Low-damping pulsating electromagnetic pump and intelligent toilet

Abstract

The utility model discloses a low damping pulsation electromagnetic pump, including pump shell, pump core, solenoid and elastic reset piece, the solenoid is sleeved in the outside of pump shell, be equipped with the water passageway and be equipped with the water inlet and the water outlet of water passageway both ends in the pump shell, the pump core is under the action of the magnetic field of solenoid and the elastic reset piece and reciprocates in the water passageway, be equipped with the Tesla valve flow channel in the pump core, the both ends of Tesla valve flow channel have positive and negative direction mouth, the positive direction mouth is linked together with the water inlet, the negative direction mouth is linked together with the water outlet. The utility model discloses an electromagnetic pump, still guarantee electromagnetic pump to have the water pumping capacity and the effect of accelerating and pressurizing to water flow under the condition of not using check valve, because of not having check valve, the water pressure loss is smaller. In addition, the utility model discloses a kind of intelligent closestool using above-mentioned low damping pulsation electromagnetic pump.

Description

Technical Field

[0001] This application relates to the field of electromagnetic pump technology for smart toilets, and in particular to a low-damping pulsating electromagnetic pump and a smart toilet. Background Technology

[0002] Smart toilets achieve their cleaning function by spraying water onto the human body. The goal of manufacturers and market demand is to make users more comfortable by spraying water onto their bodies.

[0003] In the prior art, different types of water pumps are installed in the water circuit to pressurize the water flow, and the water flow is also pulsated according to the working type of the water pump. Electromagnetic pumps, as high-pressure pulse pumps, are also used in smart toilets. However, due to their operating principle, they typically have two sets of one-way valves inside. These two sets of one-way valves generate strong resistance to the water flow, resulting in large water pressure loss. Another example is the high-frequency pulse booster electromagnetic pump disclosed in patent announcement number CN209875407U, which includes a connector. The connector has a water passage chamber, and the water passage chamber has a sealing head connected to a spring. A movable iron core is located on the right side of the sealing head. The left part of the iron core is located in the water passage chamber, and the right part is located in the cavity of a cylindrical tube. A water flow head is located at the right end of the cylindrical tube, and the right end of the iron core is connected to the water flow head via a compression spring. A water flow hole is located inside the iron core. The sealing head can seal the left end of the water flow hole, and the right end of the water flow hole communicates with the cavity of the cylindrical tube. A coil is circumferentially sleeved on the cylindrical tube, and the coil is fixed in a cage. This involves reducing one check valve and relying solely on a single check valve in conjunction with the pump core's movement to control water flow. However, this causes the electromagnetic pump to lose its pumping capability, only able to intermittently cut off the normally flowing water. Furthermore, even after the coil is de-energized, water still needs to push open the sealing rubber head to allow water to pass through, resulting in significant water pressure loss. Therefore, the inlet pipe connected to the electromagnetic pump needs to be designed to be relatively thick to generate sufficient water pressure, which leads to a larger pipe, increasing material costs and occupying more space. Utility Model Content

[0004] In order to overcome the shortcomings of existing electromagnetic pumps that lose their pumping ability and cause significant water pressure loss when a check valve is installed, this application provides a low-damping pulsating electromagnetic pump and a smart toilet. Without using a check valve, the electromagnetic pump still has the ability to pump water and accelerate and pressurize the water flow. Since there is no check valve, the water pressure loss is small.

[0005] To achieve the above objectives, this application adopts the following technical solution: A low-damping pulsating electromagnetic pump includes a pump casing, a pump core, an electromagnetic coil, and an elastic reset component. The electromagnetic coil is sleeved on the outside of the pump casing. The pump casing has a water passage and an inlet and an outlet located at both ends of the water passage. The pump core reciprocates within the water passage under the action of the magnetic field generated by the electromagnetic coil and the elastic reset component. The pump core has a Tesla valve flow channel with a forward port and a reverse port at both ends. The forward port is connected to the inlet, and the reverse port is connected to the outlet.

[0006] Preferably, the pump core is composed of two half-cores spliced ​​together, the two half-cores are symmetrically distributed about the pump core axis, and each half-core has a flow channel half-groove on the splicing surface, and the two flow channel half-grooves are spliced ​​together to form the Tesla valve flow channel.

[0007] Preferably, the Tesla valve flow channel includes at least two flow channel units connected in series. Each flow channel unit includes a main flow section and a branch flow section. The branch flow section detours from a first position of the main flow section and merges at a second position of the main flow section. The second position is located on the side of the first position away from the forward inlet. The main flow sections of two adjacent flow channel units are connected to form a main flow channel, and the branch flow sections of two adjacent flow channel units are staggered on both sides of the main flow channel.

[0008] Preferably, the water passage is provided with an abutment portion located near the water inlet, and the elastic reset member is located between the pump core and the abutment portion and maintains a tendency to drive the pump core to move towards the water outlet.

[0009] Preferably, the water passage is further provided with a limiting member, which is used to limit the distance the pump core moves toward the outlet.

[0010] Preferably, the pump housing includes a main body and an outlet cover formed by separate processing. One end of the main body forms an installation port, and the other end is provided with the inlet. The pump core and the elastic reset member are assembled in the main body through the installation port. The inner wall of the main body is provided with a first limiting step. The limiting member is inserted into the installation port and pressed onto the first limiting step. One end of the outlet cover is sleeved on the outside of the end of the main body with the installation port, and the outlet is provided on the outlet cover.

[0011] Preferably, the pump core is provided with a guide sleeve at the end away from the forward port, the guide sleeve is connected to the reverse port, and a guide sleeve is also provided in the water passage. The limiting member is clamped between the guide sleeve and the first limiting step. The guide sleeve passes through the limiting member and is inserted into the guide sleeve and slides with the guide sleeve.

[0012] Preferably, the low-damping pulsating electromagnetic pump further includes a buffer pad, the inner wall of the water outlet cover is provided with a second limiting step, the outer periphery of the guide sleeve is provided with a mounting part, the buffer pad is clamped between the mounting part and the second limiting step, and the limiting member is clamped between the mounting part and the first limiting step.

[0013] Preferably, a buffer ring is provided between the end of the pump core facing the limiting member and the limiting member.

[0014] Preferably, the low-damping pulsating electromagnetic pump further includes a support with a cavity, the electromagnetic coil is fixed inside the cavity, and the pump casing passes through the support and the electromagnetic coil and is fixed on the support.

[0015] In addition, this utility model also provides a smart toilet, including the low-damping pulsating electromagnetic pump described in any of the preceding claims.

[0016] The beneficial effects of this utility model are: 1. The pump core of this utility model is equipped with a Tesla valve flow channel. The Tesla valve flow channel has a forward port and a reverse port at both ends. The forward port is connected to the inlet, and the reverse port is connected to the outlet. With this design, when the electromagnetic pump is in use, the water flow direction in its water passage is from the inlet to the outlet. Since the forward port is connected to the inlet and the reverse port is connected to the outlet, the Tesla valve flow channel can be in a low-resistance direction along the water flow velocity direction and a high-resistance direction in the opposite direction. With the reciprocating motion of the pump core, combined with the basic characteristics of the Tesla valve flow channel, the water flow has low resistance and smooth flow when it passes through the pump core in the forward direction (i.e., from the forward port to the reverse port); the water flow has high resistance when it passes through the pump core in the reverse direction (i.e., from the reverse port to the forward port). Since the absolute velocity direction of the water flow in this embodiment is always positive, from the inlet to the outlet, when the absolute velocity direction of the pump core is the same as that of the water flow (i.e., from the inlet to the outlet), setting the pump core velocity value to be greater than the water flow velocity value allows the water flow to pass through the pump core in the opposite direction. Because the resistance encountered when passing through the Tesla valve channel in the opposite direction is greater, the water flow will be pushed by the pump core towards the outlet, forming an acceleration and pressurization effect. When the absolute velocity direction of the pump core is opposite to that of the water flow (i.e., from the outlet to the inlet), the water flow can pass through the pump core in the positive direction, thereby reducing the damping effect on the water flow. In other words, by intermittently powering the electromagnetic coil to generate an intermittent magnetic field and cooperating with the elastic reset component to drive the pump core to reciprocate, the effect of intermittently accelerating and pressurizing the water flow can be achieved, thus realizing intermittent pumping (i.e., pulsating flow). Therefore, this invention ensures that the electromagnetic pump has the ability to pump water and accelerate and pressurize the water flow without using a check valve. Since there is no check valve, the water pressure loss is small. In addition, since the check valve and the spring that drives the check valve are eliminated, the structure of the electromagnetic pump can be made simpler.

[0017] 2. The pump core is composed of two half-cores spliced ​​together, symmetrically distributed about the pump core axis. Each half-core has a flow channel semi-groove on its splicing surface, and the two flow channel semi-grooves are spliced ​​together to form the Tesla valve flow channel. This design, because the Tesla valve flow channel is a complex three-dimensional spatial structure containing multiple continuous bends and rotations, would increase manufacturing difficulty and cost if the flow channel were directly machined on the pump core. This solution, by setting flow channel semi-grooves on the splicing surface of each half-core and splicing two flow channel semi-grooves to form the Tesla valve flow channel, reduces the machining difficulty of the flow channel semi-grooves, thereby reducing manufacturing costs.

[0018] 3. The Tesla valve flow channel includes at least two flow channel units connected in series. Each flow channel unit includes a main flow section and a branch flow section. The branch flow section detours from the first position of the main flow section and merges at the second position of the main flow section. The second position is located on the side of the first position away from the forward inlet. The main flow sections of two adjacent flow channel units are connected to form the main flow channel, and the branch flow sections of two adjacent flow channel units are staggered on both sides of the main flow channel. In a flow channel unit, when water flows from the reverse inlet to the forward inlet (i.e., from the second position to the first position), it simultaneously enters both the main flow section and the branch flow section. Because the branch flow section is circuitous, with a longer path and greater resistance, the fluid velocity decreases as it flows through it. Furthermore, when it returns to the first position of the main flow section, its momentum direction violently collides and interferes with the momentum direction of the high-speed fluid in the main flow section, generating huge eddies and energy dissipation, thus creating extremely high reverse flow resistance and producing a high-resistance reverse flow effect. Conversely, when water flows from the forward inlet to the reverse inlet, most of the water flows through the main flow section to the next flow channel unit, resulting in a low-resistance effect. By designing at least two flow channel units in series, the high-resistance effect when the water flows in the opposite direction to the pump core can be improved, thereby enhancing the acceleration and pressurization effect of the water flow. The staggered distribution ensures lateral force balance on the pump core, preventing unnecessary lateral vibration during high-speed reciprocating motion and improving the overall structural reliability and durability.

[0019] 4. The water passage is equipped with a contact part located near the inlet. An elastic reset element is positioned between the pump core and the contact part, maintaining a tendency to drive the pump core towards the outlet. With this design, after the electromagnetic coil is energized and generates a magnetic field, the pump core moves from the outlet towards the inlet under the influence of the magnetic field, overcoming the force of the elastic reset element. When the electromagnetic coil is de-energized, the pump core returns to its original position, moving from the inlet towards the outlet under the action of the elastic reset element. This achieves the reciprocating movement of the pump core within the water passage under the magnetic field generated by the electromagnetic coil and the action of the elastic reset element. This is achieved simply by switching the electromagnetic coil on and off, resulting in a simple control logic. Furthermore, after the electromagnetic coil is de-energized, by ensuring that the absolute velocity of the pump core driven by the elastic reset element is greater than the absolute velocity of the water flow, an acceleration and pressurization effect on the water flow can be created.

[0020] 5. A limiting component is also installed in the water passage to restrict the distance the pump core can move towards the outlet. This design, by limiting the movement of the pump core towards the outlet, prevents excessive movement of the pump core from causing excessive stretching of the elastic reset component, thus ensuring that the elastic reset component operates within a safe range and preventing fatigue failure.

[0021] 6. The pump casing comprises a main body and an outlet cover, both machined separately. One end of the main body forms an installation port, and the other end has a water inlet. The pump core and the elastic reset component are assembled into the main body through the installation port. The inner wall of the main body has a first limiting step. The limiting component is inserted through the installation port and pressed onto the first limiting step. One end of the outlet cover is fitted onto the outer side of the end of the main body with the installation port, and the water outlet is located on the outlet cover. With this design, during assembly, the pump core and the elastic reset component are first inserted into the main body through the installation port, then the limiting component is installed so that it abuts against the first limiting step, and finally the outlet cover is assembled, making assembly relatively simple. In addition, the limiting component is set independently relative to the pump casing, which can prevent the pump core from impacting the pump casing at high speed and causing damage to the pump casing. Furthermore, the limiting component can be independently disassembled and replaced if damaged.

[0022] 7. A guide sleeve is provided at the end of the pump core away from the forward inlet, and the guide sleeve is connected to the reverse inlet. A guide sleeve is also provided in the water passage. A limiting member is clamped between the guide sleeve and the first limiting step. The guide sleeve passes through the limiting member and is inserted into the guide sleeve, slidingly engaging with the guide sleeve. This design provides an ultra-long and precise guide for the reciprocating motion of the pump core through the cooperation of the guide sleeves, preventing jamming and uneven wear.

[0023] 8. The low-damping pulsating electromagnetic pump also includes a buffer gasket. The inner wall of the outlet cover is provided with a second limiting step, and the outer periphery of the guide sleeve is provided with a mounting part. The buffer gasket is clamped between the mounting part and the second limiting step, and the limiting member is clamped between the mounting part and the first limiting step. With this design, the limiting member can transfer the impact force from the pump core to the buffer gasket through the mounting part. The buffer gasket absorbs part of the impact kinetic energy of the pump core, which reduces the impact kinetic energy transferred to the outlet cover, thereby ensuring the reliability of the connection between the outlet cover and the main body. In addition, the assembly of the outlet cover and the main body can realize the assembly and fixation of the buffer gasket, the guide sleeve, and the limiting member, making the assembly simpler. Finally, the buffer gasket is tightly filled between the mounting part of the guide sleeve and the second limiting step of the outlet cover, effectively preventing water from leaking from this joint surface to the outside of the pump casing, thereby enhancing the sealing performance between the outlet cover and the main body.

[0024] 9. A buffer ring is provided between the end of the pump core facing the limiting component and the limiting component. This design can absorb part of the impact kinetic energy of the pump core through the deformation of the buffer ring, thereby slowing down the pump core and reducing the impact force on the limiting component. It also avoids the vibration and noise caused by the hard contact and impact between the pump core and the limiting component.

[0025] 10. The low-damping pulsating electromagnetic pump also includes a support frame with a cavity. The electromagnetic coil is fixed inside the cavity, and the pump casing passes through the support frame and the electromagnetic coil and is fixed to the support frame. The design of the support frame provides a foundation for the installation of the electromagnetic coil and the pump casing, and the fact that the pump casing passes through the electromagnetic coil ensures that the magnetic field energy is used to drive the pump core to the maximum extent, reducing magnetic leakage and energy loss, and improving the pump's efficiency and response speed. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the electromagnetic pump in Embodiment 1 of this utility model; Figure 2 This is an explosion diagram of the electromagnetic pump in Embodiment 1 of this utility model; Figure 3 This is a cross-sectional view of the electromagnetic pump in Embodiment 1 of this utility model; Figure 4 This is an exploded view of the pump core in Embodiment 1 of this utility model; Figure 5 This is a cross-sectional view of the pump core in Embodiment 1 of this utility model; Figure 6 This is a schematic diagram of the water flow when it passes in the forward direction relative to the pump core in Embodiment 1 of this utility model; Figure 7 This is a schematic diagram of the flow of water passing in the opposite direction to the pump core in Embodiment 1 of this utility model.

[0027] In the diagram: 100, pump casing; 110, water passage; 111, inlet; 112, outlet; 113, contact part; 114, large diameter section; 115, first small diameter section; 120, main body; 121, mounting port; 122, first limiting step; 130, outlet cover; 131, second limiting step; 200, pump core; 210, Tesla valve flow channel; 211, forward port; 212, reverse port; 213, flow channel Unit; 2131, Mainstream section; 2132, Branch flow section; 201, Half core; 202, Flow channel half groove; 203, Half sleeve; 220, Guide sleeve; 300, Electromagnetic coil; 400, Elastic reset component; 500, Limiting component; 600, Guide sleeve; 610, Mounting part; 700, Buffer pad; 800, Buffer ring; 900, Bracket; 910, Cavity; 911, First through hole; 912, Second through hole. Detailed Implementation

[0028] The present application will now be further described with reference to the accompanying drawings and specific embodiments.

[0029] Example 1: like Figures 1 to 7As shown, the low-damping pulsating electromagnetic pump of this embodiment includes a pump housing 100, a pump core 200, an electromagnetic coil 300, and an elastic reset member 400. The electromagnetic coil 300 is sleeved on the outside of the pump housing 100. The pump housing 100 is provided with a water passage 110 and an inlet 111 and an outlet 112 at both ends of the water passage 110. The pump core 200 moves back and forth in the water passage 110 under the action of the magnetic field generated by the electromagnetic coil 300 and the elastic reset member 400. The pump core 200 is provided with a Tesla valve flow channel 210. The two ends of the Tesla valve flow channel 210 have a forward port 211 and a reverse port 212. The forward port 211 is connected to the inlet 111, and the reverse port 212 is connected to the outlet 112. With this design, when the electromagnetic pump is in use, the water flow direction in its water passage 110 is from the inlet 111 to the outlet 112. Since the forward port 211 is connected to the inlet 111 and the reverse port 212 is connected to the outlet 112, the Tesla valve flow channel 210 can be in a low-resistance direction along the water flow velocity direction and a high-resistance direction in the opposite direction. With the reciprocating motion of the pump core 200, combined with the basic characteristics of the Tesla valve flow channel 210, the water flow has low resistance and smooth flow when it passes in the forward direction relative to the pump core 200 (i.e. from the forward port 211 to the reverse port 212); the water flow has high resistance when it passes in the reverse direction relative to the pump core 200 (i.e. from the reverse port 212 to the forward port 211). Since the absolute velocity direction of the water flow in this embodiment is always positive, flowing from the inlet 111 to the outlet 112, when the absolute velocity direction of the pump core 200 is consistent with the absolute velocity direction of the water flow, that is, when the absolute velocity direction of the pump core 200 is from the inlet 111 to the outlet 112, setting the velocity value of the pump core 200 to be greater than the velocity value of the water flow allows the water flow to pass in the opposite direction relative to the pump core 200. Since the resistance encountered when passing in the opposite direction through the Tesla valve flow channel 210 is greater, the water flow will be pushed out by the pump core 200 towards the outlet 112, forming an acceleration and pressurization effect. When the absolute velocity direction of the pump core 200 is opposite to the absolute velocity direction of the water flow, that is, when the absolute velocity direction of the pump core 200 is from the outlet 112 to the inlet 111, the water flow can pass in the positive direction relative to the pump core 200, thereby reducing the damping effect on the water flow. In other words, by intermittently powering the electromagnetic coil 300 to generate an intermittent magnetic field and cooperating with the elastic reset component 400 to drive the pump core 200 to reciprocate, the effect of intermittently accelerating and pressurizing the water flow can be achieved, thereby realizing intermittent water pumping (i.e., pulsating flow). Thus, in this embodiment, without using a check valve, the electromagnetic pump still ensures that it has the ability to pump water and accelerate and pressurize the water flow. Since there is no check valve, the water pressure loss is small. In addition, since the check valve and the spring that drives the check valve are eliminated, the structure of the electromagnetic pump can be made simpler.

[0030] Specifically, such as Figure 5As shown, the Tesla valve flow channel 210 in this embodiment includes at least two flow channel units 213 connected in series. Each flow channel unit 213 includes a main flow section 2131 and a branch flow section 2132. The branch flow section 2132 detours from a first position of the main flow section 2131 and merges at a second position of the main flow section 2131. The second position is located on the side away from the forward port 211 from the first position. The main flow section 2131 and the branch flow section 2132 are connected to form a roughly teardrop-shaped flow channel structure. The tip of the teardrop-shaped flow channel structure faces the reverse port 212. The main flow sections 2131 of two adjacent flow channel units 213 are connected to form a main flow channel. The branch flow sections 2132 of two adjacent flow channel units 213 are staggered on both sides of the main flow channel. In a flow channel unit 213, when water flows from the reverse inlet 212 to the forward inlet 211 (i.e., from the second position to the first position), the water will simultaneously enter the main flow section 2131 and the branch flow section 2132. Since the branch flow section 2132 is meandering, with a longer path and greater resistance, the fluid velocity flowing through it will slow down. When it returns to the first position of the main flow section 2131, its momentum direction will collide and interfere violently with the momentum direction of the high-speed fluid in the main flow section 2131, generating huge eddies and energy dissipation, thus forming extremely high reverse flow resistance to produce the effect of high resistance in reverse flow. When the water flows from the forward inlet 211 to the reverse inlet 212, most of the water flows through the main flow section 2131 to the next flow channel unit 213 to produce a low resistance effect. By designing at least two cascaded flow channel units 213, the high resistance effect when the water flows in the opposite direction to the pump core 200 can be improved, thereby enhancing the acceleration and pressurization effect of the water flow. The staggered distribution ensures the lateral force balance of the pump core 200, thereby avoiding unnecessary lateral vibration of the pump core 200 during high-speed reciprocating motion and improving the reliability and durability of the overall structure.

[0031] like Figure 4 As shown, to facilitate the processing and forming of the pump core 200, the pump core 200 in this embodiment is formed by splicing two half-cores 201. The two half-cores 201 are symmetrically distributed about the axis of the pump core 200. Each half-core 201 has a flow channel half-groove 202 on its splicing surface. After the two half-cores 201 are spliced, the two flow channel half-grooves 202 are spliced ​​to form the Tesla valve flow channel 210. Since the Tesla valve flow channel 210 is a complex three-dimensional spatial structure containing multiple continuous bends and rotations, directly processing the Tesla valve flow channel 210 on the pump core 200 would increase the manufacturing difficulty and cost. However, the present solution provides a flow channel half-groove 202 on the splicing surface of each half-core 201, and the method of splicing two flow channel half-grooves 202 to form the Tesla valve flow channel 210 can reduce the processing difficulty of the flow channel half-grooves 202, thereby reducing the manufacturing cost. In this embodiment, the half-core 201 is made of magnetic metal material, and the two half-cores 201 are spliced ​​together and welded and sealed to form the pump core 200.

[0032] In this embodiment, the water passage 110 is provided with an abutment portion 113 located near the water inlet 111. Specifically, the water passage 110 includes a large-diameter section 114 and a first small-diameter section 115 located at one end of the large-diameter section 114, so that a stepped surface is formed between the end of the large-diameter section 114 and the end of the first small-diameter section 115. The stepped surface forms the abutment portion 113. The elastic reset member 400 is a compression spring. The pump core 200 is provided with a positioning part at one end facing the water inlet 111. One end of the elastic reset member 400 is sleeved on the outside of the positioning part, and the other end abuts against the abutment portion 113, so that the elastic reset member 400 is located between the pump core 200 and the abutment portion 113 and maintains the tendency to drive the pump core 200 to move towards the water outlet 112. With this design, after the electromagnetic coil 300 is energized and generates a magnetic field, the pump core 200 moves from the outlet 112 towards the inlet 111 under the action of the magnetic field, overcoming the force of the elastic reset member 400. When the electromagnetic coil 300 is de-energized, the pump core 200 moves back to its original position from the inlet 111 towards the outlet 112 under the action of the elastic reset member 400. This achieves the reciprocating movement of the pump core 200 within the water passage 110 under the magnetic field generated by the electromagnetic coil 300 and the action of the elastic reset member 400. This can be achieved simply by turning the electromagnetic coil 300 on and off, resulting in a simple control logic. Furthermore, after the electromagnetic coil 300 is de-energized, by making the absolute speed of the pump core 200 driven by the elastic reset member 400 greater than the absolute speed of the water flow, an acceleration and pressurization effect on the water flow can be achieved.

[0033] In addition, a limiting member 500 is provided in the water passage 110 to limit the distance the pump core 200 can move toward the outlet 112. This design, by limiting the movement of the pump core 200 toward the outlet by the limiting member 500, prevents excessive movement of the pump core 200 that could cause the elastic reset member 400 to be overstretched, thus ensuring that the elastic reset member 400 operates within a safe range and preventing fatigue failure.

[0034] like Figure 6 and 7 As shown, the direction of water flow is defined as the positive direction, and the absolute velocity of the water flow is: V 水 The absolute velocity of pump core 200 is: V 芯 The relative velocity of the water flow with respect to the pump core 200 is: V 相对 .

[0035] When the electromagnetic coil 300 is energized, driving the pump core 200 to move towards the inlet 111, that is, when the pump core 200 retracts, V 芯 In the opposite direction, V 水 For the positive direction, with pump core 200 as the reference, the relative velocity V of the water flow to pump core 200 is... 相对 The positive direction, the state is as follows Figure 6As shown. When the water flows in the forward direction relative to the pump core 200, the water enters the Tesla valve flow channel 210 from the forward port 211, passes through the main flow section 2131, and then enters the main flow section 2131 of the next flow channel unit 213 in sequence, and so on, and the water flows out smoothly from the reverse port 212, producing a low damping effect.

[0036] When the electromagnetic coil 300 is de-energized, the elastic reset component 400 drives the pump core 200 to pop out towards the outlet 112, V 芯 As the positive direction, V 水 It is in the positive direction, and V 芯 >V 水 Then, taking pump core 200 as a reference, the relative velocity V of the water flow to pump core 200 is... 相对 For the opposite direction, the state is as follows Figure 7 As shown. When the water flows in the opposite direction to the pump core 200, it enters the Tesla valve flow channel 210 from the reverse port 212, and then enters the main flow section 2131 and the branch flow section 2132 respectively. The water flow in the branch flow section 2132 will collide with the water flow in the main flow section 2131 at the first position, thus hindering it. The slowed water flow merges into one and then enters the main flow section 2131 and the branch flow section 2132 again. The water flow in the branch flow section 2132 will collide with the water flow in the main flow section 2131 at the first position, thus hindering it again. This cycle repeats, creating a high damping effect on the water flow. However, due to the absolute velocity V of the water flow... 水 Always in the positive direction, the absolute velocity V of the pump core 200 芯 The absolute velocity V of the water flow 水 The directions are consistent, and V 芯 >V 水 This causes the water flow to be pushed out by the pump core 200, resulting in an accelerated and pressurized effect.

[0037] Therefore, it can be seen that by the reciprocating motion of the pump core 200, the water flow can be intermittently accelerated and pressurized, thereby realizing intermittent water pumping.

[0038] To facilitate the assembly of the electromagnetic pump, the pump casing 100 in this embodiment includes a hollow main body 120 and a hollow outlet cover 130, which are machined separately. One end of the main body 120 forms an installation port 121, and the other end is provided with an inlet 111. The inner wall of the main body 120 is provided with a first limiting step 122. A large-diameter section 114 and a first small-diameter section 115 are provided on the main body 120, and the installation port 121 is provided at the end of the large-diameter section 114 away from the first small-diameter section 115. The diameter of the installation port 121 is larger than the inner diameter of the large-diameter section 114, so that the installation port 121... A first limiting step 122 is formed between the pump core 200 and the large-diameter section 114. The pump core 200 and the elastic reset member 400 are assembled into the main body 120 through the mounting port 121. The limiting member 500 is a rigid gasket. The limiting member 500 is inserted into and pressed onto the first limiting step 122 through the mounting port 121. The first limiting step 122 can limit the assembly depth of the limiting member 500 to improve the assembly position for assembly workers. The limiting member 500 can be pressed onto the first limiting step 122 by bonding or by being pressed onto the first limiting step 122 by the water outlet cover 130. One end of the water outlet cover 130 is sleeved on the outside of the end of the main body 120 with the mounting port 121. The water outlet 112 is provided on the water outlet cover 130. The water outlet cover 130 communicates with the interior of the main body 120 to form the water passage 110. With this design, during assembly, the pump core 200 and the elastic reset component 400 are first inserted into the main body 120 through the mounting port 121, then the limiting component 500 is installed so that it abuts against the first limiting step 122, and finally the water outlet cover 130 is assembled, making the assembly relatively simple. In addition, the limiting component 500 is set independently relative to the pump housing 100, which can also prevent the pump core 200 from impacting the pump housing 100 at high speed and causing damage to the pump housing 100. Furthermore, the limiting component 500 can be independently disassembled and replaced if damaged.

[0039] Preferably, in this embodiment, a guide sleeve 220 is provided at the end of the pump core 200 away from the forward port 211. The guide sleeve 220 communicates with the reverse port 212. The guide sleeve 220 is composed of two half-sleeves 203 symmetrically distributed about the axis of the pump core 200, which are spliced ​​together. The two half-sleeves 203 are integrally formed with the two half-cores 201 respectively. A guide sleeve 600 is also provided in the water passage 110. A limiting member 500 is clamped between the guide sleeve 600 and the first limiting step 122. The guide sleeve 220 passes through the limiting member 500 and is inserted into the guide sleeve 600, slidingly engaging with the guide sleeve 600. This design provides an ultra-long and precise guide for the reciprocating motion of the pump core 200 through the cooperation of the guide sleeve 600 and the guide sleeve 220, preventing jamming and uneven wear. A sealing ring is provided between the guide sleeve 220 and the guide sleeve 600 to prevent leakage.

[0040] It is understood that in other embodiments of this utility model, the guide sleeve is an integral piece, which is fixed to the end of the pump core with a reverse port by welding after the two half-cores are welded and fixed.

[0041] Furthermore, the electromagnetic pump also includes a buffer pad 700, which is a soft pad. The inner wall of the water outlet cover 130 is provided with a second limiting step 131. That is, the water outlet cover 130 includes a first hollow section, a second hollow section, and a third hollow section whose inner diameter gradually decreases towards the water outlet 112. The end of the first hollow section connected to the second hollow section forms the second limiting step 131. The guide sleeve 600 is inserted into the second hollow section. The end of the third hollow section opposite to the second hollow section forms the water outlet 112. The end of the main body 120 with the mounting port 121 is inserted into the first hollow section. The outer periphery of the guide sleeve 600 is provided with an annular mounting part 610. The buffer pad 700 is clamped between the mounting part 610 and the second limiting step 131. The limiting member 500 is clamped between the mounting part 610 and the first limiting step 122. This design simplifies assembly by assembling the outlet cover 130 with the main body 120, allowing for the assembly and fixation of the buffer gasket 700, guide sleeve 600, and limiting member 500. Furthermore, the limiting member 500 transmits the impact force from the pump core 200 to the buffer gasket 700 via the mounting portion 610. The buffer gasket 700 absorbs some of the impact kinetic energy from the pump core 200, reducing the impact kinetic energy transmitted to the outlet cover 130 and ensuring reliable connection between the outlet cover 130 and the main body 120. Finally, the buffer gasket 700 is tightly packed between the mounting portion 610 of the guide sleeve 600 and the second limiting step 131 of the outlet cover 130, effectively preventing water leakage from this mating surface to the outside of the pump casing 100, thereby enhancing the sealing performance between the outlet cover 130 and the main body 120.

[0042] In addition, a buffer ring 800 is provided between the end of the pump core 200 facing the limiting member 500 and the limiting member 500. This design can absorb part of the impact kinetic energy of the pump core 200 through the deformation of the buffer ring 800, thereby slowing down the pump core 200 and reducing the impact force on the limiting member 500. It also avoids the vibration and noise caused by the hard contact between the pump core 200 and the limiting member 500.

[0043] Finally, to achieve the assembly and fixation of the water outlet cover 130 and the main body 120, the electromagnetic pump in this embodiment also includes a bracket 900 with a cavity 910. The electromagnetic coil 300 is fixed inside the cavity 910. The pump housing 100 passes through the bracket 900 and the electromagnetic coil 300 and is fixed on the bracket 900. That is, the opposite side walls of the bracket 900 are respectively provided with a first through hole 911 and a second through hole 912. The first through hole 911 and the second through hole 912 are coaxially arranged. The diameter of the hole 11 is larger than the outer diameter of the first small diameter section 115 and smaller than the outer diameter of the large diameter section 114. The diameter of the second through hole 912 is larger than the outer diameter of the large diameter section 114 and smaller than the outer diameter of the end of the main body 120 with the mounting port 121. The side wall of the bracket 900 with the second through hole 912 also has a threaded hole located around the second through hole 912. The water outlet cover 130 has a mounting ear. During assembly, the electromagnetic coil 300 is placed in the cavity 910 and its first through hole 911 and The second through hole 912 is coaxial. Then, the end of the main body 120 with the water inlet 111 is sequentially inserted through the second through hole 912 and the first through hole 911. Then, the elastic reset member 400, the pump core 200 with the buffer ring 800, the limiting member 500, and the sealing ring are installed into the main body 120. Then, the mounting part 610 of the guide sleeve 600 is pressed onto the limiting member 500, and the buffer pad 700 is sleeved on the outside of the guide sleeve 600. Finally, the water outlet cover 130 is sleeved on the end of the main body 120 with the mounting port 121, and the screw is inserted through the mounting ear and locked in the threaded hole. This achieves the fixation of the pump housing 100, the bracket 900, and the electromagnetic coil 300. The design of the bracket 900 provides a foundation for the installation of the electromagnetic coil 300 and the pump housing 100. The fact that the pump housing 100 passes through the electromagnetic coil 300 ensures that the magnetic field energy is used to drive the pump core 200 to the maximum extent, reducing magnetic leakage and energy loss, and improving the pump's efficiency and response speed.

[0044] It is understood that in other embodiments of this utility model, the elastic reset member is a tension spring. The elastic reset member is located between the limiting member and the end of the pump core facing the water outlet. When the electromagnetic coil is energized, the magnetic force on the pump core overcomes the force of the tension spring and drives the pump core to move towards the end facing the water inlet. When the electromagnetic coil is de-energized, the tension spring drives the pump core to move towards the end facing the water outlet and makes the speed of the pump core greater than the speed of the water flow.

[0045] Example 2: This embodiment also discloses a smart toilet, including the low-damping pulsating electromagnetic pump described in Embodiment 1.

[0046] In addition to the preferred embodiments described above, there are other embodiments of this utility model. Those skilled in the art can make various changes and modifications based on this utility model. As long as they do not depart from the spirit of this utility model, they should all fall within the scope defined in the claims of this utility model.

Claims

1. A low-damping pulsating electromagnetic pump, comprising a pump casing, a pump core, an electromagnetic coil, and an elastic reset component, wherein the electromagnetic coil is sleeved on the outside of the pump casing, the pump casing has a water passage and an inlet and an outlet located at both ends of the water passage, and the pump core reciprocates within the water passage under the action of the magnetic field generated by the electromagnetic coil and the elastic reset component, characterized in that, The pump core is equipped with a Tesla valve flow channel, and the two ends of the Tesla valve flow channel have a forward port and a reverse port. The forward port is connected to the water inlet, and the reverse port is connected to the water outlet.

2. The low-damping pulsating electromagnetic pump as described in claim 1, characterized in that, The pump core is composed of two half-cores spliced ​​together. The two half-cores are symmetrically distributed about the pump core axis. Each half-core has a flow channel half-groove on the splicing surface. The two flow channel half-grooves are spliced ​​together to form the Tesla valve flow channel.

3. The low-damping pulsating electromagnetic pump as described in claim 1, characterized in that, The Tesla valve flow channel includes at least two flow channel units connected in series. Each flow channel unit includes a main flow section and a branch flow section. The branch flow section detours from a first position of the main flow section and merges at a second position of the main flow section. The second position is located on the side of the first position away from the forward inlet. The main flow sections of two adjacent flow channel units are connected to form a main flow channel, and the branch flow sections of two adjacent flow channel units are staggered on both sides of the main flow channel.

4. The low-damping pulsating electromagnetic pump as described in claim 1, characterized in that, The water passage is provided with an abutment part located near the water inlet. The elastic reset member is located between the pump core and the abutment part and maintains the tendency to drive the pump core to move towards the water outlet.

5. A low-damping pulsating electromagnetic pump as described in claim 4, characterized in that, The water passage is also equipped with a limiting component, which is used to limit the distance the pump core moves toward the outlet.

6. The low-damping pulsating electromagnetic pump as described in claim 5, characterized in that, The pump casing includes a main body and an outlet cover, which are processed separately. One end of the main body forms an installation port, and the other end is provided with the inlet. The pump core and the elastic reset member are assembled in the main body through the installation port. The inner wall of the main body is provided with a first limiting step. The limiting member is inserted into the installation port and pressed onto the first limiting step. One end of the outlet cover is sleeved on the outside of the end of the main body with the installation port, and the outlet is provided on the outlet cover.

7. A low-damping pulsating electromagnetic pump as described in claim 6, characterized in that, The pump core is provided with a guide sleeve at the end away from the forward port. The guide sleeve is connected to the reverse port. A guide sleeve is also provided in the water passage. The limiting member is clamped between the guide sleeve and the first limiting step. The guide sleeve passes through the limiting member and is inserted into the guide sleeve and slides with the guide sleeve.

8. A low-damping pulsating electromagnetic pump as described in claim 7, characterized in that, The low-damping pulsating electromagnetic pump also includes a buffer pad, the inner wall of the water outlet cover is provided with a second limiting step, the outer periphery of the guide sleeve is provided with a mounting part, the buffer pad is clamped between the mounting part and the second limiting step, and the limiting member is clamped between the mounting part and the first limiting step.

9. A low-damping pulsating electromagnetic pump as described in claim 5, characterized in that, A buffer ring is provided between the end of the pump core facing the limiting member and the limiting member.

10. A low-damping pulsating electromagnetic pump as described in claim 1, characterized in that, The low-damping pulsating electromagnetic pump also includes a support with a cavity, the electromagnetic coil is fixed inside the cavity, and the pump casing passes through the support and the electromagnetic coil and is fixed on the support.

11. A smart toilet, characterized in that, The low-damping pulsating electromagnetic pump includes any one of claims 1 to 10.

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