Air conditioner

A technology of an air-conditioning device and a control device, which is applied in the directions of air-conditioning system, space heating and ventilation, space heating and ventilation control input, etc. Effect

Inactive Publication Date: 2009-04-22
SANDEN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the variable capacity compressor of the conventional vehicle-mounted air conditioner is configured to autonomously control the pressure on the low-pressure side of the refrigeration cycle to a predetermined value by variable control of the discharge capacity. The pressure on the high-pressure side of the refrigeration cycle is independently controlled to a specified value, and the heating operation that independently controls the temperature of the heating system in the car to a specified value cannot be realized.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] Such as figure 1 As shown, the vehicle air conditioner 1 has a first refrigerant circulation circuit (hereinafter referred to as the refrigeration circuit) 10, a second refrigerant circulation circuit (hereinafter referred to as the hot gas bypass circuit) 11, and a switching refrigeration circuit 10 and a hot gas bypass circuit 11. The first solenoid valve 12 and the second solenoid valve 13. The refrigeration circuit 10 makes the high-temperature and high-pressure gas refrigerant discharged from the discharge port of the variable capacity compressor 100 pass through the first solenoid valve 12, the condenser 14, the storage tank 15, the check valve 16, the expansion valve 17, and the evaporator 18 in sequence. , The accumulator 19 returns to the refrigerant circulation circuit of the variable capacity compressor 100 . The hot gas bypass circuit 11 is to make the high-temperature and high-pressure gas refrigerant discharged from the discharge port of the variable capa...

Embodiment 2

[0068] It can also be equipped with a protection device. When Pd deviates from the area Pd1

[0069] In order to expand the control range of the suction pressure, the resistance value of the electromagnetic coil 311 is set below 10Ω at normal temperature. Therefore, when used in the auxiliary heating mode, there is a possibility that the mutual energization may be maintained continuously for a long time, and the temperature of the solenoid 300B may rise, and the solenoid 300B may deteriorate rapidly. In order to suppress the aging of the solenoid 300B, in the auxiliary heating mode, when the specified duty cycle lasts for a specified time, it is also possible to give priority to high-voltage control, so that the duty...

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Abstract

Provided is an air conditioner capable of selecting a cooling run and a warming run using a high temperature-pressure gas in a freezing cycle, and capable of performing a cooling run, in which the discharge capacity of a variable-capacity compressor is variably controlled to control a compartment cooling temperature to a predetermined value, and a warming run, in which the discharge capacity of the variable-capacity compressor is variably controlled to control a compartment warming temperature to a predetermined value. The air conditioner capable of selecting the cooling run and the warming run using the hot high-pressure gas in the refrigerating cycle comprises a variable-capacity compressor for changing the pressure in a control chamber to control a discharge capacity variably by adjusting the opening a control valve including a pressure sensing mechanism (300A) for sensing the pressure of the lower-pressure side of the refrigerating cycle to urge a valve member, and a solenoid (300B) for urging the valve member in accordance with an input electric current, and a control device (400) for controlling the conductive state of the solenoid (300B) to adjust the opening of the control valve. The control device (400) controls the conductive state of the solenoid (300B) so that the control valve may act at a cooling time in accordance with the pressure of the lower-pressure side of the refrigerating cycle sensed by the pressure sensing mechanism (300A) and the conductivity of the solenoid (300B), and so that the control valve may act at a warming time in accordance with not the coolant pressure sensed by the pressure sensing mechanism (300A) but only the conductivity of the solenoid (300B).

Description

technical field [0001] The present invention relates to an air conditioner capable of performing heating operation using high-temperature and high-pressure gas of a refrigeration cycle. Background technique [0002] In Patent Document 1, a vehicle air conditioner is disclosed, which can perform auxiliary cooling operation. By introducing the high-temperature and high-pressure gas in the refrigeration cycle into the evaporator, and heating the air flowing in the air-conditioning duct through the evaporator, the Water heater heating capacity is assisted. The compressor of the vehicle air conditioner is controlled to be turned on and off according to the detection signal of the high-pressure refrigerant pressure sensor. [0003] Patent Document 1: JP-A-5-223357 [0004] In recent years, air conditioners installed in vehicles with variable-capacity compressors that vary the pressure of the control chamber to change its discharge capacity by adjusting the opening of a control v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/00F24F11/02F04B27/14F25B1/02F04B49/00
CPCF24F2221/54F25B2400/0403F25B49/022F25B2400/076F04B2027/1854F24F2011/0043F25B41/04F25B2400/0411F04B27/1804F25B2600/0271F04B2027/1827F24F11/008F04B2027/1859F24F2140/12F24F11/83F25B41/20F25B41/24F24F11/84F24F11/85F24F11/67F25B2700/1933F25B2700/21152
Inventor 田口幸彦
Owner SANDEN CORP
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