Parker-hannifin Corporation

Roy J Nungesser

Cary Haramoto

Gary A Nearpass

Eugene A Dianetti

Juliette Myles

Daniel R Rice

Rafael Rodriguez

An expansion-distribution assembly () for the heat-absorbing component in a heatpump system. The assembly () comprises an envelope () forming an expansion chamber () and a distribution chamber (). A shuttle () within the distribution chamber () is movable between a first position in response to fluid flowing in the forward direction and a second position in response to fluid flowing in the reverse direction. The shuttle () restricts flow when fluid is flowing in the first direction but is less restrictive when fluid is flowing in the second direction.

Fluid expansion-distribution assembly

A bracket for a refrigeration valve includes an elongated flat plate bent in half with the two halves of the plate lying in parallel, adjacent relation. The inner bracket half includes an opening closely receiving the inlet fitting of the valve, and a predetermined internal geometry closely receiving the external profile of a fixed nut on the fitting. The outer bracket half also includes an opening configured to closely receive the fitting, and a dimension such that it butts up against an outer side surface of the nut. The outer bracket half is mechanically fixed to the fitting, such as by riveting, brazing or other means. Fasteners are received through corresponding apertures in the bracket halves to attach the bracket to a support surface. The cooperating geometries of the inner bracket half and the nut prevent the bracket from rotating with respect to the fitting during assembly.

Expansion valve with mounting bracket

Thermostatic expansion valve for a vehicle air-conditioning system including a housing and a power element supported by the housing. The power element includes a diaphragm, and a pressure pad disposed against the diaphragm. The pressure pad may be formed in one piece from copper, a copper alloy, or another material, which material may also be a blend, composite, mixture, or other combination, having a thermal conductivity of at least about 800 BTU-in/hr-ft-&#xb0; F. (115 W/m-K), and preferably 1200 BTU-in/hr-ft-&#xb0; F. (170 W/m-K), and more preferably at least about 2000 BTU-in/hr-ft-&#xb0; F. (280 W/m-K), and a density of at least about 0.3 lb/in(8 g/cm), and is connected via a stem to a valve element in the housing to control the refrigerant flow between the condensor and evaporator. The use of such material in the pressure pad reduces the susceptibility of the valve to external temperature changes and reduces the hunting of the valve.

Refrigeration expansion valve with thermal mass power element

An expansion/check valve assembly is provided that includes a reverse flow rate adjustment device that allows for adjustment of the flow rate of a fluid flowing reversely through an open check valve port. The adjustment device includes a flow rate control member within the valve body and an adjustment member accessible outside of the valve body. The flow rate control member is operably coupled to the adjustment member and the adjustment member preferably includes a visual indicator viewable outside of the valve body to indicate the position of the flow rate control member. When installed in a refrigeration system at the inlet of the evaporator, the reverse flow rate adjustment device can be adjusted to control defrost conditions.

Growing community of inventors

Oviedo, FL, United States of America

Roy J Nungesser