FI105852B - Air conditioning method and supply air device for carrying out the process - Google Patents

Description

105852 Air Conditioning Method and Supply Air Device to Implement the Method • p

Background of the Invention

The invention relates to a method of air conditioning in which fresh air is introduced into the room to be heated via a radiator, and an inlet air device in connection with a radiator, which device is connected to an inlet duct arrangement of fresh air.

In order for the ventilation of buildings, and in particular the mechanical exhaust ventilation system, the intake of fresh supply air to function smoothly, that is to say, without cold draft, even in cold seasons, experience has shown that incoming supply air must be heated.

The necessary heating is done by a radiator, In order to do this, the supply air must be led to the radiator. In both new buildings and renovations, it is often the most economical way to supply the supply air through a radiator located under the window, utilizing wall-mounted ducts.

Such a method of heating the supply air is known in the art. Problems with old so-called. in fresh air radiator systems, it has been radiators have been specially made special products for this purpose, which due to the possible replacement and cleaning of the filter, are removable and thus relatively expensive due to their construction and small production volumes, or in order to avoid the opening of the radiator. The supply air box is only suitable for radiators that are not equipped with safety grilles, ie special radiators 25 have to be used in these areas as well. In addition, old fixed supply air box / radiator structures have encountered difficulties in their cleanability.

Existing fresh air radiators, such as those described in Fl patent application 982506, which have a separate and easily removable box structure for supply air located under the radiator, have overcome the above problems ;; 30 resolved. Thus, there are no longer any significant obstacles to the use of these fresh air radiators and their supply air supply.

* However, there is another major problem with ventilation and heating, namely heat losses, which should be further reduced due to constantly rising energy costs.

35 About 50% of the heat loss is due to conduction through the walls, roof and windows of the building, and the other about 50% of the warm air passing through the ventilation 2 105852. In most cases, ventilation is "too much" because ventilation design is based on generic standards that do not take into account the changing conditions of the room to be ventilated, that is, ventilation as needed. In this case, even the minimum settings for air conditioning may sometimes be too efficient and therefore not energy efficient.

Summary of the Invention

It is therefore an object of the invention to provide a method and a supply air device for implementing this method so that the above problems can be solved. This object is achieved by a method according to the invention, which is characterized essentially by adjusting the flow rate of fresh air depending on the parameters of the indoor air to be ventilated, and by a supply Color-15 Depending on the indoor air parameters in the air conditioner.

Most preferably, the amount of fresh air flow is controlled depending on the CO 2 concentration in the room to be ventilated. Generally, the reference value for a maximum room air C02 concentration is 1500 ppm, in which case the air can be said to be bad. Generally, air conditioning is considered to be necessary whenever the CO 2 -20 content is> 1000 ppm.

The invention is therefore based on the idea of using the generally known ideal indoor air parameters set for each condition to be ventilated to control fresh air coming through the radiator as needed. In other words, when there is no need for air conditioning, no fresh air flows through the radiator 25, and any heating in this situation can be achieved by heating the air already in the air condition, i.e. the recirculated air. While air conditioning is required when a room parameter exceeds the allowable values, the tramline eye is again controlled through the radiator. By radiator is meant a standard wall mounted radiator, not heat exchangers in connection with the air conditioners 30.

An advantage of the method and the supply air device according to the invention is that it is possible to reduce the heat loss of the room to be ventilated by up to 25%, thus up to 50% in the case of ventilation.

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List of figures

The invention will now be described in more detail by means of two exemplary embodiments with reference to the accompanying drawing, in which Fig. 1 is a perspective view of a supply air device according to the invention; Figure 3 is a side view of the radiator and supply air device of Figure 3.

DETAILED DESCRIPTION OF THE INVENTION

Referring to Figures 1 and 2, the radiator 1 shown therein comprises two radiator plates 1a and two internal convection plates 15 1b attached thereto. A supply air box 2 extending to a desired width is connected to the lower part of the radiator 1, which communicates with the fresh air inlet duct 5 in the wall 4 of the space 3 to be ventilated and which seals to the lower part of the radiator 1. Connected to the side edges 6 of the supply air box 2 are vertical walls 7 which are sealed to the convection dampers 1b and the inner walls of the radiator plates 1a and extend to the upper surface of the radiator 1 so that 1 from its outflow opening 9 on the upper surface.

This outflow opening 9 is provided with a shut-off device 10 which is: controllable between the opening and closing positions of the outflow opening 9, depending on the parameters of the indoor air in the airtight space 3. This parameter is most preferably a state 3 CO 2 concentration which should preferably not exceed 1000 ppm, at least 1500 ppm.

The closing device comprises, for example, a simple closing plate 11 fitted to the outflow opening 9 and a stepper motor 12 for turning the closing plate 11. The control system required to accomplish this is not shown, since there are many ways known in the art to implement it.

The radiator T shown in Figures 3 and 4 differs from the radiator of Figures 1 and 2 in that there is only one radiator plate 1a 'and convection damper 1b'. The supply air box 2 'extending to the desired width attached to the lower part of the radiator T differs from the above in that a rear plate 7a' is disposed between the rear edges of the vertical walls 7 'connected to its lateral sides 6'. from behind. In addition, inside the box 2 'is a baffle plate 2a' which initially guides the radiator 1 'from the supply air duct 5. The closure arrangement 10 ', 11', 12 'associated with the outflow opening 9' 5 of the channel 8 'corresponds to the above.

The operation of the method according to the invention and the radiator assembly is very simple. For example, if the room air heater 1,1 'is controlled by a CO 2 concentration of less than 1000 ppm, for example, the shutter 11, 11' can be closed so that no fresh air is supplied through the coil 1,1 '. In this case, of course, the il-10 to the mastable space 3 tends to enter replacement air along other paths, but not in the same amounts as through the radiator 1,1 '. In this case, a higher vacuum may also be created in the space 3, but this has no significant effect on the quality of the indoor air. However, heating is mainly effected by circulating indoor air at the heating surfaces 1,1 'outside the supply air device 2, 2'. However, when the set value is exceeded, the shut-off plate is partially or completely opened, allowing fresh air to flow through the radiator 1, T into space 3 again.

The above description of the invention is only intended to illustrate the basic idea of the invention. However, one of ordinary skill in the art can implement its details in several alternative ways within the scope of the appended claims. Thus, the method according to the invention can be implemented with radiators of other types of supply air devices or radiators of other construction. Further applications include e.g. The solutions disclosed in Fl patent 90914 and Fl patent application 990206, wherein fresh air is circulated through convection dampers so that it is first directed from top to bottom and then upward with the flow continuously in contact with the convection dampers. In this case, the supply air device must be modified in a manner suitable for each object so that fresh air can be introduced into the air-conditioned space in a controlled manner as described above. Of course, other parameters, such as temperature or relative humidity, can also be used to control the amount of fresh air flow in the indoor air.

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Claims (7)

105852 A method of air conditioning in which fresh air is introduced into the room to be ventilated via a radiator (1, 1 '), characterized in that the amount of fresh air is controlled depending on the parameters 5 of the indoor air in the room to be ventilated. A method according to claim 1, characterized in that the amount of fresh air flow is controlled in dependence on the CO 2 concentration in the room to be ventilated (3). Method according to Claim 2, characterized in that fresh air is introduced into the room (3) to be ventilated when the CO 2 content is> 1000 PPm. ------------------ Supply air device in connection with a radiator (1, 1 '), which device (2, 2') communicates with the fresh air inlet duct arrangement (5) and is intended to direct fresh air through the radiator surfaces to a condition (3). , 2 ') a shut-off device (10, 10') is provided in the outflow opening (9, 9 '), which is controllable between the opening and closing position of the outlet opening of the supply air device depending on the indoor air parameters. Supply air device according to claim 4, characterized in that said parameter of the condition (3) to be air-conditioned is a CO 2 concentration. Supply air device according to claim 4 or 5, characterized in that the outlet opening (9, 9 ') of the supply air device (2, 2') is located at the top of the radiator. Supply air device according to one of Claims 4 to 6, characterized in that the shut-off device (10, 10 ') comprises a shut-off plate (11, 11') and a stepper motor (12, 12 ') fitted in the outflow opening of the supply air device (2, 2'). to flip. · »-..... 1« »·» 105852