Pipeline structure for cleaning machine and cleaning machine

Abstract

The pipeline structure comprises a water pipe, a water inlet is formed in the lower end of the water pipe, a water outlet is formed in the upper portion of the water pipe, the cross sectional area of the water pipe for supplying water flow to the water outlet at the upstream of the water outlet is S, the output water flow of the water outlet is Q, and (Q / S) 2 is larger than or equal to 0.05 and smaller than or equal to 0.2. According to the calculation principle of the pipeline head loss in the pipeline design, under the condition of certain flow, the larger the sectional area of the pipeline is, the smaller the flow speed is, the smaller the kinetic energy loss when the kinetic energy of water is converted into pressure energy is, but if the sectional area of the pipeline is too large, the larger the water storage amount of the pipeline is, the pipeline parameter is designed to be larger than or equal to 0.05 and smaller than or equal to 0.2, and the pipeline head loss is not larger than 0.05 and smaller than or equal to 0.2. The loss of the pipeline is effectively reduced, and low water stored in the pipeline can be maintained, so that the hydraulic output effect at the water outlet of the water pipe is improved.

Description

Technical Field

[0001] This utility model relates to the field of dishwasher technology, specifically to a pipeline structure for a cleaning machine and a cleaning machine. Background Technology

[0002] As people's living standards continue to improve, dishwashers, as a type of kitchen appliance, are increasingly entering households.

[0003] The applicant's earlier application CN202510031269.4, "A Cleaning Machine and Cleaning Method," discloses a structure comprising a housing, an inner water pipe, a middle spray arm, and a top spray arm. The lower end of the inner water pipe is connected to a water pump outlet, the middle part of the inner water pipe is connected to the middle spray arm, and the upper end of the inner water pipe is connected to the top spray arm, thereby directing water from the water pump outlet through the middle spray arm and the top spray arm to form sprays at different positions and directions.

[0004] For the aforementioned internal water pipes, the industry typically matches the pipe structure to the water pump's design parameters. However, the structural parameters of the internal water pipes actually have a significant impact on the water flow delivery effect. In particular, the introduction of new industry standards has imposed substantial restrictions on the water efficiency and energy efficiency of dishwashers. Existing internal water pipes lack design-specific features, leading to pipe losses, water retention issues, and consequently poor hydraulic output, which urgently need to be addressed. Utility Model Content

[0005] The first technical problem to be solved by this utility model is to provide a pipeline structure for a cleaning machine that can effectively reduce pipeline loss and water retention and improve hydraulic output, in light of the current state of the technology.

[0006] The second technical problem to be solved by this utility model is to provide a cleaning machine with the above-mentioned pipeline structure, in view of the current situation of the prior art.

[0007] The technical solution adopted by this utility model to solve at least one of the above-mentioned technical problems is as follows:

[0008] A piping structure for a cleaning machine includes a water pipe with an inlet at the lower end and an outlet at the upper end. The cross-sectional area of ​​the water pipe upstream of the outlet is S, and the output water flow rate of the outlet is Q. Therefore, 0.05 ≤ (Q / S). 2 ≤0.2.

[0009] According to the calculation principle of pipeline head loss in pipeline design, under the condition of constant flow rate, the larger the cross-sectional area of ​​the pipeline, the lower the flow velocity, and the smaller the kinetic energy loss when the kinetic energy of water is converted into pressure energy. However, if the cross-sectional area of ​​the pipeline is too large, the pipeline will have a large water storage capacity. This utility model designs the pipeline parameters as 0.05≤(Q / S). 2With a value of ≤0.2, the pipeline loss is effectively reduced, and a low water level is maintained in the pipeline, thereby improving the hydraulic output effect at the water outlet.

[0010] Preferably, the water pipe has a first outlet in the middle and a second outlet at the top. The water pipe includes a lower section below the first outlet and an upper section between the first and second outlets. The output water flow rate of the first outlet is Q1, the output water flow rate of the second outlet is Q2, and the cross-sectional area of ​​the lower section is S. 下 Then 0.05 ≤ [(Q1+Q2) / S 下 ] 2 ≤0.2. The first water outlet is connected to the middle spray arm and the second water outlet is connected to the top spray arm to meet the washing needs of large-capacity dishwashers. In actual production, Q1 and Q2 are fixed for a specific capacity dishwasher. Based on this, the cross-sectional area of ​​the lower section of the water pipe supplying water to both is designed to reduce pipe loss and water retention in the lower section, ensuring that both the middle and top spray arms achieve high hydraulic output.

[0011] Preferably, the cross-sectional area of ​​the upper segment is S. 上 Then 0.05 ≤ (Q2 / S) 上 ) 2 ≤0.2. The upper section of the water pipe supplies water only to the top spray arm. This design reduces pipe losses and water accumulation in the upper section, ensuring that the top spray arm achieves high hydraulic output.

[0012] For ease of connection, the cross-sectional area of ​​the lower section of the water pipe is less than or equal to the outlet area of ​​the cleaning machine's water pump.

[0013] Preferably, when the cross-sectional area of ​​the lower section of the water pipe is smaller than the outlet area of ​​the cleaning machine's water pump, the lower end of the water pipe is provided with a transition section whose width smoothly increases along the water flow direction. The outlet area of ​​the water pump is determined based on its design principles and overall structure, and the design of the transition section helps to reduce pipeline losses after the lower section of the water pipe is connected to the water pump outlet.

[0014] To accommodate the structure of the washing chamber, the lower section of the water pipe extends vertically, and the transition section is arranged horizontally with its rear end connected to the lower section by a smooth transition bending structure.

[0015] Preferably, both the upper and lower sections are flat pipe segments, with the upper ends of the lower section tapering towards each other and smoothly connecting to the lower end of the upper section. Preferably, the rear wall of the water pipe at the junction of the lower and upper sections gradually slopes forward from bottom to top, forming a guide slope. This structure helps reduce pipe losses at points where the pipe cross-section changes.

[0016] Preferably, the first outlet is located on the front side wall of the water pipe at the upper end of the lower section, and the guide slope is arranged corresponding to the upper edge of the first outlet. This structure facilitates guiding the water flow to the first outlet at the pipe contraction point, and helps to streamline and guide the two water flows, reducing water flow energy loss.

[0017] A cleaning machine includes a housing and a water pump disposed in the housing, and also includes the aforementioned piping structure, wherein the water pipe is arranged close to the inner wall of the housing, and its inlet is connected to the outlet of the water pump.

[0018] Compared with the prior art, the advantages of this utility model are as follows: This utility model has designed the parameters of the water pipe. According to the calculation principle of pipe head loss in pipe design, under the condition of constant flow rate, the larger the pipe cross-sectional area, the smaller the flow velocity, and the smaller the kinetic energy loss when the kinetic energy of water is converted into pressure energy. However, if the pipe cross-sectional area is too large, the water volume in the pipe will be large. This utility model designs the pipe parameters to be 0.05≤(Q / S). 2 With a value of ≤0.2, the pipeline loss is effectively reduced, and a low water level is maintained in the pipeline, thereby improving the hydraulic output effect at the water outlet. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the water pipe structure in an embodiment of this utility model;

[0020] Figure 2 for Figure 1 A sectional view;

[0021] Figure 3 for Figure 2 Enlarged view of section A. Detailed Implementation

[0022] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0023] In the description of this utility model, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation 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.

[0024] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this utility model, unless otherwise explicitly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this invention are for illustrative purposes only and do not represent the only possible implementation.

[0028] like Figures 1-3 As shown, the pipeline structure for the cleaning machine in this embodiment includes a water pipe 1. The lower end of the water pipe 1 is an inlet 10, and the upper part is provided with an outlet. The cross-sectional area of ​​the water pipe 1 upstream of the outlet is S, and the output water flow rate of the outlet is Q. Then, 0.05 ≤ (Q / S). 2 ≤0.2.

[0029] According to the calculation principle of pipeline head loss in pipeline design, under the condition of constant flow rate, the larger the pipeline cross-sectional area, the lower the flow velocity, and the smaller the kinetic energy loss when the kinetic energy of water is converted into pressure energy. However, if the pipeline cross-sectional area is too large, the pipeline will have a large water storage capacity. In this embodiment, the pipeline parameters are designed to be 0.05≤(Q / S). 2 ≤0.2, which effectively reduces pipeline losses and maintains a low water level in the pipeline, thereby improving the hydraulic output effect at the outlet of water pipe 1.

[0030] The formula for calculating local losses in pipeline loss design (friction losses account for a small portion of the total loss and are therefore not considered) is as follows:

[0031]

[0032] in,

[0033] Δh represents the head loss in the pipeline;

[0034] ξ j v is the local loss coefficient of the pipeline. j For local flow velocity,

[0035] As can be seen from the above formulas, pipeline losses are mainly affected by the following three factors:

[0036] ξ j This is the local loss coefficient of the pipeline, which mainly guides the optimization of pipeline connections, bends, and cross-sectional area changes;

[0037] Q j Flow rate has a square relationship with head loss, meaning that flow rate directly affects head loss in pipelines;

[0038] S jThe cross-sectional area of ​​the pipeline is the largest. The smaller the flow velocity, the smaller the kinetic energy loss when kinetic energy is converted into pressure energy.

[0039] In this embodiment, a first outlet 11 is provided in the middle of the water pipe 1, and a second outlet 12 is provided at the top. The water pipe 1 includes a lower section a below the first outlet 11 and an upper section b between the first outlet 11 and the second outlet 12. The output water flow rate of the first outlet 11 is Q1, the output water flow rate of the second outlet 12 is Q2, and the cross-sectional area of ​​the lower section a is S. 下 Then 0.05 ≤ [(Q1+Q2) / S 下 ] 2 ≤0.2. The first water outlet 11 is connected to the middle spray arm and the second water outlet 12 is connected to the top spray arm to meet the washing needs of large-capacity dishwashers. In actual production, Q1 and Q2 are fixed for a specific capacity dishwasher. Based on this, the cross-sectional area of ​​the lower section a of the water pipe 1 for supplying water to both is designed to reduce pipe loss and water retention in the lower section a, ensuring that both the middle spray arm and the top spray arm achieve high hydraulic output.

[0040] The cross-sectional area of ​​the upper segment b is S 上 Then 0.05 ≤ (Q2 / S) 上 ) 2 ≤0.2. The upper section b of water pipe 1 supplies water only to the top spray arm. This design is adopted to reduce pipe losses and water accumulation in the upper section b, and to ensure that the top spray arm achieves a high hydraulic output effect.

[0041] To facilitate connection, the cross-sectional area of ​​the lower section a of water pipe 1 is less than or equal to the outlet area of ​​the cleaning machine's water pump. When the cross-sectional area of ​​the lower section a of water pipe 1 is less than the outlet area of ​​the cleaning machine's water pump, a transition section 13 is provided at the lower end of water pipe 1, with its width smoothly increasing along the water flow direction. The outlet area of ​​the water pump is determined based on its design principles and overall structure. The design of the transition section 13 helps reduce pipeline losses after the lower section a of water pipe 1 is connected to the water pump outlet.

[0042] To accommodate the structure of the washing chamber, the lower section a of the water pipe 1 extends vertically, and the transition section 13 is arranged horizontally with its rear end connected to the lower section a through a smooth transition bending structure 14.

[0043] In this embodiment, both the upper section b and the lower section a of water pipe 1 are flat pipe sections. The two sides of the upper end of the lower section a converge relatively close to each other and smoothly connect with the lower end of the upper section b. The rear side wall of water pipe 1 corresponding to the junction of the lower section a and the upper section b gradually slopes forward from bottom to top to form a guide slope 15. The above structure helps to reduce pipeline losses at the point where the pipe cross-section changes.

[0044] In this embodiment, the first outlet 11 is located on the front side wall of the water pipe 1 and at the upper end of the lower section a, and the guide slope 15 is arranged corresponding to the upper edge of the first outlet 11. This structure is beneficial for guiding the water flow to the first outlet 11 at the pipe contraction point, and is beneficial for sorting and guiding the two water flows, reducing water flow energy loss.

[0045] A cleaning machine includes a housing and a water pump disposed in the housing, and also includes the aforementioned piping structure, wherein a water pipe 1 is arranged close to the inner wall of the housing, and its inlet is connected to the outlet of the water pump.

[0046] This embodiment designs the parameters of the water pipe. According to the calculation principle of pipe head loss in pipe design, under a certain flow rate, the larger the pipe cross-sectional area, the lower the flow velocity, and the smaller the kinetic energy loss when the kinetic energy of water is converted into pressure energy. However, if the pipe cross-sectional area is too large, the pipe will have a large water storage capacity. In this embodiment, the pipe parameters are designed to be 0.05≤(Q / S). 2 ≤0.2, which effectively reduces pipeline losses and maintains a low water level in the pipeline, thereby improving the hydraulic output effect at the outlet of water pipe 1.

[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0048] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A piping structure for a cleaning machine, comprising a water pipe (1), wherein the lower end of the water pipe (1) is an inlet (10) and the upper part is provided with an outlet, characterized in that: The cross-sectional area of ​​the water pipe (1) upstream of the outlet is S, and the output water flow rate of the outlet is Q. Then 0.05 ≤ (Q / S) 2 ≤0.

2.

2. The piping structure for a cleaning machine according to claim 1, characterized in that: The water pipe (1) has a first outlet (11) in the middle and a second outlet (12) at the top. The water pipe (1) includes a lower section (a) below the first outlet (11) and an upper section (b) between the first outlet (11) and the second outlet (12). The output water flow rate of the first outlet (11) is Q1, and the output water flow rate of the second outlet (12) is Q2. The cross-sectional area of ​​the lower section (a) is S. 下 Then 0.05 ≤ [(Q1+Q2) / S 下 ] 2 ≤0.

2.

3. The piping structure for a cleaning machine according to claim 2, characterized in that: The cross-sectional area of ​​the upper segment (b) is S. 上 Then 0.05 ≤ (Q2 / S) 上 ) 2 ≤0.

2.

4. The piping structure for a cleaning machine according to claim 2 or 3, characterized in that: The cross-sectional area of ​​the lower section (a) of the water pipe (1) is less than or equal to the outlet area of ​​the cleaning machine water pump.

5. The piping structure for a cleaning machine according to claim 4, characterized in that: When the cross-sectional area of ​​the lower section (a) of the water pipe (1) is smaller than the outlet area of ​​the cleaning machine water pump, the lower end of the water pipe (1) is provided with a transition section (13) whose width smoothly increases along the water flow direction.

6. The piping structure for a cleaning machine according to claim 5, characterized in that: The lower section (a) of the water pipe (1) extends vertically, and the transition section (13) is arranged horizontally and its rear end is connected to the lower section (a) through a smooth transition bending structure.

7. The piping structure for a cleaning machine according to claim 2 or 3, characterized in that: Both the upper section (b) and the lower section (a) are flat tube sections. The two sides of the upper end of the lower section (a) are relatively close to each other and converge smoothly to the lower end of the upper section (b).

8. The piping structure for a cleaning machine according to claim 7, characterized in that: The rear side wall of the water pipe (1) at the junction of the lower section (a) and the upper section (b) gradually slopes forward from bottom to top to form a guide slope (15).

9. The piping structure for a cleaning machine according to claim 8, characterized in that: The first outlet (11) is located on the front side wall of the water pipe (1) and at the upper end of the lower section (a). The guide slope (15) is arranged corresponding to the upper edge of the first outlet (11).

10. A cleaning machine, comprising a housing and a water pump disposed within the housing, characterized in that: It also includes the pipeline structure of any one of claims 1 to 9, wherein the water pipe (1) is arranged close to the inner side wall of the tank, and its inlet is connected to the outlet of the water pump.

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