JP2020139683A5 - - Google Patents

Description

In order to achieve the above object, according to the invention of claim 1, the oil return device for returning oil to the compressor of the refrigeration cycle device is
Oil flow paths (110, 112, 113, 115, XV1, XV2, 234c, 234d, 241, 242, 243) through which oil flows from the oil storage chambers (101a, 205) toward the sliding portion of the compressor. With the flow path forming portions (103a, 105a, 111, 234a, 234b, 240, X2) to be formed,
A valve component (X1) provided in the flow path forming portion and adjusting the flow rate of oil flowing through the oil flow path based on the rotation speed of the compressor is provided.

Claims (10)

An oil return device that returns oil to the compressor of a refrigeration cycle device.
Oil flow paths (110, 112, 113, 115, XV1, XV2, 234c, 234d, 241 and 242, 243) through which oil flows from the oil storage chambers (101a, 205) toward the sliding portion of the compressor. (103a, 105a, 111, 234a, 234b, 240, X2) and
A valve component (X1) provided in the flow path forming portion and adjusting the flow rate of oil flowing through the oil flow path based on the rotation speed of the compressor is provided.
The valve parts
Bases (X11, X121, X13) in which an oil chamber (X19) through which oil flows, a first oil hole (X16) communicating with the oil chamber, and a second oil hole (X17) communicating with the oil chamber are formed. When,
Drive units (X123, X124, X125) that displace when their temperature changes,
Amplifying units (X126, X127) that amplify the displacement due to changes in the temperature of the driving unit, and
A movable portion (X128) that switches communication and cutoff between the first oil hole and the second oil hole via the oil chamber by transmitting the displacement amplified by the amplification portion and moving in the oil chamber. ) And,
When the drive unit is displaced due to a change in temperature, the drive unit biases the amplification unit at the urging position (XP2), so that the amplification unit is displaced with the hinge (XP0) as a fulcrum and the above. The amplification unit urges the movable portion at the connection position (XP3) between the amplification unit and the movable portion.
An oil return device in which the distance from the hinge to the connection position is longer than the distance from the hinge to the urging position. The oil flow path includes a first flow path (115) having a fixed flow path cross-sectional area and a second flow path (XV2, XV1) for flowing oil by bypassing the first flow path.
The valve component is connected in the middle of the second flow path, and based on the rotation speed of the compressor, the movable portion communicates with or shuts off the first oil hole and the second oil hole. The oil return device according to claim 1, wherein the flow rate of oil flowing through the oil flow path is adjusted by switching to open and close the second flow path. The valve component not only switches communication and blocking between the first oil hole and the second oil hole by the movable portion, but also has the first movement by the movable portion based on the rotation speed of the compressor. The oil return device according to claim 1, wherein the flow rate of oil flowing through the oil flow path is adjusted by adjusting the opening degree of at least one of the oil hole and the second oil hole. The oil return device is installed between the evaporator of the refrigeration cycle device and the refrigerant suction side of the compressor, and is an accumulator that separates the refrigerant sucked by the compressor into a liquid phase refrigerant and a gas phase refrigerant. The oil return device according to any one of claims 1 to 3 , which is applied to 12). The oil return device is applied to an oil separator (15) that separates the oil contained in the refrigerant discharged from the compressor and returns the separated oil to the compressor, any one of claims 1 to 3. oil return device according to One. According to any one of claims 1 to 5 , the valve component includes a failure detection unit (X50) that outputs a signal for determining whether the valve component is operating normally or has failed. The oil return device described. The oil return device according to claim 6 , wherein the signal is a signal corresponding to the amount of distortion of the amplification unit. The drive unit generates heat when energized and generates heat.
The oil return device according to claim 6 or 7 , wherein the failure detection unit outputs the signal to a device (X55) that stops energization of the valve component when the valve component is out of order. The sixth or seventh aspect of the present invention, wherein the failure detection unit outputs the signal to a device (X55) that operates a notification device (X56) that notifies a person when the valve component is out of order. Oil return device. The oil return device according to any one of claims 1 to 9 , wherein the valve component is composed of a semiconductor chip.