Heat exchanger and fan coil

Abstract

The utility model provides a heat exchanger and a fan coil, the fan coil comprises a shell, a fan, a water pan and the heat exchanger, the fan is installed on one side of the shell, the water pan is installed below the shell, a refrigerating part and a heating part in the heat exchanger are both located in a heat exchange cavity of the shell, the refrigerating part is close to the fan relative to the heating part, and the water pan is located below the shell. An air outlet of the fan blows air towards the upper middle portion of the refrigerating part. A refrigerating part and a heating part in the heat exchanger operate according to needs, a refrigerating pipe inputs and outputs cooled water through a refrigerating water collecting pipe and exchanges heat with air for refrigeration, and a heating pipe inputs and outputs cooled water through a heating water collecting pipe and exchanges heat with air for heating. According to the technical scheme, the outer diameter of an existing refrigerating pipe and the outer diameter of an existing heating pipe are the same, the outer diameter of the refrigerating pipe ranges from 3 mm to 9 mm and is smaller than that of the heating pipe, and the outer diameter of the heating pipe ranges from 7 mm to 12 mm, so that the outer diameter of the refrigerating pipe is reduced, the material consumption is reduced, and the production cost of the heat exchanger and the fan coil is reduced.

Description

Technical Field

[0001] This utility model relates to the field of fan coil unit technology, specifically to a heat exchanger and a fan coil unit. Background Technology

[0002] The heat exchanger in a four-pipe fan coil unit typically includes multiple rows of cooling pipes and one row of heating pipes. The water in the cooling pipes and the water in the heating pipes operate independently. When cooling is needed, the water in the cooling pipes flows while the water in the heating pipes remains still. The air blown by the fan comes into contact with the cooling pipes for heat exchange, thus providing cooling. When heating is needed, the water in the heating pipes flows while the water in the cooling pipes remains still. The air blown by the fan comes into contact with the heating pipes for heat exchange, thus providing heating.

[0003] The above design can flexibly meet the heat exchange needs of different seasons. However, the industry currently generally uses refrigeration pipes and heating pipes of the same diameter, which is relatively expensive, and there is room for optimization in terms of cost and other aspects. Utility Model Content

[0004] This invention provides a heat exchanger and a fan coil unit that, while meeting heat exchange requirements, solves the problem of high cost of existing fan coil units.

[0005] To address the aforementioned problems, according to one aspect of this utility model, a heat exchanger is provided, comprising a refrigeration section, a heating section, a refrigeration water collection pipe, and a heating water collection pipe. The refrigeration section receives water from and exits through the refrigeration water collection pipe, and the heating section receives water from and exits through the heating water collection pipe. The refrigeration section includes at least two rows of refrigeration pipes, and the heating section includes at least one row of heating pipes. The outer diameter of the refrigeration pipes is 3mm to 9mm, and the outer diameter of the heating pipes is 7mm to 12mm, with the outer diameter of the refrigeration pipes being smaller than that of the heating pipes.

[0006] Furthermore, the outer diameter of the cooling pipe is 3mm to 6.9mm, and the outer diameter of the heating pipe is 7mm to 10mm.

[0007] Furthermore, both the cooling and heating pipes are made of copper, with the cooling pipe having an outer diameter of 5mm and the heating pipe having an outer diameter of 7mm.

[0008] Furthermore, multiple cooling pipes in each row of cooling pipes are arranged in an inclined direction, with the angle between the inclined direction and the horizontal direction being 30° to 60°, and multiple heating pipes in each row of heating pipes are arranged in a vertical direction; the upper end of the cooling section and the upper end of the heating section are connected.

[0009] Furthermore, the spacing between two adjacent refrigeration tubes in each row of refrigeration tubes is 15mm to 20mm, and the spacing between two adjacent rows of refrigeration tubes is 11mm to 18mm; the spacing between two adjacent heating tubes in each row of heating tubes is 15mm to 30mm.

[0010] Furthermore, the refrigeration section includes three rows of refrigeration pipes, and the heating section includes one row of heating pipes; the refrigeration section includes multiple refrigeration fins arranged side by side, with each refrigeration pipe passing through multiple refrigeration fins, and the heating section includes multiple heating fins arranged side by side, with each heating pipe passing through multiple heating fins.

[0011] Furthermore, each row of cooling pipes includes 9 to 11 cooling pipes, and each row of heating pipes includes 9 to 11 heating pipes.

[0012] Furthermore, the refrigeration pipes in the refrigeration section form multiple refrigeration flow paths, with multiple refrigeration pipes in each refrigeration flow path connected in sequence and at least some of the multiple refrigeration pipes located in different rows. The inlet of the refrigeration flow path is located below the outlet of the refrigeration flow path, and the inlet and outlet of the refrigeration flow path are respectively connected to the refrigeration water collection pipe. The heating pipes in the heating section form multiple heating flow paths, with multiple heating pipes in each heating flow path connected in sequence. The inlet of the heating flow path is located below the outlet of the heating flow path, and the inlet and outlet of the heating flow path are respectively connected to the heating water collection pipe.

[0013] Furthermore, the refrigeration section includes 5 to 7 refrigeration flow paths, each refrigeration flow path including 4 to 6 refrigeration pipes, wherein in the water flow direction of the refrigeration flow path, the height of the next refrigeration pipe is not lower than the height of the previous refrigeration pipe; and / or, the heating section includes 4 to 5 heating flow paths, each heating flow path including 2 to 4 heating pipes, wherein in the water flow direction of the heating flow path, the height of the next heating pipe is not lower than the height of the previous heating pipe.

[0014] Specifically, the refrigeration section includes three rows of refrigeration pipes. The first row of refrigeration pipes includes 10 refrigeration pipes, the second row of refrigeration pipes includes 9 refrigeration pipes, and the third row of refrigeration pipes includes 9 refrigeration pipes. The refrigeration section includes 5 refrigeration flow paths. The uppermost refrigeration flow path includes 4 refrigeration pipes, and the other refrigeration flow paths include 6 refrigeration pipes. The inlet of each refrigeration flow path is located in the first row of refrigeration pipes, and the outlet of each refrigeration flow path is located in the third row of refrigeration pipes.

[0015] Alternatively, the refrigeration unit includes three rows of refrigeration pipes, with the first row including 9 refrigeration pipes, the second row including 9 refrigeration pipes, and the third row including 10 refrigeration pipes; the refrigeration unit includes 7 refrigeration flow paths, each including 4 refrigeration pipes; the inlet of each refrigeration flow path is located in the first row of refrigeration pipes, and the outlet of each refrigeration flow path is located in the third row of refrigeration pipes.

[0016] Alternatively, the refrigeration unit includes three rows of refrigeration pipes: the first row includes 11 refrigeration pipes, the second row includes 11 refrigeration pipes, and the third row includes 10 refrigeration pipes; the refrigeration unit includes eight refrigeration flow paths, each of which includes four refrigeration pipes; the inlet of each refrigeration flow path is located in the first row of refrigeration pipes, the outlet of the uppermost refrigeration flow path is located in the second row of refrigeration pipes, and the outlets of the other refrigeration flow paths are located in the third row of refrigeration pipes.

[0017] According to another aspect of the present invention, a fan coil unit is provided, which includes a housing, a fan, a water collection tray and the aforementioned heat exchanger. The fan is installed on one side of the housing, and the water collection tray is installed below the housing. The cooling section and the heating section in the heat exchanger are both located in the heat exchange chamber of the housing. The cooling section is closer to the fan than the heating section, and the air outlet of the fan blows air towards the upper middle part of the cooling section.

[0018] In this design, the cooling and heating sections of the heat exchanger operate as needed. Cooling pipes input and output cooled water through cooling water collection pipes, exchanging heat with the air to achieve cooling. Heating pipes input and output cooled water through heating water collection pipes, exchanging heat with the air to achieve heating. While existing cooling and heating pipes have the same outer diameter, this design uses cooling pipes with an outer diameter of 3mm to 9mm and heating pipes with an outer diameter of 7mm to 12mm. Furthermore, the outer diameter of the cooling pipes is smaller than that of the heating pipes, thus reducing the outer diameter of the cooling pipes compared to existing designs. This reduces material usage and lowers the production costs of the heat exchanger and fan coil units. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic diagram of the structure of a heat exchanger provided in an embodiment of the present invention is shown;

[0021] Figure 2 It shows Figure 1 Side view of the heat exchanger in the middle;

[0022] Figure 3 A schematic diagram of the flow path arrangement of a heat exchanger provided in an embodiment of this utility model is shown. Figure 1 ;

[0023] Figure 4 A schematic diagram of the flow path arrangement of a heat exchanger provided in an embodiment of this utility model is shown. Figure 2 ;

[0024] Figure 5 A schematic diagram of the flow path arrangement of a heat exchanger provided in an embodiment of this utility model is shown. Figure 3 ;

[0025] Figure 6 A schematic diagram of the structure of a fan coil unit provided in an embodiment of this utility model is shown.

[0026] The above figures include the following reference numerals:

[0027] 10. Refrigeration Department;

[0028] 11. Refrigeration pipe; 12. Refrigeration fins; 13. Refrigeration flow path;

[0029] 20. Heating section;

[0030] 21. Heating tube; 22. Heating fins; 23. Heating flow path;

[0031] 30. Cooling water collection pipe;

[0032] 40. Heating water collection pipe;

[0033] 50. Outer casing; 60. Fan; 70. Water tray. Detailed Implementation

[0034] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0035] like Figures 1 to 5 As shown, an embodiment of this utility model provides a heat exchanger, including a refrigeration section 10, a heating section 20, a refrigeration water collection pipe 30, and a heating water collection pipe 40. The refrigeration section 10 receives water and discharges water through the refrigeration water collection pipe 30, and the heating section 20 receives water and discharges water through the heating water collection pipe 40. The refrigeration section 10 includes at least two rows of refrigeration pipes 11, and the heating section 20 includes at least one row of heating pipes 21. The outer diameter of the refrigeration pipes 11 is 3mm to 9mm, and the outer diameter of the heating pipes 21 is 7mm to 12mm. The outer diameter of the refrigeration pipes 11 is smaller than the outer diameter of the heating pipes 21.

[0036] In this design, the refrigeration section 10 and heating section 20 of the heat exchanger operate as needed. The refrigeration pipe 11 inputs and outputs cooled water through two refrigeration water collection pipes 30, exchanging heat with the air to achieve refrigeration. The heating pipe 21 inputs and outputs cooled water through two heating water collection pipes 40, exchanging heat with the air to achieve heating. While existing refrigeration and heating pipes have the same outer diameter, in this design, the outer diameter of the refrigeration pipe 11 is 3mm to 9mm, and the outer diameter of the heating pipe 21 is 7mm to 12mm. Furthermore, the outer diameter of the refrigeration pipe 11 is smaller than that of the heating pipe 21, meaning the outer diameter of the refrigeration pipe 11 is reduced compared to existing designs. This reduces material usage and lowers the production costs of the heat exchanger and fan coil units.

[0037] Furthermore, the outer diameter of the cooling pipe 11 is 3mm to 6.9mm, for example 4mm or 6mm, and the outer diameter of the heating pipe 21 is 7mm to 10mm, for example 8mm or 9mm.

[0038] The materials and dimensions of the cooling pipe 11 and the heating pipe 21 are selected according to production needs. For example, in one specific embodiment, both the cooling pipe 11 and the heating pipe 21 are copper pipes, with the outer diameter of the cooling pipe 11 being 5mm and the outer diameter of the heating pipe 21 being 7mm. This design provides good heat exchange performance and reduces costs.

[0039] like Figures 2 to 5 As shown, in some embodiments, multiple cooling pipes 11 in each row of cooling pipes 11 are arranged in an inclined direction, with the angle between the inclined direction and the horizontal direction being 30° to 60°, and multiple heating pipes 21 in each row of heating pipes 21 are arranged in a vertical direction; the upper end of the cooling section 10 and the upper end of the heating section 20 are connected.

[0040] In the heat exchanger, the number of multiple refrigeration tubes 11 in each row of refrigeration tubes 11 is greater than the number of multiple heating tubes 21 in each row of heating tubes 21. By arranging each row of refrigeration tubes 11 at an angle relative to the horizontal direction, the height dimension and space occupied by the refrigeration section 10 can be reduced. For example, the angle between the inclination direction of each row of refrigeration tubes 11 and the horizontal direction is 45°. Connecting the upper end of the refrigeration section 10 and the upper end of the heating section 20 can improve the overall structural strength of the heat exchanger.

[0041] In this scheme, the distance between two adjacent cooling pipes 11 in each row of cooling pipes 11 is 15mm to 20mm, for example 19.05 or 19.5mm, and the distance between two adjacent rows of cooling pipes 11 is 11mm to 18mm, for example 16.5 or 11.6mm; the distance between two adjacent heating pipes 21 in each row of heating pipes 21 is 15mm to 30mm.

[0042] The above spacing range design ensures that the space between the refrigeration pipes 11 and the heating pipes 21 is neither too small to affect airflow, nor too large to cause the heat exchanger to occupy too much space, thus enabling the heat exchanger to have a good heat exchange effect.

[0043] In some embodiments, the refrigeration unit 10 includes three rows of refrigeration pipes 11, and the heating unit 20 includes one row of heating pipes 21. In the heat exchanger of the fan coil unit, the refrigeration pipes 11 are arranged in three rows, and the heating pipes 21 are arranged in one row. This can control costs while meeting the heat exchange requirements of different seasons.

[0044] The refrigeration section 10 includes multiple refrigeration fins 12 arranged side by side, with each refrigeration pipe 11 passing through the multiple refrigeration fins 12. The heating section 20 includes multiple heating fins 22 arranged side by side, with each heating pipe 21 passing through the multiple heating fins 22. The multiple refrigeration fins 12 and heating fins 22 can both fix the refrigeration pipes 11 and heating pipes 21 and increase the contact area with air, thereby improving the heat exchange effect.

[0045] exist Figures 3 to 5 In this design, each row of cooling pipes 11 includes 9 to 11 cooling pipes 11, and each row of heating pipes 21 includes 9 to 11 heating pipes 21. Setting the number of cooling pipes 11 in each row of cooling pipes 11 to 9 to 11, and the number of heating pipes 21 in each row of heating pipes 21 to 9 to 11, avoids poor heat exchange effect due to too few pipes, and avoids high cost due to too many pipes.

[0046] In this application, the refrigeration pipes 11 in the refrigeration section 10 form multiple refrigeration flow paths 13. The multiple refrigeration pipes 11 in each refrigeration flow path 13 are sequentially connected, and at least some of the multiple refrigeration pipes 11 are located in different rows. The inlet of the refrigeration flow path 13 is located below the outlet of the refrigeration flow path 13. The inlet and outlet of the refrigeration flow path 13 are respectively connected to the refrigeration water collection pipe 30. Adjacent refrigeration pipes 11 in each refrigeration flow path 13 are connected by a bend joint. Through the above arrangement, cooling water can be simultaneously input and output in the multiple refrigeration flow paths 13, which can improve the heat exchange uniformity of the refrigeration pipes 11 at different locations. Furthermore, the cooling water adopts a bottom-in, top-out method, which can reduce hydraulic loss and noise.

[0047] The heating tubes 21 in the heating section 20 form multiple heating flow paths 23. The multiple heating tubes 21 in each heating flow path 23 are connected sequentially. The inlet of each heating flow path 23 is located below its outlet, and both the inlet and outlet are connected to the heating water collection pipe 40. Adjacent heating tubes 21 in each heating flow path 23 are connected via a bend joint. This configuration allows for simultaneous input and output of heated water into and out of the multiple heating flow paths 23, improving the heat exchange uniformity of the heating tubes 21 at different locations. Furthermore, the bottom-in, top-out heating water design reduces hydraulic loss and noise.

[0048] Furthermore, such as Figure 2 As shown, the two cooling water collection pipes 30 and the two heating water collection pipes 40 are located on the same side of the heat exchanger, which facilitates installation and maintenance.

[0049] In some embodiments, the refrigeration unit 10 includes 5 to 7 refrigeration flow paths 13, each refrigeration flow path 13 including 4 to 6 refrigeration pipes 11, wherein in the water flow direction of the refrigeration flow path 13, the height of the next refrigeration pipe 11 is not lower than the height of the previous refrigeration pipe 11; and / or, the heating unit 20 includes 4 to 5 heating flow paths 23, each heating flow path 23 including 2 to 4 heating pipes 21, wherein in the water flow direction of the heating flow path 23, the height of the next heating pipe 21 is not lower than the height of the previous heating pipe 21. Through the above arrangement, the uniformity of water flow distribution can be improved, water resistance reduced, and heat exchange effect enhanced.

[0050] like Figure 3 As shown, in one specific embodiment, the refrigeration unit 10 includes three rows of refrigeration pipes 11. The first row of refrigeration pipes 11 includes 10 refrigeration pipes 11, the second row of refrigeration pipes 11 includes 9 refrigeration pipes 11, and the third row of refrigeration pipes 11 includes 9 refrigeration pipes 11. The refrigeration unit 10 includes 5 refrigeration flow paths 13, wherein the uppermost refrigeration flow path 13 includes 4 refrigeration pipes 11, and the other refrigeration flow paths 13 include 6 refrigeration pipes 11. The inlet of each refrigeration flow path 13 is located in the first row of refrigeration pipes 11, and the outlet of each refrigeration flow path 13 is located in the third row of refrigeration pipes 11.

[0051] like Figure 4 As shown, in one specific embodiment, the refrigeration unit 10 includes three rows of refrigeration pipes 11. The first row of refrigeration pipes 11 includes 9 refrigeration pipes 11, the second row of refrigeration pipes 11 includes 9 refrigeration pipes 11, and the third row of refrigeration pipes 11 includes 10 refrigeration pipes 11. The refrigeration unit 10 includes 7 refrigeration flow paths 13, each refrigeration flow path 13 including 4 refrigeration pipes 11. The inlet of each refrigeration flow path 13 is located in the first row of refrigeration pipes 11, and the outlet of each refrigeration flow path 13 is located in the third row of refrigeration pipes 11.

[0052] like Figure 5As shown, in one specific embodiment, the refrigeration unit 10 includes three rows of refrigeration pipes 11. The first row of refrigeration pipes 11 includes 11 refrigeration pipes 11, the second row of refrigeration pipes 11 includes 11 refrigeration pipes 11, and the third row of refrigeration pipes 11 includes 10 refrigeration pipes 11. The refrigeration unit 10 includes eight refrigeration flow paths 13, each refrigeration flow path 13 including four refrigeration pipes 11. The inlet of each refrigeration flow path 13 is located in the first row of refrigeration pipes 11, the outlet of the uppermost refrigeration flow path 13 is located in the second row of refrigeration pipes 11, and the outlets of the other refrigeration flow paths 13 are located in the third row of refrigeration pipes 11.

[0053] The different piping arrangements described above demonstrate that, based on actual measurements, they meet national performance and water resistance requirements. These improvements not only enhance system energy efficiency but also reduce operating costs, aligning with current energy conservation and emission reduction trends. This design enables us to provide customers with more efficient and energy-saving air conditioning system solutions, meeting the diverse needs of our clients.

[0054] like Figures 3 to 5 As shown, in order to reduce costs, some positions of the cooling fins 12 may not require the installation of cooling pipes 11, while still meeting heat exchange requirements. These positions are chosen to be far from the air outlet of the fan 60 to minimize the impact on heat exchange.

[0055] like Figure 6 As shown, one embodiment of this application also provides a fan coil unit, which includes a housing 50, a fan 60, a water collection tray 70, and the aforementioned heat exchanger. The fan 60 is installed on one side of the housing 50, and the water collection tray 70 is installed below the housing 50. The cooling section 10 and the heating section 20 in the heat exchanger are both located within the heat exchange chamber of the housing 50. The cooling section 10 is closer to the fan 60 than the heating section 20, and the air outlet of the fan 60 blows air towards the upper middle part of the cooling section 10. This fan coil unit reduces the outer diameter of the cooling pipe 11 compared to existing solutions, thereby reducing material usage and lowering the production cost of the fan coil unit.

[0056] The above description is merely an optional embodiment of this solution and is not intended to limit the solution. Various modifications and variations can be made to this solution by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this solution should be included within the scope of protection of this solution.

[0057] It should be noted that the terminology used herein 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.

[0058] 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 invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the accompanying 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 exemplary only 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 figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0059] In the description of this solution, it should be understood that directional terms such as "front, back, up, down, left, right," "horizontal, vertical, horizontal," and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the attached drawings. They are used only for the convenience of describing this solution and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or component 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 solution. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself; "multiple" refers to a quantity of two or more.

[0060] 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.

[0061] 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 should not be construed as limiting the scope of protection of this solution.

Claims

1. A heat exchanger, characterized by, The heat exchanger comprises a refrigeration part (10), a heating part (20), a refrigeration water collecting pipe (30) and a heating water collecting pipe (40), the refrigeration part (10) is connected to the refrigeration water collecting pipe (30) for water inlet and outlet, and the heating part (20) is connected to the heating water collecting pipe (40) for water inlet and outlet; wherein the refrigeration part (10) comprises at least two rows of refrigeration pipes (11), the heating part (20) comprises at least one row of heating pipes (21), the outer diameter of the refrigeration pipe (11) is 3-9 mm, the outer diameter of the heating pipe (21) is 7-12 mm, and the outer diameter of the refrigeration pipe (11) is smaller than that of the heating pipe (21).

2. The heat exchanger of claim 1, wherein The refrigeration pipe (11) and the heating pipe (21) are both copper pipes, the outer diameter of the refrigeration pipe (11) is 5 mm, and the outer diameter of the heating pipe (21) is 7 mm.

3. The heat exchanger of claim 1, wherein The refrigeration pipes (11) in each row are arranged in an inclined direction, the angle between the inclined direction and the horizontal direction is 30-60°, the heating pipes (21) in each row are arranged in a vertical direction, and the upper end of the refrigeration part (10) is connected to the upper end of the heating part (20).

4. The heat exchanger of claim 1, wherein The distance between two adjacent refrigeration pipes (11) in each row is 15-20 mm, the distance between two adjacent rows of refrigeration pipes (11) is 11-18 mm, and the distance between two adjacent heating pipes (21) in each row is 15-30 mm.

5. The heat exchanger of claim 1, wherein The refrigeration part (10) comprises three rows of refrigeration pipes (11), the heating part (20) comprises one row of heating pipes (21), the refrigeration part (10) comprises a plurality of refrigeration fins (12) arranged side by side, each refrigeration pipe (11) passes through the plurality of refrigeration fins (12), the heating part (20) comprises a plurality of heating fins (22) arranged side by side, and each heating pipe (21) passes through the plurality of heating fins (22).

6. The heat exchanger of claim 5, wherein Each row of refrigeration pipes (11) comprises 9-11 refrigeration pipes (11), and each row of heating pipes (21) comprises 9-11 heating pipes (21).

7. The heat exchanger according to claim 1, wherein, the refrigeration pipes (11) in the refrigeration part (10) form a plurality of refrigeration flow paths (13), the refrigeration pipes (11) in each refrigeration flow path (13) are sequentially connected, and at least part of the refrigeration pipes (11) are located in different rows, the inlet of the refrigeration flow path (13) is located below the outlet of the refrigeration flow path (13), and the inlet and the outlet of the refrigeration flow path (13) are connected to the refrigeration water collecting pipe (30). The heating pipes (21) in the heating part (20) form a plurality of heating flow paths (23), a plurality of the heating pipes (21) in each of the heating flow paths (23) are sequentially communicated, the inlet of the heating flow path (23) is located below the outlet of the heating flow path (23), and the inlet and the outlet of the heating flow path (23) are communicated with the heating water collecting pipe (40) respectively.

8. The heat exchanger of claim 7, wherein, The refrigeration part (10) comprises 5-7 refrigeration flow paths (13), each of the refrigeration flow paths (13) comprises 4-6 refrigeration pipes (11), and in the water flow direction of the refrigeration flow path (13), the height of the position of the next refrigeration pipe (11) is not lower than the height of the position of the previous refrigeration pipe (11); and / or, The heating part (20) comprises 4-5 heating flow paths (23), each of the heating flow paths (23) comprises 2-4 heating pipes (21), and in the water flow direction of the heating flow path (23), the height of the position of the next heating pipe (21) is not lower than the height of the position of the previous heating pipe (21).

9. The heat exchanger of claim 7, wherein The refrigeration part (10) comprises three rows of refrigeration pipes (11), the first row of refrigeration pipes (11) comprises 10 refrigeration pipes (11), the second row of refrigeration pipes (11) comprises 9 refrigeration pipes (11), and the third row of refrigeration pipes (11) comprises 9 refrigeration pipes (11); the refrigeration part (10) comprises 5 refrigeration flow paths (13), wherein the uppermost refrigeration flow path (13) comprises 4 refrigeration pipes (11), and the other refrigeration flow paths (13) each comprise 6 refrigeration pipes (11); the inlet of each refrigeration flow path (13) is located in the first row of refrigeration pipes (11), and the outlet of each refrigeration flow path (13) is located in the third row of refrigeration pipes (11).

10. The heat exchanger of claim 7, wherein The refrigeration part (10) comprises three rows of refrigeration pipes (11), the first row of refrigeration pipes (11) comprises 9 refrigeration pipes (11), the second row of refrigeration pipes (11) comprises 9 refrigeration pipes (11), and the third row of refrigeration pipes (11) comprises 10 refrigeration pipes (11); the refrigeration part (10) comprises 7 refrigeration flow paths (13), each of the refrigeration flow paths (13) comprises 4 refrigeration pipes (11); the inlet of each refrigeration flow path (13) is located in the first row of refrigeration pipes (11), and the outlet of each refrigeration flow path (13) is located in the third row of refrigeration pipes (11). The refrigeration part (10) comprises three rows of refrigeration pipes (11), the first row of refrigeration pipes (11) comprises 9 refrigeration pipes (11), the second row of refrigeration pipes (11) comprises 9 refrigeration pipes (11), and the third row of refrigeration pipes (11) comprises 10 refrigeration pipes (11); the refrigeration part (10) comprises 7 refrigeration flow paths (13), each of the refrigeration flow paths (13) comprises 4 refrigeration pipes (11); the inlet of each refrigeration flow path (13) is located in the first row of refrigeration pipes (11), and the outlet of each refrigeration flow path (13) is located in the third row of refrigeration pipes (11).

11. The heat exchanger of claim 7, wherein The refrigeration unit (10) includes three rows of refrigeration pipes (11). The first row of refrigeration pipes (11) includes 11 refrigeration pipes (11), the second row of refrigeration pipes (11) includes 11 refrigeration pipes (11), and the third row of refrigeration pipes (11) includes 10 refrigeration pipes (11). The refrigeration unit (10) includes eight refrigeration flow paths (13), and each refrigeration flow path (13) includes four refrigeration pipes (11). The inlet of each refrigeration flow path (13) is located in the first row of refrigeration pipes (11), the outlet of the uppermost refrigeration flow path (13) is located in the second row of refrigeration pipes (11), and the outlets of the other refrigeration flow paths (13) are located in the third row of refrigeration pipes (11).

12. A fan-coil, characterized by The fan coil unit includes a housing (50), a fan (60), a water receiving tray (70), and a heat exchanger according to any one of claims 1 to 11. The fan (60) is installed on one side of the housing (50), and the water receiving tray (70) is installed below the housing (50). The cooling section (10) and the heating section (20) in the heat exchanger are both located in the heat exchange chamber of the housing (50). The cooling section (10) is closer to the fan (60) than the heating section (20), and the air outlet of the fan (60) blows air towards the upper middle part of the cooling section (10).

Images