About 13 results
https://drivepatents.com/patents/1379909 · 26 Mar 2026
A low-voltage system of a transport refrigeration unit (TRU) includes a low-voltage direct current (LVDC) source; and a distribution bus coupled to the LVDC, the distribution bus is coupled to a compressor, at least one condenser, and at least one evaporat...
https://drivepatents.com/patents/1379908 · 26 Mar 2026
A heat pump system for a vehicle may include an ejector configured to increase the pressure of the introduced refrigerant and discharge the refrigerant with the increased pressure to increase the pressure and flow amount of the refrigerant, thereby being c...
https://drivepatents.com/patents/972219 · 23 Jul 2014
To provide a refrigerating and air-conditioning apparatus that is capable of, even during a heating operation under air conditions leading to formation of frost, performing a defrosting operation while simultaneously continuing the heating operation and th...
https://drivepatents.com/patents/992680 · 27 Feb 2013
A vehicle air conditioner (1A) includes a heat pump circuit (2) including a compressor (11), an outdoor heat exchanger (13), an expansion mechanism (14), a first indoor heat exchanger (15), and a second indoor heat exchanger (16). The flow direction of a r...
https://drivepatents.com/patents/996389 · 31 Oct 2012
The method involves comparing temperature of refrigerant at an inlet of a compressor (9) of an air-conditioning system (8) and a threshold value, which is greater than or equal to 35 degree Celsius. The refrigerant formed at the level of a cooling exchange...
https://drivepatents.com/patents/1072256 · 23 Nov 2005
There is provided an air conditioner, and more particularly, an apparatus and method for controlling a heating operation in a heat pump system, in which a continuous heating operation is provided. 1. The apparatus for controlling a heating operation in a h...
https://drivepatents.com/patents/1082828 · 27 Oct 2004
A secondary four-way valve (30) is arranged between an outer and inner heat exchanger (16,20) and an expansion device (18). The secondary four-way valve delivers refrigerant from one of the inner and outer heat exchangers to the inlet port (32) of expansio...
https://drivepatents.com/patents/1094022 · 13 Aug 2003
In a heat pump type air conditioner including a refrigerant circuit having a compressor, an indoor heat exchanger, a pressure-reducing device, an outdoor heat exchanger having at least one refrigerant pipe disposed therein, an engine for driving the compre...
https://drivepatents.com/patents/1094023 · 13 Aug 2003
In an air conditioner having a compressor driven by an engine and an engine cooling apparatus for circulating engine cooling medium through a circulating passage to cool the engine, the engine cooling apparatus includes a heat exchanger for performing the ...
https://drivepatents.com/patents/1097279 · 26 Mar 2003
A combined refrigerant heating and cooling system comprises a compressor (118), an outside heat exchanger (110), an inside heat exchanger (116), a refrigerant-to-engine coolant heat exchanger (124), at least one refrigerant expansion device (112) and at le...