Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
  • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
  • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
  • F25D17/042—Air treating means within refrigerated spaces
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
  • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
  • F25D2317/04—Treating air flowing to refrigeration compartments
  • F25D2317/041—Treating air flowing to refrigeration compartments by purification
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
  • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
  • F25D2317/04—Treating air flowing to refrigeration compartments
  • F25D2317/041—Treating air flowing to refrigeration compartments by purification
  • F25D2317/0411—Treating air flowing to refrigeration compartments by purification by dehumidification
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
  • F25D2700/00—Means for sensing or measuring; Sensors therefor
  • F25D2700/12—Sensors measuring the inside temperature

Definitions

• the present invention relates to devices and methods used for the renewal of vapors and / or polluted air contained in a closed confined space such as a refrigerator intended to contain products exhaling such vapors and / or polluted air or a lava dishwashing machine intended for cleaning the containers for these products, and concerns in particular a device for replacing air in a confined space.
• patent EP 2816306 describes a ventilation system for the treatment of agricultural products and gardening products inside a closed storage room comprising an air mixing unit equipped with a fresh air inlet , an air circulation inlet, a mixing cover which, depending on its degree of opening, mixes the fresh air with the circulating air inside the mixing unit, and an arranged fan to distribute air in the room.
• the patent WO 9706390 relates to a combined unit for a renewal of the air and its packaging, in a controlled atmosphere space and comprising an air evacuation chamber, an air recycling chamber, a chamber of air air supply and a fresh air chamber.
• a supply fan is used to draw air out of the air supply chamber and an exhaust fan is used to draw air out of the exhaust chamber.
• the patent FR 2633376 describes a device consisting of one or more individual storage modules comprising a refrigerator accessible by a door, separated in the direction of the height by shelves slatted and an air distribution grid.
• the device comprises a suction duct and a ventilation duct opening into the insulated enclosure, above the air distribution grille.
• the renewal air is taken from the ambient air and is carried out by a fan according to a program determined according to the nature and quantity of products grouped by affinity in the shelves.
• the document WO 2015/032905 describes a method for preventing leakage of dangerous gas from a container such as, for example, the leakage of flammable refrigerant gas into a storage space, and describes a container having a leakage protection provided with a means to block the access door to this container.
• the main object of the invention is to provide an air renewal device in a confined chamber whose operation precedes the opening of the door by an operator and stops when the door is closed.
• the main object of the invention is therefore a device for replacing air in the enclosure comprising means for evacuating the interior air of the enclosure containing harmful vapors and / or polluted air and / or the humidity, a fan located inside the means of evacuation and being adapted to cause this internal air by the evacuation means, a means of opening the door of the enclosure for locking and unlocking the door, the unlocking of the door being consecutive to a command manual or automatic opening by an opening control means, the door remaining locked as the opening means is activated, its deactivation being consecutive to the achievement of unlocking conditions.
• the device further comprises at least one means for purifying the air before it is discharged through the discharge line.
• FIG. 1 is a schematic representation of the air renewal device according to the invention
• FIG. 2 is a block diagram of the air renewal device according to the invention.
• FIG. 3 is a schematic representation of the air renewal device according to a second embodiment
• Figure 4 is a block diagram of the air renewal device specific to the second embodiment of the invention.
• the air renewal device 10 or 110 is integrated with an enclosure 12, for example by being fixed on the door of the enclosure or on one of its walls.
• the air contained in the enclosure contains harmful vapors and / or pollutants and / or moisture and is referred to as "charged air” in the following description.
• the air renewal device 10 or 110 comprises a discharge conduit 14 requiring the drilling of a hole in the wall of the enclosure 12 for the outlet of the charged air contained inside the enclosure.
• the exhaust duct 14 includes an opening damper 16 which allows the charged air to exit the enclosure when the duct is open as shown by the arrows 18 and 20. Ventilation means such as a fan 22 is started after the opening of the damper 16 to cause the exit of the charged air of the enclosure.
• the air renewal device also includes a means for purifying the exhaust air, ie to make it healthier. This means can be a means for retaining harmful particles such as a filter 17 disposed before the fan 22. The charged air extracted from the chamber thus passes through the filter 17 before being discharged into the evacuation duct 14. The exhaust air in the exhaust duct is purified to prevent the release of polluting particles into the atmosphere.
• the latter can be used for ventilation of the enclosure by connecting the exhaust duct to the ventilation means.
• the means for purifying the charged air before evacuating it avoids the exposure of personnel passing through the room with particles harmful and / or the humidity of the air evacuated from the enclosure.
• air from outside the arrow 36 enters the chamber through an air inlet duct 30 fixed on one of the walls of the enclosure previously drilled so as to renew the air inside the enclosure.
• the air inlet duct comprises a non-return valve 32 and a filter 34.
• the air renewal device 10 comprises a panel of three LEDs.
• a light 23 (white) lights up when the device 10 is powered, a light 24 (red) lights up if the device has a problem, and the third indicator 25 (green) is a pushbutton that flashes while the speaker door is locked and lights continuously when the door is unlocked.
• the LEDs could be replaced by other equivalent means performing the same functions.
• the air renewal device 10 comprises an opening means 26 of the enclosure door for locking and unlocking the door.
• the door opening means 26 may be an electromagnet which prevents the enclosure door from opening as long as it is activated. As soon as it is no longer activated and therefore the indicator 25 remains lit continuously, the door of the enclosure is unlocked and can open.
• the electromagnet could have an emergency disabling means such as a push button.
• the fan 22 continues to extract the air through the conduit 14 after opening the door of the enclosure (detected by a door opening contact) and stops only when closing the subsequent door.
• the register 16 which operates in parallel with the fan also remains open until the closing of the door. Thus, it is the closing of the door that stops the fan. This characteristic is important insofar as the enclosure is in slight depression, which protects the operator in case the indoor air has not yet been completely renewed and still presents a danger. It is therefore necessary to continue to operate the fan as the door is not closed.
• the air renewal device comprises a programmed automaton 28 adapted to the control of the various means implemented.
• the programmed automaton 28 When the programmed automaton 28 receives the command to control the unlocking of the door, it sends an opening command to the register 16 so as to open the door. Evacuation duct 14. Almost simultaneously, the controller 28 sends an activation command to the fan 22. Then, the controller 28 sends a command to the electromagnet 26 to deactivate it in order to open the door of the enclosure when certain unlocking conditions are achieved.
• the air intake duct 30 comprises an automatic opening and flow control means such as a register controlled by the programmed automaton 28 and 128.
• This opening means could also be an automatic valve with a small orifice allowing the entry of air in a limited way.
• the enclosure 12 may be a refrigerator containing chemicals that must be kept at a temperature below room temperature. These products belong to categories of products posing a danger to health. In particular, they can release harmful vapors and / or pollutants that can be dangerous or toxic to the health of an operator called to handle them.
• the aperture control means includes the pushbutton or indicator 25, but may also include other means such as an infrared detection sensor activated when a hand enters its field of view. So when an operator wants to open the refrigerator, he presses the push button to control the opening. This order is received by the programmed automaton 28 which then performs the previously described steps.
• the device according to the invention may comprise a presence detector and the order to control the unlocking of the door may also be given by the detection of the presence of an operator by this detector.
• the "button” and “infrared sensor” opening control means as well as “button” and “presence detector” can be accumulated.
• the unlocking conditions for a refrigerator are for the most part pre-established, ie they are set in advance according to the nature of the products that the refrigerator must contain, their concentration and the volume of air to be extracted. As will be seen below, certain conditions, so-called security can also be added exceptionally to the conditions necessary for the door of the enclosure 12 to unlock.
• the programmed automaton 28 can also automatically give the order to control the unlocking of the door and therefore the start of the air renewal cycle after a predetermined duration has elapsed during which no door opening command was ordered. This timer is useful for removing pollutants that can be concentrated in the refrigerator when the air in it has not been renewed for a long time such as during the night or during the weekend.
• the enclosure 12 may be a dishwasher used in chemistry laboratories to clean the glassware.
• a water-proof cover 35 is placed at the level of the hole drilled in the wall which opens into the duct. 14 to prevent water from entering the vent.
• a nonreturn valve 33 located at the beginning of the evacuation duct 14 prevents the air loaded back into the chamber 12 in the opposite direction of the arrow 20.
• the air renewal device 110 also includes a means for purifying the exhaust air, that is to say to make it healthier.
• This means can be a means 27 for decreasing the moisture content of the exhaust air such as a vapor trap associated with a retention tank 29 which recovers the condensates.
• the steam trap is disposed in the exhaust duct 14 just after the check valve 33.
• the steam trap is for example a device for separating drops by inertia consisting of a set of sinusoidal shaped blades.
• the moisture - laden airflow passes between the blades while the water droplets due to their greater inertia can not follow the changes of direction and collide with the blades.
• the droplets are trapped and assemble to form a gravity-fed liquid to a holding tank 29.
• the holding tank is emptied manually or can be connected to the dishwasher drain system.
• the air Before being discharged into the exhaust duct 14, the air can also pass through a particulate filter such as filter 17.
• the air renewal device according to the embodiment adapted to the dishwasher comprises a programmable controller 128 adapted to the control of the various means implemented.
• the command to control the unlocking of the door can be received by the PLC 128 in two different ways.
• the order may be manual by the actuation of the pushbutton or indicator 25 by the operator and the order may be automatic consecutively upon receipt of a washing cycle end signal 37 from the electronic card 39 of the lava -washing up.
• This function requires that the programmed automaton 128 of the air renewal device 110 be electronically connected to the electronic circuit board of the washer. washing up. 1 / Manual activation of the door release control allows the operator to open the door while the wash cycle is not completed.
• the programmed controller 128 when the programmed controller 128 receives the command to control the unlocking of the door, it sends an opening command to the register 16 so as to open the evacuation duct 14. Almost simultaneously, the controller 128 sends an activation command to the fan 22. Then, the controller 128 sends a command to the electromagnet 26 to deactivate it in order to open the door of the enclosure when certain unlocking conditions are achieved.
• the programmed PLC receives data measured by sensors 31 on the temperature, the humidity level and the rate of harmful particles of the charged air coming from inside the dishwasher.
• the sensors are placed in the exhaust duct 14 between the means 27 to reduce the moisture content of the exhaust air and the opening register 16 but could also be located before the means 27.
• the device according to the invention applied in the dishwasher avoids the operators to be exposed to hot vapors at the time of opening the door but also protects the air exhaust ducts against mold due to excessive moisture.
• the red indicator lights up in case of problems, ie when the safety conditions for the operator and for the installation are no longer met.
• the red light 24 can also be coupled to an audible alarm such as a buzzer.
• the interior thereof is in depression relative to the outside. Indeed, it is necessary to have a vacuum inside the enclosure to prevent the charged air out through the door when it opens. Therefore, it is advisable to install a vacuum detector whose measurement is added to the conditions necessary for the door of the enclosure to unlock. In the case where the vacuum is lower than the programmed threshold value and stored in the PLC 28 or 128, the red LED 24 lights up and the buzzer beeps to indicate to the user that the ventilation has not occurred. unwrapped correctly and the electromagnet remains activated.
• a temperature sensor measures the temperature in a control vial containing brine in the refrigerator. If the temperature is warmer than the set threshold temperature and stored in the PLC 28, the red LED flashes, the buzzer beeps and the electromagnet remains on and the ventilation switches off.
• a door opening system may be provided for example by a prolonged press on the green button or indicator 25.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Thermal Sciences (AREA)
• General Engineering & Computer Science (AREA)
• Ventilation (AREA)
• Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
• Filtering Of Dispersed Particles In Gases (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=61599451

Family Applications (1)

Country Status (5)

Families Citing this family (2)

Family Cites Families (5)

• 2017
  • 2017-11-28 FR FR1771268A patent/FR3074267B1/fr active Active
• 2018
  • 2018-11-28 US US16/767,736 patent/US20210003338A1/en not_active Abandoned
  • 2018-11-28 AU AU2018376873A patent/AU2018376873A1/en not_active Abandoned
  • 2018-11-28 WO PCT/FR2018/000259 patent/WO2019106242A1/fr unknown
  • 2018-11-28 EP EP18825741.4A patent/EP3717838B1/de active Active

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