| Patent application number | Description | Published |
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| 20090025406 | Refrigerant Quantity Determining System of Air Conditioner - In a multi-type air conditioner, the adequacy of the refrigerant quantity charged in the air conditioner can be accurately determined, even when the refrigerant quantity charged on site is inconsistent, or even when a reference value of the operation state quantity, which is used for determining the adequacy of the refrigerant quantity, fluctuates depending on the pipe length of the refrigerant communication pipe, combination of utilization units, and the difference in the installation height among each unit. In an air conditioner ( | 01-29-2009 |
| 20090031739 | AIR CONDITIONER - An air conditioner performs a refrigerant quantity judging operation to judge the refrigerant quantity in a refrigerant circuit, and includes a heat source unit, utilization units, expansion mechanisms, a first refrigerant gas pipe, a second refrigerant gas pipe, a refrigerant liquid pipe, switching mechanisms, bypass circuits, bypass circuit opening/closing element, and a controller. The switching mechanism can switch between a first state and a second state. The bypass circuit opening/closing element are provided in the bypass circuits that bypass the first refrigerant gas pipe to the second refrigerant gas pipe, and open and close the bypass circuits. The controller opens the bypass circuit opening/closing element before performing the refrigerant quantity judging operation. | 02-05-2009 |
| 20090044550 | AIR CONDITIONER - An error in judgment due to the difference in the temperature of the refrigerant at an outlet of a condenser is reduced when judging the adequacy of the refrigerant quantity. An air conditioner ( | 02-19-2009 |
| 20090095000 | AIR CONDITIONER - An air conditioner includes a refrigerant circuit configured by the interconnection of a compressor, an outdoor heat exchanger, an indoor expansion valve, and an indoor heat exchanger; an operation controlling means capable of performing a refrigerant quantity judging operation to control constituent equipment such that the refrigerant circulation flow rate that is the refrigerant quantity circulating in the refrigerant circuit becomes constant; and a refrigerant quantity judging means that judges the adequacy of the refrigerant quantity in the refrigerant circuit using an operation state quantity of constituent equipment or refrigerant flowing in the refrigerant circuit during the refrigerant quantity judging operation. | 04-16-2009 |
| 20090126379 | AIR CONDITIONER - An air conditioner includes a refrigerant circuit, a refrigerant quantity calculating section, and a refrigerant quantity judging section. The refrigerant circuit is configured by the interconnection of a compressor, an outdoor heat exchanger, and an indoor heat exchanger. The refrigerant quantity calculating section uses a relational expression between the refrigerant quantity in each portion of the refrigerant circuit when the refrigerant circuit is divided into a plurality of portions and an operation state quantity of constituent equipment or refrigerant flowing in the refrigerant circuit in order to calculate the refrigerant quantity in each portion from the operation state quantity of constituent equipment or refrigerant flowing in the refrigerant circuit. The refrigerant quantity judging section uses the refrigerant quantity in each portion calculated by the refrigerant quantity calculating section in order to judge the adequacy of the refrigerant quantity in the refrigerant circuit. | 05-21-2009 |
| 20090255284 | AIR CONDITIONER - A refrigerant circuit and an operation control means are provided. A refrigerant circuit is configured by the interconnection of a heat source unit, a plurality of utilization units, and expansion mechanisms. The heat source unit has a compressor and a heat source side heat exchanger. The utilization units have utilization side heat exchangers. The operation control means is capable of performing a refrigerant quantity judging operation to control constituent equipment such that a first state value becomes a first target control value. In addition, during the refrigerant quantity judging operation, the operation control means maintains a cooling capacity of a first utilization unit among the plurality of utilization units, which air conditions a predetermined space. | 10-15-2009 |
| 20090260376 | AIR CONDITIONER - An air conditioner includes a refrigerant circuit, a refrigerant quantity calculating section, and a refrigerant quantity judging section. The refrigerant circuit includes a compressor, an outdoor heat exchanger, an indoor expansion valve, and an indoor heat exchanger interconnected together. The refrigerant quantity calculating section calculates the refrigerant quantity in the refrigerant circuit taking into account a dissolved refrigerant quantity that is the quantity of refrigerant dissolved in the refrigerating machine oil in the compressor, based on an operation state quantity of constituent equipment or refrigerant flowing in the refrigerant circuit. The refrigerant quantity judging section judges the adequacy of the refrigerant quantity in the refrigerant circuit based on the refrigerant quantity calculated by the refrigerant quantity calculating section. In addition, the refrigerant quantity calculating section calculates the dissolved refrigerant quantity based on operation state quantities that include at least the ambient temperature outside the compressor. | 10-22-2009 |
| 20100154447 | AIR CONDITIONER - An air conditioner performs a refrigerant quantity judging operation to judge the refrigerant quantity in a refrigerant circuit, and includes a heat source unit, utilization units, expansion mechanisms, a first refrigerant gas pipe, a second refrigerant gas pipe, a refrigerant liquid pipe, switching mechanisms, temperature detecting means, and a controller. The heat source unit includes a compression means and a heat source side heat exchanger. The first refrigerant gas pipe is connected to the discharge side of the compression means. The switching mechanism can switch between a first state and a second state. The temperature detecting means are mounted on the first refrigerant gas pipe, and configured to detect a refrigerant temperature on the first refrigerant gas pipe side and output a refrigerant temperature detection value. The controller corrects the refrigerant quantity judged by a refrigerant quantity judging operation based on the refrigerant temperature detection value. | 06-24-2010 |
| 20100244863 | FLUID SENSOR, REFRIGERANT LEAKAGE DETECTION DEVICE, REFRIGERATION SYSTEM, AND REFRIGERANT LEAKAGE DETECTION METHOD - It is possible to detect refrigerant leakage while pinpointing the location where refrigerant leakage is occurring in a refrigerant circuit of a refrigeration system. A fluid sensor ( | 09-30-2010 |
