WO2012157923A2

WO2012157923A2 - Air conditioner using cooling/dehumidifying energy recovery technology

Info

Publication number: WO2012157923A2
Application number: PCT/KR2012/003763
Authority: WO
Inventors: 유성연; 윤홍익
Original assignee: 충남대학교산학협력단; (주)가교테크
Priority date: 2011-05-19
Filing date: 2012-05-14
Publication date: 2012-11-22
Also published as: WO2012157923A3; KR20120129328A; US20140102689A1; KR101240512B1

Abstract

The present invention relates to an air conditioner. The air conditioner includes: a main body (10) having an intake hole (11) and a discharge hole (12); a heat exchanger (20) disposed within the main body (10) and installed downstream from the intake hole (11); a cooling coil (30) disposed within the main body (10) and installed downstream from the heat exchanger (20); a fan (40) disposed within the main body (10) and installed downstream from the cooling coil (30) to exhaust air within the main body (10) to an indoor space; and air passages (13a, 13b, 13c, and 13d) for introducing air passing through the cooling coil (30) again into the heat exchanger (20). Thus, according to the present invention, cooling/dehumidifying energy may be recovered from cooled air to prevent a cold draft from occurring and improve energy usage efficiency.

Description

Air conditioner using cooling / dehumidification heat recovery technology

The present invention relates to an air conditioner using a cooling / dehumidification heat recovery technology, and more particularly, to an air conditioner having a heat exchanger installed therein to thereby recover cooling / dehumidification heat.

The air conditioner used to cool the indoors in summer is composed of an indoor unit and an outdoor unit, and the indoor unit includes an inlet 101, a cooling coil 110, a fan 120, and an outlet 102 as shown in FIG. 1. As a structure to be installed, the indoor air is sucked from the indoor air intake port 101 formed in the lower part of the indoor unit 100 to cool the sucked air through the cooling coil 110, and then the cooled air is blown or a fan. It is supplied to the room 120 through the discharge port 102 provided in the upper portion of the indoor unit (100).

At this time, the air drawn into the indoor unit through the indoor air inlet 101 is cooled / dehumidified to below the saturation temperature while passing through the cooling coil 110, and is discharged to the room. The indoor dweller may then experience discomfort, the so-called Cold Draft.

In addition, when the humidity is high in the air, such as a rainy day dehumidification is not enough, there is a problem that it is difficult to adjust the temperature and humidity at the same time.

In addition, the surface of the cooling coil installed inside the indoor unit is condensed by condensed water while the indoor air is cooled. The conventional air conditioner is attached to the surface of the cooling coil because the cooling air discharged from the cooling coil forms an upward airflow. Since the condensed water does not fall naturally due to gravity but stays in place by the suction force of the blower fan, the surface of the cooling coil is wet, which causes a problem that the cooling efficiency of the cooling coil is lowered.

The present invention has been made to solve the problems of the conventional air conditioner as described above, the present invention is to provide an air conditioner that can prevent cold draft and at the same time increase the cooling efficiency and save energy.

And another object of the present invention to provide an air conditioner that can finely and finely control the temperature and humidity of the air discharged into the room.

Air conditioner according to the object of the present invention as described above, and the main body is formed with the inlet and outlet; A heat exchanger provided downstream of the suction port; A cooling coil installed downstream of the heat exchanger; A fan located downstream of the cooling coil and discharging air inside the main body to the room; The air passing through the cooling coil is characterized in that consisting of an air passage to be re-introduced into the heat exchanger.

In another aspect, the present invention is characterized in that the damper is provided that can be opened and closed in the air passage so that a portion of the air passing through the cooling coil flows directly into the fan.

The present invention prevents cold draft by installing a heat exchanger in front of the cooling coil of the air conditioner so that the air cooled / dehumidified by the cooling coil is heated and supplied again by the air drawn from the room, and at the same time, the air drawn from the room is It can be cooled by air cooled / dehumidified by the cooling coil, thereby saving energy required for cooling / dehumidifying and reheating.

In addition, the air conditioner of the present invention is further provided with a damper capable of bypassing air, and if necessary, the supercooled air can be bypassed through the damper, so that it can be properly mixed with the reheated air after cooling / dehumidification and supplied indoors. The temperature and humidity of the discharged air can be finely and precisely controlled.

In addition, in the present invention, since the air passing through the cooling coil forms a downdraft along the vertically formed air passage, condensate attached to the surface of the cooling coil together with gravity is efficiently removed. It is possible to prevent the decrease in cooling efficiency due to the wet surface.

1 is a cross-sectional view showing a structure of a conventional air conditioner,

Figure 2 is a cross-sectional view showing a first embodiment of the air conditioner using the cooling / dehumidification heat recovery technology according to the present invention,

3 is a configuration diagram showing a heat exchanger of FIG.

4 is a cross-sectional view showing a second embodiment of the air conditioner using a cooling / dehumidification heat recovery technology according to the present invention;

5 is a configuration diagram showing a heat exchanger of FIG.

6 is a cross-sectional view showing a third embodiment of the air conditioner using a cooling / dehumidifying heat recovery technology according to the present invention;

7 is a cross-sectional view showing a fourth embodiment of the air conditioner using a cooling / dehumidification heat recovery technology according to the present invention;

8 is a configuration diagram illustrating the heat exchanger of FIG. 7.

10: main body 11: inlet

12:

outlet

13a, 13b, 13c, 13d: air passage

14: plate 20: heat exchanger

20A, 20A ': first

heat exchanger plate

20B, 20B': second heat exchanger plate

21A, 21B:

Heat exchanger inlet

22A, 22B: Heat exchanger exhaust

30: cooling coil 31: damper

40: fan

Hereinafter, the specific configuration of the present invention will be described in more detail with reference to the accompanying drawings.

The present invention relates to an air conditioner to save energy by allowing the air introduced into the air conditioner through the inlet and the air cooled / dehumidified by the cooling coil to exchange heat with each other by a heat exchanger installed inside the air conditioner. As shown in FIG. 2, a heat exchanger 20, a cooling coil 30, and a fan 40 are sequentially installed along the air flow direction in the air conditioner main body 10 of the present invention, and upstream of the heat exchanger 20. The indoor air inlet 11 is provided at the side, and the indoor air is introduced from the indoor air inlet 11, and the indoor air outlet 12 is provided at the outlet of the fan 40, through the indoor air outlet 12. The air introduced from the indoor air inlet 11 is cooled / dehumidified and then discharged into the room.

The main body 10 is for installing a heat exchanger 20, a cooling coil 30, and a fan 40, which will be described later, in which a hollow part is formed, and the main body 10 sucks outside air. Inlet 11 for the discharge and discharge port 12 for discharging the cooled air to the room is provided respectively.

In the present invention, the inlet 11 and the outlet 12 provided in the main body 10 may be formed at any one position of the front, rear or side of the main body 10, accordingly, the interior of the main body 10 The heat exchanger 20 and the cooling coil 30 which are located at the same are also arranged differently, which will be described below as one embodiment.

In the first embodiment, as shown in FIG. 2, both the inlet port 11 and the outlet port 12 are formed on the front surface of the main body 10, and the heat exchanger 20 and the cooling coil 30 are downstream of the inlet port 11. It is located in this order, and relates to a structure in which a separate air passage (13a) is provided on the downstream side of the cooling coil (30).

The heat exchanger 20 located on the downstream side of the inlet 11 is configured to precool the air introduced by heat-exchanging the air introduced into the body 10 and the cooled air with each other, and ultimately improve the cooling efficiency. The structure is a laminated plate heat exchanger in which plate-shaped first and second

heat exchange plates

20A and 20B are alternately stacked as shown in FIG. 3, and each of the first and second

heat exchange plates

20A and 20B The heat exchanger intake and

exhaust mechanisms

21A, 21B, 22A, and 22B are formed such that the air passing through the heat exchanger 20 flows in a cross flow with each other.

That is, as shown in FIG. 3, the heat exchanger inlet port 21A and the heat exchanger exhaust port 22A are formed on the left and right sides of the first heat exchanger plate 20A, respectively, and the heat exchanger inlet port 21B is provided on the second heat exchanger plate 20B. ) And the heat exchanger exhaust port 22B are formed in a direction orthogonal to the heat exchanger intake and

exhaust openings

21A and 22A of the first heat exchanger plate 20A, that is, up and down, whereby the air introduced through the inlet 11 is first The air is introduced into the cooling coil 30 through the heat exchange plate 20A, and the air passing through the cooling coil 30 is discharged to the outlet 12 through the second heat exchange plate 20B again so that the air inside the heat exchanger is mutually different. It flows while forming a cross flow.

In this case, when the material of the first and second

heat exchange plates

20A and 20B is made of plastic, it is easier to form and change the position of the heat exchanger intake and

exhaust openings

21A, 21B, 22A, and 22B than the metal material. Therefore, it is preferable that the heat exchanger used for this invention is a heat exchanger made of plastics.

A cooling coil 30 is located downstream of the heat exchanger 20, and a circulating refrigerant flows inside the cooling coil 30.

And an air passage is formed between the rear of the main body 10 and the cooling coil 30, and the lower portion of the cooling coil 30 and the heat exchanger 20 to form a "b" shaped air passage (13a) As a result, the air passing through the cooling coil 30 again flows into the heat exchanger 20.

The fan 40 is positioned at the upper portion of the heat exchanger 20 and the cooling coil 30, whereby the air passing through the heat exchanger 20, the cooling coil 30, and the air passage 13a is sequentially sucked, It is discharged to the room through the discharge port 12 located downstream of the fan 40.

In the air conditioner of the present invention, the indoor air introduced into the main body 10 through the inlet 11 by the structure and arrangement as described above is introduced into the open side of the heat exchanger 20, and then inside the heat exchanger 20. After being first cooled by the cooled / dehumidified air flowing along the neighboring layer while flowing, the secondary cooled air is passed through the cooling coil 30, and the secondary cooled air is passed through the air passage 13a. After being attracted to the (20) side, it is drawn back to the lower part of the heat exchanger 20 and heated by indoor air while flowing inside the heat exchanger 20, and the heated air is discharged through the upper part of the heat exchanger 20 The fan 40 is discharged into the room through the discharge port 12.

Therefore, by installing a heat exchanger in front of the cooling coil, the air cooled / dehumidified by the cooling coil is heated and supplied again by the air drawn from the room, thereby preventing cold draft, and at the same time, the air drawn from the room is prevented by the cooling coil. It can be cooled by cooled / dehumidified air to save the energy needed to cool / dehumidify and reheat.

In addition, the conventional air conditioner is condensed while indoor air is cooled and attached to the surface of the cooling coil 30. At this time, the air is formed by the fan 40, and thus the air conditioner is attached to the surface of the cooling coil 30. Since the condensed water does not fall naturally due to gravity and stays in place for a while by the suction force of the fan 40, the surface of the cooling coil 30 is wet, which causes a problem that the cooling efficiency is sharply lowered. Since air flows on the outlet side of the cooling coil 30 while forming a downward air flow, condensate attached to the surface of the cooling coil 30 together with gravity is efficiently removed, thereby removing the surface of the cooling coil 30 from the condensate. As a result, a decrease in cooling efficiency due to wet is prevented.

On the other hand, the air passage (13a) is a damper so that some of the air passing through the cooling coil 30 can be directly supplied to the fan 40 without being reheated by heat exchange with the indoor air drawn from the inlet passage (11). 31 may be further provided.

That is, when the air passage is configured such that the air cooled by the cooling coil 30 passes through the heat exchanger 20 again, it is difficult to properly control the temperature and humidity of the air discharged to the room, and thus cooling Part of the air passed through the coil 30 is directly introduced into the fan 40 through the damper 31, and then the heat exchanger 20 is mixed with the rough air again to properly control the temperature and humidity of the air. .

In this case, it is preferable that the opening amount or opening / closing of the damper 31 can be controlled according to the detected value of the temperature and humidity sensor installed inside the main body 10.

To this end, the controller of the damper 31 and a temperature and humidity sensor (not shown) are connected and configured to automatically adjust the opening degree of the damper 31 by the controller according to the temperature and humidity detected from the temperature and humidity sensor, and the user's set temperature and humidity. In order to control the supply of cooling air finely and precisely.

In the second embodiment, as shown in FIG. 4, the inlet 11 for sucking indoor air is formed at the rear of the main body 10, and the outlet 12 for discharging the cooled air to the room is the front of the main body 10. The present invention relates to an air conditioner having a structure in which the heat exchanger 20, the cooling coil 30, and the air passage 13b are identical to each other except that the installation positions thereof are the same as those of the first embodiment. That is, in the second embodiment, the inlet 11 is formed on the rear surface of the main body 10, and the heat exchanger 20 and the cooling coil 30 are sequentially located downstream of the inlet 11, and the main body 10 An air passage is formed between the front surface and the cooling coil 30, and below the cooling coil 30 and the heat exchanger 20, respectively, resulting in an air passage 13b having an inverted " b " shape. . In addition, a damper 31 may be further provided at an upper portion of the air passage 13b.

Therefore, the direction in which air is discharged after being introduced into the main body 10 is opposite to that of the first embodiment, and accordingly, the heat exchanger intake port 21A formed in the first heat exchanger plate 20A used in the heat exchanger 20 is thus provided. And the position of the heat exchanger exhaust port 22A is also formed as opposed to the first embodiment as shown in FIG.

As described above, in the second embodiment, since the inlet 11 and the outlet 12 are respectively located at the rear and the front of the main body 10, the inlet port is sucked by the suction force of the fan in the process of discharging the cooled air to the outlet 12. Through the (11) it is prevented to flow directly into the main body 10 directly.

Embodiment 3 relates to an air conditioner in which the inlet 11 is formed on both sides of the main body 10 as shown in FIG. 6, and unlike the first embodiment, the inlet 11 is located at the side of the main body 10. Except for the rest of the configuration, that is, the heat exchanger 20, the cooling coil 30 and the air passage (13c) is the same as in the first embodiment.

As such, when the inlet 11 is positioned at the side of the main body 10, the cooled air flows directly into the main body 10 again through the inlet 11 by the suction force of the fan while the cooled air is discharged to the outlet 12. Phenomenon is prevented.

Embodiment 4 relates to an air conditioner in which the inlet 11 is formed at the lower part of the front surface of the main body 10 or the lower part of both sides as shown in FIG. 7.

The heat exchanger 20 is located inside the rear of the body 10, as shown in Figure 7, the cooling coil 30 is a heat exchanger so that the air passing through the heat exchanger 20 passes through the cooling coil 30 It is located at the front side (downstream side) of the 20.

In addition, an air passage 13d is formed between the cooling coil 30 and the front surface of the main body 10, wherein the lower portion of the air passage 13d is separated by a plate 14 installed at the lower end of the cooling coil 30. As a result, the air passing through the air passage 13d is not introduced into the inlet 11.

In addition, a damper 31 may be further provided on the upper side of the air passage 13d so that some of the air passing through the cooling coil 30 passes directly to the fan 40 without passing through the heat exchanger. It can be supplied, and the opening degree control method of the damper 31 is also as described in the first embodiment.

Embodiment 4 is the indoor air introduced into the main body 10 through the inlet 11 by the structure and arrangement as described above is introduced through the lower end of the heat exchanger 20, and then through the heat exchanger 20 inside After passing through the cooling coil 30, it passes through the cooling coil 30 again along the vertical air passage 13d, flows back into the heat exchanger 20, and then flows to the fan 40 installed downstream thereof. It is sucked by and discharged toward the outlet 12.

At this time, the heat exchanger intake port 21A and the heat exchanger exhaust port 22A are respectively disposed on the lower surface and the side of the first heat exchanger plate 20A 'constituting the heat exchanger 20 as shown in FIG. The heat exchanger intake port 21B and the heat exchanger exhaust port 22B are formed in the side surface and the upper surface, respectively, in the 2nd heat exchange board 20B '.

As described above, in the present invention, the heat exchanger 20 is positioned inside the air conditioner, whereby the cooled air is reheated to prevent cold draft and at the same time, the cooling / dehumidification heat is recovered to improve the energy use efficiency, and the damper. 31 is provided so that the temperature and humidity of the air supplied to the room can be precisely adjusted.

Claims

A main body 10 having an inlet port 11 and an outlet port 12 formed therein, respectively;

A heat exchanger (20) provided in the main body (10) and installed downstream of the suction port (11);

A cooling coil (30) provided in the main body (10) and installed on a downstream side of the heat exchanger (20);

A fan (40) provided in the main body (10) and positioned downstream of the cooling coil (30) and discharging air inside the main body (10) to the room;

Air conditioner using the cooling / dehumidification heat recovery technology, characterized in that consisting of the air passage (13a, 13b, 13c, 13d) to allow the air passed through the cooling coil 30 to be re-introduced into the heat exchanger (20).
The method according to claim 1,

The inlet 11 and the outlet 12 are respectively formed on the front of the body 10,

The air passage 13a is formed between the rear surface of the main body 10 and the cooling coil 30 and the lower portion of the cooling coil 30 and the heat exchanger 20, respectively, and has an inverted “b” shape. Air conditioner using a cooling / dehumidification heat recovery technology.
The method according to claim 1,

The inlet 11 is formed on the rear of the main body 10, the outlet 12 is formed on the front of the main body 10,

The air passage 13b is formed between the front surface of the main body 10 and the cooling coil 30 and the lower portion of the cooling coil 30 and the heat exchanger 20, respectively, and has an inverted " b " shape. Air conditioner using a cooling / dehumidification heat recovery technology.
The method according to claim 1,

The suction port 11 is formed on the side of the main body 10, the discharge port 12 is formed on the front of the main body 10,

The air passage 13c is formed between the rear surface of the main body 10 and the cooling coil 30, and the lower portion of the cooling coil 30 and the heat exchanger 20, respectively, characterized in that the "b" shape is formed. Air conditioner using cooling / dehumidifying heat recovery technology.
The method according to claim 1,

The inlet 11 is formed in the lower front side or lower side of the main body 10, the outlet 12 is formed in the front of the main body 10,

The air passage 13d is formed between the front surface of the main body 10 and the cooling coil 30,

The lower part of the air passage (13d) is an air conditioner using a cooling / dehumidification heat recovery technology, characterized in that separated by the suction port (11) by the diaphragm (14) installed on the lower end of the cooling coil (30).
The method according to any one of claims 1 to 5,

The heat exchanger 20 recovers cooling / dehumidifying heat, characterized in that the first heat exchanger plate 20A and the second heat exchanger plate 20B each having the heat exchanger intake and exhaust holes 21A and 22A are alternately stacked. Air conditioning using technology.
The method according to any one of claims 1 to 5,

Cooling, characterized in that the air passage (13a, 13b, 13c, 13d) is further provided with a damper (31) that can be opened and closed so that a part of the air passing through the cooling coil 30 flows directly into the fan (40). / Air conditioner using dehumidification heat recovery technology.
The method according to claim 7,

The damper 31 is an air conditioner using a cooling / dehumidifying heat recovery technology, characterized in that the opening and closing control by a temperature and humidity sensor.