Dehumidifying air conditioner

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Industrial application field]

The present invention relates to a dehumidifying air conditioner that dehumidifies and air-conditions a room with a latent heat exchanger.

【0002】

[Conventional technology]

Conventionally, the so-called desiccant air conditioner shown in FIG. 2 is known as this type of dehumidifying air conditioner.

【0003】

In this air conditioner, the first air passage 3 ventilated by the blower 2a and the second air passage 4 ventilated by the blower 2b are arranged side by side in the apparatus housing 1, and the windward side of the first air passage 3. On the leeward side of the second air passage 4, a rotary latent heat exchanger 5 impregnated with a hygroscopic agent that rotates by a motor or the like straddling the air passages 3 and 4 is arranged, and the first air passage 3 On the leeward side and on the leeward side of the second air passage 4, a rotary sensible heat exchanger 6 that is rotated by a motor or the like is also arranged across the air passages 3 and 4. In addition, a regeneration heater 7 that heats the air that has passed through the sensible heat exchanger 6 is arranged between the heat exchangers 5 and 6 in the second air passage 4.

【0004】

According to the desiccant air conditioner configured in this way, in the summer mode, as shown by the white arrow in FIG. 2, hot outside air flows into the latent heat exchanger 5 through the first air passage 3. The outside air is absorbed by the hygroscopic agent of the heat exchanger 5, and is heated by the heat generated during this moisture absorption. This heated air is cooled by the sensible heat exchanger 6, becomes low humidity air, and is supplied to the room. On the other hand, the return air in the room flows to the sensible heat exchanger 6 of the second air passage 4, and the sensible heat exchanger 6 exchanges heat with the outside air passing through the first air passage 3 side to heat the air. The heated air is further heated through the regeneration heater 7 to become renewable air for the hygroscopic agent, and its relative humidity is also lowered to flow to the latent heat exchanger 5. The air flowing through the latent heat exchanger 5 absorbs the moisture of the hygroscopic agent, regenerates the hygroscopic agent, and is exhausted to the outside.

【0005】

In winter, as shown by the diagonal arrows in FIG. 2, low-temperature outside air is ventilated to the sensible heat exchanger 6 and heated by the sensible heat exchanger 6. The heated outside air is further heated by the regeneration heater 7, and the heat absorbing agent of the latent heat exchanger 5 is regenerated by the heated air to become high humidity air and supplied to the room. On the other hand, the return air in the room flows to the latent heat exchanger 5 to absorb moisture, is further cooled through the sensible heat exchanger 6, and is exhausted to the outside.

【0006】

[Problems to be Solved by the Invention]

As described above, in the conventional dehumidifying air conditioner, cooling is performed while maintaining the indoor humidity at a low humidity in the summer, while heating is performed while maintaining the indoor humidity at a high humidity in the winter.

【0007】

By the way, in a store equipped with a cooling case such as a freezing / refrigerating open showcase, it is necessary to keep the humidity inside the store as low as possible not only in summer but also in winter in order to prevent dew condensation and frost formation on the cooling case. is there.

【0008】

However, since this conventional dehumidifying air conditioner humidifies and heats in winter, there is a problem that dew condensation and frost formation are likely to occur in the cooling case, and the heating load increases due to high humidity. It was.

【0009】

An object of the present invention is to provide a dehumidifying air conditioner capable of dehumidifying and heating in winter as well as dehumidifying and cooling in summer in view of the above-mentioned conventional problems.

【0010】

[Means for solving problems]

In order to solve the above problems, the present invention is installed across the first and second main air passages arranged in parallel and through which indoor air or outside air flows, and the first and second main air passages, respectively, and is impregnated with a hygroscopic agent. The rotary latent heat exchanger, the rotary sensible heat exchanger installed across the first and second main air passages and arranged at intervals from the latent heat exchanger, and the first main air. The first regenerative heater for regenerating the hygroscopic agent, which was arranged between the latent heat exchanger and the sensible heat exchanger in the path, and the second main air passage, which were arranged on the wind side of the latent heat exchanger. The second regeneration heater for regenerating the hygroscopic agent and the first sub that guides the outside air sequentially blown to the sensible heat exchanger and the latent heat exchanger in the first main air passage to the leeward side of the second main air passage. The air passage, the second sub air passage that guides the indoor air sequentially blown to the latent heat exchanger and the sensible heat exchanger in the second main air passage to the leeward side of the first main air passage, and the first It is characterized by being provided with a damper mechanism for switching the ventilation of indoor air and outside air between the second main air passage and the first and second sub air passages.

【0011】

[Action]

According to the present invention, when indoor cooling is performed in summer, the first regeneration heater is energized and the second regeneration heater is stopped, and the damper mechanism is used to move to the first and second sub air passages. Regulate the air flow in the air and allow ventilation in the 1st and 2nd main air passages. That is, the return air in the room is taken into the second main air passage, ventilated to the latent heat exchanger, and absorbed by the hygroscopic agent of the latent heat exchanger. By this moisture absorption, it becomes dry air, and this dry return air is cooled by the sensible heat exchanger and supplied to the room. On the other hand, the outdoor outside air is ventilated to the sensible heat exchanger side of the first main air passage. In this sensible heat exchanger, the outside air is heated by the sensible heat absorbed during the circulation of the return air, and the heated outside air is further heated by the first regeneration heater. The air heated by the first regeneration heater is ventilated to the latent heat exchanger, the moisture absorbed by the hygroscopic agent is removed and regenerated, and the air is exhausted to the outside.

【0012】

When indoor heating is performed in winter, contrary to indoor cooling, energization of the first regeneration heater is stopped and energization is applied to the second regeneration heater, and the damper mechanism is used to energize the first and second main air passages. Regulate the ventilation inside and release the ventilation to the 1st and 2nd sub air passages. As a result, the outdoor outside air is taken into the first main air passage, the outside air is heated by the sensible heat exchanger, and further ventilated to the latent heat exchanger to dehumidify. This dehumidified air is supplied to the room from the leeward side of the first main air passage via the first sub air passage. On the other hand, the return air in the room is heated by the second regeneration heater, and this heated air is ventilated to the latent heat exchanger through the second main air passage. In this latent heat exchanger, the humidity of the hygroscopic agent is vaporized by the heated air, and the hygroscopic agent is regenerated. The regenerated air from the hygroscopic agent is blown to the sensible heat exchanger and cooled by the sensible heat exchanger. This cooled return air is ventilated to the leeward side of the first main air passage through the second sub air passage and is exhausted to the outside.

【0013】

[Example]

1 and 3 to 6 show an embodiment of the dehumidifying air conditioner according to the present invention, FIG. 1 is a perspective view of the dehumidifying air conditioner, FIG. 3 is an exploded perspective view of the dehumidifying air conditioner, and FIG. a) and (b) are cross-sectional views showing the operation of the damper mechanism, FIG. 5 is a wind circuit diagram showing the action during summer cooling, and FIG. 6 is a wind circuit diagram showing the action during winter heating.

【0014】

The dehumidifying air conditioner 10 has a first main air passage 11a and a second main air passage 11b formed by partitioning a flat elongated box body into upper and lower parts, and an elongated box shape arranged on the left and right of each of the main air passages 11a and 11b. It has a first sub air passage 12a and a second sub air passage 12b. Further, in each of the main air passages 11a and 11b, a latent heat exchanger 13 and a sensible heat exchanger 14 are arranged at intervals across the air passages 11a and 11b, and the heat exchangers 13 and 14 are shown in the figure. It is designed to rotate with a motor that does not.

【0015】

The latent heat exchanger 13 is composed of a flat plate-shaped substrate 131 made of inorganic paper and a wavy substrate 132, and the substrates 131 and 132 are spirally wound so as to be arranged alternately in a laminated state. An inorganic hygroscopic agent such as silica gel is applied to each of the substrates 131 and 132. Further, the sensible heat exchanger 14 is formed by arranging flat plate-shaped substrates 141 having good heat transfer properties, for example, in a grid pattern.

【0016】

In each of the main air passages 11a and 11b, the first main air passage 11a constitutes an outside air introduction port A whose one end opening faces the outside, and the other end opening also serves as an indoor return air or outside air exhaust port B facing the outside. It is configured. On the other hand, the second main air passage 11b has one end opening forming an air supply port C facing the room, and the other end opening also forming an indoor return air introduction port D facing the room. In addition, in order to forcibly ventilate air in each main air passage 11a, 11b, blowers 15a, 15b are installed corresponding to each main air passage 11a, 11b, and this blower 15a is the first main air passage 11a. The blower 15b blows air from the outside air inlet A toward the exhaust port B, while the blower 15b blows air from the return air inlet D of the second main air passage 11b toward the air supply port C. Further, a first regeneration heater 16a for regenerating the hygroscopic agent is arranged between the latent heat exchanger 13 of the first main air passage 11a and the sensible heat exchanger 14, while the latent heat of the second main air passage 11b is generated. A second regeneration heater 16b that also regenerates the hygroscopic agent is arranged on the windward side that ventilates the exchanger 13 side.

【0017】

As shown in FIG. 3, the first and second main air passages 11a and 11b and the first and second sub air passages 12a and 12b arranged in this way have each air passage switching hole 17a to 17d and each of them. Damper mechanisms 18a to 18d that open and close the air passage switching holes 17a to 17d are installed.

【0018】

That is, in the first main air passage 11a, the air passage switching holes 17a and 17b are bored between the exhaust port B and the latent heat exchanger 13, and the air passage switching holes 17a are one side surface of the latent heat exchanger 13 side. In addition, the air passage switching holes 17b are arranged on the other side surfaces on the exhaust port B side. On the other hand, in the second main air passage 11b, air passage switching holes 17c and 17d are bored between the air supply port C and the sensible heat exchanger 14, and the air passage switching holes 17c are on the sensible heat exchanger 14 side. On one side surface, the air passage switching holes 17d are arranged on the other side surface on the air supply port C side.

【0019】

Further, the air passage switching hole 17a and the air passage switching hole 17d communicate with the first sub air passage 12a, and the outside air passing through the latent heat exchanger 13 in the first main air passage 11a is passed through the first sub air passage 12a to the second. It is designed to lead to the air supply port C of the main air passage 11b. On the other hand, the air passage switching hole 17b and the air passage switching hole 17c communicate with the second sub air passage 12b, and the return air in the room through the heat exchanger 14 in the second main air passage 11a is passed through the second sub air passage 12b. It is designed to lead to the exhaust port B of the first main air passage 11a through.

【0020】

On the other hand, the damper mechanisms 18a to 18d for opening and closing the air passage switching holes 17a to 17d rotate the opening / closing plate 182 by the motor 181 as shown in FIGS. 3 and 4 (a) and 4 (b). It is configured to switch. Here, as shown in FIG. 4A, the damper mechanism 18a opens and closes the air passage switching hole 17a, the damper mechanism 18b opens and closes the air passage switching hole 17b, and is also shown in FIG. 4B. As described above, the damper mechanism 18c opens and closes the air passage switching hole 17c, and the damper mechanism 18d opens and closes the air passage switching hole 17d. Further, each damper mechanism 18a to 18d opens the air passage switching holes 17a to 17d in synchronization with each other, and at the time of this opening, the ventilation in each of the main air passages 11a and 11b is regulated, respectively.

【0021】

Next, the air conditioning operation of the defrosting air conditioner 10 will be described with reference to FIGS. 3 to 6.

【0022】

First, indoor cooling in summer will be described. When performing this indoor cooling operation, the air passage switching holes 17a to 17d are closed by the damper mechanisms 18a to 18d to regulate the ventilation to the sub air passages 12a and 12b, and as shown in FIG. Stop energizing the regeneration heater 16b. As a result, the outdoor outside air (the amount of water in the unit volume contained in the outside air at 33 ° C: 18.7 g: point I, 33 ° C / 18.7 g) enters the first main air passage 11a from the outside air inlet A and becomes sensible. It is ventilated to the heat exchanger 14 side. The outside air is heated by the sensible heat exchanger 14 (point B, 33 ° C + c / 18.7g: c is the temperature of the sensible heat), and this heated outside air is further heated by the first regeneration heater 16a (c). Point, 33 ° C + c + d / 18.7g: d is the temperature of the heater heating). The air heated by the first regeneration heater 16a is ventilated to the latent heat exchanger 13 to remove and regenerate the moisture absorbed by the hygroscopic agent (two points, 33 ° C + c + da / 18.7g + x). : a is the temperature of the heat absorbed and x is the amount of water that increases when the moisture is removed), and is exhausted to the outside from the exhaust port B.

【0023】

On the other hand, the return air in the room (point E, 27 ° C / 11.2 g) is taken into the second main air passage 11b from the return air inlet D, ventilates to the latent heat exchanger 13, and is absorbed by the hygroscopic agent of the latent heat exchanger 13. (He point, 27 ° C + a / 11.2g - x). This return air is heated by the heat generated during this moisture absorption, and this return air is further cooled by the sensible heat exchanger 14 (point, 27 ° C + a-c / 11.2 g-x), and through the air supply port C. Air is supplied to the room.

【0024】

In this way, during indoor cooling, dehumidification is performed by the amount of "x", and dehumidification and cooling is performed.

【0025】

Next, the indoor heating in winter will be described. When performing this indoor heating, the air passage switching holes 17a to 17d are opened by the damper mechanisms 18a to 18d to release the ventilation to the sub air passages 12a and 12b, and the first regeneration is performed as shown in FIG. Stop energizing the heater 16a. As a result, the outdoor outside air (point B, 7 ° C / 5.4 g) is taken into the first main air passage 11a from the outside air introduction port A, and this outside air is ventilated to the manifest heat exchanger 14. This outside air is heated by the sensible heat exchanger 14 (point B, 7 ° C + c / 5.4 g: c is the temperature of the sensible heat), and is further ventilated to the latent heat exchanger 13. In this latent heat exchanger 13, the humidity of the outside air is absorbed by the hygroscopic agent (point C, 7 ° C + c + a / 5.4g - x: a is the temperature of the heat absorbing heat, x is the amount of water dehumidified by the moisture absorption. ). The absorbed outside air flows to the first sub air passage 12a through the air passage switching hole 17a, is further blown to the windward side of the second main air passage 11b through the air passage switching hole 17d, and is blown into the room from the air supply port C. To.

【0026】

On the other hand, the return air in the room (2 points, 21 ° C / 7.6g) enters the 2nd main air passage 11b through the return air inlet D and is heated by the 2nd regeneration heater 16b (E point, 21 ° C). + d / 7.6g: d is the temperature of the heater heating). This heated return air is dehumidified and regenerated by the latent heat exchanger 13 (point, 21 ° C + da / 7.6g + x). Then, the humidified and cooled return air is ventilated to the sensible heat exchanger 14 and cooled (21 ° C + da-c / 7.6g + x). The humidified and cooled return air flows to the second sub air passage 12a through the air passage switching hole 17c, is further sent to the windward side of the first main air passage 11a through the air passage switching hole 17b, and is exhausted from the exhaust port B.

【0027】

In this way, even during indoor heating, the room is dehumidified by the amount of "x", and dehumidifying and heating is performed.

【0028】

[Effect of the invention]

As described above, according to the present invention, in both cases of indoor cooling in summer and indoor heating in winter, air conditioning can be performed while dehumidifying the room. Alternatively, it has the advantage that frost formation and the like can be prevented, and the air conditioning load in the store can be reduced.

[Simple explanation of drawings]

[Figure 1]

Perspective view of the dehumidifying air conditioner according to the present invention [Figure 2]

Wind circuit diagram of a conventional dehumidifying air conditioner [Fig. 3]

An exploded perspective view of the dehumidifying air conditioner according to the present invention. [Fig. 4]

Cross-sectional view showing the operation of the damper mechanism [Fig. 5]

Wind circuit diagram showing the action during summer cooling [Fig. 6]

Wind circuit diagram showing the action during winter heating [Explanation of symbols]

10 ... Dehumidifying air conditioner, 11a ... 1st main air passage, 11b ... 2nd main air passage, 12a ... 1st sub air passage, 12b ... 2nd sub air passage, 13. .. Latent heat exchanger, 14 ... manifest heat exchanger, 16a ... 1st regeneration heater, 16b ... 2nd regeneration heater, 18a ~ 18d ... damper mechanism.