JPS6060461A - Refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a refrigerator comprising a compressor, a condenser, an SG, and a type sieve.

[Background of the invention]

Conventionally, in this type of refrigerator, a method has been adopted in which the liquid level in the condenser is controlled to mainly prevent gas bypass. For this reason, the amount of refrigerant (liquid level) in the evaporator is generally kept constant regardless of the load.

In addition, if the flow control is performed by the orinois, the special purpose inside the evaporator may be cleared when the crew is loaded, but it is not impossible to control the flow at will.
Because it is not possible to significantly control the amount of refrigerant,
There were limits to how much performance could be improved.

On the other hand, in partial load operation in a refrigerator, that is, in a state in which the refrigeration transmission is not operated at full load and the suction vanes are not operated regularly, the performance of the evaporator (heat transfer rate of the heat transfer tubes) is It is lower than that of Kasumi at full load. The reason for this is explained below.

In other words, one of the reasons for the four-turning of the cargo is that the flow velocity of the refrigerant gas in the evaporator is lower than that in full-load operation. In addition, in refrigerant machines using a constituent evaporator, all heat transfer tubes are generally designed so that they are fully exposed to the liquid level during operation that generates 100% of the refrigerating capacity, so in partial load operation, Since the amount of evaporative gas generated also decreases accordingly, the liquid level drops and the upper heat exchanger tube does not come into contact with the liquid level.

[Purpose of investigation]

In view of the above, it is an object of the present invention to improve the performance of the evaporator during partial load operation by controlling the refrigerant in the evaporator according to the refrigeration load.

[Summary of the invention]

In order to achieve the above object, the present invention provides a refrigerator comprising a compressor, a condenser, and a full-scale evaporator, and is provided with a refrigerant storage device that communicates with the condenser and evaporator via a solenoid valve. This is a characteristic feature.

[Embodiments of the invention]

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

In FIG. 1, 1 is a compressor, 2 is a condenser containing two heat exchanger tube groups, and 3 is a heat exchanger tube group 3A and a mi-arc toseverator 11.
4 is a refrigerant storage connected to the evaporator 3 via pressure equalizing conduits 5 and 6, and to the evaporator 3 via pressure equalizing conduit 7; 8 to 10 are pressure equalizing The solenoid valves 12A to 12C provided in the conduits 5 to 7 respectively are the front self-pressure 1
, an arrangement that connects the condenser 2 and the evaporator 3 to each other.
13 is an orifice provided in the evaporator 3vA1 of the evaporator 12B, and through this orifice 13, the length of the finger 2 and the evaporator 3' are widened according to the load. .

As shown in FIG. 2, the refrigerant storage device 4 has longitudinal chambers 4a to 4d partitioned into an arbitrary number (four in the case), and each chamber 4a to 4a VC of -f: solenoid valve(
4 pressure equalizing pipes 5a to 5d and 7a to 7 (not shown)
d are connected to each other.

Fukashio's structure is similar to that of Saturday and Sunday, but at what time does everyone close solenoid valves 8 and 10'i and open solenoid valve 9?
The refrigerant in the R vehicle 2 is transferred to the refrigerant storage 41 via the pressure equalization conduit 6.
/Cp-% and store fully.

- 10,000, At partial load, for example, the refrigeration load is 75%.
! : When is Q medium storage i! The refrigerant from the wholesaler 4d of L unit 4 is introduced into the evaporator 3 through the pressure equalizing conduit 7d, and when the refrigeration load reaches 50 cm, the refrigerant in the room 4C is introduced into the evaporator through the pressure equalizing conduit 7C. 3 will be introduced. The evaporator 3
The relationship between the amount of refrigerant in the tank and the refrigeration load is schematically shown in Fig. 3.

In the evaporator 3, if all the heat transfer tubes 3A are buried in the refrigerant liquid, the heat transfer capacity is 100 cm, but the refrigerant 'fLt
When hI decreases and the upper heat transfer W3A is surrounded by refrigerant gas, the heat transfer performance decreases.

Therefore, at partial load, if the refrigerant liquid in the refrigerant storage 4 is introduced into the evaporator 3 by the amount that the liquid level in the evaporator 3 has decreased,
The heat transfer capacity of the evaporator 3 can be increased to nearly 100%, and mist-up does not occur. This mist-up is determined not only by the height of the refrigerant, but also by the flow rate of the flowing gas. Therefore, when the gas flow rate decreases as at partial load, the liquid level at 100 cm load also increases. Even if the temperature is high, mist-up will not occur. Therefore, very strict requirements regarding the control of the refrigerant replenishment can be avoided.

〔Effect of the invention〕

As explained above, according to the present invention, by arbitrarily tracing the volume of each wholesaler in the refrigerant storage device, the amount of refrigerant in the evaporator can be controlled according to the refrigeration load. In other words, the performance of the evaporator can be improved by maximizing the i=pass ratio of the heat exchanger tubes of the evaporator during partial load operation.

[Brief explanation of the drawing]

Figure 1 is a system diagram showing an embodiment of the uninvented refrigerator;
The figure is a detailed view of the refrigerant storage device of the same embodiment, and FIG. 3 is a diagram showing the relationship between the amount of refrigerant in the evaporator and the refrigeration load of the same embodiment. 1... Compressor, 2... Condenser, 3... Evaporator, 4
...Refrigerant storage, 4a-4d...S, 8-10.
··solenoid valve.

Claims (1)

[Scope of Claims] 1. A refrigerator comprising a compressor, a condenser, and a flooded evaporator, characterized in that a refrigerant storage device is provided that retards the condenser and evaporator via a solenoid valve. Freezer. 2. The refrigerator according to claim 1, wherein the refrigerant storage device is provided with an arbitrary number of rooms partitioned in the longitudinal direction.