CN212253234U - Microchannel heat exchanger, air conditioner and heat pump system - Google Patents

Abstract

The utility model provides a microchannel heat exchanger, air conditioner, heat pump system, microchannel heat exchanger, including the liquid pipe, be equipped with the injection baffle that has the jet orifice in the lumen of liquid pipe will the lumen is separated for the first chamber that is connected with flat pipe and the second chamber that is connected with business turn over liquid pipe, be equipped with a plurality of sub-chamber baffles in the second chamber, it is a plurality of sub-chamber baffle is in the injection baffle with in order will between the liquid pipe wall the second chamber is separated for a plurality of minute liquid sub-chambers, and a plurality of minute liquid sub-chambers have respectively and correspond with it the business turn over liquid pipe. According to the utility model discloses a microchannel heat exchanger, air conditioner, heat pump system separate the second cavity for a plurality of minute liquid sub-cavities to make the refrigerant can be separated and spray the flat pipe that the atomizing got into corresponding via spraying the baffle after being in a plurality of sub-cavitys again, the refrigerant distribution is more even, heat exchanger performance is better.

Description

Microchannel heat exchanger, air conditioner and heat pump system

Technical Field

The utility model belongs to the technical field of air conditioning, concretely relates to microchannel heat exchanger, air conditioner, heat pump system.

Background

When the microchannel heat exchanger is used as an evaporator, an inlet is generally in a gas-liquid two-phase state, most of collecting pipes of the traditional microchannel heat exchanger have no flow dividing measures, and the gas-liquid two-phase layering phenomenon is obvious after the micro-channel heat exchanger enters the collecting pipes, so that the refrigerant entering the flat pipes is unevenly distributed, and the heat exchange performance of the heat exchanger is poor. In order to overcome the defects, in the prior art, a corresponding partition plate with a spray hole is arranged in the collecting pipe to atomize the refrigerant entering the collecting pipe, but the refrigerant only enters one way, so that the phenomenon of gas-liquid two-phase separation of the refrigerant in a cavity of the collecting pipe is still obvious, the refrigerant finally entering the microchannel flat pipe is still not uniformly distributed, and the heat exchange performance of the heat exchanger still needs to be improved.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model is to provide a microchannel heat exchanger, air conditioner, heat pump system separates the second cavity for a plurality of minute liquid sub-cavities to make the refrigerant can be separated and spray the flat pipe that the atomizing got into corresponding via spraying the baffle after being in a plurality of sub-intracavity again, the refrigerant distribution is more even, heat exchanger performance is better.

In order to solve the problem, the utility model provides a microchannel heat exchanger, including the liquid pipe, be equipped with the injection baffle that has the jet orifice in the lumen of liquid pipe will the lumen is separated for the first chamber that is connected with flat pipe and the second chamber that is connected with business turn over liquid pipe, be equipped with a plurality of sub-cavity baffles in the second chamber, it is a plurality of sub-cavity baffle is in the injection baffle with in order to incite somebody to action between the liquid pipe wall the second chamber is separated for a plurality of minute liquid cavities, and a plurality of minute liquid cavities have respectively and correspond with it the business turn over liquid pipe.

Preferably, the liquid inlet and outlet pipe comprises a straight pipe section and a bending section positioned in the liquid distribution sub-cavity, and the liquid outlet direction of the bending section is not parallel to the circulation direction of the injection hole.

Preferably, each liquid separation sub-chamber has at least two liquid inlet and outlet pipes.

Preferably, the liquid outlet directions of the bending sections respectively arranged on the two liquid inlet and outlet pipes are vertical and upward, and the straight pipe sections of the liquid inlet and outlet pipes below the two liquid inlet and outlet pipes extend into the liquid separating cavity, wherein the depth of the straight pipe sections of the liquid inlet and outlet pipes above the two liquid inlet and outlet pipes extends into the liquid separating cavity.

Preferably, the aperture of the jet hole is s, and s is more than or equal to 0.05mm and less than or equal to 1.5 mm.

Preferably, the microchannel heat exchanger further comprises a flow divider, the flow divider is provided with an inlet and a plurality of outlets, and the plurality of outlets are connected with the plurality of liquid inlet and outlet pipes in a one-to-one correspondence manner.

The utility model also provides an air conditioner, including foretell microchannel heat exchanger.

The utility model also provides a heat pump system, including foretell microchannel heat exchanger.

The utility model provides a pair of microchannel heat exchanger, air conditioner, heat pump system, it is through a plurality of the sub cavity baffle will the second cavity separates for a plurality of relatively independent branch liquid cavity to make the whole cavity among the prior art separate for the liquid cavity that a plurality of sizes are littleer, the refrigerant that advances in the drain pipe gets into and is difficult for producing the double-phase separation of gas-liquid behind each minute liquid cavity, and then the atomization effect of jet orifice is better and is gone into corresponding flat pipe down, and the refrigerant distribution is more even, heat exchanger performance is better.

Drawings

Fig. 1 is a schematic structural diagram of a microchannel heat exchanger according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a microchannel heat exchanger according to another embodiment of the present invention;

fig. 3 is a schematic structural diagram of a microchannel heat exchanger according to yet another embodiment of the present invention;

fig. 4 is a schematic structural diagram of a microchannel heat exchanger according to yet another embodiment of the present invention;

FIG. 5 is a perspective view of the fluid tube of FIG. 1;

fig. 6 is a schematic structural diagram of a heat pump system according to an embodiment of the present invention.

The reference numerals are represented as:

1. a liquid pipe; 11. a jet spacer; 111. an injection hole; 12. a first chamber; 13. a second chamber; 14. a sub-cavity partition plate; 15. a liquid inlet and outlet pipe; 151. a liquid inlet and outlet; 16. flat tube mounting notches; 2. an air tube; 21. an air inlet pipe and an air outlet pipe; 3. flat tubes; 4. a flow divider; 41. an inlet; 42. an outlet; 100. a throttling element; 101. a heat exchanger; 102. a compressor; 103. and a four-way valve.

Detailed Description

Referring to fig. 1 to 6 in combination, according to the embodiment of the utility model discloses a microchannel heat exchanger is provided, including liquid pipe 1, trachea 2, liquid pipe 1 with trachea 2 forms the refrigerant through a plurality of flat pipe 3 and link up, be equipped with injection baffle 11 that has jet orifice 111 in the lumen of liquid pipe 1 will the lumen is separated for the first chamber 12 that is connected with flat pipe 3 and the second chamber 13 that is connected with business turn over liquid pipe 15, be equipped with a plurality of sub cavity baffles 14 in the second chamber 13, it is a plurality of sub cavity baffle 14 is located injection baffle 11 with between the liquid pipe 1 pipe wall with second chamber 13 is separated for a plurality of minute liquid cavities, a plurality of minute liquid cavities have with it respectively correspond go into drain pipe 15. In this technical scheme, will through a plurality of sub-cavity baffle 14 second cavity 13 separates for a plurality of relatively independent branch liquid sub-cavities to make whole cavity among the prior art separate for a plurality of less minute liquid sub-cavities of size, the refrigerant in business turn over liquid pipe 15 gets into and is difficult for producing the two-phase separation of gas-liquid behind each branch liquid sub-cavity, and then the atomization effect is better and get into corresponding flat pipe under the injection effect of jet orifice 111, and the refrigerant distribution is more even, heat exchanger performance is better.

Preferably, the liquid inlet and outlet pipe 15 includes a straight pipe section and a bent section located in the liquid separating sub-cavities, and a liquid outlet direction of the bent section is not parallel to a flow direction of the injection hole 111, so that the refrigerants in the liquid inlet and outlet pipe 15 can be fully mixed in each liquid separating sub-cavity to provide support, and cannot be quickly ejected through the injection hole 111 without mixing due to parallel.

Preferably, each liquid separator chamber has at least two liquid inlet and outlet conduits 15. At this moment, the liquid outlet directions of the bending sections of the two liquid inlet and outlet pipes 15 can adopt various combinations, for example, the liquid outlet directions of the two bending sections are the same or opposite, as shown in fig. 2 to fig. 3, the gas-liquid two-phase refrigerants in the liquid inlet and outlet pipes 15 can be mixed after entering the liquid separating cavity by corresponding to the at least two liquid inlet and outlet pipes 15 in one liquid separating cavity, and the phenomenon of 'dry evaporation' of the heat exchanger is avoided as much as possible. Preferably, as shown in fig. 4, the liquid outlet directions of the bending sections of the two liquid inlet and outlet pipes 15 are vertically upward, the straight pipe sections of the liquid inlet and outlet pipes 15 below the two liquid inlet and outlet pipes 15 extend into the liquid separating cavity, the depth of the straight pipe sections of the liquid inlet and outlet pipes 15 above the two liquid inlet and outlet pipes 15 extends into the liquid separating cavity, so that the refrigerants entering the two liquid inlet and outlet pipes 15 flow upward, the upward refrigerants can be fully mixed, the number of refrigerants on the upper portion of the liquid separating cavity is large, and the phenomenon of 'dry steaming' on the upper portion of the liquid separating cavity is avoided.

Preferably, the aperture of the injection hole 111 is s, s is not less than 0.05mm and not more than 1.5mm, so that the defects of poor atomization due to too large aperture and too large pressure drop of a small heat exchanger are avoided.

Further, the microchannel heat exchanger further comprises a flow divider 4, wherein the flow divider 4 is provided with an inlet 41 and a plurality of outlets 42, and the plurality of outlets 42 are connected with the plurality of liquid inlet and outlet pipes 15 in a one-to-one correspondence manner.

The utility model provides a give in fig. 5 the spatial structure's of liquid pipe 1 section sketch map, can see, all be equipped with two business turn over ports 151 on every minute liquid cavity wall and be used for the installation business turn over drain pipe 15 is constructed a plurality of flat tub of installation breach 16 on one side chamber wall of first chamber 12, is used for the cartridge flat pipe 3 forms reliable the connection.

According to the utility model discloses an embodiment still provides an air conditioner, including foretell microchannel heat exchanger.

As shown in fig. 6, according to an embodiment of the present invention, there is also provided a heat pump system including the microchannel heat exchanger described above. Specifically, the heat pump system further includes a throttling element 100, a heat exchanger 101, a compressor 102, and a four-way valve 103.

When the microchannel heat exchanger is used as a condenser, a b of the four-way valve 103 is communicated, c d of the four-way valve 103 is communicated, refrigerant discharged from the compressor 102 passes through the four-way valve 103, then enters the microchannel heat exchanger for condensation and heat release, then flows out through a right gas pipe 2 in N paths, enters the throttling element 100 for throttling after being converged by the flow divider 4, then enters the heat exchanger 101 for evaporation and heat absorption, and then returns to the compressor 102 through the four-way valve 103 to complete circulation; when the microchannel heat exchanger is used as an evaporator, the ac communication and the bd communication of the four-way valve 103 are realized, refrigerant discharged from the compressor 102 enters the heat exchanger 101 through the four-way valve 103 to be condensed and released heat, then enters the throttling element 100 to be throttled, then is shunted into N paths through the shunt 4 to enter the microchannel heat exchanger to be evaporated and absorbed heat, then flows out from the outlet of the air pipe 2, and finally returns to the compressor 102 through the four-way valve 103 to finish the circulation.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (8)

1. The utility model provides a microchannel heat exchanger, its characterized in that, includes liquid pipe (1), be equipped with injection baffle (11) that have jet orifice (111) in the lumen of liquid pipe (1) will the lumen is separated for first chamber (12) that are connected with flat pipe (3) and second chamber (13) that are connected with liquid inlet and outlet pipe (15), be equipped with a plurality of sub cavity baffles (14) in second chamber (13), it is a plurality of sub cavity baffle (14) are in injection baffle (11) with between liquid pipe (1) the pipe wall with second chamber (13) are separated for a plurality of minute liquid cavities, a plurality of minute liquid cavities have corresponding with it respectively liquid inlet and outlet pipe (15).

2. The microchannel heat exchanger according to claim 1, wherein the liquid inlet and outlet pipe (15) comprises a straight pipe section and a bent section in the liquid distribution sub-cavity, and the liquid outlet direction of the bent section is not parallel to the flow direction of the injection hole (111).

3. The microchannel heat exchanger of claim 2, wherein each liquid separator chamber has at least two liquid inlet and outlet tubes (15).

4. The microchannel heat exchanger according to claim 2, wherein the outlet directions of the bent sections of the two liquid inlet and outlet pipes (15) are vertically upward, and the straight section of the liquid inlet and outlet pipe (15) positioned below the two liquid inlet and outlet pipes (15) extends into the liquid separating cavity to a greater depth than the straight section of the liquid inlet and outlet pipe (15) positioned above the two liquid inlet and outlet pipes (15).

5. The microchannel heat exchanger of claim 1, wherein the diameter of the injection hole (111) is s, and s is 0.05mm ≦ 1.5 mm.

6. The microchannel heat exchanger of claim 1, further comprising a flow splitter (4), the flow splitter (4) having an inlet (41) and a plurality of outlets (42), the plurality of outlets (42) being connected to the plurality of inlet and outlet tubes (15) in a one-to-one correspondence.

7. An air conditioner comprising a microchannel heat exchanger, wherein the microchannel heat exchanger is the microchannel heat exchanger of any one of claims 1 to 6.

8. A heat pump system comprising a microchannel heat exchanger, wherein the microchannel heat exchanger is as claimed in any one of claims 1 to 6.

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