JP2002054872A - Abnormal temperature alarm device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an abnormal temperature alarm device which prevents false detection as far as possible and also can prevent the damage or the like of food and others as far as possible by changing an abnormal alarm temperature on the basis of a gradient of a temperature rise in a refrigerator and by conducting an alarm operation at a high abnormal alarm temperature or a low abnormal alarm temperature. SOLUTION: A computer 12 can change the abnormal alarm temperature to be set between the high abnormal alarm temperature and the low abnormal alarm temperature on the basis of the result of detection of the temperature gradient of an intra-refrigerator temperature (S3) and, in addition, it can change a delay time till the alarm is operated after the abnormal alarm temperature is detected (S5, S6). When the computer 12 detects the temperature gradient of a gentle rise of the intra-refrigerator temperature and when the low abnormal alarm temperature is reached, the alarm device 14 is driven (S7) with the delay time set to be long. When the computer 12 detects the temperature gradient of a sharp rise of the intra-refrigerator temperature and when the high abnormal alarm temperature is reached, the alarm device 14 is driven (S10) with the delay time set to be short.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a refrigerator,
The temperature inside the storage, such as a freezer, showcase, and heat storage,
Or, it relates to an abnormal temperature alarm device at room temperature of a normal room or the like, and in particular, changes an abnormal alarm temperature based on a gradient of a temperature rise or a temperature decrease in a refrigerator or a room, and outputs a high temperature abnormal alarm temperature or a low temperature abnormality. The present invention relates to an abnormal temperature alarm device that performs an alarm operation at an alarm temperature.

[0002]

2. Description of the Related Art Conventionally, in this type of storage, an alarm temperature is set in advance in order to eliminate the inconvenience of food spoilage due to a failure of a cooling device or the like. When a predetermined time elapses, an alarm buzzer, an alarm lamp, and the like are configured to generate an alarm. However, if a large amount of high-temperature food is put into the refrigerator, or if the door is left open for a long time due to forgetting to close the door, the temperature of the refrigerator rises abnormally in a short time. (Graph (a) in FIG. 5)
reference). Further, when a small amount of high-pitched food or the like is put into the refrigerator, the temperature in the refrigerator may gradually rise (see FIG. 5).
Graph (b).

[0003]

However, when any of the above temperature graphs (see the graph (a) of FIG. 5 and the graph (b) of FIG. 5) is abnormal, conventionally, the abnormal alarm temperature (see FIG. After reaching a dashed line, a warning is issued after a predetermined time has elapsed in order to prevent malfunction. Therefore, especially in the case of a gradual temperature rise (see the graph (b) in FIG. 5), an alarm is generated at the point when the food has been spoiled because the food has not been in a low temperature state for a long time, and the food has been spoiled. There was something. In addition, when the temperature inside the refrigerator rises abnormally in a short time, the temperature detecting element may be broken. Therefore, from the viewpoint of preventing malfunction, it is desirable to set the abnormal alarm temperature higher, but on the other hand, to set the abnormal alarm temperature higher. If the water content is high, damage to foods and the like may increase. The present invention has been made to solve the above-described problem, and changes an abnormal alarm temperature based on a gradient of a temperature increase or a temperature decrease in a refrigerator or a room, thereby changing a high abnormal alarm temperature or a low abnormal temperature. It is an object of the present invention to provide an abnormal temperature alarm device capable of preventing erroneous detection as much as possible by performing an alarm operation at an alarm temperature and preventing damage to foods and the like as much as possible.

[0004]

According to a first aspect of the present invention, there is provided an abnormal temperature alarm apparatus for detecting and alarming an abnormal temperature in a refrigerator or a room. A slope detecting means for detecting a descending slope, and an abnormal alarm temperature setting means for setting an abnormal alarm temperature are provided, and further, based on a detection result of the gradient detecting means,
Control to change the set abnormal alarm temperature to lower the abnormal alarm temperature that is set when the temperature rise is gentle, or to increase the abnormal alarm temperature that is set when the temperature rise is steep Means are provided. According to the first aspect of the invention, the set abnormal alarm temperature can be changed, for example, between a high abnormal alarm temperature and a low abnormal alarm temperature based on the detection result of the temperature gradient. When the gradient detecting means detects a temperature gradient in which the temperature in the refrigerator or the room gradually rises, when the temperature reaches the low-temperature abnormality alarm temperature set to be lower than the high-temperature abnormality alarm temperature, the control device (for example, a computer) ) Activates an alarm device (eg, an alarm buzzer or an alarm lamp). As a result, the user rarely leaves food or the like in a high temperature state, for example, and can minimize damage such as decay of the food or the like as much as possible. On the other hand, when the gradient detecting means detects a temperature gradient in which the temperature inside the compartment or the room rises sharply, the alarm device is activated when the temperature exceeds the low temperature abnormal alarm temperature and reaches the high temperature abnormal alarm temperature. Therefore, when the temperature in the refrigerator or the room rises to an abnormally high temperature in a short time, the temperature of the abnormal alarm is set to a high value from the viewpoint of preventing malfunction, so that the possibility of erroneous detection is reduced. It is possible to prevent unnecessary warnings to the user as much as possible. In this case, the control means may adopt only a mode in which the set abnormal alarm temperature is decreased based on the detection result of the gradient detection means when the temperature rise gradient is gentle, or the temperature rise gradient may be steep. In such a case, only the mode of raising the abnormal alarm temperature may be adopted, or both modes may be adopted. Further, the gradient detecting means may detect either a gradient of a temperature rise or a gradient of a temperature drop.

According to the second aspect of the present invention, there is provided an abnormal temperature alarm device for detecting and alarming an abnormal temperature in a refrigerator or a room, a gradient detecting means for detecting a gradient of a temperature rise or a temperature fall, An abnormal alarm temperature setting means for setting an abnormal alarm temperature, and a delay time setting means for setting a delay time until an alarm is activated after detection of the abnormal alarm temperature are provided, and further based on a detection result of the gradient detecting means. In order to increase the delay time by lowering the abnormal alarm temperature that is set when the temperature rise is gentle, or to increase the abnormal alarm temperature that is set when the temperature rise is steep, to shorten the delay time Control means for changing the abnormal alarm temperature set by the abnormal alarm temperature setting means and the delay time by the delay time setting means. According to the invention described in claim 2,
Based on the detection result of the temperature gradient, the set abnormal alarm temperature can be changed, for example, between a high abnormal alarm temperature and a low abnormal alarm temperature, and until the alarm is activated after the abnormal alarm temperature is detected. The delay time can be changed between a long delay time and a short delay time. In this case, the length of the delay time relatively indicates the delay time set based on the detection result of the temperature gradient, and naturally, even if the delay time is long, the food or the like is not left in a high temperature state. Need to be considered.

[0006] When the gradient detecting means detects a temperature gradient in which the temperature inside the refrigerator or the room rises gradually, when the temperature reaches a low-temperature abnormality alarm temperature which is set lower than the high-temperature abnormality alarm temperature, control is performed. The device (eg, computer)
Since the alarm device (for example, an alarm buzzer or an alarm lamp) is driven after setting a long delay time and elapse of a predetermined time, the user rarely leaves the food or the like in a high temperature state, and the food or the like becomes rotten. And the like can be prevented as much as possible, and as a result of setting a long delay time, unnecessary warnings to the user can be prevented as much as possible. On the other hand, when the gradient detecting means detects a temperature gradient in which the temperature in the refrigerator or the room rises sharply, the temperature exceeds the low temperature abnormal alarm temperature, and when the high temperature abnormal alarm temperature is reached, a short delay time (if necessary) Delay time to zero)
And the alarm device is driven without waiting for a predetermined time to elapse. Therefore, when the temperature in the refrigerator or the room rises to an abnormally high temperature in a short time, the temperature of the abnormal alarm is set to a high value from the viewpoint of preventing malfunction, so that the possibility of erroneous detection is reduced. It is possible to prevent unnecessary warnings to the user as much as possible. Furthermore, as a result of setting a short delay time, an alarm is issued as soon as possible, so that damage such as spoilage of food or the like can be minimized. In this case, the control unit may adopt only a mode in which the set abnormal alarm temperature is reduced based on the detection result of the gradient detection unit and the delay time is lengthened by lowering when the gradient of the temperature rise is gentle, When the gradient of the temperature rise is steep, only the mode in which the abnormal alarm temperature is raised to shorten the delay time may be adopted, or both modes may be adopted. Further, the gradient detecting means may detect either a gradient of a temperature rise or a gradient of a temperature drop.

[0007]

Embodiments of the present invention will be described below in detail. FIG. 1 is a front view of a cooling storage 1 according to this embodiment. FIG. 2 is an electric block diagram of the cooling storage 1 of this embodiment. FIG. 3 is a flowchart showing the operation of the computer 12 of the cooling storage 1 according to this embodiment. Further, FIG. 4 is a graph showing a relationship between a rise in the internal temperature of the cooling storage 1 of this embodiment and a delay time, etc., wherein (a) shows the relationship between the temperature gradient and the delay time, and (b) shows the relationship. This is the relationship between the temperature gradient and the abnormality detection temperature.
The cooling storage 1 is, for example, a storage for storing foods and the like, and as shown in FIG.
And a refrigeration unit storage section 3 disposed above the refrigeration unit. The heat-insulating box 2 includes a refrigerator body 4 and a heat-insulating door 6 that is openably and closably attached to an opening 5 on the front surface of the refrigerator body 4. Leg members 7 are fixed to the lower surface of the refrigerator body 4 at six places (three places are shown in FIG. 1), and the cooling storage 1 is placed on the floor via these leg members 7. And so on. In the refrigeration unit storage section 3, a compressor (compressor) 8, a condenser 9, a cooling fan 10, a temperature alarm device 11, and the like are arranged. Here, in FIG. 2, the temperature alarm device 11 includes a computer 12, a temperature detection element 13 (for example, a thermistor sensor) for detecting the temperature inside the heat insulating box 2 of the cooling storage 1, an alarm lamp or an alarm lamp (not shown). And a signal converter 1 for converting an analog signal into a digital signal.
5 and so on. Further, the compressor 8, the condenser 9, and the cooling fan 10 are connected to the computer 12. Then, the temperature detecting element 13 is connected to the signal converter 15.
Further, the signal converter 15 is connected to the computer 12, so that the output of the temperature detecting element 13 is converted into a digital signal by the signal converter 15 for converting an analog signal into a digital signal, and is converted into a digital signal. Is input to In this case, the computer 12 includes a CPU 12a serving as a core of the computer 12 and the CPU 12a.
A memory 12b for storing a program for operating the memory 12a, control data, and the like. In this case, CP
U12a outputs the output of the temperature detecting element 13 to the signal converter 1
5 through the memory 12 as digital data.
b. When the computer 12 detects that the temperature has exceeded the abnormal alarm temperature, the computer 12 blinks the alarm lamp, or the alarm device 14 having a built-in alarm lamp or alarm buzzer. Then, an alarm sound of an alarm buzzer is sounded, or the alarm device 14 is operated in both modes as necessary, to notify the user of the abnormality.

The CPU 12a uses the time measuring function and the calculating function to input the output of the temperature detecting element 13 at predetermined time intervals (for example, every one minute) via the signal converter 15 to obtain digital data. , Can be stored in the memory 12b. Here, the CPU 12a can detect a gradient of a temperature rise or a temperature fall in the inside of the heat insulating box 2, and thus functions as a gradient detecting means. And the heat insulation box 2
The CPU 12a can set the abnormal alarm temperature to be set, for example, between a high abnormal alarm temperature and a low abnormal alarm temperature based on the detection result of the internal temperature rise or temperature decrease gradient. It functions as control means for changing the abnormal alarm temperature. Therefore, when the CPU 12a detects a temperature gradient in which the temperature inside the refrigerator gradually rises, when the low temperature abnormality alarm temperature is reached, the computer 12 drives the alarm device 14, for example, while the temperature rises sharply. When the temperature gradient that rises is detected, the alarm device 14 can be driven when the temperature exceeds the low temperature abnormality alarm temperature and reaches the high temperature abnormality alarm temperature. Further, when the computer 12 drives the alarm device 14, after detecting that the abnormal alarm temperature has been exceeded, a delay time (for example, a short delay time of about several seconds and a delay time of, for example, Can be set as appropriate, so that it functions as control means for changing the delay time.

Next, the operation of the computer 12 based on the detection result of the temperature detecting element 13 will be described. Here, it is assumed that the high-temperature abnormal alarm temperature in the refrigerator set in the computer 12 is, for example, 60 ° C., and the low-temperature abnormal alarm temperature is, for example, 50 ° C. In this case, the numerical values of the high-sound abnormal alarm temperature and the low-temperature abnormal alarm temperature are examples, and are not necessarily limited to these numerical values, and can be changed as necessary. The abnormal alarm temperatures are not necessarily limited to two, but may be set as many as necessary. Moreover, 1 in the storage of the heat insulation box 2
A temperature rise gradient per minute (for example, a temperature rise of several degrees per minute) and a high-sound abnormal alarm temperature (for example, 60
° C) and the low temperature abnormal alarm temperature (for example, 50 ° C),
And the temperature rise gradient per minute in the refrigerator (for example, a temperature rise of several degrees per minute) and the delay time until a warning in the refrigerator (for example, a delay time of several seconds and a delay time of several minutes, for example). The control data indicating the relationship is stored in the memory 12b.
Is stored in First, when the power of the cooling storage 1 is turned on, the computer 12 starts operating, and in step S (hereinafter simply referred to as S) 1, the cooling storage 1 is set to the cooling operation state (S1: YES). Specifically, the compressor 8 and the condenser 9 constituting the cooling device of the cooling storage 1
The cooling fan 10 and the like are started by the computer 12 from the power-on and start the cooling operation. In S2,
The computer 12 determines whether or not the internal temperature of the heat insulating box 2 (numerical data read by the temperature detection element 13) is equal to or higher than a set temperature (the internal temperature of the heat insulating box 2 is set to, for example, 5 degrees). In the case of NO in S2, the computer 12 continues to detect the inside temperature of the heat insulating box 2 (S2). If the computer 12 determines that the temperature is higher than the set temperature (for example, 5 degrees) of the cooling storage 1 (S2: YES), the temperature rise gradient per minute (for example, the temperature rise of several degrees per minute)
Is detected (S3). Next, the computer 12 determines whether the temperature rise gradient is equal to or more than a predetermined value (S4). Then, when a small amount of high-temperature food is put into the storage of the heat-insulating box 2, the computer 12 generates a temperature gradient in which the temperature of the heat-insulating box 2 gradually rises, that is, for example, about several degrees per minute. It is determined that the temperature is equal to or lower than the temperature rise (S4: NO), and a low temperature abnormality warning temperature of, for example, about 50 ° C., and a long delay time of about several minutes before the alarm is issued (S4)
5).

Next, the computer 12 determines whether or not the temperature inside the heat insulating box 2 is equal to or higher than the low temperature alarm temperature (for example, 50 degrees) (S6). If the temperature inside the heat insulating box 2 is equal to or lower than the low temperature alarm temperature (NO in S6), the computer 12
Continues the detection of the internal temperature of the heat insulating box 2 (S6). The temperature inside the heat insulating box 2 is equal to or higher than the low temperature abnormal alarm temperature (S6: Y
In the case of ES), the computer 12 activates the alarm device 14 to generate an alarm (S7). Specifically, FIG.
In the case of the temperature gradient P0 shown in (b), the abnormality detection temperature is set to the low temperature abnormality alarm temperature P3 (for example, 50 degrees), and the delay time in that case is set to the long delay time P5 shown in FIG. As a result, when the temperature in the chamber of the heat insulating box 2 gradually rises and reaches the low temperature abnormality alarm temperature P3, the delay time P5 is set to be long for a predetermined time (for example, in order to prevent unnecessary alarm to the user as much as possible). Wait for a few minutes) and issue an alarm. In the case of this alarm, the user also needs
It is possible to quickly take measures such as temporarily evacuating hot food from inside. As described above, when the computer 12 detects the temperature gradient in which the internal temperature gradually rises (the temperature gradient P0 in FIG. 4B), the high temperature abnormality alarm temperature P2
When the low temperature abnormality alarm temperature P3 is reached, a long delay time P5 (for example, about several minutes) is set, and after the elapse of a predetermined time (for example, about several minutes), the alarm device 14 is driven. As a result, the user is less likely to leave the food or the like in a high-temperature state, it is possible to prevent damage such as decay of the food or the like as much as possible, and as a result of setting the long delay time P5, it is possible to uselessly warn the user as much as possible. Can be prevented.

On the other hand, if a large amount of high-temperature food is put into the storage of the heat-insulating box 2, or if the door of the cooling storage 1 is forgotten to be closed and is kept largely open, the storage of the heat-insulating box 2 The internal temperature rises rapidly, exceeds the low temperature abnormality alarm temperature P3, and reaches the high temperature abnormality alarm temperature P2 in a short time. In that case, when the computer 12 determines that the temperature inside the heat-insulating box 2 rises sharply, that is, it is equal to or higher than a temperature rise of, for example, several degrees per minute (S4: YES), the computer 12 sets the temperature to, for example, 60 ° C. A high temperature abnormal warning temperature and a short delay time, for example, about several seconds before an alarm is issued are set (S8). Next, the computer 12 determines whether or not the internal temperature of the heat insulating box 2 is equal to or higher than the high temperature alarm temperature (for example, 60 degrees) (S9). If the temperature inside the heat insulating box 2 is equal to or lower than the high temperature alarm temperature (NO in S9), the computer 12 continues to detect the temperature inside the heat insulating box 2 (S9). If the temperature inside the heat insulating box 2 is equal to or higher than the high temperature abnormal alarm temperature (S9: YES), the computer 12 activates the alarm device 14 to generate an alarm (S10).

More specifically, the temperature gradient P shown in FIG.
In the case of 1, the abnormality detection temperature is set to the high temperature abnormality alarm temperature P2 (for example, 60 degrees), and the delay time in that case is set to the delay time P4 shown in FIG. Thereby, when the internal temperature rises rapidly and exceeds the low temperature abnormality alarm temperature P3 and reaches the high temperature abnormality alarm temperature P2 in a short period of time, the delay time is shortened without waiting for the elapse of a predetermined time. Since the alarm is immediately issued, the user can quickly take measures such as temporarily evacuating the high-temperature food from the inside of the heat insulating box 2 and closing the heat insulating door 6. As described above, when the computer 12 detects the temperature gradient at which the internal temperature of the refrigerator rises sharply and reaches the high temperature abnormality alarm temperature P2, a short delay time P4
And the alarm device 14 is driven without waiting for a predetermined time to elapse. Therefore, when the temperature in the refrigerator rises to an abnormally high temperature in a short time, the temperature of the abnormal alarm is set higher from the viewpoint of preventing malfunction, so the possibility of erroneous detection is reduced and the user is useless. Such a warning can be prevented as much as possible, and as a result of setting the short delay time P4, the warning is issued as soon as possible, so that damage such as spoilage of foods and the like can be suppressed as much as possible.

As described above, according to the cooling storage 1 of the above-described embodiment, in the temperature alarm device 11 for detecting and alarming the abnormal temperature inside the heat insulating box 2, the temperature inside the heat insulating box 2 can be increased or reduced. Computer 12 for detecting temperature gradient
(Gradient detecting means), a computer 12 (abnormal alarm temperature setting means) for setting an abnormal alarm temperature, and a computer 12 (delay time setting means) for setting a delay time until an alarm is activated after detecting the abnormal alarm temperature. And
Further, based on the detection result of the computer 12 (gradient detecting means), when the gradient of the temperature rise is gentle, the abnormal alarm temperature to be set is lowered to extend the delay time, or the gradient of the temperature rise is steep. In such a case, a computer 12 (control means) for changing the set abnormal alarm temperature and the delay time is provided so as to increase the set abnormal alarm temperature and shorten the delay time. Accordingly, the computer 12 sets the abnormal alarm temperature to be set, for example, between the high abnormal alarm temperature and the low abnormal alarm temperature based on the detection result of the temperature gradient of the internal temperature of the heat insulating box 2 (S3). In addition to the change, the delay time until the alarm is activated after the detection of the abnormal alarm temperature can be changed (S5, S6). When the computer 12 detects a temperature gradient in which the temperature inside the heat insulating box 2 gradually rises, when the low temperature abnormality alarm temperature is reached, the computer 12 sets a long delay time and elapses a predetermined time. , The alarm device 14 is driven (S
7) Therefore, the possibility of erroneous detection is reduced, and useless alarm to the user can be prevented as much as possible.
On the other hand, when the computer 12 detects a temperature gradient in which the temperature inside the heat insulating box 2 rises sharply, and when the temperature reaches the high temperature abnormality alarm temperature, the computer 12 sets a short delay time and waits for the elapse of a predetermined time. And the alarm device 14 is driven (S1
0), even if the temperature in the refrigerator rises to an abnormally high temperature in a short time, the possibility of erroneous detection is reduced,
Unnecessary warnings to the user can be prevented as much as possible. It goes without saying that a device other than the computer 12 may be used instead of the gradient detecting means, the abnormal alarm temperature setting means, the delay time setting means and the control means.
Therefore, in the case of the cooling storage 1 of this embodiment, when a fire occurs in a room or the like where the cooling storage 1 is installed, the temperature alarm device 11 of the cooling storage 1 detects a rise in the temperature in the heat insulating box 2. As a result, an alarm can be issued to the people in the vicinity, so that it plays a role of a fire alarm device and can prevent the occurrence of serious damage.

In the above embodiment, one numerical value (for example, a temperature rise of several degrees per minute) is used to determine whether or not the temperature rise gradient is equal to or greater than a predetermined value. Whether or not the temperature rise gradient is equal to or more than a predetermined value may be determined using a numerical value. Also, the above-described delay time (for example, a short delay time of about several seconds and a long delay time of, for example, about several minutes) is an example, and is not necessarily limited to these values, and can be changed as necessary. For example, the delay time may be set to zero. In addition, the delay time is not necessarily limited to two, and may be set as many as necessary. Note that the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the gist of the present invention. For example, in the above-described embodiment, the refrigerator is used in a commercial cooling storage, but it is not necessarily limited to the configuration, and may be used in a freezer, an ice maker, or the like. Further, the storage is not limited to food, but may be other articles. Further, in addition to detecting the gradient of the rise in temperature, the gradient of the decrease in temperature is detected, and a first low-temperature abnormality alarm temperature and a second low-temperature abnormality alarm temperature are set as abnormality alarm temperatures of the storage for constant temperature. Alternatively, a delay time corresponding to the delay time may be set. Further, it goes without saying that the present invention is not limited to storages such as refrigerators, high-temperature storages, high-humidity storages, showcases, and heat storages, but may be applied to an abnormal temperature warning device for a room such as a normal room. It is needless to say that the present invention is also effective for storages for home use or business use, prefabricated refrigerators, and the like.

[0015]

As described in detail above, according to the first aspect of the present invention, the abnormal alarm temperature set when the temperature rise is gentle is reduced based on the result of detecting the temperature rise or temperature decrease. Alternatively, the set abnormal alarm temperature is changed so as to increase the abnormal alarm temperature set when the temperature rise is steep. Thereby, when the gradient detecting means detects a temperature gradient in which the temperature in the refrigerator or the room gradually rises, the alarm device is driven when the low temperature alarm temperature is reached, so that the user brings the food or the like into a high temperature state. It is less likely to be left unattended, and can minimize damage such as spoilage of foods and the like. On the other hand, when the gradient detecting means detects a temperature gradient in which the temperature in the refrigerator or the room rises sharply, the alarm device is activated when the temperature exceeds the low temperature abnormal alarm temperature and reaches the high temperature abnormal alarm temperature. Even if the temperature in the refrigerator or room rises to an abnormally high temperature in a short time,
The possibility of erroneous detection is reduced, and useless alarm to the user can be prevented as much as possible.

According to the second aspect of the present invention, based on the detection result of the temperature rise or the temperature drop, the abnormal alarm temperature set when the temperature rise is gentle is lowered to extend the delay time. Alternatively, the abnormal alarm temperature and the delay time that are set are changed so that the abnormal alarm temperature that is set when the temperature rise gradient is steep is increased to shorten the delay time. Thereby, when the gradient detecting means detects a temperature gradient in which the temperature in the refrigerator or the room rises slowly, when the low temperature abnormality alarm temperature is reached, a long delay time is set, and the elapse of a predetermined time is waited. As a result, as a result of the alarm device being driven, the user is less likely to leave food or the like in a high-temperature state, and can minimize damage such as spoilage of the food or the like as much as possible, and as a result of setting a long delay time,
Unnecessary warnings to the user can be prevented as much as possible. On the other hand, if a temperature gradient in which the temperature inside the refrigerator or the room rises sharply is detected, the temperature exceeds the low temperature abnormal alarm temperature,
When a high abnormal alarm temperature is reached, a short delay time is set, and the alarm device is driven without waiting for a predetermined time to elapse. Therefore, when the temperature in the refrigerator or the room rises to an abnormally high temperature in a short time, the temperature of the abnormal alarm is set to a high value from the viewpoint of preventing malfunction, so that the possibility of erroneous detection is reduced. It is possible to prevent unnecessary warnings to the user as much as possible. Furthermore, as a result of setting a short delay time, an alarm is issued as soon as possible, so that damage such as spoilage of food or the like can be minimized.

[Brief description of the drawings]

FIG. 1 is a front view of a cooling storage according to this embodiment.

FIG. 2 is an electric block diagram of a cooling storage according to the embodiment.

FIG. 3 is a flowchart showing an operation of the computer of the embodiment.

FIGS. 4A and 4B are graphs showing a relationship between a rise in the internal temperature of the cooling storage and a delay time and the like in this embodiment, wherein FIG. 4A shows the relationship between the temperature gradient and the delay time, and FIG. And the abnormality detection temperature.

FIG. 5 is a graph showing an increase in the internal temperature of a general cooling storage;

[Explanation of symbols]

1 ... cooling storage, 3 ... refrigeration unit storage part, 4
... Refrigerator body, 6 ... Insulated door, 8 ... Compressor, 11 ... Temperature alarm device, 12 ... Computer, 12a ... CPU, 12b ... Memory, 13
... Temperature detecting element, 15 ... Signal converter, 14 ...
・ Alarm device

Claims (2)

[Claims] 1. An abnormal temperature alarm device for detecting and alarming an abnormal temperature in a refrigerator or a room, a gradient detecting means for detecting a gradient of a temperature rise or a temperature decrease, and an abnormal alarm temperature setting means for setting an abnormal alarm temperature. And an abnormal alarm set based on the detection result of the gradient detecting means, which is set when the temperature rise gradient is gentle, or which is set when the temperature increase gradient is steep. An abnormal temperature alarm device comprising a control means for changing a set abnormal alarm temperature so as to increase the temperature. 2. An abnormal temperature alarm device for detecting and alarming an abnormal temperature in a refrigerator or a room, a gradient detecting means for detecting a gradient of a temperature rise or a temperature decrease, and an abnormal alarm temperature setting means for setting an abnormal alarm temperature. And delay time setting means for setting a delay time until the alarm is activated after the detection of the abnormal alarm temperature. Further, the delay time is set when the gradient of the temperature rise is gentle based on the detection result of the gradient detection means. The abnormal alarm temperature setting means is configured to lower the abnormal alarm temperature to increase the delay time, or to increase the abnormal alarm temperature that is set when the gradient of the temperature rise is steep to shorten the delay time. An abnormal temperature alarm device, further comprising control means for changing the abnormal alarm temperature and the delay time set by the delay time setting means.