JPWO2022195659A5 - - Google Patents

Description

The windward heat exchanger 2A, which is a group of windward flat tubes, is divided into two regions, upper and lower. The windward heat exchanger 2A includes a windward main heat exchanger 11 configured in an upper region and a windward auxiliary heat exchanger 12 configured in a lower region. The upwind main heat exchanger 11 includes a plurality of first flat tubes 201 arranged at intervals. The upwind sub-heat exchanger 12 includes a plurality of second flat tubes 202 arranged at intervals. The number of first flat tubes 201 is greater than the number of second flat tubes 202. In the upwind heat exchanger 2A, the plurality of first flat tubes 201 are arranged above the plurality of second flat tubes 202.

The leeward heat exchanger 2B as a leeward flat tube group is divided into two regions, upper and lower. The leeward heat exchanger 2B includes a leeward main heat exchanger 13 configured in an upper region and a leeward secondary heat exchanger 14 configured in a lower region. The leeward main heat exchanger 13 includes a plurality of third flat tubes 301 arranged at intervals. The leeward sub-heat exchanger 14 includes a plurality of fourth flat tubes 302 arranged at intervals. The number of third flat tubes 301 is greater than the number of fourth flat tubes 302. In the downwind heat exchanger 2B , the plurality of third flat tubes 301 are arranged above the plurality of fourth flat tubes 302.

The end of each flat tube 20 in the windward heat exchanger 2A , which is a windward flat tube group, opposite to the side where the refrigerant flows in and out is the corresponding end in the leeward heat exchanger 2B , which is a leeward flat tube group. It is connected to the end of the flat tube 30 on the opposite side of the distributor 50. The flat tubes 20 of the upwind heat exchanger 2A and the flat tubes 30 of the leeward heat exchanger 2B are connected via a row connecting portion 60.

<About condenser flow>
The flow of refrigerant when the outdoor heat exchanger 2 according to the second embodiment acts as a condenser will be described below. During cooling operation of the air conditioner 100, the outdoor heat exchanger 2 acts as a condenser. The arrow shown with a broken line in FIG. 14 indicates the flow direction of the refrigerant. The refrigerant sequentially flows from the flow path G1 to the flow path G9. In the case of condenser flow, the high-temperature, high-pressure gaseous refrigerant flows into the first header pipe 15 through the flow path G1 configured by the first connecting pipe 15a of the upwind heat exchanger 2A . The refrigerant that has passed through the flow path G1 passes through 24 first connecting portions 20a extending from the first header pipe 15, and then passes through the flow path G2 configured by the flat tube 20. Thereafter, the refrigerant passes through the flow path G3 formed by the row transfer section 60.

The refrigerant that has flowed into the first space 17a passes through the fourth connection portion 30a of the leeward heat exchanger 1B, and then passes through the flow path G6 formed by the flat tube 30. Thereafter, the refrigerant passes through the flow path G7 configured by the row transfer section 60. The refrigerant that has passed through the flow path G7 flows into the inside of the second header pipe 16 through a flow path G8 configured by the flat tubes 20 of the upwind heat exchanger 2A. The refrigerant that has flowed into the second header pipe 16 is in a liquid state due to heat exchange with outdoor air when passing from the flow path G1 to the flow path G8. The refrigerant in a liquid state flows out of the outdoor heat exchanger 2 through a flow path G9 configured by the second connecting pipe 16a of the upwind heat exchanger 2A.

1, 2 outdoor heat exchanger, 1A, 2A upwind heat exchanger, 1B, 2B leeward heat exchanger, 10, 50 distributor, 11 upwind main heat exchanger, 12 upwind sub-heat exchanger, 13 leeward main Heat exchanger, 14 Downstream sub-heat exchanger, 15 First header pipe, 16 Second header pipe, 17 Third header pipe, 18 Vertical connection pipe, 19 Bend pipe, 20, 30 Flat pipe, 41 Compressor, 42 Square Valve, 44 throttle device, 45 indoor heat exchanger, 46 outdoor fan, 47 indoor fan, 48 control device, 49 extension pipe, 60 row transfer section, 71 first fin, 72 second fin, 100 air conditioner, 100A indoor machine, 100B outdoor unit, 201 first flat tube, 202 second flat tube, 301 third flat tube, 302 fourth flat tube, FR frost, W wind.

Claims (10)

A heat exchanger that exchanges heat between a refrigerant and air,
an upwind flat tube group composed of a plurality of first flat tubes and a plurality of second flat tubes arranged at intervals;
a leeward flat tube group composed of a plurality of third flat tubes and a plurality of fourth flat tubes arranged at intervals, and located on the leeward side of the windward flat tube group with respect to the air flow direction;
When the refrigerant is connected to the ends of the plurality of third flat tubes and acts as an evaporator, the refrigerant flowing from the centrally located inflow tube is distributed to the plurality of third flat tubes by branching a plurality of times. equipped with a vessel and
When acting as an evaporator, the refrigerant flows in the order of the plurality of second flat tubes, the plurality of fourth flat tubes, the plurality of third flat tubes, and the plurality of first flat tubes,
When acting as a condenser, the refrigerant flows in the order of the plurality of first flat tubes, the plurality of third flat tubes, the plurality of fourth flat tubes, and the plurality of second flat tubes ,
The distributor has a fourth protrusion projecting outward from the main body of the distributor,
A heat exchanger , wherein a flow path is formed in the fourth convex portion through which the refrigerant flows from the inflow pipe and branches . The number of the plurality of first flat tubes is greater than the number of the plurality of second flat tubes,
In the windward flat tube group, the plurality of first flat tubes are arranged above the plurality of second flat tubes,
The number of the plurality of third flat tubes is greater than the number of the plurality of fourth flat tubes,
The heat exchanger according to claim 1, wherein in the leeward flat tube group, the plurality of third flat tubes are arranged above the plurality of fourth flat tubes. In the windward flat tube group, the plurality of first flat tubes and the plurality of second flat tubes at the end opposite to the side where the refrigerant flows in and out are connected to each other in upper and lower sets. Ori,
In the leeward flat tube group, the plurality of third flat tubes and the plurality of fourth flat tubes at the end opposite to the distributor are connected to each other in upper and lower pairs,
In the windward flat tube group and the leeward flat tube group, the ends of the plurality of first flat tubes and the plurality of third flat tubes are skipped by one at the end opposite to the connected side for each set of upper and lower ends. The heat exchanger according to claim 1 or 2, wherein the plurality of second flat tubes and the plurality of fourth flat tubes are connected every other time. A first end of each flat tube in the windward flat tube group opposite to the side where the refrigerant flows in and out is a first end opposite to the distributor of the corresponding flat tube in the leeward flat tube group. The heat exchanger according to claim 1 or 2, wherein the two ends are connected. further comprising a first connecting member that connects the first end and the second end that are not coaxial with respect to the flow direction of the refrigerant,
The first connecting member includes a first convex portion protruding outward from the main body of the first connecting member corresponding to each flat tube in the windward flat tube group, and a first convex portion protruding outward from the main body portion of the first connecting member in correspondence with each flat tube in the windward flat tube group, and The heat exchanger according to claim 4, further comprising a second convex portion projecting outward from the main body portion of the first connecting member in correspondence with the pipe. The first connecting member is composed of a plurality of plate-like members,
The plurality of plate-shaped members include a first plate-shaped member in which the first convex part and the second convex part are formed, a flow path formed in the first convex part, and a flow path formed in the second convex part. 6. The heat exchanger according to claim 5, further comprising: a second plate-like member in which a step-like hole is formed to connect the second plate member with the flow path. further comprising a second connecting member connecting the first end and the second end coaxially with respect to the flow direction of the refrigerant,
The second connecting member includes a third connecting member that protrudes outward from the main body of the second connecting member corresponding to each flat tube in the windward flat tube group and each flat tube in the leeward flat tube group. The heat exchanger according to claim 4, comprising a convex portion. The heat exchanger according to any one of claims 1 to 7, wherein the distributor is comprised of a plurality of plate-like members provided with holes. a plurality of first fins joined to the plurality of first flat tubes and the plurality of second flat tubes;
further comprising a plurality of second fins joined to the plurality of third flat tubes and the plurality of fourth flat tubes,
The heat exchanger according to any one of claims 1 to 8, wherein an interval between the plurality of first fins is wider than an interval between the plurality of second fins. An air conditioner comprising the heat exchanger according to any one of claims 1 to 9.

Images