Throttling instrument for steam compression type refrigerating apparatus

Abstract

The invention provides a throttling instrument for a steam compression type refrigerating apparatus. The throttling instrument is provided with a loop through which a medium can pass. The loop is provided with a first entering and exiting opening and a second entering and exiting opening. A first valve and a second valve are arranged between the first entering and exiting opening and the second entering and exiting opening. A pipeline between the first entering and exiting opening and the first valve is provided with a first pressure measuring device. A second pressure measuring device is arranged between the second entering and exiting opening and the second valve. The first valve and the second valve are respectively provided with throttling holes. The first pipeline and a second pipeline are provided with check valves with opposite directions. The throttling device is provided with a measuring device. The throttling device can obtain a throttling work point when an air conditioner is at an optimum work state, and can find a capillary aperture and a capillary length, or a throttling pipe nipple and a throttling hole aperture, which have corresponding specifications, according to the pressure difference before and after throttling and a throttling area which is calculated on the basis of the position of a valve plug. The throttling device has short experiment process and high work efficiency. The two sets of instruments in the loop are connected by the check valves in series and then can undergo respective adjustment and measurement in two opposite directions without mutual interference.

Description

technical field [0001] The invention relates to a throttling instrument for vapor compression refrigeration equipment, which is mainly used to find the best working point of an air conditioner under a certain working condition, and to find a matching capillary tube or short throttle tube. Background technique [0002] In small vapor compression refrigeration systems, such as refrigerators, freezers, and household air conditioners, throttling mechanisms such as capillary tubes, short throttle tubes, and orifices are generally used. The matching capillary diameter and length or the diameter of the short throttle tube and the throttle hole can only be found after several experimental adjustments. The experimental process is long and the work efficiency is low. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a throttling instrument for vapor compression refrigeration equipment to help the vapor compression refrigerat...

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Problems solved by technology

[0002] In small vapor compression refrigeration systems, such as refrigerators, freezers, and household air conditioners, throttling mechanisms such as capillary tubes, short throttle tubes, and orifices are generally used. The matching capillary diameter and length or the diameter of the short throttle tube and the orifice can only be found after several experimental adjustments. The experimental process is long and the work efficiency is low.

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