Fluid sprinkling – spraying – and diffusing – Combining of separately supplied fluids – Including additional dispersing plate or obstruction in...
Reexamination Certificate
1999-03-24
2002-07-02
Morris, Lesley D. (Department: 3752)
Fluid sprinkling, spraying, and diffusing
Combining of separately supplied fluids
Including additional dispersing plate or obstruction in...
C239S451000, C239S453000, C239S456000, C239S499000, C239S524000, C239S491000, C222S145600, C366S175200
Reexamination Certificate
active
06412709
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a fluid mixing-jetting apparatus, a fluid mixer and a snowmaker.
2. Description of the Related Art
A conventional fluid mixing-jetting apparatus of one type comprises an apparatus body having an inlet arrangement for introducing plural kinds of compressed fluids into a flow passage formed in the apparatus body and a jet outlet provided on a center axis of the flow passage of the apparatus body for jetting a fluid mixture therethrough. However, there has been a problem that the high jet pressure is required for enhancing the mixing efficiency. Thus, the apparatus becomes large in size and requires the high operation power.
A conventional fluid mixer of one type comprises an apparatus body having an inlet arrangement for introducing plural kinds of compressed fluids into a flow passage formed in the apparatus body, an outlet for discharging a fluid mixture therethrough and a twist vane type static mixer provided in the flow passage between the inlet arrangement and the outlet. However, there has been a problem that
the static mixer causes a large pressure loss when the mixing efficiency is increased, and further that the mixing efficiency is still not satisfactory.
On the other hand, a snowmaker of a snow gun type which can efficiently produce snow even at a relatively high open air temperature has been demanded. A conventional snow gun type snowmaker comprises an apparatus body having an inlet arrangement for Introducing compressed air and water into a flow passage formed in the apparatus body, and a jet outlet provided on a center axis of the flow passage of the apparatus body for jetting an air-water mixture therethrough, wherein the inlet arrangement includes an ejector structure for jetting the air into the flow passage. Upon jetting of the air-water mixture, the pressure of the compressed air (about 7 Kg/cm
2
) is released so that a low temperature area of about −40° C. is obtained. Accordingly, the jetted waterdrops are frozen to be ice crystals through adiabatic cooling so that artificial snow is obtained.
However, the foregoing conventional snow gun type snowmaker requires a large amount of high-pressure compressed air and thus a large-size compressor with high power consumption, thereby leading to high costs.
SUMMARY OF THE INVENTION
Therefore, it is an object of the present invention to provide a fluid mixing-jetting apparatus which can improve the mixing efficiency thereof without increasing the jet pressure.
It is another object of the present Invention to provide a fluid mixer which can improve the mixing efficiency thereof without increasing a pressure loss caused at a static mixer.
It is another object of the present invention to provide a snowmaker which can easily and efficiently make artificial snow of excellent quality even at a relatively high open air temperature.
According to one aspect of the present invention, there is provided a fluid mixing-jetting apparatus comprising an apparatus body provided at its upstream end with an inlet arrangement for introducing plural kinds of fluids into a flow passage formed in the apparatus body; and an end plate closing a downstream end of the flow passage, the end plate formed with a jet opening at a position offset from a center axis of the flow passage.
It may be arranged that the end plate is further formed with a plurality of concave portions on an upstream surface thereof so as to form the upstream surface of the end plate as a non-planar surface.
It may be arranged that the jet opening is non-circular and continuous with an inner circumference of the apparatus body at the downstream end of the flow passage.
According to another aspect of the present invention, there is provided a fluid mixer comprising an apparatus body provided at its upstream end with an inlet arrangement for introducing plural kinds of fluids into a flow passage formed in the apparatus body; a static mixer provided in the flow passage downstream of the inlet arrangement; and a collision plate provided in the flow passage downstream of the static mixer, the collision plate having a non-circular ejection opening at an offset position thereof.
It may be arranged that the flow passage has a diameter-increased passage portion in which the static mixer is provided, the diameter-increased passage portion having a passage sectional area which is greater than that of the flow passage upstream of the diameter-increased passage portion.
It may be arranged that a downstream side of the collision plate is released.
It may be arranged that a downstream side of the collision plate has a diameter-increased passage portion whose diameter is greater than that of the flow passage downstream of the static mixer, the diameter-increased passage portion extending a given distance in a flow direction of the fluids.
It may be arranged that the static mixer comprises another collision plate disposed perpendicular to a flow direction of the fluids and a circumferential wall projecting in an upstream direction from a rim of the another collision plate.
According to another aspect of the present invention there is provided a fluid mixer comprising an apparatus body provided at its upstream end with an inlet arrangement for introducing plural kinds of fluids into a flow passage formed in the apparatus body; a static mixer provided in the flow passage, the static mixer comprising a collision plate disposed perpendicular to a flow direction of the fluids and a circumferential wall projecting in an upstream direction from a rim of the collision plate; and a fixing disk closing a space between an outer circumference of the static mixer and an inner circumference of the apparatus body defining the flow passage, the fixing disk having a non-circular ejection opening at an offset position thereof.
According to another aspect of the present invention, there is provided a fluid mixer comprising an apparatus body provided at its upstream end with an inlet arrangement for introducing plural kinds of fluids into a flow passage formed in the apparatus body; and a static mixer provided in the flow passage, the static mixer comprising a collision plate disposed perpendicular to a flow direction of the fluids and a circumferential wall projecting in an upstream direction from a rim of the collision plate, wherein the flow passage has a downstream passage portion whose diameter is smaller than that of the flow passage upstream of the downstream passage portion, the downstream passage portion having an upstream extended portion hermetically extended into the flow passage and hermetically closed at its upstream end by the collision plate, and wherein the upstream extended portion is formed with a non-circular ejection opening at the upstream end thereof.
According to another aspect of the present invention, there is provided a fluid mixer comprising an apparatus body provided at its upstream end with an inlet arrangement for introducing plural kinds of fluids into a flow passage formed in the apparatus body, the flow passage having a diameter-increased passage portion comprising a diameter-increasing step and a diameter-decreasing step; and a static mixer provided in the diameter-increased passage portion, the static mixer comprising a collision plate disposed perpendicular to a flow direction of the fluids and a circumferential wall projecting in an upstream direction from a rim of the collision plate, wherein at least one of an upstream end and a downstream end of the circumferential wall is located close to corresponding one of the diameter-increasing step and the diameter-decreasing step to provide a small gap therebetween.
According to another aspect of the present invention, there is provided a fluid mixer comprising an apparatus body provided at its upstream end with an inlet arrangement for introducing plural kinds of fluids into a flow passage formed in the apparatus body, the flow passage having a diameter-increased passage portion comprising a diameter-increasing step and a diameter-decre
Evans Robin O.
Morris Lesley D.
Shinyou Technologies Inc.
LandOfFree
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