摘要:
A cooling apparatus includes: a refrigerant circuit in which a compressor (21), a condenser (22), an expansion valve (23) and an evaporator (25) are circularly connected sequentially, via a pipe, and a refrigerant circulates; and a heater (26) provided to the refrigerant circuit, in which the evaporator (25) is thermally connected to an exothermic element.
摘要:
A refrigeration cycle apparatus includes refrigerant circuits 11 and 12 each configured to circulate a refrigerant of the same composition. The refrigerant circuit 11 is provided with a radiator 31 configured to condense the refrigerant to transfer heat to external fluid, and the refrigerant circuit 12 is provided with a radiator 32 configured to transfer heat to the external fluid while allowing the refrigerant to be maintained in a supercritical state. The radiator 31 is arranged upstream of the radiator 32 in a direction of a flow of the external fluid. A capacity of a refrigerant flow channel of the radiator 32 is smaller than a capacity of a refrigerant flow channel of the radiator 31.
摘要:
A heat exchanger according to the present invention includes a plurality of thin-plate members 1 spaced apart from one another, fluid flowing through the space, a flow channel formed in each of the plurality of thin-plate members 1, a medium flowing through the flow channel, the medium exchanging heat with the fluid, and a pair of headers each connecting ends of a corresponding one of two sides of the plurality of thin-plate members. The plurality of thin-plate members 1 satisfy a relationship of 3 ≤Fp/Ft ≤ 21, where Fp denotes a pitch of the plurality of thin-plate members 1 adjacent to one another, and Ft denotes a thickness of each of the plurality of thin-plate members 1.
摘要:
A heat exchanger is configured such that flat tubes 101 in at least two levels bent or connected to each other at one end in an axial direction of the flat tubes and the flat tubes 101 in at least two columns connected to each other are included in refrigerant passages through which refrigerant flows, and a flow direction of gas is counter to flow of refrigerant through the refrigerant passages in a column direction while the heat exchanger serves as a condenser.
摘要:
Provided is a heat exchanger (1), including: a parallel-flow-type heat exchange unit (3) including a plurality of heat exchange pipes (11, 13) each extending in an up-and-down direction, the parallel-flow-type heat exchange unit including at least a front row portion (7) and a back row portion (9), the front row portion and the back row portion each including the plurality of heat exchange pipes each extending in the up-and-down direction; and a plate fin-and-tube-type heat exchange unit (5) including a plurality of plate fins (25) each extending in the up-and-down direction, the plate fin-and-tube-type heat exchange unit being arranged in front of a lower portion of a front surface of the parallel-flow-type heat exchange unit. An outlet end of the plate fin-and-tube-type heat exchange unit and an inlet end of the parallel-flow-type heat exchange unit are connected to each other by a pipe.
摘要:
Provided is a heat exchanger (1) capable of enhancing long-term reliability of the device through prevention of leakage of a fluid while being excellent in heat exchange efficiency, simple in structure, and manufacturable at low cost. The heat exchanger (1) includes a plurality of heat transfer plates (5), a plurality of inner fins (9), and a plurality of leakage preventing plates (7). Each of the leakage preventing plates has formed therein passage holes through which the fluid is caused to flow. An inner fin of a first channel and an inner fin of a second channel are provided so that the thermal resistivities of two fluids are kept equal to each other.
摘要:
A header 10a that has a configuration in which the header 10a is connected to one end of each of a plurality of flattened pipes 20 of a heat exchanger 1 that flows a refrigerant in parallel to the plurality of flattened pipes 20 disposed in parallel and an interior of the header 10a is divided by one or more division plates 11 in a parallel direction in which the plurality of heat-transfer pipes 20 are disposed in parallel, the header 10a being mounted so as to stand in an up-down direction, and a distributor 40 configured to distribute the refrigerant to each chamber within the header 10a divided by the division plates 11, are provided.
摘要:
An air-conditioning apparatus includes a body casing of an indoor unit formed in a substantially rectangular parallelepiped shape. The body casing is formed with a body inlet port on a body bottom, and a body outlet port is formed in each body side. The body casing houses a centrifugal fan, a fan motor rotatably driving the centrifugal fan, and an indoor heat exchanger disposed so as to surround an outer periphery of the centrifugal fan in planar view. In each of the body outlet port, a joint is protrudingly provided with a body-side duct connecting portion that connects a duct thereto. Further, outlet ports are formed. The air-conditioning apparatus includes a plurality of outlet units each protrudingly provided with an outlet-side duct connecting portion that connects the duct thereto. Furthermore, at least one of the joints is formed with a plurality of the body-side duct connecting portions.
摘要:
To obtain an air-conditioner apparatus that can achieve energy-saving without making refrigerant circulate up to an indoor unit and whose construction work is easy. A refrigeration cycle is configured by connecting a compressor 10, a four-way valve 11, a heat source side heat exchanger 12, expansion valves 16a to 16e, and intermediate heat exchangers 15a and 15b by piping. A heat medium circulation circuit is configured by connecting intermediate heat exchangers 15a and 15b, pumps 21a and 21b, and use side heat exchangers 26a to 26d by piping. The outdoor unit 1 that is installed in a space such as outdoors of the building 9 and accommodates the compressor 10, the four-way valve 11, and the heat source side heat exchanger 12, and the relay unit 3 that is installed in a non-subject space 8 which is different from an indoor space 7 and is on a installation floor separated by two or more floors and accommodates the expansion valves 16a to 16e, the pump 21, and intermediate heat exchangers 15a and 15b are connected by two pipelines. The relay unit 3 and an indoor unit 2 that accommodates use side heat exchangers 26a to 26d and is installed at a position where an indoor space 7 can be air-conditioned are connected by two pipelines from outside of the wall which is a partition between inside and outside of the room.
摘要:
Disclosed is a non-azeotropic refrigerant mixture containing tetrafluoropropane as a high-boiling refrigerant and a refrigeration cycle apparatus in which a non-azeotropic refrigerant mixture containing tetrafluoropropane as a high-boiling refrigerant circulates through a refrigeration cycle so as to avoid occurrence of negative pressure in a low-pressure circuit. The non-azeotropic refrigerant mixture is characterized in that a mixing ratio of a high-boiling refrigerant and a low-boiling refrigerant is determined so that a saturated vapor line where pressure is 0.00 MPa is not higher than - 45°C in a low-pressure circuit formed between the decompressor to the compressor.