Heat pump adapter system

A heat pump system comprising:

• a compressor (COMP);
• a refrigerant-load heat exchanger (COND, EVP2′);
• a heating mode refrigerant flow splitter(S);
• a refrigerant-to-refrigerant heat exchanger (HX);
• a first expansion valve (TEV1);
• a first refrigerant-air heat exchanger (EVP1, SUBC0′);
• a second expansion valve (TEV2);
• a second refrigerant-air heat exchanger (EVP2, COND0′);
• a first air flow conduit (C1);
• and
• a second air flow conduit (C2);
• wherein the heat pump system is configured or configurable for operation in a heating mode of operation for absorbing heat with the first refrigerant-air heat exchanger (EVP1) and the second refrigerant-air heat exchanger (EVP2) and for emitting heat from the refrigerant-load heat exchanger with a heating mode refrigerant flow path comprising:
• the compressor has a first inlet coupled to receive a heating mode first refrigerant stream and a second inlet coupled to receive a heating mode second refrigerant stream;
• the refrigerant-load heat exchanger is coupled to receive a heating mode common refrigerant flow from the compressor;
• the heating mode refrigerant flow splitter for splitting the heating mode common refrigerant flow from the compressor into the heating mode first refrigerant stream and the heating mode second refrigerant stream;
• and
• the refrigerant-to-refrigerant heat exchanger coupled for transferring heat between the heating mode first refrigerant stream and the heating mode second refrigerant stream;
• wherein the heating mode first refrigerant stream comprises:
• the first expansion valve coupled to receive the heating mode first refrigerant stream from the heating mode refrigerant flow splitter;
• the first refrigerant-air heat exchanger coupled to receive the heating mode first refrigerant stream from the first expansion valve;
• and
• the refrigerant-to-refrigerant heat exchanger coupling the heating mode first refrigerant stream from the first refrigerant-air heat exchanger to the compressor,
• wherein the heating mode second refrigerant stream comprises:
• the refrigerant-to-refrigerant heat exchanger coupled to receive the heating mode second refrigerant stream from the heating mode refrigerant flow splitter to the second expansion valve;
• the second expansion valve coupled to receive the heating mode second refrigerant stream from the refrigerant-to-refrigerant heat exchanger;
• and
• the second refrigerant-air heat exchanger being coupled to communicate with the heating mode second refrigerant stream from the second expansion valve to the compressor,
• wherein the first refrigerant-air heat exchanger is in the first air flow conduit with a first air inlet for receiving a first air flow, and the second refrigerant-air heat exchanger is in the second air flow conduit coupled to receive the first air flow.