JPH025342Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a cooling device having an abnormality alarm device.

Conventionally, there has been a device of this type as shown in FIG.

In the figure, 1 indicates a fin 1a and a cooling pipe 1.
2 is a differential pressure type alarm device, which has a pressure detection end 2a on the suction side of the condenser 1 and a pressure detection end 2b on the outlet side of the condenser 1, and has a pressure detection end 2b on the outlet side of the condenser 1. When the value exceeds a predetermined value, an alarm 2c such as a buzzer or a lamp is configured to issue an alarm. 3 is a blower fan for forcing air into the condenser 1.

Next, the operation will be explained. When oil, dust, etc. adhere to the fins 1a of the condenser 1 and the ventilation resistance of the condenser 1 increases, the pressure difference between the suction side and the outlet side of the condenser 1 increases. Detected by differential pressure alarm device 2. When the differential pressure exceeds a predetermined value, an alarm is issued by the alarm device 2c.

In the cooling device configured in this way, the condenser 1
When a filter is attached to the suction side of a filter to attract oil, dust, etc., a differential pressure between the suction side and the blowout side will occur due to the ventilation resistance of the filter itself. I couldn't attach it properly. Furthermore, if the blower fan 3 for the condenser 1 abnormally stops during cooling operation, there is no differential pressure between the suction side and the blowout side of the condenser 1, so this abnormal condition is not reported. It was hot.

This idea was made in order to eliminate the drawbacks of the conventional ones as described above, and by providing a temperature difference type alarm means, it is possible to issue an appropriate alarm when the operating condition of the condenser becomes severe. The purpose is to provide a cooling device that can

An embodiment of this invention will be described below based on the drawings.

FIG. 2 shows an example of a cooling device according to this invention, and the same parts as in FIG.

In the figure, reference numeral 5 denotes a temperature difference type alarm device, which includes a first temperature sensing element 5a that detects the air temperature on the suction side of the condenser 1, and a first temperature sensing element 5a that is attached to the outlet pipe 4 of the condenser 1. a second temperature-sensing element 5b for detecting the outlet temperature of the condenser 1; and second temperature sensing elements 5a, 5b
When the temperature difference detected by the temperature difference exceeds a predetermined value, an alarm 5c such as a buzzer or a lamp is configured to issue an alarm.

Next, the operation will be explained.

When oil, dust, etc. adhere to the fins 1a of the condenser 1, the heat transfer rate decreases and the condensation temperature increases. An increase in condensing temperature has a greater effect in summer than in winter, reducing cooling capacity and adversely affecting compressor operation. Therefore, the surrounding atmospheric temperature is detected by the first temperature sensing element 5a attached to the suction part side of the condenser 1, and when the temperature is above a predetermined value,
Increase in condensing temperature due to clogging of condenser 1, etc.
The difference between the air temperature on the suction side of the condenser 1 and the temperature on the outlet side of the condenser 1 is compared and determined, and when the difference exceeds a predetermined value, the alarm 5c of the temperature difference type alarm device 5 is activated.
will notify you of an abnormality. Even when a filter (not shown) is attached to the blowing part side of the condenser 1, the increase in condensing temperature is small, so it is possible to actively attach the filter. Further, even if the blower fan 3 for the condenser 1 stops during cooling operation, a similar operation will cause an alarm to be issued.

In the above embodiment, the second temperature sensing element 5b is attached to the outlet pipe 4 of the condenser 1, but it may be attached to the cooling pipe 1b as shown in FIG.

As described above, according to this invention, the air temperature on the suction side of the condenser is equal to or higher than a predetermined value, and the difference between the air temperature on the suction side of the condenser and the temperature of the cooling pipe or outlet piping of the condenser is An alarm is issued when the temperature exceeds a predetermined value, regardless of the presence or absence of a filter, and when the ambient temperature exceeds a predetermined value such as in the summer, or when the blower fan unexpectedly stops, the condenser is activated. It is possible to provide a convenient cooling device that can reliably issue a warning when operation becomes severe.

[Brief explanation of drawings]

Figure 1 is a schematic configuration diagram showing a conventional cooling device;
FIG. 2 is a schematic configuration diagram showing an example of a cooling device according to this invention, and FIG. 3 is a schematic configuration diagram showing another embodiment of this invention. 1...Condenser, 1a...Fin, 1b...Cooling pipe, 4...Condenser outlet piping, 5...Alarm device, 5
a...first temperature sensing element, 5b...second temperature sensing element. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A condenser having fins and a cooling pipe, a first temperature sensing element for detecting the air temperature on the suction side of the condenser, and a second temperature sensing element for detecting the temperature of the cooling pipe or outlet piping of the condenser. Activating an alarm when the temperature detected by the temperature sensing element and the first temperature sensing element is a predetermined value or more, and the difference between the temperatures detected by the first and second temperature sensing elements is more than a predetermined value. A cooling device equipped with a temperature difference type alarm device.