Abstract: A heating, ventilation, air conditioning, and/or refrigeration (HVAC&R) system (10) includes a vapor compression system (14) having an evaporator (38), a condenser (34), and a compressor (32). The compressor (34) is configured to guide a refrigerant therethrough in a normal operating mode of the vapor compression system (14) and in a free cooling mode of the vapor compression system (14). The HVAC&R system (10) also includes a controller (40) configured to enable supply of power to a motor (50) of the compressor (34) in the normal operating mode and to suspend supply of power to the motor (50) of the compressor (34) in the free cooling mode.

Abstract: A floor cleaning device including a base assembly for movement along a surface, a handle, a nozzle, a nozzle lifting mechanism, a brush, a brush lifting mechanism, a recovery tank, and a liquid distribution system. The nozzle lifting mechanism moving the nozzle relative to the base assembly and the surface and the brush lifting mechanism moving the brush relative to the base assembly and the surface.

Abstract: A floor cleaning device including a base assembly for movement along a surface, a handle, a nozzle, a nozzle lifting mechanism, a brush, a brush lifting mechanism, a recovery tank, and a liquid distribution system. The nozzle lifting mechanism moving the nozzle relative to the base assembly and the surface and the brush lifting mechanism moving the brush relative to the base assembly and the surface.

Abstract: A floor cleaning device comprises a base portion for movement along a surface and a handle portion pivotally connected to the base. The base portion further includes a suction nozzle and a brush assembly for agitating the surface, wherein the brush assembly and the nozzle assembly are in a first position raised off of the surface for vacuuming saw the surface, and the nozzle assembly is lowered to a second position contacting the surface for collecting and picking up liquid and dirt from the surface. A method of cleaning a surface by first dry vacuuming the surface using a cleaning unit in which the nozzle assembly is raised to pick up particles and then wet vacuuming the floor with the nozzle assembly lowered to collect and pick up dirt from the floor mixed with cleaning solution distributed on the floor.

Abstract: A floor cleaning device comprises a base portion for movement along a surface and a handle portion pivotally connected to the base. The base portion further includes a suction nozzle and a brush assembly for agitating the surface, wherein the brush assembly and the nozzle assembly are in a first position raised off of the surface for vacuuming the surface, and the nozzle assembly is lowered to a second position contacting the surface for collecting and picking up liquid and dirt from the surface. A method of cleaning a surface by first dry vacuuming the surface using a cleaning unit in which the nozzle assembly is raised to pick up particles and then wet vacuuming the floor with the nozzle assembly lowered to collect and pick up dirt from the floor mixed with cleaning solution distributed on the floor.

Abstract: A cleaner for cleaning a surface comprises a floor-engaging portion for moving along the surface. A magnet and a hall effect sensor located in the cleaner handle generates a control signal. The control signal is provided to a control circuit which controls one or more operational features of the cleaner. One such operational features includes at least one pump for mixing and distributing cleaning solution to the surface. In an alternate embodiment, the control circuit controls an electric motor for propelling the cleaner over the surface.

Abstract: A cleaner for cleaning a surface comprises a floor-engaging portion for moving along the surface. A source supplies a liquid to a distributor, which distributes the liquid from the source on the surface wherein an activating device is operatively connected to the source to activate the source to supply liquid to the distributor to distribute liquid on the surface in response to a force moving the floor engaging portion in a first direction.

Abstract: A floor cleaning device comprises a base portion for movement along a surface and a handle portion pivotally connected to the base. The base portion further includes a suction nozzle and a brush assembly for agitating the surface, wherein the brush assembly and the nozzle assembly are in a first position raised off of the surface for vacuuming the surface, and the nozzle assembly is lowered to a second position contacting the surface for collecting and picking up liquid and dirt from the surface. A method of cleaning a surface by first dry vacuuming the surface using a cleaning unit in which the nozzle assembly is raised to pick up particles and then wet vacuuming the floor with the nozzle assembly lowered to collect and pick up dirt from the floor mixed with cleaning solution distributed on the floor.

Abstract: A dirt collecting system for a vacuum cleaner includes a dirt cup formed with a coarse particle separation chamber and a fine particle separation chamber separated by an apertured wall. Coarse dirt particles directed into the coarse particle separation chamber are prevented from entering the fine particle separation chamber by the apertured wall. The apertured wall is removable from the dirt cup and is cleaned upon removal by a cleaning element. A fine particle filter is located in the fine particle separation chamber for filtering fine particles. The fine particle filter is cleaned by rotating a knob located in the dirt cup lid so that the pleats of the fine particle filter is brushed past a wiper element.

Abstract: An improved floor cleaning device comprises a base portion for movement along a surface and a handle portion pivotally connected to the base. The base portion further includes a suction nozzle and a brush assembly for agitating the surface, wherein the brush assembly and the nozzle assembly are in a first position raised off of the surface for vacuuming said surface, and the nozzle assembly is lowered to a second position contacting the surface for collecting and picking up liquid and dirt from the surface. A method of cleaning a surface by first dry vacuuming the surface using a cleaning unit in which the nozzle assembly is raised to pick up particles and then wet vacuuming the floor with the nozzle assembly lowered to collect and pick up dirt from the floor mixed with cleaning solution distributed on the floor.

Abstract: A cleaner for cleaning a surface comprises a floor-engaging portion for moving along the surface. A source supplies a liquid to a distributor, which distributes the liquid from the source on the surface wherein an activating device is operatively connected to the source to activate the source to supply liquid to the distributor to distribute liquid on the surface in response to a force moving the floor engaging portion in a first direction.

Abstract: A dirt collecting system for a vacuum cleaner includes a dirt cup formed with a course particle separation chamber and a fine particle separation chamber separated by an apertured wall. An inlet opening is formed in the dirt cup and communicates with the course particle separation chamber for inputting a stream of dirt laden air into the course particle separation chamber. A clean air outlet opening is formed in the fine particle separation chamber for allowing the filtered air stream to exit the dirt cup. The apertured wall includes a pre-filter for filtering coarse particles from a stream of dirt laden and depositing the coarse particles in the course particle separation chamber. A fine particle separation filter is positioned within the fine particle separation chamber and communicates with the clean air outlet opening. The fine particle separation filter separates fine particles from the air stream and deposits the fine particles within the fine particle separation chamber.

Abstract: The invention described provides a nozzle that includes a pivoted wand to permit relative movement in a vertical plane between the wand and nozzle during manipulation by the operator. The center for the pivot for the wand is located at floor level. This permits friction generated forces that are imparted to the nozzle to be imposed so as to prevent unbalanced moments being generated tending to tip the nozzle during its movement over a floor or carpeting.

Abstract: A convertible platform and shelf apparatus for a van like vehicle having a compartment comprising a frame strut assembly connected to the inside walls of the compartment and a plurality of utility shelf assemblies that have a plurality of hinged together planar members selectively positionable in rigid coplanar relationship. The shelf assemblies are detachably connectable to the frame strut assembly to form utility areas usable as tables, beds, storage areas or for personnel back support. Retractable leg assemblies are provided for partial support when the shelf assemblies are used as tables. Also provided is a platform assembly that selectively folds into a reversable facing seat or into an elevated platform to serve as a bed or the like.