JPS6227820Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved configuration of a cooling device, and particularly to cooling a plurality of cooling vessels to a predetermined temperature using a refrigerant cycle having a single refrigerant compressor.

Conventionally, this type of cooling device cools multiple cooling containers using a refrigerant cycle with a single compressor.
When the evaporators attached to each cooling body are piped in parallel to each other, it is desirable that each cooling container is cooled on the average, but in reality, the refrigerant is distributed biased towards the side with lower piping resistance or the side with a smaller cooling load. do. Therefore, one of them is preferentially cooled, and when this prioritized cooling container reaches a predetermined temperature, substantially all of the circulating refrigerant comes to flow into the other cooling container. However, during this switching, a large amount of liquid refrigerant remains in the evaporator of one cooling container that has been completely cooled, and the amount of refrigerant flowing to the evaporator of the other cooling container is insufficient, which increases the cooling time of the other cooling container. It took a long time, and one of the cooling containers was overcooled. Especially if the inlet end of the evaporator extends long in the vertical direction,
A large amount of liquid refrigerant remained in the inflow end portion extending in the vertical direction, and this tendency was significant. In addition, the applicant first filed Utility Application No. 1983-40041 (later, Utility Model Application No. 1987-40041).
152587), in which the evaporator is wound so that the refrigerant flows from the bottom to the top of the cooling container, a large amount of liquid refrigerant remains in most of the evaporator. This has the disadvantage that the evaporation surface at the upper part of the evaporator tends to become very dry, and the entire evaporation surface is not effectively utilized, resulting in low evaporation efficiency.

This proposal was made in view of the above-mentioned facts, and is intended to prevent liquid refrigerant from remaining in one evaporator whose refrigerant flow is blocked by a solenoid valve, thereby eliminating the refrigerant shortage in the other evaporator. At the same time, the purpose is to improve the evaporation efficiency of each evaporator.

In order to achieve this objective, the present invention is equipped with a refrigerant cycle configured by sequentially connecting a compressor, a condenser, a dryer, a capillary reach tube, a plurality of evaporators, etc. The evaporators are arranged in parallel with each other in the refrigerant cycle, and the refrigerant flow to each of these evaporators is controlled by a solenoid valve, and each of the evaporators is arranged in a plurality of cooling vessels in a heat exchange relationship, The inflow end of each evaporator is located above the outflow end so that the refrigerant flows from the top to the bottom of each cooling container, and the inflow end is located approximately near the top of the evaporator, and the It has a configuration in which it is connected in communication with the capillary reach tube.

According to the present invention configured in this way, the liquid refrigerant in the evaporator of one cooling container that has completed cooling naturally flows down from the inflow end toward the outflow end and flows out from the evaporator. There is no remaining liquid refrigerant in the evaporator, and refrigerant shortage in the other evaporator is eliminated. Further, since the liquid refrigerant supplied to the plurality of evaporators flows down without accumulating in a part of each evaporator, the entire evaporation surface of the evaporator is effectively utilized, improving evaporation efficiency.

An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes an exterior body having a base 2 at its lower part, and a vertically elongated machine room 3 is formed at the rear of the exterior body, extending both upward and downward. 4 is a compressor fixed on the base 2 at the lower part of the machine room 3; 5 is a condenser fixed approximately horizontally at a suitable position in the machine room 3; 6 is a dryer; 7 and 8 are first and second compressors. 2 electromagnetic valves, 9 and 10 are first and second capillary reach tubes, and these components constitute a refrigerant cycle. 11 is the condenser 5
A blower installed directly above the housing 1 forces the compressor 4, condenser 5, etc. to discharge air sucked into the machine room 3 from the intake hole 12 on the lower side wall of the exterior body 1 through the exhaust hole 13 on the top plate 1a. It is cooling down.

Reference numerals 14 and 15 denote a pair of first and second cooling containers located in front of the upper half of the machine room 3 and installed in parallel and independently in the exterior body 1; are each formed of a stainless steel plate into a bottomed cylindrical shape with an upper opening, and the upper part thereof is supported in contact with the opening edge of the upper surface plate portion 1a of the exterior body 1 via an annular seal member fitted to an outward flange at the upper end. The lower part is fixed by a U-shaped support fitting 16. Reference numerals 17 and 18 denote first and second evaporators which are spirally wound around the outer peripheral surfaces of the cooling containers 14 and 15, respectively, in a heat exchange relationship, and are components of a pre-packed refrigerant cycle. Reference numerals 19 and 20 denote first and second liquid supply pipes that are attached to the bottoms of the cooling containers 14 and 15 and discharge the stored liquid, respectively, and are made of a soft elastic member such as silicone rubber. 21 and 22 are levers 23 and 2
4 opens and closes the middle of the liquid supply pipes 19 and 20, respectively, and 25 and 26 are first and second liquid supply valves such as gas thermostats that are in contact with the outer surfaces of the bottom walls of the cooling containers 14 and 15, respectively. and a second thermostat, 2
Reference numeral 7 denotes a heat insulating material that is pre-formed or filled with foamed polystyrene or the like to surround both of the cooling containers 14 and 15.

Reference numerals 28 and 29 denote removable lids that are attached to the upper openings of the cooling containers 14 and 15, and are made of synthetic resin and formed into a circular shape. 30 is the first cooling container 1
The inner lid 30 is made to float above the liquid level of the wine, etc. in the cooling container 14.The inner lid 30 is made by punching out a resin sheet made of polypropylene, polyethylene, etc., which has a lighter specific gravity than the wine, etc., and has an outer diameter slightly smaller than the inside diameter of the cooling container 14. It is formed into a disk shape with a diameter dimension. A similar inner lid is also provided on the second cooling container 15.

The first and second evaporators 17 and 18 are connected to each other from the dryer 6 through first and second electromagnetic valves 7 and 8 and first and second capillary reach tubes 9 and 10, respectively, so that they are parallel to each other. They are branched and merged at or before the accumulator 31. Therefore, the refrigerant flow to each evaporator 17, 18 is as follows:
It is controlled by opening and closing electromagnetic valves 7 and 8. These electromagnetic valves 7 and 8 are energized and controlled by opening and closing a first thermostat 25 and a second thermostat 26, which open and close by sensing the temperatures of the cooling vessels 14 and 15, respectively, directly or indirectly.

Furthermore, first and second evaporators 17 and 18 are wound around the first and second cooling containers 14 and 15, respectively.
are the first and second capillary reach tubes 9, 10
The cooling containers 14 and 15 are wound so that the inflow side is located above the outflow side so that the refrigerant flows from the top to the bottom of each cooling container 14, 15 as shown by the arrow in FIG. There is.

Inlet end 1 of the first and second evaporators 17, 18
7A and 18A are the first and second cooling containers 14, respectively;
The capillary reach tube 9, 10 terminates at a portion covered with a heat insulating material 27 near the top of each evaporator 17, 18 near the opening side of the capillary reach tube 15.
are arranged upright along the sides of the cooling containers 14 and 15, respectively, and are connected to the inlet ends 17A and 18A of the evaporators 17 and 18, respectively.

The capillary reach tubes 9 and 10 are located in the machine room 3.
The partition plate 32 that covers the lower surface of the heat insulating material 27 and the through holes 33, 34, 35, 36 bored in the heat insulating material 27
The inlet ends 17A, 1 of the evaporators 17, 18 rise up along the cooling vessels 14, 15 through the
8A, but the through holes 33, 3
4, 35, and 36 are drawn out into the machine room 3 after winding the cooling containers 14 and 15, respectively, and are connected to the suction pipe 3 of the compressor 4.
This is for passing through the outlet ends 17B and 18B of the evaporators 17 and 18, which are connected to the evaporators 17 and 18 via the accumulator 31 and the like. Therefore, the capillary reach tube 9,1
0 has a smaller pipe diameter than the outlet ends 17B, 18B of the evaporators 17, 18, respectively, and there are through holes 33, 34, 3 along the outlet ends 17B, 18B.
Through holes 33, 34, 3 to penetrate through holes 5, 36
It is only necessary to slightly enlarge the sizes of capillary reach tubes 5 and 36, and there is no need to provide through holes dedicated to the capillary reach tubes 9 and 10, respectively. 38 and 39 are the so-called bundled capillary reach tubes 9, 10 and the evaporator 17,
This is a heat insulating cover made of a heat insulating material such as foamed polyethylene that covers the outer periphery of the outlet ends 17B and 18B of 18.

With such a configuration, for example, one of the first cooling containers 14
When cooling is preferentially performed, this first cooling container 1
4 reaches a predetermined temperature, the first solenoid valve 7 is activated and closed by the detection of the first thermostat 25, and substantially the entire amount of refrigerant from the compressor 4 that has passed through the condenser 5 is transferred to the second evaporator via the second solenoid valve 8. It is supplied and distributed to the vessel 18. And the first evaporator 17 attached to the first cooling container 14
The accumulated liquid refrigerant naturally flows down from the upper inlet end 17A toward the lower outlet end 17B, and since the upper inlet end 17A is located approximately near the top, the solenoid valve 7 controls the refrigerant flow. There is no accumulation of liquid refrigerant in the first evaporator 17 whose flow is blocked, and a correspondingly large amount of refrigerant is allowed to flow into the second evaporator 18, thereby preventing a shortage of refrigerant in the second evaporator 18. Moreover, since the liquid refrigerant supplied to both evaporators 17 and 18 flows from the top to the bottom without stagnation, the dryness of the entire evaporation surface of the evaporators 17 and 18 is small, and these can be used effectively. , evaporation efficiency is improved.

Since the present invention is configured as described above, it is possible to efficiently cool multiple cooling containers with a simple structure, and when one cooling is stopped due to preferential cooling, liquid refrigerant flows into the stopped evaporator. There is no shortage of refrigerant in the evaporator which cools the other container due to a large amount remaining, and as a result, each cooling container can be cooled to a predetermined temperature in a short time, and overcooling is less likely to occur. Further, since the refrigerant flows through each of the plurality of evaporators from the top to the bottom, the evaporation surface of each evaporator is effectively utilized, and the evaporation efficiency can be improved. Moreover, the capillary reach tube has a smaller pipe diameter than the inlet end of the evaporator and is easier to bend, so it is easy to design and manufacture, and there is almost no evaporation of the refrigerant and no condensation on the outer surface. There is no dripping into the machine room, and the insulation cover can be simplified.

[Brief explanation of the drawing]

Fig. 1 is a front view of the cooling device of the present invention, Fig. 2 is a schematic longitudinal sectional side view of the same, Fig. 3 is a longitudinal sectional front view of the same main part,
FIG. 4 is a diagram of the refrigerant circuit. 14, 15... Cooling container, 9, 10... Capillary reach tube, 17, 18... Evaporator.

Claims (1)

[Scope of utility model registration request] A refrigerant cycle is provided in which a compressor, a condenser, a dryer, a capillary reach tube, a plurality of evaporators, etc. are sequentially connected, and the plurality of evaporators are connected in parallel to each other in the refrigerant cycle. Furthermore, the refrigerant flow to each of these evaporators is controlled by a solenoid valve, and each of the evaporators is installed in a plurality of cooling containers in a heat exchange relationship, and the refrigerant is directed from the upper part to the lower part of each cooling container. The inflow end of each evaporator is located above the outflow end so that the evaporator flows through the evaporator, and the inflow end is located near the top of the evaporator to communicate with the capillary reach tube. Cooling system.