Heat exchanger, indoor unit for air-conditioner, and refrigeration device

A heat exchanger comprising:

• a pipe made of aluminum, the pipe being configured to carry a flow of refrigerant therein;
• a thermistor configured to detect a temperature of the refrigerant;
• and
• an attaching portion with Which the thermistor is attached to the pipe,
• the pipe including a sacrificial layer provided on a part of a surface of the pipe, the sacrificial layer being lower in potential than the aluminum of the pipe, the part of the surface of the pipe where the sacrificial layer is provided being smaller than an entirety of the surface of the pipe,
• the attaching portion being higher in potential than the sacrificial layer,
• at least one part of the attaching portion being attached to the surface of the pipe where the sacrificial layer is not provided, the at least one part of the attaching portion overlapping the surface of the pipe where the sacrificial layer is not provided,
• the thermistor being made of aluminum, and
• the attaching portion including a thermistor attaching tube made of a material equal in potential to the aluminum of the thermistor.

A heat exchanger comprising:

• a pipe made of aluminum, the pipe being configured to carry a flow of refrigerant therein;
• a thermistor configured to detect a temperature of the refrigerant;
• an attaching portion with which the thermistor is attached to the pipe,
• a heat transfer tube to which the pipe is connected;
• and
• a plurality of fins attached to the heat transfer tube,
• the pipe including a sacrificial layer provided on a part of a surface of the pipe, the sacrificial layer being lower in potential than the aluminum of the pipe, the part of the surface of the pipe where the sacrificial layer is provided being smaller than an entirety of the surface of the pipe,
• the attaching portion being higher in potential than the sacrificial layer,
• at least one part of the attaching portion being attached to the surface of the pipe where the sacrificial layer is not provided, the at least one part of the attaching portion overlapping the surface of the pipe where the sacrificial layer is not provided
• the heat transfer tube including a portion
• that extends in a first direction and
• to which each of the plurality of fins is attached, each of the plurality of fins
• extending in a second direction intersecting the first direction and
• being arranged along the first direction at spacings, and
• the pipe being located outside both ends of the plurality of fins along the first direction.

A heat exchanger comprising:

• a pipe made of aluminum, the pipe being configured to carry a flow of refrigerant therein;
• a thermistor configured to detect a temperature of the refrigerant;
• and
• an attaching portion with which the thermistor is attached to the pipe,
• the pipe including a sacrificial layer provided on a part of a surface of the pipe, the sacrificial layer being lower in potential than the aluminum of the pipe, the part of the surface of the pipe where the sacrificial layer is provided not extending around an entire circumference the pipe,
• the attaching portion being higher in potential than the sacrificial layer,
• at least one part of the attaching being attached to the surface of the pipe where the sacrificial layer is not provided,
• the attaching portion including a brazed portion that is higher in potential than the sacrificial layer, and
• the thermistor being attached to the pipe with the brazed portion.