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Refrigeration cycle device

A refrigeration cycle and control device technology, used in refrigerators, refrigeration and liquefaction, irreversible cycle compressors, etc., can solve problems such as performance degradation and scroll damage, and achieve the effect of inhibiting damage and inhibiting the increase of circulation volume.

Pending Publication Date: 2022-08-02
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the oil-injected hermetic scroll compressor disclosed in Patent Document 1 is not configured to control the amount of oil injected into the compression chamber, so oil is always injected into the compression chamber.
Therefore, in a scroll compressor operated by inverter control, the higher the operating frequency becomes in the higher range, the more the amount of oil introduced into the compression chamber increases, and there is a possibility of damage to the wrap due to oil compression, and Concerns about performance degradation due to increased circulation of discharged oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0016] figure 1 It is a refrigerant circuit diagram of the refrigeration cycle apparatus which concerns on Embodiment 1. figure 2 It is a schematic longitudinal cross-sectional view showing a scroll compressor, which is a constituent element of the refrigeration cycle apparatus according to the first embodiment. The refrigeration cycle apparatus according to Embodiment 1 is used for, for example, an air conditioner, a refrigerating apparatus, a refrigerator, a freezer, a vending machine, or a hot water supply apparatus. like figure 1 As shown, the refrigeration cycle apparatus includes a refrigerant circuit 100 including a main circuit A, a refrigerant injection circuit B, and an oil injection circuit C.

[0017] like figure 1 as well as figure 2 As shown, the main circuit A includes a scroll compressor 200 having a compression chamber 30 for compressing refrigerant and an injection pipe 12 connected to the compression chamber 30, an oil separator 201, a first heat excha...

Embodiment approach 2

[0044] Next, based on image 3 A refrigeration cycle apparatus according to Embodiment 2 will be described. image 3 It is a refrigerant circuit diagram of the refrigeration cycle apparatus which concerns on Embodiment 2. However, the same reference numerals are attached to the same structures as those of the refrigeration cycle apparatus described in Embodiment 1, and the descriptions thereof are appropriately omitted.

[0045] like image 3 As shown, the refrigeration cycle apparatus according to Embodiment 2 includes a refrigerant circuit 101 including a main circuit A, a refrigerant injection circuit B, and an oil injection circuit C.

[0046] The main circuit A is configured by connecting the scroll compressor 200 , the oil separator 201 , the first heat exchanger 202 , the decompression device 203 , and the second heat exchanger 204 through piping in this order, and circulates the refrigerant. The first heat exchanger 202 in the second embodiment functions as a conden...

Embodiment approach 3

[0053] Next, based on Figure 4 A refrigeration cycle apparatus according to Embodiment 3 will be described. Figure 4It is a refrigerant circuit diagram of the refrigeration cycle apparatus which concerns on Embodiment 3. FIG. However, the same reference numerals are attached to the same structures as those of the refrigeration cycle apparatuses described in Embodiments 1 and 2, and descriptions thereof are omitted as appropriate.

[0054] The refrigerant circuit 102 of the refrigeration cycle apparatus according to the third embodiment is characterized in that, in addition to the configuration of the second embodiment, an oil return pipe for bypassing the oil separator 201 and the suction side of the scroll compressor 200 is provided. 209 structure. The oil return pipe 209 is provided with a third control valve 210 , and the third control valve 210 is controlled by the control device 300 to adjust the flow rate of oil flowing in the oil return pipe 209 . The third control...

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Abstract

The purpose of the present disclosure is to provide a refrigeration cycle device capable of controlling the amount of oil injected into a compression chamber. This refrigeration cycle device is provided with: a main circuit in which a scroll compressor, an oil separator, a first heat exchanger, a pressure reduction device, and a second heat exchanger are connected in this order by piping, and in which a refrigerant circulates; an oil injection circuit branched from the oil separator and connected to an injection pipe of the scroll compressor; and a control device that controls the operation of the refrigeration cycle device. The oil injection circuit is provided with a first control valve which is controlled by a control device to adjust the flow rate of oil flowing in the oil injection circuit.

Description

technical field [0001] The present disclosure relates to a refrigeration cycle apparatus including a refrigerant circuit having an oil injection circuit. Background technique [0002] As a refrigeration cycle apparatus, a configuration including a scroll compressor having an injection flow path for supplying oil to a compression chamber in the middle of compression is known. For example, in the oil-filled hermetic scroll compression mechanism disclosed in Patent Document 1, a part of the oil separated by an oil separator provided on the discharge side of the scroll compressor is transferred from the injection port through the oil supply delivery pipe and the injection pipe. supply to the compression chamber. Among them, the compression chamber is formed by combining the fixed wrap of the fixed scroll and the swing wrap of the swing scroll. [0003] Patent Document 1: Japanese Patent Application Laid-Open No. 5-5486 [0004] However, the oil-injected hermetic scroll compre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/00F25B1/04
CPCF25B1/00F25B1/04
Inventor 森下卓美沟畑隼平
Owner MITSUBISHI ELECTRIC CORP
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