Air conditioner

A technology for air conditioners and compressors, applied in high-efficiency regulation technology, compressors, refrigerators, etc., can solve problems such as refrigerant liquefaction retention and oil retention, and achieve the effect of preventing oil shortage and improving comfort

Pending Publication Date: 2020-12-08
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in Japanese Patent Application Laid-Open No. 2009-92337, when the heating operation is started, the liquefaction of the refrigerant stagnates in the indoor heat exchanger, and oil also stagnates in the indoor heat exchanger. lack of oil

Method used

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Experimental program
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Effect test

no. 1 approach

[0040] Hereinafter, the first embodiment of the present invention will be described in detail with reference to the accompanying drawings.figure 1 It is a schematic configuration diagram of the air conditioner 10 according to the first embodiment, and shows a refrigeration cycle applied to the air conditioner 10 .

[0041] The air conditioner 10 is composed of an indoor unit (indoor unit) 100 and an outdoor unit (outdoor unit) 110 . The air conditioner 10 includes an indoor heat exchanger 101 on the indoor unit 100 side, and a compressor 111 , outdoor heat exchanger 112 , four-way valve 113 , and expansion valve 114 on the outdoor unit 110 side on the path of the refrigeration cycle in the air conditioner 10 . In addition, the indoor unit 100 is equipped with an indoor fan 102 for sending the air heat-exchanged by the indoor heat exchanger 101 into the room, and the outdoor unit 110 is equipped with an outdoor fan 115 for sending the air into the room. Outdoor heat exchanger 1...

no. 2 approach 〕

[0065] Figure 6 It is a flowchart showing start-up control at the start of operation of the air conditioner 10 according to the second embodiment. In addition, in the activation control of the second embodiment, the same steps as those of the activation control of the first embodiment are assigned the same step numbers, and detailed description thereof will be omitted.

[0066] When the air conditioner 10 starts driving, in the startup control of the second embodiment, it is first determined whether or not the compressor 111 is in the sleep state (S1). The judgment here serves as figure 2 of the S1 step in the start-up control, but can also be used as Figure 4 The S1’ step in the start control can also be used with Figure 5 The startup control of the same method uses two steps of S1 and S1'. This is also the same as step S16 described later.

[0067] When the compressor 111 is not in the sleep state ("No" in S1), the activation operation of the air conditioner 10 incl...

no. 3 approach 〕

[0076] In the first and second embodiments described above, the sleep state of the compressor 111 was determined based on the outdoor heat exchanger temperature and the discharge temperature, but such determination requires a temperature sensor. In recent years, an air conditioner in which the number of temperature sensors used has been reduced as much as possible has been developed, and it is considered effective if such an air conditioner can determine a sleep state without using a temperature sensor.

[0077] Figure 8 It is a flowchart showing start-up control at the start of operation of the air conditioner 10 according to the third embodiment. In addition, in the start-up control of the third embodiment, the same step numbers as those of the start-up control of the first and second embodiments are given the same step numbers, and detailed description thereof will be omitted.

[0078] When the air conditioner 10 starts driving, in the startup control of the second embodi...

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PUM

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Abstract

An air conditioner according to the present invention determines whether a compressor is in a sleep state at the start of a heating operation, increases an indoor fan to a target rotational speed at afirst rate of change (R1) if it is determined that the compressor is not in the sleep state, and starts the indoor fan to the target rotational speed at a second rate of change (R2) if it is determined that the compressor is in the sleep state, wherein the second rate of change (R2) is slower than the first rate of change (R1).

Description

technical field [0001] The present invention relates to an air conditioner. Background technique [0002] An air conditioner utilizing a refrigeration cycle (heat pump cycle) operates a compressor to circulate refrigerant in the cycle. The inside of the compressor is filled with lubricating oil for good operation of the working parts. [0003] During operation of the compressor, part of the oil dissolves in the refrigerant and flows out of the compressor together with the refrigerant. The oil flowing out to the outside of the compressor returns to the compressor again after being circulated, but the time before the oil returns is not short. Therefore, if the amount of oil dissolved in the refrigerant and flowing out of the compressor is large, there may be an oil shortage in the compressor. [0004] The amount of oil dissolved in the refrigerant depends largely on the temperature, the lower the temperature, the more oil dissolved in the refrigerant. That is, if the tempe...

Claims

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Application Information

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IPC IPC(8): F24F11/58F24F11/64F24F11/74F24F11/77F24F11/86F25B13/00F25B31/00F25B49/02
CPCF24F11/77F24F11/86F24F11/64F24F11/74F24F11/58F25B31/004F25B49/022F25B13/00Y02B30/70
Inventor 上野圆
Owner SHARP KK
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