Pump housing structure, drainage pump and water tank

Abstract

The present invention provides a pump housing structure, a drainage pump and a water tank, relating to the technical field of kitchen appliances. The pump housing structure includes a main housing and a noise reduction housing. An inlet and an outlet are provided on the main housing, and a noise reduction cavity is provided on the noise reduction housing. The outlet is communicated with the noise reduction cavity, and the cross-sectional area of the noise reduction cavity is larger than that of the outlet. After the water flow is discharged from the main housing and enters the noise reduction housing, since the cross-sectional area of the noise reduction cavity of the noise reduction housing is larger than that of the outlet, the flow path of the water flow becomes wider, and the flow velocity of the water flow decreases when it enters the noise reduction cavity from the outlet. This reduces the velocity difference from low speed to high speed when the water flow flows from the pump housing (main housing) into the outlet pipe, and reduces the flow velocity of the water flow at this place, thereby reducing the water flow sound and reducing the noise of the drainage pump using this pump housing structure.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and more particularly to a pump housing structure, a drainage pump and a sink. Background Art

[0002] A sink is a common appliance in the kitchen, such as the sink of a dishwasher. In order to facilitate the drainage of water from the sink, some sinks are equipped with a drainage pump, which is generally a centrifugal drainage pump that sucks water up from below by the vacuum generated by the impeller and then pumps it to a higher place. At present, most drainage pumps are directly installed on the sink through a fixing seat, and the drainage pump is in direct contact with the fixing seat. The vibration generated when the drainage pump works is directly transmitted to the whole machine connected to the sink through the fixing seat, causing resonance in other parts of the whole machine and generating large vibrations, thus affecting the overall quality of the product. In addition, the noise of the drainage pump during drainage is relatively large. On the one hand, the drainage pump is a centrifugal drainage pump. When the water in the container is about to be drained out, the impeller will be exposed to the air. At this time, the impeller only sucks in air, and the outlet pipe of the drainage pump is often higher than the impeller. Since the specific gravity of water is much greater than that of air, the water in the outlet pipe will fall back to the impeller of the drainage pump. When the falling water fills the impeller and the pump housing of the drainage pump, it will be drained into the outlet pipe again. Repeating like this will generate gurgling noises, and this sound is relatively large, seriously affecting the use experience. On the other hand, due to the relatively fast water flow speed in the outlet pipe of the centrifugal drainage pump, and there is a flow rate difference from low speed to high speed when the water flow from the pump housing to the outlet pipe, which causes a relatively large water flow sound and generates water flow noise. Summary of the Invention

[0003] The purpose of the present invention is to provide a pump housing structure, a drainage pump and a sink to solve the technical problem in the prior art that there is a flow rate difference from low speed to high speed when the water flow of the drainage pump flows from the pump housing to the outlet pipe, resulting in a relatively large water flow sound and generating water flow noise.

[0004] The pump housing structure provided by the present invention includes a main housing and a noise reduction housing. An inlet and an outlet are provided on the main housing, a noise reduction cavity is provided on the noise reduction housing, the outlet is communicated with the noise reduction cavity, and the cross-sectional area of the noise reduction cavity is larger than the cross-sectional area of the outlet.

[0005] Further, the cross-sections of the outlet and the noise reduction cavity are both circular, and the diameter of the noise reduction cavity is larger than the diameter of the outlet.

[0006] Further, the pump housing structure further includes a floating sealing mechanism, and the floating sealing mechanism is arranged in the noise reduction cavity;

[0007] In the natural state, the floating seal mechanism cooperates with the inner wall of the noise reduction chamber on the side close to the water inlet to seal the water outlet; in the state of pumping water, the floating seal mechanism is separated from the inner wall of the noise reduction chamber under the action of water pressure to form a water flow gap.

[0008] Further, the floating seal mechanism includes an elastic member and a seal body connected to the elastic member. The elastic member has a tendency to make the seal body abut against the inner wall of the noise reduction chamber to seal the water outlet. Under the action of water pressure, the seal body can overcome the elastic force of the elastic member and separate from the inner wall of the noise reduction chamber.

[0009] Further, the elastic member is a spring. The first end of the spring is connected to the inner wall of the noise reduction chamber through a bracket, and the second end of the spring is connected to the seal body.

[0010] Further, the noise reduction housing includes a noise reduction main housing and a connection housing. The noise reduction main housing is detachably connected to the connection housing. The noise reduction main housing is connected to the water outlet. The connection housing is used to connect to the water outlet pipe, and the bracket is connected to the connection housing.

[0011] Further, the noise reduction chamber includes a through first chamber and a second chamber. One end of the first chamber far from the second chamber is close to the water outlet and is connected to the water outlet. In the direction from the water outlet to the second chamber, the first chamber gradually expands outward to form a flared opening. The second chamber is arranged in alignment with one end of the first chamber close to the second chamber;

[0012] The inner wall of the first chamber forms a sealing surface, and the seal body cooperates with and abuts against the sealing surface to seal the water outlet.

[0013] Further, the seal body is spherical, and the circumferential direction of the inner wall of the first chamber is arranged in an arc shape.

[0014] Further, the connection housing gradually contracts inward in the direction away from the main housing, and the contraction end of the connection housing is connected to the water outlet pipe;

[0015] and / or,

[0016] A sealing gasket is arranged between the connection housing and the noise reduction main housing.

[0017] Further, a noise reduction connecting pipe is connected to the water inlet.

[0018] Further, the noise reduction connecting pipe includes an inner pipe forming a water flow channel, and a plurality of noise reduction diaphragms are sequentially arranged at intervals along the extension direction of the inner pipe on the inner wall of the inner pipe.

[0019] Further, the noise reduction diaphragm can vibrate under the action of the sound waves generated by the drainage pump.

[0020] Further, an outer tube is sleeved outside the inner tube, and a plurality of noise reduction holes are provided on the outer tube.

[0021] Further, the material of the noise reduction connecting pipe is an elastic material;

[0022] and / or

[0023] the inner diameter of the noise reduction connecting pipe is greater than the inner diameter of the water inlet;

[0024] and / or

[0025] a step recessed outward is provided at the bottom of the inner wall of the noise reduction connecting pipe near one end of the water inlet, and the water inlet is sleeved at the step.

[0026] The drainage pump provided by the present invention includes the pump housing structure described above.

[0027] The sink provided by the present invention includes a tank body and the pump housing structure or the drainage pump installed on the tank body;

[0028] A drainer is provided on the tank body, and the water inlet is communicated with the drain outlet of the drainer.

[0029] Further, a mounting bracket is provided on the tank body, the pump housing structure is installed on the mounting bracket through a transition plate, and the material of the transition plate is an elastic material.

[0030] The pump housing structure provided by the present invention includes a main housing and a noise reduction housing. An inlet and an outlet are provided on the main housing, a noise reduction cavity is provided on the noise reduction housing, the outlet is communicated with the noise reduction cavity, and the cross-sectional area of the noise reduction cavity is larger than the cross-sectional area of the outlet. The water flow of the pump housing structure of the present invention enters the noise reduction housing after being discharged from the main housing. Since the cross-sectional area of the noise reduction cavity of the noise reduction housing is larger than the cross-sectional area of the outlet, the flow path of the water flow becomes wider, and the flow velocity of the water flow decreases when it enters the noise reduction cavity from the outlet, reducing the velocity difference of the water flow from low speed to high speed when flowing from the pump housing (main housing) into the outlet pipe, and reducing the flow velocity of the water flow at this place, thereby reducing the water flow sound and reducing the noise of the drainage pump using this pump housing structure.

[0031] The drainage pump of the present invention includes the pump housing structure provided by the present invention, and has the same beneficial effects as the pump housing structure provided by the present invention. For specific analysis, reference can be made to the description of the beneficial effects of the pump housing structure of the present invention, which will not be repeated here.

[0032] The water tank of the present invention includes a tank body and the pump housing structure or the drainage pump provided by the present invention installed on the tank body, which has the same beneficial effects as the pump housing structure provided by the present invention. For specific analysis, reference can be made to the description of the beneficial effects of the pump housing structure of the present invention, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 Partial schematic diagram of the pump housing structure provided by the embodiment of the present invention;

[0035] Figure 2 Another partial schematic diagram of the pump housing structure provided by the embodiment of the present invention;

[0036] Figure 3 Schematic diagram of the noise reduction connecting pipe of the pump housing structure provided by the embodiment of the present invention;

[0037] Figure 4 For Figure 3 front view;

[0038] Figure 5 Axonometric schematic diagram of the water tank provided by the embodiment of the present invention;

[0039] Figure 6 For Figure 5 front view;

[0040] Figure 7 For Figure 5 right view;

[0041] Figure 8 For Figure 5 sectional view.

[0042] Reference numerals: 100 - tank body; 200 - drainer; 300 - noise reduction connecting pipe; 301 - inner pipe; 302 - noise reduction diaphragm; 303 - outer pipe; 304 - step; 400 - mounting bracket; 500 - transition plate; 600 - drainage pump; 610 - pump main body; 621 - main housing; 622 - water inlet; 623 - water outlet; 630 - noise reduction housing; 631 - noise reduction cavity; 6311 - second cavity; 6312 - first cavity; 632 - noise reduction main housing; 700 - water outlet pipe; 701 - connecting housing; 702 - seal; 703 - spring; 704 - bracket; 800 - gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0044] Embodiment

[0045] As Figures 1 to 8 shown, this embodiment provides a pump housing structure, including a main housing 621 and a noise reduction housing 630. An inlet 622 and an outlet 623 are provided on the main housing 621, and a noise reduction cavity 631 is provided on the noise reduction housing 630. The outlet 623 is communicated with the noise reduction cavity 631, and the cross-sectional area of the noise reduction cavity 631 is larger than the cross-sectional area of the outlet 623.

[0046] The water flow of the pump housing structure in this embodiment enters the noise reduction housing 630 after being discharged from the main housing 621. Since the cross-sectional area of the noise reduction cavity 631 of the noise reduction housing 630 is larger than the cross-sectional area of the outlet 623, the flow path of the water flow becomes wider, and the flow velocity of the water flow decreases when it enters the noise reduction cavity 631 from the outlet 623. The velocity difference of the water flow from low speed to high speed when it flows from the pump housing (main housing 621) to the outlet pipe 700 is reduced, and the flow velocity of the water flow at this place is reduced, thereby reducing the water flow sound and reducing the noise of the drainage pump 600 using this pump housing structure.

[0047] Specifically, the cross-sections of the outlet 623 and the noise reduction cavity 631 are both circular, and the diameter of the noise reduction cavity 631 is larger than the diameter of the outlet 623. As Figure 1 shown, the outlet 623 is a circular pipe protruding outward on the main housing 621, the noise reduction cavity 631 is generally a cylindrical barrel, and the outer peripheral surface of the noise reduction housing 630 is the same as the inner wall shape of the noise reduction cavity 631.

[0048] It can be understood that when the water flow in the main housing 621 of the existing drainage pump 600 quickly passes through the outlet 623, a relatively large water flow sound will be generated. Since the amount of water flowing through the outlet 623 and the noise reduction cavity 631 is the same, and the diameter of the noise reduction cavity 631 is larger than the diameter of the outlet 623, the flow velocity in the pipe with a larger cross-sectional area will be lower than the flow velocity in the pipe with a smaller cross-sectional area under the condition of different cross-sectional areas, reducing the flow velocity, thereby reducing the water flow sound. That is, a noise reduction cavity 631 is provided on the main housing 621, the diameter of the noise reduction cavity 631 is larger than the diameter of the outlet 623, and the flow velocity of the water flow decreases when it enters the noise reduction cavity 631 from the outlet 623, reducing the water flow sound.

[0049] It should be noted that the outer peripheral surface of the noise reduction housing 630 and the inner wall of the noise reduction cavity 631 may also have inconsistent shapes. For example, the noise reduction housing 630 is in the shape of a cuboid, and a generally cylindrical noise reduction cavity 631 is arranged inside the noise reduction housing 630. In order to save consumables, generally, the shape of the outer peripheral surface of the noise reduction housing 630 is the same as that of the noise reduction cavity 631. The noise reduction cavity 631 can also be other shapes, such as a shape with a rectangular or other polygonal cross-section.

[0050] Furthermore, the pump housing structure of this embodiment further includes a floating seal mechanism, which is arranged in the noise reduction cavity 631; in the natural state, the floating seal mechanism cooperates with the inner wall of the noise reduction cavity 631 near the water inlet 622 to seal the water outlet 623; in the state of pumping water, the floating seal mechanism is separated from the inner wall of the noise reduction cavity 631 under the action of the water pressure to form a water flow gap.

[0051] Generally, the installation height of the water inlet 622 where the general drainage pump 600 is connected to the water tank is lower than that of the water outlet 623. When the drainage pump 600 drains the water in the water tank completely, the drainage pump 600 will continue to work for a period of time. At this time, since the specific gravity of water is much greater than that of air, the water in the water outlet pipe 700 (or the noise reduction housing 630) will fall back to the impeller of the drainage pump 600. When the falling water fills the impeller and the main housing 621 of the drainage pump 600, it is then discharged into the water outlet pipe 700 again. Repeating like this will generate a gurgling noise. In this embodiment, through the floating seal mechanism, during normal drainage, that is, in the state of pumping water, the floating seal mechanism is separated from the inner wall of the noise reduction cavity 631 under the action of the water pressure to form a water flow gap, meeting the normal drainage requirements; when the water in the water tank is emptied, that is, in the natural state, the floating seal mechanism is hardly affected by the water pressure, or the water pressure received is small. The floating seal mechanism cooperates with the inner wall of the noise reduction cavity 631 near the water inlet 622 to seal the water outlet 623, so that the water discharged into the noise reduction cavity 631 will not flow back into the main housing 621, avoiding the generation of repeated gurgling sounds.

[0052] In a specific implementation manner, the floating seal mechanism includes an elastic member and a seal body 702 connected to the elastic member. The elastic member has a tendency to make the seal body 702 abut against the inner wall of the noise reduction cavity 631 to seal the water outlet 623. Under the action of the water pressure, the seal body 702 can overcome the elastic force of the elastic member and separate from the inner wall of the noise reduction cavity 631.

[0053] Among them, the elastic member can be a spring 703. The first end of the spring 703 is connected to the inner wall of the noise reduction cavity 631 through a bracket 704, and the second end of the spring 703 is connected to the sealing body 702. Among them, the spring 703 can be compressed upward under the action of water pressure, so that the sealing body 702 is separated from the inner wall of the noise reduction cavity 631 to form a water flow gap; and when there is almost no water pressure, the spring 703 can rely on the elastic recovery ability of the spring 703 to elongate downward, so that the sealing body 702 abuts against the noise reduction cavity 631. The spring 703 can also be elongated upward under the action of water pressure, so that the sealing body 702 is separated from the inner wall of the noise reduction cavity 631 to form a water flow gap, and when there is almost no water pressure, the spring 703 can rely on the elastic recovery ability of the spring 703 to move downward to make the sealing body 702 abut against the noise reduction cavity 631.

[0054] As Figure 1 and Figure 2 shown, the noise reduction housing 630 of the pump housing structure in this embodiment includes a noise reduction main housing 632 and a connection housing 701. The noise reduction main housing 632 is detachably connected to the connection housing 701. The noise reduction main housing 632 is connected to the water outlet 623, and the connection housing 701 is used to connect to the water outlet pipe 700.

[0055] Among them, the bracket 704 for installing the spring 703 can be connected to the noise reduction main housing 632 or the connection housing 701. It should be noted that installing the bracket 704 on the connection housing 701 facilitates the installation of the floating seal mechanism and can reduce the influence of the floating seal mechanism on the water flow. Therefore, preferably, the spring 703 is installed on the connection housing 701 through the bracket 704. In the natural state, the sealing body 702 abuts against the end of the noise reduction cavity 631 away from the water outlet pipe 700 under the action of the force of the spring 703 or its own gravity.

[0056] It can be understood that the connection housing 701 can be integrally formed or fixedly connected with the water outlet pipe 700. In this way, after connecting the connection housing 701 and the noise reduction main housing 632, there is no need to connect the water outlet pipe 700 again, and the operation is convenient and fast. In order to prevent water leakage between the connection housing 701 and the noise reduction main housing 632, a sealing gasket 800 is provided between the connection housing 701 and the noise reduction main housing 632.

[0057] In a specific implementation manner of this embodiment, the noise reduction cavity 631 includes a through first cavity 6312 and a second cavity 6311. One end of the first cavity 6312 away from the second cavity 6311 is close to the water outlet 623 and is connected to the water outlet 623. In the direction from the water outlet 623 to the second cavity 6311, the first cavity 6312 gradually expands outward to form a flared opening. The second cavity 6311 is arranged in alignment with one end of the first cavity 6312 close to the second cavity 6311. The inner wall of the first cavity 6312 forms a sealing surface, and the sealing body 702 is in mating contact with the inner wall of the first cavity 6312 to seal the water outlet 623.

[0058] As Figure 8 shown, the first cavity 6312 is arranged below. The small-diameter end of the first cavity 6312 (i.e., Figure 1 the lower end shown) is connected and communicated with the water outlet 623 of the main housing 621. The first cavity 6312 is in the shape of an upward flared opening, and the large-diameter end of the first cavity 6312 has the same diameter as the second cavity 6311. The first cavity 6312 and the second cavity 6311 are mainly formed by the noise reduction main housing 632. The upper end of the second cavity 6311 is used to connect with the connecting housing 701. The connecting housing 701 gradually contracts inward in the direction away from the main housing 621. A reduced opening is formed in the connecting housing 701, and the contracting end of the connecting housing 701 is connected to the water outlet pipe 700.

[0059] It can be understood that the first cavity 6312 is similar to a cone with an open top, the second cavity 6311 is equivalent to a cylinder, and the part in the connecting housing 701 is also similar to a cone with an open top. This structural form facilitates the connection between the noise reduction housing 630 and the water outlet 623 of the main housing 621 and the connection between the water outlet pipe 700 and the connecting housing 701, and the water flow path changes gradually, avoiding the noise generated by the rapid change of the water flow speed.

[0060] Furthermore, the structure of the first cavity 6312 can be approximately conical, that is, the circumferential direction of the inner wall of the first cavity 6312 is arc-shaped. The sealing body 702 can be spherical, that is, a sphere. The inner wall of the first cavity 6312 forms an inclined surface that cooperates with the sealing body 702, providing guidance for the up and down floating of the sealing body 702 and enabling the sealing body 702 to better fit and seal with the inner wall of the first cavity 6312.

[0061] The sealing body 702 of the pump housing structure in this embodiment can be made of hollow rubber material. The connecting housing 701 is connected to the water outlet pipe 700. One end of the spring 703 is connected to the spherical sealing body 702, and the other end is connected to the connecting housing 701. An inclined surface that cooperates with the sealing body 702 is provided at the connection between the first noise reduction cavity 631 and the water outlet 623. Figure 8The state shown is that the spring 703 is in a normal extended state. At this time, the sealing body 702 cooperates with the inclined plane of the first noise reduction cavity 631 to achieve the effect of sealing water. When draining water, the water is pressurized by the drainage pump 600 and passes through the water outlet 623 of the main housing 621. At this time, the water has a certain pressure, and the upward pressure generated by the water will compress the spring 703. At this time, the spring 703 is in a compressed state, and the sealing body 702 disengages from the sealing surface, so that the water can enter the noise reduction cavity 631 and then be discharged into the user's household sewer or other set pipelines through the water outlet pipe 700. When draining water to the later stage, at this time, most of the water in the main housing 621 has basically rushed into the noise reduction cavity 631 through the water outlet 623. At this time, since the drainage pump 600 can no longer provide pressure for the remaining small amount of water and cannot compress the spring 703, the spring 703 returns to the normal extended state and continues to press the sealing body 702 on the sealing surface of the first cavity 6312, preventing the water in the noise reduction cavity 631 from falling back into the main housing 621. Therefore, gurgling sounds will not be generated during drainage, and the main noise problem during drainage is solved from the source.

[0062] Since the drainage pump 600 is a centrifugal drainage pump 600, a small amount of water cannot be discharged in the main housing 621 each time drainage is carried out, and there is still a small amount of water in the pump, and certain noise will still be generated. Since the water is basically emptied at this time, the pipelines in front of the drainage pump 600 are all filled with air. The noise generated at this time is extremely easy to be transmitted through the pipeline to the water outlet 200 and then to the tank body 100 of the sink, and then to the human ear, causing noise interference.

[0063] To solve this problem specifically, as Figure 5 shown, a noise reduction connecting pipe 300 is connected to the water inlet 622 of the main housing 621 of the pump housing structure in this embodiment. The noise reduction connecting pipe 300 is installed between the main housing 621 and the water outlet 200 of the sink.

[0064] It can be understood that the noise reduction connecting pipe 300 can further reduce noise and prevent noise from being transmitted into the sink. The material of the noise reduction connecting pipe 300 is preferably an elastic material, such as silicone rubber, silica gel, soft plastic (soft plastic refers to plastic with low hardness and capable of elastic deformation), etc., to prevent the vibration generated by the drainage pump 600 from being transmitted to the tank body 100 of the sink.

[0065] In this embodiment, the noise reduction connecting pipe 300 includes an inner pipe 301 forming a water flow channel, and a plurality of noise reduction diaphragms 302 are sequentially arranged at intervals along the extending direction of the inner wall of the inner pipe 301.

[0066] It is understandable that the inner tube 301 is fully enclosed to ensure the passage of water. A noise reduction diaphragm 302 is provided inside the inner tube 301 of the noise reduction connecting tube 300. The spaced noise reduction diaphragms 302 divide the cavity of the complete inner tube 301 into multiple independent cavities. When sound waves propagate in the inner tube 301, during the process of entering from one cavity into another, the sound waves will undergo a process of compression and then expansion. Whether it is the compression or the expansion process, the energy of the sound waves will be consumed. After multiple compressions and expansions, the energy of the sound waves will be reduced to a very low level, thereby reducing the propagation of noise.

[0067] Preferably, the noise reduction diaphragm 302 can vibrate under the action of the sound waves generated by the drainage pump 600, that is, the noise reduction diaphragm 302 is a thin film. When the sound waves are transmitted to the noise reduction diaphragm 302, it will cause the noise reduction diaphragm 302 to vibrate, further reducing the energy of the sound waves and reducing the noise.

[0068] Furthermore, the inner diameter of the noise reduction connecting tube 300 is larger than the inner diameter of the water inlet 622, that is, the inner diameter of the inner tube 301 is larger than the inner diameter of the water inlet 622. After the noise reduction connecting tube 300 is connected to the water inlet 622, the diameter of the noise reduction connecting tube 300 is larger than the diameter of the water inlet 622. When the noise generated in the main housing 621 enters the inner tube 301, it will expand once, reducing the energy of the sound waves and reducing a certain amount of noise.

[0069] During the transmission of sound waves, part of the sound waves will pass through the inner tube 301 and be transmitted to the outside. For better noise reduction, an outer tube 303 is sleeved outside the inner tube 301, and a plurality of noise reduction holes are provided on the outer tube 303. The noise reduction holes are fine holes provided on the outer tube 303. When the sound waves pass through the noise reduction holes, the wavelength is changed after diffraction through the noise reduction holes, and the sound waves diffracted by the plurality of noise reduction holes cancel each other out. At the same time, during the process of the sound waves passing through the noise reduction holes, there is intense friction with the hole walls, consuming the energy of the sound waves, thereby preventing noise from being conducted through the pipeline and further reducing the noise.

[0070] To prevent the water in the pipeline from not being drained completely, as Figure 3 and Figure 4 shown, at one end of the inner tube 301 close to the main housing 621, a step 304 that is recessed outward is provided at the bottom of the inner tube 301. The inner wall surface of the step 304 is on the outer side in the radial direction of the inner tube 301 relative to the inner wall surface of the main body of the inner tube 301. The water inlet 622 is connected to the step 304, so that the lowest point at the bottom of the inner tube 301 is higher than the inner wall surface of the water inlet 622, preventing water from remaining.

[0071] In summary, the pump housing structure of this embodiment can perform multi-dimensional noise reduction on the noise generated during the operation of the drainage pump 600 through the noise reduction cavity 631 formed by the noise reduction housing 630, the floating seal mechanism, and the noise reduction connecting tube 300, improving the noise environment brought by the drainage pump 600.

[0072] This embodiment also provides a drainage pump 600, which includes a pump main body 610 and the pump housing structure provided in this embodiment. The impeller of the pump main body 610 is installed in the main housing 621, and other parts of the pump main body 610, such as driving mechanisms like motors, can be set accordingly as required.

[0073] The drainage pump 600 in this embodiment has the same beneficial effects as the pump housing structure provided in this embodiment. For specific analysis, reference can be made to the description of the beneficial effects of the pump housing structure in this embodiment, which will not be elaborated here.

[0074] As Figures 5 to 8 shown, this embodiment also provides a sink, which includes a tank body 100 and the pump housing structure or the drainage pump 600 provided in this embodiment installed on the tank body 100. Among them, a drainer 200 is provided on the tank body 100, and the water inlet 622 is communicated with the drain port of the drainer 200. Specifically, the drainer 200 is connected to the tank body 100 and the noise reduction connecting pipe 300, and the other end of the noise reduction connecting pipe 300 is connected to the water inlet 622.

[0075] Furthermore, a mounting bracket 400 is provided on the tank body 100, and the pump housing structure is installed on the mounting bracket 400 through a transition plate 500, and the material of the transition plate 500 is an elastic material.

[0076] Specifically, as Figures 5 to 8 shown, the drainer 200 is connected to the bottom of the tank body 100 and is responsible for draining the water in the tank body 100 out of the tank body 100. A drain port is provided on the side of the drainer 200 and is connected to the water inlet 622 of the drainage pump 600 through the noise reduction connecting pipe 300, which is responsible for connecting the water discharged from the drainer 200 into the drainage pump 600. The rear end of the drainage pump 600 is connected to the water outlet pipe 700, and the water discharged from the drainage pump 600 is discharged into the user's household sewer or other pipeline paths through the water outlet pipe 700.

[0077] One side of the mounting bracket 400 is bonded or welded to the tank body 100. The specific connection method is determined according to the material of the mounting bracket 400. Welding is used for stainless steel material, and bonding is used for other materials. The mounting bracket 400 is fixedly connected to the transition plate 500, which can be specifically connected by screw fastening or integrally connected by secondary injection molding. At the same time, the drainage pump 600 is fixedly connected to the mounting bracket 400 through the transition plate 500. The transition plate 500 is made of elastic material, and specifically can be made of rubber, soft plastic (soft plastic refers to plastic with low hardness and capable of elastic deformation), silica gel and other materials. The drainage pump 600 belongs to a centrifugal drainage pump 600, which uses the rotation of the motor to drain water. Since the rotation of the motor in the main housing 621 will generate vibration, the traditional connection method is a rigid connection, and the vibration is directly transmitted to the connecting components and finally transmitted to the product surface, resulting in obvious vibration when touching the product, and at the same time, it will also affect some other connecting parts. Here, the transition plate 500 is made of elastic material to convert the vibration generated by the drainage pump 600 into elastic potential energy in the elastic material and then slowly release it through the recovery of the elastic material, thereby reducing the vibration of the whole machine.

[0078] In summary, the sink of this embodiment realizes noise reduction through roughly three parts. The first part is to use the transition plate 500 made of elastic soft material to connect the drainage pump 600 to reduce vibration. The second part is to set a floating sealing mechanism at the water outlet 623 and expand the pipeline to reduce the water flow velocity and noise. The third part is that the water inlet 622 adopts a multi-stage cavity-dividing noise reduction and vibration energy-consuming method to realize the drainage noise reduction function. Specifically, the sink of this embodiment uses the transition plate 500 made of elastic material to connect the drainage pump 600 and the tank body 100 to prevent the vibration of the drainage pump 600 from being transmitted to the tank body 100. A noise reduction cavity 631 is arranged outside the water outlet 623 to slow down the water flow velocity and achieve the effect of drainage noise reduction. For the period with the largest noise in the later stage of drainage, by using the cooperation setting of the noise reduction cavity 631 and the sealing body 702, it is avoided that the water in the pipeline returns to the main housing 621 and the water repeatedly rises and falls in the main housing 621 to generate noise. For the noise directly transmitted into the tank body 100 through the pipeline, a noise reduction connecting pipe 300 is arranged between the drainage pump 600 and the drainer 200 to reduce the noise transmitted in the pipeline. Thus, the purpose of overall noise reduction of the drainage pump 600 is achieved.

[0079] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pump housing structure, characterized in that, It includes a main housing (621) and a noise reduction housing (630). An inlet (622) and an outlet (623) are provided on the main housing (621). A noise reduction chamber (631) is provided on the noise reduction housing (630). The outlet (623) is communicated with the noise reduction chamber (631). The cross-sectional area of the noise reduction chamber (631) is larger than that of the outlet (623). The pump housing structure further includes a floating seal mechanism, and the floating seal mechanism is arranged in the noise reduction chamber (631). In the natural state, the floating seal mechanism cooperates with the inner wall of the noise reduction chamber (631) on the side close to the inlet (622) to seal the outlet (623); in the state of pumping water, the floating seal mechanism is separated from the inner wall of the noise reduction chamber (631) under the action of water pressure to form a water flow gap.

2. The pump housing structure according to claim 1, characterized in that, The cross-sections of the outlet (623) and the noise reduction chamber (631) are both circular, and the diameter of the noise reduction chamber (631) is larger than that of the outlet (623).

3. The pump housing structure according to claim 1, characterized in that, The floating seal mechanism includes an elastic member and a seal body (702) connected to the elastic member. The elastic member has a tendency to make the seal body (702) abut against the inner wall of the noise reduction chamber (631) to seal the outlet (623). Under the action of water pressure, the seal body (702) can overcome the elastic force of the elastic member and separate from the inner wall of the noise reduction chamber (631).

4. The pump housing structure according to claim 3, characterized in that, The elastic member is a spring (703). The first end of the spring (703) is connected to the inner wall of the noise reduction chamber (631) through a bracket (704), and the second end of the spring (703) is connected to the seal body (702).

5. The pump housing structure according to claim 4, characterized in that, The noise reduction housing (630) includes a noise reduction main housing (632) and a connecting housing (701). The noise reduction main housing (632) is detachably connected to the connecting housing (701). The noise reduction main housing (632) is connected to the outlet (623). The connecting housing (701) is used to connect to an outlet pipe (700), and the bracket (704) is connected to the connecting housing (701).

6. The pump housing structure according to any one of claims 3 - 5, characterized in that, The noise reduction chamber (631) includes a first chamber (6312) and a second chamber (6311) that are in communication. One end of the first chamber (6312) far from the second chamber (6311) is close to the outlet (623) and is connected to the outlet (623). In the direction from the outlet (623) to the second chamber (6311), the first chamber (6312) gradually expands outward to form a flared opening, and the second chamber (6311) is arranged in alignment with one end of the first chamber (6312) close to the second chamber (6311). The inner wall of the first chamber (6312) forms a sealing surface, and the seal body (702) cooperates with and abuts against the sealing surface to seal the outlet (623).

7. The pump housing structure according to claim 6, characterized in that, The seal body (702) is spherical, and the circumferential direction of the inner wall of the first chamber (6312) is arranged in an arc shape.

8. The pump housing structure according to claim 5, characterized in that, The connecting housing (701) gradually contracts inward in a direction away from the main housing (621), and a contraction end of the connecting housing (701) is fixedly connected to a water outlet pipe (700); and / or, A gasket (800) is provided between the connecting housing (701) and the noise reduction main housing (632).

9. The pump housing structure according to any one of claims 1 - 5, characterized in that, A noise reduction connecting pipe (300) is connected to the water inlet (622).

10. The pump housing structure according to claim 9, characterized in that, The noise reduction connecting pipe (300) includes an inner pipe (301) forming a water flow channel, and a plurality of noise reduction diaphragms (302) are sequentially arranged at intervals along the extending direction of the inner pipe (301) on the inner wall of the inner pipe (301).

11. The pump housing structure according to claim 10, characterized in that, The noise reduction diaphragm (302) can vibrate under the action of sound waves generated by the drainage pump (600).

12. The pump housing structure according to claim 10, characterized in that, An outer pipe (303) is sleeved outside the inner pipe (301), and a plurality of noise reduction holes are provided on the outer pipe (303).

13. The pump housing structure according to claim 9, characterized in that, The material of the noise reduction connecting pipe (300) is an elastic material; and / or, The inner diameter of the noise reduction connecting pipe (300) is larger than the inner diameter of the water inlet (622); and / or, A step (304) recessed outward is provided at the bottom of the inner wall of the noise reduction connecting pipe (300) near the water inlet (622), and the water inlet (622) is sleeved at the step (304).

14. A drainage pump, characterized in that, Including the pump housing structure according to any one of claims 1-13.

15. A water tank, characterized in that, Including a tank body (100) and the pump housing structure according to any one of claims 1-13 or the drainage pump (600) according to claim 14 mounted on the tank body (100); The tank body (100) is provided with a drainer (200), and the water inlet (622) is communicated with a drain outlet of the drainer (200).

16. The sink according to claim 15, characterized in that, An installation frame (400) is provided on the tank body (100), the pump housing structure is mounted on the installation frame (400) through a transition plate (500), and the material of the transition plate (500) is an elastic material.

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