FI96635C - Heat recovery apartment-specific air conditioning / ventilation equipment and method for implementing by-pass in this equipment - Google Patents

Description

The invention relates to a heat-recovering apartment-specific air-conditioning / ventilation system according to the preamble of claim 1.

The invention also relates to a method for implementing bypass in an apartment-specific air conditioning / ventilation system.

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In addition to terraced and detached houses, apartment-specific air-conditioning / ventilation systems that recover heat from the exhaust air have also been installed in apartment buildings. Exhaust air heat is used to heat the replacement air (outdoor air) entering the apartment. Energy-saving heat recovery equipment has one of 15 disadvantages. During the summer, heat recovery works too well and the apartment tends to overheat, as possibly already too warm indoor air heats the replacement outdoor air. A natural solution would be to take replacement air in summer time through a separate bypass duct past the heat exchanger. Since the aim is to keep the air conditioning / ventilation equipment for each apartment as small as possible 20 so that it can be placed in the closets, there is no extra space for separate bypass pipes.

.. There are also “hollow” cells that replace the heat exchanger, which are unable to recover heat. • · · · This solution has the disadvantage of finding storage space for extra cells, one for each apartment, especially in 25 apartment buildings.

The object of the present invention is to obviate the shortcomings of the technique described above and to provide a completely new type of heat-recovering apartment-30 air-conditioning / ventilation equipment as well as a method for implementing bypass in this equipment.

The invention is based on the fact that the flow surfaces of the heat exchanger are interleaved on the inlet and outlet sides.

2 96635 More specifically, the apparatus according to the invention is characterized by what is set forth in the characterizing part of claim 1.

The method according to the invention, in turn, is characterized by what is set forth in the characterizing part of claim 9.

The invention provides considerable advantages.

With the solution according to the invention, the efficiency of the heat exchanger can be reduced by 10 simple maintenance procedures. Separate summer and winter heat exchangers are not required. The solution does not require additional space in the air conditioner / ventilation unit. The solution according to the invention also makes it possible to cool the apartment at night or when the apartment is subjected to an additional heat load. Such situations arise, for example, at parties when there are more than 15 people in the apartment than usual.

The invention will now be examined in more detail with the aid of exemplary embodiments according to the accompanying figures.

Figure 1 shows a cross-sectional end view of an air conditioning / ventilation device according to the invention.

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Figure 2 shows a top view of the air conditioning / ventilation device according to Figure 1.

Figure 3 shows a perspective view of a heat exchanger according to the invention.

Figure 4 shows an end view of the heat exchanger according to Figure 3.

Fig. 5 shows a top view of the heat exchanger according to Fig. 3.

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Fig. 6 shows an end view of the heat exchanger of Fig. 3 mounted on an air conditioning / ventilation unit.

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According to Figures 1 and 2, the air conditioning / ventilation equipment consists of an inlet duct 2 and an outlet duct 3, which are not in direct contact with each other. However, the flow of both channels passes through the heat recovery cell 1. The heat recovery cell 1 is also referred to herein as a heat exchanger. The heat-5 exchanger 1 is a cell structure in which the inlet and outlet cells at an angle of 90 degrees to each other alternate. In adjacent cells, cross-flows flow through each other and heat is transferred through the wall between the cells from a warmer flow to a colder one. The widest possible common cell surface area (dense cell) is aimed at efficient heat transfer of heat energy from the exhaust air to the supply air. With the current structures, an efficiency of 60% is achieved. In practice, the heat exchanger 1 is a square cross-sectional structure in which the supply air inlet surface 10, the supply air outlet surface 12, the exhaust air inlet surface 11 and the exhaust air outlet surface 13 can be defined. Filters 6 and 7 are located on both inlets 2 and 3. . Exhaust air is again led out of the apartment via exhaust duct 5. The air flow is provided by an exhaust fan 9 placed in the exhaust duct 3. The flow can also be enhanced by a fan located on the inlet duct side. The exhaust fan 9 can also be mounted in such a way that the exhaust air is also directed upwards like the air 20 entering the apartment. Thus, of course, in Fig. 2, the outlet channel 5 would be visible on the upper surface of the apparatus.

According to Figure 3, the total flow area A of the heat exchanger is A. This surface includes the entire area of the cell structure as well as the area of the possible free flow channels 25 16. According to the invention, from the area A of the inlet surface 11 of the outlet duct

about half is closed by a flow restrictor plate 15 to reduce the efficiency of the heat exchanger. A corresponding operation is performed on the flow restrictor plate 14 in that part of the inlet channel inlet surface 10 which is not covered by the outlet channel inlet surface 11. That is, the flow surfaces 10 and 11 of the heat exchanger 1 are interleaved with respect to each other 30. By this procedure, the common heat transfer surface of the inlet and outlet duct is limited to the surface formed by one cell element, the heat transfer capacity of which is insignificant with respect to the heat transfer capacity of the entire heat exchanger 1.

According to Figure 4, the heat exchanger is rectangular. The length of the side of the rectangle forming the cell structure is typically 195 mm. As shown in Figure 5, with its lugs, the maximum dimension is 215 mm.

According to Fig. 5, the total flow surface A can be defined as the sum of the areas of the flow restriction plate 15, the free cell surface and the free flow channel 16. As a percentage, the free flow opening 16 accounts for about 8% of the surface A, the flow restrictor plate 10 for about 50%, leaving the cell structure for about 42%.

According to Fig. 6, the flow restrictor plates 14 and 15 are fastened to the heat exchanger 1 by hinges 17. Both the closed and open positions are lockable.

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Alternatively, the flow restrictor plates 14 and 15 can also be hinged to the body of the air conditioning / ventilation device.

The flow restrictor plates 14 and 15 can also be completely loose structures, which 20 are attached to the heat exchanger 1 by suitable locking devices.

.. Limiting the flow surface to two interlaced areas according to the above figures naturally lowers the efficiency the most, because only the wall of one cell acts as a common heat transfer surface. Within the scope of the inventive idea, the flow restrictor plates can be divided into arbitrarily many parts, as long as they are interleaved with respect to each other. However, the more parts the plates are divided into, the more common heat transfer surfaces are created and the desired efficiency reduction may not be achieved. A reasonable limit value could be to divide the plates into four parts.

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By placing the plates 14 and 15 on the flow inlet surfaces 10 and 11, the advantage is achieved that the air flow presses the plates into place. The efficiency-reducing effect according to the invention is also achieved by placing the plates 14 and 15 on the outlet surfaces 12 and 13 of the heat exchanger 1. In this case, a suitable locking mechanism must be used to hold the plates in place against air flow. Of course, it is also possible to place, for example, an inlet flow baffle plate 14 5 on the inlet surface 10 and an outlet flow baffle plate on the outlet surface 13 or vice versa.

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Claims (7)

A heat-recovering apartment-specific air conditioning / ventilation system comprising 5 - an exhaust duct (3) for conducting apartment air as a supply flow from the interior, - an inlet duct (2) for conducting outdoor air as an inlet flow to the interior, 10 - a ventilation unit (9) for vacuuming the exhaust duct (3), 2) and a heat exchanger (1) connected to the exhaust duct (3), by which the air coming through the inlet duct (2) can be heated by the exhaust air coming through the exhaust duct (3), the heat exchanger (1) comprising flow inlet surfaces (10, 11) and flow outlet surfaces (12, 13), and - flow restrictor plates (14, 15) arranged in connection with the heat exchanger (1) to reduce the heat recovery capacity of the heat exchanger, characterized in that - the flow restrictor plates (14, 15) are arranged at the inlet (2) of the heat exchanger (1) and outlet channels (3) so that the baffle plates (14,15) are on both flow inlet surfaces (10, 11) interleaved, whereby a part of the flow area (A) of the heat exchanger (1) can be reserved only for the flow and for the flow only, respectively. 2. An arrangement according to claim 1, which comprises an insert (14, 15) and an arrangement according to the color transfer (1) in the form of an inverter (10, 5). Apparatus according to claim 1, characterized in that the baffle plates (14, 15) are one on each flow inlet surface (10, 11) of the heat exchanger (1). a «i a *» i i - * * # · · 7 96635 3. Anordning enligt segot av de föregäende patentkraven, kännetecknad av att begränsningsskivorna (14, 15) ei lika Stora account alealen. 10 Apparatus according to one of the preceding claims, characterized in that the baffle plates (14, 15) have equal surface areas. 4. The arrangement according to the preceding claims, which includes a reference ring (14, 15) and an arrangement according to the invention. Apparatus according to one of the preceding claims, characterized in that there are a plurality of pieces of baffle plates (14, 15) in their flow surface. 5. The provisions relating to the patent patent, which are incorporated in the invention (14, 15) and which are based on the requirements of the patent law for the purposes of the accounts. Apparatus according to one of the preceding claims, characterized in that the baffles (14, 15) are hinged to the heat exchanger in order to move them to and from the summer position. 10 6. An arrangement according to the claims of the invention, 20 turns of which are shown in the preamble (14, 15) in the form of a color transfer (1). Apparatus according to one of the preceding claims, characterized in that the removable baffles (14, 15) are fastened to the heat exchanger (1) by means of locking devices. A method for implementing bypass in a heat recovery apartment-specific air conditioning / ventilation system, comprising - an outlet duct (3) for discharging apartment air from the interior as a flow, 20 - an inlet duct (2) for conducting outdoor air to the interior as an inlet flow, - a ventilation unit (9) A heat exchanger (1) connected to the inlet duct (2) and the outlet duct (3), by which the air coming through the inlet duct (2) can be heated by the exhaust air coming through the outlet duct (3), the heat exchanger (1) comprising flow inlet surfaces (10, 11) and flow outlet surfaces (12, 13), and 30. the flow of the heat exchanger (1) is limited if necessary, characterized in that the flow of the heat exchanger (1) is limited to the inlet (2) and outlet ducts (3) on both inlet surfaces of the heat exchanger (1) ( 10, 11) with flow restrictor plates interleaved relative to each other (14,15), in which part of the flow area (A) of the heat exchanger (1) can be reserved only for the flow background and for the flow only, respectively. 9 96635 * 1. Air conditioning / ventilation arrangements with color heating system, including 5 - to-end passage (3) for air-conditioning system with rumming device in the form of an overhead passage, - with in-room passage (2) for luft til rumsutrymmet 10. form av en incommande strömning, - en ventileringsmaskin (9) för generering av ett undertryck i utloppspassagen (3), 15. en account inloppspassagen (2) oc utloppspassagen (3) kopplad värmeväxlare (1), medelst vilken den genomic inpass (2) inoculated with a genomic inoculum (3) in the presence of a genomic inpass (10, 11) and an inpass (12, 13) for air (20, 20), 14, 15) anordnade i värband med värmeväxlaren (1) for reducing the värmeväxlaren värmeatervinningsförmaga, 25 kännetecknad av att - strömbegränsningsskivoma (14, 15) är anordnade i värmeväxlaren s (1) inlopps- (2) och utloppspassage (3) päsä sätt, att 30 begränsnings-skivorna (14,15) överlappar varandra pa Bada in- loppsytorna (10, 11) för strömmen, varvid en del av Värmeväxla-: · Rens (1) strömningsareal (A) kan reserveras för itself utgaende 10 96635 strömning resp. self incommande strömning. 6 96635 7. For the purposes of this Regulation, the use of air conditioning systems for air conditioning / ventilation is required in accordance with paragraph 25 (3) for the use of air conditioning systems in the form of an air conditioning system. (2) for the use of fresh air in the rumous compartment 30. form av en incommande strömning, .. - en ventileringsmaskin (9) for generating av undertryck i 11 96635 utloppspassagen (3), - en till inloppspassagen (2) och utloppspassagen (3) ) kopplad 5 värmeväxlare (1), medelst vilken den genom inloppspassagen (2) incommand airflow with up to the genome inpass passage (3) utvende avluften, vilken värmeväxlare (1) omfattar inloppsytor (10,11) och ut ) for airbags, och 10 - begränsning av strömningen i värmeväxlaren (1) vid behov, kännetecknat avatt 15. strömningen i värmeväxlaren (1) begränsas medelst varandra överlappande, i inlopps- (2) and utensils (3) with color transfer agents (1) Bada inloppsytor (10,11) anordnade strömbegränsningsskivor (14, 15), medellst vilka en del av var-meväxlarens (1) strömningsareal (A) kan reserveras för 20 utgaende strömning resp. self incommande strömning. • · * ·