A pressure relief pump head and a pressure relief pump having the same
By designing a pressure relief valve plate in the pressure relief pump head to open and close the pressure relief hole under high pressure, the problem of component wear in fluid pumps under high pressure is solved, the pressure of fluid pumps is stabilized and their service life is extended, and the fluid passage structure is optimized.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN PUMTEK ELECTRONICS TECH
- Filing Date
- 2025-09-09
- Publication Date
- 2026-08-04
AI Technical Summary
When the pipeline of an existing fluid pump becomes blocked, the pressure rises sharply, causing wear on components such as diaphragms and shortening its service life.
Design a pressure relief pump head, comprising a pump cover, a pressure relief valve seat, a flow-through valve seat, an inlet check valve, a flow-out check valve, a pressure relief valve plate, and an opening and closing elastic element. The pressure relief valve plate opens and closes the pressure relief hole under high pressure to relieve fluid pressure and stabilize the pressure.
It effectively reduces wear on components during fluid discharge, extends the service life of the pressure relief pump, and optimizes the fluid passage structure to reduce pump head thickness.
Smart Images
Figure CN224592324U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of fluid pumps, and in particular to a pressure relief pump head and a pressure relief pump having the same. Background Technology
[0002] Fluid pumps, as fluid control components, are capable of transporting gases or liquids. When liquids are used as the transport medium, they are core fluid control components in modern smart homes and small household appliances, and are widely used in end products such as coffee machines, water dispensers, water purifiers, and cleaning equipment.
[0003] In existing technology, fluid pumps typically consist of a pump head, a pump body, and a motor. The pump head has an inlet pipe and an outlet pipe for fluid to enter and exit. During operation, the diaphragm inside the pump body receives power from the motor and undergoes periodic volume changes to achieve water flow.
[0004] However, in actual use, when the pipeline of the terminal product becomes blocked, the water flow is obstructed, causing the pressure inside the pump to rise sharply to its maximum value. Excessive pressure will aggravate the wear of components such as the diaphragm, thus greatly shortening the service life of the fluid pump. Utility Model Content In order to extend the service life, the purpose of this application is to provide a pressure relief pump head and a pressure relief pump having the same.
[0005] Firstly, the pressure relief pump head provided in this application adopts the following technical solution: A pressure relief pump head includes a pump cover, a pressure relief valve seat, an overflow valve seat, an inlet check valve, an outlet check valve, a pressure relief valve plate, and an opening and closing elastic element. The inlet check valve and the outlet check valve are both installed on the overflow valve seat, the pressure relief valve seat is installed on the overflow valve seat, and the pump cover is installed on the pressure relief valve seat. The pump cover has a first inlet chamber, a first outlet chamber and a pressure relief chamber. The first inlet chamber and the first outlet chamber are isolated from each other. The first inlet chamber and the pressure relief chamber are interconnected. The first outlet chamber and the pressure relief chamber are unidirectionally connected. The pressure relief valve seat has a second inlet chamber and a second outlet chamber. The second inlet chamber is connected to the first inlet chamber, and the second outlet chamber is connected to the first outlet chamber. The second outlet chamber is provided with a pressure relief hole for communicating with the pressure relief chamber. The pressure relief valve plate includes a mounting part, an opening and closing part, and a pressure relief deformation part. The pressure relief deformation part has an overflow notch. The mounting part is clamped between the pump cover and the pressure relief valve seat. The opening and closing part opens and closes the pressure relief hole under pressure. The opening and closing elastic element is installed in the pressure relief chamber. The opening and closing elastic element provides the opening and closing part with the elastic force to seal the opening end face of the pressure relief hole.
[0006] By adopting the above technical solution, when the pressure relief pump head is in use, the fluid enters the pump sequentially through the first inlet chamber and the second inlet chamber, and is then driven by the pump to enter the second outlet chamber. When the fluid pressure in the second outlet chamber is too high, the pressure relief valve plate is pressed to open the pressure relief orifice. After some of the fluid in the second outlet chamber enters the pressure relief orifice, it flows back to the first inlet chamber through the flow-through notch of the pressure relief valve plate, thereby achieving pressure relief in the second outlet chamber.
[0007] The pressure relief valve plate is designed to maintain stable pressure in the second drainage chamber, reducing the occurrence of excessive pressure. This reduces pressure wear on the components in the fluid discharge path of the pressure relief pump head and the internal components of the pump using the pressure relief pump head, thereby extending their service life.
[0008] Optionally, the pressure relief deformation section includes multiple circumferentially spaced connectors, with a flow gap formed between two adjacent connectors.
[0009] By adopting the above technical solution, multiple flow gaps are formed between the various connectors, meaning there are multiple flow gaps. The presence of multiple flow gaps allows the fluid flow to be dispersed, reducing the possibility of abnormal pressure relief caused by an anomaly in a single flow gap.
[0010] Optionally, the connector is provided in a sheet-like form.
[0011] By adopting the above technical solution, the sheet-like connecting parts can increase their strength and limit the direction of deformation, thereby improving the stability of deformation and making the pressure relief more stable.
[0012] Optionally, the pressure relief valve seat has a deformation cavity for the pressure relief deformation section to move and deform, the deformation cavity being located on the open end face of the pressure relief hole facing the pressure relief cavity.
[0013] By adopting the above technical solution, the deformation cavity increases the effective movement space of the pressure relief deformation part, thereby enabling the pressure relief deformation part to deform more effectively and stably, so as to stabilize the opening and closing of the pressure relief hole.
[0014] Optionally, the pressure relief valve seat is provided with a deformation platform that protrudes into the second drainage chamber, and the deformation chamber is formed within the deformation platform.
[0015] By adopting the above technical solution, the deformation cavity is formed by the deformation platform, so a larger deformation cavity space can be obtained without increasing the thickness of the pressure relief valve seat.
[0016] Optionally, the pressure relief valve plate also includes a guide portion, which is located on the side of the opening and closing portion facing the pump cover. A guide slide is provided in the pressure relief chamber for cooperating with the guide portion, and the opening and closing elastic element is sleeved on the guide portion.
[0017] By adopting the above technical solution, the guide part and the guide slide table cooperate to restrict the movement direction of the opening and closing part. Especially when closing the pressure relief hole, the opening and closing part whose movement direction is restricted by the guide slide table can accurately cover the opening of the pressure relief hole, thereby improving the stability of the pressure relief valve plate in closing the pressure relief hole.
[0018] Optionally, the overflow valve seat has a third inlet chamber and a third outlet chamber, the second outlet chamber is connected to the third outlet chamber, and the overflow valve seat is provided with an inlet hole that is opened and closed unidirectionally by an inlet check valve and an outlet hole that is opened and closed unidirectionally by an outlet check valve. The inlet hole is unidirectionally connected to the third inlet chamber, and the outlet hole is unidirectionally connected to the third outlet chamber.
[0019] By adopting the above technical solution, the second drainage chamber and the third drainage chamber are connected to form a larger space for fluid discharge, thereby reducing the thickness required for the pressure relief valve seat and thus reducing the overall thickness of the pressure relief pump head.
[0020] Optionally, the third inlet chamber is arranged around the outer ring of the third outlet chamber; the pressure relief chamber is located in the middle of the pump cover, and the first inlet chamber and the first outlet chamber are both located at the edge of the pump cover; the second outlet chamber includes a pressure relief area and an outlet area, the outlet area is located on the side of a portion of the third inlet chamber close to the first outlet chamber, and the pressure relief valve seat is provided with an isolation plate for sealing and isolating the outlet area and the third inlet chamber.
[0021] By adopting the above technical solution, with the pressure relief chamber as the center, the first inlet chamber and the first outlet chamber are set at the edge of the pump cover to optimize the flow path at the pump cover and facilitate pressure relief. The third inlet chamber surrounding the outer ring of the third outlet chamber is a common structural arrangement used by those skilled in the art. In order to achieve an effective fluid passage, the outlet area and the third outlet chamber are isolated by a baffle plate, so that the fluid discharge path extends from the middle of the pump to the edge, thereby achieving effective fluid flow.
[0022] Secondly, the pressure relief pump provided in this application adopts the following technical solution: A pressure relief pump, comprising a pressure relief pump head as described in any of the above.
[0023] By adopting the above technical solution and optimizing the structure of the pressure relief pump head, the pressure relief pump can relieve pressure when the internal pressure is too high, thereby making the pressure inside the pressure relief pump more stable, reducing the wear of parts caused by excessive pressure, and thus effectively extending the service life of the pressure relief pump.
[0024] Optionally, the pressure relief pump also includes a motor that provides power and a pump body driven by the motor to transport fluid. The pump body includes a base, a diaphragm seat, an eccentric wheel, a rocker arm, and a diaphragm. The base is mounted on the motor, the diaphragm seat is mounted on the base and connected to the pressure relief pump head, the diaphragm is mounted on the diaphragm seat, the eccentric wheel is mounted on the output shaft of the motor, and the rocker arm connects the eccentric wheel and the diaphragm.
[0025] By adopting the above technical solution, the motor is energized to drive the eccentric wheel to rotate. The rotating eccentric wheel drives the tilted rocker arm to swing, so that the diaphragm undergoes periodic volume changes, thereby completing the pumping and output of fluid to complete the fluid transport in the pressure relief pump head.
[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. In use, the fluid enters the pump through the first and second inlet chambers sequentially, and is then driven into the second outlet chamber by the pump. When the fluid pressure in the second outlet chamber is too high, the pressure relief valve plate is pressurized, causing the opening and closing part to open the pressure relief hole. After some fluid in the second outlet chamber enters the pressure relief hole, it flows back to the first inlet chamber through the flow notch of the pressure relief valve plate, thereby relieving pressure in the second outlet chamber. The pressure relief valve plate is designed to maintain a stable pressure in the second outlet chamber, reducing the occurrence of excessive pressure. This reduces pressure wear on the components related to the fluid discharge path of the pressure relief pump head and the components inside the pump using the pressure relief pump head during the fluid discharge process, thereby extending their service life. 2. The deformation cavity increases the effective movement space of the pressure relief deformation part, thereby enabling the pressure relief deformation part to deform more effectively and stably, so as to stabilize the opening and closing of the pressure relief hole. The deformation cavity is formed by the deformation platform, so there is no need to increase the thickness of the pressure relief valve seat to obtain a larger deformation cavity space. The second drainage cavity and the third drainage cavity are connected to form a larger space for fluid discharge, thereby reducing the thickness required for the pressure relief valve seat and reducing the overall thickness of the pump head. 3. Centered on the pressure relief chamber, the first inlet chamber and the first outlet chamber are positioned at the edge of the pump cover to optimize fluid flow at the pump cover and facilitate pressure relief. The third inlet chamber surrounding the third outlet chamber is a common structural arrangement used by those skilled in the art. To achieve an effective fluid flow path, a partition plate separates the outlet area and the third outlet chamber, allowing the fluid discharge path to extend from the center of the pump towards the edge, thus achieving effective fluid flow. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a top view of an embodiment of the present application; Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure at point AA; Figure 4 This is a top view of the pressure relief pump head according to an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the pressure relief valve plate in an embodiment of this application.
[0028] In the diagram: A. Inlet flow path; B. Drainage flow path; C. Pressure relief flow path; 1. Pressure relief pump head; 11. Pump cover; 111. First inlet chamber; 112. First outlet chamber; 113. Pressure relief chamber; 114. Guide slide; 12. Pressure relief valve seat; 121. Second inlet chamber; 122. Second outlet chamber; 123. Pressure relief hole; 124. Deformation platform; 125. Deformation chamber; 126. Isolation plate; 13. Flow valve seat; 131. Third inlet chamber; 132. Three-stage flow chamber; 133, inlet hole; 134, outlet hole; 14, inlet check valve; 15, outlet check valve; 16, pressure relief valve plate; 161, mounting part; 162, opening and closing part; 163, pressure relief deformation part; 1631, connecting part; 1632, flow notch; 164, guide part; 17, opening and closing elastic element; 2, pump body; 21, base; 22, diaphragm seat; 23, eccentric wheel; 24, rocker arm; 25, diaphragm; 251, bell cup; 3, motor. Detailed Implementation
[0029] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail below.
[0030] This application discloses a pressure relief pump, mainly used for fluid transportation, where the fluid medium can be gas or liquid. For ease of description, water is used as an example in the embodiments, but the use of other liquids or gases is common knowledge well known to those skilled in the art and is also within the scope of protection of this application.
[0031] The core design feature of this application is the pressure relief pump head, which can be replaced in various conventional pumps in the field according to actual design needs, including but not limited to fluid pumps such as the fluid pump with publication number CN223203203U and the pump with publication number CN222254295U.
[0032] Reference Figure 1 A pressure relief pump includes a pressure relief pump head 1, a pump body 2, and a motor 3. When energized, the motor 3's output shaft rotates, thereby outputting power. The pump body 2 receives the driving force generated by the motor 3 for fluid pumping and discharging. The pressure relief pump head 1 provides a unidirectional flow path for fluid inflow and outflow, and relieves pressure when the fluid pressure within the pump body 2 is too high, thus ensuring the stable operation of the pressure relief pump.
[0033] Reference Figure 1 and Figure 3The pump body 2 includes a base 21, a diaphragm seat 22, an eccentric wheel 23, a rocker arm 24, and a diaphragm 25. The diaphragm 25 has multiple bell cups 251 distributed circumferentially at equal intervals. The base 21 is mounted on the motor 3, the diaphragm seat 22 is mounted on the base 21, the diaphragm 25 is mounted on the diaphragm seat 22, the eccentric wheel 23 is mounted on the output shaft of the motor 3, the lower end of the rocker arm 24 is obliquely mounted on the eccentric wheel 23, and the upper part of the rocker arm 24 is simultaneously connected to all the bell cups 251 of the diaphragm 25. The positional and connection relationships of the components of the pump body 2 are common knowledge well known to those skilled in the art and will not be described in detail here.
[0034] Reference Figure 3 and Figure 4 The pressure relief pump head 1 includes a pump cover 11, a pressure relief valve seat 12, a flow-through valve seat 13, an inlet check valve 14, a outlet check valve 15, a pressure relief valve plate 16, and an opening / closing elastic element 17. The flow-through valve seat 13 is mounted on a diaphragm seat 22, the pressure relief valve seat 12 is mounted on the flow-through valve seat 13, and the pump cover 11 is mounted on the pressure relief valve seat 12. The pressure relief valve plate 16 and the opening / closing elastic element 17 are mounted on the pressure relief valve seat 12, and they cooperate to relieve pressure when the water pressure inside the pump body 2 is too high. The inlet check valve 14 and the outlet check valve 15 are both mounted on the flow-through valve seat 13, and they cooperate to ensure that the fluid inside the pressure relief pump can flow in one direction only.
[0035] Reference Figure 3 and Figure 4 The pump cover 11, the pressure relief valve seat 12, and the overflow valve seat 13 cooperate to form an inlet flow path A (marked by a blue arrow), a drain flow path B (marked by a green arrow), and a pressure relief flow path C (marked by a pink arrow).
[0036] When motor 3 is powered on, the output shaft of motor 3 rotates to drive the eccentric wheel 23 to rotate, and the tilted rocker arm 24 drives each bell cup 251 to sequentially increase or decrease in volume. When the volume of bell cup 251 increases, bell cup 251 draws water from the water inlet flow path A of pressure relief pump head 1. When the volume of bell cup 251 decreases, bell cup 251 delivers water to the drainage flow path B of pressure relief pump head 1.
[0037] Reference Figure 3 and Figure 4 The pump cover 11 has a first inlet chamber 111, a first outlet chamber 112, and a pressure relief chamber 113. The pressure relief chamber 113 is located in the middle of the pump cover 11. The first inlet chamber 111 and the first outlet chamber 112 are located at two opposite edges of the pump cover 11, respectively. The first inlet chamber 111 and the first outlet chamber 112 are isolated from each other. The first inlet chamber 111 is connected to the pressure relief chamber 113, and the first outlet chamber 112 is unidirectionally connected to the pressure relief chamber 113.
[0038] The pressure relief valve seat 12 has a second inlet chamber 121 and a second outlet chamber 122. The second inlet chamber 121 is located at one edge of the pressure relief valve seat 12 and is adapted to the position of the first inlet chamber 111, and the second inlet chamber 121 communicates with the first inlet chamber 111. The second outlet chamber 122 includes a pressure relief area and a discharge area. The discharge area is located at the other edge of the pressure relief valve seat 12 and is adapted to the position of the first outlet chamber 112, and the discharge area of the second outlet chamber 122 communicates with the first outlet chamber 112.
[0039] The pressure relief zone is used for unidirectional communication with the pressure relief chamber 113. The pressure relief zone is located in the middle of the pressure relief valve seat 12 and its position is adapted to the pressure relief chamber 113. The pressure relief zone is provided with a pressure relief hole 123 that communicates with the pressure relief chamber 113. Specifically, a deformation platform 124 is provided in the middle of the pressure relief valve seat 12. The deformation platform 124 protrudes in a direction away from the pump cover 11, that is, it protrudes into the pressure relief zone of the second drain chamber 122. A concave deformation cavity 125 is formed on the side of the deformation platform 124 near the pump cover 11. The pressure relief hole 123 is formed on the convex end face of the deformation platform 124. The pressure relief hole 123 communicates with the pressure relief chamber 113 and the pressure relief zone of the second drain chamber 122 through the deformation cavity 125. The pressure relief hole 123, the deformation cavity 125, and the pressure relief chamber 113 form a pressure relief flow path C.
[0040] Reference Figure 4 and Figure 5 To ensure the stability of pressure relief, a guide slide 114 is provided in the pressure relief chamber 113 of the pump cover 11 to limit the pressure relief valve plate 16. The position of the guide slide 114 corresponds to the position of the deformation platform 124 so that the guide slide 114 and the deformation platform 124 can cooperate.
[0041] Accordingly, the pressure relief valve plate 16 includes a mounting portion 161, an opening / closing portion 162, a pressure relief deformation portion 163, and a guide portion 164. The mounting portion 161 is a hollow plate-shaped part, sandwiched between the pump cover 11 and the pressure relief valve seat 12. The opening / closing portion 162 is a circular plate-shaped part, large enough to completely cover the opening of the pressure relief hole 123. The opening / closing portion 162 can move within the deformation cavity 125 in a direction close to or away from the pressure relief hole 123 to open and close the pressure relief hole 123. The guide portion 164 is located on the side of the mounting portion 161 facing the pump cover 11, and is sleeved on the guide slide 114. The opening / closing elastic element 17 is a compression spring, sleeved on the guide portion 164. The guide portion 164, the guide slide 114, and the opening / closing elastic element 17 cooperate to ensure the stability of the moving direction of the mounting portion 161.
[0042] The pressure relief deformation section 163 includes a plurality of circumferentially spaced connectors 1631. The connectors 1631 are plate-shaped, and one end of each connector 1631 is fixedly connected to the mounting section 161, and the other end is fixedly connected to the mounting section 161. A flow-through notch 1632 is formed between two adjacent connectors 1631 to allow fluid from the pressure relief hole 123 to pass through.
[0043] When the fluid pressure in the second drain chamber 122 is too high, the mounting part 161 of the pressure relief valve plate 16 is pressed to overcome the elastic force of the opening and closing elastic element 17. The mounting part 161 moves away from the pressure relief hole 123 in the deformation chamber 125 so that the pressure relief hole 123 opens. At this time, some fluid in the second drain chamber 122 enters the pressure relief hole 123 and flows back to the first inlet chamber 111 through the flow notch 1632 of the pressure relief valve plate 16, thereby realizing the pressure relief of the second drain chamber 122.
[0044] Reference Figure 3 and Figure 4 The overflow valve seat 13 has a third inlet chamber 131, a third outlet chamber 132, an inlet hole 133, and an outlet hole 134. The third outlet chamber 132 is located in the middle of the overflow valve seat 13, and the third inlet chamber 131 is arranged around the outer ring of the third outlet chamber 132, with the third inlet chamber 131 and the third outlet chamber 132 being isolated from each other. The outlet area of the second inlet chamber 121 is located above a portion of the third inlet chamber 131, so the pressure relief valve seat 12 is provided with an isolation plate 126 on the side of the outlet area away from the pump cover 11, and the isolation plate 126 seals and isolates the outlet area and the third inlet chamber 131. The first inlet chamber 111, the second inlet chamber 121, and the third inlet chamber 131 form an inlet flow path A, and the first outlet chamber 112, the second outlet chamber 122, and the third outlet chamber 132 form an outlet flow path B.
[0045] An inlet orifice 133 is disposed in the third inlet chamber 131 to connect the third inlet chamber 131 and the bell cup 251 corresponding to the diaphragm 25. An inlet check valve 14 is installed in the third inlet chamber 131 of the flow valve seat 13 to restrict the fluid in the inlet orifice 133 to be delivered only to the bell cup 251. An outlet orifice 134 is disposed in the third outlet chamber 132 to connect the third outlet chamber 132 and the bell cup 251. An outlet check valve 15 is installed in the third outlet chamber 132 of the flow valve seat 13 to restrict the fluid in the bell cup 251 to be delivered only to the third outlet chamber 132.
[0046] The implementation principle of a pressure relief pump in this application embodiment is as follows: (1) When water enters: The output shaft of the motor 3 drives the eccentric wheel 23 to rotate, thereby driving the swing rod 24 to increase the volume of the bell cup 251 of the diaphragm 25. At this time, the fluid passes through the first inlet chamber 111, the second inlet chamber 121, the third inlet chamber 131 and the inlet hole 133 in sequence, and enters the bell cup 251 of the diaphragm 25 in one direction under the action of the inlet check valve 14. (2) When draining: the swing rod 24 drives the volume of the bell cup 251 to decrease. The fluid in the bell cup 251 passes through the drain hole 134 in one direction under the action of the drain one-way valve 15, and then is discharged through the third drain chamber 132, the second drain chamber 122 and the first drain chamber 112. (3) When the water pressure in the pump body 2 is too high: the mounting part 161 of the pressure relief valve plate 16 is pressed to overcome the elastic force of the opening and closing elastic element 17. The mounting part 161 moves away from the pressure relief hole 123 in the deformation cavity 125 so that the pressure relief hole 123 is opened. The fluid flows back to the first inlet cavity 111 through the deformation cavity 125 and the pressure relief cavity 113.
[0047] The embodiments described herein are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.
Claims
1. A pressure relief pump head, characterized in that, The pump includes a pump cover (11), a pressure relief valve seat (12), a flow-through valve seat (13), an inlet check valve (14), a outlet check valve (15), a pressure relief valve plate (16), and an opening and closing elastic element (17). The inlet check valve (14) and the outlet check valve (15) are both installed on the flow-through valve seat (13), the pressure relief valve seat (12) is installed on the flow-through valve seat (13), and the pump cover (11) is installed on the pressure relief valve seat (12). The pump cover (11) has a first inlet chamber (111), a first outlet chamber (112) and a pressure relief chamber (113). The first inlet chamber (111) and the first outlet chamber (112) are isolated from each other. The first inlet chamber (111) and the pressure relief chamber (113) are interconnected. The first outlet chamber (112) and the pressure relief chamber (113) are unidirectionally connected. The pressure relief valve seat (12) has a second inlet chamber (121) and a second outlet chamber (122). The second inlet chamber (121) is connected to the first inlet chamber (111), and the second outlet chamber (122) is connected to the first outlet chamber (112). The second outlet chamber (122) is provided with a pressure relief hole (123) for communicating with the pressure relief chamber (113). The pressure relief valve plate (16) includes a mounting part (161), an opening and closing part (162), and a pressure relief deformation part (163). The pressure relief deformation part (163) has an overflow notch (1632). The mounting part (161) is clamped between the pump cover (11) and the pressure relief valve seat (12). The opening and closing part (162) is pressed to open and close the pressure relief hole (123). The opening and closing elastic element (17) is installed in the pressure relief chamber (113). The opening and closing elastic element (17) provides the opening and closing part (162) with elastic force to seal the opening end face of the pressure relief hole (123).
2. The pressure relief pump head according to claim 1, characterized in that, The pressure relief deformation section (163) includes a plurality of circumferentially spaced connectors (1631), and a flow gap (1632) is formed between two adjacent connectors (1631).
3. A pressure relief pump head according to claim 2, characterized in that, The connector (1631) is in the form of a sheet.
4. A pressure relief pump head according to claim 1, characterized in that, The pressure relief valve seat (12) has a deformation cavity (125) for the pressure relief deformation part (163) to move and deform. The deformation cavity (125) is located on the open end face of the pressure relief hole (123) facing the pressure relief cavity (113).
5. A pressure relief pump head according to claim 4, characterized in that, The pressure relief valve seat (12) is provided with a deformation platform (124) protruding into the second drainage cavity (122), and the deformation cavity (125) is formed in the deformation platform (124).
6. A pressure relief pump head according to claim 1, characterized in that, The pressure relief valve plate (16) also includes a guide portion (164), which is disposed on the side of the opening and closing portion (162) facing the pump cover (11). The pressure relief chamber (113) is provided with a guide slide (114) for cooperating with the guide portion (164), and the opening and closing elastic element (17) is sleeved on the guide portion (164).
7. A pressure relief pump head according to claim 1, characterized in that, The overflow valve seat (13) has a third inlet chamber (131) and a third outlet chamber (132). The second outlet chamber (122) is connected to the third outlet chamber (132). The overflow valve seat (13) is provided with an inlet hole (133) that is opened and closed unidirectionally by the inlet check valve (14) and an outlet hole (134) that is opened and closed unidirectionally by the outlet check valve (15). The inlet hole (133) is connected unidirectionally to the third inlet chamber (131), and the outlet hole (134) is connected unidirectionally to the third outlet chamber (132).
8. A pressure relief pump head according to claim 7, characterized in that, The third inlet chamber (131) is arranged around the outer ring of the third outlet chamber (132); the pressure relief chamber (113) is located in the middle of the pump cover (11), and the first inlet chamber (111) and the first outlet chamber (112) are both located at the edge of the pump cover (11); the second outlet chamber (122) includes a pressure relief area and an outlet area, the outlet area is located on the side of a portion of the third inlet chamber (131) close to the first outlet chamber (112), and the pressure relief valve seat (12) is provided with an isolation plate (126) for sealing and isolating the outlet area and the third inlet chamber (131).
9. A pressure relief pump, characterized in that, Includes the pressure relief pump head (1) as described in any one of claims 1 to 8.
10. A pressure relief pump according to claim 9, characterized in that, The pressure relief pump also includes a motor (3) that provides power and a pump body (2) driven by the motor (3) to transport fluid. The pump body (2) includes a base (21), a diaphragm seat (22), an eccentric wheel (23), a rocker arm (24), and a diaphragm (25). The base (21) is mounted on the motor (3). The diaphragm seat (22) is mounted on the base (21) and connected to the pressure relief pump head (1). The diaphragm (25) is mounted on the diaphragm seat (22). The eccentric wheel (23) is mounted on the output shaft of the motor (3). The rocker arm (24) connects the eccentric wheel (23) and the diaphragm (25).