KR101394978B1 - Air conditioning apparatus - Google Patents

Abstract

The present invention relates to a complex air-conditioning apparatus combined both waste heat recovery and air circulation which includes a heating/cooling heat exchanger (1) for air conditioning, a heat exchanger (2) for waste heat recovery, a ventilating fan (F1), and an exhaust fan (F2) to simultaneously perform the air conditioning and the ventilation. The heat exchanger (2) for waste heat recovery is connected to a first supply pipe (17) connected to a circulation pipe (11), an outdoor air pipe (12), and the ventilation fan (F1), and a second supply pipe (18) connected to the exhaust fan (F2). The heating/cooling heat exchanger (1) is connected to a first air-conditioning pipe (13) connected to an air supply pipe (16) and the ventilation fan (F1), and a second air-conditioning pipe (14) connected to the exhaust fan (F2). The exhaust fan (F2) is connected to the exhaust fan (15), and the first supply pipe (17) is connected to the ventilation pipe (11). A first damper (D1) adjusts the inflow of the outdoor air to the heat exchanger (2) for waste heat recovery. A damper adjusts the flow of air to the second air-conditioning pipe (14) and the exhaust pipe (15) from the ventilation fan (F2), and a damper adjusts the flow of air between the first supply pipe (17) and the ventilation pipe (11). When the indoor air is circulated without inflow of the outdoor air, the ventilation fan (F1) and the exhaust fan (F2) are used to supply the air for the air condition.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a combined air-

More particularly, the present invention relates to a combined air-conditioning system for a waste heat recovery ventilation system, which comprises a cooling / heating heat exchanger, a waste heat recovery heat exchanger, an air conditioning fan and an exhaust fan, In the apparatus, the exhaust fan performs the air conditioning operation when necessary, thereby increasing the utilization rate of the fan provided in the apparatus and reducing the occurrence of noise during air conditioning due to the use of the large capacity air conditioning fan, And at the same time, precise control of the actual air volume is possible.

A composite air conditioner for combined use of waste heat recovery and ventilation has been developed which can simultaneously perform air conditioning and ventilation for a building while having a waste heat recovery function. Korean Patent Registration No. 10-0902502 discloses an example of a heat exchanger for ventilation use combined with waste heat recovery.

1 shows a schematic configuration diagram of a conventional combined heat and air-conditioning ventilation combined air-conditioning system. As shown in the figure, in the conventional composite heat exchanger for ventilation and heat recovery ventilation, (1) for heating and cooling (heating or cooling), and a waste heat recovery heat exchanger (2). An exhaust fan F2 for allowing the air (indoor air) from the room to be exhausted to the outside through the waste heat recovery heat exchanger 2 and an exhaust fan F2 for cooling the outside air passing through the waste heat recovery heat exchanger 2, And an air conditioning fan F1 is provided in the main body 10 so as to be supplied into the room through the air conditioner 1. The arrows shown by solid lines in FIG. 1 denote the ducts through which air flows, and they can be physically realized as ducts or pipes through which air can flow.

1, the indoor air is discharged to the outside through the waste heat recovery heat exchanger 2 along the path indicated by the solid line by the operation of the exhaust fan F2 in the conventional combined air-conditioning system for combined waste heat recovery and ventilation. On the other hand, the outside air passes through the waste heat recovery heat exchanger 2 along the path indicated by a dotted line by the operation of the air conditioning fan F1, and then is cooled or heated through the cooling / heating heat exchanger 1, As described above, in the conventional combined air-conditioning system for waste heat recovery and ventilation, the outside air is supplied to the room only by the operation of the air conditioning fan F1. Therefore, in order to supply sufficient air conditioning air to the building, The fan F1 must be provided.

However, it is difficult for the fan unit constituting the air conditioning fan (F1) or the exhaust fan (F2) to finely control the operation as the capacity, that is, the blowing capacity of the fan is increased. That is, it is difficult to precisely fine-tune the rotation speed of the fan in accordance with the capacity actually required as the fan apparatus of a large capacity. Therefore, there are many cases where the fan rotates faster than the actual required capacity and the energy is consumed more.

In addition, a large-capacity air conditioner fan (F1) is installed on the basis of the maximum heating and cooling demand of the building, but the frequency of actually heating and heating the building to the maximum is very low. Nevertheless, since a large-capacity air conditioning fan F1 is required, there is a problem that the initial installation cost is increased. In addition, when the demand for cooling and heating the building is small, the fan rotation speed of the large-capacity air-conditioning fan F1 can be made low. However, when the large-capacity air conditioning fan F1 is operated at a low speed, And it is disadvantageous in that the rotation noise due to the rotation of the fan is also large.

See Korean Patent Registration No. 10-0902502 (published on June 15, 2009).

The present invention relates to a composite air conditioner for combined use of ventilation and heat recovery, which is capable of simultaneously performing air conditioning and ventilation, aims at enhancing the utilization rate of the fan provided in the main body of the apparatus, reducing noise during air conditioning, .

Specifically, the present invention reduces the size of the air conditioner fan while satisfying the required air conditioner air volume (air volume for cooling and heating) and the ventilation air amount, thereby reducing noise during air conditioning and unnecessary initial installation cost due to installation of large capacity air conditioner fan The present invention has been made to solve the above problems, and it is an object of the present invention to provide a combined air-conditioning system for a waste heat recovery ventilation system which can precisely control the degree of operation of a fan in accordance with a required air volume and also prevent unnecessary energy consumption.

In order to achieve the above object, according to the present invention, there is provided a cooling / heating heat exchanger for air conditioning, a waste heat recovery heat exchanger, an air conditioning fan and an exhaust fan, Wherein the waste heat recovery heat exchanger is connected to a vent pipe, an outer pipe, a first pipe connected to the air conditioning fan, and a second pipe connected to the exhaust pipe, respectively; The cooling / heating heat exchanger is connected to the air supply pipe, the first air conditioning pipe connected to the air conditioning fan, and the second air conditioning pipe connected to the exhaust fan, respectively; An exhaust pipe connected to the exhaust fan; The first supply pipe is connected to the vent pipe; A damper for adjusting the flow of air from the exhaust fan to the second air conditioning pipe and the exhaust pipe, and a damper for regulating air flow between the first supply pipe and the ventilation pipe A damper is provided; The air conditioning fan and the exhaust fan can both be used for air supply by air conditioning when indoor air is circulated without inflow of outside air.

In the combined air-conditioning system for combined use with a waste heat recovering ventilator according to the present invention, both the air-conditioning fan and the exhaust fan can be used for air conditioning (cooling and heating), if necessary. That is, according to the present invention, it is possible to supply a large amount of air to the room by connecting a small-capacity fan, that is, a small-capacity air-conditioning fan and an exhaust fan in parallel, without using a large-capacity air- The noise caused by the operation of the fan can be reduced.

In addition, in the case of controlling the air flow rate in accordance with the indoor or indoor environment at the time of cooling, heating and ventilation of a building, in the combined air conditioning apparatus for combined use with a ventilation heat recovery ventilator according to the present invention, So that the range and accuracy of controlling the air volume can be increased and the air volume can be finely adjusted in controlling the air volume and thus unnecessary energy consumption can be prevented Effect is exerted.

Further, according to the present invention, an unnecessary initial installation cost due to installation of the large-capacity air conditioning fan can be reduced.

1 is a schematic diagram of a conventional hybrid air-conditioning system for ventilation of waste heat recovery.
FIG. 2 is a schematic configuration diagram of a combined air-conditioning system for ventilation of waste heat according to the present invention.
3 to 5 are schematic diagrams showing various operation modes of the combined air conditioning system for ventilation and heat recovery according to the present invention shown in FIG.
FIG. 6 is a schematic view showing a case in which the combined heat and air conditioning ventilation unit for ventilation and heat recovery according to the present invention having a configuration in which the second supply pipe and the ventilation pipe are not directly connected operates in the operation mode corresponding to FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Although the present invention has been described with reference to the embodiments shown in the drawings, it is to be understood that the technical idea of the present invention and its essential structure and operation are not limited thereby.

FIG. 2 is a schematic block diagram of a combined air-conditioning system for ventilation and heat recovery of waste heat according to the present invention. The arrows shown by solid lines in FIG. 2 represent the channel through which the air flows, and can be realized by conduits or ducts through which air can flow physically.

As shown in the figure, a combined air-conditioning apparatus for combined use with a waste heat recovering ventilator according to the present invention includes a main body 10. Inside the main body 10, an air conditioning heat exchanger 1 and a waste heat recovery heat exchanger 2 . The main body 10 is also provided with an air conditioning fan F1 that is supplied from the outside to allow the outside air passing through the waste heat recovery heat exchanger 2 to be supplied to the room through the cooling / heating heat exchanger 1. Further, , The indoor air is supplied to the room through the waste heat recovery heat exchanger (2) and the air conditioning heat and cold water heat exchanger (1) in sequence, or exhausted to the outside without passing through the air conditioning heat and cold water heat exchanger (1) (F2) is provided in the main body (10).

The waste heat recovering heat exchanger 2 itself is well known and the waste heat recovering heat exchanger 2 is provided with a ventilation pipe 11 into which room air flows and an outer pipe 12 Respectively. And a first damper D1 for regulating the flow of outside air to the waste heat recovering heat exchanger 2 through the external orifice 12 is provided.

The cooling / heating heat exchanger 1 is a known device for air conditioning, i.e., cooling and heating, and cooling or heating the air to be contacted. The cooling / heating heat exchanger 1 may be constituted by, for example, a coil or the like capable of flowing a coolant or varying the flow of hot water if necessary, but is not limited thereto and may be configured in various known forms.

The cooling / heating heat exchanger 1 is connected to an air supply pipe 16 for supplying air to the room. On the other hand, a first air conditioning pipe 13 for allowing air to flow from the air conditioning fan F1, And a second air conditioning pipe (14) for allowing air to flow from the exhaust fan (F2) are connected to the cooling / heating heat exchanger (1), respectively.

The air conditioning fan F1 is connected to the heating / cooling exchanger 1 through the first air conditioning pipe 13 as described above, and on the other hand, to the waste heat recovery heat exchanger 2 via the first supply pipe 17 do. The exhaust fan F2 is connected to the cooling / heating exchanger 1 through the second air conditioning pipe 14 as described above, and on the other hand, to the waste heat recovery heat exchanger 2 via the second supply pipe 18 do. An exhaust pipe 15 for discharging air to the outside is connected to the exhaust fan F2. The exhaust pipe 15 may be formed as a separate conduit from the second air conditioning pipe 14. However, as illustrated in the figure, one pipe is extended from the exhaust fan F2, and the second air pipe 14 and the exhaust pipe (15). A second damper D2 and a third damper D3 for controlling the air flow to the exhaust pipe 15 and the second air conditioning pipe 14 may be provided separately from each other. When the exhaust pipe 14 and the exhaust pipe 15 are branched, only one damper is provided at the branching portion so as to control the air flow to the exhaust pipe 15 and the second air conditioning pipe 14 alternately have.

In the present invention, the first supply pipe 17 is connected to the ventilation pipe 11. The first supply pipe 17 is connected to the first supply pipe 17 and the ventilation pipe 11 for connection to the ventilation pipe 11, There is a first connection pipe 19a.

The second supply pipe 18 may also be connected to the ventilation pipe 11. In this case, a separate pipe is provided between the ventilation pipe 11 and the second supply pipe 18 so that the ventilation pipe 11 and the second supply pipe 18 The second connection pipe 19b may be provided between the first supply pipe 17 and the second supply pipe 18 so that the first connection pipe 19a and the second connection pipe 19b may be directly connected to each other, And the second supply pipe 18 and the vent pipe 11 may be connected to each other by a connection pipe 19b. However, the second supply pipe 18 and the vent pipe 11 do not necessarily have to be connected to each other. This will be described later.

Meanwhile, a fourth damper D4 may be provided to control the air flow to the first connection pipe 19a. It is also possible to provide a separate channel between the ventilation pipe 11 and the second supply pipe 18 so as to directly connect the ventilation pipe 11 and the second supply pipe 18 or to connect the first supply pipe 17 and the second supply pipe 18 An additional fifth damper D5 may be further provided to control the flow of air from the ventilation pipe 11 to the second supply pipe 18 when the second connection pipe 19b is connected to the second connection pipe 19b. Although the fifth damper D5 is illustrated as being installed in the second connection pipe 19b in the embodiment shown in the drawing, the connection between the ventilation pipe 11 and the second supply pipe 18 A fifth damper D5 may be installed on a separate conduit between the ventilation pipe 11 and the second supply pipe 18 when a separate conduit is provided between the second conduits 18. That is, in the present invention, the second supply pipe 18 and the ventilation pipe 11 may be connected so that air can flow therethrough. In this case, on the air flow path of the ventilation pipe 11 and the second supply pipe 18, (D5) may be provided. However, as will be described later, the fifth damper D5 is also unnecessary when direct air flow between the second supply pipe 18 and the ventilation pipe 11 is not required.

3 to 5, the operation state of the combined air conditioning system for ventilation and heat recovery according to the present invention having the above-described structure will be described. The thick solid lines in FIGS. 3 to 5 show paths through which the room air flows, and the thick dotted lines show the paths through which the outside air flows.

Fig. 3 is a schematic view corresponding to Fig. 2 showing the air flow when the cooling and heating operation together with the ventilation operation of the indoor and outdoor air are performed together. The ventilation fan F1 and the ventilation fan F2 are operated and the indoor air is exhausted through the ventilation pipe 11 and the outer orifice 12, After the air and the outside air enter the waste heat recovery heat exchanger 2 and pass through the waste heat recovery heat exchanger 2 while exchanging heat with each other, the outside air is cooled or heated through the cooling and heating heat exchanger 1, And the indoor air is discharged to the outside through the exhaust pipe 15. [ That is, the indoor air is discharged to the outside through the ventilation pipe 11, the waste heat recovery heat exchanger 2, the second supply pipe 18, the exhaust fan F2 and the exhaust pipe 15 in sequence, The waste heat recovery heat exchanger 2, the first supply pipe 17, the air conditioning fan F1, the cooling and heating heat exchanger 1 and the air supply pipe 16 are sequentially supplied to the room. At this time, direct air flow from the ventilation pipe 11 to the first supply pipe 17 and the second supply pipe 18 is blocked. That is, the first damper D1 and the second damper D2 are opened, and the third damper D3 and the fourth damper D4 are closed. A separate duct is provided between the ventilation pipe 11 and the second supply pipe 18 so as to directly connect the ventilation pipe 11 and the second supply pipe 18. The ventilation pipe 11 and the second supply pipe 18, The fifth damper D5 is also closed for the same operation as in Fig.

  In the case of the winter season and the summer season, it may be necessary to circulate indoor air only without inflow of outside air. Fig. 4 is a schematic view corresponding to Fig. 2 showing the air flow when the indoor air is cooled or heated, Are shown. 4, the air conditioning fan F1 and the exhaust fan F2 are all operated only for air supply by air conditioning when the indoor air is circulated indoors without inflow of outside air and without external exhaust of indoor air . 3, the exhaust fan F2 is used to exhaust room air, but in the case of FIG. 4, the exhaust fan F2 also operates for air conditioning.

Concretely, the room air introduced into the ventilation pipe 11 is supplied to both the air-conditioning fan F1 and the exhaust fan F2, and the room air is supplied to the air-conditioning heat exchanger F2 by the operation of the air conditioning fan F1 and the exhaust fan F2. (1), and then supplied to the room through the air supply pipe (16). That is, the room air introduced into the ventilation pipe 11 is cooled or heated through the cooling / heating heat exchanger 1 by the operation of the air conditioning fan F1, and then supplied to the room through the air supply duct 16. At this time, since the exhaust fan F2 also operates for the indoor air supply through the air conditioning, a part of the room air introduced into the ventilation pipe 11 is also cooled through the cooling / heating heat exchanger 1 by the operation of the exhaust fan F2 Or heated and then supplied to the room through the air supply duct 16. That is, the room air is supplied to the room through the ventilation pipe 11, the first connection pipe 19a, the first supply pipe 17, the air conditioning fan F1, the cooling and heating heat exchanger 1 and the air supply pipe 16 sequentially The second connection pipe 19b, the second supply pipe 18, the exhaust fan F2, the cooling and heating heat exchanger 1, and the air supply pipe 16 are connected to the exhaust pipe 11, the first connection pipe 19a, the second connection pipe 19b, And it is supplied to the room through sequentially. At this time, the third damper D3, the fourth damper D4, and the fifth damper D5 are opened, and the first damper D1 and the second damper D2 are closed.

5, the waste heat is recovered from the exhaust to the outside, and at the same time, the fresh air is cooled and heated at a temperature set by the user, and the air flow when the air is supplied to the room is examined. Fig. 5 is a schematic view corresponding to Fig. 2 showing the air flow when the waste heat is recovered from the exhaust to the outside and the fresh outside air is cooled and heated at a user-defined temperature and supplied to the room. 5, a part of the room air flowing into the ventilation pipe 11 is supplied to the cooling / heating heat exchanger 1 by the air conditioning fan F1 without passing through the waste heat recovery heat exchanger 2, Cooled or heated, and then supplied to the room.

Concretely, the outside air is supplied to the room through the external engine 12, the waste heat recovery heat exchanger 2, the first supply pipe 17, the air conditioning fan F1, the cooling and heating heat exchanger 1, do. The indoor air is introduced into the ventilation pipe 11. A part of the room air introduced into the ventilation pipe 11 flows into the waste heat recovery heat exchanger 2, the second supply pipe 18, the exhaust fan F2, The first connection pipe 19a, the first supply pipe 17, the air-conditioning fan F1, the air-conditioning fan F2, and the air-conditioning fan F3 are sequentially discharged to the outside through the ventilation pipe 11, Heating / heating heat exchanger 1 and the air supply / exhaust pipe 16 are sequentially supplied to the room. At this time, the first damper D1, the second damper D2, and the fourth damper D4 are opened, and the third damper D3 is closed.

In the above description, the second supply pipe 18 may be connected to the vent pipe 11 by a pipe line or may be connected to the vent pipe 11 by a first connection pipe 19a and a second connection pipe 19b In this case, a separate channel is provided between the ventilation pipe 11 and the second supply pipe 18 to directly connect the ventilation pipe 11 and the second supply pipe 18. However, in the present invention, the second supply pipe 18 And the ventilation pipe 11 do not necessarily have to be connected to each other through the pipeline. 6 is a sectional view showing the structure of the air conditioning fan F1 and the exhaust fan 11 as in the case of FIG. 4, in which the second supply pipe 18 is connected to the ventilation pipe 11 only through the waste heat recovery heat exchanger 2, F2 are all operated only for air supply by air conditioning. In the case of the configuration in which the second supply pipe 18 is connected to the ventilation pipe 11 only through the waste heat recovery heat exchanger 2 instead of directly connected to the pipe as in the case of FIG. 6, the second connection pipe 19b and the 5 No damper (D5) exists. Accordingly, a part of the room air introduced into the ventilation pipe 11 is cooled or heated through the cooling / heating heat exchanger 1 by the operation of the air conditioning fan F1, and then supplied to the room through the air supply pipe 16. That is, a part of the room air introduced into the ventilation pipe 11 is supplied to the ventilation pipe 11, the first connection pipe 19a, the first supply pipe 17, the air conditioning fan F1, the cooling / heating heat exchanger 1, 16 are sequentially supplied to the inside of the room. Part of the room air introduced into the ventilation pipe 11 is cooled or heated through the cooling / heating heat exchanger 1, and then is supplied to the second supply pipe 18 And the exhaust fan F2 are successively cooled or heated by the cooling and heating heat exchanger 1 and then supplied to the room through the air supply pipe 16. [

As described above, in the combined air-conditioning system for combined use with a waste heat recovering ventilator according to the present invention, the exhaust fan F2 is cooled by the cooling / heating heat exchanger 1, (Refer to Figs. 4 and 6, and the related description). In other words, the exhaust fan F2 can be used for the air conditioning as required by the air conditioning fan F1. Therefore, the capacity and the size of the air conditioning fan F1 for circulating air conditioning can be greatly reduced . Therefore, according to the present invention, unlike the related art and the related art, a large-capacity air-conditioning fan is not used, and noise caused by the use of a large-capacity air-conditioning fan can be reduced.

Further, in the combined air-conditioning system for combined use with waste heat recovery ventilation according to the present invention, it is sufficient to use a small-capacity air-conditioning fan as compared with the conventional technology. Therefore, when the building is cooled, heated, or ventilated, The range and precision in which the air volume can be controlled can be increased, the air volume can be finely adjusted, and unnecessary energy consumption can be prevented. Further, since the present invention does not require a large-capacity air-conditioning fan, it is possible to reduce the unnecessary initial installation cost due to the installation of the large-capacity air-conditioning fan.

1: Heating / cooling heat exchanger
2: waste heat recovery heat exchanger
F1: Air conditioning fan
F2: Exhaust fan

Claims (4)

A waste heat recovery heat exchanger 2, an air conditioning fan F1 and an exhaust fan F2 are provided inside the main body 10 to perform air conditioning and ventilation at the same time, A combined air-conditioning system for ventilation,
The waste heat recovery heat exchanger 2 is provided with a vent pipe 11, an outer pipe 12, a first supply pipe 17 connected to the air conditioning fan F1, and a second supply pipe 18 connected to the exhaust fan F2. Respectively;
The cooling and heating heat exchanger 1 is connected to the air supply pipe 16, the first air conditioning pipe 13 connected to the air conditioning fan F1 and the second air conditioning pipe 14 connected to the exhaust fan F2, Have;
An exhaust pipe (15) is connected to the exhaust fan (F2);
The first supply pipe (17) is connected to the vent pipe (11);
A first damper D1 for regulating the flow of ambient air to the waste heat recovering heat exchanger 2 and a second damper D1 for regulating air flow from the exhaust fan F2 to the second air conditioning pipe 14 and the exhaust pipe 15 And a damper for adjusting the air flow between the first supply pipe (17) and the ventilation pipe (11);
Wherein both the air conditioning fan (F1) and the exhaust fan (F2) can be used for air supply by air conditioning when only indoor air is circulated without inflow of outside air. The method according to claim 1,
The exhaust pipe (15) and the second air conditioning pipe (14) are formed as separate pipes;
The damper for controlling the air flow from the exhaust fan F2 to the second air conditioning pipe 14 and the exhaust pipe 15 controls the air flow from the exhaust fan F2 to the exhaust pipe 15 And a third damper (D3) for controlling a flow of air from the exhaust fan (F2) to the second air conditioning pipe (14). The air conditioning system according to claim 1, Device. The method according to claim 1,
The second air conditioning pipe 14 and the exhaust pipe 15 are branched from one duct extending from the exhaust fan F2 and only one damper is provided at the branching portion so that the exhaust pipe 15 and the second air- (14) is controlled by alternately controlling the air flow to the indoor heat exchanger (14). 4. The method according to any one of claims 1 to 3,
The second supply pipe (18) and the vent pipe (11) are connected to allow air to flow;
And a fifth damper (D5) is provided on the air flow path of the ventilation pipe (11) and the second supply pipe (18).

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