1. A device comprising:
a receptacle connector comprising a pair of boss-receiving slots at opposite ends of an opening and polarization slots for receiving polarization keys; and
a plug that mates with the receptacle connector by insertion of an insert portion of the plug into the opening of the receptacle connector, wherein the insert portion comprises a pair of bosses at opposite ends and polarization keys that comprise respectively a pair of curved side surfaces, wherein the pair of curved side surfaces of a given polarization key has different curvatures for a proximal curved sides surface of the pair of curved side surfaces and distal curved side surface of the pair of curved side surfaces.
2. The device of claim 1, wherein the polarization slots are on a given edge that abuts the opening for receiving the polarization keys of the plug.
3. The device of claim 2,
wherein the given edge and an opposite edge that abuts the opening are parallel with respect to each other; and
wherein the polarization slots are on an edge of the receptacle connector that is on an opposite edge of the receptacle connector that includes the pair of boss-receiving slots.
4. The device of claim 2, wherein the polarization slots is a pair of polarization slots located on an opposite edge that abuts the opening of the receptacle connector.
5. The device of claim 2, wherein the pair of bosses are positioned at opposite ends on a common side of the insert portion.
6. The device of claim 5, wherein the pair of bosses function as stops to prevent corners of the insert portion from being inserted into the opening so as to damage contacts of the receptacle connector in the opening during mating of the plug with the receptacle connector.
7. The device of claim 5, wherein the pair of bosses are a pair of circular bosses.
8. The device of claim 5, wherein the polarization keys are positioned on an opposite side of the insert portion.
9. The device of claim 8, wherein the polarization keys are located closer to a center portion of the insert portion than the pair of bosses.
10. The device of claim 8, wherein the pair of bosses are located closer to distal ends of the insert portion than the polarization keys.
11. A device comprising:
a receptacle connector comprising a pair of boss-receiving slots at opposite ends of an opening and polarization slots for receiving polarization keys; and
a plug that mates with the receptacle connector by insertion of an insert portion of the plug into the opening of the receptacle connector, wherein the insert portion comprises a pair of bosses at opposite ends and polarization keys that comprise respectively a pair of curved side surfaces, wherein the respective pair of curved side surfaces of the polarization keys are configured to allow the polarization keys to enter corresponding polarization slots when the plug is pivoted about one of the bosses of the pair of bosses that has been inserted into a corresponding boss receiving slot of the pair of boss-receiving slots.
12. The device of claim 11, wherein the pair of bosses are configured to prevent substantial insertion of the insert portion into the opening except when at least one of the pair of bosses is aligned with a respective boss receiving slot of the pair of boss-receiving slots.
13. The device of claim 11, wherein the polarization slots are on a given edge that abuts the opening, the polarization slots being configured to receive the polarization keys of the insert portion during mating of the plug with the receptacle connector.
14. The device of claim 13, wherein the polarization keys are on an opposite side of the insert portion than the pair of bosses.
15. The device of claim 14, wherein the polarization keys have a substantially similar shape as the pair of bosses.
16. The device of claim 11,
wherein the pair of bosses are positioned at opposite ends on a common side of the insert portion;
wherein the pair of bosses function as stops to prevent corners of the insert portion from being inserted into the opening so as to damage contacts of the receptacle connector in the opening; and
wherein the pair of bosses are configured to prevent substantial insertion of the insert portion except when at least one of the pair of bosses is aligned with a respective boss receiving slot of the pair of boss-receiving slots.
17. The device of claim 16, wherein the pair of bosses are a pair of circular bosses.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An air-conditioning apparatus including a refrigeration cycle configured by connecting a load-side heat exchanger, a first expansion device, a heat-source-side heat exchanger and a compressor and by causing refrigerant to circulate through a refrigerant circuit including the load-side heat exchanger, the first expansion device, the heat-source-side heat exchanger, and the compressor,
the air-conditioning apparatus comprising a controller configured to control an opening degree of the first expansion device and an operation capacity of the compressor,
wherein the controller, during a heating operation, controls an opening degree of the first expansion device so that a degree of subcooling of the refrigerant at an outlet of the load-side heat exchanger becomes equal to a target degree of subcooling and controls an operation capacity of the compressor so that pressure of the refrigerant at an outlet of the compressor becomes equal to a target pressure, and
in a case where an operation capacity of the compressor is approximately at a maximum value of the operation capacity of the compressor and a condensing temperature of the load-side heat exchanger is lower than a target temperature, the controller controls an opening degree of the first expansion device, based on a discharge pressure of the compressor, so that pressure of the refrigerant at the outlet of the compressor becomes equal to a target pressure.
2. An air-conditioning apparatus including a refrigeration cycle configured by connecting a load-side heat exchanger, a first expansion device, a second expansion device, a heat-source-side heat exchanger, and a compressor and by causing refrigerant to circulate through a refrigerant circuit including the load-side heat exchanger, the first expansion device, the second expansion device, the heat-source-side heat exchanger, and the compressor,
wherein the compressor is a compressor that is capable of injecting refrigerant, and the air-conditioning apparatus comprises
a controller configured to control an opening degree of the first expansion device and an operation capacity of the compressor,
a bypass pipe that extends from a portion of a flow passage between the first expansion device and the second expansion device to an injection port of the compressor, and
a bypass expansion device that adjusts a flow rate of the bypass pipe, and
wherein the controller, during a heating operation, controls an opening degree of the first expansion device so that a degree of subcooling of the refrigerant at an outlet of the load-side heat exchanger becomes equal to a target degree of subcooling and controls the operation capacity of the compressor so that pressure of the refrigerant at the outlet of the compressor becomes equal to a target pressure, and
in a case where an operation capacity of the compressor is approximately at a maximum value of the operation capacity of the compressor and a condensing temperature of the load-side heat exchanger is lower than a target temperature, the controller controls an opening degree of the first expansion device, based on a discharge pressure of the compressor, so that the pressure of the refrigerant at the outlet of the compressor becomes equal to the target pressure.
3. The air-conditioning apparatus of claim 2, further comprising:
a receiver that is provided between the first expansion device and the second expansion device and that stores refrigerant,
wherein during the heating operation, in a case where a degree of suction refrigerant superheat of the compressor is lower than a target value, the controller reduces an opening degree of the second expansion device so that the degree of suction refrigerant superheat increases.
4. The air-conditioning apparatus of claim 2,
wherein during the heating operation, in a case where the operation capacity of the compressor is approximately at the maximum value of the operation capacity of the compressor and the discharge pressure of the compressor is smaller than a target value, the controller performs control for reducing an air volume of air blown to the load-side heat exchanger, instead of the control for the opening degree of the first expansion device or along with the control for the opening degree of the first expansion device, to achieve the target pressure.
5. The air-conditioning apparatus of claim 1,
wherein an upper limit value of the target pressure is determined based on an upper limit restriction temperature of a discharge temperature of the compressor or withstand pressures of pipes of the refrigerant circuit.
6. The air-conditioning apparatus of claim 1, further comprising:
an accumulator that is provided on a suction side of the compressor and that stores the refrigerant.
7. The air-conditioning apparatus of claim 2,
wherein an upper limit value of the target pressure is determined based on an upper limit restriction temperature of a discharge temperature of the compressor or withstand pressures of pipes of the refrigerant circuit.
8. The air-conditioning apparatus of claim 2, further comprising:
an accumulator that is provided on a suction side of the compressor and that stores the refrigerant.