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  Wet and dry pumpRelated Patent Categories: Pumps, Motor Driven, Electric Or Magnetic Motor, Rotary Motor And Rotary Nonexpansible Chamber Pump, With Specific Motor DetailsThe Patent Description & Claims data below is from USPTO Patent Application 20060013712. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a wet and dry pump, and particularly, to a wet and dry pump capable of making wet air or liquid pass through a space between a stator and a rotor by processing a motor to be damp-proof. [0003] 2. Description of the Conventional Art [0004] As shown in FIGS. 1 and 2, a conventional wet and dry pump includes: a housing 110 provided with a cylindrical impeller cover 111 and a cylindrical motor cover 112; an impeller 120 rotatably installed in the impeller cover 112; a motor 140 installed in the motor cover 112 and connected to the impeller 120 and a rotating shaft 130, for providing a driving force to rotate the impeller 120; and a cooling fan 170 connected to the rotating shaft 130 and rotated by a rotation of the rotating shaft 130 and thereby sucking a cooling air into the motor cover 102 to discharge it. [0005] An inlet 113 for sucking fluid by an operation of the impeller 120 is formed at a central upper portion of the impeller cover 111, and a plurality of outlets 114 for discharging the fluid flowed in the impeller cover 111 is formed at a circumference of the impeller cover 111. [0006] A suction opening 115 for sucking cooling air by an operation of the cooling fan 170 is formed at a central lower portion of the motor cover 112, and a plurality of discharge openings 116 for discharging the air having performed a cooling operation to the outside are formed at a circumference of the motor cover 112. [0007] The motor 140 includes: a stator 141 of a ring shape fixed at an inner circumferential surface of the motor cover 112; and a cylindrical rotor 142 fixed at an outer circumference of the rotating shaft 130, maintaining a certain gap with an inner circumferential surface of the stator 141. According to this, the air sucked by the cooling fan 170 discharges to the outside a heat generated from the motor 140 when the air passes through the gap between the stator 141 and the rotor 142. [0008] A shielding wall 117 is installed between the impeller cover 111 and the motor cover 112. As a result, the fluid sucked by the impeller 120 can not be flowed in the motor cover 112 and the cooling air sucked by the cooling fan 170 can not be flowed in the impeller cover 111 as well. [0009] According to the aforementioned construction, when the motor 140 is operated, the impeller 120 is rotated by the rotation of the rotating shaft 130. As a result, fluid is flowed in the impeller cover 111 through the inlet 113 of the impeller cover 111 and discharged to the outside through the outlet 114. [0010] Additionally, once the cooling fan 170 is rotated by the rotation of the rotating shaft 130, the external air is sucked in the motor cover 112 through the suction opening 115 and cools the motor 140 while passing through the gap between the stator 141 and the rotor 142, thereafter being discharged to the outside through the discharge opening 116. [0011] In the aforementioned conventional wet and dry pump, since the shielding wall 117 for shielding a space between an inner space of the impeller cover 111 and an inner space of the motor cover 112 is installed therein, the fluid flowed in the impeller cover 111 is prevented from being flowed toward the motor 140 and thereby the conventional wet and dry pump can pump wet air or liquid. [0012] However, because the conventional wet and dry pump should have the cooling fan 170 for cooling the motor 140, power loss of approximately 60.about.70W is occurred, and noise of approximately 2.about.3 dB is disadvantageously increased thereby. SUMMARY OF THE INVENTION [0013] Therefore, an object of the present invention is to provide a wet and dry pump capable of improving a cooling efficiency of a motor by processing it to be damp-proof and thus by making wet air or liquid pass through a space between a stator and a rotor, and capable of improving characteristics of power consumption and noise by removing a separate cooling fan for cooling the motor. [0014] To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a wet and dry pump, comprising: a housing having an inlet and an outlet of fluid; an impeller rotatably disposed in the housing; and a motor including a rotating shaft connected to the impeller, a stator fixed to an inner circumferential surface of the housing and having a damp-proof-processed winding coil therein, and a rotor fixed to an outer circumference of the rotating shaft with maintaining a certain gap with an inner circumference of the stator. [0015] The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS [0016] The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. [0017] In the drawings: [0018] FIG. 1 is a front view showing a conventional wet and dry pump; [0019] FIG. 2 is a longitudinal sectional view showing the wet and dry pump shown in FIG. 1; [0020] FIG. 3 is a front view showing a wet and dry pump according to the present invention; [0021] FIG. 4 is a longitudinal sectional view showing the wet and dry pump shown in FIG. 3; Continue reading... Full patent description for Wet and dry pump Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Wet and dry pump 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 Wet and dry pump or other areas of interest. ### Previous Patent Application: Fuel pump Next Patent Application: Magnetic axleless liquid circulator Industry Class: Pumps ### FreshPatents.com Support Thank you for viewing the Wet and dry pump patent info. IP-related news and info Results in 3.55521 seconds Other interesting Feshpatents.com categories: Novartis , Pfizer , Philips , Polaroid , Procter & Gamble , |
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