| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an expansion valve controlling degree of supercooling which can prevent a compressor from being seized under a light load operation. SOLUTION: A valve seat 4 is integrally constituted with a body 2 in a refrigerant path in which a refrigerant flows through a strainer 3. A valve element 5 is placed by being urged from the downstream of the refrigerant flow path to the valve seat 4 by a spring 6 to constitute a differential pressure regulating valve. A spring-receiving member 7 is fit in the end of the downstream of the body 2, and a throttle flow-ath 8 is made in the member 7. An oil-path 11 is formed in the valve element 5, and a minimum amount of the refrigerant can flow through the path 11, even the differential valve is closed under a light load. Thus oil mixed with the refrigerant can be returned to a compressor to prevent the compressor from seizure.</p> |
