Small ozone gas-water mixing pump
The present invention provides a small ozone gas-water mixing pump. The rotation of the leaves drives water to produce intense turbulence vortex, and the bubbles in the water are torn up producing more and smaller bubbles, so that the gas-water contacting area is enlarged, and the ozone is efficiently dissolved into water. The magnetic force between the permanent magnet A on impeller and the permanent magnet B on motor enables the motor driving the impeller without using shaft, so as to avoid sealing problems of the pump driving shaft. The present invention is simple in structure, low cost, safe, stable, and has high ozone dissolving efficiency, so that it is especially applicable to the household appliances, such as dish washers and washing machines, etc.
1. Field of Invention
The present invention relates to a gas-water mixing pump, and more particularly to a small gas-water mixing pump used for mixing ozone and water, wherein the motor has an output power less than 50 W.
2. Description of Related Arts
Ozone is an excellent chemical preparation, because it can instantly kill bacteria and viruses. It can also decompose harmful chemical pollutant without creating new pollutants. Therefore, the ozone has been widely applied to large scale water treatment equipment. The household appliances, such as dish washers and washing machines have been widely used, and need to be treated by ozone. However, ozone has not been practically applied to the household appliances. The main reason that ozone has not been applied to the household appliances is that small ozone gas-water mixing equipment, which is efficient, stable and low cost, is not available yet.
High ozone concentration in the air is harmful to human beings. Therefore, the dissolving efficiency of the ozone gas-water mixing equipment should be high, so as to limit the ozone concentration to environmental standards. The mixing pump has high dissolving efficiency, so it is adopted in industry. However, industrial mixing equipment is not applicable to household appliances.
SUMMARY OF THE PRESENT INVENTIONAn object of the present invention is to provide a small ozone gas-water mixing pump (having a motor output power less than 50 W), which is applicable to the household appliances, such as dish washers and washing machines, etc.
Another object of the present invention is to provide a small ozone gas-water mixing pump (having a motor output power less than 50 W), which is highly efficient, stable, reliable, small in size, and low cost.
The principle of the present invention is that the rotation of the leaves of the water pump produces intense turbulence vortex, and the bubbles in the water are torn up to produce more and smaller bubbles, so that the ozone is efficiently mixed with and dissolved into water. Accordingly, in order to accomplish the above object, the present invention provides a pump casing, an impeller, and a motor. A permanent magnet A is provided on the impeller. Outside of the pump casing, at a place corresponding to the permanent magnet A, a permanent magnet B is mounted on a device connected to the rotor of the motor, like a rotary plate connected with or integrated with the rotor. The motor drives the permanent magnet B to rotate. According to the character of magnetic poles, that is unlike poles attract and like poles repel, the permanent magnet B pushes the permanent magnet A to rotate through magnetic force, so as to drive the impeller to rotate synchronously. Thus, the motor drives impeller without shafting.
Ozone is strong oxidant, which can accelerate the aging of the sealing rubber, so that using rubber gasket to seal driving shaft for a water pump is not reliable, especially when there is ozone in water, and this problem has been existed for a long time. The ceramic seal ring widely adopted by the present water pump is more reliable than the rubber gasket, but has a complicated structure, costs a lot, and takes up more room; besides, it still partially uses rubber gasket. For tiny or small pump, shaft sealing produces higher frictional resistance, which consumes a large part of the motor output power. The frictional resistance of the same kind of product cannot be assured to be the same. In this case, the output power of the water pump of the same kind of product significantly varies. Therefore, for household appliance, the water pump with a driving shaft cannot be adopted.
The present invention uses magnetic force to drive impeller without using a driving shaft, so that the driving shaft sealing problems is avoided, and the maintenance work is easier. The driving structure using magnetic force is simple in structure. If the brushless DC motor is adopted, the permanent magnet B is mounted on the rotary plate of the motor rotor. This structure is safe, simple, and small, so as to be applied to the tiny or small pumps. Without using shaft, the coaxial precision demand between the impeller and the motor shaft is lowered, and the motor and the pump body is easily maintained and replaced. If the impeller is trapped or overloaded, the motor will not be trapped or overloaded, so as to avoid the burning damage of the motor.
These and other objectives, features, and advantages of the present invention will become apparent in the following detailed description, the accompanying drawings, and the appended claims.
Referring to
The mixing pump shown in
The ozone gas can be added into the water before infusing into the mixing pump (premixing), or the ozone conduit 8 can be inserted into the mixing pump directly. Usually the inserting position is at the water inlet, as shown in
In order to make the most of the attraction between the permanent magnets A and B, and produce effective moment to drive impeller to rotate, the N-S polar direction of the permanent magnets A and B is the direction of the axis of the motor and the impeller, as shown in
There are a variety of permanent magnets. The Nd—Fe—B is the best in terms of cost and magnetic intensity. Therefore, in the present invention, Nd—Fe—B is the first choice. The rotation of the permanent magnets A and B produce alternating magnetic field, especially between the permanent magnets A and the permanent magnets B. If the pump casing is made of metal, the alternating magnetic field produces electric eddy current, which has two major disadvantages. Firstly, electromagnetic field lowers the magnetic driving force between the permanent magnets A and B. Secondly, the electric eddy current produces heat and increases the load of the motor. Therefore, the pump casing, especially between the permanent magnets A and B, should be made of non-conductive and non-metal material. Plastic is easily shaped, low cost, and is capable of resisting oxidization and corrosion, so that the plastic completely meets the demand of the household appliance. In the present invention, plastic pump casing is the first choice.
Referring to
The vortex type of mixing pump shown in
One skilled in the art will understand that the embodiment of the present invention as shown in the drawings and described above is exemplary only and not intended to be limiting.
It will thus be seen that the objects of the present invention have been fully and effectively achieved. It embodiments have been shown and described for the purposes of illustrating the functional and structural principles of the present invention and is subject to change without departure from such principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims.
Claims
1. A ozone-water mixing pump having the motor output power less than 50 W, comprising a pump casing, an impeller, and a motor, wherein a permanent magnet A (4) is mounted on the impeller, outside of the pump casing, at a place corresponding to the permanent magnet A (4), a permanent magnet B (5) is mounted on a device connected with the rotor of the motor.
2. The ozone-water mixing pump, as recited in claim 1, wherein the mixing pump is vortex type.
3. The ozone-water mixing pump, as recited in claim 1, wherein N-S polar direction of the permanent magnets A and B is the axial direction of the motor and the impeller.
4. The ozone-water mixing pump, as recited in claim 1, wherein the adjacent permanent magnets A have opposite magnetic polarity.
5. The ozone-water mixing pump, as recited in claim 1, wherein the permanent magnets A and B are made of Nd—Fe—B.
6. The ozone-water mixing pump, as recited in claim 1, wherein the pump casing is made of plastic.
7. The ozone-water mixing pump, as recited in claim 1, wherein the permanent A (4) is imbedded in the impeller.
Type: Application
Filed: Aug 5, 2008
Publication Date: Mar 19, 2009
Inventor: Biao Qin (Shenzhen)
Application Number: 12/221,771
International Classification: F04B 17/03 (20060101);