Refrigerant filling structure and household appliance

Abstract

The utility model provides a refrigerant filling structure and a household electrical appliance, the refrigerant filling structure comprises a filling structure connected to a pipeline used for circulating refrigerant, the filling structure is used for filling the refrigerant into the pipeline, and a fixing device is respectively connected with the pipeline and the filling structure. According to the utility model, the fixing device is arranged between the pipeline for circulating the refrigerant and the filling structure for filling the refrigerant into the pipeline, so that the relative positions of the pipeline and the filling structure can be limited, the fixing strength of the filling structure is improved, and meanwhile, the size of the filling structure is favorably reduced, and therefore, in the transportation process, the transportation efficiency is improved. The situation that the filling structure is broken due to shaking is avoided, particularly, the situation that the connecting position between the filling structure and the pipeline is broken due to shaking is avoided, the working stability of the refrigerant filling structure is improved, and the service life of the refrigerant filling structure is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat pump refrigerant filling, in particular to a refrigerant filling structure, and also to a household appliance equipped with the refrigerant filling structure. Background Art

[0002] At present, the method of charging refrigerant and evacuating the external units such as heat pumps and air conditioners is to connect a pipe to the collecting pipe or other pipelines of the fin heat exchanger, connect the other end of the pipe to a stop valve, and charge the refrigerant through the stop valve and the pipe.

[0003] For example, Chinese utility model patent application number CN201410075888.5 discloses an air conditioner with low-pressure refrigerant filling, in which a refrigerant filling pipeline is connected to a refrigerant pipe on the suction side of a compressor.

[0004] However, the existing installation method of charging refrigerant pipeline is to fix the stop valve to a certain position of the machine through a stop valve bracket, usually at a position such as the chassis or the middle partition, or to erect a sheet metal bracket on a sheet metal of the unit to fix the stop valve. This solution requires a long pipe, occupies a large space in the machine, and has the risk of breaking due to shaking during transportation.

[0005] Therefore, designing a refrigerant filling structure that can ensure that the pipeline is firmly fixed and avoid the breakage of the connecting pipe due to shaking has become a technical problem that needs to be solved urgently by technical personnel in this field.

[0006] In view of this, the present utility model is proposed. Utility Model Content

[0007] The utility model provides a refrigerant filling structure, which solves the problem that the existing refrigerant filling pipeline is easily broken due to shaking by arranging a fixing device between a pipeline for circulating refrigerant and a filling structure for filling the pipeline with refrigerant.

[0008] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0009] A refrigerant filling structure comprises a filling structure connected to a pipeline for circulating refrigerant, the filling structure is used to fill the refrigerant into the pipeline, and a fixing device is respectively connected to the pipeline and the filling structure.

[0010] Furthermore, the fixing device is arranged near the connection between the pipeline and the filling structure.

[0011] Preferably, the outlet of the filling structure is fixedly connected to the pipeline, and the fixing device is connected between the pipeline and the inlet of the filling structure.

[0012] Further, the filling structure includes:

[0013] A filling pipe, a first end of which is connected to the pipeline and communicates with the pipeline;

[0014] A filling switch connected to the second end of the filling pipe;

[0015] The fixing device connects the pipeline to the filling switch, and / or the fixing device connects the pipeline to the second end of the filling pipe.

[0016] Preferably, both ends of the filling pipe are respectively welded and fixed to the pipeline and the filling switch;

[0017] Preferably, the filling switch comprises a shut-off valve or a pressure switch.

[0018] Further, the fixing device comprises:

[0019] The first connecting part is sleeved on the pipeline;

[0020] The second connecting portion extends outward from the side of the first connecting portion and is connected to an end of the filling structure away from the pipeline.

[0021] Further, the first connecting portion is annular and clamped on the pipeline;

[0022] The second connection part is provided with an annular pressure profile, which is clamped on the filling pipe and / or the filling switch, and / or the second connection part is provided with a mounting seat, and the filling switch is mounted on the mounting seat.

[0023] Further, the first connecting portion includes a metal plate bent into a ring shape, and the second connecting portion includes a first extension plate and a second extension plate extending outwards from two ends of the metal plate close to each other;

[0024] Corresponding arc-shaped profiles are arranged in the middle of the first extension plate and the second extension plate, and the two arc-shaped profiles are interlocked to form an annular profile; and / or, a mounting seat is arranged on the first extension plate and / or the second extension plate, and the mounting flange of the charging switch is fixed on the mounting seat.

[0025] Furthermore, the first extension plate and the second extension plate extend tangentially along the pipeline, the first extension plate is arranged on the inner side of the second extension plate, and the mounting seat is arranged at the side where the first extension plate intersects with the first connecting portion, and bends and extends in a direction away from the second extension plate.

[0026] Further, the end of the mounting seat is provided with a first reinforcing folded edge arranged opposite to the second connecting portion; and / or,

[0027] A second reinforcing folded edge is disposed at a side edge where the second extension plate intersects the first connecting portion and is bent and extended in a direction away from the first extension plate.

[0028] Furthermore, the first extension plate and the second extension plate are connected via a connecting piece.

[0029] Preferably, the first extension plate and the second extension plate are respectively provided with first mounting holes and second mounting holes corresponding to each other.

[0030] The first mounting hole is set as a threaded hole, and the connecting member passes through the second mounting hole and is screwed into the first mounting hole; or the second mounting hole is a threaded hole, and the connecting member passes through the first mounting hole and is screwed into the second mounting hole.

[0031] The utility model also provides a household appliance, comprising a housing and a heat pump system installed in the housing, wherein the above-mentioned refrigerant filling structure is arranged on a pipeline upstream of a compressor of the heat pump system.

[0032] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0033] 1. The utility model provides a fixing device between a pipeline for circulating refrigerant and a filling structure for filling the pipeline with refrigerant, thereby limiting the relative position of the pipeline and the filling structure, improving the fixing strength of the filling structure and helping to reduce the size of the filling structure. Thus, during transportation, the filling structure can be prevented from being broken due to shaking, especially the connection between the filling structure and the pipeline can be prevented from being broken due to shaking, thereby improving the working stability and service life of the refrigerant filling structure.

[0034] 2. The utility model can increase the supporting strength of the fixing device and prevent the fixing device from being deformed during use by arranging the first reinforcing folded edge and the second reinforcing folded edge on the second connecting portion.

[0035] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work. In the accompanying drawings:

[0037] Figure 1 This is a schematic diagram of the installation structure of the refrigerant filling structure in the embodiment of the utility model;

[0038] Figure 2 This is a schematic diagram of the structure of the fixing device in the embodiment of the utility model;

[0039] Figure 3 It is a structural schematic diagram of another perspective of the fixing device in the embodiment of the utility model;

[0040] Figure 4 This is a schematic diagram of the structure of the filling switch in the embodiment of the utility model;

[0041] Figure 5 This is a schematic diagram of the structure of the pipeline in the embodiment of the utility model;

[0042] Figure 6 It is a schematic diagram of the structure of the filling pipe in the embodiment of the utility model.

[0043] Description of the main components in the figure:

[0044] 1. Pipeline; 2. Filling structure; 21. Filling pipe; 22. Filling switch; 221. Mounting flange; 3. Fixing device; 31. First connecting part; 311. Hollow opening; 32. Second connecting part; 321. First extension plate; 322. Second extension plate; 323. Mounting seat; 324. First reinforcing folded edge; 325. Second reinforcing folded edge; 326. Raised portion; 327. First mounting hole; 328. Second mounting hole.

[0045] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0047] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] Embodiment 1

[0050] like Figures 1 to 6 As shown, in an embodiment of the utility model, a refrigerant filling structure is introduced, and the refrigerant filling structure includes a filling structure 2, and the filling structure 2 is connected to a pipeline 1 for circulating the refrigerant therein, and the filling structure 2 is used to fill the refrigerant into the pipeline 1.

[0051] The refrigerant charging structure further includes a fixing device 3 connected between a pipeline 1 for circulating the refrigerant and a charging structure 2 for charging the refrigerant into the pipeline 1 .

[0052] In the present embodiment, by providing a fixing device 3 between the pipeline 1 for circulating the refrigerant and the filling structure 2 for filling the refrigerant into the pipeline 1, the relative position of the pipeline 1 and the filling structure 2 can be limited, thereby improving the fixing strength of the filling structure 2. At the same time, it is helpful to reduce the size of the filling structure 2, thereby avoiding the breakage of the filling structure 2 due to shaking during transportation, especially avoiding the breakage of the connection position between the filling structure 2 and the pipeline 1, thereby improving the working stability and service life of the refrigerant filling structure.

[0053] Preferably, in this embodiment, the fixing device 3 is connected near the connection between the pipeline 1 and the filling structure 2, so that the installation of the filling structure 2 can be reinforced near the connection between the filling structure 2 and the pipeline 1, further avoiding breakage of the connection between the filling structure 2 and the pipeline 1.

[0054] Preferably, the outlet of the filling structure 2 is fixedly connected to the pipeline 1 , and the fixing device 3 is connected between the pipeline 1 and the inlet of the filling structure 2 .

[0055] In some specific embodiments, the filling structure 2 includes a filling tube 21 and a filling switch 22 , wherein a first end of the filling tube 21 is connected to the pipeline 1 and communicates with the pipeline 1 , and the filling switch 22 is connected to a second end of the filling tube 21 .

[0056] In this embodiment, the fixing device 3 is connected between the pipeline 1 and the filling switch 22 , and / or the fixing device 3 is connected between the pipeline 1 and the filling pipe 21 .

[0057] Specifically, in this embodiment, the fixing device 3 includes a first connecting portion 31 sleeved on the pipeline 1, and a second connecting portion 32 extending outward from a side of the first connecting portion 31 and connected to an end of the filling structure 2 away from the pipeline 1.

[0058] In this embodiment, the first connection portion 31 is annular and clamped on the pipeline 1. The second connection portion 32 is provided with an annular pressure profile, which is clamped on the filling pipe 21 and / or the filling switch 22, and / or the second connection portion 32 is provided with a mounting seat 323, and the filling switch 22 is fixed on the mounting seat 323.

[0059] In some possible embodiments, the second connection portion 32 is provided with an annular pressure profile, and the second connection portion 32 is clamped on the filling pipe 21 and / or the filling switch 22 through the annular pressure profile.

[0060] Specifically, Figure 3 and Figure 4 As shown, the first connection part 31 includes a bent metal plate, which is bent into a ring shape. The ring-shaped metal plate is arranged around the pipeline 1 and clamped on the pipeline 1. The second connection part 32 includes a first extension plate 321 and a second extension plate 322 extending outward from two ends of the metal plate that are close to each other, and the first extension plate 321 and the second extension plate 322 are in contact with each other.

[0061] Preferably, in this embodiment, the metal plate is provided with a plurality of hollow openings 311 arranged along the length direction of the metal plate to facilitate bending of the metal plate.

[0062] The middle parts of the first extension plate 321 and the second extension plate 322 are provided with corresponding arc-shaped pressed parts, and the two arc-shaped pressed parts are buckled and clamped on the filling pipe 21 and / or the filling switch 22.

[0063] In some specific embodiments, the arc-shaped pressed parts on the first extension plate 321 and the second extension plate 322 are semicircular, protruding and extending in directions away from each other, and one side of the openings of the two semicircular arc-shaped pressed parts correspond to each other.

[0064] The shapes of the two semicircular arc-shaped profiles are adapted to the shape of the second end of the filling tube 21 , and the two semicircular arc-shaped profiles are interlocked to clamp the second end of the filling tube 21 between the first extension plate 321 and the second extension plate 322 .

[0065] Alternatively, the shape of the two semicircular arc-shaped pressure profiles is adapted to the shape of one end of the filling switch 22 connected to the filling tube 21, and the two semicircular arc-shaped pressure profiles are interlocked to clamp part of the structure of the filling switch 22 between the first extension plate 321 and the second extension plate 322.

[0066] Alternatively, along the extension direction of the filling structure 2, the second connection portion 32 is provided with a first pressure profile adapted to the second end of the filling tube 21 and a second pressure profile adapted to the shape of one end of the filling switch 22 connected to the filling tube 21 in sequence, the first pressure profile and the second pressure profile are formed by the first extension plate 321 and the second extension plate 322, and the first extension plate 321 and the second extension plate 322 simultaneously clamp the filling tube 21 and the filling switch 22. Thus, the connection between the filling tube 21 and the filling switch 22 can be further reinforced.

[0067] In some other possible embodiments, a mounting seat 323 is provided on the second connecting portion 32 , and the filling switch 22 is fixed on the mounting seat 323 .

[0068] Specifically, a mounting seat 323 is extended from the first extension plate 321 and / or the second extension plate 322 , and the charging switch 22 is fixed on the mounting seat 323 .

[0069] In some specific embodiments, the second connection portion 32 is in the shape of a plate extending outward from the side of the first connection portion 31, and a mounting seat 323 is provided at the side where the second connection portion 32 intersects with the first connection portion 31. The mounting seat 323 is bent and extended in a direction perpendicular to the second connection portion 32, and the filling switch 22 is fixed on the mounting seat 323.

[0070] Specifically, the mounting base 323 includes a first part and a second part spaced apart along the side of the second connecting portion 32, the first part and the second part bend and extend toward the same side of the second connecting portion 32, and the two ends of the mounting flange 221 of the filling switch 22 are respectively connected to the first part and the second part, and the interface on the filling switch 22 connected to the filling pipe 21 corresponds to the space between the first part and the second part.

[0071] In this embodiment, the first part and the second part of the mounting seat 323 can be both arranged on the first extension plate 321 of the second connecting portion 32, or both arranged on the second extension plate 322 of the second connecting portion 32, or respectively arranged on the first extension plate 321 and the second extension plate 322.

[0072] The mounting flange 221 is connected to the first portion and the second portion of the mounting seat 323 by screws respectively.

[0073] In this embodiment, the second connecting portion 32 may be provided with a press profile only for clamping the filling structure 2, or may be provided with a mounting seat 323 only for installing the filling switch 22, or may be provided with both a press profile for clamping the filling structure 2 and a mounting seat 323 for reinforcing the filling switch 22.

[0074] In this embodiment, the filling switch 22 may be a stop valve or a pressure switch. Specifically, the filling switch 22 may be an L-shaped pressure switch. In this embodiment, the filling switch 22 is described as a stop valve.

[0075] In this embodiment, the installation seat 323 only used for installing the stop valve is taken as an example for description.

[0076] like Figures 1 to 3 As shown, in this embodiment, the first extension plate 321 and the second extension plate 322 extend tangentially along the pipeline 1, the first extension plate 321 is arranged on the inner side of the second extension plate 322, and the mounting seat 323 is arranged at the side where the first extension plate 321 intersects with the first connecting portion 31, and bends and extends in a direction away from the second extension plate 322.

[0077] like Figure 2 and Figure 3 As shown, in this embodiment, the first extension plate 321 is arranged on the inner side of the second extension plate 322. Specifically, the first extension plate 321 is arranged on the side of the second extension plate 322 close to the pipeline 1, and an acute angle is formed between the first extension plate 321 and the end of the metal plate, and an obtuse angle is formed between the second extension plate 322 and the end of the metal plate.

[0078] In this embodiment, the shape of the filling pipe 21 can be any shape, and the extension direction of the mounting seat 323 provided on the first extension plate 321 is perpendicular to the second end of the filling pipe 21 to ensure that the mounting flange 221 of the stop valve can fit with the mounting seat 323. The structure and model of the second connecting portion 32 are adapted to the extension mode of the filling structure 2 to ensure the fixation of various filling structures 2.

[0079] Preferably, in this embodiment, the second end of the filling tube 21 is parallel to the pipeline 1, the second connecting portion 32 extends in a direction perpendicular to the pipeline 1, and the mounting seat 323 is arranged on the side of the first extension plate 321 perpendicular to the extension direction of the pipeline 1.

[0080] Further preferably, in this embodiment, the first end of the filling tube 21 is perpendicular to the pipeline 1, the second end of the filling tube 21 is parallel to the pipeline 1, and the middle part of the filling tube 21 is set to a smoothly transition arc.

[0081] Specifically, in this embodiment, a portion of the first extension plate 321 between the first portion and the second portion is provided with a protrusion 326 , and the protrusion 326 extends in a direction parallel to the extension direction of the pipeline 1 , thereby increasing the strength of the second connection portion 32 .

[0082] Preferably, in this embodiment, the end surface of the protrusion 326 is flush with the end surface of the mounting seat 323 for connecting to the mounting flange 221, and the protrusion 326 abuts against the mounting flange 221, thereby further improving the stability of the installation of the filling structure 2.

[0083] Preferably, in this embodiment, the end of the mounting seat 323 is provided with a first reinforcing folded edge 324 arranged opposite to the second connecting portion 32; and / or, a second reinforcing folded edge 325 bent and extended in a direction away from the first extension plate 321 is provided at the side where the second extension plate 322 intersects with the first connecting portion 31.

[0084] The provision of the first reinforcing folded edge 324 and the second reinforcing folded edge 325 can further increase the strength of the fixing device 3 and prevent it from being deformed.

[0085] In this embodiment, the first extension plate 321 and the second extension plate 322 are connected by a connector, so that the first connection part 31 clamps the pipeline 1, the second connection part 32 clamps the filling structure 2, and / or the structure of the second connection part 32 is stable.

[0086] Preferably, the first extension plate 321 and the second extension plate 322 are respectively provided with a first mounting hole 327 and a second mounting hole 328 corresponding to each other.

[0087] Specifically, the first mounting hole 327 is set as a threaded hole, and the connecting piece passes through the second mounting hole 328 and is tightened in the first mounting hole 327; or, the second mounting hole 328 is a threaded hole, and the connecting piece passes through the first mounting hole 327 and is tightened in the second mounting hole 328.

[0088] Preferably, in this embodiment, two groups of mounting holes are provided on the second connection portion 32, the first group of mounting holes includes at least one group of first mounting holes 327 and second mounting holes 328 corresponding to each other, wherein the first mounting holes 327 are threaded holes; the second group of mounting holes includes at least one group of first mounting holes 327 and second mounting holes 328 corresponding to each other, wherein the second mounting holes 328 are threaded holes. Thus, it is convenient for operators to install from both sides of the second connection portion 32.

[0089] Preferably, in this embodiment, the first group of mounting holes and the second group of mounting holes respectively include at least two groups of first mounting holes 327 and second mounting holes 328 corresponding to each other.

[0090] Preferably, in this embodiment, both ends of the filling pipe 21 are respectively welded and fixed to the pipeline 1 and the filling switch 22 .

[0091] In this embodiment, the fixing device 3 is an integrally formed sheet metal part.

[0092] In this embodiment, according to the outer diameter of the pipeline 1, fixing devices 3 of different specifications can be configured to adapt to different installation situations.

[0093] Embodiment 2

[0094] In this embodiment, a household appliance is disclosed, which includes a housing and a heat pump system installed in the housing. The heat pump system includes a compressor, a condenser, an expansion valve and an evaporator, and a refrigerant circulates among the compressor, the condenser, the expansion valve and the evaporator.

[0095] The heat pump system is provided with the refrigerant filling structure in the above-mentioned embodiment 1.

[0096] Preferably, in this embodiment, the refrigerant charging structure is arranged upstream of the compressor. The charging structure 2 of the refrigerant charging structure is connected to the pipeline 1 upstream of the compressor of the heat pump system.

[0097] In this embodiment, the household appliance may be a water heater or an air conditioner.

[0098] The above is only a preferred embodiment of the present invention, and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents suggested above without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the present invention.

Claims

1. A refrigerant filling structure, comprising a filling structure (2) connected to a pipeline (1) for circulating refrigerant, the filling structure (2) being used to fill the refrigerant into the pipeline (1), characterized in that: A fixing device (3) is connected to the pipeline and the filling structure respectively.

2. The refrigerant charging structure according to claim 1, characterized in that: The fixing device (3) is arranged near the connection between the pipeline (1) and the filling structure (2).

3. The refrigerant charging structure according to claim 2, characterized in that: The filling structure (2) comprises: A filling pipe (21), a first end of which is connected to the pipeline (1) and communicates with the pipeline (1); A filling switch (22) connected to the second end of the filling pipe (21); The fixing device (3) connects the pipeline (1) and the filling switch (22), and / or the fixing device (3) connects the pipeline (1) and the second end of the filling pipe (21).

4. The refrigerant charging structure according to any one of claims 1 to 3, characterized in that: The fixing device (3) comprises: A first connecting portion (31) is clamped on the pipeline (1); The second connecting portion (32) extends outward from the side of the first connecting portion (31) and is connected to an end of the filling structure (2) away from the pipeline (1).

5. The refrigerant charging structure according to claim 4, characterized in that: The first connecting portion (31) is annular and is clamped on the pipeline (1); The second connecting portion (32) is provided with an annular pressure profile, which is clamped on the filling pipe (21) and / or the filling switch (22), and / or the second connecting portion (32) is provided with a mounting seat (323), and the filling switch (22) is mounted on the mounting seat (323).

6. The refrigerant charging structure according to claim 5, characterized in that: The first connecting portion (31) comprises a metal plate bent into a ring shape, and the second connecting portion (32) comprises a first extension plate (321) and a second extension plate (322) respectively extending outward from two ends of the metal plate close to each other; A corresponding arc-shaped profile is provided in the middle of the first extension plate (321) and the second extension plate (322), and the two arc-shaped profiles are interlocked to form an annular profile; and / or a mounting seat (323) is provided on the first extension plate (321) and / or the second extension plate (322), and a mounting flange (221) of the charging switch (22) is fixed on the mounting seat (323).

7. The refrigerant charging structure according to claim 6, characterized in that: The first extension plate (321) and the second extension plate (322) extend in a tangential direction of the pipeline (1); the first extension plate (321) is arranged on the inner side of the second extension plate (322); the mounting seat (323) is arranged at the side where the first extension plate (321) intersects with the first connecting portion (31), and is bent and extended in a direction away from the second extension plate (322).

8. The refrigerant charging structure according to claim 7, characterized in that: The end of the mounting seat (323) is provided with a first reinforcing folded edge (324) arranged opposite to the second connecting portion (32); and / or, A second reinforcing folded edge (325) is provided at the side where the second extension plate (322) intersects with the first connecting portion (31) and is bent and extended in a direction away from the first extension plate (321).

9. The refrigerant charging structure according to claim 8, characterized in that: The first extension plate (321) and the second extension plate (322) are connected via a connecting piece.

10. A household appliance comprising a housing and a heat pump system installed in the housing, characterized in that: A refrigerant charging structure as claimed in any one of claims 1 to 9 is provided on a pipeline (1) upstream of a compressor of a heat pump system.

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