Heat medium relay unit and air-conditioning apparatus equipped with same

A heat medium relay unit, comprising:

• a heat exchanger related to heat medium that exchanges heat between a refrigerant in a refrigerant circuit in which the refrigerant is circulated by being discharged from a compressor provided in an outdoor unit and a heat medium, which is different from the refrigerant, in a heat medium circuit in which the heat medium is circulated and sent to a plurality of indoor units with a pump;
• a plurality of heat medium flow control devices that each control a flow rate of the heat medium sent to a use side heat exchanger of the corresponding indoor unit;
• and
• a plurality of heat medium flow switching devices disposed so as to correspond to the respective indoor units, the heat medium flow switching devices communicating an inlet side passage or an outlet side passage of the heat medium of each use side heat exchanger with the heat exchanger related to heat medium, the heat medium relay unit having the plurality of heat medium flow control devices and the plurality of heat medium flow switching devices in a different housing from the outdoor unit and the indoor units, wherein
• a pipe port of each of the heat medium flow control devices is connected to a pipe port of a corresponding one of the heat medium switching devices,
• the plurality of heat medium flow control devices are provided on one side of the housing, and
• the plurality of heat medium flow switching devices are arranged on a side substantially orthogonal to the one side of the housing.