ENGINE DRIVEN HEAT PUMP

• US 20150184913A1
• Filed: 12/05/2014
• Published: 07/02/2015
• Est. Priority Date: 12/27/2013
• Status: Active Grant

• Current Assignee: Yanmar Power Technology Co., Ltd.
• Original Assignee: Yanmar Company Limited (Yanmar Holdings Co., Ltd.)
• Inventors: Hashimoto, Kyoko, Amakawa, Shohei, Horibe, Masaya
• Granted Patent: US 9,360,244 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F25B 2327/00 Refrigeration system using an engine for driving a compressor
• CPC Class Codes: F25B 2500/06 Damage
• CPC Class Codes: F25B 27/00 Machines, plants or systems, using particular sources of energy F25B30/06 takes precedence
• CPC Class Codes: F25B 2700/21154 of an inverter
• CPC Class Codes: F25B 31/02 of motor-compressor units
• CPC Class Codes: F25B 49/005 of safety devices F25B49/02 and F25B49/04 take precedence
• CPC Class Codes: F25B 49/025 Motor control arrangements

Abstract

An engine driven heat pump includes a temperature switch that opens and closes in accordance with the peripheral temperature of an inverter and a control device that includes a signal reception unit, and a temperature open contact point that opens at a predetermined temperature or higher is provided in the temperature switch, and an abnormal-time open contact point that opens when abnormality occurs in a battery charging circuit is provided in the battery charging circuit, and a signal generation contact point that generates a state signal indicating a state of the inverter is provided in the inverter, and the temperature open contact of point the temperature switch, the abnormal-time open contact point of the battery charging circuit, and the signal generation contact point of the inverter are connected in series with respect to the signal reception unit of the control device.

Claims

1. An engine driven heat pump, comprising:

an engine;

a compressor configured to be driven by the engine;

a refrigerant circuit configured to flow a refrigerant sucked and discharged by the compressor;

a generator configured to be driven by the engine;

an engine actuation battery configured to actuate the engine;

a battery charging circuit configured to charge the engine actuation battery;

an inverter configured to convert output power from the generator into a predetermined voltage and a predetermined frequency;

a temperature switch configured to open and close in accordance with a peripheral temperature of the inverter; and

a control device configured to include a signal reception unit,

wherein a temperature open contact point configured to be opened at a predetermined temperature or higher is provided in the temperature switch, and

wherein an abnormal-time open contact point configured to be opened when abnormality occurs in the battery charging circuit is provided in the battery charging circuit, and

wherein a signal generation contact point configured to generate a state signal indicating a state of the inverter is provided in the inverter, and

wherein the temperature open contact point of the temperature switch, the abnormal-time open contact point of the battery charging circuit, and the signal generation contact point of the inverter are connected in series with respect to the signal reception unit of the control device.

2. The engine driven heat pump according to claim 1,

wherein the inverter generates a pulse signal having a predetermined cycle at a normal time as the state signal and generates a pulse signal having a predetermined cycle, which is different from the pulse signal at the normal time, corresponding to an abnormal state at an abnormal time as the state signal.