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Refrigeration cycle device

A technology of circulation device and refrigerant, which can be used in irreversible cycle compressors, compressors with reversible cycles, refrigerators, etc., can solve the problems of inability to implement air conditioning, inefficiency, etc., and achieve improved comfort and efficient operation control. Effect

Inactive Publication Date: 2016-03-16
HITACHI JOHNSON CONTROLS AIR CONDITIONING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the operation pattern that repeatedly stops and starts during such a small-capacity operation is not only inefficient, but also makes it impossible to perform comfortable air-conditioning. Therefore, a technology that tries to control the capacity has been proposed.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] according to Figure 1 ~ Figure 4 Embodiment 1 of the refrigeration cycle apparatus of the present invention will be described.

[0039] figure 1 It is a schematic configuration diagram showing a refrigeration cycle apparatus according to Embodiment 1 of the present invention, and the present invention is applied to a room air conditioner (air conditioner).

[0040] right figure 1 The illustrated refrigeration cycle apparatus will be described together with its operation during cooling operation. The refrigerant compressed by the compressor 1 flows into the four-way valve 5 from the high-pressure side connection pipe 7 , passes through the four-way valve 5 , and flows into the outdoor connection pipe 8 . Then, the refrigerant exchanges heat with the outdoor air through the outdoor heat exchanger 2 to dissipate heat, condenses and liquefies, and depressurizes through the expansion valve 3 . The refrigerant that has been decompressed to a low temperature and low press...

Embodiment 2

[0068] Figure 5 It is a schematic configuration diagram showing a refrigerating cycle apparatus according to Embodiment 2 of the present invention. Like Embodiment 1, this refrigerating cycle apparatus is also used in an indoor air conditioner. in the Figure 5 , marked with the above figure 1 Parts with the same reference numerals represent the same or corresponding parts. In addition, in this embodiment 2, the difference from embodiment 1 is that the suction pressure sensor is removed, and instead, the outlet temperature sensor 24 is provided near the outlet of the ventilation passage of the indoor heat exchanger 4, and the outlet temperature sensor 24 is used to Check the blowout temperature.

[0069] In the case of control using a capacity adjustment mechanism for small capacity control, the PWM control signal is turned on (that is, the solenoid valve 12 is opened), thereby increasing the evaporation pressure, and when the PWM control signal is turned off (that is, the...

Embodiment 3

[0075] Figure 7 It is a schematic configuration diagram showing a refrigerating cycle apparatus according to Embodiment 3 of the present invention, and as in Embodiments 1 and 2, this refrigerating cycle apparatus is also used in a room air conditioner. in the Figure 7 , marked with the above figure 1 , Figure 5 Parts with the same reference numerals represent the same or corresponding parts. In addition, in this embodiment 3, the difference from the embodiments 1 and 2 is that the suction pressure sensor 23 of the embodiment 1 and the sensor 23 provided near the outlet of the ventilation passage of the indoor heat exchanger 4 in the embodiment 2 are removed. The temperature sensor 24 is blown out.

[0076]In the case of control using a capacity adjustment mechanism that performs small capacity control, the PWM control signal is turned on (that is, the solenoid valve 12 is opened), thereby increasing the evaporation pressure. If the PWM control signal is turned off (tha...

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Abstract

A refrigerating cycle system is provided with a compressor 1, an outdoor heat exchanger 2, an expansion valve 3 capable of controlling an opening thereof, and an indoor heat exchanger 4. The refrigerating cycle system is further provided with a bypass flow path 11 for causing a refrigerant in the middle of compression in the compressor to bypass toward a suction side of the compressor; a solenoid valve 12 for opening or closing the bypass flow path; and a controller 20 for controlling open state time of the solenoid valve, and closed state time thereof to adjust a flow rate of a refrigerant discharged from the compressor into a refrigerating cycle, thereby executing a capacity-control. The controller executes a control on the basis of a duty ratio, that is, a ratio of the open time of the solenoid valve against a duty period representing the sum of the open time of the solenoid valve, and the closed time thereof, and further, if a pressure on the suction side of the compressor when the solenoid valve is in the state is higher than a suction pressure before the solenoid valve is in the state by a allowable deviation, the controller controls the solenoid valve so as to be in the closed state, the closed time being decided on the basis of the duty period.

Description

technical field [0001] The present invention relates to a refrigeration cycle apparatus including a capacity control compressor capable of controlling capacity. In addition, the present invention is suitable for refrigerating cycle devices such as air-conditioning and hot water supply systems for new-generation houses that are highly environmentally friendly (environmentally responsive), and is particularly suitable for systems that can perform a wide range of operations and operate even in ultra-small-capacity operation modes. A scroll compressor refrigeration cycle device capable of efficient capacity control. Background technique [0002] In recent years, from the viewpoint of reducing the energy consumed by ordinary houses, that is, the energy consumed by air conditioners and the energy consumed by hot water suppliers, there has been a growing trend to reduce thermal loads by using high thermal insulation materials for building insulation materials. In addition, there i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B1/00F25B1/04
CPCF25B49/022F25B13/00F25B2313/0314F25B2313/0315F25B2600/0261F25B2600/2513F25B2600/2521F25B2700/2104F25B2700/2106
Inventor 小山昌喜小谷正直饭岛辽太
Owner HITACHI JOHNSON CONTROLS AIR CONDITIONING INC