Fin type heat exchanger flow path structure suitable for low-temperature EVI heat pump unit

Abstract

The utility model discloses a fin type heat exchanger flow path structure suitable for a low temperature EVI heat pump unit, which comprises a fin type heat exchanger, a liquid pipe and an air pipe, the liquid pipe enters the fin type heat exchanger from the right side and the left side of the fin type heat exchanger through a plurality of first liquid distribution pipes and a plurality of second liquid distribution pipes respectively; the air pipes enter the fin type heat exchanger from the left side and the right side of the fin type heat exchanger through the first air collecting pipes and the second air collecting pipes respectively. By optimizing the pipeline distribution in the fin heat exchanger and changing the flow direction of a circulating refrigerant in part of the branches of the fin heat exchanger, the fin heat exchanger and other branches are mutually and positively influenced, the frosting condition of the fin heat exchanger is delayed, the problem that the running capacity of a heat pump unit is attenuated too fast in winter is effectively solved, and the heat pump unit is protected. And meanwhile, the defrosting efficiency of the fin type heat exchanger is improved during defrosting, the whole machine defrosting time is shortened, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to a fin heat exchanger flow path structure suitable for a low-temperature EVI heat pump unit. Background Art

[0002] When the air source heat pump unit is running in winter, frost will form on the fin heat exchanger on the air side, causing the heating capacity of the unit to gradually decay, thus affecting the unit's operating performance and user experience.

[0003] In order to prevent the above problems, existing low-temperature air source heat pump units often adopt a solution to optimize the defrost judgment conditions, so that the heat pump unit enters the defrost mode as early as possible to remove the frost on the fin heat exchanger. However, this solution has a disadvantage, that is, the unit will frequently enter defrost mode under low temperature and high humidity conditions, which still affects the user experience. Utility Model Content

[0004] In view of the above problems, the utility model provides a fin heat exchanger flow path structure suitable for a low-temperature EVI heat pump unit, which effectively solves the problems pointed out in the background technology.

[0005] The technical solution adopted by the utility model is:

[0006] A fin heat exchanger flow path structure suitable for a low-temperature EVI heat pump unit includes a fin heat exchanger, a liquid pipe and an air pipe. The liquid pipe enters the fin heat exchanger from the right side and the left side of the fin heat exchanger through a plurality of first liquid distribution pipes and a plurality of second liquid distribution pipes respectively, and the air pipe enters the fin heat exchanger from the left side and the right side of the fin heat exchanger through a plurality of first gas collecting pipes and a plurality of second gas collecting pipes respectively.

[0007] Preferably, the first liquid distribution pipe and the second gas collecting pipe are spaced apart and distributed inside the fin heat exchanger.

[0008] Preferably, the second liquid distribution pipe and the first gas collecting pipe are distributed at intervals inside the fin heat exchanger.

[0009] The first liquid distribution pipe and the second air collecting pipe, the second liquid distribution pipe and the first air collecting pipe are distributed at intervals, so that the first liquid distribution pipe and the second air collecting pipe, the second liquid distribution pipe and the first air collecting pipe achieve the best positive influence effect. During heating, since the refrigerant temperature in the air collecting pipe is higher than that in the liquid distribution pipe, the refrigerants in the liquid distribution pipe and the air collecting pipe influence each other at both ends of the fin heat exchanger, that is, the refrigerant in the second air collecting pipe increases the temperature of the refrigerant in the first liquid distribution pipe, and the refrigerant in the first air collecting pipe increases the temperature of the refrigerant in the second liquid distribution pipe, resulting in an increase in the temperature of the refrigerant in the entire fin heat exchanger, which can effectively delay the frosting of the fin heat exchanger. During defrosting, since the entire fin heat exchanger is frosted, the high-temperature refrigerant enters from both ends of the fin heat exchanger through the first air collecting pipe and the second air collecting pipe at the same time, which can improve the defrosting efficiency of the fin heat exchanger, reduce the defrosting time of the whole machine, and improve the user experience.

[0010] The utility model optimizes the distribution of pipes in the fin heat exchanger, changes the flow direction of the circulating refrigerant in some branches of the fin heat exchanger, makes them have a positive influence on other branches, delays the frosting of the fin heat exchanger, and effectively solves the problem of rapid attenuation of the operating capacity of the heat pump unit in winter. At the same time, it improves the defrosting efficiency of the fin heat exchanger during defrosting, reduces the defrosting time of the whole machine, and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0012] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0013] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0014] In addition, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0015] 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 one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0016] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0018] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0019] like Figure 1As shown, a fin heat exchanger flow path structure suitable for a low-temperature EVI heat pump unit includes a fin heat exchanger 1, a liquid pipe 2 and an air pipe 3. The liquid pipe 2 enters the fin heat exchanger 1 from the right and left sides of the fin heat exchanger 1 through a plurality of first liquid distribution pipes 21 and a plurality of second liquid distribution pipes 22 respectively, and the air pipe 3 enters the fin heat exchanger 1 from the left and right sides of the fin heat exchanger 1 through a plurality of first air collecting pipes 31 and a plurality of second air collecting pipes 32 respectively.

[0020] The first liquid distribution pipe 21 and the second gas collecting pipe 32 are spaced apart and distributed inside the fin heat exchanger 1 .

[0021] The second liquid distribution pipe 22 and the first gas collecting pipe 31 are distributed at intervals inside the fin heat exchanger 1 .

[0022] The working principle of this utility model:

[0023] During heating: the liquid refrigerant after releasing heat in the liquid pipe 2 enters the fin heat exchanger 1 in two ways, the first way enters from the right side of the fin heat exchanger 1 through the first liquid distribution pipe 21, and the second way enters from the fin heat exchanger through the second liquid distribution pipe 22. The refrigerant absorbs heat in the fin heat exchanger 1 and becomes a gaseous refrigerant, and leaves the fin heat exchanger 1 in two ways to enter the air pipe 3. The first way leaves the fin heat exchanger 1 from the left side of the fin heat exchanger 1 through the first gas collecting pipe 31 and enters the air pipe 3, and the second way leaves the fin heat exchanger 1 from the right side of the fin heat exchanger 1 through the second gas collecting pipe 32 and enters the air pipe. The refrigerant temperature in the collecting pipe 31 and the second collecting pipe 32 is relatively high, and the refrigerant temperature in the first liquid distribution pipe 21 and the second liquid distribution pipe 22 is relatively low. When the refrigerant in the first liquid distribution pipe 21 enters the fin heat exchanger 1, it is positively affected by the high-temperature refrigerant in the second collecting pipe 32, and its temperature is increased. Similarly, when the refrigerant in the second liquid distribution pipe 22 enters the fin heat exchanger 1, it is positively affected by the high-temperature refrigerant in the first collecting pipe 31, and its temperature is increased, thereby increasing the temperature of the refrigerant in the entire fin heat exchanger, which can effectively delay the frosting of the fin heat exchanger.

[0024] During defrosting: the high-temperature gaseous refrigerant in the air pipe 3 enters the fin heat exchanger 1 in two ways, the first way enters from the left side of the fin heat exchanger 1 through the first collecting pipe 31, and the second way enters from the right side of the fin heat exchanger 1 through the second collecting pipe 32. Since the entire fin heat exchanger 1 is frosted, the flow path structure in which the high-temperature gaseous refrigerant enters from the left and right sides at the same time can improve the defrosting efficiency of the fin heat exchanger 1, reduce the defrosting time of the whole machine, and improve the user experience.

[0025] Finally, it should be noted that the above examples are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and there are many variations. All variations that can be directly derived or associated with the content disclosed by a person skilled in the art from the present invention should be considered as the protection scope of the present invention.

Claims

1. A fin heat exchanger flow path structure suitable for a low-temperature EVI heat pump unit, characterized in that: The invention comprises a fin heat exchanger (1), a liquid pipe (2) and an air pipe (3); the liquid pipe (2) enters the fin heat exchanger (1) from the right side and the left side of the fin heat exchanger (1) respectively through a plurality of first liquid distribution pipes (21) and a plurality of second liquid distribution pipes (22); and the air pipe (3) enters the fin heat exchanger (1) from the left side and the right side of the fin heat exchanger (1) respectively through a plurality of first air collecting pipes (31) and a plurality of second air collecting pipes (32).

2. A fin heat exchanger flow path structure suitable for a low-temperature EVI heat pump unit according to claim 1, characterized in that: The first liquid distribution pipe (21) and the second gas collecting pipe (32) are distributed at intervals inside the fin heat exchanger (1).

3. The fin heat exchanger flow path structure suitable for a low-temperature EVI heat pump unit according to claim 1, characterized in that: The second liquid distribution pipe (22) and the first gas collecting pipe (31) are distributed at intervals inside the fin heat exchanger (1).

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