JPS5920612Y2 - Refrigeration equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a refrigeration system in which a compressor, a condenser, a capillary tube, an evaporator, and a gas-liquid separator are sequentially connected in an annular manner.

This type of refrigeration equipment is shared between 60 Hz power supply district and 53 Hz power supply district, but if you try to make effective use of the evaporator without providing an evaporator and a superheating area, it is necessary to change the resistance value of the capillary tube to 60H2 It must be set so that the degree of superheating of the refrigerant at the evaporator outlet during operation is approximately zero.

Then, during 50Hz operation, the amount of liquid refrigerant that cannot be completely evaporated in the evaporator will be larger than during 60H2 operation, and the surplus B will not be stored in the gas-liquid separator 5', but will be sent to the oil return hole, as shown in Figure 3. There is a problem that the liquid returns to the compressor 1 through 6' and has an adverse effect on the compressor 1, such as causing liquid compression.

For this reason, in general, the resistance value of the capillary tube is set so that the degree of superheating of the refrigerant at the evaporator outlet during 5QHz operation under standard load conditions is approximately zero to prevent a large amount of liquid from returning during 5QHz operation. However, if you do this, 6
There is a problem in that the degree of superheat of the refrigerant at the outlet of the evaporator increases during 0 Hz operation, and a superheat degree region is formed in the evaporator, making it impossible to use the evaporator effectively, and that the refrigerating capacity during 60 Hz operation decreases.

This proposal was made in view of this problem, and in a refrigeration system in which a compressor, a condenser, a capillary tube, an evaporator, and a gas-liquid separator are sequentially connected in a ring, the resistance value of the capillary tube is set to a standard load. 60 H2 in state
The degree of superheating of the refrigerant at the outlet of the evaporator during operation is set to be approximately zero, and the gas-liquid separator is set to have a main portion in which return liquid refrigerant is constantly stored during 60H2 operation under standard load conditions; 50 in communication with the main part and under standard load condition
It is formed with an auxiliary part in which a surplus of the return liquid refrigerant during Hz operation is stored, which is larger than that during 60 Hz operation, and the main part is located below and the auxiliary part is located above the above-mentioned communicating position between these two parts. The above problem is solved by providing oil return holes in each case, and one embodiment thereof will be described below with reference to the drawings.

In Figure 1, 1 is a refrigerant compressor, 2 is a condenser, 3 is a capillary tube, 4 is an evaporator, and 5 is a gas-liquid separator consisting of a main part 7 and an auxiliary part 8, and these elements are arranged in order. They are connected in a ring to form a refrigeration cycle.

As shown in FIG. 2, the outlet side pipe 9 of the evaporator 4 is connected to the main part 7 of the gas-liquid separator 5, and the suction pipe 10 of the compressor 1 is also connected to the main part 7. It opens at the top and has an oil return hole 6 at the bottom of the main portion 7.

Further, the auxiliary portion 8 includes a suction pipe 11 branched from the suction pipe 10.
are connected so that they open at the top.

The main part 7 and the auxiliary part 8 are communicated by a communication pipe 12, and the part below the communication position 13 of the main part 7 is lubricated with lubricating oil during 60Hz operation under standard load condition, as shown in Fig. 2A. The volume is set so that the effluent liquid refrigerant from the evaporator 4 containing the refrigerant can be constantly stored as shown by the diagonal line A, and the part below the communication position 14 of the auxiliary part 8 is a standard one as shown in the opening in FIG. The volume is set so as to be able to store at least a surplus of the liquid refrigerant returned from the evaporator 4 to the gas-liquid separator 5 during 5Q Hz operation in a loaded state, as shown by the diagonal line B, which is larger than that during 60 Hz operation. An oil return hole 15 is provided in the suction pipe 11 at a position higher than the communication position 14.

Therefore, when operating in a 60 Hz power supply district, the degree of superheating of the refrigerant at the outlet of the evaporator 4 becomes approximately zero, and the evaporator is effectively utilized to achieve high refrigerating capacity. As shown by the diagonal line A in Figure A, liquid refrigerant is constantly stored, but is not stored in the auxiliary part 8, and only liquid refrigerant containing the amount of oil shown by the diagonal line a flows from the oil return hole 6 to the compressor 1. Since it does not return, it does not adversely affect the compressor 1.

Next, when operating in a 5Q Hz power district, a larger amount of surplus liquid refrigerant flows into the main section 7 than during 60H2 operation, but
The surplus flows into the auxiliary part 8 through the communication pipe 12.

However, since the oil return hole 15 is located above the communication position 14, the liquid refrigerant that returns to the compressor 1 is only from the oil return hole 6, which is the same as when operating at 60 Hz, and there is no possibility of adversely affecting the compressor 1. do not have.

In the above embodiment, the main part 7 and the auxiliary part 8 are separate bodies, but they may be formed integrally, separated by a vertical partition plate (not shown), and a communicating hole is provided in the partition plate. .

The present invention is configured as described above, and when operating at 50 Hz,
The evaporator can be used effectively during both 60 Hz operation and a high refrigerating capacity can be achieved. At the same time, a large amount of liquid refrigerant does not return to the compressor during any operation, so there is no damage to the compressor. big.

[Brief explanation of drawings]

Fig. 1 is a refrigerant circuit diagram of the first embodiment of the present invention, and Fig. 2A. The mouth is an enlarged schematic view of the main part of the same embodiment, showing different operating states. Moreover, FIG. 3 is an enlarged schematic diagram of the main part of the conventional example. DESCRIPTION OF SYMBOLS 1... Compressor, 2... Condenser, 3... Capillary tube, 4... Evaporator, 5... Gas-liquid separator, 8
...Auxiliary part.

Claims (1)

[Scope of utility model registration request] In a refrigeration system in which a compressor, a condenser, a capillary tube, an evaporator, and a gas-liquid separator are sequentially connected in an annular manner, the resistance value of the capillary tube is determined as follows: At the same time, the gas-liquid separator is connected to the main part where the return liquid refrigerant is constantly stored during 60Hz operation under standard load conditions, and is connected to the main part so that the 60Hz of return liquid refrigerant during 50Hz operation
The main part is formed with an auxiliary part in which a surplus amount larger than that during operation is stored, and the main part is provided with an oil return hole, and the auxiliary part is provided with an oil return hole above the above-mentioned communicating position. refrigeration equipment.