Filter assembly for a reprocessor
First Claim
1. A method of operating a sterilizer having a chamber for receiving items to be sterilized, a fluid circulation system for circulating fluids through said chamber, means for generating a liquid sterilant from dry chemical reagents by mixing water therewith, and a water filtration system for filtering water entering said sterilizer, said filtration system including:
- a fluid feed line that is attached to said chamber, a directional valve disposed in said fluid feed line, a first filter element in said fluid feed line, for filtering fluids therethrough, said first filter element located between said directional valve and said chamber and downstream of said directional valve, a second filter element in said fluid feed line for filtering fluids flowing therethrough, said second filter element located between said first filter element and said chamber, a water line connected to said fluid feed line at an intersection located between said directional valve and said first filter element, and a bypass line connected to said fluid feed line to define a fluid path that bypasses said directional valve and said first and second filter elements, said method of operating comprising the steps of;
filling said sterilizer with water from a water source, by passing said water through said first and second filter elements;
generating a liquid sterilant by mixing water filtered by said first and second filter elements with said dry chemical reagents;
circulating said liquid sterilant through said fluid circulation system and said filtration system wherein a portion of said liquid sterilant is directed through said first and second filter elements, and a portion is directed through said bypass conduit;
draining said sterilizer after a predetermined exposure time;
passing water for rinsing from said water line through said first and second filter elements;
heating said water for rinsing after said water for rinsing has passed through said first and second filter elements; and
introducing said water for rinsing into said chamber.
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides a method of operating a reprocessor that has a chamber for receiving items to be sterilized. The reprocessor is filled with water that has passed through a first and a second filter element that both comprise a filtration system. A liquid sterilant is generated by mixing the water with dry chemical reagents. The liquid sterilant is circulated through a fluid circulation system and the filtration system wherein a portion of the liquid sterilant is directed through a bypass conduit and another portion is directed through the first and second filter elements. After a predetermined exposure time, the reprocessor is drained. Then the reprocessor is filled with water for rinsing that has passed through the first and the second filter elements. The water for rinsing is heated prior to being introduced into the reprocessor.
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Citations
41 Claims
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1. A method of operating a sterilizer having a chamber for receiving items to be sterilized, a fluid circulation system for circulating fluids through said chamber, means for generating a liquid sterilant from dry chemical reagents by mixing water therewith, and a water filtration system for filtering water entering said sterilizer, said filtration system including:
- a fluid feed line that is attached to said chamber, a directional valve disposed in said fluid feed line, a first filter element in said fluid feed line, for filtering fluids therethrough, said first filter element located between said directional valve and said chamber and downstream of said directional valve, a second filter element in said fluid feed line for filtering fluids flowing therethrough, said second filter element located between said first filter element and said chamber, a water line connected to said fluid feed line at an intersection located between said directional valve and said first filter element, and a bypass line connected to said fluid feed line to define a fluid path that bypasses said directional valve and said first and second filter elements, said method of operating comprising the steps of;
filling said sterilizer with water from a water source, by passing said water through said first and second filter elements;
generating a liquid sterilant by mixing water filtered by said first and second filter elements with said dry chemical reagents;
circulating said liquid sterilant through said fluid circulation system and said filtration system wherein a portion of said liquid sterilant is directed through said first and second filter elements, and a portion is directed through said bypass conduit;
draining said sterilizer after a predetermined exposure time;
passing water for rinsing from said water line through said first and second filter elements;
heating said water for rinsing after said water for rinsing has passed through said first and second filter elements; and
introducing said water for rinsing into said chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- a fluid feed line that is attached to said chamber, a directional valve disposed in said fluid feed line, a first filter element in said fluid feed line, for filtering fluids therethrough, said first filter element located between said directional valve and said chamber and downstream of said directional valve, a second filter element in said fluid feed line for filtering fluids flowing therethrough, said second filter element located between said first filter element and said chamber, a water line connected to said fluid feed line at an intersection located between said directional valve and said first filter element, and a bypass line connected to said fluid feed line to define a fluid path that bypasses said directional valve and said first and second filter elements, said method of operating comprising the steps of;
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8. A method of operating a reprocessor having a chamber for receiving items to be microbially deactivated, a fluid circulation system for circulating fluids through said chamber, means for generating a microbial deactivation fluid from dry chemical reagents by mixing water therewith, and a water filtration system for filtering water entering said reprocessor, said filtration system including:
- a fluid feed line connectable to a source of pressurized water, a first filter element and a second filter element in said fluid feed line, said second filter element disposed in said fluid feed line downstream from said first filter element, and a bypass line connected to said fluid feed line to define a fluid path that bypasses said first and second filter elements, said water filtration system being connected to said fluid circulation system, said method of operating comprising the steps of;
filling said reprocessor with water from a water source, by passing said water through said first and second filter elements;
generating a microbial deactivation fluid by mixing water filtered by said first and second filter elements with said dry chemical reagents;
circulating said microbial deactivation fluid through said fluid circulation system and said filtration system wherein a portion of said microbial deactivation fluid is directed through said fluid feed line and another portion is directed through said first filter element and said second filter element;
draining said reprocessor after a predetermined exposure time;
filling said reprocessor with water for rinsing, by passing said water for rinsing through said first and second filter elements; and
heating said water for rinsing prior to introduction of said water for rinsing into said chamber. - View Dependent Claims (9, 10, 11, 12, 13, 14)
- a fluid feed line connectable to a source of pressurized water, a first filter element and a second filter element in said fluid feed line, said second filter element disposed in said fluid feed line downstream from said first filter element, and a bypass line connected to said fluid feed line to define a fluid path that bypasses said first and second filter elements, said water filtration system being connected to said fluid circulation system, said method of operating comprising the steps of;
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15. A method of operating a reprocessor having a chamber for receiving items to be microbially deactivated, a fluid circulation system for circulating fluids through said chamber, means for generating a microbial deactivation fluid from dry chemical reagents by mixing water therewith, and a water filtration system for filtering water entering said reprocessor, said filtration system including:
- a fluid feed line connectable to a source of pressurized water, a first filter element and a second filter element in said fluid feed line, said second filter element being downstream from said first filter element, a heater being downstream of said first and said second filter elements and a bypass line connected to said fluid feed line to define a fluid path that bypasses said first and second filter elements and said heater, said water filtration system being connected to said fluid circulation system, said method of operating comprising the steps of;
filling said sterilizer with water from a water source, by passing said water through said first and second filter elements;
generating a liquid sterilant by mixing said filtered water with said dry chemical reagents;
circulating said liquid sterilant through said fluid circulation system and said filtration system wherein a portion of said liquid sterilant is directed through said fluid feed line and another portion is directed through said first filter element and said second filter element to produce filtered liquid sterilant; and
operating said heater during said circulating step. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
- a fluid feed line connectable to a source of pressurized water, a first filter element and a second filter element in said fluid feed line, said second filter element being downstream from said first filter element, a heater being downstream of said first and said second filter elements and a bypass line connected to said fluid feed line to define a fluid path that bypasses said first and second filter elements and said heater, said water filtration system being connected to said fluid circulation system, said method of operating comprising the steps of;
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24. In a reprocessor having a circulation system for circulating a liquid sterilant or microbial deactivation fluid through a chamber that forms a part of said circulation system, a water filtration system for filtering water used in said reprocessor, said water filtration system, comprising:
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a fluid feed line forming a portion of said circulation system, one end of said fluid feed line in fluid communication with said chamber;
a directional valve disposed in said fluid feed line;
a first filter element disposed in said fluid feed line for filtering fluids flowing therethrough, said first filter element located upstream from said chamber;
a second filter element disposed in said fluid feed line for filtering fluids flowing therethrough, said second filter element located between said first filter element and said chamber;
a water line connectable to a source of pressurized water, said water line connected to said fluid feed line at a location between said directional valve and said first filter element; and
a bypass line connected to said fluid feed line to define a fluid path that bypasses said first and second filter elements, said bypass line connected at one end to said fluid feed line upstream of said directional valve and connected at another end to said fluid feed line between said second filter element and said chamber. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32)
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33. A method of operating a sterilizer having a chamber for receiving items to be sterilized, a fluid circulation system for circulating fluids through said chamber, means for generating a liquid sterilant from dry chemical reagents by mixing water therewith, and a water filtration system for filtering water entering said sterilizer, said filtration system including:
- a fluid feed line that is attached to said chamber, a directional valve disposed in said fluid feed line, a first filter element disposed in said fluid feed line for filtering fluids therethrough, said first filter element located between said directional valve and said chamber and downstream of said directional valve, a second filter element disposed in said fluid feed line for filtering fluids flowing therethrough, said second filter element located between said first filter element and said chamber, a water line connected to said fluid feed line at an intersection located between said directional valve and said first filter element, and a bypass line connected to said fluid feed line to define a fluid path that bypasses said directional valve and said first and second filter elements, said method of operating comprising the steps of;
filling said sterilizer with water from a water source, by passing said water through said first and second filter elements;
generating a liquid sterilant by mixing water filtered by said first and second filter elements with said dry chemical reagents; and
circulating said liquid sterilant through said fluid circulation system and said filtration system wherein a portion of said liquid sterilant is directed through said first and second filter elements, and a portion is directed through said bypass conduit. - View Dependent Claims (34, 35, 36)
- a fluid feed line that is attached to said chamber, a directional valve disposed in said fluid feed line, a first filter element disposed in said fluid feed line for filtering fluids therethrough, said first filter element located between said directional valve and said chamber and downstream of said directional valve, a second filter element disposed in said fluid feed line for filtering fluids flowing therethrough, said second filter element located between said first filter element and said chamber, a water line connected to said fluid feed line at an intersection located between said directional valve and said first filter element, and a bypass line connected to said fluid feed line to define a fluid path that bypasses said directional valve and said first and second filter elements, said method of operating comprising the steps of;
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37. In a reprocessor having a chamber for receiving items to be microbially deactivated or sterilized, a fluid circulation system for circulating fluids through said chamber, means for generating a microbial deactivation fluid from dry chemical reagents by mixing water therewith, and a water filtration system for filtering water entering said reprocessor, said filtration system including:
- a fluid feed line connectable to a source of pressurized water, a first filter element and a second filter element in said fluid feed line, said second filter element being downstream from said first filter element, a method of checking the integrity of at least one of said filter elements, comprising the steps of;
a) establishing a first known pressure on the upstream side of said filter element;
b) allowing pressure on said upstream side of said filter element to dissipate through said filter element and through a leak orifice of known dimensions;
c) monitoring over time the change in pressure on the upstream side of said filter;
d) establishing a second known pressure on the upstream side of said filter element;
e) allowing pressure on said upstream side of said filter element to dissipate through said filter element;
f) monitoring over time the change in pressure on the upstream side of said filter; and
g) determining a flow rate through said filter based on the changes in pressure determined in steps c) and f). - View Dependent Claims (38, 39, 40, 41)
- a fluid feed line connectable to a source of pressurized water, a first filter element and a second filter element in said fluid feed line, said second filter element being downstream from said first filter element, a method of checking the integrity of at least one of said filter elements, comprising the steps of;
Specification