JP4339149B2 - Dehumidifying air conditioner - Google Patents

Description

  The present invention relates to a dehumidifying air conditioner using a moisture adsorbent such as silica gel or zeolite, and more particularly to a device suitable for housing and capable of exhibiting sufficient dehumidifying performance even when the latent heat load in summer is high.

  The dehumidifying air conditioner adjusts the humidity by using the adsorption type dehumidifying means, and can use the exhaust heat of the generator or the like as the driving energy of the adsorption type dehumidifying means, increasing the energy saving effect and comfortable. It is rapidly spreading due to its high nature and good health.

In general, dehumidifying air conditioners perform air conditioning while ventilating, and in such cases, it is necessary to develop a device that can exhibit sufficient performance even in the summer when the sensible heat and latent heat load are very high. ing. An example of such a technique is disclosed in Patent Document 1.
JP 2000-111096 A

  The one disclosed in Patent Document 1 performs total heat exchange between supply air and exhaust, lowers the latent heat load when the humidity of the outside air is high, dehumidifies the air after total heat exchange, cools it, and cools it indoors. It is to be supplied.

  However, the thing of patent document 1 has the problem that humidity cannot fully be reduced only by total heat exchange, when the humidity of external air is very high.

  An object of the present invention is to provide a dehumidifying air conditioner capable of sufficiently reducing indoor humidity and supplying comfortable air without using a refrigerator even when the load of outside air is large.

  In order to solve the above-described problems, the present invention dehumidifies the outside air with a dehumidifying rotor, exchanges sensible heat between the dry air and outside air, vaporizes water in another sensible heat exchanger, and heats the vaporization thereof. Then, the dry air was cooled, and a part of the cooled dry air was returned again to the adsorption side of the dehumidifying rotor.

  Since the dehumidifying air conditioner of the present invention is configured as described above, when the humidity of the outside air rises, a part of the cooled dry air is circulated again to the adsorption zone of the dehumidifying rotor so that the heat of adsorption is removed. The absorbed air is again adsorbed in moisture, and the indoor humidity can be sufficiently reduced.

  Furthermore, since the amount of air passing through the adsorption zone is increased in accordance with the circulation amount, the supply amount of air to the room can be ensured. In addition, since the entire supply air is not circulated and mixed with the outside air, fresh outside air can be sent indoors.

  Invention of Claim 1 of this invention dehumidifies external air with a dehumidification rotor, sensible heat exchange of the obtained dry air and external air, and also vaporizes water in another sensible heat exchanger for cooling, The dry air is cooled by the heat of vaporization, the cooled dry air is supplied into the room, and a part of the cooled dry air is returned to the adsorption side of the dehumidification rotor. Even in this case, the humidity of the supply air can be lowered.

  Hereinafter, embodiments of the dehumidifying air conditioner of the present invention will be described in detail with reference to the drawings. The dehumidifying rotor 1 is formed by forming a heat-resistant sheet such as a ceramic sheet in a honeycomb (honeycomb) shape and supporting a moisture adsorbent such as silica gel or zeolite.

  The sensible heat exchange rotor 2 as the sensible heat exchanger is formed by forming a sheet that does not adsorb moisture such as an aluminum sheet in a honeycomb shape. The dehumidification rotor 1 and the sensible heat exchange rotor 2 are rotated in opposite directions by a geared motor (not shown).

  The dehumidifying rotor 1 is divided into an adsorption zone 3, a low temperature desorption zone 4, and a high temperature desorption zone 5. The sensible heat exchange rotor 2 is divided into an endothermic zone 6 and a heat radiating zone 7. The low temperature desorption zone 4 is located on the upper side with respect to the rotation direction of the dehumidification rotor 1, and the high temperature desorption zone 5 is located on the lower side.

  The orthogonal heat exchanger 8 as the cooling sensible heat exchanger has two flow paths whose directions are orthogonal to each other, that is, a first flow path 9 and a second flow path 10, and the sensible heat exchanger 8 in each flow path. Heat exchange is performed. A spray nozzle 11 for spraying water is provided at the inlet of the first flow path 9.

  Hot water generated from a heat source such as a generator (not shown) is allowed to flow through the hot water coil 12. Of course, hot water from a boiler or the like may flow, but it is better for the global environment to use exhaust heat from a generator or the like.

  Then, the hot water coil 12 is installed in front of the high temperature desorption zone 5 so that the heated air passing through the hot water coil 12 passes through the high temperature desorption zone 5 of the dehumidifying rotor 1.

  The blower 13 is installed in a state in which air is pushed into the passage, and sends outside air to the adsorption zone 3 of the dehumidification rotor 1, the heat absorption zone 6 of the sensible heat exchange rotor 2, and the second flow path 10 of the orthogonal heat exchanger 8. . And the air which passed the 2nd flow path 10 of the orthogonal type heat exchanger 8 is supplied indoors.

  The blower 14 is installed so as to suck out air from the passage, and allows the outside air to pass through the heat radiation zone 7 of the sensible heat exchange rotor 2, the hot water coil 12, the low temperature desorption zone 4 and the high temperature desorption zone 5 of the dehumidification rotor 1. Thus, the air sucked into and passed through the blower 14 is released to the atmosphere.

  Further, a return line 15 is provided so that part of the air that has passed through the second flow path 10 of the orthogonal heat exchanger 8 returns to the suction side of the blower 13 again. A valve 16 that opens and closes this pipeline is provided in the middle of the return pipeline 15.

  The blower 17 sucks out air from the first flow path 9 of the orthogonal heat exchanger 8 and discharges it to the atmosphere. Here, since the blower 17 sucks out the air in the first flow path 9, the atmospheric pressure in the first flow path 9 is lowered, the boiling point of water is lowered in the first flow path 9, and the inside of the first flow path 9 is reduced. The temperature goes down.

  When it is not desired to use a waterproof type as the blower 17, it may be used by pushing air into the first flow path 9. In this case, the temperature drop is small, but an inexpensive blower can be used.

  The dehumidifying air conditioner of the present invention has the above configuration, and the operation thereof will be described below. First, the operation when the latent heat load is not so large, such as during sunny weather in summer, will be described.

  As shown in FIG. 2, the blower 13, the blower 14, and the blower 17 are operated with the valve 16 closed. Further, the dehumidifying rotor 1 and the sensible heat exchange rotor 2 are rotated, warm water is caused to flow through the hot water coil 12, and water is sprayed from the spray nozzle 11.

  As a result, the outside air passes through the adsorption zone 3 of the dehumidifying rotor 1 and becomes dry air. When this dry air passes through the adsorption zone 3, the temperature rises due to heat of adsorption. The high-temperature dry air whose temperature has risen passes through the endothermic zone 6 of the sensible heat exchange rotor 2 to give heat to the sensible heat exchange rotor 2, and the temperature drops.

  The dry air that has fallen in temperature passes through the second flow path 10 of the orthogonal heat exchanger 8. At this time, the sprayed water passes through the first passage 9 together with the air, and the water is vaporized in the first passage 9.

  The temperature inside the second passage 10 as well as the first passage 9 is lowered by the heat of vaporization accompanying this vaporization, and the temperature of the dry air is further lowered and supplied to the room as comfortable air. Inside the orthogonal heat exchanger 8, heat exchange proceeds simultaneously while water is vaporized, so that the relative humidity is 100% at the outlet of the first passage 9. Further, the outlet temperatures of the first passage 9 and the second passage 10 are substantially the same.

  In other words, when the conditions of the air entering the first passage 9 are plotted on the air diagram, the temperature decreases along the enthalpy line on the air diagram, and the temperature reaches the temperature at the point where it intersects the 100% relative humidity line. Will be lowered.

  On the other hand, the outside air passes through the heat radiating zone 7 of the sensible heat exchange rotor 2 by the blower 14, deprives the sensible heat exchange rotor 2 of heat, and the temperature rises. A part of this heated air directly enters the low temperature desorption zone 4 of the dehumidifying rotor 1. The remaining heated air passes through the hot water coil 12 and further rises in temperature, and enters the high temperature desorption zone 5 of the dehumidifying rotor 1.

  Since the low temperature desorption zone 4 is located on the upper side of the rotation of the dehumidification rotor 1, the dehumidification rotor 1 contains a large amount of moisture in this portion, and a large amount of moisture is desorbed even at a low desorption temperature. In the high temperature desorption zone 5, the remaining water is desorbed with high temperature air. Thus, since the low temperature desorption zone 4 and the high temperature desorption zone 5 are provided separately, the dehumidification rotor 1 can be desorbed with a small amount of energy.

  Next, the operation when the latent heat of the outside air and the sensible heat load are large, such as during summer rain, will be described. Here, the description overlapping with the above description is omitted to avoid redundancy.

  As shown in FIG. 1, the blower 13, the blower 14, and the blower 17 are operated to rotate the dehumidifying rotor 1 and the sensible heat exchange rotor 2 in the same manner as described above except that the valve 16 is opened. Hot water is allowed to flow through 12 and water is sprayed from the spray nozzle 11.

  The blower 13 passes through the adsorption zone 3 of the dehumidification rotor 1, the heat absorption zone 6 of the sensible heat exchange rotor 2, and the second passage 10 of the orthogonal heat exchanger 8, and a part of the dry air whose temperature is lowered is supplied to the room. The remaining part passes through the valve 16 and returns to the return line 15.

  The low temperature dry air returned from the return line 15 is mixed with the outside air. As a result, the air entering the adsorption zone 3 of the dehumidifying rotor 1 is in a state where both temperature and humidity are lower than the outside air. The adsorption limit in the adsorption zone 3 depends on the temperature and humidity of the air to be treated.

  That is, if the humidity of the air to be treated is higher than the capacity of the dehumidifying rotor 1, further adsorption is impossible, and if the temperature of the air to be treated is high, the temperature further rises due to the heat of adsorption, so that it cannot be easily adsorbed. The temperature of the air to be treated reaches the temperature.

  Thus, the humidity of the air passing through the adsorption zone 3 can be sufficiently lowered by slightly lowering the temperature and humidity of the air to be treated, that is, the air passing through the adsorption zone 3.

  Of the operation of the embodiment shown in FIG. 1, the operation related to the desorption of the dehumidifying rotor 1 is exactly the same as the operation of the embodiment shown in FIG. In the above description, the operation in which the valve 16 is completely opened or closed has been described. However, the opening degree of the valve 16 is adjusted according to the condition of the outside air, and the air condition to the room can be made appropriate.

  As described above, the dehumidifying air-conditioning apparatus of the present invention returns the part of the cooled dry air to the adsorption zone 3 of the dehumidifying rotor 1 so that the condition of the supply air is desired even when the outside air load is large. Can do.

  According to the present invention, it is possible to provide a dehumidifying air conditioner capable of exhibiting sufficient dehumidifying performance even when the latent heat load in summer is high.

It is a flowchart which shows the Example of the dehumidification air conditioning apparatus of this invention. It is a flowchart which shows other operation | movement of the Example of the dehumidification air conditioner of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dehumidification rotor 2 Sensible heat exchange rotor 3 Adsorption zone 4 Low temperature desorption zone 5 High temperature desorption zone 6 Heat absorption zone 7 Heat dissipation zone 8 Orthogonal heat exchanger 9 1st flow path 10 2nd flow path 11 Spray nozzle 12 Hot water coil 13 Blower 14 Blower 15 Return line 16 Valve 17 Blower

Claims (3)

The outside air is pushed into the adsorption zone of the dehumidification rotor by the blower, the outside air is dehumidified by the dehumidification rotor, the obtained dry air and the outside air are sensible heat exchanged by a sensible heat exchanger, and then in another cooling sensible heat exchanger. The drying air is cooled by heat of vaporization generated by vaporizing water, the cooled drying air is supplied into the room, and a part of the cooled drying air is sent to the suction side of the blower again with the outside air. A dehumidifying air conditioner that returns to the suction side of the dehumidifying rotor.
The dehumidifying air conditioner according to claim 1, wherein the amount of air sent to the adsorption side of the dehumidification rotor is changed according to the amount of the cooled dry air returned to the adsorption side of the dehumidification rotor. The dehumidifying air conditioner according to claim 1 or 2, wherein the desorption zone of the dehumidification rotor is divided into a low temperature desorption zone and a high temperature desorption zone, and the low temperature desorption zone is set to the upper side in the rotation direction of the dehumidification rotor.

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