CN211695162U

CN211695162U - Air conditioner

Info

Publication number: CN211695162U
Application number: CN202020163956.4U
Authority: CN
Inventors: 刘晓蕾; 张恒; 曹法立; 孟建军; 唐亚洲
Original assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Current assignee: Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date: 2020-02-12
Filing date: 2020-02-12
Publication date: 2020-10-16
Anticipated expiration: 2030-02-12

Abstract

The utility model discloses an air conditioner, it includes heat transfer circuit, and heat exchanger in the heat transfer circuit includes flat pipe and collecting main, and the tip of flat pipe has the throat portion, and the collecting main includes the body and locates the connecting portion on the body, and connecting portion are towards the outside protrusion of body, and the inside of body is formed with the inner chamber, and connecting portion have the jack, and jack and inner chamber intercommunication, throat portion insert locate in the jack to make flat pipe and inner chamber intercommunication, make the refrigerant can circulate between flat pipe and collecting main. Through the connection between the flat pipe and the convex connecting part, the effective circulation volume of the refrigerant in the inner cavity of the collecting pipe can be improved, so that the flow demand of the refrigerant can be met by the collecting pipe with smaller inner cavity volume; meanwhile, the flow velocity of the refrigerant can be increased by reducing the volume of the inner cavity, so that the separation phenomenon of the gas-liquid two-phase refrigerant in the inner cavity of the collecting pipe is inhibited, the flow dividing and converging uniformity of the collecting pipe on the refrigerant is improved, and the overall heat exchange performance of the air conditioner is improved.

Description

Air conditioner

Technical Field

The utility model relates to a refrigeration plant technical field especially relates to an air conditioner that refrigerant distribution is even.

Background

At present, a heat pump type air conditioner is a kind of cooling and heating air conditioner which is often used. When cooling in summer, the air conditioner cools indoors and radiates heat outdoors, and when heating in winter, the direction is opposite to that in summer, namely, the air conditioner heats indoors and cools outdoors. The air conditioner exchanges heat and cold between different environments through a heat pump. For example, in winter, outdoor air, ground water, underground water and the like are low-temperature heat sources, indoor air is a high-temperature heat source, and the heat pump type air conditioner is used for transferring heat of an outdoor environment into the indoor environment.

Referring to fig. 1, a schematic diagram of a heating cycle of a heat pump in the prior art is shown. The heat pump includes: the system comprises an evaporator 1, a compressor 2, a condenser 3, an expansion valve 4 and a four-way reversing valve C. The specific working process of the heat pump heating is as follows: first, a low-pressure two-phase refrigerant (a mixture of a liquid-phase refrigerant and a gas-phase refrigerant) in the evaporator 1 absorbs heat from a low-temperature environment; the gas refrigerant is sucked by the compressor 2 and then compressed into a high-temperature high-pressure gas refrigerant; then, the high-temperature and high-pressure gas refrigerant releases heat energy to the indoor environment in the condenser 3, and the temperature of the gas refrigerant is reduced; finally, the refrigerant is throttled by the expansion valve mechanism 4 to become a low-temperature low-pressure two-phase refrigerant, and the refrigerant enters the evaporator 1 again, and the above-described cycle heating process is repeated. The heat exchanger described herein comprises the evaporator 1 and the condenser 3 described above.

The heat pump air conditioner changes the working condition mode through the four-way reversing valve C. Under the refrigeration working condition in summer, the indoor heat exchanger is used as the evaporator 1, and the outdoor heat exchanger is used as the condenser 3. The indoor air is cooled down by the surface of the evaporator 1 to achieve the purpose of reducing the indoor temperature, and the heat is transmitted to the outdoor through the condenser 3. When heat is supplied in winter, the position of the valve block C of the four-way reversing valve is changed, so that the flow direction of the refrigerant is changed, and at the moment, the refrigerant absorbs heat in the environment through the outdoor heat exchanger and releases heat to the indoor environment, so that the purpose of heating is achieved.

The evaporator 1 is a device for outputting cold energy, and functions to evaporate the refrigerant liquid flowing in through the expansion valve 4 to absorb heat of the object to be cooled, thereby achieving the purpose of refrigeration. The condenser 3 is a device for outputting heat, and the heat absorbed from the evaporator 1 and the heat converted by the work consumed by the compressor 2 are carried away by the cooling medium in the condenser 3, so as to achieve the purpose of heating. The evaporator 1 and the condenser 3 are important parts for heat exchange in the air-conditioning heat pump unit, and the performance of the evaporator and the condenser directly affects the performance of the whole system.

Compared with a finned tube heat exchanger, the micro-channel heat exchanger has remarkable advantages in the aspects of material cost, refrigerant filling amount, heat flux density and the like, and accords with the development trend of energy conservation and environmental protection of the heat exchanger. The microchannel heat exchanger comprises components such as flat tubes, fins and collecting pipes, wherein the flat tubes are communicated with the collecting pipes to realize the shunting and confluence of the refrigerant. The volume of the inner cavity of the existing collecting pipe is too large, so that the quantity of refrigerant which needs to be filled in the heat exchanger and the refrigerating system is increased on one hand, the flow speed of the refrigerant in the collecting pipe is reduced on the other hand, and the condition of uneven flow is easy to occur when the refrigerant is distributed to a plurality of groups of flat pipes from the collecting pipe, thereby affecting the refrigerating/heating performance of the air conditioner.

One of the reasons for the large volume of the inner cavity of the collecting pipe is that the side wall of the existing collecting pipe is provided with a slot for inserting the flat pipe, the slot is formed by punching a die to the inner cavity side of the collecting pipe, so that the port of the slot is sunken towards the inner cavity of the collecting pipe, and after the flat pipe is inserted into the slot, the brazing flux on the outer surface of the collecting pipe, which is close to the slot part, is melted with the brazing filler metal to complete welding. In order to ensure the welding quality, the flat pipe must pass through the slot and be inserted into the inner cavity of the collecting pipe to a certain depth. This results in a significant portion of the cross-sectional flow area within the manifold chamber being ineffective (e.g., more than 50% of the cross-sectional flow area would be ineffective for a typical O-manifold).

Disclosure of Invention

In view of this, the present invention provides an air conditioner, the collecting pipe thereof has a smaller inner cavity volume, better refrigerant shunting and converging uniformity, and further improves the heat exchange performance of the air conditioner.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an air conditioner, include: the heat exchange loop is used for exchanging heat indoors and outdoors, and a heat exchanger is arranged on the heat exchange loop; the heat exchanger includes:

the flat pipe is used for circulating a refrigerant, and the end part of the flat pipe is provided with a necking part;

the collecting pipe is used for circulating a refrigerant and comprises a body and a connecting part arranged on the body, the connecting part protrudes towards the outer side of the body, an inner cavity is formed inside the body, the connecting part is provided with a jack, and the jack is communicated with the inner cavity;

the necking part is inserted into the jack, so that the flat pipe is communicated with the inner cavity.

Further, the free end of the choke is located in the socket.

Further, the necking part is in interference fit with the jack.

Further, the necking part is connected with the connecting part in a brazing mode.

Further, the body and the connecting part are integrally processed and formed.

Further, the body and the connecting portion are formed by processing the same plate, the connecting portion is formed by stamping the plate, and the body is formed by bending the plate.

Further, the inner surface of the plate is coated with a brazing flux composite layer.

Furthermore, the number of the connecting parts is multiple, and the connecting parts are arranged on the body at equal intervals.

Furthermore, both ends of the inner cavity are sealed, and the body is provided with a refrigerant circulation port communicated with the inner cavity.

Further, the cross section of the inner cavity is rectangular, O-shaped or D-shaped.

The technical scheme of the utility model prior art relatively has following technological effect:

in the heat exchange loop of the air conditioner disclosed in the application, the heat exchanger includes flat pipe and collecting main, and the tip of flat pipe has the throat, and the collecting main includes the body and locates the connecting portion on the body, and connecting portion are towards the outside protrusion of body, and the inside of body is formed with the inner chamber, and connecting portion have the jack, jack and inner chamber intercommunication, and the throat is inserted and is located in the jack to make flat pipe and inner chamber intercommunication, make the refrigerant can circulate between flat pipe and collecting main. Through the connection between the flat pipe and the convex connecting part, the effective circulation volume of the refrigerant in the inner cavity of the collecting pipe can be improved, so that the flow demand of the refrigerant can be met by the collecting pipe with smaller inner cavity volume; meanwhile, the flow velocity of the refrigerant can be increased by reducing the volume of the inner cavity, so that the separation phenomenon of the gas-liquid two-phase refrigerant in the inner cavity of the collecting pipe is inhibited, the flow dividing and converging uniformity of the collecting pipe on the refrigerant is improved, and the overall heat exchange performance of the air conditioner is improved.

Drawings

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

FIG. 1 is a schematic diagram of a prior art air conditioner;

fig. 2 is a schematic view of a connection structure between a flat tube and a collecting pipe according to an embodiment of the air conditioner of the present invention;

fig. 3 is a side view of a connection structure between a flat tube and a collecting pipe according to an embodiment of the present invention;

fig. 4 is a top view of a connection structure between a flat tube and a collecting pipe according to an embodiment of the air conditioner of the present invention;

fig. 5 is a schematic structural diagram of a collecting pipe according to an embodiment of the air conditioner of the present invention;

fig. 6 is a schematic structural view of a flat tube according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a flat tube according to an embodiment of the present invention, as viewed from an end thereof;

fig. 8 is a schematic structural diagram of a heat exchanger according to an embodiment of the present invention.

Reference numerals:

1-evaporator, 2-compressor, 3-condenser, 4-expansion valve, 5-four-way reversing valve;

10-a heat exchanger;

20-collecting main, 21-main, 211-inner, 22-connecting, 221-jack;

30-flat tube, 31-flat tube main body part, 32-necking part;

40-fins.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. 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 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 invention, "a plurality" means two or more unless otherwise specified.

The utility model discloses an air conditioner indicates heat pump type air conditioner especially, and the air conditioner includes heat transfer circuit for carry out indoor and outdoor heat exchange, in order to realize the air conditioner to indoor temperature's regulation.

The heat exchange circuit can adopt the heat exchange principle shown in the prior art fig. 1, that is, the heat exchange circuit comprises an evaporator 1, a compressor 2, a condenser 3, an expansion valve 4 and a four-way reversing valve C, the phase change processes of the refrigerants in the evaporator 1 and the condenser 3 are opposite, and the evaporator 1 and the condenser 3 are collectively called as a heat exchanger.

The heat exchanger 10 includes the collecting main 20, the flat pipe 30, the fin 40, etc., refer to fig. 8, the collecting main 20 is provided at both ends of the flat pipe 30, and the refrigerant flows through the flat pipe 30 and the collecting main 20. Fig. 2 shows a view in which only one end of the flat tube 30 is connected to the header 20.

Referring to fig. 6, the free end of the flat tube 30 has a throat 32. Referring to fig. 5, the header 20 includes a body 21 and a connection portion 22 provided on the body 21, the connection portion 22 protrudes toward an outer side of the body 21, an inner cavity 211 is formed inside the body 21, the connection portion 22 has a socket 221, and the socket 221 communicates with the inner cavity 211. Referring to fig. 2 and 3, the choke portion 32 is inserted into the insertion hole 221 to communicate the flat tube 30 with the inner cavity 211, so that the refrigerant can flow between the flat tube 30 and the header 20.

Through the connection between the flat tube 30 and the convex connecting part 22, the effective circulation volume of the refrigerant in the inner cavity 211 of the collecting pipe can be improved, so that the flow demand of the refrigerant can be met by the collecting pipe 20 with smaller inner cavity volume; meanwhile, the flow velocity of the refrigerant can be increased by reducing the volume of the inner cavity 211, so that the separation phenomenon of the gas-liquid two-phase refrigerant in the inner cavity 211 of the collecting pipe is inhibited, the flow distribution and convergence uniformity of the collecting pipe 20 to the refrigerant is improved, and the overall heat exchange performance of the air conditioner is improved.

As a preferred embodiment, referring to fig. 4, when the throat 32 is inserted into the insertion hole 221, the free end of the throat 32 is located inside the insertion hole 221, in other words, the free end of the throat 32 is not located in the inner cavity 211, so as to avoid the influence on the effective refrigerant flow volume of the inner cavity 211 due to the fact that the throat 32 is located in the inner cavity 211.

Referring to fig. 6 and 7, the structural schematic diagram of the single flat tube 30 includes a flat tube main body portion 31 and necking portions 32 provided at two ends of the flat tube main body portion 31, where the necking portions 32 at two ends are used for connecting with the collecting pipes 20 at two sides.

Referring to fig. 7, the transverse width of the flat tube body portion 31 is defined as W1, the longitudinal width of the flat tube body portion 31 is defined as T1, the transverse width of the throat portion 32 is defined as W2, and the longitudinal width of the throat portion 32 is defined as T2. The transverse width W2 of the choke portion 32 and the longitudinal width T2 of the choke portion 32 are both gradually reduced from the flat tube main body 31 to the free end of the choke portion 32, and correspondingly, the shape of the insertion hole 221 on the connecting portion 22 is matched with that of the choke portion 32, so that the interference fit between the choke portion 32 and the insertion hole 221 is realized.

When the flat tube 30 is mounted on the header pipe 20, referring to fig. 2, the flat tube 30 is inserted into the inner cavity 211 of the header pipe outside the header pipe 20, and the flat tube 30 and the connection portion 22 can be fixedly connected by interference fit between the throat portion 32 and the insertion hole 221. Moreover, the end part of the flat pipe 30 can be easily prevented from being inserted into the inner cavity 211 through interference fit between the two, and the improvement of the installation efficiency is facilitated.

In order to further improve the connection reliability between the necking portion 32 and the connection portion 22, before the flat tube 30 is mounted, after the flat tube 30 is inserted into the insertion hole 221, the necking portion 32 and the connection portion 22 are brazed in a brazing furnace.

As a preferred embodiment, the main body 21 and the connecting portion 22 are integrally formed, so that the overall structure of the header 20 is more reliable and the processing efficiency is improved.

In this embodiment, the main body 21 and the connecting portion 22 are formed by processing the same plate (preferably, an aluminum alloy plate), specifically, the plate is stamped to form the connecting portion 22, then the plate is bent to form the main body 21, when the aluminum alloy is bent, the connecting portion 22 is positioned outside the main body 21, and finally, two side edges of the plate are brazed.

Furthermore, the brazing flux composite layer is coated on the inner surface of the plate for manufacturing the body 21 and the connecting portion 22, so that when the plate is stamped to form the connecting portion 22, the brazing flux composite layer is arranged on the inner surface of the connecting portion 22, namely the insertion hole 221, and after the collecting pipe 20 is machined, the necking portion 32 is directly inserted into the insertion hole 221 to be connected in a brazing mode, and therefore the assembly efficiency of the flat pipe 30 and the collecting pipe 20 is greatly improved.

In any of the above embodiments, the number of the connection portions 22 is multiple, and the connection portions 22 are arranged on the body 21 at equal intervals, which is helpful for improving the uniformity of heat exchange of the heat exchanger 10.

In any of the above embodiments, both ends of the inner cavity 211 are closed, and the body 21 is provided with a refrigerant flow port (not shown) communicated with the inner cavity 211 to ensure that a refrigerant can enter the inner cavity 211 of the collecting main or flow out of the inner cavity 211 of the collecting main, thereby ensuring that the heat exchanger 10 can participate in refrigerant circulation and ensuring the use reliability of the heat exchanger 10.

In any of the above embodiments, the cross-sectional shape of the interior cavity 211 is rectangular, or O-shaped, or D-shaped, and in this embodiment is rectangular.

In any of the above embodiments, the flat tube 30 is made of aluminum alloy, so that the heat exchange efficiency is high.

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 is only a specific embodiment of the present invention, but the protection 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 should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An air conditioner comprising:

the heat exchange loop is used for exchanging heat indoors and outdoors, and a heat exchanger is arranged on the heat exchange loop;

characterized in that the heat exchanger comprises:

2. The air conditioner according to claim 1,

the free end of the choke is located within the socket.

3. The air conditioner according to claim 2,

the necking part is in interference fit with the jack.

4. The air conditioner according to claim 3,

the necking part is connected with the connecting part in a brazing mode.

5. The air conditioner according to claim 1,

the body and the connecting part are integrally processed and formed.

6. The air conditioner according to claim 5,

the body and the connecting portion are formed by processing the same sheet material, the connecting portion is formed by stamping the sheet material, and the sheet material is bent to form the body.

7. The air conditioner according to claim 6,

and the inner surface of the plate is coated with a brazing flux composite layer.

8. The air conditioner according to any one of claims 1 to 6,

the number of the connecting parts is multiple, and the connecting parts are arranged on the body at equal intervals.

9. The air conditioner according to any one of claims 1 to 6,

the two ends of the inner cavity are sealed, and the body is provided with a refrigerant circulation port communicated with the inner cavity.

10. The air conditioner according to any one of claims 1 to 6,

the cross section of the inner cavity is rectangular, O-shaped or D-shaped.