JPS59973Y2 - Car cooler refrigerant monitoring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for monitoring the refrigerant condition of a car cooler.

Unlike fixed-installation type coolers such as household coolers, car coolers are subject to large vibrations due to vehicle running, so even if the sealing performance is good, leakage of refrigerant from gaps such as joints cannot be avoided.

If there is a shortage of refrigerant due to leaks, the cooling performance will deteriorate, so it is necessary to replenish the refrigerant.Furthermore, especially in car coolers, a large amount of oil is mixed with the refrigerant and circulated, so there may be waste particles attached to the oil. The refrigerant is likely to be contaminated by the refrigerant, and if the contamination of the refrigerant becomes severe, the cooling performance will be degraded.) This will also have an adverse effect on each component of the cooler, so it is necessary to exchange the refrigerant twice.

For this reason, conventionally, a see-through member called a sight glass has been installed in a part of the refrigerant passage, and by monitoring the state of the refrigerant flowing inside the passage, it is possible to check the refrigerant diversion and the degree of contamination of the refrigerant. What I did was b.

However, in the past, such sight glasses were installed in a vertical position, which was impossible to see without opening the hood of a passenger car or opening the engine compartment. Monitoring the sight glass was troublesome and had the disadvantage that it was easy to neglect monitoring.

The present invention has been devised in view of these conventional drawbacks, and provides a refrigerant monitoring device for a car cooler that is configured so that it can be viewed through the opening of the front grill of a vehicle so that the state of the refrigerant can be easily monitored without opening the engine compartment. It is something to do.

The present invention will be explained below based on the drawings.

FIG. 1 shows the configuration of a car cooler, which is composed of a compressor 1, a container 2, a liquid tank 3, and an evaporator 4 connected in a circular path by a refrigerant flow pipe 5, and a refrigerant flow pipe 5 connecting the liquid tank 3 and the evaporator 4. A sight glass 6 is interposed in the middle.

The sight glass 6 is formed by airtightly fitting a glass 6b into the opening surface of a main body case 6a which is connected to the refrigerant flow pipe 5 in communication.

The refrigerant cycle of the car cooler is compressor 1.
The high-pressure refrigerant reaches the condenser 2 where it radiates heat and liquefies. From the condenser 2, the refrigerant passes through the liquid tank 3 and reaches the evaporator 4, where it absorbs the heat of vaporization from the surrounding air and evaporates, before being returned to the compressor 1.

The air cooled by the evaporator 4 is blown into the vehicle interior by a fan for cooling.

In such a car cooler, the sight glass 6 is
As shown in the figure, it is placed facing the opening 7a of the front grill 7 of the vehicle.

In this way, in the tilt cab-over type vehicle shown in FIG. 1, the refrigerant condition can be monitored simply by looking through the sight glass 6 through the opening 7a of the front grill 7 without tilting the cab 8, and the refrigerant amount and This allows you to check the degree of contamination.

The specific way to check the refrigerant condition is that if there are many air particles in the liquefied refrigerant that can be seen through the sight glass 6, there is a shortage of refrigerant, and if the liquefied refrigerant is visible through the sight glass 6, there is a shortage of refrigerant. If it becomes larger, it can be determined that the degree of contamination of the refrigerant is progressing, and in these cases, it is necessary to replenish or replace the refrigerant.

Although FIG. 2 shows an embodiment applied to a tilt cab-over type vehicle, the present invention may also be applied to a hood type vehicle such as a passenger car, and the state of the refrigerant can be checked without opening the hood.

As explained above, according to the present invention, the refrigerant see-through member installed in the refrigerant passage connecting the car cooler's liquid tank and the evaporator is placed so as to face the opening of the front grill, so there is no need to open the engine compartment. Refrigerant can be checked and monitoring performance is improved.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a car cooler according to the present invention equipped with a refrigerant monitoring device, and FIG. 2 is a perspective view showing an embodiment in which the above car cooler is applied to a tilt cab-over type vehicle. 1... Compressor, 2... Capacitor, 3...
Liquid tank, 4... Evaporator, 5... Refrigerant distribution pipe, 6... Sight glass, 7... Front grill.

Claims (2)

[Scope of utility model registration request] (1) In a car cooler configured with a refrigerant circulation circuit that passes through a compressor, a condenser, a liquid tank, and an evaporator, a refrigerant visible member that can see through the refrigerant passage that connects the liquid tank and the evaporator is interposed in the middle of the refrigerant passage. A refrigerant monitoring device for a car cooler, characterized in that a see-through surface of the refrigerant visible member faces an opening of a front dog gnome of a vehicle. (2) The refrigerant monitoring device for a car cooler according to claim 1, wherein the refrigerant visible member is a side glass formed by fitting a glass into a case body that is attached in communication with the refrigerant passage.