JP2004100584A - Diaphragm pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diaphragm pump, wherein the number of parts is minimized as far as possible, molding, etc., particularly of a suction valve, are easy, the valve can be smoothly opened/closed even by a weak force to attain reduction in pressure loss. <P>SOLUTION: The diaphragm pump has a diaphragm main-body formed integrally of one or more diaphragm parts conducting a pumping action. The suction valve extending to a pumping chamber is formed integrally with the diaphragm part. Thus, the number of parts is reduced, and the valve can be opened/closed smoothly, even though being small. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a diaphragm pump.
[0002]
[Prior art]
2. Description of the Related Art As a conventional diaphragm pump, a pump provided with a single cylindrical discharge valve shared by a plurality of pump chambers and integrated with a diaphragm section, and a suction valve such as an umbrella valve provided for each pump chamber is known. (See Patent Document 1)
Also known is a diaphragm pump in which each suction valve is integrated with a diaphragm section. (See Patent Documents 2 and 3)
[0003]
[Patent Document 1] Japanese Utility Model Publication No. 3-35905
[Patent Document 2] JP-A-7-293450
[Patent Document 3] Registered Utility Model No. 3078480
Among the above conventional examples, the diaphragm pump described in Patent Document 1 has a discharge valve integrated with a diaphragm portion. However, a suction valve is provided in each pump chamber, and the number of parts as a whole is reduced. It has not been reduced.
[0004]
Further, the diaphragm pumps described in Patent Documents 2 and 3 each have a suction valve integrated with a diaphragm portion, but most of the embodiments have a discharge valve provided for each pump chamber. Therefore, it cannot be said that the number of parts has been reduced.
[0005]
The applicant of the present application has developed a pump in which the number of parts is further reduced by integrating the suction valve with the diaphragm body, making the discharge valve a flat plate, and sharing one pump with a plurality of pump chambers. And filed.
[0006]
[Problems to be solved by the invention]
Among the conventional examples described in the above-mentioned documents, the diaphragm pump described in Patent Document 1 having a cylindrical discharge valve has a configuration as shown in FIG. In this figure, 31 is a motor, 32 is an output shaft of the motor 31, 33 is a crank base fixed to the output shaft 32, 34 is a drive shaft which is fixed to the crank base 33 by being inclined, 35 is a ball, and 36 is a drive shaft. A driving body rotatably mounted on the shaft 34, 37 is a casing, 38 is a cylinder part, 40 is a diaphragm main body, 41 is a diaphragm part, 42 is a cylindrical discharge valve, and 43 is an integral part of the diaphragm part 41. The diaphragm portion 41 and the discharge valve 42 are integrally formed by a driving portion (piston) formed in the above, and the diaphragm main body 40 is formed. The diaphragm main body 40 is held by a cylinder part 38 and a valve housing 45. Reference numerals 46 and 47 denote a valve chamber (common chamber) and a discharge port formed integrally with the valve housing 45, 48 denotes a suction valve, and 49 denotes a suction port.
[0007]
In the diaphragm pump having such a configuration, the crank base 33 is rotated by the rotation of the output shaft 32 driven by the motor 31. As the crankshaft 33 rotates, the direction of inclination of the drive shaft 34 fixed thereto changes. As a result, the drive section 36 also changes, and the drive section (piston section) 43 of the diaphragm section 41 attached to the drive section reciprocates to perform a pump action. That is, when the drive unit 43 rises as in the diaphragm section on the right side of the drawing, the volume of the pump chamber 44 decreases, the pressure increases, and the cylindrical discharge valve 42 is opened to open the pump chamber 44 formed in the valve housing 45. The fluid is discharged from the discharge port 47 through the groove 45a connecting the valve chamber 46 and the valve chamber. On the other hand, when the drive section descends like the left diaphragm section, the volume of the pump chamber 44 increases and the suction valve 48 is opened to allow the external fluid to flow into the pump chamber.
[0008]
As described above, due to the change in the volume of the pump chamber, the fluid flows from the outside into the pump chamber through the suction valve, and the next flowing fluid opens the discharge valve to perform a pumping operation from the discharge port.
[0009]
The diaphragm pump shown in FIG. 7 has a separate umbrella valve as a suction valve in each diaphragm part, and therefore, the number of parts is increased, the assembly is troublesome, and the cost increases. I have.
[0010]
A diaphragm pump in which a suction valve is integrated with a diaphragm section will be described based on the above-mentioned application using one discharge valve.
[0011]
The diaphragm pump of this application has a configuration as shown in FIG. In this figure, 31 is a motor, 32 is an output shaft of the motor 31, 33 is a crank base fixed to the output shaft 32, 34 is a drive shaft fixed to the crank base 33 so as to be inclined with respect to the output shaft 32, 35 Is a ball, and 36 is a driving body, which is rotatably attached to the driving shaft 34 by inserting the driving shaft 34 into its bearing portion 36a. 37 is a case having a suction port 37a, 38 is a cylinder part, 40 is a diaphragm main body having a diaphragm part 41, 44 is a pump chamber, 45 is a valve housing, 50 is a discharge valve attached to the valve housing 45, and 55 is a discharge valve. A gas collection having an outlet 56. Then, the case 37, the cylinder portion 38, the diaphragm main body 40, the valve housing 45, the discharge valve 50, the gas collection 55 and the like are assembled as shown in FIG.
[0012]
In this diaphragm pump, the diaphragm main body 40 is as shown in FIG. 9, in which (A) is a plan view and (B) is a side view (cross-sectional view). FIGS. 10A and 10B are views showing the shape of the cylinder portion 38, wherein FIG. 10A is a plan view and FIG. 11 is a plan view of the valve housing 45 (view from below in FIG. 8), FIG. 12 is a bottom view, (A) is a bottom view, (B) is a cross-sectional view, and FIG. , (A) is a plan view, and (B) is a sectional view.
[0013]
In this diaphragm pump, the above-described diaphragm section and the like are assembled as shown in FIG.
[0014]
Next, the components of the diaphragm pump and the overall configuration in an assembled state will be described in detail.
[0015]
First, the diaphragm main body 40 has a configuration as shown in FIG. 9, and a plurality of diaphragm portions 41 (three diaphragm portions 41 are arranged at equal intervals on the circumference as shown in the plan view of FIG. 9A). ) And each of the diaphragm portions 41, three thin planar valve portions 40a are formed, and each of the valve portions 40a is formed with a tongue-shaped suction valve 40b.
[0016]
Further, as shown in FIG. 10, the cylinder 38 has a hole 38b formed between the cylinders 38a where the respective diaphragms 41 are arranged.
[0017]
The valve housing 45 has a shape as shown in FIG. This figure is a view seen from below in FIG. 8, where 45a is a vent hole, 45b is a groove, and 45c is a valve mounting hole.
[0018]
The collecting gas 55 has a ring-shaped valve holder 55a as shown in FIG.
[0019]
Further, as shown in FIG. 13, the discharge valve 50 has a shape in which a flat plate (relatively thin disk) portion has a rib 50b extending from the center in three directions (when the pump chamber has three pumps). Each of the ribs 50b constitutes a valve 50a.
[0020]
The diaphragm pump is assembled by assembling the above components as follows.
[0021]
First, the discharge valve 50 is arranged in the valve housing 45 as shown in FIG. 8, and the gas collection 55 is further fixed to the valve housing 45 to be integrated.
On the other hand, the diaphragm main body 40 is attached to the cylinder part 38 such that the diaphragm part 41 is arranged in each cylinder 38a. The distal end of the driving section 43 of the diaphragm section 41 integrated with the diaphragm main body 40 is fixed to the driving body 36.
[0022]
The valve housing 45 holding the discharge valve 50 and the gas collection 55 are integrated as described above, and the combination of the cylinder 38 and the diaphragm body 40 attached to the case 37 is attached to integrate the whole. This forms the diaphragm pump shown in FIG.
[0023]
Next, the operation of the diaphragm pump will be described.
[0024]
The pump rotates an output shaft 32 by driving a motor 31 to rotate a crank base 33 fixed thereto. As a result, the drive shaft 34 changes its inclination direction, changes the inclination direction of the driving body 36, and moves the drive unit 43 of the diaphragm unit 41 up and down similarly to the conventional pump of FIG.
[0025]
The volume of the pump chamber 44 changes due to the vertical movement of the drive unit 43. When the driving portion 43 of the diaphragm portion 41 rises higher than that in FIG. 8, the volume of the pump chamber 44 decreases and the pressure increases, thereby opening the valve portion 50a of the discharge valve 50 and passing between the ribs 50b to collect the gas in FIG. The air is supplied to the outside from the discharge port 56 through the gap between the valve housing 55 and the valve housing 45. At this time, the discharge valve (valve part 50a) corresponding to the other diaphragm part is closed.
[0026]
When the drive unit 43 of the diaphragm unit 41 on the right side in FIG. 8 is lowered and the volume of the pump chamber 44 increases, the pressure in the pump chamber decreases, and the discharge valve 50 (valve unit) closes. Conversely, the flat thin portion (suction valve) 40b of the diaphragm main body is deformed and opened upward in the drawing, whereby the fluid in the space of the cylinder portion 38 and the case 37 flows from the hole 38a of the cylinder portion 38, and further the valve It flows into the diaphragm through the groove 45b of the housing 45. At this time, a fluid flows into the case 37 from the outside through a vent 37a provided in the case 37.
[0027]
By repeating such an operation, the pump chamber continuously performs the inflow and outflow of the fluid to perform the pump action.
[0028]
Further, the other diaphragm portions (pump chambers) perform the pumping operation by exactly the same operation. Further, in the pump shown in FIG. 8, the drive mechanism has the same structure as described above, and the continuous change in the inclination direction of the driver causes the operation of each of the diaphragm portions at a constant phase difference to thereby provide a substantially continuous fluid. Feeding takes place.
[0029]
The pump of this figure has the above-described configuration, and the suction valve and the discharge valve are both formed integrally with a plurality of valves, so that the number of parts is small.
[0030]
However, in the diaphragm pump shown in FIG. 8, the ventilation port 37a is provided near the connection portion with the motor 31 on the side wall of the case 37.
[0031]
As described above, when the vent 37a is provided on the side wall of the case 37, when the pump is incorporated into a product using the pump, the vent 37a may be blocked, which is not preferable.
[0032]
Further, in the diaphragm pump of FIG. 8 in which the suction valve is formed integrally with the diaphragm main body, the suction valve is provided between the respective diaphragm portions forming the pump chamber of the diaphragm main body. The area between the diaphragms is small, especially for small pumps. Therefore, the area of the valve (the area of the valve portion 40b in FIG. 9) cannot be increased.
[0033]
As described above, since the area of the valve is extremely small, sufficient operation cannot be performed with a weak pressure, and the pressure loss is large.
[0034]
Further, the suction valve and the pump chamber are connected by a narrow and relatively long groove, and the pumping action is performed through this groove, so that the pressure loss is further increased.
[0035]
Therefore, efficient valve action and pump action cannot be performed.
[0036]
Further, since the diaphragm body needs to be easily deformed, a material having sufficient elasticity such as rubber is used.
[0037]
For this reason, even if the molded body of the diaphragm body having the suction valve is assembled as it is, the suction valve portion does not serve as a valve because it is not completely separated from the others. Unless it is separated from the others, it cannot function as a suction valve.
[0038]
It should be noted that the pumps described in Patent Documents 2 and 3 also have the same structure as the suction valve described in FIG. 9 and the like, and have the above-described disadvantages. In addition, there is a problem that the number of parts cannot be reduced as described above.
[0039]
SUMMARY OF THE INVENTION The present invention provides a diaphragm pump in which a suction valve is integrated with a diaphragm main body, and has a simple structure and is easy to assemble.
[0040]
[Means for Solving the Problems]
A diaphragm pump according to the present invention includes a diaphragm body integrally formed with one or a plurality of diaphragm portions, a valve housing that covers each of the diaphragm portions to form a pump chamber, and extends to the pump chamber side from the diaphragm portion to be integrated therewith. And a suction valve provided at a position where the suction valve of the valve housing is located, one discharge valve, and a discharge port. Due to the reciprocating motion of the driving unit (piston) provided in the diaphragm unit (if there are a plurality of diaphragm units, they reciprocate sequentially with a constant phase difference), the suction valve is opened, and external air is supplied from the suction port to the pump chamber. The inflowing air in the pump chamber can be supplied to the outside through a discharge port by opening a discharge valve.
[0041]
In the diaphragm pump of the present invention, the number of parts can be reduced by providing the suction valve integrally with the diaphragm.
[0042]
In addition, the diaphragm pump of the present invention has a second configuration using a flat valve in addition to the first configuration using a cylindrical valve as a discharge valve.
[0043]
According to a second configuration of the diaphragm pump of the present invention using the flat discharge valve, a vent hole is provided at a position corresponding to each diaphragm portion (pump chamber) of the valve housing, and a flat discharge hole is formed at a position closing the vent hole. A valve is provided.
[0044]
A second configuration of the diaphragm pump of the present invention using the flat discharge valve uses a gas collection to press and hold the discharge valve arranged in the valve housing, and is formed by the gas collection and the valve housing. The space is divided into a suction side and a discharge side, and a suction port is provided to communicate with the suction side space of the collected gas, and air introduced from the outside is guided to the pump chamber through the suction side space, thereby achieving a noise reduction effect.
[0045]
Further, in the above-mentioned second configuration of the present invention, a first flow path which penetrates the gas collection, the valve housing, the diaphragm main body and the like is formed so that the outside and the inside of the case are communicated by this flow path. One side of the valve housing, the diaphragm body and the like is formed with another second flow path to communicate the space in the case with the suction side space of the space formed between the gas collection and the valve housing. Accordingly, in the pumping operation, the external air flows into the case through the first flow path, passes through the second flow path, enters the suction side space, and opens the suction valve to enter the pump chamber.
[0046]
In the second configuration in which the first and second flow paths are provided as described above, air from the outside is provided in two spaces: a space in the case and a space on the suction valve side between the gas collection and the valve housing. By passing through a large space, the noise reduction effect becomes greater.
[0047]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of a diaphragm pump according to the present invention will be described with reference to the drawings.
[0048]
FIG. 1 is a view showing a first embodiment of the present invention. The diaphragm pump of this embodiment is an embodiment in which the drawbacks of the conventional diaphragm pump shown in FIG. 7 are eliminated.
[0049]
In this drawing, 1 is a motor, 2 is an output shaft of the motor 1, 3 is a crankshaft fixed to the output shaft 2 of the motor, 4 is a drive shaft inclined and fixed to the crankshaft 3, 5 is a ball, and 6 is a drive shaft. A driving body rotatably mounted on the shaft 4, 7 is a case, 8 is a cylinder, 9 is a valve housing, and 10 is a diaphragm main body in which a diaphragm 10a and a cylindrical discharge valve 10b are integrally formed. The valve housing 9 has a common chamber 9a serving as a valve chamber, a discharge port 9b, a suction port 9c, and a groove 9d connecting the pump chamber 11 and the common chamber 9a. Further, a driving unit (piston) 10c is provided integrally with the diaphragm unit 10a of the diaphragm main body 10. In the diaphragm main body 10, each diaphragm portion 10a is inserted into the cylinder 8a of the cylinder portion 8, and the discharge valve 10b is inserted and arranged in the common chamber 9a of the valve housing 9. Hold it between. The above configuration is substantially the same as the conventional example shown in FIG.
[0050]
However, the pump of the first embodiment is characterized in that the suction valve is formed integrally with the diaphragm main body 10 and particularly formed so as to extend toward the pump chamber 11 with the diaphragm portion 10a. That is, in FIG. 1, 10 d extending from the diaphragm part 10 a is a suction valve, and a suction port 9 c is provided at a position of the valve housing 9 where the suction valve 10 d is located.
[0051]
In the first embodiment of the present invention, the diaphragm 10a, the discharge valve 10b, the suction valve 10d, and the like are all configured as one component. As a result, the number of parts could be substantially reduced. Further, as shown in FIG. 1B, the suction valve 10d is integral with the diaphragm portion 10a and extends from the diaphragm portion 10a toward the pump chamber 11, that is, extends toward a wide space. Valve. Therefore, the opening and closing of this valve has the advantage that it can respond to a small change in pressure, has a small pressure loss, and can be operated smoothly. Further, when the diaphragm main body 10 is manufactured, all of the diaphragm portion 10a, the discharge valve 10b, the drive portion 10c, and the suction valve 10d can be formed at once by using a material such as rubber. In addition, the periphery of the suction valve 10d is a relatively large space, so that the suction valve is not manufactured in a state where it is connected to a portion other than the diaphragm portion 10a, and it is not necessary to separate the valve portion after manufacturing. Further, since the portion (opening) of the diaphragm portion 10a forming the pump chamber is relatively wide, the size and shape of the suction valve 10d can be freely selected, so that the size and shape can be selected according to the purpose and application. It is.
[0052]
Next, a second embodiment of the diaphragm pump according to the present invention will be described.
[0053]
The second embodiment has a configuration as shown in FIG. 2, wherein 1 is a motor, 2 is an output shaft, 3 is a crank base, 4 is a drive shaft, 5 is a ball, 6 is a driving body, 7 is a case, Reference numeral 8 denotes cylinders, which are substantially the same as those in the first embodiment.
[0054]
However, the valve housing 9, the diaphragm main body 10 and the like are different from those of the first embodiment. That is, the diaphragm main body 10 is different from the first embodiment in which the discharge valve is integrated, and is made as a separate component. Therefore, the diaphragm main body 10 has a diaphragm portion 10a, a driving portion 10c, and a suction valve 10d. It is a simple structure consisting of: Accordingly, the valve housing 9 is configured to include a suction-side ventilation hole 9d, a discharge-side ventilation hole 9e, and a valve mounting protrusion 9g. Reference numeral 12 denotes a discharge valve in which the mounting recess 12c is fitted to the valve mounting projection 9g of the valve housing 9, and reference numeral 13 denotes a gas collection having a discharge port 13a. The discharge valve is as shown in FIGS. 2B and 2C, wherein FIG. 2B is a plan view and FIG. 2C is a sectional view. This discharge valve has ribs 12b as in the valve shown in FIG. 2, and the space between them is a valve portion 12a. However, it differs in that it has a mounting recess 12c.
[0055]
Then, after the discharge valve 12 is arranged in the valve housing 9 as described above, the gas collection 13 is fixedly arranged. At this time, the discharge valve 12 is pressed by the valve presser 13c provided in the gas collection 13, so that the discharge valve 12 is securely held. Further, the valve housing 9 is provided with a partition wall 9f that protrudes in a circumferential shape (ring shape), so that the suction side space A and the discharge side space B are airtightly partitioned.
[0056]
The second embodiment has the configuration as described above, and the rotation of the output shaft 2 by the driving of the motor 1 causes the crank base 3 to rotate and the inclination direction of the drive shaft 4 to change. Due to the change in the tilt direction of the drive shaft 4, the tilt of the drive body 6 also changes, and the drive unit (piston) 10c reciprocates. When the drive unit 10c descends, the suction valve 10d formed in the diaphragm unit 10a opens, and the fluid flowing from the suction port 13b of the collected gas 13 flows into the pump chamber 11 through the suction side space A. I do.
[0057]
On the other hand, when the drive section 10c of the diaphragm section 10a rises, the suction valve 10d closes, the discharge valve 12 opens, and the fluid in the pump chamber 11 passes through the discharge side space B and is discharged from the discharge port 13a.
[0058]
In the second embodiment, the present invention is applied to the conventional diaphragm pump shown in FIG.
[0059]
The second embodiment has more parts than the first embodiment, but has the advantage of being extremely easy to assemble as compared to the first embodiment. Another advantage is that the diaphragm body has a very simple structure.
[0060]
Further, in the second embodiment, the air flowing from the suction port 13b of the collected gas 13 passes through the suction side space A having a certain volume, and then opens the suction valve 10d to enter the pump chamber. It has a silencing effect. However, in order to further increase the volume of this space and obtain a sufficient noise reduction effect, the entire pump is undesirably large.
[0061]
Next, a third embodiment of the present invention is configured as shown in FIG. 3 so as to simplify the configuration of the diaphragm main body, facilitate assembly, and obtain a further noise reduction effect while keeping the pump small. It was done.
[0062]
The diaphragm pump shown in FIG. 3 includes a motor 1, an output shaft 2, a crankshaft 3, a drive shaft 4, a ball 5, a driver 6, a case 7, a cylinder portion 8, a valve housing 9, a diaphragm body 10, a discharge valve 12, The structure is substantially the same as that of the second embodiment shown in FIG.
[0063]
However, in the third embodiment, as shown in FIG. 3, a first flow path 14 penetrating all of the gas collection 13, the valve housing 9, the diaphragm main body 10, and the cylinder portion 8 is formed, And the other (outside of the pump), and another second flow path 15 penetrating through the cylinder portion 8, the diaphragm main body 10, and the valve housing 9 at another place. , The interior of the case 7 and the space A are communicated.
[0064]
According to the third embodiment, with this configuration, the pumping action of the diaphragm pump causes the fluid from the outside to enter the case 7 through the first flow path 14 through the suction port 13b, 7 and enters the space A through another second flow path 15, opens the suction valve 10 d and enters the pump chamber 11. On the other hand, as in the second embodiment, the fluid in the pump chamber 11 is opened through the discharge valve 12, passes through the space B, and is discharged from the discharge port 13 a of the gas collection 13.
[0065]
In the third embodiment, the same pumping action is performed with substantially the same configuration as that of the second embodiment. However, by providing the first and second flow paths 14 and 15, the Since the air enters the pump chamber through the space A, which has become somewhat wider, through the narrow air hole again after entering the case having a large volume, the noise reduction effect is further enhanced.
[0066]
In the third embodiment shown in FIG. 3, the first flow path and the second flow path are arranged side by side. However, these channels need not necessarily be arranged adjacent to each other.
[0067]
For example, as shown in the schematic diagram of FIG. 4, a combination of the first flow path 14 and the second flow path 15 'or a combination of the first flow path 14 and the second flow path 15 "may be used.
[0068]
As described above, one of the features of the present invention is that the suction valve is integrated with the diaphragm so as to be located in the pump chamber. However, substantially the same configuration can be achieved without integrating the suction valve with the diaphragm.
[0069]
FIG. 5 and FIG. 6 show an embodiment in which the suction valve and the diaphragm are separate parts.
[0070]
Among these embodiments, the diaphragm pump according to the fourth embodiment shown in FIG. 5 is an example in which the suction valve is a separate part from the diaphragm part in the diaphragm pump according to the second embodiment shown in FIG. .
[0071]
As shown in FIG. 4, the diaphragm pump according to the fourth embodiment has openings 16a having the same area as the opening of the diaphragm 10a at positions corresponding to the number of the diaphragms and at positions corresponding to the positions of the diaphragms. A suction valve body 16 having a suction valve 16b extending toward the opening 16a is arranged so as to overlap the diaphragm body 10. On the other hand, in the diaphragm main body 10, unlike the second embodiment, the diaphragm portion 10a has no suction valve 10d extending therefrom.
[0072]
Other structures are substantially the same as those of the pump of the second embodiment.
[0073]
In the fourth embodiment, the number of parts is increased by further including the suction valve body 16. However, the shape of the diaphragm body is much simpler, and the shape of the suction valve body is also very simple. In addition, the diaphragm main body 10 and the suction valve main body 16 are simply arranged so as to overlap each other, and the assembly of the pump is extremely simple.
[0074]
Next, a fifth embodiment shown in FIG. 6 differs from the third embodiment shown in FIG. 3 in that the suction valve is separated from the diaphragm as in the fourth embodiment, and As a separate part.
[0075]
Therefore, except for providing the holes 16c and 16d for forming the first and second flow paths, the shape of the suction valve main body 16 is the same as that of the fourth embodiment.
[0076]
In the pump of the first embodiment, the suction valve portion may be a separate component as the suction valve body.
[0077]
In each of the embodiments described above, the drive shaft 4 is fixed to the crank base 3, but the drive shaft 4 is fixed to or integrally formed with the drive body 6, and the crank base 3 is provided with an inclined hole. It may be configured to be rotatably inserted. In that case, the ball 5 is unnecessary. Also, in each of the embodiments, the ball 5 does not necessarily have to be provided.
[0078]
【The invention's effect】
The diaphragm pump of the present invention has a small suction valve and can be formed integrally with the diaphragm main body, so that the number of parts is small and the assembly is simple.
[0079]
In addition, a gas collection is provided, and a space is formed between the gas collection and the valve housing so that external air to be sucked in enters the pump chamber through this space, thereby providing a noise reduction effect.
[0080]
Further, if the first and second flow paths are provided to guide the air from the outside to the inside of the case and then to the pump chamber through the suction side space, an extremely quiet diaphragm pump can be formed. .
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a first exemplary embodiment of the present invention.
FIG. 2 is a diagram showing a configuration of a second exemplary embodiment of the present invention.
FIG. 3 is a diagram showing a configuration of a third exemplary embodiment of the present invention.
FIG. 4 is a view showing an example of positions where first and second flow paths are provided in the third embodiment.
FIG. 5 is a diagram showing a configuration of a fourth embodiment of the present invention.
FIG. 6 is a diagram showing a configuration of a fifth embodiment of the present invention.
FIG. 7 is a diagram showing a configuration of a conventional diaphragm pump using a cylindrical discharge valve.
FIG. 8 is a diagram showing a configuration of a conventional diaphragm pump in which a suction valve is integrated with a diaphragm portion and a flat discharge valve is used.
9 is a diagram showing a configuration of a diaphragm main body of the diaphragm pump shown in FIG.
FIG. 10 is a diagram showing a configuration of a cylinder portion of the diaphragm pump shown in FIG.
FIG. 11 is a plan view of the valve housing of the diaphragm pump shown in FIG. 8 (a view seen from below).
FIG. 12 is a diagram showing a configuration of gas collection of the diaphragm pump shown in FIG. 8;
FIG. 13 is a view showing a discharge valve used in the diaphragm pump shown in FIG. 8;
[Explanation of symbols]
1 motor
2 Output shaft
3 Crankshaft
4 Drive shaft
5 balls
6 Driver
7 cases
8 Cylinder section
9 Valve housing
10 Diaphragm body
10a Diaphragm part
10b Cylindrical discharge valve
10c drive unit (piston)
10d suction valve
11 Pump room
12 Flat discharge valve
13 Collected gas
14 First channel
15 Second flow path
16 Suction valve body
16b suction valve

Claims (6)

A diaphragm body integrally formed with one or a plurality of diaphragm portions forming a pump chamber; a suction valve formed integrally with the diaphragm and extending to the pump chamber side; and a suction valve provided at a different position from the suction valve of the diaphragm portion. A diaphragm pump having a discharge valve and performing a pumping operation by reciprocating motion of a drive unit provided in each of the diaphragm units. A diaphragm body integrally formed with one or a plurality of diaphragm portions forming a pump chamber, and an inlet having an opening at a position corresponding to the pump chamber arranged to be overlapped with the diaphragm body and having a suction valve extending toward the opening side A diaphragm pump including a valve body and a discharge valve, wherein a pump action is performed by reciprocating motion of a drive unit provided in each of the diaphragm units. The diaphragm pump according to claim 1, wherein the discharge valve has a cylindrical shape and is formed integrally with the diaphragm main body. 3. The valve according to claim 1, further comprising a valve housing that covers an opening of the diaphragm portion or the suction valve body, wherein the discharge valve is a single plate-shaped valve disposed on a surface of the valve housing opposite to the diaphragm portion. 4. Diaphragm pump. A gas collecting portion having a valve holding portion for holding and holding the flat discharge valve, wherein the gas collecting portion has a partition portion for partitioning a space formed between the gas collecting portion and the valve housing into a suction side and a discharge side. The collected gas has an air suction port communicating with the suction side space and a discharge port communicating with the discharge side space. When performing a pumping operation, external air flows in from the air suction port and passes through the suction side space. 5. The diaphragm pump according to claim 4, wherein the suction valve is opened to flow into the pump chamber, and further the discharge valve is opened from the pump chamber to be supplied to the outside through the discharge side space through the discharge port. A first flow path that penetrates the gas collection, the valve housing, and the diaphragm main body and directly communicates with the outside and the inside of the pump case; and a second flow path that directly communicates the case with the suction side space of the gas collection. Wherein, when performing a pumping operation, air from the outside flows through the first flow path into the case, further flows into the suction side space from inside the case, and then flows into the pump chamber. 5. Diaphragm pump.

Images