Roller washing machine and method for determining water spraying angle of nozzle of roller washing machine

Abstract

The invention discloses a roller washing machine and a method for determining the water spraying angle of a nozzle thereof, the roller washing machine comprises a roller and a nozzle, the nozzle comprises a water guide plate, the water guide plate is opposite to a water outlet pipe opening and guides water discharged from the water outlet pipe opening into the roller, and the method for determining the water spraying angle comprises the steps of obtaining the horizontal distance L between the nozzle and the rear wall of the roller, acquiring a vertical distance h between the nozzle and a load in the roller, and acquiring a water flow velocity v of a water outlet pipe orifice of the nozzle; and determining an included angle theta between the water guide plate and the horizontal plane as a water spraying angle according to the horizontal distance L, the vertical distance h and the water flow velocity v. Therefore, the included angle theta between the water guide plate and the horizontal plane can be determined according to the horizontal distance L, the vertical distance h and the water flow velocity v, so that the water spraying angle with a good water spraying effect is obtained. Repeated simulation and experiments are not needed, the water spraying angle of the sprayer can be obtained by determining the relevant size and water flow information of the washing machine roller, the sprayer with the corresponding water spraying angle can be selected, operation is easy, and universality is high.

Description

Technical Field

[0001] The invention belongs to the technical field of washing machines, and in particular relates to a drum washing machine and a method for determining a water spray angle of a nozzle thereof. Background Art

[0002] The drum washing machine includes a drum and a nozzle. The water sprayed by the nozzle generally flows directly onto the window, and then flows into the drum to soak the clothes in the drum. This method takes a long time to soak the load in the drum, and it needs to rotate the drum several times before the soaking can be completed.

[0003] There is a nozzle having a guide plate for guiding the water from the nozzle outlet. The guide plate guides the water into the drum so that the water flow directly soaks the clothes during the water intake process to reduce the soaking time and the number of times the drum rotates.

[0004] In order to achieve a better water spraying effect and cover all the clothes in the drum as much as possible, the prior art generally adjusts the position of the nozzle and the angle of the nozzle water guide plate repeatedly through simulation and / or experiment (it is necessary to design several nozzles with different water guide plate angles for experiments, which cannot be exhaustive) to adjust the nozzle water spraying angle to achieve the best water spraying effect covering the load in the barrel, which is very troublesome to operate. Most importantly, for different models of drum washing machines, when the drum size of the washing machine changes, the installation position of the nozzle changes, and the water flow rate in different regions is different, it is necessary to readjust the position of the nozzle and the angle of the nozzle water guide plate, conduct repeated experiments, and finally obtain the angle of the nozzle water guide plate that covers the load in the drum, and obtain the nozzle water spraying angle.

[0005] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0006] The present invention proposes a drum washing machine and a method for determining the water spray angle of a nozzle thereof, so as to solve the technical problem that the angle of a water guide plate of a nozzle needs to be determined through experiments and / or simulations in the prior art, which requires repeated experiments and complicated operations.

[0007] In order to achieve the above invention / design purpose, the present invention adopts the following technical solutions:

[0008] A method for determining a water spray angle of a nozzle of a drum washing machine, the drum washing machine comprising a drum and a nozzle, the nozzle comprising a tube body having a water outlet and a water guide plate located on the tube body, the water guide plate being opposite to the water outlet and guiding the water outlet of the water outlet into the drum, the method for determining the water spray angle of the nozzle is as follows:

[0009] Obtain the horizontal distance L between the nozzle and the rear wall of the drum, obtain the vertical distance h between the nozzle and the load in the drum, and obtain the water flow velocity v of the water outlet of the nozzle;

[0010] The angle θ between the water guide plate and the horizontal plane is determined as the water spraying angle according to the horizontal distance L, the vertical distance h and the water flow velocity v.

[0011] According to the above method for determining the spray angle of the nozzle of the drum washing machine, the horizontal distance L, the vertical distance h and the water flow velocity v have the following relationship:

[0012] Formula 1: v*t*s inθ+1 / 2*g*t 2 =h;

[0013] Formula 2: v*t*cosθ=L;

[0014] The t is the time it takes for the water flow from the water outlet of the nozzle to fall a vertical distance h;

[0015] The angle θ between the water guide plate and the horizontal plane is calculated according to Formula 1 and Formula 2.

[0016] The method for determining the water spray angle of the nozzle of the drum washing machine as described above, the method for determining the angle θ between the water guide plate and the horizontal plane according to the horizontal distance L, the vertical distance h and the water flow velocity v is:

[0017] The initial inclination angle φ is obtained according to the horizontal distance L and the vertical distance h, tanφ=h / L;

[0018] Estimate the time t'=L / (v*cosφ) for the water flow from the water outlet of the nozzle to fall a vertical distance h;

[0019] According to the formula v*t'*s inθ'+1 / 2*g*t' 2 =h to calculate θ', the angle θ between the water guide plate and the horizontal plane is θ'.

[0020] In the method for determining the water spray angle of the nozzle of the drum washing machine as described above, the angle θ between the water guide plate and the horizontal plane is a value after correcting the θ′, θ=θ′+set value, and the set value ≤5°.

[0021] In the method for determining the water spray angle of the nozzle of the drum washing machine as described above, the set value = a*(φ-θ'), wherein 0<a<1.

[0022] The method for determining the spray angle of the nozzle of the drum washing machine as described above is to determine in advance the corresponding relationship table of the initial inclination angle φ, the time t' for the water flow from the outlet of the nozzle to fall a vertical distance h, and φ-θ, wherein tanφ=h / L;

[0023] The method for determining the angle θ between the water guide plate and the horizontal plane according to the horizontal distance L, the vertical distance h and the water flow velocity v is:

[0024] The initial inclination angle φ is obtained using the horizontal distance L and the vertical distance h, tanφ = h / L;

[0025] Estimate the time t'=L / (v×cosφ) for the water flow from the water outlet of the nozzle to fall a vertical distance h;

[0026] The angle θ is obtained according to the corresponding relationship table.

[0027] According to the method for determining the water spray angle of the nozzle of the drum washing machine as described above, the water flow velocity in the nozzle tube body is calculated by the water inlet flow rate Q and the inner diameter d of the nozzle tube body, and the water flow velocity v at the water outlet pipe of the nozzle is determined according to the water flow velocity in the nozzle tube body, and the water flow velocity v at the water outlet pipe of the nozzle is greater than the water flow velocity in the nozzle tube body.

[0028] According to the method for determining the water spray angle of the nozzle of the drum washing machine as described above, the water flow velocity v of the water outlet of the nozzle = b*the water flow velocity in the nozzle pipe body, wherein 1<b<3.

[0029] According to the method for determining the water spraying angle of the nozzle of the drum washing machine described above, the initial inclination angle φ is obtained according to the horizontal distance L and the vertical distance h, and the b is negatively correlated with the initial inclination angle φ.

[0030] A drum washing machine comprises a drum and a spray head, wherein the spray angle of the spray head is determined according to the above determination method.

[0031] Compared with the prior art, the advantages and positive effects of the present invention are:

[0032] The drum washing machine of the present invention comprises a drum and a nozzle, the nozzle comprises a tube body with a water outlet and a water guide plate located on the tube body, the water guide plate is opposite to the water outlet and guides the water outlet of the water outlet into the drum, and the method for determining the water spraying angle of the nozzle of the drum washing machine is as follows: obtaining the horizontal distance L between the nozzle and the rear wall of the drum, obtaining the vertical distance h between the nozzle and the load in the drum, and obtaining the water flow velocity v of the water outlet of the nozzle; according to the horizontal distance L, the vertical distance h and the water flow velocity v, the angle θ between the water guide plate and the horizontal plane is determined as the water spraying angle. Therefore, the present invention only needs to determine the position of the nozzle and the drum, obtain the horizontal distance L between the nozzle and the rear wall of the drum, obtain the vertical distance h between the nozzle and the load in the drum, and obtain the water flow velocity v of the water outlet of the nozzle; according to the horizontal distance L, the vertical distance h and the water flow velocity v, the angle θ between the water guide plate and the horizontal plane can be determined, thereby obtaining a water spraying angle with a good water spraying effect. The present invention does not require repeated simulations and experiments. The water spraying angle of the nozzle can be obtained by determining the relevant dimensions and water flow information of the washing machine drum, and a nozzle with a corresponding water spraying angle can be selected. The operation is simple and the versatility is strong.

[0033] The drum washing machine of the present invention uses a method for determining a nozzle water spray angle to determine a nozzle of a corresponding size. There is no need for repeated simulations and experiments during the design process of the drum washing machine, which greatly simplifies the design process. At the same time, the water sprayed by the nozzle of the drum washing machine can cover the load in the barrel, greatly improving the load wetting efficiency and reducing the wetting time and the number of drum rotations.

[0034] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 It is a schematic diagram of a nozzle according to a specific embodiment of the present invention.

[0037] Figure 2 It is a schematic diagram of a nozzle and a roller according to a specific embodiment of the present invention.

[0038] Figure 3 It is a flow chart of a method for determining a water spray angle according to a specific embodiment of the present invention.

[0039] Figure 4 It is a flow chart of a method for determining a water spray angle according to another specific embodiment of the present invention.

[0040] Figure 5It is a flow chart of a method for determining a water spray angle according to another specific embodiment of the present invention.

[0041] In the figure,

[0042] 1. Roller;

[0043] 2. Nozzle;

[0044] 21. Pipe body;

[0045] 22. Water outlet;

[0046] 23. Water guide plate. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" 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, rather than indicating or implying that the device or element referred to 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.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In the description of the implementation method, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0050] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0051] In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0052] like Figure 1-2As shown, a drum washing machine comprises a drum 1 and a spray head 2, wherein the spray head 2 is located above the side of the inlet of the drum 1, generally located at the window pad.

[0053] like Figure 2 As shown, the spray head 2 includes a pipe body 21 having a water outlet 22 and a water guide plate 23 located on the pipe body 21 .

[0054] The tube body 21 is tubular, the first end of the tube body 21 is the water inlet, the second end is the water outlet 22, and a water guide plate 23 is also arranged at the second end of the tube body 22. The water guide plate 23 is arranged opposite to the water outlet 22, and the water guide plate 23 is used to guide the water outlet 22 into the drum 1.

[0055] The surface of the water guide plate 23 opposite to the water outlet pipe 22 is a water guide surface, and the water guide surface is used to guide the water outlet of the water outlet pipe 22 into the drum 1.

[0056] Generally, the nozzle body 21 is installed in the vertical direction, the water guide plate 23 is tilted downward, and the tilting direction is toward the drum 1, the water guide plate 23 is set at a certain angle to the horizontal plane, and the angle between the water guide surface of the water guide plate 23 and the horizontal plane is the water outlet angle.

[0057] In order to achieve a layered water outlet effect, the water guide plate 23 is fan-shaped, and the edge of the water guide plate 23 is arc-shaped, so that the water outlet distance in the middle is the farthest and the water outlet distance gradually decreases toward the two sides.

[0058] The water surface is dispersed into a fan-shaped water curtain by the water guide plate 23 and finally falls on the inner drum load. The water at the front end of the fan reaches the rear wall of the drum, and the fan-shaped water curtain intersects with the drum and can completely cover the inner wall of the drum as the drum rotates.

[0059] The water outlet angle of the water guide plate 23 should not be too large or too small, otherwise, the water outlet cannot cover the load in the barrel. Therefore, in order to make the water outlet effect produced by the water guide plate 23 cover the load in the barrel as much as possible, the water spraying angle of the nozzle needs to be determined.

[0060] The following three specific examples illustrate how to determine the water spray angle of a drum washing machine:

[0061] Embodiment 1

[0062] The method for determining the water spray angle of the nozzle in this embodiment is:

[0063] Obtain the horizontal distance L between the nozzle and the rear wall of the drum, obtain the vertical distance h between the nozzle and the load inside the drum, and obtain the water flow velocity v at the water outlet of the nozzle.

[0064] like Figure 2 As shown, after the drum specifications and the nozzle position of the drum washing machine are determined, the horizontal distance L between the nozzle and the rear wall of the drum can be determined.

[0065] The load capacity in the drum is generally the load capacity that is most commonly used for each wash, which can be selected through big data. Of course, it can also be as close to the rated load as possible.

[0066] After the load amount is determined, the height of the load in the drum can be determined, thereby determining the vertical distance h between the nozzle (bottom of the nozzle) and the load in the drum (top surface of the load).

[0067] The water flow velocity v1 in the nozzle tube body is calculated by the water inlet flow Q and the nozzle tube body inner diameter d, Q = v1 * S = v1 * π (d / 2) 2 .

[0068] The water flow velocity v of the water outlet of the nozzle is determined according to the water flow velocity v1 in the nozzle tube body. The water flow velocity v of the water outlet of the nozzle is greater than the water flow velocity v1 in the nozzle tube body.

[0069] In some embodiments, the water flow velocity v at the water outlet of the nozzle = b*the water flow velocity v1 in the nozzle pipe body, wherein 1<b<3. b is a certain value.

[0070] In some embodiments, the initial tilt angle φ is obtained according to the horizontal distance L and the vertical distance h, tanφ=h / L, and b is negatively correlated with the initial tilt angle φ.

[0071] This method can make the water flow velocity v at the water outlet of the nozzle more realistic, so that the determined water spray angle can cover the load in the cylinder.

[0072] The angle θ between the water guide plate and the horizontal plane is determined as the water spray angle according to the horizontal distance L, the vertical distance h and the water flow velocity v.

[0073] Among them, the horizontal distance L between the nozzle and the rear wall of the drum, the vertical distance h between the nozzle and the load in the drum, and the water flow velocity v of the water outlet of the nozzle have the following relationship:

[0074] Formula 1: v*t*s inθ+1 / 2*g*t 2 =h;

[0075] Formula 2: v*t*cosθ=L;

[0076] Where t is the time it takes for the water from the nozzle outlet to fall a vertical distance h;

[0077] According to the above formula 1 and formula 2, the parameters θ and t can be solved, and the angle θ between the water guide plate and the horizontal plane can be calculated.

[0078] like Figure 3 As shown, the method for determining the water spray angle of the nozzle of the drum washing machine in this embodiment is:

[0079] S1. Start.

[0080] S2. Obtain the horizontal distance L between the nozzle and the rear wall of the drum, obtain the vertical distance h between the nozzle and the load in the drum, and obtain the water flow velocity v at the water outlet of the nozzle.

[0081] Among them, the horizontal distance L between the nozzle and the rear wall of the drum, and the vertical distance h between the nozzle and the load inside the drum can be measured and input.

[0082] The water flow velocity v of the water outlet of the nozzle can be determined according to the water inlet flow rate Q and the inner diameter d of the nozzle tube body, or according to the water inlet flow rate Q, the inner diameter d of the nozzle tube body and the coefficient b.

[0083] S3. Solve the parameters θ and t according to the relationship formula.

[0084] S4. Output the determined water spray angle θ.

[0085] This embodiment also proposes a drum washing machine, which includes a drum and a nozzle. After the positions of the drum and the nozzle are determined, the water spraying angle of the nozzle is determined by the above determination method. Therefore, there is no need for repeated simulation and experimentation in the design process of the drum washing machine. It is only necessary to obtain the formula input parameters for calculation, which greatly simplifies the design process. At the same time, the water sprayed by the nozzle of the drum washing machine can cover the load in the barrel, greatly improving the load soaking efficiency and reducing the soaking time and the number of drum rotations.

[0086] Embodiment 2

[0087] The method for determining the water spray angle of the nozzle in this embodiment is:

[0088] Obtain the horizontal distance L between the nozzle and the rear wall of the drum, obtain the vertical distance h between the nozzle and the load inside the drum, and obtain the water flow velocity v at the water outlet of the nozzle.

[0089] like Figure 2 As shown, after the drum specifications and the nozzle position of the drum washing machine are determined, the horizontal distance L between the nozzle and the rear wall of the drum can be determined.

[0090] The load capacity in the drum is generally the load capacity that is most commonly used for each wash, which can be selected through big data. Of course, it can also be as close to the rated load as possible.

[0091] After the load amount is determined, the height of the load in the drum can be determined, thereby determining the vertical distance h between the nozzle (bottom of the nozzle) and the load in the drum (top surface of the load).

[0092] The water flow velocity v1 in the nozzle tube body is calculated by the water inlet flow Q and the nozzle tube body inner diameter d, Q = v1 * S = v1 * π (d / 2) 2 .

[0093] The water flow velocity v of the water outlet of the nozzle is determined according to the water flow velocity v1 in the nozzle tube body. The water flow velocity v of the water outlet of the nozzle is greater than the water flow velocity v1 in the nozzle tube body.

[0094] In some embodiments, the water flow velocity v at the water outlet of the nozzle = b*the water flow velocity v1 in the nozzle pipe body, wherein 1<b<3. b is a certain value.

[0095] In some embodiments, the initial tilt angle φ is obtained according to the horizontal distance L and the vertical distance h, tanφ=h / L, and b is negatively correlated with the initial tilt angle φ.

[0096] This method can make the water flow velocity v at the water outlet of the nozzle more realistic, so that the determined water spray angle can cover the load in the cylinder.

[0097] The angle θ between the water guide plate and the horizontal plane is determined as the water spray angle according to the horizontal distance L, the vertical distance h and the water flow velocity v.

[0098] The method for determining the angle θ between the water guide plate and the horizontal plane according to the horizontal distance L, the vertical distance h and the water flow velocity v is:

[0099] The initial inclination angle φ is obtained using the horizontal distance L and the vertical distance h, tanφ=h / L.

[0100] Estimate the time t'=L / (v*cosφ) for the water flow from the water outlet of the sprinkler to fall a vertical distance h.

[0101] According to the formula v*t'*s inθ'+1 / 2*g*t' 2 =h to calculate θ', the angle θ between the water guide plate and the horizontal plane is θ'.

[0102] In some embodiments, the angle θ between the water guide plate and the horizontal plane is a value obtained by correcting θ′, θ=θ′+set value, and the set value ≤5°.

[0103] In some embodiments, the set value=a*(φ-θ'), where 0<a<1.

[0104] In some embodiments, a=1 / 3. By this modification, the effect of the water discharge from the water guide plate 23 covering the load in the barrel can be further improved.

[0105] For example, L = 0.62 m, h = 0.4 m, v = 2*2.64 m / s.

[0106] tanφ=h / L=0.4 / 0.62, so φ=33°.

[0107] The estimated falling time t'=L / (v×cosφ)=0.62 / (2*2.64*cos33°)=0.14s.

[0108] According to the formula v*t'*s inθ'+1 / 2*g*t' 2 =h to calculate θ', θ' = 24.27°.

[0109] θ=θ'+1 / 3*(φ-θ')=24.27°+1 / 3*(33°-24.27°)=27°

[0110] like Figure 4 As shown, the method for determining the water spray angle of the drum washing machine nozzle in this embodiment is:

[0111] S1. Start.

[0112] S2. Obtain the horizontal distance L between the nozzle and the rear wall of the drum, obtain the vertical distance h between the nozzle and the load in the drum, and obtain the water flow velocity v at the water outlet of the nozzle.

[0113] Among them, the horizontal distance L between the nozzle and the rear wall of the drum, and the vertical distance h between the nozzle and the load inside the drum can be measured and input.

[0114] The water flow velocity v of the water outlet of the nozzle can be determined according to the water inlet flow rate Q and the inner diameter d of the nozzle tube body, or according to the water inlet flow rate Q, the inner diameter d of the nozzle tube body and the coefficient b.

[0115] S3. Obtain the initial inclination angle φ using the horizontal distance L and the vertical distance h.

[0116] S4. Estimate the time t' for the water flow from the water outlet of the sprinkler to fall a vertical distance h.

[0117] S5. Calculate θ' according to the formula.

[0118] S6. Correct θ' to obtain the angle θ between the water guide plate and the horizontal plane.

[0119] This embodiment also proposes a drum washing machine, which includes a drum and a nozzle. After the positions of the drum and the nozzle are determined, the water spraying angle of the nozzle is determined by the above determination method. Therefore, there is no need for repeated simulation and experimentation in the design process of the drum washing machine. It is only necessary to obtain the formula input parameters for calculation, which greatly simplifies the design process. At the same time, the water sprayed by the nozzle of the drum washing machine can cover the load in the barrel, greatly improving the load soaking efficiency and reducing the soaking time and the number of drum rotations.

[0120] Embodiment 3

[0121] The method for determining the water spray angle of the nozzle in this embodiment is:

[0122] Obtain the horizontal distance L between the nozzle and the rear wall of the drum, obtain the vertical distance h between the nozzle and the load inside the drum, and obtain the water flow velocity v at the water outlet of the nozzle.

[0123] like Figure 2 As shown, after the drum specifications and the nozzle position of the drum washing machine are determined, the horizontal distance L between the nozzle and the rear wall of the drum can be determined.

[0124] The load capacity in the drum is generally the load capacity that is most commonly used for each wash, which can be selected through big data. Of course, it can also be as close to the rated load as possible.

[0125] After the load amount is determined, the height of the load in the drum can be determined, thereby determining the vertical distance h between the nozzle (bottom of the nozzle) and the load in the drum (top surface of the load).

[0126] The water flow velocity v1 in the nozzle tube body is calculated by the water inlet flow Q and the nozzle tube body inner diameter d, Q = v1 * S = v1 * π (d / 2) 2 .

[0127] The water flow velocity v of the water outlet of the nozzle is determined according to the water flow velocity v1 in the nozzle tube body. The water flow velocity v of the water outlet of the nozzle is greater than the water flow velocity v1 in the nozzle tube body.

[0128] In some embodiments, the water flow velocity v at the water outlet of the nozzle = b*the water flow velocity v1 in the nozzle pipe body, wherein 1<b<3. b is a certain value.

[0129] In some embodiments, the initial tilt angle φ is obtained according to the horizontal distance L and the vertical distance h, tanφ=h / L, and b is negatively correlated with the initial tilt angle φ.

[0130] This method can make the water flow velocity v at the water outlet of the nozzle more realistic, so that the determined water spray angle can cover the load in the cylinder.

[0131] The angle θ between the water guide plate and the horizontal plane is determined as the water spray angle according to the horizontal distance L, the vertical distance h and the water flow velocity v.

[0132] Determine in advance the initial inclination angle φ, the time t' for the water flow of the water outlet of the sprinkler to fall a vertical distance h, and a corresponding relationship table of φ-θ, wherein tanφ=h / L.

[0133] The corresponding relationship table is as follows:

[0134]

[0135] The method for determining the angle θ between the water guide plate and the horizontal plane according to the horizontal distance L, the vertical distance h and the water flow velocity v is:

[0136] The initial inclination angle φ is obtained using the horizontal distance L and the vertical distance h, tanφ=h / L.

[0137] Estimate the time t'=L / (v×cosφ) for the water flow from the water outlet of the sprinkler to fall a vertical distance h.

[0138] The angle θ is obtained according to the corresponding relationship table.

[0139] For example, L = 0.62 m, h = 0.4 m, v = 2*2.64 m / s.

[0140] tanφ=h / L=0.4 / 0.62, so φ=33°.

[0141] The estimated falling time t'=L / (v×cosφ)=0.62 / (2*2.64*cos33°)=0.14s.

[0142] From the table, we can find that φ-θ=4°, therefore, θ=29°.

[0143] like Figure 5 As shown, the method for determining the water spray angle of the drum washing machine nozzle in this embodiment is:

[0144] S1. Start.

[0145] S2. Obtain the horizontal distance L between the nozzle and the rear wall of the drum, obtain the vertical distance h between the nozzle and the load in the drum, and obtain the water flow velocity v at the water outlet of the nozzle.

[0146] Among them, the horizontal distance L between the nozzle and the rear wall of the drum, and the vertical distance h between the nozzle and the load inside the drum can be measured and input.

[0147] The water flow velocity v of the water outlet of the nozzle can be determined according to the water inlet flow rate Q and the inner diameter d of the nozzle tube body, or according to the water inlet flow rate Q, the inner diameter d of the nozzle tube body and the coefficient b.

[0148] S3. Obtain the initial inclination angle φ using the horizontal distance L and the vertical distance h.

[0149] S4. Estimate the time t' for the water flow from the water outlet of the sprinkler to fall a vertical distance h.

[0150] S5. Look up the table.

[0151] S6. Obtain the angle θ between the water guide plate and the horizontal plane according to the corresponding relationship table.

[0152] This embodiment also proposes a drum washing machine, which includes a drum and a nozzle. After the positions of the drum and the nozzle are determined, the water spraying angle of the nozzle is determined by the above determination method. Therefore, there is no need for repeated simulation and experimentation in the design process of the drum washing machine. It is only necessary to obtain the formula input parameters for calculation, which greatly simplifies the design process. At the same time, the water sprayed by the nozzle of the drum washing machine can cover the load in the barrel, greatly improving the load soaking efficiency and reducing the soaking time and the number of drum rotations.

[0153] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A method for determining the water spray angle of a nozzle of a drum washing machine, the drum washing machine comprising a drum and a nozzle, the nozzle comprising a tube body having a water outlet and a water guide plate located on the tube body, the water guide plate being opposite to the water outlet and guiding the water outlet of the water outlet into the drum, characterized in that: The method for determining the water spray angle of the nozzle is: Obtain the horizontal distance L between the nozzle and the rear wall of the drum, obtain the vertical distance h between the nozzle and the load in the drum, and obtain the water flow velocity v of the water outlet of the nozzle; The angle θ between the water guide plate and the horizontal plane is determined as the water spraying angle according to the horizontal distance L, the vertical distance h and the water flow velocity v.

2. The method for determining the water spray angle of a nozzle of a drum washing machine according to claim 1, characterized in that: The horizontal distance L, vertical distance h and water flow velocity v have the following relationship: Formula 1: v*t*sinθ+1 / 2*g*t 2 =h; Formula 2: v*t*cosθ=L; The t is the time it takes for the water flow from the water outlet of the nozzle to fall a vertical distance h; The angle θ between the water guide plate and the horizontal plane is calculated according to Formula 1 and Formula 2.

3. The method for determining the water spray angle of a nozzle of a drum washing machine according to claim 1, characterized in that: The method for determining the angle θ between the water guide plate and the horizontal plane according to the horizontal distance L, the vertical distance h and the water flow velocity v is: The initial inclination angle φ is obtained according to the horizontal distance L and the vertical distance h, tanφ=h / L; Estimate the time t'=L / (v*cosφ) for the water flow from the water outlet of the nozzle to fall a vertical distance h; According to the formula v*t'*sinθ'+1 / 2*g*t' 2 =h to calculate θ', the angle θ between the water guide plate and the horizontal plane is θ'.

4. The method for determining the water spray angle of the nozzle of the drum washing machine according to claim 3, characterized in that: The angle θ between the water guide plate and the horizontal plane is a value after correcting the θ′, θ=θ′+a set value, and the set value is ≤5°.

5. The method for determining the water spray angle of the nozzle of the drum washing machine according to claim 4, characterized in that: The set value=a*(φ-θ'), where 0<a<1.

6. The method for determining the water spray angle of a nozzle of a drum washing machine according to claim 1, characterized in that: Determine in advance the correspondence table of the initial inclination angle φ, the time t' for the water flow of the water outlet of the nozzle to fall a vertical distance h, and φ-θ, wherein tanφ=h / L; The method for determining the angle θ between the water guide plate and the horizontal plane according to the horizontal distance L, the vertical distance h and the water flow velocity v is: The initial inclination angle φ is obtained using the horizontal distance L and the vertical distance h, tanφ = h / L; Estimate the time t'=L / (v×cosφ) for the water flow from the water outlet of the nozzle to fall a vertical distance h; The angle θ is obtained according to the corresponding relationship table.

7. The method for determining the water spray angle of a nozzle of a drum washing machine according to any one of claims 1 to 6, characterized in that: The water flow velocity in the nozzle tube body is calculated by the water inlet flow rate Q and the inner diameter d of the nozzle tube body. The water flow velocity v at the outlet pipe of the nozzle is determined according to the water flow velocity in the nozzle tube body. The water flow velocity v at the outlet pipe of the nozzle is greater than the water flow velocity in the nozzle tube body.

8. The method for determining the water spray angle of a nozzle of a drum washing machine according to claim 7, characterized in that: The water flow velocity v of the water outlet of the nozzle = b*the water flow velocity in the nozzle pipe body, wherein 1<b<3.

9. The method for determining the water spray angle of a nozzle of a drum washing machine according to claim 8, characterized in that: An initial inclination angle φ is obtained according to the horizontal distance L and the vertical distance h, and b is negatively correlated with the initial inclination angle φ.

10. A drum washing machine, comprising a drum and a nozzle, characterized in that: The water spraying angle of the nozzle is determined according to the determination method described in any one of claims 1-9.

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