CN217949233U

CN217949233U - Constant-current device, cleaning waterway and bathroom equipment

Info

Publication number: CN217949233U
Application number: CN202221131783.3U
Authority: CN
Inventors: 李文明; 杨高
Original assignee: Shenzhen Hengzhiyun Technology Co Ltd
Current assignee: Shenzhen Hengzhiyun Technology Co Ltd
Priority date: 2022-05-12
Filing date: 2022-05-12
Publication date: 2022-12-02
Anticipated expiration: 2032-05-12

Abstract

The utility model relates to a constant current device, washing water route and bathroom equipment. The constant current device includes: the valve body is provided with a front pressure cavity and an output cavity which are communicated; the expansion piece is movably arranged in the valve body and provided with a first surface and a second surface which are opposite, the first surface forms at least part of cavity surface of the front pressure cavity, and the second surface forms at least part of cavity surface of the output cavity; the expansion piece is used for moving relative to the valve body to change the volumes of the output cavity and the front pressure cavity; the elastic piece is arranged in the output cavity and is abutted against or connected with the second surface of the expansion piece; the adjusting part is at least partially movably connected to the valve body and used for being connected with the elastic part, and the adjusting part is used for adjusting the deformation degree of the elastic part. The deformation degree of the elastic piece is adjusted through the adjusting piece, and then the elasticity of the elastic piece on the expansion piece is adjusted, so that the pressure difference between the front pressure cavity and the output cavity is changed, and the flow of the water flow which is in a constant flow state and is output by the output cavity is changed.

Description

Constant-current device, cleaning waterway and bathroom equipment

Technical Field

The utility model relates to a technical field of bathroom product especially relates to a constant current device, washing water route and bathroom equipment.

Background

Along with the development of sanitary products, the sanitary products are rapidly developed in the aspects of being more intelligent, convenient, energy-saving, resource-saving and the like.

At present, part of bathroom products have a human body cleaning function by arranging a cleaning waterway. After an external water source is input into the cleaning waterway, water flow is heated to a proper temperature and is sprayed out through a spray head of the cleaning waterway so as to be cleaned towards a human body. Because the input of the external water source is unstable or the spray head is blocked, the flow fluctuation of the water flow sprayed by the cleaning water path is large. In order to stabilize the flow of the water flow ejected from the cleaning water path, a constant flow device is usually added in the cleaning water path, so that the flow of the water flow ejected from the cleaning water path is stable.

In the prior art, the constant flow device generally comprises a valve core, and the flow of water flow is controlled to be stabilized through the movement of the valve core. However, in the current constant flow device, the flow rate of the water flow in the constant flow state is not convenient to adjust.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a constant flow device, a cleaning waterway and a sanitary device, which are used to solve the problem that the flow rate of water flow in a constant flow state is not easy to adjust after the constant flow device performs constant flow control on water.

A constant current device, comprising:

the valve body is provided with a front pressure cavity and an output cavity which are communicated;

the expansion piece is movably arranged in the valve body and provided with a first surface and a second surface which are opposite, the first surface forms at least part of the cavity surface of the front pressure cavity, and the second surface forms at least part of the cavity surface of the output cavity; the expansion piece is used for moving relative to the valve body to change the volume of the output cavity and the front pressure cavity;

the elastic piece is arranged in the output cavity, and the elastic piece is abutted against or connected with the second surface of the expansion piece;

the adjusting part, at least part swing joint in the valve body, the adjusting part be used for with the elastic component is connected, the adjusting part is used for adjusting the deformation degree of elastic component.

In one embodiment, the adjusting member comprises a connecting portion and an adjusting portion, the connecting portion is connected with the elastic member, and the adjusting portion is movably connected with the valve body.

In one embodiment, the adjusting portion is provided with a first adjusting structure, the valve body is provided with a second adjusting structure, and the first adjusting structure and the second adjusting structure are matched to enable the adjusting portion to be movably connected with the valve body.

In one embodiment, the first adjustment structure is an external thread structure; the valve body is provided with a through hole, the second adjusting structure is arranged on at least part of the inner wall of the through hole, the second adjusting structure is of an internal thread structure, and the internal thread structure is matched with the external thread structure.

In one embodiment, the valve further comprises a fastening member movably connected with the adjusting part, and the fastening member is arranged outside the valve body.

In one embodiment, the adjusting member further includes a guide portion protruding from the connecting portion along a deformation direction of the elastic member, and the elastic member is partially sleeved outside the guide portion.

In one embodiment, the valve body is provided with a first limiting structure, the adjusting piece is provided with a second limiting structure, and the first limiting structure is matched with the second limiting structure so that the adjusting piece can move along the deformation direction of the elastic piece.

In one embodiment, the valve further comprises a sealing member, and the sealing member is arranged between the adjusting member and the valve body.

In one embodiment, the front pressure chamber is communicated with the output chamber through an orifice, and a throttle core is arranged at the orifice in a penetrating mode and used for changing the flow area of the orifice.

A cleaning waterway comprises the constant flow device.

A sanitary and bathroom equipment comprises the cleaning waterway.

In the constant-current device, water flow enters the output cavity from the front pressure cavity. The flow rate of the water flow output by the output cavity and the pressure difference between the front pressure cavity and the output cavity have the following relations: the larger the pressure difference between the front pressure chamber and the output chamber, the larger the flow rate of the water flow output by the output chamber. Therefore, in the above technical solution, the difference between the pressures of the two opposite sides (i.e. the two sides corresponding to the first surface and the second surface) of the expansion element is the pressure difference between the front pressure chamber and the output chamber. The pressure difference is basically the ratio of the elastic force provided by the elastic element to the area of the expansion element acted on by the elastic element, namely the pressure formed by the action of the elastic element on the expansion element. The deformation degree of the elastic part is adjusted through the adjusting part, and then the elasticity of the elastic part to the expansion part is adjusted, so that the pressure difference between the front pressure cavity and the output cavity is changed, and the flow of the water flow which is output by the output cavity and is in a constant flow state is changed.

Drawings

Fig. 1 is a schematic structural diagram of a constant current device according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of fig. 1.

Fig. 3 is a partially enlarged schematic view of a portion a of fig. 2.

Fig. 4 is an exploded view of a constant current device according to an embodiment of the present invention.

Fig. 5 is a partially enlarged schematic view of a constant current device according to another embodiment of the present invention.

Reference numerals:

100. a valve body; 101. a front pressure chamber; 102. an output chamber; 103. an orifice; 104. an accommodation hole; 110. a first housing; 120. a second housing; 121. a through hole; 130. a second adjustment structure; 140. a first limit structure; 200. an expansion member; 201. a first surface; 202. a second surface; 210. a flexible pad; 220. a piston plate; 221. a limiting groove; 300. an elastic member; 400. an adjustment member; 401. a sealing groove; 410. a connecting portion; 420. An adjustment section; 421. a first adjustment structure; 430. a guide portion; 440. a holding part; 441. a holding surface; 450. A second limit structure; 460. a transition section; 500. a throttle core; 510. an adjustment head; 600. a fastener; 610. A fastening structure; 700. a seal member; 800. a valve core.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The utility model provides a bathroom equipment.

In some embodiments, the sanitary fixture may be an integral part of the toilet or a detachable part of the toilet structure. It can be understood that the sanitary equipment can also be equipment needing flushing and cleaning, such as a washbasin, a bathtub, a shower head and the like.

In some embodiments, the sanitary fixture comprises a cleaning waterway. The washing water path may provide a water flow such that the water flow is sprayed to the body of the user. For example, when the sanitary equipment is an integral toilet or a detachable part of the toilet, the washing waterway may provide water jet to the user's buttocks, for example, to the anus or the urethral orifice of the user's buttocks, so as to clean or massage the anus or the urethral orifice. For another example, when the sanitary and bath equipment is a washbasin stand, the cleaning waterway can provide water flow to spray into the washbasin stand so as to clean hands of users in the washbasin stand or articles placed in the washbasin stand. For another example, when the device is a bathtub or a shower head, the washing waterway may provide water jet to the body of the user, so that the user may clean or massage the body.

The utility model provides a wash water route.

In some embodiments, the cleaning circuit includes a constant flow device. The constant flow device can perform constant flow control on water flow in the cleaning water channel so as to reduce the occurrence of the condition that the flow fluctuation of the water flow output by the cleaning water channel is large due to the unstable input of an external water source or the blockage of a spray head of the cleaning water channel. In addition, the cleaning water path may further include a heating device. The heating device can be arranged before the constant-current device to heat the inlet water. The heating means may be selected from the prior art.

The utility model provides a constant current device.

In some embodiments, as shown in fig. 1-5, the constant flow device includes a valve body 100, an expansion member 200, an elastic member 300, and an adjustment member 400. The valve body 100 has a front pressure chamber 101 and an output chamber 102 communicating with each other. The expansion member 200 is movably disposed within the valve body 100. The extender 200 has a first surface 201 and a second surface 202 disposed opposite one another. The first surface 201 of the expansion element 200 forms at least part of the cavity surface of the forward pressure cavity 101 and the second surface 202 of the expansion element 200 forms at least part of the cavity surface of the output cavity 102. The pressure difference between the front pressure chamber 101 and the output chamber 102 is the pressure difference between the two sides of the expansion member 200 corresponding to the first surface 201 and the second surface 202. The greater the pressure differential, the greater the flow rate of the water output by the output chamber 102. The elastic member 300 is disposed in the output cavity 102, and the elastic member 300 abuts against or is connected to the second surface 202 of the expansion member 200, so that the elastic member 300 can provide an elastic force to the expansion member 200. Therefore, the pressure difference is substantially the pressure generated by the elastic member 300 acting on the expansion member 200.

The adjusting member 400 may adjust the degree of deformation of the elastic member 300, that is, the adjusting member 400 may adjust the elastic force of the elastic member 300. Since the pressure applied to the expansion member 200 by the elastic member 300 is equal to the ratio of the elastic force of the elastic member 300 to the area of the expansion member 200, the elastic force of the elastic member 300 is proportional to the pressure applied to the expansion member 200 by the elastic member 300 when the area of the expansion member 200 is unchanged. Therefore, the adjusting member 400 can adjust the elastic force of the elastic member 300 to correspondingly adjust the pressure difference, so as to change the flow rate of the water flow output by the output cavity 102, thereby adjusting the flow rate of the water flow in the constant flow device.

Specifically, in some embodiments, as shown in fig. 2 and 3, the valve body 100 includes a first housing 110 and a second housing 120, and the first housing 110 is connected to the second housing 120. The first housing 110 has the aforementioned front pressure chamber 101, and the second housing 120 has the aforementioned output chamber 102. An orifice 103 may be formed at the connection between the first casing 110 and the second casing 120, or at the first casing 110 or the second casing 120, to communicate the front pressure chamber 101 with the output chamber 102.

In some embodiments, the orifice 103 is a tapered port. That is, the area of the cross section of the orifice 103 gradually increases or decreases in the direction from the front pressure chamber 101 to the output chamber 102, that is, the cross section of the orifice 103 through which the water flows gradually increases or decreases while passing through the orifice 103 in the course of the water flow flowing from the front pressure chamber 101 to the output chamber 102. In the embodiment shown in fig. 3 and 5, the area of the cross section of the orifice 103 is gradually reduced in the direction from the front pressure chamber 101 to the output chamber 102 along the orifice 103.

In some embodiments, as shown in fig. 3 and 5, the constant flow device is further provided with a throttle core 500. The throttle core 500 is disposed through the throttle hole 103. The throttle body 500 has an adjustment head 510. The regulator head 510 is at least partially located at the orifice 103. The regulator head 510 is movable relative to the direction from the forward pressure chamber 101 to the outlet chamber 102 to vary the cross-sectional area of the orifice 103 through which water flows and thus the flow rate of the water.

In the embodiment of the constant flow device having the throttling core 500, both the throttling core 500 and the elastic member 300 can regulate and control the flow rate of the water flow. The setting of regulating part 400 not only can adjust the elasticity of elastic component 300 in order to drive the flow change of rivers, and the setting of regulating part 400 can also adjust the initial deformation state of elastic component 300.

The initial deformation state of the elastic member 300 refers to a deformation state of the elastic member 300 when the water pressure of the front pressure chamber 101 and the water pressure of the output chamber 102 of the constant flow device are both 0. The deformation amount of the elastic member 300 means that the length of the elastic member 300 when it is not compressed is a free length L0, the entire length of the elastic member 300 after compression is L1, and the difference in length between L0 and L1 is X0. X0 is the deformation quantity.

When the adjusting member 400 increases the amount of deformation of the elastic member 300 in the initial deformation state, the adjusting member 400 compresses the elastic member 300. At this time, the minimum working pressure of the constant-flow device can be reduced, so that the constant-flow device can realize the constant flow of the water flow under smaller working pressure. It should be noted here that the operating pressure of the constant flow device refers to: the difference between the pressure of the medium to which the first surface 201 is subjected and the pressure of the medium to which the second surface 202 is subjected. More specifically, the first surface 201 is subjected to a higher medium pressure than the second surface 202.

According to the thin-wall throttling small hole flow formula

When the flow of the water flow flowing out of the constant flow device is calculated, the flow coefficient Cd and the area A of the water outlet are calculated ₁ And the fluid density ρ are constant values. The pressure difference Δ P is the difference between the pressure in the front pressure chamber 101 and the pressure in the output chamber 102.

Since Δ P = P1-P2= K (X) ₀ + Δ X)/A. The stiffness K of the elastic member 300 is constant, and the pressed area a of the first surface 201 and the second surface 202 is constant.Since the fluid pressure in the first surface 201 is greater than and acts on the second surface 202, the elastic member 300 has a superimposed deformation amount Δ X during constant flow. The amount of superimposed deformation DeltaX is smaller than the amount of initial deformation X ₀ . And when the delta P is unchanged, the constant current is realized on the premise that the superposed deformation quantity delta X is smaller than the initial deformation quantity X0. So that Δ P ≈ KX ₀ and/A. It should be noted here that: the aforesaid working pressure being greater than KX only for the constant-flow means ₀ The operating pressure is equal to the elastic force of the elastic member 300. Otherwise, the elastic force of the elastic member 300 is the sum of the working pressure and the supporting force provided by the valve body 100, the pressure difference Δ P is still within a large variation range, and the constant flow device has not yet realized the flow rate constant effect. Therefore, after the adjusting member 400 compresses the elastic member 300, the initial deformation amount X0 is reduced, so that the minimum working pressure of the constant current device can be reduced, that is, the constant current device can achieve the effect of constant current at a lower working pressure.

Since the pressure variation range of the water source or the load is different in different waterways, Δ X has different ranges in different application environments. Under the environment with smaller delta X, the value of X0 is allowed to be adjusted downwards, so that the minimum working pressure of the constant-current device can be properly reduced, and the constant-current device can realize the flow constant effect under lower working pressure under the condition of meeting the basic constant-current precision requirement. Further, since a drop of Δ P is caused after the down-regulation of X0, the flow rate can be made constant at the original predetermined value in conjunction with the regulation of the orifice 103.

As shown in fig. 3, in some embodiments, the joint of the first housing 110 and the second housing 120, the first housing 110 or the second housing 120 defines a receiving hole 104 for receiving the expansion element 200. The extender 200 includes a flexible pad 210. The flexible pad 210 may be in sealing connection with the bore wall of the receiving bore 104. The flexible pad 210 may serve as an active separation boundary of the front pressure chamber 101 from the output chamber 102. The edge of the flexible mat 210 is provided with an edge protrusion, and the edge protrusion may be clamped between the first casing 110 and the second casing 120, in the first casing 110, or in the second casing 120, so that the flexible mat 210 is completely installed.

With continued reference to fig. 3, in some of these embodiments, the extender 200 may further include a piston plate 220. Piston plate 220 is connected to flexible pad 210. Such as piston plate 220, may be attached to the middle of flexible mat 210. Piston plate 220 may be disposed on a side of flexible pad 210 close to front pressure chamber 101, piston plate 220 may also be disposed on a side of flexible pad 210 close to output chamber 102, the number of piston plates 220 may also be two, and two piston plates 220 are disposed on a side of flexible pad 210 close to front pressure chamber 101 and a side close to output chamber 102, respectively. The piston plate 220 may define at least a portion of the shape of the compliant pad 210, and may adjust the direction in which the front pressure chamber 101 and the output chamber 102 act on the pressure of the compliant pad 210.

In the embodiment shown in fig. 3-5, the extender 200 includes a flexible pad 210 and two piston plates 220. Two piston plates 220 are disposed on opposite sides of the expansion member 200. The surface of the piston plate 220 adjacent to the forward pressure chamber 101 serves as the first surface 201 of the expansion element 200. The surface of the piston plate 220 adjacent the output chamber 102 serves as the second surface 202 of the expansion member 200. The resilient member 300 is coupled to the piston plate 220 adjacent the output chamber 102 to facilitate adjustment of the position of the expansion member 200 relative to the valve body 100.

In some embodiments, as shown in fig. 3-5, the piston plate 220 may be provided with a retaining groove 221, and the retaining groove 221 may receive the partial elastic member 300. The retaining groove 221 may be an annular retaining groove 221. The limiting groove 221 is disposed to facilitate limiting the elastic member 300, and reduce relative movement of the elastic member 300 with respect to the piston plate 220.

In some embodiments, the constant flow device further includes a valve spool 800. The valve spool 800 is disposed in the forward pressure chamber 101. At least a portion of the valve spool 800 is coupled to the expansion member 200. When a pressure difference is formed between the front pressure chamber 101 and the output chamber 102, the valve element 800 may move the expansion member 200. The specific construction of the valve cartridge 800 can be selected from those known in the art.

In some embodiments, the resilient member 300 may be a spring. The spring may be a tension spring. One side of the spring abuts or is connected to the expansion member 200 and the other side of the spring is connected to the adjustment member 400. When the adjusting member 400 moves relative to the valve body 100, the adjusting member 400 can compress or extend the spring, i.e., change the deformation state of the spring.

In other embodiments, the elastic member 300 may be made of elastic material such as rubber ball or rubber column.

In some embodiments, as shown in fig. 3-5, adjustment member 400 includes a connecting portion 410 and an adjustment portion 420 connected together. The connection portion 410 is connected to the elastic member 300. The adjustment part 420 is movably connected with the valve body 100. Through the movement of the adjusting part 420, the adjusting part 420 drives the connecting part 410 to move, thereby changing the deformation state of the elastic element 300.

Specifically, in some embodiments, the connection portion 410 may be an annular connection portion 410. Such as a connection 410 that may be circular. The middle portion of the connection portion 410 is connected to the adjustment portion 420. In other embodiments, the connection portion 410 may be a solid connection portion 410, such as a circular, square, or polygonal connection portion 410. The side of the connecting portion 410 away from the elastic member 300 is connected to the adjustment portion 420. The adjusting portion 420 may be connected to the middle portion of the connecting portion 410, so that the movement of the adjusting portion 420 can be facilitated to uniformly drive the connecting portion 410 to move, thereby uniformly connecting the elastic member 300.

In any of the above embodiments, the connection portion 410 and the adjustment portion 420 may be integrally formed, or may be integrally connected after being separately formed, or may be detachably connected, for example, a threaded connection or a snap connection may be selected.

In some implementations, the adjuster 400 further includes a guide 430. The guide portion 430 protrudes from the connection portion 410 in a deformation direction of the elastic member 300. The elastic member 300 is partially sleeved outside the guide portion 430. The above arrangement allows the elastic member 300 to be deformed in the protruding direction of the guide 430 during the elastic deformation process, thereby reducing damage to the elastic member 300 due to the deviation of the deformation direction of the elastic member 300.

In the embodiment shown in fig. 4, the connecting portion 410 of the adjusting member 400 is an annular connecting portion 410. The connecting portion 410 is provided at the middle thereof with a guide portion 430. The guide 430 extends toward the direction of approaching the expansion member 200. The side of the guide portion 430 remote from the expansion element 200 is connected to the adjustment portion 420, thereby connecting the connection portion 410 to the adjustment portion 420.

In another embodiment, the connection 410 is a solid connection 410. A guide portion 430 is coupled to a side of the middle portion of the connecting portion 410 adjacent to the expansion member 200. An adjustment part 420 is connected to the middle part of the connection member on the side away from the expansion member 200.

In some embodiments, the adjuster 400 is also provided with a transition 460. One end of the transition part 460 is connected to the adjustment part 420, and the other end of the transition part 460 may be connected to the connection part 410. If the adjusting member 400 is provided with the guide portion 430, one end of the transition portion 460 may be connected with the adjusting portion 420, and the other end of the transition portion 460 may be connected with the guide portion 430. The transition portion 460 may be provided such that the connection portion 410 or the guide portion 430 is well connected with the adjustment portion 420.

In some embodiments, the valve body 100 is provided with a through hole 121. At least a portion of the regulating portion 420 is located outside the through-hole 121 away from the interior of the valve body 100. Such an arrangement may facilitate movement of the connection part 410 by adjusting the adjustment part 420 located outside the valve body 100.

In some of these embodiments, the adjustment portion 420 is provided with a first adjustment structure 421. The valve body 100 is provided with a second adjustment structure 130. The first regulation structure 421 cooperates with the second regulation structure 130 to movably connect the regulation part 420 with the valve body 100.

In one embodiment, as shown in fig. 3 and 4, the first adjustment structure 421 may be an external thread structure. The second adjustment structure 130 is an internal thread structure. The internal thread structure is matched with the external thread structure. That is, at least a portion of the outer wall of the regulation part 420 is provided with the aforementioned male screw structure, and at least a portion of the inner wall of the through-hole 121 of the valve body 100 is provided with the female screw structure. When the portion of the adjusting member 400 located outside the valve body 100 is rotated, the adjusting member 400 can be moved relative to the position of the valve body 100. The internal and external threads are configured to allow the adjusting member 400 to continuously adjust the deformation degree of the elastic member 300 during the adjustment process. In addition, the structure of the internal thread and the external thread also has a locking function, so that the adjusting piece 400 cannot slide relative to the valve body 100 after the adjusting piece 400 moves to a proper position relative to the valve body 100.

In other embodiments, as shown in fig. 5, the first adjustment structure 421 may be a locking protrusion, and the second adjustment structure 130 may be a plurality of locking grooves arranged along the depth direction of the through hole 121. The depth direction of the hole is the same as the direction of the deformation and expansion of the elastic member 300. The lateral wall of the clamping groove along the hole depth direction is an arc-shaped lateral wall. The arc-shaped side wall can facilitate the clamping protrusion to move from one clamping groove to another clamping groove under the action of external force.

In one embodiment, the number of the clamping protrusions is one, and correspondingly, the second adjusting structure 130 is a set of clamping grooves arranged at intervals along the depth direction of the through hole 121. In another embodiment, the number of the locking protrusions is two or more, and the two or more locking protrusions are circumferentially spaced apart from each other on the outer wall of the adjustment portion 420. It should be noted here that the snap projections can be on the same cross section of the adjustment part 420, and the snap projections can also be on different cross sections of the adjustment member 400. Correspondingly, the second adjusting structures 130 are a plurality of sets of clamping grooves arranged at intervals along the depth direction of the through hole 121. Each group of clamping grooves corresponds to one clamping bulge.

In other embodiments, the first adjusting structure 421 may be a plurality of clamping grooves disposed along the depth direction of the through hole 121, and the second adjusting structure 130 is a clamping protrusion disposed on the inner wall of the through hole 121. The specific setting method can refer to the above contents, and details are not described herein.

In some embodiments, the constant current device further includes a fastener 600, as shown in fig. 1-5. The fastener 600 is movably connected with the adjustment part 420. The fastener 600 is disposed outside the valve body 100. The fastener 600 may reduce the movement of the adjustment part 420 relative to the valve body 100 when the adjustment part 420 is adjusted to a proper position.

In some embodiments, the fastener 600 has a fastening structure 610. As shown in fig. 3 and 4, when the first adjustment structure 421 is an external thread structure and the second adjustment structure 130 is an internal thread structure, the external adjustment member may be a fastening member 600 having an internal thread, and the fastening member 600 may be threadedly coupled to the external thread structure, so as to limit the movement of the adjustment member 400 relative to the valve body 100.

As shown in fig. 5, in some embodiments, when the first adjusting structure 421 is a clamping protrusion and the second adjusting structure 130 is a clamping groove, or the first adjusting structure 421 is a clamping groove and the second adjusting structure 130 is a clamping protrusion, the fastening member 600 may be an annular clamping fastening member 600 sleeved on the adjusting portion 420 and located outside the valve body 100. At least a portion of the outer wall of the annular snap fastener 600 may be attached to the outer surface of the valve body 100. The portion of the adjusting portion 420 located outside the valve body 100 is inserted into the snap ring and is snapped with the annular snap fastener 600, so that the position of the adjusting portion 420 relative to the valve body 100 is unchanged.

As shown in fig. 1 to 5, in some embodiments, a side of the adjustment part 420 located outside the valve body 100 may be provided with a holding part 440. The holding portion 440 can be rotated by a user, so as to move the adjusting portion 420 relative to the valve body 100. In some embodiments, the holding part 440 includes two holding surfaces 441 disposed oppositely. The device of the holding surface 441 can facilitate the user to grasp the holding part 440. For example, in the embodiment shown in fig. 1-4, the cross-sectional shape of the holding surface 441 may be a kidney-like shape or a rectangular shape. In some embodiments, the surfaces of the holding portion 440 other than the holding surface 441, the connecting surface of the holding portion 440 and the adjusting portion 420, and the bottom surface of the holding portion 440 away from the adjusting portion 420 are all arc surfaces. The arrangement of the arc surface can facilitate the user to reduce the injury of the user caused by more edges and corners on the surface of the holding part 440 when the user rotates the holding part 440.

In some embodiments, the valve body 100 is provided with a first stop structure 140. The adjusting member 400 is provided with a second limiting structure 450. The first stopper 140 cooperates with the second stopper 450 to allow the adjusting member 400 to move along the deformation direction of the elastic member 300 during the movement of the adjusting member 400 relative to the valve body 100. The arrangement of the first limiting structure 140 and the second limiting structure 450 can prevent the moving direction of the adjusting member 400 from deviating and causing damage to the elastic member 300.

In some embodiments, the first limiting structure 140 may be a limiting boss. The extending direction of the limiting convex column is consistent with the extending direction of the through hole 121. Correspondingly, the second limiting structure 450 may be a limiting groove for accommodating the limiting boss. In some embodiments, the limiting protrusion is disposed on the sidewall of the first housing 110 having the through hole 121. The guide portion 430 of the adjusting member 400 may be provided with the aforementioned stopper groove. The limiting convex column is at least partially inserted into the limiting groove. When the adjusting piece 400 moves, the limiting convex column moves relative to the limiting groove.

In the embodiment shown in fig. 3-5, the first limiting structure 140 may be an annular limiting boss. The annular limiting convex column is arranged at the through hole 121. That is, the surface of the limiting convex column is surrounded by at least part of the hole wall forming the through hole 121. Correspondingly, the second limiting structure 450 is disposed on the guiding portion 430. The second limiting structure 450 may be an annular limiting groove. The arrangement enables the limiting convex column to move relative to the limiting groove when the adjusting piece 400 moves. In addition, the arrangement can enhance the sealing effect at the through hole 121 and reduce the seepage of water from the through hole 121.

In some embodiments, the constant flow device further includes a seal 700, as shown in fig. 3-5. A seal 700 is disposed between the adjuster 400 and the valve body 100 to reduce water leakage from between the adjuster 400 and the valve body 100. More specifically, the sealing members 700 respectively abut against the adjuster 400 and the valve body 100. In one embodiment, the adjuster 400 is provided with a sealing groove 401. Seal 700 is at least partially received in seal groove 401. The side of the sealing member 700 away from the adjusting member 400 abuts against the wall of the through hole 121. The sealing member 700 may be a sealing ring.

For example, in an embodiment, the sealing groove 401 is opened along the circumferential direction of the regulating portion 420 or the transition portion 460, the sealing member 700 is located in the sealing groove 401, and the side of the sealing member 700 away from the groove bottom of the sealing groove 401 abuts against the hole wall of the through hole 121. In another embodiment, the hole wall of the through hole 121 of the valve body 100 is provided with a seal groove 401. The side of the seal 700 facing away from the seal groove 401 abuts against the adjustment portion 420 or the transition portion 460. In some other embodiments, the adjusting portion 420 or the transition portion 460 is formed with a first sealing half-groove, and the wall of the through hole 121 of the valve body 100 is formed with a second sealing half-groove. The first sealing half groove corresponds to the second sealing half groove, and forms a sealing space for the sealing member 700 to receive. One side of the seal 700 abuts the groove bottom of the first seal half groove, and the other side of the seal 700 abuts the groove bottom of the second seal half groove.

The constant flow device can adjust the initial elasticity of the elastic member 300 through the adjusting member 400, so as to adjust the flow rate of the water flow output by the output cavity 102. In addition, when the constant flow device has the orifice 103 and the throttle core 500 penetrating the orifice 103, the adjusting member 400 can adjust the water flow in the constant flow device simultaneously with the throttle core 500. In addition, in the above case, if the flow is mainly regulated by the flow restriction core 500, the initial compression amount of the elastic member 300 can be adjusted by the regulating member 400, thereby adjusting the minimum operating pressure in the constant flow state.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A constant current device, comprising:

the expansion piece is movably arranged in the valve body and provided with a first surface and a second surface which are opposite, the first surface forms at least part of a cavity surface of the front pressure cavity, and the second surface forms at least part of a cavity surface of the output cavity; the expansion piece is used for moving relative to the valve body to change the volume of the output cavity and the front pressure cavity;

2. The constant flow device according to claim 1, wherein the adjustment member includes a connection portion and an adjustment portion connected to each other, the connection portion being connected to the elastic member, the adjustment portion being movably connected to the valve body.

3. The constant flow device according to claim 2, wherein the adjustment portion is provided with a first adjustment structure and the valve body is provided with a second adjustment structure, the first adjustment structure and the second adjustment structure cooperating to movably connect the adjustment portion with the valve body.

4. The constant current device of claim 3, wherein the first adjustment structure is an external thread structure; the valve body is provided with a through hole, the second adjusting structure is arranged on at least part of the inner wall of the through hole, the second adjusting structure is an internal thread structure, and the internal thread structure is matched with the external thread structure.

5. The constant flow device of claim 2, further comprising a fastener, the fastener being movably coupled to the adjustment portion, the fastener being disposed outside the valve body.

6. The constant current device according to claim 2, wherein the adjustment member further comprises a guide portion protruding from the connection portion along a deformation direction of the elastic member, and the elastic member is partially sleeved outside the guide portion.

7. The constant flow device according to claim 1, wherein the valve body is provided with a first limit structure, and the adjusting member is provided with a second limit structure, and the first limit structure and the second limit structure are matched so that the adjusting member moves along the deformation direction of the elastic member.

8. The constant flow device of claim 1, further comprising a seal disposed between the regulator and the valve body.

9. The constant-current device according to claim 1, wherein the front pressure chamber is communicated with the output chamber through a throttle hole, and a throttle core is arranged at the throttle hole in a penetrating manner and is used for changing the flow area of the throttle hole.

10. A cleaning waterway, comprising the constant flow device of any one of claims 1 to 9.

11. Sanitary installation, characterized in that it comprises a cleaning waterway according to claim 10.