RU2194219C2 - Ventilation facility - Google Patents

Abstract

FIELD: ventilation equipment employed in erection and reconstruction of engineering system intended for objects of various assignment. SUBSTANCE: ventilation facility includes body with two spiral guides, two suction and two pressure branch pipes, impeller with bearing and working parts, partition. Bearing part of impeller is fitted with blades, partition is made up of two parts and is located outside of impeller. EFFECT: stable and high-efficiency heat mass transfer. 6 cl, 5 dwg

Description

 The invention relates to devices for ventilation and can be used in the creation and reconstruction of engineering systems in the construction of facilities for various purposes.

 Known ventilating device, including a heat exchanger, supply and exhaust fans, suction and discharge pipes [1].

 In the heat exchanger of the specified device, heat is exchanged between the supply and exhaust air.

 The disadvantage of this device is the decrease in the efficiency of the heat transfer process when the heat exchanger is contaminated, as well as the unreliability of operation due to a sharp decrease in efficiency, until the heat transfer is completely stopped, at negative values of the supply air temperature due to freezing of condensed water in the heat exchanger channels.

 It is also known ventilating heat and mass transfer device, including a heat exchanger with semi-permeable partitions, supply and exhaust fans, suction and discharge pipes [2].

 In the heat exchanger of the specified device carry out heat and mass transfer. Heat is transferred through both heat conduction and mass transfer: part of the condensate passes from the supply ducts to the exhaust ducts through semi-permeable partitions.

The disadvantage of this device is the decrease in operating efficiency with contamination of the heat exchanger and the termination of heat transfer at a supply air temperature below minus 10 ^o C.

 Closest to the proposed one is a device comprising a housing with spiral guides, two suction and two discharge nozzles, an impeller with a supporting and working parts, the working part being made of porous material, a partition placed inside the impeller [3].

 In this device, the movement of air, as well as heat and mass transfer is carried out by rotating the impeller and "blowing" air through a layer of porous material of the working part, which performs, among other things, the function of an air filter.

 The disadvantage of this device is the low efficiency of the processes of air movement and heat and mass transfer during contamination of the porous material of the impeller.

 The objective of the invention is to increase the efficiency of the device.

 This task is achieved in that the supporting part of the impeller is equipped with blades, and the partition is located outside the impeller.

 The partition can be made of two parts.

 The partition may be provided with guides.

 Spiral guides can be installed with the possibility of changing their position relative to the impeller.

 The device may be equipped with a mixing chamber.

 The device can be equipped with inflow and exhaust chambers.

 The device can be equipped with supply and exhaust rotors located in the inlet and exhaust chambers, respectively.

 One of the parts of the partition can be placed in a plane at an angle to the axis of rotation of the impeller.

 The impeller is made of porous material.

 In Fig.1 shows a device with a removed wall of the housing, General view.

 In FIG. 2 shows a view of the device with the side wall of the housing removed, side view. A variant of the other position of the spiral guides is indicated by a dashed line.

 Figure 3 presents a General view of the device with mixing chambers, inflow, exhaust, as well as supply and exhaust rotors, a section in the plane and along the axis of rotation of the impeller.

 Figure 4 shows the design of the inflow chamber, a section along aa of the device of figure 3.

 In FIG. 5 shows the lower part of the device casing with a partition installed at an angle to the axis of rotation of the impeller, plan.

 The device includes a housing 1 with spiral 2 guides, two suction 3 and two discharge 4 nozzles, an impeller 5 with a supporting 6 and working 7 parts, a partition 8.

 It is possible to make a partition 8 of two parts.

 It is advisable to provide the partition 8 with guides 9.

 Spiral 2 guides can be installed with the possibility of changing their position relative to the impeller 5.

 It is possible to make a device with mixing chambers 10, inflow 11 and exhaust hood 12.

 It is possible to provide the impeller 5 with a supply 13 and exhaust 14 rotors located in the chambers of the inflow 11 and exhaust 12, respectively.

 It is possible to install one of the parts of the partition 8 in a plane at an angle to the axis of rotation of the wheel 5.

 The device operates as follows.

 The rotation of the impeller 5 provides an oppositely directed movement of the supply and exhaust air through the nozzles formed by the walls of the housing 1 and parts of the partition 8.

 During rotation, all surface elements of the working part 7 of the wheel 5 are cyclically moved from the channel with warm air to the channel with cold air and vice versa.

 In the process of intense interaction, warm air effectively heats the corresponding segment of the working part 7 of the wheel 5, which, in turn, gives the received heat to cold air. In parallel, mass transfer is carried out in the device. Part of the moisture condensing on the surface of the working part 7 of the wheel 5 in the “warm” zone is transferred by the rotation of the wheel 5 to the “cold” one and there it evaporates.

 The blades of the supporting part 6 of the wheel 5 intensify the process of moving air.

 The use of spiral 2 guides allows you to streamline the air flows and intensify the effect of their interaction with the wheel 5, which helps to increase the efficiency of air movement and heat and mass transfer. The installation of spiral 2 guides with the ability to change position relative to the wheel 5 makes it possible to adjust the device to the desired mode of operation by changing the parameters of the interaction of air flows and the wheel 5.

 The use of the guides 9 of the partition 8 allows to reduce the hydraulic resistance at the initial and final stages of the interaction of air flows with the wheel 5.

 When using the device as a separate ventilation module, it is equipped with inflow 11 and exhaust chambers 12.

 If it is advisable to use recirculation, the device is equipped with a mixing chamber 10. Structurally, this is achieved by installing part of the partition 8 with a gap with respect to the working part 7 of wheel 5. In the recirculation mode, part of the exhaust air is mixed with the supply air and sent to the consumer.

 The installation of one of the parts of the partition 8 at an angle to the axis of rotation of the wheel 5 allows you to organize the flow dynamics in such a way that the intake air from the intake chamber 11 and the exhaust air are pumped into the exhaust chamber 12 only by rotating the wheel 5.

 If the device operates in conditions where the distance from the intake and exhaust air intake is large, it is advisable to equip the device with supply 13 and exhaust 14 rotors located in the chambers of the inflow 11 and exhaust 12, respectively. This allows you to overcome the hydraulic resistance in the channels and increase the efficiency of the device.

 In the process of operation of the device, heat transfer efficiency is not reduced, since the process is carried out not in volume, but at the surface of the working part 7 of the wheel 5. Due to the fact that the working part 6 does not function as a filter element, it is not contaminated, which allows for stable and highly efficient heat and mass transfer.

Sources of information
1. Catalog of the company Kanalflakt, 1999 - analogue.

 2. The brochure of CITES is an analogue.

 3. Catalog of the company FRIVENT, 1998 - prototype.

Claims (7)

 1. The ventilating device, comprising a housing with spiral guides, two suction and two discharge nozzles, an impeller with a supporting part and a working part of porous material, a partition, characterized in that the supporting part of the impeller is equipped with blades, and the partition is made of two parts and located outside the impeller.  2. The device according to p. 1, characterized in that the partition is provided with guides.  3. The device according to p. 1, characterized in that the spiral guides are installed with the possibility of changing their position relative to the impeller.  4. The device according to p. 1, characterized in that it is equipped with inflow and exhaust chambers.  5. The device according to p. 1 or 4, characterized in that it is equipped with a mixing chamber.  6. The device according to claim 1 or 4, characterized in that the impeller is equipped with supply and exhaust rotors located in the inlet and exhaust chambers, respectively.  7. The device according to claim 1 or 4, characterized in that one of the parts of the partition is installed in a plane at an angle to the axis of rotation of the impeller.

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