Pulse water outlet device and pedestal pan using same

Abstract

The utility model discloses a pulse water outlet device and discloses a pedestal pan with the pulse water outlet device, the pulse water outlet device comprises a water passing channel, an air suction channel, a rebound cavity and a rectification channel, the water passing channel comprises a negative pressure area capable of forming negative pressure during water passing, the air suction channel is connected with the negative pressure area, and the rebound cavity is connected with the rectification channel. The rebounding cavity is connected between the downstream end of the water passing channel and the upstream end of the rectification channel in the water flow direction, the inner diameter of the downstream end of the water passing channel is A, the inner diameter of the rebounding cavity is B, the inner diameter of the upstream end of the rectification channel is C, and Bgt is met; a, Bgt; c; under the cooperation of the water passing channel, the rebound cavity and the rectification channel, the resistance of forward flow of water vapor circularly changes between increasing and decreasing, water sprayed out of the rectification channel generates oscillation pulses, and finally the pulse washing effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sanitary wares, in particular to a pulse water outlet device and a toilet using the same. Background Art

[0002] Generally, the washing nozzle on the toilet in the market enhances the flushing force by increasing the supply flow of the water supply system, so as to achieve the effect of cleaning the toilet bowl. Such a flushing method not only wastes water resources, but also easily splashes water after the large flow of water impacts the toilet bowl, affecting hygiene. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the above technical problems in the related art to some extent. For this reason, the utility model provides a pulse water outlet device.

[0004] To achieve the above object, the technical solution of the utility model is as follows:

[0005] The utility model also provides a toilet with the above pulse water outlet device.

[0006] The pulse water outlet device according to the first aspect embodiment of the utility model includes a water passing channel, an air suction channel, a rebound cavity and a rectifying channel. The water passing channel includes a negative pressure area that can form a negative pressure when water passes through. The air suction channel is communicated with the negative pressure area. Along the water flow direction, the rebound cavity is located between the downstream end of the water passing channel and the upstream end of the rectifying channel. The inner diameter of the downstream end of the water passing channel is A, the inner diameter of the rebound cavity is B, and the inner diameter of the upstream end of the rectifying channel is C, which satisfies B > A > C. The maximum injection range of the liquid when the water passing channel enters the negative pressure area from the upstream is not greater than the inner diameter of the downstream end of the water passing channel and not less than the inner diameter of the upstream end of the rectifying channel.

[0007] The pulse water outlet device according to the embodiment of the utility model has at least the following beneficial effects: With the cooperation of the water passing channel, the rebound cavity and the rectifying channel, the resistance of the forward flow of water and gas changes cyclically between becoming larger and smaller, realizing the generation of oscillating pulses of the water ejected from the rectifying channel, and finally realizing the pulse flushing effect.

[0008] According to some embodiments of the present utility model, it further includes a water inlet pipe, a flow-through pipe, and a rectifying pipe connected in sequence. An inlet water channel is provided inside the water inlet pipe. A negative pressure area is formed in the flow-through pipe. A flow dividing member is provided between the water inlet pipe and the flow-through pipe. A plurality of flow dividing holes are formed in the flow dividing member. The flow dividing holes and the inside of the flow-through pipe together form the water passing channel. Wherein the maximum distance dimension between the flow dividing holes that are relatively farthest from each other in the radial direction is D, and it satisfies: D≤A, D>C. The air suction channel is opened on the side wall of the flow-through pipe at the position where the negative pressure area is located. A rebound cavity is defined between the flow-through pipe and the rectifying pipe. A rectifying channel is formed in the rectifying pipe.

[0009] According to some embodiments of the present utility model, a first channel and the rectifying channel are provided inside the rectifying pipe. The inner diameter of the first channel is larger than the inner diameter of the rectifying channel. The transition position between the first channel and the rectifying channel is in a stepped shape. One end of the flow-through pipe is inserted into the first channel. The first channel between the downstream end of the flow-through pipe and the upstream end of the rectifying channel is the rebound cavity.

[0010] According to some embodiments of the present utility model, a negative pressure area and a second channel are provided inside the flow-through pipe. The flow dividing member is provided at the end of the negative pressure area away from the second channel. The inner diameter of the negative pressure area is larger than the inner diameter of the second channel.

[0011] According to some embodiments of the present utility model, the second channel includes a first section and a second section. The first section is provided between the negative pressure area and the second section. The first section is in a gradually narrowing constricted shape from the negative pressure area towards the second section. One end of the second section away from the first section is the downstream end of the water passing channel.

[0012] According to some embodiments of the present utility model, a first connecting post protruding radially is provided on the outer wall of the flow-through pipe. The air suction channel is opened in the first connecting post. A first clamping opening is provided at one end of the water inlet pipe. One end of the water inlet pipe is sleeved on the flow-through pipe. The first clamping opening is clamped on the first connecting post.

[0013] According to some embodiments of the present utility model, a first step is provided inside one end of the flow-through pipe. The flow dividing member is in a plate shape and is lapped on the first step. A second step is provided inside one end of the water inlet pipe. The flow dividing member is clamped between the second step and the first step.

[0014] According to some embodiments of the present utility model, a second connecting post protruding radially is provided on the outer wall of the flow-through pipe. A second clamping opening is provided at one end of the rectifying pipe. One end of the rectifying pipe is sleeved on the flow-through pipe. The second clamping opening is clamped on the second connecting post.

[0015] According to some embodiments of the present utility model, a branch pipe communicating with the water inlet channel is provided on the water inlet pipe.

[0016] The toilet according to the second aspect embodiment of the present utility model includes a pulsed water outlet device.

[0017] The toilet according to the embodiment of the present utility model has at least the following beneficial effects: the pulsed water formed by the pulsed water outlet device impacts and washes the toilet bowl from multiple angles in all directions, effectively improving the cleaning effect. Compared with the ordinary Venturi tube structure where the water vapor mixture is not sufficient and a bubble sheet needs to be added to generate bubble water, the present utility model can achieve a sufficient mixing effect of the water vapor through multiple rebounds of the water vapor itself. When the water vapor mixture impacts on the toilet bowl, splashing can be avoided; when used in conjunction with the foam shield, the foaming agent can also be fully mixed with gas and foamed by means of multiple rebounds in the pulsed water outlet device, and the formed foam is ejected into the toilet bowl in a pulsed foaming manner, which can efficiently increase the foaming amount of the foam shield.

[0018] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0020] Figure 1 is a schematic structural diagram of the pulsed water outlet device;

[0021] Figure 2 is Figure 1 the exploded structural diagram of

[0022] Figure 3 is Figure 1 the internal structural diagram of

[0023] Figure 4 is Figure 3 the exploded structural diagram of

[0024] Figure 5 is Figure 3 the water vapor flow diagram of

[0025] Figure 6 is a schematic diagram of the flow dividing member;

[0026] Figure 7 is Figure 3 another embodiment diagram of

[0027] Figure 8It is a schematic diagram of the application of the pulse water outlet device on a toilet bowl.

[0028] Reference numerals: water passing channel 101; air suction channel 102; rebound cavity 103; rectifying channel 104; negative pressure area 105; water inlet pipe 200; water inlet channel 210; first clamping opening 220; second step 230; flow-through pipe 300; second channel 310; first section 311; second section 312; first connecting column 330; first step 340; second connecting column 350; rectifying tube 400; first channel 410; second clamping opening 420; flow dividing member 500; flow dividing holes 510; branch pipe 600. Detailed implementation manners

[0029] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0030] The present invention relates to a pulse water outlet device, which includes a water passing channel 101, an air suction channel 102, a rebound cavity 103 and a rectifying channel 104.

[0031] Such as Figure 1 , Figure 2 and Figure 3As shown, the water passage 101, the rebound chamber 103, and the rectifying passage 104 can be sequentially distributed and connected on the same axis. The interior of the water passage 101 includes a negative pressure area 105, which forms a negative pressure when the water passage 101 is filled with water. The suction passage 102 is communicated with the negative pressure area 105, and the negative pressure area 105 is communicated with the external environment through the suction passage 102, or the negative pressure area 105 can be connected to an external air supply device through the suction passage 102. One or more suction passages 102 can be provided, and multiple suction passages 102 ensure the suction volume. The water passage 101 can be composed of a conventional Venturi tube. Inside the Venturi tube, along the water flow direction, there are a constriction section, a throat section, a flare section, and a mixing section in sequence, and the negative pressure area 105 is formed at the throat section. When the negative pressure area 105 forms a negative pressure, it can suck the air in the external environment into the negative pressure area 105 through the suction passage 102. Along the water flow direction, water flows through the water passage 101, the rebound chamber 103, and the rectifying passage 104 in sequence. The rebound chamber 103 is located between the downstream end of the water passage 101 and the upstream end of the rectifying passage 104. Among them, the inner diameter of the downstream end of the water passage 101 is A, the inner diameter of the rebound chamber 103 is B, and the inner diameter of the upstream end of the rectifying passage 104 is C, and they satisfy B > A > C. Due to the instantaneous reduction in space from the rebound chamber 103 to the rectifying passage 104, there will be a blocking effect on the water at the transition position between the rebound chamber 103 and the rectifying passage 104, resulting in the water rebounding and flowing back towards the water passage 101 in the rebound chamber 103. In addition, for the liquid entering the negative pressure area 105 from the upstream of the water passage 101, the maximum injection range of the liquid is not greater than the inner diameter of the downstream end of the water passage 101, and it can be that the liquid is tangent to the inner wall of the water passage 101 at the downstream side of the negative pressure area 105 from the negative pressure area 105. And the maximum injection range of the liquid is not less than the inner diameter of the upstream end of the rectifying passage 104. This can reduce the resistance of the liquid flowing from the negative pressure area 105 to the downstream end of the water bucket 101, and after entering the rebound chamber 103, part of the liquid will impact the upstream end of the rectifying passage 104 to form a rebound.

[0032] During actual use, such as Figure 5As shown in the figure, water enters the water passage 101. When flowing through the negative pressure area 105, a negative pressure is formed. The negative pressure area 105 sucks the air in the external environment into the negative pressure area 105 through the air suction passage 102. The air and water are mixed in the water passage 101 to form a fluid. When the fluid flows from the negative pressure area 105 towards the downstream end of the water passage 101, the fluid can directly pass through the downstream section of the water passage 101 and enter the rebound chamber 103. Part of the water vapor impacts the upstream end of the rectifying passage 104 after passing through the rebound chamber 103 and rebounds into the downstream end of the water passage 101, where the water vapor is mixed at the downstream end of the water passage 101. After mixing, it re-enters the rebound chamber 103 and flows into the rectifying passage 104, and finally sprays out from the downstream end of the rectifying passage 104. At the initial stage of water flow, due to the increase in the internal negative pressure of the negative pressure area 105, the air intake increases, and both the flow rate and the average flow rate increase. The flow rate of the water vapor rebounding back into the water passage 101 after entering the rebound chamber 103 is relatively large, resulting in an increase in the forward flow resistance of the liquid (the direction of water flowing from the water passage 101 to the rectifying passage 104 is the forward direction). After the forward flow resistance increases, the flow rate of water towards the downstream end of the water passage 101 slows down, the negative pressure in the negative pressure area 105 decreases, and the air intake decreases, causing the flow rate and flow volume of the water vapor entering the rebound chamber 103 to decrease, and thus the water vapor rebounding back into the return passage decreases, and the forward flow resistance of the liquid decreases. At this time, the forward flow velocity of the water vapor becomes faster again. At this time, the negative pressure effect in the negative pressure area 105 becomes larger again, resulting in an increase in the air intake. After the air intake increases, the above state of the increase in the forward flow resistance is repeated. In this way, the forward flow resistance of the water vapor is cyclically changed between increasing and decreasing, and the water sprayed out from the rectifying passage 104 generates oscillating pulses, ultimately achieving the pulse flushing effect. The pulse water outlet device can be applied to water-using devices such as faucets and shower heads. The present utility model also relates to a toilet, as Figure 8 shown, the toilet applies the pulse water outlet device. The pulse water outlet device can be connected to the water tank on the toilet. The pulse water formed by the pulse water outlet device flushes the toilet bowl, effectively improving the cleaning effect. There is no need to increase the water supply flow rate to increase the flushing force, reducing the waste of water resources by the product, and the water vapor mixture can avoid splashing when impacting on the toilet bowl. It can also be that the pulse water outlet device can be connected to the foam shield on the toilet. The foaming agent can be fully mixed with air and foamed in the pulse water outlet device, and the formed foam is sprayed into the toilet bowl in a pulsed foaming manner, which can efficiently increase the foaming amount of the foam shield.

[0033] In some embodiments of the present utility model, such as Figure 2 、 Figure 3 and Figure 4As shown, the pulsed water outlet device further includes a water inlet pipe 200, a flow-through pipe 300, and a rectifying pipe 400 that are connected in sequence. An inner part of the water inlet pipe 200 is provided with a water inlet channel 210. The water inlet channel 210 can be set in a cylindrical shape, or can be set in a flared shape that gradually increases from the upstream end of the water inlet pipe 200 towards the flow-through pipe 300 as shown in the figure. A negative pressure area 105 is formed in the flow-through pipe 300. A flow splitting member 500 is provided between the water inlet pipe 200 and the flow-through pipe 300. In this embodiment, the flow splitting member 500 is set in a circular plate shape and is adapted to the shape of the upstream end of the flow-through pipe 300. The flow splitting member 500 can also be set in a block shape or other shapes. The flow splitting member 500 can also be integrally formed at the upstream end of the flow-through pipe 300. A plurality of flow splitting holes 510 are formed in the flow splitting member 500. The number of the flow splitting holes 510 can be set to two, three or more. The shapes of the flow splitting holes 510 can be various regular shapes such as circular, square, polygonal, or other irregular shapes. The inner diameter of the downstream end of each flow splitting hole 510 is smaller than the inner diameter of the downstream end of the water inlet channel 210, and the total radial cross-sectional area of each flow splitting hole 510 is smaller than the radial cross-sectional area of the downstream of the water inlet channel 210. One end of each flow splitting hole 510 is communicated with the downstream end of the water inlet channel 210, and the other end is communicated with the negative pressure area 105. Each flow splitting hole 510 and the inside of the flow-through pipe 300 together form a water flow channel 101. Among them, the maximum distance dimension between the relatively farthest flow splitting holes 510 in the radial direction is D, which satisfies: D≤A, D>C. As Figure 6 As shown, a plurality of flow splitting holes 510 are distributed on the flow splitting member 500 along a virtual circumference. The diameter dimension of the virtual circumference is D, and the diameter of the virtual circumference is the maximum distance dimension D between the flow splitting holes 510. This dimension is set in this way so that when water enters the negative pressure area 105 through each flow splitting hole 510 and flows towards the downstream end of the water flow channel 101, the axial impact and rebound between the water and the inner wall of the water flow channel 101 are reduced, so that the water and gas flow axially towards the downstream end of the water flow channel 101.

[0034] The intake passage 102 is opened on the side wall of the flow-through pipe 300 and corresponds to the position of the negative pressure area 105. A rebound chamber 103 is defined between the flow-through pipe 300 and the rectifying pipe 400, and the rectifying passage 104 is formed in the rectifying pipe 400. During use, water enters the water inlet passage 210 from the upstream end of the water inlet pipe 200. After the water is shunted through each shunt hole 510 in the water inlet passage 210, it is delivered to the negative pressure area 105. When the water flows through the water inlet passage 210, the shunt holes 510, the negative pressure area 105, and the rebound chamber 103, a Venturi effect is generated, and a negative pressure is formed in the negative pressure area 105 to achieve air intake. The arrangement of the shunt holes 510 can shunt and disperse the water, and a relatively large negative pressure can be formed in the negative pressure area 105. At the same time, the shunt member 500 can have a certain blocking effect on the water vapor flowing back from the rebound chamber 103, ensuring that the resistance to the forward flow of the water vapor changes cyclically between increasing and decreasing. In a common Venturi structure, the flow rate needs to be reduced by shrinking the aperture to increase the negative pressure and thus increase the air intake. However, in this embodiment, a shunt member is provided, and the shunt member can achieve a large air intake while ensuring a large flow rate.

[0035] Wherein, a first passage 410 and a rectifying passage 104 are provided inside the rectifying pipe 400. The first passage 410 and the rectifying passage 104 are coaxially arranged and communicate with each other. The inner diameter of the first passage 410 is larger than the inner diameter of the rectifying passage 104, and the transition position between the first passage 410 and the rectifying passage 104 is stepped. The downstream end of the flow-through pipe 300 is inserted into the first passage 410, and a sealing ring can be installed between them for sealing. The transition position between the downstream end of the flow-through pipe 300 and the first passage 410 is also stepped. The space between the downstream end of the flow-through pipe 300 and the upstream end of the rectifying passage 104 in the first passage 410 constitutes the rebound chamber 103. The inner diameters at various positions in the rebound chamber 103 are equal, and the inner diameters at various positions in the rectifying passage 104 are equal. After the water enters the rebound chamber 103 from the flow-through passage, it impacts on the table surface at the stepped position of the rebound chamber 103 and the rectifying passage 104, and the water vapor rebounds and flows back in the direction of the water passage 101.

[0036] In some specific embodiments of the present invention, such as Figure 2 and Figure 3 shown, the inside of the flow-through pipe 300 is successively divided into a negative pressure area 105 and a second passage 310. The negative pressure area 105 and the second passage 310 are coaxially arranged. The shunt member 500 is installed at the end of the negative pressure area 105 far from the second passage 310. The inner diameter of the negative pressure area 105 is larger than the inner diameter of the second passage 310, ensuring that the space expands instantaneously after the water passes through the shunt member 500 to form a negative pressure. The second passage 310 can be set to have an equal diameter everywhere. The maximum injection range of the liquid when the water passage 101 enters the negative pressure area 105 from the upstream is not greater than the inner diameter of the second passage 310. The flow-through pipe 300 is inserted into the rectifying pipe 400. It can also be, as Figure 7As shown, the second channel 310 includes a first section 311 and a second section 312. The first section 311 is disposed between the negative pressure zone 105 and the second section 312. The first section 311 is in a shape of a gradually narrowing neck from the negative pressure zone 105 towards the second section 312, that is, the axial cross-section of the first section 311 is conical. The end of the second section 312 away from the first section 311 is the downstream end of the water passage 101. The inner diameter of the first section 311 is greater than the maximum injection range of the liquid. The setting of the first section 311 can eliminate or reduce the radial impact when water enters the second channel 310 from the negative pressure section 105 against the inner wall of the second channel 310. After the water vapor rebounds from the rebound cavity 103, it mixes in the second section 312 and forms a flow resistance.

[0037] In some specific embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the outer wall of the flow-through pipe 300 is provided with a first connecting post 330 protruding radially. The position where the first connecting post 330 is located is aligned with the negative pressure zone 105. The suction channel 102 is opened in the first connecting post 330. One end of the water inlet pipe 200 is provided with a first clamping opening 220, and the first clamping opening 220 is arranged in a C-shaped notch from the downstream end of the water inlet pipe 200. The downstream end of the water inlet pipe 200 is sleeved on the upstream end of the flow-through pipe 300, and the first clamping opening 220 is clamped on the first connecting post 330, thereby relatively fixing the water inlet pipe 200 and the flow-through pipe 300. A sealing ring can be installed between the inner wall of the downstream end of the water inlet pipe 200 and the outer wall of the upstream end of the flow-through pipe 300 for sealing. The cooperation between the first clamping opening 220 and the first connecting post 330 is used for fixing between the water inlet pipe 200 and the flow-through pipe 300 on the one hand, and can limit the axial insertion depth of the water inlet pipe 200 relative to the flow-through pipe 300 on the other hand, and can ensure that the water inlet pipe 200 does not block the suction channel 102 after installation, ensuring smooth suction of the suction channel 102.

[0038] Furthermore, as Figure 3 and Figure 4 As shown, a first step 340 is provided inside the upstream end of the flow-through pipe 300, and the shunt member 500 is lap-jointed on the first step 340 in a plate shape. The outer contour shape of the shunt member 500 is adapted to the inner wall shape of the upstream end of the flow-through pipe 300. A second step 230 is provided inside one end of the water inlet pipe 200. After the water inlet pipe 200 is sleeved on the flow-through pipe 300, the shunt member 500 is clamped between the second step 230 and the first step 340, thereby fixing the shunt member 500.

[0039] Such as Figure 2As shown, the outer wall of the overcurrent pipe 300 is provided with a second connecting column 350 protruding radially. The position where the second connecting column 350 is located can be aligned with the second channel 310. The upstream end of the rectifying tube 400 is provided with a second clamping opening 420 in the shape of a C-shaped notch. One end of the rectifying tube 400 is sleeved on the overcurrent pipe 300, and the second clamping opening 420 is clamped on the second connecting column 350, thereby relatively fixing the rectifying tube 400 and the overcurrent pipe 300, and at the same time, it can limit the insertion depth of the overcurrent pipe 300 relative to the rectifying tube 400, ensuring the axial dimension of the formed rebound cavity 103.

[0040] In some embodiments of the present invention, as Figure 1 , Figure 2 and Figure 8 shown, the outer wall of the rectifying tube 400 is provided with an external thread. The pulsed water outlet device can be installed on the toilet through the external thread on the rectifying tube 400.

[0041] Among them, as shown in the figure, a branch pipe 600 communicating with the water inlet channel 210 is provided on the water inlet pipe 200. The branch pipe 600 can extend outward from the outer wall of the water inlet pipe 200. The branch pipe 600 is used to connect the foam shield on the toilet, and the foam agent of the foam shield is input into the water inlet pipe 200 through the branch pipe 600 to be mixed with water, and finally forms a pulsed effect for spraying and use. Compared with the foaming structure of the conventional foam shield, under the action of the rebound pulse of the rebound cavity 103, the foam agent can be fully foamed, and less foam agent is only needed under the same foaming amount.

[0042] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0045] In the description of this specification, the description with reference to terms such as "some specific embodiments" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0046] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A pulsed water outlet device, characterized in that: It includes a water passage (101), an air intake passage (102), a rebound cavity (103) and a rectification passage (104). The water passage (101) includes a negative pressure area (105) that can form a negative pressure when water passes through. The air intake passage (102) is communicated with the negative pressure area (105). Along the water flow direction, the rebound cavity (103) is located between the downstream end of the water passage (101) and the upstream end of the rectification passage (104). The inner diameter of the downstream end of the water passage (101) is A, the inner diameter of the rebound cavity (103) is B, and the inner diameter of the upstream end of the rectification passage (104) is C, and it satisfies B > A > C. The maximum injection range of the liquid when the water passage (101) enters the negative pressure area (105) from the upstream is not greater than the inner diameter of the downstream end of the water passage (101) and not less than the inner diameter of the upstream end of the rectification passage (104).

2. The pulsed water outlet device according to claim 1, wherein: It further includes a water inlet pipe (200), a flow-through pipe (300) and a rectification pipe (400) connected in sequence. An inner water inlet passage (210) is provided inside the water inlet pipe (200). The negative pressure area (105) is formed in the flow-through pipe (300). A flow dividing member (500) is provided between the water inlet pipe (200) and the flow-through pipe (300). A plurality of flow dividing holes (510) are formed on the flow dividing member (500). The flow dividing holes (510) and the inside of the flow-through pipe (300) together form the water passage (101). The maximum distance dimension between the relatively farthest flow dividing holes (510) in the radial direction is D, and it satisfies: D ≤ A, D > C. The air intake passage (102) is opened on the side wall of the flow-through pipe (300) at the position where the negative pressure area (105) is located. The rebound cavity (103) is defined between the flow-through pipe (300) and the rectification pipe (400). The rectification passage (104) is formed in the rectification pipe (400).

3. The pulse water discharging device according to claim 2, characterized in that: A first passage (410) and the rectification passage (104) are provided inside the rectification pipe (400). The inner diameter of the first passage (410) is larger than the inner diameter of the rectification passage (104). The transition position between the first passage (410) and the rectification passage (104) is stepped. One end of the flow-through pipe (300) is inserted into the first passage (410). The first passage (410) between the downstream end of the flow-through pipe (300) and the upstream end of the rectification passage (104) is the rebound cavity (103).

4. The pulse water outlet device according to claim 3, characterized in that: The negative pressure area (105) and a second passage (310) are separately provided inside the flow-through pipe (300). The flow dividing member (500) is arranged at the end of the negative pressure area (105) away from the second passage (310). The inner diameter of the negative pressure area (105) is larger than the inner diameter of the second passage (310).

5. The pulse water outlet device according to claim 4, characterized in that: The second channel (310) includes a first section (311) and a second section (312). The first section (311) is disposed between the negative pressure zone (105) and the second section (312). The first section (311) is in a shape of a gradually narrowing neck from the negative pressure zone (105) towards the second section (312). One end of the second section (312) away from the first section (311) is the downstream end of the water passing channel (101).

6. The pulse water outlet device according to claim 2, characterized in that: The outer wall of the flow-through pipe (300) is provided with a first connecting post (330) protruding radially. The suction channel (102) is opened in the first connecting post (330). One end of the water inlet pipe (200) is provided with a first clamping opening (220). One end of the water inlet pipe (200) is sleeved on the flow-through pipe (300), and the first clamping opening (220) is clamped on the first connecting post (330).

7. The pulse water discharging device according to claim 6, characterized in that: One end inside the flow-through pipe (300) is provided with a first step (340). The flow dividing member (500) is lapped on the first step (340) in a plate shape. One end inside the water inlet pipe (200) is provided with a second step (230). The flow dividing member (500) is clamped between the second step (230) and the first step (340).

8. The pulsed water outlet device according to claim 2, wherein: The outer wall of the flow-through pipe (300) is provided with a second connecting post (350) protruding radially. One end of the rectifying pipe (400) is provided with a second clamping opening (420). One end of the rectifying pipe (400) is sleeved on the flow-through pipe (300), and the second clamping opening (420) is clamped on the second connecting post (350).

9. The pulse water outlet device according to claim 2, wherein: A branch pipe (600) communicating with the water inlet channel (210) is provided on the water inlet pipe (200).

10. A toilet, characterized in that: Including the pulse water outlet device according to any one of claims 1 to 9.

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