Fan coil and air conditioning system

Abstract

The utility model relates to a fan coil and an air conditioning system.The fan coil comprises a shell, an air chamber is arranged in the shell, and the shell is provided with an air inlet and an air outlet which communicate with the air chamber; the fan is used for driving airflow to pass through the air chamber; the heat exchanger is located in the air chamber, the heat exchanger is located on the downstream portion of the draught fan in the airflow direction, the heat exchanger is provided with a bent portion in smooth transition, and the inner concave side of the bent portion faces the draught fan. The heat exchanger in the fan coil can be better matched with the shell and the air duct, the height of the fan coil can be effectively reduced, the heat exchange performance is greatly improved compared with a vertical heat exchanger, and the assembly process is relatively simple.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration and air conditioning, and in particular to a fan coil unit and an air conditioning system. Background Art

[0002] As one of the four important components in the air conditioning system, the finned tube evaporator is widely used in the refrigeration and air conditioning industry. For fan coil units, the conventional heat exchangers they include are mostly vertical copper tube aluminum fin heat exchangers. Although they can meet the existing performance standards, with the continuous increase in various requirements, the height and performance requirements of fan coil units are constantly increasing.

[0003] For example, when the installation space is limited, it is often necessary to lower the height of the fan coil unit. However, lowering the height by changing the size of the heat exchanger will result in a corresponding loss of heat exchange area, which will reduce the heat exchange performance of the fan coil unit. How to adapt to a smaller installation space based on the original heat exchange area (i.e., the size of the heat exchanger remains unchanged) is a technical problem that needs to be solved. Utility Model Content

[0004] The present application provides a fan coil unit with further optimized structure and spatial layout.

[0005] The present application discloses a fan coil unit, comprising:

[0006] A shell, the interior of the shell is an air chamber, and the shell is provided with an air inlet and an air outlet communicated with the air chamber;

[0007] A fan, used to drive airflow through the air chamber;

[0008] The heat exchanger is located in the air chamber and is located downstream of the fan along the air flow direction. The heat exchanger has a curved portion with a smooth transition, and the concave side of the curved portion faces the fan.

[0009] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0010] In one embodiment, the fan is located outside the wind chamber, the wind path of the fan is connected to the air inlet of the wind chamber, the minimum distance between the heat exchanger and the air inlet is L, and satisfies 10mm≤L≤150mm;

[0011] Or the fan has an impeller located in the wind chamber, and along the radial direction of the impeller, the minimum distance between the heat exchanger and the impeller is L, and satisfies 10mm≤L≤150mm.

[0012] In one embodiment, the height of the wind chamber is H, the diameter of the impeller is D, and they satisfy D:H=(0.6-0.9):1.

[0013] In one embodiment, the heat exchanger half surrounds the impeller.

[0014] In one embodiment, the bending angle of the bending portion is 30 degrees to 60 degrees; the center of the circle corresponding to the bending portion points to the impeller or the air inlet.

[0015] In one embodiment, the heat exchanger extends along a smooth curved path as a whole, or at least a portion thereof extends along a straight path;

[0016] There are one or more bending parts. When there are multiple bending parts (330), the steering angle directions between the multiple bending parts are the same or different.

[0017] In one embodiment, the heat exchanger extends as a whole along an arc path, the curvature radius of the arc path is R, and satisfies 50mm≤R≤300mm.

[0018] In one embodiment, the heat exchanger comprises one or more working sections, the multiple working sections are integrally structured or spliced ​​with each other, and at least one of the working sections has the bending portion;

[0019] The heat exchanger comprises fins and cooling medium pipelines inserted and fixed to the fins. The fins have the bending parts. In the same working section, the fins are an integral structure on both sides of the bending parts.

[0020] In one embodiment, the air outlet is multiple and includes at least:

[0021] A first air outlet, located on one side of the shell in a horizontal direction;

[0022] A second air outlet is located on the top side or the bottom side of the housing;

[0023] The heat exchanger comprises at least two working sections, and each working section is respectively configured at a corresponding air outlet.

[0024] The present application also provides an air conditioning system having the fan coil unit described in the present application.

[0025] The heat exchanger in the fan coil unit of the present application can better cooperate with the shell and the air duct, which can effectively reduce the height of the fan coil unit, and the heat exchange performance is greatly improved compared with the vertical heat exchanger, and the assembly process is relatively simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 This is a schematic diagram of the structure of a fan coil unit in one embodiment of the present application;

[0028] Figure 2 This is a schematic structural diagram of a fan coil unit in another embodiment of the present application;

[0029] Figure 3 This is a schematic structural diagram of a fan coil unit in another embodiment of the present application;

[0030] Figure 4 for Figure 2 Schematic diagram of the structure of the heat exchanger in the fan coil unit;

[0031] Figure 5 This is a schematic structural diagram of a heat exchanger in another embodiment of the present application;

[0032] Figure 6 This is a schematic structural diagram of a heat exchanger in another embodiment of the present application;

[0033] Figure 7 This is a schematic structural diagram of a heat exchanger in another embodiment of the present application;

[0034] Figure 8 This is a schematic structural diagram of a heat exchanger in another embodiment of the present application;

[0035] Fig. 9 This is a schematic structural diagram of a heat exchanger in another embodiment of the present application;

[0036] Fig.10 This is a schematic structural diagram of a heat exchanger in another embodiment of the present application;

[0037] Fig.11 for Fig.10 Enlarged view of part A.

[0038] The reference numerals of the components are as follows:

[0039] 100, casing; 110, air chamber; 120, air inlet; 130, air outlet; 131, first air outlet; 132, second air outlet; 140, grille; 200, fan; 210, impeller; 300, heat exchanger; 301, first working section; 302, second working section; 310, fin; 320, cooling medium pipeline; 330, bending portion; 331, first bending portion; 332, second bending portion. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0041] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above”, or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level (or in a state of use, or from a certain perspective of the drawing) than the second feature. A first feature being “below”, “below”, or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level (or in a state of use, or from a certain perspective of the drawing) than the second feature.

[0044] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0045] In existing fan coil units, the heat exchangers used are mostly arranged vertically, such as copper tube aluminum fin heat exchangers. However, in order to meet the height restrictions of installation space or design size, the height of the heat exchanger is often directly reduced, resulting in performance degradation.

[0046] See also Figure 1 to Figure 3 The fan coil units provided in some embodiments of the present application have been improved with respect to the heat exchanger structure and the overall spatial layout. For example, the fan coil unit includes a shell 100. The interior of the shell 100 is a wind chamber 110 for air circulation and heat exchange. The shell 100 is provided with an air inlet 120 and an air outlet 130 connected to the wind chamber 110. There is no strict restriction on the specific positions of the air inlet 120 and the air outlet 130, which can be set according to the application scenario.

[0047] The fan coil unit is also provided with a fan 200 for driving the airflow through the air chamber 110. The fan 200 (or main components) can be located in the air chamber 110 to directly drive the airflow, or the fan 200 can be located outside the air chamber 110 and connected to the air chamber 110 through an air path.

[0048] In this embodiment, a heat exchanger 300 is disposed in the air chamber 110, in the air flow direction (see Figure 1 to Figure 3 The heat exchanger 300 is located downstream of the fan 200, that is, the airflow first passes through the fan 200 and then interacts with the heat exchanger 300, which can further enhance the heat exchange effect. In addition, as one of the improvements, the heat exchanger 300 of this embodiment has a smoothly transitioned curved portion 330 ( Figure 1 to Figure 3 The portion shown in the dotted line box in the middle), and the concave side of the bent portion 330 faces the fan 200.

[0049] The smooth transition is understood as the overall extension trend of the heat exchanger 300, and does not strictly limit the specific shape of its edge. The smooth transition is easier to process and can flexibly adopt different molding processes. As for the heat exchanger 300 as a whole, the bending portion 330 can be a local area or an overall bend.

[0050] The curved portion 330 has a relatively concave side and a convex side, wherein the concave side faces the fan 200 and can form a surrounding trend for the fan 200 or the air inlet 120, which is more adapted to the air flow distribution characteristics in the air chamber 110 and ensures uniform heat exchange. The setting of the curved portion 330 can further reduce the height and volume while ensuring the heat exchange area, thereby achieving structural optimization.

[0051] In order to obtain a reasonable distribution of airflow, that is, to ensure the heat exchange effect, and quiet performance during operation, the heat exchanger 300 and the fan 200 should be kept at an appropriate distance. Figure 1In one embodiment, the fan 200 is located outside the air chamber 110, and a fan chamber connected to the air inlet 120 can be separately provided on one side of the housing 100, or the fan 200 is directly connected to the air inlet 120, so that the air path of the fan 200 is connected to the inside of the air chamber 110, and the minimum distance between the heat exchanger 300 and the air inlet 120 is L, and L is greater than or equal to 10mm, for example, the minimum distance L is 10mm to 16mm. When the fan 200 is directly connected to the air inlet 120, it can also be understood that the minimum distance between the heat exchanger 300 and the fan 200 is L.

[0052] See also Figure 2 and Figure 3 In other embodiments, the fan 200 may be a cross-flow fan and have an impeller 210 located in the air chamber 110. The perspective in the figure is the axial perspective of the impeller 210. Along the radial direction of the impeller 210, the minimum distance between the heat exchanger 300 and the impeller 210 is L, and L is greater than or equal to 10 mm, for example, the minimum distance L is 10 mm to 16 mm.

[0053] The appropriate distance between the heat exchanger 300 and the fan 200 is not only convenient for assembly and maintenance, ensuring the optimization of the space volume, but also can avoid noise problems caused by too close distance and improve the user experience. In order to further avoid temperature or wind pressure loss, the L value mentioned above is generally less than or equal to 150mm.

[0054] exist Figure 2 and Figure 3 In the fan built-in mode shown, the appropriate ratio of the impeller diameter of the crossflow fan wheel to the longitudinal height of the housing 100 is further optimized, wherein the height of the air chamber 110 is H, the diameter of the impeller 210 is D, and D:H=(0.6~0.9):1 is satisfied. Further preferred is D:H=(0.7~0.78):1. This setting can make the overall structure of the fan coil unit simple and compact. The simulation results show that it is beneficial to reduce the installation space occupied and relatively increase the heat exchange capacity of the crossflow fan wheel.

[0055] exist Figure 2 In the illustrated embodiment, the air outlet 130 is located on the left side of the housing 100 , that is, air is discharged from one side, and a grille 140 is provided at the air outlet 130 .

[0056] Combination Figure 4 It can be seen that the top of the heat exchanger 300 extends roughly vertically, the curved portion 330 is in the middle, and the bottom is inclined relative to the top toward the impeller 210, and the inclination angle α is greater than zero and less than or equal to 90 degrees, wherein the curved portion 330 occupies a local area of ​​the heat exchanger 300, while other areas extend roughly along a straight line.

[0057] The inclination angle α can also be understood as the bending angle of the curved portion 330. In order to optimize the contact angle between the airflow direction and the heat exchanger 300, the bending angle is further preferably 30 degrees to 60 degrees, wherein the center of the circle corresponding to the curved portion 330 points to the impeller 210 or the air inlet 120. Taking the center of the circle pointing to the impeller 210 as an example, it can be understood that each point on the curved portion 330 and the line connecting the center of the circle (or the extension line) intersects the impeller 210, thereby obtaining a better spatial position relationship between the heat exchanger 300 and the impeller 210 or the air inlet 120, and optimizing the airflow distribution and heat exchange effect.

[0058] Since the bottom of the heat exchanger 300 is tilted and the concave side of the curved portion 330 faces the impeller 210 , it forms a surrounding tendency for the impeller 210 , which can better adapt to the position of the air outlet 130 , ensure the uniformity of heat exchange, and help improve the overall heat exchange effect of the heat exchanger 300 .

[0059] Figure 3 In the illustrated embodiment, there are two air outlets 130, including a first air outlet 131 on the left side and a second air outlet 132 on the top side. Based on the correspondence with each air outlet, the heat exchanger 300 is correspondingly configured as multiple (multiple in this application is understood as at least two) working sections, for example, the first working section 301 is between the first air outlet 131 and the impeller 210, the second working section 302 is between the second air outlet 132 and the impeller 210, and the bending portion 330 is located in the middle of the first working section 301.

[0060] The heat exchanger 300 of each embodiment includes fins 310 and cooling medium pipelines 320 inserted and fixed to the fins 310. The cooling medium pipelines 320 can be ordinary metal pipes or microchannel pipes. The cooling medium pipelines 320 between each working section are interconnected, and the fins 310 can be an integrated structure or a split assembly according to the spatial arrangement. Figure 3 Taking the heat exchanger 300 in the figure as an example, the fins 310 of the first working section 301 are bent and formed separately, and then spliced ​​with the fins 310 of the second working section 302 by sheet metal. In other embodiments, the fins 310 of the two working sections can also be stamped by an integrated mold.

[0061] The heat exchanger 300 in this embodiment half-surrounds the impeller 210 , which can improve the heat exchange uniformity at each position of the heat exchanger 300 , and is beneficial to improving the overall heat exchange effect of the heat exchanger 300 .

[0062] See also Figures 5 to 11 In some embodiments, heat exchangers of different configurations are provided.

[0063] Figure 5In the embodiment shown, the heat exchanger 300 includes a first working section 301 and a second working section 302, which are joined and fixed to each other, wherein the first working section 301 extends along an arc as a whole, and the second working section 302 extends approximately along a straight line. Figure 3 Similar to the embodiment shown, the heat exchanger 300 using multiple working sections is not strictly limited to corresponding multiple air outlets, which increases the diversity of the heat exchanger flow path and the degree of air volume turbulence. Multiple air outlet directions can also be matched by splicing, which facilitates the design of the heat exchanger according to the spatial layout of the air chamber 110 and the fan 200 to increase the heat exchange capacity.

[0064] Figure 6 In the embodiment shown in , there are two bending parts, namely the first bending part 331 and the second bending part 332, which are transitionally connected by a straight extension part. The steering angle direction A1 of the first bending part 331 is the same as the steering angle direction A2 of the second bending part 332, that is, Figure 6 In the counterclockwise direction.

[0065] Figure 7 In the embodiment shown in , there are two bending parts, namely the first bending part 331 and the second bending part 332, which are transitionally connected by a straight extension part. The steering angle direction B1 of the first bending part 331 is opposite to the steering angle direction B2 of the second bending part 332. The steering angle direction B1 is counterclockwise, and the steering angle direction B2 is clockwise.

[0066] Providing multiple curved portions can more flexibly utilize the internal space of the housing 100 and adapt to different positions of the impeller 210 .

[0067] Figure 8 and Fig. 9 Two embodiments of the heat exchanger 300 are illustrated in the figure. The heat exchanger 300 includes fins 310 and cooling medium pipes 320 inserted and fixed to the fins 310, which are specifically microchannel insert fins. The heat exchanger 300 extends along a smooth curved path as a whole (i.e., the extension trend of the fins). For example, it extends along an arc path as a whole. The curvature radius of the arc path is R, and it satisfies 50mm≤R≤300mm. Specifically, it can be 50mm, 100mm, 200mm, or 300mm. The size of the curvature radius can be determined according to the size of the heat exchange amount. Of course, it should also be combined with the height factor of the shell 100. For example, when the height of the shell 100 remains unchanged, a smaller curvature radius R or the setting of multiple curved parts 330 will enable the heat exchanger 300 to obtain a longer extension path, that is, corresponding to a larger heat exchange area.

[0068] Fig.10 and Fig.11The heat exchanger 300 in the figure also adopts microchannel insert fins, specifically including fins 310 and cooling medium pipelines 320. The fins 310 extend in a straight line or are understood to be in a state before being bent.

[0069] Based on the fan coil units of the above embodiments, an embodiment of the present application further provides an air conditioning system with the fan coil units of the above embodiments, and other components of the air conditioning system can be implemented in combination with the existing technology.

[0070] The fan coil unit and air conditioning system of the present application improve the heat exchanger configuration and further optimize the internal space design of the fan coil unit, which can make the product structure simple and compact. Compared with the existing technology, the overall height can be reduced without changing the heat exchange area, thus adapting to more stringent installation space requirements.

[0071] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. When the technical features in different embodiments are embodied in the same figure, it can be regarded that the figure also discloses the combination examples of the various embodiments involved.

[0072] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A fan coil unit, characterized in that: include: A housing (100), wherein the interior of the housing (100) is a wind chamber (110), and the housing (100) is provided with an air inlet (120) and an air outlet (130) which are in communication with the wind chamber (110); A fan (200) for driving airflow through the air chamber (110); The heat exchanger (300) is located in the wind chamber (110). Along the airflow direction, the heat exchanger (300) is located downstream of the fan (200). The heat exchanger (300) has a smoothly transitioned curved portion (330), and the concave side of the curved portion (330) faces the fan (200).

2. The fan coil unit according to claim 1, characterized in that: The fan (200) is located outside the wind chamber (110), the wind path of the fan (200) is connected to the air inlet (120) of the wind chamber (110), and the minimum distance between the heat exchanger (300) and the air inlet (120) is L, and satisfies 10 mm ≤ L ≤ 150 mm; Or the fan (200) has an impeller (210) located in the wind chamber (110), and along the radial direction of the impeller (210), the minimum distance between the heat exchanger (300) and the impeller (210) is L, and satisfies 10mm≤L≤150mm.

3. The fan coil unit according to claim 2, characterized in that: The height of the wind chamber is H, the diameter of the impeller (210) is D, and D:H=(0.6-0.9):1 is satisfied.

4. The fan coil unit according to claim 2, characterized in that: The heat exchanger (300) semi-surrounds the impeller (210).

5. The fan coil unit according to claim 2, characterized in that: The bending angle of the bending portion (330) is between 30 and 60 degrees; the center of the circle corresponding to the bending portion (330) points to the impeller (210) or the air inlet (120).

6. The fan coil unit according to any one of claims 1 to 5, characterized in that: The heat exchanger (300) extends along a smooth curved path as a whole, or at least a portion thereof extends along a straight path; There are one or more bending parts (330). When there are multiple bending parts (330), the steering angle directions between the multiple bending parts (330) are the same or different.

7. The fan coil unit according to claim 6, characterized in that: The heat exchanger (300) extends as a whole along an arc-shaped path, the curvature radius of the arc-shaped path is R, and satisfies 50 mm ≤ R ≤ 300 mm.

8. The fan coil unit according to claim 1, characterized in that: The heat exchanger (300) comprises one or more working sections, the multiple working sections are integrally structured or spliced ​​with each other, and at least one of the working sections has the curved portion (330); The heat exchanger (300) comprises a fin (310) and a cooling medium pipeline (320) inserted and fixed to the fin (310); the fin (310) has a bending portion (330); and within the same working section, the fin (310) is an integral structure on both sides of the bending portion (330).

9. The fan coil unit according to claim 8, characterized in that: The air outlet (130) is multiple and at least includes: A first air outlet (131) is located on one side of the housing (100) in a horizontal direction; A second air outlet (132) is located on the top side or the bottom side of the housing (100); The heat exchanger (300) comprises at least two working sections, and each working section is respectively configured at a corresponding air outlet (130).

10. An air conditioning system, characterized in that: A fan coil unit according to any one of claims 1 to 9.

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