CN212299551U - Heat exchanger and air conditioning system - Google Patents
Heat exchanger and air conditioning system Download PDFInfo
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- CN212299551U CN212299551U CN202021976075.0U CN202021976075U CN212299551U CN 212299551 U CN212299551 U CN 212299551U CN 202021976075 U CN202021976075 U CN 202021976075U CN 212299551 U CN212299551 U CN 212299551U
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 11
- 239000003507 refrigerant Substances 0.000 claims abstract description 86
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 230000000670 limiting effect Effects 0.000 claims description 41
- 238000010438 heat treatment Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Abstract
The application relates to the technical field of air conditioners in general, and in particular relates to a heat exchanger and an air conditioning system, wherein the heat exchanger comprises a collecting pipe, and a first heat exchange row group, a second heat exchange row group and a third heat exchange row group which are respectively communicated with the collecting pipe, the first heat exchange row group is connected with a liquid refrigerant inlet pipe, the second heat exchange row group and the third heat exchange row group are respectively connected with a gas refrigerant inlet pipe, when the heat exchanger is used for refrigerating, a gas-liquid two-phase refrigerant enters the first heat exchange row group through the liquid refrigerant inlet pipe, the refrigerant enters the collecting pipe after the heat exchange of the first heat exchange row group, and then flows out of the collecting pipe from the second heat exchange row group and the third heat exchange row group, the number of pipelines of the refrigerant entering and exiting the collecting pipe is reduced, the pressure drop of the heat exchanger is reduced, the number of branches of the collecting pipe is reduced relative to the heat exchangers connected, the cost of the heat exchanger is reduced.
Description
Technical Field
The application relates to the technical field of air conditioners in general, and particularly relates to a heat exchanger and an air conditioning system.
Background
The micro-channel heat exchanger is a novel efficient heat exchanger, has the advantages of high heat transfer efficiency, small volume, light weight, small filling amount and the like, and the traditional single-row micro-channel heat exchanger cannot be used on an air conditioner with large cooling capacity and high energy efficiency due to the limitation of a heat exchange area. In order to meet the requirement of meeting the required capacity in a smaller space, a multi-row micro-channel heat exchanger can be adopted, the heat exchange capacity of the heat exchanger can be effectively improved by the serial heat exchanger formed by serially or parallelly connecting the multi-row heat exchanger, the use in a large-cooling-capacity air conditioner can be met, but for a multi-row parallel heat exchanger with a larger size, a liquid inlet pipe needs to be provided with a plurality of branches, so that the processing and assembling process is complex, and the cost is higher.
SUMMERY OF THE UTILITY MODEL
In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
In order to solve the above technical problem, a main object of the present application is to provide a heat exchanger and an air conditioning system.
In order to realize the purpose of the utility model, the following technical scheme is adopted in the application:
a heat exchanger comprises a collecting pipe, a first heat exchange row group, a second heat exchange row group and a third heat exchange row group, wherein the first heat exchange row group, the second heat exchange row group and the third heat exchange row group are respectively communicated with the collecting pipe;
the first heat exchange row set is connected with a liquid refrigerant inlet pipe, and the second heat exchange row set and the third heat exchange row set are respectively connected with a gas refrigerant inlet pipe.
Further, in some embodiments of this disclosure, the first heat exchange bank is located between the second heat exchange bank and the third heat exchange bank.
Further, in some embodiments of this disclosure, the second heat exchange bank is located in the first heat exchange bank and the third heat exchange bank.
Further, in some embodiments of the present disclosure, the collecting pipe is provided with a first flow limiting structure for limiting a flow rate of the refrigerant flowing to the third heat exchange bank, and the first flow limiting structure is provided with a first flow passage for flowing the refrigerant.
Further, in some embodiments of the present disclosure, a second flow limiting structure for limiting a flow rate of the refrigerant flowing to the second heat exchange row group is further disposed inside the header, and the second flow limiting structure is provided with a second flow passage.
Further, in some embodiments of the present disclosure, an overflow section of the first flow channel is smaller than an overflow section of the second flow channel, so that a flow rate of the refrigerant flowing to the second heat exchange bank is greater than a flow rate of the refrigerant flowing to the third heat exchange bank.
Further, in some embodiments of this scheme, the first heat exchange group, the second heat exchange group and the third heat exchange group respectively include flat tubes arranged along the length direction of the collecting pipe.
Further, in some embodiments of the present disclosure, the collecting pipe is respectively provided with a flat pipe groove for assembling with the first heat exchange row group, the second heat exchange row group, and the third heat exchange row group.
Further, in some embodiments of the present disclosure, a plurality of tube cavities are partitioned in the length direction of the collecting pipe, and each of the tube cavities is connected to the first heat exchange row group, the second heat exchange row group, and the third heat exchange row group.
An air conditioning system is provided with the heat exchanger.
According to the technical scheme, the heat exchanger and the air conditioning system have the advantages and positive effects that:
when the heat exchanger is used for refrigerating, gas-liquid two-phase refrigerant enters the first heat exchange row group through the liquid refrigerant inlet pipe, the refrigerant enters the collecting pipe after heat exchange of the first heat exchange row group, then the refrigerant flows out of the collecting pipes from the second heat exchange row group and the third heat exchange row group, the number of pipelines for the refrigerant to enter and exit the collecting pipes is in a state of less inlet and more outlet, the pressure drop of the heat exchanger is reduced, the collecting pipes in the scheme reduce the number of branches of the collecting pipes relative to a plurality of rows of heat exchangers connected in parallel, the processing technology of the collecting pipes is simplified, the cost of the heat exchanger is reduced, when the heat exchanger heats, the refrigerant enters the collecting pipe from the second heat exchange row group and the third heat exchange row group, then flow out the collecting pipe from first heat exchange row group, the pipeline number that the refrigerant passed in and out the collecting pipe forms into the state of advancing more and going out a little, has improved the heat exchanger refrigerant under heating state and refrigeration state and has passed in and out the rationality of collecting pipe pipeline distribution, has improved heat transfer effect.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
FIG. 1 is a schematic flow diagram illustrating a heat exchanger refrigerant flow according to an exemplary embodiment.
Fig. 2 is a schematic diagram illustrating a flow of a refrigerant in a heating state of the heat exchanger of fig. 1 according to an exemplary embodiment.
Fig. 3 is a schematic diagram illustrating refrigerant cooling flow in another configuration of a heat exchanger according to an exemplary embodiment.
Fig. 4 is a schematic view of a refrigerant heating flow in another structure of a heat exchanger according to an exemplary embodiment.
Fig. 5 is a schematic diagram of a header structure of a heat exchanger according to an exemplary embodiment.
Fig. 6 is another schematic diagram of a header of a heat exchanger according to an exemplary embodiment.
Wherein the reference numerals are as follows:
100-collecting pipe; 200-a first heat exchange bank; 300-a second heat exchange bank; 400-a third heat exchange bank; 500-liquid refrigerant inlet pipe; 600-a first gaseous refrigerant inlet pipe; 700-a second gaseous refrigerant inlet pipe;
110-a first current limiting structure; 120-a second current limiting structure; 130-flat tube groove;
111-a first flow-through channel; 121-second flow-through channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The scheme provides a heat exchanger and an air conditioning system, the heat exchanger comprises a collecting pipe 100, a first heat exchange row group 200, a second heat exchange row group 300 and a third heat exchange row group 400 which are respectively communicated with the collecting pipe 100, the first heat exchange row group 200 is connected with a liquid refrigerant inlet pipe 500, the second heat exchange row group 300 and the third heat exchange row group 400 are respectively connected with a gas refrigerant inlet pipe, when the heat exchanger is used for refrigerating, a gas-liquid two-phase refrigerant enters the first heat exchange row group 200 through the liquid refrigerant inlet pipe 500, the refrigerant enters the collecting pipe 100 after the first heat exchange row group 200 exchanges heat, then flows out of the collecting pipe 100 from the second heat exchange row group 300 and the third heat exchange row group 400, the number of pipelines of the refrigerant inlet and outlet of the collecting pipe 100 forms a state with more inlet and outlet, when the heat exchanger is used for heating, the refrigerant enters the collecting pipe 100 from the second heat exchange row group 300 and the third heat exchange row group 400 and then flows out of the collecting pipe 100 from the first heat exchange group 200, the number of the pipelines of, the rationality of refrigerant business turn over pressure manifold 100 pipeline distribution under heat state and the refrigeration state is improved to the heat exchanger, has reduced the pressure drop of heat exchanger when the heat exchanger refrigerates, has improved the heat transfer effect, and this scheme heat exchanger has reduced the shut of pressure manifold 100 for the parallelly connected heat exchanger of present multirow, has simplified the processing technology of pressure manifold 100, has reduced the processing cost of heat exchanger.
Referring to fig. 1 and 2, the heat exchanger includes a collecting pipe 100, a first heat exchange bank 200, a second heat exchange bank 300, a third heat exchange bank 400, a liquid refrigerant inlet pipe 500, a first gaseous refrigerant inlet pipe 600, and a second gaseous refrigerant inlet pipe 700, wherein two ends of the first heat exchange bank 200 are respectively connected to the collecting pipe 100 and the liquid refrigerant inlet pipe 500, two ends of the second heat exchange bank 300 are respectively connected to the collecting pipe 100 and the first gaseous refrigerant inlet pipe 600, and two ends of the third heat exchange bank 400 are respectively connected to the collecting pipe 100 and the second gaseous refrigerant inlet pipe 700.
The second heat exchange row group 300 is located between the first heat exchange row group 200 and the third heat exchange row group 400, a first flow limiting structure 110 is arranged between the second heat exchange row group 300 and the third heat exchange row group 400 inside the header 100, a second flow limiting structure 120 is arranged between the first heat exchange bank 200 and the second heat exchange bank 300, the first flow limiting structure 110 is used for limiting the flow of the refrigerant flowing into the third heat exchange bank 400 in the collecting main 100, the first flow limiting structure 110 is provided with a first flow passage 111, the second flow limiting structure 120 is provided with a second flow passage 121, as shown in fig. 5 and 6, the first flow limiting structure 110 and the second flow limiting structure 120 divide the collecting main 100 into three collecting chambers, on the basis of the structures of fig. 1 and 2, a manifold corresponding to the first heat exchange row group 200 is defined as a first manifold, a manifold corresponding to the second heat exchange row group 300 is defined as a second manifold, and a manifold corresponding to the third heat exchange row group 400 is defined as a third manifold. The first manifold and the second manifold are communicated through a second circulation channel 121, the second manifold and the third manifold are communicated through a second circulation channel 121, the first heat exchange row set 200, the second heat exchange row set 300 and the third heat exchange row set 400 respectively comprise a plurality of flat pipes, the collecting pipe 100 corresponds to the first heat exchange row set 200, the second heat exchange row set 300 and the third heat exchange row set 400 and is provided with three rows of flat pipe grooves, and each row comprises a plurality of flat pipe grooves 130.
As shown in fig. 1, the heat exchanger is in a cooling state, the first heat exchange row group 200 is located on the windward side of the heat exchanger, a gas-liquid two-phase refrigerant flows from a liquid refrigerant inlet pipe 500 to the first heat exchange row group 200, then the refrigerant exchanges heat in the first heat exchange row group 200, the heat-exchanged refrigerant flows into a first manifold of a header 100, the refrigerant flows to a second manifold through a second flow channel 121, a part of the refrigerant in the second manifold flows out of the header 100 from the second heat exchange row group 300, the other part flows to a third manifold through a first flow channel 111, and then flows out from a third heat exchange row group 400, the number of pipelines of the refrigerant in and out of the header 100 is small, in this scheme, the flow cross section of the first flow channel 111 is smaller than that of the refrigerant in the second flow channel 121, so that the flow rate from the second heat exchange row group 300 is larger than that of the third heat exchange row group 400, according to the temperature and the moving direction of the heat exchange gas, the refrigerant flow distribution of the second heat exchange row set 300 and the third heat exchange row set 400 is improved, when the heat exchanger is used for refrigerating, the second heat exchange row set 300 is located on the windward side of the third heat exchange row set 400, the refrigerant distribution quantity of the second heat exchange row set 300 is larger than that of the third heat exchange row set 400, and the heat exchange capacity of the heat exchanger is improved.
As shown in fig. 2, the heat exchanger is in a heating state, the first heat exchange bank 200 is located on the windward side of the heat exchanger, the gaseous refrigerant enters the second heat exchange bank 300 from the first gaseous refrigerant inlet pipe 600, enters the third heat exchange bank 400 from the second gaseous refrigerant inlet pipe 700, the refrigerant flow rate of the second heat exchange bank 300 is greater than that of the third heat exchange bank 400, and the flow rate adjustment can be performed by a capillary tube or an electronic expansion valve under the understanding of a person skilled in the art, the refrigerant of the third heat exchange bank 400 flows into the third header chamber of the header pipe 100 and then flows to the first header chamber through the first flow channel 111 and the second flow channel 121, the refrigerant of the second heat exchange bank 300 flows into the second header chamber and then flows to the first header chamber through the second flow channel 121, the refrigerant flows out of the header pipe 100 through the first heat exchange bank 200 in the first header chamber, the number of the refrigerant inlet and outlet header pipe 100 forms a state of more inlet and less outlet, the rationality of the distribution of the refrigerant inlet and outlet collecting pipe 100 pipelines of the heat exchanger in the heating state is improved, and the heat exchange efficiency is improved.
With reference to fig. 3 and 4, in this embodiment, the first heat exchange row group 200 may be further disposed between the second heat exchange row group 300 and the third heat exchange row group 400, the first flow limiting structure 110 is disposed between the first heat exchange row group 200 and the third heat exchange row group 400 in the header 100, and the second flow limiting structure 120 is disposed between the first heat exchange row group 200 and the second heat exchange row group 300, in this structural state, when the heat exchanger is used, the second heat exchange row group 300 may be located on the windward side of the heat exchanger.
On the basis of the structures of fig. 3 and 4, a manifold corresponding to the first heat exchange row group 200 is defined as a first manifold, a manifold corresponding to the second heat exchange row group 300 is defined as a second manifold, and a manifold corresponding to the third heat exchange row group 400 is defined as a third manifold. The heat exchanger is in a refrigeration state, a gas-liquid two-phase refrigerant flows to the first heat exchange row group 200 from the liquid refrigerant inlet pipe 500, then the refrigerant exchanges heat in the first heat exchange row group 200, the refrigerant after heat exchange flows into the first collecting cavity of the collecting pipe 100, the refrigerant in the first collecting cavity is divided into two parts and flows towards opposite directions respectively, one part of the refrigerant flows to the second collecting cavity through the second circulation channel 121, the other part of the refrigerant flows to the third collecting cavity from the first circulation channel 111, and the third heat exchange row group 400 is positioned on the leeward side of the heat exchanger, so that the flow section of the first circulation channel 111 is smaller than that of the second circulation channel 121, the refrigerant flow of the second heat exchange row group 300 is larger than that of the third heat exchange row group 400, and the heat exchange efficiency of the heat exchanger is improved. As shown in fig. 4, when the heat exchanger is in a heating state, the gaseous refrigerant enters the header 100 from the second heat exchange bank 300 and the third heat exchange bank 400, and then flows out of the header 100 from the first heat exchange bank 200.
As shown in fig. 5, the first flow limiting structure 110 includes baffles disposed on two opposite sides inside the header 100, a first flow passage 111 is formed in a gap between the two baffles, the second flow limiting structure 120 is also formed by the baffles disposed on two opposite sides inside the header 100, the first flow limiting structure 110 and the second flow limiting structure 120 extend along the length direction of the header 100 and are connected to two ends of the header 100 in the length direction respectively, so as to ensure a flow limiting effect, the gap between the two baffles of the second flow limiting structure 120 is greater than the gap between the two baffles of the first flow limiting structure 110, so that the flow cross section of the first flow passage 111 is smaller than the flow cross section of the second flow passage 121, and the refrigerant flow rate of the second heat exchange bank 300 is greater than the refrigerant flow rate of the third heat exchange bank 400.
Under the understanding of those skilled in the art, in the present embodiment, the first current limiting structure 110 and the second current limiting structure 120 may also be omitted, and also when the heat exchanger heats, the number of the pipelines of the refrigerant inlet/outlet collecting pipe 100 may form a state of more inlet and less outlet, and when the heat exchanger cools, the number of the pipelines of the refrigerant inlet/outlet collecting pipe 100 may form a state of more inlet and less outlet, so that the rationality of pipeline distribution of the refrigerant inlet/outlet collecting pipe 100 is improved, and the heat exchange efficiency is improved. Or only the first flow limiting structure 110 may be arranged to limit the flow of the refrigerant entering the third heat exchange bank 400 from the header pipe 100, and according to the use state of the heat exchanger, the refrigerant flow is reasonably distributed under the condition that the third heat exchange bank 400 is located on the leeward side of the heat exchanger, so that the heat exchange efficiency is improved.
As shown in fig. 6, the first flow limiting structure 110 and the second flow limiting structure 120 are respectively formed by a baffle, the baffle of the first flow limiting structure 110 and the baffle of the second flow limiting structure 120 are respectively connected to a wall surface of one side of the header 100 and extend toward a wall surface of the other side opposite to the header 100, a gap formed between the baffle of the first flow limiting structure 110 and the wall surface of the other side opposite to the header 100 is a first flow passage 111, a gap formed between the baffle of the second flow limiting structure 120 and the wall surface of the other side opposite to the header 100 is a second flow passage 121, the extending direction of the baffle of the first flow limiting structure 110 and the extending direction of the baffle of the second flow limiting structure 120 are the same, the extending direction of the baffle of the first flow limiting structure 110 is defined as a height direction, the height of the baffle of the first flow limiting structure 110 is greater than the height of the baffle, so that the flow-passing end surface of the first flow passage 111 is larger than the flow-passing end surface of the second flow passage 121.
In the present embodiment, as will be understood by those skilled in the art, the first flow passage 111 may be opened to the flow hole of the first flow restriction structure 110, and the second flow passage 121 may be opened to the flow hole of the second flow restriction structure 120, where the flow hole of the first flow restriction structure 110 is smaller than the flow hole of the second flow restriction structure 120. The cross section of the circulation hole can be round, square, triangle and other shapes which can realize the circulation of the refrigerant.
The embodiment also provides an air conditioning system, and the air conditioning system is provided with the upper heat exchanger.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A heat exchanger is characterized by comprising a collecting pipe (100), and a first heat exchange row group (200), a second heat exchange row group (300) and a third heat exchange row group (400) which are respectively communicated with the collecting pipe (100);
the first heat exchange row set (200) is connected with a liquid refrigerant inlet pipe (500), and the second heat exchange row set (300) and the third heat exchange row set (400) are respectively connected with a gaseous refrigerant inlet pipe.
2. A heat exchanger according to claim 1, characterised in that the first heat exchange bank (200) is located between the second heat exchange bank (300) and the third heat exchange bank (400).
3. A heat exchanger according to claim 1, characterised in that the second heat exchange bank (300) is located in the first heat exchange bank (200) and the third heat exchange bank (400).
4. The heat exchanger according to claim 2 or 3, wherein the header (100) is provided with a first flow restriction structure (110) for restricting the flow of the refrigerant flowing to the third heat exchange bank (400), and the first flow restriction structure (110) is provided with a first flow passage (111) for the refrigerant to flow through.
5. The heat exchanger according to claim 4, wherein a second flow limiting structure (120) for limiting the flow of the refrigerant flowing to the second heat exchange row group (300) is further disposed inside the header pipe (100), and the second flow limiting structure (120) is provided with a second flow passage (121).
6. The heat exchanger according to claim 5, characterized in that the flow cross section of the first flow channel (111) is smaller than the flow cross section of the second flow channel (121) so that the flow rate of the refrigerant flowing to the second heat exchange bank (300) is greater than the flow rate of the refrigerant flowing to the third heat exchange bank (400).
7. The heat exchanger according to claim 1, wherein the first heat exchange row group (200), the second heat exchange row group (300) and the third heat exchange row group (400) respectively comprise flat tubes arranged along the length direction of the collecting main (100).
8. The heat exchanger according to claim 1, wherein the header (100) is provided with flat tube slots (130) for assembling with the first heat exchange row set (200), the second heat exchange row set (300) and the third heat exchange row set (400), respectively.
9. The heat exchanger according to claim 1, wherein a plurality of tube cavities are partitioned in the length direction of the collecting main (100), and each tube cavity is connected with the first heat exchange row group (200), the second heat exchange row group (300) and the third heat exchange row group (400) respectively.
10. An air conditioning system, characterized in that a heat exchanger according to any one of claims 1-9 is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021976075.0U CN212299551U (en) | 2020-09-10 | 2020-09-10 | Heat exchanger and air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021976075.0U CN212299551U (en) | 2020-09-10 | 2020-09-10 | Heat exchanger and air conditioning system |
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| Publication Number | Publication Date |
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| CN212299551U true CN212299551U (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021976075.0U Active CN212299551U (en) | 2020-09-10 | 2020-09-10 | Heat exchanger and air conditioning system |
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- 2020-09-10 CN CN202021976075.0U patent/CN212299551U/en active Active
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