EP2741637B1 - Mattress cover and method for controlling humidity therein - Google Patents
Mattress cover and method for controlling humidity therein Download PDFInfo
- Publication number
- EP2741637B1 EP2741637B1 EP13798712.9A EP13798712A EP2741637B1 EP 2741637 B1 EP2741637 B1 EP 2741637B1 EP 13798712 A EP13798712 A EP 13798712A EP 2741637 B1 EP2741637 B1 EP 2741637B1
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- European Patent Office
- Prior art keywords
- fluid
- humidity
- mattress
- mattress cover
- controller
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
- A47C31/007—Anti-mite, anti-allergen or anti-bacterial means
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C21/00—Attachments for beds, e.g. sheet holders, bed-cover holders; Ventilating, cooling or heating means in connection with bedsteads or mattresses
- A47C21/04—Devices for ventilating, cooling or heating
- A47C21/042—Devices for ventilating, cooling or heating for ventilating or cooling
- A47C21/044—Devices for ventilating, cooling or heating for ventilating or cooling with active means, e.g. by using air blowers or liquid pumps
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
- A47C31/005—Use of aromatic materials, e.g. herbs
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
- A47C31/10—Loose or removable furniture covers
- A47C31/105—Loose or removable furniture covers for mattresses
Description
- The invention relates to a mattress cover and a method for controlling a level of humidity within said mattress cover. In particular, the method provides humidity controlled fluid to a mattress cover in order to control infestation of dust mites, bed bugs and/or other parasites.
- The term "mattress cover" is used throughout this document. However, it will be understood that this term encompasses different types of removable bedding layers attachable onto or around a mattress in order to provide protection. For example, this term is to be understood to include mattress toppers, mattress protectors, mattress pads and the like.
- The term "dust mite" is used throughout this document. However, it will be understood that the invention also relates to other types of infesting parasite, such as bed bugs. The skilled person will therefore appreciate that the term "dust mite" encompasses other bed infesting parasites or bugs.
- Dust mites measure about 0.25 mm in length. Dust mites feed off of pet and human dander (dead skin cells), and their waste is a major cause of allergies and asthma. People often have more pronounced asthma symptoms at night, when they are laying in a bed infested with dust mites. Dust mites inhabit warm, humid areas filled with dust, which are conditions often found in mattresses, mattress covers, and bedding including pillows, sheets, blankets and duvets.
- The house dust mite survives in all climates, even at high altitude. House dust mites thrive in an indoor environment, particularly in bedrooms and kitchens. Dust mites survive well in mattresses, carpets, furniture and bedding, with figures around 188 mites per gram of dust Even in dry climates, house dust mites survive and reproduce easily in bedding (especially in pillows), extracting moisture from the humidity generated by human breathing, perspiration, and saliva.
- The average life cycle for a male house dust mite is in the order of 10 to 19 days. A mated female house dust mite can live up to 70 days, laying 60 to 100 eggs in the last 5 weeks of her life. In a 10 week life span, a house dust mite will produce approximately 2000 faecal particles and an even larger number of partially digested enzyme-covered dust particles, which may cause irritation, allergies and/or aggravation of asthma symptoms.
- A known technique for killing dust mites in bedding is disclosed in
GB 2334889 - Another mattress cover is shown in
EP 1645258 A1 . - In order to execute the above known method a bed must not be in use by an occupant. Further, a bed must be stripped of bedding in order to attach the fabric cover. In addition, enough room must be available to allow the fabric cover to inflate. The above method is also a one-off treatment of a bed and does not prevent infestation of a bed in between treatments.
- In accordance with the invention there is provided a mattress cover as claimed in claim 1.
- Optionally, the fluid permeable spacer material may comprise an open celled material, thereby allowing free fluid flow within its volume. The fluid permeable spacer material may be a 3-D spacer fabric.
- Optionally, the fluid permeable spacer material comprises upper and lower layers, each of a woven polyester material.
- Optionally, the fluid permeable spacer material comprises a fibrous material which is connected to the upper and lower layers.
- Optionally, the fibrous material comprises polyester microfilaments.
- De-humidified fluid may be supplied to the internal volume thereby allowing de-humidified fluid to pass through the fibrous material to prevent dust mite or other bug infestation.
- According to the invention, the distribution of fluid outlets is such that the spacing between adjacent outlets decreases with increasing distance from the fluid inlet.
- Optionally, the size of fluid outlets increases with increasing distance from the fluid inlet.
- Alternatively, the non-uniform pattern and/or non-uniform size of the fluid outlets distributed on the top layer is provided by fluid outlets being of a uniform pattern and/or being uniform in size, but wherein selected fluid outlets proximate the fluid inlet are individually blocked.
- Alternatively, the non-uniform pattern and/or non-uniform size of the fluid outlets distributed on the top layer is provided by fluid outlets being of a uniform pattern and/or being uniform in size, but wherein a non-porous ink is applied to the top layer in a halftone pattern to decrease the fluid outlet density proximate the fluid inlet.
- In accordance with a second embodiment of the invention there is provided a mattress cover according to the first aspect connected to a humidity temperature control input, the humidity controller comprising:
- a fluid humidity altering means in fluid communication with a first fluid outlet configured to allow fluid to pass from the humidity controller into the fluid inlet of the mattress cover;
- a fluid driving means operable to drive fluid from the fluid humidity altering means through the first fluid outlet; and
- a controller operable to measure a humidity level of a fluid within the mattress cover and control the operation of the fluid driving means and/or the fluid humidity altering means dependent on the measured humidity.
- The second embodiment of the invention aims to make the environment within the mattress cover, mattress and/or surrounding bedding unsuitable for habitation by dust mites or any other type of bug that may infest beds and/or bedding.
- The humidity controller may monitor a fluid, which may be a gas such as air, from within a mattress cover. It is therefore possible for the controller to maintain the humidity of a fluid within a mattress cover at a given humidity level by operating the fluid humidity altering means, which may be a de-humidifying means, and/or the fluid driving means dependent on the measured humidity.
- Optionally, the humidity controller further comprises a humidity control input configured to set a humidity threshold value, wherein the controller is configured to operate the fluid humidity altering means dependent on the measured humidity exceeding the humidity threshold value.
- By use of the humidity control input a user of the humidity controller is able to control the desired level of humidity of fluid within a mattress cover. The humidity controller is therefore able to control the humidity level within the mattress cover per se. A user is, for example, able to amend the desired level of humidity to target infestations by certain species of bug. Additionally, a user is able to amend the desired humidity of fluid within a mattress cover dependent on local environmental conditions.
- Optionally, the humidity threshold value may be in the range from 30% relative humidity to 70% relative humidity. Optionally, the humidity threshold value may be in the range from 40% relative humidity to 60% relative humidity. Optionally, the humidity threshold value may be in the range from 40% relative humidity to 50% relative humidity. The relative humidity may be determined at 1 atmosphere and 20 degrees Celsius.
- Dust mites do not drink but absorb moisture from the surrounding air. If the humidity is maintained within the ranges of the invention then dust mites may dehydrate and die. Additionally, the harsh environment may reduce the dust mites' urge to procreate so their numbers may be reduced in this way.
- Optionally, the humidity control input may be configured to set a humidity operating envelope comprising an upper threshold value and a lower threshold value. In such embodiments, the controller may be configured to operate the fluid humidity altering means in dependence on the measured humidity exceeding the upper threshold value and in dependence on the measured humidity falling below the lower threshold value to maintain the relative humidity within the mattress cover within the humidity operating envelope.
- Optionally, the humidity operating envelope may have a lower threshold value of 30% relative humidity and an upper threshold value of 70% relative humidity. Optionally, the humidity operating envelope may have a lower threshold value of 40% relative humidity and an upper threshold value of 60% relative humidity. Optionally, the humidity operating envelope may have a lower threshold value of 40% relative humidity and an upper threshold value of 50% relative humidity. The relative humidity may be determined at 1 atmosphere and 20 degrees Celsius.
- Optionally, the humidity controller further comprises a heater, and wherein the fluid driving means is further operable to drive fluid from the heater through the first fluid outlet; and wherein the controller is further operable to measure a temperature of fluid from within the mattress cover and control the operation of the fluid driving means and/or the de-humidifying means and/or the heater dependent on the measured temperature.
- The heater may provide an additional de-humidifying effect on fluid driven by the fluid driving means into a mattress cover. Additionally, increasing or decreasing temperature may provide conditions in which it is difficult for dust mites or other parasites to survive and/or breed.
- Optionally, the humidity controller further comprises a temperature control input configured to set a temperature threshold value, and wherein the controller is configured to operate of the fluid driving means and/or the de-humidifying means and/or the heater dependent on the measured temperature being less than the temperature threshold value.
- By use of the temperature control input a user of the humidity controller is able to control the desired level of temperature of fluid within a mattress cover. A user is, for example, able to set the desired temperature to target infestations by certain species of dust mite or other bug. Additionally, a user is able to set the desired temperature of fluid within a mattress cover dependent on local environmental conditions.
- Optionally, the temperature threshold value may be in the range from 15 degrees Celsius to 30 degrees Celsius. Optionally, the temperature threshold value may range from 20 to 25 degrees Celsius.
- Optionally, the temperature control input may be configured to set a temperature operating envelope comprising an upper threshold value and a lower threshold value. In such embodiments, the controller may be configured to operate the heater means in dependence on the measured temperature exceeding the upper threshold value and in dependence on the measured temperature falling below the lower threshold value to maintain the temperature within the mattress cover within the temperature operating envelope. In such embodiments the heater may be operable to heat the fluid and/or cool the fluid.
- Optionally, the temperature operating envelope may have a lower threshold value of 15 degrees Celsius and an upper threshold value of 30 degrees Celsius. Optionally, the temperature operating envelope may have a lower threshold value of 20 degrees Celsius and an upper threshold value of 25 degrees Celsius.
- Optionally, the fluid driving means of the humidity controller comprises a centrifugal impeller pump.
- In accordance with a third embodiment of the invention there is provided a method for controlling a humidity level of a fluid within a mattress cover according to the second embodiment of the invention comprising:
- measuring the humidity of a fluid from within the mattress cover;
- operating a fluid humidity altering means to alter the humidity of the fluid; and
- operating a fluid driving means operable to drive humidity altered fluid from the fluid humidity altering means into the mattress cover wherein the operation of the fluid humidity altering means and the fluid driving means is dependent on the measured humidity of the fluid.
- Optionally, the fluid driving means and/or the fluid humidity altering means may be operated to maintain the humidity of fluid from within the mattress cover at a constant humidity.
- Optionally, a herbal aroma is introduced into the mattress cover by the fluid driving means.
- The invention will now be described with reference to some of the accompanying drawings, in which:
-
Figure 1a is a perspective view of a mattress humidity controller; -
Figure 1b is a perspective view of a mattress humidity controller; -
Figure 1c is a block schematic diagram of a mattress humidity controller; -
Figure 2 is a flow diagram showing a method of maintaining a humidity level of fluid from within a mattress; -
Figure 3a is perspective view of a mattress comprising a mattress humidity controller; -
Figure 3b is a sectional view along A-A through the mattress ofFigure 3a ; -
Figure 4a is a perspective view of a mattress for use with the mattress humidity controller ofFigs 1a and 1b ; -
Figure 4b is a perspective view of a section of the top of the mattress ofFigure 4a showing the top layer of the mattress partially cut away; -
Figure 5 shows a representation of the likelihood of the occurrence of different phenomena within a mattress against relative humidity within a mattress; -
Figure 6 is a perspective view of a mattress cover according to the present invention; -
Figure 7 is a perspective view of the 3-D spacer fabric detail of the mattress cover ofFigure 6 ; -
Figure 8 is a diagrammatic view of the air flow within the mattress cover ofFigure 6 when laden with a user; and -
Figure 9 is a diagrammatic view of an optional printing design for the mattress cover ofFigure 6 . - A mattress humidity controller is disclosed in the applicant's prior international publication No.
WO2013/017869 . The humidity controller disclosed therein is able to monitor a fluid from within a mattress and operate to inject fluid into the mattress to raise or lower the humidity level of the fluid therein. In this way the mattress humidity controller is able to maintain the humidity level of a fluid within a mattress at a desired level. This provides the advantage that dust mite and other bug infestations are prevented. It will be appreciated by the skilled addressee that the disclosure ofWO2013/017869 may be applied to or included within the apparatus and method of the present invention; or may assist with its comprehension. Accordingly, parts of that disclosure which relate toFigs. 1 to 5 are reproduced below. - The applicant's previous invention generally defines a mattress arranged to receive fluid from a mattress humidity controller. Further, the invention generally defines a mattress comprising the mattress humidity controller. Further still the invention generally defines a method for maintaining a humidity level of a fluid within a mattress.
- In some embodiments of the invention the fluid may comprise air. Air may be preferable for use as a fluid in the invention as it is easy to obtain from the surrounding environment.
- Referring to
Figure 1a , there is shown a rear left perspective view of amattress humidity controller 110. - The
mattress humidity controller 110 includes a fluid humidity altering means 112. The fluid humidity altering means may be operable to raise or lower the humidity of air. The fluid humidity altering means 112 may, for example, be a de-humidifier, a re-humidifier or both. - In exemplary embodiments, the fluid humidity altering means 112 may be a de-humidifier using a compressor to remove moisture from air. In further embodiments, the fluid humidity altering means 112 may be a de humidifier using a desiccant or salt based method of removing moisture from air. In yet further embodiments, the fluid humidity altering means 112 may be a de-humidifier using Peltier coolers to remove moisture from air.
- A first
fluid outlet 114 is in fluid communication with the fluid humidity altering means 112 to allow air to pass from the fluid humidity altering means 112 through the first fluid outlet 14 and into a mattress (seeFigure 3a ). - A
heater 116 is disposed in the firstfluid outlet 114. Theheater 116 may be operated to heat air passing through the firstfluid outlet 114 as it enters a mattress. Theheater 116 comprises an electrical heater element through which electrical current is passed to heat an element. In other exemplary embodiments theheater 116 may be another form of heater such as a gas powered heater or a ceramic heater. - The
heater 116 is positioned at the firstfluid outlet 114. This may be preferable as it minimises the amount of heat loss before the air passes through the firstfluid outlet 114 and into a mattress. However, in other exemplary embodiments theheater 116 may be positioned at a different location, for example at any point between the fluid humidity altering means 112 and the firstfluid outlet 114 or at any other location within the closed loop fluid system referred to below. - A fluid driving means 118 is operable to drive air from the fluid humidity altering means 112 out through the first
fluid outlet 114 and into a mattress. Thefluid driver 118 may for example be a pump, although in other exemplary embodiments the fluid driver may be a fan or other means for transferring fluid from one location to another. - A first
pump outlet pipe 120 is connected between the pump and the fluid humidity altering means 112. - A section of
ducting 122 extends from the fluid humidity altering means 112 to afluid inlet 124. Thefluid inlet 124 is in fluid communication with the fluid humidity altering means 112 and receives air from within a mattress. The length ofducting 122 is straight and extends away from the fluid humidity altering means 112 to a length sufficient to allow the firstfluid outlet 114 and thefluid inlet 124 to be positioned at separate locations. Advantageously the firstfluid outlet 114 and thefluid inlet 124 are positioned at opposite ends of a mattress. In alternative exemplary embodiments the length ofducting 122 may be any shape or length. In this way, the length of ducting may be configured to allow thefluid inlet 124 to be positioned to accommodate different sizes of mattress. In other alternative embodiments the length ofducting 122 may be configured to allow thefluid inlet 124 to be positioned at any location with respect to a mattress. - A
second fluid outlet 126 extends from thepump 118. The secondfluid outlet 126 is arranged to allow air from the fluid humidity altering means 112 to exit into a mattress. Accordingly, thepump 118 is configured to drive air from the fluid humidity altering means 112 out through the first fluid outlet 14 and the secondfluid outlet 126. - In the embodiment shown in
Figures 1a and 1b theheater 116 is positioned such that air driven from thepump 118 only passes theheater 116 when exiting themattress humidity controller 110 through the firstfluid outlet 114. In alternative embodiments theheater 116 may be positioned such that air driven from thepump 118 is heated by theheater 116 before it exits themattress humidity controller 110 through both the firstfluid outlet 114 and the secondfluid outlet 126. - A
water tank 128 is connected to the fluid humidity altering means 112. Thewater tank 128 may be configured to receive moisture extracted from air passing through the fluid humidity altering means 112 if the fluid humidity altering means 112 comprises a de-humidifier. Thewater tank 128 may be configured to provide a source of moisture if the fluid humidity altering means 112 comprises a re-humidifier. - Referring to
Figure 1b there is shown a rear right perspective view of amattress humidity controller 110. Features of themattress humidity controller 110 that are the same as themattress humidity controller 110 shown inFigure 1a are given the same reference numeral. - A
humidity control input 130 is positioned on the side of theducting 122. Thehumidity control input 130 is configured to allow a humidity threshold value to be set by a user of themattress humidity controller 110. Thehumidity control input 130 may be a knob that may be turned to a predetermined calibrated position to set the level of humidity of air corresponding to the humidity threshold value. In other exemplary embodiments thehumidity input controller 130 may be a digital input means comprising a keypad and a display, wherein the keypad is operable to enter a humidity threshold value. In yet further exemplary embodiments a humidity threshold value may be predetermined and stored within a controller (shown inFigure 2 ) of themattress humidity controller 110. - In embodiments the humidity threshold value may be in the range from 30% to 70% relative humidity. In other embodiments the humidity threshold value may be in the range from 40% to 60% relative humidity. In other embodiments the humidity threshold value may be in the range from 40% to 50% relative humidity.
- A
temperature control input 132 is positioned on the side of theducting 122. Thetemperature control input 132 is configured to allow a temperature threshold value to be set by a user of themattress humidity controller 110. Thetemperature control input 132 may be a knob that may be turned to a predetermined calibrated position to set the level of temperature of air corresponding to the temperature threshold value. In other exemplary embodiments thetemperature input controller 132 may be a digital input means comprising a keypad and a display, wherein the keypad is operable to enter a temperature threshold value. In yet further exemplary embodiments a temperature threshold value may be predetermined and stored within a controller (shown inFigure 2 ) of themattress humidity controller 110. - In embodiments the temperature threshold value may be in the range from 15 to 30 degrees Celsius. In other embodiments the temperature threshold value may be in the range from 20 to 25 degrees Celsius.
- Referring to
Figure 1c there is shown a block schematic diagram of amattress humidity controller 110. Features of themattress humidity controller 110 that are the same as themattress humidity controller 110 shown inFigures 1a and 1b are given the same reference numeral. - A fluid humidity altering means 112 is in fluid communication with a first
fluid outlet 114 and a secondfluid outlet 126. The fluid humidity altering means 112 is also in fluid communication with afluid inlet 124 viaducting 122. - A
pump 118 is configured to drive air from the fluid humidity altering means 112 out of the firstfluid outlet 114 and out of the secondfluid outlet 126. - A
heater 116 is positioned at the firstfluid outlet 114 to heat air leaving the firstfluid outlet 114. - A
controller 134 comprises asensor 136 and amicroprocessor 138. Thesensor 136 is connected to theducting 122 to allow air within theducting 122 to be sensed by thesensor 136. In certain embodiments it is preferable to place thesensor 136 as close to thefluid inlet 124 as possible as this results in the sensed air corresponding as closely as possible to the air inside a mattress. Thesensor 136 is configured to communicate sensed humidity and temperature to themicroprocessor 138. - The
microprocessor 138 is configured to communicate with ahumidity control input 130 and atemperature control input 132 to receive a humidity threshold value and a temperature threshold value respectively. Themicroprocessor 138 is further configured to communicate with the fluid humidity altering means 112 to operate the fluid humidity altering means 112. Themicroprocessor 138 is further configured to communicate with theheater 116 to operate theheater 116. Themicroprocessor 138 is further configured to communicate with thepump 118 to operate theheater 118. - Referring to
Figure 2 in combination withFigure 1c , operation of an exemplary embodiment is described. - The air from within a mattress is measured at
step 210. The air enters thefluid inlet 124 from a mattress and is indicative of the air within the mattress. The air from within the mattress is sensed by thesensor 136 to determine the humidity of the air. The humidity value of the air from within the mattress is communicated to themicroprocessor 138 from thesensor 136. Also, the humidity threshold value is communicated to themicroprocessor 138 from thetemperature input control 130. - At
step 212, themicroprocessor 138 reads the humidity threshold value from thehumidity control input 130, which has been set by a user. - The microprocessor compares the sensed humidity with the humidity threshold value at
step 214 to see if the humidity off the air within the mattress is greater than the humidity threshold value. - If the measured humidity of the air from within the mattress is not greater than the humidity threshold value then the microprocessor communicates with the fluid humidity altering means 112 to turn it off at
step 216. If the fluid humidity altering means 112 is already turned off then this step may not be necessary. Themicroprocessor 138 then communicates with thepump 118 to turn it off atstep 218. This step also may not be necessary if thepump 118 is already turned off. The above steps starting withstep 210 are repeated to measure the air from within the mattress again. - If the measured humidity of the air from within the mattress is greater than the humidity threshold value then the
microprocessor 138 communicates with the fluid humidity altering means 112 to turn it on to reduce the humidity of the air atstep 220. Themicroprocessor 138 also communicates withpump 118 to operate thepump 118 to drive air from the fluid humidity altering means 112 out of the firstfluid outlet 114 atstep 222. The above steps starting withstep 210 are repeated to measure the air from within the mattress again. - The
pump 118 may also be operated to drive air from the fluid humidity altering means out of the second fluid outlet and this operation is discussed in detail below. - The air that is driven out of the first
fluid outlet 114 enters the mattress reducing the humidity of the air within the mattress and thereby creating conditions within the mattress that are unfavourable for the existence of dust mites and other organisms capable of infesting a bed. - In an alternative embodiment, instead of returning to step 210 the method may continue to assess the temperature of the air from within the mattress against the temperature threshold value. In a similar fashion to that described above in respect of humidity, the
microprocessor 138 may read the temperature threshold value from thetemperature control input 132. Themicroprocessor 138 may then compare the temperature threshold value to the sensed temperature of the air from within the mattress. If the measured temperature is greater than the temperature threshold value then the microprocessor may turn off theheater 116 and thepump 118. If the measured temperature of the air from within the mattress is less than the temperature threshold value then themicroprocessor 138 may turn on theheater 116 and thepump 118. - The humidity and the temperature of the air within a mattress may be subsequently controlled. After both the humidity and the temperature have been controlled in this way then the method may return to step 210 to measure the humidity and temperature of the air from within the mattress.
- In certain embodiments the heater may be controlled to operate when the
mattress humidity controller 110 is first switched on and/or when the sensed temperature falls below 20 degrees Celsius and the humidity altering means 112 is operating. - In other alternative embodiments an additional step of turning on or off a
heater 116 may be added. Theheater 116 may supplement the de-humidifying capabilities of the fluid humidity altering means 112 by drying the air as it passes theheater 116. For example, if the humidity level of the air from within the mattress is greater than the humidity threshold value then after thestep 220 of turning on the fluid humidity altering means 112 an additional step of turning on theheater 116 may be undertaken. Conversely, if the sensed humidity of the air from within the mattress is less than or equal to the humidity threshold value then the additional step of turning off theheater 116 may also be undertaken. - Referring to
Figures 3a and3b there is shown amattress 300 comprising amattress humidity controller 110 as described above. - The
mattress humidity controller 110 is fitted to the underside of themattress 300. The mattress comprises a firstinternal volume 302. The firstinternal volume 302 has a firstmattress fluid inlet 304 configured to receive air from themattress humidity controller 110. Themattress humidity controller 110 is fitted to the base of themattress 300 such that the firstfluid outlet 114 of themattress humidity controller 110 is inserted into the firstmattress fluid inlet 304 of themattress 300. - The first
internal volume 302 of themattress 300 further comprises a firstmattress fluid outlet 306 configured to provide fluid from within themattress 300 to thefluid inlet 124 of themattress humidity controller 110. Accordingly, theducting 122 of themattress humidity controller 110 runs down the length of themattress 300 to align thefluid inlet 124 of themattress humidity controller 110 with the first mattress fluid outlet. Air from within the firstinternal volume 302 of themattress 300 thereby enters theducting 122 of themattress humidity controller 110. - The mattress may be of an open spring or a pocket spring construction. Both of these mattress constructions are known to the skilled person. Referring to
Figure 3b , the firstinternal volume 302 of themattress 300 contains pocket springs 308. The pocket springs 308 are shown only in the left area of the firstinternal volume 302. However, it will be understood that the pocket springs 308 will fill the firstinternal volume 302 as is normal practice in mattress design. - The
mattress 300 further comprises a secondinternal volume 310. The secondinternal volume 310 receives air from the secondfluid outlet 126 of themattress humidity controller 110 through a secondmattress fluid inlet 311. The secondinternal volume 310 is arranged at the top of themattress 300 nearest to a surface of the mattress on which bedding is placed. The top surface of themattress 300 therefore forms an outer wall of the secondinternal volume 310. - The top surface of the
mattress 300 comprises a plurality of secondmattress fluid outlets 312. The plurality of secondmattress fluid outlets 312 are small holes that are configured to generate high pressure jets of air from the secondinternal volume 310 into bedding arranged on the top surface of themattress 300. - The plurality of second
fluid outlets 312 may have a diameter in the range from 0.3 mm to 0.7 mm. In a particular embodiment the plurality of secondfluid outlets 312 may have a diameter of 0.5 mm. Further, the plurality of secondfluid outlets 312 may be spaced apart by a distance from 15 mm to 25 mm. In a particular embodiment, the plurality of secondfluid outlets 312 may be spaced apart by a distance of 20 mm. - The first
internal volume 302 and the secondinternal volume 310 are separated from each other byinternal wall 314. The firstinternal volume 302 and the secondinternal volume 310 are therefore separate from each other and air entering the firstinternal volume 302 cannot enter the secondinternal volume 310 through theinternal wall 314. Accordingly theinternal wall 314 may be manufactured from a material not permeable by air. - In operation air is pumped into the
mattress 300 by thepump 118 of themattress humidity controller 110. Air is pumped through firstfluid outlet 114 of themattress humidity controller 110 and the firstmattress fluid inlet 304 and into the firstinternal volume 302. The air passes through the firstinternal volume 302 to control the humidity of air within themattress 300. Air is able to pass through the firstinternal volume 302 as the construction of themattress 300 within the firstinternal volume 302, e.g. the open or pocket spring design, is entirely permeable by air. The outer walls of the firstinternal volume 302 are permeable to air. However, only a limited amount of air is able to exit themattress 300 through the outer walls of the firstinternal volume 302 because the material of the outer walls of the first internal volume provides resistance to the passage of air. The majority of air is therefore forced through the firstinternal volume 302 and out of the firstmattress fluid outlet 306 and back into themattress humidity controller 110 by air pressure generated by thepump 118. In this way, themattress 300 and themattress humidity controller 110 form a closed loop. That is conditioned air is pumped from themattress humidity controller 110 into the mattress 330, where it passes through the firstinternal volume 302 and out of the firstmattress fluid outlet 306 back into themattress humidity controller 110 before being conditioned and sent back to themattress 300. In this way additional moisture from, for example, perspiration of a user lying on themattress 300 may be quickly removed. - Air that is conditioned to maintain a desired humidity of the air within the
mattress 300 may be fed into the firstinternal volume 302 to control dust mite infestation. - As explained above, the process of pumping air into the first
internal volume 302 is controlled by the microprocessor 138 (shown inFigure 1c ) based on at least a humidity threshold value that may be set by a user. Themicroprocessor 138 controls whether air that is de-humidified or re-humidified is pumped into the firstinternal volume 302 to maintain the air within the firstinternal volume 302 at the humidity threshold value. - Air is also pumped through the second
fluid outlet 126 through the secondmattress fluid inlet 311 and into the second internal volume310. In some embodiments the walls of the secondinternal volume 310 are not permeable by air and so air pressure within the secondinternal volume 310 is increased by air being pumped into the secondinternal volume 310 from themattress humidity controller 110. In other embodiments the walls of the secondinternal volume 310 are permeable by air. In such embodiments thepump 118 is configured to input air into the secondinternal volume 310 at a rate greater than the rate at which air escapes through the walls of the secondinternal volume 310, thereby increasing the air pressure within the secondinternal volume 310. - The
pump 118, the plurality secondmattress fluid outlets 312 and the size of the secondinternal volume 310 are configured to generate a pressure within the secondinternal volume 310 sufficient to drive air out of the plurality of secondfluid outlets 312. Air is forced out of the plurality secondmattress fluid outlets 312 under pressure in jets of air. The jets of air are able to permeate bedding arranged on the top surface of themattress 300 to prevent infestations of dust mites and other infesting parasites within the bedding. - The supply of air to the second
internal volume 310 may also be controlled by themicroprocessor 138. Themicroprocessor 138 may control the air pumped into the secondinternal volume 310 on a timer basis. For example, after a user has woken and left a bed, the user may initiate a process of pumping air into the secondinternal volume 310, e.g. by pressing a button on the outside of themattress humidity controller 110. After initiation of the process of pumping air into the secondinternal volume 310, the microprocessor may activate the humidity altering means 112 and thepump 118 to pump air of a predetermined humidity into the secondinternal volume 310 of themattress 300. The level of humidity required may be set, for example, to be the same as the humidity threshold value discussed above. The microprocessor may then control the humidity altering means 112 and thepump 118 to pump conditioned air into the secondinternal volume 310 for a predetermined length of time. The predetermined length of time may be calculated to prevent infestation of dust mites within the bedding. - In certain embodiments, the
pump 118 may be operated after a user of themattress 300 has awoken and/or left a bed in which themattress 300 is installed. Thepump 118 may be configured to run for a fixed period of time. The fixed period of time may be from 30 minutes to 3 hours. In particular embodiments, the fixed period of time may be 1 hour or 2 hours. Alternatively, thepump 118 may be configured to operate continuously. - Referring to
Figures 4a and 4b , amattress 400 is shown in which the second internal volume comprises a length oftubing 402. The length oftubing 402 may be arranged between anouter covering 404 of themattress 400 and afoam layer 406 of themattress 400. The length oftubing 402 may be substantially flat so as not to interfere with the comfort of a user lying on themattress 400. As such the height of the length oftubing 402 should be minimised. In certain embodiments, the length oftubing 402 may be a pipe having an internal diameter in the range 3 mm to 7 mm. In a particular embodiment, the length of tubing may be a pipe having an internal diameter of 5 mm. - The length of
tubing 402 comprises a plurality of straight portions arranged in parallel lines. Each pair of the plurality of straight portions is connected at one end by a curved portion. This provides a serpentine, wave-like or zigzag shaped pathway. The length of tubing therefore 402 comprises an enclosed second internal volume. An upper surface of the length oftubing 402 comprises a plurality of secondmattress fluid outlets 408 arranged to expel jets of air as explained above. In this embodiment the outer surface of themattress 400 is permeable to air and so the jets of air expelled from the length oftubing 402 are able to penetrate through the surface of themattress 400 and into bedding arranged on the surface of themattress 400. - The length of
tubing 402 may be manufactured from polyvinyl chloride (PVC). PVC is a pliable material that will absorb any pressure exerted on it by the weight of a user lying on themattress 400 therefore not causing any discomfort. Further, PVC is not permeable by air and therefore allows air pressure within the length oftubing 402 to build up under pressure exerted by thepump 118. - Referring to
figure 5 , there is shown a plot of the likelihood of a range of phenomena occurring within a mattress against relative humidity within the mattress. The triangular portions shown in each row of the plot represent the likelihood of the phenomena of that row occurring. Taking "Bacteria" as an example, the best conditions for Bacteria occur at 0% relative humidity and conditions become less favourable for Bacteria as the relative humidity increases. Above 30% relative humidity the conditions for Bacteria are bad enough that the likelihood of occurrence of Bacteria is minimal. Similarly, dust mites only occur at a relative humidity of 50% or more. The shaded area between 40% and 60% relative humidity covering all rows represents an exemplary humidity operating envelope. The fluid humidity altering means is able to operate as a de-humidifier. If the measured relative humidity of air exiting a mattress exceeds a humidity threshold value then the de-humidifier is turned on to reduce the humidity of the air within the mattress. - In other embodiments, the fluid humidity altering means may operate as a de-humidifier and a re-humidifier. In such embodiments the humidity operating envelope has an upper threshold and a lower threshold. If the measured relative humidity of air exiting a mattress falls below the lower threshold value then the fluid humidity altering means operates as a re-humidifier and if the measured relative humidity of air exiting a mattress exceeds the upper threshold value then the fluid humidity altering means operates as a de-humidifier. The relative humidity of a fluid within the mattress is thereby maintained within the humidity operating envelope.
- Embodiments of the present invention are depicted in
figures 6 to 9 .Mattress cover 500 comprises a 3-Dspacer fabric layer 502 of approximately 20mm thickness. 3-D spacer fabrics comprise spaced apart upper and lower layers made from a woven polyester material, connected by polyester microfilaments. In contrast to polyurethane-type foams typically used in mattress and mattress cover applications, which tend to have a closed cell formation that impede fluid flow within the mattress or mattress cover, the 3-D spacer fabric allows fluid to easily flow within it. - The
layer 502 may be sealed around its edges with a suitable fabric. It will be understood that by "sealed" it need not be fully airtight, merely able to impede airflow. Cotton without additional perforations, for example, may be adequate to "seal" themattress cover 500 in the manner required. On one side of the mattress cover 500 a section is left open to act as afluid inlet 504. Thefluid inlet 504 may include a semi-rigid or rigid port or framework surrounding it and maintaining a suitable aperture in thefluid inlet 504. - The top surface of the
mattress cover 500 containsfluid outlets 512. These act much as thefluid outlets 312 previously described. A pump unit (not shown) is attached to themattress cover 500 via thefluid inlet 504. The pump unit is ideally of a centrifugal impeller type. It will be appreciated by the skilled addressee that a centrifugal impeller type pump, being designed to create an appreciable increase in air pressure rather than flow-rate is suitable for the present application. - The pump unit may incorporate or may be channelled through a fluid humidity altering means as described above. Moreover, there may be provided controller and timing systems as described above to enable selective operation of the system at the user's convenience. It will be appreciated by the skilled addressee that features described above in relation to the prior invention of
Figs. 1 to 5 may be equally applied to or included within embodiments of the present invention. - Since the
fabric layer 502 is an open celled configuration, air pumped into themattress cover 500 will freely circulate without the requirement for a fluid pathway to be created by way of tubing or the like. This may relieve any drawback that may be associated with such systems. For example, the elimination of tubing or other fluid pathway means that a far thinner mattress cover may be used, rather than having to embed the system within a thicker mattress. Moreover, since no tubing or other such rigid or semi-rigid fluid pathway is embedded within themattress cover 500, the user will not feel any discomfort associated with it. A herbal aroma may be incorporated into the airflow.Figure 8 depicts a user U lying upon themattress cover 500 with the fluid flow passing through themattress cover 500. - It has also been found that since the pressure supplied from the pump will tend to be at its greatest in the immediate vicinity of the
fluid inlet 504, a greater proportion of air flow out of themattress cover 500 through thefluid outlets 512 on the top surface of themattress cover 500 will tend to be in thosefluid outlets 512 in the immediate vicinity of thefluid inlet 504. To mitigate this undesirable situation and to achieve a more uniform fluid outflow fromfluid outlets 512, a proportion of the 512 fluid outlets in the vicinity of thefluid inlet 504 may either be blocked, or may simply be formed in a non-uniform pattern on the top surface of themattress cover 500. For example, if themattress cover 500 has an averagefluid outlet 512 density of 10 per square metre, the density localised to thefluid inlet 504 may be reduced to 4 per square metre to mitigate this tendency. - An alternative method for mitigating this tendency is shown in
Figure 9. Figure 9 depicts a vector half tone printing of non-porous ink onto themattress cover 500 top surface. This printing would be localised around thefluid inlet 504 and would selectively blockfluid outlets 512 nearest the fluid inlet. This would allow the entire surface to be formed with a uniform fluid outlet density and then printed to selectively blockfluid outlets 512. This may mitigate manufacturing complexity associated with either selectively blockingindividual fluid outlets 512 or by forming the mattress cover with discrete areas of varying fluid outlet density.
Claims (16)
- A mattress cover (500) comprising:(i) a base layer;(ii) a top layer; and(iii) an internal volume defined between the respective base and top layers;
wherein the internal volume contains a fluid permeable spacer material (502), and the base and top layers are connected around the perimeter of the internal volume; a fluid inlet (504) being provided in the mattress cover to allow a driven fluid to enter the internal volume and move through the fluid permeable spacer material (502); and wherein a plurality of fluid outlets (512) are provided in the top layer to allow a driven fluid introduced via the fluid inlet (504) to escape from the mattress cover; wherein the fluid outlets (512) are distributed on the top layer in a non-uniform pattern and/or are non-uniform in size; and characterised in that the distribution of fluid outlets (512) is such that the spacing between adjacent outlets decreases with increasing distance from the fluid inlet (504). - A mattress cover according to claim 1, wherein the fluid permeable spacer material (502) comprises spaced upper and lower layers, each of a woven polyester material.
- A mattress cover according to claim 2, wherein the fluid permeable spacer material (502) comprises a fibrous material which is connected to the spaced upper and lower layers.
- A mattress cover according to claim 3, wherein the fibrous material comprises polyester microfilaments.
- A mattress cover according to any preceding claim, wherein the size of fluid outlets (512) increases with increasing distance from the fluid inlet (504).
- A mattress cover according to any of claims 1 to 4, wherein the fluid outlets (512) are distributed on the top layer in a uniform pattern and/or are uniform in size, and wherein selected fluid outlets proximate the fluid inlet (504) are individually blocked.
- A mattress cover according to any of claims 1 to 4, wherein the fluid outlets (512) are distributed on the top layer in a uniform pattern and/or are uniform in size, and wherein a non-porous ink is applied to the top layer in a halftone pattern to decrease the fluid outlet density proximate the fluid inlet (504).
- A mattress cover (500) according to any preceding claim connected to a humidity controller (110), the humidity controller comprising:a fluid humidity altering means (112) in fluid communication with a first fluid outlet (114) configured to allow fluid to pass from the humidity controller into the fluid inlet (304) of the mattress cover;a fluid driving means (118) operable to drive fluid from the fluid humidity altering means (112) through the first fluid outlet (114); anda controller (134) operable to measure a humidity level of a fluid within the mattress cover (500) and control the operation of the fluid driving means (118) and/or the fluid humidity altering means (112) dependent on the measured humidity.
- A mattress cover according to claim 8, wherein the humidity controller (110) further comprises a humidity control input (130) configured to set a humidity threshold value, wherein the controller is configured to operate the fluid humidity altering means (112) dependent on the measured humidity exceeding the humidity threshold value.
- A mattress cover according to claim 9, wherein the humidity threshold value is in the range from 40% relative humidity to 60% relative humidity.
- A mattress cover according to any of claims 8 to 10, wherein the humidity controller (110) further comprises a heater (116), and wherein the fluid driving means (118) is further operable to drive fluid from the heater through the first fluid outlet (114); and wherein the controller is further operable to measure a temperature of fluid from within the mattress cover (500) and control the operation of the fluid driving means and/or the de-humidifying means and/or the heater (116) dependent on the measured temperature.
- A mattress cover according to claim 11, wherein the humidity controller (110) further comprises a temperature control input (132) configured to set a temperature threshold value, and wherein the controller is configured to operate the fluid driving means (118) and/or the de-humidifying means and/or the heater (116) dependent on the measured temperature being less than the temperature threshold value.
- A mattress cover according to claim 12, wherein the temperature threshold value is in the range from 20 degrees Celsius to 25 degrees Celsius.
- A mattress cover according to any of claims 8 to 13, wherein the fluid driving means (118) of the humidity controller comprises an impeller pump.
- A method for controlling a humidity level of a fluid within a mattress cover (500) according to any of claims 8 to 14 comprising:measuring the humidity of a fluid from within the mattress cover;operating a fluid humidity altering means (112) to alter the humidity of the fluid; andoperating a fluid driving means (118) operable to drive humidity altered fluid from the fluid humidity altering means into the mattress cover (500) wherein the operation of the fluid humidity altering means and the fluid driving means is dependent on the measured humidity of the fluid.
- A method according to claim 15, wherein a herbal aroma is introduced into the mattress cover (500) by the fluid driving means (118).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB201220311A GB201220311D0 (en) | 2012-11-12 | 2012-11-12 | Apparatus and method for controlling humidity within a mattress |
PCT/GB2013/052979 WO2014072752A1 (en) | 2012-11-12 | 2013-11-12 | Mattress cover and method for controlling humidity therein |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2741637A1 EP2741637A1 (en) | 2014-06-18 |
EP2741637B1 true EP2741637B1 (en) | 2015-09-02 |
Family
ID=47470446
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13798712.9A Active EP2741637B1 (en) | 2012-11-12 | 2013-11-12 | Mattress cover and method for controlling humidity therein |
Country Status (3)
Country | Link |
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EP (1) | EP2741637B1 (en) |
GB (2) | GB201220311D0 (en) |
WO (1) | WO2014072752A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11389006B2 (en) | 2019-06-18 | 2022-07-19 | Perfectly Snug Inc. | Air-conditioned mattress topper |
CN110338592A (en) * | 2019-07-26 | 2019-10-18 | 江西蓝臻智能科技有限公司 | A kind of multifunctional intellectual pad |
KR20210124682A (en) * | 2020-04-07 | 2021-10-15 | 엘지전자 주식회사 | Control method of bed |
CN113017332B (en) * | 2021-03-12 | 2022-11-01 | 上海劭宇环保科技有限公司 | Mite removing method for mattress and mite removing mattress |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE510120C2 (en) * | 1995-11-20 | 1999-04-19 | Bengt Freij Arkitektkontor Ab | Methods and apparatus for combating mites in bed |
GB9804704D0 (en) | 1998-03-05 | 1998-04-29 | Hill Brian | Apparatus and method for killing dustmites |
US6336237B1 (en) * | 2000-05-11 | 2002-01-08 | Halo Innovations, Inc. | Mattress with conditioned airflow |
US6546576B1 (en) * | 2001-11-05 | 2003-04-15 | Ku-Shen Lin | Structure of a ventilated mattress with cooling and warming effect |
US20050011009A1 (en) * | 2003-07-15 | 2005-01-20 | Hsiang-Ling Wu | Ventilation mattress |
EP2319474B1 (en) * | 2004-10-06 | 2016-11-23 | Hill-Rom Services, Inc. | Apparatus for improving air flow under a patient |
DE202005016938U1 (en) * | 2005-10-28 | 2007-03-08 | Militz, Detlef | bed system |
GB201113359D0 (en) * | 2011-08-03 | 2011-09-21 | Deighan Lawrence | Apparatus and method for controlling humidity within a mattress |
-
2012
- 2012-11-12 GB GB201220311A patent/GB201220311D0/en not_active Ceased
-
2013
- 2013-11-12 WO PCT/GB2013/052979 patent/WO2014072752A1/en active Application Filing
- 2013-11-12 GB GB201319960A patent/GB2509820A/en not_active Withdrawn
- 2013-11-12 EP EP13798712.9A patent/EP2741637B1/en active Active
Also Published As
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WO2014072752A1 (en) | 2014-05-15 |
GB2509820A (en) | 2014-07-16 |
GB201220311D0 (en) | 2012-12-26 |
EP2741637A1 (en) | 2014-06-18 |
GB201319960D0 (en) | 2013-12-25 |
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