CN211177519U - Heat exchanger and air conditioner having the same - Google Patents

Abstract

The utility model relates to a heat exchanger and an air conditioner having the same. The utility model provides a heat exchanger comprising: a refrigerant cavity, which defines a accommodating cavity; a first pipeline, which has a first end located outside the refrigerant cavity, and a first pipe located at the lower part of the accommodating cavity two ends; a second pipeline having a first end located outside the refrigerant cavity and a second end located at an upper portion of the accommodating cavity; and a heat exchange part disposed outside the refrigerant cavity, and the exchange The hot part has at least one refrigerant passage, one end of each refrigerant passage communicates with the lower part of the accommodating cavity, and the other end communicates with the upper part of the accommodating cavity. The utility model also provides an air conditioner with the above heat exchanger. The heat exchanger has high heat exchange efficiency and low cost.

Description

Heat exchanger and air conditioner having the same

technical field

The utility model relates to the field of refrigeration and heating, in particular to a heat exchanger and an air conditioner having the same.

Background technique

With the development of science and technology, the development of social economy and the improvement of people's living standards, high comfort has become a high demand for users, and air conditioners have become an indispensable household appliance in people's daily life. The air-conditioning refrigeration system is mainly formed by connecting the compressor, condenser, air-conditioning expansion valve and evaporator through refrigerant pipes. When the air conditioner is in refrigeration operation, the low-temperature and low-pressure refrigerant gas is inhaled by the compressor and becomes a high-temperature and high-pressure refrigerant gas. The high-temperature and high-pressure refrigerant gas releases heat in the outdoor condenser and becomes a normal temperature and high pressure refrigerant liquid. After being throttled and depressurized by the air-conditioning expansion valve, it becomes a low-temperature and low-pressure refrigerant liquid. The low-temperature and low-pressure refrigerant liquid refrigerant absorbs heat in the indoor evaporator and evaporates into a low-temperature and low-pressure refrigerant gas, and then enters the compressor again for compression, and so on. The cycle completes the air conditioning refrigeration system. Existing evaporators for air conditioners usually use tube-fin evaporators, and the inventors found that the existing evaporators still need to be optimized.

Utility model content

The purpose of the first aspect of the present invention is to provide an optimized heat exchanger.

The purpose of the second aspect of the present invention is to provide an air conditioner with the above heat exchanger.

According to the first aspect of the present utility model, the utility model proposes a heat exchanger, which includes:

a refrigerant cavity, which defines an accommodating cavity;

a first pipeline, having a first end located outside the refrigerant cavity, and a second end located at a lower part of the accommodating cavity;

a second pipeline, having a first end located outside the refrigerant chamber, and a second end located at an upper portion of the accommodating chamber; and

The heat exchange part is arranged outside the refrigerant cavity, and the heat exchange part has at least one refrigerant passage, one end of each refrigerant passage communicates with the lower part of the accommodating cavity, and the other end communicates with the upper part of the accommodating cavity.

Optionally, the heat exchanger further includes a gas-liquid spacing structure, which is arranged in the accommodating cavity to divide the accommodating cavity into an upper cavity and a lower cavity, and the gas-liquid spacing structure has at least one connection with the upper cavity. and the communication hole of the lower cavity;

The second end of the first pipeline communicates with the lower cavity;

The second end of the second pipeline communicates with the upper cavity.

Optionally, the refrigerant cavity is located at a central position of the heat exchange part.

Optionally, the lower end of the accommodating cavity is provided with a first cavity communicating with each of the refrigerant passages, and the upper surface of the first cavity is provided with a first communication port communicating with the accommodating cavity.

Optionally, an upper end of the accommodating cavity is provided with a second cavity communicating with each of the refrigerant passages, and a lower surface of the second cavity is provided with a second communication port communicating with the accommodating cavity;

The second end of the second pipeline is communicated with the second cavity.

Optionally, the heat exchanger further includes a plurality of first branches and a plurality of second branches;

The refrigerant passages are multiple and extend along the axial direction of the accommodating cavity;

Each of the first branches communicates with the lower part of the accommodating cavity, and each of the first branches is connected to the lower ends of one or more refrigerant passages

Each of the second branches communicates with the upper part of the accommodating cavity, and each of the second branches is connected to the upper ends of one or more refrigerant passages.

Optionally, the heat exchanger further includes a casing; the heat exchange part and the refrigerant cavity are arranged in the casing; the casing is a heat-conducting casing.

Optionally, the heat exchange part further includes at least one or more heat exchange cylinders arranged coaxially, and one or more of the refrigerant passages are provided on the cylinder wall of each of the heat exchange cylinders; or,

The heat exchange part further includes a plurality of heat exchange plates, which are arranged on the outer side of the refrigerant cavity at intervals along the circumferential direction of the refrigerant cavity, and each of the heat exchange plates is provided with one or more heat exchange plates. the refrigerant channel.

Optionally, the heat exchange part is an integral piece, and is formed by an extrusion process; or,

The heat exchange part and the refrigerant cavity are formed as an integral piece and formed by an extrusion process; or, the heat exchanger is an integral piece and formed by an extrusion process.

According to a second aspect of the present utility model, the present utility model provides an air conditioner comprising an evaporator and a condenser, wherein the evaporator and/or the condenser adopts any of the above-mentioned heat exchangers.

In the heat exchanger and the air conditioner of the present invention, because of the special connection relationship between the refrigerant cavity and the heat exchange part, when the heat exchanger is used as an evaporator, the gas-liquid mixture can pass through the first pipe. After the passage enters the heat exchanger, the saturated steam can directly rise in the accommodating cavity and exchange heat with the refrigerant or air outside the refrigerant cavity. . Of course, the heat exchanger can also be used as a condenser. For example, the heat exchanger is used as an indoor heat exchanger for an air conditioner, as an evaporator for cooling in summer, and as a condenser for heating in winter.

Further, in the heat exchanger of the present invention, the gas-liquid spacer structure is arranged to allow ventilation through the communication holes to block the refrigerant liquid, thereby further improving the heat exchange performance.

Further, the utility model of the present utility model also found that: the existing tube-fin evaporators are larger in volume, higher in cost, more complicated in production process, and the local resistance of refrigerant pipelines such as elbows is larger, which affects heat exchange. The performance is improved; and because the heat exchange area is too large, the convective heat transfer intensity relying on the fan to disturb the air flow is insufficient. The heat exchanger with gas-liquid separation of the present invention can solve these problems. Part or all of the components of the heat exchanger are integrally extruded, that is, integral molding, and the structure of the heat exchanger can optimize the airflow organization of the heat exchanger, improve the strength of convection heat transfer, and reduce the number of refrigerant pipes. For example, the local resistance of the elbow improves the heat transfer coefficient, realizes the purpose of reducing production costs, reducing production processes (integrated extrusion, integrated molding), and reducing occupied space, and promotes the improvement of air conditioning energy efficiency.

Further, the heat exchanger of the present invention can be connected in series or in parallel with the traditional tube-fin heat exchanger, depending on the control scheme of the refrigeration system and the climatic conditions of the area where the air conditioner is used.

Further, the heat exchanger of the present invention can have a heat-conducting shell, which can be used for radiant heat exchange. Convective heat exchange can be used inside the heat-conducting shell. On the premise of the ability to reduce the wind blowing of the human body, increase the thermal comfort of the human body; especially when heating in winter, the radiant heat transfer can significantly increase the thermal comfort of the human body.

The above and other objects, advantages and features of the present invention will be more apparent to those skilled in the art from the following detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of example and not limitation with reference to the accompanying drawings. The same reference numbers in the figures designate the same or similar parts or parts. It will be understood by those skilled in the art that the drawings are not necessarily to scale. In the attached picture:

1 is a schematic cross-sectional view of a heat exchanger according to an embodiment of the present invention.

Detailed ways

1 is a schematic cross-sectional view of a heat exchanger according to an embodiment of the present invention. As shown in FIG. 1 , an embodiment of the present invention provides a heat exchanger, which includes a refrigerant cavity 10 , a first pipeline 11 , a second pipeline 12 and a heat exchange part 20 . An accommodation cavity is defined in the refrigerant cavity 10 . The first pipe 11 has a first end located outside the refrigerant cavity 10 and a second end located at a lower portion of the accommodating cavity. The second pipeline 12 has a first end located outside the refrigerant cavity 10 and a second end located at an upper portion of the accommodating cavity. The heat exchange part 20 is disposed outside the refrigerant cavity 10 and has at least one refrigerant passage 21 , one end of each refrigerant passage 21 communicates with the lower part of the accommodating cavity, and the other end communicates with the upper part of the accommodating cavity. When the heat exchanger is used as an evaporator, the first pipeline 11 can be a refrigerant inlet pipe. When the heat exchanger is used as an evaporator, the refrigerant in the form of a gas-liquid mixture can enter the heat exchanger through the first pipeline 11 , and the saturated vapor can rise directly in the accommodating cavity to exchange heat with the refrigerant or air outside the refrigerant cavity 10 , the refrigerant in the heat exchange part 20 absorbs heat and vaporizes, rises and converges, and is discharged from the heat exchange part 20 through the second pipeline 12 , which can improve energy efficiency.

In some preferred embodiments of the present invention, the heat exchanger further includes a gas-liquid spacing structure 16, which is arranged in the accommodating cavity to divide the accommodating cavity into an upper cavity and a lower cavity, and the gas-liquid spacing structure 16 has at least one communication upper cavity and the communication hole of the lower cavity. The second end of the first pipeline 11 communicates with the lower chamber. The second end of the second pipeline 12 communicates with the upper cavity. The gas-liquid spacer structure 16 can be a spacer plate, and the spacer plate is provided with a communication hole. Optionally, the gas-liquid spacing structure 16 can also be formed by protrusions extending from the wall of the accommodating cavity, and communication holes are provided between the protrusions or on the protrusions. The arrangement of the gas-liquid spacing structure 16 can ventilate through the communication holes, block the refrigerant liquid, and further improve the heat exchange performance.

In some embodiments of the present invention, the refrigerant cavity 10 is located at the central position of the heat exchange part 20, so that the structure of the heat exchanger is compact, the volume is small, and the processing is convenient. For example, the refrigerant passages 21 are plural and extend along the axial direction of the accommodating cavity. The plurality of refrigerant passages 21 are located in the circumferential direction of the heat exchange portion 20 . Specifically, in some embodiments, the heat exchange part 20 further includes at least one or more heat exchange cylinders arranged coaxially, and one or more refrigerant channels 21 are provided on the cylinder wall of each heat exchange cylinder. Or, in other embodiments, the heat exchange part 20 further includes a plurality of heat exchange plates, which are arranged on the outer side of the refrigerant cavity 10 at intervals along the circumferential direction of the refrigerant cavity 10, and each heat exchange plate is provided with a One or more refrigerant passages 21 . Or, in some other embodiments, the heat exchange part 20 further includes a plurality of vertically arranged heat exchange tubes, and each heat exchange tube is a refrigerant channel 21 .

The heat exchanger also includes a plurality of first branches and a plurality of second branches. Each first branch communicates with the lower part of the accommodating cavity, and each first branch is connected to the lower end 211 of one or more refrigerant passages 21 . Each second branch communicates with the upper part of the accommodating cavity, and each second branch is connected to the upper end 212 of one or more refrigerant passages 21 .

In some embodiments of the present invention, the lower end of the accommodating cavity is provided with a first cavity 31 that communicates with each refrigerant channel 21 , and the upper surface of the first cavity 31 is provided with a first communication port 32 that communicates with the accommodating cavity. The first communication port 32 may be at a central position of the upper surface of the first cavity 31 . Specifically, each first branch is communicated with the first cavity 31 to better separate gas and liquid, facilitate the flow of refrigerant, and improve energy efficiency.

In some embodiments of the present invention, the upper end of the accommodating cavity is provided with a second cavity 33 communicating with each refrigerant channel 21 , and the lower surface of the second cavity 33 is provided with a second communication port 34 communicating with the accommodating cavity. Specifically, each second branch is communicated with the second cavity 33 . Preferably, the second end of the second pipeline 12 is communicated with the second cavity 33, so as to better separate the gas and liquid, facilitate the flow of the refrigerant, and improve energy efficiency.

In some embodiments of the present invention, the heat exchanger further includes a housing 40 . The heat exchange part 20 and the refrigerant cavity 10 are disposed in the casing 40 , and air flows inside the casing 40 to improve the heat exchange efficiency of the heat exchange part 20 . Preferably, the shell 40 is a heat-conducting shell 40, which can be used for radiative heat exchange. Convective heat exchange can be used inside the heat-conducting shell 40. The heat-conducting shell 40 bears a part of the heating or cooling load, and can ensure the heating or cooling capacity. On the premise, the wind blowing feeling of the human body is reduced and the thermal comfort of the human body is increased; especially in winter heating, the radiant heat transfer can significantly increase the thermal comfort of the human body.

In some embodiments of the present invention, the heat exchange part 20 is a one-piece processed part, and is formed by an extrusion process. In other embodiments of the present invention, the heat exchange portion 20 and the refrigerant cavity 10 are formed as a whole as a one-piece processed piece, and are formed by an extrusion process. In still other embodiments of the present invention, the heat exchanger is a one-piece workpiece and is formed by an extrusion process. Part or all of the components of the heat exchanger are integrally extruded, that is, integral molding, and the structure of the heat exchanger can optimize the airflow organization of the heat exchanger, and the refrigerant channels 21 can be large-spaced air channels. It improves the strength of convection heat transfer, reduces the local resistance of refrigerant pipes such as elbows, improves the heat transfer coefficient, and realizes the purpose of reducing production costs, reducing production processes (integrated extrusion, integrated molding), and reducing occupied space. Promote the improvement of air-conditioning energy efficiency.

The inner diameter of the first conduit 11 is smaller than the inner diameter of the second conduit 12 . When the heat exchanger of the embodiment of the present invention is working, the heat exchanger acts as an indoor heat exchanger. During cooling, the gas-liquid two-phase refrigerant enters the accommodating cavity of the heat exchanger from the first pipeline 11 at the axial center, and then passes through the heat exchanger. The first cavity 31 and the plurality of first branch paths are branched to each refrigerant channel 21. As the refrigerant absorbs heat and evaporates in the refrigerant channel 21, the refrigerant then enters the second branch and the second cavity 33, and finally enters the second branch. The second line 12 flows out of the heat exchanger and enters the compressor. At least part of the gaseous refrigerant in the accommodating cavity can directly enter the second cavity 33 upward, and the liquid refrigerant in the refrigerant from the second branch can also fall downward into the accommodating cavity. During heating, the high-temperature gaseous refrigerant enters the heat exchanger through the second pipeline 12, and flows to the heat exchange part 20 at the top of the heat exchanger. part.

The embodiment of the present invention also provides an air conditioner, which may include a compressor, a condenser, a throttling device and an evaporator. The evaporator and/or the condenser uses the heat exchanger in any of the above embodiments. Preferably, only the evaporator uses the heat exchanger of any of the above embodiments. Further, a fan may be provided at one end of the shell 40 of the heat exchanger, so that air enters the inner side of the shell 40 to exchange heat with the heat exchange part 20 .

By now, those skilled in the art will recognize that although various exemplary embodiments of the present invention have been shown and described in detail herein, without departing from the spirit and scope of the present invention, Numerous other variations or modifications consistent with the principles of the present invention are directly identified or derived from the disclosure of the present invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (10)

1. A heat exchanger, comprising:

the refrigerant cavity is internally limited with an accommodating cavity;

the first pipeline is provided with a first end positioned outside the refrigerant cavity and a second end positioned at the lower part of the accommodating cavity;

the second pipeline is provided with a first end positioned outside the refrigerant cavity and a second end positioned at the upper part of the accommodating cavity; and

the heat exchanging part is arranged outside the refrigerant cavity and is provided with at least one refrigerant channel, one end of each refrigerant channel is communicated with the lower part of the accommodating cavity, and the other end of each refrigerant channel is communicated with the upper part of the accommodating cavity.

2. The heat exchanger of claim 1, further comprising:

the gas-liquid separation structure is arranged in the accommodating cavity and divides the accommodating cavity into an upper cavity and a lower cavity, and the gas-liquid separation structure is provided with at least one communication hole for communicating the upper cavity with the lower cavity;

the second end of the first pipeline is communicated with the lower cavity;

and the second end of the second pipeline is communicated with the upper cavity.

3. The heat exchanger of claim 1,

the refrigerant cavity is located at the central position of the heat exchanging part.

4. The heat exchanger of claim 1,

the lower extreme that holds the chamber is provided with every the first cavity of refrigerant passageway intercommunication, the upper surface of first cavity is provided with the intercommunication hold the first opening in chamber.

5. The heat exchanger of claim 1,

the upper end of the accommodating cavity is provided with a second cavity communicated with each refrigerant channel, and the lower surface of the second cavity is provided with a second communication port communicated with the accommodating cavity;

and the second end of the second pipeline is communicated with the second cavity.

6. The heat exchanger of claim 1, further comprising a plurality of first branches and a plurality of second branches;

the plurality of refrigerant channels extend along the axial direction of the accommodating cavity;

each first branch is communicated with the lower part of the containing cavity and is connected with the lower ends of one or more refrigerant channels;

each second branch is communicated with the upper part of the accommodating cavity, and each second branch is connected with the upper end of one or more refrigerant channels.

7. The heat exchanger of claim 3, further comprising a housing;

the heat exchanging part and the refrigerant cavity are arranged in the shell;

the shell is a heat-conducting shell.

8. The heat exchanger of claim 3,

the heat exchanging part also comprises at least one or more heat exchanging cylinders which are coaxially arranged, and the cylinder wall of each heat exchanging cylinder is provided with one or more refrigerant channels; or the like, or, alternatively,

the heat exchanging part further comprises a plurality of heat exchanging plates, the heat exchanging plates are sequentially arranged on the outer side of the refrigerant cavity at intervals along the circumferential direction of the refrigerant cavity, and one or more refrigerant channels are arranged on each heat exchanging plate.

9. The heat exchanger of claim 1,

the heat exchanging part is an integrated workpiece and is formed by adopting an extrusion process; or the like, or, alternatively,

the heat exchanging part and the refrigerant cavity form an integral workpiece, and the integral workpiece is formed by adopting an extrusion process; or the like, or, alternatively,

the heat exchanger is an integrated workpiece and is formed by adopting an extrusion process.

10. An air conditioner comprises an evaporator and a condenser, and is characterized in that,

the evaporator and/or the condenser using the heat exchanger of any one of claims 1 to 9.

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