Pump head assembly, diaphragm pump and water treatment equipment

Abstract

The utility model discloses a pump head assembly, diaphragm pump and water treatment equipment, and relates to the technical field of booster pump, the pump head assembly comprises a pump shell support, a pump head end cover and a first sealing ring, the pump head end cover is arranged on one side of the pump shell support, and a mounting cavity is defined by the pump head end cover and the pump shell support; the first sealing ring is arranged between the contact end faces of the pump shell support and the pump head end cover and surrounds the mounting cavity. According to the technical scheme, due to the fact that the first sealing ring is arranged between the pump head end cover and the pump shell support, outside water can be prevented from entering the installation cavity of the pump head assembly, the protection effect on moving parts in the installation cavity is achieved, the buffering and damping effects can be achieved, and therefore the noise reduction performance of the pump head assembly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of booster pumps, in particular to a pump head assembly, a diaphragm pump and water treatment equipment. Background Art

[0002] A diaphragm pump is a common booster pump, which is usually used in water treatment equipment such as water purifiers and water heaters. The pump head housing of an existing diaphragm pump is usually composed of multiple housing structures connected together, and liquid pressurization is achieved through moving parts arranged inside its cavity. However, there is usually an assembly gap between two adjacent housing structures, and external water can easily penetrate into the pump head housing through the assembly gap, thereby adversely affecting the moving parts therein. Utility Model Content

[0003] The main purpose of the utility model is to provide a pump head assembly, a diaphragm pump and a water treatment device, aiming to alleviate the adverse effects of external water penetrating into the cavity through the assembly gap of the pump head housing in the diaphragm pump, thereby causing the moving parts therein.

[0004] The intensity of the noise caused by tiny collisions between moving parts during the pressurization process of the diaphragm pump.

[0005] To achieve the above-mentioned purpose, the pump head assembly proposed in the utility model includes a pump casing bracket, a pump head end cover and a first sealing ring. The pump head end cover is arranged on one side of the pump casing bracket and defines an installation cavity with the pump casing bracket. The first sealing ring is arranged between the contact end surface of the pump casing bracket and the pump head end cover and is arranged around the installation cavity.

[0006] In one embodiment, a first sealing ring groove is formed on the contact end surface of the pump head end cover and / or the pump housing bracket, and the first sealing ring is arranged in the first sealing ring groove.

[0007] In one embodiment, the first sealing ring groove is formed on the pump head end cover.

[0008] In one embodiment, the pump head end cover and the pump housing bracket are further formed with a through hole penetrating the contact end surface;

[0009] The first sealing ring groove has an avoidance groove section arranged corresponding to the through hole, and the avoidance groove section is arranged around the through hole toward the installation cavity.

[0010] In one embodiment, the through holes and the avoidance groove sections correspond one to one to form a through hole avoidance group, and a plurality of through hole avoidance groups are arranged at intervals around the installation cavity.

[0011] In one embodiment, the pump head assembly further comprises:

[0012] A pump casing is installed on the other side of the pump casing support and defines a pump head cavity with the pump casing support;

[0013] The valve seat is accommodated in the pump head cavity and abuts against the pump housing. A second sealing ring groove is formed on the abutting end surface of the valve seat and / or the pump housing. The second sealing ring groove is arranged around the pump head cavity, and a second sealing ring is arranged in the second sealing ring groove.

[0014] In one embodiment, the second sealing ring groove is formed on the valve seat

[0015] The utility model also provides a diaphragm pump, which comprises a pump head assembly as described in any one of the above items.

[0016] In one embodiment, the diaphragm pump further comprises a brushless motor, and the pump head end cover of the pump head assembly is mounted on a motor housing of the brushless motor.

[0017] The utility model also provides a water treatment device, which comprises the diaphragm pump as described in any one of the above items.

[0018] The technical solution of the utility model is to arrange a first sealing ring between the contact end faces of the pump casing bracket and the pump head end cover. After the pump casing bracket and the pump head end cover are connected by the connecting structure, the first sealing ring can follow the assembly gap existing during the sealing period, thereby effectively blocking external water from entering the installation cavity, which is beneficial to reducing the humidity in the installation cavity and improving the service life of the moving parts arranged therein. Moreover, the presence of the first sealing ring changes the original rigid contact mode between the pump casing bracket and the pump head end cover, and can buffer the relative movement between the pump casing bracket and the pump head end cover through its own elastic deformation, that is, the pump casing bracket and the pump head end cover play a buffering and shock-absorbing role for the collision of the moving parts in the installation cavity, which can improve the noise reduction performance of the pump head assembly to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 A schematic structural diagram of an embodiment of a diaphragm pump provided by the utility model;

[0021] Figure 2 for Figure 1 Structural diagram of the middle section AA;

[0022] Figure 3 for Figure 2 A schematic diagram of the enlarged structure of the local B in the middle;

[0023] Figure 4 for Figure 1 Schematic diagram of the exploded structure of the diaphragm pump;

[0024] Figure 5 for Figure 4 Structural schematic diagram of the middle pump casing support, the first sealing ring and the pump head end cover;

[0025] Figure 6 for Figure 4 Schematic diagram of the structure of the middle valve seat and the second sealing ring.

[0026] Description of Figure Numbers:

[0027] 100. Diaphragm pump; 1. Pump head assembly; 1a. Through hole; 11. Pump housing bracket; 11a. Mounting cavity; 11b. Pump head cavity; 12. Pump head end cover; 121. First sealing ring groove; 1211. Avoidance groove section; 13. First sealing ring; 14. Pump housing; 15. Valve seat; 151. Second sealing ring groove; 152. Suction hole; 153. Discharge hole; 16. Second sealing ring; 17. Balance wheel seat; 18. Diaphragm; 2. Brushless motor; 21. Motor housing.

[0028] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0032] A diaphragm pump is a common booster pump, which is usually used in water treatment equipment such as water purifiers and water heaters. The pump head housing of an existing diaphragm pump is usually composed of multiple housing structures connected together, and liquid pressurization is achieved through moving parts arranged inside its cavity. However, there is usually an assembly gap between two adjacent housing structures, and external water can easily penetrate into the pump head housing through the assembly gap, thereby causing adverse effects on the moving parts therein. The adverse effects usually include rusting of the moving parts and contamination in the external water clogging the moving gap of the moving parts.

[0033] Analyzing the causes of the above problems, it can be seen that the above assembly gap can be closed by a flexible structure, thereby blocking the external water.

[0034] Moreover, the moving parts arranged inside the diaphragm pump are installed on multiple housing structures respectively, and the multiple moving parts are driven to move by the motor rotor. However, during the pressurization process of the diaphragm pump, tiny collisions will occur between the moving parts, resulting in the generation of noise.

[0035] Each moving part usually includes a diaphragm and a balance wheel seat, wherein the pump head end cover in the multiple housing structures is installed to the housing of the motor, the motor rotor is installed to the pump head end cover through a bearing, and the balance wheel seat is also installed on the pump head end cover. The rotation of the motor rotor drives the multiple balance wheels of the balance wheel seat to swing along the axial direction of the diaphragm pump. The pump housing bracket in the multiple housing structures is arranged on one side of the pump head end cover, and the diaphragm is arranged on the pump housing bracket and connected to the balance wheel, so that the diaphragm is driven to reciprocate through the swing of the balance wheel.

[0036] Based on this, analyzing the causes of the above problems, it can be seen that during the entire movement process, the pump head end cover and the pump casing bracket serve as the installation basis for the balance wheel seat and the diaphragm respectively. There is a rigid contact between the two, which cannot contribute to buffering the collision of various moving parts. It is possible to consider setting a buffer structure between the two.

[0037] In view of this, the utility model proposes a pump head assembly, a diaphragm pump and a water treatment device, which can at least alleviate the adverse effects of external water penetrating into the cavity through the assembly gap of the pump head housing in the diaphragm pump, thereby causing adverse effects on the moving parts therein.

[0038] in, Figure 1 A schematic structural diagram of an embodiment of a diaphragm pump provided by the utility model; Figure 2 for Figure 1 Structural diagram of the middle section AA; Figure 3 for Figure 2 A schematic diagram of the enlarged structure of the local B in the middle; Figure 4 for Figure 1 Schematic diagram of the exploded structure of the diaphragm pump; Figure 5 for Figure 4 Structural schematic diagram of the middle pump casing support, the first sealing ring and the pump head end cover; Figure 6 for Figure 4 Schematic diagram of the structure of the middle valve seat and the second sealing ring.

[0039] See also Figure 1 and Figure 2 In one embodiment of the utility model, the pump head assembly 1 includes a pump casing support 11, a pump head end cover 12 and a first sealing ring 13. The pump head end cover 12 is arranged on one side of the pump casing support 11 and defines an installation cavity 11a with the pump casing support 11. The first sealing ring 13 is arranged between the contact end surfaces of the pump casing support 11 and the pump head end cover 12 and is arranged around the installation cavity 11a.

[0040] Among them, the pump casing bracket 11 is mainly used for installing the pump casing 14, and the pump head end cover 12 is mainly used to connect the motor housing 21 of the diaphragm pump 100. The installation cavity 11a is defined by the pump casing bracket 11 and the pump head end cover 12. In the installation cavity 11a, moving parts such as the balance wheel seat 17 and the eccentric wheel are generally arranged.

[0041] Among them, the first sealing ring 13 can be made of a material with good elasticity such as silicone, rubber, etc., and is used to play a role of sealing and buffering. It is worth mentioning that since the pump casing bracket 11 and the pump head end cover 12 are usually made of thin-walled structures, the shape of the first sealing ring 13 is determined according to the shape of the installation cavity 11a defined by the pump casing bracket 11 and the pump head end cover 12. For example, when the cross-section of the installation cavity 11a is circular, the first sealing ring 13 can be set to a circular shape; when the cross-section of the installation cavity 11a is square, the first sealing ring 13 can be set to a square shape. Of course, the first sealing ring 13 can also be other shapes, which is not limited in this embodiment.

[0042] The technical solution of the present utility model is to set a first sealing ring 13 between the contact end faces of the pump casing support 11 and the pump head end cover 12. After the pump casing support 11 and the pump head end cover 12 are connected by the connecting structure, the first sealing ring 13 can follow the assembly gap existing during the sealing period, thereby effectively blocking external water from entering the installation cavity 11a, which is beneficial to reducing the humidity in the installation cavity 11a and improving the service life of the moving parts arranged therein. Moreover, the existence of the first sealing ring 13 changes the original rigid contact mode between the pump casing support 11 and the pump head end cover 12, and can buffer the relative movement between the pump casing support 11 and the pump head end cover 12 through its own elastic deformation, that is, the pump casing support 11 and the pump head end cover 12 play a buffering and shock-absorbing role for the collision of the moving parts in the installation cavity 11a, which can improve the noise reduction performance of the pump head assembly 1 to a certain extent.

[0043] See also Figure 4 and Figure 5 In some embodiments, a first sealing ring groove 121 is formed on the contact end surface of the pump head end cover 12 and / or the pump housing support 11 , and the first sealing ring 13 is disposed in the first sealing ring groove 121 .

[0044] Among them, there are three situations for the setting position of the first sealing ring groove 121. First, the first sealing ring groove 121 is only set on the pump casing bracket 11. Second, the first sealing ring groove 121 is only set on the pump head end cover 12. Third, the first sealing ring groove 121 is set on both the pump head end cover 12 and the pump casing bracket 11. The two sealing ring grooves are set in opposition, and the first sealing ring 13 is in the two first sealing ring grooves 121 at the same time; no matter where the first sealing ring groove 121 is set, it is necessary to ensure that the first sealing ring 13 can abut against the pump head end cover 12 and the pump casing bracket 11. Therefore, the depth of the first sealing ring groove 121 should be less than the thickness of the first sealing ring 13.

[0045] According to the above technical solution, the first sealing ring groove 121 is provided to limit the first sealing ring 13 therein. During the connection between the pump head end cover 12 and the pump casing bracket 11, the first sealing ring 13 will not deviate from the contact end surfaces of the two and cause connection failure. At the same time, when subjected to excessive connection pressure, the first sealing ring 13 can fill the first sealing ring groove 121 through its own elastic deformation and will not be damaged by overpressure.

[0046] In the above embodiment, there are three possible situations for the setting position of the first sealing ring groove 121. Considering that the installation order of the diaphragm pump 100 is generally to use the motor as the installation basis, first install the pump head end cover 12 to the motor housing 21, and then install the pump casing bracket 11 to the pump head end cover 12. Therefore, if the first sealing ring groove 121 is set on the pump casing bracket 11, the first sealing ring 13 may be detached from the first sealing ring groove 121 during the process of installing the pump casing bracket 11 to the pump head end cover 12, thereby causing installation difficulties. If the first sealing ring groove 121 is respectively set on the pump casing bracket 11 and the pump head end cover 12, it may cause difficulty in aligning the pump casing bracket 11 and the pump head end cover 12 during the installation process.

[0047] For this reason, please see Figure 5 In some embodiments, a first sealing ring groove 121 is formed on the pump head end cover 12 .

[0048] According to the above technical solution, the first sealing ring groove 121 is formed on the pump head end cover 12. During the installation of the pump casing bracket 11 to the pump head end cover 12, there is no need to seek to align with the first sealing ring groove 121. It is only necessary to complete the connection with the pump head end cover 12 to ensure accurate alignment. At the same time, it can also overcome the problem of difficulty in installation caused by the first sealing ring 13 falling off the pump casing bracket 11.

[0049] Please continue reading Figure 5 In another embodiment, a through hole 1a penetrating the contact end surface is further formed on the pump head end cover 12 and the pump housing bracket 11; the first sealing ring groove 121 has an avoidance groove section 1211 arranged corresponding to the through hole 1a, and the avoidance groove section 1211 is arranged around the through hole 1a toward the installation cavity 11a.

[0050] Among them, the function of the through hole 1a is to provide an avoidance for the connecting piece. Under the connection of the connecting piece, the pump head end cover 12 and the pump casing bracket 11 can be stably connected. The structural form of the connecting piece can be a connecting screw, and correspondingly, the through hole 1a can be set as a threaded hole, but is not limited to this; "the avoidance groove section 1211 is arranged toward the installation cavity 11a and bypasses the through hole 1a" means that the first sealing ring groove 121 includes a main body part except the avoidance groove section 1211, and the through hole 1a is formed on the extension path of the main body part, so it is necessary to set the avoidance groove section 1211 to bypass the through hole 1a.

[0051] It can be understood that the first sealing ring 13 is arranged in a conformal manner with the first sealing ring groove 121 , and it also has an avoidance ring section corresponding to the avoidance groove section 1211 .

[0052] According to the above technical solution, the through hole 1a can be used for the connecting member to pass through, so as to stably connect the pump head end cover 12 and the pump housing support 11, so that the first sealing ring 13 is stably pressed and held in the first sealing ring groove 121. Moreover, since the first sealing ring groove 121 makes way for the through hole 1a through the avoidance groove section 1211, the main wall thickness of the pump head end cover 12 and the pump housing support 11 can be set to be thinner (see Figure 5 , it is only necessary to increase the wall thickness at the corresponding position of the avoidance groove section 1211 to provide a molding basis), which can ensure sufficient space for the installation cavity 11a, and can provide a limit for the avoidance ring section of the first sealing ring 13 through the setting of the connecting piece, thereby preventing the first sealing ring 13 from escaping from the contact end surface between the pump head end cover 12 and the pump housing bracket 11, thereby improving the sealing reliability of the pump head assembly 1.

[0053] For further information, please refer to Figure 5 In some embodiments, the through holes 1a and the avoidance slot sections 1211 correspond one-to-one to form a through hole 1a avoidance group, and multiple groups of the through hole 1a avoidance groups are arranged at intervals around the installation cavity 11a.

[0054] Among them, there are many possibilities for the setting position of the through hole 1a avoidance group. For example, multiple through hole 1a avoidance groups are arranged at equal intervals, or two through hole 1a avoidance groups form a group and are arranged at equal intervals with other two through hole 1a avoidance groups. This embodiment is not limited to this.

[0055] According to the above technical solution, by setting up multiple groups of through holes 1a avoidance groups, the first sealing ring 13 can be compressed and limited from various positions around it, thereby ensuring that the first sealing ring 13 is evenly squeezed and ensuring the sealing effect of various positions of the first sealing ring 13.

[0056] Specifically, in some embodiments, the contact end surface of the pump housing bracket 11 is also formed with a first sealing protrusion aligned with the first sealing ring groove 121. The first sealing protrusion can be actively pressed into the first sealing ring groove 121 to make sealing contact with the first sealing ring 13 therein, thereby further improving the watertight sealing effect of the pump head assembly 1.

[0057] See also Figure 2 , Figure 4 and Figure 6 In some embodiments, the pump head assembly 1 also includes a pump casing 14 and a valve seat 15. The pump casing 14 is installed on the other side of the pump casing support 11 and defines a pump head cavity 11b with the pump casing support 11; the valve seat 15 is accommodated in the pump head cavity 11b and abuts against the pump casing 14. A second sealing ring groove 151 is formed on the abutting end surface of the valve seat 15 and / or the pump casing 14. The second sealing ring groove 151 is arranged around the pump head cavity 11b, and a second sealing ring 16 is arranged in the second sealing ring groove 151.

[0058] Among them, see Figure 2 The pump head end cover 12 and the pump housing 14 are respectively arranged on both sides of the pump housing support 11, and the installation cavity 11a and the pump head cavity 11b are defined between the pump housing support 11. A contact channel is generally formed on the pump housing support 11. In the pump head cavity 11b, a diaphragm 18 and a valve seat 15 are pressed and arranged between the pump housing 14 and the pump housing support 11. A balance wheel seat 17 is arranged in the installation cavity 11a. The balance wheel of the balance wheel seat 17 is connected to one side of the diaphragm 18 through the contact channel. The swing of the balance wheel seat 17 drives the diaphragm 18 to move relative to the valve seat 15. The pump head cavity 11b is subjected to a double motion, thereby unidirectionally sucking the low-pressure liquid in the pump head cavity 11b through the suction hole 152 of the valve seat 15 to the boosting cavity between the diaphragm 18 and the valve seat 15, and then the liquid therein is unidirectionally pressurized and discharged through the discharge hole 153 of the valve seat 15. The specific structure of the valve seat 15 is not described in detail in this embodiment. It is worth mentioning that if there is an assembly gap between the abutting end faces of the pump housing 14 and the valve seat 15, the high-pressure liquid in the boosting cavity may flow back to the pump head cavity 11b through the assembly gap, which will undoubtedly affect the boosting efficiency.

[0059] Among them, "a second sealing ring groove 151 is formed on the abutting end surface of the valve seat 15 and / or the pump housing 14" means that there are three situations for the setting position of the second sealing ring groove 151. First, the second sealing ring groove 151 is only set on the valve seat 15. Second, the second sealing ring groove 151 is only set on the pump housing 14. Third, the second sealing ring groove 151 is set on both the pump housing 14 and the valve seat 15, and the two second sealing ring grooves 151 are set in opposition. The second sealing ring 16 is in the two second sealing ring grooves 151 at the same time.

[0060] According to the above technical solution, by arranging a second sealing ring 16 between the pump housing 14 and the valve seat 15, the pump head chamber 11b and the boosting chamber can be effectively separated, and the high-pressure liquid in the boosting chamber can be prevented from flowing back into the pump head chamber 11b through the assembly gap between the pump housing 14 and the valve seat 15, thereby improving the suction and boosting efficiency of the diaphragm 18; not only that, due to the arrangement of the second sealing ring groove 151 between the valve seat 15 and the pump housing 14, an installation basis can be provided for the second sealing ring 16 to avoid the second sealing ring groove 151 from being crushed due to deviation, thereby improving the sealing effect and sealing reliability.

[0061] It is worth mentioning that the molding of the second sealing ring groove 151 requires sufficient molding foundation. Due to the complex structural molding of the pump housing 14, the abutting end surface of the pump housing 14 is difficult to provide sufficient molding foundation, which may cause the thickness of the second sealing ring 16 to fail to meet the sealing requirements. In view of this, please continue to refer to Figure 3 and Figure 6 In some embodiments, a second sealing ring groove 151 is formed on the valve seat 15 .

[0062] Among them, the valve seat 15 is a component built into the pump casing bracket 11, and its edge has more molded areas. The width of the second sealing ring groove 151 molded in this area can be set relatively wide. For example, in one setting scenario, the second sealing ring groove 151 can even be set adjacent to the pump head cavity 11b (in this case, if the second sealing ring groove 151 of the same specification is set on the abutting end face of the pump casing 14, the inner side wall of the second sealing ring groove 151 may be missing, causing the second sealing ring groove 151 to be connected to the pump head cavity 11b. At this time, the second sealing ring 16 cannot be limited toward the pump head cavity 11b and there is a risk of deviation), so that there is a larger installation space in the second sealing ring groove 151, thereby ensuring that the thickness of the second sealing ring 16 can meet the expected sealing requirements.

[0063] See also Figure 1 , Figure 2 and Figure 4 The utility model also includes a diaphragm pump 100, which includes a pump head assembly 1 as described above. The specific structure of the pump head assembly 1 refers to the above embodiments. Since the diaphragm pump 100 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by all the technical solutions of all the above embodiments, which will not be described one by one here. Among them, due to the above pump head assembly 1, the waterproof and moisture-proof performance of the diaphragm pump 100 can be improved, and the noise intensity generated during its operation can be reduced to a certain extent.

[0064] In the diaphragm pump 100, the moving parts in the pump head assembly 1 can be driven by a brushed motor. However, since the brushed motor needs to be commutated by a mechanical commutation structure, the mechanical commutation structure will increase the overall length of the brushed motor and will also generate greater noise during operation. In some embodiments, the diaphragm pump 100 also includes a brushless motor 2, and the pump head end cover 12 of the pump head assembly 1 is installed on the motor housing 21 of the brushless motor 2.

[0065] The brushless motor 2 is transmission-connected to the moving parts in the pump head assembly 1 through its rotor assembly, and the transmission connection method is not limited in this embodiment.

[0066] According to the above technical solution, the pump head assembly 1 can be driven by adopting a brushless motor 2 as a power source. Since the brushless motor 2 replaces the mechanical commutation structure with an electronic commutation structure, the tail length of the brushless motor 2 can be greatly reduced while meeting the output power requirements, thereby reducing the volume of the diaphragm pump 100 as a whole, that is, reducing the installation space occupied by the diaphragm pump 100 in the water treatment equipment.

[0067] Moreover, due to the change in commutation method, the service life of the brushless motor 2 is significantly improved compared to the brushed motor, and the working noise and heat generation of the diaphragm pump 100 can be greatly reduced. The reduction in heat generation has a positive effect on improving the working efficiency of the brushless motor 2.

[0068] The utility model also includes a water treatment device, which includes a diaphragm pump 100 as described above. The specific structure of the diaphragm pump 100 refers to the above embodiments. Since the water treatment device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by all the technical solutions of all the above embodiments, which will not be repeated here.

[0069] In the present invention, the specific type of water treatment equipment is not limited. For example, the water treatment equipment can be a water purifier, a water purifier, a filter, a coffee machine, etc. In a specific embodiment, the water treatment equipment includes a water purifier. The water purifier is generally used in home and commercial environments. The diaphragm pump 100 is arranged in the water purifier. On the one hand, the suction efficiency of the water purifier can be improved, so that the water purification speed is faster. On the other hand, due to the arrangement of the first sealing ring 13, external water can be prevented from entering the pump head assembly 1, thereby improving the service life of the diaphragm pump 100. On the other hand, the first sealing ring 13 can play a role of buffering and shock absorption to improve the noise reduction performance of the water purifier, thereby meeting the user's usage needs.

[0070] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pump head assembly, characterized in that: It includes a pump casing support, a pump head end cover and a first sealing ring. The pump head end cover is arranged on one side of the pump casing support and defines an installation cavity with the pump casing support. The first sealing ring is arranged between the contact end surface of the pump casing support and the pump head end cover and is arranged around the installation cavity.

2. The pump head assembly according to claim 1, characterized in that: A first sealing ring groove is formed on the contact end surface of the pump head end cover and / or the pump housing bracket, and the first sealing ring is arranged in the first sealing ring groove.

3. The pump head assembly according to claim 2, characterized in that The first sealing ring groove is formed on the pump head end cover.

4. The pump head assembly according to claim 2, characterized in that: The pump head end cover and the pump housing bracket are also formed with a through hole penetrating the contact end surface; The first sealing ring groove has an avoidance groove section arranged corresponding to the through hole, and the avoidance groove section is arranged around the through hole toward the installation cavity.

5. The pump head assembly according to claim 4, characterized in that: The through holes and the avoidance groove sections correspond one to one to form a through hole avoidance group, and a plurality of through hole avoidance groups are arranged at intervals around the installation cavity.

6. The pump head assembly according to claim 1, characterized in that: The pump head assembly also includes: A pump casing is installed on the other side of the pump casing support and defines a pump head cavity with the pump casing support; The valve seat is accommodated in the pump head cavity and abuts against the pump housing. A second sealing ring groove is formed on the abutting end surface of the valve seat and / or the pump housing. The second sealing ring groove is arranged around the pump head cavity, and a second sealing ring is arranged in the second sealing ring groove.

7. The pump head assembly according to claim 6, characterized in that The second sealing ring groove is formed on the valve seat.

8. A diaphragm pump, characterized in that: Comprising a pump head assembly as claimed in any one of claims 1 to 7.

9. The diaphragm pump according to claim 8, characterized in that The diaphragm pump also includes a brushless motor, and the pump head end cover of the pump head assembly is installed on the motor housing of the brushless motor.

10. A water treatment device, characterized in that: Comprising the diaphragm pump as claimed in claim 9.

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