JPS6026267A - Alarm device for temperature of cooling storehouse - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a temperature alarm device that issues a temperature alarm in response to changes in the internal temperature of a cooling storage, and particularly relates to a temperature alarm device that issues a temperature alarm in response to changes in the internal temperature of a cooling storage. The present invention relates to a temperature alarm device for a cooling storage that controls temperature alarms.

(b) Conventional technology For example, cooling operation control that controls the cooling operation of a refrigerated storage such as a prefabricated refrigerator-freezer according to changes in the internal temperature, and maintains the internal temperature at a temperature preset on the internal temperature setting switch. In the device, the temperature alarm device installed in the cooling operation control device warns that when the temperature inside the refrigerator becomes higher than the set alarm upper limit temperature, the temperature inside the refrigerator rises due to the defrosting operation of the cooler and the temperature inside the refrigerator temporarily increases. A temperature alarm is issued by lighting up a light emitting element such as a light emitting diode when a preset alarm exclusion period continues to distinguish between a drop in internal temperature and a rise or fall in internal temperature due to poor control of cooling operation, etc. Further, when the temperature inside the refrigerator becomes lower than the alarm lower limit temperature and the temperature continues for an alarm exclusion period, a temperature alarm is issued by lighting the light emitting element. Every time the set value of the internal temperature is changed, it is necessary for the manager of the cooling storage facility to newly set the alarm upper limit temperature, alarm lower limit temperature, and alarm exclusion time in Section 11. The adjustment work is extremely complicated, and
There were times when the values set through adjustment work were not necessarily the optimal values. In addition, because the adjustment work was complicated, there were times when no setting work was performed at all. For example, if the internal temperature is set to 10°C, the difference between the set temperature and the alarm upper limit temperature and alarm lower limit temperature is set to 3°C, and the alarm exclusion time is set to 120 minutes, for example, the internal temperature is set to 120 minutes. For example, if you set it to 2℃, the set upper limit temperature is 4℃, the lower limit temperature is 2℃, and the alarm upper limit temperature is 7℃.
The operation of the temperature alarm device when the alarm lower limit temperature is set to 11°C will be explained. When the temperature inside the refrigerator drops to 0℃ or less due to supercooling operation of the refrigerator, the temperature inside the refrigerator is 0℃.
If the following conditions continue, an alarm will be displayed after the temperature inside the refrigerator has fallen to 11 degrees centigrade of the alarm lower limit temperature and 120 minutes, which is the alarm exclusion time, have elapsed. Therefore, if it takes a long time for the internal temperature to drop from 0°C to -11°C, the refrigerated products in the refrigerator will freeze before the internal temperature drops below 0°C and an alarm is displayed. Occur. Also, when the internal temperature is set to -3°C, the set upper limit temperature is set to -11°C, the lower limit temperature is set to -13°C, the alarm upper limit temperature is set to 2°C, and the alarm lower limit temperature is set to -6°C. For example, even though the load inside the warehouse increases due to the loading or unloading of products into the warehouse, the operation of the cooling device t does not start and the temperature inside the warehouse rises, and if the temperature continues to exceed 1°C, an alarm is issued. The warning display is performed after the exclusion time of 120 minutes has elapsed. Therefore, if it takes a long time for the temperature inside the refrigerator to rise from 0℃ to 1℃, the surface temperature of the frozen product inside the refrigerator will rise before the temperature inside the refrigerator drops below 0℃ and the alarm is displayed. This caused condensation to form on the surface, leading to a decline in quality.

Furthermore, since the alarm exclusion time is set to 120 minutes regardless of the set temperature of the cooling storage, for example, if a refrigerated product is stored in the cooling storage, the internal temperature is set to 10°C, and the set upper limit temperature is 12°C, When the lower limit temperature is set to 10°C, the alarm upper limit temperature is set to 15°C, and the alarm lower limit temperature is set to 5°C, the refrigerator does not operate even though the internal load increases, and the internal temperature drops. When the temperature rises, an alarm exclusion time passes from when the temperature inside the refrigerator reaches the alarm upper limit temperature of 15℃ until the alarm is displayed, during which time the temperature inside the refrigerator rises and a cycle of quality deterioration of refrigerated products occurs. At the same time, an alarm exclusion time elapses after the temperature inside the refrigerator reaches 5°C, which is the alarm lower limit temperature, due to continuous cooling operation, until the alarm is displayed in the same way as above, and during that time, the temperature inside the refrigerator decreases to 0. If the temperature is lower than ℃, the refrigerated product may freeze, resulting in a significant deterioration in the quality of the refrigerated product.

e→ Purpose of the Invention The present invention automatically sets an alarm lower limit temperature and an alarm upper limit temperature for outputting a temperature alarm based on a set value of the internal temperature by a temperature alarm device of a cooling operation control device of a cooling storage. At the same time, the system automatically sets the alarm exclusion time and issues an optimal temperature alarm for each set point in the refrigerator to ensure that abnormalities in the temperature inside the refrigerator are detected and to prevent quality deterioration of stored products.1-
Ru.

B) Structure of the Invention The present invention includes a data reading unit that manually inputs the set value and measured temperature value of the internal temperature of a refrigerated storage, and inputs data signals from the data reading unit [7] and generates a temperature alarm signal. An alarm upper limit temperature setting section and an alarm lower limit temperature setting section that set the upper limit temperature and lower limit temperature to be output, input data signals from the data reading section and input operation signals from the respective setting sections, and set the upper limit temperature. As described above, an alarm output control device includes an alarm exclusion time setting section that sets an alarm exclusion time from when the internal temperature of the trap reaches the lower limit temperature to when the temperature alarm signal is outputted, and It consists of an alarm device that outputs a temperature alarm using a temperature alarm signal from an alarm output control device, and the alarm lower limit temperature, alarm upper limit temperature, and alarm exclusion time are automatically set according to changes in the internal temperature set value. This makes it extremely easy to change the temperature of the product, and also reliably issues a temperature alarm to notify abnormalities in the temperature inside the refrigerator, thereby reliably preventing deterioration in the quality of stored products.

(E) Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

Figure 1 is a schematic circuit diagram of the cooling operation control device, where (1) is the control device, (2) is the temperature data output circuit, (3) is the operation control section, (4) is the display circuit, and (5) is the display. changeover switch,
(6) is a defrost setting section. Here, the control device (1)
is provided with an alarm output control device (IA), and this alarm output control device (IA) has a data reading section (which inputs setting data and temperature measurement data from the temperature data output circuit (7)).
8), and an alarm upper limit temperature setting section (9) that inputs a data signal from this data reading section (8) and automatically sets the upper limit temperature for outputting a temperature alarm signal in accordance with the set temperature inside the refrigerator. , an alarm lower limit temperature setting section 00) that automatically sets the lower limit temperature for outputting a temperature alarm signal in accordance with the set temperature inside the refrigerator, and a data reading section (8) that inputs a data signal and sets the alarm upper limit temperature. Input operation signals to start counting from the temperature setting section (9) and alarm lower limit temperature setting section α0), and start counting from when the internal temperature reaches the upper limit temperature and from when it falls below the lower limit temperature. and an alarm exclusion time setting section (11) that delays the alarm output for an alarm exclusion time that is automatically determined in accordance with a preset internal temperature.

The temperature data output circuit (2) includes a temperature setting section α3) made of, for example, a variable resistor, a temperature width setting section Oa for setting the width of the set temperature, and a temperature range setting section Oa that is attached to a cooler (not shown) to detect the temperature of the cooler. A defrosting recovery temperature sensor circuit (hereinafter referred to as the first sensor circuit) (16
), a sensor circuit (hereinafter referred to as the second sensor circuit) 08) for regulating the temperature inside the refrigerator to which a second temperature sensing element 07) that detects the temperature inside the cooling storage such as a prefabricated refrigerator is connected, and the temperature setting device 08). part (13) and temperature range setting part 04);
The second sensor circuits (16) and (18) are connected, and the analog signals sent from each are converted into digital signals and output to the control device (1), as well as being output from the control device (1). It is composed of an A-D converter section that inputs a data selection signal and data sending timing, etc.

The operation control circuit (3) has its emitter grounded and the collector terminals of the first to fourth operation control transistors 01) to 01, which are NPN type, are connected to the collector terminal voltage, and the energization is controlled by turning on and off the respective transistors for alarm output. The relay coil C and the defrosting heater relay coil 06), the blower relay coil that circulates cold air in the refrigerator (5), the compressor control relay coil (c), the base of each transistor and the control device ( 1) and a resistor (29) connected between the two.

The display circuit (4) has seven segment first and second fluorescent display tubes connected to the control device (1) via a plurality of output lines t3 to which resistors are connected, respectively. The collectors are connected to the display tubes 02) and (2), and the emitter-grounded NPN type first and second transistors are connected to the control device (1), and the control device (1)
) between the collector of this transistor 07) and the output line Gυ. Connect the current limiting resistor (
The temperature warning device is composed of a light emitting diode (40) for displaying an alarm and a light emitting diode (41) for displaying a minus value, which are connected through a wire with the collector direction being the forward direction.

The display changeover switch (5) is composed of, for example, a rotary switch, and is connected to the control device (1) as well as to the switching junction j1 (4) connected to the power supply line via the resistor (42).
3, the internal temperature display terminal (5A), and the control device (
1) connected to the terminal for displaying the removed waste return temperature (hereinafter referred to as the defrosting terminal) (5B), for displaying the set temperature (hereinafter referred to as the terminal for set temperature) (5C), and for displaying the temperature range of the set temperature. It consists of terminals (hereinafter referred to as set temperature width terminals) (5D), and by switching the switching contacts (4 moats), the waste removal temperature, set temperature, and set temperature range are displayed on the display circuit (4).

In addition, the dust removal setting-ttB (61 is the defrosting operation interval setting switch θ4 connected to the control device (1)), the defrosting time setting switch (45), and the connection between each setting switch and the power line (46). Hereinafter, the operation of the cooling operation control device will be explained.

First, connect the display changeover switch (5) to the setting temperature terminal (5C
), the temperature setting signal is input to the control device (1) via the A and -D converter, and the first and second display circuits (4) are switched to
The set temperature is determined while displaying the temperature on the second fluorescent display tube C32+ (33). Next, the display changeover switch (5)
is switched to the set temperature range terminal (5D), and the first and second fluorescent display tubes c321. Set the set temperature range while displaying the temperature on the C33+. From now on, display changeover switch (5)
Switch to the internal temperature display terminal (5A), and connect the display circuit (
4) to display the temperature inside the refrigerator. Next, the defrost operation interval is set to, for example, 8 hours by the defrost operation interval setting switch (44), and the defrost time is set to, for example, 30 minutes by the oil removal time setting switch (451). outputs a control signal to the operation control circuit (3) based on the data set above to control the respective relay coils (2ω, 06) and Cη.
The cooling operation is controlled by energization and de-energization in (a).

After making the settings as described above, for example, the temperature setting section 03
) and the temperature range setting unit (14J) and the temperature measurement value of the temperature inside the refrigerator from the second temperature sensing element αη are compared in the control device (1), and the temperature is measured. When the data is greater than or equal to the set data, the control device R (1) sends a high level signal (hereinafter referred to as H signal) which is an operation signal to the third and fourth operation control transistors (23) (21) of the operation control circuit (3). ), and the third and fourth operation control transistors (c), C
I! (a) is turned on, the blower relay coil (27) and the compressor control relay coil (28) are energized, and cooling operation is started. Also, when the temperature inside the refrigerator decreases due to the cooling operation and the temperature measurement value drops to the set value, a low level signal (hereinafter referred to as the low signal) which is an operation stop signal is sent to the third and fourth operation control transistors (23L (241). ) is given, and the third and fourth operation control transistors I23), C
! The blower relay coil 07) and the compressor control relay coil (2 coils are de-energized and the cooling operation stops. Furthermore, after the previous defrosting operation is completed, the defrosting operation interval setting switch (individually) is turned on. When the set time has elapsed and the defrosting operation start time comes, the control device (1) outputs an H signal to the second operation control transistor (2) and also outputs the H signal to the third and fourth operation control transistors (t23), ( An L signal is output to 2→, and the defrost heater relay coil (20 is energized to start the defrosting operation of the cooler, and at the same time, the cooling operation is stopped. From then on, the cooler temperature is lowered by the defrosting operation. The temperature rises to the monthly temperature after defrosting, or the defrosting time setting switch (451
The defrosting operation ends when the set time elapses, whichever comes first.

The setting and operation of the temperature alarm will be explained below. Alarm output control device (IN) provided in the control device (1)
The upper limit temperature and lower limit temperature for outputting a temperature setting signal determined based on the set value of the internal temperature are set in advance.For example, as shown in Figure 3, the internal temperature is set by the temperature setting section 03). is set to 10°C, and the set temperature range is set to 2°C in the temperature range setting section (14), and when the internal temperature is controlled between the internal control temperature of 10°C and 12°C, the temperature The set value is A from the setting section (L3) and temperature range setting section <14).
- The upper limit temperature is given to the alarm output control device (IA) through the D converter and automatically outputted by the alarm upper limit temperature setting section (9).
The alarm lower limit temperature setting section (10) is set to 14℃, which is higher than ℃.
K automatically sets the alarm lower limit temperature to 3°C, which is 7°C lower than the internal control temperature, as shown by the dashed line, until the temperature alarm is issued after the internal temperature rises to the alarm upper limit temperature. The second alarm exclusion time and the second alarm exclusion time from when the internal temperature drops to the alarm lower limit temperature until the temperature alarm is issued are set to 30 minutes and 120 minutes, respectively, by the alarm exclusion time setting section (Jl). be done. Here, set the alarm upper limit temperature to 1
The reason for setting the temperature at 4℃ is to prevent quality deterioration of refrigerated items, and the time from when the internal temperature exceeds the alarm upper limit temperature until the temperature alarm is issued is set as long as 120 minutes. The reason for this is to distinguish between an increase in temperature inside the refrigerator due to defrosting operation of the cooler and an increase in temperature inside the refrigerator due to a failure of the refrigeration system.

In addition, the temperature inside the refrigerator is set to, for example, 2°C, which is close to 0°C, using the temperature setting section (I3) as shown in Fig. 3G), and the set temperature range is set to 2°C at the temperature range setting section (I→). When the internal temperature is controlled between 2°C and 4°C, which is the internal control temperature, the alarm upper limit temperature setting section (9) automatically sets the VC9 alarm upper limit temperature as shown by the chain line. The alarm lower limit temperature setting part 00) is set to 9℃, which is 7℃ higher than the inner control temperature, for example.
The alarm lower limit temperature is automatically set to 1℃, which is 1℃ lower than the internal control temperature, as shown by the dashed line, and the first alarm exclusion time and second alarm exclusion time are set to 20 minutes and 12 minutes.
It is set to 0 minutes by the alarm exclusion time setting section α1). Here, the reason why the alarm lower limit temperature is set to 1°C, which is slightly 1°C lower than the internal control temperature, and the first alarm exclusion time is set to a short time of 20 minutes is due to the continuous operation of cooling operation, etc. This is to prevent a delay in displaying that the temperature inside the refrigerator has dropped and to prevent refrigerated items from freezing. In addition, when the temperature inside the refrigerator is set to 0℃ or higher but close to 0℃, the alarm upper limit is set in advance for each refrigerator temperature setting data to prevent freezing of refrigerated items. An alarm upper limit temperature, an alarm lower limit temperature, and an alarm exclusion time are set by the temperature setting section ([3)] and the alarm lower limit temperature setting section (14I and the alarm exclusion time setting section α1).

Furthermore, the temperature inside the refrigerator is 0°C as shown in Figure 3 (for example, 0°C).
Set the temperature setting part α3) to 1°C, which is close to When controlled, the alarm upper limit temperature setting section (9) automatically sets the alarm upper limit temperature to 0℃, which is 2℃ higher than the internal control temperature, as shown by the chain line, and the alarm lower limit temperature setting section θO) automatically sets the alarm upper limit temperature to 0℃, which is 2℃ higher than the internal control temperature. Generally, the alarm lower limit temperature is set to −JO℃, which is 7℃ lower than the internal control temperature, as shown by the dashed line, and the first alarm exclusion time and second alarm exclusion time are both set to 90 minutes. It is set by section α1). Here, the alarm upper limit temperature is set to 0°C, which is slightly higher than the internal control temperature, and the second alarm exclusion time is set to be shorter than when the internal temperature is set to a value of 0°C or higher. This is to ensure that the quality of the frozen product is prevented from deteriorating due to melting by providing an earlier notification that the temperature inside the refrigerator is continuing to rise due to the lack of continuous cooling operation. Furthermore, the reason why the first alarm exclusion time was extended to 90 minutes is that as long as the temperature inside the refrigerator is lower than the set temperature, the frozen state of the items is maintained and there is very little deterioration in the quality of the items. As mentioned above, when the temperature inside the refrigerator is set to a temperature lower than 0℃ and close to 0℃ and the products are stored frozen, the alarm upper limit temperature is set according to the setting data of the refrigerator temperature in advance to prevent the products from melting. An alarm lower limit temperature and an alarm exclusion temperature are set.

Also, as shown in Figure 3), set the temperature setting part α3) to 20°C away from 0°C, and set the salinity range to 4°C in the temperature width setting part 04). However, when controlling the internal temperature between -16°C and -20°C, the alarm upper limit temperature is automatically set to -10°C, which is 6°C higher than the internal control temperature, as shown by the chain. The alarm lower limit temperature is automatically set to -26°C, which is 6°C lower than the internal control temperature, as shown by the dashed line.
Both alarm exclusion times are automatically set to 120 minutes.

Here, the alarm upper limit temperature and alarm lower limit temperature are preset to -10°C and -30°C, respectively, and the first and second alarm exclusion times are both preset to 120 minutes. This is because melting of items that are kept in a frozen state can be prevented by setting each item as described above, and as long as the item is kept in a frozen state, there is very little deterioration in the quality of the item.

As mentioned above, the alarm upper limit time, depending on the set value of the internal temperature,
When the alarm lower limit time and the first and second alarm exclusion times are set in advance, the time (T
The cooling operation continues from , ), and the internal temperature gradually decreases, and at time (T, ), the internal temperature exceeds the lower limit temperature (E, ) of internal control temperature [F], and then at time (T3) The temperature drops below the alarm lower limit temperature (F,), and before the first alarm exclusion time (T4) has elapsed, it rises again due to the cooling operation being stopped and reaches the time (T).
5), when the alarm lower limit temperature (20 or higher, alarm display and alarm notification are not performed.Also, when the cooling operation continues, the internal temperature falls below the alarm lower limit temperature CF1). If the state below the alarm lower limit temperature (Fl) continues for the first alarm exclusion time (T4), the time (T?
) A temperature alarm signal I is sent from the control device (lj to the alarm display NPN transistor 0'0 of the display circuit (4).
(The signal is given intermittently, and the alarm display light emitting diode (41) and the minus display light emitting diode (4I) blink to indicate that the temperature inside the refrigerator is abnormal.
The control device (1) outputs an H signal to the first operation control transistor (21) of the operation control circuit (3), and outputs an H signal to the alarm output relay coil C! ■ is a notification device (not shown) such as a buzzer installed on the side wall of the prefabricated refrigerator-freezer, which is energized and whose operation is controlled by the energization and de-energization of the good news output relay coil (to), which is located away from the cooling operation control device. is energized and operates to issue an alarm. When the administrator becomes aware of the abnormality through the alarm display and notification and forcibly stops the cooling operation, the temperature inside the refrigerator gradually rises and at time (F8), when the temperature inside the refrigerator becomes higher than the lower limit temperature (Fl) of the alarm, The control device (1) outputs an L signal to the alarm display NPN type transistor C3n and the first operation control transistor 01), and the alarm display light emitting diode (40) and the minus display light emitting diode (41) stop blinking. As soon as the warning display ends,
The alarm output relay coil 0!5) is de-energized and the alarm device such as a buzzer stops issuing an alarm.

From then on, the temperature inside the refrigerator is maintained within the internal control temperature CEl, but
As the cooling operation continues to stop, the temperature inside the refrigerator gradually rises, exceeding the upper limit temperature (F2) of the control temperature inside the refrigerator (D) at time (T,), and reaching the alarm upper limit temperature (F2) at time (T, O). Even if F2) is exceeded, the cooling operation will restart before the second alarm exclusion time (To) has elapsed.If the internal temperature becomes lower than the alarm upper limit temperature (F2) at time (T+z), an alarm will be displayed and No alarm notification is given.Furthermore, as the cooling operation continues to stop, the temperature inside the refrigerator gradually rises, reaching the alarm upper limit temperature (F2) or higher at time (T+s), and thereafter reaching the alarm upper limit temperature (F2).
If the above condition continues for the second alarm exclusion time (T□1),
At time (1'+4), the display circuit (4) is switched from the control device (1) to the display circuit (4).
) is intermittently given an H signal to the alarm display NPN transistor 07), and the alarm display light emitting diode (41)
will flash to indicate an abnormal temperature inside the refrigerator. Furthermore, at this time,
Since no power is supplied from the control device (1) to the light emitting diode (4υ) for displaying the eggplant, the control device (1) is connected to the operation control circuit (3).
An alarm is issued by outputting an H signal to the first operation control transistor C'l) and energizing the alarm output relay (c). When the administrator becomes aware of the abnormality through the alarm display and notification and forcibly restarts the cooling operation, the temperature inside the refrigerator gradually decreases, and when it becomes lower than the alarm upper limit temperature (F2) at time (T+5), the control device (1) outputs an L signal to the alarm display NRN type transistor 07) and the first operation control transistor 0]), and the alarm display light emitting diode (40) stops blinking and the alarm display ends. The relay coil (2!19) is de-energized and the alarm notification is stopped.After that, the cooling operation is started based on the change in the temperature inside the refrigerator detected by the second temperature sensing element α force of the temperature data output circuit (2). Control takes place.

Therefore, by setting the internal temperature of the cooling storage, the alarm upper limit temperature is automatically set by the alarm upper limit temperature setting section (9) in the control device (1), and the alarm lower limit temperature setting section α0) The lower limit temperature is automatically set, and the first and second alarm exclusion times are automatically set by the alarm exclusion time setting section Ql)K, and the alarm upper limit temperature, alarm lower limit temperature, and There is no need for administrators to manually adjust the alarm exclusion time, making it extremely easy to change the set temperature in the refrigerator. When the alarm upper limit temperature or alarm lower limit temperature is exceeded and the condition continues for a predetermined period of time determined by the set value of the refrigerator temperature, an alarm is displayed and an alarm notification is performed, so the administrator can check the temperature inside the refrigerator by defrosting the cooler. It is possible to reliably notify that the temperature inside the refrigerator has increased or decreased due to a failure of the cooling device, rather than an increase in the temperature. Furthermore, the difference between the internal control temperature and the alarm upper limit temperature and alarm lower limit temperature is changed by the set value of the internal temperature,
When the set value of the internal temperature is set to a temperature higher than 0°C and away from 0°C, the difference between the internal control temperature and the alarm upper limit temperature is set small in advance, and when the temperature is set to a temperature close to 0°C, By presetting a small difference between the internal control temperature and the alarm lower limit temperature, it is possible to prevent the quality of refrigerated items from deteriorating, and to reliably prevent the items from freezing. Furthermore, when the temperature inside the refrigerator is set to a temperature lower than 0℃ and close to 0℃, the difference between the internal control temperature and the alarm lower limit temperature is set small in advance to prevent frozen items from melting. This can prevent quality deterioration.

In addition, the difference between the internal control temperature and the alarm upper limit temperature is set in advance to a large value of, for example, 7°C, and the difference from the alarm lower limit temperature is preset to a small value of, for example, 1°C. (Even if it is fixed, the alarm upper limit temperature and alarm lower limit temperature will be automatically changed as in the above example as the set value of the refrigerator temperature changes.) This can be done extremely easily, and the temperature inside the refrigerator should be reduced to 0, such as 2℃.
When the temperature is set to a temperature close to 0° C. or higher, it is possible to prevent refrigerated items from freezing.

(f) Effects of the Invention The present invention provides a temperature alarm device that issues a temperature alarm in response to changes in the internal temperature of a cooling storage, which includes a data reading section for inputting internal temperature setting data and temperature measurement data, and an alarm upper limit. A cooling storage comprising an alarm output control device including a temperature setting section, an alarm lower limit temperature setting section, and an alarm exclusion time setting section, and an alarm device that outputs a temperature alarm in response to a temperature alarm signal from the alarm output control device. Because it is a temperature alarm device,
When the set value of the internal temperature is changed, the alarm upper limit temperature, alarm lower limit temperature, and alarm exclusion time are automatically set in accordance with the set value, and when the set value of the internal temperature is changed, the respective temperatures mentioned above are automatically set. There is no need to manually adjust the temperature and time, making it extremely easy to change the temperature inside the refrigerator. Temperature alarms are reliably issued to prevent quality deterioration of items in the cooling storage.

demon

[Brief explanation of the drawing]

A temperature state diagram showing an example of the temperature setting of the alarm output control device, FIG. 3 is a diagram showing the internal temperature M (j) of the cooling storage. (1)...control device, (IA)...alarm output Control device, (8)...Data reading section, (9)...Alarm upper limit temperature setting section, (1(++-...Alarm lower limit temperature setting section, (11)...Alarm exclusion time setting section, (40
)...Light-emitting diode for alarm display. -32

Claims (1)

[Claims] 1. In a temperature alarm signal that issues a temperature alarm in response to a change in the internal temperature of the cooling storage, a data reading unit that inputs the set value and measured temperature value of the internal temperature of the cooling storage, and data from the data reading unit an alarm upper limit temperature setting section that inputs a signal and sets an upper limit temperature that outputs a temperature alarm signal; and an alarm lower limit temperature setting section that inputs a data signal from the data reading section and sets a lower limit temperature that outputs a temperature alarm signal. Then, a data signal is inputted from the data reading circuit to generate a temperature alarm signal after the temperature inside the refrigerator becomes above the temperature alarm output upper limit temperature and after the temperature inside the refrigerator becomes below the temperature alarm output lower limit temperature. an alarm output control device comprising an alarm exclusion time setting section for setting an alarm exclusion time until output and inputting an operation signal from each of the setting sections; 1. A temperature alarm device for a cooling storage, comprising: a temperature alarm device that outputs a temperature alarm based on a temperature alarm signal that is output when the temperature alarm signal is output.