CN215637598U - Air conditioner - Google Patents

Abstract

The utility model discloses an air conditioner, wherein a heat exchange loop comprises a heat exchanger, a plurality of flat pipes and a distributor, a partition plate is arranged in an inner cavity of the distributor and divides the inner cavity into a first cavity and a second cavity, a plurality of flow ports are arranged on the partition plate to communicate the first cavity with the second cavity, a refrigerant inlet is communicated with the first cavity, the flat pipes are communicated with the second cavity, a sunken part which is sunken towards one side far away from the refrigerant inlet is arranged at the position, opposite to the refrigerant inlet, on the partition plate, the space between the partition plate and the refrigerant inlet is increased, a buffer mixing space is provided for uniform mixing of gas-liquid two-phase refrigerants, uniform distribution of the refrigerants in the flat pipes is ensured, the heat exchange effect of the heat exchanger is improved, and the heat exchange performance of the air conditioner is improved.

Description

Air conditioner

Technical Field

The utility model relates to the technical field of air conditioners, in particular to an air conditioner with uniformly distributed refrigerant.

Background

Compared with a finned tube heat exchanger, the micro-channel heat exchanger has remarkable advantages in the aspects of material cost, refrigerant charge amount, heat flux density and the like, and accords with the development trend of energy conservation and environmental protection of the heat exchanger. Referring to fig. 1, the microchannel heat exchanger includes flat tubes 1, fins 2, a header 3, and the like. When the microchannel heat exchanger is used as an evaporator, when a gas-liquid two-phase refrigerant flows to the collecting pipe 3 through an inlet pipe on the right side in the figure, the liquid-phase refrigerant in the gas-liquid two-phase refrigerant sinks and the gas-phase refrigerant floats due to the influence of gravity and the reduction of the flow velocity caused by the sudden expansion of the flow channel space. After the gas-liquid two-phase refrigerant is separated, most of the flat tubes on the upper side are gas-phase refrigerants with weak heat exchange capacity, most of the flat tubes on the lower side are liquid-phase refrigerants with strong heat exchange capacity, and fins in contact with the flat tubes on the lower side can have the problems of condensation, icing and the like which influence heat exchange, so that the heat exchange capacity of the micro-channel heat exchanger can be further reduced.

Through the adjustment of the three-way reversing valve, the heat exchangers in the outdoor unit and the indoor unit of the air conditioner are used as condensers in a period of time, and are used as evaporators in a period of time. Therefore, when the microchannel heat exchanger is used as a heat exchanger in an outdoor unit and an indoor unit of an air conditioner, in order to ensure that the heat exchange of the microchannel heat exchanger for the air conditioner meets the requirements of comfort and energy efficiency, the problem of gas-liquid separation of the refrigerant at the inlet side must be solved.

In order to solve the problem, most of the prior arts are developed inside the collecting pipe, for example, a partition is added or a more complex structure is adopted, and the structural design and the manufacturing process are very complex and difficult. At present, the domestic micro-channel heat exchanger is mainly used for a single-cold heat exchanger, the heat exchanger of the household and commercial air conditioner is large in size, the structure still mainly adopts a tube-fin heat exchanger, and the micro-channel heat exchanger is rarely used.

The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may comprise prior art that does not constitute known to a person of ordinary skill in the art.

SUMMERY OF THE UTILITY MODEL

The utility model provides an air conditioner aiming at the problems pointed out in the background technology, which improves the internal structure of a distributor in a heat exchanger and realizes the uniform distribution of a gas-liquid two-phase refrigerant, thereby improving the heat exchange effect of the heat exchanger and improving the heat exchange performance of the air conditioner.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize:

in some embodiments of the present application, there is provided an air conditioner including:

the heat transfer return circuit for carry on indoor and outdoor heat exchange, be equipped with the heat exchanger on the heat transfer return circuit, the heat exchanger includes a plurality of flat pipes, still includes:

a distributor for uniformly distributing refrigerant into a plurality of said flat tubes, said distributor comprising:

a refrigerant inlet provided on one side wall of the distributor;

the flat pipe jacks are arranged on the other opposite side wall of the distributor, and the flat pipes are inserted into the corresponding flat pipe jacks;

the separator is arranged in the inner cavity of the distributor and divides the inner cavity into a first cavity and a second cavity, a plurality of circulation ports are formed in the separator to communicate the first cavity with the second cavity, the refrigerant inlet is communicated with the first cavity, the flat pipe is communicated with the second cavity, and a sunken part which is sunken towards one side far away from the refrigerant inlet is arranged at the position of the separator, which is right opposite to the refrigerant inlet.

In some embodiments, the contour of the recess is arc-shaped, and a projection of the recess to the refrigerant inlet side can cover the refrigerant inlet.

In some embodiments, a plurality of convex points and/or concave points are arranged on the side of the concave part facing the refrigerant inlet.

In some embodiments of this application, the distributor still includes casing and lid, the casing with the lid is connected and is formed the inner chamber, be equipped with on the lid the refrigerant entry, be equipped with on the casing flat tub of socket.

In some embodiments of the present application, the housing, the cover, and the partition are all formed by stamping.

In some embodiments of the present application, the cover and the housing, and the partition and the housing are welded and fixed respectively.

In some embodiments of the present application, a plurality of first pillars are disposed on the cover, and the first pillars abut against the partition.

In some embodiments of the present application, the housing is provided with a plurality of protruding arcs protruding toward the side of the partition, and the protruding arcs abut against the partition to divide the second cavity into a plurality of mutually independent sub-second cavities;

the plurality of flow openings are correspondingly communicated with the plurality of sub-second cavities, and the flat pipes are inserted into the corresponding sub-second cavities.

In some embodiments of the present application, a second upright column is disposed on the partition board, a jack is correspondingly disposed on the protruding arc portion, and the second upright column is inserted into the jack.

In some embodiments of the present application, the distance between the cover and the partition is 0.5-3 mm;

the shell is provided with a plurality of protruding parts protruding towards the side of the partition board, the protruding parts are provided with the flat pipe sockets, and the distance between the inner end faces of the protruding parts and the partition board is 0.5-8 mm.

Compared with the prior art, the utility model has the advantages and positive effects that:

in the air conditioner disclosed in the application, be equipped with the baffle in the inner chamber of distributor among the heat exchanger, first cavity and second cavity are separated into with the inner chamber to the baffle, are equipped with a plurality of circulation ports that supply the refrigerant circulation of arranging along the direction of height interval on the baffle, and circulation port is with first cavity and second cavity intercommunication, first cavity and refrigerant entry intercommunication, second cavity and flat tub of intercommunication. The position of the clapboard, which is opposite to the refrigerant inlet, is provided with a sunken part which is sunken towards one side far away from the refrigerant inlet. The space between the partition plate and the refrigerant inlet is increased due to the arrangement of the concave part, and a buffer mixing space is provided for uniform mixing of the gas-liquid two-phase refrigerant.

The gas-liquid two-phase refrigerant flowing from the refrigerant inlet firstly enters the buffer mixing space formed by the concave parts, the gas-liquid two-phase refrigerant is fully and uniformly mixed, then flows to other space regions of the first cavity and flows to the flat tubes through the circulating ports, and uniform distribution of the refrigerant in each flat tube is guaranteed, so that the heat exchange effect of the heat exchanger is improved, and the heat exchange performance of the air conditioner is improved.

Other features and advantages of the present invention will become more apparent from the following detailed description of the utility model when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a heat exchanger according to the prior art;

FIG. 2 is a schematic diagram of a heat exchanger according to an embodiment;

FIG. 3 is a schematic diagram of a dispenser according to an embodiment;

FIG. 4 is a cross-sectional view of a dispenser according to an embodiment;

fig. 5 is an exploded view of a dispenser according to an embodiment.

Reference numerals:

in fig. 1:

1-flat tube, 2-fin, 3-collecting tube;

in fig. 2 to 5:

10-a dispenser;

20-collecting main;

30-a fin;

40-flat tube;

50-an inlet tube;

60-an outlet pipe;

100-shell, 110-flat tube socket, 120-convex arc part, 130-convex part, 140-shell side plate and 150-shell peripheral plate;

200-partition plate, 210-circulation port, 220-concave part, 230-second upright post and 240-small flanging;

300-cover, 310-refrigerant inlet, 320-cover side plate, 330-cover flange, 340-first upright post;

410-first cavity, 420-second cavity, 421-sub-second cavity, 430-buffer mixing cavity.

Detailed Description

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 only a part of the embodiments of the present application, and not all of the 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.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the utility model. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

The utility model discloses an air conditioner, which comprises a heat exchange loop, wherein the heat exchange loop is used for exchanging indoor heat and outdoor heat so as to realize the adjustment of the air conditioner on the indoor temperature.

The heat exchange loop comprises an evaporator, a compressor, a condenser, an expansion valve and a four-way reversing valve, the phase change processes of the refrigerants in the evaporator and the condenser are opposite, and the evaporator and the condenser are collectively called as a heat exchanger.

Referring to fig. 2, the heat exchanger in this embodiment is a microchannel heat exchanger, the heat exchanger includes a plurality of flat tubes 40 and fins 30 arranged at equal intervals, a plurality of microchannels for circulating the refrigerant are formed in the flat tubes 40, the fins 30 are disposed between two adjacent flat tubes 40, the air flowing direction through the fins 30 is perpendicular to the flowing direction of the refrigerant flowing through the flat tubes 40, and the heat/cold released by the refrigerant in the flat tubes 40 is taken away by the heat dissipation fins and the air flow.

The flat tube 40 samples porous microchannel aluminum alloy, and the fin 30 is aluminum alloy with a brazing composite layer on the surface, so that the weight is light, and the heat exchange efficiency is high.

The heat exchanger further comprises a distributor 10 and a collecting pipe 20, when the heat exchanger is used as an evaporator, a gas-liquid two-phase refrigerant flows into the distributor 10 through an inlet pipe 50, the gas-liquid two-phase refrigerant is uniformly mixed and uniformly distributed into each flat pipe 40 by the distributor 10, heat exchange is carried out through the fins 30, and then the refrigerant in the flat pipes 40 flows out through the collecting pipe 20 and an outlet pipe 60.

The distributor 10 in this embodiment specifically realizes uniform distribution of the refrigerant to each flat tube through the following structure:

referring to fig. 4 and 5, a refrigerant inlet 310 is provided at one sidewall of the distributor 10, the refrigerant inlet 310 being connected to the inlet pipe 50; a plurality of flat tube sockets 110 arranged at intervals in the height direction are disposed on the other opposite side wall of the distributor 10, and the plurality of flat tubes 40 are inserted into the corresponding flat tube sockets 110.

A partition 200 is disposed in the interior chamber of the dispenser 10, and the partition 200 divides the interior chamber into a first chamber 410 and a second chamber 420.

The partition plate 200 is provided with a plurality of flow ports 210 for the refrigerant to flow therethrough, which are arranged at intervals in the height direction, and the flow ports 210 communicate the first chamber 410 with the second chamber 420.

The refrigerant inlet 310 communicates with the first chamber 410, and the flat tube 40 communicates with the second chamber 420.

The gas-liquid two-phase refrigerant flowing from the inlet pipe 50 flows into the first chamber 410 through the refrigerant inlet 310, enters the second chamber 420 through the communication port 210, and flows into the flat tube 40.

The partition plate 200 is provided with a recess 220 recessed toward a side away from the refrigerant inlet 310 at a position facing the refrigerant inlet 310.

The provision of the recess 220 increases the space between the partition 200 and the refrigerant inlet 310, which provides a buffer mixing space 430 for uniform mixing of the gas-liquid two-phase refrigerant.

The gas-liquid two-phase refrigerant flowing from the refrigerant inlet 310 firstly enters the buffer mixing space 430 formed by the concave part 220, and the gas-liquid two-phase refrigerant is fully and uniformly mixed and then flows to other space regions of the first cavity 410, flows to the flat tubes 40 through the flow opening 210, and ensures uniform distribution of the refrigerant in each flat tube 40, so that the heat exchange effect of the heat exchanger is improved, and the heat exchange performance of the air conditioner is improved.

Along the height direction of the distributor 10, the refrigerant inlet 310 is disposed at the middle position, and correspondingly, the recess 220 is also disposed at the middle position of the first cavity 410 in the height direction, so as to avoid the influence of a part of gravity and further ensure the distribution uniformity of the gas-liquid two-phase refrigerant.

Regarding the specific structure of the concave portion 220, in some embodiments of the present application, referring to fig. 4 and 5, the contour of the concave portion 220 is an arc shape, and a smooth line shape facilitates the flow of the refrigerant; the center of the recess 220 is opposite to the center of the refrigerant inlet 310 to increase the volume of the buffering and mixing space 430 as much as possible, which helps to improve the uniform mixing effect of the gas-liquid two-phase refrigerant; the upper and lower sides of the recess 220 gradually transition to the partition 200 areas at both sides in an arc shape, respectively, to play a certain role in guiding the refrigerant.

Of course, in other embodiments, the recess 220 may have other configurations and contours.

The projection of the recess 220 toward the refrigerant inlet 310 side can cover the refrigerant inlet 310, ensuring that the refrigerant flowing in from the refrigerant inlet 310 can flow into the buffer mixing space 430.

The side of the recess 220 facing the refrigerant inlet 310 is provided with a plurality of convex and/or concave points (not shown) for further optimizing the uniform mixing of the gas-liquid two-phase refrigerant.

Regarding the specific structure of the dispenser 10, in some embodiments of the present application, referring to fig. 4 and 5, the dispenser 10 further includes a housing 100 and a cover 300, wherein the housing 100 and the cover 300 are connected to form an inner cavity. The cover 300 is provided with a refrigerant inlet 310, and the housing 100 is provided with a flat pipe socket 110.

The dispenser is composed of three parts, namely a shell 100, a cover 300 and a partition plate 200, and the whole structure is simple and convenient to process and assemble.

The case 100, the cover 300, and the partition 200 are formed by press molding.

The housing 100 includes a housing side plate 140 and a housing peripheral plate 150, and the flat tube insertion opening 110 is formed on the housing side plate 140.

The cover 300 includes a cover side plate 320 and a cover flange 330, and the refrigerant inlet 310 is formed on the cover side plate 320.

During production, the shell 100, the cover 300 and the partition 200 are respectively punched; installing the partition board 200 into the shell 100, wherein the periphery of the partition board 200 is provided with a small flanging 240, and the small flanging 240 is welded and fixed with the inner peripheral wall of the shell peripheral plate 150; then, the cover 300 is mounted on the housing 100, and the cover flange 330 is welded and fixed to the inner peripheral wall of the housing peripheral plate 150, thereby completing the assembly. The welding process is preferably brazing.

In some embodiments of the present application, the housing (specifically, the housing side plate 140) is provided with a plurality of protruding arcs 120 protruding toward the partition plate 200, and the protruding arcs 120 abut against the partition plate 200 to separate the second cavity 420 into a plurality of sub-second cavities 421 independent of each other.

The plurality of circulation ports 210 are correspondingly communicated with the plurality of sub-second cavities 421, and the plurality of flat tubes 40 are inserted into the corresponding sub-second cavities 421.

When the refrigerant flows into the flat pipe 40 from the circulation port 210, a part of the refrigerant directly impacts and flows into the flat pipe 40, the rest of the refrigerant is buffered into the corresponding sub-second cavity 421, and is continuously mixed in each independent sub-second cavity 421, and then flows back into the flat pipe 40, so that the uniform distribution of the gas-liquid two-phase refrigerant in each flat pipe 40 is further improved.

In order to improve the assembling reliability, in some embodiments of the present application, the partition board 200 is provided with a plurality of second studs 230, the protruding arc portion 120 is correspondingly provided with insertion holes (not labeled), and the second studs 230 are inserted into the corresponding insertion holes.

The cover (specifically, the cover side plate 320) is provided with a plurality of first vertical posts 340, and the first vertical posts 340 abut against the partition board 200.

During production and assembly, the second upright posts 230 are inserted into the corresponding insertion holes, the partition board 200 is initially positioned, the convex arc part 120 abuts against the partition board 200, and then the partition board 200 is fixed on the shell 100 through brazing; then, the cover 300 is installed, the first upright 340 abuts against the partition board 200, the gap between the cover 300 and the partition board 200 is fixed, and then the cover flange 330 is fixed to the housing peripheral plate 150 by brazing.

In this embodiment, the distance between the cover 300 and the partition plate 200 and the distance between the partition plate 200 and the casing 100 are also optimized, so as to further improve the refrigerant distribution uniformity, specifically as follows:

the distance between the cover body (specifically the cover body side plate 320) and the partition board 200 is 0.5-3 mm;

the shell (specifically, the shell side plate 140) is provided with a plurality of protrusions 130 protruding towards the partition plate 200, the protrusions 130 are provided with flat pipe sockets 110, and the distance between the inner end face of each protrusion 230 and the partition plate 200 is 0.5-8 mm.

The three-part structure of the distributor 10 in this embodiment is convenient for processing and assembling, and also convenient for assembling the flat tubes.

The distributor 10 in the embodiment can solve the problem of the gas-liquid distributor at the inlet side of the large-size microchannel heat exchanger, and compared with the conventional copper tube aluminum fin heat exchanger, the distributor has the advantages of high heat exchange capacity and energy efficiency and capability of reducing the cost.

In other embodiments of the present application, the cover 300 and the partition 200 may be machined to form an integral structure, and then assembled with the housing 100, so as to reduce the number of parts and facilitate assembly.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An air conditioner comprising:

the heat exchange loop is used for exchanging heat indoors and outdoors, a heat exchanger is arranged on the heat exchange loop, and the heat exchanger comprises a plurality of flat pipes;

characterized in that, the heat exchanger still includes:

a distributor for uniformly distributing refrigerant into a plurality of said flat tubes, said distributor comprising:

a refrigerant inlet provided on one side wall of the distributor;

the flat pipe jacks are arranged on the other opposite side wall of the distributor, and the flat pipes are inserted into the corresponding flat pipe jacks;

the separator is arranged in the inner cavity of the distributor and divides the inner cavity into a first cavity and a second cavity, a plurality of circulation ports are formed in the separator to communicate the first cavity with the second cavity, the refrigerant inlet is communicated with the first cavity, the flat pipe is communicated with the second cavity, and a sunken part which is sunken towards one side far away from the refrigerant inlet is arranged at the position of the separator, which is right opposite to the refrigerant inlet.

2. The air conditioner according to claim 1,

the contour of the concave part is arc-shaped, and the projection of the concave part towards the refrigerant inlet side can cover the refrigerant inlet.

3. The air conditioner according to claim 1,

the side of the depressed part facing the refrigerant inlet is provided with a plurality of convex points and/or concave points.

4. The air conditioner according to any one of claims 1 to 3,

the distributor further comprises a shell and a cover body, the shell is connected with the cover body to form the inner cavity, the cover body is provided with the refrigerant inlet, and the shell is provided with the flat pipe socket.

5. The air conditioner according to claim 4,

the casing, the lid and the baffle all stamping forming.

6. The air conditioner according to claim 4,

the cover body and the shell and the partition plate and the shell are welded and fixed respectively.

7. The air conditioner according to claim 4,

the cover body is provided with a plurality of first stand columns, and the first stand columns are abutted to the partition plate.

8. The air conditioner according to claim 4,

the shell is provided with a plurality of convex arc parts protruding towards the side of the partition board, and the convex arc parts are abutted against the partition board to divide the second cavity into a plurality of mutually independent sub-second cavities;

the plurality of flow openings are correspondingly communicated with the plurality of sub-second cavities, and the flat pipes are inserted into the corresponding sub-second cavities.

9. The air conditioner according to claim 8,

the partition board is provided with a second upright post, the convex arc part is correspondingly provided with a jack, and the second upright post is inserted into the jack.

10. The air conditioner according to claim 4,

the distance between the cover body and the clapboard is 0.5-3 mm;

the shell is provided with a plurality of protruding parts protruding towards the side of the partition board, the protruding parts are provided with the flat pipe sockets, and the distance between the inner end faces of the protruding parts and the partition board is 0.5-8 mm.

Images