CZ2018741A3 - Dehumidifier, in particular for air cooling or air-conditioning machines - Google Patents

Abstract

The solution relates to an dehumidifier, in particular for air-cooled or air-conditioning machines, arranged inside the cooling chamber (1) before the air exits the cooling chamber (1). The dehumidifier (4) comprises a body (41) in which a cleaning cassette (42) is housed, comprising a screen (424) coupled to the ultrasonic radiator (5), a snow and / or ice collector (43) being arranged below the cleaning cassette (42). to which a snow and / or ice conveyor (44) is assigned, which opens into a snow and ice collecting container (45). The collecting container is stored outside the cooling chamber (1).

Description

Dehumidifier, especially for air cooling or air conditioning machines

Field of technology

The invention relates to an air dehumidifier, in particular for air-cooled or air-conditioning machines, arranged inside a cooling chamber before air exits the cooling chamber.

Prior art

With air coolers, dehumidification of cooling air, which contains water, is a major problem, as the water changes to a solid state at temperatures below 0 ° C and is deposited on cold surfaces inside the cooling device such as snow or ice. Freezing causes the efficiency of the air cooler to decrease until its operation is interrupted, resulting in frequent maintenance of snow and / or ice removal machines, which must be stopped.

At present, adsorbers or dryers are used as dehumidifiers.

Document RU 2200283 C1 describes an adsorber in which a special sorbent is used. At low temperatures, the sorbent has low absorption, which leads to frequent replacement of columns / adsorbers for their regeneration, until the sorbent becomes inoperable. In addition, the presence of water in the air stream leads to the formation of snow / ice at the inlet to the working volume of the sorbent-filled adsorber. The amount of snow / ice increases rapidly and reduces the cross-section of the device until it is completely filled, thus disabling it. In addition, at atmospheric pressure, the absorption capacity of the adsorbers is considerably less than when working with compressed air. Snow and / or ice is removed from the adsorber after the cooling is stopped by heating it.

Document RU 2360186 C1 describes a dryer in which drying is carried out by cooling. Creating such a dryer for temperatures below -60 ° C is very difficult, as it is necessary to use a cascade cooling technique with different cooling media. In addition, the air stream refrigeration dryer requires increased heat transfer areas at atmospheric pressure.

Disc adsorbers with constant regeneration are known, but their use is associated with a significant increase in temperature in the operating mode and increased energy consumption for the regeneration system.

Patent application JP 2004066162 describes a device for removing oil dust, which consists of a labyrinth dehumidifier, in which the separation takes place as a result of multiple enlargements and decreases of the cross-section. Water or oil collects on the plates forming the labyrinth and flows down. Such a device cannot work in cases of a phase transition, i.e. freezing of water or another substance, because in this case the passage cross-section is completely blocked.

Furthermore, patent application GB 2380246 is known, which describes a method for removing moisture from a refrigeration unit. This solution is based on the passage of air through a body that is filled with a metal mesh. In this case, moisture settles on the net and drains into the body. When the temperature drops below 0 ° C, the same problem arises as in adsorption dryers, ie freezing of ice on the inlet surface of the network block until the passage cross-section is completely covered. Even with this solution, snow and / or ice is removed from the metal screen by heating it, for which it is necessary to interrupt the cooling process.

Various systems using an ultrasonic transducer coupled to a screen of a vibratory screening machine are known in the art. One such system is the Vibrasonic® 2000 Mesh Deblinding System, manufactured by Russel Finex Limited, of Russel House, Browells Lane, Feltham, Middlesex TW13 PEW, England. This device prevents the mesh of the vibrating screen machine from clogging, especially when sieving very fine materials, such as powder glazes,

- 1 EN 2018 - 741 A3 alumina, powdered toners, etc. The device is not intended for removing moisture from cold air in cooling systems.

The object of the invention is to prolong the operating time of the air cooling machine without interruption due to the removal of snow and / or ice from the moisture separator and to ensure the removal of moisture during the operation of the machine.

The essence of the invention

The object of the invention is achieved by an dehumidifier, the essence of which consists in a body in which a cleaning cassette containing a sieve coupled to an ultrasonic radiator is placed, a snow and / or ice collector is arranged below the cleaning cassette, to which a snow and / or ice conveyor is assigned. which opens into a snow and / or ice collection container. The collecting container is stored outside the cooling chamber. The dehumidifier allows snow and / or ice to be removed from the cooling chamber without interrupting the operation of the air cooling or air conditioning machine. Continuity of operation reduces the cost of defrosting the system and, as a result, increases the energy efficiency of the system as a whole.

In a preferred embodiment, the cleaning cassette comprises an outer frame, in which an inner frame, which is coupled to an ultrasonic radiator, is accommodated by means of flexible couplings, the inner space of both frames being filled with a metal screen. The vibrations of the inner frame vibrate the sieve and release icing from it, which falls into the inner space of the snow and / or ice collector.

To remove snow and / or ice from the interior of the cooling chamber, it is advantageous if at least the outer part of the snow and / or ice conveyor between the cooling chamber and the snow and / or ice collection container is housed in a housing, the housing also being formed in the interior. cooling chamber space.

A pressure relief valve is mounted on the housing to equalize the pressure inside the cooling chamber.

Explanation of drawings

Exemplary embodiments of the invention are schematically illustrated in the accompanying drawings, in which: FIG. 1 shows the arrangement of a separator and a separating valve in a cooling chamber, FIG. 2a is a front view of the separator in the cooling chamber in partial section. Giant. 2b a side view of the separator, FIG. 3a is a front view of the cleaning cartridge, and FIG. 3b is an axonometric view of the cleaning cartridge.

Examples of embodiments of the invention

In air cooling machines, air is used as the refrigerant, which contains water in the form of water vapor, which, however, solidifies at temperatures below 0 ° C. To prevent solid particles of water, ie snow and / or ice, from entering the air ducts and other components of the refrigeration machine system, dehumidifiers are used, which are usually located directly in the cooling chamber.

1. Low-temperature cooling air is supplied to the cooling chamber 1 by a supply air duct 21, and from the cooling chamber 1, air is discharged by a supply air duct 22. The supply air duct 21 is connected to an inlet 31 of a double three-way or isolating valve 3. air duct 22 and which is arranged in the inner space of the cooling chamber L Cooling air from the supply air duct 21 passes through the inlet 31 to the double three-way or isolating valve 3 and from there is supplied to the air inlet 11 to the cooling chamber L. Before the air outlet 12 from the cooling chamber 1 is inside a dehumidifier 4 is arranged in the cooling chamber 1, through which air passes before leaving the cooling chamber 1 and

-2GB 2018 - 741 A3 in which solid water particles are trapped. The double three-way or isolating valve 3 is coupled to the machine control system.

The dehumidifier 4 comprises a body 41 in which a cleaning cassette 42 is housed, under which a snow and / or ice collector 43 is arranged in the body 41 of the dehumidifier 4, into the inner space 431 of which a snow and / or ice conveyor 44 extends through the wall of the cooling chamber. 1 to the outer space, where it opens into a snow and / or ice collection container 45. The snow and / or ice collection container 45 may be located on or at a distance from the outer shell of the cooling chamber. At least the outer part of the conveyor 44 between the cooling chamber 1 and the snow and / or ice collecting vessel 45 is housed in a housing 46. on which a pressure relief valve 47 inside the cooling chamber 1 is mounted, the housing 46 passing through the interior in the illustrated embodiment cooling chamber 11 up to the body 41 of the dehumidifier 4. The expansion valve 47 can also be mounted on the collecting vessel 45 or directly on the cooling chamber L.

The cleaning cassette 42 comprises an outer frame 421, in which an inner frame 423 is accommodated by means of resilient connectors 422. The space inside both frames 421 and 423 is filled with a metal screen 424. The inner frame 423 of the cleaning cassette 42 is coupled to an ultrasonic radiator 5 from which vibrations on the screen 424. The radiator 5 is coupled to the machine control system for control. The cleaning cassettes 42 can be arranged in the body 41 several in a row in the direction of air flow.

The snow and / or ice conveyor 44 is formed, for example, by a screw conveyor or a chain conveyor and is coupled to a known drive (not shown) which is coupled to a machine control system.

During cooling, cooling air passes through the body 41 through the screen 424 of the cleaning cartridge 42, and if it contains moisture, it is deposited on the screen 424 in the form of snow and / or ice, thereby reducing the cross-section of the screen 424 and reducing its flow capacity. As soon as the reduction of the flow capacity of the screen 424 reaches the set limit, the machine control system instructs to move the double three-way or isolating valve 3 to a position in which cooling air does not enter the cooling chamber 1 but flows through the air ducts and machine components in front of the cooling chamber 1. the air flow in the cooling chamber 1 stops and no air passes through the sieve 424. The machine control system activates an ultrasonic radiator 5, the vibrations of which are transmitted to the screens 424 of the cleaning cartridge 42. As a result of the vibrations of the screens 424, solid snow and / or ice particles fall off and transported by gravity to a snow and / or ice collector 43 arranged in lower part of the body 41. Once a predetermined amount of snow and / or ice has accumulated in the collector 43, or whenever snow and / or ice is removed from the screen 424, the machine control system actuates a conveyor 44 which displaces the snow and / or ice to a collecting vessel 45 arranged outside the cooling chamber L. Snow and / or ice is removed from the collecting vessel 45 as required, preferably allowed to dissolve, or is dissolved by forced heating and drains into an associated waste pipe (not shown).

After removing snow and / or ice from the screens 424 of the cleaning cassette 42, the machine control system stops the ultrasonic radiator 5 and moves the double three-way or isolating valve 3 to a working position in which air flows into the cooling chamber through the valve 3 after passing through the cooling chamber. and exits the cooling chamber L via the valve 3

During the circulation and cooling of the air and the removal of snow and ice from the cooling chamber 1, a negative pressure is created in the cooling chamber 1, which is compensated by sucking ambient air through a balancing valve 47, which in the illustrated embodiment is arranged on the snow and / or ice collecting vessel 45. . In this arrangement, it is preferred that the intake air pass around the cold conveyor 44, thereby cooling and precipitating at least a portion of the moisture therefrom.

Industrial applicability

The separator according to the invention can be used in air cooling or air-conditioning machines.

Claims (5)

PATENT CLAIMS An dehumidifier, in particular for air-cooled or air-conditioning machines, arranged inside the cooling chamber (1) before the air exits the cooling chamber (1), characterized in that it comprises a body (41) in which a cleaning cassette (42) is housed. comprising a screen (424) coupled to the ultrasonic radiator (5), and a snow and / or ice collector (43) is arranged below the cleaning cassette (42), to which a snow and / or ice conveyor (44) is associated, which opens into a collecting vessel (45) snow and ice, stored outside the cooling chamber (1). Dehumidifier according to claim 1, characterized in that the cleaning cassette (42) comprises an outer frame (421) in which an inner frame (423) is accommodated by means of flexible couplings (422), the space inside the two frames (421, 423) it is filled with a metal screen (424) and the inner frame (423) is connected to an ultrasonic radiator (5). 3 double three-way or isolating valve 31 inlet of double three-way or isolating valve 32 output of a double three-way or isolating valve 3 drawings List of reference marks Even a cooling chamber II air inlet to the cooling chamber 12 air outlet from the cooling chamber 21 supply air duct 22 exhaust air duct Dehumidifier according to Claim 1 or 2, characterized in that at least the outer part of the conveyor (44) between the cooling chamber (1) and the snow and / or ice collecting vessel is accommodated in a housing (46). 4 dehumidifier 41 dehumidifier body 42 cleaning cartridge 421 outer cassette frame 422 flexible couplings 423 inner cassette frame 424 metal sieve 43 snow and / or ice collector -4EN 2018 - 741 A3 431 snow and / or ice collector interior 44 snow and / or ice conveyor 45 snow and / or ice collection container 46 conveyor housing 47 balancing valve Dehumidifier according to Claim 3, characterized in that the entire snow and / or ice conveyor (44) is accommodated in the housing (46). Dehumidifier according to any one of the preceding claims, characterized in that it is provided with a valve (47) for equalizing the pressure between the inner space of the cooling chamber (1) and the outer space. Dehumidifier according to Claim 5, characterized in that the expansion valve (47) is mounted on the housing (46). Dehumidifier according to Claim 5, characterized in that the expansion valve (47) is mounted on a snow and / or ice collecting vessel (45). 5 ultrasonic radiator