CN211177520U - Heat exchanger and air conditioner having the same - Google Patents

Abstract

The utility model relates to a heat exchanger and have its air conditioner. The utility model provides a heat exchanger includes: a liquid separation main pipe, which is internally provided with a gas-liquid separation channel extending along the length direction; a heat exchanging part having a plurality of refrigerant channels; one end of each refrigerant channel is communicated with the gas-liquid separation channel; the refrigerant channels are connected with the gas-liquid separation channel at least two positions in the axial direction of the gas-liquid separation channel; and one end of the connecting pipeline is connected to one end of the gas-liquid separation channel, and the other end of each refrigerant channel is communicated with one end of the connecting pipeline, which is connected to the gas-liquid separation channel. The utility model also provides an air conditioner of having above-mentioned 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 gas-liquid separation main pipe, which defines a gas-liquid separation channel extending along its length direction;

a heat exchange part, the heat exchange part has a plurality of refrigerant passages; one end of each refrigerant passage is connected to the gas-liquid separation passage; and the plurality of refrigerant passages are in the axial direction of the gas-liquid separation passage At least two parts of the gas-liquid separation channel are connected; and

One end of the connecting pipeline is connected to one end of the gas-liquid separation channel, and the other end of each refrigerant channel is communicated with one end of the connecting pipeline connected to the gas-liquid separation channel.

Optionally, the heat exchanger further includes one or more gas-liquid spacer structures spaced along the axial direction of the gas-liquid separation channel, arranged in the gas-liquid separation channel, and each of the gas-liquid separation channels. The liquid separation structure has at least one communication hole that communicates with both sides of the gas-liquid separation structure.

Optionally, a plurality of the refrigerant passages are arranged in multiple groups, each group of the refrigerant passages has at least one of the refrigerant passages, and the diameters of the refrigerant passages in each group are equal;

The first direction is from one end of the gas-liquid separation channel connected to the connecting pipeline to the other end of the gas-liquid separation channel;

The ends of the plurality of groups of the refrigerant passages connected to the gas-liquid separation passages are arranged in sequence along the first direction, and among the plurality of groups of the refrigerant passages in which the ends are arranged in sequence along the first direction, the refrigerant The diameter of the channel increases sequentially.

Optionally, a communication port is provided between the connection pipeline and the gas-liquid separation channel, and the diameter of the communication port is smaller than the diameter of the connection pipeline.

Optionally, each of the refrigerant channels includes:

a straight channel section extending in the axial direction of the gas-liquid separation channel; and

A connecting channel segment connects the gas-liquid separation channel and one end of the straight channel segment.

Optionally, a plurality of the straight channel sections are arranged outside the gas-liquid separation channel, so that the gas-liquid separation main pipe is located at a central position of the heat exchange part.

Optionally, the heat exchanger further includes a plurality of branches, each of which is connected to one end of the connecting pipeline that is connected to the gas-liquid separation channel; each branch is connected to one or more a plurality of the refrigerant passages.

Optionally, the heat exchanger further includes a shell; the heat exchange part and the gas-liquid separation main pipe are arranged in the shell; the shell is a heat conduction shell; the heat exchange part has a plurality of Channel tubes, each of the channel tubes is one of the refrigerant channels.

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

The heat exchange part and the gas-liquid separation main pipe are integrally formed as a whole, and are formed by extrusion process;

Or, the heat exchanger is an integral piece, and is formed by 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 utility model, because of the gas-liquid separation main pipe, the special connection relationship between the gas-liquid separation main pipe and the heat exchange part, when the heat exchanger is used as an evaporator, the gas-liquid mixture can enter the heat After the exchanger, the saturated vapor can rise directly in the gas-liquid separation channel, and exchange heat with the refrigerant or air outside the gas-liquid separation main pipe. 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, in the heat exchanger of the present invention, the inner flow channel of the heat exchange part and the gas-liquid separation main pipe can form an approximate leaf vein structure, that is, a flow channel structure with a bionic leaf vein is formed, and a small pressure loss in the flow direction of the refrigerant liquid is realized. Enhance turbulent heat transfer. Further, the gas-liquid partition is intermittently partitioned, which takes into account gas-liquid separation, turbulent heat exchange, and pressure loss reduction. Along the flow direction, the diameter of the leaf vein gradually decreases, and the air duct gradually increases, which is conducive to the output of air and cooling capacity. users, which is beneficial to the energy saving of fans.

Further, the inventor of the present utility model also found that: the existing tube-fin evaporators have large volume, high cost, and complicated production process, and the local resistance of refrigerant pipelines such as elbows is large, which affects the heat exchange performance. 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 gas-liquid separation main pipe 10 , a connecting pipeline 11 and a heat exchange part 20 . The gas-liquid separation main pipe 10 defines a gas-liquid separation channel extending along its length direction. The heat exchange part 20 has a plurality of refrigerant passages. One end of each refrigerant passage is communicated with the gas-liquid separation passage. And the plurality of refrigerant passages are connected with the gas-liquid separation passage at at least two positions in the axial direction of the gas-liquid separation passage. That is, a refrigerant channel is respectively extended or provided at a plurality of locations in the axial direction of the gas-liquid separation channel. Further, in order to facilitate the arrangement and layout of the refrigerant passages, a plurality of refrigerant passages are connected to the gas-liquid separation passage at multiple locations in the circumferential direction of the gas-liquid separation passage. For example, by setting the gas-liquid separation main pipe 10 at the central position of the heat exchange part 20, the structure of the heat exchanger can be compact, the volume can be small, and the processing can be facilitated. One end of the connecting pipeline 11 is connected to one end of the gas-liquid separation channel, and the other end of each refrigerant channel is connected to one end of the connecting pipeline 11 connected to the gas-liquid separation channel.

When the heat exchanger is used as an evaporator, the end of the gas-liquid separation channel away from the connecting pipeline 11 can be a refrigerant inlet. When the heat exchanger is used as an evaporator, after the refrigerant in the form of gas-liquid mixture enters the heat exchanger, the saturated vapor can rise directly in the gas-liquid separation channel, and exchange heat with the refrigerant or air outside the gas-liquid separation main pipe 10. The refrigerant in 20 absorbs heat and vaporizes, rises and converges, and is discharged from the heat exchange part 20 through the connecting pipeline 11, which can improve energy efficiency.

In some preferred embodiments of the present invention, the heat exchanger further includes a gas-liquid spacer structure 30 disposed in the gas-liquid separation channel, and the gas-liquid spacer structure 30 has at least one communication hole connecting both sides thereof. The gas-liquid spacer structure 30 may be a spacer plate, and the spacer plate is provided with communication holes. Optionally, the gas-liquid spacing structure 30 can also be formed by protrusions extending from the wall of the gas-liquid separation channel, and communication holes are provided between the protrusions or on the protrusions. The arrangement of the gas-liquid spacing structure 30 can ventilate through the communication holes, block the refrigerant liquid, and further improve the heat exchange performance. Preferably, there may be a plurality of gas-liquid spacing structures 30, which are spaced along the axial direction of the gas-liquid separation channel. For example, in the embodiment shown in FIG. 1, there may be two gas-liquid spacing structures 30.

In some embodiments of the present invention, each refrigerant channel may include a straight channel section 21 and a connecting channel section 22 . The straight channel section 21 extends in the axial direction of the gas-liquid separation channel. The connecting channel section 22 connects the gas-liquid separation channel and one end of the straight channel section 21 . A plurality of straight channel sections 21 are arranged outside the gas-liquid separation channel. The heat exchanger also includes a plurality of branch circuits 23, and each branch circuit 23 is connected to one end of the connecting pipeline 11 that is connected to the gas-liquid separation channel. One or more refrigerant channels are connected to each branch 23 . Each refrigerant channel and gas-liquid separation channel can form an approximate leaf vein structure, that is, a bionic flow channel structure of the leaf vein is formed, which realizes a small pressure loss split in the flow direction of the refrigerant liquid and strengthens turbulent heat transfer. The connecting channel section 22 may first extend from the gas-liquid separation channel to the connecting pipeline 11 , and then extend to the corresponding straight channel section 21 . The extension paths of the plurality of connecting channel segments 22 may not be consistent.

Specifically, in some embodiments, the heat exchange part 20 has a plurality of channel tubes, and each channel tube is a refrigerant channel. 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 gas-liquid separation main pipe 10 at intervals along the circumferential direction of the gas-liquid separation main pipe 10, and each heat exchange plate is provided with a Multiple refrigerant channels.

In some preferred embodiments of the present invention, the plurality of refrigerant passages are arranged into multiple groups, each group of refrigerant passages has at least one refrigerant passage, and the diameters of each group of refrigerant passages are equal. The first direction is directed from one end of the gas-liquid separation channel connected to the connecting pipeline 11 to the other end of the gas-liquid separation channel. The ends of the plurality of refrigerant passages connected to the gas-liquid separation passage are arranged in sequence along the first direction, and among the plurality of refrigerant passages whose ends are arranged in sequence along the first direction, the diameters of the refrigerant passages increase sequentially. For example, the refrigerant passages are divided into a plurality of groups with the gas-liquid spacer structure 30 as a dividing line. In some alternative embodiments, each refrigerant channel is a group.

Each refrigerant channel and gas-liquid separation channel can form an approximate leaf vein structure, that is, a bionic flow channel structure of the leaf vein is formed, which realizes a small pressure loss shunting in the flow direction of the refrigerant liquid and strengthens turbulent heat transfer. The gas-liquid partition is intermittently separated, taking into account gas-liquid separation, turbulent heat exchange, and pressure loss reduction. Along the flow direction, the diameter of the leaf vein gradually decreases, and the air duct gradually increases, which is beneficial to the output of air volume and cooling to the user, which is beneficial to the user. Fan saves energy.

In some embodiments of the present invention, the diameter of the gas-liquid separation channel is larger than the diameter of the refrigerant channel. There is a communication port 12 between the connecting pipe 11 and the gas-liquid separation channel, and the diameter of the communication port 12 is smaller than the diameter of the connecting pipe 11 . Specifically, the end of the gas-liquid separation channel connected to the connecting pipeline 11 is provided with a conical groove, and the above-mentioned communication port 12 is provided in the center of the conical groove, so as to better perform gas-liquid separation, facilitate the flow of 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 gas-liquid separation main pipe 10 are provided in the casing 40 , and the 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, 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, which can be used on the premise of ensuring the heating or cooling capacity. It can reduce the blowing feeling of the human body and increase the thermal comfort of the human body. 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 gas-liquid separation main pipe 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. The strength of convection heat transfer is improved, the local resistance of refrigerant pipes such as elbows is reduced, the heat transfer coefficient is improved, and the purpose of reducing production costs, reducing production processes (integrated extrusion, integrated molding), and reducing occupied space is realized. Improved air conditioning energy efficiency.

When the heat exchanger of the embodiment of the present invention is in operation, the heat exchanger acts as an indoor heat exchanger. During refrigeration, the gas-liquid two-phase refrigerant enters the gas-liquid phase of the heat exchanger from the end of the gas-liquid separation channel away from the connecting pipeline 11 . The separation channel is then radially branched to each straight channel section 21 through the connecting channel section 22. As the refrigerant absorbs heat and evaporates in the connecting channel section 22 and the straight channel section 21, the refrigerant enters the branch 23 and the connecting pipeline 11 flows out. heat exchanger, into the compressor. At least part of the gaseous refrigerant in the gas-liquid separation channel can directly enter the connecting pipeline 11 upward, and the liquid refrigerant in the refrigerant from the branch 23 can also fall down into the gas-liquid separation channel. During heating, the high-temperature gaseous refrigerant enters the heat exchanger through the connecting pipe 11, and flows to the heat exchange part 20 at the top of the heat exchanger. Downstream throttling device and other components.

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, characterized in that, comprising: a gas-liquid separation main pipe, which defines a gas-liquid separation channel extending along its length direction; a heat exchange part, the heat exchange part has a plurality of refrigerant passages; one end of each refrigerant passage is connected to the gas-liquid separation passage; and the plurality of refrigerant passages are in the axial direction of the gas-liquid separation passage At least two parts of the gas-liquid separation channel are connected; and One end of the connecting pipeline is connected to one end of the gas-liquid separation channel, and the other end of each refrigerant channel is communicated with one end of the connecting pipeline connected to the gas-liquid separation channel. 2. The heat exchanger of claim 1, further comprising: One or more gas-liquid separation structures spaced along the axial direction of the gas-liquid separation channel are arranged in the gas-liquid separation channel, and each of the gas-liquid separation structures has at least one communication with the gas-liquid separation channel. Communication holes on both sides of the liquid spacer structure. 3. The heat exchanger of claim 1, wherein: A plurality of the refrigerant passages are arranged into groups, each group of the refrigerant passages has at least one of the refrigerant passages, and the diameters of the refrigerant passages in each group are equal; The first direction is from one end of the gas-liquid separation channel connected to the connecting pipeline to the other end of the gas-liquid separation channel; The ends of the plurality of groups of the refrigerant passages connected to the gas-liquid separation passages are arranged in sequence along the first direction, and among the plurality of groups of the refrigerant passages in which the ends are arranged in sequence along the first direction, the refrigerant The diameter of the channel increases sequentially. 4. The heat exchanger of claim 1, wherein: A communication port is provided between the connection pipeline and the gas-liquid separation channel, and the diameter of the communication port is smaller than the diameter of the connection pipeline. 5. The heat exchanger of claim 1, wherein each of the refrigerant passages comprises: a straight channel section extending in the axial direction of the gas-liquid separation channel; and A connecting channel segment connects the gas-liquid separation channel and one end of the straight channel segment. 6. The heat exchanger of claim 1, wherein: The gas-liquid separation main pipe is located at the central position of the heat exchange part. 7. The heat exchanger of claim 1, further comprising: A plurality of branches, each of which is connected to one end of the connecting pipeline that is connected to the gas-liquid separation channel; and each branch is connected to one or more of the refrigerant channels. 8. The heat exchanger of claim 1, wherein: The heat exchange part has a plurality of channel tubes, and each of the channel tubes is one of the refrigerant channels. 9. The heat exchanger of claim 1, wherein: The heat exchange part is a one-piece processed part, and is formed by extrusion process; or, The heat exchange part and the gas-liquid separation main pipe are formed as an integral piece, which is formed by extrusion process; or, The heat exchanger is an integral piece, and is formed by extrusion process. 10. An air conditioner comprising an evaporator and a condenser, characterized in that, The evaporator and/the condenser adopts the heat exchanger described in claims 1 to 9.

Images