A flat head fluid chamber three-chamber pressure relief reverse osmosis diaphragm pump

Abstract

The present invention discloses a flat-head fluid chamber three-chamber pressure relief reverse osmosis diaphragm pump, comprising a fluid chamber, a diaphragm chamber, a diaphragm body, an aluminum support frame and a motor housing; the diaphragm chamber cooperates with the fluid chamber to form a high-pressure chamber for connecting to the water outlet and a low-pressure chamber for connecting to the water inlet; the top surface of the fluid chamber is a circular flat top surface, the center of which is processed with a pressure regulating valve chamber, and the pressure regulating valve chamber, the diaphragm chamber, the diaphragm body and the motor housing have the same axis; a pressure regulating assembly is installed in the pressure regulating valve chamber. The bottom surface of the diaphragm chamber is formed with three suction check cavities, and the top ring center of the diaphragm chamber is formed with a discharge check cavity; a water suction channel is opened in the suction check cavity, and three groups of drainage channel groups for corresponding communication with the corresponding suction check cavities are formed in the discharge check cavity, and each drainage channel group is composed of a plurality of drainage channels. The present invention has low energy loss, is energy-saving and environmentally friendly, and the fluid chamber adopts a flat-head design, which can effectively prevent the pressure regulating assembly from being damaged.

Description

Technical Field

[0001] The present invention relates to a diaphragm pump technology for a water purifier, in particular to a flat-head fluid chamber three-cavity pressure relief reverse osmosis diaphragm pump. Background Art

[0002] At present, water purifiers are very popular both for home and commercial use, and consumers have increasingly higher requirements for the performance of water purifiers. The reverse osmosis diaphragm pump is one of the main components installed in the water purifier. It is used to pressurize low-pressure raw water to provide high-pressure water and prevent the high-pressure water from flowing back after pressurization. A pressure regulating assembly mounting cavity is formed on the top surface of the fluid chamber of a traditional reverse osmosis diaphragm pump at a position deviating from the center of the top surface, and a pressure regulating assembly for adjusting the water pressure of the diaphragm pump is installed in the pressure regulating assembly mounting cavity. After the pressure regulating assembly is installed in the fluid chamber of this eccentric structure, the pressure regulating assembly will protrude very high from the top surface of the fluid chamber, which increases the risk of the pressure regulating assembly being bumped. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a flat-head fluid chamber three-cavity pressure relief reverse osmosis diaphragm pump in response to the status quo of the above-mentioned prior art. The reverse osmosis diaphragm pump has low energy loss, is energy-saving and environmentally friendly, and can prevent damage to the pressure regulating components.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] A flat-head fluid chamber three-chamber pressure relief reverse osmosis diaphragm pump, comprising a fluid chamber, an aluminum support frame and a motor housing assembled in sequence from top to bottom; a diaphragm chamber and a diaphragm body are press-fitted in sequence between the fluid chamber and the aluminum support frame; the diaphragm chamber cooperates with the fluid chamber to form a high-pressure chamber and a low-pressure chamber that are independent of each other; the low-pressure chamber is connected to the water inlet of the fluid chamber, and the high-pressure chamber is connected to the water outlet of the fluid chamber; the top surface of the fluid chamber is a circular flat top surface, the center of which is processed with a pressure regulating valve chamber, and the pressure regulating valve chamber, the diaphragm chamber, the diaphragm body and the motor housing have the same axis; a pressure regulating assembly for controlling the water pressure is installed in the pressure regulating valve chamber, and the pressure regulating assembly includes a small top cover that is press-fitted in sequence on the pressure regulating valve chamber. The pressure-regulating spring, spring base and pressure-regulating valve in the valve cavity; the horizontal plane of the upper surface of the small top cover is slightly lower than the horizontal plane of the flat top surface of the fluid chamber, or the horizontal plane of the upper surface of the small top cover is flush with the horizontal plane of the flat top surface of the fluid chamber; the bottom surface of the diaphragm chamber is formed with three suction check cavities constituting a three-cavity structure diaphragm chamber, and the top ring center of the diaphragm chamber is formed with a discharge check cavity surrounded by a circular upper convex edge; a water suction channel for connecting the suction check cavity and the low-pressure cavity is opened in the suction check cavity, and three groups of drainage channel groups for corresponding communication with the corresponding suction check cavity are formed in the discharge check cavity, and each group of drainage channel groups is composed of multiple drainage channels.

[0006] To optimize the above technical solutions, specific measures taken also include:

[0007] The fluid chamber is formed with a convex ring for sealing and press-fitting with the upper convex edge of the diaphragm chamber, and an O-ring is pressed between the convex ring and the upper convex edge for sealing; the high-pressure chamber is composed of the space surrounded by the upper convex edge and the convex ring.

[0008] The above-mentioned suction check chamber is provided with a suction check valve for preventing the sucked water from returning to the low-pressure chamber. The suction check valve includes a suction valve plate for sealing with the water suction channel and a suction valve stem connected to the center of the suction valve plate. A mounting hole for inserting and assembling the suction valve stem is formed in the center of the suction check chamber.

[0009] The above-mentioned discharge check chamber is provided with a discharge check valve for preventing the discharged water from returning to the suction check chamber. The discharge check valve includes a discharge valve plate for sealing with the drainage channel and a discharge valve stem connected to the center position of the discharge valve plate. An assembly hole for inserting and assembling the discharge valve stem is formed in the center of the discharge check chamber.

[0010] Three grooves are formed in the above-mentioned discharge check cavity for dividing the three groups of drainage channels, and a dividing strip is formed on the bottom surface of the discharge valve plate for sealing and plugging with the grooves.

[0011] Three independent sealing areas are formed on the above-mentioned diaphragm body, and the three sealing areas correspond to the three suction check cavities one by one to form three independent pump chambers; an annular groove for installing the piston plate is formed in the sealing area, and the piston plate is formed with a plug-in convex ring for being inserted into the groove.

[0012] The above-mentioned motor housing consists of a cylindrical casing, a front end cover and a rear end cover; the front end cover is fixedly installed on the front port of the casing, and the rear end cover is fixedly installed on the rear end of the casing; two carbon brush sliding cavities for slidingly installing carbon brushes are formed on the rear end cover, and the two carbon brush sliding cavities are 180 degrees apart in the circumferential direction. Each carbon brush sliding cavity is equipped with a carbon brush clip for clamping the carbon brush, and the rear end cover is provided with a lead notch for leading out the power cord, and a lead protection cover is clamped in the lead notch.

[0013] The above-mentioned aluminum support frame is fixedly connected to the front end cover of the motor housing, and a piston frame assembly cavity is formed between the aluminum support frame and the front end cover. The piston frame assembly cavity is provided with a piston frame that pushes the piston piece fixed on the diaphragm body to perform track motion by swinging. The piston frame is formed with a convex body at the position corresponding to each piston piece for top contact with the piston piece.

[0014] A positioning cavity is formed on the flat top surface of the above-mentioned fluid chamber for positioning and cooperating with the small top cover. The positioning cavity is formed with four threaded holes with a medium arc. Four countersunk holes for screws are formed on the top surface of the small top cover. The bottom surface of the small top cover is formed with an annular positioning cavity for cooperating with the upper end positioning sleeve of the pressure-adjusting spring.

[0015] A top cover sealing ring is press-fitted on the small top cover for sealing, and a triangular sealing ring is press-fitted between the fluid chamber and the aluminum support frame.

[0016] Compared with the prior art, the present invention forms the top surface of the fluid chamber into a circular flat top surface, and forms a pressure regulating valve cavity in the center of the flat top surface. A pressure regulating assembly for controlling the water pressure is installed in the pressure regulating valve cavity. After the pressure regulating assembly is installed, the horizontal plane of the upper surface of the small top cover in the pressure regulating assembly is slightly lower than the horizontal plane of the flat top surface of the fluid chamber, or the horizontal plane of the upper surface of the small top cover is flush with the horizontal plane of the flat top surface of the fluid chamber. The top surface of the fluid chamber of the present invention adopts a flat top structure, and the pressure regulating assembly is completely in the pressure regulating valve cavity of the fluid chamber. Therefore, this fluid chamber can not only prevent the pressure regulating assembly from being damaged, but also make the appearance of the diaphragm pump neater. The pressure regulating valve cavity, diaphragm chamber, diaphragm body and motor housing are coaxially arranged, which makes the assembly structure of each component simpler and the molding process of the pressure regulating valve cavity on the fluid chamber easier. The bottom surface of the diaphragm chamber of the present invention is formed with three suction check cavities, forming a diaphragm chamber with a three-cavity structure. The diaphragm chamber with a three-cavity structure can reduce the loss of each cycle movement of the motor, thereby being more energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional structural diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the decomposition structure of the present invention;

[0019] Figure 3 Schematic diagram of the assembly structure of the fluid chamber and the diaphragm chamber of the present invention;

[0020] Figure 4 is a top view of the fluid chamber of the present invention;

[0021] Figure 5 yes Figure 4 Left view of;

[0022] Figure 6 is a top view of the diaphragm chamber of the present invention;

[0023] Figure 7 yes Figure 6 Left view of;

[0024] Figure 8 is a top view of the diaphragm body of the present invention;

[0025] Figure 9 yes Figure 8 Left view of;

[0026] Figure 10 is a top view of the rear end cover of the present invention;

[0027] Figure 11 yes Figure 10 Left view of;

[0028] Figure 12 It is a top view of the small top cover of the present invention;

[0029] Figure 13 yes Figure 12 Left view of;

[0030] Figure 14 It is a structural schematic diagram of the discharge check valve of the present invention;

[0031] Figure 15 It is a structural schematic diagram of the suction check valve of the present invention. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

[0033] Figures 1 to 15 It is a structural diagram of the present invention.

[0034] The accompanying drawings are marked as follows: O-ring F, piston frame assembly chamber H, water suction channel K1, drainage channel K2, triangular sealing ring M, low-pressure chamber Q1, high-pressure chamber Q2, pump chamber S, fluid chamber 1, water inlet 1a, water outlet 1b, pressure regulating valve chamber 1c, positioning cavity 1d, threaded hole 1e, convex ring 11, aluminum support frame 2, diaphragm chamber 3, mounting hole 3a, assembly hole 3b, groove 3c, upper convex edge 31, discharge check chamber 32, diaphragm body 4, sealing area 41, slot 42, pressure regulating valve group 5, small top cover 51, countersunk hole 511, annular positioning cavity 512, spring base 52, pressure regulating valve 53, top cover sealing ring 54, suction check valve 61, suction valve plate 611, suction valve stem 612, discharge check valve 62, discharge valve plate 621, discharge valve stem 622, dividing strip 623, piston plate 7, plug-in convex ring 71, piston frame 8, convex body 81, motor housing 9, casing 91, front cover 92, rear cover 93, carbon brush sliding cavity 931, lead notch 932, carbon brush clip 94, outlet wire protection cover 95.

[0035] like Figures 1 to 15As shown, the present invention discloses a flat head fluid chamber three-chamber pressure relief reverse osmosis diaphragm pump, which includes a fluid chamber 1, an aluminum support frame 2 and a motor housing 9 from top to bottom. The fluid chamber 1, the aluminum support frame 2 and the motor housing 9 are fastened together by bolts. A diaphragm chamber 3 and a diaphragm body 4 are sealed and press-fitted between the fluid chamber 1 and the aluminum support frame 2. Figure 3 It can be clearly seen that the diaphragm chamber 3 and the fluid chamber 1 cooperate to form two independent chambers: a centrally located high-pressure chamber Q2 and a surrounding low-pressure chamber Q1. Fluid chamber 1 is formed with a water inlet 1a and a water outlet 1b circumferentially spaced 180 degrees apart. The high-pressure chamber Q2 communicates with the water outlet 1b, while the low-pressure chamber Q1 communicates with the water inlet 1a.

[0036] The key points of the present invention are as follows: the top surface of the fluid chamber 1 is machined into a circular flat top surface, the center of which is machined with a downwardly extending pressure regulating valve cavity 1c, and the pressure regulating valve cavity 1c, the diaphragm chamber 3, the diaphragm body 4 and the motor housing 9 have the same axis. A pressure regulating assembly 5 is installed in the pressure regulating valve cavity, and a drainage channel for connecting the high-pressure chamber Q2 and the water outlet 1b is formed in the fluid chamber 1. The pressure regulating assembly 5 adjusts the drainage pressure of the diaphragm pump by controlling the throat opening of the discharge channel. The pressure regulating assembly 5 of the present invention includes a small top cover 51, a pressure regulating spring (not shown in the figure), a spring base 52 and a pressure regulating valve 53. The pressure regulating spring, the spring base 52 and the pressure regulating valve 53 are press-fitted into the pressure regulating valve cavity in sequence through the small top cover 51. In the present invention, after the pressure regulating assembly 5 is installed, the horizontal plane of the upper surface of the small top cover 51 is aligned with the horizontal plane of the flat top surface of the fluid chamber 1, or the horizontal plane of the upper surface of the small top cover 51 is slightly lower than the horizontal plane of the flat top surface of the fluid chamber 1. In order to further facilitate the installation of the pressure regulating assembly 5, a positioning cavity 1d is machined on the flat top surface of the fluid chamber 1 for positioning with the small top cover 51. The positioning cavity 1d is formed by expanding the diameter of the upper end portion of the pressure regulating valve cavity 1c. Figure 4 As shown, the positioning cavity 1d is formed with a medium arc and four threaded holes 1e, which are used to tighten with screws. Figure 12 It can be seen that there are four countersunk holes 511 formed on the top surface of the small top cover 51. Screws can pass through the countersunk holes 511 and screw together with the threaded holes 1e to fasten the small top cover 51 in the positioning cavity 1d. Figure 4 As can be seen from the figure, the bottom surface of the small top cover 51 is formed with an annular positioning cavity 512 for cooperating with the upper end positioning sleeve of the pressure regulating spring. The bottom surface of the diaphragm chamber 3 of the present invention is formed with three suction check cavities constituting the three-cavity structure diaphragm chamber. Figure 6 and Figure 7It can be seen that the suction check chamber bulges upward in an arc shape, and the three suction check chambers are distributed in an isosceles triangle. A discharge check chamber 32 is formed in the center of the top ring of the diaphragm chamber 3, and the discharge check chamber 32 is composed of the space surrounded by the circular upper convex edge 31 on the diaphragm chamber 3. Each suction check chamber is provided with a plurality of water suction channels K1, and the water suction channels K1 are used to connect the suction check chamber and the low-pressure chamber Q1, so that the raw water entering the low-pressure chamber Q1 from the water inlet 1a can be sucked into the suction check chamber. Three drainage channel groups are provided in the discharge check chamber 32, and each drainage channel group is composed of a plurality of drainage channels K2. The three drainage channel groups and the three suction check chambers are connected one by one, and the raw water in the suction check chamber can be pressurized and discharged into the discharge check chamber 32 through the drainage channels. From Figure 6 It can be seen from the figure that the multiple water absorption channels K1 are arranged in a semicircular shape, and the multiple drainage channels K2 are arranged in an arc shape.

[0037] In the embodiment Figure 3 As shown, the fluid chamber 1 of the present invention is formed with a downwardly extending annular protrusion 11. When assembled with the diaphragm chamber 3, this annular protrusion 11 is press-fitted into a sealing engagement with the upper raised edge 31 of the diaphragm chamber 3. To ensure a tight connection between the two, an O-ring F is press-fitted between the protrusion 11 and the upper raised edge 31 to provide a seal. The high-pressure chamber Q2 of the present invention comprises the space enclosed by the upper raised edge 31 and the protrusion 11. In other words, the discharge check chamber 32 is part of the high-pressure chamber Q2. The low-pressure chamber Q1 of the present invention comprises the space outside the space enclosed by the protrusion 11 and the upper raised edge 31.

[0038] In the embodiment, the suction check valve 61 is provided in the suction check chamber of the present invention. The suction check valve 61 is used to make water flow in one direction and prevent the raw water sucked into the suction check valve 61 from returning to the low pressure chamber Q1. Figure 15 and Figure 13 As shown, the suction check valve 61 includes a suction valve plate 611 for sealingly fitting with the water suction channel K1 and a suction valve stem 612 connected to the center of the suction valve plate 611. A mounting hole 3a for inserting and assembling the suction valve stem 612 is formed in the center of the suction check cavity.

[0039] In the embodiment, the discharge check chamber 32 of the present invention is provided with a discharge check valve 62, which is used to prevent the water discharged into the discharge check chamber 32 from returning to the suction check chamber. Figure 14 As can be seen, the discharge check valve 62 comprises a discharge valve disc 621 and a discharge valve stem 622 connected to the center of the discharge valve disc 621. The discharge valve disc 621 is designed to seal against the drain channel K2 to achieve unidirectional water flow. A mounting hole 3b is formed in the center of the discharge check chamber 32 for inserting and assembling the discharge valve stem 622.

[0040] In the embodiment Figure 6 As shown, three grooves 3c are formed in the discharge check cavity 32 for dividing the three groups of drainage channel groups, and a dividing strip 623 is formed on the bottom surface of the discharge valve plate 621 for sealing and plugging with the groove 3c.

[0041] In the embodiment Figure 8 and Figure 9 As shown, the diaphragm body 4 of the present invention is formed with three independent sealing areas 41. Separating ribs are formed between adjacent sealing areas 41. The three sealing areas 41 correspond to the three suction check cavities, forming three independent pump chambers S. An annular retaining groove 42 is formed within the sealing area 41 for mounting the piston plate 7. The piston plate 7 is formed with a mounting collar 71 that snaps into the retaining groove 42. The movement of the piston plate 7 creates a pressure differential in the pump chamber S, continuously boosting the raw water through the pump chamber S and pumping it into the high-pressure chamber Q2.

[0042] In the embodiment Figure 1 and Figure 2 As shown, the motor housing 9 of the present invention comprises a cylindrical casing 91, a front cover 92, and a rear cover 93. The front cover 92 is fixedly mounted on the front end of the casing 91, while the rear cover 93 is fixedly mounted on the rear end of the casing 91. The rear cover 93 is formed with two carbon brush cavities 931 for slidingly mounting carbon brushes. The two carbon brush cavities 931 are circumferentially spaced 180 degrees apart on the rear cover 93. Each carbon brush cavity 931 is equipped with a carbon brush clip 94 for securing a carbon brush. The rear cover 93 is provided with a lead notch 932 for leading out the power cord, into which a lead protection cover 95 is mounted.

[0043] In the embodiment Figure 1 As shown, the aluminum support frame 2 is fixedly connected to the front end cover 92 of the motor housing 9, and a piston frame assembly cavity H is formed between the aluminum support frame 2 and the front end cover 92. The piston frame assembly cavity H contains a piston frame 8 that swings to push the piston plates 7 fixed to the diaphragm body 4 to move in a track. The piston frame 8 has a protrusion 81 formed at a position corresponding to each piston plate 7 for contacting and mating with the piston plate 7.

[0044] In the embodiment, a top cover sealing ring 54 for sealing is press-fitted onto the small top cover 51 , and a triangular sealing ring M is press-fitted between the fluid chamber 1 and the aluminum support frame 2 .

[0045] The operating principle of the present invention is as follows: a motor (not shown) mounted in motor housing 9 converts electrical energy into mechanical energy. This motor drives the eccentric balance wheel (not shown) at its front end into regular motion. The eccentric balance wheel, in turn, drives piston rack 8, which in turn pushes piston plate 7, fixed to diaphragm body 4, into orbital motion. This orbital motion of piston plate 7 creates an air pressure differential within the pump chamber, which comprises the suction check chamber of diaphragm chamber 3. This pressure differential causes raw water entering the pump body to continuously flow through low-pressure chamber Q1 and suction channel K1 into the suction check chamber. After being pressurized in the suction check chamber, the raw water is discharged through discharge channel K2, discharge check chamber 32, and high-pressure chamber Q2 through outlet 1b. A pressure regulating assembly 5 is provided within the fluid chamber. By controlling the preload of the pressure regulating spring within pressure regulating assembly 5, the discharge pressure of the diaphragm pump can be controlled.

[0046] The best embodiment of the present invention has been described, and various changes or modifications can be made by those skilled in the art without departing from the scope of the present invention.

Claims

1. A flat-head fluid chamber three-chamber pressure relief reverse osmosis diaphragm pump, comprising a fluid chamber (1), an aluminum support frame (2) and a motor housing (9) assembled in sequence from top to bottom; a diaphragm chamber (3) and a diaphragm body (4) are press-fitted in sequence between the fluid chamber (1) and the aluminum support frame (2); the diaphragm chamber (3) cooperates with the fluid chamber (1) to form a high-pressure chamber (Q2) and a low-pressure chamber (Q1) that are independent of each other; the low-pressure chamber (Q1) is connected to the water inlet (1a) of the fluid chamber (1), and the high-pressure chamber (Q2) is connected to the water outlet (1b) of the fluid chamber (1); and its characteristics are: The top surface of the fluid chamber (1) is a circular flat top surface, and a pressure regulating valve cavity (1c) is processed in the center of the flat top surface. The pressure regulating valve cavity (1c), the diaphragm chamber (3), the diaphragm body (4) and the motor housing (9) have the same axis; a pressure regulating assembly (5) for controlling the water pressure is installed in the pressure regulating valve cavity, and the pressure regulating assembly (5) includes a pressure regulating spring, a spring base (52) and a pressure regulating valve (53) which are press-fitted into the pressure regulating valve cavity in sequence through a small top cover (51); the horizontal plane of the upper surface of the small top cover (51) is slightly lower than the horizontal plane of the flat top surface of the fluid chamber (1), or the horizontal plane of the small top cover (51) is slightly lower than the horizontal plane of the flat top surface of the fluid chamber (1). The horizontal plane where the upper surface is located is flush with the horizontal plane where the flat top surface of the fluid chamber (1) is located; the bottom surface of the diaphragm chamber (3) is formed with three suction check cavities constituting a three-cavity structure diaphragm chamber, and the top ring center of the diaphragm chamber (3) is formed with a discharge check cavity (32) surrounded by a circular upper convex edge (31); the suction check cavity is provided with a water suction channel (K1) for connecting the suction check cavity and the low-pressure cavity (Q1), and the discharge check cavity (32) is provided with three groups of drainage channel groups for corresponding communication with the corresponding suction check cavities, and each group of the drainage channel groups is composed of a plurality of drainage channels (K2).

2. A flat-head fluid chamber three-chamber pressure relief reverse osmosis diaphragm pump according to claim 1, characterized in that: The fluid chamber (1) is formed with a convex ring (11) for sealing and press-fitting with the upper convex edge (31) of the diaphragm chamber (3), and an O-ring (F) is press-fitted between the convex ring (11) and the upper convex edge (31) to perform a sealing function; the high-pressure chamber (Q2) is composed of the space enclosed by the upper convex edge (31) and the convex ring (11).

3. The three-chamber pressure relief reverse osmosis diaphragm pump with a flat head fluid chamber according to claim 2, characterized in that: The suction check chamber is provided with a suction check valve (61) for preventing the inhaled water from returning to the low-pressure chamber (Q1). The suction check valve (61) comprises a suction valve plate (611) for sealingly fitting with the water suction channel (K1) and a suction valve stem (612) connected to the center of the suction valve plate (611). A mounting hole (3a) for inserting and assembling the suction valve stem (612) is formed at the center of the suction check chamber.

4. The flat-head fluid chamber three-chamber pressure relief reverse osmosis diaphragm pump according to claim 3, characterized in that: The discharge check chamber (32) is provided with a discharge check valve (62) for preventing discharged water from returning to the suction check chamber. The discharge check valve (62) comprises a discharge valve plate (621) for sealingly fitting with the drainage channel (K2) and a discharge valve stem (622) connected to the center of the discharge valve plate (621). An assembly hole (3b) for inserting and assembling the discharge valve stem (622) is formed in the center of the discharge check chamber (32).

5. The flat-head fluid chamber three-chamber pressure relief reverse osmosis diaphragm pump according to claim 4, characterized in that: Three grooves (3c) are formed in the discharge check cavity (32) for dividing the three groups of drainage channels (K2), and a dividing strip (623) is formed on the bottom surface of the discharge valve plate (621) for sealing and plugging with the grooves (3c).

6. The flat-head fluid chamber three-chamber pressure relief reverse osmosis diaphragm pump according to claim 5, characterized in that: Three mutually independent sealing areas (41) are formed on the diaphragm body (4), and the three sealing areas (41) correspond to the three suction check cavities one by one to form three mutually independent pump chambers (S); an annular groove (42) for installing the piston plate (7) is formed in the sealing area (41), and the piston plate (7) is formed with a plug-in protruding ring (71) for being inserted into the groove (42).

7. The flat-head fluid chamber three-chamber pressure relief reverse osmosis diaphragm pump according to claim 6, characterized in that: The motor housing (9) is composed of a cylindrical casing (91), a front end cover (92) and a rear end cover (93); the front end cover (92) is fixedly mounted on the front port of the casing (91), and the rear end cover (93) is fixedly mounted on the rear end of the casing (91); two carbon brush sliding cavities (931) for slidingly mounting carbon brushes are formed on the rear end cover (93), the two carbon brush sliding cavities (931) are 180 degrees apart in the circumferential direction, and each carbon brush sliding cavity (931) is equipped with a carbon brush clip (94) for clamping the carbon brush, and the rear end cover (93) is provided with a lead notch (932) for leading out a power line, and a lead protection cover (95) is clamped in the lead notch (932).

8. The flat-head fluid chamber three-chamber pressure relief reverse osmosis diaphragm pump according to claim 7, characterized in that: The aluminum support frame (2) is fixedly connected to the front end cover (92) of the motor housing (9), and a piston frame assembly cavity (H) is formed between the aluminum support frame (2) and the front end cover (92). The piston frame assembly cavity (H) is provided with a piston frame (8) that pushes the piston plate (7) fixed on the diaphragm body (4) to move in a track by swinging. The piston frame (8) is formed with a convex body (81) at a position corresponding to each piston plate (7) for contacting and cooperating with the piston plate (7).

9. The flat-head fluid chamber three-chamber pressure relief reverse osmosis diaphragm pump according to claim 8, characterized in that: A positioning cavity (1d) for positioning and cooperating with the small top cover (51) is formed on the flat top surface of the fluid chamber (1), and four threaded holes (1e) are formed in the positioning cavity (1d) with a medium arc. Four countersunk holes (511) for screws to pass through are formed on the top surface of the small top cover (51), and an annular positioning cavity (512) for cooperating with the upper end positioning sleeve of the pressure regulating spring is formed on the bottom surface of the small top cover (51).

10. The flat-head fluid chamber three-chamber pressure relief reverse osmosis diaphragm pump according to claim 9, characterized in that: A top cover sealing ring (54) for sealing is press-fitted on the small top cover (51), and a triangular sealing ring (M) is press-fitted between the fluid chamber (1) and the aluminum support frame (2).

Images