Patents by Inventor Hisaaki Takaoka
Hisaaki Takaoka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 10480846Abstract: A failure determiner is provided to perform a failure diagnosis to successively evaluate functions of the refrigerant circuit and components forming the refrigerant circuit for a plurality of evaluation items. If the failure diagnosis is interrupted, the failure determiner has a restarting function to restart the failure diagnosis from an intermediate point of the failure diagnosis.Type: GrantFiled: November 27, 2015Date of Patent: November 19, 2019Assignee: Daikin Industries, Ltd.Inventors: Yuusuke Fujimoto, Naoki Nakatani, Hisaaki Takaoka, Norio Iga
-
Patent number: 10012424Abstract: The refrigeration apparatus includes a controller. The controller performs normal operation control for controlling drive of the exterior fan and the compressor in order to bring the interior temperature to a target temperature, dehumidification control in which the interior humidity is adjusted to a predetermined target range of the high-humidity region, and power-saving control which is implemented by the control of drive of the exterior fan and the compressor such that a change in the interior temperature is kept within a temperature range based on the target temperature. The controller switches from the dehumidification control to the power-saving control in the case where the interior humidity has become a lower limit value of the target range of the high-humidity region or less.Type: GrantFiled: June 6, 2012Date of Patent: July 3, 2018Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Kiichirou Satou, Hisaaki Takaoka
-
Patent number: 9829242Abstract: A refrigeration device executes a chilling operation for cooling an interior so that the temperature of the interior reaches a set temperature that is set within a predetermined temperature range. The refrigeration device has an operation control unit that, in the chilling operation, switches between pull-down control and capacity control for cooling the interior with a cooling capacity lower than that of the pull-down control. The operation control unit performs the pull-down control until the temperature of air blown toward the interior reaches at least the set temperature.Type: GrantFiled: December 27, 2013Date of Patent: November 28, 2017Assignee: Daikin Industries, Ltd.Inventors: Kiichirou Satou, Hisaaki Takaoka, Yuusuke Fujimoto, Hideaki Kuriyama, Norio Iga
-
Publication number: 20170328625Abstract: A failure determiner is provided to perform a failure diagnosis to successively evaluate functions of the refrigerant circuit and components forming the refrigerant circuit for a plurality of evaluation items. If the failure diagnosis is interrupted, the failure determiner has a restarting function to restart the failure diagnosis from an intermediate point of the failure diagnosis.Type: ApplicationFiled: November 27, 2015Publication date: November 16, 2017Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Yuusuke FUJIMOTO, Naoki NAKATANI, Hisaaki TAKAOKA, Norio IGA
-
Patent number: 9683772Abstract: A refrigeration apparatus controller calculates a refrigeration load of a refrigeration apparatus, and a load signal (S) containing load information indicating a magnitude of the refrigeration load is output from a communication device to an engine controller. The engine controller controls a speed of rotation of a generator engine based on the load signal (S).Type: GrantFiled: September 16, 2010Date of Patent: June 20, 2017Assignee: Daikin Industries, Ltd.Inventors: Makoto Ikemiya, Kazuma Yokohara, Hisaaki Takaoka, Masaaki Takegami
-
Patent number: 9358917Abstract: A refrigeration system for trailer includes an engine, a generator driven by the engine to generate electric power, an inverter substrate, a temperature sensor that senses a temperature of the inverter circuit, and a heat carrying mechanism that heats the inverter substrate with waste heat of the engine when a sensed temperature by the temperature sensor is an operational temperature or lower.Type: GrantFiled: June 7, 2010Date of Patent: June 7, 2016Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Makoto Ikemiya, Hisaaki Takaoka
-
Publication number: 20150330703Abstract: A refrigeration device executes a chilling operation for cooling an interior so that the temperature of the interior reaches a set temperature that is set within a predetermined temperature range. The refrigeration device has an operation control unit that, in the chilling operation, switches between pull-down control and capacity control for cooling the interior with a cooling capacity lower than that of the pull-down control. The operation control unit performs the pull-down control until the temperature of air blown toward the interior reaches at least the set temperature.Type: ApplicationFiled: December 27, 2013Publication date: November 19, 2015Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Kiichirou SATOU, Hisaaki TAKAOKA, Yuusuke FUJIMOTO, Hideaki KURIYAMA, Norio IGA
-
Patent number: 9134058Abstract: A refrigerant circuit is configured, which includes an electric compressor, a condenser, an expansion mechanism, an evaporator, a hot gas introduction path connecting the electric compressor and the evaporator together, and a switching valve for controlling a flow of refrigerant in the hot gas introduction path. In addition, a fan is provided. In a defrosting cycle for introducing refrigerant into the evaporator through the hot gas introduction path to defrost the evaporator, if the pressure of the condenser is equal to or lower than a predetermined threshold, the fan forms an air flow from a radiator to the condenser.Type: GrantFiled: June 3, 2010Date of Patent: September 15, 2015Assignee: DAIKEN INDUSTRIES, LTD.Inventors: Makoto Ikemiya, Hisaaki Takaoka, Shigeto Tanaka
-
Publication number: 20140373559Abstract: A method for detecting whether a different refrigerant has been charged into a refrigeration apparatus including a refrigerant circuit includes: a charging step of charging a refrigerant into the refrigerant circuit; a characteristics determination step of determining whether saturation temperature characteristics of the refrigerant charged in the charging step are identical to saturation temperature characteristics of a previously determined normal refrigerant, the saturation temperature characteristics of the refrigerant being derived from a pressure and a temperature of the refrigerant; and an alerting step of, when, in the characteristics determination step, a determination is made that the saturation temperature characteristics of the charged refrigerant are different from those of the normal refrigerant, issuing an alarm indicating that the charged refrigerant is different from the normal refrigerant.Type: ApplicationFiled: December 25, 2012Publication date: December 25, 2014Inventors: Makoto Ikemiya, Hisaaki Takaoka, Kazuhide Mizutani, Akitoshi Ueno
-
Publication number: 20140096553Abstract: The refrigeration apparatus includes a controller. The controller performs normal operation control for controlling drive of the exterior fan and the compressor in order to bring the interior temperature to a target temperature, dehumidification control in which the interior humidity is adjusted to a predetermined target range of the high-humidity region, and power-saving control which is implemented by the control of drive of the exterior fan and the compressor such that a change in the interior temperature is kept within a temperature range based on the target temperature. The controller switches from the dehumidification control to the power-saving control in the case where the interior humidity has become a lower limit value of the target range of the high-humidity region or less.Type: ApplicationFiled: June 6, 2012Publication date: April 10, 2014Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Kiichirou Satou, Hisaaki Takaoka
-
Patent number: 8250872Abstract: A refrigerating driving control section controls the driving of the refrigerating apparatus. A control constant storage section stores data in which information indicating the object to be refrigerated by the refrigerating apparatus and control constants that the refrigerating driving control section adopts for the object are associated together. An operation of operation section specifies the object. From the control constant storage section, the refrigerating driving control section reads the control constants corresponding to the object specified by the operation section, and the driving of the refrigerating apparatus is controlled on the basis of the read control constants.Type: GrantFiled: December 18, 2007Date of Patent: August 28, 2012Assignee: Daikin Industries, Ltd.Inventors: Hisaaki Takaoka, Susumu Matsui, Kiichirou Satou, Shuuhei Yamaguchi
-
Publication number: 20120167605Abstract: A refrigeration apparatus controller calculates a refrigeration load of a refrigeration apparatus, and a load signal (S) containing load information indicating a magnitude of the refrigeration load is output from a communication device to an engine controller. The engine controller controls a speed of rotation of a generator engine based on the load signal (S).Type: ApplicationFiled: September 16, 2010Publication date: July 5, 2012Inventors: Makoto Ikemiya, Kazuma Yokohara, Hisaaki Takaoka, Masaaki Takegami
-
Publication number: 20120085117Abstract: A refrigerant circuit is configured, which includes an electric compressor, a condenser, an expansion mechanism, an evaporator, a hot gas introduction path connecting the electric compressor and the evaporator together, and a switching valve for controlling a flow of refrigerant in the hot gas introduction path. In addition, a fan is provided. In a defrosting cycle for introducing refrigerant into the evaporator through the hot gas introduction path to defrost the evaporator, if the pressure of the condenser is equal to or lower than a predetermined threshold, the fan forms an air flow from a radiator to the condenser.Type: ApplicationFiled: June 3, 2010Publication date: April 12, 2012Inventors: Makoto Ikemiya, Hisaaki Takaoka, Shigeto Tanaka
-
Publication number: 20120079843Abstract: A refrigeration system for trailer includes an engine, a generator driven by the engine to generate electric power, an inverter substrate, a temperature sensor that senses a temperature of the inverter circuit, and a heat carrying mechanism that heats the inverter substrate with waste heat of the engine when a sensed temperature by the temperature sensor is an operational temperature or lower.Type: ApplicationFiled: June 7, 2010Publication date: April 5, 2012Inventors: Makoto Ikemiya, Hisaaki Takaoka
-
Publication number: 20100070081Abstract: A refrigerating driving control section controls the driving of the refrigerating apparatus. A control constant storage section stores data in which information indicating the object to be refrigerated by the refrigerating apparatus and control constants that the refrigerating driving control section adopts for the object are associated together. An operation of operation section specifies the object. From the control constant storage section, the refrigerating driving control section reads the control constants corresponding to the object specified by the operation section, and the driving of the refrigerating apparatus is controlled on the basis of the read control constants.Type: ApplicationFiled: December 18, 2007Publication date: March 18, 2010Inventors: Hisaaki Takaoka, Susumu Matsui, Kiichirou Satou, Shuuhei Yamaguchi
-
Publication number: 20100005819Abstract: A refrigeration apparatus (10) includes: a refrigerant circuit (20) provided with a variable-opening expansion valve (13); and a valve control means (33) for controlling the opening of the expansion valve (13) by outputting to the expansion valve (13) an opening command value equal to or larger than a lower limit command value. During operation of a refrigeration cycle and in a lower-limit-controlled state in which the opening command value is equal to the lower limit command value, the valve control means (33) performs a first determination operation of determining whether the refrigerant flow through the expansion valve (13) is in an excessively large amount state or not based on a condition of refrigerant between the expansion valve (13) and the suction side of a compressor (11), and corrects the lower limit command value to a smaller value if the determination result in the first determination operation is that the refrigerant flow through the expansion valve (13) is in an excessively large amount state.Type: ApplicationFiled: November 12, 2008Publication date: January 14, 2010Inventors: Noriyasu Kawakatsu, Hisaaki Takaoka, Hideaki Kuriyama, Shigeto Tanaka
-
Publication number: 20100000244Abstract: A refrigeration apparatus (10) includes: a valve control means (33) configured to control the opening of an expansion valve (13); and opening degree detection means (32, 34) configured to perform, after a pump-down operation in which a compressor (11) is driven with the expansion valve (13) closed, an opening degree detection operation of detecting an opening degree that is an opening command value for use in changing the expansion valve (13) from a closed state to an open state, by determining whether the expansion valve (13) is open based on a change in state of low-pressure refrigerant between the expansion valve (13) and the suction side of the compressor (11), while gradually increasing the opening command value output to the expansion valve (13) with the compressor (11) deactivated. The valve control means (33) controls the expansion valve (13) using the opening degree detected in the opening degree detection operation.Type: ApplicationFiled: November 12, 2008Publication date: January 7, 2010Inventors: Noriyasu Kawakatsu, Hisaaki Takaoka, Hideaki Kuriyama, Shigeto Tanaka
-
Patent number: 6119471Abstract: Cooling operation is performed so as to keep a freezer at a selected temperature. Moreover, if the cooling operation enters a phase where the freezer temperature is higher than the selected temperature by a predetermined deviation or more, not only the deviation temperature but also an accumulated time obtained by accumulating the time periods during which the cooling operation is performed at the deviation temperature or higher are stored. In addition, when an instruction signal to indicate an accumulation is input, the stored accumulated time and deviation temperature are read out and indicated on a segment indicating section (7S).Type: GrantFiled: March 26, 1998Date of Patent: September 19, 2000Assignee: Daikin Industries, Ltd.Inventors: Shigeto Tanaka, Akira Horikawa, Kenji Tanimoto, Hisaaki Takaoka