JP3435531B2 - Air conditioner using dehumidifying cooler - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of an air conditioner using a dehumidifying cooler for processing all latent heat loads. 2. Description of the Related Art At present, in a general air-conditioning system, in cooling in summer, cooling coils are used to cool air and perform dehumidification by cooling and dehumidification. FIG.
1 is a configuration diagram showing a conventional air conditioning system mainly used in office buildings and the like. In the figure, 1 is a refrigerator for producing chilled water, 2 is a chilled water pipe, 3 is an air conditioner, 4 is a chilled water coil, 5 is an air supply duct for supplying conditioned air to the room,
Reference numeral 6 denotes a return air duct for recirculating conditioned air, 7 denotes an exhaust duct for exhausting indoor air, 8 denotes an outside air intake duct, and 9 denotes a total heat exchanger. In this method, (1) the total heat exchange between the outside air introduced into the total heat exchanger 9 and the exhaust from the room is performed, the temperature and humidity of the outside air are reduced to some extent, and (2) the total heat exchanger 9 exits. Mix the air with the return air from the room,
(3) The air is adjusted to a temperature and humidity suitable for removing the sensible heat load and the latent heat load (humidity) in the room using the cold water coil 4 and supplied to the room. The temperature at each point shown in FIG. 3 is an example of a peak in summer, and the temperature and humidity at each point also change due to a change in indoor and outdoor loads. In the case of FIG. 3 , air supply of 16 ° C. is required. In this case, when considering only the temperature, for example, the cold water supply temperature from the refrigerator is set to about 9 ° C. A cold water return temperature of about 14 ° C. is sufficient, but in practice, in order to perform cooling and dehumidification, the cold water supply temperature from the refrigerator is about 7 ° C., and the cold water return temperature to the refrigerator is about 12 ° C. Cold water is needed. [0004] In the above-mentioned conventional air-conditioning system, since cooling and dehumidification of air are performed at the same time, the dehumidifying capacity depends on the cooling capacity. If (cooling load) is low and humidity is high (latent heat load is high), sufficient dehumidification cannot be performed by the coil and the room becomes uncomfortable high humidity, or air that has been cooled once to dehumidify Has to be heated again in accordance with the indoor conditions. [0005] Further, by increasing the temperature difference between the chilled water supply temperature from the chiller and the chilled water return temperature to the chiller, it is possible to reduce the amount of circulating water and save energy for the transfer power. When the cold water supply temperature is lower than normal (for example, 5 ° C.), the efficiency of the refrigerator (C
OP) does not result in overall energy savings. On the other hand, when the cold water return temperature is higher than usual (for example, 14 ° C.), a special coil is required to efficiently perform cooling and dehumidification at a higher temperature, which causes an increase in cost. The present invention solves the above-mentioned problem. Instead of cooling and dehumidifying by a conventional air conditioner, all the latent heat loads are processed by using a dehumidifying cooler to control air conditioning with a large temperature difference and control of humidity. An object of the present invention is to provide an air conditioner using a dehumidifying cooler that can be performed. [0007] For this purpose, an air conditioner using a dehumidifying cooler according to the present invention is connected to an air conditioner for supplying cooled air to a room and connected to the air conditioner. Outside air absorption
An inlet duct, an exhaust duct for exhausting room air,
A dehumidifying cooler provided between the exhaust duct and the outside air intake duct, a first chilled water coil provided in the air conditioner,
A second air supply duct disposed downstream of the dehumidifying cooler in the air suction duct;
The first cold water coil and the second cold water coil.
A chiller for supplying chilled water in the order of the water coil , wherein the dehumidifying cooler is rotatably provided between the exhaust duct and the outside air intake duct and a sensible heat exchange rotor; The heater is provided between the replacement rotor and the exhaust duct. [0008] Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of an air conditioner using the dehumidifying air conditioner of the present invention. FIG. 1 (A) is an overall configuration diagram, and FIG. 1 (B) is a perspective view showing the dehumidifying air conditioner of FIG. 1 (A). . In FIG. 1A, 1 is a refrigerator for producing cold water, 2 is a cold water pipe, 3 is an air conditioner, and 4 is an air conditioner.
A first chilled water coil provided therein , 5 is an air supply duct for supplying air-conditioned air to the room, 6 is a return air duct for recirculating the air-conditioned air, and 7 is an exhaust for exhausting the indoor air. A duct 8 is an outside air intake duct connected to the air conditioner . A dehumidifying cooler 10 is provided between the exhaust duct 7 and the outside air suction duct 8, and a second chilled water coil 15 is provided in the outside air suction duct 8 on the downstream side of the dehumidifying cooler 10. The first and second chilled water coils 4 and 15 are
Connected to the refrigerator 1 in series, and the refrigerator 1
Cold water is supplied in the order of the water coil 4 and the second cold water coil 15.
It is configured to supply . The dehumidifying cooler 10 is a device for processing all latent heat loads (humidity), and is rotatable between an exhaust duct 7 and an outside air intake duct 8 as shown in FIG. Dehumidification rotor 11 and sensible heat exchange rotor 12 provided in
And a heater 13 provided in the exhaust duct 7 between the dehumidification rotor 11 and the sensible heat exchange rotor 12. The dehumidifying rotor 11 removes moisture in the air by using absorption or adsorption, and is made of a hygroscopic material such as silica gel or zeolite. Further, the heater 13
As a heat source, abundant low-level exhaust heat discarded in other heat generating devices such as a cogeneration system, a district heating / cooling system, and a fuel cell is used. The operation of the air conditioner having the above configuration will be described. The introduced outside air is firstly dehumidified by absorbing or adsorbing the moisture of the outside air in the hygroscopic material in the dehumidifying rotor 11 of the dehumidifying cooler 10, and then cooled by the sensible heat of the exhaust gas in the sensible heat exchange rotor 12, Next, the second cold water coil 15
After being cooled in the air conditioner 3, it is sent to the air conditioner 3 where the return air duct 6
Is cooled by the first cooling coil 4 and supplied from the air supply duct 5 into the room. The remaining exhaust air from the room is heated by the outside air by the sensible heat exchange rotor 12 and further heated by the heater 13 and then flows to the dehumidifying rotor 11 to dry and regenerate the hygroscopic material and then exhausted. . The temperature at each point shown in FIG. 1A is an example of a peak in summer, and the dehumidifying / cooling machine 10 processes all of the latent heat load (humidity). Can be increased to about 9 ° C., the capacity and efficiency of the refrigerator 1 can be improved, and the temperature difference between the chilled water supply temperature and the chilled water return temperature can be increased.
It is possible to reduce the amount of water circulation and to save energy for the transfer power. FIG. 2 is a block diagram showing another example of an air conditioner using the dehumidifying cooler of the present invention. Note that the same components as those in the example of FIG.
In this example, the outdoor unit 16 and the indoor unit 17 of the heat pump GHP are connected by the refrigerant pipe 19, and as in FIG.
Dehumidifying cooler 1 between exhaust duct 7 and outside air intake duct 8
0 is disposed, and the heater 13 is heated by the exhaust heat of the outdoor unit 16. In the present invention, since the outside air which has come out of the dehumidifying cooler has a high temperature due to the exchange of isenthalpy such as latent heat and sensible heat, it is possible to use a normal cooling coil without using a special coil. The air conditioning of the difference can be performed, the amount of circulating water can be reduced, and the energy for the transfer power can be saved. In addition, since all of the latent heat load (humidity) can be processed by the dehumidifying cooler, the humidity can be controlled without being affected by the sensible heat load. Also,
Since cooling and dehumidification in the air conditioner is not required, the supply temperature of the cold water can be increased, and the capacity and efficiency of the refrigerator can be improved. In addition, since water does not condense in the cold water coil, drainage equipment for drain pans and air conditioners is not required. Further, when abundant low-level temperature waste heat discarded in a heat generation device such as a cogeneration system, a district heating / cooling system, a fuel cell, or a heat pump is used as a heat source of the heater of the dehumidifying / cooling machine, particularly in summer. The effective use of the exhaust heat can be achieved. In addition, it is possible to promote body temperature control by sweating and realize air conditioning that can follow individual differences.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an example of an air conditioner using a dehumidifying cooler of the present invention, FIG. 1 (A) is an overall configuration diagram, and FIG. 1 (B) is FIG.
It is a perspective view showing the dehumidification cooling machine of (A). FIG. 2 is a configuration diagram showing another example of an air conditioner using the dehumidifying cooler of the present invention. FIG. 3 is a configuration diagram showing a conventional air conditioning system. [Description of Signs] 1 ... Refrigerator, 2 ... Cooled water piping, 3 ... Air conditioner, 4 ... First chilled water coil 5 ... Air supply duct, 6 ... Return air duct, 7 ... Exhaust duct, 8
··· Outdoor air suction duct 10 ··· Dehumidifying cooler, 11 · · · Dehumidifying rotor, 12 · · · Sensible heat exchange rotor 13 · · · Heater, 15 · · · Second cold water coil, 16 · · Outdoor unit, 17 · Indoor unit 19 · Refrigerant piping

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-221618 (JP, A) JP-A-59-231340 (JP, A) JP-A-55-143337 (JP, A) 181818 (JP, U) Actually open sho 59-108132 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 3/00-3/16

Claims (1)

(57) [Claim 1] An air conditioner for supplying air cooled inside a room, an outside air intake duct connected to the air conditioner ,
An exhaust duct for exhausting the air, and dehumidifying air cooler is disposed between the exhaust duct and the outside air intake duct, the air conditioning machine
The first chilled water coil provided in the
A second chilled water coil disposed downstream of the dehumidifying cooler;
The first cold water coil and the second cold water coil are cooled in this order.
A refrigerator for supplying water, the dehumidifying cooler includes a dehumidifying rotor and a sensible heat exchange rotor rotatably provided between the exhaust duct and the outside air intake duct, and a dehumidifying rotor and a sensible heat exchange rotor. An air conditioner using a dehumidifying cooler, characterized by comprising a heater provided in an exhaust duct between the air conditioners.