input side of the defrost control unit 50 in place of the compressor operating state detection unit 60. In addition, in the defrosting control unit 50, instead of the integration timer 61 and the first cancellation unit 62, a set temperature reading unit 66 that reads the set temperature for refrigeration, and the read set temperature is the reference temperature T (8 ° C. ) In the above case, a second canceling unit 67 for canceling the execution of the defrosting mode is additionally provided.
As shown in FIG. 8, as a program, step S30 for determining whether or not the set temperature for refrigeration is the reference temperature T is interposed between step S14 and step S15, and the step S30 is “NO”. "" Proceeds to step S15, and if "YES", the program ends.

Therefore, when refrigeration for a long time is detected (step S11 is “YES”) and the “pre-start time” until the start of the next reheating mode is 2 hours or more (step S14 is “YES”), As a condition, “set temperature for refrigeration” is compared with the reference temperature T in step S30. Here, if the “set temperature for refrigeration” is equal to or higher than the reference temperature T (“YES” in step S30), the program is terminated without executing the defrost mode, and the “set temperature for refrigeration” is set to the reference temperature T. For the first time, the defrosting mode is started in step S15.
Also in the third embodiment, the time when forced defrosting is required is more carefully selected, and further energy saving can be achieved.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the said embodiment, although 1 hour was illustrated as time to perform a defrost mode in refrigeration mode, the same time can be arbitrarily selected as about 2 hours at the longest.
(2) The time for detecting “long-time refrigeration” is not limited to the four hours exemplified in the above embodiment, and can be appropriately adjusted according to conditions such as the size of the cooler to be equipped and the temperature of the installation location. Is.
(3) In Embodiment 3, the reference temperature of the set temperature for refrigeration selected to cancel the defrosting mode is not limited to 8 ° C. as illustrated, and other appropriate temperatures can be selected.

(4) In the above embodiment, the case where the refrigeration / heating apparatus is used at the time of serving all three meals is illustrated, but the present invention is also applicable when used at the time of serving any two meals or one meal among the three meals. The invention is equally applicable.
(5) The present invention can be similarly applied to a refrigeration apparatus using a cart of a type in which a cart body is directly partitioned into a refrigeration room and a refrigeration room without providing a frame cart. is there.

  X ... Tray 10 ... Cart 11 ... Cart body 11A ... Opening (entrance / exit) 12 ... Insulated door (opening / closing door) 20 ... Frame cart 24 ... Partition wall 25H ... Warm room 25C ... Refrigerating room 30 ... Station 31 ... First heat Exchange chamber 32 ... second heat exchange chamber 33 ... cooler (cooling part) 34 ... heater (heating part) 35 ... circulation fan 41, 42 ... air circulation path 50 ... defrost control part (defrost control means) 51 ... mode Identification unit 52 ... Time setting unit 53 ... Compressor control unit 54 ... First timer 55 ... Reheating time storage unit 56 ... Long-time refrigeration detection unit 57 ... Pre-start time calculation unit 58 ... Second timer 60 ... Compressor operation status Detection unit 61 ... Integration timer 62 ... First cancel unit 65 ... Refrigeration temperature setting unit 66 ... Set temperature reading unit 67 ... Second cancel unit

Claims (3)

It has a cart body made of heat-insulated box with an entrance with an open / close door, and a heat-insulating partition wall that divides the cart body into a warm room and a cold room. A cart in which a tray passes through the partition wall and is stored in a plurality of stages in a form extending between the warm room and the cold room;
A station in which the cart is detachably stored, a first heat exchange chamber equipped with a cooling unit and a heating unit, and a second heat exchange chamber equipped with a cooling unit are partitioned and formed;
When the cart is stored in the station, an air circulation path is formed separately between the first heat exchange chamber and the warm room and between the second heat exchange chamber and the cold room. When,
An operation control means for controlling the operation of the cooling unit and the heating unit is provided,
The cooling unit is operated in both the heat exchange chambers, and cold air is circulated and supplied to both the warm room and the cold room, so that both hot and cold foods on the tray are kept cold. When,
While the cooling unit is switched from the cooling unit to the heating unit in the first heat exchange chamber, the cooling unit is continuously operated in the second heat exchange chamber, and warm air is circulated in the warming chamber. In the refrigerating and refrigerating apparatus capable of performing the reheating mode in which the refrigerating food is reheated while the refrigerating food is continuously refrigerated and stored in the refrigerating room side
While the refrigeration mode can execute the defrost mode by making the cooling unit inactive for a predetermined time continuously,
A long-time refrigeration detection means for measuring the time from the start of the refrigeration mode and detecting that the refrigeration is for a long time when the measurement time reaches a set time;
A pre-start time calculating means for calculating a time before the start of the reheating mode at the timing when the long-time refrigeration is detected;
Defrosting control means for executing the defrosting mode on condition that the time calculated by the pre-start time calculating means is a set time or more;
The refrigeration apparatus characterized by comprising. The cooling unit is a cooler connected to a refrigeration apparatus including a compressor, and a temperature sensor that detects the internal temperature of the refrigerator compartment and the refrigerator compartment is provided,
In the refrigeration mode, operation and stop of the compressor are controlled based on a comparison between the temperature in the refrigerator compartment and the temperature compartment detected by the temperature sensor and a preset temperature for refrigeration. In what the refrigeration room and the warm room are maintained at the set temperature for refrigeration,
Compressor operating time integrating means for integrating the compressor operating time from the start of the refrigeration mode is provided,
If the accumulated time obtained from the compressor operation time integrating means is smaller than a set time at the timing when the defrost control means starts executing the defrost mode, the execution of the defrost mode is canceled. The refrigeration / heating apparatus according to claim 1, further comprising canceling means for performing the operation. The cooling unit is a cooler connected to a refrigeration apparatus including a compressor, and a temperature sensor that detects the internal temperature of the refrigerator compartment and the refrigerator compartment is provided,
In the refrigeration mode, operation and stop of the compressor are controlled based on a comparison between the temperature in the refrigerator compartment and the temperature compartment detected by the temperature sensor and a preset temperature for refrigeration. In what the refrigeration room and the warm room are maintained at the set temperature for refrigeration,
A set temperature reading means for reading the set temperature for refrigeration is provided;
If the set temperature value obtained from the set temperature reading unit is larger than a reference value at the timing when the defrost control unit starts executing the defrost mode, the execution of the defrost mode is canceled. The refrigeration apparatus according to claim 1, further comprising a canceling unit.

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