Outdoor heat exchanger and air conditioner

Abstract

The application provides an outdoor heat exchanger and an air conditioner. The outdoor heat exchanger comprises: a plurality of fins arranged side by side and at intervals; and a first refrigerant pipe arranged from bottom to top in sequence and used for flowing non-azeotropic refrigerant, the first refrigerant pipe being arranged through the plurality of fins; wherein when the outdoor heat exchanger is evaporated, the non-azeotropic refrigerant flows through the first refrigerant pipe from bottom to top. The refrigerant flows through the first refrigerant pipe in anti-gravity flow, reduces the flow rate, and restrains the floating tendency of the gaseous component, so that the gaseous component and the liquid component are re-mixed, the proportion change degree of the gaseous phase and the liquid phase components is reduced, the temperature fluctuation amplitude is reduced, and the frosting is improved.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to an outdoor heat exchanger and an air conditioner. Background Technology

[0002] Non-azeotropic refrigerants are refrigerants composed of two or more substances. Due to the different boiling points of their components, the lower-boiling-point components evaporate first and then cool, while the higher-boiling-point components evaporate later and cool first. This causes the ratio of gaseous to liquid components to continuously change during the phase change process. This component change causes the refrigerant temperature to fluctuate within a certain range during evaporation or condensation, a temperature range known as temperature glide. Therefore, under heating conditions, the temperature glide results in a larger heat exchange temperature difference in the evaporator inlet area, making frost formation more likely. Utility Model Content

[0003] This utility model provides an outdoor heat exchanger and an air conditioner to solve the technical problem of easy frosting under heating conditions.

[0004] To achieve the above objectives, the outdoor heat exchanger proposed in this application includes: Multiple fins arranged side-by-side and spaced apart; and, The first refrigerant pipe, arranged sequentially from bottom to top, is used to supply non-azeotropic refrigerant flow, and the first refrigerant pipe passes through multiple fins; When the outdoor heat exchanger is evaporating, the non-azeotropic refrigerant flows from bottom to top through the first refrigerant pipe.

[0005] Optionally, in one embodiment, the first refrigerant pipe includes at least two refrigerant sections arranged side by side, each of the refrigerant sections passing through a plurality of the fins, and two adjacent refrigerant sections communicating with each other. When the outdoor heat exchanger is evaporating, each of the refrigerant sections is used to allow non-azeotropic refrigerant to flow through from bottom to top.

[0006] Optionally, in one embodiment, a second refrigerant pipe is further included, the second refrigerant pipe connecting two adjacent refrigerant sections, the second refrigerant pipe connecting the upper end of one of the two adjacent refrigerant sections and the lower end of the other.

[0007] Optionally, in one embodiment, the refrigerant section is arranged in an S-shape.

[0008] Optionally, in one embodiment, the refrigerant section includes multiple straight pipe sections and multiple bends. The multiple straight pipe sections are arranged side by side along a direction perpendicular to the setting direction of the multiple refrigerant sections, and the bends are used to connect two adjacent straight pipe sections end to end.

[0009] Optionally, in one embodiment, under heating conditions, one end of the straight pipe section is higher than the other end of the straight pipe section along the refrigerant flow direction, or both ends of the straight pipe section are flush.

[0010] Optionally, in one embodiment, a fan is also included, wherein when the non-azeotropic refrigerant flows sequentially through the plurality of refrigerant sections along the first direction, the air outlet direction of the fan is opposite to the first direction.

[0011] Optionally, in one embodiment, multiple first refrigerant pipes are provided, and the multiple first refrigerant pipes are arranged vertically.

[0012] Optionally, in one embodiment, the system further includes a flute and a distributor, the flute being connected to the upper ends of a plurality of first refrigerant pipes, the distributor being connected to the lower ends of a plurality of first refrigerant pipes, and the flute being higher than the distributor.

[0013] This application also proposes an air conditioner, including an outdoor heat exchanger and an indoor heat exchanger as described above.

[0014] The outdoor heat exchanger provided in this application reduces the flow rate of the refrigerant by causing it to flow against gravity when passing through the first refrigerant pipe, and also suppresses the tendency of gaseous components to rise, thereby causing the gaseous components to remix with the liquid components, reducing the degree of change in the ratio of gaseous to liquid components, thus reducing the temperature fluctuation range and improving frosting. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, 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 this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the outdoor heat exchanger in this application.

[0017] Explanation of icon numbers: 1. Fins; 2. First refrigerant pipe; 21. Refrigerant section; 3. Second refrigerant pipe; 4. Flute-shaped pipe; 5. Distributor.

[0018] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model.

[0020] In the description of this application, it should be understood that the terms "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a unique orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0023] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not exclude the applicability to or configuration to devices performing additional tasks or steps. Additionally, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0024] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0025] In this application, from Figure 1 From the perspective of the viewpoint, the bends that can be directly seen are represented by solid lines, while the bends that cannot be seen are represented by dashed lines.

[0026] This application provides an outdoor heat exchanger to solve the problem of easy frosting during heating operation. The following description will be provided in conjunction with the accompanying drawings.

[0027] In the embodiments of this application, such as Figure 1 As shown, the outdoor heat exchanger includes: Multiple fins 1, arranged side by side and spaced apart; and, The first refrigerant pipe 2, arranged sequentially from bottom to top, is used to supply non-azeotropic refrigerant flow, and the first refrigerant pipe 2 passes through multiple fins 1; When the outdoor heat exchanger is evaporating, the non-azeotropic refrigerant flows from bottom to top through the first refrigerant pipe 2.

[0028] It should be noted that when the non-azeotropic refrigerant flows through the first refrigerant pipe 2, it flows from bottom to top, that is, it flows in the direction of anti-gravity.

[0029] Understandably, non-azeotropic refrigerants undergo phase changes sequentially, resulting in continuous changes in the ratio of gaseous to liquid components during these changes. This leads to temperature fluctuations within a certain range, particularly in the inlet area of ​​the outdoor heat exchanger under heating conditions, where temperature slippage causes a greater temperature difference. In heating mode, the outdoor heat exchanger acts as an evaporator, evaporating the refrigerant. By allowing the non-azeotropic refrigerant to flow against gravity during evaporation, the overall flow velocity of the refrigerant is slowed down. Furthermore, the denser, un-phase-changed liquid refrigerant inhibits the upward flow of the less tightly sealed gaseous refrigerant after the phase change, thus reducing the migration of both gaseous and liquid components. This mitigates the problem of lower-boiling-point components evaporating first, leading to excessively low temperatures in the inlet area of ​​the outdoor heat exchanger, and ultimately reduces frosting.

[0030] In addition, under refrigeration conditions, the refrigerant flows from top to bottom through multiple fins 1.

[0031] For example, a non-azeotropic refrigerant can specifically be a hydrocarbon refrigerant, which refers to a class of refrigerants whose main components are hydrocarbon compounds (containing only carbon and hydrogen elements).

[0032] In some embodiments, such as Figure 1 As shown, the first refrigerant pipe 2 includes at least two refrigerant sections 21 arranged side by side. Each refrigerant section 21 passes through multiple fins 1, and two adjacent refrigerant sections 21 are connected to each other. When the outdoor heat exchanger is evaporating, each refrigerant section 21 is used to supply non-azeotropic refrigerant to flow from bottom to top.

[0033] It should be noted that in each refrigerant section 21, the overall flow direction of the non-azeotropic refrigerant is from bottom to top.

[0034] Understandably, the refrigerant flow path can be extended by arranging the refrigerant sections 21 side by side, thereby improving the heat exchange effect of the refrigerant. When the outdoor heat exchanger is evaporating, the refrigerant flows from bottom to top in each refrigerant section 21, and from top to bottom when flowing from one refrigerant section 21 to another adjacent refrigerant section 21.

[0035] For example, multiple refrigerant sections 21 can be arranged side by side. The lower end of the leftmost refrigerant section 21 is used for the inflow of non-azeotropic refrigerant, and the lower end of the rightmost refrigerant section 21 is used for the outflow of non-azeotropic refrigerant. A fan blows air from right to left onto the multiple refrigerant sections 21. Alternatively, the lower end of the rightmost refrigerant section 21 is used for the inflow of non-azeotropic refrigerant, and the lower end of the leftmost refrigerant section 21 is used for the outflow of non-azeotropic refrigerant. A fan blows air from left to right onto the multiple refrigerant sections 21.

[0036] In some embodiments, such as Figure 1 As shown, the outdoor heat exchanger also includes a second refrigerant pipe 3, which connects two adjacent refrigerant sections 21. The second refrigerant pipe 3 connects the upper end of one of the two adjacent refrigerant sections 21 and the lower end of the other.

[0037] It should be noted that, along the direction in which the multiple refrigerant sections 21 are installed, the lower end of one of the two outermost refrigerant sections 21 and the upper end of the other refrigerant section 21 are not connected to the second refrigerant pipe 3.

[0038] It is understandable that the second refrigerant pipe 3 is used to connect adjacent refrigerant sections 21. Furthermore, since the refrigerant flows from top to bottom in the second refrigerant pipe 3, the positive effects of the anti-gravity flow of the refrigerant in the refrigerant section 21 far outweigh the negative effects of the flow direction in the second refrigerant pipe 3.

[0039] For example, the outdoor heat exchanger includes two refrigerant sections 21 and a second refrigerant pipe 3, which is connected to the upper end of one of the refrigerant sections 21 and to the lower end of the other refrigerant section 21.

[0040] In some embodiments, such as Figure 1 As shown, the refrigerant section 21 is arranged in an S-shape.

[0041] It should be noted that "the refrigerant section 21 is S-shaped" means that the piping of the refrigerant section 21 is approximately S-shaped, but not exactly the same as an S-shape. Furthermore, the number of bends in the refrigerant section 21 is not limited to the number of bends in an S-shape; the refrigerant section 21 can have one bend, or it can have two or more bends.

[0042] It is understandable that the S-shaped arrangement allows the refrigerant section 21 to pass through multiple fins 1 sequentially and repeatedly, extending the length of each refrigerant section 21 and ensuring the anti-gravity flow of the refrigerant under heating conditions.

[0043] In some embodiments, such as Figure 1 As shown, the refrigerant section 21 includes multiple straight pipe sections and multiple bends. The multiple straight pipe sections are arranged side by side in a direction perpendicular to the direction in which the multiple refrigerant sections 21 are set. The bends are used to connect two adjacent straight pipe sections end to end.

[0044] It should be noted that "the bend in the pipe section is used to connect two adjacent straight pipe sections end to end" means that: along the direction in which multiple straight pipe sections are installed, the bottom straight pipe section is connected to the bend in the pipe section at only one end, and the other end of the bottom straight pipe section is used for refrigerant to flow in during heating; the top straight pipe section is connected to the bend in the pipe section at only one end, and the other end of the top straight pipe section is used for refrigerant to flow out during heating.

[0045] It is understandable that by using straight pipe sections to pass through multiple fins 1 in sequence, and using bent pipe sections to achieve refrigerant reversal, the refrigerant achieves anti-gravity flow in the bent pipe sections, which slows down the degree of component migration and alleviates the frosting phenomenon.

[0046] For example, in each refrigerant section 21, the number of bends is one less than the number of straight sections. Specifically, there are four straight sections and three bends. In each refrigerant section 21, the multiple straight sections can be arranged sequentially along the vertical direction or inclined sequentially along the vertical direction. If the inclination angle is less than 90 degrees, the refrigerant needs to overcome gravity when flowing through the bends. In each refrigerant section 21, each straight section can be inclined about the horizontal direction so that the refrigerant flows through the straight section from bottom to top.

[0047] In some embodiments, such as Figure 1As shown, under heating conditions, along the refrigerant flow direction, one end of the straight pipe section is higher than the other end of the straight pipe section, or both ends of the straight pipe section are flush.

[0048] It should be noted that "one end of the straight pipe section is higher than the other end of the straight pipe section along the refrigerant flow direction" means that the refrigerant flows upward.

[0049] Understandably, this requires the refrigerant to overcome gravity as it flows through the straight pipe section, further reducing component migration and improving frosting. Depending on the actual situation, the two ends of the straight pipe section can also be flush, using only the bend in the pipe section to achieve anti-gravity refrigerant flow.

[0050] In some embodiments, such as Figure 1 As shown, the outdoor heat exchanger also includes a fan. When the non-azeotropic refrigerant flows through multiple refrigerant sections 21 in sequence along the first direction, the fan's outlet direction is opposite to the first direction.

[0051] It should be noted that "the non-azeotropic refrigerant flows through multiple refrigerant sections 21 in sequence along the first direction" means that the direction in which the non-azeotropic refrigerant enters from one refrigerant section 21 to another is the first direction. It does not refer to the flow direction in the second refrigerant pipe 3, nor does it refer to the flow direction of the non-azeotropic refrigerant in the refrigerant section 21.

[0052] Understandably, during heating operation, as the refrigerant flows through multiple refrigerant sections 21 in the first direction, the temperature of the refrigerant gradually increases. The fan first blows through the refrigerant section 21 where the refrigerant is overheated, which can slightly reduce the air temperature and humidity. Then, it blows through the refrigerant section 21 where the temperature is lower and the humidity is greater, which can better improve the frosting problem.

[0053] For example, multiple refrigerant sections 21 are arranged horizontally side by side. When the outdoor heat exchanger evaporates, the non-azeotropic refrigerant enters the first refrigerant pipe 2 from the leftmost refrigerant section 21 and flows out of the first refrigerant pipe 2 from the rightmost refrigerant section 21. The direction from the leftmost refrigerant section 21 to the rightmost refrigerant section 21 is opposite to the air outlet direction of the fan.

[0054] In some embodiments, such as Figure 1 As shown, there are multiple first refrigerant pipes 2, which are arranged vertically.

[0055] It is understandable that distributing the refrigerant into multiple first refrigerant pipes 2 improves the refrigerant's heat exchange efficiency. Furthermore, the refrigerant undergoes anti-gravity flow in each of the first refrigerant pipes 2.

[0056] For example, different first refrigerant pipes 2 may include the same or different numbers of refrigerant segments 21.

[0057] In some embodiments, such as Figure 1 As shown, the outdoor heat exchanger also includes a flute-shaped tube and a distributor 5. The flute-shaped tube is connected to the upper end of a plurality of first refrigerant pipes 2, and the distributor 5 is connected to the lower end of a plurality of first refrigerant pipes 2. The flute-shaped tube is higher than the distributor 5.

[0058] As the name suggests, a flute-shaped tube has a structure similar to a flute, with holes at the upper ends of multiple first refrigerant pipes 2. The distributor 5 is used to distribute refrigerant into the multiple first refrigerant pipes 2 during heating operation.

[0059] This application also provides an air conditioner, which includes the above-mentioned outdoor heat exchanger and indoor heat exchanger. The specific structure of the outdoor heat exchanger is as described in the above embodiments. Since this air conditioner adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0060] In the above embodiments, the descriptions of each embodiment have different focuses. Parts not described in detail in a particular embodiment can be referred to in the relevant descriptions of other embodiments. In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0061] The outdoor heat exchanger and air conditioner provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An outdoor heat exchanger, characterized in that, include: Multiple fins (1), arranged side by side and spaced apart; and, The first refrigerant pipe (2) is arranged sequentially from bottom to top for supplying non-azeotropic refrigerant flow, and the first refrigerant pipe (2) passes through multiple fins (1); When the outdoor heat exchanger is evaporating, the non-azeotropic refrigerant flows from bottom to top through the first refrigerant pipe (2).

2. The outdoor heat exchanger according to claim 1, characterized in that, The first refrigerant pipe (2) includes at least two refrigerant sections (21) arranged side by side. Each of the refrigerant sections (21) passes through a plurality of fins (1). Two adjacent refrigerant sections (21) are connected to each other. When the outdoor heat exchanger is evaporating, each of the refrigerant sections (21) is used to allow non-azeotropic refrigerant to flow from bottom to top.

3. The outdoor heat exchanger according to claim 2, characterized in that, It also includes a second refrigerant pipe (3), which connects two adjacent refrigerant sections (21) and connects the upper end of one of the two adjacent refrigerant sections (21) to the lower end of the other.

4. The outdoor heat exchanger according to claim 2, characterized in that, The refrigerant section (21) is arranged in an S-shape.

5. The outdoor heat exchanger according to claim 4, characterized in that, The refrigerant section (21) includes multiple straight pipe sections and multiple bends. The multiple straight pipe sections are arranged side by side along a direction perpendicular to the setting direction of the multiple refrigerant sections (21). The bends are used to connect two adjacent straight pipe sections end to end.

6. The outdoor heat exchanger according to claim 5, characterized in that, In heating mode, along the refrigerant flow direction, one end of the straight pipe section is higher than the other end of the straight pipe section, or both ends of the straight pipe section are flush.

7. The outdoor heat exchanger according to claim 2, characterized in that, It also includes a fan, and when the non-azeotropic refrigerant flows sequentially through the multiple refrigerant sections (21) in the first direction, the air outlet direction of the fan is opposite to the first direction.

8. The outdoor heat exchanger according to claim 1, characterized in that, Multiple first refrigerant pipes (2) are provided, and multiple first refrigerant pipes (2) are arranged vertically.

9. The outdoor heat exchanger according to claim 8, characterized in that, It also includes a flute and a distributor (5), the flute being connected to the upper end of a plurality of first refrigerant pipes (2), the distributor (5) being connected to the lower end of a plurality of first refrigerant pipes (2), and the flute being higher than the distributor (5).

10. An air conditioner, characterized in that, It includes an outdoor heat exchanger as described in any one of claims 1-9 and an indoor heat exchanger.

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