Ceiling machine heat exchanger

Abstract

The utility model discloses a ceiling unit heat exchanger, relates to the technical field of air conditioner ceiling units, and can solve the problem of low heat exchange efficiency caused by non-uniform heat exchange in the height direction of a heat exchanger of a traditional ceiling unit. A ceiling machine heat exchanger comprises a plurality of heat exchange pipes and connecting pipes. The heat exchange pipes are evenly distributed in the height direction of the heat exchanger. And the heat exchange tube is bent to define a polygon with an opening. The heat exchanger is divided into a first area and a second area in the height direction. The first region is over the second region. The first area and the second area each comprise a plurality of heat exchange pipes. The heat exchange tube is provided with a first port and a second port. And the connecting pipe can be communicated with any two different heat exchange pipes. By bending the heat exchange tube and reserving the opening, the design that the heat exchange tube is provided with the first port and the second port is achieved, and the flow length can be more diversified.

Description

Technical Field

[0001] This utility model relates to the field of ceiling-mounted air conditioning technology, and in particular to a ceiling-mounted heat exchanger. Background Technology

[0002] With the diversification of air conditioning applications, ceiling-mounted air conditioners are widely used in commercial spaces such as shopping malls, hotels, and offices. Due to their recessed installation, ceiling-mounted units typically employ a four- or multi-sided air outlet design to achieve uniform airflow, using centrifugal fan blades to blow the air out. Therefore, the evaporator is designed with four or more folds, which results in an excessively long refrigerant flow path, leading to reduced evaporator heat exchange efficiency.

[0003] Furthermore, the use of centrifugal fan blades for air delivery results in uneven airflow compared to ceiling-mounted fans, leading to significant differences in heat exchange across different areas along the evaporator's height. Utility Model Content

[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a heat exchanger for ceiling-mounted air conditioners that can solve the problem of low heat exchange efficiency caused by uneven heat exchange in the height direction of traditional ceiling-mounted air conditioners.

[0005] This utility model provides a ceiling-mounted heat exchanger, including a plurality of heat exchange tubes and a connecting pipe. The plurality of heat exchange tubes are evenly distributed along the height direction of the heat exchanger. The heat exchange tubes are bent to form a polygon with an opening. The heat exchanger is divided into a first region and a second region in the height direction. The first region is above the second region. Both the first region and the second region include a plurality of heat exchange tubes. The heat exchange tubes have a first port and a second port. The connecting pipe can connect any two different heat exchange tubes.

[0006] A ceiling-mounted heat exchanger according to an embodiment of the present invention has at least the following beneficial effects: The ceiling-mounted heat exchanger includes a plurality of heat exchange tubes and connecting pipes. The plurality of heat exchange tubes are evenly distributed along the height direction of the heat exchanger. The heat exchange tubes are bent to form polygons with openings. The heat exchanger is divided into a first region and a second region in the height direction. The first region is above the second region. Both the first region and the second region include a plurality of heat exchange tubes. The heat exchange tubes have a first port and a second port. The connecting pipes can connect any two different heat exchange tubes. By bending the heat exchange tubes and leaving openings, the design of having first and second ports on the heat exchange tubes allows for greater diversity in flow lengths.

[0007] According to the present invention, a ceiling-mounted heat exchanger is provided in which the heat exchange tube is bent three times to form a quadrilateral.

[0008] According to the present invention, in a ceiling-mounted heat exchanger, the first port of any heat exchange tube and the first port of any other heat exchange tube are connected by a connecting pipe.

[0009] According to the present invention, in a ceiling-mounted heat exchanger, the first port of the uppermost heat exchange tube in the first region is connected to the first port of the lowermost heat exchange tube in the second region via a connecting pipe.

[0010] According to the present invention, in a ceiling-mounted heat exchanger, the heat exchange tube in the second region has an elliptical cross-section, with its minor axis parallel to the vertical direction.

[0011] According to the present invention, in a ceiling-mounted heat exchanger, the heat exchange tubes in the first and second regions have elliptical cross-sections, with their minor axis direction parallel to the vertical direction.

[0012] According to the present invention, in a ceiling-mounted heat exchanger, the second port is connected to a liquid distribution pipe and a gas collection pipe.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a front view of the present invention.

[0017] Figure 3 This is a sectional view of the heat exchanger installed behind the ceiling machine. Detailed Implementation

[0018] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Reference Figures 1 to 3 A ceiling-mounted heat exchanger includes a plurality of heat exchange tubes 30 and connecting pipes 40. The plurality of heat exchange tubes 30 are evenly distributed along the height direction of the heat exchanger. The heat exchange tubes 30 are bent into polygons with openings.

[0023] The heat exchanger is divided into a first region 10 and a second region 20 in the height direction. The first region 10 is above the second region 20. Both the first region 10 and the second region 20 include a plurality of heat exchange tubes 30. The heat exchange tubes 30 have a first port 31 and a second port 32. A connecting pipe 40 can connect any two different heat exchange tubes 30.

[0024] Understandably, in conventional heat exchanger piping, the heat exchange tube 30 is designed as a long U-tube, with each long U-tube approximately 4m long. Typically, to accommodate both cooling and heating flow paths, one flow path uses two long U-tubes, totaling 8m in length. In this configuration, the refrigerant pipe in the same flow path is a single tube bent into two parallel sections, with the two open ends located at the first end of the evaporator and the bent end at the second end. This type of heat exchange piping leads to multiple heat exchanges of the refrigerant within the same area, resulting in poor heat exchange efficiency. Furthermore, the long flow path reduces the effective heat exchange area of ​​the evaporator. In this embodiment of the invention, by bending the heat exchange tube 30 and leaving openings at both ends, the design of the heat exchange tube 30 having a first port 31 and a second port 32 allows for greater flexibility in flow length.

[0025] Reference Figures 1 to 3The heat exchange tube is bent three times to form a quadrilateral.

[0026] It is understandable that fins are surrounded on both the inner and outer sides of the heat exchange tube 30, and the shape of the fins is consistent with that of the heat exchange tube 30.

[0027] It should be noted that in the attached diagram, the fins are replaced by a frame.

[0028] Reference Figures 1 to 3 The first port 31 of any heat exchange tube 30 and the first port 31 of any other heat exchange tube 30 are connected by a connecting pipe 40.

[0029] Understandably, connecting the two heat exchange tubes 30 via the connecting pipe 40 can increase the flow path length of the refrigerant, ensuring sufficient heat exchange, and also allows for flexible adjustment of the flow path length of the heat exchange tubes. By using U-shaped connecting pipes 40 of different lengths to connect heat exchange tubes 30 at different locations, combined with the refrigerant flow scheme, it is possible to achieve high heat exchange in all areas of the heat exchanger.

[0030] Reference Figures 1 to 3 The first port 31 of the uppermost heat exchange tube 30 in the first region 10 is connected to the first port 31 of the lowermost heat exchange tube 30 in the second region 20 through a connecting pipe 40.

[0031] It should be noted that in conventional ceiling-mounted air conditioners, due to the positive pressure blower method, the air drawn in from the air inlet is blown towards the evaporator under the guidance of the guide ring. However, the area where the air is directed out by the guide ring is concentrated in the first area 10 of the evaporator, while the second area 20 of the evaporator has less airflow due to the presence of the water tray. This results in a significant difference in the heat exchange effect between the upper and lower parts of the evaporator, leading to a difference in the heat exchange capacity between the upper and lower parts of the evaporator. The airflow velocity is faster in the upper part of the evaporator and slower in the heat exchange tubes of the second area 20.

[0032] In order to effectively utilize the high airflow velocity of the air flowing through the upper part of the evaporator, in this embodiment of the utility model, a long U-shaped connecting pipe is used to connect the heat exchange tube 30 in the first region 10 and the heat exchange tube 30 in the second region 20, and the refrigerant is introduced first into the heat exchange tube 30 in the second region 20 and then into the heat exchange tube 30 in the first region 10.

[0033] Because the refrigerant temperature is low at the front end and high at the back end of the pipeline in the same process, and because the refrigerant at the front end of the pipeline is in a region with low wind speed in this embodiment, the refrigerant temperature is low and this region can achieve high heat exchange; the refrigerant at the back end of the pipeline is in a region with high wind speed. With this layout, while ensuring high heat exchange in the low wind speed region, the high wind speed region can also have high heat exchange, thereby achieving high heat exchange in the entire evaporator.

[0034] Reference Figures 1 to 3 In the second region 20, the heat exchange tube 30 has an elliptical cross-section, with its minor axis parallel to the vertical direction.

[0035] Reference Figure 2 It is worth noting that conventional heat exchange tubes are currently circular, which significantly obstructs airflow. In some embodiments of this invention, the influence of the heat exchange tube 30 on airflow is reduced by changing its shape. In this embodiment, the heat exchange tube 30 is changed to an elliptical cross-section, with the minor axis of the ellipse parallel to the vertical direction. This reduces the obstruction of airflow by the heat exchange tube, increases the airflow velocity through the heat exchanger, and thus improves the heat exchange efficiency of the heat exchanger.

[0036] It should be noted that the vertical direction of this application is... Figure 2 The coordinate system in the diagram shows the directions, with the vertical direction being the direction of the upper and lower coordinate systems.

[0037] It is worth noting that in some other embodiments of this utility model, the cross-section of the heat exchange tube 30 in the first region 10 and the second region 20 is elliptical, and its minor axis is parallel to the vertical direction.

[0038] Understandably, all heat exchange tubes 30 use elliptical pipes, which can improve the ventilation and heat exchange efficiency of the first zone 10 and the second zone 20.

[0039] It should be noted that, Figure 2 In the embodiment shown, all heat exchange tubes 30 have an elliptical cross-section. Figure 1 The embodiment shown is one where the heat exchange tube 30 has a circular cross-section. Embodiments where the heat exchange tube 30 in the first region has a circular cross-section and the heat exchange tube 30 in the second region has an elliptical cross-section are not shown in the accompanying drawings.

[0040] It should be noted that, in the embodiments of this utility model, the second port 32 is connected to the liquid distribution pipe and the gas collection pipe.

[0041] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A calandria heat exchanger, characterized by, The heat exchanger comprises several heat exchange tubes (30) and connecting tubes (40), the heat exchange tubes (30) are uniformly distributed along the height direction of the heat exchanger, the heat exchange tubes (30) are bent to form a polygon with an opening, the heat exchanger is divided into a first area (10) and a second area (20) in the height direction, the first area (10) is above the second area (20), and the first area (10) and the second area (20) each comprise several heat exchange tubes (30); The heat exchange tube (30) has a first port (31) and a second port (32); The connecting tube (40) can communicate any two different heat exchange tubes (30).

2. A ceiling-mounted heat exchanger according to claim 1, wherein The heat exchange tube (30) is bent three times to form a quadrilateral.

3. A ceiling-mounted heat exchanger according to claim 1, wherein The first port (31) of any heat exchange tube (30) is communicated with the first port (31) of any other heat exchange tube (30) through the connecting tube (40).

4. A ceiling-mounted heat exchanger according to claim 3, wherein The first port (31) of the uppermost heat exchange tube (30) in the first area (10) is communicated with the first port (31) of the lowermost heat exchange tube (30) in the second area (20) through the connecting tube (40).

5. A ceiling-mounted heat exchanger according to claim 1, wherein The cross section of the heat exchange tube (30) in the second area (20) is an ellipse, and the short axis direction is parallel to the vertical direction.

6. A ceiling-mounted heat exchanger according to claim 1, wherein The cross section of the heat exchange tube (30) in the first area (10) and the second area (20) is an ellipse, and the short axis direction is parallel to the vertical direction.

7. A ceiling-mounted heat exchanger according to claim 1, wherein The second port (32) is connected with a liquid distribution pipe and a gas collecting pipe.

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