JP2009192151A - Cooling storage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling storage, precisely giving a warning for temperature abnormality in a storage. <P>SOLUTION: In this cooling storage, a cooling operation for cooling the temperature Td1 in a storage room to a preset cooling temperature Tc and a cold reserving operation continues from the cooling operation for keeping the temperature in the storage room to a preset cold reserving temperature Th are performed. A control device performs detection and warning for temperature abnormality in the storage room individually during the cooling operation and during the cold reserving operation. The control device gives a warning for high temperature when the temperature in the storage room does not drop by a predetermined amount within a predetermined time (corresponding to the time t0-t1) until the temperature in the storage room reaches from the cooling start temperature to a neighborhood (1°C) of the preset cooling temperature during the cooling operation, and then does so when a higher temperature (9°C) than the preset cooling temperature Tc by a predetermined value continues for a predetermined time (corresponding to the time t1-t2). During the cold reserving operation, the control device gives such warning when the temperature in the storage room continues to be higher (13°C) than the preset cold reserving temperature Th by a predetermined value (from the time t2 on). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a refrigerator that performs a cooling operation and a cold-retaining operation in succession, and more particularly to detection of an abnormality in the cooling temperature.

  The technique regarding the refrigerator which performs such a cooling operation and a cold-retaining operation continuously is described in patent document 1, for example. At that time, normally, two temperatures, a set temperature during the cooling operation and a set temperature during the cool operation, are set, and the cooler is used under the condition of the set temperature in the cool chamber ≦ the set temperature in the cool chamber.

  Under such usage conditions, a high temperature alarm is issued when the inside of the refrigerator is not cooled even though an operation command is issued to the refrigeration circuit of the refrigerator. Generally, a high temperature alarm is issued when the temperature of “cooling chamber set temperature + predetermined temperature (for example, 10 ° C.)” continues for a predetermined time, for example, 120 minutes.

On the other hand, if the inside of the refrigerator is overcooled even though no operation command is issued to the refrigeration circuit, a low temperature alarm is issued. Generally, a low temperature alarm is issued when the temperature of “set temperature in cooling chamber—predetermined temperature (for example, 5 ° C.)” continues for a predetermined time, for example, 60 minutes.
JP 2000-249447 A

  However, because high temperature foods are put in the refrigerator, the interior may be in a high temperature state, or the time to reach the set temperature during cooling is indefinite depending on the amount of load to be cooled. In the conventional method of issuing a high temperature alarm, there is a possibility that the high temperature alarm is unnecessarily issued. Also, if the difference between the set temperature in the refrigerator during cooling and the set temperature in the refrigerator during cold storage is large, even if the temperature in the refrigerator drops more than necessary during the cold storage operation, There was a risk that the low temperature alarm would not be issued accurately.

  This invention is completed based on the above situations, Comprising: It aims at providing the refrigerator which can perform the alarm of the temperature abnormality in a store | warehouse | chamber exactly.

  The present invention is based on a storage chamber for storing an object to be cooled, a cooling device for cooling the storage chamber, an internal temperature sensor for detecting the temperature of the storage chamber, and a detection temperature of the internal temperature sensor, A cooling device that detects a temperature abnormality related to the cooling abnormality of the storage chamber and alarms the temperature abnormality, and uses the cooling device to cool the temperature of the storage chamber to a set cooling temperature; In a refrigerator that performs a cooling operation to maintain a temperature of the storage chamber at a set cold storage temperature following the cooling operation, the alarm control device detects and detects an abnormality in the temperature of the storage chamber during the cooling operation. It is characterized in that it is performed individually during the cold insulation operation.

  According to this configuration, the control device individually detects and alarms the temperature abnormality of the storage chamber during the cooling operation and during the cold insulation operation. Therefore, even when the temperature transition of the storage chamber is different between the cooling operation and the cold storage operation, and the control mode is different, it is possible to accurately detect and alarm the temperature abnormality in the storage.

The following configuration may also be used.
(1) During the cooling operation, the control device does not decrease the temperature of the storage chamber by a predetermined amount within a predetermined time until the temperature of the storage chamber reaches from the cooling start temperature to the vicinity of the set cooling temperature. In this case, and after the temperature of the storage chamber reaches around the set cooling temperature, a high temperature alarm is given when the temperature is kept at a predetermined temperature higher than the set cooling temperature for a predetermined time. When the temperature of the storage room continues for a predetermined time at a temperature higher than the set cold temperature, a high temperature alarm is issued.

  According to this configuration, in response to the temperature transition of the storage room, during the cooling operation, the temperature of the storage room is changed from the cooling start temperature to the vicinity of the set cooling temperature. The high temperature alarm is given separately after the temperature has been reached, and the high temperature alarm is given in a different manner from the cooling operation during the cold insulation operation. For this reason, it is possible to accurately detect and warn of a high temperature abnormality (temperature abnormality) in the storage corresponding to the temperature transition of the storage chamber from the cooling operation to the cold insulation operation.

  (2) During the cooling operation, the control device issues a low temperature alarm when the temperature of the storage chamber continues for a predetermined time at a temperature lower than the set cooling temperature, and during the cooling operation, The temperature of the storage chamber continues for a predetermined time at a temperature lower than the set cooling temperature until the temperature of the storage chamber reaches the set cool temperature around the set cooling temperature, and the temperature of the storage chamber After reaching the set cool temperature, the low temperature alarm is issued when the temperature of the storage room continues for a predetermined time at a temperature lower than the set cool temperature.

  According to this configuration, it is possible to accurately detect and warn of a low temperature abnormality (temperature abnormality) in the storage corresponding to the temperature transition of the storage chamber from the cooling operation to the cold insulation operation. Therefore, even if there is a large difference between the set temperature in the refrigerator during cooling and the set temperature in the refrigerator during cold storage, and it takes time to increase the temperature in the refrigerator during cold storage, an unnecessarily low temperature alarm is issued. It is prevented. In addition, even when the temperature in the refrigerator drops more than necessary during the cold storage operation, for example, based on the difference between the set temperature in the refrigerator during cold storage and the temperature detected by the internal temperature sensor, the low temperature abnormality in the refrigerator can be accurately detected. Can detect and alarm.

(3) During the cooling operation, the control device does not lower the temperature of the storage chamber by a predetermined amount within a predetermined time until the temperature of the storage chamber reaches from the cooling start temperature to the vicinity of the set cooling temperature. In this case, and after the temperature of the storage chamber reaches around the set cooling temperature, if the temperature continues for a predetermined time at a temperature higher than the set cooling temperature, a high temperature alarm is given, and the temperature of the storage chamber When the temperature is lower than the set cooling temperature by a predetermined temperature for a predetermined time, a low temperature alarm is issued, and during the cold insulation operation, the temperature of the storage room is continued for a predetermined time at a temperature higher than the set cold temperature. The temperature of the storage chamber is lower than the set cooling temperature by a predetermined temperature until the temperature of the storage chamber reaches from the set cooling temperature to around the set cool temperature. When the temperature of the storage chamber reaches the set cool temperature, and the temperature of the storage chamber continues for a predetermined time at a temperature lower than the set cool temperature. Execute a low temperature alarm.
According to this configuration, it is possible to accurately detect and warn of a low temperature abnormality and a high temperature abnormality (temperature abnormality) in the storage corresponding to the temperature transition of the storage room from the cooling operation to the cold insulation operation.

  ADVANTAGE OF THE INVENTION According to this invention, the alarm of the temperature abnormality in a refrigerator can be performed exactly.

<Embodiment>
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In this embodiment, the case where the refrigerator of the present invention is applied to a rapid refrigerator is illustrated.
1. Configuration of Rapid Cooling Chamber FIG. 1 is a schematic front view of a rapid cooling cabinet 10 according to an embodiment of the present invention. FIG. 2 is a schematic block diagram relating to a configuration for alarming a temperature abnormality in the rapid cooling box 10.

  First, the overall structure of the rapid cooling box 10 will be described with reference to FIG. 1. A cooling box body 10A made of a heat insulating box is placed on the upper surface of the machine room 10B, and a heat insulating door (not shown) can be opened and closed at the front opening. It is attached to. The right side of the main body 10 </ b> A viewed from the front is the storage room 11 for the food F to be cooled, and the left side is the installation room for the cooler 21 and the two cooling fans 22. In the storage chamber 11, a pair of left and right tray receivers are arranged to face each other, and the trays containing the food F are stored in a plurality of stages so as to be able to be taken in and out.

  The cooler 21 is circulated and connected by a refrigeration apparatus (not shown) and a refrigerant pipe (not shown) installed in the machine room 10B, and a known refrigeration circuit 20 is formed. The cooling fan 22 and the refrigeration circuit 20 correspond to the “cooling device” of the present invention.

  Therefore, when the refrigeration apparatus and the cooling fan 22 are driven, cool air is generated while the air in the storage chamber 11 passes through the cooler 21 from the front (surface facing the storage chamber) and blown out from the back side. A circulatory flow in which the cold air hits the left side wall in the cabinet, splits into the front and back and wraps around the front and back side surfaces of the cooler 21, and then a part of the cool air is sent to the storage room while flowing to the right side wall. It has come to produce.

  An internal temperature sensor 31 for detecting the internal temperature Td1 of the storage chamber 11 is provided on the back side of the cooler 21, and the internal temperature is controlled as will be described in detail later. It has come to be used. Further, a core temperature sensor 32 is provided, and this core temperature sensor 32 is inserted into the stored food F and detects the core temperature (internal temperature) Td2 of the food. When the core temperature sensor 32 is not used for core temperature detection, for example, the core temperature sensor 32 is stored in a storage portion (not shown) provided on the front surface of the cooler 21, for example.

  In addition, an operation panel 12 disposed at the upper front of the machine room is provided, and various temperatures used for cooling processing of the storage chamber 11 are set through the operation panel 12. The operation panel 12 is provided with an alarm buzzer 13 as an alarm device for alarming a temperature abnormality in the storage chamber 11. Note that the alarm device is not limited to an alarm buzzer, and may be, for example, an alarm lamp, or both an alarm buzzer and an alarm lamp. The setting of various temperatures is not limited to being set by the operation panel 12, and may be set by remote control using a remote control device or the like, for example.

  Further, as shown in FIG. 2, the rapid cooling box 10 includes a control device 40 that detects a temperature abnormality in the storage chamber and warns the temperature abnormality through an alarm device. For example, the control device 40 is disposed on the back side of the operation panel 12.

  The control device 40 includes a CPU 41, a memory unit 42, and a timer unit 43. The memory unit 42 includes a ROM, RAM, NV (nonvolatile) RAM, and the like, and various programs executed by the CPU 41 are stored in the ROM. In the RAM, data related to various processes is temporarily stored. The timer unit 43 includes a plurality of timers, and includes a 2-minute timer, a 30-minute timer, a 60-minute timer, a 120 timer, and the like.

  As shown in FIG. 2, an operation panel (temperature setting input unit) 12, an alarm device 13, a refrigeration circuit 20 (cooling device), an internal temperature sensor 31, a core temperature sensor 32, and the like are connected to the control device 40. Has been. The control device 40 turns the refrigeration circuit 20 that is one of the cooling devices on and off based on the detected internal temperature Td1 from the internal temperature sensor 31 and the detected core temperature Td2 from the core temperature sensor 32, thereby storing the refrigerator. The internal temperature (Td1) is controlled to a predetermined temperature. Further, when an abnormality in the internal temperature (Td1) is detected based on the detected internal temperature Td1, control is performed to issue an alarm to the outside via the alarm buzzer 13.

In the rapid cooler 10 of this embodiment having such a configuration, the following two types of operation modes (during operation) are executed as operation modes related to the cooling operation.
The first is the “cooling operation mode”. In the “cooling operation mode”, the operation of the refrigeration system is performed based on the comparison between the internal temperature Td1 detected by the internal temperature sensor 31 and the internal temperature setting Tc during cooling. By performing the control, the cooling operation for cooling the storage chamber to the set temperature Tc at the time of cooling is continuously performed.

  The second is the “cold operation mode”. In the “cooling operation mode”, the core temperature Td2 of the food F is detected by the core temperature sensor 32, and the cooling operation is terminated when the core temperature is lowered to a preset temperature Ts of the core temperature sensor. This is the mode that follows. In the “cooling operation mode”, storage is performed by controlling the operation of the cooling device based on a comparison between the internal temperature Td1 detected by the internal temperature sensor 31 and a predetermined internal temperature Th during the cold storage. The chamber 11 is substantially maintained at the set temperature Th in the cold storage. In addition, as an operation method that does not use the core temperature sensor 32, there is a method in which the cooling operation is performed for a predetermined cooling set time, and then the cold operation mode is set.

  Here, the set temperature Ts of the core temperature sensor can be set in the range of “−30 ° C. to 30 ° C.”, for example, and is set to “3 ° C.” in this example. The cool-in-chamber set temperature Tc is normally set to a temperature several degrees lower than the set temperature Ts of the core temperature sensor described above, and can be set in a range of “−40 ° C. to 30 ° C.”, for example. It is set to “−1 ° C.”. The set temperature Th during the cold storage is normally set to a temperature equal to or higher than the set temperature Tc during the cooling, and can be set within a range of, for example, “−40 ° C. to 30 ° C.”. It is set to “3 ° C.” in the same way as the temperature setting temperature Ts of the temperature sensor.

Then, the effect | action which concerns on the alarm of the temperature abnormality of this embodiment is demonstrated.
2. High Temperature Alarm Processing First, the high temperature alarm processing according to the present embodiment will be described with reference to FIGS. 3 to 5 are flowcharts related to the high temperature alarm process, and FIG. 6 is a time chart showing the temperature transition of the rapid cooling box 10. Note that the scaling of the vertical axis (temperature) in FIG. 6 is approximate. The control device 40, specifically, the CPU 41 executes this high temperature alarm process according to a program stored in the ROM of the memory 42, for example.

2.1 High temperature alarm during freezing operation First, in step S101, the CPU 41 resets all timers of the timer unit 43. In addition, the detection temperature Td1 (hereinafter referred to as “detection internal temperature”) of the internal temperature sensor 31 is received from the internal temperature sensor 31, and the detection internal temperature Td1, specifically, the temperature data (hereinafter the same) is stored in the memory 42. Is stored in a predetermined area “Temp1” in the RAM. Next, in step S102, the temperature zone to which the detected internal temperature Td1 belongs is determined, and the 30-minute timer of the timer unit 43 corresponding to all the temperature zones to which the detected temperature Td1 belongs is started.

  For example, each temperature zone has a temperature zone width of 10 ° C, and every 1 ° C, 200 ° C to 190 ° C, 199 ° C to 189 ° C, 198 ° C to 188 ° C, ... 70 ° C to 60 ° C. It is assumed that the temperature is set such as 69 ° C to 59 ° C, 68 ° C to 58 ° C, 2 ° C to -8 ° C, 1 ° C to -9 ° C, 0 ° C to -10 ° C. In addition, the setting aspect of each temperature zone is not limited to this, What is necessary is just to set suitably according to the condition where the rapid cooling box 10 is used. For example, the temperature zone width is not limited to “10 ° C.”, and may be “5 ° C.” or “15 ° C.”. The temperature zone is provided every “2 ° C.” or “every 3 ° C.”. May be.

  And before the cooling start, when the detection chamber internal temperature Td1 is 55 ° C. as shown in FIG. 6, for example, 65 ° C. to 55 ° C., 64 ° C. to 54 ° C., 63 ° C. to 53 ° C., 62 ° C. to 52 ° C. Eleven temperature zones of 61 ° C, 61 ° C to 51 ° C, 60 ° C to 50 ° C, 59 ° C to 49 ° C, 58 ° C to 48 ° C, 57 ° C to 47 ° C, 56 ° C to 46 ° C, 55 ° C to 45 ° C The 11 30-minute timers corresponding to are reset and started.

  In step S103, the 30-minute timer in the reset / start state is set as a state A timer, and the 30-minute timer in the reset / start state is set as a state B timer. Note that the timer time of the state A timer and the state B timer is not limited to “30 minutes”, and may be a predetermined timer time depending on the situation in which the quick cooling box 10 is used.

  For example, when the detection chamber internal temperature Td1 is 55 ° C., for example, 65 ° C. to 55 ° C., 64 ° C. to 54 ° C.,... 11 ° 30-minute timers of 56 ° C. to 46 ° C. and 55 ° C. to 45 ° C. Becomes the state A timer. On the other hand, the 30-minute timer for each temperature zone corresponding to the detection chamber temperature Td1 of “65 ° C. <detection chamber temperature Td1 or detection chamber temperature Td1 <45 ° C.” becomes the state B timer. Specifically, 200 ° C to 190 ° C, 199 ° C to 189 ° C, ... 67 ° C to 57 ° C, 66 ° C to 56 ° C, 54 ° C to 44 ° C, 53 ° C to 43 ° C, ... 2 ° C to -8 A 30 minute timer corresponding to a temperature range of 1 ° C. to −9 ° C. and 0 ° C. to −10 ° C. becomes the state B timer.

  Next, in step S104, the refrigeration circuit 20 is turned on to start cooling (see time t0 in FIG. 6). Here, specifically, the operation of the compressor (not shown) of the refrigeration circuit 20 is started. Subsequently, in step S105, it is determined whether or not a recooling operation is performed. Here, “re-cooling operation” means that the cooling operation can be performed from the beginning when the user performs a predetermined operation. If it is determined that the recooling operation is performed, the process returns to step S102. On the other hand, if it is determined that the recooling operation is not being performed, it is determined in step S106 whether or not the timer in state A has timed out.

  If it is determined in step S106 that the state A timer (30 minute timer) has timed out, in step S107, the CPU 41 notifies the operator of a high temperature alarm using an alarm device such as the alarm buzzer 13, and step S108. Migrate to Here, the high temperature alarm is notified when the internal temperature is a predetermined amount (in this embodiment, “10 ° C.”) for 30 minutes (corresponding to “predetermined time” of the present invention) even during the cooling operation. This is because it is considered that some cooling abnormality has occurred because it does not decrease, that is, the internal temperature does not decrease with a predetermined temperature gradient. For example, a case where a large amount of high-temperature objects to be cooled is cooled or an abnormality occurs in the cooling system can be considered. Note that the “predetermined time” of “30 minutes” is set as a time when there is a margin in which a high temperature alarm is not issued when a normal refrigerator is used before the internal temperature decreases by a predetermined amount. Therefore, the “predetermined time” of the present invention is not limited to 30 minutes.

  On the other hand, if it is determined in step S106 that the state A timer has not timed out, in step S108, for example, the detected temperature (hereinafter referred to as “detected core temperature”) Td2 of the core temperature sensor 32 with a built-in heater is It is determined whether or not the temperature is lower than the set temperature Ts of the core temperature sensor, in other words, whether the cooling operation is continued or the operation is shifted to the cold insulation operation. Here, the “set temperature (Ts) of the core temperature sensor with built-in heater” is, for example, a temperature set in order to determine the timing for switching from the cooling operation to the cold insulation operation. Therefore, when the core temperature Td2 detected by the core temperature sensor 32 is lowered to the “set temperature (Ts) of the core temperature sensor with built-in heater”, the cooling operation is switched to the cold operation (see time t2 in FIG. 6). In addition, as described above, as the target maintenance temperature of the internal temperature during the cold storage operation, a “cold storage internal set temperature (Th; hereinafter simply referred to as“ set cold storage temperature ”)” is set separately. In the embodiment, the “set cool temperature (Th)” and the “set temperature (Ts) of the core temperature sensor with built-in heater” are set to the same temperature, for example, 3 ° C. as shown in FIG. .

  If it is determined in step S108 that the detected core temperature Td2 is equal to or lower than the set temperature Ts of the core temperature sensor, the process proceeds to step S129, and a process related to a high temperature alarm during a cold insulation operation, which will be described later, is performed.

  On the other hand, if it is determined in step S108 that the detected core temperature Td2 is higher than the set temperature Ts (set cool temperature Th) of the core temperature sensor, the process proceeds to step S109. In step S109, the internal temperature Td1 of the detection chamber is set to the set temperature during cooling (hereinafter simply referred to as “set cooling temperature”; here, for example, as shown in FIG. 6, −1 ° C.) “2 ° C.” is added to Tc. It is determined whether the temperature is equal to or lower than the temperature (Tc + 2 ° C.). That is, in step S109, it is determined whether or not the internal temperature (Td1) has decreased to the vicinity of the set cooling temperature Tc (1 ° C. in the present embodiment).

  The temperature corresponding to “near set cooling temperature Tc” is not limited to “set cooling temperature Tc + 2 ° C.”. That is, “the temperature to be added to the set cooling temperature Tc is not limited to“ 2 ° C. ”, and may be“ 1 ° C. ”or“ 3 ° C. ”, for example, and is appropriately determined according to the situation in which the rapid cooling chamber 10 is used. Just do it.

  In step S109, when it is determined that the detected internal temperature Td1 is not equal to or lower than the temperature obtained by adding 2 ° C. to the set cooling temperature (cooled internal set temperature) Tc, that is, the internal temperature (Td1) is equal to the set cooling temperature Tc. If it is determined that it has not decreased to the vicinity, the process proceeds to step S110. In step S110, it is determined whether or not the current temperature in the detection chamber Td1 is equal to the temperature stored in the predetermined area “Temp1”. If it is determined that the current detected internal temperature Td1 is equal to the temperature stored in the predetermined area “Temp1”, that is, if there is no change in the internal temperature, the process returns to step S104.

  On the other hand, if it is determined in step S110 that the current detected internal temperature Td1 is not equal to the temperature stored in the predetermined area “Temp1”, the current detected internal temperature Td1 is set in the predetermined area “Temp1” in step S111. ". Then, in step S112, as in step S102, the temperature zone to which the detection chamber internal temperature Td1 belongs is determined, and a 30 minute timer corresponding to all temperature zones to which the detection chamber internal temperature Td1 belongs, Reset and start a 30-minute timer.

  For example, each temperature zone has a temperature range of 10 ° C, and every 1 ° C, 200 ° C to 190 ° C, 199 ° C to 189 ° C, 198 ° C to 188 ° C, ... 70 ° C to 60 ° C 69 ° C to 59 ° C, 68 ° C to 58 ° C, ... 2 ° C to -8 ° C, 1 ° C to -9 ° C, 0 ° C to -10 ° C.

  When the internal temperature Td1 of the detection chamber is 54 ° C., for example, when the internal temperature decreases, only one state B timer (30 minute timer) corresponding to one temperature zone of 54 ° C. to 44 ° C. is used. Reset and start. In addition, 64 to 54 ° C, 63 to 53 ° C, 62 to 52 ° C, 61 to 51 ° C, 60 to 50 ° C, 59 to 49 ° C, 58 to 48 ° C, 57 to 47 ° C, The ten 30 minute timers corresponding to the ten temperature zones of 56 ° C. to 46 ° C. and 55 ° C. to 45 ° C. are currently state A timers, and therefore are not reset / started.

  Next, in step S113, the 30-minute timer newly reset and started in step S112 is changed from the state B timer to the state A timer. In step S112, the 30-minute timer corresponding to the deviated temperature zone is changed from the state A timer to the state B timer. Here, one 30 minute timer corresponding to the temperature range of 65 ° C. to 55 ° C. is changed from the state A timer to the state B timer. Moreover, when the detection chamber internal temperature Td1 is 54 ° C., for example, it corresponds to a temperature range of 64 ° C. to 54 ° C., 63 ° C. to 53 ° C., 55 ° C. to 45 ° C., 54 ° C. to 44 ° C. Eleven 30-minute timers become state A timers. On the other hand, the 30-minute timer for each temperature zone corresponding to the detection chamber temperature Td1 of “64 ° C. <detection chamber temperature Td1 or detection chamber temperature Td1 <44 ° C.” becomes the state B timer. Then, the process returns to step S104.

  Returning, in the process of step S109, when it is determined that the detected internal temperature Td1 is equal to or lower than the temperature obtained by adding 2 ° C. to the set cooling temperature Tc, that is, the internal temperature is near the set cooling temperature Tc, that is, 1 If it is determined that the temperature has decreased to ° C., the high temperature alarm 120 minute timer is reset and started in step S114 (see time t1 in FIG. 6). Here, the timer time is not limited to “120 minutes”, and may be appropriately selected according to the situation in which the rapid cooling box 10 is used.

  Next, in step S115, the temperature of “set cooling temperature Tc + 10 ° C. (9 ° C. in the present embodiment)” is stored in a predetermined region “Temp2” in the memory. Here, the temperature to be added to the set cooling temperature Tc is not limited to “10 ° C.”, and may be, for example, “9 ° C.” or “11 ° C.”, depending on the situation in which the rapid cooling chamber 10 is used. What is necessary is just to determine suitably.

  In step S116, as in step S105, it is determined whether or not a recooling operation is performed. If it is determined that the recooling operation is performed, the process returns to step S102. On the other hand, if it is determined that the recooling operation is not being performed, in step S117, whether the detected core temperature Td2 is equal to or lower than the set temperature Ts (set cool temperature Th) of the core temperature sensor, as in step S108. Determine if. In other words, it is determined whether to continue the cooling operation or to shift to the cold insulation operation. When it is determined that the detected core temperature Td2 is equal to or lower than the set temperature Ts (set cool temperature Th) of the core temperature sensor, the process proceeds to step S129, and a process related to a high temperature alarm during the cool temperature operation described later is performed.

  On the other hand, if it is determined in step S117 that the detected core temperature Td2 is higher than the set temperature Ts (set cool temperature Th) of the core temperature sensor, the process proceeds to step S118. In step S118, it is determined whether or not the high temperature alarm 120 minute timer has expired. If it is determined that the high temperature alarm 120 minute timer has timed out, in step S119, the high temperature alarm is notified to the worker by an alarm device such as the alarm buzzer 13, and the process proceeds to step S120. Here, the high temperature alarm is notified for 120 minutes at the temperature of the “set cooling temperature Tc + 10 ° C.” even though the inside temperature has dropped to the vicinity of the set cooling temperature Tc during the cooling operation. This is because it is considered that some kind of cooling abnormality has occurred.

  On the other hand, if it is determined in step S118 that the high-temperature alarm 120-minute timer has not timed out, in step S120, the detection chamber temperature Td1 is “set cooling temperature Tc−2 ° C. (in this embodiment, −3 ° C.). ) ”Or not. Here, the temperature to be subtracted from the set cooling temperature Tc is not limited to “2 ° C.”, and may be “1 ° C.” or “3 ° C.”, for example, depending on the situation in which the rapid cooling box 10 is used. What is necessary is just to determine suitably.

  When it is determined that the detection internal temperature Td1 is equal to or lower than the “set cooling temperature Tc−2 ° C.”, it is determined in step S121 whether the refrigeration circuit 20 is ON. If the refrigeration circuit 20 is not ON, the process returns to step S114. On the other hand, if the refrigeration circuit 20 is ON, the refrigeration circuit 20 is turned OFF in step S122. In step S123, the refrigeration circuit protection 2-minute timer for preventing the refrigeration circuit 20 from being immediately turned ON again is reset and started, and the process returns to step S114.

  On the other hand, if it is determined in step S120 that the detected internal temperature Td1 is not equal to or lower than the “set cooling temperature Tc−2 ° C.”, the detected internal temperature Td1 is set to “set cooling temperature Tc + 2 ° C. (in the present embodiment). 1 ° C.) ”or less. Here, the temperature to be added to the set cooling temperature Tc is not limited to “2 ° C.”, and may be “1 ° C.” or “3 ° C.”, for example, depending on the situation in which the rapid cooling box 10 is used. What is necessary is just to determine suitably.

  When it is determined that the detection internal temperature Td1 is equal to or lower than the “set cooling temperature Tc + 2 ° C.”, the process returns to step S114. On the other hand, if it is determined that the detected internal temperature Td1 is not equal to or lower than the “set cooling temperature Tc + 2 ° C.”, it is determined in step S125 whether the refrigeration circuit 20 is ON. When it determines with the refrigerating circuit 20 being ON, it transfers to step S128.

  On the other hand, if it is determined that the refrigeration circuit 20 is not ON, it is determined in step S126 whether or not the refrigeration circuit protection 2-minute timer has expired. If it is determined that the refrigeration circuit protection 2-minute timer has not expired, the process proceeds to step S128. On the other hand, if it is determined that the refrigeration circuit protection 2-minute timer has timed up, in step S127, the refrigeration circuit 20 is turned on in order to lower the internal temperature.

  Next, in step S128, it is determined whether or not the detected internal temperature Td1 is equal to or higher than “Temp2”, that is, whether or not the detected internal temperature Td1 is equal to or higher than “set cooling temperature Tc + 10 ° C.”. If it is determined that the detection chamber temperature Td1 is equal to or higher than “Temp2”, the process returns to step S115. If it is determined that the detection temperature Td1 is not equal to or higher than “Temp2”, the process returns to step S114 to reset the high temperature alarm 120 minute timer. Start.

2.2 High temperature alarm during cold insulation operation Next, in step S108 and step S117, when the detected core temperature Td2 is equal to or lower than the set temperature Ts (set cold insulation temperature Th) of the core temperature sensor, it is determined that the cold insulation operation is being performed. Processing related to the high temperature alarm will be described.

  First, in step S129, the CPU 41 determines whether or not a recooling operation is performed. If it is determined that the recooling operation is performed, the process returns to step S102. On the other hand, if it is determined that the re-cooling operation is not being performed, the temperature of “set cooling temperature Th + 10 ° C. (13 ° C. in the present embodiment)” is stored in the predetermined area “Temp3” in the memory in step S130. . Here, the temperature to be added to the set cool temperature Th is not limited to “10 ° C.”, and may be, for example, “9 ° C.” or “11 ° C.”, depending on the situation in which the rapid refrigerator 10 is used. What is necessary is just to determine suitably.

  Next, in step S131, it is determined whether or not the temperature in the detection compartment Td1 is equal to or lower than the “set cold insulation temperature Th-2 ° C. (1 ° C. in the present embodiment)”. When it is determined that the detection internal temperature Td1 is equal to or lower than the “set cold insulation temperature Th-2 ° C.”, it is determined in step S132 whether the refrigeration circuit 20 is ON. Here, the temperature to be subtracted from the set cold insulation temperature Th is not limited to “2 ° C.”, and may be “1 ° C.” or “3 ° C.”, for example, depending on the situation in which the rapid refrigerator 10 is used. What is necessary is just to determine suitably.

  If the refrigeration circuit 20 is not ON in step S132, the high temperature alarm 120 minute timer is reset and started in step S135, and the process returns to step S130. On the other hand, if the refrigeration circuit 20 is ON, the refrigeration circuit 20 is turned off in step S133, the refrigeration circuit protection 2-minute timer is reset and started in step S134, and the high-temperature alarm 120-minute timer is similarly set in step S135. Reset and return to step S130.

  If it is determined in step S131 that the detected internal temperature Td1 is not equal to or lower than the “set cool temperature Th-2 ° C.”, the detected internal temperature Td1 is set to “set cool temperature Th + 2 ° C. (in this embodiment, in this embodiment). 5 ° C.) ”or less. Here, the temperature to be added to the set cool temperature Th is not limited to “2 ° C.”, and may be, for example, “1 ° C.” or “3 ° C.”, depending on the situation in which the quick refrigerator 10 is used. What is necessary is just to determine suitably.

  If it is determined that the temperature in the detection chamber Td1 is equal to or lower than the “set cool temperature Th + 2 ° C.”, the high temperature alarm 120 minute timer is reset and started in step S135, and the process returns to step S130. On the other hand, if it is determined that the detected internal temperature Td1 is not equal to or lower than the “set cold insulation temperature Th + 2 ° C.”, it is determined in step S137 whether the refrigeration circuit 20 is ON. When it determines with the refrigerating circuit 20 being ON, it progresses to step S140.

  On the other hand, if it is determined in step S137 that the refrigeration circuit 20 is not ON, it is determined in step S138 whether or not the refrigeration circuit protection 2-minute timer has expired. If it is determined that the refrigeration circuit protection 2-minute timer has not expired, the process proceeds to step S140. On the other hand, if it is determined that the refrigeration circuit protection 2-minute timer has timed up, the refrigeration circuit 20 is turned on in step S139, and in step S140, the detected internal temperature Td1 is equal to or higher than “Temp3”, that is, the detected temperature Td1. Is determined to be equal to or higher than “set cool temperature Th + 10 ° C.”.

  If it is determined that the detection chamber internal temperature Td1 is not equal to or higher than “Temp3”, the high temperature alarm 120 minute timer is reset and started in step S135, and the process returns to step S130. On the other hand, if it is determined that the detection chamber temperature Td1 is equal to or higher than “Temp3”, it is determined in step S141 whether or not the high temperature alarm 120 minute timer has expired.

  If it is determined in step S141 that the high temperature alarm 120 minute timer has not expired, the process returns to step S130. On the other hand, if it is determined that the high-temperature alarm 120-minute timer has timed out, in step S142, the operator is notified of the high-temperature alarm by, for example, the alarm buzzer 13 or the like. Here, it is considered that a high temperature alarm is notified because, during the cold insulation operation, since the internal temperature is 120 minutes at the temperature of the “set cold insulation temperature Th + 10 ° C.”, some kind of cold abnormality such as an abnormality in the refrigeration circuit 20 has occurred. Because.

  As described above, in the present embodiment, during the cooling operation, the CPU (control device 40) 41 waits until the temperature Td1 of the storage chamber reaches the vicinity of the set cooling temperature Tc (Tc + 2 ° C.) from the cooling start temperature. When the storage room temperature Td1 does not decrease by 10 ° C. (predetermined amount) within 30 minutes (predetermined time), a high temperature alarm is issued. In the cooling operation, after the storage room temperature Td1 reaches around the set cooling temperature (Tc + 2 ° C.), it continues for 120 minutes (predetermined time) at a temperature 10 ° C. (predetermined temperature) higher than the set cooling temperature Tc. In addition, a high temperature alarm is given. Further, during the cold insulation operation, the CPU 41 issues a high temperature alarm when the temperature Td1 of the storage room continues for 120 minutes (predetermined time) at a temperature 10 ° C. (predetermined temperature) higher than the set cold insulation temperature Th.

  That is, the CPU 41 responds to the temperature transition of the storage room until the temperature Td1 of the storage room reaches the set cooling temperature vicinity (1 ° C.) from the cooling start temperature (55 ° C.) during the cooling operation (FIG. 6). Time t0 to time t1) and after the temperature Td1 of the storage chamber reaches around the set cooling temperature (time t1 to time t2 in FIG. 6), a high temperature alarm is given, and during the cold insulation operation (in FIG. 6) After time t2), a high temperature alarm is given in a manner different from that during cooling operation. Therefore, according to the configuration of the present embodiment, it is possible to accurately detect and alarm a high temperature abnormality (temperature abnormality) in the storage corresponding to the temperature transition of the storage chamber from the cooling operation to the cold insulation operation.

3. Low Temperature Alarm Processing Next, the low temperature alarm processing according to the present embodiment will be described with reference to FIGS. FIGS. 7 to 9 are flowcharts related to the low temperature alarm process. The control device 40, specifically, the CPU 41, performs this low temperature alarm process in the same manner as the high temperature alarm process, for example, a program stored in the ROM of the memory 42. Follow the instructions.

3.1 Low-temperature alarm during refrigeration operation First, in step S201, the CPU 41 resets the refrigeration circuit protection 2-minute timer, turns on the refrigeration circuit 20, and starts cooling (corresponding to time t0 in FIG. 6). In step S202, the low temperature alarm 60 minute timer is reset and started. Subsequently, in step S203, the temperature “set cooling temperature Tc−5 ° C. (−6 ° C. in the present embodiment)” is stored in a predetermined area “Temp4” in the memory. Here, the timer time of the low temperature alarm timer is not limited to “60 minutes”, and the temperature to be subtracted from the set cooling temperature Tc is not limited to “5 ° C.”. What is necessary is just to determine suitably according to the condition used.

  Next, in step S204, it is determined whether or not a recooling operation is performed. If it is determined that the recooling operation is performed, the process returns to step S203. On the other hand, if it is determined that the recooling operation is not being performed, it is determined in step S205 whether or not the detected core temperature Td2 is equal to or lower than the set temperature Ts (set cool temperature Th) of the core temperature sensor. In other words, it is determined whether to continue the cooling operation or to shift to the cold insulation operation. When it is determined that the detected core temperature Td2 is equal to or lower than the set cool temperature Th (after time t2 in FIG. 6), the process proceeds to step S217, and a process related to a low temperature alarm at the cool operation described later is performed.

  On the other hand, if it is determined in step S205 that the detected core temperature Td2 is higher than the set temperature Ts (set cool temperature Th) of the core temperature sensor, the process proceeds to step S206. In step S206, it is determined whether or not the low temperature alarm 60 minute timer has expired. If it is determined that the low temperature alarm 60-minute timer has timed out, in step S207, a low temperature alarm is notified to the operator by, for example, an alarm buzzer, and the process proceeds to step S208. Here, it is considered that the low temperature alarm is informed that some cooling abnormality (overcooling) has occurred during the cooling operation because the internal temperature has passed for 60 minutes at a temperature equal to or lower than the “set cooling temperature Tc−5 ° C.”. Because.

  On the other hand, if it is determined in step S206 that the low temperature alarm 60 minute timer has not timed out, in step S208, the detection internal temperature Td1 is “set cooling temperature Tc−2 ° C. (in this embodiment, −3 ° C) ”or less. Here, the temperature to be subtracted from the set cooling temperature Tc is not limited to “2 ° C.”, and may be appropriately determined according to the situation in which the rapid cooling box 10 is used.

  When it is determined that the detection internal temperature Td1 is equal to or lower than the “set cooling temperature Tc−2 ° C.”, it is determined in step S209 whether the refrigeration circuit 20 is ON. If the refrigeration circuit 20 is not ON, the process proceeds to step S212. On the other hand, if the refrigeration circuit 20 is ON, the refrigeration circuit 20 is turned off in step S210, the refrigeration circuit protection 2-minute timer is reset and started in step S211, and the process proceeds to step S212.

  In step S212, it is determined whether or not the detection chamber temperature Td1 is equal to or lower than “Temp4”, that is, whether or not the detection chamber temperature Td1 is equal to or lower than “set cooling temperature Tc−5 ° C.”. When it is determined that the detection chamber temperature Td1 is equal to or lower than the “set cooling temperature Tc−5 ° C.”, the process returns to step S203 and it is determined that the detection chamber temperature Td1 is not equal to or lower than the “set cooling temperature Tc-5 ° C.”. In the case, the process returns to step S202.

  If it is determined in step S208 that the detected internal temperature Td1 is not equal to or lower than the “set cooling temperature Tc−2 ° C.”, the detected internal temperature Td1 is set to “set cooling temperature Tc + 2 ° C. (in the present embodiment). 1 ° C.) ”or less. When it is determined that the detection internal temperature Td1 is equal to or lower than the “set cooling temperature Tc + 2 ° C.”, the process returns to step S202. On the other hand, if it is determined that the detected internal temperature Td1 is not equal to or lower than the “set cooling temperature Tc + 2 ° C.”, it is determined in step S214 whether the refrigeration circuit 20 is ON. Here, the temperature to be added to the set cooling temperature Tc is not limited to “2 ° C.”, and may be appropriately determined according to the situation in which the rapid cooling box 10 is used.

  If it is determined in step S214 that the refrigeration circuit 20 is ON, the process returns to step S202. On the other hand, if it is determined that the refrigeration circuit 20 is not ON, it is determined in step S215 whether or not the refrigeration circuit protection 2-minute timer has expired. If it is determined that the refrigeration circuit protection 2-minute timer has not expired, the process returns to step S202. On the other hand, if it is determined that the refrigeration circuit protection 2-minute timer has expired, the refrigeration circuit 20 is turned on in step S216, and the process returns to step S202.

3.2 Low temperature alarm during cold insulation operation Next, the process related to the low temperature alarm when it is determined in step S205 that the detected core temperature Td2 is equal to or lower than the set temperature Ts (set cool temperature Th) of the core temperature sensor will be described. .

  First, in step S217, the CPU 41 determines whether or not a recooling operation is performed. If it is determined that the recooling operation is performed, the process returns to step S203. On the other hand, if it is determined that the re-cooling operation is not being performed, “set cooling temperature Tc−5 ° C. (−6 ° C. in the present embodiment)” is stored in the predetermined area “Temp5” in the memory in step S218. Stores temperature. Here, the temperature to be subtracted from the set cooling temperature Tc is not limited to “5 ° C.”, and may be appropriately determined according to the situation in which the rapid cooling box 10 is used.

  Next, in step S219, it is determined whether or not the low temperature alarm 60 minute timer has expired. If it is determined that the low temperature alarm 60 minute timer has expired, in step S220, a low temperature alarm is notified to the worker by, for example, the alarm buzzer 13, and the process proceeds to step S221. Here, the low temperature alarm is usually notified in order to increase the internal temperature from the set cooling temperature Tc to the set cool temperature Th during the initial period of the cool keeping operation (corresponding to the time t2 to the time t4 in FIG. 6). Is controlled. For example, the refrigeration circuit 20 is stopped and allowed to stand naturally until the internal temperature rises to the set cool temperature Th. However, in this initial period of the cold insulation operation, it is considered that some cooling abnormality (supercooling) occurred because the internal temperature was 60 minutes at the temperature of “set cooling temperature Tc−5 ° C.”.

  On the other hand, if it is determined in step S219 that the low temperature alarm 60-minute timer has not timed out, in step S221, the detection chamber temperature Td1 is in the vicinity of the set cool temperature Th "set cool temperature Th-2 ° C. (1 ° C. in this embodiment) ”or not is determined. Here, the temperature to be subtracted from the cold insulation temperature Th is not limited to “2 ° C.”, and may be appropriately determined according to the situation in which the rapid cooling box 10 is used.

  If it is determined that the detection chamber internal temperature Td1 is not equal to or higher than the “set cool temperature Th-2 ° C.”, it is determined in step S222 whether the refrigeration circuit 20 is ON. If the refrigeration circuit 20 is not ON, the process proceeds to step S225. On the other hand, if the refrigeration circuit 20 is ON, the refrigeration circuit 20 is turned off in step S223, and the refrigeration circuit protection 2-minute timer is reset and started in step S224.

  Next, in step S225, it is determined whether the detection chamber temperature Td1 is equal to or lower than “Temp5”, that is, whether the detection chamber temperature Td1 is equal to or lower than “set cooling temperature Tc−5 ° C.”. When it is determined that the detection internal temperature Td1 is equal to or lower than the “set cooling temperature Tc−5 ° C.”, the process returns to step S218. On the other hand, when it is determined that the detection chamber temperature Td1 is not equal to or lower than the “set cooling temperature Tc−5 ° C.”, the low temperature alarm 60 minute timer is reset / started in step S226, and the process returns to step S218.

  Further, if it is determined in step S221 that the detected internal temperature Td1 is equal to or higher than the “set cold insulation temperature Th−2 ° C.” (see time 3 in FIG. 6), has the recooling operation been performed in step S227? Determine if. If it is determined that the recooling operation is performed, the process returns to step S203. On the other hand, if it is determined that the re-cooling operation is not performed, in step S228, the predetermined area “Temp6” in the memory is set to “set cool temperature Th-5 ° C. (in this embodiment, −2 ° C.)”. Stores temperature. Here, the temperature to be subtracted from the cold insulation temperature Th is not limited to “5 ° C.”, and may be appropriately determined according to the situation in which the quick cooler 10 is used.

  Next, in step S229, it is determined whether or not the low temperature alarm 60 minute timer has expired. If it is determined that the low-temperature alarm 60 minute timer has expired, in step S230, the operator is notified of the low-temperature alarm by, for example, the alarm buzzer 13 and the process proceeds to step S231. Here, it is considered that the low temperature alarm is informed that some sort of cooling abnormality (supercooling) has occurred because the internal temperature has passed the “set cold storage temperature Th-5 ° C.” or less for 60 minutes during the cold storage operation. Because.

  On the other hand, if it is determined in step S229 that the low temperature alarm 60-minute timer has not timed out, in step S231, the temperature in the detection compartment Td1 is “set cool temperature Th-2 ° C. (in this embodiment, 1 ° C. ) ”Or not. Here, the temperature to be subtracted from the cold insulation temperature Th is not limited to “2 ° C.”, and may be appropriately determined according to the situation in which the rapid cooling box 10 is used.

  When it is determined that the detection internal temperature Td1 is equal to or lower than the “set cold storage temperature Th-2 ° C.”, it is determined in step S232 whether the refrigeration circuit 20 is ON. If the refrigeration circuit 20 is not ON, the process proceeds to step S235. On the other hand, if the refrigeration circuit 20 is ON, the refrigeration circuit 20 is turned OFF in step S233, and the refrigeration circuit protection 2-minute timer is reset and started in step S234.

  Next, in step S235, it is determined whether or not the detected internal temperature Td1 is equal to or lower than “Temp6”, that is, whether the detected internal temperature Td1 is equal to or lower than the “set cool temperature Th−5 ° C.”. When it is determined that the detection chamber internal temperature Td1 is equal to or lower than the “set cool temperature Th-5 ° C.”, the process returns to step S228. On the other hand, if it is determined that the detection chamber temperature Td1 is not equal to or lower than the “set cool temperature Th-5 ° C.”, the low temperature alarm 60 minute timer is reset / started in step S236, and the process returns to step S228.

  If it is determined in step S231 that the detected internal temperature Td1 is not equal to or lower than the “set cool temperature Th-2 ° C.”, the detected internal temperature Td1 is set to “set cool temperature Th + 2 ° C. (in the present embodiment) in step S237. 5 ° C.) ”or less. Here, the temperature to be added to the cold insulation temperature Th is not limited to “2 ° C.”, and may be determined as appropriate according to the situation in which the quick cooler 10 is used.

  If it is determined that the temperature in the detection compartment Td1 is equal to or lower than the “set cool temperature Th + 2 ° C.”, the low temperature alarm 60 minute timer is reset / started in step S236, and the process returns to step S228. On the other hand, if it is determined that the detected internal temperature Td1 is not equal to or lower than the “set cold storage temperature Th + 2 ° C.”, it is determined in step S238 whether the refrigeration circuit 20 is ON. If it is determined that the refrigeration circuit 20 is ON, the low temperature alarm 60 minute timer is reset and started in step S236, and the process returns to step S228.

  On the other hand, if it is determined in step S238 that the refrigeration circuit 20 is not ON, it is determined in step S239 whether or not the refrigeration circuit protection 2-minute timer has expired. If it is determined that the refrigeration circuit protection 2-minute timer has not expired, the low-temperature alarm 60-minute timer is reset and started in step S236, and the process returns to step S228. On the other hand, if it is determined that the refrigeration circuit protection 2-minute timer has expired, the refrigeration circuit 20 is turned on in step S240, the low-temperature alarm 60-minute timer is reset / started in step S236, and the process returns to step S228.

  As described above, in this embodiment, during the cooling operation, the CPU (control device 40) 41 has a temperature Td1 of the storage chamber 11 that is 5 ° C. (predetermined temperature) lower than the set cooling temperature Tc for 60 minutes ( A low temperature alarm is issued when the operation is continued. Further, during the cold insulation operation, until the temperature of the storage chamber 11 reaches the set cold storage temperature Th (Th-2 ° C.) from the set cooling temperature Tc (corresponding to time t2 to time t3 in FIG. 6), the storage chamber Is continued for 60 minutes (predetermined time) at a temperature 5 ° C. (predetermined temperature) lower than the set cooling temperature Tc. In addition, after the temperature Td1 of the storage room reaches around the set cool temperature (Th-2 ° C.) during the cool operation, the temperature Td1 of the storage room is 60 ° C. at a temperature 5 ° C. (predetermined temperature) lower than the set cool temperature Th. If the minute (predetermined time) continues, a low temperature alarm is given.

  Therefore, even when the difference between the set temperature Tc during cooling and the set temperature Th during cold storage is large and it takes time to increase the temperature during the cold storage, a low temperature alarm is unnecessarily generated. It is prevented from being issued. In addition, even when the temperature in the refrigerator drops more than necessary during the cold storage operation, the low temperature abnormality in the refrigerator is accurately detected based on the difference between the set temperature Th during the cold storage and the detected temperature Td1 of the internal temperature sensor. Can detect and alarm. That is, according to the configuration of the present embodiment, it is possible to accurately detect and alarm a low-temperature abnormality (temperature abnormality) in the storage corresponding to the temperature transition of the storage chamber from the cooling operation to the cold insulation operation.

<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 above embodiment, “setting cold temperature Th” which is the set temperature in the cold storage chamber, and “setting of the core temperature sensor with built-in heater” as the setting temperature for determining the timing for switching from the cooling operation to the cold operation. Although an example in which the “temperature Ts” is set to the same temperature is shown, the present invention is not limited to this. For example, the “set cool temperature Th” may be set to a temperature lower than the “set temperature Ts of the core temperature sensor with built-in heater”.

  (2) In the above embodiment, an example is shown in which the switching timing (see time t2 in FIG. 6) for switching from the cooling operation to the cold insulation operation is determined based on the detected core temperature Td2 that is the detected temperature of the core temperature sensor 32. However, it is not limited to this. For example, the timing at which a predetermined time has elapsed from the time when the cooling is started may be determined as the switching timing, or the timing at which the predetermined time has elapsed after the detection chamber temperature Td1 reaches the set cooling temperature Tc. The switching timing may be determined.

(3) In the above embodiment, from time t0 to time t1 in FIG. 6 in the high temperature alarm process, the temperature gradient for issuing the high temperature alarm (10 ° C. for 30 minutes) regardless of the detection chamber temperature Td1. However, the present invention is not limited to this. For example, depending on a predetermined temperature segment of the detection chamber temperature Td1, the temperature gradient may be “5 ° C. decrease in 30 minutes”, “10 ° C. decrease in 30 minutes”, and “30 minutes”. Or “decrease of 10 ° C. in 40 minutes”, “decrease of 10 ° C. in 30 minutes”, and “in 20 minutes” You may make it change like "the fall of 10 degreeC."
(4) In the above embodiment, an example in which both the “high temperature alarm process” and the “low temperature alarm process” are performed has been described, but the present invention is not limited to this. For example, in the configuration of the refrigerator, only “high temperature alarm processing” may be performed, or only “low temperature alarm processing” may be performed.

It is a schematic front view of the refrigerator which concerns on one Embodiment of this invention. It is a glock figure of the composition concerning alarm processing of this embodiment. It is a flowchart which concerns on the high temperature warning process of this embodiment. It is a flowchart which similarly concerns on a high temperature warning process. It is a flowchart which similarly concerns on a high temperature warning process. It is a time chart which shows transition of the temperature in a warehouse concerning this embodiment. It is a flowchart which concerns on the low temperature warning process of this embodiment. It is a flowchart which similarly concerns on a low temperature warning process. It is a flowchart which similarly concerns on a low temperature warning process.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Rapid cooler (cooler) 13 ... Alarm buzzer 20 ... Refrigeration circuit (cooler) 20 ... Cooling fan (cooler) 31 ... Inside temperature sensor 32 ... Core temperature sensor 40 ... Control device 41 ... CPU F ... Food (Object to be cooled)

Claims (4)

A storage chamber for storing an object to be cooled, a cooling device for cooling the storage chamber, an internal temperature sensor for detecting the temperature of the storage chamber, and a detection temperature of the internal temperature sensor, A control device for detecting a temperature abnormality and alarming the temperature abnormality, and using the cooling device, the cooling operation for cooling the temperature of the storage chamber to a set cooling temperature, and continuing the cooling operation, In a refrigerator that performs a cold insulation operation to maintain the temperature of the storage room at a set cold insulation temperature,
The said control apparatus performs the detection and alarm of the temperature abnormality of the said storage chamber separately at the time of cooling operation and at the time of a cold storage operation, respectively, The refrigerator characterized by the above-mentioned. The control device includes:
During the cooling operation, when the temperature of the storage chamber does not decrease by a predetermined amount within a predetermined time until the temperature of the storage chamber reaches from the cooling start temperature to the vicinity of the set cooling temperature, and the storage chamber After reaching the set cooling temperature, the high temperature alarm is performed when the temperature continues for a predetermined time at a temperature higher than the set cooling temperature,
2. The refrigerator according to claim 1, wherein, during the cold insulation operation, a high temperature alarm is issued when the temperature of the storage chamber continues for a predetermined time at a temperature higher than the set cold insulation temperature by a predetermined temperature. The control device includes:
During the cooling operation, when the temperature of the storage chamber continues for a predetermined time at a temperature lower than the set cooling temperature by a predetermined temperature, a low temperature alarm is performed,
During the cold insulation operation, when the temperature of the storage chamber continues for a predetermined time at a temperature lower than the set cooling temperature until the temperature of the storage chamber reaches the set cold storage temperature from the set cooling temperature. And, after the temperature of the storage room reaches around the set cold insulation temperature, a low temperature alarm is given when the temperature of the storage room continues for a predetermined time at a temperature lower than the set cold storage temperature. The refrigerator according to claim 1. The control device includes:
During the cooling operation,
The temperature of the storage chamber does not decrease by a predetermined amount within a predetermined time until the temperature of the storage chamber reaches the vicinity of the set cooling temperature from the cooling start temperature, and the temperature of the storage chamber is the set cooling temperature. After reaching the vicinity, when continuing for a predetermined time at a temperature higher than the set cooling temperature, a high temperature alarm is performed,
When the temperature of the storage room continues for a predetermined time at a temperature lower than the set cooling temperature by a predetermined temperature, a low temperature alarm is performed,
During the cold insulation operation,
When the temperature of the storage room continues for a predetermined time at a temperature higher than the set cold temperature, and a high temperature alarm,
When the temperature of the storage chamber continues for a predetermined time at a temperature lower than the set cooling temperature until the temperature of the storage chamber reaches from the set cooling temperature to the vicinity of the set cool temperature, and in the storage chamber The low temperature alarm is performed when the temperature of the storage chamber continues for a predetermined time at a temperature lower than the set cool temperature after the temperature reaches the set cool temperature. Refrigerator.

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