JPS593345Y2 - Refrigeration equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a refrigeration system suitable for use in a multi-room cooling system.

Generally, in a multi-room cooling system in which multiple sets of capillary tubes and series branch circuits of indoor heat exchangers are connected in parallel to a series main circuit of a compressor and an outdoor heat exchanger, the piping length from the branch point of each branch circuit to the capillary tube is If the refrigerant is different, the flow resistance will be different, resulting in uneven flow of refrigerant where more refrigerant flows to the branch circuit with lower flow resistance, and each indoor heat exchanger will not be able to perform a sufficient heat exchange action. It was hot.

The present invention was developed to solve this problem, and one embodiment thereof will be described below with reference to the drawings.

In the figure, 1 is a refrigerant compressor, 2 is an air-cooled outdoor heat exchanger, and both are connected in series to form a main circuit A.

B1. B2 is a branch circuit branched from the main circuit A and connected in parallel with each other, each having the same flow resistance as a capillary tube 30,
3□ and indoor heat exchangers 4□ and 42 for indoor air cooling are connected in series.

Furthermore, each branch circuit B1. B2 is equipped with a refrigerant drift prevention mechanism that is a feature of the present invention.

That is, 51 and 52 are each branch circuit B1. A refrigerant adjustment container installed near the branch point O (preferably as close to the branch point O as possible) on the capillary tubes 3□ and 32 of B2,
Each container 5□, 5□ has a first outflow pipe 6□, 62 that opens at the inner bottom and has a thin tube, and the container 5□, 5□ is located in the middle of the circle, which is higher than the first outflow pipe 6□, 6□. A second tube opening into the
Outflow pipes 7□ and 7□ are connected.

In addition, the part surrounded by a dashed line X indicates the outdoor unit,
One-dot chain line Y1. The part surrounded by Y2 indicates the indoor unit.

Therefore, in the above embodiment, the refrigerant discharged from the compressor 1 is liquefied in the outdoor heat exchanger 2 and divided at the branch point 0, but the containers 5□ and 5° are near the branch point O, and the containers 5□ and 5° are near the branch point O. , 5
Since there is no difference in piping resistance up to point 2 and the flow resistance is negligible, approximately the same amount of liquid refrigerant flows into the containers 50 and 5□, and the refrigerant is stored up to the H6 position.

However, in the above embodiment, assuming that the piping length on the branch circuit B2 side is short and the flow resistance from the branch point O to the capillary tube 32 is smaller than that on the other branch circuit B1, the container 5
There is a lot of refrigerant flowing out from 2, and the liquid level drops to near the H1 position.

For this reason, the refrigerant in a mixed state of liquid and gas flows out from the second outflow pipe 7□, and the resistance of the second outflow pipe 7□ increases.
As a result of the decrease in the amount of refrigerant flowing out from the container 5□, drifting of the refrigerant toward the indoor heat exchanger 4□ is prevented.

On the other hand, the other branch circuit B has a larger flow resistance than the one branch circuit B2, so the liquid level in the container 5□ rises to the H2 position, and the liquid refrigerant flows through both the outlet pipes 7□ and 7°, and the relative Since the flow resistance on the branch circuit B1 side decreases, the amount of refrigerant flowing into the indoor heat exchanger 4□ increases.

As mentioned above, the present invention is a system in which a plurality of series branch circuits of capillary tubes and indoor heat exchangers are connected in parallel to a series main circuit of a compressor and an outdoor heat exchanger, and outdoor heat is generated on the capillary tube side of each branch circuit. A refrigerant adjustment container is provided near the branch point on the exchanger side, and a first outflow pipe opens at the bottom of the refrigerant adjustment container and a second outflow pipe opens at a higher position than the first outflow pipe in the refrigerant adjustment container. Since it is connected to each refrigerant adjustment vessel, it is practical, such as preventing uneven flow of the refrigerant even if the piping lengths from the branch point of each branch circuit to the capillary tube are different, and each indoor heat exchanger can achieve a sufficient cooling effect. The effect is large.

[Brief explanation of the drawing]

The drawing is a refrigerant circuit diagram of an embodiment of the present invention. 1...Compressor, 2...Outdoor heat exchanger,
3□, 32... Capillary, 4□, 42...
・Indoor heat exchanger, 5□, 5□... Refrigerant adjustment container, 6□, 6□... First outflow pipe, 7□, 72...
...Second outflow pipe, A...Main circuit, B...
B2...Branch circuit.

Claims (1)

[Scope of utility model registration request] A plurality of series branch circuits of capillary tubes and indoor heat exchangers are connected in parallel to a series main circuit of a compressor and an outdoor heat exchanger, and a refrigerant regulating container is provided on the capillary inlet side of each branch circuit, A first outflow pipe opened at the bottom of the refrigerant adjustment container and a second outflow pipe opened at a higher position than the first outflow pipe inside the refrigerant adjustment container are connected to the outlet side of each refrigerant adjustment container. refrigeration equipment.