| Diaphragm pump of constant pressure type -> Monitor Keywords |
|
|
 
Diaphragm pump of constant pressure typeRelated Patent Categories: Pumps, Condition Responsive Control Of Pump Drive Motor, Responsive To Pump Or Pump Fluid TemperatureDiaphragm pump of constant pressure type description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070201985, Diaphragm pump of constant pressure type. Brief Patent Description - Full Patent Description - Patent Application Claims
FIELD OF THE PRESENT INVENTION [0001] The present invention relates to the pressurized diaphragm pump, which being exclusively used in the reverse osmosis purification apparatus, particularly for the capability of discharging the exceeding water pressure in the compressed chamber of the pressurized diaphragm pump out of its pump cover body, then directing it into the low pressure chamber by way of the inlet port; so that the water pressure of the outlet port in said pump cover body can be kept in a expected constant value. BACKGROUND OF THE INVENTION [0002] Currently, the pressurized diaphragm pump types used in the reverse osmosis purification apparatus, such as U.S. Pat. Nos. 4,396,357, 4,610,605, 5,476,367, 5,571,000, 5,615,597, 5,626,464, 5,649,812, 5,706,715, 5,791,882, 5,816,133, 6,048,183, 6,089,838, 6,299,414, 6,604,909, 6,840,745 and 6,892,624 are all disclosed; The best seller of the pressurized diaphragm pump exclusively used in the conventional reverse osmosis purification apparatus is shown in the FIG. 1 through FIG. 3, comprising: a motor 10; an upper lid chassis 11, which being on the top end of the output shaft (not shown in the figure) of said motor 10, has some screw bores 12 set up on its circumference; some wobble plates 13, which being hinged in said upper lid chassis 11, are driven by the output shaft of said motor 10 and being transferred into axially reciprocating motion; a diaphragm valve frame 20, which covering on said upper lid chassis 11, has a high pressure valve 21 embedded in the center of its top with some low pressure valves 22 being embedded at the bottom side of the circumference of said high pressure valve 21; and a pump cover body 30; All the components aforesaid are firmly screwed together as a integral body by the bolts 2 running through said screw bores 12 on said upper lid chassis 11 and corresponding perforated bores 36 on said pump cover body 30 (as shown in the FIG. 2). [0003] Wherein said pump cover body 30, an inlet port 31 and an outlet port 32 are contrived on both corresponding ends of its outer rim; a ladder groove 37 is circled at the bottom of its inner side such that can stay closely with the periphery of said diaphragm valve frame 20; an annular groove 38 facing towards said ladder groove 37 is raised in the center of its inner side with an outlet orifice 35 perforated to conduct with said outlet port 32; Wherein, the top end of said annular groove 38 presses closely with the periphery of said high pressure valve 21 on said diaphragm valve frame 20, so that a compressed chamber 34 is formed between the inner side of said annular groove 38 and said diaphragm valve frame 20 as well as some low pressure chamber 33 being formed among the outer side of said annular groove 38 and the inner side of said pump cover body 30 (as shown in the FIG. 1 and the FIG. 2). [0004] Refer to the FIG. 1 through the FIG. 3, the unfiltered feed water W, which entering said inlet port 31 of said pump cover body 30, first reaches said low pressure chamber 33 for being increased its pressure up to 60 psi.about.120 psi normal rated pressure; In said low pressure chamber 33, the reciprocating axially motion of said wobble plates 13 driven by said motor 10 will force all said low pressure valves 22 movement orderly for suction and compression of said feed water W so as to increase to water pressure; The pressurized feed water W flows into said compressed chamber 34 through high pressure valve 21, next passes said outlet orifice 35 of said annular groove 38, then directly drains out of the pressurized diaphragm pump from said outlet port 32 of said pump cover body 30; Said pressurized feed water W with water pressure, which conforms to the normal rated water pressure of the reverse osmosis semi-permeable membrane filter cartridge or module (not shown in the figure, hereinafter called RO membrane), is output and supplied to the reverse osmosis purification apparatus for filtration and purification. [0005] Currently, all the various RO membrane in the market have mark indicating the normal rated water pressure and the service life in different specification basically depending on the quantity of water being filtrated; For example, the RO membrane with less filtrating quantity of water might have mark indicating that the quantity of the product filtrated drinking water per day under normal rated water pressure of 60 psi is 10 gallons, and the total filtrating quantity of water in durable service life is 1500 gallons; Hence, the output water pressure of the pressurized diaphragm pump to be used in match with such RO membrane is better not to exceed 60 psi, otherwise it will quickly shorten the service life of said RO membrane. For some non-residential places, which demand much more quantity of product water, the RO membrane with ample specification will be adopted for having relative high normal rated water pressure up to 100 psi.about.120 psi and the quantity of the product filtrated drinking water per day is up to 160 gallons; In this case, the output water pressure of the pressurized diaphragm pump to be used in match with such RO membrane is better to reach 120 psi. Therefore, all the domestic or overseas manufacturers of the pressurized diaphragm pump will specify their product with normal rated water pressure of 120 psi to meet different specifications of the RO membrane. [0006] However, the way described above has serious drawback in discrepancy of the pressurized diaphragm pump and the RO membrane, namely the normal rated water pressure of the RO membrane is 60 psi or 70 psi and that of the pressurized diaphragm pump is 120 psi; Under such circumstance, the fibrous filter material in the RO membrane will be torn so that the interstices in between become bigger gradually due to constant high pressure stress; Thereby, not only the function in filtering the turbidity of impurities is diminished, but also the durable service life is shortened; Thus, the consumer becomes a victim owing to the frequency of replacing new RO membrane is increased in consequence of these adverse effects aforesaid. Moreover, as shown in the FIG. 3, the RO membrane will be gradually fouled by the filtered impurities during filtering service time; Hence the pressurized water coming from the compressed chamber 34 in the pump cover body 30 of the pressurized diaphragm pump can not completely flow into said pump cover body 30 and resulting in backwater pressure against the diaphragm valve frame 20; Thereby, the leakage will happens between said pump cover body 30 and said diaphragm valve frame 20 due to constant backwater pressure in long-term; Again, the consumer becomes a victim out of luck owing to the timing of replacing said entire pressurized diaphragm pump is earlier than the marked expiry time in consequence of the leakage aforesaid. [0007] The drawbacks aforesaid include all the conventional pressurized diaphragm pumps of USA patents disclosed; Since 1985 the pressurized diaphragm pump was invented, there was not any contrivance to remedy the drawbacks aforesaid for a long time until recently three years when new contrivance of the pressurized diaphragm pump with design in regulating the exceeding high water pressure in the compressed chamber 44 being introduced into market; the structure is as shown in the FIG. 4 through the FIG. 7, A pressure discharge cavity 47 is formed in the center of the compressed chamber 44, which being in the inner side of the pump cover body 40, and a pressure adjusting base 50 is built in the top center of the outer side of said pump cover body 40, wherein: In said pressure discharge cavity 47, a pressure discharge orifice 48 is perforated at the center at its bottom side, and a pressure discharge channel 49 is perforated at it lateral side such that the end conducts to the low pressure chamber 43; For said pressure adjusting base 50, pressure adjusting screw 51 is inset in its center such that the end internally with a compressed spring 52 and a baffle rod 53 protruding into said pressure discharge cavity 47; Said baffle rod 53 stays closely against said pressure discharge orifice 48 of said pressure discharge cavity 47 by the spring force of said compressed spring 52. Refer to the FIG. 8 and FIG. 9, when the feed water W flows into said low pressure chamber 43 through said inlet port 41, its pressure will be increased by the action of the wobble plate 13; Then, said feed water W flows into said compressed chamber 44 through said low pressure valve 22 and high pressure valve 21; Finally, said feed water W flows for the RO membrane with normal rated pressure through said outlet orifice 46 and outlet port 42; Under normal rated pressure, said baffle rod 53 will stay closely and block said pressure discharge orifice 48 of said pressure discharge cavity 47 by means of the spring force of said compressed spring 52 acting on said baffle rod 53; Therefore, all the pressurized feed water W from said compressed chamber 44 will output out of said pump cover body 40 through outlet orifice 46 and outlet port 42 (as shown in the FIG. 8); When the water pressure in said compressed chamber 44 exceeds the normal rated pressure, the water pressure will push said baffle rod 53 off said pressure discharge orifice 48 to allow the extra water pressure feedback into said low pressure chamber 43 through said pressure discharge orifice 48 and pressure discharge cavity 47 as well as pressure discharge channel 49 (as shown in the FIG. 9) so as to regulate the water pressure in said compressed chamber 44. However, the conventional pressurized diaphragm pump of internal pressure regulating type actually does not discharge the internal extra water pressure out of itself; It only constantly circulates the extra water pressure among said compressed chamber 44 and said low pressure chamber 43; So, the problem of the holding and exceeding of the water pressure in said compressed chamber 44 will happen after said pressurized diaphragm pump running for a period of time. [0008] Accordingly, after the inventor of the present invention finds out the drawback aforesaid, he renders a remedy contrivance and patent application to the IPO of Taiwan at Jan. 14 of 2003 as well as being allowanced and granted the patent number 225942 (publication number: 595656) in file. Its structure is as shown in the FIG. 10 through 14: In the pressure adjusting groove 68, which being indented at the outer top of the pump cover body 60 with facing inwards of the annular groove 65, a pressure discharge orifice 67 is perforated at its bottom side with facing towards said annular groove 65; For said pressure adjusting groove 68, an adjusting screw 200 is inset in said pressure adjusting groove 68 such that the end internally with a compressed spring 201 and a baffle lump 202; Wherein, said baffle lump 202 stays closely against said pressure discharge orifice 67 by the spring force of said compressed spring 201. [0009] Refer to the FIG. 11 and the FIG. 13, when the water pressure of the pressurized feed water W from said compressed chamber 64 is under normal rated pressure, said baffle lump 202 can not be pushed off and will still block said pressure discharge orifice 67; Therefore, all the pressurized feed water W from said compressed chamber 64 will output out of said pump cover body 60 through outlet orifice 66 and outlet port 62 (as shown in the FIG. 11); When the water pressure in said compressed chamber 64 exceeds the normal rated pressure, the water pressure will push said baffle lump 202 off said pressure discharge orifice 67 to allow the extra water pressure discharge out of said pump cover body 60 through said pressure discharge orifice 67 and pressure discharge port 69 (as shown in the FIG. 13); When the water pressure in said compressed chamber 64 descends back below the normal rated pressure, said baffle lump 202 will bounce back by the spring force of said compressed spring 201 to return closely and block said pressure discharge orifice 67 to inhibit the extra water pressure discharge out so as to keep the water pressure in said compressed chamber 64 in the range of normal rated water pressure (as shown in the FIG. 11); Therefore, the aforesaid pressurized diaphragm pump contrived by the identical inventor of the present invention is a real effective remedy in regulating the exceeding water pressure as well as discharging the extra water pressure out. Moreover, in order to prevent the water drained out of said pressure discharge port 69 from spilling everywhere, a water pipe P sleeves on said pressure discharge port 69 so as to guide the drained water into the water container (as shown in the FIG. 14). [0010] Because the aforesaid pressurized diaphragm pump contrived by the identical inventor of the present invention can completely meet the normal rated water pressure in all kinds of the RO membrane as well as free the consumer from frequently replacing said RO membrane and said pressurized diaphragm pump, it received popularly good feedback comments after being introduced in the market. But, said applicant is not satisfied with this achievement, he keeps constantly contemplation, research and study as well as attempts anxiously to breakthrough in order to reach better condition; Thereby, he finds out some issues to be improved as below: [0011] 1. Although the extra water, which being drained out of the pump cover body 60 from the pressure discharge port 69, can be guided into a general water container for collecting to reuse, it causes the user another boring matter in need of preparing water container or burdensome collecting water; For convenience, most of the consumers will select to dump it out and resulting in wasting water resource. [0012] 2. The water running noise accompanying with the draining of the extra water out of the pump cover body 60 from the pressure discharge port 69 will interfere with the internal calmness and peace of the residential environment. SUMMARY OF THE INVENTION [0013] A main object of the present invention is to provide a diaphragm pump of constant pressure type, mainly wherein a passage tube links between said pressure discharge port and said inlet port of said pump cover body; Thereby, the extra water pressure coming from said compressed chamber can be orderly discharged through said pressure discharge port, next guided through said passage tube to reach said inlet port, then directly flowed into said low pressure chamber; Therefore, a close water circulation loop of discharge pressure is built by means of connecting said compressed chamber, said pressure discharge port, said passage tube, said inlet port and said low pressure chamber; Thus, it not only saves the drain water by the extra water pressure from directing into the other prepared container, but also solves the inconvenience and wasting in reluctantly recycling from the side effect of such inconvenience. [0014] Another object of the present invention is to provide a diaphragm pump of constant pressure type, wherein the extra water pressure will directly flow into said inlet port to converge with the input water pressure; Thereby, the total input water pressure of the pressurized diaphragm pump is increased so as to save the motive power of the motor indirectly as well as achieving the energy-saving effect of saving power consumption. [0015] The other object of the present invention is to provide a diaphragm pump of constant pressure type, wherein a circulating buffer annular groove is indented around said pressure discharge orifice at the outer circumference of the intersection of said pressure adjusting groove and said pressure discharge orifice; Thereby, the extra water pressure being forced to flow into said circulating buffer annular groove before running into said pressure discharge port; Thus, it has the effect in reducing the operation noise of the pressurized diaphragm pump. BRIEF DESCRIPTION OF THE DRAWINGS [0016] FIG. 1 is the perspective exploded view of the conventional pressurized diaphragm pump. [0017] FIG. 2 is the first illustrative view showing the cross-section of the pump cover body in the conventional pressurized diaphragm pump. [0018] FIG. 3 is the second illustrative view showing the cross-section of the pump cover body in the conventional pressurized diaphragm pump. [0019] FIG. 4 is the first illustrative view showing the perspective of the pump cover body in the conventional pressurized diaphragm pump of internal pressure regulating type. [0020] FIG. 5 is the second illustrative view showing the perspective of the pump cover body in the conventional pressurized diaphragm pump of internal pressure regulating type. Continue reading about Diaphragm pump of constant pressure type... Full patent description for Diaphragm pump of constant pressure type Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Diaphragm pump of constant pressure type patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Diaphragm pump of constant pressure type or other areas of interest. ### Previous Patent Application: Fan rotational speed controlling circuit Next Patent Application: Micro flow rate generator, pump and pump system Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Diaphragm pump of constant pressure type patent info. IP-related news and info Results in 0.19288 seconds Other interesting Feshpatents.com categories: Canon USA , Celera Genomics , Cephalon, Inc. , Cingular Wireless , Clorox , Colgate-Palmolive , Corning , Cymer , 174 |
 * Protect your Inventions * US Patent Office filing 
PATENT INFO |
|
