Heat exchange structure, condenser and air conditioner

Abstract

The application discloses a heat exchange structure, a condenser and an air conditioner. The heat exchange structure comprises a heat exchange pipe assembly arranged below a condenser air inlet and used for exchanging heat with gaseous refrigerant entering from the air inlet; and a liquid taking assembly connected with the heat exchange pipe assembly and the inside of the condenser and used for sending the liquid refrigerant condensed in the condenser into the heat exchange pipe assembly. The heat exchange structure provided by the application introduces the liquid refrigerant condensed in the condenser into the heat exchange pipe assembly, and the gaseous refrigerant entering from the air inlet exchanges heat with the liquid refrigerant in the heat exchange pipe assembly, so that the superheat of the gaseous refrigerant is reduced. The liquid refrigerant in the heat exchange pipe assembly is compressed into the next heat exchange stage after heat exchange and flows into the compressor from the suction pipeline connected with the compressor. Therefore, the heat exchange structure provided by the application does not need to change the original system structure of the condenser, can reduce the superheat of the gaseous refrigerant, and thus improves the heat exchange efficiency of the condenser.

Description

Technical Field

[0001] This invention relates to the field of refrigeration technology, and in particular to a heat exchange structure, a condenser, and an air conditioner. Background Technology

[0002] In the refrigeration cycle system of a chiller, when the high-temperature, high-pressure gaseous refrigerant discharged from the compressor enters the condenser inlet, the gaseous refrigerant is in a superheated state. When the superheated gaseous refrigerant undergoes a phase change, there exists a transition temperature (related to the saturation temperature and the cold wall temperature). When the temperature of the superheated gaseous refrigerant is higher than the transition temperature, it releases sensible heat without undergoing a phase change. When the temperature of the superheated gaseous refrigerant is lower than the transition temperature, it releases latent heat and condenses.

[0003] Therefore, it can be seen that the gaseous refrigerant entering the condenser is in a superheated state, so there must be a heat exchange area at the top of the condenser that does not undergo phase change. As a result, the heat exchange area in the condenser is not fully utilized efficiently, thus reducing the heat exchange efficiency of the condenser. Summary of the Invention

[0004] In order to solve the technical problem of low heat exchange efficiency of condensers in the prior art, the present invention proposes a heat exchange structure, a condenser, and an air conditioner.

[0005] The technical solution adopted in this invention is:

[0006] This invention proposes a heat exchange structure, a condenser, and an air conditioner, wherein the heat exchange structure includes:

[0007] A heat exchange tube assembly is disposed below the condenser inlet and exchanges heat with the gaseous refrigerant entering from the inlet.

[0008] The liquid intake assembly connects the heat exchange tube assembly and the interior of the condenser, and delivers the condensed liquid refrigerant from the condenser into the interior of the heat exchange tube assembly.

[0009] Furthermore, the outlet of the heat exchange tube assembly is connected to the compressor's suction line.

[0010] In one embodiment, the liquid sampling assembly includes a liquid sampling pipe connecting the inlet of the heat exchange tube assembly and the interior of the condenser, and a throttling orifice plate disposed on the liquid sampling pipe.

[0011] In one embodiment, the heat exchange tube assembly includes a plurality of first heat exchange tubes connected in sequence, wherein the axial direction of the first heat exchange tubes is perpendicular to the flow direction of the gaseous refrigerant entering from the air inlet.

[0012] The condenser includes the heat exchange structure described above.

[0013] Furthermore, the condenser includes a housing, with an air inlet at the top and a liquid outlet and a liquid intake at the bottom. The liquid intake pipe is connected to the liquid intake, and a condenser tube assembly is located below the heat exchange tube assembly.

[0014] Furthermore, an anti-impact plate is provided between the air inlet and the heat exchange tube assembly.

[0015] Furthermore, a porous baffle is provided between the heat exchange tube assembly and the condenser tube assembly to separate the gaseous refrigerant and the liquid refrigerant.

[0016] In one embodiment, the porous baffle includes an equalizing section and a guiding section. The equalizing section has multiple openings, and the guiding section is bent downward. The guiding section is fixed to the inner wall of the housing, and a gap is left between the guiding section and the inner wall of the housing.

[0017] In one embodiment, the condenser tube assembly includes a plurality of horizontally arranged and sequentially connected second heat exchange tubes, the axial direction of which is perpendicular to the flow direction of the gaseous refrigerant entering from the air inlet.

[0018] Air conditioners, including the condenser mentioned above.

[0019] Compared with existing technologies, the heat exchange structure proposed in this invention introduces the condensed liquid refrigerant into the heat exchange tube assembly. Subsequently, the gaseous refrigerant entering from the inlet exchanges heat with the liquid refrigerant inside the heat exchange tube assembly, thereby reducing the superheat of the gaseous refrigerant. The gaseous refrigerant with reduced superheat then exchanges heat with the condenser tube assembly in the condenser. The liquid refrigerant in the heat exchange tube assembly, after heat exchange, flows back into the compressor through the suction line connected to the compressor for compression and enters the next heat exchange stage. Therefore, the heat exchange structure proposed in this invention does not require changes to the original system structure of the condenser itself, and can reduce the superheat of the gaseous refrigerant, thereby improving the heat exchange efficiency of the condenser. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the condenser and heat exchange structure in an embodiment of the present invention;

[0022] Figure 2 This is a three-dimensional structural diagram of the porous baffle in an embodiment of the present invention;

[0023] Figure 3This is a side view schematic diagram of the perforated baffle in an embodiment of the present invention;

[0024] 1. Heat exchanger tube assembly; 2. Liquid intake tube; 3. Orifice plate; 4. Shell; 5. Air inlet; 6. Anti-impact plate; 7. Perforated baffle; 71. Drainage section; 72. Gas equalization section; 8. Condenser tube assembly. Detailed Implementation

[0025] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0026] In the refrigeration cycle system of a chiller, when the high-temperature, high-pressure gaseous refrigerant discharged from the compressor enters the condenser inlet, the gaseous refrigerant is in a superheated state. When the superheated gaseous refrigerant undergoes a phase change, there exists a transition temperature (related to the saturation temperature and the cold wall temperature). When the temperature of the superheated gaseous refrigerant is higher than the transition temperature, it releases sensible heat without undergoing a phase change. When the temperature of the superheated gaseous refrigerant is lower than the transition temperature, it releases latent heat and condenses.

[0027] Therefore, it can be seen that the gaseous refrigerant entering the condenser is in a superheated state, so there must be a heat exchange area at the top of the condenser that does not undergo phase change. As a result, the heat exchange area in the condenser is not fully utilized efficiently, thus reducing the heat exchange efficiency of the condenser.

[0028] Therefore, in order to solve the technical problem of low heat exchange efficiency in existing condensers due to the refrigerant being in an overheated state, this invention proposes a heat exchange structure, including:

[0029] The heat exchange tube assembly is located below the condenser inlet and exchanges heat with the gaseous refrigerant entering from the inlet.

[0030] The liquid intake assembly connects the heat exchange tube assembly and the inside of the condenser, and sends the condensed liquid refrigerant inside the condenser into the inside of the heat exchange tube assembly.

[0031] Therefore, the heat exchange structure proposed in this invention introduces the condensed liquid refrigerant into the heat exchange tube assembly. Subsequently, the gaseous refrigerant entering from the inlet exchanges heat with the liquid refrigerant inside the heat exchange tube assembly, thereby reducing the superheat of the gaseous refrigerant. The gaseous refrigerant with reduced superheat then exchanges heat with the condenser tube assembly in the condenser. The liquid refrigerant in the heat exchange tube assembly, after heat exchange, flows back into the compressor through the suction line connected to the compressor for compression and enters the next heat exchange stage. Therefore, the heat exchange structure proposed in this invention does not require changes to the original system structure of the condenser and can reduce the superheat of the gaseous refrigerant, thereby improving the heat exchange efficiency of the condenser.

[0032] The principles and structure of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0033] In this embodiment, as Figure 1 As shown, the heat exchange structure includes: a heat exchange tube assembly 1 disposed inside the condenser and located below the condenser inlet; and a liquid receiving assembly that delivers liquid refrigerant from inside the condenser into the heat exchange tube assembly. The liquid receiving assembly includes: a liquid receiving pipe 2 connecting the inlet of the heat exchange tube assembly 1 and the bottom of the condenser; and a throttling orifice plate 3 disposed on the liquid receiving pipe 2. Simultaneously, the outlet of the heat exchange tube assembly 1 is connected to a low-pressure refrigerant pipeline, and the low-pressure refrigerant passage is connected to the compressor's suction port.

[0034] Specifically, in this embodiment, the heat exchange tube assembly includes multiple first heat exchange tubes connected in sequence, with the axial direction of the first heat exchange tubes perpendicular to the flow direction of the gaseous refrigerant entering from the inlet. Therefore, when the heat exchange structure is working, the high-pressure liquid refrigerant at the bottom of the condenser becomes low-pressure liquid refrigerant after being throttled by the orifice plate, and then flows into the heat exchange tube assembly from the liquid outlet under the action of the pressure difference. At this time, the superheated gaseous refrigerant entering from the inlet will exchange heat with the low-pressure liquid refrigerant in the heat exchange tube assembly. After the heat exchange, the superheat of the superheated gaseous refrigerant is reduced, while the low-pressure liquid refrigerant in the heat exchange tube assembly becomes low-pressure gaseous refrigerant and is compressed by the compressor before entering the next heat exchange stage. In addition, the orifice plate can further reduce the temperature of the liquid refrigerant, so the temperature difference between the liquid refrigerant after throttling by the orifice plate and the gaseous refrigerant entering from the inlet will be greater, thereby further improving the superheat removal effect of the heat exchange structure.

[0035] Therefore, the heat exchange structure proposed in this invention utilizes a small amount of liquid refrigerant after heat exchange inside the condenser to exchange heat with the superheated gaseous refrigerant, thereby reducing the superheat of the gaseous refrigerant. Furthermore, the liquid refrigerant after heat exchange with the gaseous refrigerant will enter the next heat exchange stage. Therefore, the setting of this heat exchange structure does not require changing the original system structure of the condenser. It is only necessary to simply add this heat exchange structure and introduce a portion of the liquid refrigerant after heat exchange into the condenser to reduce the superheat of the gaseous refrigerant, thereby improving the heat exchange efficiency of the condenser.

[0036] The present invention also proposes a condenser comprising the heat exchange structure described above.

[0037] Specifically, the condenser includes a shell 4, with an air inlet 5 at the top and a liquid outlet and a liquid intake port at the bottom. The liquid intake port is connected to the liquid intake pipe 2 in the heat exchange structure, and the liquid outlet is connected to the evaporator. The heat exchange tube assembly 1 in the heat exchange structure is located directly below the air inlet 5, and a condenser tube assembly 8 is located below the heat exchange tube assembly 1. In this embodiment, the condenser tube assembly includes multiple second heat exchange tubes connected in sequence, with the axial direction of the second heat exchange tubes perpendicular to the flow direction of the gaseous refrigerant.

[0038] Therefore, the high-temperature gaseous refrigerant entering from the condenser inlet first exchanges heat with the heat exchange structure to reduce its superheat, and then exchanges heat with the condenser tube assembly. Because the superheated high-temperature gaseous refrigerant's superheat is reduced after passing through the heat exchange structure, it becomes saturated gaseous refrigerant. When this saturated gaseous refrigerant exchanges heat with the condenser tube assembly, a phase change occurs, significantly improving the condenser's heat exchange efficiency.

[0039] Furthermore, in order to prevent the gaseous refrigerant from directly scouring the first heat exchange tube when it enters from the air inlet, thereby causing the first heat exchange tube to vibrate and become unstable or corroded, the condenser proposed in this invention is also provided with an anti-scouring plate 6 between the air inlet and the heat exchange tube assembly.

[0040] Furthermore, considering that a small portion of the gaseous refrigerant may transform into liquid refrigerant during heat exchange with the heat exchange structure, a porous baffle 7 is provided between the heat exchange tube assembly and the condenser tube assembly to separate the gaseous and liquid refrigerant. Further, this porous baffle 7 includes a flow guide 71 that guides liquid refrigerant from the inner wall of the shell into the bottom of the condenser, and a gas equalization section 72 that evenly introduces gaseous refrigerant into the lower condenser tube assembly. The gas equalization section is located in the center of the porous baffle, and the flow guide section is located at the edge of the porous baffle and surrounds the gas equalization section. Specifically, as shown... Figure 2 and Figure 3 As shown, the edge of the porous baffle is bent downwards to form a flow guide 71, which has no openings. The flow guide 71 is fixedly connected to the inner wall of the shell 4, and there is a gap between the flow guide and the inner wall of the shell. Under the action of gravity, the liquid refrigerant slides down along the flow guide and then slides down the inner wall of the shell into the bottom of the shell. This avoids the liquid refrigerant from contacting the condenser tube assembly, thereby increasing the heat exchange area between the gaseous refrigerant and the condenser tube assembly. The gas equalization section 72 is slightly inclined towards the flow guide to facilitate the flow of liquid refrigerant to the flow guide. The gas equalization section 72 has multiple openings, through which the gaseous refrigerant flows evenly to the condenser tube assembly. Therefore, the gas equalization section can make the gaseous refrigerant exchange heat evenly with the condenser tube assembly in all directions. At the same time, the gas equalization section can also play a role in preventing the gaseous refrigerant from directly scouring the condenser tube assembly.

[0041] Specifically, the perforated baffle can be in the form of an inverted V-shape, an inverted U-shape, or a multi-folded edge structure.

[0042] In summary, the superheated gaseous refrigerant entering from the inlet first exchanges heat with the heat exchange tube assembly, reducing its superheat. The reduced-superheat gaseous refrigerant then exchanges heat fully with the condenser tube assembly. Most of the liquid refrigerant after heat exchange with the condenser tube assembly enters the evaporator from the outlet, while a small portion enters the heat exchange tube assembly under the action of the throttling component. The liquid refrigerant in the heat exchange tube assembly absorbs heat, turns into gaseous refrigerant, and then flows into the compressor for compression, entering the next heat exchange stage. Therefore, this invention proposes that the condenser can reduce the superheat of the gaseous refrigerant by adding a heat exchange structure without changing the original system structure, thereby improving heat exchange efficiency.

[0043] The present invention also proposes an air conditioner comprising the condenser described above.

[0044] It should be noted that the terminology used above is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0045] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0046] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0047] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0048] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A condenser, including a heat exchange structure, characterized in that, The heat exchange structure includes: A heat exchange tube assembly is disposed below the condenser inlet and exchanges heat with the gaseous refrigerant entering from the inlet. The outlet of the heat exchange tube assembly is connected to the compressor's suction line. The liquid receiving component includes an inlet connecting the heat exchange tube assembly and the inside of the condenser, which delivers the condensed liquid refrigerant inside the condenser into the heat exchange tube assembly. The condenser also includes a housing, with an air inlet at the top and a liquid outlet and a liquid intake at the bottom. The liquid intake pipe is connected to the liquid intake, and a condenser assembly is located below the heat exchange tube assembly. A porous baffle is provided between the heat exchange tube assembly and the condenser tube assembly to separate the gaseous refrigerant and the liquid refrigerant; The porous baffle includes an equalizing section and a guiding section. The equalizing section has multiple openings, and the guiding section is bent downward. The guiding section is fixed to the inner wall of the housing, and a gap is left between the guiding section and the inner wall of the housing.

2. The condenser as described in claim 1, characterized in that, The liquid extraction assembly includes a throttling orifice plate disposed on the liquid extraction tube.

3. The condenser as described in claim 1, characterized in that, The heat exchange tube assembly includes multiple first heat exchange tubes connected in sequence, with the axial direction of the first heat exchange tubes perpendicular to the flow direction of the gaseous refrigerant entering from the air inlet.

4. The condenser as described in claim 1, characterized in that, An anti-impact plate is provided between the air inlet and the heat exchange tube assembly.

5. The condenser as described in claim 1, characterized in that, The condenser tube assembly includes multiple horizontally arranged and sequentially connected second heat exchange tubes, the axial direction of which is perpendicular to the flow direction of the gaseous refrigerant entering from the air inlet.

6. An air conditioner, characterized in that, Includes the condenser according to any one of claims 1-5.

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