Refrigeration cycle apparatus
First Claim
1. A refrigeration cycle apparatus, comprising:
- a main circuit configured to circulate refrigerant;
a plurality of heat source units connected in parallel to each other in the main circuit; and
a controller configured to control the plurality of heat source units,each of the plurality of heat source units including;
a compressor configured to compress and discharge refrigerant;
a plurality of parallel heat exchangers connected in parallel to each other in a flow of refrigerant and configured to operate at least as evaporators;
a check valve configured to prevent backflow of the refrigerant discharged from the compressor;
a defrosting circuit configured to branch the refrigerant discharged from the compressor on an upstream side of the check valve and supply the refrigerant to at least one or some parallel heat exchangers among the plurality of parallel heat exchangers; and
a first flow switching device configured to switch a flow passage of refrigerant passing through the plurality of parallel heat exchangers,wherein the controller is configured to switch between and performa first simultaneous heating and defrosting operation of, in at least one or some heat source units among the plurality of heat source units, supplying part of the refrigerant discharged from the compressor to the one or some parallel heat exchangers among the plurality of parallel heat exchangers through the defrosting circuit and allowing the other one or more parallel heat exchangers among the plurality of parallel heat exchangers to operate as evaporators, anda second simultaneous heating and defrosting operation of, in one or some heat source units among the plurality of heat source units, supplying the refrigerant discharged from the compressor to all the plurality of parallel heat exchangers through the defrosting circuit, and in the other one or more heat source units among the plurality of heat source units, continuing heating by allowing all the plurality of parallel heat exchangers to operate as evaporators, and operating the plurality of the heat source units so that a suction pressure of the compressor in each of the one or some heat source units among the plurality of heat source units is higher than a suction pressure of the compressor in each of the other one or more heat source units among the plurality of heat source units.
1 Assignment
0 Petitions
Accused Products
Abstract
A controller switches between and performs a first simultaneous heating and defrosting operation of supplying part of refrigerant discharged from a compressor is supplied to one or some parallel heat exchangers among a plurality of parallel heat exchangers through a defrosting circuit and allowing the other one or more parallel heat exchangers to operate as evaporators, and a second simultaneous heating and defrosting operation of, in one or some heat source units among a plurality of heat source units, supplying the refrigerant discharged from the compressor is supplied to all the plurality of parallel heat exchangers through the defrosting circuit, and in the other one or more heat source units, continuing heating by allowing all the plurality of parallel heat exchangers to operate as evaporators.
-
Citations
10 Claims
-
1. A refrigeration cycle apparatus, comprising:
-
a main circuit configured to circulate refrigerant; a plurality of heat source units connected in parallel to each other in the main circuit; and a controller configured to control the plurality of heat source units, each of the plurality of heat source units including; a compressor configured to compress and discharge refrigerant; a plurality of parallel heat exchangers connected in parallel to each other in a flow of refrigerant and configured to operate at least as evaporators; a check valve configured to prevent backflow of the refrigerant discharged from the compressor; a defrosting circuit configured to branch the refrigerant discharged from the compressor on an upstream side of the check valve and supply the refrigerant to at least one or some parallel heat exchangers among the plurality of parallel heat exchangers; and a first flow switching device configured to switch a flow passage of refrigerant passing through the plurality of parallel heat exchangers, wherein the controller is configured to switch between and perform a first simultaneous heating and defrosting operation of, in at least one or some heat source units among the plurality of heat source units, supplying part of the refrigerant discharged from the compressor to the one or some parallel heat exchangers among the plurality of parallel heat exchangers through the defrosting circuit and allowing the other one or more parallel heat exchangers among the plurality of parallel heat exchangers to operate as evaporators, and a second simultaneous heating and defrosting operation of, in one or some heat source units among the plurality of heat source units, supplying the refrigerant discharged from the compressor to all the plurality of parallel heat exchangers through the defrosting circuit, and in the other one or more heat source units among the plurality of heat source units, continuing heating by allowing all the plurality of parallel heat exchangers to operate as evaporators, and operating the plurality of the heat source units so that a suction pressure of the compressor in each of the one or some heat source units among the plurality of heat source units is higher than a suction pressure of the compressor in each of the other one or more heat source units among the plurality of heat source units. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification