CROSS-REFERENCE TO RELATED APPLICATIONS

This U.S. National stage application claims priority under 33 U.S.C. § 119(a) to Japanese Patent Application No. 2017-246140, filed in Japan on Dec. 22, 2017, the entire contents of which are hereby incorporated herein by reference.

BACKGROUND

Field of the Invention

The present disclosure relates to a compressor included in an air conditioner.

Background Information

JP 2008-106738 A discloses a compressor. The compressor includes a casing having an outer surface provided with a discharge temperature sensor configured to detect temperature of a discharged refrigerant.

SUMMARY

JP 2008-106738 A does not refer to a temperature sensor configured to sense temperature of a compression mechanism. Sensing the temperature of the compression mechanism leads to sensing a phenomenon such as abnormal heating at the compression mechanism.

Solution to Problem

A compressor according to a first aspect includes a compression mechanism, a casing, and a temperature detector. The compression mechanism has a rotation axis. The casing accommodates the compression mechanism. The casing includes a compression mechanism contact portion. The compression mechanism is in contact with an inner surface of the compression mechanism contact portion. The temperature detector is attached to an outer surface of the compression mechanism contact portion and is configured to sense temperature of the compression mechanism contact portion.

This configuration enables sensing a phenomenon of the compression mechanism such as abnormal heating.

A compressor according to a second aspect includes a compression mechanism, a casing, and a temperature detector. The compression mechanism has a rotation axis. The casing accommodates the compression mechanism. The casing includes a compression mechanism contact portion. The compression mechanism is in contact with an inner surface of the compression mechanism contact portion. The temperature detector is attached to an outer surface of the compression mechanism contact portion. In a side view, at least 50% of a length of the compression mechanism contact portion along the rotation axis is overlapped with the temperature detector, or, in a side view, at least 50% of a length of the temperature detector along the rotation axis is overlapped with the compression mechanism contact portion.

This configuration enables sensing a phenomenon of the compression mechanism such as abnormal heating.

A compressor according to a third aspect is the compressor according to the second aspect, in which, in a side view, at least 70% of the length of the compression mechanism contact portion along the rotation axis is overlapped with the temperature detector, or, in a side view, at least 70% of the length of the temperature detector along the rotation axis is overlapped with the compression mechanism contact portion.

This configuration achieves increase of an overlapped portion between the compression mechanism contact portion and the temperature detector. In this configuration, heat emitted from the compression mechanism is more likely to be transmitted to the temperature detector that can thus further sense abnormal heating at the compression mechanism.

A compressor according to a fourth aspect is the compressor according to the third aspect, in which, in a side view, at least 90% of the length of the compression mechanism contact portion along the rotation axis is overlapped with the temperature detector, or, in a side view, at least 90% of the length of the temperature detector along the rotation axis is overlapped with the compression mechanism contact portion.

This configuration achieves increase of an overlapped portion between the compression mechanism contact portion and the temperature detector. In this configuration, heat emitted from the compression mechanism is more likely to be transmitted to the temperature detector that can thus further sense abnormal heating at the compression mechanism.

A compressor according to a fifth aspect is the compressor according to any one of the first to fourth aspects, in which the compression mechanism includes a compression mechanism extension section. The compression mechanism extension section radially extends from a center to a peripheral edge of the compression mechanism. The casing includes a compression mechanism extension section contact portion. The compression mechanism extension section contact portion is a portion of the casing in contact with the compression mechanism extension section. The temperature detector is attached to the casing so as to cover the compression mechanism extension section contact portion in a side view.

In this configuration, the temperature detector covers the compression mechanism extension section contact portion in a side view. Heat generated at the compression mechanism is thus likely to be transmitted directly to the temperature detector through the compression mechanism extension section.

A compressor according to a sixth aspect is the compressor according to any one of the first to fifth aspects, in which the compression mechanism includes a cylinder, a piston, and a head. The piston revolves around the rotation axis. The head, the cylinder, and the piston define a compression chamber. The compression mechanism contact portion of the casing is in contact with a contact member of the compression mechanism. The contact member is the cylinder or the head.

This configuration enables accurate detection of temperature of a compression mechanism included in a rotary compressor.

A compressor according to a seventh aspect is the compressor according to the sixth aspect, in which the contact member includes a continuous portion radially occupying from an outer edge of the compression chamber to the compression mechanism contact portion. The continuous portion has no opening.

In this configuration, the compression mechanism contact portion and the outer edge of the compression chamber are connected via the continuous portion of the contact member. The continuous portion has no opening. Heat of the compression chamber is thus likely to be transmitted to the compression mechanism contact portion, enabling more accurate sensing of abnormal heating at the compression mechanism.

A compressor according to an eighth aspect is the compressor according to any one of the first to seventh aspects, in which the compression mechanism has a suction hole. A first imaginary half line starts from the rotation axis and passes a center of the suction hole in a planar view. A second imaginary half line starts from the rotation axis and passes the temperature detector in a planar view. The first imaginary half line and the second imaginary half line form an angle not less than 30 degrees and not more than 330 degrees.

This configuration secures distance between a suction pipe or a refrigerant circuit component connected to the suction pipe and the temperature detector. This inhibits defects such as decrease in detection temperature of the temperature detector by the refrigerant circuit component having low temperature.

A compressor according to a ninth aspect is the compressor according to any one of the first to eighth aspects, in which the temperature detector is configured as a thermistor.

The temperature detector in this configuration is a thermistor configured to measure temperature. The compressor can thus be controlled in accordance with measured temperature.

A compressor according to a tenth aspect is the compressor according to any one of the first to eighth aspects, in which the temperature detector is configured as a thermostat.

The temperature detector in this configuration is a thermostat configured to sense abnormal temperature. This configuration thus causes a control circuit included in the compressor to be shut down upon sensing of abnormal temperature.

