FI117725B - Ventilation unit with heat pump - Google Patents

Description

117725

VENTILATION UNIT WITH HEAT PUMP

The invention relates to a ventilation device equipped with a heat pump comprising a heat exchanger for heating the first air flow, a heat exchanger for cooling the second air flow, a compressor connected to the heat exchangers, and fans maintaining said air flows.

As heaters, it is known to be equipped with a heat pump which, during the winter season, heats the air flow from the device by means of a heat pump condenser and cools the air flow leaving the building by means of a heat pump evaporator. During the summer, when there is a need for cooling, the heat pump unit is switched to a condenser coil as a heat pump evaporator and a steam / tin coil as a condenser. The connection is made by means of non-return valves connected to the refrigerant piping.

A disadvantage of the known solution described above is the complexity of the refrigerant pipelines and the increased leakage potential. Further, the compressor is located there adjacent to the condenser, whereby during the heating season, the warm compressor of the surface also releases heat to the air flow, which is a positive feature. But in the case of cooling in the summer, the above solution is a disadvantage, as the compressor heats the air flow, * * · • · · which should be cooled. This results in a reduction in cooling capacity. In addition t i * both heat exchangers must be provided with a condensate and / or defrost outlet ♦ · outlet and drain piping, since each heat exchanger operates in turn steam. ·· *. generators is.

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For a simpler and more reliable heat pump design, * * · ·. * · ·. developed a new ventilation unit, characterized by heat exchangers and compress * * * y. the grate is mounted on a movable base and the heat exchangers are at least partially partitioned * * * from one another, e.g. by means of a partition, wherein said base is movable first • · 1; a station in which the first flow is conducted through a heating heat exchanger • · *; · · [Through and a second flow through a cooling heat exchanger and to a second position where the flows of · · f '* * · are further conducted through said heat exchangers but interchangeably.

117725 i;

The ventilation machine according to the invention has the advantage that the heat pump can normally be used for heating and cooling without a change in the connection of the refrigerant piping.

Steam coil is always a cooling heat exchanger and only requires a dehumidification and / or de-icing system. The heat released by the compressor into the environment during winter time is utilized for heat recovery, and its heat during the summer time is not adversely affected by heating the cooling flow.

In the following, the invention will be explained in more detail with reference to the accompanying drawing, in which Figure 1 shows the structure of a ventilation device in the first position (winter).

Figure 2 shows the structure of the ventilation device in the second position (summer).

Figure 3 shows a rotatable substrate with its components.

Fig. 1 shows a ventilation device according to the invention arranged in a rectangular housing 7, the air duct connections of which are located on the housing. From the inside, exhaust air 1 is led from a single opening to the instrument and discharged as flow 2. In some cases, part of the exhaust air can naturally be recycled back into the building, e.g. The ventilation device is in the winter position, whereby the air flow shown in the device passes through the evaporator 11 and cools down, and the fan 5 is blown as a flow 2. out. The instrument has the necessary partitions for the flow to pass through the evaporator 11.

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In the second section of the apparatus, separated by a partition 13, there is a condenser coil 12 * * ·, and a compressor 8. The heated air flow 4 is led to this section of the apparatus where it passes through the condenser coil 12, warmed by the heat blowing in a heating flow 3 eg to the apartment.

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The design of the ventilation unit is simple when it is rectangular and divided into • mires. healing four blocks, all equipped with one duct.

• e ·· • * · • · • * • *; When changing the unit to cool the apartment, i.e. to change the flow 3 from the heating to the cooling, the component tray 9 is rotated by the motor 10 and the toothed wheel 16 connected to it so that the tray rotates half a turn. The chassis is also equipped with a · · • «***. The base 9 is then in the second position according to Fig. 2. The rotation of the base 9 ♦ · * * ·· on the base plate of the housing body can be facilitated by the wheels 15.

3 117725

Fig. 2 shows a device in the summer station, whereby the heat pump condenser 12 has been switched between the flows 1 and 2 as a heat exchanger. The exhaust air flow 1, 2 cools and condenses the heat pump in the refrigerant heat exchanger 12. The compressor 8 is also The airflow 4.3 to the apartment, which may also include recirculated air, now passes through the evaporator 11 which has passed under the flow connections and cools as it passes.

When the tray 9 has moved half a turn to the summer station (Fig. 2) inside the rectangular housing, the partitions 13 associated with the tray 9 are sealed to the inner surface of the housing to prevent leakage. The partitions 14 and 18 do not rotate and the fans 5 and 6 do not rotate. They are built into the upper part of the housing. The outer and upper edges of the partitions 13 and the evaporator 11 and condenser batteries 12 are sealed against the housing walls and against the lower edges of the partitions 14, 18 respectively.

Figure 3 shows a rotatable base unit, i.e. a heat pump with its components on the base 9. The shown structure is rotated half a turn when the heating is changed to cooling. In this solution, the fans are located at the top of the housing body 7 and do not rotate. It is also possible to connect the fans to the rotatable part shown in Fig. 3, which created them to rotate with the machine 9 on the base 9. In this case, the height of the housing body • · · • · * can be significantly reduced.

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Although, as an exemplary embodiment, rotary mode switching is cooled to *. ·· *. and vice versa, other displacements are also possible, such as linear displacement of the machine unit horizontally or vertically, whereby the different flow channels 1,2 and 3,4 are connected in turn to the cooling circuit and the heating circuit respectively.

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Claims (7)

1. A heat exchanger is provided with a heat pump, to which a heat exchanger (12) which heats first air flow (3, 4), a heat exchanger (11) that heats second air flow (1, 2), a compressor coupled to the heat exchanger (5) (6) which maintains said air currents, wherein the heat exchangers (11); (12) and compressoin (8) are mounted in the frame housing (7) of the apparatus on a movable support (9) and the heat exchangers are at least partially separated from each other for each other. for example, by means of a partition (13), said support being moved to the first position, where the first flow (3, 4) is conducted via the heating heat exchanger (12) and the second flow via the cooling heat exchanger, and to the second the position where the currents are further passed through said heat exchanger, but mutually characterized, characterized in that the fans (5); (6) which maintain the air currents are positioned above the movable support (9) in the frame housing (7) in its stable portion. 2. Air exchange apparatus according to claim 1, characterized in that the substrate • · * *. Rot · * (9) is adapted to be rotating, whereby the substrate (9) can be rotated between • · • · · ** * · the first and second positions. · · · · · · ··· 3. An air-exchange apparatus according to claim 1, characterized in that the compressor • · · ““ (8) lies on a removable base (9) in the compartment of the heating heat exchanger • · (12). ♦ • ♦ · * · · • ii 4. Air exchange apparatus according to claim 1, characterized in that the first position is intended for heating the air flow which exits from the air exchange zone in the apparatus and the second position for cooling the outgoing flow. • · »i • · · * · ί. * Air-exchange apparatus according to claim 1, characterized in that the support (9) is adapted to be rotating into the square frame housing (7). 6 117725 The air exchange apparatus according to claim 1, characterized in that the support (9) is divided into four sections, which are sealed to the inner surfaces of the frame housing (7). Air exchange apparatus according to claim 1, characterized in that the substrate can be rotated about its vertical axis and the air flow channels are connected to the sections of the substrate (9) above the substrate. * ··· • · · • 1 1 ... • · • · »•« «• 1 · ♦ i · · 1 • · · ♦ ·· • · · · · · •« · · · * · • ft1. ·· • · · - • · · • · · · · · · · · ··· ♦ · ·: - • · ·. . ♦ · · »· 1 • · - ♦ ·» · · «· · • · · ··· ·