CN109539634B - Micro-channel heat exchanger and air conditioner - Google Patents
Micro-channel heat exchanger and air conditioner Download PDFInfo
- Publication number
- CN109539634B CN109539634B CN201811467282.0A CN201811467282A CN109539634B CN 109539634 B CN109539634 B CN 109539634B CN 201811467282 A CN201811467282 A CN 201811467282A CN 109539634 B CN109539634 B CN 109539634B
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- Prior art keywords
- heat exchange
- collecting pipe
- liquid collecting
- gas collecting
- heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2260/00—Heat exchangers or heat exchange elements having special size, e.g. microstructures
- F28F2260/02—Heat exchangers or heat exchange elements having special size, e.g. microstructures having microchannels
Abstract
The invention discloses a microchannel heat exchanger and an air conditioner, wherein the microchannel heat exchanger comprises a plurality of heat exchange units, each heat exchange unit comprises a liquid collecting pipe, a gas collecting pipe and a plurality of heat exchange pipes, the heat exchange pipes are communicated with the liquid collecting pipes and the gas collecting pipes, the gas collecting pipes are positioned above or below the liquid collecting pipes, one end of each liquid collecting pipe is a refrigerant inlet end, and the other end of each liquid collecting pipe is a closed end. At least two heat exchange tubes are vertically arranged, two adjacent heat exchange tubes are parallel, the length from the refrigerant inlet end of the liquid collecting tube to the closed-end heat exchange tube of the liquid collecting tube is gradually smaller or gradually increased, and fins are arranged between the two adjacent heat exchange tubes. The invention also provides an air conditioner which comprises the micro-channel heat exchanger in any one of the above items. Compared with the prior art, the invention ensures that the liquid refrigerant entering the heat exchange unit can be accumulated in the heat exchanger without vaporization and can not flow out of the heat exchanger, so that the refrigerant flowing out of the refrigerant outlet is gaseous refrigerant.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a micro-channel heat exchanger and an air conditioner.
Background
The micro-channel heat exchanger is a novel high-efficiency heat exchanger, has the advantages of high heat transfer efficiency, small volume, light weight, small filling amount and the like, and is popularized and used on a large scale on an outdoor single-cooler.
However, the existing micro-channel heat exchanger has the following problems: when the heat that the air side can take away is greater than the heat that liquid refrigerant totally vaporizes into the gaseous state refrigerant required, promptly when liquid refrigerant can not totally vaporize into the gaseous state refrigerant in the heat exchanger, the condition that has liquid refrigerant from the refrigerant export outflow takes place.
Disclosure of Invention
The invention provides a micro-channel heat exchanger and an air conditioner, aiming at solving the problem that liquid refrigerants flow out from a refrigerant outlet when the liquid refrigerants are not completely vaporized into gaseous refrigerants in the prior art.
The technical scheme adopted by the invention is as follows: the utility model provides a microchannel heat exchanger, includes a plurality of heat transfer unit, and heat transfer unit includes the collector tube that the level set up, the gas collecting tube that the slope set up and locates a plurality of heat exchange tube between collector tube and the gas collecting tube, and heat exchange tube intercommunication collector tube and gas collecting tube, gas collecting tube are located the top or the below of collector tube, and the one end of collector tube is the refrigerant entrance point, and the other end is the blind end, and the upper end of first gas collecting tube is the refrigerant exit end.
The heat exchange tube is vertically arranged.
The heat exchange tubes are vertically arranged, the number of the heat exchange tubes is at least two, the adjacent two heat exchange tubes are parallel, and the length from the refrigerant inlet end of the liquid collecting tube to the closed-end heat exchange tube of the liquid collecting tube is gradually reduced or gradually increased.
The heat exchange tubes are at least two, fins are arranged between every two adjacent heat exchange tubes and are wavy, and the heat exchange tubes are flat tubes.
The heat exchange units are respectively a first heat exchange unit and a second heat exchange unit, and the first heat exchange unit and the second heat exchange unit are arranged up and down and are not communicated with each other; the first gas collecting pipe of the first heat exchange unit is positioned below the first liquid collecting pipe of the first heat exchange unit, the refrigerant outlet end of the first gas collecting pipe is positioned at the closed end of the first liquid collecting pipe, the lower end of the first gas collecting pipe is positioned right below the refrigerant inlet end of the first liquid collecting pipe, and two ends of a first heat exchange pipe of the first heat exchange unit are respectively communicated with the first liquid collecting pipe and the first gas collecting pipe; the second gas collecting pipe of the second heat exchange unit is positioned above the second liquid collecting pipe of the second heat exchange unit, the refrigerant outlet end of the second gas collecting pipe is positioned right above the closed end of the second liquid collecting pipe, the lower end of the second gas collecting pipe is positioned at the refrigerant inlet end of the second liquid collecting pipe, and two ends of a second heat exchange pipe of the second heat exchange unit are respectively communicated with the second liquid collecting pipe and the second gas collecting pipe.
The lower end of the second gas collecting pipe is communicated with the second liquid collecting pipe, and the first gas collecting pipe and the second gas collecting pipe are arranged in parallel.
The invention also provides an air conditioner which comprises the micro-channel heat exchanger in any one of the technical schemes.
Compared with the prior art, the invention has the advantages that: the invention ensures that the liquid refrigerant entering the heat exchange unit can be accumulated in the heat exchanger without vaporization and can not flow out of the heat exchanger, so that the liquid refrigerant flowing out of the refrigerant outlet is gaseous refrigerant.
Drawings
FIG. 1 is a schematic structural view of a microchannel heat exchanger according to the present invention.
Detailed Description
The principles and construction of the present invention will be described in detail below with reference to the drawings and examples.
As shown in fig. 1, the microchannel heat exchanger provided by the invention comprises a plurality of heat exchange units, each heat exchange unit comprises a horizontally arranged liquid collecting pipe, an obliquely arranged gas collecting pipe and a plurality of heat exchange pipes arranged between the liquid collecting pipe and the gas collecting pipe, the heat exchange pipes are communicated with the liquid collecting pipe and the gas collecting pipe, the gas collecting pipe is positioned above or below the liquid collecting pipe, one end of the liquid collecting pipe is a refrigerant inlet end, the other end of the liquid collecting pipe is a closed end, and the upper end of the first gas collecting pipe is a refrigerant outlet end.
In this embodiment, the number of the heat exchange units is two, and the two heat exchange units are respectively the first heat exchange unit 10 and the second heat exchange unit 20, and the first heat exchange unit 10 and the second heat exchange unit 20 are vertically arranged and are not communicated.
The left end of the first liquid collecting pipe 1 is a refrigerant inlet end, and the right end of the first liquid collecting pipe 1 is a closed end. The first gas collecting pipe 2 of the first heat exchange unit 10 is located below the first liquid collecting pipe 1 of the first heat exchange unit 10, the refrigerant outlet end of the first gas collecting pipe 2 is located at the closed end of the first liquid collecting pipe 1, the lower end of the first gas collecting pipe 2 is located right below the refrigerant inlet end of the first liquid collecting pipe 1, and two ends of the first heat exchange pipe 5 of the first heat exchange unit 10 are respectively communicated with the first liquid collecting pipe 1 and the first gas collecting pipe 2.
The upper end of the first gas collecting pipe 2 is connected with the right end of the first liquid collecting pipe 1, and the right end of the first liquid collecting pipe 1 is not communicated with the first gas collecting pipe 2. The upper end of the first gas collecting pipe 2 is a refrigerant outlet end, the lower end of the first gas collecting pipe 2 is a closed end, and the upper end of the first gas collecting pipe 2 is an outlet at the highest position where the first heat exchange unit 10 exchanges substances with the outside.
At least two first heat exchange tubes 5 are arranged between the first liquid collecting tube 1 and the first gas collecting tube 2, and the first heat exchange tubes 5 are vertically arranged. The upper end of the first heat exchange tube 5 is communicated with the first liquid collecting tube 1, the lower end of the first heat exchange tube 5 is communicated with the first gas collecting tube 2, two adjacent first heat exchange tubes 5 are arranged in parallel, the length of the first heat exchange tube 5 is gradually reduced (or gradually increased) from the refrigerant inlet end of the first liquid collecting tube 1 to the closed end of the first liquid collecting tube 1, and liquid refrigerant flowing into the first liquid collecting tube 1 from the refrigerant inlet end of the first liquid collecting tube 1 can flow into the first heat exchange tube 5 through a through opening between the first heat exchange tube 5 and the first liquid collecting tube 1.
Be equipped with first fin 6 between two adjacent first heat exchange tubes 5, the outer wall of two adjacent first heat exchange tubes 5 is connected respectively to the left and right sides of first fin 6, and first fin 6 is wavy.
The first heat exchange tube 5 adopts a flat tube.
The first heat exchange unit 10 is provided with two openings for exchanging substances with the outside, the openings are respectively the left end of the first liquid collecting pipe 1 and the right end of the first gas collecting pipe 2, the liquid refrigerant flows into the left end of the first liquid collecting pipe 1, and the gas refrigerant flows out from the upper end of the first gas collecting pipe 2 along the first gas collecting pipe 2.
When the heat exchanger during operation, the liquid refrigerant that enters into first heat exchange unit 10 can flow into each first heat exchange tube 5 of vertical arrangement under the action of gravity, thereby the heat gasification that liquid refrigerant absorption fin 6 provided is gaseous refrigerant, can have two kinds of situations this moment: when the liquid refrigerant can be completely vaporized after entering the first heat exchange tube 5, the gaseous refrigerant flows out of the first heat exchange unit 10 from the first gas collecting tube 2; after the liquid refrigerant enters the first heat exchange tube 5, the liquid refrigerant can not be completely vaporized, the gaseous refrigerant can flow out of the first heat exchange unit 10 along the first gas collecting tube 2, the liquid refrigerant can flow to the bottom of the first heat exchange unit 10 along the first gas collecting tube 2 under the action of gravity, the liquid refrigerant continues to be evaporated in the first heat exchange unit 10 until the liquid refrigerant is completely vaporized, if the liquid refrigerant accumulated at the bottom of the first heat exchange unit 10 is too much to block the bottom of the first heat exchange tube 5 with longer length, the gaseous refrigerant in the first heat exchange tube 5 with the blocked bottom can flow out of the top of the first heat exchange tube 5, flow to the first heat exchange tube close to the outlet side along the first liquid collecting tube 1, and finally flow out of the first heat exchange unit from the first gas collecting tube 2. Thus, the liquid refrigerant entering the first heat exchange unit 10 is guaranteed to be accumulated in the heat exchanger without being vaporized and not to flow out of the heat exchanger, and the liquid refrigerant flowing out of the refrigerant outlet is gaseous refrigerant.
The left end of the second liquid collecting pipe 3 is a refrigerant inlet end, and the right end of the second liquid collecting pipe 3 is a closed end. The second gas collecting tube 4 of the second heat exchange unit 20 is located above the second liquid collecting tube 3 of the second heat exchange unit 20, the right end of the second gas collecting tube 4 is a refrigerant outlet end, the left end of the second gas collecting tube 4 is communicated with a refrigerant inlet end of the second liquid collecting tube 3, and two ends of the second heat exchange tube 7 of the second heat exchange unit 20 are respectively communicated with the second liquid collecting tube 3 and the second gas collecting tube 4.
The lower end of the second gas collecting pipe 4 is connected with the inlet end of the second liquid collecting pipe 3. The upper end of the second gas collecting pipe 4 is a refrigerant outlet end, and the upper end of the second gas collecting pipe 4 is an outlet at the highest position where the second heat exchange unit 20 exchanges substances with the outside.
At least two second heat exchange tubes 7 are arranged between the second liquid collecting tube 3 and the second gas collecting tube 4, and the second heat exchange tubes 7 are vertically arranged. The lower end of the second heat exchange tube 7 is communicated with the second liquid collecting tube 3, the upper end of the second heat exchange tube 7 is communicated with the second gas collecting tube 4, two adjacent second heat exchange tubes 7 are arranged in parallel, the length of the second heat exchange tube 7 is gradually increased (or gradually decreased) from the refrigerant inlet end of the second liquid collecting tube 3 to the closed end of the second liquid collecting tube 3, and liquid refrigerant flowing into the second liquid collecting tube 3 from the refrigerant inlet end of the second liquid collecting tube 3 can flow into the second heat exchange tube 7 through a through opening between the second heat exchange tube 7 and the second liquid collecting tube 3.
A second fin 8 is arranged between every two adjacent second heat exchange tubes 7, the left side and the right side of each second fin 8 are respectively connected with the outer walls of every two adjacent second heat exchange tubes 7, and the second fins 8 are wavy.
The second heat exchange tube 7 adopts a flat tube.
The second heat exchange unit 20 is provided with two openings for exchanging substances with the outside, which are respectively the left end of the second liquid collecting pipe 3 and the right end of the second gas collecting pipe 4, the liquid refrigerant flows into the left end of the second liquid collecting pipe 3, and the gas refrigerant flows out from the upper end of the second gas collecting pipe 4 along the second gas collecting pipe 4.
The liquid refrigerant entering the second heat exchange unit 20 is accumulated in the second liquid collecting pipe 3 under the action of gravity, enters each second heat exchange pipe 7 of the second heat exchange unit 20 from the second liquid collecting pipe 3, is vaporized into a gaseous refrigerant in the second heat exchange pipes 7, enters the second gas collecting pipe 4 from the upper end of the second heat exchange pipe 7, and then flows out of the second heat exchange unit 20 from the refrigerant outlet end of the second gas collecting pipe 4 along the second gas collecting pipe 4.
If the liquid refrigerant accumulated in the second header pipe 3 is too much to block the heat exchange pipe with a short length, the gaseous refrigerant still rises to the second header pipe 4 under the action of buoyancy, and then flows out of the second heat exchange unit 20 from the refrigerant outlet end of the second header pipe 4 along the second header pipe 4. This ensures that the liquid refrigerant entering the second heat exchange unit 20 will be accumulated in the heat exchanger without being vaporized and will not flow out of the heat exchanger, so that the refrigerant flowing out of the refrigerant outlet is gaseous refrigerant.
The first gas collecting pipe 2 and the second gas collecting pipe 4 are arranged in parallel.
The invention also provides an air conditioner, and the micro-channel heat exchanger provided by the invention is applied to the air conditioner.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A microchannel heat exchanger is characterized by comprising a first heat exchange unit and a second heat exchange unit, the first heat exchange unit and the second heat exchange unit are arranged up and down and are not communicated, the first heat exchange unit comprises a first liquid collecting pipe arranged horizontally, a first gas collecting pipe arranged obliquely and a plurality of first heat exchange pipes arranged between the first liquid collecting pipe and the first gas collecting pipe, one end of the first liquid collecting pipe is a refrigerant inlet end, the other end of the first liquid collecting pipe is a closed end, the upper end of the first gas collecting pipe is a refrigerant outlet end, the first gas collecting pipe is positioned below the first liquid collecting pipe, the refrigerant outlet end of the first gas collecting pipe is positioned at the closed end of the first liquid collecting pipe, the lower end of the first gas collecting pipe is positioned right below a refrigerant inlet end of the first liquid collecting pipe, and two ends of the first heat exchange pipe are respectively communicated with the first liquid collecting pipe and the first gas collecting pipe;
the second heat exchange unit comprises a second liquid collecting pipe, a second gas collecting pipe and a plurality of second heat exchange pipes, the second liquid collecting pipe is horizontally arranged, the second gas collecting pipe is obliquely arranged, the plurality of second heat exchange pipes are arranged between the second liquid collecting pipe and the second gas collecting pipe, one end of the second liquid collecting pipe is a refrigerant inlet end, the other end of the second liquid collecting pipe is a closed end, the upper end of the second gas collecting pipe is a refrigerant outlet end, the second gas collecting pipe is located above the second liquid collecting pipe, the refrigerant outlet end of the second gas collecting pipe is located right above the closed end of the second liquid collecting pipe, the lower end of the second gas collecting pipe is located at the refrigerant inlet end of the second liquid collecting pipe, and two ends of each second heat exchange pipe are respectively communicated with the second.
2. The microchannel heat exchanger of claim 1, wherein the heat exchange tubes are vertically disposed.
3. The microchannel heat exchanger as claimed in claim 1, wherein the heat exchange tubes are arranged vertically, the number of the heat exchange tubes is at least two, adjacent two heat exchange tubes are parallel, and the length of the heat exchange tubes from the refrigerant inlet end of the header tube to the closed end of the header tube is gradually reduced or increased.
4. The microchannel heat exchanger as set forth in claim 1 or 2, wherein the number of the heat exchange tubes is at least two, and a fin is provided between adjacent two heat exchange tubes.
5. The microchannel heat exchanger of claim 4, wherein the fins are corrugated.
6. The microchannel heat exchanger of claim 1, wherein the heat exchange tubes are flat tubes.
7. The microchannel heat exchanger of claim 1, wherein a lower end of the second header communicates with a second header.
8. The microchannel heat exchanger of claim 1, wherein the first header is arranged in parallel with the second header.
9. An air conditioner characterized by comprising the microchannel heat exchanger of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811467282.0A CN109539634B (en) | 2018-12-03 | 2018-12-03 | Micro-channel heat exchanger and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811467282.0A CN109539634B (en) | 2018-12-03 | 2018-12-03 | Micro-channel heat exchanger and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109539634A CN109539634A (en) | 2019-03-29 |
| CN109539634B true CN109539634B (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811467282.0A Active CN109539634B (en) | 2018-12-03 | 2018-12-03 | Micro-channel heat exchanger and air conditioner |
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| CN (1) | CN109539634B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686054A (en) * | 2021-09-01 | 2021-11-23 | 中国人民解放军陆军工程大学 | Evaporator for power system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB672858A (en) * | 1950-08-24 | 1952-05-28 | Dole Refrigerating Co | Improvements in and relating to refrigerating or freezing plates |
| CN101691981B (en) * | 2009-07-23 | 2011-12-07 | 三花丹佛斯（杭州）微通道换热器有限公司 | Multi-channel heat exchanger with improved refrigerant fluid distribution uniformity |
| CN101865625B (en) * | 2010-06-29 | 2012-09-05 | 三花丹佛斯（杭州）微通道换热器有限公司 | Fin and heat exchanger provided with same |
| CN103743158B (en) * | 2014-01-06 | 2017-03-01 | 丹佛斯微通道换热器（嘉兴）有限公司 | Heat exchanger |
| CN105258411B (en) * | 2015-10-12 | 2018-02-13 | 杭州三花微通道换热器有限公司 | Gas-liquid separation pipe and heat exchanger for heat exchanger |
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2018
- 2018-12-03 CN CN201811467282.0A patent/CN109539634B/en active Active
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| CN109539634A (en) | 2019-03-29 |
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