JPH0894220A - Alarm device for abnormal heat radiation in cooling apparatus - Google Patents

Abstract

PURPOSE: To improve reliability of a cooling apparatus in relation to fluctuations of an external air temperature and a load. CONSTITUTION: A temperature detecting means 8, an external air temperature detecting means 9, a decision means 10 for a temperature curve set at every external air temperature and a storage unit 11 are provided. An alarm device is connected to the temperature detecting means 8, the external air temperature detecting means 9 and the storage unit 11, reads a temperature detected by the temperature detecting means 8 immediately before the stopping of a compressor 1, and compares the temperature thus read with the result of the decision means 10. Accordingly, the alarm device is constituted of an arithmetic unit 12 for judging whether or not the temperature exceeds the result of the decision means 10, a counting unit 13 for counting the number of times which exceeds the result of the decision means 10, a control unit 14 for producing an indicating signal of warning, a display unit 15 for indicating the warning and an operation unit 16 for resetting the warning display.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat radiation abnormality warning device for a cooling device such as a vending machine, a showcase, and a commercial refrigerator.

[0002]

2. Description of the Related Art In recent years, a heat radiation abnormality warning device for a cooling device such as a vending machine, a showcase, and a commercial refrigerator has been disclosed.
As disclosed in Japanese Patent No. 238275, by mounting a filter clogging detection device, it is possible to know the clogging of the filter accurately, and to operate the cooling device with low power consumption and high cooling efficiency. Was becoming.

An example of a heat radiation abnormality warning device for a cooling device such as a vending machine, a showcase, and a commercial refrigerator will be described below with reference to the drawings. In FIG. 12, 1 is a compressor, 2 is an evaporator, and a condenser 3 that constitutes a refrigeration cycle together with the evaporator 2 is disposed, and the condenser 3 is cooled by an outside air taken in through a filter. In the device, the first temperature sensor 4 for detecting the temperature of the condenser 3, the second temperature sensor 5 for detecting the ambient temperature of the evaporator 2, and the first temperature sensor 4 have the first setting. A filter clogging detection device is provided with a warning lamp 6 that lights up when the temperature of the second temperature sensor 5 is equal to or higher than the second preset temperature, and a filter clogging detection device. It is possible to know accurately, and the cooling device can always operate with low power consumption and high cooling efficiency.

[0004]

However, the above-mentioned conventional structure has a drawback that the clogging of the filter due to the fluctuation of the outside air temperature cannot be accurately known because there is no outside air temperature sensor. However, the temperature sensor 5 does not fall below the second set temperature, and the clogging of the filter cannot be accurately known.

The present invention solves the conventional problems, and provides a heat radiation abnormality warning device for a cooling device, which can detect a heat radiation abnormality of the cooling device in response to fluctuations in the outside temperature and even in an uncooled state. With the goal.

[0006]

To achieve this object, a heat radiation abnormality warning device for a cooling device according to the present invention comprises a temperature detecting means such as a thermistor for detecting the temperature of the cooling device such as a condenser outlet pipe surface, and a thermistor. Outside temperature detection means such as, the determination means of the temperature curve set for each outside temperature, a storage unit for storing the determination means, the temperature detection means and the outside temperature detection means and connected to the storage unit, Just before the compressor is stopped, the temperature of the temperature detection means is read and compared with the determination means of the storage unit to determine whether or not the temperature exceeds the determination means; A counting unit that counts the number of times exceeding the means, a control unit that is connected to the arithmetic unit and the counting unit, and that issues a warning instruction signal when the number of times exceeding the judging unit reaches a plurality of times in total, Connected to the controller, A display means such as a liquid crystal panel that displays a warning response to an instruction signal of the serial warning, connected to the controller, and a manipulation unit of Kibodo such as resetting the warning display.

Further, it is composed of a timer which is connected to the control unit and which sets a period for counting the number of times the judgment means is exceeded.

Further, it comprises a control unit for resetting the count of the number of times the judgment means has been exceeded when the predetermined times judgment means has not been exceeded.

Further, it comprises a control section for issuing a warning instruction signal when the judgment means is exceeded a predetermined number of times in succession.

Further, a timer connected to the control unit for measuring the elapsed time from the start of the compressor, and a constant time when the compressor is continuously operating even after a constant time has elapsed after the start. After the lapse of time and immediately before the compressor is stopped, the temperature detection means is combined with the temperature to give a reading instruction, and the control section determines whether or not the temperature exceeds the determination means.

[0011]

The heat radiation abnormality warning device of the cooling device of the present invention is provided with the outside air temperature detecting means, and when the temperature read by the temperature detecting means is equal to or higher than the temperature curve set for each outside air temperature, the heat radiation abnormality warning is displayed. You can

Further, by providing a timer connected to the control unit for designating a period for counting the number of times, and setting the period arbitrarily and easily in the timer, it is possible to reduce the load when the outside temperature is low or the like. The warning display of abnormal heat radiation can be displayed except the period.

Further, by further comprising a control unit for resetting the count of the number of times the judgment means is exceeded when it does not exceed the predetermined number of times judgment means in succession, it is possible to eliminate the cumulative count at the time of an abnormality or pull-down. The warning display for abnormal heat radiation can be displayed accurately.

By continuously counting the number of times exceeding the judgment means instead of counting cumulatively, it is possible to more accurately display the warning of abnormal heat radiation except for the cumulative count at the time of pull-down.

Further, a timer for measuring the elapsed time from the start of the compressor is further provided, and when the compressor is continuously operated for a fixed time after the start, the temperature is measured after the fixed time and immediately before the compressor is stopped. By also reading the temperature of the detection means, it is possible to give a warning display of heat radiation abnormality during continuous operation under high load.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A heat radiation abnormality warning device for a cooling device according to a first embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a heat radiation abnormality warning device for a cooling device according to a first embodiment of the present invention, and the description of the same structure as the conventional example will be omitted.

Reference numeral 8 is a temperature detecting means for detecting the temperature of the condenser outlet pipe surface or the like. Reference numeral 9 denotes an outside air temperature detecting means, which includes a sensor such as a thermistor and detects the ambient temperature of the cooling device. Reference numeral 10 is a determination means, and a temperature curve is set as a heat radiation abnormality according to the outside air temperature. A storage unit 11 stores the determination unit 10. Reference numeral 12 denotes the determination means 10 stored in the storage unit 11 and the temperature detection means 8
This is a calculation unit that determines whether or not the temperature detected in step S4 has exceeded. Reference numeral 13 is a counting unit that counts the number of times the judgment means 10 is exceeded. Reference numeral 14 denotes a control unit which outputs a warning signal when the number of times the judgment means 10 exceeds the predetermined number reaches a predetermined number, and the signal is output to a display means 15 such as a liquid crystal panel to display a warning of heat radiation abnormality. To do. Reference numeral 16 is an operation unit such as a keyboard for resetting the warning display.

Reference numeral 17 denotes the judging means 10 and the storage unit 1.
1, the calculation unit 12, the counting unit 13, the control unit 14
It is a control box provided with.

The operation of the heat dissipation abnormality warning device of the cooling device configured as described above will be described with reference to FIG.

In STEP 1, the determination means 10 sets a temperature curve A for abnormal heat radiation for each outside air temperature. Further, it is set to output a warning signal when the number of times exceeding the judging means 10 reaches B cumulatively, and the number K of times exceeding the judging means 10 is set to 0.

At STEP 2, the temperature T of the cooling device immediately before the compressor 1 is stopped is read by the temperature detecting means 8.

At STEP 3, when the temperature T read at STEP 2 is equal to or higher than the temperature curve A which indicates a heat radiation abnormality for each outside air temperature, at STEP 4, the counting unit 13 counts the number of times K once.

At this time, in STEP3, when the temperature T read in STEP2 is less than the temperature curve A which is a heat radiation abnormality for each outside air temperature, the process returns to STEP2.

In STEP 5, when the cumulative number K counted in STEP 4 is equal to or greater than the cumulative number B at which a warning signal is issued, in STEP 6, a warning signal is issued via the control section 14, and the signal is emitted to the display means 15 due to heat radiation abnormality. Warning is displayed.

At this time, in STEP 5, when the cumulative number K is less than or equal to the cumulative number (B-1) at which a warning signal is issued, STEP 2
Return to.

As described above, according to the present embodiment, by providing the outside air temperature detecting means 9, when the temperature T read by the temperature detecting means 8 is equal to or higher than the temperature curve A set for each outside air temperature, the heat radiation abnormality occurs. By displaying a warning, the cooling device can be protected more accurately in response to changes in the outside air temperature and reliability can be improved.

Next, a heat radiation abnormality warning device for a cooling device according to a second embodiment of the present invention will be described with reference to the drawings.
The detailed description of the same configurations as the conventional example and the first embodiment will be omitted.

FIG. 4 shows a heat dissipation abnormality warning device for a cooling device according to a second embodiment of the present invention. 18 is a timer
Is connected to the control unit 14a, and the determination unit 1
Set the period for counting the number of times exceeding 0.

The operation of the heat dissipation abnormality warning device of the cooling device configured as described above will be described with reference to FIG.

In STEP 1, the determination means 10 sets a temperature curve A for abnormal heat radiation for each outside air temperature. Further, it is set that a warning signal is output when the number of times exceeding the judging means 10 reaches cumulatively, and a period for counting the number of times exceeding the judging means 10 is set to C. The number K of times over is set to 0.

In STEP 2, L is set to 0 and the counting of the counting period is started. In STEP 3, the temperature T of the cooling device immediately before the compressor 1 is stopped is read by the temperature detecting means 8.

In STEP 4, at the time when the temperature T read in STEP 3 is equal to or higher than the temperature curve A indicating the heat radiation abnormality for each outside temperature, in STEP 5, the counting unit 13 counts the number of times K once.

At this time, in STEP 4, when the temperature T read in STEP 3 is less than the temperature curve A which is a heat radiation abnormality for each outside air temperature, the process returns to STEP 3.

In STEP 7, when the period L counted in STEP 6 is within the period designated by the timer-18 and when the counted cumulative number K is equal to or greater than the cumulative number B at which a warning signal is issued, the control section 14a is controlled in STEP 8. A warning signal is issued via the warning signal, and this signal causes the display means 15 to display a warning of heat radiation abnormality.

However, when the period L counted in STEP 6 is outside the period designated by the timer-18, STEP 1
Return to. When the cumulative number K counted in STEP 7 is less than or equal to the cumulative number (B-1) of issuing a warning signal, S
Returning to TEP3 As described above, according to the present embodiment, the timer -18 that is connected to the control unit 14a and sets the period for counting the number of times is provided, and the period is arbitrarily and easily set by the timer-18. By doing so, a warning display for abnormal heat radiation is displayed except during periods of low load such as low outside temperature,
The cooling device can be protected more accurately except when the load is low, and the reliability can be improved.

Next, a heat release abnormality warning device for a cooling device according to a third embodiment of the present invention will be described with reference to the drawings.
For simplification, detailed description of the same configurations as the conventional example, the first embodiment, and the second embodiment will be omitted.

FIG. 6 shows a heat radiation abnormality warning device for a cooling device according to a third embodiment of the present invention.

Reference numeral 14b is a control unit, which resets the count of the number of times the judgment means 10 is exceeded when the predetermined number of times judgment means 10 is not exceeded.

The operation of the heat dissipation abnormality warning device of the cooling device configured as described above will be described with reference to FIG.

In STEP 1, the determination means 10 sets a temperature curve A for abnormal heat radiation for each outside air temperature. Further, it is set that a warning signal is issued when the number of times exceeding the judging means 10 reaches cumulatively, and when the number of times not exceeding the judging means 10 reaches C continuously, it exceeds the judging means 10. Set to reset the count of the number of times Also,
Furthermore, the number of times K1 that exceeds the determination means 10 is set to 0,
The number of times K2 that does not exceed the determination means 10 is set to 0.

In STEP 3, the temperature T of the cooling device immediately before the compressor 1 is stopped is read by the temperature detecting means 8.

In STEP 4, at the time when the temperature T read in STEP 3 is equal to or higher than the temperature curve A indicating the heat radiation abnormality for each outside air temperature, the counting unit 13 counts the number of times K 1 once in STEP 5.

At this time, in STEP 4, when the temperature T read in STEP 3 is less than the temperature curve A which indicates the heat radiation abnormality for each outside air temperature, in STEP 7, the counting unit 13 counts K2.
Is counted once.

At STEP 9, when the cumulative number K1 counted at STEP 6 is equal to or greater than the cumulative number B at which a warning signal is issued, a warning signal is issued via the control section 14b, and the signal is issued to the display means 15 for warning of heat radiation abnormality. Is displayed.

When the continuous number K2 counted in STEP8 reaches C times, the process returns to STEP1.

However, in STEP 6, the cumulative number K1
Is equal to or less than the cumulative number (B-1) of issuing warning signals, and S
In TEP8, when the continuous number K2 is (C-1) or less, in STEP2 the number K that does not exceed the determination means 10
Reset the count of 2.

As described above, according to the present embodiment, the control unit 14 that resets the count of the number of times the judgment means 10 is exceeded when the predetermined times judgment means 10 is not exceeded.
By including b, the warning display of the heat radiation abnormality can be more accurately displayed excluding the cumulative count at the time of abnormality and pull-down, and the cooling device can be protected more accurately and the reliability can be improved.

Next, a heat dissipation abnormality warning device for a cooling device according to a fourth embodiment of the present invention will be described with reference to the drawings.
For simplicity, the conventional example, the first embodiment, the second embodiment,
Detailed description of the same configurations as those of the third embodiment will be omitted.

FIG. 8 shows a heat dissipation abnormality warning device for a cooling device according to a fourth embodiment of the present invention.

Reference numeral 14c is a control unit which outputs a warning display signal when the judgment means 10 is exceeded a predetermined number of times in succession.

The operation of the heat radiation abnormality warning device of the cooling device constructed as described above will be described with reference to FIG.

In STEP 1, the determination means 10 sets a temperature curve A for abnormal heat radiation for each outside air temperature. Further, it is set to issue a warning signal when the number of times exceeding the judgment means 10 reaches B continuously.

In STEP 2, the number K of times the judgment means 10 is exceeded is set to 0. In STEP 3, the temperature T of the cooling device immediately before the compressor 1 is stopped is read by the temperature detecting means 8.

At STEP 4, when the temperature T read at STEP 3 is equal to or higher than the temperature curve A indicating abnormal heat radiation for each outside temperature, at STEP 5, the counting unit 13 counts the number K once.

At this time, in STEP 4, when the temperature T read in STEP 3 is less than the temperature curve A which indicates the heat radiation abnormality for each outside air temperature, the process returns to STEP 2.

At STEP 6, when the number of consecutive times K counted at STEP 5 is equal to or more than the number of consecutive times B at which the warning signal is issued, at STEP 7, a warning signal is issued via the control section 14c, and the signal is emitted to the display means 15 due to heat radiation abnormality. Warning is displayed.

At this time, in STEP 6, when the continuous number K is less than or equal to the continuous number B-1 at which a warning signal is issued, the process returns to STEP 3.

As described above, according to the present embodiment, the number of times exceeding the judgment means is continuously counted instead of being cumulatively counted, and when abnormal, the heat radiation abnormality is more accurately excluded except for the cumulative count at the time of pull-down. The warning display can be displayed.

Next, a heat release abnormality warning device for a cooling device according to a fifth embodiment of the present invention will be described with reference to the drawings.
The detailed description of the same configurations as the conventional example, the first example, the second example, the third example, and the fourth example will be omitted.

FIG. 10 shows a heat radiation abnormality warning device for a cooling device according to a fifth embodiment of the present invention.

Reference numeral 14d denotes a control unit, which adjusts the temperature of the temperature detecting means after the elapse of a certain period of time and immediately before the stop of the compressor 1 when the compressor 1 is continuously operated even after a certain period of time has elapsed after starting. Then, a reading instruction is given, and it is judged whether or not the judgment means 10 is exceeded.

Reference numeral 18a is a timer which is connected to the control unit 14d and measures the elapsed time since the compressor 1 was started.

The operation of the heat radiation abnormality warning device of the cooling device configured as described above will be described with reference to FIG.

In STEP 1, the determination means 10 sets a temperature curve A for abnormal heat radiation for each outside air temperature. Further, it is set to output a warning signal when the number of times the judgment means 10 exceeds the cumulative number reaches B, and when the compressor 1 is continuously operated even after a lapse of a fixed time after starting. The number of times K1 that exceeds the determination unit 10 is set to 0, and the number of times K2 that exceeds the determination unit 10 is set to 0 immediately before the compressor 1 is stopped.
Further, the sum K of K1 and K2 is set to 0.

In STEP 2, when the compressor 1 has been operating for a certain period of time, in STEP 4, when the temperature T of the cooling device at that time is equal to or higher than the temperature curve A which indicates heat radiation abnormality for each outside air temperature, the counting unit 13 in STEP 5 Count K2 once.

In STEP 2, the temperature T of the cooling device immediately before the compressor 1 is stopped is read by the temperature detecting means 8 in STEP 3 when the compressor 1 has not been continuously operated after a certain period of time.

At STEP 6, when the temperature T read at STEP 3 is equal to or higher than the temperature curve A indicating abnormal heat radiation for each outside temperature, at STEP 7, the counting unit 13 counts the number K1 once.

At this time, in STEP 6, when the temperature T read in STEP 3 is less than the temperature curve A which is the heat radiation abnormality for each outside air temperature, and in STEP 4, the temperature T of the cooling device during continuous operation is the heat radiation abnormality for each outside air temperature. When the temperature is less than the temperature curve A, the process returns to STEP2.

At STEP 8, the sum K of the cumulative number K1 and the cumulative number K2 counted at STEP 5 and STEP 7 is obtained.

In STEP 9, S is reached when the cumulative number K obtained in STEP 8 is equal to or greater than the cumulative number B at which a warning signal is issued.
The TEP 10 outputs a warning signal via the control unit 14d to display a warning of heat radiation abnormality on the display means 15.

At this time, in STEP 9, when the cumulative number K is less than or equal to the cumulative number (B-1) at which the warning signal is issued, STEP 2
Return to.

As described above, according to this embodiment, the timer for measuring the elapsed time from the start of the compressor 1
18a, the continuous operation under high load by continuously reading the temperature of the temperature detecting means 8 after the elapse of a certain time and immediately before the stop of the compressor 1 when the continuous operation is performed even after a certain time has elapsed after the start. The warning display of the heat radiation abnormality at the time is displayed, and the warning display of the heat radiation abnormality can be displayed more accurately.

[0074]

As described above, according to the present invention, temperature detecting means such as a thermistor for detecting the temperature of the cooling device such as the surface of the condenser outlet pipe, outside temperature detecting means such as a thermistor, and each outside temperature are set. Temperature curve determination means, a storage unit that stores the determination unit, the temperature detection unit, the outside air temperature detection unit and the storage unit, and reads the temperature of the temperature detection unit immediately before the compressor is stopped, An arithmetic unit for comparing the determination unit of the storage unit to determine whether the number exceeds the determination unit; a counting unit connected to the arithmetic unit for counting the number of times the determination unit is exceeded; A control unit connected to the control unit and the counting unit, which outputs a warning instruction signal when the number of times the judgment unit exceeds the cumulative number reaches a predetermined number, and a control unit which is connected to the control unit and receives the warning instruction signal. LCD panel to display Since it is composed of an operating unit such as a keyboard connected to the control unit and resetting the warning display, such as a keyboard, when the temperature read by the temperature detecting unit is equal to or higher than the temperature curve set for each outside air temperature, A warning display for abnormal heat radiation is displayed, and the cooling device can be protected more accurately in response to fluctuations in the outside temperature and reliability can be improved.

Further, since the timer is connected to the control unit and sets a period for counting the number of times the judgment means is exceeded, it is possible to set the period arbitrarily and easily in the timer. The warning display for abnormal heat radiation is displayed except when the load is low such as outside temperature, and the cooling device can be protected more accurately except when the load is low, and reliability can be improved.

Further, since the control unit resets the count of the number of times the judgment means is exceeded when the predetermined times judgment means is not exceeded, in the event of an abnormality,
Except for the cumulative count when pulling down, the warning display of the heat radiation abnormality is displayed more accurately, the cooling device can be protected more accurately, and the reliability can be improved.

Further, since it comprises a control unit which issues a warning instruction signal when the number of times exceeds the judgment means for a predetermined number of times continuously, the number of times exceeding the judgment means is continuously counted instead of being accumulated. When an abnormality occurs, the warning display for the heat radiation abnormality is displayed more accurately, excluding the cumulative count when pulling down, and the cooling device can be protected more accurately and the reliability can be improved.

Further, a timer connected to the control unit for measuring an elapsed time after the compressor is activated, and a timer for continuously operating even if a predetermined time has elapsed after the compressor is activated. After a certain period of time and immediately before the compressor is stopped, the temperature is detected by the temperature detection means, and a read instruction is issued to determine whether or not the temperature exceeds the determination means. A warning display for abnormal heat radiation is displayed to more accurately protect the cooling device and improve reliability.

[Brief description of drawings]

FIG. 1 is a block diagram of a heat radiation abnormality warning device of a cooling device according to a first embodiment of the present invention.

FIG. 2 is a refrigeration cycle diagram of a heat dissipation abnormality warning device for a cooling device according to an embodiment of the present invention.

FIG. 3 is a flowchart of FIG.

FIG. 4 is a block diagram of a heat radiation abnormality warning device for a cooling device according to a second embodiment of the present invention.

5 is a flowchart of FIG.

FIG. 6 is a block diagram of a heat radiation abnormality warning device of a cooling device according to a third embodiment of the present invention.

FIG. 7 is a flowchart of FIG.

FIG. 8 is a block diagram of a heat radiation abnormality warning device for a cooling device according to a fourth embodiment of the present invention.

9 is a flowchart of FIG.

FIG. 10 is a block diagram of a heat dissipation abnormality warning device for a cooling device according to a fifth embodiment of the present invention.

11 is a flowchart of FIG.

FIG. 12 is a refrigeration cycle diagram of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 8 Temperature detecting means 9 Outside air temperature detecting means 10 Judging means 11 Storage section 12 Computing section 13 Counting section 14 Control section 14a Control section 14b Control section 14c Control section 14d Control section 15 Display means 16 Operating section 17 Control box 18 Timer-18a Timer-

Claims (5)

[Claims] 1. In a cooling device such as a vending machine or a refrigerator, a temperature detecting means such as a thermistor for detecting the temperature of the cooling device such as a condenser outlet pipe surface, an outside air temperature detecting means such as a thermistor, and an outside air temperature. A plurality of temperature curve determination means set accordingly, a storage section for storing the determination means, the temperature detection means, the outside air temperature detection means, and the storage section are connected, and the temperature detection is performed immediately before the compressor is stopped. An operation unit for reading the temperature of the means and comparing it with the determination unit of the storage unit to determine whether the temperature exceeds the determination unit, and the number of times the operation unit is connected and connected to the operation unit is counted. A counting unit, a control unit that is connected to the arithmetic unit and the counting unit, and that outputs a warning instruction signal when the number of times the judgment unit exceeds the cumulative number reaches a predetermined number, is connected to the control unit, and outputs the warning. Received the instruction signal of A heat dissipation abnormality warning device for a cooling device, comprising a display unit such as a liquid crystal panel for displaying a warning and an operation unit such as a keyboard connected to the control unit for resetting the warning display. 2. A timer, which is connected to the control unit, and which sets a period for counting the number of times when the number of times the judgment means is exceeded is provided.
A heat dissipation abnormality warning device for the cooling device described. 3. The heat radiation abnormality warning device for a cooling device according to claim 1, further comprising a control unit for resetting a count of the number of times the judgment means is exceeded when the predetermined number of times the judgment means is not exceeded. 4. The heat radiation abnormality warning device for a cooling device according to claim 1, further comprising a control unit which outputs a warning instruction signal when the judgment means is continuously exceeded a predetermined number of times. 5. A timer connected to the control unit, for measuring the elapsed time from the start of the compressor, and a fixed time after the compressor has been continuously operating for a fixed time after the start. 5. The cooling according to any one of claims 1 to 4, further comprising a control unit that gives a reading instruction together with the temperature of the temperature detection means immediately before the compressor is stopped and determines whether or not the temperature exceeds the determination means. Device heat radiation abnormality alarm device.