Thermal expansion valve having diversion function

Abstract

The present invention relates to a thermal expansion valve with the function of guiding flow. It is characterized by that in the end portion of valve port faced with outlet a flow-guiding channel is set, after having been passed through valve port and flow-guiding element the refrigerant is expanded, in the flow-guiding channel the refrigerant is flowed through curved expansion portion (streamlined portion) firstly so as to make working medium flow field be stable and uniform, then the refrigerant is passed through isometric hole portion, mixed and flow-guided to outlet so as to make the working medium in the outlet of expansion valve be stable and uniform. In particular, when the outlet of expansion valve is connected with distributor element, the distributor can be used for uniformly distributing expanded refrigerant medium, so that it can reduce vibration and noise, and can raise control performance of valve.

Description

【Technical field】 [0001] The invention relates to a thermal expansion valve structure for throttling and expanding a fluid medium, in particular to a thermal expansion valve with a diversion function. 【Background technique】 [0002] A thermostatic expansion valve, which controls the flow of fluid through the valve in response to a heat-induced fluid pressure signal, is particularly useful in refrigeration or air conditioning systems for controlling the flow of refrigerant into an evaporator. refer to figure 1 , the high-temperature and high-pressure gaseous refrigerant compressed in the compressor Y flows into the condenser L, is cooled into a high-pressure liquid refrigerant, enters the expansion valve P for throttling and pressure reduction, and then enters the evaporator Z through the outlet of the expansion valve to absorb heat and evaporate Then it is sucked into the compressor to complete a cycle. [0003] Known thermal expansion valve (see Figure 4 ) includes a va...

AI Technical Summary

Problems solved by technology

In the above-mentioned known expansion valve, the refrigerant flows through the valve port and then throttles and expands and flows to the outlet, resulting in chaotic flow of the fluid medium at the outlet of the expansion valve and uneven distribution of the flow field, which in turn causes vibration, noise, flashing gas and other defects of the expansion valve. The possibility of the phenomenon increases, especially when the expansion valve or the system has a distributor element, the uneven flow field causes the distributor to distribute the working medium unevenly, which is not conducive to the operation of the entire air conditioning system

In addition, the adjustment spring G3 is set on the passage between the high-pressure port G11 and the low-pressure port G12 of the valve body. When the cold medium flows through the valve port G13, it is hindered by the spring G3 and the flow resistance increases, which is prone to vibration and noise; To ensure that the spring can be effectively supported on the valve core, an adjustment component (such as an adjustment nut) must be provided at the lower end, which makes the structure of the expansion valve complex

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