Air return pipe assembly of dual-system refrigerator

Abstract

The utility model discloses an air return pipe assembly of a dual-system refrigerator, and belongs to the technical field of refrigerator assemblies. Comprising a first air return pipe, a second air return pipe, a first capillary pipe and a second capillary pipe, the second air return pipe is connected between the compressor and the freezing evaporator, the first air return pipe is connected between the freezing evaporator and the refrigeration evaporator, and the outlet end of the first air return pipe and the inlet end of the second air return pipe are parallel and attached to each other; one end of the first capillary tube is parallel to the inlet end of the first air return pipe, the other end of the first capillary tube is parallel to and attached to the outlet end of the second air return pipe, and the second capillary tube is parallel to the outlet end of the second air return pipe from the inlet end of the second air return pipe. The first air return pipe and the second air return pipe are wrapped by aluminum foil adhesive tapes respectively and are connected without welding spots, so that the leakage risk in the box is reduced, and the first air return pipe and the second air return pipe are convenient to assemble, disassemble and maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigerator components, in particular to an air return pipe component of a dual-system refrigerator. Background Art

[0002] The evaporator is one of the important components in the refrigerator refrigeration system. During the refrigerator refrigeration process, the low-temperature condensed liquid passes through the evaporator to exchange heat with the outside air and absorb heat through vaporization to achieve the refrigeration effect. In a dual-system air-cooled refrigerator, there are two evaporators, namely the refrigeration evaporator and the freezing evaporator. Therefore, it is necessary to connect the refrigeration evaporator and the freezing evaporator through a return air pipe.

[0003] At present, the refrigeration evaporator and the freezing evaporator of the dual-system air-cooled refrigerator are connected in series through a three-way pipe on the return air pipe. Usually, the three-way pipe on the return air pipe is made of copper pipe. The three-way pipe adds two welding points on the return air pipe, which increases the leakage rate of the return air pipe. Since the return air pipe is installed in the foaming layer of the refrigerator, it is difficult to find and repair when a welding point leak occurs. Utility Model Content

[0004] The purpose of the utility model is to provide a return air duct assembly for a dual-system refrigerator, aiming to at least solve the technical problems existing in the above-mentioned prior art. To achieve the above-mentioned purpose, the technical solutions adopted by the utility model are as follows:

[0005] A return air duct assembly of a dual-system refrigerator comprises a No. 1 return air duct, a No. 2 return air duct, a No. 1 capillary tube and a No. 2 capillary tube, wherein the No. 2 return air duct is connected between a compressor and a freezing evaporator, the No. 1 return air duct is connected between the freezing evaporator and the refrigeration evaporator, the No. 1 return air duct outlet end is parallel to the No. 2 return air duct inlet end and fits each other, one end of the No. 1 capillary tube is parallel to the No. 1 return air duct inlet end, the other end of the No. 1 capillary tube is parallel to the No. 2 return air duct outlet end and fits each other, and the No. 2 capillary tube extends from the No. 2 return air duct inlet end to the No. 2 return air duct outlet end.

[0006] As a further solution of the utility model: one end of the No. 1 capillary is connected to a No. 1 connecting tube, and the No. 1 connecting tube is parallel to the inlet end of the No. 1 return air pipe and fits each other; one end of the No. 2 capillary is connected to a No. 2 connecting tube, and the No. 2 connecting tube is parallel to the inlet end of the No. 2 return air pipe and fits each other.

[0007] As a further solution of the utility model: a curved section is formed in the middle of the No. 2 air return pipe, the No. 1 capillary tube and the No. 2 capillary tube.

[0008] As a further solution of the utility model: the curved section includes a horizontal U-shaped section and a vertical U-shaped section that are integrally connected.

[0009] As a further solution of the utility model: the No. 1 air return pipe and the No. 2 air return pipe are respectively wrapped with aluminum foil tape.

[0010] As a further solution of the utility model: the exterior of the No. 2 air return pipe, the No. 1 capillary tube and the No. 2 capillary tube parallel section are tightly wrapped with aluminum foil tape.

[0011] The utility model has the following beneficial effects:

[0012] The utility model uses aluminum foil tape to wrap the No. 1 air return pipe and the No. 2 air return pipe respectively, and there is no welding point connection between the No. 1 air return pipe and the No. 2 air return pipe, which not only reduces the risk of leakage in the box, but also facilitates the loading and unloading and maintenance of the No. 1 air return pipe and the No. 2 air return pipe;

[0013] The utility model adopts a method of stacking the horizontal U-shaped section and the vertical U-shaped section around the pipe for the No. 2 return air pipe, the No. 1 capillary tube and the No. 2 capillary tube in the middle parallel section, thereby lengthening the heat exchange length of the No. 2 return air pipe and the No. 1 capillary tube and the No. 2 capillary tube in a limited space, thereby improving the heat exchange performance;

[0014] Since the first capillary tube and the second capillary tube are both slender structures, the first connecting tube and the second connecting tube are provided, and the first capillary tube and the second capillary tube are expanded and transitioned before being connected to the corresponding freezing evaporator and refrigerating evaporator in the refrigerator, thereby improving the convenience of connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings.

[0016] Figure 1 This is a three-dimensional structural diagram of a return air pipe assembly of a dual-system refrigerator of the utility model;

[0017] Figure 2 The utility model is a front schematic diagram of the structure of an air return pipe assembly of a dual-system refrigerator.

[0018] In the figure: 1. Air return pipe No. 1; 2. Air return pipe No. 2; 3. Capillary tube No. 1; 4. Connecting tube No. 1; 5. Capillary tube No. 2; 6. Connecting tube No. 2; 7. Aluminum foil tape. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation. Therefore, it should not be understood as a limitation on the present invention.

[0021] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. 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 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 this utility model can be understood according to specific circumstances.

[0022] Embodiment 1

[0023] See also Figure 1-2 As shown, this embodiment provides a return air pipe assembly of a dual-system refrigerator, including a No. 1 return air pipe 1, a No. 2 return air pipe 2, a No. 1 capillary tube 3 and a No. 2 capillary tube 5. Among them, the No. 1 return air pipe 1 and the No. 2 return air pipe 2 are preferably aluminum tubes, and there is no welding point connection between the two aluminum tube return air pipes, the manufacturing process is simple, and the risk of leakage in the box is reduced. The No. 2 return air pipe 2 is used to connect between the compressor and the freezing evaporator, and the No. 1 return air pipe 1 is used to connect between the freezing evaporator and the refrigeration evaporator to achieve a series connection between the freezing evaporator and the refrigeration evaporator. The outlet end of the No. 1 return air pipe 1 is parallel to the inlet end of the No. 2 return air pipe 2 and fits each other. The No. 1 return air pipe 1 and the No. 2 return air pipe 2 are respectively wrapped with aluminum foil tape 7. There is no welding point connection between the No. 1 return air pipe 1 and the No. 2 return air pipe 2, which not only reduces the risk of leakage in the box, but also facilitates the loading and unloading and maintenance of the No. 1 return air pipe 1 and the No. 2 return air pipe 2. One end of the No. 1 capillary tube 3 is parallel to the inlet end of the No. 1 return air pipe 1, and the other end of the No. 1 capillary tube 3 is parallel to the outlet end of the No. 2 return air pipe 2 and fits each other. The No. 2 capillary tube 5 is parallel from the inlet end of the No. 2 return air pipe 2 to the outlet end of the No. 2 return air pipe 2, and the exterior of the parallel sections of the No. 2 return air pipe 2, the No. 1 capillary tube 3 and the No. 2 capillary tube 5 are tightly wrapped with aluminum foil tape 7, so that the contact area between the No. 1 capillary tube 3, the No. 2 capillary tube 5 and the No. 1 return air pipe 1, the No. 2 return air pipe 2 is maintained as large as possible, so as to achieve a better heat exchange effect.

[0024] Embodiment 2

[0025] See also Figure 1-2As shown, the present embodiment provides a return air duct assembly of a dual-system refrigerator, including a No. 1 return air duct 1, a No. 2 return air duct 2, a No. 1 capillary tube 3 and a No. 2 capillary tube 5, the No. 2 return air duct 2 is connected between the compressor and the freezing evaporator, the No. 1 return air duct 1 is connected between the freezing evaporator and the refrigeration evaporator, the outlet end of the No. 1 return air duct 1 is parallel to the inlet end of the No. 2 return air duct 2 and fits each other, one end of the No. 1 capillary tube 3 is parallel to the inlet end of the No. 1 return air duct 1, the other end of the No. 1 capillary tube 3 is parallel to the outlet end of the No. 2 return air duct 2 and fits each other, and the No. 2 capillary tube 5 is parallel from the inlet end of the No. 2 return air duct 2 to the outlet end of the No. 2 return air duct 2.

[0026] The difference between this embodiment and the first embodiment is that:

[0027] A curved section is formed in the middle of the No. 2 air return pipe 2, the No. 1 capillary tube 3 and the No. 2 capillary tube 5, and the curved section includes a horizontal U-shaped section and a vertical U-shaped section which are integrally connected.

[0028] The parallel section between the No. 2 return air pipe 2, the No. 1 capillary tube 3 and the No. 2 capillary tube 5 is arranged in a stacked manner by means of a horizontal U-shaped section and a vertical U-shaped section, thereby lengthening the heat exchange length between the No. 2 return air pipe 2 and the No. 1 capillary tube 3 and the No. 2 capillary tube 5 within a limited space and improving the heat exchange performance.

[0029] Embodiment 3

[0030] See also Figure 1-2 As shown, the present embodiment provides a return air duct assembly of a dual-system refrigerator, including a No. 1 return air duct 1, a No. 2 return air duct 2, a No. 1 capillary tube 3 and a No. 2 capillary tube 5, the No. 2 return air duct 2 is connected between the compressor and the freezing evaporator, the No. 1 return air duct 1 is connected between the freezing evaporator and the refrigeration evaporator, the outlet end of the No. 1 return air duct 1 is parallel to the inlet end of the No. 2 return air duct 2 and fits each other, one end of the No. 1 capillary tube 3 is parallel to the inlet end of the No. 1 return air duct 1, the other end of the No. 1 capillary tube 3 is parallel to the outlet end of the No. 2 return air duct 2 and fits each other, and the No. 2 capillary tube 5 is parallel from the inlet end of the No. 2 return air duct 2 to the outlet end of the No. 2 return air duct 2.

[0031] The difference between this embodiment and the first or second embodiment is that:

[0032] One end of the No. 1 capillary tube 3 is connected to a No. 1 connecting tube 4, which is parallel to the inlet end of the No. 1 return air pipe 1 and fits each other; one end of the No. 2 capillary tube 5 is connected to a No. 2 connecting tube 6, which is parallel to the inlet end of the No. 2 return air pipe 2 and fits each other. Since the No. 1 capillary tube 3 and the No. 2 capillary tube 5 are both slender structures, the No. 1 connecting tube 4 and the No. 2 connecting tube 6 are provided, and then the corresponding freezing evaporator and refrigeration evaporator in the refrigerator are connected after expansion transition.

[0033] In summary, the utility model embodiment provides a return air duct assembly of a dual-system refrigerator, in which the No. 1 return air duct 1 and the No. 2 return air duct 2 are respectively wrapped with aluminum foil tape 7, and there is no welding point connection between the No. 1 return air duct 1 and the No. 2 return air duct 2, which not only reduces the risk of leakage in the box, but also facilitates the loading, unloading and maintenance of the No. 1 return air duct 1 and the No. 2 return air duct 2; the parallel section between the No. 2 return air duct 2, the No. 1 capillary tube 3 and the No. 2 capillary tube 5 adopts a horizontal U-shaped section and a vertical U-shaped section to overlap the pipe, which lengthens the heat exchange length of the No. 2 return air duct 2 and the No. 1 capillary tube 3 and the No. 2 capillary tube 5 in a limited space, thereby improving the heat exchange performance; since the No. 1 capillary tube 3 and the No. 2 capillary tube 5 are both slender structures, by setting the No. 1 connecting tube 4 and the No. 2 connecting tube 6, they are connected to the corresponding freezing evaporator and refrigeration evaporator in the refrigerator after flaring transition.

[0034] The above detailed description of the preferred embodiments of the utility model should not be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A return air duct assembly for a dual-system refrigerator, characterized in that: The invention comprises a No. 1 air return pipe (1), a No. 2 air return pipe (2), a No. 1 capillary tube (3) and a No. 2 capillary tube (5), wherein the No. 2 air return pipe (2) is connected between the compressor and the freezing evaporator, the No. 1 air return pipe (1) is connected between the freezing evaporator and the refrigeration evaporator, the outlet end of the No. 1 air return pipe (1) is parallel to the inlet end of the No. 2 air return pipe (2) and fits each other, one end of the No. 1 capillary tube (3) is parallel to the inlet end of the No. 1 air return pipe (1), the other end of the No. 1 capillary tube (3) is parallel to the outlet end of the No. 2 air return pipe (2) and fits each other, and the No. 2 capillary tube (5) is parallel from the inlet end of the No. 2 air return pipe (2) to the outlet end of the No. 2 air return pipe (2).

2. The air return duct assembly of a dual-system refrigerator according to claim 1, characterized in that: One end of the No. 1 capillary tube (3) is connected to a No. 1 connecting tube (4), and the No. 1 connecting tube (4) is parallel to and fits with the inlet end of the No. 1 air return tube (1); one end of the No. 2 capillary tube (5) is connected to a No. 2 connecting tube (6), and the No. 2 connecting tube (6) is parallel to and fits with the inlet end of the No. 2 air return tube (2).

3. The air return duct assembly of a dual-system refrigerator according to claim 1, characterized in that: The No. 2 air return pipe (2), the No. 1 capillary tube (3) and the No. 2 capillary tube (5) are all provided with curved sections in the middle.

4. The air return duct assembly of a dual-system refrigerator according to claim 3, characterized in that: The curved section includes a transverse U-shaped section and a vertical U-shaped section which are integrally connected.

5. The air return duct assembly of a dual-system refrigerator according to claim 1, characterized in that: The No. 1 air return pipe (1) and the No. 2 air return pipe (2) are respectively wrapped with aluminum foil tape (7).

6. The air return duct assembly of a dual-system refrigerator according to claim 1, characterized in that: The exterior of the No. 2 air return pipe (2), the No. 1 capillary tube (3) and the parallel section of the No. 2 capillary tube (5) are tightly wrapped with aluminum foil tape (7).

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