Waterway pressure relief device and washing machine

Abstract

The invention provides a waterway pressure relief device, which comprises a valve body, a water inlet end and a water outlet end, the valve core is arranged in the valve body, the shape of the valve core is matched with the shape of the water inlet end of the valve body, and an elastic piece is arranged between the valve core and the water outlet end of the valve body, and is characterized by further comprising a limiting rib, the limiting rib is arranged on the end face, away from the water inlet end, of the valve core and partially protrudes towards the water outlet end from the end face, and one side of one end, abutting against the valve core, of the elastic piece abuts against the end face of the valve core; and the other side is propped against the limiting rib. The limiting rib is arranged at the end, abutting against the spring, of the valve element, when the water path pressure is too large, water flow pushes the valve element, meanwhile, the spring exerts inclined force on the valve element under the action of the limiting rib, the valve element has the tendency of inclining relative to the vertical direction, and the side portion of the valve element is tightly attached to the inner wall of the water inlet end; and abnormal noise caused by shaking of the valve core due to unstable water path pressure is prevented. The invention further provides a washing machine provided with the waterway pressure relief device.

Description

Technical Field

[0001] The present invention belongs to the technical field of clothing processing equipment, and in particular relates to a water channel pressure relief device for a washing machine, and also relates to a washing machine equipped with the water channel pressure relief device. Background Art

[0002] As consumers' quality of life improves, washing machines have become indispensable to people's lives. Existing washing machines generally have an outer drum for holding washing water, a rotatable inner drum is arranged inside the outer drum, and a dehydration hole connecting the inside and outside is provided on the inner drum, so that the washing water flowing into the outer drum can flow alternately inside and outside the inner drum through the dehydration hole, so as to achieve the effect of contacting the washing water with the load to be processed placed in the inner drum and using the washing water to process the load.

[0003] The additive delivery method of the above-mentioned conventional washing machine is as follows: the additive is delivered into a pipe connected to the outer drum of the washing machine through an additive delivery device, and then the delivered additive flows into the outer drum of the washing machine along the pipe; then, when the washing machine executes a washing program, the delivered additive is mixed with the washing water flowing into the outer drum, and part of the washing water mixed with the additive flows into the inner drum through a dehydration hole and contacts with the load to be processed in the drum, so as to achieve the effect of using the additive to produce a treatment effect such as washing on the load.

[0004] The above-mentioned existing dispensing device is generally provided with a pressure relief device at the water box, and the pressure relief device is usually a pressure relief valve. When the water circuit pressure is too high, excess liquid overflows from the pressure relief device, thereby reducing the pressure in the water circuit. During the liquid overflow process, due to the instability of the water circuit pressure, the valve core of the pressure relief valve will cause radial vibration, thereby generating vibration noise.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a water circuit pressure relief device. By arranging a valve core, a limiting rib, a spring and a limiting column, when the water circuit pressure is too large, the water circuit gives the valve core a downward force, and at the same time, the spring gives the valve core a tilting force under the action of the limiting rib, so that the valve core has a tendency to tilt relative to the vertical direction. The upper part of one side of the valve core is close to the inner wall on one side of the water inlet end, and the lower part of the opposite side is close to the inner wall on the other side of the water inlet end, which overcomes the problem of valve core shaking and producing abnormal noise due to unstable water circuit pressure in the prior art.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0008] A waterway pressure relief device, comprising:

[0009] The valve body, the water inlet end is connected with the water circuit;

[0010] The valve core is arranged in the valve body, adapted to the shape of the water inlet end of the valve body, and an elastic member is arranged between the valve body and the water outlet end of the valve body, and also includes:

[0011] The limiting rib is arranged on the end face of the valve core away from the water inlet end, and protrudes from the end face partially toward the water outlet end. The end of the elastic member abutting the valve core abuts the end face of the valve core on one side and the limiting rib on the other side.

[0012] Furthermore, a limiting column extending along the middle of the valve core toward the water outlet end is arranged at one end of the valve core away from the water inlet end, the limiting rib is arranged on one side of the limiting column, and the elastic member is sleeved on the outer periphery of the limiting column.

[0013] Furthermore, the limiting ribs extend from the peripheral wall of the limiting column in a direction away from the axis of the limiting column, and the axial length of the limiting ribs gradually decreases in the direction away from the axis of the limiting column;

[0014] Preferably, the end surface of the limiting rib away from one end of the valve core is set as an arc-shaped surface with a high middle and low sides.

[0015] Furthermore, the limiting ribs include:

[0016] The first limiting rib comprises two parts extending from the peripheral wall of the limiting column in directions away from each other and forming a first angle with the extending direction of the limiting rib;

[0017] The second limiting ribs extend from the ends of the first limiting ribs in a direction close to each other, and the ends are connected, and form a second angle with the extending direction of the limiting ribs;

[0018] Preferably, the first angle is greater than the second angle.

[0019] Furthermore, the caliber of the water outlet end of the valve body is greater than or equal to the diameter of the elastic member, and a limiting structure abutting against the end of the elastic member is arranged inside the water outlet end.

[0020] Furthermore, the limiting structure includes:

[0021] The first limiting portion extends radially along the water outlet end, and both ends are connected to the inner wall of the water outlet end; the second limiting portion protrudes and extends from the middle of the first limiting portion toward the water inlet end; one end of the elastic member away from the valve core is sleeved on the outer periphery of the second limiting portion and abuts against the first limiting portion.

[0022] Furthermore, the first limiting portion includes a plurality of first limiting portions which are arranged alternately with each other, and one end of each first limiting portion close to the valve core is coplanar.

[0023] Further, the valve core includes a valve core body, and a water passing portion arranged on a side of the valve core body away from the water outlet end, and the water passing portion includes:

[0024] A center column is coaxially arranged with the valve core body;

[0025] The support ribs extend radially from the peripheral wall of the central column in a direction away from the axis of the central column, and abut against the inner wall of the water inlet end on the side away from the axis of the central column, and include at least three support ribs evenly arranged along the circumferential direction.

[0026] Furthermore, a groove is provided at one end of the water passing portion away from the water outlet end, and the inner diameter of the groove gradually decreases in a direction approaching the water outlet end.

[0027] The present invention also provides a washing machine equipped with the water channel pressure relief device.

[0028] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0029] The present invention arranges local limiting ribs at the bottom of the valve core so that the bottom of the valve core has a certain height difference. When the spring abuts against the valve core, the compression amounts on both sides of the spring are inconsistent, and the valve core is subjected to an inclined force. When the water circuit pressure is greater than the elastic force of the spring, the valve core moves downward. At the same time, the valve core has a tendency to tilt relative to the vertical direction during the movement, thereby avoiding the shaking and abnormal sound of the valve core when the water circuit pressure is unstable. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0031] Figure 1 It is the overall structure diagram of the pressure relief valve in the present invention;

[0032] Figure 2 This is a front view overall structural diagram of the valve core in the present invention;

[0033] Figure 3 This is a reverse perspective overall structural diagram of the valve core in the present invention;

[0034] Figure 4 This is the overall structural diagram of the plug in the present invention;

[0035] Figure 5 It is a bottom view of the plug in the present invention.

[0036] Description of the main components in the figure:

[0037] 1. Valve body; 11. Water inlet end; 12. Water outlet end; 121. First limiting part; 122. Second limiting part; 2. Valve core; 21. Limiting column; 22. Limiting rib; 221. First limiting rib; 222. Second limiting rib; 23. Water passing part; 231. Center column; 232. Supporting rib; 234. Guide groove; 235. Groove; 3. Spring; 4. Plug; 41. Connecting part; 411. Connecting hole. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0039] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0040] 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; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Embodiment 1

[0042] like Figures 1 to 5 As shown, the present invention provides a pressure relief device for automatic water discharge of a washing machine, comprising a valve core 2, which is arranged at one end of the pressure relief device close to the water circuit and adapted to the water inlet end 11, and an elastic member is arranged between the valve core 2 and the water outlet end 12.

[0043] Specifically, the pressure relief device is configured as a one-way valve, and a gasket is provided on the valve core 2, which can clamp the valve core 2 on the valve body 1 on the one hand, and increase its airtightness on the other hand to prevent liquid from overflowing under normal conditions.

[0044] Specifically, the inner wall of the valve body 1 extends from the water inlet end 11 to the water outlet end 12, extends a short distance outward after extending for a certain distance, and then continues to extend toward the water outlet end 12 to the outside of the delivery device. The gasket is stuck in the outwardly extending part to prevent the valve core 2 from being pushed out of the valve body 1 under the elastic force of the elastic member.

[0045] Specifically, a limiting column 21 is provided on the end face of the valve core 2 away from the water inlet end 11 , and the limiting column 21 extends from the middle of the end face of the valve core 2 away from the water inlet end 11 in a direction perpendicular to the end face.

[0046] Specifically, a limiting rib 22 is provided on one side of the limiting column 21, and the limiting rib 22 includes: a first limiting rib 221, including two parts extending from the peripheral wall of the limiting column 21 in directions away from each other, forming a first angle with the extension direction of the limiting rib 22; a second limiting rib 222, extending from the end of the first limiting rib 221 in a direction approaching each other, and the ends are connected, forming a second angle with the extension direction of the limiting rib 22.

[0047] Preferably, the first angle is greater than the second angle.

[0048] Specifically, a spring 3 can be selected as an elastic member, and one end of the spring 3 abuts against the side of the valve core 2 away from the water inlet. The one side of the spring 3 abutting one end abuts against the end face of the valve core 2 away from the water inlet end 11, and the other side abuts against the side of the limiting rib 22 away from the water inlet end 11. Since the end face of the valve core 2 and the side of the limiting rib 22 away from the water inlet end 11 are on the same horizontal line and have different heights, the compression amount of the spring 3 is different when the two abut, and the elastic force on both sides of the spring 3 is also different.

[0049] Specifically, one end of the spring 3 is sleeved on the limit post 21, which plays a limiting role for the spring 3. Since the elastic forces on both sides of one end of the spring 3 are different, the spring 3 is subjected to unbalanced forces, so when the valve core 2 moves downward, it will tilt and deviate. The end of the spring 3 that abuts the valve core 2 is subjected to an oblique upward force and moves obliquely upward. If the limit post 21 is not added, the spring 3 will be separated from the valve core 2. After the valve core 2 is lowered, the elastic force applied upward by the spring 3 is lost, resulting in the water inlet being unable to be sealed in time, and the liquid in the waterway will continue to overflow through the pressure relief valve, causing great waste.

[0050] Specifically, one end of the spring 3 is sleeved on the limit column 21. When the valve core 2 moves downward, the spring 3 exerts an inclined force on the valve core 2, causing the spring 3 to deviate relative to the valve core 2. When one side of the spring 3 deviates to abut against the limit column 21, the spring 3 stops deviating, thereby avoiding the problem of the spring 3 being detached from the valve core 2.

[0051] Preferably, the distance between one end of the limiting rib away from the limiting column and the side of the spring abutted by the limiting column is greater than or equal to the diameter of the spring coil. At this time, when the valve core 2 moves downward and one side deviates to abut against the limiting column 21, the other side of the spring 3 can still abut against the limiting rib 22 extending from the valve core 2. On the one hand, it prevents the side of the spring 3 away from the limiting column 21 from suddenly separating from the limiting rib 22 when offset, thereby increasing its stability; on the other hand, it also prevents the spring 3 from generating abnormal noise when the side of the spring 3 away from the limiting column 21 is suddenly separated from the limiting rib 22 when offset, thereby further reducing the noise.

[0052] Specifically, the water outlet end 12 is hollow inside, and a side away from the water inlet end 11 is communicated with the outside. A first limiting portion 121 and a second limiting portion 122 are provided inside the water outlet end 12 .

[0053] Specifically, the first limiting portion 121 extends radially along the water outlet end 12, and both ends are fixed to the inner wall of the water outlet end 12; preferably, the first limiting portion 121 includes a plurality of first limiting portions 121 arranged alternately with each other, and one end of each first limiting portion 121 close to the valve core 2 is coplanar; the second limiting portion 122 is arranged at the axis of the water outlet end 12, and is a cylinder protruding and extending from the first limiting portion 121 toward the water inlet end 11; the other end of the elastic member abuts against the first limiting portion 121 of the water outlet end 12, and is sleeved on the outer periphery of the second limiting portion 122.

[0054] Specifically, due to the unstable water pressure in the pipeline, the water pressure on the valve core 2 is also unstable. If the spring 3 directly abuts against the end face of the valve core 2 away from the water inlet end 11, radial shaking noise will be generated when the valve core 2 moves back and forth. If the end of the spring 3 abutting against the valve core 2 is set to be inclined, this part of the noise can be reduced.

[0055] Specifically, the distance from the side where the spring 3 abuts the limiting rib 22 to the first limiting portion 121 is smaller than the distance from the side where the spring 3 abuts the end face of the valve core 2 away from the water inlet end 11 to the first limiting portion 121, so that the compression amount of the side where the spring 3 abuts the limiting rib 22 is greater than the compression amount of the side where the spring 3 abuts the end face of the valve core 2 away from the water inlet end 11, and the elastic force of the side where the spring 3 abuts the limiting rib 22 is greater than the elastic force of the side where the spring 3 abuts the end face of the valve core 2. When the water flow rate increases and the internal pressure increases, the downward force on the valve core 2 is greater than the force of the spring 3, and the valve core 2 moves toward the water outlet end 12. Since the compression amounts on both sides of the spring 3 are inconsistent, the force on the valve core 2 is unbalanced. At this time, the valve core 2 is subjected to a tilting force, and the movement of the valve core 2 also needs to overcome the tilting force of the spring 3, thereby avoiding the shaking and abnormal sound of the valve core 2.

[0056] Specifically, the extension direction of the first limiting portion 121 should be set to be the same as the extension direction of the limiting rib 22. The compression amounts on both sides of the spring 3 are different. When the valve core 2 moves downward, the end of the spring 3 close to the water inlet end 11 tilts in the direction away from the limiting rib 22, and also causes the spring 3 away from the water inlet end 11 to tilt. If at this time the extension direction of the first limiting portion 121 is perpendicular to the extension direction of the limiting rib 22, the spring 3 will rotate and tilt with the first limiting portion 121 as the axis, and the inside of the spring coil of the spring 3 will be stuck on the second limiting portion 122. In a short period of time, the spring 3 can be prevented from sliding off the water outlet end 12 due to the rotation and tilting under the action of the second limiting portion 122. During use, the second limiting portion 122 continuously applies force to the spring coil of the spring 3, which will cause the spring coil of the spring 3 to be stretched and enlarged over time, and then the second limiting portion 122 can no longer play a good limiting role, and finally cause the spring 3 to slide off the water outlet end 12.

[0057] Specifically, if the extension direction of the first limiting portion 121 is set to be the same as the extension direction of the limiting rib 22, when the valve core 2 moves downward, the end of the spring 3 close to the water inlet end 11 tilts in the direction away from the limiting rib 22, and also causes the spring 3 away from the water inlet end 11 to tilt. At this time, the tilting direction of the spring 3 is limited by the first limiting portion 121, which prevents the spring 3 from continuing to tilt, thereby causing the spring 3 to slip off. However, during the operation of the device, since the spring 3 often tilts and deviates, the valve core 2 will rotate axially in its vertical direction under the action of the spring 3, thereby changing the angle between the extension direction of the limiting rib 22 and the extension direction of the first limiting portion 121. During long-term use, the spring 3 will still rotate and tilt with the first limiting portion 121 as the axis. This is because the second limiting portion 122 still applies pressure to the spring coil of the spring 3, causing the spring coil of the spring 3 to be stretched and enlarged, and then the second limiting portion 122 can no longer play a good limiting role, ultimately causing the spring 3 to slip off the water outlet end 12.

[0058] Preferably, the first limiting portion 121 can be configured as two intersecting strip blocks, which vertically pass through the axis of the water outlet end 12 and the two ends of each strip block are fixed to the inner wall of the water outlet end 12. When only one first limiting portion 121 is provided, the spring 3 will be unstable when abutting. When the valve core 2 moves downward, the end of the spring 3 abutting the valve core 2 tilts toward the side without the limiting rib 22, thereby causing the end of the spring 3 abutting the first limiting portion 121 to also tilt. If the tilting direction happens to be on both sides of the first limiting portion 121, the spring 3 will fall from the gaps on both sides, the valve core 2 cannot return to its original position, and the liquid in the water path continues to flow out from the water outlet end 12, causing waste.

[0059] Preferably, the intersection angle of the cross-set first limiting parts 121 is set to 90 degrees, and the mutually perpendicular first limiting parts 121 have stronger stability. The two mutually perpendicular first limiting parts 121 can basically solve the problem of the spring 3 sliding off the water outlet end 12. In order to make it more stable, more first limiting parts 121 can be set or the first limiting parts 121 can be set as a mesh disk, and the outer edge of the mesh disk is in contact with and adapted to the inner wall of the water outlet end 12. However, if too many first limiting parts 121 are set, the space occupied will also become more, leaving space for liquid to flow out of the gap. The smaller the space for outflow, the slower the overflow speed will be. When the water pressure is too high, more liquid needs to overflow to balance the water pressure. If the excess liquid does not overflow in time and accumulates in the pressure relief valve, the pressure relief function of the water cannot be achieved. Similarly, if the first limiting portion 121 is set as a mesh disk, on the one hand, the stability is greatly improved, but at the same time its passability is also limited. On the whole, the first limiting portion 121 is set as two intersecting strip blocks, and the solution in which the two strip blocks are perpendicular to each other is the most preferred.

[0060] Specifically, in other possible embodiments, the water outlet 12 is configured as a cylinder protruding from the middle of the water outlet 12 of the valve body 1 in a direction away from the water outlet 12, the interior of the cylinder is hollow, the end of the water outlet 12 close to the water inlet 11 is open, and the end of the water outlet 12 away from the water inlet 11 is closed, and the end surface of the closed end is a first limiting portion 121, and a second limiting portion 122 extending perpendicularly to the first limiting portion 121 in a direction toward the water inlet 11 is provided in the middle of the first limiting portion 121, and a through hole is provided in the middle of the second limiting portion 122, so that the interior of the valve body 1 is connected with the outside, and excess liquid overflows from the through hole in the middle of the second limiting portion 122.

[0061] Specifically, when the water pressure is too high, excess liquid flows into the valve body 1, and the liquid first accumulates in the space surrounded by the outer periphery of the second limiting portion 122, the inner wall of the water outlet end 12 and the first limiting portion 121. When the height of the liquid is higher than the second limiting portion 122, it flows out from the through hole in the middle of the second limiting portion 122. The diameter of the second limiting portion 122 can be set to be the same as the diameter of the inner wall of the spring coil of the spring 3. The spring 3 is sleeved on the second limiting portion 122, and the inner wall of the spring coil of the spring 3 abuts against the outer periphery of the second limiting portion 122. In this way, on the one hand, The spring 3 plays a better fixing role. On the other hand, as the diameter of the second limiting portion 122 is increased, the through hole in the middle of the second limiting portion 122 can also be increased accordingly, which can speed up the liquid overflow. Because the liquid will accumulate in the space surrounded by the outer periphery of the second limiting portion 122, the inner wall of the water outlet 12 and the first limiting portion 121 before overflowing from the middle of the second limiting portion 122, the spring 3 will rust and other problems when immersed in liquid for a long time, thereby reducing the service life of the spring 3. To solve this problem, there is the following solution.

[0062] Specifically, one is to fix the end of the spring 3 away from the water inlet directly on the end face of the second limiting part 122 close to the water inlet end 11. At this time, the spring 3 will only contact the liquid when the water level reaches the top of the second limiting part 122. In other states, the water level cannot reach the height of contacting the spring 3, thereby reducing the contact time between the spring 3 and the liquid; second, a plurality of through holes are provided on the peripheral wall of the second limiting part 122, which are the same as the through holes running through the middle part of the second limiting part 122. At this time, after the liquid flows into the water outlet 12, it is not necessary to wait until the water level reaches the top of the second limiting part 122 before overflowing. Before reaching the top, the liquid can overflow through the through holes on the peripheral wall of the second limiting part 122; third, the first limiting part 121 is set to a mesh shape, and the overflow function is realized by the first limiting part 121. If the water pressure is too large, the amount of water that needs to overflow becomes more, and the overflow efficiency of the mesh structure of the first limiting part 121 is not enough to discharge all the liquid. At this time, the through holes in the middle of the second limiting part 122 can still continue to play a role, so that the device can work normally.

[0063] Specifically, the valve core 2 is provided with a water passing portion 23, which includes: a central column 231, which is coaxially arranged with the main body of the valve core 2; support ribs 232, which extend radially from the peripheral wall of the central column 231 in a direction away from the axis of the central column 231, and abut against the inner wall of the water inlet end 11 on the side away from the axis of the central column 231, and include at least three ribs evenly arranged along the circumferential direction. A guide groove 234 is provided between adjacent support ribs 232, and the guide groove 234 continues to extend from the top to the bottom of the valve core 2, and the extension length ensures that the valve core 2 and the water inlet end 11 are sealed under normal conditions.

[0064] Specifically, the guide groove 234 is used to guide the liquid in the water circuit into the pressure relief valve. When the water circuit pressure is within a normal range, the valve core 2 remains stationary, and a certain amount of liquid is stored between the guide grooves 234 on the top of the valve core 2. When the water circuit pressure increases, since the guide groove 234 extends a distance toward the bottom of the valve core 2, when the valve core 2 moves downward a short distance, excess liquid will flow from the guide groove 234 into the valve body 1, which can quickly reduce the pressure in the water circuit, thereby achieving a dynamic balance effect.

[0065] Embodiment 2

[0066] like Figure 4 , Figure 5 As shown, a washing machine includes a water box, in which a water delivery channel is arranged. The water channel pressure relief device in the above-mentioned embodiment 1 is arranged on the water box, and the water inlet end is connected to the delivery water channel.

[0067] The waterway pressure relief device is integrated on the water box. Specifically, a plug 4 is provided on the water box, and the plug 4 is provided at the water outlet 12 of the pressure relief device. The pressure relief device is provided perpendicular to the waterway from the water inlet 11 to the water outlet 12.

[0068] Specifically, the plug 4 is configured as a cylinder with a through hole in the middle, the outer circumference of the cylinder is adapted to the water outlet end 12, a connecting portion 41 is provided on the side of the cylinder away from the water inlet end 11, the connecting portion 41 is configured to extend from the opposite sides of the cylinder in a direction away from the cylinder, a connecting hole 411 is provided in the extended portion, and a mounting portion adapted to the connecting hole 411 is provided on the water box.

[0069] Specifically, the plug 4 is fixedly connected to the water box by screws. The screws pass through the connecting hole 411 and are rotated and screwed into the mounting portion to fix the plug 4 to the water box. The raised portion of the plug is inserted into the water outlet end 12, and the first limiting portion 121 and the second limiting portion 122 are arranged in the through hole of the plug 4.

[0070] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above in the preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation scheme in the above embodiment can be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the solution of the present invention.

Claims

1. A waterway pressure relief device, comprising: The valve body (1) and the water inlet end (11) are connected to the water path; The valve core (2) is arranged in the valve body (1), adapted to the shape of the water inlet end (11) of the valve body (1), and an elastic member is arranged between the valve core and the water outlet end (12) of the valve body (1), and is characterized in that: It also includes a limiting rib (22) which is arranged on the end face of the valve core (2) away from the water inlet end (11) and protrudes from a part of the end face toward the water outlet end (12); one end of the elastic member abutting against the valve core (2) abuts against the end face of the valve core (2) on one side and against the limiting rib (22) on the other side.

2. A waterway pressure relief device according to claim 1, characterized in that: A limiting column (21) extending along the middle of the valve core (2) towards the water outlet end (12) is arranged at one end of the valve core (2) away from the water inlet end (11), a limiting rib (22) is arranged on one side of the limiting column (21), and an elastic member is sleeved on the outer periphery of the limiting column (21).

3. A waterway pressure relief device according to claim 2, characterized in that: The limiting rib (22) extends from the peripheral wall of the limiting column (21) in a direction away from the axis of the limiting column (21), and the axial length of the limiting rib (22) gradually decreases in the direction away from the axis of the limiting column (21); Preferably, the end surface of the limiting rib (22) away from one end of the valve core (2) is arranged as an arc-shaped surface which is higher in the middle and lower on both sides.

4. A waterway pressure relief device according to claim 3, characterized in that: The limiting ribs (22) include: The first limiting rib (221) comprises two parts extending from the peripheral wall of the limiting column (21) in directions away from each other, and forming a first angle with the extending direction of the limiting rib (22); The second limiting rib (222) extends from the end of the first limiting rib (221) in a direction close to each other, and the ends are connected, and form a second angle with the extension direction of the limiting rib (22); Preferably, the first angle is greater than the second angle.

5. A waterway pressure relief device according to any one of claims 1 to 4, characterized in that: The caliber of the water outlet end (12) of the valve body (1) is greater than or equal to the diameter of the elastic member, and a limiting structure abutting against the end of the elastic member is provided inside the water outlet end (12).

6. A waterway pressure relief device according to claim 5, characterized in that: The limiting structure includes: The first limiting portion (121) extends radially along the water outlet end (12), and its two ends are connected to the inner wall of the water outlet end (12); the second limiting portion (122) protrudes and extends from the middle of the first limiting portion (121) in the direction of the water inlet end (11); and one end of the elastic member away from the valve core is sleeved on the outer periphery of the second limiting portion (122) and abuts against the first limiting portion (121).

7. A waterway pressure relief device according to claim 6, characterized in that: The first limiting portions (121) include a plurality of first limiting portions (121) which are arranged in an interlaced manner, and one end of each first limiting portion (121) close to the valve core (2) is coplanar.

8. A waterway pressure relief device according to any one of claims 1 to 4, characterized in that: The valve core (2) comprises a valve core (2) body, and a water passing portion (23) arranged on a side of the valve core (2) body away from the water outlet end (12), wherein the water passing portion (23) comprises: A center column (231) is coaxially arranged with the valve core (2) body; The support ribs (232) extend radially from the peripheral wall of the central column (231) in a direction away from the axis of the central column (231), and abut against the inner wall of the water inlet end (11) on the side away from the axis of the central column (231), and include at least three support ribs evenly arranged along the circumferential direction.

9. A waterway pressure relief device according to claim 8, characterized in that: A groove (235) is provided at one end of the water passing portion (23) away from the water outlet end (12), and the inner diameter of the groove (235) gradually decreases in a direction approaching the water outlet end (12).

10. A washing machine, characterized in that: A waterway pressure relief device as described in any one of claims 1 to 9 is installed.

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