JPH0636404Y2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an air conditioner capable of dehumidifying operation.

<Prior Art> Conventionally, there is an air conditioner capable of dehumidifying operation as shown in FIG. 6 (Japanese Utility Model Publication No. 1-8897). In this air conditioner, a precooling box 1 is provided on the upstream side of the coil box 2, while a reheating box 4 is provided on the downstream side of the coil box 2 via a fan box 3. A pre-cooling coil C is provided in the pre-cooling box 1 and a coil box 2 is provided.
Is provided with a cooling coil A, and the reheating box 4 is provided with a reheating coil B. The precooling coil C and the reheating coil B are connected by a pipe P so that the heat medium can be circulated between the precooling coil C and the reheating coil B.

In the above air conditioner, the air introduced from the air intake 6 and precooled by the precooling coil C is cooled to a predetermined temperature by the cooling coil A and dehumidified by the rotation of the blower 5 installed in the fan box 3. . further,
The air that has passed through the cooling coil A is heat-exchanged by the reheating coil B to obtain air having an appropriate temperature and humidity. At that time, hot water obtained by heat exchange with the air in the pre-cooling coil C is supplied to the reheating coil B via the pipe P to reheat the air passing through the reheating coil B.
On the other hand, the cold water obtained by the heat exchange with the air in the reheating coil B is returned to the precooling coil C via the pipe P. Thus, the heat absorbed by the pre-cooling coil C is recovered and used by the reheating coil B, so that the amount of heat used during reheating can be significantly reduced.

<Problems to be Solved by the Invention> However, in the above-described conventional air conditioner capable of dehumidifying operation, the precooling coil C is required for supercooling when dehumidifying the introduced air, and further, it is supercooled. Reheat coil B is required to bring the air to the proper temperature.
Therefore, the air conditioner requires a heat exchanger for pre-cooling and a heat exchanger for reheating, a heater, or the like in addition to the original heat exchanger, which causes a problem of requiring a large space. Further, in order to obtain a large dehumidifying effect, the cold water temperature of the pre-cooling coil C or the cooling coil A is lowered.
For example, the contact area between the air and the pre-cooling coil C and the cooling coil A is increased. However, this has an influence on the entire system, and there is a problem in that increasing the coil capacity is costly.

Further, when the air conditioner performs cooling in the summer, the air cooled to a predetermined temperature by the cooling coil A is reheated by the reheating coil B, and there is a problem that the cooling capacity deteriorates. On the other hand, when performing heating in the winter season, the indoor air taken in from the air intake 6 is pre-cooled by the pre-cooling coil C, so that there is a problem that the heating capacity is lowered.

Therefore, an object of the present invention is to provide an air conditioner that is advantageous in terms of cost and space and can obtain a high dehumidifying effect without lowering the normal cooling and heating capacity.

<Means for Solving the Problems> In order to achieve the above object, the first invention is to supply the indoor air sucked by the rotation of the fan 13 to the heat exchanger 14 as shown in FIG. In the air conditioner that supplies the air after heat exchange with the heat exchanger 14 to the room again from the air outlet 15, it is provided on either one end side or the other end side in the vicinity of the one side surface 19 of the heat exchanger 14. The first damper 16 that opens and closes around the fulcrum 21 as a rotation center and covers the one side surface 19 of the heat exchanger 14 when closed, and the other end side or the one end side of the other side surface 20 near the other side surface of the heat exchanger 14. A second damper 17 that opens and closes with a fulcrum 22 provided on the other side as a rotation center and covers the other side surface 20 of the heat exchanger 14 when closed is provided, and the first damper 16 and the second damper 16 are provided.
It is characterized in that when the damper 17 is closed, an air passage is formed in the longitudinal direction of the heat exchanger 14.

The second invention is, as illustrated in FIG. 1 and FIG. 3, in the air conditioner, the heat exchanger 14 has a heat medium supplied from the outside at the central portion in the air passage direction. A heating / cooling pipe 31 is provided for passing heat and exchanging heat between the heating medium and air, and the heating medium passes upstream of the air passage of the heating / cooling pipe 31 in the heat exchanger 14. In addition, the heat absorbing pipe 32 that absorbs the heat of the air by performing heat exchange between the heat medium and the air is provided, while the heat medium passes through on the downstream side of the air passage of the heating / cooling pipe 31. A heating pipe 33 for heating the air by performing heat exchange between the heat medium and air is provided, and the heat medium in the heat absorbing pipe 32 and the heat medium in the heating pipe 33 in the heat exchanger 14 are circulated. For endothermic tube 32
The heating pipe 33 and the heating pipe 33 are connected to each other in an annular shape by pipes 29 and 30.

<Operation> In the first invention, when the fan 13 is rotated, the indoor air is sucked and supplied to the heat exchanger 14. Then, the air that has exchanged heat with the heat exchanger 14 is supplied again from the blowout port 15 into the room. At that time, the first damper 16 is closed around a fulcrum 21 provided at one end or the other end near one side surface 19 of the heat exchanger 14 as a rotation center, while the second damper 16 is closed. 17 is the other side 20 of the heat exchanger 14
When the heat exchanger 14 is closed around a fulcrum 22 provided on the other side of the other end or on the other end of the one end, an air passage is formed in the longitudinal direction of the heat exchanger 14.

Therefore, the contact area between the air and the heat exchanger 14 can be made large, and sufficient heat exchange can be performed.

In the second invention, the first damper 16 and the second damper 17 are closed during dehumidification. Then, fan 13
The room air sucked by the rotation is supplied to the upstream side of the air passage of the heat exchanger 14, and is heat-exchanged with the heat medium in the endothermic pipe 32 to be pre-cooled. Then, the precooled air is guided by the first damper 16 and the second damper 17 to traverse the inside of the heat exchanger 14 and is heat-exchanged with the heat medium in the heating / cooling pipe 31 to be supercooled to a predetermined temperature. And dehumidified. Further, the supercooled air is heat-exchanged with the heat medium in the heating pipe 33 to be reheated, and is again supplied into the room through the blowout port 15.

At that time, the heat medium in the endothermic tube 32 that has absorbed heat when precooling the room air is supplied to the heating tube 33 via the pipe 30,
The heat medium in the heating pipe 33 that has released heat when reheated is supplied to the heat absorbing pipe 32 through the pipe 29, and the heat medium in the heat absorbing pipe 32 and the heat medium in the heating pipe 33 circulate. That is, the heat generated in the endothermic pipe 32 is recovered in the heating pipe 33 and used for reheating.

Further, since the supercooled air traverses the inside of the heat exchanger 14, the contact area between the air and the heating / cooling pipe 31 is large and the dehumidifying effect is large.

On the other hand, during normal cooling and heating, the first damper 16 and the second damper 16
17 is open. Then, the sucked indoor air traverses the entire area of the heat exchanger 14 at the same time, so that circulation does not occur between the heat medium in the heat absorbing pipe 32 and the heat medium in the heating pipe 33, and the indoor air absorbs heat and absorbs heat. It is heated / cooled to a predetermined temperature by the heating / cooling pipe 31 without being reheated. Therefore, the cooling / heating capacity does not decrease during normal cooling / heating.

<Embodiment> Hereinafter, the present invention will be described in detail with reference to an illustrated embodiment.

FIG. 1 is a sectional view of an air conditioner showing an embodiment of the present invention. This air conditioner supplies the indoor air sucked in by rotating the fan 13 of the blower 12 to the heat exchanger 14, and supplies the air after heat exchange with the heat exchanger 14 to the room again from the air outlet 15. I am trying.

Inside the air conditioner main body 11 forming a box, the lower part is located on the upstream side of the air passage and the upper part is located on the downstream side.
14 is installed diagonally. Then, dampers 16 and 17 are provided along both side surfaces 19 and 20 of the heat exchanger 14. Heat exchanger
The damper 16 provided along the side surface 19 on the upstream side of 14 can be opened and closed with a fulcrum 21 provided above the vicinity of the side surface 19 as a rotation center. On the other hand, the side surface on the downstream side of the heat exchanger 14
The damper 17 provided along 20 can be opened and closed about a fulcrum 22 provided below the side surface 20 as a center of rotation. Furthermore, the vertical length of both dampers 16 and 17 is shorter than the vertical length of the heat exchanger 14. Therefore, when both dampers 16 and 17 are closed, both side surfaces 1 of the heat exchanger 14 are
9,20 are not completely covered by dampers 16,17,
The lower part of the side surface 19 and the upper part of the side surface 20 are opened.

In the opening 23 provided at the rear of the air conditioner body 11, the blower port 24 of the blower 12 incorporating the fan 13 is inserted, while the air outlet 15 is provided in front of the air conditioner body 11. . As a result, when both dampers 16 and 17 are opened, an air passage is formed so as to traverse the entire area of the heat exchanger 14 as shown in FIG.
When 7 is closed, as shown in FIG.
That is, an air passage is formed so as to vertically pass through.

The heat exchanger 14 has the following structure in order to allow sufficient dehumidification when performing heat exchange with air. That is, as shown in FIG. 3, the hot and cold water pipes arranged in the heat exchanger 14 are arranged in order from the lower side in an endothermic (precooling) zone D, a heating / cooling (dehumidifying) zone E and a reheating zone F.
It is divided into three zones. The lower part of the heat exchanger 14 opened when the damper 16 is closed as described above becomes the heat absorption zone D, and the upper part of the heat exchanger 14 opened when the damper 17 is closed is re-set. The heating zone F is provided. The one end surface 25 of the heat exchanger 14 has a cold / hot water pipe 31 in the heating / cooling zone E.
A pipe connection port (26) on the cold / hot water outlet side and a pipe connection port (27) on the cold / hot water inlet side are provided when supplying cold / hot water to. Further, the cold / hot water pipe 32 of the heat absorption zone D and the cold / hot water pipe 33 of the reheating zone F are arranged along the outside of the other end surface 28 of the heat exchanger 14 as shown in FIG. Connect in a ring with. Then, the hot water obtained by the heat exchange with the air in the heat absorption zone D is circulated through the pipe 30 and supplied to the reheating zone F. On the other hand, cold water obtained by heat exchange with air in the reheating zone F is circulated through the pipe 29 and supplied to the heat absorption zone D.

The air conditioner configured as described above operates as follows.

(B) During dehumidification operation (for example, rainy season) In this case, both the dampers 16 and 17 are closed. Then, when the fan 13 of the blower 12 is rotated, the indoor air is taken in and supplied toward the heat exchanger 14. At that time, both dampers
Since 16 and 17 are closed, the room air blown from the blower port 24 of the blower 12 is supplied to the heat absorption zone D which is not blocked by the damper 16. Then, heat is exchanged with the fins of the heat exchanger 14 while longitudinally traversing the inside of the heat exchanger 14 from the heat absorption zone D to the reheating zone F via the heating / cooling zone E, and the heat is not blocked by the damper 17. It is supplied from the heating zone F toward the outlet 15. At that time, the drain generated on the fins of the heat exchanger 14 is transmitted through the fins of the heat exchanger 14 or the damper 17 and falls to the drain pan.
It is collected in 18 and discharged to the outside.

In this state, the room air supplied to the heat absorption zone D of the heat exchanger 14 exchanges heat with the water in the cold / hot water pipe 32 via the fins in the heat absorption zone D. As a result, the room air is pre-cooled, and at the same time, the water in the cold / hot water pipe 32 is heated to a temperature higher than the temperature of the water in the cold / hot water pipe 33 in the reheating zone F.
Then, since there is a difference in water temperature between the heat absorbing zone D and the reheating zone F in the cold / hot water pipe, cold / hot water circulation occurs.
The hot water in the cold / hot water pipe 32 of the endothermic zone D is pipe 30
The cold water in the cold / hot water pipe 33 of the reheating zone F is supplied to the heat absorbing zone D via the pipe 29 and precools the indoor air supplied one after another.

Thus, the air precooled in the heat absorption zone D is supplied to the next heating / cooling zone E. Since hot water having a predetermined temperature is supplied to the heating / cooling zone E from the pipe connection port 27 as follows, the air passing through the heating / cooling zone E is cooled to a predetermined temperature and dehumidified. Be seen.
At that time, since the air flow in this embodiment passes through the heating / cooling zone E, the air and heating / cooling
A large contact area with the heat exchanger 14 in the cooling zone E can be secured, and a large dehumidifying effect can be obtained. At that time, if the rotation speed of the fan 13 of the blower 12 is reduced to slow the flow velocity of the air longitudinally passing through the heat exchanger 14, the contact time with the heat exchanger 14 can be lengthened, and a greater dehumidifying effect can be obtained. Obtainable.

Thus, the air that has been cooled to a predetermined temperature and dehumidified in the heating / cooling zone E is supplied to the reheating zone F. In the cold / hot water pipe 33 of the reheating zone F, the heat absorption zone D
Hot water is supplied from. Therefore, as described above, the air cooled to an appropriate temperature or lower when dehumidifying in the heating / cooling zone E exchanges heat with the hot water in the cold / hot water pipe 33 via the fins in the reheating zone F of the heat exchanger 14. As a result, the air is reheated to an appropriate temperature and at the same time the cold / hot water pipe 33
The water is cooled to a temperature lower than the temperature of the water in the cold / hot water pipe 32 of the heat absorption zone D, and the circulation of the cold / hot water as described above is promoted.

By doing so, the heat generated in the heat absorption zone D is recovered and used in the reheating zone F, so that the amount of heat used can be greatly reduced. Further, since the precooling, dehumidification, and reheating of the taken-in room air are carried out in one heat exchanger 14, a large dehumidifying effect can be obtained in a small space.

(B) Normal cooling / heating (for example, summer / winter) In this case, both the dampers 16 and 17 are opened. Then, when the fan 13 of the blower 12 is rotated, the indoor air is taken in and supplied toward the heat exchanger 14. At that time, both dampers
Since 16 and 17 are open, the indoor air blown from the blower port 24 of the blower 12 is supplied to the entire one side surface 19 of the heat exchanger 14. Then, while traversing the heat exchanger 14 as it is, heat is exchanged with the fins of the heat exchanger 14 so that the heat exchanger 14
Is supplied from the entire surface of the other side surface 20 to the air outlet 15. At that time, the drain generated on the fins of the heat exchanger 14 and the like falls along the fins of the heat exchanger 14 or the damper 17, and is collected in the drain pan 18 and discharged to the outside.

In this state, the indoor air supplied to the heating / cooling zone E exchanges heat with the water in the cold / hot water pipe 31 via the fins of the heat exchanger 14. At that time, since the cold / warm water having a predetermined temperature is supplied to the heating / cooling zone E from the pipe connecting pipe 27 as described above, the air passing through the heating / cooling zone E is heated / cooled to the predetermined temperature. Then, it is blown out into the room from the outlet.

On the other hand, in this state, the room air is simultaneously supplied to the heat absorption zone D and the reheating zone F. As a result, the temperature of the water in the cold / hot water pipe 32 of the heat absorption zone D becomes substantially the same as the temperature of the water in the cold / hot water pipe 33 of the reheating zone F. for that reason,
Since there is no difference in the water temperature in the cold / hot water pipe between the heat absorption zone D and the reheating zone F, unlike the case of the dehumidifying operation described above, circulation of cold / hot water does not occur. Therefore, the heat absorption zone D and the reheating zone F do not contribute to cooling and heating.

That is, in the air conditioner in this embodiment, in normal heating and cooling, both dampers 16 and 17 are closed to change the air passage so that pre-cooling and reheating are not performed, so the cooling and heating capacity during normal cooling and heating is It does not fall.

As described above, the air conditioner according to the present embodiment includes the heat exchanger.
14 is divided into an endothermic zone D, a heating / cooling zone E and a reheating zone F. Then, the cold / hot water pipe 32 of the heat absorption zone D and the cold / hot water pipe 33 of the reheating zone F are connected in an annular shape by the pipes 29, 30 so that the cold / hot water of the heat absorbing zone D and the reheating zone F can be circulated. In addition, a damper 16 that blocks the lower part of one side surface 19 of the heat exchanger 14 and a damper 17 that blocks the upper part of the other side surface 20 are provided, and both dampers 16 and 17 are closed during dehumidifying operation such as during the rainy season. Thus, the heat exchanger 14 is formed with an air passage extending vertically from the heat absorption zone D to the reheating zone F. Therefore, the indoor air taken in during dehumidification is pre-cooled in the heat absorption zone D when the heat exchanger 14 is traversed longitudinally, dehumidified in the heating / cooling zone E, and reheated in the reheating zone F. Therefore, a heat exchanger or heater for pre-cooling and re-heating is not required, and pre-cooling, dehumidification and re-heating can be performed by one heat exchanger 14, so that the air conditioner can be made compact and the cost can be reduced. it can.

Further, at that time, the heat when reheating the air from the heating / cooling zone E in the reheating zone F is equal to the heat absorption zone D.
In the case of pre-cooling the indoor air, the heat taken from the indoor air is recovered and used, so that the amount of heat for reheating is not required and energy can be saved. Further, when dehumidifying in the heating / cooling zone E, the air is made to flow vertically through the heat exchanger 14, so that the contact area between the air and the heat exchanger 14 can be increased to enhance the dehumidifying effect.

Further, during normal heating and cooling, the dampers 16 and 17 are opened to change the air passage so that pre-cooling and reheating are not performed, so that normal cooling and heating operation can be performed without lowering the capacity. Further, by adjusting the openings of the dampers 16 and 17, it is possible to control the dehumidifying amount during the dehumidifying operation and the cooling and heating capacity during the cooling and heating operation.

In the above embodiment, the heat absorption zone D and the reheating zone F do not contribute to the cooling / heating operation at all during the cooling / heating operation. Therefore, the cold / hot water pipe 31 in the heating / cooling zone E
By providing a valve for communicating the cold / hot water pipe 32 of the heat absorption zone D and the cold / hot water pipe 33 of the reheating zone F, and opening / closing the valve at the time of heating / cooling operation, each cold / hot water pipe 31, 32, 33 can be used for heating / cooling. It is possible to obtain an even greater cooling and heating effect.

<Effect of device> As is clear from the above, the air conditioner of the first device is
A first damper that covers one side of the heat exchanger when closed, and a second damper that covers the other side of the heat exchanger when closed,
Since the air passage is formed in the longitudinal direction of the heat exchanger when the first damper and the second damper are closed, the contact area between the air and the heat exchanger is increased to improve the heat exchange efficiency. be able to.

In the heat exchanger in the air conditioner of the second invention, a heating / cooling pipe for passing a heat medium from the outside is arranged at the center in the air passage direction, and the heating / cooling pipe is provided on the upstream side of the air passage. A heat absorbing tube is provided in the heating / cooling tube, and a heating tube is provided downstream of the air passage of the heating / cooling tube. The heat absorbing tube and the heating tube are annularly connected by a pipe. Since the damper and the second damper are closed to form an air passage that longitudinally crosses the heat exchanger from the heat absorbing tube side toward the heating tube side, the indoor air sucked by the rotation of the fan is generated when the heat exchanger is longitudinally crossed. After being pre-cooled by an endothermic tube, it is supercooled by a heating / cooling tube to be dehumidified, and then reheated by a heating tube. Therefore, a heat exchanger for pre-cooling and re-heating, a heater, etc. are not necessary, and the space can be reduced and the cost can be reduced. Further, at this time, since the air passes through the heat exchanger in a vertical direction, the contact area between the air and the heating / cooling pipe can be increased and sufficient dehumidification can be performed.

Further, during normal heating and cooling, the first damper and the second damper are opened to generate the air passage that crosses the heat exchanger, and the sucked indoor air is simultaneously supplied to the entire area of the heat exchanger. The indoor air is not pre-cooled or re-heated, and the cooling / heating capacity does not decrease.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the air conditioner of the present invention during dehumidifying operation, FIG. 2 is a sectional view of FIG. 1 during cooling / heating operation, and FIG. 3 is a piping diagram of cold / hot water pipes in a heat exchanger. FIG. 4 is one end view of the heat exchanger, FIG. 5 is another end view of the heat exchanger, and FIG. 6 is a partial cross-sectional view of a conventional dehumidifying operation air conditioner. 11 …… Air conditioner body, 12 …… Blower, 13 …… Fan, 14 …… Heat exchanger, 15 …… Blowout port, 16,17 …… Damper, 18 …… Drain pan, 29,30 …… Pipe, 31,32,33 …… Cold and hot water pipes, D …… Endothermic zone, E …… Heating / cooling zone, F …… Reheating zone.

Claims (2)

[Scope of utility model registration request] 1. The indoor air sucked by the rotation of a fan (13) is supplied to a heat exchanger (14), and the air after heat exchange with the heat exchanger (14) is again discharged from the air outlet (15) into the indoor space. A fulcrum (21) provided on either one end side or the other end side of the heat exchanger (14) near one side face (19) in the air conditioner
The heat exchanger (14) is opened and closed around the
A first damper (16) that covers the one side surface (19) of the heat exchanger (14), and a fulcrum provided on the other side of the other end side or the one end side near the other side surface (20) of the heat exchanger (14) ( A second damper (17) which opens and closes around the rotation center of the heat exchanger (22) and covers the other side surface (20) of the heat exchanger (14) when closed. The first damper (16) and the second damper (17) are provided. ) Is closed, an air passage is formed in the longitudinal direction of the heat exchanger (14). 2. The air conditioner according to claim 1, wherein the heat exchanger (14) allows a heat medium supplied from the outside to pass through a central portion of the heat exchanger (14) in the air passage direction, and the heat medium and the air. A heating / cooling pipe (31) for exchanging heat with the heating / cooling pipe (31) is arranged, and a heating medium is passed through the heating / cooling pipe (31) upstream of the air passage of the heating / cooling pipe (31). An endothermic pipe (32) that exchanges heat between the heat medium and air and absorbs the heat of the air is arranged, while the heat medium passes downstream of the air passage of the heating / cooling pipe (31). A heating pipe (33) for heating the air by exchanging heat between the heat medium and air is also provided, and the heat medium in the heat absorbing pipe (32) of the heat exchanger (14) and the heating pipe (33) are arranged. In order to circulate the heat medium inside the pipe), the endothermic pipe (32) and the heating pipe (33) are annularly connected by pipes (29, 30). Air conditioner to be.