Abstract: Head support devices are described herein. The devices include a headband portion having a first end, a second end opposed to the first end, an inner surface and a outer surface, each of the inner surface and the outer surface extending between the first end and the second end, the inner surface being configured to rest against at least a portion of a user's head; a first loop coupled to the first end of the headband portion; and a second loop coupled to the second end of the headband portion. The first loop and the second loop are each configured to releasably couple to at least a portion of a seat. Methods of supporting a head against a seat are also described herein.

Abstract: A toilet bowl liner is provided that is adapted to be placed along the interior of a toilet bowl and along the base thereof. The liner has a trapezoidal shape and includes a pleated sidewall to allow the liner to expand and contract for different toilet bowl sizes. In use, the sidewalls of the liner abut the walls of the toilet bowl as the base of the liner extends across the lower opening of the toilet bowl. The liner acts as a barrier between the toilet bowel and waste water, whereby the liner can then be flushed along with the contents of the bowl. The liner is therefore flushable and biodegradable, making it suitable for use in septic systems and sewer systems. Overall, the device provides a temporary barrier to reduce accumulation of waste and deposits on the toilet bowl walls, thereby extending the period between necessary cleanings.

Abstract: A vapour compression refrigeration system includes a compressor (1) arranged to re-circulate refrigerant through a condenser (2), an expansion device (4) and an evaporator (5). To achieve rapid thermodynamically efficient defrosting of the evaporator, hot refrigerant from the condenser is stored in a defrost receiver (6) before passing through the expansion device (4). In a defrost phase, a valve arrangement (7-10) forms a closed defrost circuit connecting the evaporator (5) to the defrost receiver (6) via defrost valve (10) to allow hot fluid to pass from the defrost receiver to the evaporator and liquid refrigerant in the evaporator flows to the defrost receiver (6) via drain valve (9). In a pre-defrost phase, the valve arrangement closes the fluid input to the evaporator (5) and the compressor operates to partially evacuate the evaporator before the evaporator is connected to the defrost receiver, so that flash flooding of the evaporator with hot vapour occurs.