Water supply assembly and household appliance with same

Abstract

The invention relates to the technical field of household appliances, in particular to a water supply assembly and a household appliance with the water supply assembly, and aims to solve the problem that washing water in a washing machine is sucked back to a tap water supply system due to negative pressure accidentally generated by the tap water supply system in the prior art. In order to achieve the purpose, a first water supply pipe of the water supply assembly is connected with a water source, a second water supply pipe is connected with a water containing cavity, and a communication device comprises a body, a first branch pipe connected with the first water supply pipe, a second branch pipe connected with the second water supply pipe and a third branch pipe communicated with air. According to the communicating device, water entering the first branch pipe from the first water supply pipe sequentially flows into the water containing cavity through the body and the second branch pipe, and water entering the second branch pipe from the second water supply pipe is discharged through the third branch pipe. The communication device is arranged between the first water supply pipe and the second water supply pipe, so that normal water supply is ensured, and water in the water containing cavity can be prevented from being sucked back to the water source side when negative pressure appears on the water source side.

Description

Technical Field

[0001] The invention relates to the technical field of household appliances, and in particular provides a water supply component and a household appliance having the water supply component. Background Art

[0002] As people's living standards improve, more and more household appliances are used in people's daily lives. Among these household appliances, for example, washing machines, dishwashers, shoe washers, etc., water is usually required during operation, and water and detergents (such as cleaning agents, softeners, etc.) are used to wash clothes, dishes, shoes, etc. put into the household appliances.

[0003] Taking a washing machine as an example, the washing machine includes an outer drum, a washing drum arranged in the outer drum, and a water supply pipeline. The outer drum is connected to the washing drum, and the washing drum is used to hold the clothes to be washed. One end of the water supply pipeline is connected to the outer drum and connected to the tap water supply system. A solenoid valve is arranged on the water supply pipeline. When the washing machine is running, the solenoid valve is opened, and the water in the tap water supply system is sent to the outer drum through the water supply pipeline. That is to say, during the operation of the washing machine, the solenoid valve is in a normally open state, and the tap water supply system is connected to the water supply pipeline of the washing machine. In this case, if an accident occurs in the tap water supply system (such as a water pump failure, etc.), resulting in negative pressure in the tap water supply system, the washing water in the outer drum will be sucked back into the water supply pipeline and enter the tap water supply system, polluting the tap water supply system.

[0004] Accordingly, the art needs a new technical solution to solve the above problems. Summary of the invention

[0005] The present invention aims to solve the above technical problem, that is, to solve the problem in the prior art that washing water in a washing machine is sucked back into the tap water supply system due to accidental negative pressure generated in the tap water supply system, thereby polluting the tap water supply system.

[0006] The present invention provides a water supply component for a household appliance, characterized in that the household appliance includes a water holding chamber, the water supply component includes a first water supply pipe and a second water supply pipe that are connected to each other, the first end of the first water supply pipe is connected to a water source, and the second end of the second water supply pipe is connected to the water holding chamber, the water supply component also includes a connecting device, the connecting device includes a main body and a first branch pipe, a second branch pipe and a third branch pipe that are arranged on the main body and are connected to each other, the first branch pipe is connected to the second end of the first water supply pipe, the second branch pipe is connected to the first end of the second water supply pipe, and the third branch pipe is connected to the air, and the connecting device is configured so that water entering the first branch pipe from the first water supply pipe can flow into the water holding chamber through the main body and the second branch pipe in sequence, and water entering the second branch pipe from the second water supply pipe can be discharged through the third branch pipe.

[0007] In a preferred technical solution of the above water delivery component, a radial dimension of at least a portion of the first branch pipe gradually decreases in a direction from the first end of the first branch pipe toward the second end thereof.

[0008] In the preferred technical solution of the above-mentioned water supply component, the first branch pipe includes a reduced diameter section and a first straight pipe section connected to each other, the first end of the reduced diameter section is connected to the second end of the first water supply pipe, and the second end of the reduced diameter section is connected to the first straight pipe section, and the radial dimension of the reduced diameter section gradually decreases from its first end to the second end.

[0009] In a preferred technical solution of the above water delivery component, a radial dimension of at least a portion of the second branch pipe gradually increases along a direction from a first end of the second branch pipe toward a second end thereof.

[0010] In the preferred technical solution of the above-mentioned water supply component, the second branch pipe includes a second straight pipe section and an expanded diameter section, the first end of the expanded diameter section is connected to the second straight pipe section, the second end of the expanded diameter section is connected to the first end of the second water supply pipe, and the radial dimension of the expanded diameter section gradually increases from its first end to the second end.

[0011] In the preferred technical solution of the above-mentioned water supply component, there is a first angle between the pipe wall of the reduced diameter section and the pipe wall of the first straight pipe section, and there is a second angle between the pipe wall of the expanded diameter section and the second straight pipe section, and the first angle is greater than or equal to the second angle.

[0012] In a preferred technical solution of the above-mentioned water delivery component, the central axis of the first straight pipe section roughly coincides with the central axis of the second straight pipe section.

[0013] In a preferred technical solution of the above-mentioned water supply component, the radial dimension of the second straight pipe section is greater than or equal to the radial dimension of the first straight pipe section.

[0014] In the preferred technical solution of the above-mentioned water supply component, the length of the expanded diameter section is greater than or equal to the length of the reduced diameter section.

[0015] In the technical solution of the present invention, the water delivery assembly includes a first water delivery pipe and a second water delivery pipe which are connected to each other, wherein the first end of the first water delivery pipe is connected to a water source, and the second end of the second water delivery pipe is connected to a water holding chamber of a household appliance. In this way, the water source and the water holding chamber can be connected through the first water delivery pipe and the second water delivery pipe, thereby ensuring normal water supply to the household appliance. The water supply assembly of the present invention also includes a connecting device, which includes a main body, a first branch pipe, a second branch pipe and a third branch pipe. The three branches of the first branch pipe, the second branch pipe and the third branch pipe are connected to each other, the first branch pipe is connected to the second end of the first water supply pipe, the second branch pipe is connected to the first end of the second water supply pipe, and the third branch pipe is connected to the air. The connecting device is configured so that water entering the first branch pipe from the first water supply pipe can flow into the water holding chamber through the main body and the second branch pipe in sequence, and water entering the second branch pipe from the second water supply pipe can be discharged through the third branch pipe. In this way, when the household appliance is operating normally, water in the water source can enter the water holding chamber through the first water supply pipe, the first branch pipe, the second branch pipe and the second water supply pipe in sequence to achieve normal water supply to the household appliance, thereby ensuring stable operation of the household appliance; when negative pressure occurs on the water source side due to an accident, even if the water in the water holding chamber is sucked back into the second water supply pipe due to the negative pressure, it will be discharged through the second branch pipe and the third branch pipe, and will not enter the first branch pipe and then be sucked back to the water source side to pollute the water source. That is to say, by providing a connecting device with a simple structure between the first water supply pipe and the second water supply pipe, which only includes a first branch pipe, a second branch pipe and a third branch pipe that are connected to each other, it is possible to ensure the normal water supply to the household appliance and prevent the water in the water holding chamber from being sucked back to the water source side and polluting the water source when negative pressure occurs on the water source side, thereby ensuring the cleanliness of the water source.

[0016] Furthermore, the radial dimension of at least a portion of the first branch pipe gradually decreases from the first end of the first branch pipe toward the second end thereof. The decrease in radial dimension means a decrease in flow area, so that the flow rate of water entering the first water supply pipe from the water source will increase as the flow area decreases after entering the first branch pipe. In other words, the flow rate of water entering the first branch pipe will gradually increase until it is ejected from the end away from the first water supply pipe.

[0017] The radial dimension of at least a part of the second branch pipe gradually increases from the first end of the second branch pipe to the second end thereof. The increase in radial dimension means an increase in flow area, that is, the flow area of ​​the second branch pipe from the first end to the second end thereof gradually increases. In this way, after the water flows out from the first branch pipe into the second branch pipe, the flow velocity of the water decreases in the second branch pipe, thereby promoting the water flow from the second branch pipe to the second water delivery pipe, and then delivering the water into the water storage chamber.

[0018] By configuring the first branch pipe to reduce its diameter and the second branch pipe to expand its diameter, normal water supply can be ensured during normal operation of the household appliance, thereby ensuring stable operation of the household appliance.

[0019] In a second aspect, the present invention provides a household appliance, comprising the water delivery component described in any of the aforementioned schemes.

[0020] It should be noted that the household appliance has all the technical effects of the water delivery component of the aforementioned solution, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The preferred embodiment of the present invention is described below by taking a drum washing machine as an example and in conjunction with the accompanying drawings, in which:

[0022] Figure 1 It is a structural diagram of a water supply assembly and an outer drum of a drum washing machine according to an embodiment of the present invention;

[0023] Figure 2 It is a structural diagram of a water supply assembly of a drum washing machine according to an embodiment of the present invention;

[0024] Figure 3 yes Figure 2 Section view of the AA plane.

[0025] List of reference numerals:

[0026] 1. Water delivery assembly; 11. First water delivery pipe; 12. Second water delivery pipe; 13. Connecting device; 131. Main body; 132. First branch pipe; 1321. Reduced diameter section; 1322. First straight pipe section; 133. Second branch pipe; 1331. Second straight pipe section; 1332. Expanded diameter section; 134. Third branch pipe; 2. Outer tube. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Although this embodiment is described by taking a drum washing machine as an example, it can also be applied to other types of household appliances such as a washer-dryer, a commercial washing machine, a shoe washing machine, and a dishwasher.

[0028] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "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; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0030] At present, during the operation of the drum washing machine, its water supply pipeline is usually connected to the tap water supply system, and the water supply pipeline is connected to the outer drum of the drum washing machine. If the tap water supply system fails and causes negative pressure in the tap water supply system, taking high-rise water supply as an example, water is usually delivered to each household through the water supply pipeline by a high-pressure water pump. If the water pump fails or the power supply of the water pump is cut off, negative pressure will inevitably appear in the water supply pipeline at the front end of each household. In this case, the washing water at a high position in the outer drum can be easily sucked into the water supply pipeline, and then flow back into the tap water system along the water supply pipeline and the water supply pipeline, polluting the tap water supply system. To this end, the water supply assembly of the present invention can ensure the normal water supply of household appliances by setting a connecting device between the first water supply pipe and the second water supply pipe, and can also prevent the water in the household appliances from being sucked back into the water supply system when negative pressure appears in the tap water supply system, thereby polluting the water source.

[0031] Refer to the following Figures 1 to 3 To illustrate possible implementations of the water delivery component of the present invention and a household appliance having the water delivery component.

[0032] like Figures 1 to 3 As shown and in accordance with Figure 3In the orientation shown, the drum washing machine includes a housing, an outer drum 2 disposed in the housing, an inner drum disposed in the outer drum 2, and a water supply assembly 1, wherein the inner drum and the outer drum 2 are connected to each other and can rotate relative to the outer drum 2. The water supply assembly 1 includes a first water supply pipe 11 and a second water supply pipe 12, wherein the first water supply pipe 11 and the second water supply pipe 12 are connected to each other, wherein the first end of the first water supply pipe 11 is connected to a tap water pipe as a water source, and the second end of the second water supply pipe 12 is connected to the outer drum 2, thereby realizing the connection between the outer drum 2 and the tap water pipe, and ensuring the normal water supply of the drum washing machine. The outer drum 2 can hold washing water, and the inner drum is used to hold clothes to be washed. When washing clothes with the drum washing machine, the clothes to be washed are put into the inner drum, and the external water source enters the outer drum 2 through the first water supply pipe 11 and the second water supply pipe 12 to wet the clothes, and the clothes are washed under the action of washing water and detergent and the rotation of the inner drum. The water delivery assembly 1 also includes a connecting device 13, which includes a body 131 and a first branch pipe 132, a second branch pipe 133 and a third branch pipe 134 arranged on the body 131. The body 131 is generally a long cylindrical structure with two ends open and a circular cross section. Figure 3 The left end of the middle body 131 is connected to the first branch pipe 132, and the second end (approximately Figure 3The right end of the middle body 131) is connected to the second branch pipe 133. An opening is also provided on the lower side wall of the body 131, and the size of the opening in the horizontal direction is roughly the same as the size of the body 131 in the horizontal direction, and the opening is connected to the third branch pipe 134. It can be seen that the first branch pipe 132, the second branch pipe 133 and the third branch pipe 134 are connected to each other through the body 131. The first branch pipe 132 is connected to the second end of the first water supply pipe 11, the second branch pipe 133 is connected to the first end of the second water supply pipe 12, and the third branch pipe 134 is connected to the air. The connecting device 13 is configured so that the water entering the first branch pipe 132 from the first water supply pipe 11 can flow into the outer cylinder 2 through the body 131 and the second branch pipe 133 in sequence, and the water entering the second branch pipe 133 from the second water supply pipe 12 can be discharged through the third branch pipe 134. When the drum washing machine is operating normally, tap water enters the first branch pipe 132 through the first water supply pipe 11. Since the tap water in the water pipe usually has a certain pressure, such as 0.4 MPa, the tap water can pass through the main body 131 and spray into the second branch pipe 133, and then be delivered to the outer drum 2 through the second branch pipe 133 and the second water supply pipe 12, so as to deliver water to the outer drum 2. When negative pressure occurs on the tap water side due to a fault, water cannot be delivered to the outer drum 2, and at this time, the outer drum 2 usually has a high washing water level. Under the action of negative pressure, the water in the outer drum 2 is sucked back into the second water delivery pipe 12, and then enters the second branch pipe 133. At this time, since the water is sucked back into the second branch pipe 133, its pressure is basically consistent with the atmospheric pressure, and it cannot be sprayed from the second branch pipe 133 through the body 131 into the first branch pipe 132, but is directly discharged from the third branch pipe 134, so that the water in the outer drum 2 can be prevented from being sucked back into the tap water pipe. In other words, through the setting of the connecting device 13 of the present invention, it can ensure the normal water supply of the drum washing machine, and can prevent the water in the inner drum from being sucked back into the tap water pipe when negative pressure occurs in the tap water pipe, thereby avoiding pollution of the water source and ensuring the cleanliness of the water source.

[0033] It should be noted that the third branch pipe 134 can be connected to the drain pipe of the drum washing machine, or a water pipe can be set at the third branch pipe 134, and the water pipe passes through the box and extends outside the box. Of course, the third branch pipe 134 may not be connected to the drain pipe and no water pipe is set, but directly faces the inside of the box. Without departing from the basic principles of the present application, those skilled in the art can flexibly select the specific setting method of the third branch pipe 134 according to the specific application scenario, as long as the third branch pipe 134 can be connected to the air.

[0034] It should be noted that the main body 131 can also be set as a cylindrical structure with open ends and a cross-section of a square, rectangular, triangular or other shape. Without deviating from the basic principles of the present application, technical personnel in this field can flexibly select the specific shape of the main body 131 according to the specific application scenario, as long as the first branch 132, the second branch 133 and the third branch 134 that are connected to each other can be set thereon.

[0035] like Figures 1 to 3 As shown, the first branch pipe 132 includes a reduced diameter section 1321 and a first straight pipe section 1322. The reduced diameter section 1321 is substantially a conical structure, and its first end (roughly Figure 3 The left end of the middle reduced diameter section 1321 is connected to the second end of the first water supply pipe 11, and the second end (approximately Figure 3 The right end of the middle reduced diameter section 1321) and the first end of the first straight tube section 1322 (approximately Figure 3 That is, according to Figure 3 In the orientation shown, the reduced diameter section 1321 is located on the left side of the first straight pipe section 1322, and the radial dimension of the reduced diameter section 1321 gradually decreases from left to right, and the radial dimension of the first straight pipe section 1322 is roughly consistent with the radial dimension of the second end of the reduced diameter section 1321. The water entering the first branch pipe 132 through the water pipe has a certain pressure and a certain speed. As the radial dimension decreases, its flow area will also decrease accordingly. In this way, the flow rate of the water entering the first branch pipe 132 will gradually increase during the process of flowing from left to right. When it flows to the second end of the first branch pipe 132, the flow rate increases to the maximum, and then passes through the second end of the first straight pipe section 1322 (roughly Figure 3 The water is sprayed out from the right end of the first straight pipe section 1322 in the middle, passes through the body 131 in the horizontal direction, and then sprays into the second branch pipe 133, and then enters the outer drum 2 through the second water supply pipe 12, so that the normal water supply of the drum washing machine can be ensured.

[0036] It should be noted that the first branch pipe 132 may also only include the reduced diameter section 1321. In this case, the first end of the reduced diameter section 1321 is connected to the second end of the first water supply pipe 11, and the second end is aligned with the second branch pipe 133. Obviously, the first branch pipe 132 may also be configured as a hollow straight pipe, the left end of the first branch pipe 132 is provided with an opening, the diameter of the opening is substantially the same as the inner diameter of the first branch pipe 132, the right end of the first branch pipe 132 is provided with a first baffle, the first baffle is provided with a first through hole, the diameter of the first through hole is smaller than the diameter of the opening, so that the speed of the water flow entering the first branch pipe 132 can also be increased at the right end of the first branch pipe 132, and sprayed out from the first through hole to the second branch pipe 133. Without departing from the basic principles of the present application, technicians in this field can flexibly select the specific setting method of the first branch pipe 132 according to the specific application scenario, as long as the speed of the water flow entering the first branch pipe 132 can be increased and can be sprayed from the second end of the first branch pipe 132 into the second branch pipe 133.

[0037] like Figures 1 to 3 As shown, the second branch pipe 133 includes an expanded diameter section 1332 and a second straight pipe section 1331. The expanded diameter section 1332 is also roughly a conical structure. The first end (roughly Figure 3 The left end of the second straight pipe section 1331) and the second end of the first straight pipe section 1322 (approximately Figure 3 The right end of the first straight pipe section 1322 is arranged opposite to the second end of the second straight pipe section 1331 (approximately Figure 3 The right end of the second straight pipe section 1331) and the first end of the expanded diameter section 1332 (approximately Figure 3 The left end of the middle expanded diameter section 1332 is connected, and the second end of the expanded diameter section 1332 (approximately Figure 3 The right end of the middle expanded diameter section 1332 is connected to the first end of the second water supply pipe 12. In other words, according to Figure 3In the orientation shown in , the second straight pipe section 1331 is located on the left side of the expanded diameter section 1332, and the radial dimension of the expanded diameter section 1332 gradually increases from left to right. The radial dimension of the second straight pipe section 1331 is roughly consistent with the radial dimension of the first end of the expanded diameter section 1332. When the drum washing machine is operating normally, after the water flows out from the first straight pipe section 1322 into the second straight pipe section 1331, the water level will drop after the water flows into the expanded diameter section 1332 due to the increase in the radial dimension of the expanded diameter section 1332, and the flow area will also increase as the radial dimension of the expanded diameter section 1332 increases. The flow rate of the water entering the expanded diameter section 1332 will decrease during the flow from left to right, so that the water with a higher flow rate in the second straight pipe section 1331 will push the water with a lower flow rate in the expanded diameter section 1332 to flow into the second water supply pipe 12, and further into the outer drum 2, instead of flowing back into the body 131 and out from the third branch pipe 134, thereby ensuring the normal water intake of the drum washing machine. When negative pressure occurs on the tap water side due to a fault, even if the water in the outer drum 2 is sucked back into the second water supply pipe 12 and enters the second branch pipe 133, this part of the water flows from the second end of the expanded diameter section 1332 to the first end (roughly Figure 3 When the water in the outer tube 2 flows from the right end to the left end of the expanded diameter section 1332, since the water in the outer tube 2 itself has no pressure, the speed of the water flowing into the second branch pipe 133 is relatively low. Even if the speed of the water flow increases due to the reduction of the radial size of the expanded diameter section 1332, the speed of the water flow will not be very high. When it flows to the first end of the second straight pipe section 1331 (approximately Figure 3 The water flow velocity is usually not enough to support the water flow to pass through the main body 131 and spray to the first branch pipe 132, but it is discharged from the third branch pipe 134 extending downward between the first branch pipe 132 and the second branch pipe 133, thereby preventing the washing water in the outer drum 2 from being sucked back into the tap water system and causing pollution to the tap water.

[0038] It should be noted that the second branch pipe 133 may also only include the enlarged diameter section 1332. In this case, the first end of the enlarged diameter section 1332 is aligned with the second end of the reduced diameter section 1321, and the second end is connected to the first end of the second water supply pipe 12. Obviously, the second branch pipe 133 may also be configured as a hollow straight pipe, the right end of the second branch pipe 133 is provided with an opening, the diameter of the opening is substantially the same as the inner diameter of the second branch pipe 133, the left end of the second branch pipe 133 is provided with a second baffle, the second baffle is provided with a second through hole, the diameter of the second through hole is smaller than the diameter of the opening and larger than the diameter of the first straight pipe section 1322, so as to receive the water flow sprayed from the first straight pipe section 1322 and prevent the water sprayed into the second branch pipe 133 through the first straight pipe section 1322 from flowing back from the left end of the second branch pipe 133 into the body 131. Without departing from the basic principles of the present application, technicians in this field can flexibly select the specific setting method of the second branch pipe 133 according to the specific application scenario, as long as the second branch pipe 133 can receive the water sprayed by the first straight pipe section 1322 and prevent the water sprayed into the second branch pipe 133 through the first straight pipe section 1322 from flowing back into the main body 131.

[0039] It should be noted that the reduced diameter section 1321 and the expanded diameter section 1332 may not be configured as a conical structure, but may be configured as a structure with a radial dimension changing in the horizontal direction and an asymmetric cross section. Figure 3 In the orientation shown, the distance between the tangent of the tube wall of the portion of the reduced diameter section 1321 located above the central axis of the first straight tube section 1322 and the central axis gradually decreases from left to right, the tangent of the tube wall of the portion of the reduced diameter section 1321 located below the central axis of the first straight tube section 1322 is parallel to the central axis, etc. Without departing from the basic principles of the present application, those skilled in the art can flexibly select the specific shapes of the reduced diameter section 1321 and the expanded diameter section 1332 according to specific application scenarios, as long as it can satisfy the radial size of the reduced diameter section 1321 gradually decreasing from left to right and the radial size of the expanded diameter section 1332 gradually increasing from left to right.

[0040] It can be understood that the direction from the first end of the first branch pipe 132 to the second end and the direction from the first end of the second branch pipe 133 to the second end are both approximately Figure 3 In the direction from left to right.

[0041] like Figures 1 to 3 As shown and in accordance with Figure 3In the direction shown, the radial dimension of the reduced diameter section 1321 gradually decreases from left to right. It can be seen that the tube wall of the reduced diameter section 1321 is inclined relative to the horizontal direction, and there is an angle between it and the horizontal direction, while the tube wall of the first straight tube section 1322 is roughly parallel to the horizontal direction, that is, there is a first angle between the tube wall of the reduced diameter section 1321 and the tube wall of the first straight tube section 1322. The radial dimension of the expanded diameter section 1332 gradually increases from left to right, and the tube wall of the expanded diameter section 1332 is also inclined relative to the horizontal direction, and there is an angle between it and the horizontal direction, while the tube wall of the second straight tube section 1331 is roughly parallel to the horizontal direction, that is, there is a second angle between the tube wall of the expanded diameter section 1332 and the tube wall of the second straight tube section 1331. The first angle is greater than the second angle, for example, the first angle is 19° to 23°, and the second angle is 8° to 15°, etc. That is to say, if the diameter of the first end of the reduced diameter section 1321 is approximately the same as the diameter of the second end of the expanded diameter section 1332, then the diameter of the second end of the reduced diameter section 1321 must be smaller than the diameter of the first end of the expanded diameter section 1332, which means that the inclination angle of the tube wall of the reduced diameter section 1321 is greater than the inclination angle of the tube wall of the expanded diameter section 1332. The larger inclination angle of the reduced diameter section 1321 can ensure that the speed of the water flow in the reduced diameter section 1321 is gradually increased, and when it reaches the second end (approximately Figure 3 The right end of the first straight pipe section 1322 in the middle) has enough speed to be sprayed into the second branch pipe 133. The smaller inclination angle of the expanded diameter section 1332 can ensure that the water flow entering the expanded diameter section 1332 will not cause poor water delivery due to too fast a drop in flow rate, and after the negative pressure is generated on the tap water side to suck the water in the outer drum 2 into the second branch pipe 133, the reduction of the radial dimension of the expanded diameter section 1332 from right to left will not cause too much increase in the speed of the water flow, and the water flow does not have the speed to spray from the second straight pipe section 1331 to the first straight pipe section 1322. Through such a setting, the normal water supply of the drum washing machine can be ensured, and the washing water in the outer drum 2 can be better prevented from being sucked back into the tap water system.

[0042] It should be noted that the first angle may also be the same as the second angle. Without departing from the basic principles of the present application, those skilled in the art may flexibly select specific values ​​of the first angle and the second angle according to specific application scenarios, as long as the normal water supply of the drum washing machine can be ensured and the water in the outer drum 2 can be prevented from being sucked back into the tap water system.

[0043] like Figures 1 to 3 As shown and in accordance with Figure 3In the orientation shown, the central axis of the first straight pipe section 1322 is roughly coincident with the central axis of the second straight pipe section 1331, that is, the first straight pipe section 1322 and the second straight pipe section 1331 are roughly located on the same horizontal plane, so that the water flow sprayed from the second end of the first straight pipe section 1322 can be better sprayed into the second straight pipe section 1331, avoiding the water flow from being sprayed onto the third branch pipe 134 or other positions in the body 131. Figure 3 Observed from the vertical direction as shown in , the central axis of the first straight pipe section 1322 may also be slightly higher than the central axis of the second straight pipe section 1331 , as long as the second branch pipe 133 is able to receive the water sprayed from the first branch pipe 132 .

[0044] like Figures 1 to 3 As shown and in accordance with Figure 3 In the orientation shown, the radial dimension of the second straight pipe section 1331 is greater than the radial dimension of the first straight pipe section 1322. For example, the radial dimension of the second straight pipe section 1331 is 4.2-5 mm, and the radial dimension of the first straight pipe section 1322 is 3.8-4.2 mm, etc. In this way, when the drum washing machine is operating normally, the second straight pipe section 1331 can better receive the water sprayed by the first straight pipe section 1322, and the water flow will not be sprayed to other places in the body 131 due to excessive water flow. Obviously, the radial dimension of the second straight pipe section 1331 can also be the same as the radial dimension of the first straight pipe section 1322, as long as the second branch pipe 133 can receive the water flow sprayed by the first branch pipe 132.

[0045] like Figures 1 to 3 As shown and in accordance with Figure 3 In the position shown, the length of the enlarged diameter section 1332 is greater than the length of the reduced diameter section 1321, for example, the length of the reduced diameter section 1321 is 14-16 mm, and the length of the enlarged diameter section 1332 is 15-20 mm, etc. Under such a length, the speed of the water flow can be fully increased in the reduced diameter section 1321, and the water flow entering the enlarged diameter section 1332 has a longer and more sufficient distance to slow down the speed, and the flow speed can be reduced more gently, so as to better ensure the normal water supply of the drum washing machine.

[0046] It should be noted that the length of the enlarged diameter section 1332 may also be the same as the length of the reduced diameter section 1321. Without departing from the basic principles of the present application, those skilled in the art may flexibly select the lengths of the enlarged diameter section 1332 and the reduced diameter section 1321 according to specific application scenarios, as long as the normal water supply of the drum washing machine can be ensured and the water in the outer drum 2 can be prevented from being sucked back into the tap water system.

[0047] It can be understood that the lengths of the diameter expansion section 1332 and the diameter reduction section 1321 are approximately Figure 3The dimensions of the middle diameter expansion section 1332 and the diameter reduction section 1321 along the horizontal direction.

[0048] In a possible implementation, the first water supply pipe 11 and the second water supply pipe 12 are roughly circular tubes, and their radial dimensions are roughly the same, which is 7 mm. The radial dimension of the first end of the reduced diameter section 1321 is 7 mm, the radial dimension of the second end of the reduced diameter section 1321 is 3.8-4.6 mm, and the radial dimension of the first straight pipe section 1322 is roughly the same as the radial dimension of the second end of the reduced diameter section 1321. The radial dimension of the first end of the expanded diameter section 1332 is 4.2-5 mm, the radial dimension of the second end of the expanded diameter section 1332 is 7 mm, and the radial dimension of the second straight pipe section 1331 is roughly the same as the radial dimension of the first end of the expanded diameter section 1332. The length of the first straight pipe section 1322 and the second straight pipe section 1331 is 1 mm, the length of the reduced diameter section 1321 is 15 mm, the length of the body 131 is 20 mm, and the length of the expanded diameter section 1332 is 17 mm. It should be noted that the lengths of the aforementioned water delivery pipes, the straight pipe section, the reduced diameter section 1321, the expanded diameter section 1332 and the main body 131 are approximately Figure 3 The horizontal dimension of the center.

[0049] It should be noted that the specific values ​​of the radial dimensions and lengths, the first angle, and the second angle of the above-mentioned pipelines and pipe sections are merely illustrative and not restrictive. Without departing from the basic principles of the present application, technical personnel in this field can flexibly determine the specific values ​​of the radial dimensions, lengths, and angles according to specific application scenarios, as long as these values ​​can ensure the normal water supply of the drum washing machine and avoid sucking the water in the outer drum 2 back into the tap water system when negative pressure appears on the tap water side.

[0050] In summary, in the preferred technical solution of the present invention, the water supply assembly 1 includes a first water supply pipe 11, a second water supply pipe 12 and a connecting device 13, by connecting the first end of the first water supply pipe 11 to the tap water pipe, connecting the second end of the first water supply pipe 11 to the first branch pipe 132 of the connecting device 13, connecting the second branch pipe 133 of the connecting device 13 to the first end of the second water supply pipe 12, connecting the second end of the second water supply pipe 12 to the outer cylinder 2, and connecting the third branch pipe 134 of the connecting device 13 to the air, so that When the drum washing machine is operating normally, water from the tap pipe can enter the outer drum 2 through the first water supply pipe 11, the first branch pipe 132, the second branch pipe 133 and the second water supply pipe 12 in sequence to ensure normal water supply to the drum washing machine. When negative pressure appears on the tap water side, the water sucked back into the second water supply pipe 12 will be discharged through the second branch pipe 133 and the third branch pipe 134, and will not enter the first water supply pipe 11 through the second branch pipe 133 and the first branch pipe 132 and then enter the tap water pipe to pollute the tap water. By gradually reducing the radial dimension of at least a portion of the first branch pipe 132 in the direction from the first end to the second end, gradually increasing the radial dimension of at least a portion of the second branch pipe 133 in the direction from the first end to the second end, and making the first angle between the tube wall of the reduced diameter section 1321 and the tube wall of the first straight tube section 1322 greater than or equal to the second angle between the tube wall of the expanded diameter section 1332 and the tube wall of the second straight tube section 1331, it is possible to better avoid the water in the outer drum 2 from being sucked back into the tap water pipe when negative pressure occurs on the tap water side while ensuring the normal water supply of the drum washing machine.

[0051] In a second aspect, the present invention provides a household appliance, comprising the water delivery component 1 described in any of the aforementioned schemes.

[0052] It should be noted that the household appliance has all the technical effects of the water delivery component 1 of the aforementioned solution, which will not be repeated here.

[0053] Of course, the above-mentioned replaceable implementations, as well as the replaceable implementations and the preferred implementations, can be used in a cross-coordinated manner to combine new implementations to suit more specific application scenarios.

[0054] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims of the present invention, any one of the claimed embodiments may be used in any combination.

[0055] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A water delivery component for household appliances, characterized in that: The household appliance includes a water holding chamber, the water supply component includes a first water supply pipe and a second water supply pipe connected to each other, the first end of the first water supply pipe is connected to a water source, the second end of the second water supply pipe is connected to the water holding chamber, the water supply component also includes a connecting device, the connecting device includes a main body and a first branch pipe, a second branch pipe and a third branch pipe which are arranged on the main body and connected to each other, the first branch pipe is connected to the second end of the first water supply pipe, the second branch pipe is connected to the first end of the second water supply pipe, and the third branch pipe is connected to the air, and the connecting device is configured so that water entering the first branch pipe from the first water supply pipe can flow into the water holding chamber through the main body and the second branch pipe in sequence, and water entering the second branch pipe from the second water supply pipe can be discharged through the third branch pipe.

2. The water delivery assembly according to claim 1, characterized in that: The radial dimension of at least a portion of the first branch pipe gradually decreases along a direction from the first end of the first branch pipe toward the second end thereof.

3. The water delivery assembly according to claim 2, characterized in that: The first branch pipe includes a reduced diameter section and a first straight pipe section connected to each other, the first end of the reduced diameter section is connected to the second end of the first water supply pipe, the second end of the reduced diameter section is connected to the first straight pipe section, and the radial size of the reduced diameter section gradually decreases from its first end to the second end.

4. The water delivery assembly according to claim 3, characterized in that: The radial dimension of at least a portion of the second branch pipe gradually increases along the direction from the first end of the second branch pipe toward the second end thereof.

5. The water delivery assembly according to claim 4, characterized in that: The second branch pipe includes a second straight pipe section and an expanded diameter section, the first end of the expanded diameter section is connected to the second straight pipe section, the second end of the expanded diameter section is connected to the first end of the second water supply pipe, and the radial size of the expanded diameter section gradually increases from its first end to the second end.

6. The water delivery assembly according to claim 5, characterized in that: A first angle is formed between the tube wall of the reduced diameter section and the tube wall of the first straight tube section, a second angle is formed between the tube wall of the expanded diameter section and the second straight tube section, and the first angle is greater than or equal to the second angle.

7. The water delivery assembly according to claim 5 or 6, characterized in that: The central axis of the first straight pipe section substantially coincides with the central axis of the second straight pipe section.

8. The water delivery assembly according to claim 5 or 6, characterized in that: The radial dimension of the second straight pipe section is greater than or equal to the radial dimension of the first straight pipe section.

9. The water delivery assembly according to claim 5 or 6, characterized in that: The length of the diameter-expanding section is greater than or equal to the length of the diameter-reducing section.

10. A household appliance, characterized in that: The household appliance comprises the water delivery assembly according to any one of claims 1 to 9.

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