JPS6246777B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling device, and an object of the present invention is to reduce noise that is usually called evaporative noise and occurs in the early stages of operation of the cooling device.

Various points have been pointed out as the cause of this evaporative noise, but the methods currently in practical use include reducing the diameter of the tip of the capillary reach tube in multiple stages in order to control the vibration of the capillary reach tube; This includes attaching weights, etc.

That is, in conventional cooling devices used in refrigerators and the like, as shown in FIG. 1, refrigerant enters an evaporator a from a capillary reach tube b, and
The refrigerant circulates through the suction tube C. The capillary tube b and the suction tube c are in contact with each other by soldering or the like at a portion d so as to maintain a heat exchange state. In such equipment, evaporative noise is often seen in the early stages of operation, and the suction tube c.
As shown in FIG. 2, the temperature of the engine becomes extremely low from the normal operating state. This is because the liquid refrigerant enters the evaporator a when the compressor is started, and the unevaporated refrigerant flows through the cycling tube c in a state similar to that of a liquid bag. Early 30's of this drive
The evaporative noise that occurs and disappears over a period of about 120 seconds is caused by the rapid cooling of the capillary tube b by this suction tube c, and normally, as shown in Figure 3, the liquid refrigerant e and the wet refrigerant f are relatively The one that flows in an orderly manner is the capillary reach tube b
As shown in FIG. 4, partial condensation is promoted by cooling of the liquid refrigerant e' and wet refrigerant f' are generated alternately in the capillary tube b, and the evaporator a
This occurs because discontinuous vaporization occurs at the part where the water flows into the water.

The present invention solves the above-mentioned conventional drawbacks, and one embodiment of the present invention will be described below with reference to FIG. 5.

1 is a refrigerator, 2 is a cooler placed inside the refrigerator, and 3 is a capillary tube for reducing the pressure of the refrigerant after condensation, with one end connected to the condenser (not shown) and the other end connected to the inlet section 4 of the cooler 2. It is connected to the. 5 is a suction tube that returns the evaporated refrigerant to the compressor (not shown). 6 is capillary reach tube 3
and the heat exchange section of the suction tube 5. A heating section 7 is provided between the heat exchange section 6 and the inlet section 4, and its outer periphery is surrounded by a heat storage body 8 made of metal, rubber, synthetic resin, or the like having a large heat capacity. This heat storage body 8 is arranged outside the refrigerator 1 so as to have a heat exchange relationship with the outside air.

In this configuration, the heat storage body 8 is in a state where heat is accumulated from the outside temperature while the compressor is not operating. When the compressor starts operating, liquid refrigerant flows into the suction tube 5, and the capillary reach tube 3 is temporarily strongly cooled in the heat exchange section 6, thereby cooling the refrigerant flowing through the capillary reach tube 3. Thereafter, it is heated by the heat storage body 8 in the heating section 7 and flows into the cooling section 2.

Therefore, even if partial condensation of the liquid refrigerant occurs in the heat exchange section 6, it is reheated by the heating section 7, thereby alleviating the occurrence of partial condensation, thereby reducing evaporative noise. Furthermore, after this start-up period has passed, the suction gas temperature also rises and normal operation begins. The heat storage body 8 is then heated by the outside air during the period when the operation is stopped, and the above-described cycle is repeated thereafter. Furthermore, the heat storage body 8 heated by the outside air is used to heat the capillary tube 3, which eliminates the need for a wasteful heat source and is sufficiently effective in reducing evaporative noise.

In this way, the present invention provides a heating section in the capillary reach tube from the heat exchange section between the capillary reach tube and the suction tube to the cooler, and maintains this heating section at a higher temperature than the heat exchange section at the initial stage of operation. Because the heat storage body is arranged in a thermally conductive manner,
Even if the refrigerant is rapidly cooled in the heat exchange section at the beginning of operation and partial condensation of the refrigerant occurs in the capillary reach tube, the refrigerant is reheated in the heating section to reduce the partial condensation of the refrigerant. It is possible to prevent evaporative noise caused by partial condensation of .

[Brief explanation of the drawing]

Figure 1 is a circuit diagram of the main parts of a conventional example of a cooling device.
Figure 2 is a characteristic diagram showing the temperature change in the suction tube at the beginning of the same startup, Figure 3 is a diagram showing the refrigerant state inside the capillary reach tube during normal operation, and Figure 4 is a diagram showing the refrigerant state inside the capillary reach tube at the beginning of the same operation. FIG. 5 is a system diagram showing an embodiment of the cooling device of the present invention. 2...Cooler, 3...Capillary reach tube,
5...Suction tube, 6...Heat exchange section, 7
... Heating section, 8 ... Heat storage body.

Claims (1)

[Claims] 1 A heat exchange section is formed in which a compressor, a condenser, a capillary reach tube, a cooler, a suction tube, etc. are connected in a ring, and the capillary reach tube and suction tube are arranged in a heat exchange relationship, and the heat exchange A cooling device in which a heating section is provided in a capillary reach tube between the heat exchange section and the cooler, and a heat storage body that is maintained at a higher temperature than the temperature of the heat exchange section at the start of operation is disposed in the heating section in a thermally conductive manner.